4 * Registration and callback for the s390 common I/O layer.
6 * Copyright IBM Corporation 2002, 2008
12 * zfcp_ccw_probe - probe function of zfcp driver
13 * @ccw_device: pointer to belonging ccw device
15 * This function gets called by the common i/o layer and sets up the initial
16 * data structures for each fcp adapter, which was detected by the system.
17 * Also the sysfs files for this adapter will be created by this function.
18 * In addition the nameserver port will be added to the ports of the adapter
19 * and its sysfs representation will be created too.
21 static int zfcp_ccw_probe(struct ccw_device *ccw_device)
23 struct zfcp_adapter *adapter;
26 down(&zfcp_data.config_sema);
27 adapter = zfcp_adapter_enqueue(ccw_device);
29 dev_err(&ccw_device->dev,
30 "Setup of data structures failed.\n");
33 up(&zfcp_data.config_sema);
38 * zfcp_ccw_remove - remove function of zfcp driver
39 * @ccw_device: pointer to belonging ccw device
41 * This function gets called by the common i/o layer and removes an adapter
42 * from the system. Task of this function is to get rid of all units and
43 * ports that belong to this adapter. And in addition all resources of this
44 * adapter will be freed too.
46 static void zfcp_ccw_remove(struct ccw_device *ccw_device)
48 struct zfcp_adapter *adapter;
49 struct zfcp_port *port, *p;
50 struct zfcp_unit *unit, *u;
52 ccw_device_set_offline(ccw_device);
53 down(&zfcp_data.config_sema);
54 adapter = dev_get_drvdata(&ccw_device->dev);
56 write_lock_irq(&zfcp_data.config_lock);
57 list_for_each_entry_safe(port, p, &adapter->port_list_head, list) {
58 list_for_each_entry_safe(unit, u, &port->unit_list_head, list) {
59 list_move(&unit->list, &port->unit_remove_lh);
60 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE,
63 list_move(&port->list, &adapter->port_remove_lh);
64 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
66 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
67 write_unlock_irq(&zfcp_data.config_lock);
69 list_for_each_entry_safe(port, p, &adapter->port_remove_lh, list) {
70 list_for_each_entry_safe(unit, u, &port->unit_remove_lh, list) {
71 if (atomic_test_mask(ZFCP_STATUS_UNIT_REGISTERED,
73 scsi_remove_device(unit->device);
74 zfcp_unit_dequeue(unit);
76 zfcp_port_dequeue(port);
78 zfcp_adapter_wait(adapter);
79 zfcp_adapter_dequeue(adapter);
81 up(&zfcp_data.config_sema);
85 * zfcp_ccw_set_online - set_online function of zfcp driver
86 * @ccw_device: pointer to belonging ccw device
88 * This function gets called by the common i/o layer and sets an adapter
89 * into state online. Setting an fcp device online means that it will be
90 * registered with the SCSI stack, that the QDIO queues will be set up
91 * and that the adapter will be opened (asynchronously).
93 static int zfcp_ccw_set_online(struct ccw_device *ccw_device)
95 struct zfcp_adapter *adapter;
98 down(&zfcp_data.config_sema);
99 adapter = dev_get_drvdata(&ccw_device->dev);
101 retval = zfcp_erp_thread_setup(adapter);
105 retval = zfcp_adapter_scsi_register(adapter);
107 goto out_scsi_register;
109 /* initialize request counter */
110 BUG_ON(!zfcp_reqlist_isempty(adapter));
113 zfcp_erp_modify_adapter_status(adapter, 10, NULL,
114 ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
115 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 85,
117 zfcp_erp_wait(adapter);
121 zfcp_erp_thread_kill(adapter);
123 up(&zfcp_data.config_sema);
128 * zfcp_ccw_set_offline - set_offline function of zfcp driver
129 * @ccw_device: pointer to belonging ccw device
131 * This function gets called by the common i/o layer and sets an adapter
132 * into state offline.
134 static int zfcp_ccw_set_offline(struct ccw_device *ccw_device)
136 struct zfcp_adapter *adapter;
138 down(&zfcp_data.config_sema);
139 adapter = dev_get_drvdata(&ccw_device->dev);
140 zfcp_erp_adapter_shutdown(adapter, 0, 86, NULL);
141 zfcp_erp_wait(adapter);
142 zfcp_erp_thread_kill(adapter);
143 up(&zfcp_data.config_sema);
148 * zfcp_ccw_notify - ccw notify function
149 * @ccw_device: pointer to belonging ccw device
150 * @event: indicates if adapter was detached or attached
152 * This function gets called by the common i/o layer if an adapter has gone
155 static int zfcp_ccw_notify(struct ccw_device *ccw_device, int event)
157 struct zfcp_adapter *adapter;
159 down(&zfcp_data.config_sema);
160 adapter = dev_get_drvdata(&ccw_device->dev);
163 dev_warn(&adapter->ccw_device->dev, "device gone\n");
164 zfcp_erp_adapter_shutdown(adapter, 0, 87, NULL);
167 dev_warn(&adapter->ccw_device->dev, "no path\n");
168 zfcp_erp_adapter_shutdown(adapter, 0, 88, NULL);
171 dev_info(&adapter->ccw_device->dev, "operational again\n");
172 zfcp_erp_modify_adapter_status(adapter, 11, NULL,
173 ZFCP_STATUS_COMMON_RUNNING,
175 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
179 zfcp_erp_wait(adapter);
180 up(&zfcp_data.config_sema);
185 * zfcp_ccw_shutdown - handle shutdown from cio
186 * @cdev: device for adapter to shutdown.
188 static void zfcp_ccw_shutdown(struct ccw_device *cdev)
190 struct zfcp_adapter *adapter;
192 down(&zfcp_data.config_sema);
193 adapter = dev_get_drvdata(&cdev->dev);
194 zfcp_erp_adapter_shutdown(adapter, 0, 90, NULL);
195 zfcp_erp_wait(adapter);
196 up(&zfcp_data.config_sema);
199 static struct ccw_device_id zfcp_ccw_device_id[] = {
200 { CCW_DEVICE_DEVTYPE(0x1731, 0x3, 0x1732, 0x3) },
201 { CCW_DEVICE_DEVTYPE(0x1731, 0x3, 0x1732, 0x4) }, /* priv. */
205 MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id);
207 static struct ccw_driver zfcp_ccw_driver = {
208 .owner = THIS_MODULE,
210 .ids = zfcp_ccw_device_id,
211 .probe = zfcp_ccw_probe,
212 .remove = zfcp_ccw_remove,
213 .set_online = zfcp_ccw_set_online,
214 .set_offline = zfcp_ccw_set_offline,
215 .notify = zfcp_ccw_notify,
216 .shutdown = zfcp_ccw_shutdown,
220 * zfcp_ccw_register - ccw register function
222 * Registers the driver at the common i/o layer. This function will be called
223 * at module load time/system start.
225 int __init zfcp_ccw_register(void)
227 return ccw_driver_register(&zfcp_ccw_driver);