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 <linux/capability.h>
  29 #include <asm/debug.h>
  30
  31 #define CREATE_TRACE_POINTS
  32 #include <asm/trace/zcrypt.h>
  33
  34 #include "zcrypt_api.h"
  35 #include "zcrypt_debug.h"
  36
  37 #include "zcrypt_msgtype6.h"
  38 #include "zcrypt_msgtype50.h"
  39 #include "zcrypt_ccamisc.h"
  40 #include "zcrypt_ep11misc.h"
  41
  42 /*
  43  * Module description.
  44  */
  45 MODULE_AUTHOR("IBM Corporation");
  46 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
  47                    "Copyright IBM Corp. 2001, 2012");
  48 MODULE_LICENSE("GPL");
  49
  50 /*
  51  * zcrypt tracepoint functions
  52  */
  53 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
  54 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
  55
  56 DEFINE_SPINLOCK(zcrypt_list_lock);
  57 LIST_HEAD(zcrypt_card_list);
  58
  59 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
  60 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
  61
  62 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
  63 EXPORT_SYMBOL(zcrypt_rescan_req);
  64
  65 static LIST_HEAD(zcrypt_ops_list);
  66
  67 /* Zcrypt related debug feature stuff. */
  68 debug_info_t *zcrypt_dbf_info;
  69
  70 /*
  71  * Process a rescan of the transport layer.
  72  *
  73  * Returns 1, if the rescan has been processed, otherwise 0.
  74  */
  75 static inline int zcrypt_process_rescan(void)
  76 {
  77         if (atomic_read(&zcrypt_rescan_req)) {
  78                 atomic_set(&zcrypt_rescan_req, 0);
  79                 atomic_inc(&zcrypt_rescan_count);
  80                 ap_bus_force_rescan();
  81                 ZCRYPT_DBF_INFO("%s rescan count=%07d\n", __func__,
  82                                 atomic_inc_return(&zcrypt_rescan_count));
  83                 return 1;
  84         }
  85         return 0;
  86 }
  87
  88 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
  89 {
  90         list_add_tail(&zops->list, &zcrypt_ops_list);
  91 }
  92
  93 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
  94 {
  95         list_del_init(&zops->list);
  96 }
  97
  98 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
  99 {
 100         struct zcrypt_ops *zops;
 101
 102         list_for_each_entry(zops, &zcrypt_ops_list, list)
 103                 if (zops->variant == variant &&
 104                     (!strncmp(zops->name, name, sizeof(zops->name))))
 105                         return zops;
 106         return NULL;
 107 }
 108 EXPORT_SYMBOL(zcrypt_msgtype);
 109
 110 /*
 111  * Multi device nodes extension functions.
 112  */
 113
 114 struct zcdn_device;
 115
 116 static struct class *zcrypt_class;
 117 static dev_t zcrypt_devt;
 118 static struct cdev zcrypt_cdev;
 119
 120 struct zcdn_device {
 121         struct device device;
 122         struct ap_perms perms;
 123 };
 124
 125 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
 126
 127 #define ZCDN_MAX_NAME 32
 128
 129 static int zcdn_create(const char *name);
 130 static int zcdn_destroy(const char *name);
 131
 132 /*
 133  * Find zcdn device by name.
 134  * Returns reference to the zcdn device which needs to be released
 135  * with put_device() after use.
 136  */
 137 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
 138 {
 139         struct device *dev = class_find_device_by_name(zcrypt_class, name);
 140
 141         return dev ? to_zcdn_dev(dev) : NULL;
 142 }
 143
 144 /*
 145  * Find zcdn device by devt value.
 146  * Returns reference to the zcdn device which needs to be released
 147  * with put_device() after use.
 148  */
 149 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
 150 {
 151         struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
 152
 153         return dev ? to_zcdn_dev(dev) : NULL;
 154 }
 155
 156 static ssize_t ioctlmask_show(struct device *dev,
 157                               struct device_attribute *attr,
 158                               char *buf)
 159 {
 160         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 161         int i, n;
 162
 163         if (mutex_lock_interruptible(&ap_perms_mutex))
 164                 return -ERESTARTSYS;
 165
 166         n = sysfs_emit(buf, "0x");
 167         for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
 168                 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.ioctlm[i]);
 169         n += sysfs_emit_at(buf, n, "\n");
 170
 171         mutex_unlock(&ap_perms_mutex);
 172
 173         return n;
 174 }
 175
 176 static ssize_t ioctlmask_store(struct device *dev,
 177                                struct device_attribute *attr,
 178                                const char *buf, size_t count)
 179 {
 180         int rc;
 181         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 182
 183         rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
 184                                AP_IOCTLS, &ap_perms_mutex);
 185         if (rc)
 186                 return rc;
 187
 188         return count;
 189 }
 190
 191 static DEVICE_ATTR_RW(ioctlmask);
 192
 193 static ssize_t apmask_show(struct device *dev,
 194                            struct device_attribute *attr,
 195                            char *buf)
 196 {
 197         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 198         int i, n;
 199
 200         if (mutex_lock_interruptible(&ap_perms_mutex))
 201                 return -ERESTARTSYS;
 202
 203         n = sysfs_emit(buf, "0x");
 204         for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
 205                 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.apm[i]);
 206         n += sysfs_emit_at(buf, n, "\n");
 207
 208         mutex_unlock(&ap_perms_mutex);
 209
 210         return n;
 211 }
 212
 213 static ssize_t apmask_store(struct device *dev,
 214                             struct device_attribute *attr,
 215                             const char *buf, size_t count)
 216 {
 217         int rc;
 218         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 219
 220         rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
 221                                AP_DEVICES, &ap_perms_mutex);
 222         if (rc)
 223                 return rc;
 224
 225         return count;
 226 }
 227
 228 static DEVICE_ATTR_RW(apmask);
 229
 230 static ssize_t aqmask_show(struct device *dev,
 231                            struct device_attribute *attr,
 232                            char *buf)
 233 {
 234         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 235         int i, n;
 236
 237         if (mutex_lock_interruptible(&ap_perms_mutex))
 238                 return -ERESTARTSYS;
 239
 240         n = sysfs_emit(buf, "0x");
 241         for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
 242                 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.aqm[i]);
 243         n += sysfs_emit_at(buf, n, "\n");
 244
 245         mutex_unlock(&ap_perms_mutex);
 246
 247         return n;
 248 }
 249
 250 static ssize_t aqmask_store(struct device *dev,
 251                             struct device_attribute *attr,
 252                             const char *buf, size_t count)
 253 {
 254         int rc;
 255         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 256
 257         rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
 258                                AP_DOMAINS, &ap_perms_mutex);
 259         if (rc)
 260                 return rc;
 261
 262         return count;
 263 }
 264
 265 static DEVICE_ATTR_RW(aqmask);
 266
 267 static ssize_t admask_show(struct device *dev,
 268                            struct device_attribute *attr,
 269                            char *buf)
 270 {
 271         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 272         int i, n;
 273
 274         if (mutex_lock_interruptible(&ap_perms_mutex))
 275                 return -ERESTARTSYS;
 276
 277         n = sysfs_emit(buf, "0x");
 278         for (i = 0; i < sizeof(zcdndev->perms.adm) / sizeof(long); i++)
 279                 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.adm[i]);
 280         n += sysfs_emit_at(buf, n, "\n");
 281
 282         mutex_unlock(&ap_perms_mutex);
 283
 284         return n;
 285 }
 286
 287 static ssize_t admask_store(struct device *dev,
 288                             struct device_attribute *attr,
 289                             const char *buf, size_t count)
 290 {
 291         int rc;
 292         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 293
 294         rc = ap_parse_mask_str(buf, zcdndev->perms.adm,
 295                                AP_DOMAINS, &ap_perms_mutex);
 296         if (rc)
 297                 return rc;
 298
 299         return count;
 300 }
 301
 302 static DEVICE_ATTR_RW(admask);
 303
 304 static struct attribute *zcdn_dev_attrs[] = {
 305         &dev_attr_ioctlmask.attr,
 306         &dev_attr_apmask.attr,
 307         &dev_attr_aqmask.attr,
 308         &dev_attr_admask.attr,
 309         NULL
 310 };
 311
 312 static struct attribute_group zcdn_dev_attr_group = {
 313         .attrs = zcdn_dev_attrs
 314 };
 315
 316 static const struct attribute_group *zcdn_dev_attr_groups[] = {
 317         &zcdn_dev_attr_group,
 318         NULL
 319 };
 320
 321 static ssize_t zcdn_create_store(const struct class *class,
 322                                  const struct class_attribute *attr,
 323                                  const char *buf, size_t count)
 324 {
 325         int rc;
 326         char name[ZCDN_MAX_NAME];
 327
 328         strscpy(name, skip_spaces(buf), sizeof(name));
 329
 330         rc = zcdn_create(strim(name));
 331
 332         return rc ? rc : count;
 333 }
 334
 335 static const struct class_attribute class_attr_zcdn_create =
 336         __ATTR(create, 0600, NULL, zcdn_create_store);
 337
 338 static ssize_t zcdn_destroy_store(const struct class *class,
 339                                   const struct class_attribute *attr,
 340                                   const char *buf, size_t count)
 341 {
 342         int rc;
 343         char name[ZCDN_MAX_NAME];
 344
 345         strscpy(name, skip_spaces(buf), sizeof(name));
 346
 347         rc = zcdn_destroy(strim(name));
 348
 349         return rc ? rc : count;
 350 }
 351
 352 static const struct class_attribute class_attr_zcdn_destroy =
 353         __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
 354
 355 static void zcdn_device_release(struct device *dev)
 356 {
 357         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 358
 359         ZCRYPT_DBF_INFO("%s releasing zcdn device %d:%d\n",
 360                         __func__, MAJOR(dev->devt), MINOR(dev->devt));
 361
 362         kfree(zcdndev);
 363 }
 364
 365 static int zcdn_create(const char *name)
 366 {
 367         dev_t devt;
 368         int i, rc = 0;
 369         char nodename[ZCDN_MAX_NAME];
 370         struct zcdn_device *zcdndev;
 371
 372         if (mutex_lock_interruptible(&ap_perms_mutex))
 373                 return -ERESTARTSYS;
 374
 375         /* check if device node with this name already exists */
 376         if (name[0]) {
 377                 zcdndev = find_zcdndev_by_name(name);
 378                 if (zcdndev) {
 379                         put_device(&zcdndev->device);
 380                         rc = -EEXIST;
 381                         goto unlockout;
 382                 }
 383         }
 384
 385         /* find an unused minor number */
 386         for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
 387                 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
 388                 zcdndev = find_zcdndev_by_devt(devt);
 389                 if (zcdndev)
 390                         put_device(&zcdndev->device);
 391                 else
 392                         break;
 393         }
 394         if (i == ZCRYPT_MAX_MINOR_NODES) {
 395                 rc = -ENOSPC;
 396                 goto unlockout;
 397         }
 398
 399         /* alloc and prepare a new zcdn device */
 400         zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
 401         if (!zcdndev) {
 402                 rc = -ENOMEM;
 403                 goto unlockout;
 404         }
 405         zcdndev->device.release = zcdn_device_release;
 406         zcdndev->device.class = zcrypt_class;
 407         zcdndev->device.devt = devt;
 408         zcdndev->device.groups = zcdn_dev_attr_groups;
 409         if (name[0])
 410                 strncpy(nodename, name, sizeof(nodename));
 411         else
 412                 snprintf(nodename, sizeof(nodename),
 413                          ZCRYPT_NAME "_%d", (int)MINOR(devt));
 414         nodename[sizeof(nodename) - 1] = '\0';
 415         if (dev_set_name(&zcdndev->device, nodename)) {
 416                 rc = -EINVAL;
 417                 goto unlockout;
 418         }
 419         rc = device_register(&zcdndev->device);
 420         if (rc) {
 421                 put_device(&zcdndev->device);
 422                 goto unlockout;
 423         }
 424
 425         ZCRYPT_DBF_INFO("%s created zcdn device %d:%d\n",
 426                         __func__, MAJOR(devt), MINOR(devt));
 427
 428 unlockout:
 429         mutex_unlock(&ap_perms_mutex);
 430         return rc;
 431 }
 432
 433 static int zcdn_destroy(const char *name)
 434 {
 435         int rc = 0;
 436         struct zcdn_device *zcdndev;
 437
 438         if (mutex_lock_interruptible(&ap_perms_mutex))
 439                 return -ERESTARTSYS;
 440
 441         /* try to find this zcdn device */
 442         zcdndev = find_zcdndev_by_name(name);
 443         if (!zcdndev) {
 444                 rc = -ENOENT;
 445                 goto unlockout;
 446         }
 447
 448         /*
 449          * The zcdn device is not hard destroyed. It is subject to
 450          * reference counting and thus just needs to be unregistered.
 451          */
 452         put_device(&zcdndev->device);
 453         device_unregister(&zcdndev->device);
 454
 455 unlockout:
 456         mutex_unlock(&ap_perms_mutex);
 457         return rc;
 458 }
 459
 460 static void zcdn_destroy_all(void)
 461 {
 462         int i;
 463         dev_t devt;
 464         struct zcdn_device *zcdndev;
 465
 466         mutex_lock(&ap_perms_mutex);
 467         for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
 468                 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
 469                 zcdndev = find_zcdndev_by_devt(devt);
 470                 if (zcdndev) {
 471                         put_device(&zcdndev->device);
 472                         device_unregister(&zcdndev->device);
 473                 }
 474         }
 475         mutex_unlock(&ap_perms_mutex);
 476 }
 477
 478 /*
 479  * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
 480  *
 481  * This function is not supported beyond zcrypt 1.3.1.
 482  */
 483 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
 484                            size_t count, loff_t *f_pos)
 485 {
 486         return -EPERM;
 487 }
 488
 489 /*
 490  * zcrypt_write(): Not allowed.
 491  *
 492  * Write is not allowed
 493  */
 494 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
 495                             size_t count, loff_t *f_pos)
 496 {
 497         return -EPERM;
 498 }
 499
 500 /*
 501  * zcrypt_open(): Count number of users.
 502  *
 503  * Device open function to count number of users.
 504  */
 505 static int zcrypt_open(struct inode *inode, struct file *filp)
 506 {
 507         struct ap_perms *perms = &ap_perms;
 508
 509         if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 510                 struct zcdn_device *zcdndev;
 511
 512                 if (mutex_lock_interruptible(&ap_perms_mutex))
 513                         return -ERESTARTSYS;
 514                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 515                 /* find returns a reference, no get_device() needed */
 516                 mutex_unlock(&ap_perms_mutex);
 517                 if (zcdndev)
 518                         perms = &zcdndev->perms;
 519         }
 520         filp->private_data = (void *)perms;
 521
 522         atomic_inc(&zcrypt_open_count);
 523         return stream_open(inode, filp);
 524 }
 525
 526 /*
 527  * zcrypt_release(): Count number of users.
 528  *
 529  * Device close function to count number of users.
 530  */
 531 static int zcrypt_release(struct inode *inode, struct file *filp)
 532 {
 533         if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 534                 struct zcdn_device *zcdndev;
 535
 536                 mutex_lock(&ap_perms_mutex);
 537                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 538                 mutex_unlock(&ap_perms_mutex);
 539                 if (zcdndev) {
 540                         /* 2 puts here: one for find, one for open */
 541                         put_device(&zcdndev->device);
 542                         put_device(&zcdndev->device);
 543                 }
 544         }
 545
 546         atomic_dec(&zcrypt_open_count);
 547         return 0;
 548 }
 549
 550 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
 551                                      unsigned int cmd)
 552 {
 553         int rc = -EPERM;
 554         int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
 555
 556         if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
 557                 if (test_bit_inv(ioctlnr, perms->ioctlm))
 558                         rc = 0;
 559         }
 560
 561         if (rc)
 562                 ZCRYPT_DBF_WARN("%s ioctl check failed: ioctlnr=0x%04x rc=%d\n",
 563                                 __func__, ioctlnr, rc);
 564
 565         return rc;
 566 }
 567
 568 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
 569 {
 570         return test_bit_inv(card, perms->apm) ? true : false;
 571 }
 572
 573 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
 574 {
 575         return test_bit_inv(queue, perms->aqm) ? true : false;
 576 }
 577
 578 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
 579                                                      struct zcrypt_queue *zq,
 580                                                      struct module **pmod,
 581                                                      unsigned int weight)
 582 {
 583         if (!zq || !try_module_get(zq->queue->ap_dev.device.driver->owner))
 584                 return NULL;
 585         zcrypt_queue_get(zq);
 586         get_device(&zq->queue->ap_dev.device);
 587         atomic_add(weight, &zc->load);
 588         atomic_add(weight, &zq->load);
 589         zq->request_count++;
 590         *pmod = zq->queue->ap_dev.device.driver->owner;
 591         return zq;
 592 }
 593
 594 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
 595                                      struct zcrypt_queue *zq,
 596                                      struct module *mod,
 597                                      unsigned int weight)
 598 {
 599         zq->request_count--;
 600         atomic_sub(weight, &zc->load);
 601         atomic_sub(weight, &zq->load);
 602         put_device(&zq->queue->ap_dev.device);
 603         zcrypt_queue_put(zq);
 604         module_put(mod);
 605 }
 606
 607 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
 608                                        struct zcrypt_card *pref_zc,
 609                                        unsigned int weight,
 610                                        unsigned int pref_weight)
 611 {
 612         if (!pref_zc)
 613                 return true;
 614         weight += atomic_read(&zc->load);
 615         pref_weight += atomic_read(&pref_zc->load);
 616         if (weight == pref_weight)
 617                 return atomic64_read(&zc->card->total_request_count) <
 618                         atomic64_read(&pref_zc->card->total_request_count);
 619         return weight < pref_weight;
 620 }
 621
 622 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
 623                                         struct zcrypt_queue *pref_zq,
 624                                         unsigned int weight,
 625                                         unsigned int pref_weight)
 626 {
 627         if (!pref_zq)
 628                 return true;
 629         weight += atomic_read(&zq->load);
 630         pref_weight += atomic_read(&pref_zq->load);
 631         if (weight == pref_weight)
 632                 return zq->queue->total_request_count <
 633                         pref_zq->queue->total_request_count;
 634         return weight < pref_weight;
 635 }
 636
 637 /*
 638  * zcrypt ioctls.
 639  */
 640 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
 641                                struct zcrypt_track *tr,
 642                                struct ica_rsa_modexpo *mex)
 643 {
 644         struct zcrypt_card *zc, *pref_zc;
 645         struct zcrypt_queue *zq, *pref_zq;
 646         struct ap_message ap_msg;
 647         unsigned int wgt = 0, pref_wgt = 0;
 648         unsigned int func_code;
 649         int cpen, qpen, qid = 0, rc = -ENODEV;
 650         struct module *mod;
 651
 652         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
 653
 654         ap_init_message(&ap_msg);
 655
 656         if (mex->outputdatalength < mex->inputdatalength) {
 657                 func_code = 0;
 658                 rc = -EINVAL;
 659                 goto out;
 660         }
 661
 662         /*
 663          * As long as outputdatalength is big enough, we can set the
 664          * outputdatalength equal to the inputdatalength, since that is the
 665          * number of bytes we will copy in any case
 666          */
 667         mex->outputdatalength = mex->inputdatalength;
 668
 669         rc = get_rsa_modex_fc(mex, &func_code);
 670         if (rc)
 671                 goto out;
 672
 673         pref_zc = NULL;
 674         pref_zq = NULL;
 675         spin_lock(&zcrypt_list_lock);
 676         for_each_zcrypt_card(zc) {
 677                 /* Check for usable accelerator or CCA card */
 678                 if (!zc->online || !zc->card->config || zc->card->chkstop ||
 679                     !(zc->card->functions & 0x18000000))
 680                         continue;
 681                 /* Check for size limits */
 682                 if (zc->min_mod_size > mex->inputdatalength ||
 683                     zc->max_mod_size < mex->inputdatalength)
 684                         continue;
 685                 /* check if device node has admission for this card */
 686                 if (!zcrypt_check_card(perms, zc->card->id))
 687                         continue;
 688                 /* get weight index of the card device  */
 689                 wgt = zc->speed_rating[func_code];
 690                 /* penalty if this msg was previously sent via this card */
 691                 cpen = (tr && tr->again_counter && tr->last_qid &&
 692                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
 693                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
 694                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 695                         continue;
 696                 for_each_zcrypt_queue(zq, zc) {
 697                         /* check if device is usable and eligible */
 698                         if (!zq->online || !zq->ops->rsa_modexpo ||
 699                             !zq->queue->config || zq->queue->chkstop)
 700                                 continue;
 701                         /* check if device node has admission for this queue */
 702                         if (!zcrypt_check_queue(perms,
 703                                                 AP_QID_QUEUE(zq->queue->qid)))
 704                                 continue;
 705                         /* penalty if the msg was previously sent at this qid */
 706                         qpen = (tr && tr->again_counter && tr->last_qid &&
 707                                 tr->last_qid == zq->queue->qid) ?
 708                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
 709                         if (!zcrypt_queue_compare(zq, pref_zq,
 710                                                   wgt + cpen + qpen, pref_wgt))
 711                                 continue;
 712                         pref_zc = zc;
 713                         pref_zq = zq;
 714                         pref_wgt = wgt + cpen + qpen;
 715                 }
 716         }
 717         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
 718         spin_unlock(&zcrypt_list_lock);
 719
 720         if (!pref_zq) {
 721                 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
 722                                __func__);
 723                 rc = -ENODEV;
 724                 goto out;
 725         }
 726
 727         qid = pref_zq->queue->qid;
 728         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
 729
 730         spin_lock(&zcrypt_list_lock);
 731         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 732         spin_unlock(&zcrypt_list_lock);
 733
 734 out:
 735         ap_release_message(&ap_msg);
 736         if (tr) {
 737                 tr->last_rc = rc;
 738                 tr->last_qid = qid;
 739         }
 740         trace_s390_zcrypt_rep(mex, func_code, rc,
 741                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 742         return rc;
 743 }
 744
 745 static long zcrypt_rsa_crt(struct ap_perms *perms,
 746                            struct zcrypt_track *tr,
 747                            struct ica_rsa_modexpo_crt *crt)
 748 {
 749         struct zcrypt_card *zc, *pref_zc;
 750         struct zcrypt_queue *zq, *pref_zq;
 751         struct ap_message ap_msg;
 752         unsigned int wgt = 0, pref_wgt = 0;
 753         unsigned int func_code;
 754         int cpen, qpen, qid = 0, rc = -ENODEV;
 755         struct module *mod;
 756
 757         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
 758
 759         ap_init_message(&ap_msg);
 760
 761         if (crt->outputdatalength < crt->inputdatalength) {
 762                 func_code = 0;
 763                 rc = -EINVAL;
 764                 goto out;
 765         }
 766
 767         /*
 768          * As long as outputdatalength is big enough, we can set the
 769          * outputdatalength equal to the inputdatalength, since that is the
 770          * number of bytes we will copy in any case
 771          */
 772         crt->outputdatalength = crt->inputdatalength;
 773
 774         rc = get_rsa_crt_fc(crt, &func_code);
 775         if (rc)
 776                 goto out;
 777
 778         pref_zc = NULL;
 779         pref_zq = NULL;
 780         spin_lock(&zcrypt_list_lock);
 781         for_each_zcrypt_card(zc) {
 782                 /* Check for usable accelerator or CCA card */
 783                 if (!zc->online || !zc->card->config || zc->card->chkstop ||
 784                     !(zc->card->functions & 0x18000000))
 785                         continue;
 786                 /* Check for size limits */
 787                 if (zc->min_mod_size > crt->inputdatalength ||
 788                     zc->max_mod_size < crt->inputdatalength)
 789                         continue;
 790                 /* check if device node has admission for this card */
 791                 if (!zcrypt_check_card(perms, zc->card->id))
 792                         continue;
 793                 /* get weight index of the card device  */
 794                 wgt = zc->speed_rating[func_code];
 795                 /* penalty if this msg was previously sent via this card */
 796                 cpen = (tr && tr->again_counter && tr->last_qid &&
 797                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
 798                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
 799                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 800                         continue;
 801                 for_each_zcrypt_queue(zq, zc) {
 802                         /* check if device is usable and eligible */
 803                         if (!zq->online || !zq->ops->rsa_modexpo_crt ||
 804                             !zq->queue->config || zq->queue->chkstop)
 805                                 continue;
 806                         /* check if device node has admission for this queue */
 807                         if (!zcrypt_check_queue(perms,
 808                                                 AP_QID_QUEUE(zq->queue->qid)))
 809                                 continue;
 810                         /* penalty if the msg was previously sent at this qid */
 811                         qpen = (tr && tr->again_counter && tr->last_qid &&
 812                                 tr->last_qid == zq->queue->qid) ?
 813                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
 814                         if (!zcrypt_queue_compare(zq, pref_zq,
 815                                                   wgt + cpen + qpen, pref_wgt))
 816                                 continue;
 817                         pref_zc = zc;
 818                         pref_zq = zq;
 819                         pref_wgt = wgt + cpen + qpen;
 820                 }
 821         }
 822         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
 823         spin_unlock(&zcrypt_list_lock);
 824
 825         if (!pref_zq) {
 826                 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
 827                                __func__);
 828                 rc = -ENODEV;
 829                 goto out;
 830         }
 831
 832         qid = pref_zq->queue->qid;
 833         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
 834
 835         spin_lock(&zcrypt_list_lock);
 836         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 837         spin_unlock(&zcrypt_list_lock);
 838
 839 out:
 840         ap_release_message(&ap_msg);
 841         if (tr) {
 842                 tr->last_rc = rc;
 843                 tr->last_qid = qid;
 844         }
 845         trace_s390_zcrypt_rep(crt, func_code, rc,
 846                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 847         return rc;
 848 }
 849
 850 static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
 851                               struct zcrypt_track *tr,
 852                               struct ica_xcRB *xcrb)
 853 {
 854         struct zcrypt_card *zc, *pref_zc;
 855         struct zcrypt_queue *zq, *pref_zq;
 856         struct ap_message ap_msg;
 857         unsigned int wgt = 0, pref_wgt = 0;
 858         unsigned int func_code;
 859         unsigned short *domain, tdom;
 860         int cpen, qpen, qid = 0, rc = -ENODEV;
 861         struct module *mod;
 862
 863         trace_s390_zcrypt_req(xcrb, TB_ZSECSENDCPRB);
 864
 865         xcrb->status = 0;
 866         ap_init_message(&ap_msg);
 867
 868         rc = prep_cca_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
 869         if (rc)
 870                 goto out;
 871
 872         tdom = *domain;
 873         if (perms != &ap_perms && tdom < AP_DOMAINS) {
 874                 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
 875                         if (!test_bit_inv(tdom, perms->adm)) {
 876                                 rc = -ENODEV;
 877                                 goto out;
 878                         }
 879                 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
 880                         rc = -EOPNOTSUPP;
 881                         goto out;
 882                 }
 883         }
 884         /*
 885          * If a valid target domain is set and this domain is NOT a usage
 886          * domain but a control only domain, autoselect target domain.
 887          */
 888         if (tdom < AP_DOMAINS &&
 889             !ap_test_config_usage_domain(tdom) &&
 890             ap_test_config_ctrl_domain(tdom))
 891                 tdom = AUTOSEL_DOM;
 892
 893         pref_zc = NULL;
 894         pref_zq = NULL;
 895         spin_lock(&zcrypt_list_lock);
 896         for_each_zcrypt_card(zc) {
 897                 /* Check for usable CCA card */
 898                 if (!zc->online || !zc->card->config || zc->card->chkstop ||
 899                     !(zc->card->functions & 0x10000000))
 900                         continue;
 901                 /* Check for user selected CCA card */
 902                 if (xcrb->user_defined != AUTOSELECT &&
 903                     xcrb->user_defined != zc->card->id)
 904                         continue;
 905                 /* check if request size exceeds card max msg size */
 906                 if (ap_msg.len > zc->card->maxmsgsize)
 907                         continue;
 908                 /* check if device node has admission for this card */
 909                 if (!zcrypt_check_card(perms, zc->card->id))
 910                         continue;
 911                 /* get weight index of the card device  */
 912                 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 913                 /* penalty if this msg was previously sent via this card */
 914                 cpen = (tr && tr->again_counter && tr->last_qid &&
 915                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
 916                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
 917                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 918                         continue;
 919                 for_each_zcrypt_queue(zq, zc) {
 920                         /* check for device usable and eligible */
 921                         if (!zq->online || !zq->ops->send_cprb ||
 922                             !zq->queue->config || zq->queue->chkstop ||
 923                             (tdom != AUTOSEL_DOM &&
 924                              tdom != AP_QID_QUEUE(zq->queue->qid)))
 925                                 continue;
 926                         /* check if device node has admission for this queue */
 927                         if (!zcrypt_check_queue(perms,
 928                                                 AP_QID_QUEUE(zq->queue->qid)))
 929                                 continue;
 930                         /* penalty if the msg was previously sent at this qid */
 931                         qpen = (tr && tr->again_counter && tr->last_qid &&
 932                                 tr->last_qid == zq->queue->qid) ?
 933                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
 934                         if (!zcrypt_queue_compare(zq, pref_zq,
 935                                                   wgt + cpen + qpen, pref_wgt))
 936                                 continue;
 937                         pref_zc = zc;
 938                         pref_zq = zq;
 939                         pref_wgt = wgt + cpen + qpen;
 940                 }
 941         }
 942         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
 943         spin_unlock(&zcrypt_list_lock);
 944
 945         if (!pref_zq) {
 946                 ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n",
 947                                __func__, xcrb->user_defined, *domain);
 948                 rc = -ENODEV;
 949                 goto out;
 950         }
 951
 952         /* in case of auto select, provide the correct domain */
 953         qid = pref_zq->queue->qid;
 954         if (*domain == AUTOSEL_DOM)
 955                 *domain = AP_QID_QUEUE(qid);
 956
 957         rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcrb, &ap_msg);
 958
 959         spin_lock(&zcrypt_list_lock);
 960         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 961         spin_unlock(&zcrypt_list_lock);
 962
 963 out:
 964         ap_release_message(&ap_msg);
 965         if (tr) {
 966                 tr->last_rc = rc;
 967                 tr->last_qid = qid;
 968         }
 969         trace_s390_zcrypt_rep(xcrb, func_code, rc,
 970                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 971         return rc;
 972 }
 973
 974 long zcrypt_send_cprb(struct ica_xcRB *xcrb)
 975 {
 976         return _zcrypt_send_cprb(false, &ap_perms, NULL, xcrb);
 977 }
 978 EXPORT_SYMBOL(zcrypt_send_cprb);
 979
 980 static bool is_desired_ep11_card(unsigned int dev_id,
 981                                  unsigned short target_num,
 982                                  struct ep11_target_dev *targets)
 983 {
 984         while (target_num-- > 0) {
 985                 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
 986                         return true;
 987                 targets++;
 988         }
 989         return false;
 990 }
 991
 992 static bool is_desired_ep11_queue(unsigned int dev_qid,
 993                                   unsigned short target_num,
 994                                   struct ep11_target_dev *targets)
 995 {
 996         int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
 997
 998         while (target_num-- > 0) {
 999                 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
1000                     (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
1001                         return true;
1002                 targets++;
1003         }
1004         return false;
1005 }
1006
1007 static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
1008                                    struct zcrypt_track *tr,
1009                                    struct ep11_urb *xcrb)
1010 {
1011         struct zcrypt_card *zc, *pref_zc;
1012         struct zcrypt_queue *zq, *pref_zq;
1013         struct ep11_target_dev *targets;
1014         unsigned short target_num;
1015         unsigned int wgt = 0, pref_wgt = 0;
1016         unsigned int func_code, domain;
1017         struct ap_message ap_msg;
1018         int cpen, qpen, qid = 0, rc = -ENODEV;
1019         struct module *mod;
1020
1021         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
1022
1023         ap_init_message(&ap_msg);
1024
1025         target_num = (unsigned short)xcrb->targets_num;
1026
1027         /* empty list indicates autoselect (all available targets) */
1028         targets = NULL;
1029         if (target_num != 0) {
1030                 struct ep11_target_dev __user *uptr;
1031
1032                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
1033                 if (!targets) {
1034                         func_code = 0;
1035                         rc = -ENOMEM;
1036                         goto out;
1037                 }
1038
1039                 uptr = (struct ep11_target_dev __force __user *)xcrb->targets;
1040                 if (z_copy_from_user(userspace, targets, uptr,
1041                                      target_num * sizeof(*targets))) {
1042                         func_code = 0;
1043                         rc = -EFAULT;
1044                         goto out_free;
1045                 }
1046         }
1047
1048         rc = prep_ep11_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
1049         if (rc)
1050                 goto out_free;
1051
1052         if (perms != &ap_perms && domain < AUTOSEL_DOM) {
1053                 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
1054                         if (!test_bit_inv(domain, perms->adm)) {
1055                                 rc = -ENODEV;
1056                                 goto out_free;
1057                         }
1058                 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
1059                         rc = -EOPNOTSUPP;
1060                         goto out_free;
1061                 }
1062         }
1063
1064         pref_zc = NULL;
1065         pref_zq = NULL;
1066         spin_lock(&zcrypt_list_lock);
1067         for_each_zcrypt_card(zc) {
1068                 /* Check for usable EP11 card */
1069                 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1070                     !(zc->card->functions & 0x04000000))
1071                         continue;
1072                 /* Check for user selected EP11 card */
1073                 if (targets &&
1074                     !is_desired_ep11_card(zc->card->id, target_num, targets))
1075                         continue;
1076                 /* check if request size exceeds card max msg size */
1077                 if (ap_msg.len > zc->card->maxmsgsize)
1078                         continue;
1079                 /* check if device node has admission for this card */
1080                 if (!zcrypt_check_card(perms, zc->card->id))
1081                         continue;
1082                 /* get weight index of the card device  */
1083                 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1084                 /* penalty if this msg was previously sent via this card */
1085                 cpen = (tr && tr->again_counter && tr->last_qid &&
1086                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
1087                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
1088                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
1089                         continue;
1090                 for_each_zcrypt_queue(zq, zc) {
1091                         /* check if device is usable and eligible */
1092                         if (!zq->online || !zq->ops->send_ep11_cprb ||
1093                             !zq->queue->config || zq->queue->chkstop ||
1094                             (targets &&
1095                              !is_desired_ep11_queue(zq->queue->qid,
1096                                                     target_num, targets)))
1097                                 continue;
1098                         /* check if device node has admission for this queue */
1099                         if (!zcrypt_check_queue(perms,
1100                                                 AP_QID_QUEUE(zq->queue->qid)))
1101                                 continue;
1102                         /* penalty if the msg was previously sent at this qid */
1103                         qpen = (tr && tr->again_counter && tr->last_qid &&
1104                                 tr->last_qid == zq->queue->qid) ?
1105                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
1106                         if (!zcrypt_queue_compare(zq, pref_zq,
1107                                                   wgt + cpen + qpen, pref_wgt))
1108                                 continue;
1109                         pref_zc = zc;
1110                         pref_zq = zq;
1111                         pref_wgt = wgt + cpen + qpen;
1112                 }
1113         }
1114         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1115         spin_unlock(&zcrypt_list_lock);
1116
1117         if (!pref_zq) {
1118                 if (targets && target_num == 1) {
1119                         ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n",
1120                                        __func__, (int)targets->ap_id,
1121                                        (int)targets->dom_id);
1122                 } else if (targets) {
1123                         ZCRYPT_DBF_DBG("%s no match for %d target addrs => ENODEV\n",
1124                                        __func__, (int)target_num);
1125                 } else {
1126                         ZCRYPT_DBF_DBG("%s no match for address ff.ffff => ENODEV\n",
1127                                        __func__);
1128                 }
1129                 rc = -ENODEV;
1130                 goto out_free;
1131         }
1132
1133         qid = pref_zq->queue->qid;
1134         rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
1135
1136         spin_lock(&zcrypt_list_lock);
1137         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1138         spin_unlock(&zcrypt_list_lock);
1139
1140 out_free:
1141         kfree(targets);
1142 out:
1143         ap_release_message(&ap_msg);
1144         if (tr) {
1145                 tr->last_rc = rc;
1146                 tr->last_qid = qid;
1147         }
1148         trace_s390_zcrypt_rep(xcrb, func_code, rc,
1149                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1150         return rc;
1151 }
1152
1153 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1154 {
1155         return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb);
1156 }
1157 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1158
1159 static long zcrypt_rng(char *buffer)
1160 {
1161         struct zcrypt_card *zc, *pref_zc;
1162         struct zcrypt_queue *zq, *pref_zq;
1163         unsigned int wgt = 0, pref_wgt = 0;
1164         unsigned int func_code;
1165         struct ap_message ap_msg;
1166         unsigned int domain;
1167         int qid = 0, rc = -ENODEV;
1168         struct module *mod;
1169
1170         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1171
1172         ap_init_message(&ap_msg);
1173         rc = prep_rng_ap_msg(&ap_msg, &func_code, &domain);
1174         if (rc)
1175                 goto out;
1176
1177         pref_zc = NULL;
1178         pref_zq = NULL;
1179         spin_lock(&zcrypt_list_lock);
1180         for_each_zcrypt_card(zc) {
1181                 /* Check for usable CCA card */
1182                 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1183                     !(zc->card->functions & 0x10000000))
1184                         continue;
1185                 /* get weight index of the card device  */
1186                 wgt = zc->speed_rating[func_code];
1187                 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
1188                         continue;
1189                 for_each_zcrypt_queue(zq, zc) {
1190                         /* check if device is usable and eligible */
1191                         if (!zq->online || !zq->ops->rng ||
1192                             !zq->queue->config || zq->queue->chkstop)
1193                                 continue;
1194                         if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
1195                                 continue;
1196                         pref_zc = zc;
1197                         pref_zq = zq;
1198                         pref_wgt = wgt;
1199                 }
1200         }
1201         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1202         spin_unlock(&zcrypt_list_lock);
1203
1204         if (!pref_zq) {
1205                 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
1206                                __func__);
1207                 rc = -ENODEV;
1208                 goto out;
1209         }
1210
1211         qid = pref_zq->queue->qid;
1212         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1213
1214         spin_lock(&zcrypt_list_lock);
1215         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1216         spin_unlock(&zcrypt_list_lock);
1217
1218 out:
1219         ap_release_message(&ap_msg);
1220         trace_s390_zcrypt_rep(buffer, func_code, rc,
1221                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1222         return rc;
1223 }
1224
1225 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1226 {
1227         struct zcrypt_card *zc;
1228         struct zcrypt_queue *zq;
1229         struct zcrypt_device_status *stat;
1230         int card, queue;
1231
1232         memset(devstatus, 0, MAX_ZDEV_ENTRIES
1233                * sizeof(struct zcrypt_device_status));
1234
1235         spin_lock(&zcrypt_list_lock);
1236         for_each_zcrypt_card(zc) {
1237                 for_each_zcrypt_queue(zq, zc) {
1238                         card = AP_QID_CARD(zq->queue->qid);
1239                         if (card >= MAX_ZDEV_CARDIDS)
1240                                 continue;
1241                         queue = AP_QID_QUEUE(zq->queue->qid);
1242                         stat = &devstatus[card * AP_DOMAINS + queue];
1243                         stat->hwtype = zc->card->ap_dev.device_type;
1244                         stat->functions = zc->card->functions >> 26;
1245                         stat->qid = zq->queue->qid;
1246                         stat->online = zq->online ? 0x01 : 0x00;
1247                 }
1248         }
1249         spin_unlock(&zcrypt_list_lock);
1250 }
1251
1252 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1253 {
1254         struct zcrypt_card *zc;
1255         struct zcrypt_queue *zq;
1256         struct zcrypt_device_status_ext *stat;
1257         int card, queue;
1258
1259         memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1260                * sizeof(struct zcrypt_device_status_ext));
1261
1262         spin_lock(&zcrypt_list_lock);
1263         for_each_zcrypt_card(zc) {
1264                 for_each_zcrypt_queue(zq, zc) {
1265                         card = AP_QID_CARD(zq->queue->qid);
1266                         queue = AP_QID_QUEUE(zq->queue->qid);
1267                         stat = &devstatus[card * AP_DOMAINS + queue];
1268                         stat->hwtype = zc->card->ap_dev.device_type;
1269                         stat->functions = zc->card->functions >> 26;
1270                         stat->qid = zq->queue->qid;
1271                         stat->online = zq->online ? 0x01 : 0x00;
1272                 }
1273         }
1274         spin_unlock(&zcrypt_list_lock);
1275 }
1276 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1277
1278 int zcrypt_device_status_ext(int card, int queue,
1279                              struct zcrypt_device_status_ext *devstat)
1280 {
1281         struct zcrypt_card *zc;
1282         struct zcrypt_queue *zq;
1283
1284         memset(devstat, 0, sizeof(*devstat));
1285
1286         spin_lock(&zcrypt_list_lock);
1287         for_each_zcrypt_card(zc) {
1288                 for_each_zcrypt_queue(zq, zc) {
1289                         if (card == AP_QID_CARD(zq->queue->qid) &&
1290                             queue == AP_QID_QUEUE(zq->queue->qid)) {
1291                                 devstat->hwtype = zc->card->ap_dev.device_type;
1292                                 devstat->functions = zc->card->functions >> 26;
1293                                 devstat->qid = zq->queue->qid;
1294                                 devstat->online = zq->online ? 0x01 : 0x00;
1295                                 spin_unlock(&zcrypt_list_lock);
1296                                 return 0;
1297                         }
1298                 }
1299         }
1300         spin_unlock(&zcrypt_list_lock);
1301
1302         return -ENODEV;
1303 }
1304 EXPORT_SYMBOL(zcrypt_device_status_ext);
1305
1306 static void zcrypt_status_mask(char status[], size_t max_adapters)
1307 {
1308         struct zcrypt_card *zc;
1309         struct zcrypt_queue *zq;
1310         int card;
1311
1312         memset(status, 0, max_adapters);
1313         spin_lock(&zcrypt_list_lock);
1314         for_each_zcrypt_card(zc) {
1315                 for_each_zcrypt_queue(zq, zc) {
1316                         card = AP_QID_CARD(zq->queue->qid);
1317                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1318                             card >= max_adapters)
1319                                 continue;
1320                         status[card] = zc->online ? zc->user_space_type : 0x0d;
1321                 }
1322         }
1323         spin_unlock(&zcrypt_list_lock);
1324 }
1325
1326 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1327 {
1328         struct zcrypt_card *zc;
1329         struct zcrypt_queue *zq;
1330         int card;
1331
1332         memset(qdepth, 0, max_adapters);
1333         spin_lock(&zcrypt_list_lock);
1334         local_bh_disable();
1335         for_each_zcrypt_card(zc) {
1336                 for_each_zcrypt_queue(zq, zc) {
1337                         card = AP_QID_CARD(zq->queue->qid);
1338                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1339                             card >= max_adapters)
1340                                 continue;
1341                         spin_lock(&zq->queue->lock);
1342                         qdepth[card] =
1343                                 zq->queue->pendingq_count +
1344                                 zq->queue->requestq_count;
1345                         spin_unlock(&zq->queue->lock);
1346                 }
1347         }
1348         local_bh_enable();
1349         spin_unlock(&zcrypt_list_lock);
1350 }
1351
1352 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1353 {
1354         struct zcrypt_card *zc;
1355         struct zcrypt_queue *zq;
1356         int card;
1357         u64 cnt;
1358
1359         memset(reqcnt, 0, sizeof(int) * max_adapters);
1360         spin_lock(&zcrypt_list_lock);
1361         local_bh_disable();
1362         for_each_zcrypt_card(zc) {
1363                 for_each_zcrypt_queue(zq, zc) {
1364                         card = AP_QID_CARD(zq->queue->qid);
1365                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1366                             card >= max_adapters)
1367                                 continue;
1368                         spin_lock(&zq->queue->lock);
1369                         cnt = zq->queue->total_request_count;
1370                         spin_unlock(&zq->queue->lock);
1371                         reqcnt[card] = (cnt < UINT_MAX) ? (u32)cnt : UINT_MAX;
1372                 }
1373         }
1374         local_bh_enable();
1375         spin_unlock(&zcrypt_list_lock);
1376 }
1377
1378 static int zcrypt_pendingq_count(void)
1379 {
1380         struct zcrypt_card *zc;
1381         struct zcrypt_queue *zq;
1382         int pendingq_count;
1383
1384         pendingq_count = 0;
1385         spin_lock(&zcrypt_list_lock);
1386         local_bh_disable();
1387         for_each_zcrypt_card(zc) {
1388                 for_each_zcrypt_queue(zq, zc) {
1389                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1390                                 continue;
1391                         spin_lock(&zq->queue->lock);
1392                         pendingq_count += zq->queue->pendingq_count;
1393                         spin_unlock(&zq->queue->lock);
1394                 }
1395         }
1396         local_bh_enable();
1397         spin_unlock(&zcrypt_list_lock);
1398         return pendingq_count;
1399 }
1400
1401 static int zcrypt_requestq_count(void)
1402 {
1403         struct zcrypt_card *zc;
1404         struct zcrypt_queue *zq;
1405         int requestq_count;
1406
1407         requestq_count = 0;
1408         spin_lock(&zcrypt_list_lock);
1409         local_bh_disable();
1410         for_each_zcrypt_card(zc) {
1411                 for_each_zcrypt_queue(zq, zc) {
1412                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1413                                 continue;
1414                         spin_lock(&zq->queue->lock);
1415                         requestq_count += zq->queue->requestq_count;
1416                         spin_unlock(&zq->queue->lock);
1417                 }
1418         }
1419         local_bh_enable();
1420         spin_unlock(&zcrypt_list_lock);
1421         return requestq_count;
1422 }
1423
1424 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1425 {
1426         int rc;
1427         struct zcrypt_track tr;
1428         struct ica_rsa_modexpo mex;
1429         struct ica_rsa_modexpo __user *umex = (void __user *)arg;
1430
1431         memset(&tr, 0, sizeof(tr));
1432         if (copy_from_user(&mex, umex, sizeof(mex)))
1433                 return -EFAULT;
1434
1435         do {
1436                 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1437                 if (rc == -EAGAIN)
1438                         tr.again_counter++;
1439         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1440         /* on failure: retry once again after a requested rescan */
1441         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1442                 do {
1443                         rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1444                         if (rc == -EAGAIN)
1445                                 tr.again_counter++;
1446                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1447         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1448                 rc = -EIO;
1449         if (rc) {
1450                 ZCRYPT_DBF_DBG("ioctl ICARSAMODEXPO rc=%d\n", rc);
1451                 return rc;
1452         }
1453         return put_user(mex.outputdatalength, &umex->outputdatalength);
1454 }
1455
1456 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1457 {
1458         int rc;
1459         struct zcrypt_track tr;
1460         struct ica_rsa_modexpo_crt crt;
1461         struct ica_rsa_modexpo_crt __user *ucrt = (void __user *)arg;
1462
1463         memset(&tr, 0, sizeof(tr));
1464         if (copy_from_user(&crt, ucrt, sizeof(crt)))
1465                 return -EFAULT;
1466
1467         do {
1468                 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1469                 if (rc == -EAGAIN)
1470                         tr.again_counter++;
1471         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1472         /* on failure: retry once again after a requested rescan */
1473         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1474                 do {
1475                         rc = zcrypt_rsa_crt(perms, &tr, &crt);
1476                         if (rc == -EAGAIN)
1477                                 tr.again_counter++;
1478                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1479         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1480                 rc = -EIO;
1481         if (rc) {
1482                 ZCRYPT_DBF_DBG("ioctl ICARSACRT rc=%d\n", rc);
1483                 return rc;
1484         }
1485         return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1486 }
1487
1488 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1489 {
1490         int rc;
1491         struct ica_xcRB xcrb;
1492         struct zcrypt_track tr;
1493         struct ica_xcRB __user *uxcrb = (void __user *)arg;
1494
1495         memset(&tr, 0, sizeof(tr));
1496         if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1497                 return -EFAULT;
1498
1499         do {
1500                 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1501                 if (rc == -EAGAIN)
1502                         tr.again_counter++;
1503         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1504         /* on failure: retry once again after a requested rescan */
1505         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1506                 do {
1507                         rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1508                         if (rc == -EAGAIN)
1509                                 tr.again_counter++;
1510                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1511         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1512                 rc = -EIO;
1513         if (rc)
1514                 ZCRYPT_DBF_DBG("ioctl ZSENDCPRB rc=%d status=0x%x\n",
1515                                rc, xcrb.status);
1516         if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1517                 return -EFAULT;
1518         return rc;
1519 }
1520
1521 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1522 {
1523         int rc;
1524         struct ep11_urb xcrb;
1525         struct zcrypt_track tr;
1526         struct ep11_urb __user *uxcrb = (void __user *)arg;
1527
1528         memset(&tr, 0, sizeof(tr));
1529         if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1530                 return -EFAULT;
1531
1532         do {
1533                 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1534                 if (rc == -EAGAIN)
1535                         tr.again_counter++;
1536         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1537         /* on failure: retry once again after a requested rescan */
1538         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1539                 do {
1540                         rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1541                         if (rc == -EAGAIN)
1542                                 tr.again_counter++;
1543                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1544         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1545                 rc = -EIO;
1546         if (rc)
1547                 ZCRYPT_DBF_DBG("ioctl ZSENDEP11CPRB rc=%d\n", rc);
1548         if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1549                 return -EFAULT;
1550         return rc;
1551 }
1552
1553 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1554                                   unsigned long arg)
1555 {
1556         int rc;
1557         struct ap_perms *perms =
1558                 (struct ap_perms *)filp->private_data;
1559
1560         rc = zcrypt_check_ioctl(perms, cmd);
1561         if (rc)
1562                 return rc;
1563
1564         switch (cmd) {
1565         case ICARSAMODEXPO:
1566                 return icarsamodexpo_ioctl(perms, arg);
1567         case ICARSACRT:
1568                 return icarsacrt_ioctl(perms, arg);
1569         case ZSECSENDCPRB:
1570                 return zsecsendcprb_ioctl(perms, arg);
1571         case ZSENDEP11CPRB:
1572                 return zsendep11cprb_ioctl(perms, arg);
1573         case ZCRYPT_DEVICE_STATUS: {
1574                 struct zcrypt_device_status_ext *device_status;
1575                 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1576                         * sizeof(struct zcrypt_device_status_ext);
1577
1578                 device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT,
1579                                                sizeof(struct zcrypt_device_status_ext),
1580                                                GFP_KERNEL);
1581                 if (!device_status)
1582                         return -ENOMEM;
1583                 zcrypt_device_status_mask_ext(device_status);
1584                 if (copy_to_user((char __user *)arg, device_status,
1585                                  total_size))
1586                         rc = -EFAULT;
1587                 kvfree(device_status);
1588                 return rc;
1589         }
1590         case ZCRYPT_STATUS_MASK: {
1591                 char status[AP_DEVICES];
1592
1593                 zcrypt_status_mask(status, AP_DEVICES);
1594                 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1595                         return -EFAULT;
1596                 return 0;
1597         }
1598         case ZCRYPT_QDEPTH_MASK: {
1599                 char qdepth[AP_DEVICES];
1600
1601                 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1602                 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1603                         return -EFAULT;
1604                 return 0;
1605         }
1606         case ZCRYPT_PERDEV_REQCNT: {
1607                 u32 *reqcnt;
1608
1609                 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1610                 if (!reqcnt)
1611                         return -ENOMEM;
1612                 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1613                 if (copy_to_user((int __user *)arg, reqcnt,
1614                                  sizeof(u32) * AP_DEVICES))
1615                         rc = -EFAULT;
1616                 kfree(reqcnt);
1617                 return rc;
1618         }
1619         case Z90STAT_REQUESTQ_COUNT:
1620                 return put_user(zcrypt_requestq_count(), (int __user *)arg);
1621         case Z90STAT_PENDINGQ_COUNT:
1622                 return put_user(zcrypt_pendingq_count(), (int __user *)arg);
1623         case Z90STAT_TOTALOPEN_COUNT:
1624                 return put_user(atomic_read(&zcrypt_open_count),
1625                                 (int __user *)arg);
1626         case Z90STAT_DOMAIN_INDEX:
1627                 return put_user(ap_domain_index, (int __user *)arg);
1628         /*
1629          * Deprecated ioctls
1630          */
1631         case ZDEVICESTATUS: {
1632                 /* the old ioctl supports only 64 adapters */
1633                 struct zcrypt_device_status *device_status;
1634                 size_t total_size = MAX_ZDEV_ENTRIES
1635                         * sizeof(struct zcrypt_device_status);
1636
1637                 device_status = kzalloc(total_size, GFP_KERNEL);
1638                 if (!device_status)
1639                         return -ENOMEM;
1640                 zcrypt_device_status_mask(device_status);
1641                 if (copy_to_user((char __user *)arg, device_status,
1642                                  total_size))
1643                         rc = -EFAULT;
1644                 kfree(device_status);
1645                 return rc;
1646         }
1647         case Z90STAT_STATUS_MASK: {
1648                 /* the old ioctl supports only 64 adapters */
1649                 char status[MAX_ZDEV_CARDIDS];
1650
1651                 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1652                 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1653                         return -EFAULT;
1654                 return 0;
1655         }
1656         case Z90STAT_QDEPTH_MASK: {
1657                 /* the old ioctl supports only 64 adapters */
1658                 char qdepth[MAX_ZDEV_CARDIDS];
1659
1660                 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1661                 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1662                         return -EFAULT;
1663                 return 0;
1664         }
1665         case Z90STAT_PERDEV_REQCNT: {
1666                 /* the old ioctl supports only 64 adapters */
1667                 u32 reqcnt[MAX_ZDEV_CARDIDS];
1668
1669                 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1670                 if (copy_to_user((int __user *)arg, reqcnt, sizeof(reqcnt)))
1671                         return -EFAULT;
1672                 return 0;
1673         }
1674         /* unknown ioctl number */
1675         default:
1676                 ZCRYPT_DBF_DBG("unknown ioctl 0x%08x\n", cmd);
1677                 return -ENOIOCTLCMD;
1678         }
1679 }
1680
1681 #ifdef CONFIG_COMPAT
1682 /*
1683  * ioctl32 conversion routines
1684  */
1685 struct compat_ica_rsa_modexpo {
1686         compat_uptr_t   inputdata;
1687         unsigned int    inputdatalength;
1688         compat_uptr_t   outputdata;
1689         unsigned int    outputdatalength;
1690         compat_uptr_t   b_key;
1691         compat_uptr_t   n_modulus;
1692 };
1693
1694 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1695                             unsigned int cmd, unsigned long arg)
1696 {
1697         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1698         struct compat_ica_rsa_modexpo mex32;
1699         struct ica_rsa_modexpo mex64;
1700         struct zcrypt_track tr;
1701         long rc;
1702
1703         memset(&tr, 0, sizeof(tr));
1704         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1705                 return -EFAULT;
1706         mex64.inputdata = compat_ptr(mex32.inputdata);
1707         mex64.inputdatalength = mex32.inputdatalength;
1708         mex64.outputdata = compat_ptr(mex32.outputdata);
1709         mex64.outputdatalength = mex32.outputdatalength;
1710         mex64.b_key = compat_ptr(mex32.b_key);
1711         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1712         do {
1713                 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1714                 if (rc == -EAGAIN)
1715                         tr.again_counter++;
1716         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1717         /* on failure: retry once again after a requested rescan */
1718         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1719                 do {
1720                         rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1721                         if (rc == -EAGAIN)
1722                                 tr.again_counter++;
1723                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1724         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1725                 rc = -EIO;
1726         if (rc)
1727                 return rc;
1728         return put_user(mex64.outputdatalength,
1729                         &umex32->outputdatalength);
1730 }
1731
1732 struct compat_ica_rsa_modexpo_crt {
1733         compat_uptr_t   inputdata;
1734         unsigned int    inputdatalength;
1735         compat_uptr_t   outputdata;
1736         unsigned int    outputdatalength;
1737         compat_uptr_t   bp_key;
1738         compat_uptr_t   bq_key;
1739         compat_uptr_t   np_prime;
1740         compat_uptr_t   nq_prime;
1741         compat_uptr_t   u_mult_inv;
1742 };
1743
1744 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1745                                 unsigned int cmd, unsigned long arg)
1746 {
1747         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1748         struct compat_ica_rsa_modexpo_crt crt32;
1749         struct ica_rsa_modexpo_crt crt64;
1750         struct zcrypt_track tr;
1751         long rc;
1752
1753         memset(&tr, 0, sizeof(tr));
1754         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1755                 return -EFAULT;
1756         crt64.inputdata = compat_ptr(crt32.inputdata);
1757         crt64.inputdatalength = crt32.inputdatalength;
1758         crt64.outputdata = compat_ptr(crt32.outputdata);
1759         crt64.outputdatalength = crt32.outputdatalength;
1760         crt64.bp_key = compat_ptr(crt32.bp_key);
1761         crt64.bq_key = compat_ptr(crt32.bq_key);
1762         crt64.np_prime = compat_ptr(crt32.np_prime);
1763         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1764         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1765         do {
1766                 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1767                 if (rc == -EAGAIN)
1768                         tr.again_counter++;
1769         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1770         /* on failure: retry once again after a requested rescan */
1771         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1772                 do {
1773                         rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1774                         if (rc == -EAGAIN)
1775                                 tr.again_counter++;
1776                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1777         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1778                 rc = -EIO;
1779         if (rc)
1780                 return rc;
1781         return put_user(crt64.outputdatalength,
1782                         &ucrt32->outputdatalength);
1783 }
1784
1785 struct compat_ica_xcrb {
1786         unsigned short  agent_ID;
1787         unsigned int    user_defined;
1788         unsigned short  request_ID;
1789         unsigned int    request_control_blk_length;
1790         unsigned char   padding1[16 - sizeof(compat_uptr_t)];
1791         compat_uptr_t   request_control_blk_addr;
1792         unsigned int    request_data_length;
1793         char            padding2[16 - sizeof(compat_uptr_t)];
1794         compat_uptr_t   request_data_address;
1795         unsigned int    reply_control_blk_length;
1796         char            padding3[16 - sizeof(compat_uptr_t)];
1797         compat_uptr_t   reply_control_blk_addr;
1798         unsigned int    reply_data_length;
1799         char            padding4[16 - sizeof(compat_uptr_t)];
1800         compat_uptr_t   reply_data_addr;
1801         unsigned short  priority_window;
1802         unsigned int    status;
1803 } __packed;
1804
1805 static long trans_xcrb32(struct ap_perms *perms, struct file *filp,
1806                          unsigned int cmd, unsigned long arg)
1807 {
1808         struct compat_ica_xcrb __user *uxcrb32 = compat_ptr(arg);
1809         struct compat_ica_xcrb xcrb32;
1810         struct zcrypt_track tr;
1811         struct ica_xcRB xcrb64;
1812         long rc;
1813
1814         memset(&tr, 0, sizeof(tr));
1815         if (copy_from_user(&xcrb32, uxcrb32, sizeof(xcrb32)))
1816                 return -EFAULT;
1817         xcrb64.agent_ID = xcrb32.agent_ID;
1818         xcrb64.user_defined = xcrb32.user_defined;
1819         xcrb64.request_ID = xcrb32.request_ID;
1820         xcrb64.request_control_blk_length =
1821                 xcrb32.request_control_blk_length;
1822         xcrb64.request_control_blk_addr =
1823                 compat_ptr(xcrb32.request_control_blk_addr);
1824         xcrb64.request_data_length =
1825                 xcrb32.request_data_length;
1826         xcrb64.request_data_address =
1827                 compat_ptr(xcrb32.request_data_address);
1828         xcrb64.reply_control_blk_length =
1829                 xcrb32.reply_control_blk_length;
1830         xcrb64.reply_control_blk_addr =
1831                 compat_ptr(xcrb32.reply_control_blk_addr);
1832         xcrb64.reply_data_length = xcrb32.reply_data_length;
1833         xcrb64.reply_data_addr =
1834                 compat_ptr(xcrb32.reply_data_addr);
1835         xcrb64.priority_window = xcrb32.priority_window;
1836         xcrb64.status = xcrb32.status;
1837         do {
1838                 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1839                 if (rc == -EAGAIN)
1840                         tr.again_counter++;
1841         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1842         /* on failure: retry once again after a requested rescan */
1843         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1844                 do {
1845                         rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1846                         if (rc == -EAGAIN)
1847                                 tr.again_counter++;
1848                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1849         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1850                 rc = -EIO;
1851         xcrb32.reply_control_blk_length = xcrb64.reply_control_blk_length;
1852         xcrb32.reply_data_length = xcrb64.reply_data_length;
1853         xcrb32.status = xcrb64.status;
1854         if (copy_to_user(uxcrb32, &xcrb32, sizeof(xcrb32)))
1855                 return -EFAULT;
1856         return rc;
1857 }
1858
1859 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1860                                 unsigned long arg)
1861 {
1862         int rc;
1863         struct ap_perms *perms =
1864                 (struct ap_perms *)filp->private_data;
1865
1866         rc = zcrypt_check_ioctl(perms, cmd);
1867         if (rc)
1868                 return rc;
1869
1870         if (cmd == ICARSAMODEXPO)
1871                 return trans_modexpo32(perms, filp, cmd, arg);
1872         if (cmd == ICARSACRT)
1873                 return trans_modexpo_crt32(perms, filp, cmd, arg);
1874         if (cmd == ZSECSENDCPRB)
1875                 return trans_xcrb32(perms, filp, cmd, arg);
1876         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1877 }
1878 #endif
1879
1880 /*
1881  * Misc device file operations.
1882  */
1883 static const struct file_operations zcrypt_fops = {
1884         .owner          = THIS_MODULE,
1885         .read           = zcrypt_read,
1886         .write          = zcrypt_write,
1887         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1888 #ifdef CONFIG_COMPAT
1889         .compat_ioctl   = zcrypt_compat_ioctl,
1890 #endif
1891         .open           = zcrypt_open,
1892         .release        = zcrypt_release,
1893         .llseek         = no_llseek,
1894 };
1895
1896 /*
1897  * Misc device.
1898  */
1899 static struct miscdevice zcrypt_misc_device = {
1900         .minor      = MISC_DYNAMIC_MINOR,
1901         .name       = "z90crypt",
1902         .fops       = &zcrypt_fops,
1903 };
1904
1905 static int zcrypt_rng_device_count;
1906 static u32 *zcrypt_rng_buffer;
1907 static int zcrypt_rng_buffer_index;
1908 static DEFINE_MUTEX(zcrypt_rng_mutex);
1909
1910 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1911 {
1912         int rc;
1913
1914         /*
1915          * We don't need locking here because the RNG API guarantees serialized
1916          * read method calls.
1917          */
1918         if (zcrypt_rng_buffer_index == 0) {
1919                 rc = zcrypt_rng((char *)zcrypt_rng_buffer);
1920                 /* on failure: retry once again after a requested rescan */
1921                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1922                         rc = zcrypt_rng((char *)zcrypt_rng_buffer);
1923                 if (rc < 0)
1924                         return -EIO;
1925                 zcrypt_rng_buffer_index = rc / sizeof(*data);
1926         }
1927         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1928         return sizeof(*data);
1929 }
1930
1931 static struct hwrng zcrypt_rng_dev = {
1932         .name           = "zcrypt",
1933         .data_read      = zcrypt_rng_data_read,
1934         .quality        = 990,
1935 };
1936
1937 int zcrypt_rng_device_add(void)
1938 {
1939         int rc = 0;
1940
1941         mutex_lock(&zcrypt_rng_mutex);
1942         if (zcrypt_rng_device_count == 0) {
1943                 zcrypt_rng_buffer = (u32 *)get_zeroed_page(GFP_KERNEL);
1944                 if (!zcrypt_rng_buffer) {
1945                         rc = -ENOMEM;
1946                         goto out;
1947                 }
1948                 zcrypt_rng_buffer_index = 0;
1949                 rc = hwrng_register(&zcrypt_rng_dev);
1950                 if (rc)
1951                         goto out_free;
1952                 zcrypt_rng_device_count = 1;
1953         } else {
1954                 zcrypt_rng_device_count++;
1955         }
1956         mutex_unlock(&zcrypt_rng_mutex);
1957         return 0;
1958
1959 out_free:
1960         free_page((unsigned long)zcrypt_rng_buffer);
1961 out:
1962         mutex_unlock(&zcrypt_rng_mutex);
1963         return rc;
1964 }
1965
1966 void zcrypt_rng_device_remove(void)
1967 {
1968         mutex_lock(&zcrypt_rng_mutex);
1969         zcrypt_rng_device_count--;
1970         if (zcrypt_rng_device_count == 0) {
1971                 hwrng_unregister(&zcrypt_rng_dev);
1972                 free_page((unsigned long)zcrypt_rng_buffer);
1973         }
1974         mutex_unlock(&zcrypt_rng_mutex);
1975 }
1976
1977 /*
1978  * Wait until the zcrypt api is operational.
1979  * The AP bus scan and the binding of ap devices to device drivers is
1980  * an asynchronous job. This function waits until these initial jobs
1981  * are done and so the zcrypt api should be ready to serve crypto
1982  * requests - if there are resources available. The function uses an
1983  * internal timeout of 60s. The very first caller will either wait for
1984  * ap bus bindings complete or the timeout happens. This state will be
1985  * remembered for further callers which will only be blocked until a
1986  * decision is made (timeout or bindings complete).
1987  * On timeout -ETIME is returned, on success the return value is 0.
1988  */
1989 int zcrypt_wait_api_operational(void)
1990 {
1991         static DEFINE_MUTEX(zcrypt_wait_api_lock);
1992         static int zcrypt_wait_api_state;
1993         int rc;
1994
1995         rc = mutex_lock_interruptible(&zcrypt_wait_api_lock);
1996         if (rc)
1997                 return rc;
1998
1999         switch (zcrypt_wait_api_state) {
2000         case 0:
2001                 /* initial state, invoke wait for the ap bus complete */
2002                 rc = ap_wait_init_apqn_bindings_complete(
2003                         msecs_to_jiffies(60 * 1000));
2004                 switch (rc) {
2005                 case 0:
2006                         /* ap bus bindings are complete */
2007                         zcrypt_wait_api_state = 1;
2008                         break;
2009                 case -EINTR:
2010                         /* interrupted, go back to caller */
2011                         break;
2012                 case -ETIME:
2013                         /* timeout */
2014                         ZCRYPT_DBF_WARN("%s ap_wait_init_apqn_bindings_complete()=ETIME\n",
2015                                         __func__);
2016                         zcrypt_wait_api_state = -ETIME;
2017                         break;
2018                 default:
2019                         /* other failure */
2020                         ZCRYPT_DBF_DBG("%s ap_wait_init_apqn_bindings_complete()=%d\n",
2021                                        __func__, rc);
2022                         break;
2023                 }
2024                 break;
2025         case 1:
2026                 /* a previous caller already found ap bus bindings complete */
2027                 rc = 0;
2028                 break;
2029         default:
2030                 /* a previous caller had timeout or other failure */
2031                 rc = zcrypt_wait_api_state;
2032                 break;
2033         }
2034
2035         mutex_unlock(&zcrypt_wait_api_lock);
2036
2037         return rc;
2038 }
2039 EXPORT_SYMBOL(zcrypt_wait_api_operational);
2040
2041 int __init zcrypt_debug_init(void)
2042 {
2043         zcrypt_dbf_info = debug_register("zcrypt", 2, 1,
2044                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
2045         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
2046         debug_set_level(zcrypt_dbf_info, DBF_ERR);
2047
2048         return 0;
2049 }
2050
2051 void zcrypt_debug_exit(void)
2052 {
2053         debug_unregister(zcrypt_dbf_info);
2054 }
2055
2056 static int __init zcdn_init(void)
2057 {
2058         int rc;
2059
2060         /* create a new class 'zcrypt' */
2061         zcrypt_class = class_create(ZCRYPT_NAME);
2062         if (IS_ERR(zcrypt_class)) {
2063                 rc = PTR_ERR(zcrypt_class);
2064                 goto out_class_create_failed;
2065         }
2066         zcrypt_class->dev_release = zcdn_device_release;
2067
2068         /* alloc device minor range */
2069         rc = alloc_chrdev_region(&zcrypt_devt,
2070                                  0, ZCRYPT_MAX_MINOR_NODES,
2071                                  ZCRYPT_NAME);
2072         if (rc)
2073                 goto out_alloc_chrdev_failed;
2074
2075         cdev_init(&zcrypt_cdev, &zcrypt_fops);
2076         zcrypt_cdev.owner = THIS_MODULE;
2077         rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2078         if (rc)
2079                 goto out_cdev_add_failed;
2080
2081         /* need some class specific sysfs attributes */
2082         rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
2083         if (rc)
2084                 goto out_class_create_file_1_failed;
2085         rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
2086         if (rc)
2087                 goto out_class_create_file_2_failed;
2088
2089         return 0;
2090
2091 out_class_create_file_2_failed:
2092         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2093 out_class_create_file_1_failed:
2094         cdev_del(&zcrypt_cdev);
2095 out_cdev_add_failed:
2096         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2097 out_alloc_chrdev_failed:
2098         class_destroy(zcrypt_class);
2099 out_class_create_failed:
2100         return rc;
2101 }
2102
2103 static void zcdn_exit(void)
2104 {
2105         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2106         class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
2107         zcdn_destroy_all();
2108         cdev_del(&zcrypt_cdev);
2109         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2110         class_destroy(zcrypt_class);
2111 }
2112
2113 /*
2114  * zcrypt_api_init(): Module initialization.
2115  *
2116  * The module initialization code.
2117  */
2118 int __init zcrypt_api_init(void)
2119 {
2120         int rc;
2121
2122         rc = zcrypt_debug_init();
2123         if (rc)
2124                 goto out;
2125
2126         rc = zcdn_init();
2127         if (rc)
2128                 goto out;
2129
2130         /* Register the request sprayer. */
2131         rc = misc_register(&zcrypt_misc_device);
2132         if (rc < 0)
2133                 goto out_misc_register_failed;
2134
2135         zcrypt_msgtype6_init();
2136         zcrypt_msgtype50_init();
2137
2138         return 0;
2139
2140 out_misc_register_failed:
2141         zcdn_exit();
2142         zcrypt_debug_exit();
2143 out:
2144         return rc;
2145 }
2146
2147 /*
2148  * zcrypt_api_exit(): Module termination.
2149  *
2150  * The module termination code.
2151  */
2152 void __exit zcrypt_api_exit(void)
2153 {
2154         zcdn_exit();
2155         misc_deregister(&zcrypt_misc_device);
2156         zcrypt_msgtype6_exit();
2157         zcrypt_msgtype50_exit();
2158         zcrypt_ccamisc_exit();
2159         zcrypt_ep11misc_exit();
2160         zcrypt_debug_exit();
2161 }
2162
2163 module_init(zcrypt_api_init);
2164 module_exit(zcrypt_api_exit);