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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 | |
22 | struct 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 | |
32 | void 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 | |
42 | void *videobuf_to_vmalloc(struct videobuf_buffer *buf); |
43 | |
44 | void videobuf_vmalloc_free(struct videobuf_buffer *buf); |
45 | |
46 | #endif |
47 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9