Commit graph

2 commits

Author SHA1 Message Date
Simon Glass
6d39fccc17 dma-mapping: Add header file for ARCH_DMA_MINALIGN
This is defined in the asm/cache.h header file. Update this header file to
include it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Tested-by: Adam Ford <aford173@gmail.com> #da850-evm
2020-06-02 13:06:11 -04:00
Masahiro Yamada
9d86b89c59 dma-mapping: move dma_map_(un)single() to <linux/dma-mapping.h>
The implementation of dma_map_single() and dma_unmap_single() is
exactly the same for all the architectures that support them.

Factor them out to <linux/dma-mapping.h>, and make all drivers to
include <linux/dma-mapping.h> instead of <asm/dma-mapping.h>.

If we need to differentiate them for some architectures, we can
move the generic definitions to <asm-generic/dma-mapping.h>.

Add some comments to the helpers. The concept is quite similar to
the DMA-API of Linux kernel. Drivers are agnostic about what is
going on behind the scene. Just call dma_map_single() before the
DMA, and dma_unmap_single() after it.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2020-02-19 21:27:30 +08:00