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