Commit Graph

16 Commits

Author SHA1 Message Date
Joerg Roedel d5e5829715 iommu/fsl: Convert to device_group call-back
Convert the fsl pamu driver to make use of the new
device_group call-back.

Cc: Varun Sethi <Varun.Sethi@freescale.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-10-22 00:00:49 +02:00
Joerg Roedel 8d4bfe40bd iommu/fsl: Make use of domain_alloc and domain_free
Implement domain_alloc and domain_free iommu-ops as a
replacement for domain_init/domain_destroy.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-03-31 15:32:14 +02:00
Emil Medve cd70d4659f iommu/fsl: Various cleanups
Currently a PAMU driver patch is very likely to receive some
checkpatch complaints about the code in the context of the
patch. This patch is an attempt to fix most of that and make
the driver more readable

Also fixed a subset of the sparse and coccinelle reported
issues.

Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-02-03 18:47:18 +01:00
Joerg Roedel b7eb678585 iommu/fsl: Convert to iommu_capable() API function
Cc: Varun Sethi <Varun.Sethi@freescale.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-09-25 15:47:37 +02:00
Varun Sethi 5a9137a66b iommu/fsl: Fix warning resulting from adding PCI device twice
iommu_group_get_for_dev determines the iommu group for the PCI device and adds
the device to the group.

In the PAMU driver we were again adding the device to the same group without checking
if the device already had an iommu group. This resulted in the following warning.

sysfs: cannot create duplicate filename '/devices/ffe200000.pcie/pci0000:00/0000:00:00.0/iommu_group'
------------[ cut here ]------------
WARNING: at fs/sysfs/dir.c:31
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.17.0-rc3-00002-g7505cea-dirty #126
task: c0000001fe0a0000 ti: c0000001fe044000 task.ti: c0000001fe044000
NIP: c00000000018879c LR: c000000000188798 CTR: c00000000001ea50
REGS: c0000001fe047040 TRAP: 0700   Not tainted  (3.17.0-rc3-00002-g7505cea-dirty)
MSR: 0000000080029000 <CE,EE,ME>  CR: 24ad8e22  XER: 20000000
SOFTE: 1
GPR00: c000000000188798 c0000001fe0472c0 c0000000009a52e0 0000000000000065
GPR04: 0000000000000001 0000000000000000 3a30303a00000000 0000000027000000
GPR08: 2f696f6d00000000 c0000000008d3830 c0000000009b3938 c0000000009bb3d0
GPR12: 0000000028ad8e24 c00000000fff4000 c00000000000205c 0000000000000000
GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
GPR20: 0000000000000000 0000000000000000 0000000000000000 c0000000008a4c70
GPR24: c0000000007e9010 c0000001fe0140a8 ffffffffffffffef 0000000000000001
GPR28: c0000001fe22ebb8 c0000000007e9010 c00000000090bf10 c0000001fe220000
NIP [c00000000018879c] .sysfs_warn_dup+0x74/0xa4
LR [c000000000188798] .sysfs_warn_dup+0x70/0xa4
Call Trace:
[c0000001fe0472c0] [c000000000188798] .sysfs_warn_dup+0x70/0xa4 (unreliable)
[c0000001fe047350] [c000000000188d34] .sysfs_do_create_link_sd.clone.2+0x168/0x174
[c0000001fe047400] [c0000000004b3cf8] .iommu_group_add_device+0x78/0x244
[c0000001fe0474b0] [c0000000004b6964] .fsl_pamu_add_device+0x88/0x1a8
[c0000001fe047570] [c0000000004b3960] .iommu_bus_notifier+0xdc/0x15c
[c0000001fe047600] [c000000000059848] .notifier_call_chain+0x8c/0xe8
[c0000001fe0476a0] [c000000000059d04] .__blocking_notifier_call_chain+0x58/0x84
[c0000001fe047750] [c00000000036619c] .device_add+0x464/0x5c8
[c0000001fe047820] [c000000000300ebc] .pci_device_add+0x14c/0x17c
[c0000001fe0478c0] [c000000000300fbc] .pci_scan_single_device+0xd0/0xf4
[c0000001fe047970] [c00000000030104c] .pci_scan_slot+0x6c/0x18c
[c0000001fe047a10] [c00000000030226c] .pci_scan_child_bus+0x40/0x114
[c0000001fe047ac0] [c000000000021974] .pcibios_scan_phb+0x240/0x2c8
[c0000001fe047b70] [c00000000085a970] .pcibios_init+0x64/0xc8
[c0000001fe047c00] [c000000000001884] .do_one_initcall+0xbc/0x224
[c0000001fe047d00] [c000000000852d50] .kernel_init_freeable+0x14c/0x21c
[c0000001fe047db0] [c000000000002078] .kernel_init+0x1c/0xfa4
[c0000001fe047e30] [c000000000000884] .ret_from_kernel_thread+0x58/0xd4
Instruction dump:
7c7f1b79 4182001c 7fe4fb78 7f83e378 38a01000 4bffc905 60000000 7c641b78
e87e8008 7fa5eb78 48482ff5 60000000 <0fe00000> 7fe3fb78 4bf7bd39 60000000

Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-09-05 16:01:46 +02:00
Joerg Roedel 4c5e9d9f0d Merge branches 'x86/vt-d', 'x86/amd', 'arm/omap', 'ppc/pamu', 'arm/smmu', 'arm/exynos' and 'core' into next 2014-07-31 20:29:02 +02:00
Thierry Reding b22f6434cf iommu: Constify struct iommu_ops
This structure is read-only data and should never be modified.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-07 10:36:59 +02:00
Varun Sethi 3170447c1f iommu/fsl: Fix the error condition during iommu group
Earlier PTR_ERR was being returned even if group was set to null.
Now, we explicitly set an ERR_PTR value in case the group  pointer is
NULL.

Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-07 10:30:02 +02:00
Varun Sethi 75f0e4615d iommu/fsl: Fix the device domain attach condition.
Store the domain information for the device, only if it's not already
attached to a domain.

Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-07 10:30:02 +02:00
Varun Sethi d033f48f3a iommu/fsl: Fix PAMU window size check.
is_power_of_2 requires an unsigned long parameter which would
lead to truncation of 64 bit values on 32 bit architectures.

__ffs also expects an unsigned long parameter thus won't work
for 64 bit values on 32 bit architectures.

Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
Tested-by: Emil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-07 10:30:01 +02:00
Chi Pham f683367ebd iommu/fsl: Add void declarations in zero-arg functions.
Added explicit void declarations to zero-argument function headers.
The following coccinelle script was used:
@addvoid@
identifier f;
@@

f(
+ void
 ) { ... }

Signed-off-by: Chi Pham <fempsci@gmail.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-04 13:21:49 +02:00
Fabian Frederick 34df6ab795 iommu/fsl_pamu: Remove unnecessary null test before kfree
Fix checkpatch warning:
WARNING: kfree(NULL) is safe this check is probably not required

Cc: Joerg Roedel <joro@8bytes.org>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: iommu@lists.linux-foundation.org
Cc: devicetree@vger.kernel.org
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-04 13:08:23 +02:00
Alex Williamson 7319eded2e iommu/fsl: Use iommu_group_get_for_dev() for IOMMU groups
Drop custom code and use IOMMU provided grouping support for PCI.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Varun Sethi <varun.sethi@freescale.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-04 12:35:58 +02:00
Yijing Wang b3eb76d175 iommu/fsl_pamu: Use dev_is_pci() to check whether it is pci device
Use PCI standard marco dev_is_pci() instead of directly compare
pci_bus_type to check whether it is pci device.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Acked-by: Varun Sethi <varun.sethi@freescale.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
2014-01-07 15:23:08 +01:00
Joerg Roedel 9ed436621a iommu/fsl: Fix whitespace problems noticed by git-am
Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-08-14 11:42:29 +02:00
Varun Sethi 695093e38c iommu/fsl: Freescale PAMU driver and iommu implementation.
Following is a brief description of the PAMU hardware:
PAMU determines what action to take and whether to authorize the action on
the basis of the memory address, a Logical IO Device Number (LIODN), and
PAACT table (logically) indexed by LIODN and address. Hardware devices which
need to access memory must provide an LIODN in addition to the memory address.

Peripheral Access Authorization and Control Tables (PAACTs) are the primary
data structures used by PAMU. A PAACT is a table of peripheral access
authorization and control entries (PAACE).Each PAACE defines the range of
I/O bus address space that is accessible by the LIOD and the associated access
capabilities.

There are two types of PAACTs: primary PAACT (PPAACT) and secondary PAACT
(SPAACT).A given physical I/O device may be able to act as one or more
independent logical I/O devices (LIODs). Each such logical I/O device is
assigned an identifier called logical I/O device number (LIODN). A LIODN is
allocated a contiguous portion of the I/O bus address space called the DSA window
for performing DSA operations. The DSA window may optionally be divided into
multiple sub-windows, each of which may be used to map to a region in system
storage space. The first sub-window is referred to as the primary sub-window
and the remaining are called secondary sub-windows.

This patch provides the PAMU driver (fsl_pamu.c) and the corresponding IOMMU
API implementation (fsl_pamu_domain.c). The PAMU hardware driver (fsl_pamu.c)
has been derived from the work done by Ashish Kalra and Timur Tabi.

[For iommu group support]
Acked-by: Alex Williamson <alex.williamson@redhat.com>

Signed-off-by: Timur Tabi <timur@tabi.org>
Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-08-14 11:38:34 +02:00