1 #ifndef _ASM_DMA_MAPPING_H 2 #define _ASM_DMA_MAPPING_H 3 4 #include <asm/scatterlist.h> 5 #include <asm/cache.h> 6 #include <asm-generic/dma-coherent.h> 7 8 void *dma_alloc_noncoherent(struct device *dev, size_t size, 9 dma_addr_t *dma_handle, gfp_t flag); 10 11 void dma_free_noncoherent(struct device *dev, size_t size, 12 void *vaddr, dma_addr_t dma_handle); 13 14 void *dma_alloc_coherent(struct device *dev, size_t size, 15 dma_addr_t *dma_handle, gfp_t flag); 16 17 void dma_free_coherent(struct device *dev, size_t size, 18 void *vaddr, dma_addr_t dma_handle); 19 20 extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, 21 enum dma_data_direction direction); 22 extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, 23 size_t size, enum dma_data_direction direction); 24 extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, 25 enum dma_data_direction direction); 26 extern dma_addr_t dma_map_page(struct device *dev, struct page *page, 27 unsigned long offset, size_t size, enum dma_data_direction direction); 28 29 static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address, 30 size_t size, enum dma_data_direction direction) 31 { 32 dma_unmap_single(dev, dma_address, size, direction); 33 } 34 35 extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg, 36 int nhwentries, enum dma_data_direction direction); 37 extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, 38 size_t size, enum dma_data_direction direction); 39 extern void dma_sync_single_for_device(struct device *dev, 40 dma_addr_t dma_handle, size_t size, enum dma_data_direction direction); 41 extern void dma_sync_single_range_for_cpu(struct device *dev, 42 dma_addr_t dma_handle, unsigned long offset, size_t size, 43 enum dma_data_direction direction); 44 extern void dma_sync_single_range_for_device(struct device *dev, 45 dma_addr_t dma_handle, unsigned long offset, size_t size, 46 enum dma_data_direction direction); 47 extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, 48 int nelems, enum dma_data_direction direction); 49 extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, 50 int nelems, enum dma_data_direction direction); 51 extern int dma_mapping_error(struct device *dev, dma_addr_t dma_addr); 52 extern int dma_supported(struct device *dev, u64 mask); 53 54 static inline int 55 dma_set_mask(struct device *dev, u64 mask) 56 { 57 if(!dev->dma_mask || !dma_supported(dev, mask)) 58 return -EIO; 59 60 *dev->dma_mask = mask; 61 62 return 0; 63 } 64 65 static inline int 66 dma_get_cache_alignment(void) 67 { 68 /* XXX Largest on any MIPS */ 69 return 128; 70 } 71 72 extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr); 73 74 extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size, 75 enum dma_data_direction direction); 76 77 #endif /* _ASM_DMA_MAPPING_H */ 78