1/*
2 * videobuf2-memops.h - generic memory handling routines for videobuf2
3 *
4 * Copyright (C) 2010 Samsung Electronics
5 *
6 * Author: Pawel Osciak <pawel@osciak.com>
7 * Marek Szyprowski <m.szyprowski@samsung.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation.
12 */
13
14#ifndef _MEDIA_VIDEOBUF2_MEMOPS_H
15#define _MEDIA_VIDEOBUF2_MEMOPS_H
16
17#include <media/videobuf2-v4l2.h>
18#include <linux/mm.h>
19#include <linux/refcount.h>
20
21/**
22 * struct vb2_vmarea_handler - common vma refcount tracking handler.
23 *
24 * @refcount: pointer to &refcount_t entry in the buffer.
25 * @put: callback to function that decreases buffer refcount.
26 * @arg: argument for @put callback.
27 */
28struct vb2_vmarea_handler {
29 refcount_t *refcount;
30 void (*put)(void *arg);
31 void *arg;
32};
33
34extern const struct vm_operations_struct vb2_common_vm_ops;
35
36struct frame_vector *vb2_create_framevec(unsigned long start,
37 unsigned long length,
38 bool write);
39void vb2_destroy_framevec(struct frame_vector *vec);
40
41#endif
42

source code of linux/include/media/videobuf2-memops.h