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* dmaengine: k3dma: Avoid null pointer traversalJohn Stultz2019-12-231-3/+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>
* dmaengine: k3dma: Use devm_platform_ioremap_resource() in k3_dma_probe()Markus Elfring2019-10-141-6/+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> Link: https://lore.kernel.org/r/aaed7862-49bb-e368-3e7b-5cc2c3d915b1@web.de Signed-off-by: Vinod Koul <vkoul@kernel.org>
* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner2019-06-191-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* dmaengine: k3dma: Add support for dma-channel-maskLi Yu2019-02-041-1/+19
| | | | | | | | | | | | | | | | | | | | | | | Add dma-channel-mask as a property for k3dma, it defines available dma channels which a non-secure mode driver can use. One sample usage of this is in Hi3660 SoC. DMA channel 0 is reserved to lpm3, which is a coprocessor for power management. So as a result, any request in kernel (which runs on main processor and in non-secure mode) should start from at least channel 1. Cc: Dan Williams <dan.j.williams@intel.com> Cc: Vinod Koul <vkoul@kernel.org> Cc: Tanglei Han <hantanglei@huawei.com> Cc: Zhuangluan Su <suzhuangluan@hisilicon.com> Cc: Ryan Grachek <ryan@edited.us> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Cc: Guodong Xu <guodong.xu@linaro.org> Cc: dmaengine@vger.kernel.org Signed-off-by: Li Yu <liyu65@hisilicon.com> [jstultz: Reworked to use a channel mask] Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
* dmaengine: k3dma: Delete axi_configLi Yu2019-02-041-3/+0
| | | | | | | | | | | | | | | | | | | | | | Axi_config controls whether DMA resources can be accessed in non-secure mode, such as linux kernel. The register should be set by the bootloader stage and depends on the device. Thus, this patch removes axi_config from k3dma driver. Cc: Dan Williams <dan.j.williams@intel.com> Cc: Vinod Koul <vkoul@kernel.org> Cc: Tanglei Han <hantanglei@huawei.com> Cc: Zhuangluan Su <suzhuangluan@hisilicon.com> Cc: Ryan Grachek <ryan@edited.us> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Cc: dmaengine@vger.kernel.org Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Li Yu <liyu65@hisilicon.com> Signed-off-by: Guodong Xu <guodong.xu@linaro.org> [jstultz: Minor tweaks to commit message] Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
* dmaengine: k3dma: Upgrade k3dma driver to support hisi_asp_dma hardwareYoulin Wang2019-02-041-5/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On the hi3660 hardware there are two (at least) DMA controllers, the DMA-P (Peripheral DMA) and the DMA-A (Audio DMA). The two blocks are similar, but have some slight differences. This resulted in the vendor implementing two separate drivers, which after review, they have been able to condense and re-use the existing k3dma driver. Thus, this patch adds support for the new "hisi-pcm-asp-dma-1.0" compatible string in the binding. One difference with the DMA-A controller, is that it does not need to initialize a clock. So we skip this by adding and using soc data flags. After above this driver will support both k3 and hisi_asp dma hardware. Cc: Dan Williams <dan.j.williams@intel.com> Cc: Vinod Koul <vkoul@kernel.org> Cc: Zhuangluan Su <suzhuangluan@hisilicon.com> Cc: Ryan Grachek <ryan@edited.us> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Cc: dmaengine@vger.kernel.org Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Youlin Wang <wwx575822@notesmail.huawei.com> Signed-off-by: Tanglei Han <hantanglei@huawei.com> [jstultz: Reworked to use of_match_data, commit msg improvements] Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
* dmaengine: k3dma: remove dma_slave_config direction usageVinod Koul2018-10-071-6/+20
| | | | | | | | | dma_slave_config direction was marked as deprecated quite some time back, remove the usage from this driver so that the field can be removed Tested-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
* dmaengine: k3dma: dont use direction for memcpyVinod Koul2018-10-071-8/+2
| | | | | | | | Memcpy has no direction (copy from memory to memory) so remove the check in prep_memcpy() Tested-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
* dmaengine: k3dma: Off by one in k3_of_dma_simple_xlate()Dan Carpenter2018-06-281-1/+1
| | | | | | | | | The d->chans[] array has d->dma_requests elements so the > should be >= here. Fixes: 8e6152bc660e ("dmaengine: Add hisilicon k3 DMA engine driver") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
* treewide: devm_kzalloc() -> devm_kcalloc()Kees Cook2018-06-131-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc(). This patch replaces cases of: devm_kzalloc(handle, a * b, gfp) with: devm_kcalloc(handle, a * b, gfp) as well as handling cases of: devm_kzalloc(handle, a * b * c, gfp) with: devm_kzalloc(handle, array3_size(a, b, c), gfp) as it's slightly less ugly than: devm_kcalloc(handle, array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: devm_kzalloc(handle, 4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. Some manual whitespace fixes were needed in this patch, as Coccinelle really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...". The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ expression HANDLE; type TYPE; expression THING, E; @@ ( devm_kzalloc(HANDLE, - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | devm_kzalloc(HANDLE, - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression HANDLE; expression COUNT; typedef u8; typedef __u8; @@ ( devm_kzalloc(HANDLE, - sizeof(u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ expression HANDLE; type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ expression HANDLE; identifier SIZE, COUNT; @@ - devm_kzalloc + devm_kcalloc (HANDLE, - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression HANDLE; expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression HANDLE; expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ expression HANDLE; identifier STRIDE, SIZE, COUNT; @@ ( devm_kzalloc(HANDLE, - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression HANDLE; expression E1, E2, E3; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression HANDLE; expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, sizeof(THING) * C2, ...) | devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...) | devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, C1 * C2, ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * E2 + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * (E2) + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
* dmaengine: k3dma: Use vchan_terminate_vdesc() instead of desc_freePeter Ujfalusi2017-12-041-1/+9
| | | | | | | | | | | | To avoid race with vchan_complete, use the race free way to terminate running transfer. Implement the device_synchronize callback to make sure that the terminated descriptor is freed. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: k3dma: remove useless ON_WARN_ONCE()Antonio Borneo2017-08-251-2/+0
| | | | | | | | | | | | | | | | Commit 36387a2b1f62b5c087c5fe6f0f7b23b94f722ad7 ("k3dma: Fix memory handling in preparation for cyclic mode") adds few calls to ON_WARN_ONCE() to track the use of ds_run/ds_done. After the two fixes: - dmaengine: k3dma: fix non-cyclic mode - dmaengine: k3dma: fix re-free of the same descriptor the behaviour of ds_run/ds_done is properly fixed. The remaining ON_WARN_ONCE() are never triggered and can be removed. Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: k3dma: fix double free of descriptorAntonio Borneo2017-08-251-5/+1
| | | | | | | | | | | | | | | | | | | | Commit 36387a2b1f62b5c087c5fe6f0f7b23b94f722ad7 ("k3dma: Fix memory handling in preparation for cyclic mode") adds code to free the descriptor in ds_done. In cyclic mode, ds_done is never used and it's always NULL, so the added code is not executed. In non-cyclic mode, ds_done is used as a flag: when not NULL it signals that the descriptor has been consumed. No need to free it because it would be free by vchan_complete(). The fix takes back the code changed by the commit above: - remove the free on the descriptor; - initialize ds_done to NULL for the next run. Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: k3dma: fix non-cyclic modeAntonio Borneo2017-08-251-1/+3
| | | | | | | | | | | | | | | | | | | | Commit 36387a2b1f62b5c087c5fe6f0f7b23b94f722ad7 ("k3dma: Fix memory handling in preparation for cyclic mode") broke the logic around ds_run/ds_done in case of non-cyclic DMA. This went unnoticed as the only user of k3dma was the i2s audio driver but, with a patch set to enable dma on SPI, the issue popped out. The fix re-applies the initialization to ds_run/ds_done in k3_dma_start_txd() that were removed by the commit above. Also, one of the calls to k3_dma_start_txd() is triggered by (ds_done != NULL), so remove the noisy and useless call to WARN_ON_ONCE(). Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: k3dma: move to dma_pool_zallocVinod Koul2016-12-081-2/+1
| | | | | | | Replace dma_pool_alloc & memset with dma_pool_zalloc. Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: k3dma: use correct format string for debug outputArnd Bergmann2016-09-071-3/+3
| | | | | | | | | | | | | | | | | | | The newly added k3_dma_prep_dma_cyclic function has some debug output that uses incorrect typecasts, some of which cause a warning like: drivers/dma/k3dma.c: In function 'k3_dma_prep_dma_cyclic': drivers/dma/k3dma.c:589:671: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast] In general, we have to print 'dma_addr_t' values using special '%pad' format to get the correct behavior on kernels that have a 64-bit dma_addr_t type but 32-bit pointers. Similarly, printing size_t values should be done using the %z modifier to get the correct behavior on 64-bit kernels. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: a7e08fa6cc78 ("k3dma: Add cyclic mode for audio") Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* k3dma: Add cyclic mode for audioAndy Green2016-08-311-11/+103
| | | | | | | | | | | | | | | | | | | | | Currently the k3dma driver doesn't offer the cyclic mode necessary for handling audio. This patch adds it. Cc: Zhangfei Gao <zhangfei.gao@linaro.org> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Mark Brown <broonie@kernel.org> Cc: Andy Green <andy@warmcat.com> Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Andy Green <andy.green@linaro.org> [jstultz: Forward ported to mainline, removed a few bits of logic that didn't seem to have much effect] Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* k3dma: Fix memory handling in preparation for cyclic modeJohn Stultz2016-08-311-14/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | With cyclic mode, the shared virt-dma logic doesn't actually manage the descriptor state, nor the calling of the descriptor free callback. This results in leaking a desc structure every time we start an audio transfer. Thus we must manage it ourselves. The k3dma driver already keeps track of the active and finished descriptors via ds_run and ds_done pointers, so cleanup how we handle those two values, so when we tear down everything in terminate_all, call free_desc on the ds_run and ds_done pointers if they are not null. NOTE: HiKey doesn't use the non-cyclic dma modes, so I'm not been able to test those modes. But with this patch we no longer leak the desc structures. Cc: Zhangfei Gao <zhangfei.gao@linaro.org> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Mark Brown <broonie@kernel.org> Cc: Andy Green <andy@warmcat.com> Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* k3dma: Fix occasional DMA ERR issue by using proper dma apiJohn Stultz2016-08-311-8/+45
| | | | | | | | | | | | | | | | | | | | | | | | After lots of debugging on an occasional DMA ERR issue, I realized that the desc structures which we point the dma hardware are being allocated out of regular memory. This means when we fill the desc structures, that data doesn't always get flushed out to memory by the time we start the dma transfer, resulting in the dma engine getting some null values, resulting in a DMA ERR on the first irq. Thus, this patch adopts mechanism similar to the zx296702_dma of allocating the desc structures from a dma pool, so the memory caching rules are properly set to avoid this issue. Cc: Zhangfei Gao <zhangfei.gao@linaro.org> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Mark Brown <broonie@kernel.org> Cc: Andy Green <andy@warmcat.com> Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: John Stutlz <john.stultz@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* k3dma: Fix "nobody cared" message seen on any errorAndy Green2016-08-311-3/+5
| | | | | | | | | | | | | | | | | | | | | | | As it was before, as soon as the DMAC IP felt there was an error he would return IRQ_NONE since no actual transfer had completed. After spinning on that for 100K interrupts, Linux yanks the IRQ with a "nobody cared" error. This patch lets it handle the interrupt and keep the IRQ alive. Cc: Zhangfei Gao <zhangfei.gao@linaro.org> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Mark Brown <broonie@kernel.org> Cc: Andy Green <andy@warmcat.com> Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Andy Green <andy.green@linaro.org> [jstultz: Forward ported to mainline] Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* k3dma: Fix dma err offsetsAndy Green2016-08-311-2/+2
| | | | | | | | | | | | | | | | | | The offsets for ERR1 and ERR2 are wrong actually. That's why you can never clear an error. Cc: Zhangfei Gao <zhangfei.gao@linaro.org> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Mark Brown <broonie@kernel.org> Cc: Andy Green <andy@warmcat.com> Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Andy Green <andy.green@linaro.org> [jstultz: Forward ported to mainline] Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* k3dma: Fix hisi burst clippingAndy Green2016-08-311-1/+1
| | | | | | | | | | | | | | | | | | Max burst len is a 4-bit field, but at the moment it's clipped with a 5-bit constant... reduce it to that which can be expressed Cc: Zhangfei Gao <zhangfei.gao@linaro.org> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Mark Brown <broonie@kernel.org> Cc: Andy Green <andy@warmcat.com> Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Andy Green <andy.green@linaro.org> [jstultz: Forward ported to mainline] Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* Merge branch 'topic/dmaengine_cleanups' into for-linusVinod Koul2016-07-281-0/+5
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| * dmaengine: k3dma: explicitly freeup irqVinod Koul2016-07-161-0/+5
| | | | | | | | | | | | | | | | | | | | | | dmaengine device should explicitly call devm_free_irq() when using devm_request_irq(). The irq is still ON when devices remove is executed and irq should be quiesced before remove is completed. Signed-off-by: Vinod Koul <vinod.koul@intel.com> Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org>
* | dmaengine: k3dma: add missing clk_disable_unprepare() on error in k3_dma_probe()Wei Yongjun2016-07-241-1/+3
|/ | | | | | | | Add the missing clk_disable_unprepare() before return from k3_dma_probe() in the error handling case. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: Remove site specific OOM error messages on kzallocPeter Griffin2016-06-211-6/+4
| | | | | | | | | | If kzalloc() fails it will issue it's own error message including a dump_stack(). So remove the site specific error messages. Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Acked-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: Add an enum for the dmaengine alignment constraintsMaxime Ripard2015-08-051-2/+1
| | | | | | | | | | | | | | Most drivers need to set constraints on the buffer alignment for async tx operations. However, even though it is documented, some drivers either use a defined constant that is not matching what the alignment variable expects (like DMA_BUSWIDTH_* constants) or fill the alignment in bytes instead of power of two. Add a new enum for these alignments that matches what the framework expects, and convert the drivers to it. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* Merge branch 'topic/alloc_removal' into for-linusVinod Koul2015-03-181-6/+0
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| * dmaengine: k3dma: remove device_alloc_chan_resources handlerVinod Koul2015-03-181-6/+0
| | | | | | | | | | | | | | | | Now that device_alloc_chan_resources handler in not mandatory, remove dummy implementations Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* | dmaengine: constify of_device_id arrayFabian Frederick2015-03-181-1/+1
|/ | | | | | | | of_device_id is always used as const. (See driver.of_match_table and open firmware functions) Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: k3: fix duplicate function definitionArnd Bergmann2015-01-131-3/+3
| | | | | | | | | | | | | | | | | | | Commit db08425ebd51f ("dmaengine: k3: Split device_control") introduced two new helper functions, which unfortunately have the same names as the existing suspend/resume functions, resulting in a build error when CONFIG_PM_SLEEP is enabled: drivers/dma/k3dma.c:823:12: error: conflicting types for 'k3_dma_resume' static int k3_dma_resume(struct device *dev) ^ drivers/dma/k3dma.c:625:12: note: previous definition of 'k3_dma_resume' was here static int k3_dma_resume(struct dma_chan *chan) ^ Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: db08425ebd51f ("dmaengine: k3: Split device_control") Reported-by: Mark Brown <broonie@kernel.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: k3: Fix duplicated function name and allmodconfig buildKrzysztof Kozlowski2015-01-131-4/+4
| | | | | | | | | | | | While splitting device control in db08425ebd51 ("dmaengine: k3: Split device_control") new function with the same 'k3_dma_resume' name was added, leading to build error: drivers/dma/k3dma.c:823:12: error: conflicting types for ‘k3_dma_resume’ drivers/dma/k3dma.c:625:12: note: previous definition of ‘k3_dma_resume’ was here Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: k3: Split device_controlMaxime Ripard2014-12-221-90/+107
| | | | | | | | | Split the device_control callback of the Hisilicon K3 DMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: k3dma: Add CONFIG_PM_SLEEP to suspend/resume functionsJingoo Han2014-11-171-0/+2
| | | | | | | | | | | | | | Add CONFIG_PM_SLEEP to suspend/resume functions to fix the following build warning when CONFIG_PM_SLEEP is not selected. This is because sleep PM callbacks defined by SIMPLE_DEV_PM_OPS are only used when the CONFIG_PM_SLEEP is enabled. drivers/dma/k3dma.c:790:12: warning: 'k3_dma_suspend' defined but not used [-Wunused-function] drivers/dma/k3dma.c:806:12: warning: 'k3_dma_resume' defined but not used [-Wunused-function] Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: Remove .owner field for driverKiran Padwal2014-11-061-1/+0
| | | | | | | | | | | | | | | | There is no need to init .owner field. Based on the patch from Peter Griffin <peter.griffin@linaro.org> "mmc: remove .owner field for drivers using module_platform_driver" This patch removes the superflous .owner field for drivers which use the module_platform_driver API, as this is overriden in platform_driver_register anyway." Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com> [for nvidia] Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: k3: Remove chancnt affectationsMaxime Ripard2014-11-061-1/+0
| | | | | | | | | | | chanctnt is already filled by dma_async_device_register, which uses the channel list to know how much channels there is. Since it's already filled, we can safely remove it from the drivers' probe function. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: k3dma: fix sparse warningsZhangfei Gao2014-01-201-2/+2
| | | | | | | | | Fix sparse warnings: drivers/dma/k3dma.c:480:20: warning: Using plain integer as NULL pointer drivers/dma/k3dma.c:820:1: warning: symbol 'k3_dma_pmops' was not declared. Should it be static? Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: k3dma: use DMA_COMPLETE for dma completion statusVinod Koul2013-10-251-1/+1
| | | | | | | Acked-by: Dan Williams <dan.j.williams@intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dma: misc: remove deprecated IRQF_DISABLEDMichael Opdenacker2013-10-131-1/+1
| | | | | | | | | This patch proposes to remove the use of the IRQF_DISABLED flag It's a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dma: k3dma: use devm_ioremap_resource() instead of devm_request_and_ioremap()Jingoo Han2013-09-021-3/+3
| | | | | | | | | Use devm_ioremap_resource() because devm_request_and_ioremap() is obsoleted by devm_ioremap_resource(). Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: Add hisilicon k3 DMA engine driverZhangfei Gao2013-08-281-0/+837
Add dmaengine driver for hisilicon k3 platform based on virt_dma Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Tested-by: Kai Yang <jean.yangkai@huawei.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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