include/asm-sparc64/dma-mapping.h

   1 #ifndef _ASM_SPARC64_DMA_MAPPING_H
   2 #define _ASM_SPARC64_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 struct dma_ops {
  10         void *(*alloc_coherent)(struct device *dev, size_t size,
  11                                 dma_addr_t *dma_handle, gfp_t flag);
  12         void (*free_coherent)(struct device *dev, size_t size,
  13                               void *cpu_addr, dma_addr_t dma_handle);
  14         dma_addr_t (*map_single)(struct device *dev, void *cpu_addr,
  15                                  size_t size,
  16                                  enum dma_data_direction direction);
  17         void (*unmap_single)(struct device *dev, dma_addr_t dma_addr,
  18                              size_t size,
  19                              enum dma_data_direction direction);
  20         int (*map_sg)(struct device *dev, struct scatterlist *sg, int nents,
  21                       enum dma_data_direction direction);
  22         void (*unmap_sg)(struct device *dev, struct scatterlist *sg,
  23                          int nhwentries,
  24                          enum dma_data_direction direction);
  25         void (*sync_single_for_cpu)(struct device *dev,
  26                                     dma_addr_t dma_handle, size_t size,
  27                                     enum dma_data_direction direction);
  28         void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg,
  29                                 int nelems,
  30                                 enum dma_data_direction direction);
  31 };
  32 extern const struct dma_ops *dma_ops;
  33
  34 extern int dma_supported(struct device *dev, u64 mask);
  35 extern int dma_set_mask(struct device *dev, u64 dma_mask);
  36
  37 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
  38                                        dma_addr_t *dma_handle, gfp_t flag)
  39 {
  40         return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
  41 }
  42
  43 static inline void dma_free_coherent(struct device *dev, size_t size,
  44                                      void *cpu_addr, dma_addr_t dma_handle)
  45 {
  46         dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
  47 }
  48
  49 static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
  50                                         size_t size,
  51                                         enum dma_data_direction direction)
  52 {
  53         return dma_ops->map_single(dev, cpu_addr, size, direction);
  54 }
  55
  56 static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
  57                                     size_t size,
  58                                     enum dma_data_direction direction)
  59 {
  60         dma_ops->unmap_single(dev, dma_addr, size, direction);
  61 }
  62
  63 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
  64                                       unsigned long offset, size_t size,
  65                                       enum dma_data_direction direction)
  66 {
  67         return dma_ops->map_single(dev, page_address(page) + offset,
  68                                    size, direction);
  69 }
  70
  71 static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
  72                                   size_t size,
  73                                   enum dma_data_direction direction)
  74 {
  75         dma_ops->unmap_single(dev, dma_address, size, direction);
  76 }
  77
  78 static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
  79                              int nents, enum dma_data_direction direction)
  80 {
  81         return dma_ops->map_sg(dev, sg, nents, direction);
  82 }
  83
  84 static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
  85                                 int nents, enum dma_data_direction direction)
  86 {
  87         dma_ops->unmap_sg(dev, sg, nents, direction);
  88 }
  89
  90 static inline void dma_sync_single_for_cpu(struct device *dev,
  91                                            dma_addr_t dma_handle, size_t size,
  92                                            enum dma_data_direction direction)
  93 {
  94         dma_ops->sync_single_for_cpu(dev, dma_handle, size, direction);
  95 }
  96
  97 static inline void dma_sync_single_for_device(struct device *dev,
  98                                               dma_addr_t dma_handle,
  99                                               size_t size,
 100                                               enum dma_data_direction direction)
 101 {
 102         /* No flushing needed to sync cpu writes to the device.  */
 103 }
 104
 105 static inline void dma_sync_single_range_for_cpu(struct device *dev,
 106                                                  dma_addr_t dma_handle,
 107                                                  unsigned long offset,
 108                                                  size_t size,
 109                                                  enum dma_data_direction direction)
 110 {
 111         dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction);
 112 }
 113
 114 static inline void dma_sync_single_range_for_device(struct device *dev,
 115                                                     dma_addr_t dma_handle,
 116                                                     unsigned long offset,
 117                                                     size_t size,
 118                                                     enum dma_data_direction direction)
 119 {
 120         /* No flushing needed to sync cpu writes to the device.  */
 121 }
 122
 123
 124 static inline void dma_sync_sg_for_cpu(struct device *dev,
 125                                        struct scatterlist *sg, int nelems,
 126                                        enum dma_data_direction direction)
 127 {
 128         dma_ops->sync_sg_for_cpu(dev, sg, nelems, direction);
 129 }
 130
 131 static inline void dma_sync_sg_for_device(struct device *dev,
 132                                           struct scatterlist *sg, int nelems,
 133                                           enum dma_data_direction direction)
 134 {
 135         /* No flushing needed to sync cpu writes to the device.  */
 136 }
 137
 138 static inline int dma_mapping_error(dma_addr_t dma_addr)
 139 {
 140         return (dma_addr == DMA_ERROR_CODE);
 141 }
 142
 143 static inline int dma_get_cache_alignment(void)
 144 {
 145         /* no easy way to get cache size on all processors, so return
 146          * the maximum possible, to be safe */
 147         return (1 << INTERNODE_CACHE_SHIFT);
 148 }
 149
 150 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 151 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 152 #define dma_is_consistent(d, h) (1)
 153
 154 #endif /* _ASM_SPARC64_DMA_MAPPING_H */