include/asm-nios2nommu/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
   7 void *dma_alloc_noncoherent(struct device *dev, size_t size,
   8                            dma_addr_t *dma_handle, gfp_t flag);
   9
  10 void dma_free_noncoherent(struct device *dev, size_t size,
  11                          void *vaddr, dma_addr_t dma_handle);
  12
  13 void *dma_alloc_coherent(struct device *dev, size_t size,
  14                            dma_addr_t *dma_handle, gfp_t flag);
  15
  16 void dma_free_coherent(struct device *dev, size_t size,
  17                          void *vaddr, dma_addr_t dma_handle);
  18
  19 extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
  20         enum dma_data_direction direction);
  21 extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
  22         size_t size, enum dma_data_direction direction);
  23 extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
  24         enum dma_data_direction direction);
  25 extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
  26         unsigned long offset, size_t size, enum dma_data_direction direction);
  27 extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
  28         size_t size, enum dma_data_direction direction);
  29 extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
  30         int nhwentries, enum dma_data_direction direction);
  31 extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
  32         size_t size, enum dma_data_direction direction);
  33 extern void dma_sync_single_for_device(struct device *dev,
  34         dma_addr_t dma_handle, size_t size, enum dma_data_direction direction);
  35 extern void dma_sync_single_range_for_cpu(struct device *dev,
  36         dma_addr_t dma_handle, unsigned long offset, size_t size,
  37         enum dma_data_direction direction);
  38 extern void dma_sync_single_range_for_device(struct device *dev,
  39         dma_addr_t dma_handle, unsigned long offset, size_t size,
  40         enum dma_data_direction direction);
  41 extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
  42         int nelems, enum dma_data_direction direction);
  43 extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
  44         int nelems, enum dma_data_direction direction);
  45 extern int dma_mapping_error(dma_addr_t dma_addr);
  46 extern int dma_supported(struct device *dev, u64 mask);
  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 static inline int
  60 dma_get_cache_alignment(void)
  61 {
  62         /* XXX Largest on any MIPS */
  63         return 128;
  64 }
  65
  66 extern int dma_is_consistent(dma_addr_t dma_addr);
  67
  68 extern void dma_cache_sync(void *vaddr, size_t size,
  69                enum dma_data_direction direction);
  70
  71 #define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
  72
  73 extern int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
  74         dma_addr_t device_addr, size_t size, int flags);
  75 extern void dma_release_declared_memory(struct device *dev);
  76 extern void * dma_mark_declared_memory_occupied(struct device *dev,
  77         dma_addr_t device_addr, size_t size);
  78
  79 #endif /* _ASM_DMA_MAPPING_H */