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 #define KMSG_COMPONENT "dasd-eckd" 11 12 #include <linux/timer.h> 13 #include <asm/idals.h> 14 15 #define PRINTK_HEADER "dasd_erp(3990): " 16 17 #include "dasd_int.h" 18 #include "dasd_eckd.h" 19 20 21 struct 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 27 /* 28 ***************************************************************************** 29 * SECTION ERP HANDLING 30 ***************************************************************************** 31 */ 32 /* 33 ***************************************************************************** 34 * 24 and 32 byte sense ERP functions 35 ***************************************************************************** 36 */ 37 38 /* 39 * DASD_3990_ERP_CLEANUP 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 47 * final_status either DASD_CQR_DONE or DASD_CQR_FAILED 48 * 49 * RETURN VALUES 50 * cqr original cqr 51 */ 52 static struct dasd_ccw_req * 53 dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status) 54 { 55 struct dasd_ccw_req *cqr = erp->refers; 56 57 dasd_free_erp_request(erp, erp->memdev); 58 cqr->status = final_status; 59 return cqr; 60 61 } /* end dasd_3990_erp_cleanup */ 62 63 /* 64 * DASD_3990_ERP_BLOCK_QUEUE 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 */ 71 static void dasd_3990_erp_block_queue(struct dasd_ccw_req *erp, int expires) 72 { 73 74 struct dasd_device *device = erp->startdev; 75 unsigned long flags; 76 77 DBF_DEV_EVENT(DBF_INFO, device, 78 "blocking request queue for %is", expires/HZ); 79 80 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 81 dasd_device_set_stop_bits(device, DASD_STOPPED_PENDING); 82 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 83 erp->status = DASD_CQR_FILLED; 84 if (erp->block) 85 dasd_block_set_timer(erp->block, expires); 86 else 87 dasd_device_set_timer(device, expires); 88 } 89 90 /* 91 * DASD_3990_ERP_INT_REQ 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 */ 102 static struct dasd_ccw_req * 103 dasd_3990_erp_int_req(struct dasd_ccw_req * erp) 104 { 105 106 struct dasd_device *device = erp->startdev; 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 */ 119 dev_err(&device->cdev->dev, 120 "is offline or not installed - " 121 "INTERVENTION REQUIRED!!\n"); 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 /* 131 * DASD_3990_ERP_ALTERNATE_PATH 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 */ 144 static void 145 dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp) 146 { 147 struct dasd_device *device = erp->startdev; 148 __u8 opm; 149 unsigned long flags; 150 151 /* try alternate valid path */ 152 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 153 opm = ccw_device_get_path_mask(device->cdev); 154 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 155 if (erp->lpm == 0) 156 erp->lpm = dasd_path_get_opm(device) & 157 ~(erp->irb.esw.esw0.sublog.lpum); 158 else 159 erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum); 160 161 if ((erp->lpm & opm) != 0x00) { 162 163 DBF_DEV_EVENT(DBF_WARNING, device, 164 "try alternate lpm=%x (lpum=%x / opm=%x)", 165 erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm); 166 167 /* reset status to submit the request again... */ 168 erp->status = DASD_CQR_FILLED; 169 erp->retries = 10; 170 } else { 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); 174 175 /* post request with permanent error */ 176 erp->status = DASD_CQR_FAILED; 177 } 178 } /* end dasd_3990_erp_alternate_path */ 179 180 /* 181 * DASD_3990_ERP_DCTL 182 * 183 * DESCRIPTION 184 * Setup cqr to do the Diagnostic Control (DCTL) command with an 185 * Inhibit Write subcommand (0x20) and the given modifier. 186 * 187 * PARAMETER 188 * erp pointer to the current (failed) ERP 189 * modifier subcommand modifier 190 * 191 * RETURN VALUES 192 * dctl_cqr pointer to NEW dctl_cqr 193 * 194 */ 195 static struct dasd_ccw_req * 196 dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier) 197 { 198 199 struct dasd_device *device = erp->startdev; 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(erp->magic, 1, 205 sizeof(struct DCTL_data), 206 device); 207 if (IS_ERR(dctl_cqr)) { 208 dev_err(&device->cdev->dev, 209 "Unable to allocate DCTL-CQR\n"); 210 erp->status = DASD_CQR_FAILED; 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; 220 memset(ccw, 0, sizeof(struct ccw1)); 221 ccw->cmd_code = CCW_CMD_DCTL; 222 ccw->count = 4; 223 ccw->cda = (__u32)virt_to_phys(DCTL_data); 224 dctl_cqr->flags = erp->flags; 225 dctl_cqr->function = dasd_3990_erp_DCTL; 226 dctl_cqr->refers = erp; 227 dctl_cqr->startdev = device; 228 dctl_cqr->memdev = device; 229 dctl_cqr->magic = erp->magic; 230 dctl_cqr->expires = 5 * 60 * HZ; 231 dctl_cqr->retries = 2; 232 233 dctl_cqr->buildclk = get_tod_clock(); 234 235 dctl_cqr->status = DASD_CQR_FILLED; 236 237 return dctl_cqr; 238 239 } /* end dasd_3990_erp_DCTL */ 240 241 /* 242 * DASD_3990_ERP_ACTION_1 243 * 244 * DESCRIPTION 245 * Setup ERP to do the ERP action 1 (see Reference manual). 246 * Repeat the operation on a different channel path. 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. 254 * 255 * PARAMETER 256 * erp pointer to the current ERP 257 * 258 * RETURN VALUES 259 * erp pointer to the ERP 260 * 261 */ 262 static struct dasd_ccw_req *dasd_3990_erp_action_1_sec(struct dasd_ccw_req *erp) 263 { 264 erp->function = dasd_3990_erp_action_1_sec; 265 dasd_3990_erp_alternate_path(erp); 266 return erp; 267 } 268 269 static struct dasd_ccw_req *dasd_3990_erp_action_1(struct dasd_ccw_req *erp) 270 { 271 erp->function = dasd_3990_erp_action_1; 272 dasd_3990_erp_alternate_path(erp); 273 if (erp->status == DASD_CQR_FAILED && 274 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) { 275 erp->status = DASD_CQR_FILLED; 276 erp->retries = 10; 277 erp->lpm = dasd_path_get_opm(erp->startdev); 278 erp->function = dasd_3990_erp_action_1_sec; 279 } 280 return erp; 281 } /* end dasd_3990_erp_action_1(b) */ 282 283 /* 284 * DASD_3990_ERP_ACTION_4 285 * 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 */ 301 static struct dasd_ccw_req * 302 dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense) 303 { 304 305 struct dasd_device *device = erp->startdev; 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) { 311 312 DBF_DEV_EVENT(DBF_INFO, device, "%s", 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 { 319 if (sense && (sense[25] == 0x1D)) { /* state change pending */ 320 321 DBF_DEV_EVENT(DBF_INFO, device, 322 "waiting for state change pending " 323 "interrupt, %d retries left", 324 erp->retries); 325 326 dasd_3990_erp_block_queue(erp, 30*HZ); 327 328 } else if (sense && (sense[25] == 0x1E)) { /* busy */ 329 DBF_DEV_EVENT(DBF_INFO, device, 330 "busy - redriving request later, " 331 "%d retries left", 332 erp->retries); 333 dasd_3990_erp_block_queue(erp, HZ); 334 } else { 335 /* no state change pending - retry */ 336 DBF_DEV_EVENT(DBF_INFO, device, 337 "redriving request immediately, " 338 "%d retries left", 339 erp->retries); 340 erp->status = DASD_CQR_FILLED; 341 } 342 } 343 344 return erp; 345 346 } /* end dasd_3990_erp_action_4 */ 347 348 /* 349 ***************************************************************************** 350 * 24 byte sense ERP functions (only) 351 ***************************************************************************** 352 */ 353 354 /* 355 * DASD_3990_ERP_ACTION_5 356 * 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 */ 368 static struct dasd_ccw_req * 369 dasd_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 390 * 391 * RETURN VALUES 392 * void 393 */ 394 static void 395 dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense) 396 { 397 398 struct dasd_device *device = erp->startdev; 399 char msg_format = (sense[7] & 0xF0); 400 char msg_no = (sense[7] & 0x0F); 401 char errorstring[ERRORLENGTH]; 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: 412 dev_warn(&device->cdev->dev, 413 "FORMAT 0 - Invalid Command\n"); 414 break; 415 case 0x02: 416 dev_warn(&device->cdev->dev, 417 "FORMAT 0 - Invalid Command " 418 "Sequence\n"); 419 break; 420 case 0x03: 421 dev_warn(&device->cdev->dev, 422 "FORMAT 0 - CCW Count less than " 423 "required\n"); 424 break; 425 case 0x04: 426 dev_warn(&device->cdev->dev, 427 "FORMAT 0 - Invalid Parameter\n"); 428 break; 429 case 0x05: 430 dev_warn(&device->cdev->dev, 431 "FORMAT 0 - Diagnostic of Special" 432 " Command Violates File Mask\n"); 433 break; 434 case 0x07: 435 dev_warn(&device->cdev->dev, 436 "FORMAT 0 - Channel Returned with " 437 "Incorrect retry CCW\n"); 438 break; 439 case 0x08: 440 dev_warn(&device->cdev->dev, 441 "FORMAT 0 - Reset Notification\n"); 442 break; 443 case 0x09: 444 dev_warn(&device->cdev->dev, 445 "FORMAT 0 - Storage Path Restart\n"); 446 break; 447 case 0x0A: 448 dev_warn(&device->cdev->dev, 449 "FORMAT 0 - Channel requested " 450 "... %02x\n", sense[8]); 451 break; 452 case 0x0B: 453 dev_warn(&device->cdev->dev, 454 "FORMAT 0 - Invalid Defective/" 455 "Alternate Track Pointer\n"); 456 break; 457 case 0x0C: 458 dev_warn(&device->cdev->dev, 459 "FORMAT 0 - DPS Installation " 460 "Check\n"); 461 break; 462 case 0x0E: 463 dev_warn(&device->cdev->dev, 464 "FORMAT 0 - Command Invalid on " 465 "Secondary Address\n"); 466 break; 467 case 0x0F: 468 dev_warn(&device->cdev->dev, 469 "FORMAT 0 - Status Not As " 470 "Required: reason %02x\n", 471 sense[8]); 472 break; 473 default: 474 dev_warn(&device->cdev->dev, 475 "FORMAT 0 - Reserved\n"); 476 } 477 } else { 478 switch (msg_no) { 479 case 0x00: /* No Message */ 480 break; 481 case 0x01: 482 dev_warn(&device->cdev->dev, 483 "FORMAT 0 - Device Error " 484 "Source\n"); 485 break; 486 case 0x02: 487 dev_warn(&device->cdev->dev, 488 "FORMAT 0 - Reserved\n"); 489 break; 490 case 0x03: 491 dev_warn(&device->cdev->dev, 492 "FORMAT 0 - Device Fenced - " 493 "device = %02x\n", sense[4]); 494 break; 495 case 0x04: 496 dev_warn(&device->cdev->dev, 497 "FORMAT 0 - Data Pinned for " 498 "Device\n"); 499 break; 500 default: 501 dev_warn(&device->cdev->dev, 502 "FORMAT 0 - Reserved\n"); 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: 512 dev_warn(&device->cdev->dev, 513 "FORMAT 1 - Device Status 1 not as " 514 "expected\n"); 515 break; 516 case 0x03: 517 dev_warn(&device->cdev->dev, 518 "FORMAT 1 - Index missing\n"); 519 break; 520 case 0x04: 521 dev_warn(&device->cdev->dev, 522 "FORMAT 1 - Interruption cannot be " 523 "reset\n"); 524 break; 525 case 0x05: 526 dev_warn(&device->cdev->dev, 527 "FORMAT 1 - Device did not respond to " 528 "selection\n"); 529 break; 530 case 0x06: 531 dev_warn(&device->cdev->dev, 532 "FORMAT 1 - Device check-2 error or Set " 533 "Sector is not complete\n"); 534 break; 535 case 0x07: 536 dev_warn(&device->cdev->dev, 537 "FORMAT 1 - Head address does not " 538 "compare\n"); 539 break; 540 case 0x08: 541 dev_warn(&device->cdev->dev, 542 "FORMAT 1 - Device status 1 not valid\n"); 543 break; 544 case 0x09: 545 dev_warn(&device->cdev->dev, 546 "FORMAT 1 - Device not ready\n"); 547 break; 548 case 0x0A: 549 dev_warn(&device->cdev->dev, 550 "FORMAT 1 - Track physical address did " 551 "not compare\n"); 552 break; 553 case 0x0B: 554 dev_warn(&device->cdev->dev, 555 "FORMAT 1 - Missing device address bit\n"); 556 break; 557 case 0x0C: 558 dev_warn(&device->cdev->dev, 559 "FORMAT 1 - Drive motor switch is off\n"); 560 break; 561 case 0x0D: 562 dev_warn(&device->cdev->dev, 563 "FORMAT 1 - Seek incomplete\n"); 564 break; 565 case 0x0E: 566 dev_warn(&device->cdev->dev, 567 "FORMAT 1 - Cylinder address did not " 568 "compare\n"); 569 break; 570 case 0x0F: 571 dev_warn(&device->cdev->dev, 572 "FORMAT 1 - Offset active cannot be " 573 "reset\n"); 574 break; 575 default: 576 dev_warn(&device->cdev->dev, 577 "FORMAT 1 - Reserved\n"); 578 } 579 break; 580 581 case 0x20: /* Format 2 - 3990 Equipment Checks */ 582 switch (msg_no) { 583 case 0x08: 584 dev_warn(&device->cdev->dev, 585 "FORMAT 2 - 3990 check-2 error\n"); 586 break; 587 case 0x0E: 588 dev_warn(&device->cdev->dev, 589 "FORMAT 2 - Support facility errors\n"); 590 break; 591 case 0x0F: 592 dev_warn(&device->cdev->dev, 593 "FORMAT 2 - Microcode detected error " 594 "%02x\n", 595 sense[8]); 596 break; 597 default: 598 dev_warn(&device->cdev->dev, 599 "FORMAT 2 - Reserved\n"); 600 } 601 break; 602 603 case 0x30: /* Format 3 - 3990 Control Checks */ 604 switch (msg_no) { 605 case 0x0F: 606 dev_warn(&device->cdev->dev, 607 "FORMAT 3 - Allegiance terminated\n"); 608 break; 609 default: 610 dev_warn(&device->cdev->dev, 611 "FORMAT 3 - Reserved\n"); 612 } 613 break; 614 615 case 0x40: /* Format 4 - Data Checks */ 616 switch (msg_no) { 617 case 0x00: 618 dev_warn(&device->cdev->dev, 619 "FORMAT 4 - Home address area error\n"); 620 break; 621 case 0x01: 622 dev_warn(&device->cdev->dev, 623 "FORMAT 4 - Count area error\n"); 624 break; 625 case 0x02: 626 dev_warn(&device->cdev->dev, 627 "FORMAT 4 - Key area error\n"); 628 break; 629 case 0x03: 630 dev_warn(&device->cdev->dev, 631 "FORMAT 4 - Data area error\n"); 632 break; 633 case 0x04: 634 dev_warn(&device->cdev->dev, 635 "FORMAT 4 - No sync byte in home address " 636 "area\n"); 637 break; 638 case 0x05: 639 dev_warn(&device->cdev->dev, 640 "FORMAT 4 - No sync byte in count address " 641 "area\n"); 642 break; 643 case 0x06: 644 dev_warn(&device->cdev->dev, 645 "FORMAT 4 - No sync byte in key area\n"); 646 break; 647 case 0x07: 648 dev_warn(&device->cdev->dev, 649 "FORMAT 4 - No sync byte in data area\n"); 650 break; 651 case 0x08: 652 dev_warn(&device->cdev->dev, 653 "FORMAT 4 - Home address area error; " 654 "offset active\n"); 655 break; 656 case 0x09: 657 dev_warn(&device->cdev->dev, 658 "FORMAT 4 - Count area error; offset " 659 "active\n"); 660 break; 661 case 0x0A: 662 dev_warn(&device->cdev->dev, 663 "FORMAT 4 - Key area error; offset " 664 "active\n"); 665 break; 666 case 0x0B: 667 dev_warn(&device->cdev->dev, 668 "FORMAT 4 - Data area error; " 669 "offset active\n"); 670 break; 671 case 0x0C: 672 dev_warn(&device->cdev->dev, 673 "FORMAT 4 - No sync byte in home " 674 "address area; offset active\n"); 675 break; 676 case 0x0D: 677 dev_warn(&device->cdev->dev, 678 "FORMAT 4 - No sync byte in count " 679 "address area; offset active\n"); 680 break; 681 case 0x0E: 682 dev_warn(&device->cdev->dev, 683 "FORMAT 4 - No sync byte in key area; " 684 "offset active\n"); 685 break; 686 case 0x0F: 687 dev_warn(&device->cdev->dev, 688 "FORMAT 4 - No sync byte in data area; " 689 "offset active\n"); 690 break; 691 default: 692 dev_warn(&device->cdev->dev, 693 "FORMAT 4 - Reserved\n"); 694 } 695 break; 696 697 case 0x50: /* Format 5 - Data Check with displacement information */ 698 switch (msg_no) { 699 case 0x00: 700 dev_warn(&device->cdev->dev, 701 "FORMAT 5 - Data Check in the " 702 "home address area\n"); 703 break; 704 case 0x01: 705 dev_warn(&device->cdev->dev, 706 "FORMAT 5 - Data Check in the count " 707 "area\n"); 708 break; 709 case 0x02: 710 dev_warn(&device->cdev->dev, 711 "FORMAT 5 - Data Check in the key area\n"); 712 break; 713 case 0x03: 714 dev_warn(&device->cdev->dev, 715 "FORMAT 5 - Data Check in the data " 716 "area\n"); 717 break; 718 case 0x08: 719 dev_warn(&device->cdev->dev, 720 "FORMAT 5 - Data Check in the " 721 "home address area; offset active\n"); 722 break; 723 case 0x09: 724 dev_warn(&device->cdev->dev, 725 "FORMAT 5 - Data Check in the count area; " 726 "offset active\n"); 727 break; 728 case 0x0A: 729 dev_warn(&device->cdev->dev, 730 "FORMAT 5 - Data Check in the key area; " 731 "offset active\n"); 732 break; 733 case 0x0B: 734 dev_warn(&device->cdev->dev, 735 "FORMAT 5 - Data Check in the data area; " 736 "offset active\n"); 737 break; 738 default: 739 dev_warn(&device->cdev->dev, 740 "FORMAT 5 - Reserved\n"); 741 } 742 break; 743 744 case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */ 745 switch (msg_no) { 746 case 0x00: 747 dev_warn(&device->cdev->dev, 748 "FORMAT 6 - Overrun on channel A\n"); 749 break; 750 case 0x01: 751 dev_warn(&device->cdev->dev, 752 "FORMAT 6 - Overrun on channel B\n"); 753 break; 754 case 0x02: 755 dev_warn(&device->cdev->dev, 756 "FORMAT 6 - Overrun on channel C\n"); 757 break; 758 case 0x03: 759 dev_warn(&device->cdev->dev, 760 "FORMAT 6 - Overrun on channel D\n"); 761 break; 762 case 0x04: 763 dev_warn(&device->cdev->dev, 764 "FORMAT 6 - Overrun on channel E\n"); 765 break; 766 case 0x05: 767 dev_warn(&device->cdev->dev, 768 "FORMAT 6 - Overrun on channel F\n"); 769 break; 770 case 0x06: 771 dev_warn(&device->cdev->dev, 772 "FORMAT 6 - Overrun on channel G\n"); 773 break; 774 case 0x07: 775 dev_warn(&device->cdev->dev, 776 "FORMAT 6 - Overrun on channel H\n"); 777 break; 778 default: 779 dev_warn(&device->cdev->dev, 780 "FORMAT 6 - Reserved\n"); 781 } 782 break; 783 784 case 0x70: /* Format 7 - Device Connection Control Checks */ 785 switch (msg_no) { 786 case 0x00: 787 dev_warn(&device->cdev->dev, 788 "FORMAT 7 - RCC initiated by a connection " 789 "check alert\n"); 790 break; 791 case 0x01: 792 dev_warn(&device->cdev->dev, 793 "FORMAT 7 - RCC 1 sequence not " 794 "successful\n"); 795 break; 796 case 0x02: 797 dev_warn(&device->cdev->dev, 798 "FORMAT 7 - RCC 1 and RCC 2 sequences not " 799 "successful\n"); 800 break; 801 case 0x03: 802 dev_warn(&device->cdev->dev, 803 "FORMAT 7 - Invalid tag-in during " 804 "selection sequence\n"); 805 break; 806 case 0x04: 807 dev_warn(&device->cdev->dev, 808 "FORMAT 7 - extra RCC required\n"); 809 break; 810 case 0x05: 811 dev_warn(&device->cdev->dev, 812 "FORMAT 7 - Invalid DCC selection " 813 "response or timeout\n"); 814 break; 815 case 0x06: 816 dev_warn(&device->cdev->dev, 817 "FORMAT 7 - Missing end operation; device " 818 "transfer complete\n"); 819 break; 820 case 0x07: 821 dev_warn(&device->cdev->dev, 822 "FORMAT 7 - Missing end operation; device " 823 "transfer incomplete\n"); 824 break; 825 case 0x08: 826 dev_warn(&device->cdev->dev, 827 "FORMAT 7 - Invalid tag-in for an " 828 "immediate command sequence\n"); 829 break; 830 case 0x09: 831 dev_warn(&device->cdev->dev, 832 "FORMAT 7 - Invalid tag-in for an " 833 "extended command sequence\n"); 834 break; 835 case 0x0A: 836 dev_warn(&device->cdev->dev, 837 "FORMAT 7 - 3990 microcode time out when " 838 "stopping selection\n"); 839 break; 840 case 0x0B: 841 dev_warn(&device->cdev->dev, 842 "FORMAT 7 - No response to selection " 843 "after a poll interruption\n"); 844 break; 845 case 0x0C: 846 dev_warn(&device->cdev->dev, 847 "FORMAT 7 - Permanent path error (DASD " 848 "controller not available)\n"); 849 break; 850 case 0x0D: 851 dev_warn(&device->cdev->dev, 852 "FORMAT 7 - DASD controller not available" 853 " on disconnected command chain\n"); 854 break; 855 default: 856 dev_warn(&device->cdev->dev, 857 "FORMAT 7 - Reserved\n"); 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: 865 dev_warn(&device->cdev->dev, 866 "FORMAT 8 - Error correction code " 867 "hardware fault\n"); 868 break; 869 case 0x03: 870 dev_warn(&device->cdev->dev, 871 "FORMAT 8 - Unexpected end operation " 872 "response code\n"); 873 break; 874 case 0x04: 875 dev_warn(&device->cdev->dev, 876 "FORMAT 8 - End operation with transfer " 877 "count not zero\n"); 878 break; 879 case 0x05: 880 dev_warn(&device->cdev->dev, 881 "FORMAT 8 - End operation with transfer " 882 "count zero\n"); 883 break; 884 case 0x06: 885 dev_warn(&device->cdev->dev, 886 "FORMAT 8 - DPS checks after a system " 887 "reset or selective reset\n"); 888 break; 889 case 0x07: 890 dev_warn(&device->cdev->dev, 891 "FORMAT 8 - DPS cannot be filled\n"); 892 break; 893 case 0x08: 894 dev_warn(&device->cdev->dev, 895 "FORMAT 8 - Short busy time-out during " 896 "device selection\n"); 897 break; 898 case 0x09: 899 dev_warn(&device->cdev->dev, 900 "FORMAT 8 - DASD controller failed to " 901 "set or reset the long busy latch\n"); 902 break; 903 case 0x0A: 904 dev_warn(&device->cdev->dev, 905 "FORMAT 8 - No interruption from device " 906 "during a command chain\n"); 907 break; 908 default: 909 dev_warn(&device->cdev->dev, 910 "FORMAT 8 - Reserved\n"); 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: 919 dev_warn(&device->cdev->dev, 920 "FORMAT 9 - Device check-2 error\n"); 921 break; 922 case 0x07: 923 dev_warn(&device->cdev->dev, 924 "FORMAT 9 - Head address did not " 925 "compare\n"); 926 break; 927 case 0x0A: 928 dev_warn(&device->cdev->dev, 929 "FORMAT 9 - Track physical address did " 930 "not compare while oriented\n"); 931 break; 932 case 0x0E: 933 dev_warn(&device->cdev->dev, 934 "FORMAT 9 - Cylinder address did not " 935 "compare\n"); 936 break; 937 default: 938 dev_warn(&device->cdev->dev, 939 "FORMAT 9 - Reserved\n"); 940 } 941 break; 942 943 case 0xF0: /* Format F - Cache Storage Checks */ 944 switch (msg_no) { 945 case 0x00: 946 dev_warn(&device->cdev->dev, 947 "FORMAT F - Operation Terminated\n"); 948 break; 949 case 0x01: 950 dev_warn(&device->cdev->dev, 951 "FORMAT F - Subsystem Processing Error\n"); 952 break; 953 case 0x02: 954 dev_warn(&device->cdev->dev, 955 "FORMAT F - Cache or nonvolatile storage " 956 "equipment failure\n"); 957 break; 958 case 0x04: 959 dev_warn(&device->cdev->dev, 960 "FORMAT F - Caching terminated\n"); 961 break; 962 case 0x06: 963 dev_warn(&device->cdev->dev, 964 "FORMAT F - Cache fast write access not " 965 "authorized\n"); 966 break; 967 case 0x07: 968 dev_warn(&device->cdev->dev, 969 "FORMAT F - Track format incorrect\n"); 970 break; 971 case 0x09: 972 dev_warn(&device->cdev->dev, 973 "FORMAT F - Caching reinitiated\n"); 974 break; 975 case 0x0A: 976 dev_warn(&device->cdev->dev, 977 "FORMAT F - Nonvolatile storage " 978 "terminated\n"); 979 break; 980 case 0x0B: 981 dev_warn(&device->cdev->dev, 982 "FORMAT F - Volume is suspended duplex\n"); 983 /* call extended error reporting (EER) */ 984 dasd_eer_write(device, erp->refers, 985 DASD_EER_PPRCSUSPEND); 986 break; 987 case 0x0C: 988 dev_warn(&device->cdev->dev, 989 "FORMAT F - Subsystem status cannot be " 990 "determined\n"); 991 break; 992 case 0x0D: 993 dev_warn(&device->cdev->dev, 994 "FORMAT F - Caching status reset to " 995 "default\n"); 996 break; 997 case 0x0E: 998 dev_warn(&device->cdev->dev, 999 "FORMAT F - DASD Fast Write inhibited\n"); 1000 break; 1001 default: 1002 dev_warn(&device->cdev->dev, 1003 "FORMAT F - Reserved\n"); 1004 } 1005 break; 1006 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); 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 1027 * 1028 * RETURN VALUES 1029 * erp 'new' erp_head - pointer to new ERP 1030 */ 1031 static struct dasd_ccw_req * 1032 dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense) 1033 { 1034 1035 struct dasd_device *device = erp->startdev; 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 1042 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1043 "Command Reject - environmental data present"); 1044 1045 dasd_3990_handle_env_data(erp, sense); 1046 1047 erp->retries = 5; 1048 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); 1053 } else if (sense[7] == SNS7_INVALID_ON_SEC) { 1054 dev_err(&device->cdev->dev, "An I/O request was rejected on a copy pair secondary device\n"); 1055 /* suppress dump of sense data for this error */ 1056 set_bit(DASD_CQR_SUPPRESS_CR, &erp->refers->flags); 1057 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1058 } else { 1059 /* fatal error - set status to FAILED 1060 internal error 09 - Command Reject */ 1061 if (!test_bit(DASD_CQR_SUPPRESS_CR, &erp->flags)) 1062 dev_err(&device->cdev->dev, 1063 "An error occurred in the DASD device driver, reason=09\n"); 1064 1065 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1066 } 1067 1068 return erp; 1069 1070 } /* end dasd_3990_erp_com_rej */ 1071 1072 /* 1073 * DASD_3990_ERP_BUS_OUT 1074 * 1075 * DESCRIPTION 1076 * Handles 24 byte 'Bus Out Parity Check' error. 1077 * 1078 * PARAMETER 1079 * erp current erp_head 1080 * RETURN VALUES 1081 * erp new erp_head - pointer to new ERP 1082 */ 1083 static struct dasd_ccw_req * 1084 dasd_3990_erp_bus_out(struct dasd_ccw_req * erp) 1085 { 1086 1087 struct dasd_device *device = erp->startdev; 1088 1089 /* first time set initial retry counter and erp_function */ 1090 /* and retry once without blocking queue */ 1091 /* (this enables easier enqueing of the cqr) */ 1092 if (erp->function != dasd_3990_erp_bus_out) { 1093 erp->retries = 256; 1094 erp->function = dasd_3990_erp_bus_out; 1095 1096 } else { 1097 1098 /* issue a message and wait for 'device ready' interrupt */ 1099 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1100 "bus out parity error or BOPC requested by " 1101 "channel"); 1102 1103 dasd_3990_erp_block_queue(erp, 60*HZ); 1104 1105 } 1106 1107 return erp; 1108 1109 } /* end dasd_3990_erp_bus_out */ 1110 1111 /* 1112 * DASD_3990_ERP_EQUIP_CHECK 1113 * 1114 * DESCRIPTION 1115 * Handles 24 byte 'Equipment Check' error. 1116 * 1117 * PARAMETER 1118 * erp current erp_head 1119 * RETURN VALUES 1120 * erp new erp_head - pointer to new ERP 1121 */ 1122 static struct dasd_ccw_req * 1123 dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense) 1124 { 1125 1126 struct dasd_device *device = erp->startdev; 1127 1128 erp->function = dasd_3990_erp_equip_check; 1129 1130 if (sense[1] & SNS1_WRITE_INHIBITED) { 1131 dev_info(&device->cdev->dev, 1132 "Write inhibited path encountered\n"); 1133 1134 /* vary path offline 1135 internal error 04 - Path should be varied off-line.*/ 1136 dev_err(&device->cdev->dev, "An error occurred in the DASD " 1137 "device driver, reason=%s\n", "04"); 1138 1139 erp = dasd_3990_erp_action_1(erp); 1140 1141 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1142 1143 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1144 "Equipment Check - " "environmental data present"); 1145 1146 dasd_3990_handle_env_data(erp, sense); 1147 1148 erp = dasd_3990_erp_action_4(erp, sense); 1149 1150 } else if (sense[1] & SNS1_PERM_ERR) { 1151 1152 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1153 "Equipment Check - retry exhausted or " 1154 "undesirable"); 1155 1156 erp = dasd_3990_erp_action_1(erp); 1157 1158 } else { 1159 /* all other equipment checks - Action 5 */ 1160 /* rest is done when retries == 0 */ 1161 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1162 "Equipment check or processing error"); 1163 1164 erp = dasd_3990_erp_action_5(erp); 1165 } 1166 return erp; 1167 1168 } /* end dasd_3990_erp_equip_check */ 1169 1170 /* 1171 * DASD_3990_ERP_DATA_CHECK 1172 * 1173 * DESCRIPTION 1174 * Handles 24 byte 'Data Check' error. 1175 * 1176 * PARAMETER 1177 * erp current erp_head 1178 * RETURN VALUES 1179 * erp new erp_head - pointer to new ERP 1180 */ 1181 static struct dasd_ccw_req * 1182 dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense) 1183 { 1184 1185 struct dasd_device *device = erp->startdev; 1186 1187 erp->function = dasd_3990_erp_data_check; 1188 1189 if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */ 1190 1191 /* issue message that the data has been corrected */ 1192 dev_emerg(&device->cdev->dev, 1193 "Data recovered during retry with PCI " 1194 "fetch mode active\n"); 1195 1196 /* not possible to handle this situation in Linux */ 1197 panic("No way to inform application about the possibly " 1198 "incorrect data"); 1199 1200 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1201 1202 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1203 "Uncorrectable data check recovered secondary " 1204 "addr of duplex pair"); 1205 1206 erp = dasd_3990_erp_action_4(erp, sense); 1207 1208 } else if (sense[1] & SNS1_PERM_ERR) { 1209 1210 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1211 "Uncorrectable data check with internal " 1212 "retry exhausted"); 1213 1214 erp = dasd_3990_erp_action_1(erp); 1215 1216 } else { 1217 /* all other data checks */ 1218 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1219 "Uncorrectable data check with retry count " 1220 "exhausted..."); 1221 1222 erp = dasd_3990_erp_action_5(erp); 1223 } 1224 1225 return erp; 1226 1227 } /* end dasd_3990_erp_data_check */ 1228 1229 /* 1230 * DASD_3990_ERP_OVERRUN 1231 * 1232 * DESCRIPTION 1233 * Handles 24 byte 'Overrun' error. 1234 * 1235 * PARAMETER 1236 * erp current erp_head 1237 * RETURN VALUES 1238 * erp new erp_head - pointer to new ERP 1239 */ 1240 static struct dasd_ccw_req * 1241 dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense) 1242 { 1243 1244 struct dasd_device *device = erp->startdev; 1245 1246 erp->function = dasd_3990_erp_overrun; 1247 1248 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1249 "Overrun - service overrun or overrun" 1250 " error requested by channel"); 1251 1252 erp = dasd_3990_erp_action_5(erp); 1253 1254 return erp; 1255 1256 } /* end dasd_3990_erp_overrun */ 1257 1258 /* 1259 * DASD_3990_ERP_INV_FORMAT 1260 * 1261 * DESCRIPTION 1262 * Handles 24 byte 'Invalid Track Format' error. 1263 * 1264 * PARAMETER 1265 * erp current erp_head 1266 * RETURN VALUES 1267 * erp new erp_head - pointer to new ERP 1268 */ 1269 static struct dasd_ccw_req * 1270 dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense) 1271 { 1272 1273 struct dasd_device *device = erp->startdev; 1274 1275 erp->function = dasd_3990_erp_inv_format; 1276 1277 if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1278 1279 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1280 "Track format error when destaging or " 1281 "staging data"); 1282 1283 dasd_3990_handle_env_data(erp, sense); 1284 1285 erp = dasd_3990_erp_action_4(erp, sense); 1286 1287 } else { 1288 /* internal error 06 - The track format is not valid*/ 1289 dev_err(&device->cdev->dev, 1290 "An error occurred in the DASD device driver, " 1291 "reason=%s\n", "06"); 1292 1293 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1294 } 1295 1296 return erp; 1297 1298 } /* end dasd_3990_erp_inv_format */ 1299 1300 /* 1301 * DASD_3990_ERP_EOC 1302 * 1303 * DESCRIPTION 1304 * Handles 24 byte 'End-of-Cylinder' error. 1305 * 1306 * PARAMETER 1307 * erp already added default erp 1308 * RETURN VALUES 1309 * erp pointer to original (failed) cqr. 1310 */ 1311 static struct dasd_ccw_req * 1312 dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense) 1313 { 1314 1315 struct dasd_device *device = default_erp->startdev; 1316 1317 dev_err(&device->cdev->dev, 1318 "The cylinder data for accessing the DASD is inconsistent\n"); 1319 1320 /* implement action 7 - BUG */ 1321 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1322 1323 } /* end dasd_3990_erp_EOC */ 1324 1325 /* 1326 * DASD_3990_ERP_ENV_DATA 1327 * 1328 * DESCRIPTION 1329 * Handles 24 byte 'Environmental-Data Present' error. 1330 * 1331 * PARAMETER 1332 * erp current erp_head 1333 * RETURN VALUES 1334 * erp new erp_head - pointer to new ERP 1335 */ 1336 static struct dasd_ccw_req * 1337 dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense) 1338 { 1339 1340 struct dasd_device *device = erp->startdev; 1341 1342 erp->function = dasd_3990_erp_env_data; 1343 1344 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Environmental data present"); 1345 1346 dasd_3990_handle_env_data(erp, sense); 1347 1348 /* don't retry on disabled interface */ 1349 if (sense[7] != 0x0F) { 1350 erp = dasd_3990_erp_action_4(erp, sense); 1351 } else { 1352 erp->status = DASD_CQR_FILLED; 1353 } 1354 1355 return erp; 1356 1357 } /* end dasd_3990_erp_env_data */ 1358 1359 /* 1360 * DASD_3990_ERP_NO_REC 1361 * 1362 * DESCRIPTION 1363 * Handles 24 byte 'No Record Found' error. 1364 * 1365 * PARAMETER 1366 * erp already added default ERP 1367 * 1368 * RETURN VALUES 1369 * erp new erp_head - pointer to new ERP 1370 */ 1371 static struct dasd_ccw_req * 1372 dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense) 1373 { 1374 1375 struct dasd_device *device = default_erp->startdev; 1376 1377 /* 1378 * In some cases the 'No Record Found' error might be expected and 1379 * log messages shouldn't be written then. 1380 * Check if the according suppress bit is set. 1381 */ 1382 if (!test_bit(DASD_CQR_SUPPRESS_NRF, &default_erp->flags)) 1383 dev_err(&device->cdev->dev, 1384 "The specified record was not found\n"); 1385 1386 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1387 1388 } /* end dasd_3990_erp_no_rec */ 1389 1390 /* 1391 * DASD_3990_ERP_FILE_PROT 1392 * 1393 * DESCRIPTION 1394 * Handles 24 byte 'File Protected' error. 1395 * Note: Seek related recovery is not implemented because 1396 * wee don't use the seek command yet. 1397 * 1398 * PARAMETER 1399 * erp current erp_head 1400 * RETURN VALUES 1401 * erp new erp_head - pointer to new ERP 1402 */ 1403 static struct dasd_ccw_req * 1404 dasd_3990_erp_file_prot(struct dasd_ccw_req * erp) 1405 { 1406 1407 struct dasd_device *device = erp->startdev; 1408 1409 dev_err(&device->cdev->dev, 1410 "Accessing the DASD failed because of a hardware error\n"); 1411 1412 return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1413 1414 } /* end dasd_3990_erp_file_prot */ 1415 1416 /* 1417 * DASD_3990_ERP_INSPECT_ALIAS 1418 * 1419 * DESCRIPTION 1420 * Checks if the original request was started on an alias device. 1421 * If yes, it modifies the original and the erp request so that 1422 * the erp request can be started on a base device. 1423 * 1424 * PARAMETER 1425 * erp pointer to the currently created default ERP 1426 * 1427 * RETURN VALUES 1428 * erp pointer to the modified ERP, or NULL 1429 */ 1430 1431 static struct dasd_ccw_req *dasd_3990_erp_inspect_alias( 1432 struct dasd_ccw_req *erp) 1433 { 1434 struct dasd_ccw_req *cqr = erp->refers; 1435 char *sense; 1436 1437 if (cqr->block && 1438 (cqr->block->base != cqr->startdev)) { 1439 1440 sense = dasd_get_sense(&erp->refers->irb); 1441 /* 1442 * dynamic pav may have changed base alias mapping 1443 */ 1444 if (!test_bit(DASD_FLAG_OFFLINE, &cqr->startdev->flags) && sense 1445 && (sense[0] == 0x10) && (sense[7] == 0x0F) 1446 && (sense[8] == 0x67)) { 1447 /* 1448 * remove device from alias handling to prevent new 1449 * requests from being scheduled on the 1450 * wrong alias device 1451 */ 1452 dasd_alias_remove_device(cqr->startdev); 1453 1454 /* schedule worker to reload device */ 1455 dasd_reload_device(cqr->startdev); 1456 } 1457 1458 if (cqr->startdev->features & DASD_FEATURE_ERPLOG) { 1459 DBF_DEV_EVENT(DBF_ERR, cqr->startdev, 1460 "ERP on alias device for request %p," 1461 " recover on base device %s", cqr, 1462 dev_name(&cqr->block->base->cdev->dev)); 1463 } 1464 dasd_eckd_reset_ccw_to_base_io(cqr); 1465 erp->startdev = cqr->block->base; 1466 erp->function = dasd_3990_erp_inspect_alias; 1467 return erp; 1468 } else 1469 return NULL; 1470 } 1471 1472 1473 /* 1474 * DASD_3990_ERP_INSPECT_24 1475 * 1476 * DESCRIPTION 1477 * Does a detailed inspection of the 24 byte sense data 1478 * and sets up a related error recovery action. 1479 * 1480 * PARAMETER 1481 * sense sense data of the actual error 1482 * erp pointer to the currently created default ERP 1483 * 1484 * RETURN VALUES 1485 * erp pointer to the (addtitional) ERP 1486 */ 1487 static struct dasd_ccw_req * 1488 dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense) 1489 { 1490 1491 struct dasd_ccw_req *erp_filled = NULL; 1492 1493 /* Check sense for .... */ 1494 /* 'Command Reject' */ 1495 if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) { 1496 erp_filled = dasd_3990_erp_com_rej(erp, sense); 1497 } 1498 /* 'Intervention Required' */ 1499 if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) { 1500 erp_filled = dasd_3990_erp_int_req(erp); 1501 } 1502 /* 'Bus Out Parity Check' */ 1503 if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) { 1504 erp_filled = dasd_3990_erp_bus_out(erp); 1505 } 1506 /* 'Equipment Check' */ 1507 if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) { 1508 erp_filled = dasd_3990_erp_equip_check(erp, sense); 1509 } 1510 /* 'Data Check' */ 1511 if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) { 1512 erp_filled = dasd_3990_erp_data_check(erp, sense); 1513 } 1514 /* 'Overrun' */ 1515 if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) { 1516 erp_filled = dasd_3990_erp_overrun(erp, sense); 1517 } 1518 /* 'Invalid Track Format' */ 1519 if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) { 1520 erp_filled = dasd_3990_erp_inv_format(erp, sense); 1521 } 1522 /* 'End-of-Cylinder' */ 1523 if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) { 1524 erp_filled = dasd_3990_erp_EOC(erp, sense); 1525 } 1526 /* 'Environmental Data' */ 1527 if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) { 1528 erp_filled = dasd_3990_erp_env_data(erp, sense); 1529 } 1530 /* 'No Record Found' */ 1531 if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) { 1532 erp_filled = dasd_3990_erp_no_rec(erp, sense); 1533 } 1534 /* 'File Protected' */ 1535 if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) { 1536 erp_filled = dasd_3990_erp_file_prot(erp); 1537 } 1538 /* other (unknown) error - do default ERP */ 1539 if (erp_filled == NULL) { 1540 1541 erp_filled = erp; 1542 } 1543 1544 return erp_filled; 1545 1546 } /* END dasd_3990_erp_inspect_24 */ 1547 1548 /* 1549 ***************************************************************************** 1550 * 32 byte sense ERP functions (only) 1551 ***************************************************************************** 1552 */ 1553 1554 /* 1555 * DASD_3990_ERPACTION_10_32 1556 * 1557 * DESCRIPTION 1558 * Handles 32 byte 'Action 10' of Single Program Action Codes. 1559 * Just retry and if retry doesn't work, return with error. 1560 * 1561 * PARAMETER 1562 * erp current erp_head 1563 * sense current sense data 1564 * RETURN VALUES 1565 * erp modified erp_head 1566 */ 1567 static struct dasd_ccw_req * 1568 dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense) 1569 { 1570 1571 struct dasd_device *device = erp->startdev; 1572 1573 erp->retries = 256; 1574 erp->function = dasd_3990_erp_action_10_32; 1575 1576 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Perform logging requested"); 1577 1578 return erp; 1579 1580 } /* end dasd_3990_erp_action_10_32 */ 1581 1582 /* 1583 * DASD_3990_ERP_ACTION_1B_32 1584 * 1585 * DESCRIPTION 1586 * Handles 32 byte 'Action 1B' of Single Program Action Codes. 1587 * A write operation could not be finished because of an unexpected 1588 * condition. 1589 * The already created 'default erp' is used to get the link to 1590 * the erp chain, but it can not be used for this recovery 1591 * action because it contains no DE/LO data space. 1592 * 1593 * PARAMETER 1594 * default_erp already added default erp. 1595 * sense current sense data 1596 * 1597 * RETURN VALUES 1598 * erp new erp or 1599 * default_erp in case of imprecise ending or error 1600 */ 1601 static struct dasd_ccw_req * 1602 dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) 1603 { 1604 1605 struct dasd_device *device = default_erp->startdev; 1606 __u32 cpa = 0; 1607 struct dasd_ccw_req *cqr; 1608 struct dasd_ccw_req *erp; 1609 struct DE_eckd_data *DE_data; 1610 struct PFX_eckd_data *PFX_data; 1611 char *LO_data; /* LO_eckd_data_t */ 1612 struct ccw1 *ccw, *oldccw; 1613 1614 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1615 "Write not finished because of unexpected condition"); 1616 1617 default_erp->function = dasd_3990_erp_action_1B_32; 1618 1619 /* determine the original cqr */ 1620 cqr = default_erp; 1621 1622 while (cqr->refers != NULL) { 1623 cqr = cqr->refers; 1624 } 1625 1626 if (scsw_is_tm(&cqr->irb.scsw)) { 1627 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1628 "32 bit sense, action 1B is not defined" 1629 " in transport mode - just retry"); 1630 return default_erp; 1631 } 1632 1633 /* for imprecise ending just do default erp */ 1634 if (sense[1] & 0x01) { 1635 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1636 "Imprecise ending is set - just retry"); 1637 1638 return default_erp; 1639 } 1640 1641 /* determine the address of the CCW to be restarted */ 1642 /* Imprecise ending is not set -> addr from IRB-SCSW */ 1643 cpa = default_erp->refers->irb.scsw.cmd.cpa; 1644 1645 if (cpa == 0) { 1646 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1647 "Unable to determine address of the CCW " 1648 "to be restarted"); 1649 1650 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1651 } 1652 1653 /* Build new ERP request including DE/LO */ 1654 erp = dasd_alloc_erp_request(cqr->magic, 1655 2 + 1,/* DE/LO + TIC */ 1656 sizeof(struct DE_eckd_data) + 1657 sizeof(struct LO_eckd_data), device); 1658 1659 if (IS_ERR(erp)) { 1660 /* internal error 01 - Unable to allocate ERP */ 1661 dev_err(&device->cdev->dev, "An error occurred in the DASD " 1662 "device driver, reason=%s\n", "01"); 1663 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1664 } 1665 1666 /* use original DE */ 1667 DE_data = erp->data; 1668 oldccw = cqr->cpaddr; 1669 if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) { 1670 PFX_data = cqr->data; 1671 memcpy(DE_data, &PFX_data->define_extent, 1672 sizeof(struct DE_eckd_data)); 1673 } else 1674 memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data)); 1675 1676 /* create LO */ 1677 LO_data = erp->data + sizeof(struct DE_eckd_data); 1678 1679 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { 1680 /* should not */ 1681 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1682 } 1683 1684 if ((sense[7] & 0x3F) == 0x01) { 1685 /* operation code is WRITE DATA -> data area orientation */ 1686 LO_data[0] = 0x81; 1687 1688 } else if ((sense[7] & 0x3F) == 0x03) { 1689 /* operation code is FORMAT WRITE -> index orientation */ 1690 LO_data[0] = 0xC3; 1691 1692 } else { 1693 LO_data[0] = sense[7]; /* operation */ 1694 } 1695 1696 LO_data[1] = sense[8]; /* auxiliary */ 1697 LO_data[2] = sense[9]; 1698 LO_data[3] = sense[3]; /* count */ 1699 LO_data[4] = sense[29]; /* seek_addr.cyl */ 1700 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */ 1701 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */ 1702 1703 memcpy(&(LO_data[8]), &(sense[11]), 8); 1704 1705 /* create DE ccw */ 1706 ccw = erp->cpaddr; 1707 memset(ccw, 0, sizeof(struct ccw1)); 1708 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 1709 ccw->flags = CCW_FLAG_CC; 1710 ccw->count = 16; 1711 ccw->cda = (__u32)virt_to_phys(DE_data); 1712 1713 /* create LO ccw */ 1714 ccw++; 1715 memset(ccw, 0, sizeof(struct ccw1)); 1716 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 1717 ccw->flags = CCW_FLAG_CC; 1718 ccw->count = 16; 1719 ccw->cda = (__u32)virt_to_phys(LO_data); 1720 1721 /* TIC to the failed ccw */ 1722 ccw++; 1723 ccw->cmd_code = CCW_CMD_TIC; 1724 ccw->cda = cpa; 1725 1726 /* fill erp related fields */ 1727 erp->flags = default_erp->flags; 1728 erp->function = dasd_3990_erp_action_1B_32; 1729 erp->refers = default_erp->refers; 1730 erp->startdev = device; 1731 erp->memdev = device; 1732 erp->magic = default_erp->magic; 1733 erp->expires = default_erp->expires; 1734 erp->retries = 256; 1735 erp->buildclk = get_tod_clock(); 1736 erp->status = DASD_CQR_FILLED; 1737 1738 /* remove the default erp */ 1739 dasd_free_erp_request(default_erp, device); 1740 1741 return erp; 1742 1743 } /* end dasd_3990_erp_action_1B_32 */ 1744 1745 /* 1746 * DASD_3990_UPDATE_1B 1747 * 1748 * DESCRIPTION 1749 * Handles the update to the 32 byte 'Action 1B' of Single Program 1750 * Action Codes in case the first action was not successful. 1751 * The already created 'previous_erp' is the currently not successful 1752 * ERP. 1753 * 1754 * PARAMETER 1755 * previous_erp already created previous erp. 1756 * sense current sense data 1757 * RETURN VALUES 1758 * erp modified erp 1759 */ 1760 static struct dasd_ccw_req * 1761 dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense) 1762 { 1763 1764 struct dasd_device *device = previous_erp->startdev; 1765 __u32 cpa = 0; 1766 struct dasd_ccw_req *cqr; 1767 struct dasd_ccw_req *erp; 1768 char *LO_data; /* struct LO_eckd_data */ 1769 struct ccw1 *ccw; 1770 1771 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1772 "Write not finished because of unexpected condition" 1773 " - follow on"); 1774 1775 /* determine the original cqr */ 1776 cqr = previous_erp; 1777 1778 while (cqr->refers != NULL) { 1779 cqr = cqr->refers; 1780 } 1781 1782 if (scsw_is_tm(&cqr->irb.scsw)) { 1783 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1784 "32 bit sense, action 1B, update," 1785 " in transport mode - just retry"); 1786 return previous_erp; 1787 } 1788 1789 /* for imprecise ending just do default erp */ 1790 if (sense[1] & 0x01) { 1791 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1792 "Imprecise ending is set - just retry"); 1793 1794 previous_erp->status = DASD_CQR_FILLED; 1795 1796 return previous_erp; 1797 } 1798 1799 /* determine the address of the CCW to be restarted */ 1800 /* Imprecise ending is not set -> addr from IRB-SCSW */ 1801 cpa = previous_erp->irb.scsw.cmd.cpa; 1802 1803 if (cpa == 0) { 1804 /* internal error 02 - 1805 Unable to determine address of the CCW to be restarted */ 1806 dev_err(&device->cdev->dev, "An error occurred in the DASD " 1807 "device driver, reason=%s\n", "02"); 1808 1809 previous_erp->status = DASD_CQR_FAILED; 1810 1811 return previous_erp; 1812 } 1813 1814 erp = previous_erp; 1815 1816 /* update the LO with the new returned sense data */ 1817 LO_data = erp->data + sizeof(struct DE_eckd_data); 1818 1819 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { 1820 /* should not happen */ 1821 previous_erp->status = DASD_CQR_FAILED; 1822 1823 return previous_erp; 1824 } 1825 1826 if ((sense[7] & 0x3F) == 0x01) { 1827 /* operation code is WRITE DATA -> data area orientation */ 1828 LO_data[0] = 0x81; 1829 1830 } else if ((sense[7] & 0x3F) == 0x03) { 1831 /* operation code is FORMAT WRITE -> index orientation */ 1832 LO_data[0] = 0xC3; 1833 1834 } else { 1835 LO_data[0] = sense[7]; /* operation */ 1836 } 1837 1838 LO_data[1] = sense[8]; /* auxiliary */ 1839 LO_data[2] = sense[9]; 1840 LO_data[3] = sense[3]; /* count */ 1841 LO_data[4] = sense[29]; /* seek_addr.cyl */ 1842 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */ 1843 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */ 1844 1845 memcpy(&(LO_data[8]), &(sense[11]), 8); 1846 1847 /* TIC to the failed ccw */ 1848 ccw = erp->cpaddr; /* addr of DE ccw */ 1849 ccw++; /* addr of LE ccw */ 1850 ccw++; /* addr of TIC ccw */ 1851 ccw->cda = cpa; 1852 1853 erp->status = DASD_CQR_FILLED; 1854 1855 return erp; 1856 1857 } /* end dasd_3990_update_1B */ 1858 1859 /* 1860 * DASD_3990_ERP_COMPOUND_RETRY 1861 * 1862 * DESCRIPTION 1863 * Handles the compound ERP action retry code. 1864 * NOTE: At least one retry is done even if zero is specified 1865 * by the sense data. This makes enqueueing of the request 1866 * easier. 1867 * 1868 * PARAMETER 1869 * sense sense data of the actual error 1870 * erp pointer to the currently created ERP 1871 * 1872 * RETURN VALUES 1873 * erp modified ERP pointer 1874 * 1875 */ 1876 static void 1877 dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense) 1878 { 1879 1880 switch (sense[25] & 0x03) { 1881 case 0x00: /* no not retry */ 1882 erp->retries = 1; 1883 break; 1884 1885 case 0x01: /* retry 2 times */ 1886 erp->retries = 2; 1887 break; 1888 1889 case 0x02: /* retry 10 times */ 1890 erp->retries = 10; 1891 break; 1892 1893 case 0x03: /* retry 256 times */ 1894 erp->retries = 256; 1895 break; 1896 1897 default: 1898 BUG(); 1899 } 1900 1901 erp->function = dasd_3990_erp_compound_retry; 1902 1903 } /* end dasd_3990_erp_compound_retry */ 1904 1905 /* 1906 * DASD_3990_ERP_COMPOUND_PATH 1907 * 1908 * DESCRIPTION 1909 * Handles the compound ERP action for retry on alternate 1910 * channel path. 1911 * 1912 * PARAMETER 1913 * sense sense data of the actual error 1914 * erp pointer to the currently created ERP 1915 * 1916 * RETURN VALUES 1917 * erp modified ERP pointer 1918 * 1919 */ 1920 static void 1921 dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense) 1922 { 1923 if (sense[25] & DASD_SENSE_BIT_3) { 1924 dasd_3990_erp_alternate_path(erp); 1925 1926 if (erp->status == DASD_CQR_FAILED && 1927 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) { 1928 /* reset the lpm and the status to be able to 1929 * try further actions. */ 1930 erp->lpm = dasd_path_get_opm(erp->startdev); 1931 erp->status = DASD_CQR_NEED_ERP; 1932 } 1933 } 1934 1935 erp->function = dasd_3990_erp_compound_path; 1936 1937 } /* end dasd_3990_erp_compound_path */ 1938 1939 /* 1940 * DASD_3990_ERP_COMPOUND_CODE 1941 * 1942 * DESCRIPTION 1943 * Handles the compound ERP action for retry code. 1944 * 1945 * PARAMETER 1946 * sense sense data of the actual error 1947 * erp pointer to the currently created ERP 1948 * 1949 * RETURN VALUES 1950 * erp NEW ERP pointer 1951 * 1952 */ 1953 static struct dasd_ccw_req * 1954 dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense) 1955 { 1956 1957 if (sense[25] & DASD_SENSE_BIT_2) { 1958 1959 switch (sense[28]) { 1960 case 0x17: 1961 /* issue a Diagnostic Control command with an 1962 * Inhibit Write subcommand and controller modifier */ 1963 erp = dasd_3990_erp_DCTL(erp, 0x20); 1964 break; 1965 1966 case 0x25: 1967 /* wait for 5 seconds and retry again */ 1968 erp->retries = 1; 1969 1970 dasd_3990_erp_block_queue (erp, 5*HZ); 1971 break; 1972 1973 default: 1974 /* should not happen - continue */ 1975 break; 1976 } 1977 } 1978 1979 erp->function = dasd_3990_erp_compound_code; 1980 1981 return erp; 1982 1983 } /* end dasd_3990_erp_compound_code */ 1984 1985 /* 1986 * DASD_3990_ERP_COMPOUND_CONFIG 1987 * 1988 * DESCRIPTION 1989 * Handles the compound ERP action for configuration 1990 * dependent error. 1991 * Note: duplex handling is not implemented (yet). 1992 * 1993 * PARAMETER 1994 * sense sense data of the actual error 1995 * erp pointer to the currently created ERP 1996 * 1997 * RETURN VALUES 1998 * erp modified ERP pointer 1999 * 2000 */ 2001 static void 2002 dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense) 2003 { 2004 2005 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) { 2006 2007 /* set to suspended duplex state then restart 2008 internal error 05 - Set device to suspended duplex state 2009 should be done */ 2010 struct dasd_device *device = erp->startdev; 2011 dev_err(&device->cdev->dev, 2012 "An error occurred in the DASD device driver, " 2013 "reason=%s\n", "05"); 2014 2015 } 2016 2017 erp->function = dasd_3990_erp_compound_config; 2018 2019 } /* end dasd_3990_erp_compound_config */ 2020 2021 /* 2022 * DASD_3990_ERP_COMPOUND 2023 * 2024 * DESCRIPTION 2025 * Does the further compound program action if 2026 * compound retry was not successful. 2027 * 2028 * PARAMETER 2029 * sense sense data of the actual error 2030 * erp pointer to the current (failed) ERP 2031 * 2032 * RETURN VALUES 2033 * erp (additional) ERP pointer 2034 * 2035 */ 2036 static struct dasd_ccw_req * 2037 dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense) 2038 { 2039 2040 if ((erp->function == dasd_3990_erp_compound_retry) && 2041 (erp->status == DASD_CQR_NEED_ERP)) { 2042 2043 dasd_3990_erp_compound_path(erp, sense); 2044 } 2045 2046 if ((erp->function == dasd_3990_erp_compound_path) && 2047 (erp->status == DASD_CQR_NEED_ERP)) { 2048 2049 erp = dasd_3990_erp_compound_code(erp, sense); 2050 } 2051 2052 if ((erp->function == dasd_3990_erp_compound_code) && 2053 (erp->status == DASD_CQR_NEED_ERP)) { 2054 2055 dasd_3990_erp_compound_config(erp, sense); 2056 } 2057 2058 /* if no compound action ERP specified, the request failed */ 2059 if (erp->status == DASD_CQR_NEED_ERP) 2060 erp->status = DASD_CQR_FAILED; 2061 2062 return erp; 2063 2064 } /* end dasd_3990_erp_compound */ 2065 2066 /* 2067 *DASD_3990_ERP_HANDLE_SIM 2068 * 2069 *DESCRIPTION 2070 * inspects the SIM SENSE data and starts an appropriate action 2071 * 2072 * PARAMETER 2073 * sense sense data of the actual error 2074 * 2075 * RETURN VALUES 2076 * none 2077 */ 2078 void 2079 dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense) 2080 { 2081 /* print message according to log or message to operator mode */ 2082 if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) { 2083 /* print SIM SRC from RefCode */ 2084 dev_err(&device->cdev->dev, "SIM - SRC: " 2085 "%02x%02x%02x%02x\n", sense[22], 2086 sense[23], sense[11], sense[12]); 2087 } else if (sense[24] & DASD_SIM_LOG) { 2088 /* print SIM SRC Refcode */ 2089 dev_warn(&device->cdev->dev, "log SIM - SRC: " 2090 "%02x%02x%02x%02x\n", sense[22], 2091 sense[23], sense[11], sense[12]); 2092 } 2093 } 2094 2095 /* 2096 * DASD_3990_ERP_INSPECT_32 2097 * 2098 * DESCRIPTION 2099 * Does a detailed inspection of the 32 byte sense data 2100 * and sets up a related error recovery action. 2101 * 2102 * PARAMETER 2103 * sense sense data of the actual error 2104 * erp pointer to the currently created default ERP 2105 * 2106 * RETURN VALUES 2107 * erp_filled pointer to the ERP 2108 * 2109 */ 2110 static struct dasd_ccw_req * 2111 dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense) 2112 { 2113 2114 struct dasd_device *device = erp->startdev; 2115 2116 erp->function = dasd_3990_erp_inspect_32; 2117 2118 /* check for SIM sense data */ 2119 if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE) 2120 dasd_3990_erp_handle_sim(device, sense); 2121 2122 if (sense[25] & DASD_SENSE_BIT_0) { 2123 2124 /* compound program action codes (byte25 bit 0 == '1') */ 2125 dasd_3990_erp_compound_retry(erp, sense); 2126 2127 } else { 2128 2129 /* single program action codes (byte25 bit 0 == '0') */ 2130 switch (sense[25]) { 2131 2132 case 0x00: /* success - use default ERP for retries */ 2133 DBF_DEV_EVENT(DBF_DEBUG, device, "%s", 2134 "ERP called for successful request" 2135 " - just retry"); 2136 break; 2137 2138 case 0x01: /* fatal error */ 2139 dev_err(&device->cdev->dev, 2140 "ERP failed for the DASD\n"); 2141 2142 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2143 break; 2144 2145 case 0x02: /* intervention required */ 2146 case 0x03: /* intervention required during dual copy */ 2147 erp = dasd_3990_erp_int_req(erp); 2148 break; 2149 2150 case 0x0F: /* length mismatch during update write command 2151 internal error 08 - update write command error*/ 2152 dev_err(&device->cdev->dev, "An error occurred in the " 2153 "DASD device driver, reason=%s\n", "08"); 2154 2155 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2156 break; 2157 2158 case 0x10: /* logging required for other channel program */ 2159 erp = dasd_3990_erp_action_10_32(erp, sense); 2160 break; 2161 2162 case 0x15: /* next track outside defined extend 2163 internal error 07 - The next track is not 2164 within the defined storage extent */ 2165 dev_err(&device->cdev->dev, 2166 "An error occurred in the DASD device driver, " 2167 "reason=%s\n", "07"); 2168 2169 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2170 break; 2171 2172 case 0x1B: /* unexpected condition during write */ 2173 2174 erp = dasd_3990_erp_action_1B_32(erp, sense); 2175 break; 2176 2177 case 0x1C: /* invalid data */ 2178 dev_emerg(&device->cdev->dev, 2179 "Data recovered during retry with PCI " 2180 "fetch mode active\n"); 2181 2182 /* not possible to handle this situation in Linux */ 2183 panic 2184 ("Invalid data - No way to inform application " 2185 "about the possibly incorrect data"); 2186 break; 2187 2188 case 0x1D: /* state-change pending */ 2189 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2190 "A State change pending condition exists " 2191 "for the subsystem or device"); 2192 2193 erp = dasd_3990_erp_action_4(erp, sense); 2194 break; 2195 2196 case 0x1E: /* busy */ 2197 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2198 "Busy condition exists " 2199 "for the subsystem or device"); 2200 erp = dasd_3990_erp_action_4(erp, sense); 2201 break; 2202 2203 default: /* all others errors - default erp */ 2204 break; 2205 } 2206 } 2207 2208 return erp; 2209 2210 } /* end dasd_3990_erp_inspect_32 */ 2211 2212 static void dasd_3990_erp_disable_path(struct dasd_device *device, __u8 lpum) 2213 { 2214 int pos = pathmask_to_pos(lpum); 2215 2216 if (!(device->features & DASD_FEATURE_PATH_AUTODISABLE)) { 2217 dev_err(&device->cdev->dev, 2218 "Path %x.%02x (pathmask %02x) is operational despite excessive IFCCs\n", 2219 device->path[pos].cssid, device->path[pos].chpid, lpum); 2220 goto out; 2221 } 2222 2223 /* no remaining path, cannot disable */ 2224 if (!(dasd_path_get_opm(device) & ~lpum)) { 2225 dev_err(&device->cdev->dev, 2226 "Last path %x.%02x (pathmask %02x) is operational despite excessive IFCCs\n", 2227 device->path[pos].cssid, device->path[pos].chpid, lpum); 2228 goto out; 2229 } 2230 2231 dev_err(&device->cdev->dev, 2232 "Path %x.%02x (pathmask %02x) is disabled - IFCC threshold exceeded\n", 2233 device->path[pos].cssid, device->path[pos].chpid, lpum); 2234 dasd_path_remove_opm(device, lpum); 2235 dasd_path_add_ifccpm(device, lpum); 2236 2237 out: 2238 device->path[pos].errorclk = 0; 2239 atomic_set(&device->path[pos].error_count, 0); 2240 } 2241 2242 static void dasd_3990_erp_account_error(struct dasd_ccw_req *erp) 2243 { 2244 struct dasd_device *device = erp->startdev; 2245 __u8 lpum = erp->refers->irb.esw.esw1.lpum; 2246 int pos = pathmask_to_pos(lpum); 2247 unsigned long clk; 2248 2249 if (!device->path_thrhld) 2250 return; 2251 2252 clk = get_tod_clock(); 2253 /* 2254 * check if the last error is longer ago than the timeout, 2255 * if so reset error state 2256 */ 2257 if ((tod_to_ns(clk - device->path[pos].errorclk) / NSEC_PER_SEC) 2258 >= device->path_interval) { 2259 atomic_set(&device->path[pos].error_count, 0); 2260 device->path[pos].errorclk = 0; 2261 } 2262 atomic_inc(&device->path[pos].error_count); 2263 device->path[pos].errorclk = clk; 2264 /* threshold exceeded disable path if possible */ 2265 if (atomic_read(&device->path[pos].error_count) >= 2266 device->path_thrhld) 2267 dasd_3990_erp_disable_path(device, lpum); 2268 } 2269 2270 /* 2271 ***************************************************************************** 2272 * main ERP control functions (24 and 32 byte sense) 2273 ***************************************************************************** 2274 */ 2275 2276 /* 2277 * DASD_3990_ERP_CONTROL_CHECK 2278 * 2279 * DESCRIPTION 2280 * Does a generic inspection if a control check occurred and sets up 2281 * the related error recovery procedure 2282 * 2283 * PARAMETER 2284 * erp pointer to the currently created default ERP 2285 * 2286 * RETURN VALUES 2287 * erp_filled pointer to the erp 2288 */ 2289 2290 static struct dasd_ccw_req * 2291 dasd_3990_erp_control_check(struct dasd_ccw_req *erp) 2292 { 2293 struct dasd_device *device = erp->startdev; 2294 2295 if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK 2296 | SCHN_STAT_CHN_CTRL_CHK)) { 2297 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2298 "channel or interface control check"); 2299 dasd_3990_erp_account_error(erp); 2300 erp = dasd_3990_erp_action_4(erp, NULL); 2301 } 2302 return erp; 2303 } 2304 2305 /* 2306 * DASD_3990_ERP_INSPECT 2307 * 2308 * DESCRIPTION 2309 * Does a detailed inspection for sense data by calling either 2310 * the 24-byte or the 32-byte inspection routine. 2311 * 2312 * PARAMETER 2313 * erp pointer to the currently created default ERP 2314 * RETURN VALUES 2315 * erp_new contens was possibly modified 2316 */ 2317 static struct dasd_ccw_req * 2318 dasd_3990_erp_inspect(struct dasd_ccw_req *erp) 2319 { 2320 2321 struct dasd_ccw_req *erp_new = NULL; 2322 char *sense; 2323 2324 /* if this problem occurred on an alias retry on base */ 2325 erp_new = dasd_3990_erp_inspect_alias(erp); 2326 if (erp_new) 2327 return erp_new; 2328 2329 /* sense data are located in the refers record of the 2330 * already set up new ERP ! 2331 * check if concurrent sens is available 2332 */ 2333 sense = dasd_get_sense(&erp->refers->irb); 2334 if (!sense) 2335 erp_new = dasd_3990_erp_control_check(erp); 2336 /* distinguish between 24 and 32 byte sense data */ 2337 else if (sense[27] & DASD_SENSE_BIT_0) { 2338 2339 /* inspect the 24 byte sense data */ 2340 erp_new = dasd_3990_erp_inspect_24(erp, sense); 2341 2342 } else { 2343 2344 /* inspect the 32 byte sense data */ 2345 erp_new = dasd_3990_erp_inspect_32(erp, sense); 2346 2347 } /* end distinguish between 24 and 32 byte sense data */ 2348 2349 return erp_new; 2350 } 2351 2352 /* 2353 * DASD_3990_ERP_ADD_ERP 2354 * 2355 * DESCRIPTION 2356 * This function adds an additional request block (ERP) to the head of 2357 * the given cqr (or erp). 2358 * For a command mode cqr the erp is initialized as an default erp 2359 * (retry TIC). 2360 * For transport mode we make a copy of the original TCW (points to 2361 * the original TCCB, TIDALs, etc.) but give it a fresh 2362 * TSB so the original sense data will not be changed. 2363 * 2364 * PARAMETER 2365 * cqr head of the current ERP-chain (or single cqr if 2366 * first error) 2367 * RETURN VALUES 2368 * erp pointer to new ERP-chain head 2369 */ 2370 static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr) 2371 { 2372 2373 struct dasd_device *device = cqr->startdev; 2374 struct ccw1 *ccw; 2375 struct dasd_ccw_req *erp; 2376 int cplength, datasize; 2377 struct tcw *tcw; 2378 struct tsb *tsb; 2379 2380 if (cqr->cpmode == 1) { 2381 cplength = 0; 2382 /* TCW needs to be 64 byte aligned, so leave enough room */ 2383 datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb); 2384 } else { 2385 cplength = 2; 2386 datasize = 0; 2387 } 2388 2389 /* allocate additional request block */ 2390 erp = dasd_alloc_erp_request(cqr->magic, 2391 cplength, datasize, device); 2392 if (IS_ERR(erp)) { 2393 if (cqr->retries <= 0) { 2394 DBF_DEV_EVENT(DBF_ERR, device, "%s", 2395 "Unable to allocate ERP request"); 2396 cqr->status = DASD_CQR_FAILED; 2397 cqr->stopclk = get_tod_clock(); 2398 } else { 2399 DBF_DEV_EVENT(DBF_ERR, device, 2400 "Unable to allocate ERP request " 2401 "(%i retries left)", 2402 cqr->retries); 2403 dasd_block_set_timer(device->block, (HZ << 3)); 2404 } 2405 return erp; 2406 } 2407 2408 ccw = cqr->cpaddr; 2409 if (cqr->cpmode == 1) { 2410 /* make a shallow copy of the original tcw but set new tsb */ 2411 erp->cpmode = 1; 2412 erp->cpaddr = PTR_ALIGN(erp->data, 64); 2413 tcw = erp->cpaddr; 2414 tsb = (struct tsb *) &tcw[1]; 2415 *tcw = *((struct tcw *)cqr->cpaddr); 2416 tcw->tsb = virt_to_phys(tsb); 2417 } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) { 2418 /* PSF cannot be chained from NOOP/TIC */ 2419 erp->cpaddr = cqr->cpaddr; 2420 } else { 2421 /* initialize request with default TIC to current ERP/CQR */ 2422 ccw = erp->cpaddr; 2423 ccw->cmd_code = CCW_CMD_NOOP; 2424 ccw->flags = CCW_FLAG_CC; 2425 ccw++; 2426 ccw->cmd_code = CCW_CMD_TIC; 2427 ccw->cda = (__u32)virt_to_phys(cqr->cpaddr); 2428 } 2429 2430 erp->flags = cqr->flags; 2431 erp->function = dasd_3990_erp_add_erp; 2432 erp->refers = cqr; 2433 erp->startdev = device; 2434 erp->memdev = device; 2435 erp->block = cqr->block; 2436 erp->magic = cqr->magic; 2437 erp->expires = cqr->expires; 2438 erp->retries = device->default_retries; 2439 erp->buildclk = get_tod_clock(); 2440 erp->status = DASD_CQR_FILLED; 2441 2442 return erp; 2443 } 2444 2445 /* 2446 * DASD_3990_ERP_ADDITIONAL_ERP 2447 * 2448 * DESCRIPTION 2449 * An additional ERP is needed to handle the current error. 2450 * Add ERP to the head of the ERP-chain containing the ERP processing 2451 * determined based on the sense data. 2452 * 2453 * PARAMETER 2454 * cqr head of the current ERP-chain (or single cqr if 2455 * first error) 2456 * 2457 * RETURN VALUES 2458 * erp pointer to new ERP-chain head 2459 */ 2460 static struct dasd_ccw_req * 2461 dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr) 2462 { 2463 2464 struct dasd_ccw_req *erp = NULL; 2465 2466 /* add erp and initialize with default TIC */ 2467 erp = dasd_3990_erp_add_erp(cqr); 2468 2469 if (IS_ERR(erp)) 2470 return erp; 2471 2472 /* inspect sense, determine specific ERP if possible */ 2473 if (erp != cqr) { 2474 2475 erp = dasd_3990_erp_inspect(erp); 2476 } 2477 2478 return erp; 2479 2480 } /* end dasd_3990_erp_additional_erp */ 2481 2482 /* 2483 * DASD_3990_ERP_ERROR_MATCH 2484 * 2485 * DESCRIPTION 2486 * Check if the device status of the given cqr is the same. 2487 * This means that the failed CCW and the relevant sense data 2488 * must match. 2489 * I don't distinguish between 24 and 32 byte sense because in case of 2490 * 24 byte sense byte 25 and 27 is set as well. 2491 * 2492 * PARAMETER 2493 * cqr1 first cqr, which will be compared with the 2494 * cqr2 second cqr. 2495 * 2496 * RETURN VALUES 2497 * match 'boolean' for match found 2498 * returns 1 if match found, otherwise 0. 2499 */ 2500 static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, 2501 struct dasd_ccw_req *cqr2) 2502 { 2503 char *sense1, *sense2; 2504 2505 if (cqr1->startdev != cqr2->startdev) 2506 return 0; 2507 2508 sense1 = dasd_get_sense(&cqr1->irb); 2509 sense2 = dasd_get_sense(&cqr2->irb); 2510 2511 /* one request has sense data, the other not -> no match, return 0 */ 2512 if (!sense1 != !sense2) 2513 return 0; 2514 /* no sense data in both cases -> check cstat for IFCC */ 2515 if (!sense1 && !sense2) { 2516 if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | 2517 SCHN_STAT_CHN_CTRL_CHK)) == 2518 (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | 2519 SCHN_STAT_CHN_CTRL_CHK))) 2520 return 1; /* match with ifcc*/ 2521 } 2522 /* check sense data; byte 0-2,25,27 */ 2523 if (!(sense1 && sense2 && 2524 (memcmp(sense1, sense2, 3) == 0) && 2525 (sense1[27] == sense2[27]) && 2526 (sense1[25] == sense2[25]))) { 2527 2528 return 0; /* sense doesn't match */ 2529 } 2530 2531 return 1; /* match */ 2532 2533 } /* end dasd_3990_erp_error_match */ 2534 2535 /* 2536 * DASD_3990_ERP_IN_ERP 2537 * 2538 * DESCRIPTION 2539 * check if the current error already happened before. 2540 * quick exit if current cqr is not an ERP (cqr->refers=NULL) 2541 * 2542 * PARAMETER 2543 * cqr failed cqr (either original cqr or already an erp) 2544 * 2545 * RETURN VALUES 2546 * erp erp-pointer to the already defined error 2547 * recovery procedure OR 2548 * NULL if a 'new' error occurred. 2549 */ 2550 static struct dasd_ccw_req * 2551 dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr) 2552 { 2553 2554 struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */ 2555 *erp_match = NULL; /* save erp chain head */ 2556 int match = 0; /* 'boolean' for matching error found */ 2557 2558 if (cqr->refers == NULL) { /* return if not in erp */ 2559 return NULL; 2560 } 2561 2562 /* check the erp/cqr chain for current error */ 2563 do { 2564 match = dasd_3990_erp_error_match(erp_head, cqr->refers); 2565 erp_match = cqr; /* save possible matching erp */ 2566 cqr = cqr->refers; /* check next erp/cqr in queue */ 2567 2568 } while ((cqr->refers != NULL) && (!match)); 2569 2570 if (!match) { 2571 return NULL; /* no match was found */ 2572 } 2573 2574 return erp_match; /* return address of matching erp */ 2575 2576 } /* END dasd_3990_erp_in_erp */ 2577 2578 /* 2579 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense) 2580 * 2581 * DESCRIPTION 2582 * No retry is left for the current ERP. Check what has to be done 2583 * with the ERP. 2584 * - do further defined ERP action or 2585 * - wait for interrupt or 2586 * - exit with permanent error 2587 * 2588 * PARAMETER 2589 * erp ERP which is in progress with no retry left 2590 * 2591 * RETURN VALUES 2592 * erp modified/additional ERP 2593 */ 2594 static struct dasd_ccw_req * 2595 dasd_3990_erp_further_erp(struct dasd_ccw_req *erp) 2596 { 2597 2598 struct dasd_device *device = erp->startdev; 2599 char *sense = dasd_get_sense(&erp->irb); 2600 2601 /* check for 24 byte sense ERP */ 2602 if ((erp->function == dasd_3990_erp_bus_out) || 2603 (erp->function == dasd_3990_erp_action_1) || 2604 (erp->function == dasd_3990_erp_action_4)) { 2605 2606 erp = dasd_3990_erp_action_1(erp); 2607 2608 } else if (erp->function == dasd_3990_erp_action_1_sec) { 2609 erp = dasd_3990_erp_action_1_sec(erp); 2610 } else if (erp->function == dasd_3990_erp_action_5) { 2611 2612 /* retries have not been successful */ 2613 /* prepare erp for retry on different channel path */ 2614 erp = dasd_3990_erp_action_1(erp); 2615 2616 if (sense && !(sense[2] & DASD_SENSE_BIT_0)) { 2617 2618 /* issue a Diagnostic Control command with an 2619 * Inhibit Write subcommand */ 2620 2621 switch (sense[25]) { 2622 case 0x17: 2623 case 0x57:{ /* controller */ 2624 erp = dasd_3990_erp_DCTL(erp, 0x20); 2625 break; 2626 } 2627 case 0x18: 2628 case 0x58:{ /* channel path */ 2629 erp = dasd_3990_erp_DCTL(erp, 0x40); 2630 break; 2631 } 2632 case 0x19: 2633 case 0x59:{ /* storage director */ 2634 erp = dasd_3990_erp_DCTL(erp, 0x80); 2635 break; 2636 } 2637 default: 2638 DBF_DEV_EVENT(DBF_WARNING, device, 2639 "invalid subcommand modifier 0x%x " 2640 "for Diagnostic Control Command", 2641 sense[25]); 2642 } 2643 } 2644 2645 /* check for 32 byte sense ERP */ 2646 } else if (sense && 2647 ((erp->function == dasd_3990_erp_compound_retry) || 2648 (erp->function == dasd_3990_erp_compound_path) || 2649 (erp->function == dasd_3990_erp_compound_code) || 2650 (erp->function == dasd_3990_erp_compound_config))) { 2651 2652 erp = dasd_3990_erp_compound(erp, sense); 2653 2654 } else { 2655 /* 2656 * No retry left and no additional special handling 2657 * necessary 2658 */ 2659 dev_err(&device->cdev->dev, 2660 "ERP %p has run out of retries and failed\n", erp); 2661 2662 erp->status = DASD_CQR_FAILED; 2663 } 2664 2665 return erp; 2666 2667 } /* end dasd_3990_erp_further_erp */ 2668 2669 /* 2670 * DASD_3990_ERP_HANDLE_MATCH_ERP 2671 * 2672 * DESCRIPTION 2673 * An error occurred again and an ERP has been detected which is already 2674 * used to handle this error (e.g. retries). 2675 * All prior ERP's are asumed to be successful and therefore removed 2676 * from queue. 2677 * If retry counter of matching erp is already 0, it is checked if further 2678 * action is needed (besides retry) or if the ERP has failed. 2679 * 2680 * PARAMETER 2681 * erp_head first ERP in ERP-chain 2682 * erp ERP that handles the actual error. 2683 * (matching erp) 2684 * 2685 * RETURN VALUES 2686 * erp modified/additional ERP 2687 */ 2688 static struct dasd_ccw_req * 2689 dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head, 2690 struct dasd_ccw_req *erp) 2691 { 2692 2693 struct dasd_device *device = erp_head->startdev; 2694 struct dasd_ccw_req *erp_done = erp_head; /* finished req */ 2695 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */ 2696 2697 /* loop over successful ERPs and remove them from chanq */ 2698 while (erp_done != erp) { 2699 2700 if (erp_done == NULL) /* end of chain reached */ 2701 panic(PRINTK_HEADER "Programming error in ERP! The " 2702 "original request was lost\n"); 2703 2704 /* remove the request from the device queue */ 2705 list_del(&erp_done->blocklist); 2706 2707 erp_free = erp_done; 2708 erp_done = erp_done->refers; 2709 2710 /* free the finished erp request */ 2711 dasd_free_erp_request(erp_free, erp_free->memdev); 2712 2713 } /* end while */ 2714 2715 if (erp->retries > 0) { 2716 2717 char *sense = dasd_get_sense(&erp->refers->irb); 2718 2719 /* check for special retries */ 2720 if (sense && erp->function == dasd_3990_erp_action_4) { 2721 2722 erp = dasd_3990_erp_action_4(erp, sense); 2723 2724 } else if (sense && 2725 erp->function == dasd_3990_erp_action_1B_32) { 2726 2727 erp = dasd_3990_update_1B(erp, sense); 2728 2729 } else if (sense && erp->function == dasd_3990_erp_int_req) { 2730 2731 erp = dasd_3990_erp_int_req(erp); 2732 2733 } else { 2734 /* simple retry */ 2735 DBF_DEV_EVENT(DBF_DEBUG, device, 2736 "%i retries left for erp %p", 2737 erp->retries, erp); 2738 2739 /* handle the request again... */ 2740 erp->status = DASD_CQR_FILLED; 2741 } 2742 2743 } else { 2744 /* no retry left - check for further necessary action */ 2745 /* if no further actions, handle rest as permanent error */ 2746 erp = dasd_3990_erp_further_erp(erp); 2747 } 2748 2749 return erp; 2750 2751 } /* end dasd_3990_erp_handle_match_erp */ 2752 2753 /* 2754 * DASD_3990_ERP_ACTION 2755 * 2756 * DESCRIPTION 2757 * control routine for 3990 erp actions. 2758 * Has to be called with the queue lock (namely the s390_irq_lock) acquired. 2759 * 2760 * PARAMETER 2761 * cqr failed cqr (either original cqr or already an erp) 2762 * 2763 * RETURN VALUES 2764 * erp erp-pointer to the head of the ERP action chain. 2765 * This means: 2766 * - either a ptr to an additional ERP cqr or 2767 * - the original given cqr (which's status might 2768 * be modified) 2769 */ 2770 struct dasd_ccw_req * 2771 dasd_3990_erp_action(struct dasd_ccw_req * cqr) 2772 { 2773 struct dasd_ccw_req *erp = NULL; 2774 struct dasd_device *device = cqr->startdev; 2775 struct dasd_ccw_req *temp_erp = NULL; 2776 2777 if (device->features & DASD_FEATURE_ERPLOG) { 2778 /* print current erp_chain */ 2779 dev_err(&device->cdev->dev, 2780 "ERP chain at BEGINNING of ERP-ACTION\n"); 2781 for (temp_erp = cqr; 2782 temp_erp != NULL; temp_erp = temp_erp->refers) { 2783 2784 dev_err(&device->cdev->dev, 2785 "ERP %p (%02x) refers to %p\n", 2786 temp_erp, temp_erp->status, 2787 temp_erp->refers); 2788 } 2789 } 2790 2791 /* double-check if current erp/cqr was successful */ 2792 if ((scsw_cstat(&cqr->irb.scsw) == 0x00) && 2793 (scsw_dstat(&cqr->irb.scsw) == 2794 (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) { 2795 2796 DBF_DEV_EVENT(DBF_DEBUG, device, 2797 "ERP called for successful request %p" 2798 " - NO ERP necessary", cqr); 2799 2800 cqr->status = DASD_CQR_DONE; 2801 2802 return cqr; 2803 } 2804 2805 /* check if error happened before */ 2806 erp = dasd_3990_erp_in_erp(cqr); 2807 2808 if (erp == NULL) { 2809 /* no matching erp found - set up erp */ 2810 erp = dasd_3990_erp_additional_erp(cqr); 2811 if (IS_ERR(erp)) 2812 return erp; 2813 } else { 2814 /* matching erp found - set all leading erp's to DONE */ 2815 erp = dasd_3990_erp_handle_match_erp(cqr, erp); 2816 } 2817 2818 2819 /* 2820 * For path verification work we need to stick with the path that was 2821 * originally chosen so that the per path configuration data is 2822 * assigned correctly. 2823 */ 2824 if (test_bit(DASD_CQR_VERIFY_PATH, &erp->flags) && cqr->lpm) { 2825 erp->lpm = cqr->lpm; 2826 } 2827 2828 if (device->features & DASD_FEATURE_ERPLOG) { 2829 /* print current erp_chain */ 2830 dev_err(&device->cdev->dev, 2831 "ERP chain at END of ERP-ACTION\n"); 2832 for (temp_erp = erp; 2833 temp_erp != NULL; temp_erp = temp_erp->refers) { 2834 2835 dev_err(&device->cdev->dev, 2836 "ERP %p (%02x) refers to %p\n", 2837 temp_erp, temp_erp->status, 2838 temp_erp->refers); 2839 } 2840 } 2841 2842 /* enqueue ERP request if it's a new one */ 2843 if (list_empty(&erp->blocklist)) { 2844 cqr->status = DASD_CQR_IN_ERP; 2845 /* add erp request before the cqr */ 2846 list_add_tail(&erp->blocklist, &cqr->blocklist); 2847 } 2848 2849 2850 2851 return erp; 2852 2853 } /* end dasd_3990_erp_action */ 2854