Dave Jiang 47ec7f09bc dmaengine: cookie bypass for out of order completion ... The cookie tracking in dmaengine expects all submissions completed in order. Some DMA devices like Intel DSA can complete submissions out of order, especially if configured with a work queue sharing multiple DMA engines. Add a status DMA_OUT_OF_ORDER that tx_status can be returned for those DMA devices. The user should use callbacks to track the completion rather than the DMA cookie. This would address the issue of dmatest complaining that descriptors are "busy" when the cookie count goes backwards due to out of order completion. Add DMA_COMPLETION_NO_ORDER DMA capability to allow the driver to flag the device's ability to complete operations out of order. Reported-by: Swathi Kovvuri <swathi.kovvuri@intel.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Tested-by: Swathi Kovvuri <swathi.kovvuri@intel.com> Link: https://lore.kernel.org/r/158939557151.20335.12404113976045569870.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>		2020-06-17 19:45:14 +05:30
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client.rst	dmaengine: doc: fix warnings/issues of client.rst	2020-02-13 20:35:24 +05:30
dmatest.rst	Documentation: dmaengine: clean up description of dmatest usage	2019-07-05 12:21:01 +05:30
index.rst	docs: prevent warnings due to autosectionlabel	2020-03-20 17:01:29 -06:00
provider.rst	dmaengine: cookie bypass for out of order completion	2020-06-17 19:45:14 +05:30
pxa_dma.rst	dmaengine: doc: ReSTize pxa_dma doc	2017-11-05 10:03:34 -07:00