gpu/drm/drm_drv.c

81  * device. However, this doesn't mean that the minor is active. Minors are
102 	struct drm_minor *minor = data;
105 	WARN_ON(dev != minor->dev);
107 	put_device(minor->kdev);
109 	if (minor->type == DRM_MINOR_ACCEL) {
110 		accel_minor_remove(minor->index);
113 		idr_remove(&drm_minors_idr, minor->index);
120 	struct drm_minor *minor;
124 	minor = drmm_kzalloc(dev, sizeof(*minor), GFP_KERNEL);
125 	if (!minor)
128 	minor->type = type;
129 	minor->dev = dev;
148 	minor->index = r;
150 	r = drmm_add_action_or_reset(dev, drm_minor_alloc_release, minor);
154 	minor->kdev = drm_sysfs_minor_alloc(minor);
155 	if (IS_ERR(minor->kdev))
156 		return PTR_ERR(minor->kdev);
158 	*drm_minor_get_slot(dev, type) = minor;
164 	struct drm_minor *minor;
170 	minor = *drm_minor_get_slot(dev, type);
171 	if (!minor)
174 	if (minor->type != DRM_MINOR_ACCEL) {
175 		ret = drm_debugfs_register(minor, minor->index,
183 	ret = device_add(minor->kdev);
187 	/* replace NULL with @minor so lookups will succeed from now on */
188 	if (minor->type == DRM_MINOR_ACCEL) {
189 		accel_minor_replace(minor, minor->index);
192 		idr_replace(&drm_minors_idr, minor, minor->index);
196 	DRM_DEBUG("new minor registered %d\n", minor->index);
200 	drm_debugfs_unregister(minor);
206 	struct drm_minor *minor;
209 	minor = *drm_minor_get_slot(dev, type);
210 	if (!minor || !device_is_registered(minor->kdev))
213 	/* replace @minor with NULL so lookups will fail from now on */
214 	if (minor->type == DRM_MINOR_ACCEL) {
215 		accel_minor_replace(NULL, minor->index);
218 		idr_replace(&drm_minors_idr, NULL, minor->index);
222 	device_del(minor->kdev);
223 	dev_set_drvdata(minor->kdev, NULL); /* safety belt */
224 	drm_debugfs_unregister(minor);
228  * Looks up the given minor-ID and returns the respective DRM-minor object. The
232  * As long as you hold this minor, it is guaranteed that the object and the
233  * minor->dev pointer will stay valid! However, the device may get unplugged and
234  * unregistered while you hold the minor.
238 	struct drm_minor *minor;
242 	minor = idr_find(&drm_minors_idr, minor_id);
243 	if (minor)
244 		drm_dev_get(minor->dev);
247 	if (!minor) {
249 	} else if (drm_dev_is_unplugged(minor->dev)) {
250 		drm_dev_put(minor->dev);
254 	return minor;
257 void drm_minor_release(struct drm_minor *minor)
259 	drm_dev_put(minor->dev);
825 	struct drm_minor *minor;
832 	minor = *drm_minor_get_slot(dev, DRM_MINOR_PRIMARY);
833 	if (!minor)
845 	name = kasprintf(GFP_KERNEL, "controlD%d", minor->index + 64);
849 	ret = sysfs_create_link(minor->kdev->kobj.parent,
850 				&minor->kdev->kobj,
860 	struct drm_minor *minor;
866 	minor = *drm_minor_get_slot(dev, DRM_MINOR_PRIMARY);
867 	if (!minor)
870 	name = kasprintf(GFP_KERNEL, "controlD%d", minor->index + 64);
874 	sysfs_remove_link(minor->kdev->kobj.parent, name);
947 	DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
948 		 driver->name, driver->major, driver->minor,
1015  *  - DRM minor management
1020  * interface registered on a DRM device, you can request minor numbers from DRM
1023  * registered minor.
1029 	struct drm_minor *minor;
1034 	minor = drm_minor_acquire(iminor(inode));
1035 	if (IS_ERR(minor))
1036 		return PTR_ERR(minor);
1038 	new_fops = fops_get(minor->dev->driver->fops);
1051 	drm_minor_release(minor);