include/asm-i386/scatterlist.h

   1 #ifndef _I386_SCATTERLIST_H
   2 #define _I386_SCATTERLIST_H
   3
   4 #include <asm/types.h>
   5
   6 struct scatterlist {
   7     struct page         *page;
   8     unsigned int        offset;
   9     dma_addr_t          dma_address;
  10     unsigned int        length;
  11 };
  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 #define ISA_DMA_THRESHOLD (0x00ffffff)
  22
  23 #endif /* !(_I386_SCATTERLIST_H) */