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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 3243 | Serge | 1 | #ifndef __ASM_GENERIC_SCATTERLIST_H |
| 2 | #define __ASM_GENERIC_SCATTERLIST_H |
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| 3 | |||
| 4 | #include |
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| 5 | |||
| 6 | struct scatterlist { |
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| 7 | #ifdef CONFIG_DEBUG_SG |
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| 8 | unsigned long sg_magic; |
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| 9 | #endif |
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| 10 | unsigned long page_link; |
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| 11 | unsigned int offset; |
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| 12 | unsigned int length; |
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| 13 | dma_addr_t dma_address; |
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| 14 | #ifdef CONFIG_NEED_SG_DMA_LENGTH |
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| 15 | unsigned int dma_length; |
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| 16 | #endif |
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| 17 | }; |
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| 18 | |||
| 19 | /* |
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| 20 | * These macros should be used after a dma_map_sg call has been done |
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| 21 | * to get bus addresses of each of the SG entries and their lengths. |
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| 22 | * You should only work with the number of sg entries pci_map_sg |
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| 23 | * returns, or alternatively stop on the first sg_dma_len(sg) which |
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| 24 | * is 0. |
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| 25 | */ |
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| 26 | #define sg_dma_address(sg) ((sg)->dma_address) |
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| 27 | |||
| 28 | #ifdef CONFIG_NEED_SG_DMA_LENGTH |
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| 29 | #define sg_dma_len(sg) ((sg)->dma_length) |
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| 30 | #else |
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| 31 | #define sg_dma_len(sg) ((sg)->length) |
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| 32 | #endif |
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| 33 | |||
| 3297 | Serge | 34 | #define ARCH_HAS_SG_CHAIN |
| 35 | |||
| 3243 | Serge | 36 | #endif /* __ASM_GENERIC_SCATTERLIST_H */ |