152 static int io_subchannel_prepare(struct subchannel *sch)  in io_subchannel_prepare()  argument
159 	cdev = sch_get_cdev(sch);  in io_subchannel_prepare()
287 	struct subchannel *sch;  in ccw_device_set_offline()  local
301 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_set_offline()
322 		io_subchannel_quiesce(sch);  in ccw_device_set_offline()
554 	struct subchannel *sch;  in available_show()  local
564 		sch = to_subchannel(dev->parent);  in available_show()
565 		if (!sch->lpm)  in available_show()
579 	struct subchannel *sch = to_subchannel(dev);  in initiate_logging()  local
582 	rc = chsc_siosl(sch->schid);  in initiate_logging()
585 			sch->schid.ssid, sch->schid.sch_no, rc);  in initiate_logging()
589 		  sch->schid.ssid, sch->schid.sch_no);  in initiate_logging()
596 	struct subchannel *sch = to_subchannel(dev);  in vpm_show()  local
598 	return sprintf(buf, "%02x\n", sch->vpm);  in vpm_show()
700 static struct ccw_device * io_subchannel_allocate_dev(struct subchannel *sch)  in io_subchannel_allocate_dev()  argument
712 	cdev->dev.coherent_dma_mask = sch->dev.coherent_dma_mask;  in io_subchannel_allocate_dev()
713 	cdev->dev.dma_mask = sch->dev.dma_mask;  in io_subchannel_allocate_dev()
735 static int io_subchannel_initialize_dev(struct subchannel *sch,  in io_subchannel_initialize_dev()  argument
744 	priv->dev_id.devno = sch->schib.pmcw.dev;  in io_subchannel_initialize_dev()
745 	priv->dev_id.ssid = sch->schid.ssid;  in io_subchannel_initialize_dev()
753 	cdev->ccwlock = sch->lock;  in io_subchannel_initialize_dev()
754 	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()
852 	dev_set_uevent_suppress(&sch->dev, 0);  in io_subchannel_register()
853 	kobject_uevent(&sch->dev.kobj, KOBJ_ADD);  in io_subchannel_register()
860 		spin_lock_irqsave(sch->lock, flags);  in io_subchannel_register()
861 		sch_set_cdev(sch, NULL);  in io_subchannel_register()
862 		spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_register()
877 	struct subchannel *sch;  in ccw_device_call_sch_unregister()  local
882 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_call_sch_unregister()
883 	css_sch_device_unregister(sch);  in ccw_device_call_sch_unregister()
885 	put_device(&sch->dev);  in ccw_device_call_sch_unregister()
918 static void io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch)  in io_subchannel_recog()  argument
924 	spin_lock_irq(sch->lock);  in io_subchannel_recog()
926 	spin_unlock_irq(sch->lock);  in io_subchannel_recog()
930 				  struct subchannel *sch)  in ccw_device_move_to_sch()  argument
937 	if (!get_device(&sch->dev))  in ccw_device_move_to_sch()
949 			put_device(&sch->dev);  in ccw_device_move_to_sch()
954 	mutex_lock(&sch->reg_mutex);  in ccw_device_move_to_sch()
955 	rc = device_move(&cdev->dev, &sch->dev, DPM_ORDER_PARENT_BEFORE_DEV);  in ccw_device_move_to_sch()
956 	mutex_unlock(&sch->reg_mutex);  in ccw_device_move_to_sch()
960 			      cdev->private->dev_id.devno, sch->schid.ssid,  in ccw_device_move_to_sch()
961 			      sch->schib.pmcw.dev, rc);  in ccw_device_move_to_sch()
969 		put_device(&sch->dev);  in ccw_device_move_to_sch()
982 	spin_lock_irq(sch->lock);  in ccw_device_move_to_sch()
983 	cdev->ccwlock = sch->lock;  in ccw_device_move_to_sch()
984 	if (!sch_is_pseudo_sch(sch))  in ccw_device_move_to_sch()
985 		sch_set_cdev(sch, cdev);  in ccw_device_move_to_sch()
986 	spin_unlock_irq(sch->lock);  in ccw_device_move_to_sch()
987 	if (!sch_is_pseudo_sch(sch))  in ccw_device_move_to_sch()
988 		css_update_ssd_info(sch);  in ccw_device_move_to_sch()
994 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_move_to_orph()  local
995 	struct channel_subsystem *css = to_css(sch->dev.parent);  in ccw_device_move_to_orph()
1000 static void io_subchannel_irq(struct subchannel *sch)  in io_subchannel_irq()  argument
1004 	cdev = sch_get_cdev(sch);  in io_subchannel_irq()
1007 	CIO_TRACE_EVENT(6, dev_name(&sch->dev));  in io_subchannel_irq()
1014 void io_subchannel_init_config(struct subchannel *sch)  in io_subchannel_init_config()  argument
1016 	memset(&sch->config, 0, sizeof(sch->config));  in io_subchannel_init_config()
1017 	sch->config.csense = 1;  in io_subchannel_init_config()
1020 static void io_subchannel_init_fields(struct subchannel *sch)  in io_subchannel_init_fields()  argument
1022 	if (cio_is_console(sch->schid))  in io_subchannel_init_fields()
1023 		sch->opm = 0xff;  in io_subchannel_init_fields()
1025 		sch->opm = chp_get_sch_opm(sch);  in io_subchannel_init_fields()
1026 	sch->lpm = sch->schib.pmcw.pam & sch->opm;  in io_subchannel_init_fields()
1027 	sch->isc = cio_is_console(sch->schid) ? CONSOLE_ISC : IO_SCH_ISC;  in io_subchannel_init_fields()
1031 		      sch->schib.pmcw.dev, sch->schid.ssid,  in io_subchannel_init_fields()
1032 		      sch->schid.sch_no, sch->schib.pmcw.pim,  in io_subchannel_init_fields()
1033 		      sch->schib.pmcw.pam, sch->schib.pmcw.pom);  in io_subchannel_init_fields()
1035 	io_subchannel_init_config(sch);  in io_subchannel_init_fields()
1042 static int io_subchannel_probe(struct subchannel *sch)  in io_subchannel_probe()  argument
1048 	if (cio_is_console(sch->schid)) {  in io_subchannel_probe()
1049 		rc = sysfs_create_group(&sch->dev.kobj,  in io_subchannel_probe()
1055 				      sch->schid.ssid, sch->schid.sch_no, rc);  in io_subchannel_probe()
1061 		dev_set_uevent_suppress(&sch->dev, 0);  in io_subchannel_probe()
1062 		kobject_uevent(&sch->dev.kobj, KOBJ_ADD);  in io_subchannel_probe()
1063 		cdev = sch_get_cdev(sch);  in io_subchannel_probe()
1074 	io_subchannel_init_fields(sch);  in io_subchannel_probe()
1075 	rc = cio_commit_config(sch);  in io_subchannel_probe()
1078 	rc = sysfs_create_group(&sch->dev.kobj,  in io_subchannel_probe()
1087 	io_priv->dma_area = dma_alloc_coherent(&sch->dev,  in io_subchannel_probe()
1095 	set_io_private(sch, io_priv);  in io_subchannel_probe()
1096 	css_schedule_eval(sch->schid);  in io_subchannel_probe()
1100 	spin_lock_irq(sch->lock);  in io_subchannel_probe()
1101 	css_sched_sch_todo(sch, SCH_TODO_UNREG);  in io_subchannel_probe()
1102 	spin_unlock_irq(sch->lock);  in io_subchannel_probe()
1106 static int io_subchannel_remove(struct subchannel *sch)  in io_subchannel_remove()  argument
1108 	struct io_subchannel_private *io_priv = to_io_private(sch);  in io_subchannel_remove()
1111 	cdev = sch_get_cdev(sch);  in io_subchannel_remove()
1116 	spin_lock_irq(sch->lock);  in io_subchannel_remove()
1117 	sch_set_cdev(sch, NULL);  in io_subchannel_remove()
1118 	set_io_private(sch, NULL);  in io_subchannel_remove()
1119 	spin_unlock_irq(sch->lock);  in io_subchannel_remove()
1121 	dma_free_coherent(&sch->dev, sizeof(*io_priv->dma_area),  in io_subchannel_remove()
1124 	sysfs_remove_group(&sch->dev.kobj, &io_subchannel_attr_group);  in io_subchannel_remove()
1128 static void io_subchannel_verify(struct subchannel *sch)  in io_subchannel_verify()  argument
1132 	cdev = sch_get_cdev(sch);  in io_subchannel_verify()
1137 static void io_subchannel_terminate_path(struct subchannel *sch, u8 mask)  in io_subchannel_terminate_path()  argument
1141 	cdev = sch_get_cdev(sch);  in io_subchannel_terminate_path()
1144 	if (cio_update_schib(sch))  in io_subchannel_terminate_path()
1147 	if (scsw_actl(&sch->schib.scsw) == 0 || sch->schib.pmcw.lpum != mask)  in io_subchannel_terminate_path()
1153 	if (cio_clear(sch))  in io_subchannel_terminate_path()
1164 static int io_subchannel_chp_event(struct subchannel *sch,  in io_subchannel_chp_event()  argument
1167 	struct ccw_device *cdev = sch_get_cdev(sch);  in io_subchannel_chp_event()
1170 	mask = chp_ssd_get_mask(&sch->ssd_info, link);  in io_subchannel_chp_event()
1175 		sch->opm &= ~mask;  in io_subchannel_chp_event()
1176 		sch->lpm &= ~mask;  in io_subchannel_chp_event()
1179 		io_subchannel_terminate_path(sch, mask);  in io_subchannel_chp_event()
1182 		sch->opm |= mask;  in io_subchannel_chp_event()
1183 		sch->lpm |= mask;  in io_subchannel_chp_event()
1186 		io_subchannel_verify(sch);  in io_subchannel_chp_event()
1189 		if (cio_update_schib(sch))  in io_subchannel_chp_event()
1193 		io_subchannel_terminate_path(sch, mask);  in io_subchannel_chp_event()
1196 		if (cio_update_schib(sch))  in io_subchannel_chp_event()
1198 		sch->lpm |= mask & sch->opm;  in io_subchannel_chp_event()
1201 		io_subchannel_verify(sch);  in io_subchannel_chp_event()
1207 static void io_subchannel_quiesce(struct subchannel *sch)  in io_subchannel_quiesce()  argument
1212 	spin_lock_irq(sch->lock);  in io_subchannel_quiesce()
1213 	cdev = sch_get_cdev(sch);  in io_subchannel_quiesce()
1214 	if (cio_is_console(sch->schid))  in io_subchannel_quiesce()
1216 	if (!sch->schib.pmcw.ena)  in io_subchannel_quiesce()
1218 	ret = cio_disable_subchannel(sch);  in io_subchannel_quiesce()
1229 			spin_unlock_irq(sch->lock);  in io_subchannel_quiesce()
1232 			spin_lock_irq(sch->lock);  in io_subchannel_quiesce()
1234 		ret = cio_disable_subchannel(sch);  in io_subchannel_quiesce()
1237 	spin_unlock_irq(sch->lock);  in io_subchannel_quiesce()
1240 static void io_subchannel_shutdown(struct subchannel *sch)  in io_subchannel_shutdown()  argument
1242 	io_subchannel_quiesce(sch);  in io_subchannel_shutdown()
1256 	struct subchannel *sch;  in recovery_check()  local
1262 		sch = to_subchannel(cdev->dev.parent);  in recovery_check()
1263 		if ((sch->schib.pmcw.pam & sch->opm) == sch->vpm)  in recovery_check()
1371 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_set_notoper()  local
1374 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));  in ccw_device_set_notoper()
1376 	cio_disable_subchannel(sch);  in ccw_device_set_notoper()
1392 static enum io_sch_action sch_get_action(struct subchannel *sch)  in sch_get_action()  argument
1396 	cdev = sch_get_cdev(sch);  in sch_get_action()
1397 	if (cio_update_schib(sch)) {  in sch_get_action()
1408 	if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {  in sch_get_action()
1413 	if ((sch->schib.pmcw.pam & sch->opm) == 0) {  in sch_get_action()
1437 static int io_subchannel_sch_event(struct subchannel *sch, int process)  in io_subchannel_sch_event()  argument
1445 	spin_lock_irqsave(sch->lock, flags);  in io_subchannel_sch_event()
1446 	if (!device_is_registered(&sch->dev))  in io_subchannel_sch_event()
1448 	if (work_pending(&sch->todo_work))  in io_subchannel_sch_event()
1450 	cdev = sch_get_cdev(sch);  in io_subchannel_sch_event()
1453 	action = sch_get_action(sch);  in io_subchannel_sch_event()
1455 		      sch->schid.ssid, sch->schid.sch_no, process,  in io_subchannel_sch_event()
1466 		io_subchannel_verify(sch);  in io_subchannel_sch_event()
1497 	spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_sch_event()
1511 		spin_lock_irqsave(sch->lock, flags);  in io_subchannel_sch_event()
1517 		sch_set_cdev(sch, NULL);  in io_subchannel_sch_event()
1518 		spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_sch_event()
1530 			css_sch_device_unregister(sch);  in io_subchannel_sch_event()
1535 		dev_id.ssid = sch->schid.ssid;  in io_subchannel_sch_event()
1536 		dev_id.devno = sch->schib.pmcw.dev;  in io_subchannel_sch_event()
1539 			sch_create_and_recog_new_device(sch);  in io_subchannel_sch_event()
1542 		rc = ccw_device_move_to_sch(cdev, sch);  in io_subchannel_sch_event()
1548 		spin_lock_irqsave(sch->lock, flags);  in io_subchannel_sch_event()
1550 		spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_sch_event()
1560 	spin_unlock_irqrestore(sch->lock, flags);  in io_subchannel_sch_event()
1580 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_enable_console()  local
1586 	io_subchannel_init_fields(sch);  in ccw_device_enable_console()
1587 	rc = cio_commit_config(sch);  in ccw_device_enable_console()
1590 	sch->driver = &io_subchannel_driver;  in ccw_device_enable_console()
1591 	io_subchannel_recog(cdev, sch);  in ccw_device_enable_console()
1621 	struct subchannel *sch;  in ccw_device_create_console()  local
1623 	sch = cio_probe_console();  in ccw_device_create_console()
1624 	if (IS_ERR(sch))  in ccw_device_create_console()
1625 		return ERR_CAST(sch);  in ccw_device_create_console()
1630 	io_priv->dma_area = dma_alloc_coherent(&sch->dev,  in ccw_device_create_console()
1635 	set_io_private(sch, io_priv);  in ccw_device_create_console()
1636 	cdev = io_subchannel_create_ccwdev(sch);  in ccw_device_create_console()
1638 		dma_free_coherent(&sch->dev, sizeof(*io_priv->dma_area),  in ccw_device_create_console()
1640 		set_io_private(sch, NULL);  in ccw_device_create_console()
1641 		put_device(&sch->dev);  in ccw_device_create_console()
1652 	put_device(&sch->dev);  in ccw_device_create_console()
1658 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_destroy_console()  local
1659 	struct io_subchannel_private *io_priv = to_io_private(sch);  in ccw_device_destroy_console()
1661 	set_io_private(sch, NULL);  in ccw_device_destroy_console()
1662 	put_device(&sch->dev);  in ccw_device_destroy_console()
1664 	dma_free_coherent(&sch->dev, sizeof(*io_priv->dma_area),  in ccw_device_destroy_console()
1679 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_wait_idle()  local
1682 		cio_tsch(sch);  in ccw_device_wait_idle()
1683 		if (sch->schib.scsw.cmd.actl == 0)  in ccw_device_wait_idle()
1752 	struct subchannel *sch;  in ccw_device_remove()  local
1778 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_remove()
1780 	io_subchannel_quiesce(sch);  in ccw_device_remove()
1823 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_pm_freeze()  local
1837 	spin_lock_irq(sch->lock);  in ccw_device_pm_freeze()
1839 	spin_unlock_irq(sch->lock);  in ccw_device_pm_freeze()
1847 	spin_lock_irq(sch->lock);  in ccw_device_pm_freeze()
1848 	ret = cio_disable_subchannel(sch);  in ccw_device_pm_freeze()
1849 	spin_unlock_irq(sch->lock);  in ccw_device_pm_freeze()
1857 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_pm_thaw()  local
1863 	spin_lock_irq(sch->lock);  in ccw_device_pm_thaw()
1865 	ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);  in ccw_device_pm_thaw()
1867 	spin_unlock_irq(sch->lock);  in ccw_device_pm_thaw()
1885 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in __ccw_device_pm_restore()  local
1887 	spin_lock_irq(sch->lock);  in __ccw_device_pm_restore()
1888 	if (cio_is_console(sch->schid)) {  in __ccw_device_pm_restore()
1889 		cio_enable_subchannel(sch, (u32)(addr_t)sch);  in __ccw_device_pm_restore()
1898 	css_sched_sch_todo(sch, SCH_TODO_EVAL);  in __ccw_device_pm_restore()
1899 	spin_unlock_irq(sch->lock);  in __ccw_device_pm_restore()
1903 	sch = to_subchannel(cdev->dev.parent);  in __ccw_device_pm_restore()
1904 	spin_lock_irq(sch->lock);  in __ccw_device_pm_restore()
1910 	spin_unlock_irq(sch->lock);  in __ccw_device_pm_restore()
1913 	spin_lock_irq(sch->lock);  in __ccw_device_pm_restore()
1917 	spin_unlock_irq(sch->lock);  in __ccw_device_pm_restore()
1941 	struct subchannel *sch;  in ccw_device_pm_restore()  local
1945 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_pm_restore()
1946 	spin_lock_irq(sch->lock);  in ccw_device_pm_restore()
1947 	if (cio_is_console(sch->schid))  in ccw_device_pm_restore()
1983 	spin_unlock_irq(sch->lock);  in ccw_device_pm_restore()
1985 	spin_lock_irq(sch->lock);  in ccw_device_pm_restore()
1995 		spin_unlock_irq(sch->lock);  in ccw_device_pm_restore()
1997 		spin_lock_irq(sch->lock);  in ccw_device_pm_restore()
2007 	spin_unlock_irq(sch->lock);  in ccw_device_pm_restore()
2013 	spin_unlock_irq(sch->lock);  in ccw_device_pm_restore()
2067 	struct subchannel *sch;  in ccw_device_todo()  local
2072 	sch = to_subchannel(cdev->dev.parent);  in ccw_device_todo()
2092 		if (!sch_is_pseudo_sch(sch))  in ccw_device_todo()
2093 			css_schedule_eval(sch->schid);  in ccw_device_todo()
2096 		if (sch_is_pseudo_sch(sch))  in ccw_device_todo()
2143 	struct subchannel *sch = to_subchannel(cdev->dev.parent);  in ccw_device_siosl()  local
2145 	return chsc_siosl(sch->schid);  in ccw_device_siosl()