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Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / s390 / block / dasd_3990_erp.c
blobc143ecb53d9d1e750975b4caa3120345a69737bd
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 * $Revision: 1.36 $
9 */
10
11 #include <linux/timer.h>
12 #include <linux/slab.h>
13 #include <asm/idals.h>
14 #include <asm/todclk.h>
15
16 #define PRINTK_HEADER "dasd_erp(3990): "
17
18 #include "dasd_int.h"
19 #include "dasd_eckd.h"
20
21
22 struct DCTL_data {
23 unsigned char subcommand; /* e.g Inhibit Write, Enable Write,... */
24 unsigned char modifier; /* Subcommand modifier */
25 unsigned short res; /* reserved */
26 } __attribute__ ((packed));
27
28 /*
29 *****************************************************************************
30 * SECTION ERP EXAMINATION
31 *****************************************************************************
32 */
33
34 /*
35 * DASD_3990_ERP_EXAMINE_24
36 *
37 * DESCRIPTION
38 * Checks only for fatal (unrecoverable) error.
39 * A detailed examination of the sense data is done later outside
40 * the interrupt handler.
41 *
42 * Each bit configuration leading to an action code 2 (Exit with
43 * programming error or unusual condition indication)
44 * are handled as fatal error´s.
45 *
46 * All other configurations are handled as recoverable errors.
47 *
48 * RETURN VALUES
49 * dasd_era_fatal for all fatal (unrecoverable errors)
50 * dasd_era_recover for all others.
51 */
52 static dasd_era_t
53 dasd_3990_erp_examine_24(struct dasd_ccw_req * cqr, char *sense)
54 {
55
56 struct dasd_device *device = cqr->device;
57
58 /* check for 'Command Reject' */
59 if ((sense[0] & SNS0_CMD_REJECT) &&
60 (!(sense[2] & SNS2_ENV_DATA_PRESENT))) {
61
62 DEV_MESSAGE(KERN_ERR, device, "%s",
63 "EXAMINE 24: Command Reject detected - "
64 "fatal error");
65
66 return dasd_era_fatal;
67 }
68
69 /* check for 'Invalid Track Format' */
70 if ((sense[1] & SNS1_INV_TRACK_FORMAT) &&
71 (!(sense[2] & SNS2_ENV_DATA_PRESENT))) {
72
73 DEV_MESSAGE(KERN_ERR, device, "%s",
74 "EXAMINE 24: Invalid Track Format detected "
75 "- fatal error");
76
77 return dasd_era_fatal;
78 }
79
80 /* check for 'No Record Found' */
81 if (sense[1] & SNS1_NO_REC_FOUND) {
82
83 /* FIXME: fatal error ?!? */
84 DEV_MESSAGE(KERN_ERR, device,
85 "EXAMINE 24: No Record Found detected %s",
86 device->state <= DASD_STATE_BASIC ?
87 " " : "- fatal error");
88
89 return dasd_era_fatal;
90 }
91
92 /* return recoverable for all others */
93 return dasd_era_recover;
94 } /* END dasd_3990_erp_examine_24 */
95
96 /*
97 * DASD_3990_ERP_EXAMINE_32
98 *
99 * DESCRIPTION
100 * Checks only for fatal/no/recoverable error.
101 * A detailed examination of the sense data is done later outside
102 * the interrupt handler.
103 *
104 * RETURN VALUES
105 * dasd_era_none no error
106 * dasd_era_fatal for all fatal (unrecoverable errors)
107 * dasd_era_recover for recoverable others.
108 */
109 static dasd_era_t
110 dasd_3990_erp_examine_32(struct dasd_ccw_req * cqr, char *sense)
111 {
112
113 struct dasd_device *device = cqr->device;
114
115 switch (sense[25]) {
116 case 0x00:
117 return dasd_era_none;
118
119 case 0x01:
120 DEV_MESSAGE(KERN_ERR, device, "%s", "EXAMINE 32: fatal error");
121
122 return dasd_era_fatal;
123
124 default:
125
126 return dasd_era_recover;
127 }
128
129 } /* end dasd_3990_erp_examine_32 */
130
131 /*
132 * DASD_3990_ERP_EXAMINE
133 *
134 * DESCRIPTION
135 * Checks only for fatal/no/recover error.
136 * A detailed examination of the sense data is done later outside
137 * the interrupt handler.
138 *
139 * The logic is based on the 'IBM 3990 Storage Control Reference' manual
140 * 'Chapter 7. Error Recovery Procedures'.
141 *
142 * RETURN VALUES
143 * dasd_era_none no error
144 * dasd_era_fatal for all fatal (unrecoverable errors)
145 * dasd_era_recover for all others.
146 */
147 dasd_era_t
148 dasd_3990_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb)
149 {
150
151 char *sense = irb->ecw;
152 dasd_era_t era = dasd_era_recover;
153 struct dasd_device *device = cqr->device;
154
155 /* check for successful execution first */
156 if (irb->scsw.cstat == 0x00 &&
157 irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
158 return dasd_era_none;
159
160 /* distinguish between 24 and 32 byte sense data */
161 if (sense[27] & DASD_SENSE_BIT_0) {
162
163 era = dasd_3990_erp_examine_24(cqr, sense);
164
165 } else {
166
167 era = dasd_3990_erp_examine_32(cqr, sense);
168
169 }
170
171 /* log the erp chain if fatal error occurred */
172 if ((era == dasd_era_fatal) && (device->state >= DASD_STATE_READY)) {
173 dasd_log_sense(cqr, irb);
174 dasd_log_ccw(cqr, 0, irb->scsw.cpa);
175 }
176
177 return era;
178
179 } /* END dasd_3990_erp_examine */
180
181 /*
182 *****************************************************************************
183 * SECTION ERP HANDLING
184 *****************************************************************************
185 */
186 /*
187 *****************************************************************************
188 * 24 and 32 byte sense ERP functions
189 *****************************************************************************
190 */
191
192 /*
193 * DASD_3990_ERP_CLEANUP
194 *
195 * DESCRIPTION
196 * Removes the already build but not necessary ERP request and sets
197 * the status of the original cqr / erp to the given (final) status
198 *
199 * PARAMETER
200 * erp request to be blocked
201 * final_status either DASD_CQR_DONE or DASD_CQR_FAILED
202 *
203 * RETURN VALUES
204 * cqr original cqr
205 */
206 static struct dasd_ccw_req *
207 dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status)
208 {
209 struct dasd_ccw_req *cqr = erp->refers;
210
211 dasd_free_erp_request(erp, erp->device);
212 cqr->status = final_status;
213 return cqr;
214
215 } /* end dasd_3990_erp_cleanup */
216
217 /*
218 * DASD_3990_ERP_BLOCK_QUEUE
219 *
220 * DESCRIPTION
221 * Block the given device request queue to prevent from further
222 * processing until the started timer has expired or an related
223 * interrupt was received.
224 */
225 static void
226 dasd_3990_erp_block_queue(struct dasd_ccw_req * erp, int expires)
227 {
228
229 struct dasd_device *device = erp->device;
230
231 DEV_MESSAGE(KERN_INFO, device,
232 "blocking request queue for %is", expires/HZ);
233
234 device->stopped |= DASD_STOPPED_PENDING;
235 erp->status = DASD_CQR_QUEUED;
236
237 dasd_set_timer(device, expires);
238 }
239
240 /*
241 * DASD_3990_ERP_INT_REQ
242 *
243 * DESCRIPTION
244 * Handles 'Intervention Required' error.
245 * This means either device offline or not installed.
246 *
247 * PARAMETER
248 * erp current erp
249 * RETURN VALUES
250 * erp modified erp
251 */
252 static struct dasd_ccw_req *
253 dasd_3990_erp_int_req(struct dasd_ccw_req * erp)
254 {
255
256 struct dasd_device *device = erp->device;
257
258 /* first time set initial retry counter and erp_function */
259 /* and retry once without blocking queue */
260 /* (this enables easier enqueing of the cqr) */
261 if (erp->function != dasd_3990_erp_int_req) {
262
263 erp->retries = 256;
264 erp->function = dasd_3990_erp_int_req;
265
266 } else {
267
268 /* issue a message and wait for 'device ready' interrupt */
269 DEV_MESSAGE(KERN_ERR, device, "%s",
270 "is offline or not installed - "
271 "INTERVENTION REQUIRED!!");
272
273 dasd_3990_erp_block_queue(erp, 60*HZ);
274 }
275
276 return erp;
277
278 } /* end dasd_3990_erp_int_req */
279
280 /*
281 * DASD_3990_ERP_ALTERNATE_PATH
282 *
283 * DESCRIPTION
284 * Repeat the operation on a different channel path.
285 * If all alternate paths have been tried, the request is posted with a
286 * permanent error.
287 *
288 * PARAMETER
289 * erp pointer to the current ERP
290 *
291 * RETURN VALUES
292 * erp modified pointer to the ERP
293 */
294 static void
295 dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp)
296 {
297 struct dasd_device *device = erp->device;
298 __u8 opm;
299
300 /* try alternate valid path */
301 opm = ccw_device_get_path_mask(device->cdev);
302 //FIXME: start with get_opm ?
303 if (erp->lpm == 0)
304 erp->lpm = LPM_ANYPATH & ~(erp->irb.esw.esw0.sublog.lpum);
305 else
306 erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum);
307
308 if ((erp->lpm & opm) != 0x00) {
309
310 DEV_MESSAGE(KERN_DEBUG, device,
311 "try alternate lpm=%x (lpum=%x / opm=%x)",
312 erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm);
313
314 /* reset status to queued to handle the request again... */
315 if (erp->status > DASD_CQR_QUEUED)
316 erp->status = DASD_CQR_QUEUED;
317 erp->retries = 1;
318 } else {
319 DEV_MESSAGE(KERN_ERR, device,
320 "No alternate channel path left (lpum=%x / "
321 "opm=%x) -> permanent error",
322 erp->irb.esw.esw0.sublog.lpum, opm);
323
324 /* post request with permanent error */
325 if (erp->status > DASD_CQR_QUEUED)
326 erp->status = DASD_CQR_FAILED;
327 }
328 } /* end dasd_3990_erp_alternate_path */
329
330 /*
331 * DASD_3990_ERP_DCTL
332 *
333 * DESCRIPTION
334 * Setup cqr to do the Diagnostic Control (DCTL) command with an
335 * Inhibit Write subcommand (0x20) and the given modifier.
336 *
337 * PARAMETER
338 * erp pointer to the current (failed) ERP
339 * modifier subcommand modifier
340 *
341 * RETURN VALUES
342 * dctl_cqr pointer to NEW dctl_cqr
343 *
344 */
345 static struct dasd_ccw_req *
346 dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier)
347 {
348
349 struct dasd_device *device = erp->device;
350 struct DCTL_data *DCTL_data;
351 struct ccw1 *ccw;
352 struct dasd_ccw_req *dctl_cqr;
353
354 dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1,
355 sizeof (struct DCTL_data),
356 erp->device);
357 if (IS_ERR(dctl_cqr)) {
358 DEV_MESSAGE(KERN_ERR, device, "%s",
359 "Unable to allocate DCTL-CQR");
360 erp->status = DASD_CQR_FAILED;
361 return erp;
362 }
363
364 DCTL_data = dctl_cqr->data;
365
366 DCTL_data->subcommand = 0x02; /* Inhibit Write */
367 DCTL_data->modifier = modifier;
368
369 ccw = dctl_cqr->cpaddr;
370 memset(ccw, 0, sizeof (struct ccw1));
371 ccw->cmd_code = CCW_CMD_DCTL;
372 ccw->count = 4;
373 ccw->cda = (__u32)(addr_t) DCTL_data;
374 dctl_cqr->function = dasd_3990_erp_DCTL;
375 dctl_cqr->refers = erp;
376 dctl_cqr->device = erp->device;
377 dctl_cqr->magic = erp->magic;
378 dctl_cqr->expires = 5 * 60 * HZ;
379 dctl_cqr->retries = 2;
380
381 dctl_cqr->buildclk = get_clock();
382
383 dctl_cqr->status = DASD_CQR_FILLED;
384
385 return dctl_cqr;
386
387 } /* end dasd_3990_erp_DCTL */
388
389 /*
390 * DASD_3990_ERP_ACTION_1
391 *
392 * DESCRIPTION
393 * Setup ERP to do the ERP action 1 (see Reference manual).
394 * Repeat the operation on a different channel path.
395 * If all alternate paths have been tried, the request is posted with a
396 * permanent error.
397 * Note: duplex handling is not implemented (yet).
398 *
399 * PARAMETER
400 * erp pointer to the current ERP
401 *
402 * RETURN VALUES
403 * erp pointer to the ERP
404 *
405 */
406 static struct dasd_ccw_req *
407 dasd_3990_erp_action_1(struct dasd_ccw_req * erp)
408 {
409
410 erp->function = dasd_3990_erp_action_1;
411
412 dasd_3990_erp_alternate_path(erp);
413
414 return erp;
415
416 } /* end dasd_3990_erp_action_1 */
417
418 /*
419 * DASD_3990_ERP_ACTION_4
420 *
421 * DESCRIPTION
422 * Setup ERP to do the ERP action 4 (see Reference manual).
423 * Set the current request to PENDING to block the CQR queue for that device
424 * until the state change interrupt appears.
425 * Use a timer (20 seconds) to retry the cqr if the interrupt is still
426 * missing.
427 *
428 * PARAMETER
429 * sense sense data of the actual error
430 * erp pointer to the current ERP
431 *
432 * RETURN VALUES
433 * erp pointer to the ERP
434 *
435 */
436 static struct dasd_ccw_req *
437 dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense)
438 {
439
440 struct dasd_device *device = erp->device;
441
442 /* first time set initial retry counter and erp_function */
443 /* and retry once without waiting for state change pending */
444 /* interrupt (this enables easier enqueing of the cqr) */
445 if (erp->function != dasd_3990_erp_action_4) {
446
447 DEV_MESSAGE(KERN_INFO, device, "%s",
448 "dasd_3990_erp_action_4: first time retry");
449
450 erp->retries = 256;
451 erp->function = dasd_3990_erp_action_4;
452
453 } else {
454
455 if (sense[25] == 0x1D) { /* state change pending */
456
457 DEV_MESSAGE(KERN_INFO, device,
458 "waiting for state change pending "
459 "interrupt, %d retries left",
460 erp->retries);
461
462 dasd_3990_erp_block_queue(erp, 30*HZ);
463
464 } else if (sense[25] == 0x1E) { /* busy */
465 DEV_MESSAGE(KERN_INFO, device,
466 "busy - redriving request later, "
467 "%d retries left",
468 erp->retries);
469 dasd_3990_erp_block_queue(erp, HZ);
470 } else {
471
472 /* no state change pending - retry */
473 DEV_MESSAGE (KERN_INFO, device,
474 "redriving request immediately, "
475 "%d retries left",
476 erp->retries);
477 erp->status = DASD_CQR_QUEUED;
478 }
479 }
480
481 return erp;
482
483 } /* end dasd_3990_erp_action_4 */
484
485 /*
486 *****************************************************************************
487 * 24 byte sense ERP functions (only)
488 *****************************************************************************
489 */
490
491 /*
492 * DASD_3990_ERP_ACTION_5
493 *
494 * DESCRIPTION
495 * Setup ERP to do the ERP action 5 (see Reference manual).
496 * NOTE: Further handling is done in xxx_further_erp after the retries.
497 *
498 * PARAMETER
499 * erp pointer to the current ERP
500 *
501 * RETURN VALUES
502 * erp pointer to the ERP
503 *
504 */
505 static struct dasd_ccw_req *
506 dasd_3990_erp_action_5(struct dasd_ccw_req * erp)
507 {
508
509 /* first of all retry */
510 erp->retries = 10;
511 erp->function = dasd_3990_erp_action_5;
512
513 return erp;
514
515 } /* end dasd_3990_erp_action_5 */
516
517 /*
518 * DASD_3990_HANDLE_ENV_DATA
519 *
520 * DESCRIPTION
521 * Handles 24 byte 'Environmental data present'.
522 * Does a analysis of the sense data (message Format)
523 * and prints the error messages.
524 *
525 * PARAMETER
526 * sense current sense data
527 *
528 * RETURN VALUES
529 * void
530 */
531 static void
532 dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense)
533 {
534
535 struct dasd_device *device = erp->device;
536 char msg_format = (sense[7] & 0xF0);
537 char msg_no = (sense[7] & 0x0F);
538
539 switch (msg_format) {
540 case 0x00: /* Format 0 - Program or System Checks */
541
542 if (sense[1] & 0x10) { /* check message to operator bit */
543
544 switch (msg_no) {
545 case 0x00: /* No Message */
546 break;
547 case 0x01:
548 DEV_MESSAGE(KERN_WARNING, device, "%s",
549 "FORMAT 0 - Invalid Command");
550 break;
551 case 0x02:
552 DEV_MESSAGE(KERN_WARNING, device, "%s",
553 "FORMAT 0 - Invalid Command "
554 "Sequence");
555 break;
556 case 0x03:
557 DEV_MESSAGE(KERN_WARNING, device, "%s",
558 "FORMAT 0 - CCW Count less than "
559 "required");
560 break;
561 case 0x04:
562 DEV_MESSAGE(KERN_WARNING, device, "%s",
563 "FORMAT 0 - Invalid Parameter");
564 break;
565 case 0x05:
566 DEV_MESSAGE(KERN_WARNING, device, "%s",
567 "FORMAT 0 - Diagnostic of Sepecial"
568 " Command Violates File Mask");
569 break;
570 case 0x07:
571 DEV_MESSAGE(KERN_WARNING, device, "%s",
572 "FORMAT 0 - Channel Returned with "
573 "Incorrect retry CCW");
574 break;
575 case 0x08:
576 DEV_MESSAGE(KERN_WARNING, device, "%s",
577 "FORMAT 0 - Reset Notification");
578 break;
579 case 0x09:
580 DEV_MESSAGE(KERN_WARNING, device, "%s",
581 "FORMAT 0 - Storage Path Restart");
582 break;
583 case 0x0A:
584 DEV_MESSAGE(KERN_WARNING, device,
585 "FORMAT 0 - Channel requested "
586 "... %02x", sense[8]);
587 break;
588 case 0x0B:
589 DEV_MESSAGE(KERN_WARNING, device, "%s",
590 "FORMAT 0 - Invalid Defective/"
591 "Alternate Track Pointer");
592 break;
593 case 0x0C:
594 DEV_MESSAGE(KERN_WARNING, device, "%s",
595 "FORMAT 0 - DPS Installation "
596 "Check");
597 break;
598 case 0x0E:
599 DEV_MESSAGE(KERN_WARNING, device, "%s",
600 "FORMAT 0 - Command Invalid on "
601 "Secondary Address");
602 break;
603 case 0x0F:
604 DEV_MESSAGE(KERN_WARNING, device,
605 "FORMAT 0 - Status Not As "
606 "Required: reason %02x", sense[8]);
607 break;
608 default:
609 DEV_MESSAGE(KERN_WARNING, device, "%s",
610 "FORMAT 0 - Reseved");
611 }
612 } else {
613 switch (msg_no) {
614 case 0x00: /* No Message */
615 break;
616 case 0x01:
617 DEV_MESSAGE(KERN_WARNING, device, "%s",
618 "FORMAT 0 - Device Error Source");
619 break;
620 case 0x02:
621 DEV_MESSAGE(KERN_WARNING, device, "%s",
622 "FORMAT 0 - Reserved");
623 break;
624 case 0x03:
625 DEV_MESSAGE(KERN_WARNING, device,
626 "FORMAT 0 - Device Fenced - "
627 "device = %02x", sense[4]);
628 break;
629 case 0x04:
630 DEV_MESSAGE(KERN_WARNING, device, "%s",
631 "FORMAT 0 - Data Pinned for "
632 "Device");
633 break;
634 default:
635 DEV_MESSAGE(KERN_WARNING, device, "%s",
636 "FORMAT 0 - Reserved");
637 }
638 }
639 break;
640
641 case 0x10: /* Format 1 - Device Equipment Checks */
642 switch (msg_no) {
643 case 0x00: /* No Message */
644 break;
645 case 0x01:
646 DEV_MESSAGE(KERN_WARNING, device, "%s",
647 "FORMAT 1 - Device Status 1 not as "
648 "expected");
649 break;
650 case 0x03:
651 DEV_MESSAGE(KERN_WARNING, device, "%s",
652 "FORMAT 1 - Index missing");
653 break;
654 case 0x04:
655 DEV_MESSAGE(KERN_WARNING, device, "%s",
656 "FORMAT 1 - Interruption cannot be reset");
657 break;
658 case 0x05:
659 DEV_MESSAGE(KERN_WARNING, device, "%s",
660 "FORMAT 1 - Device did not respond to "
661 "selection");
662 break;
663 case 0x06:
664 DEV_MESSAGE(KERN_WARNING, device, "%s",
665 "FORMAT 1 - Device check-2 error or Set "
666 "Sector is not complete");
667 break;
668 case 0x07:
669 DEV_MESSAGE(KERN_WARNING, device, "%s",
670 "FORMAT 1 - Head address does not "
671 "compare");
672 break;
673 case 0x08:
674 DEV_MESSAGE(KERN_WARNING, device, "%s",
675 "FORMAT 1 - Device status 1 not valid");
676 break;
677 case 0x09:
678 DEV_MESSAGE(KERN_WARNING, device, "%s",
679 "FORMAT 1 - Device not ready");
680 break;
681 case 0x0A:
682 DEV_MESSAGE(KERN_WARNING, device, "%s",
683 "FORMAT 1 - Track physical address did "
684 "not compare");
685 break;
686 case 0x0B:
687 DEV_MESSAGE(KERN_WARNING, device, "%s",
688 "FORMAT 1 - Missing device address bit");
689 break;
690 case 0x0C:
691 DEV_MESSAGE(KERN_WARNING, device, "%s",
692 "FORMAT 1 - Drive motor switch is off");
693 break;
694 case 0x0D:
695 DEV_MESSAGE(KERN_WARNING, device, "%s",
696 "FORMAT 1 - Seek incomplete");
697 break;
698 case 0x0E:
699 DEV_MESSAGE(KERN_WARNING, device, "%s",
700 "FORMAT 1 - Cylinder address did not "
701 "compare");
702 break;
703 case 0x0F:
704 DEV_MESSAGE(KERN_WARNING, device, "%s",
705 "FORMAT 1 - Offset active cannot be "
706 "reset");
707 break;
708 default:
709 DEV_MESSAGE(KERN_WARNING, device, "%s",
710 "FORMAT 1 - Reserved");
711 }
712 break;
713
714 case 0x20: /* Format 2 - 3990 Equipment Checks */
715 switch (msg_no) {
716 case 0x08:
717 DEV_MESSAGE(KERN_WARNING, device, "%s",
718 "FORMAT 2 - 3990 check-2 error");
719 break;
720 case 0x0E:
721 DEV_MESSAGE(KERN_WARNING, device, "%s",
722 "FORMAT 2 - Support facility errors");
723 break;
724 case 0x0F:
725 DEV_MESSAGE(KERN_WARNING, device,
726 "FORMAT 2 - Microcode detected error %02x",
727 sense[8]);
728 break;
729 default:
730 DEV_MESSAGE(KERN_WARNING, device, "%s",
731 "FORMAT 2 - Reserved");
732 }
733 break;
734
735 case 0x30: /* Format 3 - 3990 Control Checks */
736 switch (msg_no) {
737 case 0x0F:
738 DEV_MESSAGE(KERN_WARNING, device, "%s",
739 "FORMAT 3 - Allegiance terminated");
740 break;
741 default:
742 DEV_MESSAGE(KERN_WARNING, device, "%s",
743 "FORMAT 3 - Reserved");
744 }
745 break;
746
747 case 0x40: /* Format 4 - Data Checks */
748 switch (msg_no) {
749 case 0x00:
750 DEV_MESSAGE(KERN_WARNING, device, "%s",
751 "FORMAT 4 - Home address area error");
752 break;
753 case 0x01:
754 DEV_MESSAGE(KERN_WARNING, device, "%s",
755 "FORMAT 4 - Count area error");
756 break;
757 case 0x02:
758 DEV_MESSAGE(KERN_WARNING, device, "%s",
759 "FORMAT 4 - Key area error");
760 break;
761 case 0x03:
762 DEV_MESSAGE(KERN_WARNING, device, "%s",
763 "FORMAT 4 - Data area error");
764 break;
765 case 0x04:
766 DEV_MESSAGE(KERN_WARNING, device, "%s",
767 "FORMAT 4 - No sync byte in home address "
768 "area");
769 break;
770 case 0x05:
771 DEV_MESSAGE(KERN_WARNING, device, "%s",
772 "FORMAT 4 - No sync byte in count address "
773 "area");
774 break;
775 case 0x06:
776 DEV_MESSAGE(KERN_WARNING, device, "%s",
777 "FORMAT 4 - No sync byte in key area");
778 break;
779 case 0x07:
780 DEV_MESSAGE(KERN_WARNING, device, "%s",
781 "FORMAT 4 - No sync byte in data area");
782 break;
783 case 0x08:
784 DEV_MESSAGE(KERN_WARNING, device, "%s",
785 "FORMAT 4 - Home address area error; "
786 "offset active");
787 break;
788 case 0x09:
789 DEV_MESSAGE(KERN_WARNING, device, "%s",
790 "FORMAT 4 - Count area error; offset "
791 "active");
792 break;
793 case 0x0A:
794 DEV_MESSAGE(KERN_WARNING, device, "%s",
795 "FORMAT 4 - Key area error; offset "
796 "active");
797 break;
798 case 0x0B:
799 DEV_MESSAGE(KERN_WARNING, device, "%s",
800 "FORMAT 4 - Data area error; "
801 "offset active");
802 break;
803 case 0x0C:
804 DEV_MESSAGE(KERN_WARNING, device, "%s",
805 "FORMAT 4 - No sync byte in home "
806 "address area; offset active");
807 break;
808 case 0x0D:
809 DEV_MESSAGE(KERN_WARNING, device, "%s",
810 "FORMAT 4 - No syn byte in count "
811 "address area; offset active");
812 break;
813 case 0x0E:
814 DEV_MESSAGE(KERN_WARNING, device, "%s",
815 "FORMAT 4 - No sync byte in key area; "
816 "offset active");
817 break;
818 case 0x0F:
819 DEV_MESSAGE(KERN_WARNING, device, "%s",
820 "FORMAT 4 - No syn byte in data area; "
821 "offset active");
822 break;
823 default:
824 DEV_MESSAGE(KERN_WARNING, device, "%s",
825 "FORMAT 4 - Reserved");
826 }
827 break;
828
829 case 0x50: /* Format 5 - Data Check with displacement information */
830 switch (msg_no) {
831 case 0x00:
832 DEV_MESSAGE(KERN_WARNING, device, "%s",
833 "FORMAT 5 - Data Check in the "
834 "home address area");
835 break;
836 case 0x01:
837 DEV_MESSAGE(KERN_WARNING, device, "%s",
838 "FORMAT 5 - Data Check in the count area");
839 break;
840 case 0x02:
841 DEV_MESSAGE(KERN_WARNING, device, "%s",
842 "FORMAT 5 - Data Check in the key area");
843 break;
844 case 0x03:
845 DEV_MESSAGE(KERN_WARNING, device, "%s",
846 "FORMAT 5 - Data Check in the data area");
847 break;
848 case 0x08:
849 DEV_MESSAGE(KERN_WARNING, device, "%s",
850 "FORMAT 5 - Data Check in the "
851 "home address area; offset active");
852 break;
853 case 0x09:
854 DEV_MESSAGE(KERN_WARNING, device, "%s",
855 "FORMAT 5 - Data Check in the count area; "
856 "offset active");
857 break;
858 case 0x0A:
859 DEV_MESSAGE(KERN_WARNING, device, "%s",
860 "FORMAT 5 - Data Check in the key area; "
861 "offset active");
862 break;
863 case 0x0B:
864 DEV_MESSAGE(KERN_WARNING, device, "%s",
865 "FORMAT 5 - Data Check in the data area; "
866 "offset active");
867 break;
868 default:
869 DEV_MESSAGE(KERN_WARNING, device, "%s",
870 "FORMAT 5 - Reserved");
871 }
872 break;
873
874 case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */
875 switch (msg_no) {
876 case 0x00:
877 DEV_MESSAGE(KERN_WARNING, device, "%s",
878 "FORMAT 6 - Overrun on channel A");
879 break;
880 case 0x01:
881 DEV_MESSAGE(KERN_WARNING, device, "%s",
882 "FORMAT 6 - Overrun on channel B");
883 break;
884 case 0x02:
885 DEV_MESSAGE(KERN_WARNING, device, "%s",
886 "FORMAT 6 - Overrun on channel C");
887 break;
888 case 0x03:
889 DEV_MESSAGE(KERN_WARNING, device, "%s",
890 "FORMAT 6 - Overrun on channel D");
891 break;
892 case 0x04:
893 DEV_MESSAGE(KERN_WARNING, device, "%s",
894 "FORMAT 6 - Overrun on channel E");
895 break;
896 case 0x05:
897 DEV_MESSAGE(KERN_WARNING, device, "%s",
898 "FORMAT 6 - Overrun on channel F");
899 break;
900 case 0x06:
901 DEV_MESSAGE(KERN_WARNING, device, "%s",
902 "FORMAT 6 - Overrun on channel G");
903 break;
904 case 0x07:
905 DEV_MESSAGE(KERN_WARNING, device, "%s",
906 "FORMAT 6 - Overrun on channel H");
907 break;
908 default:
909 DEV_MESSAGE(KERN_WARNING, device, "%s",
910 "FORMAT 6 - Reserved");
911 }
912 break;
913
914 case 0x70: /* Format 7 - Device Connection Control Checks */
915 switch (msg_no) {
916 case 0x00:
917 DEV_MESSAGE(KERN_WARNING, device, "%s",
918 "FORMAT 7 - RCC initiated by a connection "
919 "check alert");
920 break;
921 case 0x01:
922 DEV_MESSAGE(KERN_WARNING, device, "%s",
923 "FORMAT 7 - RCC 1 sequence not "
924 "successful");
925 break;
926 case 0x02:
927 DEV_MESSAGE(KERN_WARNING, device, "%s",
928 "FORMAT 7 - RCC 1 and RCC 2 sequences not "
929 "successful");
930 break;
931 case 0x03:
932 DEV_MESSAGE(KERN_WARNING, device, "%s",
933 "FORMAT 7 - Invalid tag-in during "
934 "selection sequence");
935 break;
936 case 0x04:
937 DEV_MESSAGE(KERN_WARNING, device, "%s",
938 "FORMAT 7 - extra RCC required");
939 break;
940 case 0x05:
941 DEV_MESSAGE(KERN_WARNING, device, "%s",
942 "FORMAT 7 - Invalid DCC selection "
943 "response or timeout");
944 break;
945 case 0x06:
946 DEV_MESSAGE(KERN_WARNING, device, "%s",
947 "FORMAT 7 - Missing end operation; device "
948 "transfer complete");
949 break;
950 case 0x07:
951 DEV_MESSAGE(KERN_WARNING, device, "%s",
952 "FORMAT 7 - Missing end operation; device "
953 "transfer incomplete");
954 break;
955 case 0x08:
956 DEV_MESSAGE(KERN_WARNING, device, "%s",
957 "FORMAT 7 - Invalid tag-in for an "
958 "immediate command sequence");
959 break;
960 case 0x09:
961 DEV_MESSAGE(KERN_WARNING, device, "%s",
962 "FORMAT 7 - Invalid tag-in for an "
963 "extended command sequence");
964 break;
965 case 0x0A:
966 DEV_MESSAGE(KERN_WARNING, device, "%s",
967 "FORMAT 7 - 3990 microcode time out when "
968 "stopping selection");
969 break;
970 case 0x0B:
971 DEV_MESSAGE(KERN_WARNING, device, "%s",
972 "FORMAT 7 - No response to selection "
973 "after a poll interruption");
974 break;
975 case 0x0C:
976 DEV_MESSAGE(KERN_WARNING, device, "%s",
977 "FORMAT 7 - Permanent path error (DASD "
978 "controller not available)");
979 break;
980 case 0x0D:
981 DEV_MESSAGE(KERN_WARNING, device, "%s",
982 "FORMAT 7 - DASD controller not available"
983 " on disconnected command chain");
984 break;
985 default:
986 DEV_MESSAGE(KERN_WARNING, device, "%s",
987 "FORMAT 7 - Reserved");
988 }
989 break;
990
991 case 0x80: /* Format 8 - Additional Device Equipment Checks */
992 switch (msg_no) {
993 case 0x00: /* No Message */
994 case 0x01:
995 DEV_MESSAGE(KERN_WARNING, device, "%s",
996 "FORMAT 8 - Error correction code "
997 "hardware fault");
998 break;
999 case 0x03:
1000 DEV_MESSAGE(KERN_WARNING, device, "%s",
1001 "FORMAT 8 - Unexpected end operation "
1002 "response code");
1003 break;
1004 case 0x04:
1005 DEV_MESSAGE(KERN_WARNING, device, "%s",
1006 "FORMAT 8 - End operation with transfer "
1007 "count not zero");
1008 break;
1009 case 0x05:
1010 DEV_MESSAGE(KERN_WARNING, device, "%s",
1011 "FORMAT 8 - End operation with transfer "
1012 "count zero");
1013 break;
1014 case 0x06:
1015 DEV_MESSAGE(KERN_WARNING, device, "%s",
1016 "FORMAT 8 - DPS checks after a system "
1017 "reset or selective reset");
1018 break;
1019 case 0x07:
1020 DEV_MESSAGE(KERN_WARNING, device, "%s",
1021 "FORMAT 8 - DPS cannot be filled");
1022 break;
1023 case 0x08:
1024 DEV_MESSAGE(KERN_WARNING, device, "%s",
1025 "FORMAT 8 - Short busy time-out during "
1026 "device selection");
1027 break;
1028 case 0x09:
1029 DEV_MESSAGE(KERN_WARNING, device, "%s",
1030 "FORMAT 8 - DASD controller failed to "
1031 "set or reset the long busy latch");
1032 break;
1033 case 0x0A:
1034 DEV_MESSAGE(KERN_WARNING, device, "%s",
1035 "FORMAT 8 - No interruption from device "
1036 "during a command chain");
1037 break;
1038 default:
1039 DEV_MESSAGE(KERN_WARNING, device, "%s",
1040 "FORMAT 8 - Reserved");
1041 }
1042 break;
1043
1044 case 0x90: /* Format 9 - Device Read, Write, and Seek Checks */
1045 switch (msg_no) {
1046 case 0x00:
1047 break; /* No Message */
1048 case 0x06:
1049 DEV_MESSAGE(KERN_WARNING, device, "%s",
1050 "FORMAT 9 - Device check-2 error");
1051 break;
1052 case 0x07:
1053 DEV_MESSAGE(KERN_WARNING, device, "%s",
1054 "FORMAT 9 - Head address did not compare");
1055 break;
1056 case 0x0A:
1057 DEV_MESSAGE(KERN_WARNING, device, "%s",
1058 "FORMAT 9 - Track physical address did "
1059 "not compare while oriented");
1060 break;
1061 case 0x0E:
1062 DEV_MESSAGE(KERN_WARNING, device, "%s",
1063 "FORMAT 9 - Cylinder address did not "
1064 "compare");
1065 break;
1066 default:
1067 DEV_MESSAGE(KERN_WARNING, device, "%s",
1068 "FORMAT 9 - Reserved");
1069 }
1070 break;
1071
1072 case 0xF0: /* Format F - Cache Storage Checks */
1073 switch (msg_no) {
1074 case 0x00:
1075 DEV_MESSAGE(KERN_WARNING, device, "%s",
1076 "FORMAT F - Operation Terminated");
1077 break;
1078 case 0x01:
1079 DEV_MESSAGE(KERN_WARNING, device, "%s",
1080 "FORMAT F - Subsystem Processing Error");
1081 break;
1082 case 0x02:
1083 DEV_MESSAGE(KERN_WARNING, device, "%s",
1084 "FORMAT F - Cache or nonvolatile storage "
1085 "equipment failure");
1086 break;
1087 case 0x04:
1088 DEV_MESSAGE(KERN_WARNING, device, "%s",
1089 "FORMAT F - Caching terminated");
1090 break;
1091 case 0x06:
1092 DEV_MESSAGE(KERN_WARNING, device, "%s",
1093 "FORMAT F - Cache fast write access not "
1094 "authorized");
1095 break;
1096 case 0x07:
1097 DEV_MESSAGE(KERN_WARNING, device, "%s",
1098 "FORMAT F - Track format incorrect");
1099 break;
1100 case 0x09:
1101 DEV_MESSAGE(KERN_WARNING, device, "%s",
1102 "FORMAT F - Caching reinitiated");
1103 break;
1104 case 0x0A:
1105 DEV_MESSAGE(KERN_WARNING, device, "%s",
1106 "FORMAT F - Nonvolatile storage "
1107 "terminated");
1108 break;
1109 case 0x0B:
1110 DEV_MESSAGE(KERN_WARNING, device, "%s",
1111 "FORMAT F - Volume is suspended duplex");
1112 break;
1113 case 0x0C:
1114 DEV_MESSAGE(KERN_WARNING, device, "%s",
1115 "FORMAT F - Subsystem status connot be "
1116 "determined");
1117 break;
1118 case 0x0D:
1119 DEV_MESSAGE(KERN_WARNING, device, "%s",
1120 "FORMAT F - Caching status reset to "
1121 "default");
1122 break;
1123 case 0x0E:
1124 DEV_MESSAGE(KERN_WARNING, device, "%s",
1125 "FORMAT F - DASD Fast Write inhibited");
1126 break;
1127 default:
1128 DEV_MESSAGE(KERN_WARNING, device, "%s",
1129 "FORMAT D - Reserved");
1130 }
1131 break;
1132
1133 default: /* unknown message format - should not happen */
1134 DEV_MESSAGE (KERN_WARNING, device,
1135 "unknown message format %02x",
1136 msg_format);
1137 break;
1138 } /* end switch message format */
1139
1140 } /* end dasd_3990_handle_env_data */
1141
1142 /*
1143 * DASD_3990_ERP_COM_REJ
1144 *
1145 * DESCRIPTION
1146 * Handles 24 byte 'Command Reject' error.
1147 *
1148 * PARAMETER
1149 * erp current erp_head
1150 * sense current sense data
1151 *
1152 * RETURN VALUES
1153 * erp 'new' erp_head - pointer to new ERP
1154 */
1155 static struct dasd_ccw_req *
1156 dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense)
1157 {
1158
1159 struct dasd_device *device = erp->device;
1160
1161 erp->function = dasd_3990_erp_com_rej;
1162
1163 /* env data present (ACTION 10 - retry should work) */
1164 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1165
1166 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1167 "Command Reject - environmental data present");
1168
1169 dasd_3990_handle_env_data(erp, sense);
1170
1171 erp->retries = 5;
1172
1173 } else {
1174 /* fatal error - set status to FAILED */
1175 DEV_MESSAGE(KERN_ERR, device, "%s",
1176 "Command Reject - Fatal error");
1177
1178 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1179 }
1180
1181 return erp;
1182
1183 } /* end dasd_3990_erp_com_rej */
1184
1185 /*
1186 * DASD_3990_ERP_BUS_OUT
1187 *
1188 * DESCRIPTION
1189 * Handles 24 byte 'Bus Out Parity Check' error.
1190 *
1191 * PARAMETER
1192 * erp current erp_head
1193 * RETURN VALUES
1194 * erp new erp_head - pointer to new ERP
1195 */
1196 static struct dasd_ccw_req *
1197 dasd_3990_erp_bus_out(struct dasd_ccw_req * erp)
1198 {
1199
1200 struct dasd_device *device = erp->device;
1201
1202 /* first time set initial retry counter and erp_function */
1203 /* and retry once without blocking queue */
1204 /* (this enables easier enqueing of the cqr) */
1205 if (erp->function != dasd_3990_erp_bus_out) {
1206 erp->retries = 256;
1207 erp->function = dasd_3990_erp_bus_out;
1208
1209 } else {
1210
1211 /* issue a message and wait for 'device ready' interrupt */
1212 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1213 "bus out parity error or BOPC requested by "
1214 "channel");
1215
1216 dasd_3990_erp_block_queue(erp, 60*HZ);
1217
1218 }
1219
1220 return erp;
1221
1222 } /* end dasd_3990_erp_bus_out */
1223
1224 /*
1225 * DASD_3990_ERP_EQUIP_CHECK
1226 *
1227 * DESCRIPTION
1228 * Handles 24 byte 'Equipment Check' error.
1229 *
1230 * PARAMETER
1231 * erp current erp_head
1232 * RETURN VALUES
1233 * erp new erp_head - pointer to new ERP
1234 */
1235 static struct dasd_ccw_req *
1236 dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense)
1237 {
1238
1239 struct dasd_device *device = erp->device;
1240
1241 erp->function = dasd_3990_erp_equip_check;
1242
1243 if (sense[1] & SNS1_WRITE_INHIBITED) {
1244
1245 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1246 "Write inhibited path encountered");
1247
1248 /* vary path offline */
1249 DEV_MESSAGE(KERN_ERR, device, "%s",
1250 "Path should be varied off-line. "
1251 "This is not implemented yet \n - please report "
1252 "to linux390@de.ibm.com");
1253
1254 erp = dasd_3990_erp_action_1(erp);
1255
1256 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1257
1258 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1259 "Equipment Check - " "environmental data present");
1260
1261 dasd_3990_handle_env_data(erp, sense);
1262
1263 erp = dasd_3990_erp_action_4(erp, sense);
1264
1265 } else if (sense[1] & SNS1_PERM_ERR) {
1266
1267 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1268 "Equipment Check - retry exhausted or "
1269 "undesirable");
1270
1271 erp = dasd_3990_erp_action_1(erp);
1272
1273 } else {
1274 /* all other equipment checks - Action 5 */
1275 /* rest is done when retries == 0 */
1276 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1277 "Equipment check or processing error");
1278
1279 erp = dasd_3990_erp_action_5(erp);
1280 }
1281
1282 return erp;
1283
1284 } /* end dasd_3990_erp_equip_check */
1285
1286 /*
1287 * DASD_3990_ERP_DATA_CHECK
1288 *
1289 * DESCRIPTION
1290 * Handles 24 byte 'Data Check' error.
1291 *
1292 * PARAMETER
1293 * erp current erp_head
1294 * RETURN VALUES
1295 * erp new erp_head - pointer to new ERP
1296 */
1297 static struct dasd_ccw_req *
1298 dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense)
1299 {
1300
1301 struct dasd_device *device = erp->device;
1302
1303 erp->function = dasd_3990_erp_data_check;
1304
1305 if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */
1306
1307 /* issue message that the data has been corrected */
1308 DEV_MESSAGE(KERN_EMERG, device, "%s",
1309 "Data recovered during retry with PCI "
1310 "fetch mode active");
1311
1312 /* not possible to handle this situation in Linux */
1313 panic("No way to inform application about the possibly "
1314 "incorrect data");
1315
1316 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1317
1318 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1319 "Uncorrectable data check recovered secondary "
1320 "addr of duplex pair");
1321
1322 erp = dasd_3990_erp_action_4(erp, sense);
1323
1324 } else if (sense[1] & SNS1_PERM_ERR) {
1325
1326 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1327 "Uncorrectable data check with internal "
1328 "retry exhausted");
1329
1330 erp = dasd_3990_erp_action_1(erp);
1331
1332 } else {
1333 /* all other data checks */
1334 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1335 "Uncorrectable data check with retry count "
1336 "exhausted...");
1337
1338 erp = dasd_3990_erp_action_5(erp);
1339 }
1340
1341 return erp;
1342
1343 } /* end dasd_3990_erp_data_check */
1344
1345 /*
1346 * DASD_3990_ERP_OVERRUN
1347 *
1348 * DESCRIPTION
1349 * Handles 24 byte 'Overrun' error.
1350 *
1351 * PARAMETER
1352 * erp current erp_head
1353 * RETURN VALUES
1354 * erp new erp_head - pointer to new ERP
1355 */
1356 static struct dasd_ccw_req *
1357 dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense)
1358 {
1359
1360 struct dasd_device *device = erp->device;
1361
1362 erp->function = dasd_3990_erp_overrun;
1363
1364 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1365 "Overrun - service overrun or overrun"
1366 " error requested by channel");
1367
1368 erp = dasd_3990_erp_action_5(erp);
1369
1370 return erp;
1371
1372 } /* end dasd_3990_erp_overrun */
1373
1374 /*
1375 * DASD_3990_ERP_INV_FORMAT
1376 *
1377 * DESCRIPTION
1378 * Handles 24 byte 'Invalid Track Format' error.
1379 *
1380 * PARAMETER
1381 * erp current erp_head
1382 * RETURN VALUES
1383 * erp new erp_head - pointer to new ERP
1384 */
1385 static struct dasd_ccw_req *
1386 dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense)
1387 {
1388
1389 struct dasd_device *device = erp->device;
1390
1391 erp->function = dasd_3990_erp_inv_format;
1392
1393 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1394
1395 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1396 "Track format error when destaging or "
1397 "staging data");
1398
1399 dasd_3990_handle_env_data(erp, sense);
1400
1401 erp = dasd_3990_erp_action_4(erp, sense);
1402
1403 } else {
1404 DEV_MESSAGE(KERN_ERR, device, "%s",
1405 "Invalid Track Format - Fatal error should have "
1406 "been handled within the interrupt handler");
1407
1408 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1409 }
1410
1411 return erp;
1412
1413 } /* end dasd_3990_erp_inv_format */
1414
1415 /*
1416 * DASD_3990_ERP_EOC
1417 *
1418 * DESCRIPTION
1419 * Handles 24 byte 'End-of-Cylinder' error.
1420 *
1421 * PARAMETER
1422 * erp already added default erp
1423 * RETURN VALUES
1424 * erp pointer to original (failed) cqr.
1425 */
1426 static struct dasd_ccw_req *
1427 dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense)
1428 {
1429
1430 struct dasd_device *device = default_erp->device;
1431
1432 DEV_MESSAGE(KERN_ERR, device, "%s",
1433 "End-of-Cylinder - must never happen");
1434
1435 /* implement action 7 - BUG */
1436 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1437
1438 } /* end dasd_3990_erp_EOC */
1439
1440 /*
1441 * DASD_3990_ERP_ENV_DATA
1442 *
1443 * DESCRIPTION
1444 * Handles 24 byte 'Environmental-Data Present' error.
1445 *
1446 * PARAMETER
1447 * erp current erp_head
1448 * RETURN VALUES
1449 * erp new erp_head - pointer to new ERP
1450 */
1451 static struct dasd_ccw_req *
1452 dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense)
1453 {
1454
1455 struct dasd_device *device = erp->device;
1456
1457 erp->function = dasd_3990_erp_env_data;
1458
1459 DEV_MESSAGE(KERN_DEBUG, device, "%s", "Environmental data present");
1460
1461 dasd_3990_handle_env_data(erp, sense);
1462
1463 /* don't retry on disabled interface */
1464 if (sense[7] != 0x0F) {
1465
1466 erp = dasd_3990_erp_action_4(erp, sense);
1467 } else {
1468
1469 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_IN_IO);
1470 }
1471
1472 return erp;
1473
1474 } /* end dasd_3990_erp_env_data */
1475
1476 /*
1477 * DASD_3990_ERP_NO_REC
1478 *
1479 * DESCRIPTION
1480 * Handles 24 byte 'No Record Found' error.
1481 *
1482 * PARAMETER
1483 * erp already added default ERP
1484 *
1485 * RETURN VALUES
1486 * erp new erp_head - pointer to new ERP
1487 */
1488 static struct dasd_ccw_req *
1489 dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense)
1490 {
1491
1492 struct dasd_device *device = default_erp->device;
1493
1494 DEV_MESSAGE(KERN_ERR, device, "%s",
1495 "No Record Found - Fatal error should "
1496 "have been handled within the interrupt handler");
1497
1498 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1499
1500 } /* end dasd_3990_erp_no_rec */
1501
1502 /*
1503 * DASD_3990_ERP_FILE_PROT
1504 *
1505 * DESCRIPTION
1506 * Handles 24 byte 'File Protected' error.
1507 * Note: Seek related recovery is not implemented because
1508 * wee don't use the seek command yet.
1509 *
1510 * PARAMETER
1511 * erp current erp_head
1512 * RETURN VALUES
1513 * erp new erp_head - pointer to new ERP
1514 */
1515 static struct dasd_ccw_req *
1516 dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
1517 {
1518
1519 struct dasd_device *device = erp->device;
1520
1521 DEV_MESSAGE(KERN_ERR, device, "%s", "File Protected");
1522
1523 return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1524
1525 } /* end dasd_3990_erp_file_prot */
1526
1527 /*
1528 * DASD_3990_ERP_INSPECT_24
1529 *
1530 * DESCRIPTION
1531 * Does a detailed inspection of the 24 byte sense data
1532 * and sets up a related error recovery action.
1533 *
1534 * PARAMETER
1535 * sense sense data of the actual error
1536 * erp pointer to the currently created default ERP
1537 *
1538 * RETURN VALUES
1539 * erp pointer to the (addtitional) ERP
1540 */
1541 static struct dasd_ccw_req *
1542 dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense)
1543 {
1544
1545 struct dasd_ccw_req *erp_filled = NULL;
1546
1547 /* Check sense for .... */
1548 /* 'Command Reject' */
1549 if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) {
1550 erp_filled = dasd_3990_erp_com_rej(erp, sense);
1551 }
1552 /* 'Intervention Required' */
1553 if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) {
1554 erp_filled = dasd_3990_erp_int_req(erp);
1555 }
1556 /* 'Bus Out Parity Check' */
1557 if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) {
1558 erp_filled = dasd_3990_erp_bus_out(erp);
1559 }
1560 /* 'Equipment Check' */
1561 if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) {
1562 erp_filled = dasd_3990_erp_equip_check(erp, sense);
1563 }
1564 /* 'Data Check' */
1565 if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) {
1566 erp_filled = dasd_3990_erp_data_check(erp, sense);
1567 }
1568 /* 'Overrun' */
1569 if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) {
1570 erp_filled = dasd_3990_erp_overrun(erp, sense);
1571 }
1572 /* 'Invalid Track Format' */
1573 if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) {
1574 erp_filled = dasd_3990_erp_inv_format(erp, sense);
1575 }
1576 /* 'End-of-Cylinder' */
1577 if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) {
1578 erp_filled = dasd_3990_erp_EOC(erp, sense);
1579 }
1580 /* 'Environmental Data' */
1581 if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) {
1582 erp_filled = dasd_3990_erp_env_data(erp, sense);
1583 }
1584 /* 'No Record Found' */
1585 if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) {
1586 erp_filled = dasd_3990_erp_no_rec(erp, sense);
1587 }
1588 /* 'File Protected' */
1589 if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) {
1590 erp_filled = dasd_3990_erp_file_prot(erp);
1591 }
1592 /* other (unknown) error - do default ERP */
1593 if (erp_filled == NULL) {
1594
1595 erp_filled = erp;
1596 }
1597
1598 return erp_filled;
1599
1600 } /* END dasd_3990_erp_inspect_24 */
1601
1602 /*
1603 *****************************************************************************
1604 * 32 byte sense ERP functions (only)
1605 *****************************************************************************
1606 */
1607
1608 /*
1609 * DASD_3990_ERPACTION_10_32
1610 *
1611 * DESCRIPTION
1612 * Handles 32 byte 'Action 10' of Single Program Action Codes.
1613 * Just retry and if retry doesn't work, return with error.
1614 *
1615 * PARAMETER
1616 * erp current erp_head
1617 * sense current sense data
1618 * RETURN VALUES
1619 * erp modified erp_head
1620 */
1621 static struct dasd_ccw_req *
1622 dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense)
1623 {
1624
1625 struct dasd_device *device = erp->device;
1626
1627 erp->retries = 256;
1628 erp->function = dasd_3990_erp_action_10_32;
1629
1630 DEV_MESSAGE(KERN_DEBUG, device, "%s", "Perform logging requested");
1631
1632 return erp;
1633
1634 } /* end dasd_3990_erp_action_10_32 */
1635
1636 /*
1637 * DASD_3990_ERP_ACTION_1B_32
1638 *
1639 * DESCRIPTION
1640 * Handles 32 byte 'Action 1B' of Single Program Action Codes.
1641 * A write operation could not be finished because of an unexpected
1642 * condition.
1643 * The already created 'default erp' is used to get the link to
1644 * the erp chain, but it can not be used for this recovery
1645 * action because it contains no DE/LO data space.
1646 *
1647 * PARAMETER
1648 * default_erp already added default erp.
1649 * sense current sense data
1650 *
1651 * RETURN VALUES
1652 * erp new erp or
1653 * default_erp in case of imprecise ending or error
1654 */
1655 static struct dasd_ccw_req *
1656 dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1657 {
1658
1659 struct dasd_device *device = default_erp->device;
1660 __u32 cpa = 0;
1661 struct dasd_ccw_req *cqr;
1662 struct dasd_ccw_req *erp;
1663 struct DE_eckd_data *DE_data;
1664 char *LO_data; /* LO_eckd_data_t */
1665 struct ccw1 *ccw;
1666
1667 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1668 "Write not finished because of unexpected condition");
1669
1670 default_erp->function = dasd_3990_erp_action_1B_32;
1671
1672 /* determine the original cqr */
1673 cqr = default_erp;
1674
1675 while (cqr->refers != NULL) {
1676 cqr = cqr->refers;
1677 }
1678
1679 /* for imprecise ending just do default erp */
1680 if (sense[1] & 0x01) {
1681
1682 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1683 "Imprecise ending is set - just retry");
1684
1685 return default_erp;
1686 }
1687
1688 /* determine the address of the CCW to be restarted */
1689 /* Imprecise ending is not set -> addr from IRB-SCSW */
1690 cpa = default_erp->refers->irb.scsw.cpa;
1691
1692 if (cpa == 0) {
1693
1694 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1695 "Unable to determine address of the CCW "
1696 "to be restarted");
1697
1698 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1699 }
1700
1701 /* Build new ERP request including DE/LO */
1702 erp = dasd_alloc_erp_request((char *) &cqr->magic,
1703 2 + 1,/* DE/LO + TIC */
1704 sizeof (struct DE_eckd_data) +
1705 sizeof (struct LO_eckd_data), device);
1706
1707 if (IS_ERR(erp)) {
1708 DEV_MESSAGE(KERN_ERR, device, "%s", "Unable to allocate ERP");
1709 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1710 }
1711
1712 /* use original DE */
1713 DE_data = erp->data;
1714 memcpy(DE_data, cqr->data, sizeof (struct DE_eckd_data));
1715
1716 /* create LO */
1717 LO_data = erp->data + sizeof (struct DE_eckd_data);
1718
1719 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1720
1721 DEV_MESSAGE(KERN_ERR, device, "%s",
1722 "BUG - this should not happen");
1723
1724 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1725 }
1726
1727 if ((sense[7] & 0x3F) == 0x01) {
1728 /* operation code is WRITE DATA -> data area orientation */
1729 LO_data[0] = 0x81;
1730
1731 } else if ((sense[7] & 0x3F) == 0x03) {
1732 /* operation code is FORMAT WRITE -> index orientation */
1733 LO_data[0] = 0xC3;
1734
1735 } else {
1736 LO_data[0] = sense[7]; /* operation */
1737 }
1738
1739 LO_data[1] = sense[8]; /* auxiliary */
1740 LO_data[2] = sense[9];
1741 LO_data[3] = sense[3]; /* count */
1742 LO_data[4] = sense[29]; /* seek_addr.cyl */
1743 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1744 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1745
1746 memcpy(&(LO_data[8]), &(sense[11]), 8);
1747
1748 /* create DE ccw */
1749 ccw = erp->cpaddr;
1750 memset(ccw, 0, sizeof (struct ccw1));
1751 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
1752 ccw->flags = CCW_FLAG_CC;
1753 ccw->count = 16;
1754 ccw->cda = (__u32)(addr_t) DE_data;
1755
1756 /* create LO ccw */
1757 ccw++;
1758 memset(ccw, 0, sizeof (struct ccw1));
1759 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
1760 ccw->flags = CCW_FLAG_CC;
1761 ccw->count = 16;
1762 ccw->cda = (__u32)(addr_t) LO_data;
1763
1764 /* TIC to the failed ccw */
1765 ccw++;
1766 ccw->cmd_code = CCW_CMD_TIC;
1767 ccw->cda = cpa;
1768
1769 /* fill erp related fields */
1770 erp->function = dasd_3990_erp_action_1B_32;
1771 erp->refers = default_erp->refers;
1772 erp->device = device;
1773 erp->magic = default_erp->magic;
1774 erp->expires = 0;
1775 erp->retries = 256;
1776 erp->buildclk = get_clock();
1777 erp->status = DASD_CQR_FILLED;
1778
1779 /* remove the default erp */
1780 dasd_free_erp_request(default_erp, device);
1781
1782 return erp;
1783
1784 } /* end dasd_3990_erp_action_1B_32 */
1785
1786 /*
1787 * DASD_3990_UPDATE_1B
1788 *
1789 * DESCRIPTION
1790 * Handles the update to the 32 byte 'Action 1B' of Single Program
1791 * Action Codes in case the first action was not successful.
1792 * The already created 'previous_erp' is the currently not successful
1793 * ERP.
1794 *
1795 * PARAMETER
1796 * previous_erp already created previous erp.
1797 * sense current sense data
1798 * RETURN VALUES
1799 * erp modified erp
1800 */
1801 static struct dasd_ccw_req *
1802 dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
1803 {
1804
1805 struct dasd_device *device = previous_erp->device;
1806 __u32 cpa = 0;
1807 struct dasd_ccw_req *cqr;
1808 struct dasd_ccw_req *erp;
1809 char *LO_data; /* struct LO_eckd_data */
1810 struct ccw1 *ccw;
1811
1812 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1813 "Write not finished because of unexpected condition"
1814 " - follow on");
1815
1816 /* determine the original cqr */
1817 cqr = previous_erp;
1818
1819 while (cqr->refers != NULL) {
1820 cqr = cqr->refers;
1821 }
1822
1823 /* for imprecise ending just do default erp */
1824 if (sense[1] & 0x01) {
1825
1826 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1827 "Imprecise ending is set - just retry");
1828
1829 previous_erp->status = DASD_CQR_QUEUED;
1830
1831 return previous_erp;
1832 }
1833
1834 /* determine the address of the CCW to be restarted */
1835 /* Imprecise ending is not set -> addr from IRB-SCSW */
1836 cpa = previous_erp->irb.scsw.cpa;
1837
1838 if (cpa == 0) {
1839
1840 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1841 "Unable to determine address of the CCW "
1842 "to be restarted");
1843
1844 previous_erp->status = DASD_CQR_FAILED;
1845
1846 return previous_erp;
1847 }
1848
1849 erp = previous_erp;
1850
1851 /* update the LO with the new returned sense data */
1852 LO_data = erp->data + sizeof (struct DE_eckd_data);
1853
1854 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1855
1856 DEV_MESSAGE(KERN_ERR, device, "%s",
1857 "BUG - this should not happen");
1858
1859 previous_erp->status = DASD_CQR_FAILED;
1860
1861 return previous_erp;
1862 }
1863
1864 if ((sense[7] & 0x3F) == 0x01) {
1865 /* operation code is WRITE DATA -> data area orientation */
1866 LO_data[0] = 0x81;
1867
1868 } else if ((sense[7] & 0x3F) == 0x03) {
1869 /* operation code is FORMAT WRITE -> index orientation */
1870 LO_data[0] = 0xC3;
1871
1872 } else {
1873 LO_data[0] = sense[7]; /* operation */
1874 }
1875
1876 LO_data[1] = sense[8]; /* auxiliary */
1877 LO_data[2] = sense[9];
1878 LO_data[3] = sense[3]; /* count */
1879 LO_data[4] = sense[29]; /* seek_addr.cyl */
1880 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1881 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1882
1883 memcpy(&(LO_data[8]), &(sense[11]), 8);
1884
1885 /* TIC to the failed ccw */
1886 ccw = erp->cpaddr; /* addr of DE ccw */
1887 ccw++; /* addr of LE ccw */
1888 ccw++; /* addr of TIC ccw */
1889 ccw->cda = cpa;
1890
1891 erp->status = DASD_CQR_QUEUED;
1892
1893 return erp;
1894
1895 } /* end dasd_3990_update_1B */
1896
1897 /*
1898 * DASD_3990_ERP_COMPOUND_RETRY
1899 *
1900 * DESCRIPTION
1901 * Handles the compound ERP action retry code.
1902 * NOTE: At least one retry is done even if zero is specified
1903 * by the sense data. This makes enqueueing of the request
1904 * easier.
1905 *
1906 * PARAMETER
1907 * sense sense data of the actual error
1908 * erp pointer to the currently created ERP
1909 *
1910 * RETURN VALUES
1911 * erp modified ERP pointer
1912 *
1913 */
1914 static void
1915 dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense)
1916 {
1917
1918 switch (sense[25] & 0x03) {
1919 case 0x00: /* no not retry */
1920 erp->retries = 1;
1921 break;
1922
1923 case 0x01: /* retry 2 times */
1924 erp->retries = 2;
1925 break;
1926
1927 case 0x02: /* retry 10 times */
1928 erp->retries = 10;
1929 break;
1930
1931 case 0x03: /* retry 256 times */
1932 erp->retries = 256;
1933 break;
1934
1935 default:
1936 BUG();
1937 }
1938
1939 erp->function = dasd_3990_erp_compound_retry;
1940
1941 } /* end dasd_3990_erp_compound_retry */
1942
1943 /*
1944 * DASD_3990_ERP_COMPOUND_PATH
1945 *
1946 * DESCRIPTION
1947 * Handles the compound ERP action for retry on alternate
1948 * channel path.
1949 *
1950 * PARAMETER
1951 * sense sense data of the actual error
1952 * erp pointer to the currently created ERP
1953 *
1954 * RETURN VALUES
1955 * erp modified ERP pointer
1956 *
1957 */
1958 static void
1959 dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
1960 {
1961
1962 if (sense[25] & DASD_SENSE_BIT_3) {
1963 dasd_3990_erp_alternate_path(erp);
1964
1965 if (erp->status == DASD_CQR_FAILED) {
1966 /* reset the lpm and the status to be able to
1967 * try further actions. */
1968
1969 erp->lpm = 0;
1970
1971 erp->status = DASD_CQR_ERROR;
1972
1973 }
1974 }
1975
1976 erp->function = dasd_3990_erp_compound_path;
1977
1978 } /* end dasd_3990_erp_compound_path */
1979
1980 /*
1981 * DASD_3990_ERP_COMPOUND_CODE
1982 *
1983 * DESCRIPTION
1984 * Handles the compound ERP action for retry code.
1985 *
1986 * PARAMETER
1987 * sense sense data of the actual error
1988 * erp pointer to the currently created ERP
1989 *
1990 * RETURN VALUES
1991 * erp NEW ERP pointer
1992 *
1993 */
1994 static struct dasd_ccw_req *
1995 dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense)
1996 {
1997
1998 if (sense[25] & DASD_SENSE_BIT_2) {
1999
2000 switch (sense[28]) {
2001 case 0x17:
2002 /* issue a Diagnostic Control command with an
2003 * Inhibit Write subcommand and controler modifier */
2004 erp = dasd_3990_erp_DCTL(erp, 0x20);
2005 break;
2006
2007 case 0x25:
2008 /* wait for 5 seconds and retry again */
2009 erp->retries = 1;
2010
2011 dasd_3990_erp_block_queue (erp, 5*HZ);
2012 break;
2013
2014 default:
2015 /* should not happen - continue */
2016 break;
2017 }
2018 }
2019
2020 erp->function = dasd_3990_erp_compound_code;
2021
2022 return erp;
2023
2024 } /* end dasd_3990_erp_compound_code */
2025
2026 /*
2027 * DASD_3990_ERP_COMPOUND_CONFIG
2028 *
2029 * DESCRIPTION
2030 * Handles the compound ERP action for configruation
2031 * dependent error.
2032 * Note: duplex handling is not implemented (yet).
2033 *
2034 * PARAMETER
2035 * sense sense data of the actual error
2036 * erp pointer to the currently created ERP
2037 *
2038 * RETURN VALUES
2039 * erp modified ERP pointer
2040 *
2041 */
2042 static void
2043 dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
2044 {
2045
2046 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) {
2047
2048 /* set to suspended duplex state then restart */
2049 struct dasd_device *device = erp->device;
2050
2051 DEV_MESSAGE(KERN_ERR, device, "%s",
2052 "Set device to suspended duplex state should be "
2053 "done!\n"
2054 "This is not implemented yet (for compound ERP)"
2055 " - please report to linux390@de.ibm.com");
2056
2057 }
2058
2059 erp->function = dasd_3990_erp_compound_config;
2060
2061 } /* end dasd_3990_erp_compound_config */
2062
2063 /*
2064 * DASD_3990_ERP_COMPOUND
2065 *
2066 * DESCRIPTION
2067 * Does the further compound program action if
2068 * compound retry was not successful.
2069 *
2070 * PARAMETER
2071 * sense sense data of the actual error
2072 * erp pointer to the current (failed) ERP
2073 *
2074 * RETURN VALUES
2075 * erp (additional) ERP pointer
2076 *
2077 */
2078 static struct dasd_ccw_req *
2079 dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense)
2080 {
2081
2082 if ((erp->function == dasd_3990_erp_compound_retry) &&
2083 (erp->status == DASD_CQR_ERROR)) {
2084
2085 dasd_3990_erp_compound_path(erp, sense);
2086 }
2087
2088 if ((erp->function == dasd_3990_erp_compound_path) &&
2089 (erp->status == DASD_CQR_ERROR)) {
2090
2091 erp = dasd_3990_erp_compound_code(erp, sense);
2092 }
2093
2094 if ((erp->function == dasd_3990_erp_compound_code) &&
2095 (erp->status == DASD_CQR_ERROR)) {
2096
2097 dasd_3990_erp_compound_config(erp, sense);
2098 }
2099
2100 /* if no compound action ERP specified, the request failed */
2101 if (erp->status == DASD_CQR_ERROR) {
2102
2103 erp->status = DASD_CQR_FAILED;
2104 }
2105
2106 return erp;
2107
2108 } /* end dasd_3990_erp_compound */
2109
2110 /*
2111 * DASD_3990_ERP_INSPECT_32
2112 *
2113 * DESCRIPTION
2114 * Does a detailed inspection of the 32 byte sense data
2115 * and sets up a related error recovery action.
2116 *
2117 * PARAMETER
2118 * sense sense data of the actual error
2119 * erp pointer to the currently created default ERP
2120 *
2121 * RETURN VALUES
2122 * erp_filled pointer to the ERP
2123 *
2124 */
2125 static struct dasd_ccw_req *
2126 dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
2127 {
2128
2129 struct dasd_device *device = erp->device;
2130
2131 erp->function = dasd_3990_erp_inspect_32;
2132
2133 if (sense[25] & DASD_SENSE_BIT_0) {
2134
2135 /* compound program action codes (byte25 bit 0 == '1') */
2136 dasd_3990_erp_compound_retry(erp, sense);
2137
2138 } else {
2139
2140 /* single program action codes (byte25 bit 0 == '0') */
2141 switch (sense[25]) {
2142
2143 case 0x00: /* success - use default ERP for retries */
2144 DEV_MESSAGE(KERN_DEBUG, device, "%s",
2145 "ERP called for successful request"
2146 " - just retry");
2147 break;
2148
2149 case 0x01: /* fatal error */
2150 DEV_MESSAGE(KERN_ERR, device, "%s",
2151 "Fatal error should have been "
2152 "handled within the interrupt handler");
2153
2154 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2155 break;
2156
2157 case 0x02: /* intervention required */
2158 case 0x03: /* intervention required during dual copy */
2159 erp = dasd_3990_erp_int_req(erp);
2160 break;
2161
2162 case 0x0F: /* length mismatch during update write command */
2163 DEV_MESSAGE(KERN_ERR, device, "%s",
2164 "update write command error - should not "
2165 "happen;\n"
2166 "Please send this message together with "
2167 "the above sense data to linux390@de."
2168 "ibm.com");
2169
2170 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2171 break;
2172
2173 case 0x10: /* logging required for other channel program */
2174 erp = dasd_3990_erp_action_10_32(erp, sense);
2175 break;
2176
2177 case 0x15: /* next track outside defined extend */
2178 DEV_MESSAGE(KERN_ERR, device, "%s",
2179 "next track outside defined extend - "
2180 "should not happen;\n"
2181 "Please send this message together with "
2182 "the above sense data to linux390@de."
2183 "ibm.com");
2184
2185 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2186 break;
2187
2188 case 0x1B: /* unexpected condition during write */
2189
2190 erp = dasd_3990_erp_action_1B_32(erp, sense);
2191 break;
2192
2193 case 0x1C: /* invalid data */
2194 DEV_MESSAGE(KERN_EMERG, device, "%s",
2195 "Data recovered during retry with PCI "
2196 "fetch mode active");
2197
2198 /* not possible to handle this situation in Linux */
2199 panic
2200 ("Invalid data - No way to inform application "
2201 "about the possibly incorrect data");
2202 break;
2203
2204 case 0x1D: /* state-change pending */
2205 DEV_MESSAGE(KERN_DEBUG, device, "%s",
2206 "A State change pending condition exists "
2207 "for the subsystem or device");
2208
2209 erp = dasd_3990_erp_action_4(erp, sense);
2210 break;
2211
2212 case 0x1E: /* busy */
2213 DEV_MESSAGE(KERN_DEBUG, device, "%s",
2214 "Busy condition exists "
2215 "for the subsystem or device");
2216 erp = dasd_3990_erp_action_4(erp, sense);
2217 break;
2218
2219 default: /* all others errors - default erp */
2220 break;
2221 }
2222 }
2223
2224 return erp;
2225
2226 } /* end dasd_3990_erp_inspect_32 */
2227
2228 /*
2229 *****************************************************************************
2230 * main ERP control fuctions (24 and 32 byte sense)
2231 *****************************************************************************
2232 */
2233
2234 /*
2235 * DASD_3990_ERP_INSPECT
2236 *
2237 * DESCRIPTION
2238 * Does a detailed inspection for sense data by calling either
2239 * the 24-byte or the 32-byte inspection routine.
2240 *
2241 * PARAMETER
2242 * erp pointer to the currently created default ERP
2243 * RETURN VALUES
2244 * erp_new contens was possibly modified
2245 */
2246 static struct dasd_ccw_req *
2247 dasd_3990_erp_inspect(struct dasd_ccw_req * erp)
2248 {
2249
2250 struct dasd_ccw_req *erp_new = NULL;
2251 /* sense data are located in the refers record of the */
2252 /* already set up new ERP ! */
2253 char *sense = erp->refers->irb.ecw;
2254
2255 /* distinguish between 24 and 32 byte sense data */
2256 if (sense[27] & DASD_SENSE_BIT_0) {
2257
2258 /* inspect the 24 byte sense data */
2259 erp_new = dasd_3990_erp_inspect_24(erp, sense);
2260
2261 } else {
2262
2263 /* inspect the 32 byte sense data */
2264 erp_new = dasd_3990_erp_inspect_32(erp, sense);
2265
2266 } /* end distinguish between 24 and 32 byte sense data */
2267
2268 return erp_new;
2269 }
2270
2271 /*
2272 * DASD_3990_ERP_ADD_ERP
2273 *
2274 * DESCRIPTION
2275 * This funtion adds an additional request block (ERP) to the head of
2276 * the given cqr (or erp).
2277 * This erp is initialized as an default erp (retry TIC)
2278 *
2279 * PARAMETER
2280 * cqr head of the current ERP-chain (or single cqr if
2281 * first error)
2282 * RETURN VALUES
2283 * erp pointer to new ERP-chain head
2284 */
2285 static struct dasd_ccw_req *
2286 dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr)
2287 {
2288
2289 struct dasd_device *device = cqr->device;
2290 struct ccw1 *ccw;
2291
2292 /* allocate additional request block */
2293 struct dasd_ccw_req *erp;
2294
2295 erp = dasd_alloc_erp_request((char *) &cqr->magic, 2, 0, cqr->device);
2296 if (IS_ERR(erp)) {
2297 if (cqr->retries <= 0) {
2298 DEV_MESSAGE(KERN_ERR, device, "%s",
2299 "Unable to allocate ERP request");
2300 cqr->status = DASD_CQR_FAILED;
2301 cqr->stopclk = get_clock ();
2302 } else {
2303 DEV_MESSAGE (KERN_ERR, device,
2304 "Unable to allocate ERP request "
2305 "(%i retries left)",
2306 cqr->retries);
2307 dasd_set_timer(device, (HZ << 3));
2308 }
2309 return cqr;
2310 }
2311
2312 /* initialize request with default TIC to current ERP/CQR */
2313 ccw = erp->cpaddr;
2314 ccw->cmd_code = CCW_CMD_NOOP;
2315 ccw->flags = CCW_FLAG_CC;
2316 ccw++;
2317 ccw->cmd_code = CCW_CMD_TIC;
2318 ccw->cda = (long)(cqr->cpaddr);
2319 erp->function = dasd_3990_erp_add_erp;
2320 erp->refers = cqr;
2321 erp->device = cqr->device;
2322 erp->magic = cqr->magic;
2323 erp->expires = 0;
2324 erp->retries = 256;
2325 erp->buildclk = get_clock();
2326
2327 erp->status = DASD_CQR_FILLED;
2328
2329 return erp;
2330 }
2331
2332 /*
2333 * DASD_3990_ERP_ADDITIONAL_ERP
2334 *
2335 * DESCRIPTION
2336 * An additional ERP is needed to handle the current error.
2337 * Add ERP to the head of the ERP-chain containing the ERP processing
2338 * determined based on the sense data.
2339 *
2340 * PARAMETER
2341 * cqr head of the current ERP-chain (or single cqr if
2342 * first error)
2343 *
2344 * RETURN VALUES
2345 * erp pointer to new ERP-chain head
2346 */
2347 static struct dasd_ccw_req *
2348 dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr)
2349 {
2350
2351 struct dasd_ccw_req *erp = NULL;
2352
2353 /* add erp and initialize with default TIC */
2354 erp = dasd_3990_erp_add_erp(cqr);
2355
2356 /* inspect sense, determine specific ERP if possible */
2357 if (erp != cqr) {
2358
2359 erp = dasd_3990_erp_inspect(erp);
2360 }
2361
2362 return erp;
2363
2364 } /* end dasd_3990_erp_additional_erp */
2365
2366 /*
2367 * DASD_3990_ERP_ERROR_MATCH
2368 *
2369 * DESCRIPTION
2370 * Check if the device status of the given cqr is the same.
2371 * This means that the failed CCW and the relevant sense data
2372 * must match.
2373 * I don't distinguish between 24 and 32 byte sense because in case of
2374 * 24 byte sense byte 25 and 27 is set as well.
2375 *
2376 * PARAMETER
2377 * cqr1 first cqr, which will be compared with the
2378 * cqr2 second cqr.
2379 *
2380 * RETURN VALUES
2381 * match 'boolean' for match found
2382 * returns 1 if match found, otherwise 0.
2383 */
2384 static int
2385 dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, struct dasd_ccw_req *cqr2)
2386 {
2387
2388 /* check failed CCW */
2389 if (cqr1->irb.scsw.cpa != cqr2->irb.scsw.cpa) {
2390 // return 0; /* CCW doesn't match */
2391 }
2392
2393 /* check sense data; byte 0-2,25,27 */
2394 if (!((memcmp (cqr1->irb.ecw, cqr2->irb.ecw, 3) == 0) &&
2395 (cqr1->irb.ecw[27] == cqr2->irb.ecw[27]) &&
2396 (cqr1->irb.ecw[25] == cqr2->irb.ecw[25]))) {
2397
2398 return 0; /* sense doesn't match */
2399 }
2400
2401 return 1; /* match */
2402
2403 } /* end dasd_3990_erp_error_match */
2404
2405 /*
2406 * DASD_3990_ERP_IN_ERP
2407 *
2408 * DESCRIPTION
2409 * check if the current error already happened before.
2410 * quick exit if current cqr is not an ERP (cqr->refers=NULL)
2411 *
2412 * PARAMETER
2413 * cqr failed cqr (either original cqr or already an erp)
2414 *
2415 * RETURN VALUES
2416 * erp erp-pointer to the already defined error
2417 * recovery procedure OR
2418 * NULL if a 'new' error occurred.
2419 */
2420 static struct dasd_ccw_req *
2421 dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr)
2422 {
2423
2424 struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */
2425 *erp_match = NULL; /* save erp chain head */
2426 int match = 0; /* 'boolean' for matching error found */
2427
2428 if (cqr->refers == NULL) { /* return if not in erp */
2429 return NULL;
2430 }
2431
2432 /* check the erp/cqr chain for current error */
2433 do {
2434 match = dasd_3990_erp_error_match(erp_head, cqr->refers);
2435 erp_match = cqr; /* save possible matching erp */
2436 cqr = cqr->refers; /* check next erp/cqr in queue */
2437
2438 } while ((cqr->refers != NULL) && (!match));
2439
2440 if (!match) {
2441 return NULL; /* no match was found */
2442 }
2443
2444 return erp_match; /* return address of matching erp */
2445
2446 } /* END dasd_3990_erp_in_erp */
2447
2448 /*
2449 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense)
2450 *
2451 * DESCRIPTION
2452 * No retry is left for the current ERP. Check what has to be done
2453 * with the ERP.
2454 * - do further defined ERP action or
2455 * - wait for interrupt or
2456 * - exit with permanent error
2457 *
2458 * PARAMETER
2459 * erp ERP which is in progress with no retry left
2460 *
2461 * RETURN VALUES
2462 * erp modified/additional ERP
2463 */
2464 static struct dasd_ccw_req *
2465 dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
2466 {
2467
2468 struct dasd_device *device = erp->device;
2469 char *sense = erp->irb.ecw;
2470
2471 /* check for 24 byte sense ERP */
2472 if ((erp->function == dasd_3990_erp_bus_out) ||
2473 (erp->function == dasd_3990_erp_action_1) ||
2474 (erp->function == dasd_3990_erp_action_4)) {
2475
2476 erp = dasd_3990_erp_action_1(erp);
2477
2478 } else if (erp->function == dasd_3990_erp_action_5) {
2479
2480 /* retries have not been successful */
2481 /* prepare erp for retry on different channel path */
2482 erp = dasd_3990_erp_action_1(erp);
2483
2484 if (!(sense[2] & DASD_SENSE_BIT_0)) {
2485
2486 /* issue a Diagnostic Control command with an
2487 * Inhibit Write subcommand */
2488
2489 switch (sense[25]) {
2490 case 0x17:
2491 case 0x57:{ /* controller */
2492 erp = dasd_3990_erp_DCTL(erp, 0x20);
2493 break;
2494 }
2495 case 0x18:
2496 case 0x58:{ /* channel path */
2497 erp = dasd_3990_erp_DCTL(erp, 0x40);
2498 break;
2499 }
2500 case 0x19:
2501 case 0x59:{ /* storage director */
2502 erp = dasd_3990_erp_DCTL(erp, 0x80);
2503 break;
2504 }
2505 default:
2506 DEV_MESSAGE(KERN_DEBUG, device,
2507 "invalid subcommand modifier 0x%x "
2508 "for Diagnostic Control Command",
2509 sense[25]);
2510 }
2511 }
2512
2513 /* check for 32 byte sense ERP */
2514 } else if ((erp->function == dasd_3990_erp_compound_retry) ||
2515 (erp->function == dasd_3990_erp_compound_path) ||
2516 (erp->function == dasd_3990_erp_compound_code) ||
2517 (erp->function == dasd_3990_erp_compound_config)) {
2518
2519 erp = dasd_3990_erp_compound(erp, sense);
2520
2521 } else {
2522 /* No retry left and no additional special handling */
2523 /*necessary */
2524 DEV_MESSAGE(KERN_ERR, device,
2525 "no retries left for erp %p - "
2526 "set status to FAILED", erp);
2527
2528 erp->status = DASD_CQR_FAILED;
2529 }
2530
2531 return erp;
2532
2533 } /* end dasd_3990_erp_further_erp */
2534
2535 /*
2536 * DASD_3990_ERP_HANDLE_MATCH_ERP
2537 *
2538 * DESCRIPTION
2539 * An error occurred again and an ERP has been detected which is already
2540 * used to handle this error (e.g. retries).
2541 * All prior ERP's are asumed to be successful and therefore removed
2542 * from queue.
2543 * If retry counter of matching erp is already 0, it is checked if further
2544 * action is needed (besides retry) or if the ERP has failed.
2545 *
2546 * PARAMETER
2547 * erp_head first ERP in ERP-chain
2548 * erp ERP that handles the actual error.
2549 * (matching erp)
2550 *
2551 * RETURN VALUES
2552 * erp modified/additional ERP
2553 */
2554 static struct dasd_ccw_req *
2555 dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
2556 struct dasd_ccw_req *erp)
2557 {
2558
2559 struct dasd_device *device = erp_head->device;
2560 struct dasd_ccw_req *erp_done = erp_head; /* finished req */
2561 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */
2562
2563 /* loop over successful ERPs and remove them from chanq */
2564 while (erp_done != erp) {
2565
2566 if (erp_done == NULL) /* end of chain reached */
2567 panic(PRINTK_HEADER "Programming error in ERP! The "
2568 "original request was lost\n");
2569
2570 /* remove the request from the device queue */
2571 list_del(&erp_done->list);
2572
2573 erp_free = erp_done;
2574 erp_done = erp_done->refers;
2575
2576 /* free the finished erp request */
2577 dasd_free_erp_request(erp_free, erp_free->device);
2578
2579 } /* end while */
2580
2581 if (erp->retries > 0) {
2582
2583 char *sense = erp->refers->irb.ecw;
2584
2585 /* check for special retries */
2586 if (erp->function == dasd_3990_erp_action_4) {
2587
2588 erp = dasd_3990_erp_action_4(erp, sense);
2589
2590 } else if (erp->function == dasd_3990_erp_action_1B_32) {
2591
2592 erp = dasd_3990_update_1B(erp, sense);
2593
2594 } else if (erp->function == dasd_3990_erp_int_req) {
2595
2596 erp = dasd_3990_erp_int_req(erp);
2597
2598 } else {
2599 /* simple retry */
2600 DEV_MESSAGE(KERN_DEBUG, device,
2601 "%i retries left for erp %p",
2602 erp->retries, erp);
2603
2604 /* handle the request again... */
2605 erp->status = DASD_CQR_QUEUED;
2606 }
2607
2608 } else {
2609 /* no retry left - check for further necessary action */
2610 /* if no further actions, handle rest as permanent error */
2611 erp = dasd_3990_erp_further_erp(erp);
2612 }
2613
2614 return erp;
2615
2616 } /* end dasd_3990_erp_handle_match_erp */
2617
2618 /*
2619 * DASD_3990_ERP_ACTION
2620 *
2621 * DESCRIPTION
2622 * controll routine for 3990 erp actions.
2623 * Has to be called with the queue lock (namely the s390_irq_lock) acquired.
2624 *
2625 * PARAMETER
2626 * cqr failed cqr (either original cqr or already an erp)
2627 *
2628 * RETURN VALUES
2629 * erp erp-pointer to the head of the ERP action chain.
2630 * This means:
2631 * - either a ptr to an additional ERP cqr or
2632 * - the original given cqr (which's status might
2633 * be modified)
2634 */
2635 struct dasd_ccw_req *
2636 dasd_3990_erp_action(struct dasd_ccw_req * cqr)
2637 {
2638
2639 struct dasd_ccw_req *erp = NULL;
2640 struct dasd_device *device = cqr->device;
2641 __u32 cpa = cqr->irb.scsw.cpa;
2642
2643 #ifdef ERP_DEBUG
2644 /* print current erp_chain */
2645 DEV_MESSAGE(KERN_ERR, device, "%s",
2646 "ERP chain at BEGINNING of ERP-ACTION");
2647 {
2648 struct dasd_ccw_req *temp_erp = NULL;
2649
2650 for (temp_erp = cqr;
2651 temp_erp != NULL; temp_erp = temp_erp->refers) {
2652
2653 DEV_MESSAGE(KERN_ERR, device,
2654 " erp %p (%02x) refers to %p",
2655 temp_erp, temp_erp->status,
2656 temp_erp->refers);
2657 }
2658 }
2659 #endif /* ERP_DEBUG */
2660
2661 /* double-check if current erp/cqr was successfull */
2662 if ((cqr->irb.scsw.cstat == 0x00) &&
2663 (cqr->irb.scsw.dstat == (DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2664
2665 DEV_MESSAGE(KERN_DEBUG, device,
2666 "ERP called for successful request %p"
2667 " - NO ERP necessary", cqr);
2668
2669 cqr->status = DASD_CQR_DONE;
2670
2671 return cqr;
2672 }
2673 /* check if sense data are available */
2674 if (!cqr->irb.ecw) {
2675 DEV_MESSAGE(KERN_DEBUG, device,
2676 "ERP called witout sense data avail ..."
2677 "request %p - NO ERP possible", cqr);
2678
2679 cqr->status = DASD_CQR_FAILED;
2680
2681 return cqr;
2682
2683 }
2684
2685 /* check if error happened before */
2686 erp = dasd_3990_erp_in_erp(cqr);
2687
2688 if (erp == NULL) {
2689 /* no matching erp found - set up erp */
2690 erp = dasd_3990_erp_additional_erp(cqr);
2691 } else {
2692 /* matching erp found - set all leading erp's to DONE */
2693 erp = dasd_3990_erp_handle_match_erp(cqr, erp);
2694 }
2695
2696 #ifdef ERP_DEBUG
2697 /* print current erp_chain */
2698 DEV_MESSAGE(KERN_ERR, device, "%s", "ERP chain at END of ERP-ACTION");
2699 {
2700 struct dasd_ccw_req *temp_erp = NULL;
2701 for (temp_erp = erp;
2702 temp_erp != NULL; temp_erp = temp_erp->refers) {
2703
2704 DEV_MESSAGE(KERN_ERR, device,
2705 " erp %p (%02x) refers to %p",
2706 temp_erp, temp_erp->status,
2707 temp_erp->refers);
2708 }
2709 }
2710 #endif /* ERP_DEBUG */
2711
2712 if (erp->status == DASD_CQR_FAILED)
2713 dasd_log_ccw(erp, 1, cpa);
2714
2715 /* enqueue added ERP request */
2716 if (erp->status == DASD_CQR_FILLED) {
2717 erp->status = DASD_CQR_QUEUED;
2718 list_add(&erp->list, &device->ccw_queue);
2719 }
2720
2721 return erp;
2722
2723 } /* end dasd_3990_erp_action */
2724
2725 /*
2726 * Overrides for Emacs so that we follow Linus's tabbing style.
2727 * Emacs will notice this stuff at the end of the file and automatically
2728 * adjust the settings for this buffer only. This must remain at the end
2729 * of the file.
2730 * ---------------------------------------------------------------------------
2731 * Local variables:
2732 * c-indent-level: 4
2733 * c-brace-imaginary-offset: 0
2734 * c-brace-offset: -4
2735 * c-argdecl-indent: 4
2736 * c-label-offset: -4
2737 * c-continued-statement-offset: 4
2738 * c-continued-brace-offset: 0
2739 * indent-tabs-mode: 1
2740 * tab-width: 8
2741 * End:
2742 */
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