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 
19 void videobuf_queue_dma_contig_init(struct videobuf_queue *q,
20 				    const struct videobuf_queue_ops *ops,
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 				    struct mutex *ext_lock);
28 
29 dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf);
30 void videobuf_dma_contig_free(struct videobuf_queue *q,
31 			      struct videobuf_buffer *buf);
32 
33 #endif /* _VIDEOBUF_DMA_CONTIG_H */
34