1#ifndef _BLACKFIN_SCATTERLIST_H
2#define _BLACKFIN_SCATTERLIST_H
3
4#include <linux/mm.h>
5
6struct scatterlist {
7	struct page *page;
8	unsigned int offset;
9	dma_addr_t dma_address;
10	unsigned int 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_address(sg) (page_address((sg)->page) + (sg)->offset)
21#define sg_dma_address(sg)      ((sg)->dma_address)
22#define sg_dma_len(sg)          ((sg)->length)
23
24#define ISA_DMA_THRESHOLD	(0xffffffff)
25
26#endif				/* !(_BLACKFIN_SCATTERLIST_H) */
27