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 28 static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address, 29 size_t size, enum dma_data_direction direction) 30 { 31 dma_unmap_single(dev, dma_address, size, direction); 32 } 33 34 extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg, 35 int nhwentries, enum dma_data_direction direction); 36 extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, 37 size_t size, enum dma_data_direction direction); 38 extern void dma_sync_single_for_device(struct device *dev, 39 dma_addr_t dma_handle, size_t size, enum dma_data_direction direction); 40 extern void dma_sync_single_range_for_cpu(struct device *dev, 41 dma_addr_t dma_handle, unsigned long offset, size_t size, 42 enum dma_data_direction direction); 43 extern void dma_sync_single_range_for_device(struct device *dev, 44 dma_addr_t dma_handle, unsigned long offset, size_t size, 45 enum dma_data_direction direction); 46 extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, 47 int nelems, enum dma_data_direction direction); 48 extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, 49 int nelems, enum dma_data_direction direction); 50 extern int dma_mapping_error(struct device *dev, dma_addr_t dma_addr); 51 extern int dma_supported(struct device *dev, u64 mask); 52 53 static inline int 54 dma_set_mask(struct device *dev, u64 mask) 55 { 56 if(!dev->dma_mask || !dma_supported(dev, mask)) 57 return -EIO; 58 59 *dev->dma_mask = mask; 60 61 return 0; 62 } 63 64 static inline int 65 dma_get_cache_alignment(void) 66 { 67 /* XXX Largest on any MIPS */ 68 return 128; 69 } 70 71 extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr); 72 73 extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size, 74 enum dma_data_direction direction); 75 76 #if 0 77 #define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY 78 79 extern int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, 80 dma_addr_t device_addr, size_t size, int flags); 81 extern void dma_release_declared_memory(struct device *dev); 82 extern void * dma_mark_declared_memory_occupied(struct device *dev, 83 dma_addr_t device_addr, size_t size); 84 #endif 85 86 #endif /* _ASM_DMA_MAPPING_H */ 87