151 static int io_subchannel_prepare(struct subchannel *sch)  in io_subchannel_prepare()  argument
158 	cdev = sch_get_cdev(sch);  in io_subchannel_prepare()
286 	struct subchannel *sch;  in ccw_device_set_offline()  local
300 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_set_offline()
321 		io_subchannel_quiesce(sch);  in ccw_device_set_offline()
553 	struct subchannel *sch;  in available_show()  local
563 		sch = to_subchannel(dev->parent);  in available_show()
564 		if (!sch->lpm)  in available_show()
578 	struct subchannel *sch = to_subchannel(dev);  in initiate_logging()  local
581 	rc = chsc_siosl(sch->schid);  in initiate_logging()
584 			sch->schid.ssid, sch->schid.sch_no, rc);  in initiate_logging()
588 		  sch->schid.ssid, sch->schid.sch_no);  in initiate_logging()
595 	struct subchannel *sch = to_subchannel(dev);  in vpm_show()  local
597 	return sprintf(buf, "%02x\n", sch->vpm);  in vpm_show()
696 static struct ccw_device * io_subchannel_allocate_dev(struct subchannel *sch)  in io_subchannel_allocate_dev()  argument
713 static int io_subchannel_initialize_dev(struct subchannel *sch,  in io_subchannel_initialize_dev()  argument
722 	priv->dev_id.devno = sch->schib.pmcw.dev;  in io_subchannel_initialize_dev()
723 	priv->dev_id.ssid = sch->schid.ssid;  in io_subchannel_initialize_dev()
731 	cdev->ccwlock = sch->lock;  in io_subchannel_initialize_dev()
732 	cdev->dev.parent = &sch->dev;  in io_subchannel_initialize_dev()
741 	if (!get_device(&sch->dev)) {  in io_subchannel_initialize_dev()
746 	spin_lock_irq(sch->lock);  in io_subchannel_initialize_dev()
747 	sch_set_cdev(sch, cdev);  in io_subchannel_initialize_dev()
748 	spin_unlock_irq(sch->lock);  in io_subchannel_initialize_dev()
757 static struct ccw_device * io_subchannel_create_ccwdev(struct subchannel *sch)  in io_subchannel_create_ccwdev()  argument
762 	cdev = io_subchannel_allocate_dev(sch);  in io_subchannel_create_ccwdev()
764 		ret = io_subchannel_initialize_dev(sch, cdev);  in io_subchannel_create_ccwdev()
773 static void sch_create_and_recog_new_device(struct subchannel *sch)  in sch_create_and_recog_new_device()  argument
778 	cdev = io_subchannel_create_ccwdev(sch);  in sch_create_and_recog_new_device()
781 		css_sch_device_unregister(sch);  in sch_create_and_recog_new_device()
785 	io_subchannel_recog(cdev, sch);  in sch_create_and_recog_new_device()
793 	struct subchannel *sch;  in io_subchannel_register()  local
797 	sch = to_subchannel(cdev->dev.parent);  in io_subchannel_register()
804 	if (!device_is_registered(&sch->dev))  in io_subchannel_register()
806 	css_update_ssd_info(sch);  in io_subchannel_register()
830 	dev_set_uevent_suppress(&sch->dev, 0);  in io_subchannel_register()
831 	kobject_uevent(&sch->dev.kobj, KOBJ_ADD);  in io_subchannel_register()
838 		spin_lock_irqsave(sch->lock, flags);  in io_subchannel_register()
839 		sch_set_cdev(sch, NULL);  in io_subchannel_register()
840 		spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_register()
855 	struct subchannel *sch;  in ccw_device_call_sch_unregister()  local
860 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_call_sch_unregister()
861 	css_sch_device_unregister(sch);  in ccw_device_call_sch_unregister()
863 	put_device(&sch->dev);  in ccw_device_call_sch_unregister()
896 static void io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch)  in io_subchannel_recog()  argument
902 	spin_lock_irq(sch->lock);  in io_subchannel_recog()
904 	spin_unlock_irq(sch->lock);  in io_subchannel_recog()
908 				  struct subchannel *sch)  in ccw_device_move_to_sch()  argument
915 	if (!get_device(&sch->dev))  in ccw_device_move_to_sch()
927 			put_device(&sch->dev);  in ccw_device_move_to_sch()
932 	mutex_lock(&sch->reg_mutex);  in ccw_device_move_to_sch()
933 	rc = device_move(&cdev->dev, &sch->dev, DPM_ORDER_PARENT_BEFORE_DEV);  in ccw_device_move_to_sch()
934 	mutex_unlock(&sch->reg_mutex);  in ccw_device_move_to_sch()
938 			      cdev->private->dev_id.devno, sch->schid.ssid,  in ccw_device_move_to_sch()
939 			      sch->schib.pmcw.dev, rc);  in ccw_device_move_to_sch()
947 		put_device(&sch->dev);  in ccw_device_move_to_sch()
960 	spin_lock_irq(sch->lock);  in ccw_device_move_to_sch()
961 	cdev->ccwlock = sch->lock;  in ccw_device_move_to_sch()
962 	if (!sch_is_pseudo_sch(sch))  in ccw_device_move_to_sch()
963 		sch_set_cdev(sch, cdev);  in ccw_device_move_to_sch()
964 	spin_unlock_irq(sch->lock);  in ccw_device_move_to_sch()
965 	if (!sch_is_pseudo_sch(sch))  in ccw_device_move_to_sch()
966 		css_update_ssd_info(sch);  in ccw_device_move_to_sch()
972 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_move_to_orph()  local
973 	struct channel_subsystem *css = to_css(sch->dev.parent);  in ccw_device_move_to_orph()
978 static void io_subchannel_irq(struct subchannel *sch)  in io_subchannel_irq()  argument
982 	cdev = sch_get_cdev(sch);  in io_subchannel_irq()
985 	CIO_TRACE_EVENT(6, dev_name(&sch->dev));  in io_subchannel_irq()
992 void io_subchannel_init_config(struct subchannel *sch)  in io_subchannel_init_config()  argument
994 	memset(&sch->config, 0, sizeof(sch->config));  in io_subchannel_init_config()
995 	sch->config.csense = 1;  in io_subchannel_init_config()
998 static void io_subchannel_init_fields(struct subchannel *sch)  in io_subchannel_init_fields()  argument
1000 	if (cio_is_console(sch->schid))  in io_subchannel_init_fields()
1001 		sch->opm = 0xff;  in io_subchannel_init_fields()
1003 		sch->opm = chp_get_sch_opm(sch);  in io_subchannel_init_fields()
1004 	sch->lpm = sch->schib.pmcw.pam & sch->opm;  in io_subchannel_init_fields()
1005 	sch->isc = cio_is_console(sch->schid) ? CONSOLE_ISC : IO_SCH_ISC;  in io_subchannel_init_fields()
1009 		      sch->schib.pmcw.dev, sch->schid.ssid,  in io_subchannel_init_fields()
1010 		      sch->schid.sch_no, sch->schib.pmcw.pim,  in io_subchannel_init_fields()
1011 		      sch->schib.pmcw.pam, sch->schib.pmcw.pom);  in io_subchannel_init_fields()
1013 	io_subchannel_init_config(sch);  in io_subchannel_init_fields()
1020 static int io_subchannel_probe(struct subchannel *sch)  in io_subchannel_probe()  argument
1026 	if (cio_is_console(sch->schid)) {  in io_subchannel_probe()
1027 		rc = sysfs_create_group(&sch->dev.kobj,  in io_subchannel_probe()
1033 				      sch->schid.ssid, sch->schid.sch_no, rc);  in io_subchannel_probe()
1039 		dev_set_uevent_suppress(&sch->dev, 0);  in io_subchannel_probe()
1040 		kobject_uevent(&sch->dev.kobj, KOBJ_ADD);  in io_subchannel_probe()
1041 		cdev = sch_get_cdev(sch);  in io_subchannel_probe()
1052 	io_subchannel_init_fields(sch);  in io_subchannel_probe()
1053 	rc = cio_commit_config(sch);  in io_subchannel_probe()
1056 	rc = sysfs_create_group(&sch->dev.kobj,  in io_subchannel_probe()
1065 	set_io_private(sch, io_priv);  in io_subchannel_probe()
1066 	css_schedule_eval(sch->schid);  in io_subchannel_probe()
1070 	spin_lock_irq(sch->lock);  in io_subchannel_probe()
1071 	css_sched_sch_todo(sch, SCH_TODO_UNREG);  in io_subchannel_probe()
1072 	spin_unlock_irq(sch->lock);  in io_subchannel_probe()
1076 static int io_subchannel_remove(struct subchannel *sch)  in io_subchannel_remove()  argument
1078 	struct io_subchannel_private *io_priv = to_io_private(sch);  in io_subchannel_remove()
1081 	cdev = sch_get_cdev(sch);  in io_subchannel_remove()
1086 	spin_lock_irq(sch->lock);  in io_subchannel_remove()
1087 	sch_set_cdev(sch, NULL);  in io_subchannel_remove()
1088 	set_io_private(sch, NULL);  in io_subchannel_remove()
1089 	spin_unlock_irq(sch->lock);  in io_subchannel_remove()
1092 	sysfs_remove_group(&sch->dev.kobj, &io_subchannel_attr_group);  in io_subchannel_remove()
1096 static void io_subchannel_verify(struct subchannel *sch)  in io_subchannel_verify()  argument
1100 	cdev = sch_get_cdev(sch);  in io_subchannel_verify()
1105 static void io_subchannel_terminate_path(struct subchannel *sch, u8 mask)  in io_subchannel_terminate_path()  argument
1109 	cdev = sch_get_cdev(sch);  in io_subchannel_terminate_path()
1112 	if (cio_update_schib(sch))  in io_subchannel_terminate_path()
1115 	if (scsw_actl(&sch->schib.scsw) == 0 || sch->schib.pmcw.lpum != mask)  in io_subchannel_terminate_path()
1121 	if (cio_clear(sch))  in io_subchannel_terminate_path()
1132 static int io_subchannel_chp_event(struct subchannel *sch,  in io_subchannel_chp_event()  argument
1135 	struct ccw_device *cdev = sch_get_cdev(sch);  in io_subchannel_chp_event()
1138 	mask = chp_ssd_get_mask(&sch->ssd_info, link);  in io_subchannel_chp_event()
1143 		sch->opm &= ~mask;  in io_subchannel_chp_event()
1144 		sch->lpm &= ~mask;  in io_subchannel_chp_event()
1147 		io_subchannel_terminate_path(sch, mask);  in io_subchannel_chp_event()
1150 		sch->opm |= mask;  in io_subchannel_chp_event()
1151 		sch->lpm |= mask;  in io_subchannel_chp_event()
1154 		io_subchannel_verify(sch);  in io_subchannel_chp_event()
1157 		if (cio_update_schib(sch))  in io_subchannel_chp_event()
1161 		io_subchannel_terminate_path(sch, mask);  in io_subchannel_chp_event()
1164 		if (cio_update_schib(sch))  in io_subchannel_chp_event()
1166 		sch->lpm |= mask & sch->opm;  in io_subchannel_chp_event()
1169 		io_subchannel_verify(sch);  in io_subchannel_chp_event()
1175 static void io_subchannel_quiesce(struct subchannel *sch)  in io_subchannel_quiesce()  argument
1180 	spin_lock_irq(sch->lock);  in io_subchannel_quiesce()
1181 	cdev = sch_get_cdev(sch);  in io_subchannel_quiesce()
1182 	if (cio_is_console(sch->schid))  in io_subchannel_quiesce()
1184 	if (!sch->schib.pmcw.ena)  in io_subchannel_quiesce()
1186 	ret = cio_disable_subchannel(sch);  in io_subchannel_quiesce()
1197 			spin_unlock_irq(sch->lock);  in io_subchannel_quiesce()
1200 			spin_lock_irq(sch->lock);  in io_subchannel_quiesce()
1202 		ret = cio_disable_subchannel(sch);  in io_subchannel_quiesce()
1205 	spin_unlock_irq(sch->lock);  in io_subchannel_quiesce()
1208 static void io_subchannel_shutdown(struct subchannel *sch)  in io_subchannel_shutdown()  argument
1210 	io_subchannel_quiesce(sch);  in io_subchannel_shutdown()
1224 	struct subchannel *sch;  in recovery_check()  local
1230 		sch = to_subchannel(cdev->dev.parent);  in recovery_check()
1231 		if ((sch->schib.pmcw.pam & sch->opm) == sch->vpm)  in recovery_check()
1339 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_set_notoper()  local
1342 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));  in ccw_device_set_notoper()
1344 	cio_disable_subchannel(sch);  in ccw_device_set_notoper()
1360 static enum io_sch_action sch_get_action(struct subchannel *sch)  in sch_get_action()  argument
1364 	cdev = sch_get_cdev(sch);  in sch_get_action()
1365 	if (cio_update_schib(sch)) {  in sch_get_action()
1376 	if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {  in sch_get_action()
1381 	if ((sch->schib.pmcw.pam & sch->opm) == 0) {  in sch_get_action()
1405 static int io_subchannel_sch_event(struct subchannel *sch, int process)  in io_subchannel_sch_event()  argument
1413 	spin_lock_irqsave(sch->lock, flags);  in io_subchannel_sch_event()
1414 	if (!device_is_registered(&sch->dev))  in io_subchannel_sch_event()
1416 	if (work_pending(&sch->todo_work))  in io_subchannel_sch_event()
1418 	cdev = sch_get_cdev(sch);  in io_subchannel_sch_event()
1421 	action = sch_get_action(sch);  in io_subchannel_sch_event()
1423 		      sch->schid.ssid, sch->schid.sch_no, process,  in io_subchannel_sch_event()
1434 		io_subchannel_verify(sch);  in io_subchannel_sch_event()
1465 	spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_sch_event()
1479 		spin_lock_irqsave(sch->lock, flags);  in io_subchannel_sch_event()
1485 		sch_set_cdev(sch, NULL);  in io_subchannel_sch_event()
1486 		spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_sch_event()
1498 			css_sch_device_unregister(sch);  in io_subchannel_sch_event()
1503 		dev_id.ssid = sch->schid.ssid;  in io_subchannel_sch_event()
1504 		dev_id.devno = sch->schib.pmcw.dev;  in io_subchannel_sch_event()
1507 			sch_create_and_recog_new_device(sch);  in io_subchannel_sch_event()
1510 		rc = ccw_device_move_to_sch(cdev, sch);  in io_subchannel_sch_event()
1516 		spin_lock_irqsave(sch->lock, flags);  in io_subchannel_sch_event()
1518 		spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_sch_event()
1528 	spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_sch_event()
1548 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_enable_console()  local
1554 	io_subchannel_init_fields(sch);  in ccw_device_enable_console()
1555 	rc = cio_commit_config(sch);  in ccw_device_enable_console()
1558 	sch->driver = &io_subchannel_driver;  in ccw_device_enable_console()
1559 	io_subchannel_recog(cdev, sch);  in ccw_device_enable_console()
1589 	struct subchannel *sch;  in ccw_device_create_console()  local
1591 	sch = cio_probe_console();  in ccw_device_create_console()
1592 	if (IS_ERR(sch))  in ccw_device_create_console()
1593 		return ERR_CAST(sch);  in ccw_device_create_console()
1597 		put_device(&sch->dev);  in ccw_device_create_console()
1600 	set_io_private(sch, io_priv);  in ccw_device_create_console()
1601 	cdev = io_subchannel_create_ccwdev(sch);  in ccw_device_create_console()
1603 		put_device(&sch->dev);  in ccw_device_create_console()
1614 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_destroy_console()  local
1615 	struct io_subchannel_private *io_priv = to_io_private(sch);  in ccw_device_destroy_console()
1617 	set_io_private(sch, NULL);  in ccw_device_destroy_console()
1618 	put_device(&sch->dev);  in ccw_device_destroy_console()
1633 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_wait_idle()  local
1636 		cio_tsch(sch);  in ccw_device_wait_idle()
1637 		if (sch->schib.scsw.cmd.actl == 0)  in ccw_device_wait_idle()
1721 	struct subchannel *sch;  in ccw_device_remove()  local
1747 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_remove()
1749 	io_subchannel_quiesce(sch);  in ccw_device_remove()
1792 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_pm_freeze()  local
1806 	spin_lock_irq(sch->lock);  in ccw_device_pm_freeze()
1808 	spin_unlock_irq(sch->lock);  in ccw_device_pm_freeze()
1816 	spin_lock_irq(sch->lock);  in ccw_device_pm_freeze()
1817 	ret = cio_disable_subchannel(sch);  in ccw_device_pm_freeze()
1818 	spin_unlock_irq(sch->lock);  in ccw_device_pm_freeze()
1826 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_pm_thaw()  local
1832 	spin_lock_irq(sch->lock);  in ccw_device_pm_thaw()
1834 	ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);  in ccw_device_pm_thaw()
1836 	spin_unlock_irq(sch->lock);  in ccw_device_pm_thaw()
1854 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in __ccw_device_pm_restore()  local
1856 	spin_lock_irq(sch->lock);  in __ccw_device_pm_restore()
1857 	if (cio_is_console(sch->schid)) {  in __ccw_device_pm_restore()
1858 		cio_enable_subchannel(sch, (u32)(addr_t)sch);  in __ccw_device_pm_restore()
1867 	css_sched_sch_todo(sch, SCH_TODO_EVAL);  in __ccw_device_pm_restore()
1868 	spin_unlock_irq(sch->lock);  in __ccw_device_pm_restore()
1872 	sch = to_subchannel(cdev->dev.parent);  in __ccw_device_pm_restore()
1873 	spin_lock_irq(sch->lock);  in __ccw_device_pm_restore()
1879 	spin_unlock_irq(sch->lock);  in __ccw_device_pm_restore()
1882 	spin_lock_irq(sch->lock);  in __ccw_device_pm_restore()
1886 	spin_unlock_irq(sch->lock);  in __ccw_device_pm_restore()
1910 	struct subchannel *sch;  in ccw_device_pm_restore()  local
1914 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_pm_restore()
1915 	spin_lock_irq(sch->lock);  in ccw_device_pm_restore()
1916 	if (cio_is_console(sch->schid))  in ccw_device_pm_restore()
1952 	spin_unlock_irq(sch->lock);  in ccw_device_pm_restore()
1954 	spin_lock_irq(sch->lock);  in ccw_device_pm_restore()
1964 		spin_unlock_irq(sch->lock);  in ccw_device_pm_restore()
1966 		spin_lock_irq(sch->lock);  in ccw_device_pm_restore()
1976 	spin_unlock_irq(sch->lock);  in ccw_device_pm_restore()
1982 	spin_unlock_irq(sch->lock);  in ccw_device_pm_restore()
2036 	struct subchannel *sch;  in ccw_device_todo()  local
2041 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_todo()
2061 		if (!sch_is_pseudo_sch(sch))  in ccw_device_todo()
2062 			css_schedule_eval(sch->schid);  in ccw_device_todo()
2065 		if (sch_is_pseudo_sch(sch))  in ccw_device_todo()
2112 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_siosl()  local
2114 	return chsc_siosl(sch->schid);  in ccw_device_siosl()