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 static int zcrypt_hwrng_seed = 1;
  57 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
  58 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
  59
  60 DEFINE_SPINLOCK(zcrypt_list_lock);
  61 LIST_HEAD(zcrypt_card_list);
  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.device.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.device.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 #ifdef CONFIG_ZCRYPT_DEBUG
 649         if (tr && tr->fi.cmd)
 650                 ap_msg.fi.cmd = tr->fi.cmd;
 651 #endif
 652
 653         if (mex->outputdatalength < mex->inputdatalength) {
 654                 func_code = 0;
 655                 rc = -EINVAL;
 656                 goto out;
 657         }
 658
 659         /*
 660          * As long as outputdatalength is big enough, we can set the
 661          * outputdatalength equal to the inputdatalength, since that is the
 662          * number of bytes we will copy in any case
 663          */
 664         mex->outputdatalength = mex->inputdatalength;
 665
 666         rc = get_rsa_modex_fc(mex, &func_code);
 667         if (rc)
 668                 goto out;
 669
 670         pref_zc = NULL;
 671         pref_zq = NULL;
 672         spin_lock(&zcrypt_list_lock);
 673         for_each_zcrypt_card(zc) {
 674                 /* Check for useable accelarator or CCA card */
 675                 if (!zc->online || !zc->card->config ||
 676                     !(zc->card->functions & 0x18000000))
 677                         continue;
 678                 /* Check for size limits */
 679                 if (zc->min_mod_size > mex->inputdatalength ||
 680                     zc->max_mod_size < mex->inputdatalength)
 681                         continue;
 682                 /* check if device node has admission for this card */
 683                 if (!zcrypt_check_card(perms, zc->card->id))
 684                         continue;
 685                 /* get weight index of the card device  */
 686                 wgt = zc->speed_rating[func_code];
 687                 /* penalty if this msg was previously sent via this card */
 688                 cpen = (tr && tr->again_counter && tr->last_qid &&
 689                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
 690                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
 691                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 692                         continue;
 693                 for_each_zcrypt_queue(zq, zc) {
 694                         /* check if device is useable and eligible */
 695                         if (!zq->online || !zq->ops->rsa_modexpo ||
 696                             !zq->queue->config)
 697                                 continue;
 698                         /* check if device node has admission for this queue */
 699                         if (!zcrypt_check_queue(perms,
 700                                                 AP_QID_QUEUE(zq->queue->qid)))
 701                                 continue;
 702                         /* penalty if the msg was previously sent at this qid */
 703                         qpen = (tr && tr->again_counter && tr->last_qid &&
 704                                 tr->last_qid == zq->queue->qid) ?
 705                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
 706                         if (!zcrypt_queue_compare(zq, pref_zq,
 707                                                   wgt + cpen + qpen, pref_wgt))
 708                                 continue;
 709                         pref_zc = zc;
 710                         pref_zq = zq;
 711                         pref_wgt = wgt + cpen + qpen;
 712                 }
 713         }
 714         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
 715         spin_unlock(&zcrypt_list_lock);
 716
 717         if (!pref_zq) {
 718                 rc = -ENODEV;
 719                 goto out;
 720         }
 721
 722         qid = pref_zq->queue->qid;
 723         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
 724
 725         spin_lock(&zcrypt_list_lock);
 726         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 727         spin_unlock(&zcrypt_list_lock);
 728
 729 out:
 730         ap_release_message(&ap_msg);
 731         if (tr) {
 732                 tr->last_rc = rc;
 733                 tr->last_qid = qid;
 734         }
 735         trace_s390_zcrypt_rep(mex, func_code, rc,
 736                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 737         return rc;
 738 }
 739
 740 static long zcrypt_rsa_crt(struct ap_perms *perms,
 741                            struct zcrypt_track *tr,
 742                            struct ica_rsa_modexpo_crt *crt)
 743 {
 744         struct zcrypt_card *zc, *pref_zc;
 745         struct zcrypt_queue *zq, *pref_zq;
 746         struct ap_message ap_msg;
 747         unsigned int wgt = 0, pref_wgt = 0;
 748         unsigned int func_code;
 749         int cpen, qpen, qid = 0, rc = -ENODEV;
 750         struct module *mod;
 751
 752         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
 753
 754         ap_init_message(&ap_msg);
 755
 756 #ifdef CONFIG_ZCRYPT_DEBUG
 757         if (tr && tr->fi.cmd)
 758                 ap_msg.fi.cmd = tr->fi.cmd;
 759 #endif
 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 useable accelarator or CCA card */
 783                 if (!zc->online || !zc->card->config ||
 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 useable and eligible */
 803                         if (!zq->online || !zq->ops->rsa_modexpo_crt ||
 804                             !zq->queue->config)
 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                 rc = -ENODEV;
 827                 goto out;
 828         }
 829
 830         qid = pref_zq->queue->qid;
 831         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
 832
 833         spin_lock(&zcrypt_list_lock);
 834         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 835         spin_unlock(&zcrypt_list_lock);
 836
 837 out:
 838         ap_release_message(&ap_msg);
 839         if (tr) {
 840                 tr->last_rc = rc;
 841                 tr->last_qid = qid;
 842         }
 843         trace_s390_zcrypt_rep(crt, func_code, rc,
 844                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 845         return rc;
 846 }
 847
 848 static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
 849                               struct zcrypt_track *tr,
 850                               struct ica_xcRB *xcRB)
 851 {
 852         struct zcrypt_card *zc, *pref_zc;
 853         struct zcrypt_queue *zq, *pref_zq;
 854         struct ap_message ap_msg;
 855         unsigned int wgt = 0, pref_wgt = 0;
 856         unsigned int func_code;
 857         unsigned short *domain, tdom;
 858         int cpen, qpen, qid = 0, rc = -ENODEV;
 859         struct module *mod;
 860
 861         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
 862
 863         xcRB->status = 0;
 864         ap_init_message(&ap_msg);
 865
 866 #ifdef CONFIG_ZCRYPT_DEBUG
 867         if (tr && tr->fi.cmd)
 868                 ap_msg.fi.cmd = tr->fi.cmd;
 869         if (tr && tr->fi.action == AP_FI_ACTION_CCA_AGENT_FF) {
 870                 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid agent_ID 'FF'\n",
 871                                 __func__, tr->fi.cmd);
 872                 xcRB->agent_ID = 0x4646;
 873         }
 874 #endif
 875
 876         rc = get_cprb_fc(userspace, xcRB, &ap_msg, &func_code, &domain);
 877         if (rc)
 878                 goto out;
 879
 880         /*
 881          * If a valid target domain is set and this domain is NOT a usage
 882          * domain but a control only domain, use the default domain as target.
 883          */
 884         tdom = *domain;
 885         if (tdom < AP_DOMAINS &&
 886             !ap_test_config_usage_domain(tdom) &&
 887             ap_test_config_ctrl_domain(tdom) &&
 888             ap_domain_index >= 0)
 889                 tdom = ap_domain_index;
 890
 891         pref_zc = NULL;
 892         pref_zq = NULL;
 893         spin_lock(&zcrypt_list_lock);
 894         for_each_zcrypt_card(zc) {
 895                 /* Check for useable CCA card */
 896                 if (!zc->online || !zc->card->config ||
 897                     !(zc->card->functions & 0x10000000))
 898                         continue;
 899                 /* Check for user selected CCA card */
 900                 if (xcRB->user_defined != AUTOSELECT &&
 901                     xcRB->user_defined != zc->card->id)
 902                         continue;
 903                 /* check if request size exceeds card max msg size */
 904                 if (ap_msg.len > zc->card->maxmsgsize)
 905                         continue;
 906                 /* check if device node has admission for this card */
 907                 if (!zcrypt_check_card(perms, zc->card->id))
 908                         continue;
 909                 /* get weight index of the card device  */
 910                 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 911                 /* penalty if this msg was previously sent via this card */
 912                 cpen = (tr && tr->again_counter && tr->last_qid &&
 913                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
 914                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
 915                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 916                         continue;
 917                 for_each_zcrypt_queue(zq, zc) {
 918                         /* check for device useable and eligible */
 919                         if (!zq->online ||
 920                             !zq->ops->send_cprb ||
 921                             !zq->queue->config ||
 922                             (tdom != AUTOSEL_DOM &&
 923                              tdom != AP_QID_QUEUE(zq->queue->qid)))
 924                                 continue;
 925                         /* check if device node has admission for this queue */
 926                         if (!zcrypt_check_queue(perms,
 927                                                 AP_QID_QUEUE(zq->queue->qid)))
 928                                 continue;
 929                         /* penalty if the msg was previously sent at this qid */
 930                         qpen = (tr && tr->again_counter && tr->last_qid &&
 931                                 tr->last_qid == zq->queue->qid) ?
 932                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
 933                         if (!zcrypt_queue_compare(zq, pref_zq,
 934                                                   wgt + cpen + qpen, pref_wgt))
 935                                 continue;
 936                         pref_zc = zc;
 937                         pref_zq = zq;
 938                         pref_wgt = wgt + cpen + qpen;
 939                 }
 940         }
 941         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
 942         spin_unlock(&zcrypt_list_lock);
 943
 944         if (!pref_zq) {
 945                 rc = -ENODEV;
 946                 goto out;
 947         }
 948
 949         /* in case of auto select, provide the correct domain */
 950         qid = pref_zq->queue->qid;
 951         if (*domain == AUTOSEL_DOM)
 952                 *domain = AP_QID_QUEUE(qid);
 953
 954 #ifdef CONFIG_ZCRYPT_DEBUG
 955         if (tr && tr->fi.action == AP_FI_ACTION_CCA_DOM_INVAL) {
 956                 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid domain\n",
 957                                 __func__, tr->fi.cmd);
 958                 *domain = 99;
 959         }
 960 #endif
 961
 962         rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcRB, &ap_msg);
 963
 964         spin_lock(&zcrypt_list_lock);
 965         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 966         spin_unlock(&zcrypt_list_lock);
 967
 968 out:
 969         ap_release_message(&ap_msg);
 970         if (tr) {
 971                 tr->last_rc = rc;
 972                 tr->last_qid = qid;
 973         }
 974         trace_s390_zcrypt_rep(xcRB, func_code, rc,
 975                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 976         return rc;
 977 }
 978
 979 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
 980 {
 981         return _zcrypt_send_cprb(false, &ap_perms, NULL, xcRB);
 982 }
 983 EXPORT_SYMBOL(zcrypt_send_cprb);
 984
 985 static bool is_desired_ep11_card(unsigned int dev_id,
 986                                  unsigned short target_num,
 987                                  struct ep11_target_dev *targets)
 988 {
 989         while (target_num-- > 0) {
 990                 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
 991                         return true;
 992                 targets++;
 993         }
 994         return false;
 995 }
 996
 997 static bool is_desired_ep11_queue(unsigned int dev_qid,
 998                                   unsigned short target_num,
 999                                   struct ep11_target_dev *targets)
1000 {
1001         int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
1002
1003         while (target_num-- > 0) {
1004                 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
1005                     (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
1006                         return true;
1007                 targets++;
1008         }
1009         return false;
1010 }
1011
1012 static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
1013                                    struct zcrypt_track *tr,
1014                                    struct ep11_urb *xcrb)
1015 {
1016         struct zcrypt_card *zc, *pref_zc;
1017         struct zcrypt_queue *zq, *pref_zq;
1018         struct ep11_target_dev *targets;
1019         unsigned short target_num;
1020         unsigned int wgt = 0, pref_wgt = 0;
1021         unsigned int func_code;
1022         struct ap_message ap_msg;
1023         int cpen, qpen, qid = 0, rc = -ENODEV;
1024         struct module *mod;
1025
1026         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
1027
1028         ap_init_message(&ap_msg);
1029
1030 #ifdef CONFIG_ZCRYPT_DEBUG
1031         if (tr && tr->fi.cmd)
1032                 ap_msg.fi.cmd = tr->fi.cmd;
1033 #endif
1034
1035         target_num = (unsigned short) xcrb->targets_num;
1036
1037         /* empty list indicates autoselect (all available targets) */
1038         targets = NULL;
1039         if (target_num != 0) {
1040                 struct ep11_target_dev __user *uptr;
1041
1042                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
1043                 if (!targets) {
1044                         func_code = 0;
1045                         rc = -ENOMEM;
1046                         goto out;
1047                 }
1048
1049                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
1050                 if (z_copy_from_user(userspace, targets, uptr,
1051                                    target_num * sizeof(*targets))) {
1052                         func_code = 0;
1053                         rc = -EFAULT;
1054                         goto out_free;
1055                 }
1056         }
1057
1058         rc = get_ep11cprb_fc(userspace, xcrb, &ap_msg, &func_code);
1059         if (rc)
1060                 goto out_free;
1061
1062         pref_zc = NULL;
1063         pref_zq = NULL;
1064         spin_lock(&zcrypt_list_lock);
1065         for_each_zcrypt_card(zc) {
1066                 /* Check for useable EP11 card */
1067                 if (!zc->online || !zc->card->config ||
1068                     !(zc->card->functions & 0x04000000))
1069                         continue;
1070                 /* Check for user selected EP11 card */
1071                 if (targets &&
1072                     !is_desired_ep11_card(zc->card->id, target_num, targets))
1073                         continue;
1074                 /* check if request size exceeds card max msg size */
1075                 if (ap_msg.len > zc->card->maxmsgsize)
1076                         continue;
1077                 /* check if device node has admission for this card */
1078                 if (!zcrypt_check_card(perms, zc->card->id))
1079                         continue;
1080                 /* get weight index of the card device  */
1081                 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1082                 /* penalty if this msg was previously sent via this card */
1083                 cpen = (tr && tr->again_counter && tr->last_qid &&
1084                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
1085                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
1086                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
1087                         continue;
1088                 for_each_zcrypt_queue(zq, zc) {
1089                         /* check if device is useable and eligible */
1090                         if (!zq->online ||
1091                             !zq->ops->send_ep11_cprb ||
1092                             !zq->queue->config ||
1093                             (targets &&
1094                              !is_desired_ep11_queue(zq->queue->qid,
1095                                                     target_num, targets)))
1096                                 continue;
1097                         /* check if device node has admission for this queue */
1098                         if (!zcrypt_check_queue(perms,
1099                                                 AP_QID_QUEUE(zq->queue->qid)))
1100                                 continue;
1101                         /* penalty if the msg was previously sent at this qid */
1102                         qpen = (tr && tr->again_counter && tr->last_qid &&
1103                                 tr->last_qid == zq->queue->qid) ?
1104                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
1105                         if (!zcrypt_queue_compare(zq, pref_zq,
1106                                                   wgt + cpen + qpen, pref_wgt))
1107                                 continue;
1108                         pref_zc = zc;
1109                         pref_zq = zq;
1110                         pref_wgt = wgt + cpen + qpen;
1111                 }
1112         }
1113         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1114         spin_unlock(&zcrypt_list_lock);
1115
1116         if (!pref_zq) {
1117                 rc = -ENODEV;
1118                 goto out_free;
1119         }
1120
1121         qid = pref_zq->queue->qid;
1122         rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
1123
1124         spin_lock(&zcrypt_list_lock);
1125         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1126         spin_unlock(&zcrypt_list_lock);
1127
1128 out_free:
1129         kfree(targets);
1130 out:
1131         ap_release_message(&ap_msg);
1132         if (tr) {
1133                 tr->last_rc = rc;
1134                 tr->last_qid = qid;
1135         }
1136         trace_s390_zcrypt_rep(xcrb, func_code, rc,
1137                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1138         return rc;
1139 }
1140
1141 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1142 {
1143         return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb);
1144 }
1145 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1146
1147 static long zcrypt_rng(char *buffer)
1148 {
1149         struct zcrypt_card *zc, *pref_zc;
1150         struct zcrypt_queue *zq, *pref_zq;
1151         unsigned int wgt = 0, pref_wgt = 0;
1152         unsigned int func_code;
1153         struct ap_message ap_msg;
1154         unsigned int domain;
1155         int qid = 0, rc = -ENODEV;
1156         struct module *mod;
1157
1158         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1159
1160         ap_init_message(&ap_msg);
1161         rc = get_rng_fc(&ap_msg, &func_code, &domain);
1162         if (rc)
1163                 goto out;
1164
1165         pref_zc = NULL;
1166         pref_zq = NULL;
1167         spin_lock(&zcrypt_list_lock);
1168         for_each_zcrypt_card(zc) {
1169                 /* Check for useable CCA card */
1170                 if (!zc->online || !zc->card->config ||
1171                     !(zc->card->functions & 0x10000000))
1172                         continue;
1173                 /* get weight index of the card device  */
1174                 wgt = zc->speed_rating[func_code];
1175                 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
1176                         continue;
1177                 for_each_zcrypt_queue(zq, zc) {
1178                         /* check if device is useable and eligible */
1179                         if (!zq->online || !zq->ops->rng ||
1180                             !zq->queue->config)
1181                                 continue;
1182                         if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
1183                                 continue;
1184                         pref_zc = zc;
1185                         pref_zq = zq;
1186                         pref_wgt = wgt;
1187                 }
1188         }
1189         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1190         spin_unlock(&zcrypt_list_lock);
1191
1192         if (!pref_zq) {
1193                 rc = -ENODEV;
1194                 goto out;
1195         }
1196
1197         qid = pref_zq->queue->qid;
1198         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1199
1200         spin_lock(&zcrypt_list_lock);
1201         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1202         spin_unlock(&zcrypt_list_lock);
1203
1204 out:
1205         ap_release_message(&ap_msg);
1206         trace_s390_zcrypt_rep(buffer, func_code, rc,
1207                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1208         return rc;
1209 }
1210
1211 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1212 {
1213         struct zcrypt_card *zc;
1214         struct zcrypt_queue *zq;
1215         struct zcrypt_device_status *stat;
1216         int card, queue;
1217
1218         memset(devstatus, 0, MAX_ZDEV_ENTRIES
1219                * sizeof(struct zcrypt_device_status));
1220
1221         spin_lock(&zcrypt_list_lock);
1222         for_each_zcrypt_card(zc) {
1223                 for_each_zcrypt_queue(zq, zc) {
1224                         card = AP_QID_CARD(zq->queue->qid);
1225                         if (card >= MAX_ZDEV_CARDIDS)
1226                                 continue;
1227                         queue = AP_QID_QUEUE(zq->queue->qid);
1228                         stat = &devstatus[card * AP_DOMAINS + queue];
1229                         stat->hwtype = zc->card->ap_dev.device_type;
1230                         stat->functions = zc->card->functions >> 26;
1231                         stat->qid = zq->queue->qid;
1232                         stat->online = zq->online ? 0x01 : 0x00;
1233                 }
1234         }
1235         spin_unlock(&zcrypt_list_lock);
1236 }
1237
1238 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1239 {
1240         struct zcrypt_card *zc;
1241         struct zcrypt_queue *zq;
1242         struct zcrypt_device_status_ext *stat;
1243         int card, queue;
1244
1245         memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1246                * sizeof(struct zcrypt_device_status_ext));
1247
1248         spin_lock(&zcrypt_list_lock);
1249         for_each_zcrypt_card(zc) {
1250                 for_each_zcrypt_queue(zq, zc) {
1251                         card = AP_QID_CARD(zq->queue->qid);
1252                         queue = AP_QID_QUEUE(zq->queue->qid);
1253                         stat = &devstatus[card * AP_DOMAINS + queue];
1254                         stat->hwtype = zc->card->ap_dev.device_type;
1255                         stat->functions = zc->card->functions >> 26;
1256                         stat->qid = zq->queue->qid;
1257                         stat->online = zq->online ? 0x01 : 0x00;
1258                 }
1259         }
1260         spin_unlock(&zcrypt_list_lock);
1261 }
1262 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1263
1264 int zcrypt_device_status_ext(int card, int queue,
1265                              struct zcrypt_device_status_ext *devstat)
1266 {
1267         struct zcrypt_card *zc;
1268         struct zcrypt_queue *zq;
1269
1270         memset(devstat, 0, sizeof(*devstat));
1271
1272         spin_lock(&zcrypt_list_lock);
1273         for_each_zcrypt_card(zc) {
1274                 for_each_zcrypt_queue(zq, zc) {
1275                         if (card == AP_QID_CARD(zq->queue->qid) &&
1276                             queue == AP_QID_QUEUE(zq->queue->qid)) {
1277                                 devstat->hwtype = zc->card->ap_dev.device_type;
1278                                 devstat->functions = zc->card->functions >> 26;
1279                                 devstat->qid = zq->queue->qid;
1280                                 devstat->online = zq->online ? 0x01 : 0x00;
1281                                 spin_unlock(&zcrypt_list_lock);
1282                                 return 0;
1283                         }
1284                 }
1285         }
1286         spin_unlock(&zcrypt_list_lock);
1287
1288         return -ENODEV;
1289 }
1290 EXPORT_SYMBOL(zcrypt_device_status_ext);
1291
1292 static void zcrypt_status_mask(char status[], size_t max_adapters)
1293 {
1294         struct zcrypt_card *zc;
1295         struct zcrypt_queue *zq;
1296         int card;
1297
1298         memset(status, 0, max_adapters);
1299         spin_lock(&zcrypt_list_lock);
1300         for_each_zcrypt_card(zc) {
1301                 for_each_zcrypt_queue(zq, zc) {
1302                         card = AP_QID_CARD(zq->queue->qid);
1303                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1304                             || card >= max_adapters)
1305                                 continue;
1306                         status[card] = zc->online ? zc->user_space_type : 0x0d;
1307                 }
1308         }
1309         spin_unlock(&zcrypt_list_lock);
1310 }
1311
1312 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1313 {
1314         struct zcrypt_card *zc;
1315         struct zcrypt_queue *zq;
1316         int card;
1317
1318         memset(qdepth, 0, max_adapters);
1319         spin_lock(&zcrypt_list_lock);
1320         local_bh_disable();
1321         for_each_zcrypt_card(zc) {
1322                 for_each_zcrypt_queue(zq, zc) {
1323                         card = AP_QID_CARD(zq->queue->qid);
1324                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1325                             || card >= max_adapters)
1326                                 continue;
1327                         spin_lock(&zq->queue->lock);
1328                         qdepth[card] =
1329                                 zq->queue->pendingq_count +
1330                                 zq->queue->requestq_count;
1331                         spin_unlock(&zq->queue->lock);
1332                 }
1333         }
1334         local_bh_enable();
1335         spin_unlock(&zcrypt_list_lock);
1336 }
1337
1338 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1339 {
1340         struct zcrypt_card *zc;
1341         struct zcrypt_queue *zq;
1342         int card;
1343         u64 cnt;
1344
1345         memset(reqcnt, 0, sizeof(int) * max_adapters);
1346         spin_lock(&zcrypt_list_lock);
1347         local_bh_disable();
1348         for_each_zcrypt_card(zc) {
1349                 for_each_zcrypt_queue(zq, zc) {
1350                         card = AP_QID_CARD(zq->queue->qid);
1351                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1352                             || card >= max_adapters)
1353                                 continue;
1354                         spin_lock(&zq->queue->lock);
1355                         cnt = zq->queue->total_request_count;
1356                         spin_unlock(&zq->queue->lock);
1357                         reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX;
1358                 }
1359         }
1360         local_bh_enable();
1361         spin_unlock(&zcrypt_list_lock);
1362 }
1363
1364 static int zcrypt_pendingq_count(void)
1365 {
1366         struct zcrypt_card *zc;
1367         struct zcrypt_queue *zq;
1368         int pendingq_count;
1369
1370         pendingq_count = 0;
1371         spin_lock(&zcrypt_list_lock);
1372         local_bh_disable();
1373         for_each_zcrypt_card(zc) {
1374                 for_each_zcrypt_queue(zq, zc) {
1375                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1376                                 continue;
1377                         spin_lock(&zq->queue->lock);
1378                         pendingq_count += zq->queue->pendingq_count;
1379                         spin_unlock(&zq->queue->lock);
1380                 }
1381         }
1382         local_bh_enable();
1383         spin_unlock(&zcrypt_list_lock);
1384         return pendingq_count;
1385 }
1386
1387 static int zcrypt_requestq_count(void)
1388 {
1389         struct zcrypt_card *zc;
1390         struct zcrypt_queue *zq;
1391         int requestq_count;
1392
1393         requestq_count = 0;
1394         spin_lock(&zcrypt_list_lock);
1395         local_bh_disable();
1396         for_each_zcrypt_card(zc) {
1397                 for_each_zcrypt_queue(zq, zc) {
1398                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1399                                 continue;
1400                         spin_lock(&zq->queue->lock);
1401                         requestq_count += zq->queue->requestq_count;
1402                         spin_unlock(&zq->queue->lock);
1403                 }
1404         }
1405         local_bh_enable();
1406         spin_unlock(&zcrypt_list_lock);
1407         return requestq_count;
1408 }
1409
1410 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1411 {
1412         int rc;
1413         struct zcrypt_track tr;
1414         struct ica_rsa_modexpo mex;
1415         struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1416
1417         memset(&tr, 0, sizeof(tr));
1418         if (copy_from_user(&mex, umex, sizeof(mex)))
1419                 return -EFAULT;
1420
1421 #ifdef CONFIG_ZCRYPT_DEBUG
1422         if (mex.inputdatalength & (1U << 31)) {
1423                 if (!capable(CAP_SYS_ADMIN))
1424                         return -EPERM;
1425                 tr.fi.cmd = (u16)(mex.inputdatalength >> 16);
1426         }
1427         mex.inputdatalength &= 0x0000FFFF;
1428 #endif
1429
1430         do {
1431                 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1432                 if (rc == -EAGAIN)
1433                         tr.again_counter++;
1434 #ifdef CONFIG_ZCRYPT_DEBUG
1435                 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1436                         break;
1437 #endif
1438         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1439         /* on failure: retry once again after a requested rescan */
1440         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1441                 do {
1442                         rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1443                         if (rc == -EAGAIN)
1444                                 tr.again_counter++;
1445                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1446         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1447                 rc = -EIO;
1448         if (rc) {
1449                 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1450                 return rc;
1451         }
1452         return put_user(mex.outputdatalength, &umex->outputdatalength);
1453 }
1454
1455 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1456 {
1457         int rc;
1458         struct zcrypt_track tr;
1459         struct ica_rsa_modexpo_crt crt;
1460         struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1461
1462         memset(&tr, 0, sizeof(tr));
1463         if (copy_from_user(&crt, ucrt, sizeof(crt)))
1464                 return -EFAULT;
1465
1466 #ifdef CONFIG_ZCRYPT_DEBUG
1467         if (crt.inputdatalength & (1U << 31)) {
1468                 if (!capable(CAP_SYS_ADMIN))
1469                         return -EPERM;
1470                 tr.fi.cmd = (u16)(crt.inputdatalength >> 16);
1471         }
1472         crt.inputdatalength &= 0x0000FFFF;
1473 #endif
1474
1475         do {
1476                 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1477                 if (rc == -EAGAIN)
1478                         tr.again_counter++;
1479 #ifdef CONFIG_ZCRYPT_DEBUG
1480                 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1481                         break;
1482 #endif
1483         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1484         /* on failure: retry once again after a requested rescan */
1485         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1486                 do {
1487                         rc = zcrypt_rsa_crt(perms, &tr, &crt);
1488                         if (rc == -EAGAIN)
1489                                 tr.again_counter++;
1490                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1491         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1492                 rc = -EIO;
1493         if (rc) {
1494                 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1495                 return rc;
1496         }
1497         return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1498 }
1499
1500 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1501 {
1502         int rc;
1503         struct ica_xcRB xcRB;
1504         struct zcrypt_track tr;
1505         struct ica_xcRB __user *uxcRB = (void __user *) arg;
1506
1507         memset(&tr, 0, sizeof(tr));
1508         if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1509                 return -EFAULT;
1510
1511 #ifdef CONFIG_ZCRYPT_DEBUG
1512         if (xcRB.status & (1U << 31)) {
1513                 if (!capable(CAP_SYS_ADMIN))
1514                         return -EPERM;
1515                 tr.fi.cmd = (u16)(xcRB.status >> 16);
1516         }
1517         xcRB.status &= 0x0000FFFF;
1518 #endif
1519
1520         do {
1521                 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
1522                 if (rc == -EAGAIN)
1523                         tr.again_counter++;
1524 #ifdef CONFIG_ZCRYPT_DEBUG
1525                 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1526                         break;
1527 #endif
1528         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1529         /* on failure: retry once again after a requested rescan */
1530         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1531                 do {
1532                         rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
1533                         if (rc == -EAGAIN)
1534                                 tr.again_counter++;
1535                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1536         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1537                 rc = -EIO;
1538         if (rc)
1539                 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1540                            rc, xcRB.status);
1541         if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1542                 return -EFAULT;
1543         return rc;
1544 }
1545
1546 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1547 {
1548         int rc;
1549         struct ep11_urb xcrb;
1550         struct zcrypt_track tr;
1551         struct ep11_urb __user *uxcrb = (void __user *)arg;
1552
1553         memset(&tr, 0, sizeof(tr));
1554         if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1555                 return -EFAULT;
1556
1557 #ifdef CONFIG_ZCRYPT_DEBUG
1558         if (xcrb.req_len & (1ULL << 63)) {
1559                 if (!capable(CAP_SYS_ADMIN))
1560                         return -EPERM;
1561                 tr.fi.cmd = (u16)(xcrb.req_len >> 48);
1562         }
1563         xcrb.req_len &= 0x0000FFFFFFFFFFFFULL;
1564 #endif
1565
1566         do {
1567                 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1568                 if (rc == -EAGAIN)
1569                         tr.again_counter++;
1570 #ifdef CONFIG_ZCRYPT_DEBUG
1571                 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1572                         break;
1573 #endif
1574         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1575         /* on failure: retry once again after a requested rescan */
1576         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1577                 do {
1578                         rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1579                         if (rc == -EAGAIN)
1580                                 tr.again_counter++;
1581                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1582         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1583                 rc = -EIO;
1584         if (rc)
1585                 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1586         if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1587                 return -EFAULT;
1588         return rc;
1589 }
1590
1591 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1592                                   unsigned long arg)
1593 {
1594         int rc;
1595         struct ap_perms *perms =
1596                 (struct ap_perms *) filp->private_data;
1597
1598         rc = zcrypt_check_ioctl(perms, cmd);
1599         if (rc)
1600                 return rc;
1601
1602         switch (cmd) {
1603         case ICARSAMODEXPO:
1604                 return icarsamodexpo_ioctl(perms, arg);
1605         case ICARSACRT:
1606                 return icarsacrt_ioctl(perms, arg);
1607         case ZSECSENDCPRB:
1608                 return zsecsendcprb_ioctl(perms, arg);
1609         case ZSENDEP11CPRB:
1610                 return zsendep11cprb_ioctl(perms, arg);
1611         case ZCRYPT_DEVICE_STATUS: {
1612                 struct zcrypt_device_status_ext *device_status;
1613                 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1614                         * sizeof(struct zcrypt_device_status_ext);
1615
1616                 device_status = kzalloc(total_size, GFP_KERNEL);
1617                 if (!device_status)
1618                         return -ENOMEM;
1619                 zcrypt_device_status_mask_ext(device_status);
1620                 if (copy_to_user((char __user *) arg, device_status,
1621                                  total_size))
1622                         rc = -EFAULT;
1623                 kfree(device_status);
1624                 return rc;
1625         }
1626         case ZCRYPT_STATUS_MASK: {
1627                 char status[AP_DEVICES];
1628
1629                 zcrypt_status_mask(status, AP_DEVICES);
1630                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1631                         return -EFAULT;
1632                 return 0;
1633         }
1634         case ZCRYPT_QDEPTH_MASK: {
1635                 char qdepth[AP_DEVICES];
1636
1637                 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1638                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1639                         return -EFAULT;
1640                 return 0;
1641         }
1642         case ZCRYPT_PERDEV_REQCNT: {
1643                 u32 *reqcnt;
1644
1645                 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1646                 if (!reqcnt)
1647                         return -ENOMEM;
1648                 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1649                 if (copy_to_user((int __user *) arg, reqcnt,
1650                                  sizeof(u32) * AP_DEVICES))
1651                         rc = -EFAULT;
1652                 kfree(reqcnt);
1653                 return rc;
1654         }
1655         case Z90STAT_REQUESTQ_COUNT:
1656                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1657         case Z90STAT_PENDINGQ_COUNT:
1658                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1659         case Z90STAT_TOTALOPEN_COUNT:
1660                 return put_user(atomic_read(&zcrypt_open_count),
1661                                 (int __user *) arg);
1662         case Z90STAT_DOMAIN_INDEX:
1663                 return put_user(ap_domain_index, (int __user *) arg);
1664         /*
1665          * Deprecated ioctls
1666          */
1667         case ZDEVICESTATUS: {
1668                 /* the old ioctl supports only 64 adapters */
1669                 struct zcrypt_device_status *device_status;
1670                 size_t total_size = MAX_ZDEV_ENTRIES
1671                         * sizeof(struct zcrypt_device_status);
1672
1673                 device_status = kzalloc(total_size, GFP_KERNEL);
1674                 if (!device_status)
1675                         return -ENOMEM;
1676                 zcrypt_device_status_mask(device_status);
1677                 if (copy_to_user((char __user *) arg, device_status,
1678                                  total_size))
1679                         rc = -EFAULT;
1680                 kfree(device_status);
1681                 return rc;
1682         }
1683         case Z90STAT_STATUS_MASK: {
1684                 /* the old ioctl supports only 64 adapters */
1685                 char status[MAX_ZDEV_CARDIDS];
1686
1687                 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1688                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1689                         return -EFAULT;
1690                 return 0;
1691         }
1692         case Z90STAT_QDEPTH_MASK: {
1693                 /* the old ioctl supports only 64 adapters */
1694                 char qdepth[MAX_ZDEV_CARDIDS];
1695
1696                 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1697                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1698                         return -EFAULT;
1699                 return 0;
1700         }
1701         case Z90STAT_PERDEV_REQCNT: {
1702                 /* the old ioctl supports only 64 adapters */
1703                 u32 reqcnt[MAX_ZDEV_CARDIDS];
1704
1705                 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1706                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1707                         return -EFAULT;
1708                 return 0;
1709         }
1710         /* unknown ioctl number */
1711         default:
1712                 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1713                 return -ENOIOCTLCMD;
1714         }
1715 }
1716
1717 #ifdef CONFIG_COMPAT
1718 /*
1719  * ioctl32 conversion routines
1720  */
1721 struct compat_ica_rsa_modexpo {
1722         compat_uptr_t   inputdata;
1723         unsigned int    inputdatalength;
1724         compat_uptr_t   outputdata;
1725         unsigned int    outputdatalength;
1726         compat_uptr_t   b_key;
1727         compat_uptr_t   n_modulus;
1728 };
1729
1730 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1731                             unsigned int cmd, unsigned long arg)
1732 {
1733         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1734         struct compat_ica_rsa_modexpo mex32;
1735         struct ica_rsa_modexpo mex64;
1736         struct zcrypt_track tr;
1737         long rc;
1738
1739         memset(&tr, 0, sizeof(tr));
1740         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1741                 return -EFAULT;
1742         mex64.inputdata = compat_ptr(mex32.inputdata);
1743         mex64.inputdatalength = mex32.inputdatalength;
1744         mex64.outputdata = compat_ptr(mex32.outputdata);
1745         mex64.outputdatalength = mex32.outputdatalength;
1746         mex64.b_key = compat_ptr(mex32.b_key);
1747         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1748         do {
1749                 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1750                 if (rc == -EAGAIN)
1751                         tr.again_counter++;
1752         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1753         /* on failure: retry once again after a requested rescan */
1754         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1755                 do {
1756                         rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1757                         if (rc == -EAGAIN)
1758                                 tr.again_counter++;
1759                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1760         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1761                 rc = -EIO;
1762         if (rc)
1763                 return rc;
1764         return put_user(mex64.outputdatalength,
1765                         &umex32->outputdatalength);
1766 }
1767
1768 struct compat_ica_rsa_modexpo_crt {
1769         compat_uptr_t   inputdata;
1770         unsigned int    inputdatalength;
1771         compat_uptr_t   outputdata;
1772         unsigned int    outputdatalength;
1773         compat_uptr_t   bp_key;
1774         compat_uptr_t   bq_key;
1775         compat_uptr_t   np_prime;
1776         compat_uptr_t   nq_prime;
1777         compat_uptr_t   u_mult_inv;
1778 };
1779
1780 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1781                                 unsigned int cmd, unsigned long arg)
1782 {
1783         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1784         struct compat_ica_rsa_modexpo_crt crt32;
1785         struct ica_rsa_modexpo_crt crt64;
1786         struct zcrypt_track tr;
1787         long rc;
1788
1789         memset(&tr, 0, sizeof(tr));
1790         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1791                 return -EFAULT;
1792         crt64.inputdata = compat_ptr(crt32.inputdata);
1793         crt64.inputdatalength = crt32.inputdatalength;
1794         crt64.outputdata = compat_ptr(crt32.outputdata);
1795         crt64.outputdatalength = crt32.outputdatalength;
1796         crt64.bp_key = compat_ptr(crt32.bp_key);
1797         crt64.bq_key = compat_ptr(crt32.bq_key);
1798         crt64.np_prime = compat_ptr(crt32.np_prime);
1799         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1800         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1801         do {
1802                 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1803                 if (rc == -EAGAIN)
1804                         tr.again_counter++;
1805         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1806         /* on failure: retry once again after a requested rescan */
1807         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1808                 do {
1809                         rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1810                         if (rc == -EAGAIN)
1811                                 tr.again_counter++;
1812                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1813         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1814                 rc = -EIO;
1815         if (rc)
1816                 return rc;
1817         return put_user(crt64.outputdatalength,
1818                         &ucrt32->outputdatalength);
1819 }
1820
1821 struct compat_ica_xcRB {
1822         unsigned short  agent_ID;
1823         unsigned int    user_defined;
1824         unsigned short  request_ID;
1825         unsigned int    request_control_blk_length;
1826         unsigned char   padding1[16 - sizeof(compat_uptr_t)];
1827         compat_uptr_t   request_control_blk_addr;
1828         unsigned int    request_data_length;
1829         char            padding2[16 - sizeof(compat_uptr_t)];
1830         compat_uptr_t   request_data_address;
1831         unsigned int    reply_control_blk_length;
1832         char            padding3[16 - sizeof(compat_uptr_t)];
1833         compat_uptr_t   reply_control_blk_addr;
1834         unsigned int    reply_data_length;
1835         char            padding4[16 - sizeof(compat_uptr_t)];
1836         compat_uptr_t   reply_data_addr;
1837         unsigned short  priority_window;
1838         unsigned int    status;
1839 } __packed;
1840
1841 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1842                          unsigned int cmd, unsigned long arg)
1843 {
1844         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1845         struct compat_ica_xcRB xcRB32;
1846         struct zcrypt_track tr;
1847         struct ica_xcRB xcRB64;
1848         long rc;
1849
1850         memset(&tr, 0, sizeof(tr));
1851         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1852                 return -EFAULT;
1853         xcRB64.agent_ID = xcRB32.agent_ID;
1854         xcRB64.user_defined = xcRB32.user_defined;
1855         xcRB64.request_ID = xcRB32.request_ID;
1856         xcRB64.request_control_blk_length =
1857                 xcRB32.request_control_blk_length;
1858         xcRB64.request_control_blk_addr =
1859                 compat_ptr(xcRB32.request_control_blk_addr);
1860         xcRB64.request_data_length =
1861                 xcRB32.request_data_length;
1862         xcRB64.request_data_address =
1863                 compat_ptr(xcRB32.request_data_address);
1864         xcRB64.reply_control_blk_length =
1865                 xcRB32.reply_control_blk_length;
1866         xcRB64.reply_control_blk_addr =
1867                 compat_ptr(xcRB32.reply_control_blk_addr);
1868         xcRB64.reply_data_length = xcRB32.reply_data_length;
1869         xcRB64.reply_data_addr =
1870                 compat_ptr(xcRB32.reply_data_addr);
1871         xcRB64.priority_window = xcRB32.priority_window;
1872         xcRB64.status = xcRB32.status;
1873         do {
1874                 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
1875                 if (rc == -EAGAIN)
1876                         tr.again_counter++;
1877         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1878         /* on failure: retry once again after a requested rescan */
1879         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1880                 do {
1881                         rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
1882                         if (rc == -EAGAIN)
1883                                 tr.again_counter++;
1884                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1885         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1886                 rc = -EIO;
1887         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1888         xcRB32.reply_data_length = xcRB64.reply_data_length;
1889         xcRB32.status = xcRB64.status;
1890         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1891                 return -EFAULT;
1892         return rc;
1893 }
1894
1895 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1896                          unsigned long arg)
1897 {
1898         int rc;
1899         struct ap_perms *perms =
1900                 (struct ap_perms *) filp->private_data;
1901
1902         rc = zcrypt_check_ioctl(perms, cmd);
1903         if (rc)
1904                 return rc;
1905
1906         if (cmd == ICARSAMODEXPO)
1907                 return trans_modexpo32(perms, filp, cmd, arg);
1908         if (cmd == ICARSACRT)
1909                 return trans_modexpo_crt32(perms, filp, cmd, arg);
1910         if (cmd == ZSECSENDCPRB)
1911                 return trans_xcRB32(perms, filp, cmd, arg);
1912         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1913 }
1914 #endif
1915
1916 /*
1917  * Misc device file operations.
1918  */
1919 static const struct file_operations zcrypt_fops = {
1920         .owner          = THIS_MODULE,
1921         .read           = zcrypt_read,
1922         .write          = zcrypt_write,
1923         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1924 #ifdef CONFIG_COMPAT
1925         .compat_ioctl   = zcrypt_compat_ioctl,
1926 #endif
1927         .open           = zcrypt_open,
1928         .release        = zcrypt_release,
1929         .llseek         = no_llseek,
1930 };
1931
1932 /*
1933  * Misc device.
1934  */
1935 static struct miscdevice zcrypt_misc_device = {
1936         .minor      = MISC_DYNAMIC_MINOR,
1937         .name       = "z90crypt",
1938         .fops       = &zcrypt_fops,
1939 };
1940
1941 static int zcrypt_rng_device_count;
1942 static u32 *zcrypt_rng_buffer;
1943 static int zcrypt_rng_buffer_index;
1944 static DEFINE_MUTEX(zcrypt_rng_mutex);
1945
1946 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1947 {
1948         int rc;
1949
1950         /*
1951          * We don't need locking here because the RNG API guarantees serialized
1952          * read method calls.
1953          */
1954         if (zcrypt_rng_buffer_index == 0) {
1955                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1956                 /* on failure: retry once again after a requested rescan */
1957                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1958                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1959                 if (rc < 0)
1960                         return -EIO;
1961                 zcrypt_rng_buffer_index = rc / sizeof(*data);
1962         }
1963         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1964         return sizeof(*data);
1965 }
1966
1967 static struct hwrng zcrypt_rng_dev = {
1968         .name           = "zcrypt",
1969         .data_read      = zcrypt_rng_data_read,
1970         .quality        = 990,
1971 };
1972
1973 int zcrypt_rng_device_add(void)
1974 {
1975         int rc = 0;
1976
1977         mutex_lock(&zcrypt_rng_mutex);
1978         if (zcrypt_rng_device_count == 0) {
1979                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1980                 if (!zcrypt_rng_buffer) {
1981                         rc = -ENOMEM;
1982                         goto out;
1983                 }
1984                 zcrypt_rng_buffer_index = 0;
1985                 if (!zcrypt_hwrng_seed)
1986                         zcrypt_rng_dev.quality = 0;
1987                 rc = hwrng_register(&zcrypt_rng_dev);
1988                 if (rc)
1989                         goto out_free;
1990                 zcrypt_rng_device_count = 1;
1991         } else
1992                 zcrypt_rng_device_count++;
1993         mutex_unlock(&zcrypt_rng_mutex);
1994         return 0;
1995
1996 out_free:
1997         free_page((unsigned long) zcrypt_rng_buffer);
1998 out:
1999         mutex_unlock(&zcrypt_rng_mutex);
2000         return rc;
2001 }
2002
2003 void zcrypt_rng_device_remove(void)
2004 {
2005         mutex_lock(&zcrypt_rng_mutex);
2006         zcrypt_rng_device_count--;
2007         if (zcrypt_rng_device_count == 0) {
2008                 hwrng_unregister(&zcrypt_rng_dev);
2009                 free_page((unsigned long) zcrypt_rng_buffer);
2010         }
2011         mutex_unlock(&zcrypt_rng_mutex);
2012 }
2013
2014 /*
2015  * Wait until the zcrypt api is operational.
2016  * The AP bus scan and the binding of ap devices to device drivers is
2017  * an asynchronous job. This function waits until these initial jobs
2018  * are done and so the zcrypt api should be ready to serve crypto
2019  * requests - if there are resources available. The function uses an
2020  * internal timeout of 60s. The very first caller will either wait for
2021  * ap bus bindings complete or the timeout happens. This state will be
2022  * remembered for further callers which will only be blocked until a
2023  * decision is made (timeout or bindings complete).
2024  * On timeout -ETIME is returned, on success the return value is 0.
2025  */
2026 int zcrypt_wait_api_operational(void)
2027 {
2028         static DEFINE_MUTEX(zcrypt_wait_api_lock);
2029         static int zcrypt_wait_api_state;
2030         int rc;
2031
2032         rc = mutex_lock_interruptible(&zcrypt_wait_api_lock);
2033         if (rc)
2034                 return rc;
2035
2036         switch (zcrypt_wait_api_state) {
2037         case 0:
2038                 /* initial state, invoke wait for the ap bus complete */
2039                 rc = ap_wait_init_apqn_bindings_complete(
2040                         msecs_to_jiffies(60 * 1000));
2041                 switch (rc) {
2042                 case 0:
2043                         /* ap bus bindings are complete */
2044                         zcrypt_wait_api_state = 1;
2045                         break;
2046                 case -EINTR:
2047                         /* interrupted, go back to caller */
2048                         break;
2049                 case -ETIME:
2050                         /* timeout */
2051                         ZCRYPT_DBF(DBF_WARN,
2052                                    "%s ap_wait_init_apqn_bindings_complete() returned with ETIME\n",
2053                                    __func__);
2054                         zcrypt_wait_api_state = -ETIME;
2055                         break;
2056                 default:
2057                         /* other failure */
2058                         ZCRYPT_DBF(DBF_DEBUG,
2059                                    "%s ap_wait_init_apqn_bindings_complete() failure rc=%d\n",
2060                                    __func__, rc);
2061                         break;
2062                 }
2063                 break;
2064         case 1:
2065                 /* a previous caller already found ap bus bindings complete */
2066                 rc = 0;
2067                 break;
2068         default:
2069                 /* a previous caller had timeout or other failure */
2070                 rc = zcrypt_wait_api_state;
2071                 break;
2072         }
2073
2074         mutex_unlock(&zcrypt_wait_api_lock);
2075
2076         return rc;
2077 }
2078 EXPORT_SYMBOL(zcrypt_wait_api_operational);
2079
2080 int __init zcrypt_debug_init(void)
2081 {
2082         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
2083                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
2084         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
2085         debug_set_level(zcrypt_dbf_info, DBF_ERR);
2086
2087         return 0;
2088 }
2089
2090 void zcrypt_debug_exit(void)
2091 {
2092         debug_unregister(zcrypt_dbf_info);
2093 }
2094
2095 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2096
2097 static int __init zcdn_init(void)
2098 {
2099         int rc;
2100
2101         /* create a new class 'zcrypt' */
2102         zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
2103         if (IS_ERR(zcrypt_class)) {
2104                 rc = PTR_ERR(zcrypt_class);
2105                 goto out_class_create_failed;
2106         }
2107         zcrypt_class->dev_release = zcdn_device_release;
2108
2109         /* alloc device minor range */
2110         rc = alloc_chrdev_region(&zcrypt_devt,
2111                                  0, ZCRYPT_MAX_MINOR_NODES,
2112                                  ZCRYPT_NAME);
2113         if (rc)
2114                 goto out_alloc_chrdev_failed;
2115
2116         cdev_init(&zcrypt_cdev, &zcrypt_fops);
2117         zcrypt_cdev.owner = THIS_MODULE;
2118         rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2119         if (rc)
2120                 goto out_cdev_add_failed;
2121
2122         /* need some class specific sysfs attributes */
2123         rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
2124         if (rc)
2125                 goto out_class_create_file_1_failed;
2126         rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
2127         if (rc)
2128                 goto out_class_create_file_2_failed;
2129
2130         return 0;
2131
2132 out_class_create_file_2_failed:
2133         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2134 out_class_create_file_1_failed:
2135         cdev_del(&zcrypt_cdev);
2136 out_cdev_add_failed:
2137         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2138 out_alloc_chrdev_failed:
2139         class_destroy(zcrypt_class);
2140 out_class_create_failed:
2141         return rc;
2142 }
2143
2144 static void zcdn_exit(void)
2145 {
2146         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2147         class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
2148         zcdn_destroy_all();
2149         cdev_del(&zcrypt_cdev);
2150         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2151         class_destroy(zcrypt_class);
2152 }
2153
2154 #endif
2155
2156 /*
2157  * zcrypt_api_init(): Module initialization.
2158  *
2159  * The module initialization code.
2160  */
2161 int __init zcrypt_api_init(void)
2162 {
2163         int rc;
2164
2165         rc = zcrypt_debug_init();
2166         if (rc)
2167                 goto out;
2168
2169 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2170         rc = zcdn_init();
2171         if (rc)
2172                 goto out;
2173 #endif
2174
2175         /* Register the request sprayer. */
2176         rc = misc_register(&zcrypt_misc_device);
2177         if (rc < 0)
2178                 goto out_misc_register_failed;
2179
2180         zcrypt_msgtype6_init();
2181         zcrypt_msgtype50_init();
2182
2183         return 0;
2184
2185 out_misc_register_failed:
2186 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2187         zcdn_exit();
2188 #endif
2189         zcrypt_debug_exit();
2190 out:
2191         return rc;
2192 }
2193
2194 /*
2195  * zcrypt_api_exit(): Module termination.
2196  *
2197  * The module termination code.
2198  */
2199 void __exit zcrypt_api_exit(void)
2200 {
2201 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2202         zcdn_exit();
2203 #endif
2204         misc_deregister(&zcrypt_misc_device);
2205         zcrypt_msgtype6_exit();
2206         zcrypt_msgtype50_exit();
2207         zcrypt_ccamisc_exit();
2208         zcrypt_ep11misc_exit();
2209         zcrypt_debug_exit();
2210 }
2211
2212 module_init(zcrypt_api_init);
2213 module_exit(zcrypt_api_exit);