LXR linux/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
  13extern struct dma_map_ops *mips_dma_map_ops;
  14
  15static 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
  23static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
  24{
  25        if (!dev->dma_mask)
  26                return 0;
  27
  28        return addr + size <= *dev->dma_mask;
  29}
  30
  31static inline void dma_mark_clean(void *addr, size_t size) {}
  32
  33#include <asm-generic/dma-mapping-common.h>
  34
  35static 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
  41static 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
  49static inline int
  50dma_set_mask(struct device *dev, u64 mask)
  51{
  52        if(!dev->dma_mask || !dma_supported(dev, mask))
  53                return -EIO;
  54
  55        *dev->dma_mask = mask;
  56
  57        return 0;
  58}
  59
  60extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  61               enum dma_data_direction direction);
  62
  63#define dma_alloc_coherent(d,s,h,f)     dma_alloc_attrs(d,s,h,f,NULL)
  64
  65static inline void *dma_alloc_attrs(struct device *dev, size_t size,
  66                                    dma_addr_t *dma_handle, gfp_t gfp,
  67                                    struct dma_attrs *attrs)
  68{
  69        void *ret;
  70        struct dma_map_ops *ops = get_dma_ops(dev);
  71
  72        ret = ops->alloc(dev, size, dma_handle, gfp, attrs);
  73
  74        debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
  75
  76        return ret;
  77}
  78
  79#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
  80
  81static inline void dma_free_attrs(struct device *dev, size_t size,
  82                                  void *vaddr, dma_addr_t dma_handle,
  83                                  struct dma_attrs *attrs)
  84{
  85        struct dma_map_ops *ops = get_dma_ops(dev);
  86
  87        ops->free(dev, size, vaddr, dma_handle, attrs);
  88
  89        debug_dma_free_coherent(dev, size, vaddr, dma_handle);
  90}
  91
  92
  93void *dma_alloc_noncoherent(struct device *dev, size_t size,
  94                           dma_addr_t *dma_handle, gfp_t flag);
  95
  96void dma_free_noncoherent(struct device *dev, size_t size,
  97                         void *vaddr, dma_addr_t dma_handle);
  98
  99#endif /* _ASM_DMA_MAPPING_H */
 100