[deliverable/linux.git] / include / asm-blackfin / scatterlist.h

#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) */
Commit	Line	Data
1394f032 BW	1	#ifndef _BLACKFIN_SCATTERLIST_H
	2	#define _BLACKFIN_SCATTERLIST_H
	3
	4	#include <linux/mm.h>
	5
	6	struct scatterlist {
	7	struct page *page;
	8	unsigned int offset;
	9	dma_addr_t dma_address;
	10	unsigned int length;
	11	};
	12
	13	/*
	14	* These macros should be used after a pci_map_sg call has been done
	15	* to get bus addresses of each of the SG entries and their lengths.
	16	* You should only work with the number of sg entries pci_map_sg
	17	* returns, or alternatively stop on the first sg_dma_len(sg) which
	18	* is 0.
	19	*/
	20	#define sg_address(sg) (page_address((sg)->page) + (sg)->offset)
	21	#define sg_dma_address(sg) ((sg)->dma_address)
	22	#define sg_dma_len(sg) ((sg)->length)
	23
	24	#define ISA_DMA_THRESHOLD (0xffffffff)
	25
	26	#endif /* !(_BLACKFIN_SCATTERLIST_H) */