273 	struct subchannel *sch;  in ccw_device_set_offline()  local
287 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_set_offline()
308 		io_subchannel_quiesce(sch);  in ccw_device_set_offline()
540 	struct subchannel *sch;  in available_show()  local
550 		sch = to_subchannel(dev->parent);  in available_show()
551 		if (!sch->lpm)  in available_show()
565 	struct subchannel *sch = to_subchannel(dev);  in initiate_logging()  local
568 	rc = chsc_siosl(sch->schid);  in initiate_logging()
571 			sch->schid.ssid, sch->schid.sch_no, rc);  in initiate_logging()
575 		  sch->schid.ssid, sch->schid.sch_no);  in initiate_logging()
582 	struct subchannel *sch = to_subchannel(dev);  in vpm_show()  local
584 	return sprintf(buf, "%02x\n", sch->vpm);  in vpm_show()
678 static struct ccw_device * io_subchannel_allocate_dev(struct subchannel *sch)  in io_subchannel_allocate_dev()  argument
696 	cdev->dev.dma_mask = sch->dev.dma_mask;  in io_subchannel_allocate_dev()
697 	ret = dma_set_coherent_mask(&cdev->dev, sch->dev.coherent_dma_mask);  in io_subchannel_allocate_dev()
727 static int io_subchannel_initialize_dev(struct subchannel *sch,  in io_subchannel_initialize_dev()  argument
736 	priv->dev_id.devno = sch->schib.pmcw.dev;  in io_subchannel_initialize_dev()
737 	priv->dev_id.ssid = sch->schid.ssid;  in io_subchannel_initialize_dev()
745 	cdev->ccwlock = sch->lock;  in io_subchannel_initialize_dev()
746 	cdev->dev.parent = &sch->dev;  in io_subchannel_initialize_dev()
756 	if (!get_device(&sch->dev)) {  in io_subchannel_initialize_dev()
761 	spin_lock_irq(sch->lock);  in io_subchannel_initialize_dev()
762 	sch_set_cdev(sch, cdev);  in io_subchannel_initialize_dev()
763 	spin_unlock_irq(sch->lock);  in io_subchannel_initialize_dev()
772 static struct ccw_device * io_subchannel_create_ccwdev(struct subchannel *sch)  in io_subchannel_create_ccwdev()  argument
777 	cdev = io_subchannel_allocate_dev(sch);  in io_subchannel_create_ccwdev()
779 		ret = io_subchannel_initialize_dev(sch, cdev);  in io_subchannel_create_ccwdev()
788 static void sch_create_and_recog_new_device(struct subchannel *sch)  in sch_create_and_recog_new_device()  argument
793 	cdev = io_subchannel_create_ccwdev(sch);  in sch_create_and_recog_new_device()
796 		css_sch_device_unregister(sch);  in sch_create_and_recog_new_device()
800 	io_subchannel_recog(cdev, sch);  in sch_create_and_recog_new_device()
808 	struct subchannel *sch;  in io_subchannel_register()  local
812 	sch = to_subchannel(cdev->dev.parent);  in io_subchannel_register()
819 	if (!device_is_registered(&sch->dev))  in io_subchannel_register()
821 	css_update_ssd_info(sch);  in io_subchannel_register()
845 	if (dev_get_uevent_suppress(&sch->dev)) {  in io_subchannel_register()
846 		dev_set_uevent_suppress(&sch->dev, 0);  in io_subchannel_register()
847 		kobject_uevent(&sch->dev.kobj, KOBJ_ADD);  in io_subchannel_register()
855 		spin_lock_irqsave(sch->lock, flags);  in io_subchannel_register()
856 		sch_set_cdev(sch, NULL);  in io_subchannel_register()
857 		spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_register()
900 static void io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch)  in io_subchannel_recog()  argument
906 	spin_lock_irq(sch->lock);  in io_subchannel_recog()
908 	spin_unlock_irq(sch->lock);  in io_subchannel_recog()
912 				  struct subchannel *sch)  in ccw_device_move_to_sch()  argument
919 	if (!get_device(&sch->dev))  in ccw_device_move_to_sch()
931 			put_device(&sch->dev);  in ccw_device_move_to_sch()
936 	mutex_lock(&sch->reg_mutex);  in ccw_device_move_to_sch()
937 	rc = device_move(&cdev->dev, &sch->dev, DPM_ORDER_PARENT_BEFORE_DEV);  in ccw_device_move_to_sch()
938 	mutex_unlock(&sch->reg_mutex);  in ccw_device_move_to_sch()
942 			      cdev->private->dev_id.devno, sch->schid.ssid,  in ccw_device_move_to_sch()
943 			      sch->schib.pmcw.dev, rc);  in ccw_device_move_to_sch()
951 		put_device(&sch->dev);  in ccw_device_move_to_sch()
964 	spin_lock_irq(sch->lock);  in ccw_device_move_to_sch()
965 	cdev->ccwlock = sch->lock;  in ccw_device_move_to_sch()
966 	if (!sch_is_pseudo_sch(sch))  in ccw_device_move_to_sch()
967 		sch_set_cdev(sch, cdev);  in ccw_device_move_to_sch()
968 	spin_unlock_irq(sch->lock);  in ccw_device_move_to_sch()
969 	if (!sch_is_pseudo_sch(sch))  in ccw_device_move_to_sch()
970 		css_update_ssd_info(sch);  in ccw_device_move_to_sch()
976 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_move_to_orph()  local
977 	struct channel_subsystem *css = to_css(sch->dev.parent);  in ccw_device_move_to_orph()
982 static void io_subchannel_irq(struct subchannel *sch)  in io_subchannel_irq()  argument
986 	cdev = sch_get_cdev(sch);  in io_subchannel_irq()
989 	CIO_TRACE_EVENT(6, dev_name(&sch->dev));  in io_subchannel_irq()
996 void io_subchannel_init_config(struct subchannel *sch)  in io_subchannel_init_config()  argument
998 	memset(&sch->config, 0, sizeof(sch->config));  in io_subchannel_init_config()
999 	sch->config.csense = 1;  in io_subchannel_init_config()
1002 static void io_subchannel_init_fields(struct subchannel *sch)  in io_subchannel_init_fields()  argument
1004 	if (cio_is_console(sch->schid))  in io_subchannel_init_fields()
1005 		sch->opm = 0xff;  in io_subchannel_init_fields()
1007 		sch->opm = chp_get_sch_opm(sch);  in io_subchannel_init_fields()
1008 	sch->lpm = sch->schib.pmcw.pam & sch->opm;  in io_subchannel_init_fields()
1009 	sch->isc = cio_is_console(sch->schid) ? CONSOLE_ISC : IO_SCH_ISC;  in io_subchannel_init_fields()
1013 		      sch->schib.pmcw.dev, sch->schid.ssid,  in io_subchannel_init_fields()
1014 		      sch->schid.sch_no, sch->schib.pmcw.pim,  in io_subchannel_init_fields()
1015 		      sch->schib.pmcw.pam, sch->schib.pmcw.pom);  in io_subchannel_init_fields()
1017 	io_subchannel_init_config(sch);  in io_subchannel_init_fields()
1024 static int io_subchannel_probe(struct subchannel *sch)  in io_subchannel_probe()  argument
1030 	if (cio_is_console(sch->schid)) {  in io_subchannel_probe()
1031 		rc = sysfs_create_group(&sch->dev.kobj,  in io_subchannel_probe()
1037 				      sch->schid.ssid, sch->schid.sch_no, rc);  in io_subchannel_probe()
1043 		if (dev_get_uevent_suppress(&sch->dev)) {  in io_subchannel_probe()
1045 			dev_set_uevent_suppress(&sch->dev, 0);  in io_subchannel_probe()
1046 			kobject_uevent(&sch->dev.kobj, KOBJ_ADD);  in io_subchannel_probe()
1048 		cdev = sch_get_cdev(sch);  in io_subchannel_probe()
1059 	io_subchannel_init_fields(sch);  in io_subchannel_probe()
1060 	rc = cio_commit_config(sch);  in io_subchannel_probe()
1063 	rc = sysfs_create_group(&sch->dev.kobj,  in io_subchannel_probe()
1072 	io_priv->dma_area = dma_alloc_coherent(&sch->dev,  in io_subchannel_probe()
1080 	set_io_private(sch, io_priv);  in io_subchannel_probe()
1081 	css_schedule_eval(sch->schid);  in io_subchannel_probe()
1085 	spin_lock_irq(sch->lock);  in io_subchannel_probe()
1086 	css_sched_sch_todo(sch, SCH_TODO_UNREG);  in io_subchannel_probe()
1087 	spin_unlock_irq(sch->lock);  in io_subchannel_probe()
1091 static void io_subchannel_remove(struct subchannel *sch)  in io_subchannel_remove()  argument
1093 	struct io_subchannel_private *io_priv = to_io_private(sch);  in io_subchannel_remove()
1096 	cdev = sch_get_cdev(sch);  in io_subchannel_remove()
1101 	spin_lock_irq(sch->lock);  in io_subchannel_remove()
1102 	sch_set_cdev(sch, NULL);  in io_subchannel_remove()
1103 	set_io_private(sch, NULL);  in io_subchannel_remove()
1104 	spin_unlock_irq(sch->lock);  in io_subchannel_remove()
1106 	dma_free_coherent(&sch->dev, sizeof(*io_priv->dma_area),  in io_subchannel_remove()
1109 	sysfs_remove_group(&sch->dev.kobj, &io_subchannel_attr_group);  in io_subchannel_remove()
1112 static void io_subchannel_verify(struct subchannel *sch)  in io_subchannel_verify()  argument
1116 	cdev = sch_get_cdev(sch);  in io_subchannel_verify()
1121 static void io_subchannel_terminate_path(struct subchannel *sch, u8 mask)  in io_subchannel_terminate_path()  argument
1125 	cdev = sch_get_cdev(sch);  in io_subchannel_terminate_path()
1128 	if (cio_update_schib(sch))  in io_subchannel_terminate_path()
1131 	if (scsw_actl(&sch->schib.scsw) == 0 || sch->schib.pmcw.lpum != mask)  in io_subchannel_terminate_path()
1137 	if (cio_clear(sch))  in io_subchannel_terminate_path()
1148 static int io_subchannel_chp_event(struct subchannel *sch,  in io_subchannel_chp_event()  argument
1151 	struct ccw_device *cdev = sch_get_cdev(sch);  in io_subchannel_chp_event()
1155 	mask = chp_ssd_get_mask(&sch->ssd_info, link);  in io_subchannel_chp_event()
1160 		sch->opm &= ~mask;  in io_subchannel_chp_event()
1161 		sch->lpm &= ~mask;  in io_subchannel_chp_event()
1164 		io_subchannel_terminate_path(sch, mask);  in io_subchannel_chp_event()
1167 		sch->opm |= mask;  in io_subchannel_chp_event()
1168 		sch->lpm |= mask;  in io_subchannel_chp_event()
1171 		io_subchannel_verify(sch);  in io_subchannel_chp_event()
1174 		if (cio_update_schib(sch))  in io_subchannel_chp_event()
1178 		io_subchannel_terminate_path(sch, mask);  in io_subchannel_chp_event()
1181 		if (cio_update_schib(sch))  in io_subchannel_chp_event()
1183 		sch->lpm |= mask & sch->opm;  in io_subchannel_chp_event()
1186 		io_subchannel_verify(sch);  in io_subchannel_chp_event()
1204 static void io_subchannel_quiesce(struct subchannel *sch)  in io_subchannel_quiesce()  argument
1209 	spin_lock_irq(sch->lock);  in io_subchannel_quiesce()
1210 	cdev = sch_get_cdev(sch);  in io_subchannel_quiesce()
1211 	if (cio_is_console(sch->schid))  in io_subchannel_quiesce()
1213 	if (!sch->schib.pmcw.ena)  in io_subchannel_quiesce()
1215 	ret = cio_disable_subchannel(sch);  in io_subchannel_quiesce()
1226 			spin_unlock_irq(sch->lock);  in io_subchannel_quiesce()
1229 			spin_lock_irq(sch->lock);  in io_subchannel_quiesce()
1231 		ret = cio_disable_subchannel(sch);  in io_subchannel_quiesce()
1234 	spin_unlock_irq(sch->lock);  in io_subchannel_quiesce()
1237 static void io_subchannel_shutdown(struct subchannel *sch)  in io_subchannel_shutdown()  argument
1239 	io_subchannel_quiesce(sch);  in io_subchannel_shutdown()
1253 	struct subchannel *sch;  in recovery_check()  local
1259 		sch = to_subchannel(cdev->dev.parent);  in recovery_check()
1260 		if ((sch->schib.pmcw.pam & sch->opm) == sch->vpm)  in recovery_check()
1368 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_set_notoper()  local
1371 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));  in ccw_device_set_notoper()
1373 	cio_disable_subchannel(sch);  in ccw_device_set_notoper()
1389 static enum io_sch_action sch_get_action(struct subchannel *sch)  in sch_get_action()  argument
1393 	cdev = sch_get_cdev(sch);  in sch_get_action()
1394 	if (cio_update_schib(sch)) {  in sch_get_action()
1405 	if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {  in sch_get_action()
1410 	if ((sch->schib.pmcw.pam & sch->opm) == 0) {  in sch_get_action()
1434 static int io_subchannel_sch_event(struct subchannel *sch, int process)  in io_subchannel_sch_event()  argument
1442 	spin_lock_irqsave(sch->lock, flags);  in io_subchannel_sch_event()
1443 	if (!device_is_registered(&sch->dev))  in io_subchannel_sch_event()
1445 	if (work_pending(&sch->todo_work))  in io_subchannel_sch_event()
1447 	cdev = sch_get_cdev(sch);  in io_subchannel_sch_event()
1450 	action = sch_get_action(sch);  in io_subchannel_sch_event()
1452 		      sch->schid.ssid, sch->schid.sch_no, process,  in io_subchannel_sch_event()
1463 		io_subchannel_verify(sch);  in io_subchannel_sch_event()
1494 	spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_sch_event()
1508 		spin_lock_irqsave(sch->lock, flags);  in io_subchannel_sch_event()
1509 		sch_set_cdev(sch, NULL);  in io_subchannel_sch_event()
1510 		spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_sch_event()
1521 		css_sch_device_unregister(sch);  in io_subchannel_sch_event()
1526 		dev_id.ssid = sch->schid.ssid;  in io_subchannel_sch_event()
1527 		dev_id.devno = sch->schib.pmcw.dev;  in io_subchannel_sch_event()
1530 			sch_create_and_recog_new_device(sch);  in io_subchannel_sch_event()
1533 		rc = ccw_device_move_to_sch(cdev, sch);  in io_subchannel_sch_event()
1539 		spin_lock_irqsave(sch->lock, flags);  in io_subchannel_sch_event()
1541 		spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_sch_event()
1551 	spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_sch_event()
1571 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_enable_console()  local
1577 	io_subchannel_init_fields(sch);  in ccw_device_enable_console()
1578 	rc = cio_commit_config(sch);  in ccw_device_enable_console()
1581 	sch->driver = &io_subchannel_driver;  in ccw_device_enable_console()
1582 	io_subchannel_recog(cdev, sch);  in ccw_device_enable_console()
1612 	struct subchannel *sch;  in ccw_device_create_console()  local
1614 	sch = cio_probe_console();  in ccw_device_create_console()
1615 	if (IS_ERR(sch))  in ccw_device_create_console()
1616 		return ERR_CAST(sch);  in ccw_device_create_console()
1621 	io_priv->dma_area = dma_alloc_coherent(&sch->dev,  in ccw_device_create_console()
1626 	set_io_private(sch, io_priv);  in ccw_device_create_console()
1627 	cdev = io_subchannel_create_ccwdev(sch);  in ccw_device_create_console()
1629 		dma_free_coherent(&sch->dev, sizeof(*io_priv->dma_area),  in ccw_device_create_console()
1631 		set_io_private(sch, NULL);  in ccw_device_create_console()
1632 		put_device(&sch->dev);  in ccw_device_create_console()
1643 	put_device(&sch->dev);  in ccw_device_create_console()
1649 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_destroy_console()  local
1650 	struct io_subchannel_private *io_priv = to_io_private(sch);  in ccw_device_destroy_console()
1652 	set_io_private(sch, NULL);  in ccw_device_destroy_console()
1653 	dma_free_coherent(&sch->dev, sizeof(*io_priv->dma_area),  in ccw_device_destroy_console()
1655 	put_device(&sch->dev);  in ccw_device_destroy_console()
1670 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_wait_idle()  local
1673 		cio_tsch(sch);  in ccw_device_wait_idle()
1674 		if (sch->schib.scsw.cmd.actl == 0)  in ccw_device_wait_idle()
1735 	struct subchannel *sch;  in ccw_device_remove()  local
1761 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_remove()
1763 	io_subchannel_quiesce(sch);  in ccw_device_remove()
1818 	struct subchannel *sch;  in ccw_device_todo()  local
1823 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_todo()
1843 		if (!sch_is_pseudo_sch(sch))  in ccw_device_todo()
1844 			css_schedule_eval(sch->schid);  in ccw_device_todo()
1847 		spin_lock_irq(sch->lock);  in ccw_device_todo()
1848 		sch_set_cdev(sch, NULL);  in ccw_device_todo()
1849 		spin_unlock_irq(sch->lock);  in ccw_device_todo()
1894 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_siosl()  local
1896 	return chsc_siosl(sch->schid);  in ccw_device_siosl()