1 /* 2 * drivers/s390/char/tape_3590.c 3 * tape device discipline for 3590 tapes. 4 * 5 * Copyright IBM Corp. 2001, 2009 6 * Author(s): Stefan Bader <shbader@de.ibm.com> 7 * Michael Holzheu <holzheu@de.ibm.com> 8 * Martin Schwidefsky <schwidefsky@de.ibm.com> 9 */ 10 11 #define KMSG_COMPONENT "tape_3590" 12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 13 14 #include <linux/module.h> 15 #include <linux/slab.h> 16 #include <linux/init.h> 17 #include <linux/bio.h> 18 #include <asm/ebcdic.h> 19 20 #define TAPE_DBF_AREA tape_3590_dbf 21 #define BUFSIZE 512 /* size of buffers for dynamic generated messages */ 22 23 #include "tape.h" 24 #include "tape_std.h" 25 #include "tape_3590.h" 26 27 static struct workqueue_struct *tape_3590_wq; 28 29 /* 30 * Pointer to debug area. 31 */ 32 debug_info_t *TAPE_DBF_AREA = NULL; 33 EXPORT_SYMBOL(TAPE_DBF_AREA); 34 35 /******************************************************************* 36 * Error Recovery functions: 37 * - Read Opposite: implemented 38 * - Read Device (buffered) log: BRA 39 * - Read Library log: BRA 40 * - Swap Devices: BRA 41 * - Long Busy: implemented 42 * - Special Intercept: BRA 43 * - Read Alternate: implemented 44 *******************************************************************/ 45 46 static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = { 47 [0x00] = "", 48 [0x10] = "Lost Sense", 49 [0x11] = "Assigned Elsewhere", 50 [0x12] = "Allegiance Reset", 51 [0x13] = "Shared Access Violation", 52 [0x20] = "Command Reject", 53 [0x21] = "Configuration Error", 54 [0x22] = "Protection Exception", 55 [0x23] = "Write Protect", 56 [0x24] = "Write Length", 57 [0x25] = "Read-Only Format", 58 [0x31] = "Beginning of Partition", 59 [0x33] = "End of Partition", 60 [0x34] = "End of Data", 61 [0x35] = "Block not found", 62 [0x40] = "Device Intervention", 63 [0x41] = "Loader Intervention", 64 [0x42] = "Library Intervention", 65 [0x50] = "Write Error", 66 [0x51] = "Erase Error", 67 [0x52] = "Formatting Error", 68 [0x53] = "Read Error", 69 [0x54] = "Unsupported Format", 70 [0x55] = "No Formatting", 71 [0x56] = "Positioning lost", 72 [0x57] = "Read Length", 73 [0x60] = "Unsupported Medium", 74 [0x61] = "Medium Length Error", 75 [0x62] = "Medium removed", 76 [0x64] = "Load Check", 77 [0x65] = "Unload Check", 78 [0x70] = "Equipment Check", 79 [0x71] = "Bus out Check", 80 [0x72] = "Protocol Error", 81 [0x73] = "Interface Error", 82 [0x74] = "Overrun", 83 [0x75] = "Halt Signal", 84 [0x90] = "Device fenced", 85 [0x91] = "Device Path fenced", 86 [0xa0] = "Volume misplaced", 87 [0xa1] = "Volume inaccessible", 88 [0xa2] = "Volume in input", 89 [0xa3] = "Volume ejected", 90 [0xa4] = "All categories reserved", 91 [0xa5] = "Duplicate Volume", 92 [0xa6] = "Library Manager Offline", 93 [0xa7] = "Library Output Station full", 94 [0xa8] = "Vision System non-operational", 95 [0xa9] = "Library Manager Equipment Check", 96 [0xaa] = "Library Equipment Check", 97 [0xab] = "All Library Cells full", 98 [0xac] = "No Cleaner Volumes in Library", 99 [0xad] = "I/O Station door open", 100 [0xae] = "Subsystem environmental alert", 101 }; 102 103 static int crypt_supported(struct tape_device *device) 104 { 105 return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device)); 106 } 107 108 static int crypt_enabled(struct tape_device *device) 109 { 110 return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device)); 111 } 112 113 static void ext_to_int_kekl(struct tape390_kekl *in, 114 struct tape3592_kekl *out) 115 { 116 int i; 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 strncpy(out->label, in->label, 64); 124 for (i = strlen(in->label); i < sizeof(out->label); i++) 125 out->label[i] = ' '; 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 = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); 317 if (!ext_kekls) 318 return -ENOMEM; 319 if (copy_from_user(ext_kekls, (char __user *)arg, sizeof(*ext_kekls))) { 320 rc = -EFAULT; 321 goto out; 322 } 323 rc = tape_3592_kekl_set(device, ext_kekls); 324 out: 325 kfree(ext_kekls); 326 return rc; 327 } 328 329 /* 330 * Enable encryption 331 */ 332 static struct tape_request *__tape_3592_enable_crypt(struct tape_device *device) 333 { 334 struct tape_request *request; 335 char *data; 336 337 DBF_EVENT(6, "tape_3592_enable_crypt\n"); 338 if (!crypt_supported(device)) 339 return ERR_PTR(-ENOSYS); 340 request = tape_alloc_request(2, 72); 341 if (IS_ERR(request)) 342 return request; 343 data = request->cpdata; 344 memset(data,0,72); 345 346 data[0] = 0x05; 347 data[36 + 0] = 0x03; 348 data[36 + 1] = 0x03; 349 data[36 + 4] = 0x40; 350 data[36 + 6] = 0x01; 351 data[36 + 14] = 0x2f; 352 data[36 + 18] = 0xc3; 353 data[36 + 35] = 0x72; 354 request->op = TO_CRYPT_ON; 355 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 356 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 357 return request; 358 } 359 360 static int tape_3592_enable_crypt(struct tape_device *device) 361 { 362 struct tape_request *request; 363 364 request = __tape_3592_enable_crypt(device); 365 if (IS_ERR(request)) 366 return PTR_ERR(request); 367 return tape_do_io_free(device, request); 368 } 369 370 static void tape_3592_enable_crypt_async(struct tape_device *device) 371 { 372 struct tape_request *request; 373 374 request = __tape_3592_enable_crypt(device); 375 if (!IS_ERR(request)) 376 tape_do_io_async_free(device, request); 377 } 378 379 /* 380 * Disable encryption 381 */ 382 static struct tape_request *__tape_3592_disable_crypt(struct tape_device *device) 383 { 384 struct tape_request *request; 385 char *data; 386 387 DBF_EVENT(6, "tape_3592_disable_crypt\n"); 388 if (!crypt_supported(device)) 389 return ERR_PTR(-ENOSYS); 390 request = tape_alloc_request(2, 72); 391 if (IS_ERR(request)) 392 return request; 393 data = request->cpdata; 394 memset(data,0,72); 395 396 data[0] = 0x05; 397 data[36 + 0] = 0x03; 398 data[36 + 1] = 0x03; 399 data[36 + 35] = 0x32; 400 401 request->op = TO_CRYPT_OFF; 402 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 403 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 404 405 return request; 406 } 407 408 static int tape_3592_disable_crypt(struct tape_device *device) 409 { 410 struct tape_request *request; 411 412 request = __tape_3592_disable_crypt(device); 413 if (IS_ERR(request)) 414 return PTR_ERR(request); 415 return tape_do_io_free(device, request); 416 } 417 418 static void tape_3592_disable_crypt_async(struct tape_device *device) 419 { 420 struct tape_request *request; 421 422 request = __tape_3592_disable_crypt(device); 423 if (!IS_ERR(request)) 424 tape_do_io_async_free(device, request); 425 } 426 427 /* 428 * IOCTL: Set encryption status 429 */ 430 static int tape_3592_ioctl_crypt_set(struct tape_device *device, 431 unsigned long arg) 432 { 433 struct tape390_crypt_info info; 434 435 DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n"); 436 if (!crypt_supported(device)) 437 return -ENOSYS; 438 if (copy_from_user(&info, (char __user *)arg, sizeof(info))) 439 return -EFAULT; 440 if (info.status & ~TAPE390_CRYPT_ON_MASK) 441 return -EINVAL; 442 if (info.status & TAPE390_CRYPT_ON_MASK) 443 return tape_3592_enable_crypt(device); 444 else 445 return tape_3592_disable_crypt(device); 446 } 447 448 static int tape_3590_sense_medium(struct tape_device *device); 449 450 /* 451 * IOCTL: Query enryption status 452 */ 453 static int tape_3592_ioctl_crypt_query(struct tape_device *device, 454 unsigned long arg) 455 { 456 DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n"); 457 if (!crypt_supported(device)) 458 return -ENOSYS; 459 tape_3590_sense_medium(device); 460 if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device), 461 sizeof(TAPE_3590_CRYPT_INFO(device)))) 462 return -EFAULT; 463 else 464 return 0; 465 } 466 467 /* 468 * 3590 IOCTL Overload 469 */ 470 static int 471 tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) 472 { 473 switch (cmd) { 474 case TAPE390_DISPLAY: { 475 struct display_struct disp; 476 477 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp))) 478 return -EFAULT; 479 480 return tape_std_display(device, &disp); 481 } 482 case TAPE390_KEKL_SET: 483 return tape_3592_ioctl_kekl_set(device, arg); 484 case TAPE390_KEKL_QUERY: 485 return tape_3592_ioctl_kekl_query(device, arg); 486 case TAPE390_CRYPT_SET: 487 return tape_3592_ioctl_crypt_set(device, arg); 488 case TAPE390_CRYPT_QUERY: 489 return tape_3592_ioctl_crypt_query(device, arg); 490 default: 491 return -EINVAL; /* no additional ioctls */ 492 } 493 } 494 495 /* 496 * SENSE Medium: Get Sense data about medium state 497 */ 498 static int tape_3590_sense_medium(struct tape_device *device) 499 { 500 struct tape_request *request; 501 502 request = tape_alloc_request(1, 128); 503 if (IS_ERR(request)) 504 return PTR_ERR(request); 505 request->op = TO_MSEN; 506 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); 507 return tape_do_io_free(device, request); 508 } 509 510 static void tape_3590_sense_medium_async(struct tape_device *device) 511 { 512 struct tape_request *request; 513 514 request = tape_alloc_request(1, 128); 515 if (IS_ERR(request)) 516 return; 517 request->op = TO_MSEN; 518 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); 519 tape_do_io_async_free(device, request); 520 } 521 522 /* 523 * MTTELL: Tell block. Return the number of block relative to current file. 524 */ 525 static int 526 tape_3590_mttell(struct tape_device *device, int mt_count) 527 { 528 __u64 block_id; 529 int rc; 530 531 rc = tape_std_read_block_id(device, &block_id); 532 if (rc) 533 return rc; 534 return block_id >> 32; 535 } 536 537 /* 538 * MTSEEK: seek to the specified block. 539 */ 540 static int 541 tape_3590_mtseek(struct tape_device *device, int count) 542 { 543 struct tape_request *request; 544 545 DBF_EVENT(6, "xsee id: %x\n", count); 546 request = tape_alloc_request(3, 4); 547 if (IS_ERR(request)) 548 return PTR_ERR(request); 549 request->op = TO_LBL; 550 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 551 *(__u32 *) request->cpdata = count; 552 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 553 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 554 return tape_do_io_free(device, request); 555 } 556 557 /* 558 * Read Opposite Error Recovery Function: 559 * Used, when Read Forward does not work 560 */ 561 static void 562 tape_3590_read_opposite(struct tape_device *device, 563 struct tape_request *request) 564 { 565 struct tape_3590_disc_data *data; 566 567 /* 568 * We have allocated 4 ccws in tape_std_read, so we can now 569 * transform the request to a read backward, followed by a 570 * forward space block. 571 */ 572 request->op = TO_RBA; 573 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 574 data = device->discdata; 575 tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op, 576 device->char_data.idal_buf); 577 tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); 578 tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); 579 DBF_EVENT(6, "xrop ccwg\n"); 580 } 581 582 /* 583 * Read Attention Msg 584 * This should be done after an interrupt with attention bit (0x80) 585 * in device state. 586 * 587 * After a "read attention message" request there are two possible 588 * results: 589 * 590 * 1. A unit check is presented, when attention sense is present (e.g. when 591 * a medium has been unloaded). The attention sense comes then 592 * together with the unit check. The recovery action is either "retry" 593 * (in case there is an attention message pending) or "permanent error". 594 * 595 * 2. The attention msg is written to the "read subsystem data" buffer. 596 * In this case we probably should print it to the console. 597 */ 598 static void tape_3590_read_attmsg_async(struct tape_device *device) 599 { 600 struct tape_request *request; 601 char *buf; 602 603 request = tape_alloc_request(3, 4096); 604 if (IS_ERR(request)) 605 return; 606 request->op = TO_READ_ATTMSG; 607 buf = request->cpdata; 608 buf[0] = PREP_RD_SS_DATA; 609 buf[6] = RD_ATTMSG; /* read att msg */ 610 tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf); 611 tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12); 612 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 613 tape_do_io_async_free(device, request); 614 } 615 616 /* 617 * These functions are used to schedule follow-up actions from within an 618 * interrupt context (like unsolicited interrupts). 619 * Note: the work handler is called by the system work queue. The tape 620 * commands started by the handler need to be asynchrounous, otherwise 621 * a deadlock can occur e.g. in case of a deferred cc=1 (see __tape_do_irq). 622 */ 623 struct work_handler_data { 624 struct tape_device *device; 625 enum tape_op op; 626 struct work_struct work; 627 }; 628 629 static void 630 tape_3590_work_handler(struct work_struct *work) 631 { 632 struct work_handler_data *p = 633 container_of(work, struct work_handler_data, work); 634 635 switch (p->op) { 636 case TO_MSEN: 637 tape_3590_sense_medium_async(p->device); 638 break; 639 case TO_READ_ATTMSG: 640 tape_3590_read_attmsg_async(p->device); 641 break; 642 case TO_CRYPT_ON: 643 tape_3592_enable_crypt_async(p->device); 644 break; 645 case TO_CRYPT_OFF: 646 tape_3592_disable_crypt_async(p->device); 647 break; 648 default: 649 DBF_EVENT(3, "T3590: work handler undefined for " 650 "operation 0x%02x\n", p->op); 651 } 652 tape_put_device(p->device); 653 kfree(p); 654 } 655 656 static int 657 tape_3590_schedule_work(struct tape_device *device, enum tape_op op) 658 { 659 struct work_handler_data *p; 660 661 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) 662 return -ENOMEM; 663 664 INIT_WORK(&p->work, tape_3590_work_handler); 665 666 p->device = tape_get_device(device); 667 p->op = op; 668 669 queue_work(tape_3590_wq, &p->work); 670 return 0; 671 } 672 673 #ifdef CONFIG_S390_TAPE_BLOCK 674 /* 675 * Tape Block READ 676 */ 677 static struct tape_request * 678 tape_3590_bread(struct tape_device *device, struct request *req) 679 { 680 struct tape_request *request; 681 struct ccw1 *ccw; 682 int count = 0, start_block; 683 unsigned off; 684 char *dst; 685 struct bio_vec *bv; 686 struct req_iterator iter; 687 688 DBF_EVENT(6, "xBREDid:"); 689 start_block = blk_rq_pos(req) >> TAPEBLOCK_HSEC_S2B; 690 DBF_EVENT(6, "start_block = %i\n", start_block); 691 692 rq_for_each_segment(bv, req, iter) 693 count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9); 694 695 request = tape_alloc_request(2 + count + 1, 4); 696 if (IS_ERR(request)) 697 return request; 698 request->op = TO_BLOCK; 699 *(__u32 *) request->cpdata = start_block; 700 ccw = request->cpaddr; 701 ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte); 702 703 /* 704 * We always setup a nop after the mode set ccw. This slot is 705 * used in tape_std_check_locate to insert a locate ccw if the 706 * current tape position doesn't match the start block to be read. 707 */ 708 ccw = tape_ccw_cc(ccw, NOP, 0, NULL); 709 710 rq_for_each_segment(bv, req, iter) { 711 dst = page_address(bv->bv_page) + bv->bv_offset; 712 for (off = 0; off < bv->bv_len; off += TAPEBLOCK_HSEC_SIZE) { 713 ccw->flags = CCW_FLAG_CC; 714 ccw->cmd_code = READ_FORWARD; 715 ccw->count = TAPEBLOCK_HSEC_SIZE; 716 set_normalized_cda(ccw, (void *) __pa(dst)); 717 ccw++; 718 dst += TAPEBLOCK_HSEC_SIZE; 719 } 720 BUG_ON(off > bv->bv_len); 721 } 722 ccw = tape_ccw_end(ccw, NOP, 0, NULL); 723 DBF_EVENT(6, "xBREDccwg\n"); 724 return request; 725 } 726 727 static void 728 tape_3590_free_bread(struct tape_request *request) 729 { 730 struct ccw1 *ccw; 731 732 /* Last ccw is a nop and doesn't need clear_normalized_cda */ 733 for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++) 734 if (ccw->cmd_code == READ_FORWARD) 735 clear_normalized_cda(ccw); 736 tape_free_request(request); 737 } 738 739 /* 740 * check_locate is called just before the tape request is passed to 741 * the common io layer for execution. It has to check the current 742 * tape position and insert a locate ccw if it doesn't match the 743 * start block for the request. 744 */ 745 static void 746 tape_3590_check_locate(struct tape_device *device, struct tape_request *request) 747 { 748 __u32 *start_block; 749 750 start_block = (__u32 *) request->cpdata; 751 if (*start_block != device->blk_data.block_position) { 752 /* Add the start offset of the file to get the real block. */ 753 *start_block += device->bof; 754 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 755 } 756 } 757 #endif 758 759 static void tape_3590_med_state_set(struct tape_device *device, 760 struct tape_3590_med_sense *sense) 761 { 762 struct tape390_crypt_info *c_info; 763 764 c_info = &TAPE_3590_CRYPT_INFO(device); 765 766 DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst); 767 switch (sense->macst) { 768 case 0x04: 769 case 0x05: 770 case 0x06: 771 tape_med_state_set(device, MS_UNLOADED); 772 TAPE_3590_CRYPT_INFO(device).medium_status = 0; 773 return; 774 case 0x08: 775 case 0x09: 776 tape_med_state_set(device, MS_LOADED); 777 break; 778 default: 779 tape_med_state_set(device, MS_UNKNOWN); 780 return; 781 } 782 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; 783 if (sense->flags & MSENSE_CRYPT_MASK) { 784 DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags); 785 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK; 786 } else { 787 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags); 788 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK; 789 } 790 } 791 792 /* 793 * The done handler is called at device/channel end and wakes up the sleeping 794 * process 795 */ 796 static int 797 tape_3590_done(struct tape_device *device, struct tape_request *request) 798 { 799 struct tape_3590_disc_data *disc_data; 800 801 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); 802 disc_data = device->discdata; 803 804 switch (request->op) { 805 case TO_BSB: 806 case TO_BSF: 807 case TO_DSE: 808 case TO_FSB: 809 case TO_FSF: 810 case TO_LBL: 811 case TO_RFO: 812 case TO_RBA: 813 case TO_REW: 814 case TO_WRI: 815 case TO_WTM: 816 case TO_BLOCK: 817 case TO_LOAD: 818 tape_med_state_set(device, MS_LOADED); 819 break; 820 case TO_RUN: 821 tape_med_state_set(device, MS_UNLOADED); 822 tape_3590_schedule_work(device, TO_CRYPT_OFF); 823 break; 824 case TO_MSEN: 825 tape_3590_med_state_set(device, request->cpdata); 826 break; 827 case TO_CRYPT_ON: 828 TAPE_3590_CRYPT_INFO(device).status 829 |= TAPE390_CRYPT_ON_MASK; 830 *(device->modeset_byte) |= 0x03; 831 break; 832 case TO_CRYPT_OFF: 833 TAPE_3590_CRYPT_INFO(device).status 834 &= ~TAPE390_CRYPT_ON_MASK; 835 *(device->modeset_byte) &= ~0x03; 836 break; 837 case TO_RBI: /* RBI seems to succeed even without medium loaded. */ 838 case TO_NOP: /* Same to NOP. */ 839 case TO_READ_CONFIG: 840 case TO_READ_ATTMSG: 841 case TO_DIS: 842 case TO_ASSIGN: 843 case TO_UNASSIGN: 844 case TO_SIZE: 845 case TO_KEKL_SET: 846 case TO_KEKL_QUERY: 847 case TO_RDC: 848 break; 849 } 850 return TAPE_IO_SUCCESS; 851 } 852 853 /* 854 * This function is called, when error recovery was successful 855 */ 856 static inline int 857 tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) 858 { 859 DBF_EVENT(3, "Error Recovery successful for %s\n", 860 tape_op_verbose[request->op]); 861 return tape_3590_done(device, request); 862 } 863 864 /* 865 * This function is called, when error recovery was not successful 866 */ 867 static inline int 868 tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, 869 struct irb *irb, int rc) 870 { 871 DBF_EVENT(3, "Error Recovery failed for %s\n", 872 tape_op_verbose[request->op]); 873 tape_dump_sense_dbf(device, request, irb); 874 return rc; 875 } 876 877 /* 878 * Error Recovery do retry 879 */ 880 static inline int 881 tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, 882 struct irb *irb) 883 { 884 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); 885 tape_dump_sense_dbf(device, request, irb); 886 return TAPE_IO_RETRY; 887 } 888 889 /* 890 * Handle unsolicited interrupts 891 */ 892 static int 893 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) 894 { 895 if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END) 896 /* Probably result of halt ssch */ 897 return TAPE_IO_PENDING; 898 else if (irb->scsw.cmd.dstat == 0x85) 899 /* Device Ready */ 900 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); 901 else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 902 tape_3590_schedule_work(device, TO_READ_ATTMSG); 903 } else { 904 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); 905 tape_dump_sense_dbf(device, NULL, irb); 906 } 907 /* check medium state */ 908 tape_3590_schedule_work(device, TO_MSEN); 909 return TAPE_IO_SUCCESS; 910 } 911 912 /* 913 * Basic Recovery routine 914 */ 915 static int 916 tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, 917 struct irb *irb, int rc) 918 { 919 struct tape_3590_sense *sense; 920 921 sense = (struct tape_3590_sense *) irb->ecw; 922 923 switch (sense->bra) { 924 case SENSE_BRA_PER: 925 return tape_3590_erp_failed(device, request, irb, rc); 926 case SENSE_BRA_CONT: 927 return tape_3590_erp_succeded(device, request); 928 case SENSE_BRA_RE: 929 return tape_3590_erp_retry(device, request, irb); 930 case SENSE_BRA_DRE: 931 return tape_3590_erp_failed(device, request, irb, rc); 932 default: 933 BUG(); 934 return TAPE_IO_STOP; 935 } 936 } 937 938 /* 939 * RDL: Read Device (buffered) log 940 */ 941 static int 942 tape_3590_erp_read_buf_log(struct tape_device *device, 943 struct tape_request *request, struct irb *irb) 944 { 945 /* 946 * We just do the basic error recovery at the moment (retry). 947 * Perhaps in the future, we read the log and dump it somewhere... 948 */ 949 return tape_3590_erp_basic(device, request, irb, -EIO); 950 } 951 952 /* 953 * SWAP: Swap Devices 954 */ 955 static int 956 tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, 957 struct irb *irb) 958 { 959 /* 960 * This error recovery should swap the tapes 961 * if the original has a problem. The operation 962 * should proceed with the new tape... this 963 * should probably be done in user space! 964 */ 965 dev_warn (&device->cdev->dev, "The tape medium must be loaded into a " 966 "different tape unit\n"); 967 return tape_3590_erp_basic(device, request, irb, -EIO); 968 } 969 970 /* 971 * LBY: Long Busy 972 */ 973 static int 974 tape_3590_erp_long_busy(struct tape_device *device, 975 struct tape_request *request, struct irb *irb) 976 { 977 DBF_EVENT(6, "Device is busy\n"); 978 return TAPE_IO_LONG_BUSY; 979 } 980 981 /* 982 * SPI: Special Intercept 983 */ 984 static int 985 tape_3590_erp_special_interrupt(struct tape_device *device, 986 struct tape_request *request, struct irb *irb) 987 { 988 return tape_3590_erp_basic(device, request, irb, -EIO); 989 } 990 991 /* 992 * RDA: Read Alternate 993 */ 994 static int 995 tape_3590_erp_read_alternate(struct tape_device *device, 996 struct tape_request *request, struct irb *irb) 997 { 998 struct tape_3590_disc_data *data; 999 1000 /* 1001 * The issued Read Backward or Read Previous command is not 1002 * supported by the device 1003 * The recovery action should be to issue another command: 1004 * Read Revious: if Read Backward is not supported 1005 * Read Backward: if Read Previous is not supported 1006 */ 1007 data = device->discdata; 1008 if (data->read_back_op == READ_PREVIOUS) { 1009 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", 1010 device->cdev_id); 1011 data->read_back_op = READ_BACKWARD; 1012 } else { 1013 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", 1014 device->cdev_id); 1015 data->read_back_op = READ_PREVIOUS; 1016 } 1017 tape_3590_read_opposite(device, request); 1018 return tape_3590_erp_retry(device, request, irb); 1019 } 1020 1021 /* 1022 * Error Recovery read opposite 1023 */ 1024 static int 1025 tape_3590_erp_read_opposite(struct tape_device *device, 1026 struct tape_request *request, struct irb *irb) 1027 { 1028 switch (request->op) { 1029 case TO_RFO: 1030 /* 1031 * We did read forward, but the data could not be read. 1032 * We will read backward and then skip forward again. 1033 */ 1034 tape_3590_read_opposite(device, request); 1035 return tape_3590_erp_retry(device, request, irb); 1036 case TO_RBA: 1037 /* We tried to read forward and backward, but hat no success */ 1038 return tape_3590_erp_failed(device, request, irb, -EIO); 1039 break; 1040 default: 1041 return tape_3590_erp_failed(device, request, irb, -EIO); 1042 } 1043 } 1044 1045 /* 1046 * Print an MIM (Media Information Message) (message code f0) 1047 */ 1048 static void 1049 tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) 1050 { 1051 struct tape_3590_sense *sense; 1052 char *exception, *service; 1053 1054 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1055 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1056 1057 if (!exception || !service) 1058 goto out_nomem; 1059 1060 sense = (struct tape_3590_sense *) irb->ecw; 1061 /* Exception Message */ 1062 switch (sense->fmt.f70.emc) { 1063 case 0x02: 1064 snprintf(exception, BUFSIZE, "Data degraded"); 1065 break; 1066 case 0x03: 1067 snprintf(exception, BUFSIZE, "Data degraded in partion %i", 1068 sense->fmt.f70.mp); 1069 break; 1070 case 0x04: 1071 snprintf(exception, BUFSIZE, "Medium degraded"); 1072 break; 1073 case 0x05: 1074 snprintf(exception, BUFSIZE, "Medium degraded in partition %i", 1075 sense->fmt.f70.mp); 1076 break; 1077 case 0x06: 1078 snprintf(exception, BUFSIZE, "Block 0 Error"); 1079 break; 1080 case 0x07: 1081 snprintf(exception, BUFSIZE, "Medium Exception 0x%02x", 1082 sense->fmt.f70.md); 1083 break; 1084 default: 1085 snprintf(exception, BUFSIZE, "0x%02x", 1086 sense->fmt.f70.emc); 1087 break; 1088 } 1089 /* Service Message */ 1090 switch (sense->fmt.f70.smc) { 1091 case 0x02: 1092 snprintf(service, BUFSIZE, "Reference Media maintenance " 1093 "procedure %i", sense->fmt.f70.md); 1094 break; 1095 default: 1096 snprintf(service, BUFSIZE, "0x%02x", 1097 sense->fmt.f70.smc); 1098 break; 1099 } 1100 1101 dev_warn (&device->cdev->dev, "Tape media information: exception %s, " 1102 "service %s\n", exception, service); 1103 1104 out_nomem: 1105 kfree(exception); 1106 kfree(service); 1107 } 1108 1109 /* 1110 * Print an I/O Subsystem Service Information Message (message code f1) 1111 */ 1112 static void 1113 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) 1114 { 1115 struct tape_3590_sense *sense; 1116 char *exception, *service; 1117 1118 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1119 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1120 1121 if (!exception || !service) 1122 goto out_nomem; 1123 1124 sense = (struct tape_3590_sense *) irb->ecw; 1125 /* Exception Message */ 1126 switch (sense->fmt.f71.emc) { 1127 case 0x01: 1128 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1129 break; 1130 case 0x02: 1131 snprintf(exception, BUFSIZE, "CU Exception - no performance " 1132 "impact"); 1133 break; 1134 case 0x03: 1135 snprintf(exception, BUFSIZE, "CU Exception on channel " 1136 "interface 0x%02x", sense->fmt.f71.md[0]); 1137 break; 1138 case 0x04: 1139 snprintf(exception, BUFSIZE, "CU Exception on device path " 1140 "0x%02x", sense->fmt.f71.md[0]); 1141 break; 1142 case 0x05: 1143 snprintf(exception, BUFSIZE, "CU Exception on library path " 1144 "0x%02x", sense->fmt.f71.md[0]); 1145 break; 1146 case 0x06: 1147 snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x", 1148 sense->fmt.f71.md[0]); 1149 break; 1150 case 0x07: 1151 snprintf(exception, BUFSIZE, "CU Exception on partition " 1152 "0x%02x", sense->fmt.f71.md[0]); 1153 break; 1154 default: 1155 snprintf(exception, BUFSIZE, "0x%02x", 1156 sense->fmt.f71.emc); 1157 } 1158 /* Service Message */ 1159 switch (sense->fmt.f71.smc) { 1160 case 0x01: 1161 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1162 break; 1163 case 0x02: 1164 snprintf(service, BUFSIZE, "Repair will not impact cu " 1165 "performance"); 1166 break; 1167 case 0x03: 1168 if (sense->fmt.f71.mdf == 0) 1169 snprintf(service, BUFSIZE, "Repair will disable node " 1170 "0x%x on CU", sense->fmt.f71.md[1]); 1171 else 1172 snprintf(service, BUFSIZE, "Repair will disable " 1173 "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1], 1174 sense->fmt.f71.md[2]); 1175 break; 1176 case 0x04: 1177 if (sense->fmt.f71.mdf == 0) 1178 snprintf(service, BUFSIZE, "Repair will disable " 1179 "channel path 0x%x on CU", 1180 sense->fmt.f71.md[1]); 1181 else 1182 snprintf(service, BUFSIZE, "Repair will disable cannel" 1183 " paths (0x%x-0x%x) on CU", 1184 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1185 break; 1186 case 0x05: 1187 if (sense->fmt.f71.mdf == 0) 1188 snprintf(service, BUFSIZE, "Repair will disable device" 1189 " path 0x%x on CU", sense->fmt.f71.md[1]); 1190 else 1191 snprintf(service, BUFSIZE, "Repair will disable device" 1192 " paths (0x%x-0x%x) on CU", 1193 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1194 break; 1195 case 0x06: 1196 if (sense->fmt.f71.mdf == 0) 1197 snprintf(service, BUFSIZE, "Repair will disable " 1198 "library path 0x%x on CU", 1199 sense->fmt.f71.md[1]); 1200 else 1201 snprintf(service, BUFSIZE, "Repair will disable " 1202 "library paths (0x%x-0x%x) on CU", 1203 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1204 break; 1205 case 0x07: 1206 snprintf(service, BUFSIZE, "Repair will disable access to CU"); 1207 break; 1208 default: 1209 snprintf(service, BUFSIZE, "0x%02x", 1210 sense->fmt.f71.smc); 1211 } 1212 1213 dev_warn (&device->cdev->dev, "I/O subsystem information: exception" 1214 " %s, service %s\n", exception, service); 1215 out_nomem: 1216 kfree(exception); 1217 kfree(service); 1218 } 1219 1220 /* 1221 * Print an Device Subsystem Service Information Message (message code f2) 1222 */ 1223 static void 1224 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) 1225 { 1226 struct tape_3590_sense *sense; 1227 char *exception, *service; 1228 1229 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1230 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1231 1232 if (!exception || !service) 1233 goto out_nomem; 1234 1235 sense = (struct tape_3590_sense *) irb->ecw; 1236 /* Exception Message */ 1237 switch (sense->fmt.f71.emc) { 1238 case 0x01: 1239 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1240 break; 1241 case 0x02: 1242 snprintf(exception, BUFSIZE, "DV Exception - no performance" 1243 " impact"); 1244 break; 1245 case 0x03: 1246 snprintf(exception, BUFSIZE, "DV Exception on channel " 1247 "interface 0x%02x", sense->fmt.f71.md[0]); 1248 break; 1249 case 0x04: 1250 snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x", 1251 sense->fmt.f71.md[0]); 1252 break; 1253 case 0x05: 1254 snprintf(exception, BUFSIZE, "DV Exception on message display" 1255 " 0x%02x", sense->fmt.f71.md[0]); 1256 break; 1257 case 0x06: 1258 snprintf(exception, BUFSIZE, "DV Exception in tape path"); 1259 break; 1260 case 0x07: 1261 snprintf(exception, BUFSIZE, "DV Exception in drive"); 1262 break; 1263 default: 1264 snprintf(exception, BUFSIZE, "0x%02x", 1265 sense->fmt.f71.emc); 1266 } 1267 /* Service Message */ 1268 switch (sense->fmt.f71.smc) { 1269 case 0x01: 1270 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1271 break; 1272 case 0x02: 1273 snprintf(service, BUFSIZE, "Repair will not impact device " 1274 "performance"); 1275 break; 1276 case 0x03: 1277 if (sense->fmt.f71.mdf == 0) 1278 snprintf(service, BUFSIZE, "Repair will disable " 1279 "channel path 0x%x on DV", 1280 sense->fmt.f71.md[1]); 1281 else 1282 snprintf(service, BUFSIZE, "Repair will disable " 1283 "channel path (0x%x-0x%x) on DV", 1284 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1285 break; 1286 case 0x04: 1287 if (sense->fmt.f71.mdf == 0) 1288 snprintf(service, BUFSIZE, "Repair will disable " 1289 "interface 0x%x on DV", sense->fmt.f71.md[1]); 1290 else 1291 snprintf(service, BUFSIZE, "Repair will disable " 1292 "interfaces (0x%x-0x%x) on DV", 1293 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1294 break; 1295 case 0x05: 1296 if (sense->fmt.f71.mdf == 0) 1297 snprintf(service, BUFSIZE, "Repair will disable loader" 1298 " 0x%x on DV", sense->fmt.f71.md[1]); 1299 else 1300 snprintf(service, BUFSIZE, "Repair will disable loader" 1301 " (0x%x-0x%x) on DV", 1302 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1303 break; 1304 case 0x07: 1305 snprintf(service, BUFSIZE, "Repair will disable access to DV"); 1306 break; 1307 case 0x08: 1308 if (sense->fmt.f71.mdf == 0) 1309 snprintf(service, BUFSIZE, "Repair will disable " 1310 "message display 0x%x on DV", 1311 sense->fmt.f71.md[1]); 1312 else 1313 snprintf(service, BUFSIZE, "Repair will disable " 1314 "message displays (0x%x-0x%x) on DV", 1315 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1316 break; 1317 case 0x09: 1318 snprintf(service, BUFSIZE, "Clean DV"); 1319 break; 1320 default: 1321 snprintf(service, BUFSIZE, "0x%02x", 1322 sense->fmt.f71.smc); 1323 } 1324 1325 dev_warn (&device->cdev->dev, "Device subsystem information: exception" 1326 " %s, service %s\n", exception, service); 1327 out_nomem: 1328 kfree(exception); 1329 kfree(service); 1330 } 1331 1332 /* 1333 * Print standard ERA Message 1334 */ 1335 static void 1336 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) 1337 { 1338 struct tape_3590_sense *sense; 1339 1340 sense = (struct tape_3590_sense *) irb->ecw; 1341 if (sense->mc == 0) 1342 return; 1343 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { 1344 if (tape_3590_msg[sense->mc] != NULL) 1345 dev_warn (&device->cdev->dev, "The tape unit has " 1346 "issued sense message %s\n", 1347 tape_3590_msg[sense->mc]); 1348 else 1349 dev_warn (&device->cdev->dev, "The tape unit has " 1350 "issued an unknown sense message code 0x%x\n", 1351 sense->mc); 1352 return; 1353 } 1354 if (sense->mc == 0xf0) { 1355 /* Standard Media Information Message */ 1356 dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, " 1357 "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc, 1358 sense->fmt.f70.emc, sense->fmt.f70.smc, 1359 sense->fmt.f70.refcode, sense->fmt.f70.mid, 1360 sense->fmt.f70.fid); 1361 tape_3590_print_mim_msg_f0(device, irb); 1362 return; 1363 } 1364 if (sense->mc == 0xf1) { 1365 /* Standard I/O Subsystem Service Information Message */ 1366 dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x," 1367 " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1368 sense->fmt.f71.sev, device->cdev->id.dev_model, 1369 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1370 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1371 sense->fmt.f71.refcode3); 1372 tape_3590_print_io_sim_msg_f1(device, irb); 1373 return; 1374 } 1375 if (sense->mc == 0xf2) { 1376 /* Standard Device Service Information Message */ 1377 dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x" 1378 ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1379 sense->fmt.f71.sev, device->cdev->id.dev_model, 1380 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1381 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1382 sense->fmt.f71.refcode3); 1383 tape_3590_print_dev_sim_msg_f2(device, irb); 1384 return; 1385 } 1386 if (sense->mc == 0xf3) { 1387 /* Standard Library Service Information Message */ 1388 return; 1389 } 1390 dev_warn (&device->cdev->dev, "The tape unit has issued an unknown " 1391 "sense message code %x\n", sense->mc); 1392 } 1393 1394 static int tape_3590_crypt_error(struct tape_device *device, 1395 struct tape_request *request, struct irb *irb) 1396 { 1397 u8 cu_rc, ekm_rc1; 1398 u16 ekm_rc2; 1399 u32 drv_rc; 1400 const char *bus_id; 1401 char *sense; 1402 1403 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; 1404 bus_id = dev_name(&device->cdev->dev); 1405 cu_rc = sense[0]; 1406 drv_rc = *((u32*) &sense[5]) & 0xffffff; 1407 ekm_rc1 = sense[9]; 1408 ekm_rc2 = *((u16*) &sense[10]); 1409 if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) 1410 /* key not defined on EKM */ 1411 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); 1412 if ((cu_rc == 1) || (cu_rc == 2)) 1413 /* No connection to EKM */ 1414 return tape_3590_erp_basic(device, request, irb, -ENOTCONN); 1415 1416 dev_err (&device->cdev->dev, "The tape unit failed to obtain the " 1417 "encryption key from EKM\n"); 1418 1419 return tape_3590_erp_basic(device, request, irb, -ENOKEY); 1420 } 1421 1422 /* 1423 * 3590 error Recovery routine: 1424 * If possible, it tries to recover from the error. If this is not possible, 1425 * inform the user about the problem. 1426 */ 1427 static int 1428 tape_3590_unit_check(struct tape_device *device, struct tape_request *request, 1429 struct irb *irb) 1430 { 1431 struct tape_3590_sense *sense; 1432 int rc; 1433 1434 #ifdef CONFIG_S390_TAPE_BLOCK 1435 if (request->op == TO_BLOCK) { 1436 /* 1437 * Recovery for block device requests. Set the block_position 1438 * to something invalid and retry. 1439 */ 1440 device->blk_data.block_position = -1; 1441 if (request->retries-- <= 0) 1442 return tape_3590_erp_failed(device, request, irb, -EIO); 1443 else 1444 return tape_3590_erp_retry(device, request, irb); 1445 } 1446 #endif 1447 1448 sense = (struct tape_3590_sense *) irb->ecw; 1449 1450 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); 1451 1452 /* 1453 * First check all RC-QRCs where we want to do something special 1454 * - "break": basic error recovery is done 1455 * - "goto out:": just print error message if available 1456 */ 1457 rc = -EIO; 1458 switch (sense->rc_rqc) { 1459 1460 case 0x1110: 1461 tape_3590_print_era_msg(device, irb); 1462 return tape_3590_erp_read_buf_log(device, request, irb); 1463 1464 case 0x2011: 1465 tape_3590_print_era_msg(device, irb); 1466 return tape_3590_erp_read_alternate(device, request, irb); 1467 1468 case 0x2230: 1469 case 0x2231: 1470 tape_3590_print_era_msg(device, irb); 1471 return tape_3590_erp_special_interrupt(device, request, irb); 1472 case 0x2240: 1473 return tape_3590_crypt_error(device, request, irb); 1474 1475 case 0x3010: 1476 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", 1477 device->cdev_id); 1478 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1479 case 0x3012: 1480 DBF_EVENT(2, "(%08x): Forward at End of Partition\n", 1481 device->cdev_id); 1482 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1483 case 0x3020: 1484 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); 1485 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1486 1487 case 0x3122: 1488 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", 1489 device->cdev_id); 1490 return tape_3590_erp_basic(device, request, irb, -EIO); 1491 case 0x3123: 1492 DBF_EVENT(2, "(%08x): Rewind Unload complete\n", 1493 device->cdev_id); 1494 tape_med_state_set(device, MS_UNLOADED); 1495 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1496 return tape_3590_erp_basic(device, request, irb, 0); 1497 1498 case 0x4010: 1499 /* 1500 * print additional msg since default msg 1501 * "device intervention" is not very meaningfull 1502 */ 1503 tape_med_state_set(device, MS_UNLOADED); 1504 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1505 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1506 case 0x4012: /* Device Long Busy */ 1507 /* XXX: Also use long busy handling here? */ 1508 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); 1509 tape_3590_print_era_msg(device, irb); 1510 return tape_3590_erp_basic(device, request, irb, -EBUSY); 1511 case 0x4014: 1512 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); 1513 return tape_3590_erp_long_busy(device, request, irb); 1514 1515 case 0x5010: 1516 if (sense->rac == 0xd0) { 1517 /* Swap */ 1518 tape_3590_print_era_msg(device, irb); 1519 return tape_3590_erp_swap(device, request, irb); 1520 } 1521 if (sense->rac == 0x26) { 1522 /* Read Opposite */ 1523 tape_3590_print_era_msg(device, irb); 1524 return tape_3590_erp_read_opposite(device, request, 1525 irb); 1526 } 1527 return tape_3590_erp_basic(device, request, irb, -EIO); 1528 case 0x5020: 1529 case 0x5021: 1530 case 0x5022: 1531 case 0x5040: 1532 case 0x5041: 1533 case 0x5042: 1534 tape_3590_print_era_msg(device, irb); 1535 return tape_3590_erp_swap(device, request, irb); 1536 1537 case 0x5110: 1538 case 0x5111: 1539 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1540 1541 case 0x5120: 1542 case 0x1120: 1543 tape_med_state_set(device, MS_UNLOADED); 1544 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1545 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1546 1547 case 0x6020: 1548 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1549 1550 case 0x8011: 1551 return tape_3590_erp_basic(device, request, irb, -EPERM); 1552 case 0x8013: 1553 dev_warn (&device->cdev->dev, "A different host has privileged" 1554 " access to the tape unit\n"); 1555 return tape_3590_erp_basic(device, request, irb, -EPERM); 1556 default: 1557 return tape_3590_erp_basic(device, request, irb, -EIO); 1558 } 1559 } 1560 1561 /* 1562 * 3590 interrupt handler: 1563 */ 1564 static int 1565 tape_3590_irq(struct tape_device *device, struct tape_request *request, 1566 struct irb *irb) 1567 { 1568 if (request == NULL) 1569 return tape_3590_unsolicited_irq(device, irb); 1570 1571 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && 1572 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && 1573 (request->op == TO_WRI)) { 1574 /* Write at end of volume */ 1575 DBF_EVENT(2, "End of volume\n"); 1576 return tape_3590_erp_failed(device, request, irb, -ENOSPC); 1577 } 1578 1579 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) 1580 return tape_3590_unit_check(device, request, irb); 1581 1582 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { 1583 if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) { 1584 if (request->op == TO_FSB || request->op == TO_BSB) 1585 request->rescnt++; 1586 else 1587 DBF_EVENT(5, "Unit Exception!\n"); 1588 } 1589 1590 return tape_3590_done(device, request); 1591 } 1592 1593 if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) { 1594 DBF_EVENT(2, "cannel end\n"); 1595 return TAPE_IO_PENDING; 1596 } 1597 1598 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 1599 DBF_EVENT(2, "Unit Attention when busy..\n"); 1600 return TAPE_IO_PENDING; 1601 } 1602 1603 DBF_EVENT(6, "xunknownirq\n"); 1604 tape_dump_sense_dbf(device, request, irb); 1605 return TAPE_IO_STOP; 1606 } 1607 1608 1609 static int tape_3590_read_dev_chars(struct tape_device *device, 1610 struct tape_3590_rdc_data *rdc_data) 1611 { 1612 int rc; 1613 struct tape_request *request; 1614 1615 request = tape_alloc_request(1, sizeof(*rdc_data)); 1616 if (IS_ERR(request)) 1617 return PTR_ERR(request); 1618 request->op = TO_RDC; 1619 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), 1620 request->cpdata); 1621 rc = tape_do_io(device, request); 1622 if (rc == 0) 1623 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); 1624 tape_free_request(request); 1625 return rc; 1626 } 1627 1628 /* 1629 * Setup device function 1630 */ 1631 static int 1632 tape_3590_setup_device(struct tape_device *device) 1633 { 1634 int rc; 1635 struct tape_3590_disc_data *data; 1636 struct tape_3590_rdc_data *rdc_data; 1637 1638 DBF_EVENT(6, "3590 device setup\n"); 1639 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); 1640 if (data == NULL) 1641 return -ENOMEM; 1642 data->read_back_op = READ_PREVIOUS; 1643 device->discdata = data; 1644 1645 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); 1646 if (!rdc_data) { 1647 rc = -ENOMEM; 1648 goto fail_kmalloc; 1649 } 1650 rc = tape_3590_read_dev_chars(device, rdc_data); 1651 if (rc) { 1652 DBF_LH(3, "Read device characteristics failed!\n"); 1653 goto fail_rdc_data; 1654 } 1655 rc = tape_std_assign(device); 1656 if (rc) 1657 goto fail_rdc_data; 1658 if (rdc_data->data[31] == 0x13) { 1659 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; 1660 tape_3592_disable_crypt(device); 1661 } else { 1662 DBF_EVENT(6, "Device has NO crypto support\n"); 1663 } 1664 /* Try to find out if medium is loaded */ 1665 rc = tape_3590_sense_medium(device); 1666 if (rc) { 1667 DBF_LH(3, "3590 medium sense returned %d\n", rc); 1668 goto fail_rdc_data; 1669 } 1670 return 0; 1671 1672 fail_rdc_data: 1673 kfree(rdc_data); 1674 fail_kmalloc: 1675 kfree(data); 1676 return rc; 1677 } 1678 1679 /* 1680 * Cleanup device function 1681 */ 1682 static void 1683 tape_3590_cleanup_device(struct tape_device *device) 1684 { 1685 flush_workqueue(tape_3590_wq); 1686 tape_std_unassign(device); 1687 1688 kfree(device->discdata); 1689 device->discdata = NULL; 1690 } 1691 1692 /* 1693 * List of 3590 magnetic tape commands. 1694 */ 1695 static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { 1696 [MTRESET] = tape_std_mtreset, 1697 [MTFSF] = tape_std_mtfsf, 1698 [MTBSF] = tape_std_mtbsf, 1699 [MTFSR] = tape_std_mtfsr, 1700 [MTBSR] = tape_std_mtbsr, 1701 [MTWEOF] = tape_std_mtweof, 1702 [MTREW] = tape_std_mtrew, 1703 [MTOFFL] = tape_std_mtoffl, 1704 [MTNOP] = tape_std_mtnop, 1705 [MTRETEN] = tape_std_mtreten, 1706 [MTBSFM] = tape_std_mtbsfm, 1707 [MTFSFM] = tape_std_mtfsfm, 1708 [MTEOM] = tape_std_mteom, 1709 [MTERASE] = tape_std_mterase, 1710 [MTRAS1] = NULL, 1711 [MTRAS2] = NULL, 1712 [MTRAS3] = NULL, 1713 [MTSETBLK] = tape_std_mtsetblk, 1714 [MTSETDENSITY] = NULL, 1715 [MTSEEK] = tape_3590_mtseek, 1716 [MTTELL] = tape_3590_mttell, 1717 [MTSETDRVBUFFER] = NULL, 1718 [MTFSS] = NULL, 1719 [MTBSS] = NULL, 1720 [MTWSM] = NULL, 1721 [MTLOCK] = NULL, 1722 [MTUNLOCK] = NULL, 1723 [MTLOAD] = tape_std_mtload, 1724 [MTUNLOAD] = tape_std_mtunload, 1725 [MTCOMPRESSION] = tape_std_mtcompression, 1726 [MTSETPART] = NULL, 1727 [MTMKPART] = NULL 1728 }; 1729 1730 /* 1731 * Tape discipline structure for 3590. 1732 */ 1733 static struct tape_discipline tape_discipline_3590 = { 1734 .owner = THIS_MODULE, 1735 .setup_device = tape_3590_setup_device, 1736 .cleanup_device = tape_3590_cleanup_device, 1737 .process_eov = tape_std_process_eov, 1738 .irq = tape_3590_irq, 1739 .read_block = tape_std_read_block, 1740 .write_block = tape_std_write_block, 1741 #ifdef CONFIG_S390_TAPE_BLOCK 1742 .bread = tape_3590_bread, 1743 .free_bread = tape_3590_free_bread, 1744 .check_locate = tape_3590_check_locate, 1745 #endif 1746 .ioctl_fn = tape_3590_ioctl, 1747 .mtop_array = tape_3590_mtop 1748 }; 1749 1750 static struct ccw_device_id tape_3590_ids[] = { 1751 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, 1752 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, 1753 { /* end of list */ } 1754 }; 1755 1756 static int 1757 tape_3590_online(struct ccw_device *cdev) 1758 { 1759 return tape_generic_online(dev_get_drvdata(&cdev->dev), 1760 &tape_discipline_3590); 1761 } 1762 1763 static struct ccw_driver tape_3590_driver = { 1764 .name = "tape_3590", 1765 .owner = THIS_MODULE, 1766 .ids = tape_3590_ids, 1767 .probe = tape_generic_probe, 1768 .remove = tape_generic_remove, 1769 .set_offline = tape_generic_offline, 1770 .set_online = tape_3590_online, 1771 .freeze = tape_generic_pm_suspend, 1772 }; 1773 1774 /* 1775 * Setup discipline structure. 1776 */ 1777 static int 1778 tape_3590_init(void) 1779 { 1780 int rc; 1781 1782 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); 1783 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); 1784 #ifdef DBF_LIKE_HELL 1785 debug_set_level(TAPE_DBF_AREA, 6); 1786 #endif 1787 1788 DBF_EVENT(3, "3590 init\n"); 1789 1790 tape_3590_wq = alloc_workqueue("tape_3590", 0, 0); 1791 if (!tape_3590_wq) 1792 return -ENOMEM; 1793 1794 /* Register driver for 3590 tapes. */ 1795 rc = ccw_driver_register(&tape_3590_driver); 1796 if (rc) { 1797 destroy_workqueue(tape_3590_wq); 1798 DBF_EVENT(3, "3590 init failed\n"); 1799 } else 1800 DBF_EVENT(3, "3590 registered\n"); 1801 return rc; 1802 } 1803 1804 static void 1805 tape_3590_exit(void) 1806 { 1807 ccw_driver_unregister(&tape_3590_driver); 1808 destroy_workqueue(tape_3590_wq); 1809 debug_unregister(TAPE_DBF_AREA); 1810 } 1811 1812 MODULE_DEVICE_TABLE(ccw, tape_3590_ids); 1813 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); 1814 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); 1815 MODULE_LICENSE("GPL"); 1816 1817 module_init(tape_3590_init); 1818 module_exit(tape_3590_exit); 1819