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Mauro Carvalho Chehab87b9ad02007-08-02 23:31:33 -03001/*
2 * helper functions for vmalloc capture buffers
3 *
Magnus Damm5d6aaf52008-07-16 21:27:49 -03004 * The functions expect the hardware being able to scatter gather
Mauro Carvalho Chehab87b9ad02007-08-02 23:31:33 -03005 * (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
Pawel Osciak7a022642010-03-17 04:01:04 -030022struct videobuf_vmalloc_memory {
Mauro Carvalho Chehab87b9ad02007-08-02 23:31:33 -030023 u32 magic;
24
Mauro Carvalho Chehab87b9ad02007-08-02 23:31:33 -030025 void *vmalloc;
26
Pawel Osciak7a022642010-03-17 04:01:04 -030027 /* remap_vmalloc_range seems to need to run
28 * after mmap() on some cases */
Mauro Carvalho Chehab87b9ad02007-08-02 23:31:33 -030029 struct vm_area_struct *vma;
30};
31
Pawel Osciak7a022642010-03-17 04:01:04 -030032void videobuf_queue_vmalloc_init(struct videobuf_queue *q,
Jonathan Corbet38a54f32009-11-17 19:43:41 -030033 const struct videobuf_queue_ops *ops,
Jonathan Corbetf8b0bca2009-11-23 14:29:35 -030034 struct device *dev,
Mauro Carvalho Chehab87b9ad02007-08-02 23:31:33 -030035 spinlock_t *irqlock,
36 enum v4l2_buf_type type,
37 enum v4l2_field field,
38 unsigned int msize,
39 void *priv);
40
Pawel Osciak7a022642010-03-17 04:01:04 -030041void *videobuf_to_vmalloc(struct videobuf_buffer *buf);
Mauro Carvalho Chehab87b9ad02007-08-02 23:31:33 -030042
Pawel Osciak7a022642010-03-17 04:01:04 -030043void videobuf_vmalloc_free(struct videobuf_buffer *buf);
Mauro Carvalho Chehab59d34482008-04-13 15:10:00 -030044
45#endif