| Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 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) */ |