274 	struct subchannel *sch;  in ccw_device_set_offline()  local
288 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_set_offline()
309 		io_subchannel_quiesce(sch);  in ccw_device_set_offline()
544 	struct subchannel *sch;  in available_show()  local
554 		sch = to_subchannel(dev->parent);  in available_show()
555 		if (!sch->lpm)  in available_show()
569 	struct subchannel *sch = to_subchannel(dev);  in initiate_logging()  local
572 	rc = chsc_siosl(sch->schid);  in initiate_logging()
575 			sch->schid.ssid, sch->schid.sch_no, rc);  in initiate_logging()
579 		  sch->schid.ssid, sch->schid.sch_no);  in initiate_logging()
586 	struct subchannel *sch = to_subchannel(dev);  in vpm_show()  local
588 	return sysfs_emit(buf, "%02x\n", sch->vpm);  in vpm_show()
684 static struct ccw_device * io_subchannel_allocate_dev(struct subchannel *sch)  in io_subchannel_allocate_dev()  argument
702 	cdev->dev.dma_mask = sch->dev.dma_mask;  in io_subchannel_allocate_dev()
703 	ret = dma_set_coherent_mask(&cdev->dev, sch->dev.coherent_dma_mask);  in io_subchannel_allocate_dev()
733 static int io_subchannel_initialize_dev(struct subchannel *sch,  in io_subchannel_initialize_dev()  argument
742 	priv->dev_id.devno = sch->schib.pmcw.dev;  in io_subchannel_initialize_dev()
743 	priv->dev_id.ssid = sch->schid.ssid;  in io_subchannel_initialize_dev()
752 	cdev->ccwlock = &sch->lock;  in io_subchannel_initialize_dev()
753 	cdev->dev.parent = &sch->dev;  in io_subchannel_initialize_dev()
763 	if (!get_device(&sch->dev)) {  in io_subchannel_initialize_dev()
768 	spin_lock_irq(&sch->lock);  in io_subchannel_initialize_dev()
769 	sch_set_cdev(sch, cdev);  in io_subchannel_initialize_dev()
770 	spin_unlock_irq(&sch->lock);  in io_subchannel_initialize_dev()
779 static struct ccw_device * io_subchannel_create_ccwdev(struct subchannel *sch)  in io_subchannel_create_ccwdev()  argument
784 	cdev = io_subchannel_allocate_dev(sch);  in io_subchannel_create_ccwdev()
786 		ret = io_subchannel_initialize_dev(sch, cdev);  in io_subchannel_create_ccwdev()
795 static void sch_create_and_recog_new_device(struct subchannel *sch)  in sch_create_and_recog_new_device()  argument
800 	cdev = io_subchannel_create_ccwdev(sch);  in sch_create_and_recog_new_device()
803 		css_sch_device_unregister(sch);  in sch_create_and_recog_new_device()
807 	io_subchannel_recog(cdev, sch);  in sch_create_and_recog_new_device()
815 	struct subchannel *sch;  in io_subchannel_register()  local
819 	sch = to_subchannel(cdev->dev.parent);  in io_subchannel_register()
826 	if (!device_is_registered(&sch->dev))  in io_subchannel_register()
828 	css_update_ssd_info(sch);  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()
902 static void io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch)  in io_subchannel_recog()  argument
908 	spin_lock_irq(&sch->lock);  in io_subchannel_recog()
910 	spin_unlock_irq(&sch->lock);  in io_subchannel_recog()
914 				  struct subchannel *sch)  in ccw_device_move_to_sch()  argument
921 	if (!get_device(&sch->dev))  in ccw_device_move_to_sch()
933 			put_device(&sch->dev);  in ccw_device_move_to_sch()
938 	mutex_lock(&sch->reg_mutex);  in ccw_device_move_to_sch()
939 	rc = device_move(&cdev->dev, &sch->dev, DPM_ORDER_PARENT_BEFORE_DEV);  in ccw_device_move_to_sch()
940 	mutex_unlock(&sch->reg_mutex);  in ccw_device_move_to_sch()
944 			      cdev->private->dev_id.devno, sch->schid.ssid,  in ccw_device_move_to_sch()
945 			      sch->schib.pmcw.dev, rc);  in ccw_device_move_to_sch()
953 		put_device(&sch->dev);  in ccw_device_move_to_sch()
966 	spin_lock_irq(&sch->lock);  in ccw_device_move_to_sch()
967 	cdev->ccwlock = &sch->lock;  in ccw_device_move_to_sch()
968 	if (!sch_is_pseudo_sch(sch))  in ccw_device_move_to_sch()
969 		sch_set_cdev(sch, cdev);  in ccw_device_move_to_sch()
970 	spin_unlock_irq(&sch->lock);  in ccw_device_move_to_sch()
971 	if (!sch_is_pseudo_sch(sch))  in ccw_device_move_to_sch()
972 		css_update_ssd_info(sch);  in ccw_device_move_to_sch()
978 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_move_to_orph()  local
979 	struct channel_subsystem *css = to_css(sch->dev.parent);  in ccw_device_move_to_orph()
984 static void io_subchannel_irq(struct subchannel *sch)  in io_subchannel_irq()  argument
988 	cdev = sch_get_cdev(sch);  in io_subchannel_irq()
991 	CIO_TRACE_EVENT(6, dev_name(&sch->dev));  in io_subchannel_irq()
998 void io_subchannel_init_config(struct subchannel *sch)  in io_subchannel_init_config()  argument
1000 	memset(&sch->config, 0, sizeof(sch->config));  in io_subchannel_init_config()
1001 	sch->config.csense = 1;  in io_subchannel_init_config()
1004 static void io_subchannel_init_fields(struct subchannel *sch)  in io_subchannel_init_fields()  argument
1006 	if (cio_is_console(sch->schid))  in io_subchannel_init_fields()
1007 		sch->opm = 0xff;  in io_subchannel_init_fields()
1009 		sch->opm = chp_get_sch_opm(sch);  in io_subchannel_init_fields()
1010 	sch->lpm = sch->schib.pmcw.pam & sch->opm;  in io_subchannel_init_fields()
1011 	sch->isc = cio_is_console(sch->schid) ? CONSOLE_ISC : IO_SCH_ISC;  in io_subchannel_init_fields()
1015 		      sch->schib.pmcw.dev, sch->schid.ssid,  in io_subchannel_init_fields()
1016 		      sch->schid.sch_no, sch->schib.pmcw.pim,  in io_subchannel_init_fields()
1017 		      sch->schib.pmcw.pam, sch->schib.pmcw.pom);  in io_subchannel_init_fields()
1019 	io_subchannel_init_config(sch);  in io_subchannel_init_fields()
1026 static int io_subchannel_probe(struct subchannel *sch)  in io_subchannel_probe()  argument
1032 	if (cio_is_console(sch->schid)) {  in io_subchannel_probe()
1033 		rc = sysfs_create_group(&sch->dev.kobj,  in io_subchannel_probe()
1039 				      sch->schid.ssid, sch->schid.sch_no, rc);  in io_subchannel_probe()
1044 		cdev = sch_get_cdev(sch);  in io_subchannel_probe()
1055 	io_subchannel_init_fields(sch);  in io_subchannel_probe()
1056 	rc = cio_commit_config(sch);  in io_subchannel_probe()
1059 	rc = sysfs_create_group(&sch->dev.kobj,  in io_subchannel_probe()
1068 	io_priv->dma_area = dma_alloc_coherent(&sch->dev,  in io_subchannel_probe()
1076 	set_io_private(sch, io_priv);  in io_subchannel_probe()
1077 	css_schedule_eval(sch->schid);  in io_subchannel_probe()
1081 	spin_lock_irq(&sch->lock);  in io_subchannel_probe()
1082 	css_sched_sch_todo(sch, SCH_TODO_UNREG);  in io_subchannel_probe()
1083 	spin_unlock_irq(&sch->lock);  in io_subchannel_probe()
1087 static void io_subchannel_remove(struct subchannel *sch)  in io_subchannel_remove()  argument
1089 	struct io_subchannel_private *io_priv = to_io_private(sch);  in io_subchannel_remove()
1092 	cdev = sch_get_cdev(sch);  in io_subchannel_remove()
1097 	spin_lock_irq(&sch->lock);  in io_subchannel_remove()
1098 	sch_set_cdev(sch, NULL);  in io_subchannel_remove()
1099 	set_io_private(sch, NULL);  in io_subchannel_remove()
1100 	spin_unlock_irq(&sch->lock);  in io_subchannel_remove()
1102 	dma_free_coherent(&sch->dev, sizeof(*io_priv->dma_area),  in io_subchannel_remove()
1105 	sysfs_remove_group(&sch->dev.kobj, &io_subchannel_attr_group);  in io_subchannel_remove()
1108 static void io_subchannel_verify(struct subchannel *sch)  in io_subchannel_verify()  argument
1112 	cdev = sch_get_cdev(sch);  in io_subchannel_verify()
1116 		css_schedule_eval(sch->schid);  in io_subchannel_verify()
1119 static void io_subchannel_terminate_path(struct subchannel *sch, u8 mask)  in io_subchannel_terminate_path()  argument
1123 	cdev = sch_get_cdev(sch);  in io_subchannel_terminate_path()
1126 	if (cio_update_schib(sch))  in io_subchannel_terminate_path()
1129 	if (scsw_actl(&sch->schib.scsw) == 0 || sch->schib.pmcw.lpum != mask)  in io_subchannel_terminate_path()
1135 	if (cio_clear(sch))  in io_subchannel_terminate_path()
1146 static int io_subchannel_chp_event(struct subchannel *sch,  in io_subchannel_chp_event()  argument
1149 	struct ccw_device *cdev = sch_get_cdev(sch);  in io_subchannel_chp_event()
1153 	mask = chp_ssd_get_mask(&sch->ssd_info, link);  in io_subchannel_chp_event()
1158 		sch->opm &= ~mask;  in io_subchannel_chp_event()
1159 		sch->lpm &= ~mask;  in io_subchannel_chp_event()
1162 		io_subchannel_terminate_path(sch, mask);  in io_subchannel_chp_event()
1165 		sch->opm |= mask;  in io_subchannel_chp_event()
1166 		sch->lpm |= mask;  in io_subchannel_chp_event()
1169 		io_subchannel_verify(sch);  in io_subchannel_chp_event()
1172 		if (cio_update_schib(sch))  in io_subchannel_chp_event()
1176 		io_subchannel_terminate_path(sch, mask);  in io_subchannel_chp_event()
1179 		if (cio_update_schib(sch))  in io_subchannel_chp_event()
1181 		sch->lpm |= mask & sch->opm;  in io_subchannel_chp_event()
1184 		io_subchannel_verify(sch);  in io_subchannel_chp_event()
1202 static void io_subchannel_quiesce(struct subchannel *sch)  in io_subchannel_quiesce()  argument
1207 	spin_lock_irq(&sch->lock);  in io_subchannel_quiesce()
1208 	cdev = sch_get_cdev(sch);  in io_subchannel_quiesce()
1209 	if (cio_is_console(sch->schid))  in io_subchannel_quiesce()
1211 	if (!sch->schib.pmcw.ena)  in io_subchannel_quiesce()
1213 	ret = cio_disable_subchannel(sch);  in io_subchannel_quiesce()
1224 			spin_unlock_irq(&sch->lock);  in io_subchannel_quiesce()
1227 			spin_lock_irq(&sch->lock);  in io_subchannel_quiesce()
1229 		ret = cio_disable_subchannel(sch);  in io_subchannel_quiesce()
1232 	spin_unlock_irq(&sch->lock);  in io_subchannel_quiesce()
1235 static void io_subchannel_shutdown(struct subchannel *sch)  in io_subchannel_shutdown()  argument
1237 	io_subchannel_quiesce(sch);  in io_subchannel_shutdown()
1251 	struct subchannel *sch;  in recovery_check()  local
1257 		sch = to_subchannel(cdev->dev.parent);  in recovery_check()
1258 		if ((sch->schib.pmcw.pam & sch->opm) == sch->vpm)  in recovery_check()
1319 static int purge_fn(struct subchannel *sch, void *data)  in purge_fn()  argument
1323 	spin_lock_irq(&sch->lock);  in purge_fn()
1324 	if (sch->st != SUBCHANNEL_TYPE_IO || !sch->schib.pmcw.dnv)  in purge_fn()
1327 	if (!is_blacklisted(sch->schid.ssid, sch->schib.pmcw.dev))  in purge_fn()
1330 	cdev = sch_get_cdev(sch);  in purge_fn()
1341 	css_sched_sch_todo(sch, SCH_TODO_UNREG);  in purge_fn()
1342 	CIO_MSG_EVENT(3, "ccw: purging 0.%x.%04x%s\n", sch->schid.ssid,  in purge_fn()
1343 		      sch->schib.pmcw.dev, cdev ? "" : " (no cdev)");  in purge_fn()
1346 	spin_unlock_irq(&sch->lock);  in purge_fn()
1379 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_set_notoper()  local
1382 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));  in ccw_device_set_notoper()
1384 	cio_disable_subchannel(sch);  in ccw_device_set_notoper()
1402 static enum io_sch_action sch_get_action(struct subchannel *sch)  in sch_get_action()  argument
1407 	cdev = sch_get_cdev(sch);  in sch_get_action()
1408 	rc = cio_update_schib(sch);  in sch_get_action()
1431 	if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {  in sch_get_action()
1436 	if ((sch->schib.pmcw.pam & sch->opm) == 0) {  in sch_get_action()
1452  * @sch: subchannel
1460 static int io_subchannel_sch_event(struct subchannel *sch, int process)  in io_subchannel_sch_event()  argument
1468 	spin_lock_irqsave(&sch->lock, flags);  in io_subchannel_sch_event()
1469 	if (!device_is_registered(&sch->dev))  in io_subchannel_sch_event()
1471 	if (work_pending(&sch->todo_work))  in io_subchannel_sch_event()
1473 	cdev = sch_get_cdev(sch);  in io_subchannel_sch_event()
1476 	action = sch_get_action(sch);  in io_subchannel_sch_event()
1477 	CIO_MSG_EVENT(2, "event: sch 0.%x.%04x, process=%d, action=%d\n",  in io_subchannel_sch_event()
1478 		      sch->schid.ssid, sch->schid.sch_no, process,  in io_subchannel_sch_event()
1489 		io_subchannel_verify(sch);  in io_subchannel_sch_event()
1522 	spin_unlock_irqrestore(&sch->lock, flags);  in io_subchannel_sch_event()
1538 		spin_lock_irqsave(&sch->lock, flags);  in io_subchannel_sch_event()
1539 		sch_set_cdev(sch, NULL);  in io_subchannel_sch_event()
1540 		spin_unlock_irqrestore(&sch->lock, flags);  in io_subchannel_sch_event()
1551 		css_sch_device_unregister(sch);  in io_subchannel_sch_event()
1556 		dev_id.ssid = sch->schid.ssid;  in io_subchannel_sch_event()
1557 		dev_id.devno = sch->schib.pmcw.dev;  in io_subchannel_sch_event()
1560 			sch_create_and_recog_new_device(sch);  in io_subchannel_sch_event()
1563 		rc = ccw_device_move_to_sch(cdev, sch);  in io_subchannel_sch_event()
1569 		spin_lock_irqsave(&sch->lock, flags);  in io_subchannel_sch_event()
1571 		spin_unlock_irqrestore(&sch->lock, flags);  in io_subchannel_sch_event()
1581 	spin_unlock_irqrestore(&sch->lock, flags);  in io_subchannel_sch_event()
1601 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_enable_console()  local
1607 	io_subchannel_init_fields(sch);  in ccw_device_enable_console()
1608 	rc = cio_commit_config(sch);  in ccw_device_enable_console()
1611 	sch->driver = &io_subchannel_driver;  in ccw_device_enable_console()
1612 	io_subchannel_recog(cdev, sch);  in ccw_device_enable_console()
1642 	struct subchannel *sch;  in ccw_device_create_console()  local
1644 	sch = cio_probe_console();  in ccw_device_create_console()
1645 	if (IS_ERR(sch))  in ccw_device_create_console()
1646 		return ERR_CAST(sch);  in ccw_device_create_console()
1651 	io_priv->dma_area = dma_alloc_coherent(&sch->dev,  in ccw_device_create_console()
1656 	set_io_private(sch, io_priv);  in ccw_device_create_console()
1657 	cdev = io_subchannel_create_ccwdev(sch);  in ccw_device_create_console()
1659 		dma_free_coherent(&sch->dev, sizeof(*io_priv->dma_area),  in ccw_device_create_console()
1661 		set_io_private(sch, NULL);  in ccw_device_create_console()
1662 		put_device(&sch->dev);  in ccw_device_create_console()
1673 	put_device(&sch->dev);  in ccw_device_create_console()
1679 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_destroy_console()  local
1680 	struct io_subchannel_private *io_priv = to_io_private(sch);  in ccw_device_destroy_console()
1682 	set_io_private(sch, NULL);  in ccw_device_destroy_console()
1683 	dma_free_coherent(&sch->dev, sizeof(*io_priv->dma_area),  in ccw_device_destroy_console()
1685 	put_device(&sch->dev);  in ccw_device_destroy_console()
1700 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_wait_idle()  local
1703 		cio_tsch(sch);  in ccw_device_wait_idle()
1704 		if (sch->schib.scsw.cmd.actl == 0)  in ccw_device_wait_idle()
1765 	struct subchannel *sch;  in ccw_device_remove()  local
1791 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_remove()
1793 	io_subchannel_quiesce(sch);  in ccw_device_remove()
1848 	struct subchannel *sch;  in ccw_device_todo()  local
1853 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_todo()
1873 		if (!sch_is_pseudo_sch(sch))  in ccw_device_todo()
1874 			css_schedule_eval(sch->schid);  in ccw_device_todo()
1877 		spin_lock_irq(&sch->lock);  in ccw_device_todo()
1878 		sch_set_cdev(sch, NULL);  in ccw_device_todo()
1879 		spin_unlock_irq(&sch->lock);  in ccw_device_todo()
1924 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_siosl()  local
1926 	return chsc_siosl(sch->schid);  in ccw_device_siosl()