File: scatterlist.h

package info (click to toggle)
linux-kernel-headers 2.5.999-test7-bk-17
  • links: PTS
  • area: main
  • in suites: sarge
  • size: 28,268 kB
  • ctags: 214,024
  • sloc: ansic: 324,929; cpp: 783; makefile: 79; asm: 61; sh: 61
file content (25 lines) | stat: -rw-r--r-- 655 bytes parent folder | download | duplicates (2) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
 
#ifdef __KERNEL__
#ifndef _PPC_SCATTERLIST_H
#define _PPC_SCATTERLIST_H

#include <asm/dma.h>

struct scatterlist {
	struct page	*page;
	unsigned int	offset;
	dma_addr_t	dma_address;
	unsigned int	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 /* !(_PPC_SCATTERLIST_H) */
#endif /* __KERNEL__ */