tape_3590.c revision e29630627702571eb2b2a0955605b7f8971c82c1
1/* 2 * drivers/s390/char/tape_3590.c 3 * tape device discipline for 3590 tapes. 4 * 5 * Copyright IBM Corp. 2001,2006 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#include <linux/module.h> 12#include <linux/init.h> 13#include <linux/bio.h> 14#include <asm/ebcdic.h> 15 16#define TAPE_DBF_AREA tape_3590_dbf 17 18#include "tape.h" 19#include "tape_std.h" 20#include "tape_3590.h" 21 22/* 23 * Pointer to debug area. 24 */ 25debug_info_t *TAPE_DBF_AREA = NULL; 26EXPORT_SYMBOL(TAPE_DBF_AREA); 27 28/******************************************************************* 29 * Error Recovery fuctions: 30 * - Read Opposite: implemented 31 * - Read Device (buffered) log: BRA 32 * - Read Library log: BRA 33 * - Swap Devices: BRA 34 * - Long Busy: implemented 35 * - Special Intercept: BRA 36 * - Read Alternate: implemented 37 *******************************************************************/ 38 39#define PRINTK_HEADER "TAPE_3590: " 40 41static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = { 42 [0x00] = "", 43 [0x10] = "Lost Sense", 44 [0x11] = "Assigned Elsewhere", 45 [0x12] = "Allegiance Reset", 46 [0x13] = "Shared Access Violation", 47 [0x20] = "Command Reject", 48 [0x21] = "Configuration Error", 49 [0x22] = "Protection Exception", 50 [0x23] = "Write Protect", 51 [0x24] = "Write Length", 52 [0x25] = "Read-Only Format", 53 [0x31] = "Beginning of Partition", 54 [0x33] = "End of Partition", 55 [0x34] = "End of Data", 56 [0x35] = "Block not found", 57 [0x40] = "Device Intervention", 58 [0x41] = "Loader Intervention", 59 [0x42] = "Library Intervention", 60 [0x50] = "Write Error", 61 [0x51] = "Erase Error", 62 [0x52] = "Formatting Error", 63 [0x53] = "Read Error", 64 [0x54] = "Unsupported Format", 65 [0x55] = "No Formatting", 66 [0x56] = "Positioning lost", 67 [0x57] = "Read Length", 68 [0x60] = "Unsupported Medium", 69 [0x61] = "Medium Length Error", 70 [0x62] = "Medium removed", 71 [0x64] = "Load Check", 72 [0x65] = "Unload Check", 73 [0x70] = "Equipment Check", 74 [0x71] = "Bus out Check", 75 [0x72] = "Protocol Error", 76 [0x73] = "Interface Error", 77 [0x74] = "Overrun", 78 [0x75] = "Halt Signal", 79 [0x90] = "Device fenced", 80 [0x91] = "Device Path fenced", 81 [0xa0] = "Volume misplaced", 82 [0xa1] = "Volume inaccessible", 83 [0xa2] = "Volume in input", 84 [0xa3] = "Volume ejected", 85 [0xa4] = "All categories reserved", 86 [0xa5] = "Duplicate Volume", 87 [0xa6] = "Library Manager Offline", 88 [0xa7] = "Library Output Station full", 89 [0xa8] = "Vision System non-operational", 90 [0xa9] = "Library Manager Equipment Check", 91 [0xaa] = "Library Equipment Check", 92 [0xab] = "All Library Cells full", 93 [0xac] = "No Cleaner Volumes in Library", 94 [0xad] = "I/O Station door open", 95 [0xae] = "Subsystem environmental alert", 96}; 97 98static int crypt_supported(struct tape_device *device) 99{ 100 return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device)); 101} 102 103static int crypt_enabled(struct tape_device *device) 104{ 105 return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device)); 106} 107 108static void ext_to_int_kekl(struct tape390_kekl *in, 109 struct tape3592_kekl *out) 110{ 111 int i; 112 113 memset(out, 0, sizeof(*out)); 114 if (in->type == TAPE390_KEKL_TYPE_HASH) 115 out->flags |= 0x40; 116 if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH) 117 out->flags |= 0x80; 118 strncpy(out->label, in->label, 64); 119 for (i = strlen(in->label); i < sizeof(out->label); i++) 120 out->label[i] = ' '; 121 ASCEBC(out->label, sizeof(out->label)); 122} 123 124static void int_to_ext_kekl(struct tape3592_kekl *in, 125 struct tape390_kekl *out) 126{ 127 memset(out, 0, sizeof(*out)); 128 if(in->flags & 0x40) 129 out->type = TAPE390_KEKL_TYPE_HASH; 130 else 131 out->type = TAPE390_KEKL_TYPE_LABEL; 132 if(in->flags & 0x80) 133 out->type_on_tape = TAPE390_KEKL_TYPE_HASH; 134 else 135 out->type_on_tape = TAPE390_KEKL_TYPE_LABEL; 136 memcpy(out->label, in->label, sizeof(in->label)); 137 EBCASC(out->label, sizeof(in->label)); 138 strstrip(out->label); 139} 140 141static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in, 142 struct tape390_kekl_pair *out) 143{ 144 if (in->count == 0) { 145 out->kekl[0].type = TAPE390_KEKL_TYPE_NONE; 146 out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE; 147 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; 148 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; 149 } else if (in->count == 1) { 150 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); 151 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; 152 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; 153 } else if (in->count == 2) { 154 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); 155 int_to_ext_kekl(&in->kekl[1], &out->kekl[1]); 156 } else { 157 printk("Invalid KEKL number: %d\n", in->count); 158 BUG(); 159 } 160} 161 162static int check_ext_kekl(struct tape390_kekl *kekl) 163{ 164 if (kekl->type == TAPE390_KEKL_TYPE_NONE) 165 goto invalid; 166 if (kekl->type > TAPE390_KEKL_TYPE_HASH) 167 goto invalid; 168 if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE) 169 goto invalid; 170 if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH) 171 goto invalid; 172 if ((kekl->type == TAPE390_KEKL_TYPE_HASH) && 173 (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL)) 174 goto invalid; 175 176 return 0; 177invalid: 178 return -EINVAL; 179} 180 181static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls) 182{ 183 if (check_ext_kekl(&kekls->kekl[0])) 184 goto invalid; 185 if (check_ext_kekl(&kekls->kekl[1])) 186 goto invalid; 187 188 return 0; 189invalid: 190 return -EINVAL; 191} 192 193/* 194 * Query KEKLs 195 */ 196static int tape_3592_kekl_query(struct tape_device *device, 197 struct tape390_kekl_pair *ext_kekls) 198{ 199 struct tape_request *request; 200 struct tape3592_kekl_query_order *order; 201 struct tape3592_kekl_query_data *int_kekls; 202 int rc; 203 204 DBF_EVENT(6, "tape3592_kekl_query\n"); 205 int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA); 206 if (!int_kekls) 207 return -ENOMEM; 208 request = tape_alloc_request(2, sizeof(*order)); 209 if (IS_ERR(request)) { 210 rc = PTR_ERR(request); 211 goto fail_malloc; 212 } 213 order = request->cpdata; 214 memset(order,0,sizeof(*order)); 215 order->code = 0xe2; 216 order->max_count = 2; 217 request->op = TO_KEKL_QUERY; 218 tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); 219 tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls), 220 int_kekls); 221 rc = tape_do_io(device, request); 222 if (rc) 223 goto fail_request; 224 int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls); 225 226 rc = 0; 227fail_request: 228 tape_free_request(request); 229fail_malloc: 230 kfree(int_kekls); 231 return rc; 232} 233 234/* 235 * IOCTL: Query KEKLs 236 */ 237static int tape_3592_ioctl_kekl_query(struct tape_device *device, 238 unsigned long arg) 239{ 240 int rc; 241 struct tape390_kekl_pair *ext_kekls; 242 243 DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n"); 244 if (!crypt_supported(device)) 245 return -ENOSYS; 246 if (!crypt_enabled(device)) 247 return -EUNATCH; 248 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); 249 if (!ext_kekls) 250 return -ENOMEM; 251 rc = tape_3592_kekl_query(device, ext_kekls); 252 if (rc != 0) 253 goto fail; 254 if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) { 255 rc = -EFAULT; 256 goto fail; 257 } 258 rc = 0; 259fail: 260 kfree(ext_kekls); 261 return rc; 262} 263 264static int tape_3590_mttell(struct tape_device *device, int mt_count); 265 266/* 267 * Set KEKLs 268 */ 269static int tape_3592_kekl_set(struct tape_device *device, 270 struct tape390_kekl_pair *ext_kekls) 271{ 272 struct tape_request *request; 273 struct tape3592_kekl_set_order *order; 274 275 DBF_EVENT(6, "tape3592_kekl_set\n"); 276 if (check_ext_kekl_pair(ext_kekls)) { 277 DBF_EVENT(6, "invalid kekls\n"); 278 return -EINVAL; 279 } 280 if (tape_3590_mttell(device, 0) != 0) 281 return -EBADSLT; 282 request = tape_alloc_request(1, sizeof(*order)); 283 if (IS_ERR(request)) 284 return PTR_ERR(request); 285 order = request->cpdata; 286 memset(order, 0, sizeof(*order)); 287 order->code = 0xe3; 288 order->kekls.count = 2; 289 ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]); 290 ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]); 291 request->op = TO_KEKL_SET; 292 tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); 293 294 return tape_do_io_free(device, request); 295} 296 297/* 298 * IOCTL: Set KEKLs 299 */ 300static int tape_3592_ioctl_kekl_set(struct tape_device *device, 301 unsigned long arg) 302{ 303 int rc; 304 struct tape390_kekl_pair *ext_kekls; 305 306 DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n"); 307 if (!crypt_supported(device)) 308 return -ENOSYS; 309 if (!crypt_enabled(device)) 310 return -EUNATCH; 311 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); 312 if (!ext_kekls) 313 return -ENOMEM; 314 if (copy_from_user(ext_kekls, (char __user *)arg, sizeof(*ext_kekls))) { 315 rc = -EFAULT; 316 goto out; 317 } 318 rc = tape_3592_kekl_set(device, ext_kekls); 319out: 320 kfree(ext_kekls); 321 return rc; 322} 323 324/* 325 * Enable encryption 326 */ 327static int tape_3592_enable_crypt(struct tape_device *device) 328{ 329 struct tape_request *request; 330 char *data; 331 332 DBF_EVENT(6, "tape_3592_enable_crypt\n"); 333 if (!crypt_supported(device)) 334 return -ENOSYS; 335 request = tape_alloc_request(2, 72); 336 if (IS_ERR(request)) 337 return PTR_ERR(request); 338 data = request->cpdata; 339 memset(data,0,72); 340 341 data[0] = 0x05; 342 data[36 + 0] = 0x03; 343 data[36 + 1] = 0x03; 344 data[36 + 4] = 0x40; 345 data[36 + 6] = 0x01; 346 data[36 + 14] = 0x2f; 347 data[36 + 18] = 0xc3; 348 data[36 + 35] = 0x72; 349 request->op = TO_CRYPT_ON; 350 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 351 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 352 return tape_do_io_free(device, request); 353} 354 355/* 356 * Disable encryption 357 */ 358static int tape_3592_disable_crypt(struct tape_device *device) 359{ 360 struct tape_request *request; 361 char *data; 362 363 DBF_EVENT(6, "tape_3592_disable_crypt\n"); 364 if (!crypt_supported(device)) 365 return -ENOSYS; 366 request = tape_alloc_request(2, 72); 367 if (IS_ERR(request)) 368 return PTR_ERR(request); 369 data = request->cpdata; 370 memset(data,0,72); 371 372 data[0] = 0x05; 373 data[36 + 0] = 0x03; 374 data[36 + 1] = 0x03; 375 data[36 + 35] = 0x32; 376 377 request->op = TO_CRYPT_OFF; 378 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 379 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 380 381 return tape_do_io_free(device, request); 382} 383 384/* 385 * IOCTL: Set encryption status 386 */ 387static int tape_3592_ioctl_crypt_set(struct tape_device *device, 388 unsigned long arg) 389{ 390 struct tape390_crypt_info info; 391 392 DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n"); 393 if (!crypt_supported(device)) 394 return -ENOSYS; 395 if (copy_from_user(&info, (char __user *)arg, sizeof(info))) 396 return -EFAULT; 397 if (info.status & ~TAPE390_CRYPT_ON_MASK) 398 return -EINVAL; 399 if (info.status & TAPE390_CRYPT_ON_MASK) 400 return tape_3592_enable_crypt(device); 401 else 402 return tape_3592_disable_crypt(device); 403} 404 405static int tape_3590_sense_medium(struct tape_device *device); 406 407/* 408 * IOCTL: Query enryption status 409 */ 410static int tape_3592_ioctl_crypt_query(struct tape_device *device, 411 unsigned long arg) 412{ 413 DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n"); 414 if (!crypt_supported(device)) 415 return -ENOSYS; 416 tape_3590_sense_medium(device); 417 if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device), 418 sizeof(TAPE_3590_CRYPT_INFO(device)))) 419 return -EFAULT; 420 else 421 return 0; 422} 423 424/* 425 * 3590 IOCTL Overload 426 */ 427static int 428tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) 429{ 430 switch (cmd) { 431 case TAPE390_DISPLAY: { 432 struct display_struct disp; 433 434 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp))) 435 return -EFAULT; 436 437 return tape_std_display(device, &disp); 438 } 439 case TAPE390_KEKL_SET: 440 return tape_3592_ioctl_kekl_set(device, arg); 441 case TAPE390_KEKL_QUERY: 442 return tape_3592_ioctl_kekl_query(device, arg); 443 case TAPE390_CRYPT_SET: 444 return tape_3592_ioctl_crypt_set(device, arg); 445 case TAPE390_CRYPT_QUERY: 446 return tape_3592_ioctl_crypt_query(device, arg); 447 default: 448 return -EINVAL; /* no additional ioctls */ 449 } 450} 451 452/* 453 * SENSE Medium: Get Sense data about medium state 454 */ 455static int 456tape_3590_sense_medium(struct tape_device *device) 457{ 458 struct tape_request *request; 459 460 request = tape_alloc_request(1, 128); 461 if (IS_ERR(request)) 462 return PTR_ERR(request); 463 request->op = TO_MSEN; 464 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); 465 return tape_do_io_free(device, request); 466} 467 468/* 469 * MTTELL: Tell block. Return the number of block relative to current file. 470 */ 471static int 472tape_3590_mttell(struct tape_device *device, int mt_count) 473{ 474 __u64 block_id; 475 int rc; 476 477 rc = tape_std_read_block_id(device, &block_id); 478 if (rc) 479 return rc; 480 return block_id >> 32; 481} 482 483/* 484 * MTSEEK: seek to the specified block. 485 */ 486static int 487tape_3590_mtseek(struct tape_device *device, int count) 488{ 489 struct tape_request *request; 490 491 DBF_EVENT(6, "xsee id: %x\n", count); 492 request = tape_alloc_request(3, 4); 493 if (IS_ERR(request)) 494 return PTR_ERR(request); 495 request->op = TO_LBL; 496 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 497 *(__u32 *) request->cpdata = count; 498 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 499 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 500 return tape_do_io_free(device, request); 501} 502 503/* 504 * Read Opposite Error Recovery Function: 505 * Used, when Read Forward does not work 506 */ 507static void 508tape_3590_read_opposite(struct tape_device *device, 509 struct tape_request *request) 510{ 511 struct tape_3590_disc_data *data; 512 513 /* 514 * We have allocated 4 ccws in tape_std_read, so we can now 515 * transform the request to a read backward, followed by a 516 * forward space block. 517 */ 518 request->op = TO_RBA; 519 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 520 data = device->discdata; 521 tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op, 522 device->char_data.idal_buf); 523 tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); 524 tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); 525 DBF_EVENT(6, "xrop ccwg\n"); 526} 527 528/* 529 * Read Attention Msg 530 * This should be done after an interrupt with attention bit (0x80) 531 * in device state. 532 * 533 * After a "read attention message" request there are two possible 534 * results: 535 * 536 * 1. A unit check is presented, when attention sense is present (e.g. when 537 * a medium has been unloaded). The attention sense comes then 538 * together with the unit check. The recovery action is either "retry" 539 * (in case there is an attention message pending) or "permanent error". 540 * 541 * 2. The attention msg is written to the "read subsystem data" buffer. 542 * In this case we probably should print it to the console. 543 */ 544static int 545tape_3590_read_attmsg(struct tape_device *device) 546{ 547 struct tape_request *request; 548 char *buf; 549 550 request = tape_alloc_request(3, 4096); 551 if (IS_ERR(request)) 552 return PTR_ERR(request); 553 request->op = TO_READ_ATTMSG; 554 buf = request->cpdata; 555 buf[0] = PREP_RD_SS_DATA; 556 buf[6] = RD_ATTMSG; /* read att msg */ 557 tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf); 558 tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12); 559 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 560 return tape_do_io_free(device, request); 561} 562 563/* 564 * These functions are used to schedule follow-up actions from within an 565 * interrupt context (like unsolicited interrupts). 566 */ 567struct work_handler_data { 568 struct tape_device *device; 569 enum tape_op op; 570 struct work_struct work; 571}; 572 573static void 574tape_3590_work_handler(struct work_struct *work) 575{ 576 struct work_handler_data *p = 577 container_of(work, struct work_handler_data, work); 578 579 switch (p->op) { 580 case TO_MSEN: 581 tape_3590_sense_medium(p->device); 582 break; 583 case TO_READ_ATTMSG: 584 tape_3590_read_attmsg(p->device); 585 break; 586 case TO_CRYPT_ON: 587 tape_3592_enable_crypt(p->device); 588 break; 589 case TO_CRYPT_OFF: 590 tape_3592_disable_crypt(p->device); 591 break; 592 default: 593 DBF_EVENT(3, "T3590: work handler undefined for " 594 "operation 0x%02x\n", p->op); 595 } 596 tape_put_device(p->device); 597 kfree(p); 598} 599 600static int 601tape_3590_schedule_work(struct tape_device *device, enum tape_op op) 602{ 603 struct work_handler_data *p; 604 605 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) 606 return -ENOMEM; 607 608 INIT_WORK(&p->work, tape_3590_work_handler); 609 610 p->device = tape_get_device_reference(device); 611 p->op = op; 612 613 schedule_work(&p->work); 614 return 0; 615} 616 617#ifdef CONFIG_S390_TAPE_BLOCK 618/* 619 * Tape Block READ 620 */ 621static struct tape_request * 622tape_3590_bread(struct tape_device *device, struct request *req) 623{ 624 struct tape_request *request; 625 struct ccw1 *ccw; 626 int count = 0, start_block, i; 627 unsigned off; 628 char *dst; 629 struct bio_vec *bv; 630 struct bio *bio; 631 632 DBF_EVENT(6, "xBREDid:"); 633 start_block = req->sector >> TAPEBLOCK_HSEC_S2B; 634 DBF_EVENT(6, "start_block = %i\n", start_block); 635 636 rq_for_each_bio(bio, req) { 637 bio_for_each_segment(bv, bio, i) { 638 count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9); 639 } 640 } 641 request = tape_alloc_request(2 + count + 1, 4); 642 if (IS_ERR(request)) 643 return request; 644 request->op = TO_BLOCK; 645 *(__u32 *) request->cpdata = start_block; 646 ccw = request->cpaddr; 647 ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte); 648 649 /* 650 * We always setup a nop after the mode set ccw. This slot is 651 * used in tape_std_check_locate to insert a locate ccw if the 652 * current tape position doesn't match the start block to be read. 653 */ 654 ccw = tape_ccw_cc(ccw, NOP, 0, NULL); 655 656 rq_for_each_bio(bio, req) { 657 bio_for_each_segment(bv, bio, i) { 658 dst = page_address(bv->bv_page) + bv->bv_offset; 659 for (off = 0; off < bv->bv_len; 660 off += TAPEBLOCK_HSEC_SIZE) { 661 ccw->flags = CCW_FLAG_CC; 662 ccw->cmd_code = READ_FORWARD; 663 ccw->count = TAPEBLOCK_HSEC_SIZE; 664 set_normalized_cda(ccw, (void *) __pa(dst)); 665 ccw++; 666 dst += TAPEBLOCK_HSEC_SIZE; 667 } 668 if (off > bv->bv_len) 669 BUG(); 670 } 671 } 672 ccw = tape_ccw_end(ccw, NOP, 0, NULL); 673 DBF_EVENT(6, "xBREDccwg\n"); 674 return request; 675} 676 677static void 678tape_3590_free_bread(struct tape_request *request) 679{ 680 struct ccw1 *ccw; 681 682 /* Last ccw is a nop and doesn't need clear_normalized_cda */ 683 for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++) 684 if (ccw->cmd_code == READ_FORWARD) 685 clear_normalized_cda(ccw); 686 tape_free_request(request); 687} 688 689/* 690 * check_locate is called just before the tape request is passed to 691 * the common io layer for execution. It has to check the current 692 * tape position and insert a locate ccw if it doesn't match the 693 * start block for the request. 694 */ 695static void 696tape_3590_check_locate(struct tape_device *device, struct tape_request *request) 697{ 698 __u32 *start_block; 699 700 start_block = (__u32 *) request->cpdata; 701 if (*start_block != device->blk_data.block_position) { 702 /* Add the start offset of the file to get the real block. */ 703 *start_block += device->bof; 704 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 705 } 706} 707#endif 708 709static void tape_3590_med_state_set(struct tape_device *device, 710 struct tape_3590_med_sense *sense) 711{ 712 struct tape390_crypt_info *c_info; 713 714 c_info = &TAPE_3590_CRYPT_INFO(device); 715 716 if (sense->masst == MSENSE_UNASSOCIATED) { 717 tape_med_state_set(device, MS_UNLOADED); 718 TAPE_3590_CRYPT_INFO(device).medium_status = 0; 719 return; 720 } 721 if (sense->masst != MSENSE_ASSOCIATED_MOUNT) { 722 PRINT_ERR("Unknown medium state: %x\n", sense->masst); 723 return; 724 } 725 tape_med_state_set(device, MS_LOADED); 726 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; 727 if (sense->flags & MSENSE_CRYPT_MASK) { 728 PRINT_INFO("Medium is encrypted (%04x)\n", sense->flags); 729 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK; 730 } else { 731 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags); 732 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK; 733 } 734} 735 736/* 737 * The done handler is called at device/channel end and wakes up the sleeping 738 * process 739 */ 740static int 741tape_3590_done(struct tape_device *device, struct tape_request *request) 742{ 743 struct tape_3590_disc_data *disc_data; 744 745 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); 746 disc_data = device->discdata; 747 748 switch (request->op) { 749 case TO_BSB: 750 case TO_BSF: 751 case TO_DSE: 752 case TO_FSB: 753 case TO_FSF: 754 case TO_LBL: 755 case TO_RFO: 756 case TO_RBA: 757 case TO_REW: 758 case TO_WRI: 759 case TO_WTM: 760 case TO_BLOCK: 761 case TO_LOAD: 762 tape_med_state_set(device, MS_LOADED); 763 break; 764 case TO_RUN: 765 tape_med_state_set(device, MS_UNLOADED); 766 tape_3590_schedule_work(device, TO_CRYPT_OFF); 767 break; 768 case TO_MSEN: 769 tape_3590_med_state_set(device, request->cpdata); 770 break; 771 case TO_CRYPT_ON: 772 TAPE_3590_CRYPT_INFO(device).status 773 |= TAPE390_CRYPT_ON_MASK; 774 *(device->modeset_byte) |= 0x03; 775 break; 776 case TO_CRYPT_OFF: 777 TAPE_3590_CRYPT_INFO(device).status 778 &= ~TAPE390_CRYPT_ON_MASK; 779 *(device->modeset_byte) &= ~0x03; 780 break; 781 case TO_RBI: /* RBI seems to succeed even without medium loaded. */ 782 case TO_NOP: /* Same to NOP. */ 783 case TO_READ_CONFIG: 784 case TO_READ_ATTMSG: 785 case TO_DIS: 786 case TO_ASSIGN: 787 case TO_UNASSIGN: 788 case TO_SIZE: 789 case TO_KEKL_SET: 790 case TO_KEKL_QUERY: 791 case TO_RDC: 792 break; 793 } 794 return TAPE_IO_SUCCESS; 795} 796 797/* 798 * This fuction is called, when error recovery was successfull 799 */ 800static inline int 801tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) 802{ 803 DBF_EVENT(3, "Error Recovery successfull for %s\n", 804 tape_op_verbose[request->op]); 805 return tape_3590_done(device, request); 806} 807 808/* 809 * This fuction is called, when error recovery was not successfull 810 */ 811static inline int 812tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, 813 struct irb *irb, int rc) 814{ 815 DBF_EVENT(3, "Error Recovery failed for %s\n", 816 tape_op_verbose[request->op]); 817 tape_dump_sense_dbf(device, request, irb); 818 return rc; 819} 820 821/* 822 * Error Recovery do retry 823 */ 824static inline int 825tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, 826 struct irb *irb) 827{ 828 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); 829 tape_dump_sense_dbf(device, request, irb); 830 return TAPE_IO_RETRY; 831} 832 833/* 834 * Handle unsolicited interrupts 835 */ 836static int 837tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) 838{ 839 if (irb->scsw.dstat == DEV_STAT_CHN_END) 840 /* Probably result of halt ssch */ 841 return TAPE_IO_PENDING; 842 else if (irb->scsw.dstat == 0x85) 843 /* Device Ready -> check medium state */ 844 tape_3590_schedule_work(device, TO_MSEN); 845 else if (irb->scsw.dstat & DEV_STAT_ATTENTION) 846 tape_3590_schedule_work(device, TO_READ_ATTMSG); 847 else { 848 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); 849 PRINT_WARN("Unsolicited IRQ (Device End) caught.\n"); 850 tape_dump_sense(device, NULL, irb); 851 } 852 return TAPE_IO_SUCCESS; 853} 854 855/* 856 * Basic Recovery routine 857 */ 858static int 859tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, 860 struct irb *irb, int rc) 861{ 862 struct tape_3590_sense *sense; 863 864 sense = (struct tape_3590_sense *) irb->ecw; 865 866 switch (sense->bra) { 867 case SENSE_BRA_PER: 868 return tape_3590_erp_failed(device, request, irb, rc); 869 case SENSE_BRA_CONT: 870 return tape_3590_erp_succeded(device, request); 871 case SENSE_BRA_RE: 872 return tape_3590_erp_retry(device, request, irb); 873 case SENSE_BRA_DRE: 874 return tape_3590_erp_failed(device, request, irb, rc); 875 default: 876 PRINT_ERR("Unknown BRA %x - This should not happen!\n", 877 sense->bra); 878 BUG(); 879 return TAPE_IO_STOP; 880 } 881} 882 883/* 884 * RDL: Read Device (buffered) log 885 */ 886static int 887tape_3590_erp_read_buf_log(struct tape_device *device, 888 struct tape_request *request, struct irb *irb) 889{ 890 /* 891 * We just do the basic error recovery at the moment (retry). 892 * Perhaps in the future, we read the log and dump it somewhere... 893 */ 894 return tape_3590_erp_basic(device, request, irb, -EIO); 895} 896 897/* 898 * SWAP: Swap Devices 899 */ 900static int 901tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, 902 struct irb *irb) 903{ 904 /* 905 * This error recovery should swap the tapes 906 * if the original has a problem. The operation 907 * should proceed with the new tape... this 908 * should probably be done in user space! 909 */ 910 PRINT_WARN("(%s): Swap Tape Device!\n", device->cdev->dev.bus_id); 911 return tape_3590_erp_basic(device, request, irb, -EIO); 912} 913 914/* 915 * LBY: Long Busy 916 */ 917static int 918tape_3590_erp_long_busy(struct tape_device *device, 919 struct tape_request *request, struct irb *irb) 920{ 921 DBF_EVENT(6, "Device is busy\n"); 922 return TAPE_IO_LONG_BUSY; 923} 924 925/* 926 * SPI: Special Intercept 927 */ 928static int 929tape_3590_erp_special_interrupt(struct tape_device *device, 930 struct tape_request *request, struct irb *irb) 931{ 932 return tape_3590_erp_basic(device, request, irb, -EIO); 933} 934 935/* 936 * RDA: Read Alternate 937 */ 938static int 939tape_3590_erp_read_alternate(struct tape_device *device, 940 struct tape_request *request, struct irb *irb) 941{ 942 struct tape_3590_disc_data *data; 943 944 /* 945 * The issued Read Backward or Read Previous command is not 946 * supported by the device 947 * The recovery action should be to issue another command: 948 * Read Revious: if Read Backward is not supported 949 * Read Backward: if Read Previous is not supported 950 */ 951 data = device->discdata; 952 if (data->read_back_op == READ_PREVIOUS) { 953 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", 954 device->cdev_id); 955 data->read_back_op = READ_BACKWARD; 956 } else { 957 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", 958 device->cdev_id); 959 data->read_back_op = READ_PREVIOUS; 960 } 961 tape_3590_read_opposite(device, request); 962 return tape_3590_erp_retry(device, request, irb); 963} 964 965/* 966 * Error Recovery read opposite 967 */ 968static int 969tape_3590_erp_read_opposite(struct tape_device *device, 970 struct tape_request *request, struct irb *irb) 971{ 972 switch (request->op) { 973 case TO_RFO: 974 /* 975 * We did read forward, but the data could not be read. 976 * We will read backward and then skip forward again. 977 */ 978 tape_3590_read_opposite(device, request); 979 return tape_3590_erp_retry(device, request, irb); 980 case TO_RBA: 981 /* We tried to read forward and backward, but hat no success */ 982 return tape_3590_erp_failed(device, request, irb, -EIO); 983 break; 984 default: 985 PRINT_WARN("read_opposite_recovery_called_with_op: %s\n", 986 tape_op_verbose[request->op]); 987 return tape_3590_erp_failed(device, request, irb, -EIO); 988 } 989} 990 991/* 992 * Print an MIM (Media Information Message) (message code f0) 993 */ 994static void 995tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) 996{ 997 struct tape_3590_sense *sense; 998 999 sense = (struct tape_3590_sense *) irb->ecw; 1000 /* Exception Message */ 1001 switch (sense->fmt.f70.emc) { 1002 case 0x02: 1003 PRINT_WARN("(%s): Data degraded\n", device->cdev->dev.bus_id); 1004 break; 1005 case 0x03: 1006 PRINT_WARN("(%s): Data degraded in partion %i\n", 1007 device->cdev->dev.bus_id, sense->fmt.f70.mp); 1008 break; 1009 case 0x04: 1010 PRINT_WARN("(%s): Medium degraded\n", device->cdev->dev.bus_id); 1011 break; 1012 case 0x05: 1013 PRINT_WARN("(%s): Medium degraded in partition %i\n", 1014 device->cdev->dev.bus_id, sense->fmt.f70.mp); 1015 break; 1016 case 0x06: 1017 PRINT_WARN("(%s): Block 0 Error\n", device->cdev->dev.bus_id); 1018 break; 1019 case 0x07: 1020 PRINT_WARN("(%s): Medium Exception 0x%02x\n", 1021 device->cdev->dev.bus_id, sense->fmt.f70.md); 1022 break; 1023 default: 1024 PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n", 1025 device->cdev->dev.bus_id, sense->fmt.f70.emc); 1026 break; 1027 } 1028 /* Service Message */ 1029 switch (sense->fmt.f70.smc) { 1030 case 0x02: 1031 PRINT_WARN("(%s): Reference Media maintenance procedure %i\n", 1032 device->cdev->dev.bus_id, sense->fmt.f70.md); 1033 break; 1034 default: 1035 PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n", 1036 device->cdev->dev.bus_id, sense->fmt.f70.smc); 1037 break; 1038 } 1039} 1040 1041/* 1042 * Print an I/O Subsystem Service Information Message (message code f1) 1043 */ 1044static void 1045tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) 1046{ 1047 struct tape_3590_sense *sense; 1048 1049 sense = (struct tape_3590_sense *) irb->ecw; 1050 /* Exception Message */ 1051 switch (sense->fmt.f71.emc) { 1052 case 0x01: 1053 PRINT_WARN("(%s): Effect of failure is unknown\n", 1054 device->cdev->dev.bus_id); 1055 break; 1056 case 0x02: 1057 PRINT_WARN("(%s): CU Exception - no performance impact\n", 1058 device->cdev->dev.bus_id); 1059 break; 1060 case 0x03: 1061 PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n", 1062 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1063 break; 1064 case 0x04: 1065 PRINT_WARN("(%s): CU Exception on device path 0x%02x\n", 1066 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1067 break; 1068 case 0x05: 1069 PRINT_WARN("(%s): CU Exception on library path 0x%02x\n", 1070 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1071 break; 1072 case 0x06: 1073 PRINT_WARN("(%s): CU Exception on node 0x%02x\n", 1074 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1075 break; 1076 case 0x07: 1077 PRINT_WARN("(%s): CU Exception on partition 0x%02x\n", 1078 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1079 break; 1080 default: 1081 PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n", 1082 device->cdev->dev.bus_id, sense->fmt.f71.emc); 1083 } 1084 /* Service Message */ 1085 switch (sense->fmt.f71.smc) { 1086 case 0x01: 1087 PRINT_WARN("(%s): Repair impact is unknown\n", 1088 device->cdev->dev.bus_id); 1089 break; 1090 case 0x02: 1091 PRINT_WARN("(%s): Repair will not impact cu performance\n", 1092 device->cdev->dev.bus_id); 1093 break; 1094 case 0x03: 1095 if (sense->fmt.f71.mdf == 0) 1096 PRINT_WARN("(%s): Repair will disable node " 1097 "0x%x on CU\n", 1098 device->cdev->dev.bus_id, 1099 sense->fmt.f71.md[1]); 1100 else 1101 PRINT_WARN("(%s): Repair will disable nodes " 1102 "(0x%x-0x%x) on CU\n", 1103 device->cdev->dev.bus_id, 1104 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1105 break; 1106 case 0x04: 1107 if (sense->fmt.f71.mdf == 0) 1108 PRINT_WARN("(%s): Repair will disable cannel path " 1109 "0x%x on CU\n", 1110 device->cdev->dev.bus_id, 1111 sense->fmt.f71.md[1]); 1112 else 1113 PRINT_WARN("(%s): Repair will disable cannel paths " 1114 "(0x%x-0x%x) on CU\n", 1115 device->cdev->dev.bus_id, 1116 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1117 break; 1118 case 0x05: 1119 if (sense->fmt.f71.mdf == 0) 1120 PRINT_WARN("(%s): Repair will disable device path " 1121 "0x%x on CU\n", 1122 device->cdev->dev.bus_id, 1123 sense->fmt.f71.md[1]); 1124 else 1125 PRINT_WARN("(%s): Repair will disable device paths " 1126 "(0x%x-0x%x) on CU\n", 1127 device->cdev->dev.bus_id, 1128 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1129 break; 1130 case 0x06: 1131 if (sense->fmt.f71.mdf == 0) 1132 PRINT_WARN("(%s): Repair will disable library path " 1133 "0x%x on CU\n", 1134 device->cdev->dev.bus_id, 1135 sense->fmt.f71.md[1]); 1136 else 1137 PRINT_WARN("(%s): Repair will disable library paths " 1138 "(0x%x-0x%x) on CU\n", 1139 device->cdev->dev.bus_id, 1140 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1141 break; 1142 case 0x07: 1143 PRINT_WARN("(%s): Repair will disable access to CU\n", 1144 device->cdev->dev.bus_id); 1145 break; 1146 default: 1147 PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n", 1148 device->cdev->dev.bus_id, sense->fmt.f71.smc); 1149 } 1150} 1151 1152/* 1153 * Print an Device Subsystem Service Information Message (message code f2) 1154 */ 1155static void 1156tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) 1157{ 1158 struct tape_3590_sense *sense; 1159 1160 sense = (struct tape_3590_sense *) irb->ecw; 1161 /* Exception Message */ 1162 switch (sense->fmt.f71.emc) { 1163 case 0x01: 1164 PRINT_WARN("(%s): Effect of failure is unknown\n", 1165 device->cdev->dev.bus_id); 1166 break; 1167 case 0x02: 1168 PRINT_WARN("(%s): DV Exception - no performance impact\n", 1169 device->cdev->dev.bus_id); 1170 break; 1171 case 0x03: 1172 PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n", 1173 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1174 break; 1175 case 0x04: 1176 PRINT_WARN("(%s): DV Exception on loader 0x%02x\n", 1177 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1178 break; 1179 case 0x05: 1180 PRINT_WARN("(%s): DV Exception on message display 0x%02x\n", 1181 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1182 break; 1183 case 0x06: 1184 PRINT_WARN("(%s): DV Exception in tape path\n", 1185 device->cdev->dev.bus_id); 1186 break; 1187 case 0x07: 1188 PRINT_WARN("(%s): DV Exception in drive\n", 1189 device->cdev->dev.bus_id); 1190 break; 1191 default: 1192 PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n", 1193 device->cdev->dev.bus_id, sense->fmt.f71.emc); 1194 } 1195 /* Service Message */ 1196 switch (sense->fmt.f71.smc) { 1197 case 0x01: 1198 PRINT_WARN("(%s): Repair impact is unknown\n", 1199 device->cdev->dev.bus_id); 1200 break; 1201 case 0x02: 1202 PRINT_WARN("(%s): Repair will not impact device performance\n", 1203 device->cdev->dev.bus_id); 1204 break; 1205 case 0x03: 1206 if (sense->fmt.f71.mdf == 0) 1207 PRINT_WARN("(%s): Repair will disable channel path " 1208 "0x%x on DV\n", 1209 device->cdev->dev.bus_id, 1210 sense->fmt.f71.md[1]); 1211 else 1212 PRINT_WARN("(%s): Repair will disable channel path " 1213 "(0x%x-0x%x) on DV\n", 1214 device->cdev->dev.bus_id, 1215 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1216 break; 1217 case 0x04: 1218 if (sense->fmt.f71.mdf == 0) 1219 PRINT_WARN("(%s): Repair will disable interface 0x%x " 1220 "on DV\n", 1221 device->cdev->dev.bus_id, 1222 sense->fmt.f71.md[1]); 1223 else 1224 PRINT_WARN("(%s): Repair will disable interfaces " 1225 "(0x%x-0x%x) on DV\n", 1226 device->cdev->dev.bus_id, 1227 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1228 break; 1229 case 0x05: 1230 if (sense->fmt.f71.mdf == 0) 1231 PRINT_WARN("(%s): Repair will disable loader 0x%x " 1232 "on DV\n", 1233 device->cdev->dev.bus_id, 1234 sense->fmt.f71.md[1]); 1235 else 1236 PRINT_WARN("(%s): Repair will disable loader " 1237 "(0x%x-0x%x) on DV\n", 1238 device->cdev->dev.bus_id, 1239 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1240 break; 1241 case 0x07: 1242 PRINT_WARN("(%s): Repair will disable access to DV\n", 1243 device->cdev->dev.bus_id); 1244 break; 1245 case 0x08: 1246 if (sense->fmt.f71.mdf == 0) 1247 PRINT_WARN("(%s): Repair will disable message " 1248 "display 0x%x on DV\n", 1249 device->cdev->dev.bus_id, 1250 sense->fmt.f71.md[1]); 1251 else 1252 PRINT_WARN("(%s): Repair will disable message " 1253 "displays (0x%x-0x%x) on DV\n", 1254 device->cdev->dev.bus_id, 1255 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1256 break; 1257 case 0x09: 1258 PRINT_WARN("(%s): Clean DV\n", device->cdev->dev.bus_id); 1259 break; 1260 default: 1261 PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n", 1262 device->cdev->dev.bus_id, sense->fmt.f71.smc); 1263 } 1264} 1265 1266/* 1267 * Print standard ERA Message 1268 */ 1269static void 1270tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) 1271{ 1272 struct tape_3590_sense *sense; 1273 1274 sense = (struct tape_3590_sense *) irb->ecw; 1275 if (sense->mc == 0) 1276 return; 1277 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { 1278 if (tape_3590_msg[sense->mc] != NULL) 1279 PRINT_WARN("(%s): %s\n", device->cdev->dev.bus_id, 1280 tape_3590_msg[sense->mc]); 1281 else { 1282 PRINT_WARN("(%s): Message Code 0x%x\n", 1283 device->cdev->dev.bus_id, sense->mc); 1284 } 1285 return; 1286 } 1287 if (sense->mc == 0xf0) { 1288 /* Standard Media Information Message */ 1289 PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, " 1290 "RC=%02x-%04x-%02x\n", device->cdev->dev.bus_id, 1291 sense->fmt.f70.sev, sense->mc, 1292 sense->fmt.f70.emc, sense->fmt.f70.smc, 1293 sense->fmt.f70.refcode, sense->fmt.f70.mid, 1294 sense->fmt.f70.fid); 1295 tape_3590_print_mim_msg_f0(device, irb); 1296 return; 1297 } 1298 if (sense->mc == 0xf1) { 1299 /* Standard I/O Subsystem Service Information Message */ 1300 PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, " 1301 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1302 device->cdev->dev.bus_id, sense->fmt.f71.sev, 1303 device->cdev->id.dev_model, 1304 sense->mc, sense->fmt.f71.emc, 1305 sense->fmt.f71.smc, sense->fmt.f71.refcode1, 1306 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); 1307 tape_3590_print_io_sim_msg_f1(device, irb); 1308 return; 1309 } 1310 if (sense->mc == 0xf2) { 1311 /* Standard Device Service Information Message */ 1312 PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, " 1313 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1314 device->cdev->dev.bus_id, sense->fmt.f71.sev, 1315 device->cdev->id.dev_model, 1316 sense->mc, sense->fmt.f71.emc, 1317 sense->fmt.f71.smc, sense->fmt.f71.refcode1, 1318 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); 1319 tape_3590_print_dev_sim_msg_f2(device, irb); 1320 return; 1321 } 1322 if (sense->mc == 0xf3) { 1323 /* Standard Library Service Information Message */ 1324 return; 1325 } 1326 PRINT_WARN("(%s): Device Message(%x)\n", 1327 device->cdev->dev.bus_id, sense->mc); 1328} 1329 1330static int tape_3590_crypt_error(struct tape_device *device, 1331 struct tape_request *request, struct irb *irb) 1332{ 1333 u8 cu_rc, ekm_rc1; 1334 u16 ekm_rc2; 1335 u32 drv_rc; 1336 char *bus_id, *sense; 1337 1338 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; 1339 bus_id = device->cdev->dev.bus_id; 1340 cu_rc = sense[0]; 1341 drv_rc = *((u32*) &sense[5]) & 0xffffff; 1342 ekm_rc1 = sense[9]; 1343 ekm_rc2 = *((u16*) &sense[10]); 1344 if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) 1345 /* key not defined on EKM */ 1346 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); 1347 if ((cu_rc == 1) || (cu_rc == 2)) 1348 /* No connection to EKM */ 1349 return tape_3590_erp_basic(device, request, irb, -ENOTCONN); 1350 1351 PRINT_ERR("(%s): Unable to get encryption key from EKM\n", bus_id); 1352 PRINT_ERR("(%s): CU=%02X DRIVE=%06X EKM=%02X:%04X\n", bus_id, cu_rc, 1353 drv_rc, ekm_rc1, ekm_rc2); 1354 1355 return tape_3590_erp_basic(device, request, irb, -ENOKEY); 1356} 1357 1358/* 1359 * 3590 error Recovery routine: 1360 * If possible, it tries to recover from the error. If this is not possible, 1361 * inform the user about the problem. 1362 */ 1363static int 1364tape_3590_unit_check(struct tape_device *device, struct tape_request *request, 1365 struct irb *irb) 1366{ 1367 struct tape_3590_sense *sense; 1368 int rc; 1369 1370#ifdef CONFIG_S390_TAPE_BLOCK 1371 if (request->op == TO_BLOCK) { 1372 /* 1373 * Recovery for block device requests. Set the block_position 1374 * to something invalid and retry. 1375 */ 1376 device->blk_data.block_position = -1; 1377 if (request->retries-- <= 0) 1378 return tape_3590_erp_failed(device, request, irb, -EIO); 1379 else 1380 return tape_3590_erp_retry(device, request, irb); 1381 } 1382#endif 1383 1384 sense = (struct tape_3590_sense *) irb->ecw; 1385 1386 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); 1387 1388 /* 1389 * First check all RC-QRCs where we want to do something special 1390 * - "break": basic error recovery is done 1391 * - "goto out:": just print error message if available 1392 */ 1393 rc = -EIO; 1394 switch (sense->rc_rqc) { 1395 1396 case 0x1110: 1397 tape_3590_print_era_msg(device, irb); 1398 return tape_3590_erp_read_buf_log(device, request, irb); 1399 1400 case 0x2011: 1401 tape_3590_print_era_msg(device, irb); 1402 return tape_3590_erp_read_alternate(device, request, irb); 1403 1404 case 0x2230: 1405 case 0x2231: 1406 tape_3590_print_era_msg(device, irb); 1407 return tape_3590_erp_special_interrupt(device, request, irb); 1408 case 0x2240: 1409 return tape_3590_crypt_error(device, request, irb); 1410 1411 case 0x3010: 1412 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", 1413 device->cdev_id); 1414 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1415 case 0x3012: 1416 DBF_EVENT(2, "(%08x): Forward at End of Partition\n", 1417 device->cdev_id); 1418 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1419 case 0x3020: 1420 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); 1421 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1422 1423 case 0x3122: 1424 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", 1425 device->cdev_id); 1426 return tape_3590_erp_basic(device, request, irb, -EIO); 1427 case 0x3123: 1428 DBF_EVENT(2, "(%08x): Rewind Unload complete\n", 1429 device->cdev_id); 1430 tape_med_state_set(device, MS_UNLOADED); 1431 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1432 return tape_3590_erp_basic(device, request, irb, 0); 1433 1434 case 0x4010: 1435 /* 1436 * print additional msg since default msg 1437 * "device intervention" is not very meaningfull 1438 */ 1439 PRINT_WARN("(%s): Tape operation when medium not loaded\n", 1440 device->cdev->dev.bus_id); 1441 tape_med_state_set(device, MS_UNLOADED); 1442 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1443 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1444 case 0x4012: /* Device Long Busy */ 1445 /* XXX: Also use long busy handling here? */ 1446 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); 1447 tape_3590_print_era_msg(device, irb); 1448 return tape_3590_erp_basic(device, request, irb, -EBUSY); 1449 case 0x4014: 1450 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); 1451 return tape_3590_erp_long_busy(device, request, irb); 1452 1453 case 0x5010: 1454 if (sense->rac == 0xd0) { 1455 /* Swap */ 1456 tape_3590_print_era_msg(device, irb); 1457 return tape_3590_erp_swap(device, request, irb); 1458 } 1459 if (sense->rac == 0x26) { 1460 /* Read Opposite */ 1461 tape_3590_print_era_msg(device, irb); 1462 return tape_3590_erp_read_opposite(device, request, 1463 irb); 1464 } 1465 return tape_3590_erp_basic(device, request, irb, -EIO); 1466 case 0x5020: 1467 case 0x5021: 1468 case 0x5022: 1469 case 0x5040: 1470 case 0x5041: 1471 case 0x5042: 1472 tape_3590_print_era_msg(device, irb); 1473 return tape_3590_erp_swap(device, request, irb); 1474 1475 case 0x5110: 1476 case 0x5111: 1477 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1478 1479 case 0x5120: 1480 case 0x1120: 1481 tape_med_state_set(device, MS_UNLOADED); 1482 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1483 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1484 1485 case 0x6020: 1486 PRINT_WARN("(%s): Cartridge of wrong type ?\n", 1487 device->cdev->dev.bus_id); 1488 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1489 1490 case 0x8011: 1491 PRINT_WARN("(%s): Another host has reserved the tape device\n", 1492 device->cdev->dev.bus_id); 1493 return tape_3590_erp_basic(device, request, irb, -EPERM); 1494 case 0x8013: 1495 PRINT_WARN("(%s): Another host has priviliged access to the " 1496 "tape device\n", device->cdev->dev.bus_id); 1497 PRINT_WARN("(%s): To solve the problem unload the current " 1498 "cartridge!\n", device->cdev->dev.bus_id); 1499 return tape_3590_erp_basic(device, request, irb, -EPERM); 1500 default: 1501 return tape_3590_erp_basic(device, request, irb, -EIO); 1502 } 1503} 1504 1505/* 1506 * 3590 interrupt handler: 1507 */ 1508static int 1509tape_3590_irq(struct tape_device *device, struct tape_request *request, 1510 struct irb *irb) 1511{ 1512 if (request == NULL) 1513 return tape_3590_unsolicited_irq(device, irb); 1514 1515 if ((irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) && 1516 (irb->scsw.dstat & DEV_STAT_DEV_END) && (request->op == TO_WRI)) { 1517 /* Write at end of volume */ 1518 DBF_EVENT(2, "End of volume\n"); 1519 return tape_3590_erp_failed(device, request, irb, -ENOSPC); 1520 } 1521 1522 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) 1523 return tape_3590_unit_check(device, request, irb); 1524 1525 if (irb->scsw.dstat & DEV_STAT_DEV_END) { 1526 if (irb->scsw.dstat == DEV_STAT_UNIT_EXCEP) { 1527 if (request->op == TO_FSB || request->op == TO_BSB) 1528 request->rescnt++; 1529 else 1530 DBF_EVENT(5, "Unit Exception!\n"); 1531 } 1532 1533 return tape_3590_done(device, request); 1534 } 1535 1536 if (irb->scsw.dstat & DEV_STAT_CHN_END) { 1537 DBF_EVENT(2, "cannel end\n"); 1538 return TAPE_IO_PENDING; 1539 } 1540 1541 if (irb->scsw.dstat & DEV_STAT_ATTENTION) { 1542 DBF_EVENT(2, "Unit Attention when busy..\n"); 1543 return TAPE_IO_PENDING; 1544 } 1545 1546 DBF_EVENT(6, "xunknownirq\n"); 1547 PRINT_ERR("Unexpected interrupt.\n"); 1548 PRINT_ERR("Current op is: %s", tape_op_verbose[request->op]); 1549 tape_dump_sense(device, request, irb); 1550 return TAPE_IO_STOP; 1551} 1552 1553 1554static int tape_3590_read_dev_chars(struct tape_device *device, 1555 struct tape_3590_rdc_data *rdc_data) 1556{ 1557 int rc; 1558 struct tape_request *request; 1559 1560 request = tape_alloc_request(1, sizeof(*rdc_data)); 1561 if (IS_ERR(request)) 1562 return PTR_ERR(request); 1563 request->op = TO_RDC; 1564 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), 1565 request->cpdata); 1566 rc = tape_do_io(device, request); 1567 if (rc == 0) 1568 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); 1569 tape_free_request(request); 1570 return rc; 1571} 1572 1573/* 1574 * Setup device function 1575 */ 1576static int 1577tape_3590_setup_device(struct tape_device *device) 1578{ 1579 int rc; 1580 struct tape_3590_disc_data *data; 1581 struct tape_3590_rdc_data *rdc_data; 1582 1583 DBF_EVENT(6, "3590 device setup\n"); 1584 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); 1585 if (data == NULL) 1586 return -ENOMEM; 1587 data->read_back_op = READ_PREVIOUS; 1588 device->discdata = data; 1589 1590 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); 1591 if (!rdc_data) { 1592 rc = -ENOMEM; 1593 goto fail_kmalloc; 1594 } 1595 rc = tape_3590_read_dev_chars(device, rdc_data); 1596 if (rc) { 1597 DBF_LH(3, "Read device characteristics failed!\n"); 1598 goto fail_kmalloc; 1599 } 1600 rc = tape_std_assign(device); 1601 if (rc) 1602 goto fail_rdc_data; 1603 if (rdc_data->data[31] == 0x13) { 1604 PRINT_INFO("Device has crypto support\n"); 1605 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; 1606 tape_3592_disable_crypt(device); 1607 } else { 1608 DBF_EVENT(6, "Device has NO crypto support\n"); 1609 } 1610 /* Try to find out if medium is loaded */ 1611 rc = tape_3590_sense_medium(device); 1612 if (rc) { 1613 DBF_LH(3, "3590 medium sense returned %d\n", rc); 1614 goto fail_rdc_data; 1615 } 1616 return 0; 1617 1618fail_rdc_data: 1619 kfree(rdc_data); 1620fail_kmalloc: 1621 kfree(data); 1622 return rc; 1623} 1624 1625/* 1626 * Cleanup device function 1627 */ 1628static void 1629tape_3590_cleanup_device(struct tape_device *device) 1630{ 1631 flush_scheduled_work(); 1632 tape_std_unassign(device); 1633 1634 kfree(device->discdata); 1635 device->discdata = NULL; 1636} 1637 1638/* 1639 * List of 3590 magnetic tape commands. 1640 */ 1641static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { 1642 [MTRESET] = tape_std_mtreset, 1643 [MTFSF] = tape_std_mtfsf, 1644 [MTBSF] = tape_std_mtbsf, 1645 [MTFSR] = tape_std_mtfsr, 1646 [MTBSR] = tape_std_mtbsr, 1647 [MTWEOF] = tape_std_mtweof, 1648 [MTREW] = tape_std_mtrew, 1649 [MTOFFL] = tape_std_mtoffl, 1650 [MTNOP] = tape_std_mtnop, 1651 [MTRETEN] = tape_std_mtreten, 1652 [MTBSFM] = tape_std_mtbsfm, 1653 [MTFSFM] = tape_std_mtfsfm, 1654 [MTEOM] = tape_std_mteom, 1655 [MTERASE] = tape_std_mterase, 1656 [MTRAS1] = NULL, 1657 [MTRAS2] = NULL, 1658 [MTRAS3] = NULL, 1659 [MTSETBLK] = tape_std_mtsetblk, 1660 [MTSETDENSITY] = NULL, 1661 [MTSEEK] = tape_3590_mtseek, 1662 [MTTELL] = tape_3590_mttell, 1663 [MTSETDRVBUFFER] = NULL, 1664 [MTFSS] = NULL, 1665 [MTBSS] = NULL, 1666 [MTWSM] = NULL, 1667 [MTLOCK] = NULL, 1668 [MTUNLOCK] = NULL, 1669 [MTLOAD] = tape_std_mtload, 1670 [MTUNLOAD] = tape_std_mtunload, 1671 [MTCOMPRESSION] = tape_std_mtcompression, 1672 [MTSETPART] = NULL, 1673 [MTMKPART] = NULL 1674}; 1675 1676/* 1677 * Tape discipline structure for 3590. 1678 */ 1679static struct tape_discipline tape_discipline_3590 = { 1680 .owner = THIS_MODULE, 1681 .setup_device = tape_3590_setup_device, 1682 .cleanup_device = tape_3590_cleanup_device, 1683 .process_eov = tape_std_process_eov, 1684 .irq = tape_3590_irq, 1685 .read_block = tape_std_read_block, 1686 .write_block = tape_std_write_block, 1687#ifdef CONFIG_S390_TAPE_BLOCK 1688 .bread = tape_3590_bread, 1689 .free_bread = tape_3590_free_bread, 1690 .check_locate = tape_3590_check_locate, 1691#endif 1692 .ioctl_fn = tape_3590_ioctl, 1693 .mtop_array = tape_3590_mtop 1694}; 1695 1696static struct ccw_device_id tape_3590_ids[] = { 1697 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, 1698 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, 1699 { /* end of list */ } 1700}; 1701 1702static int 1703tape_3590_online(struct ccw_device *cdev) 1704{ 1705 return tape_generic_online(cdev->dev.driver_data, 1706 &tape_discipline_3590); 1707} 1708 1709static int 1710tape_3590_offline(struct ccw_device *cdev) 1711{ 1712 return tape_generic_offline(cdev->dev.driver_data); 1713} 1714 1715static struct ccw_driver tape_3590_driver = { 1716 .name = "tape_3590", 1717 .owner = THIS_MODULE, 1718 .ids = tape_3590_ids, 1719 .probe = tape_generic_probe, 1720 .remove = tape_generic_remove, 1721 .set_offline = tape_3590_offline, 1722 .set_online = tape_3590_online, 1723}; 1724 1725/* 1726 * Setup discipline structure. 1727 */ 1728static int 1729tape_3590_init(void) 1730{ 1731 int rc; 1732 1733 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); 1734 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); 1735#ifdef DBF_LIKE_HELL 1736 debug_set_level(TAPE_DBF_AREA, 6); 1737#endif 1738 1739 DBF_EVENT(3, "3590 init\n"); 1740 /* Register driver for 3590 tapes. */ 1741 rc = ccw_driver_register(&tape_3590_driver); 1742 if (rc) 1743 DBF_EVENT(3, "3590 init failed\n"); 1744 else 1745 DBF_EVENT(3, "3590 registered\n"); 1746 return rc; 1747} 1748 1749static void 1750tape_3590_exit(void) 1751{ 1752 ccw_driver_unregister(&tape_3590_driver); 1753 1754 debug_unregister(TAPE_DBF_AREA); 1755} 1756 1757MODULE_DEVICE_TABLE(ccw, tape_3590_ids); 1758MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); 1759MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); 1760MODULE_LICENSE("GPL"); 1761 1762module_init(tape_3590_init); 1763module_exit(tape_3590_exit); 1764