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