LXR linux/arch/sh/include/asm/dma-mapping.h

   1#ifndef __ASM_SH_DMA_MAPPING_H
   2#define __ASM_SH_DMA_MAPPING_H
   3
   4extern struct dma_map_ops *dma_ops;
   5extern void no_iommu_init(void);
   6
   7static inline struct dma_map_ops *get_dma_ops(struct device *dev)
   8{
   9        return dma_ops;
  10}
  11
  12#include <asm-generic/dma-coherent.h>
  13#include <asm-generic/dma-mapping-common.h>
  14
  15static inline int dma_supported(struct device *dev, u64 mask)
  16{
  17        struct dma_map_ops *ops = get_dma_ops(dev);
  18
  19        if (ops->dma_supported)
  20                return ops->dma_supported(dev, mask);
  21
  22        return 1;
  23}
  24
  25static inline int dma_set_mask(struct device *dev, u64 mask)
  26{
  27        struct dma_map_ops *ops = get_dma_ops(dev);
  28
  29        if (!dev->dma_mask || !dma_supported(dev, mask))
  30                return -EIO;
  31        if (ops->set_dma_mask)
  32                return ops->set_dma_mask(dev, mask);
  33
  34        *dev->dma_mask = mask;
  35
  36        return 0;
  37}
  38
  39void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  40                    enum dma_data_direction dir);
  41
  42#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
  43#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
  44
  45static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
  46{
  47        struct dma_map_ops *ops = get_dma_ops(dev);
  48
  49        debug_dma_mapping_error(dev, dma_addr);
  50        if (ops->mapping_error)
  51                return ops->mapping_error(dev, dma_addr);
  52
  53        return dma_addr == 0;
  54}
  55
  56#define dma_alloc_coherent(d,s,h,f)     dma_alloc_attrs(d,s,h,f,NULL)
  57
  58static inline void *dma_alloc_attrs(struct device *dev, size_t size,
  59                                    dma_addr_t *dma_handle, gfp_t gfp,
  60                                    struct dma_attrs *attrs)
  61{
  62        struct dma_map_ops *ops = get_dma_ops(dev);
  63        void *memory;
  64
  65        if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
  66                return memory;
  67        if (!ops->alloc)
  68                return NULL;
  69
  70        memory = ops->alloc(dev, size, dma_handle, gfp, attrs);
  71        debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
  72
  73        return memory;
  74}
  75
  76#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
  77
  78static inline void dma_free_attrs(struct device *dev, size_t size,
  79                                  void *vaddr, dma_addr_t dma_handle,
  80                                  struct dma_attrs *attrs)
  81{
  82        struct dma_map_ops *ops = get_dma_ops(dev);
  83
  84        if (dma_release_from_coherent(dev, get_order(size), vaddr))
  85                return;
  86
  87        debug_dma_free_coherent(dev, size, vaddr, dma_handle);
  88        if (ops->free)
  89                ops->free(dev, size, vaddr, dma_handle, attrs);
  90}
  91
  92/* arch/sh/mm/consistent.c */
  93extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
  94                                        dma_addr_t *dma_addr, gfp_t flag,
  95                                        struct dma_attrs *attrs);
  96extern void dma_generic_free_coherent(struct device *dev, size_t size,
  97                                      void *vaddr, dma_addr_t dma_handle,
  98                                      struct dma_attrs *attrs);
  99
 100#endif /* __ASM_SH_DMA_MAPPING_H */
 101