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                 if (mutex_lock_interruptible(&ap_perms_mutex))
 543                         return -ERESTARTSYS;
 544                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 545                 mutex_unlock(&ap_perms_mutex);
 546                 if (zcdndev) {
 547                         /* 2 puts here: one for find, one for open */
 548                         put_device(&zcdndev->device);
 549                         put_device(&zcdndev->device);
 550                 }
 551         }
 552 #endif
 553
 554         atomic_dec(&zcrypt_open_count);
 555         return 0;
 556 }
 557
 558 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
 559                                      unsigned int cmd)
 560 {
 561         int rc = -EPERM;
 562         int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
 563
 564         if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
 565                 if (test_bit_inv(ioctlnr, perms->ioctlm))
 566                         rc = 0;
 567         }
 568
 569         if (rc)
 570                 ZCRYPT_DBF(DBF_WARN,
 571                            "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
 572                            ioctlnr, rc);
 573
 574         return rc;
 575 }
 576
 577 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
 578 {
 579         return test_bit_inv(card, perms->apm) ? true : false;
 580 }
 581
 582 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
 583 {
 584         return test_bit_inv(queue, perms->aqm) ? true : false;
 585 }
 586
 587 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
 588                                                      struct zcrypt_queue *zq,
 589                                                      struct module **pmod,
 590                                                      unsigned int weight)
 591 {
 592         if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
 593                 return NULL;
 594         zcrypt_queue_get(zq);
 595         get_device(&zq->queue->ap_dev.device);
 596         atomic_add(weight, &zc->load);
 597         atomic_add(weight, &zq->load);
 598         zq->request_count++;
 599         *pmod = zq->queue->ap_dev.drv->driver.owner;
 600         return zq;
 601 }
 602
 603 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
 604                                      struct zcrypt_queue *zq,
 605                                      struct module *mod,
 606                                      unsigned int weight)
 607 {
 608         zq->request_count--;
 609         atomic_sub(weight, &zc->load);
 610         atomic_sub(weight, &zq->load);
 611         put_device(&zq->queue->ap_dev.device);
 612         zcrypt_queue_put(zq);
 613         module_put(mod);
 614 }
 615
 616 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
 617                                        struct zcrypt_card *pref_zc,
 618                                        unsigned int weight,
 619                                        unsigned int pref_weight)
 620 {
 621         if (!pref_zc)
 622                 return false;
 623         weight += atomic_read(&zc->load);
 624         pref_weight += atomic_read(&pref_zc->load);
 625         if (weight == pref_weight)
 626                 return atomic_read(&zc->card->total_request_count) >
 627                         atomic_read(&pref_zc->card->total_request_count);
 628         return weight > pref_weight;
 629 }
 630
 631 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
 632                                         struct zcrypt_queue *pref_zq,
 633                                         unsigned int weight,
 634                                         unsigned int pref_weight)
 635 {
 636         if (!pref_zq)
 637                 return false;
 638         weight += atomic_read(&zq->load);
 639         pref_weight += atomic_read(&pref_zq->load);
 640         if (weight == pref_weight)
 641                 return zq->queue->total_request_count >
 642                         pref_zq->queue->total_request_count;
 643         return weight > pref_weight;
 644 }
 645
 646 /*
 647  * zcrypt ioctls.
 648  */
 649 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
 650                                struct ica_rsa_modexpo *mex)
 651 {
 652         struct zcrypt_card *zc, *pref_zc;
 653         struct zcrypt_queue *zq, *pref_zq;
 654         unsigned int weight, pref_weight;
 655         unsigned int func_code;
 656         int qid = 0, rc = -ENODEV;
 657         struct module *mod;
 658
 659         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
 660
 661         if (mex->outputdatalength < mex->inputdatalength) {
 662                 func_code = 0;
 663                 rc = -EINVAL;
 664                 goto out;
 665         }
 666
 667         /*
 668          * As long as outputdatalength is big enough, we can set the
 669          * outputdatalength equal to the inputdatalength, since that is the
 670          * number of bytes we will copy in any case
 671          */
 672         mex->outputdatalength = mex->inputdatalength;
 673
 674         rc = get_rsa_modex_fc(mex, &func_code);
 675         if (rc)
 676                 goto out;
 677
 678         pref_zc = NULL;
 679         pref_zq = NULL;
 680         spin_lock(&zcrypt_list_lock);
 681         for_each_zcrypt_card(zc) {
 682                 /* Check for online accelarator and CCA cards */
 683                 if (!zc->online || !(zc->card->functions & 0x18000000))
 684                         continue;
 685                 /* Check for size limits */
 686                 if (zc->min_mod_size > mex->inputdatalength ||
 687                     zc->max_mod_size < mex->inputdatalength)
 688                         continue;
 689                 /* check if device node has admission for this card */
 690                 if (!zcrypt_check_card(perms, zc->card->id))
 691                         continue;
 692                 /* get weight index of the card device  */
 693                 weight = zc->speed_rating[func_code];
 694                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 695                         continue;
 696                 for_each_zcrypt_queue(zq, zc) {
 697                         /* check if device is online and eligible */
 698                         if (!zq->online || !zq->ops->rsa_modexpo)
 699                                 continue;
 700                         /* check if device node has admission for this queue */
 701                         if (!zcrypt_check_queue(perms,
 702                                                 AP_QID_QUEUE(zq->queue->qid)))
 703                                 continue;
 704                         if (zcrypt_queue_compare(zq, pref_zq,
 705                                                  weight, pref_weight))
 706                                 continue;
 707                         pref_zc = zc;
 708                         pref_zq = zq;
 709                         pref_weight = weight;
 710                 }
 711         }
 712         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 713         spin_unlock(&zcrypt_list_lock);
 714
 715         if (!pref_zq) {
 716                 rc = -ENODEV;
 717                 goto out;
 718         }
 719
 720         qid = pref_zq->queue->qid;
 721         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
 722
 723         spin_lock(&zcrypt_list_lock);
 724         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 725         spin_unlock(&zcrypt_list_lock);
 726
 727 out:
 728         trace_s390_zcrypt_rep(mex, func_code, rc,
 729                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 730         return rc;
 731 }
 732
 733 static long zcrypt_rsa_crt(struct ap_perms *perms,
 734                            struct ica_rsa_modexpo_crt *crt)
 735 {
 736         struct zcrypt_card *zc, *pref_zc;
 737         struct zcrypt_queue *zq, *pref_zq;
 738         unsigned int weight, pref_weight;
 739         unsigned int func_code;
 740         int qid = 0, rc = -ENODEV;
 741         struct module *mod;
 742
 743         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
 744
 745         if (crt->outputdatalength < crt->inputdatalength) {
 746                 func_code = 0;
 747                 rc = -EINVAL;
 748                 goto out;
 749         }
 750
 751         /*
 752          * As long as outputdatalength is big enough, we can set the
 753          * outputdatalength equal to the inputdatalength, since that is the
 754          * number of bytes we will copy in any case
 755          */
 756         crt->outputdatalength = crt->inputdatalength;
 757
 758         rc = get_rsa_crt_fc(crt, &func_code);
 759         if (rc)
 760                 goto out;
 761
 762         pref_zc = NULL;
 763         pref_zq = NULL;
 764         spin_lock(&zcrypt_list_lock);
 765         for_each_zcrypt_card(zc) {
 766                 /* Check for online accelarator and CCA cards */
 767                 if (!zc->online || !(zc->card->functions & 0x18000000))
 768                         continue;
 769                 /* Check for size limits */
 770                 if (zc->min_mod_size > crt->inputdatalength ||
 771                     zc->max_mod_size < crt->inputdatalength)
 772                         continue;
 773                 /* check if device node has admission for this card */
 774                 if (!zcrypt_check_card(perms, zc->card->id))
 775                         continue;
 776                 /* get weight index of the card device  */
 777                 weight = zc->speed_rating[func_code];
 778                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 779                         continue;
 780                 for_each_zcrypt_queue(zq, zc) {
 781                         /* check if device is online and eligible */
 782                         if (!zq->online || !zq->ops->rsa_modexpo_crt)
 783                                 continue;
 784                         /* check if device node has admission for this queue */
 785                         if (!zcrypt_check_queue(perms,
 786                                                 AP_QID_QUEUE(zq->queue->qid)))
 787                                 continue;
 788                         if (zcrypt_queue_compare(zq, pref_zq,
 789                                                  weight, pref_weight))
 790                                 continue;
 791                         pref_zc = zc;
 792                         pref_zq = zq;
 793                         pref_weight = weight;
 794                 }
 795         }
 796         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 797         spin_unlock(&zcrypt_list_lock);
 798
 799         if (!pref_zq) {
 800                 rc = -ENODEV;
 801                 goto out;
 802         }
 803
 804         qid = pref_zq->queue->qid;
 805         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
 806
 807         spin_lock(&zcrypt_list_lock);
 808         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 809         spin_unlock(&zcrypt_list_lock);
 810
 811 out:
 812         trace_s390_zcrypt_rep(crt, func_code, rc,
 813                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 814         return rc;
 815 }
 816
 817 static long _zcrypt_send_cprb(struct ap_perms *perms,
 818                               struct ica_xcRB *xcRB)
 819 {
 820         struct zcrypt_card *zc, *pref_zc;
 821         struct zcrypt_queue *zq, *pref_zq;
 822         struct ap_message ap_msg;
 823         unsigned int weight, pref_weight;
 824         unsigned int func_code;
 825         unsigned short *domain, tdom;
 826         int qid = 0, rc = -ENODEV;
 827         struct module *mod;
 828
 829         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
 830
 831         xcRB->status = 0;
 832         ap_init_message(&ap_msg);
 833         rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
 834         if (rc)
 835                 goto out;
 836
 837         /*
 838          * If a valid target domain is set and this domain is NOT a usage
 839          * domain but a control only domain, use the default domain as target.
 840          */
 841         tdom = *domain;
 842         if (tdom >= 0 && tdom < AP_DOMAINS &&
 843             !ap_test_config_usage_domain(tdom) &&
 844             ap_test_config_ctrl_domain(tdom) &&
 845             ap_domain_index >= 0)
 846                 tdom = ap_domain_index;
 847
 848         pref_zc = NULL;
 849         pref_zq = NULL;
 850         spin_lock(&zcrypt_list_lock);
 851         for_each_zcrypt_card(zc) {
 852                 /* Check for online CCA cards */
 853                 if (!zc->online || !(zc->card->functions & 0x10000000))
 854                         continue;
 855                 /* Check for user selected CCA card */
 856                 if (xcRB->user_defined != AUTOSELECT &&
 857                     xcRB->user_defined != zc->card->id)
 858                         continue;
 859                 /* check if device node has admission for this card */
 860                 if (!zcrypt_check_card(perms, zc->card->id))
 861                         continue;
 862                 /* get weight index of the card device  */
 863                 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 864                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 865                         continue;
 866                 for_each_zcrypt_queue(zq, zc) {
 867                         /* check if device is online and eligible */
 868                         if (!zq->online ||
 869                             !zq->ops->send_cprb ||
 870                             (tdom != (unsigned short) AUTOSELECT &&
 871                              tdom != AP_QID_QUEUE(zq->queue->qid)))
 872                                 continue;
 873                         /* check if device node has admission for this queue */
 874                         if (!zcrypt_check_queue(perms,
 875                                                 AP_QID_QUEUE(zq->queue->qid)))
 876                                 continue;
 877                         if (zcrypt_queue_compare(zq, pref_zq,
 878                                                  weight, pref_weight))
 879                                 continue;
 880                         pref_zc = zc;
 881                         pref_zq = zq;
 882                         pref_weight = weight;
 883                 }
 884         }
 885         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 886         spin_unlock(&zcrypt_list_lock);
 887
 888         if (!pref_zq) {
 889                 rc = -ENODEV;
 890                 goto out;
 891         }
 892
 893         /* in case of auto select, provide the correct domain */
 894         qid = pref_zq->queue->qid;
 895         if (*domain == (unsigned short) AUTOSELECT)
 896                 *domain = AP_QID_QUEUE(qid);
 897
 898         rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
 899
 900         spin_lock(&zcrypt_list_lock);
 901         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 902         spin_unlock(&zcrypt_list_lock);
 903
 904 out:
 905         ap_release_message(&ap_msg);
 906         trace_s390_zcrypt_rep(xcRB, func_code, rc,
 907                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 908         return rc;
 909 }
 910
 911 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
 912 {
 913         return _zcrypt_send_cprb(&ap_perms, xcRB);
 914 }
 915 EXPORT_SYMBOL(zcrypt_send_cprb);
 916
 917 static bool is_desired_ep11_card(unsigned int dev_id,
 918                                  unsigned short target_num,
 919                                  struct ep11_target_dev *targets)
 920 {
 921         while (target_num-- > 0) {
 922                 if (dev_id == targets->ap_id)
 923                         return true;
 924                 targets++;
 925         }
 926         return false;
 927 }
 928
 929 static bool is_desired_ep11_queue(unsigned int dev_qid,
 930                                   unsigned short target_num,
 931                                   struct ep11_target_dev *targets)
 932 {
 933         while (target_num-- > 0) {
 934                 if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
 935                         return true;
 936                 targets++;
 937         }
 938         return false;
 939 }
 940
 941 static long zcrypt_send_ep11_cprb(struct ap_perms *perms,
 942                                   struct ep11_urb *xcrb)
 943 {
 944         struct zcrypt_card *zc, *pref_zc;
 945         struct zcrypt_queue *zq, *pref_zq;
 946         struct ep11_target_dev *targets;
 947         unsigned short target_num;
 948         unsigned int weight, pref_weight;
 949         unsigned int func_code;
 950         struct ap_message ap_msg;
 951         int qid = 0, rc = -ENODEV;
 952         struct module *mod;
 953
 954         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
 955
 956         ap_init_message(&ap_msg);
 957
 958         target_num = (unsigned short) xcrb->targets_num;
 959
 960         /* empty list indicates autoselect (all available targets) */
 961         targets = NULL;
 962         if (target_num != 0) {
 963                 struct ep11_target_dev __user *uptr;
 964
 965                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
 966                 if (!targets) {
 967                         func_code = 0;
 968                         rc = -ENOMEM;
 969                         goto out;
 970                 }
 971
 972                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
 973                 if (copy_from_user(targets, uptr,
 974                                    target_num * sizeof(*targets))) {
 975                         func_code = 0;
 976                         rc = -EFAULT;
 977                         goto out_free;
 978                 }
 979         }
 980
 981         rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
 982         if (rc)
 983                 goto out_free;
 984
 985         pref_zc = NULL;
 986         pref_zq = NULL;
 987         spin_lock(&zcrypt_list_lock);
 988         for_each_zcrypt_card(zc) {
 989                 /* Check for online EP11 cards */
 990                 if (!zc->online || !(zc->card->functions & 0x04000000))
 991                         continue;
 992                 /* Check for user selected EP11 card */
 993                 if (targets &&
 994                     !is_desired_ep11_card(zc->card->id, target_num, targets))
 995                         continue;
 996                 /* check if device node has admission for this card */
 997                 if (!zcrypt_check_card(perms, zc->card->id))
 998                         continue;
 999                 /* get weight index of the card device  */
1000                 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1001                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1002                         continue;
1003                 for_each_zcrypt_queue(zq, zc) {
1004                         /* check if device is online and eligible */
1005                         if (!zq->online ||
1006                             !zq->ops->send_ep11_cprb ||
1007                             (targets &&
1008                              !is_desired_ep11_queue(zq->queue->qid,
1009                                                     target_num, targets)))
1010                                 continue;
1011                         /* check if device node has admission for this queue */
1012                         if (!zcrypt_check_queue(perms,
1013                                                 AP_QID_QUEUE(zq->queue->qid)))
1014                                 continue;
1015                         if (zcrypt_queue_compare(zq, pref_zq,
1016                                                  weight, pref_weight))
1017                                 continue;
1018                         pref_zc = zc;
1019                         pref_zq = zq;
1020                         pref_weight = weight;
1021                 }
1022         }
1023         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1024         spin_unlock(&zcrypt_list_lock);
1025
1026         if (!pref_zq) {
1027                 rc = -ENODEV;
1028                 goto out_free;
1029         }
1030
1031         qid = pref_zq->queue->qid;
1032         rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
1033
1034         spin_lock(&zcrypt_list_lock);
1035         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1036         spin_unlock(&zcrypt_list_lock);
1037
1038 out_free:
1039         kfree(targets);
1040 out:
1041         ap_release_message(&ap_msg);
1042         trace_s390_zcrypt_rep(xcrb, func_code, rc,
1043                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1044         return rc;
1045 }
1046
1047 static long zcrypt_rng(char *buffer)
1048 {
1049         struct zcrypt_card *zc, *pref_zc;
1050         struct zcrypt_queue *zq, *pref_zq;
1051         unsigned int weight, pref_weight;
1052         unsigned int func_code;
1053         struct ap_message ap_msg;
1054         unsigned int domain;
1055         int qid = 0, rc = -ENODEV;
1056         struct module *mod;
1057
1058         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1059
1060         ap_init_message(&ap_msg);
1061         rc = get_rng_fc(&ap_msg, &func_code, &domain);
1062         if (rc)
1063                 goto out;
1064
1065         pref_zc = NULL;
1066         pref_zq = NULL;
1067         spin_lock(&zcrypt_list_lock);
1068         for_each_zcrypt_card(zc) {
1069                 /* Check for online CCA cards */
1070                 if (!zc->online || !(zc->card->functions & 0x10000000))
1071                         continue;
1072                 /* get weight index of the card device  */
1073                 weight = zc->speed_rating[func_code];
1074                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1075                         continue;
1076                 for_each_zcrypt_queue(zq, zc) {
1077                         /* check if device is online and eligible */
1078                         if (!zq->online || !zq->ops->rng)
1079                                 continue;
1080                         if (zcrypt_queue_compare(zq, pref_zq,
1081                                                  weight, pref_weight))
1082                                 continue;
1083                         pref_zc = zc;
1084                         pref_zq = zq;
1085                         pref_weight = weight;
1086                 }
1087         }
1088         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1089         spin_unlock(&zcrypt_list_lock);
1090
1091         if (!pref_zq) {
1092                 rc = -ENODEV;
1093                 goto out;
1094         }
1095
1096         qid = pref_zq->queue->qid;
1097         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1098
1099         spin_lock(&zcrypt_list_lock);
1100         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1101         spin_unlock(&zcrypt_list_lock);
1102
1103 out:
1104         ap_release_message(&ap_msg);
1105         trace_s390_zcrypt_rep(buffer, func_code, rc,
1106                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1107         return rc;
1108 }
1109
1110 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1111 {
1112         struct zcrypt_card *zc;
1113         struct zcrypt_queue *zq;
1114         struct zcrypt_device_status *stat;
1115         int card, queue;
1116
1117         memset(devstatus, 0, MAX_ZDEV_ENTRIES
1118                * sizeof(struct zcrypt_device_status));
1119
1120         spin_lock(&zcrypt_list_lock);
1121         for_each_zcrypt_card(zc) {
1122                 for_each_zcrypt_queue(zq, zc) {
1123                         card = AP_QID_CARD(zq->queue->qid);
1124                         if (card >= MAX_ZDEV_CARDIDS)
1125                                 continue;
1126                         queue = AP_QID_QUEUE(zq->queue->qid);
1127                         stat = &devstatus[card * AP_DOMAINS + queue];
1128                         stat->hwtype = zc->card->ap_dev.device_type;
1129                         stat->functions = zc->card->functions >> 26;
1130                         stat->qid = zq->queue->qid;
1131                         stat->online = zq->online ? 0x01 : 0x00;
1132                 }
1133         }
1134         spin_unlock(&zcrypt_list_lock);
1135 }
1136
1137 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1138 {
1139         struct zcrypt_card *zc;
1140         struct zcrypt_queue *zq;
1141         struct zcrypt_device_status_ext *stat;
1142         int card, queue;
1143
1144         memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1145                * sizeof(struct zcrypt_device_status_ext));
1146
1147         spin_lock(&zcrypt_list_lock);
1148         for_each_zcrypt_card(zc) {
1149                 for_each_zcrypt_queue(zq, zc) {
1150                         card = AP_QID_CARD(zq->queue->qid);
1151                         queue = AP_QID_QUEUE(zq->queue->qid);
1152                         stat = &devstatus[card * AP_DOMAINS + queue];
1153                         stat->hwtype = zc->card->ap_dev.device_type;
1154                         stat->functions = zc->card->functions >> 26;
1155                         stat->qid = zq->queue->qid;
1156                         stat->online = zq->online ? 0x01 : 0x00;
1157                 }
1158         }
1159         spin_unlock(&zcrypt_list_lock);
1160 }
1161 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1162
1163 static void zcrypt_status_mask(char status[], size_t max_adapters)
1164 {
1165         struct zcrypt_card *zc;
1166         struct zcrypt_queue *zq;
1167         int card;
1168
1169         memset(status, 0, max_adapters);
1170         spin_lock(&zcrypt_list_lock);
1171         for_each_zcrypt_card(zc) {
1172                 for_each_zcrypt_queue(zq, zc) {
1173                         card = AP_QID_CARD(zq->queue->qid);
1174                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1175                             || card >= max_adapters)
1176                                 continue;
1177                         status[card] = zc->online ? zc->user_space_type : 0x0d;
1178                 }
1179         }
1180         spin_unlock(&zcrypt_list_lock);
1181 }
1182
1183 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1184 {
1185         struct zcrypt_card *zc;
1186         struct zcrypt_queue *zq;
1187         int card;
1188
1189         memset(qdepth, 0, max_adapters);
1190         spin_lock(&zcrypt_list_lock);
1191         local_bh_disable();
1192         for_each_zcrypt_card(zc) {
1193                 for_each_zcrypt_queue(zq, zc) {
1194                         card = AP_QID_CARD(zq->queue->qid);
1195                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1196                             || card >= max_adapters)
1197                                 continue;
1198                         spin_lock(&zq->queue->lock);
1199                         qdepth[card] =
1200                                 zq->queue->pendingq_count +
1201                                 zq->queue->requestq_count;
1202                         spin_unlock(&zq->queue->lock);
1203                 }
1204         }
1205         local_bh_enable();
1206         spin_unlock(&zcrypt_list_lock);
1207 }
1208
1209 static void zcrypt_perdev_reqcnt(int reqcnt[], size_t max_adapters)
1210 {
1211         struct zcrypt_card *zc;
1212         struct zcrypt_queue *zq;
1213         int card;
1214
1215         memset(reqcnt, 0, sizeof(int) * max_adapters);
1216         spin_lock(&zcrypt_list_lock);
1217         local_bh_disable();
1218         for_each_zcrypt_card(zc) {
1219                 for_each_zcrypt_queue(zq, zc) {
1220                         card = AP_QID_CARD(zq->queue->qid);
1221                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1222                             || card >= max_adapters)
1223                                 continue;
1224                         spin_lock(&zq->queue->lock);
1225                         reqcnt[card] = zq->queue->total_request_count;
1226                         spin_unlock(&zq->queue->lock);
1227                 }
1228         }
1229         local_bh_enable();
1230         spin_unlock(&zcrypt_list_lock);
1231 }
1232
1233 static int zcrypt_pendingq_count(void)
1234 {
1235         struct zcrypt_card *zc;
1236         struct zcrypt_queue *zq;
1237         int pendingq_count;
1238
1239         pendingq_count = 0;
1240         spin_lock(&zcrypt_list_lock);
1241         local_bh_disable();
1242         for_each_zcrypt_card(zc) {
1243                 for_each_zcrypt_queue(zq, zc) {
1244                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1245                                 continue;
1246                         spin_lock(&zq->queue->lock);
1247                         pendingq_count += zq->queue->pendingq_count;
1248                         spin_unlock(&zq->queue->lock);
1249                 }
1250         }
1251         local_bh_enable();
1252         spin_unlock(&zcrypt_list_lock);
1253         return pendingq_count;
1254 }
1255
1256 static int zcrypt_requestq_count(void)
1257 {
1258         struct zcrypt_card *zc;
1259         struct zcrypt_queue *zq;
1260         int requestq_count;
1261
1262         requestq_count = 0;
1263         spin_lock(&zcrypt_list_lock);
1264         local_bh_disable();
1265         for_each_zcrypt_card(zc) {
1266                 for_each_zcrypt_queue(zq, zc) {
1267                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1268                                 continue;
1269                         spin_lock(&zq->queue->lock);
1270                         requestq_count += zq->queue->requestq_count;
1271                         spin_unlock(&zq->queue->lock);
1272                 }
1273         }
1274         local_bh_enable();
1275         spin_unlock(&zcrypt_list_lock);
1276         return requestq_count;
1277 }
1278
1279 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1280                                   unsigned long arg)
1281 {
1282         int rc;
1283         struct ap_perms *perms =
1284                 (struct ap_perms *) filp->private_data;
1285
1286         rc = zcrypt_check_ioctl(perms, cmd);
1287         if (rc)
1288                 return rc;
1289
1290         switch (cmd) {
1291         case ICARSAMODEXPO: {
1292                 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1293                 struct ica_rsa_modexpo mex;
1294
1295                 if (copy_from_user(&mex, umex, sizeof(mex)))
1296                         return -EFAULT;
1297                 do {
1298                         rc = zcrypt_rsa_modexpo(perms, &mex);
1299                 } while (rc == -EAGAIN);
1300                 /* on failure: retry once again after a requested rescan */
1301                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1302                         do {
1303                                 rc = zcrypt_rsa_modexpo(perms, &mex);
1304                         } while (rc == -EAGAIN);
1305                 if (rc) {
1306                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1307                         return rc;
1308                 }
1309                 return put_user(mex.outputdatalength, &umex->outputdatalength);
1310         }
1311         case ICARSACRT: {
1312                 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1313                 struct ica_rsa_modexpo_crt crt;
1314
1315                 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1316                         return -EFAULT;
1317                 do {
1318                         rc = zcrypt_rsa_crt(perms, &crt);
1319                 } while (rc == -EAGAIN);
1320                 /* on failure: retry once again after a requested rescan */
1321                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1322                         do {
1323                                 rc = zcrypt_rsa_crt(perms, &crt);
1324                         } while (rc == -EAGAIN);
1325                 if (rc) {
1326                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1327                         return rc;
1328                 }
1329                 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1330         }
1331         case ZSECSENDCPRB: {
1332                 struct ica_xcRB __user *uxcRB = (void __user *) arg;
1333                 struct ica_xcRB xcRB;
1334
1335                 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1336                         return -EFAULT;
1337                 do {
1338                         rc = _zcrypt_send_cprb(perms, &xcRB);
1339                 } while (rc == -EAGAIN);
1340                 /* on failure: retry once again after a requested rescan */
1341                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1342                         do {
1343                                 rc = _zcrypt_send_cprb(perms, &xcRB);
1344                         } while (rc == -EAGAIN);
1345                 if (rc)
1346                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1347                                    rc, xcRB.status);
1348                 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1349                         return -EFAULT;
1350                 return rc;
1351         }
1352         case ZSENDEP11CPRB: {
1353                 struct ep11_urb __user *uxcrb = (void __user *)arg;
1354                 struct ep11_urb xcrb;
1355
1356                 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1357                         return -EFAULT;
1358                 do {
1359                         rc = zcrypt_send_ep11_cprb(perms, &xcrb);
1360                 } while (rc == -EAGAIN);
1361                 /* on failure: retry once again after a requested rescan */
1362                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1363                         do {
1364                                 rc = zcrypt_send_ep11_cprb(perms, &xcrb);
1365                         } while (rc == -EAGAIN);
1366                 if (rc)
1367                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1368                 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1369                         return -EFAULT;
1370                 return rc;
1371         }
1372         case ZCRYPT_DEVICE_STATUS: {
1373                 struct zcrypt_device_status_ext *device_status;
1374                 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1375                         * sizeof(struct zcrypt_device_status_ext);
1376
1377                 device_status = kzalloc(total_size, GFP_KERNEL);
1378                 if (!device_status)
1379                         return -ENOMEM;
1380                 zcrypt_device_status_mask_ext(device_status);
1381                 if (copy_to_user((char __user *) arg, device_status,
1382                                  total_size))
1383                         rc = -EFAULT;
1384                 kfree(device_status);
1385                 return rc;
1386         }
1387         case ZCRYPT_STATUS_MASK: {
1388                 char status[AP_DEVICES];
1389
1390                 zcrypt_status_mask(status, AP_DEVICES);
1391                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1392                         return -EFAULT;
1393                 return 0;
1394         }
1395         case ZCRYPT_QDEPTH_MASK: {
1396                 char qdepth[AP_DEVICES];
1397
1398                 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1399                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1400                         return -EFAULT;
1401                 return 0;
1402         }
1403         case ZCRYPT_PERDEV_REQCNT: {
1404                 int *reqcnt;
1405
1406                 reqcnt = kcalloc(AP_DEVICES, sizeof(int), GFP_KERNEL);
1407                 if (!reqcnt)
1408                         return -ENOMEM;
1409                 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1410                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1411                         rc = -EFAULT;
1412                 kfree(reqcnt);
1413                 return rc;
1414         }
1415         case Z90STAT_REQUESTQ_COUNT:
1416                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1417         case Z90STAT_PENDINGQ_COUNT:
1418                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1419         case Z90STAT_TOTALOPEN_COUNT:
1420                 return put_user(atomic_read(&zcrypt_open_count),
1421                                 (int __user *) arg);
1422         case Z90STAT_DOMAIN_INDEX:
1423                 return put_user(ap_domain_index, (int __user *) arg);
1424         /*
1425          * Deprecated ioctls
1426          */
1427         case ZDEVICESTATUS: {
1428                 /* the old ioctl supports only 64 adapters */
1429                 struct zcrypt_device_status *device_status;
1430                 size_t total_size = MAX_ZDEV_ENTRIES
1431                         * sizeof(struct zcrypt_device_status);
1432
1433                 device_status = kzalloc(total_size, GFP_KERNEL);
1434                 if (!device_status)
1435                         return -ENOMEM;
1436                 zcrypt_device_status_mask(device_status);
1437                 if (copy_to_user((char __user *) arg, device_status,
1438                                  total_size))
1439                         rc = -EFAULT;
1440                 kfree(device_status);
1441                 return rc;
1442         }
1443         case Z90STAT_STATUS_MASK: {
1444                 /* the old ioctl supports only 64 adapters */
1445                 char status[MAX_ZDEV_CARDIDS];
1446
1447                 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1448                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1449                         return -EFAULT;
1450                 return 0;
1451         }
1452         case Z90STAT_QDEPTH_MASK: {
1453                 /* the old ioctl supports only 64 adapters */
1454                 char qdepth[MAX_ZDEV_CARDIDS];
1455
1456                 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1457                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1458                         return -EFAULT;
1459                 return 0;
1460         }
1461         case Z90STAT_PERDEV_REQCNT: {
1462                 /* the old ioctl supports only 64 adapters */
1463                 int reqcnt[MAX_ZDEV_CARDIDS];
1464
1465                 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1466                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1467                         return -EFAULT;
1468                 return 0;
1469         }
1470         /* unknown ioctl number */
1471         default:
1472                 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1473                 return -ENOIOCTLCMD;
1474         }
1475 }
1476
1477 #ifdef CONFIG_COMPAT
1478 /*
1479  * ioctl32 conversion routines
1480  */
1481 struct compat_ica_rsa_modexpo {
1482         compat_uptr_t   inputdata;
1483         unsigned int    inputdatalength;
1484         compat_uptr_t   outputdata;
1485         unsigned int    outputdatalength;
1486         compat_uptr_t   b_key;
1487         compat_uptr_t   n_modulus;
1488 };
1489
1490 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1491                             unsigned int cmd, unsigned long arg)
1492 {
1493         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1494         struct compat_ica_rsa_modexpo mex32;
1495         struct ica_rsa_modexpo mex64;
1496         long rc;
1497
1498         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1499                 return -EFAULT;
1500         mex64.inputdata = compat_ptr(mex32.inputdata);
1501         mex64.inputdatalength = mex32.inputdatalength;
1502         mex64.outputdata = compat_ptr(mex32.outputdata);
1503         mex64.outputdatalength = mex32.outputdatalength;
1504         mex64.b_key = compat_ptr(mex32.b_key);
1505         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1506         do {
1507                 rc = zcrypt_rsa_modexpo(perms, &mex64);
1508         } while (rc == -EAGAIN);
1509         /* on failure: retry once again after a requested rescan */
1510         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1511                 do {
1512                         rc = zcrypt_rsa_modexpo(perms, &mex64);
1513                 } while (rc == -EAGAIN);
1514         if (rc)
1515                 return rc;
1516         return put_user(mex64.outputdatalength,
1517                         &umex32->outputdatalength);
1518 }
1519
1520 struct compat_ica_rsa_modexpo_crt {
1521         compat_uptr_t   inputdata;
1522         unsigned int    inputdatalength;
1523         compat_uptr_t   outputdata;
1524         unsigned int    outputdatalength;
1525         compat_uptr_t   bp_key;
1526         compat_uptr_t   bq_key;
1527         compat_uptr_t   np_prime;
1528         compat_uptr_t   nq_prime;
1529         compat_uptr_t   u_mult_inv;
1530 };
1531
1532 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1533                                 unsigned int cmd, unsigned long arg)
1534 {
1535         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1536         struct compat_ica_rsa_modexpo_crt crt32;
1537         struct ica_rsa_modexpo_crt crt64;
1538         long rc;
1539
1540         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1541                 return -EFAULT;
1542         crt64.inputdata = compat_ptr(crt32.inputdata);
1543         crt64.inputdatalength = crt32.inputdatalength;
1544         crt64.outputdata = compat_ptr(crt32.outputdata);
1545         crt64.outputdatalength = crt32.outputdatalength;
1546         crt64.bp_key = compat_ptr(crt32.bp_key);
1547         crt64.bq_key = compat_ptr(crt32.bq_key);
1548         crt64.np_prime = compat_ptr(crt32.np_prime);
1549         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1550         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1551         do {
1552                 rc = zcrypt_rsa_crt(perms, &crt64);
1553         } while (rc == -EAGAIN);
1554         /* on failure: retry once again after a requested rescan */
1555         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1556                 do {
1557                         rc = zcrypt_rsa_crt(perms, &crt64);
1558                 } while (rc == -EAGAIN);
1559         if (rc)
1560                 return rc;
1561         return put_user(crt64.outputdatalength,
1562                         &ucrt32->outputdatalength);
1563 }
1564
1565 struct compat_ica_xcRB {
1566         unsigned short  agent_ID;
1567         unsigned int    user_defined;
1568         unsigned short  request_ID;
1569         unsigned int    request_control_blk_length;
1570         unsigned char   padding1[16 - sizeof(compat_uptr_t)];
1571         compat_uptr_t   request_control_blk_addr;
1572         unsigned int    request_data_length;
1573         char            padding2[16 - sizeof(compat_uptr_t)];
1574         compat_uptr_t   request_data_address;
1575         unsigned int    reply_control_blk_length;
1576         char            padding3[16 - sizeof(compat_uptr_t)];
1577         compat_uptr_t   reply_control_blk_addr;
1578         unsigned int    reply_data_length;
1579         char            padding4[16 - sizeof(compat_uptr_t)];
1580         compat_uptr_t   reply_data_addr;
1581         unsigned short  priority_window;
1582         unsigned int    status;
1583 } __packed;
1584
1585 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1586                          unsigned int cmd, unsigned long arg)
1587 {
1588         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1589         struct compat_ica_xcRB xcRB32;
1590         struct ica_xcRB xcRB64;
1591         long rc;
1592
1593         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1594                 return -EFAULT;
1595         xcRB64.agent_ID = xcRB32.agent_ID;
1596         xcRB64.user_defined = xcRB32.user_defined;
1597         xcRB64.request_ID = xcRB32.request_ID;
1598         xcRB64.request_control_blk_length =
1599                 xcRB32.request_control_blk_length;
1600         xcRB64.request_control_blk_addr =
1601                 compat_ptr(xcRB32.request_control_blk_addr);
1602         xcRB64.request_data_length =
1603                 xcRB32.request_data_length;
1604         xcRB64.request_data_address =
1605                 compat_ptr(xcRB32.request_data_address);
1606         xcRB64.reply_control_blk_length =
1607                 xcRB32.reply_control_blk_length;
1608         xcRB64.reply_control_blk_addr =
1609                 compat_ptr(xcRB32.reply_control_blk_addr);
1610         xcRB64.reply_data_length = xcRB32.reply_data_length;
1611         xcRB64.reply_data_addr =
1612                 compat_ptr(xcRB32.reply_data_addr);
1613         xcRB64.priority_window = xcRB32.priority_window;
1614         xcRB64.status = xcRB32.status;
1615         do {
1616                 rc = _zcrypt_send_cprb(perms, &xcRB64);
1617         } while (rc == -EAGAIN);
1618         /* on failure: retry once again after a requested rescan */
1619         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1620                 do {
1621                         rc = _zcrypt_send_cprb(perms, &xcRB64);
1622                 } while (rc == -EAGAIN);
1623         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1624         xcRB32.reply_data_length = xcRB64.reply_data_length;
1625         xcRB32.status = xcRB64.status;
1626         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1627                 return -EFAULT;
1628         return rc;
1629 }
1630
1631 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1632                          unsigned long arg)
1633 {
1634         int rc;
1635         struct ap_perms *perms =
1636                 (struct ap_perms *) filp->private_data;
1637
1638         rc = zcrypt_check_ioctl(perms, cmd);
1639         if (rc)
1640                 return rc;
1641
1642         if (cmd == ICARSAMODEXPO)
1643                 return trans_modexpo32(perms, filp, cmd, arg);
1644         if (cmd == ICARSACRT)
1645                 return trans_modexpo_crt32(perms, filp, cmd, arg);
1646         if (cmd == ZSECSENDCPRB)
1647                 return trans_xcRB32(perms, filp, cmd, arg);
1648         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1649 }
1650 #endif
1651
1652 /*
1653  * Misc device file operations.
1654  */
1655 static const struct file_operations zcrypt_fops = {
1656         .owner          = THIS_MODULE,
1657         .read           = zcrypt_read,
1658         .write          = zcrypt_write,
1659         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1660 #ifdef CONFIG_COMPAT
1661         .compat_ioctl   = zcrypt_compat_ioctl,
1662 #endif
1663         .open           = zcrypt_open,
1664         .release        = zcrypt_release,
1665         .llseek         = no_llseek,
1666 };
1667
1668 /*
1669  * Misc device.
1670  */
1671 static struct miscdevice zcrypt_misc_device = {
1672         .minor      = MISC_DYNAMIC_MINOR,
1673         .name       = "z90crypt",
1674         .fops       = &zcrypt_fops,
1675 };
1676
1677 static int zcrypt_rng_device_count;
1678 static u32 *zcrypt_rng_buffer;
1679 static int zcrypt_rng_buffer_index;
1680 static DEFINE_MUTEX(zcrypt_rng_mutex);
1681
1682 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1683 {
1684         int rc;
1685
1686         /*
1687          * We don't need locking here because the RNG API guarantees serialized
1688          * read method calls.
1689          */
1690         if (zcrypt_rng_buffer_index == 0) {
1691                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1692                 /* on failure: retry once again after a requested rescan */
1693                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1694                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1695                 if (rc < 0)
1696                         return -EIO;
1697                 zcrypt_rng_buffer_index = rc / sizeof(*data);
1698         }
1699         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1700         return sizeof(*data);
1701 }
1702
1703 static struct hwrng zcrypt_rng_dev = {
1704         .name           = "zcrypt",
1705         .data_read      = zcrypt_rng_data_read,
1706         .quality        = 990,
1707 };
1708
1709 int zcrypt_rng_device_add(void)
1710 {
1711         int rc = 0;
1712
1713         mutex_lock(&zcrypt_rng_mutex);
1714         if (zcrypt_rng_device_count == 0) {
1715                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1716                 if (!zcrypt_rng_buffer) {
1717                         rc = -ENOMEM;
1718                         goto out;
1719                 }
1720                 zcrypt_rng_buffer_index = 0;
1721                 if (!zcrypt_hwrng_seed)
1722                         zcrypt_rng_dev.quality = 0;
1723                 rc = hwrng_register(&zcrypt_rng_dev);
1724                 if (rc)
1725                         goto out_free;
1726                 zcrypt_rng_device_count = 1;
1727         } else
1728                 zcrypt_rng_device_count++;
1729         mutex_unlock(&zcrypt_rng_mutex);
1730         return 0;
1731
1732 out_free:
1733         free_page((unsigned long) zcrypt_rng_buffer);
1734 out:
1735         mutex_unlock(&zcrypt_rng_mutex);
1736         return rc;
1737 }
1738
1739 void zcrypt_rng_device_remove(void)
1740 {
1741         mutex_lock(&zcrypt_rng_mutex);
1742         zcrypt_rng_device_count--;
1743         if (zcrypt_rng_device_count == 0) {
1744                 hwrng_unregister(&zcrypt_rng_dev);
1745                 free_page((unsigned long) zcrypt_rng_buffer);
1746         }
1747         mutex_unlock(&zcrypt_rng_mutex);
1748 }
1749
1750 int __init zcrypt_debug_init(void)
1751 {
1752         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1753                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
1754         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1755         debug_set_level(zcrypt_dbf_info, DBF_ERR);
1756
1757         return 0;
1758 }
1759
1760 void zcrypt_debug_exit(void)
1761 {
1762         debug_unregister(zcrypt_dbf_info);
1763 }
1764
1765 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1766
1767 static int __init zcdn_init(void)
1768 {
1769         int rc;
1770
1771         /* create a new class 'zcrypt' */
1772         zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
1773         if (IS_ERR(zcrypt_class)) {
1774                 rc = PTR_ERR(zcrypt_class);
1775                 goto out_class_create_failed;
1776         }
1777         zcrypt_class->dev_release = zcdn_device_release;
1778
1779         /* alloc device minor range */
1780         rc = alloc_chrdev_region(&zcrypt_devt,
1781                                  0, ZCRYPT_MAX_MINOR_NODES,
1782                                  ZCRYPT_NAME);
1783         if (rc)
1784                 goto out_alloc_chrdev_failed;
1785
1786         cdev_init(&zcrypt_cdev, &zcrypt_fops);
1787         zcrypt_cdev.owner = THIS_MODULE;
1788         rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1789         if (rc)
1790                 goto out_cdev_add_failed;
1791
1792         /* need some class specific sysfs attributes */
1793         rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
1794         if (rc)
1795                 goto out_class_create_file_1_failed;
1796         rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
1797         if (rc)
1798                 goto out_class_create_file_2_failed;
1799
1800         return 0;
1801
1802 out_class_create_file_2_failed:
1803         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1804 out_class_create_file_1_failed:
1805         cdev_del(&zcrypt_cdev);
1806 out_cdev_add_failed:
1807         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1808 out_alloc_chrdev_failed:
1809         class_destroy(zcrypt_class);
1810 out_class_create_failed:
1811         return rc;
1812 }
1813
1814 static void zcdn_exit(void)
1815 {
1816         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1817         class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
1818         zcdn_destroy_all();
1819         cdev_del(&zcrypt_cdev);
1820         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1821         class_destroy(zcrypt_class);
1822 }
1823
1824 #endif
1825
1826 /**
1827  * zcrypt_api_init(): Module initialization.
1828  *
1829  * The module initialization code.
1830  */
1831 int __init zcrypt_api_init(void)
1832 {
1833         int rc;
1834
1835         rc = zcrypt_debug_init();
1836         if (rc)
1837                 goto out;
1838
1839 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1840         rc = zcdn_init();
1841         if (rc)
1842                 goto out;
1843 #endif
1844
1845         /* Register the request sprayer. */
1846         rc = misc_register(&zcrypt_misc_device);
1847         if (rc < 0)
1848                 goto out_misc_register_failed;
1849
1850         zcrypt_msgtype6_init();
1851         zcrypt_msgtype50_init();
1852
1853         return 0;
1854
1855 out_misc_register_failed:
1856 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1857         zcdn_exit();
1858 #endif
1859         zcrypt_debug_exit();
1860 out:
1861         return rc;
1862 }
1863
1864 /**
1865  * zcrypt_api_exit(): Module termination.
1866  *
1867  * The module termination code.
1868  */
1869 void __exit zcrypt_api_exit(void)
1870 {
1871 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1872         zcdn_exit();
1873 #endif
1874         misc_deregister(&zcrypt_misc_device);
1875         zcrypt_msgtype6_exit();
1876         zcrypt_msgtype50_exit();
1877         zcrypt_debug_exit();
1878 }
1879
1880 module_init(zcrypt_api_init);
1881 module_exit(zcrypt_api_exit);