mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-27 04:54:41 +08:00
851c0c96b2
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org> http://thread.gmane.org/gmane.comp.video.video4linux/34978/focus=34981 Reviewed-by: Ricardo Cerqueira <v4l@cerqueira.org>
42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
/*
|
|
* helper functions for vmalloc capture buffers
|
|
*
|
|
* The functions expect the hardware being able to scatter gatter
|
|
* (i.e. the buffers are not linear in physical memory, but fragmented
|
|
* into PAGE_SIZE chunks). They also assume the driver does not need
|
|
* to touch the video data.
|
|
*
|
|
* (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2
|
|
*/
|
|
|
|
#include <media/videobuf-core.h>
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
struct videbuf_vmalloc_memory
|
|
{
|
|
u32 magic;
|
|
|
|
void *vmalloc;
|
|
|
|
/* remap_vmalloc_range seems to need to run after mmap() on some cases */
|
|
struct vm_area_struct *vma;
|
|
};
|
|
|
|
void videobuf_queue_vmalloc_init(struct videobuf_queue* q,
|
|
struct videobuf_queue_ops *ops,
|
|
void *dev,
|
|
spinlock_t *irqlock,
|
|
enum v4l2_buf_type type,
|
|
enum v4l2_field field,
|
|
unsigned int msize,
|
|
void *priv);
|
|
|
|
void *videobuf_to_vmalloc (struct videobuf_buffer *buf);
|
|
|
|
void videobuf_vmalloc_free (struct videobuf_buffer *buf);
|