1*4882a593Smuzhiyun #ifndef _DRM_AUTH_H_ 2*4882a593Smuzhiyun #define _DRM_AUTH_H_ 3*4882a593Smuzhiyun 4*4882a593Smuzhiyun /* 5*4882a593Smuzhiyun * Internal Header for the Direct Rendering Manager 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Copyright 2016 Intel Corporation 8*4882a593Smuzhiyun * 9*4882a593Smuzhiyun * Author: Daniel Vetter <daniel.vetter@ffwll.ch> 10*4882a593Smuzhiyun * 11*4882a593Smuzhiyun * Permission is hereby granted, free of charge, to any person obtaining a 12*4882a593Smuzhiyun * copy of this software and associated documentation files (the "Software"), 13*4882a593Smuzhiyun * to deal in the Software without restriction, including without limitation 14*4882a593Smuzhiyun * the rights to use, copy, modify, merge, publish, distribute, sublicense, 15*4882a593Smuzhiyun * and/or sell copies of the Software, and to permit persons to whom the 16*4882a593Smuzhiyun * Software is furnished to do so, subject to the following conditions: 17*4882a593Smuzhiyun * 18*4882a593Smuzhiyun * The above copyright notice and this permission notice (including the next 19*4882a593Smuzhiyun * paragraph) shall be included in all copies or substantial portions of the 20*4882a593Smuzhiyun * Software. 21*4882a593Smuzhiyun * 22*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 23*4882a593Smuzhiyun * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 24*4882a593Smuzhiyun * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 25*4882a593Smuzhiyun * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 26*4882a593Smuzhiyun * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 27*4882a593Smuzhiyun * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 28*4882a593Smuzhiyun * OTHER DEALINGS IN THE SOFTWARE. 29*4882a593Smuzhiyun */ 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun #include <linux/idr.h> 32*4882a593Smuzhiyun #include <linux/kref.h> 33*4882a593Smuzhiyun #include <linux/wait.h> 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun struct drm_file; 36*4882a593Smuzhiyun struct drm_hw_lock; 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun /* 39*4882a593Smuzhiyun * Legacy DRI1 locking data structure. Only here instead of in drm_legacy.h for 40*4882a593Smuzhiyun * include ordering reasons. 41*4882a593Smuzhiyun * 42*4882a593Smuzhiyun * DO NOT USE. 43*4882a593Smuzhiyun */ 44*4882a593Smuzhiyun struct drm_lock_data { 45*4882a593Smuzhiyun struct drm_hw_lock *hw_lock; 46*4882a593Smuzhiyun struct drm_file *file_priv; 47*4882a593Smuzhiyun wait_queue_head_t lock_queue; 48*4882a593Smuzhiyun unsigned long lock_time; 49*4882a593Smuzhiyun spinlock_t spinlock; 50*4882a593Smuzhiyun uint32_t kernel_waiters; 51*4882a593Smuzhiyun uint32_t user_waiters; 52*4882a593Smuzhiyun int idle_has_lock; 53*4882a593Smuzhiyun }; 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun /** 56*4882a593Smuzhiyun * struct drm_master - drm master structure 57*4882a593Smuzhiyun * 58*4882a593Smuzhiyun * @refcount: Refcount for this master object. 59*4882a593Smuzhiyun * @dev: Link back to the DRM device 60*4882a593Smuzhiyun * @driver_priv: Pointer to driver-private information. 61*4882a593Smuzhiyun * @lessor: Lease holder 62*4882a593Smuzhiyun * @lessee_id: id for lessees. Owners always have id 0 63*4882a593Smuzhiyun * @lessee_list: other lessees of the same master 64*4882a593Smuzhiyun * @lessees: drm_masters leasing from this one 65*4882a593Smuzhiyun * @leases: Objects leased to this drm_master. 66*4882a593Smuzhiyun * @lessee_idr: All lessees under this owner (only used where lessor == NULL) 67*4882a593Smuzhiyun * 68*4882a593Smuzhiyun * Note that master structures are only relevant for the legacy/primary device 69*4882a593Smuzhiyun * nodes, hence there can only be one per device, not one per drm_minor. 70*4882a593Smuzhiyun */ 71*4882a593Smuzhiyun struct drm_master { 72*4882a593Smuzhiyun struct kref refcount; 73*4882a593Smuzhiyun struct drm_device *dev; 74*4882a593Smuzhiyun /** 75*4882a593Smuzhiyun * @unique: Unique identifier: e.g. busid. Protected by 76*4882a593Smuzhiyun * &drm_device.master_mutex. 77*4882a593Smuzhiyun */ 78*4882a593Smuzhiyun char *unique; 79*4882a593Smuzhiyun /** 80*4882a593Smuzhiyun * @unique_len: Length of unique field. Protected by 81*4882a593Smuzhiyun * &drm_device.master_mutex. 82*4882a593Smuzhiyun */ 83*4882a593Smuzhiyun int unique_len; 84*4882a593Smuzhiyun /** 85*4882a593Smuzhiyun * @magic_map: Map of used authentication tokens. Protected by 86*4882a593Smuzhiyun * &drm_device.master_mutex. 87*4882a593Smuzhiyun */ 88*4882a593Smuzhiyun struct idr magic_map; 89*4882a593Smuzhiyun void *driver_priv; 90*4882a593Smuzhiyun 91*4882a593Smuzhiyun /* Tree of display resource leases, each of which is a drm_master struct 92*4882a593Smuzhiyun * All of these get activated simultaneously, so drm_device master points 93*4882a593Smuzhiyun * at the top of the tree (for which lessor is NULL). Protected by 94*4882a593Smuzhiyun * &drm_device.mode_config.idr_mutex. 95*4882a593Smuzhiyun */ 96*4882a593Smuzhiyun 97*4882a593Smuzhiyun struct drm_master *lessor; 98*4882a593Smuzhiyun int lessee_id; 99*4882a593Smuzhiyun struct list_head lessee_list; 100*4882a593Smuzhiyun struct list_head lessees; 101*4882a593Smuzhiyun struct idr leases; 102*4882a593Smuzhiyun struct idr lessee_idr; 103*4882a593Smuzhiyun /* private: */ 104*4882a593Smuzhiyun #if IS_ENABLED(CONFIG_DRM_LEGACY) 105*4882a593Smuzhiyun struct drm_lock_data lock; 106*4882a593Smuzhiyun #endif 107*4882a593Smuzhiyun }; 108*4882a593Smuzhiyun 109*4882a593Smuzhiyun struct drm_master *drm_master_get(struct drm_master *master); 110*4882a593Smuzhiyun void drm_master_put(struct drm_master **master); 111*4882a593Smuzhiyun bool drm_is_current_master(struct drm_file *fpriv); 112*4882a593Smuzhiyun 113*4882a593Smuzhiyun struct drm_master *drm_master_create(struct drm_device *dev); 114*4882a593Smuzhiyun 115*4882a593Smuzhiyun #endif 116