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         if (!sch->dev.driver_data)
  36                 return 0;
  37         cdev = sch->dev.driver_data;
  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         if (!sch->dev.driver_data)
  47                 return 0;
  48         cdev = sch->dev.driver_data;
  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         if (!sch->dev.driver_data)
  59                 return;
  60         cdev = sch->dev.driver_data;
  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->dev.driver_data;
  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->dev.driver_data;
  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         if (!sch->dev.driver_data)
 179                 return;
 180         cdev = sch->dev.driver_data;
 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         if (ret != 0)
 558                 /* Couldn't enable the subchannel for i/o. Sick device. */
 559                 return ret;
 560
 561         /* After 60s the device recognition is considered to have failed. */
 562         ccw_device_set_timeout(cdev, 60*HZ);
 563
 564         /*
 565          * We used to start here with a sense pgid to find out whether a device
 566          * is locked by someone else. Unfortunately, the sense pgid command
 567          * code has other meanings on devices predating the path grouping
 568          * algorithm, so we start with sense id and box the device after an
 569          * timeout (or if sense pgid during path verification detects the device
 570          * is locked, as may happen on newer devices).
 571          */
 572         cdev->private->flags.recog_done = 0;
 573         cdev->private->state = DEV_STATE_SENSE_ID;
 574         ccw_device_sense_id_start(cdev);
 575         return 0;
 576 }
 577
 578 /*
 579  * Handle timeout in device recognition.
 580  */
 581 static void
 582 ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 583 {
 584         int ret;
 585
 586         ret = ccw_device_cancel_halt_clear(cdev);
 587         switch (ret) {
 588         case 0:
 589                 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
 590                 break;
 591         case -ENODEV:
 592                 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
 593                 break;
 594         default:
 595                 ccw_device_set_timeout(cdev, 3*HZ);
 596         }
 597 }
 598
 599
 600 void
 601 ccw_device_verify_done(struct ccw_device *cdev, int err)
 602 {
 603         struct subchannel *sch;
 604
 605         sch = to_subchannel(cdev->dev.parent);
 606         /* Update schib - pom may have changed. */
 607         stsch(sch->schid, &sch->schib);
 608         /* Update lpm with verified path mask. */
 609         sch->lpm = sch->vpm;
 610         /* Repeat path verification? */
 611         if (cdev->private->flags.doverify) {
 612                 cdev->private->flags.doverify = 0;
 613                 ccw_device_verify_start(cdev);
 614                 return;
 615         }
 616         switch (err) {
 617         case -EOPNOTSUPP: /* path grouping not supported, just set online. */
 618                 cdev->private->options.pgroup = 0;
 619         case 0:
 620                 ccw_device_done(cdev, DEV_STATE_ONLINE);
 621                 /* Deliver fake irb to device driver, if needed. */
 622                 if (cdev->private->flags.fake_irb) {
 623                         memset(&cdev->private->irb, 0, sizeof(struct irb));
 624                         cdev->private->irb.scsw.cc = 1;
 625                         cdev->private->irb.scsw.fctl = SCSW_FCTL_START_FUNC;
 626                         cdev->private->irb.scsw.actl = SCSW_ACTL_START_PEND;
 627                         cdev->private->irb.scsw.stctl = SCSW_STCTL_STATUS_PEND;
 628                         cdev->private->flags.fake_irb = 0;
 629                         if (cdev->handler)
 630                                 cdev->handler(cdev, cdev->private->intparm,
 631                                               &cdev->private->irb);
 632                         memset(&cdev->private->irb, 0, sizeof(struct irb));
 633                 }
 634                 break;
 635         case -ETIME:
 636                 /* Reset oper notify indication after verify error. */
 637                 cdev->private->flags.donotify = 0;
 638                 ccw_device_done(cdev, DEV_STATE_BOXED);
 639                 break;
 640         default:
 641                 /* Reset oper notify indication after verify error. */
 642                 cdev->private->flags.donotify = 0;
 643                 if (cdev->online)
 644                         dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 645                 else
 646                         ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 647                 break;
 648         }
 649 }
 650
 651 /*
 652  * Get device online.
 653  */
 654 int
 655 ccw_device_online(struct ccw_device *cdev)
 656 {
 657         struct subchannel *sch;
 658         int ret;
 659
 660         if ((cdev->private->state != DEV_STATE_OFFLINE) &&
 661             (cdev->private->state != DEV_STATE_BOXED))
 662                 return -EINVAL;
 663         sch = to_subchannel(cdev->dev.parent);
 664         if (css_init_done && !get_device(&cdev->dev))
 665                 return -ENODEV;
 666         ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc);
 667         if (ret != 0) {
 668                 /* Couldn't enable the subchannel for i/o. Sick device. */
 669                 if (ret == -ENODEV)
 670                         dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 671                 return ret;
 672         }
 673         /* Do we want to do path grouping? */
 674         if (!cdev->private->options.pgroup) {
 675                 /* Start initial path verification. */
 676                 cdev->private->state = DEV_STATE_VERIFY;
 677                 cdev->private->flags.doverify = 0;
 678                 ccw_device_verify_start(cdev);
 679                 return 0;
 680         }
 681         /* Do a SensePGID first. */
 682         cdev->private->state = DEV_STATE_SENSE_PGID;
 683         ccw_device_sense_pgid_start(cdev);
 684         return 0;
 685 }
 686
 687 void
 688 ccw_device_disband_done(struct ccw_device *cdev, int err)
 689 {
 690         switch (err) {
 691         case 0:
 692                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
 693                 break;
 694         case -ETIME:
 695                 ccw_device_done(cdev, DEV_STATE_BOXED);
 696                 break;
 697         default:
 698                 cdev->private->flags.donotify = 0;
 699                 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 700                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 701                 break;
 702         }
 703 }
 704
 705 /*
 706  * Shutdown device.
 707  */
 708 int
 709 ccw_device_offline(struct ccw_device *cdev)
 710 {
 711         struct subchannel *sch;
 712
 713         if (ccw_device_is_orphan(cdev)) {
 714                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
 715                 return 0;
 716         }
 717         sch = to_subchannel(cdev->dev.parent);
 718         if (stsch(sch->schid, &sch->schib) || !sch->schib.pmcw.dnv)
 719                 return -ENODEV;
 720         if (cdev->private->state != DEV_STATE_ONLINE) {
 721                 if (sch->schib.scsw.actl != 0)
 722                         return -EBUSY;
 723                 return -EINVAL;
 724         }
 725         if (sch->schib.scsw.actl != 0)
 726                 return -EBUSY;
 727         /* Are we doing path grouping? */
 728         if (!cdev->private->options.pgroup) {
 729                 /* No, set state offline immediately. */
 730                 ccw_device_done(cdev, DEV_STATE_OFFLINE);
 731                 return 0;
 732         }
 733         /* Start Set Path Group commands. */
 734         cdev->private->state = DEV_STATE_DISBAND_PGID;
 735         ccw_device_disband_start(cdev);
 736         return 0;
 737 }
 738
 739 /*
 740  * Handle timeout in device online/offline process.
 741  */
 742 static void
 743 ccw_device_onoff_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 744 {
 745         int ret;
 746
 747         ret = ccw_device_cancel_halt_clear(cdev);
 748         switch (ret) {
 749         case 0:
 750                 ccw_device_done(cdev, DEV_STATE_BOXED);
 751                 break;
 752         case -ENODEV:
 753                 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
 754                 break;
 755         default:
 756                 ccw_device_set_timeout(cdev, 3*HZ);
 757         }
 758 }
 759
 760 /*
 761  * Handle not oper event in device recognition.
 762  */
 763 static void
 764 ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event)
 765 {
 766         ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
 767 }
 768
 769 /*
 770  * Handle not operational event in non-special state.
 771  */
 772 static void ccw_device_generic_notoper(struct ccw_device *cdev,
 773                                        enum dev_event dev_event)
 774 {
 775         struct subchannel *sch;
 776
 777         cdev->private->state = DEV_STATE_NOT_OPER;
 778         sch = to_subchannel(cdev->dev.parent);
 779         css_schedule_eval(sch->schid);
 780 }
 781
 782 /*
 783  * Handle path verification event.
 784  */
 785 static void
 786 ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
 787 {
 788         struct subchannel *sch;
 789
 790         if (cdev->private->state == DEV_STATE_W4SENSE) {
 791                 cdev->private->flags.doverify = 1;
 792                 return;
 793         }
 794         sch = to_subchannel(cdev->dev.parent);
 795         /*
 796          * Since we might not just be coming from an interrupt from the
 797          * subchannel we have to update the schib.
 798          */
 799         stsch(sch->schid, &sch->schib);
 800
 801         if (sch->schib.scsw.actl != 0 ||
 802             (sch->schib.scsw.stctl & SCSW_STCTL_STATUS_PEND) ||
 803             (cdev->private->irb.scsw.stctl & SCSW_STCTL_STATUS_PEND)) {
 804                 /*
 805                  * No final status yet or final status not yet delivered
 806                  * to the device driver. Can't do path verfication now,
 807                  * delay until final status was delivered.
 808                  */
 809                 cdev->private->flags.doverify = 1;
 810                 return;
 811         }
 812         /* Device is idle, we can do the path verification. */
 813         cdev->private->state = DEV_STATE_VERIFY;
 814         cdev->private->flags.doverify = 0;
 815         ccw_device_verify_start(cdev);
 816 }
 817
 818 /*
 819  * Got an interrupt for a normal io (state online).
 820  */
 821 static void
 822 ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event)
 823 {
 824         struct irb *irb;
 825
 826         irb = (struct irb *) __LC_IRB;
 827         /* Check for unsolicited interrupt. */
 828         if ((irb->scsw.stctl ==
 829                         (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS))
 830             && (!irb->scsw.cc)) {
 831                 if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) &&
 832                     !irb->esw.esw0.erw.cons) {
 833                         /* Unit check but no sense data. Need basic sense. */
 834                         if (ccw_device_do_sense(cdev, irb) != 0)
 835                                 goto call_handler_unsol;
 836                         memcpy(&cdev->private->irb, irb, sizeof(struct irb));
 837                         cdev->private->state = DEV_STATE_W4SENSE;
 838                         cdev->private->intparm = 0;
 839                         return;
 840                 }
 841 call_handler_unsol:
 842                 if (cdev->handler)
 843                         cdev->handler (cdev, 0, irb);
 844                 if (cdev->private->flags.doverify)
 845                         ccw_device_online_verify(cdev, 0);
 846                 return;
 847         }
 848         /* Accumulate status and find out if a basic sense is needed. */
 849         ccw_device_accumulate_irb(cdev, irb);
 850         if (cdev->private->flags.dosense) {
 851                 if (ccw_device_do_sense(cdev, irb) == 0) {
 852                         cdev->private->state = DEV_STATE_W4SENSE;
 853                 }
 854                 return;
 855         }
 856         /* Call the handler. */
 857         if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
 858                 /* Start delayed path verification. */
 859                 ccw_device_online_verify(cdev, 0);
 860 }
 861
 862 /*
 863  * Got an timeout in online state.
 864  */
 865 static void
 866 ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 867 {
 868         int ret;
 869
 870         ccw_device_set_timeout(cdev, 0);
 871         ret = ccw_device_cancel_halt_clear(cdev);
 872         if (ret == -EBUSY) {
 873                 ccw_device_set_timeout(cdev, 3*HZ);
 874                 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
 875                 return;
 876         }
 877         if (ret == -ENODEV)
 878                 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
 879         else if (cdev->handler)
 880                 cdev->handler(cdev, cdev->private->intparm,
 881                               ERR_PTR(-ETIMEDOUT));
 882 }
 883
 884 /*
 885  * Got an interrupt for a basic sense.
 886  */
 887 static void
 888 ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
 889 {
 890         struct irb *irb;
 891
 892         irb = (struct irb *) __LC_IRB;
 893         /* Check for unsolicited interrupt. */
 894         if (irb->scsw.stctl ==
 895                         (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
 896                 if (irb->scsw.cc == 1)
 897                         /* Basic sense hasn't started. Try again. */
 898                         ccw_device_do_sense(cdev, irb);
 899                 else {
 900                         CIO_MSG_EVENT(2, "Huh? 0.%x.%04x: unsolicited "
 901                                       "interrupt during w4sense...\n",
 902                                       cdev->private->dev_id.ssid,
 903                                       cdev->private->dev_id.devno);
 904                         if (cdev->handler)
 905                                 cdev->handler (cdev, 0, irb);
 906                 }
 907                 return;
 908         }
 909         /*
 910          * Check if a halt or clear has been issued in the meanwhile. If yes,
 911          * only deliver the halt/clear interrupt to the device driver as if it
 912          * had killed the original request.
 913          */
 914         if (irb->scsw.fctl & (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
 915                 /* Retry Basic Sense if requested. */
 916                 if (cdev->private->flags.intretry) {
 917                         cdev->private->flags.intretry = 0;
 918                         ccw_device_do_sense(cdev, irb);
 919                         return;
 920                 }
 921                 cdev->private->flags.dosense = 0;
 922                 memset(&cdev->private->irb, 0, sizeof(struct irb));
 923                 ccw_device_accumulate_irb(cdev, irb);
 924                 goto call_handler;
 925         }
 926         /* Add basic sense info to irb. */
 927         ccw_device_accumulate_basic_sense(cdev, irb);
 928         if (cdev->private->flags.dosense) {
 929                 /* Another basic sense is needed. */
 930                 ccw_device_do_sense(cdev, irb);
 931                 return;
 932         }
 933 call_handler:
 934         cdev->private->state = DEV_STATE_ONLINE;
 935         /* Call the handler. */
 936         if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
 937                 /* Start delayed path verification. */
 938                 ccw_device_online_verify(cdev, 0);
 939 }
 940
 941 static void
 942 ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event)
 943 {
 944         struct irb *irb;
 945
 946         irb = (struct irb *) __LC_IRB;
 947         /* Accumulate status. We don't do basic sense. */
 948         ccw_device_accumulate_irb(cdev, irb);
 949         /* Remember to clear irb to avoid residuals. */
 950         memset(&cdev->private->irb, 0, sizeof(struct irb));
 951         /* Try to start delayed device verification. */
 952         ccw_device_online_verify(cdev, 0);
 953         /* Note: Don't call handler for cio initiated clear! */
 954 }
 955
 956 static void
 957 ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
 958 {
 959         struct subchannel *sch;
 960
 961         sch = to_subchannel(cdev->dev.parent);
 962         ccw_device_set_timeout(cdev, 0);
 963         /* Start delayed path verification. */
 964         ccw_device_online_verify(cdev, 0);
 965         /* OK, i/o is dead now. Call interrupt handler. */
 966         if (cdev->handler)
 967                 cdev->handler(cdev, cdev->private->intparm,
 968                               ERR_PTR(-EIO));
 969 }
 970
 971 static void
 972 ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
 973 {
 974         int ret;
 975
 976         ret = ccw_device_cancel_halt_clear(cdev);
 977         if (ret == -EBUSY) {
 978                 ccw_device_set_timeout(cdev, 3*HZ);
 979                 return;
 980         }
 981         /* Start delayed path verification. */
 982         ccw_device_online_verify(cdev, 0);
 983         if (cdev->handler)
 984                 cdev->handler(cdev, cdev->private->intparm,
 985                               ERR_PTR(-EIO));
 986 }
 987
 988 void device_kill_io(struct subchannel *sch)
 989 {
 990         int ret;
 991         struct ccw_device *cdev;
 992
 993         cdev = sch->dev.driver_data;
 994         ret = ccw_device_cancel_halt_clear(cdev);
 995         if (ret == -EBUSY) {
 996                 ccw_device_set_timeout(cdev, 3*HZ);
 997                 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
 998                 return;
 999         }
1000         /* Start delayed path verification. */
1001         ccw_device_online_verify(cdev, 0);
1002         if (cdev->handler)
1003                 cdev->handler(cdev, cdev->private->intparm,
1004                               ERR_PTR(-EIO));
1005 }
1006
1007 static void
1008 ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event)
1009 {
1010         /* Start verification after current task finished. */
1011         cdev->private->flags.doverify = 1;
1012 }
1013
1014 static void
1015 ccw_device_stlck_done(struct ccw_device *cdev, enum dev_event dev_event)
1016 {
1017         struct irb *irb;
1018
1019         switch (dev_event) {
1020         case DEV_EVENT_INTERRUPT:
1021                 irb = (struct irb *) __LC_IRB;
1022                 /* Check for unsolicited interrupt. */
1023                 if ((irb->scsw.stctl ==
1024                      (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) &&
1025                     (!irb->scsw.cc))
1026                         /* FIXME: we should restart stlck here, but this
1027                          * is extremely unlikely ... */
1028                         goto out_wakeup;
1029
1030                 ccw_device_accumulate_irb(cdev, irb);
1031                 /* We don't care about basic sense etc. */
1032                 break;
1033         default: /* timeout */
1034                 break;
1035         }
1036 out_wakeup:
1037         wake_up(&cdev->private->wait_q);
1038 }
1039
1040 static void
1041 ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
1042 {
1043         struct subchannel *sch;
1044
1045         sch = to_subchannel(cdev->dev.parent);
1046         if (cio_enable_subchannel(sch, sch->schib.pmcw.isc) != 0)
1047                 /* Couldn't enable the subchannel for i/o. Sick device. */
1048                 return;
1049
1050         /* After 60s the device recognition is considered to have failed. */
1051         ccw_device_set_timeout(cdev, 60*HZ);
1052
1053         cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
1054         ccw_device_sense_id_start(cdev);
1055 }
1056
1057 void
1058 device_trigger_reprobe(struct subchannel *sch)
1059 {
1060         struct ccw_device *cdev;
1061
1062         if (!sch->dev.driver_data)
1063                 return;
1064         cdev = sch->dev.driver_data;
1065         if (cdev->private->state != DEV_STATE_DISCONNECTED)
1066                 return;
1067
1068         /* Update some values. */
1069         if (stsch(sch->schid, &sch->schib))
1070                 return;
1071         if (!sch->schib.pmcw.dnv)
1072                 return;
1073         /*
1074          * The pim, pam, pom values may not be accurate, but they are the best
1075          * we have before performing device selection :/
1076          */
1077         sch->lpm = sch->schib.pmcw.pam & sch->opm;
1078         /* Re-set some bits in the pmcw that were lost. */
1079         sch->schib.pmcw.isc = 3;
1080         sch->schib.pmcw.csense = 1;
1081         sch->schib.pmcw.ena = 0;
1082         if ((sch->lpm & (sch->lpm - 1)) != 0)
1083                 sch->schib.pmcw.mp = 1;
1084         sch->schib.pmcw.intparm = (u32)(addr_t)sch;
1085         /* We should also udate ssd info, but this has to wait. */
1086         /* Check if this is another device which appeared on the same sch. */
1087         if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {
1088                 PREPARE_WORK(&cdev->private->kick_work,
1089                              ccw_device_move_to_orphanage);
1090                 queue_work(slow_path_wq, &cdev->private->kick_work);
1091         } else
1092                 ccw_device_start_id(cdev, 0);
1093 }
1094
1095 static void
1096 ccw_device_offline_irq(struct ccw_device *cdev, enum dev_event dev_event)
1097 {
1098         struct subchannel *sch;
1099
1100         sch = to_subchannel(cdev->dev.parent);
1101         /*
1102          * An interrupt in state offline means a previous disable was not
1103          * successful. Try again.
1104          */
1105         cio_disable_subchannel(sch);
1106 }
1107
1108 static void
1109 ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event)
1110 {
1111         retry_set_schib(cdev);
1112         cdev->private->state = DEV_STATE_ONLINE;
1113         dev_fsm_event(cdev, dev_event);
1114 }
1115
1116 static void ccw_device_update_cmfblock(struct ccw_device *cdev,
1117                                        enum dev_event dev_event)
1118 {
1119         cmf_retry_copy_block(cdev);
1120         cdev->private->state = DEV_STATE_ONLINE;
1121         dev_fsm_event(cdev, dev_event);
1122 }
1123
1124 static void
1125 ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
1126 {
1127         ccw_device_set_timeout(cdev, 0);
1128         if (dev_event == DEV_EVENT_NOTOPER)
1129                 cdev->private->state = DEV_STATE_NOT_OPER;
1130         else
1131                 cdev->private->state = DEV_STATE_OFFLINE;
1132         wake_up(&cdev->private->wait_q);
1133 }
1134
1135 static void
1136 ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event)
1137 {
1138         int ret;
1139
1140         ret = ccw_device_cancel_halt_clear(cdev);
1141         switch (ret) {
1142         case 0:
1143                 cdev->private->state = DEV_STATE_OFFLINE;
1144                 wake_up(&cdev->private->wait_q);
1145                 break;
1146         case -ENODEV:
1147                 cdev->private->state = DEV_STATE_NOT_OPER;
1148                 wake_up(&cdev->private->wait_q);
1149                 break;
1150         default:
1151                 ccw_device_set_timeout(cdev, HZ/10);
1152         }
1153 }
1154
1155 /*
1156  * No operation action. This is used e.g. to ignore a timeout event in
1157  * state offline.
1158  */
1159 static void
1160 ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
1161 {
1162 }
1163
1164 /*
1165  * Bug operation action.
1166  */
1167 static void
1168 ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event)
1169 {
1170         CIO_MSG_EVENT(0, "dev_jumptable[%i][%i] == NULL\n",
1171                       cdev->private->state, dev_event);
1172         BUG();
1173 }
1174
1175 /*
1176  * device statemachine
1177  */
1178 fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1179         [DEV_STATE_NOT_OPER] = {
1180                 [DEV_EVENT_NOTOPER]     = ccw_device_nop,
1181                 [DEV_EVENT_INTERRUPT]   = ccw_device_bug,
1182                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1183                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1184         },
1185         [DEV_STATE_SENSE_PGID] = {
1186                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1187                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_pgid_irq,
1188                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1189                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1190         },
1191         [DEV_STATE_SENSE_ID] = {
1192                 [DEV_EVENT_NOTOPER]     = ccw_device_recog_notoper,
1193                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_id_irq,
1194                 [DEV_EVENT_TIMEOUT]     = ccw_device_recog_timeout,
1195                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1196         },
1197         [DEV_STATE_OFFLINE] = {
1198                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1199                 [DEV_EVENT_INTERRUPT]   = ccw_device_offline_irq,
1200                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1201                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1202         },
1203         [DEV_STATE_VERIFY] = {
1204                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1205                 [DEV_EVENT_INTERRUPT]   = ccw_device_verify_irq,
1206                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1207                 [DEV_EVENT_VERIFY]      = ccw_device_delay_verify,
1208         },
1209         [DEV_STATE_ONLINE] = {
1210                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1211                 [DEV_EVENT_INTERRUPT]   = ccw_device_irq,
1212                 [DEV_EVENT_TIMEOUT]     = ccw_device_online_timeout,
1213                 [DEV_EVENT_VERIFY]      = ccw_device_online_verify,
1214         },
1215         [DEV_STATE_W4SENSE] = {
1216                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1217                 [DEV_EVENT_INTERRUPT]   = ccw_device_w4sense,
1218                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1219                 [DEV_EVENT_VERIFY]      = ccw_device_online_verify,
1220         },
1221         [DEV_STATE_DISBAND_PGID] = {
1222                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1223                 [DEV_EVENT_INTERRUPT]   = ccw_device_disband_irq,
1224                 [DEV_EVENT_TIMEOUT]     = ccw_device_onoff_timeout,
1225                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1226         },
1227         [DEV_STATE_BOXED] = {
1228                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1229                 [DEV_EVENT_INTERRUPT]   = ccw_device_stlck_done,
1230                 [DEV_EVENT_TIMEOUT]     = ccw_device_stlck_done,
1231                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1232         },
1233         /* states to wait for i/o completion before doing something */
1234         [DEV_STATE_CLEAR_VERIFY] = {
1235                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1236                 [DEV_EVENT_INTERRUPT]   = ccw_device_clear_verify,
1237                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
1238                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1239         },
1240         [DEV_STATE_TIMEOUT_KILL] = {
1241                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
1242                 [DEV_EVENT_INTERRUPT]   = ccw_device_killing_irq,
1243                 [DEV_EVENT_TIMEOUT]     = ccw_device_killing_timeout,
1244                 [DEV_EVENT_VERIFY]      = ccw_device_nop, //FIXME
1245         },
1246         [DEV_STATE_QUIESCE] = {
1247                 [DEV_EVENT_NOTOPER]     = ccw_device_quiesce_done,
1248                 [DEV_EVENT_INTERRUPT]   = ccw_device_quiesce_done,
1249                 [DEV_EVENT_TIMEOUT]     = ccw_device_quiesce_timeout,
1250                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1251         },
1252         /* special states for devices gone not operational */
1253         [DEV_STATE_DISCONNECTED] = {
1254                 [DEV_EVENT_NOTOPER]     = ccw_device_nop,
1255                 [DEV_EVENT_INTERRUPT]   = ccw_device_start_id,
1256                 [DEV_EVENT_TIMEOUT]     = ccw_device_bug,
1257                 [DEV_EVENT_VERIFY]      = ccw_device_start_id,
1258         },
1259         [DEV_STATE_DISCONNECTED_SENSE_ID] = {
1260                 [DEV_EVENT_NOTOPER]     = ccw_device_recog_notoper,
1261                 [DEV_EVENT_INTERRUPT]   = ccw_device_sense_id_irq,
1262                 [DEV_EVENT_TIMEOUT]     = ccw_device_recog_timeout,
1263                 [DEV_EVENT_VERIFY]      = ccw_device_nop,
1264         },
1265         [DEV_STATE_CMFCHANGE] = {
1266                 [DEV_EVENT_NOTOPER]     = ccw_device_change_cmfstate,
1267                 [DEV_EVENT_INTERRUPT]   = ccw_device_change_cmfstate,
1268                 [DEV_EVENT_TIMEOUT]     = ccw_device_change_cmfstate,
1269                 [DEV_EVENT_VERIFY]      = ccw_device_change_cmfstate,
1270         },
1271         [DEV_STATE_CMFUPDATE] = {
1272                 [DEV_EVENT_NOTOPER]     = ccw_device_update_cmfblock,
1273                 [DEV_EVENT_INTERRUPT]   = ccw_device_update_cmfblock,
1274                 [DEV_EVENT_TIMEOUT]     = ccw_device_update_cmfblock,
1275                 [DEV_EVENT_VERIFY]      = ccw_device_update_cmfblock,
1276         },
1277 };
1278
1279 EXPORT_SYMBOL_GPL(ccw_device_set_timeout);