include/asm-x86/scatterlist_64.h

   1 #ifndef _X8664_SCATTERLIST_H
   2 #define _X8664_SCATTERLIST_H
   3
   4 #include <asm/types.h>
   5
   6 struct scatterlist {
   7 #ifdef CONFIG_DEBUG_SG
   8     unsigned long       sg_magic;
   9 #endif
  10     unsigned long       page_link;
  11     unsigned int        offset;
  12     unsigned int        length;
  13     dma_addr_t          dma_address;
  14     unsigned int        dma_length;
  15 };
  16
  17 #define ARCH_HAS_SG_CHAIN
  18
  19 #define ISA_DMA_THRESHOLD (0x00ffffff)
  20
  21 /* These macros should be used after a pci_map_sg call has been done
  22  * to get bus addresses of each of the SG entries and their lengths.
  23  * You should only work with the number of sg entries pci_map_sg
  24  * returns.
  25  */
  26 #define sg_dma_address(sg)     ((sg)->dma_address)
  27 #define sg_dma_len(sg)         ((sg)->dma_length)
  28
  29 #endif