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 { 799 800 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); 801 802 switch (request->op) { 803 case TO_BSB: 804 case TO_BSF: 805 case TO_DSE: 806 case TO_FSB: 807 case TO_FSF: 808 case TO_LBL: 809 case TO_RFO: 810 case TO_RBA: 811 case TO_REW: 812 case TO_WRI: 813 case TO_WTM: 814 case TO_BLOCK: 815 case TO_LOAD: 816 tape_med_state_set(device, MS_LOADED); 817 break; 818 case TO_RUN: 819 tape_med_state_set(device, MS_UNLOADED); 820 tape_3590_schedule_work(device, TO_CRYPT_OFF); 821 break; 822 case TO_MSEN: 823 tape_3590_med_state_set(device, request->cpdata); 824 break; 825 case TO_CRYPT_ON: 826 TAPE_3590_CRYPT_INFO(device).status 827 |= TAPE390_CRYPT_ON_MASK; 828 *(device->modeset_byte) |= 0x03; 829 break; 830 case TO_CRYPT_OFF: 831 TAPE_3590_CRYPT_INFO(device).status 832 &= ~TAPE390_CRYPT_ON_MASK; 833 *(device->modeset_byte) &= ~0x03; 834 break; 835 case TO_RBI: /* RBI seems to succeed even without medium loaded. */ 836 case TO_NOP: /* Same to NOP. */ 837 case TO_READ_CONFIG: 838 case TO_READ_ATTMSG: 839 case TO_DIS: 840 case TO_ASSIGN: 841 case TO_UNASSIGN: 842 case TO_SIZE: 843 case TO_KEKL_SET: 844 case TO_KEKL_QUERY: 845 case TO_RDC: 846 break; 847 } 848 return TAPE_IO_SUCCESS; 849 } 850 851 /* 852 * This function is called, when error recovery was successful 853 */ 854 static inline int 855 tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) 856 { 857 DBF_EVENT(3, "Error Recovery successful for %s\n", 858 tape_op_verbose[request->op]); 859 return tape_3590_done(device, request); 860 } 861 862 /* 863 * This function is called, when error recovery was not successful 864 */ 865 static inline int 866 tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, 867 struct irb *irb, int rc) 868 { 869 DBF_EVENT(3, "Error Recovery failed for %s\n", 870 tape_op_verbose[request->op]); 871 tape_dump_sense_dbf(device, request, irb); 872 return rc; 873 } 874 875 /* 876 * Error Recovery do retry 877 */ 878 static inline int 879 tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, 880 struct irb *irb) 881 { 882 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); 883 tape_dump_sense_dbf(device, request, irb); 884 return TAPE_IO_RETRY; 885 } 886 887 /* 888 * Handle unsolicited interrupts 889 */ 890 static int 891 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) 892 { 893 if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END) 894 /* Probably result of halt ssch */ 895 return TAPE_IO_PENDING; 896 else if (irb->scsw.cmd.dstat == 0x85) 897 /* Device Ready */ 898 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); 899 else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 900 tape_3590_schedule_work(device, TO_READ_ATTMSG); 901 } else { 902 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); 903 tape_dump_sense_dbf(device, NULL, irb); 904 } 905 /* check medium state */ 906 tape_3590_schedule_work(device, TO_MSEN); 907 return TAPE_IO_SUCCESS; 908 } 909 910 /* 911 * Basic Recovery routine 912 */ 913 static int 914 tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, 915 struct irb *irb, int rc) 916 { 917 struct tape_3590_sense *sense; 918 919 sense = (struct tape_3590_sense *) irb->ecw; 920 921 switch (sense->bra) { 922 case SENSE_BRA_PER: 923 return tape_3590_erp_failed(device, request, irb, rc); 924 case SENSE_BRA_CONT: 925 return tape_3590_erp_succeded(device, request); 926 case SENSE_BRA_RE: 927 return tape_3590_erp_retry(device, request, irb); 928 case SENSE_BRA_DRE: 929 return tape_3590_erp_failed(device, request, irb, rc); 930 default: 931 BUG(); 932 return TAPE_IO_STOP; 933 } 934 } 935 936 /* 937 * RDL: Read Device (buffered) log 938 */ 939 static int 940 tape_3590_erp_read_buf_log(struct tape_device *device, 941 struct tape_request *request, struct irb *irb) 942 { 943 /* 944 * We just do the basic error recovery at the moment (retry). 945 * Perhaps in the future, we read the log and dump it somewhere... 946 */ 947 return tape_3590_erp_basic(device, request, irb, -EIO); 948 } 949 950 /* 951 * SWAP: Swap Devices 952 */ 953 static int 954 tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, 955 struct irb *irb) 956 { 957 /* 958 * This error recovery should swap the tapes 959 * if the original has a problem. The operation 960 * should proceed with the new tape... this 961 * should probably be done in user space! 962 */ 963 dev_warn (&device->cdev->dev, "The tape medium must be loaded into a " 964 "different tape unit\n"); 965 return tape_3590_erp_basic(device, request, irb, -EIO); 966 } 967 968 /* 969 * LBY: Long Busy 970 */ 971 static int 972 tape_3590_erp_long_busy(struct tape_device *device, 973 struct tape_request *request, struct irb *irb) 974 { 975 DBF_EVENT(6, "Device is busy\n"); 976 return TAPE_IO_LONG_BUSY; 977 } 978 979 /* 980 * SPI: Special Intercept 981 */ 982 static int 983 tape_3590_erp_special_interrupt(struct tape_device *device, 984 struct tape_request *request, struct irb *irb) 985 { 986 return tape_3590_erp_basic(device, request, irb, -EIO); 987 } 988 989 /* 990 * RDA: Read Alternate 991 */ 992 static int 993 tape_3590_erp_read_alternate(struct tape_device *device, 994 struct tape_request *request, struct irb *irb) 995 { 996 struct tape_3590_disc_data *data; 997 998 /* 999 * The issued Read Backward or Read Previous command is not 1000 * supported by the device 1001 * The recovery action should be to issue another command: 1002 * Read Revious: if Read Backward is not supported 1003 * Read Backward: if Read Previous is not supported 1004 */ 1005 data = device->discdata; 1006 if (data->read_back_op == READ_PREVIOUS) { 1007 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", 1008 device->cdev_id); 1009 data->read_back_op = READ_BACKWARD; 1010 } else { 1011 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", 1012 device->cdev_id); 1013 data->read_back_op = READ_PREVIOUS; 1014 } 1015 tape_3590_read_opposite(device, request); 1016 return tape_3590_erp_retry(device, request, irb); 1017 } 1018 1019 /* 1020 * Error Recovery read opposite 1021 */ 1022 static int 1023 tape_3590_erp_read_opposite(struct tape_device *device, 1024 struct tape_request *request, struct irb *irb) 1025 { 1026 switch (request->op) { 1027 case TO_RFO: 1028 /* 1029 * We did read forward, but the data could not be read. 1030 * We will read backward and then skip forward again. 1031 */ 1032 tape_3590_read_opposite(device, request); 1033 return tape_3590_erp_retry(device, request, irb); 1034 case TO_RBA: 1035 /* We tried to read forward and backward, but hat no success */ 1036 return tape_3590_erp_failed(device, request, irb, -EIO); 1037 break; 1038 default: 1039 return tape_3590_erp_failed(device, request, irb, -EIO); 1040 } 1041 } 1042 1043 /* 1044 * Print an MIM (Media Information Message) (message code f0) 1045 */ 1046 static void 1047 tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) 1048 { 1049 struct tape_3590_sense *sense; 1050 char *exception, *service; 1051 1052 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1053 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1054 1055 if (!exception || !service) 1056 goto out_nomem; 1057 1058 sense = (struct tape_3590_sense *) irb->ecw; 1059 /* Exception Message */ 1060 switch (sense->fmt.f70.emc) { 1061 case 0x02: 1062 snprintf(exception, BUFSIZE, "Data degraded"); 1063 break; 1064 case 0x03: 1065 snprintf(exception, BUFSIZE, "Data degraded in partion %i", 1066 sense->fmt.f70.mp); 1067 break; 1068 case 0x04: 1069 snprintf(exception, BUFSIZE, "Medium degraded"); 1070 break; 1071 case 0x05: 1072 snprintf(exception, BUFSIZE, "Medium degraded in partition %i", 1073 sense->fmt.f70.mp); 1074 break; 1075 case 0x06: 1076 snprintf(exception, BUFSIZE, "Block 0 Error"); 1077 break; 1078 case 0x07: 1079 snprintf(exception, BUFSIZE, "Medium Exception 0x%02x", 1080 sense->fmt.f70.md); 1081 break; 1082 default: 1083 snprintf(exception, BUFSIZE, "0x%02x", 1084 sense->fmt.f70.emc); 1085 break; 1086 } 1087 /* Service Message */ 1088 switch (sense->fmt.f70.smc) { 1089 case 0x02: 1090 snprintf(service, BUFSIZE, "Reference Media maintenance " 1091 "procedure %i", sense->fmt.f70.md); 1092 break; 1093 default: 1094 snprintf(service, BUFSIZE, "0x%02x", 1095 sense->fmt.f70.smc); 1096 break; 1097 } 1098 1099 dev_warn (&device->cdev->dev, "Tape media information: exception %s, " 1100 "service %s\n", exception, service); 1101 1102 out_nomem: 1103 kfree(exception); 1104 kfree(service); 1105 } 1106 1107 /* 1108 * Print an I/O Subsystem Service Information Message (message code f1) 1109 */ 1110 static void 1111 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) 1112 { 1113 struct tape_3590_sense *sense; 1114 char *exception, *service; 1115 1116 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1117 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1118 1119 if (!exception || !service) 1120 goto out_nomem; 1121 1122 sense = (struct tape_3590_sense *) irb->ecw; 1123 /* Exception Message */ 1124 switch (sense->fmt.f71.emc) { 1125 case 0x01: 1126 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1127 break; 1128 case 0x02: 1129 snprintf(exception, BUFSIZE, "CU Exception - no performance " 1130 "impact"); 1131 break; 1132 case 0x03: 1133 snprintf(exception, BUFSIZE, "CU Exception on channel " 1134 "interface 0x%02x", sense->fmt.f71.md[0]); 1135 break; 1136 case 0x04: 1137 snprintf(exception, BUFSIZE, "CU Exception on device path " 1138 "0x%02x", sense->fmt.f71.md[0]); 1139 break; 1140 case 0x05: 1141 snprintf(exception, BUFSIZE, "CU Exception on library path " 1142 "0x%02x", sense->fmt.f71.md[0]); 1143 break; 1144 case 0x06: 1145 snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x", 1146 sense->fmt.f71.md[0]); 1147 break; 1148 case 0x07: 1149 snprintf(exception, BUFSIZE, "CU Exception on partition " 1150 "0x%02x", sense->fmt.f71.md[0]); 1151 break; 1152 default: 1153 snprintf(exception, BUFSIZE, "0x%02x", 1154 sense->fmt.f71.emc); 1155 } 1156 /* Service Message */ 1157 switch (sense->fmt.f71.smc) { 1158 case 0x01: 1159 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1160 break; 1161 case 0x02: 1162 snprintf(service, BUFSIZE, "Repair will not impact cu " 1163 "performance"); 1164 break; 1165 case 0x03: 1166 if (sense->fmt.f71.mdf == 0) 1167 snprintf(service, BUFSIZE, "Repair will disable node " 1168 "0x%x on CU", sense->fmt.f71.md[1]); 1169 else 1170 snprintf(service, BUFSIZE, "Repair will disable " 1171 "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1], 1172 sense->fmt.f71.md[2]); 1173 break; 1174 case 0x04: 1175 if (sense->fmt.f71.mdf == 0) 1176 snprintf(service, BUFSIZE, "Repair will disable " 1177 "channel path 0x%x on CU", 1178 sense->fmt.f71.md[1]); 1179 else 1180 snprintf(service, BUFSIZE, "Repair will disable cannel" 1181 " paths (0x%x-0x%x) on CU", 1182 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1183 break; 1184 case 0x05: 1185 if (sense->fmt.f71.mdf == 0) 1186 snprintf(service, BUFSIZE, "Repair will disable device" 1187 " path 0x%x on CU", sense->fmt.f71.md[1]); 1188 else 1189 snprintf(service, BUFSIZE, "Repair will disable device" 1190 " paths (0x%x-0x%x) on CU", 1191 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1192 break; 1193 case 0x06: 1194 if (sense->fmt.f71.mdf == 0) 1195 snprintf(service, BUFSIZE, "Repair will disable " 1196 "library path 0x%x on CU", 1197 sense->fmt.f71.md[1]); 1198 else 1199 snprintf(service, BUFSIZE, "Repair will disable " 1200 "library paths (0x%x-0x%x) on CU", 1201 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1202 break; 1203 case 0x07: 1204 snprintf(service, BUFSIZE, "Repair will disable access to CU"); 1205 break; 1206 default: 1207 snprintf(service, BUFSIZE, "0x%02x", 1208 sense->fmt.f71.smc); 1209 } 1210 1211 dev_warn (&device->cdev->dev, "I/O subsystem information: exception" 1212 " %s, service %s\n", exception, service); 1213 out_nomem: 1214 kfree(exception); 1215 kfree(service); 1216 } 1217 1218 /* 1219 * Print an Device Subsystem Service Information Message (message code f2) 1220 */ 1221 static void 1222 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) 1223 { 1224 struct tape_3590_sense *sense; 1225 char *exception, *service; 1226 1227 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1228 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1229 1230 if (!exception || !service) 1231 goto out_nomem; 1232 1233 sense = (struct tape_3590_sense *) irb->ecw; 1234 /* Exception Message */ 1235 switch (sense->fmt.f71.emc) { 1236 case 0x01: 1237 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1238 break; 1239 case 0x02: 1240 snprintf(exception, BUFSIZE, "DV Exception - no performance" 1241 " impact"); 1242 break; 1243 case 0x03: 1244 snprintf(exception, BUFSIZE, "DV Exception on channel " 1245 "interface 0x%02x", sense->fmt.f71.md[0]); 1246 break; 1247 case 0x04: 1248 snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x", 1249 sense->fmt.f71.md[0]); 1250 break; 1251 case 0x05: 1252 snprintf(exception, BUFSIZE, "DV Exception on message display" 1253 " 0x%02x", sense->fmt.f71.md[0]); 1254 break; 1255 case 0x06: 1256 snprintf(exception, BUFSIZE, "DV Exception in tape path"); 1257 break; 1258 case 0x07: 1259 snprintf(exception, BUFSIZE, "DV Exception in drive"); 1260 break; 1261 default: 1262 snprintf(exception, BUFSIZE, "0x%02x", 1263 sense->fmt.f71.emc); 1264 } 1265 /* Service Message */ 1266 switch (sense->fmt.f71.smc) { 1267 case 0x01: 1268 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1269 break; 1270 case 0x02: 1271 snprintf(service, BUFSIZE, "Repair will not impact device " 1272 "performance"); 1273 break; 1274 case 0x03: 1275 if (sense->fmt.f71.mdf == 0) 1276 snprintf(service, BUFSIZE, "Repair will disable " 1277 "channel path 0x%x on DV", 1278 sense->fmt.f71.md[1]); 1279 else 1280 snprintf(service, BUFSIZE, "Repair will disable " 1281 "channel path (0x%x-0x%x) on DV", 1282 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1283 break; 1284 case 0x04: 1285 if (sense->fmt.f71.mdf == 0) 1286 snprintf(service, BUFSIZE, "Repair will disable " 1287 "interface 0x%x on DV", sense->fmt.f71.md[1]); 1288 else 1289 snprintf(service, BUFSIZE, "Repair will disable " 1290 "interfaces (0x%x-0x%x) on DV", 1291 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1292 break; 1293 case 0x05: 1294 if (sense->fmt.f71.mdf == 0) 1295 snprintf(service, BUFSIZE, "Repair will disable loader" 1296 " 0x%x on DV", sense->fmt.f71.md[1]); 1297 else 1298 snprintf(service, BUFSIZE, "Repair will disable loader" 1299 " (0x%x-0x%x) on DV", 1300 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1301 break; 1302 case 0x07: 1303 snprintf(service, BUFSIZE, "Repair will disable access to DV"); 1304 break; 1305 case 0x08: 1306 if (sense->fmt.f71.mdf == 0) 1307 snprintf(service, BUFSIZE, "Repair will disable " 1308 "message display 0x%x on DV", 1309 sense->fmt.f71.md[1]); 1310 else 1311 snprintf(service, BUFSIZE, "Repair will disable " 1312 "message displays (0x%x-0x%x) on DV", 1313 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1314 break; 1315 case 0x09: 1316 snprintf(service, BUFSIZE, "Clean DV"); 1317 break; 1318 default: 1319 snprintf(service, BUFSIZE, "0x%02x", 1320 sense->fmt.f71.smc); 1321 } 1322 1323 dev_warn (&device->cdev->dev, "Device subsystem information: exception" 1324 " %s, service %s\n", exception, service); 1325 out_nomem: 1326 kfree(exception); 1327 kfree(service); 1328 } 1329 1330 /* 1331 * Print standard ERA Message 1332 */ 1333 static void 1334 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) 1335 { 1336 struct tape_3590_sense *sense; 1337 1338 sense = (struct tape_3590_sense *) irb->ecw; 1339 if (sense->mc == 0) 1340 return; 1341 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { 1342 if (tape_3590_msg[sense->mc] != NULL) 1343 dev_warn (&device->cdev->dev, "The tape unit has " 1344 "issued sense message %s\n", 1345 tape_3590_msg[sense->mc]); 1346 else 1347 dev_warn (&device->cdev->dev, "The tape unit has " 1348 "issued an unknown sense message code 0x%x\n", 1349 sense->mc); 1350 return; 1351 } 1352 if (sense->mc == 0xf0) { 1353 /* Standard Media Information Message */ 1354 dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, " 1355 "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc, 1356 sense->fmt.f70.emc, sense->fmt.f70.smc, 1357 sense->fmt.f70.refcode, sense->fmt.f70.mid, 1358 sense->fmt.f70.fid); 1359 tape_3590_print_mim_msg_f0(device, irb); 1360 return; 1361 } 1362 if (sense->mc == 0xf1) { 1363 /* Standard I/O Subsystem Service Information Message */ 1364 dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x," 1365 " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1366 sense->fmt.f71.sev, device->cdev->id.dev_model, 1367 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1368 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1369 sense->fmt.f71.refcode3); 1370 tape_3590_print_io_sim_msg_f1(device, irb); 1371 return; 1372 } 1373 if (sense->mc == 0xf2) { 1374 /* Standard Device Service Information Message */ 1375 dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x" 1376 ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1377 sense->fmt.f71.sev, device->cdev->id.dev_model, 1378 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1379 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1380 sense->fmt.f71.refcode3); 1381 tape_3590_print_dev_sim_msg_f2(device, irb); 1382 return; 1383 } 1384 if (sense->mc == 0xf3) { 1385 /* Standard Library Service Information Message */ 1386 return; 1387 } 1388 dev_warn (&device->cdev->dev, "The tape unit has issued an unknown " 1389 "sense message code %x\n", sense->mc); 1390 } 1391 1392 static int tape_3590_crypt_error(struct tape_device *device, 1393 struct tape_request *request, struct irb *irb) 1394 { 1395 u8 cu_rc; 1396 u16 ekm_rc2; 1397 char *sense; 1398 1399 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; 1400 cu_rc = sense[0]; 1401 ekm_rc2 = *((u16*) &sense[10]); 1402 if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) 1403 /* key not defined on EKM */ 1404 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); 1405 if ((cu_rc == 1) || (cu_rc == 2)) 1406 /* No connection to EKM */ 1407 return tape_3590_erp_basic(device, request, irb, -ENOTCONN); 1408 1409 dev_err (&device->cdev->dev, "The tape unit failed to obtain the " 1410 "encryption key from EKM\n"); 1411 1412 return tape_3590_erp_basic(device, request, irb, -ENOKEY); 1413 } 1414 1415 /* 1416 * 3590 error Recovery routine: 1417 * If possible, it tries to recover from the error. If this is not possible, 1418 * inform the user about the problem. 1419 */ 1420 static int 1421 tape_3590_unit_check(struct tape_device *device, struct tape_request *request, 1422 struct irb *irb) 1423 { 1424 struct tape_3590_sense *sense; 1425 1426 #ifdef CONFIG_S390_TAPE_BLOCK 1427 if (request->op == TO_BLOCK) { 1428 /* 1429 * Recovery for block device requests. Set the block_position 1430 * to something invalid and retry. 1431 */ 1432 device->blk_data.block_position = -1; 1433 if (request->retries-- <= 0) 1434 return tape_3590_erp_failed(device, request, irb, -EIO); 1435 else 1436 return tape_3590_erp_retry(device, request, irb); 1437 } 1438 #endif 1439 1440 sense = (struct tape_3590_sense *) irb->ecw; 1441 1442 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); 1443 1444 /* 1445 * First check all RC-QRCs where we want to do something special 1446 * - "break": basic error recovery is done 1447 * - "goto out:": just print error message if available 1448 */ 1449 switch (sense->rc_rqc) { 1450 1451 case 0x1110: 1452 tape_3590_print_era_msg(device, irb); 1453 return tape_3590_erp_read_buf_log(device, request, irb); 1454 1455 case 0x2011: 1456 tape_3590_print_era_msg(device, irb); 1457 return tape_3590_erp_read_alternate(device, request, irb); 1458 1459 case 0x2230: 1460 case 0x2231: 1461 tape_3590_print_era_msg(device, irb); 1462 return tape_3590_erp_special_interrupt(device, request, irb); 1463 case 0x2240: 1464 return tape_3590_crypt_error(device, request, irb); 1465 1466 case 0x3010: 1467 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", 1468 device->cdev_id); 1469 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1470 case 0x3012: 1471 DBF_EVENT(2, "(%08x): Forward at End of Partition\n", 1472 device->cdev_id); 1473 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1474 case 0x3020: 1475 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); 1476 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1477 1478 case 0x3122: 1479 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", 1480 device->cdev_id); 1481 return tape_3590_erp_basic(device, request, irb, -EIO); 1482 case 0x3123: 1483 DBF_EVENT(2, "(%08x): Rewind Unload complete\n", 1484 device->cdev_id); 1485 tape_med_state_set(device, MS_UNLOADED); 1486 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1487 return tape_3590_erp_basic(device, request, irb, 0); 1488 1489 case 0x4010: 1490 /* 1491 * print additional msg since default msg 1492 * "device intervention" is not very meaningfull 1493 */ 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, -ENOMEDIUM); 1497 case 0x4012: /* Device Long Busy */ 1498 /* XXX: Also use long busy handling here? */ 1499 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); 1500 tape_3590_print_era_msg(device, irb); 1501 return tape_3590_erp_basic(device, request, irb, -EBUSY); 1502 case 0x4014: 1503 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); 1504 return tape_3590_erp_long_busy(device, request, irb); 1505 1506 case 0x5010: 1507 if (sense->rac == 0xd0) { 1508 /* Swap */ 1509 tape_3590_print_era_msg(device, irb); 1510 return tape_3590_erp_swap(device, request, irb); 1511 } 1512 if (sense->rac == 0x26) { 1513 /* Read Opposite */ 1514 tape_3590_print_era_msg(device, irb); 1515 return tape_3590_erp_read_opposite(device, request, 1516 irb); 1517 } 1518 return tape_3590_erp_basic(device, request, irb, -EIO); 1519 case 0x5020: 1520 case 0x5021: 1521 case 0x5022: 1522 case 0x5040: 1523 case 0x5041: 1524 case 0x5042: 1525 tape_3590_print_era_msg(device, irb); 1526 return tape_3590_erp_swap(device, request, irb); 1527 1528 case 0x5110: 1529 case 0x5111: 1530 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1531 1532 case 0x5120: 1533 case 0x1120: 1534 tape_med_state_set(device, MS_UNLOADED); 1535 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1536 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1537 1538 case 0x6020: 1539 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1540 1541 case 0x8011: 1542 return tape_3590_erp_basic(device, request, irb, -EPERM); 1543 case 0x8013: 1544 dev_warn (&device->cdev->dev, "A different host has privileged" 1545 " access to the tape unit\n"); 1546 return tape_3590_erp_basic(device, request, irb, -EPERM); 1547 default: 1548 return tape_3590_erp_basic(device, request, irb, -EIO); 1549 } 1550 } 1551 1552 /* 1553 * 3590 interrupt handler: 1554 */ 1555 static int 1556 tape_3590_irq(struct tape_device *device, struct tape_request *request, 1557 struct irb *irb) 1558 { 1559 if (request == NULL) 1560 return tape_3590_unsolicited_irq(device, irb); 1561 1562 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && 1563 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && 1564 (request->op == TO_WRI)) { 1565 /* Write at end of volume */ 1566 DBF_EVENT(2, "End of volume\n"); 1567 return tape_3590_erp_failed(device, request, irb, -ENOSPC); 1568 } 1569 1570 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) 1571 return tape_3590_unit_check(device, request, irb); 1572 1573 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { 1574 if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) { 1575 if (request->op == TO_FSB || request->op == TO_BSB) 1576 request->rescnt++; 1577 else 1578 DBF_EVENT(5, "Unit Exception!\n"); 1579 } 1580 1581 return tape_3590_done(device, request); 1582 } 1583 1584 if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) { 1585 DBF_EVENT(2, "cannel end\n"); 1586 return TAPE_IO_PENDING; 1587 } 1588 1589 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 1590 DBF_EVENT(2, "Unit Attention when busy..\n"); 1591 return TAPE_IO_PENDING; 1592 } 1593 1594 DBF_EVENT(6, "xunknownirq\n"); 1595 tape_dump_sense_dbf(device, request, irb); 1596 return TAPE_IO_STOP; 1597 } 1598 1599 1600 static int tape_3590_read_dev_chars(struct tape_device *device, 1601 struct tape_3590_rdc_data *rdc_data) 1602 { 1603 int rc; 1604 struct tape_request *request; 1605 1606 request = tape_alloc_request(1, sizeof(*rdc_data)); 1607 if (IS_ERR(request)) 1608 return PTR_ERR(request); 1609 request->op = TO_RDC; 1610 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), 1611 request->cpdata); 1612 rc = tape_do_io(device, request); 1613 if (rc == 0) 1614 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); 1615 tape_free_request(request); 1616 return rc; 1617 } 1618 1619 /* 1620 * Setup device function 1621 */ 1622 static int 1623 tape_3590_setup_device(struct tape_device *device) 1624 { 1625 int rc; 1626 struct tape_3590_disc_data *data; 1627 struct tape_3590_rdc_data *rdc_data; 1628 1629 DBF_EVENT(6, "3590 device setup\n"); 1630 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); 1631 if (data == NULL) 1632 return -ENOMEM; 1633 data->read_back_op = READ_PREVIOUS; 1634 device->discdata = data; 1635 1636 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); 1637 if (!rdc_data) { 1638 rc = -ENOMEM; 1639 goto fail_kmalloc; 1640 } 1641 rc = tape_3590_read_dev_chars(device, rdc_data); 1642 if (rc) { 1643 DBF_LH(3, "Read device characteristics failed!\n"); 1644 goto fail_rdc_data; 1645 } 1646 rc = tape_std_assign(device); 1647 if (rc) 1648 goto fail_rdc_data; 1649 if (rdc_data->data[31] == 0x13) { 1650 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; 1651 tape_3592_disable_crypt(device); 1652 } else { 1653 DBF_EVENT(6, "Device has NO crypto support\n"); 1654 } 1655 /* Try to find out if medium is loaded */ 1656 rc = tape_3590_sense_medium(device); 1657 if (rc) { 1658 DBF_LH(3, "3590 medium sense returned %d\n", rc); 1659 goto fail_rdc_data; 1660 } 1661 return 0; 1662 1663 fail_rdc_data: 1664 kfree(rdc_data); 1665 fail_kmalloc: 1666 kfree(data); 1667 return rc; 1668 } 1669 1670 /* 1671 * Cleanup device function 1672 */ 1673 static void 1674 tape_3590_cleanup_device(struct tape_device *device) 1675 { 1676 flush_workqueue(tape_3590_wq); 1677 tape_std_unassign(device); 1678 1679 kfree(device->discdata); 1680 device->discdata = NULL; 1681 } 1682 1683 /* 1684 * List of 3590 magnetic tape commands. 1685 */ 1686 static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { 1687 [MTRESET] = tape_std_mtreset, 1688 [MTFSF] = tape_std_mtfsf, 1689 [MTBSF] = tape_std_mtbsf, 1690 [MTFSR] = tape_std_mtfsr, 1691 [MTBSR] = tape_std_mtbsr, 1692 [MTWEOF] = tape_std_mtweof, 1693 [MTREW] = tape_std_mtrew, 1694 [MTOFFL] = tape_std_mtoffl, 1695 [MTNOP] = tape_std_mtnop, 1696 [MTRETEN] = tape_std_mtreten, 1697 [MTBSFM] = tape_std_mtbsfm, 1698 [MTFSFM] = tape_std_mtfsfm, 1699 [MTEOM] = tape_std_mteom, 1700 [MTERASE] = tape_std_mterase, 1701 [MTRAS1] = NULL, 1702 [MTRAS2] = NULL, 1703 [MTRAS3] = NULL, 1704 [MTSETBLK] = tape_std_mtsetblk, 1705 [MTSETDENSITY] = NULL, 1706 [MTSEEK] = tape_3590_mtseek, 1707 [MTTELL] = tape_3590_mttell, 1708 [MTSETDRVBUFFER] = NULL, 1709 [MTFSS] = NULL, 1710 [MTBSS] = NULL, 1711 [MTWSM] = NULL, 1712 [MTLOCK] = NULL, 1713 [MTUNLOCK] = NULL, 1714 [MTLOAD] = tape_std_mtload, 1715 [MTUNLOAD] = tape_std_mtunload, 1716 [MTCOMPRESSION] = tape_std_mtcompression, 1717 [MTSETPART] = NULL, 1718 [MTMKPART] = NULL 1719 }; 1720 1721 /* 1722 * Tape discipline structure for 3590. 1723 */ 1724 static struct tape_discipline tape_discipline_3590 = { 1725 .owner = THIS_MODULE, 1726 .setup_device = tape_3590_setup_device, 1727 .cleanup_device = tape_3590_cleanup_device, 1728 .process_eov = tape_std_process_eov, 1729 .irq = tape_3590_irq, 1730 .read_block = tape_std_read_block, 1731 .write_block = tape_std_write_block, 1732 #ifdef CONFIG_S390_TAPE_BLOCK 1733 .bread = tape_3590_bread, 1734 .free_bread = tape_3590_free_bread, 1735 .check_locate = tape_3590_check_locate, 1736 #endif 1737 .ioctl_fn = tape_3590_ioctl, 1738 .mtop_array = tape_3590_mtop 1739 }; 1740 1741 static struct ccw_device_id tape_3590_ids[] = { 1742 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, 1743 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, 1744 { /* end of list */ } 1745 }; 1746 1747 static int 1748 tape_3590_online(struct ccw_device *cdev) 1749 { 1750 return tape_generic_online(dev_get_drvdata(&cdev->dev), 1751 &tape_discipline_3590); 1752 } 1753 1754 static struct ccw_driver tape_3590_driver = { 1755 .driver = { 1756 .name = "tape_3590", 1757 .owner = THIS_MODULE, 1758 }, 1759 .ids = tape_3590_ids, 1760 .probe = tape_generic_probe, 1761 .remove = tape_generic_remove, 1762 .set_offline = tape_generic_offline, 1763 .set_online = tape_3590_online, 1764 .freeze = tape_generic_pm_suspend, 1765 }; 1766 1767 /* 1768 * Setup discipline structure. 1769 */ 1770 static int 1771 tape_3590_init(void) 1772 { 1773 int rc; 1774 1775 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); 1776 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); 1777 #ifdef DBF_LIKE_HELL 1778 debug_set_level(TAPE_DBF_AREA, 6); 1779 #endif 1780 1781 DBF_EVENT(3, "3590 init\n"); 1782 1783 tape_3590_wq = alloc_workqueue("tape_3590", 0, 0); 1784 if (!tape_3590_wq) 1785 return -ENOMEM; 1786 1787 /* Register driver for 3590 tapes. */ 1788 rc = ccw_driver_register(&tape_3590_driver); 1789 if (rc) { 1790 destroy_workqueue(tape_3590_wq); 1791 DBF_EVENT(3, "3590 init failed\n"); 1792 } else 1793 DBF_EVENT(3, "3590 registered\n"); 1794 return rc; 1795 } 1796 1797 static void 1798 tape_3590_exit(void) 1799 { 1800 ccw_driver_unregister(&tape_3590_driver); 1801 destroy_workqueue(tape_3590_wq); 1802 debug_unregister(TAPE_DBF_AREA); 1803 } 1804 1805 MODULE_DEVICE_TABLE(ccw, tape_3590_ids); 1806 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); 1807 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); 1808 MODULE_LICENSE("GPL"); 1809 1810 module_init(tape_3590_init); 1811 module_exit(tape_3590_exit); 1812