arch/sh/include/asm/scatterlist.h

   1 #ifndef __ASM_SH_SCATTERLIST_H
   2 #define __ASM_SH_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;/* for highmem, page offset */
  12     dma_addr_t dma_address;
  13     unsigned int length;
  14 };
  15
  16 #define ISA_DMA_THRESHOLD       PHYS_ADDR_MASK
  17
  18 /* These macros should be used after a pci_map_sg call has been done
  19  * to get bus addresses of each of the SG entries and their lengths.
  20  * You should only work with the number of sg entries pci_map_sg
  21  * returns, or alternatively stop on the first sg_dma_len(sg) which
  22  * is 0.
  23  */
  24 #define sg_dma_address(sg)      ((sg)->dma_address)
  25 #define sg_dma_len(sg)          ((sg)->length)
  26
  27 #endif /* !(__ASM_SH_SCATTERLIST_H) */