Merge tag 'nios2-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan...
[sfrench/cifs-2.6.git] / include / media / videobuf2-memops.h
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