linux/arch/cris/include/asm/scatterlist.h

#ifndef __ASM_CRIS_SCATTERLIST_H
#define __ASM_CRIS_SCATTERLIST_H

struct scatterlist {
#ifdef CONFIG_DEBUG_SG
	unsigned long sg_magic;
#endif
	char *  address;    /* Location data is to be transferred to */
	unsigned int length;

	/* The following is i386 highmem junk - not used by us */
	unsigned long page_link;
	unsigned int offset;/* for highmem, page offset */

};

#define sg_dma_address(sg)	((sg)->address)
#define sg_dma_len(sg)		((sg)->length)
/* i386 junk */

#define ISA_DMA_THRESHOLD (0x1fffffff)

#endif /* !(__ASM_CRIS_SCATTERLIST_H) */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 22:20:36 +00:00			`#ifndef __ASM_CRIS_SCATTERLIST_H`
			`#define __ASM_CRIS_SCATTERLIST_H`

			`struct scatterlist {`
Add CONFIG_DEBUG_SG sg validation Add a Kconfig entry which will toggle some sanity checks on the sg entry and tables. Signed-off-by: Jens Axboe <jens.axboe@oracle.com> 2007-10-22 18:01:06 +00:00			`#ifdef CONFIG_DEBUG_SG`
			`unsigned long sg_magic;`
			`#endif`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 22:20:36 +00:00			`char * address; /* Location data is to be transferred to */`
			`unsigned int length;`

			`/* The following is i386 highmem junk - not used by us */`
Change table chaining layout Change the page member of the scatterlist structure to be an unsigned long, and encode more stuff in the lower bits: - Bits 0 and 1 zero: this is a normal sg entry. Next sg entry is located at sg + 1. - Bit 0 set: this is a chain entry, the next real entry is at ->page_link with the two low bits masked off. - Bit 1 set: this is the final entry in the sg entry. sg_next() will return NULL when passed such an entry. It's thus important that sg table users use the proper accessors to get and set the page member. Signed-off-by: Jens Axboe <jens.axboe@oracle.com> 2007-10-22 17:57:20 +00:00			`unsigned long page_link;`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 22:20:36 +00:00			`unsigned int offset;/* for highmem, page offset */`

			`};`

			`#define sg_dma_address(sg) ((sg)->address)`
			`#define sg_dma_len(sg) ((sg)->length)`
			`/* i386 junk */`

			`#define ISA_DMA_THRESHOLD (0x1fffffff)`

			`#endif /* !(__ASM_CRIS_SCATTERLIST_H) */`