69 	list_for_each_entry(pos, &server->lculist, lcu) {  in _find_lcu()
76 static struct alias_pav_group *_find_group(struct alias_lcu *lcu,  in _find_group()  argument
83 	if (lcu->pav == HYPER_PAV) {  in _find_group()
84 		if (list_empty(&lcu->grouplist))  in _find_group()
87 			return list_first_entry(&lcu->grouplist,  in _find_group()
96 	list_for_each_entry(pos, &lcu->grouplist, group) {  in _find_group()
125 	struct alias_lcu *lcu;  in _allocate_lcu()  local
127 	lcu = kzalloc(sizeof(*lcu), GFP_KERNEL);  in _allocate_lcu()
128 	if (!lcu)  in _allocate_lcu()
130 	lcu->uac = kzalloc(sizeof(*(lcu->uac)), GFP_KERNEL | GFP_DMA);  in _allocate_lcu()
131 	if (!lcu->uac)  in _allocate_lcu()
133 	lcu->rsu_cqr = kzalloc(sizeof(*lcu->rsu_cqr), GFP_KERNEL | GFP_DMA);  in _allocate_lcu()
134 	if (!lcu->rsu_cqr)  in _allocate_lcu()
136 	lcu->rsu_cqr->cpaddr = kzalloc(sizeof(struct ccw1),  in _allocate_lcu()
138 	if (!lcu->rsu_cqr->cpaddr)  in _allocate_lcu()
140 	lcu->rsu_cqr->data = kzalloc(16, GFP_KERNEL | GFP_DMA);  in _allocate_lcu()
141 	if (!lcu->rsu_cqr->data)  in _allocate_lcu()
144 	memcpy(lcu->uid.vendor, uid->vendor, sizeof(uid->vendor));  in _allocate_lcu()
145 	memcpy(lcu->uid.serial, uid->serial, sizeof(uid->serial));  in _allocate_lcu()
146 	lcu->uid.ssid = uid->ssid;  in _allocate_lcu()
147 	lcu->pav = NO_PAV;  in _allocate_lcu()
148 	lcu->flags = NEED_UAC_UPDATE | UPDATE_PENDING;  in _allocate_lcu()
149 	INIT_LIST_HEAD(&lcu->lcu);  in _allocate_lcu()
150 	INIT_LIST_HEAD(&lcu->inactive_devices);  in _allocate_lcu()
151 	INIT_LIST_HEAD(&lcu->active_devices);  in _allocate_lcu()
152 	INIT_LIST_HEAD(&lcu->grouplist);  in _allocate_lcu()
153 	INIT_WORK(&lcu->suc_data.worker, summary_unit_check_handling_work);  in _allocate_lcu()
154 	INIT_DELAYED_WORK(&lcu->ruac_data.dwork, lcu_update_work);  in _allocate_lcu()
155 	spin_lock_init(&lcu->lock);  in _allocate_lcu()
156 	init_completion(&lcu->lcu_setup);  in _allocate_lcu()
157 	return lcu;  in _allocate_lcu()
160 	kfree(lcu->rsu_cqr->cpaddr);  in _allocate_lcu()
162 	kfree(lcu->rsu_cqr);  in _allocate_lcu()
164 	kfree(lcu->uac);  in _allocate_lcu()
166 	kfree(lcu);  in _allocate_lcu()
170 static void _free_lcu(struct alias_lcu *lcu)  in _free_lcu()  argument
172 	kfree(lcu->rsu_cqr->data);  in _free_lcu()
173 	kfree(lcu->rsu_cqr->cpaddr);  in _free_lcu()
174 	kfree(lcu->rsu_cqr);  in _free_lcu()
175 	kfree(lcu->uac);  in _free_lcu()
176 	kfree(lcu);  in _free_lcu()
191 	struct alias_lcu *lcu, *newlcu;  in dasd_alias_make_device_known_to_lcu()  local
215 	lcu = _find_lcu(server, &uid);  in dasd_alias_make_device_known_to_lcu()
216 	if (!lcu) {  in dasd_alias_make_device_known_to_lcu()
222 		lcu = _find_lcu(server, &uid);  in dasd_alias_make_device_known_to_lcu()
223 		if (!lcu) {  in dasd_alias_make_device_known_to_lcu()
224 			list_add(&newlcu->lcu, &server->lculist);  in dasd_alias_make_device_known_to_lcu()
225 			lcu = newlcu;  in dasd_alias_make_device_known_to_lcu()
231 	spin_lock(&lcu->lock);  in dasd_alias_make_device_known_to_lcu()
232 	list_add(&device->alias_list, &lcu->inactive_devices);  in dasd_alias_make_device_known_to_lcu()
233 	private->lcu = lcu;  in dasd_alias_make_device_known_to_lcu()
234 	spin_unlock(&lcu->lock);  in dasd_alias_make_device_known_to_lcu()
249 	struct alias_lcu *lcu;  in dasd_alias_disconnect_device_from_lcu()  local
255 	lcu = private->lcu;  in dasd_alias_disconnect_device_from_lcu()
257 	if (!lcu)  in dasd_alias_disconnect_device_from_lcu()
260 	spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
263 	if (device == lcu->suc_data.device) {  in dasd_alias_disconnect_device_from_lcu()
264 		spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
265 		cancel_work_sync(&lcu->suc_data.worker);  in dasd_alias_disconnect_device_from_lcu()
266 		spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
267 		if (device == lcu->suc_data.device) {  in dasd_alias_disconnect_device_from_lcu()
269 			lcu->suc_data.device = NULL;  in dasd_alias_disconnect_device_from_lcu()
273 	if (device == lcu->ruac_data.device) {  in dasd_alias_disconnect_device_from_lcu()
274 		spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
276 		cancel_delayed_work_sync(&lcu->ruac_data.dwork);  in dasd_alias_disconnect_device_from_lcu()
277 		spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
278 		if (device == lcu->ruac_data.device) {  in dasd_alias_disconnect_device_from_lcu()
280 			lcu->ruac_data.device = NULL;  in dasd_alias_disconnect_device_from_lcu()
283 	private->lcu = NULL;  in dasd_alias_disconnect_device_from_lcu()
284 	spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
287 	spin_lock(&lcu->lock);  in dasd_alias_disconnect_device_from_lcu()
288 	if (list_empty(&lcu->grouplist) &&  in dasd_alias_disconnect_device_from_lcu()
289 	    list_empty(&lcu->active_devices) &&  in dasd_alias_disconnect_device_from_lcu()
290 	    list_empty(&lcu->inactive_devices)) {  in dasd_alias_disconnect_device_from_lcu()
291 		list_del(&lcu->lcu);  in dasd_alias_disconnect_device_from_lcu()
292 		spin_unlock(&lcu->lock);  in dasd_alias_disconnect_device_from_lcu()
293 		_free_lcu(lcu);  in dasd_alias_disconnect_device_from_lcu()
294 		lcu = NULL;  in dasd_alias_disconnect_device_from_lcu()
297 			_schedule_lcu_update(lcu, NULL);  in dasd_alias_disconnect_device_from_lcu()
298 		spin_unlock(&lcu->lock);  in dasd_alias_disconnect_device_from_lcu()
314 static int _add_device_to_lcu(struct alias_lcu *lcu,  in _add_device_to_lcu()  argument
330 	private->uid.type = lcu->uac->unit[private->uid.real_unit_addr].ua_type;  in _add_device_to_lcu()
332 		lcu->uac->unit[private->uid.real_unit_addr].base_ua;  in _add_device_to_lcu()
339 	if (lcu->pav == NO_PAV) {  in _add_device_to_lcu()
340 		list_move(&device->alias_list, &lcu->active_devices);  in _add_device_to_lcu()
344 	group = _find_group(lcu, &uid);  in _add_device_to_lcu()
360 		list_add(&group->group, &lcu->grouplist);  in _add_device_to_lcu()
370 static void _remove_device_from_lcu(struct alias_lcu *lcu,  in _remove_device_from_lcu()  argument
377 	list_move(&device->alias_list, &lcu->inactive_devices);  in _remove_device_from_lcu()
415 					   struct alias_lcu *lcu)  in read_unit_address_configuration()  argument
448 	memset(lcu->uac, 0, sizeof(*(lcu->uac)));  in read_unit_address_configuration()
452 	ccw->count = sizeof(*(lcu->uac));  in read_unit_address_configuration()
453 	ccw->cda = (__u32)(addr_t) lcu->uac;  in read_unit_address_configuration()
459 	spin_lock_irqsave(&lcu->lock, flags);  in read_unit_address_configuration()
460 	lcu->flags &= ~NEED_UAC_UPDATE;  in read_unit_address_configuration()
461 	spin_unlock_irqrestore(&lcu->lock, flags);  in read_unit_address_configuration()
469 		spin_lock_irqsave(&lcu->lock, flags);  in read_unit_address_configuration()
470 		lcu->flags |= NEED_UAC_UPDATE;  in read_unit_address_configuration()
471 		spin_unlock_irqrestore(&lcu->lock, flags);  in read_unit_address_configuration()
477 static int _lcu_update(struct dasd_device *refdev, struct alias_lcu *lcu)  in _lcu_update()  argument
485 	spin_lock_irqsave(&lcu->lock, flags);  in _lcu_update()
486 	list_for_each_entry_safe(pavgroup, tempgroup, &lcu->grouplist, group) {  in _lcu_update()
489 			list_move(&device->alias_list, &lcu->active_devices);  in _lcu_update()
495 			list_move(&device->alias_list, &lcu->active_devices);  in _lcu_update()
502 	spin_unlock_irqrestore(&lcu->lock, flags);  in _lcu_update()
504 	rc = read_unit_address_configuration(refdev, lcu);  in _lcu_update()
511 	spin_lock(&lcu->lock);  in _lcu_update()
512 	lcu->pav = NO_PAV;  in _lcu_update()
514 		switch (lcu->uac->unit[i].ua_type) {  in _lcu_update()
516 			lcu->pav = BASE_PAV;  in _lcu_update()
519 			lcu->pav = HYPER_PAV;  in _lcu_update()
522 		if (lcu->pav != NO_PAV)  in _lcu_update()
526 	list_for_each_entry_safe(device, tempdev, &lcu->active_devices,  in _lcu_update()
528 		_add_device_to_lcu(lcu, device, refdev);  in _lcu_update()
530 	spin_unlock(&lcu->lock);  in _lcu_update()
537 	struct alias_lcu *lcu;  in lcu_update_work()  local
544 	lcu = container_of(ruac_data, struct alias_lcu, ruac_data);  in lcu_update_work()
546 	rc = _lcu_update(device, lcu);  in lcu_update_work()
552 	spin_lock_irqsave(&lcu->lock, flags);  in lcu_update_work()
553 	if ((rc && (rc != -EOPNOTSUPP)) || (lcu->flags & NEED_UAC_UPDATE)) {  in lcu_update_work()
556 		if (!schedule_delayed_work(&lcu->ruac_data.dwork, 30*HZ))  in lcu_update_work()
560 		lcu->ruac_data.device = NULL;  in lcu_update_work()
561 		lcu->flags &= ~UPDATE_PENDING;  in lcu_update_work()
563 	spin_unlock_irqrestore(&lcu->lock, flags);  in lcu_update_work()
566 static int _schedule_lcu_update(struct alias_lcu *lcu,  in _schedule_lcu_update()  argument
572 	lcu->flags |= NEED_UAC_UPDATE;  in _schedule_lcu_update()
573 	if (lcu->ruac_data.device) {  in _schedule_lcu_update()
580 	if (!usedev && !list_empty(&lcu->grouplist)) {  in _schedule_lcu_update()
581 		group = list_first_entry(&lcu->grouplist,  in _schedule_lcu_update()
592 	if (!usedev && !list_empty(&lcu->active_devices)) {  in _schedule_lcu_update()
593 		usedev = list_first_entry(&lcu->active_devices,  in _schedule_lcu_update()
603 	lcu->ruac_data.device = usedev;  in _schedule_lcu_update()
604 	if (!schedule_delayed_work(&lcu->ruac_data.dwork, 0))  in _schedule_lcu_update()
612 	struct alias_lcu *lcu;  in dasd_alias_add_device()  local
617 	lcu = private->lcu;  in dasd_alias_add_device()
622 	spin_lock(&lcu->lock);  in dasd_alias_add_device()
623 	if (!(lcu->flags & UPDATE_PENDING)) {  in dasd_alias_add_device()
624 		rc = _add_device_to_lcu(lcu, device, device);  in dasd_alias_add_device()
626 			lcu->flags |= UPDATE_PENDING;  in dasd_alias_add_device()
628 	if (lcu->flags & UPDATE_PENDING) {  in dasd_alias_add_device()
629 		list_move(&device->alias_list, &lcu->active_devices);  in dasd_alias_add_device()
630 		_schedule_lcu_update(lcu, device);  in dasd_alias_add_device()
632 	spin_unlock(&lcu->lock);  in dasd_alias_add_device()
641 	private->lcu->flags |= UPDATE_PENDING;  in dasd_alias_update_add_device()
648 	struct alias_lcu *lcu;  in dasd_alias_remove_device()  local
652 	lcu = private->lcu;  in dasd_alias_remove_device()
654 	if (!lcu)  in dasd_alias_remove_device()
656 	spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_remove_device()
657 	_remove_device_from_lcu(lcu, device);  in dasd_alias_remove_device()
658 	spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_remove_device()
667 	struct alias_lcu *lcu;  in dasd_alias_get_start_dev()  local
673 	lcu = private->lcu;  in dasd_alias_get_start_dev()
674 	if (!group || !lcu)  in dasd_alias_get_start_dev()
676 	if (lcu->pav == NO_PAV ||  in dasd_alias_get_start_dev()
677 	    lcu->flags & (NEED_UAC_UPDATE | UPDATE_PENDING))  in dasd_alias_get_start_dev()
690 	spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_get_start_dev()
694 			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()
720 static int reset_summary_unit_check(struct alias_lcu *lcu,  in reset_summary_unit_check()  argument
728 	cqr = lcu->rsu_cqr;  in reset_summary_unit_check()
751 static void _restart_all_base_devices_on_lcu(struct alias_lcu *lcu)  in _restart_all_base_devices_on_lcu()  argument
759 	list_for_each_entry(device, &lcu->active_devices, alias_list) {  in _restart_all_base_devices_on_lcu()
771 	list_for_each_entry(device, &lcu->inactive_devices, alias_list) {  in _restart_all_base_devices_on_lcu()
783 	list_for_each_entry(pavgroup, &lcu->grouplist, group) {  in _restart_all_base_devices_on_lcu()
791 static void flush_all_alias_devices_on_lcu(struct alias_lcu *lcu)  in flush_all_alias_devices_on_lcu()  argument
811 	spin_lock_irqsave(&lcu->lock, flags);  in flush_all_alias_devices_on_lcu()
812 	list_for_each_entry_safe(device, temp, &lcu->active_devices,  in flush_all_alias_devices_on_lcu()
820 	list_for_each_entry(pavgroup, &lcu->grouplist, group) {  in flush_all_alias_devices_on_lcu()
826 		spin_unlock_irqrestore(&lcu->lock, flags);  in flush_all_alias_devices_on_lcu()
828 		spin_lock_irqsave(&lcu->lock, flags);  in flush_all_alias_devices_on_lcu()
835 			list_move(&device->alias_list, &lcu->active_devices);  in flush_all_alias_devices_on_lcu()
837 	spin_unlock_irqrestore(&lcu->lock, flags);  in flush_all_alias_devices_on_lcu()
857 static void _stop_all_devices_on_lcu(struct alias_lcu *lcu,  in _stop_all_devices_on_lcu()  argument
863 	list_for_each_entry(pos, &lcu->active_devices, alias_list)  in _stop_all_devices_on_lcu()
865 	list_for_each_entry(pos, &lcu->inactive_devices, alias_list)  in _stop_all_devices_on_lcu()
867 	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
881 	list_for_each_entry(device, &lcu->active_devices, alias_list) {  in _unstop_all_devices_on_lcu()
887 	list_for_each_entry(device, &lcu->inactive_devices, alias_list) {  in _unstop_all_devices_on_lcu()
893 	list_for_each_entry(pavgroup, &lcu->grouplist, group) {  in _unstop_all_devices_on_lcu()
911 	struct alias_lcu *lcu;  in summary_unit_check_handling_work()  local
918 	lcu = container_of(suc_data, struct alias_lcu, suc_data);  in summary_unit_check_handling_work()
922 	flush_all_alias_devices_on_lcu(lcu);  in summary_unit_check_handling_work()
929 	reset_summary_unit_check(lcu, device, suc_data->reason);  in summary_unit_check_handling_work()
931 	spin_lock_irqsave(&lcu->lock, flags);  in summary_unit_check_handling_work()
932 	_unstop_all_devices_on_lcu(lcu);  in summary_unit_check_handling_work()
933 	_restart_all_base_devices_on_lcu(lcu);  in summary_unit_check_handling_work()
935 	_schedule_lcu_update(lcu, device);  in summary_unit_check_handling_work()
936 	lcu->suc_data.device = NULL;  in summary_unit_check_handling_work()
938 	spin_unlock_irqrestore(&lcu->lock, flags);  in summary_unit_check_handling_work()
947 	struct alias_lcu *lcu;  in dasd_alias_handle_summary_unit_check()  local
966 	lcu = private->lcu;  in dasd_alias_handle_summary_unit_check()
967 	if (!lcu) {  in dasd_alias_handle_summary_unit_check()
973 	spin_lock(&lcu->lock);  in dasd_alias_handle_summary_unit_check()
974 	_stop_all_devices_on_lcu(lcu, device);  in dasd_alias_handle_summary_unit_check()
976 	private->lcu->flags |= NEED_UAC_UPDATE | UPDATE_PENDING;  in dasd_alias_handle_summary_unit_check()
984 		spin_unlock(&lcu->lock);  in dasd_alias_handle_summary_unit_check()
987 	if (lcu->suc_data.device) {  in dasd_alias_handle_summary_unit_check()
992 		spin_unlock(&lcu->lock);  in dasd_alias_handle_summary_unit_check()
995 	lcu->suc_data.reason = reason;  in dasd_alias_handle_summary_unit_check()
996 	lcu->suc_data.device = device;  in dasd_alias_handle_summary_unit_check()
998 	spin_unlock(&lcu->lock);  in dasd_alias_handle_summary_unit_check()
999 	if (!schedule_work(&lcu->suc_data.worker))  in dasd_alias_handle_summary_unit_check()