1 /* 2 * tape device discipline for 3590 tapes. 3 * 4 * Copyright IBM Corp. 2001, 2009 5 * Author(s): Stefan Bader <shbader@de.ibm.com> 6 * Michael Holzheu <holzheu@de.ibm.com> 7 * Martin Schwidefsky <schwidefsky@de.ibm.com> 8 */ 9 10 #define KMSG_COMPONENT "tape_3590" 11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 12 13 #include <linux/module.h> 14 #include <linux/slab.h> 15 #include <linux/init.h> 16 #include <linux/bio.h> 17 #include <asm/ebcdic.h> 18 19 #define TAPE_DBF_AREA tape_3590_dbf 20 #define BUFSIZE 512 /* size of buffers for dynamic generated messages */ 21 22 #include "tape.h" 23 #include "tape_std.h" 24 #include "tape_3590.h" 25 26 static struct workqueue_struct *tape_3590_wq; 27 28 /* 29 * Pointer to debug area. 30 */ 31 debug_info_t *TAPE_DBF_AREA = NULL; 32 EXPORT_SYMBOL(TAPE_DBF_AREA); 33 34 /******************************************************************* 35 * Error Recovery functions: 36 * - Read Opposite: implemented 37 * - Read Device (buffered) log: BRA 38 * - Read Library log: BRA 39 * - Swap Devices: BRA 40 * - Long Busy: implemented 41 * - Special Intercept: BRA 42 * - Read Alternate: implemented 43 *******************************************************************/ 44 45 static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = { 46 [0x00] = "", 47 [0x10] = "Lost Sense", 48 [0x11] = "Assigned Elsewhere", 49 [0x12] = "Allegiance Reset", 50 [0x13] = "Shared Access Violation", 51 [0x20] = "Command Reject", 52 [0x21] = "Configuration Error", 53 [0x22] = "Protection Exception", 54 [0x23] = "Write Protect", 55 [0x24] = "Write Length", 56 [0x25] = "Read-Only Format", 57 [0x31] = "Beginning of Partition", 58 [0x33] = "End of Partition", 59 [0x34] = "End of Data", 60 [0x35] = "Block not found", 61 [0x40] = "Device Intervention", 62 [0x41] = "Loader Intervention", 63 [0x42] = "Library Intervention", 64 [0x50] = "Write Error", 65 [0x51] = "Erase Error", 66 [0x52] = "Formatting Error", 67 [0x53] = "Read Error", 68 [0x54] = "Unsupported Format", 69 [0x55] = "No Formatting", 70 [0x56] = "Positioning lost", 71 [0x57] = "Read Length", 72 [0x60] = "Unsupported Medium", 73 [0x61] = "Medium Length Error", 74 [0x62] = "Medium removed", 75 [0x64] = "Load Check", 76 [0x65] = "Unload Check", 77 [0x70] = "Equipment Check", 78 [0x71] = "Bus out Check", 79 [0x72] = "Protocol Error", 80 [0x73] = "Interface Error", 81 [0x74] = "Overrun", 82 [0x75] = "Halt Signal", 83 [0x90] = "Device fenced", 84 [0x91] = "Device Path fenced", 85 [0xa0] = "Volume misplaced", 86 [0xa1] = "Volume inaccessible", 87 [0xa2] = "Volume in input", 88 [0xa3] = "Volume ejected", 89 [0xa4] = "All categories reserved", 90 [0xa5] = "Duplicate Volume", 91 [0xa6] = "Library Manager Offline", 92 [0xa7] = "Library Output Station full", 93 [0xa8] = "Vision System non-operational", 94 [0xa9] = "Library Manager Equipment Check", 95 [0xaa] = "Library Equipment Check", 96 [0xab] = "All Library Cells full", 97 [0xac] = "No Cleaner Volumes in Library", 98 [0xad] = "I/O Station door open", 99 [0xae] = "Subsystem environmental alert", 100 }; 101 102 static int crypt_supported(struct tape_device *device) 103 { 104 return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device)); 105 } 106 107 static int crypt_enabled(struct tape_device *device) 108 { 109 return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device)); 110 } 111 112 static void ext_to_int_kekl(struct tape390_kekl *in, 113 struct tape3592_kekl *out) 114 { 115 int i; 116 117 memset(out, 0, sizeof(*out)); 118 if (in->type == TAPE390_KEKL_TYPE_HASH) 119 out->flags |= 0x40; 120 if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH) 121 out->flags |= 0x80; 122 strncpy(out->label, in->label, 64); 123 for (i = strlen(in->label); i < sizeof(out->label); i++) 124 out->label[i] = ' '; 125 ASCEBC(out->label, sizeof(out->label)); 126 } 127 128 static void int_to_ext_kekl(struct tape3592_kekl *in, 129 struct tape390_kekl *out) 130 { 131 memset(out, 0, sizeof(*out)); 132 if(in->flags & 0x40) 133 out->type = TAPE390_KEKL_TYPE_HASH; 134 else 135 out->type = TAPE390_KEKL_TYPE_LABEL; 136 if(in->flags & 0x80) 137 out->type_on_tape = TAPE390_KEKL_TYPE_HASH; 138 else 139 out->type_on_tape = TAPE390_KEKL_TYPE_LABEL; 140 memcpy(out->label, in->label, sizeof(in->label)); 141 EBCASC(out->label, sizeof(in->label)); 142 strim(out->label); 143 } 144 145 static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in, 146 struct tape390_kekl_pair *out) 147 { 148 if (in->count == 0) { 149 out->kekl[0].type = TAPE390_KEKL_TYPE_NONE; 150 out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE; 151 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; 152 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; 153 } else if (in->count == 1) { 154 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); 155 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; 156 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; 157 } else if (in->count == 2) { 158 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); 159 int_to_ext_kekl(&in->kekl[1], &out->kekl[1]); 160 } else { 161 printk("Invalid KEKL number: %d\n", in->count); 162 BUG(); 163 } 164 } 165 166 static int check_ext_kekl(struct tape390_kekl *kekl) 167 { 168 if (kekl->type == TAPE390_KEKL_TYPE_NONE) 169 goto invalid; 170 if (kekl->type > TAPE390_KEKL_TYPE_HASH) 171 goto invalid; 172 if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE) 173 goto invalid; 174 if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH) 175 goto invalid; 176 if ((kekl->type == TAPE390_KEKL_TYPE_HASH) && 177 (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL)) 178 goto invalid; 179 180 return 0; 181 invalid: 182 return -EINVAL; 183 } 184 185 static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls) 186 { 187 if (check_ext_kekl(&kekls->kekl[0])) 188 goto invalid; 189 if (check_ext_kekl(&kekls->kekl[1])) 190 goto invalid; 191 192 return 0; 193 invalid: 194 return -EINVAL; 195 } 196 197 /* 198 * Query KEKLs 199 */ 200 static int tape_3592_kekl_query(struct tape_device *device, 201 struct tape390_kekl_pair *ext_kekls) 202 { 203 struct tape_request *request; 204 struct tape3592_kekl_query_order *order; 205 struct tape3592_kekl_query_data *int_kekls; 206 int rc; 207 208 DBF_EVENT(6, "tape3592_kekl_query\n"); 209 int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA); 210 if (!int_kekls) 211 return -ENOMEM; 212 request = tape_alloc_request(2, sizeof(*order)); 213 if (IS_ERR(request)) { 214 rc = PTR_ERR(request); 215 goto fail_malloc; 216 } 217 order = request->cpdata; 218 memset(order,0,sizeof(*order)); 219 order->code = 0xe2; 220 order->max_count = 2; 221 request->op = TO_KEKL_QUERY; 222 tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); 223 tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls), 224 int_kekls); 225 rc = tape_do_io(device, request); 226 if (rc) 227 goto fail_request; 228 int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls); 229 230 rc = 0; 231 fail_request: 232 tape_free_request(request); 233 fail_malloc: 234 kfree(int_kekls); 235 return rc; 236 } 237 238 /* 239 * IOCTL: Query KEKLs 240 */ 241 static int tape_3592_ioctl_kekl_query(struct tape_device *device, 242 unsigned long arg) 243 { 244 int rc; 245 struct tape390_kekl_pair *ext_kekls; 246 247 DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n"); 248 if (!crypt_supported(device)) 249 return -ENOSYS; 250 if (!crypt_enabled(device)) 251 return -EUNATCH; 252 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); 253 if (!ext_kekls) 254 return -ENOMEM; 255 rc = tape_3592_kekl_query(device, ext_kekls); 256 if (rc != 0) 257 goto fail; 258 if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) { 259 rc = -EFAULT; 260 goto fail; 261 } 262 rc = 0; 263 fail: 264 kfree(ext_kekls); 265 return rc; 266 } 267 268 static int tape_3590_mttell(struct tape_device *device, int mt_count); 269 270 /* 271 * Set KEKLs 272 */ 273 static int tape_3592_kekl_set(struct tape_device *device, 274 struct tape390_kekl_pair *ext_kekls) 275 { 276 struct tape_request *request; 277 struct tape3592_kekl_set_order *order; 278 279 DBF_EVENT(6, "tape3592_kekl_set\n"); 280 if (check_ext_kekl_pair(ext_kekls)) { 281 DBF_EVENT(6, "invalid kekls\n"); 282 return -EINVAL; 283 } 284 if (tape_3590_mttell(device, 0) != 0) 285 return -EBADSLT; 286 request = tape_alloc_request(1, sizeof(*order)); 287 if (IS_ERR(request)) 288 return PTR_ERR(request); 289 order = request->cpdata; 290 memset(order, 0, sizeof(*order)); 291 order->code = 0xe3; 292 order->kekls.count = 2; 293 ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]); 294 ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]); 295 request->op = TO_KEKL_SET; 296 tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); 297 298 return tape_do_io_free(device, request); 299 } 300 301 /* 302 * IOCTL: Set KEKLs 303 */ 304 static int tape_3592_ioctl_kekl_set(struct tape_device *device, 305 unsigned long arg) 306 { 307 int rc; 308 struct tape390_kekl_pair *ext_kekls; 309 310 DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n"); 311 if (!crypt_supported(device)) 312 return -ENOSYS; 313 if (!crypt_enabled(device)) 314 return -EUNATCH; 315 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); 316 if (!ext_kekls) 317 return -ENOMEM; 318 if (copy_from_user(ext_kekls, (char __user *)arg, sizeof(*ext_kekls))) { 319 rc = -EFAULT; 320 goto out; 321 } 322 rc = tape_3592_kekl_set(device, ext_kekls); 323 out: 324 kfree(ext_kekls); 325 return rc; 326 } 327 328 /* 329 * Enable encryption 330 */ 331 static struct tape_request *__tape_3592_enable_crypt(struct tape_device *device) 332 { 333 struct tape_request *request; 334 char *data; 335 336 DBF_EVENT(6, "tape_3592_enable_crypt\n"); 337 if (!crypt_supported(device)) 338 return ERR_PTR(-ENOSYS); 339 request = tape_alloc_request(2, 72); 340 if (IS_ERR(request)) 341 return request; 342 data = request->cpdata; 343 memset(data,0,72); 344 345 data[0] = 0x05; 346 data[36 + 0] = 0x03; 347 data[36 + 1] = 0x03; 348 data[36 + 4] = 0x40; 349 data[36 + 6] = 0x01; 350 data[36 + 14] = 0x2f; 351 data[36 + 18] = 0xc3; 352 data[36 + 35] = 0x72; 353 request->op = TO_CRYPT_ON; 354 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 355 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 356 return request; 357 } 358 359 static int tape_3592_enable_crypt(struct tape_device *device) 360 { 361 struct tape_request *request; 362 363 request = __tape_3592_enable_crypt(device); 364 if (IS_ERR(request)) 365 return PTR_ERR(request); 366 return tape_do_io_free(device, request); 367 } 368 369 static void tape_3592_enable_crypt_async(struct tape_device *device) 370 { 371 struct tape_request *request; 372 373 request = __tape_3592_enable_crypt(device); 374 if (!IS_ERR(request)) 375 tape_do_io_async_free(device, request); 376 } 377 378 /* 379 * Disable encryption 380 */ 381 static struct tape_request *__tape_3592_disable_crypt(struct tape_device *device) 382 { 383 struct tape_request *request; 384 char *data; 385 386 DBF_EVENT(6, "tape_3592_disable_crypt\n"); 387 if (!crypt_supported(device)) 388 return ERR_PTR(-ENOSYS); 389 request = tape_alloc_request(2, 72); 390 if (IS_ERR(request)) 391 return request; 392 data = request->cpdata; 393 memset(data,0,72); 394 395 data[0] = 0x05; 396 data[36 + 0] = 0x03; 397 data[36 + 1] = 0x03; 398 data[36 + 35] = 0x32; 399 400 request->op = TO_CRYPT_OFF; 401 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 402 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 403 404 return request; 405 } 406 407 static int tape_3592_disable_crypt(struct tape_device *device) 408 { 409 struct tape_request *request; 410 411 request = __tape_3592_disable_crypt(device); 412 if (IS_ERR(request)) 413 return PTR_ERR(request); 414 return tape_do_io_free(device, request); 415 } 416 417 static void tape_3592_disable_crypt_async(struct tape_device *device) 418 { 419 struct tape_request *request; 420 421 request = __tape_3592_disable_crypt(device); 422 if (!IS_ERR(request)) 423 tape_do_io_async_free(device, request); 424 } 425 426 /* 427 * IOCTL: Set encryption status 428 */ 429 static int tape_3592_ioctl_crypt_set(struct tape_device *device, 430 unsigned long arg) 431 { 432 struct tape390_crypt_info info; 433 434 DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n"); 435 if (!crypt_supported(device)) 436 return -ENOSYS; 437 if (copy_from_user(&info, (char __user *)arg, sizeof(info))) 438 return -EFAULT; 439 if (info.status & ~TAPE390_CRYPT_ON_MASK) 440 return -EINVAL; 441 if (info.status & TAPE390_CRYPT_ON_MASK) 442 return tape_3592_enable_crypt(device); 443 else 444 return tape_3592_disable_crypt(device); 445 } 446 447 static int tape_3590_sense_medium(struct tape_device *device); 448 449 /* 450 * IOCTL: Query enryption status 451 */ 452 static int tape_3592_ioctl_crypt_query(struct tape_device *device, 453 unsigned long arg) 454 { 455 DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n"); 456 if (!crypt_supported(device)) 457 return -ENOSYS; 458 tape_3590_sense_medium(device); 459 if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device), 460 sizeof(TAPE_3590_CRYPT_INFO(device)))) 461 return -EFAULT; 462 else 463 return 0; 464 } 465 466 /* 467 * 3590 IOCTL Overload 468 */ 469 static int 470 tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) 471 { 472 switch (cmd) { 473 case TAPE390_DISPLAY: { 474 struct display_struct disp; 475 476 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp))) 477 return -EFAULT; 478 479 return tape_std_display(device, &disp); 480 } 481 case TAPE390_KEKL_SET: 482 return tape_3592_ioctl_kekl_set(device, arg); 483 case TAPE390_KEKL_QUERY: 484 return tape_3592_ioctl_kekl_query(device, arg); 485 case TAPE390_CRYPT_SET: 486 return tape_3592_ioctl_crypt_set(device, arg); 487 case TAPE390_CRYPT_QUERY: 488 return tape_3592_ioctl_crypt_query(device, arg); 489 default: 490 return -EINVAL; /* no additional ioctls */ 491 } 492 } 493 494 /* 495 * SENSE Medium: Get Sense data about medium state 496 */ 497 static int tape_3590_sense_medium(struct tape_device *device) 498 { 499 struct tape_request *request; 500 501 request = tape_alloc_request(1, 128); 502 if (IS_ERR(request)) 503 return PTR_ERR(request); 504 request->op = TO_MSEN; 505 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); 506 return tape_do_io_free(device, request); 507 } 508 509 static void tape_3590_sense_medium_async(struct tape_device *device) 510 { 511 struct tape_request *request; 512 513 request = tape_alloc_request(1, 128); 514 if (IS_ERR(request)) 515 return; 516 request->op = TO_MSEN; 517 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); 518 tape_do_io_async_free(device, request); 519 } 520 521 /* 522 * MTTELL: Tell block. Return the number of block relative to current file. 523 */ 524 static int 525 tape_3590_mttell(struct tape_device *device, int mt_count) 526 { 527 __u64 block_id; 528 int rc; 529 530 rc = tape_std_read_block_id(device, &block_id); 531 if (rc) 532 return rc; 533 return block_id >> 32; 534 } 535 536 /* 537 * MTSEEK: seek to the specified block. 538 */ 539 static int 540 tape_3590_mtseek(struct tape_device *device, int count) 541 { 542 struct tape_request *request; 543 544 DBF_EVENT(6, "xsee id: %x\n", count); 545 request = tape_alloc_request(3, 4); 546 if (IS_ERR(request)) 547 return PTR_ERR(request); 548 request->op = TO_LBL; 549 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 550 *(__u32 *) request->cpdata = count; 551 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 552 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 553 return tape_do_io_free(device, request); 554 } 555 556 /* 557 * Read Opposite Error Recovery Function: 558 * Used, when Read Forward does not work 559 */ 560 static void 561 tape_3590_read_opposite(struct tape_device *device, 562 struct tape_request *request) 563 { 564 struct tape_3590_disc_data *data; 565 566 /* 567 * We have allocated 4 ccws in tape_std_read, so we can now 568 * transform the request to a read backward, followed by a 569 * forward space block. 570 */ 571 request->op = TO_RBA; 572 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 573 data = device->discdata; 574 tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op, 575 device->char_data.idal_buf); 576 tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); 577 tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); 578 DBF_EVENT(6, "xrop ccwg\n"); 579 } 580 581 /* 582 * Read Attention Msg 583 * This should be done after an interrupt with attention bit (0x80) 584 * in device state. 585 * 586 * After a "read attention message" request there are two possible 587 * results: 588 * 589 * 1. A unit check is presented, when attention sense is present (e.g. when 590 * a medium has been unloaded). The attention sense comes then 591 * together with the unit check. The recovery action is either "retry" 592 * (in case there is an attention message pending) or "permanent error". 593 * 594 * 2. The attention msg is written to the "read subsystem data" buffer. 595 * In this case we probably should print it to the console. 596 */ 597 static void tape_3590_read_attmsg_async(struct tape_device *device) 598 { 599 struct tape_request *request; 600 char *buf; 601 602 request = tape_alloc_request(3, 4096); 603 if (IS_ERR(request)) 604 return; 605 request->op = TO_READ_ATTMSG; 606 buf = request->cpdata; 607 buf[0] = PREP_RD_SS_DATA; 608 buf[6] = RD_ATTMSG; /* read att msg */ 609 tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf); 610 tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12); 611 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 612 tape_do_io_async_free(device, request); 613 } 614 615 /* 616 * These functions are used to schedule follow-up actions from within an 617 * interrupt context (like unsolicited interrupts). 618 * Note: the work handler is called by the system work queue. The tape 619 * commands started by the handler need to be asynchrounous, otherwise 620 * a deadlock can occur e.g. in case of a deferred cc=1 (see __tape_do_irq). 621 */ 622 struct work_handler_data { 623 struct tape_device *device; 624 enum tape_op op; 625 struct work_struct work; 626 }; 627 628 static void 629 tape_3590_work_handler(struct work_struct *work) 630 { 631 struct work_handler_data *p = 632 container_of(work, struct work_handler_data, work); 633 634 switch (p->op) { 635 case TO_MSEN: 636 tape_3590_sense_medium_async(p->device); 637 break; 638 case TO_READ_ATTMSG: 639 tape_3590_read_attmsg_async(p->device); 640 break; 641 case TO_CRYPT_ON: 642 tape_3592_enable_crypt_async(p->device); 643 break; 644 case TO_CRYPT_OFF: 645 tape_3592_disable_crypt_async(p->device); 646 break; 647 default: 648 DBF_EVENT(3, "T3590: work handler undefined for " 649 "operation 0x%02x\n", p->op); 650 } 651 tape_put_device(p->device); 652 kfree(p); 653 } 654 655 static int 656 tape_3590_schedule_work(struct tape_device *device, enum tape_op op) 657 { 658 struct work_handler_data *p; 659 660 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) 661 return -ENOMEM; 662 663 INIT_WORK(&p->work, tape_3590_work_handler); 664 665 p->device = tape_get_device(device); 666 p->op = op; 667 668 queue_work(tape_3590_wq, &p->work); 669 return 0; 670 } 671 672 static void tape_3590_med_state_set(struct tape_device *device, 673 struct tape_3590_med_sense *sense) 674 { 675 struct tape390_crypt_info *c_info; 676 677 c_info = &TAPE_3590_CRYPT_INFO(device); 678 679 DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst); 680 switch (sense->macst) { 681 case 0x04: 682 case 0x05: 683 case 0x06: 684 tape_med_state_set(device, MS_UNLOADED); 685 TAPE_3590_CRYPT_INFO(device).medium_status = 0; 686 return; 687 case 0x08: 688 case 0x09: 689 tape_med_state_set(device, MS_LOADED); 690 break; 691 default: 692 tape_med_state_set(device, MS_UNKNOWN); 693 return; 694 } 695 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; 696 if (sense->flags & MSENSE_CRYPT_MASK) { 697 DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags); 698 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK; 699 } else { 700 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags); 701 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK; 702 } 703 } 704 705 /* 706 * The done handler is called at device/channel end and wakes up the sleeping 707 * process 708 */ 709 static int 710 tape_3590_done(struct tape_device *device, struct tape_request *request) 711 { 712 713 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); 714 715 switch (request->op) { 716 case TO_BSB: 717 case TO_BSF: 718 case TO_DSE: 719 case TO_FSB: 720 case TO_FSF: 721 case TO_LBL: 722 case TO_RFO: 723 case TO_RBA: 724 case TO_REW: 725 case TO_WRI: 726 case TO_WTM: 727 case TO_BLOCK: 728 case TO_LOAD: 729 tape_med_state_set(device, MS_LOADED); 730 break; 731 case TO_RUN: 732 tape_med_state_set(device, MS_UNLOADED); 733 tape_3590_schedule_work(device, TO_CRYPT_OFF); 734 break; 735 case TO_MSEN: 736 tape_3590_med_state_set(device, request->cpdata); 737 break; 738 case TO_CRYPT_ON: 739 TAPE_3590_CRYPT_INFO(device).status 740 |= TAPE390_CRYPT_ON_MASK; 741 *(device->modeset_byte) |= 0x03; 742 break; 743 case TO_CRYPT_OFF: 744 TAPE_3590_CRYPT_INFO(device).status 745 &= ~TAPE390_CRYPT_ON_MASK; 746 *(device->modeset_byte) &= ~0x03; 747 break; 748 case TO_RBI: /* RBI seems to succeed even without medium loaded. */ 749 case TO_NOP: /* Same to NOP. */ 750 case TO_READ_CONFIG: 751 case TO_READ_ATTMSG: 752 case TO_DIS: 753 case TO_ASSIGN: 754 case TO_UNASSIGN: 755 case TO_SIZE: 756 case TO_KEKL_SET: 757 case TO_KEKL_QUERY: 758 case TO_RDC: 759 break; 760 } 761 return TAPE_IO_SUCCESS; 762 } 763 764 /* 765 * This function is called, when error recovery was successful 766 */ 767 static inline int 768 tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) 769 { 770 DBF_EVENT(3, "Error Recovery successful for %s\n", 771 tape_op_verbose[request->op]); 772 return tape_3590_done(device, request); 773 } 774 775 /* 776 * This function is called, when error recovery was not successful 777 */ 778 static inline int 779 tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, 780 struct irb *irb, int rc) 781 { 782 DBF_EVENT(3, "Error Recovery failed for %s\n", 783 tape_op_verbose[request->op]); 784 tape_dump_sense_dbf(device, request, irb); 785 return rc; 786 } 787 788 /* 789 * Error Recovery do retry 790 */ 791 static inline int 792 tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, 793 struct irb *irb) 794 { 795 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); 796 tape_dump_sense_dbf(device, request, irb); 797 return TAPE_IO_RETRY; 798 } 799 800 /* 801 * Handle unsolicited interrupts 802 */ 803 static int 804 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) 805 { 806 if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END) 807 /* Probably result of halt ssch */ 808 return TAPE_IO_PENDING; 809 else if (irb->scsw.cmd.dstat == 0x85) 810 /* Device Ready */ 811 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); 812 else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 813 tape_3590_schedule_work(device, TO_READ_ATTMSG); 814 } else { 815 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); 816 tape_dump_sense_dbf(device, NULL, irb); 817 } 818 /* check medium state */ 819 tape_3590_schedule_work(device, TO_MSEN); 820 return TAPE_IO_SUCCESS; 821 } 822 823 /* 824 * Basic Recovery routine 825 */ 826 static int 827 tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, 828 struct irb *irb, int rc) 829 { 830 struct tape_3590_sense *sense; 831 832 sense = (struct tape_3590_sense *) irb->ecw; 833 834 switch (sense->bra) { 835 case SENSE_BRA_PER: 836 return tape_3590_erp_failed(device, request, irb, rc); 837 case SENSE_BRA_CONT: 838 return tape_3590_erp_succeded(device, request); 839 case SENSE_BRA_RE: 840 return tape_3590_erp_retry(device, request, irb); 841 case SENSE_BRA_DRE: 842 return tape_3590_erp_failed(device, request, irb, rc); 843 default: 844 BUG(); 845 return TAPE_IO_STOP; 846 } 847 } 848 849 /* 850 * RDL: Read Device (buffered) log 851 */ 852 static int 853 tape_3590_erp_read_buf_log(struct tape_device *device, 854 struct tape_request *request, struct irb *irb) 855 { 856 /* 857 * We just do the basic error recovery at the moment (retry). 858 * Perhaps in the future, we read the log and dump it somewhere... 859 */ 860 return tape_3590_erp_basic(device, request, irb, -EIO); 861 } 862 863 /* 864 * SWAP: Swap Devices 865 */ 866 static int 867 tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, 868 struct irb *irb) 869 { 870 /* 871 * This error recovery should swap the tapes 872 * if the original has a problem. The operation 873 * should proceed with the new tape... this 874 * should probably be done in user space! 875 */ 876 dev_warn (&device->cdev->dev, "The tape medium must be loaded into a " 877 "different tape unit\n"); 878 return tape_3590_erp_basic(device, request, irb, -EIO); 879 } 880 881 /* 882 * LBY: Long Busy 883 */ 884 static int 885 tape_3590_erp_long_busy(struct tape_device *device, 886 struct tape_request *request, struct irb *irb) 887 { 888 DBF_EVENT(6, "Device is busy\n"); 889 return TAPE_IO_LONG_BUSY; 890 } 891 892 /* 893 * SPI: Special Intercept 894 */ 895 static int 896 tape_3590_erp_special_interrupt(struct tape_device *device, 897 struct tape_request *request, struct irb *irb) 898 { 899 return tape_3590_erp_basic(device, request, irb, -EIO); 900 } 901 902 /* 903 * RDA: Read Alternate 904 */ 905 static int 906 tape_3590_erp_read_alternate(struct tape_device *device, 907 struct tape_request *request, struct irb *irb) 908 { 909 struct tape_3590_disc_data *data; 910 911 /* 912 * The issued Read Backward or Read Previous command is not 913 * supported by the device 914 * The recovery action should be to issue another command: 915 * Read Revious: if Read Backward is not supported 916 * Read Backward: if Read Previous is not supported 917 */ 918 data = device->discdata; 919 if (data->read_back_op == READ_PREVIOUS) { 920 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", 921 device->cdev_id); 922 data->read_back_op = READ_BACKWARD; 923 } else { 924 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", 925 device->cdev_id); 926 data->read_back_op = READ_PREVIOUS; 927 } 928 tape_3590_read_opposite(device, request); 929 return tape_3590_erp_retry(device, request, irb); 930 } 931 932 /* 933 * Error Recovery read opposite 934 */ 935 static int 936 tape_3590_erp_read_opposite(struct tape_device *device, 937 struct tape_request *request, struct irb *irb) 938 { 939 switch (request->op) { 940 case TO_RFO: 941 /* 942 * We did read forward, but the data could not be read. 943 * We will read backward and then skip forward again. 944 */ 945 tape_3590_read_opposite(device, request); 946 return tape_3590_erp_retry(device, request, irb); 947 case TO_RBA: 948 /* We tried to read forward and backward, but hat no success */ 949 return tape_3590_erp_failed(device, request, irb, -EIO); 950 break; 951 default: 952 return tape_3590_erp_failed(device, request, irb, -EIO); 953 } 954 } 955 956 /* 957 * Print an MIM (Media Information Message) (message code f0) 958 */ 959 static void 960 tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) 961 { 962 struct tape_3590_sense *sense; 963 char *exception, *service; 964 965 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 966 service = kmalloc(BUFSIZE, GFP_ATOMIC); 967 968 if (!exception || !service) 969 goto out_nomem; 970 971 sense = (struct tape_3590_sense *) irb->ecw; 972 /* Exception Message */ 973 switch (sense->fmt.f70.emc) { 974 case 0x02: 975 snprintf(exception, BUFSIZE, "Data degraded"); 976 break; 977 case 0x03: 978 snprintf(exception, BUFSIZE, "Data degraded in partion %i", 979 sense->fmt.f70.mp); 980 break; 981 case 0x04: 982 snprintf(exception, BUFSIZE, "Medium degraded"); 983 break; 984 case 0x05: 985 snprintf(exception, BUFSIZE, "Medium degraded in partition %i", 986 sense->fmt.f70.mp); 987 break; 988 case 0x06: 989 snprintf(exception, BUFSIZE, "Block 0 Error"); 990 break; 991 case 0x07: 992 snprintf(exception, BUFSIZE, "Medium Exception 0x%02x", 993 sense->fmt.f70.md); 994 break; 995 default: 996 snprintf(exception, BUFSIZE, "0x%02x", 997 sense->fmt.f70.emc); 998 break; 999 } 1000 /* Service Message */ 1001 switch (sense->fmt.f70.smc) { 1002 case 0x02: 1003 snprintf(service, BUFSIZE, "Reference Media maintenance " 1004 "procedure %i", sense->fmt.f70.md); 1005 break; 1006 default: 1007 snprintf(service, BUFSIZE, "0x%02x", 1008 sense->fmt.f70.smc); 1009 break; 1010 } 1011 1012 dev_warn (&device->cdev->dev, "Tape media information: exception %s, " 1013 "service %s\n", exception, service); 1014 1015 out_nomem: 1016 kfree(exception); 1017 kfree(service); 1018 } 1019 1020 /* 1021 * Print an I/O Subsystem Service Information Message (message code f1) 1022 */ 1023 static void 1024 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) 1025 { 1026 struct tape_3590_sense *sense; 1027 char *exception, *service; 1028 1029 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1030 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1031 1032 if (!exception || !service) 1033 goto out_nomem; 1034 1035 sense = (struct tape_3590_sense *) irb->ecw; 1036 /* Exception Message */ 1037 switch (sense->fmt.f71.emc) { 1038 case 0x01: 1039 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1040 break; 1041 case 0x02: 1042 snprintf(exception, BUFSIZE, "CU Exception - no performance " 1043 "impact"); 1044 break; 1045 case 0x03: 1046 snprintf(exception, BUFSIZE, "CU Exception on channel " 1047 "interface 0x%02x", sense->fmt.f71.md[0]); 1048 break; 1049 case 0x04: 1050 snprintf(exception, BUFSIZE, "CU Exception on device path " 1051 "0x%02x", sense->fmt.f71.md[0]); 1052 break; 1053 case 0x05: 1054 snprintf(exception, BUFSIZE, "CU Exception on library path " 1055 "0x%02x", sense->fmt.f71.md[0]); 1056 break; 1057 case 0x06: 1058 snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x", 1059 sense->fmt.f71.md[0]); 1060 break; 1061 case 0x07: 1062 snprintf(exception, BUFSIZE, "CU Exception on partition " 1063 "0x%02x", sense->fmt.f71.md[0]); 1064 break; 1065 default: 1066 snprintf(exception, BUFSIZE, "0x%02x", 1067 sense->fmt.f71.emc); 1068 } 1069 /* Service Message */ 1070 switch (sense->fmt.f71.smc) { 1071 case 0x01: 1072 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1073 break; 1074 case 0x02: 1075 snprintf(service, BUFSIZE, "Repair will not impact cu " 1076 "performance"); 1077 break; 1078 case 0x03: 1079 if (sense->fmt.f71.mdf == 0) 1080 snprintf(service, BUFSIZE, "Repair will disable node " 1081 "0x%x on CU", sense->fmt.f71.md[1]); 1082 else 1083 snprintf(service, BUFSIZE, "Repair will disable " 1084 "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1], 1085 sense->fmt.f71.md[2]); 1086 break; 1087 case 0x04: 1088 if (sense->fmt.f71.mdf == 0) 1089 snprintf(service, BUFSIZE, "Repair will disable " 1090 "channel path 0x%x on CU", 1091 sense->fmt.f71.md[1]); 1092 else 1093 snprintf(service, BUFSIZE, "Repair will disable cannel" 1094 " paths (0x%x-0x%x) on CU", 1095 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1096 break; 1097 case 0x05: 1098 if (sense->fmt.f71.mdf == 0) 1099 snprintf(service, BUFSIZE, "Repair will disable device" 1100 " path 0x%x on CU", sense->fmt.f71.md[1]); 1101 else 1102 snprintf(service, BUFSIZE, "Repair will disable device" 1103 " paths (0x%x-0x%x) on CU", 1104 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1105 break; 1106 case 0x06: 1107 if (sense->fmt.f71.mdf == 0) 1108 snprintf(service, BUFSIZE, "Repair will disable " 1109 "library path 0x%x on CU", 1110 sense->fmt.f71.md[1]); 1111 else 1112 snprintf(service, BUFSIZE, "Repair will disable " 1113 "library paths (0x%x-0x%x) on CU", 1114 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1115 break; 1116 case 0x07: 1117 snprintf(service, BUFSIZE, "Repair will disable access to CU"); 1118 break; 1119 default: 1120 snprintf(service, BUFSIZE, "0x%02x", 1121 sense->fmt.f71.smc); 1122 } 1123 1124 dev_warn (&device->cdev->dev, "I/O subsystem information: exception" 1125 " %s, service %s\n", exception, service); 1126 out_nomem: 1127 kfree(exception); 1128 kfree(service); 1129 } 1130 1131 /* 1132 * Print an Device Subsystem Service Information Message (message code f2) 1133 */ 1134 static void 1135 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) 1136 { 1137 struct tape_3590_sense *sense; 1138 char *exception, *service; 1139 1140 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1141 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1142 1143 if (!exception || !service) 1144 goto out_nomem; 1145 1146 sense = (struct tape_3590_sense *) irb->ecw; 1147 /* Exception Message */ 1148 switch (sense->fmt.f71.emc) { 1149 case 0x01: 1150 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1151 break; 1152 case 0x02: 1153 snprintf(exception, BUFSIZE, "DV Exception - no performance" 1154 " impact"); 1155 break; 1156 case 0x03: 1157 snprintf(exception, BUFSIZE, "DV Exception on channel " 1158 "interface 0x%02x", sense->fmt.f71.md[0]); 1159 break; 1160 case 0x04: 1161 snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x", 1162 sense->fmt.f71.md[0]); 1163 break; 1164 case 0x05: 1165 snprintf(exception, BUFSIZE, "DV Exception on message display" 1166 " 0x%02x", sense->fmt.f71.md[0]); 1167 break; 1168 case 0x06: 1169 snprintf(exception, BUFSIZE, "DV Exception in tape path"); 1170 break; 1171 case 0x07: 1172 snprintf(exception, BUFSIZE, "DV Exception in drive"); 1173 break; 1174 default: 1175 snprintf(exception, BUFSIZE, "0x%02x", 1176 sense->fmt.f71.emc); 1177 } 1178 /* Service Message */ 1179 switch (sense->fmt.f71.smc) { 1180 case 0x01: 1181 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1182 break; 1183 case 0x02: 1184 snprintf(service, BUFSIZE, "Repair will not impact device " 1185 "performance"); 1186 break; 1187 case 0x03: 1188 if (sense->fmt.f71.mdf == 0) 1189 snprintf(service, BUFSIZE, "Repair will disable " 1190 "channel path 0x%x on DV", 1191 sense->fmt.f71.md[1]); 1192 else 1193 snprintf(service, BUFSIZE, "Repair will disable " 1194 "channel path (0x%x-0x%x) on DV", 1195 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1196 break; 1197 case 0x04: 1198 if (sense->fmt.f71.mdf == 0) 1199 snprintf(service, BUFSIZE, "Repair will disable " 1200 "interface 0x%x on DV", sense->fmt.f71.md[1]); 1201 else 1202 snprintf(service, BUFSIZE, "Repair will disable " 1203 "interfaces (0x%x-0x%x) on DV", 1204 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1205 break; 1206 case 0x05: 1207 if (sense->fmt.f71.mdf == 0) 1208 snprintf(service, BUFSIZE, "Repair will disable loader" 1209 " 0x%x on DV", sense->fmt.f71.md[1]); 1210 else 1211 snprintf(service, BUFSIZE, "Repair will disable loader" 1212 " (0x%x-0x%x) on DV", 1213 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1214 break; 1215 case 0x07: 1216 snprintf(service, BUFSIZE, "Repair will disable access to DV"); 1217 break; 1218 case 0x08: 1219 if (sense->fmt.f71.mdf == 0) 1220 snprintf(service, BUFSIZE, "Repair will disable " 1221 "message display 0x%x on DV", 1222 sense->fmt.f71.md[1]); 1223 else 1224 snprintf(service, BUFSIZE, "Repair will disable " 1225 "message displays (0x%x-0x%x) on DV", 1226 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1227 break; 1228 case 0x09: 1229 snprintf(service, BUFSIZE, "Clean DV"); 1230 break; 1231 default: 1232 snprintf(service, BUFSIZE, "0x%02x", 1233 sense->fmt.f71.smc); 1234 } 1235 1236 dev_warn (&device->cdev->dev, "Device subsystem information: exception" 1237 " %s, service %s\n", exception, service); 1238 out_nomem: 1239 kfree(exception); 1240 kfree(service); 1241 } 1242 1243 /* 1244 * Print standard ERA Message 1245 */ 1246 static void 1247 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) 1248 { 1249 struct tape_3590_sense *sense; 1250 1251 sense = (struct tape_3590_sense *) irb->ecw; 1252 if (sense->mc == 0) 1253 return; 1254 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { 1255 if (tape_3590_msg[sense->mc] != NULL) 1256 dev_warn (&device->cdev->dev, "The tape unit has " 1257 "issued sense message %s\n", 1258 tape_3590_msg[sense->mc]); 1259 else 1260 dev_warn (&device->cdev->dev, "The tape unit has " 1261 "issued an unknown sense message code 0x%x\n", 1262 sense->mc); 1263 return; 1264 } 1265 if (sense->mc == 0xf0) { 1266 /* Standard Media Information Message */ 1267 dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, " 1268 "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc, 1269 sense->fmt.f70.emc, sense->fmt.f70.smc, 1270 sense->fmt.f70.refcode, sense->fmt.f70.mid, 1271 sense->fmt.f70.fid); 1272 tape_3590_print_mim_msg_f0(device, irb); 1273 return; 1274 } 1275 if (sense->mc == 0xf1) { 1276 /* Standard I/O Subsystem Service Information Message */ 1277 dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x," 1278 " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1279 sense->fmt.f71.sev, device->cdev->id.dev_model, 1280 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1281 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1282 sense->fmt.f71.refcode3); 1283 tape_3590_print_io_sim_msg_f1(device, irb); 1284 return; 1285 } 1286 if (sense->mc == 0xf2) { 1287 /* Standard Device Service Information Message */ 1288 dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x" 1289 ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1290 sense->fmt.f71.sev, device->cdev->id.dev_model, 1291 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1292 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1293 sense->fmt.f71.refcode3); 1294 tape_3590_print_dev_sim_msg_f2(device, irb); 1295 return; 1296 } 1297 if (sense->mc == 0xf3) { 1298 /* Standard Library Service Information Message */ 1299 return; 1300 } 1301 dev_warn (&device->cdev->dev, "The tape unit has issued an unknown " 1302 "sense message code %x\n", sense->mc); 1303 } 1304 1305 static int tape_3590_crypt_error(struct tape_device *device, 1306 struct tape_request *request, struct irb *irb) 1307 { 1308 u8 cu_rc; 1309 u16 ekm_rc2; 1310 char *sense; 1311 1312 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; 1313 cu_rc = sense[0]; 1314 ekm_rc2 = *((u16*) &sense[10]); 1315 if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) 1316 /* key not defined on EKM */ 1317 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); 1318 if ((cu_rc == 1) || (cu_rc == 2)) 1319 /* No connection to EKM */ 1320 return tape_3590_erp_basic(device, request, irb, -ENOTCONN); 1321 1322 dev_err (&device->cdev->dev, "The tape unit failed to obtain the " 1323 "encryption key from EKM\n"); 1324 1325 return tape_3590_erp_basic(device, request, irb, -ENOKEY); 1326 } 1327 1328 /* 1329 * 3590 error Recovery routine: 1330 * If possible, it tries to recover from the error. If this is not possible, 1331 * inform the user about the problem. 1332 */ 1333 static int 1334 tape_3590_unit_check(struct tape_device *device, struct tape_request *request, 1335 struct irb *irb) 1336 { 1337 struct tape_3590_sense *sense; 1338 1339 sense = (struct tape_3590_sense *) irb->ecw; 1340 1341 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); 1342 1343 /* 1344 * First check all RC-QRCs where we want to do something special 1345 * - "break": basic error recovery is done 1346 * - "goto out:": just print error message if available 1347 */ 1348 switch (sense->rc_rqc) { 1349 1350 case 0x1110: 1351 tape_3590_print_era_msg(device, irb); 1352 return tape_3590_erp_read_buf_log(device, request, irb); 1353 1354 case 0x2011: 1355 tape_3590_print_era_msg(device, irb); 1356 return tape_3590_erp_read_alternate(device, request, irb); 1357 1358 case 0x2230: 1359 case 0x2231: 1360 tape_3590_print_era_msg(device, irb); 1361 return tape_3590_erp_special_interrupt(device, request, irb); 1362 case 0x2240: 1363 return tape_3590_crypt_error(device, request, irb); 1364 1365 case 0x3010: 1366 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", 1367 device->cdev_id); 1368 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1369 case 0x3012: 1370 DBF_EVENT(2, "(%08x): Forward at End of Partition\n", 1371 device->cdev_id); 1372 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1373 case 0x3020: 1374 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); 1375 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1376 1377 case 0x3122: 1378 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", 1379 device->cdev_id); 1380 return tape_3590_erp_basic(device, request, irb, -EIO); 1381 case 0x3123: 1382 DBF_EVENT(2, "(%08x): Rewind Unload complete\n", 1383 device->cdev_id); 1384 tape_med_state_set(device, MS_UNLOADED); 1385 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1386 return tape_3590_erp_basic(device, request, irb, 0); 1387 1388 case 0x4010: 1389 /* 1390 * print additional msg since default msg 1391 * "device intervention" is not very meaningfull 1392 */ 1393 tape_med_state_set(device, MS_UNLOADED); 1394 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1395 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1396 case 0x4012: /* Device Long Busy */ 1397 /* XXX: Also use long busy handling here? */ 1398 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); 1399 tape_3590_print_era_msg(device, irb); 1400 return tape_3590_erp_basic(device, request, irb, -EBUSY); 1401 case 0x4014: 1402 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); 1403 return tape_3590_erp_long_busy(device, request, irb); 1404 1405 case 0x5010: 1406 if (sense->rac == 0xd0) { 1407 /* Swap */ 1408 tape_3590_print_era_msg(device, irb); 1409 return tape_3590_erp_swap(device, request, irb); 1410 } 1411 if (sense->rac == 0x26) { 1412 /* Read Opposite */ 1413 tape_3590_print_era_msg(device, irb); 1414 return tape_3590_erp_read_opposite(device, request, 1415 irb); 1416 } 1417 return tape_3590_erp_basic(device, request, irb, -EIO); 1418 case 0x5020: 1419 case 0x5021: 1420 case 0x5022: 1421 case 0x5040: 1422 case 0x5041: 1423 case 0x5042: 1424 tape_3590_print_era_msg(device, irb); 1425 return tape_3590_erp_swap(device, request, irb); 1426 1427 case 0x5110: 1428 case 0x5111: 1429 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1430 1431 case 0x5120: 1432 case 0x1120: 1433 tape_med_state_set(device, MS_UNLOADED); 1434 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1435 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1436 1437 case 0x6020: 1438 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1439 1440 case 0x8011: 1441 return tape_3590_erp_basic(device, request, irb, -EPERM); 1442 case 0x8013: 1443 dev_warn (&device->cdev->dev, "A different host has privileged" 1444 " access to the tape unit\n"); 1445 return tape_3590_erp_basic(device, request, irb, -EPERM); 1446 default: 1447 return tape_3590_erp_basic(device, request, irb, -EIO); 1448 } 1449 } 1450 1451 /* 1452 * 3590 interrupt handler: 1453 */ 1454 static int 1455 tape_3590_irq(struct tape_device *device, struct tape_request *request, 1456 struct irb *irb) 1457 { 1458 if (request == NULL) 1459 return tape_3590_unsolicited_irq(device, irb); 1460 1461 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && 1462 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && 1463 (request->op == TO_WRI)) { 1464 /* Write at end of volume */ 1465 DBF_EVENT(2, "End of volume\n"); 1466 return tape_3590_erp_failed(device, request, irb, -ENOSPC); 1467 } 1468 1469 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) 1470 return tape_3590_unit_check(device, request, irb); 1471 1472 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { 1473 if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) { 1474 if (request->op == TO_FSB || request->op == TO_BSB) 1475 request->rescnt++; 1476 else 1477 DBF_EVENT(5, "Unit Exception!\n"); 1478 } 1479 1480 return tape_3590_done(device, request); 1481 } 1482 1483 if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) { 1484 DBF_EVENT(2, "cannel end\n"); 1485 return TAPE_IO_PENDING; 1486 } 1487 1488 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 1489 DBF_EVENT(2, "Unit Attention when busy..\n"); 1490 return TAPE_IO_PENDING; 1491 } 1492 1493 DBF_EVENT(6, "xunknownirq\n"); 1494 tape_dump_sense_dbf(device, request, irb); 1495 return TAPE_IO_STOP; 1496 } 1497 1498 1499 static int tape_3590_read_dev_chars(struct tape_device *device, 1500 struct tape_3590_rdc_data *rdc_data) 1501 { 1502 int rc; 1503 struct tape_request *request; 1504 1505 request = tape_alloc_request(1, sizeof(*rdc_data)); 1506 if (IS_ERR(request)) 1507 return PTR_ERR(request); 1508 request->op = TO_RDC; 1509 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), 1510 request->cpdata); 1511 rc = tape_do_io(device, request); 1512 if (rc == 0) 1513 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); 1514 tape_free_request(request); 1515 return rc; 1516 } 1517 1518 /* 1519 * Setup device function 1520 */ 1521 static int 1522 tape_3590_setup_device(struct tape_device *device) 1523 { 1524 int rc; 1525 struct tape_3590_disc_data *data; 1526 struct tape_3590_rdc_data *rdc_data; 1527 1528 DBF_EVENT(6, "3590 device setup\n"); 1529 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); 1530 if (data == NULL) 1531 return -ENOMEM; 1532 data->read_back_op = READ_PREVIOUS; 1533 device->discdata = data; 1534 1535 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); 1536 if (!rdc_data) { 1537 rc = -ENOMEM; 1538 goto fail_kmalloc; 1539 } 1540 rc = tape_3590_read_dev_chars(device, rdc_data); 1541 if (rc) { 1542 DBF_LH(3, "Read device characteristics failed!\n"); 1543 goto fail_rdc_data; 1544 } 1545 rc = tape_std_assign(device); 1546 if (rc) 1547 goto fail_rdc_data; 1548 if (rdc_data->data[31] == 0x13) { 1549 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; 1550 tape_3592_disable_crypt(device); 1551 } else { 1552 DBF_EVENT(6, "Device has NO crypto support\n"); 1553 } 1554 /* Try to find out if medium is loaded */ 1555 rc = tape_3590_sense_medium(device); 1556 if (rc) { 1557 DBF_LH(3, "3590 medium sense returned %d\n", rc); 1558 goto fail_rdc_data; 1559 } 1560 return 0; 1561 1562 fail_rdc_data: 1563 kfree(rdc_data); 1564 fail_kmalloc: 1565 kfree(data); 1566 return rc; 1567 } 1568 1569 /* 1570 * Cleanup device function 1571 */ 1572 static void 1573 tape_3590_cleanup_device(struct tape_device *device) 1574 { 1575 flush_workqueue(tape_3590_wq); 1576 tape_std_unassign(device); 1577 1578 kfree(device->discdata); 1579 device->discdata = NULL; 1580 } 1581 1582 /* 1583 * List of 3590 magnetic tape commands. 1584 */ 1585 static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { 1586 [MTRESET] = tape_std_mtreset, 1587 [MTFSF] = tape_std_mtfsf, 1588 [MTBSF] = tape_std_mtbsf, 1589 [MTFSR] = tape_std_mtfsr, 1590 [MTBSR] = tape_std_mtbsr, 1591 [MTWEOF] = tape_std_mtweof, 1592 [MTREW] = tape_std_mtrew, 1593 [MTOFFL] = tape_std_mtoffl, 1594 [MTNOP] = tape_std_mtnop, 1595 [MTRETEN] = tape_std_mtreten, 1596 [MTBSFM] = tape_std_mtbsfm, 1597 [MTFSFM] = tape_std_mtfsfm, 1598 [MTEOM] = tape_std_mteom, 1599 [MTERASE] = tape_std_mterase, 1600 [MTRAS1] = NULL, 1601 [MTRAS2] = NULL, 1602 [MTRAS3] = NULL, 1603 [MTSETBLK] = tape_std_mtsetblk, 1604 [MTSETDENSITY] = NULL, 1605 [MTSEEK] = tape_3590_mtseek, 1606 [MTTELL] = tape_3590_mttell, 1607 [MTSETDRVBUFFER] = NULL, 1608 [MTFSS] = NULL, 1609 [MTBSS] = NULL, 1610 [MTWSM] = NULL, 1611 [MTLOCK] = NULL, 1612 [MTUNLOCK] = NULL, 1613 [MTLOAD] = tape_std_mtload, 1614 [MTUNLOAD] = tape_std_mtunload, 1615 [MTCOMPRESSION] = tape_std_mtcompression, 1616 [MTSETPART] = NULL, 1617 [MTMKPART] = NULL 1618 }; 1619 1620 /* 1621 * Tape discipline structure for 3590. 1622 */ 1623 static struct tape_discipline tape_discipline_3590 = { 1624 .owner = THIS_MODULE, 1625 .setup_device = tape_3590_setup_device, 1626 .cleanup_device = tape_3590_cleanup_device, 1627 .process_eov = tape_std_process_eov, 1628 .irq = tape_3590_irq, 1629 .read_block = tape_std_read_block, 1630 .write_block = tape_std_write_block, 1631 .ioctl_fn = tape_3590_ioctl, 1632 .mtop_array = tape_3590_mtop 1633 }; 1634 1635 static struct ccw_device_id tape_3590_ids[] = { 1636 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, 1637 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, 1638 { /* end of list */ } 1639 }; 1640 1641 static int 1642 tape_3590_online(struct ccw_device *cdev) 1643 { 1644 return tape_generic_online(dev_get_drvdata(&cdev->dev), 1645 &tape_discipline_3590); 1646 } 1647 1648 static struct ccw_driver tape_3590_driver = { 1649 .driver = { 1650 .name = "tape_3590", 1651 .owner = THIS_MODULE, 1652 }, 1653 .ids = tape_3590_ids, 1654 .probe = tape_generic_probe, 1655 .remove = tape_generic_remove, 1656 .set_offline = tape_generic_offline, 1657 .set_online = tape_3590_online, 1658 .freeze = tape_generic_pm_suspend, 1659 .int_class = IOINT_TAP, 1660 }; 1661 1662 /* 1663 * Setup discipline structure. 1664 */ 1665 static int 1666 tape_3590_init(void) 1667 { 1668 int rc; 1669 1670 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); 1671 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); 1672 #ifdef DBF_LIKE_HELL 1673 debug_set_level(TAPE_DBF_AREA, 6); 1674 #endif 1675 1676 DBF_EVENT(3, "3590 init\n"); 1677 1678 tape_3590_wq = alloc_workqueue("tape_3590", 0, 0); 1679 if (!tape_3590_wq) 1680 return -ENOMEM; 1681 1682 /* Register driver for 3590 tapes. */ 1683 rc = ccw_driver_register(&tape_3590_driver); 1684 if (rc) { 1685 destroy_workqueue(tape_3590_wq); 1686 DBF_EVENT(3, "3590 init failed\n"); 1687 } else 1688 DBF_EVENT(3, "3590 registered\n"); 1689 return rc; 1690 } 1691 1692 static void 1693 tape_3590_exit(void) 1694 { 1695 ccw_driver_unregister(&tape_3590_driver); 1696 destroy_workqueue(tape_3590_wq); 1697 debug_unregister(TAPE_DBF_AREA); 1698 } 1699 1700 MODULE_DEVICE_TABLE(ccw, tape_3590_ids); 1701 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); 1702 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); 1703 MODULE_LICENSE("GPL"); 1704 1705 module_init(tape_3590_init); 1706 module_exit(tape_3590_exit); 1707