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Linux kernel mirror (for testing)
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linux
1#ifndef __ASM_SCATTERLIST_H
2#define __ASM_SCATTERLIST_H
3
4struct scatterlist {
5 struct page * page;
6 unsigned int offset;
7 dma_addr_t dma_address;
8 unsigned int length;
9};
10
11/*
12 * These macros should be used after a pci_map_sg call has been done
13 * to get bus addresses of each of the SG entries and their lengths.
14 * You should only work with the number of sg entries pci_map_sg
15 * returns, or alternatively stop on the first sg_dma_len(sg) which
16 * is 0.
17 */
18#define sg_dma_address(sg) ((sg)->dma_address)
19#define sg_dma_len(sg) ((sg)->length)
20
21#define ISA_DMA_THRESHOLD (0x00ffffffUL)
22
23#endif /* __ASM_SCATTERLIST_H */