81  * device. However, this doesn't mean that the minor is active. Minors are
100 	struct drm_minor *minor = data;  in drm_minor_alloc_release()  local
103 	WARN_ON(dev != minor->dev);  in drm_minor_alloc_release()
105 	put_device(minor->kdev);  in drm_minor_alloc_release()
108 	idr_remove(&drm_minors_idr, minor->index);  in drm_minor_alloc_release()
114 	struct drm_minor *minor;  in drm_minor_alloc()  local
118 	minor = drmm_kzalloc(dev, sizeof(*minor), GFP_KERNEL);  in drm_minor_alloc()
119 	if (!minor)  in drm_minor_alloc()
122 	minor->type = type;  in drm_minor_alloc()
123 	minor->dev = dev;  in drm_minor_alloc()
138 	minor->index = r;  in drm_minor_alloc()
140 	r = drmm_add_action_or_reset(dev, drm_minor_alloc_release, minor);  in drm_minor_alloc()
144 	minor->kdev = drm_sysfs_minor_alloc(minor);  in drm_minor_alloc()
145 	if (IS_ERR(minor->kdev))  in drm_minor_alloc()
146 		return PTR_ERR(minor->kdev);  in drm_minor_alloc()
148 	*drm_minor_get_slot(dev, type) = minor;  in drm_minor_alloc()
154 	struct drm_minor *minor;  in drm_minor_register()  local
160 	minor = *drm_minor_get_slot(dev, type);  in drm_minor_register()
161 	if (!minor)  in drm_minor_register()
164 	ret = drm_debugfs_init(minor, minor->index, drm_debugfs_root);  in drm_minor_register()
170 	ret = device_add(minor->kdev);  in drm_minor_register()
174 	/* replace NULL with @minor so lookups will succeed from now on */  in drm_minor_register()
176 	idr_replace(&drm_minors_idr, minor, minor->index);  in drm_minor_register()
179 	DRM_DEBUG("new minor registered %d\n", minor->index);  in drm_minor_register()
183 	drm_debugfs_cleanup(minor);  in drm_minor_register()
189 	struct drm_minor *minor;  in drm_minor_unregister()  local
192 	minor = *drm_minor_get_slot(dev, type);  in drm_minor_unregister()
193 	if (!minor || !device_is_registered(minor->kdev))  in drm_minor_unregister()
196 	/* replace @minor with NULL so lookups will fail from now on */  in drm_minor_unregister()
198 	idr_replace(&drm_minors_idr, NULL, minor->index);  in drm_minor_unregister()
201 	device_del(minor->kdev);  in drm_minor_unregister()
202 	dev_set_drvdata(minor->kdev, NULL); /* safety belt */  in drm_minor_unregister()
203 	drm_debugfs_cleanup(minor);  in drm_minor_unregister()
207  * Looks up the given minor-ID and returns the respective DRM-minor object. The
211  * As long as you hold this minor, it is guaranteed that the object and the
212  * minor->dev pointer will stay valid! However, the device may get unplugged and
213  * unregistered while you hold the minor.
217 	struct drm_minor *minor;  in drm_minor_acquire()  local
221 	minor = idr_find(&drm_minors_idr, minor_id);  in drm_minor_acquire()
222 	if (minor)  in drm_minor_acquire()
223 		drm_dev_get(minor->dev);  in drm_minor_acquire()
226 	if (!minor) {  in drm_minor_acquire()
228 	} else if (drm_dev_is_unplugged(minor->dev)) {  in drm_minor_acquire()
229 		drm_dev_put(minor->dev);  in drm_minor_acquire()
233 	return minor;  in drm_minor_acquire()
236 void drm_minor_release(struct drm_minor *minor)  in drm_minor_release()  argument
238 	drm_dev_put(minor->dev);  in drm_minor_release()
791 	struct drm_minor *minor;  in create_compat_control_link()  local
798 	minor = *drm_minor_get_slot(dev, DRM_MINOR_PRIMARY);  in create_compat_control_link()
799 	if (!minor)  in create_compat_control_link()
811 	name = kasprintf(GFP_KERNEL, "controlD%d", minor->index + 64);  in create_compat_control_link()
815 	ret = sysfs_create_link(minor->kdev->kobj.parent,  in create_compat_control_link()
816 				&minor->kdev->kobj,  in create_compat_control_link()
826 	struct drm_minor *minor;  in remove_compat_control_link()  local
832 	minor = *drm_minor_get_slot(dev, DRM_MINOR_PRIMARY);  in remove_compat_control_link()
833 	if (!minor)  in remove_compat_control_link()
836 	name = kasprintf(GFP_KERNEL, "controlD%d", minor->index + 64);  in remove_compat_control_link()
840 	sysfs_remove_link(minor->kdev->kobj.parent, name);  in remove_compat_control_link()
901 	DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",  in drm_dev_register()
902 		 driver->name, driver->major, driver->minor,  in drm_dev_register()
987  *  - DRM minor management
992  * interface registered on a DRM device, you can request minor numbers from DRM
995  * registered minor.
1001 	struct drm_minor *minor;  in drm_stub_open()  local
1006 	minor = drm_minor_acquire(iminor(inode));  in drm_stub_open()
1007 	if (IS_ERR(minor))  in drm_stub_open()
1008 		return PTR_ERR(minor);  in drm_stub_open()
1010 	new_fops = fops_get(minor->dev->driver->fops);  in drm_stub_open()
1023 	drm_minor_release(minor);  in drm_stub_open()