140 lines
4.2 KiB
C
140 lines
4.2 KiB
C
#ifndef _DRM_AUTH_H_
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#define _DRM_AUTH_H_
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/*
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* Internal Header for the Direct Rendering Manager
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*
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* Copyright 2016 Intel Corporation
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*
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* Author: Daniel Vetter <daniel.vetter@ffwll.ch>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/idr.h>
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#include <linux/kref.h>
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#include <linux/wait.h>
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struct drm_file;
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/**
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* struct drm_master - drm master structure
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*
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* @refcount: Refcount for this master object.
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* @dev: Link back to the DRM device
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* @driver_priv: Pointer to driver-private information.
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*
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* Note that master structures are only relevant for the legacy/primary device
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* nodes, hence there can only be one per device, not one per drm_minor.
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*/
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struct drm_master {
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struct kref refcount;
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struct drm_device *dev;
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/**
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* @unique: Unique identifier: e.g. busid. Protected by
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* &drm_device.master_mutex.
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*/
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char *unique;
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/**
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* @unique_len: Length of unique field. Protected by
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* &drm_device.master_mutex.
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*/
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int unique_len;
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/**
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* @magic_map: Map of used authentication tokens. Protected by
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* &drm_device.master_mutex.
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*/
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struct idr magic_map;
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void *driver_priv;
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/**
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* @lessor:
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*
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* Lease grantor, only set if this &struct drm_master represents a
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* lessee holding a lease of objects from @lessor. Full owners of the
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* device have this set to NULL.
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*
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* The lessor does not change once it's set in drm_lease_create(), and
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* each lessee holds a reference to its lessor that it releases upon
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* being destroyed in drm_lease_destroy().
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*
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* See also the :ref:`section on display resource leasing
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* <drm_leasing>`.
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*/
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struct drm_master *lessor;
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/**
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* @lessee_id:
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*
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* ID for lessees. Owners (i.e. @lessor is NULL) always have ID 0.
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* Protected by &drm_device.mode_config's &drm_mode_config.idr_mutex.
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*/
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int lessee_id;
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/**
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* @lessee_list:
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*
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* List entry of lessees of @lessor, where they are linked to @lessees.
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* Not used for owners. Protected by &drm_device.mode_config's
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* &drm_mode_config.idr_mutex.
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*/
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struct list_head lessee_list;
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/**
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* @lessees:
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*
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* List of drm_masters leasing from this one. Protected by
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* &drm_device.mode_config's &drm_mode_config.idr_mutex.
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*
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* This list is empty if no leases have been granted, or if all lessees
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* have been destroyed. Since lessors are referenced by all their
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* lessees, this master cannot be destroyed unless the list is empty.
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*/
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struct list_head lessees;
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/**
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* @leases:
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*
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* Objects leased to this drm_master. Protected by
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* &drm_device.mode_config's &drm_mode_config.idr_mutex.
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*
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* Objects are leased all together in drm_lease_create(), and are
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* removed all together when the lease is revoked.
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*/
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struct idr leases;
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/**
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* @lessee_idr:
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*
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* All lessees under this owner (only used where @lessor is NULL).
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* Protected by &drm_device.mode_config's &drm_mode_config.idr_mutex.
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*/
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struct idr lessee_idr;
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};
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struct drm_master *drm_master_get(struct drm_master *master);
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struct drm_master *drm_file_get_master(struct drm_file *file_priv);
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void drm_master_put(struct drm_master **master);
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bool drm_is_current_master(struct drm_file *fpriv);
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struct drm_master *drm_master_create(struct drm_device *dev);
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#endif
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