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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/module.h>
  12 #include <linux/init.h>
  13 #include <linux/bio.h>
  14
  15 #define TAPE_DBF_AREA   tape_3590_dbf
  16
  17 #include "tape.h"
  18 #include "tape_std.h"
  19 #include "tape_3590.h"
  20
  21 /*
  22  * Pointer to debug area.
  23  */
  24 debug_info_t *TAPE_DBF_AREA = NULL;
  25 EXPORT_SYMBOL(TAPE_DBF_AREA);
  26
  27 /*******************************************************************
  28  * Error Recovery fuctions:
  29  * - Read Opposite:              implemented
  30  * - Read Device (buffered) log: BRA
  31  * - Read Library log:           BRA
  32  * - Swap Devices:               BRA
  33  * - Long Busy:                  BRA
  34  * - Special Intercept:          BRA
  35  * - Read Alternate:             implemented
  36  *******************************************************************/
  37
  38 #define PRINTK_HEADER "TAPE_3590: "
  39
  40 static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = {
  41         [0x00] = "",
  42         [0x10] = "Lost Sense",
  43         [0x11] = "Assigned Elsewhere",
  44         [0x12] = "Allegiance Reset",
  45         [0x13] = "Shared Access Violation",
  46         [0x20] = "Command Reject",
  47         [0x21] = "Configuration Error",
  48         [0x22] = "Protection Exception",
  49         [0x23] = "Write Protect",
  50         [0x24] = "Write Length",
  51         [0x25] = "Read-Only Format",
  52         [0x31] = "Beginning of Partition",
  53         [0x33] = "End of Partition",
  54         [0x34] = "End of Data",
  55         [0x35] = "Block not found",
  56         [0x40] = "Device Intervention",
  57         [0x41] = "Loader Intervention",
  58         [0x42] = "Library Intervention",
  59         [0x50] = "Write Error",
  60         [0x51] = "Erase Error",
  61         [0x52] = "Formatting Error",
  62         [0x53] = "Read Error",
  63         [0x54] = "Unsupported Format",
  64         [0x55] = "No Formatting",
  65         [0x56] = "Positioning lost",
  66         [0x57] = "Read Length",
  67         [0x60] = "Unsupported Medium",
  68         [0x61] = "Medium Length Error",
  69         [0x62] = "Medium removed",
  70         [0x64] = "Load Check",
  71         [0x65] = "Unload Check",
  72         [0x70] = "Equipment Check",
  73         [0x71] = "Bus out Check",
  74         [0x72] = "Protocol Error",
  75         [0x73] = "Interface Error",
  76         [0x74] = "Overrun",
  77         [0x75] = "Halt Signal",
  78         [0x90] = "Device fenced",
  79         [0x91] = "Device Path fenced",
  80         [0xa0] = "Volume misplaced",
  81         [0xa1] = "Volume inaccessible",
  82         [0xa2] = "Volume in input",
  83         [0xa3] = "Volume ejected",
  84         [0xa4] = "All categories reserved",
  85         [0xa5] = "Duplicate Volume",
  86         [0xa6] = "Library Manager Offline",
  87         [0xa7] = "Library Output Station full",
  88         [0xa8] = "Vision System non-operational",
  89         [0xa9] = "Library Manager Equipment Check",
  90         [0xaa] = "Library Equipment Check",
  91         [0xab] = "All Library Cells full",
  92         [0xac] = "No Cleaner Volumes in Library",
  93         [0xad] = "I/O Station door open",
  94         [0xae] = "Subsystem environmental alert",
  95 };
  96
  97 /*
  98  * 3590 IOCTL Overload
  99  */
 100 static int
 101 tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg)
 102 {
 103         switch (cmd) {
 104         case TAPE390_DISPLAY: {
 105                 struct display_struct disp;
 106
 107                 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp)))
 108                         return -EFAULT;
 109
 110                 return tape_std_display(device, &disp);
 111         }
 112         default:
 113                 return -EINVAL; /* no additional ioctls */
 114         }
 115 }
 116
 117 /*
 118  * SENSE Medium: Get Sense data about medium state
 119  */
 120 static int
 121 tape_3590_sense_medium(struct tape_device *device)
 122 {
 123         struct tape_request *request;
 124
 125         request = tape_alloc_request(1, 128);
 126         if (IS_ERR(request))
 127                 return PTR_ERR(request);
 128         request->op = TO_MSEN;
 129         tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata);
 130         return tape_do_io_free(device, request);
 131 }
 132
 133 /*
 134  * MTTELL: Tell block. Return the number of block relative to current file.
 135  */
 136 static int
 137 tape_3590_mttell(struct tape_device *device, int mt_count)
 138 {
 139         __u64 block_id;
 140         int rc;
 141
 142         rc = tape_std_read_block_id(device, &block_id);
 143         if (rc)
 144                 return rc;
 145         return block_id >> 32;
 146 }
 147
 148 /*
 149  * MTSEEK: seek to the specified block.
 150  */
 151 static int
 152 tape_3590_mtseek(struct tape_device *device, int count)
 153 {
 154         struct tape_request *request;
 155
 156         DBF_EVENT(6, "xsee id: %x\n", count);
 157         request = tape_alloc_request(3, 4);
 158         if (IS_ERR(request))
 159                 return PTR_ERR(request);
 160         request->op = TO_LBL;
 161         tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
 162         *(__u32 *) request->cpdata = count;
 163         tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
 164         tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
 165         return tape_do_io_free(device, request);
 166 }
 167
 168 /*
 169  * Read Opposite Error Recovery Function:
 170  * Used, when Read Forward does not work
 171  */
 172 static void
 173 tape_3590_read_opposite(struct tape_device *device,
 174                         struct tape_request *request)
 175 {
 176         struct tape_3590_disc_data *data;
 177
 178         /*
 179          * We have allocated 4 ccws in tape_std_read, so we can now
 180          * transform the request to a read backward, followed by a
 181          * forward space block.
 182          */
 183         request->op = TO_RBA;
 184         tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
 185         data = device->discdata;
 186         tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op,
 187                          device->char_data.idal_buf);
 188         tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL);
 189         tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL);
 190         DBF_EVENT(6, "xrop ccwg\n");
 191 }
 192
 193 /*
 194  * Read Attention Msg
 195  * This should be done after an interrupt with attention bit (0x80)
 196  * in device state.
 197  *
 198  * After a "read attention message" request there are two possible
 199  * results:
 200  *
 201  * 1. A unit check is presented, when attention sense is present (e.g. when
 202  * a medium has been unloaded). The attention sense comes then
 203  * together with the unit check. The recovery action is either "retry"
 204  * (in case there is an attention message pending) or "permanent error".
 205  *
 206  * 2. The attention msg is written to the "read subsystem data" buffer.
 207  * In this case we probably should print it to the console.
 208  */
 209 static int
 210 tape_3590_read_attmsg(struct tape_device *device)
 211 {
 212         struct tape_request *request;
 213         char *buf;
 214
 215         request = tape_alloc_request(3, 4096);
 216         if (IS_ERR(request))
 217                 return PTR_ERR(request);
 218         request->op = TO_READ_ATTMSG;
 219         buf = request->cpdata;
 220         buf[0] = PREP_RD_SS_DATA;
 221         buf[6] = RD_ATTMSG;     /* read att msg */
 222         tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf);
 223         tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12);
 224         tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
 225         return tape_do_io_free(device, request);
 226 }
 227
 228 /*
 229  * These functions are used to schedule follow-up actions from within an
 230  * interrupt context (like unsolicited interrupts).
 231  */
 232 struct work_handler_data {
 233         struct tape_device *device;
 234         enum tape_op        op;
 235         struct work_struct  work;
 236 };
 237
 238 static void
 239 tape_3590_work_handler(void *data)
 240 {
 241         struct work_handler_data *p = data;
 242
 243         switch (p->op) {
 244         case TO_MSEN:
 245                 tape_3590_sense_medium(p->device);
 246                 break;
 247         case TO_READ_ATTMSG:
 248                 tape_3590_read_attmsg(p->device);
 249                 break;
 250         default:
 251                 DBF_EVENT(3, "T3590: work handler undefined for "
 252                           "operation 0x%02x\n", p->op);
 253         }
 254         tape_put_device(p->device);
 255         kfree(p);
 256 }
 257
 258 static int
 259 tape_3590_schedule_work(struct tape_device *device, enum tape_op op)
 260 {
 261         struct work_handler_data *p;
 262
 263         if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
 264                 return -ENOMEM;
 265
 266         INIT_WORK(&p->work, tape_3590_work_handler, p);
 267
 268         p->device = tape_get_device_reference(device);
 269         p->op = op;
 270
 271         schedule_work(&p->work);
 272         return 0;
 273 }
 274
 275 #ifdef CONFIG_S390_TAPE_BLOCK
 276 /*
 277  * Tape Block READ
 278  */
 279 static struct tape_request *
 280 tape_3590_bread(struct tape_device *device, struct request *req)
 281 {
 282         struct tape_request *request;
 283         struct ccw1 *ccw;
 284         int count = 0, start_block, i;
 285         unsigned off;
 286         char *dst;
 287         struct bio_vec *bv;
 288         struct bio *bio;
 289
 290         DBF_EVENT(6, "xBREDid:");
 291         start_block = req->sector >> TAPEBLOCK_HSEC_S2B;
 292         DBF_EVENT(6, "start_block = %i\n", start_block);
 293
 294         rq_for_each_bio(bio, req) {
 295                 bio_for_each_segment(bv, bio, i) {
 296                         count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
 297                 }
 298         }
 299         request = tape_alloc_request(2 + count + 1, 4);
 300         if (IS_ERR(request))
 301                 return request;
 302         request->op = TO_BLOCK;
 303         *(__u32 *) request->cpdata = start_block;
 304         ccw = request->cpaddr;
 305         ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte);
 306
 307         /*
 308          * We always setup a nop after the mode set ccw. This slot is
 309          * used in tape_std_check_locate to insert a locate ccw if the
 310          * current tape position doesn't match the start block to be read.
 311          */
 312         ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
 313
 314         rq_for_each_bio(bio, req) {
 315                 bio_for_each_segment(bv, bio, i) {
 316                         dst = page_address(bv->bv_page) + bv->bv_offset;
 317                         for (off = 0; off < bv->bv_len;
 318                              off += TAPEBLOCK_HSEC_SIZE) {
 319                                 ccw->flags = CCW_FLAG_CC;
 320                                 ccw->cmd_code = READ_FORWARD;
 321                                 ccw->count = TAPEBLOCK_HSEC_SIZE;
 322                                 set_normalized_cda(ccw, (void *) __pa(dst));
 323                                 ccw++;
 324                                 dst += TAPEBLOCK_HSEC_SIZE;
 325                         }
 326                         if (off > bv->bv_len)
 327                                 BUG();
 328                 }
 329         }
 330         ccw = tape_ccw_end(ccw, NOP, 0, NULL);
 331         DBF_EVENT(6, "xBREDccwg\n");
 332         return request;
 333 }
 334
 335 static void
 336 tape_3590_free_bread(struct tape_request *request)
 337 {
 338         struct ccw1 *ccw;
 339
 340         /* Last ccw is a nop and doesn't need clear_normalized_cda */
 341         for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++)
 342                 if (ccw->cmd_code == READ_FORWARD)
 343                         clear_normalized_cda(ccw);
 344         tape_free_request(request);
 345 }
 346
 347 /*
 348  * check_locate is called just before the tape request is passed to
 349  * the common io layer for execution. It has to check the current
 350  * tape position and insert a locate ccw if it doesn't match the
 351  * start block for the request.
 352  */
 353 static void
 354 tape_3590_check_locate(struct tape_device *device, struct tape_request *request)
 355 {
 356         __u32 *start_block;
 357
 358         start_block = (__u32 *) request->cpdata;
 359         if (*start_block != device->blk_data.block_position) {
 360                 /* Add the start offset of the file to get the real block. */
 361                 *start_block += device->bof;
 362                 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
 363         }
 364 }
 365 #endif
 366
 367 /*
 368  * The done handler is called at device/channel end and wakes up the sleeping
 369  * process
 370  */
 371 static int
 372 tape_3590_done(struct tape_device *device, struct tape_request *request)
 373 {
 374         struct tape_3590_med_sense *sense;
 375
 376         DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]);
 377
 378         switch (request->op) {
 379         case TO_BSB:
 380         case TO_BSF:
 381         case TO_DSE:
 382         case TO_FSB:
 383         case TO_FSF:
 384         case TO_LBL:
 385         case TO_RFO:
 386         case TO_RBA:
 387         case TO_REW:
 388         case TO_WRI:
 389         case TO_WTM:
 390         case TO_BLOCK:
 391         case TO_LOAD:
 392                 tape_med_state_set(device, MS_LOADED);
 393                 break;
 394         case TO_RUN:
 395                 tape_med_state_set(device, MS_UNLOADED);
 396                 break;
 397         case TO_MSEN:
 398                 sense = (struct tape_3590_med_sense *) request->cpdata;
 399                 if (sense->masst == MSENSE_UNASSOCIATED)
 400                         tape_med_state_set(device, MS_UNLOADED);
 401                 if (sense->masst == MSENSE_ASSOCIATED_MOUNT)
 402                         tape_med_state_set(device, MS_LOADED);
 403                 break;
 404         case TO_RBI:    /* RBI seems to succeed even without medium loaded. */
 405         case TO_NOP:    /* Same to NOP. */
 406         case TO_READ_CONFIG:
 407         case TO_READ_ATTMSG:
 408         case TO_DIS:
 409         case TO_ASSIGN:
 410         case TO_UNASSIGN:
 411                 break;
 412         case TO_SIZE:
 413                 break;
 414         }
 415         return TAPE_IO_SUCCESS;
 416 }
 417
 418 /*
 419  * This fuction is called, when error recovery was successfull
 420  */
 421 static inline int
 422 tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request)
 423 {
 424         DBF_EVENT(3, "Error Recovery successfull for %s\n",
 425                   tape_op_verbose[request->op]);
 426         return tape_3590_done(device, request);
 427 }
 428
 429 /*
 430  * This fuction is called, when error recovery was not successfull
 431  */
 432 static inline int
 433 tape_3590_erp_failed(struct tape_device *device, struct tape_request *request,
 434                      struct irb *irb, int rc)
 435 {
 436         DBF_EVENT(3, "Error Recovery failed for %s\n",
 437                   tape_op_verbose[request->op]);
 438         tape_dump_sense_dbf(device, request, irb);
 439         return rc;
 440 }
 441
 442 /*
 443  * Error Recovery do retry
 444  */
 445 static inline int
 446 tape_3590_erp_retry(struct tape_device *device, struct tape_request *request,
 447                     struct irb *irb)
 448 {
 449         DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]);
 450         tape_dump_sense_dbf(device, request, irb);
 451         return TAPE_IO_RETRY;
 452 }
 453
 454 /*
 455  * Handle unsolicited interrupts
 456  */
 457 static int
 458 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb)
 459 {
 460         if (irb->scsw.dstat == DEV_STAT_CHN_END)
 461                 /* Probably result of halt ssch */
 462                 return TAPE_IO_PENDING;
 463         else if (irb->scsw.dstat == 0x85)
 464                 /* Device Ready -> check medium state */
 465                 tape_3590_schedule_work(device, TO_MSEN);
 466         else if (irb->scsw.dstat & DEV_STAT_ATTENTION)
 467                 tape_3590_schedule_work(device, TO_READ_ATTMSG);
 468         else {
 469                 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id);
 470                 PRINT_WARN("Unsolicited IRQ (Device End) caught.\n");
 471                 tape_dump_sense(device, NULL, irb);
 472         }
 473         return TAPE_IO_SUCCESS;
 474 }
 475
 476 /*
 477  * Basic Recovery routine
 478  */
 479 static int
 480 tape_3590_erp_basic(struct tape_device *device, struct tape_request *request,
 481                     struct irb *irb, int rc)
 482 {
 483         struct tape_3590_sense *sense;
 484
 485         sense = (struct tape_3590_sense *) irb->ecw;
 486
 487         switch (sense->bra) {
 488         case SENSE_BRA_PER:
 489                 return tape_3590_erp_failed(device, request, irb, rc);
 490         case SENSE_BRA_CONT:
 491                 return tape_3590_erp_succeded(device, request);
 492         case SENSE_BRA_RE:
 493                 return tape_3590_erp_retry(device, request, irb);
 494         case SENSE_BRA_DRE:
 495                 return tape_3590_erp_failed(device, request, irb, rc);
 496         default:
 497                 PRINT_ERR("Unknown BRA %x - This should not happen!\n",
 498                           sense->bra);
 499                 BUG();
 500                 return TAPE_IO_STOP;
 501         }
 502 }
 503
 504 /*
 505  *  RDL: Read Device (buffered) log
 506  */
 507 static int
 508 tape_3590_erp_read_buf_log(struct tape_device *device,
 509                            struct tape_request *request, struct irb *irb)
 510 {
 511         /*
 512          * We just do the basic error recovery at the moment (retry).
 513          * Perhaps in the future, we read the log and dump it somewhere...
 514          */
 515         return tape_3590_erp_basic(device, request, irb, -EIO);
 516 }
 517
 518 /*
 519  *  SWAP: Swap Devices
 520  */
 521 static int
 522 tape_3590_erp_swap(struct tape_device *device, struct tape_request *request,
 523                    struct irb *irb)
 524 {
 525         /*
 526          * This error recovery should swap the tapes
 527          * if the original has a problem. The operation
 528          * should proceed with the new tape... this
 529          * should probably be done in user space!
 530          */
 531         PRINT_WARN("(%s): Swap Tape Device!\n", device->cdev->dev.bus_id);
 532         return tape_3590_erp_basic(device, request, irb, -EIO);
 533 }
 534
 535 /*
 536  *  LBY: Long Busy
 537  */
 538 static int
 539 tape_3590_erp_long_busy(struct tape_device *device,
 540                         struct tape_request *request, struct irb *irb)
 541 {
 542         /* FIXME: how about WAITING for a minute ? */
 543         PRINT_WARN("(%s): Device is busy! Please wait a minute!\n",
 544                    device->cdev->dev.bus_id);
 545         return tape_3590_erp_basic(device, request, irb, -EBUSY);
 546 }
 547
 548 /*
 549  *  SPI: Special Intercept
 550  */
 551 static int
 552 tape_3590_erp_special_interrupt(struct tape_device *device,
 553                                 struct tape_request *request, struct irb *irb)
 554 {
 555         return tape_3590_erp_basic(device, request, irb, -EIO);
 556 }
 557
 558 /*
 559  *  RDA: Read Alternate
 560  */
 561 static int
 562 tape_3590_erp_read_alternate(struct tape_device *device,
 563                              struct tape_request *request, struct irb *irb)
 564 {
 565         struct tape_3590_disc_data *data;
 566
 567         /*
 568          * The issued Read Backward or Read Previous command is not
 569          * supported by the device
 570          * The recovery action should be to issue another command:
 571          * Read Revious: if Read Backward is not supported
 572          * Read Backward: if Read Previous is not supported
 573          */
 574         data = device->discdata;
 575         if (data->read_back_op == READ_PREVIOUS) {
 576                 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",
 577                           device->cdev_id);
 578                 data->read_back_op = READ_BACKWARD;
 579         } else {
 580                 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",
 581                           device->cdev_id);
 582                 data->read_back_op = READ_PREVIOUS;
 583         }
 584         tape_3590_read_opposite(device, request);
 585         return tape_3590_erp_retry(device, request, irb);
 586 }
 587
 588 /*
 589  * Error Recovery read opposite
 590  */
 591 static int
 592 tape_3590_erp_read_opposite(struct tape_device *device,
 593                             struct tape_request *request, struct irb *irb)
 594 {
 595         switch (request->op) {
 596         case TO_RFO:
 597                 /*
 598                  * We did read forward, but the data could not be read.
 599                  * We will read backward and then skip forward again.
 600                  */
 601                 tape_3590_read_opposite(device, request);
 602                 return tape_3590_erp_retry(device, request, irb);
 603         case TO_RBA:
 604                 /* We tried to read forward and backward, but hat no success */
 605                 return tape_3590_erp_failed(device, request, irb, -EIO);
 606                 break;
 607         default:
 608                 PRINT_WARN("read_opposite_recovery_called_with_op: %s\n",
 609                            tape_op_verbose[request->op]);
 610                 return tape_3590_erp_failed(device, request, irb, -EIO);
 611         }
 612 }
 613
 614 /*
 615  * Print an MIM (Media Information  Message) (message code f0)
 616  */
 617 static void
 618 tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb)
 619 {
 620         struct tape_3590_sense *sense;
 621
 622         sense = (struct tape_3590_sense *) irb->ecw;
 623         /* Exception Message */
 624         switch (sense->fmt.f70.emc) {
 625         case 0x02:
 626                 PRINT_WARN("(%s): Data degraded\n", device->cdev->dev.bus_id);
 627                 break;
 628         case 0x03:
 629                 PRINT_WARN("(%s): Data degraded in partion %i\n",
 630                            device->cdev->dev.bus_id, sense->fmt.f70.mp);
 631                 break;
 632         case 0x04:
 633                 PRINT_WARN("(%s): Medium degraded\n", device->cdev->dev.bus_id);
 634                 break;
 635         case 0x05:
 636                 PRINT_WARN("(%s): Medium degraded in partition %i\n",
 637                            device->cdev->dev.bus_id, sense->fmt.f70.mp);
 638                 break;
 639         case 0x06:
 640                 PRINT_WARN("(%s): Block 0 Error\n", device->cdev->dev.bus_id);
 641                 break;
 642         case 0x07:
 643                 PRINT_WARN("(%s): Medium Exception 0x%02x\n",
 644                            device->cdev->dev.bus_id, sense->fmt.f70.md);
 645                 break;
 646         default:
 647                 PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n",
 648                            device->cdev->dev.bus_id, sense->fmt.f70.emc);
 649                 break;
 650         }
 651         /* Service Message */
 652         switch (sense->fmt.f70.smc) {
 653         case 0x02:
 654                 PRINT_WARN("(%s): Reference Media maintenance procedure %i\n",
 655                            device->cdev->dev.bus_id, sense->fmt.f70.md);
 656                 break;
 657         default:
 658                 PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n",
 659                            device->cdev->dev.bus_id, sense->fmt.f70.smc);
 660                 break;
 661         }
 662 }
 663
 664 /*
 665  * Print an I/O Subsystem Service Information Message (message code f1)
 666  */
 667 static void
 668 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb)
 669 {
 670         struct tape_3590_sense *sense;
 671
 672         sense = (struct tape_3590_sense *) irb->ecw;
 673         /* Exception Message */
 674         switch (sense->fmt.f71.emc) {
 675         case 0x01:
 676                 PRINT_WARN("(%s): Effect of failure is unknown\n",
 677                            device->cdev->dev.bus_id);
 678                 break;
 679         case 0x02:
 680                 PRINT_WARN("(%s): CU Exception - no performance impact\n",
 681                            device->cdev->dev.bus_id);
 682                 break;
 683         case 0x03:
 684                 PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n",
 685                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 686                 break;
 687         case 0x04:
 688                 PRINT_WARN("(%s): CU Exception on device path 0x%02x\n",
 689                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 690                 break;
 691         case 0x05:
 692                 PRINT_WARN("(%s): CU Exception on library path 0x%02x\n",
 693                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 694                 break;
 695         case 0x06:
 696                 PRINT_WARN("(%s): CU Exception on node 0x%02x\n",
 697                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 698                 break;
 699         case 0x07:
 700                 PRINT_WARN("(%s): CU Exception on partition 0x%02x\n",
 701                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 702                 break;
 703         default:
 704                 PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n",
 705                            device->cdev->dev.bus_id, sense->fmt.f71.emc);
 706         }
 707         /* Service Message */
 708         switch (sense->fmt.f71.smc) {
 709         case 0x01:
 710                 PRINT_WARN("(%s): Repair impact is unknown\n",
 711                            device->cdev->dev.bus_id);
 712                 break;
 713         case 0x02:
 714                 PRINT_WARN("(%s): Repair will not impact cu performance\n",
 715                            device->cdev->dev.bus_id);
 716                 break;
 717         case 0x03:
 718                 if (sense->fmt.f71.mdf == 0)
 719                         PRINT_WARN("(%s): Repair will disable node "
 720                                    "0x%x on CU\n",
 721                                    device->cdev->dev.bus_id,
 722                                    sense->fmt.f71.md[1]);
 723                 else
 724                         PRINT_WARN("(%s): Repair will disable nodes "
 725                                    "(0x%x-0x%x) on CU\n",
 726                                    device->cdev->dev.bus_id,
 727                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 728                 break;
 729         case 0x04:
 730                 if (sense->fmt.f71.mdf == 0)
 731                         PRINT_WARN("(%s): Repair will disable cannel path "
 732                                    "0x%x on CU\n",
 733                                    device->cdev->dev.bus_id,
 734                                    sense->fmt.f71.md[1]);
 735                 else
 736                         PRINT_WARN("(%s): Repair will disable cannel paths "
 737                                    "(0x%x-0x%x) on CU\n",
 738                                    device->cdev->dev.bus_id,
 739                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 740                 break;
 741         case 0x05:
 742                 if (sense->fmt.f71.mdf == 0)
 743                         PRINT_WARN("(%s): Repair will disable device path "
 744                                    "0x%x on CU\n",
 745                                    device->cdev->dev.bus_id,
 746                                    sense->fmt.f71.md[1]);
 747                 else
 748                         PRINT_WARN("(%s): Repair will disable device paths "
 749                                    "(0x%x-0x%x) on CU\n",
 750                                    device->cdev->dev.bus_id,
 751                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 752                 break;
 753         case 0x06:
 754                 if (sense->fmt.f71.mdf == 0)
 755                         PRINT_WARN("(%s): Repair will disable library path "
 756                                    "0x%x on CU\n",
 757                                    device->cdev->dev.bus_id,
 758                                    sense->fmt.f71.md[1]);
 759                 else
 760                         PRINT_WARN("(%s): Repair will disable library paths "
 761                                    "(0x%x-0x%x) on CU\n",
 762                                    device->cdev->dev.bus_id,
 763                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 764                 break;
 765         case 0x07:
 766                 PRINT_WARN("(%s): Repair will disable access to CU\n",
 767                            device->cdev->dev.bus_id);
 768                 break;
 769         default:
 770                 PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n",
 771                            device->cdev->dev.bus_id, sense->fmt.f71.smc);
 772         }
 773 }
 774
 775 /*
 776  * Print an Device Subsystem Service Information Message (message code f2)
 777  */
 778 static void
 779 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb)
 780 {
 781         struct tape_3590_sense *sense;
 782
 783         sense = (struct tape_3590_sense *) irb->ecw;
 784         /* Exception Message */
 785         switch (sense->fmt.f71.emc) {
 786         case 0x01:
 787                 PRINT_WARN("(%s): Effect of failure is unknown\n",
 788                            device->cdev->dev.bus_id);
 789                 break;
 790         case 0x02:
 791                 PRINT_WARN("(%s): DV Exception - no performance impact\n",
 792                            device->cdev->dev.bus_id);
 793                 break;
 794         case 0x03:
 795                 PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n",
 796                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 797                 break;
 798         case 0x04:
 799                 PRINT_WARN("(%s): DV Exception on loader 0x%02x\n",
 800                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 801                 break;
 802         case 0x05:
 803                 PRINT_WARN("(%s): DV Exception on message display 0x%02x\n",
 804                            device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
 805                 break;
 806         case 0x06:
 807                 PRINT_WARN("(%s): DV Exception in tape path\n",
 808                            device->cdev->dev.bus_id);
 809                 break;
 810         case 0x07:
 811                 PRINT_WARN("(%s): DV Exception in drive\n",
 812                            device->cdev->dev.bus_id);
 813                 break;
 814         default:
 815                 PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n",
 816                            device->cdev->dev.bus_id, sense->fmt.f71.emc);
 817         }
 818         /* Service Message */
 819         switch (sense->fmt.f71.smc) {
 820         case 0x01:
 821                 PRINT_WARN("(%s): Repair impact is unknown\n",
 822                            device->cdev->dev.bus_id);
 823                 break;
 824         case 0x02:
 825                 PRINT_WARN("(%s): Repair will not impact device performance\n",
 826                            device->cdev->dev.bus_id);
 827                 break;
 828         case 0x03:
 829                 if (sense->fmt.f71.mdf == 0)
 830                         PRINT_WARN("(%s): Repair will disable channel path "
 831                                    "0x%x on DV\n",
 832                                    device->cdev->dev.bus_id,
 833                                    sense->fmt.f71.md[1]);
 834                 else
 835                         PRINT_WARN("(%s): Repair will disable channel path "
 836                                    "(0x%x-0x%x) on DV\n",
 837                                    device->cdev->dev.bus_id,
 838                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 839                 break;
 840         case 0x04:
 841                 if (sense->fmt.f71.mdf == 0)
 842                         PRINT_WARN("(%s): Repair will disable interface 0x%x "
 843                                    "on DV\n",
 844                                    device->cdev->dev.bus_id,
 845                                    sense->fmt.f71.md[1]);
 846                 else
 847                         PRINT_WARN("(%s): Repair will disable interfaces "
 848                                    "(0x%x-0x%x) on DV\n",
 849                                    device->cdev->dev.bus_id,
 850                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 851                 break;
 852         case 0x05:
 853                 if (sense->fmt.f71.mdf == 0)
 854                         PRINT_WARN("(%s): Repair will disable loader 0x%x "
 855                                    "on DV\n",
 856                                    device->cdev->dev.bus_id,
 857                                    sense->fmt.f71.md[1]);
 858                 else
 859                         PRINT_WARN("(%s): Repair will disable loader "
 860                                    "(0x%x-0x%x) on DV\n",
 861                                    device->cdev->dev.bus_id,
 862                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 863                 break;
 864         case 0x07:
 865                 PRINT_WARN("(%s): Repair will disable access to DV\n",
 866                            device->cdev->dev.bus_id);
 867                 break;
 868         case 0x08:
 869                 if (sense->fmt.f71.mdf == 0)
 870                         PRINT_WARN("(%s): Repair will disable message "
 871                                    "display 0x%x on DV\n",
 872                                    device->cdev->dev.bus_id,
 873                                    sense->fmt.f71.md[1]);
 874                 else
 875                         PRINT_WARN("(%s): Repair will disable message "
 876                                    "displays (0x%x-0x%x) on DV\n",
 877                                    device->cdev->dev.bus_id,
 878                                    sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
 879                 break;
 880         case 0x09:
 881                 PRINT_WARN("(%s): Clean DV\n", device->cdev->dev.bus_id);
 882                 break;
 883         default:
 884                 PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n",
 885                            device->cdev->dev.bus_id, sense->fmt.f71.smc);
 886         }
 887 }
 888
 889 /*
 890  * Print standard ERA Message
 891  */
 892 static void
 893 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb)
 894 {
 895         struct tape_3590_sense *sense;
 896
 897         sense = (struct tape_3590_sense *) irb->ecw;
 898         if (sense->mc == 0)
 899                 return;
 900         if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) {
 901                 if (tape_3590_msg[sense->mc] != NULL)
 902                         PRINT_WARN("(%s): %s\n", device->cdev->dev.bus_id,
 903                                    tape_3590_msg[sense->mc]);
 904                 else {
 905                         PRINT_WARN("(%s): Message Code 0x%x\n",
 906                                    device->cdev->dev.bus_id, sense->mc);
 907                 }
 908                 return;
 909         }
 910         if (sense->mc == 0xf0) {
 911                 /* Standard Media Information Message */
 912                 PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, "
 913                            "RC=%02x-%04x-%02x\n", device->cdev->dev.bus_id,
 914                            sense->fmt.f70.sev, sense->mc,
 915                            sense->fmt.f70.emc, sense->fmt.f70.smc,
 916                            sense->fmt.f70.refcode, sense->fmt.f70.mid,
 917                            sense->fmt.f70.fid);
 918                 tape_3590_print_mim_msg_f0(device, irb);
 919                 return;
 920         }
 921         if (sense->mc == 0xf1) {
 922                 /* Standard I/O Subsystem Service Information Message */
 923                 PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, "
 924                            "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
 925                            device->cdev->dev.bus_id, sense->fmt.f71.sev,
 926                            device->cdev->id.dev_model,
 927                            sense->mc, sense->fmt.f71.emc,
 928                            sense->fmt.f71.smc, sense->fmt.f71.refcode1,
 929                            sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
 930                 tape_3590_print_io_sim_msg_f1(device, irb);
 931                 return;
 932         }
 933         if (sense->mc == 0xf2) {
 934                 /* Standard Device Service Information Message */
 935                 PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, "
 936                            "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
 937                            device->cdev->dev.bus_id, sense->fmt.f71.sev,
 938                            device->cdev->id.dev_model,
 939                            sense->mc, sense->fmt.f71.emc,
 940                            sense->fmt.f71.smc, sense->fmt.f71.refcode1,
 941                            sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
 942                 tape_3590_print_dev_sim_msg_f2(device, irb);
 943                 return;
 944         }
 945         if (sense->mc == 0xf3) {
 946                 /* Standard Library Service Information Message */
 947                 return;
 948         }
 949         PRINT_WARN("(%s): Device Message(%x)\n",
 950                    device->cdev->dev.bus_id, sense->mc);
 951 }
 952
 953 /*
 954  *  3590 error Recovery routine:
 955  *  If possible, it tries to recover from the error. If this is not possible,
 956  *  inform the user about the problem.
 957  */
 958 static int
 959 tape_3590_unit_check(struct tape_device *device, struct tape_request *request,
 960                      struct irb *irb)
 961 {
 962         struct tape_3590_sense *sense;
 963         int rc;
 964
 965 #ifdef CONFIG_S390_TAPE_BLOCK
 966         if (request->op == TO_BLOCK) {
 967                 /*
 968                  * Recovery for block device requests. Set the block_position
 969                  * to something invalid and retry.
 970                  */
 971                 device->blk_data.block_position = -1;
 972                 if (request->retries-- <= 0)
 973                         return tape_3590_erp_failed(device, request, irb, -EIO);
 974                 else
 975                         return tape_3590_erp_retry(device, request, irb);
 976         }
 977 #endif
 978
 979         sense = (struct tape_3590_sense *) irb->ecw;
 980
 981         /*
 982          * First check all RC-QRCs where we want to do something special
 983          *   - "break":     basic error recovery is done
 984          *   - "goto out:": just print error message if available
 985          */
 986         rc = -EIO;
 987         switch (sense->rc_rqc) {
 988
 989         case 0x1110:
 990                 tape_3590_print_era_msg(device, irb);
 991                 return tape_3590_erp_read_buf_log(device, request, irb);
 992
 993         case 0x2011:
 994                 tape_3590_print_era_msg(device, irb);
 995                 return tape_3590_erp_read_alternate(device, request, irb);
 996
 997         case 0x2230:
 998         case 0x2231:
 999                 tape_3590_print_era_msg(device, irb);
1000                 return tape_3590_erp_special_interrupt(device, request, irb);
1001
1002         case 0x3010:
1003                 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n",
1004                           device->cdev_id);
1005                 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1006         case 0x3012:
1007                 DBF_EVENT(2, "(%08x): Forward at End of Partition\n",
1008                           device->cdev_id);
1009                 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1010         case 0x3020:
1011                 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id);
1012                 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1013
1014         case 0x3122:
1015                 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n",
1016                           device->cdev_id);
1017                 return tape_3590_erp_basic(device, request, irb, -EIO);
1018         case 0x3123:
1019                 DBF_EVENT(2, "(%08x): Rewind Unload complete\n",
1020                           device->cdev_id);
1021                 tape_med_state_set(device, MS_UNLOADED);
1022                 return tape_3590_erp_basic(device, request, irb, 0);
1023
1024         case 0x4010:
1025                 /*
1026                  * print additional msg since default msg
1027                  * "device intervention" is not very meaningfull
1028                  */
1029                 PRINT_WARN("(%s): Tape operation when medium not loaded\n",
1030                            device->cdev->dev.bus_id);
1031                 tape_med_state_set(device, MS_UNLOADED);
1032                 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1033         case 0x4012:            /* Device Long Busy */
1034                 tape_3590_print_era_msg(device, irb);
1035                 return tape_3590_erp_long_busy(device, request, irb);
1036
1037         case 0x5010:
1038                 if (sense->rac == 0xd0) {
1039                         /* Swap */
1040                         tape_3590_print_era_msg(device, irb);
1041                         return tape_3590_erp_swap(device, request, irb);
1042                 }
1043                 if (sense->rac == 0x26) {
1044                         /* Read Opposite */
1045                         tape_3590_print_era_msg(device, irb);
1046                         return tape_3590_erp_read_opposite(device, request,
1047                                                            irb);
1048                 }
1049                 return tape_3590_erp_basic(device, request, irb, -EIO);
1050         case 0x5020:
1051         case 0x5021:
1052         case 0x5022:
1053         case 0x5040:
1054         case 0x5041:
1055         case 0x5042:
1056                 tape_3590_print_era_msg(device, irb);
1057                 return tape_3590_erp_swap(device, request, irb);
1058
1059         case 0x5110:
1060         case 0x5111:
1061                 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1062
1063         case 0x5120:
1064         case 0x1120:
1065                 tape_med_state_set(device, MS_UNLOADED);
1066                 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1067
1068         case 0x6020:
1069                 PRINT_WARN("(%s): Cartridge of wrong type ?\n",
1070                            device->cdev->dev.bus_id);
1071                 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1072
1073         case 0x8011:
1074                 PRINT_WARN("(%s): Another host has reserved the tape device\n",
1075                            device->cdev->dev.bus_id);
1076                 return tape_3590_erp_basic(device, request, irb, -EPERM);
1077         case 0x8013:
1078                 PRINT_WARN("(%s): Another host has priviliged access to the "
1079                            "tape device\n", device->cdev->dev.bus_id);
1080                 PRINT_WARN("(%s): To solve the problem unload the current "
1081                            "cartridge!\n", device->cdev->dev.bus_id);
1082                 return tape_3590_erp_basic(device, request, irb, -EPERM);
1083         default:
1084                 return tape_3590_erp_basic(device, request, irb, -EIO);
1085         }
1086 }
1087
1088 /*
1089  * 3590 interrupt handler:
1090  */
1091 static int
1092 tape_3590_irq(struct tape_device *device, struct tape_request *request,
1093               struct irb *irb)
1094 {
1095         if (request == NULL)
1096                 return tape_3590_unsolicited_irq(device, irb);
1097
1098         if ((irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) &&
1099             (irb->scsw.dstat & DEV_STAT_DEV_END) && (request->op == TO_WRI)) {
1100                 /* Write at end of volume */
1101                 DBF_EVENT(2, "End of volume\n");
1102                 return tape_3590_erp_failed(device, request, irb, -ENOSPC);
1103         }
1104
1105         if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)
1106                 return tape_3590_unit_check(device, request, irb);
1107
1108         if (irb->scsw.dstat & DEV_STAT_DEV_END) {
1109                 if (irb->scsw.dstat == DEV_STAT_UNIT_EXCEP) {
1110                         if (request->op == TO_FSB || request->op == TO_BSB)
1111                                 request->rescnt++;
1112                         else
1113                                 DBF_EVENT(5, "Unit Exception!\n");
1114                 }
1115
1116                 return tape_3590_done(device, request);
1117         }
1118
1119         if (irb->scsw.dstat & DEV_STAT_CHN_END) {
1120                 DBF_EVENT(2, "cannel end\n");
1121                 return TAPE_IO_PENDING;
1122         }
1123
1124         if (irb->scsw.dstat & DEV_STAT_ATTENTION) {
1125                 DBF_EVENT(2, "Unit Attention when busy..\n");
1126                 return TAPE_IO_PENDING;
1127         }
1128
1129         DBF_EVENT(6, "xunknownirq\n");
1130         PRINT_ERR("Unexpected interrupt.\n");
1131         PRINT_ERR("Current op is: %s", tape_op_verbose[request->op]);
1132         tape_dump_sense(device, request, irb);
1133         return TAPE_IO_STOP;
1134 }
1135
1136 /*
1137  * Setup device function
1138  */
1139 static int
1140 tape_3590_setup_device(struct tape_device *device)
1141 {
1142         int rc;
1143         struct tape_3590_disc_data *data;
1144
1145         DBF_EVENT(6, "3590 device setup\n");
1146         data = kmalloc(sizeof(struct tape_3590_disc_data),
1147                        GFP_KERNEL | GFP_DMA);
1148         if (data == NULL)
1149                 return -ENOMEM;
1150         data->read_back_op = READ_PREVIOUS;
1151         device->discdata = data;
1152
1153         if ((rc = tape_std_assign(device)) == 0) {
1154                 /* Try to find out if medium is loaded */
1155                 if ((rc = tape_3590_sense_medium(device)) != 0)
1156                         DBF_LH(3, "3590 medium sense returned %d\n", rc);
1157         }
1158
1159         return rc;
1160 }
1161
1162 /*
1163  * Cleanup device function
1164  */
1165 static void
1166 tape_3590_cleanup_device(struct tape_device *device)
1167 {
1168         flush_scheduled_work();
1169         tape_std_unassign(device);
1170
1171         kfree(device->discdata);
1172         device->discdata = NULL;
1173 }
1174
1175 /*
1176  * List of 3590 magnetic tape commands.
1177  */
1178 static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = {
1179         [MTRESET]        = tape_std_mtreset,
1180         [MTFSF]          = tape_std_mtfsf,
1181         [MTBSF]          = tape_std_mtbsf,
1182         [MTFSR]          = tape_std_mtfsr,
1183         [MTBSR]          = tape_std_mtbsr,
1184         [MTWEOF]         = tape_std_mtweof,
1185         [MTREW]          = tape_std_mtrew,
1186         [MTOFFL]         = tape_std_mtoffl,
1187         [MTNOP]          = tape_std_mtnop,
1188         [MTRETEN]        = tape_std_mtreten,
1189         [MTBSFM]         = tape_std_mtbsfm,
1190         [MTFSFM]         = tape_std_mtfsfm,
1191         [MTEOM]          = tape_std_mteom,
1192         [MTERASE]        = tape_std_mterase,
1193         [MTRAS1]         = NULL,
1194         [MTRAS2]         = NULL,
1195         [MTRAS3]         = NULL,
1196         [MTSETBLK]       = tape_std_mtsetblk,
1197         [MTSETDENSITY]   = NULL,
1198         [MTSEEK]         = tape_3590_mtseek,
1199         [MTTELL]         = tape_3590_mttell,
1200         [MTSETDRVBUFFER] = NULL,
1201         [MTFSS]          = NULL,
1202         [MTBSS]          = NULL,
1203         [MTWSM]          = NULL,
1204         [MTLOCK]         = NULL,
1205         [MTUNLOCK]       = NULL,
1206         [MTLOAD]         = tape_std_mtload,
1207         [MTUNLOAD]       = tape_std_mtunload,
1208         [MTCOMPRESSION]  = tape_std_mtcompression,
1209         [MTSETPART]      = NULL,
1210         [MTMKPART]       = NULL
1211 };
1212
1213 /*
1214  * Tape discipline structure for 3590.
1215  */
1216 static struct tape_discipline tape_discipline_3590 = {
1217         .owner = THIS_MODULE,
1218         .setup_device = tape_3590_setup_device,
1219         .cleanup_device = tape_3590_cleanup_device,
1220         .process_eov = tape_std_process_eov,
1221         .irq = tape_3590_irq,
1222         .read_block = tape_std_read_block,
1223         .write_block = tape_std_write_block,
1224 #ifdef CONFIG_S390_TAPE_BLOCK
1225         .bread = tape_3590_bread,
1226         .free_bread = tape_3590_free_bread,
1227         .check_locate = tape_3590_check_locate,
1228 #endif
1229         .ioctl_fn = tape_3590_ioctl,
1230         .mtop_array = tape_3590_mtop
1231 };
1232
1233 static struct ccw_device_id tape_3590_ids[] = {
1234         {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590},
1235         {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592},
1236         { /* end of list */ }
1237 };
1238
1239 static int
1240 tape_3590_online(struct ccw_device *cdev)
1241 {
1242         return tape_generic_online(cdev->dev.driver_data,
1243                                    &tape_discipline_3590);
1244 }
1245
1246 static int
1247 tape_3590_offline(struct ccw_device *cdev)
1248 {
1249         return tape_generic_offline(cdev->dev.driver_data);
1250 }
1251
1252 static struct ccw_driver tape_3590_driver = {
1253         .name = "tape_3590",
1254         .owner = THIS_MODULE,
1255         .ids = tape_3590_ids,
1256         .probe = tape_generic_probe,
1257         .remove = tape_generic_remove,
1258         .set_offline = tape_3590_offline,
1259         .set_online = tape_3590_online,
1260 };
1261
1262 /*
1263  * Setup discipline structure.
1264  */
1265 static int
1266 tape_3590_init(void)
1267 {
1268         int rc;
1269
1270         TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long));
1271         debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view);
1272 #ifdef DBF_LIKE_HELL
1273         debug_set_level(TAPE_DBF_AREA, 6);
1274 #endif
1275
1276         DBF_EVENT(3, "3590 init\n");
1277         /* Register driver for 3590 tapes. */
1278         rc = ccw_driver_register(&tape_3590_driver);
1279         if (rc)
1280                 DBF_EVENT(3, "3590 init failed\n");
1281         else
1282                 DBF_EVENT(3, "3590 registered\n");
1283         return rc;
1284 }
1285
1286 static void
1287 tape_3590_exit(void)
1288 {
1289         ccw_driver_unregister(&tape_3590_driver);
1290
1291         debug_unregister(TAPE_DBF_AREA);
1292 }
1293
1294 MODULE_DEVICE_TABLE(ccw, tape_3590_ids);
1295 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation");
1296 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver");
1297 MODULE_LICENSE("GPL");
1298
1299 module_init(tape_3590_init);
1300 module_exit(tape_3590_exit);