[mirror_ubuntu-artful-kernel.git] / include / asm-x86 / scatterlist.h

#ifndef _ASM_X86_SCATTERLIST_H
#define _ASM_X86_SCATTERLIST_H

#include <asm/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;
	unsigned int	dma_length;
};

#define ARCH_HAS_SG_CHAIN
#define ISA_DMA_THRESHOLD (0x00ffffff)

/*
 * 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.
 */
#define sg_dma_address(sg)	((sg)->dma_address)
#ifdef CONFIG_X86_32
# define sg_dma_len(sg)		((sg)->length)
#else
# define sg_dma_len(sg)		((sg)->dma_length)
#endif

#endif
Commit	Line	Data
3ebc51d7 TG	1	#ifndef _ASM_X86_SCATTERLIST_H
	2	#define _ASM_X86_SCATTERLIST_H
	3
	4	#include <asm/types.h>
	5
	6	struct scatterlist {
	7	#ifdef CONFIG_DEBUG_SG
	8	unsigned long sg_magic;
	9	#endif
	10	unsigned long page_link;
	11	unsigned int offset;
	12	unsigned int length;
	13	dma_addr_t dma_address;
3ebc51d7	14	unsigned int dma_length;
3ebc51d7 TG	15	};
	16
	17	#define ARCH_HAS_SG_CHAIN
	18	#define ISA_DMA_THRESHOLD (0x00ffffff)
	19
	20	/*
	21	* These macros should be used after a pci_map_sg call has been done
	22	* to get bus addresses of each of the SG entries and their lengths.
	23	* You should only work with the number of sg entries pci_map_sg
	24	* returns.
	25	*/
	26	#define sg_dma_address(sg) ((sg)->dma_address)
96a388de	27	#ifdef CONFIG_X86_32
3ebc51d7	28	# define sg_dma_len(sg) ((sg)->length)
96a388de	29	#else
3ebc51d7 TG	30	# define sg_dma_len(sg) ((sg)->dma_length)
	31	#endif
	32
96a388de	33	#endif