tape_3590.c revision 5705f7021748a69d84d6567e68e8851dab551464
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; 627 unsigned off; 628 char *dst; 629 struct bio_vec *bv; 630 struct req_iterator iter; 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_segment(bv, req, iter) 637 count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9); 638 639 request = tape_alloc_request(2 + count + 1, 4); 640 if (IS_ERR(request)) 641 return request; 642 request->op = TO_BLOCK; 643 *(__u32 *) request->cpdata = start_block; 644 ccw = request->cpaddr; 645 ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte); 646 647 /* 648 * We always setup a nop after the mode set ccw. This slot is 649 * used in tape_std_check_locate to insert a locate ccw if the 650 * current tape position doesn't match the start block to be read. 651 */ 652 ccw = tape_ccw_cc(ccw, NOP, 0, NULL); 653 654 rq_for_each_segment(bv, req, iter) { 655 dst = page_address(bv->bv_page) + bv->bv_offset; 656 for (off = 0; off < bv->bv_len; 657 off += TAPEBLOCK_HSEC_SIZE) { 658 ccw->flags = CCW_FLAG_CC; 659 ccw->cmd_code = READ_FORWARD; 660 ccw->count = TAPEBLOCK_HSEC_SIZE; 661 set_normalized_cda(ccw, (void *) __pa(dst)); 662 ccw++; 663 dst += TAPEBLOCK_HSEC_SIZE; 664 } 665 if (off > bv->bv_len) 666 BUG(); 667 } 668 ccw = tape_ccw_end(ccw, NOP, 0, NULL); 669 DBF_EVENT(6, "xBREDccwg\n"); 670 return request; 671} 672 673static void 674tape_3590_free_bread(struct tape_request *request) 675{ 676 struct ccw1 *ccw; 677 678 /* Last ccw is a nop and doesn't need clear_normalized_cda */ 679 for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++) 680 if (ccw->cmd_code == READ_FORWARD) 681 clear_normalized_cda(ccw); 682 tape_free_request(request); 683} 684 685/* 686 * check_locate is called just before the tape request is passed to 687 * the common io layer for execution. It has to check the current 688 * tape position and insert a locate ccw if it doesn't match the 689 * start block for the request. 690 */ 691static void 692tape_3590_check_locate(struct tape_device *device, struct tape_request *request) 693{ 694 __u32 *start_block; 695 696 start_block = (__u32 *) request->cpdata; 697 if (*start_block != device->blk_data.block_position) { 698 /* Add the start offset of the file to get the real block. */ 699 *start_block += device->bof; 700 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 701 } 702} 703#endif 704 705static void tape_3590_med_state_set(struct tape_device *device, 706 struct tape_3590_med_sense *sense) 707{ 708 struct tape390_crypt_info *c_info; 709 710 c_info = &TAPE_3590_CRYPT_INFO(device); 711 712 if (sense->masst == MSENSE_UNASSOCIATED) { 713 tape_med_state_set(device, MS_UNLOADED); 714 TAPE_3590_CRYPT_INFO(device).medium_status = 0; 715 return; 716 } 717 if (sense->masst != MSENSE_ASSOCIATED_MOUNT) { 718 PRINT_ERR("Unknown medium state: %x\n", sense->masst); 719 return; 720 } 721 tape_med_state_set(device, MS_LOADED); 722 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; 723 if (sense->flags & MSENSE_CRYPT_MASK) { 724 PRINT_INFO("Medium is encrypted (%04x)\n", sense->flags); 725 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK; 726 } else { 727 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags); 728 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK; 729 } 730} 731 732/* 733 * The done handler is called at device/channel end and wakes up the sleeping 734 * process 735 */ 736static int 737tape_3590_done(struct tape_device *device, struct tape_request *request) 738{ 739 struct tape_3590_disc_data *disc_data; 740 741 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); 742 disc_data = device->discdata; 743 744 switch (request->op) { 745 case TO_BSB: 746 case TO_BSF: 747 case TO_DSE: 748 case TO_FSB: 749 case TO_FSF: 750 case TO_LBL: 751 case TO_RFO: 752 case TO_RBA: 753 case TO_REW: 754 case TO_WRI: 755 case TO_WTM: 756 case TO_BLOCK: 757 case TO_LOAD: 758 tape_med_state_set(device, MS_LOADED); 759 break; 760 case TO_RUN: 761 tape_med_state_set(device, MS_UNLOADED); 762 tape_3590_schedule_work(device, TO_CRYPT_OFF); 763 break; 764 case TO_MSEN: 765 tape_3590_med_state_set(device, request->cpdata); 766 break; 767 case TO_CRYPT_ON: 768 TAPE_3590_CRYPT_INFO(device).status 769 |= TAPE390_CRYPT_ON_MASK; 770 *(device->modeset_byte) |= 0x03; 771 break; 772 case TO_CRYPT_OFF: 773 TAPE_3590_CRYPT_INFO(device).status 774 &= ~TAPE390_CRYPT_ON_MASK; 775 *(device->modeset_byte) &= ~0x03; 776 break; 777 case TO_RBI: /* RBI seems to succeed even without medium loaded. */ 778 case TO_NOP: /* Same to NOP. */ 779 case TO_READ_CONFIG: 780 case TO_READ_ATTMSG: 781 case TO_DIS: 782 case TO_ASSIGN: 783 case TO_UNASSIGN: 784 case TO_SIZE: 785 case TO_KEKL_SET: 786 case TO_KEKL_QUERY: 787 case TO_RDC: 788 break; 789 } 790 return TAPE_IO_SUCCESS; 791} 792 793/* 794 * This fuction is called, when error recovery was successfull 795 */ 796static inline int 797tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) 798{ 799 DBF_EVENT(3, "Error Recovery successfull for %s\n", 800 tape_op_verbose[request->op]); 801 return tape_3590_done(device, request); 802} 803 804/* 805 * This fuction is called, when error recovery was not successfull 806 */ 807static inline int 808tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, 809 struct irb *irb, int rc) 810{ 811 DBF_EVENT(3, "Error Recovery failed for %s\n", 812 tape_op_verbose[request->op]); 813 tape_dump_sense_dbf(device, request, irb); 814 return rc; 815} 816 817/* 818 * Error Recovery do retry 819 */ 820static inline int 821tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, 822 struct irb *irb) 823{ 824 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); 825 tape_dump_sense_dbf(device, request, irb); 826 return TAPE_IO_RETRY; 827} 828 829/* 830 * Handle unsolicited interrupts 831 */ 832static int 833tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) 834{ 835 if (irb->scsw.dstat == DEV_STAT_CHN_END) 836 /* Probably result of halt ssch */ 837 return TAPE_IO_PENDING; 838 else if (irb->scsw.dstat == 0x85) 839 /* Device Ready -> check medium state */ 840 tape_3590_schedule_work(device, TO_MSEN); 841 else if (irb->scsw.dstat & DEV_STAT_ATTENTION) 842 tape_3590_schedule_work(device, TO_READ_ATTMSG); 843 else { 844 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); 845 PRINT_WARN("Unsolicited IRQ (Device End) caught.\n"); 846 tape_dump_sense(device, NULL, irb); 847 } 848 return TAPE_IO_SUCCESS; 849} 850 851/* 852 * Basic Recovery routine 853 */ 854static int 855tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, 856 struct irb *irb, int rc) 857{ 858 struct tape_3590_sense *sense; 859 860 sense = (struct tape_3590_sense *) irb->ecw; 861 862 switch (sense->bra) { 863 case SENSE_BRA_PER: 864 return tape_3590_erp_failed(device, request, irb, rc); 865 case SENSE_BRA_CONT: 866 return tape_3590_erp_succeded(device, request); 867 case SENSE_BRA_RE: 868 return tape_3590_erp_retry(device, request, irb); 869 case SENSE_BRA_DRE: 870 return tape_3590_erp_failed(device, request, irb, rc); 871 default: 872 PRINT_ERR("Unknown BRA %x - This should not happen!\n", 873 sense->bra); 874 BUG(); 875 return TAPE_IO_STOP; 876 } 877} 878 879/* 880 * RDL: Read Device (buffered) log 881 */ 882static int 883tape_3590_erp_read_buf_log(struct tape_device *device, 884 struct tape_request *request, struct irb *irb) 885{ 886 /* 887 * We just do the basic error recovery at the moment (retry). 888 * Perhaps in the future, we read the log and dump it somewhere... 889 */ 890 return tape_3590_erp_basic(device, request, irb, -EIO); 891} 892 893/* 894 * SWAP: Swap Devices 895 */ 896static int 897tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, 898 struct irb *irb) 899{ 900 /* 901 * This error recovery should swap the tapes 902 * if the original has a problem. The operation 903 * should proceed with the new tape... this 904 * should probably be done in user space! 905 */ 906 PRINT_WARN("(%s): Swap Tape Device!\n", device->cdev->dev.bus_id); 907 return tape_3590_erp_basic(device, request, irb, -EIO); 908} 909 910/* 911 * LBY: Long Busy 912 */ 913static int 914tape_3590_erp_long_busy(struct tape_device *device, 915 struct tape_request *request, struct irb *irb) 916{ 917 DBF_EVENT(6, "Device is busy\n"); 918 return TAPE_IO_LONG_BUSY; 919} 920 921/* 922 * SPI: Special Intercept 923 */ 924static int 925tape_3590_erp_special_interrupt(struct tape_device *device, 926 struct tape_request *request, struct irb *irb) 927{ 928 return tape_3590_erp_basic(device, request, irb, -EIO); 929} 930 931/* 932 * RDA: Read Alternate 933 */ 934static int 935tape_3590_erp_read_alternate(struct tape_device *device, 936 struct tape_request *request, struct irb *irb) 937{ 938 struct tape_3590_disc_data *data; 939 940 /* 941 * The issued Read Backward or Read Previous command is not 942 * supported by the device 943 * The recovery action should be to issue another command: 944 * Read Revious: if Read Backward is not supported 945 * Read Backward: if Read Previous is not supported 946 */ 947 data = device->discdata; 948 if (data->read_back_op == READ_PREVIOUS) { 949 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", 950 device->cdev_id); 951 data->read_back_op = READ_BACKWARD; 952 } else { 953 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", 954 device->cdev_id); 955 data->read_back_op = READ_PREVIOUS; 956 } 957 tape_3590_read_opposite(device, request); 958 return tape_3590_erp_retry(device, request, irb); 959} 960 961/* 962 * Error Recovery read opposite 963 */ 964static int 965tape_3590_erp_read_opposite(struct tape_device *device, 966 struct tape_request *request, struct irb *irb) 967{ 968 switch (request->op) { 969 case TO_RFO: 970 /* 971 * We did read forward, but the data could not be read. 972 * We will read backward and then skip forward again. 973 */ 974 tape_3590_read_opposite(device, request); 975 return tape_3590_erp_retry(device, request, irb); 976 case TO_RBA: 977 /* We tried to read forward and backward, but hat no success */ 978 return tape_3590_erp_failed(device, request, irb, -EIO); 979 break; 980 default: 981 PRINT_WARN("read_opposite_recovery_called_with_op: %s\n", 982 tape_op_verbose[request->op]); 983 return tape_3590_erp_failed(device, request, irb, -EIO); 984 } 985} 986 987/* 988 * Print an MIM (Media Information Message) (message code f0) 989 */ 990static void 991tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) 992{ 993 struct tape_3590_sense *sense; 994 995 sense = (struct tape_3590_sense *) irb->ecw; 996 /* Exception Message */ 997 switch (sense->fmt.f70.emc) { 998 case 0x02: 999 PRINT_WARN("(%s): Data degraded\n", device->cdev->dev.bus_id); 1000 break; 1001 case 0x03: 1002 PRINT_WARN("(%s): Data degraded in partion %i\n", 1003 device->cdev->dev.bus_id, sense->fmt.f70.mp); 1004 break; 1005 case 0x04: 1006 PRINT_WARN("(%s): Medium degraded\n", device->cdev->dev.bus_id); 1007 break; 1008 case 0x05: 1009 PRINT_WARN("(%s): Medium degraded in partition %i\n", 1010 device->cdev->dev.bus_id, sense->fmt.f70.mp); 1011 break; 1012 case 0x06: 1013 PRINT_WARN("(%s): Block 0 Error\n", device->cdev->dev.bus_id); 1014 break; 1015 case 0x07: 1016 PRINT_WARN("(%s): Medium Exception 0x%02x\n", 1017 device->cdev->dev.bus_id, sense->fmt.f70.md); 1018 break; 1019 default: 1020 PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n", 1021 device->cdev->dev.bus_id, sense->fmt.f70.emc); 1022 break; 1023 } 1024 /* Service Message */ 1025 switch (sense->fmt.f70.smc) { 1026 case 0x02: 1027 PRINT_WARN("(%s): Reference Media maintenance procedure %i\n", 1028 device->cdev->dev.bus_id, sense->fmt.f70.md); 1029 break; 1030 default: 1031 PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n", 1032 device->cdev->dev.bus_id, sense->fmt.f70.smc); 1033 break; 1034 } 1035} 1036 1037/* 1038 * Print an I/O Subsystem Service Information Message (message code f1) 1039 */ 1040static void 1041tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) 1042{ 1043 struct tape_3590_sense *sense; 1044 1045 sense = (struct tape_3590_sense *) irb->ecw; 1046 /* Exception Message */ 1047 switch (sense->fmt.f71.emc) { 1048 case 0x01: 1049 PRINT_WARN("(%s): Effect of failure is unknown\n", 1050 device->cdev->dev.bus_id); 1051 break; 1052 case 0x02: 1053 PRINT_WARN("(%s): CU Exception - no performance impact\n", 1054 device->cdev->dev.bus_id); 1055 break; 1056 case 0x03: 1057 PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n", 1058 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1059 break; 1060 case 0x04: 1061 PRINT_WARN("(%s): CU Exception on device path 0x%02x\n", 1062 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1063 break; 1064 case 0x05: 1065 PRINT_WARN("(%s): CU Exception on library path 0x%02x\n", 1066 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1067 break; 1068 case 0x06: 1069 PRINT_WARN("(%s): CU Exception on node 0x%02x\n", 1070 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1071 break; 1072 case 0x07: 1073 PRINT_WARN("(%s): CU Exception on partition 0x%02x\n", 1074 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1075 break; 1076 default: 1077 PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n", 1078 device->cdev->dev.bus_id, sense->fmt.f71.emc); 1079 } 1080 /* Service Message */ 1081 switch (sense->fmt.f71.smc) { 1082 case 0x01: 1083 PRINT_WARN("(%s): Repair impact is unknown\n", 1084 device->cdev->dev.bus_id); 1085 break; 1086 case 0x02: 1087 PRINT_WARN("(%s): Repair will not impact cu performance\n", 1088 device->cdev->dev.bus_id); 1089 break; 1090 case 0x03: 1091 if (sense->fmt.f71.mdf == 0) 1092 PRINT_WARN("(%s): Repair will disable node " 1093 "0x%x on CU\n", 1094 device->cdev->dev.bus_id, 1095 sense->fmt.f71.md[1]); 1096 else 1097 PRINT_WARN("(%s): Repair will disable nodes " 1098 "(0x%x-0x%x) on CU\n", 1099 device->cdev->dev.bus_id, 1100 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1101 break; 1102 case 0x04: 1103 if (sense->fmt.f71.mdf == 0) 1104 PRINT_WARN("(%s): Repair will disable cannel path " 1105 "0x%x on CU\n", 1106 device->cdev->dev.bus_id, 1107 sense->fmt.f71.md[1]); 1108 else 1109 PRINT_WARN("(%s): Repair will disable cannel paths " 1110 "(0x%x-0x%x) on CU\n", 1111 device->cdev->dev.bus_id, 1112 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1113 break; 1114 case 0x05: 1115 if (sense->fmt.f71.mdf == 0) 1116 PRINT_WARN("(%s): Repair will disable device path " 1117 "0x%x on CU\n", 1118 device->cdev->dev.bus_id, 1119 sense->fmt.f71.md[1]); 1120 else 1121 PRINT_WARN("(%s): Repair will disable device paths " 1122 "(0x%x-0x%x) on CU\n", 1123 device->cdev->dev.bus_id, 1124 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1125 break; 1126 case 0x06: 1127 if (sense->fmt.f71.mdf == 0) 1128 PRINT_WARN("(%s): Repair will disable library path " 1129 "0x%x on CU\n", 1130 device->cdev->dev.bus_id, 1131 sense->fmt.f71.md[1]); 1132 else 1133 PRINT_WARN("(%s): Repair will disable library paths " 1134 "(0x%x-0x%x) on CU\n", 1135 device->cdev->dev.bus_id, 1136 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1137 break; 1138 case 0x07: 1139 PRINT_WARN("(%s): Repair will disable access to CU\n", 1140 device->cdev->dev.bus_id); 1141 break; 1142 default: 1143 PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n", 1144 device->cdev->dev.bus_id, sense->fmt.f71.smc); 1145 } 1146} 1147 1148/* 1149 * Print an Device Subsystem Service Information Message (message code f2) 1150 */ 1151static void 1152tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) 1153{ 1154 struct tape_3590_sense *sense; 1155 1156 sense = (struct tape_3590_sense *) irb->ecw; 1157 /* Exception Message */ 1158 switch (sense->fmt.f71.emc) { 1159 case 0x01: 1160 PRINT_WARN("(%s): Effect of failure is unknown\n", 1161 device->cdev->dev.bus_id); 1162 break; 1163 case 0x02: 1164 PRINT_WARN("(%s): DV Exception - no performance impact\n", 1165 device->cdev->dev.bus_id); 1166 break; 1167 case 0x03: 1168 PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n", 1169 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1170 break; 1171 case 0x04: 1172 PRINT_WARN("(%s): DV Exception on loader 0x%02x\n", 1173 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1174 break; 1175 case 0x05: 1176 PRINT_WARN("(%s): DV Exception on message display 0x%02x\n", 1177 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1178 break; 1179 case 0x06: 1180 PRINT_WARN("(%s): DV Exception in tape path\n", 1181 device->cdev->dev.bus_id); 1182 break; 1183 case 0x07: 1184 PRINT_WARN("(%s): DV Exception in drive\n", 1185 device->cdev->dev.bus_id); 1186 break; 1187 default: 1188 PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n", 1189 device->cdev->dev.bus_id, sense->fmt.f71.emc); 1190 } 1191 /* Service Message */ 1192 switch (sense->fmt.f71.smc) { 1193 case 0x01: 1194 PRINT_WARN("(%s): Repair impact is unknown\n", 1195 device->cdev->dev.bus_id); 1196 break; 1197 case 0x02: 1198 PRINT_WARN("(%s): Repair will not impact device performance\n", 1199 device->cdev->dev.bus_id); 1200 break; 1201 case 0x03: 1202 if (sense->fmt.f71.mdf == 0) 1203 PRINT_WARN("(%s): Repair will disable channel path " 1204 "0x%x on DV\n", 1205 device->cdev->dev.bus_id, 1206 sense->fmt.f71.md[1]); 1207 else 1208 PRINT_WARN("(%s): Repair will disable channel path " 1209 "(0x%x-0x%x) on DV\n", 1210 device->cdev->dev.bus_id, 1211 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1212 break; 1213 case 0x04: 1214 if (sense->fmt.f71.mdf == 0) 1215 PRINT_WARN("(%s): Repair will disable interface 0x%x " 1216 "on DV\n", 1217 device->cdev->dev.bus_id, 1218 sense->fmt.f71.md[1]); 1219 else 1220 PRINT_WARN("(%s): Repair will disable interfaces " 1221 "(0x%x-0x%x) on DV\n", 1222 device->cdev->dev.bus_id, 1223 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1224 break; 1225 case 0x05: 1226 if (sense->fmt.f71.mdf == 0) 1227 PRINT_WARN("(%s): Repair will disable loader 0x%x " 1228 "on DV\n", 1229 device->cdev->dev.bus_id, 1230 sense->fmt.f71.md[1]); 1231 else 1232 PRINT_WARN("(%s): Repair will disable loader " 1233 "(0x%x-0x%x) on DV\n", 1234 device->cdev->dev.bus_id, 1235 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1236 break; 1237 case 0x07: 1238 PRINT_WARN("(%s): Repair will disable access to DV\n", 1239 device->cdev->dev.bus_id); 1240 break; 1241 case 0x08: 1242 if (sense->fmt.f71.mdf == 0) 1243 PRINT_WARN("(%s): Repair will disable message " 1244 "display 0x%x on DV\n", 1245 device->cdev->dev.bus_id, 1246 sense->fmt.f71.md[1]); 1247 else 1248 PRINT_WARN("(%s): Repair will disable message " 1249 "displays (0x%x-0x%x) on DV\n", 1250 device->cdev->dev.bus_id, 1251 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1252 break; 1253 case 0x09: 1254 PRINT_WARN("(%s): Clean DV\n", device->cdev->dev.bus_id); 1255 break; 1256 default: 1257 PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n", 1258 device->cdev->dev.bus_id, sense->fmt.f71.smc); 1259 } 1260} 1261 1262/* 1263 * Print standard ERA Message 1264 */ 1265static void 1266tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) 1267{ 1268 struct tape_3590_sense *sense; 1269 1270 sense = (struct tape_3590_sense *) irb->ecw; 1271 if (sense->mc == 0) 1272 return; 1273 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { 1274 if (tape_3590_msg[sense->mc] != NULL) 1275 PRINT_WARN("(%s): %s\n", device->cdev->dev.bus_id, 1276 tape_3590_msg[sense->mc]); 1277 else { 1278 PRINT_WARN("(%s): Message Code 0x%x\n", 1279 device->cdev->dev.bus_id, sense->mc); 1280 } 1281 return; 1282 } 1283 if (sense->mc == 0xf0) { 1284 /* Standard Media Information Message */ 1285 PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, " 1286 "RC=%02x-%04x-%02x\n", device->cdev->dev.bus_id, 1287 sense->fmt.f70.sev, sense->mc, 1288 sense->fmt.f70.emc, sense->fmt.f70.smc, 1289 sense->fmt.f70.refcode, sense->fmt.f70.mid, 1290 sense->fmt.f70.fid); 1291 tape_3590_print_mim_msg_f0(device, irb); 1292 return; 1293 } 1294 if (sense->mc == 0xf1) { 1295 /* Standard I/O Subsystem Service Information Message */ 1296 PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, " 1297 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1298 device->cdev->dev.bus_id, sense->fmt.f71.sev, 1299 device->cdev->id.dev_model, 1300 sense->mc, sense->fmt.f71.emc, 1301 sense->fmt.f71.smc, sense->fmt.f71.refcode1, 1302 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); 1303 tape_3590_print_io_sim_msg_f1(device, irb); 1304 return; 1305 } 1306 if (sense->mc == 0xf2) { 1307 /* Standard Device Service Information Message */ 1308 PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, " 1309 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1310 device->cdev->dev.bus_id, sense->fmt.f71.sev, 1311 device->cdev->id.dev_model, 1312 sense->mc, sense->fmt.f71.emc, 1313 sense->fmt.f71.smc, sense->fmt.f71.refcode1, 1314 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); 1315 tape_3590_print_dev_sim_msg_f2(device, irb); 1316 return; 1317 } 1318 if (sense->mc == 0xf3) { 1319 /* Standard Library Service Information Message */ 1320 return; 1321 } 1322 PRINT_WARN("(%s): Device Message(%x)\n", 1323 device->cdev->dev.bus_id, sense->mc); 1324} 1325 1326static int tape_3590_crypt_error(struct tape_device *device, 1327 struct tape_request *request, struct irb *irb) 1328{ 1329 u8 cu_rc, ekm_rc1; 1330 u16 ekm_rc2; 1331 u32 drv_rc; 1332 char *bus_id, *sense; 1333 1334 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; 1335 bus_id = device->cdev->dev.bus_id; 1336 cu_rc = sense[0]; 1337 drv_rc = *((u32*) &sense[5]) & 0xffffff; 1338 ekm_rc1 = sense[9]; 1339 ekm_rc2 = *((u16*) &sense[10]); 1340 if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) 1341 /* key not defined on EKM */ 1342 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); 1343 if ((cu_rc == 1) || (cu_rc == 2)) 1344 /* No connection to EKM */ 1345 return tape_3590_erp_basic(device, request, irb, -ENOTCONN); 1346 1347 PRINT_ERR("(%s): Unable to get encryption key from EKM\n", bus_id); 1348 PRINT_ERR("(%s): CU=%02X DRIVE=%06X EKM=%02X:%04X\n", bus_id, cu_rc, 1349 drv_rc, ekm_rc1, ekm_rc2); 1350 1351 return tape_3590_erp_basic(device, request, irb, -ENOKEY); 1352} 1353 1354/* 1355 * 3590 error Recovery routine: 1356 * If possible, it tries to recover from the error. If this is not possible, 1357 * inform the user about the problem. 1358 */ 1359static int 1360tape_3590_unit_check(struct tape_device *device, struct tape_request *request, 1361 struct irb *irb) 1362{ 1363 struct tape_3590_sense *sense; 1364 int rc; 1365 1366#ifdef CONFIG_S390_TAPE_BLOCK 1367 if (request->op == TO_BLOCK) { 1368 /* 1369 * Recovery for block device requests. Set the block_position 1370 * to something invalid and retry. 1371 */ 1372 device->blk_data.block_position = -1; 1373 if (request->retries-- <= 0) 1374 return tape_3590_erp_failed(device, request, irb, -EIO); 1375 else 1376 return tape_3590_erp_retry(device, request, irb); 1377 } 1378#endif 1379 1380 sense = (struct tape_3590_sense *) irb->ecw; 1381 1382 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); 1383 1384 /* 1385 * First check all RC-QRCs where we want to do something special 1386 * - "break": basic error recovery is done 1387 * - "goto out:": just print error message if available 1388 */ 1389 rc = -EIO; 1390 switch (sense->rc_rqc) { 1391 1392 case 0x1110: 1393 tape_3590_print_era_msg(device, irb); 1394 return tape_3590_erp_read_buf_log(device, request, irb); 1395 1396 case 0x2011: 1397 tape_3590_print_era_msg(device, irb); 1398 return tape_3590_erp_read_alternate(device, request, irb); 1399 1400 case 0x2230: 1401 case 0x2231: 1402 tape_3590_print_era_msg(device, irb); 1403 return tape_3590_erp_special_interrupt(device, request, irb); 1404 case 0x2240: 1405 return tape_3590_crypt_error(device, request, irb); 1406 1407 case 0x3010: 1408 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", 1409 device->cdev_id); 1410 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1411 case 0x3012: 1412 DBF_EVENT(2, "(%08x): Forward at End of Partition\n", 1413 device->cdev_id); 1414 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1415 case 0x3020: 1416 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); 1417 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1418 1419 case 0x3122: 1420 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", 1421 device->cdev_id); 1422 return tape_3590_erp_basic(device, request, irb, -EIO); 1423 case 0x3123: 1424 DBF_EVENT(2, "(%08x): Rewind Unload complete\n", 1425 device->cdev_id); 1426 tape_med_state_set(device, MS_UNLOADED); 1427 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1428 return tape_3590_erp_basic(device, request, irb, 0); 1429 1430 case 0x4010: 1431 /* 1432 * print additional msg since default msg 1433 * "device intervention" is not very meaningfull 1434 */ 1435 PRINT_WARN("(%s): Tape operation when medium not loaded\n", 1436 device->cdev->dev.bus_id); 1437 tape_med_state_set(device, MS_UNLOADED); 1438 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1439 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1440 case 0x4012: /* Device Long Busy */ 1441 /* XXX: Also use long busy handling here? */ 1442 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); 1443 tape_3590_print_era_msg(device, irb); 1444 return tape_3590_erp_basic(device, request, irb, -EBUSY); 1445 case 0x4014: 1446 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); 1447 return tape_3590_erp_long_busy(device, request, irb); 1448 1449 case 0x5010: 1450 if (sense->rac == 0xd0) { 1451 /* Swap */ 1452 tape_3590_print_era_msg(device, irb); 1453 return tape_3590_erp_swap(device, request, irb); 1454 } 1455 if (sense->rac == 0x26) { 1456 /* Read Opposite */ 1457 tape_3590_print_era_msg(device, irb); 1458 return tape_3590_erp_read_opposite(device, request, 1459 irb); 1460 } 1461 return tape_3590_erp_basic(device, request, irb, -EIO); 1462 case 0x5020: 1463 case 0x5021: 1464 case 0x5022: 1465 case 0x5040: 1466 case 0x5041: 1467 case 0x5042: 1468 tape_3590_print_era_msg(device, irb); 1469 return tape_3590_erp_swap(device, request, irb); 1470 1471 case 0x5110: 1472 case 0x5111: 1473 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1474 1475 case 0x5120: 1476 case 0x1120: 1477 tape_med_state_set(device, MS_UNLOADED); 1478 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1479 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1480 1481 case 0x6020: 1482 PRINT_WARN("(%s): Cartridge of wrong type ?\n", 1483 device->cdev->dev.bus_id); 1484 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1485 1486 case 0x8011: 1487 PRINT_WARN("(%s): Another host has reserved the tape device\n", 1488 device->cdev->dev.bus_id); 1489 return tape_3590_erp_basic(device, request, irb, -EPERM); 1490 case 0x8013: 1491 PRINT_WARN("(%s): Another host has priviliged access to the " 1492 "tape device\n", device->cdev->dev.bus_id); 1493 PRINT_WARN("(%s): To solve the problem unload the current " 1494 "cartridge!\n", device->cdev->dev.bus_id); 1495 return tape_3590_erp_basic(device, request, irb, -EPERM); 1496 default: 1497 return tape_3590_erp_basic(device, request, irb, -EIO); 1498 } 1499} 1500 1501/* 1502 * 3590 interrupt handler: 1503 */ 1504static int 1505tape_3590_irq(struct tape_device *device, struct tape_request *request, 1506 struct irb *irb) 1507{ 1508 if (request == NULL) 1509 return tape_3590_unsolicited_irq(device, irb); 1510 1511 if ((irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) && 1512 (irb->scsw.dstat & DEV_STAT_DEV_END) && (request->op == TO_WRI)) { 1513 /* Write at end of volume */ 1514 DBF_EVENT(2, "End of volume\n"); 1515 return tape_3590_erp_failed(device, request, irb, -ENOSPC); 1516 } 1517 1518 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) 1519 return tape_3590_unit_check(device, request, irb); 1520 1521 if (irb->scsw.dstat & DEV_STAT_DEV_END) { 1522 if (irb->scsw.dstat == DEV_STAT_UNIT_EXCEP) { 1523 if (request->op == TO_FSB || request->op == TO_BSB) 1524 request->rescnt++; 1525 else 1526 DBF_EVENT(5, "Unit Exception!\n"); 1527 } 1528 1529 return tape_3590_done(device, request); 1530 } 1531 1532 if (irb->scsw.dstat & DEV_STAT_CHN_END) { 1533 DBF_EVENT(2, "cannel end\n"); 1534 return TAPE_IO_PENDING; 1535 } 1536 1537 if (irb->scsw.dstat & DEV_STAT_ATTENTION) { 1538 DBF_EVENT(2, "Unit Attention when busy..\n"); 1539 return TAPE_IO_PENDING; 1540 } 1541 1542 DBF_EVENT(6, "xunknownirq\n"); 1543 PRINT_ERR("Unexpected interrupt.\n"); 1544 PRINT_ERR("Current op is: %s", tape_op_verbose[request->op]); 1545 tape_dump_sense(device, request, irb); 1546 return TAPE_IO_STOP; 1547} 1548 1549 1550static int tape_3590_read_dev_chars(struct tape_device *device, 1551 struct tape_3590_rdc_data *rdc_data) 1552{ 1553 int rc; 1554 struct tape_request *request; 1555 1556 request = tape_alloc_request(1, sizeof(*rdc_data)); 1557 if (IS_ERR(request)) 1558 return PTR_ERR(request); 1559 request->op = TO_RDC; 1560 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), 1561 request->cpdata); 1562 rc = tape_do_io(device, request); 1563 if (rc == 0) 1564 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); 1565 tape_free_request(request); 1566 return rc; 1567} 1568 1569/* 1570 * Setup device function 1571 */ 1572static int 1573tape_3590_setup_device(struct tape_device *device) 1574{ 1575 int rc; 1576 struct tape_3590_disc_data *data; 1577 struct tape_3590_rdc_data *rdc_data; 1578 1579 DBF_EVENT(6, "3590 device setup\n"); 1580 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); 1581 if (data == NULL) 1582 return -ENOMEM; 1583 data->read_back_op = READ_PREVIOUS; 1584 device->discdata = data; 1585 1586 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); 1587 if (!rdc_data) { 1588 rc = -ENOMEM; 1589 goto fail_kmalloc; 1590 } 1591 rc = tape_3590_read_dev_chars(device, rdc_data); 1592 if (rc) { 1593 DBF_LH(3, "Read device characteristics failed!\n"); 1594 goto fail_kmalloc; 1595 } 1596 rc = tape_std_assign(device); 1597 if (rc) 1598 goto fail_rdc_data; 1599 if (rdc_data->data[31] == 0x13) { 1600 PRINT_INFO("Device has crypto support\n"); 1601 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; 1602 tape_3592_disable_crypt(device); 1603 } else { 1604 DBF_EVENT(6, "Device has NO crypto support\n"); 1605 } 1606 /* Try to find out if medium is loaded */ 1607 rc = tape_3590_sense_medium(device); 1608 if (rc) { 1609 DBF_LH(3, "3590 medium sense returned %d\n", rc); 1610 goto fail_rdc_data; 1611 } 1612 return 0; 1613 1614fail_rdc_data: 1615 kfree(rdc_data); 1616fail_kmalloc: 1617 kfree(data); 1618 return rc; 1619} 1620 1621/* 1622 * Cleanup device function 1623 */ 1624static void 1625tape_3590_cleanup_device(struct tape_device *device) 1626{ 1627 flush_scheduled_work(); 1628 tape_std_unassign(device); 1629 1630 kfree(device->discdata); 1631 device->discdata = NULL; 1632} 1633 1634/* 1635 * List of 3590 magnetic tape commands. 1636 */ 1637static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { 1638 [MTRESET] = tape_std_mtreset, 1639 [MTFSF] = tape_std_mtfsf, 1640 [MTBSF] = tape_std_mtbsf, 1641 [MTFSR] = tape_std_mtfsr, 1642 [MTBSR] = tape_std_mtbsr, 1643 [MTWEOF] = tape_std_mtweof, 1644 [MTREW] = tape_std_mtrew, 1645 [MTOFFL] = tape_std_mtoffl, 1646 [MTNOP] = tape_std_mtnop, 1647 [MTRETEN] = tape_std_mtreten, 1648 [MTBSFM] = tape_std_mtbsfm, 1649 [MTFSFM] = tape_std_mtfsfm, 1650 [MTEOM] = tape_std_mteom, 1651 [MTERASE] = tape_std_mterase, 1652 [MTRAS1] = NULL, 1653 [MTRAS2] = NULL, 1654 [MTRAS3] = NULL, 1655 [MTSETBLK] = tape_std_mtsetblk, 1656 [MTSETDENSITY] = NULL, 1657 [MTSEEK] = tape_3590_mtseek, 1658 [MTTELL] = tape_3590_mttell, 1659 [MTSETDRVBUFFER] = NULL, 1660 [MTFSS] = NULL, 1661 [MTBSS] = NULL, 1662 [MTWSM] = NULL, 1663 [MTLOCK] = NULL, 1664 [MTUNLOCK] = NULL, 1665 [MTLOAD] = tape_std_mtload, 1666 [MTUNLOAD] = tape_std_mtunload, 1667 [MTCOMPRESSION] = tape_std_mtcompression, 1668 [MTSETPART] = NULL, 1669 [MTMKPART] = NULL 1670}; 1671 1672/* 1673 * Tape discipline structure for 3590. 1674 */ 1675static struct tape_discipline tape_discipline_3590 = { 1676 .owner = THIS_MODULE, 1677 .setup_device = tape_3590_setup_device, 1678 .cleanup_device = tape_3590_cleanup_device, 1679 .process_eov = tape_std_process_eov, 1680 .irq = tape_3590_irq, 1681 .read_block = tape_std_read_block, 1682 .write_block = tape_std_write_block, 1683#ifdef CONFIG_S390_TAPE_BLOCK 1684 .bread = tape_3590_bread, 1685 .free_bread = tape_3590_free_bread, 1686 .check_locate = tape_3590_check_locate, 1687#endif 1688 .ioctl_fn = tape_3590_ioctl, 1689 .mtop_array = tape_3590_mtop 1690}; 1691 1692static struct ccw_device_id tape_3590_ids[] = { 1693 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, 1694 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, 1695 { /* end of list */ } 1696}; 1697 1698static int 1699tape_3590_online(struct ccw_device *cdev) 1700{ 1701 return tape_generic_online(cdev->dev.driver_data, 1702 &tape_discipline_3590); 1703} 1704 1705static int 1706tape_3590_offline(struct ccw_device *cdev) 1707{ 1708 return tape_generic_offline(cdev->dev.driver_data); 1709} 1710 1711static struct ccw_driver tape_3590_driver = { 1712 .name = "tape_3590", 1713 .owner = THIS_MODULE, 1714 .ids = tape_3590_ids, 1715 .probe = tape_generic_probe, 1716 .remove = tape_generic_remove, 1717 .set_offline = tape_3590_offline, 1718 .set_online = tape_3590_online, 1719}; 1720 1721/* 1722 * Setup discipline structure. 1723 */ 1724static int 1725tape_3590_init(void) 1726{ 1727 int rc; 1728 1729 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); 1730 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); 1731#ifdef DBF_LIKE_HELL 1732 debug_set_level(TAPE_DBF_AREA, 6); 1733#endif 1734 1735 DBF_EVENT(3, "3590 init\n"); 1736 /* Register driver for 3590 tapes. */ 1737 rc = ccw_driver_register(&tape_3590_driver); 1738 if (rc) 1739 DBF_EVENT(3, "3590 init failed\n"); 1740 else 1741 DBF_EVENT(3, "3590 registered\n"); 1742 return rc; 1743} 1744 1745static void 1746tape_3590_exit(void) 1747{ 1748 ccw_driver_unregister(&tape_3590_driver); 1749 1750 debug_unregister(TAPE_DBF_AREA); 1751} 1752 1753MODULE_DEVICE_TABLE(ccw, tape_3590_ids); 1754MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); 1755MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); 1756MODULE_LICENSE("GPL"); 1757 1758module_init(tape_3590_init); 1759module_exit(tape_3590_exit); 1760