Merge git://git.infradead.org/~dedekind/ubi-2.6
[linux-2.6] / drivers / s390 / cio / device_fsm.c
1 /*
2  * drivers/s390/cio/device_fsm.c
3  * finite state machine for device handling
4  *
5  *    Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
6  *                       IBM Corporation
7  *    Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)
8  *               Martin Schwidefsky (schwidefsky@de.ibm.com)
9  */
10
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/jiffies.h>
14 #include <linux/string.h>
15
16 #include <asm/ccwdev.h>
17 #include <asm/cio.h>
18 #include <asm/chpid.h>
19
20 #include "cio.h"
21 #include "cio_debug.h"
22 #include "css.h"
23 #include "device.h"
24 #include "chsc.h"
25 #include "ioasm.h"
26 #include "chp.h"
27
28 static int timeout_log_enabled;
29
30 int
31 device_is_online(struct subchannel *sch)
32 {
33         struct ccw_device *cdev;
34
35         cdev = sch_get_cdev(sch);
36         if (!cdev)
37                 return 0;
38         return (cdev->private->state == DEV_STATE_ONLINE);
39 }
40
41 int
42 device_is_disconnected(struct subchannel *sch)
43 {
44         struct ccw_device *cdev;
45
46         cdev = sch_get_cdev(sch);
47         if (!cdev)
48                 return 0;
49         return (cdev->private->state == DEV_STATE_DISCONNECTED ||
50                 cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID);
51 }
52
53 void
54 device_set_disconnected(struct subchannel *sch)
55 {
56         struct ccw_device *cdev;
57
58         cdev = sch_get_cdev(sch);
59         if (!cdev)
60                 return;
61         ccw_device_set_timeout(cdev, 0);
62         cdev->private->flags.fake_irb = 0;
63         cdev->private->state = DEV_STATE_DISCONNECTED;
64         if (cdev->online)
65                 ccw_device_schedule_recovery();
66 }
67
68 void device_set_intretry(struct subchannel *sch)
69 {
70         struct ccw_device *cdev;
71
72         cdev = sch_get_cdev(sch);
73         if (!cdev)
74                 return;
75         cdev->private->flags.intretry = 1;
76 }
77
78 int device_trigger_verify(struct subchannel *sch)
79 {
80         struct ccw_device *cdev;
81
82         cdev = sch_get_cdev(sch);
83         if (!cdev || !cdev->online)
84                 return -EINVAL;
85         dev_fsm_event(cdev, DEV_EVENT_VERIFY);
86         return 0;
87 }
88
89 static int __init ccw_timeout_log_setup(char *unused)
90 {
91         timeout_log_enabled = 1;
92         return 1;
93 }
94
95 __setup("ccw_timeout_log", ccw_timeout_log_setup);
96
97 static void ccw_timeout_log(struct ccw_device *cdev)
98 {
99         struct schib schib;
100         struct subchannel *sch;
101         struct io_subchannel_private *private;
102         int cc;
103
104         sch = to_subchannel(cdev->dev.parent);
105         private = to_io_private(sch);
106         cc = stsch(sch->schid, &schib);
107
108         printk(KERN_WARNING "cio: ccw device timeout occurred at %llx, "
109                "device information:\n", get_clock());
110         printk(KERN_WARNING "cio: orb:\n");
111         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
112                        &private->orb, sizeof(private->orb), 0);
113         printk(KERN_WARNING "cio: ccw device bus id: %s\n", cdev->dev.bus_id);
114         printk(KERN_WARNING "cio: subchannel bus id: %s\n", sch->dev.bus_id);
115         printk(KERN_WARNING "cio: subchannel lpm: %02x, opm: %02x, "
116                "vpm: %02x\n", sch->lpm, sch->opm, sch->vpm);
117
118         if ((void *)(addr_t)private->orb.cpa == &private->sense_ccw ||
119             (void *)(addr_t)private->orb.cpa == cdev->private->iccws)
120                 printk(KERN_WARNING "cio: last channel program (intern):\n");
121         else
122                 printk(KERN_WARNING "cio: last channel program:\n");
123
124         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
125                        (void *)(addr_t)private->orb.cpa,
126                        sizeof(struct ccw1), 0);
127         printk(KERN_WARNING "cio: ccw device state: %d\n",
128                cdev->private->state);
129         printk(KERN_WARNING "cio: store subchannel returned: cc=%d\n", cc);
130         printk(KERN_WARNING "cio: schib:\n");
131         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
132                        &schib, sizeof(schib), 0);
133         printk(KERN_WARNING "cio: ccw device flags:\n");
134         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
135                        &cdev->private->flags, sizeof(cdev->private->flags), 0);
136 }
137
138 /*
139  * Timeout function. It just triggers a DEV_EVENT_TIMEOUT.
140  */
141 static void
142 ccw_device_timeout(unsigned long data)
143 {
144         struct ccw_device *cdev;
145
146         cdev = (struct ccw_device *) data;
147         spin_lock_irq(cdev->ccwlock);
148         if (timeout_log_enabled)
149                 ccw_timeout_log(cdev);
150         dev_fsm_event(cdev, DEV_EVENT_TIMEOUT);
151         spin_unlock_irq(cdev->ccwlock);
152 }
153
154 /*
155  * Set timeout
156  */
157 void
158 ccw_device_set_timeout(struct ccw_device *cdev, int expires)
159 {
160         if (expires == 0) {
161                 del_timer(&cdev->private->timer);
162                 return;
163         }
164         if (timer_pending(&cdev->private->timer)) {
165                 if (mod_timer(&cdev->private->timer, jiffies + expires))
166                         return;
167         }
168         cdev->private->timer.function = ccw_device_timeout;
169         cdev->private->timer.data = (unsigned long) cdev;
170         cdev->private->timer.expires = jiffies + expires;
171         add_timer(&cdev->private->timer);
172 }
173
174 /* Kill any pending timers after machine check. */
175 void
176 device_kill_pending_timer(struct subchannel *sch)
177 {
178         struct ccw_device *cdev;
179
180         cdev = sch_get_cdev(sch);
181         if (!cdev)
182                 return;
183         ccw_device_set_timeout(cdev, 0);
184 }
185
186 /*
187  * Cancel running i/o. This is called repeatedly since halt/clear are
188  * asynchronous operations. We do one try with cio_cancel, two tries
189  * with cio_halt, 255 tries with cio_clear. If everythings fails panic.
190  * Returns 0 if device now idle, -ENODEV for device not operational and
191  * -EBUSY if an interrupt is expected (either from halt/clear or from a
192  * status pending).
193  */
194 int
195 ccw_device_cancel_halt_clear(struct ccw_device *cdev)
196 {
197         struct subchannel *sch;
198         int ret;
199
200         sch = to_subchannel(cdev->dev.parent);
201         ret = stsch(sch->schid, &sch->schib);
202         if (ret || !sch->schib.pmcw.dnv)
203                 return -ENODEV; 
204         if (!sch->schib.pmcw.ena)
205                 /* Not operational -> done. */
206                 return 0;
207         /* Stage 1: cancel io. */
208         if (!(sch->schib.scsw.actl & SCSW_ACTL_HALT_PEND) &&
209             !(sch->schib.scsw.actl & SCSW_ACTL_CLEAR_PEND)) {
210                 ret = cio_cancel(sch);
211                 if (ret != -EINVAL)
212                         return ret;
213                 /* cancel io unsuccessful. From now on it is asynchronous. */
214                 cdev->private->iretry = 3;      /* 3 halt retries. */
215         }
216         if (!(sch->schib.scsw.actl & SCSW_ACTL_CLEAR_PEND)) {
217                 /* Stage 2: halt io. */
218                 if (cdev->private->iretry) {
219                         cdev->private->iretry--;
220                         ret = cio_halt(sch);
221                         if (ret != -EBUSY)
222                                 return (ret == 0) ? -EBUSY : ret;
223                 }
224                 /* halt io unsuccessful. */
225                 cdev->private->iretry = 255;    /* 255 clear retries. */
226         }
227         /* Stage 3: clear io. */
228         if (cdev->private->iretry) {
229                 cdev->private->iretry--;
230                 ret = cio_clear (sch);
231                 return (ret == 0) ? -EBUSY : ret;
232         }
233         panic("Can't stop i/o on subchannel.\n");
234 }
235
236 static int
237 ccw_device_handle_oper(struct ccw_device *cdev)
238 {
239         struct subchannel *sch;
240
241         sch = to_subchannel(cdev->dev.parent);
242         cdev->private->flags.recog_done = 1;
243         /*
244          * Check if cu type and device type still match. If
245          * not, it is certainly another device and we have to
246          * de- and re-register.
247          */
248         if (cdev->id.cu_type != cdev->private->senseid.cu_type ||
249             cdev->id.cu_model != cdev->private->senseid.cu_model ||
250             cdev->id.dev_type != cdev->private->senseid.dev_type ||
251             cdev->id.dev_model != cdev->private->senseid.dev_model) {
252                 PREPARE_WORK(&cdev->private->kick_work,
253                              ccw_device_do_unreg_rereg);
254                 queue_work(ccw_device_work, &cdev->private->kick_work);
255                 return 0;
256         }
257         cdev->private->flags.donotify = 1;
258         return 1;
259 }
260
261 /*
262  * The machine won't give us any notification by machine check if a chpid has
263  * been varied online on the SE so we have to find out by magic (i. e. driving
264  * the channel subsystem to device selection and updating our path masks).
265  */
266 static void
267 __recover_lost_chpids(struct subchannel *sch, int old_lpm)
268 {
269         int mask, i;
270         struct chp_id chpid;
271
272         chp_id_init(&chpid);
273         for (i = 0; i<8; i++) {
274                 mask = 0x80 >> i;
275                 if (!(sch->lpm & mask))
276                         continue;
277                 if (old_lpm & mask)
278                         continue;
279                 chpid.id = sch->schib.pmcw.chpid[i];
280                 if (!chp_is_registered(chpid))
281                         css_schedule_eval_all();
282         }
283 }
284
285 /*
286  * Stop device recognition.
287  */
288 static void
289 ccw_device_recog_done(struct ccw_device *cdev, int state)
290 {
291         struct subchannel *sch;
292         int notify, old_lpm, same_dev;
293
294         sch = to_subchannel(cdev->dev.parent);
295
296         ccw_device_set_timeout(cdev, 0);
297         cio_disable_subchannel(sch);
298         /*
299          * Now that we tried recognition, we have performed device selection
300          * through ssch() and the path information is up to date.
301          */
302         old_lpm = sch->lpm;
303         stsch(sch->schid, &sch->schib);
304         sch->lpm = sch->schib.pmcw.pam & sch->opm;
305         /* Check since device may again have become not operational. */
306         if (!sch->schib.pmcw.dnv)
307                 state = DEV_STATE_NOT_OPER;
308         if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID)
309                 /* Force reprobe on all chpids. */
310                 old_lpm = 0;
311         if (sch->lpm != old_lpm)
312                 __recover_lost_chpids(sch, old_lpm);
313         if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) {
314                 if (state == DEV_STATE_NOT_OPER) {
315                         cdev->private->flags.recog_done = 1;
316                         cdev->private->state = DEV_STATE_DISCONNECTED;
317                         return;
318                 }
319                 /* Boxed devices don't need extra treatment. */
320         }
321         notify = 0;
322         same_dev = 0; /* Keep the compiler quiet... */
323         switch (state) {
324         case DEV_STATE_NOT_OPER:
325                 CIO_DEBUG(KERN_WARNING, 2,
326                           "SenseID : unknown device %04x on subchannel "
327                           "0.%x.%04x\n", cdev->private->dev_id.devno,
328                           sch->schid.ssid, sch->schid.sch_no);
329                 break;
330         case DEV_STATE_OFFLINE:
331                 if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) {
332                         same_dev = ccw_device_handle_oper(cdev);
333                         notify = 1;
334                 }
335                 /* fill out sense information */
336                 memset(&cdev->id, 0, sizeof(cdev->id));
337                 cdev->id.cu_type   = cdev->private->senseid.cu_type;
338                 cdev->id.cu_model  = cdev->private->senseid.cu_model;
339                 cdev->id.dev_type  = cdev->private->senseid.dev_type;
340                 cdev->id.dev_model = cdev->private->senseid.dev_model;
341                 if (notify) {
342                         cdev->private->state = DEV_STATE_OFFLINE;
343                         if (same_dev) {
344                                 /* Get device online again. */
345                                 ccw_device_online(cdev);
346                                 wake_up(&cdev->private->wait_q);
347                         }
348                         return;
349                 }
350                 /* Issue device info message. */
351                 CIO_DEBUG(KERN_INFO, 2,
352                           "SenseID : device 0.%x.%04x reports: "
353                           "CU  Type/Mod = %04X/%02X, Dev Type/Mod = "
354                           "%04X/%02X\n",
355                           cdev->private->dev_id.ssid,
356                           cdev->private->dev_id.devno,
357                           cdev->id.cu_type, cdev->id.cu_model,
358                           cdev->id.dev_type, cdev->id.dev_model);
359                 break;
360         case DEV_STATE_BOXED:
361                 CIO_DEBUG(KERN_WARNING, 2,
362                           "SenseID : boxed device %04x on subchannel "
363                           "0.%x.%04x\n", cdev->private->dev_id.devno,
364                           sch->schid.ssid, sch->schid.sch_no);
365                 break;
366         }
367         cdev->private->state = state;
368         io_subchannel_recog_done(cdev);
369         if (state != DEV_STATE_NOT_OPER)
370                 wake_up(&cdev->private->wait_q);
371 }
372
373 /*
374  * Function called from device_id.c after sense id has completed.
375  */
376 void
377 ccw_device_sense_id_done(struct ccw_device *cdev, int err)
378 {
379         switch (err) {
380         case 0:
381                 ccw_device_recog_done(cdev, DEV_STATE_OFFLINE);
382                 break;
383         case -ETIME:            /* Sense id stopped by timeout. */
384                 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
385                 break;
386         default:
387                 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
388                 break;
389         }
390 }
391
392 static void
393 ccw_device_oper_notify(struct work_struct *work)
394 {
395         struct ccw_device_private *priv;
396         struct ccw_device *cdev;
397         struct subchannel *sch;
398         int ret;
399         unsigned long flags;
400
401         priv = container_of(work, struct ccw_device_private, kick_work);
402         cdev = priv->cdev;
403         spin_lock_irqsave(cdev->ccwlock, flags);
404         sch = to_subchannel(cdev->dev.parent);
405         if (sch->driver && sch->driver->notify) {
406                 spin_unlock_irqrestore(cdev->ccwlock, flags);
407                 ret = sch->driver->notify(sch, CIO_OPER);
408                 spin_lock_irqsave(cdev->ccwlock, flags);
409         } else
410                 ret = 0;
411         if (ret) {
412                 /* Reenable channel measurements, if needed. */
413                 spin_unlock_irqrestore(cdev->ccwlock, flags);
414                 cmf_reenable(cdev);
415                 spin_lock_irqsave(cdev->ccwlock, flags);
416                 wake_up(&cdev->private->wait_q);
417         }
418         spin_unlock_irqrestore(cdev->ccwlock, flags);
419         if (!ret)
420                 /* Driver doesn't want device back. */
421                 ccw_device_do_unreg_rereg(work);
422 }
423
424 /*
425  * Finished with online/offline processing.
426  */
427 static void
428 ccw_device_done(struct ccw_device *cdev, int state)
429 {
430         struct subchannel *sch;
431
432         sch = to_subchannel(cdev->dev.parent);
433
434         ccw_device_set_timeout(cdev, 0);
435
436         if (state != DEV_STATE_ONLINE)
437                 cio_disable_subchannel(sch);
438
439         /* Reset device status. */
440         memset(&cdev->private->irb, 0, sizeof(struct irb));
441
442         cdev->private->state = state;
443
444
445         if (state == DEV_STATE_BOXED)
446                 CIO_DEBUG(KERN_WARNING, 2,
447                           "Boxed device %04x on subchannel %04x\n",
448                           cdev->private->dev_id.devno, sch->schid.sch_no);
449
450         if (cdev->private->flags.donotify) {
451                 cdev->private->flags.donotify = 0;
452                 PREPARE_WORK(&cdev->private->kick_work, ccw_device_oper_notify);
453                 queue_work(ccw_device_notify_work, &cdev->private->kick_work);
454         }
455         wake_up(&cdev->private->wait_q);
456
457         if (css_init_done && state != DEV_STATE_ONLINE)
458                 put_device (&cdev->dev);
459 }
460
461 static int cmp_pgid(struct pgid *p1, struct pgid *p2)
462 {
463         char *c1;
464         char *c2;
465
466         c1 = (char *)p1;
467         c2 = (char *)p2;
468
469         return memcmp(c1 + 1, c2 + 1, sizeof(struct pgid) - 1);
470 }
471
472 static void __ccw_device_get_common_pgid(struct ccw_device *cdev)
473 {
474         int i;
475         int last;
476
477         last = 0;
478         for (i = 0; i < 8; i++) {
479                 if (cdev->private->pgid[i].inf.ps.state1 == SNID_STATE1_RESET)
480                         /* No PGID yet */
481                         continue;
482                 if (cdev->private->pgid[last].inf.ps.state1 ==
483                     SNID_STATE1_RESET) {
484                         /* First non-zero PGID */
485                         last = i;
486                         continue;
487                 }
488                 if (cmp_pgid(&cdev->private->pgid[i],
489                              &cdev->private->pgid[last]) == 0)
490                         /* Non-conflicting PGIDs */
491                         continue;
492
493                 /* PGID mismatch, can't pathgroup. */
494                 CIO_MSG_EVENT(0, "SNID - pgid mismatch for device "
495                               "0.%x.%04x, can't pathgroup\n",
496                               cdev->private->dev_id.ssid,
497                               cdev->private->dev_id.devno);
498                 cdev->private->options.pgroup = 0;
499                 return;
500         }
501         if (cdev->private->pgid[last].inf.ps.state1 ==
502             SNID_STATE1_RESET)
503                 /* No previous pgid found */
504                 memcpy(&cdev->private->pgid[0],
505                        &channel_subsystems[0]->global_pgid,
506                        sizeof(struct pgid));
507         else
508                 /* Use existing pgid */
509                 memcpy(&cdev->private->pgid[0], &cdev->private->pgid[last],
510                        sizeof(struct pgid));
511 }
512
513 /*
514  * Function called from device_pgid.c after sense path ground has completed.
515  */
516 void
517 ccw_device_sense_pgid_done(struct ccw_device *cdev, int err)
518 {
519         struct subchannel *sch;
520
521         sch = to_subchannel(cdev->dev.parent);
522         switch (err) {
523         case -EOPNOTSUPP: /* path grouping not supported, use nop instead. */
524                 cdev->private->options.pgroup = 0;
525                 break;
526         case 0: /* success */
527         case -EACCES: /* partial success, some paths not operational */
528                 /* Check if all pgids are equal or 0. */
529                 __ccw_device_get_common_pgid(cdev);
530                 break;
531         case -ETIME:            /* Sense path group id stopped by timeout. */
532         case -EUSERS:           /* device is reserved for someone else. */
533                 ccw_device_done(cdev, DEV_STATE_BOXED);
534                 return;
535         default:
536                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
537                 return;
538         }
539         /* Start Path Group verification. */
540         cdev->private->state = DEV_STATE_VERIFY;
541         cdev->private->flags.doverify = 0;
542         ccw_device_verify_start(cdev);
543 }
544
545 /*
546  * Start device recognition.
547  */
548 int
549 ccw_device_recognition(struct ccw_device *cdev)
550 {
551         struct subchannel *sch;
552         int ret;
553
554         if ((cdev->private->state != DEV_STATE_NOT_OPER) &&
555             (cdev->private->state != DEV_STATE_BOXED))
556                 return -EINVAL;
557         sch = to_subchannel(cdev->dev.parent);
558         ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc,
559                                     (u32)(addr_t)sch);
560         if (ret != 0)
561                 /* Couldn't enable the subchannel for i/o. Sick device. */
562                 return ret;
563
564         /* After 60s the device recognition is considered to have failed. */
565         ccw_device_set_timeout(cdev, 60*HZ);
566
567         /*
568          * We used to start here with a sense pgid to find out whether a device
569          * is locked by someone else. Unfortunately, the sense pgid command
570          * code has other meanings on devices predating the path grouping
571          * algorithm, so we start with sense id and box the device after an
572          * timeout (or if sense pgid during path verification detects the device
573          * is locked, as may happen on newer devices).
574          */
575         cdev->private->flags.recog_done = 0;
576         cdev->private->state = DEV_STATE_SENSE_ID;
577         ccw_device_sense_id_start(cdev);
578         return 0;
579 }
580
581 /*
582  * Handle timeout in device recognition.
583  */
584 static void
585 ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event)
586 {
587         int ret;
588
589         ret = ccw_device_cancel_halt_clear(cdev);
590         switch (ret) {
591         case 0:
592                 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
593                 break;
594         case -ENODEV:
595                 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
596                 break;
597         default:
598                 ccw_device_set_timeout(cdev, 3*HZ);
599         }
600 }
601
602
603 void
604 ccw_device_verify_done(struct ccw_device *cdev, int err)
605 {
606         struct subchannel *sch;
607
608         sch = to_subchannel(cdev->dev.parent);
609         /* Update schib - pom may have changed. */
610         stsch(sch->schid, &sch->schib);
611         /* Update lpm with verified path mask. */
612         sch->lpm = sch->vpm;
613         /* Repeat path verification? */
614         if (cdev->private->flags.doverify) {
615                 cdev->private->flags.doverify = 0;
616                 ccw_device_verify_start(cdev);
617                 return;
618         }
619         switch (err) {
620         case -EOPNOTSUPP: /* path grouping not supported, just set online. */
621                 cdev->private->options.pgroup = 0;
622         case 0:
623                 ccw_device_done(cdev, DEV_STATE_ONLINE);
624                 /* Deliver fake irb to device driver, if needed. */
625                 if (cdev->private->flags.fake_irb) {
626                         memset(&cdev->private->irb, 0, sizeof(struct irb));
627                         cdev->private->irb.scsw.cc = 1;
628                         cdev->private->irb.scsw.fctl = SCSW_FCTL_START_FUNC;
629                         cdev->private->irb.scsw.actl = SCSW_ACTL_START_PEND;
630                         cdev->private->irb.scsw.stctl = SCSW_STCTL_STATUS_PEND;
631                         cdev->private->flags.fake_irb = 0;
632                         if (cdev->handler)
633                                 cdev->handler(cdev, cdev->private->intparm,
634                                               &cdev->private->irb);
635                         memset(&cdev->private->irb, 0, sizeof(struct irb));
636                 }
637                 break;
638         case -ETIME:
639                 /* Reset oper notify indication after verify error. */
640                 cdev->private->flags.donotify = 0;
641                 ccw_device_done(cdev, DEV_STATE_BOXED);
642                 break;
643         default:
644                 /* Reset oper notify indication after verify error. */
645                 cdev->private->flags.donotify = 0;
646                 if (cdev->online) {
647                         ccw_device_set_timeout(cdev, 0);
648                         dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
649                 } else
650                         ccw_device_done(cdev, DEV_STATE_NOT_OPER);
651                 break;
652         }
653 }
654
655 /*
656  * Get device online.
657  */
658 int
659 ccw_device_online(struct ccw_device *cdev)
660 {
661         struct subchannel *sch;
662         int ret;
663
664         if ((cdev->private->state != DEV_STATE_OFFLINE) &&
665             (cdev->private->state != DEV_STATE_BOXED))
666                 return -EINVAL;
667         sch = to_subchannel(cdev->dev.parent);
668         if (css_init_done && !get_device(&cdev->dev))
669                 return -ENODEV;
670         ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc,
671                                     (u32)(addr_t)sch);
672         if (ret != 0) {
673                 /* Couldn't enable the subchannel for i/o. Sick device. */
674                 if (ret == -ENODEV)
675                         dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
676                 return ret;
677         }
678         /* Do we want to do path grouping? */
679         if (!cdev->private->options.pgroup) {
680                 /* Start initial path verification. */
681                 cdev->private->state = DEV_STATE_VERIFY;
682                 cdev->private->flags.doverify = 0;
683                 ccw_device_verify_start(cdev);
684                 return 0;
685         }
686         /* Do a SensePGID first. */
687         cdev->private->state = DEV_STATE_SENSE_PGID;
688         ccw_device_sense_pgid_start(cdev);
689         return 0;
690 }
691
692 void
693 ccw_device_disband_done(struct ccw_device *cdev, int err)
694 {
695         switch (err) {
696         case 0:
697                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
698                 break;
699         case -ETIME:
700                 ccw_device_done(cdev, DEV_STATE_BOXED);
701                 break;
702         default:
703                 cdev->private->flags.donotify = 0;
704                 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
705                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
706                 break;
707         }
708 }
709
710 /*
711  * Shutdown device.
712  */
713 int
714 ccw_device_offline(struct ccw_device *cdev)
715 {
716         struct subchannel *sch;
717
718         if (ccw_device_is_orphan(cdev)) {
719                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
720                 return 0;
721         }
722         sch = to_subchannel(cdev->dev.parent);
723         if (stsch(sch->schid, &sch->schib) || !sch->schib.pmcw.dnv)
724                 return -ENODEV;
725         if (cdev->private->state != DEV_STATE_ONLINE) {
726                 if (sch->schib.scsw.actl != 0)
727                         return -EBUSY;
728                 return -EINVAL;
729         }
730         if (sch->schib.scsw.actl != 0)
731                 return -EBUSY;
732         /* Are we doing path grouping? */
733         if (!cdev->private->options.pgroup) {
734                 /* No, set state offline immediately. */
735                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
736                 return 0;
737         }
738         /* Start Set Path Group commands. */
739         cdev->private->state = DEV_STATE_DISBAND_PGID;
740         ccw_device_disband_start(cdev);
741         return 0;
742 }
743
744 /*
745  * Handle timeout in device online/offline process.
746  */
747 static void
748 ccw_device_onoff_timeout(struct ccw_device *cdev, enum dev_event dev_event)
749 {
750         int ret;
751
752         ret = ccw_device_cancel_halt_clear(cdev);
753         switch (ret) {
754         case 0:
755                 ccw_device_done(cdev, DEV_STATE_BOXED);
756                 break;
757         case -ENODEV:
758                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
759                 break;
760         default:
761                 ccw_device_set_timeout(cdev, 3*HZ);
762         }
763 }
764
765 /*
766  * Handle not oper event in device recognition.
767  */
768 static void
769 ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event)
770 {
771         ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
772 }
773
774 /*
775  * Handle not operational event in non-special state.
776  */
777 static void ccw_device_generic_notoper(struct ccw_device *cdev,
778                                        enum dev_event dev_event)
779 {
780         struct subchannel *sch;
781
782         cdev->private->state = DEV_STATE_NOT_OPER;
783         sch = to_subchannel(cdev->dev.parent);
784         css_schedule_eval(sch->schid);
785 }
786
787 /*
788  * Handle path verification event.
789  */
790 static void
791 ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
792 {
793         struct subchannel *sch;
794
795         if (cdev->private->state == DEV_STATE_W4SENSE) {
796                 cdev->private->flags.doverify = 1;
797                 return;
798         }
799         sch = to_subchannel(cdev->dev.parent);
800         /*
801          * Since we might not just be coming from an interrupt from the
802          * subchannel we have to update the schib.
803          */
804         stsch(sch->schid, &sch->schib);
805
806         if (sch->schib.scsw.actl != 0 ||
807             (sch->schib.scsw.stctl & SCSW_STCTL_STATUS_PEND) ||
808             (cdev->private->irb.scsw.stctl & SCSW_STCTL_STATUS_PEND)) {
809                 /*
810                  * No final status yet or final status not yet delivered
811                  * to the device driver. Can't do path verfication now,
812                  * delay until final status was delivered.
813                  */
814                 cdev->private->flags.doverify = 1;
815                 return;
816         }
817         /* Device is idle, we can do the path verification. */
818         cdev->private->state = DEV_STATE_VERIFY;
819         cdev->private->flags.doverify = 0;
820         ccw_device_verify_start(cdev);
821 }
822
823 /*
824  * Got an interrupt for a normal io (state online).
825  */
826 static void
827 ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event)
828 {
829         struct irb *irb;
830
831         irb = (struct irb *) __LC_IRB;
832         /* Check for unsolicited interrupt. */
833         if ((irb->scsw.stctl ==
834                         (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS))
835             && (!irb->scsw.cc)) {
836                 if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) &&
837                     !irb->esw.esw0.erw.cons) {
838                         /* Unit check but no sense data. Need basic sense. */
839                         if (ccw_device_do_sense(cdev, irb) != 0)
840                                 goto call_handler_unsol;
841                         memcpy(&cdev->private->irb, irb, sizeof(struct irb));
842                         cdev->private->state = DEV_STATE_W4SENSE;
843                         cdev->private->intparm = 0;
844                         return;
845                 }
846 call_handler_unsol:
847                 if (cdev->handler)
848                         cdev->handler (cdev, 0, irb);
849                 if (cdev->private->flags.doverify)
850                         ccw_device_online_verify(cdev, 0);
851                 return;
852         }
853         /* Accumulate status and find out if a basic sense is needed. */
854         ccw_device_accumulate_irb(cdev, irb);
855         if (cdev->private->flags.dosense) {
856                 if (ccw_device_do_sense(cdev, irb) == 0) {
857                         cdev->private->state = DEV_STATE_W4SENSE;
858                 }
859                 return;
860         }
861         /* Call the handler. */
862         if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
863                 /* Start delayed path verification. */
864                 ccw_device_online_verify(cdev, 0);
865 }
866
867 /*
868  * Got an timeout in online state.
869  */
870 static void
871 ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
872 {
873         int ret;
874
875         ccw_device_set_timeout(cdev, 0);
876         ret = ccw_device_cancel_halt_clear(cdev);
877         if (ret == -EBUSY) {
878                 ccw_device_set_timeout(cdev, 3*HZ);
879                 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
880                 return;
881         }
882         if (ret == -ENODEV)
883                 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
884         else if (cdev->handler)
885                 cdev->handler(cdev, cdev->private->intparm,
886                               ERR_PTR(-ETIMEDOUT));
887 }
888
889 /*
890  * Got an interrupt for a basic sense.
891  */
892 static void
893 ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
894 {
895         struct irb *irb;
896
897         irb = (struct irb *) __LC_IRB;
898         /* Check for unsolicited interrupt. */
899         if (irb->scsw.stctl ==
900                         (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
901                 if (irb->scsw.cc == 1)
902                         /* Basic sense hasn't started. Try again. */
903                         ccw_device_do_sense(cdev, irb);
904                 else {
905                         CIO_MSG_EVENT(2, "Huh? 0.%x.%04x: unsolicited "
906                                       "interrupt during w4sense...\n",
907                                       cdev->private->dev_id.ssid,
908                                       cdev->private->dev_id.devno);
909                         if (cdev->handler)
910                                 cdev->handler (cdev, 0, irb);
911                 }
912                 return;
913         }
914         /*
915          * Check if a halt or clear has been issued in the meanwhile. If yes,
916          * only deliver the halt/clear interrupt to the device driver as if it
917          * had killed the original request.
918          */
919         if (irb->scsw.fctl & (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
920                 /* Retry Basic Sense if requested. */
921                 if (cdev->private->flags.intretry) {
922                         cdev->private->flags.intretry = 0;
923                         ccw_device_do_sense(cdev, irb);
924                         return;
925                 }
926                 cdev->private->flags.dosense = 0;
927                 memset(&cdev->private->irb, 0, sizeof(struct irb));
928                 ccw_device_accumulate_irb(cdev, irb);
929                 goto call_handler;
930         }
931         /* Add basic sense info to irb. */
932         ccw_device_accumulate_basic_sense(cdev, irb);
933         if (cdev->private->flags.dosense) {
934                 /* Another basic sense is needed. */
935                 ccw_device_do_sense(cdev, irb);
936                 return;
937         }
938 call_handler:
939         cdev->private->state = DEV_STATE_ONLINE;
940         /* Call the handler. */
941         if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
942                 /* Start delayed path verification. */
943                 ccw_device_online_verify(cdev, 0);
944 }
945
946 static void
947 ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event)
948 {
949         struct irb *irb;
950
951         irb = (struct irb *) __LC_IRB;
952         /* Accumulate status. We don't do basic sense. */
953         ccw_device_accumulate_irb(cdev, irb);
954         /* Remember to clear irb to avoid residuals. */
955         memset(&cdev->private->irb, 0, sizeof(struct irb));
956         /* Try to start delayed device verification. */
957         ccw_device_online_verify(cdev, 0);
958         /* Note: Don't call handler for cio initiated clear! */
959 }
960
961 static void
962 ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
963 {
964         struct subchannel *sch;
965
966         sch = to_subchannel(cdev->dev.parent);
967         ccw_device_set_timeout(cdev, 0);
968         /* Start delayed path verification. */
969         ccw_device_online_verify(cdev, 0);
970         /* OK, i/o is dead now. Call interrupt handler. */
971         if (cdev->handler)
972                 cdev->handler(cdev, cdev->private->intparm,
973                               ERR_PTR(-EIO));
974 }
975
976 static void
977 ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
978 {
979         int ret;
980
981         ret = ccw_device_cancel_halt_clear(cdev);
982         if (ret == -EBUSY) {
983                 ccw_device_set_timeout(cdev, 3*HZ);
984                 return;
985         }
986         /* Start delayed path verification. */
987         ccw_device_online_verify(cdev, 0);
988         if (cdev->handler)
989                 cdev->handler(cdev, cdev->private->intparm,
990                               ERR_PTR(-EIO));
991 }
992
993 void device_kill_io(struct subchannel *sch)
994 {
995         int ret;
996         struct ccw_device *cdev;
997
998         cdev = sch_get_cdev(sch);
999         ret = ccw_device_cancel_halt_clear(cdev);
1000         if (ret == -EBUSY) {
1001                 ccw_device_set_timeout(cdev, 3*HZ);
1002                 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
1003                 return;
1004         }
1005         /* Start delayed path verification. */
1006         ccw_device_online_verify(cdev, 0);
1007         if (cdev->handler)
1008                 cdev->handler(cdev, cdev->private->intparm,
1009                               ERR_PTR(-EIO));
1010 }
1011
1012 static void
1013 ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event)
1014 {
1015         /* Start verification after current task finished. */
1016         cdev->private->flags.doverify = 1;
1017 }
1018
1019 static void
1020 ccw_device_stlck_done(struct ccw_device *cdev, enum dev_event dev_event)
1021 {
1022         struct irb *irb;
1023
1024         switch (dev_event) {
1025         case DEV_EVENT_INTERRUPT:
1026                 irb = (struct irb *) __LC_IRB;
1027                 /* Check for unsolicited interrupt. */
1028                 if ((irb->scsw.stctl ==
1029                      (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) &&
1030                     (!irb->scsw.cc))
1031                         /* FIXME: we should restart stlck here, but this
1032                          * is extremely unlikely ... */
1033                         goto out_wakeup;
1034
1035                 ccw_device_accumulate_irb(cdev, irb);
1036                 /* We don't care about basic sense etc. */
1037                 break;
1038         default: /* timeout */
1039                 break;
1040         }
1041 out_wakeup:
1042         wake_up(&cdev->private->wait_q);
1043 }
1044
1045 static void
1046 ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
1047 {
1048         struct subchannel *sch;
1049
1050         sch = to_subchannel(cdev->dev.parent);
1051         if (cio_enable_subchannel(sch, sch->schib.pmcw.isc,
1052                                   (u32)(addr_t)sch) != 0)
1053                 /* Couldn't enable the subchannel for i/o. Sick device. */
1054                 return;
1055
1056         /* After 60s the device recognition is considered to have failed. */
1057         ccw_device_set_timeout(cdev, 60*HZ);
1058
1059         cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
1060         ccw_device_sense_id_start(cdev);
1061 }
1062
1063 void
1064 device_trigger_reprobe(struct subchannel *sch)
1065 {
1066         struct ccw_device *cdev;
1067
1068         cdev = sch_get_cdev(sch);
1069         if (!cdev)
1070                 return;
1071         if (cdev->private->state != DEV_STATE_DISCONNECTED)
1072                 return;
1073
1074         /* Update some values. */
1075         if (stsch(sch->schid, &sch->schib))
1076                 return;
1077         if (!sch->schib.pmcw.dnv)
1078                 return;
1079         /*
1080          * The pim, pam, pom values may not be accurate, but they are the best
1081          * we have before performing device selection :/
1082          */
1083         sch->lpm = sch->schib.pmcw.pam & sch->opm;
1084         /* Re-set some bits in the pmcw that were lost. */
1085         sch->schib.pmcw.isc = 3;
1086         sch->schib.pmcw.csense = 1;
1087         sch->schib.pmcw.ena = 0;
1088         if ((sch->lpm & (sch->lpm - 1)) != 0)
1089                 sch->schib.pmcw.mp = 1;
1090         sch->schib.pmcw.intparm = (u32)(addr_t)sch;
1091         /* We should also udate ssd info, but this has to wait. */
1092         /* Check if this is another device which appeared on the same sch. */
1093         if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {
1094                 PREPARE_WORK(&cdev->private->kick_work,
1095                              ccw_device_move_to_orphanage);
1096                 queue_work(slow_path_wq, &cdev->private->kick_work);
1097         } else
1098                 ccw_device_start_id(cdev, 0);
1099 }
1100
1101 static void
1102 ccw_device_offline_irq(struct ccw_device *cdev, enum dev_event dev_event)
1103 {
1104         struct subchannel *sch;
1105
1106         sch = to_subchannel(cdev->dev.parent);
1107         /*
1108          * An interrupt in state offline means a previous disable was not
1109          * successful. Try again.
1110          */
1111         cio_disable_subchannel(sch);
1112 }
1113
1114 static void
1115 ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event)
1116 {
1117         retry_set_schib(cdev);
1118         cdev->private->state = DEV_STATE_ONLINE;
1119         dev_fsm_event(cdev, dev_event);
1120 }
1121
1122 static void ccw_device_update_cmfblock(struct ccw_device *cdev,
1123                                        enum dev_event dev_event)
1124 {
1125         cmf_retry_copy_block(cdev);
1126         cdev->private->state = DEV_STATE_ONLINE;
1127         dev_fsm_event(cdev, dev_event);
1128 }
1129
1130 static void
1131 ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
1132 {
1133         ccw_device_set_timeout(cdev, 0);
1134         if (dev_event == DEV_EVENT_NOTOPER)
1135                 cdev->private->state = DEV_STATE_NOT_OPER;
1136         else
1137                 cdev->private->state = DEV_STATE_OFFLINE;
1138         wake_up(&cdev->private->wait_q);
1139 }
1140
1141 static void
1142 ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event)
1143 {
1144         int ret;
1145
1146         ret = ccw_device_cancel_halt_clear(cdev);
1147         switch (ret) {
1148         case 0:
1149                 cdev->private->state = DEV_STATE_OFFLINE;
1150                 wake_up(&cdev->private->wait_q);
1151                 break;
1152         case -ENODEV:
1153                 cdev->private->state = DEV_STATE_NOT_OPER;
1154                 wake_up(&cdev->private->wait_q);
1155                 break;
1156         default:
1157                 ccw_device_set_timeout(cdev, HZ/10);
1158         }
1159 }
1160
1161 /*
1162  * No operation action. This is used e.g. to ignore a timeout event in
1163  * state offline.
1164  */
1165 static void
1166 ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
1167 {
1168 }
1169
1170 /*
1171  * Bug operation action. 
1172  */
1173 static void
1174 ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event)
1175 {
1176         CIO_MSG_EVENT(0, "dev_jumptable[%i][%i] == NULL\n",
1177                       cdev->private->state, dev_event);
1178         BUG();
1179 }
1180
1181 /*
1182  * device statemachine
1183  */
1184 fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1185         [DEV_STATE_NOT_OPER] = {
1186                 [DEV_EVENT_NOTOPER]     = ccw_device_nop,
1187                 [DEV_EVENT_INTERRUPT]   = ccw_device_bug,
1188                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1189                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1190         },
1191         [DEV_STATE_SENSE_PGID] = {
1192                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1193                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_pgid_irq,
1194                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1195                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1196         },
1197         [DEV_STATE_SENSE_ID] = {
1198                 [DEV_EVENT_NOTOPER]     = ccw_device_recog_notoper,
1199                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_id_irq,
1200                 [DEV_EVENT_TIMEOUT]     = ccw_device_recog_timeout,
1201                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1202         },
1203         [DEV_STATE_OFFLINE] = {
1204                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1205                 [DEV_EVENT_INTERRUPT]   = ccw_device_offline_irq,
1206                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1207                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1208         },
1209         [DEV_STATE_VERIFY] = {
1210                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1211                 [DEV_EVENT_INTERRUPT]   = ccw_device_verify_irq,
1212                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1213                 [DEV_EVENT_VERIFY]      = ccw_device_delay_verify,
1214         },
1215         [DEV_STATE_ONLINE] = {
1216                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1217                 [DEV_EVENT_INTERRUPT]   = ccw_device_irq,
1218                 [DEV_EVENT_TIMEOUT]     = ccw_device_online_timeout,
1219                 [DEV_EVENT_VERIFY]      = ccw_device_online_verify,
1220         },
1221         [DEV_STATE_W4SENSE] = {
1222                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1223                 [DEV_EVENT_INTERRUPT]   = ccw_device_w4sense,
1224                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1225                 [DEV_EVENT_VERIFY]      = ccw_device_online_verify,
1226         },
1227         [DEV_STATE_DISBAND_PGID] = {
1228                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1229                 [DEV_EVENT_INTERRUPT]   = ccw_device_disband_irq,
1230                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1231                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1232         },
1233         [DEV_STATE_BOXED] = {
1234                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1235                 [DEV_EVENT_INTERRUPT]   = ccw_device_stlck_done,
1236                 [DEV_EVENT_TIMEOUT]     = ccw_device_stlck_done,
1237                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1238         },
1239         /* states to wait for i/o completion before doing something */
1240         [DEV_STATE_CLEAR_VERIFY] = {
1241                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1242                 [DEV_EVENT_INTERRUPT]   = ccw_device_clear_verify,
1243                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1244                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1245         },
1246         [DEV_STATE_TIMEOUT_KILL] = {
1247                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1248                 [DEV_EVENT_INTERRUPT]   = ccw_device_killing_irq,
1249                 [DEV_EVENT_TIMEOUT]     = ccw_device_killing_timeout,
1250                 [DEV_EVENT_VERIFY]      = ccw_device_nop, //FIXME
1251         },
1252         [DEV_STATE_QUIESCE] = {
1253                 [DEV_EVENT_NOTOPER]     = ccw_device_quiesce_done,
1254                 [DEV_EVENT_INTERRUPT]   = ccw_device_quiesce_done,
1255                 [DEV_EVENT_TIMEOUT]     = ccw_device_quiesce_timeout,
1256                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1257         },
1258         /* special states for devices gone not operational */
1259         [DEV_STATE_DISCONNECTED] = {
1260                 [DEV_EVENT_NOTOPER]     = ccw_device_nop,
1261                 [DEV_EVENT_INTERRUPT]   = ccw_device_start_id,
1262                 [DEV_EVENT_TIMEOUT]     = ccw_device_bug,
1263                 [DEV_EVENT_VERIFY]      = ccw_device_start_id,
1264         },
1265         [DEV_STATE_DISCONNECTED_SENSE_ID] = {
1266                 [DEV_EVENT_NOTOPER]     = ccw_device_recog_notoper,
1267                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_id_irq,
1268                 [DEV_EVENT_TIMEOUT]     = ccw_device_recog_timeout,
1269                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1270         },
1271         [DEV_STATE_CMFCHANGE] = {
1272                 [DEV_EVENT_NOTOPER]     = ccw_device_change_cmfstate,
1273                 [DEV_EVENT_INTERRUPT]   = ccw_device_change_cmfstate,
1274                 [DEV_EVENT_TIMEOUT]     = ccw_device_change_cmfstate,
1275                 [DEV_EVENT_VERIFY]      = ccw_device_change_cmfstate,
1276         },
1277         [DEV_STATE_CMFUPDATE] = {
1278                 [DEV_EVENT_NOTOPER]     = ccw_device_update_cmfblock,
1279                 [DEV_EVENT_INTERRUPT]   = ccw_device_update_cmfblock,
1280                 [DEV_EVENT_TIMEOUT]     = ccw_device_update_cmfblock,
1281                 [DEV_EVENT_VERIFY]      = ccw_device_update_cmfblock,
1282         },
1283 };
1284
1285 EXPORT_SYMBOL_GPL(ccw_device_set_timeout);