include/asm-sh/scatterlist.h

   1 #ifndef __ASM_SH_SCATTERLIST_H
   2 #define __ASM_SH_SCATTERLIST_H
   3
   4 struct scatterlist {
   5     struct page * page; /* Location for highmem page, if any */
   6     unsigned int offset;/* for highmem, page offset */
   7     dma_addr_t dma_address;
   8     unsigned int length;
   9 };
  10
  11 #define ISA_DMA_THRESHOLD (0x1fffffff)
  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, or alternatively stop on the first sg_dma_len(sg) which
  17  * is 0.
  18  */
  19 #define sg_dma_address(sg)      ((sg)->dma_address)
  20 #define sg_dma_len(sg)          ((sg)->length)
  21
  22 #endif /* !(__ASM_SH_SCATTERLIST_H) */