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/ usr / src / linux-headers-6.8.0-64 / include / drm /

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drm_auth.h

#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

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	drwxr-xr-x	2025-07-18 06:24:58
..	dir	-	root/root	drwxr-xr-x	2025-07-18 06:24:57
bridge	dir	-	root/root	drwxr-xr-x	2025-07-18 06:24:58
display	dir	-	root/root	drwxr-xr-x	2025-07-18 06:24:58
i2c	dir	-	root/root	drwxr-xr-x	2025-07-18 06:24:58
ttm	dir	-	root/root	drwxr-xr-x	2025-07-18 06:24:58
amd_asic_type.h	text/x-c	2.33 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_accel.h	text/x-c	2.25 KB	root/root	-rw-r--r--	2025-06-15 01:23:51
drm_aperture.h	text/x-c	1.06 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_atomic.h	text/x-c	41.59 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_atomic_helper.h	text/x-c	10.78 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_atomic_state_helper.h	text/x-c	4.42 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_atomic_uapi.h	text/x-c	2.06 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_audio_component.h	text/x-c	3.84 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_auth.h	text/x-c	4.18 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_blend.h	text/x-c	2.35 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_bridge.h	text/x-c	34.88 KB	root/root	-rw-r--r--	2025-06-15 01:23:51
drm_bridge_connector.h	text/x-c	405 B	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_buddy.h	text/x-c	4.17 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_cache.h	text/x-c	3.3 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_client.h	text/x-c	5.04 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_color_mgmt.h	text/x-c	3.91 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_connector.h	text/x-c	65.08 KB	root/root	-rw-r--r--	2025-06-15 01:23:51
drm_crtc.h	text/x-c	44.52 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_crtc_helper.h	text/x-c	2.51 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_damage_helper.h	text/x-c	3.33 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_debugfs.h	text/x-c	5.68 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_debugfs_crc.h	text/x-c	2.66 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_device.h	text/x-c	7.6 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_displayid.h	text/x-c	4.99 KB	root/root	-rw-r--r--	2025-06-15 01:23:51
drm_drv.h	text/x-c	17.81 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_edid.h	text/x-c	15.48 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_eld.h	text/x-c	4.76 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_encoder.h	text/x-c	11.07 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_encoder_slave.h	text/x-c	6.46 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_exec.h	text/x-c	4.29 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_fb_dma_helper.h	text/x-c	575 B	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_fb_helper.h	text/x-c	11.75 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_fbdev_dma.h	text/x-c	333 B	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_fbdev_generic.h	text/x-c	349 B	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_file.h	text/x-c	14.13 KB	root/root	-rw-r--r--	2025-06-15 01:23:51
drm_fixed.h	text/x-c	4.83 KB	root/root	-rw-r--r--	2025-06-15 01:23:51
drm_flip_work.h	text/x-c	2.63 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_format_helper.h	text/x-c	5.33 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_fourcc.h	text/x-c	9.91 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_framebuffer.h	text/x-c	9.84 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_gem.h	text/x-c	18.28 KB	root/root	-rw-r--r--	2025-06-15 01:23:51
drm_gem_atomic_helper.h	text/x-c	5.52 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_gem_dma_helper.h	text/x-c	9.26 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_gem_framebuffer_helper.h	text/x-c	1.93 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_gem_shmem_helper.h	text/x-c	7.93 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_gem_ttm_helper.h	text/x-c	822 B	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_gem_vram_helper.h	text/x-c	6.08 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_gpuvm.h	text/x-c	33.54 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_ioctl.h	text/x-c	5.82 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_kunit_helpers.h	text/x-c	3.29 KB	root/root	-rw-r--r--	2025-06-15 01:23:51
drm_lease.h	text/x-c	1010 B	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_managed.h	text/x-c	3.9 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_mipi_dbi.h	text/x-c	6.87 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_mipi_dsi.h	text/x-c	13.22 KB	root/root	-rw-r--r--	2025-06-15 01:23:51
drm_mm.h	text/x-c	17.53 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_mode_config.h	text/x-c	32.81 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_mode_object.h	text/x-c	5.46 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_modes.h	text/x-asm	19.9 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_modeset_helper.h	text/x-c	1.77 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_modeset_helper_vtables.h	text/x-c	59.37 KB	root/root	-rw-r--r--	2025-06-15 01:23:51
drm_modeset_lock.h	text/x-c	7.07 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_module.h	text/x-c	3.72 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_of.h	text/x-c	5.22 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_panel.h	text/x-c	8.89 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_pciids.h	text/plain	61.04 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_plane.h	text/x-c	30.92 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_plane_helper.h	text/x-c	2.22 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_prime.h	text/x-c	4.06 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_print.h	text/x-c	20.39 KB	root/root	-rw-r--r--	2025-06-15 01:23:51
drm_privacy_screen_consumer.h	text/x-c	1.94 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_privacy_screen_driver.h	text/x-c	2.99 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_privacy_screen_machine.h	text/x-c	1.25 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_probe_helper.h	text/x-c	1.57 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_property.h	text/x-c	11.99 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_rect.h	text/x-c	7.17 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_self_refresh_helper.h	text/x-c	594 B	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_simple_kms_helper.h	text/x-c	9.52 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_suballoc.h	text/x-c	2.75 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_syncobj.h	text/x-c	3.95 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_sysfs.h	text/x-c	512 B	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_util.h	text/x-c	2.58 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_utils.h	text/x-c	592 B	root/root	-rw-r--r--	2025-06-15 01:23:51
drm_vblank.h	text/x-c	9.11 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_vblank_work.h	text/x-c	1.91 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_vma_manager.h	text/x-c	8.23 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
drm_writeback.h	text/x-c	4.45 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
gma_drm.h	text/plain	413 B	root/root	-rw-r--r--	2024-03-11 02:08:09
gpu_scheduler.h	text/x-c	20.85 KB	root/root	-rw-r--r--	2025-06-15 01:23:51
gud.h	text/x-c	11.65 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
i915_component.h	text/x-c	1.81 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
i915_drm.h	text/x-c	3.57 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
i915_gsc_proxy_mei_interface.h	text/x-c	1.52 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
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i915_pxp_tee_interface.h	text/x-c	1.28 KB	root/root	-rw-r--r--	2024-03-11 02:08:09
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