mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 01:51:53 +00:00
4565f0170d
dma_get_cache_alignment returns the minimum DMA alignment. Architectures defines it as ARCH_DMA_MINALIGN (formally ARCH_KMALLOC_MINALIGN). So we can unify dma_get_cache_alignment implementations. Note that some architectures implement dma_get_cache_alignment wrongly. dma_get_cache_alignment() should return the minimum DMA alignment. So fully-coherent architectures should return 1. This patch also fixes this issue. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
71 lines
2.6 KiB
C
71 lines
2.6 KiB
C
#ifndef _ASM_DMA_MAPPING_H
|
|
#define _ASM_DMA_MAPPING_H
|
|
|
|
#include <asm/scatterlist.h>
|
|
#include <asm/cache.h>
|
|
#include <asm-generic/dma-coherent.h>
|
|
|
|
void *dma_alloc_noncoherent(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t flag);
|
|
|
|
void dma_free_noncoherent(struct device *dev, size_t size,
|
|
void *vaddr, dma_addr_t dma_handle);
|
|
|
|
void *dma_alloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t flag);
|
|
|
|
void dma_free_coherent(struct device *dev, size_t size,
|
|
void *vaddr, dma_addr_t dma_handle);
|
|
|
|
extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
|
|
enum dma_data_direction direction);
|
|
extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
|
|
size_t size, enum dma_data_direction direction);
|
|
extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
|
|
enum dma_data_direction direction);
|
|
extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
|
|
unsigned long offset, size_t size, enum dma_data_direction direction);
|
|
|
|
static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
|
|
size_t size, enum dma_data_direction direction)
|
|
{
|
|
dma_unmap_single(dev, dma_address, size, direction);
|
|
}
|
|
|
|
extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
|
|
int nhwentries, enum dma_data_direction direction);
|
|
extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
|
|
size_t size, enum dma_data_direction direction);
|
|
extern void dma_sync_single_for_device(struct device *dev,
|
|
dma_addr_t dma_handle, size_t size, enum dma_data_direction direction);
|
|
extern void dma_sync_single_range_for_cpu(struct device *dev,
|
|
dma_addr_t dma_handle, unsigned long offset, size_t size,
|
|
enum dma_data_direction direction);
|
|
extern void dma_sync_single_range_for_device(struct device *dev,
|
|
dma_addr_t dma_handle, unsigned long offset, size_t size,
|
|
enum dma_data_direction direction);
|
|
extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
|
|
int nelems, enum dma_data_direction direction);
|
|
extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
|
|
int nelems, enum dma_data_direction direction);
|
|
extern int dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
|
|
extern int dma_supported(struct device *dev, u64 mask);
|
|
|
|
static inline int
|
|
dma_set_mask(struct device *dev, u64 mask)
|
|
{
|
|
if(!dev->dma_mask || !dma_supported(dev, mask))
|
|
return -EIO;
|
|
|
|
*dev->dma_mask = mask;
|
|
|
|
return 0;
|
|
}
|
|
|
|
extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr);
|
|
|
|
extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
|
|
enum dma_data_direction direction);
|
|
|
|
#endif /* _ASM_DMA_MAPPING_H */
|