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dasd_3990_erp.c
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linux-6.19.14/drivers/s390/block/dasd_3990_erp.c
1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Author(s)......: Horst Hummel <Horst.Hummel@de.ibm.com> 4 * Holger Smolinski <Holger.Smolinski@de.ibm.com> 5 * Bugreports.to..: <Linux390@de.ibm.com> 6 * Copyright IBM Corp. 2000, 2001 7 * 8 */ 9 10#include <linux/timer.h> 11#include <asm/idals.h> 12 13#include "dasd_int.h" 14#include "dasd_eckd.h" 15 16 17struct DCTL_data { 18 unsigned char subcommand; /* e.g Inhibit Write, Enable Write,... */ 19 unsigned char modifier; /* Subcommand modifier */ 20 unsigned short res; /* reserved */ 21} __attribute__ ((packed)); 22 23/* 24 ***************************************************************************** 25 * SECTION ERP HANDLING 26 ***************************************************************************** 27 */ 28/* 29 ***************************************************************************** 30 * 24 and 32 byte sense ERP functions 31 ***************************************************************************** 32 */ 33 34/* 35 * DASD_3990_ERP_CLEANUP 36 * 37 * DESCRIPTION 38 * Removes the already build but not necessary ERP request and sets 39 * the status of the original cqr / erp to the given (final) status 40 * 41 * PARAMETER 42 * erp request to be blocked 43 * final_status either DASD_CQR_DONE or DASD_CQR_FAILED 44 * 45 * RETURN VALUES 46 * cqr original cqr 47 */ 48static struct dasd_ccw_req * 49dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status) 50{ 51 struct dasd_ccw_req *cqr = erp->refers; 52 53 dasd_free_erp_request(erp, erp->memdev); 54 cqr->status = final_status; 55 return cqr; 56 57} /* end dasd_3990_erp_cleanup */ 58 59/* 60 * DASD_3990_ERP_BLOCK_QUEUE 61 * 62 * DESCRIPTION 63 * Block the given device request queue to prevent from further 64 * processing until the started timer has expired or an related 65 * interrupt was received. 66 */ 67static void dasd_3990_erp_block_queue(struct dasd_ccw_req *erp, int expires) 68{ 69 70 struct dasd_device *device = erp->startdev; 71 unsigned long flags; 72 73 DBF_DEV_EVENT(DBF_INFO, device, 74 "blocking request queue for %is", expires/HZ); 75 76 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 77 dasd_device_set_stop_bits(device, DASD_STOPPED_PENDING); 78 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 79 erp->status = DASD_CQR_FILLED; 80 if (erp->block) 81 dasd_block_set_timer(erp->block, expires); 82 else 83 dasd_device_set_timer(device, expires); 84} 85 86/* 87 * DASD_3990_ERP_INT_REQ 88 * 89 * DESCRIPTION 90 * Handles 'Intervention Required' error. 91 * This means either device offline or not installed. 92 * 93 * PARAMETER 94 * erp current erp 95 * RETURN VALUES 96 * erp modified erp 97 */ 98static struct dasd_ccw_req * 99dasd_3990_erp_int_req(struct dasd_ccw_req * erp) 100{ 101 102 struct dasd_device *device = erp->startdev; 103 104 /* first time set initial retry counter and erp_function */ 105 /* and retry once without blocking queue */ 106 /* (this enables easier enqueing of the cqr) */ 107 if (erp->function != dasd_3990_erp_int_req) { 108 109 erp->retries = 256; 110 erp->function = dasd_3990_erp_int_req; 111 112 } else { 113 114 /* issue a message and wait for 'device ready' interrupt */ 115 dev_err(&device->cdev->dev, 116 "is offline or not installed - " 117 "INTERVENTION REQUIRED!!\n"); 118 119 dasd_3990_erp_block_queue(erp, 60*HZ); 120 } 121 122 return erp; 123 124} /* end dasd_3990_erp_int_req */ 125 126/* 127 * DASD_3990_ERP_ALTERNATE_PATH 128 * 129 * DESCRIPTION 130 * Repeat the operation on a different channel path. 131 * If all alternate paths have been tried, the request is posted with a 132 * permanent error. 133 * 134 * PARAMETER 135 * erp pointer to the current ERP 136 * 137 * RETURN VALUES 138 * erp modified pointer to the ERP 139 */ 140static void 141dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp) 142{ 143 struct dasd_device *device = erp->startdev; 144 __u8 opm; 145 unsigned long flags; 146 147 /* try alternate valid path */ 148 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 149 opm = ccw_device_get_path_mask(device->cdev); 150 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 151 if (erp->lpm == 0) 152 erp->lpm = dasd_path_get_opm(device) & 153 ~(erp->irb.esw.esw0.sublog.lpum); 154 else 155 erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum); 156 157 if ((erp->lpm & opm) != 0x00) { 158 159 DBF_DEV_EVENT(DBF_WARNING, device, 160 "try alternate lpm=%x (lpum=%x / opm=%x)", 161 erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm); 162 163 /* reset status to submit the request again... */ 164 erp->status = DASD_CQR_FILLED; 165 erp->retries = 10; 166 } else { 167 dev_err(&device->cdev->dev, 168 "The DASD cannot be reached on any path (lpum=%x" 169 "/opm=%x)\n", erp->irb.esw.esw0.sublog.lpum, opm); 170 171 /* post request with permanent error */ 172 erp->status = DASD_CQR_FAILED; 173 } 174} /* end dasd_3990_erp_alternate_path */ 175 176/* 177 * DASD_3990_ERP_DCTL 178 * 179 * DESCRIPTION 180 * Setup cqr to do the Diagnostic Control (DCTL) command with an 181 * Inhibit Write subcommand (0x20) and the given modifier. 182 * 183 * PARAMETER 184 * erp pointer to the current (failed) ERP 185 * modifier subcommand modifier 186 * 187 * RETURN VALUES 188 * dctl_cqr pointer to NEW dctl_cqr 189 * 190 */ 191static struct dasd_ccw_req * 192dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier) 193{ 194 195 struct dasd_device *device = erp->startdev; 196 struct DCTL_data *DCTL_data; 197 struct ccw1 *ccw; 198 struct dasd_ccw_req *dctl_cqr; 199 200 dctl_cqr = dasd_alloc_erp_request(erp->magic, 1, 201 sizeof(struct DCTL_data), 202 device); 203 if (IS_ERR(dctl_cqr)) { 204 dev_err(&device->cdev->dev, 205 "Unable to allocate DCTL-CQR\n"); 206 erp->status = DASD_CQR_FAILED; 207 return erp; 208 } 209 210 DCTL_data = dctl_cqr->data; 211 212 DCTL_data->subcommand = 0x02; /* Inhibit Write */ 213 DCTL_data->modifier = modifier; 214 215 ccw = dctl_cqr->cpaddr; 216 memset(ccw, 0, sizeof(struct ccw1)); 217 ccw->cmd_code = CCW_CMD_DCTL; 218 ccw->count = 4; 219 ccw->cda = virt_to_dma32(DCTL_data); 220 dctl_cqr->flags = erp->flags; 221 dctl_cqr->function = dasd_3990_erp_DCTL; 222 dctl_cqr->refers = erp; 223 dctl_cqr->startdev = device; 224 dctl_cqr->memdev = device; 225 dctl_cqr->magic = erp->magic; 226 dctl_cqr->expires = 5 * 60 * HZ; 227 dctl_cqr->retries = 2; 228 229 dctl_cqr->buildclk = get_tod_clock(); 230 231 dctl_cqr->status = DASD_CQR_FILLED; 232 233 return dctl_cqr; 234 235} /* end dasd_3990_erp_DCTL */ 236 237/* 238 * DASD_3990_ERP_ACTION_1 239 * 240 * DESCRIPTION 241 * Setup ERP to do the ERP action 1 (see Reference manual). 242 * Repeat the operation on a different channel path. 243 * As deviation from the recommended recovery action, we reset the path mask 244 * after we have tried each path and go through all paths a second time. 245 * This will cover situations where only one path at a time is actually down, 246 * but all paths fail and recover just with the same sequence and timing as 247 * we try to use them (flapping links). 248 * If all alternate paths have been tried twice, the request is posted with 249 * a permanent error. 250 * 251 * PARAMETER 252 * erp pointer to the current ERP 253 * 254 * RETURN VALUES 255 * erp pointer to the ERP 256 * 257 */ 258static struct dasd_ccw_req *dasd_3990_erp_action_1_sec(struct dasd_ccw_req *erp) 259{ 260 erp->function = dasd_3990_erp_action_1_sec; 261 dasd_3990_erp_alternate_path(erp); 262 return erp; 263} 264 265static struct dasd_ccw_req *dasd_3990_erp_action_1(struct dasd_ccw_req *erp) 266{ 267 erp->function = dasd_3990_erp_action_1; 268 dasd_3990_erp_alternate_path(erp); 269 if (erp->status == DASD_CQR_FAILED && 270 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) { 271 erp->status = DASD_CQR_FILLED; 272 erp->retries = 10; 273 erp->lpm = dasd_path_get_opm(erp->startdev); 274 erp->function = dasd_3990_erp_action_1_sec; 275 } 276 return erp; 277} /* end dasd_3990_erp_action_1(b) */ 278 279/* 280 * DASD_3990_ERP_ACTION_4 281 * 282 * DESCRIPTION 283 * Setup ERP to do the ERP action 4 (see Reference manual). 284 * Set the current request to PENDING to block the CQR queue for that device 285 * until the state change interrupt appears. 286 * Use a timer (20 seconds) to retry the cqr if the interrupt is still 287 * missing. 288 * 289 * PARAMETER 290 * sense sense data of the actual error 291 * erp pointer to the current ERP 292 * 293 * RETURN VALUES 294 * erp pointer to the ERP 295 * 296 */ 297static struct dasd_ccw_req * 298dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense) 299{ 300 301 struct dasd_device *device = erp->startdev; 302 303 /* first time set initial retry counter and erp_function */ 304 /* and retry once without waiting for state change pending */ 305 /* interrupt (this enables easier enqueing of the cqr) */ 306 if (erp->function != dasd_3990_erp_action_4) { 307 308 DBF_DEV_EVENT(DBF_INFO, device, "%s", 309 "dasd_3990_erp_action_4: first time retry"); 310 311 erp->retries = 256; 312 erp->function = dasd_3990_erp_action_4; 313 314 } else { 315 if (sense && (sense[25] == 0x1D)) { /* state change pending */ 316 317 DBF_DEV_EVENT(DBF_INFO, device, 318 "waiting for state change pending " 319 "interrupt, %d retries left", 320 erp->retries); 321 322 dasd_3990_erp_block_queue(erp, 30*HZ); 323 324 } else if (sense && (sense[25] == 0x1E)) { /* busy */ 325 DBF_DEV_EVENT(DBF_INFO, device, 326 "busy - redriving request later, " 327 "%d retries left", 328 erp->retries); 329 dasd_3990_erp_block_queue(erp, HZ); 330 } else { 331 /* no state change pending - retry */ 332 DBF_DEV_EVENT(DBF_INFO, device, 333 "redriving request immediately, " 334 "%d retries left", 335 erp->retries); 336 erp->status = DASD_CQR_FILLED; 337 } 338 } 339 340 return erp; 341 342} /* end dasd_3990_erp_action_4 */ 343 344/* 345 ***************************************************************************** 346 * 24 byte sense ERP functions (only) 347 ***************************************************************************** 348 */ 349 350/* 351 * DASD_3990_ERP_ACTION_5 352 * 353 * DESCRIPTION 354 * Setup ERP to do the ERP action 5 (see Reference manual). 355 * NOTE: Further handling is done in xxx_further_erp after the retries. 356 * 357 * PARAMETER 358 * erp pointer to the current ERP 359 * 360 * RETURN VALUES 361 * erp pointer to the ERP 362 * 363 */ 364static struct dasd_ccw_req * 365dasd_3990_erp_action_5(struct dasd_ccw_req * erp) 366{ 367 368 /* first of all retry */ 369 erp->retries = 10; 370 erp->function = dasd_3990_erp_action_5; 371 372 return erp; 373 374} /* end dasd_3990_erp_action_5 */ 375 376/* 377 * DASD_3990_HANDLE_ENV_DATA 378 * 379 * DESCRIPTION 380 * Handles 24 byte 'Environmental data present'. 381 * Does a analysis of the sense data (message Format) 382 * and prints the error messages. 383 * 384 * PARAMETER 385 * sense current sense data 386 * 387 * RETURN VALUES 388 * void 389 */ 390static void 391dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense) 392{ 393 394 struct dasd_device *device = erp->startdev; 395 char msg_format = (sense[7] & 0xF0); 396 char msg_no = (sense[7] & 0x0F); 397 398 switch (msg_format) { 399 case 0x00: /* Format 0 - Program or System Checks */ 400 401 if (sense[1] & 0x10) { /* check message to operator bit */ 402 403 switch (msg_no) { 404 case 0x00: /* No Message */ 405 break; 406 case 0x01: 407 dev_warn(&device->cdev->dev, 408 "FORMAT 0 - Invalid Command\n"); 409 break; 410 case 0x02: 411 dev_warn(&device->cdev->dev, 412 "FORMAT 0 - Invalid Command " 413 "Sequence\n"); 414 break; 415 case 0x03: 416 dev_warn(&device->cdev->dev, 417 "FORMAT 0 - CCW Count less than " 418 "required\n"); 419 break; 420 case 0x04: 421 dev_warn(&device->cdev->dev, 422 "FORMAT 0 - Invalid Parameter\n"); 423 break; 424 case 0x05: 425 dev_warn(&device->cdev->dev, 426 "FORMAT 0 - Diagnostic of Special" 427 " Command Violates File Mask\n"); 428 break; 429 case 0x07: 430 dev_warn(&device->cdev->dev, 431 "FORMAT 0 - Channel Returned with " 432 "Incorrect retry CCW\n"); 433 break; 434 case 0x08: 435 dev_warn(&device->cdev->dev, 436 "FORMAT 0 - Reset Notification\n"); 437 break; 438 case 0x09: 439 dev_warn(&device->cdev->dev, 440 "FORMAT 0 - Storage Path Restart\n"); 441 break; 442 case 0x0A: 443 dev_warn(&device->cdev->dev, 444 "FORMAT 0 - Channel requested " 445 "... %02x\n", sense[8]); 446 break; 447 case 0x0B: 448 dev_warn(&device->cdev->dev, 449 "FORMAT 0 - Invalid Defective/" 450 "Alternate Track Pointer\n"); 451 break; 452 case 0x0C: 453 dev_warn(&device->cdev->dev, 454 "FORMAT 0 - DPS Installation " 455 "Check\n"); 456 break; 457 case 0x0E: 458 dev_warn(&device->cdev->dev, 459 "FORMAT 0 - Command Invalid on " 460 "Secondary Address\n"); 461 break; 462 case 0x0F: 463 dev_warn(&device->cdev->dev, 464 "FORMAT 0 - Status Not As " 465 "Required: reason %02x\n", 466 sense[8]); 467 break; 468 default: 469 dev_warn(&device->cdev->dev, 470 "FORMAT 0 - Reserved\n"); 471 } 472 } else { 473 switch (msg_no) { 474 case 0x00: /* No Message */ 475 break; 476 case 0x01: 477 dev_warn(&device->cdev->dev, 478 "FORMAT 0 - Device Error " 479 "Source\n"); 480 break; 481 case 0x02: 482 dev_warn(&device->cdev->dev, 483 "FORMAT 0 - Reserved\n"); 484 break; 485 case 0x03: 486 dev_warn(&device->cdev->dev, 487 "FORMAT 0 - Device Fenced - " 488 "device = %02x\n", sense[4]); 489 break; 490 case 0x04: 491 dev_warn(&device->cdev->dev, 492 "FORMAT 0 - Data Pinned for " 493 "Device\n"); 494 break; 495 default: 496 dev_warn(&device->cdev->dev, 497 "FORMAT 0 - Reserved\n"); 498 } 499 } 500 break; 501 502 case 0x10: /* Format 1 - Device Equipment Checks */ 503 switch (msg_no) { 504 case 0x00: /* No Message */ 505 break; 506 case 0x01: 507 dev_warn(&device->cdev->dev, 508 "FORMAT 1 - Device Status 1 not as " 509 "expected\n"); 510 break; 511 case 0x03: 512 dev_warn(&device->cdev->dev, 513 "FORMAT 1 - Index missing\n"); 514 break; 515 case 0x04: 516 dev_warn(&device->cdev->dev, 517 "FORMAT 1 - Interruption cannot be " 518 "reset\n"); 519 break; 520 case 0x05: 521 dev_warn(&device->cdev->dev, 522 "FORMAT 1 - Device did not respond to " 523 "selection\n"); 524 break; 525 case 0x06: 526 dev_warn(&device->cdev->dev, 527 "FORMAT 1 - Device check-2 error or Set " 528 "Sector is not complete\n"); 529 break; 530 case 0x07: 531 dev_warn(&device->cdev->dev, 532 "FORMAT 1 - Head address does not " 533 "compare\n"); 534 break; 535 case 0x08: 536 dev_warn(&device->cdev->dev, 537 "FORMAT 1 - Device status 1 not valid\n"); 538 break; 539 case 0x09: 540 dev_warn(&device->cdev->dev, 541 "FORMAT 1 - Device not ready\n"); 542 break; 543 case 0x0A: 544 dev_warn(&device->cdev->dev, 545 "FORMAT 1 - Track physical address did " 546 "not compare\n"); 547 break; 548 case 0x0B: 549 dev_warn(&device->cdev->dev, 550 "FORMAT 1 - Missing device address bit\n"); 551 break; 552 case 0x0C: 553 dev_warn(&device->cdev->dev, 554 "FORMAT 1 - Drive motor switch is off\n"); 555 break; 556 case 0x0D: 557 dev_warn(&device->cdev->dev, 558 "FORMAT 1 - Seek incomplete\n"); 559 break; 560 case 0x0E: 561 dev_warn(&device->cdev->dev, 562 "FORMAT 1 - Cylinder address did not " 563 "compare\n"); 564 break; 565 case 0x0F: 566 dev_warn(&device->cdev->dev, 567 "FORMAT 1 - Offset active cannot be " 568 "reset\n"); 569 break; 570 default: 571 dev_warn(&device->cdev->dev, 572 "FORMAT 1 - Reserved\n"); 573 } 574 break; 575 576 case 0x20: /* Format 2 - 3990 Equipment Checks */ 577 switch (msg_no) { 578 case 0x08: 579 dev_warn(&device->cdev->dev, 580 "FORMAT 2 - 3990 check-2 error\n"); 581 break; 582 case 0x0E: 583 dev_warn(&device->cdev->dev, 584 "FORMAT 2 - Support facility errors\n"); 585 break; 586 case 0x0F: 587 dev_warn(&device->cdev->dev, 588 "FORMAT 2 - Microcode detected error " 589 "%02x\n", 590 sense[8]); 591 break; 592 default: 593 dev_warn(&device->cdev->dev, 594 "FORMAT 2 - Reserved\n"); 595 } 596 break; 597 598 case 0x30: /* Format 3 - 3990 Control Checks */ 599 switch (msg_no) { 600 case 0x0F: 601 dev_warn(&device->cdev->dev, 602 "FORMAT 3 - Allegiance terminated\n"); 603 break; 604 default: 605 dev_warn(&device->cdev->dev, 606 "FORMAT 3 - Reserved\n"); 607 } 608 break; 609 610 case 0x40: /* Format 4 - Data Checks */ 611 switch (msg_no) { 612 case 0x00: 613 dev_warn(&device->cdev->dev, 614 "FORMAT 4 - Home address area error\n"); 615 break; 616 case 0x01: 617 dev_warn(&device->cdev->dev, 618 "FORMAT 4 - Count area error\n"); 619 break; 620 case 0x02: 621 dev_warn(&device->cdev->dev, 622 "FORMAT 4 - Key area error\n"); 623 break; 624 case 0x03: 625 dev_warn(&device->cdev->dev, 626 "FORMAT 4 - Data area error\n"); 627 break; 628 case 0x04: 629 dev_warn(&device->cdev->dev, 630 "FORMAT 4 - No sync byte in home address " 631 "area\n"); 632 break; 633 case 0x05: 634 dev_warn(&device->cdev->dev, 635 "FORMAT 4 - No sync byte in count address " 636 "area\n"); 637 break; 638 case 0x06: 639 dev_warn(&device->cdev->dev, 640 "FORMAT 4 - No sync byte in key area\n"); 641 break; 642 case 0x07: 643 dev_warn(&device->cdev->dev, 644 "FORMAT 4 - No sync byte in data area\n"); 645 break; 646 case 0x08: 647 dev_warn(&device->cdev->dev, 648 "FORMAT 4 - Home address area error; " 649 "offset active\n"); 650 break; 651 case 0x09: 652 dev_warn(&device->cdev->dev, 653 "FORMAT 4 - Count area error; offset " 654 "active\n"); 655 break; 656 case 0x0A: 657 dev_warn(&device->cdev->dev, 658 "FORMAT 4 - Key area error; offset " 659 "active\n"); 660 break; 661 case 0x0B: 662 dev_warn(&device->cdev->dev, 663 "FORMAT 4 - Data area error; " 664 "offset active\n"); 665 break; 666 case 0x0C: 667 dev_warn(&device->cdev->dev, 668 "FORMAT 4 - No sync byte in home " 669 "address area; offset active\n"); 670 break; 671 case 0x0D: 672 dev_warn(&device->cdev->dev, 673 "FORMAT 4 - No sync byte in count " 674 "address area; offset active\n"); 675 break; 676 case 0x0E: 677 dev_warn(&device->cdev->dev, 678 "FORMAT 4 - No sync byte in key area; " 679 "offset active\n"); 680 break; 681 case 0x0F: 682 dev_warn(&device->cdev->dev, 683 "FORMAT 4 - No sync byte in data area; " 684 "offset active\n"); 685 break; 686 default: 687 dev_warn(&device->cdev->dev, 688 "FORMAT 4 - Reserved\n"); 689 } 690 break; 691 692 case 0x50: /* Format 5 - Data Check with displacement information */ 693 switch (msg_no) { 694 case 0x00: 695 dev_warn(&device->cdev->dev, 696 "FORMAT 5 - Data Check in the " 697 "home address area\n"); 698 break; 699 case 0x01: 700 dev_warn(&device->cdev->dev, 701 "FORMAT 5 - Data Check in the count " 702 "area\n"); 703 break; 704 case 0x02: 705 dev_warn(&device->cdev->dev, 706 "FORMAT 5 - Data Check in the key area\n"); 707 break; 708 case 0x03: 709 dev_warn(&device->cdev->dev, 710 "FORMAT 5 - Data Check in the data " 711 "area\n"); 712 break; 713 case 0x08: 714 dev_warn(&device->cdev->dev, 715 "FORMAT 5 - Data Check in the " 716 "home address area; offset active\n"); 717 break; 718 case 0x09: 719 dev_warn(&device->cdev->dev, 720 "FORMAT 5 - Data Check in the count area; " 721 "offset active\n"); 722 break; 723 case 0x0A: 724 dev_warn(&device->cdev->dev, 725 "FORMAT 5 - Data Check in the key area; " 726 "offset active\n"); 727 break; 728 case 0x0B: 729 dev_warn(&device->cdev->dev, 730 "FORMAT 5 - Data Check in the data area; " 731 "offset active\n"); 732 break; 733 default: 734 dev_warn(&device->cdev->dev, 735 "FORMAT 5 - Reserved\n"); 736 } 737 break; 738 739 case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */ 740 switch (msg_no) { 741 case 0x00: 742 dev_warn(&device->cdev->dev, 743 "FORMAT 6 - Overrun on channel A\n"); 744 break; 745 case 0x01: 746 dev_warn(&device->cdev->dev, 747 "FORMAT 6 - Overrun on channel B\n"); 748 break; 749 case 0x02: 750 dev_warn(&device->cdev->dev, 751 "FORMAT 6 - Overrun on channel C\n"); 752 break; 753 case 0x03: 754 dev_warn(&device->cdev->dev, 755 "FORMAT 6 - Overrun on channel D\n"); 756 break; 757 case 0x04: 758 dev_warn(&device->cdev->dev, 759 "FORMAT 6 - Overrun on channel E\n"); 760 break; 761 case 0x05: 762 dev_warn(&device->cdev->dev, 763 "FORMAT 6 - Overrun on channel F\n"); 764 break; 765 case 0x06: 766 dev_warn(&device->cdev->dev, 767 "FORMAT 6 - Overrun on channel G\n"); 768 break; 769 case 0x07: 770 dev_warn(&device->cdev->dev, 771 "FORMAT 6 - Overrun on channel H\n"); 772 break; 773 default: 774 dev_warn(&device->cdev->dev, 775 "FORMAT 6 - Reserved\n"); 776 } 777 break; 778 779 case 0x70: /* Format 7 - Device Connection Control Checks */ 780 switch (msg_no) { 781 case 0x00: 782 dev_warn(&device->cdev->dev, 783 "FORMAT 7 - RCC initiated by a connection " 784 "check alert\n"); 785 break; 786 case 0x01: 787 dev_warn(&device->cdev->dev, 788 "FORMAT 7 - RCC 1 sequence not " 789 "successful\n"); 790 break; 791 case 0x02: 792 dev_warn(&device->cdev->dev, 793 "FORMAT 7 - RCC 1 and RCC 2 sequences not " 794 "successful\n"); 795 break; 796 case 0x03: 797 dev_warn(&device->cdev->dev, 798 "FORMAT 7 - Invalid tag-in during " 799 "selection sequence\n"); 800 break; 801 case 0x04: 802 dev_warn(&device->cdev->dev, 803 "FORMAT 7 - extra RCC required\n"); 804 break; 805 case 0x05: 806 dev_warn(&device->cdev->dev, 807 "FORMAT 7 - Invalid DCC selection " 808 "response or timeout\n"); 809 break; 810 case 0x06: 811 dev_warn(&device->cdev->dev, 812 "FORMAT 7 - Missing end operation; device " 813 "transfer complete\n"); 814 break; 815 case 0x07: 816 dev_warn(&device->cdev->dev, 817 "FORMAT 7 - Missing end operation; device " 818 "transfer incomplete\n"); 819 break; 820 case 0x08: 821 dev_warn(&device->cdev->dev, 822 "FORMAT 7 - Invalid tag-in for an " 823 "immediate command sequence\n"); 824 break; 825 case 0x09: 826 dev_warn(&device->cdev->dev, 827 "FORMAT 7 - Invalid tag-in for an " 828 "extended command sequence\n"); 829 break; 830 case 0x0A: 831 dev_warn(&device->cdev->dev, 832 "FORMAT 7 - 3990 microcode time out when " 833 "stopping selection\n"); 834 break; 835 case 0x0B: 836 dev_warn(&device->cdev->dev, 837 "FORMAT 7 - No response to selection " 838 "after a poll interruption\n"); 839 break; 840 case 0x0C: 841 dev_warn(&device->cdev->dev, 842 "FORMAT 7 - Permanent path error (DASD " 843 "controller not available)\n"); 844 break; 845 case 0x0D: 846 dev_warn(&device->cdev->dev, 847 "FORMAT 7 - DASD controller not available" 848 " on disconnected command chain\n"); 849 break; 850 default: 851 dev_warn(&device->cdev->dev, 852 "FORMAT 7 - Reserved\n"); 853 } 854 break; 855 856 case 0x80: /* Format 8 - Additional Device Equipment Checks */ 857 switch (msg_no) { 858 case 0x00: /* No Message */ 859 case 0x01: 860 dev_warn(&device->cdev->dev, 861 "FORMAT 8 - Error correction code " 862 "hardware fault\n"); 863 break; 864 case 0x03: 865 dev_warn(&device->cdev->dev, 866 "FORMAT 8 - Unexpected end operation " 867 "response code\n"); 868 break; 869 case 0x04: 870 dev_warn(&device->cdev->dev, 871 "FORMAT 8 - End operation with transfer " 872 "count not zero\n"); 873 break; 874 case 0x05: 875 dev_warn(&device->cdev->dev, 876 "FORMAT 8 - End operation with transfer " 877 "count zero\n"); 878 break; 879 case 0x06: 880 dev_warn(&device->cdev->dev, 881 "FORMAT 8 - DPS checks after a system " 882 "reset or selective reset\n"); 883 break; 884 case 0x07: 885 dev_warn(&device->cdev->dev, 886 "FORMAT 8 - DPS cannot be filled\n"); 887 break; 888 case 0x08: 889 dev_warn(&device->cdev->dev, 890 "FORMAT 8 - Short busy time-out during " 891 "device selection\n"); 892 break; 893 case 0x09: 894 dev_warn(&device->cdev->dev, 895 "FORMAT 8 - DASD controller failed to " 896 "set or reset the long busy latch\n"); 897 break; 898 case 0x0A: 899 dev_warn(&device->cdev->dev, 900 "FORMAT 8 - No interruption from device " 901 "during a command chain\n"); 902 break; 903 default: 904 dev_warn(&device->cdev->dev, 905 "FORMAT 8 - Reserved\n"); 906 } 907 break; 908 909 case 0x90: /* Format 9 - Device Read, Write, and Seek Checks */ 910 switch (msg_no) { 911 case 0x00: 912 break; /* No Message */ 913 case 0x06: 914 dev_warn(&device->cdev->dev, 915 "FORMAT 9 - Device check-2 error\n"); 916 break; 917 case 0x07: 918 dev_warn(&device->cdev->dev, 919 "FORMAT 9 - Head address did not " 920 "compare\n"); 921 break; 922 case 0x0A: 923 dev_warn(&device->cdev->dev, 924 "FORMAT 9 - Track physical address did " 925 "not compare while oriented\n"); 926 break; 927 case 0x0E: 928 dev_warn(&device->cdev->dev, 929 "FORMAT 9 - Cylinder address did not " 930 "compare\n"); 931 break; 932 default: 933 dev_warn(&device->cdev->dev, 934 "FORMAT 9 - Reserved\n"); 935 } 936 break; 937 938 case 0xF0: /* Format F - Cache Storage Checks */ 939 switch (msg_no) { 940 case 0x00: 941 dev_warn(&device->cdev->dev, 942 "FORMAT F - Operation Terminated\n"); 943 break; 944 case 0x01: 945 dev_warn(&device->cdev->dev, 946 "FORMAT F - Subsystem Processing Error\n"); 947 break; 948 case 0x02: 949 dev_warn(&device->cdev->dev, 950 "FORMAT F - Cache or nonvolatile storage " 951 "equipment failure\n"); 952 break; 953 case 0x04: 954 dev_warn(&device->cdev->dev, 955 "FORMAT F - Caching terminated\n"); 956 break; 957 case 0x06: 958 dev_warn(&device->cdev->dev, 959 "FORMAT F - Cache fast write access not " 960 "authorized\n"); 961 break; 962 case 0x07: 963 dev_warn(&device->cdev->dev, 964 "FORMAT F - Track format incorrect\n"); 965 break; 966 case 0x09: 967 dev_warn(&device->cdev->dev, 968 "FORMAT F - Caching reinitiated\n"); 969 break; 970 case 0x0A: 971 dev_warn(&device->cdev->dev, 972 "FORMAT F - Nonvolatile storage " 973 "terminated\n"); 974 break; 975 case 0x0B: 976 dev_warn(&device->cdev->dev, 977 "FORMAT F - Volume is suspended duplex\n"); 978 /* call extended error reporting (EER) */ 979 dasd_eer_write(device, erp->refers, 980 DASD_EER_PPRCSUSPEND); 981 break; 982 case 0x0C: 983 dev_warn(&device->cdev->dev, 984 "FORMAT F - Subsystem status cannot be " 985 "determined\n"); 986 break; 987 case 0x0D: 988 dev_warn(&device->cdev->dev, 989 "FORMAT F - Caching status reset to " 990 "default\n"); 991 break; 992 case 0x0E: 993 dev_warn(&device->cdev->dev, 994 "FORMAT F - DASD Fast Write inhibited\n"); 995 break; 996 default: 997 dev_warn(&device->cdev->dev, 998 "FORMAT F - Reserved\n"); 999 } 1000 break; 1001 1002 default: 1003 dev_err(&device->cdev->dev, 1004 "Unknown message format %02x", msg_format); 1005 break; 1006 } /* end switch message format */ 1007 1008} /* end dasd_3990_handle_env_data */ 1009 1010/* 1011 * DASD_3990_ERP_COM_REJ 1012 * 1013 * DESCRIPTION 1014 * Handles 24 byte 'Command Reject' error. 1015 * 1016 * PARAMETER 1017 * erp current erp_head 1018 * sense current sense data 1019 * 1020 * RETURN VALUES 1021 * erp 'new' erp_head - pointer to new ERP 1022 */ 1023static struct dasd_ccw_req * 1024dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense) 1025{ 1026 1027 struct dasd_device *device = erp->startdev; 1028 1029 erp->function = dasd_3990_erp_com_rej; 1030 1031 /* env data present (ACTION 10 - retry should work) */ 1032 if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1033 1034 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1035 "Command Reject - environmental data present"); 1036 1037 dasd_3990_handle_env_data(erp, sense); 1038 1039 erp->retries = 5; 1040 1041 } else if (sense[1] & SNS1_WRITE_INHIBITED) { 1042 dev_err(&device->cdev->dev, "An I/O request was rejected" 1043 " because writing is inhibited\n"); 1044 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1045 } else if (sense[7] == SNS7_INVALID_ON_SEC) { 1046 dev_err(&device->cdev->dev, "An I/O request was rejected on a copy pair secondary device\n"); 1047 /* suppress dump of sense data for this error */ 1048 set_bit(DASD_CQR_SUPPRESS_CR, &erp->refers->flags); 1049 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1050 } else { 1051 if (!test_bit(DASD_CQR_SUPPRESS_CR, &erp->flags)) 1052 dev_err(&device->cdev->dev, 1053 "An I/O command request was rejected\n"); 1054 1055 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1056 } 1057 1058 return erp; 1059 1060} /* end dasd_3990_erp_com_rej */ 1061 1062/* 1063 * DASD_3990_ERP_BUS_OUT 1064 * 1065 * DESCRIPTION 1066 * Handles 24 byte 'Bus Out Parity Check' error. 1067 * 1068 * PARAMETER 1069 * erp current erp_head 1070 * RETURN VALUES 1071 * erp new erp_head - pointer to new ERP 1072 */ 1073static struct dasd_ccw_req * 1074dasd_3990_erp_bus_out(struct dasd_ccw_req * erp) 1075{ 1076 1077 struct dasd_device *device = erp->startdev; 1078 1079 /* first time set initial retry counter and erp_function */ 1080 /* and retry once without blocking queue */ 1081 /* (this enables easier enqueing of the cqr) */ 1082 if (erp->function != dasd_3990_erp_bus_out) { 1083 erp->retries = 256; 1084 erp->function = dasd_3990_erp_bus_out; 1085 1086 } else { 1087 1088 /* issue a message and wait for 'device ready' interrupt */ 1089 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1090 "bus out parity error or BOPC requested by " 1091 "channel"); 1092 1093 dasd_3990_erp_block_queue(erp, 60*HZ); 1094 1095 } 1096 1097 return erp; 1098 1099} /* end dasd_3990_erp_bus_out */ 1100 1101/* 1102 * DASD_3990_ERP_EQUIP_CHECK 1103 * 1104 * DESCRIPTION 1105 * Handles 24 byte 'Equipment Check' error. 1106 * 1107 * PARAMETER 1108 * erp current erp_head 1109 * RETURN VALUES 1110 * erp new erp_head - pointer to new ERP 1111 */ 1112static struct dasd_ccw_req * 1113dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense) 1114{ 1115 1116 struct dasd_device *device = erp->startdev; 1117 1118 erp->function = dasd_3990_erp_equip_check; 1119 1120 if (sense[1] & SNS1_WRITE_INHIBITED) { 1121 dev_err(&device->cdev->dev, "Write inhibited path encountered\n"); 1122 1123 erp = dasd_3990_erp_action_1(erp); 1124 1125 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1126 1127 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1128 "Equipment Check - " "environmental data present"); 1129 1130 dasd_3990_handle_env_data(erp, sense); 1131 1132 erp = dasd_3990_erp_action_4(erp, sense); 1133 1134 } else if (sense[1] & SNS1_PERM_ERR) { 1135 1136 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1137 "Equipment Check - retry exhausted or " 1138 "undesirable"); 1139 1140 erp = dasd_3990_erp_action_1(erp); 1141 1142 } else { 1143 /* all other equipment checks - Action 5 */ 1144 /* rest is done when retries == 0 */ 1145 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1146 "Equipment check or processing error"); 1147 1148 erp = dasd_3990_erp_action_5(erp); 1149 } 1150 return erp; 1151 1152} /* end dasd_3990_erp_equip_check */ 1153 1154/* 1155 * DASD_3990_ERP_DATA_CHECK 1156 * 1157 * DESCRIPTION 1158 * Handles 24 byte 'Data Check' error. 1159 * 1160 * PARAMETER 1161 * erp current erp_head 1162 * RETURN VALUES 1163 * erp new erp_head - pointer to new ERP 1164 */ 1165static struct dasd_ccw_req * 1166dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense) 1167{ 1168 1169 struct dasd_device *device = erp->startdev; 1170 1171 erp->function = dasd_3990_erp_data_check; 1172 1173 if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */ 1174 1175 /* issue message that the data has been corrected */ 1176 dev_emerg(&device->cdev->dev, 1177 "Data recovered during retry with PCI " 1178 "fetch mode active\n"); 1179 1180 /* not possible to handle this situation in Linux */ 1181 panic("No way to inform application about the possibly " 1182 "incorrect data"); 1183 1184 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1185 1186 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1187 "Uncorrectable data check recovered secondary " 1188 "addr of duplex pair"); 1189 1190 erp = dasd_3990_erp_action_4(erp, sense); 1191 1192 } else if (sense[1] & SNS1_PERM_ERR) { 1193 1194 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1195 "Uncorrectable data check with internal " 1196 "retry exhausted"); 1197 1198 erp = dasd_3990_erp_action_1(erp); 1199 1200 } else { 1201 /* all other data checks */ 1202 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1203 "Uncorrectable data check with retry count " 1204 "exhausted..."); 1205 1206 erp = dasd_3990_erp_action_5(erp); 1207 } 1208 1209 return erp; 1210 1211} /* end dasd_3990_erp_data_check */ 1212 1213/* 1214 * DASD_3990_ERP_OVERRUN 1215 * 1216 * DESCRIPTION 1217 * Handles 24 byte 'Overrun' error. 1218 * 1219 * PARAMETER 1220 * erp current erp_head 1221 * RETURN VALUES 1222 * erp new erp_head - pointer to new ERP 1223 */ 1224static struct dasd_ccw_req * 1225dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense) 1226{ 1227 1228 struct dasd_device *device = erp->startdev; 1229 1230 erp->function = dasd_3990_erp_overrun; 1231 1232 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1233 "Overrun - service overrun or overrun" 1234 " error requested by channel"); 1235 1236 erp = dasd_3990_erp_action_5(erp); 1237 1238 return erp; 1239 1240} /* end dasd_3990_erp_overrun */ 1241 1242/* 1243 * DASD_3990_ERP_INV_FORMAT 1244 * 1245 * DESCRIPTION 1246 * Handles 24 byte 'Invalid Track Format' error. 1247 * 1248 * PARAMETER 1249 * erp current erp_head 1250 * RETURN VALUES 1251 * erp new erp_head - pointer to new ERP 1252 */ 1253static struct dasd_ccw_req * 1254dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense) 1255{ 1256 1257 struct dasd_device *device = erp->startdev; 1258 1259 erp->function = dasd_3990_erp_inv_format; 1260 1261 if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1262 1263 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1264 "Track format error when destaging or " 1265 "staging data"); 1266 1267 dasd_3990_handle_env_data(erp, sense); 1268 1269 erp = dasd_3990_erp_action_4(erp, sense); 1270 1271 } else { 1272 dev_err(&device->cdev->dev, "Track format is not valid\n"); 1273 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1274 } 1275 1276 return erp; 1277 1278} /* end dasd_3990_erp_inv_format */ 1279 1280/* 1281 * DASD_3990_ERP_EOC 1282 * 1283 * DESCRIPTION 1284 * Handles 24 byte 'End-of-Cylinder' error. 1285 * 1286 * PARAMETER 1287 * erp already added default erp 1288 * RETURN VALUES 1289 * erp pointer to original (failed) cqr. 1290 */ 1291static struct dasd_ccw_req * 1292dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense) 1293{ 1294 1295 struct dasd_device *device = default_erp->startdev; 1296 1297 dev_err(&device->cdev->dev, 1298 "The cylinder data for accessing the DASD is inconsistent\n"); 1299 1300 /* implement action 7 - BUG */ 1301 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1302 1303} /* end dasd_3990_erp_EOC */ 1304 1305/* 1306 * DASD_3990_ERP_ENV_DATA 1307 * 1308 * DESCRIPTION 1309 * Handles 24 byte 'Environmental-Data Present' error. 1310 * 1311 * PARAMETER 1312 * erp current erp_head 1313 * RETURN VALUES 1314 * erp new erp_head - pointer to new ERP 1315 */ 1316static struct dasd_ccw_req * 1317dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense) 1318{ 1319 1320 struct dasd_device *device = erp->startdev; 1321 1322 erp->function = dasd_3990_erp_env_data; 1323 1324 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Environmental data present"); 1325 1326 dasd_3990_handle_env_data(erp, sense); 1327 1328 /* don't retry on disabled interface */ 1329 if (sense[7] != 0x0F) { 1330 erp = dasd_3990_erp_action_4(erp, sense); 1331 } else { 1332 erp->status = DASD_CQR_FILLED; 1333 } 1334 1335 return erp; 1336 1337} /* end dasd_3990_erp_env_data */ 1338 1339/* 1340 * DASD_3990_ERP_NO_REC 1341 * 1342 * DESCRIPTION 1343 * Handles 24 byte 'No Record Found' error. 1344 * 1345 * PARAMETER 1346 * erp already added default ERP 1347 * 1348 * RETURN VALUES 1349 * erp new erp_head - pointer to new ERP 1350 */ 1351static struct dasd_ccw_req * 1352dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense) 1353{ 1354 1355 struct dasd_device *device = default_erp->startdev; 1356 1357 /* 1358 * In some cases the 'No Record Found' error might be expected and 1359 * log messages shouldn't be written then. 1360 * Check if the according suppress bit is set. 1361 */ 1362 if (!test_bit(DASD_CQR_SUPPRESS_NRF, &default_erp->flags)) 1363 dev_err(&device->cdev->dev, 1364 "The specified record was not found\n"); 1365 1366 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1367 1368} /* end dasd_3990_erp_no_rec */ 1369 1370/* 1371 * DASD_3990_ERP_FILE_PROT 1372 * 1373 * DESCRIPTION 1374 * Handles 24 byte 'File Protected' error. 1375 * Note: Seek related recovery is not implemented because 1376 * wee don't use the seek command yet. 1377 * 1378 * PARAMETER 1379 * erp current erp_head 1380 * RETURN VALUES 1381 * erp new erp_head - pointer to new ERP 1382 */ 1383static struct dasd_ccw_req * 1384dasd_3990_erp_file_prot(struct dasd_ccw_req * erp) 1385{ 1386 1387 struct dasd_device *device = erp->startdev; 1388 1389 dev_err(&device->cdev->dev, 1390 "Accessing the DASD failed because of a hardware error\n"); 1391 1392 return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1393 1394} /* end dasd_3990_erp_file_prot */ 1395 1396/* 1397 * DASD_3990_ERP_INSPECT_ALIAS 1398 * 1399 * DESCRIPTION 1400 * Checks if the original request was started on an alias device. 1401 * If yes, it modifies the original and the erp request so that 1402 * the erp request can be started on a base device. 1403 * 1404 * PARAMETER 1405 * erp pointer to the currently created default ERP 1406 * 1407 * RETURN VALUES 1408 * erp pointer to the modified ERP, or NULL 1409 */ 1410 1411static struct dasd_ccw_req *dasd_3990_erp_inspect_alias( 1412 struct dasd_ccw_req *erp) 1413{ 1414 struct dasd_ccw_req *cqr = erp->refers; 1415 char *sense; 1416 1417 if (cqr->block && 1418 (cqr->block->base != cqr->startdev)) { 1419 1420 sense = dasd_get_sense(&erp->refers->irb); 1421 /* 1422 * dynamic pav may have changed base alias mapping 1423 */ 1424 if (!test_bit(DASD_FLAG_OFFLINE, &cqr->startdev->flags) && sense 1425 && (sense[0] == 0x10) && (sense[7] == 0x0F) 1426 && (sense[8] == 0x67)) { 1427 /* 1428 * remove device from alias handling to prevent new 1429 * requests from being scheduled on the 1430 * wrong alias device 1431 */ 1432 dasd_alias_remove_device(cqr->startdev); 1433 1434 /* schedule worker to reload device */ 1435 dasd_reload_device(cqr->startdev); 1436 } 1437 1438 if (cqr->startdev->features & DASD_FEATURE_ERPLOG) { 1439 DBF_DEV_EVENT(DBF_ERR, cqr->startdev, 1440 "ERP on alias device for request %p," 1441 " recover on base device %s", cqr, 1442 dev_name(&cqr->block->base->cdev->dev)); 1443 } 1444 dasd_eckd_reset_ccw_to_base_io(cqr); 1445 erp->startdev = cqr->block->base; 1446 erp->function = dasd_3990_erp_inspect_alias; 1447 return erp; 1448 } else 1449 return NULL; 1450} 1451 1452 1453/* 1454 * DASD_3990_ERP_INSPECT_24 1455 * 1456 * DESCRIPTION 1457 * Does a detailed inspection of the 24 byte sense data 1458 * and sets up a related error recovery action. 1459 * 1460 * PARAMETER 1461 * sense sense data of the actual error 1462 * erp pointer to the currently created default ERP 1463 * 1464 * RETURN VALUES 1465 * erp pointer to the (addtitional) ERP 1466 */ 1467static struct dasd_ccw_req * 1468dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense) 1469{ 1470 1471 struct dasd_ccw_req *erp_filled = NULL; 1472 1473 /* Check sense for .... */ 1474 /* 'Command Reject' */ 1475 if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) { 1476 erp_filled = dasd_3990_erp_com_rej(erp, sense); 1477 } 1478 /* 'Intervention Required' */ 1479 if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) { 1480 erp_filled = dasd_3990_erp_int_req(erp); 1481 } 1482 /* 'Bus Out Parity Check' */ 1483 if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) { 1484 erp_filled = dasd_3990_erp_bus_out(erp); 1485 } 1486 /* 'Equipment Check' */ 1487 if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) { 1488 erp_filled = dasd_3990_erp_equip_check(erp, sense); 1489 } 1490 /* 'Data Check' */ 1491 if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) { 1492 erp_filled = dasd_3990_erp_data_check(erp, sense); 1493 } 1494 /* 'Overrun' */ 1495 if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) { 1496 erp_filled = dasd_3990_erp_overrun(erp, sense); 1497 } 1498 /* 'Invalid Track Format' */ 1499 if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) { 1500 erp_filled = dasd_3990_erp_inv_format(erp, sense); 1501 } 1502 /* 'End-of-Cylinder' */ 1503 if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) { 1504 erp_filled = dasd_3990_erp_EOC(erp, sense); 1505 } 1506 /* 'Environmental Data' */ 1507 if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) { 1508 erp_filled = dasd_3990_erp_env_data(erp, sense); 1509 } 1510 /* 'No Record Found' */ 1511 if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) { 1512 erp_filled = dasd_3990_erp_no_rec(erp, sense); 1513 } 1514 /* 'File Protected' */ 1515 if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) { 1516 erp_filled = dasd_3990_erp_file_prot(erp); 1517 } 1518 /* other (unknown) error - do default ERP */ 1519 if (erp_filled == NULL) { 1520 1521 erp_filled = erp; 1522 } 1523 1524 return erp_filled; 1525 1526} /* END dasd_3990_erp_inspect_24 */ 1527 1528/* 1529 ***************************************************************************** 1530 * 32 byte sense ERP functions (only) 1531 ***************************************************************************** 1532 */ 1533 1534/* 1535 * DASD_3990_ERPACTION_10_32 1536 * 1537 * DESCRIPTION 1538 * Handles 32 byte 'Action 10' of Single Program Action Codes. 1539 * Just retry and if retry doesn't work, return with error. 1540 * 1541 * PARAMETER 1542 * erp current erp_head 1543 * sense current sense data 1544 * RETURN VALUES 1545 * erp modified erp_head 1546 */ 1547static struct dasd_ccw_req * 1548dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense) 1549{ 1550 1551 struct dasd_device *device = erp->startdev; 1552 1553 erp->retries = 256; 1554 erp->function = dasd_3990_erp_action_10_32; 1555 1556 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Perform logging requested"); 1557 1558 return erp; 1559 1560} /* end dasd_3990_erp_action_10_32 */ 1561 1562/* 1563 * DASD_3990_ERP_ACTION_1B_32 1564 * 1565 * DESCRIPTION 1566 * Handles 32 byte 'Action 1B' of Single Program Action Codes. 1567 * A write operation could not be finished because of an unexpected 1568 * condition. 1569 * The already created 'default erp' is used to get the link to 1570 * the erp chain, but it can not be used for this recovery 1571 * action because it contains no DE/LO data space. 1572 * 1573 * PARAMETER 1574 * default_erp already added default erp. 1575 * sense current sense data 1576 * 1577 * RETURN VALUES 1578 * erp new erp or 1579 * default_erp in case of imprecise ending or error 1580 */ 1581static struct dasd_ccw_req * 1582dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) 1583{ 1584 1585 struct dasd_device *device = default_erp->startdev; 1586 dma32_t cpa = 0; 1587 struct dasd_ccw_req *cqr; 1588 struct dasd_ccw_req *erp; 1589 struct DE_eckd_data *DE_data; 1590 struct PFX_eckd_data *PFX_data; 1591 char *LO_data; /* LO_eckd_data_t */ 1592 struct ccw1 *ccw, *oldccw; 1593 1594 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1595 "Write not finished because of unexpected condition"); 1596 1597 default_erp->function = dasd_3990_erp_action_1B_32; 1598 1599 /* determine the original cqr */ 1600 cqr = default_erp; 1601 1602 while (cqr->refers != NULL) { 1603 cqr = cqr->refers; 1604 } 1605 1606 if (scsw_is_tm(&cqr->irb.scsw)) { 1607 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1608 "32 bit sense, action 1B is not defined" 1609 " in transport mode - just retry"); 1610 return default_erp; 1611 } 1612 1613 /* for imprecise ending just do default erp */ 1614 if (sense[1] & 0x01) { 1615 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1616 "Imprecise ending is set - just retry"); 1617 1618 return default_erp; 1619 } 1620 1621 /* determine the address of the CCW to be restarted */ 1622 /* Imprecise ending is not set -> addr from IRB-SCSW */ 1623 cpa = default_erp->refers->irb.scsw.cmd.cpa; 1624 1625 if (cpa == 0) { 1626 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1627 "Unable to determine address of the CCW " 1628 "to be restarted"); 1629 1630 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1631 } 1632 1633 /* Build new ERP request including DE/LO */ 1634 erp = dasd_alloc_erp_request(cqr->magic, 1635 2 + 1,/* DE/LO + TIC */ 1636 sizeof(struct DE_eckd_data) + 1637 sizeof(struct LO_eckd_data), device); 1638 1639 if (IS_ERR(erp)) { 1640 DBF_DEV_EVENT(DBF_ERR, device, "%s", 1641 "Unable to allocate ERP request (1B 32)"); 1642 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1643 } 1644 1645 /* use original DE */ 1646 DE_data = erp->data; 1647 oldccw = cqr->cpaddr; 1648 if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) { 1649 PFX_data = cqr->data; 1650 memcpy(DE_data, &PFX_data->define_extent, 1651 sizeof(struct DE_eckd_data)); 1652 } else 1653 memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data)); 1654 1655 /* create LO */ 1656 LO_data = erp->data + sizeof(struct DE_eckd_data); 1657 1658 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { 1659 /* should not */ 1660 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1661 } 1662 1663 if ((sense[7] & 0x3F) == 0x01) { 1664 /* operation code is WRITE DATA -> data area orientation */ 1665 LO_data[0] = 0x81; 1666 1667 } else if ((sense[7] & 0x3F) == 0x03) { 1668 /* operation code is FORMAT WRITE -> index orientation */ 1669 LO_data[0] = 0xC3; 1670 1671 } else { 1672 LO_data[0] = sense[7]; /* operation */ 1673 } 1674 1675 LO_data[1] = sense[8]; /* auxiliary */ 1676 LO_data[2] = sense[9]; 1677 LO_data[3] = sense[3]; /* count */ 1678 LO_data[4] = sense[29]; /* seek_addr.cyl */ 1679 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */ 1680 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */ 1681 1682 memcpy(&(LO_data[8]), &(sense[11]), 8); 1683 1684 /* create DE ccw */ 1685 ccw = erp->cpaddr; 1686 memset(ccw, 0, sizeof(struct ccw1)); 1687 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 1688 ccw->flags = CCW_FLAG_CC; 1689 ccw->count = 16; 1690 ccw->cda = virt_to_dma32(DE_data); 1691 1692 /* create LO ccw */ 1693 ccw++; 1694 memset(ccw, 0, sizeof(struct ccw1)); 1695 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 1696 ccw->flags = CCW_FLAG_CC; 1697 ccw->count = 16; 1698 ccw->cda = virt_to_dma32(LO_data); 1699 1700 /* TIC to the failed ccw */ 1701 ccw++; 1702 ccw->cmd_code = CCW_CMD_TIC; 1703 ccw->cda = cpa; 1704 1705 /* fill erp related fields */ 1706 erp->flags = default_erp->flags; 1707 erp->function = dasd_3990_erp_action_1B_32; 1708 erp->refers = default_erp->refers; 1709 erp->startdev = device; 1710 erp->memdev = device; 1711 erp->magic = default_erp->magic; 1712 erp->expires = default_erp->expires; 1713 erp->retries = 256; 1714 erp->buildclk = get_tod_clock(); 1715 erp->status = DASD_CQR_FILLED; 1716 1717 /* remove the default erp */ 1718 dasd_free_erp_request(default_erp, device); 1719 1720 return erp; 1721 1722} /* end dasd_3990_erp_action_1B_32 */ 1723 1724/* 1725 * DASD_3990_UPDATE_1B 1726 * 1727 * DESCRIPTION 1728 * Handles the update to the 32 byte 'Action 1B' of Single Program 1729 * Action Codes in case the first action was not successful. 1730 * The already created 'previous_erp' is the currently not successful 1731 * ERP. 1732 * 1733 * PARAMETER 1734 * previous_erp already created previous erp. 1735 * sense current sense data 1736 * RETURN VALUES 1737 * erp modified erp 1738 */ 1739static struct dasd_ccw_req * 1740dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense) 1741{ 1742 1743 struct dasd_device *device = previous_erp->startdev; 1744 dma32_t cpa = 0; 1745 struct dasd_ccw_req *cqr; 1746 struct dasd_ccw_req *erp; 1747 char *LO_data; /* struct LO_eckd_data */ 1748 struct ccw1 *ccw; 1749 1750 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1751 "Write not finished because of unexpected condition" 1752 " - follow on"); 1753 1754 /* determine the original cqr */ 1755 cqr = previous_erp; 1756 1757 while (cqr->refers != NULL) { 1758 cqr = cqr->refers; 1759 } 1760 1761 if (scsw_is_tm(&cqr->irb.scsw)) { 1762 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1763 "32 bit sense, action 1B, update," 1764 " in transport mode - just retry"); 1765 return previous_erp; 1766 } 1767 1768 /* for imprecise ending just do default erp */ 1769 if (sense[1] & 0x01) { 1770 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1771 "Imprecise ending is set - just retry"); 1772 1773 previous_erp->status = DASD_CQR_FILLED; 1774 1775 return previous_erp; 1776 } 1777 1778 /* determine the address of the CCW to be restarted */ 1779 /* Imprecise ending is not set -> addr from IRB-SCSW */ 1780 cpa = previous_erp->irb.scsw.cmd.cpa; 1781 1782 if (cpa == 0) { 1783 dev_err(&device->cdev->dev, 1784 "Unable to determine address of to be restarted CCW\n"); 1785 1786 previous_erp->status = DASD_CQR_FAILED; 1787 1788 return previous_erp; 1789 } 1790 1791 erp = previous_erp; 1792 1793 /* update the LO with the new returned sense data */ 1794 LO_data = erp->data + sizeof(struct DE_eckd_data); 1795 1796 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { 1797 /* should not happen */ 1798 previous_erp->status = DASD_CQR_FAILED; 1799 1800 return previous_erp; 1801 } 1802 1803 if ((sense[7] & 0x3F) == 0x01) { 1804 /* operation code is WRITE DATA -> data area orientation */ 1805 LO_data[0] = 0x81; 1806 1807 } else if ((sense[7] & 0x3F) == 0x03) { 1808 /* operation code is FORMAT WRITE -> index orientation */ 1809 LO_data[0] = 0xC3; 1810 1811 } else { 1812 LO_data[0] = sense[7]; /* operation */ 1813 } 1814 1815 LO_data[1] = sense[8]; /* auxiliary */ 1816 LO_data[2] = sense[9]; 1817 LO_data[3] = sense[3]; /* count */ 1818 LO_data[4] = sense[29]; /* seek_addr.cyl */ 1819 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */ 1820 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */ 1821 1822 memcpy(&(LO_data[8]), &(sense[11]), 8); 1823 1824 /* TIC to the failed ccw */ 1825 ccw = erp->cpaddr; /* addr of DE ccw */ 1826 ccw++; /* addr of LE ccw */ 1827 ccw++; /* addr of TIC ccw */ 1828 ccw->cda = cpa; 1829 1830 erp->status = DASD_CQR_FILLED; 1831 1832 return erp; 1833 1834} /* end dasd_3990_update_1B */ 1835 1836/* 1837 * DASD_3990_ERP_COMPOUND_RETRY 1838 * 1839 * DESCRIPTION 1840 * Handles the compound ERP action retry code. 1841 * NOTE: At least one retry is done even if zero is specified 1842 * by the sense data. This makes enqueueing of the request 1843 * easier. 1844 * 1845 * PARAMETER 1846 * sense sense data of the actual error 1847 * erp pointer to the currently created ERP 1848 * 1849 * RETURN VALUES 1850 * erp modified ERP pointer 1851 * 1852 */ 1853static void 1854dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense) 1855{ 1856 1857 switch (sense[25] & 0x03) { 1858 case 0x00: /* no not retry */ 1859 erp->retries = 1; 1860 break; 1861 1862 case 0x01: /* retry 2 times */ 1863 erp->retries = 2; 1864 break; 1865 1866 case 0x02: /* retry 10 times */ 1867 erp->retries = 10; 1868 break; 1869 1870 case 0x03: /* retry 256 times */ 1871 erp->retries = 256; 1872 break; 1873 1874 default: 1875 BUG(); 1876 } 1877 1878 erp->function = dasd_3990_erp_compound_retry; 1879 1880} /* end dasd_3990_erp_compound_retry */ 1881 1882/* 1883 * DASD_3990_ERP_COMPOUND_PATH 1884 * 1885 * DESCRIPTION 1886 * Handles the compound ERP action for retry on alternate 1887 * channel path. 1888 * 1889 * PARAMETER 1890 * sense sense data of the actual error 1891 * erp pointer to the currently created ERP 1892 * 1893 * RETURN VALUES 1894 * erp modified ERP pointer 1895 * 1896 */ 1897static void 1898dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense) 1899{ 1900 if (sense[25] & DASD_SENSE_BIT_3) { 1901 dasd_3990_erp_alternate_path(erp); 1902 1903 if (erp->status == DASD_CQR_FAILED && 1904 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) { 1905 /* reset the lpm and the status to be able to 1906 * try further actions. */ 1907 erp->lpm = dasd_path_get_opm(erp->startdev); 1908 erp->status = DASD_CQR_NEED_ERP; 1909 } 1910 } 1911 1912 erp->function = dasd_3990_erp_compound_path; 1913 1914} /* end dasd_3990_erp_compound_path */ 1915 1916/* 1917 * DASD_3990_ERP_COMPOUND_CODE 1918 * 1919 * DESCRIPTION 1920 * Handles the compound ERP action for retry code. 1921 * 1922 * PARAMETER 1923 * sense sense data of the actual error 1924 * erp pointer to the currently created ERP 1925 * 1926 * RETURN VALUES 1927 * erp NEW ERP pointer 1928 * 1929 */ 1930static struct dasd_ccw_req * 1931dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense) 1932{ 1933 1934 if (sense[25] & DASD_SENSE_BIT_2) { 1935 1936 switch (sense[28]) { 1937 case 0x17: 1938 /* issue a Diagnostic Control command with an 1939 * Inhibit Write subcommand and controller modifier */ 1940 erp = dasd_3990_erp_DCTL(erp, 0x20); 1941 break; 1942 1943 case 0x25: 1944 /* wait for 5 seconds and retry again */ 1945 erp->retries = 1; 1946 1947 dasd_3990_erp_block_queue (erp, 5*HZ); 1948 break; 1949 1950 default: 1951 /* should not happen - continue */ 1952 break; 1953 } 1954 } 1955 1956 erp->function = dasd_3990_erp_compound_code; 1957 1958 return erp; 1959 1960} /* end dasd_3990_erp_compound_code */ 1961 1962/* 1963 * DASD_3990_ERP_COMPOUND_CONFIG 1964 * 1965 * DESCRIPTION 1966 * Handles the compound ERP action for configuration 1967 * dependent error. 1968 * Note: duplex handling is not implemented (yet). 1969 * 1970 * PARAMETER 1971 * sense sense data of the actual error 1972 * erp pointer to the currently created ERP 1973 * 1974 * RETURN VALUES 1975 * erp modified ERP pointer 1976 * 1977 */ 1978static void 1979dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense) 1980{ 1981 1982 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) { 1983 struct dasd_device *device = erp->startdev; 1984 dev_err(&device->cdev->dev, 1985 "Compound configuration error occurred\n"); 1986 } 1987 1988 erp->function = dasd_3990_erp_compound_config; 1989 1990} /* end dasd_3990_erp_compound_config */ 1991 1992/* 1993 * DASD_3990_ERP_COMPOUND 1994 * 1995 * DESCRIPTION 1996 * Does the further compound program action if 1997 * compound retry was not successful. 1998 * 1999 * PARAMETER 2000 * sense sense data of the actual error 2001 * erp pointer to the current (failed) ERP 2002 * 2003 * RETURN VALUES 2004 * erp (additional) ERP pointer 2005 * 2006 */ 2007static struct dasd_ccw_req * 2008dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense) 2009{ 2010 2011 if ((erp->function == dasd_3990_erp_compound_retry) && 2012 (erp->status == DASD_CQR_NEED_ERP)) { 2013 2014 dasd_3990_erp_compound_path(erp, sense); 2015 } 2016 2017 if ((erp->function == dasd_3990_erp_compound_path) && 2018 (erp->status == DASD_CQR_NEED_ERP)) { 2019 2020 erp = dasd_3990_erp_compound_code(erp, sense); 2021 } 2022 2023 if ((erp->function == dasd_3990_erp_compound_code) && 2024 (erp->status == DASD_CQR_NEED_ERP)) { 2025 2026 dasd_3990_erp_compound_config(erp, sense); 2027 } 2028 2029 /* if no compound action ERP specified, the request failed */ 2030 if (erp->status == DASD_CQR_NEED_ERP) 2031 erp->status = DASD_CQR_FAILED; 2032 2033 return erp; 2034 2035} /* end dasd_3990_erp_compound */ 2036 2037/* 2038 *DASD_3990_ERP_HANDLE_SIM 2039 * 2040 *DESCRIPTION 2041 * inspects the SIM SENSE data and starts an appropriate action 2042 * 2043 * PARAMETER 2044 * sense sense data of the actual error 2045 * 2046 * RETURN VALUES 2047 * none 2048 */ 2049void 2050dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense) 2051{ 2052 /* print message according to log or message to operator mode */ 2053 if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) { 2054 /* print SIM SRC from RefCode */ 2055 dev_err(&device->cdev->dev, "SIM - SRC: " 2056 "%02x%02x%02x%02x\n", sense[22], 2057 sense[23], sense[11], sense[12]); 2058 } else if (sense[24] & DASD_SIM_LOG) { 2059 /* print SIM SRC Refcode */ 2060 dev_warn(&device->cdev->dev, "log SIM - SRC: " 2061 "%02x%02x%02x%02x\n", sense[22], 2062 sense[23], sense[11], sense[12]); 2063 } 2064} 2065 2066/* 2067 * DASD_3990_ERP_INSPECT_32 2068 * 2069 * DESCRIPTION 2070 * Does a detailed inspection of the 32 byte sense data 2071 * and sets up a related error recovery action. 2072 * 2073 * PARAMETER 2074 * sense sense data of the actual error 2075 * erp pointer to the currently created default ERP 2076 * 2077 * RETURN VALUES 2078 * erp_filled pointer to the ERP 2079 * 2080 */ 2081static struct dasd_ccw_req * 2082dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense) 2083{ 2084 2085 struct dasd_device *device = erp->startdev; 2086 2087 erp->function = dasd_3990_erp_inspect_32; 2088 2089 /* check for SIM sense data */ 2090 if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE) 2091 dasd_3990_erp_handle_sim(device, sense); 2092 2093 if (sense[25] & DASD_SENSE_BIT_0) { 2094 2095 /* compound program action codes (byte25 bit 0 == '1') */ 2096 dasd_3990_erp_compound_retry(erp, sense); 2097 2098 } else { 2099 2100 /* single program action codes (byte25 bit 0 == '0') */ 2101 switch (sense[25]) { 2102 2103 case 0x00: /* success - use default ERP for retries */ 2104 DBF_DEV_EVENT(DBF_DEBUG, device, "%s", 2105 "ERP called for successful request" 2106 " - just retry"); 2107 break; 2108 2109 case 0x01: /* fatal error */ 2110 dev_err(&device->cdev->dev, 2111 "ERP failed for the DASD\n"); 2112 2113 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2114 break; 2115 2116 case 0x02: /* intervention required */ 2117 case 0x03: /* intervention required during dual copy */ 2118 erp = dasd_3990_erp_int_req(erp); 2119 break; 2120 2121 case 0x0F: 2122 dev_err(&device->cdev->dev, 2123 "Update write command error occurred\n"); 2124 2125 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2126 break; 2127 2128 case 0x10: /* logging required for other channel program */ 2129 erp = dasd_3990_erp_action_10_32(erp, sense); 2130 break; 2131 2132 case 0x15: 2133 dev_err(&device->cdev->dev, 2134 "Track outside defined extent error occurred\n"); 2135 2136 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2137 break; 2138 2139 case 0x1B: /* unexpected condition during write */ 2140 2141 erp = dasd_3990_erp_action_1B_32(erp, sense); 2142 break; 2143 2144 case 0x1C: /* invalid data */ 2145 dev_emerg(&device->cdev->dev, 2146 "Data recovered during retry with PCI " 2147 "fetch mode active\n"); 2148 2149 /* not possible to handle this situation in Linux */ 2150 panic 2151 ("Invalid data - No way to inform application " 2152 "about the possibly incorrect data"); 2153 break; 2154 2155 case 0x1D: /* state-change pending */ 2156 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2157 "A State change pending condition exists " 2158 "for the subsystem or device"); 2159 2160 erp = dasd_3990_erp_action_4(erp, sense); 2161 break; 2162 2163 case 0x1E: /* busy */ 2164 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2165 "Busy condition exists " 2166 "for the subsystem or device"); 2167 erp = dasd_3990_erp_action_4(erp, sense); 2168 break; 2169 2170 default: /* all others errors - default erp */ 2171 break; 2172 } 2173 } 2174 2175 return erp; 2176 2177} /* end dasd_3990_erp_inspect_32 */ 2178 2179static void dasd_3990_erp_disable_path(struct dasd_device *device, __u8 lpum) 2180{ 2181 int pos = pathmask_to_pos(lpum); 2182 2183 if (!(device->features & DASD_FEATURE_PATH_AUTODISABLE)) { 2184 dev_err(&device->cdev->dev, 2185 "Path %x.%02x (pathmask %02x) is operational despite excessive IFCCs\n", 2186 device->path[pos].cssid, device->path[pos].chpid, lpum); 2187 goto out; 2188 } 2189 2190 /* no remaining path, cannot disable */ 2191 if (!(dasd_path_get_opm(device) & ~lpum)) { 2192 dev_err(&device->cdev->dev, 2193 "Last path %x.%02x (pathmask %02x) is operational despite excessive IFCCs\n", 2194 device->path[pos].cssid, device->path[pos].chpid, lpum); 2195 goto out; 2196 } 2197 2198 dev_err(&device->cdev->dev, 2199 "Path %x.%02x (pathmask %02x) is disabled - IFCC threshold exceeded\n", 2200 device->path[pos].cssid, device->path[pos].chpid, lpum); 2201 dasd_path_remove_opm(device, lpum); 2202 dasd_path_add_ifccpm(device, lpum); 2203 2204out: 2205 device->path[pos].errorclk = 0; 2206 atomic_set(&device->path[pos].error_count, 0); 2207} 2208 2209static void dasd_3990_erp_account_error(struct dasd_ccw_req *erp) 2210{ 2211 struct dasd_device *device = erp->startdev; 2212 __u8 lpum = erp->refers->irb.esw.esw1.lpum; 2213 int pos = pathmask_to_pos(lpum); 2214 unsigned long clk; 2215 2216 if (!device->path_thrhld) 2217 return; 2218 2219 clk = get_tod_clock(); 2220 /* 2221 * check if the last error is longer ago than the timeout, 2222 * if so reset error state 2223 */ 2224 if ((tod_to_ns(clk - device->path[pos].errorclk) / NSEC_PER_SEC) 2225 >= device->path_interval) { 2226 atomic_set(&device->path[pos].error_count, 0); 2227 device->path[pos].errorclk = 0; 2228 } 2229 atomic_inc(&device->path[pos].error_count); 2230 device->path[pos].errorclk = clk; 2231 /* threshold exceeded disable path if possible */ 2232 if (atomic_read(&device->path[pos].error_count) >= 2233 device->path_thrhld) 2234 dasd_3990_erp_disable_path(device, lpum); 2235} 2236 2237/* 2238 ***************************************************************************** 2239 * main ERP control functions (24 and 32 byte sense) 2240 ***************************************************************************** 2241 */ 2242 2243/* 2244 * DASD_3990_ERP_CONTROL_CHECK 2245 * 2246 * DESCRIPTION 2247 * Does a generic inspection if a control check occurred and sets up 2248 * the related error recovery procedure 2249 * 2250 * PARAMETER 2251 * erp pointer to the currently created default ERP 2252 * 2253 * RETURN VALUES 2254 * erp_filled pointer to the erp 2255 */ 2256 2257static struct dasd_ccw_req * 2258dasd_3990_erp_control_check(struct dasd_ccw_req *erp) 2259{ 2260 struct dasd_device *device = erp->startdev; 2261 2262 if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK 2263 | SCHN_STAT_CHN_CTRL_CHK)) { 2264 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2265 "channel or interface control check"); 2266 dasd_3990_erp_account_error(erp); 2267 erp = dasd_3990_erp_action_4(erp, NULL); 2268 } 2269 return erp; 2270} 2271 2272/* 2273 * DASD_3990_ERP_INSPECT 2274 * 2275 * DESCRIPTION 2276 * Does a detailed inspection for sense data by calling either 2277 * the 24-byte or the 32-byte inspection routine. 2278 * 2279 * PARAMETER 2280 * erp pointer to the currently created default ERP 2281 * RETURN VALUES 2282 * erp_new contens was possibly modified 2283 */ 2284static struct dasd_ccw_req * 2285dasd_3990_erp_inspect(struct dasd_ccw_req *erp) 2286{ 2287 2288 struct dasd_ccw_req *erp_new = NULL; 2289 char *sense; 2290 2291 /* if this problem occurred on an alias retry on base */ 2292 erp_new = dasd_3990_erp_inspect_alias(erp); 2293 if (erp_new) 2294 return erp_new; 2295 2296 /* sense data are located in the refers record of the 2297 * already set up new ERP ! 2298 * check if concurrent sens is available 2299 */ 2300 sense = dasd_get_sense(&erp->refers->irb); 2301 if (!sense) 2302 erp_new = dasd_3990_erp_control_check(erp); 2303 /* distinguish between 24 and 32 byte sense data */ 2304 else if (sense[27] & DASD_SENSE_BIT_0) { 2305 2306 /* inspect the 24 byte sense data */ 2307 erp_new = dasd_3990_erp_inspect_24(erp, sense); 2308 2309 } else { 2310 2311 /* inspect the 32 byte sense data */ 2312 erp_new = dasd_3990_erp_inspect_32(erp, sense); 2313 2314 } /* end distinguish between 24 and 32 byte sense data */ 2315 2316 return erp_new; 2317} 2318 2319/* 2320 * DASD_3990_ERP_ADD_ERP 2321 * 2322 * DESCRIPTION 2323 * This function adds an additional request block (ERP) to the head of 2324 * the given cqr (or erp). 2325 * For a command mode cqr the erp is initialized as an default erp 2326 * (retry TIC). 2327 * For transport mode we make a copy of the original TCW (points to 2328 * the original TCCB, TIDALs, etc.) but give it a fresh 2329 * TSB so the original sense data will not be changed. 2330 * 2331 * PARAMETER 2332 * cqr head of the current ERP-chain (or single cqr if 2333 * first error) 2334 * RETURN VALUES 2335 * erp pointer to new ERP-chain head 2336 */ 2337static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr) 2338{ 2339 2340 struct dasd_device *device = cqr->startdev; 2341 struct ccw1 *ccw; 2342 struct dasd_ccw_req *erp; 2343 int cplength, datasize; 2344 struct tcw *tcw; 2345 struct tsb *tsb; 2346 2347 if (cqr->cpmode == 1) { 2348 cplength = 0; 2349 /* TCW needs to be 64 byte aligned, so leave enough room */ 2350 datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb); 2351 } else { 2352 cplength = 2; 2353 datasize = 0; 2354 } 2355 2356 /* allocate additional request block */ 2357 erp = dasd_alloc_erp_request(cqr->magic, 2358 cplength, datasize, device); 2359 if (IS_ERR(erp)) { 2360 if (cqr->retries <= 0) { 2361 DBF_DEV_EVENT(DBF_ERR, device, "%s", 2362 "Unable to allocate ERP request"); 2363 cqr->status = DASD_CQR_FAILED; 2364 cqr->stopclk = get_tod_clock(); 2365 } else { 2366 DBF_DEV_EVENT(DBF_ERR, device, 2367 "Unable to allocate ERP request " 2368 "(%i retries left)", 2369 cqr->retries); 2370 dasd_block_set_timer(device->block, (HZ << 3)); 2371 } 2372 return erp; 2373 } 2374 2375 ccw = cqr->cpaddr; 2376 if (cqr->cpmode == 1) { 2377 /* make a shallow copy of the original tcw but set new tsb */ 2378 erp->cpmode = 1; 2379 erp->cpaddr = PTR_ALIGN(erp->data, 64); 2380 tcw = erp->cpaddr; 2381 tsb = (struct tsb *) &tcw[1]; 2382 *tcw = *((struct tcw *)cqr->cpaddr); 2383 tcw->tsb = virt_to_dma64(tsb); 2384 } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) { 2385 /* PSF cannot be chained from NOOP/TIC */ 2386 erp->cpaddr = cqr->cpaddr; 2387 } else { 2388 /* initialize request with default TIC to current ERP/CQR */ 2389 ccw = erp->cpaddr; 2390 ccw->cmd_code = CCW_CMD_NOOP; 2391 ccw->flags = CCW_FLAG_CC; 2392 ccw++; 2393 ccw->cmd_code = CCW_CMD_TIC; 2394 ccw->cda = virt_to_dma32(cqr->cpaddr); 2395 } 2396 2397 erp->flags = cqr->flags; 2398 erp->function = dasd_3990_erp_add_erp; 2399 erp->refers = cqr; 2400 erp->startdev = device; 2401 erp->memdev = device; 2402 erp->block = cqr->block; 2403 erp->magic = cqr->magic; 2404 erp->expires = cqr->expires; 2405 erp->retries = device->default_retries; 2406 erp->buildclk = get_tod_clock(); 2407 erp->status = DASD_CQR_FILLED; 2408 2409 return erp; 2410} 2411 2412/* 2413 * DASD_3990_ERP_ADDITIONAL_ERP 2414 * 2415 * DESCRIPTION 2416 * An additional ERP is needed to handle the current error. 2417 * Add ERP to the head of the ERP-chain containing the ERP processing 2418 * determined based on the sense data. 2419 * 2420 * PARAMETER 2421 * cqr head of the current ERP-chain (or single cqr if 2422 * first error) 2423 * 2424 * RETURN VALUES 2425 * erp pointer to new ERP-chain head 2426 */ 2427static struct dasd_ccw_req * 2428dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr) 2429{ 2430 2431 struct dasd_ccw_req *erp = NULL; 2432 2433 /* add erp and initialize with default TIC */ 2434 erp = dasd_3990_erp_add_erp(cqr); 2435 2436 if (IS_ERR(erp)) 2437 return erp; 2438 2439 /* inspect sense, determine specific ERP if possible */ 2440 if (erp != cqr) { 2441 2442 erp = dasd_3990_erp_inspect(erp); 2443 } 2444 2445 return erp; 2446 2447} /* end dasd_3990_erp_additional_erp */ 2448 2449/* 2450 * DASD_3990_ERP_ERROR_MATCH 2451 * 2452 * DESCRIPTION 2453 * Check if the device status of the given cqr is the same. 2454 * This means that the failed CCW and the relevant sense data 2455 * must match. 2456 * I don't distinguish between 24 and 32 byte sense because in case of 2457 * 24 byte sense byte 25 and 27 is set as well. 2458 * 2459 * PARAMETER 2460 * cqr1 first cqr, which will be compared with the 2461 * cqr2 second cqr. 2462 * 2463 * RETURN VALUES 2464 * match 'boolean' for match found 2465 * returns 1 if match found, otherwise 0. 2466 */ 2467static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, 2468 struct dasd_ccw_req *cqr2) 2469{ 2470 char *sense1, *sense2; 2471 2472 if (cqr1->startdev != cqr2->startdev) 2473 return 0; 2474 2475 sense1 = dasd_get_sense(&cqr1->irb); 2476 sense2 = dasd_get_sense(&cqr2->irb); 2477 2478 /* one request has sense data, the other not -> no match, return 0 */ 2479 if (!sense1 != !sense2) 2480 return 0; 2481 /* no sense data in both cases -> check cstat for IFCC */ 2482 if (!sense1 && !sense2) { 2483 if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | 2484 SCHN_STAT_CHN_CTRL_CHK)) == 2485 (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | 2486 SCHN_STAT_CHN_CTRL_CHK))) 2487 return 1; /* match with ifcc*/ 2488 } 2489 /* check sense data; byte 0-2,25,27 */ 2490 if (!(sense1 && sense2 && 2491 (memcmp(sense1, sense2, 3) == 0) && 2492 (sense1[27] == sense2[27]) && 2493 (sense1[25] == sense2[25]))) { 2494 2495 return 0; /* sense doesn't match */ 2496 } 2497 2498 return 1; /* match */ 2499 2500} /* end dasd_3990_erp_error_match */ 2501 2502/* 2503 * DASD_3990_ERP_IN_ERP 2504 * 2505 * DESCRIPTION 2506 * check if the current error already happened before. 2507 * quick exit if current cqr is not an ERP (cqr->refers=NULL) 2508 * 2509 * PARAMETER 2510 * cqr failed cqr (either original cqr or already an erp) 2511 * 2512 * RETURN VALUES 2513 * erp erp-pointer to the already defined error 2514 * recovery procedure OR 2515 * NULL if a 'new' error occurred. 2516 */ 2517static struct dasd_ccw_req * 2518dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr) 2519{ 2520 2521 struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */ 2522 *erp_match = NULL; /* save erp chain head */ 2523 int match = 0; /* 'boolean' for matching error found */ 2524 2525 if (cqr->refers == NULL) { /* return if not in erp */ 2526 return NULL; 2527 } 2528 2529 /* check the erp/cqr chain for current error */ 2530 do { 2531 match = dasd_3990_erp_error_match(erp_head, cqr->refers); 2532 erp_match = cqr; /* save possible matching erp */ 2533 cqr = cqr->refers; /* check next erp/cqr in queue */ 2534 2535 } while ((cqr->refers != NULL) && (!match)); 2536 2537 if (!match) { 2538 return NULL; /* no match was found */ 2539 } 2540 2541 return erp_match; /* return address of matching erp */ 2542 2543} /* END dasd_3990_erp_in_erp */ 2544 2545/* 2546 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense) 2547 * 2548 * DESCRIPTION 2549 * No retry is left for the current ERP. Check what has to be done 2550 * with the ERP. 2551 * - do further defined ERP action or 2552 * - wait for interrupt or 2553 * - exit with permanent error 2554 * 2555 * PARAMETER 2556 * erp ERP which is in progress with no retry left 2557 * 2558 * RETURN VALUES 2559 * erp modified/additional ERP 2560 */ 2561static struct dasd_ccw_req * 2562dasd_3990_erp_further_erp(struct dasd_ccw_req *erp) 2563{ 2564 2565 struct dasd_device *device = erp->startdev; 2566 char *sense = dasd_get_sense(&erp->irb); 2567 2568 /* check for 24 byte sense ERP */ 2569 if ((erp->function == dasd_3990_erp_bus_out) || 2570 (erp->function == dasd_3990_erp_action_1) || 2571 (erp->function == dasd_3990_erp_action_4)) { 2572 2573 erp = dasd_3990_erp_action_1(erp); 2574 2575 } else if (erp->function == dasd_3990_erp_action_1_sec) { 2576 erp = dasd_3990_erp_action_1_sec(erp); 2577 } else if (erp->function == dasd_3990_erp_action_5) { 2578 2579 /* retries have not been successful */ 2580 /* prepare erp for retry on different channel path */ 2581 erp = dasd_3990_erp_action_1(erp); 2582 2583 if (sense && !(sense[2] & DASD_SENSE_BIT_0)) { 2584 2585 /* issue a Diagnostic Control command with an 2586 * Inhibit Write subcommand */ 2587 2588 switch (sense[25]) { 2589 case 0x17: 2590 case 0x57:{ /* controller */ 2591 erp = dasd_3990_erp_DCTL(erp, 0x20); 2592 break; 2593 } 2594 case 0x18: 2595 case 0x58:{ /* channel path */ 2596 erp = dasd_3990_erp_DCTL(erp, 0x40); 2597 break; 2598 } 2599 case 0x19: 2600 case 0x59:{ /* storage director */ 2601 erp = dasd_3990_erp_DCTL(erp, 0x80); 2602 break; 2603 } 2604 default: 2605 DBF_DEV_EVENT(DBF_WARNING, device, 2606 "invalid subcommand modifier 0x%x " 2607 "for Diagnostic Control Command", 2608 sense[25]); 2609 } 2610 } 2611 2612 /* check for 32 byte sense ERP */ 2613 } else if (sense && 2614 ((erp->function == dasd_3990_erp_compound_retry) || 2615 (erp->function == dasd_3990_erp_compound_path) || 2616 (erp->function == dasd_3990_erp_compound_code) || 2617 (erp->function == dasd_3990_erp_compound_config))) { 2618 2619 erp = dasd_3990_erp_compound(erp, sense); 2620 2621 } else { 2622 /* 2623 * No retry left and no additional special handling 2624 * necessary 2625 */ 2626 dev_err(&device->cdev->dev, 2627 "ERP %px has run out of retries and failed\n", erp); 2628 2629 erp->status = DASD_CQR_FAILED; 2630 } 2631 2632 return erp; 2633 2634} /* end dasd_3990_erp_further_erp */ 2635 2636/* 2637 * DASD_3990_ERP_HANDLE_MATCH_ERP 2638 * 2639 * DESCRIPTION 2640 * An error occurred again and an ERP has been detected which is already 2641 * used to handle this error (e.g. retries). 2642 * All prior ERP's are asumed to be successful and therefore removed 2643 * from queue. 2644 * If retry counter of matching erp is already 0, it is checked if further 2645 * action is needed (besides retry) or if the ERP has failed. 2646 * 2647 * PARAMETER 2648 * erp_head first ERP in ERP-chain 2649 * erp ERP that handles the actual error. 2650 * (matching erp) 2651 * 2652 * RETURN VALUES 2653 * erp modified/additional ERP 2654 */ 2655static struct dasd_ccw_req * 2656dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head, 2657 struct dasd_ccw_req *erp) 2658{ 2659 2660 struct dasd_device *device = erp_head->startdev; 2661 struct dasd_ccw_req *erp_done = erp_head; /* finished req */ 2662 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */ 2663 2664 /* loop over successful ERPs and remove them from chanq */ 2665 while (erp_done != erp) { 2666 2667 if (erp_done == NULL) /* end of chain reached */ 2668 panic("Programming error in ERP! The original request was lost\n"); 2669 2670 /* remove the request from the device queue */ 2671 list_del(&erp_done->blocklist); 2672 2673 erp_free = erp_done; 2674 erp_done = erp_done->refers; 2675 2676 /* free the finished erp request */ 2677 dasd_free_erp_request(erp_free, erp_free->memdev); 2678 2679 } /* end while */ 2680 2681 if (erp->retries > 0) { 2682 2683 char *sense = dasd_get_sense(&erp->refers->irb); 2684 2685 /* check for special retries */ 2686 if (sense && erp->function == dasd_3990_erp_action_4) { 2687 2688 erp = dasd_3990_erp_action_4(erp, sense); 2689 2690 } else if (sense && 2691 erp->function == dasd_3990_erp_action_1B_32) { 2692 2693 erp = dasd_3990_update_1B(erp, sense); 2694 2695 } else if (sense && erp->function == dasd_3990_erp_int_req) { 2696 2697 erp = dasd_3990_erp_int_req(erp); 2698 2699 } else { 2700 /* simple retry */ 2701 DBF_DEV_EVENT(DBF_DEBUG, device, 2702 "%i retries left for erp %p", 2703 erp->retries, erp); 2704 2705 /* handle the request again... */ 2706 erp->status = DASD_CQR_FILLED; 2707 } 2708 2709 } else { 2710 /* no retry left - check for further necessary action */ 2711 /* if no further actions, handle rest as permanent error */ 2712 erp = dasd_3990_erp_further_erp(erp); 2713 } 2714 2715 return erp; 2716 2717} /* end dasd_3990_erp_handle_match_erp */ 2718 2719/* 2720 * DASD_3990_ERP_ACTION 2721 * 2722 * DESCRIPTION 2723 * control routine for 3990 erp actions. 2724 * Has to be called with the queue lock (namely the s390_irq_lock) acquired. 2725 * 2726 * PARAMETER 2727 * cqr failed cqr (either original cqr or already an erp) 2728 * 2729 * RETURN VALUES 2730 * erp erp-pointer to the head of the ERP action chain. 2731 * This means: 2732 * - either a ptr to an additional ERP cqr or 2733 * - the original given cqr (which's status might 2734 * be modified) 2735 */ 2736struct dasd_ccw_req * 2737dasd_3990_erp_action(struct dasd_ccw_req * cqr) 2738{ 2739 struct dasd_ccw_req *erp = NULL; 2740 struct dasd_device *device = cqr->startdev; 2741 struct dasd_ccw_req *temp_erp = NULL; 2742 2743 if (device->features & DASD_FEATURE_ERPLOG) { 2744 /* print current erp_chain */ 2745 dev_err(&device->cdev->dev, 2746 "ERP chain at BEGINNING of ERP-ACTION\n"); 2747 for (temp_erp = cqr; 2748 temp_erp != NULL; temp_erp = temp_erp->refers) { 2749 dev_err(&device->cdev->dev, 2750 "ERP %px (%02x) refers to %px\n", 2751 temp_erp, temp_erp->status, temp_erp->refers); 2752 } 2753 } 2754 2755 /* double-check if current erp/cqr was successful */ 2756 if ((scsw_cstat(&cqr->irb.scsw) == 0x00) && 2757 (scsw_dstat(&cqr->irb.scsw) == 2758 (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) { 2759 2760 DBF_DEV_EVENT(DBF_DEBUG, device, 2761 "ERP called for successful request %p" 2762 " - NO ERP necessary", cqr); 2763 2764 cqr->status = DASD_CQR_DONE; 2765 2766 return cqr; 2767 } 2768 2769 /* check if error happened before */ 2770 erp = dasd_3990_erp_in_erp(cqr); 2771 2772 if (erp == NULL) { 2773 /* no matching erp found - set up erp */ 2774 erp = dasd_3990_erp_additional_erp(cqr); 2775 if (IS_ERR(erp)) 2776 return erp; 2777 } else { 2778 /* matching erp found - set all leading erp's to DONE */ 2779 erp = dasd_3990_erp_handle_match_erp(cqr, erp); 2780 } 2781 2782 2783 /* 2784 * For path verification work we need to stick with the path that was 2785 * originally chosen so that the per path configuration data is 2786 * assigned correctly. 2787 */ 2788 if (test_bit(DASD_CQR_VERIFY_PATH, &erp->flags) && cqr->lpm) { 2789 erp->lpm = cqr->lpm; 2790 } 2791 2792 if (device->features & DASD_FEATURE_ERPLOG) { 2793 /* print current erp_chain */ 2794 dev_err(&device->cdev->dev, 2795 "ERP chain at END of ERP-ACTION\n"); 2796 for (temp_erp = erp; 2797 temp_erp != NULL; temp_erp = temp_erp->refers) { 2798 dev_err(&device->cdev->dev, 2799 "ERP %px (%02x) refers to %px\n", 2800 temp_erp, temp_erp->status, temp_erp->refers); 2801 } 2802 } 2803 2804 /* enqueue ERP request if it's a new one */ 2805 if (list_empty(&erp->blocklist)) { 2806 cqr->status = DASD_CQR_IN_ERP; 2807 /* add erp request before the cqr */ 2808 list_add_tail(&erp->blocklist, &cqr->blocklist); 2809 } 2810 2811 2812 2813 return erp; 2814 2815} /* end dasd_3990_erp_action */
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