/*
   * Internal Header for the Direct Rendering Manager
   *
   * Copyright 2016 Intel Corporation
   *
   * Author: Daniel Vetter <daniel.vetter@ffwll.ch>
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
   * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   * OTHER DEALINGS IN THE SOFTWARE.
   */
  
  #ifndef _DRM_AUTH_H_
  #define _DRM_AUTH_H_
  
  /**
   * struct drm_master - drm master structure
   *
   * @refcount: Refcount for this master object.
   * @dev: Link back to the DRM device
   * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
   * @unique_len: Length of unique field. Protected by drm_global_mutex.
   * @magic_map: Map of used authentication tokens. Protected by struct_mutex.
   * @lock: DRI lock information.
   * @driver_priv: Pointer to driver-private information.
   *
   * Note that master structures are only relevant for the legacy/primary device
   * nodes, hence there can only be one per device, not one per drm_minor.
   */
  struct drm_master {
  	struct kref refcount;
  	struct drm_device *dev;
  	char *unique;
  	int unique_len;
  	struct idr magic_map;
  	struct drm_lock_data lock;
  	void *driver_priv;
  };
  
  struct drm_master *drm_master_get(struct drm_master *master);
  void drm_master_put(struct drm_master **master);
  bool drm_is_current_master(struct drm_file *fpriv);
  
  #endif