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Fix common misspellings
[deliverable/linux.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 155 if (erp->lpm == 0)
a4d26c6a
SW		 156 erp->lpm = device->path_data.opm &
157 ~(erp->irb.esw.esw0.sublog.lpum);
1da177e4
LT		 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;
7ea8d321 224 dctl_cqr->flags = erp->flags;
1da177e4
LT		 225 dctl_cqr->function = dasd_3990_erp_DCTL;
226 dctl_cqr->refers = erp;
8e09f215
SW		 227 dctl_cqr->startdev = device;
228 dctl_cqr->memdev = device;
1da177e4
LT		 229 dctl_cqr->magic = erp->magic;
230 dctl_cqr->expires = 5 * 60 * HZ;
231 dctl_cqr->retries = 2;
232
233 dctl_cqr->buildclk = get_clock();
234
235 dctl_cqr->status = DASD_CQR_FILLED;
236
237 return dctl_cqr;
238
239} /* end dasd_3990_erp_DCTL */
240
241/*
138c014d 242 * DASD_3990_ERP_ACTION_1
1da177e4
LT		 243 *
244 * DESCRIPTION
245 * Setup ERP to do the ERP action 1 (see Reference manual).
246 * Repeat the operation on a different channel path.
eb6e199b
SW		 247 * As deviation from the recommended recovery action, we reset the path mask
248 * after we have tried each path and go through all paths a second time.
249 * This will cover situations where only one path at a time is actually down,
250 * but all paths fail and recover just with the same sequence and timing as
251 * we try to use them (flapping links).
252 * If all alternate paths have been tried twice, the request is posted with
253 * a permanent error.
1da177e4
LT		 254 *
255 * PARAMETER
256 * erp pointer to the current ERP
257 *
258 * RETURN VALUES
259 * erp pointer to the ERP
260 *
261 */
eb6e199b 262static struct dasd_ccw_req *dasd_3990_erp_action_1_sec(struct dasd_ccw_req *erp)
1da177e4 263{
eb6e199b
SW		 264 erp->function = dasd_3990_erp_action_1_sec;
265 dasd_3990_erp_alternate_path(erp);
266 return erp;
267}
1da177e4 268
eb6e199b
SW		 269static struct dasd_ccw_req *dasd_3990_erp_action_1(struct dasd_ccw_req *erp)
270{
1da177e4 271 erp->function = dasd_3990_erp_action_1;
1da177e4 272 dasd_3990_erp_alternate_path(erp);
a4d26c6a
SW		 273 if (erp->status == DASD_CQR_FAILED &&
274 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
eb6e199b
SW		 275 erp->status = DASD_CQR_FILLED;
276 erp->retries = 10;
a4d26c6a 277 erp->lpm = erp->startdev->path_data.opm;
eb6e199b
SW		 278 erp->function = dasd_3990_erp_action_1_sec;
279 }
1da177e4 280 return erp;
eb6e199b 281} /* end dasd_3990_erp_action_1(b) */
1da177e4
LT		 282
283/*
138c014d 284 * DASD_3990_ERP_ACTION_4
1da177e4
LT		 285 *
286 * DESCRIPTION
287 * Setup ERP to do the ERP action 4 (see Reference manual).
288 * Set the current request to PENDING to block the CQR queue for that device
289 * until the state change interrupt appears.
290 * Use a timer (20 seconds) to retry the cqr if the interrupt is still
291 * missing.
292 *
293 * PARAMETER
294 * sense sense data of the actual error
295 * erp pointer to the current ERP
296 *
297 * RETURN VALUES
298 * erp pointer to the ERP
299 *
300 */
301static struct dasd_ccw_req *
302dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense)
303{
304
8e09f215 305 struct dasd_device *device = erp->startdev;
1da177e4
LT		 306
307 /* first time set initial retry counter and erp_function */
308 /* and retry once without waiting for state change pending */
309 /* interrupt (this enables easier enqueing of the cqr) */
310 if (erp->function != dasd_3990_erp_action_4) {
311
fc19f381 312 DBF_DEV_EVENT(DBF_INFO, device, "%s",
1da177e4
LT		 313 "dasd_3990_erp_action_4: first time retry");
314
315 erp->retries = 256;
316 erp->function = dasd_3990_erp_action_4;
317
318 } else {
6c5f57c7 319 if (sense && (sense[25] == 0x1D)) { /* state change pending */
1da177e4 320
fc19f381 321 DBF_DEV_EVENT(DBF_INFO, device,
1da177e4
LT		 322 "waiting for state change pending "
323 "interrupt, %d retries left",
324 erp->retries);
138c014d 325
1da177e4
LT		 326 dasd_3990_erp_block_queue(erp, 30*HZ);
327
6c5f57c7 328 } else if (sense && (sense[25] == 0x1E)) { /* busy */
fc19f381 329 DBF_DEV_EVENT(DBF_INFO, device,
1da177e4
LT		 330 "busy - redriving request later, "
331 "%d retries left",
332 erp->retries);
333 dasd_3990_erp_block_queue(erp, HZ);
334 } else {
1da177e4 335 /* no state change pending - retry */
fc19f381 336 DBF_DEV_EVENT(DBF_INFO, device,
1da177e4 337 "redriving request immediately, "
138c014d 338 "%d retries left",
1da177e4 339 erp->retries);
8e09f215 340 erp->status = DASD_CQR_FILLED;
1da177e4
LT		 341 }
342 }
343
344 return erp;
345
346} /* end dasd_3990_erp_action_4 */
347
348/*
138c014d 349 *****************************************************************************
1da177e4 350 * 24 byte sense ERP functions (only)
138c014d 351 *****************************************************************************
1da177e4
LT		 352 */
353
354/*
138c014d 355 * DASD_3990_ERP_ACTION_5
1da177e4
LT		 356 *
357 * DESCRIPTION
358 * Setup ERP to do the ERP action 5 (see Reference manual).
359 * NOTE: Further handling is done in xxx_further_erp after the retries.
360 *
361 * PARAMETER
362 * erp pointer to the current ERP
363 *
364 * RETURN VALUES
365 * erp pointer to the ERP
366 *
367 */
368static struct dasd_ccw_req *
369dasd_3990_erp_action_5(struct dasd_ccw_req * erp)
370{
371
372 /* first of all retry */
373 erp->retries = 10;
374 erp->function = dasd_3990_erp_action_5;
375
376 return erp;
377
378} /* end dasd_3990_erp_action_5 */
379
380/*
381 * DASD_3990_HANDLE_ENV_DATA
382 *
383 * DESCRIPTION
384 * Handles 24 byte 'Environmental data present'.
385 * Does a analysis of the sense data (message Format)
386 * and prints the error messages.
387 *
388 * PARAMETER
389 * sense current sense data
138c014d 390 *
1da177e4
LT		 391 * RETURN VALUES
392 * void
393 */
394static void
395dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense)
396{
397
8e09f215 398 struct dasd_device *device = erp->startdev;
1da177e4
LT		 399 char msg_format = (sense[7] & 0xF0);
400 char msg_no = (sense[7] & 0x0F);
fc19f381 401 char errorstring[ERRORLENGTH];
1da177e4
LT		 402
403 switch (msg_format) {
404 case 0x00: /* Format 0 - Program or System Checks */
405
406 if (sense[1] & 0x10) { /* check message to operator bit */
407
408 switch (msg_no) {
409 case 0x00: /* No Message */
410 break;
411 case 0x01:
fc19f381
SH		 412 dev_warn(&device->cdev->dev,
413 "FORMAT 0 - Invalid Command\n");
1da177e4
LT		 414 break;
415 case 0x02:
fc19f381 416 dev_warn(&device->cdev->dev,
1da177e4 417 "FORMAT 0 - Invalid Command "
fc19f381 418 "Sequence\n");
1da177e4
LT		 419 break;
420 case 0x03:
fc19f381 421 dev_warn(&device->cdev->dev,
1da177e4 422 "FORMAT 0 - CCW Count less than "
fc19f381 423 "required\n");
1da177e4
LT		 424 break;
425 case 0x04:
fc19f381
SH		 426 dev_warn(&device->cdev->dev,
427 "FORMAT 0 - Invalid Parameter\n");
1da177e4
LT		 428 break;
429 case 0x05:
fc19f381
SH		 430 dev_warn(&device->cdev->dev,
431 "FORMAT 0 - Diagnostic of Special"
432 " Command Violates File Mask\n");
1da177e4
LT		 433 break;
434 case 0x07:
fc19f381 435 dev_warn(&device->cdev->dev,
1da177e4 436 "FORMAT 0 - Channel Returned with "
fc19f381 437 "Incorrect retry CCW\n");
1da177e4
LT		 438 break;
439 case 0x08:
fc19f381
SH		 440 dev_warn(&device->cdev->dev,
441 "FORMAT 0 - Reset Notification\n");
1da177e4
LT		 442 break;
443 case 0x09:
fc19f381
SH		 444 dev_warn(&device->cdev->dev,
445 "FORMAT 0 - Storage Path Restart\n");
1da177e4
LT		 446 break;
447 case 0x0A:
fc19f381 448 dev_warn(&device->cdev->dev,
1da177e4 449 "FORMAT 0 - Channel requested "
fc19f381 450 "... %02x\n", sense[8]);
1da177e4
LT		 451 break;
452 case 0x0B:
fc19f381 453 dev_warn(&device->cdev->dev,
1da177e4 454 "FORMAT 0 - Invalid Defective/"
fc19f381 455 "Alternate Track Pointer\n");
1da177e4
LT		 456 break;
457 case 0x0C:
fc19f381 458 dev_warn(&device->cdev->dev,
1da177e4 459 "FORMAT 0 - DPS Installation "
fc19f381 460 "Check\n");
1da177e4
LT		 461 break;
462 case 0x0E:
fc19f381 463 dev_warn(&device->cdev->dev,
1da177e4 464 "FORMAT 0 - Command Invalid on "
fc19f381 465 "Secondary Address\n");
1da177e4
LT		 466 break;
467 case 0x0F:
fc19f381 468 dev_warn(&device->cdev->dev,
1da177e4 469 "FORMAT 0 - Status Not As "
fc19f381
SH		 470 "Required: reason %02x\n",
471 sense[8]);
1da177e4
LT		 472 break;
473 default:
fc19f381
SH		 474 dev_warn(&device->cdev->dev,
475 "FORMAT 0 - Reserved\n");
1da177e4
LT		 476 }
477 } else {
478 switch (msg_no) {
479 case 0x00: /* No Message */
480 break;
481 case 0x01:
fc19f381
SH		 482 dev_warn(&device->cdev->dev,
483 "FORMAT 0 - Device Error "
484 "Source\n");
1da177e4
LT		 485 break;
486 case 0x02:
fc19f381
SH		 487 dev_warn(&device->cdev->dev,
488 "FORMAT 0 - Reserved\n");
1da177e4
LT		 489 break;
490 case 0x03:
fc19f381 491 dev_warn(&device->cdev->dev,
1da177e4 492 "FORMAT 0 - Device Fenced - "
fc19f381 493 "device = %02x\n", sense[4]);
1da177e4
LT		 494 break;
495 case 0x04:
fc19f381 496 dev_warn(&device->cdev->dev,
1da177e4 497 "FORMAT 0 - Data Pinned for "
fc19f381 498 "Device\n");
1da177e4
LT		 499 break;
500 default:
fc19f381
SH		 501 dev_warn(&device->cdev->dev,
502 "FORMAT 0 - Reserved\n");
1da177e4
LT		 503 }
504 }
505 break;
506
507 case 0x10: /* Format 1 - Device Equipment Checks */
508 switch (msg_no) {
509 case 0x00: /* No Message */
510 break;
511 case 0x01:
fc19f381 512 dev_warn(&device->cdev->dev,
1da177e4 513 "FORMAT 1 - Device Status 1 not as "
fc19f381 514 "expected\n");
1da177e4
LT		 515 break;
516 case 0x03:
fc19f381
SH		 517 dev_warn(&device->cdev->dev,
518 "FORMAT 1 - Index missing\n");
1da177e4
LT		 519 break;
520 case 0x04:
fc19f381
SH		 521 dev_warn(&device->cdev->dev,
522 "FORMAT 1 - Interruption cannot be "
523 "reset\n");
1da177e4
LT		 524 break;
525 case 0x05:
fc19f381 526 dev_warn(&device->cdev->dev,
1da177e4 527 "FORMAT 1 - Device did not respond to "
fc19f381 528 "selection\n");
1da177e4
LT		 529 break;
530 case 0x06:
fc19f381 531 dev_warn(&device->cdev->dev,
1da177e4 532 "FORMAT 1 - Device check-2 error or Set "
fc19f381 533 "Sector is not complete\n");
1da177e4
LT		 534 break;
535 case 0x07:
fc19f381 536 dev_warn(&device->cdev->dev,
1da177e4 537 "FORMAT 1 - Head address does not "
fc19f381 538 "compare\n");
1da177e4
LT		 539 break;
540 case 0x08:
fc19f381
SH		 541 dev_warn(&device->cdev->dev,
542 "FORMAT 1 - Device status 1 not valid\n");
1da177e4
LT		 543 break;
544 case 0x09:
fc19f381
SH		 545 dev_warn(&device->cdev->dev,
546 "FORMAT 1 - Device not ready\n");
1da177e4
LT		 547 break;
548 case 0x0A:
fc19f381 549 dev_warn(&device->cdev->dev,
1da177e4 550 "FORMAT 1 - Track physical address did "
fc19f381 551 "not compare\n");
1da177e4
LT		 552 break;
553 case 0x0B:
fc19f381
SH		 554 dev_warn(&device->cdev->dev,
555 "FORMAT 1 - Missing device address bit\n");
1da177e4
LT		 556 break;
557 case 0x0C:
fc19f381
SH		 558 dev_warn(&device->cdev->dev,
559 "FORMAT 1 - Drive motor switch is off\n");
1da177e4
LT		 560 break;
561 case 0x0D:
fc19f381
SH		 562 dev_warn(&device->cdev->dev,
563 "FORMAT 1 - Seek incomplete\n");
1da177e4
LT		 564 break;
565 case 0x0E:
fc19f381 566 dev_warn(&device->cdev->dev,
1da177e4 567 "FORMAT 1 - Cylinder address did not "
fc19f381 568 "compare\n");
1da177e4
LT		 569 break;
570 case 0x0F:
fc19f381 571 dev_warn(&device->cdev->dev,
1da177e4 572 "FORMAT 1 - Offset active cannot be "
fc19f381 573 "reset\n");
1da177e4
LT		 574 break;
575 default:
fc19f381
SH		 576 dev_warn(&device->cdev->dev,
577 "FORMAT 1 - Reserved\n");
1da177e4
LT		 578 }
579 break;
580
581 case 0x20: /* Format 2 - 3990 Equipment Checks */
582 switch (msg_no) {
583 case 0x08:
fc19f381
SH		 584 dev_warn(&device->cdev->dev,
585 "FORMAT 2 - 3990 check-2 error\n");
1da177e4
LT		 586 break;
587 case 0x0E:
fc19f381
SH		 588 dev_warn(&device->cdev->dev,
589 "FORMAT 2 - Support facility errors\n");
1da177e4
LT		 590 break;
591 case 0x0F:
fc19f381
SH		 592 dev_warn(&device->cdev->dev,
593 "FORMAT 2 - Microcode detected error "
594 "%02x\n",
595 sense[8]);
1da177e4
LT		 596 break;
597 default:
fc19f381
SH		 598 dev_warn(&device->cdev->dev,
599 "FORMAT 2 - Reserved\n");
1da177e4
LT		 600 }
601 break;
602
603 case 0x30: /* Format 3 - 3990 Control Checks */
604 switch (msg_no) {
605 case 0x0F:
fc19f381
SH		 606 dev_warn(&device->cdev->dev,
607 "FORMAT 3 - Allegiance terminated\n");
1da177e4
LT		 608 break;
609 default:
fc19f381
SH		 610 dev_warn(&device->cdev->dev,
611 "FORMAT 3 - Reserved\n");
1da177e4
LT		 612 }
613 break;
614
615 case 0x40: /* Format 4 - Data Checks */
616 switch (msg_no) {
617 case 0x00:
fc19f381
SH		 618 dev_warn(&device->cdev->dev,
619 "FORMAT 4 - Home address area error\n");
1da177e4
LT		 620 break;
621 case 0x01:
fc19f381
SH		 622 dev_warn(&device->cdev->dev,
623 "FORMAT 4 - Count area error\n");
1da177e4
LT		 624 break;
625 case 0x02:
fc19f381
SH		 626 dev_warn(&device->cdev->dev,
627 "FORMAT 4 - Key area error\n");
1da177e4
LT		 628 break;
629 case 0x03:
fc19f381
SH		 630 dev_warn(&device->cdev->dev,
631 "FORMAT 4 - Data area error\n");
1da177e4
LT		 632 break;
633 case 0x04:
fc19f381 634 dev_warn(&device->cdev->dev,
1da177e4 635 "FORMAT 4 - No sync byte in home address "
fc19f381 636 "area\n");
1da177e4
LT		 637 break;
638 case 0x05:
fc19f381 639 dev_warn(&device->cdev->dev,
1da177e4 640 "FORMAT 4 - No sync byte in count address "
fc19f381 641 "area\n");
1da177e4
LT		 642 break;
643 case 0x06:
fc19f381
SH		 644 dev_warn(&device->cdev->dev,
645 "FORMAT 4 - No sync byte in key area\n");
1da177e4
LT		 646 break;
647 case 0x07:
fc19f381
SH		 648 dev_warn(&device->cdev->dev,
649 "FORMAT 4 - No sync byte in data area\n");
1da177e4
LT		 650 break;
651 case 0x08:
fc19f381 652 dev_warn(&device->cdev->dev,
1da177e4 653 "FORMAT 4 - Home address area error; "
fc19f381 654 "offset active\n");
1da177e4
LT		 655 break;
656 case 0x09:
fc19f381 657 dev_warn(&device->cdev->dev,
1da177e4 658 "FORMAT 4 - Count area error; offset "
fc19f381 659 "active\n");
1da177e4
LT		 660 break;
661 case 0x0A:
fc19f381 662 dev_warn(&device->cdev->dev,
1da177e4 663 "FORMAT 4 - Key area error; offset "
fc19f381 664 "active\n");
1da177e4
LT		 665 break;
666 case 0x0B:
fc19f381 667 dev_warn(&device->cdev->dev,
1da177e4 668 "FORMAT 4 - Data area error; "
fc19f381 669 "offset active\n");
1da177e4
LT		 670 break;
671 case 0x0C:
fc19f381 672 dev_warn(&device->cdev->dev,
1da177e4 673 "FORMAT 4 - No sync byte in home "
fc19f381 674 "address area; offset active\n");
1da177e4
LT		 675 break;
676 case 0x0D:
fc19f381 677 dev_warn(&device->cdev->dev,
1da177e4 678 "FORMAT 4 - No syn byte in count "
fc19f381 679 "address area; offset active\n");
1da177e4
LT		 680 break;
681 case 0x0E:
fc19f381 682 dev_warn(&device->cdev->dev,
1da177e4 683 "FORMAT 4 - No sync byte in key area; "
fc19f381 684 "offset active\n");
1da177e4
LT		 685 break;
686 case 0x0F:
fc19f381 687 dev_warn(&device->cdev->dev,
1da177e4 688 "FORMAT 4 - No syn byte in data area; "
fc19f381 689 "offset active\n");
1da177e4
LT		 690 break;
691 default:
fc19f381
SH		 692 dev_warn(&device->cdev->dev,
693 "FORMAT 4 - Reserved\n");
1da177e4
LT		 694 }
695 break;
696
697 case 0x50: /* Format 5 - Data Check with displacement information */
698 switch (msg_no) {
699 case 0x00:
fc19f381 700 dev_warn(&device->cdev->dev,
1da177e4 701 "FORMAT 5 - Data Check in the "
fc19f381 702 "home address area\n");
1da177e4
LT		 703 break;
704 case 0x01:
fc19f381
SH		 705 dev_warn(&device->cdev->dev,
706 "FORMAT 5 - Data Check in the count "
707 "area\n");
1da177e4
LT		 708 break;
709 case 0x02:
fc19f381
SH		 710 dev_warn(&device->cdev->dev,
711 "FORMAT 5 - Data Check in the key area\n");
1da177e4
LT		 712 break;
713 case 0x03:
fc19f381
SH		 714 dev_warn(&device->cdev->dev,
715 "FORMAT 5 - Data Check in the data "
716 "area\n");
1da177e4
LT		 717 break;
718 case 0x08:
fc19f381 719 dev_warn(&device->cdev->dev,
1da177e4 720 "FORMAT 5 - Data Check in the "
fc19f381 721 "home address area; offset active\n");
1da177e4
LT		 722 break;
723 case 0x09:
fc19f381 724 dev_warn(&device->cdev->dev,
1da177e4 725 "FORMAT 5 - Data Check in the count area; "
fc19f381 726 "offset active\n");
1da177e4
LT		 727 break;
728 case 0x0A:
fc19f381 729 dev_warn(&device->cdev->dev,
1da177e4 730 "FORMAT 5 - Data Check in the key area; "
fc19f381 731 "offset active\n");
1da177e4
LT		 732 break;
733 case 0x0B:
fc19f381 734 dev_warn(&device->cdev->dev,
1da177e4 735 "FORMAT 5 - Data Check in the data area; "
fc19f381 736 "offset active\n");
1da177e4
LT		 737 break;
738 default:
fc19f381
SH		 739 dev_warn(&device->cdev->dev,
740 "FORMAT 5 - Reserved\n");
1da177e4
LT		 741 }
742 break;
743
744 case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */
745 switch (msg_no) {
746 case 0x00:
fc19f381
SH		 747 dev_warn(&device->cdev->dev,
748 "FORMAT 6 - Overrun on channel A\n");
1da177e4
LT		 749 break;
750 case 0x01:
fc19f381
SH		 751 dev_warn(&device->cdev->dev,
752 "FORMAT 6 - Overrun on channel B\n");
1da177e4
LT		 753 break;
754 case 0x02:
fc19f381
SH		 755 dev_warn(&device->cdev->dev,
756 "FORMAT 6 - Overrun on channel C\n");
1da177e4
LT		 757 break;
758 case 0x03:
fc19f381
SH		 759 dev_warn(&device->cdev->dev,
760 "FORMAT 6 - Overrun on channel D\n");
1da177e4
LT		 761 break;
762 case 0x04:
fc19f381
SH		 763 dev_warn(&device->cdev->dev,
764 "FORMAT 6 - Overrun on channel E\n");
1da177e4
LT		 765 break;
766 case 0x05:
fc19f381
SH		 767 dev_warn(&device->cdev->dev,
768 "FORMAT 6 - Overrun on channel F\n");
1da177e4
LT		 769 break;
770 case 0x06:
fc19f381
SH		 771 dev_warn(&device->cdev->dev,
772 "FORMAT 6 - Overrun on channel G\n");
1da177e4
LT		 773 break;
774 case 0x07:
fc19f381
SH		 775 dev_warn(&device->cdev->dev,
776 "FORMAT 6 - Overrun on channel H\n");
1da177e4
LT		 777 break;
778 default:
fc19f381
SH		 779 dev_warn(&device->cdev->dev,
780 "FORMAT 6 - Reserved\n");
1da177e4
LT		 781 }
782 break;
783
784 case 0x70: /* Format 7 - Device Connection Control Checks */
785 switch (msg_no) {
786 case 0x00:
fc19f381 787 dev_warn(&device->cdev->dev,
1da177e4 788 "FORMAT 7 - RCC initiated by a connection "
fc19f381 789 "check alert\n");
1da177e4
LT		 790 break;
791 case 0x01:
fc19f381 792 dev_warn(&device->cdev->dev,
1da177e4 793 "FORMAT 7 - RCC 1 sequence not "
fc19f381 794 "successful\n");
1da177e4
LT		 795 break;
796 case 0x02:
fc19f381 797 dev_warn(&device->cdev->dev,
1da177e4 798 "FORMAT 7 - RCC 1 and RCC 2 sequences not "
fc19f381 799 "successful\n");
1da177e4
LT		 800 break;
801 case 0x03:
fc19f381 802 dev_warn(&device->cdev->dev,
1da177e4 803 "FORMAT 7 - Invalid tag-in during "
fc19f381 804 "selection sequence\n");
1da177e4
LT		 805 break;
806 case 0x04:
fc19f381
SH		 807 dev_warn(&device->cdev->dev,
808 "FORMAT 7 - extra RCC required\n");
1da177e4
LT		 809 break;
810 case 0x05:
fc19f381 811 dev_warn(&device->cdev->dev,
1da177e4 812 "FORMAT 7 - Invalid DCC selection "
fc19f381 813 "response or timeout\n");
1da177e4
LT		 814 break;
815 case 0x06:
fc19f381 816 dev_warn(&device->cdev->dev,
1da177e4 817 "FORMAT 7 - Missing end operation; device "
fc19f381 818 "transfer complete\n");
1da177e4
LT		 819 break;
820 case 0x07:
fc19f381 821 dev_warn(&device->cdev->dev,
1da177e4 822 "FORMAT 7 - Missing end operation; device "
fc19f381 823 "transfer incomplete\n");
1da177e4
LT		 824 break;
825 case 0x08:
fc19f381 826 dev_warn(&device->cdev->dev,
1da177e4 827 "FORMAT 7 - Invalid tag-in for an "
fc19f381 828 "immediate command sequence\n");
1da177e4
LT		 829 break;
830 case 0x09:
fc19f381 831 dev_warn(&device->cdev->dev,
1da177e4 832 "FORMAT 7 - Invalid tag-in for an "
fc19f381 833 "extended command sequence\n");
1da177e4
LT		 834 break;
835 case 0x0A:
fc19f381 836 dev_warn(&device->cdev->dev,
1da177e4 837 "FORMAT 7 - 3990 microcode time out when "
fc19f381 838 "stopping selection\n");
1da177e4
LT		 839 break;
840 case 0x0B:
fc19f381 841 dev_warn(&device->cdev->dev,
1da177e4 842 "FORMAT 7 - No response to selection "
fc19f381 843 "after a poll interruption\n");
1da177e4
LT		 844 break;
845 case 0x0C:
fc19f381 846 dev_warn(&device->cdev->dev,
1da177e4 847 "FORMAT 7 - Permanent path error (DASD "
fc19f381 848 "controller not available)\n");
1da177e4
LT		 849 break;
850 case 0x0D:
fc19f381 851 dev_warn(&device->cdev->dev,
1da177e4 852 "FORMAT 7 - DASD controller not available"
fc19f381 853 " on disconnected command chain\n");
1da177e4
LT		 854 break;
855 default:
fc19f381
SH		 856 dev_warn(&device->cdev->dev,
857 "FORMAT 7 - Reserved\n");
1da177e4
LT		 858 }
859 break;
860
861 case 0x80: /* Format 8 - Additional Device Equipment Checks */
862 switch (msg_no) {
863 case 0x00: /* No Message */
864 case 0x01:
fc19f381 865 dev_warn(&device->cdev->dev,
1da177e4 866 "FORMAT 8 - Error correction code "
fc19f381 867 "hardware fault\n");
1da177e4
LT		 868 break;
869 case 0x03:
fc19f381 870 dev_warn(&device->cdev->dev,
1da177e4 871 "FORMAT 8 - Unexpected end operation "
fc19f381 872 "response code\n");
1da177e4
LT		 873 break;
874 case 0x04:
fc19f381 875 dev_warn(&device->cdev->dev,
1da177e4 876 "FORMAT 8 - End operation with transfer "
fc19f381 877 "count not zero\n");
1da177e4
LT		 878 break;
879 case 0x05:
fc19f381 880 dev_warn(&device->cdev->dev,
1da177e4 881 "FORMAT 8 - End operation with transfer "
fc19f381 882 "count zero\n");
1da177e4
LT		 883 break;
884 case 0x06:
fc19f381 885 dev_warn(&device->cdev->dev,
1da177e4 886 "FORMAT 8 - DPS checks after a system "
fc19f381 887 "reset or selective reset\n");
1da177e4
LT		 888 break;
889 case 0x07:
fc19f381
SH		 890 dev_warn(&device->cdev->dev,
891 "FORMAT 8 - DPS cannot be filled\n");
1da177e4
LT		 892 break;
893 case 0x08:
fc19f381 894 dev_warn(&device->cdev->dev,
1da177e4 895 "FORMAT 8 - Short busy time-out during "
fc19f381 896 "device selection\n");
1da177e4
LT		 897 break;
898 case 0x09:
fc19f381 899 dev_warn(&device->cdev->dev,
1da177e4 900 "FORMAT 8 - DASD controller failed to "
fc19f381 901 "set or reset the long busy latch\n");
1da177e4
LT		 902 break;
903 case 0x0A:
fc19f381 904 dev_warn(&device->cdev->dev,
1da177e4 905 "FORMAT 8 - No interruption from device "
fc19f381 906 "during a command chain\n");
1da177e4
LT		 907 break;
908 default:
fc19f381
SH		 909 dev_warn(&device->cdev->dev,
910 "FORMAT 8 - Reserved\n");
1da177e4
LT		 911 }
912 break;
913
914 case 0x90: /* Format 9 - Device Read, Write, and Seek Checks */
915 switch (msg_no) {
916 case 0x00:
917 break; /* No Message */
918 case 0x06:
fc19f381
SH		 919 dev_warn(&device->cdev->dev,
920 "FORMAT 9 - Device check-2 error\n");
1da177e4
LT		 921 break;
922 case 0x07:
fc19f381
SH		 923 dev_warn(&device->cdev->dev,
924 "FORMAT 9 - Head address did not "
925 "compare\n");
1da177e4
LT		 926 break;
927 case 0x0A:
fc19f381 928 dev_warn(&device->cdev->dev,
1da177e4 929 "FORMAT 9 - Track physical address did "
fc19f381 930 "not compare while oriented\n");
1da177e4
LT		 931 break;
932 case 0x0E:
fc19f381 933 dev_warn(&device->cdev->dev,
1da177e4 934 "FORMAT 9 - Cylinder address did not "
fc19f381 935 "compare\n");
1da177e4
LT		 936 break;
937 default:
fc19f381
SH		 938 dev_warn(&device->cdev->dev,
939 "FORMAT 9 - Reserved\n");
1da177e4
LT		 940 }
941 break;
942
943 case 0xF0: /* Format F - Cache Storage Checks */
944 switch (msg_no) {
945 case 0x00:
fc19f381
SH		 946 dev_warn(&device->cdev->dev,
947 "FORMAT F - Operation Terminated\n");
1da177e4
LT		 948 break;
949 case 0x01:
fc19f381
SH		 950 dev_warn(&device->cdev->dev,
951 "FORMAT F - Subsystem Processing Error\n");
1da177e4
LT		 952 break;
953 case 0x02:
fc19f381 954 dev_warn(&device->cdev->dev,
1da177e4 955 "FORMAT F - Cache or nonvolatile storage "
fc19f381 956 "equipment failure\n");
1da177e4
LT		 957 break;
958 case 0x04:
fc19f381
SH		 959 dev_warn(&device->cdev->dev,
960 "FORMAT F - Caching terminated\n");
1da177e4
LT		 961 break;
962 case 0x06:
fc19f381 963 dev_warn(&device->cdev->dev,
1da177e4 964 "FORMAT F - Cache fast write access not "
fc19f381 965 "authorized\n");
1da177e4
LT		 966 break;
967 case 0x07:
fc19f381
SH		 968 dev_warn(&device->cdev->dev,
969 "FORMAT F - Track format incorrect\n");
1da177e4
LT		 970 break;
971 case 0x09:
fc19f381
SH		 972 dev_warn(&device->cdev->dev,
973 "FORMAT F - Caching reinitiated\n");
1da177e4
LT		 974 break;
975 case 0x0A:
fc19f381 976 dev_warn(&device->cdev->dev,
1da177e4 977 "FORMAT F - Nonvolatile storage "
fc19f381 978 "terminated\n");
1da177e4
LT		 979 break;
980 case 0x0B:
fc19f381
SH		 981 dev_warn(&device->cdev->dev,
982 "FORMAT F - Volume is suspended duplex\n");
20c64468
SW		 983 /* call extended error reporting (EER) */
984 dasd_eer_write(device, erp->refers,
985 DASD_EER_PPRCSUSPEND);
1da177e4
LT		 986 break;
987 case 0x0C:
fc19f381
SH		 988 dev_warn(&device->cdev->dev,
989 "FORMAT F - Subsystem status cannot be "
990 "determined\n");
1da177e4
LT		 991 break;
992 case 0x0D:
fc19f381 993 dev_warn(&device->cdev->dev,
1da177e4 994 "FORMAT F - Caching status reset to "
fc19f381 995 "default\n");
1da177e4
LT		 996 break;
997 case 0x0E:
fc19f381
SH		 998 dev_warn(&device->cdev->dev,
999 "FORMAT F - DASD Fast Write inhibited\n");
1da177e4
LT		 1000 break;
1001 default:
fc19f381
SH		 1002 dev_warn(&device->cdev->dev,
1003 "FORMAT D - Reserved\n");
1da177e4
LT		 1004 }
1005 break;
1006
fc19f381
SH		 1007 default: /* unknown message format - should not happen
1008 internal error 03 - unknown message format */
1009 snprintf(errorstring, ERRORLENGTH, "03 %x02", msg_format);
1010 dev_err(&device->cdev->dev,
1011 "An error occurred in the DASD device driver, "
1012 "reason=%s\n", errorstring);
1da177e4
LT		 1013 break;
1014 } /* end switch message format */
1015
1016} /* end dasd_3990_handle_env_data */
1017
1018/*
1019 * DASD_3990_ERP_COM_REJ
1020 *
1021 * DESCRIPTION
1022 * Handles 24 byte 'Command Reject' error.
1023 *
1024 * PARAMETER
1025 * erp current erp_head
1026 * sense current sense data
138c014d 1027 *
1da177e4 1028 * RETURN VALUES
138c014d 1029 * erp 'new' erp_head - pointer to new ERP
1da177e4
LT		 1030 */
1031static struct dasd_ccw_req *
1032dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense)
1033{
1034
8e09f215 1035 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1036
1037 erp->function = dasd_3990_erp_com_rej;
1038
1039 /* env data present (ACTION 10 - retry should work) */
1040 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1041
fc19f381 1042 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1043 "Command Reject - environmental data present");
1044
1045 dasd_3990_handle_env_data(erp, sense);
1046
1047 erp->retries = 5;
1048
33b62a30
SW		 1049 } else if (sense[1] & SNS1_WRITE_INHIBITED) {
1050 dev_err(&device->cdev->dev, "An I/O request was rejected"
1051 " because writing is inhibited\n");
1052 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1da177e4 1053 } else {
fc19f381
SH		 1054 /* fatal error - set status to FAILED
1055 internal error 09 - Command Reject */
1056 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1057 "device driver, reason=%s\n", "09");
1da177e4
LT		 1058
1059 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1060 }
1061
1062 return erp;
1063
1064} /* end dasd_3990_erp_com_rej */
1065
1066/*
138c014d 1067 * DASD_3990_ERP_BUS_OUT
1da177e4
LT		 1068 *
1069 * DESCRIPTION
1070 * Handles 24 byte 'Bus Out Parity Check' error.
1071 *
1072 * PARAMETER
1073 * erp current erp_head
1074 * RETURN VALUES
1075 * erp new erp_head - pointer to new ERP
1076 */
1077static struct dasd_ccw_req *
1078dasd_3990_erp_bus_out(struct dasd_ccw_req * erp)
1079{
1080
8e09f215 1081 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1082
1083 /* first time set initial retry counter and erp_function */
1084 /* and retry once without blocking queue */
1085 /* (this enables easier enqueing of the cqr) */
1086 if (erp->function != dasd_3990_erp_bus_out) {
1087 erp->retries = 256;
1088 erp->function = dasd_3990_erp_bus_out;
1089
1090 } else {
1091
1092 /* issue a message and wait for 'device ready' interrupt */
fc19f381 1093 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1094 "bus out parity error or BOPC requested by "
1095 "channel");
1096
1097 dasd_3990_erp_block_queue(erp, 60*HZ);
1098
1099 }
1100
1101 return erp;
1102
1103} /* end dasd_3990_erp_bus_out */
1104
1105/*
1106 * DASD_3990_ERP_EQUIP_CHECK
1107 *
1108 * DESCRIPTION
1109 * Handles 24 byte 'Equipment Check' error.
1110 *
1111 * PARAMETER
1112 * erp current erp_head
1113 * RETURN VALUES
1114 * erp new erp_head - pointer to new ERP
1115 */
1116static struct dasd_ccw_req *
1117dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense)
1118{
1119
8e09f215 1120 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1121
1122 erp->function = dasd_3990_erp_equip_check;
1123
1124 if (sense[1] & SNS1_WRITE_INHIBITED) {
fc19f381
SH		 1125 dev_info(&device->cdev->dev,
1126 "Write inhibited path encountered\n");
1da177e4 1127
fc19f381
SH		 1128 /* vary path offline
1129 internal error 04 - Path should be varied off-line.*/
1130 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1131 "device driver, reason=%s\n", "04");
1da177e4
LT		 1132
1133 erp = dasd_3990_erp_action_1(erp);
1134
1135 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1136
fc19f381 1137 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1138 "Equipment Check - " "environmental data present");
1139
1140 dasd_3990_handle_env_data(erp, sense);
1141
1142 erp = dasd_3990_erp_action_4(erp, sense);
1143
1144 } else if (sense[1] & SNS1_PERM_ERR) {
1145
fc19f381 1146 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1147 "Equipment Check - retry exhausted or "
1148 "undesirable");
1149
1150 erp = dasd_3990_erp_action_1(erp);
1151
1152 } else {
1153 /* all other equipment checks - Action 5 */
1154 /* rest is done when retries == 0 */
fc19f381 1155 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1156 "Equipment check or processing error");
1157
1158 erp = dasd_3990_erp_action_5(erp);
1159 }
1da177e4
LT		 1160 return erp;
1161
1162} /* end dasd_3990_erp_equip_check */
1163
1164/*
1165 * DASD_3990_ERP_DATA_CHECK
1166 *
1167 * DESCRIPTION
1168 * Handles 24 byte 'Data Check' error.
1169 *
1170 * PARAMETER
1171 * erp current erp_head
1172 * RETURN VALUES
1173 * erp new erp_head - pointer to new ERP
1174 */
1175static struct dasd_ccw_req *
1176dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense)
1177{
1178
8e09f215 1179 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1180
1181 erp->function = dasd_3990_erp_data_check;
1182
1183 if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */
1184
1185 /* issue message that the data has been corrected */
fc19f381 1186 dev_emerg(&device->cdev->dev,
1da177e4 1187 "Data recovered during retry with PCI "
fc19f381 1188 "fetch mode active\n");
1da177e4
LT		 1189
1190 /* not possible to handle this situation in Linux */
1191 panic("No way to inform application about the possibly "
1192 "incorrect data");
1193
1194 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1195
fc19f381 1196 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1197 "Uncorrectable data check recovered secondary "
1198 "addr of duplex pair");
1199
1200 erp = dasd_3990_erp_action_4(erp, sense);
1201
1202 } else if (sense[1] & SNS1_PERM_ERR) {
1203
fc19f381 1204 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1205 "Uncorrectable data check with internal "
1206 "retry exhausted");
1207
1208 erp = dasd_3990_erp_action_1(erp);
1209
1210 } else {
1211 /* all other data checks */
fc19f381 1212 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1213 "Uncorrectable data check with retry count "
1214 "exhausted...");
1215
1216 erp = dasd_3990_erp_action_5(erp);
1217 }
1218
1219 return erp;
1220
1221} /* end dasd_3990_erp_data_check */
1222
1223/*
1224 * DASD_3990_ERP_OVERRUN
1225 *
1226 * DESCRIPTION
1227 * Handles 24 byte 'Overrun' error.
1228 *
1229 * PARAMETER
1230 * erp current erp_head
1231 * RETURN VALUES
1232 * erp new erp_head - pointer to new ERP
1233 */
1234static struct dasd_ccw_req *
1235dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense)
1236{
1237
8e09f215 1238 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1239
1240 erp->function = dasd_3990_erp_overrun;
1241
fc19f381 1242 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1243 "Overrun - service overrun or overrun"
1244 " error requested by channel");
1245
1246 erp = dasd_3990_erp_action_5(erp);
1247
1248 return erp;
1249
1250} /* end dasd_3990_erp_overrun */
1251
1252/*
1253 * DASD_3990_ERP_INV_FORMAT
1254 *
1255 * DESCRIPTION
1256 * Handles 24 byte 'Invalid Track Format' error.
1257 *
1258 * PARAMETER
1259 * erp current erp_head
1260 * RETURN VALUES
1261 * erp new erp_head - pointer to new ERP
1262 */
1263static struct dasd_ccw_req *
1264dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense)
1265{
1266
8e09f215 1267 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1268
1269 erp->function = dasd_3990_erp_inv_format;
1270
1271 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1272
fc19f381 1273 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1274 "Track format error when destaging or "
1275 "staging data");
1276
1277 dasd_3990_handle_env_data(erp, sense);
1278
1279 erp = dasd_3990_erp_action_4(erp, sense);
1280
1281 } else {
fc19f381
SH		 1282 /* internal error 06 - The track format is not valid*/
1283 dev_err(&device->cdev->dev,
1284 "An error occurred in the DASD device driver, "
1285 "reason=%s\n", "06");
1da177e4
LT		 1286
1287 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1288 }
1289
1290 return erp;
1291
1292} /* end dasd_3990_erp_inv_format */
1293
1294/*
1295 * DASD_3990_ERP_EOC
1296 *
1297 * DESCRIPTION
1298 * Handles 24 byte 'End-of-Cylinder' error.
1299 *
1300 * PARAMETER
1301 * erp already added default erp
1302 * RETURN VALUES
1303 * erp pointer to original (failed) cqr.
1304 */
1305static struct dasd_ccw_req *
1306dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense)
1307{
1308
8e09f215 1309 struct dasd_device *device = default_erp->startdev;
1da177e4 1310
fc19f381
SH		 1311 dev_err(&device->cdev->dev,
1312 "The cylinder data for accessing the DASD is inconsistent\n");
1da177e4
LT		 1313
1314 /* implement action 7 - BUG */
1315 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1316
1317} /* end dasd_3990_erp_EOC */
1318
1319/*
1320 * DASD_3990_ERP_ENV_DATA
1321 *
1322 * DESCRIPTION
1323 * Handles 24 byte 'Environmental-Data Present' error.
1324 *
1325 * PARAMETER
1326 * erp current erp_head
1327 * RETURN VALUES
1328 * erp new erp_head - pointer to new ERP
1329 */
1330static struct dasd_ccw_req *
1331dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense)
1332{
1333
8e09f215 1334 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1335
1336 erp->function = dasd_3990_erp_env_data;
1337
fc19f381 1338 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Environmental data present");
1da177e4
LT		 1339
1340 dasd_3990_handle_env_data(erp, sense);
1341
1342 /* don't retry on disabled interface */
1343 if (sense[7] != 0x0F) {
1da177e4
LT		 1344 erp = dasd_3990_erp_action_4(erp, sense);
1345 } else {
8e09f215 1346 erp->status = DASD_CQR_FILLED;
1da177e4
LT		 1347 }
1348
1349 return erp;
1350
1351} /* end dasd_3990_erp_env_data */
1352
1353/*
1354 * DASD_3990_ERP_NO_REC
1355 *
1356 * DESCRIPTION
1357 * Handles 24 byte 'No Record Found' error.
1358 *
1359 * PARAMETER
1360 * erp already added default ERP
138c014d 1361 *
1da177e4
LT		 1362 * RETURN VALUES
1363 * erp new erp_head - pointer to new ERP
1364 */
1365static struct dasd_ccw_req *
1366dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense)
1367{
1368
8e09f215 1369 struct dasd_device *device = default_erp->startdev;
1da177e4 1370
fc19f381
SH		 1371 dev_err(&device->cdev->dev,
1372 "The specified record was not found\n");
1da177e4
LT		 1373
1374 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1375
1376} /* end dasd_3990_erp_no_rec */
1377
1378/*
1379 * DASD_3990_ERP_FILE_PROT
1380 *
1381 * DESCRIPTION
1382 * Handles 24 byte 'File Protected' error.
1383 * Note: Seek related recovery is not implemented because
1384 * wee don't use the seek command yet.
1385 *
1386 * PARAMETER
1387 * erp current erp_head
1388 * RETURN VALUES
1389 * erp new erp_head - pointer to new ERP
1390 */
1391static struct dasd_ccw_req *
1392dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
1393{
1394
8e09f215 1395 struct dasd_device *device = erp->startdev;
1da177e4 1396
fc19f381
SH		 1397 dev_err(&device->cdev->dev, "Accessing the DASD failed because of "
1398 "a hardware error\n");
1da177e4
LT		 1399
1400 return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1401
1402} /* end dasd_3990_erp_file_prot */
1403
8e09f215
SW		 1404/*
1405 * DASD_3990_ERP_INSPECT_ALIAS
1406 *
1407 * DESCRIPTION
1408 * Checks if the original request was started on an alias device.
1409 * If yes, it modifies the original and the erp request so that
1410 * the erp request can be started on a base device.
1411 *
1412 * PARAMETER
1413 * erp pointer to the currently created default ERP
1414 *
1415 * RETURN VALUES
1416 * erp pointer to the modified ERP, or NULL
1417 */
1418
1419static struct dasd_ccw_req *dasd_3990_erp_inspect_alias(
1420 struct dasd_ccw_req *erp)
1421{
1422 struct dasd_ccw_req *cqr = erp->refers;
501183f2 1423 char *sense;
8e09f215
SW		 1424
1425 if (cqr->block &&
1426 (cqr->block->base != cqr->startdev)) {
501183f2
SH		 1427
1428 sense = dasd_get_sense(&erp->refers->irb);
1429 /*
1430 * dynamic pav may have changed base alias mapping
1431 */
1432 if (!test_bit(DASD_FLAG_OFFLINE, &cqr->startdev->flags) && sense
1433 && (sense[0] == 0x10) && (sense[7] == 0x0F)
1434 && (sense[8] == 0x67)) {
1435 /*
1436 * remove device from alias handling to prevent new
1437 * requests from being scheduled on the
1438 * wrong alias device
1439 */
1440 dasd_alias_remove_device(cqr->startdev);
1441
1442 /* schedule worker to reload device */
1443 dasd_reload_device(cqr->startdev);
1444 }
1445
8e09f215 1446 if (cqr->startdev->features & DASD_FEATURE_ERPLOG) {
fc19f381 1447 DBF_DEV_EVENT(DBF_ERR, cqr->startdev,
8e09f215
SW		 1448 "ERP on alias device for request %p,"
1449 " recover on base device %s", cqr,
2a0217d5 1450 dev_name(&cqr->block->base->cdev->dev));
8e09f215
SW		 1451 }
1452 dasd_eckd_reset_ccw_to_base_io(cqr);
1453 erp->startdev = cqr->block->base;
1454 erp->function = dasd_3990_erp_inspect_alias;
1455 return erp;
1456 } else
1457 return NULL;
1458}
1459
1460
1da177e4 1461/*
138c014d 1462 * DASD_3990_ERP_INSPECT_24
1da177e4
LT		 1463 *
1464 * DESCRIPTION
1465 * Does a detailed inspection of the 24 byte sense data
138c014d 1466 * and sets up a related error recovery action.
1da177e4
LT		 1467 *
1468 * PARAMETER
1469 * sense sense data of the actual error
1470 * erp pointer to the currently created default ERP
1471 *
1472 * RETURN VALUES
1473 * erp pointer to the (addtitional) ERP
1474 */
1475static struct dasd_ccw_req *
1476dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense)
1477{
1478
1479 struct dasd_ccw_req *erp_filled = NULL;
1480
1481 /* Check sense for .... */
1482 /* 'Command Reject' */
1483 if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) {
1484 erp_filled = dasd_3990_erp_com_rej(erp, sense);
1485 }
1486 /* 'Intervention Required' */
1487 if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) {
1488 erp_filled = dasd_3990_erp_int_req(erp);
1489 }
1490 /* 'Bus Out Parity Check' */
1491 if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) {
1492 erp_filled = dasd_3990_erp_bus_out(erp);
1493 }
1494 /* 'Equipment Check' */
1495 if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) {
1496 erp_filled = dasd_3990_erp_equip_check(erp, sense);
1497 }
1498 /* 'Data Check' */
1499 if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) {
1500 erp_filled = dasd_3990_erp_data_check(erp, sense);
1501 }
1502 /* 'Overrun' */
1503 if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) {
1504 erp_filled = dasd_3990_erp_overrun(erp, sense);
1505 }
1506 /* 'Invalid Track Format' */
1507 if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) {
1508 erp_filled = dasd_3990_erp_inv_format(erp, sense);
1509 }
1510 /* 'End-of-Cylinder' */
1511 if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) {
1512 erp_filled = dasd_3990_erp_EOC(erp, sense);
1513 }
1514 /* 'Environmental Data' */
1515 if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) {
1516 erp_filled = dasd_3990_erp_env_data(erp, sense);
1517 }
1518 /* 'No Record Found' */
1519 if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) {
1520 erp_filled = dasd_3990_erp_no_rec(erp, sense);
1521 }
1522 /* 'File Protected' */
1523 if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) {
1524 erp_filled = dasd_3990_erp_file_prot(erp);
1525 }
1526 /* other (unknown) error - do default ERP */
1527 if (erp_filled == NULL) {
1528
1529 erp_filled = erp;
1530 }
1531
1532 return erp_filled;
1533
1534} /* END dasd_3990_erp_inspect_24 */
1535
1536/*
138c014d 1537 *****************************************************************************
1da177e4 1538 * 32 byte sense ERP functions (only)
138c014d 1539 *****************************************************************************
1da177e4
LT		 1540 */
1541
1542/*
138c014d 1543 * DASD_3990_ERPACTION_10_32
1da177e4
LT		 1544 *
1545 * DESCRIPTION
1546 * Handles 32 byte 'Action 10' of Single Program Action Codes.
1547 * Just retry and if retry doesn't work, return with error.
1548 *
1549 * PARAMETER
1550 * erp current erp_head
138c014d 1551 * sense current sense data
1da177e4
LT		 1552 * RETURN VALUES
1553 * erp modified erp_head
1554 */
1555static struct dasd_ccw_req *
1556dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense)
1557{
1558
8e09f215 1559 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1560
1561 erp->retries = 256;
1562 erp->function = dasd_3990_erp_action_10_32;
1563
fc19f381 1564 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Perform logging requested");
1da177e4
LT		 1565
1566 return erp;
1567
1568} /* end dasd_3990_erp_action_10_32 */
1569
1570/*
1571 * DASD_3990_ERP_ACTION_1B_32
1572 *
1573 * DESCRIPTION
1574 * Handles 32 byte 'Action 1B' of Single Program Action Codes.
138c014d 1575 * A write operation could not be finished because of an unexpected
1da177e4 1576 * condition.
138c014d
HH		 1577 * The already created 'default erp' is used to get the link to
1578 * the erp chain, but it can not be used for this recovery
1da177e4
LT		 1579 * action because it contains no DE/LO data space.
1580 *
1581 * PARAMETER
1582 * default_erp already added default erp.
138c014d 1583 * sense current sense data
1da177e4
LT		 1584 *
1585 * RETURN VALUES
138c014d 1586 * erp new erp or
1da177e4
LT		 1587 * default_erp in case of imprecise ending or error
1588 */
1589static struct dasd_ccw_req *
1590dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1591{
1592
8e09f215 1593 struct dasd_device *device = default_erp->startdev;
1da177e4
LT		 1594 __u32 cpa = 0;
1595 struct dasd_ccw_req *cqr;
1596 struct dasd_ccw_req *erp;
1597 struct DE_eckd_data *DE_data;
8e09f215 1598 struct PFX_eckd_data *PFX_data;
1da177e4 1599 char *LO_data; /* LO_eckd_data_t */
8e09f215 1600 struct ccw1 *ccw, *oldccw;
1da177e4 1601
fc19f381 1602 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1603 "Write not finished because of unexpected condition");
1604
1605 default_erp->function = dasd_3990_erp_action_1B_32;
1606
1607 /* determine the original cqr */
1608 cqr = default_erp;
1609
1610 while (cqr->refers != NULL) {
1611 cqr = cqr->refers;
1612 }
1613
f3eb5384
SW		 1614 if (scsw_is_tm(&cqr->irb.scsw)) {
1615 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1616 "32 bit sense, action 1B is not defined"
1617 " in transport mode - just retry");
1618 return default_erp;
1619 }
1620
1da177e4
LT		 1621 /* for imprecise ending just do default erp */
1622 if (sense[1] & 0x01) {
fc19f381 1623 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1624 "Imprecise ending is set - just retry");
1625
1626 return default_erp;
1627 }
1628
1629 /* determine the address of the CCW to be restarted */
1630 /* Imprecise ending is not set -> addr from IRB-SCSW */
23d805b6 1631 cpa = default_erp->refers->irb.scsw.cmd.cpa;
1da177e4
LT		 1632
1633 if (cpa == 0) {
fc19f381 1634 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1635 "Unable to determine address of the CCW "
1636 "to be restarted");
1637
1638 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1639 }
1640
1641 /* Build new ERP request including DE/LO */
1642 erp = dasd_alloc_erp_request((char *) &cqr->magic,
1643 2 + 1,/* DE/LO + TIC */
8e09f215
SW		 1644 sizeof(struct DE_eckd_data) +
1645 sizeof(struct LO_eckd_data), device);
1da177e4
LT		 1646
1647 if (IS_ERR(erp)) {
fc19f381
SH		 1648 /* internal error 01 - Unable to allocate ERP */
1649 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1650 "device driver, reason=%s\n", "01");
1da177e4
LT		 1651 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1652 }
1653
1654 /* use original DE */
1655 DE_data = erp->data;
8e09f215
SW		 1656 oldccw = cqr->cpaddr;
1657 if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) {
1658 PFX_data = cqr->data;
f3eb5384 1659 memcpy(DE_data, &PFX_data->define_extent,
8e09f215
SW		 1660 sizeof(struct DE_eckd_data));
1661 } else
1662 memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data));
1da177e4
LT		 1663
1664 /* create LO */
8e09f215 1665 LO_data = erp->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1666
1667 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
fc19f381 1668 /* should not */
1da177e4
LT		 1669 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1670 }
1671
1672 if ((sense[7] & 0x3F) == 0x01) {
1673 /* operation code is WRITE DATA -> data area orientation */
1674 LO_data[0] = 0x81;
1675
1676 } else if ((sense[7] & 0x3F) == 0x03) {
1677 /* operation code is FORMAT WRITE -> index orientation */
1678 LO_data[0] = 0xC3;
1679
1680 } else {
1681 LO_data[0] = sense[7]; /* operation */
1682 }
1683
1684 LO_data[1] = sense[8]; /* auxiliary */
1685 LO_data[2] = sense[9];
1686 LO_data[3] = sense[3]; /* count */
1687 LO_data[4] = sense[29]; /* seek_addr.cyl */
1688 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1689 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1690
1691 memcpy(&(LO_data[8]), &(sense[11]), 8);
1692
1693 /* create DE ccw */
1694 ccw = erp->cpaddr;
8e09f215 1695 memset(ccw, 0, sizeof(struct ccw1));
1da177e4
LT		 1696 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
1697 ccw->flags = CCW_FLAG_CC;
1698 ccw->count = 16;
1699 ccw->cda = (__u32)(addr_t) DE_data;
1700
1701 /* create LO ccw */
1702 ccw++;
8e09f215 1703 memset(ccw, 0, sizeof(struct ccw1));
1da177e4
LT		 1704 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
1705 ccw->flags = CCW_FLAG_CC;
1706 ccw->count = 16;
1707 ccw->cda = (__u32)(addr_t) LO_data;
1708
1709 /* TIC to the failed ccw */
1710 ccw++;
1711 ccw->cmd_code = CCW_CMD_TIC;
1712 ccw->cda = cpa;
1713
1714 /* fill erp related fields */
7ea8d321 1715 erp->flags = default_erp->flags;
1da177e4
LT		 1716 erp->function = dasd_3990_erp_action_1B_32;
1717 erp->refers = default_erp->refers;
8e09f215
SW		 1718 erp->startdev = device;
1719 erp->memdev = device;
1da177e4
LT		 1720 erp->magic = default_erp->magic;
1721 erp->expires = 0;
1722 erp->retries = 256;
1723 erp->buildclk = get_clock();
1724 erp->status = DASD_CQR_FILLED;
1725
1726 /* remove the default erp */
1727 dasd_free_erp_request(default_erp, device);
1728
1729 return erp;
1730
1731} /* end dasd_3990_erp_action_1B_32 */
1732
1733/*
1734 * DASD_3990_UPDATE_1B
1735 *
1736 * DESCRIPTION
138c014d 1737 * Handles the update to the 32 byte 'Action 1B' of Single Program
1da177e4
LT		 1738 * Action Codes in case the first action was not successful.
1739 * The already created 'previous_erp' is the currently not successful
138c014d 1740 * ERP.
1da177e4
LT		 1741 *
1742 * PARAMETER
1743 * previous_erp already created previous erp.
138c014d 1744 * sense current sense data
1da177e4 1745 * RETURN VALUES
138c014d 1746 * erp modified erp
1da177e4
LT		 1747 */
1748static struct dasd_ccw_req *
1749dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
1750{
1751
8e09f215 1752 struct dasd_device *device = previous_erp->startdev;
1da177e4
LT		 1753 __u32 cpa = 0;
1754 struct dasd_ccw_req *cqr;
1755 struct dasd_ccw_req *erp;
1756 char *LO_data; /* struct LO_eckd_data */
1757 struct ccw1 *ccw;
1758
fc19f381 1759 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1760 "Write not finished because of unexpected condition"
1761 " - follow on");
1762
1763 /* determine the original cqr */
1764 cqr = previous_erp;
1765
1766 while (cqr->refers != NULL) {
1767 cqr = cqr->refers;
1768 }
1769
f3eb5384
SW		 1770 if (scsw_is_tm(&cqr->irb.scsw)) {
1771 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1772 "32 bit sense, action 1B, update,"
1773 " in transport mode - just retry");
1774 return previous_erp;
1775 }
1776
1da177e4
LT		 1777 /* for imprecise ending just do default erp */
1778 if (sense[1] & 0x01) {
fc19f381 1779 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1780 "Imprecise ending is set - just retry");
1781
8e09f215 1782 previous_erp->status = DASD_CQR_FILLED;
1da177e4
LT		 1783
1784 return previous_erp;
1785 }
1786
1787 /* determine the address of the CCW to be restarted */
1788 /* Imprecise ending is not set -> addr from IRB-SCSW */
23d805b6 1789 cpa = previous_erp->irb.scsw.cmd.cpa;
1da177e4
LT		 1790
1791 if (cpa == 0) {
fc19f381
SH		 1792 /* internal error 02 -
1793 Unable to determine address of the CCW to be restarted */
1794 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1795 "device driver, reason=%s\n", "02");
1da177e4
LT		 1796
1797 previous_erp->status = DASD_CQR_FAILED;
1798
1799 return previous_erp;
1800 }
1801
1802 erp = previous_erp;
1803
1804 /* update the LO with the new returned sense data */
8e09f215 1805 LO_data = erp->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1806
1807 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
fc19f381 1808 /* should not happen */
1da177e4
LT		 1809 previous_erp->status = DASD_CQR_FAILED;
1810
1811 return previous_erp;
1812 }
1813
1814 if ((sense[7] & 0x3F) == 0x01) {
1815 /* operation code is WRITE DATA -> data area orientation */
1816 LO_data[0] = 0x81;
1817
1818 } else if ((sense[7] & 0x3F) == 0x03) {
1819 /* operation code is FORMAT WRITE -> index orientation */
1820 LO_data[0] = 0xC3;
1821
1822 } else {
1823 LO_data[0] = sense[7]; /* operation */
1824 }
1825
1826 LO_data[1] = sense[8]; /* auxiliary */
1827 LO_data[2] = sense[9];
1828 LO_data[3] = sense[3]; /* count */
1829 LO_data[4] = sense[29]; /* seek_addr.cyl */
1830 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1831 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1832
1833 memcpy(&(LO_data[8]), &(sense[11]), 8);
1834
1835 /* TIC to the failed ccw */
1836 ccw = erp->cpaddr; /* addr of DE ccw */
1837 ccw++; /* addr of LE ccw */
1838 ccw++; /* addr of TIC ccw */
1839 ccw->cda = cpa;
1840
8e09f215 1841 erp->status = DASD_CQR_FILLED;
1da177e4
LT		 1842
1843 return erp;
1844
1845} /* end dasd_3990_update_1B */
1846
1847/*
138c014d 1848 * DASD_3990_ERP_COMPOUND_RETRY
1da177e4
LT		 1849 *
1850 * DESCRIPTION
1851 * Handles the compound ERP action retry code.
1852 * NOTE: At least one retry is done even if zero is specified
1853 * by the sense data. This makes enqueueing of the request
1854 * easier.
1855 *
1856 * PARAMETER
1857 * sense sense data of the actual error
1858 * erp pointer to the currently created ERP
1859 *
1860 * RETURN VALUES
1861 * erp modified ERP pointer
1862 *
1863 */
1864static void
1865dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense)
1866{
1867
1868 switch (sense[25] & 0x03) {
1869 case 0x00: /* no not retry */
1870 erp->retries = 1;
1871 break;
1872
1873 case 0x01: /* retry 2 times */
1874 erp->retries = 2;
1875 break;
1876
1877 case 0x02: /* retry 10 times */
1878 erp->retries = 10;
1879 break;
1880
1881 case 0x03: /* retry 256 times */
1882 erp->retries = 256;
1883 break;
1884
1885 default:
1886 BUG();
1887 }
1888
1889 erp->function = dasd_3990_erp_compound_retry;
1890
1891} /* end dasd_3990_erp_compound_retry */
1892
1893/*
138c014d 1894 * DASD_3990_ERP_COMPOUND_PATH
1da177e4
LT		 1895 *
1896 * DESCRIPTION
1897 * Handles the compound ERP action for retry on alternate
1898 * channel path.
1899 *
1900 * PARAMETER
1901 * sense sense data of the actual error
1902 * erp pointer to the currently created ERP
1903 *
1904 * RETURN VALUES
1905 * erp modified ERP pointer
1906 *
1907 */
1908static void
1909dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
1910{
1da177e4
LT		 1911 if (sense[25] & DASD_SENSE_BIT_3) {
1912 dasd_3990_erp_alternate_path(erp);
1913
a4d26c6a
SW		 1914 if (erp->status == DASD_CQR_FAILED &&
1915 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
138c014d 1916 /* reset the lpm and the status to be able to
1da177e4 1917 * try further actions. */
a4d26c6a 1918 erp->lpm = erp->startdev->path_data.opm;
8e09f215 1919 erp->status = DASD_CQR_NEED_ERP;
1da177e4
LT		 1920 }
1921 }
1922
1923 erp->function = dasd_3990_erp_compound_path;
1924
1925} /* end dasd_3990_erp_compound_path */
1926
1927/*
138c014d 1928 * DASD_3990_ERP_COMPOUND_CODE
1da177e4
LT		 1929 *
1930 * DESCRIPTION
1931 * Handles the compound ERP action for retry code.
1932 *
1933 * PARAMETER
1934 * sense sense data of the actual error
1935 * erp pointer to the currently created ERP
1936 *
1937 * RETURN VALUES
1938 * erp NEW ERP pointer
1939 *
1940 */
1941static struct dasd_ccw_req *
1942dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense)
1943{
1944
1945 if (sense[25] & DASD_SENSE_BIT_2) {
1946
1947 switch (sense[28]) {
1948 case 0x17:
138c014d 1949 /* issue a Diagnostic Control command with an
3a4fa0a2 1950 * Inhibit Write subcommand and controller modifier */
1da177e4
LT		 1951 erp = dasd_3990_erp_DCTL(erp, 0x20);
1952 break;
138c014d 1953
1da177e4
LT		 1954 case 0x25:
1955 /* wait for 5 seconds and retry again */
1956 erp->retries = 1;
138c014d 1957
1da177e4
LT		 1958 dasd_3990_erp_block_queue (erp, 5*HZ);
1959 break;
138c014d 1960
1da177e4
LT		 1961 default:
1962 /* should not happen - continue */
1963 break;
1964 }
1965 }
1966
1967 erp->function = dasd_3990_erp_compound_code;
1968
1969 return erp;
1970
1971} /* end dasd_3990_erp_compound_code */
1972
1973/*
138c014d 1974 * DASD_3990_ERP_COMPOUND_CONFIG
1da177e4
LT		 1975 *
1976 * DESCRIPTION
1977 * Handles the compound ERP action for configruation
1978 * dependent error.
1979 * Note: duplex handling is not implemented (yet).
1980 *
1981 * PARAMETER
1982 * sense sense data of the actual error
1983 * erp pointer to the currently created ERP
1984 *
1985 * RETURN VALUES
1986 * erp modified ERP pointer
1987 *
1988 */
1989static void
1990dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
1991{
1992
1993 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) {
1994
fc19f381
SH		 1995 /* set to suspended duplex state then restart
1996 internal error 05 - Set device to suspended duplex state
1997 should be done */
8e09f215 1998 struct dasd_device *device = erp->startdev;
fc19f381
SH		 1999 dev_err(&device->cdev->dev,
2000 "An error occurred in the DASD device driver, "
2001 "reason=%s\n", "05");
1da177e4
LT		 2002
2003 }
2004
2005 erp->function = dasd_3990_erp_compound_config;
2006
2007} /* end dasd_3990_erp_compound_config */
2008
2009/*
138c014d 2010 * DASD_3990_ERP_COMPOUND
1da177e4
LT		 2011 *
2012 * DESCRIPTION
138c014d 2013 * Does the further compound program action if
1da177e4
LT		 2014 * compound retry was not successful.
2015 *
2016 * PARAMETER
2017 * sense sense data of the actual error
2018 * erp pointer to the current (failed) ERP
2019 *
2020 * RETURN VALUES
2021 * erp (additional) ERP pointer
2022 *
2023 */
2024static struct dasd_ccw_req *
2025dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense)
2026{
2027
2028 if ((erp->function == dasd_3990_erp_compound_retry) &&
8e09f215 2029 (erp->status == DASD_CQR_NEED_ERP)) {
1da177e4
LT		 2030
2031 dasd_3990_erp_compound_path(erp, sense);
2032 }
2033
2034 if ((erp->function == dasd_3990_erp_compound_path) &&
8e09f215 2035 (erp->status == DASD_CQR_NEED_ERP)) {
1da177e4
LT		 2036
2037 erp = dasd_3990_erp_compound_code(erp, sense);
2038 }
2039
2040 if ((erp->function == dasd_3990_erp_compound_code) &&
8e09f215 2041 (erp->status == DASD_CQR_NEED_ERP)) {
1da177e4
LT		 2042
2043 dasd_3990_erp_compound_config(erp, sense);
2044 }
2045
2046 /* if no compound action ERP specified, the request failed */
8e09f215 2047 if (erp->status == DASD_CQR_NEED_ERP)
1da177e4 2048 erp->status = DASD_CQR_FAILED;
1da177e4
LT		 2049
2050 return erp;
2051
2052} /* end dasd_3990_erp_compound */
2053
f60c768c
SH		 2054/*
2055 *DASD_3990_ERP_HANDLE_SIM
2056 *
2057 *DESCRIPTION
2058 * inspects the SIM SENSE data and starts an appropriate action
2059 *
2060 * PARAMETER
2061 * sense sense data of the actual error
2062 *
2063 * RETURN VALUES
2064 * none
2065 */
2066void
2067dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense)
2068{
2069 /* print message according to log or message to operator mode */
2070 if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) {
f60c768c 2071 /* print SIM SRC from RefCode */
fc19f381
SH		 2072 dev_err(&device->cdev->dev, "SIM - SRC: "
2073 "%02x%02x%02x%02x\n", sense[22],
f60c768c
SH		 2074 sense[23], sense[11], sense[12]);
2075 } else if (sense[24] & DASD_SIM_LOG) {
2076 /* print SIM SRC Refcode */
fc19f381
SH		 2077 dev_warn(&device->cdev->dev, "log SIM - SRC: "
2078 "%02x%02x%02x%02x\n", sense[22],
f60c768c
SH		 2079 sense[23], sense[11], sense[12]);
2080 }
2081}
2082
1da177e4 2083/*
138c014d 2084 * DASD_3990_ERP_INSPECT_32
1da177e4
LT		 2085 *
2086 * DESCRIPTION
2087 * Does a detailed inspection of the 32 byte sense data
138c014d 2088 * and sets up a related error recovery action.
1da177e4
LT		 2089 *
2090 * PARAMETER
2091 * sense sense data of the actual error
2092 * erp pointer to the currently created default ERP
2093 *
2094 * RETURN VALUES
2095 * erp_filled pointer to the ERP
2096 *
2097 */
2098static struct dasd_ccw_req *
2099dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
2100{
2101
8e09f215 2102 struct dasd_device *device = erp->startdev;
1da177e4
LT		 2103
2104 erp->function = dasd_3990_erp_inspect_32;
2105
f60c768c
SH		 2106 /* check for SIM sense data */
2107 if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)
2108 dasd_3990_erp_handle_sim(device, sense);
2109
1da177e4
LT		 2110 if (sense[25] & DASD_SENSE_BIT_0) {
2111
2112 /* compound program action codes (byte25 bit 0 == '1') */
2113 dasd_3990_erp_compound_retry(erp, sense);
2114
2115 } else {
2116
2117 /* single program action codes (byte25 bit 0 == '0') */
2118 switch (sense[25]) {
2119
2120 case 0x00: /* success - use default ERP for retries */
fc19f381 2121 DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
1da177e4
LT		 2122 "ERP called for successful request"
2123 " - just retry");
2124 break;
2125
2126 case 0x01: /* fatal error */
fc19f381
SH		 2127 dev_err(&device->cdev->dev,
2128 "ERP failed for the DASD\n");
1da177e4
LT		 2129
2130 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2131 break;
2132
2133 case 0x02: /* intervention required */
2134 case 0x03: /* intervention required during dual copy */
2135 erp = dasd_3990_erp_int_req(erp);
2136 break;
2137
fc19f381
SH		 2138 case 0x0F: /* length mismatch during update write command
2139 internal error 08 - update write command error*/
2140 dev_err(&device->cdev->dev, "An error occurred in the "
2141 "DASD device driver, reason=%s\n", "08");
1da177e4
LT		 2142
2143 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2144 break;
2145
2146 case 0x10: /* logging required for other channel program */
2147 erp = dasd_3990_erp_action_10_32(erp, sense);
2148 break;
2149
fc19f381
SH		 2150 case 0x15: /* next track outside defined extend
2151 internal error 07 - The next track is not
2152 within the defined storage extent */
2153 dev_err(&device->cdev->dev,
2154 "An error occurred in the DASD device driver, "
2155 "reason=%s\n", "07");
1da177e4
LT		 2156
2157 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2158 break;
2159
2160 case 0x1B: /* unexpected condition during write */
2161
2162 erp = dasd_3990_erp_action_1B_32(erp, sense);
2163 break;
2164
2165 case 0x1C: /* invalid data */
fc19f381 2166 dev_emerg(&device->cdev->dev,
1da177e4 2167 "Data recovered during retry with PCI "
fc19f381 2168 "fetch mode active\n");
1da177e4
LT		 2169
2170 /* not possible to handle this situation in Linux */
2171 panic
2172 ("Invalid data - No way to inform application "
2173 "about the possibly incorrect data");
2174 break;
2175
2176 case 0x1D: /* state-change pending */
fc19f381 2177 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2178 "A State change pending condition exists "
2179 "for the subsystem or device");
2180
2181 erp = dasd_3990_erp_action_4(erp, sense);
2182 break;
2183
2184 case 0x1E: /* busy */
fc19f381 2185 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2186 "Busy condition exists "
2187 "for the subsystem or device");
2188 erp = dasd_3990_erp_action_4(erp, sense);
2189 break;
2190
2191 default: /* all others errors - default erp */
2192 break;
2193 }
2194 }
2195
2196 return erp;
2197
2198} /* end dasd_3990_erp_inspect_32 */
2199
2200/*
138c014d 2201 *****************************************************************************
eef35c2d 2202 * main ERP control functions (24 and 32 byte sense)
138c014d 2203 *****************************************************************************
1da177e4
LT		 2204 */
2205
6c5f57c7
SH		 2206/*
2207 * DASD_3990_ERP_CONTROL_CHECK
2208 *
2209 * DESCRIPTION
25985edc 2210 * Does a generic inspection if a control check occurred and sets up
6c5f57c7
SH		 2211 * the related error recovery procedure
2212 *
2213 * PARAMETER
2214 * erp pointer to the currently created default ERP
2215 *
2216 * RETURN VALUES
2217 * erp_filled pointer to the erp
2218 */
2219
2220static struct dasd_ccw_req *
2221dasd_3990_erp_control_check(struct dasd_ccw_req *erp)
2222{
2223 struct dasd_device *device = erp->startdev;
2224
f3eb5384 2225 if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK
6c5f57c7 2226 | SCHN_STAT_CHN_CTRL_CHK)) {
fc19f381 2227 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6c5f57c7
SH		 2228 "channel or interface control check");
2229 erp = dasd_3990_erp_action_4(erp, NULL);
2230 }
2231 return erp;
2232}
2233
1da177e4
LT		 2234/*
2235 * DASD_3990_ERP_INSPECT
2236 *
2237 * DESCRIPTION
2238 * Does a detailed inspection for sense data by calling either
2239 * the 24-byte or the 32-byte inspection routine.
2240 *
2241 * PARAMETER
2242 * erp pointer to the currently created default ERP
2243 * RETURN VALUES
138c014d 2244 * erp_new contens was possibly modified
1da177e4
LT		 2245 */
2246static struct dasd_ccw_req *
f3eb5384 2247dasd_3990_erp_inspect(struct dasd_ccw_req *erp)
1da177e4
LT		 2248{
2249
2250 struct dasd_ccw_req *erp_new = NULL;
f3eb5384 2251 char *sense;
1da177e4 2252
25985edc 2253 /* if this problem occurred on an alias retry on base */
8e09f215
SW		 2254 erp_new = dasd_3990_erp_inspect_alias(erp);
2255 if (erp_new)
2256 return erp_new;
2257
f3eb5384
SW		 2258 /* sense data are located in the refers record of the
2259 * already set up new ERP !
2260 * check if concurrent sens is available
2261 */
2262 sense = dasd_get_sense(&erp->refers->irb);
2263 if (!sense)
6c5f57c7 2264 erp_new = dasd_3990_erp_control_check(erp);
1da177e4 2265 /* distinguish between 24 and 32 byte sense data */
6c5f57c7 2266 else if (sense[27] & DASD_SENSE_BIT_0) {
1da177e4
LT		 2267
2268 /* inspect the 24 byte sense data */
2269 erp_new = dasd_3990_erp_inspect_24(erp, sense);
2270
2271 } else {
2272
2273 /* inspect the 32 byte sense data */
2274 erp_new = dasd_3990_erp_inspect_32(erp, sense);
2275
2276 } /* end distinguish between 24 and 32 byte sense data */
2277
2278 return erp_new;
2279}
2280
2281/*
2282 * DASD_3990_ERP_ADD_ERP
138c014d 2283 *
1da177e4 2284 * DESCRIPTION
25985edc 2285 * This function adds an additional request block (ERP) to the head of
1da177e4 2286 * the given cqr (or erp).
f3eb5384
SW		 2287 * For a command mode cqr the erp is initialized as an default erp
2288 * (retry TIC).
2289 * For transport mode we make a copy of the original TCW (points to
2290 * the original TCCB, TIDALs, etc.) but give it a fresh
2291 * TSB so the original sense data will not be changed.
1da177e4
LT		 2292 *
2293 * PARAMETER
138c014d 2294 * cqr head of the current ERP-chain (or single cqr if
1da177e4
LT		 2295 * first error)
2296 * RETURN VALUES
2297 * erp pointer to new ERP-chain head
2298 */
f3eb5384 2299static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr)
1da177e4
LT		 2300{
2301
8e09f215 2302 struct dasd_device *device = cqr->startdev;
1da177e4 2303 struct ccw1 *ccw;
1da177e4 2304 struct dasd_ccw_req *erp;
f3eb5384
SW		 2305 int cplength, datasize;
2306 struct tcw *tcw;
2307 struct tsb *tsb;
2308
2309 if (cqr->cpmode == 1) {
2310 cplength = 0;
4a31ba57
SW		 2311 /* TCW needs to be 64 byte aligned, so leave enough room */
2312 datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb);
f3eb5384
SW		 2313 } else {
2314 cplength = 2;
2315 datasize = 0;
2316 }
1da177e4 2317
f3eb5384
SW		 2318 /* allocate additional request block */
2319 erp = dasd_alloc_erp_request((char *) &cqr->magic,
2320 cplength, datasize, device);
1da177e4
LT		 2321 if (IS_ERR(erp)) {
2322 if (cqr->retries <= 0) {
fc19f381 2323 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1da177e4
LT		 2324 "Unable to allocate ERP request");
2325 cqr->status = DASD_CQR_FAILED;
2326 cqr->stopclk = get_clock ();
2327 } else {
fc19f381 2328 DBF_DEV_EVENT(DBF_ERR, device,
1da177e4
LT		 2329 "Unable to allocate ERP request "
2330 "(%i retries left)",
2331 cqr->retries);
8e09f215 2332 dasd_block_set_timer(device->block, (HZ << 3));
1da177e4 2333 }
6a5176c4 2334 return erp;
1da177e4
LT		 2335 }
2336
eb6e199b 2337 ccw = cqr->cpaddr;
f3eb5384
SW		 2338 if (cqr->cpmode == 1) {
2339 /* make a shallow copy of the original tcw but set new tsb */
2340 erp->cpmode = 1;
4a31ba57
SW		 2341 erp->cpaddr = PTR_ALIGN(erp->data, 64);
2342 tcw = erp->cpaddr;
f3eb5384
SW		 2343 tsb = (struct tsb *) &tcw[1];
2344 *tcw = *((struct tcw *)cqr->cpaddr);
2345 tcw->tsb = (long)tsb;
eb6e199b
SW		 2346 } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) {
2347 /* PSF cannot be chained from NOOP/TIC */
2348 erp->cpaddr = cqr->cpaddr;
f3eb5384
SW		 2349 } else {
2350 /* initialize request with default TIC to current ERP/CQR */
2351 ccw = erp->cpaddr;
2352 ccw->cmd_code = CCW_CMD_NOOP;
2353 ccw->flags = CCW_FLAG_CC;
2354 ccw++;
2355 ccw->cmd_code = CCW_CMD_TIC;
2356 ccw->cda = (long)(cqr->cpaddr);
2357 }
2358
7ea8d321 2359 erp->flags = cqr->flags;
1da177e4
LT		 2360 erp->function = dasd_3990_erp_add_erp;
2361 erp->refers = cqr;
8e09f215
SW		 2362 erp->startdev = device;
2363 erp->memdev = device;
2364 erp->block = cqr->block;
1da177e4
LT		 2365 erp->magic = cqr->magic;
2366 erp->expires = 0;
2367 erp->retries = 256;
2368 erp->buildclk = get_clock();
1da177e4
LT		 2369 erp->status = DASD_CQR_FILLED;
2370
2371 return erp;
2372}
2373
2374/*
138c014d
HH		 2375 * DASD_3990_ERP_ADDITIONAL_ERP
2376 *
1da177e4
LT		 2377 * DESCRIPTION
2378 * An additional ERP is needed to handle the current error.
2379 * Add ERP to the head of the ERP-chain containing the ERP processing
2380 * determined based on the sense data.
2381 *
2382 * PARAMETER
138c014d 2383 * cqr head of the current ERP-chain (or single cqr if
1da177e4
LT		 2384 * first error)
2385 *
2386 * RETURN VALUES
2387 * erp pointer to new ERP-chain head
2388 */
2389static struct dasd_ccw_req *
2390dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr)
2391{
2392
2393 struct dasd_ccw_req *erp = NULL;
2394
2395 /* add erp and initialize with default TIC */
2396 erp = dasd_3990_erp_add_erp(cqr);
2397
6a5176c4
SH		 2398 if (IS_ERR(erp))
2399 return erp;
2400
1da177e4
LT		 2401 /* inspect sense, determine specific ERP if possible */
2402 if (erp != cqr) {
2403
2404 erp = dasd_3990_erp_inspect(erp);
2405 }
2406
2407 return erp;
2408
2409} /* end dasd_3990_erp_additional_erp */
2410
2411/*
2412 * DASD_3990_ERP_ERROR_MATCH
2413 *
2414 * DESCRIPTION
2415 * Check if the device status of the given cqr is the same.
2416 * This means that the failed CCW and the relevant sense data
2417 * must match.
2418 * I don't distinguish between 24 and 32 byte sense because in case of
2419 * 24 byte sense byte 25 and 27 is set as well.
2420 *
2421 * PARAMETER
138c014d 2422 * cqr1 first cqr, which will be compared with the
1da177e4
LT		 2423 * cqr2 second cqr.
2424 *
2425 * RETURN VALUES
2426 * match 'boolean' for match found
2427 * returns 1 if match found, otherwise 0.
2428 */
f3eb5384
SW		 2429static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1,
2430 struct dasd_ccw_req *cqr2)
1da177e4 2431{
f3eb5384 2432 char *sense1, *sense2;
1da177e4 2433
5c12f240
SW		 2434 if (cqr1->startdev != cqr2->startdev)
2435 return 0;
1da177e4 2436
f3eb5384
SW		 2437 sense1 = dasd_get_sense(&cqr1->irb);
2438 sense2 = dasd_get_sense(&cqr2->irb);
6c5f57c7 2439
f3eb5384
SW		 2440 /* one request has sense data, the other not -> no match, return 0 */
2441 if (!sense1 != !sense2)
2442 return 0;
2443 /* no sense data in both cases -> check cstat for IFCC */
2444 if (!sense1 && !sense2) {
2445 if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
2446 SCHN_STAT_CHN_CTRL_CHK)) ==
2447 (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
2448 SCHN_STAT_CHN_CTRL_CHK)))
6c5f57c7
SH		 2449 return 1; /* match with ifcc*/
2450 }
1da177e4 2451 /* check sense data; byte 0-2,25,27 */
f3eb5384
SW		 2452 if (!(sense1 && sense2 &&
2453 (memcmp(sense1, sense2, 3) == 0) &&
2454 (sense1[27] == sense2[27]) &&
2455 (sense1[25] == sense2[25]))) {
1da177e4
LT		 2456
2457 return 0; /* sense doesn't match */
2458 }
2459
2460 return 1; /* match */
2461
2462} /* end dasd_3990_erp_error_match */
2463
2464/*
2465 * DASD_3990_ERP_IN_ERP
2466 *
2467 * DESCRIPTION
2468 * check if the current error already happened before.
2469 * quick exit if current cqr is not an ERP (cqr->refers=NULL)
2470 *
2471 * PARAMETER
2472 * cqr failed cqr (either original cqr or already an erp)
2473 *
2474 * RETURN VALUES
138c014d 2475 * erp erp-pointer to the already defined error
1da177e4
LT		 2476 * recovery procedure OR
2477 * NULL if a 'new' error occurred.
2478 */
2479static struct dasd_ccw_req *
2480dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr)
2481{
2482
2483 struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */
2484 *erp_match = NULL; /* save erp chain head */
2485 int match = 0; /* 'boolean' for matching error found */
2486
2487 if (cqr->refers == NULL) { /* return if not in erp */
2488 return NULL;
2489 }
2490
2491 /* check the erp/cqr chain for current error */
2492 do {
2493 match = dasd_3990_erp_error_match(erp_head, cqr->refers);
2494 erp_match = cqr; /* save possible matching erp */
2495 cqr = cqr->refers; /* check next erp/cqr in queue */
2496
2497 } while ((cqr->refers != NULL) && (!match));
2498
2499 if (!match) {
2500 return NULL; /* no match was found */
2501 }
2502
2503 return erp_match; /* return address of matching erp */
2504
2505} /* END dasd_3990_erp_in_erp */
2506
2507/*
2508 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense)
2509 *
2510 * DESCRIPTION
138c014d 2511 * No retry is left for the current ERP. Check what has to be done
1da177e4
LT		 2512 * with the ERP.
2513 * - do further defined ERP action or
138c014d 2514 * - wait for interrupt or
1da177e4
LT		 2515 * - exit with permanent error
2516 *
2517 * PARAMETER
2518 * erp ERP which is in progress with no retry left
2519 *
2520 * RETURN VALUES
2521 * erp modified/additional ERP
2522 */
2523static struct dasd_ccw_req *
2524dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
2525{
2526
8e09f215 2527 struct dasd_device *device = erp->startdev;
f3eb5384 2528 char *sense = dasd_get_sense(&erp->irb);
1da177e4
LT		 2529
2530 /* check for 24 byte sense ERP */
2531 if ((erp->function == dasd_3990_erp_bus_out) ||
2532 (erp->function == dasd_3990_erp_action_1) ||
2533 (erp->function == dasd_3990_erp_action_4)) {
2534
2535 erp = dasd_3990_erp_action_1(erp);
2536
eb6e199b
SW		 2537 } else if (erp->function == dasd_3990_erp_action_1_sec) {
2538 erp = dasd_3990_erp_action_1_sec(erp);
1da177e4
LT		 2539 } else if (erp->function == dasd_3990_erp_action_5) {
2540
2541 /* retries have not been successful */
2542 /* prepare erp for retry on different channel path */
2543 erp = dasd_3990_erp_action_1(erp);
2544
f3eb5384 2545 if (sense && !(sense[2] & DASD_SENSE_BIT_0)) {
1da177e4 2546
138c014d 2547 /* issue a Diagnostic Control command with an
1da177e4
LT		 2548 * Inhibit Write subcommand */
2549
2550 switch (sense[25]) {
2551 case 0x17:
2552 case 0x57:{ /* controller */
2553 erp = dasd_3990_erp_DCTL(erp, 0x20);
2554 break;
2555 }
2556 case 0x18:
2557 case 0x58:{ /* channel path */
2558 erp = dasd_3990_erp_DCTL(erp, 0x40);
2559 break;
2560 }
2561 case 0x19:
2562 case 0x59:{ /* storage director */
2563 erp = dasd_3990_erp_DCTL(erp, 0x80);
2564 break;
2565 }
2566 default:
fc19f381 2567 DBF_DEV_EVENT(DBF_WARNING, device,
1da177e4
LT		 2568 "invalid subcommand modifier 0x%x "
2569 "for Diagnostic Control Command",
2570 sense[25]);
2571 }
2572 }
2573
2574 /* check for 32 byte sense ERP */
f3eb5384
SW		 2575 } else if (sense &&
2576 ((erp->function == dasd_3990_erp_compound_retry) ||
2577 (erp->function == dasd_3990_erp_compound_path) ||
2578 (erp->function == dasd_3990_erp_compound_code) ||
2579 (erp->function == dasd_3990_erp_compound_config))) {
1da177e4
LT		 2580
2581 erp = dasd_3990_erp_compound(erp, sense);
2582
2583 } else {
fc19f381
SH		 2584 /*
2585 * No retry left and no additional special handling
2586 * necessary
2587 */
2588 dev_err(&device->cdev->dev,
2589 "ERP %p has run out of retries and failed\n", erp);
1da177e4
LT		 2590
2591 erp->status = DASD_CQR_FAILED;
2592 }
2593
2594 return erp;
2595
2596} /* end dasd_3990_erp_further_erp */
2597
2598/*
138c014d 2599 * DASD_3990_ERP_HANDLE_MATCH_ERP
1da177e4
LT		 2600 *
2601 * DESCRIPTION
2602 * An error occurred again and an ERP has been detected which is already
138c014d 2603 * used to handle this error (e.g. retries).
1da177e4
LT		 2604 * All prior ERP's are asumed to be successful and therefore removed
2605 * from queue.
138c014d 2606 * If retry counter of matching erp is already 0, it is checked if further
1da177e4
LT		 2607 * action is needed (besides retry) or if the ERP has failed.
2608 *
2609 * PARAMETER
2610 * erp_head first ERP in ERP-chain
2611 * erp ERP that handles the actual error.
2612 * (matching erp)
2613 *
2614 * RETURN VALUES
2615 * erp modified/additional ERP
2616 */
2617static struct dasd_ccw_req *
2618dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
2619 struct dasd_ccw_req *erp)
2620{
2621
8e09f215 2622 struct dasd_device *device = erp_head->startdev;
1da177e4
LT		 2623 struct dasd_ccw_req *erp_done = erp_head; /* finished req */
2624 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */
2625
2626 /* loop over successful ERPs and remove them from chanq */
2627 while (erp_done != erp) {
2628
2629 if (erp_done == NULL) /* end of chain reached */
2630 panic(PRINTK_HEADER "Programming error in ERP! The "
2631 "original request was lost\n");
2632
2633 /* remove the request from the device queue */
8e09f215 2634 list_del(&erp_done->blocklist);
1da177e4
LT		 2635
2636 erp_free = erp_done;
2637 erp_done = erp_done->refers;
2638
2639 /* free the finished erp request */
8e09f215 2640 dasd_free_erp_request(erp_free, erp_free->memdev);
1da177e4
LT		 2641
2642 } /* end while */
2643
2644 if (erp->retries > 0) {
2645
f3eb5384 2646 char *sense = dasd_get_sense(&erp->refers->irb);
1da177e4
LT		 2647
2648 /* check for special retries */
f3eb5384 2649 if (sense && erp->function == dasd_3990_erp_action_4) {
1da177e4
LT		 2650
2651 erp = dasd_3990_erp_action_4(erp, sense);
2652
f3eb5384
SW		 2653 } else if (sense &&
2654 erp->function == dasd_3990_erp_action_1B_32) {
1da177e4
LT		 2655
2656 erp = dasd_3990_update_1B(erp, sense);
2657
f3eb5384 2658 } else if (sense && erp->function == dasd_3990_erp_int_req) {
1da177e4
LT		 2659
2660 erp = dasd_3990_erp_int_req(erp);
2661
2662 } else {
2663 /* simple retry */
fc19f381 2664 DBF_DEV_EVENT(DBF_DEBUG, device,
1da177e4
LT		 2665 "%i retries left for erp %p",
2666 erp->retries, erp);
2667
2668 /* handle the request again... */
8e09f215 2669 erp->status = DASD_CQR_FILLED;
1da177e4
LT		 2670 }
2671
2672 } else {
2673 /* no retry left - check for further necessary action */
2674 /* if no further actions, handle rest as permanent error */
2675 erp = dasd_3990_erp_further_erp(erp);
2676 }
2677
2678 return erp;
2679
2680} /* end dasd_3990_erp_handle_match_erp */
2681
2682/*
2683 * DASD_3990_ERP_ACTION
2684 *
2685 * DESCRIPTION
5d67d164 2686 * control routine for 3990 erp actions.
1da177e4
LT		 2687 * Has to be called with the queue lock (namely the s390_irq_lock) acquired.
2688 *
2689 * PARAMETER
2690 * cqr failed cqr (either original cqr or already an erp)
2691 *
2692 * RETURN VALUES
2693 * erp erp-pointer to the head of the ERP action chain.
2694 * This means:
2695 * - either a ptr to an additional ERP cqr or
138c014d 2696 * - the original given cqr (which's status might
1da177e4
LT		 2697 * be modified)
2698 */
2699struct dasd_ccw_req *
2700dasd_3990_erp_action(struct dasd_ccw_req * cqr)
2701{
1da177e4 2702 struct dasd_ccw_req *erp = NULL;
8e09f215 2703 struct dasd_device *device = cqr->startdev;
9575bf26 2704 struct dasd_ccw_req *temp_erp = NULL;
1da177e4 2705
9575bf26
HH		 2706 if (device->features & DASD_FEATURE_ERPLOG) {
2707 /* print current erp_chain */
fc19f381
SH		 2708 dev_err(&device->cdev->dev,
2709 "ERP chain at BEGINNING of ERP-ACTION\n");
1da177e4
LT		 2710 for (temp_erp = cqr;
2711 temp_erp != NULL; temp_erp = temp_erp->refers) {
2712
fc19f381
SH		 2713 dev_err(&device->cdev->dev,
2714 "ERP %p (%02x) refers to %p\n",
1da177e4
LT		 2715 temp_erp, temp_erp->status,
2716 temp_erp->refers);
2717 }
2718 }
1da177e4 2719
73ac36ea 2720 /* double-check if current erp/cqr was successful */
f3eb5384
SW		 2721 if ((scsw_cstat(&cqr->irb.scsw) == 0x00) &&
2722 (scsw_dstat(&cqr->irb.scsw) ==
23d805b6 2723 (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) {
1da177e4 2724
fc19f381 2725 DBF_DEV_EVENT(DBF_DEBUG, device,
1da177e4
LT		 2726 "ERP called for successful request %p"
2727 " - NO ERP necessary", cqr);
2728
2729 cqr->status = DASD_CQR_DONE;
2730
2731 return cqr;
2732 }
1da177e4
LT		 2733
2734 /* check if error happened before */
2735 erp = dasd_3990_erp_in_erp(cqr);
2736
2737 if (erp == NULL) {
2738 /* no matching erp found - set up erp */
2739 erp = dasd_3990_erp_additional_erp(cqr);
6a5176c4
SH		 2740 if (IS_ERR(erp))
2741 return erp;
1da177e4
LT		 2742 } else {
2743 /* matching erp found - set all leading erp's to DONE */
2744 erp = dasd_3990_erp_handle_match_erp(cqr, erp);
2745 }
2746
9575bf26
HH		 2747 if (device->features & DASD_FEATURE_ERPLOG) {
2748 /* print current erp_chain */
fc19f381
SH		 2749 dev_err(&device->cdev->dev,
2750 "ERP chain at END of ERP-ACTION\n");
1da177e4
LT		 2751 for (temp_erp = erp;
2752 temp_erp != NULL; temp_erp = temp_erp->refers) {
2753
fc19f381
SH		 2754 dev_err(&device->cdev->dev,
2755 "ERP %p (%02x) refers to %p\n",
1da177e4
LT		 2756 temp_erp, temp_erp->status,
2757 temp_erp->refers);
2758 }
2759 }
1da177e4 2760
8e09f215
SW		 2761 /* enqueue ERP request if it's a new one */
2762 if (list_empty(&erp->blocklist)) {
2763 cqr->status = DASD_CQR_IN_ERP;
2764 /* add erp request before the cqr */
2765 list_add_tail(&erp->blocklist, &cqr->blocklist);
1da177e4
LT		 2766 }
2767
fc19f381
SH		 2768
2769
1da177e4
LT		 2770 return erp;
2771
2772} /* end dasd_3990_erp_action */
Linux kernel - Deliverables
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