dma-mapping: merge the generic remapping helpers into dma-direct

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Integrate the generic dma remapping implementation into the main flow.
This prepares for architectures like xtensa that use an uncached
segment for pages in the kernel mapping, but can also remap highmem
from CMA.  To simplify that implementation we now always deduct the
page from the physical address via the DMA address instead of the
virtual address.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>

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Christoph Hellwig 2019-10-29 11:06:32 +01:00

parent 34dc0ea6bc

commit 3acac06550

2 changed files with 48 additions and 61 deletions

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60

kernel/dma/direct.c

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49

kernel/dma/remap.c

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