include/linux/swiotlb.h

   1 #ifndef __LINUX_SWIOTLB_H
   2 #define __LINUX_SWIOTLB_H
   3
   4 #include <linux/types.h>
   5
   6 struct device;
   7 struct dma_attrs;
   8 struct scatterlist;
   9
  10 extern void
  11 swiotlb_init(void);
  12
  13 extern void
  14 *swiotlb_alloc_coherent(struct device *hwdev, size_t size,
  15                         dma_addr_t *dma_handle, gfp_t flags);
  16
  17 extern void
  18 swiotlb_free_coherent(struct device *hwdev, size_t size,
  19                       void *vaddr, dma_addr_t dma_handle);
  20
  21 extern dma_addr_t
  22 swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir);
  23
  24 extern void
  25 swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
  26                      size_t size, int dir);
  27
  28 extern dma_addr_t
  29 swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
  30                          int dir, struct dma_attrs *attrs);
  31
  32 extern void
  33 swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr,
  34                            size_t size, int dir, struct dma_attrs *attrs);
  35
  36 extern int
  37 swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
  38                int direction);
  39
  40 extern void
  41 swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
  42                  int direction);
  43
  44 extern int
  45 swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
  46                      int dir, struct dma_attrs *attrs);
  47
  48 extern void
  49 swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
  50                        int nelems, int dir, struct dma_attrs *attrs);
  51
  52 extern void
  53 swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
  54                             size_t size, int dir);
  55
  56 extern void
  57 swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
  58                         int nelems, int dir);
  59
  60 extern void
  61 swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
  62                                size_t size, int dir);
  63
  64 extern void
  65 swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
  66                            int nelems, int dir);
  67
  68 extern void
  69 swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
  70                                   unsigned long offset, size_t size, int dir);
  71
  72 extern void
  73 swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
  74                                      unsigned long offset, size_t size,
  75                                      int dir);
  76
  77 extern int
  78 swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
  79
  80 extern int
  81 swiotlb_dma_supported(struct device *hwdev, u64 mask);
  82
  83 #endif /* __LINUX_SWIOTLB_H */