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2019-12-27ioat: ioat_alloc_ring() failure handling.Alexander.Barabash@dell.com1-1/+2
If dma_alloc_coherent() returns NULL in ioat_alloc_ring(), ring allocation must not proceed. Until now, if the first call to dma_alloc_coherent() in ioat_alloc_ring() returned NULL, the processing could proceed, failing with NULL-pointer dereferencing further down the line. Signed-off-by: Alexander Barabash <alexander.barabash@dell.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/75e9c0e84c3345d693c606c64f8b9ab5@x13pwhopdag1307.AMER.DELL.COM Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-12-23dmaengine: virt-dma: Fix access after free in vchan_complete()Peter Ujfalusi1-2/+1
vchan_vdesc_fini() is freeing up 'vd' so the access to vd->tx_result is via already freed up memory. Move the vchan_vdesc_fini() after invoking the callback to avoid this. Fixes: 09d5b702b0f97 ("dmaengine: virt-dma: store result on dma descriptor") Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Link: https://lore.kernel.org/r/20191220131100.21804-1-peter.ujfalusi@ti.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-12-23dmaengine: k3dma: Avoid null pointer traversalJohn Stultz1-3/+9
In some cases we seem to submit two transactions in a row, which causes us to lose track of the first. If we then cancel the request, we may still get an interrupt, which traverses a null ds_run value. So try to avoid starting a new transaction if the ds_run value is set. While this patch avoids the null pointer crash, I've had some reports of the k3dma driver still getting confused, which suggests the ds_run/ds_done value handling still isn't quite right. However, I've not run into an issue recently with it so I think this patch is worth pushing upstream to avoid the crash. Signed-off-by: John Stultz <john.stultz@linaro.org> [add ss tag] Link: https://lore.kernel.org/r/20191218190906.6641-1-john.stultz@linaro.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-12-11dmaengine: dma-jz4780: Also break descriptor chains on JZ4725BPaul Cercueil1-1/+2
It turns out that the JZ4725B displays the same buggy behaviour as the JZ4740 that was described in commit f4c255f1a747 ("dmaengine: dma-jz4780: Break descriptor chains on JZ4740"). Work around it by using the same workaround previously used for the JZ4740. Fixes commit f4c255f1a747 ("dmaengine: dma-jz4780: Break descriptor chains on JZ4740") Cc: <stable@vger.kernel.org> Signed-off-by: Paul Cercueil <paul@crapouillou.net> Link: https://lore.kernel.org/r/20191210165545.59690-1-paul@crapouillou.net Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-22dmaengine: Fix Kconfig indentationKrzysztof Kozlowski1-30/+30
Adjust indentation from spaces to tab (+optional two spaces) as in coding style with command like: $ sed -e 's/^ /\t/' -i */Kconfig Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/1574306348-29212-1-git-send-email-krzk@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-22dmaengine: sf-pdma: move macro to header fileGreen Wan2-1/+2
The place where the macro, SF_PDMA_REG_BASE(), is cause kernel-doc using wrong function declaration. Move it to header file. Signed-off-by: Green Wan <green.wan@sifive.com> Link: https://lore.kernel.org/r/20191118143554.16129-2-green.wan@sifive.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-22dmaengine: sf-pdma: replace /** with /* for non-function commentGreen Wan2-2/+2
There are several comments starting from "/**" but not for function comment purpose. It causes kernel-doc parsing wrong string. Replace "/**" with "/*" to fix them. Signed-off-by: Green Wan <green.wan@sifive.com> Link: https://lore.kernel.org/r/20191118143554.16129-1-green.wan@sifive.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-22dmaengine: ti: edma: fix missed failure handlingChuhong Yuan1-2/+4
When devm_kcalloc fails, it forgets to call edma_free_slot. Replace direct return with failure handler to fix it. Fixes: 1be5336bc7ba ("dmaengine: edma: New device tree binding") Signed-off-by: Chuhong Yuan <hslester96@gmail.com> Link: https://lore.kernel.org/r/20191118073802.28424-1-hslester96@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-22dmaengine: mmp_pdma: add missed of_dma_controller_freeChuhong Yuan1-0/+2
The driver calls of_dma_controller_register in probe but does not free it in remove. Add the call to fix it. Signed-off-by: Chuhong Yuan <hslester96@gmail.com> Link: https://lore.kernel.org/r/20191115083153.12334-1-hslester96@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-22dmaengine: mmp_tdma: add missed of_dma_controller_freeChuhong Yuan1-0/+3
The driver calls of_dma_controller_register in probe but does not free it in remove. Add the call to fix it. Signed-off-by: Chuhong Yuan <hslester96@gmail.com> Link: https://lore.kernel.org/r/20191115083100.12220-1-hslester96@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-14dmaengine: sprd: Add wrap address support for link-list modeEric Long1-0/+13
The Spreadtrum Audio compress offload mode will use 2-stage DMA transfer to save power. That means we can request 2 dma channels, one for source channel, and another one for destination channel. Once the source channel's transaction is done, it will trigger the destination channel's transaction automatically by hardware signal. In this case, the source channel will transfer data from IRAM buffer to the DSP fifo to decoding/encoding, once IRAM buffer is empty by transferring done, the destination channel will start to transfer data from DDR buffer to IRAM buffer. Since the destination channel will use link-list mode to fill the IRAM data, and IRAM buffer is allocated by 32K, and DDR buffer is larger to 2M, that means we need lots of link-list nodes to do a cyclic transfer, instead wasting lots of link-list memory, we can use wrap address support to reduce link-list node number, which means when the transfer address reaches the wrap address, the transfer address will jump to the wrap_to address specified by wrap_to register, and only 2 link-list nodes can do a cyclic transfer to transfer data from DDR to IRAM. Thus this patch adds wrap address to support this case. [Baolin Wang changes the commit message] Signed-off-by: Eric Long <eric.long@unisoc.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Link: https://lore.kernel.org/r/85a5484bc1f3dd53ce6f92700ad8b35f30a0b096.1571812029.git.baolin.wang@linaro.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-14Merge branch 'fixes' into nextVinod Koul6-4/+88
2019-11-14dmaengine: sf-pdma: add platform DMA support for HiFive Unleashed A00Green Wan6-0/+753
Add PDMA driver, sf-pdma, to enable DMA engine on HiFive Unleashed Rev A00 board. - Implement dmaengine APIs, support MEM_TO_MEM async copy. - Tested by DMA Test client - Supports 4 channels DMA, each channel has 1 done and 1 err interrupt connected to platform-level interrupt controller (PLIC). - Depends on DMA_ENGINE and DMA_VIRTUAL_CHANNELS The datasheet is here: https://static.dev.sifive.com/FU540-C000-v1.0.pdf Follow the DMAengine controller doc, "./Documentation/driver-api/dmaengine/provider.rst" to implement DMA engine. And use the dma test client in doc, "./Documentation/driver-api/dmaengine/dmatest.rst", to test. Each DMA channel has separate HW regs and support done and error ISRs. 4 channels share 1 done and 1 err ISRs. There's no expander/arbitrator in DMA HW. ------ ------ | |--< done 23 >--|ch 0| | |--< err 24 >--| | (dma0chan0) | | ------ | | ------ | |--< done 25 >--|ch 1| | |--< err 26 >--| | (dma0chan1) |PLIC| ------ | | ------ | |--< done 27 >--|ch 2| | |--< err 28 >--| | (dma0chan2) | | ------ | | ------ | |--< done 29 >--|ch 3| | |--< err 30 >--| | (dma0chan3) ------ ------ Signed-off-by: Green Wan <green.wan@sifive.com> Link: https://lore.kernel.org/r/20191107084955.7580-4-green.wan@sifive.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-14dmaengine: zx: remove: removed dmam_pool_destroySatendra Singh Thakur1-1/+0
In the probe method dmam_pool_create is used. Therefore, there is no need to explicitly call dmam_pool_destroy in remove method as this will be automatically taken care by devres Signed-off-by: Satendra Singh Thakur <sst2005@gmail.com> Link: https://lore.kernel.org/r/20191109113609.6159-1-sst2005@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-14dmaengine: mediatek: hsdma_probe: fixed a memory leak when devm_request_irq ↵Satendra Singh Thakur1-1/+3
fails When devm_request_irq fails, currently, the function dma_async_device_unregister gets called. This doesn't free the resources allocated by of_dma_controller_register. Therefore, we have called of_dma_controller_free for this purpose. Signed-off-by: Satendra Singh Thakur <sst2005@gmail.com> Link: https://lore.kernel.org/r/20191109113523.6067-1-sst2005@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-14dmaengine: iop-adma: clean up an indentation issueColin Ian King1-1/+1
There is a statement that is indented too deeply, remove the extraneous indentation. Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20191112191143.282814-1-colin.king@canonical.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-08dmaengine: milbeaut-xdmac: remove redundant error logVinod Koul1-4/+1
platform_get_irq() prints the error message, so caller need not do so, remove the error line in this driver for platform_get_irq() Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org> Link: https://lore.kernel.org/r/20191106163128.1980714-2-vkoul@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-08dmaengine: milbeaut-hdmac: remove redundant error logVinod Koul1-4/+1
platform_get_irq() prints the error message, so caller need not do so, remove the error line in this driver for platform_get_irq() Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org> Link: https://lore.kernel.org/r/20191106163128.1980714-1-vkoul@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-08dmaengine: dma-jz4780: add missed clk_disable_unprepare in removeChuhong Yuan1-0/+1
The remove misses to disable and unprepare jzdma->clk. Add a call to clk_disable_unprepare to fix it. Signed-off-by: Chuhong Yuan <hslester96@gmail.com> Acked-by: Paul Cercueil <paul@crapouillou.net> Link: https://lore.kernel.org/r/20191104161622.11758-1-hslester96@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-06dmaengine: JZ4780: Add support for the X1000.Zhou Yanjie1-0/+7
Add support for probing the dma-jz4780 driver on the X1000 Soc. Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com> Reviewed-by: Paul Cercueil <paul@crapouillou.net> Link: https://lore.kernel.org/r/1571937670-30828-3-git-send-email-zhouyanjie@zoho.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-06dmaengine: xilinx_dma: Add Xilinx AXI MCDMA Engine driver supportRadhey Shyam Pandey2-9/+455
Add support for AXI Multichannel Direct Memory Access (AXI MCDMA) core, which is a soft Xilinx IP core that provides high-bandwidth direct memory access between memory and AXI4-Stream target peripherals. The AXI MCDMA core provides scatter-gather interface with multiple independent transmit and receive channels. The driver supports device_prep_slave_sg slave transfer mode. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571763622-29281-7-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-06dmaengine: xilinx_dma: Extend dma_config struct to store irq routine handleRadhey Shyam Pandey1-2/+6
Extend dma_config structure to store irq routine handle. It enables runtime handler selection based on xdma_ip_type and serves as preparatory patch for adding MCDMA IP support. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Suggested-by: Vinod Koul <vkoul@kernel.org> Link: https://lore.kernel.org/r/1571763622-29281-6-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-06dmaengine: xilinx_dma: Remove axidma multichannel mode supportRadhey Shyam Pandey1-147/+8
The AXI DMA multichannel support is deprecated in the IP and it is no longer actively supported. For multichannel support, refer to the AXI multichannel direct memory access IP product guide(PG228) and MCDMA driver. So inline with it remove axidma multichannel support from from the driver. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571763622-29281-5-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-05dmaengine: ti: edma: Add support for handling reserved channelsPeter Ujfalusi1-6/+53
Like paRAM slots, channels could be used by other cores and in this case we need to make sure that the driver do not alter these channels. Handle the generic dma-channel-mask property to mark channels in a bitmap which can not be used by Linux and convert the legacy rsv_chans if it is provided by platform_data. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Link: https://lore.kernel.org/r/20191025073056.25450-4-peter.ujfalusi@ti.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-02dmaengine: fsl-dpaa2-qdma: Remove unnecessary local variables in ↵Nathan Chancellor1-3/+1
DPDMAI_CMD_CREATE macro Clang warns: drivers/dma/fsl-dpaa2-qdma/dpdmai.c:148:25: warning: variable 'cfg' is uninitialized when used within its own initialization [-Wuninitialized] DPDMAI_CMD_CREATE(cmd, cfg); ~~~~~~~~~~~~~~~~~~~~~~~^~~~ drivers/dma/fsl-dpaa2-qdma/dpdmai.c:42:24: note: expanded from macro 'DPDMAI_CMD_CREATE' typeof(_cfg) (cfg) = (_cfg); \ ~~~ ^~~~ 1 warning generated. Looking at the preprocessed source, we can see that this is true. int dpdmai_create(struct fsl_mc_io *mc_io, u32 cmd_flags, const struct dpdmai_cfg *cfg, u16 *token) { struct fsl_mc_command cmd = { 0 }; int err; cmd.header = mc_encode_cmd_header((((0x90E) << 4) | 0), cmd_flags, 0); do { typeof(cmd)(cmd) = (cmd); typeof(cfg)(cfg) = (cfg); ((cmd).params[0] |= mc_enc((8), (8), (cfg)->priorities[0])); ((cmd).params[0] |= mc_enc((16), (8), (cfg)->priorities[1])); } while (0); I cannot see a good reason to create another version of cfg when the parameter one will work perfectly fine and cmd can just be used as is. Remove them to fix this warning. Fixes: f2835adf8afb ("dmaengine: fsl-dpaa2-qdma: Add the DPDMAI(Data Path DMA Interface) support") Link: https://github.com/ClangBuiltLinux/linux/issues/746 Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Link: https://lore.kernel.org/r/20191022171648.37732-1-natechancellor@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-02dmaengine: fsl-qdma: Handle invalid qdma-queue0 IRQKrzysztof Kozlowski1-0/+3
platform_get_irq_byname() might return -errno which later would be cast to an unsigned int and used in IRQ handling code leading to usage of wrong ID and errors about wrong irq_base. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Peng Ma <peng.ma@nxp.com> Tested-by: Peng Ma <peng.ma@nxp.com> Link: https://lore.kernel.org/r/20191004150826.6656-1-krzk@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-23dmaengine: cppi41: Fix cppi41_dma_prep_slave_sg() when idleTony Lindgren1-1/+20
Yegor Yefremov <yegorslists@googlemail.com> reported that musb and ftdi uart can fail for the first open of the uart unless connected using a hub. This is because the first dma call done by musb_ep_program() must wait if cppi41 is PM runtime suspended. Otherwise musb_ep_program() continues with other non-dma packets before the DMA transfer is started causing at least ftdi uarts to fail to receive data. Let's fix the issue by waking up cppi41 with PM runtime calls added to cppi41_dma_prep_slave_sg() and return NULL if still idled. This way we have musb_ep_program() continue with PIO until cppi41 is awake. Fixes: fdea2d09b997 ("dmaengine: cppi41: Add basic PM runtime support") Reported-by: Yegor Yefremov <yegorslists@googlemail.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Cc: stable@vger.kernel.org # v4.9+ Link: https://lore.kernel.org/r/20191023153138.23442-1-tony@atomide.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-23dmaengine: fsl-dpaa2-qdma: export the symbolsPeng Ma1-0/+12
The symbols were not exported leading to error: WARNING: modpost: missing MODULE_LICENSE() in drivers/dma/fsl-dpaa2-qdma/dpdmai.o see include/linux/module.h for more information GZIP arch/arm64/boot/Image.gz ERROR: "dpdmai_enable" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_set_rx_queue" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_get_tx_queue" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_get_rx_queue" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_get_attributes" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_open" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_close" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_disable" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_reset" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! WARNING: "HYPERVISOR_platform_op" [vmlinux] is a static EXPORT_SYMBOL_GPL make[2]: *** [__modpost] Error 1 make[1]: *** [modules] Error 2 make[1]: *** Waiting for unfinished jobs.... make: *** [sub-make] Error 2 So export it. Signed-off-by: Peng Ma <peng.ma@nxp.com> Reported-by: Anders Roxell <anders.roxell@linaro.org> Link: https://lore.kernel.org/r/20191023045617.22764-1-peng.ma@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Clear desc_pendingcount in xilinx_dma_resetNicholas Graumann1-0/+1
Whenever we reset the channel, we need to clear desc_pendingcount along with desc_submitcount. Otherwise when a new transaction is submitted, the irq coalesce level could be programmed to an incorrect value in the axidma case. This behavior can be observed when terminating pending transactions with xilinx_dma_terminate_all() and then submitting new transactions without releasing and requesting the channel. Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-8-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Print debug message when no free tx segmentsNicholas Graumann1-0/+3
The driver should not run out of tx segments in normal operation. But, if the user attempts to prepare a transaction with a large sg list, the driver may not have enough free segments to accommodate the request. Log a message at the debug level to inform the user in case they are experiencing issues. Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-7-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Add callback_result supportNicholas Graumann1-1/+25
Take advantage of dmaengine_desc_get_callback_invoke which allows either a callback or callback_result to be specified. This can be useful when using the AXI DMA transfer unknown quantities of data where the residue contained in the result can be used to calculate the number of bytes transferred. Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-6-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Introduce xilinx_dma_get_residueNicholas Graumann1-17/+54
Introduce a function that can calculate residues for IPs that support it: AXI DMA and CDMA. Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-5-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Remove residue from channel dataRadhey Shyam Pandey1-4/+1
There is no use of storing channel data residue field. So clean it up. In tx_status simply pass calculated residue to dma_set_residue. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-4-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Merge get_callback and _invokeNicholas Graumann1-4/+1
The dma api provides a single interface to get the appropriate callback and invoke it directly. Prefer using it. Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-3-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Remove desc_callback_valid checkRadhey Shyam Pandey1-5/+3
In descriptor cleanup the call to desc_callback_valid can be safely removed as both callback pointers i.e callback_result and callback are anyway checked in invoke(). There is no much benefit in having redundant checks. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com> Reviewed-by: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-2-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-18dmaengine: milbeaut-xdmac: Add XDMAC driver for Milbeaut platformsJassi Brar3-0/+429
Driver for Socionext Milbeaut XDMAC controller. The controller only supports Mem-To-Mem transfers over upto 8 configurable channels. Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org> Link: https://lore.kernel.org/r/20191015033219.14713-1-jassisinghbrar@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-18dmaengine: milbeaut-hdmac: Add HDMAC driver for Milbeaut platformsJassi Brar3-0/+592
Driver for Socionext Milbeaut HDMAC controller. The controller has upto 8 floating channels, that need a predefined slave-id to work from a set of slaves. Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org> Link: https://lore.kernel.org/r/20191015033359.14925-1-jassisinghbrar@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-18dmaengine: qcom: bam_dma: Fix resource leakJeffrey Hugo1-0/+19
bam_dma_terminate_all() will leak resources if any of the transactions are committed to the hardware (present in the desc fifo), and not complete. Since bam_dma_terminate_all() does not cause the hardware to be updated, the hardware will still operate on any previously committed transactions. This can cause memory corruption if the memory for the transaction has been reassigned, and will cause a sync issue between the BAM and its client(s). Fix this by properly updating the hardware in bam_dma_terminate_all(). Fixes: e7c0fe2a5c84 ("dmaengine: add Qualcomm BAM dma driver") Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20191017152606.34120-1-jeffrey.l.hugo@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-17dmaengine: fsl-dpaa2-qdma: Add NXP dpaa2 qDMA controller driver for ↵Peng Ma6-0/+993
Layerscape SoCs DPPA2(Data Path Acceleration Architecture 2) qDMA supports virtualized channel by allowing DMA jobs to be enqueued into different work queues. Core can initiate a DMA transaction by preparing a frame descriptor(FD) for each DMA job and enqueuing this job through a hardware portal. DPAA2 components can also prepare a FD and enqueue a DMA job through a hardware portal. The qDMA prefetches DMA jobs through DPAA2 hardware portal. It then schedules and dispatches to internal DMA hardware engines, which generate read and write requests. Both qDMA source data and destination data can be either contiguous or non-contiguous using one or more scatter/gather tables. The qDMA supports global bandwidth flow control where all DMA transactions are stalled if the bandwidth threshold has been reached. Also supported are transaction based read throttling. Add NXP dppa2 qDMA to support some of Layerscape SoCs. such as: LS1088A, LS208xA, LX2, etc. Signed-off-by: Peng Ma <peng.ma@nxp.com> Link: https://lore.kernel.org/r/20190930020440.7754-2-peng.ma@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-17dmaengine: fsl-dpaa2-qdma: Add the DPDMAI(Data Path DMA Interface) supportPeng Ma2-0/+543
The MC(Management Complex) exports the DPDMAI(Data Path DMA Interface) object as an interface to operate the DPAA2(Data Path Acceleration Architecture 2) qDMA Engine. The DPDMAI enables sending frame-based requests to qDMA and receiving back confirmation response on transaction completion, utilizing the DPAA2 QBMan(Queue Manager and Buffer Manager hardware) infrastructure. DPDMAI object provides up to two priorities for processing qDMA requests. The following list summarizes the DPDMAI main features and capabilities: 1. Supports up to two scheduling priorities for processing service requests. - Each DPDMAI transmit queue is mapped to one of two service priorities, allowing further prioritization in hardware between requests from different DPDMAI objects. 2. Supports up to two receive queues for incoming transaction completion confirmations. - Each DPDMAI receive queue is mapped to one of two receive priorities, allowing further prioritization between other interfaces when associating the DPDMAI receive queues to DPIO or DPCON(Data Path Concentrator) objects. 3. Supports different scheduling options for processing received packets: - Queues can be configured either in 'parked' mode (default), or attached to a DPIO object, or attached to DPCON object. 4. Allows interaction with one or more DPIO objects for dequeueing/enqueueing frame descriptors(FD) and for acquiring/releasing buffers. 5. Supports enable, disable, and reset operations. Add dpdmai to support some platforms with dpaa2 qdma engine. Signed-off-by: Peng Ma <peng.ma@nxp.com> Link: https://lore.kernel.org/r/20190930020440.7754-1-peng.ma@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-15dmaengine: sprd: Fix the possible memory leak issueBaolin Wang1-0/+15
If we terminate the channel to free all descriptors associated with this channel, we will leak the memory of current descriptor if the current descriptor is not completed, since it had been deteled from the desc_issued list and have not been added into the desc_completed list. Thus we should check if current descriptor is completed or not, when freeing the descriptors associated with one channel, if not, we should free it to avoid this issue. Fixes: 9b3b8171f7f4 ("dmaengine: sprd: Add Spreadtrum DMA driver") Reported-by: Zhenfang Wang <zhenfang.wang@unisoc.com> Tested-by: Zhenfang Wang <zhenfang.wang@unisoc.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Link: https://lore.kernel.org/r/170dbbc6d5366b6fa974ce2d366652e23a334251.1570609788.git.baolin.wang@linaro.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-15dmaengine: sprd: Change to use devm_platform_ioremap_resource()Baolin Wang1-3/+1
Use the new helper that wraps the calls to platform_get_resource() and devm_ioremap_resource() together, which can simpify the code. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Link: https://lore.kernel.org/r/1af3efdac3b217203cace090c8947386854c0144.1569554639.git.baolin.wang@linaro.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-15dmaengine: xilinx_dma: Fix control reg update in vdma_channel_set_configRadhey Shyam Pandey1-0/+7
In vdma_channel_set_config clear the delay, frame count and master mask before updating their new values. It avoids programming incorrect state when input parameters are different from default. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Acked-by: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Link: https://lore.kernel.org/r/1569495060-18117-3-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-15dmaengine: xilinx_dma: Fix 64-bit simple AXIDMA transferRadhey Shyam Pandey1-1/+2
In AXI DMA simple mode also pass MSB bits of source and destination address to xilinx_write function. It fixes simple AXI DMA operation mode using 64-bit addressing. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1569495060-18117-2-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-15dmaengine: xilinx_dma: Remove clk_get error message for probe deferRadhey Shyam Pandey1-5/+14
In dma probe, the driver checks for devm_clk_get return and print error message in the failing case. However for -EPROBE_DEFER this message is confusing so avoid it. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Link: https://lore.kernel.org/r/1569495060-18117-5-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-15dmaengine: xilinx_dma: use devm_platform_ioremap_resource()Radhey Shyam Pandey1-3/+1
Replace the chain of platform_get_resource() and devm_ioremap_resource() with devm_platform_ioremap_resource(). It simplifies the flow and there is no functional change. Fixes below cocinelle warning- WARNING: Use devm_platform_ioremap_resource for xdev -> regs Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1569495060-18117-4-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: iop-adma: make array 'handler' static const, makes object smallerColin Ian King1-3/+5
Don't populate the array 'handler' on the stack but instead make it static const. Makes the object code smaller by 80 bytes. Before: text data bss dec hex filename 38225 9084 64 47373 b90d drivers/dma/iop-adma.o After: text data bss dec hex filename 38081 9148 64 47293 b8bd drivers/dma/iop-adma.o (gcc version 9.2.1, amd64) Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20190905163726.19690-1-colin.king@canonical.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: dw: platform: Mark 'hclk' clock optionalAndy Shevchenko1-1/+1
On some platforms the clock can be fixed rate, always running one and there is no need to do anything with it. In order to support those platforms, switch to use optional clock. Fixes: f8d9ddbc2851 ("dmaengine: dw: platform: Enable iDMA 32-bit on Intel Elkhart Lake") Depends-on: 60b8f0ddf1a9 ("clk: Add (devm_)clk_get_optional() functions") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Link: https://lore.kernel.org/r/20190924085116.83683-1-andriy.shevchenko@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: imx-sdma: fix size check for sdma script_numberRobin Gong1-0/+8
Illegal memory will be touch if SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3 (41) exceed the size of structure sdma_script_start_addrs(40), thus cause memory corrupt such as slob block header so that kernel trap into while() loop forever in slob_free(). Please refer to below code piece in imx-sdma.c: for (i = 0; i < sdma->script_number; i++) if (addr_arr[i] > 0) saddr_arr[i] = addr_arr[i]; /* memory corrupt here */ That issue was brought by commit a572460be9cf ("dmaengine: imx-sdma: Add support for version 3 firmware") because SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3 (38->41 3 scripts added) not align with script number added in sdma_script_start_addrs(2 scripts). Fixes: a572460be9cf ("dmaengine: imx-sdma: Add support for version 3 firmware") Cc: stable@vger.kernel Link: https://www.spinics.net/lists/arm-kernel/msg754895.html Signed-off-by: Robin Gong <yibin.gong@nxp.com> Reported-by: Jurgen Lambrecht <J.Lambrecht@TELEVIC.com> Link: https://lore.kernel.org/r/1569347584-3478-1-git-send-email-yibin.gong@nxp.com [vkoul: update the patch title] Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: zx: Use devm_platform_ioremap_resource() in zx_dma_probe()Markus Elfring1-6/+1
Simplify this function implementation by using a known wrapper function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Acked-by: Shawn Guo <shawnguo@kernel.org> Link: https://lore.kernel.org/r/85de79fa-1ca5-a1e5-0296-9e8a2066f134@web.de Signed-off-by: Vinod Koul <vkoul@kernel.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 20:41:51 +0000