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V4L/DVB: videobuf: prepare to make locking optional in videobuf
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1/*
2 * helper functions for physically contiguous capture buffers
3 *
4 * The functions support hardware lacking scatter gather support
5 * (i.e. the buffers must be linear in physical memory)
6 *
7 * Copyright (c) 2008 Magnus Damm
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2
12 */
13#ifndef _VIDEOBUF_DMA_CONTIG_H
14#define _VIDEOBUF_DMA_CONTIG_H
15
16#include <linux/dma-mapping.h>
17#include <media/videobuf-core.h>
18
19void videobuf_queue_dma_contig_init(struct videobuf_queue *q,
38a54f35 20 const struct videobuf_queue_ops *ops,
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21 struct device *dev,
22 spinlock_t *irqlock,
23 enum v4l2_buf_type type,
24 enum v4l2_field field,
25 unsigned int msize,
26 void *priv);
27
28dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf);
29void videobuf_dma_contig_free(struct videobuf_queue *q,
30 struct videobuf_buffer *buf);
31
32#endif /* _VIDEOBUF_DMA_CONTIG_H */