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 #ifndef CONFIG_SGI_IP27 /* Kludge to fix 2.6.39 build for IP27 */ 9 #include <dma-coherence.h> 10 #endif 11 12 extern struct dma_map_ops *mips_dma_map_ops; 13 14 static inline struct dma_map_ops *get_dma_ops(struct device *dev) 15 { 16 if (dev && dev->archdata.dma_ops) 17 return dev->archdata.dma_ops; 18 else 19 return mips_dma_map_ops; 20 } 21 22 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) 23 { 24 if (!dev->dma_mask) 25 return 0; 26 27 return addr + size <= *dev->dma_mask; 28 } 29 30 static inline void dma_mark_clean(void *addr, size_t size) {} 31 32 #include <asm-generic/dma-mapping-common.h> 33 34 static inline int dma_supported(struct device *dev, u64 mask) 35 { 36 struct dma_map_ops *ops = get_dma_ops(dev); 37 return ops->dma_supported(dev, mask); 38 } 39 40 static inline int dma_mapping_error(struct device *dev, u64 mask) 41 { 42 struct dma_map_ops *ops = get_dma_ops(dev); 43 return ops->mapping_error(dev, mask); 44 } 45 46 static inline int 47 dma_set_mask(struct device *dev, u64 mask) 48 { 49 if(!dev->dma_mask || !dma_supported(dev, mask)) 50 return -EIO; 51 52 *dev->dma_mask = mask; 53 54 return 0; 55 } 56 57 extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size, 58 enum dma_data_direction direction); 59 60 #define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL) 61 62 static inline void *dma_alloc_attrs(struct device *dev, size_t size, 63 dma_addr_t *dma_handle, gfp_t gfp, 64 struct dma_attrs *attrs) 65 { 66 void *ret; 67 struct dma_map_ops *ops = get_dma_ops(dev); 68 69 ret = ops->alloc(dev, size, dma_handle, gfp, attrs); 70 71 debug_dma_alloc_coherent(dev, size, *dma_handle, ret); 72 73 return ret; 74 } 75 76 #define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL) 77 78 static inline void dma_free_attrs(struct device *dev, size_t size, 79 void *vaddr, dma_addr_t dma_handle, 80 struct dma_attrs *attrs) 81 { 82 struct dma_map_ops *ops = get_dma_ops(dev); 83 84 ops->free(dev, size, vaddr, dma_handle, attrs); 85 86 debug_dma_free_coherent(dev, size, vaddr, dma_handle); 87 } 88 89 90 void *dma_alloc_noncoherent(struct device *dev, size_t size, 91 dma_addr_t *dma_handle, gfp_t flag); 92 93 void dma_free_noncoherent(struct device *dev, size_t size, 94 void *vaddr, dma_addr_t dma_handle); 95 96 #endif /* _ASM_DMA_MAPPING_H */ 97