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 | * |
6d1a27f6 | 6 | * Copyright IBM Corporation 2002, 2009 |
1da177e4 LT |
7 | */ |
8 | ||
ecf39d42 CS |
9 | #define KMSG_COMPONENT "zfcp" |
10 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
11 | ||
1da177e4 LT |
12 | #include "zfcp_ext.h" |
13 | ||
6fcf41d1 CS |
14 | #define ZFCP_MODEL_PRIV 0x4 |
15 | ||
daa70fa9 MP |
16 | static int zfcp_ccw_suspend(struct ccw_device *cdev) |
17 | ||
18 | { | |
19 | struct zfcp_adapter *adapter = dev_get_drvdata(&cdev->dev); | |
20 | ||
143bb6bf CS |
21 | if (!adapter) |
22 | return 0; | |
23 | ||
24680def | 24 | mutex_lock(&zfcp_data.config_mutex); |
daa70fa9 MP |
25 | |
26 | zfcp_erp_adapter_shutdown(adapter, 0, "ccsusp1", NULL); | |
27 | zfcp_erp_wait(adapter); | |
28 | ||
24680def | 29 | mutex_unlock(&zfcp_data.config_mutex); |
daa70fa9 MP |
30 | |
31 | return 0; | |
32 | } | |
33 | ||
34 | static int zfcp_ccw_activate(struct ccw_device *cdev) | |
35 | ||
36 | { | |
37 | struct zfcp_adapter *adapter = dev_get_drvdata(&cdev->dev); | |
38 | ||
143bb6bf CS |
39 | if (!adapter) |
40 | return 0; | |
41 | ||
daa70fa9 MP |
42 | zfcp_erp_modify_adapter_status(adapter, "ccresu1", NULL, |
43 | ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); | |
44 | zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, | |
45 | "ccresu2", NULL); | |
46 | zfcp_erp_wait(adapter); | |
47 | flush_work(&adapter->scan_work); | |
48 | ||
49 | return 0; | |
50 | } | |
51 | ||
6fcf41d1 CS |
52 | static struct ccw_device_id zfcp_ccw_device_id[] = { |
53 | { CCW_DEVICE_DEVTYPE(0x1731, 0x3, 0x1732, 0x3) }, | |
54 | { CCW_DEVICE_DEVTYPE(0x1731, 0x3, 0x1732, ZFCP_MODEL_PRIV) }, | |
55 | {}, | |
56 | }; | |
57 | MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id); | |
58 | ||
59 | /** | |
60 | * zfcp_ccw_priv_sch - check if subchannel is privileged | |
61 | * @adapter: Adapter/Subchannel to check | |
62 | */ | |
63 | int zfcp_ccw_priv_sch(struct zfcp_adapter *adapter) | |
64 | { | |
65 | return adapter->ccw_device->id.dev_model == ZFCP_MODEL_PRIV; | |
66 | } | |
67 | ||
1da177e4 LT |
68 | /** |
69 | * zfcp_ccw_probe - probe function of zfcp driver | |
70 | * @ccw_device: pointer to belonging ccw device | |
71 | * | |
143bb6bf CS |
72 | * This function gets called by the common i/o layer for each FCP |
73 | * device found on the current system. This is only a stub to make cio | |
74 | * work: To only allocate adapter resources for devices actually used, | |
75 | * the allocation is deferred to the first call to ccw_set_online. | |
1da177e4 | 76 | */ |
fa04c281 | 77 | static int zfcp_ccw_probe(struct ccw_device *ccw_device) |
1da177e4 | 78 | { |
143bb6bf | 79 | return 0; |
1da177e4 LT |
80 | } |
81 | ||
82 | /** | |
83 | * zfcp_ccw_remove - remove 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 removes an adapter | |
87 | * from the system. Task of this function is to get rid of all units and | |
88 | * ports that belong to this adapter. And in addition all resources of this | |
89 | * adapter will be freed too. | |
90 | */ | |
fa04c281 | 91 | static void zfcp_ccw_remove(struct ccw_device *ccw_device) |
1da177e4 LT |
92 | { |
93 | struct zfcp_adapter *adapter; | |
94 | struct zfcp_port *port, *p; | |
95 | struct zfcp_unit *unit, *u; | |
0406289e CS |
96 | LIST_HEAD(unit_remove_lh); |
97 | LIST_HEAD(port_remove_lh); | |
1da177e4 LT |
98 | |
99 | ccw_device_set_offline(ccw_device); | |
143bb6bf | 100 | |
24680def | 101 | mutex_lock(&zfcp_data.config_mutex); |
1da177e4 | 102 | adapter = dev_get_drvdata(&ccw_device->dev); |
143bb6bf CS |
103 | if (!adapter) |
104 | goto out; | |
1da177e4 | 105 | |
1da177e4 LT |
106 | write_lock_irq(&zfcp_data.config_lock); |
107 | list_for_each_entry_safe(port, p, &adapter->port_list_head, list) { | |
108 | list_for_each_entry_safe(unit, u, &port->unit_list_head, list) { | |
0406289e | 109 | list_move(&unit->list, &unit_remove_lh); |
1da177e4 LT |
110 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, |
111 | &unit->status); | |
112 | } | |
0406289e | 113 | list_move(&port->list, &port_remove_lh); |
1da177e4 LT |
114 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status); |
115 | } | |
116 | atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); | |
117 | write_unlock_irq(&zfcp_data.config_lock); | |
118 | ||
0406289e CS |
119 | list_for_each_entry_safe(port, p, &port_remove_lh, list) { |
120 | list_for_each_entry_safe(unit, u, &unit_remove_lh, list) { | |
86f8a1b4 | 121 | if (unit->device) |
e39c8877 | 122 | scsi_remove_device(unit->device); |
1da177e4 LT |
123 | zfcp_unit_dequeue(unit); |
124 | } | |
125 | zfcp_port_dequeue(port); | |
126 | } | |
44cc76f2 | 127 | wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0); |
1da177e4 LT |
128 | zfcp_adapter_dequeue(adapter); |
129 | ||
143bb6bf | 130 | out: |
24680def | 131 | mutex_unlock(&zfcp_data.config_mutex); |
1da177e4 LT |
132 | } |
133 | ||
134 | /** | |
135 | * zfcp_ccw_set_online - set_online function of zfcp driver | |
136 | * @ccw_device: pointer to belonging ccw device | |
137 | * | |
143bb6bf CS |
138 | * This function gets called by the common i/o layer and sets an |
139 | * adapter into state online. The first call will allocate all | |
140 | * adapter resources that will be retained until the device is removed | |
141 | * via zfcp_ccw_remove. | |
142 | * | |
143 | * Setting an fcp device online means that it will be registered with | |
144 | * the SCSI stack, that the QDIO queues will be set up and that the | |
145 | * adapter will be opened. | |
1da177e4 | 146 | */ |
fa04c281 | 147 | static int zfcp_ccw_set_online(struct ccw_device *ccw_device) |
1da177e4 LT |
148 | { |
149 | struct zfcp_adapter *adapter; | |
143bb6bf | 150 | int ret = 0; |
1da177e4 | 151 | |
24680def | 152 | mutex_lock(&zfcp_data.config_mutex); |
1da177e4 LT |
153 | adapter = dev_get_drvdata(&ccw_device->dev); |
154 | ||
143bb6bf CS |
155 | if (!adapter) { |
156 | ret = zfcp_adapter_enqueue(ccw_device); | |
157 | if (ret) { | |
158 | dev_err(&ccw_device->dev, | |
159 | "Setting up data structures for the " | |
160 | "FCP adapter failed\n"); | |
161 | goto out; | |
162 | } | |
163 | adapter = dev_get_drvdata(&ccw_device->dev); | |
164 | } | |
1da177e4 | 165 | |
fea9d6c7 VS |
166 | /* initialize request counter */ |
167 | BUG_ON(!zfcp_reqlist_isempty(adapter)); | |
168 | adapter->req_no = 0; | |
169 | ||
5ffd51a5 | 170 | zfcp_erp_modify_adapter_status(adapter, "ccsonl1", NULL, |
698ec016 | 171 | ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); |
5ffd51a5 SS |
172 | zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, |
173 | "ccsonl2", NULL); | |
1da177e4 | 174 | zfcp_erp_wait(adapter); |
143bb6bf | 175 | out: |
24680def | 176 | mutex_unlock(&zfcp_data.config_mutex); |
143bb6bf CS |
177 | if (!ret) |
178 | flush_work(&adapter->scan_work); | |
179 | return ret; | |
1da177e4 LT |
180 | } |
181 | ||
182 | /** | |
183 | * zfcp_ccw_set_offline - set_offline function of zfcp driver | |
184 | * @ccw_device: pointer to belonging ccw device | |
185 | * | |
186 | * This function gets called by the common i/o layer and sets an adapter | |
9f28745a | 187 | * into state offline. |
1da177e4 | 188 | */ |
fa04c281 | 189 | static int zfcp_ccw_set_offline(struct ccw_device *ccw_device) |
1da177e4 LT |
190 | { |
191 | struct zfcp_adapter *adapter; | |
192 | ||
24680def | 193 | mutex_lock(&zfcp_data.config_mutex); |
1da177e4 | 194 | adapter = dev_get_drvdata(&ccw_device->dev); |
143bb6bf CS |
195 | if (!adapter) |
196 | goto out; | |
197 | ||
5ffd51a5 | 198 | zfcp_erp_adapter_shutdown(adapter, 0, "ccsoff1", NULL); |
1da177e4 | 199 | zfcp_erp_wait(adapter); |
24680def | 200 | mutex_unlock(&zfcp_data.config_mutex); |
143bb6bf | 201 | out: |
1da177e4 LT |
202 | return 0; |
203 | } | |
204 | ||
205 | /** | |
fa04c281 | 206 | * zfcp_ccw_notify - ccw notify function |
1da177e4 LT |
207 | * @ccw_device: pointer to belonging ccw device |
208 | * @event: indicates if adapter was detached or attached | |
209 | * | |
210 | * This function gets called by the common i/o layer if an adapter has gone | |
211 | * or reappeared. | |
212 | */ | |
fa04c281 | 213 | static int zfcp_ccw_notify(struct ccw_device *ccw_device, int event) |
1da177e4 | 214 | { |
f48bf7fb | 215 | struct zfcp_adapter *adapter = dev_get_drvdata(&ccw_device->dev); |
1da177e4 | 216 | |
1da177e4 LT |
217 | switch (event) { |
218 | case CIO_GONE: | |
ff3b24fa CS |
219 | dev_warn(&adapter->ccw_device->dev, |
220 | "The FCP device has been detached\n"); | |
5ffd51a5 | 221 | zfcp_erp_adapter_shutdown(adapter, 0, "ccnoti1", NULL); |
1da177e4 LT |
222 | break; |
223 | case CIO_NO_PATH: | |
ff3b24fa CS |
224 | dev_warn(&adapter->ccw_device->dev, |
225 | "The CHPID for the FCP device is offline\n"); | |
5ffd51a5 | 226 | zfcp_erp_adapter_shutdown(adapter, 0, "ccnoti2", NULL); |
1da177e4 LT |
227 | break; |
228 | case CIO_OPER: | |
ff3b24fa CS |
229 | dev_info(&adapter->ccw_device->dev, |
230 | "The FCP device is operational again\n"); | |
5ffd51a5 | 231 | zfcp_erp_modify_adapter_status(adapter, "ccnoti3", NULL, |
1da177e4 LT |
232 | ZFCP_STATUS_COMMON_RUNNING, |
233 | ZFCP_SET); | |
1f6f7129 | 234 | zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, |
5ffd51a5 | 235 | "ccnoti4", NULL); |
1da177e4 | 236 | break; |
47593bfa | 237 | case CIO_BOXED: |
955a2155 CS |
238 | dev_warn(&adapter->ccw_device->dev, "The FCP device " |
239 | "did not respond within the specified time\n"); | |
47593bfa SO |
240 | zfcp_erp_adapter_shutdown(adapter, 0, "ccnoti5", NULL); |
241 | break; | |
1da177e4 | 242 | } |
1da177e4 LT |
243 | return 1; |
244 | } | |
245 | ||
246 | /** | |
fa04c281 CS |
247 | * zfcp_ccw_shutdown - handle shutdown from cio |
248 | * @cdev: device for adapter to shutdown. | |
1da177e4 | 249 | */ |
fa04c281 | 250 | static void zfcp_ccw_shutdown(struct ccw_device *cdev) |
1da177e4 LT |
251 | { |
252 | struct zfcp_adapter *adapter; | |
253 | ||
24680def | 254 | mutex_lock(&zfcp_data.config_mutex); |
958974fb | 255 | adapter = dev_get_drvdata(&cdev->dev); |
5ffd51a5 | 256 | zfcp_erp_adapter_shutdown(adapter, 0, "ccshut1", NULL); |
1da177e4 | 257 | zfcp_erp_wait(adapter); |
143bb6bf | 258 | zfcp_erp_thread_kill(adapter); |
24680def | 259 | mutex_unlock(&zfcp_data.config_mutex); |
1da177e4 LT |
260 | } |
261 | ||
c5afd81e | 262 | struct ccw_driver zfcp_ccw_driver = { |
fa04c281 CS |
263 | .owner = THIS_MODULE, |
264 | .name = "zfcp", | |
265 | .ids = zfcp_ccw_device_id, | |
266 | .probe = zfcp_ccw_probe, | |
267 | .remove = zfcp_ccw_remove, | |
268 | .set_online = zfcp_ccw_set_online, | |
269 | .set_offline = zfcp_ccw_set_offline, | |
270 | .notify = zfcp_ccw_notify, | |
271 | .shutdown = zfcp_ccw_shutdown, | |
daa70fa9 MP |
272 | .freeze = zfcp_ccw_suspend, |
273 | .thaw = zfcp_ccw_activate, | |
274 | .restore = zfcp_ccw_activate, | |
fa04c281 CS |
275 | }; |
276 | ||
277 | /** | |
278 | * zfcp_ccw_register - ccw register function | |
279 | * | |
280 | * Registers the driver at the common i/o layer. This function will be called | |
281 | * at module load time/system start. | |
282 | */ | |
283 | int __init zfcp_ccw_register(void) | |
284 | { | |
285 | return ccw_driver_register(&zfcp_ccw_driver); | |
286 | } |