s390/cio/ccwgroup.c

36 static void __ccwgroup_remove_symlinks(struct ccwgroup_device *gdev)
41 	for (i = 0; i < gdev->count; i++) {
43 		sysfs_remove_link(&gdev->dev.kobj, str);
44 		sysfs_remove_link(&gdev->cdev[i]->dev.kobj, "group_device");
50  * @gdev: target ccwgroup device
56 int ccwgroup_set_online(struct ccwgroup_device *gdev)
58 	struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
61 	if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
63 	if (gdev->state == CCWGROUP_ONLINE)
66 		ret = gdrv->set_online(gdev);
70 	gdev->state = CCWGROUP_ONLINE;
72 	atomic_set(&gdev->onoff, 0);
79  * @gdev: target ccwgroup device
86 int ccwgroup_set_offline(struct ccwgroup_device *gdev, bool call_gdrv)
88 	struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
91 	if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
93 	if (gdev->state == CCWGROUP_OFFLINE)
100 		ret = gdrv->set_offline(gdev);
105 	gdev->state = CCWGROUP_OFFLINE;
107 	atomic_set(&gdev->onoff, 0);
116 	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
131 		ret = ccwgroup_set_online(gdev);
133 		ret = ccwgroup_set_offline(gdev, true);
145 	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
148 	online = (gdev->state == CCWGROUP_ONLINE) ? 1 : 0;
157 static void ccwgroup_ungroup(struct ccwgroup_device *gdev)
159 	mutex_lock(&gdev->reg_mutex);
160 	if (device_is_registered(&gdev->dev)) {
161 		__ccwgroup_remove_symlinks(gdev);
162 		device_unregister(&gdev->dev);
164 	mutex_unlock(&gdev->reg_mutex);
171 	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
175 	if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
177 	if (gdev->state != CCWGROUP_OFFLINE) {
183 		ccwgroup_ungroup(gdev);
189 		atomic_set(&gdev->onoff, 0);
206 	struct ccwgroup_device *gdev =
209 	ccwgroup_ungroup(gdev);
210 	put_device(&gdev->dev);
215 	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
218 	for (i = 0; i < gdev->count; i++) {
219 		struct ccw_device *cdev = gdev->cdev[i];
224 			if (dev_get_drvdata(&cdev->dev) == gdev)
231 	kfree(gdev);
234 static int __ccwgroup_create_symlinks(struct ccwgroup_device *gdev)
239 	for (i = 0; i < gdev->count; i++) {
240 		rc = sysfs_create_link(&gdev->cdev[i]->dev.kobj,
241 				       &gdev->dev.kobj, "group_device");
244 				sysfs_remove_link(&gdev->cdev[i]->dev.kobj,
249 	for (i = 0; i < gdev->count; i++) {
251 		rc = sysfs_create_link(&gdev->dev.kobj,
252 				       &gdev->cdev[i]->dev.kobj, str);
256 				sysfs_remove_link(&gdev->dev.kobj, str);
258 			for (i = 0; i < gdev->count; i++)
259 				sysfs_remove_link(&gdev->cdev[i]->dev.kobj,
316 	struct ccwgroup_device *gdev;
323 	gdev = kzalloc(struct_size(gdev, cdev, num_devices), GFP_KERNEL);
324 	if (!gdev)
327 	atomic_set(&gdev->onoff, 0);
328 	mutex_init(&gdev->reg_mutex);
329 	mutex_lock(&gdev->reg_mutex);
330 	INIT_WORK(&gdev->ungroup_work, ccwgroup_ungroup_workfn);
331 	gdev->count = num_devices;
332 	gdev->dev.bus = &ccwgroup_bus_type;
333 	gdev->dev.parent = parent;
334 	gdev->dev.release = ccwgroup_release;
335 	device_initialize(&gdev->dev);
341 		gdev->cdev[i] = get_ccwdev_by_dev_id(&dev_id);
346 		if (!gdev->cdev[i] || !gdev->cdev[i]->drv ||
347 		    gdev->cdev[i]->drv != gdev->cdev[0]->drv ||
348 		    gdev->cdev[i]->id.driver_info !=
349 		    gdev->cdev[0]->id.driver_info) {
354 		spin_lock_irq(gdev->cdev[i]->ccwlock);
355 		if (dev_get_drvdata(&gdev->cdev[i]->dev)) {
356 			spin_unlock_irq(gdev->cdev[i]->ccwlock);
360 		dev_set_drvdata(&gdev->cdev[i]->dev, gdev);
361 		spin_unlock_irq(gdev->cdev[i]->ccwlock);
375 	    gdev->cdev[0]->drv != gdrv->ccw_driver) {
380 	dev_set_name(&gdev->dev, "%s", dev_name(&gdev->cdev[0]->dev));
383 		gdev->dev.driver = &gdrv->driver;
384 		rc = gdrv->setup ? gdrv->setup(gdev) : 0;
388 	rc = device_add(&gdev->dev);
391 	rc = __ccwgroup_create_symlinks(gdev);
393 		device_del(&gdev->dev);
396 	mutex_unlock(&gdev->reg_mutex);
399 	mutex_unlock(&gdev->reg_mutex);
400 	put_device(&gdev->dev);
408 	struct ccwgroup_device *gdev = to_ccwgroupdev(data);
411 		get_device(&gdev->dev);
412 		schedule_work(&gdev->ungroup_work);
450 	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
454 		gdrv->remove(gdev);
459 	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
465 		gdrv->shutdown(gdev);
533 	struct ccwgroup_device *gdev;
539 	gdev = dev_get_drvdata(&cdev->dev);
540 	if (!gdev) {
545 	get_device(&gdev->dev);
548 	ccwgroup_ungroup(gdev);
550 	put_device(&gdev->dev);