Current File : //usr/src/kernels/3.10.0-1160.83.1.el7.centos.plus.x86_64/include/media/videobuf-dma-contig.h
/*
* helper functions for physically contiguous capture buffers
*
* The functions support hardware lacking scatter gather support
* (i.e. the buffers must be linear in physical memory)
*
* Copyright (c) 2008 Magnus Damm
*
* 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
*/
#ifndef _VIDEOBUF_DMA_CONTIG_H
#define _VIDEOBUF_DMA_CONTIG_H
#include <linux/dma-mapping.h>
#include <media/videobuf-core.h>
void videobuf_queue_dma_contig_init(struct videobuf_queue *q,
const struct videobuf_queue_ops *ops,
struct device *dev,
spinlock_t *irqlock,
enum v4l2_buf_type type,
enum v4l2_field field,
unsigned int msize,
void *priv,
struct mutex *ext_lock);
dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf);
void videobuf_dma_contig_free(struct videobuf_queue *q,
struct videobuf_buffer *buf);
#endif /* _VIDEOBUF_DMA_CONTIG_H */
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