Linux-2.6.12-rc2v2.6.12-rc2

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!

1 files changed, 312 insertions, 0 deletions

diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c
new file mode 100644
index 00000000000..0fc46381fc2
--- /dev/null
+++ b/drivers/s390/scsi/zfcp_ccw.c
@@ -0,0 +1,312 @@
+/*
+ * 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