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 static inline int dma_get_cache_alignment(void)
  20 {
  21         return 1 << L1_CACHE_SHIFT;
  22 }
  23
  24 static inline int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
  25 {
  26         return 0;
  27 }
  28
  29 extern void *dma_alloc_coherent(struct device *, size_t,
  30                                 dma_addr_t *, gfp_t);
  31 extern void dma_free_coherent(struct device *, size_t,
  32                               void *, dma_addr_t);
  33
  34 static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
  35                                           dma_addr_t *handle, gfp_t flag)
  36 {
  37         return dma_alloc_coherent(dev, size, handle, flag);
  38 }
  39 static inline void dma_free_noncoherent(struct device *dev, size_t size,
  40                                         void *addr, dma_addr_t handle)
  41 {
  42         dma_free_coherent(dev, size, addr, handle);
  43 }
  44 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  45                                   enum dma_data_direction dir)
  46 {
  47         /* we use coherent allocation, so not much to do here. */
  48 }
  49
  50 extern dma_addr_t dma_map_single(struct device *, void *, size_t,
  51                                  enum dma_data_direction);
  52 static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
  53                                     size_t size, enum dma_data_direction dir)
  54 {
  55 }
  56
  57 extern dma_addr_t dma_map_page(struct device *, struct page *,
  58                                unsigned long, size_t size,
  59                                enum dma_data_direction);
  60 static inline void dma_unmap_page(struct device *dev, dma_addr_t address,
  61                                   size_t size, enum dma_data_direction dir)
  62 {
  63 }
  64
  65 extern int dma_map_sg(struct device *, struct scatterlist *, int,
  66                       enum dma_data_direction);
  67 static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
  68                                 int nhwentries, enum dma_data_direction dir)
  69 {
  70 }
  71
  72 extern void dma_sync_single_for_device(struct device *, dma_addr_t, size_t,
  73                                        enum dma_data_direction);
  74 extern void dma_sync_sg_for_device(struct device *, struct scatterlist *, int,
  75                                    enum dma_data_direction);
  76
  77 static inline void dma_sync_single_range_for_device(struct device *dev,
  78                 dma_addr_t dma_handle, unsigned long offset, size_t size,
  79                 enum dma_data_direction direction)
  80 {
  81         /* just sync everything for now */
  82         dma_sync_single_for_device(dev, dma_handle, offset + size, direction);
  83 }
  84
  85 static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
  86                                            size_t size, enum dma_data_direction dir)
  87 {
  88 }
  89
  90 static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
  91                                        int nents, enum dma_data_direction dir)
  92 {
  93 }
  94
  95 static inline void dma_sync_single_range_for_cpu(struct device *dev,
  96                 dma_addr_t dma_handle, unsigned long offset, size_t size,
  97                 enum dma_data_direction direction)
  98 {
  99         /* just sync everything for now */
 100         dma_sync_single_for_cpu(dev, dma_handle, offset + size, direction);
 101 }
 102
 103 static inline int dma_mapping_error(struct device *dev, dma_addr_t handle)
 104 {
 105         return 0;
 106 }
 107
 108 #else
 109 #include <asm-generic/dma-mapping-broken.h>
 110 #endif
 111
 112 #endif  /* _M68K_DMA_MAPPING_H */