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1da177e4 LT |
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 | struct page *page; /* buffer page */ | |
9 | unsigned int offset; /* buffer offset */ | |
10 | dma_addr_t dma_address; /* dma address */ | |
11 | unsigned int length; /* length */ | |
1da177e4 LT |
12 | }; |
13 | ||
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 /* _ASMARM_SCATTERLIST_H */ |