Merge branch 'kcsan.2021.05.18a' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-microblaze.git] / include / media / videobuf-vmalloc.h
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
19 struct 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
29 void 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
39 void *videobuf_to_vmalloc(struct videobuf_buffer *buf);
40
41 void videobuf_vmalloc_free(struct videobuf_buffer *buf);
42
43 #endif