| #ifndef _ASM_SCATTERLIST_H |
| #define _ASM_SCATTERLIST_H |
| * Drivers must set either ->address or (preferred) page and ->offset |
| * to indicate where data must be transferred to/from. |
| * Using page is recommended since it handles highmem data as well as |
| * low mem. ->address is restricted to data which has a virtual mapping, and |
| * it will go away in the future. Updating to page can be automated very |
| * easily -- something like |
| * sg->address = some_ptr; |
| * sg_set_buf(sg, some_ptr, length); |
| * and that's it. There's no excuse for not highmem enabling YOUR driver. /jens |
| unsigned int offset; /* for highmem, page offset */ |
| * These macros should be used after a pci_map_sg call has been done |
| * to get bus addresses of each of the SG entries and their lengths. |
| * You should only work with the number of sg entries pci_map_sg |
| * returns, or alternatively stop on the first sg_dma_len(sg) which |
| #define sg_dma_address(sg) ((sg)->dma_address) |
| #define sg_dma_len(sg) ((sg)->length) |
| #define ISA_DMA_THRESHOLD (0xffffffffUL) |
| #endif /* !_ASM_SCATTERLIST_H */ |