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https://www.kernel.org/doc/html/latest/driver-api/dmaengine/client.html
This returns a cookie can be used to check the progress of DMA engine activity via other DMA engine calls not covered in this document. dmaengine_submit() will not start the DMA operation, it merely adds it to the pending queue. For this, see step 5, dma_async_issue_pending.
https://www.kernel.org/doc/html/v4.19/driver-api/dmaengine/client.html
For cyclic DMA, a callback function may wish to terminate the DMA via dmaengine_terminate_async(). Therefore, it is important that DMA engine drivers drop any locks before calling the callback function which may cause a deadlock. Note that callbacks will always be invoked from the DMA engines tasklet, never from interrupt context.
https://www.kernel.org/doc/html/latest/driver-api/dmaengine/index.html
DMAEngine client documentation¶. This book is a guide to device driver writers on how to use the Slave-DMA API of the DMAEngine. This is applicable only for slave DMA usage only.
https://www.kernel.org/doc/html/latest/driver-api/dmaengine/provider.html
DMA Support in Linux¶ Historically, DMA controller drivers have been implemented using the async TX API, to offload operations such as memory copy, XOR, cryptography, etc., basically any memory to memory operation. Over time, the need for memory to device …
https://patchwork.kernel.org/patch/11315249/
This patch adds a driver for HiSilicon Kunpeng DMA engine. This DMA engine which is an PCIe iEP offers 30 channels, each channel has a send queue, a complete queue and an interrupt to help to do tasks. This DMA engine can do memory copy between memory blocks or …
https://patchwork.kernel.org/project/linux-dmaengine/list/?state=*
Add AMD PassThru DMA Engine driver - - - 0 0 0: 2019-12-27: Sanjay R Mehta: Changes Requested [v2,2/3] dmaengine: ptdma: Register pass-through engine as a DMA resource Add AMD PassThru DMA Engine driver - - - 0 0 0: 2019-12-27: Sanjay R Mehta: Changes Requested [v2,1/3] dmaengine: ptdma: Initial driver for the AMD PassThru DMA engine
http://linux-kernel.2935.n7.nabble.com/PATCH-v7-00-10-DMA-Engine-support-for-AM33XX-td593561i60.html
[PATCH v7 00/10] DMA Engine support for AM33XX ... and it's even implemented by > > each DMA engine, and some may not even support it but require > > polling, ... Someone still needs to do the work to make the non-DMA variants of MUSB coexist in one kernel, but as we discussed erlier, ...
https://forums.xilinx.com/xlnx/attachments/xlnx/ELINUX/13011/2/Linux-DMA-In-Device-Drivers.pdf
The Xilinx kernel has the DMA engine driver turned on by default –The Xilinx DMA core drivers are only visible in the kernel configuration when it is enabled The DMA test for the AXI DMA cores in the Xilinx kernel uses the DMA engine slave API –This test code is …
https://patchwork.kernel.org/project/linux-dmaengine/list/
Add AMD PassThru DMA Engine driver - - - 0 0 0: 2020-01-21: Sanjay R Mehta: New [v2] dmaengine: Create symlinks between DMA channels and slaves [v2] dmaengine: Create symlinks between DMA channels and slaves - - 1: 0 0 0: 2020-01-17: Geert Uytterhoeven: New [v5] dmaengine: hisilicon: Add Kunpeng DMA engine support
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