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V4L/DVB (6715): ivtv: Remove unnecessary register update
[linux-2.6/verdex.git] / drivers / s390 / block / dasd_3990_erp.c
blob5b7385e430ea6b64c6970ec4bf275a89a8bb3285
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 #include <linux/timer.h>
11 #include <linux/slab.h>
12 #include <asm/idals.h>
13 #include <asm/todclk.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 EXAMINATION
30 *****************************************************************************
31 */
32
33 /*
34 * DASD_3990_ERP_EXAMINE_24
35 *
36 * DESCRIPTION
37 * Checks only for fatal (unrecoverable) error.
38 * A detailed examination of the sense data is done later outside
39 * the interrupt handler.
40 *
41 * Each bit configuration leading to an action code 2 (Exit with
42 * programming error or unusual condition indication)
43 * are handled as fatal errors.
44 *
45 * All other configurations are handled as recoverable errors.
46 *
47 * RETURN VALUES
48 * dasd_era_fatal for all fatal (unrecoverable errors)
49 * dasd_era_recover for all others.
50 */
51 static dasd_era_t
52 dasd_3990_erp_examine_24(struct dasd_ccw_req * cqr, char *sense)
53 {
54
55 struct dasd_device *device = cqr->device;
56
57 /* check for 'Command Reject' */
58 if ((sense[0] & SNS0_CMD_REJECT) &&
59 (!(sense[2] & SNS2_ENV_DATA_PRESENT))) {
60
61 DEV_MESSAGE(KERN_ERR, device, "%s",
62 "EXAMINE 24: Command Reject detected - "
63 "fatal error");
64
65 return dasd_era_fatal;
66 }
67
68 /* check for 'Invalid Track Format' */
69 if ((sense[1] & SNS1_INV_TRACK_FORMAT) &&
70 (!(sense[2] & SNS2_ENV_DATA_PRESENT))) {
71
72 DEV_MESSAGE(KERN_ERR, device, "%s",
73 "EXAMINE 24: Invalid Track Format detected "
74 "- fatal error");
75
76 return dasd_era_fatal;
77 }
78
79 /* check for 'No Record Found' */
80 if (sense[1] & SNS1_NO_REC_FOUND) {
81
82 /* FIXME: fatal error ?!? */
83 DEV_MESSAGE(KERN_ERR, device,
84 "EXAMINE 24: No Record Found detected %s",
85 device->state <= DASD_STATE_BASIC ?
86 " " : "- fatal error");
87
88 return dasd_era_fatal;
89 }
90
91 /* return recoverable for all others */
92 return dasd_era_recover;
93 } /* END dasd_3990_erp_examine_24 */
94
95 /*
96 * DASD_3990_ERP_EXAMINE_32
97 *
98 * DESCRIPTION
99 * Checks only for fatal/no/recoverable error.
100 * A detailed examination of the sense data is done later outside
101 * the interrupt handler.
102 *
103 * RETURN VALUES
104 * dasd_era_none no error
105 * dasd_era_fatal for all fatal (unrecoverable errors)
106 * dasd_era_recover for recoverable others.
107 */
108 static dasd_era_t
109 dasd_3990_erp_examine_32(struct dasd_ccw_req * cqr, char *sense)
110 {
111
112 struct dasd_device *device = cqr->device;
113
114 switch (sense[25]) {
115 case 0x00:
116 return dasd_era_none;
117
118 case 0x01:
119 DEV_MESSAGE(KERN_ERR, device, "%s", "EXAMINE 32: fatal error");
120
121 return dasd_era_fatal;
122
123 default:
124
125 return dasd_era_recover;
126 }
127
128 } /* end dasd_3990_erp_examine_32 */
129
130 /*
131 * DASD_3990_ERP_EXAMINE
132 *
133 * DESCRIPTION
134 * Checks only for fatal/no/recover error.
135 * A detailed examination of the sense data is done later outside
136 * the interrupt handler.
137 *
138 * The logic is based on the 'IBM 3990 Storage Control Reference' manual
139 * 'Chapter 7. Error Recovery Procedures'.
140 *
141 * RETURN VALUES
142 * dasd_era_none no error
143 * dasd_era_fatal for all fatal (unrecoverable errors)
144 * dasd_era_recover for all others.
145 */
146 dasd_era_t
147 dasd_3990_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb)
148 {
149
150 char *sense = irb->ecw;
151 dasd_era_t era = dasd_era_recover;
152 struct dasd_device *device = cqr->device;
153
154 /* check for successful execution first */
155 if (irb->scsw.cstat == 0x00 &&
156 irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
157 return dasd_era_none;
158
159 /* distinguish between 24 and 32 byte sense data */
160 if (sense[27] & DASD_SENSE_BIT_0) {
161
162 era = dasd_3990_erp_examine_24(cqr, sense);
163
164 } else {
165
166 era = dasd_3990_erp_examine_32(cqr, sense);
167
168 }
169
170 /* log the erp chain if fatal error occurred */
171 if ((era == dasd_era_fatal) && (device->state >= DASD_STATE_READY)) {
172 dasd_log_sense(cqr, irb);
173 }
174
175 return era;
176
177 } /* END dasd_3990_erp_examine */
178
179 /*
180 *****************************************************************************
181 * SECTION ERP HANDLING
182 *****************************************************************************
183 */
184 /*
185 *****************************************************************************
186 * 24 and 32 byte sense ERP functions
187 *****************************************************************************
188 */
189
190 /*
191 * DASD_3990_ERP_CLEANUP
192 *
193 * DESCRIPTION
194 * Removes the already build but not necessary ERP request and sets
195 * the status of the original cqr / erp to the given (final) status
196 *
197 * PARAMETER
198 * erp request to be blocked
199 * final_status either DASD_CQR_DONE or DASD_CQR_FAILED
200 *
201 * RETURN VALUES
202 * cqr original cqr
203 */
204 static struct dasd_ccw_req *
205 dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status)
206 {
207 struct dasd_ccw_req *cqr = erp->refers;
208
209 dasd_free_erp_request(erp, erp->device);
210 cqr->status = final_status;
211 return cqr;
212
213 } /* end dasd_3990_erp_cleanup */
214
215 /*
216 * DASD_3990_ERP_BLOCK_QUEUE
217 *
218 * DESCRIPTION
219 * Block the given device request queue to prevent from further
220 * processing until the started timer has expired or an related
221 * interrupt was received.
222 */
223 static void
224 dasd_3990_erp_block_queue(struct dasd_ccw_req * erp, int expires)
225 {
226
227 struct dasd_device *device = erp->device;
228
229 DEV_MESSAGE(KERN_INFO, device,
230 "blocking request queue for %is", expires/HZ);
231
232 device->stopped |= DASD_STOPPED_PENDING;
233 erp->status = DASD_CQR_QUEUED;
234
235 dasd_set_timer(device, expires);
236 }
237
238 /*
239 * DASD_3990_ERP_INT_REQ
240 *
241 * DESCRIPTION
242 * Handles 'Intervention Required' error.
243 * This means either device offline or not installed.
244 *
245 * PARAMETER
246 * erp current erp
247 * RETURN VALUES
248 * erp modified erp
249 */
250 static struct dasd_ccw_req *
251 dasd_3990_erp_int_req(struct dasd_ccw_req * erp)
252 {
253
254 struct dasd_device *device = erp->device;
255
256 /* first time set initial retry counter and erp_function */
257 /* and retry once without blocking queue */
258 /* (this enables easier enqueing of the cqr) */
259 if (erp->function != dasd_3990_erp_int_req) {
260
261 erp->retries = 256;
262 erp->function = dasd_3990_erp_int_req;
263
264 } else {
265
266 /* issue a message and wait for 'device ready' interrupt */
267 DEV_MESSAGE(KERN_ERR, device, "%s",
268 "is offline or not installed - "
269 "INTERVENTION REQUIRED!!");
270
271 dasd_3990_erp_block_queue(erp, 60*HZ);
272 }
273
274 return erp;
275
276 } /* end dasd_3990_erp_int_req */
277
278 /*
279 * DASD_3990_ERP_ALTERNATE_PATH
280 *
281 * DESCRIPTION
282 * Repeat the operation on a different channel path.
283 * If all alternate paths have been tried, the request is posted with a
284 * permanent error.
285 *
286 * PARAMETER
287 * erp pointer to the current ERP
288 *
289 * RETURN VALUES
290 * erp modified pointer to the ERP
291 */
292 static void
293 dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp)
294 {
295 struct dasd_device *device = erp->device;
296 __u8 opm;
297
298 /* try alternate valid path */
299 opm = ccw_device_get_path_mask(device->cdev);
300 //FIXME: start with get_opm ?
301 if (erp->lpm == 0)
302 erp->lpm = LPM_ANYPATH & ~(erp->irb.esw.esw0.sublog.lpum);
303 else
304 erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum);
305
306 if ((erp->lpm & opm) != 0x00) {
307
308 DEV_MESSAGE(KERN_DEBUG, device,
309 "try alternate lpm=%x (lpum=%x / opm=%x)",
310 erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm);
311
312 /* reset status to queued to handle the request again... */
313 if (erp->status > DASD_CQR_QUEUED)
314 erp->status = DASD_CQR_QUEUED;
315 erp->retries = 1;
316 } else {
317 DEV_MESSAGE(KERN_ERR, device,
318 "No alternate channel path left (lpum=%x / "
319 "opm=%x) -> permanent error",
320 erp->irb.esw.esw0.sublog.lpum, opm);
321
322 /* post request with permanent error */
323 if (erp->status > DASD_CQR_QUEUED)
324 erp->status = DASD_CQR_FAILED;
325 }
326 } /* end dasd_3990_erp_alternate_path */
327
328 /*
329 * DASD_3990_ERP_DCTL
330 *
331 * DESCRIPTION
332 * Setup cqr to do the Diagnostic Control (DCTL) command with an
333 * Inhibit Write subcommand (0x20) and the given modifier.
334 *
335 * PARAMETER
336 * erp pointer to the current (failed) ERP
337 * modifier subcommand modifier
338 *
339 * RETURN VALUES
340 * dctl_cqr pointer to NEW dctl_cqr
341 *
342 */
343 static struct dasd_ccw_req *
344 dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier)
345 {
346
347 struct dasd_device *device = erp->device;
348 struct DCTL_data *DCTL_data;
349 struct ccw1 *ccw;
350 struct dasd_ccw_req *dctl_cqr;
351
352 dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1,
353 sizeof (struct DCTL_data),
354 erp->device);
355 if (IS_ERR(dctl_cqr)) {
356 DEV_MESSAGE(KERN_ERR, device, "%s",
357 "Unable to allocate DCTL-CQR");
358 erp->status = DASD_CQR_FAILED;
359 return erp;
360 }
361
362 DCTL_data = dctl_cqr->data;
363
364 DCTL_data->subcommand = 0x02; /* Inhibit Write */
365 DCTL_data->modifier = modifier;
366
367 ccw = dctl_cqr->cpaddr;
368 memset(ccw, 0, sizeof (struct ccw1));
369 ccw->cmd_code = CCW_CMD_DCTL;
370 ccw->count = 4;
371 ccw->cda = (__u32)(addr_t) DCTL_data;
372 dctl_cqr->function = dasd_3990_erp_DCTL;
373 dctl_cqr->refers = erp;
374 dctl_cqr->device = erp->device;
375 dctl_cqr->magic = erp->magic;
376 dctl_cqr->expires = 5 * 60 * HZ;
377 dctl_cqr->retries = 2;
378
379 dctl_cqr->buildclk = get_clock();
380
381 dctl_cqr->status = DASD_CQR_FILLED;
382
383 return dctl_cqr;
384
385 } /* end dasd_3990_erp_DCTL */
386
387 /*
388 * DASD_3990_ERP_ACTION_1
389 *
390 * DESCRIPTION
391 * Setup ERP to do the ERP action 1 (see Reference manual).
392 * Repeat the operation on a different channel path.
393 * If all alternate paths have been tried, the request is posted with a
394 * permanent error.
395 * Note: duplex handling is not implemented (yet).
396 *
397 * PARAMETER
398 * erp pointer to the current ERP
399 *
400 * RETURN VALUES
401 * erp pointer to the ERP
402 *
403 */
404 static struct dasd_ccw_req *
405 dasd_3990_erp_action_1(struct dasd_ccw_req * erp)
406 {
407
408 erp->function = dasd_3990_erp_action_1;
409
410 dasd_3990_erp_alternate_path(erp);
411
412 return erp;
413
414 } /* end dasd_3990_erp_action_1 */
415
416 /*
417 * DASD_3990_ERP_ACTION_4
418 *
419 * DESCRIPTION
420 * Setup ERP to do the ERP action 4 (see Reference manual).
421 * Set the current request to PENDING to block the CQR queue for that device
422 * until the state change interrupt appears.
423 * Use a timer (20 seconds) to retry the cqr if the interrupt is still
424 * missing.
425 *
426 * PARAMETER
427 * sense sense data of the actual error
428 * erp pointer to the current ERP
429 *
430 * RETURN VALUES
431 * erp pointer to the ERP
432 *
433 */
434 static struct dasd_ccw_req *
435 dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense)
436 {
437
438 struct dasd_device *device = erp->device;
439
440 /* first time set initial retry counter and erp_function */
441 /* and retry once without waiting for state change pending */
442 /* interrupt (this enables easier enqueing of the cqr) */
443 if (erp->function != dasd_3990_erp_action_4) {
444
445 DEV_MESSAGE(KERN_INFO, device, "%s",
446 "dasd_3990_erp_action_4: first time retry");
447
448 erp->retries = 256;
449 erp->function = dasd_3990_erp_action_4;
450
451 } else {
452
453 if (sense[25] == 0x1D) { /* state change pending */
454
455 DEV_MESSAGE(KERN_INFO, device,
456 "waiting for state change pending "
457 "interrupt, %d retries left",
458 erp->retries);
459
460 dasd_3990_erp_block_queue(erp, 30*HZ);
461
462 } else if (sense[25] == 0x1E) { /* busy */
463 DEV_MESSAGE(KERN_INFO, device,
464 "busy - redriving request later, "
465 "%d retries left",
466 erp->retries);
467 dasd_3990_erp_block_queue(erp, HZ);
468 } else {
469
470 /* no state change pending - retry */
471 DEV_MESSAGE (KERN_INFO, device,
472 "redriving request immediately, "
473 "%d retries left",
474 erp->retries);
475 erp->status = DASD_CQR_QUEUED;
476 }
477 }
478
479 return erp;
480
481 } /* end dasd_3990_erp_action_4 */
482
483 /*
484 *****************************************************************************
485 * 24 byte sense ERP functions (only)
486 *****************************************************************************
487 */
488
489 /*
490 * DASD_3990_ERP_ACTION_5
491 *
492 * DESCRIPTION
493 * Setup ERP to do the ERP action 5 (see Reference manual).
494 * NOTE: Further handling is done in xxx_further_erp after the retries.
495 *
496 * PARAMETER
497 * erp pointer to the current ERP
498 *
499 * RETURN VALUES
500 * erp pointer to the ERP
501 *
502 */
503 static struct dasd_ccw_req *
504 dasd_3990_erp_action_5(struct dasd_ccw_req * erp)
505 {
506
507 /* first of all retry */
508 erp->retries = 10;
509 erp->function = dasd_3990_erp_action_5;
510
511 return erp;
512
513 } /* end dasd_3990_erp_action_5 */
514
515 /*
516 * DASD_3990_HANDLE_ENV_DATA
517 *
518 * DESCRIPTION
519 * Handles 24 byte 'Environmental data present'.
520 * Does a analysis of the sense data (message Format)
521 * and prints the error messages.
522 *
523 * PARAMETER
524 * sense current sense data
525 *
526 * RETURN VALUES
527 * void
528 */
529 static void
530 dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense)
531 {
532
533 struct dasd_device *device = erp->device;
534 char msg_format = (sense[7] & 0xF0);
535 char msg_no = (sense[7] & 0x0F);
536
537 switch (msg_format) {
538 case 0x00: /* Format 0 - Program or System Checks */
539
540 if (sense[1] & 0x10) { /* check message to operator bit */
541
542 switch (msg_no) {
543 case 0x00: /* No Message */
544 break;
545 case 0x01:
546 DEV_MESSAGE(KERN_WARNING, device, "%s",
547 "FORMAT 0 - Invalid Command");
548 break;
549 case 0x02:
550 DEV_MESSAGE(KERN_WARNING, device, "%s",
551 "FORMAT 0 - Invalid Command "
552 "Sequence");
553 break;
554 case 0x03:
555 DEV_MESSAGE(KERN_WARNING, device, "%s",
556 "FORMAT 0 - CCW Count less than "
557 "required");
558 break;
559 case 0x04:
560 DEV_MESSAGE(KERN_WARNING, device, "%s",
561 "FORMAT 0 - Invalid Parameter");
562 break;
563 case 0x05:
564 DEV_MESSAGE(KERN_WARNING, device, "%s",
565 "FORMAT 0 - Diagnostic of Sepecial"
566 " Command Violates File Mask");
567 break;
568 case 0x07:
569 DEV_MESSAGE(KERN_WARNING, device, "%s",
570 "FORMAT 0 - Channel Returned with "
571 "Incorrect retry CCW");
572 break;
573 case 0x08:
574 DEV_MESSAGE(KERN_WARNING, device, "%s",
575 "FORMAT 0 - Reset Notification");
576 break;
577 case 0x09:
578 DEV_MESSAGE(KERN_WARNING, device, "%s",
579 "FORMAT 0 - Storage Path Restart");
580 break;
581 case 0x0A:
582 DEV_MESSAGE(KERN_WARNING, device,
583 "FORMAT 0 - Channel requested "
584 "... %02x", sense[8]);
585 break;
586 case 0x0B:
587 DEV_MESSAGE(KERN_WARNING, device, "%s",
588 "FORMAT 0 - Invalid Defective/"
589 "Alternate Track Pointer");
590 break;
591 case 0x0C:
592 DEV_MESSAGE(KERN_WARNING, device, "%s",
593 "FORMAT 0 - DPS Installation "
594 "Check");
595 break;
596 case 0x0E:
597 DEV_MESSAGE(KERN_WARNING, device, "%s",
598 "FORMAT 0 - Command Invalid on "
599 "Secondary Address");
600 break;
601 case 0x0F:
602 DEV_MESSAGE(KERN_WARNING, device,
603 "FORMAT 0 - Status Not As "
604 "Required: reason %02x", sense[8]);
605 break;
606 default:
607 DEV_MESSAGE(KERN_WARNING, device, "%s",
608 "FORMAT 0 - Reseved");
609 }
610 } else {
611 switch (msg_no) {
612 case 0x00: /* No Message */
613 break;
614 case 0x01:
615 DEV_MESSAGE(KERN_WARNING, device, "%s",
616 "FORMAT 0 - Device Error Source");
617 break;
618 case 0x02:
619 DEV_MESSAGE(KERN_WARNING, device, "%s",
620 "FORMAT 0 - Reserved");
621 break;
622 case 0x03:
623 DEV_MESSAGE(KERN_WARNING, device,
624 "FORMAT 0 - Device Fenced - "
625 "device = %02x", sense[4]);
626 break;
627 case 0x04:
628 DEV_MESSAGE(KERN_WARNING, device, "%s",
629 "FORMAT 0 - Data Pinned for "
630 "Device");
631 break;
632 default:
633 DEV_MESSAGE(KERN_WARNING, device, "%s",
634 "FORMAT 0 - Reserved");
635 }
636 }
637 break;
638
639 case 0x10: /* Format 1 - Device Equipment Checks */
640 switch (msg_no) {
641 case 0x00: /* No Message */
642 break;
643 case 0x01:
644 DEV_MESSAGE(KERN_WARNING, device, "%s",
645 "FORMAT 1 - Device Status 1 not as "
646 "expected");
647 break;
648 case 0x03:
649 DEV_MESSAGE(KERN_WARNING, device, "%s",
650 "FORMAT 1 - Index missing");
651 break;
652 case 0x04:
653 DEV_MESSAGE(KERN_WARNING, device, "%s",
654 "FORMAT 1 - Interruption cannot be reset");
655 break;
656 case 0x05:
657 DEV_MESSAGE(KERN_WARNING, device, "%s",
658 "FORMAT 1 - Device did not respond to "
659 "selection");
660 break;
661 case 0x06:
662 DEV_MESSAGE(KERN_WARNING, device, "%s",
663 "FORMAT 1 - Device check-2 error or Set "
664 "Sector is not complete");
665 break;
666 case 0x07:
667 DEV_MESSAGE(KERN_WARNING, device, "%s",
668 "FORMAT 1 - Head address does not "
669 "compare");
670 break;
671 case 0x08:
672 DEV_MESSAGE(KERN_WARNING, device, "%s",
673 "FORMAT 1 - Device status 1 not valid");
674 break;
675 case 0x09:
676 DEV_MESSAGE(KERN_WARNING, device, "%s",
677 "FORMAT 1 - Device not ready");
678 break;
679 case 0x0A:
680 DEV_MESSAGE(KERN_WARNING, device, "%s",
681 "FORMAT 1 - Track physical address did "
682 "not compare");
683 break;
684 case 0x0B:
685 DEV_MESSAGE(KERN_WARNING, device, "%s",
686 "FORMAT 1 - Missing device address bit");
687 break;
688 case 0x0C:
689 DEV_MESSAGE(KERN_WARNING, device, "%s",
690 "FORMAT 1 - Drive motor switch is off");
691 break;
692 case 0x0D:
693 DEV_MESSAGE(KERN_WARNING, device, "%s",
694 "FORMAT 1 - Seek incomplete");
695 break;
696 case 0x0E:
697 DEV_MESSAGE(KERN_WARNING, device, "%s",
698 "FORMAT 1 - Cylinder address did not "
699 "compare");
700 break;
701 case 0x0F:
702 DEV_MESSAGE(KERN_WARNING, device, "%s",
703 "FORMAT 1 - Offset active cannot be "
704 "reset");
705 break;
706 default:
707 DEV_MESSAGE(KERN_WARNING, device, "%s",
708 "FORMAT 1 - Reserved");
709 }
710 break;
711
712 case 0x20: /* Format 2 - 3990 Equipment Checks */
713 switch (msg_no) {
714 case 0x08:
715 DEV_MESSAGE(KERN_WARNING, device, "%s",
716 "FORMAT 2 - 3990 check-2 error");
717 break;
718 case 0x0E:
719 DEV_MESSAGE(KERN_WARNING, device, "%s",
720 "FORMAT 2 - Support facility errors");
721 break;
722 case 0x0F:
723 DEV_MESSAGE(KERN_WARNING, device,
724 "FORMAT 2 - Microcode detected error %02x",
725 sense[8]);
726 break;
727 default:
728 DEV_MESSAGE(KERN_WARNING, device, "%s",
729 "FORMAT 2 - Reserved");
730 }
731 break;
732
733 case 0x30: /* Format 3 - 3990 Control Checks */
734 switch (msg_no) {
735 case 0x0F:
736 DEV_MESSAGE(KERN_WARNING, device, "%s",
737 "FORMAT 3 - Allegiance terminated");
738 break;
739 default:
740 DEV_MESSAGE(KERN_WARNING, device, "%s",
741 "FORMAT 3 - Reserved");
742 }
743 break;
744
745 case 0x40: /* Format 4 - Data Checks */
746 switch (msg_no) {
747 case 0x00:
748 DEV_MESSAGE(KERN_WARNING, device, "%s",
749 "FORMAT 4 - Home address area error");
750 break;
751 case 0x01:
752 DEV_MESSAGE(KERN_WARNING, device, "%s",
753 "FORMAT 4 - Count area error");
754 break;
755 case 0x02:
756 DEV_MESSAGE(KERN_WARNING, device, "%s",
757 "FORMAT 4 - Key area error");
758 break;
759 case 0x03:
760 DEV_MESSAGE(KERN_WARNING, device, "%s",
761 "FORMAT 4 - Data area error");
762 break;
763 case 0x04:
764 DEV_MESSAGE(KERN_WARNING, device, "%s",
765 "FORMAT 4 - No sync byte in home address "
766 "area");
767 break;
768 case 0x05:
769 DEV_MESSAGE(KERN_WARNING, device, "%s",
770 "FORMAT 4 - No sync byte in count address "
771 "area");
772 break;
773 case 0x06:
774 DEV_MESSAGE(KERN_WARNING, device, "%s",
775 "FORMAT 4 - No sync byte in key area");
776 break;
777 case 0x07:
778 DEV_MESSAGE(KERN_WARNING, device, "%s",
779 "FORMAT 4 - No sync byte in data area");
780 break;
781 case 0x08:
782 DEV_MESSAGE(KERN_WARNING, device, "%s",
783 "FORMAT 4 - Home address area error; "
784 "offset active");
785 break;
786 case 0x09:
787 DEV_MESSAGE(KERN_WARNING, device, "%s",
788 "FORMAT 4 - Count area error; offset "
789 "active");
790 break;
791 case 0x0A:
792 DEV_MESSAGE(KERN_WARNING, device, "%s",
793 "FORMAT 4 - Key area error; offset "
794 "active");
795 break;
796 case 0x0B:
797 DEV_MESSAGE(KERN_WARNING, device, "%s",
798 "FORMAT 4 - Data area error; "
799 "offset active");
800 break;
801 case 0x0C:
802 DEV_MESSAGE(KERN_WARNING, device, "%s",
803 "FORMAT 4 - No sync byte in home "
804 "address area; offset active");
805 break;
806 case 0x0D:
807 DEV_MESSAGE(KERN_WARNING, device, "%s",
808 "FORMAT 4 - No syn byte in count "
809 "address area; offset active");
810 break;
811 case 0x0E:
812 DEV_MESSAGE(KERN_WARNING, device, "%s",
813 "FORMAT 4 - No sync byte in key area; "
814 "offset active");
815 break;
816 case 0x0F:
817 DEV_MESSAGE(KERN_WARNING, device, "%s",
818 "FORMAT 4 - No syn byte in data area; "
819 "offset active");
820 break;
821 default:
822 DEV_MESSAGE(KERN_WARNING, device, "%s",
823 "FORMAT 4 - Reserved");
824 }
825 break;
826
827 case 0x50: /* Format 5 - Data Check with displacement information */
828 switch (msg_no) {
829 case 0x00:
830 DEV_MESSAGE(KERN_WARNING, device, "%s",
831 "FORMAT 5 - Data Check in the "
832 "home address area");
833 break;
834 case 0x01:
835 DEV_MESSAGE(KERN_WARNING, device, "%s",
836 "FORMAT 5 - Data Check in the count area");
837 break;
838 case 0x02:
839 DEV_MESSAGE(KERN_WARNING, device, "%s",
840 "FORMAT 5 - Data Check in the key area");
841 break;
842 case 0x03:
843 DEV_MESSAGE(KERN_WARNING, device, "%s",
844 "FORMAT 5 - Data Check in the data area");
845 break;
846 case 0x08:
847 DEV_MESSAGE(KERN_WARNING, device, "%s",
848 "FORMAT 5 - Data Check in the "
849 "home address area; offset active");
850 break;
851 case 0x09:
852 DEV_MESSAGE(KERN_WARNING, device, "%s",
853 "FORMAT 5 - Data Check in the count area; "
854 "offset active");
855 break;
856 case 0x0A:
857 DEV_MESSAGE(KERN_WARNING, device, "%s",
858 "FORMAT 5 - Data Check in the key area; "
859 "offset active");
860 break;
861 case 0x0B:
862 DEV_MESSAGE(KERN_WARNING, device, "%s",
863 "FORMAT 5 - Data Check in the data area; "
864 "offset active");
865 break;
866 default:
867 DEV_MESSAGE(KERN_WARNING, device, "%s",
868 "FORMAT 5 - Reserved");
869 }
870 break;
871
872 case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */
873 switch (msg_no) {
874 case 0x00:
875 DEV_MESSAGE(KERN_WARNING, device, "%s",
876 "FORMAT 6 - Overrun on channel A");
877 break;
878 case 0x01:
879 DEV_MESSAGE(KERN_WARNING, device, "%s",
880 "FORMAT 6 - Overrun on channel B");
881 break;
882 case 0x02:
883 DEV_MESSAGE(KERN_WARNING, device, "%s",
884 "FORMAT 6 - Overrun on channel C");
885 break;
886 case 0x03:
887 DEV_MESSAGE(KERN_WARNING, device, "%s",
888 "FORMAT 6 - Overrun on channel D");
889 break;
890 case 0x04:
891 DEV_MESSAGE(KERN_WARNING, device, "%s",
892 "FORMAT 6 - Overrun on channel E");
893 break;
894 case 0x05:
895 DEV_MESSAGE(KERN_WARNING, device, "%s",
896 "FORMAT 6 - Overrun on channel F");
897 break;
898 case 0x06:
899 DEV_MESSAGE(KERN_WARNING, device, "%s",
900 "FORMAT 6 - Overrun on channel G");
901 break;
902 case 0x07:
903 DEV_MESSAGE(KERN_WARNING, device, "%s",
904 "FORMAT 6 - Overrun on channel H");
905 break;
906 default:
907 DEV_MESSAGE(KERN_WARNING, device, "%s",
908 "FORMAT 6 - Reserved");
909 }
910 break;
911
912 case 0x70: /* Format 7 - Device Connection Control Checks */
913 switch (msg_no) {
914 case 0x00:
915 DEV_MESSAGE(KERN_WARNING, device, "%s",
916 "FORMAT 7 - RCC initiated by a connection "
917 "check alert");
918 break;
919 case 0x01:
920 DEV_MESSAGE(KERN_WARNING, device, "%s",
921 "FORMAT 7 - RCC 1 sequence not "
922 "successful");
923 break;
924 case 0x02:
925 DEV_MESSAGE(KERN_WARNING, device, "%s",
926 "FORMAT 7 - RCC 1 and RCC 2 sequences not "
927 "successful");
928 break;
929 case 0x03:
930 DEV_MESSAGE(KERN_WARNING, device, "%s",
931 "FORMAT 7 - Invalid tag-in during "
932 "selection sequence");
933 break;
934 case 0x04:
935 DEV_MESSAGE(KERN_WARNING, device, "%s",
936 "FORMAT 7 - extra RCC required");
937 break;
938 case 0x05:
939 DEV_MESSAGE(KERN_WARNING, device, "%s",
940 "FORMAT 7 - Invalid DCC selection "
941 "response or timeout");
942 break;
943 case 0x06:
944 DEV_MESSAGE(KERN_WARNING, device, "%s",
945 "FORMAT 7 - Missing end operation; device "
946 "transfer complete");
947 break;
948 case 0x07:
949 DEV_MESSAGE(KERN_WARNING, device, "%s",
950 "FORMAT 7 - Missing end operation; device "
951 "transfer incomplete");
952 break;
953 case 0x08:
954 DEV_MESSAGE(KERN_WARNING, device, "%s",
955 "FORMAT 7 - Invalid tag-in for an "
956 "immediate command sequence");
957 break;
958 case 0x09:
959 DEV_MESSAGE(KERN_WARNING, device, "%s",
960 "FORMAT 7 - Invalid tag-in for an "
961 "extended command sequence");
962 break;
963 case 0x0A:
964 DEV_MESSAGE(KERN_WARNING, device, "%s",
965 "FORMAT 7 - 3990 microcode time out when "
966 "stopping selection");
967 break;
968 case 0x0B:
969 DEV_MESSAGE(KERN_WARNING, device, "%s",
970 "FORMAT 7 - No response to selection "
971 "after a poll interruption");
972 break;
973 case 0x0C:
974 DEV_MESSAGE(KERN_WARNING, device, "%s",
975 "FORMAT 7 - Permanent path error (DASD "
976 "controller not available)");
977 break;
978 case 0x0D:
979 DEV_MESSAGE(KERN_WARNING, device, "%s",
980 "FORMAT 7 - DASD controller not available"
981 " on disconnected command chain");
982 break;
983 default:
984 DEV_MESSAGE(KERN_WARNING, device, "%s",
985 "FORMAT 7 - Reserved");
986 }
987 break;
988
989 case 0x80: /* Format 8 - Additional Device Equipment Checks */
990 switch (msg_no) {
991 case 0x00: /* No Message */
992 case 0x01:
993 DEV_MESSAGE(KERN_WARNING, device, "%s",
994 "FORMAT 8 - Error correction code "
995 "hardware fault");
996 break;
997 case 0x03:
998 DEV_MESSAGE(KERN_WARNING, device, "%s",
999 "FORMAT 8 - Unexpected end operation "
1000 "response code");
1001 break;
1002 case 0x04:
1003 DEV_MESSAGE(KERN_WARNING, device, "%s",
1004 "FORMAT 8 - End operation with transfer "
1005 "count not zero");
1006 break;
1007 case 0x05:
1008 DEV_MESSAGE(KERN_WARNING, device, "%s",
1009 "FORMAT 8 - End operation with transfer "
1010 "count zero");
1011 break;
1012 case 0x06:
1013 DEV_MESSAGE(KERN_WARNING, device, "%s",
1014 "FORMAT 8 - DPS checks after a system "
1015 "reset or selective reset");
1016 break;
1017 case 0x07:
1018 DEV_MESSAGE(KERN_WARNING, device, "%s",
1019 "FORMAT 8 - DPS cannot be filled");
1020 break;
1021 case 0x08:
1022 DEV_MESSAGE(KERN_WARNING, device, "%s",
1023 "FORMAT 8 - Short busy time-out during "
1024 "device selection");
1025 break;
1026 case 0x09:
1027 DEV_MESSAGE(KERN_WARNING, device, "%s",
1028 "FORMAT 8 - DASD controller failed to "
1029 "set or reset the long busy latch");
1030 break;
1031 case 0x0A:
1032 DEV_MESSAGE(KERN_WARNING, device, "%s",
1033 "FORMAT 8 - No interruption from device "
1034 "during a command chain");
1035 break;
1036 default:
1037 DEV_MESSAGE(KERN_WARNING, device, "%s",
1038 "FORMAT 8 - Reserved");
1039 }
1040 break;
1041
1042 case 0x90: /* Format 9 - Device Read, Write, and Seek Checks */
1043 switch (msg_no) {
1044 case 0x00:
1045 break; /* No Message */
1046 case 0x06:
1047 DEV_MESSAGE(KERN_WARNING, device, "%s",
1048 "FORMAT 9 - Device check-2 error");
1049 break;
1050 case 0x07:
1051 DEV_MESSAGE(KERN_WARNING, device, "%s",
1052 "FORMAT 9 - Head address did not compare");
1053 break;
1054 case 0x0A:
1055 DEV_MESSAGE(KERN_WARNING, device, "%s",
1056 "FORMAT 9 - Track physical address did "
1057 "not compare while oriented");
1058 break;
1059 case 0x0E:
1060 DEV_MESSAGE(KERN_WARNING, device, "%s",
1061 "FORMAT 9 - Cylinder address did not "
1062 "compare");
1063 break;
1064 default:
1065 DEV_MESSAGE(KERN_WARNING, device, "%s",
1066 "FORMAT 9 - Reserved");
1067 }
1068 break;
1069
1070 case 0xF0: /* Format F - Cache Storage Checks */
1071 switch (msg_no) {
1072 case 0x00:
1073 DEV_MESSAGE(KERN_WARNING, device, "%s",
1074 "FORMAT F - Operation Terminated");
1075 break;
1076 case 0x01:
1077 DEV_MESSAGE(KERN_WARNING, device, "%s",
1078 "FORMAT F - Subsystem Processing Error");
1079 break;
1080 case 0x02:
1081 DEV_MESSAGE(KERN_WARNING, device, "%s",
1082 "FORMAT F - Cache or nonvolatile storage "
1083 "equipment failure");
1084 break;
1085 case 0x04:
1086 DEV_MESSAGE(KERN_WARNING, device, "%s",
1087 "FORMAT F - Caching terminated");
1088 break;
1089 case 0x06:
1090 DEV_MESSAGE(KERN_WARNING, device, "%s",
1091 "FORMAT F - Cache fast write access not "
1092 "authorized");
1093 break;
1094 case 0x07:
1095 DEV_MESSAGE(KERN_WARNING, device, "%s",
1096 "FORMAT F - Track format incorrect");
1097 break;
1098 case 0x09:
1099 DEV_MESSAGE(KERN_WARNING, device, "%s",
1100 "FORMAT F - Caching reinitiated");
1101 break;
1102 case 0x0A:
1103 DEV_MESSAGE(KERN_WARNING, device, "%s",
1104 "FORMAT F - Nonvolatile storage "
1105 "terminated");
1106 break;
1107 case 0x0B:
1108 DEV_MESSAGE(KERN_WARNING, device, "%s",
1109 "FORMAT F - Volume is suspended duplex");
1110 /* call extended error reporting (EER) */
1111 dasd_eer_write(device, erp->refers,
1112 DASD_EER_PPRCSUSPEND);
1113 break;
1114 case 0x0C:
1115 DEV_MESSAGE(KERN_WARNING, device, "%s",
1116 "FORMAT F - Subsystem status connot be "
1117 "determined");
1118 break;
1119 case 0x0D:
1120 DEV_MESSAGE(KERN_WARNING, device, "%s",
1121 "FORMAT F - Caching status reset to "
1122 "default");
1123 break;
1124 case 0x0E:
1125 DEV_MESSAGE(KERN_WARNING, device, "%s",
1126 "FORMAT F - DASD Fast Write inhibited");
1127 break;
1128 default:
1129 DEV_MESSAGE(KERN_WARNING, device, "%s",
1130 "FORMAT D - Reserved");
1131 }
1132 break;
1133
1134 default: /* unknown message format - should not happen */
1135 DEV_MESSAGE (KERN_WARNING, device,
1136 "unknown message format %02x",
1137 msg_format);
1138 break;
1139 } /* end switch message format */
1140
1141 } /* end dasd_3990_handle_env_data */
1142
1143 /*
1144 * DASD_3990_ERP_COM_REJ
1145 *
1146 * DESCRIPTION
1147 * Handles 24 byte 'Command Reject' error.
1148 *
1149 * PARAMETER
1150 * erp current erp_head
1151 * sense current sense data
1152 *
1153 * RETURN VALUES
1154 * erp 'new' erp_head - pointer to new ERP
1155 */
1156 static struct dasd_ccw_req *
1157 dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense)
1158 {
1159
1160 struct dasd_device *device = erp->device;
1161
1162 erp->function = dasd_3990_erp_com_rej;
1163
1164 /* env data present (ACTION 10 - retry should work) */
1165 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1166
1167 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1168 "Command Reject - environmental data present");
1169
1170 dasd_3990_handle_env_data(erp, sense);
1171
1172 erp->retries = 5;
1173
1174 } else {
1175 /* fatal error - set status to FAILED */
1176 DEV_MESSAGE(KERN_ERR, device, "%s",
1177 "Command Reject - Fatal error");
1178
1179 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1180 }
1181
1182 return erp;
1183
1184 } /* end dasd_3990_erp_com_rej */
1185
1186 /*
1187 * DASD_3990_ERP_BUS_OUT
1188 *
1189 * DESCRIPTION
1190 * Handles 24 byte 'Bus Out Parity Check' error.
1191 *
1192 * PARAMETER
1193 * erp current erp_head
1194 * RETURN VALUES
1195 * erp new erp_head - pointer to new ERP
1196 */
1197 static struct dasd_ccw_req *
1198 dasd_3990_erp_bus_out(struct dasd_ccw_req * erp)
1199 {
1200
1201 struct dasd_device *device = erp->device;
1202
1203 /* first time set initial retry counter and erp_function */
1204 /* and retry once without blocking queue */
1205 /* (this enables easier enqueing of the cqr) */
1206 if (erp->function != dasd_3990_erp_bus_out) {
1207 erp->retries = 256;
1208 erp->function = dasd_3990_erp_bus_out;
1209
1210 } else {
1211
1212 /* issue a message and wait for 'device ready' interrupt */
1213 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1214 "bus out parity error or BOPC requested by "
1215 "channel");
1216
1217 dasd_3990_erp_block_queue(erp, 60*HZ);
1218
1219 }
1220
1221 return erp;
1222
1223 } /* end dasd_3990_erp_bus_out */
1224
1225 /*
1226 * DASD_3990_ERP_EQUIP_CHECK
1227 *
1228 * DESCRIPTION
1229 * Handles 24 byte 'Equipment Check' error.
1230 *
1231 * PARAMETER
1232 * erp current erp_head
1233 * RETURN VALUES
1234 * erp new erp_head - pointer to new ERP
1235 */
1236 static struct dasd_ccw_req *
1237 dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense)
1238 {
1239
1240 struct dasd_device *device = erp->device;
1241
1242 erp->function = dasd_3990_erp_equip_check;
1243
1244 if (sense[1] & SNS1_WRITE_INHIBITED) {
1245
1246 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1247 "Write inhibited path encountered");
1248
1249 /* vary path offline */
1250 DEV_MESSAGE(KERN_ERR, device, "%s",
1251 "Path should be varied off-line. "
1252 "This is not implemented yet \n - please report "
1253 "to linux390@de.ibm.com");
1254
1255 erp = dasd_3990_erp_action_1(erp);
1256
1257 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1258
1259 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1260 "Equipment Check - " "environmental data present");
1261
1262 dasd_3990_handle_env_data(erp, sense);
1263
1264 erp = dasd_3990_erp_action_4(erp, sense);
1265
1266 } else if (sense[1] & SNS1_PERM_ERR) {
1267
1268 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1269 "Equipment Check - retry exhausted or "
1270 "undesirable");
1271
1272 erp = dasd_3990_erp_action_1(erp);
1273
1274 } else {
1275 /* all other equipment checks - Action 5 */
1276 /* rest is done when retries == 0 */
1277 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1278 "Equipment check or processing error");
1279
1280 erp = dasd_3990_erp_action_5(erp);
1281 }
1282
1283 return erp;
1284
1285 } /* end dasd_3990_erp_equip_check */
1286
1287 /*
1288 * DASD_3990_ERP_DATA_CHECK
1289 *
1290 * DESCRIPTION
1291 * Handles 24 byte 'Data Check' error.
1292 *
1293 * PARAMETER
1294 * erp current erp_head
1295 * RETURN VALUES
1296 * erp new erp_head - pointer to new ERP
1297 */
1298 static struct dasd_ccw_req *
1299 dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense)
1300 {
1301
1302 struct dasd_device *device = erp->device;
1303
1304 erp->function = dasd_3990_erp_data_check;
1305
1306 if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */
1307
1308 /* issue message that the data has been corrected */
1309 DEV_MESSAGE(KERN_EMERG, device, "%s",
1310 "Data recovered during retry with PCI "
1311 "fetch mode active");
1312
1313 /* not possible to handle this situation in Linux */
1314 panic("No way to inform application about the possibly "
1315 "incorrect data");
1316
1317 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1318
1319 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1320 "Uncorrectable data check recovered secondary "
1321 "addr of duplex pair");
1322
1323 erp = dasd_3990_erp_action_4(erp, sense);
1324
1325 } else if (sense[1] & SNS1_PERM_ERR) {
1326
1327 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1328 "Uncorrectable data check with internal "
1329 "retry exhausted");
1330
1331 erp = dasd_3990_erp_action_1(erp);
1332
1333 } else {
1334 /* all other data checks */
1335 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1336 "Uncorrectable data check with retry count "
1337 "exhausted...");
1338
1339 erp = dasd_3990_erp_action_5(erp);
1340 }
1341
1342 return erp;
1343
1344 } /* end dasd_3990_erp_data_check */
1345
1346 /*
1347 * DASD_3990_ERP_OVERRUN
1348 *
1349 * DESCRIPTION
1350 * Handles 24 byte 'Overrun' error.
1351 *
1352 * PARAMETER
1353 * erp current erp_head
1354 * RETURN VALUES
1355 * erp new erp_head - pointer to new ERP
1356 */
1357 static struct dasd_ccw_req *
1358 dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense)
1359 {
1360
1361 struct dasd_device *device = erp->device;
1362
1363 erp->function = dasd_3990_erp_overrun;
1364
1365 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1366 "Overrun - service overrun or overrun"
1367 " error requested by channel");
1368
1369 erp = dasd_3990_erp_action_5(erp);
1370
1371 return erp;
1372
1373 } /* end dasd_3990_erp_overrun */
1374
1375 /*
1376 * DASD_3990_ERP_INV_FORMAT
1377 *
1378 * DESCRIPTION
1379 * Handles 24 byte 'Invalid Track Format' error.
1380 *
1381 * PARAMETER
1382 * erp current erp_head
1383 * RETURN VALUES
1384 * erp new erp_head - pointer to new ERP
1385 */
1386 static struct dasd_ccw_req *
1387 dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense)
1388 {
1389
1390 struct dasd_device *device = erp->device;
1391
1392 erp->function = dasd_3990_erp_inv_format;
1393
1394 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1395
1396 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1397 "Track format error when destaging or "
1398 "staging data");
1399
1400 dasd_3990_handle_env_data(erp, sense);
1401
1402 erp = dasd_3990_erp_action_4(erp, sense);
1403
1404 } else {
1405 DEV_MESSAGE(KERN_ERR, device, "%s",
1406 "Invalid Track Format - Fatal error should have "
1407 "been handled within the interrupt handler");
1408
1409 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1410 }
1411
1412 return erp;
1413
1414 } /* end dasd_3990_erp_inv_format */
1415
1416 /*
1417 * DASD_3990_ERP_EOC
1418 *
1419 * DESCRIPTION
1420 * Handles 24 byte 'End-of-Cylinder' error.
1421 *
1422 * PARAMETER
1423 * erp already added default erp
1424 * RETURN VALUES
1425 * erp pointer to original (failed) cqr.
1426 */
1427 static struct dasd_ccw_req *
1428 dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense)
1429 {
1430
1431 struct dasd_device *device = default_erp->device;
1432
1433 DEV_MESSAGE(KERN_ERR, device, "%s",
1434 "End-of-Cylinder - must never happen");
1435
1436 /* implement action 7 - BUG */
1437 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1438
1439 } /* end dasd_3990_erp_EOC */
1440
1441 /*
1442 * DASD_3990_ERP_ENV_DATA
1443 *
1444 * DESCRIPTION
1445 * Handles 24 byte 'Environmental-Data Present' error.
1446 *
1447 * PARAMETER
1448 * erp current erp_head
1449 * RETURN VALUES
1450 * erp new erp_head - pointer to new ERP
1451 */
1452 static struct dasd_ccw_req *
1453 dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense)
1454 {
1455
1456 struct dasd_device *device = erp->device;
1457
1458 erp->function = dasd_3990_erp_env_data;
1459
1460 DEV_MESSAGE(KERN_DEBUG, device, "%s", "Environmental data present");
1461
1462 dasd_3990_handle_env_data(erp, sense);
1463
1464 /* don't retry on disabled interface */
1465 if (sense[7] != 0x0F) {
1466
1467 erp = dasd_3990_erp_action_4(erp, sense);
1468 } else {
1469
1470 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_IN_IO);
1471 }
1472
1473 return erp;
1474
1475 } /* end dasd_3990_erp_env_data */
1476
1477 /*
1478 * DASD_3990_ERP_NO_REC
1479 *
1480 * DESCRIPTION
1481 * Handles 24 byte 'No Record Found' error.
1482 *
1483 * PARAMETER
1484 * erp already added default ERP
1485 *
1486 * RETURN VALUES
1487 * erp new erp_head - pointer to new ERP
1488 */
1489 static struct dasd_ccw_req *
1490 dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense)
1491 {
1492
1493 struct dasd_device *device = default_erp->device;
1494
1495 DEV_MESSAGE(KERN_ERR, device, "%s",
1496 "No Record Found - Fatal error should "
1497 "have been handled within the interrupt handler");
1498
1499 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1500
1501 } /* end dasd_3990_erp_no_rec */
1502
1503 /*
1504 * DASD_3990_ERP_FILE_PROT
1505 *
1506 * DESCRIPTION
1507 * Handles 24 byte 'File Protected' error.
1508 * Note: Seek related recovery is not implemented because
1509 * wee don't use the seek command yet.
1510 *
1511 * PARAMETER
1512 * erp current erp_head
1513 * RETURN VALUES
1514 * erp new erp_head - pointer to new ERP
1515 */
1516 static struct dasd_ccw_req *
1517 dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
1518 {
1519
1520 struct dasd_device *device = erp->device;
1521
1522 DEV_MESSAGE(KERN_ERR, device, "%s", "File Protected");
1523
1524 return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1525
1526 } /* end dasd_3990_erp_file_prot */
1527
1528 /*
1529 * DASD_3990_ERP_INSPECT_24
1530 *
1531 * DESCRIPTION
1532 * Does a detailed inspection of the 24 byte sense data
1533 * and sets up a related error recovery action.
1534 *
1535 * PARAMETER
1536 * sense sense data of the actual error
1537 * erp pointer to the currently created default ERP
1538 *
1539 * RETURN VALUES
1540 * erp pointer to the (addtitional) ERP
1541 */
1542 static struct dasd_ccw_req *
1543 dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense)
1544 {
1545
1546 struct dasd_ccw_req *erp_filled = NULL;
1547
1548 /* Check sense for .... */
1549 /* 'Command Reject' */
1550 if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) {
1551 erp_filled = dasd_3990_erp_com_rej(erp, sense);
1552 }
1553 /* 'Intervention Required' */
1554 if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) {
1555 erp_filled = dasd_3990_erp_int_req(erp);
1556 }
1557 /* 'Bus Out Parity Check' */
1558 if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) {
1559 erp_filled = dasd_3990_erp_bus_out(erp);
1560 }
1561 /* 'Equipment Check' */
1562 if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) {
1563 erp_filled = dasd_3990_erp_equip_check(erp, sense);
1564 }
1565 /* 'Data Check' */
1566 if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) {
1567 erp_filled = dasd_3990_erp_data_check(erp, sense);
1568 }
1569 /* 'Overrun' */
1570 if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) {
1571 erp_filled = dasd_3990_erp_overrun(erp, sense);
1572 }
1573 /* 'Invalid Track Format' */
1574 if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) {
1575 erp_filled = dasd_3990_erp_inv_format(erp, sense);
1576 }
1577 /* 'End-of-Cylinder' */
1578 if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) {
1579 erp_filled = dasd_3990_erp_EOC(erp, sense);
1580 }
1581 /* 'Environmental Data' */
1582 if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) {
1583 erp_filled = dasd_3990_erp_env_data(erp, sense);
1584 }
1585 /* 'No Record Found' */
1586 if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) {
1587 erp_filled = dasd_3990_erp_no_rec(erp, sense);
1588 }
1589 /* 'File Protected' */
1590 if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) {
1591 erp_filled = dasd_3990_erp_file_prot(erp);
1592 }
1593 /* other (unknown) error - do default ERP */
1594 if (erp_filled == NULL) {
1595
1596 erp_filled = erp;
1597 }
1598
1599 return erp_filled;
1600
1601 } /* END dasd_3990_erp_inspect_24 */
1602
1603 /*
1604 *****************************************************************************
1605 * 32 byte sense ERP functions (only)
1606 *****************************************************************************
1607 */
1608
1609 /*
1610 * DASD_3990_ERPACTION_10_32
1611 *
1612 * DESCRIPTION
1613 * Handles 32 byte 'Action 10' of Single Program Action Codes.
1614 * Just retry and if retry doesn't work, return with error.
1615 *
1616 * PARAMETER
1617 * erp current erp_head
1618 * sense current sense data
1619 * RETURN VALUES
1620 * erp modified erp_head
1621 */
1622 static struct dasd_ccw_req *
1623 dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense)
1624 {
1625
1626 struct dasd_device *device = erp->device;
1627
1628 erp->retries = 256;
1629 erp->function = dasd_3990_erp_action_10_32;
1630
1631 DEV_MESSAGE(KERN_DEBUG, device, "%s", "Perform logging requested");
1632
1633 return erp;
1634
1635 } /* end dasd_3990_erp_action_10_32 */
1636
1637 /*
1638 * DASD_3990_ERP_ACTION_1B_32
1639 *
1640 * DESCRIPTION
1641 * Handles 32 byte 'Action 1B' of Single Program Action Codes.
1642 * A write operation could not be finished because of an unexpected
1643 * condition.
1644 * The already created 'default erp' is used to get the link to
1645 * the erp chain, but it can not be used for this recovery
1646 * action because it contains no DE/LO data space.
1647 *
1648 * PARAMETER
1649 * default_erp already added default erp.
1650 * sense current sense data
1651 *
1652 * RETURN VALUES
1653 * erp new erp or
1654 * default_erp in case of imprecise ending or error
1655 */
1656 static struct dasd_ccw_req *
1657 dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1658 {
1659
1660 struct dasd_device *device = default_erp->device;
1661 __u32 cpa = 0;
1662 struct dasd_ccw_req *cqr;
1663 struct dasd_ccw_req *erp;
1664 struct DE_eckd_data *DE_data;
1665 char *LO_data; /* LO_eckd_data_t */
1666 struct ccw1 *ccw;
1667
1668 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1669 "Write not finished because of unexpected condition");
1670
1671 default_erp->function = dasd_3990_erp_action_1B_32;
1672
1673 /* determine the original cqr */
1674 cqr = default_erp;
1675
1676 while (cqr->refers != NULL) {
1677 cqr = cqr->refers;
1678 }
1679
1680 /* for imprecise ending just do default erp */
1681 if (sense[1] & 0x01) {
1682
1683 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1684 "Imprecise ending is set - just retry");
1685
1686 return default_erp;
1687 }
1688
1689 /* determine the address of the CCW to be restarted */
1690 /* Imprecise ending is not set -> addr from IRB-SCSW */
1691 cpa = default_erp->refers->irb.scsw.cpa;
1692
1693 if (cpa == 0) {
1694
1695 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1696 "Unable to determine address of the CCW "
1697 "to be restarted");
1698
1699 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1700 }
1701
1702 /* Build new ERP request including DE/LO */
1703 erp = dasd_alloc_erp_request((char *) &cqr->magic,
1704 2 + 1,/* DE/LO + TIC */
1705 sizeof (struct DE_eckd_data) +
1706 sizeof (struct LO_eckd_data), device);
1707
1708 if (IS_ERR(erp)) {
1709 DEV_MESSAGE(KERN_ERR, device, "%s", "Unable to allocate ERP");
1710 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1711 }
1712
1713 /* use original DE */
1714 DE_data = erp->data;
1715 memcpy(DE_data, cqr->data, sizeof (struct DE_eckd_data));
1716
1717 /* create LO */
1718 LO_data = erp->data + sizeof (struct DE_eckd_data);
1719
1720 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1721
1722 DEV_MESSAGE(KERN_ERR, device, "%s",
1723 "BUG - this should not happen");
1724
1725 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1726 }
1727
1728 if ((sense[7] & 0x3F) == 0x01) {
1729 /* operation code is WRITE DATA -> data area orientation */
1730 LO_data[0] = 0x81;
1731
1732 } else if ((sense[7] & 0x3F) == 0x03) {
1733 /* operation code is FORMAT WRITE -> index orientation */
1734 LO_data[0] = 0xC3;
1735
1736 } else {
1737 LO_data[0] = sense[7]; /* operation */
1738 }
1739
1740 LO_data[1] = sense[8]; /* auxiliary */
1741 LO_data[2] = sense[9];
1742 LO_data[3] = sense[3]; /* count */
1743 LO_data[4] = sense[29]; /* seek_addr.cyl */
1744 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1745 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1746
1747 memcpy(&(LO_data[8]), &(sense[11]), 8);
1748
1749 /* create DE ccw */
1750 ccw = erp->cpaddr;
1751 memset(ccw, 0, sizeof (struct ccw1));
1752 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
1753 ccw->flags = CCW_FLAG_CC;
1754 ccw->count = 16;
1755 ccw->cda = (__u32)(addr_t) DE_data;
1756
1757 /* create LO ccw */
1758 ccw++;
1759 memset(ccw, 0, sizeof (struct ccw1));
1760 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
1761 ccw->flags = CCW_FLAG_CC;
1762 ccw->count = 16;
1763 ccw->cda = (__u32)(addr_t) LO_data;
1764
1765 /* TIC to the failed ccw */
1766 ccw++;
1767 ccw->cmd_code = CCW_CMD_TIC;
1768 ccw->cda = cpa;
1769
1770 /* fill erp related fields */
1771 erp->function = dasd_3990_erp_action_1B_32;
1772 erp->refers = default_erp->refers;
1773 erp->device = device;
1774 erp->magic = default_erp->magic;
1775 erp->expires = 0;
1776 erp->retries = 256;
1777 erp->buildclk = get_clock();
1778 erp->status = DASD_CQR_FILLED;
1779
1780 /* remove the default erp */
1781 dasd_free_erp_request(default_erp, device);
1782
1783 return erp;
1784
1785 } /* end dasd_3990_erp_action_1B_32 */
1786
1787 /*
1788 * DASD_3990_UPDATE_1B
1789 *
1790 * DESCRIPTION
1791 * Handles the update to the 32 byte 'Action 1B' of Single Program
1792 * Action Codes in case the first action was not successful.
1793 * The already created 'previous_erp' is the currently not successful
1794 * ERP.
1795 *
1796 * PARAMETER
1797 * previous_erp already created previous erp.
1798 * sense current sense data
1799 * RETURN VALUES
1800 * erp modified erp
1801 */
1802 static struct dasd_ccw_req *
1803 dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
1804 {
1805
1806 struct dasd_device *device = previous_erp->device;
1807 __u32 cpa = 0;
1808 struct dasd_ccw_req *cqr;
1809 struct dasd_ccw_req *erp;
1810 char *LO_data; /* struct LO_eckd_data */
1811 struct ccw1 *ccw;
1812
1813 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1814 "Write not finished because of unexpected condition"
1815 " - follow on");
1816
1817 /* determine the original cqr */
1818 cqr = previous_erp;
1819
1820 while (cqr->refers != NULL) {
1821 cqr = cqr->refers;
1822 }
1823
1824 /* for imprecise ending just do default erp */
1825 if (sense[1] & 0x01) {
1826
1827 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1828 "Imprecise ending is set - just retry");
1829
1830 previous_erp->status = DASD_CQR_QUEUED;
1831
1832 return previous_erp;
1833 }
1834
1835 /* determine the address of the CCW to be restarted */
1836 /* Imprecise ending is not set -> addr from IRB-SCSW */
1837 cpa = previous_erp->irb.scsw.cpa;
1838
1839 if (cpa == 0) {
1840
1841 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1842 "Unable to determine address of the CCW "
1843 "to be restarted");
1844
1845 previous_erp->status = DASD_CQR_FAILED;
1846
1847 return previous_erp;
1848 }
1849
1850 erp = previous_erp;
1851
1852 /* update the LO with the new returned sense data */
1853 LO_data = erp->data + sizeof (struct DE_eckd_data);
1854
1855 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1856
1857 DEV_MESSAGE(KERN_ERR, device, "%s",
1858 "BUG - this should not happen");
1859
1860 previous_erp->status = DASD_CQR_FAILED;
1861
1862 return previous_erp;
1863 }
1864
1865 if ((sense[7] & 0x3F) == 0x01) {
1866 /* operation code is WRITE DATA -> data area orientation */
1867 LO_data[0] = 0x81;
1868
1869 } else if ((sense[7] & 0x3F) == 0x03) {
1870 /* operation code is FORMAT WRITE -> index orientation */
1871 LO_data[0] = 0xC3;
1872
1873 } else {
1874 LO_data[0] = sense[7]; /* operation */
1875 }
1876
1877 LO_data[1] = sense[8]; /* auxiliary */
1878 LO_data[2] = sense[9];
1879 LO_data[3] = sense[3]; /* count */
1880 LO_data[4] = sense[29]; /* seek_addr.cyl */
1881 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1882 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1883
1884 memcpy(&(LO_data[8]), &(sense[11]), 8);
1885
1886 /* TIC to the failed ccw */
1887 ccw = erp->cpaddr; /* addr of DE ccw */
1888 ccw++; /* addr of LE ccw */
1889 ccw++; /* addr of TIC ccw */
1890 ccw->cda = cpa;
1891
1892 erp->status = DASD_CQR_QUEUED;
1893
1894 return erp;
1895
1896 } /* end dasd_3990_update_1B */
1897
1898 /*
1899 * DASD_3990_ERP_COMPOUND_RETRY
1900 *
1901 * DESCRIPTION
1902 * Handles the compound ERP action retry code.
1903 * NOTE: At least one retry is done even if zero is specified
1904 * by the sense data. This makes enqueueing of the request
1905 * easier.
1906 *
1907 * PARAMETER
1908 * sense sense data of the actual error
1909 * erp pointer to the currently created ERP
1910 *
1911 * RETURN VALUES
1912 * erp modified ERP pointer
1913 *
1914 */
1915 static void
1916 dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense)
1917 {
1918
1919 switch (sense[25] & 0x03) {
1920 case 0x00: /* no not retry */
1921 erp->retries = 1;
1922 break;
1923
1924 case 0x01: /* retry 2 times */
1925 erp->retries = 2;
1926 break;
1927
1928 case 0x02: /* retry 10 times */
1929 erp->retries = 10;
1930 break;
1931
1932 case 0x03: /* retry 256 times */
1933 erp->retries = 256;
1934 break;
1935
1936 default:
1937 BUG();
1938 }
1939
1940 erp->function = dasd_3990_erp_compound_retry;
1941
1942 } /* end dasd_3990_erp_compound_retry */
1943
1944 /*
1945 * DASD_3990_ERP_COMPOUND_PATH
1946 *
1947 * DESCRIPTION
1948 * Handles the compound ERP action for retry on alternate
1949 * channel path.
1950 *
1951 * PARAMETER
1952 * sense sense data of the actual error
1953 * erp pointer to the currently created ERP
1954 *
1955 * RETURN VALUES
1956 * erp modified ERP pointer
1957 *
1958 */
1959 static void
1960 dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
1961 {
1962
1963 if (sense[25] & DASD_SENSE_BIT_3) {
1964 dasd_3990_erp_alternate_path(erp);
1965
1966 if (erp->status == DASD_CQR_FAILED) {
1967 /* reset the lpm and the status to be able to
1968 * try further actions. */
1969
1970 erp->lpm = 0;
1971
1972 erp->status = DASD_CQR_ERROR;
1973
1974 }
1975 }
1976
1977 erp->function = dasd_3990_erp_compound_path;
1978
1979 } /* end dasd_3990_erp_compound_path */
1980
1981 /*
1982 * DASD_3990_ERP_COMPOUND_CODE
1983 *
1984 * DESCRIPTION
1985 * Handles the compound ERP action for retry code.
1986 *
1987 * PARAMETER
1988 * sense sense data of the actual error
1989 * erp pointer to the currently created ERP
1990 *
1991 * RETURN VALUES
1992 * erp NEW ERP pointer
1993 *
1994 */
1995 static struct dasd_ccw_req *
1996 dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense)
1997 {
1998
1999 if (sense[25] & DASD_SENSE_BIT_2) {
2000
2001 switch (sense[28]) {
2002 case 0x17:
2003 /* issue a Diagnostic Control command with an
2004 * Inhibit Write subcommand and controller modifier */
2005 erp = dasd_3990_erp_DCTL(erp, 0x20);
2006 break;
2007
2008 case 0x25:
2009 /* wait for 5 seconds and retry again */
2010 erp->retries = 1;
2011
2012 dasd_3990_erp_block_queue (erp, 5*HZ);
2013 break;
2014
2015 default:
2016 /* should not happen - continue */
2017 break;
2018 }
2019 }
2020
2021 erp->function = dasd_3990_erp_compound_code;
2022
2023 return erp;
2024
2025 } /* end dasd_3990_erp_compound_code */
2026
2027 /*
2028 * DASD_3990_ERP_COMPOUND_CONFIG
2029 *
2030 * DESCRIPTION
2031 * Handles the compound ERP action for configruation
2032 * dependent error.
2033 * Note: duplex handling is not implemented (yet).
2034 *
2035 * PARAMETER
2036 * sense sense data of the actual error
2037 * erp pointer to the currently created ERP
2038 *
2039 * RETURN VALUES
2040 * erp modified ERP pointer
2041 *
2042 */
2043 static void
2044 dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
2045 {
2046
2047 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) {
2048
2049 /* set to suspended duplex state then restart */
2050 struct dasd_device *device = erp->device;
2051
2052 DEV_MESSAGE(KERN_ERR, device, "%s",
2053 "Set device to suspended duplex state should be "
2054 "done!\n"
2055 "This is not implemented yet (for compound ERP)"
2056 " - please report to linux390@de.ibm.com");
2057
2058 }
2059
2060 erp->function = dasd_3990_erp_compound_config;
2061
2062 } /* end dasd_3990_erp_compound_config */
2063
2064 /*
2065 * DASD_3990_ERP_COMPOUND
2066 *
2067 * DESCRIPTION
2068 * Does the further compound program action if
2069 * compound retry was not successful.
2070 *
2071 * PARAMETER
2072 * sense sense data of the actual error
2073 * erp pointer to the current (failed) ERP
2074 *
2075 * RETURN VALUES
2076 * erp (additional) ERP pointer
2077 *
2078 */
2079 static struct dasd_ccw_req *
2080 dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense)
2081 {
2082
2083 if ((erp->function == dasd_3990_erp_compound_retry) &&
2084 (erp->status == DASD_CQR_ERROR)) {
2085
2086 dasd_3990_erp_compound_path(erp, sense);
2087 }
2088
2089 if ((erp->function == dasd_3990_erp_compound_path) &&
2090 (erp->status == DASD_CQR_ERROR)) {
2091
2092 erp = dasd_3990_erp_compound_code(erp, sense);
2093 }
2094
2095 if ((erp->function == dasd_3990_erp_compound_code) &&
2096 (erp->status == DASD_CQR_ERROR)) {
2097
2098 dasd_3990_erp_compound_config(erp, sense);
2099 }
2100
2101 /* if no compound action ERP specified, the request failed */
2102 if (erp->status == DASD_CQR_ERROR) {
2103
2104 erp->status = DASD_CQR_FAILED;
2105 }
2106
2107 return erp;
2108
2109 } /* end dasd_3990_erp_compound */
2110
2111 /*
2112 * DASD_3990_ERP_INSPECT_32
2113 *
2114 * DESCRIPTION
2115 * Does a detailed inspection of the 32 byte sense data
2116 * and sets up a related error recovery action.
2117 *
2118 * PARAMETER
2119 * sense sense data of the actual error
2120 * erp pointer to the currently created default ERP
2121 *
2122 * RETURN VALUES
2123 * erp_filled pointer to the ERP
2124 *
2125 */
2126 static struct dasd_ccw_req *
2127 dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
2128 {
2129
2130 struct dasd_device *device = erp->device;
2131
2132 erp->function = dasd_3990_erp_inspect_32;
2133
2134 if (sense[25] & DASD_SENSE_BIT_0) {
2135
2136 /* compound program action codes (byte25 bit 0 == '1') */
2137 dasd_3990_erp_compound_retry(erp, sense);
2138
2139 } else {
2140
2141 /* single program action codes (byte25 bit 0 == '0') */
2142 switch (sense[25]) {
2143
2144 case 0x00: /* success - use default ERP for retries */
2145 DEV_MESSAGE(KERN_DEBUG, device, "%s",
2146 "ERP called for successful request"
2147 " - just retry");
2148 break;
2149
2150 case 0x01: /* fatal error */
2151 DEV_MESSAGE(KERN_ERR, device, "%s",
2152 "Fatal error should have been "
2153 "handled within the interrupt handler");
2154
2155 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2156 break;
2157
2158 case 0x02: /* intervention required */
2159 case 0x03: /* intervention required during dual copy */
2160 erp = dasd_3990_erp_int_req(erp);
2161 break;
2162
2163 case 0x0F: /* length mismatch during update write command */
2164 DEV_MESSAGE(KERN_ERR, device, "%s",
2165 "update write command error - should not "
2166 "happen;\n"
2167 "Please send this message together with "
2168 "the above sense data to linux390@de."
2169 "ibm.com");
2170
2171 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2172 break;
2173
2174 case 0x10: /* logging required for other channel program */
2175 erp = dasd_3990_erp_action_10_32(erp, sense);
2176 break;
2177
2178 case 0x15: /* next track outside defined extend */
2179 DEV_MESSAGE(KERN_ERR, device, "%s",
2180 "next track outside defined extend - "
2181 "should not happen;\n"
2182 "Please send this message together with "
2183 "the above sense data to linux390@de."
2184 "ibm.com");
2185
2186 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2187 break;
2188
2189 case 0x1B: /* unexpected condition during write */
2190
2191 erp = dasd_3990_erp_action_1B_32(erp, sense);
2192 break;
2193
2194 case 0x1C: /* invalid data */
2195 DEV_MESSAGE(KERN_EMERG, device, "%s",
2196 "Data recovered during retry with PCI "
2197 "fetch mode active");
2198
2199 /* not possible to handle this situation in Linux */
2200 panic
2201 ("Invalid data - No way to inform application "
2202 "about the possibly incorrect data");
2203 break;
2204
2205 case 0x1D: /* state-change pending */
2206 DEV_MESSAGE(KERN_DEBUG, device, "%s",
2207 "A State change pending condition exists "
2208 "for the subsystem or device");
2209
2210 erp = dasd_3990_erp_action_4(erp, sense);
2211 break;
2212
2213 case 0x1E: /* busy */
2214 DEV_MESSAGE(KERN_DEBUG, device, "%s",
2215 "Busy condition exists "
2216 "for the subsystem or device");
2217 erp = dasd_3990_erp_action_4(erp, sense);
2218 break;
2219
2220 default: /* all others errors - default erp */
2221 break;
2222 }
2223 }
2224
2225 return erp;
2226
2227 } /* end dasd_3990_erp_inspect_32 */
2228
2229 /*
2230 *****************************************************************************
2231 * main ERP control fuctions (24 and 32 byte sense)
2232 *****************************************************************************
2233 */
2234
2235 /*
2236 * DASD_3990_ERP_INSPECT
2237 *
2238 * DESCRIPTION
2239 * Does a detailed inspection for sense data by calling either
2240 * the 24-byte or the 32-byte inspection routine.
2241 *
2242 * PARAMETER
2243 * erp pointer to the currently created default ERP
2244 * RETURN VALUES
2245 * erp_new contens was possibly modified
2246 */
2247 static struct dasd_ccw_req *
2248 dasd_3990_erp_inspect(struct dasd_ccw_req * erp)
2249 {
2250
2251 struct dasd_ccw_req *erp_new = NULL;
2252 /* sense data are located in the refers record of the */
2253 /* already set up new ERP ! */
2254 char *sense = erp->refers->irb.ecw;
2255
2256 /* distinguish between 24 and 32 byte sense data */
2257 if (sense[27] & DASD_SENSE_BIT_0) {
2258
2259 /* inspect the 24 byte sense data */
2260 erp_new = dasd_3990_erp_inspect_24(erp, sense);
2261
2262 } else {
2263
2264 /* inspect the 32 byte sense data */
2265 erp_new = dasd_3990_erp_inspect_32(erp, sense);
2266
2267 } /* end distinguish between 24 and 32 byte sense data */
2268
2269 return erp_new;
2270 }
2271
2272 /*
2273 * DASD_3990_ERP_ADD_ERP
2274 *
2275 * DESCRIPTION
2276 * This funtion adds an additional request block (ERP) to the head of
2277 * the given cqr (or erp).
2278 * This erp is initialized as an default erp (retry TIC)
2279 *
2280 * PARAMETER
2281 * cqr head of the current ERP-chain (or single cqr if
2282 * first error)
2283 * RETURN VALUES
2284 * erp pointer to new ERP-chain head
2285 */
2286 static struct dasd_ccw_req *
2287 dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr)
2288 {
2289
2290 struct dasd_device *device = cqr->device;
2291 struct ccw1 *ccw;
2292
2293 /* allocate additional request block */
2294 struct dasd_ccw_req *erp;
2295
2296 erp = dasd_alloc_erp_request((char *) &cqr->magic, 2, 0, cqr->device);
2297 if (IS_ERR(erp)) {
2298 if (cqr->retries <= 0) {
2299 DEV_MESSAGE(KERN_ERR, device, "%s",
2300 "Unable to allocate ERP request");
2301 cqr->status = DASD_CQR_FAILED;
2302 cqr->stopclk = get_clock ();
2303 } else {
2304 DEV_MESSAGE (KERN_ERR, device,
2305 "Unable to allocate ERP request "
2306 "(%i retries left)",
2307 cqr->retries);
2308 dasd_set_timer(device, (HZ << 3));
2309 }
2310 return cqr;
2311 }
2312
2313 /* initialize request with default TIC to current ERP/CQR */
2314 ccw = erp->cpaddr;
2315 ccw->cmd_code = CCW_CMD_NOOP;
2316 ccw->flags = CCW_FLAG_CC;
2317 ccw++;
2318 ccw->cmd_code = CCW_CMD_TIC;
2319 ccw->cda = (long)(cqr->cpaddr);
2320 erp->function = dasd_3990_erp_add_erp;
2321 erp->refers = cqr;
2322 erp->device = cqr->device;
2323 erp->magic = cqr->magic;
2324 erp->expires = 0;
2325 erp->retries = 256;
2326 erp->buildclk = get_clock();
2327
2328 erp->status = DASD_CQR_FILLED;
2329
2330 return erp;
2331 }
2332
2333 /*
2334 * DASD_3990_ERP_ADDITIONAL_ERP
2335 *
2336 * DESCRIPTION
2337 * An additional ERP is needed to handle the current error.
2338 * Add ERP to the head of the ERP-chain containing the ERP processing
2339 * determined based on the sense data.
2340 *
2341 * PARAMETER
2342 * cqr head of the current ERP-chain (or single cqr if
2343 * first error)
2344 *
2345 * RETURN VALUES
2346 * erp pointer to new ERP-chain head
2347 */
2348 static struct dasd_ccw_req *
2349 dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr)
2350 {
2351
2352 struct dasd_ccw_req *erp = NULL;
2353
2354 /* add erp and initialize with default TIC */
2355 erp = dasd_3990_erp_add_erp(cqr);
2356
2357 /* inspect sense, determine specific ERP if possible */
2358 if (erp != cqr) {
2359
2360 erp = dasd_3990_erp_inspect(erp);
2361 }
2362
2363 return erp;
2364
2365 } /* end dasd_3990_erp_additional_erp */
2366
2367 /*
2368 * DASD_3990_ERP_ERROR_MATCH
2369 *
2370 * DESCRIPTION
2371 * Check if the device status of the given cqr is the same.
2372 * This means that the failed CCW and the relevant sense data
2373 * must match.
2374 * I don't distinguish between 24 and 32 byte sense because in case of
2375 * 24 byte sense byte 25 and 27 is set as well.
2376 *
2377 * PARAMETER
2378 * cqr1 first cqr, which will be compared with the
2379 * cqr2 second cqr.
2380 *
2381 * RETURN VALUES
2382 * match 'boolean' for match found
2383 * returns 1 if match found, otherwise 0.
2384 */
2385 static int
2386 dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, struct dasd_ccw_req *cqr2)
2387 {
2388
2389 /* check failed CCW */
2390 if (cqr1->irb.scsw.cpa != cqr2->irb.scsw.cpa) {
2391 // return 0; /* CCW doesn't match */
2392 }
2393
2394 /* check sense data; byte 0-2,25,27 */
2395 if (!((memcmp (cqr1->irb.ecw, cqr2->irb.ecw, 3) == 0) &&
2396 (cqr1->irb.ecw[27] == cqr2->irb.ecw[27]) &&
2397 (cqr1->irb.ecw[25] == cqr2->irb.ecw[25]))) {
2398
2399 return 0; /* sense doesn't match */
2400 }
2401
2402 return 1; /* match */
2403
2404 } /* end dasd_3990_erp_error_match */
2405
2406 /*
2407 * DASD_3990_ERP_IN_ERP
2408 *
2409 * DESCRIPTION
2410 * check if the current error already happened before.
2411 * quick exit if current cqr is not an ERP (cqr->refers=NULL)
2412 *
2413 * PARAMETER
2414 * cqr failed cqr (either original cqr or already an erp)
2415 *
2416 * RETURN VALUES
2417 * erp erp-pointer to the already defined error
2418 * recovery procedure OR
2419 * NULL if a 'new' error occurred.
2420 */
2421 static struct dasd_ccw_req *
2422 dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr)
2423 {
2424
2425 struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */
2426 *erp_match = NULL; /* save erp chain head */
2427 int match = 0; /* 'boolean' for matching error found */
2428
2429 if (cqr->refers == NULL) { /* return if not in erp */
2430 return NULL;
2431 }
2432
2433 /* check the erp/cqr chain for current error */
2434 do {
2435 match = dasd_3990_erp_error_match(erp_head, cqr->refers);
2436 erp_match = cqr; /* save possible matching erp */
2437 cqr = cqr->refers; /* check next erp/cqr in queue */
2438
2439 } while ((cqr->refers != NULL) && (!match));
2440
2441 if (!match) {
2442 return NULL; /* no match was found */
2443 }
2444
2445 return erp_match; /* return address of matching erp */
2446
2447 } /* END dasd_3990_erp_in_erp */
2448
2449 /*
2450 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense)
2451 *
2452 * DESCRIPTION
2453 * No retry is left for the current ERP. Check what has to be done
2454 * with the ERP.
2455 * - do further defined ERP action or
2456 * - wait for interrupt or
2457 * - exit with permanent error
2458 *
2459 * PARAMETER
2460 * erp ERP which is in progress with no retry left
2461 *
2462 * RETURN VALUES
2463 * erp modified/additional ERP
2464 */
2465 static struct dasd_ccw_req *
2466 dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
2467 {
2468
2469 struct dasd_device *device = erp->device;
2470 char *sense = erp->irb.ecw;
2471
2472 /* check for 24 byte sense ERP */
2473 if ((erp->function == dasd_3990_erp_bus_out) ||
2474 (erp->function == dasd_3990_erp_action_1) ||
2475 (erp->function == dasd_3990_erp_action_4)) {
2476
2477 erp = dasd_3990_erp_action_1(erp);
2478
2479 } else if (erp->function == dasd_3990_erp_action_5) {
2480
2481 /* retries have not been successful */
2482 /* prepare erp for retry on different channel path */
2483 erp = dasd_3990_erp_action_1(erp);
2484
2485 if (!(sense[2] & DASD_SENSE_BIT_0)) {
2486
2487 /* issue a Diagnostic Control command with an
2488 * Inhibit Write subcommand */
2489
2490 switch (sense[25]) {
2491 case 0x17:
2492 case 0x57:{ /* controller */
2493 erp = dasd_3990_erp_DCTL(erp, 0x20);
2494 break;
2495 }
2496 case 0x18:
2497 case 0x58:{ /* channel path */
2498 erp = dasd_3990_erp_DCTL(erp, 0x40);
2499 break;
2500 }
2501 case 0x19:
2502 case 0x59:{ /* storage director */
2503 erp = dasd_3990_erp_DCTL(erp, 0x80);
2504 break;
2505 }
2506 default:
2507 DEV_MESSAGE(KERN_DEBUG, device,
2508 "invalid subcommand modifier 0x%x "
2509 "for Diagnostic Control Command",
2510 sense[25]);
2511 }
2512 }
2513
2514 /* check for 32 byte sense ERP */
2515 } else if ((erp->function == dasd_3990_erp_compound_retry) ||
2516 (erp->function == dasd_3990_erp_compound_path) ||
2517 (erp->function == dasd_3990_erp_compound_code) ||
2518 (erp->function == dasd_3990_erp_compound_config)) {
2519
2520 erp = dasd_3990_erp_compound(erp, sense);
2521
2522 } else {
2523 /* No retry left and no additional special handling */
2524 /*necessary */
2525 DEV_MESSAGE(KERN_ERR, device,
2526 "no retries left for erp %p - "
2527 "set status to FAILED", erp);
2528
2529 erp->status = DASD_CQR_FAILED;
2530 }
2531
2532 return erp;
2533
2534 } /* end dasd_3990_erp_further_erp */
2535
2536 /*
2537 * DASD_3990_ERP_HANDLE_MATCH_ERP
2538 *
2539 * DESCRIPTION
2540 * An error occurred again and an ERP has been detected which is already
2541 * used to handle this error (e.g. retries).
2542 * All prior ERP's are asumed to be successful and therefore removed
2543 * from queue.
2544 * If retry counter of matching erp is already 0, it is checked if further
2545 * action is needed (besides retry) or if the ERP has failed.
2546 *
2547 * PARAMETER
2548 * erp_head first ERP in ERP-chain
2549 * erp ERP that handles the actual error.
2550 * (matching erp)
2551 *
2552 * RETURN VALUES
2553 * erp modified/additional ERP
2554 */
2555 static struct dasd_ccw_req *
2556 dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
2557 struct dasd_ccw_req *erp)
2558 {
2559
2560 struct dasd_device *device = erp_head->device;
2561 struct dasd_ccw_req *erp_done = erp_head; /* finished req */
2562 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */
2563
2564 /* loop over successful ERPs and remove them from chanq */
2565 while (erp_done != erp) {
2566
2567 if (erp_done == NULL) /* end of chain reached */
2568 panic(PRINTK_HEADER "Programming error in ERP! The "
2569 "original request was lost\n");
2570
2571 /* remove the request from the device queue */
2572 list_del(&erp_done->list);
2573
2574 erp_free = erp_done;
2575 erp_done = erp_done->refers;
2576
2577 /* free the finished erp request */
2578 dasd_free_erp_request(erp_free, erp_free->device);
2579
2580 } /* end while */
2581
2582 if (erp->retries > 0) {
2583
2584 char *sense = erp->refers->irb.ecw;
2585
2586 /* check for special retries */
2587 if (erp->function == dasd_3990_erp_action_4) {
2588
2589 erp = dasd_3990_erp_action_4(erp, sense);
2590
2591 } else if (erp->function == dasd_3990_erp_action_1B_32) {
2592
2593 erp = dasd_3990_update_1B(erp, sense);
2594
2595 } else if (erp->function == dasd_3990_erp_int_req) {
2596
2597 erp = dasd_3990_erp_int_req(erp);
2598
2599 } else {
2600 /* simple retry */
2601 DEV_MESSAGE(KERN_DEBUG, device,
2602 "%i retries left for erp %p",
2603 erp->retries, erp);
2604
2605 /* handle the request again... */
2606 erp->status = DASD_CQR_QUEUED;
2607 }
2608
2609 } else {
2610 /* no retry left - check for further necessary action */
2611 /* if no further actions, handle rest as permanent error */
2612 erp = dasd_3990_erp_further_erp(erp);
2613 }
2614
2615 return erp;
2616
2617 } /* end dasd_3990_erp_handle_match_erp */
2618
2619 /*
2620 * DASD_3990_ERP_ACTION
2621 *
2622 * DESCRIPTION
2623 * controll routine for 3990 erp actions.
2624 * Has to be called with the queue lock (namely the s390_irq_lock) acquired.
2625 *
2626 * PARAMETER
2627 * cqr failed cqr (either original cqr or already an erp)
2628 *
2629 * RETURN VALUES
2630 * erp erp-pointer to the head of the ERP action chain.
2631 * This means:
2632 * - either a ptr to an additional ERP cqr or
2633 * - the original given cqr (which's status might
2634 * be modified)
2635 */
2636 struct dasd_ccw_req *
2637 dasd_3990_erp_action(struct dasd_ccw_req * cqr)
2638 {
2639
2640 struct dasd_ccw_req *erp = NULL;
2641 struct dasd_device *device = cqr->device;
2642 struct dasd_ccw_req *temp_erp = NULL;
2643
2644 if (device->features & DASD_FEATURE_ERPLOG) {
2645 /* print current erp_chain */
2646 DEV_MESSAGE(KERN_ERR, device, "%s",
2647 "ERP chain at BEGINNING of ERP-ACTION");
2648 for (temp_erp = cqr;
2649 temp_erp != NULL; temp_erp = temp_erp->refers) {
2650
2651 DEV_MESSAGE(KERN_ERR, device,
2652 " erp %p (%02x) refers to %p",
2653 temp_erp, temp_erp->status,
2654 temp_erp->refers);
2655 }
2656 }
2657
2658 /* double-check if current erp/cqr was successfull */
2659 if ((cqr->irb.scsw.cstat == 0x00) &&
2660 (cqr->irb.scsw.dstat == (DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2661
2662 DEV_MESSAGE(KERN_DEBUG, device,
2663 "ERP called for successful request %p"
2664 " - NO ERP necessary", cqr);
2665
2666 cqr->status = DASD_CQR_DONE;
2667
2668 return cqr;
2669 }
2670 /* check if sense data are available */
2671 if (!cqr->irb.ecw) {
2672 DEV_MESSAGE(KERN_DEBUG, device,
2673 "ERP called witout sense data avail ..."
2674 "request %p - NO ERP possible", cqr);
2675
2676 cqr->status = DASD_CQR_FAILED;
2677
2678 return cqr;
2679
2680 }
2681
2682 /* check if error happened before */
2683 erp = dasd_3990_erp_in_erp(cqr);
2684
2685 if (erp == NULL) {
2686 /* no matching erp found - set up erp */
2687 erp = dasd_3990_erp_additional_erp(cqr);
2688 } else {
2689 /* matching erp found - set all leading erp's to DONE */
2690 erp = dasd_3990_erp_handle_match_erp(cqr, erp);
2691 }
2692
2693 if (device->features & DASD_FEATURE_ERPLOG) {
2694 /* print current erp_chain */
2695 DEV_MESSAGE(KERN_ERR, device, "%s",
2696 "ERP chain at END of ERP-ACTION");
2697 for (temp_erp = erp;
2698 temp_erp != NULL; temp_erp = temp_erp->refers) {
2699
2700 DEV_MESSAGE(KERN_ERR, device,
2701 " erp %p (%02x) refers to %p",
2702 temp_erp, temp_erp->status,
2703 temp_erp->refers);
2704 }
2705 }
2706
2707 /* enqueue added ERP request */
2708 if (erp->status == DASD_CQR_FILLED) {
2709 erp->status = DASD_CQR_QUEUED;
2710 list_add(&erp->list, &device->ccw_queue);
2711 }
2712
2713 return erp;
2714
2715 } /* end dasd_3990_erp_action */
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