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- #ifndef __ASM_GENERIC_SCATTERLIST_H
- #define __ASM_GENERIC_SCATTERLIST_H
- #include <linux/types.h>
- struct scatterlist {
- #ifdef CONFIG_DEBUG_SG
- unsigned long sg_magic;
- #endif
- unsigned long page_link;
- unsigned int offset;
- unsigned int length;
- dma_addr_t dma_address;
- #ifdef CONFIG_NEED_SG_DMA_LENGTH
- unsigned int dma_length;
- #endif
- };
- /*
- * These macros should be used after a dma_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
- * is 0.
- */
- #define sg_dma_address(sg) ((sg)->dma_address)
- #ifdef CONFIG_NEED_SG_DMA_LENGTH
- #define sg_dma_len(sg) ((sg)->dma_length)
- #else
- #define sg_dma_len(sg) ((sg)->length)
- #endif
- #endif /* __ASM_GENERIC_SCATTERLIST_H */
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