/* * 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.
*/
/** * 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;
};
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