tape_3590.c revision 8fd138c366a8a302d9da8a428c6e927c8bff7d35
1/* 2 * drivers/s390/char/tape_3590.c 3 * tape device discipline for 3590 tapes. 4 * 5 * Copyright IBM Corp. 2001, 2009 6 * Author(s): Stefan Bader <shbader@de.ibm.com> 7 * Michael Holzheu <holzheu@de.ibm.com> 8 * Martin Schwidefsky <schwidefsky@de.ibm.com> 9 */ 10 11#define KMSG_COMPONENT "tape_3590" 12 13#include <linux/module.h> 14#include <linux/init.h> 15#include <linux/bio.h> 16#include <asm/ebcdic.h> 17 18#define TAPE_DBF_AREA tape_3590_dbf 19#define BUFSIZE 512 /* size of buffers for dynamic generated messages */ 20 21#include "tape.h" 22#include "tape_std.h" 23#include "tape_3590.h" 24 25/* 26 * Pointer to debug area. 27 */ 28debug_info_t *TAPE_DBF_AREA = NULL; 29EXPORT_SYMBOL(TAPE_DBF_AREA); 30 31/******************************************************************* 32 * Error Recovery fuctions: 33 * - Read Opposite: implemented 34 * - Read Device (buffered) log: BRA 35 * - Read Library log: BRA 36 * - Swap Devices: BRA 37 * - Long Busy: implemented 38 * - Special Intercept: BRA 39 * - Read Alternate: implemented 40 *******************************************************************/ 41 42static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = { 43 [0x00] = "", 44 [0x10] = "Lost Sense", 45 [0x11] = "Assigned Elsewhere", 46 [0x12] = "Allegiance Reset", 47 [0x13] = "Shared Access Violation", 48 [0x20] = "Command Reject", 49 [0x21] = "Configuration Error", 50 [0x22] = "Protection Exception", 51 [0x23] = "Write Protect", 52 [0x24] = "Write Length", 53 [0x25] = "Read-Only Format", 54 [0x31] = "Beginning of Partition", 55 [0x33] = "End of Partition", 56 [0x34] = "End of Data", 57 [0x35] = "Block not found", 58 [0x40] = "Device Intervention", 59 [0x41] = "Loader Intervention", 60 [0x42] = "Library Intervention", 61 [0x50] = "Write Error", 62 [0x51] = "Erase Error", 63 [0x52] = "Formatting Error", 64 [0x53] = "Read Error", 65 [0x54] = "Unsupported Format", 66 [0x55] = "No Formatting", 67 [0x56] = "Positioning lost", 68 [0x57] = "Read Length", 69 [0x60] = "Unsupported Medium", 70 [0x61] = "Medium Length Error", 71 [0x62] = "Medium removed", 72 [0x64] = "Load Check", 73 [0x65] = "Unload Check", 74 [0x70] = "Equipment Check", 75 [0x71] = "Bus out Check", 76 [0x72] = "Protocol Error", 77 [0x73] = "Interface Error", 78 [0x74] = "Overrun", 79 [0x75] = "Halt Signal", 80 [0x90] = "Device fenced", 81 [0x91] = "Device Path fenced", 82 [0xa0] = "Volume misplaced", 83 [0xa1] = "Volume inaccessible", 84 [0xa2] = "Volume in input", 85 [0xa3] = "Volume ejected", 86 [0xa4] = "All categories reserved", 87 [0xa5] = "Duplicate Volume", 88 [0xa6] = "Library Manager Offline", 89 [0xa7] = "Library Output Station full", 90 [0xa8] = "Vision System non-operational", 91 [0xa9] = "Library Manager Equipment Check", 92 [0xaa] = "Library Equipment Check", 93 [0xab] = "All Library Cells full", 94 [0xac] = "No Cleaner Volumes in Library", 95 [0xad] = "I/O Station door open", 96 [0xae] = "Subsystem environmental alert", 97}; 98 99static int crypt_supported(struct tape_device *device) 100{ 101 return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device)); 102} 103 104static int crypt_enabled(struct tape_device *device) 105{ 106 return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device)); 107} 108 109static void ext_to_int_kekl(struct tape390_kekl *in, 110 struct tape3592_kekl *out) 111{ 112 int i; 113 114 memset(out, 0, sizeof(*out)); 115 if (in->type == TAPE390_KEKL_TYPE_HASH) 116 out->flags |= 0x40; 117 if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH) 118 out->flags |= 0x80; 119 strncpy(out->label, in->label, 64); 120 for (i = strlen(in->label); i < sizeof(out->label); i++) 121 out->label[i] = ' '; 122 ASCEBC(out->label, sizeof(out->label)); 123} 124 125static void int_to_ext_kekl(struct tape3592_kekl *in, 126 struct tape390_kekl *out) 127{ 128 memset(out, 0, sizeof(*out)); 129 if(in->flags & 0x40) 130 out->type = TAPE390_KEKL_TYPE_HASH; 131 else 132 out->type = TAPE390_KEKL_TYPE_LABEL; 133 if(in->flags & 0x80) 134 out->type_on_tape = TAPE390_KEKL_TYPE_HASH; 135 else 136 out->type_on_tape = TAPE390_KEKL_TYPE_LABEL; 137 memcpy(out->label, in->label, sizeof(in->label)); 138 EBCASC(out->label, sizeof(in->label)); 139 strstrip(out->label); 140} 141 142static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in, 143 struct tape390_kekl_pair *out) 144{ 145 if (in->count == 0) { 146 out->kekl[0].type = TAPE390_KEKL_TYPE_NONE; 147 out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE; 148 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; 149 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; 150 } else if (in->count == 1) { 151 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); 152 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; 153 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; 154 } else if (in->count == 2) { 155 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); 156 int_to_ext_kekl(&in->kekl[1], &out->kekl[1]); 157 } else { 158 printk("Invalid KEKL number: %d\n", in->count); 159 BUG(); 160 } 161} 162 163static int check_ext_kekl(struct tape390_kekl *kekl) 164{ 165 if (kekl->type == TAPE390_KEKL_TYPE_NONE) 166 goto invalid; 167 if (kekl->type > TAPE390_KEKL_TYPE_HASH) 168 goto invalid; 169 if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE) 170 goto invalid; 171 if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH) 172 goto invalid; 173 if ((kekl->type == TAPE390_KEKL_TYPE_HASH) && 174 (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL)) 175 goto invalid; 176 177 return 0; 178invalid: 179 return -EINVAL; 180} 181 182static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls) 183{ 184 if (check_ext_kekl(&kekls->kekl[0])) 185 goto invalid; 186 if (check_ext_kekl(&kekls->kekl[1])) 187 goto invalid; 188 189 return 0; 190invalid: 191 return -EINVAL; 192} 193 194/* 195 * Query KEKLs 196 */ 197static int tape_3592_kekl_query(struct tape_device *device, 198 struct tape390_kekl_pair *ext_kekls) 199{ 200 struct tape_request *request; 201 struct tape3592_kekl_query_order *order; 202 struct tape3592_kekl_query_data *int_kekls; 203 int rc; 204 205 DBF_EVENT(6, "tape3592_kekl_query\n"); 206 int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA); 207 if (!int_kekls) 208 return -ENOMEM; 209 request = tape_alloc_request(2, sizeof(*order)); 210 if (IS_ERR(request)) { 211 rc = PTR_ERR(request); 212 goto fail_malloc; 213 } 214 order = request->cpdata; 215 memset(order,0,sizeof(*order)); 216 order->code = 0xe2; 217 order->max_count = 2; 218 request->op = TO_KEKL_QUERY; 219 tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); 220 tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls), 221 int_kekls); 222 rc = tape_do_io(device, request); 223 if (rc) 224 goto fail_request; 225 int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls); 226 227 rc = 0; 228fail_request: 229 tape_free_request(request); 230fail_malloc: 231 kfree(int_kekls); 232 return rc; 233} 234 235/* 236 * IOCTL: Query KEKLs 237 */ 238static int tape_3592_ioctl_kekl_query(struct tape_device *device, 239 unsigned long arg) 240{ 241 int rc; 242 struct tape390_kekl_pair *ext_kekls; 243 244 DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n"); 245 if (!crypt_supported(device)) 246 return -ENOSYS; 247 if (!crypt_enabled(device)) 248 return -EUNATCH; 249 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); 250 if (!ext_kekls) 251 return -ENOMEM; 252 rc = tape_3592_kekl_query(device, ext_kekls); 253 if (rc != 0) 254 goto fail; 255 if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) { 256 rc = -EFAULT; 257 goto fail; 258 } 259 rc = 0; 260fail: 261 kfree(ext_kekls); 262 return rc; 263} 264 265static int tape_3590_mttell(struct tape_device *device, int mt_count); 266 267/* 268 * Set KEKLs 269 */ 270static int tape_3592_kekl_set(struct tape_device *device, 271 struct tape390_kekl_pair *ext_kekls) 272{ 273 struct tape_request *request; 274 struct tape3592_kekl_set_order *order; 275 276 DBF_EVENT(6, "tape3592_kekl_set\n"); 277 if (check_ext_kekl_pair(ext_kekls)) { 278 DBF_EVENT(6, "invalid kekls\n"); 279 return -EINVAL; 280 } 281 if (tape_3590_mttell(device, 0) != 0) 282 return -EBADSLT; 283 request = tape_alloc_request(1, sizeof(*order)); 284 if (IS_ERR(request)) 285 return PTR_ERR(request); 286 order = request->cpdata; 287 memset(order, 0, sizeof(*order)); 288 order->code = 0xe3; 289 order->kekls.count = 2; 290 ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]); 291 ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]); 292 request->op = TO_KEKL_SET; 293 tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); 294 295 return tape_do_io_free(device, request); 296} 297 298/* 299 * IOCTL: Set KEKLs 300 */ 301static int tape_3592_ioctl_kekl_set(struct tape_device *device, 302 unsigned long arg) 303{ 304 int rc; 305 struct tape390_kekl_pair *ext_kekls; 306 307 DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n"); 308 if (!crypt_supported(device)) 309 return -ENOSYS; 310 if (!crypt_enabled(device)) 311 return -EUNATCH; 312 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); 313 if (!ext_kekls) 314 return -ENOMEM; 315 if (copy_from_user(ext_kekls, (char __user *)arg, sizeof(*ext_kekls))) { 316 rc = -EFAULT; 317 goto out; 318 } 319 rc = tape_3592_kekl_set(device, ext_kekls); 320out: 321 kfree(ext_kekls); 322 return rc; 323} 324 325/* 326 * Enable encryption 327 */ 328static int tape_3592_enable_crypt(struct tape_device *device) 329{ 330 struct tape_request *request; 331 char *data; 332 333 DBF_EVENT(6, "tape_3592_enable_crypt\n"); 334 if (!crypt_supported(device)) 335 return -ENOSYS; 336 request = tape_alloc_request(2, 72); 337 if (IS_ERR(request)) 338 return PTR_ERR(request); 339 data = request->cpdata; 340 memset(data,0,72); 341 342 data[0] = 0x05; 343 data[36 + 0] = 0x03; 344 data[36 + 1] = 0x03; 345 data[36 + 4] = 0x40; 346 data[36 + 6] = 0x01; 347 data[36 + 14] = 0x2f; 348 data[36 + 18] = 0xc3; 349 data[36 + 35] = 0x72; 350 request->op = TO_CRYPT_ON; 351 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 352 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 353 return tape_do_io_free(device, request); 354} 355 356/* 357 * Disable encryption 358 */ 359static int tape_3592_disable_crypt(struct tape_device *device) 360{ 361 struct tape_request *request; 362 char *data; 363 364 DBF_EVENT(6, "tape_3592_disable_crypt\n"); 365 if (!crypt_supported(device)) 366 return -ENOSYS; 367 request = tape_alloc_request(2, 72); 368 if (IS_ERR(request)) 369 return PTR_ERR(request); 370 data = request->cpdata; 371 memset(data,0,72); 372 373 data[0] = 0x05; 374 data[36 + 0] = 0x03; 375 data[36 + 1] = 0x03; 376 data[36 + 35] = 0x32; 377 378 request->op = TO_CRYPT_OFF; 379 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 380 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 381 382 return tape_do_io_free(device, request); 383} 384 385/* 386 * IOCTL: Set encryption status 387 */ 388static int tape_3592_ioctl_crypt_set(struct tape_device *device, 389 unsigned long arg) 390{ 391 struct tape390_crypt_info info; 392 393 DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n"); 394 if (!crypt_supported(device)) 395 return -ENOSYS; 396 if (copy_from_user(&info, (char __user *)arg, sizeof(info))) 397 return -EFAULT; 398 if (info.status & ~TAPE390_CRYPT_ON_MASK) 399 return -EINVAL; 400 if (info.status & TAPE390_CRYPT_ON_MASK) 401 return tape_3592_enable_crypt(device); 402 else 403 return tape_3592_disable_crypt(device); 404} 405 406static int tape_3590_sense_medium(struct tape_device *device); 407 408/* 409 * IOCTL: Query enryption status 410 */ 411static int tape_3592_ioctl_crypt_query(struct tape_device *device, 412 unsigned long arg) 413{ 414 DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n"); 415 if (!crypt_supported(device)) 416 return -ENOSYS; 417 tape_3590_sense_medium(device); 418 if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device), 419 sizeof(TAPE_3590_CRYPT_INFO(device)))) 420 return -EFAULT; 421 else 422 return 0; 423} 424 425/* 426 * 3590 IOCTL Overload 427 */ 428static int 429tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) 430{ 431 switch (cmd) { 432 case TAPE390_DISPLAY: { 433 struct display_struct disp; 434 435 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp))) 436 return -EFAULT; 437 438 return tape_std_display(device, &disp); 439 } 440 case TAPE390_KEKL_SET: 441 return tape_3592_ioctl_kekl_set(device, arg); 442 case TAPE390_KEKL_QUERY: 443 return tape_3592_ioctl_kekl_query(device, arg); 444 case TAPE390_CRYPT_SET: 445 return tape_3592_ioctl_crypt_set(device, arg); 446 case TAPE390_CRYPT_QUERY: 447 return tape_3592_ioctl_crypt_query(device, arg); 448 default: 449 return -EINVAL; /* no additional ioctls */ 450 } 451} 452 453/* 454 * SENSE Medium: Get Sense data about medium state 455 */ 456static int 457tape_3590_sense_medium(struct tape_device *device) 458{ 459 struct tape_request *request; 460 461 request = tape_alloc_request(1, 128); 462 if (IS_ERR(request)) 463 return PTR_ERR(request); 464 request->op = TO_MSEN; 465 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); 466 return tape_do_io_free(device, request); 467} 468 469/* 470 * MTTELL: Tell block. Return the number of block relative to current file. 471 */ 472static int 473tape_3590_mttell(struct tape_device *device, int mt_count) 474{ 475 __u64 block_id; 476 int rc; 477 478 rc = tape_std_read_block_id(device, &block_id); 479 if (rc) 480 return rc; 481 return block_id >> 32; 482} 483 484/* 485 * MTSEEK: seek to the specified block. 486 */ 487static int 488tape_3590_mtseek(struct tape_device *device, int count) 489{ 490 struct tape_request *request; 491 492 DBF_EVENT(6, "xsee id: %x\n", count); 493 request = tape_alloc_request(3, 4); 494 if (IS_ERR(request)) 495 return PTR_ERR(request); 496 request->op = TO_LBL; 497 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 498 *(__u32 *) request->cpdata = count; 499 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 500 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 501 return tape_do_io_free(device, request); 502} 503 504/* 505 * Read Opposite Error Recovery Function: 506 * Used, when Read Forward does not work 507 */ 508static void 509tape_3590_read_opposite(struct tape_device *device, 510 struct tape_request *request) 511{ 512 struct tape_3590_disc_data *data; 513 514 /* 515 * We have allocated 4 ccws in tape_std_read, so we can now 516 * transform the request to a read backward, followed by a 517 * forward space block. 518 */ 519 request->op = TO_RBA; 520 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 521 data = device->discdata; 522 tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op, 523 device->char_data.idal_buf); 524 tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); 525 tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); 526 DBF_EVENT(6, "xrop ccwg\n"); 527} 528 529/* 530 * Read Attention Msg 531 * This should be done after an interrupt with attention bit (0x80) 532 * in device state. 533 * 534 * After a "read attention message" request there are two possible 535 * results: 536 * 537 * 1. A unit check is presented, when attention sense is present (e.g. when 538 * a medium has been unloaded). The attention sense comes then 539 * together with the unit check. The recovery action is either "retry" 540 * (in case there is an attention message pending) or "permanent error". 541 * 542 * 2. The attention msg is written to the "read subsystem data" buffer. 543 * In this case we probably should print it to the console. 544 */ 545static int 546tape_3590_read_attmsg(struct tape_device *device) 547{ 548 struct tape_request *request; 549 char *buf; 550 551 request = tape_alloc_request(3, 4096); 552 if (IS_ERR(request)) 553 return PTR_ERR(request); 554 request->op = TO_READ_ATTMSG; 555 buf = request->cpdata; 556 buf[0] = PREP_RD_SS_DATA; 557 buf[6] = RD_ATTMSG; /* read att msg */ 558 tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf); 559 tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12); 560 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 561 return tape_do_io_free(device, request); 562} 563 564/* 565 * These functions are used to schedule follow-up actions from within an 566 * interrupt context (like unsolicited interrupts). 567 */ 568struct work_handler_data { 569 struct tape_device *device; 570 enum tape_op op; 571 struct work_struct work; 572}; 573 574static void 575tape_3590_work_handler(struct work_struct *work) 576{ 577 struct work_handler_data *p = 578 container_of(work, struct work_handler_data, work); 579 580 switch (p->op) { 581 case TO_MSEN: 582 tape_3590_sense_medium(p->device); 583 break; 584 case TO_READ_ATTMSG: 585 tape_3590_read_attmsg(p->device); 586 break; 587 case TO_CRYPT_ON: 588 tape_3592_enable_crypt(p->device); 589 break; 590 case TO_CRYPT_OFF: 591 tape_3592_disable_crypt(p->device); 592 break; 593 default: 594 DBF_EVENT(3, "T3590: work handler undefined for " 595 "operation 0x%02x\n", p->op); 596 } 597 tape_put_device(p->device); 598 kfree(p); 599} 600 601static int 602tape_3590_schedule_work(struct tape_device *device, enum tape_op op) 603{ 604 struct work_handler_data *p; 605 606 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) 607 return -ENOMEM; 608 609 INIT_WORK(&p->work, tape_3590_work_handler); 610 611 p->device = tape_get_device(device); 612 p->op = op; 613 614 schedule_work(&p->work); 615 return 0; 616} 617 618#ifdef CONFIG_S390_TAPE_BLOCK 619/* 620 * Tape Block READ 621 */ 622static struct tape_request * 623tape_3590_bread(struct tape_device *device, struct request *req) 624{ 625 struct tape_request *request; 626 struct ccw1 *ccw; 627 int count = 0, start_block; 628 unsigned off; 629 char *dst; 630 struct bio_vec *bv; 631 struct req_iterator iter; 632 633 DBF_EVENT(6, "xBREDid:"); 634 start_block = blk_rq_pos(req) >> TAPEBLOCK_HSEC_S2B; 635 DBF_EVENT(6, "start_block = %i\n", start_block); 636 637 rq_for_each_segment(bv, req, iter) 638 count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9); 639 640 request = tape_alloc_request(2 + count + 1, 4); 641 if (IS_ERR(request)) 642 return request; 643 request->op = TO_BLOCK; 644 *(__u32 *) request->cpdata = start_block; 645 ccw = request->cpaddr; 646 ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte); 647 648 /* 649 * We always setup a nop after the mode set ccw. This slot is 650 * used in tape_std_check_locate to insert a locate ccw if the 651 * current tape position doesn't match the start block to be read. 652 */ 653 ccw = tape_ccw_cc(ccw, NOP, 0, NULL); 654 655 rq_for_each_segment(bv, req, iter) { 656 dst = page_address(bv->bv_page) + bv->bv_offset; 657 for (off = 0; off < bv->bv_len; off += TAPEBLOCK_HSEC_SIZE) { 658 ccw->flags = CCW_FLAG_CC; 659 ccw->cmd_code = READ_FORWARD; 660 ccw->count = TAPEBLOCK_HSEC_SIZE; 661 set_normalized_cda(ccw, (void *) __pa(dst)); 662 ccw++; 663 dst += TAPEBLOCK_HSEC_SIZE; 664 } 665 BUG_ON(off > bv->bv_len); 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 DBF_EVENT(6, "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 successful 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 tape_dump_sense_dbf(device, NULL, irb); 851 } 852 /* check medium state */ 853 tape_3590_schedule_work(device, TO_MSEN); 854 return TAPE_IO_SUCCESS; 855} 856 857/* 858 * Basic Recovery routine 859 */ 860static int 861tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, 862 struct irb *irb, int rc) 863{ 864 struct tape_3590_sense *sense; 865 866 sense = (struct tape_3590_sense *) irb->ecw; 867 868 switch (sense->bra) { 869 case SENSE_BRA_PER: 870 return tape_3590_erp_failed(device, request, irb, rc); 871 case SENSE_BRA_CONT: 872 return tape_3590_erp_succeded(device, request); 873 case SENSE_BRA_RE: 874 return tape_3590_erp_retry(device, request, irb); 875 case SENSE_BRA_DRE: 876 return tape_3590_erp_failed(device, request, irb, rc); 877 default: 878 BUG(); 879 return TAPE_IO_STOP; 880 } 881} 882 883/* 884 * RDL: Read Device (buffered) log 885 */ 886static int 887tape_3590_erp_read_buf_log(struct tape_device *device, 888 struct tape_request *request, struct irb *irb) 889{ 890 /* 891 * We just do the basic error recovery at the moment (retry). 892 * Perhaps in the future, we read the log and dump it somewhere... 893 */ 894 return tape_3590_erp_basic(device, request, irb, -EIO); 895} 896 897/* 898 * SWAP: Swap Devices 899 */ 900static int 901tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, 902 struct irb *irb) 903{ 904 /* 905 * This error recovery should swap the tapes 906 * if the original has a problem. The operation 907 * should proceed with the new tape... this 908 * should probably be done in user space! 909 */ 910 dev_warn (&device->cdev->dev, "The tape medium must be loaded into a " 911 "different tape unit\n"); 912 return tape_3590_erp_basic(device, request, irb, -EIO); 913} 914 915/* 916 * LBY: Long Busy 917 */ 918static int 919tape_3590_erp_long_busy(struct tape_device *device, 920 struct tape_request *request, struct irb *irb) 921{ 922 DBF_EVENT(6, "Device is busy\n"); 923 return TAPE_IO_LONG_BUSY; 924} 925 926/* 927 * SPI: Special Intercept 928 */ 929static int 930tape_3590_erp_special_interrupt(struct tape_device *device, 931 struct tape_request *request, struct irb *irb) 932{ 933 return tape_3590_erp_basic(device, request, irb, -EIO); 934} 935 936/* 937 * RDA: Read Alternate 938 */ 939static int 940tape_3590_erp_read_alternate(struct tape_device *device, 941 struct tape_request *request, struct irb *irb) 942{ 943 struct tape_3590_disc_data *data; 944 945 /* 946 * The issued Read Backward or Read Previous command is not 947 * supported by the device 948 * The recovery action should be to issue another command: 949 * Read Revious: if Read Backward is not supported 950 * Read Backward: if Read Previous is not supported 951 */ 952 data = device->discdata; 953 if (data->read_back_op == READ_PREVIOUS) { 954 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", 955 device->cdev_id); 956 data->read_back_op = READ_BACKWARD; 957 } else { 958 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", 959 device->cdev_id); 960 data->read_back_op = READ_PREVIOUS; 961 } 962 tape_3590_read_opposite(device, request); 963 return tape_3590_erp_retry(device, request, irb); 964} 965 966/* 967 * Error Recovery read opposite 968 */ 969static int 970tape_3590_erp_read_opposite(struct tape_device *device, 971 struct tape_request *request, struct irb *irb) 972{ 973 switch (request->op) { 974 case TO_RFO: 975 /* 976 * We did read forward, but the data could not be read. 977 * We will read backward and then skip forward again. 978 */ 979 tape_3590_read_opposite(device, request); 980 return tape_3590_erp_retry(device, request, irb); 981 case TO_RBA: 982 /* We tried to read forward and backward, but hat no success */ 983 return tape_3590_erp_failed(device, request, irb, -EIO); 984 break; 985 default: 986 return tape_3590_erp_failed(device, request, irb, -EIO); 987 } 988} 989 990/* 991 * Print an MIM (Media Information Message) (message code f0) 992 */ 993static void 994tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) 995{ 996 struct tape_3590_sense *sense; 997 char *exception, *service; 998 999 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1000 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1001 1002 if (!exception || !service) 1003 goto out_nomem; 1004 1005 sense = (struct tape_3590_sense *) irb->ecw; 1006 /* Exception Message */ 1007 switch (sense->fmt.f70.emc) { 1008 case 0x02: 1009 snprintf(exception, BUFSIZE, "Data degraded"); 1010 break; 1011 case 0x03: 1012 snprintf(exception, BUFSIZE, "Data degraded in partion %i", 1013 sense->fmt.f70.mp); 1014 break; 1015 case 0x04: 1016 snprintf(exception, BUFSIZE, "Medium degraded"); 1017 break; 1018 case 0x05: 1019 snprintf(exception, BUFSIZE, "Medium degraded in partition %i", 1020 sense->fmt.f70.mp); 1021 break; 1022 case 0x06: 1023 snprintf(exception, BUFSIZE, "Block 0 Error"); 1024 break; 1025 case 0x07: 1026 snprintf(exception, BUFSIZE, "Medium Exception 0x%02x", 1027 sense->fmt.f70.md); 1028 break; 1029 default: 1030 snprintf(exception, BUFSIZE, "0x%02x", 1031 sense->fmt.f70.emc); 1032 break; 1033 } 1034 /* Service Message */ 1035 switch (sense->fmt.f70.smc) { 1036 case 0x02: 1037 snprintf(service, BUFSIZE, "Reference Media maintenance " 1038 "procedure %i", sense->fmt.f70.md); 1039 break; 1040 default: 1041 snprintf(service, BUFSIZE, "0x%02x", 1042 sense->fmt.f70.smc); 1043 break; 1044 } 1045 1046 dev_warn (&device->cdev->dev, "Tape media information: exception %s, " 1047 "service %s\n", exception, service); 1048 1049out_nomem: 1050 kfree(exception); 1051 kfree(service); 1052} 1053 1054/* 1055 * Print an I/O Subsystem Service Information Message (message code f1) 1056 */ 1057static void 1058tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) 1059{ 1060 struct tape_3590_sense *sense; 1061 char *exception, *service; 1062 1063 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1064 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1065 1066 if (!exception || !service) 1067 goto out_nomem; 1068 1069 sense = (struct tape_3590_sense *) irb->ecw; 1070 /* Exception Message */ 1071 switch (sense->fmt.f71.emc) { 1072 case 0x01: 1073 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1074 break; 1075 case 0x02: 1076 snprintf(exception, BUFSIZE, "CU Exception - no performance " 1077 "impact"); 1078 break; 1079 case 0x03: 1080 snprintf(exception, BUFSIZE, "CU Exception on channel " 1081 "interface 0x%02x", sense->fmt.f71.md[0]); 1082 break; 1083 case 0x04: 1084 snprintf(exception, BUFSIZE, "CU Exception on device path " 1085 "0x%02x", sense->fmt.f71.md[0]); 1086 break; 1087 case 0x05: 1088 snprintf(exception, BUFSIZE, "CU Exception on library path " 1089 "0x%02x", sense->fmt.f71.md[0]); 1090 break; 1091 case 0x06: 1092 snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x", 1093 sense->fmt.f71.md[0]); 1094 break; 1095 case 0x07: 1096 snprintf(exception, BUFSIZE, "CU Exception on partition " 1097 "0x%02x", sense->fmt.f71.md[0]); 1098 break; 1099 default: 1100 snprintf(exception, BUFSIZE, "0x%02x", 1101 sense->fmt.f71.emc); 1102 } 1103 /* Service Message */ 1104 switch (sense->fmt.f71.smc) { 1105 case 0x01: 1106 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1107 break; 1108 case 0x02: 1109 snprintf(service, BUFSIZE, "Repair will not impact cu " 1110 "performance"); 1111 break; 1112 case 0x03: 1113 if (sense->fmt.f71.mdf == 0) 1114 snprintf(service, BUFSIZE, "Repair will disable node " 1115 "0x%x on CU", sense->fmt.f71.md[1]); 1116 else 1117 snprintf(service, BUFSIZE, "Repair will disable " 1118 "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1], 1119 sense->fmt.f71.md[2]); 1120 break; 1121 case 0x04: 1122 if (sense->fmt.f71.mdf == 0) 1123 snprintf(service, BUFSIZE, "Repair will disable " 1124 "channel path 0x%x on CU", 1125 sense->fmt.f71.md[1]); 1126 else 1127 snprintf(service, BUFSIZE, "Repair will disable cannel" 1128 " paths (0x%x-0x%x) on CU", 1129 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1130 break; 1131 case 0x05: 1132 if (sense->fmt.f71.mdf == 0) 1133 snprintf(service, BUFSIZE, "Repair will disable device" 1134 " path 0x%x on CU", sense->fmt.f71.md[1]); 1135 else 1136 snprintf(service, BUFSIZE, "Repair will disable device" 1137 " paths (0x%x-0x%x) on CU", 1138 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1139 break; 1140 case 0x06: 1141 if (sense->fmt.f71.mdf == 0) 1142 snprintf(service, BUFSIZE, "Repair will disable " 1143 "library path 0x%x on CU", 1144 sense->fmt.f71.md[1]); 1145 else 1146 snprintf(service, BUFSIZE, "Repair will disable " 1147 "library paths (0x%x-0x%x) on CU", 1148 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1149 break; 1150 case 0x07: 1151 snprintf(service, BUFSIZE, "Repair will disable access to CU"); 1152 break; 1153 default: 1154 snprintf(service, BUFSIZE, "0x%02x", 1155 sense->fmt.f71.smc); 1156 } 1157 1158 dev_warn (&device->cdev->dev, "I/O subsystem information: exception" 1159 " %s, service %s\n", exception, service); 1160out_nomem: 1161 kfree(exception); 1162 kfree(service); 1163} 1164 1165/* 1166 * Print an Device Subsystem Service Information Message (message code f2) 1167 */ 1168static void 1169tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) 1170{ 1171 struct tape_3590_sense *sense; 1172 char *exception, *service; 1173 1174 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1175 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1176 1177 if (!exception || !service) 1178 goto out_nomem; 1179 1180 sense = (struct tape_3590_sense *) irb->ecw; 1181 /* Exception Message */ 1182 switch (sense->fmt.f71.emc) { 1183 case 0x01: 1184 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1185 break; 1186 case 0x02: 1187 snprintf(exception, BUFSIZE, "DV Exception - no performance" 1188 " impact"); 1189 break; 1190 case 0x03: 1191 snprintf(exception, BUFSIZE, "DV Exception on channel " 1192 "interface 0x%02x", sense->fmt.f71.md[0]); 1193 break; 1194 case 0x04: 1195 snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x", 1196 sense->fmt.f71.md[0]); 1197 break; 1198 case 0x05: 1199 snprintf(exception, BUFSIZE, "DV Exception on message display" 1200 " 0x%02x", sense->fmt.f71.md[0]); 1201 break; 1202 case 0x06: 1203 snprintf(exception, BUFSIZE, "DV Exception in tape path"); 1204 break; 1205 case 0x07: 1206 snprintf(exception, BUFSIZE, "DV Exception in drive"); 1207 break; 1208 default: 1209 snprintf(exception, BUFSIZE, "0x%02x", 1210 sense->fmt.f71.emc); 1211 } 1212 /* Service Message */ 1213 switch (sense->fmt.f71.smc) { 1214 case 0x01: 1215 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1216 break; 1217 case 0x02: 1218 snprintf(service, BUFSIZE, "Repair will not impact device " 1219 "performance"); 1220 break; 1221 case 0x03: 1222 if (sense->fmt.f71.mdf == 0) 1223 snprintf(service, BUFSIZE, "Repair will disable " 1224 "channel path 0x%x on DV", 1225 sense->fmt.f71.md[1]); 1226 else 1227 snprintf(service, BUFSIZE, "Repair will disable " 1228 "channel path (0x%x-0x%x) on DV", 1229 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1230 break; 1231 case 0x04: 1232 if (sense->fmt.f71.mdf == 0) 1233 snprintf(service, BUFSIZE, "Repair will disable " 1234 "interface 0x%x on DV", sense->fmt.f71.md[1]); 1235 else 1236 snprintf(service, BUFSIZE, "Repair will disable " 1237 "interfaces (0x%x-0x%x) on DV", 1238 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1239 break; 1240 case 0x05: 1241 if (sense->fmt.f71.mdf == 0) 1242 snprintf(service, BUFSIZE, "Repair will disable loader" 1243 " 0x%x on DV", sense->fmt.f71.md[1]); 1244 else 1245 snprintf(service, BUFSIZE, "Repair will disable loader" 1246 " (0x%x-0x%x) on DV", 1247 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1248 break; 1249 case 0x07: 1250 snprintf(service, BUFSIZE, "Repair will disable access to DV"); 1251 break; 1252 case 0x08: 1253 if (sense->fmt.f71.mdf == 0) 1254 snprintf(service, BUFSIZE, "Repair will disable " 1255 "message display 0x%x on DV", 1256 sense->fmt.f71.md[1]); 1257 else 1258 snprintf(service, BUFSIZE, "Repair will disable " 1259 "message displays (0x%x-0x%x) on DV", 1260 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1261 break; 1262 case 0x09: 1263 snprintf(service, BUFSIZE, "Clean DV"); 1264 break; 1265 default: 1266 snprintf(service, BUFSIZE, "0x%02x", 1267 sense->fmt.f71.smc); 1268 } 1269 1270 dev_warn (&device->cdev->dev, "Device subsystem information: exception" 1271 " %s, service %s\n", exception, service); 1272out_nomem: 1273 kfree(exception); 1274 kfree(service); 1275} 1276 1277/* 1278 * Print standard ERA Message 1279 */ 1280static void 1281tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) 1282{ 1283 struct tape_3590_sense *sense; 1284 1285 sense = (struct tape_3590_sense *) irb->ecw; 1286 if (sense->mc == 0) 1287 return; 1288 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { 1289 if (tape_3590_msg[sense->mc] != NULL) 1290 dev_warn (&device->cdev->dev, "The tape unit has " 1291 "issued sense message %s\n", 1292 tape_3590_msg[sense->mc]); 1293 else 1294 dev_warn (&device->cdev->dev, "The tape unit has " 1295 "issued an unknown sense message code 0x%x\n", 1296 sense->mc); 1297 return; 1298 } 1299 if (sense->mc == 0xf0) { 1300 /* Standard Media Information Message */ 1301 dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, " 1302 "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc, 1303 sense->fmt.f70.emc, sense->fmt.f70.smc, 1304 sense->fmt.f70.refcode, sense->fmt.f70.mid, 1305 sense->fmt.f70.fid); 1306 tape_3590_print_mim_msg_f0(device, irb); 1307 return; 1308 } 1309 if (sense->mc == 0xf1) { 1310 /* Standard I/O Subsystem Service Information Message */ 1311 dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x," 1312 " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1313 sense->fmt.f71.sev, device->cdev->id.dev_model, 1314 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1315 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1316 sense->fmt.f71.refcode3); 1317 tape_3590_print_io_sim_msg_f1(device, irb); 1318 return; 1319 } 1320 if (sense->mc == 0xf2) { 1321 /* Standard Device Service Information Message */ 1322 dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x" 1323 ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1324 sense->fmt.f71.sev, device->cdev->id.dev_model, 1325 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1326 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1327 sense->fmt.f71.refcode3); 1328 tape_3590_print_dev_sim_msg_f2(device, irb); 1329 return; 1330 } 1331 if (sense->mc == 0xf3) { 1332 /* Standard Library Service Information Message */ 1333 return; 1334 } 1335 dev_warn (&device->cdev->dev, "The tape unit has issued an unknown " 1336 "sense message code %x\n", sense->mc); 1337} 1338 1339static int tape_3590_crypt_error(struct tape_device *device, 1340 struct tape_request *request, struct irb *irb) 1341{ 1342 u8 cu_rc, ekm_rc1; 1343 u16 ekm_rc2; 1344 u32 drv_rc; 1345 const char *bus_id; 1346 char *sense; 1347 1348 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; 1349 bus_id = dev_name(&device->cdev->dev); 1350 cu_rc = sense[0]; 1351 drv_rc = *((u32*) &sense[5]) & 0xffffff; 1352 ekm_rc1 = sense[9]; 1353 ekm_rc2 = *((u16*) &sense[10]); 1354 if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) 1355 /* key not defined on EKM */ 1356 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); 1357 if ((cu_rc == 1) || (cu_rc == 2)) 1358 /* No connection to EKM */ 1359 return tape_3590_erp_basic(device, request, irb, -ENOTCONN); 1360 1361 dev_err (&device->cdev->dev, "The tape unit failed to obtain the " 1362 "encryption key from EKM\n"); 1363 1364 return tape_3590_erp_basic(device, request, irb, -ENOKEY); 1365} 1366 1367/* 1368 * 3590 error Recovery routine: 1369 * If possible, it tries to recover from the error. If this is not possible, 1370 * inform the user about the problem. 1371 */ 1372static int 1373tape_3590_unit_check(struct tape_device *device, struct tape_request *request, 1374 struct irb *irb) 1375{ 1376 struct tape_3590_sense *sense; 1377 int rc; 1378 1379#ifdef CONFIG_S390_TAPE_BLOCK 1380 if (request->op == TO_BLOCK) { 1381 /* 1382 * Recovery for block device requests. Set the block_position 1383 * to something invalid and retry. 1384 */ 1385 device->blk_data.block_position = -1; 1386 if (request->retries-- <= 0) 1387 return tape_3590_erp_failed(device, request, irb, -EIO); 1388 else 1389 return tape_3590_erp_retry(device, request, irb); 1390 } 1391#endif 1392 1393 sense = (struct tape_3590_sense *) irb->ecw; 1394 1395 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); 1396 1397 /* 1398 * First check all RC-QRCs where we want to do something special 1399 * - "break": basic error recovery is done 1400 * - "goto out:": just print error message if available 1401 */ 1402 rc = -EIO; 1403 switch (sense->rc_rqc) { 1404 1405 case 0x1110: 1406 tape_3590_print_era_msg(device, irb); 1407 return tape_3590_erp_read_buf_log(device, request, irb); 1408 1409 case 0x2011: 1410 tape_3590_print_era_msg(device, irb); 1411 return tape_3590_erp_read_alternate(device, request, irb); 1412 1413 case 0x2230: 1414 case 0x2231: 1415 tape_3590_print_era_msg(device, irb); 1416 return tape_3590_erp_special_interrupt(device, request, irb); 1417 case 0x2240: 1418 return tape_3590_crypt_error(device, request, irb); 1419 1420 case 0x3010: 1421 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", 1422 device->cdev_id); 1423 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1424 case 0x3012: 1425 DBF_EVENT(2, "(%08x): Forward at End of Partition\n", 1426 device->cdev_id); 1427 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1428 case 0x3020: 1429 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); 1430 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1431 1432 case 0x3122: 1433 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", 1434 device->cdev_id); 1435 return tape_3590_erp_basic(device, request, irb, -EIO); 1436 case 0x3123: 1437 DBF_EVENT(2, "(%08x): Rewind Unload complete\n", 1438 device->cdev_id); 1439 tape_med_state_set(device, MS_UNLOADED); 1440 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1441 return tape_3590_erp_basic(device, request, irb, 0); 1442 1443 case 0x4010: 1444 /* 1445 * print additional msg since default msg 1446 * "device intervention" is not very meaningfull 1447 */ 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 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1494 1495 case 0x8011: 1496 return tape_3590_erp_basic(device, request, irb, -EPERM); 1497 case 0x8013: 1498 dev_warn (&device->cdev->dev, "A different host has privileged" 1499 " access to the tape unit\n"); 1500 return tape_3590_erp_basic(device, request, irb, -EPERM); 1501 default: 1502 return tape_3590_erp_basic(device, request, irb, -EIO); 1503 } 1504} 1505 1506/* 1507 * 3590 interrupt handler: 1508 */ 1509static int 1510tape_3590_irq(struct tape_device *device, struct tape_request *request, 1511 struct irb *irb) 1512{ 1513 if (request == NULL) 1514 return tape_3590_unsolicited_irq(device, irb); 1515 1516 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && 1517 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && 1518 (request->op == TO_WRI)) { 1519 /* Write at end of volume */ 1520 DBF_EVENT(2, "End of volume\n"); 1521 return tape_3590_erp_failed(device, request, irb, -ENOSPC); 1522 } 1523 1524 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) 1525 return tape_3590_unit_check(device, request, irb); 1526 1527 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { 1528 if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) { 1529 if (request->op == TO_FSB || request->op == TO_BSB) 1530 request->rescnt++; 1531 else 1532 DBF_EVENT(5, "Unit Exception!\n"); 1533 } 1534 1535 return tape_3590_done(device, request); 1536 } 1537 1538 if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) { 1539 DBF_EVENT(2, "cannel end\n"); 1540 return TAPE_IO_PENDING; 1541 } 1542 1543 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 1544 DBF_EVENT(2, "Unit Attention when busy..\n"); 1545 return TAPE_IO_PENDING; 1546 } 1547 1548 DBF_EVENT(6, "xunknownirq\n"); 1549 tape_dump_sense_dbf(device, request, irb); 1550 return TAPE_IO_STOP; 1551} 1552 1553 1554static int tape_3590_read_dev_chars(struct tape_device *device, 1555 struct tape_3590_rdc_data *rdc_data) 1556{ 1557 int rc; 1558 struct tape_request *request; 1559 1560 request = tape_alloc_request(1, sizeof(*rdc_data)); 1561 if (IS_ERR(request)) 1562 return PTR_ERR(request); 1563 request->op = TO_RDC; 1564 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), 1565 request->cpdata); 1566 rc = tape_do_io(device, request); 1567 if (rc == 0) 1568 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); 1569 tape_free_request(request); 1570 return rc; 1571} 1572 1573/* 1574 * Setup device function 1575 */ 1576static int 1577tape_3590_setup_device(struct tape_device *device) 1578{ 1579 int rc; 1580 struct tape_3590_disc_data *data; 1581 struct tape_3590_rdc_data *rdc_data; 1582 1583 DBF_EVENT(6, "3590 device setup\n"); 1584 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); 1585 if (data == NULL) 1586 return -ENOMEM; 1587 data->read_back_op = READ_PREVIOUS; 1588 device->discdata = data; 1589 1590 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); 1591 if (!rdc_data) { 1592 rc = -ENOMEM; 1593 goto fail_kmalloc; 1594 } 1595 rc = tape_3590_read_dev_chars(device, rdc_data); 1596 if (rc) { 1597 DBF_LH(3, "Read device characteristics failed!\n"); 1598 goto fail_rdc_data; 1599 } 1600 rc = tape_std_assign(device); 1601 if (rc) 1602 goto fail_rdc_data; 1603 if (rdc_data->data[31] == 0x13) { 1604 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; 1605 tape_3592_disable_crypt(device); 1606 } else { 1607 DBF_EVENT(6, "Device has NO crypto support\n"); 1608 } 1609 /* Try to find out if medium is loaded */ 1610 rc = tape_3590_sense_medium(device); 1611 if (rc) { 1612 DBF_LH(3, "3590 medium sense returned %d\n", rc); 1613 goto fail_rdc_data; 1614 } 1615 return 0; 1616 1617fail_rdc_data: 1618 kfree(rdc_data); 1619fail_kmalloc: 1620 kfree(data); 1621 return rc; 1622} 1623 1624/* 1625 * Cleanup device function 1626 */ 1627static void 1628tape_3590_cleanup_device(struct tape_device *device) 1629{ 1630 flush_scheduled_work(); 1631 tape_std_unassign(device); 1632 1633 kfree(device->discdata); 1634 device->discdata = NULL; 1635} 1636 1637/* 1638 * List of 3590 magnetic tape commands. 1639 */ 1640static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { 1641 [MTRESET] = tape_std_mtreset, 1642 [MTFSF] = tape_std_mtfsf, 1643 [MTBSF] = tape_std_mtbsf, 1644 [MTFSR] = tape_std_mtfsr, 1645 [MTBSR] = tape_std_mtbsr, 1646 [MTWEOF] = tape_std_mtweof, 1647 [MTREW] = tape_std_mtrew, 1648 [MTOFFL] = tape_std_mtoffl, 1649 [MTNOP] = tape_std_mtnop, 1650 [MTRETEN] = tape_std_mtreten, 1651 [MTBSFM] = tape_std_mtbsfm, 1652 [MTFSFM] = tape_std_mtfsfm, 1653 [MTEOM] = tape_std_mteom, 1654 [MTERASE] = tape_std_mterase, 1655 [MTRAS1] = NULL, 1656 [MTRAS2] = NULL, 1657 [MTRAS3] = NULL, 1658 [MTSETBLK] = tape_std_mtsetblk, 1659 [MTSETDENSITY] = NULL, 1660 [MTSEEK] = tape_3590_mtseek, 1661 [MTTELL] = tape_3590_mttell, 1662 [MTSETDRVBUFFER] = NULL, 1663 [MTFSS] = NULL, 1664 [MTBSS] = NULL, 1665 [MTWSM] = NULL, 1666 [MTLOCK] = NULL, 1667 [MTUNLOCK] = NULL, 1668 [MTLOAD] = tape_std_mtload, 1669 [MTUNLOAD] = tape_std_mtunload, 1670 [MTCOMPRESSION] = tape_std_mtcompression, 1671 [MTSETPART] = NULL, 1672 [MTMKPART] = NULL 1673}; 1674 1675/* 1676 * Tape discipline structure for 3590. 1677 */ 1678static struct tape_discipline tape_discipline_3590 = { 1679 .owner = THIS_MODULE, 1680 .setup_device = tape_3590_setup_device, 1681 .cleanup_device = tape_3590_cleanup_device, 1682 .process_eov = tape_std_process_eov, 1683 .irq = tape_3590_irq, 1684 .read_block = tape_std_read_block, 1685 .write_block = tape_std_write_block, 1686#ifdef CONFIG_S390_TAPE_BLOCK 1687 .bread = tape_3590_bread, 1688 .free_bread = tape_3590_free_bread, 1689 .check_locate = tape_3590_check_locate, 1690#endif 1691 .ioctl_fn = tape_3590_ioctl, 1692 .mtop_array = tape_3590_mtop 1693}; 1694 1695static struct ccw_device_id tape_3590_ids[] = { 1696 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, 1697 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, 1698 { /* end of list */ } 1699}; 1700 1701static int 1702tape_3590_online(struct ccw_device *cdev) 1703{ 1704 return tape_generic_online(dev_get_drvdata(&cdev->dev), 1705 &tape_discipline_3590); 1706} 1707 1708static struct ccw_driver tape_3590_driver = { 1709 .name = "tape_3590", 1710 .owner = THIS_MODULE, 1711 .ids = tape_3590_ids, 1712 .probe = tape_generic_probe, 1713 .remove = tape_generic_remove, 1714 .set_offline = tape_generic_offline, 1715 .set_online = tape_3590_online, 1716 .freeze = tape_generic_pm_suspend, 1717}; 1718 1719/* 1720 * Setup discipline structure. 1721 */ 1722static int 1723tape_3590_init(void) 1724{ 1725 int rc; 1726 1727 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); 1728 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); 1729#ifdef DBF_LIKE_HELL 1730 debug_set_level(TAPE_DBF_AREA, 6); 1731#endif 1732 1733 DBF_EVENT(3, "3590 init\n"); 1734 /* Register driver for 3590 tapes. */ 1735 rc = ccw_driver_register(&tape_3590_driver); 1736 if (rc) 1737 DBF_EVENT(3, "3590 init failed\n"); 1738 else 1739 DBF_EVENT(3, "3590 registered\n"); 1740 return rc; 1741} 1742 1743static void 1744tape_3590_exit(void) 1745{ 1746 ccw_driver_unregister(&tape_3590_driver); 1747 1748 debug_unregister(TAPE_DBF_AREA); 1749} 1750 1751MODULE_DEVICE_TABLE(ccw, tape_3590_ids); 1752MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); 1753MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); 1754MODULE_LICENSE("GPL"); 1755 1756module_init(tape_3590_init); 1757module_exit(tape_3590_exit); 1758