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