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
10 #define KMSG_COMPONENT "dasd-eckd"
12 #include <linux/timer.h>
13 #include <asm/idals.h>
15 #define PRINTK_HEADER "dasd_erp(3990): "
18 #include "dasd_eckd.h"
22 unsigned char subcommand; /* e.g Inhibit Write, Enable Write,... */
23 unsigned char modifier; /* Subcommand modifier */
24 unsigned short res; /* reserved */
25 } __attribute__ ((packed));
28 *****************************************************************************
29 * SECTION ERP HANDLING
30 *****************************************************************************
33 *****************************************************************************
34 * 24 and 32 byte sense ERP functions
35 *****************************************************************************
39 * DASD_3990_ERP_CLEANUP
42 * Removes the already build but not necessary ERP request and sets
43 * the status of the original cqr / erp to the given (final) status
46 * erp request to be blocked
47 * final_status either DASD_CQR_DONE or DASD_CQR_FAILED
52 static struct dasd_ccw_req *
53 dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status)
55 struct dasd_ccw_req *cqr = erp->refers;
57 dasd_free_erp_request(erp, erp->memdev);
58 cqr->status = final_status;
61 } /* end dasd_3990_erp_cleanup */
64 * DASD_3990_ERP_BLOCK_QUEUE
67 * Block the given device request queue to prevent from further
68 * processing until the started timer has expired or an related
69 * interrupt was received.
71 static void dasd_3990_erp_block_queue(struct dasd_ccw_req *erp, int expires)
74 struct dasd_device *device = erp->startdev;
77 DBF_DEV_EVENT(DBF_INFO, device,
78 "blocking request queue for %is", expires/HZ);
80 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
81 dasd_device_set_stop_bits(device, DASD_STOPPED_PENDING);
82 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
83 erp->status = DASD_CQR_FILLED;
85 dasd_block_set_timer(erp->block, expires);
87 dasd_device_set_timer(device, expires);
91 * DASD_3990_ERP_INT_REQ
94 * Handles 'Intervention Required' error.
95 * This means either device offline or not installed.
102 static struct dasd_ccw_req *
103 dasd_3990_erp_int_req(struct dasd_ccw_req * erp)
106 struct dasd_device *device = erp->startdev;
108 /* first time set initial retry counter and erp_function */
109 /* and retry once without blocking queue */
110 /* (this enables easier enqueing of the cqr) */
111 if (erp->function != dasd_3990_erp_int_req) {
114 erp->function = dasd_3990_erp_int_req;
118 /* issue a message and wait for 'device ready' interrupt */
119 dev_err(&device->cdev->dev,
120 "is offline or not installed - "
121 "INTERVENTION REQUIRED!!\n");
123 dasd_3990_erp_block_queue(erp, 60*HZ);
128 } /* end dasd_3990_erp_int_req */
131 * DASD_3990_ERP_ALTERNATE_PATH
134 * Repeat the operation on a different channel path.
135 * If all alternate paths have been tried, the request is posted with a
139 * erp pointer to the current ERP
142 * erp modified pointer to the ERP
145 dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp)
147 struct dasd_device *device = erp->startdev;
151 /* try alternate valid path */
152 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
153 opm = ccw_device_get_path_mask(device->cdev);
154 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
156 erp->lpm = device->path_data.opm &
157 ~(erp->irb.esw.esw0.sublog.lpum);
159 erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum);
161 if ((erp->lpm & opm) != 0x00) {
163 DBF_DEV_EVENT(DBF_WARNING, device,
164 "try alternate lpm=%x (lpum=%x / opm=%x)",
165 erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm);
167 /* reset status to submit the request again... */
168 erp->status = DASD_CQR_FILLED;
171 dev_err(&device->cdev->dev,
172 "The DASD cannot be reached on any path (lpum=%x"
173 "/opm=%x)\n", erp->irb.esw.esw0.sublog.lpum, opm);
175 /* post request with permanent error */
176 erp->status = DASD_CQR_FAILED;
178 } /* end dasd_3990_erp_alternate_path */
184 * Setup cqr to do the Diagnostic Control (DCTL) command with an
185 * Inhibit Write subcommand (0x20) and the given modifier.
188 * erp pointer to the current (failed) ERP
189 * modifier subcommand modifier
192 * dctl_cqr pointer to NEW dctl_cqr
195 static struct dasd_ccw_req *
196 dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier)
199 struct dasd_device *device = erp->startdev;
200 struct DCTL_data *DCTL_data;
202 struct dasd_ccw_req *dctl_cqr;
204 dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1,
205 sizeof(struct DCTL_data),
207 if (IS_ERR(dctl_cqr)) {
208 dev_err(&device->cdev->dev,
209 "Unable to allocate DCTL-CQR\n");
210 erp->status = DASD_CQR_FAILED;
214 DCTL_data = dctl_cqr->data;
216 DCTL_data->subcommand = 0x02; /* Inhibit Write */
217 DCTL_data->modifier = modifier;
219 ccw = dctl_cqr->cpaddr;
220 memset(ccw, 0, sizeof(struct ccw1));
221 ccw->cmd_code = CCW_CMD_DCTL;
223 ccw->cda = (__u32)(addr_t) DCTL_data;
224 dctl_cqr->flags = erp->flags;
225 dctl_cqr->function = dasd_3990_erp_DCTL;
226 dctl_cqr->refers = erp;
227 dctl_cqr->startdev = device;
228 dctl_cqr->memdev = device;
229 dctl_cqr->magic = erp->magic;
230 dctl_cqr->expires = 5 * 60 * HZ;
231 dctl_cqr->retries = 2;
233 dctl_cqr->buildclk = get_clock();
235 dctl_cqr->status = DASD_CQR_FILLED;
239 } /* end dasd_3990_erp_DCTL */
242 * DASD_3990_ERP_ACTION_1
245 * Setup ERP to do the ERP action 1 (see Reference manual).
246 * Repeat the operation on a different channel path.
247 * As deviation from the recommended recovery action, we reset the path mask
248 * after we have tried each path and go through all paths a second time.
249 * This will cover situations where only one path at a time is actually down,
250 * but all paths fail and recover just with the same sequence and timing as
251 * we try to use them (flapping links).
252 * If all alternate paths have been tried twice, the request is posted with
256 * erp pointer to the current ERP
259 * erp pointer to the ERP
262 static struct dasd_ccw_req *dasd_3990_erp_action_1_sec(struct dasd_ccw_req *erp)
264 erp->function = dasd_3990_erp_action_1_sec;
265 dasd_3990_erp_alternate_path(erp);
269 static struct dasd_ccw_req *dasd_3990_erp_action_1(struct dasd_ccw_req *erp)
271 erp->function = dasd_3990_erp_action_1;
272 dasd_3990_erp_alternate_path(erp);
273 if (erp->status == DASD_CQR_FAILED &&
274 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
275 erp->status = DASD_CQR_FILLED;
277 erp->lpm = erp->startdev->path_data.opm;
278 erp->function = dasd_3990_erp_action_1_sec;
281 } /* end dasd_3990_erp_action_1(b) */
284 * DASD_3990_ERP_ACTION_4
287 * Setup ERP to do the ERP action 4 (see Reference manual).
288 * Set the current request to PENDING to block the CQR queue for that device
289 * until the state change interrupt appears.
290 * Use a timer (20 seconds) to retry the cqr if the interrupt is still
294 * sense sense data of the actual error
295 * erp pointer to the current ERP
298 * erp pointer to the ERP
301 static struct dasd_ccw_req *
302 dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense)
305 struct dasd_device *device = erp->startdev;
307 /* first time set initial retry counter and erp_function */
308 /* and retry once without waiting for state change pending */
309 /* interrupt (this enables easier enqueing of the cqr) */
310 if (erp->function != dasd_3990_erp_action_4) {
312 DBF_DEV_EVENT(DBF_INFO, device, "%s",
313 "dasd_3990_erp_action_4: first time retry");
316 erp->function = dasd_3990_erp_action_4;
319 if (sense && (sense[25] == 0x1D)) { /* state change pending */
321 DBF_DEV_EVENT(DBF_INFO, device,
322 "waiting for state change pending "
323 "interrupt, %d retries left",
326 dasd_3990_erp_block_queue(erp, 30*HZ);
328 } else if (sense && (sense[25] == 0x1E)) { /* busy */
329 DBF_DEV_EVENT(DBF_INFO, device,
330 "busy - redriving request later, "
333 dasd_3990_erp_block_queue(erp, HZ);
335 /* no state change pending - retry */
336 DBF_DEV_EVENT(DBF_INFO, device,
337 "redriving request immediately, "
340 erp->status = DASD_CQR_FILLED;
346 } /* end dasd_3990_erp_action_4 */
349 *****************************************************************************
350 * 24 byte sense ERP functions (only)
351 *****************************************************************************
355 * DASD_3990_ERP_ACTION_5
358 * Setup ERP to do the ERP action 5 (see Reference manual).
359 * NOTE: Further handling is done in xxx_further_erp after the retries.
362 * erp pointer to the current ERP
365 * erp pointer to the ERP
368 static struct dasd_ccw_req *
369 dasd_3990_erp_action_5(struct dasd_ccw_req * erp)
372 /* first of all retry */
374 erp->function = dasd_3990_erp_action_5;
378 } /* end dasd_3990_erp_action_5 */
381 * DASD_3990_HANDLE_ENV_DATA
384 * Handles 24 byte 'Environmental data present'.
385 * Does a analysis of the sense data (message Format)
386 * and prints the error messages.
389 * sense current sense data
395 dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense)
398 struct dasd_device *device = erp->startdev;
399 char msg_format = (sense[7] & 0xF0);
400 char msg_no = (sense[7] & 0x0F);
401 char errorstring[ERRORLENGTH];
403 switch (msg_format) {
404 case 0x00: /* Format 0 - Program or System Checks */
406 if (sense[1] & 0x10) { /* check message to operator bit */
409 case 0x00: /* No Message */
412 dev_warn(&device->cdev->dev,
413 "FORMAT 0 - Invalid Command\n");
416 dev_warn(&device->cdev->dev,
417 "FORMAT 0 - Invalid Command "
421 dev_warn(&device->cdev->dev,
422 "FORMAT 0 - CCW Count less than "
426 dev_warn(&device->cdev->dev,
427 "FORMAT 0 - Invalid Parameter\n");
430 dev_warn(&device->cdev->dev,
431 "FORMAT 0 - Diagnostic of Special"
432 " Command Violates File Mask\n");
435 dev_warn(&device->cdev->dev,
436 "FORMAT 0 - Channel Returned with "
437 "Incorrect retry CCW\n");
440 dev_warn(&device->cdev->dev,
441 "FORMAT 0 - Reset Notification\n");
444 dev_warn(&device->cdev->dev,
445 "FORMAT 0 - Storage Path Restart\n");
448 dev_warn(&device->cdev->dev,
449 "FORMAT 0 - Channel requested "
450 "... %02x\n", sense[8]);
453 dev_warn(&device->cdev->dev,
454 "FORMAT 0 - Invalid Defective/"
455 "Alternate Track Pointer\n");
458 dev_warn(&device->cdev->dev,
459 "FORMAT 0 - DPS Installation "
463 dev_warn(&device->cdev->dev,
464 "FORMAT 0 - Command Invalid on "
465 "Secondary Address\n");
468 dev_warn(&device->cdev->dev,
469 "FORMAT 0 - Status Not As "
470 "Required: reason %02x\n",
474 dev_warn(&device->cdev->dev,
475 "FORMAT 0 - Reserved\n");
479 case 0x00: /* No Message */
482 dev_warn(&device->cdev->dev,
483 "FORMAT 0 - Device Error "
487 dev_warn(&device->cdev->dev,
488 "FORMAT 0 - Reserved\n");
491 dev_warn(&device->cdev->dev,
492 "FORMAT 0 - Device Fenced - "
493 "device = %02x\n", sense[4]);
496 dev_warn(&device->cdev->dev,
497 "FORMAT 0 - Data Pinned for "
501 dev_warn(&device->cdev->dev,
502 "FORMAT 0 - Reserved\n");
507 case 0x10: /* Format 1 - Device Equipment Checks */
509 case 0x00: /* No Message */
512 dev_warn(&device->cdev->dev,
513 "FORMAT 1 - Device Status 1 not as "
517 dev_warn(&device->cdev->dev,
518 "FORMAT 1 - Index missing\n");
521 dev_warn(&device->cdev->dev,
522 "FORMAT 1 - Interruption cannot be "
526 dev_warn(&device->cdev->dev,
527 "FORMAT 1 - Device did not respond to "
531 dev_warn(&device->cdev->dev,
532 "FORMAT 1 - Device check-2 error or Set "
533 "Sector is not complete\n");
536 dev_warn(&device->cdev->dev,
537 "FORMAT 1 - Head address does not "
541 dev_warn(&device->cdev->dev,
542 "FORMAT 1 - Device status 1 not valid\n");
545 dev_warn(&device->cdev->dev,
546 "FORMAT 1 - Device not ready\n");
549 dev_warn(&device->cdev->dev,
550 "FORMAT 1 - Track physical address did "
554 dev_warn(&device->cdev->dev,
555 "FORMAT 1 - Missing device address bit\n");
558 dev_warn(&device->cdev->dev,
559 "FORMAT 1 - Drive motor switch is off\n");
562 dev_warn(&device->cdev->dev,
563 "FORMAT 1 - Seek incomplete\n");
566 dev_warn(&device->cdev->dev,
567 "FORMAT 1 - Cylinder address did not "
571 dev_warn(&device->cdev->dev,
572 "FORMAT 1 - Offset active cannot be "
576 dev_warn(&device->cdev->dev,
577 "FORMAT 1 - Reserved\n");
581 case 0x20: /* Format 2 - 3990 Equipment Checks */
584 dev_warn(&device->cdev->dev,
585 "FORMAT 2 - 3990 check-2 error\n");
588 dev_warn(&device->cdev->dev,
589 "FORMAT 2 - Support facility errors\n");
592 dev_warn(&device->cdev->dev,
593 "FORMAT 2 - Microcode detected error "
598 dev_warn(&device->cdev->dev,
599 "FORMAT 2 - Reserved\n");
603 case 0x30: /* Format 3 - 3990 Control Checks */
606 dev_warn(&device->cdev->dev,
607 "FORMAT 3 - Allegiance terminated\n");
610 dev_warn(&device->cdev->dev,
611 "FORMAT 3 - Reserved\n");
615 case 0x40: /* Format 4 - Data Checks */
618 dev_warn(&device->cdev->dev,
619 "FORMAT 4 - Home address area error\n");
622 dev_warn(&device->cdev->dev,
623 "FORMAT 4 - Count area error\n");
626 dev_warn(&device->cdev->dev,
627 "FORMAT 4 - Key area error\n");
630 dev_warn(&device->cdev->dev,
631 "FORMAT 4 - Data area error\n");
634 dev_warn(&device->cdev->dev,
635 "FORMAT 4 - No sync byte in home address "
639 dev_warn(&device->cdev->dev,
640 "FORMAT 4 - No sync byte in count address "
644 dev_warn(&device->cdev->dev,
645 "FORMAT 4 - No sync byte in key area\n");
648 dev_warn(&device->cdev->dev,
649 "FORMAT 4 - No sync byte in data area\n");
652 dev_warn(&device->cdev->dev,
653 "FORMAT 4 - Home address area error; "
657 dev_warn(&device->cdev->dev,
658 "FORMAT 4 - Count area error; offset "
662 dev_warn(&device->cdev->dev,
663 "FORMAT 4 - Key area error; offset "
667 dev_warn(&device->cdev->dev,
668 "FORMAT 4 - Data area error; "
672 dev_warn(&device->cdev->dev,
673 "FORMAT 4 - No sync byte in home "
674 "address area; offset active\n");
677 dev_warn(&device->cdev->dev,
678 "FORMAT 4 - No syn byte in count "
679 "address area; offset active\n");
682 dev_warn(&device->cdev->dev,
683 "FORMAT 4 - No sync byte in key area; "
687 dev_warn(&device->cdev->dev,
688 "FORMAT 4 - No syn byte in data area; "
692 dev_warn(&device->cdev->dev,
693 "FORMAT 4 - Reserved\n");
697 case 0x50: /* Format 5 - Data Check with displacement information */
700 dev_warn(&device->cdev->dev,
701 "FORMAT 5 - Data Check in the "
702 "home address area\n");
705 dev_warn(&device->cdev->dev,
706 "FORMAT 5 - Data Check in the count "
710 dev_warn(&device->cdev->dev,
711 "FORMAT 5 - Data Check in the key area\n");
714 dev_warn(&device->cdev->dev,
715 "FORMAT 5 - Data Check in the data "
719 dev_warn(&device->cdev->dev,
720 "FORMAT 5 - Data Check in the "
721 "home address area; offset active\n");
724 dev_warn(&device->cdev->dev,
725 "FORMAT 5 - Data Check in the count area; "
729 dev_warn(&device->cdev->dev,
730 "FORMAT 5 - Data Check in the key area; "
734 dev_warn(&device->cdev->dev,
735 "FORMAT 5 - Data Check in the data area; "
739 dev_warn(&device->cdev->dev,
740 "FORMAT 5 - Reserved\n");
744 case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */
747 dev_warn(&device->cdev->dev,
748 "FORMAT 6 - Overrun on channel A\n");
751 dev_warn(&device->cdev->dev,
752 "FORMAT 6 - Overrun on channel B\n");
755 dev_warn(&device->cdev->dev,
756 "FORMAT 6 - Overrun on channel C\n");
759 dev_warn(&device->cdev->dev,
760 "FORMAT 6 - Overrun on channel D\n");
763 dev_warn(&device->cdev->dev,
764 "FORMAT 6 - Overrun on channel E\n");
767 dev_warn(&device->cdev->dev,
768 "FORMAT 6 - Overrun on channel F\n");
771 dev_warn(&device->cdev->dev,
772 "FORMAT 6 - Overrun on channel G\n");
775 dev_warn(&device->cdev->dev,
776 "FORMAT 6 - Overrun on channel H\n");
779 dev_warn(&device->cdev->dev,
780 "FORMAT 6 - Reserved\n");
784 case 0x70: /* Format 7 - Device Connection Control Checks */
787 dev_warn(&device->cdev->dev,
788 "FORMAT 7 - RCC initiated by a connection "
792 dev_warn(&device->cdev->dev,
793 "FORMAT 7 - RCC 1 sequence not "
797 dev_warn(&device->cdev->dev,
798 "FORMAT 7 - RCC 1 and RCC 2 sequences not "
802 dev_warn(&device->cdev->dev,
803 "FORMAT 7 - Invalid tag-in during "
804 "selection sequence\n");
807 dev_warn(&device->cdev->dev,
808 "FORMAT 7 - extra RCC required\n");
811 dev_warn(&device->cdev->dev,
812 "FORMAT 7 - Invalid DCC selection "
813 "response or timeout\n");
816 dev_warn(&device->cdev->dev,
817 "FORMAT 7 - Missing end operation; device "
818 "transfer complete\n");
821 dev_warn(&device->cdev->dev,
822 "FORMAT 7 - Missing end operation; device "
823 "transfer incomplete\n");
826 dev_warn(&device->cdev->dev,
827 "FORMAT 7 - Invalid tag-in for an "
828 "immediate command sequence\n");
831 dev_warn(&device->cdev->dev,
832 "FORMAT 7 - Invalid tag-in for an "
833 "extended command sequence\n");
836 dev_warn(&device->cdev->dev,
837 "FORMAT 7 - 3990 microcode time out when "
838 "stopping selection\n");
841 dev_warn(&device->cdev->dev,
842 "FORMAT 7 - No response to selection "
843 "after a poll interruption\n");
846 dev_warn(&device->cdev->dev,
847 "FORMAT 7 - Permanent path error (DASD "
848 "controller not available)\n");
851 dev_warn(&device->cdev->dev,
852 "FORMAT 7 - DASD controller not available"
853 " on disconnected command chain\n");
856 dev_warn(&device->cdev->dev,
857 "FORMAT 7 - Reserved\n");
861 case 0x80: /* Format 8 - Additional Device Equipment Checks */
863 case 0x00: /* No Message */
865 dev_warn(&device->cdev->dev,
866 "FORMAT 8 - Error correction code "
870 dev_warn(&device->cdev->dev,
871 "FORMAT 8 - Unexpected end operation "
875 dev_warn(&device->cdev->dev,
876 "FORMAT 8 - End operation with transfer "
880 dev_warn(&device->cdev->dev,
881 "FORMAT 8 - End operation with transfer "
885 dev_warn(&device->cdev->dev,
886 "FORMAT 8 - DPS checks after a system "
887 "reset or selective reset\n");
890 dev_warn(&device->cdev->dev,
891 "FORMAT 8 - DPS cannot be filled\n");
894 dev_warn(&device->cdev->dev,
895 "FORMAT 8 - Short busy time-out during "
896 "device selection\n");
899 dev_warn(&device->cdev->dev,
900 "FORMAT 8 - DASD controller failed to "
901 "set or reset the long busy latch\n");
904 dev_warn(&device->cdev->dev,
905 "FORMAT 8 - No interruption from device "
906 "during a command chain\n");
909 dev_warn(&device->cdev->dev,
910 "FORMAT 8 - Reserved\n");
914 case 0x90: /* Format 9 - Device Read, Write, and Seek Checks */
917 break; /* No Message */
919 dev_warn(&device->cdev->dev,
920 "FORMAT 9 - Device check-2 error\n");
923 dev_warn(&device->cdev->dev,
924 "FORMAT 9 - Head address did not "
928 dev_warn(&device->cdev->dev,
929 "FORMAT 9 - Track physical address did "
930 "not compare while oriented\n");
933 dev_warn(&device->cdev->dev,
934 "FORMAT 9 - Cylinder address did not "
938 dev_warn(&device->cdev->dev,
939 "FORMAT 9 - Reserved\n");
943 case 0xF0: /* Format F - Cache Storage Checks */
946 dev_warn(&device->cdev->dev,
947 "FORMAT F - Operation Terminated\n");
950 dev_warn(&device->cdev->dev,
951 "FORMAT F - Subsystem Processing Error\n");
954 dev_warn(&device->cdev->dev,
955 "FORMAT F - Cache or nonvolatile storage "
956 "equipment failure\n");
959 dev_warn(&device->cdev->dev,
960 "FORMAT F - Caching terminated\n");
963 dev_warn(&device->cdev->dev,
964 "FORMAT F - Cache fast write access not "
968 dev_warn(&device->cdev->dev,
969 "FORMAT F - Track format incorrect\n");
972 dev_warn(&device->cdev->dev,
973 "FORMAT F - Caching reinitiated\n");
976 dev_warn(&device->cdev->dev,
977 "FORMAT F - Nonvolatile storage "
981 dev_warn(&device->cdev->dev,
982 "FORMAT F - Volume is suspended duplex\n");
983 /* call extended error reporting (EER) */
984 dasd_eer_write(device, erp->refers,
985 DASD_EER_PPRCSUSPEND);
988 dev_warn(&device->cdev->dev,
989 "FORMAT F - Subsystem status cannot be "
993 dev_warn(&device->cdev->dev,
994 "FORMAT F - Caching status reset to "
998 dev_warn(&device->cdev->dev,
999 "FORMAT F - DASD Fast Write inhibited\n");
1002 dev_warn(&device->cdev->dev,
1003 "FORMAT D - Reserved\n");
1007 default: /* unknown message format - should not happen
1008 internal error 03 - unknown message format */
1009 snprintf(errorstring, ERRORLENGTH, "03 %x02", msg_format);
1010 dev_err(&device->cdev->dev,
1011 "An error occurred in the DASD device driver, "
1012 "reason=%s\n", errorstring);
1014 } /* end switch message format */
1016 } /* end dasd_3990_handle_env_data */
1019 * DASD_3990_ERP_COM_REJ
1022 * Handles 24 byte 'Command Reject' error.
1025 * erp current erp_head
1026 * sense current sense data
1029 * erp 'new' erp_head - pointer to new ERP
1031 static struct dasd_ccw_req *
1032 dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense)
1035 struct dasd_device *device = erp->startdev;
1037 erp->function = dasd_3990_erp_com_rej;
1039 /* env data present (ACTION 10 - retry should work) */
1040 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1042 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1043 "Command Reject - environmental data present");
1045 dasd_3990_handle_env_data(erp, sense);
1049 } else if (sense[1] & SNS1_WRITE_INHIBITED) {
1050 dev_err(&device->cdev->dev, "An I/O request was rejected"
1051 " because writing is inhibited\n");
1052 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1054 /* fatal error - set status to FAILED
1055 internal error 09 - Command Reject */
1056 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1057 "device driver, reason=%s\n", "09");
1059 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1064 } /* end dasd_3990_erp_com_rej */
1067 * DASD_3990_ERP_BUS_OUT
1070 * Handles 24 byte 'Bus Out Parity Check' error.
1073 * erp current erp_head
1075 * erp new erp_head - pointer to new ERP
1077 static struct dasd_ccw_req *
1078 dasd_3990_erp_bus_out(struct dasd_ccw_req * erp)
1081 struct dasd_device *device = erp->startdev;
1083 /* first time set initial retry counter and erp_function */
1084 /* and retry once without blocking queue */
1085 /* (this enables easier enqueing of the cqr) */
1086 if (erp->function != dasd_3990_erp_bus_out) {
1088 erp->function = dasd_3990_erp_bus_out;
1092 /* issue a message and wait for 'device ready' interrupt */
1093 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1094 "bus out parity error or BOPC requested by "
1097 dasd_3990_erp_block_queue(erp, 60*HZ);
1103 } /* end dasd_3990_erp_bus_out */
1106 * DASD_3990_ERP_EQUIP_CHECK
1109 * Handles 24 byte 'Equipment Check' error.
1112 * erp current erp_head
1114 * erp new erp_head - pointer to new ERP
1116 static struct dasd_ccw_req *
1117 dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense)
1120 struct dasd_device *device = erp->startdev;
1122 erp->function = dasd_3990_erp_equip_check;
1124 if (sense[1] & SNS1_WRITE_INHIBITED) {
1125 dev_info(&device->cdev->dev,
1126 "Write inhibited path encountered\n");
1128 /* vary path offline
1129 internal error 04 - Path should be varied off-line.*/
1130 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1131 "device driver, reason=%s\n", "04");
1133 erp = dasd_3990_erp_action_1(erp);
1135 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1137 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1138 "Equipment Check - " "environmental data present");
1140 dasd_3990_handle_env_data(erp, sense);
1142 erp = dasd_3990_erp_action_4(erp, sense);
1144 } else if (sense[1] & SNS1_PERM_ERR) {
1146 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1147 "Equipment Check - retry exhausted or "
1150 erp = dasd_3990_erp_action_1(erp);
1153 /* all other equipment checks - Action 5 */
1154 /* rest is done when retries == 0 */
1155 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1156 "Equipment check or processing error");
1158 erp = dasd_3990_erp_action_5(erp);
1162 } /* end dasd_3990_erp_equip_check */
1165 * DASD_3990_ERP_DATA_CHECK
1168 * Handles 24 byte 'Data Check' error.
1171 * erp current erp_head
1173 * erp new erp_head - pointer to new ERP
1175 static struct dasd_ccw_req *
1176 dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense)
1179 struct dasd_device *device = erp->startdev;
1181 erp->function = dasd_3990_erp_data_check;
1183 if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */
1185 /* issue message that the data has been corrected */
1186 dev_emerg(&device->cdev->dev,
1187 "Data recovered during retry with PCI "
1188 "fetch mode active\n");
1190 /* not possible to handle this situation in Linux */
1191 panic("No way to inform application about the possibly "
1194 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1196 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1197 "Uncorrectable data check recovered secondary "
1198 "addr of duplex pair");
1200 erp = dasd_3990_erp_action_4(erp, sense);
1202 } else if (sense[1] & SNS1_PERM_ERR) {
1204 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1205 "Uncorrectable data check with internal "
1208 erp = dasd_3990_erp_action_1(erp);
1211 /* all other data checks */
1212 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1213 "Uncorrectable data check with retry count "
1216 erp = dasd_3990_erp_action_5(erp);
1221 } /* end dasd_3990_erp_data_check */
1224 * DASD_3990_ERP_OVERRUN
1227 * Handles 24 byte 'Overrun' error.
1230 * erp current erp_head
1232 * erp new erp_head - pointer to new ERP
1234 static struct dasd_ccw_req *
1235 dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense)
1238 struct dasd_device *device = erp->startdev;
1240 erp->function = dasd_3990_erp_overrun;
1242 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1243 "Overrun - service overrun or overrun"
1244 " error requested by channel");
1246 erp = dasd_3990_erp_action_5(erp);
1250 } /* end dasd_3990_erp_overrun */
1253 * DASD_3990_ERP_INV_FORMAT
1256 * Handles 24 byte 'Invalid Track Format' error.
1259 * erp current erp_head
1261 * erp new erp_head - pointer to new ERP
1263 static struct dasd_ccw_req *
1264 dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense)
1267 struct dasd_device *device = erp->startdev;
1269 erp->function = dasd_3990_erp_inv_format;
1271 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1273 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1274 "Track format error when destaging or "
1277 dasd_3990_handle_env_data(erp, sense);
1279 erp = dasd_3990_erp_action_4(erp, sense);
1282 /* internal error 06 - The track format is not valid*/
1283 dev_err(&device->cdev->dev,
1284 "An error occurred in the DASD device driver, "
1285 "reason=%s\n", "06");
1287 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1292 } /* end dasd_3990_erp_inv_format */
1298 * Handles 24 byte 'End-of-Cylinder' error.
1301 * erp already added default erp
1303 * erp pointer to original (failed) cqr.
1305 static struct dasd_ccw_req *
1306 dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense)
1309 struct dasd_device *device = default_erp->startdev;
1311 dev_err(&device->cdev->dev,
1312 "The cylinder data for accessing the DASD is inconsistent\n");
1314 /* implement action 7 - BUG */
1315 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1317 } /* end dasd_3990_erp_EOC */
1320 * DASD_3990_ERP_ENV_DATA
1323 * Handles 24 byte 'Environmental-Data Present' error.
1326 * erp current erp_head
1328 * erp new erp_head - pointer to new ERP
1330 static struct dasd_ccw_req *
1331 dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense)
1334 struct dasd_device *device = erp->startdev;
1336 erp->function = dasd_3990_erp_env_data;
1338 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Environmental data present");
1340 dasd_3990_handle_env_data(erp, sense);
1342 /* don't retry on disabled interface */
1343 if (sense[7] != 0x0F) {
1344 erp = dasd_3990_erp_action_4(erp, sense);
1346 erp->status = DASD_CQR_FILLED;
1351 } /* end dasd_3990_erp_env_data */
1354 * DASD_3990_ERP_NO_REC
1357 * Handles 24 byte 'No Record Found' error.
1360 * erp already added default ERP
1363 * erp new erp_head - pointer to new ERP
1365 static struct dasd_ccw_req *
1366 dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense)
1369 struct dasd_device *device = default_erp->startdev;
1371 dev_err(&device->cdev->dev,
1372 "The specified record was not found\n");
1374 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1376 } /* end dasd_3990_erp_no_rec */
1379 * DASD_3990_ERP_FILE_PROT
1382 * Handles 24 byte 'File Protected' error.
1383 * Note: Seek related recovery is not implemented because
1384 * wee don't use the seek command yet.
1387 * erp current erp_head
1389 * erp new erp_head - pointer to new ERP
1391 static struct dasd_ccw_req *
1392 dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
1395 struct dasd_device *device = erp->startdev;
1397 dev_err(&device->cdev->dev, "Accessing the DASD failed because of "
1398 "a hardware error\n");
1400 return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1402 } /* end dasd_3990_erp_file_prot */
1405 * DASD_3990_ERP_INSPECT_ALIAS
1408 * Checks if the original request was started on an alias device.
1409 * If yes, it modifies the original and the erp request so that
1410 * the erp request can be started on a base device.
1413 * erp pointer to the currently created default ERP
1416 * erp pointer to the modified ERP, or NULL
1419 static struct dasd_ccw_req *dasd_3990_erp_inspect_alias(
1420 struct dasd_ccw_req *erp)
1422 struct dasd_ccw_req *cqr = erp->refers;
1426 (cqr->block->base != cqr->startdev)) {
1428 sense = dasd_get_sense(&erp->refers->irb);
1430 * dynamic pav may have changed base alias mapping
1432 if (!test_bit(DASD_FLAG_OFFLINE, &cqr->startdev->flags) && sense
1433 && (sense[0] == 0x10) && (sense[7] == 0x0F)
1434 && (sense[8] == 0x67)) {
1436 * remove device from alias handling to prevent new
1437 * requests from being scheduled on the
1438 * wrong alias device
1440 dasd_alias_remove_device(cqr->startdev);
1442 /* schedule worker to reload device */
1443 dasd_reload_device(cqr->startdev);
1446 if (cqr->startdev->features & DASD_FEATURE_ERPLOG) {
1447 DBF_DEV_EVENT(DBF_ERR, cqr->startdev,
1448 "ERP on alias device for request %p,"
1449 " recover on base device %s", cqr,
1450 dev_name(&cqr->block->base->cdev->dev));
1452 dasd_eckd_reset_ccw_to_base_io(cqr);
1453 erp->startdev = cqr->block->base;
1454 erp->function = dasd_3990_erp_inspect_alias;
1462 * DASD_3990_ERP_INSPECT_24
1465 * Does a detailed inspection of the 24 byte sense data
1466 * and sets up a related error recovery action.
1469 * sense sense data of the actual error
1470 * erp pointer to the currently created default ERP
1473 * erp pointer to the (addtitional) ERP
1475 static struct dasd_ccw_req *
1476 dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense)
1479 struct dasd_ccw_req *erp_filled = NULL;
1481 /* Check sense for .... */
1482 /* 'Command Reject' */
1483 if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) {
1484 erp_filled = dasd_3990_erp_com_rej(erp, sense);
1486 /* 'Intervention Required' */
1487 if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) {
1488 erp_filled = dasd_3990_erp_int_req(erp);
1490 /* 'Bus Out Parity Check' */
1491 if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) {
1492 erp_filled = dasd_3990_erp_bus_out(erp);
1494 /* 'Equipment Check' */
1495 if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) {
1496 erp_filled = dasd_3990_erp_equip_check(erp, sense);
1499 if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) {
1500 erp_filled = dasd_3990_erp_data_check(erp, sense);
1503 if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) {
1504 erp_filled = dasd_3990_erp_overrun(erp, sense);
1506 /* 'Invalid Track Format' */
1507 if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) {
1508 erp_filled = dasd_3990_erp_inv_format(erp, sense);
1510 /* 'End-of-Cylinder' */
1511 if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) {
1512 erp_filled = dasd_3990_erp_EOC(erp, sense);
1514 /* 'Environmental Data' */
1515 if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) {
1516 erp_filled = dasd_3990_erp_env_data(erp, sense);
1518 /* 'No Record Found' */
1519 if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) {
1520 erp_filled = dasd_3990_erp_no_rec(erp, sense);
1522 /* 'File Protected' */
1523 if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) {
1524 erp_filled = dasd_3990_erp_file_prot(erp);
1526 /* other (unknown) error - do default ERP */
1527 if (erp_filled == NULL) {
1534 } /* END dasd_3990_erp_inspect_24 */
1537 *****************************************************************************
1538 * 32 byte sense ERP functions (only)
1539 *****************************************************************************
1543 * DASD_3990_ERPACTION_10_32
1546 * Handles 32 byte 'Action 10' of Single Program Action Codes.
1547 * Just retry and if retry doesn't work, return with error.
1550 * erp current erp_head
1551 * sense current sense data
1553 * erp modified erp_head
1555 static struct dasd_ccw_req *
1556 dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense)
1559 struct dasd_device *device = erp->startdev;
1562 erp->function = dasd_3990_erp_action_10_32;
1564 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Perform logging requested");
1568 } /* end dasd_3990_erp_action_10_32 */
1571 * DASD_3990_ERP_ACTION_1B_32
1574 * Handles 32 byte 'Action 1B' of Single Program Action Codes.
1575 * A write operation could not be finished because of an unexpected
1577 * The already created 'default erp' is used to get the link to
1578 * the erp chain, but it can not be used for this recovery
1579 * action because it contains no DE/LO data space.
1582 * default_erp already added default erp.
1583 * sense current sense data
1587 * default_erp in case of imprecise ending or error
1589 static struct dasd_ccw_req *
1590 dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1593 struct dasd_device *device = default_erp->startdev;
1595 struct dasd_ccw_req *cqr;
1596 struct dasd_ccw_req *erp;
1597 struct DE_eckd_data *DE_data;
1598 struct PFX_eckd_data *PFX_data;
1599 char *LO_data; /* LO_eckd_data_t */
1600 struct ccw1 *ccw, *oldccw;
1602 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1603 "Write not finished because of unexpected condition");
1605 default_erp->function = dasd_3990_erp_action_1B_32;
1607 /* determine the original cqr */
1610 while (cqr->refers != NULL) {
1614 if (scsw_is_tm(&cqr->irb.scsw)) {
1615 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1616 "32 bit sense, action 1B is not defined"
1617 " in transport mode - just retry");
1621 /* for imprecise ending just do default erp */
1622 if (sense[1] & 0x01) {
1623 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1624 "Imprecise ending is set - just retry");
1629 /* determine the address of the CCW to be restarted */
1630 /* Imprecise ending is not set -> addr from IRB-SCSW */
1631 cpa = default_erp->refers->irb.scsw.cmd.cpa;
1634 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1635 "Unable to determine address of the CCW "
1638 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1641 /* Build new ERP request including DE/LO */
1642 erp = dasd_alloc_erp_request((char *) &cqr->magic,
1643 2 + 1,/* DE/LO + TIC */
1644 sizeof(struct DE_eckd_data) +
1645 sizeof(struct LO_eckd_data), device);
1648 /* internal error 01 - Unable to allocate ERP */
1649 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1650 "device driver, reason=%s\n", "01");
1651 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1654 /* use original DE */
1655 DE_data = erp->data;
1656 oldccw = cqr->cpaddr;
1657 if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) {
1658 PFX_data = cqr->data;
1659 memcpy(DE_data, &PFX_data->define_extent,
1660 sizeof(struct DE_eckd_data));
1662 memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data));
1665 LO_data = erp->data + sizeof(struct DE_eckd_data);
1667 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1669 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1672 if ((sense[7] & 0x3F) == 0x01) {
1673 /* operation code is WRITE DATA -> data area orientation */
1676 } else if ((sense[7] & 0x3F) == 0x03) {
1677 /* operation code is FORMAT WRITE -> index orientation */
1681 LO_data[0] = sense[7]; /* operation */
1684 LO_data[1] = sense[8]; /* auxiliary */
1685 LO_data[2] = sense[9];
1686 LO_data[3] = sense[3]; /* count */
1687 LO_data[4] = sense[29]; /* seek_addr.cyl */
1688 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1689 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1691 memcpy(&(LO_data[8]), &(sense[11]), 8);
1695 memset(ccw, 0, sizeof(struct ccw1));
1696 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
1697 ccw->flags = CCW_FLAG_CC;
1699 ccw->cda = (__u32)(addr_t) DE_data;
1703 memset(ccw, 0, sizeof(struct ccw1));
1704 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
1705 ccw->flags = CCW_FLAG_CC;
1707 ccw->cda = (__u32)(addr_t) LO_data;
1709 /* TIC to the failed ccw */
1711 ccw->cmd_code = CCW_CMD_TIC;
1714 /* fill erp related fields */
1715 erp->flags = default_erp->flags;
1716 erp->function = dasd_3990_erp_action_1B_32;
1717 erp->refers = default_erp->refers;
1718 erp->startdev = device;
1719 erp->memdev = device;
1720 erp->magic = default_erp->magic;
1723 erp->buildclk = get_clock();
1724 erp->status = DASD_CQR_FILLED;
1726 /* remove the default erp */
1727 dasd_free_erp_request(default_erp, device);
1731 } /* end dasd_3990_erp_action_1B_32 */
1734 * DASD_3990_UPDATE_1B
1737 * Handles the update to the 32 byte 'Action 1B' of Single Program
1738 * Action Codes in case the first action was not successful.
1739 * The already created 'previous_erp' is the currently not successful
1743 * previous_erp already created previous erp.
1744 * sense current sense data
1748 static struct dasd_ccw_req *
1749 dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
1752 struct dasd_device *device = previous_erp->startdev;
1754 struct dasd_ccw_req *cqr;
1755 struct dasd_ccw_req *erp;
1756 char *LO_data; /* struct LO_eckd_data */
1759 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1760 "Write not finished because of unexpected condition"
1763 /* determine the original cqr */
1766 while (cqr->refers != NULL) {
1770 if (scsw_is_tm(&cqr->irb.scsw)) {
1771 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1772 "32 bit sense, action 1B, update,"
1773 " in transport mode - just retry");
1774 return previous_erp;
1777 /* for imprecise ending just do default erp */
1778 if (sense[1] & 0x01) {
1779 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1780 "Imprecise ending is set - just retry");
1782 previous_erp->status = DASD_CQR_FILLED;
1784 return previous_erp;
1787 /* determine the address of the CCW to be restarted */
1788 /* Imprecise ending is not set -> addr from IRB-SCSW */
1789 cpa = previous_erp->irb.scsw.cmd.cpa;
1792 /* internal error 02 -
1793 Unable to determine address of the CCW to be restarted */
1794 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1795 "device driver, reason=%s\n", "02");
1797 previous_erp->status = DASD_CQR_FAILED;
1799 return previous_erp;
1804 /* update the LO with the new returned sense data */
1805 LO_data = erp->data + sizeof(struct DE_eckd_data);
1807 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1808 /* should not happen */
1809 previous_erp->status = DASD_CQR_FAILED;
1811 return previous_erp;
1814 if ((sense[7] & 0x3F) == 0x01) {
1815 /* operation code is WRITE DATA -> data area orientation */
1818 } else if ((sense[7] & 0x3F) == 0x03) {
1819 /* operation code is FORMAT WRITE -> index orientation */
1823 LO_data[0] = sense[7]; /* operation */
1826 LO_data[1] = sense[8]; /* auxiliary */
1827 LO_data[2] = sense[9];
1828 LO_data[3] = sense[3]; /* count */
1829 LO_data[4] = sense[29]; /* seek_addr.cyl */
1830 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1831 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1833 memcpy(&(LO_data[8]), &(sense[11]), 8);
1835 /* TIC to the failed ccw */
1836 ccw = erp->cpaddr; /* addr of DE ccw */
1837 ccw++; /* addr of LE ccw */
1838 ccw++; /* addr of TIC ccw */
1841 erp->status = DASD_CQR_FILLED;
1845 } /* end dasd_3990_update_1B */
1848 * DASD_3990_ERP_COMPOUND_RETRY
1851 * Handles the compound ERP action retry code.
1852 * NOTE: At least one retry is done even if zero is specified
1853 * by the sense data. This makes enqueueing of the request
1857 * sense sense data of the actual error
1858 * erp pointer to the currently created ERP
1861 * erp modified ERP pointer
1865 dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense)
1868 switch (sense[25] & 0x03) {
1869 case 0x00: /* no not retry */
1873 case 0x01: /* retry 2 times */
1877 case 0x02: /* retry 10 times */
1881 case 0x03: /* retry 256 times */
1889 erp->function = dasd_3990_erp_compound_retry;
1891 } /* end dasd_3990_erp_compound_retry */
1894 * DASD_3990_ERP_COMPOUND_PATH
1897 * Handles the compound ERP action for retry on alternate
1901 * sense sense data of the actual error
1902 * erp pointer to the currently created ERP
1905 * erp modified ERP pointer
1909 dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
1911 if (sense[25] & DASD_SENSE_BIT_3) {
1912 dasd_3990_erp_alternate_path(erp);
1914 if (erp->status == DASD_CQR_FAILED &&
1915 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
1916 /* reset the lpm and the status to be able to
1917 * try further actions. */
1918 erp->lpm = erp->startdev->path_data.opm;
1919 erp->status = DASD_CQR_NEED_ERP;
1923 erp->function = dasd_3990_erp_compound_path;
1925 } /* end dasd_3990_erp_compound_path */
1928 * DASD_3990_ERP_COMPOUND_CODE
1931 * Handles the compound ERP action for retry code.
1934 * sense sense data of the actual error
1935 * erp pointer to the currently created ERP
1938 * erp NEW ERP pointer
1941 static struct dasd_ccw_req *
1942 dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense)
1945 if (sense[25] & DASD_SENSE_BIT_2) {
1947 switch (sense[28]) {
1949 /* issue a Diagnostic Control command with an
1950 * Inhibit Write subcommand and controller modifier */
1951 erp = dasd_3990_erp_DCTL(erp, 0x20);
1955 /* wait for 5 seconds and retry again */
1958 dasd_3990_erp_block_queue (erp, 5*HZ);
1962 /* should not happen - continue */
1967 erp->function = dasd_3990_erp_compound_code;
1971 } /* end dasd_3990_erp_compound_code */
1974 * DASD_3990_ERP_COMPOUND_CONFIG
1977 * Handles the compound ERP action for configruation
1979 * Note: duplex handling is not implemented (yet).
1982 * sense sense data of the actual error
1983 * erp pointer to the currently created ERP
1986 * erp modified ERP pointer
1990 dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
1993 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) {
1995 /* set to suspended duplex state then restart
1996 internal error 05 - Set device to suspended duplex state
1998 struct dasd_device *device = erp->startdev;
1999 dev_err(&device->cdev->dev,
2000 "An error occurred in the DASD device driver, "
2001 "reason=%s\n", "05");
2005 erp->function = dasd_3990_erp_compound_config;
2007 } /* end dasd_3990_erp_compound_config */
2010 * DASD_3990_ERP_COMPOUND
2013 * Does the further compound program action if
2014 * compound retry was not successful.
2017 * sense sense data of the actual error
2018 * erp pointer to the current (failed) ERP
2021 * erp (additional) ERP pointer
2024 static struct dasd_ccw_req *
2025 dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense)
2028 if ((erp->function == dasd_3990_erp_compound_retry) &&
2029 (erp->status == DASD_CQR_NEED_ERP)) {
2031 dasd_3990_erp_compound_path(erp, sense);
2034 if ((erp->function == dasd_3990_erp_compound_path) &&
2035 (erp->status == DASD_CQR_NEED_ERP)) {
2037 erp = dasd_3990_erp_compound_code(erp, sense);
2040 if ((erp->function == dasd_3990_erp_compound_code) &&
2041 (erp->status == DASD_CQR_NEED_ERP)) {
2043 dasd_3990_erp_compound_config(erp, sense);
2046 /* if no compound action ERP specified, the request failed */
2047 if (erp->status == DASD_CQR_NEED_ERP)
2048 erp->status = DASD_CQR_FAILED;
2052 } /* end dasd_3990_erp_compound */
2055 *DASD_3990_ERP_HANDLE_SIM
2058 * inspects the SIM SENSE data and starts an appropriate action
2061 * sense sense data of the actual error
2067 dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense)
2069 /* print message according to log or message to operator mode */
2070 if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) {
2071 /* print SIM SRC from RefCode */
2072 dev_err(&device->cdev->dev, "SIM - SRC: "
2073 "%02x%02x%02x%02x\n", sense[22],
2074 sense[23], sense[11], sense[12]);
2075 } else if (sense[24] & DASD_SIM_LOG) {
2076 /* print SIM SRC Refcode */
2077 dev_warn(&device->cdev->dev, "log SIM - SRC: "
2078 "%02x%02x%02x%02x\n", sense[22],
2079 sense[23], sense[11], sense[12]);
2084 * DASD_3990_ERP_INSPECT_32
2087 * Does a detailed inspection of the 32 byte sense data
2088 * and sets up a related error recovery action.
2091 * sense sense data of the actual error
2092 * erp pointer to the currently created default ERP
2095 * erp_filled pointer to the ERP
2098 static struct dasd_ccw_req *
2099 dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
2102 struct dasd_device *device = erp->startdev;
2104 erp->function = dasd_3990_erp_inspect_32;
2106 /* check for SIM sense data */
2107 if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)
2108 dasd_3990_erp_handle_sim(device, sense);
2110 if (sense[25] & DASD_SENSE_BIT_0) {
2112 /* compound program action codes (byte25 bit 0 == '1') */
2113 dasd_3990_erp_compound_retry(erp, sense);
2117 /* single program action codes (byte25 bit 0 == '0') */
2118 switch (sense[25]) {
2120 case 0x00: /* success - use default ERP for retries */
2121 DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
2122 "ERP called for successful request"
2126 case 0x01: /* fatal error */
2127 dev_err(&device->cdev->dev,
2128 "ERP failed for the DASD\n");
2130 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2133 case 0x02: /* intervention required */
2134 case 0x03: /* intervention required during dual copy */
2135 erp = dasd_3990_erp_int_req(erp);
2138 case 0x0F: /* length mismatch during update write command
2139 internal error 08 - update write command error*/
2140 dev_err(&device->cdev->dev, "An error occurred in the "
2141 "DASD device driver, reason=%s\n", "08");
2143 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2146 case 0x10: /* logging required for other channel program */
2147 erp = dasd_3990_erp_action_10_32(erp, sense);
2150 case 0x15: /* next track outside defined extend
2151 internal error 07 - The next track is not
2152 within the defined storage extent */
2153 dev_err(&device->cdev->dev,
2154 "An error occurred in the DASD device driver, "
2155 "reason=%s\n", "07");
2157 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2160 case 0x1B: /* unexpected condition during write */
2162 erp = dasd_3990_erp_action_1B_32(erp, sense);
2165 case 0x1C: /* invalid data */
2166 dev_emerg(&device->cdev->dev,
2167 "Data recovered during retry with PCI "
2168 "fetch mode active\n");
2170 /* not possible to handle this situation in Linux */
2172 ("Invalid data - No way to inform application "
2173 "about the possibly incorrect data");
2176 case 0x1D: /* state-change pending */
2177 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2178 "A State change pending condition exists "
2179 "for the subsystem or device");
2181 erp = dasd_3990_erp_action_4(erp, sense);
2184 case 0x1E: /* busy */
2185 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2186 "Busy condition exists "
2187 "for the subsystem or device");
2188 erp = dasd_3990_erp_action_4(erp, sense);
2191 default: /* all others errors - default erp */
2198 } /* end dasd_3990_erp_inspect_32 */
2201 *****************************************************************************
2202 * main ERP control functions (24 and 32 byte sense)
2203 *****************************************************************************
2207 * DASD_3990_ERP_CONTROL_CHECK
2210 * Does a generic inspection if a control check occured and sets up
2211 * the related error recovery procedure
2214 * erp pointer to the currently created default ERP
2217 * erp_filled pointer to the erp
2220 static struct dasd_ccw_req *
2221 dasd_3990_erp_control_check(struct dasd_ccw_req *erp)
2223 struct dasd_device *device = erp->startdev;
2225 if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK
2226 | SCHN_STAT_CHN_CTRL_CHK)) {
2227 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2228 "channel or interface control check");
2229 erp = dasd_3990_erp_action_4(erp, NULL);
2235 * DASD_3990_ERP_INSPECT
2238 * Does a detailed inspection for sense data by calling either
2239 * the 24-byte or the 32-byte inspection routine.
2242 * erp pointer to the currently created default ERP
2244 * erp_new contens was possibly modified
2246 static struct dasd_ccw_req *
2247 dasd_3990_erp_inspect(struct dasd_ccw_req *erp)
2250 struct dasd_ccw_req *erp_new = NULL;
2253 /* if this problem occured on an alias retry on base */
2254 erp_new = dasd_3990_erp_inspect_alias(erp);
2258 /* sense data are located in the refers record of the
2259 * already set up new ERP !
2260 * check if concurrent sens is available
2262 sense = dasd_get_sense(&erp->refers->irb);
2264 erp_new = dasd_3990_erp_control_check(erp);
2265 /* distinguish between 24 and 32 byte sense data */
2266 else if (sense[27] & DASD_SENSE_BIT_0) {
2268 /* inspect the 24 byte sense data */
2269 erp_new = dasd_3990_erp_inspect_24(erp, sense);
2273 /* inspect the 32 byte sense data */
2274 erp_new = dasd_3990_erp_inspect_32(erp, sense);
2276 } /* end distinguish between 24 and 32 byte sense data */
2282 * DASD_3990_ERP_ADD_ERP
2285 * This funtion adds an additional request block (ERP) to the head of
2286 * the given cqr (or erp).
2287 * For a command mode cqr the erp is initialized as an default erp
2289 * For transport mode we make a copy of the original TCW (points to
2290 * the original TCCB, TIDALs, etc.) but give it a fresh
2291 * TSB so the original sense data will not be changed.
2294 * cqr head of the current ERP-chain (or single cqr if
2297 * erp pointer to new ERP-chain head
2299 static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr)
2302 struct dasd_device *device = cqr->startdev;
2304 struct dasd_ccw_req *erp;
2305 int cplength, datasize;
2309 if (cqr->cpmode == 1) {
2311 /* TCW needs to be 64 byte aligned, so leave enough room */
2312 datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb);
2318 /* allocate additional request block */
2319 erp = dasd_alloc_erp_request((char *) &cqr->magic,
2320 cplength, datasize, device);
2322 if (cqr->retries <= 0) {
2323 DBF_DEV_EVENT(DBF_ERR, device, "%s",
2324 "Unable to allocate ERP request");
2325 cqr->status = DASD_CQR_FAILED;
2326 cqr->stopclk = get_clock ();
2328 DBF_DEV_EVENT(DBF_ERR, device,
2329 "Unable to allocate ERP request "
2330 "(%i retries left)",
2332 dasd_block_set_timer(device->block, (HZ << 3));
2338 if (cqr->cpmode == 1) {
2339 /* make a shallow copy of the original tcw but set new tsb */
2341 erp->cpaddr = PTR_ALIGN(erp->data, 64);
2343 tsb = (struct tsb *) &tcw[1];
2344 *tcw = *((struct tcw *)cqr->cpaddr);
2345 tcw->tsb = (long)tsb;
2346 } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) {
2347 /* PSF cannot be chained from NOOP/TIC */
2348 erp->cpaddr = cqr->cpaddr;
2350 /* initialize request with default TIC to current ERP/CQR */
2352 ccw->cmd_code = CCW_CMD_NOOP;
2353 ccw->flags = CCW_FLAG_CC;
2355 ccw->cmd_code = CCW_CMD_TIC;
2356 ccw->cda = (long)(cqr->cpaddr);
2359 erp->flags = cqr->flags;
2360 erp->function = dasd_3990_erp_add_erp;
2362 erp->startdev = device;
2363 erp->memdev = device;
2364 erp->block = cqr->block;
2365 erp->magic = cqr->magic;
2368 erp->buildclk = get_clock();
2369 erp->status = DASD_CQR_FILLED;
2375 * DASD_3990_ERP_ADDITIONAL_ERP
2378 * An additional ERP is needed to handle the current error.
2379 * Add ERP to the head of the ERP-chain containing the ERP processing
2380 * determined based on the sense data.
2383 * cqr head of the current ERP-chain (or single cqr if
2387 * erp pointer to new ERP-chain head
2389 static struct dasd_ccw_req *
2390 dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr)
2393 struct dasd_ccw_req *erp = NULL;
2395 /* add erp and initialize with default TIC */
2396 erp = dasd_3990_erp_add_erp(cqr);
2401 /* inspect sense, determine specific ERP if possible */
2404 erp = dasd_3990_erp_inspect(erp);
2409 } /* end dasd_3990_erp_additional_erp */
2412 * DASD_3990_ERP_ERROR_MATCH
2415 * Check if the device status of the given cqr is the same.
2416 * This means that the failed CCW and the relevant sense data
2418 * I don't distinguish between 24 and 32 byte sense because in case of
2419 * 24 byte sense byte 25 and 27 is set as well.
2422 * cqr1 first cqr, which will be compared with the
2426 * match 'boolean' for match found
2427 * returns 1 if match found, otherwise 0.
2429 static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1,
2430 struct dasd_ccw_req *cqr2)
2432 char *sense1, *sense2;
2434 if (cqr1->startdev != cqr2->startdev)
2437 sense1 = dasd_get_sense(&cqr1->irb);
2438 sense2 = dasd_get_sense(&cqr2->irb);
2440 /* one request has sense data, the other not -> no match, return 0 */
2441 if (!sense1 != !sense2)
2443 /* no sense data in both cases -> check cstat for IFCC */
2444 if (!sense1 && !sense2) {
2445 if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
2446 SCHN_STAT_CHN_CTRL_CHK)) ==
2447 (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
2448 SCHN_STAT_CHN_CTRL_CHK)))
2449 return 1; /* match with ifcc*/
2451 /* check sense data; byte 0-2,25,27 */
2452 if (!(sense1 && sense2 &&
2453 (memcmp(sense1, sense2, 3) == 0) &&
2454 (sense1[27] == sense2[27]) &&
2455 (sense1[25] == sense2[25]))) {
2457 return 0; /* sense doesn't match */
2460 return 1; /* match */
2462 } /* end dasd_3990_erp_error_match */
2465 * DASD_3990_ERP_IN_ERP
2468 * check if the current error already happened before.
2469 * quick exit if current cqr is not an ERP (cqr->refers=NULL)
2472 * cqr failed cqr (either original cqr or already an erp)
2475 * erp erp-pointer to the already defined error
2476 * recovery procedure OR
2477 * NULL if a 'new' error occurred.
2479 static struct dasd_ccw_req *
2480 dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr)
2483 struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */
2484 *erp_match = NULL; /* save erp chain head */
2485 int match = 0; /* 'boolean' for matching error found */
2487 if (cqr->refers == NULL) { /* return if not in erp */
2491 /* check the erp/cqr chain for current error */
2493 match = dasd_3990_erp_error_match(erp_head, cqr->refers);
2494 erp_match = cqr; /* save possible matching erp */
2495 cqr = cqr->refers; /* check next erp/cqr in queue */
2497 } while ((cqr->refers != NULL) && (!match));
2500 return NULL; /* no match was found */
2503 return erp_match; /* return address of matching erp */
2505 } /* END dasd_3990_erp_in_erp */
2508 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense)
2511 * No retry is left for the current ERP. Check what has to be done
2513 * - do further defined ERP action or
2514 * - wait for interrupt or
2515 * - exit with permanent error
2518 * erp ERP which is in progress with no retry left
2521 * erp modified/additional ERP
2523 static struct dasd_ccw_req *
2524 dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
2527 struct dasd_device *device = erp->startdev;
2528 char *sense = dasd_get_sense(&erp->irb);
2530 /* check for 24 byte sense ERP */
2531 if ((erp->function == dasd_3990_erp_bus_out) ||
2532 (erp->function == dasd_3990_erp_action_1) ||
2533 (erp->function == dasd_3990_erp_action_4)) {
2535 erp = dasd_3990_erp_action_1(erp);
2537 } else if (erp->function == dasd_3990_erp_action_1_sec) {
2538 erp = dasd_3990_erp_action_1_sec(erp);
2539 } else if (erp->function == dasd_3990_erp_action_5) {
2541 /* retries have not been successful */
2542 /* prepare erp for retry on different channel path */
2543 erp = dasd_3990_erp_action_1(erp);
2545 if (sense && !(sense[2] & DASD_SENSE_BIT_0)) {
2547 /* issue a Diagnostic Control command with an
2548 * Inhibit Write subcommand */
2550 switch (sense[25]) {
2552 case 0x57:{ /* controller */
2553 erp = dasd_3990_erp_DCTL(erp, 0x20);
2557 case 0x58:{ /* channel path */
2558 erp = dasd_3990_erp_DCTL(erp, 0x40);
2562 case 0x59:{ /* storage director */
2563 erp = dasd_3990_erp_DCTL(erp, 0x80);
2567 DBF_DEV_EVENT(DBF_WARNING, device,
2568 "invalid subcommand modifier 0x%x "
2569 "for Diagnostic Control Command",
2574 /* check for 32 byte sense ERP */
2576 ((erp->function == dasd_3990_erp_compound_retry) ||
2577 (erp->function == dasd_3990_erp_compound_path) ||
2578 (erp->function == dasd_3990_erp_compound_code) ||
2579 (erp->function == dasd_3990_erp_compound_config))) {
2581 erp = dasd_3990_erp_compound(erp, sense);
2585 * No retry left and no additional special handling
2588 dev_err(&device->cdev->dev,
2589 "ERP %p has run out of retries and failed\n", erp);
2591 erp->status = DASD_CQR_FAILED;
2596 } /* end dasd_3990_erp_further_erp */
2599 * DASD_3990_ERP_HANDLE_MATCH_ERP
2602 * An error occurred again and an ERP has been detected which is already
2603 * used to handle this error (e.g. retries).
2604 * All prior ERP's are asumed to be successful and therefore removed
2606 * If retry counter of matching erp is already 0, it is checked if further
2607 * action is needed (besides retry) or if the ERP has failed.
2610 * erp_head first ERP in ERP-chain
2611 * erp ERP that handles the actual error.
2615 * erp modified/additional ERP
2617 static struct dasd_ccw_req *
2618 dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
2619 struct dasd_ccw_req *erp)
2622 struct dasd_device *device = erp_head->startdev;
2623 struct dasd_ccw_req *erp_done = erp_head; /* finished req */
2624 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */
2626 /* loop over successful ERPs and remove them from chanq */
2627 while (erp_done != erp) {
2629 if (erp_done == NULL) /* end of chain reached */
2630 panic(PRINTK_HEADER "Programming error in ERP! The "
2631 "original request was lost\n");
2633 /* remove the request from the device queue */
2634 list_del(&erp_done->blocklist);
2636 erp_free = erp_done;
2637 erp_done = erp_done->refers;
2639 /* free the finished erp request */
2640 dasd_free_erp_request(erp_free, erp_free->memdev);
2644 if (erp->retries > 0) {
2646 char *sense = dasd_get_sense(&erp->refers->irb);
2648 /* check for special retries */
2649 if (sense && erp->function == dasd_3990_erp_action_4) {
2651 erp = dasd_3990_erp_action_4(erp, sense);
2654 erp->function == dasd_3990_erp_action_1B_32) {
2656 erp = dasd_3990_update_1B(erp, sense);
2658 } else if (sense && erp->function == dasd_3990_erp_int_req) {
2660 erp = dasd_3990_erp_int_req(erp);
2664 DBF_DEV_EVENT(DBF_DEBUG, device,
2665 "%i retries left for erp %p",
2668 /* handle the request again... */
2669 erp->status = DASD_CQR_FILLED;
2673 /* no retry left - check for further necessary action */
2674 /* if no further actions, handle rest as permanent error */
2675 erp = dasd_3990_erp_further_erp(erp);
2680 } /* end dasd_3990_erp_handle_match_erp */
2683 * DASD_3990_ERP_ACTION
2686 * control routine for 3990 erp actions.
2687 * Has to be called with the queue lock (namely the s390_irq_lock) acquired.
2690 * cqr failed cqr (either original cqr or already an erp)
2693 * erp erp-pointer to the head of the ERP action chain.
2695 * - either a ptr to an additional ERP cqr or
2696 * - the original given cqr (which's status might
2699 struct dasd_ccw_req *
2700 dasd_3990_erp_action(struct dasd_ccw_req * cqr)
2702 struct dasd_ccw_req *erp = NULL;
2703 struct dasd_device *device = cqr->startdev;
2704 struct dasd_ccw_req *temp_erp = NULL;
2706 if (device->features & DASD_FEATURE_ERPLOG) {
2707 /* print current erp_chain */
2708 dev_err(&device->cdev->dev,
2709 "ERP chain at BEGINNING of ERP-ACTION\n");
2710 for (temp_erp = cqr;
2711 temp_erp != NULL; temp_erp = temp_erp->refers) {
2713 dev_err(&device->cdev->dev,
2714 "ERP %p (%02x) refers to %p\n",
2715 temp_erp, temp_erp->status,
2720 /* double-check if current erp/cqr was successful */
2721 if ((scsw_cstat(&cqr->irb.scsw) == 0x00) &&
2722 (scsw_dstat(&cqr->irb.scsw) ==
2723 (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) {
2725 DBF_DEV_EVENT(DBF_DEBUG, device,
2726 "ERP called for successful request %p"
2727 " - NO ERP necessary", cqr);
2729 cqr->status = DASD_CQR_DONE;
2734 /* check if error happened before */
2735 erp = dasd_3990_erp_in_erp(cqr);
2738 /* no matching erp found - set up erp */
2739 erp = dasd_3990_erp_additional_erp(cqr);
2743 /* matching erp found - set all leading erp's to DONE */
2744 erp = dasd_3990_erp_handle_match_erp(cqr, erp);
2747 if (device->features & DASD_FEATURE_ERPLOG) {
2748 /* print current erp_chain */
2749 dev_err(&device->cdev->dev,
2750 "ERP chain at END of ERP-ACTION\n");
2751 for (temp_erp = erp;
2752 temp_erp != NULL; temp_erp = temp_erp->refers) {
2754 dev_err(&device->cdev->dev,
2755 "ERP %p (%02x) refers to %p\n",
2756 temp_erp, temp_erp->status,
2761 /* enqueue ERP request if it's a new one */
2762 if (list_empty(&erp->blocklist)) {
2763 cqr->status = DASD_CQR_IN_ERP;
2764 /* add erp request before the cqr */
2765 list_add_tail(&erp->blocklist, &cqr->blocklist);
2772 } /* end dasd_3990_erp_action */