2 * helper functions for vmalloc capture buffers
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.
9 * (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org>
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
16 #include <media/videobuf-core.h>
18 /* --------------------------------------------------------------------- */
20 struct videbuf_vmalloc_memory
24 /* for mmap'ed buffers */
25 struct videobuf_mapping *map;
29 /* remap_vmalloc_range seems to need to run after mmap() on some cases */
30 struct vm_area_struct *vma;
33 void videobuf_queue_vmalloc_init(struct videobuf_queue* q,
34 struct videobuf_queue_ops *ops,
37 enum v4l2_buf_type type,
38 enum v4l2_field field,
42 void *videobuf_to_vmalloc (struct videobuf_buffer *buf);
44 void videobuf_vmalloc_free (struct videobuf_buffer *buf);