include/asm-arm/scatterlist.h

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