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/cache.h>
   6#include <asm-generic/dma-coherent.h>
   7
   8void *dma_alloc_noncoherent(struct device *dev, size_t size,
   9                           dma_addr_t *dma_handle, gfp_t flag);
  10
  11void dma_free_noncoherent(struct device *dev, size_t size,
  12                         void *vaddr, dma_addr_t dma_handle);
  13
  14void *dma_alloc_coherent(struct device *dev, size_t size,
  15                           dma_addr_t *dma_handle, gfp_t flag);
  16
  17void dma_free_coherent(struct device *dev, size_t size,
  18                         void *vaddr, dma_addr_t dma_handle);
  19
  20extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
  21        enum dma_data_direction direction);
  22extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
  23        size_t size, enum dma_data_direction direction);
  24extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
  25        enum dma_data_direction direction);
  26extern 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
  29static 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
  35extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
  36        int nhwentries, enum dma_data_direction direction);
  37extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
  38        size_t size, enum dma_data_direction direction);
  39extern void dma_sync_single_for_device(struct device *dev,
  40        dma_addr_t dma_handle, size_t size, enum dma_data_direction direction);
  41extern 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);
  44extern 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);
  47extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
  48        int nelems, enum dma_data_direction direction);
  49extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
  50        int nelems, enum dma_data_direction direction);
  51extern int dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
  52extern int dma_supported(struct device *dev, u64 mask);
  53
  54static inline int
  55dma_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
  65static inline int
  66dma_get_cache_alignment(void)
  67{
  68        /* XXX Largest on any MIPS */
  69        return 128;
  70}
  71
  72extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr);
  73
  74extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  75               enum dma_data_direction direction);
  76
  77#endif /* _ASM_DMA_MAPPING_H */
  78