drivers/s390/cio/device_fsm.c

   1 /*
   2  * drivers/s390/cio/device_fsm.c
   3  * finite state machine for device handling
   4  *
   5  *    Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
   6  *                       IBM Corporation
   7  *    Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)
   8  *               Martin Schwidefsky (schwidefsky@de.ibm.com)
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/init.h>
  13 #include <linux/jiffies.h>
  14 #include <linux/string.h>
  15
  16 #include <asm/ccwdev.h>
  17 #include <asm/cio.h>
  18 #include <asm/chpid.h>
  19
  20 #include "cio.h"
  21 #include "cio_debug.h"
  22 #include "css.h"
  23 #include "device.h"
  24 #include "chsc.h"
  25 #include "ioasm.h"
  26 #include "chp.h"
  27
  28 static int timeout_log_enabled;
  29
  30 int
  31 device_is_online(struct subchannel *sch)
  32 {
  33         struct ccw_device *cdev;
  34
  35         cdev = sch_get_cdev(sch);
  36         if (!cdev)
  37                 return 0;
  38         return (cdev->private->state == DEV_STATE_ONLINE);
  39 }
  40
  41 int
  42 device_is_disconnected(struct subchannel *sch)
  43 {
  44         struct ccw_device *cdev;
  45
  46         cdev = sch_get_cdev(sch);
  47         if (!cdev)
  48                 return 0;
  49         return (cdev->private->state == DEV_STATE_DISCONNECTED ||
  50                 cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID);
  51 }
  52
  53 void
  54 device_set_disconnected(struct subchannel *sch)
  55 {
  56         struct ccw_device *cdev;
  57
  58         cdev = sch_get_cdev(sch);
  59         if (!cdev)
  60                 return;
  61         ccw_device_set_timeout(cdev, 0);
  62         cdev->private->flags.fake_irb = 0;
  63         cdev->private->state = DEV_STATE_DISCONNECTED;
  64 }
  65
  66 void device_set_intretry(struct subchannel *sch)
  67 {
  68         struct ccw_device *cdev;
  69
  70         cdev = sch_get_cdev(sch);
  71         if (!cdev)
  72                 return;
  73         cdev->private->flags.intretry = 1;
  74 }
  75
  76 int device_trigger_verify(struct subchannel *sch)
  77 {
  78         struct ccw_device *cdev;
  79
  80         cdev = sch_get_cdev(sch);
  81         if (!cdev || !cdev->online)
  82                 return -EINVAL;
  83         dev_fsm_event(cdev, DEV_EVENT_VERIFY);
  84         return 0;
  85 }
  86
  87 static int __init ccw_timeout_log_setup(char *unused)
  88 {
  89         timeout_log_enabled = 1;
  90         return 1;
  91 }
  92
  93 __setup("ccw_timeout_log", ccw_timeout_log_setup);
  94
  95 static void ccw_timeout_log(struct ccw_device *cdev)
  96 {
  97         struct schib schib;
  98         struct subchannel *sch;
  99         struct io_subchannel_private *private;
 100         int cc;
 101
 102         sch = to_subchannel(cdev->dev.parent);
 103         private = to_io_private(sch);
 104         cc = stsch(sch->schid, &schib);
 105
 106         printk(KERN_WARNING "cio: ccw device timeout occurred at %llx, "
 107                "device information:\n", get_clock());
 108         printk(KERN_WARNING "cio: orb:\n");
 109         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
 110                        &private->orb, sizeof(private->orb), 0);
 111         printk(KERN_WARNING "cio: ccw device bus id: %s\n", cdev->dev.bus_id);
 112         printk(KERN_WARNING "cio: subchannel bus id: %s\n", sch->dev.bus_id);
 113         printk(KERN_WARNING "cio: subchannel lpm: %02x, opm: %02x, "
 114                "vpm: %02x\n", sch->lpm, sch->opm, sch->vpm);
 115
 116         if ((void *)(addr_t)private->orb.cpa == &private->sense_ccw ||
 117             (void *)(addr_t)private->orb.cpa == cdev->private->iccws)
 118                 printk(KERN_WARNING "cio: last channel program (intern):\n");
 119         else
 120                 printk(KERN_WARNING "cio: last channel program:\n");
 121
 122         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
 123                        (void *)(addr_t)private->orb.cpa,
 124                        sizeof(struct ccw1), 0);
 125         printk(KERN_WARNING "cio: ccw device state: %d\n",
 126                cdev->private->state);
 127         printk(KERN_WARNING "cio: store subchannel returned: cc=%d\n", cc);
 128         printk(KERN_WARNING "cio: schib:\n");
 129         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
 130                        &schib, sizeof(schib), 0);
 131         printk(KERN_WARNING "cio: ccw device flags:\n");
 132         print_hex_dump(KERN_WARNING, "cio:  ", DUMP_PREFIX_NONE, 16, 1,
 133                        &cdev->private->flags, sizeof(cdev->private->flags), 0);
 134 }
 135
 136 /*
 137  * Timeout function. It just triggers a DEV_EVENT_TIMEOUT.
 138  */
 139 static void
 140 ccw_device_timeout(unsigned long data)
 141 {
 142         struct ccw_device *cdev;
 143
 144         cdev = (struct ccw_device *) data;
 145         spin_lock_irq(cdev->ccwlock);
 146         if (timeout_log_enabled)
 147                 ccw_timeout_log(cdev);
 148         dev_fsm_event(cdev, DEV_EVENT_TIMEOUT);
 149         spin_unlock_irq(cdev->ccwlock);
 150 }
 151
 152 /*
 153  * Set timeout
 154  */
 155 void
 156 ccw_device_set_timeout(struct ccw_device *cdev, int expires)
 157 {
 158         if (expires == 0) {
 159                 del_timer(&cdev->private->timer);
 160                 return;
 161         }
 162         if (timer_pending(&cdev->private->timer)) {
 163                 if (mod_timer(&cdev->private->timer, jiffies + expires))
 164                         return;
 165         }
 166         cdev->private->timer.function = ccw_device_timeout;
 167         cdev->private->timer.data = (unsigned long) cdev;
 168         cdev->private->timer.expires = jiffies + expires;
 169         add_timer(&cdev->private->timer);
 170 }
 171
 172 /* Kill any pending timers after machine check. */
 173 void
 174 device_kill_pending_timer(struct subchannel *sch)
 175 {
 176         struct ccw_device *cdev;
 177
 178         cdev = sch_get_cdev(sch);
 179         if (!cdev)
 180                 return;
 181         ccw_device_set_timeout(cdev, 0);
 182 }
 183
 184 /*
 185  * Cancel running i/o. This is called repeatedly since halt/clear are
 186  * asynchronous operations. We do one try with cio_cancel, two tries
 187  * with cio_halt, 255 tries with cio_clear. If everythings fails panic.
 188  * Returns 0 if device now idle, -ENODEV for device not operational and
 189  * -EBUSY if an interrupt is expected (either from halt/clear or from a
 190  * status pending).
 191  */
 192 int
 193 ccw_device_cancel_halt_clear(struct ccw_device *cdev)
 194 {
 195         struct subchannel *sch;
 196         int ret;
 197
 198         sch = to_subchannel(cdev->dev.parent);
 199         ret = stsch(sch->schid, &sch->schib);
 200         if (ret || !sch->schib.pmcw.dnv)
 201                 return -ENODEV;
 202         if (!sch->schib.pmcw.ena)
 203                 /* Not operational -> done. */
 204                 return 0;
 205         /* Stage 1: cancel io. */
 206         if (!(sch->schib.scsw.actl & SCSW_ACTL_HALT_PEND) &&
 207             !(sch->schib.scsw.actl & SCSW_ACTL_CLEAR_PEND)) {
 208                 ret = cio_cancel(sch);
 209                 if (ret != -EINVAL)
 210                         return ret;
 211                 /* cancel io unsuccessful. From now on it is asynchronous. */
 212                 cdev->private->iretry = 3;      /* 3 halt retries. */
 213         }
 214         if (!(sch->schib.scsw.actl & SCSW_ACTL_CLEAR_PEND)) {
 215                 /* Stage 2: halt io. */
 216                 if (cdev->private->iretry) {
 217                         cdev->private->iretry--;
 218                         ret = cio_halt(sch);
 219                         if (ret != -EBUSY)
 220                                 return (ret == 0) ? -EBUSY : ret;
 221                 }
 222                 /* halt io unsuccessful. */
 223                 cdev->private->iretry = 255;    /* 255 clear retries. */
 224         }
 225         /* Stage 3: clear io. */
 226         if (cdev->private->iretry) {
 227                 cdev->private->iretry--;
 228                 ret = cio_clear (sch);
 229                 return (ret == 0) ? -EBUSY : ret;
 230         }
 231         panic("Can't stop i/o on subchannel.\n");
 232 }
 233
 234 static int
 235 ccw_device_handle_oper(struct ccw_device *cdev)
 236 {
 237         struct subchannel *sch;
 238
 239         sch = to_subchannel(cdev->dev.parent);
 240         cdev->private->flags.recog_done = 1;
 241         /*
 242          * Check if cu type and device type still match. If
 243          * not, it is certainly another device and we have to
 244          * de- and re-register.
 245          */
 246         if (cdev->id.cu_type != cdev->private->senseid.cu_type ||
 247             cdev->id.cu_model != cdev->private->senseid.cu_model ||
 248             cdev->id.dev_type != cdev->private->senseid.dev_type ||
 249             cdev->id.dev_model != cdev->private->senseid.dev_model) {
 250                 PREPARE_WORK(&cdev->private->kick_work,
 251                              ccw_device_do_unreg_rereg);
 252                 queue_work(ccw_device_work, &cdev->private->kick_work);
 253                 return 0;
 254         }
 255         cdev->private->flags.donotify = 1;
 256         return 1;
 257 }
 258
 259 /*
 260  * The machine won't give us any notification by machine check if a chpid has
 261  * been varied online on the SE so we have to find out by magic (i. e. driving
 262  * the channel subsystem to device selection and updating our path masks).
 263  */
 264 static void
 265 __recover_lost_chpids(struct subchannel *sch, int old_lpm)
 266 {
 267         int mask, i;
 268         struct chp_id chpid;
 269
 270         chp_id_init(&chpid);
 271         for (i = 0; i<8; i++) {
 272                 mask = 0x80 >> i;
 273                 if (!(sch->lpm & mask))
 274                         continue;
 275                 if (old_lpm & mask)
 276                         continue;
 277                 chpid.id = sch->schib.pmcw.chpid[i];
 278                 if (!chp_is_registered(chpid))
 279                         css_schedule_eval_all();
 280         }
 281 }
 282
 283 /*
 284  * Stop device recognition.
 285  */
 286 static void
 287 ccw_device_recog_done(struct ccw_device *cdev, int state)
 288 {
 289         struct subchannel *sch;
 290         int notify, old_lpm, same_dev;
 291
 292         sch = to_subchannel(cdev->dev.parent);
 293
 294         ccw_device_set_timeout(cdev, 0);
 295         cio_disable_subchannel(sch);
 296         /*
 297          * Now that we tried recognition, we have performed device selection
 298          * through ssch() and the path information is up to date.
 299          */
 300         old_lpm = sch->lpm;
 301         stsch(sch->schid, &sch->schib);
 302         sch->lpm = sch->schib.pmcw.pam & sch->opm;
 303         /* Check since device may again have become not operational. */
 304         if (!sch->schib.pmcw.dnv)
 305                 state = DEV_STATE_NOT_OPER;
 306         if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID)
 307                 /* Force reprobe on all chpids. */
 308                 old_lpm = 0;
 309         if (sch->lpm != old_lpm)
 310                 __recover_lost_chpids(sch, old_lpm);
 311         if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) {
 312                 if (state == DEV_STATE_NOT_OPER) {
 313                         cdev->private->flags.recog_done = 1;
 314                         cdev->private->state = DEV_STATE_DISCONNECTED;
 315                         return;
 316                 }
 317                 /* Boxed devices don't need extra treatment. */
 318         }
 319         notify = 0;
 320         same_dev = 0; /* Keep the compiler quiet... */
 321         switch (state) {
 322         case DEV_STATE_NOT_OPER:
 323                 CIO_DEBUG(KERN_WARNING, 2,
 324                           "SenseID : unknown device %04x on subchannel "
 325                           "0.%x.%04x\n", cdev->private->dev_id.devno,
 326                           sch->schid.ssid, sch->schid.sch_no);
 327                 break;
 328         case DEV_STATE_OFFLINE:
 329                 if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) {
 330                         same_dev = ccw_device_handle_oper(cdev);
 331                         notify = 1;
 332                 }
 333                 /* fill out sense information */
 334                 memset(&cdev->id, 0, sizeof(cdev->id));
 335                 cdev->id.cu_type   = cdev->private->senseid.cu_type;
 336                 cdev->id.cu_model  = cdev->private->senseid.cu_model;
 337                 cdev->id.dev_type  = cdev->private->senseid.dev_type;
 338                 cdev->id.dev_model = cdev->private->senseid.dev_model;
 339                 if (notify) {
 340                         cdev->private->state = DEV_STATE_OFFLINE;
 341                         if (same_dev) {
 342                                 /* Get device online again. */
 343                                 ccw_device_online(cdev);
 344                                 wake_up(&cdev->private->wait_q);
 345                         }
 346                         return;
 347                 }
 348                 /* Issue device info message. */
 349                 CIO_DEBUG(KERN_INFO, 2,
 350                           "SenseID : device 0.%x.%04x reports: "
 351                           "CU  Type/Mod = %04X/%02X, Dev Type/Mod = "
 352                           "%04X/%02X\n",
 353                           cdev->private->dev_id.ssid,
 354                           cdev->private->dev_id.devno,
 355                           cdev->id.cu_type, cdev->id.cu_model,
 356                           cdev->id.dev_type, cdev->id.dev_model);
 357                 break;
 358         case DEV_STATE_BOXED:
 359                 CIO_DEBUG(KERN_WARNING, 2,
 360                           "SenseID : boxed device %04x on subchannel "
 361                           "0.%x.%04x\n", cdev->private->dev_id.devno,
 362                           sch->schid.ssid, sch->schid.sch_no);
 363                 break;
 364         }
 365         cdev->private->state = state;
 366         io_subchannel_recog_done(cdev);
 367         if (state != DEV_STATE_NOT_OPER)
 368                 wake_up(&cdev->private->wait_q);
 369 }
 370
 371 /*
 372  * Function called from device_id.c after sense id has completed.
 373  */
 374 void
 375 ccw_device_sense_id_done(struct ccw_device *cdev, int err)
 376 {
 377         switch (err) {
 378         case 0:
 379                 ccw_device_recog_done(cdev, DEV_STATE_OFFLINE);
 380                 break;
 381         case -ETIME:            /* Sense id stopped by timeout. */
 382                 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
 383                 break;
 384         default:
 385                 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
 386                 break;
 387         }
 388 }
 389
 390 static void
 391 ccw_device_oper_notify(struct work_struct *work)
 392 {
 393         struct ccw_device_private *priv;
 394         struct ccw_device *cdev;
 395         struct subchannel *sch;
 396         int ret;
 397         unsigned long flags;
 398
 399         priv = container_of(work, struct ccw_device_private, kick_work);
 400         cdev = priv->cdev;
 401         spin_lock_irqsave(cdev->ccwlock, flags);
 402         sch = to_subchannel(cdev->dev.parent);
 403         if (sch->driver && sch->driver->notify) {
 404                 spin_unlock_irqrestore(cdev->ccwlock, flags);
 405                 ret = sch->driver->notify(sch, CIO_OPER);
 406                 spin_lock_irqsave(cdev->ccwlock, flags);
 407         } else
 408                 ret = 0;
 409         if (ret) {
 410                 /* Reenable channel measurements, if needed. */
 411                 spin_unlock_irqrestore(cdev->ccwlock, flags);
 412                 cmf_reenable(cdev);
 413                 spin_lock_irqsave(cdev->ccwlock, flags);
 414                 wake_up(&cdev->private->wait_q);
 415         }
 416         spin_unlock_irqrestore(cdev->ccwlock, flags);
 417         if (!ret)
 418                 /* Driver doesn't want device back. */
 419                 ccw_device_do_unreg_rereg(work);
 420 }
 421
 422 /*
 423  * Finished with online/offline processing.
 424  */
 425 static void
 426 ccw_device_done(struct ccw_device *cdev, int state)
 427 {
 428         struct subchannel *sch;
 429
 430         sch = to_subchannel(cdev->dev.parent);
 431
 432         ccw_device_set_timeout(cdev, 0);
 433
 434         if (state != DEV_STATE_ONLINE)
 435                 cio_disable_subchannel(sch);
 436
 437         /* Reset device status. */
 438         memset(&cdev->private->irb, 0, sizeof(struct irb));
 439
 440         cdev->private->state = state;
 441
 442
 443         if (state == DEV_STATE_BOXED)
 444                 CIO_DEBUG(KERN_WARNING, 2,
 445                           "Boxed device %04x on subchannel %04x\n",
 446                           cdev->private->dev_id.devno, sch->schid.sch_no);
 447
 448         if (cdev->private->flags.donotify) {
 449                 cdev->private->flags.donotify = 0;
 450                 PREPARE_WORK(&cdev->private->kick_work, ccw_device_oper_notify);
 451                 queue_work(ccw_device_notify_work, &cdev->private->kick_work);
 452         }
 453         wake_up(&cdev->private->wait_q);
 454
 455         if (css_init_done && state != DEV_STATE_ONLINE)
 456                 put_device (&cdev->dev);
 457 }
 458
 459 static int cmp_pgid(struct pgid *p1, struct pgid *p2)
 460 {
 461         char *c1;
 462         char *c2;
 463
 464         c1 = (char *)p1;
 465         c2 = (char *)p2;
 466
 467         return memcmp(c1 + 1, c2 + 1, sizeof(struct pgid) - 1);
 468 }
 469
 470 static void __ccw_device_get_common_pgid(struct ccw_device *cdev)
 471 {
 472         int i;
 473         int last;
 474
 475         last = 0;
 476         for (i = 0; i < 8; i++) {
 477                 if (cdev->private->pgid[i].inf.ps.state1 == SNID_STATE1_RESET)
 478                         /* No PGID yet */
 479                         continue;
 480                 if (cdev->private->pgid[last].inf.ps.state1 ==
 481                     SNID_STATE1_RESET) {
 482                         /* First non-zero PGID */
 483                         last = i;
 484                         continue;
 485                 }
 486                 if (cmp_pgid(&cdev->private->pgid[i],
 487                              &cdev->private->pgid[last]) == 0)
 488                         /* Non-conflicting PGIDs */
 489                         continue;
 490
 491                 /* PGID mismatch, can't pathgroup. */
 492                 CIO_MSG_EVENT(0, "SNID - pgid mismatch for device "
 493                               "0.%x.%04x, can't pathgroup\n",
 494                               cdev->private->dev_id.ssid,
 495                               cdev->private->dev_id.devno);
 496                 cdev->private->options.pgroup = 0;
 497                 return;
 498         }
 499         if (cdev->private->pgid[last].inf.ps.state1 ==
 500             SNID_STATE1_RESET)
 501                 /* No previous pgid found */
 502                 memcpy(&cdev->private->pgid[0],
 503                        &channel_subsystems[0]->global_pgid,
 504                        sizeof(struct pgid));
 505         else
 506                 /* Use existing pgid */
 507                 memcpy(&cdev->private->pgid[0], &cdev->private->pgid[last],
 508                        sizeof(struct pgid));
 509 }
 510
 511 /*
 512  * Function called from device_pgid.c after sense path ground has completed.
 513  */
 514 void
 515 ccw_device_sense_pgid_done(struct ccw_device *cdev, int err)
 516 {
 517         struct subchannel *sch;
 518
 519         sch = to_subchannel(cdev->dev.parent);
 520         switch (err) {
 521         case -EOPNOTSUPP: /* path grouping not supported, use nop instead. */
 522                 cdev->private->options.pgroup = 0;
 523                 break;
 524         case 0: /* success */
 525         case -EACCES: /* partial success, some paths not operational */
 526                 /* Check if all pgids are equal or 0. */
 527                 __ccw_device_get_common_pgid(cdev);
 528                 break;
 529         case -ETIME:            /* Sense path group id stopped by timeout. */
 530         case -EUSERS:           /* device is reserved for someone else. */
 531                 ccw_device_done(cdev, DEV_STATE_BOXED);
 532                 return;
 533         default:
 534                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 535                 return;
 536         }
 537         /* Start Path Group verification. */
 538         cdev->private->state = DEV_STATE_VERIFY;
 539         cdev->private->flags.doverify = 0;
 540         ccw_device_verify_start(cdev);
 541 }
 542
 543 /*
 544  * Start device recognition.
 545  */
 546 int
 547 ccw_device_recognition(struct ccw_device *cdev)
 548 {
 549         struct subchannel *sch;
 550         int ret;
 551
 552         if ((cdev->private->state != DEV_STATE_NOT_OPER) &&
 553             (cdev->private->state != DEV_STATE_BOXED))
 554                 return -EINVAL;
 555         sch = to_subchannel(cdev->dev.parent);
 556         ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc,
 557                                     (u32)(addr_t)sch);
 558         if (ret != 0)
 559                 /* Couldn't enable the subchannel for i/o. Sick device. */
 560                 return ret;
 561
 562         /* After 60s the device recognition is considered to have failed. */
 563         ccw_device_set_timeout(cdev, 60*HZ);
 564
 565         /*
 566          * We used to start here with a sense pgid to find out whether a device
 567          * is locked by someone else. Unfortunately, the sense pgid command
 568          * code has other meanings on devices predating the path grouping
 569          * algorithm, so we start with sense id and box the device after an
 570          * timeout (or if sense pgid during path verification detects the device
 571          * is locked, as may happen on newer devices).
 572          */
 573         cdev->private->flags.recog_done = 0;
 574         cdev->private->state = DEV_STATE_SENSE_ID;
 575         ccw_device_sense_id_start(cdev);
 576         return 0;
 577 }
 578
 579 /*
 580  * Handle timeout in device recognition.
 581  */
 582 static void
 583 ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 584 {
 585         int ret;
 586
 587         ret = ccw_device_cancel_halt_clear(cdev);
 588         switch (ret) {
 589         case 0:
 590                 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
 591                 break;
 592         case -ENODEV:
 593                 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
 594                 break;
 595         default:
 596                 ccw_device_set_timeout(cdev, 3*HZ);
 597         }
 598 }
 599
 600
 601 void
 602 ccw_device_verify_done(struct ccw_device *cdev, int err)
 603 {
 604         struct subchannel *sch;
 605
 606         sch = to_subchannel(cdev->dev.parent);
 607         /* Update schib - pom may have changed. */
 608         stsch(sch->schid, &sch->schib);
 609         /* Update lpm with verified path mask. */
 610         sch->lpm = sch->vpm;
 611         /* Repeat path verification? */
 612         if (cdev->private->flags.doverify) {
 613                 cdev->private->flags.doverify = 0;
 614                 ccw_device_verify_start(cdev);
 615                 return;
 616         }
 617         switch (err) {
 618         case -EOPNOTSUPP: /* path grouping not supported, just set online. */
 619                 cdev->private->options.pgroup = 0;
 620         case 0:
 621                 ccw_device_done(cdev, DEV_STATE_ONLINE);
 622                 /* Deliver fake irb to device driver, if needed. */
 623                 if (cdev->private->flags.fake_irb) {
 624                         memset(&cdev->private->irb, 0, sizeof(struct irb));
 625                         cdev->private->irb.scsw.cc = 1;
 626                         cdev->private->irb.scsw.fctl = SCSW_FCTL_START_FUNC;
 627                         cdev->private->irb.scsw.actl = SCSW_ACTL_START_PEND;
 628                         cdev->private->irb.scsw.stctl = SCSW_STCTL_STATUS_PEND;
 629                         cdev->private->flags.fake_irb = 0;
 630                         if (cdev->handler)
 631                                 cdev->handler(cdev, cdev->private->intparm,
 632                                               &cdev->private->irb);
 633                         memset(&cdev->private->irb, 0, sizeof(struct irb));
 634                 }
 635                 break;
 636         case -ETIME:
 637                 /* Reset oper notify indication after verify error. */
 638                 cdev->private->flags.donotify = 0;
 639                 ccw_device_done(cdev, DEV_STATE_BOXED);
 640                 break;
 641         default:
 642                 /* Reset oper notify indication after verify error. */
 643                 cdev->private->flags.donotify = 0;
 644                 if (cdev->online)
 645                         dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 646                 else
 647                         ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 648                 break;
 649         }
 650 }
 651
 652 /*
 653  * Get device online.
 654  */
 655 int
 656 ccw_device_online(struct ccw_device *cdev)
 657 {
 658         struct subchannel *sch;
 659         int ret;
 660
 661         if ((cdev->private->state != DEV_STATE_OFFLINE) &&
 662             (cdev->private->state != DEV_STATE_BOXED))
 663                 return -EINVAL;
 664         sch = to_subchannel(cdev->dev.parent);
 665         if (css_init_done && !get_device(&cdev->dev))
 666                 return -ENODEV;
 667         ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc,
 668                                     (u32)(addr_t)sch);
 669         if (ret != 0) {
 670                 /* Couldn't enable the subchannel for i/o. Sick device. */
 671                 if (ret == -ENODEV)
 672                         dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 673                 return ret;
 674         }
 675         /* Do we want to do path grouping? */
 676         if (!cdev->private->options.pgroup) {
 677                 /* Start initial path verification. */
 678                 cdev->private->state = DEV_STATE_VERIFY;
 679                 cdev->private->flags.doverify = 0;
 680                 ccw_device_verify_start(cdev);
 681                 return 0;
 682         }
 683         /* Do a SensePGID first. */
 684         cdev->private->state = DEV_STATE_SENSE_PGID;
 685         ccw_device_sense_pgid_start(cdev);
 686         return 0;
 687 }
 688
 689 void
 690 ccw_device_disband_done(struct ccw_device *cdev, int err)
 691 {
 692         switch (err) {
 693         case 0:
 694                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
 695                 break;
 696         case -ETIME:
 697                 ccw_device_done(cdev, DEV_STATE_BOXED);
 698                 break;
 699         default:
 700                 cdev->private->flags.donotify = 0;
 701                 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 702                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 703                 break;
 704         }
 705 }
 706
 707 /*
 708  * Shutdown device.
 709  */
 710 int
 711 ccw_device_offline(struct ccw_device *cdev)
 712 {
 713         struct subchannel *sch;
 714
 715         if (ccw_device_is_orphan(cdev)) {
 716                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
 717                 return 0;
 718         }
 719         sch = to_subchannel(cdev->dev.parent);
 720         if (stsch(sch->schid, &sch->schib) || !sch->schib.pmcw.dnv)
 721                 return -ENODEV;
 722         if (cdev->private->state != DEV_STATE_ONLINE) {
 723                 if (sch->schib.scsw.actl != 0)
 724                         return -EBUSY;
 725                 return -EINVAL;
 726         }
 727         if (sch->schib.scsw.actl != 0)
 728                 return -EBUSY;
 729         /* Are we doing path grouping? */
 730         if (!cdev->private->options.pgroup) {
 731                 /* No, set state offline immediately. */
 732                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
 733                 return 0;
 734         }
 735         /* Start Set Path Group commands. */
 736         cdev->private->state = DEV_STATE_DISBAND_PGID;
 737         ccw_device_disband_start(cdev);
 738         return 0;
 739 }
 740
 741 /*
 742  * Handle timeout in device online/offline process.
 743  */
 744 static void
 745 ccw_device_onoff_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 746 {
 747         int ret;
 748
 749         ret = ccw_device_cancel_halt_clear(cdev);
 750         switch (ret) {
 751         case 0:
 752                 ccw_device_done(cdev, DEV_STATE_BOXED);
 753                 break;
 754         case -ENODEV:
 755                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 756                 break;
 757         default:
 758                 ccw_device_set_timeout(cdev, 3*HZ);
 759         }
 760 }
 761
 762 /*
 763  * Handle not oper event in device recognition.
 764  */
 765 static void
 766 ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event)
 767 {
 768         ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
 769 }
 770
 771 /*
 772  * Handle not operational event in non-special state.
 773  */
 774 static void ccw_device_generic_notoper(struct ccw_device *cdev,
 775                                        enum dev_event dev_event)
 776 {
 777         struct subchannel *sch;
 778
 779         cdev->private->state = DEV_STATE_NOT_OPER;
 780         sch = to_subchannel(cdev->dev.parent);
 781         css_schedule_eval(sch->schid);
 782 }
 783
 784 /*
 785  * Handle path verification event.
 786  */
 787 static void
 788 ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
 789 {
 790         struct subchannel *sch;
 791
 792         if (cdev->private->state == DEV_STATE_W4SENSE) {
 793                 cdev->private->flags.doverify = 1;
 794                 return;
 795         }
 796         sch = to_subchannel(cdev->dev.parent);
 797         /*
 798          * Since we might not just be coming from an interrupt from the
 799          * subchannel we have to update the schib.
 800          */
 801         stsch(sch->schid, &sch->schib);
 802
 803         if (sch->schib.scsw.actl != 0 ||
 804             (sch->schib.scsw.stctl & SCSW_STCTL_STATUS_PEND) ||
 805             (cdev->private->irb.scsw.stctl & SCSW_STCTL_STATUS_PEND)) {
 806                 /*
 807                  * No final status yet or final status not yet delivered
 808                  * to the device driver. Can't do path verfication now,
 809                  * delay until final status was delivered.
 810                  */
 811                 cdev->private->flags.doverify = 1;
 812                 return;
 813         }
 814         /* Device is idle, we can do the path verification. */
 815         cdev->private->state = DEV_STATE_VERIFY;
 816         cdev->private->flags.doverify = 0;
 817         ccw_device_verify_start(cdev);
 818 }
 819
 820 /*
 821  * Got an interrupt for a normal io (state online).
 822  */
 823 static void
 824 ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event)
 825 {
 826         struct irb *irb;
 827
 828         irb = (struct irb *) __LC_IRB;
 829         /* Check for unsolicited interrupt. */
 830         if ((irb->scsw.stctl ==
 831                         (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS))
 832             && (!irb->scsw.cc)) {
 833                 if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) &&
 834                     !irb->esw.esw0.erw.cons) {
 835                         /* Unit check but no sense data. Need basic sense. */
 836                         if (ccw_device_do_sense(cdev, irb) != 0)
 837                                 goto call_handler_unsol;
 838                         memcpy(&cdev->private->irb, irb, sizeof(struct irb));
 839                         cdev->private->state = DEV_STATE_W4SENSE;
 840                         cdev->private->intparm = 0;
 841                         return;
 842                 }
 843 call_handler_unsol:
 844                 if (cdev->handler)
 845                         cdev->handler (cdev, 0, irb);
 846                 if (cdev->private->flags.doverify)
 847                         ccw_device_online_verify(cdev, 0);
 848                 return;
 849         }
 850         /* Accumulate status and find out if a basic sense is needed. */
 851         ccw_device_accumulate_irb(cdev, irb);
 852         if (cdev->private->flags.dosense) {
 853                 if (ccw_device_do_sense(cdev, irb) == 0) {
 854                         cdev->private->state = DEV_STATE_W4SENSE;
 855                 }
 856                 return;
 857         }
 858         /* Call the handler. */
 859         if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
 860                 /* Start delayed path verification. */
 861                 ccw_device_online_verify(cdev, 0);
 862 }
 863
 864 /*
 865  * Got an timeout in online state.
 866  */
 867 static void
 868 ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 869 {
 870         int ret;
 871
 872         ccw_device_set_timeout(cdev, 0);
 873         ret = ccw_device_cancel_halt_clear(cdev);
 874         if (ret == -EBUSY) {
 875                 ccw_device_set_timeout(cdev, 3*HZ);
 876                 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
 877                 return;
 878         }
 879         if (ret == -ENODEV)
 880                 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 881         else if (cdev->handler)
 882                 cdev->handler(cdev, cdev->private->intparm,
 883                               ERR_PTR(-ETIMEDOUT));
 884 }
 885
 886 /*
 887  * Got an interrupt for a basic sense.
 888  */
 889 static void
 890 ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
 891 {
 892         struct irb *irb;
 893
 894         irb = (struct irb *) __LC_IRB;
 895         /* Check for unsolicited interrupt. */
 896         if (irb->scsw.stctl ==
 897                         (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
 898                 if (irb->scsw.cc == 1)
 899                         /* Basic sense hasn't started. Try again. */
 900                         ccw_device_do_sense(cdev, irb);
 901                 else {
 902                         CIO_MSG_EVENT(2, "Huh? 0.%x.%04x: unsolicited "
 903                                       "interrupt during w4sense...\n",
 904                                       cdev->private->dev_id.ssid,
 905                                       cdev->private->dev_id.devno);
 906                         if (cdev->handler)
 907                                 cdev->handler (cdev, 0, irb);
 908                 }
 909                 return;
 910         }
 911         /*
 912          * Check if a halt or clear has been issued in the meanwhile. If yes,
 913          * only deliver the halt/clear interrupt to the device driver as if it
 914          * had killed the original request.
 915          */
 916         if (irb->scsw.fctl & (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
 917                 /* Retry Basic Sense if requested. */
 918                 if (cdev->private->flags.intretry) {
 919                         cdev->private->flags.intretry = 0;
 920                         ccw_device_do_sense(cdev, irb);
 921                         return;
 922                 }
 923                 cdev->private->flags.dosense = 0;
 924                 memset(&cdev->private->irb, 0, sizeof(struct irb));
 925                 ccw_device_accumulate_irb(cdev, irb);
 926                 goto call_handler;
 927         }
 928         /* Add basic sense info to irb. */
 929         ccw_device_accumulate_basic_sense(cdev, irb);
 930         if (cdev->private->flags.dosense) {
 931                 /* Another basic sense is needed. */
 932                 ccw_device_do_sense(cdev, irb);
 933                 return;
 934         }
 935 call_handler:
 936         cdev->private->state = DEV_STATE_ONLINE;
 937         /* Call the handler. */
 938         if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
 939                 /* Start delayed path verification. */
 940                 ccw_device_online_verify(cdev, 0);
 941 }
 942
 943 static void
 944 ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event)
 945 {
 946         struct irb *irb;
 947
 948         irb = (struct irb *) __LC_IRB;
 949         /* Accumulate status. We don't do basic sense. */
 950         ccw_device_accumulate_irb(cdev, irb);
 951         /* Remember to clear irb to avoid residuals. */
 952         memset(&cdev->private->irb, 0, sizeof(struct irb));
 953         /* Try to start delayed device verification. */
 954         ccw_device_online_verify(cdev, 0);
 955         /* Note: Don't call handler for cio initiated clear! */
 956 }
 957
 958 static void
 959 ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
 960 {
 961         struct subchannel *sch;
 962
 963         sch = to_subchannel(cdev->dev.parent);
 964         ccw_device_set_timeout(cdev, 0);
 965         /* Start delayed path verification. */
 966         ccw_device_online_verify(cdev, 0);
 967         /* OK, i/o is dead now. Call interrupt handler. */
 968         if (cdev->handler)
 969                 cdev->handler(cdev, cdev->private->intparm,
 970                               ERR_PTR(-EIO));
 971 }
 972
 973 static void
 974 ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 975 {
 976         int ret;
 977
 978         ret = ccw_device_cancel_halt_clear(cdev);
 979         if (ret == -EBUSY) {
 980                 ccw_device_set_timeout(cdev, 3*HZ);
 981                 return;
 982         }
 983         /* Start delayed path verification. */
 984         ccw_device_online_verify(cdev, 0);
 985         if (cdev->handler)
 986                 cdev->handler(cdev, cdev->private->intparm,
 987                               ERR_PTR(-EIO));
 988 }
 989
 990 void device_kill_io(struct subchannel *sch)
 991 {
 992         int ret;
 993         struct ccw_device *cdev;
 994
 995         cdev = sch_get_cdev(sch);
 996         ret = ccw_device_cancel_halt_clear(cdev);
 997         if (ret == -EBUSY) {
 998                 ccw_device_set_timeout(cdev, 3*HZ);
 999                 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
1000                 return;
1001         }
1002         /* Start delayed path verification. */
1003         ccw_device_online_verify(cdev, 0);
1004         if (cdev->handler)
1005                 cdev->handler(cdev, cdev->private->intparm,
1006                               ERR_PTR(-EIO));
1007 }
1008
1009 static void
1010 ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event)
1011 {
1012         /* Start verification after current task finished. */
1013         cdev->private->flags.doverify = 1;
1014 }
1015
1016 static void
1017 ccw_device_stlck_done(struct ccw_device *cdev, enum dev_event dev_event)
1018 {
1019         struct irb *irb;
1020
1021         switch (dev_event) {
1022         case DEV_EVENT_INTERRUPT:
1023                 irb = (struct irb *) __LC_IRB;
1024                 /* Check for unsolicited interrupt. */
1025                 if ((irb->scsw.stctl ==
1026                      (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) &&
1027                     (!irb->scsw.cc))
1028                         /* FIXME: we should restart stlck here, but this
1029                          * is extremely unlikely ... */
1030                         goto out_wakeup;
1031
1032                 ccw_device_accumulate_irb(cdev, irb);
1033                 /* We don't care about basic sense etc. */
1034                 break;
1035         default: /* timeout */
1036                 break;
1037         }
1038 out_wakeup:
1039         wake_up(&cdev->private->wait_q);
1040 }
1041
1042 static void
1043 ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
1044 {
1045         struct subchannel *sch;
1046
1047         sch = to_subchannel(cdev->dev.parent);
1048         if (cio_enable_subchannel(sch, sch->schib.pmcw.isc,
1049                                   (u32)(addr_t)sch) != 0)
1050                 /* Couldn't enable the subchannel for i/o. Sick device. */
1051                 return;
1052
1053         /* After 60s the device recognition is considered to have failed. */
1054         ccw_device_set_timeout(cdev, 60*HZ);
1055
1056         cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
1057         ccw_device_sense_id_start(cdev);
1058 }
1059
1060 void
1061 device_trigger_reprobe(struct subchannel *sch)
1062 {
1063         struct ccw_device *cdev;
1064
1065         cdev = sch_get_cdev(sch);
1066         if (!cdev)
1067                 return;
1068         if (cdev->private->state != DEV_STATE_DISCONNECTED)
1069                 return;
1070
1071         /* Update some values. */
1072         if (stsch(sch->schid, &sch->schib))
1073                 return;
1074         if (!sch->schib.pmcw.dnv)
1075                 return;
1076         /*
1077          * The pim, pam, pom values may not be accurate, but they are the best
1078          * we have before performing device selection :/
1079          */
1080         sch->lpm = sch->schib.pmcw.pam & sch->opm;
1081         /* Re-set some bits in the pmcw that were lost. */
1082         sch->schib.pmcw.isc = 3;
1083         sch->schib.pmcw.csense = 1;
1084         sch->schib.pmcw.ena = 0;
1085         if ((sch->lpm & (sch->lpm - 1)) != 0)
1086                 sch->schib.pmcw.mp = 1;
1087         sch->schib.pmcw.intparm = (u32)(addr_t)sch;
1088         /* We should also udate ssd info, but this has to wait. */
1089         /* Check if this is another device which appeared on the same sch. */
1090         if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {
1091                 PREPARE_WORK(&cdev->private->kick_work,
1092                              ccw_device_move_to_orphanage);
1093                 queue_work(slow_path_wq, &cdev->private->kick_work);
1094         } else
1095                 ccw_device_start_id(cdev, 0);
1096 }
1097
1098 static void
1099 ccw_device_offline_irq(struct ccw_device *cdev, enum dev_event dev_event)
1100 {
1101         struct subchannel *sch;
1102
1103         sch = to_subchannel(cdev->dev.parent);
1104         /*
1105          * An interrupt in state offline means a previous disable was not
1106          * successful. Try again.
1107          */
1108         cio_disable_subchannel(sch);
1109 }
1110
1111 static void
1112 ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event)
1113 {
1114         retry_set_schib(cdev);
1115         cdev->private->state = DEV_STATE_ONLINE;
1116         dev_fsm_event(cdev, dev_event);
1117 }
1118
1119 static void ccw_device_update_cmfblock(struct ccw_device *cdev,
1120                                        enum dev_event dev_event)
1121 {
1122         cmf_retry_copy_block(cdev);
1123         cdev->private->state = DEV_STATE_ONLINE;
1124         dev_fsm_event(cdev, dev_event);
1125 }
1126
1127 static void
1128 ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
1129 {
1130         ccw_device_set_timeout(cdev, 0);
1131         if (dev_event == DEV_EVENT_NOTOPER)
1132                 cdev->private->state = DEV_STATE_NOT_OPER;
1133         else
1134                 cdev->private->state = DEV_STATE_OFFLINE;
1135         wake_up(&cdev->private->wait_q);
1136 }
1137
1138 static void
1139 ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event)
1140 {
1141         int ret;
1142
1143         ret = ccw_device_cancel_halt_clear(cdev);
1144         switch (ret) {
1145         case 0:
1146                 cdev->private->state = DEV_STATE_OFFLINE;
1147                 wake_up(&cdev->private->wait_q);
1148                 break;
1149         case -ENODEV:
1150                 cdev->private->state = DEV_STATE_NOT_OPER;
1151                 wake_up(&cdev->private->wait_q);
1152                 break;
1153         default:
1154                 ccw_device_set_timeout(cdev, HZ/10);
1155         }
1156 }
1157
1158 /*
1159  * No operation action. This is used e.g. to ignore a timeout event in
1160  * state offline.
1161  */
1162 static void
1163 ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
1164 {
1165 }
1166
1167 /*
1168  * Bug operation action.
1169  */
1170 static void
1171 ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event)
1172 {
1173         CIO_MSG_EVENT(0, "dev_jumptable[%i][%i] == NULL\n",
1174                       cdev->private->state, dev_event);
1175         BUG();
1176 }
1177
1178 /*
1179  * device statemachine
1180  */
1181 fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1182         [DEV_STATE_NOT_OPER] = {
1183                 [DEV_EVENT_NOTOPER]     = ccw_device_nop,
1184                 [DEV_EVENT_INTERRUPT]   = ccw_device_bug,
1185                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1186                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1187         },
1188         [DEV_STATE_SENSE_PGID] = {
1189                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1190                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_pgid_irq,
1191                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1192                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1193         },
1194         [DEV_STATE_SENSE_ID] = {
1195                 [DEV_EVENT_NOTOPER]     = ccw_device_recog_notoper,
1196                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_id_irq,
1197                 [DEV_EVENT_TIMEOUT]     = ccw_device_recog_timeout,
1198                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1199         },
1200         [DEV_STATE_OFFLINE] = {
1201                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1202                 [DEV_EVENT_INTERRUPT]   = ccw_device_offline_irq,
1203                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1204                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1205         },
1206         [DEV_STATE_VERIFY] = {
1207                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1208                 [DEV_EVENT_INTERRUPT]   = ccw_device_verify_irq,
1209                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1210                 [DEV_EVENT_VERIFY]      = ccw_device_delay_verify,
1211         },
1212         [DEV_STATE_ONLINE] = {
1213                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1214                 [DEV_EVENT_INTERRUPT]   = ccw_device_irq,
1215                 [DEV_EVENT_TIMEOUT]     = ccw_device_online_timeout,
1216                 [DEV_EVENT_VERIFY]      = ccw_device_online_verify,
1217         },
1218         [DEV_STATE_W4SENSE] = {
1219                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1220                 [DEV_EVENT_INTERRUPT]   = ccw_device_w4sense,
1221                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1222                 [DEV_EVENT_VERIFY]      = ccw_device_online_verify,
1223         },
1224         [DEV_STATE_DISBAND_PGID] = {
1225                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1226                 [DEV_EVENT_INTERRUPT]   = ccw_device_disband_irq,
1227                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1228                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1229         },
1230         [DEV_STATE_BOXED] = {
1231                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1232                 [DEV_EVENT_INTERRUPT]   = ccw_device_stlck_done,
1233                 [DEV_EVENT_TIMEOUT]     = ccw_device_stlck_done,
1234                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1235         },
1236         /* states to wait for i/o completion before doing something */
1237         [DEV_STATE_CLEAR_VERIFY] = {
1238                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1239                 [DEV_EVENT_INTERRUPT]   = ccw_device_clear_verify,
1240                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1241                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1242         },
1243         [DEV_STATE_TIMEOUT_KILL] = {
1244                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1245                 [DEV_EVENT_INTERRUPT]   = ccw_device_killing_irq,
1246                 [DEV_EVENT_TIMEOUT]     = ccw_device_killing_timeout,
1247                 [DEV_EVENT_VERIFY]      = ccw_device_nop, //FIXME
1248         },
1249         [DEV_STATE_QUIESCE] = {
1250                 [DEV_EVENT_NOTOPER]     = ccw_device_quiesce_done,
1251                 [DEV_EVENT_INTERRUPT]   = ccw_device_quiesce_done,
1252                 [DEV_EVENT_TIMEOUT]     = ccw_device_quiesce_timeout,
1253                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1254         },
1255         /* special states for devices gone not operational */
1256         [DEV_STATE_DISCONNECTED] = {
1257                 [DEV_EVENT_NOTOPER]     = ccw_device_nop,
1258                 [DEV_EVENT_INTERRUPT]   = ccw_device_start_id,
1259                 [DEV_EVENT_TIMEOUT]     = ccw_device_bug,
1260                 [DEV_EVENT_VERIFY]      = ccw_device_start_id,
1261         },
1262         [DEV_STATE_DISCONNECTED_SENSE_ID] = {
1263                 [DEV_EVENT_NOTOPER]     = ccw_device_recog_notoper,
1264                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_id_irq,
1265                 [DEV_EVENT_TIMEOUT]     = ccw_device_recog_timeout,
1266                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1267         },
1268         [DEV_STATE_CMFCHANGE] = {
1269                 [DEV_EVENT_NOTOPER]     = ccw_device_change_cmfstate,
1270                 [DEV_EVENT_INTERRUPT]   = ccw_device_change_cmfstate,
1271                 [DEV_EVENT_TIMEOUT]     = ccw_device_change_cmfstate,
1272                 [DEV_EVENT_VERIFY]      = ccw_device_change_cmfstate,
1273         },
1274         [DEV_STATE_CMFUPDATE] = {
1275                 [DEV_EVENT_NOTOPER]     = ccw_device_update_cmfblock,
1276                 [DEV_EVENT_INTERRUPT]   = ccw_device_update_cmfblock,
1277                 [DEV_EVENT_TIMEOUT]     = ccw_device_update_cmfblock,
1278                 [DEV_EVENT_VERIFY]      = ccw_device_update_cmfblock,
1279         },
1280 };
1281
1282 EXPORT_SYMBOL_GPL(ccw_device_set_timeout);