1 #ifndef _DRM_AUTH_H_ 2 #define _DRM_AUTH_H_ 3 4 /* 5 * Internal Header for the Direct Rendering Manager 6 * 7 * Copyright 2016 Intel Corporation 8 * 9 * Author: Daniel Vetter <daniel.vetter@ffwll.ch> 10 * 11 * Permission is hereby granted, free of charge, to any person obtaining a 12 * copy of this software and associated documentation files (the "Software"), 13 * to deal in the Software without restriction, including without limitation 14 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 15 * and/or sell copies of the Software, and to permit persons to whom the 16 * Software is furnished to do so, subject to the following conditions: 17 * 18 * The above copyright notice and this permission notice (including the next 19 * paragraph) shall be included in all copies or substantial portions of the 20 * Software. 21 * 22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 25 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 26 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 27 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 28 * OTHER DEALINGS IN THE SOFTWARE. 29 */ 30 31 #include <linux/idr.h> 32 #include <linux/kref.h> 33 #include <linux/wait.h> 34 35 struct drm_file; 36 struct drm_hw_lock; 37 38 /* 39 * Legacy DRI1 locking data structure. Only here instead of in drm_legacy.h for 40 * include ordering reasons. 41 * 42 * DO NOT USE. 43 */ 44 struct drm_lock_data { 45 struct drm_hw_lock *hw_lock; 46 struct drm_file *file_priv; 47 wait_queue_head_t lock_queue; 48 unsigned long lock_time; 49 spinlock_t spinlock; 50 uint32_t kernel_waiters; 51 uint32_t user_waiters; 52 int idle_has_lock; 53 }; 54 55 /** 56 * struct drm_master - drm master structure 57 * 58 * @refcount: Refcount for this master object. 59 * @dev: Link back to the DRM device 60 * @driver_priv: Pointer to driver-private information. 61 * @lessor: Lease holder 62 * @lessee_id: id for lessees. Owners always have id 0 63 * @lessee_list: other lessees of the same master 64 * @lessees: drm_masters leasing from this one 65 * @leases: Objects leased to this drm_master. 66 * @lessee_idr: All lessees under this owner (only used where lessor == NULL) 67 * 68 * Note that master structures are only relevant for the legacy/primary device 69 * nodes, hence there can only be one per device, not one per drm_minor. 70 */ 71 struct drm_master { 72 struct kref refcount; 73 struct drm_device *dev; 74 /** 75 * @unique: Unique identifier: e.g. busid. Protected by 76 * &drm_device.master_mutex. 77 */ 78 char *unique; 79 /** 80 * @unique_len: Length of unique field. Protected by 81 * &drm_device.master_mutex. 82 */ 83 int unique_len; 84 /** 85 * @magic_map: Map of used authentication tokens. Protected by 86 * &drm_device.master_mutex. 87 */ 88 struct idr magic_map; 89 void *driver_priv; 90 91 /* Tree of display resource leases, each of which is a drm_master struct 92 * All of these get activated simultaneously, so drm_device master points 93 * at the top of the tree (for which lessor is NULL). Protected by 94 * &drm_device.mode_config.idr_mutex. 95 */ 96 97 struct drm_master *lessor; 98 int lessee_id; 99 struct list_head lessee_list; 100 struct list_head lessees; 101 struct idr leases; 102 struct idr lessee_idr; 103 /* private: */ 104 #if IS_ENABLED(CONFIG_DRM_LEGACY) 105 struct drm_lock_data lock; 106 #endif 107 }; 108 109 struct drm_master *drm_master_get(struct drm_master *master); 110 void drm_master_put(struct drm_master **master); 111 bool drm_is_current_master(struct drm_file *fpriv); 112 113 struct drm_master *drm_master_create(struct drm_device *dev); 114 115 #endif 116
