| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __ASM_SCATTERLIST_H |
| 2 | #define __ASM_SCATTERLIST_H |
| 3 | |
| Jean Delvare | a9dfd28 | 2007-03-06 02:45:12 -0800 | [diff] [blame^] | 4 | #include <asm/types.h> |
| 5 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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_dma_address(sg) ((sg)->dma_address) |
| 21 | #define sg_dma_len(sg) ((sg)->length) |
| 22 | |
| 23 | #define ISA_DMA_THRESHOLD (0x00ffffffUL) |
| 24 | |
| 25 | #endif /* __ASM_SCATTERLIST_H */ |