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- #ifndef _DRM_AUTH_H_
- #define _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.
- */
- #include <linux/idr.h>
- #include <linux/kref.h>
- #include <linux/wait.h>
- struct drm_file;
- struct drm_hw_lock;
- /*
- * 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
- * @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;
- 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;
- /* private: */
- #if IS_ENABLED(CONFIG_DRM_LEGACY)
- struct drm_lock_data lock;
- #endif
- };
- 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
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