1#ifndef _X8664_SCATTERLIST_H 2#define _X8664_SCATTERLIST_H 3 4#include <asm/types.h> 5 6struct scatterlist { 7 struct page *page; 8 unsigned int offset; 9 unsigned int length; 10 dma_addr_t dma_address; 11 unsigned int dma_length; 12}; 13 14#define ISA_DMA_THRESHOLD (0x00ffffff) 15 16/* These macros should be used after a pci_map_sg call has been done 17 * to get bus addresses of each of the SG entries and their lengths. 18 * You should only work with the number of sg entries pci_map_sg 19 * returns. 20 */ 21#define sg_dma_address(sg) ((sg)->dma_address) 22#define sg_dma_len(sg) ((sg)->dma_length) 23 24#endif 25