1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * helper functions for physically contiguous capture buffers
4  *
5  * The functions support hardware lacking scatter gather support
6  * (i.e. the buffers must be linear in physical memory)
7  *
8  * Copyright (c) 2008 Magnus Damm
9  */
10 #ifndef _VIDEOBUF_DMA_CONTIG_H
11 #define _VIDEOBUF_DMA_CONTIG_H
12 
13 #include <linux/dma-mapping.h>
14 #include <media/videobuf-core.h>
15 
16 void videobuf_queue_dma_contig_init(struct videobuf_queue *q,
17 				    const struct videobuf_queue_ops *ops,
18 				    struct device *dev,
19 				    spinlock_t *irqlock,
20 				    enum v4l2_buf_type type,
21 				    enum v4l2_field field,
22 				    unsigned int msize,
23 				    void *priv,
24 				    struct mutex *ext_lock);
25 
26 dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf);
27 void videobuf_dma_contig_free(struct videobuf_queue *q,
28 			      struct videobuf_buffer *buf);
29 
30 #endif /* _VIDEOBUF_DMA_CONTIG_H */
31