File: scatterlist.h

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linux-kernel-headers 2.6.18-7
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#ifndef __ASM_SCATTERLIST_H
#define __ASM_SCATTERLIST_H

struct scatterlist {
	struct page *	page;
	unsigned int	offset;
	dma_addr_t	dma_address;
	unsigned int	length;
};

/*
 * These macros should be used after a pci_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)
#define sg_dma_len(sg)		((sg)->length)

#define ISA_DMA_THRESHOLD (0x00ffffffUL)

#endif /* __ASM_SCATTERLIST_H */