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Merge remote-tracking branch 'asoc/fix/pcm1681' into asoc-linus
[deliverable/linux.git] / drivers / s390 / block / dasd_3990_erp.c
1 /*
2 * Author(s)......: Horst Hummel <Horst.Hummel@de.ibm.com>
3 * Holger Smolinski <Holger.Smolinski@de.ibm.com>
4 * Bugreports.to..: <Linux390@de.ibm.com>
5 * Copyright IBM Corp. 2000, 2001
6 *
7 */
8
9 #define KMSG_COMPONENT "dasd-eckd"
10
11 #include <linux/timer.h>
12 #include <asm/idals.h>
13
14 #define PRINTK_HEADER "dasd_erp(3990): "
15
16 #include "dasd_int.h"
17 #include "dasd_eckd.h"
18
19
20 struct DCTL_data {
21 unsigned char subcommand; /* e.g Inhibit Write, Enable Write,... */
22 unsigned char modifier; /* Subcommand modifier */
23 unsigned short res; /* reserved */
24 } __attribute__ ((packed));
25
26 /*
27 *****************************************************************************
28 * SECTION ERP HANDLING
29 *****************************************************************************
30 */
31 /*
32 *****************************************************************************
33 * 24 and 32 byte sense ERP functions
34 *****************************************************************************
35 */
36
37 /*
38 * DASD_3990_ERP_CLEANUP
39 *
40 * DESCRIPTION
41 * Removes the already build but not necessary ERP request and sets
42 * the status of the original cqr / erp to the given (final) status
43 *
44 * PARAMETER
45 * erp request to be blocked
46 * final_status either DASD_CQR_DONE or DASD_CQR_FAILED
47 *
48 * RETURN VALUES
49 * cqr original cqr
50 */
51 static struct dasd_ccw_req *
52 dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status)
53 {
54 struct dasd_ccw_req *cqr = erp->refers;
55
56 dasd_free_erp_request(erp, erp->memdev);
57 cqr->status = final_status;
58 return cqr;
59
60 } /* end dasd_3990_erp_cleanup */
61
62 /*
63 * DASD_3990_ERP_BLOCK_QUEUE
64 *
65 * DESCRIPTION
66 * Block the given device request queue to prevent from further
67 * processing until the started timer has expired or an related
68 * interrupt was received.
69 */
70 static void dasd_3990_erp_block_queue(struct dasd_ccw_req *erp, int expires)
71 {
72
73 struct dasd_device *device = erp->startdev;
74 unsigned long flags;
75
76 DBF_DEV_EVENT(DBF_INFO, device,
77 "blocking request queue for %is", expires/HZ);
78
79 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
80 dasd_device_set_stop_bits(device, DASD_STOPPED_PENDING);
81 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
82 erp->status = DASD_CQR_FILLED;
83 if (erp->block)
84 dasd_block_set_timer(erp->block, expires);
85 else
86 dasd_device_set_timer(device, expires);
87 }
88
89 /*
90 * DASD_3990_ERP_INT_REQ
91 *
92 * DESCRIPTION
93 * Handles 'Intervention Required' error.
94 * This means either device offline or not installed.
95 *
96 * PARAMETER
97 * erp current erp
98 * RETURN VALUES
99 * erp modified erp
100 */
101 static struct dasd_ccw_req *
102 dasd_3990_erp_int_req(struct dasd_ccw_req * erp)
103 {
104
105 struct dasd_device *device = erp->startdev;
106
107 /* first time set initial retry counter and erp_function */
108 /* and retry once without blocking queue */
109 /* (this enables easier enqueing of the cqr) */
110 if (erp->function != dasd_3990_erp_int_req) {
111
112 erp->retries = 256;
113 erp->function = dasd_3990_erp_int_req;
114
115 } else {
116
117 /* issue a message and wait for 'device ready' interrupt */
118 dev_err(&device->cdev->dev,
119 "is offline or not installed - "
120 "INTERVENTION REQUIRED!!\n");
121
122 dasd_3990_erp_block_queue(erp, 60*HZ);
123 }
124
125 return erp;
126
127 } /* end dasd_3990_erp_int_req */
128
129 /*
130 * DASD_3990_ERP_ALTERNATE_PATH
131 *
132 * DESCRIPTION
133 * Repeat the operation on a different channel path.
134 * If all alternate paths have been tried, the request is posted with a
135 * permanent error.
136 *
137 * PARAMETER
138 * erp pointer to the current ERP
139 *
140 * RETURN VALUES
141 * erp modified pointer to the ERP
142 */
143 static void
144 dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp)
145 {
146 struct dasd_device *device = erp->startdev;
147 __u8 opm;
148 unsigned long flags;
149
150 /* try alternate valid path */
151 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
152 opm = ccw_device_get_path_mask(device->cdev);
153 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
154 if (erp->lpm == 0)
155 erp->lpm = device->path_data.opm &
156 ~(erp->irb.esw.esw0.sublog.lpum);
157 else
158 erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum);
159
160 if ((erp->lpm & opm) != 0x00) {
161
162 DBF_DEV_EVENT(DBF_WARNING, device,
163 "try alternate lpm=%x (lpum=%x / opm=%x)",
164 erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm);
165
166 /* reset status to submit the request again... */
167 erp->status = DASD_CQR_FILLED;
168 erp->retries = 10;
169 } else {
170 dev_err(&device->cdev->dev,
171 "The DASD cannot be reached on any path (lpum=%x"
172 "/opm=%x)\n", erp->irb.esw.esw0.sublog.lpum, opm);
173
174 /* post request with permanent error */
175 erp->status = DASD_CQR_FAILED;
176 }
177 } /* end dasd_3990_erp_alternate_path */
178
179 /*
180 * DASD_3990_ERP_DCTL
181 *
182 * DESCRIPTION
183 * Setup cqr to do the Diagnostic Control (DCTL) command with an
184 * Inhibit Write subcommand (0x20) and the given modifier.
185 *
186 * PARAMETER
187 * erp pointer to the current (failed) ERP
188 * modifier subcommand modifier
189 *
190 * RETURN VALUES
191 * dctl_cqr pointer to NEW dctl_cqr
192 *
193 */
194 static struct dasd_ccw_req *
195 dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier)
196 {
197
198 struct dasd_device *device = erp->startdev;
199 struct DCTL_data *DCTL_data;
200 struct ccw1 *ccw;
201 struct dasd_ccw_req *dctl_cqr;
202
203 dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1,
204 sizeof(struct DCTL_data),
205 device);
206 if (IS_ERR(dctl_cqr)) {
207 dev_err(&device->cdev->dev,
208 "Unable to allocate DCTL-CQR\n");
209 erp->status = DASD_CQR_FAILED;
210 return erp;
211 }
212
213 DCTL_data = dctl_cqr->data;
214
215 DCTL_data->subcommand = 0x02; /* Inhibit Write */
216 DCTL_data->modifier = modifier;
217
218 ccw = dctl_cqr->cpaddr;
219 memset(ccw, 0, sizeof(struct ccw1));
220 ccw->cmd_code = CCW_CMD_DCTL;
221 ccw->count = 4;
222 ccw->cda = (__u32)(addr_t) DCTL_data;
223 dctl_cqr->flags = erp->flags;
224 dctl_cqr->function = dasd_3990_erp_DCTL;
225 dctl_cqr->refers = erp;
226 dctl_cqr->startdev = device;
227 dctl_cqr->memdev = device;
228 dctl_cqr->magic = erp->magic;
229 dctl_cqr->expires = 5 * 60 * HZ;
230 dctl_cqr->retries = 2;
231
232 dctl_cqr->buildclk = get_tod_clock();
233
234 dctl_cqr->status = DASD_CQR_FILLED;
235
236 return dctl_cqr;
237
238 } /* end dasd_3990_erp_DCTL */
239
240 /*
241 * DASD_3990_ERP_ACTION_1
242 *
243 * DESCRIPTION
244 * Setup ERP to do the ERP action 1 (see Reference manual).
245 * Repeat the operation on a different channel path.
246 * As deviation from the recommended recovery action, we reset the path mask
247 * after we have tried each path and go through all paths a second time.
248 * This will cover situations where only one path at a time is actually down,
249 * but all paths fail and recover just with the same sequence and timing as
250 * we try to use them (flapping links).
251 * If all alternate paths have been tried twice, the request is posted with
252 * a permanent error.
253 *
254 * PARAMETER
255 * erp pointer to the current ERP
256 *
257 * RETURN VALUES
258 * erp pointer to the ERP
259 *
260 */
261 static struct dasd_ccw_req *dasd_3990_erp_action_1_sec(struct dasd_ccw_req *erp)
262 {
263 erp->function = dasd_3990_erp_action_1_sec;
264 dasd_3990_erp_alternate_path(erp);
265 return erp;
266 }
267
268 static struct dasd_ccw_req *dasd_3990_erp_action_1(struct dasd_ccw_req *erp)
269 {
270 erp->function = dasd_3990_erp_action_1;
271 dasd_3990_erp_alternate_path(erp);
272 if (erp->status == DASD_CQR_FAILED &&
273 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
274 erp->status = DASD_CQR_FILLED;
275 erp->retries = 10;
276 erp->lpm = erp->startdev->path_data.opm;
277 erp->function = dasd_3990_erp_action_1_sec;
278 }
279 return erp;
280 } /* end dasd_3990_erp_action_1(b) */
281
282 /*
283 * DASD_3990_ERP_ACTION_4
284 *
285 * DESCRIPTION
286 * Setup ERP to do the ERP action 4 (see Reference manual).
287 * Set the current request to PENDING to block the CQR queue for that device
288 * until the state change interrupt appears.
289 * Use a timer (20 seconds) to retry the cqr if the interrupt is still
290 * missing.
291 *
292 * PARAMETER
293 * sense sense data of the actual error
294 * erp pointer to the current ERP
295 *
296 * RETURN VALUES
297 * erp pointer to the ERP
298 *
299 */
300 static struct dasd_ccw_req *
301 dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense)
302 {
303
304 struct dasd_device *device = erp->startdev;
305
306 /* first time set initial retry counter and erp_function */
307 /* and retry once without waiting for state change pending */
308 /* interrupt (this enables easier enqueing of the cqr) */
309 if (erp->function != dasd_3990_erp_action_4) {
310
311 DBF_DEV_EVENT(DBF_INFO, device, "%s",
312 "dasd_3990_erp_action_4: first time retry");
313
314 erp->retries = 256;
315 erp->function = dasd_3990_erp_action_4;
316
317 } else {
318 if (sense && (sense[25] == 0x1D)) { /* state change pending */
319
320 DBF_DEV_EVENT(DBF_INFO, device,
321 "waiting for state change pending "
322 "interrupt, %d retries left",
323 erp->retries);
324
325 dasd_3990_erp_block_queue(erp, 30*HZ);
326
327 } else if (sense && (sense[25] == 0x1E)) { /* busy */
328 DBF_DEV_EVENT(DBF_INFO, device,
329 "busy - redriving request later, "
330 "%d retries left",
331 erp->retries);
332 dasd_3990_erp_block_queue(erp, HZ);
333 } else {
334 /* no state change pending - retry */
335 DBF_DEV_EVENT(DBF_INFO, device,
336 "redriving request immediately, "
337 "%d retries left",
338 erp->retries);
339 erp->status = DASD_CQR_FILLED;
340 }
341 }
342
343 return erp;
344
345 } /* end dasd_3990_erp_action_4 */
346
347 /*
348 *****************************************************************************
349 * 24 byte sense ERP functions (only)
350 *****************************************************************************
351 */
352
353 /*
354 * DASD_3990_ERP_ACTION_5
355 *
356 * DESCRIPTION
357 * Setup ERP to do the ERP action 5 (see Reference manual).
358 * NOTE: Further handling is done in xxx_further_erp after the retries.
359 *
360 * PARAMETER
361 * erp pointer to the current ERP
362 *
363 * RETURN VALUES
364 * erp pointer to the ERP
365 *
366 */
367 static struct dasd_ccw_req *
368 dasd_3990_erp_action_5(struct dasd_ccw_req * erp)
369 {
370
371 /* first of all retry */
372 erp->retries = 10;
373 erp->function = dasd_3990_erp_action_5;
374
375 return erp;
376
377 } /* end dasd_3990_erp_action_5 */
378
379 /*
380 * DASD_3990_HANDLE_ENV_DATA
381 *
382 * DESCRIPTION
383 * Handles 24 byte 'Environmental data present'.
384 * Does a analysis of the sense data (message Format)
385 * and prints the error messages.
386 *
387 * PARAMETER
388 * sense current sense data
389 *
390 * RETURN VALUES
391 * void
392 */
393 static void
394 dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense)
395 {
396
397 struct dasd_device *device = erp->startdev;
398 char msg_format = (sense[7] & 0xF0);
399 char msg_no = (sense[7] & 0x0F);
400 char errorstring[ERRORLENGTH];
401
402 switch (msg_format) {
403 case 0x00: /* Format 0 - Program or System Checks */
404
405 if (sense[1] & 0x10) { /* check message to operator bit */
406
407 switch (msg_no) {
408 case 0x00: /* No Message */
409 break;
410 case 0x01:
411 dev_warn(&device->cdev->dev,
412 "FORMAT 0 - Invalid Command\n");
413 break;
414 case 0x02:
415 dev_warn(&device->cdev->dev,
416 "FORMAT 0 - Invalid Command "
417 "Sequence\n");
418 break;
419 case 0x03:
420 dev_warn(&device->cdev->dev,
421 "FORMAT 0 - CCW Count less than "
422 "required\n");
423 break;
424 case 0x04:
425 dev_warn(&device->cdev->dev,
426 "FORMAT 0 - Invalid Parameter\n");
427 break;
428 case 0x05:
429 dev_warn(&device->cdev->dev,
430 "FORMAT 0 - Diagnostic of Special"
431 " Command Violates File Mask\n");
432 break;
433 case 0x07:
434 dev_warn(&device->cdev->dev,
435 "FORMAT 0 - Channel Returned with "
436 "Incorrect retry CCW\n");
437 break;
438 case 0x08:
439 dev_warn(&device->cdev->dev,
440 "FORMAT 0 - Reset Notification\n");
441 break;
442 case 0x09:
443 dev_warn(&device->cdev->dev,
444 "FORMAT 0 - Storage Path Restart\n");
445 break;
446 case 0x0A:
447 dev_warn(&device->cdev->dev,
448 "FORMAT 0 - Channel requested "
449 "... %02x\n", sense[8]);
450 break;
451 case 0x0B:
452 dev_warn(&device->cdev->dev,
453 "FORMAT 0 - Invalid Defective/"
454 "Alternate Track Pointer\n");
455 break;
456 case 0x0C:
457 dev_warn(&device->cdev->dev,
458 "FORMAT 0 - DPS Installation "
459 "Check\n");
460 break;
461 case 0x0E:
462 dev_warn(&device->cdev->dev,
463 "FORMAT 0 - Command Invalid on "
464 "Secondary Address\n");
465 break;
466 case 0x0F:
467 dev_warn(&device->cdev->dev,
468 "FORMAT 0 - Status Not As "
469 "Required: reason %02x\n",
470 sense[8]);
471 break;
472 default:
473 dev_warn(&device->cdev->dev,
474 "FORMAT 0 - Reserved\n");
475 }
476 } else {
477 switch (msg_no) {
478 case 0x00: /* No Message */
479 break;
480 case 0x01:
481 dev_warn(&device->cdev->dev,
482 "FORMAT 0 - Device Error "
483 "Source\n");
484 break;
485 case 0x02:
486 dev_warn(&device->cdev->dev,
487 "FORMAT 0 - Reserved\n");
488 break;
489 case 0x03:
490 dev_warn(&device->cdev->dev,
491 "FORMAT 0 - Device Fenced - "
492 "device = %02x\n", sense[4]);
493 break;
494 case 0x04:
495 dev_warn(&device->cdev->dev,
496 "FORMAT 0 - Data Pinned for "
497 "Device\n");
498 break;
499 default:
500 dev_warn(&device->cdev->dev,
501 "FORMAT 0 - Reserved\n");
502 }
503 }
504 break;
505
506 case 0x10: /* Format 1 - Device Equipment Checks */
507 switch (msg_no) {
508 case 0x00: /* No Message */
509 break;
510 case 0x01:
511 dev_warn(&device->cdev->dev,
512 "FORMAT 1 - Device Status 1 not as "
513 "expected\n");
514 break;
515 case 0x03:
516 dev_warn(&device->cdev->dev,
517 "FORMAT 1 - Index missing\n");
518 break;
519 case 0x04:
520 dev_warn(&device->cdev->dev,
521 "FORMAT 1 - Interruption cannot be "
522 "reset\n");
523 break;
524 case 0x05:
525 dev_warn(&device->cdev->dev,
526 "FORMAT 1 - Device did not respond to "
527 "selection\n");
528 break;
529 case 0x06:
530 dev_warn(&device->cdev->dev,
531 "FORMAT 1 - Device check-2 error or Set "
532 "Sector is not complete\n");
533 break;
534 case 0x07:
535 dev_warn(&device->cdev->dev,
536 "FORMAT 1 - Head address does not "
537 "compare\n");
538 break;
539 case 0x08:
540 dev_warn(&device->cdev->dev,
541 "FORMAT 1 - Device status 1 not valid\n");
542 break;
543 case 0x09:
544 dev_warn(&device->cdev->dev,
545 "FORMAT 1 - Device not ready\n");
546 break;
547 case 0x0A:
548 dev_warn(&device->cdev->dev,
549 "FORMAT 1 - Track physical address did "
550 "not compare\n");
551 break;
552 case 0x0B:
553 dev_warn(&device->cdev->dev,
554 "FORMAT 1 - Missing device address bit\n");
555 break;
556 case 0x0C:
557 dev_warn(&device->cdev->dev,
558 "FORMAT 1 - Drive motor switch is off\n");
559 break;
560 case 0x0D:
561 dev_warn(&device->cdev->dev,
562 "FORMAT 1 - Seek incomplete\n");
563 break;
564 case 0x0E:
565 dev_warn(&device->cdev->dev,
566 "FORMAT 1 - Cylinder address did not "
567 "compare\n");
568 break;
569 case 0x0F:
570 dev_warn(&device->cdev->dev,
571 "FORMAT 1 - Offset active cannot be "
572 "reset\n");
573 break;
574 default:
575 dev_warn(&device->cdev->dev,
576 "FORMAT 1 - Reserved\n");
577 }
578 break;
579
580 case 0x20: /* Format 2 - 3990 Equipment Checks */
581 switch (msg_no) {
582 case 0x08:
583 dev_warn(&device->cdev->dev,
584 "FORMAT 2 - 3990 check-2 error\n");
585 break;
586 case 0x0E:
587 dev_warn(&device->cdev->dev,
588 "FORMAT 2 - Support facility errors\n");
589 break;
590 case 0x0F:
591 dev_warn(&device->cdev->dev,
592 "FORMAT 2 - Microcode detected error "
593 "%02x\n",
594 sense[8]);
595 break;
596 default:
597 dev_warn(&device->cdev->dev,
598 "FORMAT 2 - Reserved\n");
599 }
600 break;
601
602 case 0x30: /* Format 3 - 3990 Control Checks */
603 switch (msg_no) {
604 case 0x0F:
605 dev_warn(&device->cdev->dev,
606 "FORMAT 3 - Allegiance terminated\n");
607 break;
608 default:
609 dev_warn(&device->cdev->dev,
610 "FORMAT 3 - Reserved\n");
611 }
612 break;
613
614 case 0x40: /* Format 4 - Data Checks */
615 switch (msg_no) {
616 case 0x00:
617 dev_warn(&device->cdev->dev,
618 "FORMAT 4 - Home address area error\n");
619 break;
620 case 0x01:
621 dev_warn(&device->cdev->dev,
622 "FORMAT 4 - Count area error\n");
623 break;
624 case 0x02:
625 dev_warn(&device->cdev->dev,
626 "FORMAT 4 - Key area error\n");
627 break;
628 case 0x03:
629 dev_warn(&device->cdev->dev,
630 "FORMAT 4 - Data area error\n");
631 break;
632 case 0x04:
633 dev_warn(&device->cdev->dev,
634 "FORMAT 4 - No sync byte in home address "
635 "area\n");
636 break;
637 case 0x05:
638 dev_warn(&device->cdev->dev,
639 "FORMAT 4 - No sync byte in count address "
640 "area\n");
641 break;
642 case 0x06:
643 dev_warn(&device->cdev->dev,
644 "FORMAT 4 - No sync byte in key area\n");
645 break;
646 case 0x07:
647 dev_warn(&device->cdev->dev,
648 "FORMAT 4 - No sync byte in data area\n");
649 break;
650 case 0x08:
651 dev_warn(&device->cdev->dev,
652 "FORMAT 4 - Home address area error; "
653 "offset active\n");
654 break;
655 case 0x09:
656 dev_warn(&device->cdev->dev,
657 "FORMAT 4 - Count area error; offset "
658 "active\n");
659 break;
660 case 0x0A:
661 dev_warn(&device->cdev->dev,
662 "FORMAT 4 - Key area error; offset "
663 "active\n");
664 break;
665 case 0x0B:
666 dev_warn(&device->cdev->dev,
667 "FORMAT 4 - Data area error; "
668 "offset active\n");
669 break;
670 case 0x0C:
671 dev_warn(&device->cdev->dev,
672 "FORMAT 4 - No sync byte in home "
673 "address area; offset active\n");
674 break;
675 case 0x0D:
676 dev_warn(&device->cdev->dev,
677 "FORMAT 4 - No syn byte in count "
678 "address area; offset active\n");
679 break;
680 case 0x0E:
681 dev_warn(&device->cdev->dev,
682 "FORMAT 4 - No sync byte in key area; "
683 "offset active\n");
684 break;
685 case 0x0F:
686 dev_warn(&device->cdev->dev,
687 "FORMAT 4 - No syn byte in data area; "
688 "offset active\n");
689 break;
690 default:
691 dev_warn(&device->cdev->dev,
692 "FORMAT 4 - Reserved\n");
693 }
694 break;
695
696 case 0x50: /* Format 5 - Data Check with displacement information */
697 switch (msg_no) {
698 case 0x00:
699 dev_warn(&device->cdev->dev,
700 "FORMAT 5 - Data Check in the "
701 "home address area\n");
702 break;
703 case 0x01:
704 dev_warn(&device->cdev->dev,
705 "FORMAT 5 - Data Check in the count "
706 "area\n");
707 break;
708 case 0x02:
709 dev_warn(&device->cdev->dev,
710 "FORMAT 5 - Data Check in the key area\n");
711 break;
712 case 0x03:
713 dev_warn(&device->cdev->dev,
714 "FORMAT 5 - Data Check in the data "
715 "area\n");
716 break;
717 case 0x08:
718 dev_warn(&device->cdev->dev,
719 "FORMAT 5 - Data Check in the "
720 "home address area; offset active\n");
721 break;
722 case 0x09:
723 dev_warn(&device->cdev->dev,
724 "FORMAT 5 - Data Check in the count area; "
725 "offset active\n");
726 break;
727 case 0x0A:
728 dev_warn(&device->cdev->dev,
729 "FORMAT 5 - Data Check in the key area; "
730 "offset active\n");
731 break;
732 case 0x0B:
733 dev_warn(&device->cdev->dev,
734 "FORMAT 5 - Data Check in the data area; "
735 "offset active\n");
736 break;
737 default:
738 dev_warn(&device->cdev->dev,
739 "FORMAT 5 - Reserved\n");
740 }
741 break;
742
743 case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */
744 switch (msg_no) {
745 case 0x00:
746 dev_warn(&device->cdev->dev,
747 "FORMAT 6 - Overrun on channel A\n");
748 break;
749 case 0x01:
750 dev_warn(&device->cdev->dev,
751 "FORMAT 6 - Overrun on channel B\n");
752 break;
753 case 0x02:
754 dev_warn(&device->cdev->dev,
755 "FORMAT 6 - Overrun on channel C\n");
756 break;
757 case 0x03:
758 dev_warn(&device->cdev->dev,
759 "FORMAT 6 - Overrun on channel D\n");
760 break;
761 case 0x04:
762 dev_warn(&device->cdev->dev,
763 "FORMAT 6 - Overrun on channel E\n");
764 break;
765 case 0x05:
766 dev_warn(&device->cdev->dev,
767 "FORMAT 6 - Overrun on channel F\n");
768 break;
769 case 0x06:
770 dev_warn(&device->cdev->dev,
771 "FORMAT 6 - Overrun on channel G\n");
772 break;
773 case 0x07:
774 dev_warn(&device->cdev->dev,
775 "FORMAT 6 - Overrun on channel H\n");
776 break;
777 default:
778 dev_warn(&device->cdev->dev,
779 "FORMAT 6 - Reserved\n");
780 }
781 break;
782
783 case 0x70: /* Format 7 - Device Connection Control Checks */
784 switch (msg_no) {
785 case 0x00:
786 dev_warn(&device->cdev->dev,
787 "FORMAT 7 - RCC initiated by a connection "
788 "check alert\n");
789 break;
790 case 0x01:
791 dev_warn(&device->cdev->dev,
792 "FORMAT 7 - RCC 1 sequence not "
793 "successful\n");
794 break;
795 case 0x02:
796 dev_warn(&device->cdev->dev,
797 "FORMAT 7 - RCC 1 and RCC 2 sequences not "
798 "successful\n");
799 break;
800 case 0x03:
801 dev_warn(&device->cdev->dev,
802 "FORMAT 7 - Invalid tag-in during "
803 "selection sequence\n");
804 break;
805 case 0x04:
806 dev_warn(&device->cdev->dev,
807 "FORMAT 7 - extra RCC required\n");
808 break;
809 case 0x05:
810 dev_warn(&device->cdev->dev,
811 "FORMAT 7 - Invalid DCC selection "
812 "response or timeout\n");
813 break;
814 case 0x06:
815 dev_warn(&device->cdev->dev,
816 "FORMAT 7 - Missing end operation; device "
817 "transfer complete\n");
818 break;
819 case 0x07:
820 dev_warn(&device->cdev->dev,
821 "FORMAT 7 - Missing end operation; device "
822 "transfer incomplete\n");
823 break;
824 case 0x08:
825 dev_warn(&device->cdev->dev,
826 "FORMAT 7 - Invalid tag-in for an "
827 "immediate command sequence\n");
828 break;
829 case 0x09:
830 dev_warn(&device->cdev->dev,
831 "FORMAT 7 - Invalid tag-in for an "
832 "extended command sequence\n");
833 break;
834 case 0x0A:
835 dev_warn(&device->cdev->dev,
836 "FORMAT 7 - 3990 microcode time out when "
837 "stopping selection\n");
838 break;
839 case 0x0B:
840 dev_warn(&device->cdev->dev,
841 "FORMAT 7 - No response to selection "
842 "after a poll interruption\n");
843 break;
844 case 0x0C:
845 dev_warn(&device->cdev->dev,
846 "FORMAT 7 - Permanent path error (DASD "
847 "controller not available)\n");
848 break;
849 case 0x0D:
850 dev_warn(&device->cdev->dev,
851 "FORMAT 7 - DASD controller not available"
852 " on disconnected command chain\n");
853 break;
854 default:
855 dev_warn(&device->cdev->dev,
856 "FORMAT 7 - Reserved\n");
857 }
858 break;
859
860 case 0x80: /* Format 8 - Additional Device Equipment Checks */
861 switch (msg_no) {
862 case 0x00: /* No Message */
863 case 0x01:
864 dev_warn(&device->cdev->dev,
865 "FORMAT 8 - Error correction code "
866 "hardware fault\n");
867 break;
868 case 0x03:
869 dev_warn(&device->cdev->dev,
870 "FORMAT 8 - Unexpected end operation "
871 "response code\n");
872 break;
873 case 0x04:
874 dev_warn(&device->cdev->dev,
875 "FORMAT 8 - End operation with transfer "
876 "count not zero\n");
877 break;
878 case 0x05:
879 dev_warn(&device->cdev->dev,
880 "FORMAT 8 - End operation with transfer "
881 "count zero\n");
882 break;
883 case 0x06:
884 dev_warn(&device->cdev->dev,
885 "FORMAT 8 - DPS checks after a system "
886 "reset or selective reset\n");
887 break;
888 case 0x07:
889 dev_warn(&device->cdev->dev,
890 "FORMAT 8 - DPS cannot be filled\n");
891 break;
892 case 0x08:
893 dev_warn(&device->cdev->dev,
894 "FORMAT 8 - Short busy time-out during "
895 "device selection\n");
896 break;
897 case 0x09:
898 dev_warn(&device->cdev->dev,
899 "FORMAT 8 - DASD controller failed to "
900 "set or reset the long busy latch\n");
901 break;
902 case 0x0A:
903 dev_warn(&device->cdev->dev,
904 "FORMAT 8 - No interruption from device "
905 "during a command chain\n");
906 break;
907 default:
908 dev_warn(&device->cdev->dev,
909 "FORMAT 8 - Reserved\n");
910 }
911 break;
912
913 case 0x90: /* Format 9 - Device Read, Write, and Seek Checks */
914 switch (msg_no) {
915 case 0x00:
916 break; /* No Message */
917 case 0x06:
918 dev_warn(&device->cdev->dev,
919 "FORMAT 9 - Device check-2 error\n");
920 break;
921 case 0x07:
922 dev_warn(&device->cdev->dev,
923 "FORMAT 9 - Head address did not "
924 "compare\n");
925 break;
926 case 0x0A:
927 dev_warn(&device->cdev->dev,
928 "FORMAT 9 - Track physical address did "
929 "not compare while oriented\n");
930 break;
931 case 0x0E:
932 dev_warn(&device->cdev->dev,
933 "FORMAT 9 - Cylinder address did not "
934 "compare\n");
935 break;
936 default:
937 dev_warn(&device->cdev->dev,
938 "FORMAT 9 - Reserved\n");
939 }
940 break;
941
942 case 0xF0: /* Format F - Cache Storage Checks */
943 switch (msg_no) {
944 case 0x00:
945 dev_warn(&device->cdev->dev,
946 "FORMAT F - Operation Terminated\n");
947 break;
948 case 0x01:
949 dev_warn(&device->cdev->dev,
950 "FORMAT F - Subsystem Processing Error\n");
951 break;
952 case 0x02:
953 dev_warn(&device->cdev->dev,
954 "FORMAT F - Cache or nonvolatile storage "
955 "equipment failure\n");
956 break;
957 case 0x04:
958 dev_warn(&device->cdev->dev,
959 "FORMAT F - Caching terminated\n");
960 break;
961 case 0x06:
962 dev_warn(&device->cdev->dev,
963 "FORMAT F - Cache fast write access not "
964 "authorized\n");
965 break;
966 case 0x07:
967 dev_warn(&device->cdev->dev,
968 "FORMAT F - Track format incorrect\n");
969 break;
970 case 0x09:
971 dev_warn(&device->cdev->dev,
972 "FORMAT F - Caching reinitiated\n");
973 break;
974 case 0x0A:
975 dev_warn(&device->cdev->dev,
976 "FORMAT F - Nonvolatile storage "
977 "terminated\n");
978 break;
979 case 0x0B:
980 dev_warn(&device->cdev->dev,
981 "FORMAT F - Volume is suspended duplex\n");
982 /* call extended error reporting (EER) */
983 dasd_eer_write(device, erp->refers,
984 DASD_EER_PPRCSUSPEND);
985 break;
986 case 0x0C:
987 dev_warn(&device->cdev->dev,
988 "FORMAT F - Subsystem status cannot be "
989 "determined\n");
990 break;
991 case 0x0D:
992 dev_warn(&device->cdev->dev,
993 "FORMAT F - Caching status reset to "
994 "default\n");
995 break;
996 case 0x0E:
997 dev_warn(&device->cdev->dev,
998 "FORMAT F - DASD Fast Write inhibited\n");
999 break;
1000 default:
1001 dev_warn(&device->cdev->dev,
1002 "FORMAT D - Reserved\n");
1003 }
1004 break;
1005
1006 default: /* unknown message format - should not happen
1007 internal error 03 - unknown message format */
1008 snprintf(errorstring, ERRORLENGTH, "03 %x02", msg_format);
1009 dev_err(&device->cdev->dev,
1010 "An error occurred in the DASD device driver, "
1011 "reason=%s\n", errorstring);
1012 break;
1013 } /* end switch message format */
1014
1015 } /* end dasd_3990_handle_env_data */
1016
1017 /*
1018 * DASD_3990_ERP_COM_REJ
1019 *
1020 * DESCRIPTION
1021 * Handles 24 byte 'Command Reject' error.
1022 *
1023 * PARAMETER
1024 * erp current erp_head
1025 * sense current sense data
1026 *
1027 * RETURN VALUES
1028 * erp 'new' erp_head - pointer to new ERP
1029 */
1030 static struct dasd_ccw_req *
1031 dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense)
1032 {
1033
1034 struct dasd_device *device = erp->startdev;
1035
1036 erp->function = dasd_3990_erp_com_rej;
1037
1038 /* env data present (ACTION 10 - retry should work) */
1039 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1040
1041 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1042 "Command Reject - environmental data present");
1043
1044 dasd_3990_handle_env_data(erp, sense);
1045
1046 erp->retries = 5;
1047
1048 } else if (sense[1] & SNS1_WRITE_INHIBITED) {
1049 dev_err(&device->cdev->dev, "An I/O request was rejected"
1050 " because writing is inhibited\n");
1051 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1052 } else {
1053 /* fatal error - set status to FAILED
1054 internal error 09 - Command Reject */
1055 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1056 "device driver, reason=%s\n", "09");
1057
1058 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1059 }
1060
1061 return erp;
1062
1063 } /* end dasd_3990_erp_com_rej */
1064
1065 /*
1066 * DASD_3990_ERP_BUS_OUT
1067 *
1068 * DESCRIPTION
1069 * Handles 24 byte 'Bus Out Parity Check' error.
1070 *
1071 * PARAMETER
1072 * erp current erp_head
1073 * RETURN VALUES
1074 * erp new erp_head - pointer to new ERP
1075 */
1076 static struct dasd_ccw_req *
1077 dasd_3990_erp_bus_out(struct dasd_ccw_req * erp)
1078 {
1079
1080 struct dasd_device *device = erp->startdev;
1081
1082 /* first time set initial retry counter and erp_function */
1083 /* and retry once without blocking queue */
1084 /* (this enables easier enqueing of the cqr) */
1085 if (erp->function != dasd_3990_erp_bus_out) {
1086 erp->retries = 256;
1087 erp->function = dasd_3990_erp_bus_out;
1088
1089 } else {
1090
1091 /* issue a message and wait for 'device ready' interrupt */
1092 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1093 "bus out parity error or BOPC requested by "
1094 "channel");
1095
1096 dasd_3990_erp_block_queue(erp, 60*HZ);
1097
1098 }
1099
1100 return erp;
1101
1102 } /* end dasd_3990_erp_bus_out */
1103
1104 /*
1105 * DASD_3990_ERP_EQUIP_CHECK
1106 *
1107 * DESCRIPTION
1108 * Handles 24 byte 'Equipment Check' error.
1109 *
1110 * PARAMETER
1111 * erp current erp_head
1112 * RETURN VALUES
1113 * erp new erp_head - pointer to new ERP
1114 */
1115 static struct dasd_ccw_req *
1116 dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense)
1117 {
1118
1119 struct dasd_device *device = erp->startdev;
1120
1121 erp->function = dasd_3990_erp_equip_check;
1122
1123 if (sense[1] & SNS1_WRITE_INHIBITED) {
1124 dev_info(&device->cdev->dev,
1125 "Write inhibited path encountered\n");
1126
1127 /* vary path offline
1128 internal error 04 - Path should be varied off-line.*/
1129 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1130 "device driver, reason=%s\n", "04");
1131
1132 erp = dasd_3990_erp_action_1(erp);
1133
1134 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1135
1136 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1137 "Equipment Check - " "environmental data present");
1138
1139 dasd_3990_handle_env_data(erp, sense);
1140
1141 erp = dasd_3990_erp_action_4(erp, sense);
1142
1143 } else if (sense[1] & SNS1_PERM_ERR) {
1144
1145 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1146 "Equipment Check - retry exhausted or "
1147 "undesirable");
1148
1149 erp = dasd_3990_erp_action_1(erp);
1150
1151 } else {
1152 /* all other equipment checks - Action 5 */
1153 /* rest is done when retries == 0 */
1154 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1155 "Equipment check or processing error");
1156
1157 erp = dasd_3990_erp_action_5(erp);
1158 }
1159 return erp;
1160
1161 } /* end dasd_3990_erp_equip_check */
1162
1163 /*
1164 * DASD_3990_ERP_DATA_CHECK
1165 *
1166 * DESCRIPTION
1167 * Handles 24 byte 'Data Check' error.
1168 *
1169 * PARAMETER
1170 * erp current erp_head
1171 * RETURN VALUES
1172 * erp new erp_head - pointer to new ERP
1173 */
1174 static struct dasd_ccw_req *
1175 dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense)
1176 {
1177
1178 struct dasd_device *device = erp->startdev;
1179
1180 erp->function = dasd_3990_erp_data_check;
1181
1182 if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */
1183
1184 /* issue message that the data has been corrected */
1185 dev_emerg(&device->cdev->dev,
1186 "Data recovered during retry with PCI "
1187 "fetch mode active\n");
1188
1189 /* not possible to handle this situation in Linux */
1190 panic("No way to inform application about the possibly "
1191 "incorrect data");
1192
1193 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1194
1195 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1196 "Uncorrectable data check recovered secondary "
1197 "addr of duplex pair");
1198
1199 erp = dasd_3990_erp_action_4(erp, sense);
1200
1201 } else if (sense[1] & SNS1_PERM_ERR) {
1202
1203 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1204 "Uncorrectable data check with internal "
1205 "retry exhausted");
1206
1207 erp = dasd_3990_erp_action_1(erp);
1208
1209 } else {
1210 /* all other data checks */
1211 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1212 "Uncorrectable data check with retry count "
1213 "exhausted...");
1214
1215 erp = dasd_3990_erp_action_5(erp);
1216 }
1217
1218 return erp;
1219
1220 } /* end dasd_3990_erp_data_check */
1221
1222 /*
1223 * DASD_3990_ERP_OVERRUN
1224 *
1225 * DESCRIPTION
1226 * Handles 24 byte 'Overrun' error.
1227 *
1228 * PARAMETER
1229 * erp current erp_head
1230 * RETURN VALUES
1231 * erp new erp_head - pointer to new ERP
1232 */
1233 static struct dasd_ccw_req *
1234 dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense)
1235 {
1236
1237 struct dasd_device *device = erp->startdev;
1238
1239 erp->function = dasd_3990_erp_overrun;
1240
1241 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1242 "Overrun - service overrun or overrun"
1243 " error requested by channel");
1244
1245 erp = dasd_3990_erp_action_5(erp);
1246
1247 return erp;
1248
1249 } /* end dasd_3990_erp_overrun */
1250
1251 /*
1252 * DASD_3990_ERP_INV_FORMAT
1253 *
1254 * DESCRIPTION
1255 * Handles 24 byte 'Invalid Track Format' error.
1256 *
1257 * PARAMETER
1258 * erp current erp_head
1259 * RETURN VALUES
1260 * erp new erp_head - pointer to new ERP
1261 */
1262 static struct dasd_ccw_req *
1263 dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense)
1264 {
1265
1266 struct dasd_device *device = erp->startdev;
1267
1268 erp->function = dasd_3990_erp_inv_format;
1269
1270 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1271
1272 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1273 "Track format error when destaging or "
1274 "staging data");
1275
1276 dasd_3990_handle_env_data(erp, sense);
1277
1278 erp = dasd_3990_erp_action_4(erp, sense);
1279
1280 } else {
1281 /* internal error 06 - The track format is not valid*/
1282 dev_err(&device->cdev->dev,
1283 "An error occurred in the DASD device driver, "
1284 "reason=%s\n", "06");
1285
1286 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1287 }
1288
1289 return erp;
1290
1291 } /* end dasd_3990_erp_inv_format */
1292
1293 /*
1294 * DASD_3990_ERP_EOC
1295 *
1296 * DESCRIPTION
1297 * Handles 24 byte 'End-of-Cylinder' error.
1298 *
1299 * PARAMETER
1300 * erp already added default erp
1301 * RETURN VALUES
1302 * erp pointer to original (failed) cqr.
1303 */
1304 static struct dasd_ccw_req *
1305 dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense)
1306 {
1307
1308 struct dasd_device *device = default_erp->startdev;
1309
1310 dev_err(&device->cdev->dev,
1311 "The cylinder data for accessing the DASD is inconsistent\n");
1312
1313 /* implement action 7 - BUG */
1314 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1315
1316 } /* end dasd_3990_erp_EOC */
1317
1318 /*
1319 * DASD_3990_ERP_ENV_DATA
1320 *
1321 * DESCRIPTION
1322 * Handles 24 byte 'Environmental-Data Present' error.
1323 *
1324 * PARAMETER
1325 * erp current erp_head
1326 * RETURN VALUES
1327 * erp new erp_head - pointer to new ERP
1328 */
1329 static struct dasd_ccw_req *
1330 dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense)
1331 {
1332
1333 struct dasd_device *device = erp->startdev;
1334
1335 erp->function = dasd_3990_erp_env_data;
1336
1337 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Environmental data present");
1338
1339 dasd_3990_handle_env_data(erp, sense);
1340
1341 /* don't retry on disabled interface */
1342 if (sense[7] != 0x0F) {
1343 erp = dasd_3990_erp_action_4(erp, sense);
1344 } else {
1345 erp->status = DASD_CQR_FILLED;
1346 }
1347
1348 return erp;
1349
1350 } /* end dasd_3990_erp_env_data */
1351
1352 /*
1353 * DASD_3990_ERP_NO_REC
1354 *
1355 * DESCRIPTION
1356 * Handles 24 byte 'No Record Found' error.
1357 *
1358 * PARAMETER
1359 * erp already added default ERP
1360 *
1361 * RETURN VALUES
1362 * erp new erp_head - pointer to new ERP
1363 */
1364 static struct dasd_ccw_req *
1365 dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense)
1366 {
1367
1368 struct dasd_device *device = default_erp->startdev;
1369
1370 dev_err(&device->cdev->dev,
1371 "The specified record was not found\n");
1372
1373 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1374
1375 } /* end dasd_3990_erp_no_rec */
1376
1377 /*
1378 * DASD_3990_ERP_FILE_PROT
1379 *
1380 * DESCRIPTION
1381 * Handles 24 byte 'File Protected' error.
1382 * Note: Seek related recovery is not implemented because
1383 * wee don't use the seek command yet.
1384 *
1385 * PARAMETER
1386 * erp current erp_head
1387 * RETURN VALUES
1388 * erp new erp_head - pointer to new ERP
1389 */
1390 static struct dasd_ccw_req *
1391 dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
1392 {
1393
1394 struct dasd_device *device = erp->startdev;
1395
1396 dev_err(&device->cdev->dev, "Accessing the DASD failed because of "
1397 "a hardware error\n");
1398
1399 return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1400
1401 } /* end dasd_3990_erp_file_prot */
1402
1403 /*
1404 * DASD_3990_ERP_INSPECT_ALIAS
1405 *
1406 * DESCRIPTION
1407 * Checks if the original request was started on an alias device.
1408 * If yes, it modifies the original and the erp request so that
1409 * the erp request can be started on a base device.
1410 *
1411 * PARAMETER
1412 * erp pointer to the currently created default ERP
1413 *
1414 * RETURN VALUES
1415 * erp pointer to the modified ERP, or NULL
1416 */
1417
1418 static struct dasd_ccw_req *dasd_3990_erp_inspect_alias(
1419 struct dasd_ccw_req *erp)
1420 {
1421 struct dasd_ccw_req *cqr = erp->refers;
1422 char *sense;
1423
1424 if (cqr->block &&
1425 (cqr->block->base != cqr->startdev)) {
1426
1427 sense = dasd_get_sense(&erp->refers->irb);
1428 /*
1429 * dynamic pav may have changed base alias mapping
1430 */
1431 if (!test_bit(DASD_FLAG_OFFLINE, &cqr->startdev->flags) && sense
1432 && (sense[0] == 0x10) && (sense[7] == 0x0F)
1433 && (sense[8] == 0x67)) {
1434 /*
1435 * remove device from alias handling to prevent new
1436 * requests from being scheduled on the
1437 * wrong alias device
1438 */
1439 dasd_alias_remove_device(cqr->startdev);
1440
1441 /* schedule worker to reload device */
1442 dasd_reload_device(cqr->startdev);
1443 }
1444
1445 if (cqr->startdev->features & DASD_FEATURE_ERPLOG) {
1446 DBF_DEV_EVENT(DBF_ERR, cqr->startdev,
1447 "ERP on alias device for request %p,"
1448 " recover on base device %s", cqr,
1449 dev_name(&cqr->block->base->cdev->dev));
1450 }
1451 dasd_eckd_reset_ccw_to_base_io(cqr);
1452 erp->startdev = cqr->block->base;
1453 erp->function = dasd_3990_erp_inspect_alias;
1454 return erp;
1455 } else
1456 return NULL;
1457 }
1458
1459
1460 /*
1461 * DASD_3990_ERP_INSPECT_24
1462 *
1463 * DESCRIPTION
1464 * Does a detailed inspection of the 24 byte sense data
1465 * and sets up a related error recovery action.
1466 *
1467 * PARAMETER
1468 * sense sense data of the actual error
1469 * erp pointer to the currently created default ERP
1470 *
1471 * RETURN VALUES
1472 * erp pointer to the (addtitional) ERP
1473 */
1474 static struct dasd_ccw_req *
1475 dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense)
1476 {
1477
1478 struct dasd_ccw_req *erp_filled = NULL;
1479
1480 /* Check sense for .... */
1481 /* 'Command Reject' */
1482 if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) {
1483 erp_filled = dasd_3990_erp_com_rej(erp, sense);
1484 }
1485 /* 'Intervention Required' */
1486 if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) {
1487 erp_filled = dasd_3990_erp_int_req(erp);
1488 }
1489 /* 'Bus Out Parity Check' */
1490 if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) {
1491 erp_filled = dasd_3990_erp_bus_out(erp);
1492 }
1493 /* 'Equipment Check' */
1494 if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) {
1495 erp_filled = dasd_3990_erp_equip_check(erp, sense);
1496 }
1497 /* 'Data Check' */
1498 if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) {
1499 erp_filled = dasd_3990_erp_data_check(erp, sense);
1500 }
1501 /* 'Overrun' */
1502 if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) {
1503 erp_filled = dasd_3990_erp_overrun(erp, sense);
1504 }
1505 /* 'Invalid Track Format' */
1506 if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) {
1507 erp_filled = dasd_3990_erp_inv_format(erp, sense);
1508 }
1509 /* 'End-of-Cylinder' */
1510 if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) {
1511 erp_filled = dasd_3990_erp_EOC(erp, sense);
1512 }
1513 /* 'Environmental Data' */
1514 if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) {
1515 erp_filled = dasd_3990_erp_env_data(erp, sense);
1516 }
1517 /* 'No Record Found' */
1518 if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) {
1519 erp_filled = dasd_3990_erp_no_rec(erp, sense);
1520 }
1521 /* 'File Protected' */
1522 if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) {
1523 erp_filled = dasd_3990_erp_file_prot(erp);
1524 }
1525 /* other (unknown) error - do default ERP */
1526 if (erp_filled == NULL) {
1527
1528 erp_filled = erp;
1529 }
1530
1531 return erp_filled;
1532
1533 } /* END dasd_3990_erp_inspect_24 */
1534
1535 /*
1536 *****************************************************************************
1537 * 32 byte sense ERP functions (only)
1538 *****************************************************************************
1539 */
1540
1541 /*
1542 * DASD_3990_ERPACTION_10_32
1543 *
1544 * DESCRIPTION
1545 * Handles 32 byte 'Action 10' of Single Program Action Codes.
1546 * Just retry and if retry doesn't work, return with error.
1547 *
1548 * PARAMETER
1549 * erp current erp_head
1550 * sense current sense data
1551 * RETURN VALUES
1552 * erp modified erp_head
1553 */
1554 static struct dasd_ccw_req *
1555 dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense)
1556 {
1557
1558 struct dasd_device *device = erp->startdev;
1559
1560 erp->retries = 256;
1561 erp->function = dasd_3990_erp_action_10_32;
1562
1563 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Perform logging requested");
1564
1565 return erp;
1566
1567 } /* end dasd_3990_erp_action_10_32 */
1568
1569 /*
1570 * DASD_3990_ERP_ACTION_1B_32
1571 *
1572 * DESCRIPTION
1573 * Handles 32 byte 'Action 1B' of Single Program Action Codes.
1574 * A write operation could not be finished because of an unexpected
1575 * condition.
1576 * The already created 'default erp' is used to get the link to
1577 * the erp chain, but it can not be used for this recovery
1578 * action because it contains no DE/LO data space.
1579 *
1580 * PARAMETER
1581 * default_erp already added default erp.
1582 * sense current sense data
1583 *
1584 * RETURN VALUES
1585 * erp new erp or
1586 * default_erp in case of imprecise ending or error
1587 */
1588 static struct dasd_ccw_req *
1589 dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1590 {
1591
1592 struct dasd_device *device = default_erp->startdev;
1593 __u32 cpa = 0;
1594 struct dasd_ccw_req *cqr;
1595 struct dasd_ccw_req *erp;
1596 struct DE_eckd_data *DE_data;
1597 struct PFX_eckd_data *PFX_data;
1598 char *LO_data; /* LO_eckd_data_t */
1599 struct ccw1 *ccw, *oldccw;
1600
1601 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1602 "Write not finished because of unexpected condition");
1603
1604 default_erp->function = dasd_3990_erp_action_1B_32;
1605
1606 /* determine the original cqr */
1607 cqr = default_erp;
1608
1609 while (cqr->refers != NULL) {
1610 cqr = cqr->refers;
1611 }
1612
1613 if (scsw_is_tm(&cqr->irb.scsw)) {
1614 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1615 "32 bit sense, action 1B is not defined"
1616 " in transport mode - just retry");
1617 return default_erp;
1618 }
1619
1620 /* for imprecise ending just do default erp */
1621 if (sense[1] & 0x01) {
1622 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1623 "Imprecise ending is set - just retry");
1624
1625 return default_erp;
1626 }
1627
1628 /* determine the address of the CCW to be restarted */
1629 /* Imprecise ending is not set -> addr from IRB-SCSW */
1630 cpa = default_erp->refers->irb.scsw.cmd.cpa;
1631
1632 if (cpa == 0) {
1633 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1634 "Unable to determine address of the CCW "
1635 "to be restarted");
1636
1637 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1638 }
1639
1640 /* Build new ERP request including DE/LO */
1641 erp = dasd_alloc_erp_request((char *) &cqr->magic,
1642 2 + 1,/* DE/LO + TIC */
1643 sizeof(struct DE_eckd_data) +
1644 sizeof(struct LO_eckd_data), device);
1645
1646 if (IS_ERR(erp)) {
1647 /* internal error 01 - Unable to allocate ERP */
1648 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1649 "device driver, reason=%s\n", "01");
1650 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1651 }
1652
1653 /* use original DE */
1654 DE_data = erp->data;
1655 oldccw = cqr->cpaddr;
1656 if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) {
1657 PFX_data = cqr->data;
1658 memcpy(DE_data, &PFX_data->define_extent,
1659 sizeof(struct DE_eckd_data));
1660 } else
1661 memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data));
1662
1663 /* create LO */
1664 LO_data = erp->data + sizeof(struct DE_eckd_data);
1665
1666 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1667 /* should not */
1668 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1669 }
1670
1671 if ((sense[7] & 0x3F) == 0x01) {
1672 /* operation code is WRITE DATA -> data area orientation */
1673 LO_data[0] = 0x81;
1674
1675 } else if ((sense[7] & 0x3F) == 0x03) {
1676 /* operation code is FORMAT WRITE -> index orientation */
1677 LO_data[0] = 0xC3;
1678
1679 } else {
1680 LO_data[0] = sense[7]; /* operation */
1681 }
1682
1683 LO_data[1] = sense[8]; /* auxiliary */
1684 LO_data[2] = sense[9];
1685 LO_data[3] = sense[3]; /* count */
1686 LO_data[4] = sense[29]; /* seek_addr.cyl */
1687 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1688 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1689
1690 memcpy(&(LO_data[8]), &(sense[11]), 8);
1691
1692 /* create DE ccw */
1693 ccw = erp->cpaddr;
1694 memset(ccw, 0, sizeof(struct ccw1));
1695 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
1696 ccw->flags = CCW_FLAG_CC;
1697 ccw->count = 16;
1698 ccw->cda = (__u32)(addr_t) DE_data;
1699
1700 /* create LO ccw */
1701 ccw++;
1702 memset(ccw, 0, sizeof(struct ccw1));
1703 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
1704 ccw->flags = CCW_FLAG_CC;
1705 ccw->count = 16;
1706 ccw->cda = (__u32)(addr_t) LO_data;
1707
1708 /* TIC to the failed ccw */
1709 ccw++;
1710 ccw->cmd_code = CCW_CMD_TIC;
1711 ccw->cda = cpa;
1712
1713 /* fill erp related fields */
1714 erp->flags = default_erp->flags;
1715 erp->function = dasd_3990_erp_action_1B_32;
1716 erp->refers = default_erp->refers;
1717 erp->startdev = device;
1718 erp->memdev = device;
1719 erp->magic = default_erp->magic;
1720 erp->expires = default_erp->expires;
1721 erp->retries = 256;
1722 erp->buildclk = get_tod_clock();
1723 erp->status = DASD_CQR_FILLED;
1724
1725 /* remove the default erp */
1726 dasd_free_erp_request(default_erp, device);
1727
1728 return erp;
1729
1730 } /* end dasd_3990_erp_action_1B_32 */
1731
1732 /*
1733 * DASD_3990_UPDATE_1B
1734 *
1735 * DESCRIPTION
1736 * Handles the update to the 32 byte 'Action 1B' of Single Program
1737 * Action Codes in case the first action was not successful.
1738 * The already created 'previous_erp' is the currently not successful
1739 * ERP.
1740 *
1741 * PARAMETER
1742 * previous_erp already created previous erp.
1743 * sense current sense data
1744 * RETURN VALUES
1745 * erp modified erp
1746 */
1747 static struct dasd_ccw_req *
1748 dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
1749 {
1750
1751 struct dasd_device *device = previous_erp->startdev;
1752 __u32 cpa = 0;
1753 struct dasd_ccw_req *cqr;
1754 struct dasd_ccw_req *erp;
1755 char *LO_data; /* struct LO_eckd_data */
1756 struct ccw1 *ccw;
1757
1758 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1759 "Write not finished because of unexpected condition"
1760 " - follow on");
1761
1762 /* determine the original cqr */
1763 cqr = previous_erp;
1764
1765 while (cqr->refers != NULL) {
1766 cqr = cqr->refers;
1767 }
1768
1769 if (scsw_is_tm(&cqr->irb.scsw)) {
1770 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1771 "32 bit sense, action 1B, update,"
1772 " in transport mode - just retry");
1773 return previous_erp;
1774 }
1775
1776 /* for imprecise ending just do default erp */
1777 if (sense[1] & 0x01) {
1778 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1779 "Imprecise ending is set - just retry");
1780
1781 previous_erp->status = DASD_CQR_FILLED;
1782
1783 return previous_erp;
1784 }
1785
1786 /* determine the address of the CCW to be restarted */
1787 /* Imprecise ending is not set -> addr from IRB-SCSW */
1788 cpa = previous_erp->irb.scsw.cmd.cpa;
1789
1790 if (cpa == 0) {
1791 /* internal error 02 -
1792 Unable to determine address of the CCW to be restarted */
1793 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1794 "device driver, reason=%s\n", "02");
1795
1796 previous_erp->status = DASD_CQR_FAILED;
1797
1798 return previous_erp;
1799 }
1800
1801 erp = previous_erp;
1802
1803 /* update the LO with the new returned sense data */
1804 LO_data = erp->data + sizeof(struct DE_eckd_data);
1805
1806 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1807 /* should not happen */
1808 previous_erp->status = DASD_CQR_FAILED;
1809
1810 return previous_erp;
1811 }
1812
1813 if ((sense[7] & 0x3F) == 0x01) {
1814 /* operation code is WRITE DATA -> data area orientation */
1815 LO_data[0] = 0x81;
1816
1817 } else if ((sense[7] & 0x3F) == 0x03) {
1818 /* operation code is FORMAT WRITE -> index orientation */
1819 LO_data[0] = 0xC3;
1820
1821 } else {
1822 LO_data[0] = sense[7]; /* operation */
1823 }
1824
1825 LO_data[1] = sense[8]; /* auxiliary */
1826 LO_data[2] = sense[9];
1827 LO_data[3] = sense[3]; /* count */
1828 LO_data[4] = sense[29]; /* seek_addr.cyl */
1829 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1830 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1831
1832 memcpy(&(LO_data[8]), &(sense[11]), 8);
1833
1834 /* TIC to the failed ccw */
1835 ccw = erp->cpaddr; /* addr of DE ccw */
1836 ccw++; /* addr of LE ccw */
1837 ccw++; /* addr of TIC ccw */
1838 ccw->cda = cpa;
1839
1840 erp->status = DASD_CQR_FILLED;
1841
1842 return erp;
1843
1844 } /* end dasd_3990_update_1B */
1845
1846 /*
1847 * DASD_3990_ERP_COMPOUND_RETRY
1848 *
1849 * DESCRIPTION
1850 * Handles the compound ERP action retry code.
1851 * NOTE: At least one retry is done even if zero is specified
1852 * by the sense data. This makes enqueueing of the request
1853 * easier.
1854 *
1855 * PARAMETER
1856 * sense sense data of the actual error
1857 * erp pointer to the currently created ERP
1858 *
1859 * RETURN VALUES
1860 * erp modified ERP pointer
1861 *
1862 */
1863 static void
1864 dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense)
1865 {
1866
1867 switch (sense[25] & 0x03) {
1868 case 0x00: /* no not retry */
1869 erp->retries = 1;
1870 break;
1871
1872 case 0x01: /* retry 2 times */
1873 erp->retries = 2;
1874 break;
1875
1876 case 0x02: /* retry 10 times */
1877 erp->retries = 10;
1878 break;
1879
1880 case 0x03: /* retry 256 times */
1881 erp->retries = 256;
1882 break;
1883
1884 default:
1885 BUG();
1886 }
1887
1888 erp->function = dasd_3990_erp_compound_retry;
1889
1890 } /* end dasd_3990_erp_compound_retry */
1891
1892 /*
1893 * DASD_3990_ERP_COMPOUND_PATH
1894 *
1895 * DESCRIPTION
1896 * Handles the compound ERP action for retry on alternate
1897 * channel path.
1898 *
1899 * PARAMETER
1900 * sense sense data of the actual error
1901 * erp pointer to the currently created ERP
1902 *
1903 * RETURN VALUES
1904 * erp modified ERP pointer
1905 *
1906 */
1907 static void
1908 dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
1909 {
1910 if (sense[25] & DASD_SENSE_BIT_3) {
1911 dasd_3990_erp_alternate_path(erp);
1912
1913 if (erp->status == DASD_CQR_FAILED &&
1914 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
1915 /* reset the lpm and the status to be able to
1916 * try further actions. */
1917 erp->lpm = erp->startdev->path_data.opm;
1918 erp->status = DASD_CQR_NEED_ERP;
1919 }
1920 }
1921
1922 erp->function = dasd_3990_erp_compound_path;
1923
1924 } /* end dasd_3990_erp_compound_path */
1925
1926 /*
1927 * DASD_3990_ERP_COMPOUND_CODE
1928 *
1929 * DESCRIPTION
1930 * Handles the compound ERP action for retry code.
1931 *
1932 * PARAMETER
1933 * sense sense data of the actual error
1934 * erp pointer to the currently created ERP
1935 *
1936 * RETURN VALUES
1937 * erp NEW ERP pointer
1938 *
1939 */
1940 static struct dasd_ccw_req *
1941 dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense)
1942 {
1943
1944 if (sense[25] & DASD_SENSE_BIT_2) {
1945
1946 switch (sense[28]) {
1947 case 0x17:
1948 /* issue a Diagnostic Control command with an
1949 * Inhibit Write subcommand and controller modifier */
1950 erp = dasd_3990_erp_DCTL(erp, 0x20);
1951 break;
1952
1953 case 0x25:
1954 /* wait for 5 seconds and retry again */
1955 erp->retries = 1;
1956
1957 dasd_3990_erp_block_queue (erp, 5*HZ);
1958 break;
1959
1960 default:
1961 /* should not happen - continue */
1962 break;
1963 }
1964 }
1965
1966 erp->function = dasd_3990_erp_compound_code;
1967
1968 return erp;
1969
1970 } /* end dasd_3990_erp_compound_code */
1971
1972 /*
1973 * DASD_3990_ERP_COMPOUND_CONFIG
1974 *
1975 * DESCRIPTION
1976 * Handles the compound ERP action for configruation
1977 * dependent error.
1978 * Note: duplex handling is not implemented (yet).
1979 *
1980 * PARAMETER
1981 * sense sense data of the actual error
1982 * erp pointer to the currently created ERP
1983 *
1984 * RETURN VALUES
1985 * erp modified ERP pointer
1986 *
1987 */
1988 static void
1989 dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
1990 {
1991
1992 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) {
1993
1994 /* set to suspended duplex state then restart
1995 internal error 05 - Set device to suspended duplex state
1996 should be done */
1997 struct dasd_device *device = erp->startdev;
1998 dev_err(&device->cdev->dev,
1999 "An error occurred in the DASD device driver, "
2000 "reason=%s\n", "05");
2001
2002 }
2003
2004 erp->function = dasd_3990_erp_compound_config;
2005
2006 } /* end dasd_3990_erp_compound_config */
2007
2008 /*
2009 * DASD_3990_ERP_COMPOUND
2010 *
2011 * DESCRIPTION
2012 * Does the further compound program action if
2013 * compound retry was not successful.
2014 *
2015 * PARAMETER
2016 * sense sense data of the actual error
2017 * erp pointer to the current (failed) ERP
2018 *
2019 * RETURN VALUES
2020 * erp (additional) ERP pointer
2021 *
2022 */
2023 static struct dasd_ccw_req *
2024 dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense)
2025 {
2026
2027 if ((erp->function == dasd_3990_erp_compound_retry) &&
2028 (erp->status == DASD_CQR_NEED_ERP)) {
2029
2030 dasd_3990_erp_compound_path(erp, sense);
2031 }
2032
2033 if ((erp->function == dasd_3990_erp_compound_path) &&
2034 (erp->status == DASD_CQR_NEED_ERP)) {
2035
2036 erp = dasd_3990_erp_compound_code(erp, sense);
2037 }
2038
2039 if ((erp->function == dasd_3990_erp_compound_code) &&
2040 (erp->status == DASD_CQR_NEED_ERP)) {
2041
2042 dasd_3990_erp_compound_config(erp, sense);
2043 }
2044
2045 /* if no compound action ERP specified, the request failed */
2046 if (erp->status == DASD_CQR_NEED_ERP)
2047 erp->status = DASD_CQR_FAILED;
2048
2049 return erp;
2050
2051 } /* end dasd_3990_erp_compound */
2052
2053 /*
2054 *DASD_3990_ERP_HANDLE_SIM
2055 *
2056 *DESCRIPTION
2057 * inspects the SIM SENSE data and starts an appropriate action
2058 *
2059 * PARAMETER
2060 * sense sense data of the actual error
2061 *
2062 * RETURN VALUES
2063 * none
2064 */
2065 void
2066 dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense)
2067 {
2068 /* print message according to log or message to operator mode */
2069 if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) {
2070 /* print SIM SRC from RefCode */
2071 dev_err(&device->cdev->dev, "SIM - SRC: "
2072 "%02x%02x%02x%02x\n", sense[22],
2073 sense[23], sense[11], sense[12]);
2074 } else if (sense[24] & DASD_SIM_LOG) {
2075 /* print SIM SRC Refcode */
2076 dev_warn(&device->cdev->dev, "log SIM - SRC: "
2077 "%02x%02x%02x%02x\n", sense[22],
2078 sense[23], sense[11], sense[12]);
2079 }
2080 }
2081
2082 /*
2083 * DASD_3990_ERP_INSPECT_32
2084 *
2085 * DESCRIPTION
2086 * Does a detailed inspection of the 32 byte sense data
2087 * and sets up a related error recovery action.
2088 *
2089 * PARAMETER
2090 * sense sense data of the actual error
2091 * erp pointer to the currently created default ERP
2092 *
2093 * RETURN VALUES
2094 * erp_filled pointer to the ERP
2095 *
2096 */
2097 static struct dasd_ccw_req *
2098 dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
2099 {
2100
2101 struct dasd_device *device = erp->startdev;
2102
2103 erp->function = dasd_3990_erp_inspect_32;
2104
2105 /* check for SIM sense data */
2106 if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)
2107 dasd_3990_erp_handle_sim(device, sense);
2108
2109 if (sense[25] & DASD_SENSE_BIT_0) {
2110
2111 /* compound program action codes (byte25 bit 0 == '1') */
2112 dasd_3990_erp_compound_retry(erp, sense);
2113
2114 } else {
2115
2116 /* single program action codes (byte25 bit 0 == '0') */
2117 switch (sense[25]) {
2118
2119 case 0x00: /* success - use default ERP for retries */
2120 DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
2121 "ERP called for successful request"
2122 " - just retry");
2123 break;
2124
2125 case 0x01: /* fatal error */
2126 dev_err(&device->cdev->dev,
2127 "ERP failed for the DASD\n");
2128
2129 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2130 break;
2131
2132 case 0x02: /* intervention required */
2133 case 0x03: /* intervention required during dual copy */
2134 erp = dasd_3990_erp_int_req(erp);
2135 break;
2136
2137 case 0x0F: /* length mismatch during update write command
2138 internal error 08 - update write command error*/
2139 dev_err(&device->cdev->dev, "An error occurred in the "
2140 "DASD device driver, reason=%s\n", "08");
2141
2142 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2143 break;
2144
2145 case 0x10: /* logging required for other channel program */
2146 erp = dasd_3990_erp_action_10_32(erp, sense);
2147 break;
2148
2149 case 0x15: /* next track outside defined extend
2150 internal error 07 - The next track is not
2151 within the defined storage extent */
2152 dev_err(&device->cdev->dev,
2153 "An error occurred in the DASD device driver, "
2154 "reason=%s\n", "07");
2155
2156 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2157 break;
2158
2159 case 0x1B: /* unexpected condition during write */
2160
2161 erp = dasd_3990_erp_action_1B_32(erp, sense);
2162 break;
2163
2164 case 0x1C: /* invalid data */
2165 dev_emerg(&device->cdev->dev,
2166 "Data recovered during retry with PCI "
2167 "fetch mode active\n");
2168
2169 /* not possible to handle this situation in Linux */
2170 panic
2171 ("Invalid data - No way to inform application "
2172 "about the possibly incorrect data");
2173 break;
2174
2175 case 0x1D: /* state-change pending */
2176 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2177 "A State change pending condition exists "
2178 "for the subsystem or device");
2179
2180 erp = dasd_3990_erp_action_4(erp, sense);
2181 break;
2182
2183 case 0x1E: /* busy */
2184 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2185 "Busy condition exists "
2186 "for the subsystem or device");
2187 erp = dasd_3990_erp_action_4(erp, sense);
2188 break;
2189
2190 default: /* all others errors - default erp */
2191 break;
2192 }
2193 }
2194
2195 return erp;
2196
2197 } /* end dasd_3990_erp_inspect_32 */
2198
2199 /*
2200 *****************************************************************************
2201 * main ERP control functions (24 and 32 byte sense)
2202 *****************************************************************************
2203 */
2204
2205 /*
2206 * DASD_3990_ERP_CONTROL_CHECK
2207 *
2208 * DESCRIPTION
2209 * Does a generic inspection if a control check occurred and sets up
2210 * the related error recovery procedure
2211 *
2212 * PARAMETER
2213 * erp pointer to the currently created default ERP
2214 *
2215 * RETURN VALUES
2216 * erp_filled pointer to the erp
2217 */
2218
2219 static struct dasd_ccw_req *
2220 dasd_3990_erp_control_check(struct dasd_ccw_req *erp)
2221 {
2222 struct dasd_device *device = erp->startdev;
2223
2224 if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK
2225 | SCHN_STAT_CHN_CTRL_CHK)) {
2226 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2227 "channel or interface control check");
2228 erp = dasd_3990_erp_action_4(erp, NULL);
2229 }
2230 return erp;
2231 }
2232
2233 /*
2234 * DASD_3990_ERP_INSPECT
2235 *
2236 * DESCRIPTION
2237 * Does a detailed inspection for sense data by calling either
2238 * the 24-byte or the 32-byte inspection routine.
2239 *
2240 * PARAMETER
2241 * erp pointer to the currently created default ERP
2242 * RETURN VALUES
2243 * erp_new contens was possibly modified
2244 */
2245 static struct dasd_ccw_req *
2246 dasd_3990_erp_inspect(struct dasd_ccw_req *erp)
2247 {
2248
2249 struct dasd_ccw_req *erp_new = NULL;
2250 char *sense;
2251
2252 /* if this problem occurred on an alias retry on base */
2253 erp_new = dasd_3990_erp_inspect_alias(erp);
2254 if (erp_new)
2255 return erp_new;
2256
2257 /* sense data are located in the refers record of the
2258 * already set up new ERP !
2259 * check if concurrent sens is available
2260 */
2261 sense = dasd_get_sense(&erp->refers->irb);
2262 if (!sense)
2263 erp_new = dasd_3990_erp_control_check(erp);
2264 /* distinguish between 24 and 32 byte sense data */
2265 else if (sense[27] & DASD_SENSE_BIT_0) {
2266
2267 /* inspect the 24 byte sense data */
2268 erp_new = dasd_3990_erp_inspect_24(erp, sense);
2269
2270 } else {
2271
2272 /* inspect the 32 byte sense data */
2273 erp_new = dasd_3990_erp_inspect_32(erp, sense);
2274
2275 } /* end distinguish between 24 and 32 byte sense data */
2276
2277 return erp_new;
2278 }
2279
2280 /*
2281 * DASD_3990_ERP_ADD_ERP
2282 *
2283 * DESCRIPTION
2284 * This function adds an additional request block (ERP) to the head of
2285 * the given cqr (or erp).
2286 * For a command mode cqr the erp is initialized as an default erp
2287 * (retry TIC).
2288 * For transport mode we make a copy of the original TCW (points to
2289 * the original TCCB, TIDALs, etc.) but give it a fresh
2290 * TSB so the original sense data will not be changed.
2291 *
2292 * PARAMETER
2293 * cqr head of the current ERP-chain (or single cqr if
2294 * first error)
2295 * RETURN VALUES
2296 * erp pointer to new ERP-chain head
2297 */
2298 static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr)
2299 {
2300
2301 struct dasd_device *device = cqr->startdev;
2302 struct ccw1 *ccw;
2303 struct dasd_ccw_req *erp;
2304 int cplength, datasize;
2305 struct tcw *tcw;
2306 struct tsb *tsb;
2307
2308 if (cqr->cpmode == 1) {
2309 cplength = 0;
2310 /* TCW needs to be 64 byte aligned, so leave enough room */
2311 datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb);
2312 } else {
2313 cplength = 2;
2314 datasize = 0;
2315 }
2316
2317 /* allocate additional request block */
2318 erp = dasd_alloc_erp_request((char *) &cqr->magic,
2319 cplength, datasize, device);
2320 if (IS_ERR(erp)) {
2321 if (cqr->retries <= 0) {
2322 DBF_DEV_EVENT(DBF_ERR, device, "%s",
2323 "Unable to allocate ERP request");
2324 cqr->status = DASD_CQR_FAILED;
2325 cqr->stopclk = get_tod_clock();
2326 } else {
2327 DBF_DEV_EVENT(DBF_ERR, device,
2328 "Unable to allocate ERP request "
2329 "(%i retries left)",
2330 cqr->retries);
2331 dasd_block_set_timer(device->block, (HZ << 3));
2332 }
2333 return erp;
2334 }
2335
2336 ccw = cqr->cpaddr;
2337 if (cqr->cpmode == 1) {
2338 /* make a shallow copy of the original tcw but set new tsb */
2339 erp->cpmode = 1;
2340 erp->cpaddr = PTR_ALIGN(erp->data, 64);
2341 tcw = erp->cpaddr;
2342 tsb = (struct tsb *) &tcw[1];
2343 *tcw = *((struct tcw *)cqr->cpaddr);
2344 tcw->tsb = (long)tsb;
2345 } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) {
2346 /* PSF cannot be chained from NOOP/TIC */
2347 erp->cpaddr = cqr->cpaddr;
2348 } else {
2349 /* initialize request with default TIC to current ERP/CQR */
2350 ccw = erp->cpaddr;
2351 ccw->cmd_code = CCW_CMD_NOOP;
2352 ccw->flags = CCW_FLAG_CC;
2353 ccw++;
2354 ccw->cmd_code = CCW_CMD_TIC;
2355 ccw->cda = (long)(cqr->cpaddr);
2356 }
2357
2358 erp->flags = cqr->flags;
2359 erp->function = dasd_3990_erp_add_erp;
2360 erp->refers = cqr;
2361 erp->startdev = device;
2362 erp->memdev = device;
2363 erp->block = cqr->block;
2364 erp->magic = cqr->magic;
2365 erp->expires = cqr->expires;
2366 erp->retries = 256;
2367 erp->buildclk = get_tod_clock();
2368 erp->status = DASD_CQR_FILLED;
2369
2370 return erp;
2371 }
2372
2373 /*
2374 * DASD_3990_ERP_ADDITIONAL_ERP
2375 *
2376 * DESCRIPTION
2377 * An additional ERP is needed to handle the current error.
2378 * Add ERP to the head of the ERP-chain containing the ERP processing
2379 * determined based on the sense data.
2380 *
2381 * PARAMETER
2382 * cqr head of the current ERP-chain (or single cqr if
2383 * first error)
2384 *
2385 * RETURN VALUES
2386 * erp pointer to new ERP-chain head
2387 */
2388 static struct dasd_ccw_req *
2389 dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr)
2390 {
2391
2392 struct dasd_ccw_req *erp = NULL;
2393
2394 /* add erp and initialize with default TIC */
2395 erp = dasd_3990_erp_add_erp(cqr);
2396
2397 if (IS_ERR(erp))
2398 return erp;
2399
2400 /* inspect sense, determine specific ERP if possible */
2401 if (erp != cqr) {
2402
2403 erp = dasd_3990_erp_inspect(erp);
2404 }
2405
2406 return erp;
2407
2408 } /* end dasd_3990_erp_additional_erp */
2409
2410 /*
2411 * DASD_3990_ERP_ERROR_MATCH
2412 *
2413 * DESCRIPTION
2414 * Check if the device status of the given cqr is the same.
2415 * This means that the failed CCW and the relevant sense data
2416 * must match.
2417 * I don't distinguish between 24 and 32 byte sense because in case of
2418 * 24 byte sense byte 25 and 27 is set as well.
2419 *
2420 * PARAMETER
2421 * cqr1 first cqr, which will be compared with the
2422 * cqr2 second cqr.
2423 *
2424 * RETURN VALUES
2425 * match 'boolean' for match found
2426 * returns 1 if match found, otherwise 0.
2427 */
2428 static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1,
2429 struct dasd_ccw_req *cqr2)
2430 {
2431 char *sense1, *sense2;
2432
2433 if (cqr1->startdev != cqr2->startdev)
2434 return 0;
2435
2436 sense1 = dasd_get_sense(&cqr1->irb);
2437 sense2 = dasd_get_sense(&cqr2->irb);
2438
2439 /* one request has sense data, the other not -> no match, return 0 */
2440 if (!sense1 != !sense2)
2441 return 0;
2442 /* no sense data in both cases -> check cstat for IFCC */
2443 if (!sense1 && !sense2) {
2444 if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
2445 SCHN_STAT_CHN_CTRL_CHK)) ==
2446 (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
2447 SCHN_STAT_CHN_CTRL_CHK)))
2448 return 1; /* match with ifcc*/
2449 }
2450 /* check sense data; byte 0-2,25,27 */
2451 if (!(sense1 && sense2 &&
2452 (memcmp(sense1, sense2, 3) == 0) &&
2453 (sense1[27] == sense2[27]) &&
2454 (sense1[25] == sense2[25]))) {
2455
2456 return 0; /* sense doesn't match */
2457 }
2458
2459 return 1; /* match */
2460
2461 } /* end dasd_3990_erp_error_match */
2462
2463 /*
2464 * DASD_3990_ERP_IN_ERP
2465 *
2466 * DESCRIPTION
2467 * check if the current error already happened before.
2468 * quick exit if current cqr is not an ERP (cqr->refers=NULL)
2469 *
2470 * PARAMETER
2471 * cqr failed cqr (either original cqr or already an erp)
2472 *
2473 * RETURN VALUES
2474 * erp erp-pointer to the already defined error
2475 * recovery procedure OR
2476 * NULL if a 'new' error occurred.
2477 */
2478 static struct dasd_ccw_req *
2479 dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr)
2480 {
2481
2482 struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */
2483 *erp_match = NULL; /* save erp chain head */
2484 int match = 0; /* 'boolean' for matching error found */
2485
2486 if (cqr->refers == NULL) { /* return if not in erp */
2487 return NULL;
2488 }
2489
2490 /* check the erp/cqr chain for current error */
2491 do {
2492 match = dasd_3990_erp_error_match(erp_head, cqr->refers);
2493 erp_match = cqr; /* save possible matching erp */
2494 cqr = cqr->refers; /* check next erp/cqr in queue */
2495
2496 } while ((cqr->refers != NULL) && (!match));
2497
2498 if (!match) {
2499 return NULL; /* no match was found */
2500 }
2501
2502 return erp_match; /* return address of matching erp */
2503
2504 } /* END dasd_3990_erp_in_erp */
2505
2506 /*
2507 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense)
2508 *
2509 * DESCRIPTION
2510 * No retry is left for the current ERP. Check what has to be done
2511 * with the ERP.
2512 * - do further defined ERP action or
2513 * - wait for interrupt or
2514 * - exit with permanent error
2515 *
2516 * PARAMETER
2517 * erp ERP which is in progress with no retry left
2518 *
2519 * RETURN VALUES
2520 * erp modified/additional ERP
2521 */
2522 static struct dasd_ccw_req *
2523 dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
2524 {
2525
2526 struct dasd_device *device = erp->startdev;
2527 char *sense = dasd_get_sense(&erp->irb);
2528
2529 /* check for 24 byte sense ERP */
2530 if ((erp->function == dasd_3990_erp_bus_out) ||
2531 (erp->function == dasd_3990_erp_action_1) ||
2532 (erp->function == dasd_3990_erp_action_4)) {
2533
2534 erp = dasd_3990_erp_action_1(erp);
2535
2536 } else if (erp->function == dasd_3990_erp_action_1_sec) {
2537 erp = dasd_3990_erp_action_1_sec(erp);
2538 } else if (erp->function == dasd_3990_erp_action_5) {
2539
2540 /* retries have not been successful */
2541 /* prepare erp for retry on different channel path */
2542 erp = dasd_3990_erp_action_1(erp);
2543
2544 if (sense && !(sense[2] & DASD_SENSE_BIT_0)) {
2545
2546 /* issue a Diagnostic Control command with an
2547 * Inhibit Write subcommand */
2548
2549 switch (sense[25]) {
2550 case 0x17:
2551 case 0x57:{ /* controller */
2552 erp = dasd_3990_erp_DCTL(erp, 0x20);
2553 break;
2554 }
2555 case 0x18:
2556 case 0x58:{ /* channel path */
2557 erp = dasd_3990_erp_DCTL(erp, 0x40);
2558 break;
2559 }
2560 case 0x19:
2561 case 0x59:{ /* storage director */
2562 erp = dasd_3990_erp_DCTL(erp, 0x80);
2563 break;
2564 }
2565 default:
2566 DBF_DEV_EVENT(DBF_WARNING, device,
2567 "invalid subcommand modifier 0x%x "
2568 "for Diagnostic Control Command",
2569 sense[25]);
2570 }
2571 }
2572
2573 /* check for 32 byte sense ERP */
2574 } else if (sense &&
2575 ((erp->function == dasd_3990_erp_compound_retry) ||
2576 (erp->function == dasd_3990_erp_compound_path) ||
2577 (erp->function == dasd_3990_erp_compound_code) ||
2578 (erp->function == dasd_3990_erp_compound_config))) {
2579
2580 erp = dasd_3990_erp_compound(erp, sense);
2581
2582 } else {
2583 /*
2584 * No retry left and no additional special handling
2585 * necessary
2586 */
2587 dev_err(&device->cdev->dev,
2588 "ERP %p has run out of retries and failed\n", erp);
2589
2590 erp->status = DASD_CQR_FAILED;
2591 }
2592
2593 return erp;
2594
2595 } /* end dasd_3990_erp_further_erp */
2596
2597 /*
2598 * DASD_3990_ERP_HANDLE_MATCH_ERP
2599 *
2600 * DESCRIPTION
2601 * An error occurred again and an ERP has been detected which is already
2602 * used to handle this error (e.g. retries).
2603 * All prior ERP's are asumed to be successful and therefore removed
2604 * from queue.
2605 * If retry counter of matching erp is already 0, it is checked if further
2606 * action is needed (besides retry) or if the ERP has failed.
2607 *
2608 * PARAMETER
2609 * erp_head first ERP in ERP-chain
2610 * erp ERP that handles the actual error.
2611 * (matching erp)
2612 *
2613 * RETURN VALUES
2614 * erp modified/additional ERP
2615 */
2616 static struct dasd_ccw_req *
2617 dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
2618 struct dasd_ccw_req *erp)
2619 {
2620
2621 struct dasd_device *device = erp_head->startdev;
2622 struct dasd_ccw_req *erp_done = erp_head; /* finished req */
2623 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */
2624
2625 /* loop over successful ERPs and remove them from chanq */
2626 while (erp_done != erp) {
2627
2628 if (erp_done == NULL) /* end of chain reached */
2629 panic(PRINTK_HEADER "Programming error in ERP! The "
2630 "original request was lost\n");
2631
2632 /* remove the request from the device queue */
2633 list_del(&erp_done->blocklist);
2634
2635 erp_free = erp_done;
2636 erp_done = erp_done->refers;
2637
2638 /* free the finished erp request */
2639 dasd_free_erp_request(erp_free, erp_free->memdev);
2640
2641 } /* end while */
2642
2643 if (erp->retries > 0) {
2644
2645 char *sense = dasd_get_sense(&erp->refers->irb);
2646
2647 /* check for special retries */
2648 if (sense && erp->function == dasd_3990_erp_action_4) {
2649
2650 erp = dasd_3990_erp_action_4(erp, sense);
2651
2652 } else if (sense &&
2653 erp->function == dasd_3990_erp_action_1B_32) {
2654
2655 erp = dasd_3990_update_1B(erp, sense);
2656
2657 } else if (sense && erp->function == dasd_3990_erp_int_req) {
2658
2659 erp = dasd_3990_erp_int_req(erp);
2660
2661 } else {
2662 /* simple retry */
2663 DBF_DEV_EVENT(DBF_DEBUG, device,
2664 "%i retries left for erp %p",
2665 erp->retries, erp);
2666
2667 /* handle the request again... */
2668 erp->status = DASD_CQR_FILLED;
2669 }
2670
2671 } else {
2672 /* no retry left - check for further necessary action */
2673 /* if no further actions, handle rest as permanent error */
2674 erp = dasd_3990_erp_further_erp(erp);
2675 }
2676
2677 return erp;
2678
2679 } /* end dasd_3990_erp_handle_match_erp */
2680
2681 /*
2682 * DASD_3990_ERP_ACTION
2683 *
2684 * DESCRIPTION
2685 * control routine for 3990 erp actions.
2686 * Has to be called with the queue lock (namely the s390_irq_lock) acquired.
2687 *
2688 * PARAMETER
2689 * cqr failed cqr (either original cqr or already an erp)
2690 *
2691 * RETURN VALUES
2692 * erp erp-pointer to the head of the ERP action chain.
2693 * This means:
2694 * - either a ptr to an additional ERP cqr or
2695 * - the original given cqr (which's status might
2696 * be modified)
2697 */
2698 struct dasd_ccw_req *
2699 dasd_3990_erp_action(struct dasd_ccw_req * cqr)
2700 {
2701 struct dasd_ccw_req *erp = NULL;
2702 struct dasd_device *device = cqr->startdev;
2703 struct dasd_ccw_req *temp_erp = NULL;
2704
2705 if (device->features & DASD_FEATURE_ERPLOG) {
2706 /* print current erp_chain */
2707 dev_err(&device->cdev->dev,
2708 "ERP chain at BEGINNING of ERP-ACTION\n");
2709 for (temp_erp = cqr;
2710 temp_erp != NULL; temp_erp = temp_erp->refers) {
2711
2712 dev_err(&device->cdev->dev,
2713 "ERP %p (%02x) refers to %p\n",
2714 temp_erp, temp_erp->status,
2715 temp_erp->refers);
2716 }
2717 }
2718
2719 /* double-check if current erp/cqr was successful */
2720 if ((scsw_cstat(&cqr->irb.scsw) == 0x00) &&
2721 (scsw_dstat(&cqr->irb.scsw) ==
2722 (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) {
2723
2724 DBF_DEV_EVENT(DBF_DEBUG, device,
2725 "ERP called for successful request %p"
2726 " - NO ERP necessary", cqr);
2727
2728 cqr->status = DASD_CQR_DONE;
2729
2730 return cqr;
2731 }
2732
2733 /* check if error happened before */
2734 erp = dasd_3990_erp_in_erp(cqr);
2735
2736 if (erp == NULL) {
2737 /* no matching erp found - set up erp */
2738 erp = dasd_3990_erp_additional_erp(cqr);
2739 if (IS_ERR(erp))
2740 return erp;
2741 } else {
2742 /* matching erp found - set all leading erp's to DONE */
2743 erp = dasd_3990_erp_handle_match_erp(cqr, erp);
2744 }
2745
2746 if (device->features & DASD_FEATURE_ERPLOG) {
2747 /* print current erp_chain */
2748 dev_err(&device->cdev->dev,
2749 "ERP chain at END of ERP-ACTION\n");
2750 for (temp_erp = erp;
2751 temp_erp != NULL; temp_erp = temp_erp->refers) {
2752
2753 dev_err(&device->cdev->dev,
2754 "ERP %p (%02x) refers to %p\n",
2755 temp_erp, temp_erp->status,
2756 temp_erp->refers);
2757 }
2758 }
2759
2760 /* enqueue ERP request if it's a new one */
2761 if (list_empty(&erp->blocklist)) {
2762 cqr->status = DASD_CQR_IN_ERP;
2763 /* add erp request before the cqr */
2764 list_add_tail(&erp->blocklist, &cqr->blocklist);
2765 }
2766
2767
2768
2769 return erp;
2770
2771 } /* end dasd_3990_erp_action */
Linux kernel - Deliverables
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