git.oblomov.eu Git - linux-2.6/blob - drivers/s390/cio/device_ops.c

   1 /*
   2  *  drivers/s390/cio/device_ops.c
   3  *
   4  *    Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
   5  *                       IBM Corporation
   6  *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
   7  *               Cornelia Huck (cornelia.huck@de.ibm.com)
   8  */
   9 #include <linux/module.h>
  10 #include <linux/init.h>
  11 #include <linux/errno.h>
  12 #include <linux/slab.h>
  13 #include <linux/list.h>
  14 #include <linux/device.h>
  15 #include <linux/delay.h>
  16
  17 #include <asm/ccwdev.h>
  18 #include <asm/idals.h>
  19
  20 #include "cio.h"
  21 #include "cio_debug.h"
  22 #include "css.h"
  23 #include "chsc.h"
  24 #include "device.h"
  25
  26 int ccw_device_set_options_mask(struct ccw_device *cdev, unsigned long flags)
  27 {
  28        /*
  29         * The flag usage is mutal exclusive ...
  30         */
  31         if ((flags & CCWDEV_EARLY_NOTIFICATION) &&
  32             (flags & CCWDEV_REPORT_ALL))
  33                 return -EINVAL;
  34         cdev->private->options.fast = (flags & CCWDEV_EARLY_NOTIFICATION) != 0;
  35         cdev->private->options.repall = (flags & CCWDEV_REPORT_ALL) != 0;
  36         cdev->private->options.pgroup = (flags & CCWDEV_DO_PATHGROUP) != 0;
  37         cdev->private->options.force = (flags & CCWDEV_ALLOW_FORCE) != 0;
  38         return 0;
  39 }
  40
  41 int ccw_device_set_options(struct ccw_device *cdev, unsigned long flags)
  42 {
  43        /*
  44         * The flag usage is mutal exclusive ...
  45         */
  46         if (((flags & CCWDEV_EARLY_NOTIFICATION) &&
  47             (flags & CCWDEV_REPORT_ALL)) ||
  48             ((flags & CCWDEV_EARLY_NOTIFICATION) &&
  49              cdev->private->options.repall) ||
  50             ((flags & CCWDEV_REPORT_ALL) &&
  51              cdev->private->options.fast))
  52                 return -EINVAL;
  53         cdev->private->options.fast |= (flags & CCWDEV_EARLY_NOTIFICATION) != 0;
  54         cdev->private->options.repall |= (flags & CCWDEV_REPORT_ALL) != 0;
  55         cdev->private->options.pgroup |= (flags & CCWDEV_DO_PATHGROUP) != 0;
  56         cdev->private->options.force |= (flags & CCWDEV_ALLOW_FORCE) != 0;
  57         return 0;
  58 }
  59
  60 void ccw_device_clear_options(struct ccw_device *cdev, unsigned long flags)
  61 {
  62         cdev->private->options.fast &= (flags & CCWDEV_EARLY_NOTIFICATION) == 0;
  63         cdev->private->options.repall &= (flags & CCWDEV_REPORT_ALL) == 0;
  64         cdev->private->options.pgroup &= (flags & CCWDEV_DO_PATHGROUP) == 0;
  65         cdev->private->options.force &= (flags & CCWDEV_ALLOW_FORCE) == 0;
  66 }
  67
  68 int
  69 ccw_device_clear(struct ccw_device *cdev, unsigned long intparm)
  70 {
  71         struct subchannel *sch;
  72         int ret;
  73
  74         if (!cdev)
  75                 return -ENODEV;
  76         if (cdev->private->state == DEV_STATE_NOT_OPER)
  77                 return -ENODEV;
  78         if (cdev->private->state != DEV_STATE_ONLINE &&
  79             cdev->private->state != DEV_STATE_W4SENSE)
  80                 return -EINVAL;
  81         sch = to_subchannel(cdev->dev.parent);
  82         if (!sch)
  83                 return -ENODEV;
  84         ret = cio_clear(sch);
  85         if (ret == 0)
  86                 cdev->private->intparm = intparm;
  87         return ret;
  88 }
  89
  90 int
  91 ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
  92                      unsigned long intparm, __u8 lpm, __u8 key,
  93                      unsigned long flags)
  94 {
  95         struct subchannel *sch;
  96         int ret;
  97
  98         if (!cdev)
  99                 return -ENODEV;
 100         sch = to_subchannel(cdev->dev.parent);
 101         if (!sch)
 102                 return -ENODEV;
 103         if (cdev->private->state == DEV_STATE_NOT_OPER)
 104                 return -ENODEV;
 105         if (cdev->private->state == DEV_STATE_VERIFY ||
 106             cdev->private->state == DEV_STATE_CLEAR_VERIFY) {
 107                 /* Remember to fake irb when finished. */
 108                 if (!cdev->private->flags.fake_irb) {
 109                         cdev->private->flags.fake_irb = 1;
 110                         cdev->private->intparm = intparm;
 111                         return 0;
 112                 } else
 113                         /* There's already a fake I/O around. */
 114                         return -EBUSY;
 115         }
 116         if (cdev->private->state != DEV_STATE_ONLINE ||
 117             ((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) &&
 118              !(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) ||
 119             cdev->private->flags.doverify)
 120                 return -EBUSY;
 121         ret = cio_set_options (sch, flags);
 122         if (ret)
 123                 return ret;
 124         /* Adjust requested path mask to excluded varied off paths. */
 125         if (lpm) {
 126                 lpm &= sch->opm;
 127                 if (lpm == 0)
 128                         return -EACCES;
 129         }
 130         ret = cio_start_key (sch, cpa, lpm, key);
 131         if (ret == 0)
 132                 cdev->private->intparm = intparm;
 133         return ret;
 134 }
 135
 136
 137 int
 138 ccw_device_start_timeout_key(struct ccw_device *cdev, struct ccw1 *cpa,
 139                              unsigned long intparm, __u8 lpm, __u8 key,
 140                              unsigned long flags, int expires)
 141 {
 142         int ret;
 143
 144         if (!cdev)
 145                 return -ENODEV;
 146         ccw_device_set_timeout(cdev, expires);
 147         ret = ccw_device_start_key(cdev, cpa, intparm, lpm, key, flags);
 148         if (ret != 0)
 149                 ccw_device_set_timeout(cdev, 0);
 150         return ret;
 151 }
 152
 153 int
 154 ccw_device_start(struct ccw_device *cdev, struct ccw1 *cpa,
 155                  unsigned long intparm, __u8 lpm, unsigned long flags)
 156 {
 157         return ccw_device_start_key(cdev, cpa, intparm, lpm,
 158                                     PAGE_DEFAULT_KEY, flags);
 159 }
 160
 161 int
 162 ccw_device_start_timeout(struct ccw_device *cdev, struct ccw1 *cpa,
 163                          unsigned long intparm, __u8 lpm, unsigned long flags,
 164                          int expires)
 165 {
 166         return ccw_device_start_timeout_key(cdev, cpa, intparm, lpm,
 167                                             PAGE_DEFAULT_KEY, flags,
 168                                             expires);
 169 }
 170
 171
 172 int
 173 ccw_device_halt(struct ccw_device *cdev, unsigned long intparm)
 174 {
 175         struct subchannel *sch;
 176         int ret;
 177
 178         if (!cdev)
 179                 return -ENODEV;
 180         if (cdev->private->state == DEV_STATE_NOT_OPER)
 181                 return -ENODEV;
 182         if (cdev->private->state != DEV_STATE_ONLINE &&
 183             cdev->private->state != DEV_STATE_W4SENSE)
 184                 return -EINVAL;
 185         sch = to_subchannel(cdev->dev.parent);
 186         if (!sch)
 187                 return -ENODEV;
 188         ret = cio_halt(sch);
 189         if (ret == 0)
 190                 cdev->private->intparm = intparm;
 191         return ret;
 192 }
 193
 194 int
 195 ccw_device_resume(struct ccw_device *cdev)
 196 {
 197         struct subchannel *sch;
 198
 199         if (!cdev)
 200                 return -ENODEV;
 201         sch = to_subchannel(cdev->dev.parent);
 202         if (!sch)
 203                 return -ENODEV;
 204         if (cdev->private->state == DEV_STATE_NOT_OPER)
 205                 return -ENODEV;
 206         if (cdev->private->state != DEV_STATE_ONLINE ||
 207             !(sch->schib.scsw.actl & SCSW_ACTL_SUSPENDED))
 208                 return -EINVAL;
 209         return cio_resume(sch);
 210 }
 211
 212 /*
 213  * Pass interrupt to device driver.
 214  */
 215 int
 216 ccw_device_call_handler(struct ccw_device *cdev)
 217 {
 218         struct subchannel *sch;
 219         unsigned int stctl;
 220         int ending_status;
 221
 222         sch = to_subchannel(cdev->dev.parent);
 223
 224         /*
 225          * we allow for the device action handler if .
 226          *  - we received ending status
 227          *  - the action handler requested to see all interrupts
 228          *  - we received an intermediate status
 229          *  - fast notification was requested (primary status)
 230          *  - unsolicited interrupts
 231          */
 232         stctl = cdev->private->irb.scsw.stctl;
 233         ending_status = (stctl & SCSW_STCTL_SEC_STATUS) ||
 234                 (stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)) ||
 235                 (stctl == SCSW_STCTL_STATUS_PEND);
 236         if (!ending_status &&
 237             !cdev->private->options.repall &&
 238             !(stctl & SCSW_STCTL_INTER_STATUS) &&
 239             !(cdev->private->options.fast &&
 240               (stctl & SCSW_STCTL_PRIM_STATUS)))
 241                 return 0;
 242
 243         /* Clear pending timers for device driver initiated I/O. */
 244         if (ending_status)
 245                 ccw_device_set_timeout(cdev, 0);
 246         /*
 247          * Now we are ready to call the device driver interrupt handler.
 248          */
 249         if (cdev->handler)
 250                 cdev->handler(cdev, cdev->private->intparm,
 251                               &cdev->private->irb);
 252
 253         /*
 254          * Clear the old and now useless interrupt response block.
 255          */
 256         memset(&cdev->private->irb, 0, sizeof(struct irb));
 257
 258         return 1;
 259 }
 260
 261 /*
 262  * Search for CIW command in extended sense data.
 263  */
 264 struct ciw *
 265 ccw_device_get_ciw(struct ccw_device *cdev, __u32 ct)
 266 {
 267         int ciw_cnt;
 268
 269         if (cdev->private->flags.esid == 0)
 270                 return NULL;
 271         for (ciw_cnt = 0; ciw_cnt < MAX_CIWS; ciw_cnt++)
 272                 if (cdev->private->senseid.ciw[ciw_cnt].ct == ct)
 273                         return cdev->private->senseid.ciw + ciw_cnt;
 274         return NULL;
 275 }
 276
 277 __u8
 278 ccw_device_get_path_mask(struct ccw_device *cdev)
 279 {
 280         struct subchannel *sch;
 281
 282         sch = to_subchannel(cdev->dev.parent);
 283         if (!sch)
 284                 return 0;
 285         else
 286                 return sch->lpm;
 287 }
 288
 289 static void
 290 ccw_device_wake_up(struct ccw_device *cdev, unsigned long ip, struct irb *irb)
 291 {
 292         if (!ip)
 293                 /* unsolicited interrupt */
 294                 return;
 295
 296         /* Abuse intparm for error reporting. */
 297         if (IS_ERR(irb))
 298                 cdev->private->intparm = -EIO;
 299         else if (irb->scsw.cc == 1)
 300                 /* Retry for deferred condition code. */
 301                 cdev->private->intparm = -EAGAIN;
 302         else if ((irb->scsw.dstat !=
 303                   (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) ||
 304                  (irb->scsw.cstat != 0)) {
 305                 /*
 306                  * We didn't get channel end / device end. Check if path
 307                  * verification has been started; we can retry after it has
 308                  * finished. We also retry unit checks except for command reject
 309                  * or intervention required. Also check for long busy
 310                  * conditions.
 311                  */
 312                  if (cdev->private->flags.doverify ||
 313                          cdev->private->state == DEV_STATE_VERIFY)
 314                          cdev->private->intparm = -EAGAIN;
 315                 else if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) &&
 316                          !(irb->ecw[0] &
 317                            (SNS0_CMD_REJECT | SNS0_INTERVENTION_REQ)))
 318                         cdev->private->intparm = -EAGAIN;
 319                 else if ((irb->scsw.dstat & DEV_STAT_ATTENTION) &&
 320                          (irb->scsw.dstat & DEV_STAT_DEV_END) &&
 321                          (irb->scsw.dstat & DEV_STAT_UNIT_EXCEP))
 322                         cdev->private->intparm = -EAGAIN;
 323                  else
 324                          cdev->private->intparm = -EIO;
 325
 326         } else
 327                 cdev->private->intparm = 0;
 328         wake_up(&cdev->private->wait_q);
 329 }
 330
 331 static int
 332 __ccw_device_retry_loop(struct ccw_device *cdev, struct ccw1 *ccw, long magic, __u8 lpm)
 333 {
 334         int ret;
 335         struct subchannel *sch;
 336
 337         sch = to_subchannel(cdev->dev.parent);
 338         do {
 339                 ccw_device_set_timeout(cdev, 60 * HZ);
 340                 ret = cio_start (sch, ccw, lpm);
 341                 if (ret != 0)
 342                         ccw_device_set_timeout(cdev, 0);
 343                 if (ret == -EBUSY) {
 344                         /* Try again later. */
 345                         spin_unlock_irq(sch->lock);
 346                         msleep(10);
 347                         spin_lock_irq(sch->lock);
 348                         continue;
 349                 }
 350                 if (ret != 0)
 351                         /* Non-retryable error. */
 352                         break;
 353                 /* Wait for end of request. */
 354                 cdev->private->intparm = magic;
 355                 spin_unlock_irq(sch->lock);
 356                 wait_event(cdev->private->wait_q,
 357                            (cdev->private->intparm == -EIO) ||
 358                            (cdev->private->intparm == -EAGAIN) ||
 359                            (cdev->private->intparm == 0));
 360                 spin_lock_irq(sch->lock);
 361                 /* Check at least for channel end / device end */
 362                 if (cdev->private->intparm == -EIO) {
 363                         /* Non-retryable error. */
 364                         ret = -EIO;
 365                         break;
 366                 }
 367                 if (cdev->private->intparm == 0)
 368                         /* Success. */
 369                         break;
 370                 /* Try again later. */
 371                 spin_unlock_irq(sch->lock);
 372                 msleep(10);
 373                 spin_lock_irq(sch->lock);
 374         } while (1);
 375
 376         return ret;
 377 }
 378
 379 /**
 380  * read_dev_chars() - read device characteristics
 381  * @param cdev   target ccw device
 382  * @param buffer pointer to buffer for rdc data
 383  * @param length size of rdc data
 384  * @returns 0 for success, negative error value on failure
 385  *
 386  * Context:
 387  *   called for online device, lock not held
 388  **/
 389 int
 390 read_dev_chars (struct ccw_device *cdev, void **buffer, int length)
 391 {
 392         void (*handler)(struct ccw_device *, unsigned long, struct irb *);
 393         struct subchannel *sch;
 394         int ret;
 395         struct ccw1 *rdc_ccw;
 396
 397         if (!cdev)
 398                 return -ENODEV;
 399         if (!buffer || !length)
 400                 return -EINVAL;
 401         sch = to_subchannel(cdev->dev.parent);
 402
 403         CIO_TRACE_EVENT (4, "rddevch");
 404         CIO_TRACE_EVENT (4, sch->dev.bus_id);
 405
 406         rdc_ccw = kzalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
 407         if (!rdc_ccw)
 408                 return -ENOMEM;
 409         rdc_ccw->cmd_code = CCW_CMD_RDC;
 410         rdc_ccw->count = length;
 411         rdc_ccw->flags = CCW_FLAG_SLI;
 412         ret = set_normalized_cda (rdc_ccw, (*buffer));
 413         if (ret != 0) {
 414                 kfree(rdc_ccw);
 415                 return ret;
 416         }
 417
 418         spin_lock_irq(sch->lock);
 419         /* Save interrupt handler. */
 420         handler = cdev->handler;
 421         /* Temporarily install own handler. */
 422         cdev->handler = ccw_device_wake_up;
 423         if (cdev->private->state != DEV_STATE_ONLINE)
 424                 ret = -ENODEV;
 425         else if (((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) &&
 426                   !(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) ||
 427                  cdev->private->flags.doverify)
 428                 ret = -EBUSY;
 429         else
 430                 /* 0x00D9C4C3 == ebcdic "RDC" */
 431                 ret = __ccw_device_retry_loop(cdev, rdc_ccw, 0x00D9C4C3, 0);
 432
 433         /* Restore interrupt handler. */
 434         cdev->handler = handler;
 435         spin_unlock_irq(sch->lock);
 436
 437         clear_normalized_cda (rdc_ccw);
 438         kfree(rdc_ccw);
 439
 440         return ret;
 441 }
 442
 443 /*
 444  *  Read Configuration data using path mask
 445  */
 446 int
 447 read_conf_data_lpm (struct ccw_device *cdev, void **buffer, int *length, __u8 lpm)
 448 {
 449         void (*handler)(struct ccw_device *, unsigned long, struct irb *);
 450         struct subchannel *sch;
 451         struct ciw *ciw;
 452         char *rcd_buf;
 453         int ret;
 454         struct ccw1 *rcd_ccw;
 455
 456         if (!cdev)
 457                 return -ENODEV;
 458         if (!buffer || !length)
 459                 return -EINVAL;
 460         sch = to_subchannel(cdev->dev.parent);
 461
 462         CIO_TRACE_EVENT (4, "rdconf");
 463         CIO_TRACE_EVENT (4, sch->dev.bus_id);
 464
 465         /*
 466          * scan for RCD command in extended SenseID data
 467          */
 468         ciw = ccw_device_get_ciw(cdev, CIW_TYPE_RCD);
 469         if (!ciw || ciw->cmd == 0)
 470                 return -EOPNOTSUPP;
 471
 472         /* Adjust requested path mask to excluded varied off paths. */
 473         if (lpm) {
 474                 lpm &= sch->opm;
 475                 if (lpm == 0)
 476                         return -EACCES;
 477         }
 478
 479         rcd_ccw = kzalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
 480         if (!rcd_ccw)
 481                 return -ENOMEM;
 482         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
 483         if (!rcd_buf) {
 484                 kfree(rcd_ccw);
 485                 return -ENOMEM;
 486         }
 487         rcd_ccw->cmd_code = ciw->cmd;
 488         rcd_ccw->cda = (__u32) __pa (rcd_buf);
 489         rcd_ccw->count = ciw->count;
 490         rcd_ccw->flags = CCW_FLAG_SLI;
 491
 492         spin_lock_irq(sch->lock);
 493         /* Save interrupt handler. */
 494         handler = cdev->handler;
 495         /* Temporarily install own handler. */
 496         cdev->handler = ccw_device_wake_up;
 497         if (cdev->private->state != DEV_STATE_ONLINE)
 498                 ret = -ENODEV;
 499         else if (((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) &&
 500                   !(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) ||
 501                  cdev->private->flags.doverify)
 502                 ret = -EBUSY;
 503         else
 504                 /* 0x00D9C3C4 == ebcdic "RCD" */
 505                 ret = __ccw_device_retry_loop(cdev, rcd_ccw, 0x00D9C3C4, lpm);
 506
 507         /* Restore interrupt handler. */
 508         cdev->handler = handler;
 509         spin_unlock_irq(sch->lock);
 510
 511         /*
 512          * on success we update the user input parms
 513          */
 514         if (ret) {
 515                 kfree (rcd_buf);
 516                 *buffer = NULL;
 517                 *length = 0;
 518         } else {
 519                 *length = ciw->count;
 520                 *buffer = rcd_buf;
 521         }
 522         kfree(rcd_ccw);
 523
 524         return ret;
 525 }
 526
 527 /*
 528  *  Read Configuration data
 529  */
 530 int
 531 read_conf_data (struct ccw_device *cdev, void **buffer, int *length)
 532 {
 533         return read_conf_data_lpm (cdev, buffer, length, 0);
 534 }
 535
 536 /*
 537  * Try to break the lock on a boxed device.
 538  */
 539 int
 540 ccw_device_stlck(struct ccw_device *cdev)
 541 {
 542         void *buf, *buf2;
 543         unsigned long flags;
 544         struct subchannel *sch;
 545         int ret;
 546
 547         if (!cdev)
 548                 return -ENODEV;
 549
 550         if (cdev->drv && !cdev->private->options.force)
 551                 return -EINVAL;
 552
 553         sch = to_subchannel(cdev->dev.parent);
 554
 555         CIO_TRACE_EVENT(2, "stl lock");
 556         CIO_TRACE_EVENT(2, cdev->dev.bus_id);
 557
 558         buf = kmalloc(32*sizeof(char), GFP_DMA|GFP_KERNEL);
 559         if (!buf)
 560                 return -ENOMEM;
 561         buf2 = kmalloc(32*sizeof(char), GFP_DMA|GFP_KERNEL);
 562         if (!buf2) {
 563                 kfree(buf);
 564                 return -ENOMEM;
 565         }
 566         spin_lock_irqsave(sch->lock, flags);
 567         ret = cio_enable_subchannel(sch, 3);
 568         if (ret)
 569                 goto out_unlock;
 570         /*
 571          * Setup ccw. We chain an unconditional reserve and a release so we
 572          * only break the lock.
 573          */
 574         cdev->private->iccws[0].cmd_code = CCW_CMD_STLCK;
 575         cdev->private->iccws[0].cda = (__u32) __pa(buf);
 576         cdev->private->iccws[0].count = 32;
 577         cdev->private->iccws[0].flags = CCW_FLAG_CC;
 578         cdev->private->iccws[1].cmd_code = CCW_CMD_RELEASE;
 579         cdev->private->iccws[1].cda = (__u32) __pa(buf2);
 580         cdev->private->iccws[1].count = 32;
 581         cdev->private->iccws[1].flags = 0;
 582         ret = cio_start(sch, cdev->private->iccws, 0);
 583         if (ret) {
 584                 cio_disable_subchannel(sch); //FIXME: return code?
 585                 goto out_unlock;
 586         }
 587         cdev->private->irb.scsw.actl |= SCSW_ACTL_START_PEND;
 588         spin_unlock_irqrestore(sch->lock, flags);
 589         wait_event(cdev->private->wait_q, cdev->private->irb.scsw.actl == 0);
 590         spin_lock_irqsave(sch->lock, flags);
 591         cio_disable_subchannel(sch); //FIXME: return code?
 592         if ((cdev->private->irb.scsw.dstat !=
 593              (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) ||
 594             (cdev->private->irb.scsw.cstat != 0))
 595                 ret = -EIO;
 596         /* Clear irb. */
 597         memset(&cdev->private->irb, 0, sizeof(struct irb));
 598 out_unlock:
 599         kfree(buf);
 600         kfree(buf2);
 601         spin_unlock_irqrestore(sch->lock, flags);
 602         return ret;
 603 }
 604
 605 void *
 606 ccw_device_get_chp_desc(struct ccw_device *cdev, int chp_no)
 607 {
 608         struct subchannel *sch;
 609
 610         sch = to_subchannel(cdev->dev.parent);
 611         return chsc_get_chp_desc(sch, chp_no);
 612 }
 613
 614 // FIXME: these have to go:
 615
 616 int
 617 _ccw_device_get_subchannel_number(struct ccw_device *cdev)
 618 {
 619         return cdev->private->schid.sch_no;
 620 }
 621
 622 int
 623 _ccw_device_get_device_number(struct ccw_device *cdev)
 624 {
 625         return cdev->private->dev_id.devno;
 626 }
 627
 628
 629 MODULE_LICENSE("GPL");
 630 EXPORT_SYMBOL(ccw_device_set_options_mask);
 631 EXPORT_SYMBOL(ccw_device_set_options);
 632 EXPORT_SYMBOL(ccw_device_clear_options);
 633 EXPORT_SYMBOL(ccw_device_clear);
 634 EXPORT_SYMBOL(ccw_device_halt);
 635 EXPORT_SYMBOL(ccw_device_resume);
 636 EXPORT_SYMBOL(ccw_device_start_timeout);
 637 EXPORT_SYMBOL(ccw_device_start);
 638 EXPORT_SYMBOL(ccw_device_start_timeout_key);
 639 EXPORT_SYMBOL(ccw_device_start_key);
 640 EXPORT_SYMBOL(ccw_device_get_ciw);
 641 EXPORT_SYMBOL(ccw_device_get_path_mask);
 642 EXPORT_SYMBOL(read_conf_data);
 643 EXPORT_SYMBOL(read_dev_chars);
 644 EXPORT_SYMBOL(_ccw_device_get_subchannel_number);
 645 EXPORT_SYMBOL(_ccw_device_get_device_number);
 646 EXPORT_SYMBOL_GPL(ccw_device_get_chp_desc);
 647 EXPORT_SYMBOL_GPL(read_conf_data_lpm);