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[S390] dasd: add dynamic pav toleration
[linux-2.6-block.git] / drivers / s390 / block / dasd_3990_erp.c
CommitLineData
138c014d 1/*
1da177e4 2 * File...........: linux/drivers/s390/block/dasd_3990_erp.c
138c014d 3 * Author(s)......: Horst Hummel <Horst.Hummel@de.ibm.com>
1da177e4
LT		 4 * Holger Smolinski <Holger.Smolinski@de.ibm.com>
5 * Bugreports.to..: <Linux390@de.ibm.com>
6 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000, 2001
7 *
1da177e4
LT		 8 */
9
ca99dab0 10#define KMSG_COMPONENT "dasd-eckd"
fc19f381 11
1da177e4 12#include <linux/timer.h>
1da177e4 13#include <asm/idals.h>
1da177e4
LT		 14
15#define PRINTK_HEADER "dasd_erp(3990): "
16
17#include "dasd_int.h"
18#include "dasd_eckd.h"
19
20
21struct DCTL_data {
22 unsigned char subcommand; /* e.g Inhibit Write, Enable Write,... */
23 unsigned char modifier; /* Subcommand modifier */
24 unsigned short res; /* reserved */
25} __attribute__ ((packed));
26
1da177e4 27/*
138c014d 28 *****************************************************************************
1da177e4 29 * SECTION ERP HANDLING
138c014d 30 *****************************************************************************
1da177e4
LT		 31 */
32/*
138c014d 33 *****************************************************************************
1da177e4 34 * 24 and 32 byte sense ERP functions
138c014d 35 *****************************************************************************
1da177e4
LT		 36 */
37
38/*
138c014d 39 * DASD_3990_ERP_CLEANUP
1da177e4
LT		 40 *
41 * DESCRIPTION
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
44 *
45 * PARAMETER
46 * erp request to be blocked
138c014d 47 * final_status either DASD_CQR_DONE or DASD_CQR_FAILED
1da177e4
LT		 48 *
49 * RETURN VALUES
138c014d 50 * cqr original cqr
1da177e4
LT		 51 */
52static struct dasd_ccw_req *
53dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status)
54{
55 struct dasd_ccw_req *cqr = erp->refers;
56
8e09f215 57 dasd_free_erp_request(erp, erp->memdev);
1da177e4
LT		 58 cqr->status = final_status;
59 return cqr;
60
61} /* end dasd_3990_erp_cleanup */
62
63/*
138c014d 64 * DASD_3990_ERP_BLOCK_QUEUE
1da177e4
LT		 65 *
66 * DESCRIPTION
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.
70 */
eb6e199b 71static void dasd_3990_erp_block_queue(struct dasd_ccw_req *erp, int expires)
1da177e4
LT		 72{
73
8e09f215
SW		 74 struct dasd_device *device = erp->startdev;
75 unsigned long flags;
1da177e4 76
fc19f381 77 DBF_DEV_EVENT(DBF_INFO, device,
1da177e4
LT		 78 "blocking request queue for %is", expires/HZ);
79
8e09f215 80 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
eb6e199b 81 dasd_device_set_stop_bits(device, DASD_STOPPED_PENDING);
8e09f215
SW		 82 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
83 erp->status = DASD_CQR_FILLED;
eb6e199b
SW		 84 if (erp->block)
85 dasd_block_set_timer(erp->block, expires);
86 else
87 dasd_device_set_timer(device, expires);
1da177e4
LT		 88}
89
90/*
138c014d 91 * DASD_3990_ERP_INT_REQ
1da177e4
LT		 92 *
93 * DESCRIPTION
94 * Handles 'Intervention Required' error.
95 * This means either device offline or not installed.
96 *
97 * PARAMETER
98 * erp current erp
99 * RETURN VALUES
100 * erp modified erp
101 */
102static struct dasd_ccw_req *
103dasd_3990_erp_int_req(struct dasd_ccw_req * erp)
104{
105
8e09f215 106 struct dasd_device *device = erp->startdev;
1da177e4
LT		 107
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) {
112
113 erp->retries = 256;
114 erp->function = dasd_3990_erp_int_req;
115
116 } else {
117
118 /* issue a message and wait for 'device ready' interrupt */
fc19f381 119 dev_err(&device->cdev->dev,
1da177e4 120 "is offline or not installed - "
fc19f381 121 "INTERVENTION REQUIRED!!\n");
1da177e4
LT		 122
123 dasd_3990_erp_block_queue(erp, 60*HZ);
124 }
125
126 return erp;
127
128} /* end dasd_3990_erp_int_req */
129
130/*
138c014d 131 * DASD_3990_ERP_ALTERNATE_PATH
1da177e4
LT		 132 *
133 * DESCRIPTION
134 * Repeat the operation on a different channel path.
135 * If all alternate paths have been tried, the request is posted with a
136 * permanent error.
137 *
138 * PARAMETER
139 * erp pointer to the current ERP
140 *
141 * RETURN VALUES
142 * erp modified pointer to the ERP
143 */
144static void
145dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp)
146{
8e09f215 147 struct dasd_device *device = erp->startdev;
1da177e4 148 __u8 opm;
8e09f215 149 unsigned long flags;
1da177e4
LT		 150
151 /* try alternate valid path */
8e09f215 152 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1da177e4 153 opm = ccw_device_get_path_mask(device->cdev);
8e09f215 154 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1da177e4
LT		 155 //FIXME: start with get_opm ?
156 if (erp->lpm == 0)
157 erp->lpm = LPM_ANYPATH & ~(erp->irb.esw.esw0.sublog.lpum);
158 else
159 erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum);
160
161 if ((erp->lpm & opm) != 0x00) {
162
fc19f381 163 DBF_DEV_EVENT(DBF_WARNING, device,
1da177e4
LT		 164 "try alternate lpm=%x (lpum=%x / opm=%x)",
165 erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm);
166
8e09f215
SW		 167 /* reset status to submit the request again... */
168 erp->status = DASD_CQR_FILLED;
6c5f57c7 169 erp->retries = 10;
1da177e4 170 } else {
fc19f381
SH		 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);
1da177e4
LT		 174
175 /* post request with permanent error */
8e09f215 176 erp->status = DASD_CQR_FAILED;
1da177e4
LT		 177 }
178} /* end dasd_3990_erp_alternate_path */
179
180/*
181 * DASD_3990_ERP_DCTL
182 *
183 * DESCRIPTION
138c014d 184 * Setup cqr to do the Diagnostic Control (DCTL) command with an
1da177e4
LT		 185 * Inhibit Write subcommand (0x20) and the given modifier.
186 *
187 * PARAMETER
188 * erp pointer to the current (failed) ERP
189 * modifier subcommand modifier
138c014d 190 *
1da177e4 191 * RETURN VALUES
138c014d 192 * dctl_cqr pointer to NEW dctl_cqr
1da177e4
LT		 193 *
194 */
195static struct dasd_ccw_req *
196dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier)
197{
198
8e09f215 199 struct dasd_device *device = erp->startdev;
1da177e4
LT		 200 struct DCTL_data *DCTL_data;
201 struct ccw1 *ccw;
202 struct dasd_ccw_req *dctl_cqr;
203
204 dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1,
8e09f215
SW		 205 sizeof(struct DCTL_data),
206 device);
1da177e4 207 if (IS_ERR(dctl_cqr)) {
fc19f381
SH		 208 dev_err(&device->cdev->dev,
209 "Unable to allocate DCTL-CQR\n");
1da177e4
LT		 210 erp->status = DASD_CQR_FAILED;
211 return erp;
212 }
213
214 DCTL_data = dctl_cqr->data;
215
216 DCTL_data->subcommand = 0x02; /* Inhibit Write */
217 DCTL_data->modifier = modifier;
218
219 ccw = dctl_cqr->cpaddr;
8e09f215 220 memset(ccw, 0, sizeof(struct ccw1));
1da177e4
LT		 221 ccw->cmd_code = CCW_CMD_DCTL;
222 ccw->count = 4;
223 ccw->cda = (__u32)(addr_t) DCTL_data;
224 dctl_cqr->function = dasd_3990_erp_DCTL;
225 dctl_cqr->refers = erp;
8e09f215
SW		 226 dctl_cqr->startdev = device;
227 dctl_cqr->memdev = device;
1da177e4
LT		 228 dctl_cqr->magic = erp->magic;
229 dctl_cqr->expires = 5 * 60 * HZ;
230 dctl_cqr->retries = 2;
231
232 dctl_cqr->buildclk = get_clock();
233
234 dctl_cqr->status = DASD_CQR_FILLED;
235
236 return dctl_cqr;
237
238} /* end dasd_3990_erp_DCTL */
239
240/*
138c014d 241 * DASD_3990_ERP_ACTION_1
1da177e4
LT		 242 *
243 * DESCRIPTION
244 * Setup ERP to do the ERP action 1 (see Reference manual).
245 * Repeat the operation on a different channel path.
eb6e199b
SW		 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
252 * a permanent error.
1da177e4
LT		 253 *
254 * PARAMETER
255 * erp pointer to the current ERP
256 *
257 * RETURN VALUES
258 * erp pointer to the ERP
259 *
260 */
eb6e199b 261static struct dasd_ccw_req *dasd_3990_erp_action_1_sec(struct dasd_ccw_req *erp)
1da177e4 262{
eb6e199b
SW		 263 erp->function = dasd_3990_erp_action_1_sec;
264 dasd_3990_erp_alternate_path(erp);
265 return erp;
266}
1da177e4 267
eb6e199b
SW		 268static struct dasd_ccw_req *dasd_3990_erp_action_1(struct dasd_ccw_req *erp)
269{
1da177e4 270 erp->function = dasd_3990_erp_action_1;
1da177e4 271 dasd_3990_erp_alternate_path(erp);
eb6e199b
SW		 272 if (erp->status == DASD_CQR_FAILED) {
273 erp->status = DASD_CQR_FILLED;
274 erp->retries = 10;
275 erp->lpm = LPM_ANYPATH;
276 erp->function = dasd_3990_erp_action_1_sec;
277 }
1da177e4 278 return erp;
eb6e199b 279} /* end dasd_3990_erp_action_1(b) */
1da177e4
LT		 280
281/*
138c014d 282 * DASD_3990_ERP_ACTION_4
1da177e4
LT		 283 *
284 * DESCRIPTION
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
289 * missing.
290 *
291 * PARAMETER
292 * sense sense data of the actual error
293 * erp pointer to the current ERP
294 *
295 * RETURN VALUES
296 * erp pointer to the ERP
297 *
298 */
299static struct dasd_ccw_req *
300dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense)
301{
302
8e09f215 303 struct dasd_device *device = erp->startdev;
1da177e4
LT		 304
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) {
309
fc19f381 310 DBF_DEV_EVENT(DBF_INFO, device, "%s",
1da177e4
LT		 311 "dasd_3990_erp_action_4: first time retry");
312
313 erp->retries = 256;
314 erp->function = dasd_3990_erp_action_4;
315
316 } else {
6c5f57c7 317 if (sense && (sense[25] == 0x1D)) { /* state change pending */
1da177e4 318
fc19f381 319 DBF_DEV_EVENT(DBF_INFO, device,
1da177e4
LT		 320 "waiting for state change pending "
321 "interrupt, %d retries left",
322 erp->retries);
138c014d 323
1da177e4
LT		 324 dasd_3990_erp_block_queue(erp, 30*HZ);
325
6c5f57c7 326 } else if (sense && (sense[25] == 0x1E)) { /* busy */
fc19f381 327 DBF_DEV_EVENT(DBF_INFO, device,
1da177e4
LT		 328 "busy - redriving request later, "
329 "%d retries left",
330 erp->retries);
331 dasd_3990_erp_block_queue(erp, HZ);
332 } else {
1da177e4 333 /* no state change pending - retry */
fc19f381 334 DBF_DEV_EVENT(DBF_INFO, device,
1da177e4 335 "redriving request immediately, "
138c014d 336 "%d retries left",
1da177e4 337 erp->retries);
8e09f215 338 erp->status = DASD_CQR_FILLED;
1da177e4
LT		 339 }
340 }
341
342 return erp;
343
344} /* end dasd_3990_erp_action_4 */
345
346/*
138c014d 347 *****************************************************************************
1da177e4 348 * 24 byte sense ERP functions (only)
138c014d 349 *****************************************************************************
1da177e4
LT		 350 */
351
352/*
138c014d 353 * DASD_3990_ERP_ACTION_5
1da177e4
LT		 354 *
355 * DESCRIPTION
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.
358 *
359 * PARAMETER
360 * erp pointer to the current ERP
361 *
362 * RETURN VALUES
363 * erp pointer to the ERP
364 *
365 */
366static struct dasd_ccw_req *
367dasd_3990_erp_action_5(struct dasd_ccw_req * erp)
368{
369
370 /* first of all retry */
371 erp->retries = 10;
372 erp->function = dasd_3990_erp_action_5;
373
374 return erp;
375
376} /* end dasd_3990_erp_action_5 */
377
378/*
379 * DASD_3990_HANDLE_ENV_DATA
380 *
381 * DESCRIPTION
382 * Handles 24 byte 'Environmental data present'.
383 * Does a analysis of the sense data (message Format)
384 * and prints the error messages.
385 *
386 * PARAMETER
387 * sense current sense data
138c014d 388 *
1da177e4
LT		 389 * RETURN VALUES
390 * void
391 */
392static void
393dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense)
394{
395
8e09f215 396 struct dasd_device *device = erp->startdev;
1da177e4
LT		 397 char msg_format = (sense[7] & 0xF0);
398 char msg_no = (sense[7] & 0x0F);
fc19f381 399 char errorstring[ERRORLENGTH];
1da177e4
LT		 400
401 switch (msg_format) {
402 case 0x00: /* Format 0 - Program or System Checks */
403
404 if (sense[1] & 0x10) { /* check message to operator bit */
405
406 switch (msg_no) {
407 case 0x00: /* No Message */
408 break;
409 case 0x01:
fc19f381
SH		 410 dev_warn(&device->cdev->dev,
411 "FORMAT 0 - Invalid Command\n");
1da177e4
LT		 412 break;
413 case 0x02:
fc19f381 414 dev_warn(&device->cdev->dev,
1da177e4 415 "FORMAT 0 - Invalid Command "
fc19f381 416 "Sequence\n");
1da177e4
LT		 417 break;
418 case 0x03:
fc19f381 419 dev_warn(&device->cdev->dev,
1da177e4 420 "FORMAT 0 - CCW Count less than "
fc19f381 421 "required\n");
1da177e4
LT		 422 break;
423 case 0x04:
fc19f381
SH		 424 dev_warn(&device->cdev->dev,
425 "FORMAT 0 - Invalid Parameter\n");
1da177e4
LT		 426 break;
427 case 0x05:
fc19f381
SH		 428 dev_warn(&device->cdev->dev,
429 "FORMAT 0 - Diagnostic of Special"
430 " Command Violates File Mask\n");
1da177e4
LT		 431 break;
432 case 0x07:
fc19f381 433 dev_warn(&device->cdev->dev,
1da177e4 434 "FORMAT 0 - Channel Returned with "
fc19f381 435 "Incorrect retry CCW\n");
1da177e4
LT		 436 break;
437 case 0x08:
fc19f381
SH		 438 dev_warn(&device->cdev->dev,
439 "FORMAT 0 - Reset Notification\n");
1da177e4
LT		 440 break;
441 case 0x09:
fc19f381
SH		 442 dev_warn(&device->cdev->dev,
443 "FORMAT 0 - Storage Path Restart\n");
1da177e4
LT		 444 break;
445 case 0x0A:
fc19f381 446 dev_warn(&device->cdev->dev,
1da177e4 447 "FORMAT 0 - Channel requested "
fc19f381 448 "... %02x\n", sense[8]);
1da177e4
LT		 449 break;
450 case 0x0B:
fc19f381 451 dev_warn(&device->cdev->dev,
1da177e4 452 "FORMAT 0 - Invalid Defective/"
fc19f381 453 "Alternate Track Pointer\n");
1da177e4
LT		 454 break;
455 case 0x0C:
fc19f381 456 dev_warn(&device->cdev->dev,
1da177e4 457 "FORMAT 0 - DPS Installation "
fc19f381 458 "Check\n");
1da177e4
LT		 459 break;
460 case 0x0E:
fc19f381 461 dev_warn(&device->cdev->dev,
1da177e4 462 "FORMAT 0 - Command Invalid on "
fc19f381 463 "Secondary Address\n");
1da177e4
LT		 464 break;
465 case 0x0F:
fc19f381 466 dev_warn(&device->cdev->dev,
1da177e4 467 "FORMAT 0 - Status Not As "
fc19f381
SH		 468 "Required: reason %02x\n",
469 sense[8]);
1da177e4
LT		 470 break;
471 default:
fc19f381
SH		 472 dev_warn(&device->cdev->dev,
473 "FORMAT 0 - Reserved\n");
1da177e4
LT		 474 }
475 } else {
476 switch (msg_no) {
477 case 0x00: /* No Message */
478 break;
479 case 0x01:
fc19f381
SH		 480 dev_warn(&device->cdev->dev,
481 "FORMAT 0 - Device Error "
482 "Source\n");
1da177e4
LT		 483 break;
484 case 0x02:
fc19f381
SH		 485 dev_warn(&device->cdev->dev,
486 "FORMAT 0 - Reserved\n");
1da177e4
LT		 487 break;
488 case 0x03:
fc19f381 489 dev_warn(&device->cdev->dev,
1da177e4 490 "FORMAT 0 - Device Fenced - "
fc19f381 491 "device = %02x\n", sense[4]);
1da177e4
LT		 492 break;
493 case 0x04:
fc19f381 494 dev_warn(&device->cdev->dev,
1da177e4 495 "FORMAT 0 - Data Pinned for "
fc19f381 496 "Device\n");
1da177e4
LT		 497 break;
498 default:
fc19f381
SH		 499 dev_warn(&device->cdev->dev,
500 "FORMAT 0 - Reserved\n");
1da177e4
LT		 501 }
502 }
503 break;
504
505 case 0x10: /* Format 1 - Device Equipment Checks */
506 switch (msg_no) {
507 case 0x00: /* No Message */
508 break;
509 case 0x01:
fc19f381 510 dev_warn(&device->cdev->dev,
1da177e4 511 "FORMAT 1 - Device Status 1 not as "
fc19f381 512 "expected\n");
1da177e4
LT		 513 break;
514 case 0x03:
fc19f381
SH		 515 dev_warn(&device->cdev->dev,
516 "FORMAT 1 - Index missing\n");
1da177e4
LT		 517 break;
518 case 0x04:
fc19f381
SH		 519 dev_warn(&device->cdev->dev,
520 "FORMAT 1 - Interruption cannot be "
521 "reset\n");
1da177e4
LT		 522 break;
523 case 0x05:
fc19f381 524 dev_warn(&device->cdev->dev,
1da177e4 525 "FORMAT 1 - Device did not respond to "
fc19f381 526 "selection\n");
1da177e4
LT		 527 break;
528 case 0x06:
fc19f381 529 dev_warn(&device->cdev->dev,
1da177e4 530 "FORMAT 1 - Device check-2 error or Set "
fc19f381 531 "Sector is not complete\n");
1da177e4
LT		 532 break;
533 case 0x07:
fc19f381 534 dev_warn(&device->cdev->dev,
1da177e4 535 "FORMAT 1 - Head address does not "
fc19f381 536 "compare\n");
1da177e4
LT		 537 break;
538 case 0x08:
fc19f381
SH		 539 dev_warn(&device->cdev->dev,
540 "FORMAT 1 - Device status 1 not valid\n");
1da177e4
LT		 541 break;
542 case 0x09:
fc19f381
SH		 543 dev_warn(&device->cdev->dev,
544 "FORMAT 1 - Device not ready\n");
1da177e4
LT		 545 break;
546 case 0x0A:
fc19f381 547 dev_warn(&device->cdev->dev,
1da177e4 548 "FORMAT 1 - Track physical address did "
fc19f381 549 "not compare\n");
1da177e4
LT		 550 break;
551 case 0x0B:
fc19f381
SH		 552 dev_warn(&device->cdev->dev,
553 "FORMAT 1 - Missing device address bit\n");
1da177e4
LT		 554 break;
555 case 0x0C:
fc19f381
SH		 556 dev_warn(&device->cdev->dev,
557 "FORMAT 1 - Drive motor switch is off\n");
1da177e4
LT		 558 break;
559 case 0x0D:
fc19f381
SH		 560 dev_warn(&device->cdev->dev,
561 "FORMAT 1 - Seek incomplete\n");
1da177e4
LT		 562 break;
563 case 0x0E:
fc19f381 564 dev_warn(&device->cdev->dev,
1da177e4 565 "FORMAT 1 - Cylinder address did not "
fc19f381 566 "compare\n");
1da177e4
LT		 567 break;
568 case 0x0F:
fc19f381 569 dev_warn(&device->cdev->dev,
1da177e4 570 "FORMAT 1 - Offset active cannot be "
fc19f381 571 "reset\n");
1da177e4
LT		 572 break;
573 default:
fc19f381
SH		 574 dev_warn(&device->cdev->dev,
575 "FORMAT 1 - Reserved\n");
1da177e4
LT		 576 }
577 break;
578
579 case 0x20: /* Format 2 - 3990 Equipment Checks */
580 switch (msg_no) {
581 case 0x08:
fc19f381
SH		 582 dev_warn(&device->cdev->dev,
583 "FORMAT 2 - 3990 check-2 error\n");
1da177e4
LT		 584 break;
585 case 0x0E:
fc19f381
SH		 586 dev_warn(&device->cdev->dev,
587 "FORMAT 2 - Support facility errors\n");
1da177e4
LT		 588 break;
589 case 0x0F:
fc19f381
SH		 590 dev_warn(&device->cdev->dev,
591 "FORMAT 2 - Microcode detected error "
592 "%02x\n",
593 sense[8]);
1da177e4
LT		 594 break;
595 default:
fc19f381
SH		 596 dev_warn(&device->cdev->dev,
597 "FORMAT 2 - Reserved\n");
1da177e4
LT		 598 }
599 break;
600
601 case 0x30: /* Format 3 - 3990 Control Checks */
602 switch (msg_no) {
603 case 0x0F:
fc19f381
SH		 604 dev_warn(&device->cdev->dev,
605 "FORMAT 3 - Allegiance terminated\n");
1da177e4
LT		 606 break;
607 default:
fc19f381
SH		 608 dev_warn(&device->cdev->dev,
609 "FORMAT 3 - Reserved\n");
1da177e4
LT		 610 }
611 break;
612
613 case 0x40: /* Format 4 - Data Checks */
614 switch (msg_no) {
615 case 0x00:
fc19f381
SH		 616 dev_warn(&device->cdev->dev,
617 "FORMAT 4 - Home address area error\n");
1da177e4
LT		 618 break;
619 case 0x01:
fc19f381
SH		 620 dev_warn(&device->cdev->dev,
621 "FORMAT 4 - Count area error\n");
1da177e4
LT		 622 break;
623 case 0x02:
fc19f381
SH		 624 dev_warn(&device->cdev->dev,
625 "FORMAT 4 - Key area error\n");
1da177e4
LT		 626 break;
627 case 0x03:
fc19f381
SH		 628 dev_warn(&device->cdev->dev,
629 "FORMAT 4 - Data area error\n");
1da177e4
LT		 630 break;
631 case 0x04:
fc19f381 632 dev_warn(&device->cdev->dev,
1da177e4 633 "FORMAT 4 - No sync byte in home address "
fc19f381 634 "area\n");
1da177e4
LT		 635 break;
636 case 0x05:
fc19f381 637 dev_warn(&device->cdev->dev,
1da177e4 638 "FORMAT 4 - No sync byte in count address "
fc19f381 639 "area\n");
1da177e4
LT		 640 break;
641 case 0x06:
fc19f381
SH		 642 dev_warn(&device->cdev->dev,
643 "FORMAT 4 - No sync byte in key area\n");
1da177e4
LT		 644 break;
645 case 0x07:
fc19f381
SH		 646 dev_warn(&device->cdev->dev,
647 "FORMAT 4 - No sync byte in data area\n");
1da177e4
LT		 648 break;
649 case 0x08:
fc19f381 650 dev_warn(&device->cdev->dev,
1da177e4 651 "FORMAT 4 - Home address area error; "
fc19f381 652 "offset active\n");
1da177e4
LT		 653 break;
654 case 0x09:
fc19f381 655 dev_warn(&device->cdev->dev,
1da177e4 656 "FORMAT 4 - Count area error; offset "
fc19f381 657 "active\n");
1da177e4
LT		 658 break;
659 case 0x0A:
fc19f381 660 dev_warn(&device->cdev->dev,
1da177e4 661 "FORMAT 4 - Key area error; offset "
fc19f381 662 "active\n");
1da177e4
LT		 663 break;
664 case 0x0B:
fc19f381 665 dev_warn(&device->cdev->dev,
1da177e4 666 "FORMAT 4 - Data area error; "
fc19f381 667 "offset active\n");
1da177e4
LT		 668 break;
669 case 0x0C:
fc19f381 670 dev_warn(&device->cdev->dev,
1da177e4 671 "FORMAT 4 - No sync byte in home "
fc19f381 672 "address area; offset active\n");
1da177e4
LT		 673 break;
674 case 0x0D:
fc19f381 675 dev_warn(&device->cdev->dev,
1da177e4 676 "FORMAT 4 - No syn byte in count "
fc19f381 677 "address area; offset active\n");
1da177e4
LT		 678 break;
679 case 0x0E:
fc19f381 680 dev_warn(&device->cdev->dev,
1da177e4 681 "FORMAT 4 - No sync byte in key area; "
fc19f381 682 "offset active\n");
1da177e4
LT		 683 break;
684 case 0x0F:
fc19f381 685 dev_warn(&device->cdev->dev,
1da177e4 686 "FORMAT 4 - No syn byte in data area; "
fc19f381 687 "offset active\n");
1da177e4
LT		 688 break;
689 default:
fc19f381
SH		 690 dev_warn(&device->cdev->dev,
691 "FORMAT 4 - Reserved\n");
1da177e4
LT		 692 }
693 break;
694
695 case 0x50: /* Format 5 - Data Check with displacement information */
696 switch (msg_no) {
697 case 0x00:
fc19f381 698 dev_warn(&device->cdev->dev,
1da177e4 699 "FORMAT 5 - Data Check in the "
fc19f381 700 "home address area\n");
1da177e4
LT		 701 break;
702 case 0x01:
fc19f381
SH		 703 dev_warn(&device->cdev->dev,
704 "FORMAT 5 - Data Check in the count "
705 "area\n");
1da177e4
LT		 706 break;
707 case 0x02:
fc19f381
SH		 708 dev_warn(&device->cdev->dev,
709 "FORMAT 5 - Data Check in the key area\n");
1da177e4
LT		 710 break;
711 case 0x03:
fc19f381
SH		 712 dev_warn(&device->cdev->dev,
713 "FORMAT 5 - Data Check in the data "
714 "area\n");
1da177e4
LT		 715 break;
716 case 0x08:
fc19f381 717 dev_warn(&device->cdev->dev,
1da177e4 718 "FORMAT 5 - Data Check in the "
fc19f381 719 "home address area; offset active\n");
1da177e4
LT		 720 break;
721 case 0x09:
fc19f381 722 dev_warn(&device->cdev->dev,
1da177e4 723 "FORMAT 5 - Data Check in the count area; "
fc19f381 724 "offset active\n");
1da177e4
LT		 725 break;
726 case 0x0A:
fc19f381 727 dev_warn(&device->cdev->dev,
1da177e4 728 "FORMAT 5 - Data Check in the key area; "
fc19f381 729 "offset active\n");
1da177e4
LT		 730 break;
731 case 0x0B:
fc19f381 732 dev_warn(&device->cdev->dev,
1da177e4 733 "FORMAT 5 - Data Check in the data area; "
fc19f381 734 "offset active\n");
1da177e4
LT		 735 break;
736 default:
fc19f381
SH		 737 dev_warn(&device->cdev->dev,
738 "FORMAT 5 - Reserved\n");
1da177e4
LT		 739 }
740 break;
741
742 case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */
743 switch (msg_no) {
744 case 0x00:
fc19f381
SH		 745 dev_warn(&device->cdev->dev,
746 "FORMAT 6 - Overrun on channel A\n");
1da177e4
LT		 747 break;
748 case 0x01:
fc19f381
SH		 749 dev_warn(&device->cdev->dev,
750 "FORMAT 6 - Overrun on channel B\n");
1da177e4
LT		 751 break;
752 case 0x02:
fc19f381
SH		 753 dev_warn(&device->cdev->dev,
754 "FORMAT 6 - Overrun on channel C\n");
1da177e4
LT		 755 break;
756 case 0x03:
fc19f381
SH		 757 dev_warn(&device->cdev->dev,
758 "FORMAT 6 - Overrun on channel D\n");
1da177e4
LT		 759 break;
760 case 0x04:
fc19f381
SH		 761 dev_warn(&device->cdev->dev,
762 "FORMAT 6 - Overrun on channel E\n");
1da177e4
LT		 763 break;
764 case 0x05:
fc19f381
SH		 765 dev_warn(&device->cdev->dev,
766 "FORMAT 6 - Overrun on channel F\n");
1da177e4
LT		 767 break;
768 case 0x06:
fc19f381
SH		 769 dev_warn(&device->cdev->dev,
770 "FORMAT 6 - Overrun on channel G\n");
1da177e4
LT		 771 break;
772 case 0x07:
fc19f381
SH		 773 dev_warn(&device->cdev->dev,
774 "FORMAT 6 - Overrun on channel H\n");
1da177e4
LT		 775 break;
776 default:
fc19f381
SH		 777 dev_warn(&device->cdev->dev,
778 "FORMAT 6 - Reserved\n");
1da177e4
LT		 779 }
780 break;
781
782 case 0x70: /* Format 7 - Device Connection Control Checks */
783 switch (msg_no) {
784 case 0x00:
fc19f381 785 dev_warn(&device->cdev->dev,
1da177e4 786 "FORMAT 7 - RCC initiated by a connection "
fc19f381 787 "check alert\n");
1da177e4
LT		 788 break;
789 case 0x01:
fc19f381 790 dev_warn(&device->cdev->dev,
1da177e4 791 "FORMAT 7 - RCC 1 sequence not "
fc19f381 792 "successful\n");
1da177e4
LT		 793 break;
794 case 0x02:
fc19f381 795 dev_warn(&device->cdev->dev,
1da177e4 796 "FORMAT 7 - RCC 1 and RCC 2 sequences not "
fc19f381 797 "successful\n");
1da177e4
LT		 798 break;
799 case 0x03:
fc19f381 800 dev_warn(&device->cdev->dev,
1da177e4 801 "FORMAT 7 - Invalid tag-in during "
fc19f381 802 "selection sequence\n");
1da177e4
LT		 803 break;
804 case 0x04:
fc19f381
SH		 805 dev_warn(&device->cdev->dev,
806 "FORMAT 7 - extra RCC required\n");
1da177e4
LT		 807 break;
808 case 0x05:
fc19f381 809 dev_warn(&device->cdev->dev,
1da177e4 810 "FORMAT 7 - Invalid DCC selection "
fc19f381 811 "response or timeout\n");
1da177e4
LT		 812 break;
813 case 0x06:
fc19f381 814 dev_warn(&device->cdev->dev,
1da177e4 815 "FORMAT 7 - Missing end operation; device "
fc19f381 816 "transfer complete\n");
1da177e4
LT		 817 break;
818 case 0x07:
fc19f381 819 dev_warn(&device->cdev->dev,
1da177e4 820 "FORMAT 7 - Missing end operation; device "
fc19f381 821 "transfer incomplete\n");
1da177e4
LT		 822 break;
823 case 0x08:
fc19f381 824 dev_warn(&device->cdev->dev,
1da177e4 825 "FORMAT 7 - Invalid tag-in for an "
fc19f381 826 "immediate command sequence\n");
1da177e4
LT		 827 break;
828 case 0x09:
fc19f381 829 dev_warn(&device->cdev->dev,
1da177e4 830 "FORMAT 7 - Invalid tag-in for an "
fc19f381 831 "extended command sequence\n");
1da177e4
LT		 832 break;
833 case 0x0A:
fc19f381 834 dev_warn(&device->cdev->dev,
1da177e4 835 "FORMAT 7 - 3990 microcode time out when "
fc19f381 836 "stopping selection\n");
1da177e4
LT		 837 break;
838 case 0x0B:
fc19f381 839 dev_warn(&device->cdev->dev,
1da177e4 840 "FORMAT 7 - No response to selection "
fc19f381 841 "after a poll interruption\n");
1da177e4
LT		 842 break;
843 case 0x0C:
fc19f381 844 dev_warn(&device->cdev->dev,
1da177e4 845 "FORMAT 7 - Permanent path error (DASD "
fc19f381 846 "controller not available)\n");
1da177e4
LT		 847 break;
848 case 0x0D:
fc19f381 849 dev_warn(&device->cdev->dev,
1da177e4 850 "FORMAT 7 - DASD controller not available"
fc19f381 851 " on disconnected command chain\n");
1da177e4
LT		 852 break;
853 default:
fc19f381
SH		 854 dev_warn(&device->cdev->dev,
855 "FORMAT 7 - Reserved\n");
1da177e4
LT		 856 }
857 break;
858
859 case 0x80: /* Format 8 - Additional Device Equipment Checks */
860 switch (msg_no) {
861 case 0x00: /* No Message */
862 case 0x01:
fc19f381 863 dev_warn(&device->cdev->dev,
1da177e4 864 "FORMAT 8 - Error correction code "
fc19f381 865 "hardware fault\n");
1da177e4
LT		 866 break;
867 case 0x03:
fc19f381 868 dev_warn(&device->cdev->dev,
1da177e4 869 "FORMAT 8 - Unexpected end operation "
fc19f381 870 "response code\n");
1da177e4
LT		 871 break;
872 case 0x04:
fc19f381 873 dev_warn(&device->cdev->dev,
1da177e4 874 "FORMAT 8 - End operation with transfer "
fc19f381 875 "count not zero\n");
1da177e4
LT		 876 break;
877 case 0x05:
fc19f381 878 dev_warn(&device->cdev->dev,
1da177e4 879 "FORMAT 8 - End operation with transfer "
fc19f381 880 "count zero\n");
1da177e4
LT		 881 break;
882 case 0x06:
fc19f381 883 dev_warn(&device->cdev->dev,
1da177e4 884 "FORMAT 8 - DPS checks after a system "
fc19f381 885 "reset or selective reset\n");
1da177e4
LT		 886 break;
887 case 0x07:
fc19f381
SH		 888 dev_warn(&device->cdev->dev,
889 "FORMAT 8 - DPS cannot be filled\n");
1da177e4
LT		 890 break;
891 case 0x08:
fc19f381 892 dev_warn(&device->cdev->dev,
1da177e4 893 "FORMAT 8 - Short busy time-out during "
fc19f381 894 "device selection\n");
1da177e4
LT		 895 break;
896 case 0x09:
fc19f381 897 dev_warn(&device->cdev->dev,
1da177e4 898 "FORMAT 8 - DASD controller failed to "
fc19f381 899 "set or reset the long busy latch\n");
1da177e4
LT		 900 break;
901 case 0x0A:
fc19f381 902 dev_warn(&device->cdev->dev,
1da177e4 903 "FORMAT 8 - No interruption from device "
fc19f381 904 "during a command chain\n");
1da177e4
LT		 905 break;
906 default:
fc19f381
SH		 907 dev_warn(&device->cdev->dev,
908 "FORMAT 8 - Reserved\n");
1da177e4
LT		 909 }
910 break;
911
912 case 0x90: /* Format 9 - Device Read, Write, and Seek Checks */
913 switch (msg_no) {
914 case 0x00:
915 break; /* No Message */
916 case 0x06:
fc19f381
SH		 917 dev_warn(&device->cdev->dev,
918 "FORMAT 9 - Device check-2 error\n");
1da177e4
LT		 919 break;
920 case 0x07:
fc19f381
SH		 921 dev_warn(&device->cdev->dev,
922 "FORMAT 9 - Head address did not "
923 "compare\n");
1da177e4
LT		 924 break;
925 case 0x0A:
fc19f381 926 dev_warn(&device->cdev->dev,
1da177e4 927 "FORMAT 9 - Track physical address did "
fc19f381 928 "not compare while oriented\n");
1da177e4
LT		 929 break;
930 case 0x0E:
fc19f381 931 dev_warn(&device->cdev->dev,
1da177e4 932 "FORMAT 9 - Cylinder address did not "
fc19f381 933 "compare\n");
1da177e4
LT		 934 break;
935 default:
fc19f381
SH		 936 dev_warn(&device->cdev->dev,
937 "FORMAT 9 - Reserved\n");
1da177e4
LT		 938 }
939 break;
940
941 case 0xF0: /* Format F - Cache Storage Checks */
942 switch (msg_no) {
943 case 0x00:
fc19f381
SH		 944 dev_warn(&device->cdev->dev,
945 "FORMAT F - Operation Terminated\n");
1da177e4
LT		 946 break;
947 case 0x01:
fc19f381
SH		 948 dev_warn(&device->cdev->dev,
949 "FORMAT F - Subsystem Processing Error\n");
1da177e4
LT		 950 break;
951 case 0x02:
fc19f381 952 dev_warn(&device->cdev->dev,
1da177e4 953 "FORMAT F - Cache or nonvolatile storage "
fc19f381 954 "equipment failure\n");
1da177e4
LT		 955 break;
956 case 0x04:
fc19f381
SH		 957 dev_warn(&device->cdev->dev,
958 "FORMAT F - Caching terminated\n");
1da177e4
LT		 959 break;
960 case 0x06:
fc19f381 961 dev_warn(&device->cdev->dev,
1da177e4 962 "FORMAT F - Cache fast write access not "
fc19f381 963 "authorized\n");
1da177e4
LT		 964 break;
965 case 0x07:
fc19f381
SH		 966 dev_warn(&device->cdev->dev,
967 "FORMAT F - Track format incorrect\n");
1da177e4
LT		 968 break;
969 case 0x09:
fc19f381
SH		 970 dev_warn(&device->cdev->dev,
971 "FORMAT F - Caching reinitiated\n");
1da177e4
LT		 972 break;
973 case 0x0A:
fc19f381 974 dev_warn(&device->cdev->dev,
1da177e4 975 "FORMAT F - Nonvolatile storage "
fc19f381 976 "terminated\n");
1da177e4
LT		 977 break;
978 case 0x0B:
fc19f381
SH		 979 dev_warn(&device->cdev->dev,
980 "FORMAT F - Volume is suspended duplex\n");
20c64468
SW		 981 /* call extended error reporting (EER) */
982 dasd_eer_write(device, erp->refers,
983 DASD_EER_PPRCSUSPEND);
1da177e4
LT		 984 break;
985 case 0x0C:
fc19f381
SH		 986 dev_warn(&device->cdev->dev,
987 "FORMAT F - Subsystem status cannot be "
988 "determined\n");
1da177e4
LT		 989 break;
990 case 0x0D:
fc19f381 991 dev_warn(&device->cdev->dev,
1da177e4 992 "FORMAT F - Caching status reset to "
fc19f381 993 "default\n");
1da177e4
LT		 994 break;
995 case 0x0E:
fc19f381
SH		 996 dev_warn(&device->cdev->dev,
997 "FORMAT F - DASD Fast Write inhibited\n");
1da177e4
LT		 998 break;
999 default:
fc19f381
SH		 1000 dev_warn(&device->cdev->dev,
1001 "FORMAT D - Reserved\n");
1da177e4
LT		 1002 }
1003 break;
1004
fc19f381
SH		 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);
1da177e4
LT		 1011 break;
1012 } /* end switch message format */
1013
1014} /* end dasd_3990_handle_env_data */
1015
1016/*
1017 * DASD_3990_ERP_COM_REJ
1018 *
1019 * DESCRIPTION
1020 * Handles 24 byte 'Command Reject' error.
1021 *
1022 * PARAMETER
1023 * erp current erp_head
1024 * sense current sense data
138c014d 1025 *
1da177e4 1026 * RETURN VALUES
138c014d 1027 * erp 'new' erp_head - pointer to new ERP
1da177e4
LT		 1028 */
1029static struct dasd_ccw_req *
1030dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense)
1031{
1032
8e09f215 1033 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1034
1035 erp->function = dasd_3990_erp_com_rej;
1036
1037 /* env data present (ACTION 10 - retry should work) */
1038 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1039
fc19f381 1040 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1041 "Command Reject - environmental data present");
1042
1043 dasd_3990_handle_env_data(erp, sense);
1044
1045 erp->retries = 5;
1046
33b62a30
SW		 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);
1da177e4 1051 } else {
fc19f381
SH		 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");
1da177e4
LT		 1056
1057 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1058 }
1059
1060 return erp;
1061
1062} /* end dasd_3990_erp_com_rej */
1063
1064/*
138c014d 1065 * DASD_3990_ERP_BUS_OUT
1da177e4
LT		 1066 *
1067 * DESCRIPTION
1068 * Handles 24 byte 'Bus Out Parity Check' error.
1069 *
1070 * PARAMETER
1071 * erp current erp_head
1072 * RETURN VALUES
1073 * erp new erp_head - pointer to new ERP
1074 */
1075static struct dasd_ccw_req *
1076dasd_3990_erp_bus_out(struct dasd_ccw_req * erp)
1077{
1078
8e09f215 1079 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1080
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) {
1085 erp->retries = 256;
1086 erp->function = dasd_3990_erp_bus_out;
1087
1088 } else {
1089
1090 /* issue a message and wait for 'device ready' interrupt */
fc19f381 1091 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1092 "bus out parity error or BOPC requested by "
1093 "channel");
1094
1095 dasd_3990_erp_block_queue(erp, 60*HZ);
1096
1097 }
1098
1099 return erp;
1100
1101} /* end dasd_3990_erp_bus_out */
1102
1103/*
1104 * DASD_3990_ERP_EQUIP_CHECK
1105 *
1106 * DESCRIPTION
1107 * Handles 24 byte 'Equipment Check' error.
1108 *
1109 * PARAMETER
1110 * erp current erp_head
1111 * RETURN VALUES
1112 * erp new erp_head - pointer to new ERP
1113 */
1114static struct dasd_ccw_req *
1115dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense)
1116{
1117
8e09f215 1118 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1119
1120 erp->function = dasd_3990_erp_equip_check;
1121
1122 if (sense[1] & SNS1_WRITE_INHIBITED) {
fc19f381
SH		 1123 dev_info(&device->cdev->dev,
1124 "Write inhibited path encountered\n");
1da177e4 1125
fc19f381
SH		 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");
1da177e4
LT		 1130
1131 erp = dasd_3990_erp_action_1(erp);
1132
1133 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1134
fc19f381 1135 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1136 "Equipment Check - " "environmental data present");
1137
1138 dasd_3990_handle_env_data(erp, sense);
1139
1140 erp = dasd_3990_erp_action_4(erp, sense);
1141
1142 } else if (sense[1] & SNS1_PERM_ERR) {
1143
fc19f381 1144 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1145 "Equipment Check - retry exhausted or "
1146 "undesirable");
1147
1148 erp = dasd_3990_erp_action_1(erp);
1149
1150 } else {
1151 /* all other equipment checks - Action 5 */
1152 /* rest is done when retries == 0 */
fc19f381 1153 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1154 "Equipment check or processing error");
1155
1156 erp = dasd_3990_erp_action_5(erp);
1157 }
1da177e4
LT		 1158 return erp;
1159
1160} /* end dasd_3990_erp_equip_check */
1161
1162/*
1163 * DASD_3990_ERP_DATA_CHECK
1164 *
1165 * DESCRIPTION
1166 * Handles 24 byte 'Data Check' error.
1167 *
1168 * PARAMETER
1169 * erp current erp_head
1170 * RETURN VALUES
1171 * erp new erp_head - pointer to new ERP
1172 */
1173static struct dasd_ccw_req *
1174dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense)
1175{
1176
8e09f215 1177 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1178
1179 erp->function = dasd_3990_erp_data_check;
1180
1181 if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */
1182
1183 /* issue message that the data has been corrected */
fc19f381 1184 dev_emerg(&device->cdev->dev,
1da177e4 1185 "Data recovered during retry with PCI "
fc19f381 1186 "fetch mode active\n");
1da177e4
LT		 1187
1188 /* not possible to handle this situation in Linux */
1189 panic("No way to inform application about the possibly "
1190 "incorrect data");
1191
1192 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1193
fc19f381 1194 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1195 "Uncorrectable data check recovered secondary "
1196 "addr of duplex pair");
1197
1198 erp = dasd_3990_erp_action_4(erp, sense);
1199
1200 } else if (sense[1] & SNS1_PERM_ERR) {
1201
fc19f381 1202 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1203 "Uncorrectable data check with internal "
1204 "retry exhausted");
1205
1206 erp = dasd_3990_erp_action_1(erp);
1207
1208 } else {
1209 /* all other data checks */
fc19f381 1210 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1211 "Uncorrectable data check with retry count "
1212 "exhausted...");
1213
1214 erp = dasd_3990_erp_action_5(erp);
1215 }
1216
1217 return erp;
1218
1219} /* end dasd_3990_erp_data_check */
1220
1221/*
1222 * DASD_3990_ERP_OVERRUN
1223 *
1224 * DESCRIPTION
1225 * Handles 24 byte 'Overrun' error.
1226 *
1227 * PARAMETER
1228 * erp current erp_head
1229 * RETURN VALUES
1230 * erp new erp_head - pointer to new ERP
1231 */
1232static struct dasd_ccw_req *
1233dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense)
1234{
1235
8e09f215 1236 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1237
1238 erp->function = dasd_3990_erp_overrun;
1239
fc19f381 1240 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1241 "Overrun - service overrun or overrun"
1242 " error requested by channel");
1243
1244 erp = dasd_3990_erp_action_5(erp);
1245
1246 return erp;
1247
1248} /* end dasd_3990_erp_overrun */
1249
1250/*
1251 * DASD_3990_ERP_INV_FORMAT
1252 *
1253 * DESCRIPTION
1254 * Handles 24 byte 'Invalid Track Format' error.
1255 *
1256 * PARAMETER
1257 * erp current erp_head
1258 * RETURN VALUES
1259 * erp new erp_head - pointer to new ERP
1260 */
1261static struct dasd_ccw_req *
1262dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense)
1263{
1264
8e09f215 1265 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1266
1267 erp->function = dasd_3990_erp_inv_format;
1268
1269 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1270
fc19f381 1271 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1272 "Track format error when destaging or "
1273 "staging data");
1274
1275 dasd_3990_handle_env_data(erp, sense);
1276
1277 erp = dasd_3990_erp_action_4(erp, sense);
1278
1279 } else {
fc19f381
SH		 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");
1da177e4
LT		 1284
1285 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1286 }
1287
1288 return erp;
1289
1290} /* end dasd_3990_erp_inv_format */
1291
1292/*
1293 * DASD_3990_ERP_EOC
1294 *
1295 * DESCRIPTION
1296 * Handles 24 byte 'End-of-Cylinder' error.
1297 *
1298 * PARAMETER
1299 * erp already added default erp
1300 * RETURN VALUES
1301 * erp pointer to original (failed) cqr.
1302 */
1303static struct dasd_ccw_req *
1304dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense)
1305{
1306
8e09f215 1307 struct dasd_device *device = default_erp->startdev;
1da177e4 1308
fc19f381
SH		 1309 dev_err(&device->cdev->dev,
1310 "The cylinder data for accessing the DASD is inconsistent\n");
1da177e4
LT		 1311
1312 /* implement action 7 - BUG */
1313 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1314
1315} /* end dasd_3990_erp_EOC */
1316
1317/*
1318 * DASD_3990_ERP_ENV_DATA
1319 *
1320 * DESCRIPTION
1321 * Handles 24 byte 'Environmental-Data Present' error.
1322 *
1323 * PARAMETER
1324 * erp current erp_head
1325 * RETURN VALUES
1326 * erp new erp_head - pointer to new ERP
1327 */
1328static struct dasd_ccw_req *
1329dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense)
1330{
1331
8e09f215 1332 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1333
1334 erp->function = dasd_3990_erp_env_data;
1335
fc19f381 1336 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Environmental data present");
1da177e4
LT		 1337
1338 dasd_3990_handle_env_data(erp, sense);
1339
1340 /* don't retry on disabled interface */
1341 if (sense[7] != 0x0F) {
1da177e4
LT		 1342 erp = dasd_3990_erp_action_4(erp, sense);
1343 } else {
8e09f215 1344 erp->status = DASD_CQR_FILLED;
1da177e4
LT		 1345 }
1346
1347 return erp;
1348
1349} /* end dasd_3990_erp_env_data */
1350
1351/*
1352 * DASD_3990_ERP_NO_REC
1353 *
1354 * DESCRIPTION
1355 * Handles 24 byte 'No Record Found' error.
1356 *
1357 * PARAMETER
1358 * erp already added default ERP
138c014d 1359 *
1da177e4
LT		 1360 * RETURN VALUES
1361 * erp new erp_head - pointer to new ERP
1362 */
1363static struct dasd_ccw_req *
1364dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense)
1365{
1366
8e09f215 1367 struct dasd_device *device = default_erp->startdev;
1da177e4 1368
fc19f381
SH		 1369 dev_err(&device->cdev->dev,
1370 "The specified record was not found\n");
1da177e4
LT		 1371
1372 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1373
1374} /* end dasd_3990_erp_no_rec */
1375
1376/*
1377 * DASD_3990_ERP_FILE_PROT
1378 *
1379 * DESCRIPTION
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.
1383 *
1384 * PARAMETER
1385 * erp current erp_head
1386 * RETURN VALUES
1387 * erp new erp_head - pointer to new ERP
1388 */
1389static struct dasd_ccw_req *
1390dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
1391{
1392
8e09f215 1393 struct dasd_device *device = erp->startdev;
1da177e4 1394
fc19f381
SH		 1395 dev_err(&device->cdev->dev, "Accessing the DASD failed because of "
1396 "a hardware error\n");
1da177e4
LT		 1397
1398 return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1399
1400} /* end dasd_3990_erp_file_prot */
1401
8e09f215
SW		 1402/*
1403 * DASD_3990_ERP_INSPECT_ALIAS
1404 *
1405 * DESCRIPTION
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.
1409 *
1410 * PARAMETER
1411 * erp pointer to the currently created default ERP
1412 *
1413 * RETURN VALUES
1414 * erp pointer to the modified ERP, or NULL
1415 */
1416
1417static struct dasd_ccw_req *dasd_3990_erp_inspect_alias(
1418 struct dasd_ccw_req *erp)
1419{
1420 struct dasd_ccw_req *cqr = erp->refers;
501183f2 1421 char *sense;
8e09f215
SW		 1422
1423 if (cqr->block &&
1424 (cqr->block->base != cqr->startdev)) {
501183f2
SH		 1425
1426 sense = dasd_get_sense(&erp->refers->irb);
1427 /*
1428 * dynamic pav may have changed base alias mapping
1429 */
1430 if (!test_bit(DASD_FLAG_OFFLINE, &cqr->startdev->flags) && sense
1431 && (sense[0] == 0x10) && (sense[7] == 0x0F)
1432 && (sense[8] == 0x67)) {
1433 /*
1434 * remove device from alias handling to prevent new
1435 * requests from being scheduled on the
1436 * wrong alias device
1437 */
1438 dasd_alias_remove_device(cqr->startdev);
1439
1440 /* schedule worker to reload device */
1441 dasd_reload_device(cqr->startdev);
1442 }
1443
8e09f215 1444 if (cqr->startdev->features & DASD_FEATURE_ERPLOG) {
fc19f381 1445 DBF_DEV_EVENT(DBF_ERR, cqr->startdev,
8e09f215
SW		 1446 "ERP on alias device for request %p,"
1447 " recover on base device %s", cqr,
2a0217d5 1448 dev_name(&cqr->block->base->cdev->dev));
8e09f215
SW		 1449 }
1450 dasd_eckd_reset_ccw_to_base_io(cqr);
1451 erp->startdev = cqr->block->base;
1452 erp->function = dasd_3990_erp_inspect_alias;
1453 return erp;
1454 } else
1455 return NULL;
1456}
1457
1458
1da177e4 1459/*
138c014d 1460 * DASD_3990_ERP_INSPECT_24
1da177e4
LT		 1461 *
1462 * DESCRIPTION
1463 * Does a detailed inspection of the 24 byte sense data
138c014d 1464 * and sets up a related error recovery action.
1da177e4
LT		 1465 *
1466 * PARAMETER
1467 * sense sense data of the actual error
1468 * erp pointer to the currently created default ERP
1469 *
1470 * RETURN VALUES
1471 * erp pointer to the (addtitional) ERP
1472 */
1473static struct dasd_ccw_req *
1474dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense)
1475{
1476
1477 struct dasd_ccw_req *erp_filled = NULL;
1478
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);
1483 }
1484 /* 'Intervention Required' */
1485 if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) {
1486 erp_filled = dasd_3990_erp_int_req(erp);
1487 }
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);
1491 }
1492 /* 'Equipment Check' */
1493 if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) {
1494 erp_filled = dasd_3990_erp_equip_check(erp, sense);
1495 }
1496 /* 'Data Check' */
1497 if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) {
1498 erp_filled = dasd_3990_erp_data_check(erp, sense);
1499 }
1500 /* 'Overrun' */
1501 if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) {
1502 erp_filled = dasd_3990_erp_overrun(erp, sense);
1503 }
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);
1507 }
1508 /* 'End-of-Cylinder' */
1509 if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) {
1510 erp_filled = dasd_3990_erp_EOC(erp, sense);
1511 }
1512 /* 'Environmental Data' */
1513 if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) {
1514 erp_filled = dasd_3990_erp_env_data(erp, sense);
1515 }
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);
1519 }
1520 /* 'File Protected' */
1521 if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) {
1522 erp_filled = dasd_3990_erp_file_prot(erp);
1523 }
1524 /* other (unknown) error - do default ERP */
1525 if (erp_filled == NULL) {
1526
1527 erp_filled = erp;
1528 }
1529
1530 return erp_filled;
1531
1532} /* END dasd_3990_erp_inspect_24 */
1533
1534/*
138c014d 1535 *****************************************************************************
1da177e4 1536 * 32 byte sense ERP functions (only)
138c014d 1537 *****************************************************************************
1da177e4
LT		 1538 */
1539
1540/*
138c014d 1541 * DASD_3990_ERPACTION_10_32
1da177e4
LT		 1542 *
1543 * DESCRIPTION
1544 * Handles 32 byte 'Action 10' of Single Program Action Codes.
1545 * Just retry and if retry doesn't work, return with error.
1546 *
1547 * PARAMETER
1548 * erp current erp_head
138c014d 1549 * sense current sense data
1da177e4
LT		 1550 * RETURN VALUES
1551 * erp modified erp_head
1552 */
1553static struct dasd_ccw_req *
1554dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense)
1555{
1556
8e09f215 1557 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1558
1559 erp->retries = 256;
1560 erp->function = dasd_3990_erp_action_10_32;
1561
fc19f381 1562 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Perform logging requested");
1da177e4
LT		 1563
1564 return erp;
1565
1566} /* end dasd_3990_erp_action_10_32 */
1567
1568/*
1569 * DASD_3990_ERP_ACTION_1B_32
1570 *
1571 * DESCRIPTION
1572 * Handles 32 byte 'Action 1B' of Single Program Action Codes.
138c014d 1573 * A write operation could not be finished because of an unexpected
1da177e4 1574 * condition.
138c014d
HH		 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
1da177e4
LT		 1577 * action because it contains no DE/LO data space.
1578 *
1579 * PARAMETER
1580 * default_erp already added default erp.
138c014d 1581 * sense current sense data
1da177e4
LT		 1582 *
1583 * RETURN VALUES
138c014d 1584 * erp new erp or
1da177e4
LT		 1585 * default_erp in case of imprecise ending or error
1586 */
1587static struct dasd_ccw_req *
1588dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1589{
1590
8e09f215 1591 struct dasd_device *device = default_erp->startdev;
1da177e4
LT		 1592 __u32 cpa = 0;
1593 struct dasd_ccw_req *cqr;
1594 struct dasd_ccw_req *erp;
1595 struct DE_eckd_data *DE_data;
8e09f215 1596 struct PFX_eckd_data *PFX_data;
1da177e4 1597 char *LO_data; /* LO_eckd_data_t */
8e09f215 1598 struct ccw1 *ccw, *oldccw;
1da177e4 1599
fc19f381 1600 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1601 "Write not finished because of unexpected condition");
1602
1603 default_erp->function = dasd_3990_erp_action_1B_32;
1604
1605 /* determine the original cqr */
1606 cqr = default_erp;
1607
1608 while (cqr->refers != NULL) {
1609 cqr = cqr->refers;
1610 }
1611
f3eb5384
SW		 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");
1616 return default_erp;
1617 }
1618
1da177e4
LT		 1619 /* for imprecise ending just do default erp */
1620 if (sense[1] & 0x01) {
fc19f381 1621 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1622 "Imprecise ending is set - just retry");
1623
1624 return default_erp;
1625 }
1626
1627 /* determine the address of the CCW to be restarted */
1628 /* Imprecise ending is not set -> addr from IRB-SCSW */
23d805b6 1629 cpa = default_erp->refers->irb.scsw.cmd.cpa;
1da177e4
LT		 1630
1631 if (cpa == 0) {
fc19f381 1632 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1633 "Unable to determine address of the CCW "
1634 "to be restarted");
1635
1636 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1637 }
1638
1639 /* Build new ERP request including DE/LO */
1640 erp = dasd_alloc_erp_request((char *) &cqr->magic,
1641 2 + 1,/* DE/LO + TIC */
8e09f215
SW		 1642 sizeof(struct DE_eckd_data) +
1643 sizeof(struct LO_eckd_data), device);
1da177e4
LT		 1644
1645 if (IS_ERR(erp)) {
fc19f381
SH		 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");
1da177e4
LT		 1649 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1650 }
1651
1652 /* use original DE */
1653 DE_data = erp->data;
8e09f215
SW		 1654 oldccw = cqr->cpaddr;
1655 if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) {
1656 PFX_data = cqr->data;
f3eb5384 1657 memcpy(DE_data, &PFX_data->define_extent,
8e09f215
SW		 1658 sizeof(struct DE_eckd_data));
1659 } else
1660 memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data));
1da177e4
LT		 1661
1662 /* create LO */
8e09f215 1663 LO_data = erp->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1664
1665 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
fc19f381 1666 /* should not */
1da177e4
LT		 1667 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1668 }
1669
1670 if ((sense[7] & 0x3F) == 0x01) {
1671 /* operation code is WRITE DATA -> data area orientation */
1672 LO_data[0] = 0x81;
1673
1674 } else if ((sense[7] & 0x3F) == 0x03) {
1675 /* operation code is FORMAT WRITE -> index orientation */
1676 LO_data[0] = 0xC3;
1677
1678 } else {
1679 LO_data[0] = sense[7]; /* operation */
1680 }
1681
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 */
1688
1689 memcpy(&(LO_data[8]), &(sense[11]), 8);
1690
1691 /* create DE ccw */
1692 ccw = erp->cpaddr;
8e09f215 1693 memset(ccw, 0, sizeof(struct ccw1));
1da177e4
LT		 1694 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
1695 ccw->flags = CCW_FLAG_CC;
1696 ccw->count = 16;
1697 ccw->cda = (__u32)(addr_t) DE_data;
1698
1699 /* create LO ccw */
1700 ccw++;
8e09f215 1701 memset(ccw, 0, sizeof(struct ccw1));
1da177e4
LT		 1702 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
1703 ccw->flags = CCW_FLAG_CC;
1704 ccw->count = 16;
1705 ccw->cda = (__u32)(addr_t) LO_data;
1706
1707 /* TIC to the failed ccw */
1708 ccw++;
1709 ccw->cmd_code = CCW_CMD_TIC;
1710 ccw->cda = cpa;
1711
1712 /* fill erp related fields */
1713 erp->function = dasd_3990_erp_action_1B_32;
1714 erp->refers = default_erp->refers;
8e09f215
SW		 1715 erp->startdev = device;
1716 erp->memdev = device;
1da177e4
LT		 1717 erp->magic = default_erp->magic;
1718 erp->expires = 0;
1719 erp->retries = 256;
1720 erp->buildclk = get_clock();
1721 erp->status = DASD_CQR_FILLED;
1722
1723 /* remove the default erp */
1724 dasd_free_erp_request(default_erp, device);
1725
1726 return erp;
1727
1728} /* end dasd_3990_erp_action_1B_32 */
1729
1730/*
1731 * DASD_3990_UPDATE_1B
1732 *
1733 * DESCRIPTION
138c014d 1734 * Handles the update to the 32 byte 'Action 1B' of Single Program
1da177e4
LT		 1735 * Action Codes in case the first action was not successful.
1736 * The already created 'previous_erp' is the currently not successful
138c014d 1737 * ERP.
1da177e4
LT		 1738 *
1739 * PARAMETER
1740 * previous_erp already created previous erp.
138c014d 1741 * sense current sense data
1da177e4 1742 * RETURN VALUES
138c014d 1743 * erp modified erp
1da177e4
LT		 1744 */
1745static struct dasd_ccw_req *
1746dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
1747{
1748
8e09f215 1749 struct dasd_device *device = previous_erp->startdev;
1da177e4
LT		 1750 __u32 cpa = 0;
1751 struct dasd_ccw_req *cqr;
1752 struct dasd_ccw_req *erp;
1753 char *LO_data; /* struct LO_eckd_data */
1754 struct ccw1 *ccw;
1755
fc19f381 1756 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1757 "Write not finished because of unexpected condition"
1758 " - follow on");
1759
1760 /* determine the original cqr */
1761 cqr = previous_erp;
1762
1763 while (cqr->refers != NULL) {
1764 cqr = cqr->refers;
1765 }
1766
f3eb5384
SW		 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;
1772 }
1773
1da177e4
LT		 1774 /* for imprecise ending just do default erp */
1775 if (sense[1] & 0x01) {
fc19f381 1776 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1777 "Imprecise ending is set - just retry");
1778
8e09f215 1779 previous_erp->status = DASD_CQR_FILLED;
1da177e4
LT		 1780
1781 return previous_erp;
1782 }
1783
1784 /* determine the address of the CCW to be restarted */
1785 /* Imprecise ending is not set -> addr from IRB-SCSW */
23d805b6 1786 cpa = previous_erp->irb.scsw.cmd.cpa;
1da177e4
LT		 1787
1788 if (cpa == 0) {
fc19f381
SH		 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");
1da177e4
LT		 1793
1794 previous_erp->status = DASD_CQR_FAILED;
1795
1796 return previous_erp;
1797 }
1798
1799 erp = previous_erp;
1800
1801 /* update the LO with the new returned sense data */
8e09f215 1802 LO_data = erp->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1803
1804 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
fc19f381 1805 /* should not happen */
1da177e4
LT		 1806 previous_erp->status = DASD_CQR_FAILED;
1807
1808 return previous_erp;
1809 }
1810
1811 if ((sense[7] & 0x3F) == 0x01) {
1812 /* operation code is WRITE DATA -> data area orientation */
1813 LO_data[0] = 0x81;
1814
1815 } else if ((sense[7] & 0x3F) == 0x03) {
1816 /* operation code is FORMAT WRITE -> index orientation */
1817 LO_data[0] = 0xC3;
1818
1819 } else {
1820 LO_data[0] = sense[7]; /* operation */
1821 }
1822
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 */
1829
1830 memcpy(&(LO_data[8]), &(sense[11]), 8);
1831
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 */
1836 ccw->cda = cpa;
1837
8e09f215 1838 erp->status = DASD_CQR_FILLED;
1da177e4
LT		 1839
1840 return erp;
1841
1842} /* end dasd_3990_update_1B */
1843
1844/*
138c014d 1845 * DASD_3990_ERP_COMPOUND_RETRY
1da177e4
LT		 1846 *
1847 * DESCRIPTION
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
1851 * easier.
1852 *
1853 * PARAMETER
1854 * sense sense data of the actual error
1855 * erp pointer to the currently created ERP
1856 *
1857 * RETURN VALUES
1858 * erp modified ERP pointer
1859 *
1860 */
1861static void
1862dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense)
1863{
1864
1865 switch (sense[25] & 0x03) {
1866 case 0x00: /* no not retry */
1867 erp->retries = 1;
1868 break;
1869
1870 case 0x01: /* retry 2 times */
1871 erp->retries = 2;
1872 break;
1873
1874 case 0x02: /* retry 10 times */
1875 erp->retries = 10;
1876 break;
1877
1878 case 0x03: /* retry 256 times */
1879 erp->retries = 256;
1880 break;
1881
1882 default:
1883 BUG();
1884 }
1885
1886 erp->function = dasd_3990_erp_compound_retry;
1887
1888} /* end dasd_3990_erp_compound_retry */
1889
1890/*
138c014d 1891 * DASD_3990_ERP_COMPOUND_PATH
1da177e4
LT		 1892 *
1893 * DESCRIPTION
1894 * Handles the compound ERP action for retry on alternate
1895 * channel path.
1896 *
1897 * PARAMETER
1898 * sense sense data of the actual error
1899 * erp pointer to the currently created ERP
1900 *
1901 * RETURN VALUES
1902 * erp modified ERP pointer
1903 *
1904 */
1905static void
1906dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
1907{
1908
1909 if (sense[25] & DASD_SENSE_BIT_3) {
1910 dasd_3990_erp_alternate_path(erp);
1911
1912 if (erp->status == DASD_CQR_FAILED) {
138c014d 1913 /* reset the lpm and the status to be able to
1da177e4
LT		 1914 * try further actions. */
1915
1916 erp->lpm = 0;
8e09f215 1917 erp->status = DASD_CQR_NEED_ERP;
1da177e4
LT		 1918 }
1919 }
1920
1921 erp->function = dasd_3990_erp_compound_path;
1922
1923} /* end dasd_3990_erp_compound_path */
1924
1925/*
138c014d 1926 * DASD_3990_ERP_COMPOUND_CODE
1da177e4
LT		 1927 *
1928 * DESCRIPTION
1929 * Handles the compound ERP action for retry code.
1930 *
1931 * PARAMETER
1932 * sense sense data of the actual error
1933 * erp pointer to the currently created ERP
1934 *
1935 * RETURN VALUES
1936 * erp NEW ERP pointer
1937 *
1938 */
1939static struct dasd_ccw_req *
1940dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense)
1941{
1942
1943 if (sense[25] & DASD_SENSE_BIT_2) {
1944
1945 switch (sense[28]) {
1946 case 0x17:
138c014d 1947 /* issue a Diagnostic Control command with an
3a4fa0a2 1948 * Inhibit Write subcommand and controller modifier */
1da177e4
LT		 1949 erp = dasd_3990_erp_DCTL(erp, 0x20);
1950 break;
138c014d 1951
1da177e4
LT		 1952 case 0x25:
1953 /* wait for 5 seconds and retry again */
1954 erp->retries = 1;
138c014d 1955
1da177e4
LT		 1956 dasd_3990_erp_block_queue (erp, 5*HZ);
1957 break;
138c014d 1958
1da177e4
LT		 1959 default:
1960 /* should not happen - continue */
1961 break;
1962 }
1963 }
1964
1965 erp->function = dasd_3990_erp_compound_code;
1966
1967 return erp;
1968
1969} /* end dasd_3990_erp_compound_code */
1970
1971/*
138c014d 1972 * DASD_3990_ERP_COMPOUND_CONFIG
1da177e4
LT		 1973 *
1974 * DESCRIPTION
1975 * Handles the compound ERP action for configruation
1976 * dependent error.
1977 * Note: duplex handling is not implemented (yet).
1978 *
1979 * PARAMETER
1980 * sense sense data of the actual error
1981 * erp pointer to the currently created ERP
1982 *
1983 * RETURN VALUES
1984 * erp modified ERP pointer
1985 *
1986 */
1987static void
1988dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
1989{
1990
1991 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) {
1992
fc19f381
SH		 1993 /* set to suspended duplex state then restart
1994 internal error 05 - Set device to suspended duplex state
1995 should be done */
8e09f215 1996 struct dasd_device *device = erp->startdev;
fc19f381
SH		 1997 dev_err(&device->cdev->dev,
1998 "An error occurred in the DASD device driver, "
1999 "reason=%s\n", "05");
1da177e4
LT		 2000
2001 }
2002
2003 erp->function = dasd_3990_erp_compound_config;
2004
2005} /* end dasd_3990_erp_compound_config */
2006
2007/*
138c014d 2008 * DASD_3990_ERP_COMPOUND
1da177e4
LT		 2009 *
2010 * DESCRIPTION
138c014d 2011 * Does the further compound program action if
1da177e4
LT		 2012 * compound retry was not successful.
2013 *
2014 * PARAMETER
2015 * sense sense data of the actual error
2016 * erp pointer to the current (failed) ERP
2017 *
2018 * RETURN VALUES
2019 * erp (additional) ERP pointer
2020 *
2021 */
2022static struct dasd_ccw_req *
2023dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense)
2024{
2025
2026 if ((erp->function == dasd_3990_erp_compound_retry) &&
8e09f215 2027 (erp->status == DASD_CQR_NEED_ERP)) {
1da177e4
LT		 2028
2029 dasd_3990_erp_compound_path(erp, sense);
2030 }
2031
2032 if ((erp->function == dasd_3990_erp_compound_path) &&
8e09f215 2033 (erp->status == DASD_CQR_NEED_ERP)) {
1da177e4
LT		 2034
2035 erp = dasd_3990_erp_compound_code(erp, sense);
2036 }
2037
2038 if ((erp->function == dasd_3990_erp_compound_code) &&
8e09f215 2039 (erp->status == DASD_CQR_NEED_ERP)) {
1da177e4
LT		 2040
2041 dasd_3990_erp_compound_config(erp, sense);
2042 }
2043
2044 /* if no compound action ERP specified, the request failed */
8e09f215 2045 if (erp->status == DASD_CQR_NEED_ERP)
1da177e4 2046 erp->status = DASD_CQR_FAILED;
1da177e4
LT		 2047
2048 return erp;
2049
2050} /* end dasd_3990_erp_compound */
2051
f60c768c
SH		 2052/*
2053 *DASD_3990_ERP_HANDLE_SIM
2054 *
2055 *DESCRIPTION
2056 * inspects the SIM SENSE data and starts an appropriate action
2057 *
2058 * PARAMETER
2059 * sense sense data of the actual error
2060 *
2061 * RETURN VALUES
2062 * none
2063 */
2064void
2065dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense)
2066{
2067 /* print message according to log or message to operator mode */
2068 if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) {
f60c768c 2069 /* print SIM SRC from RefCode */
fc19f381
SH		 2070 dev_err(&device->cdev->dev, "SIM - SRC: "
2071 "%02x%02x%02x%02x\n", sense[22],
f60c768c
SH		 2072 sense[23], sense[11], sense[12]);
2073 } else if (sense[24] & DASD_SIM_LOG) {
2074 /* print SIM SRC Refcode */
fc19f381
SH		 2075 dev_warn(&device->cdev->dev, "log SIM - SRC: "
2076 "%02x%02x%02x%02x\n", sense[22],
f60c768c
SH		 2077 sense[23], sense[11], sense[12]);
2078 }
2079}
2080
1da177e4 2081/*
138c014d 2082 * DASD_3990_ERP_INSPECT_32
1da177e4
LT		 2083 *
2084 * DESCRIPTION
2085 * Does a detailed inspection of the 32 byte sense data
138c014d 2086 * and sets up a related error recovery action.
1da177e4
LT		 2087 *
2088 * PARAMETER
2089 * sense sense data of the actual error
2090 * erp pointer to the currently created default ERP
2091 *
2092 * RETURN VALUES
2093 * erp_filled pointer to the ERP
2094 *
2095 */
2096static struct dasd_ccw_req *
2097dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
2098{
2099
8e09f215 2100 struct dasd_device *device = erp->startdev;
1da177e4
LT		 2101
2102 erp->function = dasd_3990_erp_inspect_32;
2103
f60c768c
SH		 2104 /* check for SIM sense data */
2105 if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)
2106 dasd_3990_erp_handle_sim(device, sense);
2107
1da177e4
LT		 2108 if (sense[25] & DASD_SENSE_BIT_0) {
2109
2110 /* compound program action codes (byte25 bit 0 == '1') */
2111 dasd_3990_erp_compound_retry(erp, sense);
2112
2113 } else {
2114
2115 /* single program action codes (byte25 bit 0 == '0') */
2116 switch (sense[25]) {
2117
2118 case 0x00: /* success - use default ERP for retries */
fc19f381 2119 DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
1da177e4
LT		 2120 "ERP called for successful request"
2121 " - just retry");
2122 break;
2123
2124 case 0x01: /* fatal error */
fc19f381
SH		 2125 dev_err(&device->cdev->dev,
2126 "ERP failed for the DASD\n");
1da177e4
LT		 2127
2128 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2129 break;
2130
2131 case 0x02: /* intervention required */
2132 case 0x03: /* intervention required during dual copy */
2133 erp = dasd_3990_erp_int_req(erp);
2134 break;
2135
fc19f381
SH		 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");
1da177e4
LT		 2140
2141 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2142 break;
2143
2144 case 0x10: /* logging required for other channel program */
2145 erp = dasd_3990_erp_action_10_32(erp, sense);
2146 break;
2147
fc19f381
SH		 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");
1da177e4
LT		 2154
2155 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2156 break;
2157
2158 case 0x1B: /* unexpected condition during write */
2159
2160 erp = dasd_3990_erp_action_1B_32(erp, sense);
2161 break;
2162
2163 case 0x1C: /* invalid data */
fc19f381 2164 dev_emerg(&device->cdev->dev,
1da177e4 2165 "Data recovered during retry with PCI "
fc19f381 2166 "fetch mode active\n");
1da177e4
LT		 2167
2168 /* not possible to handle this situation in Linux */
2169 panic
2170 ("Invalid data - No way to inform application "
2171 "about the possibly incorrect data");
2172 break;
2173
2174 case 0x1D: /* state-change pending */
fc19f381 2175 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2176 "A State change pending condition exists "
2177 "for the subsystem or device");
2178
2179 erp = dasd_3990_erp_action_4(erp, sense);
2180 break;
2181
2182 case 0x1E: /* busy */
fc19f381 2183 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2184 "Busy condition exists "
2185 "for the subsystem or device");
2186 erp = dasd_3990_erp_action_4(erp, sense);
2187 break;
2188
2189 default: /* all others errors - default erp */
2190 break;
2191 }
2192 }
2193
2194 return erp;
2195
2196} /* end dasd_3990_erp_inspect_32 */
2197
2198/*
138c014d 2199 *****************************************************************************
1da177e4 2200 * main ERP control fuctions (24 and 32 byte sense)
138c014d 2201 *****************************************************************************
1da177e4
LT		 2202 */
2203
6c5f57c7
SH		 2204/*
2205 * DASD_3990_ERP_CONTROL_CHECK
2206 *
2207 * DESCRIPTION
2208 * Does a generic inspection if a control check occured and sets up
2209 * the related error recovery procedure
2210 *
2211 * PARAMETER
2212 * erp pointer to the currently created default ERP
2213 *
2214 * RETURN VALUES
2215 * erp_filled pointer to the erp
2216 */
2217
2218static struct dasd_ccw_req *
2219dasd_3990_erp_control_check(struct dasd_ccw_req *erp)
2220{
2221 struct dasd_device *device = erp->startdev;
2222
f3eb5384 2223 if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK
6c5f57c7 2224 | SCHN_STAT_CHN_CTRL_CHK)) {
fc19f381 2225 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6c5f57c7
SH		 2226 "channel or interface control check");
2227 erp = dasd_3990_erp_action_4(erp, NULL);
2228 }
2229 return erp;
2230}
2231
1da177e4
LT		 2232/*
2233 * DASD_3990_ERP_INSPECT
2234 *
2235 * DESCRIPTION
2236 * Does a detailed inspection for sense data by calling either
2237 * the 24-byte or the 32-byte inspection routine.
2238 *
2239 * PARAMETER
2240 * erp pointer to the currently created default ERP
2241 * RETURN VALUES
138c014d 2242 * erp_new contens was possibly modified
1da177e4
LT		 2243 */
2244static struct dasd_ccw_req *
f3eb5384 2245dasd_3990_erp_inspect(struct dasd_ccw_req *erp)
1da177e4
LT		 2246{
2247
2248 struct dasd_ccw_req *erp_new = NULL;
f3eb5384 2249 char *sense;
1da177e4 2250
8e09f215
SW		 2251 /* if this problem occured on an alias retry on base */
2252 erp_new = dasd_3990_erp_inspect_alias(erp);
2253 if (erp_new)
2254 return erp_new;
2255
f3eb5384
SW		 2256 /* sense data are located in the refers record of the
2257 * already set up new ERP !
2258 * check if concurrent sens is available
2259 */
2260 sense = dasd_get_sense(&erp->refers->irb);
2261 if (!sense)
6c5f57c7 2262 erp_new = dasd_3990_erp_control_check(erp);
1da177e4 2263 /* distinguish between 24 and 32 byte sense data */
6c5f57c7 2264 else if (sense[27] & DASD_SENSE_BIT_0) {
1da177e4
LT		 2265
2266 /* inspect the 24 byte sense data */
2267 erp_new = dasd_3990_erp_inspect_24(erp, sense);
2268
2269 } else {
2270
2271 /* inspect the 32 byte sense data */
2272 erp_new = dasd_3990_erp_inspect_32(erp, sense);
2273
2274 } /* end distinguish between 24 and 32 byte sense data */
2275
2276 return erp_new;
2277}
2278
2279/*
2280 * DASD_3990_ERP_ADD_ERP
138c014d 2281 *
1da177e4
LT		 2282 * DESCRIPTION
2283 * This funtion adds an additional request block (ERP) to the head of
2284 * the given cqr (or erp).
f3eb5384
SW		 2285 * For a command mode cqr the erp is initialized as an default erp
2286 * (retry TIC).
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.
1da177e4
LT		 2290 *
2291 * PARAMETER
138c014d 2292 * cqr head of the current ERP-chain (or single cqr if
1da177e4
LT		 2293 * first error)
2294 * RETURN VALUES
2295 * erp pointer to new ERP-chain head
2296 */
f3eb5384 2297static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr)
1da177e4
LT		 2298{
2299
8e09f215 2300 struct dasd_device *device = cqr->startdev;
1da177e4 2301 struct ccw1 *ccw;
1da177e4 2302 struct dasd_ccw_req *erp;
f3eb5384
SW		 2303 int cplength, datasize;
2304 struct tcw *tcw;
2305 struct tsb *tsb;
2306
2307 if (cqr->cpmode == 1) {
2308 cplength = 0;
4a31ba57
SW		 2309 /* TCW needs to be 64 byte aligned, so leave enough room */
2310 datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb);
f3eb5384
SW		 2311 } else {
2312 cplength = 2;
2313 datasize = 0;
2314 }
1da177e4 2315
f3eb5384
SW		 2316 /* allocate additional request block */
2317 erp = dasd_alloc_erp_request((char *) &cqr->magic,
2318 cplength, datasize, device);
1da177e4
LT		 2319 if (IS_ERR(erp)) {
2320 if (cqr->retries <= 0) {
fc19f381 2321 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1da177e4
LT		 2322 "Unable to allocate ERP request");
2323 cqr->status = DASD_CQR_FAILED;
2324 cqr->stopclk = get_clock ();
2325 } else {
fc19f381 2326 DBF_DEV_EVENT(DBF_ERR, device,
1da177e4
LT		 2327 "Unable to allocate ERP request "
2328 "(%i retries left)",
2329 cqr->retries);
8e09f215 2330 dasd_block_set_timer(device->block, (HZ << 3));
1da177e4 2331 }
6a5176c4 2332 return erp;
1da177e4
LT		 2333 }
2334
eb6e199b 2335 ccw = cqr->cpaddr;
f3eb5384
SW		 2336 if (cqr->cpmode == 1) {
2337 /* make a shallow copy of the original tcw but set new tsb */
2338 erp->cpmode = 1;
4a31ba57
SW		 2339 erp->cpaddr = PTR_ALIGN(erp->data, 64);
2340 tcw = erp->cpaddr;
f3eb5384
SW		 2341 tsb = (struct tsb *) &tcw[1];
2342 *tcw = *((struct tcw *)cqr->cpaddr);
2343 tcw->tsb = (long)tsb;
eb6e199b
SW		 2344 } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) {
2345 /* PSF cannot be chained from NOOP/TIC */
2346 erp->cpaddr = cqr->cpaddr;
f3eb5384
SW		 2347 } else {
2348 /* initialize request with default TIC to current ERP/CQR */
2349 ccw = erp->cpaddr;
2350 ccw->cmd_code = CCW_CMD_NOOP;
2351 ccw->flags = CCW_FLAG_CC;
2352 ccw++;
2353 ccw->cmd_code = CCW_CMD_TIC;
2354 ccw->cda = (long)(cqr->cpaddr);
2355 }
2356
1da177e4
LT		 2357 erp->function = dasd_3990_erp_add_erp;
2358 erp->refers = cqr;
8e09f215
SW		 2359 erp->startdev = device;
2360 erp->memdev = device;
2361 erp->block = cqr->block;
1da177e4
LT		 2362 erp->magic = cqr->magic;
2363 erp->expires = 0;
2364 erp->retries = 256;
2365 erp->buildclk = get_clock();
1da177e4
LT		 2366 erp->status = DASD_CQR_FILLED;
2367
2368 return erp;
2369}
2370
2371/*
138c014d
HH		 2372 * DASD_3990_ERP_ADDITIONAL_ERP
2373 *
1da177e4
LT		 2374 * DESCRIPTION
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.
2378 *
2379 * PARAMETER
138c014d 2380 * cqr head of the current ERP-chain (or single cqr if
1da177e4
LT		 2381 * first error)
2382 *
2383 * RETURN VALUES
2384 * erp pointer to new ERP-chain head
2385 */
2386static struct dasd_ccw_req *
2387dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr)
2388{
2389
2390 struct dasd_ccw_req *erp = NULL;
2391
2392 /* add erp and initialize with default TIC */
2393 erp = dasd_3990_erp_add_erp(cqr);
2394
6a5176c4
SH		 2395 if (IS_ERR(erp))
2396 return erp;
2397
1da177e4
LT		 2398 /* inspect sense, determine specific ERP if possible */
2399 if (erp != cqr) {
2400
2401 erp = dasd_3990_erp_inspect(erp);
2402 }
2403
2404 return erp;
2405
2406} /* end dasd_3990_erp_additional_erp */
2407
2408/*
2409 * DASD_3990_ERP_ERROR_MATCH
2410 *
2411 * DESCRIPTION
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
2414 * must match.
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.
2417 *
2418 * PARAMETER
138c014d 2419 * cqr1 first cqr, which will be compared with the
1da177e4
LT		 2420 * cqr2 second cqr.
2421 *
2422 * RETURN VALUES
2423 * match 'boolean' for match found
2424 * returns 1 if match found, otherwise 0.
2425 */
f3eb5384
SW		 2426static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1,
2427 struct dasd_ccw_req *cqr2)
1da177e4 2428{
f3eb5384 2429 char *sense1, *sense2;
1da177e4 2430
5c12f240
SW		 2431 if (cqr1->startdev != cqr2->startdev)
2432 return 0;
1da177e4 2433
f3eb5384
SW		 2434 sense1 = dasd_get_sense(&cqr1->irb);
2435 sense2 = dasd_get_sense(&cqr2->irb);
6c5f57c7 2436
f3eb5384
SW		 2437 /* one request has sense data, the other not -> no match, return 0 */
2438 if (!sense1 != !sense2)
2439 return 0;
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)))
6c5f57c7
SH		 2446 return 1; /* match with ifcc*/
2447 }
1da177e4 2448 /* check sense data; byte 0-2,25,27 */
f3eb5384
SW		 2449 if (!(sense1 && sense2 &&
2450 (memcmp(sense1, sense2, 3) == 0) &&
2451 (sense1[27] == sense2[27]) &&
2452 (sense1[25] == sense2[25]))) {
1da177e4
LT		 2453
2454 return 0; /* sense doesn't match */
2455 }
2456
2457 return 1; /* match */
2458
2459} /* end dasd_3990_erp_error_match */
2460
2461/*
2462 * DASD_3990_ERP_IN_ERP
2463 *
2464 * DESCRIPTION
2465 * check if the current error already happened before.
2466 * quick exit if current cqr is not an ERP (cqr->refers=NULL)
2467 *
2468 * PARAMETER
2469 * cqr failed cqr (either original cqr or already an erp)
2470 *
2471 * RETURN VALUES
138c014d 2472 * erp erp-pointer to the already defined error
1da177e4
LT		 2473 * recovery procedure OR
2474 * NULL if a 'new' error occurred.
2475 */
2476static struct dasd_ccw_req *
2477dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr)
2478{
2479
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 */
2483
2484 if (cqr->refers == NULL) { /* return if not in erp */
2485 return NULL;
2486 }
2487
2488 /* check the erp/cqr chain for current error */
2489 do {
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 */
2493
2494 } while ((cqr->refers != NULL) && (!match));
2495
2496 if (!match) {
2497 return NULL; /* no match was found */
2498 }
2499
2500 return erp_match; /* return address of matching erp */
2501
2502} /* END dasd_3990_erp_in_erp */
2503
2504/*
2505 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense)
2506 *
2507 * DESCRIPTION
138c014d 2508 * No retry is left for the current ERP. Check what has to be done
1da177e4
LT		 2509 * with the ERP.
2510 * - do further defined ERP action or
138c014d 2511 * - wait for interrupt or
1da177e4
LT		 2512 * - exit with permanent error
2513 *
2514 * PARAMETER
2515 * erp ERP which is in progress with no retry left
2516 *
2517 * RETURN VALUES
2518 * erp modified/additional ERP
2519 */
2520static struct dasd_ccw_req *
2521dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
2522{
2523
8e09f215 2524 struct dasd_device *device = erp->startdev;
f3eb5384 2525 char *sense = dasd_get_sense(&erp->irb);
1da177e4
LT		 2526
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)) {
2531
2532 erp = dasd_3990_erp_action_1(erp);
2533
eb6e199b
SW		 2534 } else if (erp->function == dasd_3990_erp_action_1_sec) {
2535 erp = dasd_3990_erp_action_1_sec(erp);
1da177e4
LT		 2536 } else if (erp->function == dasd_3990_erp_action_5) {
2537
2538 /* retries have not been successful */
2539 /* prepare erp for retry on different channel path */
2540 erp = dasd_3990_erp_action_1(erp);
2541
f3eb5384 2542 if (sense && !(sense[2] & DASD_SENSE_BIT_0)) {
1da177e4 2543
138c014d 2544 /* issue a Diagnostic Control command with an
1da177e4
LT		 2545 * Inhibit Write subcommand */
2546
2547 switch (sense[25]) {
2548 case 0x17:
2549 case 0x57:{ /* controller */
2550 erp = dasd_3990_erp_DCTL(erp, 0x20);
2551 break;
2552 }
2553 case 0x18:
2554 case 0x58:{ /* channel path */
2555 erp = dasd_3990_erp_DCTL(erp, 0x40);
2556 break;
2557 }
2558 case 0x19:
2559 case 0x59:{ /* storage director */
2560 erp = dasd_3990_erp_DCTL(erp, 0x80);
2561 break;
2562 }
2563 default:
fc19f381 2564 DBF_DEV_EVENT(DBF_WARNING, device,
1da177e4
LT		 2565 "invalid subcommand modifier 0x%x "
2566 "for Diagnostic Control Command",
2567 sense[25]);
2568 }
2569 }
2570
2571 /* check for 32 byte sense ERP */
f3eb5384
SW		 2572 } else if (sense &&
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))) {
1da177e4
LT		 2577
2578 erp = dasd_3990_erp_compound(erp, sense);
2579
2580 } else {
fc19f381
SH		 2581 /*
2582 * No retry left and no additional special handling
2583 * necessary
2584 */
2585 dev_err(&device->cdev->dev,
2586 "ERP %p has run out of retries and failed\n", erp);
1da177e4
LT		 2587
2588 erp->status = DASD_CQR_FAILED;
2589 }
2590
2591 return erp;
2592
2593} /* end dasd_3990_erp_further_erp */
2594
2595/*
138c014d 2596 * DASD_3990_ERP_HANDLE_MATCH_ERP
1da177e4
LT		 2597 *
2598 * DESCRIPTION
2599 * An error occurred again and an ERP has been detected which is already
138c014d 2600 * used to handle this error (e.g. retries).
1da177e4
LT		 2601 * All prior ERP's are asumed to be successful and therefore removed
2602 * from queue.
138c014d 2603 * If retry counter of matching erp is already 0, it is checked if further
1da177e4
LT		 2604 * action is needed (besides retry) or if the ERP has failed.
2605 *
2606 * PARAMETER
2607 * erp_head first ERP in ERP-chain
2608 * erp ERP that handles the actual error.
2609 * (matching erp)
2610 *
2611 * RETURN VALUES
2612 * erp modified/additional ERP
2613 */
2614static struct dasd_ccw_req *
2615dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
2616 struct dasd_ccw_req *erp)
2617{
2618
8e09f215 2619 struct dasd_device *device = erp_head->startdev;
1da177e4
LT		 2620 struct dasd_ccw_req *erp_done = erp_head; /* finished req */
2621 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */
2622
2623 /* loop over successful ERPs and remove them from chanq */
2624 while (erp_done != erp) {
2625
2626 if (erp_done == NULL) /* end of chain reached */
2627 panic(PRINTK_HEADER "Programming error in ERP! The "
2628 "original request was lost\n");
2629
2630 /* remove the request from the device queue */
8e09f215 2631 list_del(&erp_done->blocklist);
1da177e4
LT		 2632
2633 erp_free = erp_done;
2634 erp_done = erp_done->refers;
2635
2636 /* free the finished erp request */
8e09f215 2637 dasd_free_erp_request(erp_free, erp_free->memdev);
1da177e4
LT		 2638
2639 } /* end while */
2640
2641 if (erp->retries > 0) {
2642
f3eb5384 2643 char *sense = dasd_get_sense(&erp->refers->irb);
1da177e4
LT		 2644
2645 /* check for special retries */
f3eb5384 2646 if (sense && erp->function == dasd_3990_erp_action_4) {
1da177e4
LT		 2647
2648 erp = dasd_3990_erp_action_4(erp, sense);
2649
f3eb5384
SW		 2650 } else if (sense &&
2651 erp->function == dasd_3990_erp_action_1B_32) {
1da177e4
LT		 2652
2653 erp = dasd_3990_update_1B(erp, sense);
2654
f3eb5384 2655 } else if (sense && erp->function == dasd_3990_erp_int_req) {
1da177e4
LT		 2656
2657 erp = dasd_3990_erp_int_req(erp);
2658
2659 } else {
2660 /* simple retry */
fc19f381 2661 DBF_DEV_EVENT(DBF_DEBUG, device,
1da177e4
LT		 2662 "%i retries left for erp %p",
2663 erp->retries, erp);
2664
2665 /* handle the request again... */
8e09f215 2666 erp->status = DASD_CQR_FILLED;
1da177e4
LT		 2667 }
2668
2669 } else {
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);
2673 }
2674
2675 return erp;
2676
2677} /* end dasd_3990_erp_handle_match_erp */
2678
2679/*
2680 * DASD_3990_ERP_ACTION
2681 *
2682 * DESCRIPTION
5d67d164 2683 * control routine for 3990 erp actions.
1da177e4
LT		 2684 * Has to be called with the queue lock (namely the s390_irq_lock) acquired.
2685 *
2686 * PARAMETER
2687 * cqr failed cqr (either original cqr or already an erp)
2688 *
2689 * RETURN VALUES
2690 * erp erp-pointer to the head of the ERP action chain.
2691 * This means:
2692 * - either a ptr to an additional ERP cqr or
138c014d 2693 * - the original given cqr (which's status might
1da177e4
LT		 2694 * be modified)
2695 */
2696struct dasd_ccw_req *
2697dasd_3990_erp_action(struct dasd_ccw_req * cqr)
2698{
1da177e4 2699 struct dasd_ccw_req *erp = NULL;
8e09f215 2700 struct dasd_device *device = cqr->startdev;
9575bf26 2701 struct dasd_ccw_req *temp_erp = NULL;
1da177e4 2702
9575bf26
HH		 2703 if (device->features & DASD_FEATURE_ERPLOG) {
2704 /* print current erp_chain */
fc19f381
SH		 2705 dev_err(&device->cdev->dev,
2706 "ERP chain at BEGINNING of ERP-ACTION\n");
1da177e4
LT		 2707 for (temp_erp = cqr;
2708 temp_erp != NULL; temp_erp = temp_erp->refers) {
2709
fc19f381
SH		 2710 dev_err(&device->cdev->dev,
2711 "ERP %p (%02x) refers to %p\n",
1da177e4
LT		 2712 temp_erp, temp_erp->status,
2713 temp_erp->refers);
2714 }
2715 }
1da177e4 2716
73ac36ea 2717 /* double-check if current erp/cqr was successful */
f3eb5384
SW		 2718 if ((scsw_cstat(&cqr->irb.scsw) == 0x00) &&
2719 (scsw_dstat(&cqr->irb.scsw) ==
23d805b6 2720 (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) {
1da177e4 2721
fc19f381 2722 DBF_DEV_EVENT(DBF_DEBUG, device,
1da177e4
LT		 2723 "ERP called for successful request %p"
2724 " - NO ERP necessary", cqr);
2725
2726 cqr->status = DASD_CQR_DONE;
2727
2728 return cqr;
2729 }
1da177e4
LT		 2730
2731 /* check if error happened before */
2732 erp = dasd_3990_erp_in_erp(cqr);
2733
2734 if (erp == NULL) {
2735 /* no matching erp found - set up erp */
2736 erp = dasd_3990_erp_additional_erp(cqr);
6a5176c4
SH		 2737 if (IS_ERR(erp))
2738 return erp;
1da177e4
LT		 2739 } else {
2740 /* matching erp found - set all leading erp's to DONE */
2741 erp = dasd_3990_erp_handle_match_erp(cqr, erp);
2742 }
2743
9575bf26
HH		 2744 if (device->features & DASD_FEATURE_ERPLOG) {
2745 /* print current erp_chain */
fc19f381
SH		 2746 dev_err(&device->cdev->dev,
2747 "ERP chain at END of ERP-ACTION\n");
1da177e4
LT		 2748 for (temp_erp = erp;
2749 temp_erp != NULL; temp_erp = temp_erp->refers) {
2750
fc19f381
SH		 2751 dev_err(&device->cdev->dev,
2752 "ERP %p (%02x) refers to %p\n",
1da177e4
LT		 2753 temp_erp, temp_erp->status,
2754 temp_erp->refers);
2755 }
2756 }
1da177e4 2757
8e09f215
SW		 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);
1da177e4
LT		 2763 }
2764
fc19f381
SH		 2765
2766
1da177e4
LT		 2767 return erp;
2768
2769} /* end dasd_3990_erp_action */
Linux 6.x block layer and io_uring tree(s)