LXR linux/include/media/videobuf2-memops.h

   1/*
   2 * videobuf2-memops.h - generic memory handling routines for videobuf2
   3 *
   4 * Copyright (C) 2010 Samsung Electronics
   5 *
   6 * Author: Pawel Osciak <pawel@osciak.com>
   7 *         Marek Szyprowski <m.szyprowski@samsung.com>
   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.
  12 */
  13
  14#ifndef _MEDIA_VIDEOBUF2_MEMOPS_H
  15#define _MEDIA_VIDEOBUF2_MEMOPS_H
  16
  17#include <media/videobuf2-v4l2.h>
  18#include <linux/mm.h>
  19#include <linux/refcount.h>
  20
  21/**
  22 * struct vb2_vmarea_handler - common vma refcount tracking handler.
  23 *
  24 * @refcount:   pointer to &refcount_t entry in the buffer.
  25 * @put:        callback to function that decreases buffer refcount.
  26 * @arg:        argument for @put callback.
  27 */
  28struct vb2_vmarea_handler {
  29        refcount_t              *refcount;
  30        void                    (*put)(void *arg);
  31        void                    *arg;
  32};
  33
  34extern const struct vm_operations_struct vb2_common_vm_ops;
  35
  36struct frame_vector *vb2_create_framevec(unsigned long start,
  37                                         unsigned long length,
  38                                         bool write);
  39void vb2_destroy_framevec(struct frame_vector *vec);
  40
  41#endif
  42