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git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine
Pull dmaengine updates from Vinod Koul:
"A fairly small update for the dmaengine subsystem. This has a new ARM
dmaengine driver and couple of new device support and few driver
changes:
New support:
- Renesas RZ/V2H(P) dma support for r9a09g057
- Arm DMA-350 driver
- Tegra Tegra264 ADMA support
Updates:
- AMD ptdma driver code removal and optimizations
- Freescale edma error interrupt handler support"
* tag 'dmaengine-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (27 commits)
dmaengine: idxd: Remove unused pointer and macro
arm64: dts: renesas: r9a09g057: Add DMAC nodes
dmaengine: sh: rz-dmac: Add RZ/V2H(P) support
dmaengine: sh: rz-dmac: Allow for multiple DMACs
irqchip/renesas-rzv2h: Add rzv2h_icu_register_dma_req()
dt-bindings: dma: rz-dmac: Document RZ/V2H(P) family of SoCs
dt-bindings: dma: rz-dmac: Restrict properties for RZ/A1H
dmaengine: idxd: Narrow the restriction on BATCH to ver. 1 only
dmaengine: ti: Add NULL check in udma_probe()
fsldma: Set correct dma_mask based on hw capability
dmaengine: idxd: Check availability of workqueue allocated by idxd wq driver before using
dmaengine: xilinx_dma: Set dma_device directions
dmaengine: tegra210-adma: Add Tegra264 support
dt-bindings: Document Tegra264 ADMA support
dmaengine: dw-edma: Add HDMA NATIVE map check
dmaegnine: fsl-edma: add edma error interrupt handler
dt-bindings: dma: fsl-edma: increase maxItems of interrupts and interrupt-names
dmaengine: ARM_DMA350 should depend on ARM/ARM64
dt-bindings: dma: qcom,bam: Document dma-coherent property
dmaengine: Add Arm DMA-350 driver
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remove redundancy
The variable is dereferenced without first checking if it's null, leading
to the following warning: 'Variable dereferenced before check: desc.'
drivers/dma/amd/ptdma/ptdma-dmaengine.c: pt_cmd_callback_work()
warn: variable dereferenced before check 'desc'
Therefore, move the condition check for the 'desc' variable to the first
place and remove the redundant extra condition check.
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/all/bfa0a979-ce9f-422d-92c3-34921155d048@stanley.mountain/
Fixes: 656543989457 ("dmaengine: ptdma: Utilize the AE4DMA engine's multi-queue functionality")
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20250421114215.1687073-1-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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devm_kasprintf() is used to allocate and format a string and the
returned pointer is assigned to 'cmd_cache_name'. However, the variable
'cmd_cache_name' is not effectively used.
Remove the dead code.
Signed-off-by: Eder Zulian <ezulian@redhat.com>
Reviewed-by: Nathan Lynch <nathan.lynch@amd.com>
Acked-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20250411165451.240830-1-ezulian@redhat.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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The pointer 'struct kmem_cache *dma_cmd_cache' was introduced in commit
'b0b4a6b10577 ("dmaengine: ptdma: register PTDMA controller as a DMA
resource")' but it was never used.
Signed-off-by: Eder Zulian <ezulian@redhat.com>
Reviewed-by: Nathan Lynch <nathan.lynch@amd.com>
Link: https://lore.kernel.org/r/20250415121312.870124-1-ezulian@redhat.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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As AE4DMA offers multi-channel functionality compared to PTDMA’s single
queue, utilize multi-queue, which supports higher speeds than PTDMA, to
achieve higher performance using the AE4DMA workqueue based mechanism.
Fixes: 69a47b16a51b ("dmaengine: ptdma: Extend ptdma to support multi-channel and version")
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20250203162511.911946-4-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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Use the ptdma_debugfs_setup function to register debugfs for AE4DMA DMA
engine.
Reviewed-by: Raju Rangoju <Raju.Rangoju@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20241025095931.726018-7-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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To support multi-channel functionality with AE4DMA engine, extend the
ptdma-debugfs with reusable components.
Reviewed-by: Raju Rangoju <Raju.Rangoju@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20241025095931.726018-6-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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Use the pt_dmaengine_register function to register a AE4DMA DMA engine.
Reviewed-by: Raju Rangoju <Raju.Rangoju@amd.com>
Reviewed-by: Philipp Stanner <pstanner@redhat.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20241025095931.726018-5-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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To support multi-channel functionality with AE4DMA engine, extend the
PTDMA code with reusable components.
Reviewed-by: Raju Rangoju <Raju.Rangoju@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20241025095931.726018-4-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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Add support for AMD AE4DMA controller. It performs high-bandwidth
memory to memory and IO copy operation. Device commands are managed
via a circular queue of 'descriptors', each of which specifies source
and destination addresses for copying a single buffer of data.
Reviewed-by: Raju Rangoju <Raju.Rangoju@amd.com>
Reviewed-by: Philipp Stanner <pstanner@redhat.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20241025095931.726018-3-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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PTDMA driver is the AMD DMA driver, and newer AMD platforms support newer
DMA engines. Hence, move the current drivers to the AMD directory. This
would also mean that future driver submissions to the AMD DMA driver will
also land in the AMD-specific directory.
Reviewed-by: Raju Rangoju <Raju.Rangoju@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20241025095931.726018-2-Basavaraj.Natikar@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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