1#ifndef _ASM_DMA_MAPPING_H 2#define _ASM_DMA_MAPPING_H 3 4#include <asm/scatterlist.h> 5#include <asm/cache.h> 6 7void *dma_alloc_noncoherent(struct device *dev, size_t size, 8 dma_addr_t *dma_handle, gfp_t flag); 9 10void dma_free_noncoherent(struct device *dev, size_t size, 11 void *vaddr, dma_addr_t dma_handle); 12 13void *dma_alloc_coherent(struct device *dev, size_t size, 14 dma_addr_t *dma_handle, gfp_t flag); 15 16void dma_free_coherent(struct device *dev, size_t size, 17 void *vaddr, dma_addr_t dma_handle); 18 19extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, 20 enum dma_data_direction direction); 21extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, 22 size_t size, enum dma_data_direction direction); 23extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, 24 enum dma_data_direction direction); 25extern dma_addr_t dma_map_page(struct device *dev, struct page *page, 26 unsigned long offset, size_t size, enum dma_data_direction direction); 27extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address, 28 size_t size, enum dma_data_direction direction); 29extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg, 30 int nhwentries, enum dma_data_direction direction); 31extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, 32 size_t size, enum dma_data_direction direction); 33extern void dma_sync_single_for_device(struct device *dev, 34 dma_addr_t dma_handle, size_t size, enum dma_data_direction direction); 35extern void dma_sync_single_range_for_cpu(struct device *dev, 36 dma_addr_t dma_handle, unsigned long offset, size_t size, 37 enum dma_data_direction direction); 38extern void dma_sync_single_range_for_device(struct device *dev, 39 dma_addr_t dma_handle, unsigned long offset, size_t size, 40 enum dma_data_direction direction); 41extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, 42 int nelems, enum dma_data_direction direction); 43extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, 44 int nelems, enum dma_data_direction direction); 45extern int dma_mapping_error(dma_addr_t dma_addr); 46extern int dma_supported(struct device *dev, u64 mask); 47 48static inline int 49dma_set_mask(struct device *dev, u64 mask) 50{ 51 if(!dev->dma_mask || !dma_supported(dev, mask)) 52 return -EIO; 53 54 *dev->dma_mask = mask; 55 56 return 0; 57} 58 59static inline int 60dma_get_cache_alignment(void) 61{ 62 return 128; 63} 64 65extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr); 66 67extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size, 68 enum dma_data_direction direction); 69 70 71#endif /* _ASM_DMA_MAPPING_H */ 72