include/asm-blackfin/scatterlist.h

   1 #ifndef _BLACKFIN_SCATTERLIST_H
   2 #define _BLACKFIN_SCATTERLIST_H
   3
   4 #include <linux/mm.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;
  12         dma_addr_t dma_address;
  13         unsigned int length;
  14 };
  15
  16 /*
  17  * These macros should be used after a pci_map_sg call has been done
  18  * to get bus addresses of each of the SG entries and their lengths.
  19  * You should only work with the number of sg entries pci_map_sg
  20  * returns, or alternatively stop on the first sg_dma_len(sg) which
  21  * is 0.
  22  */
  23 #define sg_dma_address(sg)      ((sg)->dma_address)
  24 #define sg_dma_len(sg)          ((sg)->length)
  25
  26 #define ISA_DMA_THRESHOLD       (0xffffffff)
  27
  28 #endif                          /* !(_BLACKFIN_SCATTERLIST_H) */