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()
261 	if (device == lcu->suc_data.device) {  in dasd_alias_disconnect_device_from_lcu()
262 		spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
263 		cancel_work_sync(&lcu->suc_data.worker);  in dasd_alias_disconnect_device_from_lcu()
264 		spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
265 		if (device == lcu->suc_data.device) {  in dasd_alias_disconnect_device_from_lcu()
267 			lcu->suc_data.device = NULL;  in dasd_alias_disconnect_device_from_lcu()
271 	if (device == lcu->ruac_data.device) {  in dasd_alias_disconnect_device_from_lcu()
272 		spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
274 		cancel_delayed_work_sync(&lcu->ruac_data.dwork);  in dasd_alias_disconnect_device_from_lcu()
275 		spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
276 		if (device == lcu->ruac_data.device) {  in dasd_alias_disconnect_device_from_lcu()
278 			lcu->ruac_data.device = NULL;  in dasd_alias_disconnect_device_from_lcu()
281 	private->lcu = NULL;  in dasd_alias_disconnect_device_from_lcu()
282 	spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_disconnect_device_from_lcu()
285 	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()
402 					   struct alias_lcu *lcu)  in read_unit_address_configuration()  argument
435 	memset(lcu->uac, 0, sizeof(*(lcu->uac)));  in read_unit_address_configuration()
439 	ccw->count = sizeof(*(lcu->uac));  in read_unit_address_configuration()
440 	ccw->cda = (__u32)(addr_t) lcu->uac;  in read_unit_address_configuration()
446 	spin_lock_irqsave(&lcu->lock, flags);  in read_unit_address_configuration()
447 	lcu->flags &= ~NEED_UAC_UPDATE;  in read_unit_address_configuration()
448 	spin_unlock_irqrestore(&lcu->lock, flags);  in read_unit_address_configuration()
456 		spin_lock_irqsave(&lcu->lock, flags);  in read_unit_address_configuration()
457 		lcu->flags |= NEED_UAC_UPDATE;  in read_unit_address_configuration()
458 		spin_unlock_irqrestore(&lcu->lock, flags);  in read_unit_address_configuration()
464 static int _lcu_update(struct dasd_device *refdev, struct alias_lcu *lcu)  in _lcu_update()  argument
472 	spin_lock_irqsave(&lcu->lock, flags);  in _lcu_update()
473 	list_for_each_entry_safe(pavgroup, tempgroup, &lcu->grouplist, group) {  in _lcu_update()
476 			list_move(&device->alias_list, &lcu->active_devices);  in _lcu_update()
482 			list_move(&device->alias_list, &lcu->active_devices);  in _lcu_update()
489 	spin_unlock_irqrestore(&lcu->lock, flags);  in _lcu_update()
491 	rc = read_unit_address_configuration(refdev, lcu);  in _lcu_update()
495 	spin_lock_irqsave(&lcu->lock, flags);  in _lcu_update()
496 	lcu->pav = NO_PAV;  in _lcu_update()
498 		switch (lcu->uac->unit[i].ua_type) {  in _lcu_update()
500 			lcu->pav = BASE_PAV;  in _lcu_update()
503 			lcu->pav = HYPER_PAV;  in _lcu_update()
506 		if (lcu->pav != NO_PAV)  in _lcu_update()
510 	list_for_each_entry_safe(device, tempdev, &lcu->active_devices,  in _lcu_update()
512 		_add_device_to_lcu(lcu, device, refdev);  in _lcu_update()
514 	spin_unlock_irqrestore(&lcu->lock, flags);  in _lcu_update()
520 	struct alias_lcu *lcu;  in lcu_update_work()  local
527 	lcu = container_of(ruac_data, struct alias_lcu, ruac_data);  in lcu_update_work()
529 	rc = _lcu_update(device, lcu);  in lcu_update_work()
535 	spin_lock_irqsave(&lcu->lock, flags);  in lcu_update_work()
536 	if ((rc && (rc != -EOPNOTSUPP)) || (lcu->flags & NEED_UAC_UPDATE)) {  in lcu_update_work()
539 		if (!schedule_delayed_work(&lcu->ruac_data.dwork, 30*HZ))  in lcu_update_work()
543 		lcu->ruac_data.device = NULL;  in lcu_update_work()
544 		lcu->flags &= ~UPDATE_PENDING;  in lcu_update_work()
546 	spin_unlock_irqrestore(&lcu->lock, flags);  in lcu_update_work()
549 static int _schedule_lcu_update(struct alias_lcu *lcu,  in _schedule_lcu_update()  argument
555 	lcu->flags |= NEED_UAC_UPDATE;  in _schedule_lcu_update()
556 	if (lcu->ruac_data.device) {  in _schedule_lcu_update()
563 	if (!usedev && !list_empty(&lcu->grouplist)) {  in _schedule_lcu_update()
564 		group = list_first_entry(&lcu->grouplist,  in _schedule_lcu_update()
575 	if (!usedev && !list_empty(&lcu->active_devices)) {  in _schedule_lcu_update()
576 		usedev = list_first_entry(&lcu->active_devices,  in _schedule_lcu_update()
586 	lcu->ruac_data.device = usedev;  in _schedule_lcu_update()
587 	if (!schedule_delayed_work(&lcu->ruac_data.dwork, 0))  in _schedule_lcu_update()
596 	struct alias_lcu *lcu = private->lcu;  in dasd_alias_add_device()  local
601 	spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_add_device()
606 	if (private->uid.type !=  lcu->uac->unit[uaddr].ua_type) {  in dasd_alias_add_device()
607 		lcu->flags |= UPDATE_PENDING;  in dasd_alias_add_device()
611 	if (!(lcu->flags & UPDATE_PENDING)) {  in dasd_alias_add_device()
612 		rc = _add_device_to_lcu(lcu, device, device);  in dasd_alias_add_device()
614 			lcu->flags |= UPDATE_PENDING;  in dasd_alias_add_device()
616 	if (lcu->flags & UPDATE_PENDING) {  in dasd_alias_add_device()
617 		list_move(&device->alias_list, &lcu->active_devices);  in dasd_alias_add_device()
618 		_schedule_lcu_update(lcu, device);  in dasd_alias_add_device()
620 	spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_add_device()
628 	private->lcu->flags |= UPDATE_PENDING;  in dasd_alias_update_add_device()
635 	struct alias_lcu *lcu = private->lcu;  in dasd_alias_remove_device()  local
639 	if (!lcu)  in dasd_alias_remove_device()
641 	spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_remove_device()
642 	_remove_device_from_lcu(lcu, device);  in dasd_alias_remove_device()
643 	spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_remove_device()
651 	struct alias_lcu *lcu = private->lcu;  in dasd_alias_get_start_dev()  local
655 	if (!group || !lcu)  in dasd_alias_get_start_dev()
657 	if (lcu->pav == NO_PAV ||  in dasd_alias_get_start_dev()
658 	    lcu->flags & (NEED_UAC_UPDATE | UPDATE_PENDING))  in dasd_alias_get_start_dev()
671 	spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_get_start_dev()
675 			spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_get_start_dev()
689 	spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_get_start_dev()
702 static int reset_summary_unit_check(struct alias_lcu *lcu,  in reset_summary_unit_check()  argument
710 	cqr = lcu->rsu_cqr;  in reset_summary_unit_check()
733 static void _restart_all_base_devices_on_lcu(struct alias_lcu *lcu)  in _restart_all_base_devices_on_lcu()  argument
740 	list_for_each_entry(device, &lcu->active_devices, alias_list) {  in _restart_all_base_devices_on_lcu()
747 	list_for_each_entry(device, &lcu->inactive_devices, alias_list) {  in _restart_all_base_devices_on_lcu()
754 	list_for_each_entry(pavgroup, &lcu->grouplist, group) {  in _restart_all_base_devices_on_lcu()
762 static void flush_all_alias_devices_on_lcu(struct alias_lcu *lcu)  in flush_all_alias_devices_on_lcu()  argument
781 	spin_lock_irqsave(&lcu->lock, flags);  in flush_all_alias_devices_on_lcu()
782 	list_for_each_entry_safe(device, temp, &lcu->active_devices,  in flush_all_alias_devices_on_lcu()
790 	list_for_each_entry(pavgroup, &lcu->grouplist, group) {  in flush_all_alias_devices_on_lcu()
796 		spin_unlock_irqrestore(&lcu->lock, flags);  in flush_all_alias_devices_on_lcu()
798 		spin_lock_irqsave(&lcu->lock, flags);  in flush_all_alias_devices_on_lcu()
805 			list_move(&device->alias_list, &lcu->active_devices);  in flush_all_alias_devices_on_lcu()
810 	spin_unlock_irqrestore(&lcu->lock, flags);  in flush_all_alias_devices_on_lcu()
813 static void _stop_all_devices_on_lcu(struct alias_lcu *lcu)  in _stop_all_devices_on_lcu()  argument
818 	list_for_each_entry(device, &lcu->active_devices, alias_list) {  in _stop_all_devices_on_lcu()
823 	list_for_each_entry(device, &lcu->inactive_devices, alias_list) {  in _stop_all_devices_on_lcu()
828 	list_for_each_entry(pavgroup, &lcu->grouplist, group) {  in _stop_all_devices_on_lcu()
842 static void _unstop_all_devices_on_lcu(struct alias_lcu *lcu)  in _unstop_all_devices_on_lcu()  argument
847 	list_for_each_entry(device, &lcu->active_devices, alias_list) {  in _unstop_all_devices_on_lcu()
852 	list_for_each_entry(device, &lcu->inactive_devices, alias_list) {  in _unstop_all_devices_on_lcu()
857 	list_for_each_entry(pavgroup, &lcu->grouplist, group) {  in _unstop_all_devices_on_lcu()
873 	struct alias_lcu *lcu;  in summary_unit_check_handling_work()  local
880 	lcu = container_of(suc_data, struct alias_lcu, suc_data);  in summary_unit_check_handling_work()
884 	flush_all_alias_devices_on_lcu(lcu);  in summary_unit_check_handling_work()
891 	reset_summary_unit_check(lcu, device, suc_data->reason);  in summary_unit_check_handling_work()
893 	spin_lock_irqsave(&lcu->lock, flags);  in summary_unit_check_handling_work()
894 	_unstop_all_devices_on_lcu(lcu);  in summary_unit_check_handling_work()
895 	_restart_all_base_devices_on_lcu(lcu);  in summary_unit_check_handling_work()
897 	_schedule_lcu_update(lcu, device);  in summary_unit_check_handling_work()
898 	lcu->suc_data.device = NULL;  in summary_unit_check_handling_work()
900 	spin_unlock_irqrestore(&lcu->lock, flags);  in summary_unit_check_handling_work()
908 	struct alias_lcu *lcu;  in dasd_alias_handle_summary_unit_check()  local
911 	lcu = private->lcu;  in dasd_alias_handle_summary_unit_check()
912 	if (!lcu) {  in dasd_alias_handle_summary_unit_check()
918 	spin_lock_irqsave(&lcu->lock, flags);  in dasd_alias_handle_summary_unit_check()
928 	if (lcu->suc_data.device) {  in dasd_alias_handle_summary_unit_check()
935 	_stop_all_devices_on_lcu(lcu);  in dasd_alias_handle_summary_unit_check()
937 	lcu->flags |= NEED_UAC_UPDATE | UPDATE_PENDING;  in dasd_alias_handle_summary_unit_check()
938 	lcu->suc_data.reason = private->suc_reason;  in dasd_alias_handle_summary_unit_check()
939 	lcu->suc_data.device = device;  in dasd_alias_handle_summary_unit_check()
941 	if (!schedule_work(&lcu->suc_data.worker))  in dasd_alias_handle_summary_unit_check()
944 	spin_unlock_irqrestore(&lcu->lock, flags);  in dasd_alias_handle_summary_unit_check()