| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __ASM_SH_SCATTERLIST_H |
| 2 | #define __ASM_SH_SCATTERLIST_H |
| 3 | |
| 4 | struct scatterlist { |
| 5 | struct page * page; /* Location for highmem page, if any */ |
| 6 | unsigned int offset;/* for highmem, page offset */ |
| 7 | dma_addr_t dma_address; |
| 8 | unsigned int length; |
| 9 | }; |
| 10 | |
| 11 | #define ISA_DMA_THRESHOLD (0x1fffffff) |
| 12 | |
| Paul Mundt | 634bf4f | 2006-09-27 14:48:09 +0900 | [diff] [blame] | 13 | /* These macros should be used after a pci_map_sg call has been done |
| 14 | * to get bus addresses of each of the SG entries and their lengths. |
| 15 | * You should only work with the number of sg entries pci_map_sg |
| 16 | * returns, or alternatively stop on the first sg_dma_len(sg) which |
| 17 | * is 0. |
| 18 | */ |
| 19 | #define sg_dma_address(sg) ((sg)->dma_address) |
| 20 | #define sg_dma_len(sg) ((sg)->length) |
| 21 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #endif /* !(__ASM_SH_SCATTERLIST_H) */ |