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 * Legacy DRI1 locking data structure. Only here instead of in drm_legacy.h for 33 * include ordering reasons. 34 * 35 * DO NOT USE. 36 */ 37 struct drm_lock_data { 38 struct drm_hw_lock *hw_lock; 39 struct drm_file *file_priv; 40 wait_queue_head_t lock_queue; 41 unsigned long lock_time; 42 spinlock_t spinlock; 43 uint32_t kernel_waiters; 44 uint32_t user_waiters; 45 int idle_has_lock; 46 }; 47 48 /** 49 * struct drm_master - drm master structure 50 * 51 * @refcount: Refcount for this master object. 52 * @dev: Link back to the DRM device 53 * @lock: DRI1 lock information. 54 * @driver_priv: Pointer to driver-private information. 55 * @lessor: Lease holder 56 * @lessee_id: id for lessees. Owners always have id 0 57 * @lessee_list: other lessees of the same master 58 * @lessees: drm_masters leasing from this one 59 * @leases: Objects leased to this drm_master. 60 * @lessee_idr: All lessees under this owner (only used where lessor == NULL) 61 * 62 * Note that master structures are only relevant for the legacy/primary device 63 * nodes, hence there can only be one per device, not one per drm_minor. 64 */ 65 struct drm_master { 66 struct kref refcount; 67 struct drm_device *dev; 68 /** 69 * @unique: Unique identifier: e.g. busid. Protected by 70 * &drm_device.master_mutex. 71 */ 72 char *unique; 73 /** 74 * @unique_len: Length of unique field. Protected by 75 * &drm_device.master_mutex. 76 */ 77 int unique_len; 78 /** 79 * @magic_map: Map of used authentication tokens. Protected by 80 * &drm_device.master_mutex. 81 */ 82 struct idr magic_map; 83 struct drm_lock_data lock; 84 void *driver_priv; 85 86 /* Tree of display resource leases, each of which is a drm_master struct 87 * All of these get activated simultaneously, so drm_device master points 88 * at the top of the tree (for which lessor is NULL). Protected by 89 * &drm_device.mode_config.idr_mutex. 90 */ 91 92 struct drm_master *lessor; 93 int lessee_id; 94 struct list_head lessee_list; 95 struct list_head lessees; 96 struct idr leases; 97 struct idr lessee_idr; 98 }; 99 100 struct drm_master *drm_master_get(struct drm_master *master); 101 void drm_master_put(struct drm_master **master); 102 bool drm_is_current_master(struct drm_file *fpriv); 103 104 struct drm_master *drm_master_create(struct drm_device *dev); 105 106 #endif 107