[mirror_ubuntu-bionic-kernel.git] / include / drm / 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_

/**
 * 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.
 *
 * 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 struct
	 * &drm_device master_mutex.
	 */
	char *unique;
	/**
	 * @unique_len: Length of unique field. Protected by &struct drm_device
	 * master_mutex.
	 */
	int unique_len;
	/**
	 * @magic_map: Map of used authentication tokens. Protected by struct
	 * &drm_device master_mutex.
	 */
	struct idr magic_map;
	struct drm_lock_data lock;
	void *driver_priv;
};

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);

#endif
Commit	Line	Data
3b96a0b1 DV	1	/*
	2	* Internal Header for the Direct Rendering Manager
	3	*
	4	* Copyright 2016 Intel Corporation
	5	*
	6	* Author: Daniel Vetter <daniel.vetter@ffwll.ch>
	7	*
	8	* Permission is hereby granted, free of charge, to any person obtaining a
	9	* copy of this software and associated documentation files (the "Software"),
	10	* to deal in the Software without restriction, including without limitation
	11	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	12	* and/or sell copies of the Software, and to permit persons to whom the
	13	* Software is furnished to do so, subject to the following conditions:
	14	*
	15	* The above copyright notice and this permission notice (including the next
	16	* paragraph) shall be included in all copies or substantial portions of the
	17	* Software.
	18	*
	19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	20	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	21	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	22	* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
	23	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	24	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	25	* OTHER DEALINGS IN THE SOFTWARE.
	26	*/
	27
	28	#ifndef _DRM_AUTH_H_
	29	#define _DRM_AUTH_H_
	30
	31	/**
	32	* struct drm_master - drm master structure
	33	*
	34	* @refcount: Refcount for this master object.
	35	* @dev: Link back to the DRM device
5acc614a	36	* @lock: DRI1 lock information.
3b96a0b1 DV	37	* @driver_priv: Pointer to driver-private information.
	38	*
	39	* Note that master structures are only relevant for the legacy/primary device
	40	* nodes, hence there can only be one per device, not one per drm_minor.
	41	*/
	42	struct drm_master {
	43	struct kref refcount;
	44	struct drm_device *dev;
5acc614a DV	45	/**
	46	* @unique: Unique identifier: e.g. busid. Protected by struct
	47	* &drm_device master_mutex.
	48	*/
3b96a0b1	49	char *unique;
5acc614a	50	/**
ea0dd85a	51	* @unique_len: Length of unique field. Protected by &struct drm_device
5acc614a DV	52	* master_mutex.
5acc614a DV	53	*/
3b96a0b1	54	int unique_len;
5acc614a DV	55	/**
	56	* @magic_map: Map of used authentication tokens. Protected by struct
	57	* &drm_device master_mutex.
	58	*/
3b96a0b1 DV	59	struct idr magic_map;
	60	struct drm_lock_data lock;
	61	void *driver_priv;
	62	};
	63
	64	struct drm_master drm_master_get(struct drm_master master);
	65	void drm_master_put(struct drm_master **master);
	66	bool drm_is_current_master(struct drm_file *fpriv);
	67
	68	#endif