| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _ASMARM_SCATTERLIST_H |
| 2 | #define _ASMARM_SCATTERLIST_H |
| 3 | |
| 4 | #include <asm/memory.h> |
| 5 | #include <asm/types.h> |
| 6 | |
| 7 | struct scatterlist { |
| Jens Axboe | d6ec084 | 2007-10-22 20:01:06 +0200 | [diff] [blame] | 8 | #ifdef CONFIG_DEBUG_SG |
| 9 | unsigned long sg_magic; |
| 10 | #endif |
| Jens Axboe | 18dabf4 | 2007-10-22 19:57:20 +0200 | [diff] [blame] | 11 | unsigned long page_link; |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | unsigned int offset; /* buffer offset */ |
| 13 | dma_addr_t dma_address; /* dma address */ |
| 14 | unsigned int length; /* length */ |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | }; |
| 16 | |
| 17 | /* |
| 18 | * These macros should be used after a pci_map_sg call has been done |
| 19 | * to get bus addresses of each of the SG entries and their lengths. |
| 20 | * You should only work with the number of sg entries pci_map_sg |
| 21 | * returns, or alternatively stop on the first sg_dma_len(sg) which |
| 22 | * is 0. |
| 23 | */ |
| 24 | #define sg_dma_address(sg) ((sg)->dma_address) |
| 25 | #define sg_dma_len(sg) ((sg)->length) |
| 26 | |
| 27 | #endif /* _ASMARM_SCATTERLIST_H */ |