/*
   * videobuf2-memops.h - generic memory handling routines for videobuf2
   *
   * Copyright (C) 2010 Samsung Electronics
   *

   * Author: Pawel Osciak <pawel@osciak.com>

   *	   Marek Szyprowski <m.szyprowski@samsung.com>
   *
   * 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.
   */
  
  #ifndef _MEDIA_VIDEOBUF2_MEMOPS_H
  #define _MEDIA_VIDEOBUF2_MEMOPS_H
  
  #include <media/videobuf2-core.h>
  
  /**
   * vb2_vmarea_handler - common vma refcount tracking handler
   * @refcount:	pointer to refcount entry in the buffer
   * @put:	callback to function that decreases buffer refcount
   * @arg:	argument for @put callback
   */
  struct vb2_vmarea_handler {
  	atomic_t		*refcount;
  	void			(*put)(void *arg);
  	void			*arg;
  };
  
  extern const struct vm_operations_struct vb2_common_vm_ops;
  
  int vb2_get_contig_userptr(unsigned long vaddr, unsigned long size,
  			   struct vm_area_struct **res_vma, dma_addr_t *res_pa);
  
  int vb2_mmap_pfn_range(struct vm_area_struct *vma, unsigned long paddr,
  				unsigned long size,
  				const struct vm_operations_struct *vm_ops,
  				void *priv);
  
  struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma);
  void vb2_put_vma(struct vm_area_struct *vma);
  
  
  #endif