include/asm-x86_64/swiotlb.h

   1 #ifndef _ASM_SWIOTLB_H
   2 #define _ASM_SWTIOLB_H 1
   3
   4 #include <linux/config.h>
   5
   6 /* SWIOTLB interface */
   7
   8 extern dma_addr_t swiotlb_map_single(struct device *hwdev, void *ptr, size_t size,
   9                                       int dir);
  10 extern void swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
  11                                   size_t size, int dir);
  12 extern void swiotlb_sync_single_for_cpu(struct device *hwdev,
  13                                          dma_addr_t dev_addr,
  14                                          size_t size, int dir);
  15 extern void swiotlb_sync_single_for_device(struct device *hwdev,
  16                                             dma_addr_t dev_addr,
  17                                             size_t size, int dir);
  18 extern void swiotlb_sync_sg_for_cpu(struct device *hwdev,
  19                                      struct scatterlist *sg, int nelems,
  20                                      int dir);
  21 extern void swiotlb_sync_sg_for_device(struct device *hwdev,
  22                                         struct scatterlist *sg, int nelems,
  23                                         int dir);
  24 extern int swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg,
  25                       int nents, int direction);
  26 extern void swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg,
  27                          int nents, int direction);
  28 extern int swiotlb_dma_mapping_error(dma_addr_t dma_addr);
  29 extern void *swiotlb_alloc_coherent (struct device *hwdev, size_t size,
  30                                      dma_addr_t *dma_handle, int flags);
  31 extern void swiotlb_free_coherent (struct device *hwdev, size_t size,
  32                                    void *vaddr, dma_addr_t dma_handle);
  33
  34 #ifdef CONFIG_SWIOTLB
  35 extern int swiotlb;
  36 #else
  37 #define swiotlb 0
  38 #endif
  39
  40 #endif