include/asm-parisc/scatterlist.h

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