1 /*
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  */
15 
16 #include <media/videobuf-core.h>
17 
18 /* --------------------------------------------------------------------- */
19 
20 struct videbuf_vmalloc_memory
21 {
22 	u32                 magic;
23 
24 	void                *vmalloc;
25 
26 	/* remap_vmalloc_range seems to need to run after mmap() on some cases */
27 	struct vm_area_struct *vma;
28 };
29 
30 void videobuf_queue_vmalloc_init(struct videobuf_queue* q,
31 			 struct videobuf_queue_ops *ops,
32 			 void *dev,
33 			 spinlock_t *irqlock,
34 			 enum v4l2_buf_type type,
35 			 enum v4l2_field field,
36 			 unsigned int msize,
37 			 void *priv);
38 
39 void *videobuf_to_vmalloc (struct videobuf_buffer *buf);
40 
41 void videobuf_vmalloc_free (struct videobuf_buffer *buf);
42