1/*
 2 * helper functions for vmalloc capture buffers
 3 *
 4 * The functions expect the hardware being able to scatter gather
 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 */
15#ifndef _VIDEOBUF_VMALLOC_H
16#define _VIDEOBUF_VMALLOC_H
17
18#include <media/videobuf-core.h>
19
20/* --------------------------------------------------------------------- */
21
22struct videobuf_vmalloc_memory {
23	u32                 magic;
24
25	void                *vaddr;
26
27	/* remap_vmalloc_range seems to need to run
28	 * after mmap() on some cases */
29	struct vm_area_struct *vma;
30};
31
32void videobuf_queue_vmalloc_init(struct videobuf_queue *q,
33			 const struct videobuf_queue_ops *ops,
34			 struct device *dev,
35			 spinlock_t *irqlock,
36			 enum v4l2_buf_type type,
37			 enum v4l2_field field,
38			 unsigned int msize,
39			 void *priv,
40			 struct mutex *ext_lock);
41
42void *videobuf_to_vmalloc(struct videobuf_buffer *buf);
43
44void videobuf_vmalloc_free(struct videobuf_buffer *buf);
45
46#endif