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
);
155 //FIXME: start with get_opm ?
157 erp
->lpm
= LPM_ANYPATH
& ~(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
->function
= dasd_3990_erp_DCTL
;
225 dctl_cqr
->refers
= erp
;
226 dctl_cqr
->startdev
= device
;
227 dctl_cqr
->memdev
= device
;
228 dctl_cqr
->magic
= erp
->magic
;
229 dctl_cqr
->expires
= 5 * 60 * HZ
;
230 dctl_cqr
->retries
= 2;
232 dctl_cqr
->buildclk
= get_clock();
234 dctl_cqr
->status
= DASD_CQR_FILLED
;
238 } /* end dasd_3990_erp_DCTL */
241 * DASD_3990_ERP_ACTION_1
244 * Setup ERP to do the ERP action 1 (see Reference manual).
245 * Repeat the operation on a different channel path.
246 * As deviation from the recommended recovery action, we reset the path mask
247 * after we have tried each path and go through all paths a second time.
248 * This will cover situations where only one path at a time is actually down,
249 * but all paths fail and recover just with the same sequence and timing as
250 * we try to use them (flapping links).
251 * If all alternate paths have been tried twice, the request is posted with
255 * erp pointer to the current ERP
258 * erp pointer to the ERP
261 static struct dasd_ccw_req
*dasd_3990_erp_action_1_sec(struct dasd_ccw_req
*erp
)
263 erp
->function
= dasd_3990_erp_action_1_sec
;
264 dasd_3990_erp_alternate_path(erp
);
268 static struct dasd_ccw_req
*dasd_3990_erp_action_1(struct dasd_ccw_req
*erp
)
270 erp
->function
= dasd_3990_erp_action_1
;
271 dasd_3990_erp_alternate_path(erp
);
272 if (erp
->status
== DASD_CQR_FAILED
) {
273 erp
->status
= DASD_CQR_FILLED
;
275 erp
->lpm
= LPM_ANYPATH
;
276 erp
->function
= dasd_3990_erp_action_1_sec
;
279 } /* end dasd_3990_erp_action_1(b) */
282 * DASD_3990_ERP_ACTION_4
285 * Setup ERP to do the ERP action 4 (see Reference manual).
286 * Set the current request to PENDING to block the CQR queue for that device
287 * until the state change interrupt appears.
288 * Use a timer (20 seconds) to retry the cqr if the interrupt is still
292 * sense sense data of the actual error
293 * erp pointer to the current ERP
296 * erp pointer to the ERP
299 static struct dasd_ccw_req
*
300 dasd_3990_erp_action_4(struct dasd_ccw_req
* erp
, char *sense
)
303 struct dasd_device
*device
= erp
->startdev
;
305 /* first time set initial retry counter and erp_function */
306 /* and retry once without waiting for state change pending */
307 /* interrupt (this enables easier enqueing of the cqr) */
308 if (erp
->function
!= dasd_3990_erp_action_4
) {
310 DBF_DEV_EVENT(DBF_INFO
, device
, "%s",
311 "dasd_3990_erp_action_4: first time retry");
314 erp
->function
= dasd_3990_erp_action_4
;
317 if (sense
&& (sense
[25] == 0x1D)) { /* state change pending */
319 DBF_DEV_EVENT(DBF_INFO
, device
,
320 "waiting for state change pending "
321 "interrupt, %d retries left",
324 dasd_3990_erp_block_queue(erp
, 30*HZ
);
326 } else if (sense
&& (sense
[25] == 0x1E)) { /* busy */
327 DBF_DEV_EVENT(DBF_INFO
, device
,
328 "busy - redriving request later, "
331 dasd_3990_erp_block_queue(erp
, HZ
);
333 /* no state change pending - retry */
334 DBF_DEV_EVENT(DBF_INFO
, device
,
335 "redriving request immediately, "
338 erp
->status
= DASD_CQR_FILLED
;
344 } /* end dasd_3990_erp_action_4 */
347 *****************************************************************************
348 * 24 byte sense ERP functions (only)
349 *****************************************************************************
353 * DASD_3990_ERP_ACTION_5
356 * Setup ERP to do the ERP action 5 (see Reference manual).
357 * NOTE: Further handling is done in xxx_further_erp after the retries.
360 * erp pointer to the current ERP
363 * erp pointer to the ERP
366 static struct dasd_ccw_req
*
367 dasd_3990_erp_action_5(struct dasd_ccw_req
* erp
)
370 /* first of all retry */
372 erp
->function
= dasd_3990_erp_action_5
;
376 } /* end dasd_3990_erp_action_5 */
379 * DASD_3990_HANDLE_ENV_DATA
382 * Handles 24 byte 'Environmental data present'.
383 * Does a analysis of the sense data (message Format)
384 * and prints the error messages.
387 * sense current sense data
393 dasd_3990_handle_env_data(struct dasd_ccw_req
* erp
, char *sense
)
396 struct dasd_device
*device
= erp
->startdev
;
397 char msg_format
= (sense
[7] & 0xF0);
398 char msg_no
= (sense
[7] & 0x0F);
399 char errorstring
[ERRORLENGTH
];
401 switch (msg_format
) {
402 case 0x00: /* Format 0 - Program or System Checks */
404 if (sense
[1] & 0x10) { /* check message to operator bit */
407 case 0x00: /* No Message */
410 dev_warn(&device
->cdev
->dev
,
411 "FORMAT 0 - Invalid Command\n");
414 dev_warn(&device
->cdev
->dev
,
415 "FORMAT 0 - Invalid Command "
419 dev_warn(&device
->cdev
->dev
,
420 "FORMAT 0 - CCW Count less than "
424 dev_warn(&device
->cdev
->dev
,
425 "FORMAT 0 - Invalid Parameter\n");
428 dev_warn(&device
->cdev
->dev
,
429 "FORMAT 0 - Diagnostic of Special"
430 " Command Violates File Mask\n");
433 dev_warn(&device
->cdev
->dev
,
434 "FORMAT 0 - Channel Returned with "
435 "Incorrect retry CCW\n");
438 dev_warn(&device
->cdev
->dev
,
439 "FORMAT 0 - Reset Notification\n");
442 dev_warn(&device
->cdev
->dev
,
443 "FORMAT 0 - Storage Path Restart\n");
446 dev_warn(&device
->cdev
->dev
,
447 "FORMAT 0 - Channel requested "
448 "... %02x\n", sense
[8]);
451 dev_warn(&device
->cdev
->dev
,
452 "FORMAT 0 - Invalid Defective/"
453 "Alternate Track Pointer\n");
456 dev_warn(&device
->cdev
->dev
,
457 "FORMAT 0 - DPS Installation "
461 dev_warn(&device
->cdev
->dev
,
462 "FORMAT 0 - Command Invalid on "
463 "Secondary Address\n");
466 dev_warn(&device
->cdev
->dev
,
467 "FORMAT 0 - Status Not As "
468 "Required: reason %02x\n",
472 dev_warn(&device
->cdev
->dev
,
473 "FORMAT 0 - Reserved\n");
477 case 0x00: /* No Message */
480 dev_warn(&device
->cdev
->dev
,
481 "FORMAT 0 - Device Error "
485 dev_warn(&device
->cdev
->dev
,
486 "FORMAT 0 - Reserved\n");
489 dev_warn(&device
->cdev
->dev
,
490 "FORMAT 0 - Device Fenced - "
491 "device = %02x\n", sense
[4]);
494 dev_warn(&device
->cdev
->dev
,
495 "FORMAT 0 - Data Pinned for "
499 dev_warn(&device
->cdev
->dev
,
500 "FORMAT 0 - Reserved\n");
505 case 0x10: /* Format 1 - Device Equipment Checks */
507 case 0x00: /* No Message */
510 dev_warn(&device
->cdev
->dev
,
511 "FORMAT 1 - Device Status 1 not as "
515 dev_warn(&device
->cdev
->dev
,
516 "FORMAT 1 - Index missing\n");
519 dev_warn(&device
->cdev
->dev
,
520 "FORMAT 1 - Interruption cannot be "
524 dev_warn(&device
->cdev
->dev
,
525 "FORMAT 1 - Device did not respond to "
529 dev_warn(&device
->cdev
->dev
,
530 "FORMAT 1 - Device check-2 error or Set "
531 "Sector is not complete\n");
534 dev_warn(&device
->cdev
->dev
,
535 "FORMAT 1 - Head address does not "
539 dev_warn(&device
->cdev
->dev
,
540 "FORMAT 1 - Device status 1 not valid\n");
543 dev_warn(&device
->cdev
->dev
,
544 "FORMAT 1 - Device not ready\n");
547 dev_warn(&device
->cdev
->dev
,
548 "FORMAT 1 - Track physical address did "
552 dev_warn(&device
->cdev
->dev
,
553 "FORMAT 1 - Missing device address bit\n");
556 dev_warn(&device
->cdev
->dev
,
557 "FORMAT 1 - Drive motor switch is off\n");
560 dev_warn(&device
->cdev
->dev
,
561 "FORMAT 1 - Seek incomplete\n");
564 dev_warn(&device
->cdev
->dev
,
565 "FORMAT 1 - Cylinder address did not "
569 dev_warn(&device
->cdev
->dev
,
570 "FORMAT 1 - Offset active cannot be "
574 dev_warn(&device
->cdev
->dev
,
575 "FORMAT 1 - Reserved\n");
579 case 0x20: /* Format 2 - 3990 Equipment Checks */
582 dev_warn(&device
->cdev
->dev
,
583 "FORMAT 2 - 3990 check-2 error\n");
586 dev_warn(&device
->cdev
->dev
,
587 "FORMAT 2 - Support facility errors\n");
590 dev_warn(&device
->cdev
->dev
,
591 "FORMAT 2 - Microcode detected error "
596 dev_warn(&device
->cdev
->dev
,
597 "FORMAT 2 - Reserved\n");
601 case 0x30: /* Format 3 - 3990 Control Checks */
604 dev_warn(&device
->cdev
->dev
,
605 "FORMAT 3 - Allegiance terminated\n");
608 dev_warn(&device
->cdev
->dev
,
609 "FORMAT 3 - Reserved\n");
613 case 0x40: /* Format 4 - Data Checks */
616 dev_warn(&device
->cdev
->dev
,
617 "FORMAT 4 - Home address area error\n");
620 dev_warn(&device
->cdev
->dev
,
621 "FORMAT 4 - Count area error\n");
624 dev_warn(&device
->cdev
->dev
,
625 "FORMAT 4 - Key area error\n");
628 dev_warn(&device
->cdev
->dev
,
629 "FORMAT 4 - Data area error\n");
632 dev_warn(&device
->cdev
->dev
,
633 "FORMAT 4 - No sync byte in home address "
637 dev_warn(&device
->cdev
->dev
,
638 "FORMAT 4 - No sync byte in count address "
642 dev_warn(&device
->cdev
->dev
,
643 "FORMAT 4 - No sync byte in key area\n");
646 dev_warn(&device
->cdev
->dev
,
647 "FORMAT 4 - No sync byte in data area\n");
650 dev_warn(&device
->cdev
->dev
,
651 "FORMAT 4 - Home address area error; "
655 dev_warn(&device
->cdev
->dev
,
656 "FORMAT 4 - Count area error; offset "
660 dev_warn(&device
->cdev
->dev
,
661 "FORMAT 4 - Key area error; offset "
665 dev_warn(&device
->cdev
->dev
,
666 "FORMAT 4 - Data area error; "
670 dev_warn(&device
->cdev
->dev
,
671 "FORMAT 4 - No sync byte in home "
672 "address area; offset active\n");
675 dev_warn(&device
->cdev
->dev
,
676 "FORMAT 4 - No syn byte in count "
677 "address area; offset active\n");
680 dev_warn(&device
->cdev
->dev
,
681 "FORMAT 4 - No sync byte in key area; "
685 dev_warn(&device
->cdev
->dev
,
686 "FORMAT 4 - No syn byte in data area; "
690 dev_warn(&device
->cdev
->dev
,
691 "FORMAT 4 - Reserved\n");
695 case 0x50: /* Format 5 - Data Check with displacement information */
698 dev_warn(&device
->cdev
->dev
,
699 "FORMAT 5 - Data Check in the "
700 "home address area\n");
703 dev_warn(&device
->cdev
->dev
,
704 "FORMAT 5 - Data Check in the count "
708 dev_warn(&device
->cdev
->dev
,
709 "FORMAT 5 - Data Check in the key area\n");
712 dev_warn(&device
->cdev
->dev
,
713 "FORMAT 5 - Data Check in the data "
717 dev_warn(&device
->cdev
->dev
,
718 "FORMAT 5 - Data Check in the "
719 "home address area; offset active\n");
722 dev_warn(&device
->cdev
->dev
,
723 "FORMAT 5 - Data Check in the count area; "
727 dev_warn(&device
->cdev
->dev
,
728 "FORMAT 5 - Data Check in the key area; "
732 dev_warn(&device
->cdev
->dev
,
733 "FORMAT 5 - Data Check in the data area; "
737 dev_warn(&device
->cdev
->dev
,
738 "FORMAT 5 - Reserved\n");
742 case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */
745 dev_warn(&device
->cdev
->dev
,
746 "FORMAT 6 - Overrun on channel A\n");
749 dev_warn(&device
->cdev
->dev
,
750 "FORMAT 6 - Overrun on channel B\n");
753 dev_warn(&device
->cdev
->dev
,
754 "FORMAT 6 - Overrun on channel C\n");
757 dev_warn(&device
->cdev
->dev
,
758 "FORMAT 6 - Overrun on channel D\n");
761 dev_warn(&device
->cdev
->dev
,
762 "FORMAT 6 - Overrun on channel E\n");
765 dev_warn(&device
->cdev
->dev
,
766 "FORMAT 6 - Overrun on channel F\n");
769 dev_warn(&device
->cdev
->dev
,
770 "FORMAT 6 - Overrun on channel G\n");
773 dev_warn(&device
->cdev
->dev
,
774 "FORMAT 6 - Overrun on channel H\n");
777 dev_warn(&device
->cdev
->dev
,
778 "FORMAT 6 - Reserved\n");
782 case 0x70: /* Format 7 - Device Connection Control Checks */
785 dev_warn(&device
->cdev
->dev
,
786 "FORMAT 7 - RCC initiated by a connection "
790 dev_warn(&device
->cdev
->dev
,
791 "FORMAT 7 - RCC 1 sequence not "
795 dev_warn(&device
->cdev
->dev
,
796 "FORMAT 7 - RCC 1 and RCC 2 sequences not "
800 dev_warn(&device
->cdev
->dev
,
801 "FORMAT 7 - Invalid tag-in during "
802 "selection sequence\n");
805 dev_warn(&device
->cdev
->dev
,
806 "FORMAT 7 - extra RCC required\n");
809 dev_warn(&device
->cdev
->dev
,
810 "FORMAT 7 - Invalid DCC selection "
811 "response or timeout\n");
814 dev_warn(&device
->cdev
->dev
,
815 "FORMAT 7 - Missing end operation; device "
816 "transfer complete\n");
819 dev_warn(&device
->cdev
->dev
,
820 "FORMAT 7 - Missing end operation; device "
821 "transfer incomplete\n");
824 dev_warn(&device
->cdev
->dev
,
825 "FORMAT 7 - Invalid tag-in for an "
826 "immediate command sequence\n");
829 dev_warn(&device
->cdev
->dev
,
830 "FORMAT 7 - Invalid tag-in for an "
831 "extended command sequence\n");
834 dev_warn(&device
->cdev
->dev
,
835 "FORMAT 7 - 3990 microcode time out when "
836 "stopping selection\n");
839 dev_warn(&device
->cdev
->dev
,
840 "FORMAT 7 - No response to selection "
841 "after a poll interruption\n");
844 dev_warn(&device
->cdev
->dev
,
845 "FORMAT 7 - Permanent path error (DASD "
846 "controller not available)\n");
849 dev_warn(&device
->cdev
->dev
,
850 "FORMAT 7 - DASD controller not available"
851 " on disconnected command chain\n");
854 dev_warn(&device
->cdev
->dev
,
855 "FORMAT 7 - Reserved\n");
859 case 0x80: /* Format 8 - Additional Device Equipment Checks */
861 case 0x00: /* No Message */
863 dev_warn(&device
->cdev
->dev
,
864 "FORMAT 8 - Error correction code "
868 dev_warn(&device
->cdev
->dev
,
869 "FORMAT 8 - Unexpected end operation "
873 dev_warn(&device
->cdev
->dev
,
874 "FORMAT 8 - End operation with transfer "
878 dev_warn(&device
->cdev
->dev
,
879 "FORMAT 8 - End operation with transfer "
883 dev_warn(&device
->cdev
->dev
,
884 "FORMAT 8 - DPS checks after a system "
885 "reset or selective reset\n");
888 dev_warn(&device
->cdev
->dev
,
889 "FORMAT 8 - DPS cannot be filled\n");
892 dev_warn(&device
->cdev
->dev
,
893 "FORMAT 8 - Short busy time-out during "
894 "device selection\n");
897 dev_warn(&device
->cdev
->dev
,
898 "FORMAT 8 - DASD controller failed to "
899 "set or reset the long busy latch\n");
902 dev_warn(&device
->cdev
->dev
,
903 "FORMAT 8 - No interruption from device "
904 "during a command chain\n");
907 dev_warn(&device
->cdev
->dev
,
908 "FORMAT 8 - Reserved\n");
912 case 0x90: /* Format 9 - Device Read, Write, and Seek Checks */
915 break; /* No Message */
917 dev_warn(&device
->cdev
->dev
,
918 "FORMAT 9 - Device check-2 error\n");
921 dev_warn(&device
->cdev
->dev
,
922 "FORMAT 9 - Head address did not "
926 dev_warn(&device
->cdev
->dev
,
927 "FORMAT 9 - Track physical address did "
928 "not compare while oriented\n");
931 dev_warn(&device
->cdev
->dev
,
932 "FORMAT 9 - Cylinder address did not "
936 dev_warn(&device
->cdev
->dev
,
937 "FORMAT 9 - Reserved\n");
941 case 0xF0: /* Format F - Cache Storage Checks */
944 dev_warn(&device
->cdev
->dev
,
945 "FORMAT F - Operation Terminated\n");
948 dev_warn(&device
->cdev
->dev
,
949 "FORMAT F - Subsystem Processing Error\n");
952 dev_warn(&device
->cdev
->dev
,
953 "FORMAT F - Cache or nonvolatile storage "
954 "equipment failure\n");
957 dev_warn(&device
->cdev
->dev
,
958 "FORMAT F - Caching terminated\n");
961 dev_warn(&device
->cdev
->dev
,
962 "FORMAT F - Cache fast write access not "
966 dev_warn(&device
->cdev
->dev
,
967 "FORMAT F - Track format incorrect\n");
970 dev_warn(&device
->cdev
->dev
,
971 "FORMAT F - Caching reinitiated\n");
974 dev_warn(&device
->cdev
->dev
,
975 "FORMAT F - Nonvolatile storage "
979 dev_warn(&device
->cdev
->dev
,
980 "FORMAT F - Volume is suspended duplex\n");
981 /* call extended error reporting (EER) */
982 dasd_eer_write(device
, erp
->refers
,
983 DASD_EER_PPRCSUSPEND
);
986 dev_warn(&device
->cdev
->dev
,
987 "FORMAT F - Subsystem status cannot be "
991 dev_warn(&device
->cdev
->dev
,
992 "FORMAT F - Caching status reset to "
996 dev_warn(&device
->cdev
->dev
,
997 "FORMAT F - DASD Fast Write inhibited\n");
1000 dev_warn(&device
->cdev
->dev
,
1001 "FORMAT D - Reserved\n");
1005 default: /* unknown message format - should not happen
1006 internal error 03 - unknown message format */
1007 snprintf(errorstring
, ERRORLENGTH
, "03 %x02", msg_format
);
1008 dev_err(&device
->cdev
->dev
,
1009 "An error occurred in the DASD device driver, "
1010 "reason=%s\n", errorstring
);
1012 } /* end switch message format */
1014 } /* end dasd_3990_handle_env_data */
1017 * DASD_3990_ERP_COM_REJ
1020 * Handles 24 byte 'Command Reject' error.
1023 * erp current erp_head
1024 * sense current sense data
1027 * erp 'new' erp_head - pointer to new ERP
1029 static struct dasd_ccw_req
*
1030 dasd_3990_erp_com_rej(struct dasd_ccw_req
* erp
, char *sense
)
1033 struct dasd_device
*device
= erp
->startdev
;
1035 erp
->function
= dasd_3990_erp_com_rej
;
1037 /* env data present (ACTION 10 - retry should work) */
1038 if (sense
[2] & SNS2_ENV_DATA_PRESENT
) {
1040 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1041 "Command Reject - environmental data present");
1043 dasd_3990_handle_env_data(erp
, sense
);
1047 } else if (sense
[1] & SNS1_WRITE_INHIBITED
) {
1048 dev_err(&device
->cdev
->dev
, "An I/O request was rejected"
1049 " because writing is inhibited\n");
1050 erp
= dasd_3990_erp_cleanup(erp
, DASD_CQR_FAILED
);
1052 /* fatal error - set status to FAILED
1053 internal error 09 - Command Reject */
1054 dev_err(&device
->cdev
->dev
, "An error occurred in the DASD "
1055 "device driver, reason=%s\n", "09");
1057 erp
= dasd_3990_erp_cleanup(erp
, DASD_CQR_FAILED
);
1062 } /* end dasd_3990_erp_com_rej */
1065 * DASD_3990_ERP_BUS_OUT
1068 * Handles 24 byte 'Bus Out Parity Check' error.
1071 * erp current erp_head
1073 * erp new erp_head - pointer to new ERP
1075 static struct dasd_ccw_req
*
1076 dasd_3990_erp_bus_out(struct dasd_ccw_req
* erp
)
1079 struct dasd_device
*device
= erp
->startdev
;
1081 /* first time set initial retry counter and erp_function */
1082 /* and retry once without blocking queue */
1083 /* (this enables easier enqueing of the cqr) */
1084 if (erp
->function
!= dasd_3990_erp_bus_out
) {
1086 erp
->function
= dasd_3990_erp_bus_out
;
1090 /* issue a message and wait for 'device ready' interrupt */
1091 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1092 "bus out parity error or BOPC requested by "
1095 dasd_3990_erp_block_queue(erp
, 60*HZ
);
1101 } /* end dasd_3990_erp_bus_out */
1104 * DASD_3990_ERP_EQUIP_CHECK
1107 * Handles 24 byte 'Equipment Check' error.
1110 * erp current erp_head
1112 * erp new erp_head - pointer to new ERP
1114 static struct dasd_ccw_req
*
1115 dasd_3990_erp_equip_check(struct dasd_ccw_req
* erp
, char *sense
)
1118 struct dasd_device
*device
= erp
->startdev
;
1120 erp
->function
= dasd_3990_erp_equip_check
;
1122 if (sense
[1] & SNS1_WRITE_INHIBITED
) {
1123 dev_info(&device
->cdev
->dev
,
1124 "Write inhibited path encountered\n");
1126 /* vary path offline
1127 internal error 04 - Path should be varied off-line.*/
1128 dev_err(&device
->cdev
->dev
, "An error occurred in the DASD "
1129 "device driver, reason=%s\n", "04");
1131 erp
= dasd_3990_erp_action_1(erp
);
1133 } else if (sense
[2] & SNS2_ENV_DATA_PRESENT
) {
1135 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1136 "Equipment Check - " "environmental data present");
1138 dasd_3990_handle_env_data(erp
, sense
);
1140 erp
= dasd_3990_erp_action_4(erp
, sense
);
1142 } else if (sense
[1] & SNS1_PERM_ERR
) {
1144 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1145 "Equipment Check - retry exhausted or "
1148 erp
= dasd_3990_erp_action_1(erp
);
1151 /* all other equipment checks - Action 5 */
1152 /* rest is done when retries == 0 */
1153 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1154 "Equipment check or processing error");
1156 erp
= dasd_3990_erp_action_5(erp
);
1160 } /* end dasd_3990_erp_equip_check */
1163 * DASD_3990_ERP_DATA_CHECK
1166 * Handles 24 byte 'Data Check' error.
1169 * erp current erp_head
1171 * erp new erp_head - pointer to new ERP
1173 static struct dasd_ccw_req
*
1174 dasd_3990_erp_data_check(struct dasd_ccw_req
* erp
, char *sense
)
1177 struct dasd_device
*device
= erp
->startdev
;
1179 erp
->function
= dasd_3990_erp_data_check
;
1181 if (sense
[2] & SNS2_CORRECTABLE
) { /* correctable data check */
1183 /* issue message that the data has been corrected */
1184 dev_emerg(&device
->cdev
->dev
,
1185 "Data recovered during retry with PCI "
1186 "fetch mode active\n");
1188 /* not possible to handle this situation in Linux */
1189 panic("No way to inform application about the possibly "
1192 } else if (sense
[2] & SNS2_ENV_DATA_PRESENT
) {
1194 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1195 "Uncorrectable data check recovered secondary "
1196 "addr of duplex pair");
1198 erp
= dasd_3990_erp_action_4(erp
, sense
);
1200 } else if (sense
[1] & SNS1_PERM_ERR
) {
1202 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1203 "Uncorrectable data check with internal "
1206 erp
= dasd_3990_erp_action_1(erp
);
1209 /* all other data checks */
1210 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1211 "Uncorrectable data check with retry count "
1214 erp
= dasd_3990_erp_action_5(erp
);
1219 } /* end dasd_3990_erp_data_check */
1222 * DASD_3990_ERP_OVERRUN
1225 * Handles 24 byte 'Overrun' error.
1228 * erp current erp_head
1230 * erp new erp_head - pointer to new ERP
1232 static struct dasd_ccw_req
*
1233 dasd_3990_erp_overrun(struct dasd_ccw_req
* erp
, char *sense
)
1236 struct dasd_device
*device
= erp
->startdev
;
1238 erp
->function
= dasd_3990_erp_overrun
;
1240 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1241 "Overrun - service overrun or overrun"
1242 " error requested by channel");
1244 erp
= dasd_3990_erp_action_5(erp
);
1248 } /* end dasd_3990_erp_overrun */
1251 * DASD_3990_ERP_INV_FORMAT
1254 * Handles 24 byte 'Invalid Track Format' error.
1257 * erp current erp_head
1259 * erp new erp_head - pointer to new ERP
1261 static struct dasd_ccw_req
*
1262 dasd_3990_erp_inv_format(struct dasd_ccw_req
* erp
, char *sense
)
1265 struct dasd_device
*device
= erp
->startdev
;
1267 erp
->function
= dasd_3990_erp_inv_format
;
1269 if (sense
[2] & SNS2_ENV_DATA_PRESENT
) {
1271 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1272 "Track format error when destaging or "
1275 dasd_3990_handle_env_data(erp
, sense
);
1277 erp
= dasd_3990_erp_action_4(erp
, sense
);
1280 /* internal error 06 - The track format is not valid*/
1281 dev_err(&device
->cdev
->dev
,
1282 "An error occurred in the DASD device driver, "
1283 "reason=%s\n", "06");
1285 erp
= dasd_3990_erp_cleanup(erp
, DASD_CQR_FAILED
);
1290 } /* end dasd_3990_erp_inv_format */
1296 * Handles 24 byte 'End-of-Cylinder' error.
1299 * erp already added default erp
1301 * erp pointer to original (failed) cqr.
1303 static struct dasd_ccw_req
*
1304 dasd_3990_erp_EOC(struct dasd_ccw_req
* default_erp
, char *sense
)
1307 struct dasd_device
*device
= default_erp
->startdev
;
1309 dev_err(&device
->cdev
->dev
,
1310 "The cylinder data for accessing the DASD is inconsistent\n");
1312 /* implement action 7 - BUG */
1313 return dasd_3990_erp_cleanup(default_erp
, DASD_CQR_FAILED
);
1315 } /* end dasd_3990_erp_EOC */
1318 * DASD_3990_ERP_ENV_DATA
1321 * Handles 24 byte 'Environmental-Data Present' error.
1324 * erp current erp_head
1326 * erp new erp_head - pointer to new ERP
1328 static struct dasd_ccw_req
*
1329 dasd_3990_erp_env_data(struct dasd_ccw_req
* erp
, char *sense
)
1332 struct dasd_device
*device
= erp
->startdev
;
1334 erp
->function
= dasd_3990_erp_env_data
;
1336 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s", "Environmental data present");
1338 dasd_3990_handle_env_data(erp
, sense
);
1340 /* don't retry on disabled interface */
1341 if (sense
[7] != 0x0F) {
1342 erp
= dasd_3990_erp_action_4(erp
, sense
);
1344 erp
->status
= DASD_CQR_FILLED
;
1349 } /* end dasd_3990_erp_env_data */
1352 * DASD_3990_ERP_NO_REC
1355 * Handles 24 byte 'No Record Found' error.
1358 * erp already added default ERP
1361 * erp new erp_head - pointer to new ERP
1363 static struct dasd_ccw_req
*
1364 dasd_3990_erp_no_rec(struct dasd_ccw_req
* default_erp
, char *sense
)
1367 struct dasd_device
*device
= default_erp
->startdev
;
1369 dev_err(&device
->cdev
->dev
,
1370 "The specified record was not found\n");
1372 return dasd_3990_erp_cleanup(default_erp
, DASD_CQR_FAILED
);
1374 } /* end dasd_3990_erp_no_rec */
1377 * DASD_3990_ERP_FILE_PROT
1380 * Handles 24 byte 'File Protected' error.
1381 * Note: Seek related recovery is not implemented because
1382 * wee don't use the seek command yet.
1385 * erp current erp_head
1387 * erp new erp_head - pointer to new ERP
1389 static struct dasd_ccw_req
*
1390 dasd_3990_erp_file_prot(struct dasd_ccw_req
* erp
)
1393 struct dasd_device
*device
= erp
->startdev
;
1395 dev_err(&device
->cdev
->dev
, "Accessing the DASD failed because of "
1396 "a hardware error\n");
1398 return dasd_3990_erp_cleanup(erp
, DASD_CQR_FAILED
);
1400 } /* end dasd_3990_erp_file_prot */
1403 * DASD_3990_ERP_INSPECT_ALIAS
1406 * Checks if the original request was started on an alias device.
1407 * If yes, it modifies the original and the erp request so that
1408 * the erp request can be started on a base device.
1411 * erp pointer to the currently created default ERP
1414 * erp pointer to the modified ERP, or NULL
1417 static struct dasd_ccw_req
*dasd_3990_erp_inspect_alias(
1418 struct dasd_ccw_req
*erp
)
1420 struct dasd_ccw_req
*cqr
= erp
->refers
;
1424 (cqr
->block
->base
!= cqr
->startdev
)) {
1426 sense
= dasd_get_sense(&erp
->refers
->irb
);
1428 * dynamic pav may have changed base alias mapping
1430 if (!test_bit(DASD_FLAG_OFFLINE
, &cqr
->startdev
->flags
) && sense
1431 && (sense
[0] == 0x10) && (sense
[7] == 0x0F)
1432 && (sense
[8] == 0x67)) {
1434 * remove device from alias handling to prevent new
1435 * requests from being scheduled on the
1436 * wrong alias device
1438 dasd_alias_remove_device(cqr
->startdev
);
1440 /* schedule worker to reload device */
1441 dasd_reload_device(cqr
->startdev
);
1444 if (cqr
->startdev
->features
& DASD_FEATURE_ERPLOG
) {
1445 DBF_DEV_EVENT(DBF_ERR
, cqr
->startdev
,
1446 "ERP on alias device for request %p,"
1447 " recover on base device %s", cqr
,
1448 dev_name(&cqr
->block
->base
->cdev
->dev
));
1450 dasd_eckd_reset_ccw_to_base_io(cqr
);
1451 erp
->startdev
= cqr
->block
->base
;
1452 erp
->function
= dasd_3990_erp_inspect_alias
;
1460 * DASD_3990_ERP_INSPECT_24
1463 * Does a detailed inspection of the 24 byte sense data
1464 * and sets up a related error recovery action.
1467 * sense sense data of the actual error
1468 * erp pointer to the currently created default ERP
1471 * erp pointer to the (addtitional) ERP
1473 static struct dasd_ccw_req
*
1474 dasd_3990_erp_inspect_24(struct dasd_ccw_req
* erp
, char *sense
)
1477 struct dasd_ccw_req
*erp_filled
= NULL
;
1479 /* Check sense for .... */
1480 /* 'Command Reject' */
1481 if ((erp_filled
== NULL
) && (sense
[0] & SNS0_CMD_REJECT
)) {
1482 erp_filled
= dasd_3990_erp_com_rej(erp
, sense
);
1484 /* 'Intervention Required' */
1485 if ((erp_filled
== NULL
) && (sense
[0] & SNS0_INTERVENTION_REQ
)) {
1486 erp_filled
= dasd_3990_erp_int_req(erp
);
1488 /* 'Bus Out Parity Check' */
1489 if ((erp_filled
== NULL
) && (sense
[0] & SNS0_BUS_OUT_CHECK
)) {
1490 erp_filled
= dasd_3990_erp_bus_out(erp
);
1492 /* 'Equipment Check' */
1493 if ((erp_filled
== NULL
) && (sense
[0] & SNS0_EQUIPMENT_CHECK
)) {
1494 erp_filled
= dasd_3990_erp_equip_check(erp
, sense
);
1497 if ((erp_filled
== NULL
) && (sense
[0] & SNS0_DATA_CHECK
)) {
1498 erp_filled
= dasd_3990_erp_data_check(erp
, sense
);
1501 if ((erp_filled
== NULL
) && (sense
[0] & SNS0_OVERRUN
)) {
1502 erp_filled
= dasd_3990_erp_overrun(erp
, sense
);
1504 /* 'Invalid Track Format' */
1505 if ((erp_filled
== NULL
) && (sense
[1] & SNS1_INV_TRACK_FORMAT
)) {
1506 erp_filled
= dasd_3990_erp_inv_format(erp
, sense
);
1508 /* 'End-of-Cylinder' */
1509 if ((erp_filled
== NULL
) && (sense
[1] & SNS1_EOC
)) {
1510 erp_filled
= dasd_3990_erp_EOC(erp
, sense
);
1512 /* 'Environmental Data' */
1513 if ((erp_filled
== NULL
) && (sense
[2] & SNS2_ENV_DATA_PRESENT
)) {
1514 erp_filled
= dasd_3990_erp_env_data(erp
, sense
);
1516 /* 'No Record Found' */
1517 if ((erp_filled
== NULL
) && (sense
[1] & SNS1_NO_REC_FOUND
)) {
1518 erp_filled
= dasd_3990_erp_no_rec(erp
, sense
);
1520 /* 'File Protected' */
1521 if ((erp_filled
== NULL
) && (sense
[1] & SNS1_FILE_PROTECTED
)) {
1522 erp_filled
= dasd_3990_erp_file_prot(erp
);
1524 /* other (unknown) error - do default ERP */
1525 if (erp_filled
== NULL
) {
1532 } /* END dasd_3990_erp_inspect_24 */
1535 *****************************************************************************
1536 * 32 byte sense ERP functions (only)
1537 *****************************************************************************
1541 * DASD_3990_ERPACTION_10_32
1544 * Handles 32 byte 'Action 10' of Single Program Action Codes.
1545 * Just retry and if retry doesn't work, return with error.
1548 * erp current erp_head
1549 * sense current sense data
1551 * erp modified erp_head
1553 static struct dasd_ccw_req
*
1554 dasd_3990_erp_action_10_32(struct dasd_ccw_req
* erp
, char *sense
)
1557 struct dasd_device
*device
= erp
->startdev
;
1560 erp
->function
= dasd_3990_erp_action_10_32
;
1562 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s", "Perform logging requested");
1566 } /* end dasd_3990_erp_action_10_32 */
1569 * DASD_3990_ERP_ACTION_1B_32
1572 * Handles 32 byte 'Action 1B' of Single Program Action Codes.
1573 * A write operation could not be finished because of an unexpected
1575 * The already created 'default erp' is used to get the link to
1576 * the erp chain, but it can not be used for this recovery
1577 * action because it contains no DE/LO data space.
1580 * default_erp already added default erp.
1581 * sense current sense data
1585 * default_erp in case of imprecise ending or error
1587 static struct dasd_ccw_req
*
1588 dasd_3990_erp_action_1B_32(struct dasd_ccw_req
* default_erp
, char *sense
)
1591 struct dasd_device
*device
= default_erp
->startdev
;
1593 struct dasd_ccw_req
*cqr
;
1594 struct dasd_ccw_req
*erp
;
1595 struct DE_eckd_data
*DE_data
;
1596 struct PFX_eckd_data
*PFX_data
;
1597 char *LO_data
; /* LO_eckd_data_t */
1598 struct ccw1
*ccw
, *oldccw
;
1600 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1601 "Write not finished because of unexpected condition");
1603 default_erp
->function
= dasd_3990_erp_action_1B_32
;
1605 /* determine the original cqr */
1608 while (cqr
->refers
!= NULL
) {
1612 if (scsw_is_tm(&cqr
->irb
.scsw
)) {
1613 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1614 "32 bit sense, action 1B is not defined"
1615 " in transport mode - just retry");
1619 /* for imprecise ending just do default erp */
1620 if (sense
[1] & 0x01) {
1621 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1622 "Imprecise ending is set - just retry");
1627 /* determine the address of the CCW to be restarted */
1628 /* Imprecise ending is not set -> addr from IRB-SCSW */
1629 cpa
= default_erp
->refers
->irb
.scsw
.cmd
.cpa
;
1632 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1633 "Unable to determine address of the CCW "
1636 return dasd_3990_erp_cleanup(default_erp
, DASD_CQR_FAILED
);
1639 /* Build new ERP request including DE/LO */
1640 erp
= dasd_alloc_erp_request((char *) &cqr
->magic
,
1641 2 + 1,/* DE/LO + TIC */
1642 sizeof(struct DE_eckd_data
) +
1643 sizeof(struct LO_eckd_data
), device
);
1646 /* internal error 01 - Unable to allocate ERP */
1647 dev_err(&device
->cdev
->dev
, "An error occurred in the DASD "
1648 "device driver, reason=%s\n", "01");
1649 return dasd_3990_erp_cleanup(default_erp
, DASD_CQR_FAILED
);
1652 /* use original DE */
1653 DE_data
= erp
->data
;
1654 oldccw
= cqr
->cpaddr
;
1655 if (oldccw
->cmd_code
== DASD_ECKD_CCW_PFX
) {
1656 PFX_data
= cqr
->data
;
1657 memcpy(DE_data
, &PFX_data
->define_extent
,
1658 sizeof(struct DE_eckd_data
));
1660 memcpy(DE_data
, cqr
->data
, sizeof(struct DE_eckd_data
));
1663 LO_data
= erp
->data
+ sizeof(struct DE_eckd_data
);
1665 if ((sense
[3] == 0x01) && (LO_data
[1] & 0x01)) {
1667 return dasd_3990_erp_cleanup(default_erp
, DASD_CQR_FAILED
);
1670 if ((sense
[7] & 0x3F) == 0x01) {
1671 /* operation code is WRITE DATA -> data area orientation */
1674 } else if ((sense
[7] & 0x3F) == 0x03) {
1675 /* operation code is FORMAT WRITE -> index orientation */
1679 LO_data
[0] = sense
[7]; /* operation */
1682 LO_data
[1] = sense
[8]; /* auxiliary */
1683 LO_data
[2] = sense
[9];
1684 LO_data
[3] = sense
[3]; /* count */
1685 LO_data
[4] = sense
[29]; /* seek_addr.cyl */
1686 LO_data
[5] = sense
[30]; /* seek_addr.cyl 2nd byte */
1687 LO_data
[7] = sense
[31]; /* seek_addr.head 2nd byte */
1689 memcpy(&(LO_data
[8]), &(sense
[11]), 8);
1693 memset(ccw
, 0, sizeof(struct ccw1
));
1694 ccw
->cmd_code
= DASD_ECKD_CCW_DEFINE_EXTENT
;
1695 ccw
->flags
= CCW_FLAG_CC
;
1697 ccw
->cda
= (__u32
)(addr_t
) DE_data
;
1701 memset(ccw
, 0, sizeof(struct ccw1
));
1702 ccw
->cmd_code
= DASD_ECKD_CCW_LOCATE_RECORD
;
1703 ccw
->flags
= CCW_FLAG_CC
;
1705 ccw
->cda
= (__u32
)(addr_t
) LO_data
;
1707 /* TIC to the failed ccw */
1709 ccw
->cmd_code
= CCW_CMD_TIC
;
1712 /* fill erp related fields */
1713 erp
->function
= dasd_3990_erp_action_1B_32
;
1714 erp
->refers
= default_erp
->refers
;
1715 erp
->startdev
= device
;
1716 erp
->memdev
= device
;
1717 erp
->magic
= default_erp
->magic
;
1720 erp
->buildclk
= get_clock();
1721 erp
->status
= DASD_CQR_FILLED
;
1723 /* remove the default erp */
1724 dasd_free_erp_request(default_erp
, device
);
1728 } /* end dasd_3990_erp_action_1B_32 */
1731 * DASD_3990_UPDATE_1B
1734 * Handles the update to the 32 byte 'Action 1B' of Single Program
1735 * Action Codes in case the first action was not successful.
1736 * The already created 'previous_erp' is the currently not successful
1740 * previous_erp already created previous erp.
1741 * sense current sense data
1745 static struct dasd_ccw_req
*
1746 dasd_3990_update_1B(struct dasd_ccw_req
* previous_erp
, char *sense
)
1749 struct dasd_device
*device
= previous_erp
->startdev
;
1751 struct dasd_ccw_req
*cqr
;
1752 struct dasd_ccw_req
*erp
;
1753 char *LO_data
; /* struct LO_eckd_data */
1756 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1757 "Write not finished because of unexpected condition"
1760 /* determine the original cqr */
1763 while (cqr
->refers
!= NULL
) {
1767 if (scsw_is_tm(&cqr
->irb
.scsw
)) {
1768 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1769 "32 bit sense, action 1B, update,"
1770 " in transport mode - just retry");
1771 return previous_erp
;
1774 /* for imprecise ending just do default erp */
1775 if (sense
[1] & 0x01) {
1776 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1777 "Imprecise ending is set - just retry");
1779 previous_erp
->status
= DASD_CQR_FILLED
;
1781 return previous_erp
;
1784 /* determine the address of the CCW to be restarted */
1785 /* Imprecise ending is not set -> addr from IRB-SCSW */
1786 cpa
= previous_erp
->irb
.scsw
.cmd
.cpa
;
1789 /* internal error 02 -
1790 Unable to determine address of the CCW to be restarted */
1791 dev_err(&device
->cdev
->dev
, "An error occurred in the DASD "
1792 "device driver, reason=%s\n", "02");
1794 previous_erp
->status
= DASD_CQR_FAILED
;
1796 return previous_erp
;
1801 /* update the LO with the new returned sense data */
1802 LO_data
= erp
->data
+ sizeof(struct DE_eckd_data
);
1804 if ((sense
[3] == 0x01) && (LO_data
[1] & 0x01)) {
1805 /* should not happen */
1806 previous_erp
->status
= DASD_CQR_FAILED
;
1808 return previous_erp
;
1811 if ((sense
[7] & 0x3F) == 0x01) {
1812 /* operation code is WRITE DATA -> data area orientation */
1815 } else if ((sense
[7] & 0x3F) == 0x03) {
1816 /* operation code is FORMAT WRITE -> index orientation */
1820 LO_data
[0] = sense
[7]; /* operation */
1823 LO_data
[1] = sense
[8]; /* auxiliary */
1824 LO_data
[2] = sense
[9];
1825 LO_data
[3] = sense
[3]; /* count */
1826 LO_data
[4] = sense
[29]; /* seek_addr.cyl */
1827 LO_data
[5] = sense
[30]; /* seek_addr.cyl 2nd byte */
1828 LO_data
[7] = sense
[31]; /* seek_addr.head 2nd byte */
1830 memcpy(&(LO_data
[8]), &(sense
[11]), 8);
1832 /* TIC to the failed ccw */
1833 ccw
= erp
->cpaddr
; /* addr of DE ccw */
1834 ccw
++; /* addr of LE ccw */
1835 ccw
++; /* addr of TIC ccw */
1838 erp
->status
= DASD_CQR_FILLED
;
1842 } /* end dasd_3990_update_1B */
1845 * DASD_3990_ERP_COMPOUND_RETRY
1848 * Handles the compound ERP action retry code.
1849 * NOTE: At least one retry is done even if zero is specified
1850 * by the sense data. This makes enqueueing of the request
1854 * sense sense data of the actual error
1855 * erp pointer to the currently created ERP
1858 * erp modified ERP pointer
1862 dasd_3990_erp_compound_retry(struct dasd_ccw_req
* erp
, char *sense
)
1865 switch (sense
[25] & 0x03) {
1866 case 0x00: /* no not retry */
1870 case 0x01: /* retry 2 times */
1874 case 0x02: /* retry 10 times */
1878 case 0x03: /* retry 256 times */
1886 erp
->function
= dasd_3990_erp_compound_retry
;
1888 } /* end dasd_3990_erp_compound_retry */
1891 * DASD_3990_ERP_COMPOUND_PATH
1894 * Handles the compound ERP action for retry on alternate
1898 * sense sense data of the actual error
1899 * erp pointer to the currently created ERP
1902 * erp modified ERP pointer
1906 dasd_3990_erp_compound_path(struct dasd_ccw_req
* erp
, char *sense
)
1909 if (sense
[25] & DASD_SENSE_BIT_3
) {
1910 dasd_3990_erp_alternate_path(erp
);
1912 if (erp
->status
== DASD_CQR_FAILED
) {
1913 /* reset the lpm and the status to be able to
1914 * try further actions. */
1917 erp
->status
= DASD_CQR_NEED_ERP
;
1921 erp
->function
= dasd_3990_erp_compound_path
;
1923 } /* end dasd_3990_erp_compound_path */
1926 * DASD_3990_ERP_COMPOUND_CODE
1929 * Handles the compound ERP action for retry code.
1932 * sense sense data of the actual error
1933 * erp pointer to the currently created ERP
1936 * erp NEW ERP pointer
1939 static struct dasd_ccw_req
*
1940 dasd_3990_erp_compound_code(struct dasd_ccw_req
* erp
, char *sense
)
1943 if (sense
[25] & DASD_SENSE_BIT_2
) {
1945 switch (sense
[28]) {
1947 /* issue a Diagnostic Control command with an
1948 * Inhibit Write subcommand and controller modifier */
1949 erp
= dasd_3990_erp_DCTL(erp
, 0x20);
1953 /* wait for 5 seconds and retry again */
1956 dasd_3990_erp_block_queue (erp
, 5*HZ
);
1960 /* should not happen - continue */
1965 erp
->function
= dasd_3990_erp_compound_code
;
1969 } /* end dasd_3990_erp_compound_code */
1972 * DASD_3990_ERP_COMPOUND_CONFIG
1975 * Handles the compound ERP action for configruation
1977 * Note: duplex handling is not implemented (yet).
1980 * sense sense data of the actual error
1981 * erp pointer to the currently created ERP
1984 * erp modified ERP pointer
1988 dasd_3990_erp_compound_config(struct dasd_ccw_req
* erp
, char *sense
)
1991 if ((sense
[25] & DASD_SENSE_BIT_1
) && (sense
[26] & DASD_SENSE_BIT_2
)) {
1993 /* set to suspended duplex state then restart
1994 internal error 05 - Set device to suspended duplex state
1996 struct dasd_device
*device
= erp
->startdev
;
1997 dev_err(&device
->cdev
->dev
,
1998 "An error occurred in the DASD device driver, "
1999 "reason=%s\n", "05");
2003 erp
->function
= dasd_3990_erp_compound_config
;
2005 } /* end dasd_3990_erp_compound_config */
2008 * DASD_3990_ERP_COMPOUND
2011 * Does the further compound program action if
2012 * compound retry was not successful.
2015 * sense sense data of the actual error
2016 * erp pointer to the current (failed) ERP
2019 * erp (additional) ERP pointer
2022 static struct dasd_ccw_req
*
2023 dasd_3990_erp_compound(struct dasd_ccw_req
* erp
, char *sense
)
2026 if ((erp
->function
== dasd_3990_erp_compound_retry
) &&
2027 (erp
->status
== DASD_CQR_NEED_ERP
)) {
2029 dasd_3990_erp_compound_path(erp
, sense
);
2032 if ((erp
->function
== dasd_3990_erp_compound_path
) &&
2033 (erp
->status
== DASD_CQR_NEED_ERP
)) {
2035 erp
= dasd_3990_erp_compound_code(erp
, sense
);
2038 if ((erp
->function
== dasd_3990_erp_compound_code
) &&
2039 (erp
->status
== DASD_CQR_NEED_ERP
)) {
2041 dasd_3990_erp_compound_config(erp
, sense
);
2044 /* if no compound action ERP specified, the request failed */
2045 if (erp
->status
== DASD_CQR_NEED_ERP
)
2046 erp
->status
= DASD_CQR_FAILED
;
2050 } /* end dasd_3990_erp_compound */
2053 *DASD_3990_ERP_HANDLE_SIM
2056 * inspects the SIM SENSE data and starts an appropriate action
2059 * sense sense data of the actual error
2065 dasd_3990_erp_handle_sim(struct dasd_device
*device
, char *sense
)
2067 /* print message according to log or message to operator mode */
2068 if ((sense
[24] & DASD_SIM_MSG_TO_OP
) || (sense
[1] & 0x10)) {
2069 /* print SIM SRC from RefCode */
2070 dev_err(&device
->cdev
->dev
, "SIM - SRC: "
2071 "%02x%02x%02x%02x\n", sense
[22],
2072 sense
[23], sense
[11], sense
[12]);
2073 } else if (sense
[24] & DASD_SIM_LOG
) {
2074 /* print SIM SRC Refcode */
2075 dev_warn(&device
->cdev
->dev
, "log SIM - SRC: "
2076 "%02x%02x%02x%02x\n", sense
[22],
2077 sense
[23], sense
[11], sense
[12]);
2082 * DASD_3990_ERP_INSPECT_32
2085 * Does a detailed inspection of the 32 byte sense data
2086 * and sets up a related error recovery action.
2089 * sense sense data of the actual error
2090 * erp pointer to the currently created default ERP
2093 * erp_filled pointer to the ERP
2096 static struct dasd_ccw_req
*
2097 dasd_3990_erp_inspect_32(struct dasd_ccw_req
* erp
, char *sense
)
2100 struct dasd_device
*device
= erp
->startdev
;
2102 erp
->function
= dasd_3990_erp_inspect_32
;
2104 /* check for SIM sense data */
2105 if ((sense
[6] & DASD_SIM_SENSE
) == DASD_SIM_SENSE
)
2106 dasd_3990_erp_handle_sim(device
, sense
);
2108 if (sense
[25] & DASD_SENSE_BIT_0
) {
2110 /* compound program action codes (byte25 bit 0 == '1') */
2111 dasd_3990_erp_compound_retry(erp
, sense
);
2115 /* single program action codes (byte25 bit 0 == '0') */
2116 switch (sense
[25]) {
2118 case 0x00: /* success - use default ERP for retries */
2119 DBF_DEV_EVENT(DBF_DEBUG
, device
, "%s",
2120 "ERP called for successful request"
2124 case 0x01: /* fatal error */
2125 dev_err(&device
->cdev
->dev
,
2126 "ERP failed for the DASD\n");
2128 erp
= dasd_3990_erp_cleanup(erp
, DASD_CQR_FAILED
);
2131 case 0x02: /* intervention required */
2132 case 0x03: /* intervention required during dual copy */
2133 erp
= dasd_3990_erp_int_req(erp
);
2136 case 0x0F: /* length mismatch during update write command
2137 internal error 08 - update write command error*/
2138 dev_err(&device
->cdev
->dev
, "An error occurred in the "
2139 "DASD device driver, reason=%s\n", "08");
2141 erp
= dasd_3990_erp_cleanup(erp
, DASD_CQR_FAILED
);
2144 case 0x10: /* logging required for other channel program */
2145 erp
= dasd_3990_erp_action_10_32(erp
, sense
);
2148 case 0x15: /* next track outside defined extend
2149 internal error 07 - The next track is not
2150 within the defined storage extent */
2151 dev_err(&device
->cdev
->dev
,
2152 "An error occurred in the DASD device driver, "
2153 "reason=%s\n", "07");
2155 erp
= dasd_3990_erp_cleanup(erp
, DASD_CQR_FAILED
);
2158 case 0x1B: /* unexpected condition during write */
2160 erp
= dasd_3990_erp_action_1B_32(erp
, sense
);
2163 case 0x1C: /* invalid data */
2164 dev_emerg(&device
->cdev
->dev
,
2165 "Data recovered during retry with PCI "
2166 "fetch mode active\n");
2168 /* not possible to handle this situation in Linux */
2170 ("Invalid data - No way to inform application "
2171 "about the possibly incorrect data");
2174 case 0x1D: /* state-change pending */
2175 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2176 "A State change pending condition exists "
2177 "for the subsystem or device");
2179 erp
= dasd_3990_erp_action_4(erp
, sense
);
2182 case 0x1E: /* busy */
2183 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2184 "Busy condition exists "
2185 "for the subsystem or device");
2186 erp
= dasd_3990_erp_action_4(erp
, sense
);
2189 default: /* all others errors - default erp */
2196 } /* end dasd_3990_erp_inspect_32 */
2199 *****************************************************************************
2200 * main ERP control fuctions (24 and 32 byte sense)
2201 *****************************************************************************
2205 * DASD_3990_ERP_CONTROL_CHECK
2208 * Does a generic inspection if a control check occured and sets up
2209 * the related error recovery procedure
2212 * erp pointer to the currently created default ERP
2215 * erp_filled pointer to the erp
2218 static struct dasd_ccw_req
*
2219 dasd_3990_erp_control_check(struct dasd_ccw_req
*erp
)
2221 struct dasd_device
*device
= erp
->startdev
;
2223 if (scsw_cstat(&erp
->refers
->irb
.scsw
) & (SCHN_STAT_INTF_CTRL_CHK
2224 | SCHN_STAT_CHN_CTRL_CHK
)) {
2225 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2226 "channel or interface control check");
2227 erp
= dasd_3990_erp_action_4(erp
, NULL
);
2233 * DASD_3990_ERP_INSPECT
2236 * Does a detailed inspection for sense data by calling either
2237 * the 24-byte or the 32-byte inspection routine.
2240 * erp pointer to the currently created default ERP
2242 * erp_new contens was possibly modified
2244 static struct dasd_ccw_req
*
2245 dasd_3990_erp_inspect(struct dasd_ccw_req
*erp
)
2248 struct dasd_ccw_req
*erp_new
= NULL
;
2251 /* if this problem occured on an alias retry on base */
2252 erp_new
= dasd_3990_erp_inspect_alias(erp
);
2256 /* sense data are located in the refers record of the
2257 * already set up new ERP !
2258 * check if concurrent sens is available
2260 sense
= dasd_get_sense(&erp
->refers
->irb
);
2262 erp_new
= dasd_3990_erp_control_check(erp
);
2263 /* distinguish between 24 and 32 byte sense data */
2264 else if (sense
[27] & DASD_SENSE_BIT_0
) {
2266 /* inspect the 24 byte sense data */
2267 erp_new
= dasd_3990_erp_inspect_24(erp
, sense
);
2271 /* inspect the 32 byte sense data */
2272 erp_new
= dasd_3990_erp_inspect_32(erp
, sense
);
2274 } /* end distinguish between 24 and 32 byte sense data */
2280 * DASD_3990_ERP_ADD_ERP
2283 * This funtion adds an additional request block (ERP) to the head of
2284 * the given cqr (or erp).
2285 * For a command mode cqr the erp is initialized as an default erp
2287 * For transport mode we make a copy of the original TCW (points to
2288 * the original TCCB, TIDALs, etc.) but give it a fresh
2289 * TSB so the original sense data will not be changed.
2292 * cqr head of the current ERP-chain (or single cqr if
2295 * erp pointer to new ERP-chain head
2297 static struct dasd_ccw_req
*dasd_3990_erp_add_erp(struct dasd_ccw_req
*cqr
)
2300 struct dasd_device
*device
= cqr
->startdev
;
2302 struct dasd_ccw_req
*erp
;
2303 int cplength
, datasize
;
2307 if (cqr
->cpmode
== 1) {
2309 /* TCW needs to be 64 byte aligned, so leave enough room */
2310 datasize
= 64 + sizeof(struct tcw
) + sizeof(struct tsb
);
2316 /* allocate additional request block */
2317 erp
= dasd_alloc_erp_request((char *) &cqr
->magic
,
2318 cplength
, datasize
, device
);
2320 if (cqr
->retries
<= 0) {
2321 DBF_DEV_EVENT(DBF_ERR
, device
, "%s",
2322 "Unable to allocate ERP request");
2323 cqr
->status
= DASD_CQR_FAILED
;
2324 cqr
->stopclk
= get_clock ();
2326 DBF_DEV_EVENT(DBF_ERR
, device
,
2327 "Unable to allocate ERP request "
2328 "(%i retries left)",
2330 dasd_block_set_timer(device
->block
, (HZ
<< 3));
2336 if (cqr
->cpmode
== 1) {
2337 /* make a shallow copy of the original tcw but set new tsb */
2339 erp
->cpaddr
= PTR_ALIGN(erp
->data
, 64);
2341 tsb
= (struct tsb
*) &tcw
[1];
2342 *tcw
= *((struct tcw
*)cqr
->cpaddr
);
2343 tcw
->tsb
= (long)tsb
;
2344 } else if (ccw
->cmd_code
== DASD_ECKD_CCW_PSF
) {
2345 /* PSF cannot be chained from NOOP/TIC */
2346 erp
->cpaddr
= cqr
->cpaddr
;
2348 /* initialize request with default TIC to current ERP/CQR */
2350 ccw
->cmd_code
= CCW_CMD_NOOP
;
2351 ccw
->flags
= CCW_FLAG_CC
;
2353 ccw
->cmd_code
= CCW_CMD_TIC
;
2354 ccw
->cda
= (long)(cqr
->cpaddr
);
2357 erp
->function
= dasd_3990_erp_add_erp
;
2359 erp
->startdev
= device
;
2360 erp
->memdev
= device
;
2361 erp
->block
= cqr
->block
;
2362 erp
->magic
= cqr
->magic
;
2365 erp
->buildclk
= get_clock();
2366 erp
->status
= DASD_CQR_FILLED
;
2372 * DASD_3990_ERP_ADDITIONAL_ERP
2375 * An additional ERP is needed to handle the current error.
2376 * Add ERP to the head of the ERP-chain containing the ERP processing
2377 * determined based on the sense data.
2380 * cqr head of the current ERP-chain (or single cqr if
2384 * erp pointer to new ERP-chain head
2386 static struct dasd_ccw_req
*
2387 dasd_3990_erp_additional_erp(struct dasd_ccw_req
* cqr
)
2390 struct dasd_ccw_req
*erp
= NULL
;
2392 /* add erp and initialize with default TIC */
2393 erp
= dasd_3990_erp_add_erp(cqr
);
2398 /* inspect sense, determine specific ERP if possible */
2401 erp
= dasd_3990_erp_inspect(erp
);
2406 } /* end dasd_3990_erp_additional_erp */
2409 * DASD_3990_ERP_ERROR_MATCH
2412 * Check if the device status of the given cqr is the same.
2413 * This means that the failed CCW and the relevant sense data
2415 * I don't distinguish between 24 and 32 byte sense because in case of
2416 * 24 byte sense byte 25 and 27 is set as well.
2419 * cqr1 first cqr, which will be compared with the
2423 * match 'boolean' for match found
2424 * returns 1 if match found, otherwise 0.
2426 static int dasd_3990_erp_error_match(struct dasd_ccw_req
*cqr1
,
2427 struct dasd_ccw_req
*cqr2
)
2429 char *sense1
, *sense2
;
2431 if (cqr1
->startdev
!= cqr2
->startdev
)
2434 sense1
= dasd_get_sense(&cqr1
->irb
);
2435 sense2
= dasd_get_sense(&cqr2
->irb
);
2437 /* one request has sense data, the other not -> no match, return 0 */
2438 if (!sense1
!= !sense2
)
2440 /* no sense data in both cases -> check cstat for IFCC */
2441 if (!sense1
&& !sense2
) {
2442 if ((scsw_cstat(&cqr1
->irb
.scsw
) & (SCHN_STAT_INTF_CTRL_CHK
|
2443 SCHN_STAT_CHN_CTRL_CHK
)) ==
2444 (scsw_cstat(&cqr2
->irb
.scsw
) & (SCHN_STAT_INTF_CTRL_CHK
|
2445 SCHN_STAT_CHN_CTRL_CHK
)))
2446 return 1; /* match with ifcc*/
2448 /* check sense data; byte 0-2,25,27 */
2449 if (!(sense1
&& sense2
&&
2450 (memcmp(sense1
, sense2
, 3) == 0) &&
2451 (sense1
[27] == sense2
[27]) &&
2452 (sense1
[25] == sense2
[25]))) {
2454 return 0; /* sense doesn't match */
2457 return 1; /* match */
2459 } /* end dasd_3990_erp_error_match */
2462 * DASD_3990_ERP_IN_ERP
2465 * check if the current error already happened before.
2466 * quick exit if current cqr is not an ERP (cqr->refers=NULL)
2469 * cqr failed cqr (either original cqr or already an erp)
2472 * erp erp-pointer to the already defined error
2473 * recovery procedure OR
2474 * NULL if a 'new' error occurred.
2476 static struct dasd_ccw_req
*
2477 dasd_3990_erp_in_erp(struct dasd_ccw_req
*cqr
)
2480 struct dasd_ccw_req
*erp_head
= cqr
, /* save erp chain head */
2481 *erp_match
= NULL
; /* save erp chain head */
2482 int match
= 0; /* 'boolean' for matching error found */
2484 if (cqr
->refers
== NULL
) { /* return if not in erp */
2488 /* check the erp/cqr chain for current error */
2490 match
= dasd_3990_erp_error_match(erp_head
, cqr
->refers
);
2491 erp_match
= cqr
; /* save possible matching erp */
2492 cqr
= cqr
->refers
; /* check next erp/cqr in queue */
2494 } while ((cqr
->refers
!= NULL
) && (!match
));
2497 return NULL
; /* no match was found */
2500 return erp_match
; /* return address of matching erp */
2502 } /* END dasd_3990_erp_in_erp */
2505 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense)
2508 * No retry is left for the current ERP. Check what has to be done
2510 * - do further defined ERP action or
2511 * - wait for interrupt or
2512 * - exit with permanent error
2515 * erp ERP which is in progress with no retry left
2518 * erp modified/additional ERP
2520 static struct dasd_ccw_req
*
2521 dasd_3990_erp_further_erp(struct dasd_ccw_req
*erp
)
2524 struct dasd_device
*device
= erp
->startdev
;
2525 char *sense
= dasd_get_sense(&erp
->irb
);
2527 /* check for 24 byte sense ERP */
2528 if ((erp
->function
== dasd_3990_erp_bus_out
) ||
2529 (erp
->function
== dasd_3990_erp_action_1
) ||
2530 (erp
->function
== dasd_3990_erp_action_4
)) {
2532 erp
= dasd_3990_erp_action_1(erp
);
2534 } else if (erp
->function
== dasd_3990_erp_action_1_sec
) {
2535 erp
= dasd_3990_erp_action_1_sec(erp
);
2536 } else if (erp
->function
== dasd_3990_erp_action_5
) {
2538 /* retries have not been successful */
2539 /* prepare erp for retry on different channel path */
2540 erp
= dasd_3990_erp_action_1(erp
);
2542 if (sense
&& !(sense
[2] & DASD_SENSE_BIT_0
)) {
2544 /* issue a Diagnostic Control command with an
2545 * Inhibit Write subcommand */
2547 switch (sense
[25]) {
2549 case 0x57:{ /* controller */
2550 erp
= dasd_3990_erp_DCTL(erp
, 0x20);
2554 case 0x58:{ /* channel path */
2555 erp
= dasd_3990_erp_DCTL(erp
, 0x40);
2559 case 0x59:{ /* storage director */
2560 erp
= dasd_3990_erp_DCTL(erp
, 0x80);
2564 DBF_DEV_EVENT(DBF_WARNING
, device
,
2565 "invalid subcommand modifier 0x%x "
2566 "for Diagnostic Control Command",
2571 /* check for 32 byte sense ERP */
2573 ((erp
->function
== dasd_3990_erp_compound_retry
) ||
2574 (erp
->function
== dasd_3990_erp_compound_path
) ||
2575 (erp
->function
== dasd_3990_erp_compound_code
) ||
2576 (erp
->function
== dasd_3990_erp_compound_config
))) {
2578 erp
= dasd_3990_erp_compound(erp
, sense
);
2582 * No retry left and no additional special handling
2585 dev_err(&device
->cdev
->dev
,
2586 "ERP %p has run out of retries and failed\n", erp
);
2588 erp
->status
= DASD_CQR_FAILED
;
2593 } /* end dasd_3990_erp_further_erp */
2596 * DASD_3990_ERP_HANDLE_MATCH_ERP
2599 * An error occurred again and an ERP has been detected which is already
2600 * used to handle this error (e.g. retries).
2601 * All prior ERP's are asumed to be successful and therefore removed
2603 * If retry counter of matching erp is already 0, it is checked if further
2604 * action is needed (besides retry) or if the ERP has failed.
2607 * erp_head first ERP in ERP-chain
2608 * erp ERP that handles the actual error.
2612 * erp modified/additional ERP
2614 static struct dasd_ccw_req
*
2615 dasd_3990_erp_handle_match_erp(struct dasd_ccw_req
*erp_head
,
2616 struct dasd_ccw_req
*erp
)
2619 struct dasd_device
*device
= erp_head
->startdev
;
2620 struct dasd_ccw_req
*erp_done
= erp_head
; /* finished req */
2621 struct dasd_ccw_req
*erp_free
= NULL
; /* req to be freed */
2623 /* loop over successful ERPs and remove them from chanq */
2624 while (erp_done
!= erp
) {
2626 if (erp_done
== NULL
) /* end of chain reached */
2627 panic(PRINTK_HEADER
"Programming error in ERP! The "
2628 "original request was lost\n");
2630 /* remove the request from the device queue */
2631 list_del(&erp_done
->blocklist
);
2633 erp_free
= erp_done
;
2634 erp_done
= erp_done
->refers
;
2636 /* free the finished erp request */
2637 dasd_free_erp_request(erp_free
, erp_free
->memdev
);
2641 if (erp
->retries
> 0) {
2643 char *sense
= dasd_get_sense(&erp
->refers
->irb
);
2645 /* check for special retries */
2646 if (sense
&& erp
->function
== dasd_3990_erp_action_4
) {
2648 erp
= dasd_3990_erp_action_4(erp
, sense
);
2651 erp
->function
== dasd_3990_erp_action_1B_32
) {
2653 erp
= dasd_3990_update_1B(erp
, sense
);
2655 } else if (sense
&& erp
->function
== dasd_3990_erp_int_req
) {
2657 erp
= dasd_3990_erp_int_req(erp
);
2661 DBF_DEV_EVENT(DBF_DEBUG
, device
,
2662 "%i retries left for erp %p",
2665 /* handle the request again... */
2666 erp
->status
= DASD_CQR_FILLED
;
2670 /* no retry left - check for further necessary action */
2671 /* if no further actions, handle rest as permanent error */
2672 erp
= dasd_3990_erp_further_erp(erp
);
2677 } /* end dasd_3990_erp_handle_match_erp */
2680 * DASD_3990_ERP_ACTION
2683 * control routine for 3990 erp actions.
2684 * Has to be called with the queue lock (namely the s390_irq_lock) acquired.
2687 * cqr failed cqr (either original cqr or already an erp)
2690 * erp erp-pointer to the head of the ERP action chain.
2692 * - either a ptr to an additional ERP cqr or
2693 * - the original given cqr (which's status might
2696 struct dasd_ccw_req
*
2697 dasd_3990_erp_action(struct dasd_ccw_req
* cqr
)
2699 struct dasd_ccw_req
*erp
= NULL
;
2700 struct dasd_device
*device
= cqr
->startdev
;
2701 struct dasd_ccw_req
*temp_erp
= NULL
;
2703 if (device
->features
& DASD_FEATURE_ERPLOG
) {
2704 /* print current erp_chain */
2705 dev_err(&device
->cdev
->dev
,
2706 "ERP chain at BEGINNING of ERP-ACTION\n");
2707 for (temp_erp
= cqr
;
2708 temp_erp
!= NULL
; temp_erp
= temp_erp
->refers
) {
2710 dev_err(&device
->cdev
->dev
,
2711 "ERP %p (%02x) refers to %p\n",
2712 temp_erp
, temp_erp
->status
,
2717 /* double-check if current erp/cqr was successful */
2718 if ((scsw_cstat(&cqr
->irb
.scsw
) == 0x00) &&
2719 (scsw_dstat(&cqr
->irb
.scsw
) ==
2720 (DEV_STAT_CHN_END
| DEV_STAT_DEV_END
))) {
2722 DBF_DEV_EVENT(DBF_DEBUG
, device
,
2723 "ERP called for successful request %p"
2724 " - NO ERP necessary", cqr
);
2726 cqr
->status
= DASD_CQR_DONE
;
2731 /* check if error happened before */
2732 erp
= dasd_3990_erp_in_erp(cqr
);
2735 /* no matching erp found - set up erp */
2736 erp
= dasd_3990_erp_additional_erp(cqr
);
2740 /* matching erp found - set all leading erp's to DONE */
2741 erp
= dasd_3990_erp_handle_match_erp(cqr
, erp
);
2744 if (device
->features
& DASD_FEATURE_ERPLOG
) {
2745 /* print current erp_chain */
2746 dev_err(&device
->cdev
->dev
,
2747 "ERP chain at END of ERP-ACTION\n");
2748 for (temp_erp
= erp
;
2749 temp_erp
!= NULL
; temp_erp
= temp_erp
->refers
) {
2751 dev_err(&device
->cdev
->dev
,
2752 "ERP %p (%02x) refers to %p\n",
2753 temp_erp
, temp_erp
->status
,
2758 /* enqueue ERP request if it's a new one */
2759 if (list_empty(&erp
->blocklist
)) {
2760 cqr
->status
= DASD_CQR_IN_ERP
;
2761 /* add erp request before the cqr */
2762 list_add_tail(&erp
->blocklist
, &cqr
->blocklist
);
2769 } /* end dasd_3990_erp_action */