scatterlist.h File Reference

#include <linux/kernel.h>

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Classes
struct	scatterlist
struct	sg_table
struct	sg_page_iter
struct	sg_dma_page_iter

Macros
#define	for_each_sg_page(sglist, pgi, nents, pgoff)
#define	for_each_sgtable_page(sgt, pgi, pgoff)    for_each_sg_page((sgt)->sgl, pgi, (sgt)->orig_nents, pgoff)
#define	sg_dma_address(sg)   ((sg)->dma_address)
#define	sg_dma_len(sg)   ((sg)->dma_length)
#define	for_each_sg_dma(sglist, sg, nents, i)    for ((i) = 0; (i) < (nents) && ((sg) = &(sglist)[(i)]); (i)++)
#define	for_each_sgtable_dma_sg(sgt, sg, i)    for_each_sg_dma((sgt)->sgl, sg, (sgt)->nents, i)
#define	for_each_sg(sglist, sg, nents, i)    for ((i) = 0; (i) < (nents) && ((sg) = &(sglist)[(i)]); (i)++)
#define	for_each_sgtable_sg(sgt, sg, i)    for_each_sg((sgt)->sgl, sg, (sgt)->orig_nents, i)
#define	for_each_sgtable_dma_page(sgt, pgi, pgoff)    for_each_sg_page((sgt)->sgl, &(pgi)->base, (sgt)->nents, pgoff)

Functions
void	sg_init_one (struct scatterlist *sg, const void *buf, unsigned int len)
struct page *	sg_page (const struct scatterlist *sg)
void	sg_set_page (struct scatterlist *sg, struct page *page, unsigned int len, unsigned int offset)
void	sg_init_table (struct scatterlist *sgl, unsigned int n)
int	sg_alloc_table_from_pages_segment (struct sg_table *sgt, struct page **pages, unsigned int n_pages, unsigned int offset, unsigned long size, unsigned int max_segment, gfp_t gfp_mask)
int	sg_alloc_table (struct sg_table *sgt, unsigned int nents, gfp_t gfp)
void	sg_free_table (struct sg_table *sgt)
dma_addr_t	sg_phys (const struct scatterlist *sg)

Macro Definition Documentation

for_each_sg

#define for_each_sg	(		sglist,
			sg,
			nents,
			i
	)		for ((i) = 0; (i) < (nents) && ((sg) = &(sglist)[(i)]); (i)++)

for_each_sg_dma

#define for_each_sg_dma	(		sglist,
			sg,
			nents,
			i
	)		for ((i) = 0; (i) < (nents) && ((sg) = &(sglist)[(i)]); (i)++)

for_each_sg_page

#define for_each_sg_page	(		sglist,
			pgi,
			nents,
			pgoff
	)

Value:

    for (__sg_page_iter_start(pgi, sglist, nents, pgoff);       \
         __sg_page_iter_next(pgi);)

for_each_sgtable_dma_page

#define for_each_sgtable_dma_page	(		sgt,
			pgi,
			pgoff
	)		for_each_sg_page((sgt)->sgl, &(pgi)->base, (sgt)->nents, pgoff)

for_each_sgtable_dma_sg

#define for_each_sgtable_dma_sg	(		sgt,
			sg,
			i
	)		for_each_sg_dma((sgt)->sgl, sg, (sgt)->nents, i)

for_each_sgtable_page

#define for_each_sgtable_page	(		sgt,
			pgi,
			pgoff
	)		for_each_sg_page((sgt)->sgl, pgi, (sgt)->orig_nents, pgoff)

for_each_sgtable_sg

#define for_each_sgtable_sg	(		sgt,
			sg,
			i
	)		for_each_sg((sgt)->sgl, sg, (sgt)->orig_nents, i)

sg_dma_address

#define sg_dma_address

(

sg

)

((sg)->dma_address)

sg_dma_len

#define sg_dma_len

(

sg

)

((sg)->dma_length)

Function Documentation

sg_alloc_table()

int sg_alloc_table	(	struct sg_table *	sgt,
		unsigned int	nents,
		gfp_t	gfp
	)

sg_alloc_table_from_pages_segment()

int sg_alloc_table_from_pages_segment	(	struct sg_table *	sgt,
		struct page **	pages,
		unsigned int	n_pages,
		unsigned int	offset,
		unsigned long	size,
		unsigned int	max_segment,
		gfp_t	gfp_mask
	)

sg_free_table()

void sg_free_table

(

struct sg_table *

sgt

)

sg_init_one()

void sg_init_one ( struct scatterlist *  sg, const void *  buf, unsigned int  len  )

extern

sg_init_table()

void sg_init_table ( struct scatterlist *  sgl, unsigned int  n  )

extern

sg_page()

struct page * sg_page ( const struct scatterlist *  sg )

extern

sg_phys()

dma_addr_t sg_phys

(

const struct scatterlist *

sg

)

sg_set_page()

void sg_set_page ( struct scatterlist *  sg, struct page *  page, unsigned int  len, unsigned int  offset  )

extern