10  * Device mapping and dasd= parameter parsing functions. All devmap
38  * between device number and device index. To find a dasd_devmap_t
39  * that corresponds to a device number of a device index each
41  * the device number and one to search by the device index. As
42  * soon as big minor numbers are available the device index list
43  * can be removed since the device number will then be identical
44  * to the device index.
51 	struct dasd_device *device;  member
131  * Read a device busid/devno from a string.
141 			pr_err("The IPL device is not a CCW device\n");  in dasd_busid()
206 			pr_warn("%.*s is not a supported device option\n",  in dasd_feature_list()
274  * Split a string of a device range into its pieces and return the from, to, and
286 	/* Do we have a range or a single device? */  in dasd_evaluate_range_param()
305  * Try to interprete the range string as a device number or a range of devices.
345 			pr_err("%s is not a valid device range\n", range);  in dasd_parse_range()
356 	/* each device in dasd= parameter should be set initially online */  in dasd_parse_range()
376  * keywords and device ranges. The parameters in that list will be stored as
404  * Add a devmap for the device specified by busid. It is possible that
431 		new->device = NULL;  in dasd_add_busid()
459  * Find devmap for device with given bus_id.
482  * Forget all about the device numbers added so far.
494 			BUG_ON(devmap->device != NULL);  in dasd_forget_ranges()
503  * Find the device struct by its device index.
509 	struct dasd_device *device;  in dasd_device_from_devindex()  local
517 				/* Found the devmap for the device. */  in dasd_device_from_devindex()
521 	if (devmap && devmap->device) {  in dasd_device_from_devindex()
522 		device = devmap->device;  in dasd_device_from_devindex()
523 		dasd_get_device(device);  in dasd_device_from_devindex()
525 		device = ERR_PTR(-ENODEV);  in dasd_device_from_devindex()
527 	return device;  in dasd_device_from_devindex()
547  * Create a dasd device structure for cdev.
553 	struct dasd_device *device;  in dasd_create_device()  local
561 	device = dasd_alloc_device();  in dasd_create_device()
562 	if (IS_ERR(device))  in dasd_create_device()
563 		return device;  in dasd_create_device()
564 	atomic_set(&device->ref_count, 3);  in dasd_create_device()
567 	if (!devmap->device) {  in dasd_create_device()
568 		devmap->device = device;  in dasd_create_device()
569 		device->devindex = devmap->devindex;  in dasd_create_device()
570 		device->features = devmap->features;  in dasd_create_device()
572 		device->cdev = cdev;  in dasd_create_device()
580 		dasd_free_device(device);  in dasd_create_device()
585 	dev_set_drvdata(&cdev->dev, device);  in dasd_create_device()
588 	device->paths_info = kset_create_and_add("paths_info", NULL,  in dasd_create_device()
589 						 &device->cdev->dev.kobj);  in dasd_create_device()
590 	if (!device->paths_info)  in dasd_create_device()
593 	return device;  in dasd_create_device()
599 static int dasd_devmap_get_pprc_status(struct dasd_device *device,  in dasd_devmap_get_pprc_status()  argument
604 	if (!device->discipline || !device->discipline->pprc_status) {  in dasd_devmap_get_pprc_status()
605 		dev_warn(&device->cdev->dev, "Unable to query copy relation status\n");  in dasd_devmap_get_pprc_status()
613 	if (device->discipline->pprc_status(device, temp)) {  in dasd_devmap_get_pprc_status()
614 		dev_warn(&device->cdev->dev, "Error during copy relation status query\n");  in dasd_devmap_get_pprc_status()
625  * depending on the primary/secondary state of the device it has to be
652  *   - is the given device part of a copy pair setup
653  *   - does the state of the device match the state in the PPRC status data
654  *   - does the device UID match with the UID in the PPRC status data
655  *   - to prevent misrouted IO check if the given device is present in all
658 static int dasd_devmap_check_copy_relation(struct dasd_device *device,  in dasd_devmap_check_copy_relation()  argument
668 	if (!device->discipline || !device->discipline->get_uid ||  in dasd_devmap_check_copy_relation()
669 	    device->discipline->get_uid(device, &uid))  in dasd_devmap_check_copy_relation()
674 		dev_warn(&device->cdev->dev, "Device not part of a copy relation\n");  in dasd_devmap_check_copy_relation()
678 	/* double check which role the current device has */  in dasd_devmap_check_copy_relation()
681 			dev_warn(&device->cdev->dev, "Copy pair secondary is setup as primary\n");  in dasd_devmap_check_copy_relation()
686 			dev_warn(&device->cdev->dev,  in dasd_devmap_check_copy_relation()
687 				 "Primary device %s does not match copy pair status primary device %04x\n",  in dasd_devmap_check_copy_relation()
688 				 dev_name(&device->cdev->dev),  in dasd_devmap_check_copy_relation()
695 			dev_warn(&device->cdev->dev, "Copy pair primary is setup as secondary\n");  in dasd_devmap_check_copy_relation()
700 			dev_warn(&device->cdev->dev,  in dasd_devmap_check_copy_relation()
701 				 "Secondary device %s does not match copy pair status secondary device %04x\n",  in dasd_devmap_check_copy_relation()
702 				 dev_name(&device->cdev->dev),  in dasd_devmap_check_copy_relation()
710 	 * the current device has to be part of the copy relation of all  in dasd_devmap_check_copy_relation()
715 			tmp_dev = device;  in dasd_devmap_check_copy_relation()
717 			tmp_dev = copy->entry[j].device;  in dasd_devmap_check_copy_relation()
727 				 "Copy pair relation does not contain device: %s\n",  in dasd_devmap_check_copy_relation()
728 				 dev_name(&device->cdev->dev));  in dasd_devmap_check_copy_relation()
737 /* delete device from copy relation entry */
738 static void dasd_devmap_delete_copy_relation_device(struct dasd_device *device)  in dasd_devmap_delete_copy_relation_device()  argument
743 	if (!device->copy)  in dasd_devmap_delete_copy_relation_device()
746 	copy = device->copy;  in dasd_devmap_delete_copy_relation_device()
748 		if (copy->entry[i].device == device)  in dasd_devmap_delete_copy_relation_device()
749 			copy->entry[i].device = NULL;  in dasd_devmap_delete_copy_relation_device()
751 	dasd_put_device(device);  in dasd_devmap_delete_copy_relation_device()
752 	device->copy = NULL;  in dasd_devmap_delete_copy_relation_device()
756  * read all required information for a copy relation setup and setup the device
766 	struct dasd_device *device;  in dasd_devmap_set_device_copy_relation()  local
773 	device = devmap->device;  in dasd_devmap_set_device_copy_relation()
774 	if (!device)  in dasd_devmap_set_device_copy_relation()
778 	/* no copy pair setup for this device */  in dasd_devmap_set_device_copy_relation()
782 	rc = dasd_devmap_get_pprc_status(device, &data);  in dasd_devmap_set_device_copy_relation()
794 		dev_warn(&device->cdev->dev, "Copy pair setup requested for device not in copy relation\n");  in dasd_devmap_set_device_copy_relation()
808 		dev_warn(&device->cdev->dev, "Copy relation entry not found\n");  in dasd_devmap_set_device_copy_relation()
813 	if (dasd_devmap_check_copy_relation(device, entry, data, copy)) {  in dasd_devmap_set_device_copy_relation()
814 		dev_warn(&device->cdev->dev, "Copy relation faulty\n");  in dasd_devmap_set_device_copy_relation()
819 	dasd_get_device(device);  in dasd_devmap_set_device_copy_relation()
820 	copy->entry[i].device = device;  in dasd_devmap_set_device_copy_relation()
821 	device->copy = copy;  in dasd_devmap_set_device_copy_relation()
834  * Remove a dasd device structure. The passed referenced
838 dasd_delete_device(struct dasd_device *device)  in dasd_delete_device()  argument
844 	/* First remove device pointer from devmap. */  in dasd_delete_device()
845 	devmap = dasd_find_busid(dev_name(&device->cdev->dev));  in dasd_delete_device()
848 	if (devmap->device != device) {  in dasd_delete_device()
850 		dasd_put_device(device);  in dasd_delete_device()
853 	devmap->device = NULL;  in dasd_delete_device()
857 	spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);  in dasd_delete_device()
858 	dev_set_drvdata(&device->cdev->dev, NULL);  in dasd_delete_device()
859 	spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);  in dasd_delete_device()
862 	dasd_devmap_delete_copy_relation_device(device);  in dasd_delete_device()
867 	atomic_sub(3, &device->ref_count);  in dasd_delete_device()
870 	wait_event(dasd_delete_wq, atomic_read(&device->ref_count) == 0);  in dasd_delete_device()
872 	dasd_generic_free_discipline(device);  in dasd_delete_device()
874 	kset_unregister(device->paths_info);  in dasd_delete_device()
877 	cdev = device->cdev;  in dasd_delete_device()
878 	device->cdev = NULL;  in dasd_delete_device()
883 	/* Now the device structure can be freed. */  in dasd_delete_device()
884 	dasd_free_device(device);  in dasd_delete_device()
892 dasd_put_device_wake(struct dasd_device *device)  in dasd_put_device_wake()  argument
900  * This function needs to be called with the ccw device
906 	struct dasd_device *device = dev_get_drvdata(&cdev->dev);  in dasd_device_from_cdev_locked()  local
908 	if (!device)  in dasd_device_from_cdev_locked()
910 	dasd_get_device(device);  in dasd_device_from_cdev_locked()
911 	return device;  in dasd_device_from_cdev_locked()
920 	struct dasd_device *device;  in dasd_device_from_cdev()  local
924 	device = dasd_device_from_cdev_locked(cdev);  in dasd_device_from_cdev()
926 	return device;  in dasd_device_from_cdev()
929 void dasd_add_link_to_gendisk(struct gendisk *gdp, struct dasd_device *device)  in dasd_add_link_to_gendisk()  argument
933 	devmap = dasd_find_busid(dev_name(&device->cdev->dev));  in dasd_add_link_to_gendisk()
944 	struct dasd_device *device;  in dasd_device_from_gendisk()  local
949 	device = NULL;  in dasd_device_from_gendisk()
952 	if (devmap && devmap->device) {  in dasd_device_from_gendisk()
953 		device = devmap->device;  in dasd_device_from_gendisk()
954 		dasd_get_device(device);  in dasd_device_from_gendisk()
957 	return device;  in dasd_device_from_gendisk()
967 static ssize_t dasd_ff_show(struct device *dev, struct device_attribute *attr,  in dasd_ff_show()
981 static ssize_t dasd_ff_store(struct device *dev, struct device_attribute *attr,  in dasd_ff_store()
1001 dasd_ro_show(struct device *dev, struct device_attribute *attr, char *buf)  in dasd_ro_show()
1004 	struct dasd_device *device;  in dasd_ro_show()  local
1014 	device = devmap->device;  in dasd_ro_show()
1015 	if (device)  in dasd_ro_show()
1016 		ro_flag |= test_bit(DASD_FLAG_DEVICE_RO, &device->flags);  in dasd_ro_show()
1024 dasd_ro_store(struct device *dev, struct device_attribute *attr,  in dasd_ro_store()
1028 	struct dasd_device *device;  in dasd_ro_store()  local
1040 	device = dasd_device_from_cdev(cdev);  in dasd_ro_store()
1041 	if (IS_ERR(device))  in dasd_ro_store()
1045 	val = val || test_bit(DASD_FLAG_DEVICE_RO, &device->flags);  in dasd_ro_store()
1047 	if (!device->block || !device->block->gdp ||  in dasd_ro_store()
1048 	    test_bit(DASD_FLAG_OFFLINE, &device->flags)) {  in dasd_ro_store()
1052 	/* Increase open_count to avoid losing the block device */  in dasd_ro_store()
1053 	atomic_inc(&device->block->open_count);  in dasd_ro_store()
1056 	set_disk_ro(device->block->gdp, val);  in dasd_ro_store()
1057 	atomic_dec(&device->block->open_count);  in dasd_ro_store()
1060 	dasd_put_device(device);  in dasd_ro_store()
1071 dasd_erplog_show(struct device *dev, struct device_attribute *attr, char *buf)  in dasd_erplog_show()
1085 dasd_erplog_store(struct device *dev, struct device_attribute *attr,  in dasd_erplog_store()
1103  * to talk to the device
1106 dasd_use_diag_show(struct device *dev, struct device_attribute *attr, char *buf)  in dasd_use_diag_show()
1120 dasd_use_diag_store(struct device *dev, struct device_attribute *attr,  in dasd_use_diag_store()
1137 	if (!devmap->device && !(devmap->features & DASD_FEATURE_USERAW)) {  in dasd_use_diag_store()
1155 dasd_use_raw_show(struct device *dev, struct device_attribute *attr, char *buf)  in dasd_use_raw_show()
1169 dasd_use_raw_store(struct device *dev, struct device_attribute *attr,  in dasd_use_raw_store()
1186 	if (!devmap->device && !(devmap->features & DASD_FEATURE_USEDIAG)) {  in dasd_use_raw_store()
1201 dasd_safe_offline_store(struct device *dev, struct device_attribute *attr,  in dasd_safe_offline_store()
1205 	struct dasd_device *device;  in dasd_safe_offline_store()  local
1210 	device = dasd_device_from_cdev_locked(cdev);  in dasd_safe_offline_store()
1211 	if (IS_ERR(device)) {  in dasd_safe_offline_store()
1212 		rc = PTR_ERR(device);  in dasd_safe_offline_store()
1217 	if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||  in dasd_safe_offline_store()
1218 	    test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) {  in dasd_safe_offline_store()
1220 		dasd_put_device(device);  in dasd_safe_offline_store()
1226 	set_bit(DASD_FLAG_SAFE_OFFLINE, &device->flags);  in dasd_safe_offline_store()
1227 	dasd_put_device(device);  in dasd_safe_offline_store()
1239 dasd_access_show(struct device *dev, struct device_attribute *attr,  in dasd_access_show()
1243 	struct dasd_device *device;  in dasd_access_show()  local
1246 	device = dasd_device_from_cdev(cdev);  in dasd_access_show()
1247 	if (IS_ERR(device))  in dasd_access_show()
1248 		return PTR_ERR(device);  in dasd_access_show()
1250 	if (!device->discipline)  in dasd_access_show()
1252 	else if (!device->discipline->host_access_count)  in dasd_access_show()
1255 		count = device->discipline->host_access_count(device);  in dasd_access_show()
1257 	dasd_put_device(device);  in dasd_access_show()
1267 dasd_discipline_show(struct device *dev, struct device_attribute *attr,  in dasd_discipline_show()
1270 	struct dasd_device *device;  in dasd_discipline_show()  local
1273 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_discipline_show()
1274 	if (IS_ERR(device))  in dasd_discipline_show()
1276 	else if (!device->discipline) {  in dasd_discipline_show()
1277 		dasd_put_device(device);  in dasd_discipline_show()
1281 				 device->discipline->name);  in dasd_discipline_show()
1282 		dasd_put_device(device);  in dasd_discipline_show()
1293 dasd_device_status_show(struct device *dev, struct device_attribute *attr,  in dasd_device_status_show()
1296 	struct dasd_device *device;  in dasd_device_status_show()  local
1299 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_device_status_show()
1300 	if (!IS_ERR(device)) {  in dasd_device_status_show()
1301 		switch (device->state) {  in dasd_device_status_show()
1324 		dasd_put_device(device);  in dasd_device_status_show()
1332 static ssize_t dasd_alias_show(struct device *dev,  in dasd_alias_show()
1335 	struct dasd_device *device;  in dasd_alias_show()  local
1338 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_alias_show()
1339 	if (IS_ERR(device))  in dasd_alias_show()
1342 	if (device->discipline && device->discipline->get_uid &&  in dasd_alias_show()
1343 	    !device->discipline->get_uid(device, &uid)) {  in dasd_alias_show()
1346 			dasd_put_device(device);  in dasd_alias_show()
1350 	dasd_put_device(device);  in dasd_alias_show()
1357 static ssize_t dasd_vendor_show(struct device *dev,  in dasd_vendor_show()
1360 	struct dasd_device *device;  in dasd_vendor_show()  local
1364 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_vendor_show()
1366 	if (IS_ERR(device))  in dasd_vendor_show()
1369 	if (device->discipline && device->discipline->get_uid &&  in dasd_vendor_show()
1370 	    !device->discipline->get_uid(device, &uid))  in dasd_vendor_show()
1373 	dasd_put_device(device);  in dasd_vendor_show()
1385 dasd_uid_show(struct device *dev, struct device_attribute *attr, char *buf)  in dasd_uid_show()
1387 	struct dasd_device *device;  in dasd_uid_show()  local
1392 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_uid_show()
1394 	if (IS_ERR(device))  in dasd_uid_show()
1397 	if (device->discipline && device->discipline->get_uid &&  in dasd_uid_show()
1398 	    !device->discipline->get_uid(device, &uid)) {  in dasd_uid_show()
1412 			/* should not happen, treat like base device */  in dasd_uid_show()
1428 	dasd_put_device(device);  in dasd_uid_show()
1438 dasd_eer_show(struct device *dev, struct device_attribute *attr, char *buf)  in dasd_eer_show()
1444 	if (!IS_ERR(devmap) && devmap->device)  in dasd_eer_show()
1445 		eer_flag = dasd_eer_enabled(devmap->device);  in dasd_eer_show()
1452 dasd_eer_store(struct device *dev, struct device_attribute *attr,  in dasd_eer_store()
1455 	struct dasd_device *device;  in dasd_eer_store()  local
1459 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_eer_store()
1460 	if (IS_ERR(device))  in dasd_eer_store()
1461 		return PTR_ERR(device);  in dasd_eer_store()
1467 		rc = dasd_eer_enable(device);  in dasd_eer_store()
1469 		dasd_eer_disable(device);  in dasd_eer_store()
1471 	dasd_put_device(device);  in dasd_eer_store()
1482 dasd_expires_show(struct device *dev, struct device_attribute *attr, char *buf)  in dasd_expires_show()
1484 	struct dasd_device *device;  in dasd_expires_show()  local
1487 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_expires_show()
1488 	if (IS_ERR(device))  in dasd_expires_show()
1490 	len = sysfs_emit(buf, "%lu\n", device->default_expires);  in dasd_expires_show()
1491 	dasd_put_device(device);  in dasd_expires_show()
1496 dasd_expires_store(struct device *dev, struct device_attribute *attr,  in dasd_expires_store()
1499 	struct dasd_device *device;  in dasd_expires_store()  local
1502 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_expires_store()
1503 	if (IS_ERR(device))  in dasd_expires_store()
1508 		dasd_put_device(device);  in dasd_expires_store()
1513 		device->default_expires = val;  in dasd_expires_store()
1515 	dasd_put_device(device);  in dasd_expires_store()
1522 dasd_retries_show(struct device *dev, struct device_attribute *attr, char *buf)  in dasd_retries_show()
1524 	struct dasd_device *device;  in dasd_retries_show()  local
1527 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_retries_show()
1528 	if (IS_ERR(device))  in dasd_retries_show()
1530 	len = sysfs_emit(buf, "%lu\n", device->default_retries);  in dasd_retries_show()
1531 	dasd_put_device(device);  in dasd_retries_show()
1536 dasd_retries_store(struct device *dev, struct device_attribute *attr,  in dasd_retries_store()
1539 	struct dasd_device *device;  in dasd_retries_store()  local
1542 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_retries_store()
1543 	if (IS_ERR(device))  in dasd_retries_store()
1548 		dasd_put_device(device);  in dasd_retries_store()
1553 		device->default_retries = val;  in dasd_retries_store()
1555 	dasd_put_device(device);  in dasd_retries_store()
1562 dasd_timeout_show(struct device *dev, struct device_attribute *attr,  in dasd_timeout_show()
1565 	struct dasd_device *device;  in dasd_timeout_show()  local
1568 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_timeout_show()
1569 	if (IS_ERR(device))  in dasd_timeout_show()
1571 	len = sysfs_emit(buf, "%lu\n", device->blk_timeout);  in dasd_timeout_show()
1572 	dasd_put_device(device);  in dasd_timeout_show()
1577 dasd_timeout_store(struct device *dev, struct device_attribute *attr,  in dasd_timeout_store()
1580 	struct dasd_device *device;  in dasd_timeout_store()  local
1583 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_timeout_store()
1584 	if (IS_ERR(device) || !device->block)  in dasd_timeout_store()
1589 		dasd_put_device(device);  in dasd_timeout_store()
1592 	if (!device->block->gdp) {  in dasd_timeout_store()
1593 		dasd_put_device(device);  in dasd_timeout_store()
1597 	device->blk_timeout = val;  in dasd_timeout_store()
1598 	blk_queue_rq_timeout(device->block->gdp->queue, val * HZ);  in dasd_timeout_store()
1600 	dasd_put_device(device);  in dasd_timeout_store()
1609 dasd_path_reset_store(struct device *dev, struct device_attribute *attr,  in dasd_path_reset_store()
1612 	struct dasd_device *device;  in dasd_path_reset_store()  local
1615 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_path_reset_store()
1616 	if (IS_ERR(device))  in dasd_path_reset_store()
1622 	if (device->discipline && device->discipline->reset_path)  in dasd_path_reset_store()
1623 		device->discipline->reset_path(device, (__u8) val);  in dasd_path_reset_store()
1625 	dasd_put_device(device);  in dasd_path_reset_store()
1631 static ssize_t dasd_hpf_show(struct device *dev, struct device_attribute *attr,  in dasd_hpf_show()
1634 	struct dasd_device *device;  in dasd_hpf_show()  local
1637 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_hpf_show()
1638 	if (IS_ERR(device))  in dasd_hpf_show()
1640 	if (!device->discipline || !device->discipline->hpf_enabled) {  in dasd_hpf_show()
1641 		dasd_put_device(device);  in dasd_hpf_show()
1644 	hpf = device->discipline->hpf_enabled(device);  in dasd_hpf_show()
1645 	dasd_put_device(device);  in dasd_hpf_show()
1651 static ssize_t dasd_reservation_policy_show(struct device *dev,  in dasd_reservation_policy_show()
1672 static ssize_t dasd_reservation_policy_store(struct device *dev,  in dasd_reservation_policy_store()
1692 static ssize_t dasd_reservation_state_show(struct device *dev,  in dasd_reservation_state_show()
1696 	struct dasd_device *device;  in dasd_reservation_state_show()  local
1699 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_reservation_state_show()
1700 	if (IS_ERR(device))  in dasd_reservation_state_show()
1703 	if (test_bit(DASD_FLAG_IS_RESERVED, &device->flags))  in dasd_reservation_state_show()
1705 	else if (test_bit(DASD_FLAG_LOCK_STOLEN, &device->flags))  in dasd_reservation_state_show()
1709 	dasd_put_device(device);  in dasd_reservation_state_show()
1713 static ssize_t dasd_reservation_state_store(struct device *dev,  in dasd_reservation_state_store()
1717 	struct dasd_device *device;  in dasd_reservation_state_store()  local
1720 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_reservation_state_store()
1721 	if (IS_ERR(device))  in dasd_reservation_state_store()
1724 		clear_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);  in dasd_reservation_state_store()
1727 	dasd_put_device(device);  in dasd_reservation_state_store()
1738 static ssize_t dasd_pm_show(struct device *dev,  in dasd_pm_show()
1741 	struct dasd_device *device;  in dasd_pm_show()  local
1744 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_pm_show()
1745 	if (IS_ERR(device))  in dasd_pm_show()
1748 	opm = dasd_path_get_opm(device);  in dasd_pm_show()
1749 	nppm = dasd_path_get_nppm(device);  in dasd_pm_show()
1750 	cablepm = dasd_path_get_cablepm(device);  in dasd_pm_show()
1751 	cuirpm = dasd_path_get_cuirpm(device);  in dasd_pm_show()
1752 	hpfpm = dasd_path_get_hpfpm(device);  in dasd_pm_show()
1753 	ifccpm = dasd_path_get_ifccpm(device);  in dasd_pm_show()
1754 	dasd_put_device(device);  in dasd_pm_show()
1766 dasd_path_threshold_show(struct device *dev,  in dasd_path_threshold_show()
1769 	struct dasd_device *device;  in dasd_path_threshold_show()  local
1772 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_path_threshold_show()
1773 	if (IS_ERR(device))  in dasd_path_threshold_show()
1775 	len = sysfs_emit(buf, "%lu\n", device->path_thrhld);  in dasd_path_threshold_show()
1776 	dasd_put_device(device);  in dasd_path_threshold_show()
1781 dasd_path_threshold_store(struct device *dev, struct device_attribute *attr,  in dasd_path_threshold_store()
1784 	struct dasd_device *device;  in dasd_path_threshold_store()  local
1788 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_path_threshold_store()
1789 	if (IS_ERR(device))  in dasd_path_threshold_store()
1793 		dasd_put_device(device);  in dasd_path_threshold_store()
1797 	device->path_thrhld = val;  in dasd_path_threshold_store()
1799 	dasd_put_device(device);  in dasd_path_threshold_store()
1810 dasd_path_autodisable_show(struct device *dev,  in dasd_path_autodisable_show()
1826 dasd_path_autodisable_store(struct device *dev,  in dasd_path_autodisable_store()
1851 dasd_path_interval_show(struct device *dev,  in dasd_path_interval_show()
1854 	struct dasd_device *device;  in dasd_path_interval_show()  local
1857 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_path_interval_show()
1858 	if (IS_ERR(device))  in dasd_path_interval_show()
1860 	len = sysfs_emit(buf, "%lu\n", device->path_interval);  in dasd_path_interval_show()
1861 	dasd_put_device(device);  in dasd_path_interval_show()
1866 dasd_path_interval_store(struct device *dev, struct device_attribute *attr,  in dasd_path_interval_store()
1869 	struct dasd_device *device;  in dasd_path_interval_store()  local
1873 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_path_interval_store()
1874 	if (IS_ERR(device))  in dasd_path_interval_store()
1879 		dasd_put_device(device);  in dasd_path_interval_store()
1884 		device->path_interval = val;  in dasd_path_interval_store()
1886 	dasd_put_device(device);  in dasd_path_interval_store()
1894 dasd_device_fcs_show(struct device *dev, struct device_attribute *attr,  in dasd_device_fcs_show()
1897 	struct dasd_device *device;  in dasd_device_fcs_show()  local
1901 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_device_fcs_show()
1902 	if (IS_ERR(device))  in dasd_device_fcs_show()
1904 	fc_sec = dasd_path_get_fcs_device(device);  in dasd_device_fcs_show()
1909 	dasd_put_device(device);  in dasd_device_fcs_show()
1932 dasd_copy_pair_show(struct device *dev,  in dasd_copy_pair_show()
2029 static int dasd_devmap_clear_copy_relation(struct device *dev)  in dasd_devmap_clear_copy_relation()
2049 		if (copy->entry[i].device == copy->active->device)  in dasd_devmap_clear_copy_relation()
2052 		if (copy->entry[i].device)  in dasd_devmap_clear_copy_relation()
2059 		if (copy->entry[i].device) {  in dasd_devmap_clear_copy_relation()
2060 			dasd_put_device(copy->entry[i].device);  in dasd_devmap_clear_copy_relation()
2061 			copy->entry[i].device->copy = NULL;  in dasd_devmap_clear_copy_relation()
2062 			copy->entry[i].device = NULL;  in dasd_devmap_clear_copy_relation()
2114 static ssize_t dasd_copy_pair_store(struct device *dev,  in dasd_copy_pair_store()
2122 	struct dasd_device *device;  in dasd_copy_pair_store()  local
2151 	if (sec_devmap->device)  in dasd_copy_pair_store()
2176 	/* if primary device is already online call device setup directly */  in dasd_copy_pair_store()
2177 	if (prim_devmap->device && !prim_devmap->device->copy) {  in dasd_copy_pair_store()
2178 		device = prim_devmap->device;  in dasd_copy_pair_store()
2179 		if (device->discipline->pprc_enabled) {  in dasd_copy_pair_store()
2180 			pprc_enabled = device->discipline->pprc_enabled(device);  in dasd_copy_pair_store()
2181 			rc = dasd_devmap_set_device_copy_relation(device->cdev,  in dasd_copy_pair_store()
2199 dasd_copy_role_show(struct device *dev,  in dasd_copy_role_show()
2203 	struct dasd_device *device;  in dasd_copy_role_show()  local
2206 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_copy_role_show()
2207 	if (IS_ERR(device))  in dasd_copy_role_show()
2210 	if (!device->copy) {  in dasd_copy_role_show()
2214 	copy = device->copy;  in dasd_copy_role_show()
2215 	/* only the active device is primary */  in dasd_copy_role_show()
2216 	if (copy->active->device == device) {  in dasd_copy_role_show()
2221 		if (copy->entry[i].device == device) {  in dasd_copy_role_show()
2229 	dasd_put_device(device);  in dasd_copy_role_show()
2234 static ssize_t dasd_device_ping(struct device *dev,  in dasd_device_ping()
2238 	struct dasd_device *device;  in dasd_device_ping()  local
2241 	device = dasd_device_from_cdev(to_ccwdev(dev));  in dasd_device_ping()
2242 	if (IS_ERR(device))  in dasd_device_ping()
2251 	if (test_bit(DASD_FLAG_OFFLINE, &device->flags)) {  in dasd_device_ping()
2255 	if (!device->discipline || !device->discipline->device_ping) {  in dasd_device_ping()
2259 	rc = device->discipline->device_ping(device);  in dasd_device_ping()
2263 	dasd_put_device(device);  in dasd_device_ping()
2269 static ssize_t dasd_##_name##_show(struct device *dev,			\
2274 	struct dasd_device *device = dasd_device_from_cdev(cdev);	\
2277 	if (IS_ERR(device))						\
2279 	if (device->discipline && _func)				\
2280 		val = _func(device);					\
2281 	dasd_put_device(device);					\
2287 DASD_DEFINE_ATTR(ese, device->discipline->is_ese);
2288 DASD_DEFINE_ATTR(extent_size, device->discipline->ext_size);
2289 DASD_DEFINE_ATTR(pool_id, device->discipline->ext_pool_id);
2290 DASD_DEFINE_ATTR(space_configured, device->discipline->space_configured);
2291 DASD_DEFINE_ATTR(space_allocated, device->discipline->space_allocated);
2292 DASD_DEFINE_ATTR(logical_capacity, device->discipline->logical_capacity);
2293 DASD_DEFINE_ATTR(warn_threshold, device->discipline->ext_pool_warn_thrshld);
2294 DASD_DEFINE_ATTR(cap_at_warnlevel, device->discipline->ext_pool_cap_at_warnlevel);
2295 DASD_DEFINE_ATTR(pool_oos, device->discipline->ext_pool_oos);
2401 	if (devmap->device)  in dasd_set_feature()
2402 		devmap->device->features = devmap->features;  in dasd_set_feature()
2420 static void dasd_path_init_kobj(struct dasd_device *device, int chp)  in dasd_path_init_kobj()  argument
2422 	device->path[chp].kobj.kset = device->paths_info;  in dasd_path_init_kobj()
2423 	kobject_init(&device->path[chp].kobj, &path_attr_type);  in dasd_path_init_kobj()
2426 void dasd_path_create_kobj(struct dasd_device *device, int chp)  in dasd_path_create_kobj()  argument
2430 	if (test_bit(DASD_FLAG_OFFLINE, &device->flags))  in dasd_path_create_kobj()
2432 	if (!device->paths_info) {  in dasd_path_create_kobj()
2433 		dev_warn(&device->cdev->dev, "Unable to create paths objects\n");  in dasd_path_create_kobj()
2436 	if (device->path[chp].in_sysfs)  in dasd_path_create_kobj()
2438 	if (!device->path[chp].conf_data)  in dasd_path_create_kobj()
2441 	dasd_path_init_kobj(device, chp);  in dasd_path_create_kobj()
2443 	rc = kobject_add(&device->path[chp].kobj, NULL, "%x.%02x",  in dasd_path_create_kobj()
2444 			 device->path[chp].cssid, device->path[chp].chpid);  in dasd_path_create_kobj()
2446 		kobject_put(&device->path[chp].kobj);  in dasd_path_create_kobj()
2447 	device->path[chp].in_sysfs = true;  in dasd_path_create_kobj()
2451 void dasd_path_create_kobjects(struct dasd_device *device)  in dasd_path_create_kobjects()  argument
2455 	opm = dasd_path_get_opm(device);  in dasd_path_create_kobjects()
2459 		dasd_path_create_kobj(device, pathmask_to_pos(lpm));  in dasd_path_create_kobjects()
2464 static void dasd_path_remove_kobj(struct dasd_device *device, int chp)  in dasd_path_remove_kobj()  argument
2466 	if (device->path[chp].in_sysfs) {  in dasd_path_remove_kobj()
2467 		kobject_put(&device->path[chp].kobj);  in dasd_path_remove_kobj()
2468 		device->path[chp].in_sysfs = false;  in dasd_path_remove_kobj()
2473  * As we keep kobjects for the lifetime of a device, this function must not be
2474  * called anywhere but in the context of offlining a device.
2476 void dasd_path_remove_kobjects(struct dasd_device *device)  in dasd_path_remove_kobjects()  argument
2481 		dasd_path_remove_kobj(device, i);  in dasd_path_remove_kobjects()