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 #include "zcrypt_ep11misc.h"
  40
  41 /*
  42  * Module description.
  43  */
  44 MODULE_AUTHOR("IBM Corporation");
  45 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
  46                    "Copyright IBM Corp. 2001, 2012");
  47 MODULE_LICENSE("GPL");
  48
  49 /*
  50  * zcrypt tracepoint functions
  51  */
  52 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
  53 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
  54
  55 static int zcrypt_hwrng_seed = 1;
  56 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
  57 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
  58
  59 DEFINE_SPINLOCK(zcrypt_list_lock);
  60 LIST_HEAD(zcrypt_card_list);
  61 int zcrypt_device_count;
  62
  63 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
  64 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
  65
  66 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
  67 EXPORT_SYMBOL(zcrypt_rescan_req);
  68
  69 static LIST_HEAD(zcrypt_ops_list);
  70
  71 /* Zcrypt related debug feature stuff. */
  72 debug_info_t *zcrypt_dbf_info;
  73
  74 /**
  75  * Process a rescan of the transport layer.
  76  *
  77  * Returns 1, if the rescan has been processed, otherwise 0.
  78  */
  79 static inline int zcrypt_process_rescan(void)
  80 {
  81         if (atomic_read(&zcrypt_rescan_req)) {
  82                 atomic_set(&zcrypt_rescan_req, 0);
  83                 atomic_inc(&zcrypt_rescan_count);
  84                 ap_bus_force_rescan();
  85                 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
  86                            atomic_inc_return(&zcrypt_rescan_count));
  87                 return 1;
  88         }
  89         return 0;
  90 }
  91
  92 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
  93 {
  94         list_add_tail(&zops->list, &zcrypt_ops_list);
  95 }
  96
  97 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
  98 {
  99         list_del_init(&zops->list);
 100 }
 101
 102 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
 103 {
 104         struct zcrypt_ops *zops;
 105
 106         list_for_each_entry(zops, &zcrypt_ops_list, list)
 107                 if ((zops->variant == variant) &&
 108                     (!strncmp(zops->name, name, sizeof(zops->name))))
 109                         return zops;
 110         return NULL;
 111 }
 112 EXPORT_SYMBOL(zcrypt_msgtype);
 113
 114 /*
 115  * Multi device nodes extension functions.
 116  */
 117
 118 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 119
 120 struct zcdn_device;
 121
 122 static struct class *zcrypt_class;
 123 static dev_t zcrypt_devt;
 124 static struct cdev zcrypt_cdev;
 125
 126 struct zcdn_device {
 127         struct device device;
 128         struct ap_perms perms;
 129 };
 130
 131 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
 132
 133 #define ZCDN_MAX_NAME 32
 134
 135 static int zcdn_create(const char *name);
 136 static int zcdn_destroy(const char *name);
 137
 138 /*
 139  * Find zcdn device by name.
 140  * Returns reference to the zcdn device which needs to be released
 141  * with put_device() after use.
 142  */
 143 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
 144 {
 145         struct device *dev = class_find_device_by_name(zcrypt_class, name);
 146
 147         return dev ? to_zcdn_dev(dev) : NULL;
 148 }
 149
 150 /*
 151  * Find zcdn device by devt value.
 152  * Returns reference to the zcdn device which needs to be released
 153  * with put_device() after use.
 154  */
 155 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
 156 {
 157         struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
 158
 159         return dev ? to_zcdn_dev(dev) : NULL;
 160 }
 161
 162 static ssize_t ioctlmask_show(struct device *dev,
 163                               struct device_attribute *attr,
 164                               char *buf)
 165 {
 166         int i, rc;
 167         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 168
 169         if (mutex_lock_interruptible(&ap_perms_mutex))
 170                 return -ERESTARTSYS;
 171
 172         buf[0] = '0';
 173         buf[1] = 'x';
 174         for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
 175                 snprintf(buf + 2 + 2 * i * sizeof(long),
 176                          PAGE_SIZE - 2 - 2 * i * sizeof(long),
 177                          "%016lx", zcdndev->perms.ioctlm[i]);
 178         buf[2 + 2 * i * sizeof(long)] = '\n';
 179         buf[2 + 2 * i * sizeof(long) + 1] = '\0';
 180         rc = 2 + 2 * i * sizeof(long) + 1;
 181
 182         mutex_unlock(&ap_perms_mutex);
 183
 184         return rc;
 185 }
 186
 187 static ssize_t ioctlmask_store(struct device *dev,
 188                                struct device_attribute *attr,
 189                                const char *buf, size_t count)
 190 {
 191         int rc;
 192         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 193
 194         rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
 195                                AP_IOCTLS, &ap_perms_mutex);
 196         if (rc)
 197                 return rc;
 198
 199         return count;
 200 }
 201
 202 static DEVICE_ATTR_RW(ioctlmask);
 203
 204 static ssize_t apmask_show(struct device *dev,
 205                            struct device_attribute *attr,
 206                            char *buf)
 207 {
 208         int i, rc;
 209         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 210
 211         if (mutex_lock_interruptible(&ap_perms_mutex))
 212                 return -ERESTARTSYS;
 213
 214         buf[0] = '0';
 215         buf[1] = 'x';
 216         for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
 217                 snprintf(buf + 2 + 2 * i * sizeof(long),
 218                          PAGE_SIZE - 2 - 2 * i * sizeof(long),
 219                          "%016lx", zcdndev->perms.apm[i]);
 220         buf[2 + 2 * i * sizeof(long)] = '\n';
 221         buf[2 + 2 * i * sizeof(long) + 1] = '\0';
 222         rc = 2 + 2 * i * sizeof(long) + 1;
 223
 224         mutex_unlock(&ap_perms_mutex);
 225
 226         return rc;
 227 }
 228
 229 static ssize_t apmask_store(struct device *dev,
 230                             struct device_attribute *attr,
 231                             const char *buf, size_t count)
 232 {
 233         int rc;
 234         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 235
 236         rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
 237                                AP_DEVICES, &ap_perms_mutex);
 238         if (rc)
 239                 return rc;
 240
 241         return count;
 242 }
 243
 244 static DEVICE_ATTR_RW(apmask);
 245
 246 static ssize_t aqmask_show(struct device *dev,
 247                            struct device_attribute *attr,
 248                            char *buf)
 249 {
 250         int i, rc;
 251         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 252
 253         if (mutex_lock_interruptible(&ap_perms_mutex))
 254                 return -ERESTARTSYS;
 255
 256         buf[0] = '0';
 257         buf[1] = 'x';
 258         for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
 259                 snprintf(buf + 2 + 2 * i * sizeof(long),
 260                          PAGE_SIZE - 2 - 2 * i * sizeof(long),
 261                          "%016lx", zcdndev->perms.aqm[i]);
 262         buf[2 + 2 * i * sizeof(long)] = '\n';
 263         buf[2 + 2 * i * sizeof(long) + 1] = '\0';
 264         rc = 2 + 2 * i * sizeof(long) + 1;
 265
 266         mutex_unlock(&ap_perms_mutex);
 267
 268         return rc;
 269 }
 270
 271 static ssize_t aqmask_store(struct device *dev,
 272                             struct device_attribute *attr,
 273                             const char *buf, size_t count)
 274 {
 275         int rc;
 276         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 277
 278         rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
 279                                AP_DOMAINS, &ap_perms_mutex);
 280         if (rc)
 281                 return rc;
 282
 283         return count;
 284 }
 285
 286 static DEVICE_ATTR_RW(aqmask);
 287
 288 static struct attribute *zcdn_dev_attrs[] = {
 289         &dev_attr_ioctlmask.attr,
 290         &dev_attr_apmask.attr,
 291         &dev_attr_aqmask.attr,
 292         NULL
 293 };
 294
 295 static struct attribute_group zcdn_dev_attr_group = {
 296         .attrs = zcdn_dev_attrs
 297 };
 298
 299 static const struct attribute_group *zcdn_dev_attr_groups[] = {
 300         &zcdn_dev_attr_group,
 301         NULL
 302 };
 303
 304 static ssize_t zcdn_create_store(struct class *class,
 305                                  struct class_attribute *attr,
 306                                  const char *buf, size_t count)
 307 {
 308         int rc;
 309         char name[ZCDN_MAX_NAME];
 310
 311         strncpy(name, skip_spaces(buf), sizeof(name));
 312         name[sizeof(name) - 1] = '\0';
 313
 314         rc = zcdn_create(strim(name));
 315
 316         return rc ? rc : count;
 317 }
 318
 319 static const struct class_attribute class_attr_zcdn_create =
 320         __ATTR(create, 0600, NULL, zcdn_create_store);
 321
 322 static ssize_t zcdn_destroy_store(struct class *class,
 323                                   struct class_attribute *attr,
 324                                   const char *buf, size_t count)
 325 {
 326         int rc;
 327         char name[ZCDN_MAX_NAME];
 328
 329         strncpy(name, skip_spaces(buf), sizeof(name));
 330         name[sizeof(name) - 1] = '\0';
 331
 332         rc = zcdn_destroy(strim(name));
 333
 334         return rc ? rc : count;
 335 }
 336
 337 static const struct class_attribute class_attr_zcdn_destroy =
 338         __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
 339
 340 static void zcdn_device_release(struct device *dev)
 341 {
 342         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 343
 344         ZCRYPT_DBF(DBF_INFO, "releasing zcdn device %d:%d\n",
 345                    MAJOR(dev->devt), MINOR(dev->devt));
 346
 347         kfree(zcdndev);
 348 }
 349
 350 static int zcdn_create(const char *name)
 351 {
 352         dev_t devt;
 353         int i, rc = 0;
 354         char nodename[ZCDN_MAX_NAME];
 355         struct zcdn_device *zcdndev;
 356
 357         if (mutex_lock_interruptible(&ap_perms_mutex))
 358                 return -ERESTARTSYS;
 359
 360         /* check if device node with this name already exists */
 361         if (name[0]) {
 362                 zcdndev = find_zcdndev_by_name(name);
 363                 if (zcdndev) {
 364                         put_device(&zcdndev->device);
 365                         rc = -EEXIST;
 366                         goto unlockout;
 367                 }
 368         }
 369
 370         /* find an unused minor number */
 371         for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
 372                 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
 373                 zcdndev = find_zcdndev_by_devt(devt);
 374                 if (zcdndev)
 375                         put_device(&zcdndev->device);
 376                 else
 377                         break;
 378         }
 379         if (i == ZCRYPT_MAX_MINOR_NODES) {
 380                 rc = -ENOSPC;
 381                 goto unlockout;
 382         }
 383
 384         /* alloc and prepare a new zcdn device */
 385         zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
 386         if (!zcdndev) {
 387                 rc = -ENOMEM;
 388                 goto unlockout;
 389         }
 390         zcdndev->device.release = zcdn_device_release;
 391         zcdndev->device.class = zcrypt_class;
 392         zcdndev->device.devt = devt;
 393         zcdndev->device.groups = zcdn_dev_attr_groups;
 394         if (name[0])
 395                 strncpy(nodename, name, sizeof(nodename));
 396         else
 397                 snprintf(nodename, sizeof(nodename),
 398                          ZCRYPT_NAME "_%d", (int) MINOR(devt));
 399         nodename[sizeof(nodename)-1] = '\0';
 400         if (dev_set_name(&zcdndev->device, nodename)) {
 401                 rc = -EINVAL;
 402                 goto unlockout;
 403         }
 404         rc = device_register(&zcdndev->device);
 405         if (rc) {
 406                 put_device(&zcdndev->device);
 407                 goto unlockout;
 408         }
 409
 410         ZCRYPT_DBF(DBF_INFO, "created zcdn device %d:%d\n",
 411                    MAJOR(devt), MINOR(devt));
 412
 413 unlockout:
 414         mutex_unlock(&ap_perms_mutex);
 415         return rc;
 416 }
 417
 418 static int zcdn_destroy(const char *name)
 419 {
 420         int rc = 0;
 421         struct zcdn_device *zcdndev;
 422
 423         if (mutex_lock_interruptible(&ap_perms_mutex))
 424                 return -ERESTARTSYS;
 425
 426         /* try to find this zcdn device */
 427         zcdndev = find_zcdndev_by_name(name);
 428         if (!zcdndev) {
 429                 rc = -ENOENT;
 430                 goto unlockout;
 431         }
 432
 433         /*
 434          * The zcdn device is not hard destroyed. It is subject to
 435          * reference counting and thus just needs to be unregistered.
 436          */
 437         put_device(&zcdndev->device);
 438         device_unregister(&zcdndev->device);
 439
 440 unlockout:
 441         mutex_unlock(&ap_perms_mutex);
 442         return rc;
 443 }
 444
 445 static void zcdn_destroy_all(void)
 446 {
 447         int i;
 448         dev_t devt;
 449         struct zcdn_device *zcdndev;
 450
 451         mutex_lock(&ap_perms_mutex);
 452         for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
 453                 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
 454                 zcdndev = find_zcdndev_by_devt(devt);
 455                 if (zcdndev) {
 456                         put_device(&zcdndev->device);
 457                         device_unregister(&zcdndev->device);
 458                 }
 459         }
 460         mutex_unlock(&ap_perms_mutex);
 461 }
 462
 463 #endif
 464
 465 /**
 466  * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
 467  *
 468  * This function is not supported beyond zcrypt 1.3.1.
 469  */
 470 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
 471                            size_t count, loff_t *f_pos)
 472 {
 473         return -EPERM;
 474 }
 475
 476 /**
 477  * zcrypt_write(): Not allowed.
 478  *
 479  * Write is is not allowed
 480  */
 481 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
 482                             size_t count, loff_t *f_pos)
 483 {
 484         return -EPERM;
 485 }
 486
 487 /**
 488  * zcrypt_open(): Count number of users.
 489  *
 490  * Device open function to count number of users.
 491  */
 492 static int zcrypt_open(struct inode *inode, struct file *filp)
 493 {
 494         struct ap_perms *perms = &ap_perms;
 495
 496 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 497         if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 498                 struct zcdn_device *zcdndev;
 499
 500                 if (mutex_lock_interruptible(&ap_perms_mutex))
 501                         return -ERESTARTSYS;
 502                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 503                 /* find returns a reference, no get_device() needed */
 504                 mutex_unlock(&ap_perms_mutex);
 505                 if (zcdndev)
 506                         perms = &zcdndev->perms;
 507         }
 508 #endif
 509         filp->private_data = (void *) perms;
 510
 511         atomic_inc(&zcrypt_open_count);
 512         return stream_open(inode, filp);
 513 }
 514
 515 /**
 516  * zcrypt_release(): Count number of users.
 517  *
 518  * Device close function to count number of users.
 519  */
 520 static int zcrypt_release(struct inode *inode, struct file *filp)
 521 {
 522 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
 523         if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 524                 struct zcdn_device *zcdndev;
 525
 526                 mutex_lock(&ap_perms_mutex);
 527                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 528                 mutex_unlock(&ap_perms_mutex);
 529                 if (zcdndev) {
 530                         /* 2 puts here: one for find, one for open */
 531                         put_device(&zcdndev->device);
 532                         put_device(&zcdndev->device);
 533                 }
 534         }
 535 #endif
 536
 537         atomic_dec(&zcrypt_open_count);
 538         return 0;
 539 }
 540
 541 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
 542                                      unsigned int cmd)
 543 {
 544         int rc = -EPERM;
 545         int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
 546
 547         if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
 548                 if (test_bit_inv(ioctlnr, perms->ioctlm))
 549                         rc = 0;
 550         }
 551
 552         if (rc)
 553                 ZCRYPT_DBF(DBF_WARN,
 554                            "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
 555                            ioctlnr, rc);
 556
 557         return rc;
 558 }
 559
 560 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
 561 {
 562         return test_bit_inv(card, perms->apm) ? true : false;
 563 }
 564
 565 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
 566 {
 567         return test_bit_inv(queue, perms->aqm) ? true : false;
 568 }
 569
 570 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
 571                                                      struct zcrypt_queue *zq,
 572                                                      struct module **pmod,
 573                                                      unsigned int weight)
 574 {
 575         if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
 576                 return NULL;
 577         zcrypt_queue_get(zq);
 578         get_device(&zq->queue->ap_dev.device);
 579         atomic_add(weight, &zc->load);
 580         atomic_add(weight, &zq->load);
 581         zq->request_count++;
 582         *pmod = zq->queue->ap_dev.drv->driver.owner;
 583         return zq;
 584 }
 585
 586 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
 587                                      struct zcrypt_queue *zq,
 588                                      struct module *mod,
 589                                      unsigned int weight)
 590 {
 591         zq->request_count--;
 592         atomic_sub(weight, &zc->load);
 593         atomic_sub(weight, &zq->load);
 594         put_device(&zq->queue->ap_dev.device);
 595         zcrypt_queue_put(zq);
 596         module_put(mod);
 597 }
 598
 599 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
 600                                        struct zcrypt_card *pref_zc,
 601                                        unsigned int weight,
 602                                        unsigned int pref_weight)
 603 {
 604         if (!pref_zc)
 605                 return false;
 606         weight += atomic_read(&zc->load);
 607         pref_weight += atomic_read(&pref_zc->load);
 608         if (weight == pref_weight)
 609                 return atomic64_read(&zc->card->total_request_count) >
 610                         atomic64_read(&pref_zc->card->total_request_count);
 611         return weight > pref_weight;
 612 }
 613
 614 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
 615                                         struct zcrypt_queue *pref_zq,
 616                                         unsigned int weight,
 617                                         unsigned int pref_weight)
 618 {
 619         if (!pref_zq)
 620                 return false;
 621         weight += atomic_read(&zq->load);
 622         pref_weight += atomic_read(&pref_zq->load);
 623         if (weight == pref_weight)
 624                 return zq->queue->total_request_count >
 625                         pref_zq->queue->total_request_count;
 626         return weight > pref_weight;
 627 }
 628
 629 /*
 630  * zcrypt ioctls.
 631  */
 632 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
 633                                struct ica_rsa_modexpo *mex)
 634 {
 635         struct zcrypt_card *zc, *pref_zc;
 636         struct zcrypt_queue *zq, *pref_zq;
 637         unsigned int weight = 0, pref_weight = 0;
 638         unsigned int func_code;
 639         int qid = 0, rc = -ENODEV;
 640         struct module *mod;
 641
 642         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
 643
 644         if (mex->outputdatalength < mex->inputdatalength) {
 645                 func_code = 0;
 646                 rc = -EINVAL;
 647                 goto out;
 648         }
 649
 650         /*
 651          * As long as outputdatalength is big enough, we can set the
 652          * outputdatalength equal to the inputdatalength, since that is the
 653          * number of bytes we will copy in any case
 654          */
 655         mex->outputdatalength = mex->inputdatalength;
 656
 657         rc = get_rsa_modex_fc(mex, &func_code);
 658         if (rc)
 659                 goto out;
 660
 661         pref_zc = NULL;
 662         pref_zq = NULL;
 663         spin_lock(&zcrypt_list_lock);
 664         for_each_zcrypt_card(zc) {
 665                 /* Check for online accelarator and CCA cards */
 666                 if (!zc->online || !(zc->card->functions & 0x18000000))
 667                         continue;
 668                 /* Check for size limits */
 669                 if (zc->min_mod_size > mex->inputdatalength ||
 670                     zc->max_mod_size < mex->inputdatalength)
 671                         continue;
 672                 /* check if device node has admission for this card */
 673                 if (!zcrypt_check_card(perms, zc->card->id))
 674                         continue;
 675                 /* get weight index of the card device  */
 676                 weight = zc->speed_rating[func_code];
 677                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 678                         continue;
 679                 for_each_zcrypt_queue(zq, zc) {
 680                         /* check if device is online and eligible */
 681                         if (!zq->online || !zq->ops->rsa_modexpo)
 682                                 continue;
 683                         /* check if device node has admission for this queue */
 684                         if (!zcrypt_check_queue(perms,
 685                                                 AP_QID_QUEUE(zq->queue->qid)))
 686                                 continue;
 687                         if (zcrypt_queue_compare(zq, pref_zq,
 688                                                  weight, pref_weight))
 689                                 continue;
 690                         pref_zc = zc;
 691                         pref_zq = zq;
 692                         pref_weight = weight;
 693                 }
 694         }
 695         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 696         spin_unlock(&zcrypt_list_lock);
 697
 698         if (!pref_zq) {
 699                 rc = -ENODEV;
 700                 goto out;
 701         }
 702
 703         qid = pref_zq->queue->qid;
 704         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
 705
 706         spin_lock(&zcrypt_list_lock);
 707         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 708         spin_unlock(&zcrypt_list_lock);
 709
 710 out:
 711         trace_s390_zcrypt_rep(mex, func_code, rc,
 712                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 713         return rc;
 714 }
 715
 716 static long zcrypt_rsa_crt(struct ap_perms *perms,
 717                            struct ica_rsa_modexpo_crt *crt)
 718 {
 719         struct zcrypt_card *zc, *pref_zc;
 720         struct zcrypt_queue *zq, *pref_zq;
 721         unsigned int weight = 0, pref_weight = 0;
 722         unsigned int func_code;
 723         int qid = 0, rc = -ENODEV;
 724         struct module *mod;
 725
 726         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
 727
 728         if (crt->outputdatalength < crt->inputdatalength) {
 729                 func_code = 0;
 730                 rc = -EINVAL;
 731                 goto out;
 732         }
 733
 734         /*
 735          * As long as outputdatalength is big enough, we can set the
 736          * outputdatalength equal to the inputdatalength, since that is the
 737          * number of bytes we will copy in any case
 738          */
 739         crt->outputdatalength = crt->inputdatalength;
 740
 741         rc = get_rsa_crt_fc(crt, &func_code);
 742         if (rc)
 743                 goto out;
 744
 745         pref_zc = NULL;
 746         pref_zq = NULL;
 747         spin_lock(&zcrypt_list_lock);
 748         for_each_zcrypt_card(zc) {
 749                 /* Check for online accelarator and CCA cards */
 750                 if (!zc->online || !(zc->card->functions & 0x18000000))
 751                         continue;
 752                 /* Check for size limits */
 753                 if (zc->min_mod_size > crt->inputdatalength ||
 754                     zc->max_mod_size < crt->inputdatalength)
 755                         continue;
 756                 /* check if device node has admission for this card */
 757                 if (!zcrypt_check_card(perms, zc->card->id))
 758                         continue;
 759                 /* get weight index of the card device  */
 760                 weight = zc->speed_rating[func_code];
 761                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 762                         continue;
 763                 for_each_zcrypt_queue(zq, zc) {
 764                         /* check if device is online and eligible */
 765                         if (!zq->online || !zq->ops->rsa_modexpo_crt)
 766                                 continue;
 767                         /* check if device node has admission for this queue */
 768                         if (!zcrypt_check_queue(perms,
 769                                                 AP_QID_QUEUE(zq->queue->qid)))
 770                                 continue;
 771                         if (zcrypt_queue_compare(zq, pref_zq,
 772                                                  weight, pref_weight))
 773                                 continue;
 774                         pref_zc = zc;
 775                         pref_zq = zq;
 776                         pref_weight = weight;
 777                 }
 778         }
 779         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 780         spin_unlock(&zcrypt_list_lock);
 781
 782         if (!pref_zq) {
 783                 rc = -ENODEV;
 784                 goto out;
 785         }
 786
 787         qid = pref_zq->queue->qid;
 788         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
 789
 790         spin_lock(&zcrypt_list_lock);
 791         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 792         spin_unlock(&zcrypt_list_lock);
 793
 794 out:
 795         trace_s390_zcrypt_rep(crt, func_code, rc,
 796                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 797         return rc;
 798 }
 799
 800 static long _zcrypt_send_cprb(struct ap_perms *perms,
 801                               struct ica_xcRB *xcRB)
 802 {
 803         struct zcrypt_card *zc, *pref_zc;
 804         struct zcrypt_queue *zq, *pref_zq;
 805         struct ap_message ap_msg;
 806         unsigned int weight = 0, pref_weight = 0;
 807         unsigned int func_code;
 808         unsigned short *domain, tdom;
 809         int qid = 0, rc = -ENODEV;
 810         struct module *mod;
 811
 812         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
 813
 814         xcRB->status = 0;
 815         ap_init_message(&ap_msg);
 816         rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
 817         if (rc)
 818                 goto out;
 819
 820         /*
 821          * If a valid target domain is set and this domain is NOT a usage
 822          * domain but a control only domain, use the default domain as target.
 823          */
 824         tdom = *domain;
 825         if (tdom < AP_DOMAINS &&
 826             !ap_test_config_usage_domain(tdom) &&
 827             ap_test_config_ctrl_domain(tdom) &&
 828             ap_domain_index >= 0)
 829                 tdom = ap_domain_index;
 830
 831         pref_zc = NULL;
 832         pref_zq = NULL;
 833         spin_lock(&zcrypt_list_lock);
 834         for_each_zcrypt_card(zc) {
 835                 /* Check for online CCA cards */
 836                 if (!zc->online || !(zc->card->functions & 0x10000000))
 837                         continue;
 838                 /* Check for user selected CCA card */
 839                 if (xcRB->user_defined != AUTOSELECT &&
 840                     xcRB->user_defined != zc->card->id)
 841                         continue;
 842                 /* check if device node has admission for this card */
 843                 if (!zcrypt_check_card(perms, zc->card->id))
 844                         continue;
 845                 /* get weight index of the card device  */
 846                 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 847                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 848                         continue;
 849                 for_each_zcrypt_queue(zq, zc) {
 850                         /* check if device is online and eligible */
 851                         if (!zq->online ||
 852                             !zq->ops->send_cprb ||
 853                             (tdom != AUTOSEL_DOM &&
 854                              tdom != AP_QID_QUEUE(zq->queue->qid)))
 855                                 continue;
 856                         /* check if device node has admission for this queue */
 857                         if (!zcrypt_check_queue(perms,
 858                                                 AP_QID_QUEUE(zq->queue->qid)))
 859                                 continue;
 860                         if (zcrypt_queue_compare(zq, pref_zq,
 861                                                  weight, pref_weight))
 862                                 continue;
 863                         pref_zc = zc;
 864                         pref_zq = zq;
 865                         pref_weight = weight;
 866                 }
 867         }
 868         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
 869         spin_unlock(&zcrypt_list_lock);
 870
 871         if (!pref_zq) {
 872                 rc = -ENODEV;
 873                 goto out;
 874         }
 875
 876         /* in case of auto select, provide the correct domain */
 877         qid = pref_zq->queue->qid;
 878         if (*domain == AUTOSEL_DOM)
 879                 *domain = AP_QID_QUEUE(qid);
 880
 881         rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
 882
 883         spin_lock(&zcrypt_list_lock);
 884         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
 885         spin_unlock(&zcrypt_list_lock);
 886
 887 out:
 888         ap_release_message(&ap_msg);
 889         trace_s390_zcrypt_rep(xcRB, func_code, rc,
 890                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 891         return rc;
 892 }
 893
 894 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
 895 {
 896         return _zcrypt_send_cprb(&ap_perms, xcRB);
 897 }
 898 EXPORT_SYMBOL(zcrypt_send_cprb);
 899
 900 static bool is_desired_ep11_card(unsigned int dev_id,
 901                                  unsigned short target_num,
 902                                  struct ep11_target_dev *targets)
 903 {
 904         while (target_num-- > 0) {
 905                 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
 906                         return true;
 907                 targets++;
 908         }
 909         return false;
 910 }
 911
 912 static bool is_desired_ep11_queue(unsigned int dev_qid,
 913                                   unsigned short target_num,
 914                                   struct ep11_target_dev *targets)
 915 {
 916         int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
 917
 918         while (target_num-- > 0) {
 919                 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
 920                     (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
 921                         return true;
 922                 targets++;
 923         }
 924         return false;
 925 }
 926
 927 static long _zcrypt_send_ep11_cprb(struct ap_perms *perms,
 928                                    struct ep11_urb *xcrb)
 929 {
 930         struct zcrypt_card *zc, *pref_zc;
 931         struct zcrypt_queue *zq, *pref_zq;
 932         struct ep11_target_dev *targets;
 933         unsigned short target_num;
 934         unsigned int weight = 0, pref_weight = 0;
 935         unsigned int func_code;
 936         struct ap_message ap_msg;
 937         int qid = 0, rc = -ENODEV;
 938         struct module *mod;
 939
 940         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
 941
 942         ap_init_message(&ap_msg);
 943
 944         target_num = (unsigned short) xcrb->targets_num;
 945
 946         /* empty list indicates autoselect (all available targets) */
 947         targets = NULL;
 948         if (target_num != 0) {
 949                 struct ep11_target_dev __user *uptr;
 950
 951                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
 952                 if (!targets) {
 953                         func_code = 0;
 954                         rc = -ENOMEM;
 955                         goto out;
 956                 }
 957
 958                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
 959                 if (copy_from_user(targets, uptr,
 960                                    target_num * sizeof(*targets))) {
 961                         func_code = 0;
 962                         rc = -EFAULT;
 963                         goto out_free;
 964                 }
 965         }
 966
 967         rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
 968         if (rc)
 969                 goto out_free;
 970
 971         pref_zc = NULL;
 972         pref_zq = NULL;
 973         spin_lock(&zcrypt_list_lock);
 974         for_each_zcrypt_card(zc) {
 975                 /* Check for online EP11 cards */
 976                 if (!zc->online || !(zc->card->functions & 0x04000000))
 977                         continue;
 978                 /* Check for user selected EP11 card */
 979                 if (targets &&
 980                     !is_desired_ep11_card(zc->card->id, target_num, targets))
 981                         continue;
 982                 /* check if device node has admission for this card */
 983                 if (!zcrypt_check_card(perms, zc->card->id))
 984                         continue;
 985                 /* get weight index of the card device  */
 986                 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
 987                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 988                         continue;
 989                 for_each_zcrypt_queue(zq, zc) {
 990                         /* check if device is online and eligible */
 991                         if (!zq->online ||
 992                             !zq->ops->send_ep11_cprb ||
 993                             (targets &&
 994                              !is_desired_ep11_queue(zq->queue->qid,
 995                                                     target_num, targets)))
 996                                 continue;
 997                         /* check if device node has admission for this queue */
 998                         if (!zcrypt_check_queue(perms,
 999                                                 AP_QID_QUEUE(zq->queue->qid)))
1000                                 continue;
1001                         if (zcrypt_queue_compare(zq, pref_zq,
1002                                                  weight, pref_weight))
1003                                 continue;
1004                         pref_zc = zc;
1005                         pref_zq = zq;
1006                         pref_weight = weight;
1007                 }
1008         }
1009         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1010         spin_unlock(&zcrypt_list_lock);
1011
1012         if (!pref_zq) {
1013                 rc = -ENODEV;
1014                 goto out_free;
1015         }
1016
1017         qid = pref_zq->queue->qid;
1018         rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
1019
1020         spin_lock(&zcrypt_list_lock);
1021         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1022         spin_unlock(&zcrypt_list_lock);
1023
1024 out_free:
1025         kfree(targets);
1026 out:
1027         ap_release_message(&ap_msg);
1028         trace_s390_zcrypt_rep(xcrb, func_code, rc,
1029                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1030         return rc;
1031 }
1032
1033 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1034 {
1035         return _zcrypt_send_ep11_cprb(&ap_perms, xcrb);
1036 }
1037 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1038
1039 static long zcrypt_rng(char *buffer)
1040 {
1041         struct zcrypt_card *zc, *pref_zc;
1042         struct zcrypt_queue *zq, *pref_zq;
1043         unsigned int weight = 0, pref_weight = 0;
1044         unsigned int func_code;
1045         struct ap_message ap_msg;
1046         unsigned int domain;
1047         int qid = 0, rc = -ENODEV;
1048         struct module *mod;
1049
1050         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1051
1052         ap_init_message(&ap_msg);
1053         rc = get_rng_fc(&ap_msg, &func_code, &domain);
1054         if (rc)
1055                 goto out;
1056
1057         pref_zc = NULL;
1058         pref_zq = NULL;
1059         spin_lock(&zcrypt_list_lock);
1060         for_each_zcrypt_card(zc) {
1061                 /* Check for online CCA cards */
1062                 if (!zc->online || !(zc->card->functions & 0x10000000))
1063                         continue;
1064                 /* get weight index of the card device  */
1065                 weight = zc->speed_rating[func_code];
1066                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1067                         continue;
1068                 for_each_zcrypt_queue(zq, zc) {
1069                         /* check if device is online and eligible */
1070                         if (!zq->online || !zq->ops->rng)
1071                                 continue;
1072                         if (zcrypt_queue_compare(zq, pref_zq,
1073                                                  weight, pref_weight))
1074                                 continue;
1075                         pref_zc = zc;
1076                         pref_zq = zq;
1077                         pref_weight = weight;
1078                 }
1079         }
1080         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1081         spin_unlock(&zcrypt_list_lock);
1082
1083         if (!pref_zq) {
1084                 rc = -ENODEV;
1085                 goto out;
1086         }
1087
1088         qid = pref_zq->queue->qid;
1089         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1090
1091         spin_lock(&zcrypt_list_lock);
1092         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1093         spin_unlock(&zcrypt_list_lock);
1094
1095 out:
1096         ap_release_message(&ap_msg);
1097         trace_s390_zcrypt_rep(buffer, func_code, rc,
1098                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1099         return rc;
1100 }
1101
1102 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1103 {
1104         struct zcrypt_card *zc;
1105         struct zcrypt_queue *zq;
1106         struct zcrypt_device_status *stat;
1107         int card, queue;
1108
1109         memset(devstatus, 0, MAX_ZDEV_ENTRIES
1110                * sizeof(struct zcrypt_device_status));
1111
1112         spin_lock(&zcrypt_list_lock);
1113         for_each_zcrypt_card(zc) {
1114                 for_each_zcrypt_queue(zq, zc) {
1115                         card = AP_QID_CARD(zq->queue->qid);
1116                         if (card >= MAX_ZDEV_CARDIDS)
1117                                 continue;
1118                         queue = AP_QID_QUEUE(zq->queue->qid);
1119                         stat = &devstatus[card * AP_DOMAINS + queue];
1120                         stat->hwtype = zc->card->ap_dev.device_type;
1121                         stat->functions = zc->card->functions >> 26;
1122                         stat->qid = zq->queue->qid;
1123                         stat->online = zq->online ? 0x01 : 0x00;
1124                 }
1125         }
1126         spin_unlock(&zcrypt_list_lock);
1127 }
1128
1129 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1130 {
1131         struct zcrypt_card *zc;
1132         struct zcrypt_queue *zq;
1133         struct zcrypt_device_status_ext *stat;
1134         int card, queue;
1135
1136         memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1137                * sizeof(struct zcrypt_device_status_ext));
1138
1139         spin_lock(&zcrypt_list_lock);
1140         for_each_zcrypt_card(zc) {
1141                 for_each_zcrypt_queue(zq, zc) {
1142                         card = AP_QID_CARD(zq->queue->qid);
1143                         queue = AP_QID_QUEUE(zq->queue->qid);
1144                         stat = &devstatus[card * AP_DOMAINS + queue];
1145                         stat->hwtype = zc->card->ap_dev.device_type;
1146                         stat->functions = zc->card->functions >> 26;
1147                         stat->qid = zq->queue->qid;
1148                         stat->online = zq->online ? 0x01 : 0x00;
1149                 }
1150         }
1151         spin_unlock(&zcrypt_list_lock);
1152 }
1153 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1154
1155 int zcrypt_device_status_ext(int card, int queue,
1156                              struct zcrypt_device_status_ext *devstat)
1157 {
1158         struct zcrypt_card *zc;
1159         struct zcrypt_queue *zq;
1160
1161         memset(devstat, 0, sizeof(*devstat));
1162
1163         spin_lock(&zcrypt_list_lock);
1164         for_each_zcrypt_card(zc) {
1165                 for_each_zcrypt_queue(zq, zc) {
1166                         if (card == AP_QID_CARD(zq->queue->qid) &&
1167                             queue == AP_QID_QUEUE(zq->queue->qid)) {
1168                                 devstat->hwtype = zc->card->ap_dev.device_type;
1169                                 devstat->functions = zc->card->functions >> 26;
1170                                 devstat->qid = zq->queue->qid;
1171                                 devstat->online = zq->online ? 0x01 : 0x00;
1172                                 spin_unlock(&zcrypt_list_lock);
1173                                 return 0;
1174                         }
1175                 }
1176         }
1177         spin_unlock(&zcrypt_list_lock);
1178
1179         return -ENODEV;
1180 }
1181 EXPORT_SYMBOL(zcrypt_device_status_ext);
1182
1183 static void zcrypt_status_mask(char status[], size_t max_adapters)
1184 {
1185         struct zcrypt_card *zc;
1186         struct zcrypt_queue *zq;
1187         int card;
1188
1189         memset(status, 0, max_adapters);
1190         spin_lock(&zcrypt_list_lock);
1191         for_each_zcrypt_card(zc) {
1192                 for_each_zcrypt_queue(zq, zc) {
1193                         card = AP_QID_CARD(zq->queue->qid);
1194                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1195                             || card >= max_adapters)
1196                                 continue;
1197                         status[card] = zc->online ? zc->user_space_type : 0x0d;
1198                 }
1199         }
1200         spin_unlock(&zcrypt_list_lock);
1201 }
1202
1203 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1204 {
1205         struct zcrypt_card *zc;
1206         struct zcrypt_queue *zq;
1207         int card;
1208
1209         memset(qdepth, 0, max_adapters);
1210         spin_lock(&zcrypt_list_lock);
1211         local_bh_disable();
1212         for_each_zcrypt_card(zc) {
1213                 for_each_zcrypt_queue(zq, zc) {
1214                         card = AP_QID_CARD(zq->queue->qid);
1215                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1216                             || card >= max_adapters)
1217                                 continue;
1218                         spin_lock(&zq->queue->lock);
1219                         qdepth[card] =
1220                                 zq->queue->pendingq_count +
1221                                 zq->queue->requestq_count;
1222                         spin_unlock(&zq->queue->lock);
1223                 }
1224         }
1225         local_bh_enable();
1226         spin_unlock(&zcrypt_list_lock);
1227 }
1228
1229 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1230 {
1231         struct zcrypt_card *zc;
1232         struct zcrypt_queue *zq;
1233         int card;
1234         u64 cnt;
1235
1236         memset(reqcnt, 0, sizeof(int) * max_adapters);
1237         spin_lock(&zcrypt_list_lock);
1238         local_bh_disable();
1239         for_each_zcrypt_card(zc) {
1240                 for_each_zcrypt_queue(zq, zc) {
1241                         card = AP_QID_CARD(zq->queue->qid);
1242                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1243                             || card >= max_adapters)
1244                                 continue;
1245                         spin_lock(&zq->queue->lock);
1246                         cnt = zq->queue->total_request_count;
1247                         spin_unlock(&zq->queue->lock);
1248                         reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX;
1249                 }
1250         }
1251         local_bh_enable();
1252         spin_unlock(&zcrypt_list_lock);
1253 }
1254
1255 static int zcrypt_pendingq_count(void)
1256 {
1257         struct zcrypt_card *zc;
1258         struct zcrypt_queue *zq;
1259         int pendingq_count;
1260
1261         pendingq_count = 0;
1262         spin_lock(&zcrypt_list_lock);
1263         local_bh_disable();
1264         for_each_zcrypt_card(zc) {
1265                 for_each_zcrypt_queue(zq, zc) {
1266                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1267                                 continue;
1268                         spin_lock(&zq->queue->lock);
1269                         pendingq_count += zq->queue->pendingq_count;
1270                         spin_unlock(&zq->queue->lock);
1271                 }
1272         }
1273         local_bh_enable();
1274         spin_unlock(&zcrypt_list_lock);
1275         return pendingq_count;
1276 }
1277
1278 static int zcrypt_requestq_count(void)
1279 {
1280         struct zcrypt_card *zc;
1281         struct zcrypt_queue *zq;
1282         int requestq_count;
1283
1284         requestq_count = 0;
1285         spin_lock(&zcrypt_list_lock);
1286         local_bh_disable();
1287         for_each_zcrypt_card(zc) {
1288                 for_each_zcrypt_queue(zq, zc) {
1289                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1290                                 continue;
1291                         spin_lock(&zq->queue->lock);
1292                         requestq_count += zq->queue->requestq_count;
1293                         spin_unlock(&zq->queue->lock);
1294                 }
1295         }
1296         local_bh_enable();
1297         spin_unlock(&zcrypt_list_lock);
1298         return requestq_count;
1299 }
1300
1301 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1302 {
1303         int rc;
1304         struct ica_rsa_modexpo mex;
1305         struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1306
1307         if (copy_from_user(&mex, umex, sizeof(mex)))
1308                 return -EFAULT;
1309         do {
1310                 rc = zcrypt_rsa_modexpo(perms, &mex);
1311         } while (rc == -EAGAIN);
1312         /* on failure: retry once again after a requested rescan */
1313         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1314                 do {
1315                         rc = zcrypt_rsa_modexpo(perms, &mex);
1316                 } while (rc == -EAGAIN);
1317         if (rc) {
1318                 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1319                 return rc;
1320         }
1321         return put_user(mex.outputdatalength, &umex->outputdatalength);
1322 }
1323
1324 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1325 {
1326         int rc;
1327         struct ica_rsa_modexpo_crt crt;
1328         struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1329
1330         if (copy_from_user(&crt, ucrt, sizeof(crt)))
1331                 return -EFAULT;
1332         do {
1333                 rc = zcrypt_rsa_crt(perms, &crt);
1334         } while (rc == -EAGAIN);
1335         /* on failure: retry once again after a requested rescan */
1336         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1337                 do {
1338                         rc = zcrypt_rsa_crt(perms, &crt);
1339                 } while (rc == -EAGAIN);
1340         if (rc) {
1341                 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1342                 return rc;
1343         }
1344         return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1345 }
1346
1347 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1348 {
1349         int rc;
1350         struct ica_xcRB xcRB;
1351         struct ica_xcRB __user *uxcRB = (void __user *) arg;
1352
1353         if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1354                 return -EFAULT;
1355         do {
1356                 rc = _zcrypt_send_cprb(perms, &xcRB);
1357         } while (rc == -EAGAIN);
1358         /* on failure: retry once again after a requested rescan */
1359         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1360                 do {
1361                         rc = _zcrypt_send_cprb(perms, &xcRB);
1362                 } while (rc == -EAGAIN);
1363         if (rc)
1364                 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1365                            rc, xcRB.status);
1366         if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1367                 return -EFAULT;
1368         return rc;
1369 }
1370
1371 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1372 {
1373         int rc;
1374         struct ep11_urb xcrb;
1375         struct ep11_urb __user *uxcrb = (void __user *)arg;
1376
1377         if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1378                 return -EFAULT;
1379         do {
1380                 rc = _zcrypt_send_ep11_cprb(perms, &xcrb);
1381         } while (rc == -EAGAIN);
1382         /* on failure: retry once again after a requested rescan */
1383         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1384                 do {
1385                         rc = _zcrypt_send_ep11_cprb(perms, &xcrb);
1386                 } while (rc == -EAGAIN);
1387         if (rc)
1388                 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1389         if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1390                 return -EFAULT;
1391         return rc;
1392 }
1393
1394 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1395                                   unsigned long arg)
1396 {
1397         int rc;
1398         struct ap_perms *perms =
1399                 (struct ap_perms *) filp->private_data;
1400
1401         rc = zcrypt_check_ioctl(perms, cmd);
1402         if (rc)
1403                 return rc;
1404
1405         switch (cmd) {
1406         case ICARSAMODEXPO:
1407                 return icarsamodexpo_ioctl(perms, arg);
1408         case ICARSACRT:
1409                 return icarsacrt_ioctl(perms, arg);
1410         case ZSECSENDCPRB:
1411                 return zsecsendcprb_ioctl(perms, arg);
1412         case ZSENDEP11CPRB:
1413                 return zsendep11cprb_ioctl(perms, arg);
1414         case ZCRYPT_DEVICE_STATUS: {
1415                 struct zcrypt_device_status_ext *device_status;
1416                 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1417                         * sizeof(struct zcrypt_device_status_ext);
1418
1419                 device_status = kzalloc(total_size, GFP_KERNEL);
1420                 if (!device_status)
1421                         return -ENOMEM;
1422                 zcrypt_device_status_mask_ext(device_status);
1423                 if (copy_to_user((char __user *) arg, device_status,
1424                                  total_size))
1425                         rc = -EFAULT;
1426                 kfree(device_status);
1427                 return rc;
1428         }
1429         case ZCRYPT_STATUS_MASK: {
1430                 char status[AP_DEVICES];
1431
1432                 zcrypt_status_mask(status, AP_DEVICES);
1433                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1434                         return -EFAULT;
1435                 return 0;
1436         }
1437         case ZCRYPT_QDEPTH_MASK: {
1438                 char qdepth[AP_DEVICES];
1439
1440                 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1441                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1442                         return -EFAULT;
1443                 return 0;
1444         }
1445         case ZCRYPT_PERDEV_REQCNT: {
1446                 u32 *reqcnt;
1447
1448                 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1449                 if (!reqcnt)
1450                         return -ENOMEM;
1451                 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1452                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1453                         rc = -EFAULT;
1454                 kfree(reqcnt);
1455                 return rc;
1456         }
1457         case Z90STAT_REQUESTQ_COUNT:
1458                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1459         case Z90STAT_PENDINGQ_COUNT:
1460                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1461         case Z90STAT_TOTALOPEN_COUNT:
1462                 return put_user(atomic_read(&zcrypt_open_count),
1463                                 (int __user *) arg);
1464         case Z90STAT_DOMAIN_INDEX:
1465                 return put_user(ap_domain_index, (int __user *) arg);
1466         /*
1467          * Deprecated ioctls
1468          */
1469         case ZDEVICESTATUS: {
1470                 /* the old ioctl supports only 64 adapters */
1471                 struct zcrypt_device_status *device_status;
1472                 size_t total_size = MAX_ZDEV_ENTRIES
1473                         * sizeof(struct zcrypt_device_status);
1474
1475                 device_status = kzalloc(total_size, GFP_KERNEL);
1476                 if (!device_status)
1477                         return -ENOMEM;
1478                 zcrypt_device_status_mask(device_status);
1479                 if (copy_to_user((char __user *) arg, device_status,
1480                                  total_size))
1481                         rc = -EFAULT;
1482                 kfree(device_status);
1483                 return rc;
1484         }
1485         case Z90STAT_STATUS_MASK: {
1486                 /* the old ioctl supports only 64 adapters */
1487                 char status[MAX_ZDEV_CARDIDS];
1488
1489                 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1490                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1491                         return -EFAULT;
1492                 return 0;
1493         }
1494         case Z90STAT_QDEPTH_MASK: {
1495                 /* the old ioctl supports only 64 adapters */
1496                 char qdepth[MAX_ZDEV_CARDIDS];
1497
1498                 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1499                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1500                         return -EFAULT;
1501                 return 0;
1502         }
1503         case Z90STAT_PERDEV_REQCNT: {
1504                 /* the old ioctl supports only 64 adapters */
1505                 u32 reqcnt[MAX_ZDEV_CARDIDS];
1506
1507                 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1508                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1509                         return -EFAULT;
1510                 return 0;
1511         }
1512         /* unknown ioctl number */
1513         default:
1514                 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1515                 return -ENOIOCTLCMD;
1516         }
1517 }
1518
1519 #ifdef CONFIG_COMPAT
1520 /*
1521  * ioctl32 conversion routines
1522  */
1523 struct compat_ica_rsa_modexpo {
1524         compat_uptr_t   inputdata;
1525         unsigned int    inputdatalength;
1526         compat_uptr_t   outputdata;
1527         unsigned int    outputdatalength;
1528         compat_uptr_t   b_key;
1529         compat_uptr_t   n_modulus;
1530 };
1531
1532 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1533                             unsigned int cmd, unsigned long arg)
1534 {
1535         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1536         struct compat_ica_rsa_modexpo mex32;
1537         struct ica_rsa_modexpo mex64;
1538         long rc;
1539
1540         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1541                 return -EFAULT;
1542         mex64.inputdata = compat_ptr(mex32.inputdata);
1543         mex64.inputdatalength = mex32.inputdatalength;
1544         mex64.outputdata = compat_ptr(mex32.outputdata);
1545         mex64.outputdatalength = mex32.outputdatalength;
1546         mex64.b_key = compat_ptr(mex32.b_key);
1547         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1548         do {
1549                 rc = zcrypt_rsa_modexpo(perms, &mex64);
1550         } while (rc == -EAGAIN);
1551         /* on failure: retry once again after a requested rescan */
1552         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1553                 do {
1554                         rc = zcrypt_rsa_modexpo(perms, &mex64);
1555                 } while (rc == -EAGAIN);
1556         if (rc)
1557                 return rc;
1558         return put_user(mex64.outputdatalength,
1559                         &umex32->outputdatalength);
1560 }
1561
1562 struct compat_ica_rsa_modexpo_crt {
1563         compat_uptr_t   inputdata;
1564         unsigned int    inputdatalength;
1565         compat_uptr_t   outputdata;
1566         unsigned int    outputdatalength;
1567         compat_uptr_t   bp_key;
1568         compat_uptr_t   bq_key;
1569         compat_uptr_t   np_prime;
1570         compat_uptr_t   nq_prime;
1571         compat_uptr_t   u_mult_inv;
1572 };
1573
1574 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1575                                 unsigned int cmd, unsigned long arg)
1576 {
1577         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1578         struct compat_ica_rsa_modexpo_crt crt32;
1579         struct ica_rsa_modexpo_crt crt64;
1580         long rc;
1581
1582         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1583                 return -EFAULT;
1584         crt64.inputdata = compat_ptr(crt32.inputdata);
1585         crt64.inputdatalength = crt32.inputdatalength;
1586         crt64.outputdata = compat_ptr(crt32.outputdata);
1587         crt64.outputdatalength = crt32.outputdatalength;
1588         crt64.bp_key = compat_ptr(crt32.bp_key);
1589         crt64.bq_key = compat_ptr(crt32.bq_key);
1590         crt64.np_prime = compat_ptr(crt32.np_prime);
1591         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1592         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1593         do {
1594                 rc = zcrypt_rsa_crt(perms, &crt64);
1595         } while (rc == -EAGAIN);
1596         /* on failure: retry once again after a requested rescan */
1597         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1598                 do {
1599                         rc = zcrypt_rsa_crt(perms, &crt64);
1600                 } while (rc == -EAGAIN);
1601         if (rc)
1602                 return rc;
1603         return put_user(crt64.outputdatalength,
1604                         &ucrt32->outputdatalength);
1605 }
1606
1607 struct compat_ica_xcRB {
1608         unsigned short  agent_ID;
1609         unsigned int    user_defined;
1610         unsigned short  request_ID;
1611         unsigned int    request_control_blk_length;
1612         unsigned char   padding1[16 - sizeof(compat_uptr_t)];
1613         compat_uptr_t   request_control_blk_addr;
1614         unsigned int    request_data_length;
1615         char            padding2[16 - sizeof(compat_uptr_t)];
1616         compat_uptr_t   request_data_address;
1617         unsigned int    reply_control_blk_length;
1618         char            padding3[16 - sizeof(compat_uptr_t)];
1619         compat_uptr_t   reply_control_blk_addr;
1620         unsigned int    reply_data_length;
1621         char            padding4[16 - sizeof(compat_uptr_t)];
1622         compat_uptr_t   reply_data_addr;
1623         unsigned short  priority_window;
1624         unsigned int    status;
1625 } __packed;
1626
1627 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1628                          unsigned int cmd, unsigned long arg)
1629 {
1630         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1631         struct compat_ica_xcRB xcRB32;
1632         struct ica_xcRB xcRB64;
1633         long rc;
1634
1635         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1636                 return -EFAULT;
1637         xcRB64.agent_ID = xcRB32.agent_ID;
1638         xcRB64.user_defined = xcRB32.user_defined;
1639         xcRB64.request_ID = xcRB32.request_ID;
1640         xcRB64.request_control_blk_length =
1641                 xcRB32.request_control_blk_length;
1642         xcRB64.request_control_blk_addr =
1643                 compat_ptr(xcRB32.request_control_blk_addr);
1644         xcRB64.request_data_length =
1645                 xcRB32.request_data_length;
1646         xcRB64.request_data_address =
1647                 compat_ptr(xcRB32.request_data_address);
1648         xcRB64.reply_control_blk_length =
1649                 xcRB32.reply_control_blk_length;
1650         xcRB64.reply_control_blk_addr =
1651                 compat_ptr(xcRB32.reply_control_blk_addr);
1652         xcRB64.reply_data_length = xcRB32.reply_data_length;
1653         xcRB64.reply_data_addr =
1654                 compat_ptr(xcRB32.reply_data_addr);
1655         xcRB64.priority_window = xcRB32.priority_window;
1656         xcRB64.status = xcRB32.status;
1657         do {
1658                 rc = _zcrypt_send_cprb(perms, &xcRB64);
1659         } while (rc == -EAGAIN);
1660         /* on failure: retry once again after a requested rescan */
1661         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1662                 do {
1663                         rc = _zcrypt_send_cprb(perms, &xcRB64);
1664                 } while (rc == -EAGAIN);
1665         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1666         xcRB32.reply_data_length = xcRB64.reply_data_length;
1667         xcRB32.status = xcRB64.status;
1668         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1669                 return -EFAULT;
1670         return rc;
1671 }
1672
1673 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1674                          unsigned long arg)
1675 {
1676         int rc;
1677         struct ap_perms *perms =
1678                 (struct ap_perms *) filp->private_data;
1679
1680         rc = zcrypt_check_ioctl(perms, cmd);
1681         if (rc)
1682                 return rc;
1683
1684         if (cmd == ICARSAMODEXPO)
1685                 return trans_modexpo32(perms, filp, cmd, arg);
1686         if (cmd == ICARSACRT)
1687                 return trans_modexpo_crt32(perms, filp, cmd, arg);
1688         if (cmd == ZSECSENDCPRB)
1689                 return trans_xcRB32(perms, filp, cmd, arg);
1690         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1691 }
1692 #endif
1693
1694 /*
1695  * Misc device file operations.
1696  */
1697 static const struct file_operations zcrypt_fops = {
1698         .owner          = THIS_MODULE,
1699         .read           = zcrypt_read,
1700         .write          = zcrypt_write,
1701         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1702 #ifdef CONFIG_COMPAT
1703         .compat_ioctl   = zcrypt_compat_ioctl,
1704 #endif
1705         .open           = zcrypt_open,
1706         .release        = zcrypt_release,
1707         .llseek         = no_llseek,
1708 };
1709
1710 /*
1711  * Misc device.
1712  */
1713 static struct miscdevice zcrypt_misc_device = {
1714         .minor      = MISC_DYNAMIC_MINOR,
1715         .name       = "z90crypt",
1716         .fops       = &zcrypt_fops,
1717 };
1718
1719 static int zcrypt_rng_device_count;
1720 static u32 *zcrypt_rng_buffer;
1721 static int zcrypt_rng_buffer_index;
1722 static DEFINE_MUTEX(zcrypt_rng_mutex);
1723
1724 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1725 {
1726         int rc;
1727
1728         /*
1729          * We don't need locking here because the RNG API guarantees serialized
1730          * read method calls.
1731          */
1732         if (zcrypt_rng_buffer_index == 0) {
1733                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1734                 /* on failure: retry once again after a requested rescan */
1735                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1736                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1737                 if (rc < 0)
1738                         return -EIO;
1739                 zcrypt_rng_buffer_index = rc / sizeof(*data);
1740         }
1741         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1742         return sizeof(*data);
1743 }
1744
1745 static struct hwrng zcrypt_rng_dev = {
1746         .name           = "zcrypt",
1747         .data_read      = zcrypt_rng_data_read,
1748         .quality        = 990,
1749 };
1750
1751 int zcrypt_rng_device_add(void)
1752 {
1753         int rc = 0;
1754
1755         mutex_lock(&zcrypt_rng_mutex);
1756         if (zcrypt_rng_device_count == 0) {
1757                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1758                 if (!zcrypt_rng_buffer) {
1759                         rc = -ENOMEM;
1760                         goto out;
1761                 }
1762                 zcrypt_rng_buffer_index = 0;
1763                 if (!zcrypt_hwrng_seed)
1764                         zcrypt_rng_dev.quality = 0;
1765                 rc = hwrng_register(&zcrypt_rng_dev);
1766                 if (rc)
1767                         goto out_free;
1768                 zcrypt_rng_device_count = 1;
1769         } else
1770                 zcrypt_rng_device_count++;
1771         mutex_unlock(&zcrypt_rng_mutex);
1772         return 0;
1773
1774 out_free:
1775         free_page((unsigned long) zcrypt_rng_buffer);
1776 out:
1777         mutex_unlock(&zcrypt_rng_mutex);
1778         return rc;
1779 }
1780
1781 void zcrypt_rng_device_remove(void)
1782 {
1783         mutex_lock(&zcrypt_rng_mutex);
1784         zcrypt_rng_device_count--;
1785         if (zcrypt_rng_device_count == 0) {
1786                 hwrng_unregister(&zcrypt_rng_dev);
1787                 free_page((unsigned long) zcrypt_rng_buffer);
1788         }
1789         mutex_unlock(&zcrypt_rng_mutex);
1790 }
1791
1792 int __init zcrypt_debug_init(void)
1793 {
1794         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1795                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
1796         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1797         debug_set_level(zcrypt_dbf_info, DBF_ERR);
1798
1799         return 0;
1800 }
1801
1802 void zcrypt_debug_exit(void)
1803 {
1804         debug_unregister(zcrypt_dbf_info);
1805 }
1806
1807 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1808
1809 static int __init zcdn_init(void)
1810 {
1811         int rc;
1812
1813         /* create a new class 'zcrypt' */
1814         zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
1815         if (IS_ERR(zcrypt_class)) {
1816                 rc = PTR_ERR(zcrypt_class);
1817                 goto out_class_create_failed;
1818         }
1819         zcrypt_class->dev_release = zcdn_device_release;
1820
1821         /* alloc device minor range */
1822         rc = alloc_chrdev_region(&zcrypt_devt,
1823                                  0, ZCRYPT_MAX_MINOR_NODES,
1824                                  ZCRYPT_NAME);
1825         if (rc)
1826                 goto out_alloc_chrdev_failed;
1827
1828         cdev_init(&zcrypt_cdev, &zcrypt_fops);
1829         zcrypt_cdev.owner = THIS_MODULE;
1830         rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1831         if (rc)
1832                 goto out_cdev_add_failed;
1833
1834         /* need some class specific sysfs attributes */
1835         rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
1836         if (rc)
1837                 goto out_class_create_file_1_failed;
1838         rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
1839         if (rc)
1840                 goto out_class_create_file_2_failed;
1841
1842         return 0;
1843
1844 out_class_create_file_2_failed:
1845         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1846 out_class_create_file_1_failed:
1847         cdev_del(&zcrypt_cdev);
1848 out_cdev_add_failed:
1849         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1850 out_alloc_chrdev_failed:
1851         class_destroy(zcrypt_class);
1852 out_class_create_failed:
1853         return rc;
1854 }
1855
1856 static void zcdn_exit(void)
1857 {
1858         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1859         class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
1860         zcdn_destroy_all();
1861         cdev_del(&zcrypt_cdev);
1862         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1863         class_destroy(zcrypt_class);
1864 }
1865
1866 #endif
1867
1868 /**
1869  * zcrypt_api_init(): Module initialization.
1870  *
1871  * The module initialization code.
1872  */
1873 int __init zcrypt_api_init(void)
1874 {
1875         int rc;
1876
1877         rc = zcrypt_debug_init();
1878         if (rc)
1879                 goto out;
1880
1881 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1882         rc = zcdn_init();
1883         if (rc)
1884                 goto out;
1885 #endif
1886
1887         /* Register the request sprayer. */
1888         rc = misc_register(&zcrypt_misc_device);
1889         if (rc < 0)
1890                 goto out_misc_register_failed;
1891
1892         zcrypt_msgtype6_init();
1893         zcrypt_msgtype50_init();
1894
1895         return 0;
1896
1897 out_misc_register_failed:
1898 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1899         zcdn_exit();
1900 #endif
1901         zcrypt_debug_exit();
1902 out:
1903         return rc;
1904 }
1905
1906 /**
1907  * zcrypt_api_exit(): Module termination.
1908  *
1909  * The module termination code.
1910  */
1911 void __exit zcrypt_api_exit(void)
1912 {
1913 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1914         zcdn_exit();
1915 #endif
1916         misc_deregister(&zcrypt_misc_device);
1917         zcrypt_msgtype6_exit();
1918         zcrypt_msgtype50_exit();
1919         zcrypt_ccamisc_exit();
1920         zcrypt_ep11misc_exit();
1921         zcrypt_debug_exit();
1922 }
1923
1924 module_init(zcrypt_api_init);
1925 module_exit(zcrypt_api_exit);