release/src-rt-6.x.4708/linux/linux-2.6.36/arch/m68k/include/asm/dma-mapping.h

   1 #ifndef _M68K_DMA_MAPPING_H
   2 #define _M68K_DMA_MAPPING_H
   3
   4 #include <asm/cache.h>
   5
   6 struct scatterlist;
   7
   8 #ifndef CONFIG_MMU_SUN3
   9 static inline int dma_supported(struct device *dev, u64 mask)
  10 {
  11         return 1;
  12 }
  13
  14 static inline int dma_set_mask(struct device *dev, u64 mask)
  15 {
  16         return 0;
  17 }
  18
  19 extern void *dma_alloc_coherent(struct device *, size_t,
  20                                 dma_addr_t *, gfp_t);
  21 extern void dma_free_coherent(struct device *, size_t,
  22                               void *, dma_addr_t);
  23
  24 static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
  25                                           dma_addr_t *handle, gfp_t flag)
  26 {
  27         return dma_alloc_coherent(dev, size, handle, flag);
  28 }
  29 static inline void dma_free_noncoherent(struct device *dev, size_t size,
  30                                         void *addr, dma_addr_t handle)
  31 {
  32         dma_free_coherent(dev, size, addr, handle);
  33 }
  34 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  35                                   enum dma_data_direction dir)
  36 {
  37         /* we use coherent allocation, so not much to do here. */
  38 }
  39
  40 extern dma_addr_t dma_map_single(struct device *, void *, size_t,
  41                                  enum dma_data_direction);
  42 static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
  43                                     size_t size, enum dma_data_direction dir)
  44 {
  45 }
  46
  47 extern dma_addr_t dma_map_page(struct device *, struct page *,
  48                                unsigned long, size_t size,
  49                                enum dma_data_direction);
  50 static inline void dma_unmap_page(struct device *dev, dma_addr_t address,
  51                                   size_t size, enum dma_data_direction dir)
  52 {
  53 }
  54
  55 extern int dma_map_sg(struct device *, struct scatterlist *, int,
  56                       enum dma_data_direction);
  57 static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
  58                                 int nhwentries, enum dma_data_direction dir)
  59 {
  60 }
  61
  62 extern void dma_sync_single_for_device(struct device *, dma_addr_t, size_t,
  63                                        enum dma_data_direction);
  64 extern void dma_sync_sg_for_device(struct device *, struct scatterlist *, int,
  65                                    enum dma_data_direction);
  66
  67 static inline void dma_sync_single_range_for_device(struct device *dev,
  68                 dma_addr_t dma_handle, unsigned long offset, size_t size,
  69                 enum dma_data_direction direction)
  70 {
  71         /* just sync everything for now */
  72         dma_sync_single_for_device(dev, dma_handle, offset + size, direction);
  73 }
  74
  75 static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
  76                                            size_t size, enum dma_data_direction dir)
  77 {
  78 }
  79
  80 static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
  81                                        int nents, enum dma_data_direction dir)
  82 {
  83 }
  84
  85 static inline void dma_sync_single_range_for_cpu(struct device *dev,
  86                 dma_addr_t dma_handle, unsigned long offset, size_t size,
  87                 enum dma_data_direction direction)
  88 {
  89         /* just sync everything for now */
  90         dma_sync_single_for_cpu(dev, dma_handle, offset + size, direction);
  91 }
  92
  93 static inline int dma_mapping_error(struct device *dev, dma_addr_t handle)
  94 {
  95         return 0;
  96 }
  97
  98 #else
  99 #include <asm-generic/dma-mapping-broken.h>
 100 #endif
 101
 102 #endif  /* _M68K_DMA_MAPPING_H */