| 1 | #ifndef ___ASM_SPARC_DMA_MAPPING_H |
| 2 | #define ___ASM_SPARC_DMA_MAPPING_H |
| 3 | |
| 4 | #include <linux/scatterlist.h> |
| 5 | #include <linux/mm.h> |
| 6 | |
| 7 | #define DMA_ERROR_CODE (~(dma_addr_t)0x0) |
| 8 | |
| 9 | extern int dma_supported(struct device *dev, u64 mask); |
| 10 | extern int dma_set_mask(struct device *dev, u64 dma_mask); |
| 11 | |
| 12 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) |
| 13 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) |
| 14 | #define dma_is_consistent(d, h) (1) |
| 15 | |
| 16 | struct dma_ops { |
| 17 | void *(*alloc_coherent)(struct device *dev, size_t size, |
| 18 | dma_addr_t *dma_handle, gfp_t flag); |
| 19 | void (*free_coherent)(struct device *dev, size_t size, |
| 20 | void *cpu_addr, dma_addr_t dma_handle); |
| 21 | dma_addr_t (*map_page)(struct device *dev, struct page *page, |
| 22 | unsigned long offset, size_t size, |
| 23 | enum dma_data_direction direction); |
| 24 | void (*unmap_page)(struct device *dev, dma_addr_t dma_addr, |
| 25 | size_t size, |
| 26 | enum dma_data_direction direction); |
| 27 | int (*map_sg)(struct device *dev, struct scatterlist *sg, int nents, |
| 28 | enum dma_data_direction direction); |
| 29 | void (*unmap_sg)(struct device *dev, struct scatterlist *sg, |
| 30 | int nhwentries, |
| 31 | enum dma_data_direction direction); |
| 32 | void (*sync_single_for_cpu)(struct device *dev, |
| 33 | dma_addr_t dma_handle, size_t size, |
| 34 | enum dma_data_direction direction); |
| 35 | void (*sync_single_for_device)(struct device *dev, |
| 36 | dma_addr_t dma_handle, size_t size, |
| 37 | enum dma_data_direction direction); |
| 38 | void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg, |
| 39 | int nelems, |
| 40 | enum dma_data_direction direction); |
| 41 | void (*sync_sg_for_device)(struct device *dev, |
| 42 | struct scatterlist *sg, int nents, |
| 43 | enum dma_data_direction dir); |
| 44 | }; |
| 45 | extern const struct dma_ops *dma_ops; |
| 46 | |
| 47 | static inline void *dma_alloc_coherent(struct device *dev, size_t size, |
| 48 | dma_addr_t *dma_handle, gfp_t flag) |
| 49 | { |
| 50 | return dma_ops->alloc_coherent(dev, size, dma_handle, flag); |
| 51 | } |
| 52 | |
| 53 | static inline void dma_free_coherent(struct device *dev, size_t size, |
| 54 | void *cpu_addr, dma_addr_t dma_handle) |
| 55 | { |
| 56 | dma_ops->free_coherent(dev, size, cpu_addr, dma_handle); |
| 57 | } |
| 58 | |
| 59 | static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr, |
| 60 | size_t size, |
| 61 | enum dma_data_direction direction) |
| 62 | { |
| 63 | return dma_ops->map_page(dev, virt_to_page(cpu_addr), |
| 64 | (unsigned long)cpu_addr & ~PAGE_MASK, size, |
| 65 | direction); |
| 66 | } |
| 67 | |
| 68 | static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, |
| 69 | size_t size, |
| 70 | enum dma_data_direction direction) |
| 71 | { |
| 72 | dma_ops->unmap_page(dev, dma_addr, size, direction); |
| 73 | } |
| 74 | |
| 75 | static inline dma_addr_t dma_map_page(struct device *dev, struct page *page, |
| 76 | unsigned long offset, size_t size, |
| 77 | enum dma_data_direction direction) |
| 78 | { |
| 79 | return dma_ops->map_page(dev, page, offset, size, direction); |
| 80 | } |
| 81 | |
| 82 | static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address, |
| 83 | size_t size, |
| 84 | enum dma_data_direction direction) |
| 85 | { |
| 86 | dma_ops->unmap_page(dev, dma_address, size, direction); |
| 87 | } |
| 88 | |
| 89 | static inline int dma_map_sg(struct device *dev, struct scatterlist *sg, |
| 90 | int nents, enum dma_data_direction direction) |
| 91 | { |
| 92 | return dma_ops->map_sg(dev, sg, nents, direction); |
| 93 | } |
| 94 | |
| 95 | static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg, |
| 96 | int nents, enum dma_data_direction direction) |
| 97 | { |
| 98 | dma_ops->unmap_sg(dev, sg, nents, direction); |
| 99 | } |
| 100 | |
| 101 | static inline void dma_sync_single_for_cpu(struct device *dev, |
| 102 | dma_addr_t dma_handle, size_t size, |
| 103 | enum dma_data_direction direction) |
| 104 | { |
| 105 | dma_ops->sync_single_for_cpu(dev, dma_handle, size, direction); |
| 106 | } |
| 107 | |
| 108 | static inline void dma_sync_single_for_device(struct device *dev, |
| 109 | dma_addr_t dma_handle, |
| 110 | size_t size, |
| 111 | enum dma_data_direction direction) |
| 112 | { |
| 113 | if (dma_ops->sync_single_for_device) |
| 114 | dma_ops->sync_single_for_device(dev, dma_handle, size, |
| 115 | direction); |
| 116 | } |
| 117 | |
| 118 | static inline void dma_sync_sg_for_cpu(struct device *dev, |
| 119 | struct scatterlist *sg, int nelems, |
| 120 | enum dma_data_direction direction) |
| 121 | { |
| 122 | dma_ops->sync_sg_for_cpu(dev, sg, nelems, direction); |
| 123 | } |
| 124 | |
| 125 | static inline void dma_sync_sg_for_device(struct device *dev, |
| 126 | struct scatterlist *sg, int nelems, |
| 127 | enum dma_data_direction direction) |
| 128 | { |
| 129 | if (dma_ops->sync_sg_for_device) |
| 130 | dma_ops->sync_sg_for_device(dev, sg, nelems, direction); |
| 131 | } |
| 132 | |
| 133 | static inline void dma_sync_single_range_for_cpu(struct device *dev, |
| 134 | dma_addr_t dma_handle, |
| 135 | unsigned long offset, |
| 136 | size_t size, |
| 137 | enum dma_data_direction dir) |
| 138 | { |
| 139 | dma_sync_single_for_cpu(dev, dma_handle+offset, size, dir); |
| 140 | } |
| 141 | |
| 142 | static inline void dma_sync_single_range_for_device(struct device *dev, |
| 143 | dma_addr_t dma_handle, |
| 144 | unsigned long offset, |
| 145 | size_t size, |
| 146 | enum dma_data_direction dir) |
| 147 | { |
| 148 | dma_sync_single_for_device(dev, dma_handle+offset, size, dir); |
| 149 | } |
| 150 | |
| 151 | |
| 152 | static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) |
| 153 | { |
| 154 | return (dma_addr == DMA_ERROR_CODE); |
| 155 | } |
| 156 | |
| 157 | static inline int dma_get_cache_alignment(void) |
| 158 | { |
| 159 | /* |
| 160 | * no easy way to get cache size on all processors, so return |
| 161 | * the maximum possible, to be safe |
| 162 | */ |
| 163 | return (1 << INTERNODE_CACHE_SHIFT); |
| 164 | } |
| 165 | |
| 166 | #endif |