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 devt value for find_zcdndev_by_devt() */
 137 static int __match_zcdn_devt(struct device *dev, const void *data)
 138 {
 139         return dev->devt == *((dev_t *) data);
 140 }
 141
 142 /*
 143  * Find zcdn device by name.
 144  * Returns reference to the zcdn device which needs to be released
 145  * with put_device() after use.
 146  */
 147 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
 148 {
 149         struct device *dev = class_find_device_by_name(zcrypt_class, name);
 150
 151         return dev ? to_zcdn_dev(dev) : NULL;
 152 }
 153
 154 /*
 155  * Find zcdn device by devt value.
 156  * Returns reference to the zcdn device which needs to be released
 157  * with put_device() after use.
 158  */
 159 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
 160 {
 161         struct device *dev =
 162                 class_find_device(zcrypt_class, NULL,
 163                                   (void *) &devt,
 164                                   __match_zcdn_devt);
 165
 166         return dev ? to_zcdn_dev(dev) : NULL;
 167 }
 168
 169 static ssize_t ioctlmask_show(struct device *dev,
 170                               struct device_attribute *attr,
 171                               char *buf)
 172 {
 173         int i, rc;
 174         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 175
 176         if (mutex_lock_interruptible(&ap_perms_mutex))
 177                 return -ERESTARTSYS;
 178
 179         buf[0] = '0';
 180         buf[1] = 'x';
 181         for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
 182                 snprintf(buf + 2 + 2 * i * sizeof(long),
 183                          PAGE_SIZE - 2 - 2 * i * sizeof(long),
 184                          "%016lx", zcdndev->perms.ioctlm[i]);
 185         buf[2 + 2 * i * sizeof(long)] = '\n';
 186         buf[2 + 2 * i * sizeof(long) + 1] = '\0';
 187         rc = 2 + 2 * i * sizeof(long) + 1;
 188
 189         mutex_unlock(&ap_perms_mutex);
 190
 191         return rc;
 192 }
 193
 194 static ssize_t ioctlmask_store(struct device *dev,
 195                                struct device_attribute *attr,
 196                                const char *buf, size_t count)
 197 {
 198         int rc;
 199         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 200
 201         rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
 202                                AP_IOCTLS, &ap_perms_mutex);
 203         if (rc)
 204                 return rc;
 205
 206         return count;
 207 }
 208
 209 static DEVICE_ATTR_RW(ioctlmask);
 210
 211 static ssize_t apmask_show(struct device *dev,
 212                            struct device_attribute *attr,
 213                            char *buf)
 214 {
 215         int i, rc;
 216         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 217
 218         if (mutex_lock_interruptible(&ap_perms_mutex))
 219                 return -ERESTARTSYS;
 220
 221         buf[0] = '0';
 222         buf[1] = 'x';
 223         for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
 224                 snprintf(buf + 2 + 2 * i * sizeof(long),
 225                          PAGE_SIZE - 2 - 2 * i * sizeof(long),
 226                          "%016lx", zcdndev->perms.apm[i]);
 227         buf[2 + 2 * i * sizeof(long)] = '\n';
 228         buf[2 + 2 * i * sizeof(long) + 1] = '\0';
 229         rc = 2 + 2 * i * sizeof(long) + 1;
 230
 231         mutex_unlock(&ap_perms_mutex);
 232
 233         return rc;
 234 }
 235
 236 static ssize_t apmask_store(struct device *dev,
 237                             struct device_attribute *attr,
 238                             const char *buf, size_t count)
 239 {
 240         int rc;
 241         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 242
 243         rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
 244                                AP_DEVICES, &ap_perms_mutex);
 245         if (rc)
 246                 return rc;
 247
 248         return count;
 249 }
 250
 251 static DEVICE_ATTR_RW(apmask);
 252
 253 static ssize_t aqmask_show(struct device *dev,
 254                            struct device_attribute *attr,
 255                            char *buf)
 256 {
 257         int i, rc;
 258         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 259
 260         if (mutex_lock_interruptible(&ap_perms_mutex))
 261                 return -ERESTARTSYS;
 262
 263         buf[0] = '0';
 264         buf[1] = 'x';
 265         for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
 266                 snprintf(buf + 2 + 2 * i * sizeof(long),
 267                          PAGE_SIZE - 2 - 2 * i * sizeof(long),
 268                          "%016lx", zcdndev->perms.aqm[i]);
 269         buf[2 + 2 * i * sizeof(long)] = '\n';
 270         buf[2 + 2 * i * sizeof(long) + 1] = '\0';
 271         rc = 2 + 2 * i * sizeof(long) + 1;
 272
 273         mutex_unlock(&ap_perms_mutex);
 274
 275         return rc;
 276 }
 277
 278 static ssize_t aqmask_store(struct device *dev,
 279                             struct device_attribute *attr,
 280                             const char *buf, size_t count)
 281 {
 282         int rc;
 283         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 284
 285         rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
 286                                AP_DOMAINS, &ap_perms_mutex);
 287         if (rc)
 288                 return rc;
 289
 290         return count;
 291 }
 292
 293 static DEVICE_ATTR_RW(aqmask);
 294
 295 static struct attribute *zcdn_dev_attrs[] = {
 296         &dev_attr_ioctlmask.attr,
 297         &dev_attr_apmask.attr,
 298         &dev_attr_aqmask.attr,
 299         NULL
 300 };
 301
 302 static struct attribute_group zcdn_dev_attr_group = {
 303         .attrs = zcdn_dev_attrs
 304 };
 305
 306 static const struct attribute_group *zcdn_dev_attr_groups[] = {
 307         &zcdn_dev_attr_group,
 308         NULL
 309 };
 310
 311 static ssize_t zcdn_create_store(struct class *class,
 312                                  struct class_attribute *attr,
 313                                  const char *buf, size_t count)
 314 {
 315         int rc;
 316         char name[ZCDN_MAX_NAME];
 317
 318         strncpy(name, skip_spaces(buf), sizeof(name));
 319         name[sizeof(name) - 1] = '\0';
 320
 321         rc = zcdn_create(strim(name));
 322
 323         return rc ? rc : count;
 324 }
 325
 326 static const struct class_attribute class_attr_zcdn_create =
 327         __ATTR(create, 0600, NULL, zcdn_create_store);
 328
 329 static ssize_t zcdn_destroy_store(struct class *class,
 330                                   struct class_attribute *attr,
 331                                   const char *buf, size_t count)
 332 {
 333         int rc;
 334         char name[ZCDN_MAX_NAME];
 335
 336         strncpy(name, skip_spaces(buf), sizeof(name));
 337         name[sizeof(name) - 1] = '\0';
 338
 339         rc = zcdn_destroy(strim(name));
 340
 341         return rc ? rc : count;
 342 }
 343
 344 static const struct class_attribute class_attr_zcdn_destroy =
 345         __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
 346
 347 static void zcdn_device_release(struct device *dev)
 348 {
 349         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 350
 351         ZCRYPT_DBF(DBF_INFO, "releasing zcdn device %d:%d\n",
 352                    MAJOR(dev->devt), MINOR(dev->devt));
 353
 354         kfree(zcdndev);
 355 }
 356
 357 static int zcdn_create(const char *name)
 358 {
 359         dev_t devt;
 360         int i, rc = 0;
 361         char nodename[ZCDN_MAX_NAME];
 362         struct zcdn_device *zcdndev;
 363
 364         if (mutex_lock_interruptible(&ap_perms_mutex))
 365                 return -ERESTARTSYS;
 366
 367         /* check if device node with this name already exists */
 368         if (name[0]) {
 369                 zcdndev = find_zcdndev_by_name(name);
 370                 if (zcdndev) {
 371                         put_device(&zcdndev->device);
 372                         rc = -EEXIST;
 373                         goto unlockout;
 374                 }
 375         }
 376
 377         /* find an unused minor number */
 378         for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
 379                 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
 380                 zcdndev = find_zcdndev_by_devt(devt);
 381                 if (zcdndev)
 382                         put_device(&zcdndev->device);
 383                 else
 384                         break;
 385         }
 386         if (i == ZCRYPT_MAX_MINOR_NODES) {
 387                 rc = -ENOSPC;
 388                 goto unlockout;
 389         }
 390
 391         /* alloc and prepare a new zcdn device */
 392         zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
 393         if (!zcdndev) {
 394                 rc = -ENOMEM;
 395                 goto unlockout;
 396         }
 397         zcdndev->device.release = zcdn_device_release;
 398         zcdndev->device.class = zcrypt_class;
 399         zcdndev->device.devt = devt;
 400         zcdndev->device.groups = zcdn_dev_attr_groups;
 401         if (name[0])
 402                 strncpy(nodename, name, sizeof(nodename));
 403         else
 404                 snprintf(nodename, sizeof(nodename),
 405                          ZCRYPT_NAME "_%d", (int) MINOR(devt));
 406         nodename[sizeof(nodename)-1] = '\0';
 407         if (dev_set_name(&zcdndev->device, nodename)) {
 408                 rc = -EINVAL;
 409                 goto unlockout;
 410         }
 411         rc = device_register(&zcdndev->device);
 412         if (rc) {
 413                 put_device(&zcdndev->device);
 414                 goto unlockout;
 415         }
 416
 417         ZCRYPT_DBF(DBF_INFO, "created zcdn device %d:%d\n",
 418                    MAJOR(devt), MINOR(devt));
 419
 420 unlockout:
 421         mutex_unlock(&ap_perms_mutex);
 422         return rc;
 423 }
 424
 425 static int zcdn_destroy(const char *name)
 426 {
 427         int rc = 0;
 428         struct zcdn_device *zcdndev;
 429
 430         if (mutex_lock_interruptible(&ap_perms_mutex))
 431                 return -ERESTARTSYS;
 432
 433         /* try to find this zcdn device */
 434         zcdndev = find_zcdndev_by_name(name);
 435         if (!zcdndev) {
 436                 rc = -ENOENT;
 437                 goto unlockout;
 438         }
 439
 440         /*
 441          * The zcdn device is not hard destroyed. It is subject to
 442          * reference counting and thus just needs to be unregistered.
 443          */
 444         put_device(&zcdndev->device);
 445         device_unregister(&zcdndev->device);
 446
 447 unlockout:
 448         mutex_unlock(&ap_perms_mutex);
 449         return rc;
 450 }
 451
 452 static void zcdn_destroy_all(void)
 453 {
 454         int i;
 455         dev_t devt;
 456         struct zcdn_device *zcdndev;
 457
 458         mutex_lock(&ap_perms_mutex);
 459         for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
 460                 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
 461                 zcdndev = find_zcdndev_by_devt(devt);
 462                 if (zcdndev) {
 463                         put_device(&zcdndev->device);
 464                         device_unregister(&zcdndev->device);
 465                 }
 466         }
 467         mutex_unlock(&ap_perms_mutex);
 468 }
 469
 470 #endif
 471
 472 /**
 473  * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
 474  *
 475  * This function is not supported beyond zcrypt 1.3.1.
 476  */
 477 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
 478                            size_t count, loff_t *f_pos)
 479 {
 480         return -EPERM;
 481 }
 482
 483 /**
 484  * zcrypt_write(): Not allowed.
 485  *
 486  * Write is is not allowed
 487  */
 488 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
 489                             size_t count, loff_t *f_pos)
 490 {
 491         return -EPERM;
 492 }
 493
 494 /**
 495  * zcrypt_open(): Count number of users.
 496  *
 497  * Device open function to count number of users.
 498  */
 499 static int zcrypt_open(struct inode *inode, struct file *filp)
 500 {
 501         struct ap_perms *perms = &ap_perms;
 502
 503 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 504         if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 505                 struct zcdn_device *zcdndev;
 506
 507                 if (mutex_lock_interruptible(&ap_perms_mutex))
 508                         return -ERESTARTSYS;
 509                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 510                 /* find returns a reference, no get_device() needed */
 511                 mutex_unlock(&ap_perms_mutex);
 512                 if (zcdndev)
 513                         perms = &zcdndev->perms;
 514         }
 515 #endif
 516         filp->private_data = (void *) perms;
 517
 518         atomic_inc(&zcrypt_open_count);
 519         return stream_open(inode, filp);
 520 }
 521
 522 /**
 523  * zcrypt_release(): Count number of users.
 524  *
 525  * Device close function to count number of users.
 526  */
 527 static int zcrypt_release(struct inode *inode, struct file *filp)
 528 {
 529 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 530         if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 531                 struct zcdn_device *zcdndev;
 532
 533                 if (mutex_lock_interruptible(&ap_perms_mutex))
 534                         return -ERESTARTSYS;
 535                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 536                 mutex_unlock(&ap_perms_mutex);
 537                 if (zcdndev) {
 538                         /* 2 puts here: one for find, one for open */
 539                         put_device(&zcdndev->device);
 540                         put_device(&zcdndev->device);
 541                 }
 542         }
 543 #endif
 544
 545         atomic_dec(&zcrypt_open_count);
 546         return 0;
 547 }
 548
 549 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
 550                                      unsigned int cmd)
 551 {
 552         int rc = -EPERM;
 553         int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
 554
 555         if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
 556                 if (test_bit_inv(ioctlnr, perms->ioctlm))
 557                         rc = 0;
 558         }
 559
 560         if (rc)
 561                 ZCRYPT_DBF(DBF_WARN,
 562                            "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
 563                            ioctlnr, rc);
 564
 565         return rc;
 566 }
 567
 568 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
 569 {
 570         return test_bit_inv(card, perms->apm) ? true : false;
 571 }
 572
 573 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
 574 {
 575         return test_bit_inv(queue, perms->aqm) ? true : false;
 576 }
 577
 578 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
 579                                                      struct zcrypt_queue *zq,
 580                                                      struct module **pmod,
 581                                                      unsigned int weight)
 582 {
 583         if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
 584                 return NULL;
 585         zcrypt_queue_get(zq);
 586         get_device(&zq->queue->ap_dev.device);
 587         atomic_add(weight, &zc->load);
 588         atomic_add(weight, &zq->load);
 589         zq->request_count++;
 590         *pmod = zq->queue->ap_dev.drv->driver.owner;
 591         return zq;
 592 }
 593
 594 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
 595                                      struct zcrypt_queue *zq,
 596                                      struct module *mod,
 597                                      unsigned int weight)
 598 {
 599         zq->request_count--;
 600         atomic_sub(weight, &zc->load);
 601         atomic_sub(weight, &zq->load);
 602         put_device(&zq->queue->ap_dev.device);
 603         zcrypt_queue_put(zq);
 604         module_put(mod);
 605 }
 606
 607 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
 608                                        struct zcrypt_card *pref_zc,
 609                                        unsigned int weight,
 610                                        unsigned int pref_weight)
 611 {
 612         if (!pref_zc)
 613                 return false;
 614         weight += atomic_read(&zc->load);
 615         pref_weight += atomic_read(&pref_zc->load);
 616         if (weight == pref_weight)
 617                 return atomic_read(&zc->card->total_request_count) >
 618                         atomic_read(&pref_zc->card->total_request_count);
 619         return weight > pref_weight;
 620 }
 621
 622 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
 623                                         struct zcrypt_queue *pref_zq,
 624                                         unsigned int weight,
 625                                         unsigned int pref_weight)
 626 {
 627         if (!pref_zq)
 628                 return false;
 629         weight += atomic_read(&zq->load);
 630         pref_weight += atomic_read(&pref_zq->load);
 631         if (weight == pref_weight)
 632                 return zq->queue->total_request_count >
 633                         pref_zq->queue->total_request_count;
 634         return weight > pref_weight;
 635 }
 636
 637 /*
 638  * zcrypt ioctls.
 639  */
 640 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
 641                                struct ica_rsa_modexpo *mex)
 642 {
 643         struct zcrypt_card *zc, *pref_zc;
 644         struct zcrypt_queue *zq, *pref_zq;
 645         unsigned int weight, pref_weight;
 646         unsigned int func_code;
 647         int qid = 0, rc = -ENODEV;
 648         struct module *mod;
 649
 650         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
 651
 652         if (mex->outputdatalength < mex->inputdatalength) {
 653                 func_code = 0;
 654                 rc = -EINVAL;
 655                 goto out;
 656         }
 657
 658         /*
 659          * As long as outputdatalength is big enough, we can set the
 660          * outputdatalength equal to the inputdatalength, since that is the
 661          * number of bytes we will copy in any case
 662          */
 663         mex->outputdatalength = mex->inputdatalength;
 664
 665         rc = get_rsa_modex_fc(mex, &func_code);
 666         if (rc)
 667                 goto out;
 668
 669         pref_zc = NULL;
 670         pref_zq = NULL;
 671         spin_lock(&zcrypt_list_lock);
 672         for_each_zcrypt_card(zc) {
 673                 /* Check for online accelarator and CCA cards */
 674                 if (!zc->online || !(zc->card->functions & 0x18000000))
 675                         continue;
 676                 /* Check for size limits */
 677                 if (zc->min_mod_size > mex->inputdatalength ||
 678                     zc->max_mod_size < mex->inputdatalength)
 679                         continue;
 680                 /* check if device node has admission for this card */
 681                 if (!zcrypt_check_card(perms, zc->card->id))
 682                         continue;
 683                 /* get weight index of the card device  */
 684                 weight = zc->speed_rating[func_code];
 685                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 686                         continue;
 687                 for_each_zcrypt_queue(zq, zc) {
 688                         /* check if device is online and eligible */
 689                         if (!zq->online || !zq->ops->rsa_modexpo)
 690                                 continue;
 691                         /* check if device node has admission for this queue */
 692                         if (!zcrypt_check_queue(perms,
 693                                                 AP_QID_QUEUE(zq->queue->qid)))
 694                                 continue;
 695                         if (zcrypt_queue_compare(zq, pref_zq,
 696                                                  weight, pref_weight))
 697                                 continue;
 698                         pref_zc = zc;
 699                         pref_zq = zq;
 700                         pref_weight = weight;
 701                 }
 702         }
 703         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 704         spin_unlock(&zcrypt_list_lock);
 705
 706         if (!pref_zq) {
 707                 rc = -ENODEV;
 708                 goto out;
 709         }
 710
 711         qid = pref_zq->queue->qid;
 712         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
 713
 714         spin_lock(&zcrypt_list_lock);
 715         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 716         spin_unlock(&zcrypt_list_lock);
 717
 718 out:
 719         trace_s390_zcrypt_rep(mex, func_code, rc,
 720                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 721         return rc;
 722 }
 723
 724 static long zcrypt_rsa_crt(struct ap_perms *perms,
 725                            struct ica_rsa_modexpo_crt *crt)
 726 {
 727         struct zcrypt_card *zc, *pref_zc;
 728         struct zcrypt_queue *zq, *pref_zq;
 729         unsigned int weight, pref_weight;
 730         unsigned int func_code;
 731         int qid = 0, rc = -ENODEV;
 732         struct module *mod;
 733
 734         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
 735
 736         if (crt->outputdatalength < crt->inputdatalength) {
 737                 func_code = 0;
 738                 rc = -EINVAL;
 739                 goto out;
 740         }
 741
 742         /*
 743          * As long as outputdatalength is big enough, we can set the
 744          * outputdatalength equal to the inputdatalength, since that is the
 745          * number of bytes we will copy in any case
 746          */
 747         crt->outputdatalength = crt->inputdatalength;
 748
 749         rc = get_rsa_crt_fc(crt, &func_code);
 750         if (rc)
 751                 goto out;
 752
 753         pref_zc = NULL;
 754         pref_zq = NULL;
 755         spin_lock(&zcrypt_list_lock);
 756         for_each_zcrypt_card(zc) {
 757                 /* Check for online accelarator and CCA cards */
 758                 if (!zc->online || !(zc->card->functions & 0x18000000))
 759                         continue;
 760                 /* Check for size limits */
 761                 if (zc->min_mod_size > crt->inputdatalength ||
 762                     zc->max_mod_size < crt->inputdatalength)
 763                         continue;
 764                 /* check if device node has admission for this card */
 765                 if (!zcrypt_check_card(perms, zc->card->id))
 766                         continue;
 767                 /* get weight index of the card device  */
 768                 weight = zc->speed_rating[func_code];
 769                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 770                         continue;
 771                 for_each_zcrypt_queue(zq, zc) {
 772                         /* check if device is online and eligible */
 773                         if (!zq->online || !zq->ops->rsa_modexpo_crt)
 774                                 continue;
 775                         /* check if device node has admission for this queue */
 776                         if (!zcrypt_check_queue(perms,
 777                                                 AP_QID_QUEUE(zq->queue->qid)))
 778                                 continue;
 779                         if (zcrypt_queue_compare(zq, pref_zq,
 780                                                  weight, pref_weight))
 781                                 continue;
 782                         pref_zc = zc;
 783                         pref_zq = zq;
 784                         pref_weight = weight;
 785                 }
 786         }
 787         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 788         spin_unlock(&zcrypt_list_lock);
 789
 790         if (!pref_zq) {
 791                 rc = -ENODEV;
 792                 goto out;
 793         }
 794
 795         qid = pref_zq->queue->qid;
 796         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
 797
 798         spin_lock(&zcrypt_list_lock);
 799         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 800         spin_unlock(&zcrypt_list_lock);
 801
 802 out:
 803         trace_s390_zcrypt_rep(crt, func_code, rc,
 804                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 805         return rc;
 806 }
 807
 808 static long _zcrypt_send_cprb(struct ap_perms *perms,
 809                               struct ica_xcRB *xcRB)
 810 {
 811         struct zcrypt_card *zc, *pref_zc;
 812         struct zcrypt_queue *zq, *pref_zq;
 813         struct ap_message ap_msg;
 814         unsigned int weight, pref_weight;
 815         unsigned int func_code;
 816         unsigned short *domain, tdom;
 817         int qid = 0, rc = -ENODEV;
 818         struct module *mod;
 819
 820         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
 821
 822         xcRB->status = 0;
 823         ap_init_message(&ap_msg);
 824         rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
 825         if (rc)
 826                 goto out;
 827
 828         /*
 829          * If a valid target domain is set and this domain is NOT a usage
 830          * domain but a control only domain, use the default domain as target.
 831          */
 832         tdom = *domain;
 833         if (tdom >= 0 && tdom < AP_DOMAINS &&
 834             !ap_test_config_usage_domain(tdom) &&
 835             ap_test_config_ctrl_domain(tdom) &&
 836             ap_domain_index >= 0)
 837                 tdom = ap_domain_index;
 838
 839         pref_zc = NULL;
 840         pref_zq = NULL;
 841         spin_lock(&zcrypt_list_lock);
 842         for_each_zcrypt_card(zc) {
 843                 /* Check for online CCA cards */
 844                 if (!zc->online || !(zc->card->functions & 0x10000000))
 845                         continue;
 846                 /* Check for user selected CCA card */
 847                 if (xcRB->user_defined != AUTOSELECT &&
 848                     xcRB->user_defined != zc->card->id)
 849                         continue;
 850                 /* check if device node has admission for this card */
 851                 if (!zcrypt_check_card(perms, zc->card->id))
 852                         continue;
 853                 /* get weight index of the card device  */
 854                 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 855                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 856                         continue;
 857                 for_each_zcrypt_queue(zq, zc) {
 858                         /* check if device is online and eligible */
 859                         if (!zq->online ||
 860                             !zq->ops->send_cprb ||
 861                             (tdom != (unsigned short) AUTOSELECT &&
 862                              tdom != AP_QID_QUEUE(zq->queue->qid)))
 863                                 continue;
 864                         /* check if device node has admission for this queue */
 865                         if (!zcrypt_check_queue(perms,
 866                                                 AP_QID_QUEUE(zq->queue->qid)))
 867                                 continue;
 868                         if (zcrypt_queue_compare(zq, pref_zq,
 869                                                  weight, pref_weight))
 870                                 continue;
 871                         pref_zc = zc;
 872                         pref_zq = zq;
 873                         pref_weight = weight;
 874                 }
 875         }
 876         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 877         spin_unlock(&zcrypt_list_lock);
 878
 879         if (!pref_zq) {
 880                 rc = -ENODEV;
 881                 goto out;
 882         }
 883
 884         /* in case of auto select, provide the correct domain */
 885         qid = pref_zq->queue->qid;
 886         if (*domain == (unsigned short) AUTOSELECT)
 887                 *domain = AP_QID_QUEUE(qid);
 888
 889         rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
 890
 891         spin_lock(&zcrypt_list_lock);
 892         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 893         spin_unlock(&zcrypt_list_lock);
 894
 895 out:
 896         ap_release_message(&ap_msg);
 897         trace_s390_zcrypt_rep(xcRB, func_code, rc,
 898                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 899         return rc;
 900 }
 901
 902 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
 903 {
 904         return _zcrypt_send_cprb(&ap_perms, xcRB);
 905 }
 906 EXPORT_SYMBOL(zcrypt_send_cprb);
 907
 908 static bool is_desired_ep11_card(unsigned int dev_id,
 909                                  unsigned short target_num,
 910                                  struct ep11_target_dev *targets)
 911 {
 912         while (target_num-- > 0) {
 913                 if (dev_id == targets->ap_id)
 914                         return true;
 915                 targets++;
 916         }
 917         return false;
 918 }
 919
 920 static bool is_desired_ep11_queue(unsigned int dev_qid,
 921                                   unsigned short target_num,
 922                                   struct ep11_target_dev *targets)
 923 {
 924         while (target_num-- > 0) {
 925                 if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
 926                         return true;
 927                 targets++;
 928         }
 929         return false;
 930 }
 931
 932 static long zcrypt_send_ep11_cprb(struct ap_perms *perms,
 933                                   struct ep11_urb *xcrb)
 934 {
 935         struct zcrypt_card *zc, *pref_zc;
 936         struct zcrypt_queue *zq, *pref_zq;
 937         struct ep11_target_dev *targets;
 938         unsigned short target_num;
 939         unsigned int weight, pref_weight;
 940         unsigned int func_code;
 941         struct ap_message ap_msg;
 942         int qid = 0, rc = -ENODEV;
 943         struct module *mod;
 944
 945         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
 946
 947         ap_init_message(&ap_msg);
 948
 949         target_num = (unsigned short) xcrb->targets_num;
 950
 951         /* empty list indicates autoselect (all available targets) */
 952         targets = NULL;
 953         if (target_num != 0) {
 954                 struct ep11_target_dev __user *uptr;
 955
 956                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
 957                 if (!targets) {
 958                         func_code = 0;
 959                         rc = -ENOMEM;
 960                         goto out;
 961                 }
 962
 963                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
 964                 if (copy_from_user(targets, uptr,
 965                                    target_num * sizeof(*targets))) {
 966                         func_code = 0;
 967                         rc = -EFAULT;
 968                         goto out_free;
 969                 }
 970         }
 971
 972         rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
 973         if (rc)
 974                 goto out_free;
 975
 976         pref_zc = NULL;
 977         pref_zq = NULL;
 978         spin_lock(&zcrypt_list_lock);
 979         for_each_zcrypt_card(zc) {
 980                 /* Check for online EP11 cards */
 981                 if (!zc->online || !(zc->card->functions & 0x04000000))
 982                         continue;
 983                 /* Check for user selected EP11 card */
 984                 if (targets &&
 985                     !is_desired_ep11_card(zc->card->id, target_num, targets))
 986                         continue;
 987                 /* check if device node has admission for this card */
 988                 if (!zcrypt_check_card(perms, zc->card->id))
 989                         continue;
 990                 /* get weight index of the card device  */
 991                 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
 992                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 993                         continue;
 994                 for_each_zcrypt_queue(zq, zc) {
 995                         /* check if device is online and eligible */
 996                         if (!zq->online ||
 997                             !zq->ops->send_ep11_cprb ||
 998                             (targets &&
 999                              !is_desired_ep11_queue(zq->queue->qid,
1000                                                     target_num, targets)))
1001                                 continue;
1002                         /* check if device node has admission for this queue */
1003                         if (!zcrypt_check_queue(perms,
1004                                                 AP_QID_QUEUE(zq->queue->qid)))
1005                                 continue;
1006                         if (zcrypt_queue_compare(zq, pref_zq,
1007                                                  weight, pref_weight))
1008                                 continue;
1009                         pref_zc = zc;
1010                         pref_zq = zq;
1011                         pref_weight = weight;
1012                 }
1013         }
1014         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1015         spin_unlock(&zcrypt_list_lock);
1016
1017         if (!pref_zq) {
1018                 rc = -ENODEV;
1019                 goto out_free;
1020         }
1021
1022         qid = pref_zq->queue->qid;
1023         rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
1024
1025         spin_lock(&zcrypt_list_lock);
1026         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1027         spin_unlock(&zcrypt_list_lock);
1028
1029 out_free:
1030         kfree(targets);
1031 out:
1032         ap_release_message(&ap_msg);
1033         trace_s390_zcrypt_rep(xcrb, func_code, rc,
1034                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1035         return rc;
1036 }
1037
1038 static long zcrypt_rng(char *buffer)
1039 {
1040         struct zcrypt_card *zc, *pref_zc;
1041         struct zcrypt_queue *zq, *pref_zq;
1042         unsigned int weight, pref_weight;
1043         unsigned int func_code;
1044         struct ap_message ap_msg;
1045         unsigned int domain;
1046         int qid = 0, rc = -ENODEV;
1047         struct module *mod;
1048
1049         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1050
1051         ap_init_message(&ap_msg);
1052         rc = get_rng_fc(&ap_msg, &func_code, &domain);
1053         if (rc)
1054                 goto out;
1055
1056         pref_zc = NULL;
1057         pref_zq = NULL;
1058         spin_lock(&zcrypt_list_lock);
1059         for_each_zcrypt_card(zc) {
1060                 /* Check for online CCA cards */
1061                 if (!zc->online || !(zc->card->functions & 0x10000000))
1062                         continue;
1063                 /* get weight index of the card device  */
1064                 weight = zc->speed_rating[func_code];
1065                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1066                         continue;
1067                 for_each_zcrypt_queue(zq, zc) {
1068                         /* check if device is online and eligible */
1069                         if (!zq->online || !zq->ops->rng)
1070                                 continue;
1071                         if (zcrypt_queue_compare(zq, pref_zq,
1072                                                  weight, pref_weight))
1073                                 continue;
1074                         pref_zc = zc;
1075                         pref_zq = zq;
1076                         pref_weight = weight;
1077                 }
1078         }
1079         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1080         spin_unlock(&zcrypt_list_lock);
1081
1082         if (!pref_zq) {
1083                 rc = -ENODEV;
1084                 goto out;
1085         }
1086
1087         qid = pref_zq->queue->qid;
1088         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1089
1090         spin_lock(&zcrypt_list_lock);
1091         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1092         spin_unlock(&zcrypt_list_lock);
1093
1094 out:
1095         ap_release_message(&ap_msg);
1096         trace_s390_zcrypt_rep(buffer, func_code, rc,
1097                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1098         return rc;
1099 }
1100
1101 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1102 {
1103         struct zcrypt_card *zc;
1104         struct zcrypt_queue *zq;
1105         struct zcrypt_device_status *stat;
1106         int card, queue;
1107
1108         memset(devstatus, 0, MAX_ZDEV_ENTRIES
1109                * sizeof(struct zcrypt_device_status));
1110
1111         spin_lock(&zcrypt_list_lock);
1112         for_each_zcrypt_card(zc) {
1113                 for_each_zcrypt_queue(zq, zc) {
1114                         card = AP_QID_CARD(zq->queue->qid);
1115                         if (card >= MAX_ZDEV_CARDIDS)
1116                                 continue;
1117                         queue = AP_QID_QUEUE(zq->queue->qid);
1118                         stat = &devstatus[card * AP_DOMAINS + queue];
1119                         stat->hwtype = zc->card->ap_dev.device_type;
1120                         stat->functions = zc->card->functions >> 26;
1121                         stat->qid = zq->queue->qid;
1122                         stat->online = zq->online ? 0x01 : 0x00;
1123                 }
1124         }
1125         spin_unlock(&zcrypt_list_lock);
1126 }
1127
1128 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1129 {
1130         struct zcrypt_card *zc;
1131         struct zcrypt_queue *zq;
1132         struct zcrypt_device_status_ext *stat;
1133         int card, queue;
1134
1135         memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1136                * sizeof(struct zcrypt_device_status_ext));
1137
1138         spin_lock(&zcrypt_list_lock);
1139         for_each_zcrypt_card(zc) {
1140                 for_each_zcrypt_queue(zq, zc) {
1141                         card = AP_QID_CARD(zq->queue->qid);
1142                         queue = AP_QID_QUEUE(zq->queue->qid);
1143                         stat = &devstatus[card * AP_DOMAINS + queue];
1144                         stat->hwtype = zc->card->ap_dev.device_type;
1145                         stat->functions = zc->card->functions >> 26;
1146                         stat->qid = zq->queue->qid;
1147                         stat->online = zq->online ? 0x01 : 0x00;
1148                 }
1149         }
1150         spin_unlock(&zcrypt_list_lock);
1151 }
1152 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1153
1154 static void zcrypt_status_mask(char status[], size_t max_adapters)
1155 {
1156         struct zcrypt_card *zc;
1157         struct zcrypt_queue *zq;
1158         int card;
1159
1160         memset(status, 0, max_adapters);
1161         spin_lock(&zcrypt_list_lock);
1162         for_each_zcrypt_card(zc) {
1163                 for_each_zcrypt_queue(zq, zc) {
1164                         card = AP_QID_CARD(zq->queue->qid);
1165                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1166                             || card >= max_adapters)
1167                                 continue;
1168                         status[card] = zc->online ? zc->user_space_type : 0x0d;
1169                 }
1170         }
1171         spin_unlock(&zcrypt_list_lock);
1172 }
1173
1174 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1175 {
1176         struct zcrypt_card *zc;
1177         struct zcrypt_queue *zq;
1178         int card;
1179
1180         memset(qdepth, 0, max_adapters);
1181         spin_lock(&zcrypt_list_lock);
1182         local_bh_disable();
1183         for_each_zcrypt_card(zc) {
1184                 for_each_zcrypt_queue(zq, zc) {
1185                         card = AP_QID_CARD(zq->queue->qid);
1186                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1187                             || card >= max_adapters)
1188                                 continue;
1189                         spin_lock(&zq->queue->lock);
1190                         qdepth[card] =
1191                                 zq->queue->pendingq_count +
1192                                 zq->queue->requestq_count;
1193                         spin_unlock(&zq->queue->lock);
1194                 }
1195         }
1196         local_bh_enable();
1197         spin_unlock(&zcrypt_list_lock);
1198 }
1199
1200 static void zcrypt_perdev_reqcnt(int reqcnt[], size_t max_adapters)
1201 {
1202         struct zcrypt_card *zc;
1203         struct zcrypt_queue *zq;
1204         int card;
1205
1206         memset(reqcnt, 0, sizeof(int) * max_adapters);
1207         spin_lock(&zcrypt_list_lock);
1208         local_bh_disable();
1209         for_each_zcrypt_card(zc) {
1210                 for_each_zcrypt_queue(zq, zc) {
1211                         card = AP_QID_CARD(zq->queue->qid);
1212                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1213                             || card >= max_adapters)
1214                                 continue;
1215                         spin_lock(&zq->queue->lock);
1216                         reqcnt[card] = zq->queue->total_request_count;
1217                         spin_unlock(&zq->queue->lock);
1218                 }
1219         }
1220         local_bh_enable();
1221         spin_unlock(&zcrypt_list_lock);
1222 }
1223
1224 static int zcrypt_pendingq_count(void)
1225 {
1226         struct zcrypt_card *zc;
1227         struct zcrypt_queue *zq;
1228         int pendingq_count;
1229
1230         pendingq_count = 0;
1231         spin_lock(&zcrypt_list_lock);
1232         local_bh_disable();
1233         for_each_zcrypt_card(zc) {
1234                 for_each_zcrypt_queue(zq, zc) {
1235                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1236                                 continue;
1237                         spin_lock(&zq->queue->lock);
1238                         pendingq_count += zq->queue->pendingq_count;
1239                         spin_unlock(&zq->queue->lock);
1240                 }
1241         }
1242         local_bh_enable();
1243         spin_unlock(&zcrypt_list_lock);
1244         return pendingq_count;
1245 }
1246
1247 static int zcrypt_requestq_count(void)
1248 {
1249         struct zcrypt_card *zc;
1250         struct zcrypt_queue *zq;
1251         int requestq_count;
1252
1253         requestq_count = 0;
1254         spin_lock(&zcrypt_list_lock);
1255         local_bh_disable();
1256         for_each_zcrypt_card(zc) {
1257                 for_each_zcrypt_queue(zq, zc) {
1258                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1259                                 continue;
1260                         spin_lock(&zq->queue->lock);
1261                         requestq_count += zq->queue->requestq_count;
1262                         spin_unlock(&zq->queue->lock);
1263                 }
1264         }
1265         local_bh_enable();
1266         spin_unlock(&zcrypt_list_lock);
1267         return requestq_count;
1268 }
1269
1270 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1271                                   unsigned long arg)
1272 {
1273         int rc;
1274         struct ap_perms *perms =
1275                 (struct ap_perms *) filp->private_data;
1276
1277         rc = zcrypt_check_ioctl(perms, cmd);
1278         if (rc)
1279                 return rc;
1280
1281         switch (cmd) {
1282         case ICARSAMODEXPO: {
1283                 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1284                 struct ica_rsa_modexpo mex;
1285
1286                 if (copy_from_user(&mex, umex, sizeof(mex)))
1287                         return -EFAULT;
1288                 do {
1289                         rc = zcrypt_rsa_modexpo(perms, &mex);
1290                 } while (rc == -EAGAIN);
1291                 /* on failure: retry once again after a requested rescan */
1292                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1293                         do {
1294                                 rc = zcrypt_rsa_modexpo(perms, &mex);
1295                         } while (rc == -EAGAIN);
1296                 if (rc) {
1297                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1298                         return rc;
1299                 }
1300                 return put_user(mex.outputdatalength, &umex->outputdatalength);
1301         }
1302         case ICARSACRT: {
1303                 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1304                 struct ica_rsa_modexpo_crt crt;
1305
1306                 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1307                         return -EFAULT;
1308                 do {
1309                         rc = zcrypt_rsa_crt(perms, &crt);
1310                 } while (rc == -EAGAIN);
1311                 /* on failure: retry once again after a requested rescan */
1312                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1313                         do {
1314                                 rc = zcrypt_rsa_crt(perms, &crt);
1315                         } while (rc == -EAGAIN);
1316                 if (rc) {
1317                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1318                         return rc;
1319                 }
1320                 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1321         }
1322         case ZSECSENDCPRB: {
1323                 struct ica_xcRB __user *uxcRB = (void __user *) arg;
1324                 struct ica_xcRB xcRB;
1325
1326                 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1327                         return -EFAULT;
1328                 do {
1329                         rc = _zcrypt_send_cprb(perms, &xcRB);
1330                 } while (rc == -EAGAIN);
1331                 /* on failure: retry once again after a requested rescan */
1332                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1333                         do {
1334                                 rc = _zcrypt_send_cprb(perms, &xcRB);
1335                         } while (rc == -EAGAIN);
1336                 if (rc)
1337                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1338                                    rc, xcRB.status);
1339                 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1340                         return -EFAULT;
1341                 return rc;
1342         }
1343         case ZSENDEP11CPRB: {
1344                 struct ep11_urb __user *uxcrb = (void __user *)arg;
1345                 struct ep11_urb xcrb;
1346
1347                 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1348                         return -EFAULT;
1349                 do {
1350                         rc = zcrypt_send_ep11_cprb(perms, &xcrb);
1351                 } while (rc == -EAGAIN);
1352                 /* on failure: retry once again after a requested rescan */
1353                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1354                         do {
1355                                 rc = zcrypt_send_ep11_cprb(perms, &xcrb);
1356                         } while (rc == -EAGAIN);
1357                 if (rc)
1358                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1359                 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1360                         return -EFAULT;
1361                 return rc;
1362         }
1363         case ZCRYPT_DEVICE_STATUS: {
1364                 struct zcrypt_device_status_ext *device_status;
1365                 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1366                         * sizeof(struct zcrypt_device_status_ext);
1367
1368                 device_status = kzalloc(total_size, GFP_KERNEL);
1369                 if (!device_status)
1370                         return -ENOMEM;
1371                 zcrypt_device_status_mask_ext(device_status);
1372                 if (copy_to_user((char __user *) arg, device_status,
1373                                  total_size))
1374                         rc = -EFAULT;
1375                 kfree(device_status);
1376                 return rc;
1377         }
1378         case ZCRYPT_STATUS_MASK: {
1379                 char status[AP_DEVICES];
1380
1381                 zcrypt_status_mask(status, AP_DEVICES);
1382                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1383                         return -EFAULT;
1384                 return 0;
1385         }
1386         case ZCRYPT_QDEPTH_MASK: {
1387                 char qdepth[AP_DEVICES];
1388
1389                 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1390                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1391                         return -EFAULT;
1392                 return 0;
1393         }
1394         case ZCRYPT_PERDEV_REQCNT: {
1395                 int *reqcnt;
1396
1397                 reqcnt = kcalloc(AP_DEVICES, sizeof(int), GFP_KERNEL);
1398                 if (!reqcnt)
1399                         return -ENOMEM;
1400                 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1401                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1402                         rc = -EFAULT;
1403                 kfree(reqcnt);
1404                 return rc;
1405         }
1406         case Z90STAT_REQUESTQ_COUNT:
1407                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1408         case Z90STAT_PENDINGQ_COUNT:
1409                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1410         case Z90STAT_TOTALOPEN_COUNT:
1411                 return put_user(atomic_read(&zcrypt_open_count),
1412                                 (int __user *) arg);
1413         case Z90STAT_DOMAIN_INDEX:
1414                 return put_user(ap_domain_index, (int __user *) arg);
1415         /*
1416          * Deprecated ioctls
1417          */
1418         case ZDEVICESTATUS: {
1419                 /* the old ioctl supports only 64 adapters */
1420                 struct zcrypt_device_status *device_status;
1421                 size_t total_size = MAX_ZDEV_ENTRIES
1422                         * sizeof(struct zcrypt_device_status);
1423
1424                 device_status = kzalloc(total_size, GFP_KERNEL);
1425                 if (!device_status)
1426                         return -ENOMEM;
1427                 zcrypt_device_status_mask(device_status);
1428                 if (copy_to_user((char __user *) arg, device_status,
1429                                  total_size))
1430                         rc = -EFAULT;
1431                 kfree(device_status);
1432                 return rc;
1433         }
1434         case Z90STAT_STATUS_MASK: {
1435                 /* the old ioctl supports only 64 adapters */
1436                 char status[MAX_ZDEV_CARDIDS];
1437
1438                 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1439                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1440                         return -EFAULT;
1441                 return 0;
1442         }
1443         case Z90STAT_QDEPTH_MASK: {
1444                 /* the old ioctl supports only 64 adapters */
1445                 char qdepth[MAX_ZDEV_CARDIDS];
1446
1447                 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1448                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1449                         return -EFAULT;
1450                 return 0;
1451         }
1452         case Z90STAT_PERDEV_REQCNT: {
1453                 /* the old ioctl supports only 64 adapters */
1454                 int reqcnt[MAX_ZDEV_CARDIDS];
1455
1456                 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1457                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1458                         return -EFAULT;
1459                 return 0;
1460         }
1461         /* unknown ioctl number */
1462         default:
1463                 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1464                 return -ENOIOCTLCMD;
1465         }
1466 }
1467
1468 #ifdef CONFIG_COMPAT
1469 /*
1470  * ioctl32 conversion routines
1471  */
1472 struct compat_ica_rsa_modexpo {
1473         compat_uptr_t   inputdata;
1474         unsigned int    inputdatalength;
1475         compat_uptr_t   outputdata;
1476         unsigned int    outputdatalength;
1477         compat_uptr_t   b_key;
1478         compat_uptr_t   n_modulus;
1479 };
1480
1481 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1482                             unsigned int cmd, unsigned long arg)
1483 {
1484         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1485         struct compat_ica_rsa_modexpo mex32;
1486         struct ica_rsa_modexpo mex64;
1487         long rc;
1488
1489         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1490                 return -EFAULT;
1491         mex64.inputdata = compat_ptr(mex32.inputdata);
1492         mex64.inputdatalength = mex32.inputdatalength;
1493         mex64.outputdata = compat_ptr(mex32.outputdata);
1494         mex64.outputdatalength = mex32.outputdatalength;
1495         mex64.b_key = compat_ptr(mex32.b_key);
1496         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1497         do {
1498                 rc = zcrypt_rsa_modexpo(perms, &mex64);
1499         } while (rc == -EAGAIN);
1500         /* on failure: retry once again after a requested rescan */
1501         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1502                 do {
1503                         rc = zcrypt_rsa_modexpo(perms, &mex64);
1504                 } while (rc == -EAGAIN);
1505         if (rc)
1506                 return rc;
1507         return put_user(mex64.outputdatalength,
1508                         &umex32->outputdatalength);
1509 }
1510
1511 struct compat_ica_rsa_modexpo_crt {
1512         compat_uptr_t   inputdata;
1513         unsigned int    inputdatalength;
1514         compat_uptr_t   outputdata;
1515         unsigned int    outputdatalength;
1516         compat_uptr_t   bp_key;
1517         compat_uptr_t   bq_key;
1518         compat_uptr_t   np_prime;
1519         compat_uptr_t   nq_prime;
1520         compat_uptr_t   u_mult_inv;
1521 };
1522
1523 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1524                                 unsigned int cmd, unsigned long arg)
1525 {
1526         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1527         struct compat_ica_rsa_modexpo_crt crt32;
1528         struct ica_rsa_modexpo_crt crt64;
1529         long rc;
1530
1531         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1532                 return -EFAULT;
1533         crt64.inputdata = compat_ptr(crt32.inputdata);
1534         crt64.inputdatalength = crt32.inputdatalength;
1535         crt64.outputdata = compat_ptr(crt32.outputdata);
1536         crt64.outputdatalength = crt32.outputdatalength;
1537         crt64.bp_key = compat_ptr(crt32.bp_key);
1538         crt64.bq_key = compat_ptr(crt32.bq_key);
1539         crt64.np_prime = compat_ptr(crt32.np_prime);
1540         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1541         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1542         do {
1543                 rc = zcrypt_rsa_crt(perms, &crt64);
1544         } while (rc == -EAGAIN);
1545         /* on failure: retry once again after a requested rescan */
1546         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1547                 do {
1548                         rc = zcrypt_rsa_crt(perms, &crt64);
1549                 } while (rc == -EAGAIN);
1550         if (rc)
1551                 return rc;
1552         return put_user(crt64.outputdatalength,
1553                         &ucrt32->outputdatalength);
1554 }
1555
1556 struct compat_ica_xcRB {
1557         unsigned short  agent_ID;
1558         unsigned int    user_defined;
1559         unsigned short  request_ID;
1560         unsigned int    request_control_blk_length;
1561         unsigned char   padding1[16 - sizeof(compat_uptr_t)];
1562         compat_uptr_t   request_control_blk_addr;
1563         unsigned int    request_data_length;
1564         char            padding2[16 - sizeof(compat_uptr_t)];
1565         compat_uptr_t   request_data_address;
1566         unsigned int    reply_control_blk_length;
1567         char            padding3[16 - sizeof(compat_uptr_t)];
1568         compat_uptr_t   reply_control_blk_addr;
1569         unsigned int    reply_data_length;
1570         char            padding4[16 - sizeof(compat_uptr_t)];
1571         compat_uptr_t   reply_data_addr;
1572         unsigned short  priority_window;
1573         unsigned int    status;
1574 } __packed;
1575
1576 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1577                          unsigned int cmd, unsigned long arg)
1578 {
1579         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1580         struct compat_ica_xcRB xcRB32;
1581         struct ica_xcRB xcRB64;
1582         long rc;
1583
1584         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1585                 return -EFAULT;
1586         xcRB64.agent_ID = xcRB32.agent_ID;
1587         xcRB64.user_defined = xcRB32.user_defined;
1588         xcRB64.request_ID = xcRB32.request_ID;
1589         xcRB64.request_control_blk_length =
1590                 xcRB32.request_control_blk_length;
1591         xcRB64.request_control_blk_addr =
1592                 compat_ptr(xcRB32.request_control_blk_addr);
1593         xcRB64.request_data_length =
1594                 xcRB32.request_data_length;
1595         xcRB64.request_data_address =
1596                 compat_ptr(xcRB32.request_data_address);
1597         xcRB64.reply_control_blk_length =
1598                 xcRB32.reply_control_blk_length;
1599         xcRB64.reply_control_blk_addr =
1600                 compat_ptr(xcRB32.reply_control_blk_addr);
1601         xcRB64.reply_data_length = xcRB32.reply_data_length;
1602         xcRB64.reply_data_addr =
1603                 compat_ptr(xcRB32.reply_data_addr);
1604         xcRB64.priority_window = xcRB32.priority_window;
1605         xcRB64.status = xcRB32.status;
1606         do {
1607                 rc = _zcrypt_send_cprb(perms, &xcRB64);
1608         } while (rc == -EAGAIN);
1609         /* on failure: retry once again after a requested rescan */
1610         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1611                 do {
1612                         rc = _zcrypt_send_cprb(perms, &xcRB64);
1613                 } while (rc == -EAGAIN);
1614         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1615         xcRB32.reply_data_length = xcRB64.reply_data_length;
1616         xcRB32.status = xcRB64.status;
1617         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1618                 return -EFAULT;
1619         return rc;
1620 }
1621
1622 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1623                          unsigned long arg)
1624 {
1625         int rc;
1626         struct ap_perms *perms =
1627                 (struct ap_perms *) filp->private_data;
1628
1629         rc = zcrypt_check_ioctl(perms, cmd);
1630         if (rc)
1631                 return rc;
1632
1633         if (cmd == ICARSAMODEXPO)
1634                 return trans_modexpo32(perms, filp, cmd, arg);
1635         if (cmd == ICARSACRT)
1636                 return trans_modexpo_crt32(perms, filp, cmd, arg);
1637         if (cmd == ZSECSENDCPRB)
1638                 return trans_xcRB32(perms, filp, cmd, arg);
1639         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1640 }
1641 #endif
1642
1643 /*
1644  * Misc device file operations.
1645  */
1646 static const struct file_operations zcrypt_fops = {
1647         .owner          = THIS_MODULE,
1648         .read           = zcrypt_read,
1649         .write          = zcrypt_write,
1650         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1651 #ifdef CONFIG_COMPAT
1652         .compat_ioctl   = zcrypt_compat_ioctl,
1653 #endif
1654         .open           = zcrypt_open,
1655         .release        = zcrypt_release,
1656         .llseek         = no_llseek,
1657 };
1658
1659 /*
1660  * Misc device.
1661  */
1662 static struct miscdevice zcrypt_misc_device = {
1663         .minor      = MISC_DYNAMIC_MINOR,
1664         .name       = "z90crypt",
1665         .fops       = &zcrypt_fops,
1666 };
1667
1668 static int zcrypt_rng_device_count;
1669 static u32 *zcrypt_rng_buffer;
1670 static int zcrypt_rng_buffer_index;
1671 static DEFINE_MUTEX(zcrypt_rng_mutex);
1672
1673 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1674 {
1675         int rc;
1676
1677         /*
1678          * We don't need locking here because the RNG API guarantees serialized
1679          * read method calls.
1680          */
1681         if (zcrypt_rng_buffer_index == 0) {
1682                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1683                 /* on failure: retry once again after a requested rescan */
1684                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1685                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1686                 if (rc < 0)
1687                         return -EIO;
1688                 zcrypt_rng_buffer_index = rc / sizeof(*data);
1689         }
1690         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1691         return sizeof(*data);
1692 }
1693
1694 static struct hwrng zcrypt_rng_dev = {
1695         .name           = "zcrypt",
1696         .data_read      = zcrypt_rng_data_read,
1697         .quality        = 990,
1698 };
1699
1700 int zcrypt_rng_device_add(void)
1701 {
1702         int rc = 0;
1703
1704         mutex_lock(&zcrypt_rng_mutex);
1705         if (zcrypt_rng_device_count == 0) {
1706                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1707                 if (!zcrypt_rng_buffer) {
1708                         rc = -ENOMEM;
1709                         goto out;
1710                 }
1711                 zcrypt_rng_buffer_index = 0;
1712                 if (!zcrypt_hwrng_seed)
1713                         zcrypt_rng_dev.quality = 0;
1714                 rc = hwrng_register(&zcrypt_rng_dev);
1715                 if (rc)
1716                         goto out_free;
1717                 zcrypt_rng_device_count = 1;
1718         } else
1719                 zcrypt_rng_device_count++;
1720         mutex_unlock(&zcrypt_rng_mutex);
1721         return 0;
1722
1723 out_free:
1724         free_page((unsigned long) zcrypt_rng_buffer);
1725 out:
1726         mutex_unlock(&zcrypt_rng_mutex);
1727         return rc;
1728 }
1729
1730 void zcrypt_rng_device_remove(void)
1731 {
1732         mutex_lock(&zcrypt_rng_mutex);
1733         zcrypt_rng_device_count--;
1734         if (zcrypt_rng_device_count == 0) {
1735                 hwrng_unregister(&zcrypt_rng_dev);
1736                 free_page((unsigned long) zcrypt_rng_buffer);
1737         }
1738         mutex_unlock(&zcrypt_rng_mutex);
1739 }
1740
1741 int __init zcrypt_debug_init(void)
1742 {
1743         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1744                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
1745         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1746         debug_set_level(zcrypt_dbf_info, DBF_ERR);
1747
1748         return 0;
1749 }
1750
1751 void zcrypt_debug_exit(void)
1752 {
1753         debug_unregister(zcrypt_dbf_info);
1754 }
1755
1756 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1757
1758 static int __init zcdn_init(void)
1759 {
1760         int rc;
1761
1762         /* create a new class 'zcrypt' */
1763         zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
1764         if (IS_ERR(zcrypt_class)) {
1765                 rc = PTR_ERR(zcrypt_class);
1766                 goto out_class_create_failed;
1767         }
1768         zcrypt_class->dev_release = zcdn_device_release;
1769
1770         /* alloc device minor range */
1771         rc = alloc_chrdev_region(&zcrypt_devt,
1772                                  0, ZCRYPT_MAX_MINOR_NODES,
1773                                  ZCRYPT_NAME);
1774         if (rc)
1775                 goto out_alloc_chrdev_failed;
1776
1777         cdev_init(&zcrypt_cdev, &zcrypt_fops);
1778         zcrypt_cdev.owner = THIS_MODULE;
1779         rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1780         if (rc)
1781                 goto out_cdev_add_failed;
1782
1783         /* need some class specific sysfs attributes */
1784         rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
1785         if (rc)
1786                 goto out_class_create_file_1_failed;
1787         rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
1788         if (rc)
1789                 goto out_class_create_file_2_failed;
1790
1791         return 0;
1792
1793 out_class_create_file_2_failed:
1794         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1795 out_class_create_file_1_failed:
1796         cdev_del(&zcrypt_cdev);
1797 out_cdev_add_failed:
1798         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1799 out_alloc_chrdev_failed:
1800         class_destroy(zcrypt_class);
1801 out_class_create_failed:
1802         return rc;
1803 }
1804
1805 static void zcdn_exit(void)
1806 {
1807         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1808         class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
1809         zcdn_destroy_all();
1810         cdev_del(&zcrypt_cdev);
1811         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1812         class_destroy(zcrypt_class);
1813 }
1814
1815 #endif
1816
1817 /**
1818  * zcrypt_api_init(): Module initialization.
1819  *
1820  * The module initialization code.
1821  */
1822 int __init zcrypt_api_init(void)
1823 {
1824         int rc;
1825
1826         rc = zcrypt_debug_init();
1827         if (rc)
1828                 goto out;
1829
1830 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1831         rc = zcdn_init();
1832         if (rc)
1833                 goto out;
1834 #endif
1835
1836         /* Register the request sprayer. */
1837         rc = misc_register(&zcrypt_misc_device);
1838         if (rc < 0)
1839                 goto out_misc_register_failed;
1840
1841         zcrypt_msgtype6_init();
1842         zcrypt_msgtype50_init();
1843
1844         return 0;
1845
1846 out_misc_register_failed:
1847 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1848         zcdn_exit();
1849 #endif
1850         zcrypt_debug_exit();
1851 out:
1852         return rc;
1853 }
1854
1855 /**
1856  * zcrypt_api_exit(): Module termination.
1857  *
1858  * The module termination code.
1859  */
1860 void __exit zcrypt_api_exit(void)
1861 {
1862 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1863         zcdn_exit();
1864 #endif
1865         misc_deregister(&zcrypt_misc_device);
1866         zcrypt_msgtype6_exit();
1867         zcrypt_msgtype50_exit();
1868         zcrypt_debug_exit();
1869 }
1870
1871 module_init(zcrypt_api_init);
1872 module_exit(zcrypt_api_exit);