#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_master - drm master structure * * @refcount: Refcount for this master object. * @dev: Link back to the DRM device * @driver_priv: Pointer to driver-private information. * * 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; 	/**	 * @lessor:	 *	 * Lease grantor, only set if this &struct drm_master represents a	 * lessee holding a lease of objects from @lessor. Full owners of the	 * device have this set to NULL.	 *	 * The lessor does not change once it's set in drm_lease_create(), and	 * each lessee holds a reference to its lessor that it releases upon	 * being destroyed in drm_lease_destroy().	 *	 * See also the :ref:`section on display resource leasing	 * <drm_leasing>`.	 */	struct drm_master *lessor; 	/**	 * @lessee_id:	 *	 * ID for lessees. Owners (i.e. @lessor is NULL) always have ID 0.	 * Protected by &drm_device.mode_config's &drm_mode_config.idr_mutex.	 */	int	lessee_id; 	/**	 * @lessee_list:	 *	 * List entry of lessees of @lessor, where they are linked to @lessees.	 * Not used for owners. Protected by &drm_device.mode_config's	 * &drm_mode_config.idr_mutex.	 */	struct list_head lessee_list; 	/**	 * @lessees:	 *	 * List of drm_masters leasing from this one. Protected by	 * &drm_device.mode_config's &drm_mode_config.idr_mutex.	 *	 * This list is empty if no leases have been granted, or if all lessees	 * have been destroyed. Since lessors are referenced by all their	 * lessees, this master cannot be destroyed unless the list is empty.	 */	struct list_head lessees; 	/**	 * @leases:	 *	 * Objects leased to this drm_master. Protected by	 * &drm_device.mode_config's &drm_mode_config.idr_mutex.	 *	 * Objects are leased all together in drm_lease_create(), and are	 * removed all together when the lease is revoked.	 */	struct idr leases; 	/**	 * @lessee_idr:	 *	 * All lessees under this owner (only used where @lessor is NULL).	 * Protected by &drm_device.mode_config's &drm_mode_config.idr_mutex.	 */	struct idr lessee_idr;}; struct drm_master *drm_master_get(struct drm_master *master);struct drm_master *drm_file_get_master(struct drm_file *file_priv);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