83  * device. However, this doesn't mean that the minor is active. Minors are
116 	struct drm_minor *minor = data;  in drm_minor_alloc_release()  local
118 	WARN_ON(dev != minor->dev);  in drm_minor_alloc_release()
120 	put_device(minor->kdev);  in drm_minor_alloc_release()
122 	xa_erase(drm_minor_get_xa(minor->type), minor->index);  in drm_minor_alloc_release()
127  * minor allocation scheme where minors 0-63 are primary nodes, 64-127 are control nodes,
141 	struct drm_minor *minor;  in drm_minor_alloc()  local
144 	minor = drmm_kzalloc(dev, sizeof(*minor), GFP_KERNEL);  in drm_minor_alloc()
145 	if (!minor)  in drm_minor_alloc()
148 	minor->type = type;  in drm_minor_alloc()
149 	minor->dev = dev;  in drm_minor_alloc()
151 	r = xa_alloc(drm_minor_get_xa(type), &minor->index,  in drm_minor_alloc()
154 		r = xa_alloc(&drm_minors_xa, &minor->index,  in drm_minor_alloc()
159 	r = drmm_add_action_or_reset(dev, drm_minor_alloc_release, minor);  in drm_minor_alloc()
163 	minor->kdev = drm_sysfs_minor_alloc(minor);  in drm_minor_alloc()
164 	if (IS_ERR(minor->kdev))  in drm_minor_alloc()
165 		return PTR_ERR(minor->kdev);  in drm_minor_alloc()
167 	*drm_minor_get_slot(dev, type) = minor;  in drm_minor_alloc()
173 	struct drm_minor *minor;  in drm_minor_register()  local
179 	minor = *drm_minor_get_slot(dev, type);  in drm_minor_register()
180 	if (!minor)  in drm_minor_register()
183 	if (minor->type != DRM_MINOR_ACCEL) {  in drm_minor_register()
184 		ret = drm_debugfs_register(minor, minor->index,  in drm_minor_register()
192 	ret = device_add(minor->kdev);  in drm_minor_register()
196 	/* replace NULL with @minor so lookups will succeed from now on */  in drm_minor_register()
197 	entry = xa_store(drm_minor_get_xa(type), minor->index, minor, GFP_KERNEL);  in drm_minor_register()
204 	DRM_DEBUG("new minor registered %d\n", minor->index);  in drm_minor_register()
208 	drm_debugfs_unregister(minor);  in drm_minor_register()
214 	struct drm_minor *minor;  in drm_minor_unregister()  local
216 	minor = *drm_minor_get_slot(dev, type);  in drm_minor_unregister()
217 	if (!minor || !device_is_registered(minor->kdev))  in drm_minor_unregister()
220 	/* replace @minor with NULL so lookups will fail from now on */  in drm_minor_unregister()
221 	xa_store(drm_minor_get_xa(type), minor->index, NULL, GFP_KERNEL);  in drm_minor_unregister()
223 	device_del(minor->kdev);  in drm_minor_unregister()
224 	dev_set_drvdata(minor->kdev, NULL); /* safety belt */  in drm_minor_unregister()
225 	drm_debugfs_unregister(minor);  in drm_minor_unregister()
229  * Looks up the given minor-ID and returns the respective DRM-minor object. The
233  * As long as you hold this minor, it is guaranteed that the object and the
234  * minor->dev pointer will stay valid! However, the device may get unplugged and
235  * unregistered while you hold the minor.
239 	struct drm_minor *minor;  in drm_minor_acquire()  local
242 	minor = xa_load(minor_xa, minor_id);  in drm_minor_acquire()
243 	if (minor)  in drm_minor_acquire()
244 		drm_dev_get(minor->dev);  in drm_minor_acquire()
247 	if (!minor) {  in drm_minor_acquire()
249 	} else if (drm_dev_is_unplugged(minor->dev)) {  in drm_minor_acquire()
250 		drm_dev_put(minor->dev);  in drm_minor_acquire()
254 	return minor;  in drm_minor_acquire()
257 void drm_minor_release(struct drm_minor *minor)  in drm_minor_release()  argument
259 	drm_dev_put(minor->dev);  in drm_minor_release()
857 	struct drm_minor *minor;  in create_compat_control_link()  local
864 	minor = *drm_minor_get_slot(dev, DRM_MINOR_PRIMARY);  in create_compat_control_link()
865 	if (!minor)  in create_compat_control_link()
877 	name = kasprintf(GFP_KERNEL, "controlD%d", minor->index + 64);  in create_compat_control_link()
881 	ret = sysfs_create_link(minor->kdev->kobj.parent,  in create_compat_control_link()
882 				&minor->kdev->kobj,  in create_compat_control_link()
892 	struct drm_minor *minor;  in remove_compat_control_link()  local
898 	minor = *drm_minor_get_slot(dev, DRM_MINOR_PRIMARY);  in remove_compat_control_link()
899 	if (!minor)  in remove_compat_control_link()
902 	name = kasprintf(GFP_KERNEL, "controlD%d", minor->index + 64);  in remove_compat_control_link()
906 	sysfs_remove_link(minor->kdev->kobj.parent, name);  in remove_compat_control_link()
980 	DRM_INFO("Initialized %s %d.%d.%d for %s on minor %d\n",  in drm_dev_register()
981 		 driver->name, driver->major, driver->minor,  in drm_dev_register()
1050  *  - DRM minor management
1055  * interface registered on a DRM device, you can request minor numbers from DRM
1058  * registered minor.
1064 	struct drm_minor *minor;  in drm_stub_open()  local
1069 	minor = drm_minor_acquire(&drm_minors_xa, iminor(inode));  in drm_stub_open()
1070 	if (IS_ERR(minor))  in drm_stub_open()
1071 		return PTR_ERR(minor);  in drm_stub_open()
1073 	new_fops = fops_get(minor->dev->driver->fops);  in drm_stub_open()
1086 	drm_minor_release(minor);  in drm_stub_open()