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

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * helper functions for vmalloc capture buffers
 4 *
 5 * The functions expect the hardware being able to scatter gather
 6 * (i.e. the buffers are not linear in physical memory, but fragmented
 7 * into PAGE_SIZE chunks).  They also assume the driver does not need
 8 * to touch the video data.
 9 *
10 * (c) 2007 Mauro Carvalho Chehab, <mchehab@kernel.org>
 
 
 
 
11 */
12#ifndef _VIDEOBUF_VMALLOC_H
13#define _VIDEOBUF_VMALLOC_H
14
15#include <media/videobuf-core.h>
16
17/* --------------------------------------------------------------------- */
18
19struct videobuf_vmalloc_memory {
20	u32                 magic;
21
22	void                *vaddr;
23
24	/* remap_vmalloc_range seems to need to run
25	 * after mmap() on some cases */
26	struct vm_area_struct *vma;
27};
28
29void videobuf_queue_vmalloc_init(struct videobuf_queue *q,
30			 const struct videobuf_queue_ops *ops,
31			 struct device *dev,
32			 spinlock_t *irqlock,
33			 enum v4l2_buf_type type,
34			 enum v4l2_field field,
35			 unsigned int msize,
36			 void *priv,
37			 struct mutex *ext_lock);
38
39void *videobuf_to_vmalloc(struct videobuf_buffer *buf);
40
41void videobuf_vmalloc_free(struct videobuf_buffer *buf);
42
43#endif