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 static inline int dma_supported(struct device *dev, u64 mask)
   9 {
  10         return 1;
  11 }
  12
  13 static inline int dma_set_mask(struct device *dev, u64 mask)
  14 {
  15         return 0;
  16 }
  17
  18 extern void *dma_alloc_coherent(struct device *, size_t,
  19                                 dma_addr_t *, gfp_t);
  20 extern void dma_free_coherent(struct device *, size_t,
  21                               void *, dma_addr_t);
  22
  23 static inline void *dma_alloc_attrs(struct device *dev, size_t size,
  24                                     dma_addr_t *dma_handle, gfp_t flag,
  25                                     struct dma_attrs *attrs)
  26 {
  27         /* attrs is not supported and ignored */
  28         return dma_alloc_coherent(dev, size, dma_handle, flag);
  29 }
  30
  31 static inline void dma_free_attrs(struct device *dev, size_t size,
  32                                   void *cpu_addr, dma_addr_t dma_handle,
  33                                   struct dma_attrs *attrs)
  34 {
  35         /* attrs is not supported and ignored */
  36         dma_free_coherent(dev, size, cpu_addr, dma_handle);
  37 }
  38
  39 static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
  40                                           dma_addr_t *handle, gfp_t flag)
  41 {
  42         return dma_alloc_coherent(dev, size, handle, flag);
  43 }
  44 static inline void dma_free_noncoherent(struct device *dev, size_t size,
  45                                         void *addr, dma_addr_t handle)
  46 {
  47         dma_free_coherent(dev, size, addr, handle);
  48 }
  49 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  50                                   enum dma_data_direction dir)
  51 {
  52         /* we use coherent allocation, so not much to do here. */
  53 }
  54
  55 extern dma_addr_t dma_map_single(struct device *, void *, size_t,
  56                                  enum dma_data_direction);
  57 static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
  58                                     size_t size, enum dma_data_direction dir)
  59 {
  60 }
  61
  62 extern dma_addr_t dma_map_page(struct device *, struct page *,
  63                                unsigned long, size_t size,
  64                                enum dma_data_direction);
  65 static inline void dma_unmap_page(struct device *dev, dma_addr_t address,
  66                                   size_t size, enum dma_data_direction dir)
  67 {
  68 }
  69
  70 extern int dma_map_sg(struct device *, struct scatterlist *, int,
  71                       enum dma_data_direction);
  72 static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
  73                                 int nhwentries, enum dma_data_direction dir)
  74 {
  75 }
  76
  77 extern void dma_sync_single_for_device(struct device *, dma_addr_t, size_t,
  78                                        enum dma_data_direction);
  79 extern void dma_sync_sg_for_device(struct device *, struct scatterlist *, int,
  80                                    enum dma_data_direction);
  81
  82 static inline void dma_sync_single_range_for_device(struct device *dev,
  83                 dma_addr_t dma_handle, unsigned long offset, size_t size,
  84                 enum dma_data_direction direction)
  85 {
  86         /* just sync everything for now */
  87         dma_sync_single_for_device(dev, dma_handle, offset + size, direction);
  88 }
  89
  90 static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
  91                                            size_t size, enum dma_data_direction dir)
  92 {
  93 }
  94
  95 static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
  96                                        int nents, enum dma_data_direction dir)
  97 {
  98 }
  99
 100 static inline void dma_sync_single_range_for_cpu(struct device *dev,
 101                 dma_addr_t dma_handle, unsigned long offset, size_t size,
 102                 enum dma_data_direction direction)
 103 {
 104         /* just sync everything for now */
 105         dma_sync_single_for_cpu(dev, dma_handle, offset + size, direction);
 106 }
 107
 108 static inline int dma_mapping_error(struct device *dev, dma_addr_t handle)
 109 {
 110         return 0;
 111 }
 112
 113 /* drivers/base/dma-mapping.c */
 114 extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
 115                            void *cpu_addr, dma_addr_t dma_addr, size_t size);
 116 extern int dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
 117                                   void *cpu_addr, dma_addr_t dma_addr,
 118                                   size_t size);
 119
 120 #define dma_mmap_coherent(d, v, c, h, s) dma_common_mmap(d, v, c, h, s)
 121 #define dma_get_sgtable(d, t, v, h, s) dma_common_get_sgtable(d, t, v, h, s)
 122
 123 #endif  /* _M68K_DMA_MAPPING_H */