linux-pinenote/arch/mips/include/asm/scatterlist.h

#ifndef __ASM_SCATTERLIST_H
#define __ASM_SCATTERLIST_H

#include <asm/types.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 (0x00ffffffUL)

#endif /* __ASM_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 15:20:36 -07:00			`#ifndef __ASM_SCATTERLIST_H`
			`#define __ASM_SCATTERLIST_H`

PCI: scatterlist.h needs types.h Most architectures' scatterlist.h use the type dma_addr_t, but omit to include <asm/types.h> which defines it. This could lead to build failures, so let's add the missing includes. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2007-03-06 02:45:12 -08:00			`#include <asm/types.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 15:20:36 -07:00			`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 20:01:06 +02:00			`#ifdef CONFIG_DEBUG_SG`
			`unsigned long sg_magic;`
			`#endif`
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 19:57:20 +02:00			`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 15:20:36 -07:00			`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 (0x00ffffffUL)`

			`#endif /* __ASM_SCATTERLIST_H */`