1 // SPDX-License-Identifier: GPL-2.0
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 * Copyright IBM Corp. 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 = dasd_path_get_opm(device) &
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_tod_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 = dasd_path_get_opm(erp->startdev);
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 sync 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 sync 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 F - 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 if (!test_bit(DASD_CQR_SUPPRESS_CR, &erp->flags))
1057 dev_err(&device->cdev->dev,
1058 "An error occurred in the DASD device driver, reason=09\n");
1060 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1065 } /* end dasd_3990_erp_com_rej */
1068 * DASD_3990_ERP_BUS_OUT
1071 * Handles 24 byte 'Bus Out Parity Check' error.
1074 * erp current erp_head
1076 * erp new erp_head - pointer to new ERP
1078 static struct dasd_ccw_req *
1079 dasd_3990_erp_bus_out(struct dasd_ccw_req * erp)
1082 struct dasd_device *device = erp->startdev;
1084 /* first time set initial retry counter and erp_function */
1085 /* and retry once without blocking queue */
1086 /* (this enables easier enqueing of the cqr) */
1087 if (erp->function != dasd_3990_erp_bus_out) {
1089 erp->function = dasd_3990_erp_bus_out;
1093 /* issue a message and wait for 'device ready' interrupt */
1094 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1095 "bus out parity error or BOPC requested by "
1098 dasd_3990_erp_block_queue(erp, 60*HZ);
1104 } /* end dasd_3990_erp_bus_out */
1107 * DASD_3990_ERP_EQUIP_CHECK
1110 * Handles 24 byte 'Equipment Check' error.
1113 * erp current erp_head
1115 * erp new erp_head - pointer to new ERP
1117 static struct dasd_ccw_req *
1118 dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense)
1121 struct dasd_device *device = erp->startdev;
1123 erp->function = dasd_3990_erp_equip_check;
1125 if (sense[1] & SNS1_WRITE_INHIBITED) {
1126 dev_info(&device->cdev->dev,
1127 "Write inhibited path encountered\n");
1129 /* vary path offline
1130 internal error 04 - Path should be varied off-line.*/
1131 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1132 "device driver, reason=%s\n", "04");
1134 erp = dasd_3990_erp_action_1(erp);
1136 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1138 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1139 "Equipment Check - " "environmental data present");
1141 dasd_3990_handle_env_data(erp, sense);
1143 erp = dasd_3990_erp_action_4(erp, sense);
1145 } else if (sense[1] & SNS1_PERM_ERR) {
1147 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1148 "Equipment Check - retry exhausted or "
1151 erp = dasd_3990_erp_action_1(erp);
1154 /* all other equipment checks - Action 5 */
1155 /* rest is done when retries == 0 */
1156 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1157 "Equipment check or processing error");
1159 erp = dasd_3990_erp_action_5(erp);
1163 } /* end dasd_3990_erp_equip_check */
1166 * DASD_3990_ERP_DATA_CHECK
1169 * Handles 24 byte 'Data Check' error.
1172 * erp current erp_head
1174 * erp new erp_head - pointer to new ERP
1176 static struct dasd_ccw_req *
1177 dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense)
1180 struct dasd_device *device = erp->startdev;
1182 erp->function = dasd_3990_erp_data_check;
1184 if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */
1186 /* issue message that the data has been corrected */
1187 dev_emerg(&device->cdev->dev,
1188 "Data recovered during retry with PCI "
1189 "fetch mode active\n");
1191 /* not possible to handle this situation in Linux */
1192 panic("No way to inform application about the possibly "
1195 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1197 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1198 "Uncorrectable data check recovered secondary "
1199 "addr of duplex pair");
1201 erp = dasd_3990_erp_action_4(erp, sense);
1203 } else if (sense[1] & SNS1_PERM_ERR) {
1205 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1206 "Uncorrectable data check with internal "
1209 erp = dasd_3990_erp_action_1(erp);
1212 /* all other data checks */
1213 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1214 "Uncorrectable data check with retry count "
1217 erp = dasd_3990_erp_action_5(erp);
1222 } /* end dasd_3990_erp_data_check */
1225 * DASD_3990_ERP_OVERRUN
1228 * Handles 24 byte 'Overrun' error.
1231 * erp current erp_head
1233 * erp new erp_head - pointer to new ERP
1235 static struct dasd_ccw_req *
1236 dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense)
1239 struct dasd_device *device = erp->startdev;
1241 erp->function = dasd_3990_erp_overrun;
1243 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1244 "Overrun - service overrun or overrun"
1245 " error requested by channel");
1247 erp = dasd_3990_erp_action_5(erp);
1251 } /* end dasd_3990_erp_overrun */
1254 * DASD_3990_ERP_INV_FORMAT
1257 * Handles 24 byte 'Invalid Track Format' error.
1260 * erp current erp_head
1262 * erp new erp_head - pointer to new ERP
1264 static struct dasd_ccw_req *
1265 dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense)
1268 struct dasd_device *device = erp->startdev;
1270 erp->function = dasd_3990_erp_inv_format;
1272 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1274 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1275 "Track format error when destaging or "
1278 dasd_3990_handle_env_data(erp, sense);
1280 erp = dasd_3990_erp_action_4(erp, sense);
1283 /* internal error 06 - The track format is not valid*/
1284 dev_err(&device->cdev->dev,
1285 "An error occurred in the DASD device driver, "
1286 "reason=%s\n", "06");
1288 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1293 } /* end dasd_3990_erp_inv_format */
1299 * Handles 24 byte 'End-of-Cylinder' error.
1302 * erp already added default erp
1304 * erp pointer to original (failed) cqr.
1306 static struct dasd_ccw_req *
1307 dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense)
1310 struct dasd_device *device = default_erp->startdev;
1312 dev_err(&device->cdev->dev,
1313 "The cylinder data for accessing the DASD is inconsistent\n");
1315 /* implement action 7 - BUG */
1316 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1318 } /* end dasd_3990_erp_EOC */
1321 * DASD_3990_ERP_ENV_DATA
1324 * Handles 24 byte 'Environmental-Data Present' error.
1327 * erp current erp_head
1329 * erp new erp_head - pointer to new ERP
1331 static struct dasd_ccw_req *
1332 dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense)
1335 struct dasd_device *device = erp->startdev;
1337 erp->function = dasd_3990_erp_env_data;
1339 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Environmental data present");
1341 dasd_3990_handle_env_data(erp, sense);
1343 /* don't retry on disabled interface */
1344 if (sense[7] != 0x0F) {
1345 erp = dasd_3990_erp_action_4(erp, sense);
1347 erp->status = DASD_CQR_FILLED;
1352 } /* end dasd_3990_erp_env_data */
1355 * DASD_3990_ERP_NO_REC
1358 * Handles 24 byte 'No Record Found' error.
1361 * erp already added default ERP
1364 * erp new erp_head - pointer to new ERP
1366 static struct dasd_ccw_req *
1367 dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense)
1370 struct dasd_device *device = default_erp->startdev;
1373 * In some cases the 'No Record Found' error might be expected and
1374 * log messages shouldn't be written then.
1375 * Check if the according suppress bit is set.
1377 if (!test_bit(DASD_CQR_SUPPRESS_NRF, &default_erp->flags))
1378 dev_err(&device->cdev->dev,
1379 "The specified record was not found\n");
1381 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1383 } /* end dasd_3990_erp_no_rec */
1386 * DASD_3990_ERP_FILE_PROT
1389 * Handles 24 byte 'File Protected' error.
1390 * Note: Seek related recovery is not implemented because
1391 * wee don't use the seek command yet.
1394 * erp current erp_head
1396 * erp new erp_head - pointer to new ERP
1398 static struct dasd_ccw_req *
1399 dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
1402 struct dasd_device *device = erp->startdev;
1405 * In some cases the 'File Protected' error might be expected and
1406 * log messages shouldn't be written then.
1407 * Check if the according suppress bit is set.
1409 if (!test_bit(DASD_CQR_SUPPRESS_FP, &erp->flags))
1410 dev_err(&device->cdev->dev,
1411 "Accessing the DASD failed because of a hardware error\n");
1413 return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1415 } /* end dasd_3990_erp_file_prot */
1418 * DASD_3990_ERP_INSPECT_ALIAS
1421 * Checks if the original request was started on an alias device.
1422 * If yes, it modifies the original and the erp request so that
1423 * the erp request can be started on a base device.
1426 * erp pointer to the currently created default ERP
1429 * erp pointer to the modified ERP, or NULL
1432 static struct dasd_ccw_req *dasd_3990_erp_inspect_alias(
1433 struct dasd_ccw_req *erp)
1435 struct dasd_ccw_req *cqr = erp->refers;
1439 (cqr->block->base != cqr->startdev)) {
1441 sense = dasd_get_sense(&erp->refers->irb);
1443 * dynamic pav may have changed base alias mapping
1445 if (!test_bit(DASD_FLAG_OFFLINE, &cqr->startdev->flags) && sense
1446 && (sense[0] == 0x10) && (sense[7] == 0x0F)
1447 && (sense[8] == 0x67)) {
1449 * remove device from alias handling to prevent new
1450 * requests from being scheduled on the
1451 * wrong alias device
1453 dasd_alias_remove_device(cqr->startdev);
1455 /* schedule worker to reload device */
1456 dasd_reload_device(cqr->startdev);
1459 if (cqr->startdev->features & DASD_FEATURE_ERPLOG) {
1460 DBF_DEV_EVENT(DBF_ERR, cqr->startdev,
1461 "ERP on alias device for request %p,"
1462 " recover on base device %s", cqr,
1463 dev_name(&cqr->block->base->cdev->dev));
1465 dasd_eckd_reset_ccw_to_base_io(cqr);
1466 erp->startdev = cqr->block->base;
1467 erp->function = dasd_3990_erp_inspect_alias;
1475 * DASD_3990_ERP_INSPECT_24
1478 * Does a detailed inspection of the 24 byte sense data
1479 * and sets up a related error recovery action.
1482 * sense sense data of the actual error
1483 * erp pointer to the currently created default ERP
1486 * erp pointer to the (addtitional) ERP
1488 static struct dasd_ccw_req *
1489 dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense)
1492 struct dasd_ccw_req *erp_filled = NULL;
1494 /* Check sense for .... */
1495 /* 'Command Reject' */
1496 if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) {
1497 erp_filled = dasd_3990_erp_com_rej(erp, sense);
1499 /* 'Intervention Required' */
1500 if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) {
1501 erp_filled = dasd_3990_erp_int_req(erp);
1503 /* 'Bus Out Parity Check' */
1504 if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) {
1505 erp_filled = dasd_3990_erp_bus_out(erp);
1507 /* 'Equipment Check' */
1508 if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) {
1509 erp_filled = dasd_3990_erp_equip_check(erp, sense);
1512 if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) {
1513 erp_filled = dasd_3990_erp_data_check(erp, sense);
1516 if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) {
1517 erp_filled = dasd_3990_erp_overrun(erp, sense);
1519 /* 'Invalid Track Format' */
1520 if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) {
1521 erp_filled = dasd_3990_erp_inv_format(erp, sense);
1523 /* 'End-of-Cylinder' */
1524 if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) {
1525 erp_filled = dasd_3990_erp_EOC(erp, sense);
1527 /* 'Environmental Data' */
1528 if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) {
1529 erp_filled = dasd_3990_erp_env_data(erp, sense);
1531 /* 'No Record Found' */
1532 if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) {
1533 erp_filled = dasd_3990_erp_no_rec(erp, sense);
1535 /* 'File Protected' */
1536 if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) {
1537 erp_filled = dasd_3990_erp_file_prot(erp);
1539 /* other (unknown) error - do default ERP */
1540 if (erp_filled == NULL) {
1547 } /* END dasd_3990_erp_inspect_24 */
1550 *****************************************************************************
1551 * 32 byte sense ERP functions (only)
1552 *****************************************************************************
1556 * DASD_3990_ERPACTION_10_32
1559 * Handles 32 byte 'Action 10' of Single Program Action Codes.
1560 * Just retry and if retry doesn't work, return with error.
1563 * erp current erp_head
1564 * sense current sense data
1566 * erp modified erp_head
1568 static struct dasd_ccw_req *
1569 dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense)
1572 struct dasd_device *device = erp->startdev;
1575 erp->function = dasd_3990_erp_action_10_32;
1577 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Perform logging requested");
1581 } /* end dasd_3990_erp_action_10_32 */
1584 * DASD_3990_ERP_ACTION_1B_32
1587 * Handles 32 byte 'Action 1B' of Single Program Action Codes.
1588 * A write operation could not be finished because of an unexpected
1590 * The already created 'default erp' is used to get the link to
1591 * the erp chain, but it can not be used for this recovery
1592 * action because it contains no DE/LO data space.
1595 * default_erp already added default erp.
1596 * sense current sense data
1600 * default_erp in case of imprecise ending or error
1602 static struct dasd_ccw_req *
1603 dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1606 struct dasd_device *device = default_erp->startdev;
1608 struct dasd_ccw_req *cqr;
1609 struct dasd_ccw_req *erp;
1610 struct DE_eckd_data *DE_data;
1611 struct PFX_eckd_data *PFX_data;
1612 char *LO_data; /* LO_eckd_data_t */
1613 struct ccw1 *ccw, *oldccw;
1615 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1616 "Write not finished because of unexpected condition");
1618 default_erp->function = dasd_3990_erp_action_1B_32;
1620 /* determine the original cqr */
1623 while (cqr->refers != NULL) {
1627 if (scsw_is_tm(&cqr->irb.scsw)) {
1628 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1629 "32 bit sense, action 1B is not defined"
1630 " in transport mode - just retry");
1634 /* for imprecise ending just do default erp */
1635 if (sense[1] & 0x01) {
1636 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1637 "Imprecise ending is set - just retry");
1642 /* determine the address of the CCW to be restarted */
1643 /* Imprecise ending is not set -> addr from IRB-SCSW */
1644 cpa = default_erp->refers->irb.scsw.cmd.cpa;
1647 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1648 "Unable to determine address of the CCW "
1651 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1654 /* Build new ERP request including DE/LO */
1655 erp = dasd_alloc_erp_request((char *) &cqr->magic,
1656 2 + 1,/* DE/LO + TIC */
1657 sizeof(struct DE_eckd_data) +
1658 sizeof(struct LO_eckd_data), device);
1661 /* internal error 01 - Unable to allocate ERP */
1662 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1663 "device driver, reason=%s\n", "01");
1664 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1667 /* use original DE */
1668 DE_data = erp->data;
1669 oldccw = cqr->cpaddr;
1670 if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) {
1671 PFX_data = cqr->data;
1672 memcpy(DE_data, &PFX_data->define_extent,
1673 sizeof(struct DE_eckd_data));
1675 memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data));
1678 LO_data = erp->data + sizeof(struct DE_eckd_data);
1680 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1682 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1685 if ((sense[7] & 0x3F) == 0x01) {
1686 /* operation code is WRITE DATA -> data area orientation */
1689 } else if ((sense[7] & 0x3F) == 0x03) {
1690 /* operation code is FORMAT WRITE -> index orientation */
1694 LO_data[0] = sense[7]; /* operation */
1697 LO_data[1] = sense[8]; /* auxiliary */
1698 LO_data[2] = sense[9];
1699 LO_data[3] = sense[3]; /* count */
1700 LO_data[4] = sense[29]; /* seek_addr.cyl */
1701 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1702 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1704 memcpy(&(LO_data[8]), &(sense[11]), 8);
1708 memset(ccw, 0, sizeof(struct ccw1));
1709 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
1710 ccw->flags = CCW_FLAG_CC;
1712 ccw->cda = (__u32)(addr_t) DE_data;
1716 memset(ccw, 0, sizeof(struct ccw1));
1717 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
1718 ccw->flags = CCW_FLAG_CC;
1720 ccw->cda = (__u32)(addr_t) LO_data;
1722 /* TIC to the failed ccw */
1724 ccw->cmd_code = CCW_CMD_TIC;
1727 /* fill erp related fields */
1728 erp->flags = default_erp->flags;
1729 erp->function = dasd_3990_erp_action_1B_32;
1730 erp->refers = default_erp->refers;
1731 erp->startdev = device;
1732 erp->memdev = device;
1733 erp->magic = default_erp->magic;
1734 erp->expires = default_erp->expires;
1736 erp->buildclk = get_tod_clock();
1737 erp->status = DASD_CQR_FILLED;
1739 /* remove the default erp */
1740 dasd_free_erp_request(default_erp, device);
1744 } /* end dasd_3990_erp_action_1B_32 */
1747 * DASD_3990_UPDATE_1B
1750 * Handles the update to the 32 byte 'Action 1B' of Single Program
1751 * Action Codes in case the first action was not successful.
1752 * The already created 'previous_erp' is the currently not successful
1756 * previous_erp already created previous erp.
1757 * sense current sense data
1761 static struct dasd_ccw_req *
1762 dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
1765 struct dasd_device *device = previous_erp->startdev;
1767 struct dasd_ccw_req *cqr;
1768 struct dasd_ccw_req *erp;
1769 char *LO_data; /* struct LO_eckd_data */
1772 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1773 "Write not finished because of unexpected condition"
1776 /* determine the original cqr */
1779 while (cqr->refers != NULL) {
1783 if (scsw_is_tm(&cqr->irb.scsw)) {
1784 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1785 "32 bit sense, action 1B, update,"
1786 " in transport mode - just retry");
1787 return previous_erp;
1790 /* for imprecise ending just do default erp */
1791 if (sense[1] & 0x01) {
1792 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1793 "Imprecise ending is set - just retry");
1795 previous_erp->status = DASD_CQR_FILLED;
1797 return previous_erp;
1800 /* determine the address of the CCW to be restarted */
1801 /* Imprecise ending is not set -> addr from IRB-SCSW */
1802 cpa = previous_erp->irb.scsw.cmd.cpa;
1805 /* internal error 02 -
1806 Unable to determine address of the CCW to be restarted */
1807 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1808 "device driver, reason=%s\n", "02");
1810 previous_erp->status = DASD_CQR_FAILED;
1812 return previous_erp;
1817 /* update the LO with the new returned sense data */
1818 LO_data = erp->data + sizeof(struct DE_eckd_data);
1820 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1821 /* should not happen */
1822 previous_erp->status = DASD_CQR_FAILED;
1824 return previous_erp;
1827 if ((sense[7] & 0x3F) == 0x01) {
1828 /* operation code is WRITE DATA -> data area orientation */
1831 } else if ((sense[7] & 0x3F) == 0x03) {
1832 /* operation code is FORMAT WRITE -> index orientation */
1836 LO_data[0] = sense[7]; /* operation */
1839 LO_data[1] = sense[8]; /* auxiliary */
1840 LO_data[2] = sense[9];
1841 LO_data[3] = sense[3]; /* count */
1842 LO_data[4] = sense[29]; /* seek_addr.cyl */
1843 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1844 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1846 memcpy(&(LO_data[8]), &(sense[11]), 8);
1848 /* TIC to the failed ccw */
1849 ccw = erp->cpaddr; /* addr of DE ccw */
1850 ccw++; /* addr of LE ccw */
1851 ccw++; /* addr of TIC ccw */
1854 erp->status = DASD_CQR_FILLED;
1858 } /* end dasd_3990_update_1B */
1861 * DASD_3990_ERP_COMPOUND_RETRY
1864 * Handles the compound ERP action retry code.
1865 * NOTE: At least one retry is done even if zero is specified
1866 * by the sense data. This makes enqueueing of the request
1870 * sense sense data of the actual error
1871 * erp pointer to the currently created ERP
1874 * erp modified ERP pointer
1878 dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense)
1881 switch (sense[25] & 0x03) {
1882 case 0x00: /* no not retry */
1886 case 0x01: /* retry 2 times */
1890 case 0x02: /* retry 10 times */
1894 case 0x03: /* retry 256 times */
1902 erp->function = dasd_3990_erp_compound_retry;
1904 } /* end dasd_3990_erp_compound_retry */
1907 * DASD_3990_ERP_COMPOUND_PATH
1910 * Handles the compound ERP action for retry on alternate
1914 * sense sense data of the actual error
1915 * erp pointer to the currently created ERP
1918 * erp modified ERP pointer
1922 dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
1924 if (sense[25] & DASD_SENSE_BIT_3) {
1925 dasd_3990_erp_alternate_path(erp);
1927 if (erp->status == DASD_CQR_FAILED &&
1928 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
1929 /* reset the lpm and the status to be able to
1930 * try further actions. */
1931 erp->lpm = dasd_path_get_opm(erp->startdev);
1932 erp->status = DASD_CQR_NEED_ERP;
1936 erp->function = dasd_3990_erp_compound_path;
1938 } /* end dasd_3990_erp_compound_path */
1941 * DASD_3990_ERP_COMPOUND_CODE
1944 * Handles the compound ERP action for retry code.
1947 * sense sense data of the actual error
1948 * erp pointer to the currently created ERP
1951 * erp NEW ERP pointer
1954 static struct dasd_ccw_req *
1955 dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense)
1958 if (sense[25] & DASD_SENSE_BIT_2) {
1960 switch (sense[28]) {
1962 /* issue a Diagnostic Control command with an
1963 * Inhibit Write subcommand and controller modifier */
1964 erp = dasd_3990_erp_DCTL(erp, 0x20);
1968 /* wait for 5 seconds and retry again */
1971 dasd_3990_erp_block_queue (erp, 5*HZ);
1975 /* should not happen - continue */
1980 erp->function = dasd_3990_erp_compound_code;
1984 } /* end dasd_3990_erp_compound_code */
1987 * DASD_3990_ERP_COMPOUND_CONFIG
1990 * Handles the compound ERP action for configruation
1992 * Note: duplex handling is not implemented (yet).
1995 * sense sense data of the actual error
1996 * erp pointer to the currently created ERP
1999 * erp modified ERP pointer
2003 dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
2006 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) {
2008 /* set to suspended duplex state then restart
2009 internal error 05 - Set device to suspended duplex state
2011 struct dasd_device *device = erp->startdev;
2012 dev_err(&device->cdev->dev,
2013 "An error occurred in the DASD device driver, "
2014 "reason=%s\n", "05");
2018 erp->function = dasd_3990_erp_compound_config;
2020 } /* end dasd_3990_erp_compound_config */
2023 * DASD_3990_ERP_COMPOUND
2026 * Does the further compound program action if
2027 * compound retry was not successful.
2030 * sense sense data of the actual error
2031 * erp pointer to the current (failed) ERP
2034 * erp (additional) ERP pointer
2037 static struct dasd_ccw_req *
2038 dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense)
2041 if ((erp->function == dasd_3990_erp_compound_retry) &&
2042 (erp->status == DASD_CQR_NEED_ERP)) {
2044 dasd_3990_erp_compound_path(erp, sense);
2047 if ((erp->function == dasd_3990_erp_compound_path) &&
2048 (erp->status == DASD_CQR_NEED_ERP)) {
2050 erp = dasd_3990_erp_compound_code(erp, sense);
2053 if ((erp->function == dasd_3990_erp_compound_code) &&
2054 (erp->status == DASD_CQR_NEED_ERP)) {
2056 dasd_3990_erp_compound_config(erp, sense);
2059 /* if no compound action ERP specified, the request failed */
2060 if (erp->status == DASD_CQR_NEED_ERP)
2061 erp->status = DASD_CQR_FAILED;
2065 } /* end dasd_3990_erp_compound */
2068 *DASD_3990_ERP_HANDLE_SIM
2071 * inspects the SIM SENSE data and starts an appropriate action
2074 * sense sense data of the actual error
2080 dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense)
2082 /* print message according to log or message to operator mode */
2083 if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) {
2084 /* print SIM SRC from RefCode */
2085 dev_err(&device->cdev->dev, "SIM - SRC: "
2086 "%02x%02x%02x%02x\n", sense[22],
2087 sense[23], sense[11], sense[12]);
2088 } else if (sense[24] & DASD_SIM_LOG) {
2089 /* print SIM SRC Refcode */
2090 dev_warn(&device->cdev->dev, "log SIM - SRC: "
2091 "%02x%02x%02x%02x\n", sense[22],
2092 sense[23], sense[11], sense[12]);
2097 * DASD_3990_ERP_INSPECT_32
2100 * Does a detailed inspection of the 32 byte sense data
2101 * and sets up a related error recovery action.
2104 * sense sense data of the actual error
2105 * erp pointer to the currently created default ERP
2108 * erp_filled pointer to the ERP
2111 static struct dasd_ccw_req *
2112 dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
2115 struct dasd_device *device = erp->startdev;
2117 erp->function = dasd_3990_erp_inspect_32;
2119 /* check for SIM sense data */
2120 if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)
2121 dasd_3990_erp_handle_sim(device, sense);
2123 if (sense[25] & DASD_SENSE_BIT_0) {
2125 /* compound program action codes (byte25 bit 0 == '1') */
2126 dasd_3990_erp_compound_retry(erp, sense);
2130 /* single program action codes (byte25 bit 0 == '0') */
2131 switch (sense[25]) {
2133 case 0x00: /* success - use default ERP for retries */
2134 DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
2135 "ERP called for successful request"
2139 case 0x01: /* fatal error */
2140 dev_err(&device->cdev->dev,
2141 "ERP failed for the DASD\n");
2143 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2146 case 0x02: /* intervention required */
2147 case 0x03: /* intervention required during dual copy */
2148 erp = dasd_3990_erp_int_req(erp);
2151 case 0x0F: /* length mismatch during update write command
2152 internal error 08 - update write command error*/
2153 dev_err(&device->cdev->dev, "An error occurred in the "
2154 "DASD device driver, reason=%s\n", "08");
2156 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2159 case 0x10: /* logging required for other channel program */
2160 erp = dasd_3990_erp_action_10_32(erp, sense);
2163 case 0x15: /* next track outside defined extend
2164 internal error 07 - The next track is not
2165 within the defined storage extent */
2166 dev_err(&device->cdev->dev,
2167 "An error occurred in the DASD device driver, "
2168 "reason=%s\n", "07");
2170 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2173 case 0x1B: /* unexpected condition during write */
2175 erp = dasd_3990_erp_action_1B_32(erp, sense);
2178 case 0x1C: /* invalid data */
2179 dev_emerg(&device->cdev->dev,
2180 "Data recovered during retry with PCI "
2181 "fetch mode active\n");
2183 /* not possible to handle this situation in Linux */
2185 ("Invalid data - No way to inform application "
2186 "about the possibly incorrect data");
2189 case 0x1D: /* state-change pending */
2190 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2191 "A State change pending condition exists "
2192 "for the subsystem or device");
2194 erp = dasd_3990_erp_action_4(erp, sense);
2197 case 0x1E: /* busy */
2198 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2199 "Busy condition exists "
2200 "for the subsystem or device");
2201 erp = dasd_3990_erp_action_4(erp, sense);
2204 default: /* all others errors - default erp */
2211 } /* end dasd_3990_erp_inspect_32 */
2213 static void dasd_3990_erp_disable_path(struct dasd_device *device, __u8 lpum)
2215 int pos = pathmask_to_pos(lpum);
2217 /* no remaining path, cannot disable */
2218 if (!(dasd_path_get_opm(device) & ~lpum))
2221 dev_err(&device->cdev->dev,
2222 "Path %x.%02x (pathmask %02x) is disabled - IFCC threshold exceeded\n",
2223 device->path[pos].cssid, device->path[pos].chpid, lpum);
2224 dasd_path_remove_opm(device, lpum);
2225 dasd_path_add_ifccpm(device, lpum);
2226 device->path[pos].errorclk = 0;
2227 atomic_set(&device->path[pos].error_count, 0);
2230 static void dasd_3990_erp_account_error(struct dasd_ccw_req *erp)
2232 struct dasd_device *device = erp->startdev;
2233 __u8 lpum = erp->refers->irb.esw.esw1.lpum;
2234 int pos = pathmask_to_pos(lpum);
2237 if (!device->path_thrhld)
2240 clk = get_tod_clock();
2242 * check if the last error is longer ago than the timeout,
2243 * if so reset error state
2245 if ((tod_to_ns(clk - device->path[pos].errorclk) / NSEC_PER_SEC)
2246 >= device->path_interval) {
2247 atomic_set(&device->path[pos].error_count, 0);
2248 device->path[pos].errorclk = 0;
2250 atomic_inc(&device->path[pos].error_count);
2251 device->path[pos].errorclk = clk;
2252 /* threshold exceeded disable path if possible */
2253 if (atomic_read(&device->path[pos].error_count) >=
2254 device->path_thrhld)
2255 dasd_3990_erp_disable_path(device, lpum);
2259 *****************************************************************************
2260 * main ERP control functions (24 and 32 byte sense)
2261 *****************************************************************************
2265 * DASD_3990_ERP_CONTROL_CHECK
2268 * Does a generic inspection if a control check occurred and sets up
2269 * the related error recovery procedure
2272 * erp pointer to the currently created default ERP
2275 * erp_filled pointer to the erp
2278 static struct dasd_ccw_req *
2279 dasd_3990_erp_control_check(struct dasd_ccw_req *erp)
2281 struct dasd_device *device = erp->startdev;
2283 if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK
2284 | SCHN_STAT_CHN_CTRL_CHK)) {
2285 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2286 "channel or interface control check");
2287 dasd_3990_erp_account_error(erp);
2288 erp = dasd_3990_erp_action_4(erp, NULL);
2294 * DASD_3990_ERP_INSPECT
2297 * Does a detailed inspection for sense data by calling either
2298 * the 24-byte or the 32-byte inspection routine.
2301 * erp pointer to the currently created default ERP
2303 * erp_new contens was possibly modified
2305 static struct dasd_ccw_req *
2306 dasd_3990_erp_inspect(struct dasd_ccw_req *erp)
2309 struct dasd_ccw_req *erp_new = NULL;
2312 /* if this problem occurred on an alias retry on base */
2313 erp_new = dasd_3990_erp_inspect_alias(erp);
2317 /* sense data are located in the refers record of the
2318 * already set up new ERP !
2319 * check if concurrent sens is available
2321 sense = dasd_get_sense(&erp->refers->irb);
2323 erp_new = dasd_3990_erp_control_check(erp);
2324 /* distinguish between 24 and 32 byte sense data */
2325 else if (sense[27] & DASD_SENSE_BIT_0) {
2327 /* inspect the 24 byte sense data */
2328 erp_new = dasd_3990_erp_inspect_24(erp, sense);
2332 /* inspect the 32 byte sense data */
2333 erp_new = dasd_3990_erp_inspect_32(erp, sense);
2335 } /* end distinguish between 24 and 32 byte sense data */
2341 * DASD_3990_ERP_ADD_ERP
2344 * This function adds an additional request block (ERP) to the head of
2345 * the given cqr (or erp).
2346 * For a command mode cqr the erp is initialized as an default erp
2348 * For transport mode we make a copy of the original TCW (points to
2349 * the original TCCB, TIDALs, etc.) but give it a fresh
2350 * TSB so the original sense data will not be changed.
2353 * cqr head of the current ERP-chain (or single cqr if
2356 * erp pointer to new ERP-chain head
2358 static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr)
2361 struct dasd_device *device = cqr->startdev;
2363 struct dasd_ccw_req *erp;
2364 int cplength, datasize;
2368 if (cqr->cpmode == 1) {
2370 /* TCW needs to be 64 byte aligned, so leave enough room */
2371 datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb);
2377 /* allocate additional request block */
2378 erp = dasd_alloc_erp_request((char *) &cqr->magic,
2379 cplength, datasize, device);
2381 if (cqr->retries <= 0) {
2382 DBF_DEV_EVENT(DBF_ERR, device, "%s",
2383 "Unable to allocate ERP request");
2384 cqr->status = DASD_CQR_FAILED;
2385 cqr->stopclk = get_tod_clock();
2387 DBF_DEV_EVENT(DBF_ERR, device,
2388 "Unable to allocate ERP request "
2389 "(%i retries left)",
2391 dasd_block_set_timer(device->block, (HZ << 3));
2397 if (cqr->cpmode == 1) {
2398 /* make a shallow copy of the original tcw but set new tsb */
2400 erp->cpaddr = PTR_ALIGN(erp->data, 64);
2402 tsb = (struct tsb *) &tcw[1];
2403 *tcw = *((struct tcw *)cqr->cpaddr);
2404 tcw->tsb = (long)tsb;
2405 } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) {
2406 /* PSF cannot be chained from NOOP/TIC */
2407 erp->cpaddr = cqr->cpaddr;
2409 /* initialize request with default TIC to current ERP/CQR */
2411 ccw->cmd_code = CCW_CMD_NOOP;
2412 ccw->flags = CCW_FLAG_CC;
2414 ccw->cmd_code = CCW_CMD_TIC;
2415 ccw->cda = (long)(cqr->cpaddr);
2418 erp->flags = cqr->flags;
2419 erp->function = dasd_3990_erp_add_erp;
2421 erp->startdev = device;
2422 erp->memdev = device;
2423 erp->block = cqr->block;
2424 erp->magic = cqr->magic;
2425 erp->expires = cqr->expires;
2427 erp->buildclk = get_tod_clock();
2428 erp->status = DASD_CQR_FILLED;
2434 * DASD_3990_ERP_ADDITIONAL_ERP
2437 * An additional ERP is needed to handle the current error.
2438 * Add ERP to the head of the ERP-chain containing the ERP processing
2439 * determined based on the sense data.
2442 * cqr head of the current ERP-chain (or single cqr if
2446 * erp pointer to new ERP-chain head
2448 static struct dasd_ccw_req *
2449 dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr)
2452 struct dasd_ccw_req *erp = NULL;
2454 /* add erp and initialize with default TIC */
2455 erp = dasd_3990_erp_add_erp(cqr);
2460 /* inspect sense, determine specific ERP if possible */
2463 erp = dasd_3990_erp_inspect(erp);
2468 } /* end dasd_3990_erp_additional_erp */
2471 * DASD_3990_ERP_ERROR_MATCH
2474 * Check if the device status of the given cqr is the same.
2475 * This means that the failed CCW and the relevant sense data
2477 * I don't distinguish between 24 and 32 byte sense because in case of
2478 * 24 byte sense byte 25 and 27 is set as well.
2481 * cqr1 first cqr, which will be compared with the
2485 * match 'boolean' for match found
2486 * returns 1 if match found, otherwise 0.
2488 static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1,
2489 struct dasd_ccw_req *cqr2)
2491 char *sense1, *sense2;
2493 if (cqr1->startdev != cqr2->startdev)
2496 sense1 = dasd_get_sense(&cqr1->irb);
2497 sense2 = dasd_get_sense(&cqr2->irb);
2499 /* one request has sense data, the other not -> no match, return 0 */
2500 if (!sense1 != !sense2)
2502 /* no sense data in both cases -> check cstat for IFCC */
2503 if (!sense1 && !sense2) {
2504 if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
2505 SCHN_STAT_CHN_CTRL_CHK)) ==
2506 (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
2507 SCHN_STAT_CHN_CTRL_CHK)))
2508 return 1; /* match with ifcc*/
2510 /* check sense data; byte 0-2,25,27 */
2511 if (!(sense1 && sense2 &&
2512 (memcmp(sense1, sense2, 3) == 0) &&
2513 (sense1[27] == sense2[27]) &&
2514 (sense1[25] == sense2[25]))) {
2516 return 0; /* sense doesn't match */
2519 return 1; /* match */
2521 } /* end dasd_3990_erp_error_match */
2524 * DASD_3990_ERP_IN_ERP
2527 * check if the current error already happened before.
2528 * quick exit if current cqr is not an ERP (cqr->refers=NULL)
2531 * cqr failed cqr (either original cqr or already an erp)
2534 * erp erp-pointer to the already defined error
2535 * recovery procedure OR
2536 * NULL if a 'new' error occurred.
2538 static struct dasd_ccw_req *
2539 dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr)
2542 struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */
2543 *erp_match = NULL; /* save erp chain head */
2544 int match = 0; /* 'boolean' for matching error found */
2546 if (cqr->refers == NULL) { /* return if not in erp */
2550 /* check the erp/cqr chain for current error */
2552 match = dasd_3990_erp_error_match(erp_head, cqr->refers);
2553 erp_match = cqr; /* save possible matching erp */
2554 cqr = cqr->refers; /* check next erp/cqr in queue */
2556 } while ((cqr->refers != NULL) && (!match));
2559 return NULL; /* no match was found */
2562 return erp_match; /* return address of matching erp */
2564 } /* END dasd_3990_erp_in_erp */
2567 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense)
2570 * No retry is left for the current ERP. Check what has to be done
2572 * - do further defined ERP action or
2573 * - wait for interrupt or
2574 * - exit with permanent error
2577 * erp ERP which is in progress with no retry left
2580 * erp modified/additional ERP
2582 static struct dasd_ccw_req *
2583 dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
2586 struct dasd_device *device = erp->startdev;
2587 char *sense = dasd_get_sense(&erp->irb);
2589 /* check for 24 byte sense ERP */
2590 if ((erp->function == dasd_3990_erp_bus_out) ||
2591 (erp->function == dasd_3990_erp_action_1) ||
2592 (erp->function == dasd_3990_erp_action_4)) {
2594 erp = dasd_3990_erp_action_1(erp);
2596 } else if (erp->function == dasd_3990_erp_action_1_sec) {
2597 erp = dasd_3990_erp_action_1_sec(erp);
2598 } else if (erp->function == dasd_3990_erp_action_5) {
2600 /* retries have not been successful */
2601 /* prepare erp for retry on different channel path */
2602 erp = dasd_3990_erp_action_1(erp);
2604 if (sense && !(sense[2] & DASD_SENSE_BIT_0)) {
2606 /* issue a Diagnostic Control command with an
2607 * Inhibit Write subcommand */
2609 switch (sense[25]) {
2611 case 0x57:{ /* controller */
2612 erp = dasd_3990_erp_DCTL(erp, 0x20);
2616 case 0x58:{ /* channel path */
2617 erp = dasd_3990_erp_DCTL(erp, 0x40);
2621 case 0x59:{ /* storage director */
2622 erp = dasd_3990_erp_DCTL(erp, 0x80);
2626 DBF_DEV_EVENT(DBF_WARNING, device,
2627 "invalid subcommand modifier 0x%x "
2628 "for Diagnostic Control Command",
2633 /* check for 32 byte sense ERP */
2635 ((erp->function == dasd_3990_erp_compound_retry) ||
2636 (erp->function == dasd_3990_erp_compound_path) ||
2637 (erp->function == dasd_3990_erp_compound_code) ||
2638 (erp->function == dasd_3990_erp_compound_config))) {
2640 erp = dasd_3990_erp_compound(erp, sense);
2644 * No retry left and no additional special handling
2647 dev_err(&device->cdev->dev,
2648 "ERP %p has run out of retries and failed\n", erp);
2650 erp->status = DASD_CQR_FAILED;
2655 } /* end dasd_3990_erp_further_erp */
2658 * DASD_3990_ERP_HANDLE_MATCH_ERP
2661 * An error occurred again and an ERP has been detected which is already
2662 * used to handle this error (e.g. retries).
2663 * All prior ERP's are asumed to be successful and therefore removed
2665 * If retry counter of matching erp is already 0, it is checked if further
2666 * action is needed (besides retry) or if the ERP has failed.
2669 * erp_head first ERP in ERP-chain
2670 * erp ERP that handles the actual error.
2674 * erp modified/additional ERP
2676 static struct dasd_ccw_req *
2677 dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
2678 struct dasd_ccw_req *erp)
2681 struct dasd_device *device = erp_head->startdev;
2682 struct dasd_ccw_req *erp_done = erp_head; /* finished req */
2683 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */
2685 /* loop over successful ERPs and remove them from chanq */
2686 while (erp_done != erp) {
2688 if (erp_done == NULL) /* end of chain reached */
2689 panic(PRINTK_HEADER "Programming error in ERP! The "
2690 "original request was lost\n");
2692 /* remove the request from the device queue */
2693 list_del(&erp_done->blocklist);
2695 erp_free = erp_done;
2696 erp_done = erp_done->refers;
2698 /* free the finished erp request */
2699 dasd_free_erp_request(erp_free, erp_free->memdev);
2703 if (erp->retries > 0) {
2705 char *sense = dasd_get_sense(&erp->refers->irb);
2707 /* check for special retries */
2708 if (sense && erp->function == dasd_3990_erp_action_4) {
2710 erp = dasd_3990_erp_action_4(erp, sense);
2713 erp->function == dasd_3990_erp_action_1B_32) {
2715 erp = dasd_3990_update_1B(erp, sense);
2717 } else if (sense && erp->function == dasd_3990_erp_int_req) {
2719 erp = dasd_3990_erp_int_req(erp);
2723 DBF_DEV_EVENT(DBF_DEBUG, device,
2724 "%i retries left for erp %p",
2727 /* handle the request again... */
2728 erp->status = DASD_CQR_FILLED;
2732 /* no retry left - check for further necessary action */
2733 /* if no further actions, handle rest as permanent error */
2734 erp = dasd_3990_erp_further_erp(erp);
2739 } /* end dasd_3990_erp_handle_match_erp */
2742 * DASD_3990_ERP_ACTION
2745 * control routine for 3990 erp actions.
2746 * Has to be called with the queue lock (namely the s390_irq_lock) acquired.
2749 * cqr failed cqr (either original cqr or already an erp)
2752 * erp erp-pointer to the head of the ERP action chain.
2754 * - either a ptr to an additional ERP cqr or
2755 * - the original given cqr (which's status might
2758 struct dasd_ccw_req *
2759 dasd_3990_erp_action(struct dasd_ccw_req * cqr)
2761 struct dasd_ccw_req *erp = NULL;
2762 struct dasd_device *device = cqr->startdev;
2763 struct dasd_ccw_req *temp_erp = NULL;
2765 if (device->features & DASD_FEATURE_ERPLOG) {
2766 /* print current erp_chain */
2767 dev_err(&device->cdev->dev,
2768 "ERP chain at BEGINNING of ERP-ACTION\n");
2769 for (temp_erp = cqr;
2770 temp_erp != NULL; temp_erp = temp_erp->refers) {
2772 dev_err(&device->cdev->dev,
2773 "ERP %p (%02x) refers to %p\n",
2774 temp_erp, temp_erp->status,
2779 /* double-check if current erp/cqr was successful */
2780 if ((scsw_cstat(&cqr->irb.scsw) == 0x00) &&
2781 (scsw_dstat(&cqr->irb.scsw) ==
2782 (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) {
2784 DBF_DEV_EVENT(DBF_DEBUG, device,
2785 "ERP called for successful request %p"
2786 " - NO ERP necessary", cqr);
2788 cqr->status = DASD_CQR_DONE;
2793 /* check if error happened before */
2794 erp = dasd_3990_erp_in_erp(cqr);
2797 /* no matching erp found - set up erp */
2798 erp = dasd_3990_erp_additional_erp(cqr);
2802 /* matching erp found - set all leading erp's to DONE */
2803 erp = dasd_3990_erp_handle_match_erp(cqr, erp);
2806 if (device->features & DASD_FEATURE_ERPLOG) {
2807 /* print current erp_chain */
2808 dev_err(&device->cdev->dev,
2809 "ERP chain at END of ERP-ACTION\n");
2810 for (temp_erp = erp;
2811 temp_erp != NULL; temp_erp = temp_erp->refers) {
2813 dev_err(&device->cdev->dev,
2814 "ERP %p (%02x) refers to %p\n",
2815 temp_erp, temp_erp->status,
2820 /* enqueue ERP request if it's a new one */
2821 if (list_empty(&erp->blocklist)) {
2822 cqr->status = DASD_CQR_IN_ERP;
2823 /* add erp request before the cqr */
2824 list_add_tail(&erp->blocklist, &cqr->blocklist);
2831 } /* end dasd_3990_erp_action */