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 true;
 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 true;
 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 zcrypt_track *tr,
 634                                struct ica_rsa_modexpo *mex)
 635 {
 636         struct zcrypt_card *zc, *pref_zc;
 637         struct zcrypt_queue *zq, *pref_zq;
 638         struct ap_message ap_msg;
 639         unsigned int wgt = 0, pref_wgt = 0;
 640         unsigned int func_code;
 641         int cpen, qpen, qid = 0, rc = -ENODEV;
 642         struct module *mod;
 643
 644         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
 645
 646         ap_init_message(&ap_msg);
 647
 648         if (mex->outputdatalength < mex->inputdatalength) {
 649                 func_code = 0;
 650                 rc = -EINVAL;
 651                 goto out;
 652         }
 653
 654         /*
 655          * As long as outputdatalength is big enough, we can set the
 656          * outputdatalength equal to the inputdatalength, since that is the
 657          * number of bytes we will copy in any case
 658          */
 659         mex->outputdatalength = mex->inputdatalength;
 660
 661         rc = get_rsa_modex_fc(mex, &func_code);
 662         if (rc)
 663                 goto out;
 664
 665         pref_zc = NULL;
 666         pref_zq = NULL;
 667         spin_lock(&zcrypt_list_lock);
 668         for_each_zcrypt_card(zc) {
 669                 /* Check for useable accelarator or CCA card */
 670                 if (!zc->online || !zc->card->config ||
 671                     !(zc->card->functions & 0x18000000))
 672                         continue;
 673                 /* Check for size limits */
 674                 if (zc->min_mod_size > mex->inputdatalength ||
 675                     zc->max_mod_size < mex->inputdatalength)
 676                         continue;
 677                 /* check if device node has admission for this card */
 678                 if (!zcrypt_check_card(perms, zc->card->id))
 679                         continue;
 680                 /* get weight index of the card device  */
 681                 wgt = zc->speed_rating[func_code];
 682                 /* penalty if this msg was previously sent via this card */
 683                 cpen = (tr && tr->again_counter && tr->last_qid &&
 684                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
 685                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
 686                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 687                         continue;
 688                 for_each_zcrypt_queue(zq, zc) {
 689                         /* check if device is useable and eligible */
 690                         if (!zq->online || !zq->ops->rsa_modexpo ||
 691                             !zq->queue->config)
 692                                 continue;
 693                         /* check if device node has admission for this queue */
 694                         if (!zcrypt_check_queue(perms,
 695                                                 AP_QID_QUEUE(zq->queue->qid)))
 696                                 continue;
 697                         /* penalty if the msg was previously sent at this qid */
 698                         qpen = (tr && tr->again_counter && tr->last_qid &&
 699                                 tr->last_qid == zq->queue->qid) ?
 700                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
 701                         if (!zcrypt_queue_compare(zq, pref_zq,
 702                                                   wgt + cpen + qpen, pref_wgt))
 703                                 continue;
 704                         pref_zc = zc;
 705                         pref_zq = zq;
 706                         pref_wgt = wgt + cpen + qpen;
 707                 }
 708         }
 709         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
 710         spin_unlock(&zcrypt_list_lock);
 711
 712         if (!pref_zq) {
 713                 rc = -ENODEV;
 714                 goto out;
 715         }
 716
 717         qid = pref_zq->queue->qid;
 718         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
 719
 720         spin_lock(&zcrypt_list_lock);
 721         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 722         spin_unlock(&zcrypt_list_lock);
 723
 724 out:
 725         ap_release_message(&ap_msg);
 726         if (tr) {
 727                 tr->last_rc = rc;
 728                 tr->last_qid = qid;
 729         }
 730         trace_s390_zcrypt_rep(mex, func_code, rc,
 731                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 732         return rc;
 733 }
 734
 735 static long zcrypt_rsa_crt(struct ap_perms *perms,
 736                            struct zcrypt_track *tr,
 737                            struct ica_rsa_modexpo_crt *crt)
 738 {
 739         struct zcrypt_card *zc, *pref_zc;
 740         struct zcrypt_queue *zq, *pref_zq;
 741         struct ap_message ap_msg;
 742         unsigned int wgt = 0, pref_wgt = 0;
 743         unsigned int func_code;
 744         int cpen, qpen, qid = 0, rc = -ENODEV;
 745         struct module *mod;
 746
 747         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
 748
 749         ap_init_message(&ap_msg);
 750
 751         if (crt->outputdatalength < crt->inputdatalength) {
 752                 func_code = 0;
 753                 rc = -EINVAL;
 754                 goto out;
 755         }
 756
 757         /*
 758          * As long as outputdatalength is big enough, we can set the
 759          * outputdatalength equal to the inputdatalength, since that is the
 760          * number of bytes we will copy in any case
 761          */
 762         crt->outputdatalength = crt->inputdatalength;
 763
 764         rc = get_rsa_crt_fc(crt, &func_code);
 765         if (rc)
 766                 goto out;
 767
 768         pref_zc = NULL;
 769         pref_zq = NULL;
 770         spin_lock(&zcrypt_list_lock);
 771         for_each_zcrypt_card(zc) {
 772                 /* Check for useable accelarator or CCA card */
 773                 if (!zc->online || !zc->card->config ||
 774                     !(zc->card->functions & 0x18000000))
 775                         continue;
 776                 /* Check for size limits */
 777                 if (zc->min_mod_size > crt->inputdatalength ||
 778                     zc->max_mod_size < crt->inputdatalength)
 779                         continue;
 780                 /* check if device node has admission for this card */
 781                 if (!zcrypt_check_card(perms, zc->card->id))
 782                         continue;
 783                 /* get weight index of the card device  */
 784                 wgt = zc->speed_rating[func_code];
 785                 /* penalty if this msg was previously sent via this card */
 786                 cpen = (tr && tr->again_counter && tr->last_qid &&
 787                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
 788                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
 789                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 790                         continue;
 791                 for_each_zcrypt_queue(zq, zc) {
 792                         /* check if device is useable and eligible */
 793                         if (!zq->online || !zq->ops->rsa_modexpo_crt ||
 794                             !zq->queue->config)
 795                                 continue;
 796                         /* check if device node has admission for this queue */
 797                         if (!zcrypt_check_queue(perms,
 798                                                 AP_QID_QUEUE(zq->queue->qid)))
 799                                 continue;
 800                         /* penalty if the msg was previously sent at this qid */
 801                         qpen = (tr && tr->again_counter && tr->last_qid &&
 802                                 tr->last_qid == zq->queue->qid) ?
 803                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
 804                         if (!zcrypt_queue_compare(zq, pref_zq,
 805                                                   wgt + cpen + qpen, pref_wgt))
 806                                 continue;
 807                         pref_zc = zc;
 808                         pref_zq = zq;
 809                         pref_wgt = wgt + cpen + qpen;
 810                 }
 811         }
 812         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
 813         spin_unlock(&zcrypt_list_lock);
 814
 815         if (!pref_zq) {
 816                 rc = -ENODEV;
 817                 goto out;
 818         }
 819
 820         qid = pref_zq->queue->qid;
 821         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
 822
 823         spin_lock(&zcrypt_list_lock);
 824         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 825         spin_unlock(&zcrypt_list_lock);
 826
 827 out:
 828         ap_release_message(&ap_msg);
 829         if (tr) {
 830                 tr->last_rc = rc;
 831                 tr->last_qid = qid;
 832         }
 833         trace_s390_zcrypt_rep(crt, func_code, rc,
 834                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 835         return rc;
 836 }
 837
 838 static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
 839                               struct zcrypt_track *tr,
 840                               struct ica_xcRB *xcRB)
 841 {
 842         struct zcrypt_card *zc, *pref_zc;
 843         struct zcrypt_queue *zq, *pref_zq;
 844         struct ap_message ap_msg;
 845         unsigned int wgt = 0, pref_wgt = 0;
 846         unsigned int func_code;
 847         unsigned short *domain, tdom;
 848         int cpen, qpen, qid = 0, rc = -ENODEV;
 849         struct module *mod;
 850
 851         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
 852
 853         xcRB->status = 0;
 854         ap_init_message(&ap_msg);
 855         rc = get_cprb_fc(userspace, xcRB, &ap_msg, &func_code, &domain);
 856         if (rc)
 857                 goto out;
 858
 859         /*
 860          * If a valid target domain is set and this domain is NOT a usage
 861          * domain but a control only domain, use the default domain as target.
 862          */
 863         tdom = *domain;
 864         if (tdom < AP_DOMAINS &&
 865             !ap_test_config_usage_domain(tdom) &&
 866             ap_test_config_ctrl_domain(tdom) &&
 867             ap_domain_index >= 0)
 868                 tdom = ap_domain_index;
 869
 870         pref_zc = NULL;
 871         pref_zq = NULL;
 872         spin_lock(&zcrypt_list_lock);
 873         for_each_zcrypt_card(zc) {
 874                 /* Check for useable CCA card */
 875                 if (!zc->online || !zc->card->config ||
 876                     !(zc->card->functions & 0x10000000))
 877                         continue;
 878                 /* Check for user selected CCA card */
 879                 if (xcRB->user_defined != AUTOSELECT &&
 880                     xcRB->user_defined != zc->card->id)
 881                         continue;
 882                 /* check if device node has admission for this card */
 883                 if (!zcrypt_check_card(perms, zc->card->id))
 884                         continue;
 885                 /* get weight index of the card device  */
 886                 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 887                 /* penalty if this msg was previously sent via this card */
 888                 cpen = (tr && tr->again_counter && tr->last_qid &&
 889                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
 890                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
 891                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 892                         continue;
 893                 for_each_zcrypt_queue(zq, zc) {
 894                         /* check for device useable and eligible */
 895                         if (!zq->online ||
 896                             !zq->ops->send_cprb ||
 897                             !zq->queue->config ||
 898                             (tdom != AUTOSEL_DOM &&
 899                              tdom != AP_QID_QUEUE(zq->queue->qid)))
 900                                 continue;
 901                         /* check if device node has admission for this queue */
 902                         if (!zcrypt_check_queue(perms,
 903                                                 AP_QID_QUEUE(zq->queue->qid)))
 904                                 continue;
 905                         /* penalty if the msg was previously sent at this qid */
 906                         qpen = (tr && tr->again_counter && tr->last_qid &&
 907                                 tr->last_qid == zq->queue->qid) ?
 908                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
 909                         if (!zcrypt_queue_compare(zq, pref_zq,
 910                                                   wgt + cpen + qpen, pref_wgt))
 911                                 continue;
 912                         pref_zc = zc;
 913                         pref_zq = zq;
 914                         pref_wgt = wgt + cpen + qpen;
 915                 }
 916         }
 917         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
 918         spin_unlock(&zcrypt_list_lock);
 919
 920         if (!pref_zq) {
 921                 rc = -ENODEV;
 922                 goto out;
 923         }
 924
 925         /* in case of auto select, provide the correct domain */
 926         qid = pref_zq->queue->qid;
 927         if (*domain == AUTOSEL_DOM)
 928                 *domain = AP_QID_QUEUE(qid);
 929
 930         rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcRB, &ap_msg);
 931
 932         spin_lock(&zcrypt_list_lock);
 933         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 934         spin_unlock(&zcrypt_list_lock);
 935
 936 out:
 937         ap_release_message(&ap_msg);
 938         if (tr) {
 939                 tr->last_rc = rc;
 940                 tr->last_qid = qid;
 941         }
 942         trace_s390_zcrypt_rep(xcRB, func_code, rc,
 943                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 944         return rc;
 945 }
 946
 947 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
 948 {
 949         return _zcrypt_send_cprb(false, &ap_perms, NULL, xcRB);
 950 }
 951 EXPORT_SYMBOL(zcrypt_send_cprb);
 952
 953 static bool is_desired_ep11_card(unsigned int dev_id,
 954                                  unsigned short target_num,
 955                                  struct ep11_target_dev *targets)
 956 {
 957         while (target_num-- > 0) {
 958                 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
 959                         return true;
 960                 targets++;
 961         }
 962         return false;
 963 }
 964
 965 static bool is_desired_ep11_queue(unsigned int dev_qid,
 966                                   unsigned short target_num,
 967                                   struct ep11_target_dev *targets)
 968 {
 969         int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
 970
 971         while (target_num-- > 0) {
 972                 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
 973                     (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
 974                         return true;
 975                 targets++;
 976         }
 977         return false;
 978 }
 979
 980 static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
 981                                    struct zcrypt_track *tr,
 982                                    struct ep11_urb *xcrb)
 983 {
 984         struct zcrypt_card *zc, *pref_zc;
 985         struct zcrypt_queue *zq, *pref_zq;
 986         struct ep11_target_dev *targets;
 987         unsigned short target_num;
 988         unsigned int wgt = 0, pref_wgt = 0;
 989         unsigned int func_code;
 990         struct ap_message ap_msg;
 991         int cpen, qpen, qid = 0, rc = -ENODEV;
 992         struct module *mod;
 993
 994         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
 995
 996         ap_init_message(&ap_msg);
 997
 998         target_num = (unsigned short) xcrb->targets_num;
 999
1000         /* empty list indicates autoselect (all available targets) */
1001         targets = NULL;
1002         if (target_num != 0) {
1003                 struct ep11_target_dev __user *uptr;
1004
1005                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
1006                 if (!targets) {
1007                         func_code = 0;
1008                         rc = -ENOMEM;
1009                         goto out;
1010                 }
1011
1012                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
1013                 if (z_copy_from_user(userspace, targets, uptr,
1014                                    target_num * sizeof(*targets))) {
1015                         func_code = 0;
1016                         rc = -EFAULT;
1017                         goto out_free;
1018                 }
1019         }
1020
1021         rc = get_ep11cprb_fc(userspace, xcrb, &ap_msg, &func_code);
1022         if (rc)
1023                 goto out_free;
1024
1025         pref_zc = NULL;
1026         pref_zq = NULL;
1027         spin_lock(&zcrypt_list_lock);
1028         for_each_zcrypt_card(zc) {
1029                 /* Check for useable EP11 card */
1030                 if (!zc->online || !zc->card->config ||
1031                     !(zc->card->functions & 0x04000000))
1032                         continue;
1033                 /* Check for user selected EP11 card */
1034                 if (targets &&
1035                     !is_desired_ep11_card(zc->card->id, target_num, targets))
1036                         continue;
1037                 /* check if device node has admission for this card */
1038                 if (!zcrypt_check_card(perms, zc->card->id))
1039                         continue;
1040                 /* get weight index of the card device  */
1041                 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1042                 /* penalty if this msg was previously sent via this card */
1043                 cpen = (tr && tr->again_counter && tr->last_qid &&
1044                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
1045                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
1046                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
1047                         continue;
1048                 for_each_zcrypt_queue(zq, zc) {
1049                         /* check if device is useable and eligible */
1050                         if (!zq->online ||
1051                             !zq->ops->send_ep11_cprb ||
1052                             !zq->queue->config ||
1053                             (targets &&
1054                              !is_desired_ep11_queue(zq->queue->qid,
1055                                                     target_num, targets)))
1056                                 continue;
1057                         /* check if device node has admission for this queue */
1058                         if (!zcrypt_check_queue(perms,
1059                                                 AP_QID_QUEUE(zq->queue->qid)))
1060                                 continue;
1061                         /* penalty if the msg was previously sent at this qid */
1062                         qpen = (tr && tr->again_counter && tr->last_qid &&
1063                                 tr->last_qid == zq->queue->qid) ?
1064                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
1065                         if (!zcrypt_queue_compare(zq, pref_zq,
1066                                                   wgt + cpen + qpen, pref_wgt))
1067                                 continue;
1068                         pref_zc = zc;
1069                         pref_zq = zq;
1070                         pref_wgt = wgt + cpen + qpen;
1071                 }
1072         }
1073         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1074         spin_unlock(&zcrypt_list_lock);
1075
1076         if (!pref_zq) {
1077                 rc = -ENODEV;
1078                 goto out_free;
1079         }
1080
1081         qid = pref_zq->queue->qid;
1082         rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
1083
1084         spin_lock(&zcrypt_list_lock);
1085         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1086         spin_unlock(&zcrypt_list_lock);
1087
1088 out_free:
1089         kfree(targets);
1090 out:
1091         ap_release_message(&ap_msg);
1092         if (tr) {
1093                 tr->last_rc = rc;
1094                 tr->last_qid = qid;
1095         }
1096         trace_s390_zcrypt_rep(xcrb, func_code, rc,
1097                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1098         return rc;
1099 }
1100
1101 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1102 {
1103         return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb);
1104 }
1105 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1106
1107 static long zcrypt_rng(char *buffer)
1108 {
1109         struct zcrypt_card *zc, *pref_zc;
1110         struct zcrypt_queue *zq, *pref_zq;
1111         unsigned int wgt = 0, pref_wgt = 0;
1112         unsigned int func_code;
1113         struct ap_message ap_msg;
1114         unsigned int domain;
1115         int qid = 0, rc = -ENODEV;
1116         struct module *mod;
1117
1118         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1119
1120         ap_init_message(&ap_msg);
1121         rc = get_rng_fc(&ap_msg, &func_code, &domain);
1122         if (rc)
1123                 goto out;
1124
1125         pref_zc = NULL;
1126         pref_zq = NULL;
1127         spin_lock(&zcrypt_list_lock);
1128         for_each_zcrypt_card(zc) {
1129                 /* Check for useable CCA card */
1130                 if (!zc->online || !zc->card->config ||
1131                     !(zc->card->functions & 0x10000000))
1132                         continue;
1133                 /* get weight index of the card device  */
1134                 wgt = zc->speed_rating[func_code];
1135                 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
1136                         continue;
1137                 for_each_zcrypt_queue(zq, zc) {
1138                         /* check if device is useable and eligible */
1139                         if (!zq->online || !zq->ops->rng ||
1140                             !zq->queue->config)
1141                                 continue;
1142                         if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
1143                                 continue;
1144                         pref_zc = zc;
1145                         pref_zq = zq;
1146                         pref_wgt = wgt;
1147                 }
1148         }
1149         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1150         spin_unlock(&zcrypt_list_lock);
1151
1152         if (!pref_zq) {
1153                 rc = -ENODEV;
1154                 goto out;
1155         }
1156
1157         qid = pref_zq->queue->qid;
1158         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1159
1160         spin_lock(&zcrypt_list_lock);
1161         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1162         spin_unlock(&zcrypt_list_lock);
1163
1164 out:
1165         ap_release_message(&ap_msg);
1166         trace_s390_zcrypt_rep(buffer, func_code, rc,
1167                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1168         return rc;
1169 }
1170
1171 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1172 {
1173         struct zcrypt_card *zc;
1174         struct zcrypt_queue *zq;
1175         struct zcrypt_device_status *stat;
1176         int card, queue;
1177
1178         memset(devstatus, 0, MAX_ZDEV_ENTRIES
1179                * sizeof(struct zcrypt_device_status));
1180
1181         spin_lock(&zcrypt_list_lock);
1182         for_each_zcrypt_card(zc) {
1183                 for_each_zcrypt_queue(zq, zc) {
1184                         card = AP_QID_CARD(zq->queue->qid);
1185                         if (card >= MAX_ZDEV_CARDIDS)
1186                                 continue;
1187                         queue = AP_QID_QUEUE(zq->queue->qid);
1188                         stat = &devstatus[card * AP_DOMAINS + queue];
1189                         stat->hwtype = zc->card->ap_dev.device_type;
1190                         stat->functions = zc->card->functions >> 26;
1191                         stat->qid = zq->queue->qid;
1192                         stat->online = zq->online ? 0x01 : 0x00;
1193                 }
1194         }
1195         spin_unlock(&zcrypt_list_lock);
1196 }
1197
1198 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1199 {
1200         struct zcrypt_card *zc;
1201         struct zcrypt_queue *zq;
1202         struct zcrypt_device_status_ext *stat;
1203         int card, queue;
1204
1205         memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1206                * sizeof(struct zcrypt_device_status_ext));
1207
1208         spin_lock(&zcrypt_list_lock);
1209         for_each_zcrypt_card(zc) {
1210                 for_each_zcrypt_queue(zq, zc) {
1211                         card = AP_QID_CARD(zq->queue->qid);
1212                         queue = AP_QID_QUEUE(zq->queue->qid);
1213                         stat = &devstatus[card * AP_DOMAINS + queue];
1214                         stat->hwtype = zc->card->ap_dev.device_type;
1215                         stat->functions = zc->card->functions >> 26;
1216                         stat->qid = zq->queue->qid;
1217                         stat->online = zq->online ? 0x01 : 0x00;
1218                 }
1219         }
1220         spin_unlock(&zcrypt_list_lock);
1221 }
1222 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1223
1224 int zcrypt_device_status_ext(int card, int queue,
1225                              struct zcrypt_device_status_ext *devstat)
1226 {
1227         struct zcrypt_card *zc;
1228         struct zcrypt_queue *zq;
1229
1230         memset(devstat, 0, sizeof(*devstat));
1231
1232         spin_lock(&zcrypt_list_lock);
1233         for_each_zcrypt_card(zc) {
1234                 for_each_zcrypt_queue(zq, zc) {
1235                         if (card == AP_QID_CARD(zq->queue->qid) &&
1236                             queue == AP_QID_QUEUE(zq->queue->qid)) {
1237                                 devstat->hwtype = zc->card->ap_dev.device_type;
1238                                 devstat->functions = zc->card->functions >> 26;
1239                                 devstat->qid = zq->queue->qid;
1240                                 devstat->online = zq->online ? 0x01 : 0x00;
1241                                 spin_unlock(&zcrypt_list_lock);
1242                                 return 0;
1243                         }
1244                 }
1245         }
1246         spin_unlock(&zcrypt_list_lock);
1247
1248         return -ENODEV;
1249 }
1250 EXPORT_SYMBOL(zcrypt_device_status_ext);
1251
1252 static void zcrypt_status_mask(char status[], size_t max_adapters)
1253 {
1254         struct zcrypt_card *zc;
1255         struct zcrypt_queue *zq;
1256         int card;
1257
1258         memset(status, 0, max_adapters);
1259         spin_lock(&zcrypt_list_lock);
1260         for_each_zcrypt_card(zc) {
1261                 for_each_zcrypt_queue(zq, zc) {
1262                         card = AP_QID_CARD(zq->queue->qid);
1263                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1264                             || card >= max_adapters)
1265                                 continue;
1266                         status[card] = zc->online ? zc->user_space_type : 0x0d;
1267                 }
1268         }
1269         spin_unlock(&zcrypt_list_lock);
1270 }
1271
1272 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1273 {
1274         struct zcrypt_card *zc;
1275         struct zcrypt_queue *zq;
1276         int card;
1277
1278         memset(qdepth, 0, max_adapters);
1279         spin_lock(&zcrypt_list_lock);
1280         local_bh_disable();
1281         for_each_zcrypt_card(zc) {
1282                 for_each_zcrypt_queue(zq, zc) {
1283                         card = AP_QID_CARD(zq->queue->qid);
1284                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1285                             || card >= max_adapters)
1286                                 continue;
1287                         spin_lock(&zq->queue->lock);
1288                         qdepth[card] =
1289                                 zq->queue->pendingq_count +
1290                                 zq->queue->requestq_count;
1291                         spin_unlock(&zq->queue->lock);
1292                 }
1293         }
1294         local_bh_enable();
1295         spin_unlock(&zcrypt_list_lock);
1296 }
1297
1298 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1299 {
1300         struct zcrypt_card *zc;
1301         struct zcrypt_queue *zq;
1302         int card;
1303         u64 cnt;
1304
1305         memset(reqcnt, 0, sizeof(int) * max_adapters);
1306         spin_lock(&zcrypt_list_lock);
1307         local_bh_disable();
1308         for_each_zcrypt_card(zc) {
1309                 for_each_zcrypt_queue(zq, zc) {
1310                         card = AP_QID_CARD(zq->queue->qid);
1311                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1312                             || card >= max_adapters)
1313                                 continue;
1314                         spin_lock(&zq->queue->lock);
1315                         cnt = zq->queue->total_request_count;
1316                         spin_unlock(&zq->queue->lock);
1317                         reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX;
1318                 }
1319         }
1320         local_bh_enable();
1321         spin_unlock(&zcrypt_list_lock);
1322 }
1323
1324 static int zcrypt_pendingq_count(void)
1325 {
1326         struct zcrypt_card *zc;
1327         struct zcrypt_queue *zq;
1328         int pendingq_count;
1329
1330         pendingq_count = 0;
1331         spin_lock(&zcrypt_list_lock);
1332         local_bh_disable();
1333         for_each_zcrypt_card(zc) {
1334                 for_each_zcrypt_queue(zq, zc) {
1335                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1336                                 continue;
1337                         spin_lock(&zq->queue->lock);
1338                         pendingq_count += zq->queue->pendingq_count;
1339                         spin_unlock(&zq->queue->lock);
1340                 }
1341         }
1342         local_bh_enable();
1343         spin_unlock(&zcrypt_list_lock);
1344         return pendingq_count;
1345 }
1346
1347 static int zcrypt_requestq_count(void)
1348 {
1349         struct zcrypt_card *zc;
1350         struct zcrypt_queue *zq;
1351         int requestq_count;
1352
1353         requestq_count = 0;
1354         spin_lock(&zcrypt_list_lock);
1355         local_bh_disable();
1356         for_each_zcrypt_card(zc) {
1357                 for_each_zcrypt_queue(zq, zc) {
1358                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1359                                 continue;
1360                         spin_lock(&zq->queue->lock);
1361                         requestq_count += zq->queue->requestq_count;
1362                         spin_unlock(&zq->queue->lock);
1363                 }
1364         }
1365         local_bh_enable();
1366         spin_unlock(&zcrypt_list_lock);
1367         return requestq_count;
1368 }
1369
1370 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1371 {
1372         int rc;
1373         struct zcrypt_track tr;
1374         struct ica_rsa_modexpo mex;
1375         struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1376
1377         memset(&tr, 0, sizeof(tr));
1378         if (copy_from_user(&mex, umex, sizeof(mex)))
1379                 return -EFAULT;
1380         do {
1381                 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1382                 if (rc == -EAGAIN)
1383                         tr.again_counter++;
1384         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1385         /* on failure: retry once again after a requested rescan */
1386         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1387                 do {
1388                         rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1389                         if (rc == -EAGAIN)
1390                                 tr.again_counter++;
1391                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1392         if (rc) {
1393                 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1394                 return rc;
1395         }
1396         return put_user(mex.outputdatalength, &umex->outputdatalength);
1397 }
1398
1399 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1400 {
1401         int rc;
1402         struct zcrypt_track tr;
1403         struct ica_rsa_modexpo_crt crt;
1404         struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1405
1406         memset(&tr, 0, sizeof(tr));
1407         if (copy_from_user(&crt, ucrt, sizeof(crt)))
1408                 return -EFAULT;
1409         do {
1410                 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1411                 if (rc == -EAGAIN)
1412                         tr.again_counter++;
1413         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1414         /* on failure: retry once again after a requested rescan */
1415         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1416                 do {
1417                         rc = zcrypt_rsa_crt(perms, &tr, &crt);
1418                         if (rc == -EAGAIN)
1419                                 tr.again_counter++;
1420                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1421         if (rc) {
1422                 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1423                 return rc;
1424         }
1425         return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1426 }
1427
1428 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1429 {
1430         int rc;
1431         struct ica_xcRB xcRB;
1432         struct zcrypt_track tr;
1433         struct ica_xcRB __user *uxcRB = (void __user *) arg;
1434
1435         memset(&tr, 0, sizeof(tr));
1436         if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1437                 return -EFAULT;
1438         do {
1439                 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
1440                 if (rc == -EAGAIN)
1441                         tr.again_counter++;
1442         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1443         /* on failure: retry once again after a requested rescan */
1444         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1445                 do {
1446                         rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
1447                         if (rc == -EAGAIN)
1448                                 tr.again_counter++;
1449                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1450         if (rc)
1451                 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1452                            rc, xcRB.status);
1453         if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1454                 return -EFAULT;
1455         return rc;
1456 }
1457
1458 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1459 {
1460         int rc;
1461         struct ep11_urb xcrb;
1462         struct zcrypt_track tr;
1463         struct ep11_urb __user *uxcrb = (void __user *)arg;
1464
1465         memset(&tr, 0, sizeof(tr));
1466         if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1467                 return -EFAULT;
1468         do {
1469                 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1470                 if (rc == -EAGAIN)
1471                         tr.again_counter++;
1472         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1473         /* on failure: retry once again after a requested rescan */
1474         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1475                 do {
1476                         rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1477                         if (rc == -EAGAIN)
1478                                 tr.again_counter++;
1479                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1480         if (rc)
1481                 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1482         if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1483                 return -EFAULT;
1484         return rc;
1485 }
1486
1487 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1488                                   unsigned long arg)
1489 {
1490         int rc;
1491         struct ap_perms *perms =
1492                 (struct ap_perms *) filp->private_data;
1493
1494         rc = zcrypt_check_ioctl(perms, cmd);
1495         if (rc)
1496                 return rc;
1497
1498         switch (cmd) {
1499         case ICARSAMODEXPO:
1500                 return icarsamodexpo_ioctl(perms, arg);
1501         case ICARSACRT:
1502                 return icarsacrt_ioctl(perms, arg);
1503         case ZSECSENDCPRB:
1504                 return zsecsendcprb_ioctl(perms, arg);
1505         case ZSENDEP11CPRB:
1506                 return zsendep11cprb_ioctl(perms, arg);
1507         case ZCRYPT_DEVICE_STATUS: {
1508                 struct zcrypt_device_status_ext *device_status;
1509                 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1510                         * sizeof(struct zcrypt_device_status_ext);
1511
1512                 device_status = kzalloc(total_size, GFP_KERNEL);
1513                 if (!device_status)
1514                         return -ENOMEM;
1515                 zcrypt_device_status_mask_ext(device_status);
1516                 if (copy_to_user((char __user *) arg, device_status,
1517                                  total_size))
1518                         rc = -EFAULT;
1519                 kfree(device_status);
1520                 return rc;
1521         }
1522         case ZCRYPT_STATUS_MASK: {
1523                 char status[AP_DEVICES];
1524
1525                 zcrypt_status_mask(status, AP_DEVICES);
1526                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1527                         return -EFAULT;
1528                 return 0;
1529         }
1530         case ZCRYPT_QDEPTH_MASK: {
1531                 char qdepth[AP_DEVICES];
1532
1533                 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1534                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1535                         return -EFAULT;
1536                 return 0;
1537         }
1538         case ZCRYPT_PERDEV_REQCNT: {
1539                 u32 *reqcnt;
1540
1541                 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1542                 if (!reqcnt)
1543                         return -ENOMEM;
1544                 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1545                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1546                         rc = -EFAULT;
1547                 kfree(reqcnt);
1548                 return rc;
1549         }
1550         case Z90STAT_REQUESTQ_COUNT:
1551                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1552         case Z90STAT_PENDINGQ_COUNT:
1553                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1554         case Z90STAT_TOTALOPEN_COUNT:
1555                 return put_user(atomic_read(&zcrypt_open_count),
1556                                 (int __user *) arg);
1557         case Z90STAT_DOMAIN_INDEX:
1558                 return put_user(ap_domain_index, (int __user *) arg);
1559         /*
1560          * Deprecated ioctls
1561          */
1562         case ZDEVICESTATUS: {
1563                 /* the old ioctl supports only 64 adapters */
1564                 struct zcrypt_device_status *device_status;
1565                 size_t total_size = MAX_ZDEV_ENTRIES
1566                         * sizeof(struct zcrypt_device_status);
1567
1568                 device_status = kzalloc(total_size, GFP_KERNEL);
1569                 if (!device_status)
1570                         return -ENOMEM;
1571                 zcrypt_device_status_mask(device_status);
1572                 if (copy_to_user((char __user *) arg, device_status,
1573                                  total_size))
1574                         rc = -EFAULT;
1575                 kfree(device_status);
1576                 return rc;
1577         }
1578         case Z90STAT_STATUS_MASK: {
1579                 /* the old ioctl supports only 64 adapters */
1580                 char status[MAX_ZDEV_CARDIDS];
1581
1582                 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1583                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1584                         return -EFAULT;
1585                 return 0;
1586         }
1587         case Z90STAT_QDEPTH_MASK: {
1588                 /* the old ioctl supports only 64 adapters */
1589                 char qdepth[MAX_ZDEV_CARDIDS];
1590
1591                 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1592                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1593                         return -EFAULT;
1594                 return 0;
1595         }
1596         case Z90STAT_PERDEV_REQCNT: {
1597                 /* the old ioctl supports only 64 adapters */
1598                 u32 reqcnt[MAX_ZDEV_CARDIDS];
1599
1600                 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1601                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1602                         return -EFAULT;
1603                 return 0;
1604         }
1605         /* unknown ioctl number */
1606         default:
1607                 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1608                 return -ENOIOCTLCMD;
1609         }
1610 }
1611
1612 #ifdef CONFIG_COMPAT
1613 /*
1614  * ioctl32 conversion routines
1615  */
1616 struct compat_ica_rsa_modexpo {
1617         compat_uptr_t   inputdata;
1618         unsigned int    inputdatalength;
1619         compat_uptr_t   outputdata;
1620         unsigned int    outputdatalength;
1621         compat_uptr_t   b_key;
1622         compat_uptr_t   n_modulus;
1623 };
1624
1625 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1626                             unsigned int cmd, unsigned long arg)
1627 {
1628         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1629         struct compat_ica_rsa_modexpo mex32;
1630         struct ica_rsa_modexpo mex64;
1631         struct zcrypt_track tr;
1632         long rc;
1633
1634         memset(&tr, 0, sizeof(tr));
1635         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1636                 return -EFAULT;
1637         mex64.inputdata = compat_ptr(mex32.inputdata);
1638         mex64.inputdatalength = mex32.inputdatalength;
1639         mex64.outputdata = compat_ptr(mex32.outputdata);
1640         mex64.outputdatalength = mex32.outputdatalength;
1641         mex64.b_key = compat_ptr(mex32.b_key);
1642         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1643         do {
1644                 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1645                 if (rc == -EAGAIN)
1646                         tr.again_counter++;
1647         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1648         /* on failure: retry once again after a requested rescan */
1649         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1650                 do {
1651                         rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1652                         if (rc == -EAGAIN)
1653                                 tr.again_counter++;
1654                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1655         if (rc)
1656                 return rc;
1657         return put_user(mex64.outputdatalength,
1658                         &umex32->outputdatalength);
1659 }
1660
1661 struct compat_ica_rsa_modexpo_crt {
1662         compat_uptr_t   inputdata;
1663         unsigned int    inputdatalength;
1664         compat_uptr_t   outputdata;
1665         unsigned int    outputdatalength;
1666         compat_uptr_t   bp_key;
1667         compat_uptr_t   bq_key;
1668         compat_uptr_t   np_prime;
1669         compat_uptr_t   nq_prime;
1670         compat_uptr_t   u_mult_inv;
1671 };
1672
1673 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1674                                 unsigned int cmd, unsigned long arg)
1675 {
1676         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1677         struct compat_ica_rsa_modexpo_crt crt32;
1678         struct ica_rsa_modexpo_crt crt64;
1679         struct zcrypt_track tr;
1680         long rc;
1681
1682         memset(&tr, 0, sizeof(tr));
1683         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1684                 return -EFAULT;
1685         crt64.inputdata = compat_ptr(crt32.inputdata);
1686         crt64.inputdatalength = crt32.inputdatalength;
1687         crt64.outputdata = compat_ptr(crt32.outputdata);
1688         crt64.outputdatalength = crt32.outputdatalength;
1689         crt64.bp_key = compat_ptr(crt32.bp_key);
1690         crt64.bq_key = compat_ptr(crt32.bq_key);
1691         crt64.np_prime = compat_ptr(crt32.np_prime);
1692         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1693         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1694         do {
1695                 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1696                 if (rc == -EAGAIN)
1697                         tr.again_counter++;
1698         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1699         /* on failure: retry once again after a requested rescan */
1700         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1701                 do {
1702                         rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1703                         if (rc == -EAGAIN)
1704                                 tr.again_counter++;
1705                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1706         if (rc)
1707                 return rc;
1708         return put_user(crt64.outputdatalength,
1709                         &ucrt32->outputdatalength);
1710 }
1711
1712 struct compat_ica_xcRB {
1713         unsigned short  agent_ID;
1714         unsigned int    user_defined;
1715         unsigned short  request_ID;
1716         unsigned int    request_control_blk_length;
1717         unsigned char   padding1[16 - sizeof(compat_uptr_t)];
1718         compat_uptr_t   request_control_blk_addr;
1719         unsigned int    request_data_length;
1720         char            padding2[16 - sizeof(compat_uptr_t)];
1721         compat_uptr_t   request_data_address;
1722         unsigned int    reply_control_blk_length;
1723         char            padding3[16 - sizeof(compat_uptr_t)];
1724         compat_uptr_t   reply_control_blk_addr;
1725         unsigned int    reply_data_length;
1726         char            padding4[16 - sizeof(compat_uptr_t)];
1727         compat_uptr_t   reply_data_addr;
1728         unsigned short  priority_window;
1729         unsigned int    status;
1730 } __packed;
1731
1732 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1733                          unsigned int cmd, unsigned long arg)
1734 {
1735         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1736         struct compat_ica_xcRB xcRB32;
1737         struct zcrypt_track tr;
1738         struct ica_xcRB xcRB64;
1739         long rc;
1740
1741         memset(&tr, 0, sizeof(tr));
1742         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1743                 return -EFAULT;
1744         xcRB64.agent_ID = xcRB32.agent_ID;
1745         xcRB64.user_defined = xcRB32.user_defined;
1746         xcRB64.request_ID = xcRB32.request_ID;
1747         xcRB64.request_control_blk_length =
1748                 xcRB32.request_control_blk_length;
1749         xcRB64.request_control_blk_addr =
1750                 compat_ptr(xcRB32.request_control_blk_addr);
1751         xcRB64.request_data_length =
1752                 xcRB32.request_data_length;
1753         xcRB64.request_data_address =
1754                 compat_ptr(xcRB32.request_data_address);
1755         xcRB64.reply_control_blk_length =
1756                 xcRB32.reply_control_blk_length;
1757         xcRB64.reply_control_blk_addr =
1758                 compat_ptr(xcRB32.reply_control_blk_addr);
1759         xcRB64.reply_data_length = xcRB32.reply_data_length;
1760         xcRB64.reply_data_addr =
1761                 compat_ptr(xcRB32.reply_data_addr);
1762         xcRB64.priority_window = xcRB32.priority_window;
1763         xcRB64.status = xcRB32.status;
1764         do {
1765                 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
1766                 if (rc == -EAGAIN)
1767                         tr.again_counter++;
1768         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1769         /* on failure: retry once again after a requested rescan */
1770         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1771                 do {
1772                         rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
1773                         if (rc == -EAGAIN)
1774                                 tr.again_counter++;
1775                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1776         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1777         xcRB32.reply_data_length = xcRB64.reply_data_length;
1778         xcRB32.status = xcRB64.status;
1779         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1780                 return -EFAULT;
1781         return rc;
1782 }
1783
1784 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1785                          unsigned long arg)
1786 {
1787         int rc;
1788         struct ap_perms *perms =
1789                 (struct ap_perms *) filp->private_data;
1790
1791         rc = zcrypt_check_ioctl(perms, cmd);
1792         if (rc)
1793                 return rc;
1794
1795         if (cmd == ICARSAMODEXPO)
1796                 return trans_modexpo32(perms, filp, cmd, arg);
1797         if (cmd == ICARSACRT)
1798                 return trans_modexpo_crt32(perms, filp, cmd, arg);
1799         if (cmd == ZSECSENDCPRB)
1800                 return trans_xcRB32(perms, filp, cmd, arg);
1801         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1802 }
1803 #endif
1804
1805 /*
1806  * Misc device file operations.
1807  */
1808 static const struct file_operations zcrypt_fops = {
1809         .owner          = THIS_MODULE,
1810         .read           = zcrypt_read,
1811         .write          = zcrypt_write,
1812         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1813 #ifdef CONFIG_COMPAT
1814         .compat_ioctl   = zcrypt_compat_ioctl,
1815 #endif
1816         .open           = zcrypt_open,
1817         .release        = zcrypt_release,
1818         .llseek         = no_llseek,
1819 };
1820
1821 /*
1822  * Misc device.
1823  */
1824 static struct miscdevice zcrypt_misc_device = {
1825         .minor      = MISC_DYNAMIC_MINOR,
1826         .name       = "z90crypt",
1827         .fops       = &zcrypt_fops,
1828 };
1829
1830 static int zcrypt_rng_device_count;
1831 static u32 *zcrypt_rng_buffer;
1832 static int zcrypt_rng_buffer_index;
1833 static DEFINE_MUTEX(zcrypt_rng_mutex);
1834
1835 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1836 {
1837         int rc;
1838
1839         /*
1840          * We don't need locking here because the RNG API guarantees serialized
1841          * read method calls.
1842          */
1843         if (zcrypt_rng_buffer_index == 0) {
1844                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1845                 /* on failure: retry once again after a requested rescan */
1846                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1847                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1848                 if (rc < 0)
1849                         return -EIO;
1850                 zcrypt_rng_buffer_index = rc / sizeof(*data);
1851         }
1852         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1853         return sizeof(*data);
1854 }
1855
1856 static struct hwrng zcrypt_rng_dev = {
1857         .name           = "zcrypt",
1858         .data_read      = zcrypt_rng_data_read,
1859         .quality        = 990,
1860 };
1861
1862 int zcrypt_rng_device_add(void)
1863 {
1864         int rc = 0;
1865
1866         mutex_lock(&zcrypt_rng_mutex);
1867         if (zcrypt_rng_device_count == 0) {
1868                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1869                 if (!zcrypt_rng_buffer) {
1870                         rc = -ENOMEM;
1871                         goto out;
1872                 }
1873                 zcrypt_rng_buffer_index = 0;
1874                 if (!zcrypt_hwrng_seed)
1875                         zcrypt_rng_dev.quality = 0;
1876                 rc = hwrng_register(&zcrypt_rng_dev);
1877                 if (rc)
1878                         goto out_free;
1879                 zcrypt_rng_device_count = 1;
1880         } else
1881                 zcrypt_rng_device_count++;
1882         mutex_unlock(&zcrypt_rng_mutex);
1883         return 0;
1884
1885 out_free:
1886         free_page((unsigned long) zcrypt_rng_buffer);
1887 out:
1888         mutex_unlock(&zcrypt_rng_mutex);
1889         return rc;
1890 }
1891
1892 void zcrypt_rng_device_remove(void)
1893 {
1894         mutex_lock(&zcrypt_rng_mutex);
1895         zcrypt_rng_device_count--;
1896         if (zcrypt_rng_device_count == 0) {
1897                 hwrng_unregister(&zcrypt_rng_dev);
1898                 free_page((unsigned long) zcrypt_rng_buffer);
1899         }
1900         mutex_unlock(&zcrypt_rng_mutex);
1901 }
1902
1903 int __init zcrypt_debug_init(void)
1904 {
1905         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1906                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
1907         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1908         debug_set_level(zcrypt_dbf_info, DBF_ERR);
1909
1910         return 0;
1911 }
1912
1913 void zcrypt_debug_exit(void)
1914 {
1915         debug_unregister(zcrypt_dbf_info);
1916 }
1917
1918 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1919
1920 static int __init zcdn_init(void)
1921 {
1922         int rc;
1923
1924         /* create a new class 'zcrypt' */
1925         zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
1926         if (IS_ERR(zcrypt_class)) {
1927                 rc = PTR_ERR(zcrypt_class);
1928                 goto out_class_create_failed;
1929         }
1930         zcrypt_class->dev_release = zcdn_device_release;
1931
1932         /* alloc device minor range */
1933         rc = alloc_chrdev_region(&zcrypt_devt,
1934                                  0, ZCRYPT_MAX_MINOR_NODES,
1935                                  ZCRYPT_NAME);
1936         if (rc)
1937                 goto out_alloc_chrdev_failed;
1938
1939         cdev_init(&zcrypt_cdev, &zcrypt_fops);
1940         zcrypt_cdev.owner = THIS_MODULE;
1941         rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1942         if (rc)
1943                 goto out_cdev_add_failed;
1944
1945         /* need some class specific sysfs attributes */
1946         rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
1947         if (rc)
1948                 goto out_class_create_file_1_failed;
1949         rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
1950         if (rc)
1951                 goto out_class_create_file_2_failed;
1952
1953         return 0;
1954
1955 out_class_create_file_2_failed:
1956         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1957 out_class_create_file_1_failed:
1958         cdev_del(&zcrypt_cdev);
1959 out_cdev_add_failed:
1960         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1961 out_alloc_chrdev_failed:
1962         class_destroy(zcrypt_class);
1963 out_class_create_failed:
1964         return rc;
1965 }
1966
1967 static void zcdn_exit(void)
1968 {
1969         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1970         class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
1971         zcdn_destroy_all();
1972         cdev_del(&zcrypt_cdev);
1973         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1974         class_destroy(zcrypt_class);
1975 }
1976
1977 #endif
1978
1979 /**
1980  * zcrypt_api_init(): Module initialization.
1981  *
1982  * The module initialization code.
1983  */
1984 int __init zcrypt_api_init(void)
1985 {
1986         int rc;
1987
1988         rc = zcrypt_debug_init();
1989         if (rc)
1990                 goto out;
1991
1992 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1993         rc = zcdn_init();
1994         if (rc)
1995                 goto out;
1996 #endif
1997
1998         /* Register the request sprayer. */
1999         rc = misc_register(&zcrypt_misc_device);
2000         if (rc < 0)
2001                 goto out_misc_register_failed;
2002
2003         zcrypt_msgtype6_init();
2004         zcrypt_msgtype50_init();
2005
2006         return 0;
2007
2008 out_misc_register_failed:
2009 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2010         zcdn_exit();
2011 #endif
2012         zcrypt_debug_exit();
2013 out:
2014         return rc;
2015 }
2016
2017 /**
2018  * zcrypt_api_exit(): Module termination.
2019  *
2020  * The module termination code.
2021  */
2022 void __exit zcrypt_api_exit(void)
2023 {
2024 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2025         zcdn_exit();
2026 #endif
2027         misc_deregister(&zcrypt_misc_device);
2028         zcrypt_msgtype6_exit();
2029         zcrypt_msgtype50_exit();
2030         zcrypt_ccamisc_exit();
2031         zcrypt_ep11misc_exit();
2032         zcrypt_debug_exit();
2033 }
2034
2035 module_init(zcrypt_api_init);
2036 module_exit(zcrypt_api_exit);