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         switch (state) {
 391         case DEV_STATE_BOXED:
 392                 CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n",
 393                               cdev->private->dev_id.devno, sch->schid.sch_no);
 394                 if (cdev->online && !ccw_device_notify(cdev, CIO_BOXED))
 395                         ccw_device_schedule_sch_unregister(cdev);
 396                 cdev->private->flags.donotify = 0;
 397                 break;
 398         case DEV_STATE_NOT_OPER:
 399                 CIO_MSG_EVENT(0, "Device %04x gone on subchannel %04x\n",
 400                               cdev->private->dev_id.devno, sch->schid.sch_no);
 401                 if (!ccw_device_notify(cdev, CIO_GONE))
 402                         ccw_device_schedule_sch_unregister(cdev);
 403                 else
 404                         ccw_device_set_disconnected(cdev);
 405                 cdev->private->flags.donotify = 0;
 406                 break;
 407         case DEV_STATE_DISCONNECTED:
 408                 CIO_MSG_EVENT(0, "Disconnected device %04x on subchannel "
 409                               "%04x\n", cdev->private->dev_id.devno,
 410                               sch->schid.sch_no);
 411                 if (!ccw_device_notify(cdev, CIO_NO_PATH))
 412                         ccw_device_schedule_sch_unregister(cdev);
 413                 else
 414                         ccw_device_set_disconnected(cdev);
 415                 cdev->private->flags.donotify = 0;
 416                 break;
 417         default:
 418                 break;
 419         }
 420
 421         if (cdev->private->flags.donotify) {
 422                 cdev->private->flags.donotify = 0;
 423                 ccw_device_oper_notify(cdev);
 424         }
 425         wake_up(&cdev->private->wait_q);
 426 }
 427
 428 static int cmp_pgid(struct pgid *p1, struct pgid *p2)
 429 {
 430         char *c1;
 431         char *c2;
 432
 433         c1 = (char *)p1;
 434         c2 = (char *)p2;
 435
 436         return memcmp(c1 + 1, c2 + 1, sizeof(struct pgid) - 1);
 437 }
 438
 439 static void __ccw_device_get_common_pgid(struct ccw_device *cdev)
 440 {
 441         int i;
 442         int last;
 443
 444         last = 0;
 445         for (i = 0; i < 8; i++) {
 446                 if (cdev->private->pgid[i].inf.ps.state1 == SNID_STATE1_RESET)
 447                         /* No PGID yet */
 448                         continue;
 449                 if (cdev->private->pgid[last].inf.ps.state1 ==
 450                     SNID_STATE1_RESET) {
 451                         /* First non-zero PGID */
 452                         last = i;
 453                         continue;
 454                 }
 455                 if (cmp_pgid(&cdev->private->pgid[i],
 456                              &cdev->private->pgid[last]) == 0)
 457                         /* Non-conflicting PGIDs */
 458                         continue;
 459
 460                 /* PGID mismatch, can't pathgroup. */
 461                 CIO_MSG_EVENT(0, "SNID - pgid mismatch for device "
 462                               "0.%x.%04x, can't pathgroup\n",
 463                               cdev->private->dev_id.ssid,
 464                               cdev->private->dev_id.devno);
 465                 cdev->private->options.pgroup = 0;
 466                 return;
 467         }
 468         if (cdev->private->pgid[last].inf.ps.state1 ==
 469             SNID_STATE1_RESET)
 470                 /* No previous pgid found */
 471                 memcpy(&cdev->private->pgid[0],
 472                        &channel_subsystems[0]->global_pgid,
 473                        sizeof(struct pgid));
 474         else
 475                 /* Use existing pgid */
 476                 memcpy(&cdev->private->pgid[0], &cdev->private->pgid[last],
 477                        sizeof(struct pgid));
 478 }
 479
 480 /*
 481  * Function called from device_pgid.c after sense path ground has completed.
 482  */
 483 void
 484 ccw_device_sense_pgid_done(struct ccw_device *cdev, int err)
 485 {
 486         struct subchannel *sch;
 487
 488         sch = to_subchannel(cdev->dev.parent);
 489         switch (err) {
 490         case -EOPNOTSUPP: /* path grouping not supported, use nop instead. */
 491                 cdev->private->options.pgroup = 0;
 492                 break;
 493         case 0: /* success */
 494         case -EACCES: /* partial success, some paths not operational */
 495                 /* Check if all pgids are equal or 0. */
 496                 __ccw_device_get_common_pgid(cdev);
 497                 break;
 498         case -ETIME:            /* Sense path group id stopped by timeout. */
 499         case -EUSERS:           /* device is reserved for someone else. */
 500                 ccw_device_done(cdev, DEV_STATE_BOXED);
 501                 return;
 502         default:
 503                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 504                 return;
 505         }
 506         /* Start Path Group verification. */
 507         cdev->private->state = DEV_STATE_VERIFY;
 508         cdev->private->flags.doverify = 0;
 509         ccw_device_verify_start(cdev);
 510 }
 511
 512 /*
 513  * Start device recognition.
 514  */
 515 int
 516 ccw_device_recognition(struct ccw_device *cdev)
 517 {
 518         struct subchannel *sch;
 519         int ret;
 520
 521         sch = to_subchannel(cdev->dev.parent);
 522         ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
 523         if (ret != 0)
 524                 /* Couldn't enable the subchannel for i/o. Sick device. */
 525                 return ret;
 526
 527         /* After 60s the device recognition is considered to have failed. */
 528         ccw_device_set_timeout(cdev, 60*HZ);
 529
 530         /*
 531          * We used to start here with a sense pgid to find out whether a device
 532          * is locked by someone else. Unfortunately, the sense pgid command
 533          * code has other meanings on devices predating the path grouping
 534          * algorithm, so we start with sense id and box the device after an
 535          * timeout (or if sense pgid during path verification detects the device
 536          * is locked, as may happen on newer devices).
 537          */
 538         cdev->private->flags.recog_done = 0;
 539         cdev->private->state = DEV_STATE_SENSE_ID;
 540         ccw_device_sense_id_start(cdev);
 541         return 0;
 542 }
 543
 544 /*
 545  * Handle timeout in device recognition.
 546  */
 547 static void
 548 ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 549 {
 550         int ret;
 551
 552         ret = ccw_device_cancel_halt_clear(cdev);
 553         switch (ret) {
 554         case 0:
 555                 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
 556                 break;
 557         case -ENODEV:
 558                 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
 559                 break;
 560         default:
 561                 ccw_device_set_timeout(cdev, 3*HZ);
 562         }
 563 }
 564
 565
 566 void
 567 ccw_device_verify_done(struct ccw_device *cdev, int err)
 568 {
 569         struct subchannel *sch;
 570
 571         sch = to_subchannel(cdev->dev.parent);
 572         /* Update schib - pom may have changed. */
 573         if (cio_update_schib(sch)) {
 574                 cdev->private->flags.donotify = 0;
 575                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 576                 return;
 577         }
 578         /* Update lpm with verified path mask. */
 579         sch->lpm = sch->vpm;
 580         /* Repeat path verification? */
 581         if (cdev->private->flags.doverify) {
 582                 cdev->private->flags.doverify = 0;
 583                 ccw_device_verify_start(cdev);
 584                 return;
 585         }
 586         switch (err) {
 587         case -EOPNOTSUPP: /* path grouping not supported, just set online. */
 588                 cdev->private->options.pgroup = 0;
 589         case 0:
 590                 ccw_device_done(cdev, DEV_STATE_ONLINE);
 591                 /* Deliver fake irb to device driver, if needed. */
 592                 if (cdev->private->flags.fake_irb) {
 593                         memset(&cdev->private->irb, 0, sizeof(struct irb));
 594                         cdev->private->irb.scsw.cmd.cc = 1;
 595                         cdev->private->irb.scsw.cmd.fctl = SCSW_FCTL_START_FUNC;
 596                         cdev->private->irb.scsw.cmd.actl = SCSW_ACTL_START_PEND;
 597                         cdev->private->irb.scsw.cmd.stctl =
 598                                 SCSW_STCTL_STATUS_PEND;
 599                         cdev->private->flags.fake_irb = 0;
 600                         if (cdev->handler)
 601                                 cdev->handler(cdev, cdev->private->intparm,
 602                                               &cdev->private->irb);
 603                         memset(&cdev->private->irb, 0, sizeof(struct irb));
 604                 }
 605                 break;
 606         case -ETIME:
 607                 /* Reset oper notify indication after verify error. */
 608                 cdev->private->flags.donotify = 0;
 609                 ccw_device_done(cdev, DEV_STATE_BOXED);
 610                 break;
 611         default:
 612                 /* Reset oper notify indication after verify error. */
 613                 cdev->private->flags.donotify = 0;
 614                 if (cdev->online) {
 615                         ccw_device_set_timeout(cdev, 0);
 616                         dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 617                 } else
 618                         ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 619                 break;
 620         }
 621 }
 622
 623 /*
 624  * Get device online.
 625  */
 626 int
 627 ccw_device_online(struct ccw_device *cdev)
 628 {
 629         struct subchannel *sch;
 630         int ret;
 631
 632         if ((cdev->private->state != DEV_STATE_OFFLINE) &&
 633             (cdev->private->state != DEV_STATE_BOXED))
 634                 return -EINVAL;
 635         sch = to_subchannel(cdev->dev.parent);
 636         ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
 637         if (ret != 0) {
 638                 /* Couldn't enable the subchannel for i/o. Sick device. */
 639                 if (ret == -ENODEV)
 640                         dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 641                 return ret;
 642         }
 643         /* Do we want to do path grouping? */
 644         if (!cdev->private->options.pgroup) {
 645                 /* Start initial path verification. */
 646                 cdev->private->state = DEV_STATE_VERIFY;
 647                 cdev->private->flags.doverify = 0;
 648                 ccw_device_verify_start(cdev);
 649                 return 0;
 650         }
 651         /* Do a SensePGID first. */
 652         cdev->private->state = DEV_STATE_SENSE_PGID;
 653         ccw_device_sense_pgid_start(cdev);
 654         return 0;
 655 }
 656
 657 void
 658 ccw_device_disband_done(struct ccw_device *cdev, int err)
 659 {
 660         switch (err) {
 661         case 0:
 662                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
 663                 break;
 664         case -ETIME:
 665                 ccw_device_done(cdev, DEV_STATE_BOXED);
 666                 break;
 667         default:
 668                 cdev->private->flags.donotify = 0;
 669                 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 670                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 671                 break;
 672         }
 673 }
 674
 675 /*
 676  * Shutdown device.
 677  */
 678 int
 679 ccw_device_offline(struct ccw_device *cdev)
 680 {
 681         struct subchannel *sch;
 682
 683         /* Allow ccw_device_offline while disconnected. */
 684         if (cdev->private->state == DEV_STATE_DISCONNECTED ||
 685             cdev->private->state == DEV_STATE_NOT_OPER) {
 686                 cdev->private->flags.donotify = 0;
 687                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 688                 return 0;
 689         }
 690         if (cdev->private->state == DEV_STATE_BOXED) {
 691                 ccw_device_done(cdev, DEV_STATE_BOXED);
 692                 return 0;
 693         }
 694         if (ccw_device_is_orphan(cdev)) {
 695                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
 696                 return 0;
 697         }
 698         sch = to_subchannel(cdev->dev.parent);
 699         if (cio_update_schib(sch))
 700                 return -ENODEV;
 701         if (scsw_actl(&sch->schib.scsw) != 0)
 702                 return -EBUSY;
 703         if (cdev->private->state != DEV_STATE_ONLINE)
 704                 return -EINVAL;
 705         /* Are we doing path grouping? */
 706         if (!cdev->private->options.pgroup) {
 707                 /* No, set state offline immediately. */
 708                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
 709                 return 0;
 710         }
 711         /* Start Set Path Group commands. */
 712         cdev->private->state = DEV_STATE_DISBAND_PGID;
 713         ccw_device_disband_start(cdev);
 714         return 0;
 715 }
 716
 717 /*
 718  * Handle timeout in device online/offline process.
 719  */
 720 static void
 721 ccw_device_onoff_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 722 {
 723         int ret;
 724
 725         ret = ccw_device_cancel_halt_clear(cdev);
 726         switch (ret) {
 727         case 0:
 728                 ccw_device_done(cdev, DEV_STATE_BOXED);
 729                 break;
 730         case -ENODEV:
 731                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 732                 break;
 733         default:
 734                 ccw_device_set_timeout(cdev, 3*HZ);
 735         }
 736 }
 737
 738 /*
 739  * Handle not oper event in device recognition.
 740  */
 741 static void
 742 ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event)
 743 {
 744         ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
 745 }
 746
 747 /*
 748  * Handle not operational event in non-special state.
 749  */
 750 static void ccw_device_generic_notoper(struct ccw_device *cdev,
 751                                        enum dev_event dev_event)
 752 {
 753         if (!ccw_device_notify(cdev, CIO_GONE))
 754                 ccw_device_schedule_sch_unregister(cdev);
 755         else
 756                 ccw_device_set_disconnected(cdev);
 757 }
 758
 759 /*
 760  * Handle path verification event in offline state.
 761  */
 762 static void ccw_device_offline_verify(struct ccw_device *cdev,
 763                                       enum dev_event dev_event)
 764 {
 765         struct subchannel *sch = to_subchannel(cdev->dev.parent);
 766
 767         css_schedule_eval(sch->schid);
 768 }
 769
 770 /*
 771  * Handle path verification event.
 772  */
 773 static void
 774 ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
 775 {
 776         struct subchannel *sch;
 777
 778         if (cdev->private->state == DEV_STATE_W4SENSE) {
 779                 cdev->private->flags.doverify = 1;
 780                 return;
 781         }
 782         sch = to_subchannel(cdev->dev.parent);
 783         /*
 784          * Since we might not just be coming from an interrupt from the
 785          * subchannel we have to update the schib.
 786          */
 787         if (cio_update_schib(sch)) {
 788                 ccw_device_verify_done(cdev, -ENODEV);
 789                 return;
 790         }
 791
 792         if (scsw_actl(&sch->schib.scsw) != 0 ||
 793             (scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) ||
 794             (scsw_stctl(&cdev->private->irb.scsw) & SCSW_STCTL_STATUS_PEND)) {
 795                 /*
 796                  * No final status yet or final status not yet delivered
 797                  * to the device driver. Can't do path verfication now,
 798                  * delay until final status was delivered.
 799                  */
 800                 cdev->private->flags.doverify = 1;
 801                 return;
 802         }
 803         /* Device is idle, we can do the path verification. */
 804         cdev->private->state = DEV_STATE_VERIFY;
 805         cdev->private->flags.doverify = 0;
 806         ccw_device_verify_start(cdev);
 807 }
 808
 809 /*
 810  * Got an interrupt for a normal io (state online).
 811  */
 812 static void
 813 ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event)
 814 {
 815         struct irb *irb;
 816         int is_cmd;
 817
 818         irb = (struct irb *) __LC_IRB;
 819         is_cmd = !scsw_is_tm(&irb->scsw);
 820         /* Check for unsolicited interrupt. */
 821         if (!scsw_is_solicited(&irb->scsw)) {
 822                 if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
 823                     !irb->esw.esw0.erw.cons) {
 824                         /* Unit check but no sense data. Need basic sense. */
 825                         if (ccw_device_do_sense(cdev, irb) != 0)
 826                                 goto call_handler_unsol;
 827                         memcpy(&cdev->private->irb, irb, sizeof(struct irb));
 828                         cdev->private->state = DEV_STATE_W4SENSE;
 829                         cdev->private->intparm = 0;
 830                         return;
 831                 }
 832 call_handler_unsol:
 833                 if (cdev->handler)
 834                         cdev->handler (cdev, 0, irb);
 835                 if (cdev->private->flags.doverify)
 836                         ccw_device_online_verify(cdev, 0);
 837                 return;
 838         }
 839         /* Accumulate status and find out if a basic sense is needed. */
 840         ccw_device_accumulate_irb(cdev, irb);
 841         if (is_cmd && cdev->private->flags.dosense) {
 842                 if (ccw_device_do_sense(cdev, irb) == 0) {
 843                         cdev->private->state = DEV_STATE_W4SENSE;
 844                 }
 845                 return;
 846         }
 847         /* Call the handler. */
 848         if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
 849                 /* Start delayed path verification. */
 850                 ccw_device_online_verify(cdev, 0);
 851 }
 852
 853 /*
 854  * Got an timeout in online state.
 855  */
 856 static void
 857 ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 858 {
 859         int ret;
 860
 861         ccw_device_set_timeout(cdev, 0);
 862         ret = ccw_device_cancel_halt_clear(cdev);
 863         if (ret == -EBUSY) {
 864                 ccw_device_set_timeout(cdev, 3*HZ);
 865                 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
 866                 return;
 867         }
 868         if (ret == -ENODEV)
 869                 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 870         else if (cdev->handler)
 871                 cdev->handler(cdev, cdev->private->intparm,
 872                               ERR_PTR(-ETIMEDOUT));
 873 }
 874
 875 /*
 876  * Got an interrupt for a basic sense.
 877  */
 878 static void
 879 ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
 880 {
 881         struct irb *irb;
 882
 883         irb = (struct irb *) __LC_IRB;
 884         /* Check for unsolicited interrupt. */
 885         if (scsw_stctl(&irb->scsw) ==
 886             (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
 887                 if (scsw_cc(&irb->scsw) == 1)
 888                         /* Basic sense hasn't started. Try again. */
 889                         ccw_device_do_sense(cdev, irb);
 890                 else {
 891                         CIO_MSG_EVENT(0, "0.%x.%04x: unsolicited "
 892                                       "interrupt during w4sense...\n",
 893                                       cdev->private->dev_id.ssid,
 894                                       cdev->private->dev_id.devno);
 895                         if (cdev->handler)
 896                                 cdev->handler (cdev, 0, irb);
 897                 }
 898                 return;
 899         }
 900         /*
 901          * Check if a halt or clear has been issued in the meanwhile. If yes,
 902          * only deliver the halt/clear interrupt to the device driver as if it
 903          * had killed the original request.
 904          */
 905         if (scsw_fctl(&irb->scsw) &
 906             (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
 907                 /* Retry Basic Sense if requested. */
 908                 if (cdev->private->flags.intretry) {
 909                         cdev->private->flags.intretry = 0;
 910                         ccw_device_do_sense(cdev, irb);
 911                         return;
 912                 }
 913                 cdev->private->flags.dosense = 0;
 914                 memset(&cdev->private->irb, 0, sizeof(struct irb));
 915                 ccw_device_accumulate_irb(cdev, irb);
 916                 goto call_handler;
 917         }
 918         /* Add basic sense info to irb. */
 919         ccw_device_accumulate_basic_sense(cdev, irb);
 920         if (cdev->private->flags.dosense) {
 921                 /* Another basic sense is needed. */
 922                 ccw_device_do_sense(cdev, irb);
 923                 return;
 924         }
 925 call_handler:
 926         cdev->private->state = DEV_STATE_ONLINE;
 927         /* In case sensing interfered with setting the device online */
 928         wake_up(&cdev->private->wait_q);
 929         /* Call the handler. */
 930         if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
 931                 /* Start delayed path verification. */
 932                 ccw_device_online_verify(cdev, 0);
 933 }
 934
 935 static void
 936 ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event)
 937 {
 938         struct irb *irb;
 939
 940         irb = (struct irb *) __LC_IRB;
 941         /* Accumulate status. We don't do basic sense. */
 942         ccw_device_accumulate_irb(cdev, irb);
 943         /* Remember to clear irb to avoid residuals. */
 944         memset(&cdev->private->irb, 0, sizeof(struct irb));
 945         /* Try to start delayed device verification. */
 946         ccw_device_online_verify(cdev, 0);
 947         /* Note: Don't call handler for cio initiated clear! */
 948 }
 949
 950 static void
 951 ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
 952 {
 953         struct subchannel *sch;
 954
 955         sch = to_subchannel(cdev->dev.parent);
 956         ccw_device_set_timeout(cdev, 0);
 957         /* Start delayed path verification. */
 958         ccw_device_online_verify(cdev, 0);
 959         /* OK, i/o is dead now. Call interrupt handler. */
 960         if (cdev->handler)
 961                 cdev->handler(cdev, cdev->private->intparm,
 962                               ERR_PTR(-EIO));
 963 }
 964
 965 static void
 966 ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 967 {
 968         int ret;
 969
 970         ret = ccw_device_cancel_halt_clear(cdev);
 971         if (ret == -EBUSY) {
 972                 ccw_device_set_timeout(cdev, 3*HZ);
 973                 return;
 974         }
 975         /* Start delayed path verification. */
 976         ccw_device_online_verify(cdev, 0);
 977         if (cdev->handler)
 978                 cdev->handler(cdev, cdev->private->intparm,
 979                               ERR_PTR(-EIO));
 980 }
 981
 982 void ccw_device_kill_io(struct ccw_device *cdev)
 983 {
 984         int ret;
 985
 986         ret = ccw_device_cancel_halt_clear(cdev);
 987         if (ret == -EBUSY) {
 988                 ccw_device_set_timeout(cdev, 3*HZ);
 989                 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
 990                 return;
 991         }
 992         /* Start delayed path verification. */
 993         ccw_device_online_verify(cdev, 0);
 994         if (cdev->handler)
 995                 cdev->handler(cdev, cdev->private->intparm,
 996                               ERR_PTR(-EIO));
 997 }
 998
 999 static void
1000 ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event)
1001 {
1002         /* Start verification after current task finished. */
1003         cdev->private->flags.doverify = 1;
1004 }
1005
1006 static void
1007 ccw_device_stlck_done(struct ccw_device *cdev, enum dev_event dev_event)
1008 {
1009         struct irb *irb;
1010
1011         switch (dev_event) {
1012         case DEV_EVENT_INTERRUPT:
1013                 irb = (struct irb *) __LC_IRB;
1014                 /* Check for unsolicited interrupt. */
1015                 if ((scsw_stctl(&irb->scsw) ==
1016                      (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) &&
1017                     (!scsw_cc(&irb->scsw)))
1018                         /* FIXME: we should restart stlck here, but this
1019                          * is extremely unlikely ... */
1020                         goto out_wakeup;
1021
1022                 ccw_device_accumulate_irb(cdev, irb);
1023                 /* We don't care about basic sense etc. */
1024                 break;
1025         default: /* timeout */
1026                 break;
1027         }
1028 out_wakeup:
1029         wake_up(&cdev->private->wait_q);
1030 }
1031
1032 static void
1033 ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
1034 {
1035         struct subchannel *sch;
1036
1037         sch = to_subchannel(cdev->dev.parent);
1038         if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0)
1039                 /* Couldn't enable the subchannel for i/o. Sick device. */
1040                 return;
1041
1042         /* After 60s the device recognition is considered to have failed. */
1043         ccw_device_set_timeout(cdev, 60*HZ);
1044
1045         cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
1046         ccw_device_sense_id_start(cdev);
1047 }
1048
1049 void ccw_device_trigger_reprobe(struct ccw_device *cdev)
1050 {
1051         struct subchannel *sch;
1052
1053         if (cdev->private->state != DEV_STATE_DISCONNECTED)
1054                 return;
1055
1056         sch = to_subchannel(cdev->dev.parent);
1057         /* Update some values. */
1058         if (cio_update_schib(sch))
1059                 return;
1060         /*
1061          * The pim, pam, pom values may not be accurate, but they are the best
1062          * we have before performing device selection :/
1063          */
1064         sch->lpm = sch->schib.pmcw.pam & sch->opm;
1065         /*
1066          * Use the initial configuration since we can't be shure that the old
1067          * paths are valid.
1068          */
1069         io_subchannel_init_config(sch);
1070         if (cio_commit_config(sch))
1071                 return;
1072
1073         /* We should also udate ssd info, but this has to wait. */
1074         /* Check if this is another device which appeared on the same sch. */
1075         if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {
1076                 PREPARE_WORK(&cdev->private->kick_work,
1077                              ccw_device_move_to_orphanage);
1078                 queue_work(slow_path_wq, &cdev->private->kick_work);
1079         } else
1080                 ccw_device_start_id(cdev, 0);
1081 }
1082
1083 static void ccw_device_disabled_irq(struct ccw_device *cdev,
1084                                     enum dev_event dev_event)
1085 {
1086         struct subchannel *sch;
1087
1088         sch = to_subchannel(cdev->dev.parent);
1089         /*
1090          * An interrupt in a disabled state means a previous disable was not
1091          * successful - should not happen, but we try to disable again.
1092          */
1093         cio_disable_subchannel(sch);
1094 }
1095
1096 static void
1097 ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event)
1098 {
1099         retry_set_schib(cdev);
1100         cdev->private->state = DEV_STATE_ONLINE;
1101         dev_fsm_event(cdev, dev_event);
1102 }
1103
1104 static void ccw_device_update_cmfblock(struct ccw_device *cdev,
1105                                        enum dev_event dev_event)
1106 {
1107         cmf_retry_copy_block(cdev);
1108         cdev->private->state = DEV_STATE_ONLINE;
1109         dev_fsm_event(cdev, dev_event);
1110 }
1111
1112 static void
1113 ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
1114 {
1115         ccw_device_set_timeout(cdev, 0);
1116         if (dev_event == DEV_EVENT_NOTOPER)
1117                 cdev->private->state = DEV_STATE_NOT_OPER;
1118         else
1119                 cdev->private->state = DEV_STATE_OFFLINE;
1120         wake_up(&cdev->private->wait_q);
1121 }
1122
1123 static void
1124 ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event)
1125 {
1126         int ret;
1127
1128         ret = ccw_device_cancel_halt_clear(cdev);
1129         switch (ret) {
1130         case 0:
1131                 cdev->private->state = DEV_STATE_OFFLINE;
1132                 wake_up(&cdev->private->wait_q);
1133                 break;
1134         case -ENODEV:
1135                 cdev->private->state = DEV_STATE_NOT_OPER;
1136                 wake_up(&cdev->private->wait_q);
1137                 break;
1138         default:
1139                 ccw_device_set_timeout(cdev, HZ/10);
1140         }
1141 }
1142
1143 /*
1144  * No operation action. This is used e.g. to ignore a timeout event in
1145  * state offline.
1146  */
1147 static void
1148 ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
1149 {
1150 }
1151
1152 /*
1153  * device statemachine
1154  */
1155 fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1156         [DEV_STATE_NOT_OPER] = {
1157                 [DEV_EVENT_NOTOPER]     = ccw_device_nop,
1158                 [DEV_EVENT_INTERRUPT]   = ccw_device_disabled_irq,
1159                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1160                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1161         },
1162         [DEV_STATE_SENSE_PGID] = {
1163                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1164                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_pgid_irq,
1165                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1166                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1167         },
1168         [DEV_STATE_SENSE_ID] = {
1169                 [DEV_EVENT_NOTOPER]     = ccw_device_recog_notoper,
1170                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_id_irq,
1171                 [DEV_EVENT_TIMEOUT]     = ccw_device_recog_timeout,
1172                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1173         },
1174         [DEV_STATE_OFFLINE] = {
1175                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1176                 [DEV_EVENT_INTERRUPT]   = ccw_device_disabled_irq,
1177                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1178                 [DEV_EVENT_VERIFY]      = ccw_device_offline_verify,
1179         },
1180         [DEV_STATE_VERIFY] = {
1181                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1182                 [DEV_EVENT_INTERRUPT]   = ccw_device_verify_irq,
1183                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1184                 [DEV_EVENT_VERIFY]      = ccw_device_delay_verify,
1185         },
1186         [DEV_STATE_ONLINE] = {
1187                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1188                 [DEV_EVENT_INTERRUPT]   = ccw_device_irq,
1189                 [DEV_EVENT_TIMEOUT]     = ccw_device_online_timeout,
1190                 [DEV_EVENT_VERIFY]      = ccw_device_online_verify,
1191         },
1192         [DEV_STATE_W4SENSE] = {
1193                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1194                 [DEV_EVENT_INTERRUPT]   = ccw_device_w4sense,
1195                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1196                 [DEV_EVENT_VERIFY]      = ccw_device_online_verify,
1197         },
1198         [DEV_STATE_DISBAND_PGID] = {
1199                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1200                 [DEV_EVENT_INTERRUPT]   = ccw_device_disband_irq,
1201                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1202                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1203         },
1204         [DEV_STATE_BOXED] = {
1205                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1206                 [DEV_EVENT_INTERRUPT]   = ccw_device_stlck_done,
1207                 [DEV_EVENT_TIMEOUT]     = ccw_device_stlck_done,
1208                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1209         },
1210         /* states to wait for i/o completion before doing something */
1211         [DEV_STATE_CLEAR_VERIFY] = {
1212                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1213                 [DEV_EVENT_INTERRUPT]   = ccw_device_clear_verify,
1214                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1215                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1216         },
1217         [DEV_STATE_TIMEOUT_KILL] = {
1218                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1219                 [DEV_EVENT_INTERRUPT]   = ccw_device_killing_irq,
1220                 [DEV_EVENT_TIMEOUT]     = ccw_device_killing_timeout,
1221                 [DEV_EVENT_VERIFY]      = ccw_device_nop, //FIXME
1222         },
1223         [DEV_STATE_QUIESCE] = {
1224                 [DEV_EVENT_NOTOPER]     = ccw_device_quiesce_done,
1225                 [DEV_EVENT_INTERRUPT]   = ccw_device_quiesce_done,
1226                 [DEV_EVENT_TIMEOUT]     = ccw_device_quiesce_timeout,
1227                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1228         },
1229         /* special states for devices gone not operational */
1230         [DEV_STATE_DISCONNECTED] = {
1231                 [DEV_EVENT_NOTOPER]     = ccw_device_nop,
1232                 [DEV_EVENT_INTERRUPT]   = ccw_device_start_id,
1233                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1234                 [DEV_EVENT_VERIFY]      = ccw_device_start_id,
1235         },
1236         [DEV_STATE_DISCONNECTED_SENSE_ID] = {
1237                 [DEV_EVENT_NOTOPER]     = ccw_device_recog_notoper,
1238                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_id_irq,
1239                 [DEV_EVENT_TIMEOUT]     = ccw_device_recog_timeout,
1240                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1241         },
1242         [DEV_STATE_CMFCHANGE] = {
1243                 [DEV_EVENT_NOTOPER]     = ccw_device_change_cmfstate,
1244                 [DEV_EVENT_INTERRUPT]   = ccw_device_change_cmfstate,
1245                 [DEV_EVENT_TIMEOUT]     = ccw_device_change_cmfstate,
1246                 [DEV_EVENT_VERIFY]      = ccw_device_change_cmfstate,
1247         },
1248         [DEV_STATE_CMFUPDATE] = {
1249                 [DEV_EVENT_NOTOPER]     = ccw_device_update_cmfblock,
1250                 [DEV_EVENT_INTERRUPT]   = ccw_device_update_cmfblock,
1251                 [DEV_EVENT_TIMEOUT]     = ccw_device_update_cmfblock,
1252                 [DEV_EVENT_VERIFY]      = ccw_device_update_cmfblock,
1253         },
1254 };
1255
1256 EXPORT_SYMBOL_GPL(ccw_device_set_timeout);