2 * helper functions for physically contiguous capture buffers
4 * The functions support hardware lacking scatter gather support
5 * (i.e. the buffers must be linear in physical memory)
7 * Copyright (c) 2008 Magnus Damm
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
13 #ifndef _VIDEOBUF_DMA_CONTIG_H
14 #define _VIDEOBUF_DMA_CONTIG_H
16 #include <linux/dma-mapping.h>
17 #include <media/videobuf-core.h>
19 void videobuf_queue_dma_contig_init(struct videobuf_queue *q,
20 const struct videobuf_queue_ops *ops,
23 enum v4l2_buf_type type,
24 enum v4l2_field field,
27 struct mutex *ext_lock);
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);
33 #endif /* _VIDEOBUF_DMA_CONTIG_H */