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