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