1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * helper functions for vmalloc capture buffers
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.
10 * (c) 2007 Mauro Carvalho Chehab, <mchehab@kernel.org>
12 #ifndef _VIDEOBUF_VMALLOC_H
13 #define _VIDEOBUF_VMALLOC_H
15 #include <media/videobuf-core.h>
17 /* --------------------------------------------------------------------- */
19 struct videobuf_vmalloc_memory {
24 /* remap_vmalloc_range seems to need to run
25 * after mmap() on some cases */
26 struct vm_area_struct *vma;
29 void videobuf_queue_vmalloc_init(struct videobuf_queue *q,
30 const struct videobuf_queue_ops *ops,
33 enum v4l2_buf_type type,
34 enum v4l2_field field,
37 struct mutex *ext_lock);
39 void *videobuf_to_vmalloc(struct videobuf_buffer *buf);
41 void videobuf_vmalloc_free(struct videobuf_buffer *buf);