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 stream_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                 mutex_lock(&ap_perms_mutex);
 543                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 544                 mutex_unlock(&ap_perms_mutex);
 545                 if (zcdndev) {
 546                         /* 2 puts here: one for find, one for open */
 547                         put_device(&zcdndev->device);
 548                         put_device(&zcdndev->device);
 549                 }
 550         }
 551 #endif
 552
 553         atomic_dec(&zcrypt_open_count);
 554         return 0;
 555 }
 556
 557 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
 558                                      unsigned int cmd)
 559 {
 560         int rc = -EPERM;
 561         int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
 562
 563         if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
 564                 if (test_bit_inv(ioctlnr, perms->ioctlm))
 565                         rc = 0;
 566         }
 567
 568         if (rc)
 569                 ZCRYPT_DBF(DBF_WARN,
 570                            "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
 571                            ioctlnr, rc);
 572
 573         return rc;
 574 }
 575
 576 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
 577 {
 578         return test_bit_inv(card, perms->apm) ? true : false;
 579 }
 580
 581 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
 582 {
 583         return test_bit_inv(queue, perms->aqm) ? true : false;
 584 }
 585
 586 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
 587                                                      struct zcrypt_queue *zq,
 588                                                      struct module **pmod,
 589                                                      unsigned int weight)
 590 {
 591         if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
 592                 return NULL;
 593         zcrypt_queue_get(zq);
 594         get_device(&zq->queue->ap_dev.device);
 595         atomic_add(weight, &zc->load);
 596         atomic_add(weight, &zq->load);
 597         zq->request_count++;
 598         *pmod = zq->queue->ap_dev.drv->driver.owner;
 599         return zq;
 600 }
 601
 602 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
 603                                      struct zcrypt_queue *zq,
 604                                      struct module *mod,
 605                                      unsigned int weight)
 606 {
 607         zq->request_count--;
 608         atomic_sub(weight, &zc->load);
 609         atomic_sub(weight, &zq->load);
 610         put_device(&zq->queue->ap_dev.device);
 611         zcrypt_queue_put(zq);
 612         module_put(mod);
 613 }
 614
 615 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
 616                                        struct zcrypt_card *pref_zc,
 617                                        unsigned int weight,
 618                                        unsigned int pref_weight)
 619 {
 620         if (!pref_zc)
 621                 return false;
 622         weight += atomic_read(&zc->load);
 623         pref_weight += atomic_read(&pref_zc->load);
 624         if (weight == pref_weight)
 625                 return atomic_read(&zc->card->total_request_count) >
 626                         atomic_read(&pref_zc->card->total_request_count);
 627         return weight > pref_weight;
 628 }
 629
 630 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
 631                                         struct zcrypt_queue *pref_zq,
 632                                         unsigned int weight,
 633                                         unsigned int pref_weight)
 634 {
 635         if (!pref_zq)
 636                 return false;
 637         weight += atomic_read(&zq->load);
 638         pref_weight += atomic_read(&pref_zq->load);
 639         if (weight == pref_weight)
 640                 return zq->queue->total_request_count >
 641                         pref_zq->queue->total_request_count;
 642         return weight > pref_weight;
 643 }
 644
 645 /*
 646  * zcrypt ioctls.
 647  */
 648 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
 649                                struct ica_rsa_modexpo *mex)
 650 {
 651         struct zcrypt_card *zc, *pref_zc;
 652         struct zcrypt_queue *zq, *pref_zq;
 653         unsigned int weight, pref_weight;
 654         unsigned int func_code;
 655         int qid = 0, rc = -ENODEV;
 656         struct module *mod;
 657
 658         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
 659
 660         if (mex->outputdatalength < mex->inputdatalength) {
 661                 func_code = 0;
 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                 func_code = 0;
 746                 rc = -EINVAL;
 747                 goto out;
 748         }
 749
 750         /*
 751          * As long as outputdatalength is big enough, we can set the
 752          * outputdatalength equal to the inputdatalength, since that is the
 753          * number of bytes we will copy in any case
 754          */
 755         crt->outputdatalength = crt->inputdatalength;
 756
 757         rc = get_rsa_crt_fc(crt, &func_code);
 758         if (rc)
 759                 goto out;
 760
 761         pref_zc = NULL;
 762         pref_zq = NULL;
 763         spin_lock(&zcrypt_list_lock);
 764         for_each_zcrypt_card(zc) {
 765                 /* Check for online accelarator and CCA cards */
 766                 if (!zc->online || !(zc->card->functions & 0x18000000))
 767                         continue;
 768                 /* Check for size limits */
 769                 if (zc->min_mod_size > crt->inputdatalength ||
 770                     zc->max_mod_size < crt->inputdatalength)
 771                         continue;
 772                 /* check if device node has admission for this card */
 773                 if (!zcrypt_check_card(perms, zc->card->id))
 774                         continue;
 775                 /* get weight index of the card device  */
 776                 weight = zc->speed_rating[func_code];
 777                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 778                         continue;
 779                 for_each_zcrypt_queue(zq, zc) {
 780                         /* check if device is online and eligible */
 781                         if (!zq->online || !zq->ops->rsa_modexpo_crt)
 782                                 continue;
 783                         /* check if device node has admission for this queue */
 784                         if (!zcrypt_check_queue(perms,
 785                                                 AP_QID_QUEUE(zq->queue->qid)))
 786                                 continue;
 787                         if (zcrypt_queue_compare(zq, pref_zq,
 788                                                  weight, pref_weight))
 789                                 continue;
 790                         pref_zc = zc;
 791                         pref_zq = zq;
 792                         pref_weight = weight;
 793                 }
 794         }
 795         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 796         spin_unlock(&zcrypt_list_lock);
 797
 798         if (!pref_zq) {
 799                 rc = -ENODEV;
 800                 goto out;
 801         }
 802
 803         qid = pref_zq->queue->qid;
 804         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
 805
 806         spin_lock(&zcrypt_list_lock);
 807         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 808         spin_unlock(&zcrypt_list_lock);
 809
 810 out:
 811         trace_s390_zcrypt_rep(crt, func_code, rc,
 812                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 813         return rc;
 814 }
 815
 816 static long _zcrypt_send_cprb(struct ap_perms *perms,
 817                               struct ica_xcRB *xcRB)
 818 {
 819         struct zcrypt_card *zc, *pref_zc;
 820         struct zcrypt_queue *zq, *pref_zq;
 821         struct ap_message ap_msg;
 822         unsigned int weight, pref_weight;
 823         unsigned int func_code;
 824         unsigned short *domain, tdom;
 825         int qid = 0, rc = -ENODEV;
 826         struct module *mod;
 827
 828         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
 829
 830         xcRB->status = 0;
 831         ap_init_message(&ap_msg);
 832         rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
 833         if (rc)
 834                 goto out;
 835
 836         /*
 837          * If a valid target domain is set and this domain is NOT a usage
 838          * domain but a control only domain, use the default domain as target.
 839          */
 840         tdom = *domain;
 841         if (tdom >= 0 && tdom < AP_DOMAINS &&
 842             !ap_test_config_usage_domain(tdom) &&
 843             ap_test_config_ctrl_domain(tdom) &&
 844             ap_domain_index >= 0)
 845                 tdom = ap_domain_index;
 846
 847         pref_zc = NULL;
 848         pref_zq = NULL;
 849         spin_lock(&zcrypt_list_lock);
 850         for_each_zcrypt_card(zc) {
 851                 /* Check for online CCA cards */
 852                 if (!zc->online || !(zc->card->functions & 0x10000000))
 853                         continue;
 854                 /* Check for user selected CCA card */
 855                 if (xcRB->user_defined != AUTOSELECT &&
 856                     xcRB->user_defined != zc->card->id)
 857                         continue;
 858                 /* check if device node has admission for this card */
 859                 if (!zcrypt_check_card(perms, zc->card->id))
 860                         continue;
 861                 /* get weight index of the card device  */
 862                 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 863                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 864                         continue;
 865                 for_each_zcrypt_queue(zq, zc) {
 866                         /* check if device is online and eligible */
 867                         if (!zq->online ||
 868                             !zq->ops->send_cprb ||
 869                             (tdom != (unsigned short) AUTOSELECT &&
 870                              tdom != AP_QID_QUEUE(zq->queue->qid)))
 871                                 continue;
 872                         /* check if device node has admission for this queue */
 873                         if (!zcrypt_check_queue(perms,
 874                                                 AP_QID_QUEUE(zq->queue->qid)))
 875                                 continue;
 876                         if (zcrypt_queue_compare(zq, pref_zq,
 877                                                  weight, pref_weight))
 878                                 continue;
 879                         pref_zc = zc;
 880                         pref_zq = zq;
 881                         pref_weight = weight;
 882                 }
 883         }
 884         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 885         spin_unlock(&zcrypt_list_lock);
 886
 887         if (!pref_zq) {
 888                 rc = -ENODEV;
 889                 goto out;
 890         }
 891
 892         /* in case of auto select, provide the correct domain */
 893         qid = pref_zq->queue->qid;
 894         if (*domain == (unsigned short) AUTOSELECT)
 895                 *domain = AP_QID_QUEUE(qid);
 896
 897         rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
 898
 899         spin_lock(&zcrypt_list_lock);
 900         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 901         spin_unlock(&zcrypt_list_lock);
 902
 903 out:
 904         ap_release_message(&ap_msg);
 905         trace_s390_zcrypt_rep(xcRB, func_code, rc,
 906                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 907         return rc;
 908 }
 909
 910 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
 911 {
 912         return _zcrypt_send_cprb(&ap_perms, xcRB);
 913 }
 914 EXPORT_SYMBOL(zcrypt_send_cprb);
 915
 916 static bool is_desired_ep11_card(unsigned int dev_id,
 917                                  unsigned short target_num,
 918                                  struct ep11_target_dev *targets)
 919 {
 920         while (target_num-- > 0) {
 921                 if (dev_id == targets->ap_id)
 922                         return true;
 923                 targets++;
 924         }
 925         return false;
 926 }
 927
 928 static bool is_desired_ep11_queue(unsigned int dev_qid,
 929                                   unsigned short target_num,
 930                                   struct ep11_target_dev *targets)
 931 {
 932         while (target_num-- > 0) {
 933                 if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
 934                         return true;
 935                 targets++;
 936         }
 937         return false;
 938 }
 939
 940 static long zcrypt_send_ep11_cprb(struct ap_perms *perms,
 941                                   struct ep11_urb *xcrb)
 942 {
 943         struct zcrypt_card *zc, *pref_zc;
 944         struct zcrypt_queue *zq, *pref_zq;
 945         struct ep11_target_dev *targets;
 946         unsigned short target_num;
 947         unsigned int weight, pref_weight;
 948         unsigned int func_code;
 949         struct ap_message ap_msg;
 950         int qid = 0, rc = -ENODEV;
 951         struct module *mod;
 952
 953         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
 954
 955         ap_init_message(&ap_msg);
 956
 957         target_num = (unsigned short) xcrb->targets_num;
 958
 959         /* empty list indicates autoselect (all available targets) */
 960         targets = NULL;
 961         if (target_num != 0) {
 962                 struct ep11_target_dev __user *uptr;
 963
 964                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
 965                 if (!targets) {
 966                         func_code = 0;
 967                         rc = -ENOMEM;
 968                         goto out;
 969                 }
 970
 971                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
 972                 if (copy_from_user(targets, uptr,
 973                                    target_num * sizeof(*targets))) {
 974                         func_code = 0;
 975                         rc = -EFAULT;
 976                         goto out_free;
 977                 }
 978         }
 979
 980         rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
 981         if (rc)
 982                 goto out_free;
 983
 984         pref_zc = NULL;
 985         pref_zq = NULL;
 986         spin_lock(&zcrypt_list_lock);
 987         for_each_zcrypt_card(zc) {
 988                 /* Check for online EP11 cards */
 989                 if (!zc->online || !(zc->card->functions & 0x04000000))
 990                         continue;
 991                 /* Check for user selected EP11 card */
 992                 if (targets &&
 993                     !is_desired_ep11_card(zc->card->id, target_num, targets))
 994                         continue;
 995                 /* check if device node has admission for this card */
 996                 if (!zcrypt_check_card(perms, zc->card->id))
 997                         continue;
 998                 /* get weight index of the card device  */
 999                 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1000                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1001                         continue;
1002                 for_each_zcrypt_queue(zq, zc) {
1003                         /* check if device is online and eligible */
1004                         if (!zq->online ||
1005                             !zq->ops->send_ep11_cprb ||
1006                             (targets &&
1007                              !is_desired_ep11_queue(zq->queue->qid,
1008                                                     target_num, targets)))
1009                                 continue;
1010                         /* check if device node has admission for this queue */
1011                         if (!zcrypt_check_queue(perms,
1012                                                 AP_QID_QUEUE(zq->queue->qid)))
1013                                 continue;
1014                         if (zcrypt_queue_compare(zq, pref_zq,
1015                                                  weight, pref_weight))
1016                                 continue;
1017                         pref_zc = zc;
1018                         pref_zq = zq;
1019                         pref_weight = weight;
1020                 }
1021         }
1022         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1023         spin_unlock(&zcrypt_list_lock);
1024
1025         if (!pref_zq) {
1026                 rc = -ENODEV;
1027                 goto out_free;
1028         }
1029
1030         qid = pref_zq->queue->qid;
1031         rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
1032
1033         spin_lock(&zcrypt_list_lock);
1034         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1035         spin_unlock(&zcrypt_list_lock);
1036
1037 out_free:
1038         kfree(targets);
1039 out:
1040         ap_release_message(&ap_msg);
1041         trace_s390_zcrypt_rep(xcrb, func_code, rc,
1042                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1043         return rc;
1044 }
1045
1046 static long zcrypt_rng(char *buffer)
1047 {
1048         struct zcrypt_card *zc, *pref_zc;
1049         struct zcrypt_queue *zq, *pref_zq;
1050         unsigned int weight, pref_weight;
1051         unsigned int func_code;
1052         struct ap_message ap_msg;
1053         unsigned int domain;
1054         int qid = 0, rc = -ENODEV;
1055         struct module *mod;
1056
1057         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1058
1059         ap_init_message(&ap_msg);
1060         rc = get_rng_fc(&ap_msg, &func_code, &domain);
1061         if (rc)
1062                 goto out;
1063
1064         pref_zc = NULL;
1065         pref_zq = NULL;
1066         spin_lock(&zcrypt_list_lock);
1067         for_each_zcrypt_card(zc) {
1068                 /* Check for online CCA cards */
1069                 if (!zc->online || !(zc->card->functions & 0x10000000))
1070                         continue;
1071                 /* get weight index of the card device  */
1072                 weight = zc->speed_rating[func_code];
1073                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1074                         continue;
1075                 for_each_zcrypt_queue(zq, zc) {
1076                         /* check if device is online and eligible */
1077                         if (!zq->online || !zq->ops->rng)
1078                                 continue;
1079                         if (zcrypt_queue_compare(zq, pref_zq,
1080                                                  weight, pref_weight))
1081                                 continue;
1082                         pref_zc = zc;
1083                         pref_zq = zq;
1084                         pref_weight = weight;
1085                 }
1086         }
1087         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1088         spin_unlock(&zcrypt_list_lock);
1089
1090         if (!pref_zq) {
1091                 rc = -ENODEV;
1092                 goto out;
1093         }
1094
1095         qid = pref_zq->queue->qid;
1096         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1097
1098         spin_lock(&zcrypt_list_lock);
1099         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1100         spin_unlock(&zcrypt_list_lock);
1101
1102 out:
1103         ap_release_message(&ap_msg);
1104         trace_s390_zcrypt_rep(buffer, func_code, rc,
1105                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1106         return rc;
1107 }
1108
1109 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1110 {
1111         struct zcrypt_card *zc;
1112         struct zcrypt_queue *zq;
1113         struct zcrypt_device_status *stat;
1114         int card, queue;
1115
1116         memset(devstatus, 0, MAX_ZDEV_ENTRIES
1117                * sizeof(struct zcrypt_device_status));
1118
1119         spin_lock(&zcrypt_list_lock);
1120         for_each_zcrypt_card(zc) {
1121                 for_each_zcrypt_queue(zq, zc) {
1122                         card = AP_QID_CARD(zq->queue->qid);
1123                         if (card >= MAX_ZDEV_CARDIDS)
1124                                 continue;
1125                         queue = AP_QID_QUEUE(zq->queue->qid);
1126                         stat = &devstatus[card * AP_DOMAINS + queue];
1127                         stat->hwtype = zc->card->ap_dev.device_type;
1128                         stat->functions = zc->card->functions >> 26;
1129                         stat->qid = zq->queue->qid;
1130                         stat->online = zq->online ? 0x01 : 0x00;
1131                 }
1132         }
1133         spin_unlock(&zcrypt_list_lock);
1134 }
1135
1136 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1137 {
1138         struct zcrypt_card *zc;
1139         struct zcrypt_queue *zq;
1140         struct zcrypt_device_status_ext *stat;
1141         int card, queue;
1142
1143         memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1144                * sizeof(struct zcrypt_device_status_ext));
1145
1146         spin_lock(&zcrypt_list_lock);
1147         for_each_zcrypt_card(zc) {
1148                 for_each_zcrypt_queue(zq, zc) {
1149                         card = AP_QID_CARD(zq->queue->qid);
1150                         queue = AP_QID_QUEUE(zq->queue->qid);
1151                         stat = &devstatus[card * AP_DOMAINS + queue];
1152                         stat->hwtype = zc->card->ap_dev.device_type;
1153                         stat->functions = zc->card->functions >> 26;
1154                         stat->qid = zq->queue->qid;
1155                         stat->online = zq->online ? 0x01 : 0x00;
1156                 }
1157         }
1158         spin_unlock(&zcrypt_list_lock);
1159 }
1160 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1161
1162 static void zcrypt_status_mask(char status[], size_t max_adapters)
1163 {
1164         struct zcrypt_card *zc;
1165         struct zcrypt_queue *zq;
1166         int card;
1167
1168         memset(status, 0, max_adapters);
1169         spin_lock(&zcrypt_list_lock);
1170         for_each_zcrypt_card(zc) {
1171                 for_each_zcrypt_queue(zq, zc) {
1172                         card = AP_QID_CARD(zq->queue->qid);
1173                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1174                             || card >= max_adapters)
1175                                 continue;
1176                         status[card] = zc->online ? zc->user_space_type : 0x0d;
1177                 }
1178         }
1179         spin_unlock(&zcrypt_list_lock);
1180 }
1181
1182 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1183 {
1184         struct zcrypt_card *zc;
1185         struct zcrypt_queue *zq;
1186         int card;
1187
1188         memset(qdepth, 0, max_adapters);
1189         spin_lock(&zcrypt_list_lock);
1190         local_bh_disable();
1191         for_each_zcrypt_card(zc) {
1192                 for_each_zcrypt_queue(zq, zc) {
1193                         card = AP_QID_CARD(zq->queue->qid);
1194                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1195                             || card >= max_adapters)
1196                                 continue;
1197                         spin_lock(&zq->queue->lock);
1198                         qdepth[card] =
1199                                 zq->queue->pendingq_count +
1200                                 zq->queue->requestq_count;
1201                         spin_unlock(&zq->queue->lock);
1202                 }
1203         }
1204         local_bh_enable();
1205         spin_unlock(&zcrypt_list_lock);
1206 }
1207
1208 static void zcrypt_perdev_reqcnt(int reqcnt[], size_t max_adapters)
1209 {
1210         struct zcrypt_card *zc;
1211         struct zcrypt_queue *zq;
1212         int card;
1213
1214         memset(reqcnt, 0, sizeof(int) * max_adapters);
1215         spin_lock(&zcrypt_list_lock);
1216         local_bh_disable();
1217         for_each_zcrypt_card(zc) {
1218                 for_each_zcrypt_queue(zq, zc) {
1219                         card = AP_QID_CARD(zq->queue->qid);
1220                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1221                             || card >= max_adapters)
1222                                 continue;
1223                         spin_lock(&zq->queue->lock);
1224                         reqcnt[card] = zq->queue->total_request_count;
1225                         spin_unlock(&zq->queue->lock);
1226                 }
1227         }
1228         local_bh_enable();
1229         spin_unlock(&zcrypt_list_lock);
1230 }
1231
1232 static int zcrypt_pendingq_count(void)
1233 {
1234         struct zcrypt_card *zc;
1235         struct zcrypt_queue *zq;
1236         int pendingq_count;
1237
1238         pendingq_count = 0;
1239         spin_lock(&zcrypt_list_lock);
1240         local_bh_disable();
1241         for_each_zcrypt_card(zc) {
1242                 for_each_zcrypt_queue(zq, zc) {
1243                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1244                                 continue;
1245                         spin_lock(&zq->queue->lock);
1246                         pendingq_count += zq->queue->pendingq_count;
1247                         spin_unlock(&zq->queue->lock);
1248                 }
1249         }
1250         local_bh_enable();
1251         spin_unlock(&zcrypt_list_lock);
1252         return pendingq_count;
1253 }
1254
1255 static int zcrypt_requestq_count(void)
1256 {
1257         struct zcrypt_card *zc;
1258         struct zcrypt_queue *zq;
1259         int requestq_count;
1260
1261         requestq_count = 0;
1262         spin_lock(&zcrypt_list_lock);
1263         local_bh_disable();
1264         for_each_zcrypt_card(zc) {
1265                 for_each_zcrypt_queue(zq, zc) {
1266                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1267                                 continue;
1268                         spin_lock(&zq->queue->lock);
1269                         requestq_count += zq->queue->requestq_count;
1270                         spin_unlock(&zq->queue->lock);
1271                 }
1272         }
1273         local_bh_enable();
1274         spin_unlock(&zcrypt_list_lock);
1275         return requestq_count;
1276 }
1277
1278 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1279                                   unsigned long arg)
1280 {
1281         int rc;
1282         struct ap_perms *perms =
1283                 (struct ap_perms *) filp->private_data;
1284
1285         rc = zcrypt_check_ioctl(perms, cmd);
1286         if (rc)
1287                 return rc;
1288
1289         switch (cmd) {
1290         case ICARSAMODEXPO: {
1291                 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1292                 struct ica_rsa_modexpo mex;
1293
1294                 if (copy_from_user(&mex, umex, sizeof(mex)))
1295                         return -EFAULT;
1296                 do {
1297                         rc = zcrypt_rsa_modexpo(perms, &mex);
1298                 } while (rc == -EAGAIN);
1299                 /* on failure: retry once again after a requested rescan */
1300                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1301                         do {
1302                                 rc = zcrypt_rsa_modexpo(perms, &mex);
1303                         } while (rc == -EAGAIN);
1304                 if (rc) {
1305                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1306                         return rc;
1307                 }
1308                 return put_user(mex.outputdatalength, &umex->outputdatalength);
1309         }
1310         case ICARSACRT: {
1311                 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1312                 struct ica_rsa_modexpo_crt crt;
1313
1314                 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1315                         return -EFAULT;
1316                 do {
1317                         rc = zcrypt_rsa_crt(perms, &crt);
1318                 } while (rc == -EAGAIN);
1319                 /* on failure: retry once again after a requested rescan */
1320                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1321                         do {
1322                                 rc = zcrypt_rsa_crt(perms, &crt);
1323                         } while (rc == -EAGAIN);
1324                 if (rc) {
1325                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1326                         return rc;
1327                 }
1328                 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1329         }
1330         case ZSECSENDCPRB: {
1331                 struct ica_xcRB __user *uxcRB = (void __user *) arg;
1332                 struct ica_xcRB xcRB;
1333
1334                 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1335                         return -EFAULT;
1336                 do {
1337                         rc = _zcrypt_send_cprb(perms, &xcRB);
1338                 } while (rc == -EAGAIN);
1339                 /* on failure: retry once again after a requested rescan */
1340                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1341                         do {
1342                                 rc = _zcrypt_send_cprb(perms, &xcRB);
1343                         } while (rc == -EAGAIN);
1344                 if (rc)
1345                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1346                                    rc, xcRB.status);
1347                 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1348                         return -EFAULT;
1349                 return rc;
1350         }
1351         case ZSENDEP11CPRB: {
1352                 struct ep11_urb __user *uxcrb = (void __user *)arg;
1353                 struct ep11_urb xcrb;
1354
1355                 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1356                         return -EFAULT;
1357                 do {
1358                         rc = zcrypt_send_ep11_cprb(perms, &xcrb);
1359                 } while (rc == -EAGAIN);
1360                 /* on failure: retry once again after a requested rescan */
1361                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1362                         do {
1363                                 rc = zcrypt_send_ep11_cprb(perms, &xcrb);
1364                         } while (rc == -EAGAIN);
1365                 if (rc)
1366                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1367                 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1368                         return -EFAULT;
1369                 return rc;
1370         }
1371         case ZCRYPT_DEVICE_STATUS: {
1372                 struct zcrypt_device_status_ext *device_status;
1373                 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1374                         * sizeof(struct zcrypt_device_status_ext);
1375
1376                 device_status = kzalloc(total_size, GFP_KERNEL);
1377                 if (!device_status)
1378                         return -ENOMEM;
1379                 zcrypt_device_status_mask_ext(device_status);
1380                 if (copy_to_user((char __user *) arg, device_status,
1381                                  total_size))
1382                         rc = -EFAULT;
1383                 kfree(device_status);
1384                 return rc;
1385         }
1386         case ZCRYPT_STATUS_MASK: {
1387                 char status[AP_DEVICES];
1388
1389                 zcrypt_status_mask(status, AP_DEVICES);
1390                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1391                         return -EFAULT;
1392                 return 0;
1393         }
1394         case ZCRYPT_QDEPTH_MASK: {
1395                 char qdepth[AP_DEVICES];
1396
1397                 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1398                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1399                         return -EFAULT;
1400                 return 0;
1401         }
1402         case ZCRYPT_PERDEV_REQCNT: {
1403                 int *reqcnt;
1404
1405                 reqcnt = kcalloc(AP_DEVICES, sizeof(int), GFP_KERNEL);
1406                 if (!reqcnt)
1407                         return -ENOMEM;
1408                 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1409                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1410                         rc = -EFAULT;
1411                 kfree(reqcnt);
1412                 return rc;
1413         }
1414         case Z90STAT_REQUESTQ_COUNT:
1415                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1416         case Z90STAT_PENDINGQ_COUNT:
1417                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1418         case Z90STAT_TOTALOPEN_COUNT:
1419                 return put_user(atomic_read(&zcrypt_open_count),
1420                                 (int __user *) arg);
1421         case Z90STAT_DOMAIN_INDEX:
1422                 return put_user(ap_domain_index, (int __user *) arg);
1423         /*
1424          * Deprecated ioctls
1425          */
1426         case ZDEVICESTATUS: {
1427                 /* the old ioctl supports only 64 adapters */
1428                 struct zcrypt_device_status *device_status;
1429                 size_t total_size = MAX_ZDEV_ENTRIES
1430                         * sizeof(struct zcrypt_device_status);
1431
1432                 device_status = kzalloc(total_size, GFP_KERNEL);
1433                 if (!device_status)
1434                         return -ENOMEM;
1435                 zcrypt_device_status_mask(device_status);
1436                 if (copy_to_user((char __user *) arg, device_status,
1437                                  total_size))
1438                         rc = -EFAULT;
1439                 kfree(device_status);
1440                 return rc;
1441         }
1442         case Z90STAT_STATUS_MASK: {
1443                 /* the old ioctl supports only 64 adapters */
1444                 char status[MAX_ZDEV_CARDIDS];
1445
1446                 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1447                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1448                         return -EFAULT;
1449                 return 0;
1450         }
1451         case Z90STAT_QDEPTH_MASK: {
1452                 /* the old ioctl supports only 64 adapters */
1453                 char qdepth[MAX_ZDEV_CARDIDS];
1454
1455                 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1456                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1457                         return -EFAULT;
1458                 return 0;
1459         }
1460         case Z90STAT_PERDEV_REQCNT: {
1461                 /* the old ioctl supports only 64 adapters */
1462                 int reqcnt[MAX_ZDEV_CARDIDS];
1463
1464                 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1465                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1466                         return -EFAULT;
1467                 return 0;
1468         }
1469         /* unknown ioctl number */
1470         default:
1471                 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1472                 return -ENOIOCTLCMD;
1473         }
1474 }
1475
1476 #ifdef CONFIG_COMPAT
1477 /*
1478  * ioctl32 conversion routines
1479  */
1480 struct compat_ica_rsa_modexpo {
1481         compat_uptr_t   inputdata;
1482         unsigned int    inputdatalength;
1483         compat_uptr_t   outputdata;
1484         unsigned int    outputdatalength;
1485         compat_uptr_t   b_key;
1486         compat_uptr_t   n_modulus;
1487 };
1488
1489 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1490                             unsigned int cmd, unsigned long arg)
1491 {
1492         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1493         struct compat_ica_rsa_modexpo mex32;
1494         struct ica_rsa_modexpo mex64;
1495         long rc;
1496
1497         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1498                 return -EFAULT;
1499         mex64.inputdata = compat_ptr(mex32.inputdata);
1500         mex64.inputdatalength = mex32.inputdatalength;
1501         mex64.outputdata = compat_ptr(mex32.outputdata);
1502         mex64.outputdatalength = mex32.outputdatalength;
1503         mex64.b_key = compat_ptr(mex32.b_key);
1504         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1505         do {
1506                 rc = zcrypt_rsa_modexpo(perms, &mex64);
1507         } while (rc == -EAGAIN);
1508         /* on failure: retry once again after a requested rescan */
1509         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1510                 do {
1511                         rc = zcrypt_rsa_modexpo(perms, &mex64);
1512                 } while (rc == -EAGAIN);
1513         if (rc)
1514                 return rc;
1515         return put_user(mex64.outputdatalength,
1516                         &umex32->outputdatalength);
1517 }
1518
1519 struct compat_ica_rsa_modexpo_crt {
1520         compat_uptr_t   inputdata;
1521         unsigned int    inputdatalength;
1522         compat_uptr_t   outputdata;
1523         unsigned int    outputdatalength;
1524         compat_uptr_t   bp_key;
1525         compat_uptr_t   bq_key;
1526         compat_uptr_t   np_prime;
1527         compat_uptr_t   nq_prime;
1528         compat_uptr_t   u_mult_inv;
1529 };
1530
1531 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1532                                 unsigned int cmd, unsigned long arg)
1533 {
1534         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1535         struct compat_ica_rsa_modexpo_crt crt32;
1536         struct ica_rsa_modexpo_crt crt64;
1537         long rc;
1538
1539         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1540                 return -EFAULT;
1541         crt64.inputdata = compat_ptr(crt32.inputdata);
1542         crt64.inputdatalength = crt32.inputdatalength;
1543         crt64.outputdata = compat_ptr(crt32.outputdata);
1544         crt64.outputdatalength = crt32.outputdatalength;
1545         crt64.bp_key = compat_ptr(crt32.bp_key);
1546         crt64.bq_key = compat_ptr(crt32.bq_key);
1547         crt64.np_prime = compat_ptr(crt32.np_prime);
1548         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1549         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1550         do {
1551                 rc = zcrypt_rsa_crt(perms, &crt64);
1552         } while (rc == -EAGAIN);
1553         /* on failure: retry once again after a requested rescan */
1554         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1555                 do {
1556                         rc = zcrypt_rsa_crt(perms, &crt64);
1557                 } while (rc == -EAGAIN);
1558         if (rc)
1559                 return rc;
1560         return put_user(crt64.outputdatalength,
1561                         &ucrt32->outputdatalength);
1562 }
1563
1564 struct compat_ica_xcRB {
1565         unsigned short  agent_ID;
1566         unsigned int    user_defined;
1567         unsigned short  request_ID;
1568         unsigned int    request_control_blk_length;
1569         unsigned char   padding1[16 - sizeof(compat_uptr_t)];
1570         compat_uptr_t   request_control_blk_addr;
1571         unsigned int    request_data_length;
1572         char            padding2[16 - sizeof(compat_uptr_t)];
1573         compat_uptr_t   request_data_address;
1574         unsigned int    reply_control_blk_length;
1575         char            padding3[16 - sizeof(compat_uptr_t)];
1576         compat_uptr_t   reply_control_blk_addr;
1577         unsigned int    reply_data_length;
1578         char            padding4[16 - sizeof(compat_uptr_t)];
1579         compat_uptr_t   reply_data_addr;
1580         unsigned short  priority_window;
1581         unsigned int    status;
1582 } __packed;
1583
1584 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1585                          unsigned int cmd, unsigned long arg)
1586 {
1587         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1588         struct compat_ica_xcRB xcRB32;
1589         struct ica_xcRB xcRB64;
1590         long rc;
1591
1592         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1593                 return -EFAULT;
1594         xcRB64.agent_ID = xcRB32.agent_ID;
1595         xcRB64.user_defined = xcRB32.user_defined;
1596         xcRB64.request_ID = xcRB32.request_ID;
1597         xcRB64.request_control_blk_length =
1598                 xcRB32.request_control_blk_length;
1599         xcRB64.request_control_blk_addr =
1600                 compat_ptr(xcRB32.request_control_blk_addr);
1601         xcRB64.request_data_length =
1602                 xcRB32.request_data_length;
1603         xcRB64.request_data_address =
1604                 compat_ptr(xcRB32.request_data_address);
1605         xcRB64.reply_control_blk_length =
1606                 xcRB32.reply_control_blk_length;
1607         xcRB64.reply_control_blk_addr =
1608                 compat_ptr(xcRB32.reply_control_blk_addr);
1609         xcRB64.reply_data_length = xcRB32.reply_data_length;
1610         xcRB64.reply_data_addr =
1611                 compat_ptr(xcRB32.reply_data_addr);
1612         xcRB64.priority_window = xcRB32.priority_window;
1613         xcRB64.status = xcRB32.status;
1614         do {
1615                 rc = _zcrypt_send_cprb(perms, &xcRB64);
1616         } while (rc == -EAGAIN);
1617         /* on failure: retry once again after a requested rescan */
1618         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1619                 do {
1620                         rc = _zcrypt_send_cprb(perms, &xcRB64);
1621                 } while (rc == -EAGAIN);
1622         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1623         xcRB32.reply_data_length = xcRB64.reply_data_length;
1624         xcRB32.status = xcRB64.status;
1625         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1626                 return -EFAULT;
1627         return rc;
1628 }
1629
1630 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1631                          unsigned long arg)
1632 {
1633         int rc;
1634         struct ap_perms *perms =
1635                 (struct ap_perms *) filp->private_data;
1636
1637         rc = zcrypt_check_ioctl(perms, cmd);
1638         if (rc)
1639                 return rc;
1640
1641         if (cmd == ICARSAMODEXPO)
1642                 return trans_modexpo32(perms, filp, cmd, arg);
1643         if (cmd == ICARSACRT)
1644                 return trans_modexpo_crt32(perms, filp, cmd, arg);
1645         if (cmd == ZSECSENDCPRB)
1646                 return trans_xcRB32(perms, filp, cmd, arg);
1647         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1648 }
1649 #endif
1650
1651 /*
1652  * Misc device file operations.
1653  */
1654 static const struct file_operations zcrypt_fops = {
1655         .owner          = THIS_MODULE,
1656         .read           = zcrypt_read,
1657         .write          = zcrypt_write,
1658         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1659 #ifdef CONFIG_COMPAT
1660         .compat_ioctl   = zcrypt_compat_ioctl,
1661 #endif
1662         .open           = zcrypt_open,
1663         .release        = zcrypt_release,
1664         .llseek         = no_llseek,
1665 };
1666
1667 /*
1668  * Misc device.
1669  */
1670 static struct miscdevice zcrypt_misc_device = {
1671         .minor      = MISC_DYNAMIC_MINOR,
1672         .name       = "z90crypt",
1673         .fops       = &zcrypt_fops,
1674 };
1675
1676 static int zcrypt_rng_device_count;
1677 static u32 *zcrypt_rng_buffer;
1678 static int zcrypt_rng_buffer_index;
1679 static DEFINE_MUTEX(zcrypt_rng_mutex);
1680
1681 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1682 {
1683         int rc;
1684
1685         /*
1686          * We don't need locking here because the RNG API guarantees serialized
1687          * read method calls.
1688          */
1689         if (zcrypt_rng_buffer_index == 0) {
1690                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1691                 /* on failure: retry once again after a requested rescan */
1692                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1693                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1694                 if (rc < 0)
1695                         return -EIO;
1696                 zcrypt_rng_buffer_index = rc / sizeof(*data);
1697         }
1698         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1699         return sizeof(*data);
1700 }
1701
1702 static struct hwrng zcrypt_rng_dev = {
1703         .name           = "zcrypt",
1704         .data_read      = zcrypt_rng_data_read,
1705         .quality        = 990,
1706 };
1707
1708 int zcrypt_rng_device_add(void)
1709 {
1710         int rc = 0;
1711
1712         mutex_lock(&zcrypt_rng_mutex);
1713         if (zcrypt_rng_device_count == 0) {
1714                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1715                 if (!zcrypt_rng_buffer) {
1716                         rc = -ENOMEM;
1717                         goto out;
1718                 }
1719                 zcrypt_rng_buffer_index = 0;
1720                 if (!zcrypt_hwrng_seed)
1721                         zcrypt_rng_dev.quality = 0;
1722                 rc = hwrng_register(&zcrypt_rng_dev);
1723                 if (rc)
1724                         goto out_free;
1725                 zcrypt_rng_device_count = 1;
1726         } else
1727                 zcrypt_rng_device_count++;
1728         mutex_unlock(&zcrypt_rng_mutex);
1729         return 0;
1730
1731 out_free:
1732         free_page((unsigned long) zcrypt_rng_buffer);
1733 out:
1734         mutex_unlock(&zcrypt_rng_mutex);
1735         return rc;
1736 }
1737
1738 void zcrypt_rng_device_remove(void)
1739 {
1740         mutex_lock(&zcrypt_rng_mutex);
1741         zcrypt_rng_device_count--;
1742         if (zcrypt_rng_device_count == 0) {
1743                 hwrng_unregister(&zcrypt_rng_dev);
1744                 free_page((unsigned long) zcrypt_rng_buffer);
1745         }
1746         mutex_unlock(&zcrypt_rng_mutex);
1747 }
1748
1749 int __init zcrypt_debug_init(void)
1750 {
1751         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1752                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
1753         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1754         debug_set_level(zcrypt_dbf_info, DBF_ERR);
1755
1756         return 0;
1757 }
1758
1759 void zcrypt_debug_exit(void)
1760 {
1761         debug_unregister(zcrypt_dbf_info);
1762 }
1763
1764 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1765
1766 static int __init zcdn_init(void)
1767 {
1768         int rc;
1769
1770         /* create a new class 'zcrypt' */
1771         zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
1772         if (IS_ERR(zcrypt_class)) {
1773                 rc = PTR_ERR(zcrypt_class);
1774                 goto out_class_create_failed;
1775         }
1776         zcrypt_class->dev_release = zcdn_device_release;
1777
1778         /* alloc device minor range */
1779         rc = alloc_chrdev_region(&zcrypt_devt,
1780                                  0, ZCRYPT_MAX_MINOR_NODES,
1781                                  ZCRYPT_NAME);
1782         if (rc)
1783                 goto out_alloc_chrdev_failed;
1784
1785         cdev_init(&zcrypt_cdev, &zcrypt_fops);
1786         zcrypt_cdev.owner = THIS_MODULE;
1787         rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1788         if (rc)
1789                 goto out_cdev_add_failed;
1790
1791         /* need some class specific sysfs attributes */
1792         rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
1793         if (rc)
1794                 goto out_class_create_file_1_failed;
1795         rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
1796         if (rc)
1797                 goto out_class_create_file_2_failed;
1798
1799         return 0;
1800
1801 out_class_create_file_2_failed:
1802         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1803 out_class_create_file_1_failed:
1804         cdev_del(&zcrypt_cdev);
1805 out_cdev_add_failed:
1806         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1807 out_alloc_chrdev_failed:
1808         class_destroy(zcrypt_class);
1809 out_class_create_failed:
1810         return rc;
1811 }
1812
1813 static void zcdn_exit(void)
1814 {
1815         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1816         class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
1817         zcdn_destroy_all();
1818         cdev_del(&zcrypt_cdev);
1819         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1820         class_destroy(zcrypt_class);
1821 }
1822
1823 #endif
1824
1825 /**
1826  * zcrypt_api_init(): Module initialization.
1827  *
1828  * The module initialization code.
1829  */
1830 int __init zcrypt_api_init(void)
1831 {
1832         int rc;
1833
1834         rc = zcrypt_debug_init();
1835         if (rc)
1836                 goto out;
1837
1838 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1839         rc = zcdn_init();
1840         if (rc)
1841                 goto out;
1842 #endif
1843
1844         /* Register the request sprayer. */
1845         rc = misc_register(&zcrypt_misc_device);
1846         if (rc < 0)
1847                 goto out_misc_register_failed;
1848
1849         zcrypt_msgtype6_init();
1850         zcrypt_msgtype50_init();
1851
1852         return 0;
1853
1854 out_misc_register_failed:
1855 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1856         zcdn_exit();
1857 #endif
1858         zcrypt_debug_exit();
1859 out:
1860         return rc;
1861 }
1862
1863 /**
1864  * zcrypt_api_exit(): Module termination.
1865  *
1866  * The module termination code.
1867  */
1868 void __exit zcrypt_api_exit(void)
1869 {
1870 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1871         zcdn_exit();
1872 #endif
1873         misc_deregister(&zcrypt_misc_device);
1874         zcrypt_msgtype6_exit();
1875         zcrypt_msgtype50_exit();
1876         zcrypt_debug_exit();
1877 }
1878
1879 module_init(zcrypt_api_init);
1880 module_exit(zcrypt_api_exit);