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
  19extern void *dma_alloc_coherent(struct device *, size_t,
  20                                dma_addr_t *, gfp_t);
  21extern void dma_free_coherent(struct device *, size_t,
  22                              void *, dma_addr_t);
  23
  24static 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}
  29static 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}
  34static 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
  40extern dma_addr_t dma_map_single(struct device *, void *, size_t,
  41                                 enum dma_data_direction);
  42static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
  43                                    size_t size, enum dma_data_direction dir)
  44{
  45}
  46
  47extern dma_addr_t dma_map_page(struct device *, struct page *,
  48                               unsigned long, size_t size,
  49                               enum dma_data_direction);
  50static inline void dma_unmap_page(struct device *dev, dma_addr_t address,
  51                                  size_t size, enum dma_data_direction dir)
  52{
  53}
  54
  55extern int dma_map_sg(struct device *, struct scatterlist *, int,
  56                      enum dma_data_direction);
  57static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
  58                                int nhwentries, enum dma_data_direction dir)
  59{
  60}
  61
  62extern void dma_sync_single_for_device(struct device *, dma_addr_t, size_t,
  63                                       enum dma_data_direction);
  64extern void dma_sync_sg_for_device(struct device *, struct scatterlist *, int,
  65                                   enum dma_data_direction);
  66
  67static 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
  75static 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
  80static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
  81                                       int nents, enum dma_data_direction dir)
  82{
  83}
  84
  85static 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
  93static 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 */
 103