scatterlist.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:1k
- /*
- * BK Id: SCCS/s.scatterlist.h 1.9 10/15/01 22:51:33 paulus
- */
- #ifdef __KERNEL__
- #ifndef _PPC_SCATTERLIST_H
- #define _PPC_SCATTERLIST_H
- #include <asm/dma.h>
- struct scatterlist {
- char *address; /* Location data is to be transferred to,
- * or NULL for highmem page */
- struct page * page; /* Location for highmem page, if any */
- unsigned int offset; /* for highmem, page offset */
- dma_addr_t dma_address; /* phys/bus dma address */
- unsigned int length; /* length */
- };
- /*
- * These macros should be used after a pci_map_sg call has been done
- * to get bus addresses of each of the SG entries and their lengths.
- * You should only work with the number of sg entries pci_map_sg
- * returns, or alternatively stop on the first sg_dma_len(sg) which
- * is 0.
- */
- #define sg_dma_address(sg) ((sg)->dma_address)
- #define sg_dma_len(sg) ((sg)->length)
- #endif /* !(_PPC_SCATTERLIST_H) */
- #endif /* __KERNEL__ */