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 #include "zcrypt_ccamisc.h"
  39
  40 /*
  41  * Module description.
  42  */
  43 MODULE_AUTHOR("IBM Corporation");
  44 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
  45                    "Copyright IBM Corp. 2001, 2012");
  46 MODULE_LICENSE("GPL");
  47
  48 /*
  49  * zcrypt tracepoint functions
  50  */
  51 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
  52 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
  53
  54 static int zcrypt_hwrng_seed = 1;
  55 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
  56 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
  57
  58 DEFINE_SPINLOCK(zcrypt_list_lock);
  59 LIST_HEAD(zcrypt_card_list);
  60 int zcrypt_device_count;
  61
  62 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
  63 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
  64
  65 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
  66 EXPORT_SYMBOL(zcrypt_rescan_req);
  67
  68 static LIST_HEAD(zcrypt_ops_list);
  69
  70 /* Zcrypt related debug feature stuff. */
  71 debug_info_t *zcrypt_dbf_info;
  72
  73 /**
  74  * Process a rescan of the transport layer.
  75  *
  76  * Returns 1, if the rescan has been processed, otherwise 0.
  77  */
  78 static inline int zcrypt_process_rescan(void)
  79 {
  80         if (atomic_read(&zcrypt_rescan_req)) {
  81                 atomic_set(&zcrypt_rescan_req, 0);
  82                 atomic_inc(&zcrypt_rescan_count);
  83                 ap_bus_force_rescan();
  84                 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
  85                            atomic_inc_return(&zcrypt_rescan_count));
  86                 return 1;
  87         }
  88         return 0;
  89 }
  90
  91 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
  92 {
  93         list_add_tail(&zops->list, &zcrypt_ops_list);
  94 }
  95
  96 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
  97 {
  98         list_del_init(&zops->list);
  99 }
 100
 101 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
 102 {
 103         struct zcrypt_ops *zops;
 104
 105         list_for_each_entry(zops, &zcrypt_ops_list, list)
 106                 if ((zops->variant == variant) &&
 107                     (!strncmp(zops->name, name, sizeof(zops->name))))
 108                         return zops;
 109         return NULL;
 110 }
 111 EXPORT_SYMBOL(zcrypt_msgtype);
 112
 113 /*
 114  * Multi device nodes extension functions.
 115  */
 116
 117 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 118
 119 struct zcdn_device;
 120
 121 static struct class *zcrypt_class;
 122 static dev_t zcrypt_devt;
 123 static struct cdev zcrypt_cdev;
 124
 125 struct zcdn_device {
 126         struct device device;
 127         struct ap_perms perms;
 128 };
 129
 130 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
 131
 132 #define ZCDN_MAX_NAME 32
 133
 134 static int zcdn_create(const char *name);
 135 static int zcdn_destroy(const char *name);
 136
 137 /* helper function, matches the name for find_zcdndev_by_name() */
 138 static int __match_zcdn_name(struct device *dev, const void *data)
 139 {
 140         return strcmp(dev_name(dev), (const char *)data) == 0;
 141 }
 142
 143 /* helper function, matches the devt value for find_zcdndev_by_devt() */
 144 static int __match_zcdn_devt(struct device *dev, const void *data)
 145 {
 146         return dev->devt == *((dev_t *) data);
 147 }
 148
 149 /*
 150  * Find zcdn device by name.
 151  * Returns reference to the zcdn device which needs to be released
 152  * with put_device() after use.
 153  */
 154 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
 155 {
 156         struct device *dev =
 157                 class_find_device(zcrypt_class, NULL,
 158                                   (void *) name,
 159                                   __match_zcdn_name);
 160
 161         return dev ? to_zcdn_dev(dev) : NULL;
 162 }
 163
 164 /*
 165  * Find zcdn device by devt value.
 166  * Returns reference to the zcdn device which needs to be released
 167  * with put_device() after use.
 168  */
 169 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
 170 {
 171         struct device *dev =
 172                 class_find_device(zcrypt_class, NULL,
 173                                   (void *) &devt,
 174                                   __match_zcdn_devt);
 175
 176         return dev ? to_zcdn_dev(dev) : NULL;
 177 }
 178
 179 static ssize_t ioctlmask_show(struct device *dev,
 180                               struct device_attribute *attr,
 181                               char *buf)
 182 {
 183         int i, rc;
 184         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 185
 186         if (mutex_lock_interruptible(&ap_perms_mutex))
 187                 return -ERESTARTSYS;
 188
 189         buf[0] = '0';
 190         buf[1] = 'x';
 191         for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
 192                 snprintf(buf + 2 + 2 * i * sizeof(long),
 193                          PAGE_SIZE - 2 - 2 * i * sizeof(long),
 194                          "%016lx", zcdndev->perms.ioctlm[i]);
 195         buf[2 + 2 * i * sizeof(long)] = '\n';
 196         buf[2 + 2 * i * sizeof(long) + 1] = '\0';
 197         rc = 2 + 2 * i * sizeof(long) + 1;
 198
 199         mutex_unlock(&ap_perms_mutex);
 200
 201         return rc;
 202 }
 203
 204 static ssize_t ioctlmask_store(struct device *dev,
 205                                struct device_attribute *attr,
 206                                const char *buf, size_t count)
 207 {
 208         int rc;
 209         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 210
 211         rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
 212                                AP_IOCTLS, &ap_perms_mutex);
 213         if (rc)
 214                 return rc;
 215
 216         return count;
 217 }
 218
 219 static DEVICE_ATTR_RW(ioctlmask);
 220
 221 static ssize_t apmask_show(struct device *dev,
 222                            struct device_attribute *attr,
 223                            char *buf)
 224 {
 225         int i, rc;
 226         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 227
 228         if (mutex_lock_interruptible(&ap_perms_mutex))
 229                 return -ERESTARTSYS;
 230
 231         buf[0] = '0';
 232         buf[1] = 'x';
 233         for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
 234                 snprintf(buf + 2 + 2 * i * sizeof(long),
 235                          PAGE_SIZE - 2 - 2 * i * sizeof(long),
 236                          "%016lx", zcdndev->perms.apm[i]);
 237         buf[2 + 2 * i * sizeof(long)] = '\n';
 238         buf[2 + 2 * i * sizeof(long) + 1] = '\0';
 239         rc = 2 + 2 * i * sizeof(long) + 1;
 240
 241         mutex_unlock(&ap_perms_mutex);
 242
 243         return rc;
 244 }
 245
 246 static ssize_t apmask_store(struct device *dev,
 247                             struct device_attribute *attr,
 248                             const char *buf, size_t count)
 249 {
 250         int rc;
 251         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 252
 253         rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
 254                                AP_DEVICES, &ap_perms_mutex);
 255         if (rc)
 256                 return rc;
 257
 258         return count;
 259 }
 260
 261 static DEVICE_ATTR_RW(apmask);
 262
 263 static ssize_t aqmask_show(struct device *dev,
 264                            struct device_attribute *attr,
 265                            char *buf)
 266 {
 267         int i, rc;
 268         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 269
 270         if (mutex_lock_interruptible(&ap_perms_mutex))
 271                 return -ERESTARTSYS;
 272
 273         buf[0] = '0';
 274         buf[1] = 'x';
 275         for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
 276                 snprintf(buf + 2 + 2 * i * sizeof(long),
 277                          PAGE_SIZE - 2 - 2 * i * sizeof(long),
 278                          "%016lx", zcdndev->perms.aqm[i]);
 279         buf[2 + 2 * i * sizeof(long)] = '\n';
 280         buf[2 + 2 * i * sizeof(long) + 1] = '\0';
 281         rc = 2 + 2 * i * sizeof(long) + 1;
 282
 283         mutex_unlock(&ap_perms_mutex);
 284
 285         return rc;
 286 }
 287
 288 static ssize_t aqmask_store(struct device *dev,
 289                             struct device_attribute *attr,
 290                             const char *buf, size_t count)
 291 {
 292         int rc;
 293         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 294
 295         rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
 296                                AP_DOMAINS, &ap_perms_mutex);
 297         if (rc)
 298                 return rc;
 299
 300         return count;
 301 }
 302
 303 static DEVICE_ATTR_RW(aqmask);
 304
 305 static struct attribute *zcdn_dev_attrs[] = {
 306         &dev_attr_ioctlmask.attr,
 307         &dev_attr_apmask.attr,
 308         &dev_attr_aqmask.attr,
 309         NULL
 310 };
 311
 312 static struct attribute_group zcdn_dev_attr_group = {
 313         .attrs = zcdn_dev_attrs
 314 };
 315
 316 static const struct attribute_group *zcdn_dev_attr_groups[] = {
 317         &zcdn_dev_attr_group,
 318         NULL
 319 };
 320
 321 static ssize_t zcdn_create_store(struct class *class,
 322                                  struct class_attribute *attr,
 323                                  const char *buf, size_t count)
 324 {
 325         int rc;
 326         char name[ZCDN_MAX_NAME];
 327
 328         strncpy(name, skip_spaces(buf), sizeof(name));
 329         name[sizeof(name) - 1] = '\0';
 330
 331         rc = zcdn_create(strim(name));
 332
 333         return rc ? rc : count;
 334 }
 335
 336 static const struct class_attribute class_attr_zcdn_create =
 337         __ATTR(create, 0600, NULL, zcdn_create_store);
 338
 339 static ssize_t zcdn_destroy_store(struct class *class,
 340                                   struct class_attribute *attr,
 341                                   const char *buf, size_t count)
 342 {
 343         int rc;
 344         char name[ZCDN_MAX_NAME];
 345
 346         strncpy(name, skip_spaces(buf), sizeof(name));
 347         name[sizeof(name) - 1] = '\0';
 348
 349         rc = zcdn_destroy(strim(name));
 350
 351         return rc ? rc : count;
 352 }
 353
 354 static const struct class_attribute class_attr_zcdn_destroy =
 355         __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
 356
 357 static void zcdn_device_release(struct device *dev)
 358 {
 359         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 360
 361         ZCRYPT_DBF(DBF_INFO, "releasing zcdn device %d:%d\n",
 362                    MAJOR(dev->devt), MINOR(dev->devt));
 363
 364         kfree(zcdndev);
 365 }
 366
 367 static int zcdn_create(const char *name)
 368 {
 369         dev_t devt;
 370         int i, rc = 0;
 371         char nodename[ZCDN_MAX_NAME];
 372         struct zcdn_device *zcdndev;
 373
 374         if (mutex_lock_interruptible(&ap_perms_mutex))
 375                 return -ERESTARTSYS;
 376
 377         /* check if device node with this name already exists */
 378         if (name[0]) {
 379                 zcdndev = find_zcdndev_by_name(name);
 380                 if (zcdndev) {
 381                         put_device(&zcdndev->device);
 382                         rc = -EEXIST;
 383                         goto unlockout;
 384                 }
 385         }
 386
 387         /* find an unused minor number */
 388         for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
 389                 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
 390                 zcdndev = find_zcdndev_by_devt(devt);
 391                 if (zcdndev)
 392                         put_device(&zcdndev->device);
 393                 else
 394                         break;
 395         }
 396         if (i == ZCRYPT_MAX_MINOR_NODES) {
 397                 rc = -ENOSPC;
 398                 goto unlockout;
 399         }
 400
 401         /* alloc and prepare a new zcdn device */
 402         zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
 403         if (!zcdndev) {
 404                 rc = -ENOMEM;
 405                 goto unlockout;
 406         }
 407         zcdndev->device.release = zcdn_device_release;
 408         zcdndev->device.class = zcrypt_class;
 409         zcdndev->device.devt = devt;
 410         zcdndev->device.groups = zcdn_dev_attr_groups;
 411         if (name[0])
 412                 strncpy(nodename, name, sizeof(nodename));
 413         else
 414                 snprintf(nodename, sizeof(nodename),
 415                          ZCRYPT_NAME "_%d", (int) MINOR(devt));
 416         nodename[sizeof(nodename)-1] = '\0';
 417         if (dev_set_name(&zcdndev->device, nodename)) {
 418                 rc = -EINVAL;
 419                 goto unlockout;
 420         }
 421         rc = device_register(&zcdndev->device);
 422         if (rc) {
 423                 put_device(&zcdndev->device);
 424                 goto unlockout;
 425         }
 426
 427         ZCRYPT_DBF(DBF_INFO, "created zcdn device %d:%d\n",
 428                    MAJOR(devt), MINOR(devt));
 429
 430 unlockout:
 431         mutex_unlock(&ap_perms_mutex);
 432         return rc;
 433 }
 434
 435 static int zcdn_destroy(const char *name)
 436 {
 437         int rc = 0;
 438         struct zcdn_device *zcdndev;
 439
 440         if (mutex_lock_interruptible(&ap_perms_mutex))
 441                 return -ERESTARTSYS;
 442
 443         /* try to find this zcdn device */
 444         zcdndev = find_zcdndev_by_name(name);
 445         if (!zcdndev) {
 446                 rc = -ENOENT;
 447                 goto unlockout;
 448         }
 449
 450         /*
 451          * The zcdn device is not hard destroyed. It is subject to
 452          * reference counting and thus just needs to be unregistered.
 453          */
 454         put_device(&zcdndev->device);
 455         device_unregister(&zcdndev->device);
 456
 457 unlockout:
 458         mutex_unlock(&ap_perms_mutex);
 459         return rc;
 460 }
 461
 462 static void zcdn_destroy_all(void)
 463 {
 464         int i;
 465         dev_t devt;
 466         struct zcdn_device *zcdndev;
 467
 468         mutex_lock(&ap_perms_mutex);
 469         for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
 470                 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
 471                 zcdndev = find_zcdndev_by_devt(devt);
 472                 if (zcdndev) {
 473                         put_device(&zcdndev->device);
 474                         device_unregister(&zcdndev->device);
 475                 }
 476         }
 477         mutex_unlock(&ap_perms_mutex);
 478 }
 479
 480 #endif
 481
 482 /**
 483  * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
 484  *
 485  * This function is not supported beyond zcrypt 1.3.1.
 486  */
 487 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
 488                            size_t count, loff_t *f_pos)
 489 {
 490         return -EPERM;
 491 }
 492
 493 /**
 494  * zcrypt_write(): Not allowed.
 495  *
 496  * Write is is not allowed
 497  */
 498 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
 499                             size_t count, loff_t *f_pos)
 500 {
 501         return -EPERM;
 502 }
 503
 504 /**
 505  * zcrypt_open(): Count number of users.
 506  *
 507  * Device open function to count number of users.
 508  */
 509 static int zcrypt_open(struct inode *inode, struct file *filp)
 510 {
 511         struct ap_perms *perms = &ap_perms;
 512
 513 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 514         if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 515                 struct zcdn_device *zcdndev;
 516
 517                 if (mutex_lock_interruptible(&ap_perms_mutex))
 518                         return -ERESTARTSYS;
 519                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 520                 /* find returns a reference, no get_device() needed */
 521                 mutex_unlock(&ap_perms_mutex);
 522                 if (zcdndev)
 523                         perms = &zcdndev->perms;
 524         }
 525 #endif
 526         filp->private_data = (void *) perms;
 527
 528         atomic_inc(&zcrypt_open_count);
 529         return stream_open(inode, filp);
 530 }
 531
 532 /**
 533  * zcrypt_release(): Count number of users.
 534  *
 535  * Device close function to count number of users.
 536  */
 537 static int zcrypt_release(struct inode *inode, struct file *filp)
 538 {
 539 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 540         if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 541                 struct zcdn_device *zcdndev;
 542
 543                 if (mutex_lock_interruptible(&ap_perms_mutex))
 544                         return -ERESTARTSYS;
 545                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 546                 mutex_unlock(&ap_perms_mutex);
 547                 if (zcdndev) {
 548                         /* 2 puts here: one for find, one for open */
 549                         put_device(&zcdndev->device);
 550                         put_device(&zcdndev->device);
 551                 }
 552         }
 553 #endif
 554
 555         atomic_dec(&zcrypt_open_count);
 556         return 0;
 557 }
 558
 559 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
 560                                      unsigned int cmd)
 561 {
 562         int rc = -EPERM;
 563         int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
 564
 565         if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
 566                 if (test_bit_inv(ioctlnr, perms->ioctlm))
 567                         rc = 0;
 568         }
 569
 570         if (rc)
 571                 ZCRYPT_DBF(DBF_WARN,
 572                            "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
 573                            ioctlnr, rc);
 574
 575         return rc;
 576 }
 577
 578 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
 579 {
 580         return test_bit_inv(card, perms->apm) ? true : false;
 581 }
 582
 583 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
 584 {
 585         return test_bit_inv(queue, perms->aqm) ? true : false;
 586 }
 587
 588 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
 589                                                      struct zcrypt_queue *zq,
 590                                                      struct module **pmod,
 591                                                      unsigned int weight)
 592 {
 593         if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
 594                 return NULL;
 595         zcrypt_queue_get(zq);
 596         get_device(&zq->queue->ap_dev.device);
 597         atomic_add(weight, &zc->load);
 598         atomic_add(weight, &zq->load);
 599         zq->request_count++;
 600         *pmod = zq->queue->ap_dev.drv->driver.owner;
 601         return zq;
 602 }
 603
 604 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
 605                                      struct zcrypt_queue *zq,
 606                                      struct module *mod,
 607                                      unsigned int weight)
 608 {
 609         zq->request_count--;
 610         atomic_sub(weight, &zc->load);
 611         atomic_sub(weight, &zq->load);
 612         put_device(&zq->queue->ap_dev.device);
 613         zcrypt_queue_put(zq);
 614         module_put(mod);
 615 }
 616
 617 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
 618                                        struct zcrypt_card *pref_zc,
 619                                        unsigned int weight,
 620                                        unsigned int pref_weight)
 621 {
 622         if (!pref_zc)
 623                 return false;
 624         weight += atomic_read(&zc->load);
 625         pref_weight += atomic_read(&pref_zc->load);
 626         if (weight == pref_weight)
 627                 return atomic_read(&zc->card->total_request_count) >
 628                         atomic_read(&pref_zc->card->total_request_count);
 629         return weight > pref_weight;
 630 }
 631
 632 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
 633                                         struct zcrypt_queue *pref_zq,
 634                                         unsigned int weight,
 635                                         unsigned int pref_weight)
 636 {
 637         if (!pref_zq)
 638                 return false;
 639         weight += atomic_read(&zq->load);
 640         pref_weight += atomic_read(&pref_zq->load);
 641         if (weight == pref_weight)
 642                 return zq->queue->total_request_count >
 643                         pref_zq->queue->total_request_count;
 644         return weight > pref_weight;
 645 }
 646
 647 /*
 648  * zcrypt ioctls.
 649  */
 650 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
 651                                struct ica_rsa_modexpo *mex)
 652 {
 653         struct zcrypt_card *zc, *pref_zc;
 654         struct zcrypt_queue *zq, *pref_zq;
 655         unsigned int weight, pref_weight;
 656         unsigned int func_code;
 657         int qid = 0, rc = -ENODEV;
 658         struct module *mod;
 659
 660         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
 661
 662         if (mex->outputdatalength < mex->inputdatalength) {
 663                 func_code = 0;
 664                 rc = -EINVAL;
 665                 goto out;
 666         }
 667
 668         /*
 669          * As long as outputdatalength is big enough, we can set the
 670          * outputdatalength equal to the inputdatalength, since that is the
 671          * number of bytes we will copy in any case
 672          */
 673         mex->outputdatalength = mex->inputdatalength;
 674
 675         rc = get_rsa_modex_fc(mex, &func_code);
 676         if (rc)
 677                 goto out;
 678
 679         pref_zc = NULL;
 680         pref_zq = NULL;
 681         spin_lock(&zcrypt_list_lock);
 682         for_each_zcrypt_card(zc) {
 683                 /* Check for online accelarator and CCA cards */
 684                 if (!zc->online || !(zc->card->functions & 0x18000000))
 685                         continue;
 686                 /* Check for size limits */
 687                 if (zc->min_mod_size > mex->inputdatalength ||
 688                     zc->max_mod_size < mex->inputdatalength)
 689                         continue;
 690                 /* check if device node has admission for this card */
 691                 if (!zcrypt_check_card(perms, zc->card->id))
 692                         continue;
 693                 /* get weight index of the card device  */
 694                 weight = zc->speed_rating[func_code];
 695                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 696                         continue;
 697                 for_each_zcrypt_queue(zq, zc) {
 698                         /* check if device is online and eligible */
 699                         if (!zq->online || !zq->ops->rsa_modexpo)
 700                                 continue;
 701                         /* check if device node has admission for this queue */
 702                         if (!zcrypt_check_queue(perms,
 703                                                 AP_QID_QUEUE(zq->queue->qid)))
 704                                 continue;
 705                         if (zcrypt_queue_compare(zq, pref_zq,
 706                                                  weight, pref_weight))
 707                                 continue;
 708                         pref_zc = zc;
 709                         pref_zq = zq;
 710                         pref_weight = weight;
 711                 }
 712         }
 713         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 714         spin_unlock(&zcrypt_list_lock);
 715
 716         if (!pref_zq) {
 717                 rc = -ENODEV;
 718                 goto out;
 719         }
 720
 721         qid = pref_zq->queue->qid;
 722         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
 723
 724         spin_lock(&zcrypt_list_lock);
 725         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 726         spin_unlock(&zcrypt_list_lock);
 727
 728 out:
 729         trace_s390_zcrypt_rep(mex, func_code, rc,
 730                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 731         return rc;
 732 }
 733
 734 static long zcrypt_rsa_crt(struct ap_perms *perms,
 735                            struct ica_rsa_modexpo_crt *crt)
 736 {
 737         struct zcrypt_card *zc, *pref_zc;
 738         struct zcrypt_queue *zq, *pref_zq;
 739         unsigned int weight, pref_weight;
 740         unsigned int func_code;
 741         int qid = 0, rc = -ENODEV;
 742         struct module *mod;
 743
 744         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
 745
 746         if (crt->outputdatalength < crt->inputdatalength) {
 747                 func_code = 0;
 748                 rc = -EINVAL;
 749                 goto out;
 750         }
 751
 752         /*
 753          * As long as outputdatalength is big enough, we can set the
 754          * outputdatalength equal to the inputdatalength, since that is the
 755          * number of bytes we will copy in any case
 756          */
 757         crt->outputdatalength = crt->inputdatalength;
 758
 759         rc = get_rsa_crt_fc(crt, &func_code);
 760         if (rc)
 761                 goto out;
 762
 763         pref_zc = NULL;
 764         pref_zq = NULL;
 765         spin_lock(&zcrypt_list_lock);
 766         for_each_zcrypt_card(zc) {
 767                 /* Check for online accelarator and CCA cards */
 768                 if (!zc->online || !(zc->card->functions & 0x18000000))
 769                         continue;
 770                 /* Check for size limits */
 771                 if (zc->min_mod_size > crt->inputdatalength ||
 772                     zc->max_mod_size < crt->inputdatalength)
 773                         continue;
 774                 /* check if device node has admission for this card */
 775                 if (!zcrypt_check_card(perms, zc->card->id))
 776                         continue;
 777                 /* get weight index of the card device  */
 778                 weight = zc->speed_rating[func_code];
 779                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 780                         continue;
 781                 for_each_zcrypt_queue(zq, zc) {
 782                         /* check if device is online and eligible */
 783                         if (!zq->online || !zq->ops->rsa_modexpo_crt)
 784                                 continue;
 785                         /* check if device node has admission for this queue */
 786                         if (!zcrypt_check_queue(perms,
 787                                                 AP_QID_QUEUE(zq->queue->qid)))
 788                                 continue;
 789                         if (zcrypt_queue_compare(zq, pref_zq,
 790                                                  weight, pref_weight))
 791                                 continue;
 792                         pref_zc = zc;
 793                         pref_zq = zq;
 794                         pref_weight = weight;
 795                 }
 796         }
 797         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 798         spin_unlock(&zcrypt_list_lock);
 799
 800         if (!pref_zq) {
 801                 rc = -ENODEV;
 802                 goto out;
 803         }
 804
 805         qid = pref_zq->queue->qid;
 806         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
 807
 808         spin_lock(&zcrypt_list_lock);
 809         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 810         spin_unlock(&zcrypt_list_lock);
 811
 812 out:
 813         trace_s390_zcrypt_rep(crt, func_code, rc,
 814                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 815         return rc;
 816 }
 817
 818 static long _zcrypt_send_cprb(struct ap_perms *perms,
 819                               struct ica_xcRB *xcRB)
 820 {
 821         struct zcrypt_card *zc, *pref_zc;
 822         struct zcrypt_queue *zq, *pref_zq;
 823         struct ap_message ap_msg;
 824         unsigned int weight, pref_weight;
 825         unsigned int func_code;
 826         unsigned short *domain, tdom;
 827         int qid = 0, rc = -ENODEV;
 828         struct module *mod;
 829
 830         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
 831
 832         xcRB->status = 0;
 833         ap_init_message(&ap_msg);
 834         rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
 835         if (rc)
 836                 goto out;
 837
 838         /*
 839          * If a valid target domain is set and this domain is NOT a usage
 840          * domain but a control only domain, use the default domain as target.
 841          */
 842         tdom = *domain;
 843         if (tdom >= 0 && tdom < AP_DOMAINS &&
 844             !ap_test_config_usage_domain(tdom) &&
 845             ap_test_config_ctrl_domain(tdom) &&
 846             ap_domain_index >= 0)
 847                 tdom = ap_domain_index;
 848
 849         pref_zc = NULL;
 850         pref_zq = NULL;
 851         spin_lock(&zcrypt_list_lock);
 852         for_each_zcrypt_card(zc) {
 853                 /* Check for online CCA cards */
 854                 if (!zc->online || !(zc->card->functions & 0x10000000))
 855                         continue;
 856                 /* Check for user selected CCA card */
 857                 if (xcRB->user_defined != AUTOSELECT &&
 858                     xcRB->user_defined != zc->card->id)
 859                         continue;
 860                 /* check if device node has admission for this card */
 861                 if (!zcrypt_check_card(perms, zc->card->id))
 862                         continue;
 863                 /* get weight index of the card device  */
 864                 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 865                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 866                         continue;
 867                 for_each_zcrypt_queue(zq, zc) {
 868                         /* check if device is online and eligible */
 869                         if (!zq->online ||
 870                             !zq->ops->send_cprb ||
 871                             (tdom != (unsigned short) AUTOSELECT &&
 872                              tdom != AP_QID_QUEUE(zq->queue->qid)))
 873                                 continue;
 874                         /* check if device node has admission for this queue */
 875                         if (!zcrypt_check_queue(perms,
 876                                                 AP_QID_QUEUE(zq->queue->qid)))
 877                                 continue;
 878                         if (zcrypt_queue_compare(zq, pref_zq,
 879                                                  weight, pref_weight))
 880                                 continue;
 881                         pref_zc = zc;
 882                         pref_zq = zq;
 883                         pref_weight = weight;
 884                 }
 885         }
 886         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 887         spin_unlock(&zcrypt_list_lock);
 888
 889         if (!pref_zq) {
 890                 rc = -ENODEV;
 891                 goto out;
 892         }
 893
 894         /* in case of auto select, provide the correct domain */
 895         qid = pref_zq->queue->qid;
 896         if (*domain == (unsigned short) AUTOSELECT)
 897                 *domain = AP_QID_QUEUE(qid);
 898
 899         rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
 900
 901         spin_lock(&zcrypt_list_lock);
 902         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 903         spin_unlock(&zcrypt_list_lock);
 904
 905 out:
 906         ap_release_message(&ap_msg);
 907         trace_s390_zcrypt_rep(xcRB, func_code, rc,
 908                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 909         return rc;
 910 }
 911
 912 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
 913 {
 914         return _zcrypt_send_cprb(&ap_perms, xcRB);
 915 }
 916 EXPORT_SYMBOL(zcrypt_send_cprb);
 917
 918 static bool is_desired_ep11_card(unsigned int dev_id,
 919                                  unsigned short target_num,
 920                                  struct ep11_target_dev *targets)
 921 {
 922         while (target_num-- > 0) {
 923                 if (dev_id == targets->ap_id)
 924                         return true;
 925                 targets++;
 926         }
 927         return false;
 928 }
 929
 930 static bool is_desired_ep11_queue(unsigned int dev_qid,
 931                                   unsigned short target_num,
 932                                   struct ep11_target_dev *targets)
 933 {
 934         while (target_num-- > 0) {
 935                 if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
 936                         return true;
 937                 targets++;
 938         }
 939         return false;
 940 }
 941
 942 static long zcrypt_send_ep11_cprb(struct ap_perms *perms,
 943                                   struct ep11_urb *xcrb)
 944 {
 945         struct zcrypt_card *zc, *pref_zc;
 946         struct zcrypt_queue *zq, *pref_zq;
 947         struct ep11_target_dev *targets;
 948         unsigned short target_num;
 949         unsigned int weight, pref_weight;
 950         unsigned int func_code;
 951         struct ap_message ap_msg;
 952         int qid = 0, rc = -ENODEV;
 953         struct module *mod;
 954
 955         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
 956
 957         ap_init_message(&ap_msg);
 958
 959         target_num = (unsigned short) xcrb->targets_num;
 960
 961         /* empty list indicates autoselect (all available targets) */
 962         targets = NULL;
 963         if (target_num != 0) {
 964                 struct ep11_target_dev __user *uptr;
 965
 966                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
 967                 if (!targets) {
 968                         func_code = 0;
 969                         rc = -ENOMEM;
 970                         goto out;
 971                 }
 972
 973                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
 974                 if (copy_from_user(targets, uptr,
 975                                    target_num * sizeof(*targets))) {
 976                         func_code = 0;
 977                         rc = -EFAULT;
 978                         goto out_free;
 979                 }
 980         }
 981
 982         rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
 983         if (rc)
 984                 goto out_free;
 985
 986         pref_zc = NULL;
 987         pref_zq = NULL;
 988         spin_lock(&zcrypt_list_lock);
 989         for_each_zcrypt_card(zc) {
 990                 /* Check for online EP11 cards */
 991                 if (!zc->online || !(zc->card->functions & 0x04000000))
 992                         continue;
 993                 /* Check for user selected EP11 card */
 994                 if (targets &&
 995                     !is_desired_ep11_card(zc->card->id, target_num, targets))
 996                         continue;
 997                 /* check if device node has admission for this card */
 998                 if (!zcrypt_check_card(perms, zc->card->id))
 999                         continue;
1000                 /* get weight index of the card device  */
1001                 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1002                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1003                         continue;
1004                 for_each_zcrypt_queue(zq, zc) {
1005                         /* check if device is online and eligible */
1006                         if (!zq->online ||
1007                             !zq->ops->send_ep11_cprb ||
1008                             (targets &&
1009                              !is_desired_ep11_queue(zq->queue->qid,
1010                                                     target_num, targets)))
1011                                 continue;
1012                         /* check if device node has admission for this queue */
1013                         if (!zcrypt_check_queue(perms,
1014                                                 AP_QID_QUEUE(zq->queue->qid)))
1015                                 continue;
1016                         if (zcrypt_queue_compare(zq, pref_zq,
1017                                                  weight, pref_weight))
1018                                 continue;
1019                         pref_zc = zc;
1020                         pref_zq = zq;
1021                         pref_weight = weight;
1022                 }
1023         }
1024         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1025         spin_unlock(&zcrypt_list_lock);
1026
1027         if (!pref_zq) {
1028                 rc = -ENODEV;
1029                 goto out_free;
1030         }
1031
1032         qid = pref_zq->queue->qid;
1033         rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
1034
1035         spin_lock(&zcrypt_list_lock);
1036         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1037         spin_unlock(&zcrypt_list_lock);
1038
1039 out_free:
1040         kfree(targets);
1041 out:
1042         ap_release_message(&ap_msg);
1043         trace_s390_zcrypt_rep(xcrb, func_code, rc,
1044                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1045         return rc;
1046 }
1047
1048 static long zcrypt_rng(char *buffer)
1049 {
1050         struct zcrypt_card *zc, *pref_zc;
1051         struct zcrypt_queue *zq, *pref_zq;
1052         unsigned int weight, pref_weight;
1053         unsigned int func_code;
1054         struct ap_message ap_msg;
1055         unsigned int domain;
1056         int qid = 0, rc = -ENODEV;
1057         struct module *mod;
1058
1059         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1060
1061         ap_init_message(&ap_msg);
1062         rc = get_rng_fc(&ap_msg, &func_code, &domain);
1063         if (rc)
1064                 goto out;
1065
1066         pref_zc = NULL;
1067         pref_zq = NULL;
1068         spin_lock(&zcrypt_list_lock);
1069         for_each_zcrypt_card(zc) {
1070                 /* Check for online CCA cards */
1071                 if (!zc->online || !(zc->card->functions & 0x10000000))
1072                         continue;
1073                 /* get weight index of the card device  */
1074                 weight = zc->speed_rating[func_code];
1075                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1076                         continue;
1077                 for_each_zcrypt_queue(zq, zc) {
1078                         /* check if device is online and eligible */
1079                         if (!zq->online || !zq->ops->rng)
1080                                 continue;
1081                         if (zcrypt_queue_compare(zq, pref_zq,
1082                                                  weight, pref_weight))
1083                                 continue;
1084                         pref_zc = zc;
1085                         pref_zq = zq;
1086                         pref_weight = weight;
1087                 }
1088         }
1089         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1090         spin_unlock(&zcrypt_list_lock);
1091
1092         if (!pref_zq) {
1093                 rc = -ENODEV;
1094                 goto out;
1095         }
1096
1097         qid = pref_zq->queue->qid;
1098         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1099
1100         spin_lock(&zcrypt_list_lock);
1101         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1102         spin_unlock(&zcrypt_list_lock);
1103
1104 out:
1105         ap_release_message(&ap_msg);
1106         trace_s390_zcrypt_rep(buffer, func_code, rc,
1107                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1108         return rc;
1109 }
1110
1111 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1112 {
1113         struct zcrypt_card *zc;
1114         struct zcrypt_queue *zq;
1115         struct zcrypt_device_status *stat;
1116         int card, queue;
1117
1118         memset(devstatus, 0, MAX_ZDEV_ENTRIES
1119                * sizeof(struct zcrypt_device_status));
1120
1121         spin_lock(&zcrypt_list_lock);
1122         for_each_zcrypt_card(zc) {
1123                 for_each_zcrypt_queue(zq, zc) {
1124                         card = AP_QID_CARD(zq->queue->qid);
1125                         if (card >= MAX_ZDEV_CARDIDS)
1126                                 continue;
1127                         queue = AP_QID_QUEUE(zq->queue->qid);
1128                         stat = &devstatus[card * AP_DOMAINS + queue];
1129                         stat->hwtype = zc->card->ap_dev.device_type;
1130                         stat->functions = zc->card->functions >> 26;
1131                         stat->qid = zq->queue->qid;
1132                         stat->online = zq->online ? 0x01 : 0x00;
1133                 }
1134         }
1135         spin_unlock(&zcrypt_list_lock);
1136 }
1137
1138 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1139 {
1140         struct zcrypt_card *zc;
1141         struct zcrypt_queue *zq;
1142         struct zcrypt_device_status_ext *stat;
1143         int card, queue;
1144
1145         memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1146                * sizeof(struct zcrypt_device_status_ext));
1147
1148         spin_lock(&zcrypt_list_lock);
1149         for_each_zcrypt_card(zc) {
1150                 for_each_zcrypt_queue(zq, zc) {
1151                         card = AP_QID_CARD(zq->queue->qid);
1152                         queue = AP_QID_QUEUE(zq->queue->qid);
1153                         stat = &devstatus[card * AP_DOMAINS + queue];
1154                         stat->hwtype = zc->card->ap_dev.device_type;
1155                         stat->functions = zc->card->functions >> 26;
1156                         stat->qid = zq->queue->qid;
1157                         stat->online = zq->online ? 0x01 : 0x00;
1158                 }
1159         }
1160         spin_unlock(&zcrypt_list_lock);
1161 }
1162 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1163
1164 static void zcrypt_status_mask(char status[], size_t max_adapters)
1165 {
1166         struct zcrypt_card *zc;
1167         struct zcrypt_queue *zq;
1168         int card;
1169
1170         memset(status, 0, max_adapters);
1171         spin_lock(&zcrypt_list_lock);
1172         for_each_zcrypt_card(zc) {
1173                 for_each_zcrypt_queue(zq, zc) {
1174                         card = AP_QID_CARD(zq->queue->qid);
1175                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1176                             || card >= max_adapters)
1177                                 continue;
1178                         status[card] = zc->online ? zc->user_space_type : 0x0d;
1179                 }
1180         }
1181         spin_unlock(&zcrypt_list_lock);
1182 }
1183
1184 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1185 {
1186         struct zcrypt_card *zc;
1187         struct zcrypt_queue *zq;
1188         int card;
1189
1190         memset(qdepth, 0, max_adapters);
1191         spin_lock(&zcrypt_list_lock);
1192         local_bh_disable();
1193         for_each_zcrypt_card(zc) {
1194                 for_each_zcrypt_queue(zq, zc) {
1195                         card = AP_QID_CARD(zq->queue->qid);
1196                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1197                             || card >= max_adapters)
1198                                 continue;
1199                         spin_lock(&zq->queue->lock);
1200                         qdepth[card] =
1201                                 zq->queue->pendingq_count +
1202                                 zq->queue->requestq_count;
1203                         spin_unlock(&zq->queue->lock);
1204                 }
1205         }
1206         local_bh_enable();
1207         spin_unlock(&zcrypt_list_lock);
1208 }
1209
1210 static void zcrypt_perdev_reqcnt(int reqcnt[], size_t max_adapters)
1211 {
1212         struct zcrypt_card *zc;
1213         struct zcrypt_queue *zq;
1214         int card;
1215
1216         memset(reqcnt, 0, sizeof(int) * max_adapters);
1217         spin_lock(&zcrypt_list_lock);
1218         local_bh_disable();
1219         for_each_zcrypt_card(zc) {
1220                 for_each_zcrypt_queue(zq, zc) {
1221                         card = AP_QID_CARD(zq->queue->qid);
1222                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1223                             || card >= max_adapters)
1224                                 continue;
1225                         spin_lock(&zq->queue->lock);
1226                         reqcnt[card] = zq->queue->total_request_count;
1227                         spin_unlock(&zq->queue->lock);
1228                 }
1229         }
1230         local_bh_enable();
1231         spin_unlock(&zcrypt_list_lock);
1232 }
1233
1234 static int zcrypt_pendingq_count(void)
1235 {
1236         struct zcrypt_card *zc;
1237         struct zcrypt_queue *zq;
1238         int pendingq_count;
1239
1240         pendingq_count = 0;
1241         spin_lock(&zcrypt_list_lock);
1242         local_bh_disable();
1243         for_each_zcrypt_card(zc) {
1244                 for_each_zcrypt_queue(zq, zc) {
1245                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1246                                 continue;
1247                         spin_lock(&zq->queue->lock);
1248                         pendingq_count += zq->queue->pendingq_count;
1249                         spin_unlock(&zq->queue->lock);
1250                 }
1251         }
1252         local_bh_enable();
1253         spin_unlock(&zcrypt_list_lock);
1254         return pendingq_count;
1255 }
1256
1257 static int zcrypt_requestq_count(void)
1258 {
1259         struct zcrypt_card *zc;
1260         struct zcrypt_queue *zq;
1261         int requestq_count;
1262
1263         requestq_count = 0;
1264         spin_lock(&zcrypt_list_lock);
1265         local_bh_disable();
1266         for_each_zcrypt_card(zc) {
1267                 for_each_zcrypt_queue(zq, zc) {
1268                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1269                                 continue;
1270                         spin_lock(&zq->queue->lock);
1271                         requestq_count += zq->queue->requestq_count;
1272                         spin_unlock(&zq->queue->lock);
1273                 }
1274         }
1275         local_bh_enable();
1276         spin_unlock(&zcrypt_list_lock);
1277         return requestq_count;
1278 }
1279
1280 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1281                                   unsigned long arg)
1282 {
1283         int rc;
1284         struct ap_perms *perms =
1285                 (struct ap_perms *) filp->private_data;
1286
1287         rc = zcrypt_check_ioctl(perms, cmd);
1288         if (rc)
1289                 return rc;
1290
1291         switch (cmd) {
1292         case ICARSAMODEXPO: {
1293                 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1294                 struct ica_rsa_modexpo mex;
1295
1296                 if (copy_from_user(&mex, umex, sizeof(mex)))
1297                         return -EFAULT;
1298                 do {
1299                         rc = zcrypt_rsa_modexpo(perms, &mex);
1300                 } while (rc == -EAGAIN);
1301                 /* on failure: retry once again after a requested rescan */
1302                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1303                         do {
1304                                 rc = zcrypt_rsa_modexpo(perms, &mex);
1305                         } while (rc == -EAGAIN);
1306                 if (rc) {
1307                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1308                         return rc;
1309                 }
1310                 return put_user(mex.outputdatalength, &umex->outputdatalength);
1311         }
1312         case ICARSACRT: {
1313                 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1314                 struct ica_rsa_modexpo_crt crt;
1315
1316                 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1317                         return -EFAULT;
1318                 do {
1319                         rc = zcrypt_rsa_crt(perms, &crt);
1320                 } while (rc == -EAGAIN);
1321                 /* on failure: retry once again after a requested rescan */
1322                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1323                         do {
1324                                 rc = zcrypt_rsa_crt(perms, &crt);
1325                         } while (rc == -EAGAIN);
1326                 if (rc) {
1327                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1328                         return rc;
1329                 }
1330                 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1331         }
1332         case ZSECSENDCPRB: {
1333                 struct ica_xcRB __user *uxcRB = (void __user *) arg;
1334                 struct ica_xcRB xcRB;
1335
1336                 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1337                         return -EFAULT;
1338                 do {
1339                         rc = _zcrypt_send_cprb(perms, &xcRB);
1340                 } while (rc == -EAGAIN);
1341                 /* on failure: retry once again after a requested rescan */
1342                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1343                         do {
1344                                 rc = _zcrypt_send_cprb(perms, &xcRB);
1345                         } while (rc == -EAGAIN);
1346                 if (rc)
1347                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1348                                    rc, xcRB.status);
1349                 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1350                         return -EFAULT;
1351                 return rc;
1352         }
1353         case ZSENDEP11CPRB: {
1354                 struct ep11_urb __user *uxcrb = (void __user *)arg;
1355                 struct ep11_urb xcrb;
1356
1357                 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1358                         return -EFAULT;
1359                 do {
1360                         rc = zcrypt_send_ep11_cprb(perms, &xcrb);
1361                 } while (rc == -EAGAIN);
1362                 /* on failure: retry once again after a requested rescan */
1363                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1364                         do {
1365                                 rc = zcrypt_send_ep11_cprb(perms, &xcrb);
1366                         } while (rc == -EAGAIN);
1367                 if (rc)
1368                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1369                 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1370                         return -EFAULT;
1371                 return rc;
1372         }
1373         case ZCRYPT_DEVICE_STATUS: {
1374                 struct zcrypt_device_status_ext *device_status;
1375                 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1376                         * sizeof(struct zcrypt_device_status_ext);
1377
1378                 device_status = kzalloc(total_size, GFP_KERNEL);
1379                 if (!device_status)
1380                         return -ENOMEM;
1381                 zcrypt_device_status_mask_ext(device_status);
1382                 if (copy_to_user((char __user *) arg, device_status,
1383                                  total_size))
1384                         rc = -EFAULT;
1385                 kfree(device_status);
1386                 return rc;
1387         }
1388         case ZCRYPT_STATUS_MASK: {
1389                 char status[AP_DEVICES];
1390
1391                 zcrypt_status_mask(status, AP_DEVICES);
1392                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1393                         return -EFAULT;
1394                 return 0;
1395         }
1396         case ZCRYPT_QDEPTH_MASK: {
1397                 char qdepth[AP_DEVICES];
1398
1399                 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1400                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1401                         return -EFAULT;
1402                 return 0;
1403         }
1404         case ZCRYPT_PERDEV_REQCNT: {
1405                 int *reqcnt;
1406
1407                 reqcnt = kcalloc(AP_DEVICES, sizeof(int), GFP_KERNEL);
1408                 if (!reqcnt)
1409                         return -ENOMEM;
1410                 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1411                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1412                         rc = -EFAULT;
1413                 kfree(reqcnt);
1414                 return rc;
1415         }
1416         case Z90STAT_REQUESTQ_COUNT:
1417                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1418         case Z90STAT_PENDINGQ_COUNT:
1419                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1420         case Z90STAT_TOTALOPEN_COUNT:
1421                 return put_user(atomic_read(&zcrypt_open_count),
1422                                 (int __user *) arg);
1423         case Z90STAT_DOMAIN_INDEX:
1424                 return put_user(ap_domain_index, (int __user *) arg);
1425         /*
1426          * Deprecated ioctls
1427          */
1428         case ZDEVICESTATUS: {
1429                 /* the old ioctl supports only 64 adapters */
1430                 struct zcrypt_device_status *device_status;
1431                 size_t total_size = MAX_ZDEV_ENTRIES
1432                         * sizeof(struct zcrypt_device_status);
1433
1434                 device_status = kzalloc(total_size, GFP_KERNEL);
1435                 if (!device_status)
1436                         return -ENOMEM;
1437                 zcrypt_device_status_mask(device_status);
1438                 if (copy_to_user((char __user *) arg, device_status,
1439                                  total_size))
1440                         rc = -EFAULT;
1441                 kfree(device_status);
1442                 return rc;
1443         }
1444         case Z90STAT_STATUS_MASK: {
1445                 /* the old ioctl supports only 64 adapters */
1446                 char status[MAX_ZDEV_CARDIDS];
1447
1448                 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1449                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1450                         return -EFAULT;
1451                 return 0;
1452         }
1453         case Z90STAT_QDEPTH_MASK: {
1454                 /* the old ioctl supports only 64 adapters */
1455                 char qdepth[MAX_ZDEV_CARDIDS];
1456
1457                 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1458                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1459                         return -EFAULT;
1460                 return 0;
1461         }
1462         case Z90STAT_PERDEV_REQCNT: {
1463                 /* the old ioctl supports only 64 adapters */
1464                 int reqcnt[MAX_ZDEV_CARDIDS];
1465
1466                 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1467                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1468                         return -EFAULT;
1469                 return 0;
1470         }
1471         /* unknown ioctl number */
1472         default:
1473                 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1474                 return -ENOIOCTLCMD;
1475         }
1476 }
1477
1478 #ifdef CONFIG_COMPAT
1479 /*
1480  * ioctl32 conversion routines
1481  */
1482 struct compat_ica_rsa_modexpo {
1483         compat_uptr_t   inputdata;
1484         unsigned int    inputdatalength;
1485         compat_uptr_t   outputdata;
1486         unsigned int    outputdatalength;
1487         compat_uptr_t   b_key;
1488         compat_uptr_t   n_modulus;
1489 };
1490
1491 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1492                             unsigned int cmd, unsigned long arg)
1493 {
1494         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1495         struct compat_ica_rsa_modexpo mex32;
1496         struct ica_rsa_modexpo mex64;
1497         long rc;
1498
1499         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1500                 return -EFAULT;
1501         mex64.inputdata = compat_ptr(mex32.inputdata);
1502         mex64.inputdatalength = mex32.inputdatalength;
1503         mex64.outputdata = compat_ptr(mex32.outputdata);
1504         mex64.outputdatalength = mex32.outputdatalength;
1505         mex64.b_key = compat_ptr(mex32.b_key);
1506         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1507         do {
1508                 rc = zcrypt_rsa_modexpo(perms, &mex64);
1509         } while (rc == -EAGAIN);
1510         /* on failure: retry once again after a requested rescan */
1511         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1512                 do {
1513                         rc = zcrypt_rsa_modexpo(perms, &mex64);
1514                 } while (rc == -EAGAIN);
1515         if (rc)
1516                 return rc;
1517         return put_user(mex64.outputdatalength,
1518                         &umex32->outputdatalength);
1519 }
1520
1521 struct compat_ica_rsa_modexpo_crt {
1522         compat_uptr_t   inputdata;
1523         unsigned int    inputdatalength;
1524         compat_uptr_t   outputdata;
1525         unsigned int    outputdatalength;
1526         compat_uptr_t   bp_key;
1527         compat_uptr_t   bq_key;
1528         compat_uptr_t   np_prime;
1529         compat_uptr_t   nq_prime;
1530         compat_uptr_t   u_mult_inv;
1531 };
1532
1533 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1534                                 unsigned int cmd, unsigned long arg)
1535 {
1536         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1537         struct compat_ica_rsa_modexpo_crt crt32;
1538         struct ica_rsa_modexpo_crt crt64;
1539         long rc;
1540
1541         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1542                 return -EFAULT;
1543         crt64.inputdata = compat_ptr(crt32.inputdata);
1544         crt64.inputdatalength = crt32.inputdatalength;
1545         crt64.outputdata = compat_ptr(crt32.outputdata);
1546         crt64.outputdatalength = crt32.outputdatalength;
1547         crt64.bp_key = compat_ptr(crt32.bp_key);
1548         crt64.bq_key = compat_ptr(crt32.bq_key);
1549         crt64.np_prime = compat_ptr(crt32.np_prime);
1550         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1551         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1552         do {
1553                 rc = zcrypt_rsa_crt(perms, &crt64);
1554         } while (rc == -EAGAIN);
1555         /* on failure: retry once again after a requested rescan */
1556         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1557                 do {
1558                         rc = zcrypt_rsa_crt(perms, &crt64);
1559                 } while (rc == -EAGAIN);
1560         if (rc)
1561                 return rc;
1562         return put_user(crt64.outputdatalength,
1563                         &ucrt32->outputdatalength);
1564 }
1565
1566 struct compat_ica_xcRB {
1567         unsigned short  agent_ID;
1568         unsigned int    user_defined;
1569         unsigned short  request_ID;
1570         unsigned int    request_control_blk_length;
1571         unsigned char   padding1[16 - sizeof(compat_uptr_t)];
1572         compat_uptr_t   request_control_blk_addr;
1573         unsigned int    request_data_length;
1574         char            padding2[16 - sizeof(compat_uptr_t)];
1575         compat_uptr_t   request_data_address;
1576         unsigned int    reply_control_blk_length;
1577         char            padding3[16 - sizeof(compat_uptr_t)];
1578         compat_uptr_t   reply_control_blk_addr;
1579         unsigned int    reply_data_length;
1580         char            padding4[16 - sizeof(compat_uptr_t)];
1581         compat_uptr_t   reply_data_addr;
1582         unsigned short  priority_window;
1583         unsigned int    status;
1584 } __packed;
1585
1586 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1587                          unsigned int cmd, unsigned long arg)
1588 {
1589         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1590         struct compat_ica_xcRB xcRB32;
1591         struct ica_xcRB xcRB64;
1592         long rc;
1593
1594         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1595                 return -EFAULT;
1596         xcRB64.agent_ID = xcRB32.agent_ID;
1597         xcRB64.user_defined = xcRB32.user_defined;
1598         xcRB64.request_ID = xcRB32.request_ID;
1599         xcRB64.request_control_blk_length =
1600                 xcRB32.request_control_blk_length;
1601         xcRB64.request_control_blk_addr =
1602                 compat_ptr(xcRB32.request_control_blk_addr);
1603         xcRB64.request_data_length =
1604                 xcRB32.request_data_length;
1605         xcRB64.request_data_address =
1606                 compat_ptr(xcRB32.request_data_address);
1607         xcRB64.reply_control_blk_length =
1608                 xcRB32.reply_control_blk_length;
1609         xcRB64.reply_control_blk_addr =
1610                 compat_ptr(xcRB32.reply_control_blk_addr);
1611         xcRB64.reply_data_length = xcRB32.reply_data_length;
1612         xcRB64.reply_data_addr =
1613                 compat_ptr(xcRB32.reply_data_addr);
1614         xcRB64.priority_window = xcRB32.priority_window;
1615         xcRB64.status = xcRB32.status;
1616         do {
1617                 rc = _zcrypt_send_cprb(perms, &xcRB64);
1618         } while (rc == -EAGAIN);
1619         /* on failure: retry once again after a requested rescan */
1620         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1621                 do {
1622                         rc = _zcrypt_send_cprb(perms, &xcRB64);
1623                 } while (rc == -EAGAIN);
1624         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1625         xcRB32.reply_data_length = xcRB64.reply_data_length;
1626         xcRB32.status = xcRB64.status;
1627         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1628                 return -EFAULT;
1629         return rc;
1630 }
1631
1632 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1633                          unsigned long arg)
1634 {
1635         int rc;
1636         struct ap_perms *perms =
1637                 (struct ap_perms *) filp->private_data;
1638
1639         rc = zcrypt_check_ioctl(perms, cmd);
1640         if (rc)
1641                 return rc;
1642
1643         if (cmd == ICARSAMODEXPO)
1644                 return trans_modexpo32(perms, filp, cmd, arg);
1645         if (cmd == ICARSACRT)
1646                 return trans_modexpo_crt32(perms, filp, cmd, arg);
1647         if (cmd == ZSECSENDCPRB)
1648                 return trans_xcRB32(perms, filp, cmd, arg);
1649         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1650 }
1651 #endif
1652
1653 /*
1654  * Misc device file operations.
1655  */
1656 static const struct file_operations zcrypt_fops = {
1657         .owner          = THIS_MODULE,
1658         .read           = zcrypt_read,
1659         .write          = zcrypt_write,
1660         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1661 #ifdef CONFIG_COMPAT
1662         .compat_ioctl   = zcrypt_compat_ioctl,
1663 #endif
1664         .open           = zcrypt_open,
1665         .release        = zcrypt_release,
1666         .llseek         = no_llseek,
1667 };
1668
1669 /*
1670  * Misc device.
1671  */
1672 static struct miscdevice zcrypt_misc_device = {
1673         .minor      = MISC_DYNAMIC_MINOR,
1674         .name       = "z90crypt",
1675         .fops       = &zcrypt_fops,
1676 };
1677
1678 static int zcrypt_rng_device_count;
1679 static u32 *zcrypt_rng_buffer;
1680 static int zcrypt_rng_buffer_index;
1681 static DEFINE_MUTEX(zcrypt_rng_mutex);
1682
1683 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1684 {
1685         int rc;
1686
1687         /*
1688          * We don't need locking here because the RNG API guarantees serialized
1689          * read method calls.
1690          */
1691         if (zcrypt_rng_buffer_index == 0) {
1692                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1693                 /* on failure: retry once again after a requested rescan */
1694                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1695                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1696                 if (rc < 0)
1697                         return -EIO;
1698                 zcrypt_rng_buffer_index = rc / sizeof(*data);
1699         }
1700         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1701         return sizeof(*data);
1702 }
1703
1704 static struct hwrng zcrypt_rng_dev = {
1705         .name           = "zcrypt",
1706         .data_read      = zcrypt_rng_data_read,
1707         .quality        = 990,
1708 };
1709
1710 int zcrypt_rng_device_add(void)
1711 {
1712         int rc = 0;
1713
1714         mutex_lock(&zcrypt_rng_mutex);
1715         if (zcrypt_rng_device_count == 0) {
1716                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1717                 if (!zcrypt_rng_buffer) {
1718                         rc = -ENOMEM;
1719                         goto out;
1720                 }
1721                 zcrypt_rng_buffer_index = 0;
1722                 if (!zcrypt_hwrng_seed)
1723                         zcrypt_rng_dev.quality = 0;
1724                 rc = hwrng_register(&zcrypt_rng_dev);
1725                 if (rc)
1726                         goto out_free;
1727                 zcrypt_rng_device_count = 1;
1728         } else
1729                 zcrypt_rng_device_count++;
1730         mutex_unlock(&zcrypt_rng_mutex);
1731         return 0;
1732
1733 out_free:
1734         free_page((unsigned long) zcrypt_rng_buffer);
1735 out:
1736         mutex_unlock(&zcrypt_rng_mutex);
1737         return rc;
1738 }
1739
1740 void zcrypt_rng_device_remove(void)
1741 {
1742         mutex_lock(&zcrypt_rng_mutex);
1743         zcrypt_rng_device_count--;
1744         if (zcrypt_rng_device_count == 0) {
1745                 hwrng_unregister(&zcrypt_rng_dev);
1746                 free_page((unsigned long) zcrypt_rng_buffer);
1747         }
1748         mutex_unlock(&zcrypt_rng_mutex);
1749 }
1750
1751 int __init zcrypt_debug_init(void)
1752 {
1753         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1754                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
1755         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1756         debug_set_level(zcrypt_dbf_info, DBF_ERR);
1757
1758         return 0;
1759 }
1760
1761 void zcrypt_debug_exit(void)
1762 {
1763         debug_unregister(zcrypt_dbf_info);
1764 }
1765
1766 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1767
1768 static int __init zcdn_init(void)
1769 {
1770         int rc;
1771
1772         /* create a new class 'zcrypt' */
1773         zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
1774         if (IS_ERR(zcrypt_class)) {
1775                 rc = PTR_ERR(zcrypt_class);
1776                 goto out_class_create_failed;
1777         }
1778         zcrypt_class->dev_release = zcdn_device_release;
1779
1780         /* alloc device minor range */
1781         rc = alloc_chrdev_region(&zcrypt_devt,
1782                                  0, ZCRYPT_MAX_MINOR_NODES,
1783                                  ZCRYPT_NAME);
1784         if (rc)
1785                 goto out_alloc_chrdev_failed;
1786
1787         cdev_init(&zcrypt_cdev, &zcrypt_fops);
1788         zcrypt_cdev.owner = THIS_MODULE;
1789         rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1790         if (rc)
1791                 goto out_cdev_add_failed;
1792
1793         /* need some class specific sysfs attributes */
1794         rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
1795         if (rc)
1796                 goto out_class_create_file_1_failed;
1797         rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
1798         if (rc)
1799                 goto out_class_create_file_2_failed;
1800
1801         return 0;
1802
1803 out_class_create_file_2_failed:
1804         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1805 out_class_create_file_1_failed:
1806         cdev_del(&zcrypt_cdev);
1807 out_cdev_add_failed:
1808         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1809 out_alloc_chrdev_failed:
1810         class_destroy(zcrypt_class);
1811 out_class_create_failed:
1812         return rc;
1813 }
1814
1815 static void zcdn_exit(void)
1816 {
1817         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1818         class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
1819         zcdn_destroy_all();
1820         cdev_del(&zcrypt_cdev);
1821         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1822         class_destroy(zcrypt_class);
1823 }
1824
1825 #endif
1826
1827 /**
1828  * zcrypt_api_init(): Module initialization.
1829  *
1830  * The module initialization code.
1831  */
1832 int __init zcrypt_api_init(void)
1833 {
1834         int rc;
1835
1836         rc = zcrypt_debug_init();
1837         if (rc)
1838                 goto out;
1839
1840 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1841         rc = zcdn_init();
1842         if (rc)
1843                 goto out;
1844 #endif
1845
1846         /* Register the request sprayer. */
1847         rc = misc_register(&zcrypt_misc_device);
1848         if (rc < 0)
1849                 goto out_misc_register_failed;
1850
1851         zcrypt_msgtype6_init();
1852         zcrypt_msgtype50_init();
1853
1854         return 0;
1855
1856 out_misc_register_failed:
1857 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1858         zcdn_exit();
1859 #endif
1860         zcrypt_debug_exit();
1861 out:
1862         return rc;
1863 }
1864
1865 /**
1866  * zcrypt_api_exit(): Module termination.
1867  *
1868  * The module termination code.
1869  */
1870 void __exit zcrypt_api_exit(void)
1871 {
1872 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1873         zcdn_exit();
1874 #endif
1875         misc_deregister(&zcrypt_misc_device);
1876         zcrypt_msgtype6_exit();
1877         zcrypt_msgtype50_exit();
1878         zcrypt_ccamisc_exit();
1879         zcrypt_debug_exit();
1880 }
1881
1882 module_init(zcrypt_api_init);
1883 module_exit(zcrypt_api_exit);