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 */ 25 debug_info_t *TAPE_DBF_AREA = NULL; 26 EXPORT_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 41 static 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 98 static int crypt_supported(struct tape_device *device) 99 { 100 return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device)); 101 } 102 103 static int crypt_enabled(struct tape_device *device) 104 { 105 return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device)); 106 } 107 108 static 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 } 123 124 static 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 } 140 141 static 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 } 161 162 static 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; 177 invalid: 178 return -EINVAL; 179 } 180 181 static 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; 189 invalid: 190 return -EINVAL; 191 } 192 193 /* 194 * Query KEKLs 195 */ 196 static 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; 227 fail_request: 228 tape_free_request(request); 229 fail_malloc: 230 kfree(int_kekls); 231 return rc; 232 } 233 234 /* 235 * IOCTL: Query KEKLs 236 */ 237 static 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; 259 fail: 260 kfree(ext_kekls); 261 return rc; 262 } 263 264 static int tape_3590_mttell(struct tape_device *device, int mt_count); 265 266 /* 267 * Set KEKLs 268 */ 269 static 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 */ 300 static 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); 319 out: 320 kfree(ext_kekls); 321 return rc; 322 } 323 324 /* 325 * Enable encryption 326 */ 327 static 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 */ 358 static 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 */ 387 static 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 } 404 405 static int tape_3590_sense_medium(struct tape_device *device); 406 407 /* 408 * IOCTL: Query enryption status 409 */ 410 static 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 */ 427 static int 428 tape_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 */ 455 static int 456 tape_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 */ 471 static int 472 tape_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 */ 486 static int 487 tape_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 */ 507 static void 508 tape_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 */ 544 static int 545 tape_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 */ 567 struct work_handler_data { 568 struct tape_device *device; 569 enum tape_op op; 570 struct work_struct work; 571 }; 572 573 static void 574 tape_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 } 599 600 static int 601 tape_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 */ 621 static struct tape_request * 622 tape_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 } 671 672 static void 673 tape_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 */ 690 static void 691 tape_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 703 704 static 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 */ 741 static int 742 tape_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 */ 801 static inline int 802 tape_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 */ 812 static inline int 813 tape_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 */ 825 static inline int 826 tape_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 */ 837 static int 838 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) 839 { 840 if (irb->scsw.dstat == DEV_STAT_CHN_END) 841 /* Probably result of halt ssch */ 842 return TAPE_IO_PENDING; 843 else if (irb->scsw.dstat == 0x85) 844 /* Device Ready */ 845 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); 846 else if (irb->scsw.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 */ 861 static int 862 tape_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 */ 889 static int 890 tape_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 */ 903 static int 904 tape_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", device->cdev->dev.bus_id); 914 return tape_3590_erp_basic(device, request, irb, -EIO); 915 } 916 917 /* 918 * LBY: Long Busy 919 */ 920 static int 921 tape_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 */ 931 static int 932 tape_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 */ 941 static int 942 tape_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 */ 971 static int 972 tape_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 */ 997 static void 998 tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) 999 { 1000 struct tape_3590_sense *sense; 1001 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", device->cdev->dev.bus_id); 1007 break; 1008 case 0x03: 1009 PRINT_WARN("(%s): Data degraded in partion %i\n", 1010 device->cdev->dev.bus_id, sense->fmt.f70.mp); 1011 break; 1012 case 0x04: 1013 PRINT_WARN("(%s): Medium degraded\n", device->cdev->dev.bus_id); 1014 break; 1015 case 0x05: 1016 PRINT_WARN("(%s): Medium degraded in partition %i\n", 1017 device->cdev->dev.bus_id, sense->fmt.f70.mp); 1018 break; 1019 case 0x06: 1020 PRINT_WARN("(%s): Block 0 Error\n", device->cdev->dev.bus_id); 1021 break; 1022 case 0x07: 1023 PRINT_WARN("(%s): Medium Exception 0x%02x\n", 1024 device->cdev->dev.bus_id, sense->fmt.f70.md); 1025 break; 1026 default: 1027 PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n", 1028 device->cdev->dev.bus_id, sense->fmt.f70.emc); 1029 break; 1030 } 1031 /* Service Message */ 1032 switch (sense->fmt.f70.smc) { 1033 case 0x02: 1034 PRINT_WARN("(%s): Reference Media maintenance procedure %i\n", 1035 device->cdev->dev.bus_id, sense->fmt.f70.md); 1036 break; 1037 default: 1038 PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n", 1039 device->cdev->dev.bus_id, sense->fmt.f70.smc); 1040 break; 1041 } 1042 } 1043 1044 /* 1045 * Print an I/O Subsystem Service Information Message (message code f1) 1046 */ 1047 static void 1048 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) 1049 { 1050 struct tape_3590_sense *sense; 1051 1052 sense = (struct tape_3590_sense *) irb->ecw; 1053 /* Exception Message */ 1054 switch (sense->fmt.f71.emc) { 1055 case 0x01: 1056 PRINT_WARN("(%s): Effect of failure is unknown\n", 1057 device->cdev->dev.bus_id); 1058 break; 1059 case 0x02: 1060 PRINT_WARN("(%s): CU Exception - no performance impact\n", 1061 device->cdev->dev.bus_id); 1062 break; 1063 case 0x03: 1064 PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n", 1065 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1066 break; 1067 case 0x04: 1068 PRINT_WARN("(%s): CU Exception on device path 0x%02x\n", 1069 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1070 break; 1071 case 0x05: 1072 PRINT_WARN("(%s): CU Exception on library path 0x%02x\n", 1073 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1074 break; 1075 case 0x06: 1076 PRINT_WARN("(%s): CU Exception on node 0x%02x\n", 1077 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1078 break; 1079 case 0x07: 1080 PRINT_WARN("(%s): CU Exception on partition 0x%02x\n", 1081 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1082 break; 1083 default: 1084 PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n", 1085 device->cdev->dev.bus_id, sense->fmt.f71.emc); 1086 } 1087 /* Service Message */ 1088 switch (sense->fmt.f71.smc) { 1089 case 0x01: 1090 PRINT_WARN("(%s): Repair impact is unknown\n", 1091 device->cdev->dev.bus_id); 1092 break; 1093 case 0x02: 1094 PRINT_WARN("(%s): Repair will not impact cu performance\n", 1095 device->cdev->dev.bus_id); 1096 break; 1097 case 0x03: 1098 if (sense->fmt.f71.mdf == 0) 1099 PRINT_WARN("(%s): Repair will disable node " 1100 "0x%x on CU\n", 1101 device->cdev->dev.bus_id, 1102 sense->fmt.f71.md[1]); 1103 else 1104 PRINT_WARN("(%s): Repair will disable nodes " 1105 "(0x%x-0x%x) on CU\n", 1106 device->cdev->dev.bus_id, 1107 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1108 break; 1109 case 0x04: 1110 if (sense->fmt.f71.mdf == 0) 1111 PRINT_WARN("(%s): Repair will disable cannel path " 1112 "0x%x on CU\n", 1113 device->cdev->dev.bus_id, 1114 sense->fmt.f71.md[1]); 1115 else 1116 PRINT_WARN("(%s): Repair will disable cannel paths " 1117 "(0x%x-0x%x) on CU\n", 1118 device->cdev->dev.bus_id, 1119 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1120 break; 1121 case 0x05: 1122 if (sense->fmt.f71.mdf == 0) 1123 PRINT_WARN("(%s): Repair will disable device path " 1124 "0x%x on CU\n", 1125 device->cdev->dev.bus_id, 1126 sense->fmt.f71.md[1]); 1127 else 1128 PRINT_WARN("(%s): Repair will disable device paths " 1129 "(0x%x-0x%x) on CU\n", 1130 device->cdev->dev.bus_id, 1131 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1132 break; 1133 case 0x06: 1134 if (sense->fmt.f71.mdf == 0) 1135 PRINT_WARN("(%s): Repair will disable library path " 1136 "0x%x on CU\n", 1137 device->cdev->dev.bus_id, 1138 sense->fmt.f71.md[1]); 1139 else 1140 PRINT_WARN("(%s): Repair will disable library paths " 1141 "(0x%x-0x%x) on CU\n", 1142 device->cdev->dev.bus_id, 1143 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1144 break; 1145 case 0x07: 1146 PRINT_WARN("(%s): Repair will disable access to CU\n", 1147 device->cdev->dev.bus_id); 1148 break; 1149 default: 1150 PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n", 1151 device->cdev->dev.bus_id, sense->fmt.f71.smc); 1152 } 1153 } 1154 1155 /* 1156 * Print an Device Subsystem Service Information Message (message code f2) 1157 */ 1158 static void 1159 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) 1160 { 1161 struct tape_3590_sense *sense; 1162 1163 sense = (struct tape_3590_sense *) irb->ecw; 1164 /* Exception Message */ 1165 switch (sense->fmt.f71.emc) { 1166 case 0x01: 1167 PRINT_WARN("(%s): Effect of failure is unknown\n", 1168 device->cdev->dev.bus_id); 1169 break; 1170 case 0x02: 1171 PRINT_WARN("(%s): DV Exception - no performance impact\n", 1172 device->cdev->dev.bus_id); 1173 break; 1174 case 0x03: 1175 PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n", 1176 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1177 break; 1178 case 0x04: 1179 PRINT_WARN("(%s): DV Exception on loader 0x%02x\n", 1180 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1181 break; 1182 case 0x05: 1183 PRINT_WARN("(%s): DV Exception on message display 0x%02x\n", 1184 device->cdev->dev.bus_id, sense->fmt.f71.md[0]); 1185 break; 1186 case 0x06: 1187 PRINT_WARN("(%s): DV Exception in tape path\n", 1188 device->cdev->dev.bus_id); 1189 break; 1190 case 0x07: 1191 PRINT_WARN("(%s): DV Exception in drive\n", 1192 device->cdev->dev.bus_id); 1193 break; 1194 default: 1195 PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n", 1196 device->cdev->dev.bus_id, sense->fmt.f71.emc); 1197 } 1198 /* Service Message */ 1199 switch (sense->fmt.f71.smc) { 1200 case 0x01: 1201 PRINT_WARN("(%s): Repair impact is unknown\n", 1202 device->cdev->dev.bus_id); 1203 break; 1204 case 0x02: 1205 PRINT_WARN("(%s): Repair will not impact device performance\n", 1206 device->cdev->dev.bus_id); 1207 break; 1208 case 0x03: 1209 if (sense->fmt.f71.mdf == 0) 1210 PRINT_WARN("(%s): Repair will disable channel path " 1211 "0x%x on DV\n", 1212 device->cdev->dev.bus_id, 1213 sense->fmt.f71.md[1]); 1214 else 1215 PRINT_WARN("(%s): Repair will disable channel path " 1216 "(0x%x-0x%x) on DV\n", 1217 device->cdev->dev.bus_id, 1218 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1219 break; 1220 case 0x04: 1221 if (sense->fmt.f71.mdf == 0) 1222 PRINT_WARN("(%s): Repair will disable interface 0x%x " 1223 "on DV\n", 1224 device->cdev->dev.bus_id, 1225 sense->fmt.f71.md[1]); 1226 else 1227 PRINT_WARN("(%s): Repair will disable interfaces " 1228 "(0x%x-0x%x) on DV\n", 1229 device->cdev->dev.bus_id, 1230 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1231 break; 1232 case 0x05: 1233 if (sense->fmt.f71.mdf == 0) 1234 PRINT_WARN("(%s): Repair will disable loader 0x%x " 1235 "on DV\n", 1236 device->cdev->dev.bus_id, 1237 sense->fmt.f71.md[1]); 1238 else 1239 PRINT_WARN("(%s): Repair will disable loader " 1240 "(0x%x-0x%x) on DV\n", 1241 device->cdev->dev.bus_id, 1242 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1243 break; 1244 case 0x07: 1245 PRINT_WARN("(%s): Repair will disable access to DV\n", 1246 device->cdev->dev.bus_id); 1247 break; 1248 case 0x08: 1249 if (sense->fmt.f71.mdf == 0) 1250 PRINT_WARN("(%s): Repair will disable message " 1251 "display 0x%x on DV\n", 1252 device->cdev->dev.bus_id, 1253 sense->fmt.f71.md[1]); 1254 else 1255 PRINT_WARN("(%s): Repair will disable message " 1256 "displays (0x%x-0x%x) on DV\n", 1257 device->cdev->dev.bus_id, 1258 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1259 break; 1260 case 0x09: 1261 PRINT_WARN("(%s): Clean DV\n", device->cdev->dev.bus_id); 1262 break; 1263 default: 1264 PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n", 1265 device->cdev->dev.bus_id, sense->fmt.f71.smc); 1266 } 1267 } 1268 1269 /* 1270 * Print standard ERA Message 1271 */ 1272 static void 1273 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) 1274 { 1275 struct tape_3590_sense *sense; 1276 1277 sense = (struct tape_3590_sense *) irb->ecw; 1278 if (sense->mc == 0) 1279 return; 1280 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { 1281 if (tape_3590_msg[sense->mc] != NULL) 1282 PRINT_WARN("(%s): %s\n", device->cdev->dev.bus_id, 1283 tape_3590_msg[sense->mc]); 1284 else { 1285 PRINT_WARN("(%s): Message Code 0x%x\n", 1286 device->cdev->dev.bus_id, sense->mc); 1287 } 1288 return; 1289 } 1290 if (sense->mc == 0xf0) { 1291 /* Standard Media Information Message */ 1292 PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, " 1293 "RC=%02x-%04x-%02x\n", device->cdev->dev.bus_id, 1294 sense->fmt.f70.sev, sense->mc, 1295 sense->fmt.f70.emc, sense->fmt.f70.smc, 1296 sense->fmt.f70.refcode, sense->fmt.f70.mid, 1297 sense->fmt.f70.fid); 1298 tape_3590_print_mim_msg_f0(device, irb); 1299 return; 1300 } 1301 if (sense->mc == 0xf1) { 1302 /* Standard I/O Subsystem Service Information Message */ 1303 PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, " 1304 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1305 device->cdev->dev.bus_id, sense->fmt.f71.sev, 1306 device->cdev->id.dev_model, 1307 sense->mc, sense->fmt.f71.emc, 1308 sense->fmt.f71.smc, sense->fmt.f71.refcode1, 1309 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); 1310 tape_3590_print_io_sim_msg_f1(device, irb); 1311 return; 1312 } 1313 if (sense->mc == 0xf2) { 1314 /* Standard Device Service Information Message */ 1315 PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, " 1316 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1317 device->cdev->dev.bus_id, sense->fmt.f71.sev, 1318 device->cdev->id.dev_model, 1319 sense->mc, sense->fmt.f71.emc, 1320 sense->fmt.f71.smc, sense->fmt.f71.refcode1, 1321 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); 1322 tape_3590_print_dev_sim_msg_f2(device, irb); 1323 return; 1324 } 1325 if (sense->mc == 0xf3) { 1326 /* Standard Library Service Information Message */ 1327 return; 1328 } 1329 PRINT_WARN("(%s): Device Message(%x)\n", 1330 device->cdev->dev.bus_id, sense->mc); 1331 } 1332 1333 static int tape_3590_crypt_error(struct tape_device *device, 1334 struct tape_request *request, struct irb *irb) 1335 { 1336 u8 cu_rc, ekm_rc1; 1337 u16 ekm_rc2; 1338 u32 drv_rc; 1339 char *bus_id, *sense; 1340 1341 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; 1342 bus_id = device->cdev->dev.bus_id; 1343 cu_rc = sense[0]; 1344 drv_rc = *((u32*) &sense[5]) & 0xffffff; 1345 ekm_rc1 = sense[9]; 1346 ekm_rc2 = *((u16*) &sense[10]); 1347 if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) 1348 /* key not defined on EKM */ 1349 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); 1350 if ((cu_rc == 1) || (cu_rc == 2)) 1351 /* No connection to EKM */ 1352 return tape_3590_erp_basic(device, request, irb, -ENOTCONN); 1353 1354 PRINT_ERR("(%s): Unable to get encryption key from EKM\n", bus_id); 1355 PRINT_ERR("(%s): CU=%02X DRIVE=%06X EKM=%02X:%04X\n", bus_id, cu_rc, 1356 drv_rc, ekm_rc1, ekm_rc2); 1357 1358 return tape_3590_erp_basic(device, request, irb, -ENOKEY); 1359 } 1360 1361 /* 1362 * 3590 error Recovery routine: 1363 * If possible, it tries to recover from the error. If this is not possible, 1364 * inform the user about the problem. 1365 */ 1366 static int 1367 tape_3590_unit_check(struct tape_device *device, struct tape_request *request, 1368 struct irb *irb) 1369 { 1370 struct tape_3590_sense *sense; 1371 int rc; 1372 1373 #ifdef CONFIG_S390_TAPE_BLOCK 1374 if (request->op == TO_BLOCK) { 1375 /* 1376 * Recovery for block device requests. Set the block_position 1377 * to something invalid and retry. 1378 */ 1379 device->blk_data.block_position = -1; 1380 if (request->retries-- <= 0) 1381 return tape_3590_erp_failed(device, request, irb, -EIO); 1382 else 1383 return tape_3590_erp_retry(device, request, irb); 1384 } 1385 #endif 1386 1387 sense = (struct tape_3590_sense *) irb->ecw; 1388 1389 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); 1390 1391 /* 1392 * First check all RC-QRCs where we want to do something special 1393 * - "break": basic error recovery is done 1394 * - "goto out:": just print error message if available 1395 */ 1396 rc = -EIO; 1397 switch (sense->rc_rqc) { 1398 1399 case 0x1110: 1400 tape_3590_print_era_msg(device, irb); 1401 return tape_3590_erp_read_buf_log(device, request, irb); 1402 1403 case 0x2011: 1404 tape_3590_print_era_msg(device, irb); 1405 return tape_3590_erp_read_alternate(device, request, irb); 1406 1407 case 0x2230: 1408 case 0x2231: 1409 tape_3590_print_era_msg(device, irb); 1410 return tape_3590_erp_special_interrupt(device, request, irb); 1411 case 0x2240: 1412 return tape_3590_crypt_error(device, request, irb); 1413 1414 case 0x3010: 1415 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", 1416 device->cdev_id); 1417 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1418 case 0x3012: 1419 DBF_EVENT(2, "(%08x): Forward at End of Partition\n", 1420 device->cdev_id); 1421 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1422 case 0x3020: 1423 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); 1424 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1425 1426 case 0x3122: 1427 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", 1428 device->cdev_id); 1429 return tape_3590_erp_basic(device, request, irb, -EIO); 1430 case 0x3123: 1431 DBF_EVENT(2, "(%08x): Rewind Unload complete\n", 1432 device->cdev_id); 1433 tape_med_state_set(device, MS_UNLOADED); 1434 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1435 return tape_3590_erp_basic(device, request, irb, 0); 1436 1437 case 0x4010: 1438 /* 1439 * print additional msg since default msg 1440 * "device intervention" is not very meaningfull 1441 */ 1442 PRINT_WARN("(%s): Tape operation when medium not loaded\n", 1443 device->cdev->dev.bus_id); 1444 tape_med_state_set(device, MS_UNLOADED); 1445 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1446 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1447 case 0x4012: /* Device Long Busy */ 1448 /* XXX: Also use long busy handling here? */ 1449 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); 1450 tape_3590_print_era_msg(device, irb); 1451 return tape_3590_erp_basic(device, request, irb, -EBUSY); 1452 case 0x4014: 1453 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); 1454 return tape_3590_erp_long_busy(device, request, irb); 1455 1456 case 0x5010: 1457 if (sense->rac == 0xd0) { 1458 /* Swap */ 1459 tape_3590_print_era_msg(device, irb); 1460 return tape_3590_erp_swap(device, request, irb); 1461 } 1462 if (sense->rac == 0x26) { 1463 /* Read Opposite */ 1464 tape_3590_print_era_msg(device, irb); 1465 return tape_3590_erp_read_opposite(device, request, 1466 irb); 1467 } 1468 return tape_3590_erp_basic(device, request, irb, -EIO); 1469 case 0x5020: 1470 case 0x5021: 1471 case 0x5022: 1472 case 0x5040: 1473 case 0x5041: 1474 case 0x5042: 1475 tape_3590_print_era_msg(device, irb); 1476 return tape_3590_erp_swap(device, request, irb); 1477 1478 case 0x5110: 1479 case 0x5111: 1480 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1481 1482 case 0x5120: 1483 case 0x1120: 1484 tape_med_state_set(device, MS_UNLOADED); 1485 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1486 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1487 1488 case 0x6020: 1489 PRINT_WARN("(%s): Cartridge of wrong type ?\n", 1490 device->cdev->dev.bus_id); 1491 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1492 1493 case 0x8011: 1494 PRINT_WARN("(%s): Another host has reserved the tape device\n", 1495 device->cdev->dev.bus_id); 1496 return tape_3590_erp_basic(device, request, irb, -EPERM); 1497 case 0x8013: 1498 PRINT_WARN("(%s): Another host has privileged access to the " 1499 "tape device\n", device->cdev->dev.bus_id); 1500 PRINT_WARN("(%s): To solve the problem unload the current " 1501 "cartridge!\n", device->cdev->dev.bus_id); 1502 return tape_3590_erp_basic(device, request, irb, -EPERM); 1503 default: 1504 return tape_3590_erp_basic(device, request, irb, -EIO); 1505 } 1506 } 1507 1508 /* 1509 * 3590 interrupt handler: 1510 */ 1511 static int 1512 tape_3590_irq(struct tape_device *device, struct tape_request *request, 1513 struct irb *irb) 1514 { 1515 if (request == NULL) 1516 return tape_3590_unsolicited_irq(device, irb); 1517 1518 if ((irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) && 1519 (irb->scsw.dstat & DEV_STAT_DEV_END) && (request->op == TO_WRI)) { 1520 /* Write at end of volume */ 1521 DBF_EVENT(2, "End of volume\n"); 1522 return tape_3590_erp_failed(device, request, irb, -ENOSPC); 1523 } 1524 1525 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) 1526 return tape_3590_unit_check(device, request, irb); 1527 1528 if (irb->scsw.dstat & DEV_STAT_DEV_END) { 1529 if (irb->scsw.dstat == DEV_STAT_UNIT_EXCEP) { 1530 if (request->op == TO_FSB || request->op == TO_BSB) 1531 request->rescnt++; 1532 else 1533 DBF_EVENT(5, "Unit Exception!\n"); 1534 } 1535 1536 return tape_3590_done(device, request); 1537 } 1538 1539 if (irb->scsw.dstat & DEV_STAT_CHN_END) { 1540 DBF_EVENT(2, "cannel end\n"); 1541 return TAPE_IO_PENDING; 1542 } 1543 1544 if (irb->scsw.dstat & DEV_STAT_ATTENTION) { 1545 DBF_EVENT(2, "Unit Attention when busy..\n"); 1546 return TAPE_IO_PENDING; 1547 } 1548 1549 DBF_EVENT(6, "xunknownirq\n"); 1550 PRINT_ERR("Unexpected interrupt.\n"); 1551 PRINT_ERR("Current op is: %s", tape_op_verbose[request->op]); 1552 tape_dump_sense(device, request, irb); 1553 return TAPE_IO_STOP; 1554 } 1555 1556 1557 static int tape_3590_read_dev_chars(struct tape_device *device, 1558 struct tape_3590_rdc_data *rdc_data) 1559 { 1560 int rc; 1561 struct tape_request *request; 1562 1563 request = tape_alloc_request(1, sizeof(*rdc_data)); 1564 if (IS_ERR(request)) 1565 return PTR_ERR(request); 1566 request->op = TO_RDC; 1567 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), 1568 request->cpdata); 1569 rc = tape_do_io(device, request); 1570 if (rc == 0) 1571 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); 1572 tape_free_request(request); 1573 return rc; 1574 } 1575 1576 /* 1577 * Setup device function 1578 */ 1579 static int 1580 tape_3590_setup_device(struct tape_device *device) 1581 { 1582 int rc; 1583 struct tape_3590_disc_data *data; 1584 struct tape_3590_rdc_data *rdc_data; 1585 1586 DBF_EVENT(6, "3590 device setup\n"); 1587 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); 1588 if (data == NULL) 1589 return -ENOMEM; 1590 data->read_back_op = READ_PREVIOUS; 1591 device->discdata = data; 1592 1593 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); 1594 if (!rdc_data) { 1595 rc = -ENOMEM; 1596 goto fail_kmalloc; 1597 } 1598 rc = tape_3590_read_dev_chars(device, rdc_data); 1599 if (rc) { 1600 DBF_LH(3, "Read device characteristics failed!\n"); 1601 goto fail_rdc_data; 1602 } 1603 rc = tape_std_assign(device); 1604 if (rc) 1605 goto fail_rdc_data; 1606 if (rdc_data->data[31] == 0x13) { 1607 PRINT_INFO("Device has crypto support\n"); 1608 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; 1609 tape_3592_disable_crypt(device); 1610 } else { 1611 DBF_EVENT(6, "Device has NO crypto support\n"); 1612 } 1613 /* Try to find out if medium is loaded */ 1614 rc = tape_3590_sense_medium(device); 1615 if (rc) { 1616 DBF_LH(3, "3590 medium sense returned %d\n", rc); 1617 goto fail_rdc_data; 1618 } 1619 return 0; 1620 1621 fail_rdc_data: 1622 kfree(rdc_data); 1623 fail_kmalloc: 1624 kfree(data); 1625 return rc; 1626 } 1627 1628 /* 1629 * Cleanup device function 1630 */ 1631 static void 1632 tape_3590_cleanup_device(struct tape_device *device) 1633 { 1634 flush_scheduled_work(); 1635 tape_std_unassign(device); 1636 1637 kfree(device->discdata); 1638 device->discdata = NULL; 1639 } 1640 1641 /* 1642 * List of 3590 magnetic tape commands. 1643 */ 1644 static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { 1645 [MTRESET] = tape_std_mtreset, 1646 [MTFSF] = tape_std_mtfsf, 1647 [MTBSF] = tape_std_mtbsf, 1648 [MTFSR] = tape_std_mtfsr, 1649 [MTBSR] = tape_std_mtbsr, 1650 [MTWEOF] = tape_std_mtweof, 1651 [MTREW] = tape_std_mtrew, 1652 [MTOFFL] = tape_std_mtoffl, 1653 [MTNOP] = tape_std_mtnop, 1654 [MTRETEN] = tape_std_mtreten, 1655 [MTBSFM] = tape_std_mtbsfm, 1656 [MTFSFM] = tape_std_mtfsfm, 1657 [MTEOM] = tape_std_mteom, 1658 [MTERASE] = tape_std_mterase, 1659 [MTRAS1] = NULL, 1660 [MTRAS2] = NULL, 1661 [MTRAS3] = NULL, 1662 [MTSETBLK] = tape_std_mtsetblk, 1663 [MTSETDENSITY] = NULL, 1664 [MTSEEK] = tape_3590_mtseek, 1665 [MTTELL] = tape_3590_mttell, 1666 [MTSETDRVBUFFER] = NULL, 1667 [MTFSS] = NULL, 1668 [MTBSS] = NULL, 1669 [MTWSM] = NULL, 1670 [MTLOCK] = NULL, 1671 [MTUNLOCK] = NULL, 1672 [MTLOAD] = tape_std_mtload, 1673 [MTUNLOAD] = tape_std_mtunload, 1674 [MTCOMPRESSION] = tape_std_mtcompression, 1675 [MTSETPART] = NULL, 1676 [MTMKPART] = NULL 1677 }; 1678 1679 /* 1680 * Tape discipline structure for 3590. 1681 */ 1682 static struct tape_discipline tape_discipline_3590 = { 1683 .owner = THIS_MODULE, 1684 .setup_device = tape_3590_setup_device, 1685 .cleanup_device = tape_3590_cleanup_device, 1686 .process_eov = tape_std_process_eov, 1687 .irq = tape_3590_irq, 1688 .read_block = tape_std_read_block, 1689 .write_block = tape_std_write_block, 1690 #ifdef CONFIG_S390_TAPE_BLOCK 1691 .bread = tape_3590_bread, 1692 .free_bread = tape_3590_free_bread, 1693 .check_locate = tape_3590_check_locate, 1694 #endif 1695 .ioctl_fn = tape_3590_ioctl, 1696 .mtop_array = tape_3590_mtop 1697 }; 1698 1699 static struct ccw_device_id tape_3590_ids[] = { 1700 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, 1701 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, 1702 { /* end of list */ } 1703 }; 1704 1705 static int 1706 tape_3590_online(struct ccw_device *cdev) 1707 { 1708 return tape_generic_online(cdev->dev.driver_data, 1709 &tape_discipline_3590); 1710 } 1711 1712 static int 1713 tape_3590_offline(struct ccw_device *cdev) 1714 { 1715 return tape_generic_offline(cdev->dev.driver_data); 1716 } 1717 1718 static struct ccw_driver tape_3590_driver = { 1719 .name = "tape_3590", 1720 .owner = THIS_MODULE, 1721 .ids = tape_3590_ids, 1722 .probe = tape_generic_probe, 1723 .remove = tape_generic_remove, 1724 .set_offline = tape_3590_offline, 1725 .set_online = tape_3590_online, 1726 }; 1727 1728 /* 1729 * Setup discipline structure. 1730 */ 1731 static int 1732 tape_3590_init(void) 1733 { 1734 int rc; 1735 1736 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); 1737 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); 1738 #ifdef DBF_LIKE_HELL 1739 debug_set_level(TAPE_DBF_AREA, 6); 1740 #endif 1741 1742 DBF_EVENT(3, "3590 init\n"); 1743 /* Register driver for 3590 tapes. */ 1744 rc = ccw_driver_register(&tape_3590_driver); 1745 if (rc) 1746 DBF_EVENT(3, "3590 init failed\n"); 1747 else 1748 DBF_EVENT(3, "3590 registered\n"); 1749 return rc; 1750 } 1751 1752 static void 1753 tape_3590_exit(void) 1754 { 1755 ccw_driver_unregister(&tape_3590_driver); 1756 1757 debug_unregister(TAPE_DBF_AREA); 1758 } 1759 1760 MODULE_DEVICE_TABLE(ccw, tape_3590_ids); 1761 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); 1762 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); 1763 MODULE_LICENSE("GPL"); 1764 1765 module_init(tape_3590_init); 1766 module_exit(tape_3590_exit); 1767