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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-09 22:01:47 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-09 22:01:47 -0500
commit67dd2f5a669f48e48ea1013fb80522adca8287f4 (patch)
treeeee4e7f15df90f899211cde0a669d661085de05d /drivers/s390/cio/device_fsm.c
parent5327b9b83a9c45a3fcbcda224a2b02d9eea9f6bb (diff)
parent42d61b9b415686d81eaa022b846737548876e51d (diff)
Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (72 commits) [S390] 3215/3270 console: remove wrong comment [S390] dasd: remove BKL from extended error reporting code [S390] vmlogrdr: remove BKL [S390] vmur: remove BKL [S390] zcrypt: remove BKL [S390] 3270: remove BKL [S390] vmwatchdog: remove lock_kernel() from open() function [S390] monwriter: remove lock_kernel() from open() function [S390] monreader: remove lock_kernel() from open() function [S390] s390: remove unused nfsd #includes [S390] ftrace: build ftrace.o when CONFIG_FTRACE_SYSCALLS is set for s390 [S390] etr/stp: put correct per cpu variable [S390] tty3270: move keyboard compat ioctls [S390] sclp: improve servicability setting [S390] s390: use change recording override for kernel mapping [S390] MAINTAINERS: Add s390 drivers block [S390] use generic sockios.h header file [S390] use generic termbits.h header file [S390] smp: remove unused typedef and defines [S390] cmm: free pages on hibernate. ...
Diffstat (limited to 'drivers/s390/cio/device_fsm.c')
-rw-r--r--drivers/s390/cio/device_fsm.c411
1 files changed, 94 insertions, 317 deletions
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index b9613d7df9ef..ae760658a131 100644
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -229,8 +229,8 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
229 229
230 sch = to_subchannel(cdev->dev.parent); 230 sch = to_subchannel(cdev->dev.parent);
231 231
232 ccw_device_set_timeout(cdev, 0); 232 if (cio_disable_subchannel(sch))
233 cio_disable_subchannel(sch); 233 state = DEV_STATE_NOT_OPER;
234 /* 234 /*
235 * Now that we tried recognition, we have performed device selection 235 * Now that we tried recognition, we have performed device selection
236 * through ssch() and the path information is up to date. 236 * through ssch() and the path information is up to date.
@@ -263,22 +263,10 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
263 } 263 }
264 switch (state) { 264 switch (state) {
265 case DEV_STATE_NOT_OPER: 265 case DEV_STATE_NOT_OPER:
266 CIO_MSG_EVENT(2, "SenseID : unknown device %04x on "
267 "subchannel 0.%x.%04x\n",
268 cdev->private->dev_id.devno,
269 sch->schid.ssid, sch->schid.sch_no);
270 break; 266 break;
271 case DEV_STATE_OFFLINE: 267 case DEV_STATE_OFFLINE:
272 if (!cdev->online) { 268 if (!cdev->online) {
273 ccw_device_update_sense_data(cdev); 269 ccw_device_update_sense_data(cdev);
274 /* Issue device info message. */
275 CIO_MSG_EVENT(4, "SenseID : device 0.%x.%04x reports: "
276 "CU Type/Mod = %04X/%02X, Dev Type/Mod "
277 "= %04X/%02X\n",
278 cdev->private->dev_id.ssid,
279 cdev->private->dev_id.devno,
280 cdev->id.cu_type, cdev->id.cu_model,
281 cdev->id.dev_type, cdev->id.dev_model);
282 break; 270 break;
283 } 271 }
284 cdev->private->state = DEV_STATE_OFFLINE; 272 cdev->private->state = DEV_STATE_OFFLINE;
@@ -289,16 +277,10 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
289 wake_up(&cdev->private->wait_q); 277 wake_up(&cdev->private->wait_q);
290 } else { 278 } else {
291 ccw_device_update_sense_data(cdev); 279 ccw_device_update_sense_data(cdev);
292 PREPARE_WORK(&cdev->private->kick_work, 280 ccw_device_sched_todo(cdev, CDEV_TODO_REBIND);
293 ccw_device_do_unbind_bind);
294 queue_work(ccw_device_work, &cdev->private->kick_work);
295 } 281 }
296 return; 282 return;
297 case DEV_STATE_BOXED: 283 case DEV_STATE_BOXED:
298 CIO_MSG_EVENT(0, "SenseID : boxed device %04x on "
299 " subchannel 0.%x.%04x\n",
300 cdev->private->dev_id.devno,
301 sch->schid.ssid, sch->schid.sch_no);
302 if (cdev->id.cu_type != 0) { /* device was recognized before */ 284 if (cdev->id.cu_type != 0) { /* device was recognized before */
303 cdev->private->flags.recog_done = 1; 285 cdev->private->flags.recog_done = 1;
304 cdev->private->state = DEV_STATE_BOXED; 286 cdev->private->state = DEV_STATE_BOXED;
@@ -343,28 +325,16 @@ int ccw_device_notify(struct ccw_device *cdev, int event)
343 return cdev->drv->notify ? cdev->drv->notify(cdev, event) : 0; 325 return cdev->drv->notify ? cdev->drv->notify(cdev, event) : 0;
344} 326}
345 327
346static void cmf_reenable_delayed(struct work_struct *work)
347{
348 struct ccw_device_private *priv;
349 struct ccw_device *cdev;
350
351 priv = container_of(work, struct ccw_device_private, kick_work);
352 cdev = priv->cdev;
353 cmf_reenable(cdev);
354}
355
356static void ccw_device_oper_notify(struct ccw_device *cdev) 328static void ccw_device_oper_notify(struct ccw_device *cdev)
357{ 329{
358 if (ccw_device_notify(cdev, CIO_OPER)) { 330 if (ccw_device_notify(cdev, CIO_OPER)) {
359 /* Reenable channel measurements, if needed. */ 331 /* Reenable channel measurements, if needed. */
360 PREPARE_WORK(&cdev->private->kick_work, cmf_reenable_delayed); 332 ccw_device_sched_todo(cdev, CDEV_TODO_ENABLE_CMF);
361 queue_work(ccw_device_work, &cdev->private->kick_work);
362 return; 333 return;
363 } 334 }
364 /* Driver doesn't want device back. */ 335 /* Driver doesn't want device back. */
365 ccw_device_set_notoper(cdev); 336 ccw_device_set_notoper(cdev);
366 PREPARE_WORK(&cdev->private->kick_work, ccw_device_do_unbind_bind); 337 ccw_device_sched_todo(cdev, CDEV_TODO_REBIND);
367 queue_work(ccw_device_work, &cdev->private->kick_work);
368} 338}
369 339
370/* 340/*
@@ -392,14 +362,14 @@ ccw_device_done(struct ccw_device *cdev, int state)
392 CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n", 362 CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n",
393 cdev->private->dev_id.devno, sch->schid.sch_no); 363 cdev->private->dev_id.devno, sch->schid.sch_no);
394 if (cdev->online && !ccw_device_notify(cdev, CIO_BOXED)) 364 if (cdev->online && !ccw_device_notify(cdev, CIO_BOXED))
395 ccw_device_schedule_sch_unregister(cdev); 365 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
396 cdev->private->flags.donotify = 0; 366 cdev->private->flags.donotify = 0;
397 break; 367 break;
398 case DEV_STATE_NOT_OPER: 368 case DEV_STATE_NOT_OPER:
399 CIO_MSG_EVENT(0, "Device %04x gone on subchannel %04x\n", 369 CIO_MSG_EVENT(0, "Device %04x gone on subchannel %04x\n",
400 cdev->private->dev_id.devno, sch->schid.sch_no); 370 cdev->private->dev_id.devno, sch->schid.sch_no);
401 if (!ccw_device_notify(cdev, CIO_GONE)) 371 if (!ccw_device_notify(cdev, CIO_GONE))
402 ccw_device_schedule_sch_unregister(cdev); 372 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
403 else 373 else
404 ccw_device_set_disconnected(cdev); 374 ccw_device_set_disconnected(cdev);
405 cdev->private->flags.donotify = 0; 375 cdev->private->flags.donotify = 0;
@@ -409,7 +379,7 @@ ccw_device_done(struct ccw_device *cdev, int state)
409 "%04x\n", cdev->private->dev_id.devno, 379 "%04x\n", cdev->private->dev_id.devno,
410 sch->schid.sch_no); 380 sch->schid.sch_no);
411 if (!ccw_device_notify(cdev, CIO_NO_PATH)) 381 if (!ccw_device_notify(cdev, CIO_NO_PATH))
412 ccw_device_schedule_sch_unregister(cdev); 382 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
413 else 383 else
414 ccw_device_set_disconnected(cdev); 384 ccw_device_set_disconnected(cdev);
415 cdev->private->flags.donotify = 0; 385 cdev->private->flags.donotify = 0;
@@ -425,107 +395,12 @@ ccw_device_done(struct ccw_device *cdev, int state)
425 wake_up(&cdev->private->wait_q); 395 wake_up(&cdev->private->wait_q);
426} 396}
427 397
428static int cmp_pgid(struct pgid *p1, struct pgid *p2)
429{
430 char *c1;
431 char *c2;
432
433 c1 = (char *)p1;
434 c2 = (char *)p2;
435
436 return memcmp(c1 + 1, c2 + 1, sizeof(struct pgid) - 1);
437}
438
439static void __ccw_device_get_common_pgid(struct ccw_device *cdev)
440{
441 int i;
442 int last;
443
444 last = 0;
445 for (i = 0; i < 8; i++) {
446 if (cdev->private->pgid[i].inf.ps.state1 == SNID_STATE1_RESET)
447 /* No PGID yet */
448 continue;
449 if (cdev->private->pgid[last].inf.ps.state1 ==
450 SNID_STATE1_RESET) {
451 /* First non-zero PGID */
452 last = i;
453 continue;
454 }
455 if (cmp_pgid(&cdev->private->pgid[i],
456 &cdev->private->pgid[last]) == 0)
457 /* Non-conflicting PGIDs */
458 continue;
459
460 /* PGID mismatch, can't pathgroup. */
461 CIO_MSG_EVENT(0, "SNID - pgid mismatch for device "
462 "0.%x.%04x, can't pathgroup\n",
463 cdev->private->dev_id.ssid,
464 cdev->private->dev_id.devno);
465 cdev->private->options.pgroup = 0;
466 return;
467 }
468 if (cdev->private->pgid[last].inf.ps.state1 ==
469 SNID_STATE1_RESET)
470 /* No previous pgid found */
471 memcpy(&cdev->private->pgid[0],
472 &channel_subsystems[0]->global_pgid,
473 sizeof(struct pgid));
474 else
475 /* Use existing pgid */
476 memcpy(&cdev->private->pgid[0], &cdev->private->pgid[last],
477 sizeof(struct pgid));
478}
479
480/*
481 * Function called from device_pgid.c after sense path ground has completed.
482 */
483void
484ccw_device_sense_pgid_done(struct ccw_device *cdev, int err)
485{
486 struct subchannel *sch;
487
488 sch = to_subchannel(cdev->dev.parent);
489 switch (err) {
490 case -EOPNOTSUPP: /* path grouping not supported, use nop instead. */
491 cdev->private->options.pgroup = 0;
492 break;
493 case 0: /* success */
494 case -EACCES: /* partial success, some paths not operational */
495 /* Check if all pgids are equal or 0. */
496 __ccw_device_get_common_pgid(cdev);
497 break;
498 case -ETIME: /* Sense path group id stopped by timeout. */
499 case -EUSERS: /* device is reserved for someone else. */
500 ccw_device_done(cdev, DEV_STATE_BOXED);
501 return;
502 default:
503 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
504 return;
505 }
506 /* Start Path Group verification. */
507 cdev->private->state = DEV_STATE_VERIFY;
508 cdev->private->flags.doverify = 0;
509 ccw_device_verify_start(cdev);
510}
511
512/* 398/*
513 * Start device recognition. 399 * Start device recognition.
514 */ 400 */
515int 401void ccw_device_recognition(struct ccw_device *cdev)
516ccw_device_recognition(struct ccw_device *cdev)
517{ 402{
518 struct subchannel *sch; 403 struct subchannel *sch = to_subchannel(cdev->dev.parent);
519 int ret;
520
521 sch = to_subchannel(cdev->dev.parent);
522 ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
523 if (ret != 0)
524 /* Couldn't enable the subchannel for i/o. Sick device. */
525 return ret;
526
527 /* After 60s the device recognition is considered to have failed. */
528 ccw_device_set_timeout(cdev, 60*HZ);
529 404
530 /* 405 /*
531 * We used to start here with a sense pgid to find out whether a device 406 * We used to start here with a sense pgid to find out whether a device
@@ -537,32 +412,33 @@ ccw_device_recognition(struct ccw_device *cdev)
537 */ 412 */
538 cdev->private->flags.recog_done = 0; 413 cdev->private->flags.recog_done = 0;
539 cdev->private->state = DEV_STATE_SENSE_ID; 414 cdev->private->state = DEV_STATE_SENSE_ID;
415 if (cio_enable_subchannel(sch, (u32) (addr_t) sch)) {
416 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
417 return;
418 }
540 ccw_device_sense_id_start(cdev); 419 ccw_device_sense_id_start(cdev);
541 return 0;
542} 420}
543 421
544/* 422/*
545 * Handle timeout in device recognition. 423 * Handle events for states that use the ccw request infrastructure.
546 */ 424 */
547static void 425static void ccw_device_request_event(struct ccw_device *cdev, enum dev_event e)
548ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event)
549{ 426{
550 int ret; 427 switch (e) {
551 428 case DEV_EVENT_NOTOPER:
552 ret = ccw_device_cancel_halt_clear(cdev); 429 ccw_request_notoper(cdev);
553 switch (ret) {
554 case 0:
555 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
556 break; 430 break;
557 case -ENODEV: 431 case DEV_EVENT_INTERRUPT:
558 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); 432 ccw_request_handler(cdev);
433 break;
434 case DEV_EVENT_TIMEOUT:
435 ccw_request_timeout(cdev);
559 break; 436 break;
560 default: 437 default:
561 ccw_device_set_timeout(cdev, 3*HZ); 438 break;
562 } 439 }
563} 440}
564 441
565
566void 442void
567ccw_device_verify_done(struct ccw_device *cdev, int err) 443ccw_device_verify_done(struct ccw_device *cdev, int err)
568{ 444{
@@ -571,21 +447,18 @@ ccw_device_verify_done(struct ccw_device *cdev, int err)
571 sch = to_subchannel(cdev->dev.parent); 447 sch = to_subchannel(cdev->dev.parent);
572 /* Update schib - pom may have changed. */ 448 /* Update schib - pom may have changed. */
573 if (cio_update_schib(sch)) { 449 if (cio_update_schib(sch)) {
574 cdev->private->flags.donotify = 0; 450 err = -ENODEV;
575 ccw_device_done(cdev, DEV_STATE_NOT_OPER); 451 goto callback;
576 return;
577 } 452 }
578 /* Update lpm with verified path mask. */ 453 /* Update lpm with verified path mask. */
579 sch->lpm = sch->vpm; 454 sch->lpm = sch->vpm;
580 /* Repeat path verification? */ 455 /* Repeat path verification? */
581 if (cdev->private->flags.doverify) { 456 if (cdev->private->flags.doverify) {
582 cdev->private->flags.doverify = 0;
583 ccw_device_verify_start(cdev); 457 ccw_device_verify_start(cdev);
584 return; 458 return;
585 } 459 }
460callback:
586 switch (err) { 461 switch (err) {
587 case -EOPNOTSUPP: /* path grouping not supported, just set online. */
588 cdev->private->options.pgroup = 0;
589 case 0: 462 case 0:
590 ccw_device_done(cdev, DEV_STATE_ONLINE); 463 ccw_device_done(cdev, DEV_STATE_ONLINE);
591 /* Deliver fake irb to device driver, if needed. */ 464 /* Deliver fake irb to device driver, if needed. */
@@ -604,18 +477,20 @@ ccw_device_verify_done(struct ccw_device *cdev, int err)
604 } 477 }
605 break; 478 break;
606 case -ETIME: 479 case -ETIME:
480 case -EUSERS:
607 /* Reset oper notify indication after verify error. */ 481 /* Reset oper notify indication after verify error. */
608 cdev->private->flags.donotify = 0; 482 cdev->private->flags.donotify = 0;
609 ccw_device_done(cdev, DEV_STATE_BOXED); 483 ccw_device_done(cdev, DEV_STATE_BOXED);
610 break; 484 break;
485 case -EACCES:
486 /* Reset oper notify indication after verify error. */
487 cdev->private->flags.donotify = 0;
488 ccw_device_done(cdev, DEV_STATE_DISCONNECTED);
489 break;
611 default: 490 default:
612 /* Reset oper notify indication after verify error. */ 491 /* Reset oper notify indication after verify error. */
613 cdev->private->flags.donotify = 0; 492 cdev->private->flags.donotify = 0;
614 if (cdev->online) { 493 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
615 ccw_device_set_timeout(cdev, 0);
616 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
617 } else
618 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
619 break; 494 break;
620 } 495 }
621} 496}
@@ -640,17 +515,9 @@ ccw_device_online(struct ccw_device *cdev)
640 dev_fsm_event(cdev, DEV_EVENT_NOTOPER); 515 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
641 return ret; 516 return ret;
642 } 517 }
643 /* Do we want to do path grouping? */ 518 /* Start initial path verification. */
644 if (!cdev->private->options.pgroup) { 519 cdev->private->state = DEV_STATE_VERIFY;
645 /* Start initial path verification. */ 520 ccw_device_verify_start(cdev);
646 cdev->private->state = DEV_STATE_VERIFY;
647 cdev->private->flags.doverify = 0;
648 ccw_device_verify_start(cdev);
649 return 0;
650 }
651 /* Do a SensePGID first. */
652 cdev->private->state = DEV_STATE_SENSE_PGID;
653 ccw_device_sense_pgid_start(cdev);
654 return 0; 521 return 0;
655} 522}
656 523
@@ -666,7 +533,6 @@ ccw_device_disband_done(struct ccw_device *cdev, int err)
666 break; 533 break;
667 default: 534 default:
668 cdev->private->flags.donotify = 0; 535 cdev->private->flags.donotify = 0;
669 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
670 ccw_device_done(cdev, DEV_STATE_NOT_OPER); 536 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
671 break; 537 break;
672 } 538 }
@@ -703,7 +569,7 @@ ccw_device_offline(struct ccw_device *cdev)
703 if (cdev->private->state != DEV_STATE_ONLINE) 569 if (cdev->private->state != DEV_STATE_ONLINE)
704 return -EINVAL; 570 return -EINVAL;
705 /* Are we doing path grouping? */ 571 /* Are we doing path grouping? */
706 if (!cdev->private->options.pgroup) { 572 if (!cdev->private->flags.pgroup) {
707 /* No, set state offline immediately. */ 573 /* No, set state offline immediately. */
708 ccw_device_done(cdev, DEV_STATE_OFFLINE); 574 ccw_device_done(cdev, DEV_STATE_OFFLINE);
709 return 0; 575 return 0;
@@ -715,43 +581,13 @@ ccw_device_offline(struct ccw_device *cdev)
715} 581}
716 582
717/* 583/*
718 * Handle timeout in device online/offline process.
719 */
720static void
721ccw_device_onoff_timeout(struct ccw_device *cdev, enum dev_event dev_event)
722{
723 int ret;
724
725 ret = ccw_device_cancel_halt_clear(cdev);
726 switch (ret) {
727 case 0:
728 ccw_device_done(cdev, DEV_STATE_BOXED);
729 break;
730 case -ENODEV:
731 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
732 break;
733 default:
734 ccw_device_set_timeout(cdev, 3*HZ);
735 }
736}
737
738/*
739 * Handle not oper event in device recognition.
740 */
741static void
742ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event)
743{
744 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
745}
746
747/*
748 * Handle not operational event in non-special state. 584 * Handle not operational event in non-special state.
749 */ 585 */
750static void ccw_device_generic_notoper(struct ccw_device *cdev, 586static void ccw_device_generic_notoper(struct ccw_device *cdev,
751 enum dev_event dev_event) 587 enum dev_event dev_event)
752{ 588{
753 if (!ccw_device_notify(cdev, CIO_GONE)) 589 if (!ccw_device_notify(cdev, CIO_GONE))
754 ccw_device_schedule_sch_unregister(cdev); 590 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
755 else 591 else
756 ccw_device_set_disconnected(cdev); 592 ccw_device_set_disconnected(cdev);
757} 593}
@@ -802,11 +638,27 @@ ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
802 } 638 }
803 /* Device is idle, we can do the path verification. */ 639 /* Device is idle, we can do the path verification. */
804 cdev->private->state = DEV_STATE_VERIFY; 640 cdev->private->state = DEV_STATE_VERIFY;
805 cdev->private->flags.doverify = 0;
806 ccw_device_verify_start(cdev); 641 ccw_device_verify_start(cdev);
807} 642}
808 643
809/* 644/*
645 * Handle path verification event in boxed state.
646 */
647static void ccw_device_boxed_verify(struct ccw_device *cdev,
648 enum dev_event dev_event)
649{
650 struct subchannel *sch = to_subchannel(cdev->dev.parent);
651
652 if (cdev->online) {
653 if (cio_enable_subchannel(sch, (u32) (addr_t) sch))
654 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
655 else
656 ccw_device_online_verify(cdev, dev_event);
657 } else
658 css_schedule_eval(sch->schid);
659}
660
661/*
810 * Got an interrupt for a normal io (state online). 662 * Got an interrupt for a normal io (state online).
811 */ 663 */
812static void 664static void
@@ -904,12 +756,6 @@ ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
904 */ 756 */
905 if (scsw_fctl(&irb->scsw) & 757 if (scsw_fctl(&irb->scsw) &
906 (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) { 758 (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
907 /* Retry Basic Sense if requested. */
908 if (cdev->private->flags.intretry) {
909 cdev->private->flags.intretry = 0;
910 ccw_device_do_sense(cdev, irb);
911 return;
912 }
913 cdev->private->flags.dosense = 0; 759 cdev->private->flags.dosense = 0;
914 memset(&cdev->private->irb, 0, sizeof(struct irb)); 760 memset(&cdev->private->irb, 0, sizeof(struct irb));
915 ccw_device_accumulate_irb(cdev, irb); 761 ccw_device_accumulate_irb(cdev, irb);
@@ -933,21 +779,6 @@ call_handler:
933} 779}
934 780
935static void 781static void
936ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event)
937{
938 struct irb *irb;
939
940 irb = (struct irb *) __LC_IRB;
941 /* Accumulate status. We don't do basic sense. */
942 ccw_device_accumulate_irb(cdev, irb);
943 /* Remember to clear irb to avoid residuals. */
944 memset(&cdev->private->irb, 0, sizeof(struct irb));
945 /* Try to start delayed device verification. */
946 ccw_device_online_verify(cdev, 0);
947 /* Note: Don't call handler for cio initiated clear! */
948}
949
950static void
951ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event) 782ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
952{ 783{
953 struct subchannel *sch; 784 struct subchannel *sch;
@@ -1004,32 +835,6 @@ ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event)
1004} 835}
1005 836
1006static void 837static void
1007ccw_device_stlck_done(struct ccw_device *cdev, enum dev_event dev_event)
1008{
1009 struct irb *irb;
1010
1011 switch (dev_event) {
1012 case DEV_EVENT_INTERRUPT:
1013 irb = (struct irb *) __LC_IRB;
1014 /* Check for unsolicited interrupt. */
1015 if ((scsw_stctl(&irb->scsw) ==
1016 (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) &&
1017 (!scsw_cc(&irb->scsw)))
1018 /* FIXME: we should restart stlck here, but this
1019 * is extremely unlikely ... */
1020 goto out_wakeup;
1021
1022 ccw_device_accumulate_irb(cdev, irb);
1023 /* We don't care about basic sense etc. */
1024 break;
1025 default: /* timeout */
1026 break;
1027 }
1028out_wakeup:
1029 wake_up(&cdev->private->wait_q);
1030}
1031
1032static void
1033ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event) 838ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
1034{ 839{
1035 struct subchannel *sch; 840 struct subchannel *sch;
@@ -1038,10 +843,6 @@ ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
1038 if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0) 843 if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0)
1039 /* Couldn't enable the subchannel for i/o. Sick device. */ 844 /* Couldn't enable the subchannel for i/o. Sick device. */
1040 return; 845 return;
1041
1042 /* After 60s the device recognition is considered to have failed. */
1043 ccw_device_set_timeout(cdev, 60*HZ);
1044
1045 cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID; 846 cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
1046 ccw_device_sense_id_start(cdev); 847 ccw_device_sense_id_start(cdev);
1047} 848}
@@ -1072,22 +873,20 @@ void ccw_device_trigger_reprobe(struct ccw_device *cdev)
1072 873
1073 /* We should also udate ssd info, but this has to wait. */ 874 /* We should also udate ssd info, but this has to wait. */
1074 /* Check if this is another device which appeared on the same sch. */ 875 /* Check if this is another device which appeared on the same sch. */
1075 if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) { 876 if (sch->schib.pmcw.dev != cdev->private->dev_id.devno)
1076 PREPARE_WORK(&cdev->private->kick_work, 877 css_schedule_eval(sch->schid);
1077 ccw_device_move_to_orphanage); 878 else
1078 queue_work(slow_path_wq, &cdev->private->kick_work);
1079 } else
1080 ccw_device_start_id(cdev, 0); 879 ccw_device_start_id(cdev, 0);
1081} 880}
1082 881
1083static void 882static void ccw_device_disabled_irq(struct ccw_device *cdev,
1084ccw_device_offline_irq(struct ccw_device *cdev, enum dev_event dev_event) 883 enum dev_event dev_event)
1085{ 884{
1086 struct subchannel *sch; 885 struct subchannel *sch;
1087 886
1088 sch = to_subchannel(cdev->dev.parent); 887 sch = to_subchannel(cdev->dev.parent);
1089 /* 888 /*
1090 * An interrupt in state offline means a previous disable was not 889 * An interrupt in a disabled state means a previous disable was not
1091 * successful - should not happen, but we try to disable again. 890 * successful - should not happen, but we try to disable again.
1092 */ 891 */
1093 cio_disable_subchannel(sch); 892 cio_disable_subchannel(sch);
@@ -1113,10 +912,7 @@ static void
1113ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event) 912ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
1114{ 913{
1115 ccw_device_set_timeout(cdev, 0); 914 ccw_device_set_timeout(cdev, 0);
1116 if (dev_event == DEV_EVENT_NOTOPER) 915 cdev->private->state = DEV_STATE_NOT_OPER;
1117 cdev->private->state = DEV_STATE_NOT_OPER;
1118 else
1119 cdev->private->state = DEV_STATE_OFFLINE;
1120 wake_up(&cdev->private->wait_q); 916 wake_up(&cdev->private->wait_q);
1121} 917}
1122 918
@@ -1126,17 +922,11 @@ ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event)
1126 int ret; 922 int ret;
1127 923
1128 ret = ccw_device_cancel_halt_clear(cdev); 924 ret = ccw_device_cancel_halt_clear(cdev);
1129 switch (ret) { 925 if (ret == -EBUSY) {
1130 case 0: 926 ccw_device_set_timeout(cdev, HZ/10);
1131 cdev->private->state = DEV_STATE_OFFLINE; 927 } else {
1132 wake_up(&cdev->private->wait_q);
1133 break;
1134 case -ENODEV:
1135 cdev->private->state = DEV_STATE_NOT_OPER; 928 cdev->private->state = DEV_STATE_NOT_OPER;
1136 wake_up(&cdev->private->wait_q); 929 wake_up(&cdev->private->wait_q);
1137 break;
1138 default:
1139 ccw_device_set_timeout(cdev, HZ/10);
1140 } 930 }
1141} 931}
1142 932
@@ -1150,50 +940,37 @@ ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
1150} 940}
1151 941
1152/* 942/*
1153 * Bug operation action.
1154 */
1155static void
1156ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event)
1157{
1158 CIO_MSG_EVENT(0, "Internal state [%i][%i] not handled for device "
1159 "0.%x.%04x\n", cdev->private->state, dev_event,
1160 cdev->private->dev_id.ssid,
1161 cdev->private->dev_id.devno);
1162 BUG();
1163}
1164
1165/*
1166 * device statemachine 943 * device statemachine
1167 */ 944 */
1168fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = { 945fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1169 [DEV_STATE_NOT_OPER] = { 946 [DEV_STATE_NOT_OPER] = {
1170 [DEV_EVENT_NOTOPER] = ccw_device_nop, 947 [DEV_EVENT_NOTOPER] = ccw_device_nop,
1171 [DEV_EVENT_INTERRUPT] = ccw_device_bug, 948 [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq,
1172 [DEV_EVENT_TIMEOUT] = ccw_device_nop, 949 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1173 [DEV_EVENT_VERIFY] = ccw_device_nop, 950 [DEV_EVENT_VERIFY] = ccw_device_nop,
1174 }, 951 },
1175 [DEV_STATE_SENSE_PGID] = { 952 [DEV_STATE_SENSE_PGID] = {
1176 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, 953 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1177 [DEV_EVENT_INTERRUPT] = ccw_device_sense_pgid_irq, 954 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1178 [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout, 955 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1179 [DEV_EVENT_VERIFY] = ccw_device_nop, 956 [DEV_EVENT_VERIFY] = ccw_device_nop,
1180 }, 957 },
1181 [DEV_STATE_SENSE_ID] = { 958 [DEV_STATE_SENSE_ID] = {
1182 [DEV_EVENT_NOTOPER] = ccw_device_recog_notoper, 959 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1183 [DEV_EVENT_INTERRUPT] = ccw_device_sense_id_irq, 960 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1184 [DEV_EVENT_TIMEOUT] = ccw_device_recog_timeout, 961 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1185 [DEV_EVENT_VERIFY] = ccw_device_nop, 962 [DEV_EVENT_VERIFY] = ccw_device_nop,
1186 }, 963 },
1187 [DEV_STATE_OFFLINE] = { 964 [DEV_STATE_OFFLINE] = {
1188 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, 965 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1189 [DEV_EVENT_INTERRUPT] = ccw_device_offline_irq, 966 [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq,
1190 [DEV_EVENT_TIMEOUT] = ccw_device_nop, 967 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1191 [DEV_EVENT_VERIFY] = ccw_device_offline_verify, 968 [DEV_EVENT_VERIFY] = ccw_device_offline_verify,
1192 }, 969 },
1193 [DEV_STATE_VERIFY] = { 970 [DEV_STATE_VERIFY] = {
1194 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, 971 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1195 [DEV_EVENT_INTERRUPT] = ccw_device_verify_irq, 972 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1196 [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout, 973 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1197 [DEV_EVENT_VERIFY] = ccw_device_delay_verify, 974 [DEV_EVENT_VERIFY] = ccw_device_delay_verify,
1198 }, 975 },
1199 [DEV_STATE_ONLINE] = { 976 [DEV_STATE_ONLINE] = {
@@ -1209,24 +986,18 @@ fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1209 [DEV_EVENT_VERIFY] = ccw_device_online_verify, 986 [DEV_EVENT_VERIFY] = ccw_device_online_verify,
1210 }, 987 },
1211 [DEV_STATE_DISBAND_PGID] = { 988 [DEV_STATE_DISBAND_PGID] = {
1212 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, 989 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1213 [DEV_EVENT_INTERRUPT] = ccw_device_disband_irq, 990 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1214 [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout, 991 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1215 [DEV_EVENT_VERIFY] = ccw_device_nop, 992 [DEV_EVENT_VERIFY] = ccw_device_nop,
1216 }, 993 },
1217 [DEV_STATE_BOXED] = { 994 [DEV_STATE_BOXED] = {
1218 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, 995 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1219 [DEV_EVENT_INTERRUPT] = ccw_device_stlck_done, 996 [DEV_EVENT_INTERRUPT] = ccw_device_nop,
1220 [DEV_EVENT_TIMEOUT] = ccw_device_stlck_done,
1221 [DEV_EVENT_VERIFY] = ccw_device_nop,
1222 },
1223 /* states to wait for i/o completion before doing something */
1224 [DEV_STATE_CLEAR_VERIFY] = {
1225 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1226 [DEV_EVENT_INTERRUPT] = ccw_device_clear_verify,
1227 [DEV_EVENT_TIMEOUT] = ccw_device_nop, 997 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1228 [DEV_EVENT_VERIFY] = ccw_device_nop, 998 [DEV_EVENT_VERIFY] = ccw_device_boxed_verify,
1229 }, 999 },
1000 /* states to wait for i/o completion before doing something */
1230 [DEV_STATE_TIMEOUT_KILL] = { 1001 [DEV_STATE_TIMEOUT_KILL] = {
1231 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper, 1002 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1232 [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq, 1003 [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq,
@@ -1243,13 +1014,13 @@ fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1243 [DEV_STATE_DISCONNECTED] = { 1014 [DEV_STATE_DISCONNECTED] = {
1244 [DEV_EVENT_NOTOPER] = ccw_device_nop, 1015 [DEV_EVENT_NOTOPER] = ccw_device_nop,
1245 [DEV_EVENT_INTERRUPT] = ccw_device_start_id, 1016 [DEV_EVENT_INTERRUPT] = ccw_device_start_id,
1246 [DEV_EVENT_TIMEOUT] = ccw_device_bug, 1017 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1247 [DEV_EVENT_VERIFY] = ccw_device_start_id, 1018 [DEV_EVENT_VERIFY] = ccw_device_start_id,
1248 }, 1019 },
1249 [DEV_STATE_DISCONNECTED_SENSE_ID] = { 1020 [DEV_STATE_DISCONNECTED_SENSE_ID] = {
1250 [DEV_EVENT_NOTOPER] = ccw_device_recog_notoper, 1021 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1251 [DEV_EVENT_INTERRUPT] = ccw_device_sense_id_irq, 1022 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1252 [DEV_EVENT_TIMEOUT] = ccw_device_recog_timeout, 1023 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1253 [DEV_EVENT_VERIFY] = ccw_device_nop, 1024 [DEV_EVENT_VERIFY] = ccw_device_nop,
1254 }, 1025 },
1255 [DEV_STATE_CMFCHANGE] = { 1026 [DEV_STATE_CMFCHANGE] = {
@@ -1264,6 +1035,12 @@ fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1264 [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock, 1035 [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock,
1265 [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock, 1036 [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock,
1266 }, 1037 },
1038 [DEV_STATE_STEAL_LOCK] = {
1039 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1040 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1041 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1042 [DEV_EVENT_VERIFY] = ccw_device_nop,
1043 },
1267}; 1044};
1268 1045
1269EXPORT_SYMBOL_GPL(ccw_device_set_timeout); 1046EXPORT_SYMBOL_GPL(ccw_device_set_timeout);