include/drm/drm_auth.h

   1 /*
   2  * Internal Header for the Direct Rendering Manager
   3  *
   4  * Copyright 2016 Intel Corporation
   5  *
   6  * Author: Daniel Vetter <daniel.vetter@ffwll.ch>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25  * OTHER DEALINGS IN THE SOFTWARE.
  26  */
  27
  28 #ifndef _DRM_AUTH_H_
  29 #define _DRM_AUTH_H_
  30
  31 /**
  32  * struct drm_master - drm master structure
  33  *
  34  * @refcount: Refcount for this master object.
  35  * @dev: Link back to the DRM device
  36  * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
  37  * @unique_len: Length of unique field. Protected by drm_global_mutex.
  38  * @magic_map: Map of used authentication tokens. Protected by struct_mutex.
  39  * @lock: DRI lock information.
  40  * @driver_priv: Pointer to driver-private information.
  41  *
  42  * Note that master structures are only relevant for the legacy/primary device
  43  * nodes, hence there can only be one per device, not one per drm_minor.
  44  */
  45 struct drm_master {
  46         struct kref refcount;
  47         struct drm_device *dev;
  48         char *unique;
  49         int unique_len;
  50         struct idr magic_map;
  51         struct drm_lock_data lock;
  52         void *driver_priv;
  53 };
  54
  55 struct drm_master *drm_master_get(struct drm_master *master);
  56 void drm_master_put(struct drm_master **master);
  57 bool drm_is_current_master(struct drm_file *fpriv);
  58
  59 #endif