/*
- * This file is part of the zfcp device driver for
- * FCP adapters for IBM System z9 and zSeries.
+ * zfcp device driver
*
- * (C) Copyright IBM Corp. 2002, 2006
+ * Registration and callback for the s390 common I/O layer.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Copyright IBM Corporation 2002, 2008
*/
-#include "zfcp_ext.h"
-
-#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
-
-static int zfcp_ccw_probe(struct ccw_device *);
-static void zfcp_ccw_remove(struct ccw_device *);
-static int zfcp_ccw_set_online(struct ccw_device *);
-static int zfcp_ccw_set_offline(struct ccw_device *);
-static int zfcp_ccw_notify(struct ccw_device *, int);
-static void zfcp_ccw_shutdown(struct device *);
-
-static struct ccw_device_id zfcp_ccw_device_id[] = {
- {CCW_DEVICE_DEVTYPE(ZFCP_CONTROL_UNIT_TYPE,
- ZFCP_CONTROL_UNIT_MODEL,
- ZFCP_DEVICE_TYPE,
- ZFCP_DEVICE_MODEL)},
- {CCW_DEVICE_DEVTYPE(ZFCP_CONTROL_UNIT_TYPE,
- ZFCP_CONTROL_UNIT_MODEL,
- ZFCP_DEVICE_TYPE,
- ZFCP_DEVICE_MODEL_PRIV)},
- {},
-};
-
-static struct ccw_driver zfcp_ccw_driver = {
- .owner = THIS_MODULE,
- .name = ZFCP_NAME,
- .ids = zfcp_ccw_device_id,
- .probe = zfcp_ccw_probe,
- .remove = zfcp_ccw_remove,
- .set_online = zfcp_ccw_set_online,
- .set_offline = zfcp_ccw_set_offline,
- .notify = zfcp_ccw_notify,
- .driver = {
- .shutdown = zfcp_ccw_shutdown,
- },
-};
+#define KMSG_COMPONENT "zfcp"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
-MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id);
+#include "zfcp_ext.h"
/**
* zfcp_ccw_probe - probe function of zfcp driver
* In addition the nameserver port will be added to the ports of the adapter
* and its sysfs representation will be created too.
*/
-static int
-zfcp_ccw_probe(struct ccw_device *ccw_device)
+static int zfcp_ccw_probe(struct ccw_device *ccw_device)
{
- struct zfcp_adapter *adapter;
int retval = 0;
down(&zfcp_data.config_sema);
- adapter = zfcp_adapter_enqueue(ccw_device);
- if (!adapter)
+ if (zfcp_adapter_enqueue(ccw_device)) {
+ dev_err(&ccw_device->dev,
+ "Setting up data structures for the "
+ "FCP adapter failed\n");
retval = -EINVAL;
- else
- ZFCP_LOG_DEBUG("Probed adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
+ }
up(&zfcp_data.config_sema);
return retval;
}
* ports that belong to this adapter. And in addition all resources of this
* adapter will be freed too.
*/
-static void
-zfcp_ccw_remove(struct ccw_device *ccw_device)
+static void zfcp_ccw_remove(struct ccw_device *ccw_device)
{
struct zfcp_adapter *adapter;
struct zfcp_port *port, *p;
struct zfcp_unit *unit, *u;
+ LIST_HEAD(unit_remove_lh);
+ LIST_HEAD(port_remove_lh);
ccw_device_set_offline(ccw_device);
down(&zfcp_data.config_sema);
adapter = dev_get_drvdata(&ccw_device->dev);
- ZFCP_LOG_DEBUG("Removing adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
write_lock_irq(&zfcp_data.config_lock);
list_for_each_entry_safe(port, p, &adapter->port_list_head, list) {
list_for_each_entry_safe(unit, u, &port->unit_list_head, list) {
- list_move(&unit->list, &port->unit_remove_lh);
+ list_move(&unit->list, &unit_remove_lh);
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE,
&unit->status);
}
- list_move(&port->list, &adapter->port_remove_lh);
+ list_move(&port->list, &port_remove_lh);
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
}
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
write_unlock_irq(&zfcp_data.config_lock);
- list_for_each_entry_safe(port, p, &adapter->port_remove_lh, list) {
- list_for_each_entry_safe(unit, u, &port->unit_remove_lh, list) {
+ list_for_each_entry_safe(port, p, &port_remove_lh, list) {
+ list_for_each_entry_safe(unit, u, &unit_remove_lh, list) {
+ if (unit->device)
+ scsi_remove_device(unit->device);
zfcp_unit_dequeue(unit);
}
zfcp_port_dequeue(port);
}
- zfcp_adapter_wait(adapter);
+ wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0);
zfcp_adapter_dequeue(adapter);
up(&zfcp_data.config_sema);
* registered with the SCSI stack, that the QDIO queues will be set up
* and that the adapter will be opened (asynchronously).
*/
-static int
-zfcp_ccw_set_online(struct ccw_device *ccw_device)
+static int zfcp_ccw_set_online(struct ccw_device *ccw_device)
{
struct zfcp_adapter *adapter;
int retval;
down(&zfcp_data.config_sema);
adapter = dev_get_drvdata(&ccw_device->dev);
- retval = zfcp_adapter_debug_register(adapter);
+ retval = zfcp_erp_thread_setup(adapter);
if (retval)
goto out;
- retval = zfcp_erp_thread_setup(adapter);
- if (retval) {
- ZFCP_LOG_INFO("error: start of error recovery thread for "
- "adapter %s failed\n",
- zfcp_get_busid_by_adapter(adapter));
- goto out_erp_thread;
- }
- retval = zfcp_adapter_scsi_register(adapter);
- if (retval)
- goto out_scsi_register;
- zfcp_erp_modify_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING,
- ZFCP_SET);
- zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED);
+ /* initialize request counter */
+ BUG_ON(!zfcp_reqlist_isempty(adapter));
+ adapter->req_no = 0;
+
+ zfcp_erp_modify_adapter_status(adapter, 10, NULL,
+ ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
+ zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 85,
+ NULL);
zfcp_erp_wait(adapter);
- goto out;
+ up(&zfcp_data.config_sema);
+ flush_work(&adapter->scan_work);
+ return 0;
- out_scsi_register:
- zfcp_erp_thread_kill(adapter);
- out_erp_thread:
- zfcp_adapter_debug_unregister(adapter);
out:
up(&zfcp_data.config_sema);
return retval;
* @ccw_device: pointer to belonging ccw device
*
* This function gets called by the common i/o layer and sets an adapter
- * into state offline. Setting an fcp device offline means that it will be
- * unregistered from the SCSI stack and that the adapter will be shut down
- * asynchronously.
+ * into state offline.
*/
-static int
-zfcp_ccw_set_offline(struct ccw_device *ccw_device)
+static int zfcp_ccw_set_offline(struct ccw_device *ccw_device)
{
struct zfcp_adapter *adapter;
down(&zfcp_data.config_sema);
adapter = dev_get_drvdata(&ccw_device->dev);
- zfcp_erp_adapter_shutdown(adapter, 0);
+ zfcp_erp_adapter_shutdown(adapter, 0, 86, NULL);
zfcp_erp_wait(adapter);
- zfcp_adapter_scsi_unregister(adapter);
zfcp_erp_thread_kill(adapter);
- zfcp_adapter_debug_unregister(adapter);
up(&zfcp_data.config_sema);
return 0;
}
/**
- * zfcp_ccw_notify
+ * zfcp_ccw_notify - ccw notify function
* @ccw_device: pointer to belonging ccw device
* @event: indicates if adapter was detached or attached
*
* This function gets called by the common i/o layer if an adapter has gone
* or reappeared.
*/
-static int
-zfcp_ccw_notify(struct ccw_device *ccw_device, int event)
+static int zfcp_ccw_notify(struct ccw_device *ccw_device, int event)
{
- struct zfcp_adapter *adapter;
+ struct zfcp_adapter *adapter = dev_get_drvdata(&ccw_device->dev);
- down(&zfcp_data.config_sema);
- adapter = dev_get_drvdata(&ccw_device->dev);
switch (event) {
case CIO_GONE:
- ZFCP_LOG_NORMAL("adapter %s: device gone\n",
- zfcp_get_busid_by_adapter(adapter));
- debug_text_event(adapter->erp_dbf,1,"dev_gone");
- zfcp_erp_adapter_shutdown(adapter, 0);
+ dev_warn(&adapter->ccw_device->dev,
+ "The FCP device has been detached\n");
+ zfcp_erp_adapter_shutdown(adapter, 0, 87, NULL);
break;
case CIO_NO_PATH:
- ZFCP_LOG_NORMAL("adapter %s: no path\n",
- zfcp_get_busid_by_adapter(adapter));
- debug_text_event(adapter->erp_dbf,1,"no_path");
- zfcp_erp_adapter_shutdown(adapter, 0);
+ dev_warn(&adapter->ccw_device->dev,
+ "The CHPID for the FCP device is offline\n");
+ zfcp_erp_adapter_shutdown(adapter, 0, 88, NULL);
break;
case CIO_OPER:
- ZFCP_LOG_NORMAL("adapter %s: operational again\n",
- zfcp_get_busid_by_adapter(adapter));
- debug_text_event(adapter->erp_dbf,1,"dev_oper");
- zfcp_erp_modify_adapter_status(adapter,
+ dev_info(&adapter->ccw_device->dev,
+ "The FCP device is operational again\n");
+ zfcp_erp_modify_adapter_status(adapter, 11, NULL,
ZFCP_STATUS_COMMON_RUNNING,
ZFCP_SET);
- zfcp_erp_adapter_reopen(adapter,
- ZFCP_STATUS_COMMON_ERP_FAILED);
+ zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
+ 89, NULL);
break;
}
- zfcp_erp_wait(adapter);
- up(&zfcp_data.config_sema);
return 1;
}
/**
- * zfcp_ccw_register - ccw register function
- *
- * Registers the driver at the common i/o layer. This function will be called
- * at module load time/system start.
+ * zfcp_ccw_shutdown - handle shutdown from cio
+ * @cdev: device for adapter to shutdown.
*/
-int __init
-zfcp_ccw_register(void)
+static void zfcp_ccw_shutdown(struct ccw_device *cdev)
{
- int retval;
+ struct zfcp_adapter *adapter;
- retval = ccw_driver_register(&zfcp_ccw_driver);
- if (retval)
- goto out;
- retval = zfcp_sysfs_driver_create_files(&zfcp_ccw_driver.driver);
- if (retval)
- ccw_driver_unregister(&zfcp_ccw_driver);
- out:
- return retval;
+ down(&zfcp_data.config_sema);
+ adapter = dev_get_drvdata(&cdev->dev);
+ zfcp_erp_adapter_shutdown(adapter, 0, 90, NULL);
+ zfcp_erp_wait(adapter);
+ up(&zfcp_data.config_sema);
}
+static struct ccw_device_id zfcp_ccw_device_id[] = {
+ { CCW_DEVICE_DEVTYPE(0x1731, 0x3, 0x1732, 0x3) },
+ { CCW_DEVICE_DEVTYPE(0x1731, 0x3, 0x1732, 0x4) }, /* priv. */
+ {},
+};
+
+MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id);
+
+static struct ccw_driver zfcp_ccw_driver = {
+ .owner = THIS_MODULE,
+ .name = "zfcp",
+ .ids = zfcp_ccw_device_id,
+ .probe = zfcp_ccw_probe,
+ .remove = zfcp_ccw_remove,
+ .set_online = zfcp_ccw_set_online,
+ .set_offline = zfcp_ccw_set_offline,
+ .notify = zfcp_ccw_notify,
+ .shutdown = zfcp_ccw_shutdown,
+};
+
/**
- * zfcp_ccw_unregister - ccw unregister function
+ * zfcp_ccw_register - ccw register function
*
- * Unregisters the driver from common i/o layer. Function will be called at
- * module unload/system shutdown.
+ * Registers the driver at the common i/o layer. This function will be called
+ * at module load time/system start.
*/
-void __exit
-zfcp_ccw_unregister(void)
+int __init zfcp_ccw_register(void)
{
- zfcp_sysfs_driver_remove_files(&zfcp_ccw_driver.driver);
- ccw_driver_unregister(&zfcp_ccw_driver);
+ return ccw_driver_register(&zfcp_ccw_driver);
}
/**
- * zfcp_ccw_shutdown - gets called on reboot/shutdown
- *
- * Makes sure that QDIO queues are down when the system gets stopped.
+ * zfcp_get_adapter_by_busid - find zfcp_adapter struct
+ * @busid: bus id string of zfcp adapter to find
*/
-static void
-zfcp_ccw_shutdown(struct device *dev)
+struct zfcp_adapter *zfcp_get_adapter_by_busid(char *busid)
{
- struct zfcp_adapter *adapter;
+ struct ccw_device *ccw_device;
+ struct zfcp_adapter *adapter = NULL;
- down(&zfcp_data.config_sema);
- adapter = dev_get_drvdata(dev);
- zfcp_erp_adapter_shutdown(adapter, 0);
- zfcp_erp_wait(adapter);
- up(&zfcp_data.config_sema);
+ ccw_device = get_ccwdev_by_busid(&zfcp_ccw_driver, busid);
+ if (ccw_device) {
+ adapter = dev_get_drvdata(&ccw_device->dev);
+ put_device(&ccw_device->dev);
+ }
+ return adapter;
}
-
-#undef ZFCP_LOG_AREA