Edit File: drm_auth.h
/* * Internal Header for the Direct Rendering Manager * * Copyright 2016 Intel Corporation * * Author: Daniel Vetter <daniel.vetter@ffwll.ch> * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #ifndef _DRM_AUTH_H_ #define _DRM_AUTH_H_ /* * Legacy DRI1 locking data structure. Only here instead of in drm_legacy.h for * include ordering reasons. * * DO NOT USE. */ struct drm_lock_data { struct drm_hw_lock *hw_lock; struct drm_file *file_priv; wait_queue_head_t lock_queue; unsigned long lock_time; spinlock_t spinlock; uint32_t kernel_waiters; uint32_t user_waiters; int idle_has_lock; }; /** * struct drm_master - drm master structure * * @refcount: Refcount for this master object. * @dev: Link back to the DRM device * @lock: DRI1 lock information. * @driver_priv: Pointer to driver-private information. * @lessor: Lease holder * @lessee_id: id for lessees. Owners always have id 0 * @lessee_list: other lessees of the same master * @lessees: drm_masters leasing from this one * @leases: Objects leased to this drm_master. * @lessee_idr: All lessees under this owner (only used where lessor == NULL) * * Note that master structures are only relevant for the legacy/primary device * nodes, hence there can only be one per device, not one per drm_minor. */ struct drm_master { struct kref refcount; struct drm_device *dev; /** * @unique: Unique identifier: e.g. busid. Protected by * &drm_device.master_mutex. */ char *unique; /** * @unique_len: Length of unique field. Protected by * &drm_device.master_mutex. */ int unique_len; /** * @magic_map: Map of used authentication tokens. Protected by * &drm_device.master_mutex. */ struct idr magic_map; struct drm_lock_data lock; void *driver_priv; /* Tree of display resource leases, each of which is a drm_master struct * All of these get activated simultaneously, so drm_device master points * at the top of the tree (for which lessor is NULL). Protected by * &drm_device.mode_config.idr_mutex. */ struct drm_master *lessor; int lessee_id; struct list_head lessee_list; struct list_head lessees; struct idr leases; struct idr lessee_idr; }; struct drm_master *drm_master_get(struct drm_master *master); void drm_master_put(struct drm_master **master); bool drm_is_current_master(struct drm_file *fpriv); struct drm_master *drm_master_create(struct drm_device *dev); #endif