arch/sparc/include/asm/dma-mapping.h

   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