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 * @lock: DRI1 lock information. 37 * @driver_priv: Pointer to driver-private information. 38 * 39 * Note that master structures are only relevant for the legacy/primary device 40 * nodes, hence there can only be one per device, not one per drm_minor. 41 */ 42 struct drm_master { 43 struct kref refcount; 44 struct drm_device *dev; 45 /** 46 * @unique: Unique identifier: e.g. busid. Protected by 47 * &drm_device.master_mutex. 48 */ 49 char *unique; 50 /** 51 * @unique_len: Length of unique field. Protected by 52 * &drm_device.master_mutex. 53 */ 54 int unique_len; 55 /** 56 * @magic_map: Map of used authentication tokens. Protected by 57 * &drm_device.master_mutex. 58 */ 59 struct idr magic_map; 60 struct drm_lock_data lock; 61 void *driver_priv; 62 }; 63 64 struct drm_master *drm_master_get(struct drm_master *master); 65 void drm_master_put(struct drm_master **master); 66 bool drm_is_current_master(struct drm_file *fpriv); 67 68 #endif 69