drivers/s390/cio/device_fsm.c

   1 /*
   2  * drivers/s390/cio/device_fsm.c
   3  * finite state machine for device handling
   4  *
   5  *    Copyright IBM Corp. 2002,2008
   6  *    Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)
   7  *               Martin Schwidefsky (schwidefsky@de.ibm.com)
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/init.h>
  12 #include <linux/jiffies.h>
  13 #include <linux/string.h>
  14
  15 #include <asm/ccwdev.h>
  16 #include <asm/cio.h>
  17 #include <asm/chpid.h>
  18
  19 #include "cio.h"
  20 #include "cio_debug.h"
  21 #include "css.h"
  22 #include "device.h"
  23 #include "chsc.h"
  24 #include "ioasm.h"
  25 #include "chp.h"
  26
  27 static int timeout_log_enabled;
  28
  29 static int __init ccw_timeout_log_setup(char *unused)
  30 {
  31         timeout_log_enabled = 1;
  32         return 1;
  33 }
  34
  35 __setup("ccw_timeout_log", ccw_timeout_log_setup);
  36
  37 static void ccw_timeout_log(struct ccw_device *cdev)
  38 {
  39         struct schib schib;
  40         struct subchannel *sch;
  41         struct io_subchannel_private *private;
  42         union orb *orb;
  43         int cc;
  44
  45         sch = to_subchannel(cdev->dev.parent);
  46         private = to_io_private(sch);
  47         orb = &private->orb;
  48         cc = stsch(sch->schid, &schib);
  49
  50         printk(KERN_WARNING "cio: ccw device timeout occurred at %llx, "
  51                "device information:\n", get_clock());
  52         printk(KERN_WARNING "cio: orb:\n");
  53         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
  54                        orb, sizeof(*orb), 0);
  55         printk(KERN_WARNING "cio: ccw device bus id: %s\n",
  56                dev_name(&cdev->dev));
  57         printk(KERN_WARNING "cio: subchannel bus id: %s\n",
  58                dev_name(&sch->dev));
  59         printk(KERN_WARNING "cio: subchannel lpm: %02x, opm: %02x, "
  60                "vpm: %02x\n", sch->lpm, sch->opm, sch->vpm);
  61
  62         if (orb->tm.b) {
  63                 printk(KERN_WARNING "cio: orb indicates transport mode\n");
  64                 printk(KERN_WARNING "cio: last tcw:\n");
  65                 print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
  66                                (void *)(addr_t)orb->tm.tcw,
  67                                sizeof(struct tcw), 0);
  68         } else {
  69                 printk(KERN_WARNING "cio: orb indicates command mode\n");
  70                 if ((void *)(addr_t)orb->cmd.cpa == &private->sense_ccw ||
  71                     (void *)(addr_t)orb->cmd.cpa == cdev->private->iccws)
  72                         printk(KERN_WARNING "cio: last channel program "
  73                                "(intern):\n");
  74                 else
  75                         printk(KERN_WARNING "cio: last channel program:\n");
  76
  77                 print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
  78                                (void *)(addr_t)orb->cmd.cpa,
  79                                sizeof(struct ccw1), 0);
  80         }
  81         printk(KERN_WARNING "cio: ccw device state: %d\n",
  82                cdev->private->state);
  83         printk(KERN_WARNING "cio: store subchannel returned: cc=%d\n", cc);
  84         printk(KERN_WARNING "cio: schib:\n");
  85         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
  86                        &schib, sizeof(schib), 0);
  87         printk(KERN_WARNING "cio: ccw device flags:\n");
  88         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
  89                        &cdev->private->flags, sizeof(cdev->private->flags), 0);
  90 }
  91
  92 /*
  93  * Timeout function. It just triggers a DEV_EVENT_TIMEOUT.
  94  */
  95 static void
  96 ccw_device_timeout(unsigned long data)
  97 {
  98         struct ccw_device *cdev;
  99
 100         cdev = (struct ccw_device *) data;
 101         spin_lock_irq(cdev->ccwlock);
 102         if (timeout_log_enabled)
 103                 ccw_timeout_log(cdev);
 104         dev_fsm_event(cdev, DEV_EVENT_TIMEOUT);
 105         spin_unlock_irq(cdev->ccwlock);
 106 }
 107
 108 /*
 109  * Set timeout
 110  */
 111 void
 112 ccw_device_set_timeout(struct ccw_device *cdev, int expires)
 113 {
 114         if (expires == 0) {
 115                 del_timer(&cdev->private->timer);
 116                 return;
 117         }
 118         if (timer_pending(&cdev->private->timer)) {
 119                 if (mod_timer(&cdev->private->timer, jiffies + expires))
 120                         return;
 121         }
 122         cdev->private->timer.function = ccw_device_timeout;
 123         cdev->private->timer.data = (unsigned long) cdev;
 124         cdev->private->timer.expires = jiffies + expires;
 125         add_timer(&cdev->private->timer);
 126 }
 127
 128 /*
 129  * Cancel running i/o. This is called repeatedly since halt/clear are
 130  * asynchronous operations. We do one try with cio_cancel, two tries
 131  * with cio_halt, 255 tries with cio_clear. If everythings fails panic.
 132  * Returns 0 if device now idle, -ENODEV for device not operational and
 133  * -EBUSY if an interrupt is expected (either from halt/clear or from a
 134  * status pending).
 135  */
 136 int
 137 ccw_device_cancel_halt_clear(struct ccw_device *cdev)
 138 {
 139         struct subchannel *sch;
 140         int ret;
 141
 142         sch = to_subchannel(cdev->dev.parent);
 143         if (cio_update_schib(sch))
 144                 return -ENODEV;
 145         if (!sch->schib.pmcw.ena)
 146                 /* Not operational -> done. */
 147                 return 0;
 148         /* Stage 1: cancel io. */
 149         if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_HALT_PEND) &&
 150             !(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
 151                 if (!scsw_is_tm(&sch->schib.scsw)) {
 152                         ret = cio_cancel(sch);
 153                         if (ret != -EINVAL)
 154                                 return ret;
 155                 }
 156                 /* cancel io unsuccessful or not applicable (transport mode).
 157                  * Continue with asynchronous instructions. */
 158                 cdev->private->iretry = 3;      /* 3 halt retries. */
 159         }
 160         if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
 161                 /* Stage 2: halt io. */
 162                 if (cdev->private->iretry) {
 163                         cdev->private->iretry--;
 164                         ret = cio_halt(sch);
 165                         if (ret != -EBUSY)
 166                                 return (ret == 0) ? -EBUSY : ret;
 167                 }
 168                 /* halt io unsuccessful. */
 169                 cdev->private->iretry = 255;    /* 255 clear retries. */
 170         }
 171         /* Stage 3: clear io. */
 172         if (cdev->private->iretry) {
 173                 cdev->private->iretry--;
 174                 ret = cio_clear (sch);
 175                 return (ret == 0) ? -EBUSY : ret;
 176         }
 177         panic("Can't stop i/o on subchannel.\n");
 178 }
 179
 180 static int
 181 ccw_device_handle_oper(struct ccw_device *cdev)
 182 {
 183         struct subchannel *sch;
 184
 185         sch = to_subchannel(cdev->dev.parent);
 186         cdev->private->flags.recog_done = 1;
 187         /*
 188          * Check if cu type and device type still match. If
 189          * not, it is certainly another device and we have to
 190          * de- and re-register.
 191          */
 192         if (cdev->id.cu_type != cdev->private->senseid.cu_type ||
 193             cdev->id.cu_model != cdev->private->senseid.cu_model ||
 194             cdev->id.dev_type != cdev->private->senseid.dev_type ||
 195             cdev->id.dev_model != cdev->private->senseid.dev_model) {
 196                 PREPARE_WORK(&cdev->private->kick_work,
 197                              ccw_device_do_unbind_bind);
 198                 queue_work(ccw_device_work, &cdev->private->kick_work);
 199                 return 0;
 200         }
 201         cdev->private->flags.donotify = 1;
 202         return 1;
 203 }
 204
 205 /*
 206  * The machine won't give us any notification by machine check if a chpid has
 207  * been varied online on the SE so we have to find out by magic (i. e. driving
 208  * the channel subsystem to device selection and updating our path masks).
 209  */
 210 static void
 211 __recover_lost_chpids(struct subchannel *sch, int old_lpm)
 212 {
 213         int mask, i;
 214         struct chp_id chpid;
 215
 216         chp_id_init(&chpid);
 217         for (i = 0; i<8; i++) {
 218                 mask = 0x80 >> i;
 219                 if (!(sch->lpm & mask))
 220                         continue;
 221                 if (old_lpm & mask)
 222                         continue;
 223                 chpid.id = sch->schib.pmcw.chpid[i];
 224                 if (!chp_is_registered(chpid))
 225                         css_schedule_eval_all();
 226         }
 227 }
 228
 229 /*
 230  * Stop device recognition.
 231  */
 232 static void
 233 ccw_device_recog_done(struct ccw_device *cdev, int state)
 234 {
 235         struct subchannel *sch;
 236         int notify, old_lpm, same_dev;
 237
 238         sch = to_subchannel(cdev->dev.parent);
 239
 240         ccw_device_set_timeout(cdev, 0);
 241         cio_disable_subchannel(sch);
 242         /*
 243          * Now that we tried recognition, we have performed device selection
 244          * through ssch() and the path information is up to date.
 245          */
 246         old_lpm = sch->lpm;
 247
 248         /* Check since device may again have become not operational. */
 249         if (cio_update_schib(sch))
 250                 state = DEV_STATE_NOT_OPER;
 251         else
 252                 sch->lpm = sch->schib.pmcw.pam & sch->opm;
 253
 254         if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID)
 255                 /* Force reprobe on all chpids. */
 256                 old_lpm = 0;
 257         if (sch->lpm != old_lpm)
 258                 __recover_lost_chpids(sch, old_lpm);
 259         if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID &&
 260             (state == DEV_STATE_NOT_OPER || state == DEV_STATE_BOXED)) {
 261                 cdev->private->flags.recog_done = 1;
 262                 cdev->private->state = DEV_STATE_DISCONNECTED;
 263                 wake_up(&cdev->private->wait_q);
 264                 return;
 265         }
 266         notify = 0;
 267         same_dev = 0; /* Keep the compiler quiet... */
 268         switch (state) {
 269         case DEV_STATE_NOT_OPER:
 270                 CIO_MSG_EVENT(2, "SenseID : unknown device %04x on "
 271                               "subchannel 0.%x.%04x\n",
 272                               cdev->private->dev_id.devno,
 273                               sch->schid.ssid, sch->schid.sch_no);
 274                 break;
 275         case DEV_STATE_OFFLINE:
 276                 if (cdev->online) {
 277                         same_dev = ccw_device_handle_oper(cdev);
 278                         notify = 1;
 279                 }
 280                 /* fill out sense information */
 281                 memset(&cdev->id, 0, sizeof(cdev->id));
 282                 cdev->id.cu_type   = cdev->private->senseid.cu_type;
 283                 cdev->id.cu_model  = cdev->private->senseid.cu_model;
 284                 cdev->id.dev_type  = cdev->private->senseid.dev_type;
 285                 cdev->id.dev_model = cdev->private->senseid.dev_model;
 286                 if (notify) {
 287                         cdev->private->state = DEV_STATE_OFFLINE;
 288                         if (same_dev) {
 289                                 /* Get device online again. */
 290                                 ccw_device_online(cdev);
 291                                 wake_up(&cdev->private->wait_q);
 292                         }
 293                         return;
 294                 }
 295                 /* Issue device info message. */
 296                 CIO_MSG_EVENT(4, "SenseID : device 0.%x.%04x reports: "
 297                               "CU  Type/Mod = %04X/%02X, Dev Type/Mod = "
 298                               "%04X/%02X\n",
 299                               cdev->private->dev_id.ssid,
 300                               cdev->private->dev_id.devno,
 301                               cdev->id.cu_type, cdev->id.cu_model,
 302                               cdev->id.dev_type, cdev->id.dev_model);
 303                 break;
 304         case DEV_STATE_BOXED:
 305                 CIO_MSG_EVENT(0, "SenseID : boxed device %04x on "
 306                               " subchannel 0.%x.%04x\n",
 307                               cdev->private->dev_id.devno,
 308                               sch->schid.ssid, sch->schid.sch_no);
 309                 if (cdev->id.cu_type != 0) { /* device was recognized before */
 310                         cdev->private->flags.recog_done = 1;
 311                         cdev->private->state = DEV_STATE_BOXED;
 312                         wake_up(&cdev->private->wait_q);
 313                         return;
 314                 }
 315                 break;
 316         }
 317         cdev->private->state = state;
 318         io_subchannel_recog_done(cdev);
 319         wake_up(&cdev->private->wait_q);
 320 }
 321
 322 /*
 323  * Function called from device_id.c after sense id has completed.
 324  */
 325 void
 326 ccw_device_sense_id_done(struct ccw_device *cdev, int err)
 327 {
 328         switch (err) {
 329         case 0:
 330                 ccw_device_recog_done(cdev, DEV_STATE_OFFLINE);
 331                 break;
 332         case -ETIME:            /* Sense id stopped by timeout. */
 333                 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
 334                 break;
 335         default:
 336                 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
 337                 break;
 338         }
 339 }
 340
 341 int ccw_device_notify(struct ccw_device *cdev, int event)
 342 {
 343         if (!cdev->drv)
 344                 return 0;
 345         if (!cdev->online)
 346                 return 0;
 347         CIO_MSG_EVENT(2, "notify called for 0.%x.%04x, event=%d\n",
 348                       cdev->private->dev_id.ssid, cdev->private->dev_id.devno,
 349                       event);
 350         return cdev->drv->notify ? cdev->drv->notify(cdev, event) : 0;
 351 }
 352
 353 static void cmf_reenable_delayed(struct work_struct *work)
 354 {
 355         struct ccw_device_private *priv;
 356         struct ccw_device *cdev;
 357
 358         priv = container_of(work, struct ccw_device_private, kick_work);
 359         cdev = priv->cdev;
 360         cmf_reenable(cdev);
 361 }
 362
 363 static void ccw_device_oper_notify(struct ccw_device *cdev)
 364 {
 365         if (ccw_device_notify(cdev, CIO_OPER)) {
 366                 /* Reenable channel measurements, if needed. */
 367                 PREPARE_WORK(&cdev->private->kick_work, cmf_reenable_delayed);
 368                 queue_work(ccw_device_work, &cdev->private->kick_work);
 369                 return;
 370         }
 371         /* Driver doesn't want device back. */
 372         ccw_device_set_notoper(cdev);
 373         PREPARE_WORK(&cdev->private->kick_work, ccw_device_do_unbind_bind);
 374         queue_work(ccw_device_work, &cdev->private->kick_work);
 375 }
 376
 377 /*
 378  * Finished with online/offline processing.
 379  */
 380 static void
 381 ccw_device_done(struct ccw_device *cdev, int state)
 382 {
 383         struct subchannel *sch;
 384
 385         sch = to_subchannel(cdev->dev.parent);
 386
 387         ccw_device_set_timeout(cdev, 0);
 388
 389         if (state != DEV_STATE_ONLINE)
 390                 cio_disable_subchannel(sch);
 391
 392         /* Reset device status. */
 393         memset(&cdev->private->irb, 0, sizeof(struct irb));
 394
 395         cdev->private->state = state;
 396
 397         if (state == DEV_STATE_BOXED) {
 398                 CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n",
 399                               cdev->private->dev_id.devno, sch->schid.sch_no);
 400                 if (cdev->online && !ccw_device_notify(cdev, CIO_BOXED))
 401                         ccw_device_schedule_sch_unregister(cdev);
 402                 cdev->private->flags.donotify = 0;
 403         }
 404
 405         if (cdev->private->flags.donotify) {
 406                 cdev->private->flags.donotify = 0;
 407                 ccw_device_oper_notify(cdev);
 408         }
 409         wake_up(&cdev->private->wait_q);
 410 }
 411
 412 static int cmp_pgid(struct pgid *p1, struct pgid *p2)
 413 {
 414         char *c1;
 415         char *c2;
 416
 417         c1 = (char *)p1;
 418         c2 = (char *)p2;
 419
 420         return memcmp(c1 + 1, c2 + 1, sizeof(struct pgid) - 1);
 421 }
 422
 423 static void __ccw_device_get_common_pgid(struct ccw_device *cdev)
 424 {
 425         int i;
 426         int last;
 427
 428         last = 0;
 429         for (i = 0; i < 8; i++) {
 430                 if (cdev->private->pgid[i].inf.ps.state1 == SNID_STATE1_RESET)
 431                         /* No PGID yet */
 432                         continue;
 433                 if (cdev->private->pgid[last].inf.ps.state1 ==
 434                     SNID_STATE1_RESET) {
 435                         /* First non-zero PGID */
 436                         last = i;
 437                         continue;
 438                 }
 439                 if (cmp_pgid(&cdev->private->pgid[i],
 440                              &cdev->private->pgid[last]) == 0)
 441                         /* Non-conflicting PGIDs */
 442                         continue;
 443
 444                 /* PGID mismatch, can't pathgroup. */
 445                 CIO_MSG_EVENT(0, "SNID - pgid mismatch for device "
 446                               "0.%x.%04x, can't pathgroup\n",
 447                               cdev->private->dev_id.ssid,
 448                               cdev->private->dev_id.devno);
 449                 cdev->private->options.pgroup = 0;
 450                 return;
 451         }
 452         if (cdev->private->pgid[last].inf.ps.state1 ==
 453             SNID_STATE1_RESET)
 454                 /* No previous pgid found */
 455                 memcpy(&cdev->private->pgid[0],
 456                        &channel_subsystems[0]->global_pgid,
 457                        sizeof(struct pgid));
 458         else
 459                 /* Use existing pgid */
 460                 memcpy(&cdev->private->pgid[0], &cdev->private->pgid[last],
 461                        sizeof(struct pgid));
 462 }
 463
 464 /*
 465  * Function called from device_pgid.c after sense path ground has completed.
 466  */
 467 void
 468 ccw_device_sense_pgid_done(struct ccw_device *cdev, int err)
 469 {
 470         struct subchannel *sch;
 471
 472         sch = to_subchannel(cdev->dev.parent);
 473         switch (err) {
 474         case -EOPNOTSUPP: /* path grouping not supported, use nop instead. */
 475                 cdev->private->options.pgroup = 0;
 476                 break;
 477         case 0: /* success */
 478         case -EACCES: /* partial success, some paths not operational */
 479                 /* Check if all pgids are equal or 0. */
 480                 __ccw_device_get_common_pgid(cdev);
 481                 break;
 482         case -ETIME:            /* Sense path group id stopped by timeout. */
 483         case -EUSERS:           /* device is reserved for someone else. */
 484                 ccw_device_done(cdev, DEV_STATE_BOXED);
 485                 return;
 486         default:
 487                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 488                 return;
 489         }
 490         /* Start Path Group verification. */
 491         cdev->private->state = DEV_STATE_VERIFY;
 492         cdev->private->flags.doverify = 0;
 493         ccw_device_verify_start(cdev);
 494 }
 495
 496 /*
 497  * Start device recognition.
 498  */
 499 int
 500 ccw_device_recognition(struct ccw_device *cdev)
 501 {
 502         struct subchannel *sch;
 503         int ret;
 504
 505         if ((cdev->private->state != DEV_STATE_NOT_OPER) &&
 506             (cdev->private->state != DEV_STATE_BOXED))
 507                 return -EINVAL;
 508         sch = to_subchannel(cdev->dev.parent);
 509         ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
 510         if (ret != 0)
 511                 /* Couldn't enable the subchannel for i/o. Sick device. */
 512                 return ret;
 513
 514         /* After 60s the device recognition is considered to have failed. */
 515         ccw_device_set_timeout(cdev, 60*HZ);
 516
 517         /*
 518          * We used to start here with a sense pgid to find out whether a device
 519          * is locked by someone else. Unfortunately, the sense pgid command
 520          * code has other meanings on devices predating the path grouping
 521          * algorithm, so we start with sense id and box the device after an
 522          * timeout (or if sense pgid during path verification detects the device
 523          * is locked, as may happen on newer devices).
 524          */
 525         cdev->private->flags.recog_done = 0;
 526         cdev->private->state = DEV_STATE_SENSE_ID;
 527         ccw_device_sense_id_start(cdev);
 528         return 0;
 529 }
 530
 531 /*
 532  * Handle timeout in device recognition.
 533  */
 534 static void
 535 ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 536 {
 537         int ret;
 538
 539         ret = ccw_device_cancel_halt_clear(cdev);
 540         switch (ret) {
 541         case 0:
 542                 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
 543                 break;
 544         case -ENODEV:
 545                 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
 546                 break;
 547         default:
 548                 ccw_device_set_timeout(cdev, 3*HZ);
 549         }
 550 }
 551
 552
 553 void
 554 ccw_device_verify_done(struct ccw_device *cdev, int err)
 555 {
 556         struct subchannel *sch;
 557
 558         sch = to_subchannel(cdev->dev.parent);
 559         /* Update schib - pom may have changed. */
 560         if (cio_update_schib(sch)) {
 561                 cdev->private->flags.donotify = 0;
 562                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 563                 return;
 564         }
 565         /* Update lpm with verified path mask. */
 566         sch->lpm = sch->vpm;
 567         /* Repeat path verification? */
 568         if (cdev->private->flags.doverify) {
 569                 cdev->private->flags.doverify = 0;
 570                 ccw_device_verify_start(cdev);
 571                 return;
 572         }
 573         switch (err) {
 574         case -EOPNOTSUPP: /* path grouping not supported, just set online. */
 575                 cdev->private->options.pgroup = 0;
 576         case 0:
 577                 ccw_device_done(cdev, DEV_STATE_ONLINE);
 578                 /* Deliver fake irb to device driver, if needed. */
 579                 if (cdev->private->flags.fake_irb) {
 580                         memset(&cdev->private->irb, 0, sizeof(struct irb));
 581                         cdev->private->irb.scsw.cmd.cc = 1;
 582                         cdev->private->irb.scsw.cmd.fctl = SCSW_FCTL_START_FUNC;
 583                         cdev->private->irb.scsw.cmd.actl = SCSW_ACTL_START_PEND;
 584                         cdev->private->irb.scsw.cmd.stctl =
 585                                 SCSW_STCTL_STATUS_PEND;
 586                         cdev->private->flags.fake_irb = 0;
 587                         if (cdev->handler)
 588                                 cdev->handler(cdev, cdev->private->intparm,
 589                                               &cdev->private->irb);
 590                         memset(&cdev->private->irb, 0, sizeof(struct irb));
 591                 }
 592                 break;
 593         case -ETIME:
 594                 /* Reset oper notify indication after verify error. */
 595                 cdev->private->flags.donotify = 0;
 596                 ccw_device_done(cdev, DEV_STATE_BOXED);
 597                 break;
 598         default:
 599                 /* Reset oper notify indication after verify error. */
 600                 cdev->private->flags.donotify = 0;
 601                 if (cdev->online) {
 602                         ccw_device_set_timeout(cdev, 0);
 603                         dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 604                 } else
 605                         ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 606                 break;
 607         }
 608 }
 609
 610 /*
 611  * Get device online.
 612  */
 613 int
 614 ccw_device_online(struct ccw_device *cdev)
 615 {
 616         struct subchannel *sch;
 617         int ret;
 618
 619         if ((cdev->private->state != DEV_STATE_OFFLINE) &&
 620             (cdev->private->state != DEV_STATE_BOXED))
 621                 return -EINVAL;
 622         sch = to_subchannel(cdev->dev.parent);
 623         ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
 624         if (ret != 0) {
 625                 /* Couldn't enable the subchannel for i/o. Sick device. */
 626                 if (ret == -ENODEV)
 627                         dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 628                 return ret;
 629         }
 630         /* Do we want to do path grouping? */
 631         if (!cdev->private->options.pgroup) {
 632                 /* Start initial path verification. */
 633                 cdev->private->state = DEV_STATE_VERIFY;
 634                 cdev->private->flags.doverify = 0;
 635                 ccw_device_verify_start(cdev);
 636                 return 0;
 637         }
 638         /* Do a SensePGID first. */
 639         cdev->private->state = DEV_STATE_SENSE_PGID;
 640         ccw_device_sense_pgid_start(cdev);
 641         return 0;
 642 }
 643
 644 void
 645 ccw_device_disband_done(struct ccw_device *cdev, int err)
 646 {
 647         switch (err) {
 648         case 0:
 649                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
 650                 break;
 651         case -ETIME:
 652                 ccw_device_done(cdev, DEV_STATE_BOXED);
 653                 break;
 654         default:
 655                 cdev->private->flags.donotify = 0;
 656                 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 657                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 658                 break;
 659         }
 660 }
 661
 662 /*
 663  * Shutdown device.
 664  */
 665 int
 666 ccw_device_offline(struct ccw_device *cdev)
 667 {
 668         struct subchannel *sch;
 669
 670         /* Allow ccw_device_offline while disconnected. */
 671         if (cdev->private->state == DEV_STATE_DISCONNECTED ||
 672             cdev->private->state == DEV_STATE_NOT_OPER) {
 673                 cdev->private->flags.donotify = 0;
 674                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 675                 return 0;
 676         }
 677         if (ccw_device_is_orphan(cdev)) {
 678                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
 679                 return 0;
 680         }
 681         sch = to_subchannel(cdev->dev.parent);
 682         if (cio_update_schib(sch))
 683                 return -ENODEV;
 684         if (scsw_actl(&sch->schib.scsw) != 0)
 685                 return -EBUSY;
 686         if (cdev->private->state != DEV_STATE_ONLINE)
 687                 return -EINVAL;
 688         /* Are we doing path grouping? */
 689         if (!cdev->private->options.pgroup) {
 690                 /* No, set state offline immediately. */
 691                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
 692                 return 0;
 693         }
 694         /* Start Set Path Group commands. */
 695         cdev->private->state = DEV_STATE_DISBAND_PGID;
 696         ccw_device_disband_start(cdev);
 697         return 0;
 698 }
 699
 700 /*
 701  * Handle timeout in device online/offline process.
 702  */
 703 static void
 704 ccw_device_onoff_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 705 {
 706         int ret;
 707
 708         ret = ccw_device_cancel_halt_clear(cdev);
 709         switch (ret) {
 710         case 0:
 711                 ccw_device_done(cdev, DEV_STATE_BOXED);
 712                 break;
 713         case -ENODEV:
 714                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 715                 break;
 716         default:
 717                 ccw_device_set_timeout(cdev, 3*HZ);
 718         }
 719 }
 720
 721 /*
 722  * Handle not oper event in device recognition.
 723  */
 724 static void
 725 ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event)
 726 {
 727         ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
 728 }
 729
 730 /*
 731  * Handle not operational event in non-special state.
 732  */
 733 static void ccw_device_generic_notoper(struct ccw_device *cdev,
 734                                        enum dev_event dev_event)
 735 {
 736         struct subchannel *sch;
 737
 738         ccw_device_set_notoper(cdev);
 739         sch = to_subchannel(cdev->dev.parent);
 740         css_schedule_eval(sch->schid);
 741 }
 742
 743 /*
 744  * Handle path verification event.
 745  */
 746 static void
 747 ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
 748 {
 749         struct subchannel *sch;
 750
 751         if (cdev->private->state == DEV_STATE_W4SENSE) {
 752                 cdev->private->flags.doverify = 1;
 753                 return;
 754         }
 755         sch = to_subchannel(cdev->dev.parent);
 756         /*
 757          * Since we might not just be coming from an interrupt from the
 758          * subchannel we have to update the schib.
 759          */
 760         if (cio_update_schib(sch)) {
 761                 ccw_device_verify_done(cdev, -ENODEV);
 762                 return;
 763         }
 764
 765         if (scsw_actl(&sch->schib.scsw) != 0 ||
 766             (scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) ||
 767             (scsw_stctl(&cdev->private->irb.scsw) & SCSW_STCTL_STATUS_PEND)) {
 768                 /*
 769                  * No final status yet or final status not yet delivered
 770                  * to the device driver. Can't do path verfication now,
 771                  * delay until final status was delivered.
 772                  */
 773                 cdev->private->flags.doverify = 1;
 774                 return;
 775         }
 776         /* Device is idle, we can do the path verification. */
 777         cdev->private->state = DEV_STATE_VERIFY;
 778         cdev->private->flags.doverify = 0;
 779         ccw_device_verify_start(cdev);
 780 }
 781
 782 /*
 783  * Got an interrupt for a normal io (state online).
 784  */
 785 static void
 786 ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event)
 787 {
 788         struct irb *irb;
 789         int is_cmd;
 790
 791         irb = (struct irb *) __LC_IRB;
 792         is_cmd = !scsw_is_tm(&irb->scsw);
 793         /* Check for unsolicited interrupt. */
 794         if (!scsw_is_solicited(&irb->scsw)) {
 795                 if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
 796                     !irb->esw.esw0.erw.cons) {
 797                         /* Unit check but no sense data. Need basic sense. */
 798                         if (ccw_device_do_sense(cdev, irb) != 0)
 799                                 goto call_handler_unsol;
 800                         memcpy(&cdev->private->irb, irb, sizeof(struct irb));
 801                         cdev->private->state = DEV_STATE_W4SENSE;
 802                         cdev->private->intparm = 0;
 803                         return;
 804                 }
 805 call_handler_unsol:
 806                 if (cdev->handler)
 807                         cdev->handler (cdev, 0, irb);
 808                 if (cdev->private->flags.doverify)
 809                         ccw_device_online_verify(cdev, 0);
 810                 return;
 811         }
 812         /* Accumulate status and find out if a basic sense is needed. */
 813         ccw_device_accumulate_irb(cdev, irb);
 814         if (is_cmd && cdev->private->flags.dosense) {
 815                 if (ccw_device_do_sense(cdev, irb) == 0) {
 816                         cdev->private->state = DEV_STATE_W4SENSE;
 817                 }
 818                 return;
 819         }
 820         /* Call the handler. */
 821         if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
 822                 /* Start delayed path verification. */
 823                 ccw_device_online_verify(cdev, 0);
 824 }
 825
 826 /*
 827  * Got an timeout in online state.
 828  */
 829 static void
 830 ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 831 {
 832         int ret;
 833
 834         ccw_device_set_timeout(cdev, 0);
 835         ret = ccw_device_cancel_halt_clear(cdev);
 836         if (ret == -EBUSY) {
 837                 ccw_device_set_timeout(cdev, 3*HZ);
 838                 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
 839                 return;
 840         }
 841         if (ret == -ENODEV)
 842                 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 843         else if (cdev->handler)
 844                 cdev->handler(cdev, cdev->private->intparm,
 845                               ERR_PTR(-ETIMEDOUT));
 846 }
 847
 848 /*
 849  * Got an interrupt for a basic sense.
 850  */
 851 static void
 852 ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
 853 {
 854         struct irb *irb;
 855
 856         irb = (struct irb *) __LC_IRB;
 857         /* Check for unsolicited interrupt. */
 858         if (scsw_stctl(&irb->scsw) ==
 859             (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
 860                 if (scsw_cc(&irb->scsw) == 1)
 861                         /* Basic sense hasn't started. Try again. */
 862                         ccw_device_do_sense(cdev, irb);
 863                 else {
 864                         CIO_MSG_EVENT(0, "0.%x.%04x: unsolicited "
 865                                       "interrupt during w4sense...\n",
 866                                       cdev->private->dev_id.ssid,
 867                                       cdev->private->dev_id.devno);
 868                         if (cdev->handler)
 869                                 cdev->handler (cdev, 0, irb);
 870                 }
 871                 return;
 872         }
 873         /*
 874          * Check if a halt or clear has been issued in the meanwhile. If yes,
 875          * only deliver the halt/clear interrupt to the device driver as if it
 876          * had killed the original request.
 877          */
 878         if (scsw_fctl(&irb->scsw) &
 879             (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
 880                 /* Retry Basic Sense if requested. */
 881                 if (cdev->private->flags.intretry) {
 882                         cdev->private->flags.intretry = 0;
 883                         ccw_device_do_sense(cdev, irb);
 884                         return;
 885                 }
 886                 cdev->private->flags.dosense = 0;
 887                 memset(&cdev->private->irb, 0, sizeof(struct irb));
 888                 ccw_device_accumulate_irb(cdev, irb);
 889                 goto call_handler;
 890         }
 891         /* Add basic sense info to irb. */
 892         ccw_device_accumulate_basic_sense(cdev, irb);
 893         if (cdev->private->flags.dosense) {
 894                 /* Another basic sense is needed. */
 895                 ccw_device_do_sense(cdev, irb);
 896                 return;
 897         }
 898 call_handler:
 899         cdev->private->state = DEV_STATE_ONLINE;
 900         /* Call the handler. */
 901         if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
 902                 /* Start delayed path verification. */
 903                 ccw_device_online_verify(cdev, 0);
 904 }
 905
 906 static void
 907 ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event)
 908 {
 909         struct irb *irb;
 910
 911         irb = (struct irb *) __LC_IRB;
 912         /* Accumulate status. We don't do basic sense. */
 913         ccw_device_accumulate_irb(cdev, irb);
 914         /* Remember to clear irb to avoid residuals. */
 915         memset(&cdev->private->irb, 0, sizeof(struct irb));
 916         /* Try to start delayed device verification. */
 917         ccw_device_online_verify(cdev, 0);
 918         /* Note: Don't call handler for cio initiated clear! */
 919 }
 920
 921 static void
 922 ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
 923 {
 924         struct subchannel *sch;
 925
 926         sch = to_subchannel(cdev->dev.parent);
 927         ccw_device_set_timeout(cdev, 0);
 928         /* Start delayed path verification. */
 929         ccw_device_online_verify(cdev, 0);
 930         /* OK, i/o is dead now. Call interrupt handler. */
 931         if (cdev->handler)
 932                 cdev->handler(cdev, cdev->private->intparm,
 933                               ERR_PTR(-EIO));
 934 }
 935
 936 static void
 937 ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 938 {
 939         int ret;
 940
 941         ret = ccw_device_cancel_halt_clear(cdev);
 942         if (ret == -EBUSY) {
 943                 ccw_device_set_timeout(cdev, 3*HZ);
 944                 return;
 945         }
 946         /* Start delayed path verification. */
 947         ccw_device_online_verify(cdev, 0);
 948         if (cdev->handler)
 949                 cdev->handler(cdev, cdev->private->intparm,
 950                               ERR_PTR(-EIO));
 951 }
 952
 953 void ccw_device_kill_io(struct ccw_device *cdev)
 954 {
 955         int ret;
 956
 957         ret = ccw_device_cancel_halt_clear(cdev);
 958         if (ret == -EBUSY) {
 959                 ccw_device_set_timeout(cdev, 3*HZ);
 960                 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
 961                 return;
 962         }
 963         /* Start delayed path verification. */
 964         ccw_device_online_verify(cdev, 0);
 965         if (cdev->handler)
 966                 cdev->handler(cdev, cdev->private->intparm,
 967                               ERR_PTR(-EIO));
 968 }
 969
 970 static void
 971 ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event)
 972 {
 973         /* Start verification after current task finished. */
 974         cdev->private->flags.doverify = 1;
 975 }
 976
 977 static void
 978 ccw_device_stlck_done(struct ccw_device *cdev, enum dev_event dev_event)
 979 {
 980         struct irb *irb;
 981
 982         switch (dev_event) {
 983         case DEV_EVENT_INTERRUPT:
 984                 irb = (struct irb *) __LC_IRB;
 985                 /* Check for unsolicited interrupt. */
 986                 if ((scsw_stctl(&irb->scsw) ==
 987                      (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) &&
 988                     (!scsw_cc(&irb->scsw)))
 989                         /* FIXME: we should restart stlck here, but this
 990                          * is extremely unlikely ... */
 991                         goto out_wakeup;
 992
 993                 ccw_device_accumulate_irb(cdev, irb);
 994                 /* We don't care about basic sense etc. */
 995                 break;
 996         default: /* timeout */
 997                 break;
 998         }
 999 out_wakeup:
1000         wake_up(&cdev->private->wait_q);
1001 }
1002
1003 static void
1004 ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
1005 {
1006         struct subchannel *sch;
1007
1008         sch = to_subchannel(cdev->dev.parent);
1009         if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0)
1010                 /* Couldn't enable the subchannel for i/o. Sick device. */
1011                 return;
1012
1013         /* After 60s the device recognition is considered to have failed. */
1014         ccw_device_set_timeout(cdev, 60*HZ);
1015
1016         cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
1017         ccw_device_sense_id_start(cdev);
1018 }
1019
1020 void ccw_device_trigger_reprobe(struct ccw_device *cdev)
1021 {
1022         struct subchannel *sch;
1023
1024         if (cdev->private->state != DEV_STATE_DISCONNECTED)
1025                 return;
1026
1027         sch = to_subchannel(cdev->dev.parent);
1028         /* Update some values. */
1029         if (cio_update_schib(sch))
1030                 return;
1031         /*
1032          * The pim, pam, pom values may not be accurate, but they are the best
1033          * we have before performing device selection :/
1034          */
1035         sch->lpm = sch->schib.pmcw.pam & sch->opm;
1036         /*
1037          * Use the initial configuration since we can't be shure that the old
1038          * paths are valid.
1039          */
1040         io_subchannel_init_config(sch);
1041         if (cio_commit_config(sch))
1042                 return;
1043
1044         /* We should also udate ssd info, but this has to wait. */
1045         /* Check if this is another device which appeared on the same sch. */
1046         if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {
1047                 PREPARE_WORK(&cdev->private->kick_work,
1048                              ccw_device_move_to_orphanage);
1049                 queue_work(slow_path_wq, &cdev->private->kick_work);
1050         } else
1051                 ccw_device_start_id(cdev, 0);
1052 }
1053
1054 static void
1055 ccw_device_offline_irq(struct ccw_device *cdev, enum dev_event dev_event)
1056 {
1057         struct subchannel *sch;
1058
1059         sch = to_subchannel(cdev->dev.parent);
1060         /*
1061          * An interrupt in state offline means a previous disable was not
1062          * successful - should not happen, but we try to disable again.
1063          */
1064         cio_disable_subchannel(sch);
1065 }
1066
1067 static void
1068 ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event)
1069 {
1070         retry_set_schib(cdev);
1071         cdev->private->state = DEV_STATE_ONLINE;
1072         dev_fsm_event(cdev, dev_event);
1073 }
1074
1075 static void ccw_device_update_cmfblock(struct ccw_device *cdev,
1076                                        enum dev_event dev_event)
1077 {
1078         cmf_retry_copy_block(cdev);
1079         cdev->private->state = DEV_STATE_ONLINE;
1080         dev_fsm_event(cdev, dev_event);
1081 }
1082
1083 static void
1084 ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
1085 {
1086         ccw_device_set_timeout(cdev, 0);
1087         if (dev_event == DEV_EVENT_NOTOPER)
1088                 cdev->private->state = DEV_STATE_NOT_OPER;
1089         else
1090                 cdev->private->state = DEV_STATE_OFFLINE;
1091         wake_up(&cdev->private->wait_q);
1092 }
1093
1094 static void
1095 ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event)
1096 {
1097         int ret;
1098
1099         ret = ccw_device_cancel_halt_clear(cdev);
1100         switch (ret) {
1101         case 0:
1102                 cdev->private->state = DEV_STATE_OFFLINE;
1103                 wake_up(&cdev->private->wait_q);
1104                 break;
1105         case -ENODEV:
1106                 cdev->private->state = DEV_STATE_NOT_OPER;
1107                 wake_up(&cdev->private->wait_q);
1108                 break;
1109         default:
1110                 ccw_device_set_timeout(cdev, HZ/10);
1111         }
1112 }
1113
1114 /*
1115  * No operation action. This is used e.g. to ignore a timeout event in
1116  * state offline.
1117  */
1118 static void
1119 ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
1120 {
1121 }
1122
1123 /*
1124  * Bug operation action.
1125  */
1126 static void
1127 ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event)
1128 {
1129         CIO_MSG_EVENT(0, "Internal state [%i][%i] not handled for device "
1130                       "0.%x.%04x\n", cdev->private->state, dev_event,
1131                       cdev->private->dev_id.ssid,
1132                       cdev->private->dev_id.devno);
1133         BUG();
1134 }
1135
1136 /*
1137  * device statemachine
1138  */
1139 fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1140         [DEV_STATE_NOT_OPER] = {
1141                 [DEV_EVENT_NOTOPER]     = ccw_device_nop,
1142                 [DEV_EVENT_INTERRUPT]   = ccw_device_bug,
1143                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1144                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1145         },
1146         [DEV_STATE_SENSE_PGID] = {
1147                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1148                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_pgid_irq,
1149                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1150                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1151         },
1152         [DEV_STATE_SENSE_ID] = {
1153                 [DEV_EVENT_NOTOPER]     = ccw_device_recog_notoper,
1154                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_id_irq,
1155                 [DEV_EVENT_TIMEOUT]     = ccw_device_recog_timeout,
1156                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1157         },
1158         [DEV_STATE_OFFLINE] = {
1159                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1160                 [DEV_EVENT_INTERRUPT]   = ccw_device_offline_irq,
1161                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1162                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1163         },
1164         [DEV_STATE_VERIFY] = {
1165                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1166                 [DEV_EVENT_INTERRUPT]   = ccw_device_verify_irq,
1167                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1168                 [DEV_EVENT_VERIFY]      = ccw_device_delay_verify,
1169         },
1170         [DEV_STATE_ONLINE] = {
1171                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1172                 [DEV_EVENT_INTERRUPT]   = ccw_device_irq,
1173                 [DEV_EVENT_TIMEOUT]     = ccw_device_online_timeout,
1174                 [DEV_EVENT_VERIFY]      = ccw_device_online_verify,
1175         },
1176         [DEV_STATE_W4SENSE] = {
1177                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1178                 [DEV_EVENT_INTERRUPT]   = ccw_device_w4sense,
1179                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1180                 [DEV_EVENT_VERIFY]      = ccw_device_online_verify,
1181         },
1182         [DEV_STATE_DISBAND_PGID] = {
1183                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1184                 [DEV_EVENT_INTERRUPT]   = ccw_device_disband_irq,
1185                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1186                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1187         },
1188         [DEV_STATE_BOXED] = {
1189                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1190                 [DEV_EVENT_INTERRUPT]   = ccw_device_stlck_done,
1191                 [DEV_EVENT_TIMEOUT]     = ccw_device_stlck_done,
1192                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1193         },
1194         /* states to wait for i/o completion before doing something */
1195         [DEV_STATE_CLEAR_VERIFY] = {
1196                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1197                 [DEV_EVENT_INTERRUPT]   = ccw_device_clear_verify,
1198                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1199                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1200         },
1201         [DEV_STATE_TIMEOUT_KILL] = {
1202                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1203                 [DEV_EVENT_INTERRUPT]   = ccw_device_killing_irq,
1204                 [DEV_EVENT_TIMEOUT]     = ccw_device_killing_timeout,
1205                 [DEV_EVENT_VERIFY]      = ccw_device_nop, //FIXME
1206         },
1207         [DEV_STATE_QUIESCE] = {
1208                 [DEV_EVENT_NOTOPER]     = ccw_device_quiesce_done,
1209                 [DEV_EVENT_INTERRUPT]   = ccw_device_quiesce_done,
1210                 [DEV_EVENT_TIMEOUT]     = ccw_device_quiesce_timeout,
1211                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1212         },
1213         /* special states for devices gone not operational */
1214         [DEV_STATE_DISCONNECTED] = {
1215                 [DEV_EVENT_NOTOPER]     = ccw_device_nop,
1216                 [DEV_EVENT_INTERRUPT]   = ccw_device_start_id,
1217                 [DEV_EVENT_TIMEOUT]     = ccw_device_bug,
1218                 [DEV_EVENT_VERIFY]      = ccw_device_start_id,
1219         },
1220         [DEV_STATE_DISCONNECTED_SENSE_ID] = {
1221                 [DEV_EVENT_NOTOPER]     = ccw_device_recog_notoper,
1222                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_id_irq,
1223                 [DEV_EVENT_TIMEOUT]     = ccw_device_recog_timeout,
1224                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1225         },
1226         [DEV_STATE_CMFCHANGE] = {
1227                 [DEV_EVENT_NOTOPER]     = ccw_device_change_cmfstate,
1228                 [DEV_EVENT_INTERRUPT]   = ccw_device_change_cmfstate,
1229                 [DEV_EVENT_TIMEOUT]     = ccw_device_change_cmfstate,
1230                 [DEV_EVENT_VERIFY]      = ccw_device_change_cmfstate,
1231         },
1232         [DEV_STATE_CMFUPDATE] = {
1233                 [DEV_EVENT_NOTOPER]     = ccw_device_update_cmfblock,
1234                 [DEV_EVENT_INTERRUPT]   = ccw_device_update_cmfblock,
1235                 [DEV_EVENT_TIMEOUT]     = ccw_device_update_cmfblock,
1236                 [DEV_EVENT_VERIFY]      = ccw_device_update_cmfblock,
1237         },
1238 };
1239
1240 EXPORT_SYMBOL_GPL(ccw_device_set_timeout);