1 /* 2 * File...........: linux/drivers/s390/block/dasd_3990_erp.c 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 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 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 //FIXME: start with get_opm ? 156 if (erp->lpm == 0) 157 erp->lpm = LPM_ANYPATH & ~(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((char *) &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)(addr_t) 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_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 erp->status = DASD_CQR_FILLED; 275 erp->retries = 10; 276 erp->lpm = LPM_ANYPATH; 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 = 0; 1721 erp->retries = 256; 1722 erp->buildclk = get_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 1911 if (sense[25] & DASD_SENSE_BIT_3) { 1912 dasd_3990_erp_alternate_path(erp); 1913 1914 if (erp->status == DASD_CQR_FAILED) { 1915 /* reset the lpm and the status to be able to 1916 * try further actions. */ 1917 1918 erp->lpm = 0; 1919 erp->status = DASD_CQR_NEED_ERP; 1920 } 1921 } 1922 1923 erp->function = dasd_3990_erp_compound_path; 1924 1925 } /* end dasd_3990_erp_compound_path */ 1926 1927 /* 1928 * DASD_3990_ERP_COMPOUND_CODE 1929 * 1930 * DESCRIPTION 1931 * Handles the compound ERP action for retry code. 1932 * 1933 * PARAMETER 1934 * sense sense data of the actual error 1935 * erp pointer to the currently created ERP 1936 * 1937 * RETURN VALUES 1938 * erp NEW ERP pointer 1939 * 1940 */ 1941 static struct dasd_ccw_req * 1942 dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense) 1943 { 1944 1945 if (sense[25] & DASD_SENSE_BIT_2) { 1946 1947 switch (sense[28]) { 1948 case 0x17: 1949 /* issue a Diagnostic Control command with an 1950 * Inhibit Write subcommand and controller modifier */ 1951 erp = dasd_3990_erp_DCTL(erp, 0x20); 1952 break; 1953 1954 case 0x25: 1955 /* wait for 5 seconds and retry again */ 1956 erp->retries = 1; 1957 1958 dasd_3990_erp_block_queue (erp, 5*HZ); 1959 break; 1960 1961 default: 1962 /* should not happen - continue */ 1963 break; 1964 } 1965 } 1966 1967 erp->function = dasd_3990_erp_compound_code; 1968 1969 return erp; 1970 1971 } /* end dasd_3990_erp_compound_code */ 1972 1973 /* 1974 * DASD_3990_ERP_COMPOUND_CONFIG 1975 * 1976 * DESCRIPTION 1977 * Handles the compound ERP action for configruation 1978 * dependent error. 1979 * Note: duplex handling is not implemented (yet). 1980 * 1981 * PARAMETER 1982 * sense sense data of the actual error 1983 * erp pointer to the currently created ERP 1984 * 1985 * RETURN VALUES 1986 * erp modified ERP pointer 1987 * 1988 */ 1989 static void 1990 dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense) 1991 { 1992 1993 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) { 1994 1995 /* set to suspended duplex state then restart 1996 internal error 05 - Set device to suspended duplex state 1997 should be done */ 1998 struct dasd_device *device = erp->startdev; 1999 dev_err(&device->cdev->dev, 2000 "An error occurred in the DASD device driver, " 2001 "reason=%s\n", "05"); 2002 2003 } 2004 2005 erp->function = dasd_3990_erp_compound_config; 2006 2007 } /* end dasd_3990_erp_compound_config */ 2008 2009 /* 2010 * DASD_3990_ERP_COMPOUND 2011 * 2012 * DESCRIPTION 2013 * Does the further compound program action if 2014 * compound retry was not successful. 2015 * 2016 * PARAMETER 2017 * sense sense data of the actual error 2018 * erp pointer to the current (failed) ERP 2019 * 2020 * RETURN VALUES 2021 * erp (additional) ERP pointer 2022 * 2023 */ 2024 static struct dasd_ccw_req * 2025 dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense) 2026 { 2027 2028 if ((erp->function == dasd_3990_erp_compound_retry) && 2029 (erp->status == DASD_CQR_NEED_ERP)) { 2030 2031 dasd_3990_erp_compound_path(erp, sense); 2032 } 2033 2034 if ((erp->function == dasd_3990_erp_compound_path) && 2035 (erp->status == DASD_CQR_NEED_ERP)) { 2036 2037 erp = dasd_3990_erp_compound_code(erp, sense); 2038 } 2039 2040 if ((erp->function == dasd_3990_erp_compound_code) && 2041 (erp->status == DASD_CQR_NEED_ERP)) { 2042 2043 dasd_3990_erp_compound_config(erp, sense); 2044 } 2045 2046 /* if no compound action ERP specified, the request failed */ 2047 if (erp->status == DASD_CQR_NEED_ERP) 2048 erp->status = DASD_CQR_FAILED; 2049 2050 return erp; 2051 2052 } /* end dasd_3990_erp_compound */ 2053 2054 /* 2055 *DASD_3990_ERP_HANDLE_SIM 2056 * 2057 *DESCRIPTION 2058 * inspects the SIM SENSE data and starts an appropriate action 2059 * 2060 * PARAMETER 2061 * sense sense data of the actual error 2062 * 2063 * RETURN VALUES 2064 * none 2065 */ 2066 void 2067 dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense) 2068 { 2069 /* print message according to log or message to operator mode */ 2070 if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) { 2071 /* print SIM SRC from RefCode */ 2072 dev_err(&device->cdev->dev, "SIM - SRC: " 2073 "%02x%02x%02x%02x\n", sense[22], 2074 sense[23], sense[11], sense[12]); 2075 } else if (sense[24] & DASD_SIM_LOG) { 2076 /* print SIM SRC Refcode */ 2077 dev_warn(&device->cdev->dev, "log SIM - SRC: " 2078 "%02x%02x%02x%02x\n", sense[22], 2079 sense[23], sense[11], sense[12]); 2080 } 2081 } 2082 2083 /* 2084 * DASD_3990_ERP_INSPECT_32 2085 * 2086 * DESCRIPTION 2087 * Does a detailed inspection of the 32 byte sense data 2088 * and sets up a related error recovery action. 2089 * 2090 * PARAMETER 2091 * sense sense data of the actual error 2092 * erp pointer to the currently created default ERP 2093 * 2094 * RETURN VALUES 2095 * erp_filled pointer to the ERP 2096 * 2097 */ 2098 static struct dasd_ccw_req * 2099 dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense) 2100 { 2101 2102 struct dasd_device *device = erp->startdev; 2103 2104 erp->function = dasd_3990_erp_inspect_32; 2105 2106 /* check for SIM sense data */ 2107 if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE) 2108 dasd_3990_erp_handle_sim(device, sense); 2109 2110 if (sense[25] & DASD_SENSE_BIT_0) { 2111 2112 /* compound program action codes (byte25 bit 0 == '1') */ 2113 dasd_3990_erp_compound_retry(erp, sense); 2114 2115 } else { 2116 2117 /* single program action codes (byte25 bit 0 == '0') */ 2118 switch (sense[25]) { 2119 2120 case 0x00: /* success - use default ERP for retries */ 2121 DBF_DEV_EVENT(DBF_DEBUG, device, "%s", 2122 "ERP called for successful request" 2123 " - just retry"); 2124 break; 2125 2126 case 0x01: /* fatal error */ 2127 dev_err(&device->cdev->dev, 2128 "ERP failed for the DASD\n"); 2129 2130 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2131 break; 2132 2133 case 0x02: /* intervention required */ 2134 case 0x03: /* intervention required during dual copy */ 2135 erp = dasd_3990_erp_int_req(erp); 2136 break; 2137 2138 case 0x0F: /* length mismatch during update write command 2139 internal error 08 - update write command error*/ 2140 dev_err(&device->cdev->dev, "An error occurred in the " 2141 "DASD device driver, reason=%s\n", "08"); 2142 2143 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2144 break; 2145 2146 case 0x10: /* logging required for other channel program */ 2147 erp = dasd_3990_erp_action_10_32(erp, sense); 2148 break; 2149 2150 case 0x15: /* next track outside defined extend 2151 internal error 07 - The next track is not 2152 within the defined storage extent */ 2153 dev_err(&device->cdev->dev, 2154 "An error occurred in the DASD device driver, " 2155 "reason=%s\n", "07"); 2156 2157 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2158 break; 2159 2160 case 0x1B: /* unexpected condition during write */ 2161 2162 erp = dasd_3990_erp_action_1B_32(erp, sense); 2163 break; 2164 2165 case 0x1C: /* invalid data */ 2166 dev_emerg(&device->cdev->dev, 2167 "Data recovered during retry with PCI " 2168 "fetch mode active\n"); 2169 2170 /* not possible to handle this situation in Linux */ 2171 panic 2172 ("Invalid data - No way to inform application " 2173 "about the possibly incorrect data"); 2174 break; 2175 2176 case 0x1D: /* state-change pending */ 2177 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2178 "A State change pending condition exists " 2179 "for the subsystem or device"); 2180 2181 erp = dasd_3990_erp_action_4(erp, sense); 2182 break; 2183 2184 case 0x1E: /* busy */ 2185 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2186 "Busy condition exists " 2187 "for the subsystem or device"); 2188 erp = dasd_3990_erp_action_4(erp, sense); 2189 break; 2190 2191 default: /* all others errors - default erp */ 2192 break; 2193 } 2194 } 2195 2196 return erp; 2197 2198 } /* end dasd_3990_erp_inspect_32 */ 2199 2200 /* 2201 ***************************************************************************** 2202 * main ERP control functions (24 and 32 byte sense) 2203 ***************************************************************************** 2204 */ 2205 2206 /* 2207 * DASD_3990_ERP_CONTROL_CHECK 2208 * 2209 * DESCRIPTION 2210 * Does a generic inspection if a control check occured and sets up 2211 * the related error recovery procedure 2212 * 2213 * PARAMETER 2214 * erp pointer to the currently created default ERP 2215 * 2216 * RETURN VALUES 2217 * erp_filled pointer to the erp 2218 */ 2219 2220 static struct dasd_ccw_req * 2221 dasd_3990_erp_control_check(struct dasd_ccw_req *erp) 2222 { 2223 struct dasd_device *device = erp->startdev; 2224 2225 if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK 2226 | SCHN_STAT_CHN_CTRL_CHK)) { 2227 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2228 "channel or interface control check"); 2229 erp = dasd_3990_erp_action_4(erp, NULL); 2230 } 2231 return erp; 2232 } 2233 2234 /* 2235 * DASD_3990_ERP_INSPECT 2236 * 2237 * DESCRIPTION 2238 * Does a detailed inspection for sense data by calling either 2239 * the 24-byte or the 32-byte inspection routine. 2240 * 2241 * PARAMETER 2242 * erp pointer to the currently created default ERP 2243 * RETURN VALUES 2244 * erp_new contens was possibly modified 2245 */ 2246 static struct dasd_ccw_req * 2247 dasd_3990_erp_inspect(struct dasd_ccw_req *erp) 2248 { 2249 2250 struct dasd_ccw_req *erp_new = NULL; 2251 char *sense; 2252 2253 /* if this problem occured on an alias retry on base */ 2254 erp_new = dasd_3990_erp_inspect_alias(erp); 2255 if (erp_new) 2256 return erp_new; 2257 2258 /* sense data are located in the refers record of the 2259 * already set up new ERP ! 2260 * check if concurrent sens is available 2261 */ 2262 sense = dasd_get_sense(&erp->refers->irb); 2263 if (!sense) 2264 erp_new = dasd_3990_erp_control_check(erp); 2265 /* distinguish between 24 and 32 byte sense data */ 2266 else if (sense[27] & DASD_SENSE_BIT_0) { 2267 2268 /* inspect the 24 byte sense data */ 2269 erp_new = dasd_3990_erp_inspect_24(erp, sense); 2270 2271 } else { 2272 2273 /* inspect the 32 byte sense data */ 2274 erp_new = dasd_3990_erp_inspect_32(erp, sense); 2275 2276 } /* end distinguish between 24 and 32 byte sense data */ 2277 2278 return erp_new; 2279 } 2280 2281 /* 2282 * DASD_3990_ERP_ADD_ERP 2283 * 2284 * DESCRIPTION 2285 * This funtion adds an additional request block (ERP) to the head of 2286 * the given cqr (or erp). 2287 * For a command mode cqr the erp is initialized as an default erp 2288 * (retry TIC). 2289 * For transport mode we make a copy of the original TCW (points to 2290 * the original TCCB, TIDALs, etc.) but give it a fresh 2291 * TSB so the original sense data will not be changed. 2292 * 2293 * PARAMETER 2294 * cqr head of the current ERP-chain (or single cqr if 2295 * first error) 2296 * RETURN VALUES 2297 * erp pointer to new ERP-chain head 2298 */ 2299 static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr) 2300 { 2301 2302 struct dasd_device *device = cqr->startdev; 2303 struct ccw1 *ccw; 2304 struct dasd_ccw_req *erp; 2305 int cplength, datasize; 2306 struct tcw *tcw; 2307 struct tsb *tsb; 2308 2309 if (cqr->cpmode == 1) { 2310 cplength = 0; 2311 /* TCW needs to be 64 byte aligned, so leave enough room */ 2312 datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb); 2313 } else { 2314 cplength = 2; 2315 datasize = 0; 2316 } 2317 2318 /* allocate additional request block */ 2319 erp = dasd_alloc_erp_request((char *) &cqr->magic, 2320 cplength, datasize, device); 2321 if (IS_ERR(erp)) { 2322 if (cqr->retries <= 0) { 2323 DBF_DEV_EVENT(DBF_ERR, device, "%s", 2324 "Unable to allocate ERP request"); 2325 cqr->status = DASD_CQR_FAILED; 2326 cqr->stopclk = get_clock (); 2327 } else { 2328 DBF_DEV_EVENT(DBF_ERR, device, 2329 "Unable to allocate ERP request " 2330 "(%i retries left)", 2331 cqr->retries); 2332 dasd_block_set_timer(device->block, (HZ << 3)); 2333 } 2334 return erp; 2335 } 2336 2337 ccw = cqr->cpaddr; 2338 if (cqr->cpmode == 1) { 2339 /* make a shallow copy of the original tcw but set new tsb */ 2340 erp->cpmode = 1; 2341 erp->cpaddr = PTR_ALIGN(erp->data, 64); 2342 tcw = erp->cpaddr; 2343 tsb = (struct tsb *) &tcw[1]; 2344 *tcw = *((struct tcw *)cqr->cpaddr); 2345 tcw->tsb = (long)tsb; 2346 } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) { 2347 /* PSF cannot be chained from NOOP/TIC */ 2348 erp->cpaddr = cqr->cpaddr; 2349 } else { 2350 /* initialize request with default TIC to current ERP/CQR */ 2351 ccw = erp->cpaddr; 2352 ccw->cmd_code = CCW_CMD_NOOP; 2353 ccw->flags = CCW_FLAG_CC; 2354 ccw++; 2355 ccw->cmd_code = CCW_CMD_TIC; 2356 ccw->cda = (long)(cqr->cpaddr); 2357 } 2358 2359 erp->flags = cqr->flags; 2360 erp->function = dasd_3990_erp_add_erp; 2361 erp->refers = cqr; 2362 erp->startdev = device; 2363 erp->memdev = device; 2364 erp->block = cqr->block; 2365 erp->magic = cqr->magic; 2366 erp->expires = 0; 2367 erp->retries = 256; 2368 erp->buildclk = get_clock(); 2369 erp->status = DASD_CQR_FILLED; 2370 2371 return erp; 2372 } 2373 2374 /* 2375 * DASD_3990_ERP_ADDITIONAL_ERP 2376 * 2377 * DESCRIPTION 2378 * An additional ERP is needed to handle the current error. 2379 * Add ERP to the head of the ERP-chain containing the ERP processing 2380 * determined based on the sense data. 2381 * 2382 * PARAMETER 2383 * cqr head of the current ERP-chain (or single cqr if 2384 * first error) 2385 * 2386 * RETURN VALUES 2387 * erp pointer to new ERP-chain head 2388 */ 2389 static struct dasd_ccw_req * 2390 dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr) 2391 { 2392 2393 struct dasd_ccw_req *erp = NULL; 2394 2395 /* add erp and initialize with default TIC */ 2396 erp = dasd_3990_erp_add_erp(cqr); 2397 2398 if (IS_ERR(erp)) 2399 return erp; 2400 2401 /* inspect sense, determine specific ERP if possible */ 2402 if (erp != cqr) { 2403 2404 erp = dasd_3990_erp_inspect(erp); 2405 } 2406 2407 return erp; 2408 2409 } /* end dasd_3990_erp_additional_erp */ 2410 2411 /* 2412 * DASD_3990_ERP_ERROR_MATCH 2413 * 2414 * DESCRIPTION 2415 * Check if the device status of the given cqr is the same. 2416 * This means that the failed CCW and the relevant sense data 2417 * must match. 2418 * I don't distinguish between 24 and 32 byte sense because in case of 2419 * 24 byte sense byte 25 and 27 is set as well. 2420 * 2421 * PARAMETER 2422 * cqr1 first cqr, which will be compared with the 2423 * cqr2 second cqr. 2424 * 2425 * RETURN VALUES 2426 * match 'boolean' for match found 2427 * returns 1 if match found, otherwise 0. 2428 */ 2429 static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, 2430 struct dasd_ccw_req *cqr2) 2431 { 2432 char *sense1, *sense2; 2433 2434 if (cqr1->startdev != cqr2->startdev) 2435 return 0; 2436 2437 sense1 = dasd_get_sense(&cqr1->irb); 2438 sense2 = dasd_get_sense(&cqr2->irb); 2439 2440 /* one request has sense data, the other not -> no match, return 0 */ 2441 if (!sense1 != !sense2) 2442 return 0; 2443 /* no sense data in both cases -> check cstat for IFCC */ 2444 if (!sense1 && !sense2) { 2445 if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | 2446 SCHN_STAT_CHN_CTRL_CHK)) == 2447 (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | 2448 SCHN_STAT_CHN_CTRL_CHK))) 2449 return 1; /* match with ifcc*/ 2450 } 2451 /* check sense data; byte 0-2,25,27 */ 2452 if (!(sense1 && sense2 && 2453 (memcmp(sense1, sense2, 3) == 0) && 2454 (sense1[27] == sense2[27]) && 2455 (sense1[25] == sense2[25]))) { 2456 2457 return 0; /* sense doesn't match */ 2458 } 2459 2460 return 1; /* match */ 2461 2462 } /* end dasd_3990_erp_error_match */ 2463 2464 /* 2465 * DASD_3990_ERP_IN_ERP 2466 * 2467 * DESCRIPTION 2468 * check if the current error already happened before. 2469 * quick exit if current cqr is not an ERP (cqr->refers=NULL) 2470 * 2471 * PARAMETER 2472 * cqr failed cqr (either original cqr or already an erp) 2473 * 2474 * RETURN VALUES 2475 * erp erp-pointer to the already defined error 2476 * recovery procedure OR 2477 * NULL if a 'new' error occurred. 2478 */ 2479 static struct dasd_ccw_req * 2480 dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr) 2481 { 2482 2483 struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */ 2484 *erp_match = NULL; /* save erp chain head */ 2485 int match = 0; /* 'boolean' for matching error found */ 2486 2487 if (cqr->refers == NULL) { /* return if not in erp */ 2488 return NULL; 2489 } 2490 2491 /* check the erp/cqr chain for current error */ 2492 do { 2493 match = dasd_3990_erp_error_match(erp_head, cqr->refers); 2494 erp_match = cqr; /* save possible matching erp */ 2495 cqr = cqr->refers; /* check next erp/cqr in queue */ 2496 2497 } while ((cqr->refers != NULL) && (!match)); 2498 2499 if (!match) { 2500 return NULL; /* no match was found */ 2501 } 2502 2503 return erp_match; /* return address of matching erp */ 2504 2505 } /* END dasd_3990_erp_in_erp */ 2506 2507 /* 2508 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense) 2509 * 2510 * DESCRIPTION 2511 * No retry is left for the current ERP. Check what has to be done 2512 * with the ERP. 2513 * - do further defined ERP action or 2514 * - wait for interrupt or 2515 * - exit with permanent error 2516 * 2517 * PARAMETER 2518 * erp ERP which is in progress with no retry left 2519 * 2520 * RETURN VALUES 2521 * erp modified/additional ERP 2522 */ 2523 static struct dasd_ccw_req * 2524 dasd_3990_erp_further_erp(struct dasd_ccw_req *erp) 2525 { 2526 2527 struct dasd_device *device = erp->startdev; 2528 char *sense = dasd_get_sense(&erp->irb); 2529 2530 /* check for 24 byte sense ERP */ 2531 if ((erp->function == dasd_3990_erp_bus_out) || 2532 (erp->function == dasd_3990_erp_action_1) || 2533 (erp->function == dasd_3990_erp_action_4)) { 2534 2535 erp = dasd_3990_erp_action_1(erp); 2536 2537 } else if (erp->function == dasd_3990_erp_action_1_sec) { 2538 erp = dasd_3990_erp_action_1_sec(erp); 2539 } else if (erp->function == dasd_3990_erp_action_5) { 2540 2541 /* retries have not been successful */ 2542 /* prepare erp for retry on different channel path */ 2543 erp = dasd_3990_erp_action_1(erp); 2544 2545 if (sense && !(sense[2] & DASD_SENSE_BIT_0)) { 2546 2547 /* issue a Diagnostic Control command with an 2548 * Inhibit Write subcommand */ 2549 2550 switch (sense[25]) { 2551 case 0x17: 2552 case 0x57:{ /* controller */ 2553 erp = dasd_3990_erp_DCTL(erp, 0x20); 2554 break; 2555 } 2556 case 0x18: 2557 case 0x58:{ /* channel path */ 2558 erp = dasd_3990_erp_DCTL(erp, 0x40); 2559 break; 2560 } 2561 case 0x19: 2562 case 0x59:{ /* storage director */ 2563 erp = dasd_3990_erp_DCTL(erp, 0x80); 2564 break; 2565 } 2566 default: 2567 DBF_DEV_EVENT(DBF_WARNING, device, 2568 "invalid subcommand modifier 0x%x " 2569 "for Diagnostic Control Command", 2570 sense[25]); 2571 } 2572 } 2573 2574 /* check for 32 byte sense ERP */ 2575 } else if (sense && 2576 ((erp->function == dasd_3990_erp_compound_retry) || 2577 (erp->function == dasd_3990_erp_compound_path) || 2578 (erp->function == dasd_3990_erp_compound_code) || 2579 (erp->function == dasd_3990_erp_compound_config))) { 2580 2581 erp = dasd_3990_erp_compound(erp, sense); 2582 2583 } else { 2584 /* 2585 * No retry left and no additional special handling 2586 * necessary 2587 */ 2588 dev_err(&device->cdev->dev, 2589 "ERP %p has run out of retries and failed\n", erp); 2590 2591 erp->status = DASD_CQR_FAILED; 2592 } 2593 2594 return erp; 2595 2596 } /* end dasd_3990_erp_further_erp */ 2597 2598 /* 2599 * DASD_3990_ERP_HANDLE_MATCH_ERP 2600 * 2601 * DESCRIPTION 2602 * An error occurred again and an ERP has been detected which is already 2603 * used to handle this error (e.g. retries). 2604 * All prior ERP's are asumed to be successful and therefore removed 2605 * from queue. 2606 * If retry counter of matching erp is already 0, it is checked if further 2607 * action is needed (besides retry) or if the ERP has failed. 2608 * 2609 * PARAMETER 2610 * erp_head first ERP in ERP-chain 2611 * erp ERP that handles the actual error. 2612 * (matching erp) 2613 * 2614 * RETURN VALUES 2615 * erp modified/additional ERP 2616 */ 2617 static struct dasd_ccw_req * 2618 dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head, 2619 struct dasd_ccw_req *erp) 2620 { 2621 2622 struct dasd_device *device = erp_head->startdev; 2623 struct dasd_ccw_req *erp_done = erp_head; /* finished req */ 2624 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */ 2625 2626 /* loop over successful ERPs and remove them from chanq */ 2627 while (erp_done != erp) { 2628 2629 if (erp_done == NULL) /* end of chain reached */ 2630 panic(PRINTK_HEADER "Programming error in ERP! The " 2631 "original request was lost\n"); 2632 2633 /* remove the request from the device queue */ 2634 list_del(&erp_done->blocklist); 2635 2636 erp_free = erp_done; 2637 erp_done = erp_done->refers; 2638 2639 /* free the finished erp request */ 2640 dasd_free_erp_request(erp_free, erp_free->memdev); 2641 2642 } /* end while */ 2643 2644 if (erp->retries > 0) { 2645 2646 char *sense = dasd_get_sense(&erp->refers->irb); 2647 2648 /* check for special retries */ 2649 if (sense && erp->function == dasd_3990_erp_action_4) { 2650 2651 erp = dasd_3990_erp_action_4(erp, sense); 2652 2653 } else if (sense && 2654 erp->function == dasd_3990_erp_action_1B_32) { 2655 2656 erp = dasd_3990_update_1B(erp, sense); 2657 2658 } else if (sense && erp->function == dasd_3990_erp_int_req) { 2659 2660 erp = dasd_3990_erp_int_req(erp); 2661 2662 } else { 2663 /* simple retry */ 2664 DBF_DEV_EVENT(DBF_DEBUG, device, 2665 "%i retries left for erp %p", 2666 erp->retries, erp); 2667 2668 /* handle the request again... */ 2669 erp->status = DASD_CQR_FILLED; 2670 } 2671 2672 } else { 2673 /* no retry left - check for further necessary action */ 2674 /* if no further actions, handle rest as permanent error */ 2675 erp = dasd_3990_erp_further_erp(erp); 2676 } 2677 2678 return erp; 2679 2680 } /* end dasd_3990_erp_handle_match_erp */ 2681 2682 /* 2683 * DASD_3990_ERP_ACTION 2684 * 2685 * DESCRIPTION 2686 * control routine for 3990 erp actions. 2687 * Has to be called with the queue lock (namely the s390_irq_lock) acquired. 2688 * 2689 * PARAMETER 2690 * cqr failed cqr (either original cqr or already an erp) 2691 * 2692 * RETURN VALUES 2693 * erp erp-pointer to the head of the ERP action chain. 2694 * This means: 2695 * - either a ptr to an additional ERP cqr or 2696 * - the original given cqr (which's status might 2697 * be modified) 2698 */ 2699 struct dasd_ccw_req * 2700 dasd_3990_erp_action(struct dasd_ccw_req * cqr) 2701 { 2702 struct dasd_ccw_req *erp = NULL; 2703 struct dasd_device *device = cqr->startdev; 2704 struct dasd_ccw_req *temp_erp = NULL; 2705 2706 if (device->features & DASD_FEATURE_ERPLOG) { 2707 /* print current erp_chain */ 2708 dev_err(&device->cdev->dev, 2709 "ERP chain at BEGINNING of ERP-ACTION\n"); 2710 for (temp_erp = cqr; 2711 temp_erp != NULL; temp_erp = temp_erp->refers) { 2712 2713 dev_err(&device->cdev->dev, 2714 "ERP %p (%02x) refers to %p\n", 2715 temp_erp, temp_erp->status, 2716 temp_erp->refers); 2717 } 2718 } 2719 2720 /* double-check if current erp/cqr was successful */ 2721 if ((scsw_cstat(&cqr->irb.scsw) == 0x00) && 2722 (scsw_dstat(&cqr->irb.scsw) == 2723 (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) { 2724 2725 DBF_DEV_EVENT(DBF_DEBUG, device, 2726 "ERP called for successful request %p" 2727 " - NO ERP necessary", cqr); 2728 2729 cqr->status = DASD_CQR_DONE; 2730 2731 return cqr; 2732 } 2733 2734 /* check if error happened before */ 2735 erp = dasd_3990_erp_in_erp(cqr); 2736 2737 if (erp == NULL) { 2738 /* no matching erp found - set up erp */ 2739 erp = dasd_3990_erp_additional_erp(cqr); 2740 if (IS_ERR(erp)) 2741 return erp; 2742 } else { 2743 /* matching erp found - set all leading erp's to DONE */ 2744 erp = dasd_3990_erp_handle_match_erp(cqr, erp); 2745 } 2746 2747 if (device->features & DASD_FEATURE_ERPLOG) { 2748 /* print current erp_chain */ 2749 dev_err(&device->cdev->dev, 2750 "ERP chain at END of ERP-ACTION\n"); 2751 for (temp_erp = erp; 2752 temp_erp != NULL; temp_erp = temp_erp->refers) { 2753 2754 dev_err(&device->cdev->dev, 2755 "ERP %p (%02x) refers to %p\n", 2756 temp_erp, temp_erp->status, 2757 temp_erp->refers); 2758 } 2759 } 2760 2761 /* enqueue ERP request if it's a new one */ 2762 if (list_empty(&erp->blocklist)) { 2763 cqr->status = DASD_CQR_IN_ERP; 2764 /* add erp request before the cqr */ 2765 list_add_tail(&erp->blocklist, &cqr->blocklist); 2766 } 2767 2768 2769 2770 return erp; 2771 2772 } /* end dasd_3990_erp_action */ 2773