kernel/linux.git/drivers/dma/ti, branch v5.15.7

dmaengine: ti: k3-udma: Set r/tchan or rflow to NULL if request fail

2021-11-18T18:17:16+00:00

commit eb91224e47ec33a0a32c9be0ec0fcb3433e555fd upstream. udma_get_*() checks if rchan/tchan/rflow is already allocated by checking if it has a NON NULL value. For the error cases, rchan/tchan/rflow will have error value and udma_get_*() considers this as already allocated (PASS) since the error values are NON NULL. This results in NULL pointer dereference error while de-referencing rchan/tchan/rflow. Reset the value of rchan/tchan/rflow to NULL if a channel request fails. CC: stable@vger.kernel.org Acked-by: Peter Ujfalusi Signed-off-by: Kishon Vijay Abraham I Link: https://lore.kernel.org/r/20211031032411.27235-3-kishon@ti.com Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

dmaengine: ti: k3-udma: Set bchan to NULL if a channel request fail

2021-11-18T18:17:16+00:00

commit 5c6c6d60e4b489308ae4da8424c869f7cc53cd12 upstream. bcdma_get_*() checks if bchan is already allocated by checking if it has a NON NULL value. For the error cases, bchan will have error value and bcdma_get_*() considers this as already allocated (PASS) since the error values are NON NULL. This results in NULL pointer dereference error while de-referencing bchan. Reset the value of bchan to NULL if a channel request fails. CC: stable@vger.kernel.org Acked-by: Peter Ujfalusi Signed-off-by: Kishon Vijay Abraham I Link: https://lore.kernel.org/r/20211031032411.27235-2-kishon@ti.com Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

dmaengine: ti: k3-psil-j721e: Add entry for CSI2RX

2021-08-29T13:44:19+00:00

The CSI2RX subsystem on J721E is serviced by UDMA via PSI-L to transfer frames to memory. It can have up to 32 threads per instance. J721E has two instances of the subsystem, so there are 64 threads total. Add them to the endpoint map. Signed-off-by: Pratyush Yadav Acked-by: Peter Ujfalusi Link: https://lore.kernel.org/r/20210819110106.31409-1-p.yadav@ti.com Signed-off-by: Vinod Koul

dmaengine: ti: k3-udma: Fix fall-through warning for Clang

2021-07-13T19:48:28+00:00

Fix the following fallthrough warning: drivers/dma/ti/k3-udma.c:4951:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] Reported-by: Nathan Chancellor Signed-off-by: Gustavo A. R. Silva

dmaengine: ti: omap-dma: Skip pointless cpu_pm context restore on errors

2021-05-31T04:31:53+00:00

There's no need to restore DMA context on CPU_CLUSTER_PM_ENTER_FAILED as the DMA context won't be lost on errors. Note that this does not cause invalid context restore as we already check for busy DMA with omap_dma_busy() in CPU_CLUSTER_PM_ENTER, and block any deeper idle states for the SoC by returning NOTIFY_BAD if busy. If other drivers block deeper idle states with cpu_pm, we now just do a pointless restore, but only if dma was not busy on CPU_CLUSTER_PM_ENTER. Let's update the CPU_CLUSTER_PM_ENTER_FAILED handling for correctness, and add a comment. Cc: Aaro Koskinen Cc: Adam Ford Cc: Andreas Kemnade Cc: Peter Ujfalusi Signed-off-by: Tony Lindgren Acked-by: Peter Ujfalusi Link: https://lore.kernel.org/r/20210518074347.16908-1-tony@atomide.com Signed-off-by: Vinod Koul

Merge tag 'dmaengine-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine

2021-02-23T23:05:10+00:00

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 ...

dmaengine: ti: k3-udma: Fix a resource leak in an error handling path

2021-01-26T17:31:32+00:00

In 'dma_pool_create()', we return -ENOMEM, but don't release the resources already allocated, as in all the other error handling paths. Go to 'err_res_free' instead of returning directly. Fixes: 017794739702 ("dmaengine: ti: k3-udma: Initial support for K3 BCDMA") Signed-off-by: Christophe JAILLET Acked-by: Peter Ujfalusi Link: https://lore.kernel.org/r/20210124070923.724479-1-christophe.jaillet@wanadoo.fr Signed-off-by: Vinod Koul

dmaengine: ti: k3-udma: Do not initialize ret in tisci channel config functions

2021-01-13T16:30:37+00:00

The ret does not need to be initialized to 0 in the tisci channel config functions. Signed-off-by: Peter Ujfalusi Link: https://lore.kernel.org/r/20210113114923.9231-4-peter.ujfalusi@gmail.com Signed-off-by: Vinod Koul

dmaengine: ti: k3-udma: Add support for burst_size configuration for mem2mem

2021-01-13T16:30:37+00:00

The UDMA and BCDMA can provide higher throughput if the burst_size of the channel is changed from it's default (which is 64 bytes) for Ultra-high and high capacity channels. This performance benefit is even more visible when the buffers are aligned with the burst_size configuration. The am654 does not have a way to change the burst size, but it is using 64 bytes burst, so increasing the copy_align from 8 bytes to 64 (and clients taking that into account) can increase the throughput as well. Numbers gathered on j721e: echo 8000000 > /sys/module/dmatest/parameters/test_buf_size echo 2000 > /sys/module/dmatest/parameters/timeout echo 50 > /sys/module/dmatest/parameters/iterations echo 1 > /sys/module/dmatest/parameters/max_channels Prior this patch: ~1.3 GB/s After this patch: ~1.8 GB/s with 1 byte alignment: ~1.7 GB/s Signed-off-by: Peter Ujfalusi Signed-off-by: Peter Ujfalusi Tested-by: Kishon Vijay Abraham I Link: https://lore.kernel.org/r/20210113114923.9231-3-peter.ujfalusi@gmail.com Signed-off-by: Vinod Koul

dmaengine: ti: k3-udma: Set rflow count for BCDMA split channels

2021-01-13T11:22:19+00:00

BCDMA RX channels have one flow per channel, therefore set the rflow_cnt to rchan_cnt. Without this patch, request for BCDMA RX channel allocation fails as rflow_cnt is 0 thus fails to reserve a rflow for the channel. Fixes: 8844898028d4 ("dmaengine: ti: k3-udma: Add support for BCDMA channel TPL handling") Signed-off-by: Vignesh Raghavendra Acked-by: Peter Ujfalusi Link: https://lore.kernel.org/r/20210112141403.30286-1-vigneshr@ti.com Signed-off-by: Vinod Koul