1 /* 2 * Author(s)......: Horst Hummel <Horst.Hummel@de.ibm.com> 3 * Holger Smolinski <Holger.Smolinski@de.ibm.com> 4 * Bugreports.to..: <Linux390@de.ibm.com> 5 * Copyright IBM Corp. 2000, 2001 6 * 7 */ 8 9 #define KMSG_COMPONENT "dasd-eckd" 10 11 #include <linux/timer.h> 12 #include <asm/idals.h> 13 14 #define PRINTK_HEADER "dasd_erp(3990): " 15 16 #include "dasd_int.h" 17 #include "dasd_eckd.h" 18 19 20 struct DCTL_data { 21 unsigned char subcommand; /* e.g Inhibit Write, Enable Write,... */ 22 unsigned char modifier; /* Subcommand modifier */ 23 unsigned short res; /* reserved */ 24 } __attribute__ ((packed)); 25 26 /* 27 ***************************************************************************** 28 * SECTION ERP HANDLING 29 ***************************************************************************** 30 */ 31 /* 32 ***************************************************************************** 33 * 24 and 32 byte sense ERP functions 34 ***************************************************************************** 35 */ 36 37 /* 38 * DASD_3990_ERP_CLEANUP 39 * 40 * DESCRIPTION 41 * Removes the already build but not necessary ERP request and sets 42 * the status of the original cqr / erp to the given (final) status 43 * 44 * PARAMETER 45 * erp request to be blocked 46 * final_status either DASD_CQR_DONE or DASD_CQR_FAILED 47 * 48 * RETURN VALUES 49 * cqr original cqr 50 */ 51 static struct dasd_ccw_req * 52 dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status) 53 { 54 struct dasd_ccw_req *cqr = erp->refers; 55 56 dasd_free_erp_request(erp, erp->memdev); 57 cqr->status = final_status; 58 return cqr; 59 60 } /* end dasd_3990_erp_cleanup */ 61 62 /* 63 * DASD_3990_ERP_BLOCK_QUEUE 64 * 65 * DESCRIPTION 66 * Block the given device request queue to prevent from further 67 * processing until the started timer has expired or an related 68 * interrupt was received. 69 */ 70 static void dasd_3990_erp_block_queue(struct dasd_ccw_req *erp, int expires) 71 { 72 73 struct dasd_device *device = erp->startdev; 74 unsigned long flags; 75 76 DBF_DEV_EVENT(DBF_INFO, device, 77 "blocking request queue for %is", expires/HZ); 78 79 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 80 dasd_device_set_stop_bits(device, DASD_STOPPED_PENDING); 81 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 82 erp->status = DASD_CQR_FILLED; 83 if (erp->block) 84 dasd_block_set_timer(erp->block, expires); 85 else 86 dasd_device_set_timer(device, expires); 87 } 88 89 /* 90 * DASD_3990_ERP_INT_REQ 91 * 92 * DESCRIPTION 93 * Handles 'Intervention Required' error. 94 * This means either device offline or not installed. 95 * 96 * PARAMETER 97 * erp current erp 98 * RETURN VALUES 99 * erp modified erp 100 */ 101 static struct dasd_ccw_req * 102 dasd_3990_erp_int_req(struct dasd_ccw_req * erp) 103 { 104 105 struct dasd_device *device = erp->startdev; 106 107 /* first time set initial retry counter and erp_function */ 108 /* and retry once without blocking queue */ 109 /* (this enables easier enqueing of the cqr) */ 110 if (erp->function != dasd_3990_erp_int_req) { 111 112 erp->retries = 256; 113 erp->function = dasd_3990_erp_int_req; 114 115 } else { 116 117 /* issue a message and wait for 'device ready' interrupt */ 118 dev_err(&device->cdev->dev, 119 "is offline or not installed - " 120 "INTERVENTION REQUIRED!!\n"); 121 122 dasd_3990_erp_block_queue(erp, 60*HZ); 123 } 124 125 return erp; 126 127 } /* end dasd_3990_erp_int_req */ 128 129 /* 130 * DASD_3990_ERP_ALTERNATE_PATH 131 * 132 * DESCRIPTION 133 * Repeat the operation on a different channel path. 134 * If all alternate paths have been tried, the request is posted with a 135 * permanent error. 136 * 137 * PARAMETER 138 * erp pointer to the current ERP 139 * 140 * RETURN VALUES 141 * erp modified pointer to the ERP 142 */ 143 static void 144 dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp) 145 { 146 struct dasd_device *device = erp->startdev; 147 __u8 opm; 148 unsigned long flags; 149 150 /* try alternate valid path */ 151 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 152 opm = ccw_device_get_path_mask(device->cdev); 153 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 154 if (erp->lpm == 0) 155 erp->lpm = device->path_data.opm & 156 ~(erp->irb.esw.esw0.sublog.lpum); 157 else 158 erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum); 159 160 if ((erp->lpm & opm) != 0x00) { 161 162 DBF_DEV_EVENT(DBF_WARNING, device, 163 "try alternate lpm=%x (lpum=%x / opm=%x)", 164 erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm); 165 166 /* reset status to submit the request again... */ 167 erp->status = DASD_CQR_FILLED; 168 erp->retries = 10; 169 } else { 170 dev_err(&device->cdev->dev, 171 "The DASD cannot be reached on any path (lpum=%x" 172 "/opm=%x)\n", erp->irb.esw.esw0.sublog.lpum, opm); 173 174 /* post request with permanent error */ 175 erp->status = DASD_CQR_FAILED; 176 } 177 } /* end dasd_3990_erp_alternate_path */ 178 179 /* 180 * DASD_3990_ERP_DCTL 181 * 182 * DESCRIPTION 183 * Setup cqr to do the Diagnostic Control (DCTL) command with an 184 * Inhibit Write subcommand (0x20) and the given modifier. 185 * 186 * PARAMETER 187 * erp pointer to the current (failed) ERP 188 * modifier subcommand modifier 189 * 190 * RETURN VALUES 191 * dctl_cqr pointer to NEW dctl_cqr 192 * 193 */ 194 static struct dasd_ccw_req * 195 dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier) 196 { 197 198 struct dasd_device *device = erp->startdev; 199 struct DCTL_data *DCTL_data; 200 struct ccw1 *ccw; 201 struct dasd_ccw_req *dctl_cqr; 202 203 dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1, 204 sizeof(struct DCTL_data), 205 device); 206 if (IS_ERR(dctl_cqr)) { 207 dev_err(&device->cdev->dev, 208 "Unable to allocate DCTL-CQR\n"); 209 erp->status = DASD_CQR_FAILED; 210 return erp; 211 } 212 213 DCTL_data = dctl_cqr->data; 214 215 DCTL_data->subcommand = 0x02; /* Inhibit Write */ 216 DCTL_data->modifier = modifier; 217 218 ccw = dctl_cqr->cpaddr; 219 memset(ccw, 0, sizeof(struct ccw1)); 220 ccw->cmd_code = CCW_CMD_DCTL; 221 ccw->count = 4; 222 ccw->cda = (__u32)(addr_t) DCTL_data; 223 dctl_cqr->flags = erp->flags; 224 dctl_cqr->function = dasd_3990_erp_DCTL; 225 dctl_cqr->refers = erp; 226 dctl_cqr->startdev = device; 227 dctl_cqr->memdev = device; 228 dctl_cqr->magic = erp->magic; 229 dctl_cqr->expires = 5 * 60 * HZ; 230 dctl_cqr->retries = 2; 231 232 dctl_cqr->buildclk = get_tod_clock(); 233 234 dctl_cqr->status = DASD_CQR_FILLED; 235 236 return dctl_cqr; 237 238 } /* end dasd_3990_erp_DCTL */ 239 240 /* 241 * DASD_3990_ERP_ACTION_1 242 * 243 * DESCRIPTION 244 * Setup ERP to do the ERP action 1 (see Reference manual). 245 * Repeat the operation on a different channel path. 246 * As deviation from the recommended recovery action, we reset the path mask 247 * after we have tried each path and go through all paths a second time. 248 * This will cover situations where only one path at a time is actually down, 249 * but all paths fail and recover just with the same sequence and timing as 250 * we try to use them (flapping links). 251 * If all alternate paths have been tried twice, the request is posted with 252 * a permanent error. 253 * 254 * PARAMETER 255 * erp pointer to the current ERP 256 * 257 * RETURN VALUES 258 * erp pointer to the ERP 259 * 260 */ 261 static struct dasd_ccw_req *dasd_3990_erp_action_1_sec(struct dasd_ccw_req *erp) 262 { 263 erp->function = dasd_3990_erp_action_1_sec; 264 dasd_3990_erp_alternate_path(erp); 265 return erp; 266 } 267 268 static struct dasd_ccw_req *dasd_3990_erp_action_1(struct dasd_ccw_req *erp) 269 { 270 erp->function = dasd_3990_erp_action_1; 271 dasd_3990_erp_alternate_path(erp); 272 if (erp->status == DASD_CQR_FAILED && 273 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) { 274 erp->status = DASD_CQR_FILLED; 275 erp->retries = 10; 276 erp->lpm = erp->startdev->path_data.opm; 277 erp->function = dasd_3990_erp_action_1_sec; 278 } 279 return erp; 280 } /* end dasd_3990_erp_action_1(b) */ 281 282 /* 283 * DASD_3990_ERP_ACTION_4 284 * 285 * DESCRIPTION 286 * Setup ERP to do the ERP action 4 (see Reference manual). 287 * Set the current request to PENDING to block the CQR queue for that device 288 * until the state change interrupt appears. 289 * Use a timer (20 seconds) to retry the cqr if the interrupt is still 290 * missing. 291 * 292 * PARAMETER 293 * sense sense data of the actual error 294 * erp pointer to the current ERP 295 * 296 * RETURN VALUES 297 * erp pointer to the ERP 298 * 299 */ 300 static struct dasd_ccw_req * 301 dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense) 302 { 303 304 struct dasd_device *device = erp->startdev; 305 306 /* first time set initial retry counter and erp_function */ 307 /* and retry once without waiting for state change pending */ 308 /* interrupt (this enables easier enqueing of the cqr) */ 309 if (erp->function != dasd_3990_erp_action_4) { 310 311 DBF_DEV_EVENT(DBF_INFO, device, "%s", 312 "dasd_3990_erp_action_4: first time retry"); 313 314 erp->retries = 256; 315 erp->function = dasd_3990_erp_action_4; 316 317 } else { 318 if (sense && (sense[25] == 0x1D)) { /* state change pending */ 319 320 DBF_DEV_EVENT(DBF_INFO, device, 321 "waiting for state change pending " 322 "interrupt, %d retries left", 323 erp->retries); 324 325 dasd_3990_erp_block_queue(erp, 30*HZ); 326 327 } else if (sense && (sense[25] == 0x1E)) { /* busy */ 328 DBF_DEV_EVENT(DBF_INFO, device, 329 "busy - redriving request later, " 330 "%d retries left", 331 erp->retries); 332 dasd_3990_erp_block_queue(erp, HZ); 333 } else { 334 /* no state change pending - retry */ 335 DBF_DEV_EVENT(DBF_INFO, device, 336 "redriving request immediately, " 337 "%d retries left", 338 erp->retries); 339 erp->status = DASD_CQR_FILLED; 340 } 341 } 342 343 return erp; 344 345 } /* end dasd_3990_erp_action_4 */ 346 347 /* 348 ***************************************************************************** 349 * 24 byte sense ERP functions (only) 350 ***************************************************************************** 351 */ 352 353 /* 354 * DASD_3990_ERP_ACTION_5 355 * 356 * DESCRIPTION 357 * Setup ERP to do the ERP action 5 (see Reference manual). 358 * NOTE: Further handling is done in xxx_further_erp after the retries. 359 * 360 * PARAMETER 361 * erp pointer to the current ERP 362 * 363 * RETURN VALUES 364 * erp pointer to the ERP 365 * 366 */ 367 static struct dasd_ccw_req * 368 dasd_3990_erp_action_5(struct dasd_ccw_req * erp) 369 { 370 371 /* first of all retry */ 372 erp->retries = 10; 373 erp->function = dasd_3990_erp_action_5; 374 375 return erp; 376 377 } /* end dasd_3990_erp_action_5 */ 378 379 /* 380 * DASD_3990_HANDLE_ENV_DATA 381 * 382 * DESCRIPTION 383 * Handles 24 byte 'Environmental data present'. 384 * Does a analysis of the sense data (message Format) 385 * and prints the error messages. 386 * 387 * PARAMETER 388 * sense current sense data 389 * 390 * RETURN VALUES 391 * void 392 */ 393 static void 394 dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense) 395 { 396 397 struct dasd_device *device = erp->startdev; 398 char msg_format = (sense[7] & 0xF0); 399 char msg_no = (sense[7] & 0x0F); 400 char errorstring[ERRORLENGTH]; 401 402 switch (msg_format) { 403 case 0x00: /* Format 0 - Program or System Checks */ 404 405 if (sense[1] & 0x10) { /* check message to operator bit */ 406 407 switch (msg_no) { 408 case 0x00: /* No Message */ 409 break; 410 case 0x01: 411 dev_warn(&device->cdev->dev, 412 "FORMAT 0 - Invalid Command\n"); 413 break; 414 case 0x02: 415 dev_warn(&device->cdev->dev, 416 "FORMAT 0 - Invalid Command " 417 "Sequence\n"); 418 break; 419 case 0x03: 420 dev_warn(&device->cdev->dev, 421 "FORMAT 0 - CCW Count less than " 422 "required\n"); 423 break; 424 case 0x04: 425 dev_warn(&device->cdev->dev, 426 "FORMAT 0 - Invalid Parameter\n"); 427 break; 428 case 0x05: 429 dev_warn(&device->cdev->dev, 430 "FORMAT 0 - Diagnostic of Special" 431 " Command Violates File Mask\n"); 432 break; 433 case 0x07: 434 dev_warn(&device->cdev->dev, 435 "FORMAT 0 - Channel Returned with " 436 "Incorrect retry CCW\n"); 437 break; 438 case 0x08: 439 dev_warn(&device->cdev->dev, 440 "FORMAT 0 - Reset Notification\n"); 441 break; 442 case 0x09: 443 dev_warn(&device->cdev->dev, 444 "FORMAT 0 - Storage Path Restart\n"); 445 break; 446 case 0x0A: 447 dev_warn(&device->cdev->dev, 448 "FORMAT 0 - Channel requested " 449 "... %02x\n", sense[8]); 450 break; 451 case 0x0B: 452 dev_warn(&device->cdev->dev, 453 "FORMAT 0 - Invalid Defective/" 454 "Alternate Track Pointer\n"); 455 break; 456 case 0x0C: 457 dev_warn(&device->cdev->dev, 458 "FORMAT 0 - DPS Installation " 459 "Check\n"); 460 break; 461 case 0x0E: 462 dev_warn(&device->cdev->dev, 463 "FORMAT 0 - Command Invalid on " 464 "Secondary Address\n"); 465 break; 466 case 0x0F: 467 dev_warn(&device->cdev->dev, 468 "FORMAT 0 - Status Not As " 469 "Required: reason %02x\n", 470 sense[8]); 471 break; 472 default: 473 dev_warn(&device->cdev->dev, 474 "FORMAT 0 - Reserved\n"); 475 } 476 } else { 477 switch (msg_no) { 478 case 0x00: /* No Message */ 479 break; 480 case 0x01: 481 dev_warn(&device->cdev->dev, 482 "FORMAT 0 - Device Error " 483 "Source\n"); 484 break; 485 case 0x02: 486 dev_warn(&device->cdev->dev, 487 "FORMAT 0 - Reserved\n"); 488 break; 489 case 0x03: 490 dev_warn(&device->cdev->dev, 491 "FORMAT 0 - Device Fenced - " 492 "device = %02x\n", sense[4]); 493 break; 494 case 0x04: 495 dev_warn(&device->cdev->dev, 496 "FORMAT 0 - Data Pinned for " 497 "Device\n"); 498 break; 499 default: 500 dev_warn(&device->cdev->dev, 501 "FORMAT 0 - Reserved\n"); 502 } 503 } 504 break; 505 506 case 0x10: /* Format 1 - Device Equipment Checks */ 507 switch (msg_no) { 508 case 0x00: /* No Message */ 509 break; 510 case 0x01: 511 dev_warn(&device->cdev->dev, 512 "FORMAT 1 - Device Status 1 not as " 513 "expected\n"); 514 break; 515 case 0x03: 516 dev_warn(&device->cdev->dev, 517 "FORMAT 1 - Index missing\n"); 518 break; 519 case 0x04: 520 dev_warn(&device->cdev->dev, 521 "FORMAT 1 - Interruption cannot be " 522 "reset\n"); 523 break; 524 case 0x05: 525 dev_warn(&device->cdev->dev, 526 "FORMAT 1 - Device did not respond to " 527 "selection\n"); 528 break; 529 case 0x06: 530 dev_warn(&device->cdev->dev, 531 "FORMAT 1 - Device check-2 error or Set " 532 "Sector is not complete\n"); 533 break; 534 case 0x07: 535 dev_warn(&device->cdev->dev, 536 "FORMAT 1 - Head address does not " 537 "compare\n"); 538 break; 539 case 0x08: 540 dev_warn(&device->cdev->dev, 541 "FORMAT 1 - Device status 1 not valid\n"); 542 break; 543 case 0x09: 544 dev_warn(&device->cdev->dev, 545 "FORMAT 1 - Device not ready\n"); 546 break; 547 case 0x0A: 548 dev_warn(&device->cdev->dev, 549 "FORMAT 1 - Track physical address did " 550 "not compare\n"); 551 break; 552 case 0x0B: 553 dev_warn(&device->cdev->dev, 554 "FORMAT 1 - Missing device address bit\n"); 555 break; 556 case 0x0C: 557 dev_warn(&device->cdev->dev, 558 "FORMAT 1 - Drive motor switch is off\n"); 559 break; 560 case 0x0D: 561 dev_warn(&device->cdev->dev, 562 "FORMAT 1 - Seek incomplete\n"); 563 break; 564 case 0x0E: 565 dev_warn(&device->cdev->dev, 566 "FORMAT 1 - Cylinder address did not " 567 "compare\n"); 568 break; 569 case 0x0F: 570 dev_warn(&device->cdev->dev, 571 "FORMAT 1 - Offset active cannot be " 572 "reset\n"); 573 break; 574 default: 575 dev_warn(&device->cdev->dev, 576 "FORMAT 1 - Reserved\n"); 577 } 578 break; 579 580 case 0x20: /* Format 2 - 3990 Equipment Checks */ 581 switch (msg_no) { 582 case 0x08: 583 dev_warn(&device->cdev->dev, 584 "FORMAT 2 - 3990 check-2 error\n"); 585 break; 586 case 0x0E: 587 dev_warn(&device->cdev->dev, 588 "FORMAT 2 - Support facility errors\n"); 589 break; 590 case 0x0F: 591 dev_warn(&device->cdev->dev, 592 "FORMAT 2 - Microcode detected error " 593 "%02x\n", 594 sense[8]); 595 break; 596 default: 597 dev_warn(&device->cdev->dev, 598 "FORMAT 2 - Reserved\n"); 599 } 600 break; 601 602 case 0x30: /* Format 3 - 3990 Control Checks */ 603 switch (msg_no) { 604 case 0x0F: 605 dev_warn(&device->cdev->dev, 606 "FORMAT 3 - Allegiance terminated\n"); 607 break; 608 default: 609 dev_warn(&device->cdev->dev, 610 "FORMAT 3 - Reserved\n"); 611 } 612 break; 613 614 case 0x40: /* Format 4 - Data Checks */ 615 switch (msg_no) { 616 case 0x00: 617 dev_warn(&device->cdev->dev, 618 "FORMAT 4 - Home address area error\n"); 619 break; 620 case 0x01: 621 dev_warn(&device->cdev->dev, 622 "FORMAT 4 - Count area error\n"); 623 break; 624 case 0x02: 625 dev_warn(&device->cdev->dev, 626 "FORMAT 4 - Key area error\n"); 627 break; 628 case 0x03: 629 dev_warn(&device->cdev->dev, 630 "FORMAT 4 - Data area error\n"); 631 break; 632 case 0x04: 633 dev_warn(&device->cdev->dev, 634 "FORMAT 4 - No sync byte in home address " 635 "area\n"); 636 break; 637 case 0x05: 638 dev_warn(&device->cdev->dev, 639 "FORMAT 4 - No sync byte in count address " 640 "area\n"); 641 break; 642 case 0x06: 643 dev_warn(&device->cdev->dev, 644 "FORMAT 4 - No sync byte in key area\n"); 645 break; 646 case 0x07: 647 dev_warn(&device->cdev->dev, 648 "FORMAT 4 - No sync byte in data area\n"); 649 break; 650 case 0x08: 651 dev_warn(&device->cdev->dev, 652 "FORMAT 4 - Home address area error; " 653 "offset active\n"); 654 break; 655 case 0x09: 656 dev_warn(&device->cdev->dev, 657 "FORMAT 4 - Count area error; offset " 658 "active\n"); 659 break; 660 case 0x0A: 661 dev_warn(&device->cdev->dev, 662 "FORMAT 4 - Key area error; offset " 663 "active\n"); 664 break; 665 case 0x0B: 666 dev_warn(&device->cdev->dev, 667 "FORMAT 4 - Data area error; " 668 "offset active\n"); 669 break; 670 case 0x0C: 671 dev_warn(&device->cdev->dev, 672 "FORMAT 4 - No sync byte in home " 673 "address area; offset active\n"); 674 break; 675 case 0x0D: 676 dev_warn(&device->cdev->dev, 677 "FORMAT 4 - No syn byte in count " 678 "address area; offset active\n"); 679 break; 680 case 0x0E: 681 dev_warn(&device->cdev->dev, 682 "FORMAT 4 - No sync byte in key area; " 683 "offset active\n"); 684 break; 685 case 0x0F: 686 dev_warn(&device->cdev->dev, 687 "FORMAT 4 - No syn byte in data area; " 688 "offset active\n"); 689 break; 690 default: 691 dev_warn(&device->cdev->dev, 692 "FORMAT 4 - Reserved\n"); 693 } 694 break; 695 696 case 0x50: /* Format 5 - Data Check with displacement information */ 697 switch (msg_no) { 698 case 0x00: 699 dev_warn(&device->cdev->dev, 700 "FORMAT 5 - Data Check in the " 701 "home address area\n"); 702 break; 703 case 0x01: 704 dev_warn(&device->cdev->dev, 705 "FORMAT 5 - Data Check in the count " 706 "area\n"); 707 break; 708 case 0x02: 709 dev_warn(&device->cdev->dev, 710 "FORMAT 5 - Data Check in the key area\n"); 711 break; 712 case 0x03: 713 dev_warn(&device->cdev->dev, 714 "FORMAT 5 - Data Check in the data " 715 "area\n"); 716 break; 717 case 0x08: 718 dev_warn(&device->cdev->dev, 719 "FORMAT 5 - Data Check in the " 720 "home address area; offset active\n"); 721 break; 722 case 0x09: 723 dev_warn(&device->cdev->dev, 724 "FORMAT 5 - Data Check in the count area; " 725 "offset active\n"); 726 break; 727 case 0x0A: 728 dev_warn(&device->cdev->dev, 729 "FORMAT 5 - Data Check in the key area; " 730 "offset active\n"); 731 break; 732 case 0x0B: 733 dev_warn(&device->cdev->dev, 734 "FORMAT 5 - Data Check in the data area; " 735 "offset active\n"); 736 break; 737 default: 738 dev_warn(&device->cdev->dev, 739 "FORMAT 5 - Reserved\n"); 740 } 741 break; 742 743 case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */ 744 switch (msg_no) { 745 case 0x00: 746 dev_warn(&device->cdev->dev, 747 "FORMAT 6 - Overrun on channel A\n"); 748 break; 749 case 0x01: 750 dev_warn(&device->cdev->dev, 751 "FORMAT 6 - Overrun on channel B\n"); 752 break; 753 case 0x02: 754 dev_warn(&device->cdev->dev, 755 "FORMAT 6 - Overrun on channel C\n"); 756 break; 757 case 0x03: 758 dev_warn(&device->cdev->dev, 759 "FORMAT 6 - Overrun on channel D\n"); 760 break; 761 case 0x04: 762 dev_warn(&device->cdev->dev, 763 "FORMAT 6 - Overrun on channel E\n"); 764 break; 765 case 0x05: 766 dev_warn(&device->cdev->dev, 767 "FORMAT 6 - Overrun on channel F\n"); 768 break; 769 case 0x06: 770 dev_warn(&device->cdev->dev, 771 "FORMAT 6 - Overrun on channel G\n"); 772 break; 773 case 0x07: 774 dev_warn(&device->cdev->dev, 775 "FORMAT 6 - Overrun on channel H\n"); 776 break; 777 default: 778 dev_warn(&device->cdev->dev, 779 "FORMAT 6 - Reserved\n"); 780 } 781 break; 782 783 case 0x70: /* Format 7 - Device Connection Control Checks */ 784 switch (msg_no) { 785 case 0x00: 786 dev_warn(&device->cdev->dev, 787 "FORMAT 7 - RCC initiated by a connection " 788 "check alert\n"); 789 break; 790 case 0x01: 791 dev_warn(&device->cdev->dev, 792 "FORMAT 7 - RCC 1 sequence not " 793 "successful\n"); 794 break; 795 case 0x02: 796 dev_warn(&device->cdev->dev, 797 "FORMAT 7 - RCC 1 and RCC 2 sequences not " 798 "successful\n"); 799 break; 800 case 0x03: 801 dev_warn(&device->cdev->dev, 802 "FORMAT 7 - Invalid tag-in during " 803 "selection sequence\n"); 804 break; 805 case 0x04: 806 dev_warn(&device->cdev->dev, 807 "FORMAT 7 - extra RCC required\n"); 808 break; 809 case 0x05: 810 dev_warn(&device->cdev->dev, 811 "FORMAT 7 - Invalid DCC selection " 812 "response or timeout\n"); 813 break; 814 case 0x06: 815 dev_warn(&device->cdev->dev, 816 "FORMAT 7 - Missing end operation; device " 817 "transfer complete\n"); 818 break; 819 case 0x07: 820 dev_warn(&device->cdev->dev, 821 "FORMAT 7 - Missing end operation; device " 822 "transfer incomplete\n"); 823 break; 824 case 0x08: 825 dev_warn(&device->cdev->dev, 826 "FORMAT 7 - Invalid tag-in for an " 827 "immediate command sequence\n"); 828 break; 829 case 0x09: 830 dev_warn(&device->cdev->dev, 831 "FORMAT 7 - Invalid tag-in for an " 832 "extended command sequence\n"); 833 break; 834 case 0x0A: 835 dev_warn(&device->cdev->dev, 836 "FORMAT 7 - 3990 microcode time out when " 837 "stopping selection\n"); 838 break; 839 case 0x0B: 840 dev_warn(&device->cdev->dev, 841 "FORMAT 7 - No response to selection " 842 "after a poll interruption\n"); 843 break; 844 case 0x0C: 845 dev_warn(&device->cdev->dev, 846 "FORMAT 7 - Permanent path error (DASD " 847 "controller not available)\n"); 848 break; 849 case 0x0D: 850 dev_warn(&device->cdev->dev, 851 "FORMAT 7 - DASD controller not available" 852 " on disconnected command chain\n"); 853 break; 854 default: 855 dev_warn(&device->cdev->dev, 856 "FORMAT 7 - Reserved\n"); 857 } 858 break; 859 860 case 0x80: /* Format 8 - Additional Device Equipment Checks */ 861 switch (msg_no) { 862 case 0x00: /* No Message */ 863 case 0x01: 864 dev_warn(&device->cdev->dev, 865 "FORMAT 8 - Error correction code " 866 "hardware fault\n"); 867 break; 868 case 0x03: 869 dev_warn(&device->cdev->dev, 870 "FORMAT 8 - Unexpected end operation " 871 "response code\n"); 872 break; 873 case 0x04: 874 dev_warn(&device->cdev->dev, 875 "FORMAT 8 - End operation with transfer " 876 "count not zero\n"); 877 break; 878 case 0x05: 879 dev_warn(&device->cdev->dev, 880 "FORMAT 8 - End operation with transfer " 881 "count zero\n"); 882 break; 883 case 0x06: 884 dev_warn(&device->cdev->dev, 885 "FORMAT 8 - DPS checks after a system " 886 "reset or selective reset\n"); 887 break; 888 case 0x07: 889 dev_warn(&device->cdev->dev, 890 "FORMAT 8 - DPS cannot be filled\n"); 891 break; 892 case 0x08: 893 dev_warn(&device->cdev->dev, 894 "FORMAT 8 - Short busy time-out during " 895 "device selection\n"); 896 break; 897 case 0x09: 898 dev_warn(&device->cdev->dev, 899 "FORMAT 8 - DASD controller failed to " 900 "set or reset the long busy latch\n"); 901 break; 902 case 0x0A: 903 dev_warn(&device->cdev->dev, 904 "FORMAT 8 - No interruption from device " 905 "during a command chain\n"); 906 break; 907 default: 908 dev_warn(&device->cdev->dev, 909 "FORMAT 8 - Reserved\n"); 910 } 911 break; 912 913 case 0x90: /* Format 9 - Device Read, Write, and Seek Checks */ 914 switch (msg_no) { 915 case 0x00: 916 break; /* No Message */ 917 case 0x06: 918 dev_warn(&device->cdev->dev, 919 "FORMAT 9 - Device check-2 error\n"); 920 break; 921 case 0x07: 922 dev_warn(&device->cdev->dev, 923 "FORMAT 9 - Head address did not " 924 "compare\n"); 925 break; 926 case 0x0A: 927 dev_warn(&device->cdev->dev, 928 "FORMAT 9 - Track physical address did " 929 "not compare while oriented\n"); 930 break; 931 case 0x0E: 932 dev_warn(&device->cdev->dev, 933 "FORMAT 9 - Cylinder address did not " 934 "compare\n"); 935 break; 936 default: 937 dev_warn(&device->cdev->dev, 938 "FORMAT 9 - Reserved\n"); 939 } 940 break; 941 942 case 0xF0: /* Format F - Cache Storage Checks */ 943 switch (msg_no) { 944 case 0x00: 945 dev_warn(&device->cdev->dev, 946 "FORMAT F - Operation Terminated\n"); 947 break; 948 case 0x01: 949 dev_warn(&device->cdev->dev, 950 "FORMAT F - Subsystem Processing Error\n"); 951 break; 952 case 0x02: 953 dev_warn(&device->cdev->dev, 954 "FORMAT F - Cache or nonvolatile storage " 955 "equipment failure\n"); 956 break; 957 case 0x04: 958 dev_warn(&device->cdev->dev, 959 "FORMAT F - Caching terminated\n"); 960 break; 961 case 0x06: 962 dev_warn(&device->cdev->dev, 963 "FORMAT F - Cache fast write access not " 964 "authorized\n"); 965 break; 966 case 0x07: 967 dev_warn(&device->cdev->dev, 968 "FORMAT F - Track format incorrect\n"); 969 break; 970 case 0x09: 971 dev_warn(&device->cdev->dev, 972 "FORMAT F - Caching reinitiated\n"); 973 break; 974 case 0x0A: 975 dev_warn(&device->cdev->dev, 976 "FORMAT F - Nonvolatile storage " 977 "terminated\n"); 978 break; 979 case 0x0B: 980 dev_warn(&device->cdev->dev, 981 "FORMAT F - Volume is suspended duplex\n"); 982 /* call extended error reporting (EER) */ 983 dasd_eer_write(device, erp->refers, 984 DASD_EER_PPRCSUSPEND); 985 break; 986 case 0x0C: 987 dev_warn(&device->cdev->dev, 988 "FORMAT F - Subsystem status cannot be " 989 "determined\n"); 990 break; 991 case 0x0D: 992 dev_warn(&device->cdev->dev, 993 "FORMAT F - Caching status reset to " 994 "default\n"); 995 break; 996 case 0x0E: 997 dev_warn(&device->cdev->dev, 998 "FORMAT F - DASD Fast Write inhibited\n"); 999 break; 1000 default: 1001 dev_warn(&device->cdev->dev, 1002 "FORMAT D - Reserved\n"); 1003 } 1004 break; 1005 1006 default: /* unknown message format - should not happen 1007 internal error 03 - unknown message format */ 1008 snprintf(errorstring, ERRORLENGTH, "03 %x02", msg_format); 1009 dev_err(&device->cdev->dev, 1010 "An error occurred in the DASD device driver, " 1011 "reason=%s\n", errorstring); 1012 break; 1013 } /* end switch message format */ 1014 1015 } /* end dasd_3990_handle_env_data */ 1016 1017 /* 1018 * DASD_3990_ERP_COM_REJ 1019 * 1020 * DESCRIPTION 1021 * Handles 24 byte 'Command Reject' error. 1022 * 1023 * PARAMETER 1024 * erp current erp_head 1025 * sense current sense data 1026 * 1027 * RETURN VALUES 1028 * erp 'new' erp_head - pointer to new ERP 1029 */ 1030 static struct dasd_ccw_req * 1031 dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense) 1032 { 1033 1034 struct dasd_device *device = erp->startdev; 1035 1036 erp->function = dasd_3990_erp_com_rej; 1037 1038 /* env data present (ACTION 10 - retry should work) */ 1039 if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1040 1041 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1042 "Command Reject - environmental data present"); 1043 1044 dasd_3990_handle_env_data(erp, sense); 1045 1046 erp->retries = 5; 1047 1048 } else if (sense[1] & SNS1_WRITE_INHIBITED) { 1049 dev_err(&device->cdev->dev, "An I/O request was rejected" 1050 " because writing is inhibited\n"); 1051 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1052 } else { 1053 /* fatal error - set status to FAILED 1054 internal error 09 - Command Reject */ 1055 dev_err(&device->cdev->dev, "An error occurred in the DASD " 1056 "device driver, reason=%s\n", "09"); 1057 1058 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1059 } 1060 1061 return erp; 1062 1063 } /* end dasd_3990_erp_com_rej */ 1064 1065 /* 1066 * DASD_3990_ERP_BUS_OUT 1067 * 1068 * DESCRIPTION 1069 * Handles 24 byte 'Bus Out Parity Check' error. 1070 * 1071 * PARAMETER 1072 * erp current erp_head 1073 * RETURN VALUES 1074 * erp new erp_head - pointer to new ERP 1075 */ 1076 static struct dasd_ccw_req * 1077 dasd_3990_erp_bus_out(struct dasd_ccw_req * erp) 1078 { 1079 1080 struct dasd_device *device = erp->startdev; 1081 1082 /* first time set initial retry counter and erp_function */ 1083 /* and retry once without blocking queue */ 1084 /* (this enables easier enqueing of the cqr) */ 1085 if (erp->function != dasd_3990_erp_bus_out) { 1086 erp->retries = 256; 1087 erp->function = dasd_3990_erp_bus_out; 1088 1089 } else { 1090 1091 /* issue a message and wait for 'device ready' interrupt */ 1092 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1093 "bus out parity error or BOPC requested by " 1094 "channel"); 1095 1096 dasd_3990_erp_block_queue(erp, 60*HZ); 1097 1098 } 1099 1100 return erp; 1101 1102 } /* end dasd_3990_erp_bus_out */ 1103 1104 /* 1105 * DASD_3990_ERP_EQUIP_CHECK 1106 * 1107 * DESCRIPTION 1108 * Handles 24 byte 'Equipment Check' error. 1109 * 1110 * PARAMETER 1111 * erp current erp_head 1112 * RETURN VALUES 1113 * erp new erp_head - pointer to new ERP 1114 */ 1115 static struct dasd_ccw_req * 1116 dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense) 1117 { 1118 1119 struct dasd_device *device = erp->startdev; 1120 1121 erp->function = dasd_3990_erp_equip_check; 1122 1123 if (sense[1] & SNS1_WRITE_INHIBITED) { 1124 dev_info(&device->cdev->dev, 1125 "Write inhibited path encountered\n"); 1126 1127 /* vary path offline 1128 internal error 04 - Path should be varied off-line.*/ 1129 dev_err(&device->cdev->dev, "An error occurred in the DASD " 1130 "device driver, reason=%s\n", "04"); 1131 1132 erp = dasd_3990_erp_action_1(erp); 1133 1134 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1135 1136 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1137 "Equipment Check - " "environmental data present"); 1138 1139 dasd_3990_handle_env_data(erp, sense); 1140 1141 erp = dasd_3990_erp_action_4(erp, sense); 1142 1143 } else if (sense[1] & SNS1_PERM_ERR) { 1144 1145 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1146 "Equipment Check - retry exhausted or " 1147 "undesirable"); 1148 1149 erp = dasd_3990_erp_action_1(erp); 1150 1151 } else { 1152 /* all other equipment checks - Action 5 */ 1153 /* rest is done when retries == 0 */ 1154 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1155 "Equipment check or processing error"); 1156 1157 erp = dasd_3990_erp_action_5(erp); 1158 } 1159 return erp; 1160 1161 } /* end dasd_3990_erp_equip_check */ 1162 1163 /* 1164 * DASD_3990_ERP_DATA_CHECK 1165 * 1166 * DESCRIPTION 1167 * Handles 24 byte 'Data Check' error. 1168 * 1169 * PARAMETER 1170 * erp current erp_head 1171 * RETURN VALUES 1172 * erp new erp_head - pointer to new ERP 1173 */ 1174 static struct dasd_ccw_req * 1175 dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense) 1176 { 1177 1178 struct dasd_device *device = erp->startdev; 1179 1180 erp->function = dasd_3990_erp_data_check; 1181 1182 if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */ 1183 1184 /* issue message that the data has been corrected */ 1185 dev_emerg(&device->cdev->dev, 1186 "Data recovered during retry with PCI " 1187 "fetch mode active\n"); 1188 1189 /* not possible to handle this situation in Linux */ 1190 panic("No way to inform application about the possibly " 1191 "incorrect data"); 1192 1193 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1194 1195 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1196 "Uncorrectable data check recovered secondary " 1197 "addr of duplex pair"); 1198 1199 erp = dasd_3990_erp_action_4(erp, sense); 1200 1201 } else if (sense[1] & SNS1_PERM_ERR) { 1202 1203 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1204 "Uncorrectable data check with internal " 1205 "retry exhausted"); 1206 1207 erp = dasd_3990_erp_action_1(erp); 1208 1209 } else { 1210 /* all other data checks */ 1211 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1212 "Uncorrectable data check with retry count " 1213 "exhausted..."); 1214 1215 erp = dasd_3990_erp_action_5(erp); 1216 } 1217 1218 return erp; 1219 1220 } /* end dasd_3990_erp_data_check */ 1221 1222 /* 1223 * DASD_3990_ERP_OVERRUN 1224 * 1225 * DESCRIPTION 1226 * Handles 24 byte 'Overrun' error. 1227 * 1228 * PARAMETER 1229 * erp current erp_head 1230 * RETURN VALUES 1231 * erp new erp_head - pointer to new ERP 1232 */ 1233 static struct dasd_ccw_req * 1234 dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense) 1235 { 1236 1237 struct dasd_device *device = erp->startdev; 1238 1239 erp->function = dasd_3990_erp_overrun; 1240 1241 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1242 "Overrun - service overrun or overrun" 1243 " error requested by channel"); 1244 1245 erp = dasd_3990_erp_action_5(erp); 1246 1247 return erp; 1248 1249 } /* end dasd_3990_erp_overrun */ 1250 1251 /* 1252 * DASD_3990_ERP_INV_FORMAT 1253 * 1254 * DESCRIPTION 1255 * Handles 24 byte 'Invalid Track Format' error. 1256 * 1257 * PARAMETER 1258 * erp current erp_head 1259 * RETURN VALUES 1260 * erp new erp_head - pointer to new ERP 1261 */ 1262 static struct dasd_ccw_req * 1263 dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense) 1264 { 1265 1266 struct dasd_device *device = erp->startdev; 1267 1268 erp->function = dasd_3990_erp_inv_format; 1269 1270 if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1271 1272 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1273 "Track format error when destaging or " 1274 "staging data"); 1275 1276 dasd_3990_handle_env_data(erp, sense); 1277 1278 erp = dasd_3990_erp_action_4(erp, sense); 1279 1280 } else { 1281 /* internal error 06 - The track format is not valid*/ 1282 dev_err(&device->cdev->dev, 1283 "An error occurred in the DASD device driver, " 1284 "reason=%s\n", "06"); 1285 1286 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1287 } 1288 1289 return erp; 1290 1291 } /* end dasd_3990_erp_inv_format */ 1292 1293 /* 1294 * DASD_3990_ERP_EOC 1295 * 1296 * DESCRIPTION 1297 * Handles 24 byte 'End-of-Cylinder' error. 1298 * 1299 * PARAMETER 1300 * erp already added default erp 1301 * RETURN VALUES 1302 * erp pointer to original (failed) cqr. 1303 */ 1304 static struct dasd_ccw_req * 1305 dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense) 1306 { 1307 1308 struct dasd_device *device = default_erp->startdev; 1309 1310 dev_err(&device->cdev->dev, 1311 "The cylinder data for accessing the DASD is inconsistent\n"); 1312 1313 /* implement action 7 - BUG */ 1314 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1315 1316 } /* end dasd_3990_erp_EOC */ 1317 1318 /* 1319 * DASD_3990_ERP_ENV_DATA 1320 * 1321 * DESCRIPTION 1322 * Handles 24 byte 'Environmental-Data Present' error. 1323 * 1324 * PARAMETER 1325 * erp current erp_head 1326 * RETURN VALUES 1327 * erp new erp_head - pointer to new ERP 1328 */ 1329 static struct dasd_ccw_req * 1330 dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense) 1331 { 1332 1333 struct dasd_device *device = erp->startdev; 1334 1335 erp->function = dasd_3990_erp_env_data; 1336 1337 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Environmental data present"); 1338 1339 dasd_3990_handle_env_data(erp, sense); 1340 1341 /* don't retry on disabled interface */ 1342 if (sense[7] != 0x0F) { 1343 erp = dasd_3990_erp_action_4(erp, sense); 1344 } else { 1345 erp->status = DASD_CQR_FILLED; 1346 } 1347 1348 return erp; 1349 1350 } /* end dasd_3990_erp_env_data */ 1351 1352 /* 1353 * DASD_3990_ERP_NO_REC 1354 * 1355 * DESCRIPTION 1356 * Handles 24 byte 'No Record Found' error. 1357 * 1358 * PARAMETER 1359 * erp already added default ERP 1360 * 1361 * RETURN VALUES 1362 * erp new erp_head - pointer to new ERP 1363 */ 1364 static struct dasd_ccw_req * 1365 dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense) 1366 { 1367 1368 struct dasd_device *device = default_erp->startdev; 1369 1370 dev_err(&device->cdev->dev, 1371 "The specified record was not found\n"); 1372 1373 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1374 1375 } /* end dasd_3990_erp_no_rec */ 1376 1377 /* 1378 * DASD_3990_ERP_FILE_PROT 1379 * 1380 * DESCRIPTION 1381 * Handles 24 byte 'File Protected' error. 1382 * Note: Seek related recovery is not implemented because 1383 * wee don't use the seek command yet. 1384 * 1385 * PARAMETER 1386 * erp current erp_head 1387 * RETURN VALUES 1388 * erp new erp_head - pointer to new ERP 1389 */ 1390 static struct dasd_ccw_req * 1391 dasd_3990_erp_file_prot(struct dasd_ccw_req * erp) 1392 { 1393 1394 struct dasd_device *device = erp->startdev; 1395 1396 dev_err(&device->cdev->dev, "Accessing the DASD failed because of " 1397 "a hardware error\n"); 1398 1399 return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1400 1401 } /* end dasd_3990_erp_file_prot */ 1402 1403 /* 1404 * DASD_3990_ERP_INSPECT_ALIAS 1405 * 1406 * DESCRIPTION 1407 * Checks if the original request was started on an alias device. 1408 * If yes, it modifies the original and the erp request so that 1409 * the erp request can be started on a base device. 1410 * 1411 * PARAMETER 1412 * erp pointer to the currently created default ERP 1413 * 1414 * RETURN VALUES 1415 * erp pointer to the modified ERP, or NULL 1416 */ 1417 1418 static struct dasd_ccw_req *dasd_3990_erp_inspect_alias( 1419 struct dasd_ccw_req *erp) 1420 { 1421 struct dasd_ccw_req *cqr = erp->refers; 1422 char *sense; 1423 1424 if (cqr->block && 1425 (cqr->block->base != cqr->startdev)) { 1426 1427 sense = dasd_get_sense(&erp->refers->irb); 1428 /* 1429 * dynamic pav may have changed base alias mapping 1430 */ 1431 if (!test_bit(DASD_FLAG_OFFLINE, &cqr->startdev->flags) && sense 1432 && (sense[0] == 0x10) && (sense[7] == 0x0F) 1433 && (sense[8] == 0x67)) { 1434 /* 1435 * remove device from alias handling to prevent new 1436 * requests from being scheduled on the 1437 * wrong alias device 1438 */ 1439 dasd_alias_remove_device(cqr->startdev); 1440 1441 /* schedule worker to reload device */ 1442 dasd_reload_device(cqr->startdev); 1443 } 1444 1445 if (cqr->startdev->features & DASD_FEATURE_ERPLOG) { 1446 DBF_DEV_EVENT(DBF_ERR, cqr->startdev, 1447 "ERP on alias device for request %p," 1448 " recover on base device %s", cqr, 1449 dev_name(&cqr->block->base->cdev->dev)); 1450 } 1451 dasd_eckd_reset_ccw_to_base_io(cqr); 1452 erp->startdev = cqr->block->base; 1453 erp->function = dasd_3990_erp_inspect_alias; 1454 return erp; 1455 } else 1456 return NULL; 1457 } 1458 1459 1460 /* 1461 * DASD_3990_ERP_INSPECT_24 1462 * 1463 * DESCRIPTION 1464 * Does a detailed inspection of the 24 byte sense data 1465 * and sets up a related error recovery action. 1466 * 1467 * PARAMETER 1468 * sense sense data of the actual error 1469 * erp pointer to the currently created default ERP 1470 * 1471 * RETURN VALUES 1472 * erp pointer to the (addtitional) ERP 1473 */ 1474 static struct dasd_ccw_req * 1475 dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense) 1476 { 1477 1478 struct dasd_ccw_req *erp_filled = NULL; 1479 1480 /* Check sense for .... */ 1481 /* 'Command Reject' */ 1482 if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) { 1483 erp_filled = dasd_3990_erp_com_rej(erp, sense); 1484 } 1485 /* 'Intervention Required' */ 1486 if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) { 1487 erp_filled = dasd_3990_erp_int_req(erp); 1488 } 1489 /* 'Bus Out Parity Check' */ 1490 if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) { 1491 erp_filled = dasd_3990_erp_bus_out(erp); 1492 } 1493 /* 'Equipment Check' */ 1494 if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) { 1495 erp_filled = dasd_3990_erp_equip_check(erp, sense); 1496 } 1497 /* 'Data Check' */ 1498 if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) { 1499 erp_filled = dasd_3990_erp_data_check(erp, sense); 1500 } 1501 /* 'Overrun' */ 1502 if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) { 1503 erp_filled = dasd_3990_erp_overrun(erp, sense); 1504 } 1505 /* 'Invalid Track Format' */ 1506 if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) { 1507 erp_filled = dasd_3990_erp_inv_format(erp, sense); 1508 } 1509 /* 'End-of-Cylinder' */ 1510 if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) { 1511 erp_filled = dasd_3990_erp_EOC(erp, sense); 1512 } 1513 /* 'Environmental Data' */ 1514 if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) { 1515 erp_filled = dasd_3990_erp_env_data(erp, sense); 1516 } 1517 /* 'No Record Found' */ 1518 if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) { 1519 erp_filled = dasd_3990_erp_no_rec(erp, sense); 1520 } 1521 /* 'File Protected' */ 1522 if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) { 1523 erp_filled = dasd_3990_erp_file_prot(erp); 1524 } 1525 /* other (unknown) error - do default ERP */ 1526 if (erp_filled == NULL) { 1527 1528 erp_filled = erp; 1529 } 1530 1531 return erp_filled; 1532 1533 } /* END dasd_3990_erp_inspect_24 */ 1534 1535 /* 1536 ***************************************************************************** 1537 * 32 byte sense ERP functions (only) 1538 ***************************************************************************** 1539 */ 1540 1541 /* 1542 * DASD_3990_ERPACTION_10_32 1543 * 1544 * DESCRIPTION 1545 * Handles 32 byte 'Action 10' of Single Program Action Codes. 1546 * Just retry and if retry doesn't work, return with error. 1547 * 1548 * PARAMETER 1549 * erp current erp_head 1550 * sense current sense data 1551 * RETURN VALUES 1552 * erp modified erp_head 1553 */ 1554 static struct dasd_ccw_req * 1555 dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense) 1556 { 1557 1558 struct dasd_device *device = erp->startdev; 1559 1560 erp->retries = 256; 1561 erp->function = dasd_3990_erp_action_10_32; 1562 1563 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Perform logging requested"); 1564 1565 return erp; 1566 1567 } /* end dasd_3990_erp_action_10_32 */ 1568 1569 /* 1570 * DASD_3990_ERP_ACTION_1B_32 1571 * 1572 * DESCRIPTION 1573 * Handles 32 byte 'Action 1B' of Single Program Action Codes. 1574 * A write operation could not be finished because of an unexpected 1575 * condition. 1576 * The already created 'default erp' is used to get the link to 1577 * the erp chain, but it can not be used for this recovery 1578 * action because it contains no DE/LO data space. 1579 * 1580 * PARAMETER 1581 * default_erp already added default erp. 1582 * sense current sense data 1583 * 1584 * RETURN VALUES 1585 * erp new erp or 1586 * default_erp in case of imprecise ending or error 1587 */ 1588 static struct dasd_ccw_req * 1589 dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) 1590 { 1591 1592 struct dasd_device *device = default_erp->startdev; 1593 __u32 cpa = 0; 1594 struct dasd_ccw_req *cqr; 1595 struct dasd_ccw_req *erp; 1596 struct DE_eckd_data *DE_data; 1597 struct PFX_eckd_data *PFX_data; 1598 char *LO_data; /* LO_eckd_data_t */ 1599 struct ccw1 *ccw, *oldccw; 1600 1601 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1602 "Write not finished because of unexpected condition"); 1603 1604 default_erp->function = dasd_3990_erp_action_1B_32; 1605 1606 /* determine the original cqr */ 1607 cqr = default_erp; 1608 1609 while (cqr->refers != NULL) { 1610 cqr = cqr->refers; 1611 } 1612 1613 if (scsw_is_tm(&cqr->irb.scsw)) { 1614 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1615 "32 bit sense, action 1B is not defined" 1616 " in transport mode - just retry"); 1617 return default_erp; 1618 } 1619 1620 /* for imprecise ending just do default erp */ 1621 if (sense[1] & 0x01) { 1622 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1623 "Imprecise ending is set - just retry"); 1624 1625 return default_erp; 1626 } 1627 1628 /* determine the address of the CCW to be restarted */ 1629 /* Imprecise ending is not set -> addr from IRB-SCSW */ 1630 cpa = default_erp->refers->irb.scsw.cmd.cpa; 1631 1632 if (cpa == 0) { 1633 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1634 "Unable to determine address of the CCW " 1635 "to be restarted"); 1636 1637 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1638 } 1639 1640 /* Build new ERP request including DE/LO */ 1641 erp = dasd_alloc_erp_request((char *) &cqr->magic, 1642 2 + 1,/* DE/LO + TIC */ 1643 sizeof(struct DE_eckd_data) + 1644 sizeof(struct LO_eckd_data), device); 1645 1646 if (IS_ERR(erp)) { 1647 /* internal error 01 - Unable to allocate ERP */ 1648 dev_err(&device->cdev->dev, "An error occurred in the DASD " 1649 "device driver, reason=%s\n", "01"); 1650 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1651 } 1652 1653 /* use original DE */ 1654 DE_data = erp->data; 1655 oldccw = cqr->cpaddr; 1656 if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) { 1657 PFX_data = cqr->data; 1658 memcpy(DE_data, &PFX_data->define_extent, 1659 sizeof(struct DE_eckd_data)); 1660 } else 1661 memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data)); 1662 1663 /* create LO */ 1664 LO_data = erp->data + sizeof(struct DE_eckd_data); 1665 1666 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { 1667 /* should not */ 1668 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1669 } 1670 1671 if ((sense[7] & 0x3F) == 0x01) { 1672 /* operation code is WRITE DATA -> data area orientation */ 1673 LO_data[0] = 0x81; 1674 1675 } else if ((sense[7] & 0x3F) == 0x03) { 1676 /* operation code is FORMAT WRITE -> index orientation */ 1677 LO_data[0] = 0xC3; 1678 1679 } else { 1680 LO_data[0] = sense[7]; /* operation */ 1681 } 1682 1683 LO_data[1] = sense[8]; /* auxiliary */ 1684 LO_data[2] = sense[9]; 1685 LO_data[3] = sense[3]; /* count */ 1686 LO_data[4] = sense[29]; /* seek_addr.cyl */ 1687 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */ 1688 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */ 1689 1690 memcpy(&(LO_data[8]), &(sense[11]), 8); 1691 1692 /* create DE ccw */ 1693 ccw = erp->cpaddr; 1694 memset(ccw, 0, sizeof(struct ccw1)); 1695 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 1696 ccw->flags = CCW_FLAG_CC; 1697 ccw->count = 16; 1698 ccw->cda = (__u32)(addr_t) DE_data; 1699 1700 /* create LO ccw */ 1701 ccw++; 1702 memset(ccw, 0, sizeof(struct ccw1)); 1703 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 1704 ccw->flags = CCW_FLAG_CC; 1705 ccw->count = 16; 1706 ccw->cda = (__u32)(addr_t) LO_data; 1707 1708 /* TIC to the failed ccw */ 1709 ccw++; 1710 ccw->cmd_code = CCW_CMD_TIC; 1711 ccw->cda = cpa; 1712 1713 /* fill erp related fields */ 1714 erp->flags = default_erp->flags; 1715 erp->function = dasd_3990_erp_action_1B_32; 1716 erp->refers = default_erp->refers; 1717 erp->startdev = device; 1718 erp->memdev = device; 1719 erp->magic = default_erp->magic; 1720 erp->expires = default_erp->expires; 1721 erp->retries = 256; 1722 erp->buildclk = get_tod_clock(); 1723 erp->status = DASD_CQR_FILLED; 1724 1725 /* remove the default erp */ 1726 dasd_free_erp_request(default_erp, device); 1727 1728 return erp; 1729 1730 } /* end dasd_3990_erp_action_1B_32 */ 1731 1732 /* 1733 * DASD_3990_UPDATE_1B 1734 * 1735 * DESCRIPTION 1736 * Handles the update to the 32 byte 'Action 1B' of Single Program 1737 * Action Codes in case the first action was not successful. 1738 * The already created 'previous_erp' is the currently not successful 1739 * ERP. 1740 * 1741 * PARAMETER 1742 * previous_erp already created previous erp. 1743 * sense current sense data 1744 * RETURN VALUES 1745 * erp modified erp 1746 */ 1747 static struct dasd_ccw_req * 1748 dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense) 1749 { 1750 1751 struct dasd_device *device = previous_erp->startdev; 1752 __u32 cpa = 0; 1753 struct dasd_ccw_req *cqr; 1754 struct dasd_ccw_req *erp; 1755 char *LO_data; /* struct LO_eckd_data */ 1756 struct ccw1 *ccw; 1757 1758 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1759 "Write not finished because of unexpected condition" 1760 " - follow on"); 1761 1762 /* determine the original cqr */ 1763 cqr = previous_erp; 1764 1765 while (cqr->refers != NULL) { 1766 cqr = cqr->refers; 1767 } 1768 1769 if (scsw_is_tm(&cqr->irb.scsw)) { 1770 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1771 "32 bit sense, action 1B, update," 1772 " in transport mode - just retry"); 1773 return previous_erp; 1774 } 1775 1776 /* for imprecise ending just do default erp */ 1777 if (sense[1] & 0x01) { 1778 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1779 "Imprecise ending is set - just retry"); 1780 1781 previous_erp->status = DASD_CQR_FILLED; 1782 1783 return previous_erp; 1784 } 1785 1786 /* determine the address of the CCW to be restarted */ 1787 /* Imprecise ending is not set -> addr from IRB-SCSW */ 1788 cpa = previous_erp->irb.scsw.cmd.cpa; 1789 1790 if (cpa == 0) { 1791 /* internal error 02 - 1792 Unable to determine address of the CCW to be restarted */ 1793 dev_err(&device->cdev->dev, "An error occurred in the DASD " 1794 "device driver, reason=%s\n", "02"); 1795 1796 previous_erp->status = DASD_CQR_FAILED; 1797 1798 return previous_erp; 1799 } 1800 1801 erp = previous_erp; 1802 1803 /* update the LO with the new returned sense data */ 1804 LO_data = erp->data + sizeof(struct DE_eckd_data); 1805 1806 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { 1807 /* should not happen */ 1808 previous_erp->status = DASD_CQR_FAILED; 1809 1810 return previous_erp; 1811 } 1812 1813 if ((sense[7] & 0x3F) == 0x01) { 1814 /* operation code is WRITE DATA -> data area orientation */ 1815 LO_data[0] = 0x81; 1816 1817 } else if ((sense[7] & 0x3F) == 0x03) { 1818 /* operation code is FORMAT WRITE -> index orientation */ 1819 LO_data[0] = 0xC3; 1820 1821 } else { 1822 LO_data[0] = sense[7]; /* operation */ 1823 } 1824 1825 LO_data[1] = sense[8]; /* auxiliary */ 1826 LO_data[2] = sense[9]; 1827 LO_data[3] = sense[3]; /* count */ 1828 LO_data[4] = sense[29]; /* seek_addr.cyl */ 1829 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */ 1830 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */ 1831 1832 memcpy(&(LO_data[8]), &(sense[11]), 8); 1833 1834 /* TIC to the failed ccw */ 1835 ccw = erp->cpaddr; /* addr of DE ccw */ 1836 ccw++; /* addr of LE ccw */ 1837 ccw++; /* addr of TIC ccw */ 1838 ccw->cda = cpa; 1839 1840 erp->status = DASD_CQR_FILLED; 1841 1842 return erp; 1843 1844 } /* end dasd_3990_update_1B */ 1845 1846 /* 1847 * DASD_3990_ERP_COMPOUND_RETRY 1848 * 1849 * DESCRIPTION 1850 * Handles the compound ERP action retry code. 1851 * NOTE: At least one retry is done even if zero is specified 1852 * by the sense data. This makes enqueueing of the request 1853 * easier. 1854 * 1855 * PARAMETER 1856 * sense sense data of the actual error 1857 * erp pointer to the currently created ERP 1858 * 1859 * RETURN VALUES 1860 * erp modified ERP pointer 1861 * 1862 */ 1863 static void 1864 dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense) 1865 { 1866 1867 switch (sense[25] & 0x03) { 1868 case 0x00: /* no not retry */ 1869 erp->retries = 1; 1870 break; 1871 1872 case 0x01: /* retry 2 times */ 1873 erp->retries = 2; 1874 break; 1875 1876 case 0x02: /* retry 10 times */ 1877 erp->retries = 10; 1878 break; 1879 1880 case 0x03: /* retry 256 times */ 1881 erp->retries = 256; 1882 break; 1883 1884 default: 1885 BUG(); 1886 } 1887 1888 erp->function = dasd_3990_erp_compound_retry; 1889 1890 } /* end dasd_3990_erp_compound_retry */ 1891 1892 /* 1893 * DASD_3990_ERP_COMPOUND_PATH 1894 * 1895 * DESCRIPTION 1896 * Handles the compound ERP action for retry on alternate 1897 * channel path. 1898 * 1899 * PARAMETER 1900 * sense sense data of the actual error 1901 * erp pointer to the currently created ERP 1902 * 1903 * RETURN VALUES 1904 * erp modified ERP pointer 1905 * 1906 */ 1907 static void 1908 dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense) 1909 { 1910 if (sense[25] & DASD_SENSE_BIT_3) { 1911 dasd_3990_erp_alternate_path(erp); 1912 1913 if (erp->status == DASD_CQR_FAILED && 1914 !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) { 1915 /* reset the lpm and the status to be able to 1916 * try further actions. */ 1917 erp->lpm = erp->startdev->path_data.opm; 1918 erp->status = DASD_CQR_NEED_ERP; 1919 } 1920 } 1921 1922 erp->function = dasd_3990_erp_compound_path; 1923 1924 } /* end dasd_3990_erp_compound_path */ 1925 1926 /* 1927 * DASD_3990_ERP_COMPOUND_CODE 1928 * 1929 * DESCRIPTION 1930 * Handles the compound ERP action for retry code. 1931 * 1932 * PARAMETER 1933 * sense sense data of the actual error 1934 * erp pointer to the currently created ERP 1935 * 1936 * RETURN VALUES 1937 * erp NEW ERP pointer 1938 * 1939 */ 1940 static struct dasd_ccw_req * 1941 dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense) 1942 { 1943 1944 if (sense[25] & DASD_SENSE_BIT_2) { 1945 1946 switch (sense[28]) { 1947 case 0x17: 1948 /* issue a Diagnostic Control command with an 1949 * Inhibit Write subcommand and controller modifier */ 1950 erp = dasd_3990_erp_DCTL(erp, 0x20); 1951 break; 1952 1953 case 0x25: 1954 /* wait for 5 seconds and retry again */ 1955 erp->retries = 1; 1956 1957 dasd_3990_erp_block_queue (erp, 5*HZ); 1958 break; 1959 1960 default: 1961 /* should not happen - continue */ 1962 break; 1963 } 1964 } 1965 1966 erp->function = dasd_3990_erp_compound_code; 1967 1968 return erp; 1969 1970 } /* end dasd_3990_erp_compound_code */ 1971 1972 /* 1973 * DASD_3990_ERP_COMPOUND_CONFIG 1974 * 1975 * DESCRIPTION 1976 * Handles the compound ERP action for configruation 1977 * dependent error. 1978 * Note: duplex handling is not implemented (yet). 1979 * 1980 * PARAMETER 1981 * sense sense data of the actual error 1982 * erp pointer to the currently created ERP 1983 * 1984 * RETURN VALUES 1985 * erp modified ERP pointer 1986 * 1987 */ 1988 static void 1989 dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense) 1990 { 1991 1992 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) { 1993 1994 /* set to suspended duplex state then restart 1995 internal error 05 - Set device to suspended duplex state 1996 should be done */ 1997 struct dasd_device *device = erp->startdev; 1998 dev_err(&device->cdev->dev, 1999 "An error occurred in the DASD device driver, " 2000 "reason=%s\n", "05"); 2001 2002 } 2003 2004 erp->function = dasd_3990_erp_compound_config; 2005 2006 } /* end dasd_3990_erp_compound_config */ 2007 2008 /* 2009 * DASD_3990_ERP_COMPOUND 2010 * 2011 * DESCRIPTION 2012 * Does the further compound program action if 2013 * compound retry was not successful. 2014 * 2015 * PARAMETER 2016 * sense sense data of the actual error 2017 * erp pointer to the current (failed) ERP 2018 * 2019 * RETURN VALUES 2020 * erp (additional) ERP pointer 2021 * 2022 */ 2023 static struct dasd_ccw_req * 2024 dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense) 2025 { 2026 2027 if ((erp->function == dasd_3990_erp_compound_retry) && 2028 (erp->status == DASD_CQR_NEED_ERP)) { 2029 2030 dasd_3990_erp_compound_path(erp, sense); 2031 } 2032 2033 if ((erp->function == dasd_3990_erp_compound_path) && 2034 (erp->status == DASD_CQR_NEED_ERP)) { 2035 2036 erp = dasd_3990_erp_compound_code(erp, sense); 2037 } 2038 2039 if ((erp->function == dasd_3990_erp_compound_code) && 2040 (erp->status == DASD_CQR_NEED_ERP)) { 2041 2042 dasd_3990_erp_compound_config(erp, sense); 2043 } 2044 2045 /* if no compound action ERP specified, the request failed */ 2046 if (erp->status == DASD_CQR_NEED_ERP) 2047 erp->status = DASD_CQR_FAILED; 2048 2049 return erp; 2050 2051 } /* end dasd_3990_erp_compound */ 2052 2053 /* 2054 *DASD_3990_ERP_HANDLE_SIM 2055 * 2056 *DESCRIPTION 2057 * inspects the SIM SENSE data and starts an appropriate action 2058 * 2059 * PARAMETER 2060 * sense sense data of the actual error 2061 * 2062 * RETURN VALUES 2063 * none 2064 */ 2065 void 2066 dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense) 2067 { 2068 /* print message according to log or message to operator mode */ 2069 if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) { 2070 /* print SIM SRC from RefCode */ 2071 dev_err(&device->cdev->dev, "SIM - SRC: " 2072 "%02x%02x%02x%02x\n", sense[22], 2073 sense[23], sense[11], sense[12]); 2074 } else if (sense[24] & DASD_SIM_LOG) { 2075 /* print SIM SRC Refcode */ 2076 dev_warn(&device->cdev->dev, "log SIM - SRC: " 2077 "%02x%02x%02x%02x\n", sense[22], 2078 sense[23], sense[11], sense[12]); 2079 } 2080 } 2081 2082 /* 2083 * DASD_3990_ERP_INSPECT_32 2084 * 2085 * DESCRIPTION 2086 * Does a detailed inspection of the 32 byte sense data 2087 * and sets up a related error recovery action. 2088 * 2089 * PARAMETER 2090 * sense sense data of the actual error 2091 * erp pointer to the currently created default ERP 2092 * 2093 * RETURN VALUES 2094 * erp_filled pointer to the ERP 2095 * 2096 */ 2097 static struct dasd_ccw_req * 2098 dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense) 2099 { 2100 2101 struct dasd_device *device = erp->startdev; 2102 2103 erp->function = dasd_3990_erp_inspect_32; 2104 2105 /* check for SIM sense data */ 2106 if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE) 2107 dasd_3990_erp_handle_sim(device, sense); 2108 2109 if (sense[25] & DASD_SENSE_BIT_0) { 2110 2111 /* compound program action codes (byte25 bit 0 == '1') */ 2112 dasd_3990_erp_compound_retry(erp, sense); 2113 2114 } else { 2115 2116 /* single program action codes (byte25 bit 0 == '0') */ 2117 switch (sense[25]) { 2118 2119 case 0x00: /* success - use default ERP for retries */ 2120 DBF_DEV_EVENT(DBF_DEBUG, device, "%s", 2121 "ERP called for successful request" 2122 " - just retry"); 2123 break; 2124 2125 case 0x01: /* fatal error */ 2126 dev_err(&device->cdev->dev, 2127 "ERP failed for the DASD\n"); 2128 2129 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2130 break; 2131 2132 case 0x02: /* intervention required */ 2133 case 0x03: /* intervention required during dual copy */ 2134 erp = dasd_3990_erp_int_req(erp); 2135 break; 2136 2137 case 0x0F: /* length mismatch during update write command 2138 internal error 08 - update write command error*/ 2139 dev_err(&device->cdev->dev, "An error occurred in the " 2140 "DASD device driver, reason=%s\n", "08"); 2141 2142 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2143 break; 2144 2145 case 0x10: /* logging required for other channel program */ 2146 erp = dasd_3990_erp_action_10_32(erp, sense); 2147 break; 2148 2149 case 0x15: /* next track outside defined extend 2150 internal error 07 - The next track is not 2151 within the defined storage extent */ 2152 dev_err(&device->cdev->dev, 2153 "An error occurred in the DASD device driver, " 2154 "reason=%s\n", "07"); 2155 2156 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2157 break; 2158 2159 case 0x1B: /* unexpected condition during write */ 2160 2161 erp = dasd_3990_erp_action_1B_32(erp, sense); 2162 break; 2163 2164 case 0x1C: /* invalid data */ 2165 dev_emerg(&device->cdev->dev, 2166 "Data recovered during retry with PCI " 2167 "fetch mode active\n"); 2168 2169 /* not possible to handle this situation in Linux */ 2170 panic 2171 ("Invalid data - No way to inform application " 2172 "about the possibly incorrect data"); 2173 break; 2174 2175 case 0x1D: /* state-change pending */ 2176 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2177 "A State change pending condition exists " 2178 "for the subsystem or device"); 2179 2180 erp = dasd_3990_erp_action_4(erp, sense); 2181 break; 2182 2183 case 0x1E: /* busy */ 2184 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2185 "Busy condition exists " 2186 "for the subsystem or device"); 2187 erp = dasd_3990_erp_action_4(erp, sense); 2188 break; 2189 2190 default: /* all others errors - default erp */ 2191 break; 2192 } 2193 } 2194 2195 return erp; 2196 2197 } /* end dasd_3990_erp_inspect_32 */ 2198 2199 /* 2200 ***************************************************************************** 2201 * main ERP control functions (24 and 32 byte sense) 2202 ***************************************************************************** 2203 */ 2204 2205 /* 2206 * DASD_3990_ERP_CONTROL_CHECK 2207 * 2208 * DESCRIPTION 2209 * Does a generic inspection if a control check occurred and sets up 2210 * the related error recovery procedure 2211 * 2212 * PARAMETER 2213 * erp pointer to the currently created default ERP 2214 * 2215 * RETURN VALUES 2216 * erp_filled pointer to the erp 2217 */ 2218 2219 static struct dasd_ccw_req * 2220 dasd_3990_erp_control_check(struct dasd_ccw_req *erp) 2221 { 2222 struct dasd_device *device = erp->startdev; 2223 2224 if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK 2225 | SCHN_STAT_CHN_CTRL_CHK)) { 2226 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2227 "channel or interface control check"); 2228 erp = dasd_3990_erp_action_4(erp, NULL); 2229 } 2230 return erp; 2231 } 2232 2233 /* 2234 * DASD_3990_ERP_INSPECT 2235 * 2236 * DESCRIPTION 2237 * Does a detailed inspection for sense data by calling either 2238 * the 24-byte or the 32-byte inspection routine. 2239 * 2240 * PARAMETER 2241 * erp pointer to the currently created default ERP 2242 * RETURN VALUES 2243 * erp_new contens was possibly modified 2244 */ 2245 static struct dasd_ccw_req * 2246 dasd_3990_erp_inspect(struct dasd_ccw_req *erp) 2247 { 2248 2249 struct dasd_ccw_req *erp_new = NULL; 2250 char *sense; 2251 2252 /* if this problem occurred on an alias retry on base */ 2253 erp_new = dasd_3990_erp_inspect_alias(erp); 2254 if (erp_new) 2255 return erp_new; 2256 2257 /* sense data are located in the refers record of the 2258 * already set up new ERP ! 2259 * check if concurrent sens is available 2260 */ 2261 sense = dasd_get_sense(&erp->refers->irb); 2262 if (!sense) 2263 erp_new = dasd_3990_erp_control_check(erp); 2264 /* distinguish between 24 and 32 byte sense data */ 2265 else if (sense[27] & DASD_SENSE_BIT_0) { 2266 2267 /* inspect the 24 byte sense data */ 2268 erp_new = dasd_3990_erp_inspect_24(erp, sense); 2269 2270 } else { 2271 2272 /* inspect the 32 byte sense data */ 2273 erp_new = dasd_3990_erp_inspect_32(erp, sense); 2274 2275 } /* end distinguish between 24 and 32 byte sense data */ 2276 2277 return erp_new; 2278 } 2279 2280 /* 2281 * DASD_3990_ERP_ADD_ERP 2282 * 2283 * DESCRIPTION 2284 * This function adds an additional request block (ERP) to the head of 2285 * the given cqr (or erp). 2286 * For a command mode cqr the erp is initialized as an default erp 2287 * (retry TIC). 2288 * For transport mode we make a copy of the original TCW (points to 2289 * the original TCCB, TIDALs, etc.) but give it a fresh 2290 * TSB so the original sense data will not be changed. 2291 * 2292 * PARAMETER 2293 * cqr head of the current ERP-chain (or single cqr if 2294 * first error) 2295 * RETURN VALUES 2296 * erp pointer to new ERP-chain head 2297 */ 2298 static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr) 2299 { 2300 2301 struct dasd_device *device = cqr->startdev; 2302 struct ccw1 *ccw; 2303 struct dasd_ccw_req *erp; 2304 int cplength, datasize; 2305 struct tcw *tcw; 2306 struct tsb *tsb; 2307 2308 if (cqr->cpmode == 1) { 2309 cplength = 0; 2310 /* TCW needs to be 64 byte aligned, so leave enough room */ 2311 datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb); 2312 } else { 2313 cplength = 2; 2314 datasize = 0; 2315 } 2316 2317 /* allocate additional request block */ 2318 erp = dasd_alloc_erp_request((char *) &cqr->magic, 2319 cplength, datasize, device); 2320 if (IS_ERR(erp)) { 2321 if (cqr->retries <= 0) { 2322 DBF_DEV_EVENT(DBF_ERR, device, "%s", 2323 "Unable to allocate ERP request"); 2324 cqr->status = DASD_CQR_FAILED; 2325 cqr->stopclk = get_tod_clock(); 2326 } else { 2327 DBF_DEV_EVENT(DBF_ERR, device, 2328 "Unable to allocate ERP request " 2329 "(%i retries left)", 2330 cqr->retries); 2331 dasd_block_set_timer(device->block, (HZ << 3)); 2332 } 2333 return erp; 2334 } 2335 2336 ccw = cqr->cpaddr; 2337 if (cqr->cpmode == 1) { 2338 /* make a shallow copy of the original tcw but set new tsb */ 2339 erp->cpmode = 1; 2340 erp->cpaddr = PTR_ALIGN(erp->data, 64); 2341 tcw = erp->cpaddr; 2342 tsb = (struct tsb *) &tcw[1]; 2343 *tcw = *((struct tcw *)cqr->cpaddr); 2344 tcw->tsb = (long)tsb; 2345 } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) { 2346 /* PSF cannot be chained from NOOP/TIC */ 2347 erp->cpaddr = cqr->cpaddr; 2348 } else { 2349 /* initialize request with default TIC to current ERP/CQR */ 2350 ccw = erp->cpaddr; 2351 ccw->cmd_code = CCW_CMD_NOOP; 2352 ccw->flags = CCW_FLAG_CC; 2353 ccw++; 2354 ccw->cmd_code = CCW_CMD_TIC; 2355 ccw->cda = (long)(cqr->cpaddr); 2356 } 2357 2358 erp->flags = cqr->flags; 2359 erp->function = dasd_3990_erp_add_erp; 2360 erp->refers = cqr; 2361 erp->startdev = device; 2362 erp->memdev = device; 2363 erp->block = cqr->block; 2364 erp->magic = cqr->magic; 2365 erp->expires = cqr->expires; 2366 erp->retries = 256; 2367 erp->buildclk = get_tod_clock(); 2368 erp->status = DASD_CQR_FILLED; 2369 2370 return erp; 2371 } 2372 2373 /* 2374 * DASD_3990_ERP_ADDITIONAL_ERP 2375 * 2376 * DESCRIPTION 2377 * An additional ERP is needed to handle the current error. 2378 * Add ERP to the head of the ERP-chain containing the ERP processing 2379 * determined based on the sense data. 2380 * 2381 * PARAMETER 2382 * cqr head of the current ERP-chain (or single cqr if 2383 * first error) 2384 * 2385 * RETURN VALUES 2386 * erp pointer to new ERP-chain head 2387 */ 2388 static struct dasd_ccw_req * 2389 dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr) 2390 { 2391 2392 struct dasd_ccw_req *erp = NULL; 2393 2394 /* add erp and initialize with default TIC */ 2395 erp = dasd_3990_erp_add_erp(cqr); 2396 2397 if (IS_ERR(erp)) 2398 return erp; 2399 2400 /* inspect sense, determine specific ERP if possible */ 2401 if (erp != cqr) { 2402 2403 erp = dasd_3990_erp_inspect(erp); 2404 } 2405 2406 return erp; 2407 2408 } /* end dasd_3990_erp_additional_erp */ 2409 2410 /* 2411 * DASD_3990_ERP_ERROR_MATCH 2412 * 2413 * DESCRIPTION 2414 * Check if the device status of the given cqr is the same. 2415 * This means that the failed CCW and the relevant sense data 2416 * must match. 2417 * I don't distinguish between 24 and 32 byte sense because in case of 2418 * 24 byte sense byte 25 and 27 is set as well. 2419 * 2420 * PARAMETER 2421 * cqr1 first cqr, which will be compared with the 2422 * cqr2 second cqr. 2423 * 2424 * RETURN VALUES 2425 * match 'boolean' for match found 2426 * returns 1 if match found, otherwise 0. 2427 */ 2428 static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, 2429 struct dasd_ccw_req *cqr2) 2430 { 2431 char *sense1, *sense2; 2432 2433 if (cqr1->startdev != cqr2->startdev) 2434 return 0; 2435 2436 sense1 = dasd_get_sense(&cqr1->irb); 2437 sense2 = dasd_get_sense(&cqr2->irb); 2438 2439 /* one request has sense data, the other not -> no match, return 0 */ 2440 if (!sense1 != !sense2) 2441 return 0; 2442 /* no sense data in both cases -> check cstat for IFCC */ 2443 if (!sense1 && !sense2) { 2444 if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | 2445 SCHN_STAT_CHN_CTRL_CHK)) == 2446 (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | 2447 SCHN_STAT_CHN_CTRL_CHK))) 2448 return 1; /* match with ifcc*/ 2449 } 2450 /* check sense data; byte 0-2,25,27 */ 2451 if (!(sense1 && sense2 && 2452 (memcmp(sense1, sense2, 3) == 0) && 2453 (sense1[27] == sense2[27]) && 2454 (sense1[25] == sense2[25]))) { 2455 2456 return 0; /* sense doesn't match */ 2457 } 2458 2459 return 1; /* match */ 2460 2461 } /* end dasd_3990_erp_error_match */ 2462 2463 /* 2464 * DASD_3990_ERP_IN_ERP 2465 * 2466 * DESCRIPTION 2467 * check if the current error already happened before. 2468 * quick exit if current cqr is not an ERP (cqr->refers=NULL) 2469 * 2470 * PARAMETER 2471 * cqr failed cqr (either original cqr or already an erp) 2472 * 2473 * RETURN VALUES 2474 * erp erp-pointer to the already defined error 2475 * recovery procedure OR 2476 * NULL if a 'new' error occurred. 2477 */ 2478 static struct dasd_ccw_req * 2479 dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr) 2480 { 2481 2482 struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */ 2483 *erp_match = NULL; /* save erp chain head */ 2484 int match = 0; /* 'boolean' for matching error found */ 2485 2486 if (cqr->refers == NULL) { /* return if not in erp */ 2487 return NULL; 2488 } 2489 2490 /* check the erp/cqr chain for current error */ 2491 do { 2492 match = dasd_3990_erp_error_match(erp_head, cqr->refers); 2493 erp_match = cqr; /* save possible matching erp */ 2494 cqr = cqr->refers; /* check next erp/cqr in queue */ 2495 2496 } while ((cqr->refers != NULL) && (!match)); 2497 2498 if (!match) { 2499 return NULL; /* no match was found */ 2500 } 2501 2502 return erp_match; /* return address of matching erp */ 2503 2504 } /* END dasd_3990_erp_in_erp */ 2505 2506 /* 2507 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense) 2508 * 2509 * DESCRIPTION 2510 * No retry is left for the current ERP. Check what has to be done 2511 * with the ERP. 2512 * - do further defined ERP action or 2513 * - wait for interrupt or 2514 * - exit with permanent error 2515 * 2516 * PARAMETER 2517 * erp ERP which is in progress with no retry left 2518 * 2519 * RETURN VALUES 2520 * erp modified/additional ERP 2521 */ 2522 static struct dasd_ccw_req * 2523 dasd_3990_erp_further_erp(struct dasd_ccw_req *erp) 2524 { 2525 2526 struct dasd_device *device = erp->startdev; 2527 char *sense = dasd_get_sense(&erp->irb); 2528 2529 /* check for 24 byte sense ERP */ 2530 if ((erp->function == dasd_3990_erp_bus_out) || 2531 (erp->function == dasd_3990_erp_action_1) || 2532 (erp->function == dasd_3990_erp_action_4)) { 2533 2534 erp = dasd_3990_erp_action_1(erp); 2535 2536 } else if (erp->function == dasd_3990_erp_action_1_sec) { 2537 erp = dasd_3990_erp_action_1_sec(erp); 2538 } else if (erp->function == dasd_3990_erp_action_5) { 2539 2540 /* retries have not been successful */ 2541 /* prepare erp for retry on different channel path */ 2542 erp = dasd_3990_erp_action_1(erp); 2543 2544 if (sense && !(sense[2] & DASD_SENSE_BIT_0)) { 2545 2546 /* issue a Diagnostic Control command with an 2547 * Inhibit Write subcommand */ 2548 2549 switch (sense[25]) { 2550 case 0x17: 2551 case 0x57:{ /* controller */ 2552 erp = dasd_3990_erp_DCTL(erp, 0x20); 2553 break; 2554 } 2555 case 0x18: 2556 case 0x58:{ /* channel path */ 2557 erp = dasd_3990_erp_DCTL(erp, 0x40); 2558 break; 2559 } 2560 case 0x19: 2561 case 0x59:{ /* storage director */ 2562 erp = dasd_3990_erp_DCTL(erp, 0x80); 2563 break; 2564 } 2565 default: 2566 DBF_DEV_EVENT(DBF_WARNING, device, 2567 "invalid subcommand modifier 0x%x " 2568 "for Diagnostic Control Command", 2569 sense[25]); 2570 } 2571 } 2572 2573 /* check for 32 byte sense ERP */ 2574 } else if (sense && 2575 ((erp->function == dasd_3990_erp_compound_retry) || 2576 (erp->function == dasd_3990_erp_compound_path) || 2577 (erp->function == dasd_3990_erp_compound_code) || 2578 (erp->function == dasd_3990_erp_compound_config))) { 2579 2580 erp = dasd_3990_erp_compound(erp, sense); 2581 2582 } else { 2583 /* 2584 * No retry left and no additional special handling 2585 * necessary 2586 */ 2587 dev_err(&device->cdev->dev, 2588 "ERP %p has run out of retries and failed\n", erp); 2589 2590 erp->status = DASD_CQR_FAILED; 2591 } 2592 2593 return erp; 2594 2595 } /* end dasd_3990_erp_further_erp */ 2596 2597 /* 2598 * DASD_3990_ERP_HANDLE_MATCH_ERP 2599 * 2600 * DESCRIPTION 2601 * An error occurred again and an ERP has been detected which is already 2602 * used to handle this error (e.g. retries). 2603 * All prior ERP's are asumed to be successful and therefore removed 2604 * from queue. 2605 * If retry counter of matching erp is already 0, it is checked if further 2606 * action is needed (besides retry) or if the ERP has failed. 2607 * 2608 * PARAMETER 2609 * erp_head first ERP in ERP-chain 2610 * erp ERP that handles the actual error. 2611 * (matching erp) 2612 * 2613 * RETURN VALUES 2614 * erp modified/additional ERP 2615 */ 2616 static struct dasd_ccw_req * 2617 dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head, 2618 struct dasd_ccw_req *erp) 2619 { 2620 2621 struct dasd_device *device = erp_head->startdev; 2622 struct dasd_ccw_req *erp_done = erp_head; /* finished req */ 2623 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */ 2624 2625 /* loop over successful ERPs and remove them from chanq */ 2626 while (erp_done != erp) { 2627 2628 if (erp_done == NULL) /* end of chain reached */ 2629 panic(PRINTK_HEADER "Programming error in ERP! The " 2630 "original request was lost\n"); 2631 2632 /* remove the request from the device queue */ 2633 list_del(&erp_done->blocklist); 2634 2635 erp_free = erp_done; 2636 erp_done = erp_done->refers; 2637 2638 /* free the finished erp request */ 2639 dasd_free_erp_request(erp_free, erp_free->memdev); 2640 2641 } /* end while */ 2642 2643 if (erp->retries > 0) { 2644 2645 char *sense = dasd_get_sense(&erp->refers->irb); 2646 2647 /* check for special retries */ 2648 if (sense && erp->function == dasd_3990_erp_action_4) { 2649 2650 erp = dasd_3990_erp_action_4(erp, sense); 2651 2652 } else if (sense && 2653 erp->function == dasd_3990_erp_action_1B_32) { 2654 2655 erp = dasd_3990_update_1B(erp, sense); 2656 2657 } else if (sense && erp->function == dasd_3990_erp_int_req) { 2658 2659 erp = dasd_3990_erp_int_req(erp); 2660 2661 } else { 2662 /* simple retry */ 2663 DBF_DEV_EVENT(DBF_DEBUG, device, 2664 "%i retries left for erp %p", 2665 erp->retries, erp); 2666 2667 /* handle the request again... */ 2668 erp->status = DASD_CQR_FILLED; 2669 } 2670 2671 } else { 2672 /* no retry left - check for further necessary action */ 2673 /* if no further actions, handle rest as permanent error */ 2674 erp = dasd_3990_erp_further_erp(erp); 2675 } 2676 2677 return erp; 2678 2679 } /* end dasd_3990_erp_handle_match_erp */ 2680 2681 /* 2682 * DASD_3990_ERP_ACTION 2683 * 2684 * DESCRIPTION 2685 * control routine for 3990 erp actions. 2686 * Has to be called with the queue lock (namely the s390_irq_lock) acquired. 2687 * 2688 * PARAMETER 2689 * cqr failed cqr (either original cqr or already an erp) 2690 * 2691 * RETURN VALUES 2692 * erp erp-pointer to the head of the ERP action chain. 2693 * This means: 2694 * - either a ptr to an additional ERP cqr or 2695 * - the original given cqr (which's status might 2696 * be modified) 2697 */ 2698 struct dasd_ccw_req * 2699 dasd_3990_erp_action(struct dasd_ccw_req * cqr) 2700 { 2701 struct dasd_ccw_req *erp = NULL; 2702 struct dasd_device *device = cqr->startdev; 2703 struct dasd_ccw_req *temp_erp = NULL; 2704 2705 if (device->features & DASD_FEATURE_ERPLOG) { 2706 /* print current erp_chain */ 2707 dev_err(&device->cdev->dev, 2708 "ERP chain at BEGINNING of ERP-ACTION\n"); 2709 for (temp_erp = cqr; 2710 temp_erp != NULL; temp_erp = temp_erp->refers) { 2711 2712 dev_err(&device->cdev->dev, 2713 "ERP %p (%02x) refers to %p\n", 2714 temp_erp, temp_erp->status, 2715 temp_erp->refers); 2716 } 2717 } 2718 2719 /* double-check if current erp/cqr was successful */ 2720 if ((scsw_cstat(&cqr->irb.scsw) == 0x00) && 2721 (scsw_dstat(&cqr->irb.scsw) == 2722 (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) { 2723 2724 DBF_DEV_EVENT(DBF_DEBUG, device, 2725 "ERP called for successful request %p" 2726 " - NO ERP necessary", cqr); 2727 2728 cqr->status = DASD_CQR_DONE; 2729 2730 return cqr; 2731 } 2732 2733 /* check if error happened before */ 2734 erp = dasd_3990_erp_in_erp(cqr); 2735 2736 if (erp == NULL) { 2737 /* no matching erp found - set up erp */ 2738 erp = dasd_3990_erp_additional_erp(cqr); 2739 if (IS_ERR(erp)) 2740 return erp; 2741 } else { 2742 /* matching erp found - set all leading erp's to DONE */ 2743 erp = dasd_3990_erp_handle_match_erp(cqr, erp); 2744 } 2745 2746 if (device->features & DASD_FEATURE_ERPLOG) { 2747 /* print current erp_chain */ 2748 dev_err(&device->cdev->dev, 2749 "ERP chain at END of ERP-ACTION\n"); 2750 for (temp_erp = erp; 2751 temp_erp != NULL; temp_erp = temp_erp->refers) { 2752 2753 dev_err(&device->cdev->dev, 2754 "ERP %p (%02x) refers to %p\n", 2755 temp_erp, temp_erp->status, 2756 temp_erp->refers); 2757 } 2758 } 2759 2760 /* enqueue ERP request if it's a new one */ 2761 if (list_empty(&erp->blocklist)) { 2762 cqr->status = DASD_CQR_IN_ERP; 2763 /* add erp request before the cqr */ 2764 list_add_tail(&erp->blocklist, &cqr->blocklist); 2765 } 2766 2767 2768 2769 return erp; 2770 2771 } /* end dasd_3990_erp_action */ 2772