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 */
28 struct vb2_vmarea_handler {
29 refcount_t *refcount;
30 void (*put)(void *arg);
31 void *arg;
32 };
33
34 extern const struct vm_operations_struct vb2_common_vm_ops;
35
36 struct frame_vector *vb2_create_framevec(unsigned long start,
37 unsigned long length,
38 bool write);
39 void vb2_destroy_framevec(struct frame_vector *vec);
40
41 #endif
42
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