Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
fa04c281 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
fa04c281 | 4 | * Registration and callback for the s390 common I/O layer. |
1da177e4 | 5 | * |
fa04c281 | 6 | * Copyright IBM Corporation 2002, 2008 |
1da177e4 LT |
7 | */ |
8 | ||
1da177e4 LT |
9 | #include "zfcp_ext.h" |
10 | ||
1da177e4 LT |
11 | /** |
12 | * zfcp_ccw_probe - probe function of zfcp driver | |
13 | * @ccw_device: pointer to belonging ccw device | |
14 | * | |
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. | |
20 | */ | |
fa04c281 | 21 | static int zfcp_ccw_probe(struct ccw_device *ccw_device) |
1da177e4 | 22 | { |
1da177e4 LT |
23 | int retval = 0; |
24 | ||
25 | down(&zfcp_data.config_sema); | |
317e6b65 | 26 | if (zfcp_adapter_enqueue(ccw_device)) { |
fa04c281 CS |
27 | dev_err(&ccw_device->dev, |
28 | "Setup of data structures failed.\n"); | |
1da177e4 | 29 | retval = -EINVAL; |
fa04c281 | 30 | } |
1da177e4 LT |
31 | up(&zfcp_data.config_sema); |
32 | return retval; | |
33 | } | |
34 | ||
35 | /** | |
36 | * zfcp_ccw_remove - remove function of zfcp driver | |
37 | * @ccw_device: pointer to belonging ccw device | |
38 | * | |
39 | * This function gets called by the common i/o layer and removes an adapter | |
40 | * from the system. Task of this function is to get rid of all units and | |
41 | * ports that belong to this adapter. And in addition all resources of this | |
42 | * adapter will be freed too. | |
43 | */ | |
fa04c281 | 44 | static void zfcp_ccw_remove(struct ccw_device *ccw_device) |
1da177e4 LT |
45 | { |
46 | struct zfcp_adapter *adapter; | |
47 | struct zfcp_port *port, *p; | |
48 | struct zfcp_unit *unit, *u; | |
49 | ||
50 | ccw_device_set_offline(ccw_device); | |
51 | down(&zfcp_data.config_sema); | |
52 | adapter = dev_get_drvdata(&ccw_device->dev); | |
53 | ||
1da177e4 LT |
54 | write_lock_irq(&zfcp_data.config_lock); |
55 | list_for_each_entry_safe(port, p, &adapter->port_list_head, list) { | |
56 | list_for_each_entry_safe(unit, u, &port->unit_list_head, list) { | |
57 | list_move(&unit->list, &port->unit_remove_lh); | |
58 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, | |
59 | &unit->status); | |
60 | } | |
61 | list_move(&port->list, &adapter->port_remove_lh); | |
62 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); | |
63 | } | |
64 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); | |
65 | write_unlock_irq(&zfcp_data.config_lock); | |
66 | ||
67 | list_for_each_entry_safe(port, p, &adapter->port_remove_lh, list) { | |
68 | list_for_each_entry_safe(unit, u, &port->unit_remove_lh, list) { | |
e39c8877 CS |
69 | if (atomic_test_mask(ZFCP_STATUS_UNIT_REGISTERED, |
70 | &unit->status)) | |
71 | scsi_remove_device(unit->device); | |
1da177e4 LT |
72 | zfcp_unit_dequeue(unit); |
73 | } | |
74 | zfcp_port_dequeue(port); | |
75 | } | |
76 | zfcp_adapter_wait(adapter); | |
77 | zfcp_adapter_dequeue(adapter); | |
78 | ||
79 | up(&zfcp_data.config_sema); | |
80 | } | |
81 | ||
82 | /** | |
83 | * zfcp_ccw_set_online - set_online function of zfcp driver | |
84 | * @ccw_device: pointer to belonging ccw device | |
85 | * | |
86 | * This function gets called by the common i/o layer and sets an adapter | |
87 | * into state online. Setting an fcp device online means that it will be | |
88 | * registered with the SCSI stack, that the QDIO queues will be set up | |
89 | * and that the adapter will be opened (asynchronously). | |
90 | */ | |
fa04c281 | 91 | static int zfcp_ccw_set_online(struct ccw_device *ccw_device) |
1da177e4 LT |
92 | { |
93 | struct zfcp_adapter *adapter; | |
94 | int retval; | |
95 | ||
96 | down(&zfcp_data.config_sema); | |
97 | adapter = dev_get_drvdata(&ccw_device->dev); | |
98 | ||
1da177e4 | 99 | retval = zfcp_erp_thread_setup(adapter); |
fa04c281 | 100 | if (retval) |
ff17a29d | 101 | goto out; |
1da177e4 LT |
102 | |
103 | retval = zfcp_adapter_scsi_register(adapter); | |
104 | if (retval) | |
105 | goto out_scsi_register; | |
fea9d6c7 VS |
106 | |
107 | /* initialize request counter */ | |
108 | BUG_ON(!zfcp_reqlist_isempty(adapter)); | |
109 | adapter->req_no = 0; | |
110 | ||
1f6f7129 | 111 | zfcp_erp_modify_adapter_status(adapter, 10, NULL, |
698ec016 | 112 | ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); |
1f6f7129 MP |
113 | zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 85, |
114 | NULL); | |
1da177e4 LT |
115 | zfcp_erp_wait(adapter); |
116 | goto out; | |
117 | ||
118 | out_scsi_register: | |
119 | zfcp_erp_thread_kill(adapter); | |
1da177e4 LT |
120 | out: |
121 | up(&zfcp_data.config_sema); | |
122 | return retval; | |
123 | } | |
124 | ||
125 | /** | |
126 | * zfcp_ccw_set_offline - set_offline function of zfcp driver | |
127 | * @ccw_device: pointer to belonging ccw device | |
128 | * | |
129 | * This function gets called by the common i/o layer and sets an adapter | |
9f28745a | 130 | * into state offline. |
1da177e4 | 131 | */ |
fa04c281 | 132 | static int zfcp_ccw_set_offline(struct ccw_device *ccw_device) |
1da177e4 LT |
133 | { |
134 | struct zfcp_adapter *adapter; | |
135 | ||
136 | down(&zfcp_data.config_sema); | |
137 | adapter = dev_get_drvdata(&ccw_device->dev); | |
1f6f7129 | 138 | zfcp_erp_adapter_shutdown(adapter, 0, 86, NULL); |
1da177e4 | 139 | zfcp_erp_wait(adapter); |
1da177e4 | 140 | zfcp_erp_thread_kill(adapter); |
1da177e4 LT |
141 | up(&zfcp_data.config_sema); |
142 | return 0; | |
143 | } | |
144 | ||
145 | /** | |
fa04c281 | 146 | * zfcp_ccw_notify - ccw notify function |
1da177e4 LT |
147 | * @ccw_device: pointer to belonging ccw device |
148 | * @event: indicates if adapter was detached or attached | |
149 | * | |
150 | * This function gets called by the common i/o layer if an adapter has gone | |
151 | * or reappeared. | |
152 | */ | |
fa04c281 | 153 | static int zfcp_ccw_notify(struct ccw_device *ccw_device, int event) |
1da177e4 LT |
154 | { |
155 | struct zfcp_adapter *adapter; | |
156 | ||
157 | down(&zfcp_data.config_sema); | |
158 | adapter = dev_get_drvdata(&ccw_device->dev); | |
159 | switch (event) { | |
160 | case CIO_GONE: | |
fa04c281 | 161 | dev_warn(&adapter->ccw_device->dev, "device gone\n"); |
1f6f7129 | 162 | zfcp_erp_adapter_shutdown(adapter, 0, 87, NULL); |
1da177e4 LT |
163 | break; |
164 | case CIO_NO_PATH: | |
fa04c281 | 165 | dev_warn(&adapter->ccw_device->dev, "no path\n"); |
1f6f7129 | 166 | zfcp_erp_adapter_shutdown(adapter, 0, 88, NULL); |
1da177e4 LT |
167 | break; |
168 | case CIO_OPER: | |
fa04c281 | 169 | dev_info(&adapter->ccw_device->dev, "operational again\n"); |
1f6f7129 | 170 | zfcp_erp_modify_adapter_status(adapter, 11, NULL, |
1da177e4 LT |
171 | ZFCP_STATUS_COMMON_RUNNING, |
172 | ZFCP_SET); | |
1f6f7129 MP |
173 | zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, |
174 | 89, NULL); | |
1da177e4 LT |
175 | break; |
176 | } | |
177 | zfcp_erp_wait(adapter); | |
178 | up(&zfcp_data.config_sema); | |
179 | return 1; | |
180 | } | |
181 | ||
182 | /** | |
fa04c281 CS |
183 | * zfcp_ccw_shutdown - handle shutdown from cio |
184 | * @cdev: device for adapter to shutdown. | |
1da177e4 | 185 | */ |
fa04c281 | 186 | static void zfcp_ccw_shutdown(struct ccw_device *cdev) |
1da177e4 LT |
187 | { |
188 | struct zfcp_adapter *adapter; | |
189 | ||
190 | down(&zfcp_data.config_sema); | |
958974fb | 191 | adapter = dev_get_drvdata(&cdev->dev); |
1f6f7129 | 192 | zfcp_erp_adapter_shutdown(adapter, 0, 90, NULL); |
1da177e4 LT |
193 | zfcp_erp_wait(adapter); |
194 | up(&zfcp_data.config_sema); | |
195 | } | |
196 | ||
fa04c281 CS |
197 | static struct ccw_device_id zfcp_ccw_device_id[] = { |
198 | { CCW_DEVICE_DEVTYPE(0x1731, 0x3, 0x1732, 0x3) }, | |
199 | { CCW_DEVICE_DEVTYPE(0x1731, 0x3, 0x1732, 0x4) }, /* priv. */ | |
200 | {}, | |
201 | }; | |
202 | ||
203 | MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id); | |
204 | ||
205 | static struct ccw_driver zfcp_ccw_driver = { | |
206 | .owner = THIS_MODULE, | |
207 | .name = "zfcp", | |
208 | .ids = zfcp_ccw_device_id, | |
209 | .probe = zfcp_ccw_probe, | |
210 | .remove = zfcp_ccw_remove, | |
211 | .set_online = zfcp_ccw_set_online, | |
212 | .set_offline = zfcp_ccw_set_offline, | |
213 | .notify = zfcp_ccw_notify, | |
214 | .shutdown = zfcp_ccw_shutdown, | |
215 | }; | |
216 | ||
217 | /** | |
218 | * zfcp_ccw_register - ccw register function | |
219 | * | |
220 | * Registers the driver at the common i/o layer. This function will be called | |
221 | * at module load time/system start. | |
222 | */ | |
223 | int __init zfcp_ccw_register(void) | |
224 | { | |
225 | return ccw_driver_register(&zfcp_ccw_driver); | |
226 | } |