drivers/s390/crypto/zcrypt_api.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *  Copyright IBM Corp. 2001, 2018
   4  *  Author(s): Robert Burroughs
   5  *             Eric Rossman (edrossma@us.ibm.com)
   6  *             Cornelia Huck <cornelia.huck@de.ibm.com>
   7  *
   8  *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
   9  *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
  10  *                                Ralph Wuerthner <rwuerthn@de.ibm.com>
  11  *  MSGTYPE restruct:             Holger Dengler <hd@linux.vnet.ibm.com>
  12  *  Multiple device nodes: Harald Freudenberger <freude@linux.ibm.com>
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/init.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/miscdevice.h>
  19 #include <linux/fs.h>
  20 #include <linux/compat.h>
  21 #include <linux/slab.h>
  22 #include <linux/atomic.h>
  23 #include <linux/uaccess.h>
  24 #include <linux/hw_random.h>
  25 #include <linux/debugfs.h>
  26 #include <linux/cdev.h>
  27 #include <linux/ctype.h>
  28 #include <asm/debug.h>
  29
  30 #define CREATE_TRACE_POINTS
  31 #include <asm/trace/zcrypt.h>
  32
  33 #include "zcrypt_api.h"
  34 #include "zcrypt_debug.h"
  35
  36 #include "zcrypt_msgtype6.h"
  37 #include "zcrypt_msgtype50.h"
  38
  39 /*
  40  * Module description.
  41  */
  42 MODULE_AUTHOR("IBM Corporation");
  43 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
  44                    "Copyright IBM Corp. 2001, 2012");
  45 MODULE_LICENSE("GPL");
  46
  47 /*
  48  * zcrypt tracepoint functions
  49  */
  50 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
  51 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
  52
  53 static int zcrypt_hwrng_seed = 1;
  54 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
  55 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
  56
  57 DEFINE_SPINLOCK(zcrypt_list_lock);
  58 LIST_HEAD(zcrypt_card_list);
  59 int zcrypt_device_count;
  60
  61 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
  62 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
  63
  64 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
  65 EXPORT_SYMBOL(zcrypt_rescan_req);
  66
  67 static LIST_HEAD(zcrypt_ops_list);
  68
  69 /* Zcrypt related debug feature stuff. */
  70 debug_info_t *zcrypt_dbf_info;
  71
  72 /**
  73  * Process a rescan of the transport layer.
  74  *
  75  * Returns 1, if the rescan has been processed, otherwise 0.
  76  */
  77 static inline int zcrypt_process_rescan(void)
  78 {
  79         if (atomic_read(&zcrypt_rescan_req)) {
  80                 atomic_set(&zcrypt_rescan_req, 0);
  81                 atomic_inc(&zcrypt_rescan_count);
  82                 ap_bus_force_rescan();
  83                 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
  84                            atomic_inc_return(&zcrypt_rescan_count));
  85                 return 1;
  86         }
  87         return 0;
  88 }
  89
  90 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
  91 {
  92         list_add_tail(&zops->list, &zcrypt_ops_list);
  93 }
  94
  95 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
  96 {
  97         list_del_init(&zops->list);
  98 }
  99
 100 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
 101 {
 102         struct zcrypt_ops *zops;
 103
 104         list_for_each_entry(zops, &zcrypt_ops_list, list)
 105                 if ((zops->variant == variant) &&
 106                     (!strncmp(zops->name, name, sizeof(zops->name))))
 107                         return zops;
 108         return NULL;
 109 }
 110 EXPORT_SYMBOL(zcrypt_msgtype);
 111
 112 /*
 113  * Multi device nodes extension functions.
 114  */
 115
 116 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 117
 118 struct zcdn_device;
 119
 120 static struct class *zcrypt_class;
 121 static dev_t zcrypt_devt;
 122 static struct cdev zcrypt_cdev;
 123
 124 struct zcdn_device {
 125         struct device device;
 126         struct ap_perms perms;
 127 };
 128
 129 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
 130
 131 #define ZCDN_MAX_NAME 32
 132
 133 static int zcdn_create(const char *name);
 134 static int zcdn_destroy(const char *name);
 135
 136 /* helper function, matches the name for find_zcdndev_by_name() */
 137 static int __match_zcdn_name(struct device *dev, const void *data)
 138 {
 139         return strcmp(dev_name(dev), (const char *)data) == 0;
 140 }
 141
 142 /* helper function, matches the devt value for find_zcdndev_by_devt() */
 143 static int __match_zcdn_devt(struct device *dev, const void *data)
 144 {
 145         return dev->devt == *((dev_t *) data);
 146 }
 147
 148 /*
 149  * Find zcdn device by name.
 150  * Returns reference to the zcdn device which needs to be released
 151  * with put_device() after use.
 152  */
 153 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
 154 {
 155         struct device *dev =
 156                 class_find_device(zcrypt_class, NULL,
 157                                   (void *) name,
 158                                   __match_zcdn_name);
 159
 160         return dev ? to_zcdn_dev(dev) : NULL;
 161 }
 162
 163 /*
 164  * Find zcdn device by devt value.
 165  * Returns reference to the zcdn device which needs to be released
 166  * with put_device() after use.
 167  */
 168 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
 169 {
 170         struct device *dev =
 171                 class_find_device(zcrypt_class, NULL,
 172                                   (void *) &devt,
 173                                   __match_zcdn_devt);
 174
 175         return dev ? to_zcdn_dev(dev) : NULL;
 176 }
 177
 178 static ssize_t ioctlmask_show(struct device *dev,
 179                               struct device_attribute *attr,
 180                               char *buf)
 181 {
 182         int i, rc;
 183         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 184
 185         if (mutex_lock_interruptible(&ap_perms_mutex))
 186                 return -ERESTARTSYS;
 187
 188         buf[0] = '0';
 189         buf[1] = 'x';
 190         for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
 191                 snprintf(buf + 2 + 2 * i * sizeof(long),
 192                          PAGE_SIZE - 2 - 2 * i * sizeof(long),
 193                          "%016lx", zcdndev->perms.ioctlm[i]);
 194         buf[2 + 2 * i * sizeof(long)] = '\n';
 195         buf[2 + 2 * i * sizeof(long) + 1] = '\0';
 196         rc = 2 + 2 * i * sizeof(long) + 1;
 197
 198         mutex_unlock(&ap_perms_mutex);
 199
 200         return rc;
 201 }
 202
 203 static ssize_t ioctlmask_store(struct device *dev,
 204                                struct device_attribute *attr,
 205                                const char *buf, size_t count)
 206 {
 207         int rc;
 208         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 209
 210         rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
 211                                AP_IOCTLS, &ap_perms_mutex);
 212         if (rc)
 213                 return rc;
 214
 215         return count;
 216 }
 217
 218 static DEVICE_ATTR_RW(ioctlmask);
 219
 220 static ssize_t apmask_show(struct device *dev,
 221                            struct device_attribute *attr,
 222                            char *buf)
 223 {
 224         int i, rc;
 225         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 226
 227         if (mutex_lock_interruptible(&ap_perms_mutex))
 228                 return -ERESTARTSYS;
 229
 230         buf[0] = '0';
 231         buf[1] = 'x';
 232         for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
 233                 snprintf(buf + 2 + 2 * i * sizeof(long),
 234                          PAGE_SIZE - 2 - 2 * i * sizeof(long),
 235                          "%016lx", zcdndev->perms.apm[i]);
 236         buf[2 + 2 * i * sizeof(long)] = '\n';
 237         buf[2 + 2 * i * sizeof(long) + 1] = '\0';
 238         rc = 2 + 2 * i * sizeof(long) + 1;
 239
 240         mutex_unlock(&ap_perms_mutex);
 241
 242         return rc;
 243 }
 244
 245 static ssize_t apmask_store(struct device *dev,
 246                             struct device_attribute *attr,
 247                             const char *buf, size_t count)
 248 {
 249         int rc;
 250         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 251
 252         rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
 253                                AP_DEVICES, &ap_perms_mutex);
 254         if (rc)
 255                 return rc;
 256
 257         return count;
 258 }
 259
 260 static DEVICE_ATTR_RW(apmask);
 261
 262 static ssize_t aqmask_show(struct device *dev,
 263                            struct device_attribute *attr,
 264                            char *buf)
 265 {
 266         int i, rc;
 267         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 268
 269         if (mutex_lock_interruptible(&ap_perms_mutex))
 270                 return -ERESTARTSYS;
 271
 272         buf[0] = '0';
 273         buf[1] = 'x';
 274         for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
 275                 snprintf(buf + 2 + 2 * i * sizeof(long),
 276                          PAGE_SIZE - 2 - 2 * i * sizeof(long),
 277                          "%016lx", zcdndev->perms.aqm[i]);
 278         buf[2 + 2 * i * sizeof(long)] = '\n';
 279         buf[2 + 2 * i * sizeof(long) + 1] = '\0';
 280         rc = 2 + 2 * i * sizeof(long) + 1;
 281
 282         mutex_unlock(&ap_perms_mutex);
 283
 284         return rc;
 285 }
 286
 287 static ssize_t aqmask_store(struct device *dev,
 288                             struct device_attribute *attr,
 289                             const char *buf, size_t count)
 290 {
 291         int rc;
 292         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 293
 294         rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
 295                                AP_DOMAINS, &ap_perms_mutex);
 296         if (rc)
 297                 return rc;
 298
 299         return count;
 300 }
 301
 302 static DEVICE_ATTR_RW(aqmask);
 303
 304 static struct attribute *zcdn_dev_attrs[] = {
 305         &dev_attr_ioctlmask.attr,
 306         &dev_attr_apmask.attr,
 307         &dev_attr_aqmask.attr,
 308         NULL
 309 };
 310
 311 static struct attribute_group zcdn_dev_attr_group = {
 312         .attrs = zcdn_dev_attrs
 313 };
 314
 315 static const struct attribute_group *zcdn_dev_attr_groups[] = {
 316         &zcdn_dev_attr_group,
 317         NULL
 318 };
 319
 320 static ssize_t zcdn_create_store(struct class *class,
 321                                  struct class_attribute *attr,
 322                                  const char *buf, size_t count)
 323 {
 324         int rc;
 325         char name[ZCDN_MAX_NAME];
 326
 327         strncpy(name, skip_spaces(buf), sizeof(name));
 328         name[sizeof(name) - 1] = '\0';
 329
 330         rc = zcdn_create(strim(name));
 331
 332         return rc ? rc : count;
 333 }
 334
 335 static const struct class_attribute class_attr_zcdn_create =
 336         __ATTR(create, 0600, NULL, zcdn_create_store);
 337
 338 static ssize_t zcdn_destroy_store(struct class *class,
 339                                   struct class_attribute *attr,
 340                                   const char *buf, size_t count)
 341 {
 342         int rc;
 343         char name[ZCDN_MAX_NAME];
 344
 345         strncpy(name, skip_spaces(buf), sizeof(name));
 346         name[sizeof(name) - 1] = '\0';
 347
 348         rc = zcdn_destroy(strim(name));
 349
 350         return rc ? rc : count;
 351 }
 352
 353 static const struct class_attribute class_attr_zcdn_destroy =
 354         __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
 355
 356 static void zcdn_device_release(struct device *dev)
 357 {
 358         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 359
 360         ZCRYPT_DBF(DBF_INFO, "releasing zcdn device %d:%d\n",
 361                    MAJOR(dev->devt), MINOR(dev->devt));
 362
 363         kfree(zcdndev);
 364 }
 365
 366 static int zcdn_create(const char *name)
 367 {
 368         dev_t devt;
 369         int i, rc = 0;
 370         char nodename[ZCDN_MAX_NAME];
 371         struct zcdn_device *zcdndev;
 372
 373         if (mutex_lock_interruptible(&ap_perms_mutex))
 374                 return -ERESTARTSYS;
 375
 376         /* check if device node with this name already exists */
 377         if (name[0]) {
 378                 zcdndev = find_zcdndev_by_name(name);
 379                 if (zcdndev) {
 380                         put_device(&zcdndev->device);
 381                         rc = -EEXIST;
 382                         goto unlockout;
 383                 }
 384         }
 385
 386         /* find an unused minor number */
 387         for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
 388                 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
 389                 zcdndev = find_zcdndev_by_devt(devt);
 390                 if (zcdndev)
 391                         put_device(&zcdndev->device);
 392                 else
 393                         break;
 394         }
 395         if (i == ZCRYPT_MAX_MINOR_NODES) {
 396                 rc = -ENOSPC;
 397                 goto unlockout;
 398         }
 399
 400         /* alloc and prepare a new zcdn device */
 401         zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
 402         if (!zcdndev) {
 403                 rc = -ENOMEM;
 404                 goto unlockout;
 405         }
 406         zcdndev->device.release = zcdn_device_release;
 407         zcdndev->device.class = zcrypt_class;
 408         zcdndev->device.devt = devt;
 409         zcdndev->device.groups = zcdn_dev_attr_groups;
 410         if (name[0])
 411                 strncpy(nodename, name, sizeof(nodename));
 412         else
 413                 snprintf(nodename, sizeof(nodename),
 414                          ZCRYPT_NAME "_%d", (int) MINOR(devt));
 415         nodename[sizeof(nodename)-1] = '\0';
 416         if (dev_set_name(&zcdndev->device, nodename)) {
 417                 rc = -EINVAL;
 418                 goto unlockout;
 419         }
 420         rc = device_register(&zcdndev->device);
 421         if (rc) {
 422                 put_device(&zcdndev->device);
 423                 goto unlockout;
 424         }
 425
 426         ZCRYPT_DBF(DBF_INFO, "created zcdn device %d:%d\n",
 427                    MAJOR(devt), MINOR(devt));
 428
 429 unlockout:
 430         mutex_unlock(&ap_perms_mutex);
 431         return rc;
 432 }
 433
 434 static int zcdn_destroy(const char *name)
 435 {
 436         int rc = 0;
 437         struct zcdn_device *zcdndev;
 438
 439         if (mutex_lock_interruptible(&ap_perms_mutex))
 440                 return -ERESTARTSYS;
 441
 442         /* try to find this zcdn device */
 443         zcdndev = find_zcdndev_by_name(name);
 444         if (!zcdndev) {
 445                 rc = -ENOENT;
 446                 goto unlockout;
 447         }
 448
 449         /*
 450          * The zcdn device is not hard destroyed. It is subject to
 451          * reference counting and thus just needs to be unregistered.
 452          */
 453         put_device(&zcdndev->device);
 454         device_unregister(&zcdndev->device);
 455
 456 unlockout:
 457         mutex_unlock(&ap_perms_mutex);
 458         return rc;
 459 }
 460
 461 static void zcdn_destroy_all(void)
 462 {
 463         int i;
 464         dev_t devt;
 465         struct zcdn_device *zcdndev;
 466
 467         mutex_lock(&ap_perms_mutex);
 468         for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
 469                 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
 470                 zcdndev = find_zcdndev_by_devt(devt);
 471                 if (zcdndev) {
 472                         put_device(&zcdndev->device);
 473                         device_unregister(&zcdndev->device);
 474                 }
 475         }
 476         mutex_unlock(&ap_perms_mutex);
 477 }
 478
 479 #endif
 480
 481 /**
 482  * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
 483  *
 484  * This function is not supported beyond zcrypt 1.3.1.
 485  */
 486 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
 487                            size_t count, loff_t *f_pos)
 488 {
 489         return -EPERM;
 490 }
 491
 492 /**
 493  * zcrypt_write(): Not allowed.
 494  *
 495  * Write is is not allowed
 496  */
 497 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
 498                             size_t count, loff_t *f_pos)
 499 {
 500         return -EPERM;
 501 }
 502
 503 /**
 504  * zcrypt_open(): Count number of users.
 505  *
 506  * Device open function to count number of users.
 507  */
 508 static int zcrypt_open(struct inode *inode, struct file *filp)
 509 {
 510         struct ap_perms *perms = &ap_perms;
 511
 512 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 513         if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 514                 struct zcdn_device *zcdndev;
 515
 516                 if (mutex_lock_interruptible(&ap_perms_mutex))
 517                         return -ERESTARTSYS;
 518                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 519                 /* find returns a reference, no get_device() needed */
 520                 mutex_unlock(&ap_perms_mutex);
 521                 if (zcdndev)
 522                         perms = &zcdndev->perms;
 523         }
 524 #endif
 525         filp->private_data = (void *) perms;
 526
 527         atomic_inc(&zcrypt_open_count);
 528         return nonseekable_open(inode, filp);
 529 }
 530
 531 /**
 532  * zcrypt_release(): Count number of users.
 533  *
 534  * Device close function to count number of users.
 535  */
 536 static int zcrypt_release(struct inode *inode, struct file *filp)
 537 {
 538 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 539         if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 540                 struct zcdn_device *zcdndev;
 541
 542                 if (mutex_lock_interruptible(&ap_perms_mutex))
 543                         return -ERESTARTSYS;
 544                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 545                 mutex_unlock(&ap_perms_mutex);
 546                 if (zcdndev) {
 547                         /* 2 puts here: one for find, one for open */
 548                         put_device(&zcdndev->device);
 549                         put_device(&zcdndev->device);
 550                 }
 551         }
 552 #endif
 553
 554         atomic_dec(&zcrypt_open_count);
 555         return 0;
 556 }
 557
 558 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
 559                                      unsigned int cmd)
 560 {
 561         int rc = -EPERM;
 562         int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
 563
 564         if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
 565                 if (test_bit_inv(ioctlnr, perms->ioctlm))
 566                         rc = 0;
 567         }
 568
 569         if (rc)
 570                 ZCRYPT_DBF(DBF_WARN,
 571                            "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
 572                            ioctlnr, rc);
 573
 574         return rc;
 575 }
 576
 577 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
 578 {
 579         return test_bit_inv(card, perms->apm) ? true : false;
 580 }
 581
 582 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
 583 {
 584         return test_bit_inv(queue, perms->aqm) ? true : false;
 585 }
 586
 587 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
 588                                                      struct zcrypt_queue *zq,
 589                                                      struct module **pmod,
 590                                                      unsigned int weight)
 591 {
 592         if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
 593                 return NULL;
 594         zcrypt_queue_get(zq);
 595         get_device(&zq->queue->ap_dev.device);
 596         atomic_add(weight, &zc->load);
 597         atomic_add(weight, &zq->load);
 598         zq->request_count++;
 599         *pmod = zq->queue->ap_dev.drv->driver.owner;
 600         return zq;
 601 }
 602
 603 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
 604                                      struct zcrypt_queue *zq,
 605                                      struct module *mod,
 606                                      unsigned int weight)
 607 {
 608         zq->request_count--;
 609         atomic_sub(weight, &zc->load);
 610         atomic_sub(weight, &zq->load);
 611         put_device(&zq->queue->ap_dev.device);
 612         zcrypt_queue_put(zq);
 613         module_put(mod);
 614 }
 615
 616 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
 617                                        struct zcrypt_card *pref_zc,
 618                                        unsigned int weight,
 619                                        unsigned int pref_weight)
 620 {
 621         if (!pref_zc)
 622                 return false;
 623         weight += atomic_read(&zc->load);
 624         pref_weight += atomic_read(&pref_zc->load);
 625         if (weight == pref_weight)
 626                 return atomic_read(&zc->card->total_request_count) >
 627                         atomic_read(&pref_zc->card->total_request_count);
 628         return weight > pref_weight;
 629 }
 630
 631 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
 632                                         struct zcrypt_queue *pref_zq,
 633                                         unsigned int weight,
 634                                         unsigned int pref_weight)
 635 {
 636         if (!pref_zq)
 637                 return false;
 638         weight += atomic_read(&zq->load);
 639         pref_weight += atomic_read(&pref_zq->load);
 640         if (weight == pref_weight)
 641                 return zq->queue->total_request_count >
 642                         pref_zq->queue->total_request_count;
 643         return weight > pref_weight;
 644 }
 645
 646 /*
 647  * zcrypt ioctls.
 648  */
 649 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
 650                                struct ica_rsa_modexpo *mex)
 651 {
 652         struct zcrypt_card *zc, *pref_zc;
 653         struct zcrypt_queue *zq, *pref_zq;
 654         unsigned int weight, pref_weight;
 655         unsigned int func_code;
 656         int qid = 0, rc = -ENODEV;
 657         struct module *mod;
 658
 659         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
 660
 661         if (mex->outputdatalength < mex->inputdatalength) {
 662                 rc = -EINVAL;
 663                 goto out;
 664         }
 665
 666         /*
 667          * As long as outputdatalength is big enough, we can set the
 668          * outputdatalength equal to the inputdatalength, since that is the
 669          * number of bytes we will copy in any case
 670          */
 671         mex->outputdatalength = mex->inputdatalength;
 672
 673         rc = get_rsa_modex_fc(mex, &func_code);
 674         if (rc)
 675                 goto out;
 676
 677         pref_zc = NULL;
 678         pref_zq = NULL;
 679         spin_lock(&zcrypt_list_lock);
 680         for_each_zcrypt_card(zc) {
 681                 /* Check for online accelarator and CCA cards */
 682                 if (!zc->online || !(zc->card->functions & 0x18000000))
 683                         continue;
 684                 /* Check for size limits */
 685                 if (zc->min_mod_size > mex->inputdatalength ||
 686                     zc->max_mod_size < mex->inputdatalength)
 687                         continue;
 688                 /* check if device node has admission for this card */
 689                 if (!zcrypt_check_card(perms, zc->card->id))
 690                         continue;
 691                 /* get weight index of the card device  */
 692                 weight = zc->speed_rating[func_code];
 693                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 694                         continue;
 695                 for_each_zcrypt_queue(zq, zc) {
 696                         /* check if device is online and eligible */
 697                         if (!zq->online || !zq->ops->rsa_modexpo)
 698                                 continue;
 699                         /* check if device node has admission for this queue */
 700                         if (!zcrypt_check_queue(perms,
 701                                                 AP_QID_QUEUE(zq->queue->qid)))
 702                                 continue;
 703                         if (zcrypt_queue_compare(zq, pref_zq,
 704                                                  weight, pref_weight))
 705                                 continue;
 706                         pref_zc = zc;
 707                         pref_zq = zq;
 708                         pref_weight = weight;
 709                 }
 710         }
 711         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 712         spin_unlock(&zcrypt_list_lock);
 713
 714         if (!pref_zq) {
 715                 rc = -ENODEV;
 716                 goto out;
 717         }
 718
 719         qid = pref_zq->queue->qid;
 720         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
 721
 722         spin_lock(&zcrypt_list_lock);
 723         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 724         spin_unlock(&zcrypt_list_lock);
 725
 726 out:
 727         trace_s390_zcrypt_rep(mex, func_code, rc,
 728                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 729         return rc;
 730 }
 731
 732 static long zcrypt_rsa_crt(struct ap_perms *perms,
 733                            struct ica_rsa_modexpo_crt *crt)
 734 {
 735         struct zcrypt_card *zc, *pref_zc;
 736         struct zcrypt_queue *zq, *pref_zq;
 737         unsigned int weight, pref_weight;
 738         unsigned int func_code;
 739         int qid = 0, rc = -ENODEV;
 740         struct module *mod;
 741
 742         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
 743
 744         if (crt->outputdatalength < crt->inputdatalength) {
 745                 rc = -EINVAL;
 746                 goto out;
 747         }
 748
 749         /*
 750          * As long as outputdatalength is big enough, we can set the
 751          * outputdatalength equal to the inputdatalength, since that is the
 752          * number of bytes we will copy in any case
 753          */
 754         crt->outputdatalength = crt->inputdatalength;
 755
 756         rc = get_rsa_crt_fc(crt, &func_code);
 757         if (rc)
 758                 goto out;
 759
 760         pref_zc = NULL;
 761         pref_zq = NULL;
 762         spin_lock(&zcrypt_list_lock);
 763         for_each_zcrypt_card(zc) {
 764                 /* Check for online accelarator and CCA cards */
 765                 if (!zc->online || !(zc->card->functions & 0x18000000))
 766                         continue;
 767                 /* Check for size limits */
 768                 if (zc->min_mod_size > crt->inputdatalength ||
 769                     zc->max_mod_size < crt->inputdatalength)
 770                         continue;
 771                 /* check if device node has admission for this card */
 772                 if (!zcrypt_check_card(perms, zc->card->id))
 773                         continue;
 774                 /* get weight index of the card device  */
 775                 weight = zc->speed_rating[func_code];
 776                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 777                         continue;
 778                 for_each_zcrypt_queue(zq, zc) {
 779                         /* check if device is online and eligible */
 780                         if (!zq->online || !zq->ops->rsa_modexpo_crt)
 781                                 continue;
 782                         /* check if device node has admission for this queue */
 783                         if (!zcrypt_check_queue(perms,
 784                                                 AP_QID_QUEUE(zq->queue->qid)))
 785                                 continue;
 786                         if (zcrypt_queue_compare(zq, pref_zq,
 787                                                  weight, pref_weight))
 788                                 continue;
 789                         pref_zc = zc;
 790                         pref_zq = zq;
 791                         pref_weight = weight;
 792                 }
 793         }
 794         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 795         spin_unlock(&zcrypt_list_lock);
 796
 797         if (!pref_zq) {
 798                 rc = -ENODEV;
 799                 goto out;
 800         }
 801
 802         qid = pref_zq->queue->qid;
 803         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
 804
 805         spin_lock(&zcrypt_list_lock);
 806         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 807         spin_unlock(&zcrypt_list_lock);
 808
 809 out:
 810         trace_s390_zcrypt_rep(crt, func_code, rc,
 811                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 812         return rc;
 813 }
 814
 815 static long _zcrypt_send_cprb(struct ap_perms *perms,
 816                               struct ica_xcRB *xcRB)
 817 {
 818         struct zcrypt_card *zc, *pref_zc;
 819         struct zcrypt_queue *zq, *pref_zq;
 820         struct ap_message ap_msg;
 821         unsigned int weight, pref_weight;
 822         unsigned int func_code;
 823         unsigned short *domain;
 824         int qid = 0, rc = -ENODEV;
 825         struct module *mod;
 826
 827         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
 828
 829         xcRB->status = 0;
 830         ap_init_message(&ap_msg);
 831         rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
 832         if (rc)
 833                 goto out;
 834
 835         pref_zc = NULL;
 836         pref_zq = NULL;
 837         spin_lock(&zcrypt_list_lock);
 838         for_each_zcrypt_card(zc) {
 839                 /* Check for online CCA cards */
 840                 if (!zc->online || !(zc->card->functions & 0x10000000))
 841                         continue;
 842                 /* Check for user selected CCA card */
 843                 if (xcRB->user_defined != AUTOSELECT &&
 844                     xcRB->user_defined != zc->card->id)
 845                         continue;
 846                 /* check if device node has admission for this card */
 847                 if (!zcrypt_check_card(perms, zc->card->id))
 848                         continue;
 849                 /* get weight index of the card device  */
 850                 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 851                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 852                         continue;
 853                 for_each_zcrypt_queue(zq, zc) {
 854                         /* check if device is online and eligible */
 855                         if (!zq->online ||
 856                             !zq->ops->send_cprb ||
 857                             ((*domain != (unsigned short) AUTOSELECT) &&
 858                              (*domain != AP_QID_QUEUE(zq->queue->qid))))
 859                                 continue;
 860                         /* check if device node has admission for this queue */
 861                         if (!zcrypt_check_queue(perms,
 862                                                 AP_QID_QUEUE(zq->queue->qid)))
 863                                 continue;
 864                         if (zcrypt_queue_compare(zq, pref_zq,
 865                                                  weight, pref_weight))
 866                                 continue;
 867                         pref_zc = zc;
 868                         pref_zq = zq;
 869                         pref_weight = weight;
 870                 }
 871         }
 872         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 873         spin_unlock(&zcrypt_list_lock);
 874
 875         if (!pref_zq) {
 876                 rc = -ENODEV;
 877                 goto out;
 878         }
 879
 880         /* in case of auto select, provide the correct domain */
 881         qid = pref_zq->queue->qid;
 882         if (*domain == (unsigned short) AUTOSELECT)
 883                 *domain = AP_QID_QUEUE(qid);
 884
 885         rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
 886
 887         spin_lock(&zcrypt_list_lock);
 888         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 889         spin_unlock(&zcrypt_list_lock);
 890
 891 out:
 892         ap_release_message(&ap_msg);
 893         trace_s390_zcrypt_rep(xcRB, func_code, rc,
 894                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 895         return rc;
 896 }
 897
 898 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
 899 {
 900         return _zcrypt_send_cprb(&ap_perms, xcRB);
 901 }
 902 EXPORT_SYMBOL(zcrypt_send_cprb);
 903
 904 static bool is_desired_ep11_card(unsigned int dev_id,
 905                                  unsigned short target_num,
 906                                  struct ep11_target_dev *targets)
 907 {
 908         while (target_num-- > 0) {
 909                 if (dev_id == targets->ap_id)
 910                         return true;
 911                 targets++;
 912         }
 913         return false;
 914 }
 915
 916 static bool is_desired_ep11_queue(unsigned int dev_qid,
 917                                   unsigned short target_num,
 918                                   struct ep11_target_dev *targets)
 919 {
 920         while (target_num-- > 0) {
 921                 if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
 922                         return true;
 923                 targets++;
 924         }
 925         return false;
 926 }
 927
 928 static long zcrypt_send_ep11_cprb(struct ap_perms *perms,
 929                                   struct ep11_urb *xcrb)
 930 {
 931         struct zcrypt_card *zc, *pref_zc;
 932         struct zcrypt_queue *zq, *pref_zq;
 933         struct ep11_target_dev *targets;
 934         unsigned short target_num;
 935         unsigned int weight, pref_weight;
 936         unsigned int func_code;
 937         struct ap_message ap_msg;
 938         int qid = 0, rc = -ENODEV;
 939         struct module *mod;
 940
 941         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
 942
 943         ap_init_message(&ap_msg);
 944
 945         target_num = (unsigned short) xcrb->targets_num;
 946
 947         /* empty list indicates autoselect (all available targets) */
 948         targets = NULL;
 949         if (target_num != 0) {
 950                 struct ep11_target_dev __user *uptr;
 951
 952                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
 953                 if (!targets) {
 954                         rc = -ENOMEM;
 955                         goto out;
 956                 }
 957
 958                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
 959                 if (copy_from_user(targets, uptr,
 960                                    target_num * sizeof(*targets))) {
 961                         rc = -EFAULT;
 962                         goto out_free;
 963                 }
 964         }
 965
 966         rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
 967         if (rc)
 968                 goto out_free;
 969
 970         pref_zc = NULL;
 971         pref_zq = NULL;
 972         spin_lock(&zcrypt_list_lock);
 973         for_each_zcrypt_card(zc) {
 974                 /* Check for online EP11 cards */
 975                 if (!zc->online || !(zc->card->functions & 0x04000000))
 976                         continue;
 977                 /* Check for user selected EP11 card */
 978                 if (targets &&
 979                     !is_desired_ep11_card(zc->card->id, target_num, targets))
 980                         continue;
 981                 /* check if device node has admission for this card */
 982                 if (!zcrypt_check_card(perms, zc->card->id))
 983                         continue;
 984                 /* get weight index of the card device  */
 985                 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
 986                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 987                         continue;
 988                 for_each_zcrypt_queue(zq, zc) {
 989                         /* check if device is online and eligible */
 990                         if (!zq->online ||
 991                             !zq->ops->send_ep11_cprb ||
 992                             (targets &&
 993                              !is_desired_ep11_queue(zq->queue->qid,
 994                                                     target_num, targets)))
 995                                 continue;
 996                         /* check if device node has admission for this queue */
 997                         if (!zcrypt_check_queue(perms,
 998                                                 AP_QID_QUEUE(zq->queue->qid)))
 999                                 continue;
1000                         if (zcrypt_queue_compare(zq, pref_zq,
1001                                                  weight, pref_weight))
1002                                 continue;
1003                         pref_zc = zc;
1004                         pref_zq = zq;
1005                         pref_weight = weight;
1006                 }
1007         }
1008         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1009         spin_unlock(&zcrypt_list_lock);
1010
1011         if (!pref_zq) {
1012                 rc = -ENODEV;
1013                 goto out_free;
1014         }
1015
1016         qid = pref_zq->queue->qid;
1017         rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
1018
1019         spin_lock(&zcrypt_list_lock);
1020         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1021         spin_unlock(&zcrypt_list_lock);
1022
1023 out_free:
1024         kfree(targets);
1025 out:
1026         ap_release_message(&ap_msg);
1027         trace_s390_zcrypt_rep(xcrb, func_code, rc,
1028                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1029         return rc;
1030 }
1031
1032 static long zcrypt_rng(char *buffer)
1033 {
1034         struct zcrypt_card *zc, *pref_zc;
1035         struct zcrypt_queue *zq, *pref_zq;
1036         unsigned int weight, pref_weight;
1037         unsigned int func_code;
1038         struct ap_message ap_msg;
1039         unsigned int domain;
1040         int qid = 0, rc = -ENODEV;
1041         struct module *mod;
1042
1043         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1044
1045         ap_init_message(&ap_msg);
1046         rc = get_rng_fc(&ap_msg, &func_code, &domain);
1047         if (rc)
1048                 goto out;
1049
1050         pref_zc = NULL;
1051         pref_zq = NULL;
1052         spin_lock(&zcrypt_list_lock);
1053         for_each_zcrypt_card(zc) {
1054                 /* Check for online CCA cards */
1055                 if (!zc->online || !(zc->card->functions & 0x10000000))
1056                         continue;
1057                 /* get weight index of the card device  */
1058                 weight = zc->speed_rating[func_code];
1059                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1060                         continue;
1061                 for_each_zcrypt_queue(zq, zc) {
1062                         /* check if device is online and eligible */
1063                         if (!zq->online || !zq->ops->rng)
1064                                 continue;
1065                         if (zcrypt_queue_compare(zq, pref_zq,
1066                                                  weight, pref_weight))
1067                                 continue;
1068                         pref_zc = zc;
1069                         pref_zq = zq;
1070                         pref_weight = weight;
1071                 }
1072         }
1073         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1074         spin_unlock(&zcrypt_list_lock);
1075
1076         if (!pref_zq) {
1077                 rc = -ENODEV;
1078                 goto out;
1079         }
1080
1081         qid = pref_zq->queue->qid;
1082         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1083
1084         spin_lock(&zcrypt_list_lock);
1085         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1086         spin_unlock(&zcrypt_list_lock);
1087
1088 out:
1089         ap_release_message(&ap_msg);
1090         trace_s390_zcrypt_rep(buffer, func_code, rc,
1091                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1092         return rc;
1093 }
1094
1095 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1096 {
1097         struct zcrypt_card *zc;
1098         struct zcrypt_queue *zq;
1099         struct zcrypt_device_status *stat;
1100         int card, queue;
1101
1102         memset(devstatus, 0, MAX_ZDEV_ENTRIES
1103                * sizeof(struct zcrypt_device_status));
1104
1105         spin_lock(&zcrypt_list_lock);
1106         for_each_zcrypt_card(zc) {
1107                 for_each_zcrypt_queue(zq, zc) {
1108                         card = AP_QID_CARD(zq->queue->qid);
1109                         if (card >= MAX_ZDEV_CARDIDS)
1110                                 continue;
1111                         queue = AP_QID_QUEUE(zq->queue->qid);
1112                         stat = &devstatus[card * AP_DOMAINS + queue];
1113                         stat->hwtype = zc->card->ap_dev.device_type;
1114                         stat->functions = zc->card->functions >> 26;
1115                         stat->qid = zq->queue->qid;
1116                         stat->online = zq->online ? 0x01 : 0x00;
1117                 }
1118         }
1119         spin_unlock(&zcrypt_list_lock);
1120 }
1121
1122 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1123 {
1124         struct zcrypt_card *zc;
1125         struct zcrypt_queue *zq;
1126         struct zcrypt_device_status_ext *stat;
1127         int card, queue;
1128
1129         memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1130                * sizeof(struct zcrypt_device_status_ext));
1131
1132         spin_lock(&zcrypt_list_lock);
1133         for_each_zcrypt_card(zc) {
1134                 for_each_zcrypt_queue(zq, zc) {
1135                         card = AP_QID_CARD(zq->queue->qid);
1136                         queue = AP_QID_QUEUE(zq->queue->qid);
1137                         stat = &devstatus[card * AP_DOMAINS + queue];
1138                         stat->hwtype = zc->card->ap_dev.device_type;
1139                         stat->functions = zc->card->functions >> 26;
1140                         stat->qid = zq->queue->qid;
1141                         stat->online = zq->online ? 0x01 : 0x00;
1142                 }
1143         }
1144         spin_unlock(&zcrypt_list_lock);
1145 }
1146 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1147
1148 static void zcrypt_status_mask(char status[], size_t max_adapters)
1149 {
1150         struct zcrypt_card *zc;
1151         struct zcrypt_queue *zq;
1152         int card;
1153
1154         memset(status, 0, max_adapters);
1155         spin_lock(&zcrypt_list_lock);
1156         for_each_zcrypt_card(zc) {
1157                 for_each_zcrypt_queue(zq, zc) {
1158                         card = AP_QID_CARD(zq->queue->qid);
1159                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1160                             || card >= max_adapters)
1161                                 continue;
1162                         status[card] = zc->online ? zc->user_space_type : 0x0d;
1163                 }
1164         }
1165         spin_unlock(&zcrypt_list_lock);
1166 }
1167
1168 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1169 {
1170         struct zcrypt_card *zc;
1171         struct zcrypt_queue *zq;
1172         int card;
1173
1174         memset(qdepth, 0, max_adapters);
1175         spin_lock(&zcrypt_list_lock);
1176         local_bh_disable();
1177         for_each_zcrypt_card(zc) {
1178                 for_each_zcrypt_queue(zq, zc) {
1179                         card = AP_QID_CARD(zq->queue->qid);
1180                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1181                             || card >= max_adapters)
1182                                 continue;
1183                         spin_lock(&zq->queue->lock);
1184                         qdepth[card] =
1185                                 zq->queue->pendingq_count +
1186                                 zq->queue->requestq_count;
1187                         spin_unlock(&zq->queue->lock);
1188                 }
1189         }
1190         local_bh_enable();
1191         spin_unlock(&zcrypt_list_lock);
1192 }
1193
1194 static void zcrypt_perdev_reqcnt(int reqcnt[], size_t max_adapters)
1195 {
1196         struct zcrypt_card *zc;
1197         struct zcrypt_queue *zq;
1198         int card;
1199
1200         memset(reqcnt, 0, sizeof(int) * max_adapters);
1201         spin_lock(&zcrypt_list_lock);
1202         local_bh_disable();
1203         for_each_zcrypt_card(zc) {
1204                 for_each_zcrypt_queue(zq, zc) {
1205                         card = AP_QID_CARD(zq->queue->qid);
1206                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1207                             || card >= max_adapters)
1208                                 continue;
1209                         spin_lock(&zq->queue->lock);
1210                         reqcnt[card] = zq->queue->total_request_count;
1211                         spin_unlock(&zq->queue->lock);
1212                 }
1213         }
1214         local_bh_enable();
1215         spin_unlock(&zcrypt_list_lock);
1216 }
1217
1218 static int zcrypt_pendingq_count(void)
1219 {
1220         struct zcrypt_card *zc;
1221         struct zcrypt_queue *zq;
1222         int pendingq_count;
1223
1224         pendingq_count = 0;
1225         spin_lock(&zcrypt_list_lock);
1226         local_bh_disable();
1227         for_each_zcrypt_card(zc) {
1228                 for_each_zcrypt_queue(zq, zc) {
1229                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1230                                 continue;
1231                         spin_lock(&zq->queue->lock);
1232                         pendingq_count += zq->queue->pendingq_count;
1233                         spin_unlock(&zq->queue->lock);
1234                 }
1235         }
1236         local_bh_enable();
1237         spin_unlock(&zcrypt_list_lock);
1238         return pendingq_count;
1239 }
1240
1241 static int zcrypt_requestq_count(void)
1242 {
1243         struct zcrypt_card *zc;
1244         struct zcrypt_queue *zq;
1245         int requestq_count;
1246
1247         requestq_count = 0;
1248         spin_lock(&zcrypt_list_lock);
1249         local_bh_disable();
1250         for_each_zcrypt_card(zc) {
1251                 for_each_zcrypt_queue(zq, zc) {
1252                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1253                                 continue;
1254                         spin_lock(&zq->queue->lock);
1255                         requestq_count += zq->queue->requestq_count;
1256                         spin_unlock(&zq->queue->lock);
1257                 }
1258         }
1259         local_bh_enable();
1260         spin_unlock(&zcrypt_list_lock);
1261         return requestq_count;
1262 }
1263
1264 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1265                                   unsigned long arg)
1266 {
1267         int rc;
1268         struct ap_perms *perms =
1269                 (struct ap_perms *) filp->private_data;
1270
1271         rc = zcrypt_check_ioctl(perms, cmd);
1272         if (rc)
1273                 return rc;
1274
1275         switch (cmd) {
1276         case ICARSAMODEXPO: {
1277                 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1278                 struct ica_rsa_modexpo mex;
1279
1280                 if (copy_from_user(&mex, umex, sizeof(mex)))
1281                         return -EFAULT;
1282                 do {
1283                         rc = zcrypt_rsa_modexpo(perms, &mex);
1284                 } while (rc == -EAGAIN);
1285                 /* on failure: retry once again after a requested rescan */
1286                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1287                         do {
1288                                 rc = zcrypt_rsa_modexpo(perms, &mex);
1289                         } while (rc == -EAGAIN);
1290                 if (rc) {
1291                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1292                         return rc;
1293                 }
1294                 return put_user(mex.outputdatalength, &umex->outputdatalength);
1295         }
1296         case ICARSACRT: {
1297                 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1298                 struct ica_rsa_modexpo_crt crt;
1299
1300                 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1301                         return -EFAULT;
1302                 do {
1303                         rc = zcrypt_rsa_crt(perms, &crt);
1304                 } while (rc == -EAGAIN);
1305                 /* on failure: retry once again after a requested rescan */
1306                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1307                         do {
1308                                 rc = zcrypt_rsa_crt(perms, &crt);
1309                         } while (rc == -EAGAIN);
1310                 if (rc) {
1311                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1312                         return rc;
1313                 }
1314                 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1315         }
1316         case ZSECSENDCPRB: {
1317                 struct ica_xcRB __user *uxcRB = (void __user *) arg;
1318                 struct ica_xcRB xcRB;
1319
1320                 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1321                         return -EFAULT;
1322                 do {
1323                         rc = _zcrypt_send_cprb(perms, &xcRB);
1324                 } while (rc == -EAGAIN);
1325                 /* on failure: retry once again after a requested rescan */
1326                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1327                         do {
1328                                 rc = _zcrypt_send_cprb(perms, &xcRB);
1329                         } while (rc == -EAGAIN);
1330                 if (rc)
1331                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1332                                    rc, xcRB.status);
1333                 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1334                         return -EFAULT;
1335                 return rc;
1336         }
1337         case ZSENDEP11CPRB: {
1338                 struct ep11_urb __user *uxcrb = (void __user *)arg;
1339                 struct ep11_urb xcrb;
1340
1341                 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1342                         return -EFAULT;
1343                 do {
1344                         rc = zcrypt_send_ep11_cprb(perms, &xcrb);
1345                 } while (rc == -EAGAIN);
1346                 /* on failure: retry once again after a requested rescan */
1347                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1348                         do {
1349                                 rc = zcrypt_send_ep11_cprb(perms, &xcrb);
1350                         } while (rc == -EAGAIN);
1351                 if (rc)
1352                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1353                 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1354                         return -EFAULT;
1355                 return rc;
1356         }
1357         case ZCRYPT_DEVICE_STATUS: {
1358                 struct zcrypt_device_status_ext *device_status;
1359                 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1360                         * sizeof(struct zcrypt_device_status_ext);
1361
1362                 device_status = kzalloc(total_size, GFP_KERNEL);
1363                 if (!device_status)
1364                         return -ENOMEM;
1365                 zcrypt_device_status_mask_ext(device_status);
1366                 if (copy_to_user((char __user *) arg, device_status,
1367                                  total_size))
1368                         rc = -EFAULT;
1369                 kfree(device_status);
1370                 return rc;
1371         }
1372         case ZCRYPT_STATUS_MASK: {
1373                 char status[AP_DEVICES];
1374
1375                 zcrypt_status_mask(status, AP_DEVICES);
1376                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1377                         return -EFAULT;
1378                 return 0;
1379         }
1380         case ZCRYPT_QDEPTH_MASK: {
1381                 char qdepth[AP_DEVICES];
1382
1383                 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1384                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1385                         return -EFAULT;
1386                 return 0;
1387         }
1388         case ZCRYPT_PERDEV_REQCNT: {
1389                 int *reqcnt;
1390
1391                 reqcnt = kcalloc(AP_DEVICES, sizeof(int), GFP_KERNEL);
1392                 if (!reqcnt)
1393                         return -ENOMEM;
1394                 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1395                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1396                         rc = -EFAULT;
1397                 kfree(reqcnt);
1398                 return rc;
1399         }
1400         case Z90STAT_REQUESTQ_COUNT:
1401                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1402         case Z90STAT_PENDINGQ_COUNT:
1403                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1404         case Z90STAT_TOTALOPEN_COUNT:
1405                 return put_user(atomic_read(&zcrypt_open_count),
1406                                 (int __user *) arg);
1407         case Z90STAT_DOMAIN_INDEX:
1408                 return put_user(ap_domain_index, (int __user *) arg);
1409         /*
1410          * Deprecated ioctls
1411          */
1412         case ZDEVICESTATUS: {
1413                 /* the old ioctl supports only 64 adapters */
1414                 struct zcrypt_device_status *device_status;
1415                 size_t total_size = MAX_ZDEV_ENTRIES
1416                         * sizeof(struct zcrypt_device_status);
1417
1418                 device_status = kzalloc(total_size, GFP_KERNEL);
1419                 if (!device_status)
1420                         return -ENOMEM;
1421                 zcrypt_device_status_mask(device_status);
1422                 if (copy_to_user((char __user *) arg, device_status,
1423                                  total_size))
1424                         rc = -EFAULT;
1425                 kfree(device_status);
1426                 return rc;
1427         }
1428         case Z90STAT_STATUS_MASK: {
1429                 /* the old ioctl supports only 64 adapters */
1430                 char status[MAX_ZDEV_CARDIDS];
1431
1432                 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1433                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1434                         return -EFAULT;
1435                 return 0;
1436         }
1437         case Z90STAT_QDEPTH_MASK: {
1438                 /* the old ioctl supports only 64 adapters */
1439                 char qdepth[MAX_ZDEV_CARDIDS];
1440
1441                 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1442                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1443                         return -EFAULT;
1444                 return 0;
1445         }
1446         case Z90STAT_PERDEV_REQCNT: {
1447                 /* the old ioctl supports only 64 adapters */
1448                 int reqcnt[MAX_ZDEV_CARDIDS];
1449
1450                 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1451                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1452                         return -EFAULT;
1453                 return 0;
1454         }
1455         /* unknown ioctl number */
1456         default:
1457                 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1458                 return -ENOIOCTLCMD;
1459         }
1460 }
1461
1462 #ifdef CONFIG_COMPAT
1463 /*
1464  * ioctl32 conversion routines
1465  */
1466 struct compat_ica_rsa_modexpo {
1467         compat_uptr_t   inputdata;
1468         unsigned int    inputdatalength;
1469         compat_uptr_t   outputdata;
1470         unsigned int    outputdatalength;
1471         compat_uptr_t   b_key;
1472         compat_uptr_t   n_modulus;
1473 };
1474
1475 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1476                             unsigned int cmd, unsigned long arg)
1477 {
1478         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1479         struct compat_ica_rsa_modexpo mex32;
1480         struct ica_rsa_modexpo mex64;
1481         long rc;
1482
1483         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1484                 return -EFAULT;
1485         mex64.inputdata = compat_ptr(mex32.inputdata);
1486         mex64.inputdatalength = mex32.inputdatalength;
1487         mex64.outputdata = compat_ptr(mex32.outputdata);
1488         mex64.outputdatalength = mex32.outputdatalength;
1489         mex64.b_key = compat_ptr(mex32.b_key);
1490         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1491         do {
1492                 rc = zcrypt_rsa_modexpo(perms, &mex64);
1493         } while (rc == -EAGAIN);
1494         /* on failure: retry once again after a requested rescan */
1495         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1496                 do {
1497                         rc = zcrypt_rsa_modexpo(perms, &mex64);
1498                 } while (rc == -EAGAIN);
1499         if (rc)
1500                 return rc;
1501         return put_user(mex64.outputdatalength,
1502                         &umex32->outputdatalength);
1503 }
1504
1505 struct compat_ica_rsa_modexpo_crt {
1506         compat_uptr_t   inputdata;
1507         unsigned int    inputdatalength;
1508         compat_uptr_t   outputdata;
1509         unsigned int    outputdatalength;
1510         compat_uptr_t   bp_key;
1511         compat_uptr_t   bq_key;
1512         compat_uptr_t   np_prime;
1513         compat_uptr_t   nq_prime;
1514         compat_uptr_t   u_mult_inv;
1515 };
1516
1517 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1518                                 unsigned int cmd, unsigned long arg)
1519 {
1520         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1521         struct compat_ica_rsa_modexpo_crt crt32;
1522         struct ica_rsa_modexpo_crt crt64;
1523         long rc;
1524
1525         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1526                 return -EFAULT;
1527         crt64.inputdata = compat_ptr(crt32.inputdata);
1528         crt64.inputdatalength = crt32.inputdatalength;
1529         crt64.outputdata = compat_ptr(crt32.outputdata);
1530         crt64.outputdatalength = crt32.outputdatalength;
1531         crt64.bp_key = compat_ptr(crt32.bp_key);
1532         crt64.bq_key = compat_ptr(crt32.bq_key);
1533         crt64.np_prime = compat_ptr(crt32.np_prime);
1534         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1535         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1536         do {
1537                 rc = zcrypt_rsa_crt(perms, &crt64);
1538         } while (rc == -EAGAIN);
1539         /* on failure: retry once again after a requested rescan */
1540         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1541                 do {
1542                         rc = zcrypt_rsa_crt(perms, &crt64);
1543                 } while (rc == -EAGAIN);
1544         if (rc)
1545                 return rc;
1546         return put_user(crt64.outputdatalength,
1547                         &ucrt32->outputdatalength);
1548 }
1549
1550 struct compat_ica_xcRB {
1551         unsigned short  agent_ID;
1552         unsigned int    user_defined;
1553         unsigned short  request_ID;
1554         unsigned int    request_control_blk_length;
1555         unsigned char   padding1[16 - sizeof(compat_uptr_t)];
1556         compat_uptr_t   request_control_blk_addr;
1557         unsigned int    request_data_length;
1558         char            padding2[16 - sizeof(compat_uptr_t)];
1559         compat_uptr_t   request_data_address;
1560         unsigned int    reply_control_blk_length;
1561         char            padding3[16 - sizeof(compat_uptr_t)];
1562         compat_uptr_t   reply_control_blk_addr;
1563         unsigned int    reply_data_length;
1564         char            padding4[16 - sizeof(compat_uptr_t)];
1565         compat_uptr_t   reply_data_addr;
1566         unsigned short  priority_window;
1567         unsigned int    status;
1568 } __packed;
1569
1570 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1571                          unsigned int cmd, unsigned long arg)
1572 {
1573         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1574         struct compat_ica_xcRB xcRB32;
1575         struct ica_xcRB xcRB64;
1576         long rc;
1577
1578         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1579                 return -EFAULT;
1580         xcRB64.agent_ID = xcRB32.agent_ID;
1581         xcRB64.user_defined = xcRB32.user_defined;
1582         xcRB64.request_ID = xcRB32.request_ID;
1583         xcRB64.request_control_blk_length =
1584                 xcRB32.request_control_blk_length;
1585         xcRB64.request_control_blk_addr =
1586                 compat_ptr(xcRB32.request_control_blk_addr);
1587         xcRB64.request_data_length =
1588                 xcRB32.request_data_length;
1589         xcRB64.request_data_address =
1590                 compat_ptr(xcRB32.request_data_address);
1591         xcRB64.reply_control_blk_length =
1592                 xcRB32.reply_control_blk_length;
1593         xcRB64.reply_control_blk_addr =
1594                 compat_ptr(xcRB32.reply_control_blk_addr);
1595         xcRB64.reply_data_length = xcRB32.reply_data_length;
1596         xcRB64.reply_data_addr =
1597                 compat_ptr(xcRB32.reply_data_addr);
1598         xcRB64.priority_window = xcRB32.priority_window;
1599         xcRB64.status = xcRB32.status;
1600         do {
1601                 rc = _zcrypt_send_cprb(perms, &xcRB64);
1602         } while (rc == -EAGAIN);
1603         /* on failure: retry once again after a requested rescan */
1604         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1605                 do {
1606                         rc = _zcrypt_send_cprb(perms, &xcRB64);
1607                 } while (rc == -EAGAIN);
1608         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1609         xcRB32.reply_data_length = xcRB64.reply_data_length;
1610         xcRB32.status = xcRB64.status;
1611         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1612                 return -EFAULT;
1613         return rc;
1614 }
1615
1616 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1617                          unsigned long arg)
1618 {
1619         int rc;
1620         struct ap_perms *perms =
1621                 (struct ap_perms *) filp->private_data;
1622
1623         rc = zcrypt_check_ioctl(perms, cmd);
1624         if (rc)
1625                 return rc;
1626
1627         if (cmd == ICARSAMODEXPO)
1628                 return trans_modexpo32(perms, filp, cmd, arg);
1629         if (cmd == ICARSACRT)
1630                 return trans_modexpo_crt32(perms, filp, cmd, arg);
1631         if (cmd == ZSECSENDCPRB)
1632                 return trans_xcRB32(perms, filp, cmd, arg);
1633         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1634 }
1635 #endif
1636
1637 /*
1638  * Misc device file operations.
1639  */
1640 static const struct file_operations zcrypt_fops = {
1641         .owner          = THIS_MODULE,
1642         .read           = zcrypt_read,
1643         .write          = zcrypt_write,
1644         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1645 #ifdef CONFIG_COMPAT
1646         .compat_ioctl   = zcrypt_compat_ioctl,
1647 #endif
1648         .open           = zcrypt_open,
1649         .release        = zcrypt_release,
1650         .llseek         = no_llseek,
1651 };
1652
1653 /*
1654  * Misc device.
1655  */
1656 static struct miscdevice zcrypt_misc_device = {
1657         .minor      = MISC_DYNAMIC_MINOR,
1658         .name       = "z90crypt",
1659         .fops       = &zcrypt_fops,
1660 };
1661
1662 static int zcrypt_rng_device_count;
1663 static u32 *zcrypt_rng_buffer;
1664 static int zcrypt_rng_buffer_index;
1665 static DEFINE_MUTEX(zcrypt_rng_mutex);
1666
1667 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1668 {
1669         int rc;
1670
1671         /*
1672          * We don't need locking here because the RNG API guarantees serialized
1673          * read method calls.
1674          */
1675         if (zcrypt_rng_buffer_index == 0) {
1676                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1677                 /* on failure: retry once again after a requested rescan */
1678                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1679                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1680                 if (rc < 0)
1681                         return -EIO;
1682                 zcrypt_rng_buffer_index = rc / sizeof(*data);
1683         }
1684         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1685         return sizeof(*data);
1686 }
1687
1688 static struct hwrng zcrypt_rng_dev = {
1689         .name           = "zcrypt",
1690         .data_read      = zcrypt_rng_data_read,
1691         .quality        = 990,
1692 };
1693
1694 int zcrypt_rng_device_add(void)
1695 {
1696         int rc = 0;
1697
1698         mutex_lock(&zcrypt_rng_mutex);
1699         if (zcrypt_rng_device_count == 0) {
1700                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1701                 if (!zcrypt_rng_buffer) {
1702                         rc = -ENOMEM;
1703                         goto out;
1704                 }
1705                 zcrypt_rng_buffer_index = 0;
1706                 if (!zcrypt_hwrng_seed)
1707                         zcrypt_rng_dev.quality = 0;
1708                 rc = hwrng_register(&zcrypt_rng_dev);
1709                 if (rc)
1710                         goto out_free;
1711                 zcrypt_rng_device_count = 1;
1712         } else
1713                 zcrypt_rng_device_count++;
1714         mutex_unlock(&zcrypt_rng_mutex);
1715         return 0;
1716
1717 out_free:
1718         free_page((unsigned long) zcrypt_rng_buffer);
1719 out:
1720         mutex_unlock(&zcrypt_rng_mutex);
1721         return rc;
1722 }
1723
1724 void zcrypt_rng_device_remove(void)
1725 {
1726         mutex_lock(&zcrypt_rng_mutex);
1727         zcrypt_rng_device_count--;
1728         if (zcrypt_rng_device_count == 0) {
1729                 hwrng_unregister(&zcrypt_rng_dev);
1730                 free_page((unsigned long) zcrypt_rng_buffer);
1731         }
1732         mutex_unlock(&zcrypt_rng_mutex);
1733 }
1734
1735 int __init zcrypt_debug_init(void)
1736 {
1737         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1738                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
1739         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1740         debug_set_level(zcrypt_dbf_info, DBF_ERR);
1741
1742         return 0;
1743 }
1744
1745 void zcrypt_debug_exit(void)
1746 {
1747         debug_unregister(zcrypt_dbf_info);
1748 }
1749
1750 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1751
1752 static int __init zcdn_init(void)
1753 {
1754         int rc;
1755
1756         /* create a new class 'zcrypt' */
1757         zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
1758         if (IS_ERR(zcrypt_class)) {
1759                 rc = PTR_ERR(zcrypt_class);
1760                 goto out_class_create_failed;
1761         }
1762         zcrypt_class->dev_release = zcdn_device_release;
1763
1764         /* alloc device minor range */
1765         rc = alloc_chrdev_region(&zcrypt_devt,
1766                                  0, ZCRYPT_MAX_MINOR_NODES,
1767                                  ZCRYPT_NAME);
1768         if (rc)
1769                 goto out_alloc_chrdev_failed;
1770
1771         cdev_init(&zcrypt_cdev, &zcrypt_fops);
1772         zcrypt_cdev.owner = THIS_MODULE;
1773         rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1774         if (rc)
1775                 goto out_cdev_add_failed;
1776
1777         /* need some class specific sysfs attributes */
1778         rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
1779         if (rc)
1780                 goto out_class_create_file_1_failed;
1781         rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
1782         if (rc)
1783                 goto out_class_create_file_2_failed;
1784
1785         return 0;
1786
1787 out_class_create_file_2_failed:
1788         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1789 out_class_create_file_1_failed:
1790         cdev_del(&zcrypt_cdev);
1791 out_cdev_add_failed:
1792         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1793 out_alloc_chrdev_failed:
1794         class_destroy(zcrypt_class);
1795 out_class_create_failed:
1796         return rc;
1797 }
1798
1799 static void zcdn_exit(void)
1800 {
1801         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1802         class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
1803         zcdn_destroy_all();
1804         cdev_del(&zcrypt_cdev);
1805         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1806         class_destroy(zcrypt_class);
1807 }
1808
1809 #endif
1810
1811 /**
1812  * zcrypt_api_init(): Module initialization.
1813  *
1814  * The module initialization code.
1815  */
1816 int __init zcrypt_api_init(void)
1817 {
1818         int rc;
1819
1820         rc = zcrypt_debug_init();
1821         if (rc)
1822                 goto out;
1823
1824 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1825         rc = zcdn_init();
1826         if (rc)
1827                 goto out;
1828 #endif
1829
1830         /* Register the request sprayer. */
1831         rc = misc_register(&zcrypt_misc_device);
1832         if (rc < 0)
1833                 goto out_misc_register_failed;
1834
1835         zcrypt_msgtype6_init();
1836         zcrypt_msgtype50_init();
1837
1838         return 0;
1839
1840 out_misc_register_failed:
1841 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1842         zcdn_exit();
1843 #endif
1844         zcrypt_debug_exit();
1845 out:
1846         return rc;
1847 }
1848
1849 /**
1850  * zcrypt_api_exit(): Module termination.
1851  *
1852  * The module termination code.
1853  */
1854 void __exit zcrypt_api_exit(void)
1855 {
1856 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1857         zcdn_exit();
1858 #endif
1859         misc_deregister(&zcrypt_misc_device);
1860         zcrypt_msgtype6_exit();
1861         zcrypt_msgtype50_exit();
1862         zcrypt_debug_exit();
1863 }
1864
1865 module_init(zcrypt_api_init);
1866 module_exit(zcrypt_api_exit);