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
   8static inline int dma_supported(struct device *dev, u64 mask)
   9{
  10        return 1;
  11}
  12
  13static inline int dma_set_mask(struct device *dev, u64 mask)
  14{
  15        return 0;
  16}
  17
  18extern void *dma_alloc_coherent(struct device *, size_t,
  19                                dma_addr_t *, gfp_t);
  20extern void dma_free_coherent(struct device *, size_t,
  21                              void *, dma_addr_t);
  22
  23static 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
  31static 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
  39static 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}
  44static 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}
  49static 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
  55extern dma_addr_t dma_map_single(struct device *, void *, size_t,
  56                                 enum dma_data_direction);
  57static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
  58                                    size_t size, enum dma_data_direction dir)
  59{
  60}
  61
  62extern dma_addr_t dma_map_page(struct device *, struct page *,
  63                               unsigned long, size_t size,
  64                               enum dma_data_direction);
  65static inline void dma_unmap_page(struct device *dev, dma_addr_t address,
  66                                  size_t size, enum dma_data_direction dir)
  67{
  68}
  69
  70extern int dma_map_sg(struct device *, struct scatterlist *, int,
  71                      enum dma_data_direction);
  72static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
  73                                int nhwentries, enum dma_data_direction dir)
  74{
  75}
  76
  77extern void dma_sync_single_for_device(struct device *, dma_addr_t, size_t,
  78                                       enum dma_data_direction);
  79extern void dma_sync_sg_for_device(struct device *, struct scatterlist *, int,
  80                                   enum dma_data_direction);
  81
  82static 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
  90static 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
  95static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
  96                                       int nents, enum dma_data_direction dir)
  97{
  98}
  99
 100static 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
 108static inline int dma_mapping_error(struct device *dev, dma_addr_t handle)
 109{
 110        return 0;
 111}
 112
 113/* drivers/base/dma-mapping.c */
 114extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
 115                           void *cpu_addr, dma_addr_t dma_addr, size_t size);
 116extern 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 */
 124