1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * tape device discipline for 3590 tapes. 4 * 5 * Copyright IBM Corp. 2001, 2009 6 * Author(s): Stefan Bader <shbader@de.ibm.com> 7 * Michael Holzheu <holzheu@de.ibm.com> 8 * Martin Schwidefsky <schwidefsky@de.ibm.com> 9 */ 10 11 #define KMSG_COMPONENT "tape_3590" 12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 13 14 #include <linux/module.h> 15 #include <linux/slab.h> 16 #include <linux/init.h> 17 #include <linux/bio.h> 18 #include <asm/ebcdic.h> 19 20 #define TAPE_DBF_AREA tape_3590_dbf 21 #define BUFSIZE 512 /* size of buffers for dynamic generated messages */ 22 23 #include "tape.h" 24 #include "tape_std.h" 25 #include "tape_3590.h" 26 27 static struct workqueue_struct *tape_3590_wq; 28 29 /* 30 * Pointer to debug area. 31 */ 32 debug_info_t *TAPE_DBF_AREA = NULL; 33 EXPORT_SYMBOL(TAPE_DBF_AREA); 34 35 /******************************************************************* 36 * Error Recovery functions: 37 * - Read Opposite: implemented 38 * - Read Device (buffered) log: BRA 39 * - Read Library log: BRA 40 * - Swap Devices: BRA 41 * - Long Busy: implemented 42 * - Special Intercept: BRA 43 * - Read Alternate: implemented 44 *******************************************************************/ 45 46 static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = { 47 [0x00] = "", 48 [0x10] = "Lost Sense", 49 [0x11] = "Assigned Elsewhere", 50 [0x12] = "Allegiance Reset", 51 [0x13] = "Shared Access Violation", 52 [0x20] = "Command Reject", 53 [0x21] = "Configuration Error", 54 [0x22] = "Protection Exception", 55 [0x23] = "Write Protect", 56 [0x24] = "Write Length", 57 [0x25] = "Read-Only Format", 58 [0x31] = "Beginning of Partition", 59 [0x33] = "End of Partition", 60 [0x34] = "End of Data", 61 [0x35] = "Block not found", 62 [0x40] = "Device Intervention", 63 [0x41] = "Loader Intervention", 64 [0x42] = "Library Intervention", 65 [0x50] = "Write Error", 66 [0x51] = "Erase Error", 67 [0x52] = "Formatting Error", 68 [0x53] = "Read Error", 69 [0x54] = "Unsupported Format", 70 [0x55] = "No Formatting", 71 [0x56] = "Positioning lost", 72 [0x57] = "Read Length", 73 [0x60] = "Unsupported Medium", 74 [0x61] = "Medium Length Error", 75 [0x62] = "Medium removed", 76 [0x64] = "Load Check", 77 [0x65] = "Unload Check", 78 [0x70] = "Equipment Check", 79 [0x71] = "Bus out Check", 80 [0x72] = "Protocol Error", 81 [0x73] = "Interface Error", 82 [0x74] = "Overrun", 83 [0x75] = "Halt Signal", 84 [0x90] = "Device fenced", 85 [0x91] = "Device Path fenced", 86 [0xa0] = "Volume misplaced", 87 [0xa1] = "Volume inaccessible", 88 [0xa2] = "Volume in input", 89 [0xa3] = "Volume ejected", 90 [0xa4] = "All categories reserved", 91 [0xa5] = "Duplicate Volume", 92 [0xa6] = "Library Manager Offline", 93 [0xa7] = "Library Output Station full", 94 [0xa8] = "Vision System non-operational", 95 [0xa9] = "Library Manager Equipment Check", 96 [0xaa] = "Library Equipment Check", 97 [0xab] = "All Library Cells full", 98 [0xac] = "No Cleaner Volumes in Library", 99 [0xad] = "I/O Station door open", 100 [0xae] = "Subsystem environmental alert", 101 }; 102 103 static int crypt_supported(struct tape_device *device) 104 { 105 return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device)); 106 } 107 108 static int crypt_enabled(struct tape_device *device) 109 { 110 return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device)); 111 } 112 113 static void ext_to_int_kekl(struct tape390_kekl *in, 114 struct tape3592_kekl *out) 115 { 116 int len; 117 118 memset(out, 0, sizeof(*out)); 119 if (in->type == TAPE390_KEKL_TYPE_HASH) 120 out->flags |= 0x40; 121 if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH) 122 out->flags |= 0x80; 123 len = min(sizeof(out->label), strlen(in->label)); 124 memcpy(out->label, in->label, len); 125 memset(out->label + len, ' ', sizeof(out->label) - len); 126 ASCEBC(out->label, sizeof(out->label)); 127 } 128 129 static void int_to_ext_kekl(struct tape3592_kekl *in, 130 struct tape390_kekl *out) 131 { 132 memset(out, 0, sizeof(*out)); 133 if(in->flags & 0x40) 134 out->type = TAPE390_KEKL_TYPE_HASH; 135 else 136 out->type = TAPE390_KEKL_TYPE_LABEL; 137 if(in->flags & 0x80) 138 out->type_on_tape = TAPE390_KEKL_TYPE_HASH; 139 else 140 out->type_on_tape = TAPE390_KEKL_TYPE_LABEL; 141 memcpy(out->label, in->label, sizeof(in->label)); 142 EBCASC(out->label, sizeof(in->label)); 143 strim(out->label); 144 } 145 146 static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in, 147 struct tape390_kekl_pair *out) 148 { 149 if (in->count == 0) { 150 out->kekl[0].type = TAPE390_KEKL_TYPE_NONE; 151 out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE; 152 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; 153 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; 154 } else if (in->count == 1) { 155 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); 156 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; 157 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; 158 } else if (in->count == 2) { 159 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); 160 int_to_ext_kekl(&in->kekl[1], &out->kekl[1]); 161 } else { 162 printk("Invalid KEKL number: %d\n", in->count); 163 BUG(); 164 } 165 } 166 167 static int check_ext_kekl(struct tape390_kekl *kekl) 168 { 169 if (kekl->type == TAPE390_KEKL_TYPE_NONE) 170 goto invalid; 171 if (kekl->type > TAPE390_KEKL_TYPE_HASH) 172 goto invalid; 173 if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE) 174 goto invalid; 175 if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH) 176 goto invalid; 177 if ((kekl->type == TAPE390_KEKL_TYPE_HASH) && 178 (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL)) 179 goto invalid; 180 181 return 0; 182 invalid: 183 return -EINVAL; 184 } 185 186 static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls) 187 { 188 if (check_ext_kekl(&kekls->kekl[0])) 189 goto invalid; 190 if (check_ext_kekl(&kekls->kekl[1])) 191 goto invalid; 192 193 return 0; 194 invalid: 195 return -EINVAL; 196 } 197 198 /* 199 * Query KEKLs 200 */ 201 static int tape_3592_kekl_query(struct tape_device *device, 202 struct tape390_kekl_pair *ext_kekls) 203 { 204 struct tape_request *request; 205 struct tape3592_kekl_query_order *order; 206 struct tape3592_kekl_query_data *int_kekls; 207 int rc; 208 209 DBF_EVENT(6, "tape3592_kekl_query\n"); 210 int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA); 211 if (!int_kekls) 212 return -ENOMEM; 213 request = tape_alloc_request(2, sizeof(*order)); 214 if (IS_ERR(request)) { 215 rc = PTR_ERR(request); 216 goto fail_malloc; 217 } 218 order = request->cpdata; 219 memset(order,0,sizeof(*order)); 220 order->code = 0xe2; 221 order->max_count = 2; 222 request->op = TO_KEKL_QUERY; 223 tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); 224 tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls), 225 int_kekls); 226 rc = tape_do_io(device, request); 227 if (rc) 228 goto fail_request; 229 int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls); 230 231 rc = 0; 232 fail_request: 233 tape_free_request(request); 234 fail_malloc: 235 kfree(int_kekls); 236 return rc; 237 } 238 239 /* 240 * IOCTL: Query KEKLs 241 */ 242 static int tape_3592_ioctl_kekl_query(struct tape_device *device, 243 unsigned long arg) 244 { 245 int rc; 246 struct tape390_kekl_pair *ext_kekls; 247 248 DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n"); 249 if (!crypt_supported(device)) 250 return -ENOSYS; 251 if (!crypt_enabled(device)) 252 return -EUNATCH; 253 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); 254 if (!ext_kekls) 255 return -ENOMEM; 256 rc = tape_3592_kekl_query(device, ext_kekls); 257 if (rc != 0) 258 goto fail; 259 if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) { 260 rc = -EFAULT; 261 goto fail; 262 } 263 rc = 0; 264 fail: 265 kfree(ext_kekls); 266 return rc; 267 } 268 269 static int tape_3590_mttell(struct tape_device *device, int mt_count); 270 271 /* 272 * Set KEKLs 273 */ 274 static int tape_3592_kekl_set(struct tape_device *device, 275 struct tape390_kekl_pair *ext_kekls) 276 { 277 struct tape_request *request; 278 struct tape3592_kekl_set_order *order; 279 280 DBF_EVENT(6, "tape3592_kekl_set\n"); 281 if (check_ext_kekl_pair(ext_kekls)) { 282 DBF_EVENT(6, "invalid kekls\n"); 283 return -EINVAL; 284 } 285 if (tape_3590_mttell(device, 0) != 0) 286 return -EBADSLT; 287 request = tape_alloc_request(1, sizeof(*order)); 288 if (IS_ERR(request)) 289 return PTR_ERR(request); 290 order = request->cpdata; 291 memset(order, 0, sizeof(*order)); 292 order->code = 0xe3; 293 order->kekls.count = 2; 294 ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]); 295 ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]); 296 request->op = TO_KEKL_SET; 297 tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); 298 299 return tape_do_io_free(device, request); 300 } 301 302 /* 303 * IOCTL: Set KEKLs 304 */ 305 static int tape_3592_ioctl_kekl_set(struct tape_device *device, 306 unsigned long arg) 307 { 308 int rc; 309 struct tape390_kekl_pair *ext_kekls; 310 311 DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n"); 312 if (!crypt_supported(device)) 313 return -ENOSYS; 314 if (!crypt_enabled(device)) 315 return -EUNATCH; 316 ext_kekls = memdup_user((char __user *)arg, sizeof(*ext_kekls)); 317 if (IS_ERR(ext_kekls)) 318 return PTR_ERR(ext_kekls); 319 rc = tape_3592_kekl_set(device, ext_kekls); 320 kfree(ext_kekls); 321 return rc; 322 } 323 324 /* 325 * Enable encryption 326 */ 327 static struct tape_request *__tape_3592_enable_crypt(struct tape_device *device) 328 { 329 struct tape_request *request; 330 char *data; 331 332 DBF_EVENT(6, "tape_3592_enable_crypt\n"); 333 if (!crypt_supported(device)) 334 return ERR_PTR(-ENOSYS); 335 request = tape_alloc_request(2, 72); 336 if (IS_ERR(request)) 337 return request; 338 data = request->cpdata; 339 memset(data,0,72); 340 341 data[0] = 0x05; 342 data[36 + 0] = 0x03; 343 data[36 + 1] = 0x03; 344 data[36 + 4] = 0x40; 345 data[36 + 6] = 0x01; 346 data[36 + 14] = 0x2f; 347 data[36 + 18] = 0xc3; 348 data[36 + 35] = 0x72; 349 request->op = TO_CRYPT_ON; 350 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 351 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 352 return request; 353 } 354 355 static int tape_3592_enable_crypt(struct tape_device *device) 356 { 357 struct tape_request *request; 358 359 request = __tape_3592_enable_crypt(device); 360 if (IS_ERR(request)) 361 return PTR_ERR(request); 362 return tape_do_io_free(device, request); 363 } 364 365 static void tape_3592_enable_crypt_async(struct tape_device *device) 366 { 367 struct tape_request *request; 368 369 request = __tape_3592_enable_crypt(device); 370 if (!IS_ERR(request)) 371 tape_do_io_async_free(device, request); 372 } 373 374 /* 375 * Disable encryption 376 */ 377 static struct tape_request *__tape_3592_disable_crypt(struct tape_device *device) 378 { 379 struct tape_request *request; 380 char *data; 381 382 DBF_EVENT(6, "tape_3592_disable_crypt\n"); 383 if (!crypt_supported(device)) 384 return ERR_PTR(-ENOSYS); 385 request = tape_alloc_request(2, 72); 386 if (IS_ERR(request)) 387 return request; 388 data = request->cpdata; 389 memset(data,0,72); 390 391 data[0] = 0x05; 392 data[36 + 0] = 0x03; 393 data[36 + 1] = 0x03; 394 data[36 + 35] = 0x32; 395 396 request->op = TO_CRYPT_OFF; 397 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 398 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 399 400 return request; 401 } 402 403 static int tape_3592_disable_crypt(struct tape_device *device) 404 { 405 struct tape_request *request; 406 407 request = __tape_3592_disable_crypt(device); 408 if (IS_ERR(request)) 409 return PTR_ERR(request); 410 return tape_do_io_free(device, request); 411 } 412 413 static void tape_3592_disable_crypt_async(struct tape_device *device) 414 { 415 struct tape_request *request; 416 417 request = __tape_3592_disable_crypt(device); 418 if (!IS_ERR(request)) 419 tape_do_io_async_free(device, request); 420 } 421 422 /* 423 * IOCTL: Set encryption status 424 */ 425 static int tape_3592_ioctl_crypt_set(struct tape_device *device, 426 unsigned long arg) 427 { 428 struct tape390_crypt_info info; 429 430 DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n"); 431 if (!crypt_supported(device)) 432 return -ENOSYS; 433 if (copy_from_user(&info, (char __user *)arg, sizeof(info))) 434 return -EFAULT; 435 if (info.status & ~TAPE390_CRYPT_ON_MASK) 436 return -EINVAL; 437 if (info.status & TAPE390_CRYPT_ON_MASK) 438 return tape_3592_enable_crypt(device); 439 else 440 return tape_3592_disable_crypt(device); 441 } 442 443 static int tape_3590_sense_medium(struct tape_device *device); 444 445 /* 446 * IOCTL: Query enryption status 447 */ 448 static int tape_3592_ioctl_crypt_query(struct tape_device *device, 449 unsigned long arg) 450 { 451 DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n"); 452 if (!crypt_supported(device)) 453 return -ENOSYS; 454 tape_3590_sense_medium(device); 455 if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device), 456 sizeof(TAPE_3590_CRYPT_INFO(device)))) 457 return -EFAULT; 458 else 459 return 0; 460 } 461 462 /* 463 * 3590 IOCTL Overload 464 */ 465 static int 466 tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) 467 { 468 switch (cmd) { 469 case TAPE390_DISPLAY: { 470 struct display_struct disp; 471 472 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp))) 473 return -EFAULT; 474 475 return tape_std_display(device, &disp); 476 } 477 case TAPE390_KEKL_SET: 478 return tape_3592_ioctl_kekl_set(device, arg); 479 case TAPE390_KEKL_QUERY: 480 return tape_3592_ioctl_kekl_query(device, arg); 481 case TAPE390_CRYPT_SET: 482 return tape_3592_ioctl_crypt_set(device, arg); 483 case TAPE390_CRYPT_QUERY: 484 return tape_3592_ioctl_crypt_query(device, arg); 485 default: 486 return -EINVAL; /* no additional ioctls */ 487 } 488 } 489 490 /* 491 * SENSE Medium: Get Sense data about medium state 492 */ 493 static int tape_3590_sense_medium(struct tape_device *device) 494 { 495 struct tape_request *request; 496 497 request = tape_alloc_request(1, 128); 498 if (IS_ERR(request)) 499 return PTR_ERR(request); 500 request->op = TO_MSEN; 501 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); 502 return tape_do_io_free(device, request); 503 } 504 505 static void tape_3590_sense_medium_async(struct tape_device *device) 506 { 507 struct tape_request *request; 508 509 request = tape_alloc_request(1, 128); 510 if (IS_ERR(request)) 511 return; 512 request->op = TO_MSEN; 513 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); 514 tape_do_io_async_free(device, request); 515 } 516 517 /* 518 * MTTELL: Tell block. Return the number of block relative to current file. 519 */ 520 static int 521 tape_3590_mttell(struct tape_device *device, int mt_count) 522 { 523 __u64 block_id; 524 int rc; 525 526 rc = tape_std_read_block_id(device, &block_id); 527 if (rc) 528 return rc; 529 return block_id >> 32; 530 } 531 532 /* 533 * MTSEEK: seek to the specified block. 534 */ 535 static int 536 tape_3590_mtseek(struct tape_device *device, int count) 537 { 538 struct tape_request *request; 539 540 DBF_EVENT(6, "xsee id: %x\n", count); 541 request = tape_alloc_request(3, 4); 542 if (IS_ERR(request)) 543 return PTR_ERR(request); 544 request->op = TO_LBL; 545 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 546 *(__u32 *) request->cpdata = count; 547 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 548 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 549 return tape_do_io_free(device, request); 550 } 551 552 /* 553 * Read Opposite Error Recovery Function: 554 * Used, when Read Forward does not work 555 */ 556 static void 557 tape_3590_read_opposite(struct tape_device *device, 558 struct tape_request *request) 559 { 560 struct tape_3590_disc_data *data; 561 562 /* 563 * We have allocated 4 ccws in tape_std_read, so we can now 564 * transform the request to a read backward, followed by a 565 * forward space block. 566 */ 567 request->op = TO_RBA; 568 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 569 data = device->discdata; 570 tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op, 571 device->char_data.idal_buf); 572 tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); 573 tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); 574 DBF_EVENT(6, "xrop ccwg\n"); 575 } 576 577 /* 578 * Read Attention Msg 579 * This should be done after an interrupt with attention bit (0x80) 580 * in device state. 581 * 582 * After a "read attention message" request there are two possible 583 * results: 584 * 585 * 1. A unit check is presented, when attention sense is present (e.g. when 586 * a medium has been unloaded). The attention sense comes then 587 * together with the unit check. The recovery action is either "retry" 588 * (in case there is an attention message pending) or "permanent error". 589 * 590 * 2. The attention msg is written to the "read subsystem data" buffer. 591 * In this case we probably should print it to the console. 592 */ 593 static void tape_3590_read_attmsg_async(struct tape_device *device) 594 { 595 struct tape_request *request; 596 char *buf; 597 598 request = tape_alloc_request(3, 4096); 599 if (IS_ERR(request)) 600 return; 601 request->op = TO_READ_ATTMSG; 602 buf = request->cpdata; 603 buf[0] = PREP_RD_SS_DATA; 604 buf[6] = RD_ATTMSG; /* read att msg */ 605 tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf); 606 tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12); 607 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 608 tape_do_io_async_free(device, request); 609 } 610 611 /* 612 * These functions are used to schedule follow-up actions from within an 613 * interrupt context (like unsolicited interrupts). 614 * Note: the work handler is called by the system work queue. The tape 615 * commands started by the handler need to be asynchrounous, otherwise 616 * a deadlock can occur e.g. in case of a deferred cc=1 (see __tape_do_irq). 617 */ 618 struct work_handler_data { 619 struct tape_device *device; 620 enum tape_op op; 621 struct work_struct work; 622 }; 623 624 static void 625 tape_3590_work_handler(struct work_struct *work) 626 { 627 struct work_handler_data *p = 628 container_of(work, struct work_handler_data, work); 629 630 switch (p->op) { 631 case TO_MSEN: 632 tape_3590_sense_medium_async(p->device); 633 break; 634 case TO_READ_ATTMSG: 635 tape_3590_read_attmsg_async(p->device); 636 break; 637 case TO_CRYPT_ON: 638 tape_3592_enable_crypt_async(p->device); 639 break; 640 case TO_CRYPT_OFF: 641 tape_3592_disable_crypt_async(p->device); 642 break; 643 default: 644 DBF_EVENT(3, "T3590: work handler undefined for " 645 "operation 0x%02x\n", p->op); 646 } 647 tape_put_device(p->device); 648 kfree(p); 649 } 650 651 static int 652 tape_3590_schedule_work(struct tape_device *device, enum tape_op op) 653 { 654 struct work_handler_data *p; 655 656 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) 657 return -ENOMEM; 658 659 INIT_WORK(&p->work, tape_3590_work_handler); 660 661 p->device = tape_get_device(device); 662 p->op = op; 663 664 queue_work(tape_3590_wq, &p->work); 665 return 0; 666 } 667 668 static void tape_3590_med_state_set(struct tape_device *device, 669 struct tape_3590_med_sense *sense) 670 { 671 struct tape390_crypt_info *c_info; 672 673 c_info = &TAPE_3590_CRYPT_INFO(device); 674 675 DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst); 676 switch (sense->macst) { 677 case 0x04: 678 case 0x05: 679 case 0x06: 680 tape_med_state_set(device, MS_UNLOADED); 681 TAPE_3590_CRYPT_INFO(device).medium_status = 0; 682 return; 683 case 0x08: 684 case 0x09: 685 tape_med_state_set(device, MS_LOADED); 686 break; 687 default: 688 tape_med_state_set(device, MS_UNKNOWN); 689 return; 690 } 691 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; 692 if (sense->flags & MSENSE_CRYPT_MASK) { 693 DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags); 694 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK; 695 } else { 696 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags); 697 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK; 698 } 699 } 700 701 /* 702 * The done handler is called at device/channel end and wakes up the sleeping 703 * process 704 */ 705 static int 706 tape_3590_done(struct tape_device *device, struct tape_request *request) 707 { 708 709 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); 710 711 switch (request->op) { 712 case TO_BSB: 713 case TO_BSF: 714 case TO_DSE: 715 case TO_FSB: 716 case TO_FSF: 717 case TO_LBL: 718 case TO_RFO: 719 case TO_RBA: 720 case TO_REW: 721 case TO_WRI: 722 case TO_WTM: 723 case TO_BLOCK: 724 case TO_LOAD: 725 tape_med_state_set(device, MS_LOADED); 726 break; 727 case TO_RUN: 728 tape_med_state_set(device, MS_UNLOADED); 729 tape_3590_schedule_work(device, TO_CRYPT_OFF); 730 break; 731 case TO_MSEN: 732 tape_3590_med_state_set(device, request->cpdata); 733 break; 734 case TO_CRYPT_ON: 735 TAPE_3590_CRYPT_INFO(device).status 736 |= TAPE390_CRYPT_ON_MASK; 737 *(device->modeset_byte) |= 0x03; 738 break; 739 case TO_CRYPT_OFF: 740 TAPE_3590_CRYPT_INFO(device).status 741 &= ~TAPE390_CRYPT_ON_MASK; 742 *(device->modeset_byte) &= ~0x03; 743 break; 744 case TO_RBI: /* RBI seems to succeed even without medium loaded. */ 745 case TO_NOP: /* Same to NOP. */ 746 case TO_READ_CONFIG: 747 case TO_READ_ATTMSG: 748 case TO_DIS: 749 case TO_ASSIGN: 750 case TO_UNASSIGN: 751 case TO_SIZE: 752 case TO_KEKL_SET: 753 case TO_KEKL_QUERY: 754 case TO_RDC: 755 break; 756 } 757 return TAPE_IO_SUCCESS; 758 } 759 760 /* 761 * This function is called, when error recovery was successful 762 */ 763 static inline int 764 tape_3590_erp_succeeded(struct tape_device *device, struct tape_request *request) 765 { 766 DBF_EVENT(3, "Error Recovery successful for %s\n", 767 tape_op_verbose[request->op]); 768 return tape_3590_done(device, request); 769 } 770 771 /* 772 * This function is called, when error recovery was not successful 773 */ 774 static inline int 775 tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, 776 struct irb *irb, int rc) 777 { 778 DBF_EVENT(3, "Error Recovery failed for %s\n", 779 tape_op_verbose[request->op]); 780 tape_dump_sense_dbf(device, request, irb); 781 return rc; 782 } 783 784 /* 785 * Error Recovery do retry 786 */ 787 static inline int 788 tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, 789 struct irb *irb) 790 { 791 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); 792 tape_dump_sense_dbf(device, request, irb); 793 return TAPE_IO_RETRY; 794 } 795 796 /* 797 * Handle unsolicited interrupts 798 */ 799 static int 800 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) 801 { 802 if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END) 803 /* Probably result of halt ssch */ 804 return TAPE_IO_PENDING; 805 else if (irb->scsw.cmd.dstat == 0x85) 806 /* Device Ready */ 807 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); 808 else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 809 tape_3590_schedule_work(device, TO_READ_ATTMSG); 810 } else { 811 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); 812 tape_dump_sense_dbf(device, NULL, irb); 813 } 814 /* check medium state */ 815 tape_3590_schedule_work(device, TO_MSEN); 816 return TAPE_IO_SUCCESS; 817 } 818 819 /* 820 * Basic Recovery routine 821 */ 822 static int 823 tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, 824 struct irb *irb, int rc) 825 { 826 struct tape_3590_sense *sense; 827 828 sense = (struct tape_3590_sense *) irb->ecw; 829 830 switch (sense->bra) { 831 case SENSE_BRA_PER: 832 return tape_3590_erp_failed(device, request, irb, rc); 833 case SENSE_BRA_CONT: 834 return tape_3590_erp_succeeded(device, request); 835 case SENSE_BRA_RE: 836 return tape_3590_erp_retry(device, request, irb); 837 case SENSE_BRA_DRE: 838 return tape_3590_erp_failed(device, request, irb, rc); 839 default: 840 BUG(); 841 return TAPE_IO_STOP; 842 } 843 } 844 845 /* 846 * RDL: Read Device (buffered) log 847 */ 848 static int 849 tape_3590_erp_read_buf_log(struct tape_device *device, 850 struct tape_request *request, struct irb *irb) 851 { 852 /* 853 * We just do the basic error recovery at the moment (retry). 854 * Perhaps in the future, we read the log and dump it somewhere... 855 */ 856 return tape_3590_erp_basic(device, request, irb, -EIO); 857 } 858 859 /* 860 * SWAP: Swap Devices 861 */ 862 static int 863 tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, 864 struct irb *irb) 865 { 866 /* 867 * This error recovery should swap the tapes 868 * if the original has a problem. The operation 869 * should proceed with the new tape... this 870 * should probably be done in user space! 871 */ 872 dev_warn (&device->cdev->dev, "The tape medium must be loaded into a " 873 "different tape unit\n"); 874 return tape_3590_erp_basic(device, request, irb, -EIO); 875 } 876 877 /* 878 * LBY: Long Busy 879 */ 880 static int 881 tape_3590_erp_long_busy(struct tape_device *device, 882 struct tape_request *request, struct irb *irb) 883 { 884 DBF_EVENT(6, "Device is busy\n"); 885 return TAPE_IO_LONG_BUSY; 886 } 887 888 /* 889 * SPI: Special Intercept 890 */ 891 static int 892 tape_3590_erp_special_interrupt(struct tape_device *device, 893 struct tape_request *request, struct irb *irb) 894 { 895 return tape_3590_erp_basic(device, request, irb, -EIO); 896 } 897 898 /* 899 * RDA: Read Alternate 900 */ 901 static int 902 tape_3590_erp_read_alternate(struct tape_device *device, 903 struct tape_request *request, struct irb *irb) 904 { 905 struct tape_3590_disc_data *data; 906 907 /* 908 * The issued Read Backward or Read Previous command is not 909 * supported by the device 910 * The recovery action should be to issue another command: 911 * Read Revious: if Read Backward is not supported 912 * Read Backward: if Read Previous is not supported 913 */ 914 data = device->discdata; 915 if (data->read_back_op == READ_PREVIOUS) { 916 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", 917 device->cdev_id); 918 data->read_back_op = READ_BACKWARD; 919 } else { 920 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", 921 device->cdev_id); 922 data->read_back_op = READ_PREVIOUS; 923 } 924 tape_3590_read_opposite(device, request); 925 return tape_3590_erp_retry(device, request, irb); 926 } 927 928 /* 929 * Error Recovery read opposite 930 */ 931 static int 932 tape_3590_erp_read_opposite(struct tape_device *device, 933 struct tape_request *request, struct irb *irb) 934 { 935 switch (request->op) { 936 case TO_RFO: 937 /* 938 * We did read forward, but the data could not be read. 939 * We will read backward and then skip forward again. 940 */ 941 tape_3590_read_opposite(device, request); 942 return tape_3590_erp_retry(device, request, irb); 943 case TO_RBA: 944 /* We tried to read forward and backward, but hat no success */ 945 return tape_3590_erp_failed(device, request, irb, -EIO); 946 break; 947 default: 948 return tape_3590_erp_failed(device, request, irb, -EIO); 949 } 950 } 951 952 /* 953 * Print an MIM (Media Information Message) (message code f0) 954 */ 955 static void 956 tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) 957 { 958 struct tape_3590_sense *sense; 959 char *exception, *service; 960 961 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 962 service = kmalloc(BUFSIZE, GFP_ATOMIC); 963 964 if (!exception || !service) 965 goto out_nomem; 966 967 sense = (struct tape_3590_sense *) irb->ecw; 968 /* Exception Message */ 969 switch (sense->fmt.f70.emc) { 970 case 0x02: 971 snprintf(exception, BUFSIZE, "Data degraded"); 972 break; 973 case 0x03: 974 snprintf(exception, BUFSIZE, "Data degraded in partition %i", 975 sense->fmt.f70.mp); 976 break; 977 case 0x04: 978 snprintf(exception, BUFSIZE, "Medium degraded"); 979 break; 980 case 0x05: 981 snprintf(exception, BUFSIZE, "Medium degraded in partition %i", 982 sense->fmt.f70.mp); 983 break; 984 case 0x06: 985 snprintf(exception, BUFSIZE, "Block 0 Error"); 986 break; 987 case 0x07: 988 snprintf(exception, BUFSIZE, "Medium Exception 0x%02x", 989 sense->fmt.f70.md); 990 break; 991 default: 992 snprintf(exception, BUFSIZE, "0x%02x", 993 sense->fmt.f70.emc); 994 break; 995 } 996 /* Service Message */ 997 switch (sense->fmt.f70.smc) { 998 case 0x02: 999 snprintf(service, BUFSIZE, "Reference Media maintenance " 1000 "procedure %i", sense->fmt.f70.md); 1001 break; 1002 default: 1003 snprintf(service, BUFSIZE, "0x%02x", 1004 sense->fmt.f70.smc); 1005 break; 1006 } 1007 1008 dev_warn (&device->cdev->dev, "Tape media information: exception %s, " 1009 "service %s\n", exception, service); 1010 1011 out_nomem: 1012 kfree(exception); 1013 kfree(service); 1014 } 1015 1016 /* 1017 * Print an I/O Subsystem Service Information Message (message code f1) 1018 */ 1019 static void 1020 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) 1021 { 1022 struct tape_3590_sense *sense; 1023 char *exception, *service; 1024 1025 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1026 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1027 1028 if (!exception || !service) 1029 goto out_nomem; 1030 1031 sense = (struct tape_3590_sense *) irb->ecw; 1032 /* Exception Message */ 1033 switch (sense->fmt.f71.emc) { 1034 case 0x01: 1035 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1036 break; 1037 case 0x02: 1038 snprintf(exception, BUFSIZE, "CU Exception - no performance " 1039 "impact"); 1040 break; 1041 case 0x03: 1042 snprintf(exception, BUFSIZE, "CU Exception on channel " 1043 "interface 0x%02x", sense->fmt.f71.md[0]); 1044 break; 1045 case 0x04: 1046 snprintf(exception, BUFSIZE, "CU Exception on device path " 1047 "0x%02x", sense->fmt.f71.md[0]); 1048 break; 1049 case 0x05: 1050 snprintf(exception, BUFSIZE, "CU Exception on library path " 1051 "0x%02x", sense->fmt.f71.md[0]); 1052 break; 1053 case 0x06: 1054 snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x", 1055 sense->fmt.f71.md[0]); 1056 break; 1057 case 0x07: 1058 snprintf(exception, BUFSIZE, "CU Exception on partition " 1059 "0x%02x", sense->fmt.f71.md[0]); 1060 break; 1061 default: 1062 snprintf(exception, BUFSIZE, "0x%02x", 1063 sense->fmt.f71.emc); 1064 } 1065 /* Service Message */ 1066 switch (sense->fmt.f71.smc) { 1067 case 0x01: 1068 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1069 break; 1070 case 0x02: 1071 snprintf(service, BUFSIZE, "Repair will not impact cu " 1072 "performance"); 1073 break; 1074 case 0x03: 1075 if (sense->fmt.f71.mdf == 0) 1076 snprintf(service, BUFSIZE, "Repair will disable node " 1077 "0x%x on CU", sense->fmt.f71.md[1]); 1078 else 1079 snprintf(service, BUFSIZE, "Repair will disable " 1080 "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1], 1081 sense->fmt.f71.md[2]); 1082 break; 1083 case 0x04: 1084 if (sense->fmt.f71.mdf == 0) 1085 snprintf(service, BUFSIZE, "Repair will disable " 1086 "channel path 0x%x on CU", 1087 sense->fmt.f71.md[1]); 1088 else 1089 snprintf(service, BUFSIZE, "Repair will disable channel" 1090 " paths (0x%x-0x%x) on CU", 1091 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1092 break; 1093 case 0x05: 1094 if (sense->fmt.f71.mdf == 0) 1095 snprintf(service, BUFSIZE, "Repair will disable device" 1096 " path 0x%x on CU", sense->fmt.f71.md[1]); 1097 else 1098 snprintf(service, BUFSIZE, "Repair will disable device" 1099 " paths (0x%x-0x%x) on CU", 1100 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1101 break; 1102 case 0x06: 1103 if (sense->fmt.f71.mdf == 0) 1104 snprintf(service, BUFSIZE, "Repair will disable " 1105 "library path 0x%x on CU", 1106 sense->fmt.f71.md[1]); 1107 else 1108 snprintf(service, BUFSIZE, "Repair will disable " 1109 "library paths (0x%x-0x%x) on CU", 1110 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1111 break; 1112 case 0x07: 1113 snprintf(service, BUFSIZE, "Repair will disable access to CU"); 1114 break; 1115 default: 1116 snprintf(service, BUFSIZE, "0x%02x", 1117 sense->fmt.f71.smc); 1118 } 1119 1120 dev_warn (&device->cdev->dev, "I/O subsystem information: exception" 1121 " %s, service %s\n", exception, service); 1122 out_nomem: 1123 kfree(exception); 1124 kfree(service); 1125 } 1126 1127 /* 1128 * Print an Device Subsystem Service Information Message (message code f2) 1129 */ 1130 static void 1131 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) 1132 { 1133 struct tape_3590_sense *sense; 1134 char *exception, *service; 1135 1136 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1137 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1138 1139 if (!exception || !service) 1140 goto out_nomem; 1141 1142 sense = (struct tape_3590_sense *) irb->ecw; 1143 /* Exception Message */ 1144 switch (sense->fmt.f71.emc) { 1145 case 0x01: 1146 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1147 break; 1148 case 0x02: 1149 snprintf(exception, BUFSIZE, "DV Exception - no performance" 1150 " impact"); 1151 break; 1152 case 0x03: 1153 snprintf(exception, BUFSIZE, "DV Exception on channel " 1154 "interface 0x%02x", sense->fmt.f71.md[0]); 1155 break; 1156 case 0x04: 1157 snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x", 1158 sense->fmt.f71.md[0]); 1159 break; 1160 case 0x05: 1161 snprintf(exception, BUFSIZE, "DV Exception on message display" 1162 " 0x%02x", sense->fmt.f71.md[0]); 1163 break; 1164 case 0x06: 1165 snprintf(exception, BUFSIZE, "DV Exception in tape path"); 1166 break; 1167 case 0x07: 1168 snprintf(exception, BUFSIZE, "DV Exception in drive"); 1169 break; 1170 default: 1171 snprintf(exception, BUFSIZE, "0x%02x", 1172 sense->fmt.f71.emc); 1173 } 1174 /* Service Message */ 1175 switch (sense->fmt.f71.smc) { 1176 case 0x01: 1177 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1178 break; 1179 case 0x02: 1180 snprintf(service, BUFSIZE, "Repair will not impact device " 1181 "performance"); 1182 break; 1183 case 0x03: 1184 if (sense->fmt.f71.mdf == 0) 1185 snprintf(service, BUFSIZE, "Repair will disable " 1186 "channel path 0x%x on DV", 1187 sense->fmt.f71.md[1]); 1188 else 1189 snprintf(service, BUFSIZE, "Repair will disable " 1190 "channel path (0x%x-0x%x) on DV", 1191 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1192 break; 1193 case 0x04: 1194 if (sense->fmt.f71.mdf == 0) 1195 snprintf(service, BUFSIZE, "Repair will disable " 1196 "interface 0x%x on DV", sense->fmt.f71.md[1]); 1197 else 1198 snprintf(service, BUFSIZE, "Repair will disable " 1199 "interfaces (0x%x-0x%x) on DV", 1200 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1201 break; 1202 case 0x05: 1203 if (sense->fmt.f71.mdf == 0) 1204 snprintf(service, BUFSIZE, "Repair will disable loader" 1205 " 0x%x on DV", sense->fmt.f71.md[1]); 1206 else 1207 snprintf(service, BUFSIZE, "Repair will disable loader" 1208 " (0x%x-0x%x) on DV", 1209 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1210 break; 1211 case 0x07: 1212 snprintf(service, BUFSIZE, "Repair will disable access to DV"); 1213 break; 1214 case 0x08: 1215 if (sense->fmt.f71.mdf == 0) 1216 snprintf(service, BUFSIZE, "Repair will disable " 1217 "message display 0x%x on DV", 1218 sense->fmt.f71.md[1]); 1219 else 1220 snprintf(service, BUFSIZE, "Repair will disable " 1221 "message displays (0x%x-0x%x) on DV", 1222 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1223 break; 1224 case 0x09: 1225 snprintf(service, BUFSIZE, "Clean DV"); 1226 break; 1227 default: 1228 snprintf(service, BUFSIZE, "0x%02x", 1229 sense->fmt.f71.smc); 1230 } 1231 1232 dev_warn (&device->cdev->dev, "Device subsystem information: exception" 1233 " %s, service %s\n", exception, service); 1234 out_nomem: 1235 kfree(exception); 1236 kfree(service); 1237 } 1238 1239 /* 1240 * Print standard ERA Message 1241 */ 1242 static void 1243 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) 1244 { 1245 struct tape_3590_sense *sense; 1246 1247 sense = (struct tape_3590_sense *) irb->ecw; 1248 if (sense->mc == 0) 1249 return; 1250 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { 1251 if (tape_3590_msg[sense->mc] != NULL) 1252 dev_warn (&device->cdev->dev, "The tape unit has " 1253 "issued sense message %s\n", 1254 tape_3590_msg[sense->mc]); 1255 else 1256 dev_warn (&device->cdev->dev, "The tape unit has " 1257 "issued an unknown sense message code 0x%x\n", 1258 sense->mc); 1259 return; 1260 } 1261 if (sense->mc == 0xf0) { 1262 /* Standard Media Information Message */ 1263 dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, " 1264 "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc, 1265 sense->fmt.f70.emc, sense->fmt.f70.smc, 1266 sense->fmt.f70.refcode, sense->fmt.f70.mid, 1267 sense->fmt.f70.fid); 1268 tape_3590_print_mim_msg_f0(device, irb); 1269 return; 1270 } 1271 if (sense->mc == 0xf1) { 1272 /* Standard I/O Subsystem Service Information Message */ 1273 dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x," 1274 " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1275 sense->fmt.f71.sev, device->cdev->id.dev_model, 1276 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1277 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1278 sense->fmt.f71.refcode3); 1279 tape_3590_print_io_sim_msg_f1(device, irb); 1280 return; 1281 } 1282 if (sense->mc == 0xf2) { 1283 /* Standard Device Service Information Message */ 1284 dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x" 1285 ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1286 sense->fmt.f71.sev, device->cdev->id.dev_model, 1287 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1288 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1289 sense->fmt.f71.refcode3); 1290 tape_3590_print_dev_sim_msg_f2(device, irb); 1291 return; 1292 } 1293 if (sense->mc == 0xf3) { 1294 /* Standard Library Service Information Message */ 1295 return; 1296 } 1297 dev_warn (&device->cdev->dev, "The tape unit has issued an unknown " 1298 "sense message code %x\n", sense->mc); 1299 } 1300 1301 static int tape_3590_crypt_error(struct tape_device *device, 1302 struct tape_request *request, struct irb *irb) 1303 { 1304 u8 cu_rc; 1305 u16 ekm_rc2; 1306 char *sense; 1307 1308 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; 1309 cu_rc = sense[0]; 1310 ekm_rc2 = *((u16*) &sense[10]); 1311 if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) 1312 /* key not defined on EKM */ 1313 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); 1314 if ((cu_rc == 1) || (cu_rc == 2)) 1315 /* No connection to EKM */ 1316 return tape_3590_erp_basic(device, request, irb, -ENOTCONN); 1317 1318 dev_err (&device->cdev->dev, "The tape unit failed to obtain the " 1319 "encryption key from EKM\n"); 1320 1321 return tape_3590_erp_basic(device, request, irb, -ENOKEY); 1322 } 1323 1324 /* 1325 * 3590 error Recovery routine: 1326 * If possible, it tries to recover from the error. If this is not possible, 1327 * inform the user about the problem. 1328 */ 1329 static int 1330 tape_3590_unit_check(struct tape_device *device, struct tape_request *request, 1331 struct irb *irb) 1332 { 1333 struct tape_3590_sense *sense; 1334 1335 sense = (struct tape_3590_sense *) irb->ecw; 1336 1337 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); 1338 1339 /* 1340 * First check all RC-QRCs where we want to do something special 1341 * - "break": basic error recovery is done 1342 * - "goto out:": just print error message if available 1343 */ 1344 switch (sense->rc_rqc) { 1345 1346 case 0x1110: 1347 tape_3590_print_era_msg(device, irb); 1348 return tape_3590_erp_read_buf_log(device, request, irb); 1349 1350 case 0x2011: 1351 tape_3590_print_era_msg(device, irb); 1352 return tape_3590_erp_read_alternate(device, request, irb); 1353 1354 case 0x2230: 1355 case 0x2231: 1356 tape_3590_print_era_msg(device, irb); 1357 return tape_3590_erp_special_interrupt(device, request, irb); 1358 case 0x2240: 1359 return tape_3590_crypt_error(device, request, irb); 1360 1361 case 0x3010: 1362 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", 1363 device->cdev_id); 1364 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1365 case 0x3012: 1366 DBF_EVENT(2, "(%08x): Forward at End of Partition\n", 1367 device->cdev_id); 1368 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1369 case 0x3020: 1370 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); 1371 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1372 1373 case 0x3122: 1374 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", 1375 device->cdev_id); 1376 return tape_3590_erp_basic(device, request, irb, -EIO); 1377 case 0x3123: 1378 DBF_EVENT(2, "(%08x): Rewind Unload complete\n", 1379 device->cdev_id); 1380 tape_med_state_set(device, MS_UNLOADED); 1381 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1382 return tape_3590_erp_basic(device, request, irb, 0); 1383 1384 case 0x4010: 1385 /* 1386 * print additional msg since default msg 1387 * "device intervention" is not very meaningfull 1388 */ 1389 tape_med_state_set(device, MS_UNLOADED); 1390 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1391 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1392 case 0x4012: /* Device Long Busy */ 1393 /* XXX: Also use long busy handling here? */ 1394 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); 1395 tape_3590_print_era_msg(device, irb); 1396 return tape_3590_erp_basic(device, request, irb, -EBUSY); 1397 case 0x4014: 1398 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); 1399 return tape_3590_erp_long_busy(device, request, irb); 1400 1401 case 0x5010: 1402 if (sense->rac == 0xd0) { 1403 /* Swap */ 1404 tape_3590_print_era_msg(device, irb); 1405 return tape_3590_erp_swap(device, request, irb); 1406 } 1407 if (sense->rac == 0x26) { 1408 /* Read Opposite */ 1409 tape_3590_print_era_msg(device, irb); 1410 return tape_3590_erp_read_opposite(device, request, 1411 irb); 1412 } 1413 return tape_3590_erp_basic(device, request, irb, -EIO); 1414 case 0x5020: 1415 case 0x5021: 1416 case 0x5022: 1417 case 0x5040: 1418 case 0x5041: 1419 case 0x5042: 1420 tape_3590_print_era_msg(device, irb); 1421 return tape_3590_erp_swap(device, request, irb); 1422 1423 case 0x5110: 1424 case 0x5111: 1425 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1426 1427 case 0x5120: 1428 case 0x1120: 1429 tape_med_state_set(device, MS_UNLOADED); 1430 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1431 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1432 1433 case 0x6020: 1434 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1435 1436 case 0x8011: 1437 return tape_3590_erp_basic(device, request, irb, -EPERM); 1438 case 0x8013: 1439 dev_warn (&device->cdev->dev, "A different host has privileged" 1440 " access to the tape unit\n"); 1441 return tape_3590_erp_basic(device, request, irb, -EPERM); 1442 default: 1443 return tape_3590_erp_basic(device, request, irb, -EIO); 1444 } 1445 } 1446 1447 /* 1448 * 3590 interrupt handler: 1449 */ 1450 static int 1451 tape_3590_irq(struct tape_device *device, struct tape_request *request, 1452 struct irb *irb) 1453 { 1454 if (request == NULL) 1455 return tape_3590_unsolicited_irq(device, irb); 1456 1457 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && 1458 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && 1459 (request->op == TO_WRI)) { 1460 /* Write at end of volume */ 1461 DBF_EVENT(2, "End of volume\n"); 1462 return tape_3590_erp_failed(device, request, irb, -ENOSPC); 1463 } 1464 1465 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) 1466 return tape_3590_unit_check(device, request, irb); 1467 1468 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { 1469 if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) { 1470 if (request->op == TO_FSB || request->op == TO_BSB) 1471 request->rescnt++; 1472 else 1473 DBF_EVENT(5, "Unit Exception!\n"); 1474 } 1475 1476 return tape_3590_done(device, request); 1477 } 1478 1479 if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) { 1480 DBF_EVENT(2, "channel end\n"); 1481 return TAPE_IO_PENDING; 1482 } 1483 1484 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 1485 DBF_EVENT(2, "Unit Attention when busy..\n"); 1486 return TAPE_IO_PENDING; 1487 } 1488 1489 DBF_EVENT(6, "xunknownirq\n"); 1490 tape_dump_sense_dbf(device, request, irb); 1491 return TAPE_IO_STOP; 1492 } 1493 1494 1495 static int tape_3590_read_dev_chars(struct tape_device *device, 1496 struct tape_3590_rdc_data *rdc_data) 1497 { 1498 int rc; 1499 struct tape_request *request; 1500 1501 request = tape_alloc_request(1, sizeof(*rdc_data)); 1502 if (IS_ERR(request)) 1503 return PTR_ERR(request); 1504 request->op = TO_RDC; 1505 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), 1506 request->cpdata); 1507 rc = tape_do_io(device, request); 1508 if (rc == 0) 1509 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); 1510 tape_free_request(request); 1511 return rc; 1512 } 1513 1514 /* 1515 * Setup device function 1516 */ 1517 static int 1518 tape_3590_setup_device(struct tape_device *device) 1519 { 1520 int rc; 1521 struct tape_3590_disc_data *data; 1522 struct tape_3590_rdc_data *rdc_data; 1523 1524 DBF_EVENT(6, "3590 device setup\n"); 1525 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); 1526 if (data == NULL) 1527 return -ENOMEM; 1528 data->read_back_op = READ_PREVIOUS; 1529 device->discdata = data; 1530 1531 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); 1532 if (!rdc_data) { 1533 rc = -ENOMEM; 1534 goto fail_kmalloc; 1535 } 1536 rc = tape_3590_read_dev_chars(device, rdc_data); 1537 if (rc) { 1538 DBF_LH(3, "Read device characteristics failed!\n"); 1539 goto fail_rdc_data; 1540 } 1541 rc = tape_std_assign(device); 1542 if (rc) 1543 goto fail_rdc_data; 1544 if (rdc_data->data[31] == 0x13) { 1545 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; 1546 tape_3592_disable_crypt(device); 1547 } else { 1548 DBF_EVENT(6, "Device has NO crypto support\n"); 1549 } 1550 /* Try to find out if medium is loaded */ 1551 rc = tape_3590_sense_medium(device); 1552 if (rc) { 1553 DBF_LH(3, "3590 medium sense returned %d\n", rc); 1554 goto fail_rdc_data; 1555 } 1556 return 0; 1557 1558 fail_rdc_data: 1559 kfree(rdc_data); 1560 fail_kmalloc: 1561 kfree(data); 1562 return rc; 1563 } 1564 1565 /* 1566 * Cleanup device function 1567 */ 1568 static void 1569 tape_3590_cleanup_device(struct tape_device *device) 1570 { 1571 flush_workqueue(tape_3590_wq); 1572 tape_std_unassign(device); 1573 1574 kfree(device->discdata); 1575 device->discdata = NULL; 1576 } 1577 1578 /* 1579 * List of 3590 magnetic tape commands. 1580 */ 1581 static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { 1582 [MTRESET] = tape_std_mtreset, 1583 [MTFSF] = tape_std_mtfsf, 1584 [MTBSF] = tape_std_mtbsf, 1585 [MTFSR] = tape_std_mtfsr, 1586 [MTBSR] = tape_std_mtbsr, 1587 [MTWEOF] = tape_std_mtweof, 1588 [MTREW] = tape_std_mtrew, 1589 [MTOFFL] = tape_std_mtoffl, 1590 [MTNOP] = tape_std_mtnop, 1591 [MTRETEN] = tape_std_mtreten, 1592 [MTBSFM] = tape_std_mtbsfm, 1593 [MTFSFM] = tape_std_mtfsfm, 1594 [MTEOM] = tape_std_mteom, 1595 [MTERASE] = tape_std_mterase, 1596 [MTRAS1] = NULL, 1597 [MTRAS2] = NULL, 1598 [MTRAS3] = NULL, 1599 [MTSETBLK] = tape_std_mtsetblk, 1600 [MTSETDENSITY] = NULL, 1601 [MTSEEK] = tape_3590_mtseek, 1602 [MTTELL] = tape_3590_mttell, 1603 [MTSETDRVBUFFER] = NULL, 1604 [MTFSS] = NULL, 1605 [MTBSS] = NULL, 1606 [MTWSM] = NULL, 1607 [MTLOCK] = NULL, 1608 [MTUNLOCK] = NULL, 1609 [MTLOAD] = tape_std_mtload, 1610 [MTUNLOAD] = tape_std_mtunload, 1611 [MTCOMPRESSION] = tape_std_mtcompression, 1612 [MTSETPART] = NULL, 1613 [MTMKPART] = NULL 1614 }; 1615 1616 /* 1617 * Tape discipline structure for 3590. 1618 */ 1619 static struct tape_discipline tape_discipline_3590 = { 1620 .owner = THIS_MODULE, 1621 .setup_device = tape_3590_setup_device, 1622 .cleanup_device = tape_3590_cleanup_device, 1623 .process_eov = tape_std_process_eov, 1624 .irq = tape_3590_irq, 1625 .read_block = tape_std_read_block, 1626 .write_block = tape_std_write_block, 1627 .ioctl_fn = tape_3590_ioctl, 1628 .mtop_array = tape_3590_mtop 1629 }; 1630 1631 static struct ccw_device_id tape_3590_ids[] = { 1632 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, 1633 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, 1634 { /* end of list */ } 1635 }; 1636 1637 static int 1638 tape_3590_online(struct ccw_device *cdev) 1639 { 1640 return tape_generic_online(dev_get_drvdata(&cdev->dev), 1641 &tape_discipline_3590); 1642 } 1643 1644 static struct ccw_driver tape_3590_driver = { 1645 .driver = { 1646 .name = "tape_3590", 1647 .owner = THIS_MODULE, 1648 }, 1649 .ids = tape_3590_ids, 1650 .probe = tape_generic_probe, 1651 .remove = tape_generic_remove, 1652 .set_offline = tape_generic_offline, 1653 .set_online = tape_3590_online, 1654 .int_class = IRQIO_TAP, 1655 }; 1656 1657 /* 1658 * Setup discipline structure. 1659 */ 1660 static int 1661 tape_3590_init(void) 1662 { 1663 int rc; 1664 1665 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); 1666 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); 1667 #ifdef DBF_LIKE_HELL 1668 debug_set_level(TAPE_DBF_AREA, 6); 1669 #endif 1670 1671 DBF_EVENT(3, "3590 init\n"); 1672 1673 tape_3590_wq = alloc_workqueue("tape_3590", 0, 0); 1674 if (!tape_3590_wq) 1675 return -ENOMEM; 1676 1677 /* Register driver for 3590 tapes. */ 1678 rc = ccw_driver_register(&tape_3590_driver); 1679 if (rc) { 1680 destroy_workqueue(tape_3590_wq); 1681 DBF_EVENT(3, "3590 init failed\n"); 1682 } else 1683 DBF_EVENT(3, "3590 registered\n"); 1684 return rc; 1685 } 1686 1687 static void 1688 tape_3590_exit(void) 1689 { 1690 ccw_driver_unregister(&tape_3590_driver); 1691 destroy_workqueue(tape_3590_wq); 1692 debug_unregister(TAPE_DBF_AREA); 1693 } 1694 1695 MODULE_DEVICE_TABLE(ccw, tape_3590_ids); 1696 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); 1697 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); 1698 MODULE_LICENSE("GPL"); 1699 1700 module_init(tape_3590_init); 1701 module_exit(tape_3590_exit); 1702