#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
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