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#ifndef _BLACKFIN_SCATTERLIST_H
#define _BLACKFIN_SCATTERLIST_H
#include <linux/mm.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_address(sg) (page_address((sg)->page) + (sg)->offset)
#define sg_dma_address(sg) ((sg)->dma_address)
#define sg_dma_len(sg) ((sg)->length)
#define ISA_DMA_THRESHOLD (0xffffffff)
#endif /* !(_BLACKFIN_SCATTERLIST_H) */
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