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Merge branch 'for-4.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
[mirror_ubuntu-bionic-kernel.git] / drivers / s390 / block / dasd_3990_erp.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
138c014d 2/*
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>
a53c8fab 6 * Copyright IBM Corp. 2000, 2001
1da177e4 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)
c9346151 156 erp->lpm = dasd_path_get_opm(device) &
a4d26c6a 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
1aae0560 233 dctl_cqr->buildclk = get_tod_clock();
1da177e4
LT		 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;
c9346151 277 erp->lpm = dasd_path_get_opm(erp->startdev);
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,
50cff5ad 678 "FORMAT 4 - No sync 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,
50cff5ad 688 "FORMAT 4 - No sync 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 1002 dev_warn(&device->cdev->dev,
50cff5ad 1003 "FORMAT F - 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 */
ab24fbd3
SH		 1056 if (!test_bit(DASD_CQR_SUPPRESS_CR, &erp->flags))
1057 dev_err(&device->cdev->dev,
1058 "An error occurred in the DASD device driver, reason=09\n");
1da177e4
LT		 1059
1060 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1061 }
1062
1063 return erp;
1064
1065} /* end dasd_3990_erp_com_rej */
1066
1067/*
138c014d 1068 * DASD_3990_ERP_BUS_OUT
1da177e4
LT		 1069 *
1070 * DESCRIPTION
1071 * Handles 24 byte 'Bus Out Parity Check' error.
1072 *
1073 * PARAMETER
1074 * erp current erp_head
1075 * RETURN VALUES
1076 * erp new erp_head - pointer to new ERP
1077 */
1078static struct dasd_ccw_req *
1079dasd_3990_erp_bus_out(struct dasd_ccw_req * erp)
1080{
1081
8e09f215 1082 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1083
1084 /* first time set initial retry counter and erp_function */
1085 /* and retry once without blocking queue */
1086 /* (this enables easier enqueing of the cqr) */
1087 if (erp->function != dasd_3990_erp_bus_out) {
1088 erp->retries = 256;
1089 erp->function = dasd_3990_erp_bus_out;
1090
1091 } else {
1092
1093 /* issue a message and wait for 'device ready' interrupt */
fc19f381 1094 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1095 "bus out parity error or BOPC requested by "
1096 "channel");
1097
1098 dasd_3990_erp_block_queue(erp, 60*HZ);
1099
1100 }
1101
1102 return erp;
1103
1104} /* end dasd_3990_erp_bus_out */
1105
1106/*
1107 * DASD_3990_ERP_EQUIP_CHECK
1108 *
1109 * DESCRIPTION
1110 * Handles 24 byte 'Equipment Check' error.
1111 *
1112 * PARAMETER
1113 * erp current erp_head
1114 * RETURN VALUES
1115 * erp new erp_head - pointer to new ERP
1116 */
1117static struct dasd_ccw_req *
1118dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense)
1119{
1120
8e09f215 1121 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1122
1123 erp->function = dasd_3990_erp_equip_check;
1124
1125 if (sense[1] & SNS1_WRITE_INHIBITED) {
fc19f381
SH		 1126 dev_info(&device->cdev->dev,
1127 "Write inhibited path encountered\n");
1da177e4 1128
fc19f381
SH		 1129 /* vary path offline
1130 internal error 04 - Path should be varied off-line.*/
1131 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1132 "device driver, reason=%s\n", "04");
1da177e4
LT		 1133
1134 erp = dasd_3990_erp_action_1(erp);
1135
1136 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1137
fc19f381 1138 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1139 "Equipment Check - " "environmental data present");
1140
1141 dasd_3990_handle_env_data(erp, sense);
1142
1143 erp = dasd_3990_erp_action_4(erp, sense);
1144
1145 } else if (sense[1] & SNS1_PERM_ERR) {
1146
fc19f381 1147 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1148 "Equipment Check - retry exhausted or "
1149 "undesirable");
1150
1151 erp = dasd_3990_erp_action_1(erp);
1152
1153 } else {
1154 /* all other equipment checks - Action 5 */
1155 /* rest is done when retries == 0 */
fc19f381 1156 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1157 "Equipment check or processing error");
1158
1159 erp = dasd_3990_erp_action_5(erp);
1160 }
1da177e4
LT		 1161 return erp;
1162
1163} /* end dasd_3990_erp_equip_check */
1164
1165/*
1166 * DASD_3990_ERP_DATA_CHECK
1167 *
1168 * DESCRIPTION
1169 * Handles 24 byte 'Data Check' error.
1170 *
1171 * PARAMETER
1172 * erp current erp_head
1173 * RETURN VALUES
1174 * erp new erp_head - pointer to new ERP
1175 */
1176static struct dasd_ccw_req *
1177dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense)
1178{
1179
8e09f215 1180 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1181
1182 erp->function = dasd_3990_erp_data_check;
1183
1184 if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */
1185
1186 /* issue message that the data has been corrected */
fc19f381 1187 dev_emerg(&device->cdev->dev,
1da177e4 1188 "Data recovered during retry with PCI "
fc19f381 1189 "fetch mode active\n");
1da177e4
LT		 1190
1191 /* not possible to handle this situation in Linux */
1192 panic("No way to inform application about the possibly "
1193 "incorrect data");
1194
1195 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1196
fc19f381 1197 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1198 "Uncorrectable data check recovered secondary "
1199 "addr of duplex pair");
1200
1201 erp = dasd_3990_erp_action_4(erp, sense);
1202
1203 } else if (sense[1] & SNS1_PERM_ERR) {
1204
fc19f381 1205 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1206 "Uncorrectable data check with internal "
1207 "retry exhausted");
1208
1209 erp = dasd_3990_erp_action_1(erp);
1210
1211 } else {
1212 /* all other data checks */
fc19f381 1213 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1214 "Uncorrectable data check with retry count "
1215 "exhausted...");
1216
1217 erp = dasd_3990_erp_action_5(erp);
1218 }
1219
1220 return erp;
1221
1222} /* end dasd_3990_erp_data_check */
1223
1224/*
1225 * DASD_3990_ERP_OVERRUN
1226 *
1227 * DESCRIPTION
1228 * Handles 24 byte 'Overrun' error.
1229 *
1230 * PARAMETER
1231 * erp current erp_head
1232 * RETURN VALUES
1233 * erp new erp_head - pointer to new ERP
1234 */
1235static struct dasd_ccw_req *
1236dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense)
1237{
1238
8e09f215 1239 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1240
1241 erp->function = dasd_3990_erp_overrun;
1242
fc19f381 1243 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1244 "Overrun - service overrun or overrun"
1245 " error requested by channel");
1246
1247 erp = dasd_3990_erp_action_5(erp);
1248
1249 return erp;
1250
1251} /* end dasd_3990_erp_overrun */
1252
1253/*
1254 * DASD_3990_ERP_INV_FORMAT
1255 *
1256 * DESCRIPTION
1257 * Handles 24 byte 'Invalid Track Format' error.
1258 *
1259 * PARAMETER
1260 * erp current erp_head
1261 * RETURN VALUES
1262 * erp new erp_head - pointer to new ERP
1263 */
1264static struct dasd_ccw_req *
1265dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense)
1266{
1267
8e09f215 1268 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1269
1270 erp->function = dasd_3990_erp_inv_format;
1271
1272 if (sense[2] & SNS2_ENV_DATA_PRESENT) {
1273
fc19f381 1274 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1275 "Track format error when destaging or "
1276 "staging data");
1277
1278 dasd_3990_handle_env_data(erp, sense);
1279
1280 erp = dasd_3990_erp_action_4(erp, sense);
1281
1282 } else {
fc19f381
SH		 1283 /* internal error 06 - The track format is not valid*/
1284 dev_err(&device->cdev->dev,
1285 "An error occurred in the DASD device driver, "
1286 "reason=%s\n", "06");
1da177e4
LT		 1287
1288 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1289 }
1290
1291 return erp;
1292
1293} /* end dasd_3990_erp_inv_format */
1294
1295/*
1296 * DASD_3990_ERP_EOC
1297 *
1298 * DESCRIPTION
1299 * Handles 24 byte 'End-of-Cylinder' error.
1300 *
1301 * PARAMETER
1302 * erp already added default erp
1303 * RETURN VALUES
1304 * erp pointer to original (failed) cqr.
1305 */
1306static struct dasd_ccw_req *
1307dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense)
1308{
1309
8e09f215 1310 struct dasd_device *device = default_erp->startdev;
1da177e4 1311
fc19f381
SH		 1312 dev_err(&device->cdev->dev,
1313 "The cylinder data for accessing the DASD is inconsistent\n");
1da177e4
LT		 1314
1315 /* implement action 7 - BUG */
1316 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1317
1318} /* end dasd_3990_erp_EOC */
1319
1320/*
1321 * DASD_3990_ERP_ENV_DATA
1322 *
1323 * DESCRIPTION
1324 * Handles 24 byte 'Environmental-Data Present' error.
1325 *
1326 * PARAMETER
1327 * erp current erp_head
1328 * RETURN VALUES
1329 * erp new erp_head - pointer to new ERP
1330 */
1331static struct dasd_ccw_req *
1332dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense)
1333{
1334
8e09f215 1335 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1336
1337 erp->function = dasd_3990_erp_env_data;
1338
fc19f381 1339 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Environmental data present");
1da177e4
LT		 1340
1341 dasd_3990_handle_env_data(erp, sense);
1342
1343 /* don't retry on disabled interface */
1344 if (sense[7] != 0x0F) {
1da177e4
LT		 1345 erp = dasd_3990_erp_action_4(erp, sense);
1346 } else {
8e09f215 1347 erp->status = DASD_CQR_FILLED;
1da177e4
LT		 1348 }
1349
1350 return erp;
1351
1352} /* end dasd_3990_erp_env_data */
1353
1354/*
1355 * DASD_3990_ERP_NO_REC
1356 *
1357 * DESCRIPTION
1358 * Handles 24 byte 'No Record Found' error.
1359 *
1360 * PARAMETER
1361 * erp already added default ERP
138c014d 1362 *
1da177e4
LT		 1363 * RETURN VALUES
1364 * erp new erp_head - pointer to new ERP
1365 */
1366static struct dasd_ccw_req *
1367dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense)
1368{
1369
8e09f215 1370 struct dasd_device *device = default_erp->startdev;
1da177e4 1371
8fd57520
JH		 1372 /*
1373 * In some cases the 'No Record Found' error might be expected and
1374 * log messages shouldn't be written then.
1375 * Check if the according suppress bit is set.
1376 */
1377 if (!test_bit(DASD_CQR_SUPPRESS_NRF, &default_erp->flags))
1378 dev_err(&device->cdev->dev,
1379 "The specified record was not found\n");
1da177e4
LT		 1380
1381 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1382
1383} /* end dasd_3990_erp_no_rec */
1384
1385/*
1386 * DASD_3990_ERP_FILE_PROT
1387 *
1388 * DESCRIPTION
1389 * Handles 24 byte 'File Protected' error.
1390 * Note: Seek related recovery is not implemented because
1391 * wee don't use the seek command yet.
1392 *
1393 * PARAMETER
1394 * erp current erp_head
1395 * RETURN VALUES
1396 * erp new erp_head - pointer to new ERP
1397 */
1398static struct dasd_ccw_req *
1399dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
1400{
1401
8e09f215 1402 struct dasd_device *device = erp->startdev;
1da177e4 1403
8fd57520
JH		 1404 /*
1405 * In some cases the 'File Protected' error might be expected and
1406 * log messages shouldn't be written then.
1407 * Check if the according suppress bit is set.
1408 */
1409 if (!test_bit(DASD_CQR_SUPPRESS_FP, &erp->flags))
1410 dev_err(&device->cdev->dev,
1411 "Accessing the DASD failed because of a hardware error\n");
1da177e4
LT		 1412
1413 return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1414
1415} /* end dasd_3990_erp_file_prot */
1416
8e09f215
SW		 1417/*
1418 * DASD_3990_ERP_INSPECT_ALIAS
1419 *
1420 * DESCRIPTION
1421 * Checks if the original request was started on an alias device.
1422 * If yes, it modifies the original and the erp request so that
1423 * the erp request can be started on a base device.
1424 *
1425 * PARAMETER
1426 * erp pointer to the currently created default ERP
1427 *
1428 * RETURN VALUES
1429 * erp pointer to the modified ERP, or NULL
1430 */
1431
1432static struct dasd_ccw_req *dasd_3990_erp_inspect_alias(
1433 struct dasd_ccw_req *erp)
1434{
1435 struct dasd_ccw_req *cqr = erp->refers;
501183f2 1436 char *sense;
8e09f215
SW		 1437
1438 if (cqr->block &&
1439 (cqr->block->base != cqr->startdev)) {
501183f2
SH		 1440
1441 sense = dasd_get_sense(&erp->refers->irb);
1442 /*
1443 * dynamic pav may have changed base alias mapping
1444 */
1445 if (!test_bit(DASD_FLAG_OFFLINE, &cqr->startdev->flags) && sense
1446 && (sense[0] == 0x10) && (sense[7] == 0x0F)
1447 && (sense[8] == 0x67)) {
1448 /*
1449 * remove device from alias handling to prevent new
1450 * requests from being scheduled on the
1451 * wrong alias device
1452 */
1453 dasd_alias_remove_device(cqr->startdev);
1454
1455 /* schedule worker to reload device */
1456 dasd_reload_device(cqr->startdev);
1457 }
1458
8e09f215 1459 if (cqr->startdev->features & DASD_FEATURE_ERPLOG) {
fc19f381 1460 DBF_DEV_EVENT(DBF_ERR, cqr->startdev,
8e09f215
SW		 1461 "ERP on alias device for request %p,"
1462 " recover on base device %s", cqr,
2a0217d5 1463 dev_name(&cqr->block->base->cdev->dev));
8e09f215
SW		 1464 }
1465 dasd_eckd_reset_ccw_to_base_io(cqr);
1466 erp->startdev = cqr->block->base;
1467 erp->function = dasd_3990_erp_inspect_alias;
1468 return erp;
1469 } else
1470 return NULL;
1471}
1472
1473
1da177e4 1474/*
138c014d 1475 * DASD_3990_ERP_INSPECT_24
1da177e4
LT		 1476 *
1477 * DESCRIPTION
1478 * Does a detailed inspection of the 24 byte sense data
138c014d 1479 * and sets up a related error recovery action.
1da177e4
LT		 1480 *
1481 * PARAMETER
1482 * sense sense data of the actual error
1483 * erp pointer to the currently created default ERP
1484 *
1485 * RETURN VALUES
1486 * erp pointer to the (addtitional) ERP
1487 */
1488static struct dasd_ccw_req *
1489dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense)
1490{
1491
1492 struct dasd_ccw_req *erp_filled = NULL;
1493
1494 /* Check sense for .... */
1495 /* 'Command Reject' */
1496 if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) {
1497 erp_filled = dasd_3990_erp_com_rej(erp, sense);
1498 }
1499 /* 'Intervention Required' */
1500 if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) {
1501 erp_filled = dasd_3990_erp_int_req(erp);
1502 }
1503 /* 'Bus Out Parity Check' */
1504 if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) {
1505 erp_filled = dasd_3990_erp_bus_out(erp);
1506 }
1507 /* 'Equipment Check' */
1508 if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) {
1509 erp_filled = dasd_3990_erp_equip_check(erp, sense);
1510 }
1511 /* 'Data Check' */
1512 if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) {
1513 erp_filled = dasd_3990_erp_data_check(erp, sense);
1514 }
1515 /* 'Overrun' */
1516 if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) {
1517 erp_filled = dasd_3990_erp_overrun(erp, sense);
1518 }
1519 /* 'Invalid Track Format' */
1520 if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) {
1521 erp_filled = dasd_3990_erp_inv_format(erp, sense);
1522 }
1523 /* 'End-of-Cylinder' */
1524 if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) {
1525 erp_filled = dasd_3990_erp_EOC(erp, sense);
1526 }
1527 /* 'Environmental Data' */
1528 if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) {
1529 erp_filled = dasd_3990_erp_env_data(erp, sense);
1530 }
1531 /* 'No Record Found' */
1532 if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) {
1533 erp_filled = dasd_3990_erp_no_rec(erp, sense);
1534 }
1535 /* 'File Protected' */
1536 if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) {
1537 erp_filled = dasd_3990_erp_file_prot(erp);
1538 }
1539 /* other (unknown) error - do default ERP */
1540 if (erp_filled == NULL) {
1541
1542 erp_filled = erp;
1543 }
1544
1545 return erp_filled;
1546
1547} /* END dasd_3990_erp_inspect_24 */
1548
1549/*
138c014d 1550 *****************************************************************************
1da177e4 1551 * 32 byte sense ERP functions (only)
138c014d 1552 *****************************************************************************
1da177e4
LT		 1553 */
1554
1555/*
138c014d 1556 * DASD_3990_ERPACTION_10_32
1da177e4
LT		 1557 *
1558 * DESCRIPTION
1559 * Handles 32 byte 'Action 10' of Single Program Action Codes.
1560 * Just retry and if retry doesn't work, return with error.
1561 *
1562 * PARAMETER
1563 * erp current erp_head
138c014d 1564 * sense current sense data
1da177e4
LT		 1565 * RETURN VALUES
1566 * erp modified erp_head
1567 */
1568static struct dasd_ccw_req *
1569dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense)
1570{
1571
8e09f215 1572 struct dasd_device *device = erp->startdev;
1da177e4
LT		 1573
1574 erp->retries = 256;
1575 erp->function = dasd_3990_erp_action_10_32;
1576
fc19f381 1577 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Perform logging requested");
1da177e4
LT		 1578
1579 return erp;
1580
1581} /* end dasd_3990_erp_action_10_32 */
1582
1583/*
1584 * DASD_3990_ERP_ACTION_1B_32
1585 *
1586 * DESCRIPTION
1587 * Handles 32 byte 'Action 1B' of Single Program Action Codes.
138c014d 1588 * A write operation could not be finished because of an unexpected
1da177e4 1589 * condition.
138c014d
HH		 1590 * The already created 'default erp' is used to get the link to
1591 * the erp chain, but it can not be used for this recovery
1da177e4
LT		 1592 * action because it contains no DE/LO data space.
1593 *
1594 * PARAMETER
1595 * default_erp already added default erp.
138c014d 1596 * sense current sense data
1da177e4
LT		 1597 *
1598 * RETURN VALUES
138c014d 1599 * erp new erp or
1da177e4
LT		 1600 * default_erp in case of imprecise ending or error
1601 */
1602static struct dasd_ccw_req *
1603dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1604{
1605
8e09f215 1606 struct dasd_device *device = default_erp->startdev;
1da177e4
LT		 1607 __u32 cpa = 0;
1608 struct dasd_ccw_req *cqr;
1609 struct dasd_ccw_req *erp;
1610 struct DE_eckd_data *DE_data;
8e09f215 1611 struct PFX_eckd_data *PFX_data;
1da177e4 1612 char *LO_data; /* LO_eckd_data_t */
8e09f215 1613 struct ccw1 *ccw, *oldccw;
1da177e4 1614
fc19f381 1615 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1616 "Write not finished because of unexpected condition");
1617
1618 default_erp->function = dasd_3990_erp_action_1B_32;
1619
1620 /* determine the original cqr */
1621 cqr = default_erp;
1622
1623 while (cqr->refers != NULL) {
1624 cqr = cqr->refers;
1625 }
1626
f3eb5384
SW		 1627 if (scsw_is_tm(&cqr->irb.scsw)) {
1628 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1629 "32 bit sense, action 1B is not defined"
1630 " in transport mode - just retry");
1631 return default_erp;
1632 }
1633
1da177e4
LT		 1634 /* for imprecise ending just do default erp */
1635 if (sense[1] & 0x01) {
fc19f381 1636 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1637 "Imprecise ending is set - just retry");
1638
1639 return default_erp;
1640 }
1641
1642 /* determine the address of the CCW to be restarted */
1643 /* Imprecise ending is not set -> addr from IRB-SCSW */
23d805b6 1644 cpa = default_erp->refers->irb.scsw.cmd.cpa;
1da177e4
LT		 1645
1646 if (cpa == 0) {
fc19f381 1647 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1648 "Unable to determine address of the CCW "
1649 "to be restarted");
1650
1651 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1652 }
1653
1654 /* Build new ERP request including DE/LO */
1655 erp = dasd_alloc_erp_request((char *) &cqr->magic,
1656 2 + 1,/* DE/LO + TIC */
8e09f215
SW		 1657 sizeof(struct DE_eckd_data) +
1658 sizeof(struct LO_eckd_data), device);
1da177e4
LT		 1659
1660 if (IS_ERR(erp)) {
fc19f381
SH		 1661 /* internal error 01 - Unable to allocate ERP */
1662 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1663 "device driver, reason=%s\n", "01");
1da177e4
LT		 1664 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1665 }
1666
1667 /* use original DE */
1668 DE_data = erp->data;
8e09f215
SW		 1669 oldccw = cqr->cpaddr;
1670 if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) {
1671 PFX_data = cqr->data;
f3eb5384 1672 memcpy(DE_data, &PFX_data->define_extent,
8e09f215
SW		 1673 sizeof(struct DE_eckd_data));
1674 } else
1675 memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data));
1da177e4
LT		 1676
1677 /* create LO */
8e09f215 1678 LO_data = erp->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1679
1680 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
fc19f381 1681 /* should not */
1da177e4
LT		 1682 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1683 }
1684
1685 if ((sense[7] & 0x3F) == 0x01) {
1686 /* operation code is WRITE DATA -> data area orientation */
1687 LO_data[0] = 0x81;
1688
1689 } else if ((sense[7] & 0x3F) == 0x03) {
1690 /* operation code is FORMAT WRITE -> index orientation */
1691 LO_data[0] = 0xC3;
1692
1693 } else {
1694 LO_data[0] = sense[7]; /* operation */
1695 }
1696
1697 LO_data[1] = sense[8]; /* auxiliary */
1698 LO_data[2] = sense[9];
1699 LO_data[3] = sense[3]; /* count */
1700 LO_data[4] = sense[29]; /* seek_addr.cyl */
1701 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1702 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1703
1704 memcpy(&(LO_data[8]), &(sense[11]), 8);
1705
1706 /* create DE ccw */
1707 ccw = erp->cpaddr;
8e09f215 1708 memset(ccw, 0, sizeof(struct ccw1));
1da177e4
LT		 1709 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
1710 ccw->flags = CCW_FLAG_CC;
1711 ccw->count = 16;
1712 ccw->cda = (__u32)(addr_t) DE_data;
1713
1714 /* create LO ccw */
1715 ccw++;
8e09f215 1716 memset(ccw, 0, sizeof(struct ccw1));
1da177e4
LT		 1717 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
1718 ccw->flags = CCW_FLAG_CC;
1719 ccw->count = 16;
1720 ccw->cda = (__u32)(addr_t) LO_data;
1721
1722 /* TIC to the failed ccw */
1723 ccw++;
1724 ccw->cmd_code = CCW_CMD_TIC;
1725 ccw->cda = cpa;
1726
1727 /* fill erp related fields */
7ea8d321 1728 erp->flags = default_erp->flags;
1da177e4
LT		 1729 erp->function = dasd_3990_erp_action_1B_32;
1730 erp->refers = default_erp->refers;
8e09f215
SW		 1731 erp->startdev = device;
1732 erp->memdev = device;
1da177e4 1733 erp->magic = default_erp->magic;
1afcfd59 1734 erp->expires = default_erp->expires;
1da177e4 1735 erp->retries = 256;
1aae0560 1736 erp->buildclk = get_tod_clock();
1da177e4
LT		 1737 erp->status = DASD_CQR_FILLED;
1738
1739 /* remove the default erp */
1740 dasd_free_erp_request(default_erp, device);
1741
1742 return erp;
1743
1744} /* end dasd_3990_erp_action_1B_32 */
1745
1746/*
1747 * DASD_3990_UPDATE_1B
1748 *
1749 * DESCRIPTION
138c014d 1750 * Handles the update to the 32 byte 'Action 1B' of Single Program
1da177e4
LT		 1751 * Action Codes in case the first action was not successful.
1752 * The already created 'previous_erp' is the currently not successful
138c014d 1753 * ERP.
1da177e4
LT		 1754 *
1755 * PARAMETER
1756 * previous_erp already created previous erp.
138c014d 1757 * sense current sense data
1da177e4 1758 * RETURN VALUES
138c014d 1759 * erp modified erp
1da177e4
LT		 1760 */
1761static struct dasd_ccw_req *
1762dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
1763{
1764
8e09f215 1765 struct dasd_device *device = previous_erp->startdev;
1da177e4
LT		 1766 __u32 cpa = 0;
1767 struct dasd_ccw_req *cqr;
1768 struct dasd_ccw_req *erp;
1769 char *LO_data; /* struct LO_eckd_data */
1770 struct ccw1 *ccw;
1771
fc19f381 1772 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1773 "Write not finished because of unexpected condition"
1774 " - follow on");
1775
1776 /* determine the original cqr */
1777 cqr = previous_erp;
1778
1779 while (cqr->refers != NULL) {
1780 cqr = cqr->refers;
1781 }
1782
f3eb5384
SW		 1783 if (scsw_is_tm(&cqr->irb.scsw)) {
1784 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1785 "32 bit sense, action 1B, update,"
1786 " in transport mode - just retry");
1787 return previous_erp;
1788 }
1789
1da177e4
LT		 1790 /* for imprecise ending just do default erp */
1791 if (sense[1] & 0x01) {
fc19f381 1792 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 1793 "Imprecise ending is set - just retry");
1794
8e09f215 1795 previous_erp->status = DASD_CQR_FILLED;
1da177e4
LT		 1796
1797 return previous_erp;
1798 }
1799
1800 /* determine the address of the CCW to be restarted */
1801 /* Imprecise ending is not set -> addr from IRB-SCSW */
23d805b6 1802 cpa = previous_erp->irb.scsw.cmd.cpa;
1da177e4
LT		 1803
1804 if (cpa == 0) {
fc19f381
SH		 1805 /* internal error 02 -
1806 Unable to determine address of the CCW to be restarted */
1807 dev_err(&device->cdev->dev, "An error occurred in the DASD "
1808 "device driver, reason=%s\n", "02");
1da177e4
LT		 1809
1810 previous_erp->status = DASD_CQR_FAILED;
1811
1812 return previous_erp;
1813 }
1814
1815 erp = previous_erp;
1816
1817 /* update the LO with the new returned sense data */
8e09f215 1818 LO_data = erp->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1819
1820 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
fc19f381 1821 /* should not happen */
1da177e4
LT		 1822 previous_erp->status = DASD_CQR_FAILED;
1823
1824 return previous_erp;
1825 }
1826
1827 if ((sense[7] & 0x3F) == 0x01) {
1828 /* operation code is WRITE DATA -> data area orientation */
1829 LO_data[0] = 0x81;
1830
1831 } else if ((sense[7] & 0x3F) == 0x03) {
1832 /* operation code is FORMAT WRITE -> index orientation */
1833 LO_data[0] = 0xC3;
1834
1835 } else {
1836 LO_data[0] = sense[7]; /* operation */
1837 }
1838
1839 LO_data[1] = sense[8]; /* auxiliary */
1840 LO_data[2] = sense[9];
1841 LO_data[3] = sense[3]; /* count */
1842 LO_data[4] = sense[29]; /* seek_addr.cyl */
1843 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
1844 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
1845
1846 memcpy(&(LO_data[8]), &(sense[11]), 8);
1847
1848 /* TIC to the failed ccw */
1849 ccw = erp->cpaddr; /* addr of DE ccw */
1850 ccw++; /* addr of LE ccw */
1851 ccw++; /* addr of TIC ccw */
1852 ccw->cda = cpa;
1853
8e09f215 1854 erp->status = DASD_CQR_FILLED;
1da177e4
LT		 1855
1856 return erp;
1857
1858} /* end dasd_3990_update_1B */
1859
1860/*
138c014d 1861 * DASD_3990_ERP_COMPOUND_RETRY
1da177e4
LT		 1862 *
1863 * DESCRIPTION
1864 * Handles the compound ERP action retry code.
1865 * NOTE: At least one retry is done even if zero is specified
1866 * by the sense data. This makes enqueueing of the request
1867 * easier.
1868 *
1869 * PARAMETER
1870 * sense sense data of the actual error
1871 * erp pointer to the currently created ERP
1872 *
1873 * RETURN VALUES
1874 * erp modified ERP pointer
1875 *
1876 */
1877static void
1878dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense)
1879{
1880
1881 switch (sense[25] & 0x03) {
1882 case 0x00: /* no not retry */
1883 erp->retries = 1;
1884 break;
1885
1886 case 0x01: /* retry 2 times */
1887 erp->retries = 2;
1888 break;
1889
1890 case 0x02: /* retry 10 times */
1891 erp->retries = 10;
1892 break;
1893
1894 case 0x03: /* retry 256 times */
1895 erp->retries = 256;
1896 break;
1897
1898 default:
1899 BUG();
1900 }
1901
1902 erp->function = dasd_3990_erp_compound_retry;
1903
1904} /* end dasd_3990_erp_compound_retry */
1905
1906/*
138c014d 1907 * DASD_3990_ERP_COMPOUND_PATH
1da177e4
LT		 1908 *
1909 * DESCRIPTION
1910 * Handles the compound ERP action for retry on alternate
1911 * channel path.
1912 *
1913 * PARAMETER
1914 * sense sense data of the actual error
1915 * erp pointer to the currently created ERP
1916 *
1917 * RETURN VALUES
1918 * erp modified ERP pointer
1919 *
1920 */
1921static void
1922dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
1923{
1da177e4
LT		 1924 if (sense[25] & DASD_SENSE_BIT_3) {
1925 dasd_3990_erp_alternate_path(erp);
1926
a4d26c6a
SW		 1927 if (erp->status == DASD_CQR_FAILED &&
1928 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) {
138c014d 1929 /* reset the lpm and the status to be able to
1da177e4 1930 * try further actions. */
c9346151 1931 erp->lpm = dasd_path_get_opm(erp->startdev);
8e09f215 1932 erp->status = DASD_CQR_NEED_ERP;
1da177e4
LT		 1933 }
1934 }
1935
1936 erp->function = dasd_3990_erp_compound_path;
1937
1938} /* end dasd_3990_erp_compound_path */
1939
1940/*
138c014d 1941 * DASD_3990_ERP_COMPOUND_CODE
1da177e4
LT		 1942 *
1943 * DESCRIPTION
1944 * Handles the compound ERP action for retry code.
1945 *
1946 * PARAMETER
1947 * sense sense data of the actual error
1948 * erp pointer to the currently created ERP
1949 *
1950 * RETURN VALUES
1951 * erp NEW ERP pointer
1952 *
1953 */
1954static struct dasd_ccw_req *
1955dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense)
1956{
1957
1958 if (sense[25] & DASD_SENSE_BIT_2) {
1959
1960 switch (sense[28]) {
1961 case 0x17:
138c014d 1962 /* issue a Diagnostic Control command with an
3a4fa0a2 1963 * Inhibit Write subcommand and controller modifier */
1da177e4
LT		 1964 erp = dasd_3990_erp_DCTL(erp, 0x20);
1965 break;
138c014d 1966
1da177e4
LT		 1967 case 0x25:
1968 /* wait for 5 seconds and retry again */
1969 erp->retries = 1;
138c014d 1970
1da177e4
LT		 1971 dasd_3990_erp_block_queue (erp, 5*HZ);
1972 break;
138c014d 1973
1da177e4
LT		 1974 default:
1975 /* should not happen - continue */
1976 break;
1977 }
1978 }
1979
1980 erp->function = dasd_3990_erp_compound_code;
1981
1982 return erp;
1983
1984} /* end dasd_3990_erp_compound_code */
1985
1986/*
138c014d 1987 * DASD_3990_ERP_COMPOUND_CONFIG
1da177e4
LT		 1988 *
1989 * DESCRIPTION
1990 * Handles the compound ERP action for configruation
1991 * dependent error.
1992 * Note: duplex handling is not implemented (yet).
1993 *
1994 * PARAMETER
1995 * sense sense data of the actual error
1996 * erp pointer to the currently created ERP
1997 *
1998 * RETURN VALUES
1999 * erp modified ERP pointer
2000 *
2001 */
2002static void
2003dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
2004{
2005
2006 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) {
2007
fc19f381
SH		 2008 /* set to suspended duplex state then restart
2009 internal error 05 - Set device to suspended duplex state
2010 should be done */
8e09f215 2011 struct dasd_device *device = erp->startdev;
fc19f381
SH		 2012 dev_err(&device->cdev->dev,
2013 "An error occurred in the DASD device driver, "
2014 "reason=%s\n", "05");
1da177e4
LT		 2015
2016 }
2017
2018 erp->function = dasd_3990_erp_compound_config;
2019
2020} /* end dasd_3990_erp_compound_config */
2021
2022/*
138c014d 2023 * DASD_3990_ERP_COMPOUND
1da177e4
LT		 2024 *
2025 * DESCRIPTION
138c014d 2026 * Does the further compound program action if
1da177e4
LT		 2027 * compound retry was not successful.
2028 *
2029 * PARAMETER
2030 * sense sense data of the actual error
2031 * erp pointer to the current (failed) ERP
2032 *
2033 * RETURN VALUES
2034 * erp (additional) ERP pointer
2035 *
2036 */
2037static struct dasd_ccw_req *
2038dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense)
2039{
2040
2041 if ((erp->function == dasd_3990_erp_compound_retry) &&
8e09f215 2042 (erp->status == DASD_CQR_NEED_ERP)) {
1da177e4
LT		 2043
2044 dasd_3990_erp_compound_path(erp, sense);
2045 }
2046
2047 if ((erp->function == dasd_3990_erp_compound_path) &&
8e09f215 2048 (erp->status == DASD_CQR_NEED_ERP)) {
1da177e4
LT		 2049
2050 erp = dasd_3990_erp_compound_code(erp, sense);
2051 }
2052
2053 if ((erp->function == dasd_3990_erp_compound_code) &&
8e09f215 2054 (erp->status == DASD_CQR_NEED_ERP)) {
1da177e4
LT		 2055
2056 dasd_3990_erp_compound_config(erp, sense);
2057 }
2058
2059 /* if no compound action ERP specified, the request failed */
8e09f215 2060 if (erp->status == DASD_CQR_NEED_ERP)
1da177e4 2061 erp->status = DASD_CQR_FAILED;
1da177e4
LT		 2062
2063 return erp;
2064
2065} /* end dasd_3990_erp_compound */
2066
f60c768c
SH		 2067/*
2068 *DASD_3990_ERP_HANDLE_SIM
2069 *
2070 *DESCRIPTION
2071 * inspects the SIM SENSE data and starts an appropriate action
2072 *
2073 * PARAMETER
2074 * sense sense data of the actual error
2075 *
2076 * RETURN VALUES
2077 * none
2078 */
2079void
2080dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense)
2081{
2082 /* print message according to log or message to operator mode */
2083 if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) {
f60c768c 2084 /* print SIM SRC from RefCode */
fc19f381
SH		 2085 dev_err(&device->cdev->dev, "SIM - SRC: "
2086 "%02x%02x%02x%02x\n", sense[22],
f60c768c
SH		 2087 sense[23], sense[11], sense[12]);
2088 } else if (sense[24] & DASD_SIM_LOG) {
2089 /* print SIM SRC Refcode */
fc19f381
SH		 2090 dev_warn(&device->cdev->dev, "log SIM - SRC: "
2091 "%02x%02x%02x%02x\n", sense[22],
f60c768c
SH		 2092 sense[23], sense[11], sense[12]);
2093 }
2094}
2095
1da177e4 2096/*
138c014d 2097 * DASD_3990_ERP_INSPECT_32
1da177e4
LT		 2098 *
2099 * DESCRIPTION
2100 * Does a detailed inspection of the 32 byte sense data
138c014d 2101 * and sets up a related error recovery action.
1da177e4
LT		 2102 *
2103 * PARAMETER
2104 * sense sense data of the actual error
2105 * erp pointer to the currently created default ERP
2106 *
2107 * RETURN VALUES
2108 * erp_filled pointer to the ERP
2109 *
2110 */
2111static struct dasd_ccw_req *
2112dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
2113{
2114
8e09f215 2115 struct dasd_device *device = erp->startdev;
1da177e4
LT		 2116
2117 erp->function = dasd_3990_erp_inspect_32;
2118
f60c768c
SH		 2119 /* check for SIM sense data */
2120 if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)
2121 dasd_3990_erp_handle_sim(device, sense);
2122
1da177e4
LT		 2123 if (sense[25] & DASD_SENSE_BIT_0) {
2124
2125 /* compound program action codes (byte25 bit 0 == '1') */
2126 dasd_3990_erp_compound_retry(erp, sense);
2127
2128 } else {
2129
2130 /* single program action codes (byte25 bit 0 == '0') */
2131 switch (sense[25]) {
2132
2133 case 0x00: /* success - use default ERP for retries */
fc19f381 2134 DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
1da177e4
LT		 2135 "ERP called for successful request"
2136 " - just retry");
2137 break;
2138
2139 case 0x01: /* fatal error */
fc19f381
SH		 2140 dev_err(&device->cdev->dev,
2141 "ERP failed for the DASD\n");
1da177e4
LT		 2142
2143 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2144 break;
2145
2146 case 0x02: /* intervention required */
2147 case 0x03: /* intervention required during dual copy */
2148 erp = dasd_3990_erp_int_req(erp);
2149 break;
2150
fc19f381
SH		 2151 case 0x0F: /* length mismatch during update write command
2152 internal error 08 - update write command error*/
2153 dev_err(&device->cdev->dev, "An error occurred in the "
2154 "DASD device driver, reason=%s\n", "08");
1da177e4
LT		 2155
2156 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2157 break;
2158
2159 case 0x10: /* logging required for other channel program */
2160 erp = dasd_3990_erp_action_10_32(erp, sense);
2161 break;
2162
fc19f381
SH		 2163 case 0x15: /* next track outside defined extend
2164 internal error 07 - The next track is not
2165 within the defined storage extent */
2166 dev_err(&device->cdev->dev,
2167 "An error occurred in the DASD device driver, "
2168 "reason=%s\n", "07");
1da177e4
LT		 2169
2170 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2171 break;
2172
2173 case 0x1B: /* unexpected condition during write */
2174
2175 erp = dasd_3990_erp_action_1B_32(erp, sense);
2176 break;
2177
2178 case 0x1C: /* invalid data */
fc19f381 2179 dev_emerg(&device->cdev->dev,
1da177e4 2180 "Data recovered during retry with PCI "
fc19f381 2181 "fetch mode active\n");
1da177e4
LT		 2182
2183 /* not possible to handle this situation in Linux */
2184 panic
2185 ("Invalid data - No way to inform application "
2186 "about the possibly incorrect data");
2187 break;
2188
2189 case 0x1D: /* state-change pending */
fc19f381 2190 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2191 "A State change pending condition exists "
2192 "for the subsystem or device");
2193
2194 erp = dasd_3990_erp_action_4(erp, sense);
2195 break;
2196
2197 case 0x1E: /* busy */
fc19f381 2198 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2199 "Busy condition exists "
2200 "for the subsystem or device");
2201 erp = dasd_3990_erp_action_4(erp, sense);
2202 break;
2203
2204 default: /* all others errors - default erp */
2205 break;
2206 }
2207 }
2208
2209 return erp;
2210
2211} /* end dasd_3990_erp_inspect_32 */
2212
a521b048
SH		 2213static void dasd_3990_erp_disable_path(struct dasd_device *device, __u8 lpum)
2214{
2215 int pos = pathmask_to_pos(lpum);
2216
2217 /* no remaining path, cannot disable */
2218 if (!(dasd_path_get_opm(device) & ~lpum))
2219 return;
2220
2221 dev_err(&device->cdev->dev,
2222 "Path %x.%02x (pathmask %02x) is disabled - IFCC threshold exceeded\n",
2223 device->path[pos].cssid, device->path[pos].chpid, lpum);
2224 dasd_path_remove_opm(device, lpum);
2225 dasd_path_add_ifccpm(device, lpum);
2226 device->path[pos].errorclk = 0;
2227 atomic_set(&device->path[pos].error_count, 0);
2228}
2229
2230static void dasd_3990_erp_account_error(struct dasd_ccw_req *erp)
2231{
2232 struct dasd_device *device = erp->startdev;
2233 __u8 lpum = erp->refers->irb.esw.esw1.lpum;
2234 int pos = pathmask_to_pos(lpum);
7bf76f01 2235 unsigned long clk;
a521b048
SH		 2236
2237 if (!device->path_thrhld)
2238 return;
2239
2240 clk = get_tod_clock();
2241 /*
2242 * check if the last error is longer ago than the timeout,
2243 * if so reset error state
2244 */
2245 if ((tod_to_ns(clk - device->path[pos].errorclk) / NSEC_PER_SEC)
2246 >= device->path_interval) {
2247 atomic_set(&device->path[pos].error_count, 0);
2248 device->path[pos].errorclk = 0;
2249 }
2250 atomic_inc(&device->path[pos].error_count);
2251 device->path[pos].errorclk = clk;
2252 /* threshold exceeded disable path if possible */
2253 if (atomic_read(&device->path[pos].error_count) >=
2254 device->path_thrhld)
2255 dasd_3990_erp_disable_path(device, lpum);
2256}
2257
1da177e4 2258/*
138c014d 2259 *****************************************************************************
eef35c2d 2260 * main ERP control functions (24 and 32 byte sense)
138c014d 2261 *****************************************************************************
1da177e4
LT		 2262 */
2263
6c5f57c7
SH		 2264/*
2265 * DASD_3990_ERP_CONTROL_CHECK
2266 *
2267 * DESCRIPTION
25985edc 2268 * Does a generic inspection if a control check occurred and sets up
6c5f57c7
SH		 2269 * the related error recovery procedure
2270 *
2271 * PARAMETER
2272 * erp pointer to the currently created default ERP
2273 *
2274 * RETURN VALUES
2275 * erp_filled pointer to the erp
2276 */
2277
2278static struct dasd_ccw_req *
2279dasd_3990_erp_control_check(struct dasd_ccw_req *erp)
2280{
2281 struct dasd_device *device = erp->startdev;
2282
f3eb5384 2283 if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK
6c5f57c7 2284 | SCHN_STAT_CHN_CTRL_CHK)) {
fc19f381 2285 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6c5f57c7 2286 "channel or interface control check");
a521b048 2287 dasd_3990_erp_account_error(erp);
6c5f57c7
SH		 2288 erp = dasd_3990_erp_action_4(erp, NULL);
2289 }
2290 return erp;
2291}
2292
1da177e4
LT		 2293/*
2294 * DASD_3990_ERP_INSPECT
2295 *
2296 * DESCRIPTION
2297 * Does a detailed inspection for sense data by calling either
2298 * the 24-byte or the 32-byte inspection routine.
2299 *
2300 * PARAMETER
2301 * erp pointer to the currently created default ERP
2302 * RETURN VALUES
138c014d 2303 * erp_new contens was possibly modified
1da177e4
LT		 2304 */
2305static struct dasd_ccw_req *
f3eb5384 2306dasd_3990_erp_inspect(struct dasd_ccw_req *erp)
1da177e4
LT		 2307{
2308
2309 struct dasd_ccw_req *erp_new = NULL;
f3eb5384 2310 char *sense;
1da177e4 2311
25985edc 2312 /* if this problem occurred on an alias retry on base */
8e09f215
SW		 2313 erp_new = dasd_3990_erp_inspect_alias(erp);
2314 if (erp_new)
2315 return erp_new;
2316
f3eb5384
SW		 2317 /* sense data are located in the refers record of the
2318 * already set up new ERP !
2319 * check if concurrent sens is available
2320 */
2321 sense = dasd_get_sense(&erp->refers->irb);
2322 if (!sense)
6c5f57c7 2323 erp_new = dasd_3990_erp_control_check(erp);
1da177e4 2324 /* distinguish between 24 and 32 byte sense data */
6c5f57c7 2325 else if (sense[27] & DASD_SENSE_BIT_0) {
1da177e4
LT		 2326
2327 /* inspect the 24 byte sense data */
2328 erp_new = dasd_3990_erp_inspect_24(erp, sense);
2329
2330 } else {
2331
2332 /* inspect the 32 byte sense data */
2333 erp_new = dasd_3990_erp_inspect_32(erp, sense);
2334
2335 } /* end distinguish between 24 and 32 byte sense data */
2336
2337 return erp_new;
2338}
2339
2340/*
2341 * DASD_3990_ERP_ADD_ERP
138c014d 2342 *
1da177e4 2343 * DESCRIPTION
25985edc 2344 * This function adds an additional request block (ERP) to the head of
1da177e4 2345 * the given cqr (or erp).
f3eb5384
SW		 2346 * For a command mode cqr the erp is initialized as an default erp
2347 * (retry TIC).
2348 * For transport mode we make a copy of the original TCW (points to
2349 * the original TCCB, TIDALs, etc.) but give it a fresh
2350 * TSB so the original sense data will not be changed.
1da177e4
LT		 2351 *
2352 * PARAMETER
138c014d 2353 * cqr head of the current ERP-chain (or single cqr if
1da177e4
LT		 2354 * first error)
2355 * RETURN VALUES
2356 * erp pointer to new ERP-chain head
2357 */
f3eb5384 2358static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr)
1da177e4
LT		 2359{
2360
8e09f215 2361 struct dasd_device *device = cqr->startdev;
1da177e4 2362 struct ccw1 *ccw;
1da177e4 2363 struct dasd_ccw_req *erp;
f3eb5384
SW		 2364 int cplength, datasize;
2365 struct tcw *tcw;
2366 struct tsb *tsb;
2367
2368 if (cqr->cpmode == 1) {
2369 cplength = 0;
4a31ba57
SW		 2370 /* TCW needs to be 64 byte aligned, so leave enough room */
2371 datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb);
f3eb5384
SW		 2372 } else {
2373 cplength = 2;
2374 datasize = 0;
2375 }
1da177e4 2376
f3eb5384
SW		 2377 /* allocate additional request block */
2378 erp = dasd_alloc_erp_request((char *) &cqr->magic,
2379 cplength, datasize, device);
1da177e4
LT		 2380 if (IS_ERR(erp)) {
2381 if (cqr->retries <= 0) {
fc19f381 2382 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1da177e4
LT		 2383 "Unable to allocate ERP request");
2384 cqr->status = DASD_CQR_FAILED;
1aae0560 2385 cqr->stopclk = get_tod_clock();
1da177e4 2386 } else {
fc19f381 2387 DBF_DEV_EVENT(DBF_ERR, device,
1da177e4
LT		 2388 "Unable to allocate ERP request "
2389 "(%i retries left)",
2390 cqr->retries);
8e09f215 2391 dasd_block_set_timer(device->block, (HZ << 3));
1da177e4 2392 }
6a5176c4 2393 return erp;
1da177e4
LT		 2394 }
2395
eb6e199b 2396 ccw = cqr->cpaddr;
f3eb5384
SW		 2397 if (cqr->cpmode == 1) {
2398 /* make a shallow copy of the original tcw but set new tsb */
2399 erp->cpmode = 1;
4a31ba57
SW		 2400 erp->cpaddr = PTR_ALIGN(erp->data, 64);
2401 tcw = erp->cpaddr;
f3eb5384
SW		 2402 tsb = (struct tsb *) &tcw[1];
2403 *tcw = *((struct tcw *)cqr->cpaddr);
2404 tcw->tsb = (long)tsb;
eb6e199b
SW		 2405 } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) {
2406 /* PSF cannot be chained from NOOP/TIC */
2407 erp->cpaddr = cqr->cpaddr;
f3eb5384
SW		 2408 } else {
2409 /* initialize request with default TIC to current ERP/CQR */
2410 ccw = erp->cpaddr;
2411 ccw->cmd_code = CCW_CMD_NOOP;
2412 ccw->flags = CCW_FLAG_CC;
2413 ccw++;
2414 ccw->cmd_code = CCW_CMD_TIC;
2415 ccw->cda = (long)(cqr->cpaddr);
2416 }
2417
7ea8d321 2418 erp->flags = cqr->flags;
1da177e4
LT		 2419 erp->function = dasd_3990_erp_add_erp;
2420 erp->refers = cqr;
8e09f215
SW		 2421 erp->startdev = device;
2422 erp->memdev = device;
2423 erp->block = cqr->block;
1da177e4 2424 erp->magic = cqr->magic;
1afcfd59 2425 erp->expires = cqr->expires;
1da177e4 2426 erp->retries = 256;
1aae0560 2427 erp->buildclk = get_tod_clock();
1da177e4
LT		 2428 erp->status = DASD_CQR_FILLED;
2429
2430 return erp;
2431}
2432
2433/*
138c014d
HH		 2434 * DASD_3990_ERP_ADDITIONAL_ERP
2435 *
1da177e4
LT		 2436 * DESCRIPTION
2437 * An additional ERP is needed to handle the current error.
2438 * Add ERP to the head of the ERP-chain containing the ERP processing
2439 * determined based on the sense data.
2440 *
2441 * PARAMETER
138c014d 2442 * cqr head of the current ERP-chain (or single cqr if
1da177e4
LT		 2443 * first error)
2444 *
2445 * RETURN VALUES
2446 * erp pointer to new ERP-chain head
2447 */
2448static struct dasd_ccw_req *
2449dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr)
2450{
2451
2452 struct dasd_ccw_req *erp = NULL;
2453
2454 /* add erp and initialize with default TIC */
2455 erp = dasd_3990_erp_add_erp(cqr);
2456
6a5176c4
SH		 2457 if (IS_ERR(erp))
2458 return erp;
2459
1da177e4
LT		 2460 /* inspect sense, determine specific ERP if possible */
2461 if (erp != cqr) {
2462
2463 erp = dasd_3990_erp_inspect(erp);
2464 }
2465
2466 return erp;
2467
2468} /* end dasd_3990_erp_additional_erp */
2469
2470/*
2471 * DASD_3990_ERP_ERROR_MATCH
2472 *
2473 * DESCRIPTION
2474 * Check if the device status of the given cqr is the same.
2475 * This means that the failed CCW and the relevant sense data
2476 * must match.
2477 * I don't distinguish between 24 and 32 byte sense because in case of
2478 * 24 byte sense byte 25 and 27 is set as well.
2479 *
2480 * PARAMETER
138c014d 2481 * cqr1 first cqr, which will be compared with the
1da177e4
LT		 2482 * cqr2 second cqr.
2483 *
2484 * RETURN VALUES
2485 * match 'boolean' for match found
2486 * returns 1 if match found, otherwise 0.
2487 */
f3eb5384
SW		 2488static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1,
2489 struct dasd_ccw_req *cqr2)
1da177e4 2490{
f3eb5384 2491 char *sense1, *sense2;
1da177e4 2492
5c12f240
SW		 2493 if (cqr1->startdev != cqr2->startdev)
2494 return 0;
1da177e4 2495
f3eb5384
SW		 2496 sense1 = dasd_get_sense(&cqr1->irb);
2497 sense2 = dasd_get_sense(&cqr2->irb);
6c5f57c7 2498
f3eb5384
SW		 2499 /* one request has sense data, the other not -> no match, return 0 */
2500 if (!sense1 != !sense2)
2501 return 0;
2502 /* no sense data in both cases -> check cstat for IFCC */
2503 if (!sense1 && !sense2) {
2504 if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
2505 SCHN_STAT_CHN_CTRL_CHK)) ==
2506 (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
2507 SCHN_STAT_CHN_CTRL_CHK)))
6c5f57c7
SH		 2508 return 1; /* match with ifcc*/
2509 }
1da177e4 2510 /* check sense data; byte 0-2,25,27 */
f3eb5384
SW		 2511 if (!(sense1 && sense2 &&
2512 (memcmp(sense1, sense2, 3) == 0) &&
2513 (sense1[27] == sense2[27]) &&
2514 (sense1[25] == sense2[25]))) {
1da177e4
LT		 2515
2516 return 0; /* sense doesn't match */
2517 }
2518
2519 return 1; /* match */
2520
2521} /* end dasd_3990_erp_error_match */
2522
2523/*
2524 * DASD_3990_ERP_IN_ERP
2525 *
2526 * DESCRIPTION
2527 * check if the current error already happened before.
2528 * quick exit if current cqr is not an ERP (cqr->refers=NULL)
2529 *
2530 * PARAMETER
2531 * cqr failed cqr (either original cqr or already an erp)
2532 *
2533 * RETURN VALUES
138c014d 2534 * erp erp-pointer to the already defined error
1da177e4
LT		 2535 * recovery procedure OR
2536 * NULL if a 'new' error occurred.
2537 */
2538static struct dasd_ccw_req *
2539dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr)
2540{
2541
2542 struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */
2543 *erp_match = NULL; /* save erp chain head */
2544 int match = 0; /* 'boolean' for matching error found */
2545
2546 if (cqr->refers == NULL) { /* return if not in erp */
2547 return NULL;
2548 }
2549
2550 /* check the erp/cqr chain for current error */
2551 do {
2552 match = dasd_3990_erp_error_match(erp_head, cqr->refers);
2553 erp_match = cqr; /* save possible matching erp */
2554 cqr = cqr->refers; /* check next erp/cqr in queue */
2555
2556 } while ((cqr->refers != NULL) && (!match));
2557
2558 if (!match) {
2559 return NULL; /* no match was found */
2560 }
2561
2562 return erp_match; /* return address of matching erp */
2563
2564} /* END dasd_3990_erp_in_erp */
2565
2566/*
2567 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense)
2568 *
2569 * DESCRIPTION
138c014d 2570 * No retry is left for the current ERP. Check what has to be done
1da177e4
LT		 2571 * with the ERP.
2572 * - do further defined ERP action or
138c014d 2573 * - wait for interrupt or
1da177e4
LT		 2574 * - exit with permanent error
2575 *
2576 * PARAMETER
2577 * erp ERP which is in progress with no retry left
2578 *
2579 * RETURN VALUES
2580 * erp modified/additional ERP
2581 */
2582static struct dasd_ccw_req *
2583dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
2584{
2585
8e09f215 2586 struct dasd_device *device = erp->startdev;
f3eb5384 2587 char *sense = dasd_get_sense(&erp->irb);
1da177e4
LT		 2588
2589 /* check for 24 byte sense ERP */
2590 if ((erp->function == dasd_3990_erp_bus_out) ||
2591 (erp->function == dasd_3990_erp_action_1) ||
2592 (erp->function == dasd_3990_erp_action_4)) {
2593
2594 erp = dasd_3990_erp_action_1(erp);
2595
eb6e199b
SW		 2596 } else if (erp->function == dasd_3990_erp_action_1_sec) {
2597 erp = dasd_3990_erp_action_1_sec(erp);
1da177e4
LT		 2598 } else if (erp->function == dasd_3990_erp_action_5) {
2599
2600 /* retries have not been successful */
2601 /* prepare erp for retry on different channel path */
2602 erp = dasd_3990_erp_action_1(erp);
2603
f3eb5384 2604 if (sense && !(sense[2] & DASD_SENSE_BIT_0)) {
1da177e4 2605
138c014d 2606 /* issue a Diagnostic Control command with an
1da177e4
LT		 2607 * Inhibit Write subcommand */
2608
2609 switch (sense[25]) {
2610 case 0x17:
2611 case 0x57:{ /* controller */
2612 erp = dasd_3990_erp_DCTL(erp, 0x20);
2613 break;
2614 }
2615 case 0x18:
2616 case 0x58:{ /* channel path */
2617 erp = dasd_3990_erp_DCTL(erp, 0x40);
2618 break;
2619 }
2620 case 0x19:
2621 case 0x59:{ /* storage director */
2622 erp = dasd_3990_erp_DCTL(erp, 0x80);
2623 break;
2624 }
2625 default:
fc19f381 2626 DBF_DEV_EVENT(DBF_WARNING, device,
1da177e4
LT		 2627 "invalid subcommand modifier 0x%x "
2628 "for Diagnostic Control Command",
2629 sense[25]);
2630 }
2631 }
2632
2633 /* check for 32 byte sense ERP */
f3eb5384
SW		 2634 } else if (sense &&
2635 ((erp->function == dasd_3990_erp_compound_retry) ||
2636 (erp->function == dasd_3990_erp_compound_path) ||
2637 (erp->function == dasd_3990_erp_compound_code) ||
2638 (erp->function == dasd_3990_erp_compound_config))) {
1da177e4
LT		 2639
2640 erp = dasd_3990_erp_compound(erp, sense);
2641
2642 } else {
fc19f381
SH		 2643 /*
2644 * No retry left and no additional special handling
2645 * necessary
2646 */
2647 dev_err(&device->cdev->dev,
2648 "ERP %p has run out of retries and failed\n", erp);
1da177e4
LT		 2649
2650 erp->status = DASD_CQR_FAILED;
2651 }
2652
2653 return erp;
2654
2655} /* end dasd_3990_erp_further_erp */
2656
2657/*
138c014d 2658 * DASD_3990_ERP_HANDLE_MATCH_ERP
1da177e4
LT		 2659 *
2660 * DESCRIPTION
2661 * An error occurred again and an ERP has been detected which is already
138c014d 2662 * used to handle this error (e.g. retries).
1da177e4
LT		 2663 * All prior ERP's are asumed to be successful and therefore removed
2664 * from queue.
138c014d 2665 * If retry counter of matching erp is already 0, it is checked if further
1da177e4
LT		 2666 * action is needed (besides retry) or if the ERP has failed.
2667 *
2668 * PARAMETER
2669 * erp_head first ERP in ERP-chain
2670 * erp ERP that handles the actual error.
2671 * (matching erp)
2672 *
2673 * RETURN VALUES
2674 * erp modified/additional ERP
2675 */
2676static struct dasd_ccw_req *
2677dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
2678 struct dasd_ccw_req *erp)
2679{
2680
8e09f215 2681 struct dasd_device *device = erp_head->startdev;
1da177e4
LT		 2682 struct dasd_ccw_req *erp_done = erp_head; /* finished req */
2683 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */
2684
2685 /* loop over successful ERPs and remove them from chanq */
2686 while (erp_done != erp) {
2687
2688 if (erp_done == NULL) /* end of chain reached */
2689 panic(PRINTK_HEADER "Programming error in ERP! The "
2690 "original request was lost\n");
2691
2692 /* remove the request from the device queue */
8e09f215 2693 list_del(&erp_done->blocklist);
1da177e4
LT		 2694
2695 erp_free = erp_done;
2696 erp_done = erp_done->refers;
2697
2698 /* free the finished erp request */
8e09f215 2699 dasd_free_erp_request(erp_free, erp_free->memdev);
1da177e4
LT		 2700
2701 } /* end while */
2702
2703 if (erp->retries > 0) {
2704
f3eb5384 2705 char *sense = dasd_get_sense(&erp->refers->irb);
1da177e4
LT		 2706
2707 /* check for special retries */
f3eb5384 2708 if (sense && erp->function == dasd_3990_erp_action_4) {
1da177e4
LT		 2709
2710 erp = dasd_3990_erp_action_4(erp, sense);
2711
f3eb5384
SW		 2712 } else if (sense &&
2713 erp->function == dasd_3990_erp_action_1B_32) {
1da177e4
LT		 2714
2715 erp = dasd_3990_update_1B(erp, sense);
2716
f3eb5384 2717 } else if (sense && erp->function == dasd_3990_erp_int_req) {
1da177e4
LT		 2718
2719 erp = dasd_3990_erp_int_req(erp);
2720
2721 } else {
2722 /* simple retry */
fc19f381 2723 DBF_DEV_EVENT(DBF_DEBUG, device,
1da177e4
LT		 2724 "%i retries left for erp %p",
2725 erp->retries, erp);
2726
2727 /* handle the request again... */
8e09f215 2728 erp->status = DASD_CQR_FILLED;
1da177e4
LT		 2729 }
2730
2731 } else {
2732 /* no retry left - check for further necessary action */
2733 /* if no further actions, handle rest as permanent error */
2734 erp = dasd_3990_erp_further_erp(erp);
2735 }
2736
2737 return erp;
2738
2739} /* end dasd_3990_erp_handle_match_erp */
2740
2741/*
2742 * DASD_3990_ERP_ACTION
2743 *
2744 * DESCRIPTION
5d67d164 2745 * control routine for 3990 erp actions.
1da177e4
LT		 2746 * Has to be called with the queue lock (namely the s390_irq_lock) acquired.
2747 *
2748 * PARAMETER
2749 * cqr failed cqr (either original cqr or already an erp)
2750 *
2751 * RETURN VALUES
2752 * erp erp-pointer to the head of the ERP action chain.
2753 * This means:
2754 * - either a ptr to an additional ERP cqr or
138c014d 2755 * - the original given cqr (which's status might
1da177e4
LT		 2756 * be modified)
2757 */
2758struct dasd_ccw_req *
2759dasd_3990_erp_action(struct dasd_ccw_req * cqr)
2760{
1da177e4 2761 struct dasd_ccw_req *erp = NULL;
8e09f215 2762 struct dasd_device *device = cqr->startdev;
9575bf26 2763 struct dasd_ccw_req *temp_erp = NULL;
1da177e4 2764
9575bf26
HH		 2765 if (device->features & DASD_FEATURE_ERPLOG) {
2766 /* print current erp_chain */
fc19f381
SH		 2767 dev_err(&device->cdev->dev,
2768 "ERP chain at BEGINNING of ERP-ACTION\n");
1da177e4
LT		 2769 for (temp_erp = cqr;
2770 temp_erp != NULL; temp_erp = temp_erp->refers) {
2771
fc19f381
SH		 2772 dev_err(&device->cdev->dev,
2773 "ERP %p (%02x) refers to %p\n",
1da177e4
LT		 2774 temp_erp, temp_erp->status,
2775 temp_erp->refers);
2776 }
2777 }
1da177e4 2778
73ac36ea 2779 /* double-check if current erp/cqr was successful */
f3eb5384
SW		 2780 if ((scsw_cstat(&cqr->irb.scsw) == 0x00) &&
2781 (scsw_dstat(&cqr->irb.scsw) ==
23d805b6 2782 (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) {
1da177e4 2783
fc19f381 2784 DBF_DEV_EVENT(DBF_DEBUG, device,
1da177e4
LT		 2785 "ERP called for successful request %p"
2786 " - NO ERP necessary", cqr);
2787
2788 cqr->status = DASD_CQR_DONE;
2789
2790 return cqr;
2791 }
1da177e4
LT		 2792
2793 /* check if error happened before */
2794 erp = dasd_3990_erp_in_erp(cqr);
2795
2796 if (erp == NULL) {
2797 /* no matching erp found - set up erp */
2798 erp = dasd_3990_erp_additional_erp(cqr);
6a5176c4
SH		 2799 if (IS_ERR(erp))
2800 return erp;
1da177e4
LT		 2801 } else {
2802 /* matching erp found - set all leading erp's to DONE */
2803 erp = dasd_3990_erp_handle_match_erp(cqr, erp);
2804 }
2805
8a9bd4f8
SH		 2806
2807 /*
2808 * For path verification work we need to stick with the path that was
2809 * originally chosen so that the per path configuration data is
2810 * assigned correctly.
2811 */
2812 if (test_bit(DASD_CQR_VERIFY_PATH, &erp->flags) && cqr->lpm) {
2813 erp->lpm = cqr->lpm;
2814 }
2815
9575bf26
HH		 2816 if (device->features & DASD_FEATURE_ERPLOG) {
2817 /* print current erp_chain */
fc19f381
SH		 2818 dev_err(&device->cdev->dev,
2819 "ERP chain at END of ERP-ACTION\n");
1da177e4
LT		 2820 for (temp_erp = erp;
2821 temp_erp != NULL; temp_erp = temp_erp->refers) {
2822
fc19f381
SH		 2823 dev_err(&device->cdev->dev,
2824 "ERP %p (%02x) refers to %p\n",
1da177e4
LT		 2825 temp_erp, temp_erp->status,
2826 temp_erp->refers);
2827 }
2828 }
1da177e4 2829
8e09f215
SW		 2830 /* enqueue ERP request if it's a new one */
2831 if (list_empty(&erp->blocklist)) {
2832 cqr->status = DASD_CQR_IN_ERP;
2833 /* add erp request before the cqr */
2834 list_add_tail(&erp->blocklist, &cqr->blocklist);
1da177e4
LT		 2835 }
2836
fc19f381
SH		 2837
2838
1da177e4
LT		 2839 return erp;
2840
2841} /* end dasd_3990_erp_action */
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