arch/mips/include/asm/dma-mapping.h

   1 #ifndef _ASM_DMA_MAPPING_H
   2 #define _ASM_DMA_MAPPING_H
   3
   4 #include <asm/scatterlist.h>
   5 #include <asm/cache.h>
   6 #include <asm-generic/dma-coherent.h>
   7
   8 #ifndef CONFIG_SGI_IP27 /* Kludge to fix 2.6.39 build for IP27 */
   9 #include <dma-coherence.h>
  10 #endif
  11
  12 extern struct dma_map_ops *mips_dma_map_ops;
  13
  14 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
  15 {
  16         if (dev && dev->archdata.dma_ops)
  17                 return dev->archdata.dma_ops;
  18         else
  19                 return mips_dma_map_ops;
  20 }
  21
  22 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
  23 {
  24         if (!dev->dma_mask)
  25                 return 0;
  26
  27         return addr + size <= *dev->dma_mask;
  28 }
  29
  30 static inline void dma_mark_clean(void *addr, size_t size) {}
  31
  32 #include <asm-generic/dma-mapping-common.h>
  33
  34 static inline int dma_supported(struct device *dev, u64 mask)
  35 {
  36         struct dma_map_ops *ops = get_dma_ops(dev);
  37         return ops->dma_supported(dev, mask);
  38 }
  39
  40 static inline int dma_mapping_error(struct device *dev, u64 mask)
  41 {
  42         struct dma_map_ops *ops = get_dma_ops(dev);
  43
  44         debug_dma_mapping_error(dev, mask);
  45         return ops->mapping_error(dev, mask);
  46 }
  47
  48 static inline int
  49 dma_set_mask(struct device *dev, u64 mask)
  50 {
  51         if(!dev->dma_mask || !dma_supported(dev, mask))
  52                 return -EIO;
  53
  54         *dev->dma_mask = mask;
  55
  56         return 0;
  57 }
  58
  59 extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  60                enum dma_data_direction direction);
  61
  62 #define dma_alloc_coherent(d,s,h,f)     dma_alloc_attrs(d,s,h,f,NULL)
  63
  64 static inline void *dma_alloc_attrs(struct device *dev, size_t size,
  65                                     dma_addr_t *dma_handle, gfp_t gfp,
  66                                     struct dma_attrs *attrs)
  67 {
  68         void *ret;
  69         struct dma_map_ops *ops = get_dma_ops(dev);
  70
  71         ret = ops->alloc(dev, size, dma_handle, gfp, attrs);
  72
  73         debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
  74
  75         return ret;
  76 }
  77
  78 #define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
  79
  80 static inline void dma_free_attrs(struct device *dev, size_t size,
  81                                   void *vaddr, dma_addr_t dma_handle,
  82                                   struct dma_attrs *attrs)
  83 {
  84         struct dma_map_ops *ops = get_dma_ops(dev);
  85
  86         ops->free(dev, size, vaddr, dma_handle, attrs);
  87
  88         debug_dma_free_coherent(dev, size, vaddr, dma_handle);
  89 }
  90
  91
  92 void *dma_alloc_noncoherent(struct device *dev, size_t size,
  93                            dma_addr_t *dma_handle, gfp_t flag);
  94
  95 void dma_free_noncoherent(struct device *dev, size_t size,
  96                          void *vaddr, dma_addr_t dma_handle);
  97
  98 #endif /* _ASM_DMA_MAPPING_H */