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