LXR linux/include/media/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 */
  31