projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| aafe4dbe AB |
1 | #ifndef __ASM_GENERIC_SCATTERLIST_H |
| 2 | #define __ASM_GENERIC_SCATTERLIST_H | |
| 3 | ||
| 4 | #include <linux/types.h> | |
| 5 | ||
| 6 | struct scatterlist { | |
| 7 | #ifdef CONFIG_DEBUG_SG | |
| 8 | unsigned long sg_magic; | |
| 9 | #endif | |
| 10 | unsigned long page_link; | |
| 11 | unsigned int offset; | |
| 12 | unsigned int length; | |
| 13 | dma_addr_t dma_address; | |
| 18e98307 | 14 | #ifdef CONFIG_NEED_SG_DMA_LENGTH |
| aafe4dbe | 15 | unsigned int dma_length; |
| 18e98307 | 16 | #endif |
| aafe4dbe AB |
17 | }; |
| 18 | ||
| 19 | /* | |
| 20 | * These macros should be used after a dma_map_sg call has been done | |
| 21 | * to get bus addresses of each of the SG entries and their lengths. | |
| 22 | * You should only work with the number of sg entries pci_map_sg | |
| 23 | * returns, or alternatively stop on the first sg_dma_len(sg) which | |
| 24 | * is 0. | |
| 25 | */ | |
| 26 | #define sg_dma_address(sg) ((sg)->dma_address) | |
| 18e98307 FT |
27 | |
| 28 | #ifdef CONFIG_NEED_SG_DMA_LENGTH | |
| aafe4dbe AB |
29 | #define sg_dma_len(sg) ((sg)->dma_length) |
| 30 | #else | |
| 31 | #define sg_dma_len(sg) ((sg)->length) | |
| 18e98307 | 32 | #endif |
| aafe4dbe | 33 | |
| aafe4dbe | 34 | #endif /* __ASM_GENERIC_SCATTERLIST_H */ |