linux-toradex.git/include/linux/dmaengine.h, branch v6.16-rc6 Linux kernel for Apalis and Colibri modules dmaengine: Remove device_prep_dma_imm_data from struct dma_device 2025-03-10T21:02:00+00:00 Nathan Lynch nathan.lynch@amd.com 2025-02-10T23:29:11+00:00 b9014a10bdb8e967d85819f5ef61e6f80d0b46c9 The device_prep_dma_imm_data() method isn't implemented or invoked by any code since commit 80ade22c06ca ("misc: mic: remove the MIC drivers"). Remove it, shrinking struct dma_device by a few bytes. Signed-off-by: Nathan Lynch <nathan.lynch@amd.com> Link: https://lore.kernel.org/r/20250210-dmaengine-drop-imm-data-v1-1-e017766da2fa@amd.com Signed-off-by: Vinod Koul <vkoul@kernel.org> 
The device_prep_dma_imm_data() method isn't implemented or invoked by
any code since commit 80ade22c06ca ("misc: mic: remove the MIC drivers").

Remove it, shrinking struct dma_device by a few bytes.

Signed-off-by: Nathan Lynch <nathan.lynch@amd.com>
Link: https://lore.kernel.org/r/20250210-dmaengine-drop-imm-data-v1-1-e017766da2fa@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
dmaengine: Use dma_request_channel() instead of __dma_request_channel() 2025-02-10T10:58:53+00:00 Andy Shevchenko andriy.shevchenko@linux.intel.com 2025-02-05T14:57:10+00:00 1c83d3dfa0905590408595560629627cba4f9261 Reduce use of internal __dma_request_channel() function in public dmaengine.h. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20250205145757.889247-3-andriy.shevchenko@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org> 
Reduce use of internal __dma_request_channel() function in public
dmaengine.h.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20250205145757.889247-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
dmaengine: Replace dma_request_slave_channel() by dma_request_chan() 2025-02-10T10:58:53+00:00 Andy Shevchenko andriy.shevchenko@linux.intel.com 2025-02-05T14:57:09+00:00 31d43141d13aa63587f140884b1f667800ce4e1d Replace dma_request_slave_channel() by dma_request_chan() as suggested since the former is deprecated. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20250205145757.889247-2-andriy.shevchenko@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org> 
Replace dma_request_slave_channel() by dma_request_chan() as suggested
since the former is deprecated.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20250205145757.889247-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
linux/dmaengine.h: fix a few kernel-doc warnings 2024-12-04T12:11:25+00:00 Randy Dunlap rdunlap@infradead.org 2024-12-02T17:20:04+00:00 790fb9956eead785b720ccc0851f09a5ca3a093e The comment block for "Interleaved Transfer Request" should not begin with "/**" since it is not in kernel-doc format. Fix doc name for enum sum_check_flags. Fix all (4) missing struct member warnings. Use "Warning:" for one "Note:" in enum dma_desc_metadata_mode since scripts/kernel-doc does not allow more than one Note: per function or identifier description. This leaves around 49 kernel-doc warnings like: include/linux/dmaengine.h:43: warning: Enum value 'DMA_OUT_OF_ORDER' not described in enum 'dma_status' and another scripts/kernel-doc problem with it not being able to parse some typedefs. Fixes: b14dab792dee ("DMAEngine: Define interleaved transfer request api") Fixes: ad283ea4a3ce ("async_tx: add sum check flags") Fixes: 272420214d26 ("dmaengine: Add DMA_CTRL_REUSE") Fixes: f067025bc676 ("dmaengine: add support to provide error result from a DMA transation") Fixes: d38a8c622a1b ("dmaengine: prepare for generic 'unmap' data") Fixes: 5878853fc938 ("dmaengine: Add API function dmaengine_prep_peripheral_dma_vec()") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Paul Cercueil <paul@crapouillou.net> Cc: Nuno Sa <nuno.sa@analog.com> Cc: Vinod Koul <vkoul@kernel.org> Cc: dmaengine@vger.kernel.org Link: https://lore.kernel.org/r/20241202172004.76020-1-rdunlap@infradead.org Signed-off-by: Vinod Koul <vkoul@kernel.org> 
The comment block for "Interleaved Transfer Request" should not begin
with "/**" since it is not in kernel-doc format.

Fix doc name for enum sum_check_flags.

Fix all (4) missing struct member warnings.

Use "Warning:" for one "Note:" in enum dma_desc_metadata_mode since
scripts/kernel-doc does not allow more than one Note:
per function or identifier description.

This leaves around 49 kernel-doc warnings like:
  include/linux/dmaengine.h:43: warning: Enum value 'DMA_OUT_OF_ORDER' not described in enum 'dma_status'

and another scripts/kernel-doc problem with it not being able to parse
some typedefs.

Fixes: b14dab792dee ("DMAEngine: Define interleaved transfer request api")
Fixes: ad283ea4a3ce ("async_tx: add sum check flags")
Fixes: 272420214d26 ("dmaengine: Add DMA_CTRL_REUSE")
Fixes: f067025bc676 ("dmaengine: add support to provide error result from a DMA transation")
Fixes: d38a8c622a1b ("dmaengine: prepare for generic 'unmap' data")
Fixes: 5878853fc938 ("dmaengine: Add API function dmaengine_prep_peripheral_dma_vec()")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Paul Cercueil <paul@crapouillou.net>
Cc: Nuno Sa <nuno.sa@analog.com>
Cc: Vinod Koul <vkoul@kernel.org>
Cc: dmaengine@vger.kernel.org
Link: https://lore.kernel.org/r/20241202172004.76020-1-rdunlap@infradead.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Merge tag 'dmaengine_topic_dma_vec' into next 2024-06-21T10:10:55+00:00 Vinod Koul vkoul@kernel.org 2024-06-21T10:10:55+00:00 73115d8068b6ed59e9d728bb9067462084f02a25 Dmaengine topic - New device_prep_peripheral_dma_vec, documentation and user 
Dmaengine topic
 - New device_prep_peripheral_dma_vec, documentation and user
dmaengine: Add API function dmaengine_prep_peripheral_dma_vec() 2024-06-21T10:01:56+00:00 Paul Cercueil paul@crapouillou.net 2024-06-20T12:27:20+00:00 5878853fc9389e7d0988d4b465a415cf96fd14fa This function can be used to initiate a scatter-gather DMA transfer, where the address and size of each segment is located in one entry of the dma_vec array. The major difference with dmaengine_prep_slave_sg() is that it supports specifying the lengths of each DMA transfer; as trying to override the length of the transfer with dmaengine_prep_slave_sg() is a very tedious process. The introduction of a new API function is also justified by the fact that scatterlists are on their way out. Note that dmaengine_prep_interleaved_dma() is not helpful either in that case, as it assumes that the address of each segment will be higher than the one of the previous segment, which we just cannot guarantee in case of a scatter-gather transfer. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Co-developed-by: Nuno Sa <nuno.sa@analog.com> Signed-off-by: Nuno Sa <nuno.sa@analog.com> Link: https://lore.kernel.org/r/20240620122726.41232-2-paul@crapouillou.net Signed-off-by: Vinod Koul <vkoul@kernel.org> 
This function can be used to initiate a scatter-gather DMA transfer,
where the address and size of each segment is located in one entry of
the dma_vec array.

The major difference with dmaengine_prep_slave_sg() is that it supports
specifying the lengths of each DMA transfer; as trying to override the
length of the transfer with dmaengine_prep_slave_sg() is a very tedious
process. The introduction of a new API function is also justified by the
fact that scatterlists are on their way out.

Note that dmaengine_prep_interleaved_dma() is not helpful either in that
case, as it assumes that the address of each segment will be higher than
the one of the previous segment, which we just cannot guarantee in case
of a scatter-gather transfer.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Co-developed-by: Nuno Sa <nuno.sa@analog.com>
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240620122726.41232-2-paul@crapouillou.net
Signed-off-by: Vinod Koul <vkoul@kernel.org>
dmaengine: add channel device name to channel registration 2024-06-11T18:25:34+00:00 Amelie Delaunay amelie.delaunay@foss.st.com 2024-05-31T15:07:10+00:00 10b8e0fd3f7234a38db2c8d2c8dec0bd6eeede44 Channel device name is used for sysfs, but also by dmatest filter function. With dynamic channel registration, channels can be registered after dma controller registration. Users may want to have specific channel names. If name is NULL, the channel name relies on previous implementation, dma<controller_device_id>chan<channel_device_id>. Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20240531150712.2503554-11-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org> 
Channel device name is used for sysfs, but also by dmatest filter function.

With dynamic channel registration, channels can be registered after dma
controller registration. Users may want to have specific channel names.

If name is NULL, the channel name relies on previous implementation,
dma<controller_device_id>chan<channel_device_id>.

Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20240531150712.2503554-11-amelie.delaunay@foss.st.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
dmaengine: fix is_slave_direction() return false when DMA_DEV_TO_DEV 2024-01-30T16:41:13+00:00 Frank Li Frank.Li@nxp.com 2024-01-23T17:28:41+00:00 a22fe1d6dec7e98535b97249fdc95c2be79120bb is_slave_direction() should return true when direction is DMA_DEV_TO_DEV. Fixes: 49920bc66984 ("dmaengine: add new enum dma_transfer_direction") Signed-off-by: Frank Li <Frank.Li@nxp.com> Link: https://lore.kernel.org/r/20240123172842.3764529-1-Frank.Li@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org> 
is_slave_direction() should return true when direction is DMA_DEV_TO_DEV.

Fixes: 49920bc66984 ("dmaengine: add new enum dma_transfer_direction")
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20240123172842.3764529-1-Frank.Li@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
dmaengine: Remove unused declaration dma_chan_cleanup() 2023-10-04T13:55:30+00:00 Yue Haibing yuehaibing@huawei.com 2023-08-09T08:00:12+00:00 09361abc346102c505657db4f3ae19ed70e1b703 Commit f27c580c3628 ("dmaengine: remove 'bigref' infrastructure") removed the implementation but left declaration in place. Remove it. Signed-off-by: Yue Haibing <yuehaibing@huawei.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20230809080012.22000-1-yuehaibing@huawei.com Signed-off-by: Vinod Koul <vkoul@kernel.org> 
Commit f27c580c3628 ("dmaengine: remove 'bigref' infrastructure")
removed the implementation but left declaration in place. Remove it.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230809080012.22000-1-yuehaibing@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Merge tag 'dmaengine-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine 2023-02-25T01:18:54+00:00 Linus Torvalds torvalds@linux-foundation.org 2023-02-25T01:18:54+00:00 9e6bfd42b14b45737cae8bc84c759f1874949b8b Pull dmaengine updates from Vinod Koul: "A new driver, couple of device support and binding conversion along with bunch of driver updates are the main features of this. New hardware support: - TI AM62Ax controller support - Xilinx xdma driver - Qualcomm SM6125, SM8550, QDU1000/QRU1000 GPI controller Updates: - Runtime pm support for at_xdmac driver - IMX sdma binding conversion to yaml and HDMI audio support - IMX mxs binding conversion to yaml" * tag 'dmaengine-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (35 commits) dmaengine: idma64: Update bytes_transferred field dmaengine: imx-sdma: Set DMA channel to be private dmaengine: dw: Move check for paused channel to dwc_get_residue() dmaengine: ptdma: check for null desc before calling pt_cmd_callback dmaengine: dw-axi-dmac: Do not dereference NULL structure dmaengine: idxd: Fix default allowed read buffers value in group dmaengine: sf-pdma: pdma_desc memory leak fix dmaengine: Simplify dmaenginem_async_device_register() function dmaengine: use sysfs_emit() to instead of scnprintf() dmaengine: Make an order in struct dma_device definition dt-bindings: dma: cleanup examples - indentation, lowercase hex dt-bindings: dma: drop unneeded quotes dmaengine: xilinx: xdma: Add user logic interrupt support dmaengine: xilinx: xdma: Add xilinx xdma driver dmaengine: drivers: Use devm_platform_ioremap_resource() dmaengine: at_xdmac: remove empty line dmaengine: at_xdmac: add runtime pm support dmaengine: at_xdmac: align properly function members dmaengine: ppc4xx: Convert to use sysfs_emit()/sysfs_emit_at() APIs dmaengine: sun6i: Set the maximum segment size ... 
Pull dmaengine updates from Vinod Koul:
 "A new driver, couple of device support and binding conversion along
  with bunch of driver updates are the main features of this.

  New hardware support:

   - TI AM62Ax controller support

   - Xilinx xdma driver

   - Qualcomm SM6125, SM8550, QDU1000/QRU1000 GPI controller

  Updates:

   - Runtime pm support for at_xdmac driver

   - IMX sdma binding conversion to yaml and HDMI audio support

   - IMX mxs binding conversion to yaml"

* tag 'dmaengine-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (35 commits)
  dmaengine: idma64: Update bytes_transferred field
  dmaengine: imx-sdma: Set DMA channel to be private
  dmaengine: dw: Move check for paused channel to dwc_get_residue()
  dmaengine: ptdma: check for null desc before calling pt_cmd_callback
  dmaengine: dw-axi-dmac: Do not dereference NULL structure
  dmaengine: idxd: Fix default allowed read buffers value in group
  dmaengine: sf-pdma: pdma_desc memory leak fix
  dmaengine: Simplify dmaenginem_async_device_register() function
  dmaengine: use sysfs_emit() to instead of scnprintf()
  dmaengine: Make an order in struct dma_device definition
  dt-bindings: dma: cleanup examples - indentation, lowercase hex
  dt-bindings: dma: drop unneeded quotes
  dmaengine: xilinx: xdma: Add user logic interrupt support
  dmaengine: xilinx: xdma: Add xilinx xdma driver
  dmaengine: drivers: Use devm_platform_ioremap_resource()
  dmaengine: at_xdmac: remove empty line
  dmaengine: at_xdmac: add runtime pm support
  dmaengine: at_xdmac: align properly function members
  dmaengine: ppc4xx: Convert to use sysfs_emit()/sysfs_emit_at() APIs
  dmaengine: sun6i: Set the maximum segment size
  ...