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77512baa | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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2 | /* |
3 | * helper functions for vmalloc capture buffers | |
4 | * | |
5d6aaf50 | 5 | * The functions expect the hardware being able to scatter gather |
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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 | * | |
32590819 | 10 | * (c) 2007 Mauro Carvalho Chehab, <mchehab@kernel.org> |
87b9ad07 | 11 | */ |
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12 | #ifndef _VIDEOBUF_VMALLOC_H |
13 | #define _VIDEOBUF_VMALLOC_H | |
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14 | |
15 | #include <media/videobuf-core.h> | |
16 | ||
17 | /* --------------------------------------------------------------------- */ | |
18 | ||
7a02264c | 19 | struct videobuf_vmalloc_memory { |
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20 | u32 magic; |
21 | ||
bb6dbe74 | 22 | void *vaddr; |
87b9ad07 | 23 | |
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24 | /* remap_vmalloc_range seems to need to run |
25 | * after mmap() on some cases */ | |
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26 | struct vm_area_struct *vma; |
27 | }; | |
28 | ||
7a02264c | 29 | void videobuf_queue_vmalloc_init(struct videobuf_queue *q, |
38a54f35 | 30 | const struct videobuf_queue_ops *ops, |
f8b0bca1 | 31 | struct device *dev, |
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32 | spinlock_t *irqlock, |
33 | enum v4l2_buf_type type, | |
34 | enum v4l2_field field, | |
35 | unsigned int msize, | |
08bff03e HV |
36 | void *priv, |
37 | struct mutex *ext_lock); | |
87b9ad07 | 38 | |
7a02264c | 39 | void *videobuf_to_vmalloc(struct videobuf_buffer *buf); |
87b9ad07 | 40 | |
7a02264c | 41 | void videobuf_vmalloc_free(struct videobuf_buffer *buf); |
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42 | |
43 | #endif |