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 000000000000..0fc46381fc22
--- /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