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   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 struct dma_ops {
   8         void *(*alloc_coherent)(struct device *dev, size_t size,
   9                                 dma_addr_t *dma_handle, gfp_t flag);
  10         void (*free_coherent)(struct device *dev, size_t size,
  11                               void *cpu_addr, dma_addr_t dma_handle);
  12         dma_addr_t (*map_page)(struct device *dev, struct page *page,
  13                                unsigned long offset, size_t size,
  14                                enum dma_data_direction direction);
  15         void (*unmap_page)(struct device *dev, dma_addr_t dma_addr,
  16                            size_t size,
  17                            enum dma_data_direction direction);
  18         int (*map_sg)(struct device *dev, struct scatterlist *sg, int nents,
  19                       enum dma_data_direction direction);
  20         void (*unmap_sg)(struct device *dev, struct scatterlist *sg,
  21                          int nhwentries,
  22                          enum dma_data_direction direction);
  23         void (*sync_single_for_cpu)(struct device *dev,
  24                                     dma_addr_t dma_handle, size_t size,
  25                                     enum dma_data_direction direction);
  26         void (*sync_single_for_device)(struct device *dev,
  27                                        dma_addr_t dma_handle, size_t size,
  28                                        enum dma_data_direction direction);
  29         void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg,
  30                                 int nelems,
  31                                 enum dma_data_direction direction);
  32         void (*sync_sg_for_device)(struct device *dev,
  33                                    struct scatterlist *sg, int nents,
  34                                    enum dma_data_direction dir);
  35 };
  36 extern const struct dma_ops *dma_ops;
  37
  38 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
  39                                        dma_addr_t *dma_handle, gfp_t flag)
  40 {
  41         return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
  42 }
  43
  44 static inline void dma_free_coherent(struct device *dev, size_t size,
  45                                      void *cpu_addr, dma_addr_t dma_handle)
  46 {
  47         dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
  48 }
  49
  50 static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
  51                                         size_t size,
  52                                         enum dma_data_direction direction)
  53 {
  54         return dma_ops->map_page(dev, virt_to_page(cpu_addr),
  55                                  (unsigned long)cpu_addr & ~PAGE_MASK, size,
  56                                  direction);
  57 }
  58
  59 static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
  60                                     size_t size,
  61                                     enum dma_data_direction direction)
  62 {
  63         dma_ops->unmap_page(dev, dma_addr, size, direction);
  64 }
  65
  66 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
  67                                       unsigned long offset, size_t size,
  68                                       enum dma_data_direction direction)
  69 {
  70         return dma_ops->map_page(dev, page, offset, size, direction);
  71 }
  72
  73 static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
  74                                   size_t size,
  75                                   enum dma_data_direction direction)
  76 {
  77         dma_ops->unmap_page(dev, dma_address, size, direction);
  78 }
  79
  80 static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
  81                              int nents, enum dma_data_direction direction)
  82 {
  83         return dma_ops->map_sg(dev, sg, nents, direction);
  84 }
  85
  86 static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
  87                                 int nents, enum dma_data_direction direction)
  88 {
  89         dma_ops->unmap_sg(dev, sg, nents, direction);
  90 }
  91
  92 static inline void dma_sync_single_for_cpu(struct device *dev,
  93                                            dma_addr_t dma_handle, size_t size,
  94                                            enum dma_data_direction direction)
  95 {
  96         dma_ops->sync_single_for_cpu(dev, dma_handle, size, direction);
  97 }
  98
  99 static inline void dma_sync_single_for_device(struct device *dev,
 100                                               dma_addr_t dma_handle,
 101                                               size_t size,
 102                                               enum dma_data_direction direction)
 103 {
 104         /* No flushing needed to sync cpu writes to the device.  */
 105 }
 106
 107 static inline void dma_sync_sg_for_cpu(struct device *dev,
 108                                        struct scatterlist *sg, int nelems,
 109                                        enum dma_data_direction direction)
 110 {
 111         dma_ops->sync_sg_for_cpu(dev, sg, nelems, direction);
 112 }
 113
 114 static inline void dma_sync_sg_for_device(struct device *dev,
 115                                           struct scatterlist *sg, int nelems,
 116                                           enum dma_data_direction direction)
 117 {
 118         /* No flushing needed to sync cpu writes to the device.  */
 119 }
 120
 121 #endif /* _ASM_SPARC64_DMA_MAPPING_H */