linux/include/asm-generic/dma-mapping-broken.h
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   1#ifndef _ASM_GENERIC_DMA_MAPPING_H
   2#define _ASM_GENERIC_DMA_MAPPING_H
   3
   4/* define the dma api to allow compilation but not linking of
   5 * dma dependent code.  Code that depends on the dma-mapping
   6 * API needs to set 'depends on HAS_DMA' in its Kconfig
   7 */
   8
   9struct scatterlist;
  10
  11extern void *
  12dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
  13                   gfp_t flag);
  14
  15extern void
  16dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
  17                    dma_addr_t dma_handle);
  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
  22extern dma_addr_t
  23dma_map_single(struct device *dev, void *ptr, size_t size,
  24               enum dma_data_direction direction);
  25
  26extern void
  27dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
  28                 enum dma_data_direction direction);
  29
  30extern int
  31dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
  32           enum dma_data_direction direction);
  33
  34extern void
  35dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
  36             enum dma_data_direction direction);
  37
  38extern dma_addr_t
  39dma_map_page(struct device *dev, struct page *page, unsigned long offset,
  40             size_t size, enum dma_data_direction direction);
  41
  42extern void
  43dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
  44               enum dma_data_direction direction);
  45
  46extern void
  47dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
  48                        enum dma_data_direction direction);
  49
  50extern void
  51dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
  52                              unsigned long offset, size_t size,
  53                              enum dma_data_direction direction);
  54
  55extern void
  56dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
  57                    enum dma_data_direction direction);
  58
  59#define dma_sync_single_for_device dma_sync_single_for_cpu
  60#define dma_sync_single_range_for_device dma_sync_single_range_for_cpu
  61#define dma_sync_sg_for_device dma_sync_sg_for_cpu
  62
  63extern int
  64dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
  65
  66extern int
  67dma_supported(struct device *dev, u64 mask);
  68
  69extern int
  70dma_set_mask(struct device *dev, u64 mask);
  71
  72extern int
  73dma_get_cache_alignment(void);
  74
  75extern void
  76dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  77               enum dma_data_direction direction);
  78
  79#endif /* _ASM_GENERIC_DMA_MAPPING_H */
  80
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