videobuf-dma-sg.c File Reference

#include <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/vmalloc.h>
#include <linux/pagemap.h>
#include <linux/scatterlist.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <media/videobuf-dma-sg.h>

Go to the source code of this file.

Macros
#define	MAGIC_DMABUF   0x19721112
#define	MAGIC_SG_MEM   0x17890714
#define	MAGIC_CHECK(is, should)
#define	dprintk(level, fmt, arg...)

Functions
	module_param (debug, int, 0644)
	MODULE_DESCRIPTION ("helper module to manage video4linux dma sg buffers")
	MODULE_AUTHOR ("Mauro Carvalho Chehab <[email protected]>")
	MODULE_LICENSE ("GPL")
struct videobuf_dmabuf *	videobuf_to_dma (struct videobuf_buffer *buf)
	EXPORT_SYMBOL_GPL (videobuf_to_dma)
void	videobuf_dma_init (struct videobuf_dmabuf *dma)
	EXPORT_SYMBOL_GPL (videobuf_dma_init)
int	videobuf_dma_init_user (struct videobuf_dmabuf *dma, int direction, unsigned long data, unsigned long size)
	EXPORT_SYMBOL_GPL (videobuf_dma_init_user)
int	videobuf_dma_init_kernel (struct videobuf_dmabuf *dma, int direction, int nr_pages)
	EXPORT_SYMBOL_GPL (videobuf_dma_init_kernel)
int	videobuf_dma_init_overlay (struct videobuf_dmabuf *dma, int direction, dma_addr_t addr, int nr_pages)
	EXPORT_SYMBOL_GPL (videobuf_dma_init_overlay)
int	videobuf_dma_map (struct device *dev, struct videobuf_dmabuf *dma)
	EXPORT_SYMBOL_GPL (videobuf_dma_map)
int	videobuf_dma_unmap (struct device *dev, struct videobuf_dmabuf *dma)
	EXPORT_SYMBOL_GPL (videobuf_dma_unmap)
int	videobuf_dma_free (struct videobuf_dmabuf *dma)
	EXPORT_SYMBOL_GPL (videobuf_dma_free)
void *	videobuf_sg_alloc (size_t size)
	EXPORT_SYMBOL_GPL (videobuf_sg_alloc)
void	videobuf_queue_sg_init (struct videobuf_queue *q, const struct videobuf_queue_ops *ops, struct device *dev, spinlock_t *irqlock, enum v4l2_buf_type type, enum v4l2_field field, unsigned int msize, void *priv, struct mutex *ext_lock)
	EXPORT_SYMBOL_GPL (videobuf_queue_sg_init)

Macro Definition Documentation

#define dprintk	(		level,
			fmt,
			arg...
	)

Value:

if (debug >= level)                     \
        printk(KERN_DEBUG "vbuf-sg: " fmt , ## arg)

Definition at line 54 of file videobuf-dma-sg.c.

#define MAGIC_CHECK	(		is,
			should
	)

Value:

if (unlikely((is) != (should))) {               \
        printk(KERN_ERR "magic mismatch: %x (expected %x)\n",   \
                is, should);                \
        BUG();                          \
    }

Definition at line 40 of file videobuf-dma-sg.c.

#define MAGIC_DMABUF   0x19721112

Definition at line 37 of file videobuf-dma-sg.c.

#define MAGIC_SG_MEM   0x17890714

Definition at line 38 of file videobuf-dma-sg.c.

Function Documentation

EXPORT_SYMBOL_GPL

(

videobuf_to_dma

)

EXPORT_SYMBOL_GPL

(

videobuf_dma_init

)

EXPORT_SYMBOL_GPL

(

videobuf_dma_init_user

)

EXPORT_SYMBOL_GPL

(

videobuf_dma_init_kernel

)

EXPORT_SYMBOL_GPL

(

videobuf_dma_init_overlay

)

EXPORT_SYMBOL_GPL

(

videobuf_dma_map

)

EXPORT_SYMBOL_GPL

(

videobuf_dma_unmap

)

EXPORT_SYMBOL_GPL

(

videobuf_dma_free

)

EXPORT_SYMBOL_GPL

(

videobuf_sg_alloc

)

EXPORT_SYMBOL_GPL

(

videobuf_queue_sg_init

)

MODULE_AUTHOR

(

"Mauro Carvalho Chehab <[email protected]>"

)

MODULE_DESCRIPTION

(

"helper module to manage video4linux dma sg buffers"

)

MODULE_LICENSE

(

"GPL"

)

module_param	(	debug	,
		int	,
		0644
	)

int videobuf_dma_free

(

struct videobuf_dmabuf *

dma

)

Definition at line 312 of file videobuf-dma-sg.c.

void videobuf_dma_init

(

struct videobuf_dmabuf *

dma

)

Definition at line 148 of file videobuf-dma-sg.c.

int videobuf_dma_init_kernel	(	struct videobuf_dmabuf *	dma,
		int	direction,
		int	nr_pages
	)

Definition at line 211 of file videobuf-dma-sg.c.

int videobuf_dma_init_overlay	(	struct videobuf_dmabuf *	dma,
		int	direction,
		dma_addr_t	addr,
		int	nr_pages
	)

Definition at line 234 of file videobuf-dma-sg.c.

int videobuf_dma_init_user	(	struct videobuf_dmabuf *	dma,
		int	direction,
		unsigned long	data,
		unsigned long	size
	)

Definition at line 198 of file videobuf-dma-sg.c.

int videobuf_dma_map	(	struct device *	dev,
		struct videobuf_dmabuf *	dma
	)

Definition at line 251 of file videobuf-dma-sg.c.

int videobuf_dma_unmap	(	struct device *	dev,
		struct videobuf_dmabuf *	dma
	)

Definition at line 295 of file videobuf-dma-sg.c.

void videobuf_queue_sg_init	(	struct videobuf_queue *	q,
		const struct videobuf_queue_ops *	ops,
		struct device *	dev,
		spinlock_t *	irqlock,
		enum v4l2_buf_type	type,
		enum v4l2_field	field,
		unsigned int	msize,
		void *	priv,
		struct mutex *	ext_lock
	)

Definition at line 619 of file videobuf-dma-sg.c.

void* videobuf_sg_alloc

(

size_t

size

)

Definition at line 606 of file videobuf-dma-sg.c.

struct videobuf_dmabuf* videobuf_to_dma ( struct videobuf_buffer *  buf )

read

Definition at line 137 of file videobuf-dma-sg.c.