kernel/linux.git/drivers/dma/altera-msgdma.c, branch v6.6.142

dmaengine: altera-msgdma: properly free descriptor in msgdma_free_descriptor

2024-09-08T05:54:46+00:00

[ Upstream commit 54e4ada1a4206f878e345ae01cf37347d803d1b1 ] Remove list_del call in msgdma_chan_desc_cleanup, this should be the role of msgdma_free_descriptor. In consequence replace list_add_tail with list_move_tail in msgdma_free_descriptor. This fixes the path: msgdma_free_chan_resources -> msgdma_free_descriptors -> msgdma_free_desc_list -> msgdma_free_descriptor which does not correctly free the descriptors as first nodes were not removed from the list. Signed-off-by: Olivier Dautricourt Tested-by: Olivier Dautricourt Link: https://lore.kernel.org/r/20240608213216.25087-3-olivierdautricourt@gmail.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: altera-msgdma: use irq variant of spin_lock/unlock while invoking callbacks

2024-09-08T05:54:46+00:00

[ Upstream commit 261d3a85d959841821ca0d69f9d7b0d4087661c4 ] As we first take the lock with spin_lock_irqsave in msgdma_tasklet, Lockdep might complain about this. Inspired by commit 9558cf4ad07e ("dmaengine: zynqmp_dma: fix lockdep warning in tasklet") Signed-off-by: Olivier Dautricourt Tested-by: Olivier Dautricourt Suggested-by: Eric Schwarz Link: https://lore.kernel.org/r/20240608213216.25087-1-olivierdautricourt@gmail.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: altera-msgdma: Fixed some inconsistent function name descriptions

2022-07-06T16:30:06+00:00

Inconsistent function names describing msgdma_chan_remove() and msgdma_dma_remove are modified to msgdma_dev_remove() and msgdma_remove(). Remove some warnings found by running scripts/kernel-doc, which is caused by using 'make W=1'. drivers/dma/altera-msgdma.c:927: warning: expecting prototype for msgdma_dma_remove(). Prototype was for msgdma_remove() instead. drivers/dma/altera-msgdma.c:758: warning: expecting prototype for msgdma_chan_remove(). Prototype was for msgdma_dev_remove() instead. Signed-off-by: Jiapeng Chong Reviewed-by: Stefan Roese Link: https://lore.kernel.org/r/20220706082605.114907-1-jiapeng.chong@linux.alibaba.com Signed-off-by: Vinod Koul

dmaengine: altera-msgdma: Remove useless DMA-32 fallback configuration

2022-02-15T11:23:11+00:00

As stated in [1], dma_set_mask() with a 64-bit mask never fails if dev->dma_mask is non-NULL. So, if it fails, the 32 bits case will also fail for the same reason. Simplify code and remove some dead code accordingly. [1]: https://lore.kernel.org/linux-kernel/YL3vSPK5DXTNvgdx@infradead.org/#t Signed-off-by: Christophe JAILLET Reviewed-by: Stefan Roese Acked-by: Olivier Dautricourt Link: https://lore.kernel.org/r/01058ada3a0dea207212182ca7525060a204f1e1.1642232423.git.christophe.jaillet@wanadoo.fr Signed-off-by: Vinod Koul

dmaengine: altera-msgdma: Correctly handle descriptor callbacks

2021-10-28T17:23:54+00:00

DMA clients can provide one of two types of callbacks. For this reason dmaengine drivers should not directly invoke `callback`, but always use dmaengine_desc_callback_invoke(). This makes sure that both types of callbacks are handled correctly. The altera-msgdma driver currently doesn't do this and only handles the `callback` type callback. If the client used the `callback_result` type callback it will not be called. Fix this by switching to `dmaengine_desc_callback_valid()` and `dmaengine_desc_callback_invoke()`. Signed-off-by: Lars-Peter Clausen Link: https://lore.kernel.org/r/20211025075428.2094-1-lars@metafoo.de Signed-off-by: Vinod Koul

dmaengine: altera-msgdma: make response port optional

2021-07-28T06:55:10+00:00

The response slave port can be disabled in some configuration [1] and csr + MSGDMA_CSR_RESP_FILL_LEVEL will be 0 even if transfer has suceeded. We have to only rely on the interrupts in that scenario. This was tested on cyclone V with the controller resp port disabled. [1] https://www.intel.com/content/www/us/en/programmable/documentation/sfo1400787952932.html 30.3.1.2 30.3.1.3 30.5.5 Fixes: https://forum.rocketboards.org/t/ip-msgdma-linux-driver/1919 Signed-off-by: Olivier Dautricourt Reviewed-by: Stefan Roese Link: https://lore.kernel.org/r/8220756f2191ca08cb21702252d1f2d4f753a7f5.1623898678.git.olivier.dautricourt@orolia.com Signed-off-by: Vinod Koul

dmaengine: altera-msgdma: add OF support

2021-06-16T10:44:28+00:00

This driver had no device tree support. - add compatible field "altr,socfpga-msgdma" - register dma controller with of_dma_controller_register Reviewed-by: Stefan Roese Signed-off-by: Olivier Dautricourt Link: https://lore.kernel.org/r/7459635ba093d87b6bf12413cf7cfe09f6e3019b.1623251990.git.olivier.dautricourt@orolia.com Signed-off-by: Vinod Koul

dmaengine: altera-msgdma: fix kernel-doc style for tasklet

2020-10-08T09:48:37+00:00

Commit 6752e40d669a ("dmaengine: altera-msgdma: convert tasklets to use new tasklet_setup() API") updated driver to use new tasklet_setup() API but missed to update the documentation for the tasklet function. Fixes: 6752e40d669a ("dmaengine: altera-msgdma: convert tasklets to use new tasklet_setup() API") Link: https://lore.kernel.org/r/20201007083113.567559-2-vkoul@kernel.org Signed-off-by: Vinod Koul

dmaengine: altera-msgdma: convert tasklets to use new tasklet_setup() API

2020-09-18T06:48:10+00:00

In preparation for unconditionally passing the struct tasklet_struct pointer to all tasklet callbacks, switch to using the new tasklet_setup() and from_tasklet() to pass the tasklet pointer explicitly. Signed-off-by: Romain Perier Signed-off-by: Allen Pais Link: https://lore.kernel.org/r/20200831103542.305571-2-allen.lkml@gmail.com Signed-off-by: Vinod Koul

dmaengine: altera-msgdma: Fix struct documentation blocks

2020-07-15T12:20:46+00:00

Fix some misspelling/description issues, demote non-kerneldoc header to standard comment block and provide a new description for msgdma_desc_config()'s 'stride' parameter. Fixes the following W=1 kernel build warning(s): drivers/dma/altera-msgdma.c:163: warning: Function parameter or member 'node' not described in 'msgdma_sw_desc' drivers/dma/altera-msgdma.c:163: warning: Function parameter or member 'tx_list' not described in 'msgdma_sw_desc' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'lock' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'dev' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'irq_tasklet' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'pending_list' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'free_list' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'active_list' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'done_list' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'desc_free_cnt' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'idle' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'dmadev' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'dmachan' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'hw_desq' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'sw_desq' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'npendings' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'slave_cfg' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'irq' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'csr' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'desc' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:197: warning: Function parameter or member 'resp' not described in 'msgdma_device' drivers/dma/altera-msgdma.c:265: warning: Function parameter or member 'stride' not described in 'msgdma_desc_config' Signed-off-by: Lee Jones Cc: Stefan Roese Link: https://lore.kernel.org/r/20200714111546.1755231-8-lee.jones@linaro.org Signed-off-by: Vinod Koul