Logo Search packages:      
Sourcecode: linux version File versions

scatterlist.h

#ifndef _BLACKFIN_SCATTERLIST_H
#define _BLACKFIN_SCATTERLIST_H

#include <linux/mm.h>

struct scatterlist {
#ifdef CONFIG_DEBUG_SG
      unsigned long sg_magic;
#endif
      unsigned long page_link;
      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     (0xffffffff)

#endif                        /* !(_BLACKFIN_SCATTERLIST_H) */

Generated by  Doxygen 1.6.0   Back to index