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   1 /*
   2  *  drivers/s390/char/tape_3590.c
   3  *    tape device discipline for 3590 tapes.
   4  *
   5  *    Copyright (C) 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/config.h>
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/bio.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:                  BRA
  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 /*
  99  * 3590 IOCTL Overload
 100  */
 101 static int
 102 tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg)
 103 {
 104         switch (cmd) {
 105         case TAPE390_DISPLAY: {
 106                 struct display_struct disp;
 107
 108                 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp)))
 109                         return -EFAULT;
 110
 111                 return tape_std_display(device, &disp);
 112         }
 113         default:
 114                 return -EINVAL; /* no additional ioctls */
 115         }
 116 }
 117
 118 /*
 119  * SENSE Medium: Get Sense data about medium state
 120  */
 121 static int
 122 tape_3590_sense_medium(struct tape_device *device)
 123 {
 124         struct tape_request *request;
 125
 126         request = tape_alloc_request(1, 128);
 127         if (IS_ERR(request))
 128                 return PTR_ERR(request);
 129         request->op = TO_MSEN;
 130         tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata);
 131         return tape_do_io_free(device, request);
 132 }
 133
 134 /*
 135  * MTTELL: Tell block. Return the number of block relative to current file.
 136  */
 137 static int
 138 tape_3590_mttell(struct tape_device *device, int mt_count)
 139 {
 140         __u64 block_id;
 141         int rc;
 142
 143         rc = tape_std_read_block_id(device, &block_id);
 144         if (rc)
 145                 return rc;
 146         return block_id >> 32;
 147 }
 148
 149 /*
 150  * MTSEEK: seek to the specified block.
 151  */
 152 static int
 153 tape_3590_mtseek(struct tape_device *device, int count)
 154 {
 155         struct tape_request *request;
 156
 157         DBF_EVENT(6, "xsee id: %x\n", count);
 158         request = tape_alloc_request(3, 4);
 159         if (IS_ERR(request))
 160                 return PTR_ERR(request);
 161         request->op = TO_LBL;
 162         tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
 163         *(__u32 *) request->cpdata = count;
 164         tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
 165         tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
 166         return tape_do_io_free(device, request);
 167 }
 168
 169 /*
 170  * Read Opposite Error Recovery Function:
 171  * Used, when Read Forward does not work
 172  */
 173 static void
 174 tape_3590_read_opposite(struct tape_device *device,
 175                         struct tape_request *request)
 176 {
 177         struct tape_3590_disc_data *data;
 178
 179         /*
 180          * We have allocated 4 ccws in tape_std_read, so we can now
 181          * transform the request to a read backward, followed by a
 182          * forward space block.
 183          */
 184         request->op = TO_RBA;
 185         tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
 186         data = device->discdata;
 187         tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op,
 188                          device->char_data.idal_buf);
 189         tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL);
 190         tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL);
 191         DBF_EVENT(6, "xrop ccwg\n");
 192 }
 193
 194 /*
 195  * Read Attention Msg
 196  * This should be done after an interrupt with attention bit (0x80)
 197  * in device state.
 198  *
 199  * After a "read attention message" request there are two possible
 200  * results:
 201  *
 202  * 1. A unit check is presented, when attention sense is present (e.g. when
 203  * a medium has been unloaded). The attention sense comes then
 204  * together with the unit check. The recovery action is either "retry"
 205  * (in case there is an attention message pending) or "permanent error".
 206  *
 207  * 2. The attention msg is written to the "read subsystem data" buffer.
 208  * In this case we probably should print it to the console.
 209  */
 210 static int
 211 tape_3590_read_attmsg(struct tape_device *device)
 212 {
 213         struct tape_request *request;
 214         char *buf;
 215
 216         request = tape_alloc_request(3, 4096);
 217         if (IS_ERR(request))
 218                 return PTR_ERR(request);
 219         request->op = TO_READ_ATTMSG;
 220         buf = request->cpdata;
 221         buf[0] = PREP_RD_SS_DATA;
 222         buf[6] = RD_ATTMSG;     /* read att msg */
 223         tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf);
 224         tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12);
 225         tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
 226         return tape_do_io_free(device, request);
 227 }
 228
 229 /*
 230  * These functions are used to schedule follow-up actions from within an
 231  * interrupt context (like unsolicited interrupts).
 232  */
 233 struct work_handler_data {
 234         struct tape_device *device;
 235         enum tape_op        op;
 236         struct work_struct  work;
 237 };
 238
 239 static void
 240 tape_3590_work_handler(void *data)
 241 {
 242         struct work_handler_data *p = data;
 243
 244         switch (p->op) {
 245         case TO_MSEN:
 246                 tape_3590_sense_medium(p->device);
 247                 break;
 248         case TO_READ_ATTMSG:
 249                 tape_3590_read_attmsg(p->device);
 250                 break;
 251         default:
 252                 DBF_EVENT(3, "T3590: work handler undefined for "
 253                           "operation 0x%02x\n", p->op);
 254         }
 255         tape_put_device(p->device);
 256         kfree(p);
 257 }
 258
 259 static int
 260 tape_3590_schedule_work(struct tape_device *device, enum tape_op op)
 261 {
 262         struct work_handler_data *p;
 263
 264         if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
 265                 return -ENOMEM;
 266
 267         INIT_WORK(&p->work, tape_3590_work_handler, p);
 268
 269         p->device = tape_get_device_reference(device);
 270         p->op = op;
 271
 272         schedule_work(&p->work);
 273         return 0;
 274 }
 275
 276 #ifdef CONFIG_S390_TAPE_BLOCK
 277 /*
 278  * Tape Block READ
 279  */
 280 static struct tape_request *
 281 tape_3590_bread(struct tape_device *device, struct request *req)
 282 {
 283         struct tape_request *request;
 284         struct ccw1 *ccw;
 285         int count = 0, start_block, i;
 286         unsigned off;
 287         char *dst;
 288         struct bio_vec *bv;
 289         struct bio *bio;
 290
 291         DBF_EVENT(6, "xBREDid:");
 292         start_block = req->sector >> TAPEBLOCK_HSEC_S2B;
 293         DBF_EVENT(6, "start_block = %i\n", start_block);
 294
 295         rq_for_each_bio(bio, req) {
 296                 bio_for_each_segment(bv, bio, i) {
 297                         count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
 298                 }
 299         }
 300         request = tape_alloc_request(2 + count + 1, 4);
 301         if (IS_ERR(request))
 302                 return request;
 303         request->op = TO_BLOCK;
 304         *(__u32 *) request->cpdata = start_block;
 305         ccw = request->cpaddr;
 306         ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte);
 307
 308         /*
 309          * We always setup a nop after the mode set ccw. This slot is
 310          * used in tape_std_check_locate to insert a locate ccw if the
 311          * current tape position doesn't match the start block to be read.
 312          */
 313         ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
 314
 315         rq_for_each_bio(bio, req) {
 316                 bio_for_each_segment(bv, bio, i) {
 317                         dst = page_address(bv->bv_page) + bv->bv_offset;
 318                         for (off = 0; off < bv->bv_len;
 319                              off += TAPEBLOCK_HSEC_SIZE) {
 320                                 ccw->flags = CCW_FLAG_CC;
 321                                 ccw->cmd_code = READ_FORWARD;
 322                                 ccw->count = TAPEBLOCK_HSEC_SIZE;
 323                                 set_normalized_cda(ccw, (void *) __pa(dst));
 324                                 ccw++;
 325                                 dst += TAPEBLOCK_HSEC_SIZE;
 326                         }
 327                         if (off > bv->bv_len)
 328                                 BUG();
 329                 }
 330         }
 331         ccw = tape_ccw_end(ccw, NOP, 0, NULL);
 332         DBF_EVENT(6, "xBREDccwg\n");
 333         return request;
 334 }
 335
 336 static void
 337 tape_3590_free_bread(struct tape_request *request)
 338 {
 339         struct ccw1 *ccw;
 340
 341         /* Last ccw is a nop and doesn't need clear_normalized_cda */
 342         for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++)
 343                 if (ccw->cmd_code == READ_FORWARD)
 344                         clear_normalized_cda(ccw);
 345         tape_free_request(request);
 346 }
 347
 348 /*
 349  * check_locate is called just before the tape request is passed to
 350  * the common io layer for execution. It has to check the current
 351  * tape position and insert a locate ccw if it doesn't match the
 352  * start block for the request.
 353  */
 354 static void
 355 tape_3590_check_locate(struct tape_device *device, struct tape_request *request)
 356 {
 357         __u32 *start_block;
 358
 359         start_block = (__u32 *) request->cpdata;
 360         if (*start_block != device->blk_data.block_position) {
 361                 /* Add the start offset of the file to get the real block. */
 362                 *start_block += device->bof;
 363                 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
 364         }
 365 }
 366 #endif
 367
 368 /*
 369  * The done handler is called at device/channel end and wakes up the sleeping
 370  * process
 371  */
 372 static int
 373 tape_3590_done(struct tape_device *device, struct tape_request *request)
 374 {
 375         struct tape_3590_med_sense *sense;
 376
 377         DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]);
 378
 379         switch (request->op) {
 380         case TO_BSB:
 381         case TO_BSF:
 382         case TO_DSE:
 383         case TO_FSB:
 384         case TO_FSF:
 385         case TO_LBL:
 386         case TO_RFO:
 387         case TO_RBA:
 388         case TO_REW:
 389         case TO_WRI:
 390         case TO_WTM:
 391         case TO_BLOCK:
 392         case TO_LOAD:
 393                 tape_med_state_set(device, MS_LOADED);
 394                 break;
 395         case TO_RUN:
 396                 tape_med_state_set(device, MS_UNLOADED);
 397                 break;
 398         case TO_MSEN:
 399                 sense = (struct tape_3590_med_sense *) request->cpdata;
 400                 if (sense->masst == MSENSE_UNASSOCIATED)
 401                         tape_med_state_set(device, MS_UNLOADED);
 402                 if (sense->masst == MSENSE_ASSOCIATED_MOUNT)
 403                         tape_med_state_set(device, MS_LOADED);
 404                 break;
 405         case TO_RBI:    /* RBI seems to succeed even without medium loaded. */
 406         case TO_NOP:    /* Same to NOP. */
 407         case TO_READ_CONFIG:
 408         case TO_READ_ATTMSG:
 409         case TO_DIS:
 410         case TO_ASSIGN:
 411         case TO_UNASSIGN:
 412                 break;
 413         case TO_SIZE:
 414                 break;
 415         }
 416         return TAPE_IO_SUCCESS;
 417 }
 418
 419 /*
 420  * This fuction is called, when error recovery was successfull
 421  */
 422 static inline int
 423 tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request)
 424 {
 425         DBF_EVENT(3, "Error Recovery successfull for %s\n",
 426                   tape_op_verbose[request->op]);
 427         return tape_3590_done(device, request);
 428 }
 429
 430 /*
 431  * This fuction is called, when error recovery was not successfull
 432  */
 433 static inline int
 434 tape_3590_erp_failed(struct tape_device *device, struct tape_request *request,
 435                      struct irb *irb, int rc)
 436 {
 437         DBF_EVENT(3, "Error Recovery failed for %s\n",
 438                   tape_op_verbose[request->op]);
 439         tape_dump_sense_dbf(device, request, irb);
 440         return rc;
 441 }
 442
 443 /*
 444  * Error Recovery do retry
 445  */
 446 static inline int
 447 tape_3590_erp_retry(struct tape_device *device, struct tape_request *request,
 448                     struct irb *irb)
 449 {
 450         DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]);
 451         tape_dump_sense_dbf(device, request, irb);
 452         return TAPE_IO_RETRY;
 453 }
 454
 455 /*
 456  * Handle unsolicited interrupts
 457  */
 458 static int
 459 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb)
 460 {
 461         if (irb->scsw.dstat == DEV_STAT_CHN_END)
 462                 /* Probably result of halt ssch */
 463                 return TAPE_IO_PENDING;
 464         else if (irb->scsw.dstat == 0x85)
 465                 /* Device Ready -> check medium state */
 466                 tape_3590_schedule_work(device, TO_MSEN);
 467         else if (irb->scsw.dstat & DEV_STAT_ATTENTION)
 468                 tape_3590_schedule_work(device, TO_READ_ATTMSG);
 469         else {
 470                 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id);
 471                 PRINT_WARN("Unsolicited IRQ (Device End) caught.\n");
 472                 tape_dump_sense(device, NULL, irb);
 473         }
 474         return TAPE_IO_SUCCESS;
 475 }
 476
 477 /*
 478  * Basic Recovery routine
 479  */
 480 static int
 481 tape_3590_erp_basic(struct tape_device *device, struct tape_request *request,
 482                     struct irb *irb, int rc)
 483 {
 484         struct tape_3590_sense *sense;
 485
 486         sense = (struct tape_3590_sense *) irb->ecw;
 487
 488         switch (sense->bra) {
 489         case SENSE_BRA_PER:
 490                 return tape_3590_erp_failed(device, request, irb, rc);
 491         case SENSE_BRA_CONT:
 492                 return tape_3590_erp_succeded(device, request);
 493         case SENSE_BRA_RE:
 494                 return tape_3590_erp_retry(device, request, irb);
 495         case SENSE_BRA_DRE:
 496                 return tape_3590_erp_failed(device, request, irb, rc);
 497         default:
 498                 PRINT_ERR("Unknown BRA %x - This should not happen!\n",
 499                           sense->bra);
 500                 BUG();
 501                 return TAPE_IO_STOP;
 502         }
 503 }
 504
 505 /*
 506  *  RDL: Read Device (buffered) log
 507  */
 508 static int
 509 tape_3590_erp_read_buf_log(struct tape_device *device,
 510                            struct tape_request *request, struct irb *irb)
 511 {
 512         /*
 513          * We just do the basic error recovery at the moment (retry).
 514          * Perhaps in the future, we read the log and dump it somewhere...
 515          */
 516         return tape_3590_erp_basic(device, request, irb, -EIO);
 517 }
 518
 519 /*
 520  *  SWAP: Swap Devices
 521  */
 522 static int
 523 tape_3590_erp_swap(struct tape_device *device, struct tape_request *request,
 524                    struct irb *irb)
 525 {
 526         /*
 527          * This error recovery should swap the tapes
 528          * if the original has a problem. The operation
 529          * should proceed with the new tape... this
 530          * should probably be done in user space!
 531          */
 532         PRINT_WARN("(%s): Swap Tape Device!\n", device->cdev->dev.bus_id);
 533         return tape_3590_erp_basic(device, request, irb, -EIO);
 534 }
 535
 536 /*
 537  *  LBY: Long Busy
 538  */
 539 static int
 540 tape_3590_erp_long_busy(struct tape_device *device,
 541                         struct tape_request *request, struct irb *irb)
 542 {
 543         /* FIXME: how about WAITING for a minute ? */
 544         PRINT_WARN("(%s): Device is busy! Please wait a minute!\n",
 545                    device->cdev->dev.bus_id);
 546         return tape_3590_erp_basic(device, request, irb, -EBUSY);
 547 }
 548
 549 /*
 550  *  SPI: Special Intercept
 551  */
 552 static int
 553 tape_3590_erp_special_interrupt(struct tape_device *device,
 554                                 struct tape_request *request, struct irb *irb)
 555 {
 556         return tape_3590_erp_basic(device, request, irb, -EIO);
 557 }
 558
 559 /*
 560  *  RDA: Read Alternate
 561  */
 562 static int
 563 tape_3590_erp_read_alternate(struct tape_device *device,
 564                              struct tape_request *request, struct irb *irb)
 565 {
 566         struct tape_3590_disc_data *data;
 567
 568         /*
 569          * The issued Read Backward or Read Previous command is not
 570          * supported by the device
 571          * The recovery action should be to issue another command:
 572          * Read Revious: if Read Backward is not supported
 573          * Read Backward: if Read Previous is not supported
 574          */
 575         data = device->discdata;
 576         if (data->read_back_op == READ_PREVIOUS) {
 577                 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",
 578                           device->cdev_id);
 579                 data->read_back_op = READ_BACKWARD;
 580         } else {
 581                 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",
 582                           device->cdev_id);
 583                 data->read_back_op = READ_PREVIOUS;
 584         }
 585         tape_3590_read_opposite(device, request);
 586         return tape_3590_erp_retry(device, request, irb);
 587 }
 588
 589 /*
 590  * Error Recovery read opposite
 591  */
 592 static int
 593 tape_3590_erp_read_opposite(struct tape_device *device,
 594                             struct tape_request *request, struct irb *irb)
 595 {
 596         switch (request->op) {
 597         case TO_RFO:
 598                 /*
 599                  * We did read forward, but the data could not be read.
 600                  * We will read backward and then skip forward again.
 601                  */
 602                 tape_3590_read_opposite(device, request);
 603                 return tape_3590_erp_retry(device, request, irb);
 604         case TO_RBA:
 605                 /* We tried to read forward and backward, but hat no success */
 606                 return tape_3590_erp_failed(device, request, irb, -EIO);
 607                 break;
 608         default:
 609                 PRINT_WARN("read_opposite_recovery_called_with_op: %s\n",
 610                            tape_op_verbose[request->op]);
 611                 return tape_3590_erp_failed(device, request, irb, -EIO);
 612         }
 613 }
 614
 615 /*
 616  * Print an MIM (Media Information  Message) (message code f0)
 617  */
 618 static void
 619 tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb)
 620 {
 621         struct tape_3590_sense *sense;
 622
 623         sense = (struct tape_3590_sense *) irb->ecw;
 624         /* Exception Message */
 625         switch (sense->fmt.f70.emc) {
 626         case 0x02:
 627                 PRINT_WARN("(%s): Data degraded\n", device->cdev->dev.bus_id);
 628                 break;
 629         case 0x03:
 630                 PRINT_WARN("(%s): Data degraded in partion %i\n",
 631                            device->cdev->dev.bus_id, sense->fmt.f70.mp);
 632                 break;
 633         case 0x04:
 634                 PRINT_WARN("(%s): Medium degraded\n", device->cdev->dev.bus_id);
 635                 break;
 636         case 0x05:
 637                 PRINT_WARN("(%s): Medium degraded in partition %i\n",
 638                            device->cdev->dev.bus_id, sense->fmt.f70.mp);
 639                 break;
 640         case 0x06:
 641                 PRINT_WARN("(%s): Block 0 Error\n", device->cdev->dev.bus_id);
 642                 break;
 643         case 0x07:
 644                 PRINT_WARN("(%s): Medium Exception 0x%02x\n",
 645                            device->cdev->dev.bus_id, sense->fmt.f70.md);
 646                 break;
 647         default:
 648                 PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n",
 649                            device->cdev->dev.bus_id, sense->fmt.f70.emc);
 650                 break;
 651         }
 652         /* Service Message */
 653         switch (sense->fmt.f70.smc) {
 654         case 0x02:
 655                 PRINT_WARN("(%s): Reference Media maintenance procedure %i\n",
 656                            device->cdev->dev.bus_id, sense->fmt.f70.md);
 657                 break;
 658         default:
 659                 PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n",
 660                            device->cdev->dev.bus_id, sense->fmt.f70.smc);
 661                 break;
 662         }
 663 }
 664
 665 /*
 666  * Print an I/O Subsystem Service Information Message (message code f1)
 667  */
 668 static void
 669 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb)
 670 {
 671         struct tape_3590_sense *sense;
 672
 673         sense = (struct tape_3590_sense *) irb->ecw;
 674         /* Exception Message */
 675         switch (sense->fmt.f71.emc) {
 676         case 0x01:
 677                 PRINT_WARN("(%s): Effect of failure is unknown\n",
 678                            device->cdev->dev.bus_id);
 679                 break;
 680         case 0x02:
 681                 PRINT_WARN("(%s): CU Exception - no performance impact\n",
 682                            device->cdev->dev.bus_id);
 683                 break;
 684         case 0x03:
 685                 PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n",
 686                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 687                 break;
 688         case 0x04:
 689                 PRINT_WARN("(%s): CU Exception on device path 0x%02x\n",
 690                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 691                 break;
 692         case 0x05:
 693                 PRINT_WARN("(%s): CU Exception on library path 0x%02x\n",
 694                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 695                 break;
 696         case 0x06:
 697                 PRINT_WARN("(%s): CU Exception on node 0x%02x\n",
 698                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 699                 break;
 700         case 0x07:
 701                 PRINT_WARN("(%s): CU Exception on partition 0x%02x\n",
 702                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 703                 break;
 704         default:
 705                 PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n",
 706                            device->cdev->dev.bus_id, sense->fmt.f71.emc);
 707         }
 708         /* Service Message */
 709         switch (sense->fmt.f71.smc) {
 710         case 0x01:
 711                 PRINT_WARN("(%s): Repair impact is unknown\n",
 712                            device->cdev->dev.bus_id);
 713                 break;
 714         case 0x02:
 715                 PRINT_WARN("(%s): Repair will not impact cu performance\n",
 716                            device->cdev->dev.bus_id);
 717                 break;
 718         case 0x03:
 719                 if (sense->fmt.f71.mdf == 0)
 720                         PRINT_WARN("(%s): Repair will disable node "
 721                                    "0x%x on CU\n",
 722                                    device->cdev->dev.bus_id,
 723                                    sense->fmt.f71.md[1]);
 724                 else
 725                         PRINT_WARN("(%s): Repair will disable nodes "
 726                                    "(0x%x-0x%x) on CU\n",
 727                                    device->cdev->dev.bus_id,
 728                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 729                 break;
 730         case 0x04:
 731                 if (sense->fmt.f71.mdf == 0)
 732                         PRINT_WARN("(%s): Repair will disable cannel path "
 733                                    "0x%x on CU\n",
 734                                    device->cdev->dev.bus_id,
 735                                    sense->fmt.f71.md[1]);
 736                 else
 737                         PRINT_WARN("(%s): Repair will disable cannel paths "
 738                                    "(0x%x-0x%x) on CU\n",
 739                                    device->cdev->dev.bus_id,
 740                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 741                 break;
 742         case 0x05:
 743                 if (sense->fmt.f71.mdf == 0)
 744                         PRINT_WARN("(%s): Repair will disable device path "
 745                                    "0x%x on CU\n",
 746                                    device->cdev->dev.bus_id,
 747                                    sense->fmt.f71.md[1]);
 748                 else
 749                         PRINT_WARN("(%s): Repair will disable device paths "
 750                                    "(0x%x-0x%x) on CU\n",
 751                                    device->cdev->dev.bus_id,
 752                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 753                 break;
 754         case 0x06:
 755                 if (sense->fmt.f71.mdf == 0)
 756                         PRINT_WARN("(%s): Repair will disable library path "
 757                                    "0x%x on CU\n",
 758                                    device->cdev->dev.bus_id,
 759                                    sense->fmt.f71.md[1]);
 760                 else
 761                         PRINT_WARN("(%s): Repair will disable library paths "
 762                                    "(0x%x-0x%x) on CU\n",
 763                                    device->cdev->dev.bus_id,
 764                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 765                 break;
 766         case 0x07:
 767                 PRINT_WARN("(%s): Repair will disable access to CU\n",
 768                            device->cdev->dev.bus_id);
 769                 break;
 770         default:
 771                 PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n",
 772                            device->cdev->dev.bus_id, sense->fmt.f71.smc);
 773         }
 774 }
 775
 776 /*
 777  * Print an Device Subsystem Service Information Message (message code f2)
 778  */
 779 static void
 780 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb)
 781 {
 782         struct tape_3590_sense *sense;
 783
 784         sense = (struct tape_3590_sense *) irb->ecw;
 785         /* Exception Message */
 786         switch (sense->fmt.f71.emc) {
 787         case 0x01:
 788                 PRINT_WARN("(%s): Effect of failure is unknown\n",
 789                            device->cdev->dev.bus_id);
 790                 break;
 791         case 0x02:
 792                 PRINT_WARN("(%s): DV Exception - no performance impact\n",
 793                            device->cdev->dev.bus_id);
 794                 break;
 795         case 0x03:
 796                 PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n",
 797                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 798                 break;
 799         case 0x04:
 800                 PRINT_WARN("(%s): DV Exception on loader 0x%02x\n",
 801                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 802                 break;
 803         case 0x05:
 804                 PRINT_WARN("(%s): DV Exception on message display 0x%02x\n",
 805                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 806                 break;
 807         case 0x06:
 808                 PRINT_WARN("(%s): DV Exception in tape path\n",
 809                            device->cdev->dev.bus_id);
 810                 break;
 811         case 0x07:
 812                 PRINT_WARN("(%s): DV Exception in drive\n",
 813                            device->cdev->dev.bus_id);
 814                 break;
 815         default:
 816                 PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n",
 817                            device->cdev->dev.bus_id, sense->fmt.f71.emc);
 818         }
 819         /* Service Message */
 820         switch (sense->fmt.f71.smc) {
 821         case 0x01:
 822                 PRINT_WARN("(%s): Repair impact is unknown\n",
 823                            device->cdev->dev.bus_id);
 824                 break;
 825         case 0x02:
 826                 PRINT_WARN("(%s): Repair will not impact device performance\n",
 827                            device->cdev->dev.bus_id);
 828                 break;
 829         case 0x03:
 830                 if (sense->fmt.f71.mdf == 0)
 831                         PRINT_WARN("(%s): Repair will disable channel path "
 832                                    "0x%x on DV\n",
 833                                    device->cdev->dev.bus_id,
 834                                    sense->fmt.f71.md[1]);
 835                 else
 836                         PRINT_WARN("(%s): Repair will disable channel path "
 837                                    "(0x%x-0x%x) on DV\n",
 838                                    device->cdev->dev.bus_id,
 839                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 840                 break;
 841         case 0x04:
 842                 if (sense->fmt.f71.mdf == 0)
 843                         PRINT_WARN("(%s): Repair will disable interface 0x%x "
 844                                    "on DV\n",
 845                                    device->cdev->dev.bus_id,
 846                                    sense->fmt.f71.md[1]);
 847                 else
 848                         PRINT_WARN("(%s): Repair will disable interfaces "
 849                                    "(0x%x-0x%x) on DV\n",
 850                                    device->cdev->dev.bus_id,
 851                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 852                 break;
 853         case 0x05:
 854                 if (sense->fmt.f71.mdf == 0)
 855                         PRINT_WARN("(%s): Repair will disable loader 0x%x "
 856                                    "on DV\n",
 857                                    device->cdev->dev.bus_id,
 858                                    sense->fmt.f71.md[1]);
 859                 else
 860                         PRINT_WARN("(%s): Repair will disable loader "
 861                                    "(0x%x-0x%x) on DV\n",
 862                                    device->cdev->dev.bus_id,
 863                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 864                 break;
 865         case 0x07:
 866                 PRINT_WARN("(%s): Repair will disable access to DV\n",
 867                            device->cdev->dev.bus_id);
 868                 break;
 869         case 0x08:
 870                 if (sense->fmt.f71.mdf == 0)
 871                         PRINT_WARN("(%s): Repair will disable message "
 872                                    "display 0x%x on DV\n",
 873                                    device->cdev->dev.bus_id,
 874                                    sense->fmt.f71.md[1]);
 875                 else
 876                         PRINT_WARN("(%s): Repair will disable message "
 877                                    "displays (0x%x-0x%x) on DV\n",
 878                                    device->cdev->dev.bus_id,
 879                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 880                 break;
 881         case 0x09:
 882                 PRINT_WARN("(%s): Clean DV\n", device->cdev->dev.bus_id);
 883                 break;
 884         default:
 885                 PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n",
 886                            device->cdev->dev.bus_id, sense->fmt.f71.smc);
 887         }
 888 }
 889
 890 /*
 891  * Print standard ERA Message
 892  */
 893 static void
 894 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb)
 895 {
 896         struct tape_3590_sense *sense;
 897
 898         sense = (struct tape_3590_sense *) irb->ecw;
 899         if (sense->mc == 0)
 900                 return;
 901         if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) {
 902                 if (tape_3590_msg[sense->mc] != NULL)
 903                         PRINT_WARN("(%s): %s\n", device->cdev->dev.bus_id,
 904                                    tape_3590_msg[sense->mc]);
 905                 else {
 906                         PRINT_WARN("(%s): Message Code 0x%x\n",
 907                                    device->cdev->dev.bus_id, sense->mc);
 908                 }
 909                 return;
 910         }
 911         if (sense->mc == 0xf0) {
 912                 /* Standard Media Information Message */
 913                 PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, "
 914                            "RC=%02x-%04x-%02x\n", device->cdev->dev.bus_id,
 915                            sense->fmt.f70.sev, sense->mc,
 916                            sense->fmt.f70.emc, sense->fmt.f70.smc,
 917                            sense->fmt.f70.refcode, sense->fmt.f70.mid,
 918                            sense->fmt.f70.fid);
 919                 tape_3590_print_mim_msg_f0(device, irb);
 920                 return;
 921         }
 922         if (sense->mc == 0xf1) {
 923                 /* Standard I/O Subsystem Service Information Message */
 924                 PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, "
 925                            "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
 926                            device->cdev->dev.bus_id, sense->fmt.f71.sev,
 927                            device->cdev->id.dev_model,
 928                            sense->mc, sense->fmt.f71.emc,
 929                            sense->fmt.f71.smc, sense->fmt.f71.refcode1,
 930                            sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
 931                 tape_3590_print_io_sim_msg_f1(device, irb);
 932                 return;
 933         }
 934         if (sense->mc == 0xf2) {
 935                 /* Standard Device Service Information Message */
 936                 PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, "
 937                            "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
 938                            device->cdev->dev.bus_id, sense->fmt.f71.sev,
 939                            device->cdev->id.dev_model,
 940                            sense->mc, sense->fmt.f71.emc,
 941                            sense->fmt.f71.smc, sense->fmt.f71.refcode1,
 942                            sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
 943                 tape_3590_print_dev_sim_msg_f2(device, irb);
 944                 return;
 945         }
 946         if (sense->mc == 0xf3) {
 947                 /* Standard Library Service Information Message */
 948                 return;
 949         }
 950         PRINT_WARN("(%s): Device Message(%x)\n",
 951                    device->cdev->dev.bus_id, sense->mc);
 952 }
 953
 954 /*
 955  *  3590 error Recovery routine:
 956  *  If possible, it tries to recover from the error. If this is not possible,
 957  *  inform the user about the problem.
 958  */
 959 static int
 960 tape_3590_unit_check(struct tape_device *device, struct tape_request *request,
 961                      struct irb *irb)
 962 {
 963         struct tape_3590_sense *sense;
 964         int rc;
 965
 966 #ifdef CONFIG_S390_TAPE_BLOCK
 967         if (request->op == TO_BLOCK) {
 968                 /*
 969                  * Recovery for block device requests. Set the block_position
 970                  * to something invalid and retry.
 971                  */
 972                 device->blk_data.block_position = -1;
 973                 if (request->retries-- <= 0)
 974                         return tape_3590_erp_failed(device, request, irb, -EIO);
 975                 else
 976                         return tape_3590_erp_retry(device, request, irb);
 977         }
 978 #endif
 979
 980         sense = (struct tape_3590_sense *) irb->ecw;
 981
 982         /*
 983          * First check all RC-QRCs where we want to do something special
 984          *   - "break":     basic error recovery is done
 985          *   - "goto out:": just print error message if available
 986          */
 987         rc = -EIO;
 988         switch (sense->rc_rqc) {
 989
 990         case 0x1110:
 991                 tape_3590_print_era_msg(device, irb);
 992                 return tape_3590_erp_read_buf_log(device, request, irb);
 993
 994         case 0x2011:
 995                 tape_3590_print_era_msg(device, irb);
 996                 return tape_3590_erp_read_alternate(device, request, irb);
 997
 998         case 0x2230:
 999         case 0x2231:
1000                 tape_3590_print_era_msg(device, irb);
1001                 return tape_3590_erp_special_interrupt(device, request, irb);
1002
1003         case 0x3010:
1004                 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n",
1005                           device->cdev_id);
1006                 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1007         case 0x3012:
1008                 DBF_EVENT(2, "(%08x): Forward at End of Partition\n",
1009                           device->cdev_id);
1010                 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1011         case 0x3020:
1012                 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id);
1013                 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1014
1015         case 0x3122:
1016                 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n",
1017                           device->cdev_id);
1018                 return tape_3590_erp_basic(device, request, irb, -EIO);
1019         case 0x3123:
1020                 DBF_EVENT(2, "(%08x): Rewind Unload complete\n",
1021                           device->cdev_id);
1022                 tape_med_state_set(device, MS_UNLOADED);
1023                 return tape_3590_erp_basic(device, request, irb, 0);
1024
1025         case 0x4010:
1026                 /*
1027                  * print additional msg since default msg
1028                  * "device intervention" is not very meaningfull
1029                  */
1030                 PRINT_WARN("(%s): Tape operation when medium not loaded\n",
1031                            device->cdev->dev.bus_id);
1032                 tape_med_state_set(device, MS_UNLOADED);
1033                 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1034         case 0x4012:            /* Device Long Busy */
1035                 tape_3590_print_era_msg(device, irb);
1036                 return tape_3590_erp_long_busy(device, request, irb);
1037
1038         case 0x5010:
1039                 if (sense->rac == 0xd0) {
1040                         /* Swap */
1041                         tape_3590_print_era_msg(device, irb);
1042                         return tape_3590_erp_swap(device, request, irb);
1043                 }
1044                 if (sense->rac == 0x26) {
1045                         /* Read Opposite */
1046                         tape_3590_print_era_msg(device, irb);
1047                         return tape_3590_erp_read_opposite(device, request,
1048                                                            irb);
1049                 }
1050                 return tape_3590_erp_basic(device, request, irb, -EIO);
1051         case 0x5020:
1052         case 0x5021:
1053         case 0x5022:
1054         case 0x5040:
1055         case 0x5041:
1056         case 0x5042:
1057                 tape_3590_print_era_msg(device, irb);
1058                 return tape_3590_erp_swap(device, request, irb);
1059
1060         case 0x5110:
1061         case 0x5111:
1062                 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1063
1064         case 0x5120:
1065         case 0x1120:
1066                 tape_med_state_set(device, MS_UNLOADED);
1067                 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1068
1069         case 0x6020:
1070                 PRINT_WARN("(%s): Cartridge of wrong type ?\n",
1071                            device->cdev->dev.bus_id);
1072                 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1073
1074         case 0x8011:
1075                 PRINT_WARN("(%s): Another host has reserved the tape device\n",
1076                            device->cdev->dev.bus_id);
1077                 return tape_3590_erp_basic(device, request, irb, -EPERM);
1078         case 0x8013:
1079                 PRINT_WARN("(%s): Another host has priviliged access to the "
1080                            "tape device\n", device->cdev->dev.bus_id);
1081                 PRINT_WARN("(%s): To solve the problem unload the current "
1082                            "cartridge!\n", device->cdev->dev.bus_id);
1083                 return tape_3590_erp_basic(device, request, irb, -EPERM);
1084         default:
1085                 return tape_3590_erp_basic(device, request, irb, -EIO);
1086         }
1087 }
1088
1089 /*
1090  * 3590 interrupt handler:
1091  */
1092 static int
1093 tape_3590_irq(struct tape_device *device, struct tape_request *request,
1094               struct irb *irb)
1095 {
1096         if (request == NULL)
1097                 return tape_3590_unsolicited_irq(device, irb);
1098
1099         if ((irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) &&
1100             (irb->scsw.dstat & DEV_STAT_DEV_END) && (request->op == TO_WRI)) {
1101                 /* Write at end of volume */
1102                 DBF_EVENT(2, "End of volume\n");
1103                 return tape_3590_erp_failed(device, request, irb, -ENOSPC);
1104         }
1105
1106         if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)
1107                 return tape_3590_unit_check(device, request, irb);
1108
1109         if (irb->scsw.dstat & DEV_STAT_DEV_END) {
1110                 if (irb->scsw.dstat == DEV_STAT_UNIT_EXCEP) {
1111                         if (request->op == TO_FSB || request->op == TO_BSB)
1112                                 request->rescnt++;
1113                         else
1114                                 DBF_EVENT(5, "Unit Exception!\n");
1115                 }
1116
1117                 return tape_3590_done(device, request);
1118         }
1119
1120         if (irb->scsw.dstat & DEV_STAT_CHN_END) {
1121                 DBF_EVENT(2, "cannel end\n");
1122                 return TAPE_IO_PENDING;
1123         }
1124
1125         if (irb->scsw.dstat & DEV_STAT_ATTENTION) {
1126                 DBF_EVENT(2, "Unit Attention when busy..\n");
1127                 return TAPE_IO_PENDING;
1128         }
1129
1130         DBF_EVENT(6, "xunknownirq\n");
1131         PRINT_ERR("Unexpected interrupt.\n");
1132         PRINT_ERR("Current op is: %s", tape_op_verbose[request->op]);
1133         tape_dump_sense(device, request, irb);
1134         return TAPE_IO_STOP;
1135 }
1136
1137 /*
1138  * Setup device function
1139  */
1140 static int
1141 tape_3590_setup_device(struct tape_device *device)
1142 {
1143         int rc;
1144         struct tape_3590_disc_data *data;
1145
1146         DBF_EVENT(6, "3590 device setup\n");
1147         data = kmalloc(sizeof(struct tape_3590_disc_data),
1148                        GFP_KERNEL | GFP_DMA);
1149         if (data == NULL)
1150                 return -ENOMEM;
1151         data->read_back_op = READ_PREVIOUS;
1152         device->discdata = data;
1153
1154         if ((rc = tape_std_assign(device)) == 0) {
1155                 /* Try to find out if medium is loaded */
1156                 if ((rc = tape_3590_sense_medium(device)) != 0)
1157                         DBF_LH(3, "3590 medium sense returned %d\n", rc);
1158         }
1159
1160         return rc;
1161 }
1162
1163 /*
1164  * Cleanup device function
1165  */
1166 static void
1167 tape_3590_cleanup_device(struct tape_device *device)
1168 {
1169         flush_scheduled_work();
1170         tape_std_unassign(device);
1171
1172         kfree(device->discdata);
1173         device->discdata = NULL;
1174 }
1175
1176 /*
1177  * List of 3590 magnetic tape commands.
1178  */
1179 static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = {
1180         [MTRESET]        = tape_std_mtreset,
1181         [MTFSF]          = tape_std_mtfsf,
1182         [MTBSF]          = tape_std_mtbsf,
1183         [MTFSR]          = tape_std_mtfsr,
1184         [MTBSR]          = tape_std_mtbsr,
1185         [MTWEOF]         = tape_std_mtweof,
1186         [MTREW]          = tape_std_mtrew,
1187         [MTOFFL]         = tape_std_mtoffl,
1188         [MTNOP]          = tape_std_mtnop,
1189         [MTRETEN]        = tape_std_mtreten,
1190         [MTBSFM]         = tape_std_mtbsfm,
1191         [MTFSFM]         = tape_std_mtfsfm,
1192         [MTEOM]          = tape_std_mteom,
1193         [MTERASE]        = tape_std_mterase,
1194         [MTRAS1]         = NULL,
1195         [MTRAS2]         = NULL,
1196         [MTRAS3]         = NULL,
1197         [MTSETBLK]       = tape_std_mtsetblk,
1198         [MTSETDENSITY]   = NULL,
1199         [MTSEEK]         = tape_3590_mtseek,
1200         [MTTELL]         = tape_3590_mttell,
1201         [MTSETDRVBUFFER] = NULL,
1202         [MTFSS]          = NULL,
1203         [MTBSS]          = NULL,
1204         [MTWSM]          = NULL,
1205         [MTLOCK]         = NULL,
1206         [MTUNLOCK]       = NULL,
1207         [MTLOAD]         = tape_std_mtload,
1208         [MTUNLOAD]       = tape_std_mtunload,
1209         [MTCOMPRESSION]  = tape_std_mtcompression,
1210         [MTSETPART]      = NULL,
1211         [MTMKPART]       = NULL
1212 };
1213
1214 /*
1215  * Tape discipline structure for 3590.
1216  */
1217 static struct tape_discipline tape_discipline_3590 = {
1218         .owner = THIS_MODULE,
1219         .setup_device = tape_3590_setup_device,
1220         .cleanup_device = tape_3590_cleanup_device,
1221         .process_eov = tape_std_process_eov,
1222         .irq = tape_3590_irq,
1223         .read_block = tape_std_read_block,
1224         .write_block = tape_std_write_block,
1225 #ifdef CONFIG_S390_TAPE_BLOCK
1226         .bread = tape_3590_bread,
1227         .free_bread = tape_3590_free_bread,
1228         .check_locate = tape_3590_check_locate,
1229 #endif
1230         .ioctl_fn = tape_3590_ioctl,
1231         .mtop_array = tape_3590_mtop
1232 };
1233
1234 static struct ccw_device_id tape_3590_ids[] = {
1235         {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590},
1236         {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592},
1237         { /* end of list */ }
1238 };
1239
1240 static int
1241 tape_3590_online(struct ccw_device *cdev)
1242 {
1243         return tape_generic_online(cdev->dev.driver_data,
1244                                    &tape_discipline_3590);
1245 }
1246
1247 static int
1248 tape_3590_offline(struct ccw_device *cdev)
1249 {
1250         return tape_generic_offline(cdev->dev.driver_data);
1251 }
1252
1253 static struct ccw_driver tape_3590_driver = {
1254         .name = "tape_3590",
1255         .owner = THIS_MODULE,
1256         .ids = tape_3590_ids,
1257         .probe = tape_generic_probe,
1258         .remove = tape_generic_remove,
1259         .set_offline = tape_3590_offline,
1260         .set_online = tape_3590_online,
1261 };
1262
1263 /*
1264  * Setup discipline structure.
1265  */
1266 static int
1267 tape_3590_init(void)
1268 {
1269         int rc;
1270
1271         TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long));
1272         debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view);
1273 #ifdef DBF_LIKE_HELL
1274         debug_set_level(TAPE_DBF_AREA, 6);
1275 #endif
1276
1277         DBF_EVENT(3, "3590 init\n");
1278         /* Register driver for 3590 tapes. */
1279         rc = ccw_driver_register(&tape_3590_driver);
1280         if (rc)
1281                 DBF_EVENT(3, "3590 init failed\n");
1282         else
1283                 DBF_EVENT(3, "3590 registered\n");
1284         return rc;
1285 }
1286
1287 static void
1288 tape_3590_exit(void)
1289 {
1290         ccw_driver_unregister(&tape_3590_driver);
1291
1292         debug_unregister(TAPE_DBF_AREA);
1293 }
1294
1295 MODULE_DEVICE_TABLE(ccw, tape_3590_ids);
1296 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation");
1297 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver");
1298 MODULE_LICENSE("GPL");
1299
1300 module_init(tape_3590_init);
1301 module_exit(tape_3590_exit);