LXR linux/include/media/videobuf-dma-contig.h

   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
  29void videobuf_queue_dma_contig_init_cached(struct videobuf_queue *q,
  30                                           const struct videobuf_queue_ops *ops,
  31                                           struct device *dev,
  32                                           spinlock_t *irqlock,
  33                                           enum v4l2_buf_type type,
  34                                           enum v4l2_field field,
  35                                           unsigned int msize,
  36                                           void *priv,
  37                                           struct mutex *ext_lock);
  38
  39dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf);
  40void videobuf_dma_contig_free(struct videobuf_queue *q,
  41                              struct videobuf_buffer *buf);
  42
  43#endif /* _VIDEOBUF_DMA_CONTIG_H */
  44