include/asm-ppc/scatterlist.h

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