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/dma-coherence.h>
   6 #include <asm/cache.h>
   7 #include <asm-generic/dma-coherent.h>
   8
   9 #ifndef CONFIG_SGI_IP27 /* Kludge to fix 2.6.39 build for IP27 */
  10 #include <dma-coherence.h>
  11 #endif
  12
  13 extern struct dma_map_ops *mips_dma_map_ops;
  14
  15 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
  16 {
  17         if (dev && dev->archdata.dma_ops)
  18                 return dev->archdata.dma_ops;
  19         else
  20                 return mips_dma_map_ops;
  21 }
  22
  23 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
  24 {
  25         if (!dev->dma_mask)
  26                 return false;
  27
  28         return addr + size <= *dev->dma_mask;
  29 }
  30
  31 static inline void dma_mark_clean(void *addr, size_t size) {}
  32
  33 #include <asm-generic/dma-mapping-common.h>
  34
  35 static inline int dma_supported(struct device *dev, u64 mask)
  36 {
  37         struct dma_map_ops *ops = get_dma_ops(dev);
  38         return ops->dma_supported(dev, mask);
  39 }
  40
  41 static inline int dma_mapping_error(struct device *dev, u64 mask)
  42 {
  43         struct dma_map_ops *ops = get_dma_ops(dev);
  44
  45         debug_dma_mapping_error(dev, mask);
  46         return ops->mapping_error(dev, mask);
  47 }
  48
  49 static inline int
  50 dma_set_mask(struct device *dev, u64 mask)
  51 {
  52         struct dma_map_ops *ops = get_dma_ops(dev);
  53
  54         if(!dev->dma_mask || !dma_supported(dev, mask))
  55                 return -EIO;
  56
  57         if (ops->set_dma_mask)
  58                 return ops->set_dma_mask(dev, mask);
  59
  60         *dev->dma_mask = mask;
  61
  62         return 0;
  63 }
  64
  65 extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  66                enum dma_data_direction direction);
  67
  68 #define dma_alloc_coherent(d,s,h,f)     dma_alloc_attrs(d,s,h,f,NULL)
  69
  70 static inline void *dma_alloc_attrs(struct device *dev, size_t size,
  71                                     dma_addr_t *dma_handle, gfp_t gfp,
  72                                     struct dma_attrs *attrs)
  73 {
  74         void *ret;
  75         struct dma_map_ops *ops = get_dma_ops(dev);
  76
  77         ret = ops->alloc(dev, size, dma_handle, gfp, attrs);
  78
  79         debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
  80
  81         return ret;
  82 }
  83
  84 #define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
  85
  86 static inline void dma_free_attrs(struct device *dev, size_t size,
  87                                   void *vaddr, dma_addr_t dma_handle,
  88                                   struct dma_attrs *attrs)
  89 {
  90         struct dma_map_ops *ops = get_dma_ops(dev);
  91
  92         ops->free(dev, size, vaddr, dma_handle, attrs);
  93
  94         debug_dma_free_coherent(dev, size, vaddr, dma_handle);
  95 }
  96
  97
  98 void *dma_alloc_noncoherent(struct device *dev, size_t size,
  99                            dma_addr_t *dma_handle, gfp_t flag);
 100
 101 void dma_free_noncoherent(struct device *dev, size_t size,
 102                          void *vaddr, dma_addr_t dma_handle);
 103
 104 #endif /* _ASM_DMA_MAPPING_H */