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,
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
29dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf);
30void videobuf_dma_contig_free(struct videobuf_queue *q,
31			      struct videobuf_buffer *buf);
32
33#endif /* _VIDEOBUF_DMA_CONTIG_H */

 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
16void 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
26dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf);
27void videobuf_dma_contig_free(struct videobuf_queue *q,
28			      struct videobuf_buffer *buf);
29
30#endif /* _VIDEOBUF_DMA_CONTIG_H */