LXR linux/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
   6struct scatterlist;
   7
   8#ifndef CONFIG_MMU_SUN3
   9static inline int dma_supported(struct device *dev, u64 mask)
  10{
  11        return 1;
  12}
  13
  14static inline int dma_set_mask(struct device *dev, u64 mask)
  15{
  16        return 0;
  17}
  18
  19static inline int dma_get_cache_alignment(void)
  20{
  21        return 1 << L1_CACHE_SHIFT;
  22}
  23
  24static inline int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
  25{
  26        return 0;
  27}
  28
  29extern void *dma_alloc_coherent(struct device *, size_t,
  30                                dma_addr_t *, gfp_t);
  31extern void dma_free_coherent(struct device *, size_t,
  32                              void *, dma_addr_t);
  33
  34static 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}
  39static 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}
  44static 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
  50extern dma_addr_t dma_map_single(struct device *, void *, size_t,
  51                                 enum dma_data_direction);
  52static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
  53                                    size_t size, enum dma_data_direction dir)
  54{
  55}
  56
  57extern dma_addr_t dma_map_page(struct device *, struct page *,
  58                               unsigned long, size_t size,
  59                               enum dma_data_direction);
  60static inline void dma_unmap_page(struct device *dev, dma_addr_t address,
  61                                  size_t size, enum dma_data_direction dir)
  62{
  63}
  64
  65extern int dma_map_sg(struct device *, struct scatterlist *, int,
  66                      enum dma_data_direction);
  67static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
  68                                int nhwentries, enum dma_data_direction dir)
  69{
  70}
  71
  72extern void dma_sync_single_for_device(struct device *, dma_addr_t, size_t,
  73                                       enum dma_data_direction);
  74extern void dma_sync_sg_for_device(struct device *, struct scatterlist *, int,
  75                                   enum dma_data_direction);
  76
  77static 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
  85static 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
  90static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
  91                                       int nents, enum dma_data_direction dir)
  92{
  93}
  94
  95static 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
 103static 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 */
 113