2 * Internal Header for the Direct Rendering Manager
4 * Copyright 2016 Intel Corporation
6 * Author: Daniel Vetter <daniel.vetter@ffwll.ch>
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32 * Legacy DRI1 locking data structure. Only here instead of in drm_legacy.h for
33 * include ordering reasons.
37 struct drm_lock_data {
38 struct drm_hw_lock *hw_lock;
39 struct drm_file *file_priv;
40 wait_queue_head_t lock_queue;
41 unsigned long lock_time;
43 uint32_t kernel_waiters;
44 uint32_t user_waiters;
49 * struct drm_master - drm master structure
51 * @refcount: Refcount for this master object.
52 * @dev: Link back to the DRM device
53 * @lock: DRI1 lock information.
54 * @driver_priv: Pointer to driver-private information.
55 * @lessor: Lease holder
56 * @lessee_id: id for lessees. Owners always have id 0
57 * @lessee_list: other lessees of the same master
58 * @lessees: drm_masters leasing from this one
59 * @leases: Objects leased to this drm_master.
60 * @lessee_idr: All lessees under this owner (only used where lessor == NULL)
62 * Note that master structures are only relevant for the legacy/primary device
63 * nodes, hence there can only be one per device, not one per drm_minor.
67 struct drm_device *dev;
69 * @unique: Unique identifier: e.g. busid. Protected by
70 * &drm_device.master_mutex.
74 * @unique_len: Length of unique field. Protected by
75 * &drm_device.master_mutex.
79 * @magic_map: Map of used authentication tokens. Protected by
80 * &drm_device.master_mutex.
83 struct drm_lock_data lock;
86 /* Tree of display resource leases, each of which is a drm_master struct
87 * All of these get activated simultaneously, so drm_device master points
88 * at the top of the tree (for which lessor is NULL). Protected by
89 * &drm_device.mode_config.idr_mutex.
92 struct drm_master *lessor;
94 struct list_head lessee_list;
95 struct list_head lessees;
97 struct idr lessee_idr;
100 struct drm_master *drm_master_get(struct drm_master *master);
101 void drm_master_put(struct drm_master **master);
102 bool drm_is_current_master(struct drm_file *fpriv);
104 struct drm_master *drm_master_create(struct drm_device *dev);