git://bbs.cooldavid.org / net-next-2.6.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; | |
| 14 | unsigned int dma_length; | |
| 15 | }; | |
| 16 | ||
| 17 | /* | |
| 18 | * These macros should be used after a dma_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 | #ifndef sg_dma_len | |
| 26 | /* | |
| 27 | * Normally, you have an iommu on 64 bit machines, but not on 32 bit | |
| 28 | * machines. Architectures that are differnt should override this. | |
| 29 | */ | |
| 30 | #if __BITS_PER_LONG == 64 | |
| 31 | #define sg_dma_len(sg) ((sg)->dma_length) | |
| 32 | #else | |
| 33 | #define sg_dma_len(sg) ((sg)->length) | |
| 34 | #endif /* 64 bit */ | |
| 35 | #endif /* sg_dma_len */ | |
| 36 | ||
| 37 | #ifndef ISA_DMA_THRESHOLD | |
| 38 | #define ISA_DMA_THRESHOLD (~0UL) | |
| 39 | #endif | |
| 40 | ||
| 41 | #define ARCH_HAS_SG_CHAIN | |
| 42 | ||
| 43 | #endif /* __ASM_GENERIC_SCATTERLIST_H */ |