9b73e76f3c
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (200 commits) [SCSI] usbstorage: use last_sector_bug flag universally [SCSI] libsas: abstract STP task status into a function [SCSI] ultrastor: clean up inline asm warnings [SCSI] aic7xxx: fix firmware build [SCSI] aacraid: fib context lock for management ioctls [SCSI] ch: remove forward declarations [SCSI] ch: fix device minor number management bug [SCSI] ch: handle class_device_create failure properly [SCSI] NCR5380: fix section mismatch [SCSI] sg: fix /proc/scsi/sg/devices when no SCSI devices [SCSI] IB/iSER: add logical unit reset support [SCSI] don't use __GFP_DMA for sense buffers if not required [SCSI] use dynamically allocated sense buffer [SCSI] scsi.h: add macro for enclosure bit of inquiry data [SCSI] sd: add fix for devices with last sector access problems [SCSI] fix pcmcia compile problem [SCSI] aacraid: add Voodoo Lite class of cards. [SCSI] aacraid: add new driver features flags [SCSI] qla2xxx: Update version number to 8.02.00-k7. [SCSI] qla2xxx: Issue correct MBC_INITIALIZE_FIRMWARE command. ...
281 lines
8.0 KiB
C
281 lines
8.0 KiB
C
/*
|
|
* This file is part of the zfcp device driver for
|
|
* FCP adapters for IBM System z9 and zSeries.
|
|
*
|
|
* (C) Copyright IBM Corp. 2002, 2006
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#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 ccw_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,
|
|
.shutdown = zfcp_ccw_shutdown,
|
|
.driver = {
|
|
.groups = zfcp_driver_attr_groups,
|
|
},
|
|
};
|
|
|
|
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) {
|
|
if (atomic_test_mask(ZFCP_STATUS_UNIT_REGISTERED,
|
|
&unit->status))
|
|
scsi_remove_device(unit->device);
|
|
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_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;
|
|
}
|
|
|
|
retval = zfcp_adapter_scsi_register(adapter);
|
|
if (retval)
|
|
goto out_scsi_register;
|
|
|
|
/* initialize request counter */
|
|
BUG_ON(!zfcp_reqlist_isempty(adapter));
|
|
adapter->req_no = 0;
|
|
|
|
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:
|
|
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.
|
|
*/
|
|
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_erp_thread_kill(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)
|
|
{
|
|
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.
|
|
*/
|
|
static void
|
|
zfcp_ccw_shutdown(struct ccw_device *cdev)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
|
|
down(&zfcp_data.config_sema);
|
|
adapter = dev_get_drvdata(&cdev->dev);
|
|
zfcp_erp_adapter_shutdown(adapter, 0);
|
|
zfcp_erp_wait(adapter);
|
|
up(&zfcp_data.config_sema);
|
|
}
|
|
|
|
#undef ZFCP_LOG_AREA
|