blob: aed39460c154cf73a8d8ecb55fe5edd51dec35b9 [file] [log] [blame]
Mauro Carvalho Chehab87b9ad02007-08-02 23:31:33 -03001/*
2 * helper functions for vmalloc capture buffers
3 *
4 * The functions expect the hardware being able to scatter gatter
5 * (i.e. the buffers are not linear in physical memory, but fragmented
6 * into PAGE_SIZE chunks). They also assume the driver does not need
7 * to touch the video data.
8 *
9 * (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2
14 */
Mauro Carvalho Chehab59d34482008-04-13 15:10:00 -030015#ifndef _VIDEOBUF_VMALLOC_H
16#define _VIDEOBUF_VMALLOC_H
Mauro Carvalho Chehab87b9ad02007-08-02 23:31:33 -030017
18#include <media/videobuf-core.h>
19
20/* --------------------------------------------------------------------- */
21
Brandon Philips384b8352008-02-04 20:52:21 -030022struct videobuf_vmalloc_memory
Mauro Carvalho Chehab87b9ad02007-08-02 23:31:33 -030023{
24 u32 magic;
25
Mauro Carvalho Chehab87b9ad02007-08-02 23:31:33 -030026 void *vmalloc;
27
28 /* remap_vmalloc_range seems to need to run after mmap() on some cases */
29 struct vm_area_struct *vma;
30};
31
32void videobuf_queue_vmalloc_init(struct videobuf_queue* q,
33 struct videobuf_queue_ops *ops,
34 void *dev,
35 spinlock_t *irqlock,
36 enum v4l2_buf_type type,
37 enum v4l2_field field,
38 unsigned int msize,
39 void *priv);
40
41void *videobuf_to_vmalloc (struct videobuf_buffer *buf);
42
43void videobuf_vmalloc_free (struct videobuf_buffer *buf);
Mauro Carvalho Chehab59d34482008-04-13 15:10:00 -030044
45#endif