summaryrefslogblamecommitdiff
path: root/include/asm-arm/scatterlist.h
blob: de2f65eb42ed7cad529e8369c3dce85e505f2127 (plain) (tree) 
1da177e4c3f4











1da177e4c3f4













1
2
3
4
5
6
7
8
9
10
11

12
13
14
15
16
17
18
19
20
21
22
23
24











                                                                           












                                                                    
#ifndef _ASMARM_SCATTERLIST_H
#define _ASMARM_SCATTERLIST_H

#include <asm/memory.h>
#include <asm/types.h>

struct scatterlist {
	struct page	*page;		/* buffer page			 */
	unsigned int	offset;		/* buffer offset		 */
	dma_addr_t	dma_address;	/* dma address			 */
	unsigned int	length;		/* length			 */
};

/*
 * These macros should be used after a pci_map_sg call has been done
 * to get bus addresses of each of the SG entries and their lengths.
 * You should only work with the number of sg entries pci_map_sg
 * returns, or alternatively stop on the first sg_dma_len(sg) which
 * is 0.
 */
#define sg_dma_address(sg)      ((sg)->dma_address)
#define sg_dma_len(sg)          ((sg)->length)

#endif /* _ASMARM_SCATTERLIST_H */