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         unsigned int    length;
  13         dma_addr_t      dma_address;
  14         unsigned int    dma_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) */