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 int 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 -ENOSYS; 340 request = tape_alloc_request(2, 72); 341 if (IS_ERR(request)) 342 return PTR_ERR(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 tape_do_io_free(device, request); 358 } 359 360 /* 361 * Disable encryption 362 */ 363 static int tape_3592_disable_crypt(struct tape_device *device) 364 { 365 struct tape_request *request; 366 char *data; 367 368 DBF_EVENT(6, "tape_3592_disable_crypt\n"); 369 if (!crypt_supported(device)) 370 return -ENOSYS; 371 request = tape_alloc_request(2, 72); 372 if (IS_ERR(request)) 373 return PTR_ERR(request); 374 data = request->cpdata; 375 memset(data,0,72); 376 377 data[0] = 0x05; 378 data[36 + 0] = 0x03; 379 data[36 + 1] = 0x03; 380 data[36 + 35] = 0x32; 381 382 request->op = TO_CRYPT_OFF; 383 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 384 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 385 386 return tape_do_io_free(device, request); 387 } 388 389 /* 390 * IOCTL: Set encryption status 391 */ 392 static int tape_3592_ioctl_crypt_set(struct tape_device *device, 393 unsigned long arg) 394 { 395 struct tape390_crypt_info info; 396 397 DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n"); 398 if (!crypt_supported(device)) 399 return -ENOSYS; 400 if (copy_from_user(&info, (char __user *)arg, sizeof(info))) 401 return -EFAULT; 402 if (info.status & ~TAPE390_CRYPT_ON_MASK) 403 return -EINVAL; 404 if (info.status & TAPE390_CRYPT_ON_MASK) 405 return tape_3592_enable_crypt(device); 406 else 407 return tape_3592_disable_crypt(device); 408 } 409 410 static int tape_3590_sense_medium(struct tape_device *device); 411 412 /* 413 * IOCTL: Query enryption status 414 */ 415 static int tape_3592_ioctl_crypt_query(struct tape_device *device, 416 unsigned long arg) 417 { 418 DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n"); 419 if (!crypt_supported(device)) 420 return -ENOSYS; 421 tape_3590_sense_medium(device); 422 if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device), 423 sizeof(TAPE_3590_CRYPT_INFO(device)))) 424 return -EFAULT; 425 else 426 return 0; 427 } 428 429 /* 430 * 3590 IOCTL Overload 431 */ 432 static int 433 tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) 434 { 435 switch (cmd) { 436 case TAPE390_DISPLAY: { 437 struct display_struct disp; 438 439 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp))) 440 return -EFAULT; 441 442 return tape_std_display(device, &disp); 443 } 444 case TAPE390_KEKL_SET: 445 return tape_3592_ioctl_kekl_set(device, arg); 446 case TAPE390_KEKL_QUERY: 447 return tape_3592_ioctl_kekl_query(device, arg); 448 case TAPE390_CRYPT_SET: 449 return tape_3592_ioctl_crypt_set(device, arg); 450 case TAPE390_CRYPT_QUERY: 451 return tape_3592_ioctl_crypt_query(device, arg); 452 default: 453 return -EINVAL; /* no additional ioctls */ 454 } 455 } 456 457 /* 458 * SENSE Medium: Get Sense data about medium state 459 */ 460 static int 461 tape_3590_sense_medium(struct tape_device *device) 462 { 463 struct tape_request *request; 464 465 request = tape_alloc_request(1, 128); 466 if (IS_ERR(request)) 467 return PTR_ERR(request); 468 request->op = TO_MSEN; 469 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); 470 return tape_do_io_free(device, request); 471 } 472 473 /* 474 * MTTELL: Tell block. Return the number of block relative to current file. 475 */ 476 static int 477 tape_3590_mttell(struct tape_device *device, int mt_count) 478 { 479 __u64 block_id; 480 int rc; 481 482 rc = tape_std_read_block_id(device, &block_id); 483 if (rc) 484 return rc; 485 return block_id >> 32; 486 } 487 488 /* 489 * MTSEEK: seek to the specified block. 490 */ 491 static int 492 tape_3590_mtseek(struct tape_device *device, int count) 493 { 494 struct tape_request *request; 495 496 DBF_EVENT(6, "xsee id: %x\n", count); 497 request = tape_alloc_request(3, 4); 498 if (IS_ERR(request)) 499 return PTR_ERR(request); 500 request->op = TO_LBL; 501 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 502 *(__u32 *) request->cpdata = count; 503 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 504 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 505 return tape_do_io_free(device, request); 506 } 507 508 /* 509 * Read Opposite Error Recovery Function: 510 * Used, when Read Forward does not work 511 */ 512 static void 513 tape_3590_read_opposite(struct tape_device *device, 514 struct tape_request *request) 515 { 516 struct tape_3590_disc_data *data; 517 518 /* 519 * We have allocated 4 ccws in tape_std_read, so we can now 520 * transform the request to a read backward, followed by a 521 * forward space block. 522 */ 523 request->op = TO_RBA; 524 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 525 data = device->discdata; 526 tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op, 527 device->char_data.idal_buf); 528 tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); 529 tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); 530 DBF_EVENT(6, "xrop ccwg\n"); 531 } 532 533 /* 534 * Read Attention Msg 535 * This should be done after an interrupt with attention bit (0x80) 536 * in device state. 537 * 538 * After a "read attention message" request there are two possible 539 * results: 540 * 541 * 1. A unit check is presented, when attention sense is present (e.g. when 542 * a medium has been unloaded). The attention sense comes then 543 * together with the unit check. The recovery action is either "retry" 544 * (in case there is an attention message pending) or "permanent error". 545 * 546 * 2. The attention msg is written to the "read subsystem data" buffer. 547 * In this case we probably should print it to the console. 548 */ 549 static int 550 tape_3590_read_attmsg(struct tape_device *device) 551 { 552 struct tape_request *request; 553 char *buf; 554 555 request = tape_alloc_request(3, 4096); 556 if (IS_ERR(request)) 557 return PTR_ERR(request); 558 request->op = TO_READ_ATTMSG; 559 buf = request->cpdata; 560 buf[0] = PREP_RD_SS_DATA; 561 buf[6] = RD_ATTMSG; /* read att msg */ 562 tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf); 563 tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12); 564 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 565 return tape_do_io_free(device, request); 566 } 567 568 /* 569 * These functions are used to schedule follow-up actions from within an 570 * interrupt context (like unsolicited interrupts). 571 */ 572 struct work_handler_data { 573 struct tape_device *device; 574 enum tape_op op; 575 struct work_struct work; 576 }; 577 578 static void 579 tape_3590_work_handler(struct work_struct *work) 580 { 581 struct work_handler_data *p = 582 container_of(work, struct work_handler_data, work); 583 584 switch (p->op) { 585 case TO_MSEN: 586 tape_3590_sense_medium(p->device); 587 break; 588 case TO_READ_ATTMSG: 589 tape_3590_read_attmsg(p->device); 590 break; 591 case TO_CRYPT_ON: 592 tape_3592_enable_crypt(p->device); 593 break; 594 case TO_CRYPT_OFF: 595 tape_3592_disable_crypt(p->device); 596 break; 597 default: 598 DBF_EVENT(3, "T3590: work handler undefined for " 599 "operation 0x%02x\n", p->op); 600 } 601 tape_put_device(p->device); 602 kfree(p); 603 } 604 605 static int 606 tape_3590_schedule_work(struct tape_device *device, enum tape_op op) 607 { 608 struct work_handler_data *p; 609 610 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) 611 return -ENOMEM; 612 613 INIT_WORK(&p->work, tape_3590_work_handler); 614 615 p->device = tape_get_device(device); 616 p->op = op; 617 618 queue_work(tape_3590_wq, &p->work); 619 return 0; 620 } 621 622 #ifdef CONFIG_S390_TAPE_BLOCK 623 /* 624 * Tape Block READ 625 */ 626 static struct tape_request * 627 tape_3590_bread(struct tape_device *device, struct request *req) 628 { 629 struct tape_request *request; 630 struct ccw1 *ccw; 631 int count = 0, start_block; 632 unsigned off; 633 char *dst; 634 struct bio_vec *bv; 635 struct req_iterator iter; 636 637 DBF_EVENT(6, "xBREDid:"); 638 start_block = blk_rq_pos(req) >> TAPEBLOCK_HSEC_S2B; 639 DBF_EVENT(6, "start_block = %i\n", start_block); 640 641 rq_for_each_segment(bv, req, iter) 642 count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9); 643 644 request = tape_alloc_request(2 + count + 1, 4); 645 if (IS_ERR(request)) 646 return request; 647 request->op = TO_BLOCK; 648 *(__u32 *) request->cpdata = start_block; 649 ccw = request->cpaddr; 650 ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte); 651 652 /* 653 * We always setup a nop after the mode set ccw. This slot is 654 * used in tape_std_check_locate to insert a locate ccw if the 655 * current tape position doesn't match the start block to be read. 656 */ 657 ccw = tape_ccw_cc(ccw, NOP, 0, NULL); 658 659 rq_for_each_segment(bv, req, iter) { 660 dst = page_address(bv->bv_page) + bv->bv_offset; 661 for (off = 0; off < bv->bv_len; off += TAPEBLOCK_HSEC_SIZE) { 662 ccw->flags = CCW_FLAG_CC; 663 ccw->cmd_code = READ_FORWARD; 664 ccw->count = TAPEBLOCK_HSEC_SIZE; 665 set_normalized_cda(ccw, (void *) __pa(dst)); 666 ccw++; 667 dst += TAPEBLOCK_HSEC_SIZE; 668 } 669 BUG_ON(off > bv->bv_len); 670 } 671 ccw = tape_ccw_end(ccw, NOP, 0, NULL); 672 DBF_EVENT(6, "xBREDccwg\n"); 673 return request; 674 } 675 676 static void 677 tape_3590_free_bread(struct tape_request *request) 678 { 679 struct ccw1 *ccw; 680 681 /* Last ccw is a nop and doesn't need clear_normalized_cda */ 682 for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++) 683 if (ccw->cmd_code == READ_FORWARD) 684 clear_normalized_cda(ccw); 685 tape_free_request(request); 686 } 687 688 /* 689 * check_locate is called just before the tape request is passed to 690 * the common io layer for execution. It has to check the current 691 * tape position and insert a locate ccw if it doesn't match the 692 * start block for the request. 693 */ 694 static void 695 tape_3590_check_locate(struct tape_device *device, struct tape_request *request) 696 { 697 __u32 *start_block; 698 699 start_block = (__u32 *) request->cpdata; 700 if (*start_block != device->blk_data.block_position) { 701 /* Add the start offset of the file to get the real block. */ 702 *start_block += device->bof; 703 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 704 } 705 } 706 #endif 707 708 static void tape_3590_med_state_set(struct tape_device *device, 709 struct tape_3590_med_sense *sense) 710 { 711 struct tape390_crypt_info *c_info; 712 713 c_info = &TAPE_3590_CRYPT_INFO(device); 714 715 DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst); 716 switch (sense->macst) { 717 case 0x04: 718 case 0x05: 719 case 0x06: 720 tape_med_state_set(device, MS_UNLOADED); 721 TAPE_3590_CRYPT_INFO(device).medium_status = 0; 722 return; 723 case 0x08: 724 case 0x09: 725 tape_med_state_set(device, MS_LOADED); 726 break; 727 default: 728 tape_med_state_set(device, MS_UNKNOWN); 729 return; 730 } 731 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; 732 if (sense->flags & MSENSE_CRYPT_MASK) { 733 DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags); 734 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK; 735 } else { 736 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags); 737 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK; 738 } 739 } 740 741 /* 742 * The done handler is called at device/channel end and wakes up the sleeping 743 * process 744 */ 745 static int 746 tape_3590_done(struct tape_device *device, struct tape_request *request) 747 { 748 struct tape_3590_disc_data *disc_data; 749 750 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); 751 disc_data = device->discdata; 752 753 switch (request->op) { 754 case TO_BSB: 755 case TO_BSF: 756 case TO_DSE: 757 case TO_FSB: 758 case TO_FSF: 759 case TO_LBL: 760 case TO_RFO: 761 case TO_RBA: 762 case TO_REW: 763 case TO_WRI: 764 case TO_WTM: 765 case TO_BLOCK: 766 case TO_LOAD: 767 tape_med_state_set(device, MS_LOADED); 768 break; 769 case TO_RUN: 770 tape_med_state_set(device, MS_UNLOADED); 771 tape_3590_schedule_work(device, TO_CRYPT_OFF); 772 break; 773 case TO_MSEN: 774 tape_3590_med_state_set(device, request->cpdata); 775 break; 776 case TO_CRYPT_ON: 777 TAPE_3590_CRYPT_INFO(device).status 778 |= TAPE390_CRYPT_ON_MASK; 779 *(device->modeset_byte) |= 0x03; 780 break; 781 case TO_CRYPT_OFF: 782 TAPE_3590_CRYPT_INFO(device).status 783 &= ~TAPE390_CRYPT_ON_MASK; 784 *(device->modeset_byte) &= ~0x03; 785 break; 786 case TO_RBI: /* RBI seems to succeed even without medium loaded. */ 787 case TO_NOP: /* Same to NOP. */ 788 case TO_READ_CONFIG: 789 case TO_READ_ATTMSG: 790 case TO_DIS: 791 case TO_ASSIGN: 792 case TO_UNASSIGN: 793 case TO_SIZE: 794 case TO_KEKL_SET: 795 case TO_KEKL_QUERY: 796 case TO_RDC: 797 break; 798 } 799 return TAPE_IO_SUCCESS; 800 } 801 802 /* 803 * This function is called, when error recovery was successful 804 */ 805 static inline int 806 tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) 807 { 808 DBF_EVENT(3, "Error Recovery successful for %s\n", 809 tape_op_verbose[request->op]); 810 return tape_3590_done(device, request); 811 } 812 813 /* 814 * This function is called, when error recovery was not successful 815 */ 816 static inline int 817 tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, 818 struct irb *irb, int rc) 819 { 820 DBF_EVENT(3, "Error Recovery failed for %s\n", 821 tape_op_verbose[request->op]); 822 tape_dump_sense_dbf(device, request, irb); 823 return rc; 824 } 825 826 /* 827 * Error Recovery do retry 828 */ 829 static inline int 830 tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, 831 struct irb *irb) 832 { 833 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); 834 tape_dump_sense_dbf(device, request, irb); 835 return TAPE_IO_RETRY; 836 } 837 838 /* 839 * Handle unsolicited interrupts 840 */ 841 static int 842 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) 843 { 844 if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END) 845 /* Probably result of halt ssch */ 846 return TAPE_IO_PENDING; 847 else if (irb->scsw.cmd.dstat == 0x85) 848 /* Device Ready */ 849 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); 850 else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 851 tape_3590_schedule_work(device, TO_READ_ATTMSG); 852 } else { 853 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); 854 tape_dump_sense_dbf(device, NULL, irb); 855 } 856 /* check medium state */ 857 tape_3590_schedule_work(device, TO_MSEN); 858 return TAPE_IO_SUCCESS; 859 } 860 861 /* 862 * Basic Recovery routine 863 */ 864 static int 865 tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, 866 struct irb *irb, int rc) 867 { 868 struct tape_3590_sense *sense; 869 870 sense = (struct tape_3590_sense *) irb->ecw; 871 872 switch (sense->bra) { 873 case SENSE_BRA_PER: 874 return tape_3590_erp_failed(device, request, irb, rc); 875 case SENSE_BRA_CONT: 876 return tape_3590_erp_succeded(device, request); 877 case SENSE_BRA_RE: 878 return tape_3590_erp_retry(device, request, irb); 879 case SENSE_BRA_DRE: 880 return tape_3590_erp_failed(device, request, irb, rc); 881 default: 882 BUG(); 883 return TAPE_IO_STOP; 884 } 885 } 886 887 /* 888 * RDL: Read Device (buffered) log 889 */ 890 static int 891 tape_3590_erp_read_buf_log(struct tape_device *device, 892 struct tape_request *request, struct irb *irb) 893 { 894 /* 895 * We just do the basic error recovery at the moment (retry). 896 * Perhaps in the future, we read the log and dump it somewhere... 897 */ 898 return tape_3590_erp_basic(device, request, irb, -EIO); 899 } 900 901 /* 902 * SWAP: Swap Devices 903 */ 904 static int 905 tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, 906 struct irb *irb) 907 { 908 /* 909 * This error recovery should swap the tapes 910 * if the original has a problem. The operation 911 * should proceed with the new tape... this 912 * should probably be done in user space! 913 */ 914 dev_warn (&device->cdev->dev, "The tape medium must be loaded into a " 915 "different tape unit\n"); 916 return tape_3590_erp_basic(device, request, irb, -EIO); 917 } 918 919 /* 920 * LBY: Long Busy 921 */ 922 static int 923 tape_3590_erp_long_busy(struct tape_device *device, 924 struct tape_request *request, struct irb *irb) 925 { 926 DBF_EVENT(6, "Device is busy\n"); 927 return TAPE_IO_LONG_BUSY; 928 } 929 930 /* 931 * SPI: Special Intercept 932 */ 933 static int 934 tape_3590_erp_special_interrupt(struct tape_device *device, 935 struct tape_request *request, struct irb *irb) 936 { 937 return tape_3590_erp_basic(device, request, irb, -EIO); 938 } 939 940 /* 941 * RDA: Read Alternate 942 */ 943 static int 944 tape_3590_erp_read_alternate(struct tape_device *device, 945 struct tape_request *request, struct irb *irb) 946 { 947 struct tape_3590_disc_data *data; 948 949 /* 950 * The issued Read Backward or Read Previous command is not 951 * supported by the device 952 * The recovery action should be to issue another command: 953 * Read Revious: if Read Backward is not supported 954 * Read Backward: if Read Previous is not supported 955 */ 956 data = device->discdata; 957 if (data->read_back_op == READ_PREVIOUS) { 958 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", 959 device->cdev_id); 960 data->read_back_op = READ_BACKWARD; 961 } else { 962 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", 963 device->cdev_id); 964 data->read_back_op = READ_PREVIOUS; 965 } 966 tape_3590_read_opposite(device, request); 967 return tape_3590_erp_retry(device, request, irb); 968 } 969 970 /* 971 * Error Recovery read opposite 972 */ 973 static int 974 tape_3590_erp_read_opposite(struct tape_device *device, 975 struct tape_request *request, struct irb *irb) 976 { 977 switch (request->op) { 978 case TO_RFO: 979 /* 980 * We did read forward, but the data could not be read. 981 * We will read backward and then skip forward again. 982 */ 983 tape_3590_read_opposite(device, request); 984 return tape_3590_erp_retry(device, request, irb); 985 case TO_RBA: 986 /* We tried to read forward and backward, but hat no success */ 987 return tape_3590_erp_failed(device, request, irb, -EIO); 988 break; 989 default: 990 return tape_3590_erp_failed(device, request, irb, -EIO); 991 } 992 } 993 994 /* 995 * Print an MIM (Media Information Message) (message code f0) 996 */ 997 static void 998 tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) 999 { 1000 struct tape_3590_sense *sense; 1001 char *exception, *service; 1002 1003 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1004 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1005 1006 if (!exception || !service) 1007 goto out_nomem; 1008 1009 sense = (struct tape_3590_sense *) irb->ecw; 1010 /* Exception Message */ 1011 switch (sense->fmt.f70.emc) { 1012 case 0x02: 1013 snprintf(exception, BUFSIZE, "Data degraded"); 1014 break; 1015 case 0x03: 1016 snprintf(exception, BUFSIZE, "Data degraded in partion %i", 1017 sense->fmt.f70.mp); 1018 break; 1019 case 0x04: 1020 snprintf(exception, BUFSIZE, "Medium degraded"); 1021 break; 1022 case 0x05: 1023 snprintf(exception, BUFSIZE, "Medium degraded in partition %i", 1024 sense->fmt.f70.mp); 1025 break; 1026 case 0x06: 1027 snprintf(exception, BUFSIZE, "Block 0 Error"); 1028 break; 1029 case 0x07: 1030 snprintf(exception, BUFSIZE, "Medium Exception 0x%02x", 1031 sense->fmt.f70.md); 1032 break; 1033 default: 1034 snprintf(exception, BUFSIZE, "0x%02x", 1035 sense->fmt.f70.emc); 1036 break; 1037 } 1038 /* Service Message */ 1039 switch (sense->fmt.f70.smc) { 1040 case 0x02: 1041 snprintf(service, BUFSIZE, "Reference Media maintenance " 1042 "procedure %i", sense->fmt.f70.md); 1043 break; 1044 default: 1045 snprintf(service, BUFSIZE, "0x%02x", 1046 sense->fmt.f70.smc); 1047 break; 1048 } 1049 1050 dev_warn (&device->cdev->dev, "Tape media information: exception %s, " 1051 "service %s\n", exception, service); 1052 1053 out_nomem: 1054 kfree(exception); 1055 kfree(service); 1056 } 1057 1058 /* 1059 * Print an I/O Subsystem Service Information Message (message code f1) 1060 */ 1061 static void 1062 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) 1063 { 1064 struct tape_3590_sense *sense; 1065 char *exception, *service; 1066 1067 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1068 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1069 1070 if (!exception || !service) 1071 goto out_nomem; 1072 1073 sense = (struct tape_3590_sense *) irb->ecw; 1074 /* Exception Message */ 1075 switch (sense->fmt.f71.emc) { 1076 case 0x01: 1077 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1078 break; 1079 case 0x02: 1080 snprintf(exception, BUFSIZE, "CU Exception - no performance " 1081 "impact"); 1082 break; 1083 case 0x03: 1084 snprintf(exception, BUFSIZE, "CU Exception on channel " 1085 "interface 0x%02x", sense->fmt.f71.md[0]); 1086 break; 1087 case 0x04: 1088 snprintf(exception, BUFSIZE, "CU Exception on device path " 1089 "0x%02x", sense->fmt.f71.md[0]); 1090 break; 1091 case 0x05: 1092 snprintf(exception, BUFSIZE, "CU Exception on library path " 1093 "0x%02x", sense->fmt.f71.md[0]); 1094 break; 1095 case 0x06: 1096 snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x", 1097 sense->fmt.f71.md[0]); 1098 break; 1099 case 0x07: 1100 snprintf(exception, BUFSIZE, "CU Exception on partition " 1101 "0x%02x", sense->fmt.f71.md[0]); 1102 break; 1103 default: 1104 snprintf(exception, BUFSIZE, "0x%02x", 1105 sense->fmt.f71.emc); 1106 } 1107 /* Service Message */ 1108 switch (sense->fmt.f71.smc) { 1109 case 0x01: 1110 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1111 break; 1112 case 0x02: 1113 snprintf(service, BUFSIZE, "Repair will not impact cu " 1114 "performance"); 1115 break; 1116 case 0x03: 1117 if (sense->fmt.f71.mdf == 0) 1118 snprintf(service, BUFSIZE, "Repair will disable node " 1119 "0x%x on CU", sense->fmt.f71.md[1]); 1120 else 1121 snprintf(service, BUFSIZE, "Repair will disable " 1122 "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1], 1123 sense->fmt.f71.md[2]); 1124 break; 1125 case 0x04: 1126 if (sense->fmt.f71.mdf == 0) 1127 snprintf(service, BUFSIZE, "Repair will disable " 1128 "channel path 0x%x on CU", 1129 sense->fmt.f71.md[1]); 1130 else 1131 snprintf(service, BUFSIZE, "Repair will disable cannel" 1132 " paths (0x%x-0x%x) on CU", 1133 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1134 break; 1135 case 0x05: 1136 if (sense->fmt.f71.mdf == 0) 1137 snprintf(service, BUFSIZE, "Repair will disable device" 1138 " path 0x%x on CU", sense->fmt.f71.md[1]); 1139 else 1140 snprintf(service, BUFSIZE, "Repair will disable device" 1141 " paths (0x%x-0x%x) on CU", 1142 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1143 break; 1144 case 0x06: 1145 if (sense->fmt.f71.mdf == 0) 1146 snprintf(service, BUFSIZE, "Repair will disable " 1147 "library path 0x%x on CU", 1148 sense->fmt.f71.md[1]); 1149 else 1150 snprintf(service, BUFSIZE, "Repair will disable " 1151 "library paths (0x%x-0x%x) on CU", 1152 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1153 break; 1154 case 0x07: 1155 snprintf(service, BUFSIZE, "Repair will disable access to CU"); 1156 break; 1157 default: 1158 snprintf(service, BUFSIZE, "0x%02x", 1159 sense->fmt.f71.smc); 1160 } 1161 1162 dev_warn (&device->cdev->dev, "I/O subsystem information: exception" 1163 " %s, service %s\n", exception, service); 1164 out_nomem: 1165 kfree(exception); 1166 kfree(service); 1167 } 1168 1169 /* 1170 * Print an Device Subsystem Service Information Message (message code f2) 1171 */ 1172 static void 1173 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) 1174 { 1175 struct tape_3590_sense *sense; 1176 char *exception, *service; 1177 1178 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1179 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1180 1181 if (!exception || !service) 1182 goto out_nomem; 1183 1184 sense = (struct tape_3590_sense *) irb->ecw; 1185 /* Exception Message */ 1186 switch (sense->fmt.f71.emc) { 1187 case 0x01: 1188 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1189 break; 1190 case 0x02: 1191 snprintf(exception, BUFSIZE, "DV Exception - no performance" 1192 " impact"); 1193 break; 1194 case 0x03: 1195 snprintf(exception, BUFSIZE, "DV Exception on channel " 1196 "interface 0x%02x", sense->fmt.f71.md[0]); 1197 break; 1198 case 0x04: 1199 snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x", 1200 sense->fmt.f71.md[0]); 1201 break; 1202 case 0x05: 1203 snprintf(exception, BUFSIZE, "DV Exception on message display" 1204 " 0x%02x", sense->fmt.f71.md[0]); 1205 break; 1206 case 0x06: 1207 snprintf(exception, BUFSIZE, "DV Exception in tape path"); 1208 break; 1209 case 0x07: 1210 snprintf(exception, BUFSIZE, "DV Exception in drive"); 1211 break; 1212 default: 1213 snprintf(exception, BUFSIZE, "0x%02x", 1214 sense->fmt.f71.emc); 1215 } 1216 /* Service Message */ 1217 switch (sense->fmt.f71.smc) { 1218 case 0x01: 1219 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1220 break; 1221 case 0x02: 1222 snprintf(service, BUFSIZE, "Repair will not impact device " 1223 "performance"); 1224 break; 1225 case 0x03: 1226 if (sense->fmt.f71.mdf == 0) 1227 snprintf(service, BUFSIZE, "Repair will disable " 1228 "channel path 0x%x on DV", 1229 sense->fmt.f71.md[1]); 1230 else 1231 snprintf(service, BUFSIZE, "Repair will disable " 1232 "channel path (0x%x-0x%x) on DV", 1233 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1234 break; 1235 case 0x04: 1236 if (sense->fmt.f71.mdf == 0) 1237 snprintf(service, BUFSIZE, "Repair will disable " 1238 "interface 0x%x on DV", sense->fmt.f71.md[1]); 1239 else 1240 snprintf(service, BUFSIZE, "Repair will disable " 1241 "interfaces (0x%x-0x%x) on DV", 1242 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1243 break; 1244 case 0x05: 1245 if (sense->fmt.f71.mdf == 0) 1246 snprintf(service, BUFSIZE, "Repair will disable loader" 1247 " 0x%x on DV", sense->fmt.f71.md[1]); 1248 else 1249 snprintf(service, BUFSIZE, "Repair will disable loader" 1250 " (0x%x-0x%x) on DV", 1251 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1252 break; 1253 case 0x07: 1254 snprintf(service, BUFSIZE, "Repair will disable access to DV"); 1255 break; 1256 case 0x08: 1257 if (sense->fmt.f71.mdf == 0) 1258 snprintf(service, BUFSIZE, "Repair will disable " 1259 "message display 0x%x on DV", 1260 sense->fmt.f71.md[1]); 1261 else 1262 snprintf(service, BUFSIZE, "Repair will disable " 1263 "message displays (0x%x-0x%x) on DV", 1264 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1265 break; 1266 case 0x09: 1267 snprintf(service, BUFSIZE, "Clean DV"); 1268 break; 1269 default: 1270 snprintf(service, BUFSIZE, "0x%02x", 1271 sense->fmt.f71.smc); 1272 } 1273 1274 dev_warn (&device->cdev->dev, "Device subsystem information: exception" 1275 " %s, service %s\n", exception, service); 1276 out_nomem: 1277 kfree(exception); 1278 kfree(service); 1279 } 1280 1281 /* 1282 * Print standard ERA Message 1283 */ 1284 static void 1285 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) 1286 { 1287 struct tape_3590_sense *sense; 1288 1289 sense = (struct tape_3590_sense *) irb->ecw; 1290 if (sense->mc == 0) 1291 return; 1292 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { 1293 if (tape_3590_msg[sense->mc] != NULL) 1294 dev_warn (&device->cdev->dev, "The tape unit has " 1295 "issued sense message %s\n", 1296 tape_3590_msg[sense->mc]); 1297 else 1298 dev_warn (&device->cdev->dev, "The tape unit has " 1299 "issued an unknown sense message code 0x%x\n", 1300 sense->mc); 1301 return; 1302 } 1303 if (sense->mc == 0xf0) { 1304 /* Standard Media Information Message */ 1305 dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, " 1306 "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc, 1307 sense->fmt.f70.emc, sense->fmt.f70.smc, 1308 sense->fmt.f70.refcode, sense->fmt.f70.mid, 1309 sense->fmt.f70.fid); 1310 tape_3590_print_mim_msg_f0(device, irb); 1311 return; 1312 } 1313 if (sense->mc == 0xf1) { 1314 /* Standard I/O Subsystem Service Information Message */ 1315 dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x," 1316 " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1317 sense->fmt.f71.sev, device->cdev->id.dev_model, 1318 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1319 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1320 sense->fmt.f71.refcode3); 1321 tape_3590_print_io_sim_msg_f1(device, irb); 1322 return; 1323 } 1324 if (sense->mc == 0xf2) { 1325 /* Standard Device Service Information Message */ 1326 dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x" 1327 ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1328 sense->fmt.f71.sev, device->cdev->id.dev_model, 1329 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1330 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1331 sense->fmt.f71.refcode3); 1332 tape_3590_print_dev_sim_msg_f2(device, irb); 1333 return; 1334 } 1335 if (sense->mc == 0xf3) { 1336 /* Standard Library Service Information Message */ 1337 return; 1338 } 1339 dev_warn (&device->cdev->dev, "The tape unit has issued an unknown " 1340 "sense message code %x\n", sense->mc); 1341 } 1342 1343 static int tape_3590_crypt_error(struct tape_device *device, 1344 struct tape_request *request, struct irb *irb) 1345 { 1346 u8 cu_rc, ekm_rc1; 1347 u16 ekm_rc2; 1348 u32 drv_rc; 1349 const char *bus_id; 1350 char *sense; 1351 1352 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; 1353 bus_id = dev_name(&device->cdev->dev); 1354 cu_rc = sense[0]; 1355 drv_rc = *((u32*) &sense[5]) & 0xffffff; 1356 ekm_rc1 = sense[9]; 1357 ekm_rc2 = *((u16*) &sense[10]); 1358 if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) 1359 /* key not defined on EKM */ 1360 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); 1361 if ((cu_rc == 1) || (cu_rc == 2)) 1362 /* No connection to EKM */ 1363 return tape_3590_erp_basic(device, request, irb, -ENOTCONN); 1364 1365 dev_err (&device->cdev->dev, "The tape unit failed to obtain the " 1366 "encryption key from EKM\n"); 1367 1368 return tape_3590_erp_basic(device, request, irb, -ENOKEY); 1369 } 1370 1371 /* 1372 * 3590 error Recovery routine: 1373 * If possible, it tries to recover from the error. If this is not possible, 1374 * inform the user about the problem. 1375 */ 1376 static int 1377 tape_3590_unit_check(struct tape_device *device, struct tape_request *request, 1378 struct irb *irb) 1379 { 1380 struct tape_3590_sense *sense; 1381 int rc; 1382 1383 #ifdef CONFIG_S390_TAPE_BLOCK 1384 if (request->op == TO_BLOCK) { 1385 /* 1386 * Recovery for block device requests. Set the block_position 1387 * to something invalid and retry. 1388 */ 1389 device->blk_data.block_position = -1; 1390 if (request->retries-- <= 0) 1391 return tape_3590_erp_failed(device, request, irb, -EIO); 1392 else 1393 return tape_3590_erp_retry(device, request, irb); 1394 } 1395 #endif 1396 1397 sense = (struct tape_3590_sense *) irb->ecw; 1398 1399 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); 1400 1401 /* 1402 * First check all RC-QRCs where we want to do something special 1403 * - "break": basic error recovery is done 1404 * - "goto out:": just print error message if available 1405 */ 1406 rc = -EIO; 1407 switch (sense->rc_rqc) { 1408 1409 case 0x1110: 1410 tape_3590_print_era_msg(device, irb); 1411 return tape_3590_erp_read_buf_log(device, request, irb); 1412 1413 case 0x2011: 1414 tape_3590_print_era_msg(device, irb); 1415 return tape_3590_erp_read_alternate(device, request, irb); 1416 1417 case 0x2230: 1418 case 0x2231: 1419 tape_3590_print_era_msg(device, irb); 1420 return tape_3590_erp_special_interrupt(device, request, irb); 1421 case 0x2240: 1422 return tape_3590_crypt_error(device, request, irb); 1423 1424 case 0x3010: 1425 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", 1426 device->cdev_id); 1427 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1428 case 0x3012: 1429 DBF_EVENT(2, "(%08x): Forward at End of Partition\n", 1430 device->cdev_id); 1431 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1432 case 0x3020: 1433 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); 1434 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1435 1436 case 0x3122: 1437 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", 1438 device->cdev_id); 1439 return tape_3590_erp_basic(device, request, irb, -EIO); 1440 case 0x3123: 1441 DBF_EVENT(2, "(%08x): Rewind Unload complete\n", 1442 device->cdev_id); 1443 tape_med_state_set(device, MS_UNLOADED); 1444 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1445 return tape_3590_erp_basic(device, request, irb, 0); 1446 1447 case 0x4010: 1448 /* 1449 * print additional msg since default msg 1450 * "device intervention" is not very meaningfull 1451 */ 1452 tape_med_state_set(device, MS_UNLOADED); 1453 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1454 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1455 case 0x4012: /* Device Long Busy */ 1456 /* XXX: Also use long busy handling here? */ 1457 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); 1458 tape_3590_print_era_msg(device, irb); 1459 return tape_3590_erp_basic(device, request, irb, -EBUSY); 1460 case 0x4014: 1461 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); 1462 return tape_3590_erp_long_busy(device, request, irb); 1463 1464 case 0x5010: 1465 if (sense->rac == 0xd0) { 1466 /* Swap */ 1467 tape_3590_print_era_msg(device, irb); 1468 return tape_3590_erp_swap(device, request, irb); 1469 } 1470 if (sense->rac == 0x26) { 1471 /* Read Opposite */ 1472 tape_3590_print_era_msg(device, irb); 1473 return tape_3590_erp_read_opposite(device, request, 1474 irb); 1475 } 1476 return tape_3590_erp_basic(device, request, irb, -EIO); 1477 case 0x5020: 1478 case 0x5021: 1479 case 0x5022: 1480 case 0x5040: 1481 case 0x5041: 1482 case 0x5042: 1483 tape_3590_print_era_msg(device, irb); 1484 return tape_3590_erp_swap(device, request, irb); 1485 1486 case 0x5110: 1487 case 0x5111: 1488 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1489 1490 case 0x5120: 1491 case 0x1120: 1492 tape_med_state_set(device, MS_UNLOADED); 1493 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1494 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1495 1496 case 0x6020: 1497 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1498 1499 case 0x8011: 1500 return tape_3590_erp_basic(device, request, irb, -EPERM); 1501 case 0x8013: 1502 dev_warn (&device->cdev->dev, "A different host has privileged" 1503 " access to the tape unit\n"); 1504 return tape_3590_erp_basic(device, request, irb, -EPERM); 1505 default: 1506 return tape_3590_erp_basic(device, request, irb, -EIO); 1507 } 1508 } 1509 1510 /* 1511 * 3590 interrupt handler: 1512 */ 1513 static int 1514 tape_3590_irq(struct tape_device *device, struct tape_request *request, 1515 struct irb *irb) 1516 { 1517 if (request == NULL) 1518 return tape_3590_unsolicited_irq(device, irb); 1519 1520 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && 1521 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && 1522 (request->op == TO_WRI)) { 1523 /* Write at end of volume */ 1524 DBF_EVENT(2, "End of volume\n"); 1525 return tape_3590_erp_failed(device, request, irb, -ENOSPC); 1526 } 1527 1528 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) 1529 return tape_3590_unit_check(device, request, irb); 1530 1531 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { 1532 if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) { 1533 if (request->op == TO_FSB || request->op == TO_BSB) 1534 request->rescnt++; 1535 else 1536 DBF_EVENT(5, "Unit Exception!\n"); 1537 } 1538 1539 return tape_3590_done(device, request); 1540 } 1541 1542 if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) { 1543 DBF_EVENT(2, "cannel end\n"); 1544 return TAPE_IO_PENDING; 1545 } 1546 1547 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 1548 DBF_EVENT(2, "Unit Attention when busy..\n"); 1549 return TAPE_IO_PENDING; 1550 } 1551 1552 DBF_EVENT(6, "xunknownirq\n"); 1553 tape_dump_sense_dbf(device, request, irb); 1554 return TAPE_IO_STOP; 1555 } 1556 1557 1558 static int tape_3590_read_dev_chars(struct tape_device *device, 1559 struct tape_3590_rdc_data *rdc_data) 1560 { 1561 int rc; 1562 struct tape_request *request; 1563 1564 request = tape_alloc_request(1, sizeof(*rdc_data)); 1565 if (IS_ERR(request)) 1566 return PTR_ERR(request); 1567 request->op = TO_RDC; 1568 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), 1569 request->cpdata); 1570 rc = tape_do_io(device, request); 1571 if (rc == 0) 1572 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); 1573 tape_free_request(request); 1574 return rc; 1575 } 1576 1577 /* 1578 * Setup device function 1579 */ 1580 static int 1581 tape_3590_setup_device(struct tape_device *device) 1582 { 1583 int rc; 1584 struct tape_3590_disc_data *data; 1585 struct tape_3590_rdc_data *rdc_data; 1586 1587 DBF_EVENT(6, "3590 device setup\n"); 1588 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); 1589 if (data == NULL) 1590 return -ENOMEM; 1591 data->read_back_op = READ_PREVIOUS; 1592 device->discdata = data; 1593 1594 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); 1595 if (!rdc_data) { 1596 rc = -ENOMEM; 1597 goto fail_kmalloc; 1598 } 1599 rc = tape_3590_read_dev_chars(device, rdc_data); 1600 if (rc) { 1601 DBF_LH(3, "Read device characteristics failed!\n"); 1602 goto fail_rdc_data; 1603 } 1604 rc = tape_std_assign(device); 1605 if (rc) 1606 goto fail_rdc_data; 1607 if (rdc_data->data[31] == 0x13) { 1608 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; 1609 tape_3592_disable_crypt(device); 1610 } else { 1611 DBF_EVENT(6, "Device has NO crypto support\n"); 1612 } 1613 /* Try to find out if medium is loaded */ 1614 rc = tape_3590_sense_medium(device); 1615 if (rc) { 1616 DBF_LH(3, "3590 medium sense returned %d\n", rc); 1617 goto fail_rdc_data; 1618 } 1619 return 0; 1620 1621 fail_rdc_data: 1622 kfree(rdc_data); 1623 fail_kmalloc: 1624 kfree(data); 1625 return rc; 1626 } 1627 1628 /* 1629 * Cleanup device function 1630 */ 1631 static void 1632 tape_3590_cleanup_device(struct tape_device *device) 1633 { 1634 flush_workqueue(tape_3590_wq); 1635 tape_std_unassign(device); 1636 1637 kfree(device->discdata); 1638 device->discdata = NULL; 1639 } 1640 1641 /* 1642 * List of 3590 magnetic tape commands. 1643 */ 1644 static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { 1645 [MTRESET] = tape_std_mtreset, 1646 [MTFSF] = tape_std_mtfsf, 1647 [MTBSF] = tape_std_mtbsf, 1648 [MTFSR] = tape_std_mtfsr, 1649 [MTBSR] = tape_std_mtbsr, 1650 [MTWEOF] = tape_std_mtweof, 1651 [MTREW] = tape_std_mtrew, 1652 [MTOFFL] = tape_std_mtoffl, 1653 [MTNOP] = tape_std_mtnop, 1654 [MTRETEN] = tape_std_mtreten, 1655 [MTBSFM] = tape_std_mtbsfm, 1656 [MTFSFM] = tape_std_mtfsfm, 1657 [MTEOM] = tape_std_mteom, 1658 [MTERASE] = tape_std_mterase, 1659 [MTRAS1] = NULL, 1660 [MTRAS2] = NULL, 1661 [MTRAS3] = NULL, 1662 [MTSETBLK] = tape_std_mtsetblk, 1663 [MTSETDENSITY] = NULL, 1664 [MTSEEK] = tape_3590_mtseek, 1665 [MTTELL] = tape_3590_mttell, 1666 [MTSETDRVBUFFER] = NULL, 1667 [MTFSS] = NULL, 1668 [MTBSS] = NULL, 1669 [MTWSM] = NULL, 1670 [MTLOCK] = NULL, 1671 [MTUNLOCK] = NULL, 1672 [MTLOAD] = tape_std_mtload, 1673 [MTUNLOAD] = tape_std_mtunload, 1674 [MTCOMPRESSION] = tape_std_mtcompression, 1675 [MTSETPART] = NULL, 1676 [MTMKPART] = NULL 1677 }; 1678 1679 /* 1680 * Tape discipline structure for 3590. 1681 */ 1682 static struct tape_discipline tape_discipline_3590 = { 1683 .owner = THIS_MODULE, 1684 .setup_device = tape_3590_setup_device, 1685 .cleanup_device = tape_3590_cleanup_device, 1686 .process_eov = tape_std_process_eov, 1687 .irq = tape_3590_irq, 1688 .read_block = tape_std_read_block, 1689 .write_block = tape_std_write_block, 1690 #ifdef CONFIG_S390_TAPE_BLOCK 1691 .bread = tape_3590_bread, 1692 .free_bread = tape_3590_free_bread, 1693 .check_locate = tape_3590_check_locate, 1694 #endif 1695 .ioctl_fn = tape_3590_ioctl, 1696 .mtop_array = tape_3590_mtop 1697 }; 1698 1699 static struct ccw_device_id tape_3590_ids[] = { 1700 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, 1701 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, 1702 { /* end of list */ } 1703 }; 1704 1705 static int 1706 tape_3590_online(struct ccw_device *cdev) 1707 { 1708 return tape_generic_online(dev_get_drvdata(&cdev->dev), 1709 &tape_discipline_3590); 1710 } 1711 1712 static struct ccw_driver tape_3590_driver = { 1713 .name = "tape_3590", 1714 .owner = THIS_MODULE, 1715 .ids = tape_3590_ids, 1716 .probe = tape_generic_probe, 1717 .remove = tape_generic_remove, 1718 .set_offline = tape_generic_offline, 1719 .set_online = tape_3590_online, 1720 .freeze = tape_generic_pm_suspend, 1721 }; 1722 1723 /* 1724 * Setup discipline structure. 1725 */ 1726 static int 1727 tape_3590_init(void) 1728 { 1729 int rc; 1730 1731 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); 1732 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); 1733 #ifdef DBF_LIKE_HELL 1734 debug_set_level(TAPE_DBF_AREA, 6); 1735 #endif 1736 1737 DBF_EVENT(3, "3590 init\n"); 1738 1739 tape_3590_wq = alloc_workqueue("tape_3590", 0, 0); 1740 if (!tape_3590_wq) 1741 return -ENOMEM; 1742 1743 /* Register driver for 3590 tapes. */ 1744 rc = ccw_driver_register(&tape_3590_driver); 1745 if (rc) { 1746 destroy_workqueue(tape_3590_wq); 1747 DBF_EVENT(3, "3590 init failed\n"); 1748 } else 1749 DBF_EVENT(3, "3590 registered\n"); 1750 return rc; 1751 } 1752 1753 static void 1754 tape_3590_exit(void) 1755 { 1756 ccw_driver_unregister(&tape_3590_driver); 1757 destroy_workqueue(tape_3590_wq); 1758 debug_unregister(TAPE_DBF_AREA); 1759 } 1760 1761 MODULE_DEVICE_TABLE(ccw, tape_3590_ids); 1762 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); 1763 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); 1764 MODULE_LICENSE("GPL"); 1765 1766 module_init(tape_3590_init); 1767 module_exit(tape_3590_exit); 1768