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1394f032 BW |
1 | #ifndef _BLACKFIN_SCATTERLIST_H |
2 | #define _BLACKFIN_SCATTERLIST_H | |
3 | ||
4 | #include <linux/mm.h> | |
5 | ||
6 | struct scatterlist { | |
7 | struct page *page; | |
8 | unsigned int offset; | |
9 | dma_addr_t dma_address; | |
10 | unsigned int length; | |
11 | }; | |
12 | ||
13 | /* | |
14 | * These macros should be used after a pci_map_sg call has been done | |
15 | * to get bus addresses of each of the SG entries and their lengths. | |
16 | * You should only work with the number of sg entries pci_map_sg | |
17 | * returns, or alternatively stop on the first sg_dma_len(sg) which | |
18 | * is 0. | |
19 | */ | |
20 | #define sg_address(sg) (page_address((sg)->page) + (sg)->offset) | |
21 | #define sg_dma_address(sg) ((sg)->dma_address) | |
22 | #define sg_dma_len(sg) ((sg)->length) | |
23 | ||
24 | #define ISA_DMA_THRESHOLD (0xffffffff) | |
25 | ||
26 | #endif /* !(_BLACKFIN_SCATTERLIST_H) */ |