include/asm-sh/scatterlist.h

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