[SCSI] enclosure: add support for enclosure services
[linux-2.6] / include / asm-arm / scatterlist.h
1 #ifndef _ASMARM_SCATTERLIST_H
2 #define _ASMARM_SCATTERLIST_H
3
4 #include <asm/memory.h>
5 #include <asm/types.h>
6
7 struct scatterlist {
8 #ifdef CONFIG_DEBUG_SG
9         unsigned long   sg_magic;
10 #endif
11         unsigned long   page_link;
12         unsigned int    offset;         /* buffer offset                 */
13         dma_addr_t      dma_address;    /* dma address                   */
14         unsigned int    length;         /* length                        */
15 };
16
17 /*
18  * These macros should be used after a pci_map_sg call has been done
19  * to get bus addresses of each of the SG entries and their lengths.
20  * You should only work with the number of sg entries pci_map_sg
21  * returns, or alternatively stop on the first sg_dma_len(sg) which
22  * is 0.
23  */
24 #define sg_dma_address(sg)      ((sg)->dma_address)
25 #define sg_dma_len(sg)          ((sg)->length)
26
27 #endif /* _ASMARM_SCATTERLIST_H */