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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1#ifndef __ASM_SH_SCATTERLIST_H
2#define __ASM_SH_SCATTERLIST_H
3
4#include <asm/types.h>
5
6struct scatterlist {
7 struct page * page; /* Location for highmem page, if any */
8 unsigned int offset;/* for highmem, page offset */
9 dma_addr_t dma_address;
10 unsigned int length;
11};
12
13#define ISA_DMA_THRESHOLD (0x1fffffff)
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 /* !(__ASM_SH_SCATTERLIST_H) */