70 	list_for_each_entry(pos, &server->lculist, lcu) {  in _find_lcu()
77 static struct alias_pav_group *_find_group(struct alias_lcu *lcu,  in _find_group()  argument
84 	if (lcu->pav == HYPER_PAV) {  in _find_group()
85 		if (list_empty(&lcu->grouplist))  in _find_group()
88 			return list_first_entry(&lcu->grouplist,  in _find_group()
97 	list_for_each_entry(pos, &lcu->grouplist, group) {  in _find_group()
126 	struct alias_lcu *lcu;  in _allocate_lcu()  local
128 	lcu = kzalloc(sizeof(*lcu), GFP_KERNEL);  in _allocate_lcu()
129 	if (!lcu)  in _allocate_lcu()
131 	lcu->uac = kzalloc(sizeof(*(lcu->uac)), GFP_KERNEL | GFP_DMA);  in _allocate_lcu()
132 	if (!lcu->uac)  in _allocate_lcu()
134 	lcu->rsu_cqr = kzalloc(sizeof(*lcu->rsu_cqr), GFP_KERNEL | GFP_DMA);  in _allocate_lcu()
135 	if (!lcu->rsu_cqr)  in _allocate_lcu()
137 	lcu->rsu_cqr->cpaddr = kzalloc(sizeof(struct ccw1),  in _allocate_lcu()
139 	if (!lcu->rsu_cqr->cpaddr)  in _allocate_lcu()
141 	lcu->rsu_cqr->data = kzalloc(16, GFP_KERNEL | GFP_DMA);  in _allocate_lcu()
142 	if (!lcu->rsu_cqr->data)  in _allocate_lcu()
145 	memcpy(lcu->uid.vendor, uid->vendor, sizeof(uid->vendor));  in _allocate_lcu()
146 	memcpy(lcu->uid.serial, uid->serial, sizeof(uid->serial));  in _allocate_lcu()
147 	lcu->uid.ssid = uid->ssid;  in _allocate_lcu()
148 	lcu->pav = NO_PAV;  in _allocate_lcu()
149 	lcu->flags = NEED_UAC_UPDATE | UPDATE_PENDING;  in _allocate_lcu()
150 	INIT_LIST_HEAD(&lcu->lcu);  in _allocate_lcu()
151 	INIT_LIST_HEAD(&lcu->inactive_devices);  in _allocate_lcu()
152 	INIT_LIST_HEAD(&lcu->active_devices);  in _allocate_lcu()
153 	INIT_LIST_HEAD(&lcu->grouplist);  in _allocate_lcu()
154 	INIT_WORK(&lcu->suc_data.worker, summary_unit_check_handling_work);  in _allocate_lcu()
155 	INIT_DELAYED_WORK(&lcu->ruac_data.dwork, lcu_update_work);  in _allocate_lcu()
156 	spin_lock_init(&lcu->lock);  in _allocate_lcu()
157 	init_completion(&lcu->lcu_setup);  in _allocate_lcu()
158 	return lcu;  in _allocate_lcu()
161 	kfree(lcu->rsu_cqr->cpaddr);  in _allocate_lcu()
163 	kfree(lcu->rsu_cqr);  in _allocate_lcu()
165 	kfree(lcu->uac);  in _allocate_lcu()
167 	kfree(lcu);  in _allocate_lcu()
171 static void _free_lcu(struct alias_lcu *lcu)  in _free_lcu()  argument
173 	kfree(lcu->rsu_cqr->data);  in _free_lcu()
174 	kfree(lcu->rsu_cqr->cpaddr);  in _free_lcu()
175 	kfree(lcu->rsu_cqr);  in _free_lcu()
176 	kfree(lcu->uac);  in _free_lcu()
177 	kfree(lcu);  in _free_lcu()
192 	struct alias_lcu *lcu, *newlcu;  in dasd_alias_make_device_known_to_lcu()  local
214 	lcu = _find_lcu(server, &uid);  in dasd_alias_make_device_known_to_lcu()
215 	if (!lcu) {  in dasd_alias_make_device_known_to_lcu()
221 		lcu = _find_lcu(server, &uid);  in dasd_alias_make_device_known_to_lcu()
222 		if (!lcu) {  in dasd_alias_make_device_known_to_lcu()
223 			list_add(&newlcu->lcu, &server->lculist);  in dasd_alias_make_device_known_to_lcu()
224 			lcu = newlcu;  in dasd_alias_make_device_known_to_lcu()
230 	spin_lock(&lcu->lock);  in dasd_alias_make_device_known_to_lcu()
231 	list_add(&device->alias_list, &lcu->inactive_devices);  in dasd_alias_make_device_known_to_lcu()
232 	private->lcu = lcu;  in dasd_alias_make_device_known_to_lcu()
233 	spin_unlock(&lcu->lock);  in dasd_alias_make_device_known_to_lcu()
248 	struct alias_lcu *lcu;  in dasd_alias_disconnect_device_from_lcu()  local
253 	lcu = private->lcu;  in dasd_alias_disconnect_device_from_lcu()
255 	if (!lcu)  in dasd_alias_disconnect_device_from_lcu()
258 	spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
260 	if (device == lcu->suc_data.device) {  in dasd_alias_disconnect_device_from_lcu()
261 		spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
262 		cancel_work_sync(&lcu->suc_data.worker);  in dasd_alias_disconnect_device_from_lcu()
263 		spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
264 		if (device == lcu->suc_data.device) {  in dasd_alias_disconnect_device_from_lcu()
266 			lcu->suc_data.device = NULL;  in dasd_alias_disconnect_device_from_lcu()
270 	if (device == lcu->ruac_data.device) {  in dasd_alias_disconnect_device_from_lcu()
271 		spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
273 		cancel_delayed_work_sync(&lcu->ruac_data.dwork);  in dasd_alias_disconnect_device_from_lcu()
274 		spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
275 		if (device == lcu->ruac_data.device) {  in dasd_alias_disconnect_device_from_lcu()
277 			lcu->ruac_data.device = NULL;  in dasd_alias_disconnect_device_from_lcu()
280 	private->lcu = NULL;  in dasd_alias_disconnect_device_from_lcu()
281 	spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
284 	spin_lock(&lcu->lock);  in dasd_alias_disconnect_device_from_lcu()
286 	if (list_empty(&lcu->grouplist) &&  in dasd_alias_disconnect_device_from_lcu()
287 	    list_empty(&lcu->active_devices) &&  in dasd_alias_disconnect_device_from_lcu()
288 	    list_empty(&lcu->inactive_devices)) {  in dasd_alias_disconnect_device_from_lcu()
289 		list_del(&lcu->lcu);  in dasd_alias_disconnect_device_from_lcu()
290 		spin_unlock(&lcu->lock);  in dasd_alias_disconnect_device_from_lcu()
291 		_free_lcu(lcu);  in dasd_alias_disconnect_device_from_lcu()
292 		lcu = NULL;  in dasd_alias_disconnect_device_from_lcu()
295 			_schedule_lcu_update(lcu, NULL);  in dasd_alias_disconnect_device_from_lcu()
296 		spin_unlock(&lcu->lock);  in dasd_alias_disconnect_device_from_lcu()
312 static int _add_device_to_lcu(struct alias_lcu *lcu,  in _add_device_to_lcu()  argument
322 	private->uid.type = lcu->uac->unit[private->uid.real_unit_addr].ua_type;  in _add_device_to_lcu()
324 		lcu->uac->unit[private->uid.real_unit_addr].base_ua;  in _add_device_to_lcu()
328 	if (lcu->pav == NO_PAV) {  in _add_device_to_lcu()
329 		list_move(&device->alias_list, &lcu->active_devices);  in _add_device_to_lcu()
332 	group = _find_group(lcu, &uid);  in _add_device_to_lcu()
348 		list_add(&group->group, &lcu->grouplist);  in _add_device_to_lcu()
358 static void _remove_device_from_lcu(struct alias_lcu *lcu,  in _remove_device_from_lcu()  argument
364 	list_move(&device->alias_list, &lcu->inactive_devices);  in _remove_device_from_lcu()
416 					   struct alias_lcu *lcu)  in read_unit_address_configuration()  argument
449 	memset(lcu->uac, 0, sizeof(*(lcu->uac)));  in read_unit_address_configuration()
453 	ccw->count = sizeof(*(lcu->uac));  in read_unit_address_configuration()
454 	ccw->cda = (__u32)(addr_t) lcu->uac;  in read_unit_address_configuration()
460 	spin_lock_irqsave(&lcu->lock, flags);  in read_unit_address_configuration()
461 	lcu->flags &= ~NEED_UAC_UPDATE;  in read_unit_address_configuration()
462 	spin_unlock_irqrestore(&lcu->lock, flags);  in read_unit_address_configuration()
473 		spin_lock_irqsave(&lcu->lock, flags);  in read_unit_address_configuration()
474 		lcu->flags |= NEED_UAC_UPDATE;  in read_unit_address_configuration()
475 		spin_unlock_irqrestore(&lcu->lock, flags);  in read_unit_address_configuration()
482 static int _lcu_update(struct dasd_device *refdev, struct alias_lcu *lcu)  in _lcu_update()  argument
490 	spin_lock_irqsave(&lcu->lock, flags);  in _lcu_update()
491 	list_for_each_entry_safe(pavgroup, tempgroup, &lcu->grouplist, group) {  in _lcu_update()
494 			list_move(&device->alias_list, &lcu->active_devices);  in _lcu_update()
500 			list_move(&device->alias_list, &lcu->active_devices);  in _lcu_update()
507 	spin_unlock_irqrestore(&lcu->lock, flags);  in _lcu_update()
509 	rc = read_unit_address_configuration(refdev, lcu);  in _lcu_update()
513 	spin_lock_irqsave(&lcu->lock, flags);  in _lcu_update()
520 	if (lcu->flags & NEED_UAC_UPDATE)  in _lcu_update()
522 	lcu->pav = NO_PAV;  in _lcu_update()
524 		switch (lcu->uac->unit[i].ua_type) {  in _lcu_update()
526 			lcu->pav = BASE_PAV;  in _lcu_update()
529 			lcu->pav = HYPER_PAV;  in _lcu_update()
532 		if (lcu->pav != NO_PAV)  in _lcu_update()
536 	list_for_each_entry_safe(device, tempdev, &lcu->active_devices,  in _lcu_update()
538 		_add_device_to_lcu(lcu, device, refdev);  in _lcu_update()
541 	spin_unlock_irqrestore(&lcu->lock, flags);  in _lcu_update()
547 	struct alias_lcu *lcu;  in lcu_update_work()  local
554 	lcu = container_of(ruac_data, struct alias_lcu, ruac_data);  in lcu_update_work()
556 	rc = _lcu_update(device, lcu);  in lcu_update_work()
562 	spin_lock_irqsave(&lcu->lock, flags);  in lcu_update_work()
563 	if ((rc && (rc != -EOPNOTSUPP)) || (lcu->flags & NEED_UAC_UPDATE)) {  in lcu_update_work()
566 		if (!schedule_delayed_work(&lcu->ruac_data.dwork, 30*HZ))  in lcu_update_work()
570 		lcu->ruac_data.device = NULL;  in lcu_update_work()
571 		lcu->flags &= ~UPDATE_PENDING;  in lcu_update_work()
573 	spin_unlock_irqrestore(&lcu->lock, flags);  in lcu_update_work()
576 static int _schedule_lcu_update(struct alias_lcu *lcu,  in _schedule_lcu_update()  argument
582 	lcu->flags |= NEED_UAC_UPDATE;  in _schedule_lcu_update()
583 	if (lcu->ruac_data.device) {  in _schedule_lcu_update()
590 	if (!usedev && !list_empty(&lcu->grouplist)) {  in _schedule_lcu_update()
591 		group = list_first_entry(&lcu->grouplist,  in _schedule_lcu_update()
602 	if (!usedev && !list_empty(&lcu->active_devices)) {  in _schedule_lcu_update()
603 		usedev = list_first_entry(&lcu->active_devices,  in _schedule_lcu_update()
613 	lcu->ruac_data.device = usedev;  in _schedule_lcu_update()
614 	if (!schedule_delayed_work(&lcu->ruac_data.dwork, 0))  in _schedule_lcu_update()
623 	struct alias_lcu *lcu = private->lcu;  in dasd_alias_add_device()  local
628 	spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_add_device()
633 	if (private->uid.type !=  lcu->uac->unit[uaddr].ua_type) {  in dasd_alias_add_device()
634 		lcu->flags |= UPDATE_PENDING;  in dasd_alias_add_device()
638 	if (!(lcu->flags & UPDATE_PENDING)) {  in dasd_alias_add_device()
639 		rc = _add_device_to_lcu(lcu, device, device);  in dasd_alias_add_device()
641 			lcu->flags |= UPDATE_PENDING;  in dasd_alias_add_device()
643 	if (lcu->flags & UPDATE_PENDING) {  in dasd_alias_add_device()
644 		list_move(&device->alias_list, &lcu->active_devices);  in dasd_alias_add_device()
646 		_schedule_lcu_update(lcu, device);  in dasd_alias_add_device()
648 	spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_add_device()
656 	private->lcu->flags |= UPDATE_PENDING;  in dasd_alias_update_add_device()
663 	struct alias_lcu *lcu = private->lcu;  in dasd_alias_remove_device()  local
667 	if (!lcu)  in dasd_alias_remove_device()
669 	spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_remove_device()
670 	_remove_device_from_lcu(lcu, device);  in dasd_alias_remove_device()
671 	spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_remove_device()
678 	struct alias_lcu *lcu = private->lcu;  in dasd_alias_get_start_dev()  local
683 	if (!lcu)  in dasd_alias_get_start_dev()
685 	if (lcu->pav == NO_PAV ||  in dasd_alias_get_start_dev()
686 	    lcu->flags & (NEED_UAC_UPDATE | UPDATE_PENDING))  in dasd_alias_get_start_dev()
699 	spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_get_start_dev()
702 		spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_get_start_dev()
708 			spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_get_start_dev()
722 	spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_get_start_dev()
735 static int reset_summary_unit_check(struct alias_lcu *lcu,  in reset_summary_unit_check()  argument
743 	cqr = lcu->rsu_cqr;  in reset_summary_unit_check()
766 static void _restart_all_base_devices_on_lcu(struct alias_lcu *lcu)  in _restart_all_base_devices_on_lcu()  argument
773 	list_for_each_entry(device, &lcu->active_devices, alias_list) {  in _restart_all_base_devices_on_lcu()
780 	list_for_each_entry(device, &lcu->inactive_devices, alias_list) {  in _restart_all_base_devices_on_lcu()
787 	list_for_each_entry(pavgroup, &lcu->grouplist, group) {  in _restart_all_base_devices_on_lcu()
795 static void flush_all_alias_devices_on_lcu(struct alias_lcu *lcu)  in flush_all_alias_devices_on_lcu()  argument
814 	spin_lock_irqsave(&lcu->lock, flags);  in flush_all_alias_devices_on_lcu()
815 	list_for_each_entry_safe(device, temp, &lcu->active_devices,  in flush_all_alias_devices_on_lcu()
823 	list_for_each_entry(pavgroup, &lcu->grouplist, group) {  in flush_all_alias_devices_on_lcu()
829 		spin_unlock_irqrestore(&lcu->lock, flags);  in flush_all_alias_devices_on_lcu()
831 		spin_lock_irqsave(&lcu->lock, flags);  in flush_all_alias_devices_on_lcu()
838 			list_move(&device->alias_list, &lcu->active_devices);  in flush_all_alias_devices_on_lcu()
843 	spin_unlock_irqrestore(&lcu->lock, flags);  in flush_all_alias_devices_on_lcu()
846 static void _stop_all_devices_on_lcu(struct alias_lcu *lcu)  in _stop_all_devices_on_lcu()  argument
851 	list_for_each_entry(device, &lcu->active_devices, alias_list) {  in _stop_all_devices_on_lcu()
856 	list_for_each_entry(device, &lcu->inactive_devices, alias_list) {  in _stop_all_devices_on_lcu()
861 	list_for_each_entry(pavgroup, &lcu->grouplist, group) {  in _stop_all_devices_on_lcu()
875 static void _unstop_all_devices_on_lcu(struct alias_lcu *lcu)  in _unstop_all_devices_on_lcu()  argument
880 	list_for_each_entry(device, &lcu->active_devices, alias_list) {  in _unstop_all_devices_on_lcu()
885 	list_for_each_entry(device, &lcu->inactive_devices, alias_list) {  in _unstop_all_devices_on_lcu()
890 	list_for_each_entry(pavgroup, &lcu->grouplist, group) {  in _unstop_all_devices_on_lcu()
906 	struct alias_lcu *lcu;  in summary_unit_check_handling_work()  local
913 	lcu = container_of(suc_data, struct alias_lcu, suc_data);  in summary_unit_check_handling_work()
917 	flush_all_alias_devices_on_lcu(lcu);  in summary_unit_check_handling_work()
924 	reset_summary_unit_check(lcu, device, suc_data->reason);  in summary_unit_check_handling_work()
926 	spin_lock_irqsave(&lcu->lock, flags);  in summary_unit_check_handling_work()
927 	_unstop_all_devices_on_lcu(lcu);  in summary_unit_check_handling_work()
928 	_restart_all_base_devices_on_lcu(lcu);  in summary_unit_check_handling_work()
930 	_schedule_lcu_update(lcu, device);  in summary_unit_check_handling_work()
931 	lcu->suc_data.device = NULL;  in summary_unit_check_handling_work()
933 	spin_unlock_irqrestore(&lcu->lock, flags);  in summary_unit_check_handling_work()
941 	struct alias_lcu *lcu;  in dasd_alias_handle_summary_unit_check()  local
944 	lcu = private->lcu;  in dasd_alias_handle_summary_unit_check()
945 	if (!lcu) {  in dasd_alias_handle_summary_unit_check()
951 	spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_handle_summary_unit_check()
961 	if (lcu->suc_data.device) {  in dasd_alias_handle_summary_unit_check()
968 	_stop_all_devices_on_lcu(lcu);  in dasd_alias_handle_summary_unit_check()
970 	lcu->flags |= NEED_UAC_UPDATE | UPDATE_PENDING;  in dasd_alias_handle_summary_unit_check()
971 	lcu->suc_data.reason = private->suc_reason;  in dasd_alias_handle_summary_unit_check()
972 	lcu->suc_data.device = device;  in dasd_alias_handle_summary_unit_check()
974 	if (!schedule_work(&lcu->suc_data.worker))  in dasd_alias_handle_summary_unit_check()
977 	spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_handle_summary_unit_check()