release/src-rt-6.x.4708/linux/linux-2.6.36/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 void *dma_alloc_noncoherent(struct device *dev, size_t size,
   9                            dma_addr_t *dma_handle, gfp_t flag);
  10
  11 void dma_free_noncoherent(struct device *dev, size_t size,
  12                          void *vaddr, dma_addr_t dma_handle);
  13
  14 void *dma_alloc_coherent(struct device *dev, size_t size,
  15                            dma_addr_t *dma_handle, gfp_t flag);
  16
  17 void dma_free_coherent(struct device *dev, size_t size,
  18                          void *vaddr, dma_addr_t dma_handle);
  19
  20 extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
  21         enum dma_data_direction direction);
  22 extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
  23         size_t size, enum dma_data_direction direction);
  24 extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
  25         enum dma_data_direction direction);
  26 extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
  27         unsigned long offset, size_t size, enum dma_data_direction direction);
  28
  29 static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
  30         size_t size, enum dma_data_direction direction)
  31 {
  32         dma_unmap_single(dev, dma_address, size, direction);
  33 }
  34
  35 extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
  36         int nhwentries, enum dma_data_direction direction);
  37 extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
  38         size_t size, enum dma_data_direction direction);
  39 extern void dma_sync_single_for_device(struct device *dev,
  40         dma_addr_t dma_handle, size_t size, enum dma_data_direction direction);
  41 extern void dma_sync_single_range_for_cpu(struct device *dev,
  42         dma_addr_t dma_handle, unsigned long offset, size_t size,
  43         enum dma_data_direction direction);
  44 extern void dma_sync_single_range_for_device(struct device *dev,
  45         dma_addr_t dma_handle, unsigned long offset, size_t size,
  46         enum dma_data_direction direction);
  47 extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
  48         int nelems, enum dma_data_direction direction);
  49 extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
  50         int nelems, enum dma_data_direction direction);
  51 extern int dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
  52 extern int dma_supported(struct device *dev, u64 mask);
  53
  54 static inline int
  55 dma_set_mask(struct device *dev, u64 mask)
  56 {
  57         if(!dev->dma_mask || !dma_supported(dev, mask))
  58                 return -EIO;
  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 #endif /* _ASM_DMA_MAPPING_H */