1 #ifndef _ASM_DMA_MAPPING_H 2 #define _ASM_DMA_MAPPING_H 3 4 #include <asm/scatterlist.h> 5 #include <asm/cache.h> 6 7 void *dma_alloc_noncoherent(struct device *dev, size_t size, 8 dma_addr_t *dma_handle, gfp_t flag); 9 10 void dma_free_noncoherent(struct device *dev, size_t size, 11 void *vaddr, dma_addr_t dma_handle); 12 13 void *dma_alloc_coherent(struct device *dev, size_t size, 14 dma_addr_t *dma_handle, gfp_t flag); 15 16 void dma_free_coherent(struct device *dev, size_t size, 17 void *vaddr, dma_addr_t dma_handle); 18 19 extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, 20 enum dma_data_direction direction); 21 extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, 22 size_t size, enum dma_data_direction direction); 23 extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, 24 enum dma_data_direction direction); 25 extern dma_addr_t dma_map_page(struct device *dev, struct page *page, 26 unsigned long offset, size_t size, enum dma_data_direction direction); 27 extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address, 28 size_t size, enum dma_data_direction direction); 29 extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg, 30 int nhwentries, enum dma_data_direction direction); 31 extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, 32 size_t size, enum dma_data_direction direction); 33 extern void dma_sync_single_for_device(struct device *dev, 34 dma_addr_t dma_handle, size_t size, enum dma_data_direction direction); 35 extern 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); 38 extern 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); 41 extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, 42 int nelems, enum dma_data_direction direction); 43 extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, 44 int nelems, enum dma_data_direction direction); 45 extern int dma_mapping_error(struct device *dev, dma_addr_t dma_addr); 46 extern int dma_supported(struct device *dev, u64 mask); 47 48 static inline int 49 dma_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 59 static inline int 60 dma_get_cache_alignment(void) 61 { 62 /* XXX Largest on any MIPS */ 63 return 128; 64 } 65 66 extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr); 67 68 extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size, 69 enum dma_data_direction direction); 70 71 #if 0 72 #define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY 73 74 extern int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, 75 dma_addr_t device_addr, size_t size, int flags); 76 extern void dma_release_declared_memory(struct device *dev); 77 extern void * dma_mark_declared_memory_occupied(struct device *dev, 78 dma_addr_t device_addr, size_t size); 79 #endif 80 81 #endif /* _ASM_DMA_MAPPING_H */ 82