tape_3590.c revision 2a0217d5c7d22d6dd28f8ae5d20b06d24dc426b8
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; off += TAPEBLOCK_HSEC_SIZE) { 657 ccw->flags = CCW_FLAG_CC; 658 ccw->cmd_code = READ_FORWARD; 659 ccw->count = TAPEBLOCK_HSEC_SIZE; 660 set_normalized_cda(ccw, (void *) __pa(dst)); 661 ccw++; 662 dst += TAPEBLOCK_HSEC_SIZE; 663 } 664 if (off > bv->bv_len) 665 BUG(); 666 } 667 ccw = tape_ccw_end(ccw, NOP, 0, NULL); 668 DBF_EVENT(6, "xBREDccwg\n"); 669 return request; 670} 671 672static void 673tape_3590_free_bread(struct tape_request *request) 674{ 675 struct ccw1 *ccw; 676 677 /* Last ccw is a nop and doesn't need clear_normalized_cda */ 678 for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++) 679 if (ccw->cmd_code == READ_FORWARD) 680 clear_normalized_cda(ccw); 681 tape_free_request(request); 682} 683 684/* 685 * check_locate is called just before the tape request is passed to 686 * the common io layer for execution. It has to check the current 687 * tape position and insert a locate ccw if it doesn't match the 688 * start block for the request. 689 */ 690static void 691tape_3590_check_locate(struct tape_device *device, struct tape_request *request) 692{ 693 __u32 *start_block; 694 695 start_block = (__u32 *) request->cpdata; 696 if (*start_block != device->blk_data.block_position) { 697 /* Add the start offset of the file to get the real block. */ 698 *start_block += device->bof; 699 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 700 } 701} 702#endif 703 704static void tape_3590_med_state_set(struct tape_device *device, 705 struct tape_3590_med_sense *sense) 706{ 707 struct tape390_crypt_info *c_info; 708 709 c_info = &TAPE_3590_CRYPT_INFO(device); 710 711 DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst); 712 switch (sense->macst) { 713 case 0x04: 714 case 0x05: 715 case 0x06: 716 tape_med_state_set(device, MS_UNLOADED); 717 TAPE_3590_CRYPT_INFO(device).medium_status = 0; 718 return; 719 case 0x08: 720 case 0x09: 721 tape_med_state_set(device, MS_LOADED); 722 break; 723 default: 724 tape_med_state_set(device, MS_UNKNOWN); 725 return; 726 } 727 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; 728 if (sense->flags & MSENSE_CRYPT_MASK) { 729 PRINT_INFO("Medium is encrypted (%04x)\n", sense->flags); 730 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK; 731 } else { 732 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags); 733 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK; 734 } 735} 736 737/* 738 * The done handler is called at device/channel end and wakes up the sleeping 739 * process 740 */ 741static int 742tape_3590_done(struct tape_device *device, struct tape_request *request) 743{ 744 struct tape_3590_disc_data *disc_data; 745 746 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); 747 disc_data = device->discdata; 748 749 switch (request->op) { 750 case TO_BSB: 751 case TO_BSF: 752 case TO_DSE: 753 case TO_FSB: 754 case TO_FSF: 755 case TO_LBL: 756 case TO_RFO: 757 case TO_RBA: 758 case TO_REW: 759 case TO_WRI: 760 case TO_WTM: 761 case TO_BLOCK: 762 case TO_LOAD: 763 tape_med_state_set(device, MS_LOADED); 764 break; 765 case TO_RUN: 766 tape_med_state_set(device, MS_UNLOADED); 767 tape_3590_schedule_work(device, TO_CRYPT_OFF); 768 break; 769 case TO_MSEN: 770 tape_3590_med_state_set(device, request->cpdata); 771 break; 772 case TO_CRYPT_ON: 773 TAPE_3590_CRYPT_INFO(device).status 774 |= TAPE390_CRYPT_ON_MASK; 775 *(device->modeset_byte) |= 0x03; 776 break; 777 case TO_CRYPT_OFF: 778 TAPE_3590_CRYPT_INFO(device).status 779 &= ~TAPE390_CRYPT_ON_MASK; 780 *(device->modeset_byte) &= ~0x03; 781 break; 782 case TO_RBI: /* RBI seems to succeed even without medium loaded. */ 783 case TO_NOP: /* Same to NOP. */ 784 case TO_READ_CONFIG: 785 case TO_READ_ATTMSG: 786 case TO_DIS: 787 case TO_ASSIGN: 788 case TO_UNASSIGN: 789 case TO_SIZE: 790 case TO_KEKL_SET: 791 case TO_KEKL_QUERY: 792 case TO_RDC: 793 break; 794 } 795 return TAPE_IO_SUCCESS; 796} 797 798/* 799 * This fuction is called, when error recovery was successfull 800 */ 801static inline int 802tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) 803{ 804 DBF_EVENT(3, "Error Recovery successfull for %s\n", 805 tape_op_verbose[request->op]); 806 return tape_3590_done(device, request); 807} 808 809/* 810 * This fuction is called, when error recovery was not successfull 811 */ 812static inline int 813tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, 814 struct irb *irb, int rc) 815{ 816 DBF_EVENT(3, "Error Recovery failed for %s\n", 817 tape_op_verbose[request->op]); 818 tape_dump_sense_dbf(device, request, irb); 819 return rc; 820} 821 822/* 823 * Error Recovery do retry 824 */ 825static inline int 826tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, 827 struct irb *irb) 828{ 829 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); 830 tape_dump_sense_dbf(device, request, irb); 831 return TAPE_IO_RETRY; 832} 833 834/* 835 * Handle unsolicited interrupts 836 */ 837static int 838tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) 839{ 840 if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END) 841 /* Probably result of halt ssch */ 842 return TAPE_IO_PENDING; 843 else if (irb->scsw.cmd.dstat == 0x85) 844 /* Device Ready */ 845 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); 846 else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 847 tape_3590_schedule_work(device, TO_READ_ATTMSG); 848 } else { 849 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); 850 PRINT_WARN("Unsolicited IRQ (Device End) caught.\n"); 851 tape_dump_sense(device, NULL, irb); 852 } 853 /* check medium state */ 854 tape_3590_schedule_work(device, TO_MSEN); 855 return TAPE_IO_SUCCESS; 856} 857 858/* 859 * Basic Recovery routine 860 */ 861static int 862tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, 863 struct irb *irb, int rc) 864{ 865 struct tape_3590_sense *sense; 866 867 sense = (struct tape_3590_sense *) irb->ecw; 868 869 switch (sense->bra) { 870 case SENSE_BRA_PER: 871 return tape_3590_erp_failed(device, request, irb, rc); 872 case SENSE_BRA_CONT: 873 return tape_3590_erp_succeded(device, request); 874 case SENSE_BRA_RE: 875 return tape_3590_erp_retry(device, request, irb); 876 case SENSE_BRA_DRE: 877 return tape_3590_erp_failed(device, request, irb, rc); 878 default: 879 PRINT_ERR("Unknown BRA %x - This should not happen!\n", 880 sense->bra); 881 BUG(); 882 return TAPE_IO_STOP; 883 } 884} 885 886/* 887 * RDL: Read Device (buffered) log 888 */ 889static int 890tape_3590_erp_read_buf_log(struct tape_device *device, 891 struct tape_request *request, struct irb *irb) 892{ 893 /* 894 * We just do the basic error recovery at the moment (retry). 895 * Perhaps in the future, we read the log and dump it somewhere... 896 */ 897 return tape_3590_erp_basic(device, request, irb, -EIO); 898} 899 900/* 901 * SWAP: Swap Devices 902 */ 903static int 904tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, 905 struct irb *irb) 906{ 907 /* 908 * This error recovery should swap the tapes 909 * if the original has a problem. The operation 910 * should proceed with the new tape... this 911 * should probably be done in user space! 912 */ 913 PRINT_WARN("(%s): Swap Tape Device!\n", dev_name(&device->cdev->dev)); 914 return tape_3590_erp_basic(device, request, irb, -EIO); 915} 916 917/* 918 * LBY: Long Busy 919 */ 920static int 921tape_3590_erp_long_busy(struct tape_device *device, 922 struct tape_request *request, struct irb *irb) 923{ 924 DBF_EVENT(6, "Device is busy\n"); 925 return TAPE_IO_LONG_BUSY; 926} 927 928/* 929 * SPI: Special Intercept 930 */ 931static int 932tape_3590_erp_special_interrupt(struct tape_device *device, 933 struct tape_request *request, struct irb *irb) 934{ 935 return tape_3590_erp_basic(device, request, irb, -EIO); 936} 937 938/* 939 * RDA: Read Alternate 940 */ 941static int 942tape_3590_erp_read_alternate(struct tape_device *device, 943 struct tape_request *request, struct irb *irb) 944{ 945 struct tape_3590_disc_data *data; 946 947 /* 948 * The issued Read Backward or Read Previous command is not 949 * supported by the device 950 * The recovery action should be to issue another command: 951 * Read Revious: if Read Backward is not supported 952 * Read Backward: if Read Previous is not supported 953 */ 954 data = device->discdata; 955 if (data->read_back_op == READ_PREVIOUS) { 956 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", 957 device->cdev_id); 958 data->read_back_op = READ_BACKWARD; 959 } else { 960 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", 961 device->cdev_id); 962 data->read_back_op = READ_PREVIOUS; 963 } 964 tape_3590_read_opposite(device, request); 965 return tape_3590_erp_retry(device, request, irb); 966} 967 968/* 969 * Error Recovery read opposite 970 */ 971static int 972tape_3590_erp_read_opposite(struct tape_device *device, 973 struct tape_request *request, struct irb *irb) 974{ 975 switch (request->op) { 976 case TO_RFO: 977 /* 978 * We did read forward, but the data could not be read. 979 * We will read backward and then skip forward again. 980 */ 981 tape_3590_read_opposite(device, request); 982 return tape_3590_erp_retry(device, request, irb); 983 case TO_RBA: 984 /* We tried to read forward and backward, but hat no success */ 985 return tape_3590_erp_failed(device, request, irb, -EIO); 986 break; 987 default: 988 PRINT_WARN("read_opposite_recovery_called_with_op: %s\n", 989 tape_op_verbose[request->op]); 990 return tape_3590_erp_failed(device, request, irb, -EIO); 991 } 992} 993 994/* 995 * Print an MIM (Media Information Message) (message code f0) 996 */ 997static void 998tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) 999{ 1000 struct tape_3590_sense *sense; 1001 1002 sense = (struct tape_3590_sense *) irb->ecw; 1003 /* Exception Message */ 1004 switch (sense->fmt.f70.emc) { 1005 case 0x02: 1006 PRINT_WARN("(%s): Data degraded\n", 1007 dev_name(&device->cdev->dev)); 1008 break; 1009 case 0x03: 1010 PRINT_WARN("(%s): Data degraded in partion %i\n", 1011 dev_name(&device->cdev->dev), sense->fmt.f70.mp); 1012 break; 1013 case 0x04: 1014 PRINT_WARN("(%s): Medium degraded\n", 1015 dev_name(&device->cdev->dev)); 1016 break; 1017 case 0x05: 1018 PRINT_WARN("(%s): Medium degraded in partition %i\n", 1019 dev_name(&device->cdev->dev), sense->fmt.f70.mp); 1020 break; 1021 case 0x06: 1022 PRINT_WARN("(%s): Block 0 Error\n", 1023 dev_name(&device->cdev->dev)); 1024 break; 1025 case 0x07: 1026 PRINT_WARN("(%s): Medium Exception 0x%02x\n", 1027 dev_name(&device->cdev->dev), sense->fmt.f70.md); 1028 break; 1029 default: 1030 PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n", 1031 dev_name(&device->cdev->dev), sense->fmt.f70.emc); 1032 break; 1033 } 1034 /* Service Message */ 1035 switch (sense->fmt.f70.smc) { 1036 case 0x02: 1037 PRINT_WARN("(%s): Reference Media maintenance procedure %i\n", 1038 dev_name(&device->cdev->dev), sense->fmt.f70.md); 1039 break; 1040 default: 1041 PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n", 1042 dev_name(&device->cdev->dev), sense->fmt.f70.smc); 1043 break; 1044 } 1045} 1046 1047/* 1048 * Print an I/O Subsystem Service Information Message (message code f1) 1049 */ 1050static void 1051tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) 1052{ 1053 struct tape_3590_sense *sense; 1054 1055 sense = (struct tape_3590_sense *) irb->ecw; 1056 /* Exception Message */ 1057 switch (sense->fmt.f71.emc) { 1058 case 0x01: 1059 PRINT_WARN("(%s): Effect of failure is unknown\n", 1060 dev_name(&device->cdev->dev)); 1061 break; 1062 case 0x02: 1063 PRINT_WARN("(%s): CU Exception - no performance impact\n", 1064 dev_name(&device->cdev->dev)); 1065 break; 1066 case 0x03: 1067 PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n", 1068 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]); 1069 break; 1070 case 0x04: 1071 PRINT_WARN("(%s): CU Exception on device path 0x%02x\n", 1072 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]); 1073 break; 1074 case 0x05: 1075 PRINT_WARN("(%s): CU Exception on library path 0x%02x\n", 1076 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]); 1077 break; 1078 case 0x06: 1079 PRINT_WARN("(%s): CU Exception on node 0x%02x\n", 1080 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]); 1081 break; 1082 case 0x07: 1083 PRINT_WARN("(%s): CU Exception on partition 0x%02x\n", 1084 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]); 1085 break; 1086 default: 1087 PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n", 1088 dev_name(&device->cdev->dev), sense->fmt.f71.emc); 1089 } 1090 /* Service Message */ 1091 switch (sense->fmt.f71.smc) { 1092 case 0x01: 1093 PRINT_WARN("(%s): Repair impact is unknown\n", 1094 dev_name(&device->cdev->dev)); 1095 break; 1096 case 0x02: 1097 PRINT_WARN("(%s): Repair will not impact cu performance\n", 1098 dev_name(&device->cdev->dev)); 1099 break; 1100 case 0x03: 1101 if (sense->fmt.f71.mdf == 0) 1102 PRINT_WARN("(%s): Repair will disable node " 1103 "0x%x on CU\n", 1104 dev_name(&device->cdev->dev), 1105 sense->fmt.f71.md[1]); 1106 else 1107 PRINT_WARN("(%s): Repair will disable nodes " 1108 "(0x%x-0x%x) on CU\n", 1109 dev_name(&device->cdev->dev), 1110 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1111 break; 1112 case 0x04: 1113 if (sense->fmt.f71.mdf == 0) 1114 PRINT_WARN("(%s): Repair will disable cannel path " 1115 "0x%x on CU\n", 1116 dev_name(&device->cdev->dev), 1117 sense->fmt.f71.md[1]); 1118 else 1119 PRINT_WARN("(%s): Repair will disable cannel paths " 1120 "(0x%x-0x%x) on CU\n", 1121 dev_name(&device->cdev->dev), 1122 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1123 break; 1124 case 0x05: 1125 if (sense->fmt.f71.mdf == 0) 1126 PRINT_WARN("(%s): Repair will disable device path " 1127 "0x%x on CU\n", 1128 dev_name(&device->cdev->dev), 1129 sense->fmt.f71.md[1]); 1130 else 1131 PRINT_WARN("(%s): Repair will disable device paths " 1132 "(0x%x-0x%x) on CU\n", 1133 dev_name(&device->cdev->dev), 1134 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1135 break; 1136 case 0x06: 1137 if (sense->fmt.f71.mdf == 0) 1138 PRINT_WARN("(%s): Repair will disable library path " 1139 "0x%x on CU\n", 1140 dev_name(&device->cdev->dev), 1141 sense->fmt.f71.md[1]); 1142 else 1143 PRINT_WARN("(%s): Repair will disable library paths " 1144 "(0x%x-0x%x) on CU\n", 1145 dev_name(&device->cdev->dev), 1146 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1147 break; 1148 case 0x07: 1149 PRINT_WARN("(%s): Repair will disable access to CU\n", 1150 dev_name(&device->cdev->dev)); 1151 break; 1152 default: 1153 PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n", 1154 dev_name(&device->cdev->dev), sense->fmt.f71.smc); 1155 } 1156} 1157 1158/* 1159 * Print an Device Subsystem Service Information Message (message code f2) 1160 */ 1161static void 1162tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) 1163{ 1164 struct tape_3590_sense *sense; 1165 1166 sense = (struct tape_3590_sense *) irb->ecw; 1167 /* Exception Message */ 1168 switch (sense->fmt.f71.emc) { 1169 case 0x01: 1170 PRINT_WARN("(%s): Effect of failure is unknown\n", 1171 dev_name(&device->cdev->dev)); 1172 break; 1173 case 0x02: 1174 PRINT_WARN("(%s): DV Exception - no performance impact\n", 1175 dev_name(&device->cdev->dev)); 1176 break; 1177 case 0x03: 1178 PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n", 1179 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]); 1180 break; 1181 case 0x04: 1182 PRINT_WARN("(%s): DV Exception on loader 0x%02x\n", 1183 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]); 1184 break; 1185 case 0x05: 1186 PRINT_WARN("(%s): DV Exception on message display 0x%02x\n", 1187 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]); 1188 break; 1189 case 0x06: 1190 PRINT_WARN("(%s): DV Exception in tape path\n", 1191 dev_name(&device->cdev->dev)); 1192 break; 1193 case 0x07: 1194 PRINT_WARN("(%s): DV Exception in drive\n", 1195 dev_name(&device->cdev->dev)); 1196 break; 1197 default: 1198 PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n", 1199 dev_name(&device->cdev->dev), sense->fmt.f71.emc); 1200 } 1201 /* Service Message */ 1202 switch (sense->fmt.f71.smc) { 1203 case 0x01: 1204 PRINT_WARN("(%s): Repair impact is unknown\n", 1205 dev_name(&device->cdev->dev)); 1206 break; 1207 case 0x02: 1208 PRINT_WARN("(%s): Repair will not impact device performance\n", 1209 dev_name(&device->cdev->dev)); 1210 break; 1211 case 0x03: 1212 if (sense->fmt.f71.mdf == 0) 1213 PRINT_WARN("(%s): Repair will disable channel path " 1214 "0x%x on DV\n", 1215 dev_name(&device->cdev->dev), 1216 sense->fmt.f71.md[1]); 1217 else 1218 PRINT_WARN("(%s): Repair will disable channel path " 1219 "(0x%x-0x%x) on DV\n", 1220 dev_name(&device->cdev->dev), 1221 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1222 break; 1223 case 0x04: 1224 if (sense->fmt.f71.mdf == 0) 1225 PRINT_WARN("(%s): Repair will disable interface 0x%x " 1226 "on DV\n", 1227 dev_name(&device->cdev->dev), 1228 sense->fmt.f71.md[1]); 1229 else 1230 PRINT_WARN("(%s): Repair will disable interfaces " 1231 "(0x%x-0x%x) on DV\n", 1232 dev_name(&device->cdev->dev), 1233 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1234 break; 1235 case 0x05: 1236 if (sense->fmt.f71.mdf == 0) 1237 PRINT_WARN("(%s): Repair will disable loader 0x%x " 1238 "on DV\n", 1239 dev_name(&device->cdev->dev), 1240 sense->fmt.f71.md[1]); 1241 else 1242 PRINT_WARN("(%s): Repair will disable loader " 1243 "(0x%x-0x%x) on DV\n", 1244 dev_name(&device->cdev->dev), 1245 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1246 break; 1247 case 0x07: 1248 PRINT_WARN("(%s): Repair will disable access to DV\n", 1249 dev_name(&device->cdev->dev)); 1250 break; 1251 case 0x08: 1252 if (sense->fmt.f71.mdf == 0) 1253 PRINT_WARN("(%s): Repair will disable message " 1254 "display 0x%x on DV\n", 1255 dev_name(&device->cdev->dev), 1256 sense->fmt.f71.md[1]); 1257 else 1258 PRINT_WARN("(%s): Repair will disable message " 1259 "displays (0x%x-0x%x) on DV\n", 1260 dev_name(&device->cdev->dev), 1261 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1262 break; 1263 case 0x09: 1264 PRINT_WARN("(%s): Clean DV\n", dev_name(&device->cdev->dev)); 1265 break; 1266 default: 1267 PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n", 1268 dev_name(&device->cdev->dev), sense->fmt.f71.smc); 1269 } 1270} 1271 1272/* 1273 * Print standard ERA Message 1274 */ 1275static void 1276tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) 1277{ 1278 struct tape_3590_sense *sense; 1279 1280 sense = (struct tape_3590_sense *) irb->ecw; 1281 if (sense->mc == 0) 1282 return; 1283 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { 1284 if (tape_3590_msg[sense->mc] != NULL) 1285 PRINT_WARN("(%s): %s\n", dev_name(&device->cdev->dev), 1286 tape_3590_msg[sense->mc]); 1287 else { 1288 PRINT_WARN("(%s): Message Code 0x%x\n", 1289 dev_name(&device->cdev->dev), sense->mc); 1290 } 1291 return; 1292 } 1293 if (sense->mc == 0xf0) { 1294 /* Standard Media Information Message */ 1295 PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, " 1296 "RC=%02x-%04x-%02x\n", dev_name(&device->cdev->dev), 1297 sense->fmt.f70.sev, sense->mc, 1298 sense->fmt.f70.emc, sense->fmt.f70.smc, 1299 sense->fmt.f70.refcode, sense->fmt.f70.mid, 1300 sense->fmt.f70.fid); 1301 tape_3590_print_mim_msg_f0(device, irb); 1302 return; 1303 } 1304 if (sense->mc == 0xf1) { 1305 /* Standard I/O Subsystem Service Information Message */ 1306 PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, " 1307 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1308 dev_name(&device->cdev->dev), sense->fmt.f71.sev, 1309 device->cdev->id.dev_model, 1310 sense->mc, sense->fmt.f71.emc, 1311 sense->fmt.f71.smc, sense->fmt.f71.refcode1, 1312 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); 1313 tape_3590_print_io_sim_msg_f1(device, irb); 1314 return; 1315 } 1316 if (sense->mc == 0xf2) { 1317 /* Standard Device Service Information Message */ 1318 PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, " 1319 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1320 dev_name(&device->cdev->dev), sense->fmt.f71.sev, 1321 device->cdev->id.dev_model, 1322 sense->mc, sense->fmt.f71.emc, 1323 sense->fmt.f71.smc, sense->fmt.f71.refcode1, 1324 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); 1325 tape_3590_print_dev_sim_msg_f2(device, irb); 1326 return; 1327 } 1328 if (sense->mc == 0xf3) { 1329 /* Standard Library Service Information Message */ 1330 return; 1331 } 1332 PRINT_WARN("(%s): Device Message(%x)\n", 1333 dev_name(&device->cdev->dev), sense->mc); 1334} 1335 1336static int tape_3590_crypt_error(struct tape_device *device, 1337 struct tape_request *request, struct irb *irb) 1338{ 1339 u8 cu_rc, ekm_rc1; 1340 u16 ekm_rc2; 1341 u32 drv_rc; 1342 const char *bus_id; 1343 char *sense; 1344 1345 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; 1346 bus_id = dev_name(&device->cdev->dev); 1347 cu_rc = sense[0]; 1348 drv_rc = *((u32*) &sense[5]) & 0xffffff; 1349 ekm_rc1 = sense[9]; 1350 ekm_rc2 = *((u16*) &sense[10]); 1351 if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) 1352 /* key not defined on EKM */ 1353 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); 1354 if ((cu_rc == 1) || (cu_rc == 2)) 1355 /* No connection to EKM */ 1356 return tape_3590_erp_basic(device, request, irb, -ENOTCONN); 1357 1358 PRINT_ERR("(%s): Unable to get encryption key from EKM\n", bus_id); 1359 PRINT_ERR("(%s): CU=%02X DRIVE=%06X EKM=%02X:%04X\n", bus_id, cu_rc, 1360 drv_rc, ekm_rc1, ekm_rc2); 1361 1362 return tape_3590_erp_basic(device, request, irb, -ENOKEY); 1363} 1364 1365/* 1366 * 3590 error Recovery routine: 1367 * If possible, it tries to recover from the error. If this is not possible, 1368 * inform the user about the problem. 1369 */ 1370static int 1371tape_3590_unit_check(struct tape_device *device, struct tape_request *request, 1372 struct irb *irb) 1373{ 1374 struct tape_3590_sense *sense; 1375 int rc; 1376 1377#ifdef CONFIG_S390_TAPE_BLOCK 1378 if (request->op == TO_BLOCK) { 1379 /* 1380 * Recovery for block device requests. Set the block_position 1381 * to something invalid and retry. 1382 */ 1383 device->blk_data.block_position = -1; 1384 if (request->retries-- <= 0) 1385 return tape_3590_erp_failed(device, request, irb, -EIO); 1386 else 1387 return tape_3590_erp_retry(device, request, irb); 1388 } 1389#endif 1390 1391 sense = (struct tape_3590_sense *) irb->ecw; 1392 1393 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); 1394 1395 /* 1396 * First check all RC-QRCs where we want to do something special 1397 * - "break": basic error recovery is done 1398 * - "goto out:": just print error message if available 1399 */ 1400 rc = -EIO; 1401 switch (sense->rc_rqc) { 1402 1403 case 0x1110: 1404 tape_3590_print_era_msg(device, irb); 1405 return tape_3590_erp_read_buf_log(device, request, irb); 1406 1407 case 0x2011: 1408 tape_3590_print_era_msg(device, irb); 1409 return tape_3590_erp_read_alternate(device, request, irb); 1410 1411 case 0x2230: 1412 case 0x2231: 1413 tape_3590_print_era_msg(device, irb); 1414 return tape_3590_erp_special_interrupt(device, request, irb); 1415 case 0x2240: 1416 return tape_3590_crypt_error(device, request, irb); 1417 1418 case 0x3010: 1419 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", 1420 device->cdev_id); 1421 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1422 case 0x3012: 1423 DBF_EVENT(2, "(%08x): Forward at End of Partition\n", 1424 device->cdev_id); 1425 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1426 case 0x3020: 1427 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); 1428 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1429 1430 case 0x3122: 1431 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", 1432 device->cdev_id); 1433 return tape_3590_erp_basic(device, request, irb, -EIO); 1434 case 0x3123: 1435 DBF_EVENT(2, "(%08x): Rewind Unload complete\n", 1436 device->cdev_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, 0); 1440 1441 case 0x4010: 1442 /* 1443 * print additional msg since default msg 1444 * "device intervention" is not very meaningfull 1445 */ 1446 PRINT_WARN("(%s): Tape operation when medium not loaded\n", 1447 dev_name(&device->cdev->dev)); 1448 tape_med_state_set(device, MS_UNLOADED); 1449 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1450 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1451 case 0x4012: /* Device Long Busy */ 1452 /* XXX: Also use long busy handling here? */ 1453 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); 1454 tape_3590_print_era_msg(device, irb); 1455 return tape_3590_erp_basic(device, request, irb, -EBUSY); 1456 case 0x4014: 1457 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); 1458 return tape_3590_erp_long_busy(device, request, irb); 1459 1460 case 0x5010: 1461 if (sense->rac == 0xd0) { 1462 /* Swap */ 1463 tape_3590_print_era_msg(device, irb); 1464 return tape_3590_erp_swap(device, request, irb); 1465 } 1466 if (sense->rac == 0x26) { 1467 /* Read Opposite */ 1468 tape_3590_print_era_msg(device, irb); 1469 return tape_3590_erp_read_opposite(device, request, 1470 irb); 1471 } 1472 return tape_3590_erp_basic(device, request, irb, -EIO); 1473 case 0x5020: 1474 case 0x5021: 1475 case 0x5022: 1476 case 0x5040: 1477 case 0x5041: 1478 case 0x5042: 1479 tape_3590_print_era_msg(device, irb); 1480 return tape_3590_erp_swap(device, request, irb); 1481 1482 case 0x5110: 1483 case 0x5111: 1484 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1485 1486 case 0x5120: 1487 case 0x1120: 1488 tape_med_state_set(device, MS_UNLOADED); 1489 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1490 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1491 1492 case 0x6020: 1493 PRINT_WARN("(%s): Cartridge of wrong type ?\n", 1494 dev_name(&device->cdev->dev)); 1495 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1496 1497 case 0x8011: 1498 PRINT_WARN("(%s): Another host has reserved the tape device\n", 1499 dev_name(&device->cdev->dev)); 1500 return tape_3590_erp_basic(device, request, irb, -EPERM); 1501 case 0x8013: 1502 PRINT_WARN("(%s): Another host has privileged access to the " 1503 "tape device\n", dev_name(&device->cdev->dev)); 1504 PRINT_WARN("(%s): To solve the problem unload the current " 1505 "cartridge!\n", dev_name(&device->cdev->dev)); 1506 return tape_3590_erp_basic(device, request, irb, -EPERM); 1507 default: 1508 return tape_3590_erp_basic(device, request, irb, -EIO); 1509 } 1510} 1511 1512/* 1513 * 3590 interrupt handler: 1514 */ 1515static int 1516tape_3590_irq(struct tape_device *device, struct tape_request *request, 1517 struct irb *irb) 1518{ 1519 if (request == NULL) 1520 return tape_3590_unsolicited_irq(device, irb); 1521 1522 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && 1523 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && 1524 (request->op == TO_WRI)) { 1525 /* Write at end of volume */ 1526 DBF_EVENT(2, "End of volume\n"); 1527 return tape_3590_erp_failed(device, request, irb, -ENOSPC); 1528 } 1529 1530 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) 1531 return tape_3590_unit_check(device, request, irb); 1532 1533 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { 1534 if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) { 1535 if (request->op == TO_FSB || request->op == TO_BSB) 1536 request->rescnt++; 1537 else 1538 DBF_EVENT(5, "Unit Exception!\n"); 1539 } 1540 1541 return tape_3590_done(device, request); 1542 } 1543 1544 if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) { 1545 DBF_EVENT(2, "cannel end\n"); 1546 return TAPE_IO_PENDING; 1547 } 1548 1549 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 1550 DBF_EVENT(2, "Unit Attention when busy..\n"); 1551 return TAPE_IO_PENDING; 1552 } 1553 1554 DBF_EVENT(6, "xunknownirq\n"); 1555 PRINT_ERR("Unexpected interrupt.\n"); 1556 PRINT_ERR("Current op is: %s", tape_op_verbose[request->op]); 1557 tape_dump_sense(device, request, irb); 1558 return TAPE_IO_STOP; 1559} 1560 1561 1562static int tape_3590_read_dev_chars(struct tape_device *device, 1563 struct tape_3590_rdc_data *rdc_data) 1564{ 1565 int rc; 1566 struct tape_request *request; 1567 1568 request = tape_alloc_request(1, sizeof(*rdc_data)); 1569 if (IS_ERR(request)) 1570 return PTR_ERR(request); 1571 request->op = TO_RDC; 1572 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), 1573 request->cpdata); 1574 rc = tape_do_io(device, request); 1575 if (rc == 0) 1576 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); 1577 tape_free_request(request); 1578 return rc; 1579} 1580 1581/* 1582 * Setup device function 1583 */ 1584static int 1585tape_3590_setup_device(struct tape_device *device) 1586{ 1587 int rc; 1588 struct tape_3590_disc_data *data; 1589 struct tape_3590_rdc_data *rdc_data; 1590 1591 DBF_EVENT(6, "3590 device setup\n"); 1592 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); 1593 if (data == NULL) 1594 return -ENOMEM; 1595 data->read_back_op = READ_PREVIOUS; 1596 device->discdata = data; 1597 1598 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); 1599 if (!rdc_data) { 1600 rc = -ENOMEM; 1601 goto fail_kmalloc; 1602 } 1603 rc = tape_3590_read_dev_chars(device, rdc_data); 1604 if (rc) { 1605 DBF_LH(3, "Read device characteristics failed!\n"); 1606 goto fail_rdc_data; 1607 } 1608 rc = tape_std_assign(device); 1609 if (rc) 1610 goto fail_rdc_data; 1611 if (rdc_data->data[31] == 0x13) { 1612 PRINT_INFO("Device has crypto support\n"); 1613 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; 1614 tape_3592_disable_crypt(device); 1615 } else { 1616 DBF_EVENT(6, "Device has NO crypto support\n"); 1617 } 1618 /* Try to find out if medium is loaded */ 1619 rc = tape_3590_sense_medium(device); 1620 if (rc) { 1621 DBF_LH(3, "3590 medium sense returned %d\n", rc); 1622 goto fail_rdc_data; 1623 } 1624 return 0; 1625 1626fail_rdc_data: 1627 kfree(rdc_data); 1628fail_kmalloc: 1629 kfree(data); 1630 return rc; 1631} 1632 1633/* 1634 * Cleanup device function 1635 */ 1636static void 1637tape_3590_cleanup_device(struct tape_device *device) 1638{ 1639 flush_scheduled_work(); 1640 tape_std_unassign(device); 1641 1642 kfree(device->discdata); 1643 device->discdata = NULL; 1644} 1645 1646/* 1647 * List of 3590 magnetic tape commands. 1648 */ 1649static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { 1650 [MTRESET] = tape_std_mtreset, 1651 [MTFSF] = tape_std_mtfsf, 1652 [MTBSF] = tape_std_mtbsf, 1653 [MTFSR] = tape_std_mtfsr, 1654 [MTBSR] = tape_std_mtbsr, 1655 [MTWEOF] = tape_std_mtweof, 1656 [MTREW] = tape_std_mtrew, 1657 [MTOFFL] = tape_std_mtoffl, 1658 [MTNOP] = tape_std_mtnop, 1659 [MTRETEN] = tape_std_mtreten, 1660 [MTBSFM] = tape_std_mtbsfm, 1661 [MTFSFM] = tape_std_mtfsfm, 1662 [MTEOM] = tape_std_mteom, 1663 [MTERASE] = tape_std_mterase, 1664 [MTRAS1] = NULL, 1665 [MTRAS2] = NULL, 1666 [MTRAS3] = NULL, 1667 [MTSETBLK] = tape_std_mtsetblk, 1668 [MTSETDENSITY] = NULL, 1669 [MTSEEK] = tape_3590_mtseek, 1670 [MTTELL] = tape_3590_mttell, 1671 [MTSETDRVBUFFER] = NULL, 1672 [MTFSS] = NULL, 1673 [MTBSS] = NULL, 1674 [MTWSM] = NULL, 1675 [MTLOCK] = NULL, 1676 [MTUNLOCK] = NULL, 1677 [MTLOAD] = tape_std_mtload, 1678 [MTUNLOAD] = tape_std_mtunload, 1679 [MTCOMPRESSION] = tape_std_mtcompression, 1680 [MTSETPART] = NULL, 1681 [MTMKPART] = NULL 1682}; 1683 1684/* 1685 * Tape discipline structure for 3590. 1686 */ 1687static struct tape_discipline tape_discipline_3590 = { 1688 .owner = THIS_MODULE, 1689 .setup_device = tape_3590_setup_device, 1690 .cleanup_device = tape_3590_cleanup_device, 1691 .process_eov = tape_std_process_eov, 1692 .irq = tape_3590_irq, 1693 .read_block = tape_std_read_block, 1694 .write_block = tape_std_write_block, 1695#ifdef CONFIG_S390_TAPE_BLOCK 1696 .bread = tape_3590_bread, 1697 .free_bread = tape_3590_free_bread, 1698 .check_locate = tape_3590_check_locate, 1699#endif 1700 .ioctl_fn = tape_3590_ioctl, 1701 .mtop_array = tape_3590_mtop 1702}; 1703 1704static struct ccw_device_id tape_3590_ids[] = { 1705 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, 1706 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, 1707 { /* end of list */ } 1708}; 1709 1710static int 1711tape_3590_online(struct ccw_device *cdev) 1712{ 1713 return tape_generic_online(cdev->dev.driver_data, 1714 &tape_discipline_3590); 1715} 1716 1717static int 1718tape_3590_offline(struct ccw_device *cdev) 1719{ 1720 return tape_generic_offline(cdev->dev.driver_data); 1721} 1722 1723static struct ccw_driver tape_3590_driver = { 1724 .name = "tape_3590", 1725 .owner = THIS_MODULE, 1726 .ids = tape_3590_ids, 1727 .probe = tape_generic_probe, 1728 .remove = tape_generic_remove, 1729 .set_offline = tape_3590_offline, 1730 .set_online = tape_3590_online, 1731}; 1732 1733/* 1734 * Setup discipline structure. 1735 */ 1736static int 1737tape_3590_init(void) 1738{ 1739 int rc; 1740 1741 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); 1742 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); 1743#ifdef DBF_LIKE_HELL 1744 debug_set_level(TAPE_DBF_AREA, 6); 1745#endif 1746 1747 DBF_EVENT(3, "3590 init\n"); 1748 /* Register driver for 3590 tapes. */ 1749 rc = ccw_driver_register(&tape_3590_driver); 1750 if (rc) 1751 DBF_EVENT(3, "3590 init failed\n"); 1752 else 1753 DBF_EVENT(3, "3590 registered\n"); 1754 return rc; 1755} 1756 1757static void 1758tape_3590_exit(void) 1759{ 1760 ccw_driver_unregister(&tape_3590_driver); 1761 1762 debug_unregister(TAPE_DBF_AREA); 1763} 1764 1765MODULE_DEVICE_TABLE(ccw, tape_3590_ids); 1766MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); 1767MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); 1768MODULE_LICENSE("GPL"); 1769 1770module_init(tape_3590_init); 1771module_exit(tape_3590_exit); 1772