1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
312 lines
8.8 KiB
C
312 lines
8.8 KiB
C
/*
|
|
* linux/drivers/s390/scsi/zfcp_ccw.c
|
|
*
|
|
* FCP adapter driver for IBM eServer zSeries
|
|
*
|
|
* CCW driver related routines
|
|
*
|
|
* (C) Copyright IBM Corp. 2003, 2004
|
|
*
|
|
* Authors:
|
|
* Martin Peschke <mpeschke@de.ibm.com>
|
|
* Heiko Carstens <heiko.carstens@de.ibm.com>
|
|
* Andreas Herrmann <aherrman@de.ibm.com>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#define ZFCP_CCW_C_REVISION "$Revision: 1.58 $"
|
|
|
|
#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,
|
|
},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id);
|
|
|
|
/**
|
|
* zfcp_ccw_probe - probe function of zfcp driver
|
|
* @ccw_device: pointer to belonging ccw device
|
|
*
|
|
* This function gets called by the common i/o layer and sets up the initial
|
|
* data structures for each fcp adapter, which was detected by the system.
|
|
* Also the sysfs files for this adapter will be created by this function.
|
|
* 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)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
int retval = 0;
|
|
|
|
down(&zfcp_data.config_sema);
|
|
adapter = zfcp_adapter_enqueue(ccw_device);
|
|
if (!adapter)
|
|
retval = -EINVAL;
|
|
else
|
|
ZFCP_LOG_DEBUG("Probed adapter %s\n",
|
|
zfcp_get_busid_by_adapter(adapter));
|
|
up(&zfcp_data.config_sema);
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* zfcp_ccw_remove - remove function of zfcp driver
|
|
* @ccw_device: pointer to belonging ccw device
|
|
*
|
|
* This function gets called by the common i/o layer and removes an adapter
|
|
* from the system. Task of this function is to get rid of all units and
|
|
* 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)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
struct zfcp_port *port, *p;
|
|
struct zfcp_unit *unit, *u;
|
|
|
|
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);
|
|
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE,
|
|
&unit->status);
|
|
}
|
|
list_move(&port->list, &adapter->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) {
|
|
zfcp_unit_dequeue(unit);
|
|
}
|
|
zfcp_port_dequeue(port);
|
|
}
|
|
zfcp_adapter_wait(adapter);
|
|
zfcp_adapter_dequeue(adapter);
|
|
|
|
up(&zfcp_data.config_sema);
|
|
}
|
|
|
|
/**
|
|
* zfcp_ccw_set_online - set_online function of zfcp driver
|
|
* @ccw_device: pointer to belonging ccw device
|
|
*
|
|
* This function gets called by the common i/o layer and sets an adapter
|
|
* into state online. Setting an fcp device online means that it will be
|
|
* 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)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
int retval;
|
|
|
|
down(&zfcp_data.config_sema);
|
|
adapter = dev_get_drvdata(&ccw_device->dev);
|
|
|
|
retval = zfcp_adapter_debug_register(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);
|
|
zfcp_erp_wait(adapter);
|
|
goto out;
|
|
|
|
out_scsi_register:
|
|
zfcp_erp_thread_kill(adapter);
|
|
out_erp_thread:
|
|
zfcp_adapter_debug_unregister(adapter);
|
|
out:
|
|
up(&zfcp_data.config_sema);
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* zfcp_ccw_set_offline - set_offline function of zfcp driver
|
|
* @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.
|
|
*/
|
|
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_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
|
|
* @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)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
|
|
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);
|
|
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);
|
|
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,
|
|
ZFCP_STATUS_COMMON_RUNNING,
|
|
ZFCP_SET);
|
|
zfcp_erp_adapter_reopen(adapter,
|
|
ZFCP_STATUS_COMMON_ERP_FAILED);
|
|
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.
|
|
*/
|
|
int __init
|
|
zfcp_ccw_register(void)
|
|
{
|
|
int retval;
|
|
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* zfcp_ccw_unregister - ccw unregister function
|
|
*
|
|
* Unregisters the driver from common i/o layer. Function will be called at
|
|
* module unload/system shutdown.
|
|
*/
|
|
void __exit
|
|
zfcp_ccw_unregister(void)
|
|
{
|
|
zfcp_sysfs_driver_remove_files(&zfcp_ccw_driver.driver);
|
|
ccw_driver_unregister(&zfcp_ccw_driver);
|
|
}
|
|
|
|
/**
|
|
* zfcp_ccw_shutdown - gets called on reboot/shutdown
|
|
*
|
|
* Makes sure that QDIO queues are down when the system gets stopped.
|
|
*/
|
|
static void
|
|
zfcp_ccw_shutdown(struct device *dev)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
|
|
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);
|
|
}
|
|
|
|
#undef ZFCP_LOG_AREA
|