Commit graph

153 commits

Author SHA1 Message Date
Vinod Koul
2577394f4b dmaengine_topic_slave_id_removal_5.17
Tag for dmaengine slave_id removal topic branch which should be merged
 into v5.17
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Merge tag 'dmaengine_topic_slave_id_removal_5.17' into next

Merge the tag dmaengine_topic_slave_id_removal_5.17 into next. This
brings in the slave_id removal topic changes
2021-12-17 21:42:17 +05:30
Lars-Peter Clausen
f17e53388e dmaengine: xilinx: Handle IRQ mapping errors
Handle errors when trying to map the IRQ for the DMA channels.

The main motivation here is to be able to handle probe deferral. E.g. when
using DT overlays it is possible that the DMA controller is probed before
interrupt controller, depending on the order in the DT.

In order to support this switch from irq_of_parse_and_map() to
of_irq_get(), which internally does the same, but it will return
EPROBE_DEFER when the interrupt controller is not yet available.

As a result other errors, such as an invalid IRQ specification, or missing
IRQ are also properly handled.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/20211208114212.234130-1-lars@metafoo.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-12-17 21:39:26 +05:30
Arnd Bergmann
93cdb5b0dc dmaengine: xilinx_dpdma: stop using slave_id field
The display driver wants to pass a custom flag to the DMA engine driver,
which it started doing by using the slave_id field that was traditionally
used for a different purpose.

As there is no longer a correct use for the slave_id field, it should
really be removed, and the remaining users changed over to something
different.

The new mechanism for passing nonstandard settings is using the
.peripheral_config field, so use that to pass a newly defined structure
here, making it clear that this will not work in portable drivers.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20211122222203.4103644-10-arnd@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-12-17 11:23:56 +05:30
Adrian Larumbe
29cf37fa6d dmaengine: Add consumer for the new DMA_MEMCPY_SG API function.
This new CDMA binding for device_prep_dma_memcpy_sg was partially borrowed
from xlnx kernel tree, an expanded with extended address space support when
linking descriptor segments and checking for incorrect zero transfer size.

Signed-off-by: Adrian Larumbe <adrianml@alumnos.upm.es>
Link: https://lore.kernel.org/r/20211101180825.241048-4-adrianml@alumnos.upm.es
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-11-22 11:38:05 +05:30
Lars-Peter Clausen
1825ecc908 dmaengine: zynqmp_dma: Correctly handle descriptor callbacks
DMA clients can provide one of two types of callbacks. For this reason
dmaengine drivers should not directly invoke `callback`, but always use
`dmaengine_desc_callback_invoke()`. This makes sure that both types of
callbacks are handled correctly.

The zynqmp_dma driver currently doesn't do this and only handles the
`callback` type callback. If the client used the `callback_result` type
callback it will not be called.

Fix this by switching to `dmaengine_desc_callback_valid()` and
`dmaengine_desc_callback_invoke()`.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211025075428.2094-3-lars@metafoo.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-10-28 22:53:54 +05:30
Lars-Peter Clausen
a63ddc3857 dmaengine: xilinx_dma: Correctly handle cyclic descriptor callbacks
DMA clients can provide one of two types of callbacks. For this reason
dmaengine drivers should not directly invoke `callback`, but always use
`dmaengine_desc_callback_invoke()`. This makes sure that both types of
callbacks are handled correctly.

The xilinx_dma driver currently doesn't do this for cyclic descriptors and
only handles the `callback` type callback. If the client used the
`callback_result` type callback it will not be called.

Fix this by switching to `dmaengine_desc_callback_valid()` and
`dmaengine_desc_callback_invoke()`.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211025075428.2094-2-lars@metafoo.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-10-28 22:53:54 +05:30
Shravya Kumbham
dbe3c54e71 dmaengine: xilinx_dma: Fix kernel-doc warnings
Modify the prototype from xilinx_dma_tx_descriptor to
xilinx_dma_alloc_tx_descriptor and xilinx_dma_channel_set_config
to xilinx_vdma_channel_set_config in API description to
fix below linux kernel-doc warnings.

drivers/dma/xilinx/xilinx_dma.c:800: warning: expecting
prototype for xilinx_dma_tx_descriptor(). Prototype was
for xilinx_dma_alloc_tx_descriptor() instead.

drivers/dma/xilinx/xilinx_dma.c:2471: warning: expecting
prototype for xilinx_dma_channel_set_config(). Prototype
was for xilinx_vdma_channel_set_config() instead.

Signed-off-by: Shravya Kumbham <shravya.kumbham@xilinx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1631525316-2323-1-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-10-25 12:09:15 +05:30
Arnd Bergmann
b3b180e735 dmaengine: remove debugfs #ifdef
The ptdma driver has added debugfs support, but this fails to build
when debugfs is disabled:

drivers/dma/ptdma/ptdma-debugfs.c: In function 'ptdma_debugfs_setup':
drivers/dma/ptdma/ptdma-debugfs.c:93:54: error: 'struct dma_device' has no member named 'dbg_dev_root'
   93 |         debugfs_create_file("info", 0400, pt->dma_dev.dbg_dev_root, pt,
      |                                                      ^
drivers/dma/ptdma/ptdma-debugfs.c:96:55: error: 'struct dma_device' has no member named 'dbg_dev_root'
   96 |         debugfs_create_file("stats", 0400, pt->dma_dev.dbg_dev_root, pt,
      |                                                       ^
drivers/dma/ptdma/ptdma-debugfs.c:102:52: error: 'struct dma_device' has no member named 'dbg_dev_root'
  102 |                 debugfs_create_dir("q", pt->dma_dev.dbg_dev_root);
      |                                                    ^

Remove the #ifdef in the header, as this only saves a few bytes,
but would require ugly #ifdefs in each driver using it.
Simplify the other user while we're at it.

Fixes: e2fb2e2a33 ("dmaengine: ptdma: Add debugfs entries for PTDMA")
Fixes: 26cf132de6 ("dmaengine: Create debug directories for DMA devices")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20210920122017.205975-1-arnd@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-10-25 12:01:14 +05:30
Michael Tretter
9558cf4ad0 dmaengine: zynqmp_dma: fix lockdep warning in tasklet
The tasklet that handles the completed dma transfers uses spin_unlock
for unlocking a spin lock that was previously locked with
spin_lock_irqsave.

This caused the following lockdep warning about an inconsistent lock
state:

	inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.

We must use spin_lock_irqsave, because it is possible to queue DMA
transfers from an irq handler.

Replace the spin_unlock and spin_lock by spin_unlock_irqrestore and
spin_lock_irqsave.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Link: https://lore.kernel.org/r/20210826094742.1302009-8-m.tretter@pengutronix.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-10-01 17:26:30 +05:30
Michael Tretter
193a750df5 dmaengine: zynqmp_dma: refine dma descriptor locking
The descriptor lists are locked for the entire tasklet that completes
the descriptors. This is not necessary, because the lock actually only
protects the descriptor lists.

Make the spin lock more fine-grained and only protect functions that
actually operate on the descriptor lists. This decreases the time when
the lock is held.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Link: https://lore.kernel.org/r/20210826094742.1302009-7-m.tretter@pengutronix.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-10-01 17:26:30 +05:30
Michael Tretter
16ed0ef3e9 dmaengine: zynqmp_dma: cleanup after completing all descriptors
The current implementation iterates the entire done list for each
completed dma descriptor even if there are multiple completed
descriptors.

Avoid this by first moving all completed descriptors to the done list
and afterwards iterating the done list and finishing the descriptors.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Link: https://lore.kernel.org/r/20210826094742.1302009-6-m.tretter@pengutronix.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-10-01 17:26:30 +05:30
Michael Tretter
85997fdfd1 dmaengine: zynqmp_dma: cleanup includes
The driver includes a few headers that are not actually used, but are
probably copy paste errors. Remove them.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Link: https://lore.kernel.org/r/20210826094742.1302009-5-m.tretter@pengutronix.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-10-01 17:26:30 +05:30
Michael Tretter
4c0f93eb80 dmaengine: zynqmp_dma: drop message on probe success
There is no need to print a message that the ZynqMP DMA driver probed
successfully, since it carries no additional information. Drop the
message.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Link: https://lore.kernel.org/r/20210826094742.1302009-3-m.tretter@pengutronix.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-10-01 17:26:30 +05:30
Michael Tretter
5637abaab9 dmaengine: zynqmp_dma: simplify with dev_err_probe
The clocks are provided by the ZynqMP firmware driver and are deferred
until the firmware driver has probed. This leads to misleading error
messages during probe of the zynqmp_dma driver.

Use dev_err_probe for printing errors during probe to avoid error
messages for -EPROBE_DEFER.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Link: https://lore.kernel.org/r/20210826094742.1302009-2-m.tretter@pengutronix.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-10-01 17:26:30 +05:30
Radhey Shyam Pandey
aac6c0f907 dmaengine: xilinx_dma: Set DMA mask for coherent APIs
The xilinx dma driver uses the consistent allocations, so for correct
operation also set the DMA mask for coherent APIs. It fixes the below
kernel crash with dmatest client when DMA IP is configured with 64-bit
address width and linux is booted from high (>4GB) memory.

Call trace:
[  489.531257]  dma_alloc_from_pool+0x8c/0x1c0
[  489.535431]  dma_direct_alloc+0x284/0x330
[  489.539432]  dma_alloc_attrs+0x80/0xf0
[  489.543174]  dma_pool_alloc+0x160/0x2c0
[  489.547003]  xilinx_cdma_prep_memcpy+0xa4/0x180
[  489.551524]  dmatest_func+0x3cc/0x114c
[  489.555266]  kthread+0x124/0x130
[  489.558486]  ret_from_fork+0x10/0x3c
[  489.562051] ---[ end trace 248625b2d596a90a ]---

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Reviewed-by: Harini Katakam <harini.katakam@xilinx.com>
Link: https://lore.kernel.org/r/1629363528-30347-1-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-29 19:14:19 +05:30
Marek Vasut
4153a7f644 dmaengine: xilinx: Add empty device_config function
Various DMA users call the dmaengine_slave_config() and expect it to
succeed, but that can only succeed if .device_config is implemented.
Add empty device_config function rather than patching all the places
which use dmaengine_slave_config().

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Kedareswara rao Appana <appana.durga.rao@xilinx.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20210804195140.61396-1-marex@denx.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-06 19:21:16 +05:30
Baokun Li
48594dbf79 dmaengine: zynqmp_dma: Use list_move_tail instead of list_del/list_add_tail
Using list_move_tail() instead of list_del() + list_add_tail().

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Link: https://lore.kernel.org/r/20210609071349.1336853-1-libaokun1@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28 12:06:22 +05:30
Baokun Li
75ba9a715c dmaengine: xilinx_dma: Use list_move_tail instead of list_del/list_add_tail
Using list_move_tail() instead of list_del() + list_add_tail().

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/20210608030905.2818831-1-libaokun1@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-28 12:05:06 +05:30
Adrian Larumbe
7dd2dd4ff9 dmaengine: xilinx_dma: Fix read-after-free bug when terminating transfers
When user calls dmaengine_terminate_sync, the driver will clean up any
remaining descriptors for all the pending or active transfers that had
previously been submitted. However, this might happen whilst the tasklet is
invoking the DMA callback for the last finished transfer, so by the time it
returns and takes over the channel's spinlock, the list of completed
descriptors it was traversing is no longer valid. This leads to a
read-after-free situation.

Fix it by signalling whether a user-triggered termination has happened by
means of a boolean variable.

Signed-off-by: Adrian Larumbe <adrian.martinezlarumbe@imgtec.com>
Link: https://lore.kernel.org/r/20210706234338.7696-3-adrian.martinezlarumbe@imgtec.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-07-14 10:39:34 +05:30
Linus Torvalds
18ef082713 dmaengine updates for v5.14-rc1
New drivers/devices
  - Support for QCOM SM8250 GPI DMA
  - removal of shdma-of driver and binding
 
 Updates:
  - arm-pl08x yaml binding move
  - altera-msgdma gained DT support
  - removal of imx-sdma platform data support
  - idxd and xilinx driver updates
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Merge tag 'dmaengine-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine

Pull dmaengine updates from Vinod Koul:
 "This time around we have a smaller pull request than usual and this
  includes code removal, so should be good!

  New drivers/devices
   - Support for QCOM SM8250 GPI DMA
   - removal of shdma-of driver and binding

  Updates:
   - arm-pl08x yaml binding move
   - altera-msgdma gained DT support
   - removal of imx-sdma platform data support
   - idxd and xilinx driver updates"

* tag 'dmaengine-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (22 commits)
  dmaengine: imx-sdma: Remove platform data header
  dmaengine: xilinx: dpdma: Fix spacing around addr[i-1]
  dmaengine: xilinx: dpdma: Use kernel type u32 over uint32_t
  dmaengine: altera-msgdma: add OF support
  MAINTAINERS: add entry for Altera mSGDMA
  dt-bindings: dma: add schema for altera-msgdma
  dmaengine: xilinx: dpdma: fix kernel-doc
  dmaengine: sf-pdma: apply proper spinlock flags in sf_pdma_prep_dma_memcpy()
  dmaengine: sh: Remove unused shdma-of driver
  dt-bindings: dmaengine: Remove SHDMA Device Tree bindings
  dmaengine: qcom: gpi: Add SM8250 compatible
  dt-bindings: dmaengine: qcom: gpi: add compatible for sm8250
  dmaengine: sun4i: Use list_move_tail instead of list_del/list_add_tail
  dmaengine: ti: omap-dma: Skip pointless cpu_pm context restore on errors
  dmaengine: hsu: Account transferred bytes
  dmaengine: Move kdoc description of struct dma_chan_percpu closer to it
  dmaengine: xilinx: dpdma: Print debug message when losing vsync race
  dmaengine: xilinx: dpdma: Print channel number in kernel log messages
  dt-bindings: dma: convert arm-pl08x to yaml
  dmaengine: idxd: remove devm allocation for idxd->int_handles
  ...
2021-07-05 12:05:13 -07:00
Michal Simek
72cce7dd9f dmaengine: xilinx: dpdma: Fix spacing around addr[i-1]
Use proper spacing for array calculation. Issue is reported by
checkpatch.pl --strict.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/ef7cde6f793bfa6f3dd0a8898bad13b6407479b0.1624446456.git.michal.simek@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-06-24 16:40:04 +05:30
Michal Simek
536bc5e6fd dmaengine: xilinx: dpdma: Use kernel type u32 over uint32_t
Use u32 kernel type instead of uint32_t. Issue is reported by
checkpatch.pl --strict.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/9569008794d519b487348bfeafbfd76c5da5755e.1624446336.git.michal.simek@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-06-24 16:39:51 +05:30
Yang Li
ce939833b8 dmaengine: xilinx: dpdma: fix kernel-doc
Fix function name in xilinx/xilinx_dpdma.c comment to remove
a warning found by kernel-doc.

drivers/dma/xilinx/xilinx_dpdma.c:935: warning: expecting prototype for
xilinx_dpdma_chan_no_ostand(). Prototype was for
xilinx_dpdma_chan_notify_no_ostand() instead.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/1623222893-123227-1-git-send-email-yang.lee@linux.alibaba.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-06-16 16:12:59 +05:30
Laurent Pinchart
4fbf41ce57 dmaengine: xilinx: dpdma: Print debug message when losing vsync race
The hardware retrigger is inherently racy with the vsync interrupt. This
isn't an issue as the hardware provides a way to detect a race loss and
handle it correctly. When debugging issues related to this, it's useful
to get a notification of the race loss. Add a debug message to do so.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Jianqiang Chen <jianqiang.chen@xilinx.com>
Reviewed-by: Jianqiang Chen <jianqiang.chen@xilinx.com>
Link: https://lore.kernel.org/r/20210520152420.23986-4-laurent.pinchart@ideasonboard.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-05-31 09:37:39 +05:30
Laurent Pinchart
3021190192 dmaengine: xilinx: dpdma: Print channel number in kernel log messages
To ease debugging, add the channel number to all kernel log messages
related to a particular channel.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Jianqiang Chen <jianqiang.chen@xilinx.com>
Reviewed-by: Jianqiang Chen <jianqiang.chen@xilinx.com>
Link: https://lore.kernel.org/r/20210520152420.23986-3-laurent.pinchart@ideasonboard.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-05-31 09:37:39 +05:30
Laurent Pinchart
9f007e7b66 dmaengine: xilinx: dpdma: Limit descriptor IDs to 16 bits
While the descriptor ID is stored in a 32-bit field in the hardware
descriptor, only 16 bits are used by the hardware and are reported
through the XILINX_DPDMA_CH_DESC_ID register. Failure to handle the
wrap-around results in a descriptor ID mismatch after 65536 frames. Fix
it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Jianqiang Chen <jianqiang.chen@xilinx.com>
Reviewed-by: Jianqiang Chen <jianqiang.chen@xilinx.com>
Link: https://lore.kernel.org/r/20210520152420.23986-5-laurent.pinchart@ideasonboard.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-05-31 09:37:17 +05:30
Yu Kuai
8982d48af3 dmaengine: zynqmp_dma: Fix PM reference leak in zynqmp_dma_alloc_chan_resourc()
pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20210517081826.1564698-4-yukuai3@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-05-31 09:33:09 +05:30
Quanyang Wang
538ea65a9f dmaengine: xilinx: dpdma: initialize registers before request_irq
In some scenarios (kdump), dpdma hardware irqs has been enabled when
calling request_irq in probe function, and then the dpdma irq handler
xilinx_dpdma_irq_handler is invoked to access xdev->chan[i]. But at
this moment xdev->chan[i] hasn't been initialized.

We should ensure the dpdma controller to be in a consistent and
clean state before further initialization. So add dpdma_hw_init()
to do this.

Furthermore, in xilinx_dpdma_disable_irq, disable all interrupts
instead of error interrupts.

This patch is to fix the kdump kernel crash as below:

[    3.696128] Unable to handle kernel NULL pointer dereference at virtual address 000000000000012c
[    3.696710] xilinx-zynqmp-dpdma fd4c0000.dma-controller: Xilinx DPDMA engine is probed
[    3.704900] Mem abort info:
[    3.704902]   ESR = 0x96000005
[    3.704905]   EC = 0x25: DABT (current EL), IL = 32 bits
[    3.704907]   SET = 0, FnV = 0
[    3.704912]   EA = 0, S1PTW = 0
[    3.713800] ahci-ceva fd0c0000.ahci: supply ahci not found, using dummy regulator
[    3.715585] Data abort info:
[    3.715587]   ISV = 0, ISS = 0x00000005
[    3.715589]   CM = 0, WnR = 0
[    3.715592] [000000000000012c] user address but active_mm is swapper
[    3.715596] Internal error: Oops: 96000005 [#1] SMP
[    3.715599] Modules linked in:
[    3.715608] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.0-12170-g60894882155f-dirty #77
[    3.723937] Hardware name: ZynqMP ZCU102 Rev1.0 (DT)
[    3.723942] pstate: 80000085 (Nzcv daIf -PAN -UAO -TCO BTYPE=--)
[    3.723956] pc : xilinx_dpdma_irq_handler+0x418/0x560
[    3.793049] lr : xilinx_dpdma_irq_handler+0x3d8/0x560
[    3.798089] sp : ffffffc01186bdf0
[    3.801388] x29: ffffffc01186bdf0 x28: ffffffc011836f28
[    3.806692] x27: ffffff8023e0ac80 x26: 0000000000000080
[    3.811996] x25: 0000000008000408 x24: 0000000000000003
[    3.817300] x23: ffffffc01186be70 x22: ffffffc011291740
[    3.822604] x21: 0000000000000000 x20: 0000000008000408
[    3.827908] x19: 0000000000000000 x18: 0000000000000010
[    3.833212] x17: 0000000000000000 x16: 0000000000000000
[    3.838516] x15: 0000000000000000 x14: ffffffc011291740
[    3.843820] x13: ffffffc02eb4d000 x12: 0000000034d4d91d
[    3.849124] x11: 0000000000000040 x10: ffffffc0112d2d48
[    3.854428] x9 : ffffffc0112d2d40 x8 : ffffff8021c00268
[    3.859732] x7 : 0000000000000000 x6 : ffffffc011836000
[    3.865036] x5 : 0000000000000003 x4 : 0000000000000000
[    3.870340] x3 : 0000000000000001 x2 : 0000000000000000
[    3.875644] x1 : 0000000000000000 x0 : 000000000000012c
[    3.880948] Call trace:
[    3.883382]  xilinx_dpdma_irq_handler+0x418/0x560
[    3.888079]  __handle_irq_event_percpu+0x5c/0x178
[    3.892774]  handle_irq_event_percpu+0x34/0x98
[    3.897210]  handle_irq_event+0x44/0xb8
[    3.901030]  handle_fasteoi_irq+0xd0/0x190
[    3.905117]  generic_handle_irq+0x30/0x48
[    3.909111]  __handle_domain_irq+0x64/0xc0
[    3.913192]  gic_handle_irq+0x78/0xa0
[    3.916846]  el1_irq+0xc4/0x180
[    3.919982]  cpuidle_enter_state+0x134/0x2f8
[    3.924243]  cpuidle_enter+0x38/0x50
[    3.927810]  call_cpuidle+0x1c/0x40
[    3.931290]  do_idle+0x20c/0x270
[    3.934502]  cpu_startup_entry+0x28/0x58
[    3.938410]  rest_init+0xbc/0xcc
[    3.941631]  arch_call_rest_init+0x10/0x1c
[    3.945718]  start_kernel+0x51c/0x558

Fixes: 7cbb0c63de ("dmaengine: xilinx: dpdma: Add the Xilinx DisplayPort DMA engine driver")
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Link: https://lore.kernel.org/r/20210430064041.4058180-1-quanyang.wang@windriver.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-05-10 21:40:30 +05:30
Vinod Koul
63606522b9 Merge branch 'fixes' into next 2021-04-20 16:43:43 +05:30
Lars-Peter Clausen
50db2050fa dmaengine: xilinx: Introduce synchronize() callback
The Xilinx dmaengine driver uses a tasklet to process completed
descriptors and execute their callbacks.

Currently consumers of the DMA channel have to no method of synchronization
against this tasklet when using the Xilinx dmaengine drivers. This can lead
to race conditions when the consumer frees resources that are accessed in
the callback before the tasklet has finished running.

It is not enough to just call dmaengine_terminal_all() since on a
multi-processor system the tasklet can run concurrently to it and might
call the callback after dmaengine_terminate_all() has already finished.

To mitigate this issue implement the synchronize() callback for the driver,
which will wait until the tasklet has finished.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20210313125311.4823-1-lars@metafoo.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-03-16 16:15:32 +05:30
Laurent Pinchart
868833fbff dmaengine: xilinx: dpdma: Fix race condition in done IRQ
The active descriptor pointer is accessed from different contexts,
including different interrupt handlers, and its access must be protected
by the channel's lock. This wasn't done in the done IRQ handler. Fix it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20210307040629.29308-3-laurent.pinchart@ideasonboard.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-03-16 16:15:06 +05:30
Laurent Pinchart
1cbd446662 dmaengine: xilinx: dpdma: Fix descriptor issuing on video group
When multiple channels are part of a video group, the transfer is
triggered only when all channels in the group are ready. The logic to do
so is incorrect, as it causes the descriptors for all channels but the
last one in a group to not being pushed to the hardware. Fix it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20210307040629.29308-2-laurent.pinchart@ideasonboard.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-03-16 16:15:06 +05:30
Linus Torvalds
143983e585 dmaengine updates for v5.12-rc1
New drivers/devices
  - Intel LGM SoC DMA driver
  - Actions Semi S500 DMA controller
  - Renesas r8a779a0 dma controller
  - Ingenic JZ4760(B) dma controller
  - Intel KeemBay AxiDMA controller
 
 Removed
  - Coh901318 dma driver
  - Zte zx dma driver
  - Sirfsoc dma driver
 
 Updates:
  - mmp_pdma, mmp_tdma gained module support
  - imx-sdma become modern and dropped platform data support
  - dw-axi driver gained slave and cyclic dma support
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Merge tag 'dmaengine-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine

Pull dmaengine updates from Vinod Koul:
 "We have couple of drivers removed a new driver and bunch of new device
  support and few updates to drivers for this round.

  New drivers/devices:
   - Intel LGM SoC DMA driver
   - Actions Semi S500 DMA controller
   - Renesas r8a779a0 dma controller
   - Ingenic JZ4760(B) dma controller
   - Intel KeemBay AxiDMA controller

  Removed:
   - Coh901318 dma driver
   - Zte zx dma driver
   - Sirfsoc dma driver

  Updates:
   - mmp_pdma, mmp_tdma gained module support
   - imx-sdma become modern and dropped platform data support
   - dw-axi driver gained slave and cyclic dma support"

* tag 'dmaengine-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (58 commits)
  dmaengine: dw-axi-dmac: remove redundant null check on desc
  dmaengine: xilinx_dma: Alloc tx descriptors GFP_NOWAIT
  dmaengine: dw-axi-dmac: Virtually split the linked-list
  dmaengine: dw-axi-dmac: Set constraint to the Max segment size
  dmaengine: dw-axi-dmac: Add Intel KeemBay AxiDMA BYTE and HALFWORD registers
  dmaengine: dw-axi-dmac: Add Intel KeemBay AxiDMA handshake
  dmaengine: dw-axi-dmac: Add Intel KeemBay AxiDMA support
  dmaengine: drivers: Kconfig: add HAS_IOMEM dependency to DW_AXI_DMAC
  dmaengine: dw-axi-dmac: Add Intel KeemBay DMA register fields
  dt-binding: dma: dw-axi-dmac: Add support for Intel KeemBay AxiDMA
  dmaengine: dw-axi-dmac: Support burst residue granularity
  dmaengine: dw-axi-dmac: Support of_dma_controller_register()
  dmaegine: dw-axi-dmac: Support device_prep_dma_cyclic()
  dmaengine: dw-axi-dmac: Support device_prep_slave_sg
  dmaengine: dw-axi-dmac: Add device_config operation
  dmaengine: dw-axi-dmac: Add device_synchronize() callback
  dmaengine: dw-axi-dmac: move dma_pool_create() to alloc_chan_resources()
  dmaengine: dw-axi-dmac: simplify descriptor management
  dt-bindings: dma: Add YAML schemas for dw-axi-dmac
  dmaengine: ti: k3-psil: optimize struct psil_endpoint_config for size
  ...
2021-02-23 15:05:10 -08:00
Richard Fitzgerald
ba61c36920 dmaengine: xilinx_dma: Alloc tx descriptors GFP_NOWAIT
Use GFP_NOWAIT allocation in xilinx_dma_alloc_tx_descriptor().

This is necessary for compatibility with ALSA, which calls
dmaengine_prep_dma_cyclic() from an atomic context.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210129170800.31857-1-rf@opensource.cirrus.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-02-01 15:26:48 +05:30
Shravya Kumbham
2d5efea644 dmaengine: xilinx_dma: fix mixed_enum_type coverity warning
Typecast the fls(width -1) with (enum dmaengine_alignment) in
xilinx_dma_chan_probe function to fix the coverity warning.

Addresses-Coverity: Event mixed_enum_type.
Fixes: 9cd4360de6 ("dma: Add Xilinx AXI Video Direct Memory Access Engine driver support")
Signed-off-by: Shravya Kumbham <shravya.kumbham@xilinx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1608722462-29519-4-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-01-04 18:12:39 +05:30
Shravya Kumbham
faeb0731be dmaengine: xilinx_dma: fix incompatible param warning in _child_probe()
In xilinx_dma_child_probe function, the nr_channels variable is
passed to of_property_read_u32() which expects an u32 return value
pointer. Modify the nr_channels variable type from int to u32 to
fix the incompatible parameter coverity warning.

Addresses-Coverity: Event incompatible_param.
Fixes: 1a9e7a03c7 ("dmaengine: vdma: Add support for mulit-channel dma mode")
Signed-off-by: Shravya Kumbham <shravya.kumbham@xilinx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1608722462-29519-3-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-01-04 18:12:39 +05:30
Shravya Kumbham
99974aedbd dmaengine: xilinx_dma: check dma_async_device_register return value
dma_async_device_register() can return non-zero error code. Add
condition to check the return value of dma_async_device_register
function and handle the error path.

Addresses-Coverity: Event check_return.
Fixes: 9cd4360de6 ("dma: Add Xilinx AXI Video Direct Memory Access Engine driver support")
Signed-off-by: Shravya Kumbham <shravya.kumbham@xilinx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1608722462-29519-2-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-01-04 18:12:39 +05:30
Matthew Murrian
96d5d884f7 dmaengine: xilinx_dma: Fix SG capability check for MCDMA
The SG capability is inherently present with Multichannel DMA operation.
The register used to check for this capability with other DMA driver types
is not defined for MCDMA.

Fixes: 6ccd692bfb ("dmaengine: xilinx_dma: Add Xilinx AXI MCDMA Engine driver support")
Signed-off-by: Matthew Murrian <matthew.murrian@goctsi.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1604473206-32573-4-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-11-09 17:54:22 +05:30
Matthew Murrian
c8ae793299 dmaengine: xilinx_dma: Fix usage of xilinx_aximcdma_tx_segment
Several code sections incorrectly use struct xilinx_axidma_tx_segment
instead of struct xilinx_aximcdma_tx_segment when operating as
Multichannel DMA. As their structures are similar, this just works.

Fixes: 6ccd692bfb ("dmaengine: xilinx_dma: Add Xilinx AXI MCDMA Engine driver support")
Signed-off-by: Matthew Murrian <matthew.murrian@goctsi.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1604473206-32573-3-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-11-09 17:54:22 +05:30
Marc Ferland
0ba2df09f1 dmaengine: xilinx_dma: use readl_poll_timeout_atomic variant
The xilinx_dma_poll_timeout macro is sometimes called while holding a
spinlock (see xilinx_dma_issue_pending() for an example) this means we
shouldn't sleep when polling the dma channel registers. To address it
in xilinx poll timeout macro use readl_poll_timeout_atomic instead of
readl_poll_timeout variant.

Signed-off-by: Marc Ferland <ferlandm@amotus.ca>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Link: https://lore.kernel.org/r/1604473206-32573-2-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-11-09 17:54:22 +05:30
Vinod Koul
2997ced4ec dmaengine: zynqmp_dma: fix kernel-doc style for tasklet
Commit f19a11d40a ("dmaengine: xilinx: convert tasklets to use new
tasklet_setup() API") updated driver to use new tasklet_setup() API but
missed to update the documentation for the tasklet function.

Fixes: f19a11d40a ("dmaengine: xilinx: convert tasklets to use new tasklet_setup() API")
Acked-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/20201007083113.567559-5-vkoul@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-10-08 15:18:46 +05:30
Vinod Koul
d11913f2fb dmaengine: xilinx_dma: fix kernel-doc style for tasklet
Commit f19a11d40a ("dmaengine: xilinx: convert tasklets to use new
tasklet_setup() API") updated driver to use new tasklet_setup() API but
missed to update the documentation for the tasklet function.

Fixes: f19a11d40a ("dmaengine: xilinx: convert tasklets to use new tasklet_setup() API")
Acked-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/20201007083113.567559-4-vkoul@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-10-08 15:18:43 +05:30
Allen Pais
b1839e7c2a dmaengine: xilinx: dpdma: convert tasklets to use new tasklet_setup() API
In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <apais@linux.microsoft.com>
Link: https://lore.kernel.org/r/20201006050458.221329-2-allen.lkml@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-10-07 15:22:09 +05:30
Allen Pais
f19a11d40a dmaengine: xilinx: convert tasklets to use new tasklet_setup() API
In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Link: https://lore.kernel.org/r/20200831103542.305571-33-allen.lkml@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-09-18 12:19:07 +05:30
Krzysztof Kozlowski
b0ef489e2a dmaengine: xilinx: Simplify with dev_err_probe()
Common pattern of handling deferred probe can be simplified with
dev_err_probe().  Less code and the error value gets printed.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200828152637.16903-3-krzk@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-09-03 12:38:59 +05:30
Wei Yongjun
144ceb27d7 dmaengine: xilinx: dpdma: Make symbol 'dpdma_debugfs_reqs' static
The sparse tool complains as follows:

drivers/dma/xilinx/xilinx_dpdma.c:349:37: warning:
 symbol 'dpdma_debugfs_reqs' was not declared. Should it be static?

This variable is not used outside of xilinx_dpdma.c, so this commit
marks it static.

Fixes: 1d220435ca ("dmaengine: xilinx: dpdma: Add debugfs support")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Hyun Kwon <hyun.kwon@xilinx.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20200818112217.43816-1-weiyongjun1@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-08-19 09:54:38 +05:30
Laurent Pinchart
1d220435ca dmaengine: xilinx: dpdma: Add debugfs support
Expose statistics to debugfs when available. This helps debugging issues
with the DPDMA driver.

Signed-off-by: Hyun Kwon <hyun.kwon@xilinx.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20200812171228.9751-1-laurent.pinchart@ideasonboard.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-08-17 11:20:49 +05:30
Laurent Pinchart
bc227385eb dmaengine: xilinx: dpdma: Fix kerneldoc warning
Document the struct xilinx_dpdma_chan desc field to fix a kerneldoc
undocumented member warning (which can be reproduced by compiling with
W=1).

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20200722161747.30048-1-laurent.pinchart@ideasonboard.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-07-22 22:01:13 +05:30
Vinod Koul
ea55b6a349 dmaengine: xilinx: dpdma: add missing kernel doc
xilinx_dpdma_sw_desc_set_dma_addrs() documentation is missing describing
'xdev', so add it

drivers/dma/xilinx/xilinx_dpdma.c:313: warning: Function parameter or
member 'xdev' not described in 'xilinx_dpdma_sw_desc_set_dma_addrs'

Link: https://lore.kernel.org/r/20200718135201.191881-2-vkoul@kernel.org
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-07-22 22:00:51 +05:30
Vinod Koul
1c1df90871 dmaengine: xilinx: dpdma: remove comparison of unsigned expression
xilinx_dpdma_config() channel id is unsigned int and compares with
ZYNQMP_DPDMA_VIDEO0 which is zero, so remove this comparison

drivers/dma/xilinx/xilinx_dpdma.c:1073:15: warning: comparison of
unsigned expression in ‘>= 0’ is always true [-Wtype-limits] if
	(chan->id >= ZYNQMP_DPDMA_VIDEO0 && chan->id <= ZYNQMP_DPDMA_VIDEO2)

Link: https://lore.kernel.org/r/20200718135201.191881-1-vkoul@kernel.org
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-07-22 22:00:19 +05:30