release/src-rt-6.x/linux/linux-2.6/include/asm-parisc/scatterlist.h

   1 #ifndef _ASM_PARISC_SCATTERLIST_H
   2 #define _ASM_PARISC_SCATTERLIST_H
   3
   4 #include <asm/page.h>
   5 #include <asm/types.h>
   6
   7 struct scatterlist {
   8         struct page *page;
   9         unsigned int offset;
  10
  11         unsigned int length;
  12
  13         /* an IOVA can be 64-bits on some PA-Risc platforms. */
  14         dma_addr_t iova;        /* I/O Virtual Address */
  15         __u32      iova_length; /* bytes mapped */
  16 };
  17
  18 #define sg_virt_addr(sg) ((unsigned long)(page_address(sg->page) + sg->offset))
  19 #define sg_dma_address(sg) ((sg)->iova)
  20 #define sg_dma_len(sg)     ((sg)->iova_length)
  21
  22 #define ISA_DMA_THRESHOLD (~0UL)
  23
  24 #endif /* _ASM_PARISC_SCATTERLIST_H */