include/asm-x86_64/scatterlist.h

   1 #ifndef _X8664_SCATTERLIST_H
   2 #define _X8664_SCATTERLIST_H
   3
   4 struct scatterlist {
   5     struct page         *page;
   6     unsigned int        offset;
   7     unsigned int        length;
   8     dma_addr_t          dma_address;
   9 };
  10
  11 #define ISA_DMA_THRESHOLD (0x00ffffff)
  12
  13 /* These macros should be used after a pci_map_sg call has been done
  14  * to get bus addresses of each of the SG entries and their lengths.
  15  * You should only work with the number of sg entries pci_map_sg
  16  * returns.
  17  */
  18 #define sg_dma_address(sg)     ((sg)->dma_address)
  19 #define sg_dma_len(sg)         ((sg)->length)
  20
  21 #endif