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[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 /*
1371 * In some cases the 'No Record Found' error might be expected and
1372 * log messages shouldn't be written then.
1373 * Check if the according suppress bit is set.
1374 */
1375 if (!test_bit(DASD_CQR_SUPPRESS_NRF, &default_erp->flags))
1376 dev_err(&device->cdev->dev,
1377 "The specified record was not found\n");
1378
1379 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1380
1381 } /* end dasd_3990_erp_no_rec */
1382
1383 /*
1384 * DASD_3990_ERP_FILE_PROT
1385 *
1386 * DESCRIPTION
1387 * Handles 24 byte 'File Protected' error.
1388 * Note: Seek related recovery is not implemented because
1389 * wee don't use the seek command yet.
1390 *
1391 * PARAMETER
1392 * erp current erp_head
1393 * RETURN VALUES
1394 * erp new erp_head - pointer to new ERP
1395 */
1396 static struct dasd_ccw_req *
1397 dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
1398 {
1399
1400 struct dasd_device *device = erp->startdev;
1401
1402 /*
1403 * In some cases the 'File Protected' error might be expected and
1404 * log messages shouldn't be written then.
1405 * Check if the according suppress bit is set.
1406 */
1407 if (!test_bit(DASD_CQR_SUPPRESS_FP, &erp->flags))
1408 dev_err(&device->cdev->dev,
1409 "Accessing the DASD failed because of a hardware error\n");
1410
1411 return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1412
1413 } /* end dasd_3990_erp_file_prot */
1414
1415 /*
1416 * DASD_3990_ERP_INSPECT_ALIAS
1417 *
1418 * DESCRIPTION
1419 * Checks if the original request was started on an alias device.
1420 * If yes, it modifies the original and the erp request so that
1421 * the erp request can be started on a base device.
1422 *
1423 * PARAMETER
1424 * erp pointer to the currently created default ERP
1425 *
1426 * RETURN VALUES
1427 * erp pointer to the modified ERP, or NULL
1428 */
1429
1430 static struct dasd_ccw_req *dasd_3990_erp_inspect_alias(
1431 struct dasd_ccw_req *erp)
1432 {
1433 struct dasd_ccw_req *cqr = erp->refers;
1434 char *sense;
1435
1436 if (cqr->block &&
1437 (cqr->block->base != cqr->startdev)) {
1438
1439 sense = dasd_get_sense(&erp->refers->irb);
1440 /*
1441 * dynamic pav may have changed base alias mapping
1442 */
1443 if (!test_bit(DASD_FLAG_OFFLINE, &cqr->startdev->flags) && sense
1444 && (sense[0] == 0x10) && (sense[7] == 0x0F)
1445 && (sense[8] == 0x67)) {
1446 /*
1447 * remove device from alias handling to prevent new
1448 * requests from being scheduled on the
1449 * wrong alias device
1450 */
1451 dasd_alias_remove_device(cqr->startdev);
1452
1453 /* schedule worker to reload device */
1454 dasd_reload_device(cqr->startdev);
1455 }
1456
1457 if (cqr->startdev->features & DASD_FEATURE_ERPLOG) {
1458 DBF_DEV_EVENT(DBF_ERR, cqr->startdev,
1459 "ERP on alias device for request %p,"
1460 " recover on base device %s", cqr,
1461 dev_name(&cqr->block->base->cdev->dev));
1462 }
1463 dasd_eckd_reset_ccw_to_base_io(cqr);
1464 erp->startdev = cqr->block->base;
1465 erp->function = dasd_3990_erp_inspect_alias;
1466 return erp;
1467 } else
1468 return NULL;
1469 }
1470
1471
1472 /*
1473 * DASD_3990_ERP_INSPECT_24
1474 *
1475 * DESCRIPTION
1476 * Does a detailed inspection of the 24 byte sense data
1477 * and sets up a related error recovery action.
1478 *
1479 * PARAMETER
1480 * sense sense data of the actual error
1481 * erp pointer to the currently created default ERP
1482 *
1483 * RETURN VALUES
1484 * erp pointer to the (addtitional) ERP
1485 */
1486 static struct dasd_ccw_req *
1487 dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense)
1488 {
1489
1490 struct dasd_ccw_req *erp_filled = NULL;
1491
1492 /* Check sense for .... */
1493 /* 'Command Reject' */
1494 if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) {
1495 erp_filled = dasd_3990_erp_com_rej(erp, sense);
1496 }
1497 /* 'Intervention Required' */
1498 if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) {
1499 erp_filled = dasd_3990_erp_int_req(erp);
1500 }
1501 /* 'Bus Out Parity Check' */
1502 if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) {
1503 erp_filled = dasd_3990_erp_bus_out(erp);
1504 }
1505 /* 'Equipment Check' */
1506 if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) {
1507 erp_filled = dasd_3990_erp_equip_check(erp, sense);
1508 }
1509 /* 'Data Check' */
1510 if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) {
1511 erp_filled = dasd_3990_erp_data_check(erp, sense);
1512 }
1513 /* 'Overrun' */
1514 if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) {
1515 erp_filled = dasd_3990_erp_overrun(erp, sense);
1516 }
1517 /* 'Invalid Track Format' */
1518 if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) {
1519 erp_filled = dasd_3990_erp_inv_format(erp, sense);
1520 }
1521 /* 'End-of-Cylinder' */
1522 if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) {
1523 erp_filled = dasd_3990_erp_EOC(erp, sense);
1524 }
1525 /* 'Environmental Data' */
1526 if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) {
1527 erp_filled = dasd_3990_erp_env_data(erp, sense);
1528 }
1529 /* 'No Record Found' */
1530 if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) {
1531 erp_filled = dasd_3990_erp_no_rec(erp, sense);
1532 }
1533 /* 'File Protected' */
1534 if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) {
1535 erp_filled = dasd_3990_erp_file_prot(erp);
1536 }
1537 /* other (unknown) error - do default ERP */
1538 if (erp_filled == NULL) {
1539
1540 erp_filled = erp;
1541 }
1542
1543 return erp_filled;
1544
1545 } /* END dasd_3990_erp_inspect_24 */
1546
1547 /*
1548 *****************************************************************************
1549 * 32 byte sense ERP functions (only)
1550 *****************************************************************************
1551 */
1552
1553 /*
1554 * DASD_3990_ERPACTION_10_32
1555 *
1556 * DESCRIPTION
1557 * Handles 32 byte 'Action 10' of Single Program Action Codes.
1558 * Just retry and if retry doesn't work, return with error.
1559 *
1560 * PARAMETER
1561 * erp current erp_head
1562 * sense current sense data
1563 * RETURN VALUES
1564 * erp modified erp_head
1565 */
1566 static struct dasd_ccw_req *
1567 dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense)
1568 {
1569
1570 struct dasd_device *device = erp->startdev;
1571
1572 erp->retries = 256;
1573 erp->function = dasd_3990_erp_action_10_32;
1574
1575 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Perform logging requested");
1576
1577 return erp;
1578
1579 } /* end dasd_3990_erp_action_10_32 */
1580
1581 /*
1582 * DASD_3990_ERP_ACTION_1B_32
1583 *
1584 * DESCRIPTION
1585 * Handles 32 byte 'Action 1B' of Single Program Action Codes.
1586 * A write operation could not be finished because of an unexpected
1587 * condition.
1588 * The already created 'default erp' is used to get the link to
1589 * the erp chain, but it can not be used for this recovery
1590 * action because it contains no DE/LO data space.
1591 *
1592 * PARAMETER
1593 * default_erp already added default erp.
1594 * sense current sense data
1595 *
1596 * RETURN VALUES
1597 * erp new erp or
1598 * default_erp in case of imprecise ending or error
1599 */
1600 static struct dasd_ccw_req *
1601 dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1602 {
1603
1604 struct dasd_device *device = default_erp->startdev;
1605 __u32 cpa = 0;
1606 struct dasd_ccw_req *cqr;
1607 struct dasd_ccw_req *erp;
1608 struct DE_eckd_data *DE_data;
1609 struct PFX_eckd_data *PFX_data;
1610 char *LO_data; /* LO_eckd_data_t */
1611 struct ccw1 *ccw, *oldccw;
1612
1613 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1614 "Write not finished because of unexpected condition");
1615
1616 default_erp->function = dasd_3990_erp_action_1B_32;
1617
1618 /* determine the original cqr */
1619 cqr = default_erp;
1620
1621 while (cqr->refers != NULL) {
1622 cqr = cqr->refers;
1623 }
1624
1625 if (scsw_is_tm(&cqr->irb.scsw)) {
1626 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1627 "32 bit sense, action 1B is not defined"
1628 " in transport mode - just retry");
1629 return default_erp;
1630 }
1631
1632 /* for imprecise ending just do default erp */
1633 if (sense[1] & 0x01) {
1634 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1635 "Imprecise ending is set - just retry");
1636
1637 return default_erp;
1638 }
1639
1640 /* determine the address of the CCW to be restarted */
1641 /* Imprecise ending is not set -> addr from IRB-SCSW */
1642 cpa = default_erp->refers->irb.scsw.cmd.cpa;
1643
1644 if (cpa == 0) {
1645 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1646 "Unable to determine address of the CCW "
1647 "to be restarted");
1648
1649 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1650 }
1651
1652 /* Build new ERP request including DE/LO */
1653 erp = dasd_alloc_erp_request((char *) &cqr->magic,
1654 2 + 1,/* DE/LO + TIC */
1655 sizeof(struct DE_eckd_data) +
1656 sizeof(struct LO_eckd_data), device);
1657
1658 if (IS_ERR(erp)) {
1659 /* internal error 01 - Unable to allocate ERP */
1660 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1661 "device driver, reason=%s\n", "01");
1662 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1663 }
1664
1665 /* use original DE */
1666 DE_data = erp->data;
1667 oldccw = cqr->cpaddr;
1668 if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) {
1669 PFX_data = cqr->data;
1670 memcpy(DE_data, &PFX_data->define_extent,
1671 sizeof(struct DE_eckd_data));
1672 } else
1673 memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data));
1674
1675 /* create LO */
1676 LO_data = erp->data + sizeof(struct DE_eckd_data);
1677
1678 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1679 /* should not */
1680 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1681 }
1682
1683 if ((sense[7] & 0x3F) == 0x01) {
1684 /* operation code is WRITE DATA -> data area orientation */
1685 LO_data[0] = 0x81;
1686
1687 } else if ((sense[7] & 0x3F) == 0x03) {
1688 /* operation code is FORMAT WRITE -> index orientation */
1689 LO_data[0] = 0xC3;
1690
1691 } else {
1692 LO_data[0] = sense[7]; /* operation */
1693 }
1694
1695 LO_data[1] = sense[8]; /* auxiliary */
1696 LO_data[2] = sense[9];
1697 LO_data[3] = sense[3]; /* count */
1698 LO_data[4] = sense[29]; /* seek_addr.cyl */
1699 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1700 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1701
1702 memcpy(&(LO_data[8]), &(sense[11]), 8);
1703
1704 /* create DE ccw */
1705 ccw = erp->cpaddr;
1706 memset(ccw, 0, sizeof(struct ccw1));
1707 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
1708 ccw->flags = CCW_FLAG_CC;
1709 ccw->count = 16;
1710 ccw->cda = (__u32)(addr_t) DE_data;
1711
1712 /* create LO ccw */
1713 ccw++;
1714 memset(ccw, 0, sizeof(struct ccw1));
1715 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
1716 ccw->flags = CCW_FLAG_CC;
1717 ccw->count = 16;
1718 ccw->cda = (__u32)(addr_t) LO_data;
1719
1720 /* TIC to the failed ccw */
1721 ccw++;
1722 ccw->cmd_code = CCW_CMD_TIC;
1723 ccw->cda = cpa;
1724
1725 /* fill erp related fields */
1726 erp->flags = default_erp->flags;
1727 erp->function = dasd_3990_erp_action_1B_32;
1728 erp->refers = default_erp->refers;
1729 erp->startdev = device;
1730 erp->memdev = device;
1731 erp->magic = default_erp->magic;
1732 erp->expires = default_erp->expires;
1733 erp->retries = 256;
1734 erp->buildclk = get_tod_clock();
1735 erp->status = DASD_CQR_FILLED;
1736
1737 /* remove the default erp */
1738 dasd_free_erp_request(default_erp, device);
1739
1740 return erp;
1741
1742 } /* end dasd_3990_erp_action_1B_32 */
1743
1744 /*
1745 * DASD_3990_UPDATE_1B
1746 *
1747 * DESCRIPTION
1748 * Handles the update to the 32 byte 'Action 1B' of Single Program
1749 * Action Codes in case the first action was not successful.
1750 * The already created 'previous_erp' is the currently not successful
1751 * ERP.
1752 *
1753 * PARAMETER
1754 * previous_erp already created previous erp.
1755 * sense current sense data
1756 * RETURN VALUES
1757 * erp modified erp
1758 */
1759 static struct dasd_ccw_req *
1760 dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
1761 {
1762
1763 struct dasd_device *device = previous_erp->startdev;
1764 __u32 cpa = 0;
1765 struct dasd_ccw_req *cqr;
1766 struct dasd_ccw_req *erp;
1767 char *LO_data; /* struct LO_eckd_data */
1768 struct ccw1 *ccw;
1769
1770 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1771 "Write not finished because of unexpected condition"
1772 " - follow on");
1773
1774 /* determine the original cqr */
1775 cqr = previous_erp;
1776
1777 while (cqr->refers != NULL) {
1778 cqr = cqr->refers;
1779 }
1780
1781 if (scsw_is_tm(&cqr->irb.scsw)) {
1782 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1783 "32 bit sense, action 1B, update,"
1784 " in transport mode - just retry");
1785 return previous_erp;
1786 }
1787
1788 /* for imprecise ending just do default erp */
1789 if (sense[1] & 0x01) {
1790 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1791 "Imprecise ending is set - just retry");
1792
1793 previous_erp->status = DASD_CQR_FILLED;
1794
1795 return previous_erp;
1796 }
1797
1798 /* determine the address of the CCW to be restarted */
1799 /* Imprecise ending is not set -> addr from IRB-SCSW */
1800 cpa = previous_erp->irb.scsw.cmd.cpa;
1801
1802 if (cpa == 0) {
1803 /* internal error 02 -
1804 Unable to determine address of the CCW to be restarted */
1805 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1806 "device driver, reason=%s\n", "02");
1807
1808 previous_erp->status = DASD_CQR_FAILED;
1809
1810 return previous_erp;
1811 }
1812
1813 erp = previous_erp;
1814
1815 /* update the LO with the new returned sense data */
1816 LO_data = erp->data + sizeof(struct DE_eckd_data);
1817
1818 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1819 /* should not happen */
1820 previous_erp->status = DASD_CQR_FAILED;
1821
1822 return previous_erp;
1823 }
1824
1825 if ((sense[7] & 0x3F) == 0x01) {
1826 /* operation code is WRITE DATA -> data area orientation */
1827 LO_data[0] = 0x81;
1828
1829 } else if ((sense[7] & 0x3F) == 0x03) {
1830 /* operation code is FORMAT WRITE -> index orientation */
1831 LO_data[0] = 0xC3;
1832
1833 } else {
1834 LO_data[0] = sense[7]; /* operation */
1835 }
1836
1837 LO_data[1] = sense[8]; /* auxiliary */
1838 LO_data[2] = sense[9];
1839 LO_data[3] = sense[3]; /* count */
1840 LO_data[4] = sense[29]; /* seek_addr.cyl */
1841 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1842 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1843
1844 memcpy(&(LO_data[8]), &(sense[11]), 8);
1845
1846 /* TIC to the failed ccw */
1847 ccw = erp->cpaddr; /* addr of DE ccw */
1848 ccw++; /* addr of LE ccw */
1849 ccw++; /* addr of TIC ccw */
1850 ccw->cda = cpa;
1851
1852 erp->status = DASD_CQR_FILLED;
1853
1854 return erp;
1855
1856 } /* end dasd_3990_update_1B */
1857
1858 /*
1859 * DASD_3990_ERP_COMPOUND_RETRY
1860 *
1861 * DESCRIPTION
1862 * Handles the compound ERP action retry code.
1863 * NOTE: At least one retry is done even if zero is specified
1864 * by the sense data. This makes enqueueing of the request
1865 * easier.
1866 *
1867 * PARAMETER
1868 * sense sense data of the actual error
1869 * erp pointer to the currently created ERP
1870 *
1871 * RETURN VALUES
1872 * erp modified ERP pointer
1873 *
1874 */
1875 static void
1876 dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense)
1877 {
1878
1879 switch (sense[25] & 0x03) {
1880 case 0x00: /* no not retry */
1881 erp->retries = 1;
1882 break;
1883
1884 case 0x01: /* retry 2 times */
1885 erp->retries = 2;
1886 break;
1887
1888 case 0x02: /* retry 10 times */
1889 erp->retries = 10;
1890 break;
1891
1892 case 0x03: /* retry 256 times */
1893 erp->retries = 256;
1894 break;
1895
1896 default:
1897 BUG();
1898 }
1899
1900 erp->function = dasd_3990_erp_compound_retry;
1901
1902 } /* end dasd_3990_erp_compound_retry */
1903
1904 /*
1905 * DASD_3990_ERP_COMPOUND_PATH
1906 *
1907 * DESCRIPTION
1908 * Handles the compound ERP action for retry on alternate
1909 * channel path.
1910 *
1911 * PARAMETER
1912 * sense sense data of the actual error
1913 * erp pointer to the currently created ERP
1914 *
1915 * RETURN VALUES
1916 * erp modified ERP pointer
1917 *
1918 */
1919 static void
1920 dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
1921 {
1922 if (sense[25] & DASD_SENSE_BIT_3) {
1923 dasd_3990_erp_alternate_path(erp);
1924
1925 if (erp->status == DASD_CQR_FAILED &&
1926 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
1927 /* reset the lpm and the status to be able to
1928 * try further actions. */
1929 erp->lpm = erp->startdev->path_data.opm;
1930 erp->status = DASD_CQR_NEED_ERP;
1931 }
1932 }
1933
1934 erp->function = dasd_3990_erp_compound_path;
1935
1936 } /* end dasd_3990_erp_compound_path */
1937
1938 /*
1939 * DASD_3990_ERP_COMPOUND_CODE
1940 *
1941 * DESCRIPTION
1942 * Handles the compound ERP action for retry code.
1943 *
1944 * PARAMETER
1945 * sense sense data of the actual error
1946 * erp pointer to the currently created ERP
1947 *
1948 * RETURN VALUES
1949 * erp NEW ERP pointer
1950 *
1951 */
1952 static struct dasd_ccw_req *
1953 dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense)
1954 {
1955
1956 if (sense[25] & DASD_SENSE_BIT_2) {
1957
1958 switch (sense[28]) {
1959 case 0x17:
1960 /* issue a Diagnostic Control command with an
1961 * Inhibit Write subcommand and controller modifier */
1962 erp = dasd_3990_erp_DCTL(erp, 0x20);
1963 break;
1964
1965 case 0x25:
1966 /* wait for 5 seconds and retry again */
1967 erp->retries = 1;
1968
1969 dasd_3990_erp_block_queue (erp, 5*HZ);
1970 break;
1971
1972 default:
1973 /* should not happen - continue */
1974 break;
1975 }
1976 }
1977
1978 erp->function = dasd_3990_erp_compound_code;
1979
1980 return erp;
1981
1982 } /* end dasd_3990_erp_compound_code */
1983
1984 /*
1985 * DASD_3990_ERP_COMPOUND_CONFIG
1986 *
1987 * DESCRIPTION
1988 * Handles the compound ERP action for configruation
1989 * dependent error.
1990 * Note: duplex handling is not implemented (yet).
1991 *
1992 * PARAMETER
1993 * sense sense data of the actual error
1994 * erp pointer to the currently created ERP
1995 *
1996 * RETURN VALUES
1997 * erp modified ERP pointer
1998 *
1999 */
2000 static void
2001 dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
2002 {
2003
2004 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) {
2005
2006 /* set to suspended duplex state then restart
2007 internal error 05 - Set device to suspended duplex state
2008 should be done */
2009 struct dasd_device *device = erp->startdev;
2010 dev_err(&device->cdev->dev,
2011 "An error occurred in the DASD device driver, "
2012 "reason=%s\n", "05");
2013
2014 }
2015
2016 erp->function = dasd_3990_erp_compound_config;
2017
2018 } /* end dasd_3990_erp_compound_config */
2019
2020 /*
2021 * DASD_3990_ERP_COMPOUND
2022 *
2023 * DESCRIPTION
2024 * Does the further compound program action if
2025 * compound retry was not successful.
2026 *
2027 * PARAMETER
2028 * sense sense data of the actual error
2029 * erp pointer to the current (failed) ERP
2030 *
2031 * RETURN VALUES
2032 * erp (additional) ERP pointer
2033 *
2034 */
2035 static struct dasd_ccw_req *
2036 dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense)
2037 {
2038
2039 if ((erp->function == dasd_3990_erp_compound_retry) &&
2040 (erp->status == DASD_CQR_NEED_ERP)) {
2041
2042 dasd_3990_erp_compound_path(erp, sense);
2043 }
2044
2045 if ((erp->function == dasd_3990_erp_compound_path) &&
2046 (erp->status == DASD_CQR_NEED_ERP)) {
2047
2048 erp = dasd_3990_erp_compound_code(erp, sense);
2049 }
2050
2051 if ((erp->function == dasd_3990_erp_compound_code) &&
2052 (erp->status == DASD_CQR_NEED_ERP)) {
2053
2054 dasd_3990_erp_compound_config(erp, sense);
2055 }
2056
2057 /* if no compound action ERP specified, the request failed */
2058 if (erp->status == DASD_CQR_NEED_ERP)
2059 erp->status = DASD_CQR_FAILED;
2060
2061 return erp;
2062
2063 } /* end dasd_3990_erp_compound */
2064
2065 /*
2066 *DASD_3990_ERP_HANDLE_SIM
2067 *
2068 *DESCRIPTION
2069 * inspects the SIM SENSE data and starts an appropriate action
2070 *
2071 * PARAMETER
2072 * sense sense data of the actual error
2073 *
2074 * RETURN VALUES
2075 * none
2076 */
2077 void
2078 dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense)
2079 {
2080 /* print message according to log or message to operator mode */
2081 if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) {
2082 /* print SIM SRC from RefCode */
2083 dev_err(&device->cdev->dev, "SIM - SRC: "
2084 "%02x%02x%02x%02x\n", sense[22],
2085 sense[23], sense[11], sense[12]);
2086 } else if (sense[24] & DASD_SIM_LOG) {
2087 /* print SIM SRC Refcode */
2088 dev_warn(&device->cdev->dev, "log SIM - SRC: "
2089 "%02x%02x%02x%02x\n", sense[22],
2090 sense[23], sense[11], sense[12]);
2091 }
2092 }
2093
2094 /*
2095 * DASD_3990_ERP_INSPECT_32
2096 *
2097 * DESCRIPTION
2098 * Does a detailed inspection of the 32 byte sense data
2099 * and sets up a related error recovery action.
2100 *
2101 * PARAMETER
2102 * sense sense data of the actual error
2103 * erp pointer to the currently created default ERP
2104 *
2105 * RETURN VALUES
2106 * erp_filled pointer to the ERP
2107 *
2108 */
2109 static struct dasd_ccw_req *
2110 dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
2111 {
2112
2113 struct dasd_device *device = erp->startdev;
2114
2115 erp->function = dasd_3990_erp_inspect_32;
2116
2117 /* check for SIM sense data */
2118 if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)
2119 dasd_3990_erp_handle_sim(device, sense);
2120
2121 if (sense[25] & DASD_SENSE_BIT_0) {
2122
2123 /* compound program action codes (byte25 bit 0 == '1') */
2124 dasd_3990_erp_compound_retry(erp, sense);
2125
2126 } else {
2127
2128 /* single program action codes (byte25 bit 0 == '0') */
2129 switch (sense[25]) {
2130
2131 case 0x00: /* success - use default ERP for retries */
2132 DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
2133 "ERP called for successful request"
2134 " - just retry");
2135 break;
2136
2137 case 0x01: /* fatal error */
2138 dev_err(&device->cdev->dev,
2139 "ERP failed for the DASD\n");
2140
2141 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2142 break;
2143
2144 case 0x02: /* intervention required */
2145 case 0x03: /* intervention required during dual copy */
2146 erp = dasd_3990_erp_int_req(erp);
2147 break;
2148
2149 case 0x0F: /* length mismatch during update write command
2150 internal error 08 - update write command error*/
2151 dev_err(&device->cdev->dev, "An error occurred in the "
2152 "DASD device driver, reason=%s\n", "08");
2153
2154 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2155 break;
2156
2157 case 0x10: /* logging required for other channel program */
2158 erp = dasd_3990_erp_action_10_32(erp, sense);
2159 break;
2160
2161 case 0x15: /* next track outside defined extend
2162 internal error 07 - The next track is not
2163 within the defined storage extent */
2164 dev_err(&device->cdev->dev,
2165 "An error occurred in the DASD device driver, "
2166 "reason=%s\n", "07");
2167
2168 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2169 break;
2170
2171 case 0x1B: /* unexpected condition during write */
2172
2173 erp = dasd_3990_erp_action_1B_32(erp, sense);
2174 break;
2175
2176 case 0x1C: /* invalid data */
2177 dev_emerg(&device->cdev->dev,
2178 "Data recovered during retry with PCI "
2179 "fetch mode active\n");
2180
2181 /* not possible to handle this situation in Linux */
2182 panic
2183 ("Invalid data - No way to inform application "
2184 "about the possibly incorrect data");
2185 break;
2186
2187 case 0x1D: /* state-change pending */
2188 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2189 "A State change pending condition exists "
2190 "for the subsystem or device");
2191
2192 erp = dasd_3990_erp_action_4(erp, sense);
2193 break;
2194
2195 case 0x1E: /* busy */
2196 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2197 "Busy condition exists "
2198 "for the subsystem or device");
2199 erp = dasd_3990_erp_action_4(erp, sense);
2200 break;
2201
2202 default: /* all others errors - default erp */
2203 break;
2204 }
2205 }
2206
2207 return erp;
2208
2209 } /* end dasd_3990_erp_inspect_32 */
2210
2211 /*
2212 *****************************************************************************
2213 * main ERP control functions (24 and 32 byte sense)
2214 *****************************************************************************
2215 */
2216
2217 /*
2218 * DASD_3990_ERP_CONTROL_CHECK
2219 *
2220 * DESCRIPTION
2221 * Does a generic inspection if a control check occurred and sets up
2222 * the related error recovery procedure
2223 *
2224 * PARAMETER
2225 * erp pointer to the currently created default ERP
2226 *
2227 * RETURN VALUES
2228 * erp_filled pointer to the erp
2229 */
2230
2231 static struct dasd_ccw_req *
2232 dasd_3990_erp_control_check(struct dasd_ccw_req *erp)
2233 {
2234 struct dasd_device *device = erp->startdev;
2235
2236 if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK
2237 | SCHN_STAT_CHN_CTRL_CHK)) {
2238 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2239 "channel or interface control check");
2240 erp = dasd_3990_erp_action_4(erp, NULL);
2241 }
2242 return erp;
2243 }
2244
2245 /*
2246 * DASD_3990_ERP_INSPECT
2247 *
2248 * DESCRIPTION
2249 * Does a detailed inspection for sense data by calling either
2250 * the 24-byte or the 32-byte inspection routine.
2251 *
2252 * PARAMETER
2253 * erp pointer to the currently created default ERP
2254 * RETURN VALUES
2255 * erp_new contens was possibly modified
2256 */
2257 static struct dasd_ccw_req *
2258 dasd_3990_erp_inspect(struct dasd_ccw_req *erp)
2259 {
2260
2261 struct dasd_ccw_req *erp_new = NULL;
2262 char *sense;
2263
2264 /* if this problem occurred on an alias retry on base */
2265 erp_new = dasd_3990_erp_inspect_alias(erp);
2266 if (erp_new)
2267 return erp_new;
2268
2269 /* sense data are located in the refers record of the
2270 * already set up new ERP !
2271 * check if concurrent sens is available
2272 */
2273 sense = dasd_get_sense(&erp->refers->irb);
2274 if (!sense)
2275 erp_new = dasd_3990_erp_control_check(erp);
2276 /* distinguish between 24 and 32 byte sense data */
2277 else if (sense[27] & DASD_SENSE_BIT_0) {
2278
2279 /* inspect the 24 byte sense data */
2280 erp_new = dasd_3990_erp_inspect_24(erp, sense);
2281
2282 } else {
2283
2284 /* inspect the 32 byte sense data */
2285 erp_new = dasd_3990_erp_inspect_32(erp, sense);
2286
2287 } /* end distinguish between 24 and 32 byte sense data */
2288
2289 return erp_new;
2290 }
2291
2292 /*
2293 * DASD_3990_ERP_ADD_ERP
2294 *
2295 * DESCRIPTION
2296 * This function adds an additional request block (ERP) to the head of
2297 * the given cqr (or erp).
2298 * For a command mode cqr the erp is initialized as an default erp
2299 * (retry TIC).
2300 * For transport mode we make a copy of the original TCW (points to
2301 * the original TCCB, TIDALs, etc.) but give it a fresh
2302 * TSB so the original sense data will not be changed.
2303 *
2304 * PARAMETER
2305 * cqr head of the current ERP-chain (or single cqr if
2306 * first error)
2307 * RETURN VALUES
2308 * erp pointer to new ERP-chain head
2309 */
2310 static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr)
2311 {
2312
2313 struct dasd_device *device = cqr->startdev;
2314 struct ccw1 *ccw;
2315 struct dasd_ccw_req *erp;
2316 int cplength, datasize;
2317 struct tcw *tcw;
2318 struct tsb *tsb;
2319
2320 if (cqr->cpmode == 1) {
2321 cplength = 0;
2322 /* TCW needs to be 64 byte aligned, so leave enough room */
2323 datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb);
2324 } else {
2325 cplength = 2;
2326 datasize = 0;
2327 }
2328
2329 /* allocate additional request block */
2330 erp = dasd_alloc_erp_request((char *) &cqr->magic,
2331 cplength, datasize, device);
2332 if (IS_ERR(erp)) {
2333 if (cqr->retries <= 0) {
2334 DBF_DEV_EVENT(DBF_ERR, device, "%s",
2335 "Unable to allocate ERP request");
2336 cqr->status = DASD_CQR_FAILED;
2337 cqr->stopclk = get_tod_clock();
2338 } else {
2339 DBF_DEV_EVENT(DBF_ERR, device,
2340 "Unable to allocate ERP request "
2341 "(%i retries left)",
2342 cqr->retries);
2343 dasd_block_set_timer(device->block, (HZ << 3));
2344 }
2345 return erp;
2346 }
2347
2348 ccw = cqr->cpaddr;
2349 if (cqr->cpmode == 1) {
2350 /* make a shallow copy of the original tcw but set new tsb */
2351 erp->cpmode = 1;
2352 erp->cpaddr = PTR_ALIGN(erp->data, 64);
2353 tcw = erp->cpaddr;
2354 tsb = (struct tsb *) &tcw[1];
2355 *tcw = *((struct tcw *)cqr->cpaddr);
2356 tcw->tsb = (long)tsb;
2357 } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) {
2358 /* PSF cannot be chained from NOOP/TIC */
2359 erp->cpaddr = cqr->cpaddr;
2360 } else {
2361 /* initialize request with default TIC to current ERP/CQR */
2362 ccw = erp->cpaddr;
2363 ccw->cmd_code = CCW_CMD_NOOP;
2364 ccw->flags = CCW_FLAG_CC;
2365 ccw++;
2366 ccw->cmd_code = CCW_CMD_TIC;
2367 ccw->cda = (long)(cqr->cpaddr);
2368 }
2369
2370 erp->flags = cqr->flags;
2371 erp->function = dasd_3990_erp_add_erp;
2372 erp->refers = cqr;
2373 erp->startdev = device;
2374 erp->memdev = device;
2375 erp->block = cqr->block;
2376 erp->magic = cqr->magic;
2377 erp->expires = cqr->expires;
2378 erp->retries = 256;
2379 erp->buildclk = get_tod_clock();
2380 erp->status = DASD_CQR_FILLED;
2381
2382 return erp;
2383 }
2384
2385 /*
2386 * DASD_3990_ERP_ADDITIONAL_ERP
2387 *
2388 * DESCRIPTION
2389 * An additional ERP is needed to handle the current error.
2390 * Add ERP to the head of the ERP-chain containing the ERP processing
2391 * determined based on the sense data.
2392 *
2393 * PARAMETER
2394 * cqr head of the current ERP-chain (or single cqr if
2395 * first error)
2396 *
2397 * RETURN VALUES
2398 * erp pointer to new ERP-chain head
2399 */
2400 static struct dasd_ccw_req *
2401 dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr)
2402 {
2403
2404 struct dasd_ccw_req *erp = NULL;
2405
2406 /* add erp and initialize with default TIC */
2407 erp = dasd_3990_erp_add_erp(cqr);
2408
2409 if (IS_ERR(erp))
2410 return erp;
2411
2412 /* inspect sense, determine specific ERP if possible */
2413 if (erp != cqr) {
2414
2415 erp = dasd_3990_erp_inspect(erp);
2416 }
2417
2418 return erp;
2419
2420 } /* end dasd_3990_erp_additional_erp */
2421
2422 /*
2423 * DASD_3990_ERP_ERROR_MATCH
2424 *
2425 * DESCRIPTION
2426 * Check if the device status of the given cqr is the same.
2427 * This means that the failed CCW and the relevant sense data
2428 * must match.
2429 * I don't distinguish between 24 and 32 byte sense because in case of
2430 * 24 byte sense byte 25 and 27 is set as well.
2431 *
2432 * PARAMETER
2433 * cqr1 first cqr, which will be compared with the
2434 * cqr2 second cqr.
2435 *
2436 * RETURN VALUES
2437 * match 'boolean' for match found
2438 * returns 1 if match found, otherwise 0.
2439 */
2440 static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1,
2441 struct dasd_ccw_req *cqr2)
2442 {
2443 char *sense1, *sense2;
2444
2445 if (cqr1->startdev != cqr2->startdev)
2446 return 0;
2447
2448 sense1 = dasd_get_sense(&cqr1->irb);
2449 sense2 = dasd_get_sense(&cqr2->irb);
2450
2451 /* one request has sense data, the other not -> no match, return 0 */
2452 if (!sense1 != !sense2)
2453 return 0;
2454 /* no sense data in both cases -> check cstat for IFCC */
2455 if (!sense1 && !sense2) {
2456 if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
2457 SCHN_STAT_CHN_CTRL_CHK)) ==
2458 (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
2459 SCHN_STAT_CHN_CTRL_CHK)))
2460 return 1; /* match with ifcc*/
2461 }
2462 /* check sense data; byte 0-2,25,27 */
2463 if (!(sense1 && sense2 &&
2464 (memcmp(sense1, sense2, 3) == 0) &&
2465 (sense1[27] == sense2[27]) &&
2466 (sense1[25] == sense2[25]))) {
2467
2468 return 0; /* sense doesn't match */
2469 }
2470
2471 return 1; /* match */
2472
2473 } /* end dasd_3990_erp_error_match */
2474
2475 /*
2476 * DASD_3990_ERP_IN_ERP
2477 *
2478 * DESCRIPTION
2479 * check if the current error already happened before.
2480 * quick exit if current cqr is not an ERP (cqr->refers=NULL)
2481 *
2482 * PARAMETER
2483 * cqr failed cqr (either original cqr or already an erp)
2484 *
2485 * RETURN VALUES
2486 * erp erp-pointer to the already defined error
2487 * recovery procedure OR
2488 * NULL if a 'new' error occurred.
2489 */
2490 static struct dasd_ccw_req *
2491 dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr)
2492 {
2493
2494 struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */
2495 *erp_match = NULL; /* save erp chain head */
2496 int match = 0; /* 'boolean' for matching error found */
2497
2498 if (cqr->refers == NULL) { /* return if not in erp */
2499 return NULL;
2500 }
2501
2502 /* check the erp/cqr chain for current error */
2503 do {
2504 match = dasd_3990_erp_error_match(erp_head, cqr->refers);
2505 erp_match = cqr; /* save possible matching erp */
2506 cqr = cqr->refers; /* check next erp/cqr in queue */
2507
2508 } while ((cqr->refers != NULL) && (!match));
2509
2510 if (!match) {
2511 return NULL; /* no match was found */
2512 }
2513
2514 return erp_match; /* return address of matching erp */
2515
2516 } /* END dasd_3990_erp_in_erp */
2517
2518 /*
2519 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense)
2520 *
2521 * DESCRIPTION
2522 * No retry is left for the current ERP. Check what has to be done
2523 * with the ERP.
2524 * - do further defined ERP action or
2525 * - wait for interrupt or
2526 * - exit with permanent error
2527 *
2528 * PARAMETER
2529 * erp ERP which is in progress with no retry left
2530 *
2531 * RETURN VALUES
2532 * erp modified/additional ERP
2533 */
2534 static struct dasd_ccw_req *
2535 dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
2536 {
2537
2538 struct dasd_device *device = erp->startdev;
2539 char *sense = dasd_get_sense(&erp->irb);
2540
2541 /* check for 24 byte sense ERP */
2542 if ((erp->function == dasd_3990_erp_bus_out) ||
2543 (erp->function == dasd_3990_erp_action_1) ||
2544 (erp->function == dasd_3990_erp_action_4)) {
2545
2546 erp = dasd_3990_erp_action_1(erp);
2547
2548 } else if (erp->function == dasd_3990_erp_action_1_sec) {
2549 erp = dasd_3990_erp_action_1_sec(erp);
2550 } else if (erp->function == dasd_3990_erp_action_5) {
2551
2552 /* retries have not been successful */
2553 /* prepare erp for retry on different channel path */
2554 erp = dasd_3990_erp_action_1(erp);
2555
2556 if (sense && !(sense[2] & DASD_SENSE_BIT_0)) {
2557
2558 /* issue a Diagnostic Control command with an
2559 * Inhibit Write subcommand */
2560
2561 switch (sense[25]) {
2562 case 0x17:
2563 case 0x57:{ /* controller */
2564 erp = dasd_3990_erp_DCTL(erp, 0x20);
2565 break;
2566 }
2567 case 0x18:
2568 case 0x58:{ /* channel path */
2569 erp = dasd_3990_erp_DCTL(erp, 0x40);
2570 break;
2571 }
2572 case 0x19:
2573 case 0x59:{ /* storage director */
2574 erp = dasd_3990_erp_DCTL(erp, 0x80);
2575 break;
2576 }
2577 default:
2578 DBF_DEV_EVENT(DBF_WARNING, device,
2579 "invalid subcommand modifier 0x%x "
2580 "for Diagnostic Control Command",
2581 sense[25]);
2582 }
2583 }
2584
2585 /* check for 32 byte sense ERP */
2586 } else if (sense &&
2587 ((erp->function == dasd_3990_erp_compound_retry) ||
2588 (erp->function == dasd_3990_erp_compound_path) ||
2589 (erp->function == dasd_3990_erp_compound_code) ||
2590 (erp->function == dasd_3990_erp_compound_config))) {
2591
2592 erp = dasd_3990_erp_compound(erp, sense);
2593
2594 } else {
2595 /*
2596 * No retry left and no additional special handling
2597 * necessary
2598 */
2599 dev_err(&device->cdev->dev,
2600 "ERP %p has run out of retries and failed\n", erp);
2601
2602 erp->status = DASD_CQR_FAILED;
2603 }
2604
2605 return erp;
2606
2607 } /* end dasd_3990_erp_further_erp */
2608
2609 /*
2610 * DASD_3990_ERP_HANDLE_MATCH_ERP
2611 *
2612 * DESCRIPTION
2613 * An error occurred again and an ERP has been detected which is already
2614 * used to handle this error (e.g. retries).
2615 * All prior ERP's are asumed to be successful and therefore removed
2616 * from queue.
2617 * If retry counter of matching erp is already 0, it is checked if further
2618 * action is needed (besides retry) or if the ERP has failed.
2619 *
2620 * PARAMETER
2621 * erp_head first ERP in ERP-chain
2622 * erp ERP that handles the actual error.
2623 * (matching erp)
2624 *
2625 * RETURN VALUES
2626 * erp modified/additional ERP
2627 */
2628 static struct dasd_ccw_req *
2629 dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
2630 struct dasd_ccw_req *erp)
2631 {
2632
2633 struct dasd_device *device = erp_head->startdev;
2634 struct dasd_ccw_req *erp_done = erp_head; /* finished req */
2635 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */
2636
2637 /* loop over successful ERPs and remove them from chanq */
2638 while (erp_done != erp) {
2639
2640 if (erp_done == NULL) /* end of chain reached */
2641 panic(PRINTK_HEADER "Programming error in ERP! The "
2642 "original request was lost\n");
2643
2644 /* remove the request from the device queue */
2645 list_del(&erp_done->blocklist);
2646
2647 erp_free = erp_done;
2648 erp_done = erp_done->refers;
2649
2650 /* free the finished erp request */
2651 dasd_free_erp_request(erp_free, erp_free->memdev);
2652
2653 } /* end while */
2654
2655 if (erp->retries > 0) {
2656
2657 char *sense = dasd_get_sense(&erp->refers->irb);
2658
2659 /* check for special retries */
2660 if (sense && erp->function == dasd_3990_erp_action_4) {
2661
2662 erp = dasd_3990_erp_action_4(erp, sense);
2663
2664 } else if (sense &&
2665 erp->function == dasd_3990_erp_action_1B_32) {
2666
2667 erp = dasd_3990_update_1B(erp, sense);
2668
2669 } else if (sense && erp->function == dasd_3990_erp_int_req) {
2670
2671 erp = dasd_3990_erp_int_req(erp);
2672
2673 } else {
2674 /* simple retry */
2675 DBF_DEV_EVENT(DBF_DEBUG, device,
2676 "%i retries left for erp %p",
2677 erp->retries, erp);
2678
2679 /* handle the request again... */
2680 erp->status = DASD_CQR_FILLED;
2681 }
2682
2683 } else {
2684 /* no retry left - check for further necessary action */
2685 /* if no further actions, handle rest as permanent error */
2686 erp = dasd_3990_erp_further_erp(erp);
2687 }
2688
2689 return erp;
2690
2691 } /* end dasd_3990_erp_handle_match_erp */
2692
2693 /*
2694 * DASD_3990_ERP_ACTION
2695 *
2696 * DESCRIPTION
2697 * control routine for 3990 erp actions.
2698 * Has to be called with the queue lock (namely the s390_irq_lock) acquired.
2699 *
2700 * PARAMETER
2701 * cqr failed cqr (either original cqr or already an erp)
2702 *
2703 * RETURN VALUES
2704 * erp erp-pointer to the head of the ERP action chain.
2705 * This means:
2706 * - either a ptr to an additional ERP cqr or
2707 * - the original given cqr (which's status might
2708 * be modified)
2709 */
2710 struct dasd_ccw_req *
2711 dasd_3990_erp_action(struct dasd_ccw_req * cqr)
2712 {
2713 struct dasd_ccw_req *erp = NULL;
2714 struct dasd_device *device = cqr->startdev;
2715 struct dasd_ccw_req *temp_erp = NULL;
2716
2717 if (device->features & DASD_FEATURE_ERPLOG) {
2718 /* print current erp_chain */
2719 dev_err(&device->cdev->dev,
2720 "ERP chain at BEGINNING of ERP-ACTION\n");
2721 for (temp_erp = cqr;
2722 temp_erp != NULL; temp_erp = temp_erp->refers) {
2723
2724 dev_err(&device->cdev->dev,
2725 "ERP %p (%02x) refers to %p\n",
2726 temp_erp, temp_erp->status,
2727 temp_erp->refers);
2728 }
2729 }
2730
2731 /* double-check if current erp/cqr was successful */
2732 if ((scsw_cstat(&cqr->irb.scsw) == 0x00) &&
2733 (scsw_dstat(&cqr->irb.scsw) ==
2734 (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) {
2735
2736 DBF_DEV_EVENT(DBF_DEBUG, device,
2737 "ERP called for successful request %p"
2738 " - NO ERP necessary", cqr);
2739
2740 cqr->status = DASD_CQR_DONE;
2741
2742 return cqr;
2743 }
2744
2745 /* check if error happened before */
2746 erp = dasd_3990_erp_in_erp(cqr);
2747
2748 if (erp == NULL) {
2749 /* no matching erp found - set up erp */
2750 erp = dasd_3990_erp_additional_erp(cqr);
2751 if (IS_ERR(erp))
2752 return erp;
2753 } else {
2754 /* matching erp found - set all leading erp's to DONE */
2755 erp = dasd_3990_erp_handle_match_erp(cqr, erp);
2756 }
2757
2758 if (device->features & DASD_FEATURE_ERPLOG) {
2759 /* print current erp_chain */
2760 dev_err(&device->cdev->dev,
2761 "ERP chain at END of ERP-ACTION\n");
2762 for (temp_erp = erp;
2763 temp_erp != NULL; temp_erp = temp_erp->refers) {
2764
2765 dev_err(&device->cdev->dev,
2766 "ERP %p (%02x) refers to %p\n",
2767 temp_erp, temp_erp->status,
2768 temp_erp->refers);
2769 }
2770 }
2771
2772 /* enqueue ERP request if it's a new one */
2773 if (list_empty(&erp->blocklist)) {
2774 cqr->status = DASD_CQR_IN_ERP;
2775 /* add erp request before the cqr */
2776 list_add_tail(&erp->blocklist, &cqr->blocklist);
2777 }
2778
2779
2780
2781 return erp;
2782
2783 } /* end dasd_3990_erp_action */
Linux kernel - Deliverables
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