diff options
author | Russell King | 2015-07-24 10:10:55 +0200 |
---|---|---|
committer | Russell King | 2015-08-01 23:25:04 +0200 |
commit | 1234e3fda9aa24b2d650bbcd9ef09d5f6a12dc86 (patch) | |
tree | ad30b68bfd5c594499e9670dab32d4f2a2eb8a6d /arch/arm/mm/dma.h | |
parent | ARM: 8407/1: switch_to: Remove finish_arch_switch (diff) | |
download | kernel-qcow2-linux-1234e3fda9aa24b2d650bbcd9ef09d5f6a12dc86.tar.gz kernel-qcow2-linux-1234e3fda9aa24b2d650bbcd9ef09d5f6a12dc86.tar.xz kernel-qcow2-linux-1234e3fda9aa24b2d650bbcd9ef09d5f6a12dc86.zip |
ARM: reduce visibility of dmac_* functions
The dmac_* functions are private to the ARM DMA API implementation, and
should not be used by drivers. In order to discourage their use, remove
their prototypes and macros from asm/*.h.
We have to leave dmac_flush_range() behind as Exynos and MSM IOMMU code
use these; once these sites are fixed, this can be moved also.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/dma.h')
-rw-r--r-- | arch/arm/mm/dma.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm/mm/dma.h b/arch/arm/mm/dma.h new file mode 100644 index 000000000000..70ea6852f94e --- /dev/null +++ b/arch/arm/mm/dma.h @@ -0,0 +1,32 @@ +#ifndef DMA_H +#define DMA_H + +#include <asm/glue-cache.h> + +#ifndef MULTI_CACHE +#define dmac_map_area __glue(_CACHE,_dma_map_area) +#define dmac_unmap_area __glue(_CACHE,_dma_unmap_area) + +/* + * These are private to the dma-mapping API. Do not use directly. + * Their sole purpose is to ensure that data held in the cache + * is visible to DMA, or data written by DMA to system memory is + * visible to the CPU. + */ +extern void dmac_map_area(const void *, size_t, int); +extern void dmac_unmap_area(const void *, size_t, int); + +#else + +/* + * These are private to the dma-mapping API. Do not use directly. + * Their sole purpose is to ensure that data held in the cache + * is visible to DMA, or data written by DMA to system memory is + * visible to the CPU. + */ +#define dmac_map_area cpu_cache.dma_map_area +#define dmac_unmap_area cpu_cache.dma_unmap_area + +#endif + +#endif |