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DMA allocations might be subject to certain reqiurements specific to the hardware using the buffers, such as availability of kernel mapping (for contents fix-ups in the driver). The only entity that knows them is the driver, so it must share this knowledge with vb2-dc. This patch extends the alloc_ctx initialization interface to let the driver specify DMA attrs, which are then stored inside the allocation context and will be used for all allocations with that context. As a side effect, all dma_*_coherent() calls are turned into dma_*_attrs() calls, because the attributes need to be carried over through all DMA operations. BUG=chrome-os-partner:38873 TEST=compile Signed-off-by: Tomasz Figa <tfiga@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/265363 Reviewed-by: Pawel Osciak <posciak@chromium.org> Change-Id: I0e6c040cf820c194b6ca6f3e6355217496bd1532 Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com> Signed-off-by: Yakir Yang <ykk@rock-chips.com> |
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