git.oblomov.eu Git - linux-2.6/blob - 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 #define dma_map_page(dev,page,offset,size,dir) \
  27         dma_map_single((dev), page_address(page)+(offset), (size), (dir))
  28
  29 #define dma_unmap_page dma_unmap_single
  30
  31 static inline void
  32 dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
  33                               unsigned long offset, size_t size, int direction)
  34 {
  35         BUG_ON(!valid_dma_direction(direction));
  36         if (dma_ops->sync_single_range_for_cpu) {
  37                 dma_ops->sync_single_range_for_cpu(hwdev, dma_handle, offset, size, direction);
  38         }
  39
  40         flush_write_buffers();
  41 }
  42
  43 static inline void
  44 dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
  45                                  unsigned long offset, size_t size, int direction)
  46 {
  47         BUG_ON(!valid_dma_direction(direction));
  48         if (dma_ops->sync_single_range_for_device)
  49                 dma_ops->sync_single_range_for_device(hwdev, dma_handle,
  50                                                       offset, size, direction);
  51
  52         flush_write_buffers();
  53 }
  54
  55 static inline void
  56 dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
  57                     int nelems, int direction)
  58 {
  59         BUG_ON(!valid_dma_direction(direction));
  60         if (dma_ops->sync_sg_for_cpu)
  61                 dma_ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
  62         flush_write_buffers();
  63 }
  64
  65 static inline void
  66 dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
  67                        int nelems, int direction)
  68 {
  69         BUG_ON(!valid_dma_direction(direction));
  70         if (dma_ops->sync_sg_for_device) {
  71                 dma_ops->sync_sg_for_device(hwdev, sg, nelems, direction);
  72         }
  73
  74         flush_write_buffers();
  75 }
  76
  77 extern int dma_supported(struct device *hwdev, u64 mask);
  78
  79 /* same for gart, swiotlb, and nommu */
  80 static inline int dma_get_cache_alignment(void)
  81 {
  82         return boot_cpu_data.x86_clflush_size;
  83 }
  84
  85 #define dma_is_consistent(d, h) 1
  86
  87 extern int dma_set_mask(struct device *dev, u64 mask);
  88
  89 static inline void
  90 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  91         enum dma_data_direction dir)
  92 {
  93         flush_write_buffers();
  94 }
  95
  96 extern struct device fallback_dev;
  97 extern int panic_on_overflow;
  98
  99 #endif /* _X8664_DMA_MAPPING_H */