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 pr_fmt(fmt) "tape_3590: " fmt 12 13 #include <linux/export.h> 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 Attention Msg 554 * This should be done after an interrupt with attention bit (0x80) 555 * in device state. 556 * 557 * After a "read attention message" request there are two possible 558 * results: 559 * 560 * 1. A unit check is presented, when attention sense is present (e.g. when 561 * a medium has been unloaded). The attention sense comes then 562 * together with the unit check. The recovery action is either "retry" 563 * (in case there is an attention message pending) or "permanent error". 564 * 565 * 2. The attention msg is written to the "read subsystem data" buffer. 566 * In this case we probably should print it to the console. 567 */ 568 static void tape_3590_read_attmsg_async(struct tape_device *device) 569 { 570 struct tape_request *request; 571 char *buf; 572 573 request = tape_alloc_request(3, 4096); 574 if (IS_ERR(request)) 575 return; 576 request->op = TO_READ_ATTMSG; 577 buf = request->cpdata; 578 buf[0] = PREP_RD_SS_DATA; 579 buf[6] = RD_ATTMSG; /* read att msg */ 580 tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf); 581 tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12); 582 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 583 tape_do_io_async_free(device, request); 584 } 585 586 /* 587 * These functions are used to schedule follow-up actions from within an 588 * interrupt context (like unsolicited interrupts). 589 * Note: the work handler is called by the system work queue. The tape 590 * commands started by the handler need to be asynchrounous, otherwise 591 * a deadlock can occur e.g. in case of a deferred cc=1 (see __tape_do_irq). 592 */ 593 struct work_handler_data { 594 struct tape_device *device; 595 enum tape_op op; 596 struct work_struct work; 597 }; 598 599 static void 600 tape_3590_work_handler(struct work_struct *work) 601 { 602 struct work_handler_data *p = 603 container_of(work, struct work_handler_data, work); 604 605 switch (p->op) { 606 case TO_MSEN: 607 tape_3590_sense_medium_async(p->device); 608 break; 609 case TO_READ_ATTMSG: 610 tape_3590_read_attmsg_async(p->device); 611 break; 612 case TO_CRYPT_ON: 613 tape_3592_enable_crypt_async(p->device); 614 break; 615 case TO_CRYPT_OFF: 616 tape_3592_disable_crypt_async(p->device); 617 break; 618 default: 619 DBF_EVENT(3, "T3590: work handler undefined for " 620 "operation 0x%02x\n", p->op); 621 } 622 tape_put_device(p->device); 623 kfree(p); 624 } 625 626 static int 627 tape_3590_schedule_work(struct tape_device *device, enum tape_op op) 628 { 629 struct work_handler_data *p; 630 631 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) 632 return -ENOMEM; 633 634 INIT_WORK(&p->work, tape_3590_work_handler); 635 636 p->device = tape_get_device(device); 637 p->op = op; 638 639 queue_work(tape_3590_wq, &p->work); 640 return 0; 641 } 642 643 static void tape_3590_med_state_set(struct tape_device *device, 644 struct tape_3590_med_sense *sense) 645 { 646 struct tape390_crypt_info *c_info; 647 648 c_info = &TAPE_3590_CRYPT_INFO(device); 649 650 DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst); 651 switch (sense->macst) { 652 case 0x04: 653 case 0x05: 654 case 0x06: 655 tape_med_state_set(device, MS_UNLOADED); 656 TAPE_3590_CRYPT_INFO(device).medium_status = 0; 657 return; 658 case 0x08: 659 case 0x09: 660 tape_med_state_set(device, MS_LOADED); 661 break; 662 default: 663 tape_med_state_set(device, MS_UNKNOWN); 664 return; 665 } 666 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; 667 if (sense->flags & MSENSE_CRYPT_MASK) { 668 DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags); 669 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK; 670 } else { 671 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags); 672 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK; 673 } 674 } 675 676 /* 677 * The done handler is called at device/channel end and wakes up the sleeping 678 * process 679 */ 680 static int 681 tape_3590_done(struct tape_device *device, struct tape_request *request) 682 { 683 684 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); 685 686 switch (request->op) { 687 case TO_BSB: 688 case TO_BSF: 689 case TO_DSE: 690 case TO_FSB: 691 case TO_FSF: 692 case TO_LBL: 693 case TO_RFO: 694 case TO_RBA: 695 case TO_REW: 696 case TO_WRI: 697 case TO_WTM: 698 case TO_BLOCK: 699 case TO_LOAD: 700 tape_med_state_set(device, MS_LOADED); 701 break; 702 case TO_RUN: 703 tape_med_state_set(device, MS_UNLOADED); 704 tape_3590_schedule_work(device, TO_CRYPT_OFF); 705 break; 706 case TO_MSEN: 707 tape_3590_med_state_set(device, request->cpdata); 708 break; 709 case TO_CRYPT_ON: 710 TAPE_3590_CRYPT_INFO(device).status 711 |= TAPE390_CRYPT_ON_MASK; 712 *(device->modeset_byte) |= 0x03; 713 break; 714 case TO_CRYPT_OFF: 715 TAPE_3590_CRYPT_INFO(device).status 716 &= ~TAPE390_CRYPT_ON_MASK; 717 *(device->modeset_byte) &= ~0x03; 718 break; 719 case TO_RBI: /* RBI seems to succeed even without medium loaded. */ 720 case TO_NOP: /* Same to NOP. */ 721 case TO_READ_CONFIG: 722 case TO_READ_ATTMSG: 723 case TO_DIS: 724 case TO_ASSIGN: 725 case TO_UNASSIGN: 726 case TO_SIZE: 727 case TO_KEKL_SET: 728 case TO_KEKL_QUERY: 729 case TO_RDC: 730 break; 731 } 732 return TAPE_IO_SUCCESS; 733 } 734 735 /* 736 * This function is called, when error recovery was successful 737 */ 738 static inline int 739 tape_3590_erp_succeeded(struct tape_device *device, struct tape_request *request) 740 { 741 DBF_EVENT(3, "Error Recovery successful for %s\n", 742 tape_op_verbose[request->op]); 743 return tape_3590_done(device, request); 744 } 745 746 /* 747 * This function is called, when error recovery was not successful 748 */ 749 static inline int 750 tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, 751 struct irb *irb, int rc) 752 { 753 DBF_EVENT(3, "Error Recovery failed for %s\n", 754 tape_op_verbose[request->op]); 755 tape_dump_sense_dbf(device, request, irb); 756 return rc; 757 } 758 759 /* 760 * Error Recovery do retry 761 */ 762 static inline int 763 tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, 764 struct irb *irb) 765 { 766 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); 767 tape_dump_sense_dbf(device, request, irb); 768 return TAPE_IO_RETRY; 769 } 770 771 /* 772 * Handle unsolicited interrupts 773 */ 774 static int 775 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) 776 { 777 if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END) 778 /* Probably result of halt ssch */ 779 return TAPE_IO_PENDING; 780 else if (irb->scsw.cmd.dstat == 0x85) 781 /* Device Ready */ 782 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); 783 else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 784 tape_3590_schedule_work(device, TO_READ_ATTMSG); 785 } else { 786 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); 787 tape_dump_sense_dbf(device, NULL, irb); 788 } 789 /* check medium state */ 790 tape_3590_schedule_work(device, TO_MSEN); 791 return TAPE_IO_SUCCESS; 792 } 793 794 /* 795 * Basic Recovery routine 796 */ 797 static int 798 tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, 799 struct irb *irb, int rc) 800 { 801 struct tape_3590_sense *sense; 802 803 sense = (struct tape_3590_sense *) irb->ecw; 804 805 switch (sense->bra) { 806 case SENSE_BRA_PER: 807 return tape_3590_erp_failed(device, request, irb, rc); 808 case SENSE_BRA_CONT: 809 return tape_3590_erp_succeeded(device, request); 810 case SENSE_BRA_RE: 811 return tape_3590_erp_retry(device, request, irb); 812 case SENSE_BRA_DRE: 813 return tape_3590_erp_failed(device, request, irb, rc); 814 default: 815 BUG(); 816 return TAPE_IO_STOP; 817 } 818 } 819 820 /* 821 * RDL: Read Device (buffered) log 822 */ 823 static int 824 tape_3590_erp_read_buf_log(struct tape_device *device, 825 struct tape_request *request, struct irb *irb) 826 { 827 /* 828 * We just do the basic error recovery at the moment (retry). 829 * Perhaps in the future, we read the log and dump it somewhere... 830 */ 831 return tape_3590_erp_basic(device, request, irb, -EIO); 832 } 833 834 /* 835 * SWAP: Swap Devices 836 */ 837 static int 838 tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, 839 struct irb *irb) 840 { 841 /* 842 * This error recovery should swap the tapes 843 * if the original has a problem. The operation 844 * should proceed with the new tape... this 845 * should probably be done in user space! 846 */ 847 dev_warn (&device->cdev->dev, "The tape medium must be loaded into a " 848 "different tape unit\n"); 849 return tape_3590_erp_basic(device, request, irb, -EIO); 850 } 851 852 /* 853 * LBY: Long Busy 854 */ 855 static int 856 tape_3590_erp_long_busy(struct tape_device *device, 857 struct tape_request *request, struct irb *irb) 858 { 859 DBF_EVENT(6, "Device is busy\n"); 860 return TAPE_IO_LONG_BUSY; 861 } 862 863 /* 864 * SPI: Special Intercept 865 */ 866 static int 867 tape_3590_erp_special_interrupt(struct tape_device *device, 868 struct tape_request *request, struct irb *irb) 869 { 870 return tape_3590_erp_basic(device, request, irb, -EIO); 871 } 872 873 /* 874 * Print an MIM (Media Information Message) (message code f0) 875 */ 876 static void 877 tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) 878 { 879 struct tape_3590_sense *sense; 880 char *exception, *service; 881 882 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 883 service = kmalloc(BUFSIZE, GFP_ATOMIC); 884 885 if (!exception || !service) 886 goto out_nomem; 887 888 sense = (struct tape_3590_sense *) irb->ecw; 889 /* Exception Message */ 890 switch (sense->fmt.f70.emc) { 891 case 0x02: 892 snprintf(exception, BUFSIZE, "Data degraded"); 893 break; 894 case 0x03: 895 snprintf(exception, BUFSIZE, "Data degraded in partition %i", 896 sense->fmt.f70.mp); 897 break; 898 case 0x04: 899 snprintf(exception, BUFSIZE, "Medium degraded"); 900 break; 901 case 0x05: 902 snprintf(exception, BUFSIZE, "Medium degraded in partition %i", 903 sense->fmt.f70.mp); 904 break; 905 case 0x06: 906 snprintf(exception, BUFSIZE, "Block 0 Error"); 907 break; 908 case 0x07: 909 snprintf(exception, BUFSIZE, "Medium Exception 0x%02x", 910 sense->fmt.f70.md); 911 break; 912 default: 913 snprintf(exception, BUFSIZE, "0x%02x", 914 sense->fmt.f70.emc); 915 break; 916 } 917 /* Service Message */ 918 switch (sense->fmt.f70.smc) { 919 case 0x02: 920 snprintf(service, BUFSIZE, "Reference Media maintenance " 921 "procedure %i", sense->fmt.f70.md); 922 break; 923 default: 924 snprintf(service, BUFSIZE, "0x%02x", 925 sense->fmt.f70.smc); 926 break; 927 } 928 929 dev_warn (&device->cdev->dev, "Tape media information: exception %s, " 930 "service %s\n", exception, service); 931 932 out_nomem: 933 kfree(exception); 934 kfree(service); 935 } 936 937 /* 938 * Print an I/O Subsystem Service Information Message (message code f1) 939 */ 940 static void 941 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) 942 { 943 struct tape_3590_sense *sense; 944 char *exception, *service; 945 946 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 947 service = kmalloc(BUFSIZE, GFP_ATOMIC); 948 949 if (!exception || !service) 950 goto out_nomem; 951 952 sense = (struct tape_3590_sense *) irb->ecw; 953 /* Exception Message */ 954 switch (sense->fmt.f71.emc) { 955 case 0x01: 956 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 957 break; 958 case 0x02: 959 snprintf(exception, BUFSIZE, "CU Exception - no performance " 960 "impact"); 961 break; 962 case 0x03: 963 snprintf(exception, BUFSIZE, "CU Exception on channel " 964 "interface 0x%02x", sense->fmt.f71.md[0]); 965 break; 966 case 0x04: 967 snprintf(exception, BUFSIZE, "CU Exception on device path " 968 "0x%02x", sense->fmt.f71.md[0]); 969 break; 970 case 0x05: 971 snprintf(exception, BUFSIZE, "CU Exception on library path " 972 "0x%02x", sense->fmt.f71.md[0]); 973 break; 974 case 0x06: 975 snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x", 976 sense->fmt.f71.md[0]); 977 break; 978 case 0x07: 979 snprintf(exception, BUFSIZE, "CU Exception on partition " 980 "0x%02x", sense->fmt.f71.md[0]); 981 break; 982 default: 983 snprintf(exception, BUFSIZE, "0x%02x", 984 sense->fmt.f71.emc); 985 } 986 /* Service Message */ 987 switch (sense->fmt.f71.smc) { 988 case 0x01: 989 snprintf(service, BUFSIZE, "Repair impact is unknown"); 990 break; 991 case 0x02: 992 snprintf(service, BUFSIZE, "Repair will not impact cu " 993 "performance"); 994 break; 995 case 0x03: 996 if (sense->fmt.f71.mdf == 0) 997 snprintf(service, BUFSIZE, "Repair will disable node " 998 "0x%x on CU", sense->fmt.f71.md[1]); 999 else 1000 snprintf(service, BUFSIZE, "Repair will disable " 1001 "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1], 1002 sense->fmt.f71.md[2]); 1003 break; 1004 case 0x04: 1005 if (sense->fmt.f71.mdf == 0) 1006 snprintf(service, BUFSIZE, "Repair will disable " 1007 "channel path 0x%x on CU", 1008 sense->fmt.f71.md[1]); 1009 else 1010 snprintf(service, BUFSIZE, "Repair will disable channel" 1011 " paths (0x%x-0x%x) on CU", 1012 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1013 break; 1014 case 0x05: 1015 if (sense->fmt.f71.mdf == 0) 1016 snprintf(service, BUFSIZE, "Repair will disable device" 1017 " path 0x%x on CU", sense->fmt.f71.md[1]); 1018 else 1019 snprintf(service, BUFSIZE, "Repair will disable device" 1020 " paths (0x%x-0x%x) on CU", 1021 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1022 break; 1023 case 0x06: 1024 if (sense->fmt.f71.mdf == 0) 1025 snprintf(service, BUFSIZE, "Repair will disable " 1026 "library path 0x%x on CU", 1027 sense->fmt.f71.md[1]); 1028 else 1029 snprintf(service, BUFSIZE, "Repair will disable " 1030 "library paths (0x%x-0x%x) on CU", 1031 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1032 break; 1033 case 0x07: 1034 snprintf(service, BUFSIZE, "Repair will disable access to CU"); 1035 break; 1036 default: 1037 snprintf(service, BUFSIZE, "0x%02x", 1038 sense->fmt.f71.smc); 1039 } 1040 1041 dev_warn (&device->cdev->dev, "I/O subsystem information: exception" 1042 " %s, service %s\n", exception, service); 1043 out_nomem: 1044 kfree(exception); 1045 kfree(service); 1046 } 1047 1048 /* 1049 * Print an Device Subsystem Service Information Message (message code f2) 1050 */ 1051 static void 1052 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) 1053 { 1054 struct tape_3590_sense *sense; 1055 char *exception, *service; 1056 1057 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1058 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1059 1060 if (!exception || !service) 1061 goto out_nomem; 1062 1063 sense = (struct tape_3590_sense *) irb->ecw; 1064 /* Exception Message */ 1065 switch (sense->fmt.f71.emc) { 1066 case 0x01: 1067 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1068 break; 1069 case 0x02: 1070 snprintf(exception, BUFSIZE, "DV Exception - no performance" 1071 " impact"); 1072 break; 1073 case 0x03: 1074 snprintf(exception, BUFSIZE, "DV Exception on channel " 1075 "interface 0x%02x", sense->fmt.f71.md[0]); 1076 break; 1077 case 0x04: 1078 snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x", 1079 sense->fmt.f71.md[0]); 1080 break; 1081 case 0x05: 1082 snprintf(exception, BUFSIZE, "DV Exception on message display" 1083 " 0x%02x", sense->fmt.f71.md[0]); 1084 break; 1085 case 0x06: 1086 snprintf(exception, BUFSIZE, "DV Exception in tape path"); 1087 break; 1088 case 0x07: 1089 snprintf(exception, BUFSIZE, "DV Exception in drive"); 1090 break; 1091 default: 1092 snprintf(exception, BUFSIZE, "0x%02x", 1093 sense->fmt.f71.emc); 1094 } 1095 /* Service Message */ 1096 switch (sense->fmt.f71.smc) { 1097 case 0x01: 1098 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1099 break; 1100 case 0x02: 1101 snprintf(service, BUFSIZE, "Repair will not impact device " 1102 "performance"); 1103 break; 1104 case 0x03: 1105 if (sense->fmt.f71.mdf == 0) 1106 snprintf(service, BUFSIZE, "Repair will disable " 1107 "channel path 0x%x on DV", 1108 sense->fmt.f71.md[1]); 1109 else 1110 snprintf(service, BUFSIZE, "Repair will disable " 1111 "channel path (0x%x-0x%x) on DV", 1112 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1113 break; 1114 case 0x04: 1115 if (sense->fmt.f71.mdf == 0) 1116 snprintf(service, BUFSIZE, "Repair will disable " 1117 "interface 0x%x on DV", sense->fmt.f71.md[1]); 1118 else 1119 snprintf(service, BUFSIZE, "Repair will disable " 1120 "interfaces (0x%x-0x%x) on DV", 1121 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1122 break; 1123 case 0x05: 1124 if (sense->fmt.f71.mdf == 0) 1125 snprintf(service, BUFSIZE, "Repair will disable loader" 1126 " 0x%x on DV", sense->fmt.f71.md[1]); 1127 else 1128 snprintf(service, BUFSIZE, "Repair will disable loader" 1129 " (0x%x-0x%x) on DV", 1130 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1131 break; 1132 case 0x07: 1133 snprintf(service, BUFSIZE, "Repair will disable access to DV"); 1134 break; 1135 case 0x08: 1136 if (sense->fmt.f71.mdf == 0) 1137 snprintf(service, BUFSIZE, "Repair will disable " 1138 "message display 0x%x on DV", 1139 sense->fmt.f71.md[1]); 1140 else 1141 snprintf(service, BUFSIZE, "Repair will disable " 1142 "message displays (0x%x-0x%x) on DV", 1143 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1144 break; 1145 case 0x09: 1146 snprintf(service, BUFSIZE, "Clean DV"); 1147 break; 1148 default: 1149 snprintf(service, BUFSIZE, "0x%02x", 1150 sense->fmt.f71.smc); 1151 } 1152 1153 dev_warn (&device->cdev->dev, "Device subsystem information: exception" 1154 " %s, service %s\n", exception, service); 1155 out_nomem: 1156 kfree(exception); 1157 kfree(service); 1158 } 1159 1160 /* 1161 * Print standard ERA Message 1162 */ 1163 static void 1164 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) 1165 { 1166 struct tape_3590_sense *sense; 1167 1168 sense = (struct tape_3590_sense *) irb->ecw; 1169 if (sense->mc == 0) 1170 return; 1171 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { 1172 if (tape_3590_msg[sense->mc] != NULL) 1173 dev_warn (&device->cdev->dev, "The tape unit has " 1174 "issued sense message %s\n", 1175 tape_3590_msg[sense->mc]); 1176 else 1177 dev_warn (&device->cdev->dev, "The tape unit has " 1178 "issued an unknown sense message code 0x%x\n", 1179 sense->mc); 1180 return; 1181 } 1182 if (sense->mc == 0xf0) { 1183 /* Standard Media Information Message */ 1184 dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, " 1185 "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc, 1186 sense->fmt.f70.emc, sense->fmt.f70.smc, 1187 sense->fmt.f70.refcode, sense->fmt.f70.mid, 1188 sense->fmt.f70.fid); 1189 tape_3590_print_mim_msg_f0(device, irb); 1190 return; 1191 } 1192 if (sense->mc == 0xf1) { 1193 /* Standard I/O Subsystem Service Information Message */ 1194 dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x," 1195 " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1196 sense->fmt.f71.sev, device->cdev->id.dev_model, 1197 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1198 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1199 sense->fmt.f71.refcode3); 1200 tape_3590_print_io_sim_msg_f1(device, irb); 1201 return; 1202 } 1203 if (sense->mc == 0xf2) { 1204 /* Standard Device Service Information Message */ 1205 dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x" 1206 ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1207 sense->fmt.f71.sev, device->cdev->id.dev_model, 1208 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1209 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1210 sense->fmt.f71.refcode3); 1211 tape_3590_print_dev_sim_msg_f2(device, irb); 1212 return; 1213 } 1214 if (sense->mc == 0xf3) { 1215 /* Standard Library Service Information Message */ 1216 return; 1217 } 1218 dev_warn (&device->cdev->dev, "The tape unit has issued an unknown " 1219 "sense message code %x\n", sense->mc); 1220 } 1221 1222 static int tape_3590_crypt_error(struct tape_device *device, 1223 struct tape_request *request, struct irb *irb) 1224 { 1225 u8 cu_rc; 1226 u16 ekm_rc2; 1227 char *sense; 1228 1229 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; 1230 cu_rc = sense[0]; 1231 ekm_rc2 = *((u16*) &sense[10]); 1232 if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) 1233 /* key not defined on EKM */ 1234 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); 1235 if ((cu_rc == 1) || (cu_rc == 2)) 1236 /* No connection to EKM */ 1237 return tape_3590_erp_basic(device, request, irb, -ENOTCONN); 1238 1239 dev_err (&device->cdev->dev, "The tape unit failed to obtain the " 1240 "encryption key from EKM\n"); 1241 1242 return tape_3590_erp_basic(device, request, irb, -ENOKEY); 1243 } 1244 1245 /* 1246 * 3590 error Recovery routine: 1247 * If possible, it tries to recover from the error. If this is not possible, 1248 * inform the user about the problem. 1249 */ 1250 static int 1251 tape_3590_unit_check(struct tape_device *device, struct tape_request *request, 1252 struct irb *irb) 1253 { 1254 struct tape_3590_sense *sense; 1255 1256 sense = (struct tape_3590_sense *) irb->ecw; 1257 1258 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); 1259 1260 /* 1261 * First check all RC-QRCs where we want to do something special 1262 * - "break": basic error recovery is done 1263 * - "goto out:": just print error message if available 1264 */ 1265 switch (sense->rc_rqc) { 1266 1267 case 0x1110: 1268 tape_3590_print_era_msg(device, irb); 1269 return tape_3590_erp_read_buf_log(device, request, irb); 1270 1271 case 0x2230: 1272 case 0x2231: 1273 tape_3590_print_era_msg(device, irb); 1274 return tape_3590_erp_special_interrupt(device, request, irb); 1275 case 0x2240: 1276 return tape_3590_crypt_error(device, request, irb); 1277 1278 case 0x3010: 1279 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", 1280 device->cdev_id); 1281 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1282 case 0x3012: 1283 DBF_EVENT(2, "(%08x): Forward at End of Partition\n", 1284 device->cdev_id); 1285 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1286 case 0x3020: 1287 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); 1288 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1289 1290 case 0x3122: 1291 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", 1292 device->cdev_id); 1293 return tape_3590_erp_basic(device, request, irb, -EIO); 1294 case 0x3123: 1295 DBF_EVENT(2, "(%08x): Rewind Unload complete\n", 1296 device->cdev_id); 1297 tape_med_state_set(device, MS_UNLOADED); 1298 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1299 return tape_3590_erp_basic(device, request, irb, 0); 1300 1301 case 0x4010: 1302 /* 1303 * print additional msg since default msg 1304 * "device intervention" is not very meaningfull 1305 */ 1306 tape_med_state_set(device, MS_UNLOADED); 1307 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1308 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1309 case 0x4012: /* Device Long Busy */ 1310 /* XXX: Also use long busy handling here? */ 1311 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); 1312 tape_3590_print_era_msg(device, irb); 1313 return tape_3590_erp_basic(device, request, irb, -EBUSY); 1314 case 0x4014: 1315 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); 1316 return tape_3590_erp_long_busy(device, request, irb); 1317 1318 case 0x5010: 1319 if (sense->rac == 0xd0) { 1320 /* Swap */ 1321 tape_3590_print_era_msg(device, irb); 1322 return tape_3590_erp_swap(device, request, irb); 1323 } 1324 return tape_3590_erp_basic(device, request, irb, -EIO); 1325 case 0x5020: 1326 case 0x5021: 1327 case 0x5022: 1328 case 0x5040: 1329 case 0x5041: 1330 case 0x5042: 1331 tape_3590_print_era_msg(device, irb); 1332 return tape_3590_erp_swap(device, request, irb); 1333 1334 case 0x5110: 1335 case 0x5111: 1336 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1337 1338 case 0x5120: 1339 case 0x1120: 1340 tape_med_state_set(device, MS_UNLOADED); 1341 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1342 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1343 1344 case 0x6020: 1345 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1346 1347 case 0x8011: 1348 return tape_3590_erp_basic(device, request, irb, -EPERM); 1349 case 0x8013: 1350 dev_warn (&device->cdev->dev, "A different host has privileged" 1351 " access to the tape unit\n"); 1352 return tape_3590_erp_basic(device, request, irb, -EPERM); 1353 default: 1354 return tape_3590_erp_basic(device, request, irb, -EIO); 1355 } 1356 } 1357 1358 /* 1359 * 3590 interrupt handler: 1360 */ 1361 static int 1362 tape_3590_irq(struct tape_device *device, struct tape_request *request, 1363 struct irb *irb) 1364 { 1365 if (request == NULL) 1366 return tape_3590_unsolicited_irq(device, irb); 1367 1368 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && 1369 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && 1370 (request->op == TO_WRI)) { 1371 /* Write at end of volume */ 1372 DBF_EVENT(2, "End of volume\n"); 1373 return tape_3590_erp_failed(device, request, irb, -ENOSPC); 1374 } 1375 1376 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) 1377 return tape_3590_unit_check(device, request, irb); 1378 1379 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { 1380 if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) { 1381 if (request->op == TO_FSB || request->op == TO_BSB) 1382 request->rescnt++; 1383 else 1384 DBF_EVENT(5, "Unit Exception!\n"); 1385 } 1386 1387 return tape_3590_done(device, request); 1388 } 1389 1390 if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) { 1391 DBF_EVENT(2, "channel end\n"); 1392 return TAPE_IO_PENDING; 1393 } 1394 1395 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 1396 DBF_EVENT(2, "Unit Attention when busy..\n"); 1397 return TAPE_IO_PENDING; 1398 } 1399 1400 DBF_EVENT(6, "xunknownirq\n"); 1401 tape_dump_sense_dbf(device, request, irb); 1402 return TAPE_IO_STOP; 1403 } 1404 1405 1406 static int tape_3590_read_dev_chars(struct tape_device *device, 1407 struct tape_3590_rdc_data *rdc_data) 1408 { 1409 int rc; 1410 struct tape_request *request; 1411 1412 request = tape_alloc_request(1, sizeof(*rdc_data)); 1413 if (IS_ERR(request)) 1414 return PTR_ERR(request); 1415 request->op = TO_RDC; 1416 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), 1417 request->cpdata); 1418 rc = tape_do_io(device, request); 1419 if (rc == 0) 1420 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); 1421 tape_free_request(request); 1422 return rc; 1423 } 1424 1425 /* 1426 * Setup device function 1427 */ 1428 static int 1429 tape_3590_setup_device(struct tape_device *device) 1430 { 1431 int rc; 1432 struct tape_3590_disc_data *data; 1433 struct tape_3590_rdc_data *rdc_data; 1434 1435 DBF_EVENT(6, "3590 device setup\n"); 1436 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); 1437 if (data == NULL) 1438 return -ENOMEM; 1439 data->read_back_op = READ_PREVIOUS; 1440 device->discdata = data; 1441 1442 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); 1443 if (!rdc_data) { 1444 rc = -ENOMEM; 1445 goto fail_kmalloc; 1446 } 1447 rc = tape_3590_read_dev_chars(device, rdc_data); 1448 if (rc) { 1449 DBF_LH(3, "Read device characteristics failed!\n"); 1450 goto fail_rdc_data; 1451 } 1452 rc = tape_std_assign(device); 1453 if (rc) 1454 goto fail_rdc_data; 1455 if (rdc_data->data[31] == 0x13) { 1456 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; 1457 tape_3592_disable_crypt(device); 1458 } else { 1459 DBF_EVENT(6, "Device has NO crypto support\n"); 1460 } 1461 /* Try to find out if medium is loaded */ 1462 rc = tape_3590_sense_medium(device); 1463 if (rc) { 1464 DBF_LH(3, "3590 medium sense returned %d\n", rc); 1465 goto fail_rdc_data; 1466 } 1467 return 0; 1468 1469 fail_rdc_data: 1470 kfree(rdc_data); 1471 fail_kmalloc: 1472 kfree(data); 1473 return rc; 1474 } 1475 1476 /* 1477 * Cleanup device function 1478 */ 1479 static void 1480 tape_3590_cleanup_device(struct tape_device *device) 1481 { 1482 flush_workqueue(tape_3590_wq); 1483 tape_std_unassign(device); 1484 1485 kfree(device->discdata); 1486 device->discdata = NULL; 1487 } 1488 1489 /* 1490 * List of 3590 magnetic tape commands. 1491 */ 1492 static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { 1493 [MTRESET] = tape_std_mtreset, 1494 [MTFSF] = tape_std_mtfsf, 1495 [MTBSF] = tape_std_mtbsf, 1496 [MTFSR] = tape_std_mtfsr, 1497 [MTBSR] = tape_std_mtbsr, 1498 [MTWEOF] = tape_std_mtweof, 1499 [MTREW] = tape_std_mtrew, 1500 [MTOFFL] = tape_std_mtoffl, 1501 [MTNOP] = tape_std_mtnop, 1502 [MTRETEN] = tape_std_mtreten, 1503 [MTBSFM] = tape_std_mtbsfm, 1504 [MTFSFM] = tape_std_mtfsfm, 1505 [MTEOM] = tape_std_mteom, 1506 [MTERASE] = tape_std_mterase, 1507 [MTRAS1] = NULL, 1508 [MTRAS2] = NULL, 1509 [MTRAS3] = NULL, 1510 [MTSETBLK] = tape_std_mtsetblk, 1511 [MTSETDENSITY] = NULL, 1512 [MTSEEK] = tape_3590_mtseek, 1513 [MTTELL] = tape_3590_mttell, 1514 [MTSETDRVBUFFER] = NULL, 1515 [MTFSS] = NULL, 1516 [MTBSS] = NULL, 1517 [MTWSM] = NULL, 1518 [MTLOCK] = NULL, 1519 [MTUNLOCK] = NULL, 1520 [MTLOAD] = tape_std_mtload, 1521 [MTUNLOAD] = tape_std_mtunload, 1522 [MTCOMPRESSION] = tape_std_mtcompression, 1523 [MTSETPART] = NULL, 1524 [MTMKPART] = NULL 1525 }; 1526 1527 /* 1528 * Tape discipline structure for 3590. 1529 */ 1530 static struct tape_discipline tape_discipline_3590 = { 1531 .owner = THIS_MODULE, 1532 .setup_device = tape_3590_setup_device, 1533 .cleanup_device = tape_3590_cleanup_device, 1534 .process_eov = tape_std_process_eov, 1535 .irq = tape_3590_irq, 1536 .read_block = tape_std_read_block, 1537 .write_block = tape_std_write_block, 1538 .ioctl_fn = tape_3590_ioctl, 1539 .mtop_array = tape_3590_mtop 1540 }; 1541 1542 static struct ccw_device_id tape_3590_ids[] = { 1543 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, 1544 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, 1545 { /* end of list */ } 1546 }; 1547 1548 static int 1549 tape_3590_online(struct ccw_device *cdev) 1550 { 1551 return tape_generic_online(dev_get_drvdata(&cdev->dev), 1552 &tape_discipline_3590); 1553 } 1554 1555 static struct ccw_driver tape_3590_driver = { 1556 .driver = { 1557 .name = "tape_3590", 1558 .owner = THIS_MODULE, 1559 }, 1560 .ids = tape_3590_ids, 1561 .probe = tape_generic_probe, 1562 .remove = tape_generic_remove, 1563 .set_offline = tape_generic_offline, 1564 .set_online = tape_3590_online, 1565 .int_class = IRQIO_TAP, 1566 }; 1567 1568 /* 1569 * Setup discipline structure. 1570 */ 1571 static int 1572 tape_3590_init(void) 1573 { 1574 int rc; 1575 1576 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); 1577 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); 1578 #ifdef DBF_LIKE_HELL 1579 debug_set_level(TAPE_DBF_AREA, 6); 1580 #endif 1581 1582 DBF_EVENT(3, "3590 init\n"); 1583 1584 tape_3590_wq = alloc_workqueue("tape_3590", WQ_PERCPU, 0); 1585 if (!tape_3590_wq) 1586 return -ENOMEM; 1587 1588 /* Register driver for 3590 tapes. */ 1589 rc = ccw_driver_register(&tape_3590_driver); 1590 if (rc) { 1591 destroy_workqueue(tape_3590_wq); 1592 DBF_EVENT(3, "3590 init failed\n"); 1593 } else 1594 DBF_EVENT(3, "3590 registered\n"); 1595 return rc; 1596 } 1597 1598 static void 1599 tape_3590_exit(void) 1600 { 1601 ccw_driver_unregister(&tape_3590_driver); 1602 destroy_workqueue(tape_3590_wq); 1603 debug_unregister(TAPE_DBF_AREA); 1604 } 1605 1606 MODULE_DEVICE_TABLE(ccw, tape_3590_ids); 1607 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); 1608 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); 1609 MODULE_LICENSE("GPL"); 1610 1611 module_init(tape_3590_init); 1612 module_exit(tape_3590_exit); 1613