Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[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 IBM Corp. 2002,2008
6  *    Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)
7  *               Martin Schwidefsky (schwidefsky@de.ibm.com)
8  */
9
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/jiffies.h>
13 #include <linux/string.h>
14
15 #include <asm/ccwdev.h>
16 #include <asm/cio.h>
17 #include <asm/chpid.h>
18
19 #include "cio.h"
20 #include "cio_debug.h"
21 #include "css.h"
22 #include "device.h"
23 #include "chsc.h"
24 #include "ioasm.h"
25 #include "chp.h"
26
27 static int timeout_log_enabled;
28
29 static int __init ccw_timeout_log_setup(char *unused)
30 {
31         timeout_log_enabled = 1;
32         return 1;
33 }
34
35 __setup("ccw_timeout_log", ccw_timeout_log_setup);
36
37 static void ccw_timeout_log(struct ccw_device *cdev)
38 {
39         struct schib schib;
40         struct subchannel *sch;
41         struct io_subchannel_private *private;
42         union orb *orb;
43         int cc;
44
45         sch = to_subchannel(cdev->dev.parent);
46         private = to_io_private(sch);
47         orb = &private->orb;
48         cc = stsch(sch->schid, &schib);
49
50         printk(KERN_WARNING "cio: ccw device timeout occurred at %llx, "
51                "device information:\n", get_clock());
52         printk(KERN_WARNING "cio: orb:\n");
53         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
54                        orb, sizeof(*orb), 0);
55         printk(KERN_WARNING "cio: ccw device bus id: %s\n",
56                dev_name(&cdev->dev));
57         printk(KERN_WARNING "cio: subchannel bus id: %s\n",
58                dev_name(&sch->dev));
59         printk(KERN_WARNING "cio: subchannel lpm: %02x, opm: %02x, "
60                "vpm: %02x\n", sch->lpm, sch->opm, sch->vpm);
61
62         if (orb->tm.b) {
63                 printk(KERN_WARNING "cio: orb indicates transport mode\n");
64                 printk(KERN_WARNING "cio: last tcw:\n");
65                 print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
66                                (void *)(addr_t)orb->tm.tcw,
67                                sizeof(struct tcw), 0);
68         } else {
69                 printk(KERN_WARNING "cio: orb indicates command mode\n");
70                 if ((void *)(addr_t)orb->cmd.cpa == &private->sense_ccw ||
71                     (void *)(addr_t)orb->cmd.cpa == cdev->private->iccws)
72                         printk(KERN_WARNING "cio: last channel program "
73                                "(intern):\n");
74                 else
75                         printk(KERN_WARNING "cio: last channel program:\n");
76
77                 print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
78                                (void *)(addr_t)orb->cmd.cpa,
79                                sizeof(struct ccw1), 0);
80         }
81         printk(KERN_WARNING "cio: ccw device state: %d\n",
82                cdev->private->state);
83         printk(KERN_WARNING "cio: store subchannel returned: cc=%d\n", cc);
84         printk(KERN_WARNING "cio: schib:\n");
85         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
86                        &schib, sizeof(schib), 0);
87         printk(KERN_WARNING "cio: ccw device flags:\n");
88         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
89                        &cdev->private->flags, sizeof(cdev->private->flags), 0);
90 }
91
92 /*
93  * Timeout function. It just triggers a DEV_EVENT_TIMEOUT.
94  */
95 static void
96 ccw_device_timeout(unsigned long data)
97 {
98         struct ccw_device *cdev;
99
100         cdev = (struct ccw_device *) data;
101         spin_lock_irq(cdev->ccwlock);
102         if (timeout_log_enabled)
103                 ccw_timeout_log(cdev);
104         dev_fsm_event(cdev, DEV_EVENT_TIMEOUT);
105         spin_unlock_irq(cdev->ccwlock);
106 }
107
108 /*
109  * Set timeout
110  */
111 void
112 ccw_device_set_timeout(struct ccw_device *cdev, int expires)
113 {
114         if (expires == 0) {
115                 del_timer(&cdev->private->timer);
116                 return;
117         }
118         if (timer_pending(&cdev->private->timer)) {
119                 if (mod_timer(&cdev->private->timer, jiffies + expires))
120                         return;
121         }
122         cdev->private->timer.function = ccw_device_timeout;
123         cdev->private->timer.data = (unsigned long) cdev;
124         cdev->private->timer.expires = jiffies + expires;
125         add_timer(&cdev->private->timer);
126 }
127
128 /*
129  * Cancel running i/o. This is called repeatedly since halt/clear are
130  * asynchronous operations. We do one try with cio_cancel, two tries
131  * with cio_halt, 255 tries with cio_clear. If everythings fails panic.
132  * Returns 0 if device now idle, -ENODEV for device not operational and
133  * -EBUSY if an interrupt is expected (either from halt/clear or from a
134  * status pending).
135  */
136 int
137 ccw_device_cancel_halt_clear(struct ccw_device *cdev)
138 {
139         struct subchannel *sch;
140         int ret;
141
142         sch = to_subchannel(cdev->dev.parent);
143         if (cio_update_schib(sch))
144                 return -ENODEV; 
145         if (!sch->schib.pmcw.ena)
146                 /* Not operational -> done. */
147                 return 0;
148         /* Stage 1: cancel io. */
149         if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_HALT_PEND) &&
150             !(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
151                 if (!scsw_is_tm(&sch->schib.scsw)) {
152                         ret = cio_cancel(sch);
153                         if (ret != -EINVAL)
154                                 return ret;
155                 }
156                 /* cancel io unsuccessful or not applicable (transport mode).
157                  * Continue with asynchronous instructions. */
158                 cdev->private->iretry = 3;      /* 3 halt retries. */
159         }
160         if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
161                 /* Stage 2: halt io. */
162                 if (cdev->private->iretry) {
163                         cdev->private->iretry--;
164                         ret = cio_halt(sch);
165                         if (ret != -EBUSY)
166                                 return (ret == 0) ? -EBUSY : ret;
167                 }
168                 /* halt io unsuccessful. */
169                 cdev->private->iretry = 255;    /* 255 clear retries. */
170         }
171         /* Stage 3: clear io. */
172         if (cdev->private->iretry) {
173                 cdev->private->iretry--;
174                 ret = cio_clear (sch);
175                 return (ret == 0) ? -EBUSY : ret;
176         }
177         panic("Can't stop i/o on subchannel.\n");
178 }
179
180 static int
181 ccw_device_handle_oper(struct ccw_device *cdev)
182 {
183         struct subchannel *sch;
184
185         sch = to_subchannel(cdev->dev.parent);
186         cdev->private->flags.recog_done = 1;
187         /*
188          * Check if cu type and device type still match. If
189          * not, it is certainly another device and we have to
190          * de- and re-register.
191          */
192         if (cdev->id.cu_type != cdev->private->senseid.cu_type ||
193             cdev->id.cu_model != cdev->private->senseid.cu_model ||
194             cdev->id.dev_type != cdev->private->senseid.dev_type ||
195             cdev->id.dev_model != cdev->private->senseid.dev_model) {
196                 PREPARE_WORK(&cdev->private->kick_work,
197                              ccw_device_do_unbind_bind);
198                 queue_work(ccw_device_work, &cdev->private->kick_work);
199                 return 0;
200         }
201         cdev->private->flags.donotify = 1;
202         return 1;
203 }
204
205 /*
206  * The machine won't give us any notification by machine check if a chpid has
207  * been varied online on the SE so we have to find out by magic (i. e. driving
208  * the channel subsystem to device selection and updating our path masks).
209  */
210 static void
211 __recover_lost_chpids(struct subchannel *sch, int old_lpm)
212 {
213         int mask, i;
214         struct chp_id chpid;
215
216         chp_id_init(&chpid);
217         for (i = 0; i<8; i++) {
218                 mask = 0x80 >> i;
219                 if (!(sch->lpm & mask))
220                         continue;
221                 if (old_lpm & mask)
222                         continue;
223                 chpid.id = sch->schib.pmcw.chpid[i];
224                 if (!chp_is_registered(chpid))
225                         css_schedule_eval_all();
226         }
227 }
228
229 /*
230  * Stop device recognition.
231  */
232 static void
233 ccw_device_recog_done(struct ccw_device *cdev, int state)
234 {
235         struct subchannel *sch;
236         int notify, old_lpm, same_dev;
237
238         sch = to_subchannel(cdev->dev.parent);
239
240         ccw_device_set_timeout(cdev, 0);
241         cio_disable_subchannel(sch);
242         /*
243          * Now that we tried recognition, we have performed device selection
244          * through ssch() and the path information is up to date.
245          */
246         old_lpm = sch->lpm;
247
248         /* Check since device may again have become not operational. */
249         if (cio_update_schib(sch))
250                 state = DEV_STATE_NOT_OPER;
251         else
252                 sch->lpm = sch->schib.pmcw.pam & sch->opm;
253
254         if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID)
255                 /* Force reprobe on all chpids. */
256                 old_lpm = 0;
257         if (sch->lpm != old_lpm)
258                 __recover_lost_chpids(sch, old_lpm);
259         if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID &&
260             (state == DEV_STATE_NOT_OPER || state == DEV_STATE_BOXED)) {
261                 cdev->private->flags.recog_done = 1;
262                 cdev->private->state = DEV_STATE_DISCONNECTED;
263                 wake_up(&cdev->private->wait_q);
264                 return;
265         }
266         notify = 0;
267         same_dev = 0; /* Keep the compiler quiet... */
268         switch (state) {
269         case DEV_STATE_NOT_OPER:
270                 CIO_MSG_EVENT(2, "SenseID : unknown device %04x on "
271                               "subchannel 0.%x.%04x\n",
272                               cdev->private->dev_id.devno,
273                               sch->schid.ssid, sch->schid.sch_no);
274                 break;
275         case DEV_STATE_OFFLINE:
276                 if (cdev->online) {
277                         same_dev = ccw_device_handle_oper(cdev);
278                         notify = 1;
279                 }
280                 /* fill out sense information */
281                 memset(&cdev->id, 0, sizeof(cdev->id));
282                 cdev->id.cu_type   = cdev->private->senseid.cu_type;
283                 cdev->id.cu_model  = cdev->private->senseid.cu_model;
284                 cdev->id.dev_type  = cdev->private->senseid.dev_type;
285                 cdev->id.dev_model = cdev->private->senseid.dev_model;
286                 if (notify) {
287                         cdev->private->state = DEV_STATE_OFFLINE;
288                         if (same_dev) {
289                                 /* Get device online again. */
290                                 ccw_device_online(cdev);
291                                 wake_up(&cdev->private->wait_q);
292                         }
293                         return;
294                 }
295                 /* Issue device info message. */
296                 CIO_MSG_EVENT(4, "SenseID : device 0.%x.%04x reports: "
297                               "CU  Type/Mod = %04X/%02X, Dev Type/Mod = "
298                               "%04X/%02X\n",
299                               cdev->private->dev_id.ssid,
300                               cdev->private->dev_id.devno,
301                               cdev->id.cu_type, cdev->id.cu_model,
302                               cdev->id.dev_type, cdev->id.dev_model);
303                 break;
304         case DEV_STATE_BOXED:
305                 CIO_MSG_EVENT(0, "SenseID : boxed device %04x on "
306                               " subchannel 0.%x.%04x\n",
307                               cdev->private->dev_id.devno,
308                               sch->schid.ssid, sch->schid.sch_no);
309                 if (cdev->id.cu_type != 0) { /* device was recognized before */
310                         cdev->private->flags.recog_done = 1;
311                         cdev->private->state = DEV_STATE_BOXED;
312                         wake_up(&cdev->private->wait_q);
313                         return;
314                 }
315                 break;
316         }
317         cdev->private->state = state;
318         io_subchannel_recog_done(cdev);
319         wake_up(&cdev->private->wait_q);
320 }
321
322 /*
323  * Function called from device_id.c after sense id has completed.
324  */
325 void
326 ccw_device_sense_id_done(struct ccw_device *cdev, int err)
327 {
328         switch (err) {
329         case 0:
330                 ccw_device_recog_done(cdev, DEV_STATE_OFFLINE);
331                 break;
332         case -ETIME:            /* Sense id stopped by timeout. */
333                 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
334                 break;
335         default:
336                 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
337                 break;
338         }
339 }
340
341 int ccw_device_notify(struct ccw_device *cdev, int event)
342 {
343         if (!cdev->drv)
344                 return 0;
345         if (!cdev->online)
346                 return 0;
347         CIO_MSG_EVENT(2, "notify called for 0.%x.%04x, event=%d\n",
348                       cdev->private->dev_id.ssid, cdev->private->dev_id.devno,
349                       event);
350         return cdev->drv->notify ? cdev->drv->notify(cdev, event) : 0;
351 }
352
353 static void cmf_reenable_delayed(struct work_struct *work)
354 {
355         struct ccw_device_private *priv;
356         struct ccw_device *cdev;
357
358         priv = container_of(work, struct ccw_device_private, kick_work);
359         cdev = priv->cdev;
360         cmf_reenable(cdev);
361 }
362
363 static void ccw_device_oper_notify(struct ccw_device *cdev)
364 {
365         if (ccw_device_notify(cdev, CIO_OPER)) {
366                 /* Reenable channel measurements, if needed. */
367                 PREPARE_WORK(&cdev->private->kick_work, cmf_reenable_delayed);
368                 queue_work(ccw_device_work, &cdev->private->kick_work);
369                 return;
370         }
371         /* Driver doesn't want device back. */
372         ccw_device_set_notoper(cdev);
373         PREPARE_WORK(&cdev->private->kick_work, ccw_device_do_unbind_bind);
374         queue_work(ccw_device_work, &cdev->private->kick_work);
375 }
376
377 /*
378  * Finished with online/offline processing.
379  */
380 static void
381 ccw_device_done(struct ccw_device *cdev, int state)
382 {
383         struct subchannel *sch;
384
385         sch = to_subchannel(cdev->dev.parent);
386
387         ccw_device_set_timeout(cdev, 0);
388
389         if (state != DEV_STATE_ONLINE)
390                 cio_disable_subchannel(sch);
391
392         /* Reset device status. */
393         memset(&cdev->private->irb, 0, sizeof(struct irb));
394
395         cdev->private->state = state;
396
397         if (state == DEV_STATE_BOXED) {
398                 CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n",
399                               cdev->private->dev_id.devno, sch->schid.sch_no);
400                 if (cdev->online && !ccw_device_notify(cdev, CIO_BOXED))
401                         ccw_device_schedule_sch_unregister(cdev);
402                 cdev->private->flags.donotify = 0;
403         }
404
405         if (cdev->private->flags.donotify) {
406                 cdev->private->flags.donotify = 0;
407                 ccw_device_oper_notify(cdev);
408         }
409         wake_up(&cdev->private->wait_q);
410 }
411
412 static int cmp_pgid(struct pgid *p1, struct pgid *p2)
413 {
414         char *c1;
415         char *c2;
416
417         c1 = (char *)p1;
418         c2 = (char *)p2;
419
420         return memcmp(c1 + 1, c2 + 1, sizeof(struct pgid) - 1);
421 }
422
423 static void __ccw_device_get_common_pgid(struct ccw_device *cdev)
424 {
425         int i;
426         int last;
427
428         last = 0;
429         for (i = 0; i < 8; i++) {
430                 if (cdev->private->pgid[i].inf.ps.state1 == SNID_STATE1_RESET)
431                         /* No PGID yet */
432                         continue;
433                 if (cdev->private->pgid[last].inf.ps.state1 ==
434                     SNID_STATE1_RESET) {
435                         /* First non-zero PGID */
436                         last = i;
437                         continue;
438                 }
439                 if (cmp_pgid(&cdev->private->pgid[i],
440                              &cdev->private->pgid[last]) == 0)
441                         /* Non-conflicting PGIDs */
442                         continue;
443
444                 /* PGID mismatch, can't pathgroup. */
445                 CIO_MSG_EVENT(0, "SNID - pgid mismatch for device "
446                               "0.%x.%04x, can't pathgroup\n",
447                               cdev->private->dev_id.ssid,
448                               cdev->private->dev_id.devno);
449                 cdev->private->options.pgroup = 0;
450                 return;
451         }
452         if (cdev->private->pgid[last].inf.ps.state1 ==
453             SNID_STATE1_RESET)
454                 /* No previous pgid found */
455                 memcpy(&cdev->private->pgid[0],
456                        &channel_subsystems[0]->global_pgid,
457                        sizeof(struct pgid));
458         else
459                 /* Use existing pgid */
460                 memcpy(&cdev->private->pgid[0], &cdev->private->pgid[last],
461                        sizeof(struct pgid));
462 }
463
464 /*
465  * Function called from device_pgid.c after sense path ground has completed.
466  */
467 void
468 ccw_device_sense_pgid_done(struct ccw_device *cdev, int err)
469 {
470         struct subchannel *sch;
471
472         sch = to_subchannel(cdev->dev.parent);
473         switch (err) {
474         case -EOPNOTSUPP: /* path grouping not supported, use nop instead. */
475                 cdev->private->options.pgroup = 0;
476                 break;
477         case 0: /* success */
478         case -EACCES: /* partial success, some paths not operational */
479                 /* Check if all pgids are equal or 0. */
480                 __ccw_device_get_common_pgid(cdev);
481                 break;
482         case -ETIME:            /* Sense path group id stopped by timeout. */
483         case -EUSERS:           /* device is reserved for someone else. */
484                 ccw_device_done(cdev, DEV_STATE_BOXED);
485                 return;
486         default:
487                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
488                 return;
489         }
490         /* Start Path Group verification. */
491         cdev->private->state = DEV_STATE_VERIFY;
492         cdev->private->flags.doverify = 0;
493         ccw_device_verify_start(cdev);
494 }
495
496 /*
497  * Start device recognition.
498  */
499 int
500 ccw_device_recognition(struct ccw_device *cdev)
501 {
502         struct subchannel *sch;
503         int ret;
504
505         if ((cdev->private->state != DEV_STATE_NOT_OPER) &&
506             (cdev->private->state != DEV_STATE_BOXED))
507                 return -EINVAL;
508         sch = to_subchannel(cdev->dev.parent);
509         ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
510         if (ret != 0)
511                 /* Couldn't enable the subchannel for i/o. Sick device. */
512                 return ret;
513
514         /* After 60s the device recognition is considered to have failed. */
515         ccw_device_set_timeout(cdev, 60*HZ);
516
517         /*
518          * We used to start here with a sense pgid to find out whether a device
519          * is locked by someone else. Unfortunately, the sense pgid command
520          * code has other meanings on devices predating the path grouping
521          * algorithm, so we start with sense id and box the device after an
522          * timeout (or if sense pgid during path verification detects the device
523          * is locked, as may happen on newer devices).
524          */
525         cdev->private->flags.recog_done = 0;
526         cdev->private->state = DEV_STATE_SENSE_ID;
527         ccw_device_sense_id_start(cdev);
528         return 0;
529 }
530
531 /*
532  * Handle timeout in device recognition.
533  */
534 static void
535 ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event)
536 {
537         int ret;
538
539         ret = ccw_device_cancel_halt_clear(cdev);
540         switch (ret) {
541         case 0:
542                 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
543                 break;
544         case -ENODEV:
545                 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
546                 break;
547         default:
548                 ccw_device_set_timeout(cdev, 3*HZ);
549         }
550 }
551
552
553 void
554 ccw_device_verify_done(struct ccw_device *cdev, int err)
555 {
556         struct subchannel *sch;
557
558         sch = to_subchannel(cdev->dev.parent);
559         /* Update schib - pom may have changed. */
560         if (cio_update_schib(sch)) {
561                 cdev->private->flags.donotify = 0;
562                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
563                 return;
564         }
565         /* Update lpm with verified path mask. */
566         sch->lpm = sch->vpm;
567         /* Repeat path verification? */
568         if (cdev->private->flags.doverify) {
569                 cdev->private->flags.doverify = 0;
570                 ccw_device_verify_start(cdev);
571                 return;
572         }
573         switch (err) {
574         case -EOPNOTSUPP: /* path grouping not supported, just set online. */
575                 cdev->private->options.pgroup = 0;
576         case 0:
577                 ccw_device_done(cdev, DEV_STATE_ONLINE);
578                 /* Deliver fake irb to device driver, if needed. */
579                 if (cdev->private->flags.fake_irb) {
580                         memset(&cdev->private->irb, 0, sizeof(struct irb));
581                         cdev->private->irb.scsw.cmd.cc = 1;
582                         cdev->private->irb.scsw.cmd.fctl = SCSW_FCTL_START_FUNC;
583                         cdev->private->irb.scsw.cmd.actl = SCSW_ACTL_START_PEND;
584                         cdev->private->irb.scsw.cmd.stctl =
585                                 SCSW_STCTL_STATUS_PEND;
586                         cdev->private->flags.fake_irb = 0;
587                         if (cdev->handler)
588                                 cdev->handler(cdev, cdev->private->intparm,
589                                               &cdev->private->irb);
590                         memset(&cdev->private->irb, 0, sizeof(struct irb));
591                 }
592                 break;
593         case -ETIME:
594                 /* Reset oper notify indication after verify error. */
595                 cdev->private->flags.donotify = 0;
596                 ccw_device_done(cdev, DEV_STATE_BOXED);
597                 break;
598         default:
599                 /* Reset oper notify indication after verify error. */
600                 cdev->private->flags.donotify = 0;
601                 if (cdev->online) {
602                         ccw_device_set_timeout(cdev, 0);
603                         dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
604                 } else
605                         ccw_device_done(cdev, DEV_STATE_NOT_OPER);
606                 break;
607         }
608 }
609
610 /*
611  * Get device online.
612  */
613 int
614 ccw_device_online(struct ccw_device *cdev)
615 {
616         struct subchannel *sch;
617         int ret;
618
619         if ((cdev->private->state != DEV_STATE_OFFLINE) &&
620             (cdev->private->state != DEV_STATE_BOXED))
621                 return -EINVAL;
622         sch = to_subchannel(cdev->dev.parent);
623         ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
624         if (ret != 0) {
625                 /* Couldn't enable the subchannel for i/o. Sick device. */
626                 if (ret == -ENODEV)
627                         dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
628                 return ret;
629         }
630         /* Do we want to do path grouping? */
631         if (!cdev->private->options.pgroup) {
632                 /* Start initial path verification. */
633                 cdev->private->state = DEV_STATE_VERIFY;
634                 cdev->private->flags.doverify = 0;
635                 ccw_device_verify_start(cdev);
636                 return 0;
637         }
638         /* Do a SensePGID first. */
639         cdev->private->state = DEV_STATE_SENSE_PGID;
640         ccw_device_sense_pgid_start(cdev);
641         return 0;
642 }
643
644 void
645 ccw_device_disband_done(struct ccw_device *cdev, int err)
646 {
647         switch (err) {
648         case 0:
649                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
650                 break;
651         case -ETIME:
652                 ccw_device_done(cdev, DEV_STATE_BOXED);
653                 break;
654         default:
655                 cdev->private->flags.donotify = 0;
656                 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
657                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
658                 break;
659         }
660 }
661
662 /*
663  * Shutdown device.
664  */
665 int
666 ccw_device_offline(struct ccw_device *cdev)
667 {
668         struct subchannel *sch;
669
670         /* Allow ccw_device_offline while disconnected. */
671         if (cdev->private->state == DEV_STATE_DISCONNECTED ||
672             cdev->private->state == DEV_STATE_NOT_OPER) {
673                 cdev->private->flags.donotify = 0;
674                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
675                 return 0;
676         }
677         if (ccw_device_is_orphan(cdev)) {
678                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
679                 return 0;
680         }
681         sch = to_subchannel(cdev->dev.parent);
682         if (cio_update_schib(sch))
683                 return -ENODEV;
684         if (scsw_actl(&sch->schib.scsw) != 0)
685                 return -EBUSY;
686         if (cdev->private->state != DEV_STATE_ONLINE)
687                 return -EINVAL;
688         /* Are we doing path grouping? */
689         if (!cdev->private->options.pgroup) {
690                 /* No, set state offline immediately. */
691                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
692                 return 0;
693         }
694         /* Start Set Path Group commands. */
695         cdev->private->state = DEV_STATE_DISBAND_PGID;
696         ccw_device_disband_start(cdev);
697         return 0;
698 }
699
700 /*
701  * Handle timeout in device online/offline process.
702  */
703 static void
704 ccw_device_onoff_timeout(struct ccw_device *cdev, enum dev_event dev_event)
705 {
706         int ret;
707
708         ret = ccw_device_cancel_halt_clear(cdev);
709         switch (ret) {
710         case 0:
711                 ccw_device_done(cdev, DEV_STATE_BOXED);
712                 break;
713         case -ENODEV:
714                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
715                 break;
716         default:
717                 ccw_device_set_timeout(cdev, 3*HZ);
718         }
719 }
720
721 /*
722  * Handle not oper event in device recognition.
723  */
724 static void
725 ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event)
726 {
727         ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
728 }
729
730 /*
731  * Handle not operational event in non-special state.
732  */
733 static void ccw_device_generic_notoper(struct ccw_device *cdev,
734                                        enum dev_event dev_event)
735 {
736         struct subchannel *sch;
737
738         ccw_device_set_notoper(cdev);
739         sch = to_subchannel(cdev->dev.parent);
740         css_schedule_eval(sch->schid);
741 }
742
743 /*
744  * Handle path verification event.
745  */
746 static void
747 ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
748 {
749         struct subchannel *sch;
750
751         if (cdev->private->state == DEV_STATE_W4SENSE) {
752                 cdev->private->flags.doverify = 1;
753                 return;
754         }
755         sch = to_subchannel(cdev->dev.parent);
756         /*
757          * Since we might not just be coming from an interrupt from the
758          * subchannel we have to update the schib.
759          */
760         if (cio_update_schib(sch)) {
761                 ccw_device_verify_done(cdev, -ENODEV);
762                 return;
763         }
764
765         if (scsw_actl(&sch->schib.scsw) != 0 ||
766             (scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) ||
767             (scsw_stctl(&cdev->private->irb.scsw) & SCSW_STCTL_STATUS_PEND)) {
768                 /*
769                  * No final status yet or final status not yet delivered
770                  * to the device driver. Can't do path verfication now,
771                  * delay until final status was delivered.
772                  */
773                 cdev->private->flags.doverify = 1;
774                 return;
775         }
776         /* Device is idle, we can do the path verification. */
777         cdev->private->state = DEV_STATE_VERIFY;
778         cdev->private->flags.doverify = 0;
779         ccw_device_verify_start(cdev);
780 }
781
782 /*
783  * Got an interrupt for a normal io (state online).
784  */
785 static void
786 ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event)
787 {
788         struct irb *irb;
789         int is_cmd;
790
791         irb = (struct irb *) __LC_IRB;
792         is_cmd = !scsw_is_tm(&irb->scsw);
793         /* Check for unsolicited interrupt. */
794         if (!scsw_is_solicited(&irb->scsw)) {
795                 if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
796                     !irb->esw.esw0.erw.cons) {
797                         /* Unit check but no sense data. Need basic sense. */
798                         if (ccw_device_do_sense(cdev, irb) != 0)
799                                 goto call_handler_unsol;
800                         memcpy(&cdev->private->irb, irb, sizeof(struct irb));
801                         cdev->private->state = DEV_STATE_W4SENSE;
802                         cdev->private->intparm = 0;
803                         return;
804                 }
805 call_handler_unsol:
806                 if (cdev->handler)
807                         cdev->handler (cdev, 0, irb);
808                 if (cdev->private->flags.doverify)
809                         ccw_device_online_verify(cdev, 0);
810                 return;
811         }
812         /* Accumulate status and find out if a basic sense is needed. */
813         ccw_device_accumulate_irb(cdev, irb);
814         if (is_cmd && cdev->private->flags.dosense) {
815                 if (ccw_device_do_sense(cdev, irb) == 0) {
816                         cdev->private->state = DEV_STATE_W4SENSE;
817                 }
818                 return;
819         }
820         /* Call the handler. */
821         if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
822                 /* Start delayed path verification. */
823                 ccw_device_online_verify(cdev, 0);
824 }
825
826 /*
827  * Got an timeout in online state.
828  */
829 static void
830 ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
831 {
832         int ret;
833
834         ccw_device_set_timeout(cdev, 0);
835         ret = ccw_device_cancel_halt_clear(cdev);
836         if (ret == -EBUSY) {
837                 ccw_device_set_timeout(cdev, 3*HZ);
838                 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
839                 return;
840         }
841         if (ret == -ENODEV)
842                 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
843         else if (cdev->handler)
844                 cdev->handler(cdev, cdev->private->intparm,
845                               ERR_PTR(-ETIMEDOUT));
846 }
847
848 /*
849  * Got an interrupt for a basic sense.
850  */
851 static void
852 ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
853 {
854         struct irb *irb;
855
856         irb = (struct irb *) __LC_IRB;
857         /* Check for unsolicited interrupt. */
858         if (scsw_stctl(&irb->scsw) ==
859             (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
860                 if (scsw_cc(&irb->scsw) == 1)
861                         /* Basic sense hasn't started. Try again. */
862                         ccw_device_do_sense(cdev, irb);
863                 else {
864                         CIO_MSG_EVENT(0, "0.%x.%04x: unsolicited "
865                                       "interrupt during w4sense...\n",
866                                       cdev->private->dev_id.ssid,
867                                       cdev->private->dev_id.devno);
868                         if (cdev->handler)
869                                 cdev->handler (cdev, 0, irb);
870                 }
871                 return;
872         }
873         /*
874          * Check if a halt or clear has been issued in the meanwhile. If yes,
875          * only deliver the halt/clear interrupt to the device driver as if it
876          * had killed the original request.
877          */
878         if (scsw_fctl(&irb->scsw) &
879             (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
880                 /* Retry Basic Sense if requested. */
881                 if (cdev->private->flags.intretry) {
882                         cdev->private->flags.intretry = 0;
883                         ccw_device_do_sense(cdev, irb);
884                         return;
885                 }
886                 cdev->private->flags.dosense = 0;
887                 memset(&cdev->private->irb, 0, sizeof(struct irb));
888                 ccw_device_accumulate_irb(cdev, irb);
889                 goto call_handler;
890         }
891         /* Add basic sense info to irb. */
892         ccw_device_accumulate_basic_sense(cdev, irb);
893         if (cdev->private->flags.dosense) {
894                 /* Another basic sense is needed. */
895                 ccw_device_do_sense(cdev, irb);
896                 return;
897         }
898 call_handler:
899         cdev->private->state = DEV_STATE_ONLINE;
900         /* Call the handler. */
901         if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
902                 /* Start delayed path verification. */
903                 ccw_device_online_verify(cdev, 0);
904 }
905
906 static void
907 ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event)
908 {
909         struct irb *irb;
910
911         irb = (struct irb *) __LC_IRB;
912         /* Accumulate status. We don't do basic sense. */
913         ccw_device_accumulate_irb(cdev, irb);
914         /* Remember to clear irb to avoid residuals. */
915         memset(&cdev->private->irb, 0, sizeof(struct irb));
916         /* Try to start delayed device verification. */
917         ccw_device_online_verify(cdev, 0);
918         /* Note: Don't call handler for cio initiated clear! */
919 }
920
921 static void
922 ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
923 {
924         struct subchannel *sch;
925
926         sch = to_subchannel(cdev->dev.parent);
927         ccw_device_set_timeout(cdev, 0);
928         /* Start delayed path verification. */
929         ccw_device_online_verify(cdev, 0);
930         /* OK, i/o is dead now. Call interrupt handler. */
931         if (cdev->handler)
932                 cdev->handler(cdev, cdev->private->intparm,
933                               ERR_PTR(-EIO));
934 }
935
936 static void
937 ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
938 {
939         int ret;
940
941         ret = ccw_device_cancel_halt_clear(cdev);
942         if (ret == -EBUSY) {
943                 ccw_device_set_timeout(cdev, 3*HZ);
944                 return;
945         }
946         /* Start delayed path verification. */
947         ccw_device_online_verify(cdev, 0);
948         if (cdev->handler)
949                 cdev->handler(cdev, cdev->private->intparm,
950                               ERR_PTR(-EIO));
951 }
952
953 void ccw_device_kill_io(struct ccw_device *cdev)
954 {
955         int ret;
956
957         ret = ccw_device_cancel_halt_clear(cdev);
958         if (ret == -EBUSY) {
959                 ccw_device_set_timeout(cdev, 3*HZ);
960                 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
961                 return;
962         }
963         /* Start delayed path verification. */
964         ccw_device_online_verify(cdev, 0);
965         if (cdev->handler)
966                 cdev->handler(cdev, cdev->private->intparm,
967                               ERR_PTR(-EIO));
968 }
969
970 static void
971 ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event)
972 {
973         /* Start verification after current task finished. */
974         cdev->private->flags.doverify = 1;
975 }
976
977 static void
978 ccw_device_stlck_done(struct ccw_device *cdev, enum dev_event dev_event)
979 {
980         struct irb *irb;
981
982         switch (dev_event) {
983         case DEV_EVENT_INTERRUPT:
984                 irb = (struct irb *) __LC_IRB;
985                 /* Check for unsolicited interrupt. */
986                 if ((scsw_stctl(&irb->scsw) ==
987                      (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) &&
988                     (!scsw_cc(&irb->scsw)))
989                         /* FIXME: we should restart stlck here, but this
990                          * is extremely unlikely ... */
991                         goto out_wakeup;
992
993                 ccw_device_accumulate_irb(cdev, irb);
994                 /* We don't care about basic sense etc. */
995                 break;
996         default: /* timeout */
997                 break;
998         }
999 out_wakeup:
1000         wake_up(&cdev->private->wait_q);
1001 }
1002
1003 static void
1004 ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
1005 {
1006         struct subchannel *sch;
1007
1008         sch = to_subchannel(cdev->dev.parent);
1009         if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0)
1010                 /* Couldn't enable the subchannel for i/o. Sick device. */
1011                 return;
1012
1013         /* After 60s the device recognition is considered to have failed. */
1014         ccw_device_set_timeout(cdev, 60*HZ);
1015
1016         cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
1017         ccw_device_sense_id_start(cdev);
1018 }
1019
1020 void ccw_device_trigger_reprobe(struct ccw_device *cdev)
1021 {
1022         struct subchannel *sch;
1023
1024         if (cdev->private->state != DEV_STATE_DISCONNECTED)
1025                 return;
1026
1027         sch = to_subchannel(cdev->dev.parent);
1028         /* Update some values. */
1029         if (cio_update_schib(sch))
1030                 return;
1031         /*
1032          * The pim, pam, pom values may not be accurate, but they are the best
1033          * we have before performing device selection :/
1034          */
1035         sch->lpm = sch->schib.pmcw.pam & sch->opm;
1036         /*
1037          * Use the initial configuration since we can't be shure that the old
1038          * paths are valid.
1039          */
1040         io_subchannel_init_config(sch);
1041         if (cio_commit_config(sch))
1042                 return;
1043
1044         /* We should also udate ssd info, but this has to wait. */
1045         /* Check if this is another device which appeared on the same sch. */
1046         if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {
1047                 PREPARE_WORK(&cdev->private->kick_work,
1048                              ccw_device_move_to_orphanage);
1049                 queue_work(slow_path_wq, &cdev->private->kick_work);
1050         } else
1051                 ccw_device_start_id(cdev, 0);
1052 }
1053
1054 static void
1055 ccw_device_offline_irq(struct ccw_device *cdev, enum dev_event dev_event)
1056 {
1057         struct subchannel *sch;
1058
1059         sch = to_subchannel(cdev->dev.parent);
1060         /*
1061          * An interrupt in state offline means a previous disable was not
1062          * successful - should not happen, but we try to disable again.
1063          */
1064         cio_disable_subchannel(sch);
1065 }
1066
1067 static void
1068 ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event)
1069 {
1070         retry_set_schib(cdev);
1071         cdev->private->state = DEV_STATE_ONLINE;
1072         dev_fsm_event(cdev, dev_event);
1073 }
1074
1075 static void ccw_device_update_cmfblock(struct ccw_device *cdev,
1076                                        enum dev_event dev_event)
1077 {
1078         cmf_retry_copy_block(cdev);
1079         cdev->private->state = DEV_STATE_ONLINE;
1080         dev_fsm_event(cdev, dev_event);
1081 }
1082
1083 static void
1084 ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
1085 {
1086         ccw_device_set_timeout(cdev, 0);
1087         if (dev_event == DEV_EVENT_NOTOPER)
1088                 cdev->private->state = DEV_STATE_NOT_OPER;
1089         else
1090                 cdev->private->state = DEV_STATE_OFFLINE;
1091         wake_up(&cdev->private->wait_q);
1092 }
1093
1094 static void
1095 ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event)
1096 {
1097         int ret;
1098
1099         ret = ccw_device_cancel_halt_clear(cdev);
1100         switch (ret) {
1101         case 0:
1102                 cdev->private->state = DEV_STATE_OFFLINE;
1103                 wake_up(&cdev->private->wait_q);
1104                 break;
1105         case -ENODEV:
1106                 cdev->private->state = DEV_STATE_NOT_OPER;
1107                 wake_up(&cdev->private->wait_q);
1108                 break;
1109         default:
1110                 ccw_device_set_timeout(cdev, HZ/10);
1111         }
1112 }
1113
1114 /*
1115  * No operation action. This is used e.g. to ignore a timeout event in
1116  * state offline.
1117  */
1118 static void
1119 ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
1120 {
1121 }
1122
1123 /*
1124  * Bug operation action. 
1125  */
1126 static void
1127 ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event)
1128 {
1129         CIO_MSG_EVENT(0, "Internal state [%i][%i] not handled for device "
1130                       "0.%x.%04x\n", cdev->private->state, dev_event,
1131                       cdev->private->dev_id.ssid,
1132                       cdev->private->dev_id.devno);
1133         BUG();
1134 }
1135
1136 /*
1137  * device statemachine
1138  */
1139 fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1140         [DEV_STATE_NOT_OPER] = {
1141                 [DEV_EVENT_NOTOPER]     = ccw_device_nop,
1142                 [DEV_EVENT_INTERRUPT]   = ccw_device_bug,
1143                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1144                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1145         },
1146         [DEV_STATE_SENSE_PGID] = {
1147                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1148                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_pgid_irq,
1149                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1150                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1151         },
1152         [DEV_STATE_SENSE_ID] = {
1153                 [DEV_EVENT_NOTOPER]     = ccw_device_recog_notoper,
1154                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_id_irq,
1155                 [DEV_EVENT_TIMEOUT]     = ccw_device_recog_timeout,
1156                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1157         },
1158         [DEV_STATE_OFFLINE] = {
1159                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1160                 [DEV_EVENT_INTERRUPT]   = ccw_device_offline_irq,
1161                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1162                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1163         },
1164         [DEV_STATE_VERIFY] = {
1165                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1166                 [DEV_EVENT_INTERRUPT]   = ccw_device_verify_irq,
1167                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1168                 [DEV_EVENT_VERIFY]      = ccw_device_delay_verify,
1169         },
1170         [DEV_STATE_ONLINE] = {
1171                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1172                 [DEV_EVENT_INTERRUPT]   = ccw_device_irq,
1173                 [DEV_EVENT_TIMEOUT]     = ccw_device_online_timeout,
1174                 [DEV_EVENT_VERIFY]      = ccw_device_online_verify,
1175         },
1176         [DEV_STATE_W4SENSE] = {
1177                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1178                 [DEV_EVENT_INTERRUPT]   = ccw_device_w4sense,
1179                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1180                 [DEV_EVENT_VERIFY]      = ccw_device_online_verify,
1181         },
1182         [DEV_STATE_DISBAND_PGID] = {
1183                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1184                 [DEV_EVENT_INTERRUPT]   = ccw_device_disband_irq,
1185                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1186                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1187         },
1188         [DEV_STATE_BOXED] = {
1189                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1190                 [DEV_EVENT_INTERRUPT]   = ccw_device_stlck_done,
1191                 [DEV_EVENT_TIMEOUT]     = ccw_device_stlck_done,
1192                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1193         },
1194         /* states to wait for i/o completion before doing something */
1195         [DEV_STATE_CLEAR_VERIFY] = {
1196                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1197                 [DEV_EVENT_INTERRUPT]   = ccw_device_clear_verify,
1198                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1199                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1200         },
1201         [DEV_STATE_TIMEOUT_KILL] = {
1202                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1203                 [DEV_EVENT_INTERRUPT]   = ccw_device_killing_irq,
1204                 [DEV_EVENT_TIMEOUT]     = ccw_device_killing_timeout,
1205                 [DEV_EVENT_VERIFY]      = ccw_device_nop, //FIXME
1206         },
1207         [DEV_STATE_QUIESCE] = {
1208                 [DEV_EVENT_NOTOPER]     = ccw_device_quiesce_done,
1209                 [DEV_EVENT_INTERRUPT]   = ccw_device_quiesce_done,
1210                 [DEV_EVENT_TIMEOUT]     = ccw_device_quiesce_timeout,
1211                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1212         },
1213         /* special states for devices gone not operational */
1214         [DEV_STATE_DISCONNECTED] = {
1215                 [DEV_EVENT_NOTOPER]     = ccw_device_nop,
1216                 [DEV_EVENT_INTERRUPT]   = ccw_device_start_id,
1217                 [DEV_EVENT_TIMEOUT]     = ccw_device_bug,
1218                 [DEV_EVENT_VERIFY]      = ccw_device_start_id,
1219         },
1220         [DEV_STATE_DISCONNECTED_SENSE_ID] = {
1221                 [DEV_EVENT_NOTOPER]     = ccw_device_recog_notoper,
1222                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_id_irq,
1223                 [DEV_EVENT_TIMEOUT]     = ccw_device_recog_timeout,
1224                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1225         },
1226         [DEV_STATE_CMFCHANGE] = {
1227                 [DEV_EVENT_NOTOPER]     = ccw_device_change_cmfstate,
1228                 [DEV_EVENT_INTERRUPT]   = ccw_device_change_cmfstate,
1229                 [DEV_EVENT_TIMEOUT]     = ccw_device_change_cmfstate,
1230                 [DEV_EVENT_VERIFY]      = ccw_device_change_cmfstate,
1231         },
1232         [DEV_STATE_CMFUPDATE] = {
1233                 [DEV_EVENT_NOTOPER]     = ccw_device_update_cmfblock,
1234                 [DEV_EVENT_INTERRUPT]   = ccw_device_update_cmfblock,
1235                 [DEV_EVENT_TIMEOUT]     = ccw_device_update_cmfblock,
1236                 [DEV_EVENT_VERIFY]      = ccw_device_update_cmfblock,
1237         },
1238 };
1239
1240 EXPORT_SYMBOL_GPL(ccw_device_set_timeout);