[mirror_ubuntu-zesty-kernel.git] / include / asm-ia64 / scatterlist.h

#ifndef _ASM_IA64_SCATTERLIST_H
#define _ASM_IA64_SCATTERLIST_H

/*
 * Modified 1998-1999, 2001-2002, 2004
 *	David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co
 */

struct scatterlist {
	struct page *page;
	unsigned int offset;
	unsigned int length;	/* buffer length */

	dma_addr_t dma_address;
	unsigned int dma_length;
};

/*
 * It used to be that ISA_DMA_THRESHOLD had something to do with the
 * DMA-limits of ISA-devices.  Nowadays, its only remaining use (apart
 * from the aha1542.c driver, which isn't 64-bit clean anyhow) is to
 * tell the block-layer (via BLK_BOUNCE_ISA) what the max. physical
 * address of a page is that is allocated with GFP_DMA.  On IA-64,
 * that's 4GB - 1.
 */
#define ISA_DMA_THRESHOLD	0xffffffff

#endif /* _ASM_IA64_SCATTERLIST_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _ASM_IA64_SCATTERLIST_H
	2	#define _ASM_IA64_SCATTERLIST_H
	3
	4	/*
	5	* Modified 1998-1999, 2001-2002, 2004
	6	* David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co
	7	*/
	8
	9	struct scatterlist {
	10	struct page *page;
	11	unsigned int offset;
	12	unsigned int length; /* buffer length */
	13
	14	dma_addr_t dma_address;
	15	unsigned int dma_length;
	16	};
	17
	18	/*
	19	* It used to be that ISA_DMA_THRESHOLD had something to do with the
	20	* DMA-limits of ISA-devices. Nowadays, its only remaining use (apart
	21	* from the aha1542.c driver, which isn't 64-bit clean anyhow) is to
	22	* tell the block-layer (via BLK_BOUNCE_ISA) what the max. physical
	23	* address of a page is that is allocated with GFP_DMA. On IA-64,
	24	* that's 4GB - 1.
	25	*/
	26	#define ISA_DMA_THRESHOLD 0xffffffff
	27
	28	#endif /* _ASM_IA64_SCATTERLIST_H */