2019-06-04 08:11:33 +00:00
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// SPDX-License-Identifier: GPL-2.0-only
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iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
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/*
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2018-12-01 19:19:10 +00:00
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* IOMMU API for Rockchip
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*
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* Module Authors: Simon Xue <xxm@rock-chips.com>
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* Daniel Kurtz <djkurtz@chromium.org>
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iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
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*/
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2018-03-23 07:38:08 +00:00
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#include <linux/clk.h>
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iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
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#include <linux/compiler.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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2017-04-26 13:46:20 +00:00
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#include <linux/dma-mapping.h>
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iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/iommu.h>
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2018-03-23 07:38:05 +00:00
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#include <linux/iopoll.h>
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iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
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#include <linux/list.h>
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#include <linux/mm.h>
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2018-12-01 19:19:10 +00:00
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#include <linux/init.h>
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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2018-03-23 07:38:13 +00:00
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#include <linux/pm_runtime.h>
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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/** MMU register offsets */
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#define RK_MMU_DTE_ADDR 0x00 /* Directory table address */
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#define RK_MMU_STATUS 0x04
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#define RK_MMU_COMMAND 0x08
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#define RK_MMU_PAGE_FAULT_ADDR 0x0C /* IOVA of last page fault */
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#define RK_MMU_ZAP_ONE_LINE 0x10 /* Shootdown one IOTLB entry */
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#define RK_MMU_INT_RAWSTAT 0x14 /* IRQ status ignoring mask */
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#define RK_MMU_INT_CLEAR 0x18 /* Acknowledge and re-arm irq */
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#define RK_MMU_INT_MASK 0x1C /* IRQ enable */
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#define RK_MMU_INT_STATUS 0x20 /* IRQ status after masking */
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#define RK_MMU_AUTO_GATING 0x24
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#define DTE_ADDR_DUMMY 0xCAFEBABE
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2018-03-23 07:38:05 +00:00
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#define RK_MMU_POLL_PERIOD_US 100
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#define RK_MMU_FORCE_RESET_TIMEOUT_US 100000
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#define RK_MMU_POLL_TIMEOUT_US 1000
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
/* RK_MMU_STATUS fields */
|
|
|
|
#define RK_MMU_STATUS_PAGING_ENABLED BIT(0)
|
|
|
|
#define RK_MMU_STATUS_PAGE_FAULT_ACTIVE BIT(1)
|
|
|
|
#define RK_MMU_STATUS_STALL_ACTIVE BIT(2)
|
|
|
|
#define RK_MMU_STATUS_IDLE BIT(3)
|
|
|
|
#define RK_MMU_STATUS_REPLAY_BUFFER_EMPTY BIT(4)
|
|
|
|
#define RK_MMU_STATUS_PAGE_FAULT_IS_WRITE BIT(5)
|
|
|
|
#define RK_MMU_STATUS_STALL_NOT_ACTIVE BIT(31)
|
|
|
|
|
|
|
|
/* RK_MMU_COMMAND command values */
|
|
|
|
#define RK_MMU_CMD_ENABLE_PAGING 0 /* Enable memory translation */
|
|
|
|
#define RK_MMU_CMD_DISABLE_PAGING 1 /* Disable memory translation */
|
|
|
|
#define RK_MMU_CMD_ENABLE_STALL 2 /* Stall paging to allow other cmds */
|
|
|
|
#define RK_MMU_CMD_DISABLE_STALL 3 /* Stop stall re-enables paging */
|
|
|
|
#define RK_MMU_CMD_ZAP_CACHE 4 /* Shoot down entire IOTLB */
|
|
|
|
#define RK_MMU_CMD_PAGE_FAULT_DONE 5 /* Clear page fault */
|
|
|
|
#define RK_MMU_CMD_FORCE_RESET 6 /* Reset all registers */
|
|
|
|
|
|
|
|
/* RK_MMU_INT_* register fields */
|
|
|
|
#define RK_MMU_IRQ_PAGE_FAULT 0x01 /* page fault */
|
|
|
|
#define RK_MMU_IRQ_BUS_ERROR 0x02 /* bus read error */
|
|
|
|
#define RK_MMU_IRQ_MASK (RK_MMU_IRQ_PAGE_FAULT | RK_MMU_IRQ_BUS_ERROR)
|
|
|
|
|
|
|
|
#define NUM_DT_ENTRIES 1024
|
|
|
|
#define NUM_PT_ENTRIES 1024
|
|
|
|
|
|
|
|
#define SPAGE_ORDER 12
|
|
|
|
#define SPAGE_SIZE (1 << SPAGE_ORDER)
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Support mapping any size that fits in one page table:
|
|
|
|
* 4 KiB to 4 MiB
|
|
|
|
*/
|
|
|
|
#define RK_IOMMU_PGSIZE_BITMAP 0x007ff000
|
|
|
|
|
|
|
|
struct rk_iommu_domain {
|
|
|
|
struct list_head iommus;
|
|
|
|
u32 *dt; /* page directory table */
|
2016-06-24 02:13:29 +00:00
|
|
|
dma_addr_t dt_dma;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
spinlock_t iommus_lock; /* lock for iommus list */
|
|
|
|
spinlock_t dt_lock; /* lock for modifying page directory table */
|
2015-03-26 12:43:17 +00:00
|
|
|
|
|
|
|
struct iommu_domain domain;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
};
|
|
|
|
|
2018-03-23 07:38:08 +00:00
|
|
|
/* list of clocks required by IOMMU */
|
|
|
|
static const char * const rk_iommu_clocks[] = {
|
|
|
|
"aclk", "iface",
|
|
|
|
};
|
|
|
|
|
2021-06-04 16:44:40 +00:00
|
|
|
struct rk_iommu_ops {
|
|
|
|
phys_addr_t (*pt_address)(u32 dte);
|
|
|
|
u32 (*mk_dtentries)(dma_addr_t pt_dma);
|
|
|
|
u32 (*mk_ptentries)(phys_addr_t page, int prot);
|
|
|
|
phys_addr_t (*dte_addr_phys)(u32 addr);
|
|
|
|
u32 (*dma_addr_dte)(dma_addr_t dt_dma);
|
|
|
|
u64 dma_bit_mask;
|
|
|
|
};
|
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
struct rk_iommu {
|
|
|
|
struct device *dev;
|
2016-01-19 07:03:00 +00:00
|
|
|
void __iomem **bases;
|
|
|
|
int num_mmu;
|
2019-09-25 18:43:46 +00:00
|
|
|
int num_irq;
|
2018-03-23 07:38:08 +00:00
|
|
|
struct clk_bulk_data *clocks;
|
|
|
|
int num_clocks;
|
2017-07-24 02:37:15 +00:00
|
|
|
bool reset_disabled;
|
2017-03-31 14:26:03 +00:00
|
|
|
struct iommu_device iommu;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
struct list_head node; /* entry in rk_iommu_domain.iommus */
|
|
|
|
struct iommu_domain *domain; /* domain to which iommu is attached */
|
2018-03-23 07:38:14 +00:00
|
|
|
struct iommu_group *group;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
};
|
|
|
|
|
2018-03-23 07:38:11 +00:00
|
|
|
struct rk_iommudata {
|
2018-03-23 07:38:13 +00:00
|
|
|
struct device_link *link; /* runtime PM link from IOMMU to master */
|
2018-03-23 07:38:11 +00:00
|
|
|
struct rk_iommu *iommu;
|
|
|
|
};
|
|
|
|
|
2018-03-23 07:38:10 +00:00
|
|
|
static struct device *dma_dev;
|
2021-06-04 16:44:40 +00:00
|
|
|
static const struct rk_iommu_ops *rk_ops;
|
2018-03-23 07:38:10 +00:00
|
|
|
|
2016-06-24 02:13:29 +00:00
|
|
|
static inline void rk_table_flush(struct rk_iommu_domain *dom, dma_addr_t dma,
|
|
|
|
unsigned int count)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
2016-06-24 02:13:29 +00:00
|
|
|
size_t size = count * sizeof(u32); /* count of u32 entry */
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2018-03-23 07:38:10 +00:00
|
|
|
dma_sync_single_for_device(dma_dev, dma, size, DMA_TO_DEVICE);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
2015-03-26 12:43:17 +00:00
|
|
|
static struct rk_iommu_domain *to_rk_domain(struct iommu_domain *dom)
|
|
|
|
{
|
|
|
|
return container_of(dom, struct rk_iommu_domain, domain);
|
|
|
|
}
|
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
/*
|
|
|
|
* The Rockchip rk3288 iommu uses a 2-level page table.
|
|
|
|
* The first level is the "Directory Table" (DT).
|
|
|
|
* The DT consists of 1024 4-byte Directory Table Entries (DTEs), each pointing
|
|
|
|
* to a "Page Table".
|
|
|
|
* The second level is the 1024 Page Tables (PT).
|
|
|
|
* Each PT consists of 1024 4-byte Page Table Entries (PTEs), each pointing to
|
|
|
|
* a 4 KB page of physical memory.
|
|
|
|
*
|
|
|
|
* The DT and each PT fits in a single 4 KB page (4-bytes * 1024 entries).
|
|
|
|
* Each iommu device has a MMU_DTE_ADDR register that contains the physical
|
|
|
|
* address of the start of the DT page.
|
|
|
|
*
|
|
|
|
* The structure of the page table is as follows:
|
|
|
|
*
|
|
|
|
* DT
|
|
|
|
* MMU_DTE_ADDR -> +-----+
|
|
|
|
* | |
|
|
|
|
* +-----+ PT
|
|
|
|
* | DTE | -> +-----+
|
|
|
|
* +-----+ | | Memory
|
|
|
|
* | | +-----+ Page
|
|
|
|
* | | | PTE | -> +-----+
|
|
|
|
* +-----+ +-----+ | |
|
|
|
|
* | | | |
|
|
|
|
* | | | |
|
|
|
|
* +-----+ | |
|
|
|
|
* | |
|
|
|
|
* | |
|
|
|
|
* +-----+
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Each DTE has a PT address and a valid bit:
|
|
|
|
* +---------------------+-----------+-+
|
|
|
|
* | PT address | Reserved |V|
|
|
|
|
* +---------------------+-----------+-+
|
|
|
|
* 31:12 - PT address (PTs always starts on a 4 KB boundary)
|
|
|
|
* 11: 1 - Reserved
|
|
|
|
* 0 - 1 if PT @ PT address is valid
|
|
|
|
*/
|
|
|
|
#define RK_DTE_PT_ADDRESS_MASK 0xfffff000
|
|
|
|
#define RK_DTE_PT_VALID BIT(0)
|
|
|
|
|
|
|
|
static inline phys_addr_t rk_dte_pt_address(u32 dte)
|
|
|
|
{
|
|
|
|
return (phys_addr_t)dte & RK_DTE_PT_ADDRESS_MASK;
|
|
|
|
}
|
|
|
|
|
2021-06-04 16:44:41 +00:00
|
|
|
/*
|
|
|
|
* In v2:
|
|
|
|
* 31:12 - PT address bit 31:0
|
|
|
|
* 11: 8 - PT address bit 35:32
|
|
|
|
* 7: 4 - PT address bit 39:36
|
|
|
|
* 3: 1 - Reserved
|
|
|
|
* 0 - 1 if PT @ PT address is valid
|
|
|
|
*/
|
|
|
|
#define RK_DTE_PT_ADDRESS_MASK_V2 GENMASK_ULL(31, 4)
|
|
|
|
#define DTE_HI_MASK1 GENMASK(11, 8)
|
|
|
|
#define DTE_HI_MASK2 GENMASK(7, 4)
|
|
|
|
#define DTE_HI_SHIFT1 24 /* shift bit 8 to bit 32 */
|
|
|
|
#define DTE_HI_SHIFT2 32 /* shift bit 4 to bit 36 */
|
2021-11-24 02:13:25 +00:00
|
|
|
#define PAGE_DESC_HI_MASK1 GENMASK_ULL(35, 32)
|
|
|
|
#define PAGE_DESC_HI_MASK2 GENMASK_ULL(39, 36)
|
2021-06-04 16:44:41 +00:00
|
|
|
|
|
|
|
static inline phys_addr_t rk_dte_pt_address_v2(u32 dte)
|
|
|
|
{
|
|
|
|
u64 dte_v2 = dte;
|
|
|
|
|
|
|
|
dte_v2 = ((dte_v2 & DTE_HI_MASK2) << DTE_HI_SHIFT2) |
|
|
|
|
((dte_v2 & DTE_HI_MASK1) << DTE_HI_SHIFT1) |
|
|
|
|
(dte_v2 & RK_DTE_PT_ADDRESS_MASK);
|
|
|
|
|
|
|
|
return (phys_addr_t)dte_v2;
|
|
|
|
}
|
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
static inline bool rk_dte_is_pt_valid(u32 dte)
|
|
|
|
{
|
|
|
|
return dte & RK_DTE_PT_VALID;
|
|
|
|
}
|
|
|
|
|
2016-06-24 02:13:29 +00:00
|
|
|
static inline u32 rk_mk_dte(dma_addr_t pt_dma)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
2016-06-24 02:13:29 +00:00
|
|
|
return (pt_dma & RK_DTE_PT_ADDRESS_MASK) | RK_DTE_PT_VALID;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
2021-06-04 16:44:41 +00:00
|
|
|
static inline u32 rk_mk_dte_v2(dma_addr_t pt_dma)
|
|
|
|
{
|
|
|
|
pt_dma = (pt_dma & RK_DTE_PT_ADDRESS_MASK) |
|
|
|
|
((pt_dma & PAGE_DESC_HI_MASK1) >> DTE_HI_SHIFT1) |
|
|
|
|
(pt_dma & PAGE_DESC_HI_MASK2) >> DTE_HI_SHIFT2;
|
|
|
|
|
|
|
|
return (pt_dma & RK_DTE_PT_ADDRESS_MASK_V2) | RK_DTE_PT_VALID;
|
|
|
|
}
|
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
/*
|
|
|
|
* Each PTE has a Page address, some flags and a valid bit:
|
|
|
|
* +---------------------+---+-------+-+
|
|
|
|
* | Page address |Rsv| Flags |V|
|
|
|
|
* +---------------------+---+-------+-+
|
|
|
|
* 31:12 - Page address (Pages always start on a 4 KB boundary)
|
|
|
|
* 11: 9 - Reserved
|
|
|
|
* 8: 1 - Flags
|
|
|
|
* 8 - Read allocate - allocate cache space on read misses
|
|
|
|
* 7 - Read cache - enable cache & prefetch of data
|
|
|
|
* 6 - Write buffer - enable delaying writes on their way to memory
|
|
|
|
* 5 - Write allocate - allocate cache space on write misses
|
|
|
|
* 4 - Write cache - different writes can be merged together
|
|
|
|
* 3 - Override cache attributes
|
|
|
|
* if 1, bits 4-8 control cache attributes
|
|
|
|
* if 0, the system bus defaults are used
|
|
|
|
* 2 - Writable
|
|
|
|
* 1 - Readable
|
|
|
|
* 0 - 1 if Page @ Page address is valid
|
|
|
|
*/
|
|
|
|
#define RK_PTE_PAGE_ADDRESS_MASK 0xfffff000
|
|
|
|
#define RK_PTE_PAGE_FLAGS_MASK 0x000001fe
|
|
|
|
#define RK_PTE_PAGE_WRITABLE BIT(2)
|
|
|
|
#define RK_PTE_PAGE_READABLE BIT(1)
|
|
|
|
#define RK_PTE_PAGE_VALID BIT(0)
|
|
|
|
|
|
|
|
static inline bool rk_pte_is_page_valid(u32 pte)
|
|
|
|
{
|
|
|
|
return pte & RK_PTE_PAGE_VALID;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* TODO: set cache flags per prot IOMMU_CACHE */
|
|
|
|
static u32 rk_mk_pte(phys_addr_t page, int prot)
|
|
|
|
{
|
|
|
|
u32 flags = 0;
|
|
|
|
flags |= (prot & IOMMU_READ) ? RK_PTE_PAGE_READABLE : 0;
|
|
|
|
flags |= (prot & IOMMU_WRITE) ? RK_PTE_PAGE_WRITABLE : 0;
|
|
|
|
page &= RK_PTE_PAGE_ADDRESS_MASK;
|
|
|
|
return page | flags | RK_PTE_PAGE_VALID;
|
|
|
|
}
|
|
|
|
|
2021-06-04 16:44:41 +00:00
|
|
|
/*
|
|
|
|
* In v2:
|
|
|
|
* 31:12 - Page address bit 31:0
|
|
|
|
* 11:9 - Page address bit 34:32
|
|
|
|
* 8:4 - Page address bit 39:35
|
|
|
|
* 3 - Security
|
|
|
|
* 2 - Readable
|
|
|
|
* 1 - Writable
|
|
|
|
* 0 - 1 if Page @ Page address is valid
|
|
|
|
*/
|
|
|
|
#define RK_PTE_PAGE_READABLE_V2 BIT(2)
|
|
|
|
#define RK_PTE_PAGE_WRITABLE_V2 BIT(1)
|
|
|
|
|
|
|
|
static u32 rk_mk_pte_v2(phys_addr_t page, int prot)
|
|
|
|
{
|
|
|
|
u32 flags = 0;
|
|
|
|
|
|
|
|
flags |= (prot & IOMMU_READ) ? RK_PTE_PAGE_READABLE_V2 : 0;
|
|
|
|
flags |= (prot & IOMMU_WRITE) ? RK_PTE_PAGE_WRITABLE_V2 : 0;
|
|
|
|
|
|
|
|
return rk_mk_dte_v2(page) | flags;
|
|
|
|
}
|
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
static u32 rk_mk_pte_invalid(u32 pte)
|
|
|
|
{
|
|
|
|
return pte & ~RK_PTE_PAGE_VALID;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* rk3288 iova (IOMMU Virtual Address) format
|
|
|
|
* 31 22.21 12.11 0
|
|
|
|
* +-----------+-----------+-------------+
|
|
|
|
* | DTE index | PTE index | Page offset |
|
|
|
|
* +-----------+-----------+-------------+
|
|
|
|
* 31:22 - DTE index - index of DTE in DT
|
|
|
|
* 21:12 - PTE index - index of PTE in PT @ DTE.pt_address
|
|
|
|
* 11: 0 - Page offset - offset into page @ PTE.page_address
|
|
|
|
*/
|
|
|
|
#define RK_IOVA_DTE_MASK 0xffc00000
|
|
|
|
#define RK_IOVA_DTE_SHIFT 22
|
|
|
|
#define RK_IOVA_PTE_MASK 0x003ff000
|
|
|
|
#define RK_IOVA_PTE_SHIFT 12
|
|
|
|
#define RK_IOVA_PAGE_MASK 0x00000fff
|
|
|
|
#define RK_IOVA_PAGE_SHIFT 0
|
|
|
|
|
|
|
|
static u32 rk_iova_dte_index(dma_addr_t iova)
|
|
|
|
{
|
|
|
|
return (u32)(iova & RK_IOVA_DTE_MASK) >> RK_IOVA_DTE_SHIFT;
|
|
|
|
}
|
|
|
|
|
|
|
|
static u32 rk_iova_pte_index(dma_addr_t iova)
|
|
|
|
{
|
|
|
|
return (u32)(iova & RK_IOVA_PTE_MASK) >> RK_IOVA_PTE_SHIFT;
|
|
|
|
}
|
|
|
|
|
|
|
|
static u32 rk_iova_page_offset(dma_addr_t iova)
|
|
|
|
{
|
|
|
|
return (u32)(iova & RK_IOVA_PAGE_MASK) >> RK_IOVA_PAGE_SHIFT;
|
|
|
|
}
|
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
static u32 rk_iommu_read(void __iomem *base, u32 offset)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
2016-01-19 07:03:00 +00:00
|
|
|
return readl(base + offset);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
static void rk_iommu_write(void __iomem *base, u32 offset, u32 value)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
2016-01-19 07:03:00 +00:00
|
|
|
writel(value, base + offset);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void rk_iommu_command(struct rk_iommu *iommu, u32 command)
|
|
|
|
{
|
2016-01-19 07:03:00 +00:00
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < iommu->num_mmu; i++)
|
|
|
|
writel(command, iommu->bases[i] + RK_MMU_COMMAND);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
static void rk_iommu_base_command(void __iomem *base, u32 command)
|
|
|
|
{
|
|
|
|
writel(command, base + RK_MMU_COMMAND);
|
|
|
|
}
|
2018-03-23 07:38:06 +00:00
|
|
|
static void rk_iommu_zap_lines(struct rk_iommu *iommu, dma_addr_t iova_start,
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
size_t size)
|
|
|
|
{
|
2016-01-19 07:03:00 +00:00
|
|
|
int i;
|
2018-03-23 07:38:06 +00:00
|
|
|
dma_addr_t iova_end = iova_start + size;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
/*
|
|
|
|
* TODO(djkurtz): Figure out when it is more efficient to shootdown the
|
|
|
|
* entire iotlb rather than iterate over individual iovas.
|
|
|
|
*/
|
2018-03-23 07:38:06 +00:00
|
|
|
for (i = 0; i < iommu->num_mmu; i++) {
|
|
|
|
dma_addr_t iova;
|
|
|
|
|
|
|
|
for (iova = iova_start; iova < iova_end; iova += SPAGE_SIZE)
|
2016-01-19 07:03:00 +00:00
|
|
|
rk_iommu_write(iommu->bases[i], RK_MMU_ZAP_ONE_LINE, iova);
|
2018-03-23 07:38:06 +00:00
|
|
|
}
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static bool rk_iommu_is_stall_active(struct rk_iommu *iommu)
|
|
|
|
{
|
2016-01-19 07:03:00 +00:00
|
|
|
bool active = true;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < iommu->num_mmu; i++)
|
2016-04-05 14:05:46 +00:00
|
|
|
active &= !!(rk_iommu_read(iommu->bases[i], RK_MMU_STATUS) &
|
|
|
|
RK_MMU_STATUS_STALL_ACTIVE);
|
2016-01-19 07:03:00 +00:00
|
|
|
|
|
|
|
return active;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static bool rk_iommu_is_paging_enabled(struct rk_iommu *iommu)
|
|
|
|
{
|
2016-01-19 07:03:00 +00:00
|
|
|
bool enable = true;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < iommu->num_mmu; i++)
|
2016-04-05 14:05:46 +00:00
|
|
|
enable &= !!(rk_iommu_read(iommu->bases[i], RK_MMU_STATUS) &
|
|
|
|
RK_MMU_STATUS_PAGING_ENABLED);
|
2016-01-19 07:03:00 +00:00
|
|
|
|
|
|
|
return enable;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
2018-03-23 07:38:05 +00:00
|
|
|
static bool rk_iommu_is_reset_done(struct rk_iommu *iommu)
|
|
|
|
{
|
|
|
|
bool done = true;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < iommu->num_mmu; i++)
|
|
|
|
done &= rk_iommu_read(iommu->bases[i], RK_MMU_DTE_ADDR) == 0;
|
|
|
|
|
|
|
|
return done;
|
|
|
|
}
|
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
static int rk_iommu_enable_stall(struct rk_iommu *iommu)
|
|
|
|
{
|
2016-01-19 07:03:00 +00:00
|
|
|
int ret, i;
|
2018-03-23 07:38:05 +00:00
|
|
|
bool val;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
if (rk_iommu_is_stall_active(iommu))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* Stall can only be enabled if paging is enabled */
|
|
|
|
if (!rk_iommu_is_paging_enabled(iommu))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
rk_iommu_command(iommu, RK_MMU_CMD_ENABLE_STALL);
|
|
|
|
|
2018-03-23 07:38:05 +00:00
|
|
|
ret = readx_poll_timeout(rk_iommu_is_stall_active, iommu, val,
|
|
|
|
val, RK_MMU_POLL_PERIOD_US,
|
|
|
|
RK_MMU_POLL_TIMEOUT_US);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
if (ret)
|
2016-01-19 07:03:00 +00:00
|
|
|
for (i = 0; i < iommu->num_mmu; i++)
|
|
|
|
dev_err(iommu->dev, "Enable stall request timed out, status: %#08x\n",
|
|
|
|
rk_iommu_read(iommu->bases[i], RK_MMU_STATUS));
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rk_iommu_disable_stall(struct rk_iommu *iommu)
|
|
|
|
{
|
2016-01-19 07:03:00 +00:00
|
|
|
int ret, i;
|
2018-03-23 07:38:05 +00:00
|
|
|
bool val;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
if (!rk_iommu_is_stall_active(iommu))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
rk_iommu_command(iommu, RK_MMU_CMD_DISABLE_STALL);
|
|
|
|
|
2018-03-23 07:38:05 +00:00
|
|
|
ret = readx_poll_timeout(rk_iommu_is_stall_active, iommu, val,
|
|
|
|
!val, RK_MMU_POLL_PERIOD_US,
|
|
|
|
RK_MMU_POLL_TIMEOUT_US);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
if (ret)
|
2016-01-19 07:03:00 +00:00
|
|
|
for (i = 0; i < iommu->num_mmu; i++)
|
|
|
|
dev_err(iommu->dev, "Disable stall request timed out, status: %#08x\n",
|
|
|
|
rk_iommu_read(iommu->bases[i], RK_MMU_STATUS));
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rk_iommu_enable_paging(struct rk_iommu *iommu)
|
|
|
|
{
|
2016-01-19 07:03:00 +00:00
|
|
|
int ret, i;
|
2018-03-23 07:38:05 +00:00
|
|
|
bool val;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
if (rk_iommu_is_paging_enabled(iommu))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
rk_iommu_command(iommu, RK_MMU_CMD_ENABLE_PAGING);
|
|
|
|
|
2018-03-23 07:38:05 +00:00
|
|
|
ret = readx_poll_timeout(rk_iommu_is_paging_enabled, iommu, val,
|
|
|
|
val, RK_MMU_POLL_PERIOD_US,
|
|
|
|
RK_MMU_POLL_TIMEOUT_US);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
if (ret)
|
2016-01-19 07:03:00 +00:00
|
|
|
for (i = 0; i < iommu->num_mmu; i++)
|
|
|
|
dev_err(iommu->dev, "Enable paging request timed out, status: %#08x\n",
|
|
|
|
rk_iommu_read(iommu->bases[i], RK_MMU_STATUS));
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rk_iommu_disable_paging(struct rk_iommu *iommu)
|
|
|
|
{
|
2016-01-19 07:03:00 +00:00
|
|
|
int ret, i;
|
2018-03-23 07:38:05 +00:00
|
|
|
bool val;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
if (!rk_iommu_is_paging_enabled(iommu))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
rk_iommu_command(iommu, RK_MMU_CMD_DISABLE_PAGING);
|
|
|
|
|
2018-03-23 07:38:05 +00:00
|
|
|
ret = readx_poll_timeout(rk_iommu_is_paging_enabled, iommu, val,
|
|
|
|
!val, RK_MMU_POLL_PERIOD_US,
|
|
|
|
RK_MMU_POLL_TIMEOUT_US);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
if (ret)
|
2016-01-19 07:03:00 +00:00
|
|
|
for (i = 0; i < iommu->num_mmu; i++)
|
|
|
|
dev_err(iommu->dev, "Disable paging request timed out, status: %#08x\n",
|
|
|
|
rk_iommu_read(iommu->bases[i], RK_MMU_STATUS));
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rk_iommu_force_reset(struct rk_iommu *iommu)
|
|
|
|
{
|
2016-01-19 07:03:00 +00:00
|
|
|
int ret, i;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
u32 dte_addr;
|
2018-03-23 07:38:05 +00:00
|
|
|
bool val;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2017-07-24 02:37:15 +00:00
|
|
|
if (iommu->reset_disabled)
|
|
|
|
return 0;
|
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
/*
|
|
|
|
* Check if register DTE_ADDR is working by writing DTE_ADDR_DUMMY
|
|
|
|
* and verifying that upper 5 nybbles are read back.
|
|
|
|
*/
|
2016-01-19 07:03:00 +00:00
|
|
|
for (i = 0; i < iommu->num_mmu; i++) {
|
2021-06-04 16:44:40 +00:00
|
|
|
dte_addr = rk_ops->pt_address(DTE_ADDR_DUMMY);
|
|
|
|
rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR, dte_addr);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2021-06-04 16:44:40 +00:00
|
|
|
if (dte_addr != rk_iommu_read(iommu->bases[i], RK_MMU_DTE_ADDR)) {
|
2016-01-19 07:03:00 +00:00
|
|
|
dev_err(iommu->dev, "Error during raw reset. MMU_DTE_ADDR is not functioning\n");
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
rk_iommu_command(iommu, RK_MMU_CMD_FORCE_RESET);
|
|
|
|
|
2018-03-23 07:38:05 +00:00
|
|
|
ret = readx_poll_timeout(rk_iommu_is_reset_done, iommu, val,
|
|
|
|
val, RK_MMU_FORCE_RESET_TIMEOUT_US,
|
|
|
|
RK_MMU_POLL_TIMEOUT_US);
|
|
|
|
if (ret) {
|
|
|
|
dev_err(iommu->dev, "FORCE_RESET command timed out\n");
|
|
|
|
return ret;
|
2016-01-19 07:03:00 +00:00
|
|
|
}
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
return 0;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
2021-06-04 16:44:40 +00:00
|
|
|
static inline phys_addr_t rk_dte_addr_phys(u32 addr)
|
|
|
|
{
|
|
|
|
return (phys_addr_t)addr;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline u32 rk_dma_addr_dte(dma_addr_t dt_dma)
|
|
|
|
{
|
|
|
|
return dt_dma;
|
|
|
|
}
|
|
|
|
|
2021-06-04 16:44:41 +00:00
|
|
|
#define DT_HI_MASK GENMASK_ULL(39, 32)
|
2021-07-12 10:12:32 +00:00
|
|
|
#define DTE_BASE_HI_MASK GENMASK(11, 4)
|
2021-06-04 16:44:41 +00:00
|
|
|
#define DT_SHIFT 28
|
|
|
|
|
|
|
|
static inline phys_addr_t rk_dte_addr_phys_v2(u32 addr)
|
|
|
|
{
|
2021-07-12 10:12:32 +00:00
|
|
|
u64 addr64 = addr;
|
|
|
|
return (phys_addr_t)(addr64 & RK_DTE_PT_ADDRESS_MASK) |
|
|
|
|
((addr64 & DTE_BASE_HI_MASK) << DT_SHIFT);
|
2021-06-04 16:44:41 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline u32 rk_dma_addr_dte_v2(dma_addr_t dt_dma)
|
|
|
|
{
|
|
|
|
return (dt_dma & RK_DTE_PT_ADDRESS_MASK) |
|
|
|
|
((dt_dma & DT_HI_MASK) >> DT_SHIFT);
|
|
|
|
}
|
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
static void log_iova(struct rk_iommu *iommu, int index, dma_addr_t iova)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
2016-01-19 07:03:00 +00:00
|
|
|
void __iomem *base = iommu->bases[index];
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
u32 dte_index, pte_index, page_offset;
|
|
|
|
u32 mmu_dte_addr;
|
|
|
|
phys_addr_t mmu_dte_addr_phys, dte_addr_phys;
|
|
|
|
u32 *dte_addr;
|
|
|
|
u32 dte;
|
|
|
|
phys_addr_t pte_addr_phys = 0;
|
|
|
|
u32 *pte_addr = NULL;
|
|
|
|
u32 pte = 0;
|
|
|
|
phys_addr_t page_addr_phys = 0;
|
|
|
|
u32 page_flags = 0;
|
|
|
|
|
|
|
|
dte_index = rk_iova_dte_index(iova);
|
|
|
|
pte_index = rk_iova_pte_index(iova);
|
|
|
|
page_offset = rk_iova_page_offset(iova);
|
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
mmu_dte_addr = rk_iommu_read(base, RK_MMU_DTE_ADDR);
|
2021-06-04 16:44:40 +00:00
|
|
|
mmu_dte_addr_phys = rk_ops->dte_addr_phys(mmu_dte_addr);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
dte_addr_phys = mmu_dte_addr_phys + (4 * dte_index);
|
|
|
|
dte_addr = phys_to_virt(dte_addr_phys);
|
|
|
|
dte = *dte_addr;
|
|
|
|
|
|
|
|
if (!rk_dte_is_pt_valid(dte))
|
|
|
|
goto print_it;
|
|
|
|
|
2021-06-04 16:44:40 +00:00
|
|
|
pte_addr_phys = rk_ops->pt_address(dte) + (pte_index * 4);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
pte_addr = phys_to_virt(pte_addr_phys);
|
|
|
|
pte = *pte_addr;
|
|
|
|
|
|
|
|
if (!rk_pte_is_page_valid(pte))
|
|
|
|
goto print_it;
|
|
|
|
|
2021-06-04 16:44:40 +00:00
|
|
|
page_addr_phys = rk_ops->pt_address(pte) + page_offset;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
page_flags = pte & RK_PTE_PAGE_FLAGS_MASK;
|
|
|
|
|
|
|
|
print_it:
|
|
|
|
dev_err(iommu->dev, "iova = %pad: dte_index: %#03x pte_index: %#03x page_offset: %#03x\n",
|
|
|
|
&iova, dte_index, pte_index, page_offset);
|
|
|
|
dev_err(iommu->dev, "mmu_dte_addr: %pa dte@%pa: %#08x valid: %u pte@%pa: %#08x valid: %u page@%pa flags: %#03x\n",
|
|
|
|
&mmu_dte_addr_phys, &dte_addr_phys, dte,
|
|
|
|
rk_dte_is_pt_valid(dte), &pte_addr_phys, pte,
|
|
|
|
rk_pte_is_page_valid(pte), &page_addr_phys, page_flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static irqreturn_t rk_iommu_irq(int irq, void *dev_id)
|
|
|
|
{
|
|
|
|
struct rk_iommu *iommu = dev_id;
|
|
|
|
u32 status;
|
|
|
|
u32 int_status;
|
|
|
|
dma_addr_t iova;
|
2016-01-19 07:03:00 +00:00
|
|
|
irqreturn_t ret = IRQ_NONE;
|
2018-08-24 15:06:36 +00:00
|
|
|
int i, err;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2018-08-24 15:06:36 +00:00
|
|
|
err = pm_runtime_get_if_in_use(iommu->dev);
|
2019-11-11 18:55:18 +00:00
|
|
|
if (!err || WARN_ON_ONCE(err < 0))
|
2018-08-24 15:06:36 +00:00
|
|
|
return ret;
|
2018-03-23 07:38:13 +00:00
|
|
|
|
|
|
|
if (WARN_ON(clk_bulk_enable(iommu->num_clocks, iommu->clocks)))
|
|
|
|
goto out;
|
2018-03-23 07:38:08 +00:00
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
for (i = 0; i < iommu->num_mmu; i++) {
|
|
|
|
int_status = rk_iommu_read(iommu->bases[i], RK_MMU_INT_STATUS);
|
|
|
|
if (int_status == 0)
|
|
|
|
continue;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
ret = IRQ_HANDLED;
|
|
|
|
iova = rk_iommu_read(iommu->bases[i], RK_MMU_PAGE_FAULT_ADDR);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
if (int_status & RK_MMU_IRQ_PAGE_FAULT) {
|
|
|
|
int flags;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
status = rk_iommu_read(iommu->bases[i], RK_MMU_STATUS);
|
|
|
|
flags = (status & RK_MMU_STATUS_PAGE_FAULT_IS_WRITE) ?
|
|
|
|
IOMMU_FAULT_WRITE : IOMMU_FAULT_READ;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
dev_err(iommu->dev, "Page fault at %pad of type %s\n",
|
|
|
|
&iova,
|
|
|
|
(flags == IOMMU_FAULT_WRITE) ? "write" : "read");
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
log_iova(iommu, i, iova);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
/*
|
|
|
|
* Report page fault to any installed handlers.
|
|
|
|
* Ignore the return code, though, since we always zap cache
|
|
|
|
* and clear the page fault anyway.
|
|
|
|
*/
|
|
|
|
if (iommu->domain)
|
|
|
|
report_iommu_fault(iommu->domain, iommu->dev, iova,
|
|
|
|
flags);
|
|
|
|
else
|
|
|
|
dev_err(iommu->dev, "Page fault while iommu not attached to domain?\n");
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
rk_iommu_base_command(iommu->bases[i], RK_MMU_CMD_ZAP_CACHE);
|
|
|
|
rk_iommu_base_command(iommu->bases[i], RK_MMU_CMD_PAGE_FAULT_DONE);
|
|
|
|
}
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
if (int_status & RK_MMU_IRQ_BUS_ERROR)
|
|
|
|
dev_err(iommu->dev, "BUS_ERROR occurred at %pad\n", &iova);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
if (int_status & ~RK_MMU_IRQ_MASK)
|
|
|
|
dev_err(iommu->dev, "unexpected int_status: %#08x\n",
|
|
|
|
int_status);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
rk_iommu_write(iommu->bases[i], RK_MMU_INT_CLEAR, int_status);
|
|
|
|
}
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2018-03-23 07:38:08 +00:00
|
|
|
clk_bulk_disable(iommu->num_clocks, iommu->clocks);
|
|
|
|
|
2018-03-23 07:38:13 +00:00
|
|
|
out:
|
|
|
|
pm_runtime_put(iommu->dev);
|
2016-01-19 07:03:00 +00:00
|
|
|
return ret;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static phys_addr_t rk_iommu_iova_to_phys(struct iommu_domain *domain,
|
|
|
|
dma_addr_t iova)
|
|
|
|
{
|
2015-03-26 12:43:17 +00:00
|
|
|
struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
unsigned long flags;
|
|
|
|
phys_addr_t pt_phys, phys = 0;
|
|
|
|
u32 dte, pte;
|
|
|
|
u32 *page_table;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&rk_domain->dt_lock, flags);
|
|
|
|
|
|
|
|
dte = rk_domain->dt[rk_iova_dte_index(iova)];
|
|
|
|
if (!rk_dte_is_pt_valid(dte))
|
|
|
|
goto out;
|
|
|
|
|
2021-06-04 16:44:40 +00:00
|
|
|
pt_phys = rk_ops->pt_address(dte);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
page_table = (u32 *)phys_to_virt(pt_phys);
|
|
|
|
pte = page_table[rk_iova_pte_index(iova)];
|
|
|
|
if (!rk_pte_is_page_valid(pte))
|
|
|
|
goto out;
|
|
|
|
|
2021-06-04 16:44:40 +00:00
|
|
|
phys = rk_ops->pt_address(pte) + rk_iova_page_offset(iova);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
out:
|
|
|
|
spin_unlock_irqrestore(&rk_domain->dt_lock, flags);
|
|
|
|
|
|
|
|
return phys;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void rk_iommu_zap_iova(struct rk_iommu_domain *rk_domain,
|
|
|
|
dma_addr_t iova, size_t size)
|
|
|
|
{
|
|
|
|
struct list_head *pos;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
/* shootdown these iova from all iommus using this domain */
|
|
|
|
spin_lock_irqsave(&rk_domain->iommus_lock, flags);
|
|
|
|
list_for_each(pos, &rk_domain->iommus) {
|
|
|
|
struct rk_iommu *iommu;
|
2018-08-24 15:06:36 +00:00
|
|
|
int ret;
|
2018-03-23 07:38:13 +00:00
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
iommu = list_entry(pos, struct rk_iommu, node);
|
2018-03-23 07:38:13 +00:00
|
|
|
|
|
|
|
/* Only zap TLBs of IOMMUs that are powered on. */
|
2018-08-24 15:06:36 +00:00
|
|
|
ret = pm_runtime_get_if_in_use(iommu->dev);
|
|
|
|
if (WARN_ON_ONCE(ret < 0))
|
|
|
|
continue;
|
|
|
|
if (ret) {
|
2018-03-23 07:38:13 +00:00
|
|
|
WARN_ON(clk_bulk_enable(iommu->num_clocks,
|
|
|
|
iommu->clocks));
|
|
|
|
rk_iommu_zap_lines(iommu, iova, size);
|
|
|
|
clk_bulk_disable(iommu->num_clocks, iommu->clocks);
|
|
|
|
pm_runtime_put(iommu->dev);
|
|
|
|
}
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&rk_domain->iommus_lock, flags);
|
|
|
|
}
|
|
|
|
|
2015-04-20 11:43:44 +00:00
|
|
|
static void rk_iommu_zap_iova_first_last(struct rk_iommu_domain *rk_domain,
|
|
|
|
dma_addr_t iova, size_t size)
|
|
|
|
{
|
|
|
|
rk_iommu_zap_iova(rk_domain, iova, SPAGE_SIZE);
|
|
|
|
if (size > SPAGE_SIZE)
|
|
|
|
rk_iommu_zap_iova(rk_domain, iova + size - SPAGE_SIZE,
|
|
|
|
SPAGE_SIZE);
|
|
|
|
}
|
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
static u32 *rk_dte_get_page_table(struct rk_iommu_domain *rk_domain,
|
|
|
|
dma_addr_t iova)
|
|
|
|
{
|
|
|
|
u32 *page_table, *dte_addr;
|
2016-06-24 02:13:29 +00:00
|
|
|
u32 dte_index, dte;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
phys_addr_t pt_phys;
|
2016-06-24 02:13:29 +00:00
|
|
|
dma_addr_t pt_dma;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
assert_spin_locked(&rk_domain->dt_lock);
|
|
|
|
|
2016-06-24 02:13:29 +00:00
|
|
|
dte_index = rk_iova_dte_index(iova);
|
|
|
|
dte_addr = &rk_domain->dt[dte_index];
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
dte = *dte_addr;
|
|
|
|
if (rk_dte_is_pt_valid(dte))
|
|
|
|
goto done;
|
|
|
|
|
|
|
|
page_table = (u32 *)get_zeroed_page(GFP_ATOMIC | GFP_DMA32);
|
|
|
|
if (!page_table)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
|
2018-03-23 07:38:10 +00:00
|
|
|
pt_dma = dma_map_single(dma_dev, page_table, SPAGE_SIZE, DMA_TO_DEVICE);
|
|
|
|
if (dma_mapping_error(dma_dev, pt_dma)) {
|
|
|
|
dev_err(dma_dev, "DMA mapping error while allocating page table\n");
|
2016-06-24 02:13:29 +00:00
|
|
|
free_page((unsigned long)page_table);
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
}
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2021-06-04 16:44:40 +00:00
|
|
|
dte = rk_ops->mk_dtentries(pt_dma);
|
2016-06-24 02:13:29 +00:00
|
|
|
*dte_addr = dte;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-06-24 02:13:29 +00:00
|
|
|
rk_table_flush(rk_domain,
|
|
|
|
rk_domain->dt_dma + dte_index * sizeof(u32), 1);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
done:
|
2021-06-04 16:44:40 +00:00
|
|
|
pt_phys = rk_ops->pt_address(dte);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
return (u32 *)phys_to_virt(pt_phys);
|
|
|
|
}
|
|
|
|
|
|
|
|
static size_t rk_iommu_unmap_iova(struct rk_iommu_domain *rk_domain,
|
2016-06-24 02:13:29 +00:00
|
|
|
u32 *pte_addr, dma_addr_t pte_dma,
|
|
|
|
size_t size)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
|
|
|
unsigned int pte_count;
|
|
|
|
unsigned int pte_total = size / SPAGE_SIZE;
|
|
|
|
|
|
|
|
assert_spin_locked(&rk_domain->dt_lock);
|
|
|
|
|
|
|
|
for (pte_count = 0; pte_count < pte_total; pte_count++) {
|
|
|
|
u32 pte = pte_addr[pte_count];
|
|
|
|
if (!rk_pte_is_page_valid(pte))
|
|
|
|
break;
|
|
|
|
|
|
|
|
pte_addr[pte_count] = rk_mk_pte_invalid(pte);
|
|
|
|
}
|
|
|
|
|
2016-06-24 02:13:29 +00:00
|
|
|
rk_table_flush(rk_domain, pte_dma, pte_count);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
return pte_count * SPAGE_SIZE;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rk_iommu_map_iova(struct rk_iommu_domain *rk_domain, u32 *pte_addr,
|
2016-06-24 02:13:29 +00:00
|
|
|
dma_addr_t pte_dma, dma_addr_t iova,
|
|
|
|
phys_addr_t paddr, size_t size, int prot)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
|
|
|
unsigned int pte_count;
|
|
|
|
unsigned int pte_total = size / SPAGE_SIZE;
|
|
|
|
phys_addr_t page_phys;
|
|
|
|
|
|
|
|
assert_spin_locked(&rk_domain->dt_lock);
|
|
|
|
|
|
|
|
for (pte_count = 0; pte_count < pte_total; pte_count++) {
|
|
|
|
u32 pte = pte_addr[pte_count];
|
|
|
|
|
|
|
|
if (rk_pte_is_page_valid(pte))
|
|
|
|
goto unwind;
|
|
|
|
|
2021-06-04 16:44:40 +00:00
|
|
|
pte_addr[pte_count] = rk_ops->mk_ptentries(paddr, prot);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
paddr += SPAGE_SIZE;
|
|
|
|
}
|
|
|
|
|
2016-06-24 02:13:29 +00:00
|
|
|
rk_table_flush(rk_domain, pte_dma, pte_total);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2015-04-20 11:43:44 +00:00
|
|
|
/*
|
|
|
|
* Zap the first and last iova to evict from iotlb any previously
|
|
|
|
* mapped cachelines holding stale values for its dte and pte.
|
|
|
|
* We only zap the first and last iova, since only they could have
|
|
|
|
* dte or pte shared with an existing mapping.
|
|
|
|
*/
|
|
|
|
rk_iommu_zap_iova_first_last(rk_domain, iova, size);
|
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
return 0;
|
|
|
|
unwind:
|
|
|
|
/* Unmap the range of iovas that we just mapped */
|
2016-06-24 02:13:29 +00:00
|
|
|
rk_iommu_unmap_iova(rk_domain, pte_addr, pte_dma,
|
|
|
|
pte_count * SPAGE_SIZE);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
iova += pte_count * SPAGE_SIZE;
|
2021-06-04 16:44:40 +00:00
|
|
|
page_phys = rk_ops->pt_address(pte_addr[pte_count]);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
pr_err("iova: %pad already mapped to %pa cannot remap to phys: %pa prot: %#x\n",
|
|
|
|
&iova, &page_phys, &paddr, prot);
|
|
|
|
|
|
|
|
return -EADDRINUSE;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rk_iommu_map(struct iommu_domain *domain, unsigned long _iova,
|
2019-09-08 16:56:38 +00:00
|
|
|
phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
2015-03-26 12:43:17 +00:00
|
|
|
struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
unsigned long flags;
|
2016-06-24 02:13:29 +00:00
|
|
|
dma_addr_t pte_dma, iova = (dma_addr_t)_iova;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
u32 *page_table, *pte_addr;
|
2016-06-24 02:13:29 +00:00
|
|
|
u32 dte_index, pte_index;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&rk_domain->dt_lock, flags);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* pgsize_bitmap specifies iova sizes that fit in one page table
|
|
|
|
* (1024 4-KiB pages = 4 MiB).
|
|
|
|
* So, size will always be 4096 <= size <= 4194304.
|
|
|
|
* Since iommu_map() guarantees that both iova and size will be
|
|
|
|
* aligned, we will always only be mapping from a single dte here.
|
|
|
|
*/
|
|
|
|
page_table = rk_dte_get_page_table(rk_domain, iova);
|
|
|
|
if (IS_ERR(page_table)) {
|
|
|
|
spin_unlock_irqrestore(&rk_domain->dt_lock, flags);
|
|
|
|
return PTR_ERR(page_table);
|
|
|
|
}
|
|
|
|
|
2016-06-24 02:13:29 +00:00
|
|
|
dte_index = rk_domain->dt[rk_iova_dte_index(iova)];
|
|
|
|
pte_index = rk_iova_pte_index(iova);
|
|
|
|
pte_addr = &page_table[pte_index];
|
2021-06-04 16:44:40 +00:00
|
|
|
|
|
|
|
pte_dma = rk_ops->pt_address(dte_index) + pte_index * sizeof(u32);
|
2016-06-24 02:13:29 +00:00
|
|
|
ret = rk_iommu_map_iova(rk_domain, pte_addr, pte_dma, iova,
|
|
|
|
paddr, size, prot);
|
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
spin_unlock_irqrestore(&rk_domain->dt_lock, flags);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static size_t rk_iommu_unmap(struct iommu_domain *domain, unsigned long _iova,
|
2019-07-02 15:44:06 +00:00
|
|
|
size_t size, struct iommu_iotlb_gather *gather)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
2015-03-26 12:43:17 +00:00
|
|
|
struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
unsigned long flags;
|
2016-06-24 02:13:29 +00:00
|
|
|
dma_addr_t pte_dma, iova = (dma_addr_t)_iova;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
phys_addr_t pt_phys;
|
|
|
|
u32 dte;
|
|
|
|
u32 *pte_addr;
|
|
|
|
size_t unmap_size;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&rk_domain->dt_lock, flags);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* pgsize_bitmap specifies iova sizes that fit in one page table
|
|
|
|
* (1024 4-KiB pages = 4 MiB).
|
|
|
|
* So, size will always be 4096 <= size <= 4194304.
|
|
|
|
* Since iommu_unmap() guarantees that both iova and size will be
|
|
|
|
* aligned, we will always only be unmapping from a single dte here.
|
|
|
|
*/
|
|
|
|
dte = rk_domain->dt[rk_iova_dte_index(iova)];
|
|
|
|
/* Just return 0 if iova is unmapped */
|
|
|
|
if (!rk_dte_is_pt_valid(dte)) {
|
|
|
|
spin_unlock_irqrestore(&rk_domain->dt_lock, flags);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2021-06-04 16:44:40 +00:00
|
|
|
pt_phys = rk_ops->pt_address(dte);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
pte_addr = (u32 *)phys_to_virt(pt_phys) + rk_iova_pte_index(iova);
|
2016-06-24 02:13:29 +00:00
|
|
|
pte_dma = pt_phys + rk_iova_pte_index(iova) * sizeof(u32);
|
|
|
|
unmap_size = rk_iommu_unmap_iova(rk_domain, pte_addr, pte_dma, size);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
spin_unlock_irqrestore(&rk_domain->dt_lock, flags);
|
|
|
|
|
|
|
|
/* Shootdown iotlb entries for iova range that was just unmapped */
|
|
|
|
rk_iommu_zap_iova(rk_domain, iova, unmap_size);
|
|
|
|
|
|
|
|
return unmap_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct rk_iommu *rk_iommu_from_dev(struct device *dev)
|
|
|
|
{
|
2020-06-25 13:08:28 +00:00
|
|
|
struct rk_iommudata *data = dev_iommu_priv_get(dev);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2018-03-23 07:38:11 +00:00
|
|
|
return data ? data->iommu : NULL;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
2018-03-23 07:38:13 +00:00
|
|
|
/* Must be called with iommu powered on and attached */
|
|
|
|
static void rk_iommu_disable(struct rk_iommu *iommu)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
2018-03-23 07:38:13 +00:00
|
|
|
int i;
|
|
|
|
|
|
|
|
/* Ignore error while disabling, just keep going */
|
|
|
|
WARN_ON(clk_bulk_enable(iommu->num_clocks, iommu->clocks));
|
|
|
|
rk_iommu_enable_stall(iommu);
|
|
|
|
rk_iommu_disable_paging(iommu);
|
|
|
|
for (i = 0; i < iommu->num_mmu; i++) {
|
|
|
|
rk_iommu_write(iommu->bases[i], RK_MMU_INT_MASK, 0);
|
|
|
|
rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR, 0);
|
|
|
|
}
|
|
|
|
rk_iommu_disable_stall(iommu);
|
|
|
|
clk_bulk_disable(iommu->num_clocks, iommu->clocks);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Must be called with iommu powered on and attached */
|
|
|
|
static int rk_iommu_enable(struct rk_iommu *iommu)
|
|
|
|
{
|
|
|
|
struct iommu_domain *domain = iommu->domain;
|
2015-03-26 12:43:17 +00:00
|
|
|
struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
|
2016-01-19 07:03:00 +00:00
|
|
|
int ret, i;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2018-03-23 07:38:08 +00:00
|
|
|
ret = clk_bulk_enable(iommu->num_clocks, iommu->clocks);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
2018-03-23 07:38:08 +00:00
|
|
|
ret = rk_iommu_enable_stall(iommu);
|
|
|
|
if (ret)
|
|
|
|
goto out_disable_clocks;
|
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
ret = rk_iommu_force_reset(iommu);
|
|
|
|
if (ret)
|
2018-03-23 07:38:04 +00:00
|
|
|
goto out_disable_stall;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-01-19 07:03:00 +00:00
|
|
|
for (i = 0; i < iommu->num_mmu; i++) {
|
2016-06-24 02:13:29 +00:00
|
|
|
rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR,
|
2021-06-04 16:44:40 +00:00
|
|
|
rk_ops->dma_addr_dte(rk_domain->dt_dma));
|
2016-06-01 15:46:10 +00:00
|
|
|
rk_iommu_base_command(iommu->bases[i], RK_MMU_CMD_ZAP_CACHE);
|
2016-01-19 07:03:00 +00:00
|
|
|
rk_iommu_write(iommu->bases[i], RK_MMU_INT_MASK, RK_MMU_IRQ_MASK);
|
|
|
|
}
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
ret = rk_iommu_enable_paging(iommu);
|
|
|
|
|
2018-03-23 07:38:04 +00:00
|
|
|
out_disable_stall:
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
rk_iommu_disable_stall(iommu);
|
2018-03-23 07:38:08 +00:00
|
|
|
out_disable_clocks:
|
|
|
|
clk_bulk_disable(iommu->num_clocks, iommu->clocks);
|
2018-03-23 07:38:04 +00:00
|
|
|
return ret;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void rk_iommu_detach_device(struct iommu_domain *domain,
|
|
|
|
struct device *dev)
|
|
|
|
{
|
|
|
|
struct rk_iommu *iommu;
|
2015-03-26 12:43:17 +00:00
|
|
|
struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
unsigned long flags;
|
2018-08-24 15:06:36 +00:00
|
|
|
int ret;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
/* Allow 'virtual devices' (eg drm) to detach from domain */
|
|
|
|
iommu = rk_iommu_from_dev(dev);
|
|
|
|
if (!iommu)
|
|
|
|
return;
|
|
|
|
|
2018-03-23 07:38:13 +00:00
|
|
|
dev_dbg(dev, "Detaching from iommu domain\n");
|
|
|
|
|
|
|
|
/* iommu already detached */
|
|
|
|
if (iommu->domain != domain)
|
|
|
|
return;
|
|
|
|
|
|
|
|
iommu->domain = NULL;
|
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
spin_lock_irqsave(&rk_domain->iommus_lock, flags);
|
|
|
|
list_del_init(&iommu->node);
|
|
|
|
spin_unlock_irqrestore(&rk_domain->iommus_lock, flags);
|
|
|
|
|
2018-08-24 15:06:36 +00:00
|
|
|
ret = pm_runtime_get_if_in_use(iommu->dev);
|
|
|
|
WARN_ON_ONCE(ret < 0);
|
|
|
|
if (ret > 0) {
|
2018-03-23 07:38:13 +00:00
|
|
|
rk_iommu_disable(iommu);
|
|
|
|
pm_runtime_put(iommu->dev);
|
2016-01-19 07:03:00 +00:00
|
|
|
}
|
2018-03-23 07:38:13 +00:00
|
|
|
}
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2018-03-23 07:38:13 +00:00
|
|
|
static int rk_iommu_attach_device(struct iommu_domain *domain,
|
|
|
|
struct device *dev)
|
|
|
|
{
|
|
|
|
struct rk_iommu *iommu;
|
|
|
|
struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
|
|
|
|
unsigned long flags;
|
|
|
|
int ret;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2018-03-23 07:38:13 +00:00
|
|
|
/*
|
|
|
|
* Allow 'virtual devices' (e.g., drm) to attach to domain.
|
|
|
|
* Such a device does not belong to an iommu group.
|
|
|
|
*/
|
|
|
|
iommu = rk_iommu_from_dev(dev);
|
|
|
|
if (!iommu)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
dev_dbg(dev, "Attaching to iommu domain\n");
|
|
|
|
|
|
|
|
/* iommu already attached */
|
|
|
|
if (iommu->domain == domain)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (iommu->domain)
|
|
|
|
rk_iommu_detach_device(iommu->domain, dev);
|
|
|
|
|
|
|
|
iommu->domain = domain;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&rk_domain->iommus_lock, flags);
|
|
|
|
list_add_tail(&iommu->node, &rk_domain->iommus);
|
|
|
|
spin_unlock_irqrestore(&rk_domain->iommus_lock, flags);
|
|
|
|
|
2018-08-24 15:06:36 +00:00
|
|
|
ret = pm_runtime_get_if_in_use(iommu->dev);
|
|
|
|
if (!ret || WARN_ON_ONCE(ret < 0))
|
2018-03-23 07:38:13 +00:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
ret = rk_iommu_enable(iommu);
|
|
|
|
if (ret)
|
|
|
|
rk_iommu_detach_device(iommu->domain, dev);
|
|
|
|
|
|
|
|
pm_runtime_put(iommu->dev);
|
|
|
|
|
|
|
|
return ret;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
2015-03-26 12:43:17 +00:00
|
|
|
static struct iommu_domain *rk_iommu_domain_alloc(unsigned type)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
|
|
|
struct rk_iommu_domain *rk_domain;
|
|
|
|
|
2016-06-24 02:13:30 +00:00
|
|
|
if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA)
|
2015-03-26 12:43:17 +00:00
|
|
|
return NULL;
|
|
|
|
|
2018-03-23 07:38:10 +00:00
|
|
|
if (!dma_dev)
|
2015-03-26 12:43:17 +00:00
|
|
|
return NULL;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2019-10-02 17:29:23 +00:00
|
|
|
rk_domain = kzalloc(sizeof(*rk_domain), GFP_KERNEL);
|
2016-06-24 02:13:29 +00:00
|
|
|
if (!rk_domain)
|
2018-03-23 07:38:10 +00:00
|
|
|
return NULL;
|
2016-06-24 02:13:29 +00:00
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
/*
|
|
|
|
* rk32xx iommus use a 2 level pagetable.
|
|
|
|
* Each level1 (dt) and level2 (pt) table has 1024 4-byte entries.
|
|
|
|
* Allocate one 4 KiB page for each table.
|
|
|
|
*/
|
|
|
|
rk_domain->dt = (u32 *)get_zeroed_page(GFP_KERNEL | GFP_DMA32);
|
|
|
|
if (!rk_domain->dt)
|
2021-08-11 12:21:22 +00:00
|
|
|
goto err_free_domain;
|
2016-06-24 02:13:29 +00:00
|
|
|
|
2018-03-23 07:38:10 +00:00
|
|
|
rk_domain->dt_dma = dma_map_single(dma_dev, rk_domain->dt,
|
2016-06-24 02:13:29 +00:00
|
|
|
SPAGE_SIZE, DMA_TO_DEVICE);
|
2018-03-23 07:38:10 +00:00
|
|
|
if (dma_mapping_error(dma_dev, rk_domain->dt_dma)) {
|
|
|
|
dev_err(dma_dev, "DMA map error for DT\n");
|
2016-06-24 02:13:29 +00:00
|
|
|
goto err_free_dt;
|
|
|
|
}
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
spin_lock_init(&rk_domain->iommus_lock);
|
|
|
|
spin_lock_init(&rk_domain->dt_lock);
|
|
|
|
INIT_LIST_HEAD(&rk_domain->iommus);
|
|
|
|
|
2016-06-24 02:13:30 +00:00
|
|
|
rk_domain->domain.geometry.aperture_start = 0;
|
|
|
|
rk_domain->domain.geometry.aperture_end = DMA_BIT_MASK(32);
|
|
|
|
rk_domain->domain.geometry.force_aperture = true;
|
|
|
|
|
2015-03-26 12:43:17 +00:00
|
|
|
return &rk_domain->domain;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-06-24 02:13:29 +00:00
|
|
|
err_free_dt:
|
|
|
|
free_page((unsigned long)rk_domain->dt);
|
2019-10-02 17:29:23 +00:00
|
|
|
err_free_domain:
|
|
|
|
kfree(rk_domain);
|
2016-06-24 02:13:29 +00:00
|
|
|
|
2015-03-26 12:43:17 +00:00
|
|
|
return NULL;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
2015-03-26 12:43:17 +00:00
|
|
|
static void rk_iommu_domain_free(struct iommu_domain *domain)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
2015-03-26 12:43:17 +00:00
|
|
|
struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
int i;
|
|
|
|
|
|
|
|
WARN_ON(!list_empty(&rk_domain->iommus));
|
|
|
|
|
|
|
|
for (i = 0; i < NUM_DT_ENTRIES; i++) {
|
|
|
|
u32 dte = rk_domain->dt[i];
|
|
|
|
if (rk_dte_is_pt_valid(dte)) {
|
2021-06-04 16:44:40 +00:00
|
|
|
phys_addr_t pt_phys = rk_ops->pt_address(dte);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
u32 *page_table = phys_to_virt(pt_phys);
|
2018-03-23 07:38:10 +00:00
|
|
|
dma_unmap_single(dma_dev, pt_phys,
|
2016-06-24 02:13:29 +00:00
|
|
|
SPAGE_SIZE, DMA_TO_DEVICE);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
free_page((unsigned long)page_table);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2018-03-23 07:38:10 +00:00
|
|
|
dma_unmap_single(dma_dev, rk_domain->dt_dma,
|
2016-06-24 02:13:29 +00:00
|
|
|
SPAGE_SIZE, DMA_TO_DEVICE);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
free_page((unsigned long)rk_domain->dt);
|
2016-06-24 02:13:29 +00:00
|
|
|
|
2019-10-02 17:29:23 +00:00
|
|
|
kfree(rk_domain);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
2020-04-29 13:37:03 +00:00
|
|
|
static struct iommu_device *rk_iommu_probe_device(struct device *dev)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
2018-03-23 07:38:13 +00:00
|
|
|
struct rk_iommudata *data;
|
2020-04-29 13:37:03 +00:00
|
|
|
struct rk_iommu *iommu;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2020-06-25 13:08:28 +00:00
|
|
|
data = dev_iommu_priv_get(dev);
|
2018-03-23 07:38:13 +00:00
|
|
|
if (!data)
|
2020-04-29 13:37:03 +00:00
|
|
|
return ERR_PTR(-ENODEV);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2018-03-23 07:38:13 +00:00
|
|
|
iommu = rk_iommu_from_dev(dev);
|
|
|
|
|
2019-02-01 00:54:21 +00:00
|
|
|
data->link = device_link_add(dev, iommu->dev,
|
|
|
|
DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2020-04-29 13:37:03 +00:00
|
|
|
return &iommu->iommu;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
2020-04-29 13:37:03 +00:00
|
|
|
static void rk_iommu_release_device(struct device *dev)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
2020-06-25 13:08:28 +00:00
|
|
|
struct rk_iommudata *data = dev_iommu_priv_get(dev);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2018-03-23 07:38:13 +00:00
|
|
|
device_link_del(data->link);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
2018-03-23 07:38:14 +00:00
|
|
|
static struct iommu_group *rk_iommu_device_group(struct device *dev)
|
|
|
|
{
|
|
|
|
struct rk_iommu *iommu;
|
|
|
|
|
|
|
|
iommu = rk_iommu_from_dev(dev);
|
|
|
|
|
|
|
|
return iommu_group_ref_get(iommu->group);
|
|
|
|
}
|
|
|
|
|
2018-03-23 07:38:11 +00:00
|
|
|
static int rk_iommu_of_xlate(struct device *dev,
|
|
|
|
struct of_phandle_args *args)
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{
|
2018-03-23 07:38:11 +00:00
|
|
|
struct platform_device *iommu_dev;
|
|
|
|
struct rk_iommudata *data;
|
2017-03-31 14:26:03 +00:00
|
|
|
|
2018-03-23 07:38:11 +00:00
|
|
|
data = devm_kzalloc(dma_dev, sizeof(*data), GFP_KERNEL);
|
|
|
|
if (!data)
|
|
|
|
return -ENOMEM;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2018-03-23 07:38:11 +00:00
|
|
|
iommu_dev = of_find_device_by_node(args->np);
|
2017-03-31 14:26:03 +00:00
|
|
|
|
2018-03-23 07:38:11 +00:00
|
|
|
data->iommu = platform_get_drvdata(iommu_dev);
|
2020-06-25 13:08:28 +00:00
|
|
|
dev_iommu_priv_set(dev, data);
|
2018-03-23 07:38:11 +00:00
|
|
|
|
2018-04-04 10:23:53 +00:00
|
|
|
platform_device_put(iommu_dev);
|
2018-03-23 07:38:11 +00:00
|
|
|
|
|
|
|
return 0;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static const struct iommu_ops rk_iommu_ops = {
|
2015-03-26 12:43:17 +00:00
|
|
|
.domain_alloc = rk_iommu_domain_alloc,
|
|
|
|
.domain_free = rk_iommu_domain_free,
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
.attach_dev = rk_iommu_attach_device,
|
|
|
|
.detach_dev = rk_iommu_detach_device,
|
|
|
|
.map = rk_iommu_map,
|
|
|
|
.unmap = rk_iommu_unmap,
|
2020-04-29 13:37:03 +00:00
|
|
|
.probe_device = rk_iommu_probe_device,
|
|
|
|
.release_device = rk_iommu_release_device,
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
.iova_to_phys = rk_iommu_iova_to_phys,
|
2018-03-23 07:38:14 +00:00
|
|
|
.device_group = rk_iommu_device_group,
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
.pgsize_bitmap = RK_IOMMU_PGSIZE_BITMAP,
|
2018-03-23 07:38:11 +00:00
|
|
|
.of_xlate = rk_iommu_of_xlate,
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
static int rk_iommu_probe(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct device *dev = &pdev->dev;
|
|
|
|
struct rk_iommu *iommu;
|
|
|
|
struct resource *res;
|
2021-06-04 16:44:40 +00:00
|
|
|
const struct rk_iommu_ops *ops;
|
2016-06-24 02:13:28 +00:00
|
|
|
int num_res = pdev->num_resources;
|
2019-09-25 18:43:46 +00:00
|
|
|
int err, i;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
|
|
|
iommu = devm_kzalloc(dev, sizeof(*iommu), GFP_KERNEL);
|
|
|
|
if (!iommu)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
platform_set_drvdata(pdev, iommu);
|
|
|
|
iommu->dev = dev;
|
2016-01-19 07:03:00 +00:00
|
|
|
iommu->num_mmu = 0;
|
2016-06-24 02:13:28 +00:00
|
|
|
|
2021-06-04 16:44:40 +00:00
|
|
|
ops = of_device_get_match_data(dev);
|
|
|
|
if (!rk_ops)
|
|
|
|
rk_ops = ops;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* That should not happen unless different versions of the
|
|
|
|
* hardware block are embedded the same SoC
|
|
|
|
*/
|
|
|
|
if (WARN_ON(rk_ops != ops))
|
|
|
|
return -EINVAL;
|
|
|
|
|
treewide: devm_kzalloc() -> devm_kcalloc()
The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc().
This patch replaces cases of:
devm_kzalloc(handle, a * b, gfp)
with:
devm_kcalloc(handle, a * b, gfp)
as well as handling cases of:
devm_kzalloc(handle, a * b * c, gfp)
with:
devm_kzalloc(handle, array3_size(a, b, c), gfp)
as it's slightly less ugly than:
devm_kcalloc(handle, array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
devm_kzalloc(handle, 4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
Some manual whitespace fixes were needed in this patch, as Coccinelle
really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...".
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
expression HANDLE;
type TYPE;
expression THING, E;
@@
(
devm_kzalloc(HANDLE,
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
devm_kzalloc(HANDLE,
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression HANDLE;
expression COUNT;
typedef u8;
typedef __u8;
@@
(
devm_kzalloc(HANDLE,
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(char) * COUNT
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
expression HANDLE;
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
expression HANDLE;
identifier SIZE, COUNT;
@@
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression HANDLE;
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
devm_kzalloc(HANDLE,
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression HANDLE;
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
devm_kzalloc(HANDLE,
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
expression HANDLE;
identifier STRIDE, SIZE, COUNT;
@@
(
devm_kzalloc(HANDLE,
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression HANDLE;
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
devm_kzalloc(HANDLE,
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
devm_kzalloc(HANDLE,
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
devm_kzalloc(HANDLE,
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
devm_kzalloc(HANDLE,
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression HANDLE;
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
devm_kzalloc(HANDLE, sizeof(THING) * C2, ...)
|
devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...)
|
devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
devm_kzalloc(HANDLE, C1 * C2, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- (E1) * E2
+ E1, E2
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- (E1) * (E2)
+ E1, E2
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 21:07:58 +00:00
|
|
|
iommu->bases = devm_kcalloc(dev, num_res, sizeof(*iommu->bases),
|
2016-01-19 07:03:00 +00:00
|
|
|
GFP_KERNEL);
|
|
|
|
if (!iommu->bases)
|
|
|
|
return -ENOMEM;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2016-06-24 02:13:28 +00:00
|
|
|
for (i = 0; i < num_res; i++) {
|
2016-01-19 07:03:00 +00:00
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, i);
|
2016-03-21 11:00:23 +00:00
|
|
|
if (!res)
|
|
|
|
continue;
|
2016-01-19 07:03:00 +00:00
|
|
|
iommu->bases[i] = devm_ioremap_resource(&pdev->dev, res);
|
|
|
|
if (IS_ERR(iommu->bases[i]))
|
|
|
|
continue;
|
|
|
|
iommu->num_mmu++;
|
|
|
|
}
|
|
|
|
if (iommu->num_mmu == 0)
|
|
|
|
return PTR_ERR(iommu->bases[0]);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
|
2019-09-25 18:43:46 +00:00
|
|
|
iommu->num_irq = platform_irq_count(pdev);
|
|
|
|
if (iommu->num_irq < 0)
|
|
|
|
return iommu->num_irq;
|
|
|
|
|
2017-07-24 02:37:15 +00:00
|
|
|
iommu->reset_disabled = device_property_read_bool(dev,
|
|
|
|
"rockchip,disable-mmu-reset");
|
|
|
|
|
2018-03-23 07:38:08 +00:00
|
|
|
iommu->num_clocks = ARRAY_SIZE(rk_iommu_clocks);
|
|
|
|
iommu->clocks = devm_kcalloc(iommu->dev, iommu->num_clocks,
|
|
|
|
sizeof(*iommu->clocks), GFP_KERNEL);
|
|
|
|
if (!iommu->clocks)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
for (i = 0; i < iommu->num_clocks; ++i)
|
|
|
|
iommu->clocks[i].id = rk_iommu_clocks[i];
|
|
|
|
|
2018-04-17 12:09:15 +00:00
|
|
|
/*
|
|
|
|
* iommu clocks should be present for all new devices and devicetrees
|
|
|
|
* but there are older devicetrees without clocks out in the wild.
|
|
|
|
* So clocks as optional for the time being.
|
|
|
|
*/
|
2018-03-23 07:38:08 +00:00
|
|
|
err = devm_clk_bulk_get(iommu->dev, iommu->num_clocks, iommu->clocks);
|
2018-04-17 12:09:15 +00:00
|
|
|
if (err == -ENOENT)
|
|
|
|
iommu->num_clocks = 0;
|
|
|
|
else if (err)
|
2018-03-23 07:38:08 +00:00
|
|
|
return err;
|
|
|
|
|
|
|
|
err = clk_bulk_prepare(iommu->num_clocks, iommu->clocks);
|
2017-03-31 14:26:03 +00:00
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
2018-03-23 07:38:14 +00:00
|
|
|
iommu->group = iommu_group_alloc();
|
|
|
|
if (IS_ERR(iommu->group)) {
|
|
|
|
err = PTR_ERR(iommu->group);
|
|
|
|
goto err_unprepare_clocks;
|
|
|
|
}
|
|
|
|
|
2018-03-23 07:38:08 +00:00
|
|
|
err = iommu_device_sysfs_add(&iommu->iommu, dev, NULL, dev_name(dev));
|
|
|
|
if (err)
|
2018-03-23 07:38:14 +00:00
|
|
|
goto err_put_group;
|
2018-03-23 07:38:08 +00:00
|
|
|
|
2021-04-01 13:56:26 +00:00
|
|
|
err = iommu_device_register(&iommu->iommu, &rk_iommu_ops, dev);
|
2018-03-23 07:38:02 +00:00
|
|
|
if (err)
|
2018-03-23 07:38:08 +00:00
|
|
|
goto err_remove_sysfs;
|
2017-03-31 14:26:03 +00:00
|
|
|
|
2018-03-23 07:38:10 +00:00
|
|
|
/*
|
|
|
|
* Use the first registered IOMMU device for domain to use with DMA
|
|
|
|
* API, since a domain might not physically correspond to a single
|
|
|
|
* IOMMU device..
|
|
|
|
*/
|
|
|
|
if (!dma_dev)
|
|
|
|
dma_dev = &pdev->dev;
|
|
|
|
|
2018-03-23 07:38:12 +00:00
|
|
|
bus_set_iommu(&platform_bus_type, &rk_iommu_ops);
|
|
|
|
|
2018-03-23 07:38:13 +00:00
|
|
|
pm_runtime_enable(dev);
|
|
|
|
|
2019-09-25 18:43:46 +00:00
|
|
|
for (i = 0; i < iommu->num_irq; i++) {
|
|
|
|
int irq = platform_get_irq(pdev, i);
|
|
|
|
|
2018-08-24 15:06:37 +00:00
|
|
|
if (irq < 0)
|
|
|
|
return irq;
|
|
|
|
|
|
|
|
err = devm_request_irq(iommu->dev, irq, rk_iommu_irq,
|
|
|
|
IRQF_SHARED, dev_name(dev), iommu);
|
|
|
|
if (err) {
|
|
|
|
pm_runtime_disable(dev);
|
|
|
|
goto err_remove_sysfs;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-06-04 16:44:40 +00:00
|
|
|
dma_set_mask_and_coherent(dev, rk_ops->dma_bit_mask);
|
|
|
|
|
2018-03-23 07:38:08 +00:00
|
|
|
return 0;
|
|
|
|
err_remove_sysfs:
|
|
|
|
iommu_device_sysfs_remove(&iommu->iommu);
|
2018-03-23 07:38:14 +00:00
|
|
|
err_put_group:
|
|
|
|
iommu_group_put(iommu->group);
|
2018-03-23 07:38:08 +00:00
|
|
|
err_unprepare_clocks:
|
|
|
|
clk_bulk_unprepare(iommu->num_clocks, iommu->clocks);
|
2017-03-31 14:26:03 +00:00
|
|
|
return err;
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
|
2018-02-20 20:25:04 +00:00
|
|
|
static void rk_iommu_shutdown(struct platform_device *pdev)
|
|
|
|
{
|
2018-08-27 10:56:24 +00:00
|
|
|
struct rk_iommu *iommu = platform_get_drvdata(pdev);
|
2019-09-25 18:43:46 +00:00
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < iommu->num_irq; i++) {
|
|
|
|
int irq = platform_get_irq(pdev, i);
|
2018-08-27 10:56:24 +00:00
|
|
|
|
|
|
|
devm_free_irq(iommu->dev, irq, iommu);
|
2019-09-25 18:43:46 +00:00
|
|
|
}
|
2018-08-27 10:56:24 +00:00
|
|
|
|
2018-03-23 07:38:13 +00:00
|
|
|
pm_runtime_force_suspend(&pdev->dev);
|
|
|
|
}
|
2018-02-20 20:25:04 +00:00
|
|
|
|
2018-03-23 07:38:13 +00:00
|
|
|
static int __maybe_unused rk_iommu_suspend(struct device *dev)
|
|
|
|
{
|
|
|
|
struct rk_iommu *iommu = dev_get_drvdata(dev);
|
|
|
|
|
|
|
|
if (!iommu->domain)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
rk_iommu_disable(iommu);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __maybe_unused rk_iommu_resume(struct device *dev)
|
|
|
|
{
|
|
|
|
struct rk_iommu *iommu = dev_get_drvdata(dev);
|
|
|
|
|
|
|
|
if (!iommu->domain)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return rk_iommu_enable(iommu);
|
2018-02-20 20:25:04 +00:00
|
|
|
}
|
|
|
|
|
2018-03-23 07:38:13 +00:00
|
|
|
static const struct dev_pm_ops rk_iommu_pm_ops = {
|
|
|
|
SET_RUNTIME_PM_OPS(rk_iommu_suspend, rk_iommu_resume, NULL)
|
|
|
|
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
|
|
|
|
pm_runtime_force_resume)
|
|
|
|
};
|
|
|
|
|
2021-06-04 16:44:40 +00:00
|
|
|
static struct rk_iommu_ops iommu_data_ops_v1 = {
|
|
|
|
.pt_address = &rk_dte_pt_address,
|
|
|
|
.mk_dtentries = &rk_mk_dte,
|
|
|
|
.mk_ptentries = &rk_mk_pte,
|
|
|
|
.dte_addr_phys = &rk_dte_addr_phys,
|
|
|
|
.dma_addr_dte = &rk_dma_addr_dte,
|
|
|
|
.dma_bit_mask = DMA_BIT_MASK(32),
|
|
|
|
};
|
|
|
|
|
2021-06-04 16:44:41 +00:00
|
|
|
static struct rk_iommu_ops iommu_data_ops_v2 = {
|
|
|
|
.pt_address = &rk_dte_pt_address_v2,
|
|
|
|
.mk_dtentries = &rk_mk_dte_v2,
|
|
|
|
.mk_ptentries = &rk_mk_pte_v2,
|
|
|
|
.dte_addr_phys = &rk_dte_addr_phys_v2,
|
|
|
|
.dma_addr_dte = &rk_dma_addr_dte_v2,
|
|
|
|
.dma_bit_mask = DMA_BIT_MASK(40),
|
|
|
|
};
|
2021-06-04 16:44:40 +00:00
|
|
|
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
static const struct of_device_id rk_iommu_dt_ids[] = {
|
2021-06-04 16:44:40 +00:00
|
|
|
{ .compatible = "rockchip,iommu",
|
|
|
|
.data = &iommu_data_ops_v1,
|
|
|
|
},
|
2021-06-04 16:44:41 +00:00
|
|
|
{ .compatible = "rockchip,rk3568-iommu",
|
|
|
|
.data = &iommu_data_ops_v2,
|
|
|
|
},
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
{ /* sentinel */ }
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct platform_driver rk_iommu_driver = {
|
|
|
|
.probe = rk_iommu_probe,
|
2018-02-20 20:25:04 +00:00
|
|
|
.shutdown = rk_iommu_shutdown,
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
.driver = {
|
|
|
|
.name = "rk_iommu",
|
2015-04-10 21:58:24 +00:00
|
|
|
.of_match_table = rk_iommu_dt_ids,
|
2018-03-23 07:38:13 +00:00
|
|
|
.pm = &rk_iommu_pm_ops,
|
2018-03-23 07:38:01 +00:00
|
|
|
.suppress_bind_attrs = true,
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init rk_iommu_init(void)
|
|
|
|
{
|
2018-03-23 07:38:10 +00:00
|
|
|
return platform_driver_register(&rk_iommu_driver);
|
iommu/rockchip: rk3288 iommu driver
The rk3288 has several iommus. Each iommu belongs to a single master
device. There is one device (ISP) that has two slave iommus, but that
case is not yet supported by this driver.
At subsys init, the iommu driver registers itself as the iommu driver for
the platform bus. The master devices find their slave iommus using the
"iommus" field in their devicetree description. Since each slave iommu
belongs to exactly one master, their is no additional data needed at probe
to associate a slave with its master.
An iommu device's power domain, clock and irq are all shared with its
master device, and the master device must be careful to attach from the
iommu only after powering and clocking it (and leave it powered and
clocked before detaching). Because their is no guarantee what the status
of the iommu is at probe, and since the driver does not even know if the
device is powered, we delay requesting its irq until the master device
attaches, at which point we have a guarantee that the device is powered
and clocked and we can reset it and disable its interrupt mask.
An iommu_domain describes a virtual iova address space. Each iommu_domain
has a corresponding page table that lists the mappings from iova to
physical address.
For the rk3288 iommu, the page table has two levels:
The Level 1 "directory_table" has 1024 4-byte dte entries.
Each dte points to a level 2 "page_table".
Each level 2 page_table has 1024 4-byte pte entries.
Each pte points to a 4 KiB page of memory.
An iommu_domain is created when a dma_iommu_mapping is created via
arm_iommu_create_mapping. Master devices can then attach themselves to
this mapping (or attach the mapping to themselves?) by calling
arm_iommu_attach_device(). This in turn instructs the iommu driver to
write the page table's physical address into the slave iommu's "Directory
Table Entry" (DTE) register.
In fact multiple master devices, each with their own slave iommu device,
can all attach to the same mapping. The iommus for these devices will
share the same iommu_domain and therefore point to the same page table.
Thus, the iommu domain maintains a list of iommu devices which are
attached. This driver relies on the iommu core to ensure that all devices
have detached before destroying a domain.
v6: - add .add/remove_device() callbacks.
- parse platform_device device tree nodes for "iommus" property
- store platform device pointer as group iommudata
- Check for existence of iommu group instead of relying on a
dev_get_drvdata() to return NULL for a NULL device.
v7: - fixup some strings.
- In rk_iommu_disable_paging() # and % were reversed.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-03 02:53:27 +00:00
|
|
|
}
|
|
|
|
subsys_initcall(rk_iommu_init);
|