LXR linux/arch/blackfin/include/asm/scatterlist.h

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