dma-direct: handle DMA_ATTR_NO_KERNEL_MAPPING in common code

Browse source

DMA_ATTR_NO_KERNEL_MAPPING is generally implemented by allocating
normal cacheable pages or CMA memory, and then returning the page
pointer as the opaque handle.  Lift that code from the xtensa and
generic dma remapping implementations into the generic dma-direct
code so that we don't even call arch_dma_alloc for these allocations.

Signed-off-by: Christoph Hellwig <hch@lst.de>

...

This commit is contained in:

Christoph Hellwig 2019-06-14 16:17:27 +02:00

parent c2f2124e0d

commit d98849aff8

4 changed files with 19 additions and 18 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

8

arch/xtensa/kernel/pci-dma.c

View file

2

include/linux/dma-noncoherent.h

View file

14

kernel/dma/direct.c

View file

13

kernel/dma/remap.c

View file