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 <linux/slab.h> 14 #include <asm/idals.h> 15 16 #define PRINTK_HEADER "dasd_erp(3990): " 17 18 #include "dasd_int.h" 19 #include "dasd_eckd.h" 20 21 22 struct DCTL_data { 23 unsigned char subcommand; /* e.g Inhibit Write, Enable Write,... */ 24 unsigned char modifier; /* Subcommand modifier */ 25 unsigned short res; /* reserved */ 26 } __attribute__ ((packed)); 27 28 /* 29 ***************************************************************************** 30 * SECTION ERP HANDLING 31 ***************************************************************************** 32 */ 33 /* 34 ***************************************************************************** 35 * 24 and 32 byte sense ERP functions 36 ***************************************************************************** 37 */ 38 39 /* 40 * DASD_3990_ERP_CLEANUP 41 * 42 * DESCRIPTION 43 * Removes the already build but not necessary ERP request and sets 44 * the status of the original cqr / erp to the given (final) status 45 * 46 * PARAMETER 47 * erp request to be blocked 48 * final_status either DASD_CQR_DONE or DASD_CQR_FAILED 49 * 50 * RETURN VALUES 51 * cqr original cqr 52 */ 53 static struct dasd_ccw_req * 54 dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status) 55 { 56 struct dasd_ccw_req *cqr = erp->refers; 57 58 dasd_free_erp_request(erp, erp->memdev); 59 cqr->status = final_status; 60 return cqr; 61 62 } /* end dasd_3990_erp_cleanup */ 63 64 /* 65 * DASD_3990_ERP_BLOCK_QUEUE 66 * 67 * DESCRIPTION 68 * Block the given device request queue to prevent from further 69 * processing until the started timer has expired or an related 70 * interrupt was received. 71 */ 72 static void dasd_3990_erp_block_queue(struct dasd_ccw_req *erp, int expires) 73 { 74 75 struct dasd_device *device = erp->startdev; 76 unsigned long flags; 77 78 DBF_DEV_EVENT(DBF_INFO, device, 79 "blocking request queue for %is", expires/HZ); 80 81 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 82 dasd_device_set_stop_bits(device, DASD_STOPPED_PENDING); 83 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 84 erp->status = DASD_CQR_FILLED; 85 if (erp->block) 86 dasd_block_set_timer(erp->block, expires); 87 else 88 dasd_device_set_timer(device, expires); 89 } 90 91 /* 92 * DASD_3990_ERP_INT_REQ 93 * 94 * DESCRIPTION 95 * Handles 'Intervention Required' error. 96 * This means either device offline or not installed. 97 * 98 * PARAMETER 99 * erp current erp 100 * RETURN VALUES 101 * erp modified erp 102 */ 103 static struct dasd_ccw_req * 104 dasd_3990_erp_int_req(struct dasd_ccw_req * erp) 105 { 106 107 struct dasd_device *device = erp->startdev; 108 109 /* first time set initial retry counter and erp_function */ 110 /* and retry once without blocking queue */ 111 /* (this enables easier enqueing of the cqr) */ 112 if (erp->function != dasd_3990_erp_int_req) { 113 114 erp->retries = 256; 115 erp->function = dasd_3990_erp_int_req; 116 117 } else { 118 119 /* issue a message and wait for 'device ready' interrupt */ 120 dev_err(&device->cdev->dev, 121 "is offline or not installed - " 122 "INTERVENTION REQUIRED!!\n"); 123 124 dasd_3990_erp_block_queue(erp, 60*HZ); 125 } 126 127 return erp; 128 129 } /* end dasd_3990_erp_int_req */ 130 131 /* 132 * DASD_3990_ERP_ALTERNATE_PATH 133 * 134 * DESCRIPTION 135 * Repeat the operation on a different channel path. 136 * If all alternate paths have been tried, the request is posted with a 137 * permanent error. 138 * 139 * PARAMETER 140 * erp pointer to the current ERP 141 * 142 * RETURN VALUES 143 * erp modified pointer to the ERP 144 */ 145 static void 146 dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp) 147 { 148 struct dasd_device *device = erp->startdev; 149 __u8 opm; 150 unsigned long flags; 151 152 /* try alternate valid path */ 153 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 154 opm = ccw_device_get_path_mask(device->cdev); 155 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 156 //FIXME: start with get_opm ? 157 if (erp->lpm == 0) 158 erp->lpm = LPM_ANYPATH & ~(erp->irb.esw.esw0.sublog.lpum); 159 else 160 erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum); 161 162 if ((erp->lpm & opm) != 0x00) { 163 164 DBF_DEV_EVENT(DBF_WARNING, device, 165 "try alternate lpm=%x (lpum=%x / opm=%x)", 166 erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm); 167 168 /* reset status to submit the request again... */ 169 erp->status = DASD_CQR_FILLED; 170 erp->retries = 10; 171 } else { 172 dev_err(&device->cdev->dev, 173 "The DASD cannot be reached on any path (lpum=%x" 174 "/opm=%x)\n", erp->irb.esw.esw0.sublog.lpum, opm); 175 176 /* post request with permanent error */ 177 erp->status = DASD_CQR_FAILED; 178 } 179 } /* end dasd_3990_erp_alternate_path */ 180 181 /* 182 * DASD_3990_ERP_DCTL 183 * 184 * DESCRIPTION 185 * Setup cqr to do the Diagnostic Control (DCTL) command with an 186 * Inhibit Write subcommand (0x20) and the given modifier. 187 * 188 * PARAMETER 189 * erp pointer to the current (failed) ERP 190 * modifier subcommand modifier 191 * 192 * RETURN VALUES 193 * dctl_cqr pointer to NEW dctl_cqr 194 * 195 */ 196 static struct dasd_ccw_req * 197 dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier) 198 { 199 200 struct dasd_device *device = erp->startdev; 201 struct DCTL_data *DCTL_data; 202 struct ccw1 *ccw; 203 struct dasd_ccw_req *dctl_cqr; 204 205 dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1, 206 sizeof(struct DCTL_data), 207 device); 208 if (IS_ERR(dctl_cqr)) { 209 dev_err(&device->cdev->dev, 210 "Unable to allocate DCTL-CQR\n"); 211 erp->status = DASD_CQR_FAILED; 212 return erp; 213 } 214 215 DCTL_data = dctl_cqr->data; 216 217 DCTL_data->subcommand = 0x02; /* Inhibit Write */ 218 DCTL_data->modifier = modifier; 219 220 ccw = dctl_cqr->cpaddr; 221 memset(ccw, 0, sizeof(struct ccw1)); 222 ccw->cmd_code = CCW_CMD_DCTL; 223 ccw->count = 4; 224 ccw->cda = (__u32)(addr_t) DCTL_data; 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 { 1049 /* fatal error - set status to FAILED 1050 internal error 09 - Command Reject */ 1051 dev_err(&device->cdev->dev, "An error occurred in the DASD " 1052 "device driver, reason=%s\n", "09"); 1053 1054 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1055 } 1056 1057 return erp; 1058 1059 } /* end dasd_3990_erp_com_rej */ 1060 1061 /* 1062 * DASD_3990_ERP_BUS_OUT 1063 * 1064 * DESCRIPTION 1065 * Handles 24 byte 'Bus Out Parity Check' error. 1066 * 1067 * PARAMETER 1068 * erp current erp_head 1069 * RETURN VALUES 1070 * erp new erp_head - pointer to new ERP 1071 */ 1072 static struct dasd_ccw_req * 1073 dasd_3990_erp_bus_out(struct dasd_ccw_req * erp) 1074 { 1075 1076 struct dasd_device *device = erp->startdev; 1077 1078 /* first time set initial retry counter and erp_function */ 1079 /* and retry once without blocking queue */ 1080 /* (this enables easier enqueing of the cqr) */ 1081 if (erp->function != dasd_3990_erp_bus_out) { 1082 erp->retries = 256; 1083 erp->function = dasd_3990_erp_bus_out; 1084 1085 } else { 1086 1087 /* issue a message and wait for 'device ready' interrupt */ 1088 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1089 "bus out parity error or BOPC requested by " 1090 "channel"); 1091 1092 dasd_3990_erp_block_queue(erp, 60*HZ); 1093 1094 } 1095 1096 return erp; 1097 1098 } /* end dasd_3990_erp_bus_out */ 1099 1100 /* 1101 * DASD_3990_ERP_EQUIP_CHECK 1102 * 1103 * DESCRIPTION 1104 * Handles 24 byte 'Equipment Check' error. 1105 * 1106 * PARAMETER 1107 * erp current erp_head 1108 * RETURN VALUES 1109 * erp new erp_head - pointer to new ERP 1110 */ 1111 static struct dasd_ccw_req * 1112 dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense) 1113 { 1114 1115 struct dasd_device *device = erp->startdev; 1116 1117 erp->function = dasd_3990_erp_equip_check; 1118 1119 if (sense[1] & SNS1_WRITE_INHIBITED) { 1120 dev_info(&device->cdev->dev, 1121 "Write inhibited path encountered\n"); 1122 1123 /* vary path offline 1124 internal error 04 - Path should be varied off-line.*/ 1125 dev_err(&device->cdev->dev, "An error occurred in the DASD " 1126 "device driver, reason=%s\n", "04"); 1127 1128 erp = dasd_3990_erp_action_1(erp); 1129 1130 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1131 1132 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1133 "Equipment Check - " "environmental data present"); 1134 1135 dasd_3990_handle_env_data(erp, sense); 1136 1137 erp = dasd_3990_erp_action_4(erp, sense); 1138 1139 } else if (sense[1] & SNS1_PERM_ERR) { 1140 1141 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1142 "Equipment Check - retry exhausted or " 1143 "undesirable"); 1144 1145 erp = dasd_3990_erp_action_1(erp); 1146 1147 } else { 1148 /* all other equipment checks - Action 5 */ 1149 /* rest is done when retries == 0 */ 1150 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1151 "Equipment check or processing error"); 1152 1153 erp = dasd_3990_erp_action_5(erp); 1154 } 1155 return erp; 1156 1157 } /* end dasd_3990_erp_equip_check */ 1158 1159 /* 1160 * DASD_3990_ERP_DATA_CHECK 1161 * 1162 * DESCRIPTION 1163 * Handles 24 byte 'Data Check' error. 1164 * 1165 * PARAMETER 1166 * erp current erp_head 1167 * RETURN VALUES 1168 * erp new erp_head - pointer to new ERP 1169 */ 1170 static struct dasd_ccw_req * 1171 dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense) 1172 { 1173 1174 struct dasd_device *device = erp->startdev; 1175 1176 erp->function = dasd_3990_erp_data_check; 1177 1178 if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */ 1179 1180 /* issue message that the data has been corrected */ 1181 dev_emerg(&device->cdev->dev, 1182 "Data recovered during retry with PCI " 1183 "fetch mode active\n"); 1184 1185 /* not possible to handle this situation in Linux */ 1186 panic("No way to inform application about the possibly " 1187 "incorrect data"); 1188 1189 } else if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1190 1191 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1192 "Uncorrectable data check recovered secondary " 1193 "addr of duplex pair"); 1194 1195 erp = dasd_3990_erp_action_4(erp, sense); 1196 1197 } else if (sense[1] & SNS1_PERM_ERR) { 1198 1199 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1200 "Uncorrectable data check with internal " 1201 "retry exhausted"); 1202 1203 erp = dasd_3990_erp_action_1(erp); 1204 1205 } else { 1206 /* all other data checks */ 1207 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1208 "Uncorrectable data check with retry count " 1209 "exhausted..."); 1210 1211 erp = dasd_3990_erp_action_5(erp); 1212 } 1213 1214 return erp; 1215 1216 } /* end dasd_3990_erp_data_check */ 1217 1218 /* 1219 * DASD_3990_ERP_OVERRUN 1220 * 1221 * DESCRIPTION 1222 * Handles 24 byte 'Overrun' error. 1223 * 1224 * PARAMETER 1225 * erp current erp_head 1226 * RETURN VALUES 1227 * erp new erp_head - pointer to new ERP 1228 */ 1229 static struct dasd_ccw_req * 1230 dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense) 1231 { 1232 1233 struct dasd_device *device = erp->startdev; 1234 1235 erp->function = dasd_3990_erp_overrun; 1236 1237 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1238 "Overrun - service overrun or overrun" 1239 " error requested by channel"); 1240 1241 erp = dasd_3990_erp_action_5(erp); 1242 1243 return erp; 1244 1245 } /* end dasd_3990_erp_overrun */ 1246 1247 /* 1248 * DASD_3990_ERP_INV_FORMAT 1249 * 1250 * DESCRIPTION 1251 * Handles 24 byte 'Invalid Track Format' error. 1252 * 1253 * PARAMETER 1254 * erp current erp_head 1255 * RETURN VALUES 1256 * erp new erp_head - pointer to new ERP 1257 */ 1258 static struct dasd_ccw_req * 1259 dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense) 1260 { 1261 1262 struct dasd_device *device = erp->startdev; 1263 1264 erp->function = dasd_3990_erp_inv_format; 1265 1266 if (sense[2] & SNS2_ENV_DATA_PRESENT) { 1267 1268 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1269 "Track format error when destaging or " 1270 "staging data"); 1271 1272 dasd_3990_handle_env_data(erp, sense); 1273 1274 erp = dasd_3990_erp_action_4(erp, sense); 1275 1276 } else { 1277 /* internal error 06 - The track format is not valid*/ 1278 dev_err(&device->cdev->dev, 1279 "An error occurred in the DASD device driver, " 1280 "reason=%s\n", "06"); 1281 1282 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1283 } 1284 1285 return erp; 1286 1287 } /* end dasd_3990_erp_inv_format */ 1288 1289 /* 1290 * DASD_3990_ERP_EOC 1291 * 1292 * DESCRIPTION 1293 * Handles 24 byte 'End-of-Cylinder' error. 1294 * 1295 * PARAMETER 1296 * erp already added default erp 1297 * RETURN VALUES 1298 * erp pointer to original (failed) cqr. 1299 */ 1300 static struct dasd_ccw_req * 1301 dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense) 1302 { 1303 1304 struct dasd_device *device = default_erp->startdev; 1305 1306 dev_err(&device->cdev->dev, 1307 "The cylinder data for accessing the DASD is inconsistent\n"); 1308 1309 /* implement action 7 - BUG */ 1310 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1311 1312 } /* end dasd_3990_erp_EOC */ 1313 1314 /* 1315 * DASD_3990_ERP_ENV_DATA 1316 * 1317 * DESCRIPTION 1318 * Handles 24 byte 'Environmental-Data Present' error. 1319 * 1320 * PARAMETER 1321 * erp current erp_head 1322 * RETURN VALUES 1323 * erp new erp_head - pointer to new ERP 1324 */ 1325 static struct dasd_ccw_req * 1326 dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense) 1327 { 1328 1329 struct dasd_device *device = erp->startdev; 1330 1331 erp->function = dasd_3990_erp_env_data; 1332 1333 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Environmental data present"); 1334 1335 dasd_3990_handle_env_data(erp, sense); 1336 1337 /* don't retry on disabled interface */ 1338 if (sense[7] != 0x0F) { 1339 erp = dasd_3990_erp_action_4(erp, sense); 1340 } else { 1341 erp->status = DASD_CQR_FILLED; 1342 } 1343 1344 return erp; 1345 1346 } /* end dasd_3990_erp_env_data */ 1347 1348 /* 1349 * DASD_3990_ERP_NO_REC 1350 * 1351 * DESCRIPTION 1352 * Handles 24 byte 'No Record Found' error. 1353 * 1354 * PARAMETER 1355 * erp already added default ERP 1356 * 1357 * RETURN VALUES 1358 * erp new erp_head - pointer to new ERP 1359 */ 1360 static struct dasd_ccw_req * 1361 dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense) 1362 { 1363 1364 struct dasd_device *device = default_erp->startdev; 1365 1366 dev_err(&device->cdev->dev, 1367 "The specified record was not found\n"); 1368 1369 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1370 1371 } /* end dasd_3990_erp_no_rec */ 1372 1373 /* 1374 * DASD_3990_ERP_FILE_PROT 1375 * 1376 * DESCRIPTION 1377 * Handles 24 byte 'File Protected' error. 1378 * Note: Seek related recovery is not implemented because 1379 * wee don't use the seek command yet. 1380 * 1381 * PARAMETER 1382 * erp current erp_head 1383 * RETURN VALUES 1384 * erp new erp_head - pointer to new ERP 1385 */ 1386 static struct dasd_ccw_req * 1387 dasd_3990_erp_file_prot(struct dasd_ccw_req * erp) 1388 { 1389 1390 struct dasd_device *device = erp->startdev; 1391 1392 dev_err(&device->cdev->dev, "Accessing the DASD failed because of " 1393 "a hardware error\n"); 1394 1395 return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1396 1397 } /* end dasd_3990_erp_file_prot */ 1398 1399 /* 1400 * DASD_3990_ERP_INSPECT_ALIAS 1401 * 1402 * DESCRIPTION 1403 * Checks if the original request was started on an alias device. 1404 * If yes, it modifies the original and the erp request so that 1405 * the erp request can be started on a base device. 1406 * 1407 * PARAMETER 1408 * erp pointer to the currently created default ERP 1409 * 1410 * RETURN VALUES 1411 * erp pointer to the modified ERP, or NULL 1412 */ 1413 1414 static struct dasd_ccw_req *dasd_3990_erp_inspect_alias( 1415 struct dasd_ccw_req *erp) 1416 { 1417 struct dasd_ccw_req *cqr = erp->refers; 1418 1419 if (cqr->block && 1420 (cqr->block->base != cqr->startdev)) { 1421 if (cqr->startdev->features & DASD_FEATURE_ERPLOG) { 1422 DBF_DEV_EVENT(DBF_ERR, cqr->startdev, 1423 "ERP on alias device for request %p," 1424 " recover on base device %s", cqr, 1425 dev_name(&cqr->block->base->cdev->dev)); 1426 } 1427 dasd_eckd_reset_ccw_to_base_io(cqr); 1428 erp->startdev = cqr->block->base; 1429 erp->function = dasd_3990_erp_inspect_alias; 1430 return erp; 1431 } else 1432 return NULL; 1433 } 1434 1435 1436 /* 1437 * DASD_3990_ERP_INSPECT_24 1438 * 1439 * DESCRIPTION 1440 * Does a detailed inspection of the 24 byte sense data 1441 * and sets up a related error recovery action. 1442 * 1443 * PARAMETER 1444 * sense sense data of the actual error 1445 * erp pointer to the currently created default ERP 1446 * 1447 * RETURN VALUES 1448 * erp pointer to the (addtitional) ERP 1449 */ 1450 static struct dasd_ccw_req * 1451 dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense) 1452 { 1453 1454 struct dasd_ccw_req *erp_filled = NULL; 1455 1456 /* Check sense for .... */ 1457 /* 'Command Reject' */ 1458 if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) { 1459 erp_filled = dasd_3990_erp_com_rej(erp, sense); 1460 } 1461 /* 'Intervention Required' */ 1462 if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) { 1463 erp_filled = dasd_3990_erp_int_req(erp); 1464 } 1465 /* 'Bus Out Parity Check' */ 1466 if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) { 1467 erp_filled = dasd_3990_erp_bus_out(erp); 1468 } 1469 /* 'Equipment Check' */ 1470 if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) { 1471 erp_filled = dasd_3990_erp_equip_check(erp, sense); 1472 } 1473 /* 'Data Check' */ 1474 if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) { 1475 erp_filled = dasd_3990_erp_data_check(erp, sense); 1476 } 1477 /* 'Overrun' */ 1478 if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) { 1479 erp_filled = dasd_3990_erp_overrun(erp, sense); 1480 } 1481 /* 'Invalid Track Format' */ 1482 if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) { 1483 erp_filled = dasd_3990_erp_inv_format(erp, sense); 1484 } 1485 /* 'End-of-Cylinder' */ 1486 if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) { 1487 erp_filled = dasd_3990_erp_EOC(erp, sense); 1488 } 1489 /* 'Environmental Data' */ 1490 if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) { 1491 erp_filled = dasd_3990_erp_env_data(erp, sense); 1492 } 1493 /* 'No Record Found' */ 1494 if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) { 1495 erp_filled = dasd_3990_erp_no_rec(erp, sense); 1496 } 1497 /* 'File Protected' */ 1498 if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) { 1499 erp_filled = dasd_3990_erp_file_prot(erp); 1500 } 1501 /* other (unknown) error - do default ERP */ 1502 if (erp_filled == NULL) { 1503 1504 erp_filled = erp; 1505 } 1506 1507 return erp_filled; 1508 1509 } /* END dasd_3990_erp_inspect_24 */ 1510 1511 /* 1512 ***************************************************************************** 1513 * 32 byte sense ERP functions (only) 1514 ***************************************************************************** 1515 */ 1516 1517 /* 1518 * DASD_3990_ERPACTION_10_32 1519 * 1520 * DESCRIPTION 1521 * Handles 32 byte 'Action 10' of Single Program Action Codes. 1522 * Just retry and if retry doesn't work, return with error. 1523 * 1524 * PARAMETER 1525 * erp current erp_head 1526 * sense current sense data 1527 * RETURN VALUES 1528 * erp modified erp_head 1529 */ 1530 static struct dasd_ccw_req * 1531 dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense) 1532 { 1533 1534 struct dasd_device *device = erp->startdev; 1535 1536 erp->retries = 256; 1537 erp->function = dasd_3990_erp_action_10_32; 1538 1539 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Perform logging requested"); 1540 1541 return erp; 1542 1543 } /* end dasd_3990_erp_action_10_32 */ 1544 1545 /* 1546 * DASD_3990_ERP_ACTION_1B_32 1547 * 1548 * DESCRIPTION 1549 * Handles 32 byte 'Action 1B' of Single Program Action Codes. 1550 * A write operation could not be finished because of an unexpected 1551 * condition. 1552 * The already created 'default erp' is used to get the link to 1553 * the erp chain, but it can not be used for this recovery 1554 * action because it contains no DE/LO data space. 1555 * 1556 * PARAMETER 1557 * default_erp already added default erp. 1558 * sense current sense data 1559 * 1560 * RETURN VALUES 1561 * erp new erp or 1562 * default_erp in case of imprecise ending or error 1563 */ 1564 static struct dasd_ccw_req * 1565 dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) 1566 { 1567 1568 struct dasd_device *device = default_erp->startdev; 1569 __u32 cpa = 0; 1570 struct dasd_ccw_req *cqr; 1571 struct dasd_ccw_req *erp; 1572 struct DE_eckd_data *DE_data; 1573 struct PFX_eckd_data *PFX_data; 1574 char *LO_data; /* LO_eckd_data_t */ 1575 struct ccw1 *ccw, *oldccw; 1576 1577 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1578 "Write not finished because of unexpected condition"); 1579 1580 default_erp->function = dasd_3990_erp_action_1B_32; 1581 1582 /* determine the original cqr */ 1583 cqr = default_erp; 1584 1585 while (cqr->refers != NULL) { 1586 cqr = cqr->refers; 1587 } 1588 1589 if (scsw_is_tm(&cqr->irb.scsw)) { 1590 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1591 "32 bit sense, action 1B is not defined" 1592 " in transport mode - just retry"); 1593 return default_erp; 1594 } 1595 1596 /* for imprecise ending just do default erp */ 1597 if (sense[1] & 0x01) { 1598 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1599 "Imprecise ending is set - just retry"); 1600 1601 return default_erp; 1602 } 1603 1604 /* determine the address of the CCW to be restarted */ 1605 /* Imprecise ending is not set -> addr from IRB-SCSW */ 1606 cpa = default_erp->refers->irb.scsw.cmd.cpa; 1607 1608 if (cpa == 0) { 1609 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1610 "Unable to determine address of the CCW " 1611 "to be restarted"); 1612 1613 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1614 } 1615 1616 /* Build new ERP request including DE/LO */ 1617 erp = dasd_alloc_erp_request((char *) &cqr->magic, 1618 2 + 1,/* DE/LO + TIC */ 1619 sizeof(struct DE_eckd_data) + 1620 sizeof(struct LO_eckd_data), device); 1621 1622 if (IS_ERR(erp)) { 1623 /* internal error 01 - Unable to allocate ERP */ 1624 dev_err(&device->cdev->dev, "An error occurred in the DASD " 1625 "device driver, reason=%s\n", "01"); 1626 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1627 } 1628 1629 /* use original DE */ 1630 DE_data = erp->data; 1631 oldccw = cqr->cpaddr; 1632 if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) { 1633 PFX_data = cqr->data; 1634 memcpy(DE_data, &PFX_data->define_extent, 1635 sizeof(struct DE_eckd_data)); 1636 } else 1637 memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data)); 1638 1639 /* create LO */ 1640 LO_data = erp->data + sizeof(struct DE_eckd_data); 1641 1642 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { 1643 /* should not */ 1644 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1645 } 1646 1647 if ((sense[7] & 0x3F) == 0x01) { 1648 /* operation code is WRITE DATA -> data area orientation */ 1649 LO_data[0] = 0x81; 1650 1651 } else if ((sense[7] & 0x3F) == 0x03) { 1652 /* operation code is FORMAT WRITE -> index orientation */ 1653 LO_data[0] = 0xC3; 1654 1655 } else { 1656 LO_data[0] = sense[7]; /* operation */ 1657 } 1658 1659 LO_data[1] = sense[8]; /* auxiliary */ 1660 LO_data[2] = sense[9]; 1661 LO_data[3] = sense[3]; /* count */ 1662 LO_data[4] = sense[29]; /* seek_addr.cyl */ 1663 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */ 1664 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */ 1665 1666 memcpy(&(LO_data[8]), &(sense[11]), 8); 1667 1668 /* create DE ccw */ 1669 ccw = erp->cpaddr; 1670 memset(ccw, 0, sizeof(struct ccw1)); 1671 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 1672 ccw->flags = CCW_FLAG_CC; 1673 ccw->count = 16; 1674 ccw->cda = (__u32)(addr_t) DE_data; 1675 1676 /* create LO ccw */ 1677 ccw++; 1678 memset(ccw, 0, sizeof(struct ccw1)); 1679 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 1680 ccw->flags = CCW_FLAG_CC; 1681 ccw->count = 16; 1682 ccw->cda = (__u32)(addr_t) LO_data; 1683 1684 /* TIC to the failed ccw */ 1685 ccw++; 1686 ccw->cmd_code = CCW_CMD_TIC; 1687 ccw->cda = cpa; 1688 1689 /* fill erp related fields */ 1690 erp->function = dasd_3990_erp_action_1B_32; 1691 erp->refers = default_erp->refers; 1692 erp->startdev = device; 1693 erp->memdev = device; 1694 erp->magic = default_erp->magic; 1695 erp->expires = 0; 1696 erp->retries = 256; 1697 erp->buildclk = get_clock(); 1698 erp->status = DASD_CQR_FILLED; 1699 1700 /* remove the default erp */ 1701 dasd_free_erp_request(default_erp, device); 1702 1703 return erp; 1704 1705 } /* end dasd_3990_erp_action_1B_32 */ 1706 1707 /* 1708 * DASD_3990_UPDATE_1B 1709 * 1710 * DESCRIPTION 1711 * Handles the update to the 32 byte 'Action 1B' of Single Program 1712 * Action Codes in case the first action was not successful. 1713 * The already created 'previous_erp' is the currently not successful 1714 * ERP. 1715 * 1716 * PARAMETER 1717 * previous_erp already created previous erp. 1718 * sense current sense data 1719 * RETURN VALUES 1720 * erp modified erp 1721 */ 1722 static struct dasd_ccw_req * 1723 dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense) 1724 { 1725 1726 struct dasd_device *device = previous_erp->startdev; 1727 __u32 cpa = 0; 1728 struct dasd_ccw_req *cqr; 1729 struct dasd_ccw_req *erp; 1730 char *LO_data; /* struct LO_eckd_data */ 1731 struct ccw1 *ccw; 1732 1733 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1734 "Write not finished because of unexpected condition" 1735 " - follow on"); 1736 1737 /* determine the original cqr */ 1738 cqr = previous_erp; 1739 1740 while (cqr->refers != NULL) { 1741 cqr = cqr->refers; 1742 } 1743 1744 if (scsw_is_tm(&cqr->irb.scsw)) { 1745 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1746 "32 bit sense, action 1B, update," 1747 " in transport mode - just retry"); 1748 return previous_erp; 1749 } 1750 1751 /* for imprecise ending just do default erp */ 1752 if (sense[1] & 0x01) { 1753 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 1754 "Imprecise ending is set - just retry"); 1755 1756 previous_erp->status = DASD_CQR_FILLED; 1757 1758 return previous_erp; 1759 } 1760 1761 /* determine the address of the CCW to be restarted */ 1762 /* Imprecise ending is not set -> addr from IRB-SCSW */ 1763 cpa = previous_erp->irb.scsw.cmd.cpa; 1764 1765 if (cpa == 0) { 1766 /* internal error 02 - 1767 Unable to determine address of the CCW to be restarted */ 1768 dev_err(&device->cdev->dev, "An error occurred in the DASD " 1769 "device driver, reason=%s\n", "02"); 1770 1771 previous_erp->status = DASD_CQR_FAILED; 1772 1773 return previous_erp; 1774 } 1775 1776 erp = previous_erp; 1777 1778 /* update the LO with the new returned sense data */ 1779 LO_data = erp->data + sizeof(struct DE_eckd_data); 1780 1781 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { 1782 /* should not happen */ 1783 previous_erp->status = DASD_CQR_FAILED; 1784 1785 return previous_erp; 1786 } 1787 1788 if ((sense[7] & 0x3F) == 0x01) { 1789 /* operation code is WRITE DATA -> data area orientation */ 1790 LO_data[0] = 0x81; 1791 1792 } else if ((sense[7] & 0x3F) == 0x03) { 1793 /* operation code is FORMAT WRITE -> index orientation */ 1794 LO_data[0] = 0xC3; 1795 1796 } else { 1797 LO_data[0] = sense[7]; /* operation */ 1798 } 1799 1800 LO_data[1] = sense[8]; /* auxiliary */ 1801 LO_data[2] = sense[9]; 1802 LO_data[3] = sense[3]; /* count */ 1803 LO_data[4] = sense[29]; /* seek_addr.cyl */ 1804 LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */ 1805 LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */ 1806 1807 memcpy(&(LO_data[8]), &(sense[11]), 8); 1808 1809 /* TIC to the failed ccw */ 1810 ccw = erp->cpaddr; /* addr of DE ccw */ 1811 ccw++; /* addr of LE ccw */ 1812 ccw++; /* addr of TIC ccw */ 1813 ccw->cda = cpa; 1814 1815 erp->status = DASD_CQR_FILLED; 1816 1817 return erp; 1818 1819 } /* end dasd_3990_update_1B */ 1820 1821 /* 1822 * DASD_3990_ERP_COMPOUND_RETRY 1823 * 1824 * DESCRIPTION 1825 * Handles the compound ERP action retry code. 1826 * NOTE: At least one retry is done even if zero is specified 1827 * by the sense data. This makes enqueueing of the request 1828 * easier. 1829 * 1830 * PARAMETER 1831 * sense sense data of the actual error 1832 * erp pointer to the currently created ERP 1833 * 1834 * RETURN VALUES 1835 * erp modified ERP pointer 1836 * 1837 */ 1838 static void 1839 dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense) 1840 { 1841 1842 switch (sense[25] & 0x03) { 1843 case 0x00: /* no not retry */ 1844 erp->retries = 1; 1845 break; 1846 1847 case 0x01: /* retry 2 times */ 1848 erp->retries = 2; 1849 break; 1850 1851 case 0x02: /* retry 10 times */ 1852 erp->retries = 10; 1853 break; 1854 1855 case 0x03: /* retry 256 times */ 1856 erp->retries = 256; 1857 break; 1858 1859 default: 1860 BUG(); 1861 } 1862 1863 erp->function = dasd_3990_erp_compound_retry; 1864 1865 } /* end dasd_3990_erp_compound_retry */ 1866 1867 /* 1868 * DASD_3990_ERP_COMPOUND_PATH 1869 * 1870 * DESCRIPTION 1871 * Handles the compound ERP action for retry on alternate 1872 * channel path. 1873 * 1874 * PARAMETER 1875 * sense sense data of the actual error 1876 * erp pointer to the currently created ERP 1877 * 1878 * RETURN VALUES 1879 * erp modified ERP pointer 1880 * 1881 */ 1882 static void 1883 dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense) 1884 { 1885 1886 if (sense[25] & DASD_SENSE_BIT_3) { 1887 dasd_3990_erp_alternate_path(erp); 1888 1889 if (erp->status == DASD_CQR_FAILED) { 1890 /* reset the lpm and the status to be able to 1891 * try further actions. */ 1892 1893 erp->lpm = 0; 1894 erp->status = DASD_CQR_NEED_ERP; 1895 } 1896 } 1897 1898 erp->function = dasd_3990_erp_compound_path; 1899 1900 } /* end dasd_3990_erp_compound_path */ 1901 1902 /* 1903 * DASD_3990_ERP_COMPOUND_CODE 1904 * 1905 * DESCRIPTION 1906 * Handles the compound ERP action for retry code. 1907 * 1908 * PARAMETER 1909 * sense sense data of the actual error 1910 * erp pointer to the currently created ERP 1911 * 1912 * RETURN VALUES 1913 * erp NEW ERP pointer 1914 * 1915 */ 1916 static struct dasd_ccw_req * 1917 dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense) 1918 { 1919 1920 if (sense[25] & DASD_SENSE_BIT_2) { 1921 1922 switch (sense[28]) { 1923 case 0x17: 1924 /* issue a Diagnostic Control command with an 1925 * Inhibit Write subcommand and controller modifier */ 1926 erp = dasd_3990_erp_DCTL(erp, 0x20); 1927 break; 1928 1929 case 0x25: 1930 /* wait for 5 seconds and retry again */ 1931 erp->retries = 1; 1932 1933 dasd_3990_erp_block_queue (erp, 5*HZ); 1934 break; 1935 1936 default: 1937 /* should not happen - continue */ 1938 break; 1939 } 1940 } 1941 1942 erp->function = dasd_3990_erp_compound_code; 1943 1944 return erp; 1945 1946 } /* end dasd_3990_erp_compound_code */ 1947 1948 /* 1949 * DASD_3990_ERP_COMPOUND_CONFIG 1950 * 1951 * DESCRIPTION 1952 * Handles the compound ERP action for configruation 1953 * dependent error. 1954 * Note: duplex handling is not implemented (yet). 1955 * 1956 * PARAMETER 1957 * sense sense data of the actual error 1958 * erp pointer to the currently created ERP 1959 * 1960 * RETURN VALUES 1961 * erp modified ERP pointer 1962 * 1963 */ 1964 static void 1965 dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense) 1966 { 1967 1968 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) { 1969 1970 /* set to suspended duplex state then restart 1971 internal error 05 - Set device to suspended duplex state 1972 should be done */ 1973 struct dasd_device *device = erp->startdev; 1974 dev_err(&device->cdev->dev, 1975 "An error occurred in the DASD device driver, " 1976 "reason=%s\n", "05"); 1977 1978 } 1979 1980 erp->function = dasd_3990_erp_compound_config; 1981 1982 } /* end dasd_3990_erp_compound_config */ 1983 1984 /* 1985 * DASD_3990_ERP_COMPOUND 1986 * 1987 * DESCRIPTION 1988 * Does the further compound program action if 1989 * compound retry was not successful. 1990 * 1991 * PARAMETER 1992 * sense sense data of the actual error 1993 * erp pointer to the current (failed) ERP 1994 * 1995 * RETURN VALUES 1996 * erp (additional) ERP pointer 1997 * 1998 */ 1999 static struct dasd_ccw_req * 2000 dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense) 2001 { 2002 2003 if ((erp->function == dasd_3990_erp_compound_retry) && 2004 (erp->status == DASD_CQR_NEED_ERP)) { 2005 2006 dasd_3990_erp_compound_path(erp, sense); 2007 } 2008 2009 if ((erp->function == dasd_3990_erp_compound_path) && 2010 (erp->status == DASD_CQR_NEED_ERP)) { 2011 2012 erp = dasd_3990_erp_compound_code(erp, sense); 2013 } 2014 2015 if ((erp->function == dasd_3990_erp_compound_code) && 2016 (erp->status == DASD_CQR_NEED_ERP)) { 2017 2018 dasd_3990_erp_compound_config(erp, sense); 2019 } 2020 2021 /* if no compound action ERP specified, the request failed */ 2022 if (erp->status == DASD_CQR_NEED_ERP) 2023 erp->status = DASD_CQR_FAILED; 2024 2025 return erp; 2026 2027 } /* end dasd_3990_erp_compound */ 2028 2029 /* 2030 *DASD_3990_ERP_HANDLE_SIM 2031 * 2032 *DESCRIPTION 2033 * inspects the SIM SENSE data and starts an appropriate action 2034 * 2035 * PARAMETER 2036 * sense sense data of the actual error 2037 * 2038 * RETURN VALUES 2039 * none 2040 */ 2041 void 2042 dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense) 2043 { 2044 /* print message according to log or message to operator mode */ 2045 if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) { 2046 /* print SIM SRC from RefCode */ 2047 dev_err(&device->cdev->dev, "SIM - SRC: " 2048 "%02x%02x%02x%02x\n", sense[22], 2049 sense[23], sense[11], sense[12]); 2050 } else if (sense[24] & DASD_SIM_LOG) { 2051 /* print SIM SRC Refcode */ 2052 dev_warn(&device->cdev->dev, "log SIM - SRC: " 2053 "%02x%02x%02x%02x\n", sense[22], 2054 sense[23], sense[11], sense[12]); 2055 } 2056 } 2057 2058 /* 2059 * DASD_3990_ERP_INSPECT_32 2060 * 2061 * DESCRIPTION 2062 * Does a detailed inspection of the 32 byte sense data 2063 * and sets up a related error recovery action. 2064 * 2065 * PARAMETER 2066 * sense sense data of the actual error 2067 * erp pointer to the currently created default ERP 2068 * 2069 * RETURN VALUES 2070 * erp_filled pointer to the ERP 2071 * 2072 */ 2073 static struct dasd_ccw_req * 2074 dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense) 2075 { 2076 2077 struct dasd_device *device = erp->startdev; 2078 2079 erp->function = dasd_3990_erp_inspect_32; 2080 2081 /* check for SIM sense data */ 2082 if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE) 2083 dasd_3990_erp_handle_sim(device, sense); 2084 2085 if (sense[25] & DASD_SENSE_BIT_0) { 2086 2087 /* compound program action codes (byte25 bit 0 == '1') */ 2088 dasd_3990_erp_compound_retry(erp, sense); 2089 2090 } else { 2091 2092 /* single program action codes (byte25 bit 0 == '0') */ 2093 switch (sense[25]) { 2094 2095 case 0x00: /* success - use default ERP for retries */ 2096 DBF_DEV_EVENT(DBF_DEBUG, device, "%s", 2097 "ERP called for successful request" 2098 " - just retry"); 2099 break; 2100 2101 case 0x01: /* fatal error */ 2102 dev_err(&device->cdev->dev, 2103 "ERP failed for the DASD\n"); 2104 2105 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2106 break; 2107 2108 case 0x02: /* intervention required */ 2109 case 0x03: /* intervention required during dual copy */ 2110 erp = dasd_3990_erp_int_req(erp); 2111 break; 2112 2113 case 0x0F: /* length mismatch during update write command 2114 internal error 08 - update write command error*/ 2115 dev_err(&device->cdev->dev, "An error occurred in the " 2116 "DASD device driver, reason=%s\n", "08"); 2117 2118 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2119 break; 2120 2121 case 0x10: /* logging required for other channel program */ 2122 erp = dasd_3990_erp_action_10_32(erp, sense); 2123 break; 2124 2125 case 0x15: /* next track outside defined extend 2126 internal error 07 - The next track is not 2127 within the defined storage extent */ 2128 dev_err(&device->cdev->dev, 2129 "An error occurred in the DASD device driver, " 2130 "reason=%s\n", "07"); 2131 2132 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2133 break; 2134 2135 case 0x1B: /* unexpected condition during write */ 2136 2137 erp = dasd_3990_erp_action_1B_32(erp, sense); 2138 break; 2139 2140 case 0x1C: /* invalid data */ 2141 dev_emerg(&device->cdev->dev, 2142 "Data recovered during retry with PCI " 2143 "fetch mode active\n"); 2144 2145 /* not possible to handle this situation in Linux */ 2146 panic 2147 ("Invalid data - No way to inform application " 2148 "about the possibly incorrect data"); 2149 break; 2150 2151 case 0x1D: /* state-change pending */ 2152 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2153 "A State change pending condition exists " 2154 "for the subsystem or device"); 2155 2156 erp = dasd_3990_erp_action_4(erp, sense); 2157 break; 2158 2159 case 0x1E: /* busy */ 2160 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2161 "Busy condition exists " 2162 "for the subsystem or device"); 2163 erp = dasd_3990_erp_action_4(erp, sense); 2164 break; 2165 2166 default: /* all others errors - default erp */ 2167 break; 2168 } 2169 } 2170 2171 return erp; 2172 2173 } /* end dasd_3990_erp_inspect_32 */ 2174 2175 /* 2176 ***************************************************************************** 2177 * main ERP control fuctions (24 and 32 byte sense) 2178 ***************************************************************************** 2179 */ 2180 2181 /* 2182 * DASD_3990_ERP_CONTROL_CHECK 2183 * 2184 * DESCRIPTION 2185 * Does a generic inspection if a control check occured and sets up 2186 * the related error recovery procedure 2187 * 2188 * PARAMETER 2189 * erp pointer to the currently created default ERP 2190 * 2191 * RETURN VALUES 2192 * erp_filled pointer to the erp 2193 */ 2194 2195 static struct dasd_ccw_req * 2196 dasd_3990_erp_control_check(struct dasd_ccw_req *erp) 2197 { 2198 struct dasd_device *device = erp->startdev; 2199 2200 if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK 2201 | SCHN_STAT_CHN_CTRL_CHK)) { 2202 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2203 "channel or interface control check"); 2204 erp = dasd_3990_erp_action_4(erp, NULL); 2205 } 2206 return erp; 2207 } 2208 2209 /* 2210 * DASD_3990_ERP_INSPECT 2211 * 2212 * DESCRIPTION 2213 * Does a detailed inspection for sense data by calling either 2214 * the 24-byte or the 32-byte inspection routine. 2215 * 2216 * PARAMETER 2217 * erp pointer to the currently created default ERP 2218 * RETURN VALUES 2219 * erp_new contens was possibly modified 2220 */ 2221 static struct dasd_ccw_req * 2222 dasd_3990_erp_inspect(struct dasd_ccw_req *erp) 2223 { 2224 2225 struct dasd_ccw_req *erp_new = NULL; 2226 char *sense; 2227 2228 /* if this problem occured on an alias retry on base */ 2229 erp_new = dasd_3990_erp_inspect_alias(erp); 2230 if (erp_new) 2231 return erp_new; 2232 2233 /* sense data are located in the refers record of the 2234 * already set up new ERP ! 2235 * check if concurrent sens is available 2236 */ 2237 sense = dasd_get_sense(&erp->refers->irb); 2238 if (!sense) 2239 erp_new = dasd_3990_erp_control_check(erp); 2240 /* distinguish between 24 and 32 byte sense data */ 2241 else if (sense[27] & DASD_SENSE_BIT_0) { 2242 2243 /* inspect the 24 byte sense data */ 2244 erp_new = dasd_3990_erp_inspect_24(erp, sense); 2245 2246 } else { 2247 2248 /* inspect the 32 byte sense data */ 2249 erp_new = dasd_3990_erp_inspect_32(erp, sense); 2250 2251 } /* end distinguish between 24 and 32 byte sense data */ 2252 2253 return erp_new; 2254 } 2255 2256 /* 2257 * DASD_3990_ERP_ADD_ERP 2258 * 2259 * DESCRIPTION 2260 * This funtion adds an additional request block (ERP) to the head of 2261 * the given cqr (or erp). 2262 * For a command mode cqr the erp is initialized as an default erp 2263 * (retry TIC). 2264 * For transport mode we make a copy of the original TCW (points to 2265 * the original TCCB, TIDALs, etc.) but give it a fresh 2266 * TSB so the original sense data will not be changed. 2267 * 2268 * PARAMETER 2269 * cqr head of the current ERP-chain (or single cqr if 2270 * first error) 2271 * RETURN VALUES 2272 * erp pointer to new ERP-chain head 2273 */ 2274 static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr) 2275 { 2276 2277 struct dasd_device *device = cqr->startdev; 2278 struct ccw1 *ccw; 2279 struct dasd_ccw_req *erp; 2280 int cplength, datasize; 2281 struct tcw *tcw; 2282 struct tsb *tsb; 2283 2284 if (cqr->cpmode == 1) { 2285 cplength = 0; 2286 datasize = sizeof(struct tcw) + sizeof(struct tsb); 2287 } else { 2288 cplength = 2; 2289 datasize = 0; 2290 } 2291 2292 /* allocate additional request block */ 2293 erp = dasd_alloc_erp_request((char *) &cqr->magic, 2294 cplength, datasize, device); 2295 if (IS_ERR(erp)) { 2296 if (cqr->retries <= 0) { 2297 DBF_DEV_EVENT(DBF_ERR, device, "%s", 2298 "Unable to allocate ERP request"); 2299 cqr->status = DASD_CQR_FAILED; 2300 cqr->stopclk = get_clock (); 2301 } else { 2302 DBF_DEV_EVENT(DBF_ERR, device, 2303 "Unable to allocate ERP request " 2304 "(%i retries left)", 2305 cqr->retries); 2306 dasd_block_set_timer(device->block, (HZ << 3)); 2307 } 2308 return cqr; 2309 } 2310 2311 ccw = cqr->cpaddr; 2312 if (cqr->cpmode == 1) { 2313 /* make a shallow copy of the original tcw but set new tsb */ 2314 erp->cpmode = 1; 2315 erp->cpaddr = erp->data; 2316 tcw = erp->data; 2317 tsb = (struct tsb *) &tcw[1]; 2318 *tcw = *((struct tcw *)cqr->cpaddr); 2319 tcw->tsb = (long)tsb; 2320 } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) { 2321 /* PSF cannot be chained from NOOP/TIC */ 2322 erp->cpaddr = cqr->cpaddr; 2323 } else { 2324 /* initialize request with default TIC to current ERP/CQR */ 2325 ccw = erp->cpaddr; 2326 ccw->cmd_code = CCW_CMD_NOOP; 2327 ccw->flags = CCW_FLAG_CC; 2328 ccw++; 2329 ccw->cmd_code = CCW_CMD_TIC; 2330 ccw->cda = (long)(cqr->cpaddr); 2331 } 2332 2333 erp->function = dasd_3990_erp_add_erp; 2334 erp->refers = cqr; 2335 erp->startdev = device; 2336 erp->memdev = device; 2337 erp->block = cqr->block; 2338 erp->magic = cqr->magic; 2339 erp->expires = 0; 2340 erp->retries = 256; 2341 erp->buildclk = get_clock(); 2342 erp->status = DASD_CQR_FILLED; 2343 2344 return erp; 2345 } 2346 2347 /* 2348 * DASD_3990_ERP_ADDITIONAL_ERP 2349 * 2350 * DESCRIPTION 2351 * An additional ERP is needed to handle the current error. 2352 * Add ERP to the head of the ERP-chain containing the ERP processing 2353 * determined based on the sense data. 2354 * 2355 * PARAMETER 2356 * cqr head of the current ERP-chain (or single cqr if 2357 * first error) 2358 * 2359 * RETURN VALUES 2360 * erp pointer to new ERP-chain head 2361 */ 2362 static struct dasd_ccw_req * 2363 dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr) 2364 { 2365 2366 struct dasd_ccw_req *erp = NULL; 2367 2368 /* add erp and initialize with default TIC */ 2369 erp = dasd_3990_erp_add_erp(cqr); 2370 2371 /* inspect sense, determine specific ERP if possible */ 2372 if (erp != cqr) { 2373 2374 erp = dasd_3990_erp_inspect(erp); 2375 } 2376 2377 return erp; 2378 2379 } /* end dasd_3990_erp_additional_erp */ 2380 2381 /* 2382 * DASD_3990_ERP_ERROR_MATCH 2383 * 2384 * DESCRIPTION 2385 * Check if the device status of the given cqr is the same. 2386 * This means that the failed CCW and the relevant sense data 2387 * must match. 2388 * I don't distinguish between 24 and 32 byte sense because in case of 2389 * 24 byte sense byte 25 and 27 is set as well. 2390 * 2391 * PARAMETER 2392 * cqr1 first cqr, which will be compared with the 2393 * cqr2 second cqr. 2394 * 2395 * RETURN VALUES 2396 * match 'boolean' for match found 2397 * returns 1 if match found, otherwise 0. 2398 */ 2399 static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, 2400 struct dasd_ccw_req *cqr2) 2401 { 2402 char *sense1, *sense2; 2403 2404 if (cqr1->startdev != cqr2->startdev) 2405 return 0; 2406 2407 sense1 = dasd_get_sense(&cqr1->irb); 2408 sense2 = dasd_get_sense(&cqr2->irb); 2409 2410 /* one request has sense data, the other not -> no match, return 0 */ 2411 if (!sense1 != !sense2) 2412 return 0; 2413 /* no sense data in both cases -> check cstat for IFCC */ 2414 if (!sense1 && !sense2) { 2415 if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | 2416 SCHN_STAT_CHN_CTRL_CHK)) == 2417 (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | 2418 SCHN_STAT_CHN_CTRL_CHK))) 2419 return 1; /* match with ifcc*/ 2420 } 2421 /* check sense data; byte 0-2,25,27 */ 2422 if (!(sense1 && sense2 && 2423 (memcmp(sense1, sense2, 3) == 0) && 2424 (sense1[27] == sense2[27]) && 2425 (sense1[25] == sense2[25]))) { 2426 2427 return 0; /* sense doesn't match */ 2428 } 2429 2430 return 1; /* match */ 2431 2432 } /* end dasd_3990_erp_error_match */ 2433 2434 /* 2435 * DASD_3990_ERP_IN_ERP 2436 * 2437 * DESCRIPTION 2438 * check if the current error already happened before. 2439 * quick exit if current cqr is not an ERP (cqr->refers=NULL) 2440 * 2441 * PARAMETER 2442 * cqr failed cqr (either original cqr or already an erp) 2443 * 2444 * RETURN VALUES 2445 * erp erp-pointer to the already defined error 2446 * recovery procedure OR 2447 * NULL if a 'new' error occurred. 2448 */ 2449 static struct dasd_ccw_req * 2450 dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr) 2451 { 2452 2453 struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */ 2454 *erp_match = NULL; /* save erp chain head */ 2455 int match = 0; /* 'boolean' for matching error found */ 2456 2457 if (cqr->refers == NULL) { /* return if not in erp */ 2458 return NULL; 2459 } 2460 2461 /* check the erp/cqr chain for current error */ 2462 do { 2463 match = dasd_3990_erp_error_match(erp_head, cqr->refers); 2464 erp_match = cqr; /* save possible matching erp */ 2465 cqr = cqr->refers; /* check next erp/cqr in queue */ 2466 2467 } while ((cqr->refers != NULL) && (!match)); 2468 2469 if (!match) { 2470 return NULL; /* no match was found */ 2471 } 2472 2473 return erp_match; /* return address of matching erp */ 2474 2475 } /* END dasd_3990_erp_in_erp */ 2476 2477 /* 2478 * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense) 2479 * 2480 * DESCRIPTION 2481 * No retry is left for the current ERP. Check what has to be done 2482 * with the ERP. 2483 * - do further defined ERP action or 2484 * - wait for interrupt or 2485 * - exit with permanent error 2486 * 2487 * PARAMETER 2488 * erp ERP which is in progress with no retry left 2489 * 2490 * RETURN VALUES 2491 * erp modified/additional ERP 2492 */ 2493 static struct dasd_ccw_req * 2494 dasd_3990_erp_further_erp(struct dasd_ccw_req *erp) 2495 { 2496 2497 struct dasd_device *device = erp->startdev; 2498 char *sense = dasd_get_sense(&erp->irb); 2499 2500 /* check for 24 byte sense ERP */ 2501 if ((erp->function == dasd_3990_erp_bus_out) || 2502 (erp->function == dasd_3990_erp_action_1) || 2503 (erp->function == dasd_3990_erp_action_4)) { 2504 2505 erp = dasd_3990_erp_action_1(erp); 2506 2507 } else if (erp->function == dasd_3990_erp_action_1_sec) { 2508 erp = dasd_3990_erp_action_1_sec(erp); 2509 } else if (erp->function == dasd_3990_erp_action_5) { 2510 2511 /* retries have not been successful */ 2512 /* prepare erp for retry on different channel path */ 2513 erp = dasd_3990_erp_action_1(erp); 2514 2515 if (sense && !(sense[2] & DASD_SENSE_BIT_0)) { 2516 2517 /* issue a Diagnostic Control command with an 2518 * Inhibit Write subcommand */ 2519 2520 switch (sense[25]) { 2521 case 0x17: 2522 case 0x57:{ /* controller */ 2523 erp = dasd_3990_erp_DCTL(erp, 0x20); 2524 break; 2525 } 2526 case 0x18: 2527 case 0x58:{ /* channel path */ 2528 erp = dasd_3990_erp_DCTL(erp, 0x40); 2529 break; 2530 } 2531 case 0x19: 2532 case 0x59:{ /* storage director */ 2533 erp = dasd_3990_erp_DCTL(erp, 0x80); 2534 break; 2535 } 2536 default: 2537 DBF_DEV_EVENT(DBF_WARNING, device, 2538 "invalid subcommand modifier 0x%x " 2539 "for Diagnostic Control Command", 2540 sense[25]); 2541 } 2542 } 2543 2544 /* check for 32 byte sense ERP */ 2545 } else if (sense && 2546 ((erp->function == dasd_3990_erp_compound_retry) || 2547 (erp->function == dasd_3990_erp_compound_path) || 2548 (erp->function == dasd_3990_erp_compound_code) || 2549 (erp->function == dasd_3990_erp_compound_config))) { 2550 2551 erp = dasd_3990_erp_compound(erp, sense); 2552 2553 } else { 2554 /* 2555 * No retry left and no additional special handling 2556 * necessary 2557 */ 2558 dev_err(&device->cdev->dev, 2559 "ERP %p has run out of retries and failed\n", erp); 2560 2561 erp->status = DASD_CQR_FAILED; 2562 } 2563 2564 return erp; 2565 2566 } /* end dasd_3990_erp_further_erp */ 2567 2568 /* 2569 * DASD_3990_ERP_HANDLE_MATCH_ERP 2570 * 2571 * DESCRIPTION 2572 * An error occurred again and an ERP has been detected which is already 2573 * used to handle this error (e.g. retries). 2574 * All prior ERP's are asumed to be successful and therefore removed 2575 * from queue. 2576 * If retry counter of matching erp is already 0, it is checked if further 2577 * action is needed (besides retry) or if the ERP has failed. 2578 * 2579 * PARAMETER 2580 * erp_head first ERP in ERP-chain 2581 * erp ERP that handles the actual error. 2582 * (matching erp) 2583 * 2584 * RETURN VALUES 2585 * erp modified/additional ERP 2586 */ 2587 static struct dasd_ccw_req * 2588 dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head, 2589 struct dasd_ccw_req *erp) 2590 { 2591 2592 struct dasd_device *device = erp_head->startdev; 2593 struct dasd_ccw_req *erp_done = erp_head; /* finished req */ 2594 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */ 2595 2596 /* loop over successful ERPs and remove them from chanq */ 2597 while (erp_done != erp) { 2598 2599 if (erp_done == NULL) /* end of chain reached */ 2600 panic(PRINTK_HEADER "Programming error in ERP! The " 2601 "original request was lost\n"); 2602 2603 /* remove the request from the device queue */ 2604 list_del(&erp_done->blocklist); 2605 2606 erp_free = erp_done; 2607 erp_done = erp_done->refers; 2608 2609 /* free the finished erp request */ 2610 dasd_free_erp_request(erp_free, erp_free->memdev); 2611 2612 } /* end while */ 2613 2614 if (erp->retries > 0) { 2615 2616 char *sense = dasd_get_sense(&erp->refers->irb); 2617 2618 /* check for special retries */ 2619 if (sense && erp->function == dasd_3990_erp_action_4) { 2620 2621 erp = dasd_3990_erp_action_4(erp, sense); 2622 2623 } else if (sense && 2624 erp->function == dasd_3990_erp_action_1B_32) { 2625 2626 erp = dasd_3990_update_1B(erp, sense); 2627 2628 } else if (sense && erp->function == dasd_3990_erp_int_req) { 2629 2630 erp = dasd_3990_erp_int_req(erp); 2631 2632 } else { 2633 /* simple retry */ 2634 DBF_DEV_EVENT(DBF_DEBUG, device, 2635 "%i retries left for erp %p", 2636 erp->retries, erp); 2637 2638 /* handle the request again... */ 2639 erp->status = DASD_CQR_FILLED; 2640 } 2641 2642 } else { 2643 /* no retry left - check for further necessary action */ 2644 /* if no further actions, handle rest as permanent error */ 2645 erp = dasd_3990_erp_further_erp(erp); 2646 } 2647 2648 return erp; 2649 2650 } /* end dasd_3990_erp_handle_match_erp */ 2651 2652 /* 2653 * DASD_3990_ERP_ACTION 2654 * 2655 * DESCRIPTION 2656 * control routine for 3990 erp actions. 2657 * Has to be called with the queue lock (namely the s390_irq_lock) acquired. 2658 * 2659 * PARAMETER 2660 * cqr failed cqr (either original cqr or already an erp) 2661 * 2662 * RETURN VALUES 2663 * erp erp-pointer to the head of the ERP action chain. 2664 * This means: 2665 * - either a ptr to an additional ERP cqr or 2666 * - the original given cqr (which's status might 2667 * be modified) 2668 */ 2669 struct dasd_ccw_req * 2670 dasd_3990_erp_action(struct dasd_ccw_req * cqr) 2671 { 2672 struct dasd_ccw_req *erp = NULL; 2673 struct dasd_device *device = cqr->startdev; 2674 struct dasd_ccw_req *temp_erp = NULL; 2675 2676 if (device->features & DASD_FEATURE_ERPLOG) { 2677 /* print current erp_chain */ 2678 dev_err(&device->cdev->dev, 2679 "ERP chain at BEGINNING of ERP-ACTION\n"); 2680 for (temp_erp = cqr; 2681 temp_erp != NULL; temp_erp = temp_erp->refers) { 2682 2683 dev_err(&device->cdev->dev, 2684 "ERP %p (%02x) refers to %p\n", 2685 temp_erp, temp_erp->status, 2686 temp_erp->refers); 2687 } 2688 } 2689 2690 /* double-check if current erp/cqr was successful */ 2691 if ((scsw_cstat(&cqr->irb.scsw) == 0x00) && 2692 (scsw_dstat(&cqr->irb.scsw) == 2693 (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) { 2694 2695 DBF_DEV_EVENT(DBF_DEBUG, device, 2696 "ERP called for successful request %p" 2697 " - NO ERP necessary", cqr); 2698 2699 cqr->status = DASD_CQR_DONE; 2700 2701 return cqr; 2702 } 2703 2704 /* check if error happened before */ 2705 erp = dasd_3990_erp_in_erp(cqr); 2706 2707 if (erp == NULL) { 2708 /* no matching erp found - set up erp */ 2709 erp = dasd_3990_erp_additional_erp(cqr); 2710 } else { 2711 /* matching erp found - set all leading erp's to DONE */ 2712 erp = dasd_3990_erp_handle_match_erp(cqr, erp); 2713 } 2714 2715 if (device->features & DASD_FEATURE_ERPLOG) { 2716 /* print current erp_chain */ 2717 dev_err(&device->cdev->dev, 2718 "ERP chain at END of ERP-ACTION\n"); 2719 for (temp_erp = erp; 2720 temp_erp != NULL; temp_erp = temp_erp->refers) { 2721 2722 dev_err(&device->cdev->dev, 2723 "ERP %p (%02x) refers to %p\n", 2724 temp_erp, temp_erp->status, 2725 temp_erp->refers); 2726 } 2727 } 2728 2729 /* enqueue ERP request if it's a new one */ 2730 if (list_empty(&erp->blocklist)) { 2731 cqr->status = DASD_CQR_IN_ERP; 2732 /* add erp request before the cqr */ 2733 list_add_tail(&erp->blocklist, &cqr->blocklist); 2734 } 2735 2736 2737 2738 return erp; 2739 2740 } /* end dasd_3990_erp_action */ 2741