/*
   * helper functions for vmalloc capture buffers
   *

   * The functions expect the hardware being able to scatter gather

   * (i.e. the buffers are not linear in physical memory, but fragmented
   * into PAGE_SIZE chunks).  They also assume the driver does not need
   * to touch the video data.
   *
   * (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2
   */

  #ifndef _VIDEOBUF_VMALLOC_H
  #define _VIDEOBUF_VMALLOC_H

  
  #include <media/videobuf-core.h>
  
  /* --------------------------------------------------------------------- */

  struct videobuf_vmalloc_memory {

  	u32                 magic;

  	void                *vaddr;

  	/* remap_vmalloc_range seems to need to run
  	 * after mmap() on some cases */

  	struct vm_area_struct *vma;
  };

  void videobuf_queue_vmalloc_init(struct videobuf_queue *q,

  			 const struct videobuf_queue_ops *ops,

  			 struct device *dev,

  			 spinlock_t *irqlock,
  			 enum v4l2_buf_type type,
  			 enum v4l2_field field,
  			 unsigned int msize,

  			 void *priv,
  			 struct mutex *ext_lock);

  void *videobuf_to_vmalloc(struct videobuf_buffer *buf);

  void videobuf_vmalloc_free(struct videobuf_buffer *buf);

  
  #endif