include/asm-x86/dma-mapping_64.h

   1 #ifndef _X8664_DMA_MAPPING_H
   2 #define _X8664_DMA_MAPPING_H 1
   3
   4 extern dma_addr_t bad_dma_address;
   5 extern const struct dma_mapping_ops* dma_ops;
   6 extern int iommu_merge;
   7
   8 static inline int dma_mapping_error(dma_addr_t dma_addr)
   9 {
  10         if (dma_ops->mapping_error)
  11                 return dma_ops->mapping_error(dma_addr);
  12
  13         return (dma_addr == bad_dma_address);
  14 }
  15
  16 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
  17 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
  18
  19 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
  20 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
  21
  22 extern void *dma_alloc_coherent(struct device *dev, size_t size,
  23                                 dma_addr_t *dma_handle, gfp_t gfp);
  24 extern void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
  25                               dma_addr_t dma_handle);
  26
  27 static inline dma_addr_t
  28 dma_map_single(struct device *hwdev, void *ptr, size_t size,
  29                int direction)
  30 {
  31         BUG_ON(!valid_dma_direction(direction));
  32         return dma_ops->map_single(hwdev, ptr, size, direction);
  33 }
  34
  35 static inline void
  36 dma_unmap_single(struct device *dev, dma_addr_t addr,size_t size,
  37                  int direction)
  38 {
  39         BUG_ON(!valid_dma_direction(direction));
  40         dma_ops->unmap_single(dev, addr, size, direction);
  41 }
  42
  43 #define dma_map_page(dev,page,offset,size,dir) \
  44         dma_map_single((dev), page_address(page)+(offset), (size), (dir))
  45
  46 #define dma_unmap_page dma_unmap_single
  47
  48 static inline void
  49 dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
  50                         size_t size, int direction)
  51 {
  52         BUG_ON(!valid_dma_direction(direction));
  53         if (dma_ops->sync_single_for_cpu)
  54                 dma_ops->sync_single_for_cpu(hwdev, dma_handle, size,
  55                                              direction);
  56         flush_write_buffers();
  57 }
  58
  59 static inline void
  60 dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
  61                            size_t size, int direction)
  62 {
  63         BUG_ON(!valid_dma_direction(direction));
  64         if (dma_ops->sync_single_for_device)
  65                 dma_ops->sync_single_for_device(hwdev, dma_handle, size,
  66                                                 direction);
  67         flush_write_buffers();
  68 }
  69
  70 static inline void
  71 dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
  72                               unsigned long offset, size_t size, int direction)
  73 {
  74         BUG_ON(!valid_dma_direction(direction));
  75         if (dma_ops->sync_single_range_for_cpu) {
  76                 dma_ops->sync_single_range_for_cpu(hwdev, dma_handle, offset, size, direction);
  77         }
  78
  79         flush_write_buffers();
  80 }
  81
  82 static inline void
  83 dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
  84                                  unsigned long offset, size_t size, int direction)
  85 {
  86         BUG_ON(!valid_dma_direction(direction));
  87         if (dma_ops->sync_single_range_for_device)
  88                 dma_ops->sync_single_range_for_device(hwdev, dma_handle,
  89                                                       offset, size, direction);
  90
  91         flush_write_buffers();
  92 }
  93
  94 static inline void
  95 dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
  96                     int nelems, int direction)
  97 {
  98         BUG_ON(!valid_dma_direction(direction));
  99         if (dma_ops->sync_sg_for_cpu)
 100                 dma_ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
 101         flush_write_buffers();
 102 }
 103
 104 static inline void
 105 dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
 106                        int nelems, int direction)
 107 {
 108         BUG_ON(!valid_dma_direction(direction));
 109         if (dma_ops->sync_sg_for_device) {
 110                 dma_ops->sync_sg_for_device(hwdev, sg, nelems, direction);
 111         }
 112
 113         flush_write_buffers();
 114 }
 115
 116 static inline int
 117 dma_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, int direction)
 118 {
 119         BUG_ON(!valid_dma_direction(direction));
 120         return dma_ops->map_sg(hwdev, sg, nents, direction);
 121 }
 122
 123 static inline void
 124 dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
 125              int direction)
 126 {
 127         BUG_ON(!valid_dma_direction(direction));
 128         dma_ops->unmap_sg(hwdev, sg, nents, direction);
 129 }
 130
 131 extern int dma_supported(struct device *hwdev, u64 mask);
 132
 133 /* same for gart, swiotlb, and nommu */
 134 static inline int dma_get_cache_alignment(void)
 135 {
 136         return boot_cpu_data.x86_clflush_size;
 137 }
 138
 139 #define dma_is_consistent(d, h) 1
 140
 141 extern int dma_set_mask(struct device *dev, u64 mask);
 142
 143 static inline void
 144 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 145         enum dma_data_direction dir)
 146 {
 147         flush_write_buffers();
 148 }
 149
 150 extern struct device fallback_dev;
 151 extern int panic_on_overflow;
 152
 153 #endif /* _X8664_DMA_MAPPING_H */