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   1 #ifndef _ASM_SWIOTLB_H
   2 #define _ASM_SWTIOLB_H 1
   3
   4 #include <linux/config.h>
   5
   6 #include <asm/dma-mapping.h>
   7
   8 /* SWIOTLB interface */
   9
  10 extern dma_addr_t swiotlb_map_single(struct device *hwdev, void *ptr,
  11                                      size_t size, int dir);
  12 extern void *swiotlb_alloc_coherent(struct device *hwdev, size_t size,
  13                        dma_addr_t *dma_handle, gfp_t flags);
  14 extern void swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
  15                                   size_t size, int dir);
  16 extern void swiotlb_sync_single_for_cpu(struct device *hwdev,
  17                                          dma_addr_t dev_addr,
  18                                          size_t size, int dir);
  19 extern void swiotlb_sync_single_for_device(struct device *hwdev,
  20                                             dma_addr_t dev_addr,
  21                                             size_t size, int dir);
  22 extern void swiotlb_sync_single_range_for_cpu(struct device *hwdev,
  23                                               dma_addr_t dev_addr,
  24                                               unsigned long offset,
  25                                               size_t size, int dir);
  26 extern void swiotlb_sync_single_range_for_device(struct device *hwdev,
  27                                                  dma_addr_t dev_addr,
  28                                                  unsigned long offset,
  29                                                  size_t size, int dir);
  30 extern void swiotlb_sync_sg_for_cpu(struct device *hwdev,
  31                                      struct scatterlist *sg, int nelems,
  32                                      int dir);
  33 extern void swiotlb_sync_sg_for_device(struct device *hwdev,
  34                                         struct scatterlist *sg, int nelems,
  35                                         int dir);
  36 extern int swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg,
  37                       int nents, int direction);
  38 extern void swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg,
  39                          int nents, int direction);
  40 extern int swiotlb_dma_mapping_error(dma_addr_t dma_addr);
  41 extern void swiotlb_free_coherent (struct device *hwdev, size_t size,
  42                                    void *vaddr, dma_addr_t dma_handle);
  43 extern int swiotlb_dma_supported(struct device *hwdev, u64 mask);
  44 extern void swiotlb_init(void);
  45
  46 #ifdef CONFIG_SWIOTLB
  47 extern int swiotlb;
  48 #else
  49 #define swiotlb 0
  50 #endif
  51
  52 extern void pci_swiotlb_init(void);
  53
  54 #endif /* _ASM_SWTIOLB_H */