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_INFO("%s rescan count=%07d\n", __func__,
  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_INFO("%s releasing zcdn device %d:%d\n",
 345                         __func__, 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_INFO("%s created zcdn device %d:%d\n",
 411                         __func__, 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_WARN("%s ioctl check failed: ioctlnr=0x%04x rc=%d\n",
 554                                 __func__, ioctlnr, rc);
 555
 556         return rc;
 557 }
 558
 559 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
 560 {
 561         return test_bit_inv(card, perms->apm) ? true : false;
 562 }
 563
 564 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
 565 {
 566         return test_bit_inv(queue, perms->aqm) ? true : false;
 567 }
 568
 569 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
 570                                                      struct zcrypt_queue *zq,
 571                                                      struct module **pmod,
 572                                                      unsigned int weight)
 573 {
 574         if (!zq || !try_module_get(zq->queue->ap_dev.device.driver->owner))
 575                 return NULL;
 576         zcrypt_queue_get(zq);
 577         get_device(&zq->queue->ap_dev.device);
 578         atomic_add(weight, &zc->load);
 579         atomic_add(weight, &zq->load);
 580         zq->request_count++;
 581         *pmod = zq->queue->ap_dev.device.driver->owner;
 582         return zq;
 583 }
 584
 585 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
 586                                      struct zcrypt_queue *zq,
 587                                      struct module *mod,
 588                                      unsigned int weight)
 589 {
 590         zq->request_count--;
 591         atomic_sub(weight, &zc->load);
 592         atomic_sub(weight, &zq->load);
 593         put_device(&zq->queue->ap_dev.device);
 594         zcrypt_queue_put(zq);
 595         module_put(mod);
 596 }
 597
 598 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
 599                                        struct zcrypt_card *pref_zc,
 600                                        unsigned int weight,
 601                                        unsigned int pref_weight)
 602 {
 603         if (!pref_zc)
 604                 return true;
 605         weight += atomic_read(&zc->load);
 606         pref_weight += atomic_read(&pref_zc->load);
 607         if (weight == pref_weight)
 608                 return atomic64_read(&zc->card->total_request_count) <
 609                         atomic64_read(&pref_zc->card->total_request_count);
 610         return weight < pref_weight;
 611 }
 612
 613 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
 614                                         struct zcrypt_queue *pref_zq,
 615                                         unsigned int weight,
 616                                         unsigned int pref_weight)
 617 {
 618         if (!pref_zq)
 619                 return true;
 620         weight += atomic_read(&zq->load);
 621         pref_weight += atomic_read(&pref_zq->load);
 622         if (weight == pref_weight)
 623                 return zq->queue->total_request_count <
 624                         pref_zq->queue->total_request_count;
 625         return weight < pref_weight;
 626 }
 627
 628 /*
 629  * zcrypt ioctls.
 630  */
 631 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
 632                                struct zcrypt_track *tr,
 633                                struct ica_rsa_modexpo *mex)
 634 {
 635         struct zcrypt_card *zc, *pref_zc;
 636         struct zcrypt_queue *zq, *pref_zq;
 637         struct ap_message ap_msg;
 638         unsigned int wgt = 0, pref_wgt = 0;
 639         unsigned int func_code;
 640         int cpen, qpen, qid = 0, rc = -ENODEV;
 641         struct module *mod;
 642
 643         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
 644
 645         ap_init_message(&ap_msg);
 646
 647 #ifdef CONFIG_ZCRYPT_DEBUG
 648         if (tr && tr->fi.cmd)
 649                 ap_msg.fi.cmd = tr->fi.cmd;
 650 #endif
 651
 652         if (mex->outputdatalength < mex->inputdatalength) {
 653                 func_code = 0;
 654                 rc = -EINVAL;
 655                 goto out;
 656         }
 657
 658         /*
 659          * As long as outputdatalength is big enough, we can set the
 660          * outputdatalength equal to the inputdatalength, since that is the
 661          * number of bytes we will copy in any case
 662          */
 663         mex->outputdatalength = mex->inputdatalength;
 664
 665         rc = get_rsa_modex_fc(mex, &func_code);
 666         if (rc)
 667                 goto out;
 668
 669         pref_zc = NULL;
 670         pref_zq = NULL;
 671         spin_lock(&zcrypt_list_lock);
 672         for_each_zcrypt_card(zc) {
 673                 /* Check for useable accelarator or CCA card */
 674                 if (!zc->online || !zc->card->config ||
 675                     !(zc->card->functions & 0x18000000))
 676                         continue;
 677                 /* Check for size limits */
 678                 if (zc->min_mod_size > mex->inputdatalength ||
 679                     zc->max_mod_size < mex->inputdatalength)
 680                         continue;
 681                 /* check if device node has admission for this card */
 682                 if (!zcrypt_check_card(perms, zc->card->id))
 683                         continue;
 684                 /* get weight index of the card device  */
 685                 wgt = zc->speed_rating[func_code];
 686                 /* penalty if this msg was previously sent via this card */
 687                 cpen = (tr && tr->again_counter && tr->last_qid &&
 688                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
 689                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
 690                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 691                         continue;
 692                 for_each_zcrypt_queue(zq, zc) {
 693                         /* check if device is useable and eligible */
 694                         if (!zq->online || !zq->ops->rsa_modexpo ||
 695                             !zq->queue->config)
 696                                 continue;
 697                         /* check if device node has admission for this queue */
 698                         if (!zcrypt_check_queue(perms,
 699                                                 AP_QID_QUEUE(zq->queue->qid)))
 700                                 continue;
 701                         /* penalty if the msg was previously sent at this qid */
 702                         qpen = (tr && tr->again_counter && tr->last_qid &&
 703                                 tr->last_qid == zq->queue->qid) ?
 704                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
 705                         if (!zcrypt_queue_compare(zq, pref_zq,
 706                                                   wgt + cpen + qpen, pref_wgt))
 707                                 continue;
 708                         pref_zc = zc;
 709                         pref_zq = zq;
 710                         pref_wgt = wgt + cpen + qpen;
 711                 }
 712         }
 713         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
 714         spin_unlock(&zcrypt_list_lock);
 715
 716         if (!pref_zq) {
 717                 rc = -ENODEV;
 718                 goto out;
 719         }
 720
 721         qid = pref_zq->queue->qid;
 722         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
 723
 724         spin_lock(&zcrypt_list_lock);
 725         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 726         spin_unlock(&zcrypt_list_lock);
 727
 728 out:
 729         ap_release_message(&ap_msg);
 730         if (tr) {
 731                 tr->last_rc = rc;
 732                 tr->last_qid = qid;
 733         }
 734         trace_s390_zcrypt_rep(mex, func_code, rc,
 735                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 736         return rc;
 737 }
 738
 739 static long zcrypt_rsa_crt(struct ap_perms *perms,
 740                            struct zcrypt_track *tr,
 741                            struct ica_rsa_modexpo_crt *crt)
 742 {
 743         struct zcrypt_card *zc, *pref_zc;
 744         struct zcrypt_queue *zq, *pref_zq;
 745         struct ap_message ap_msg;
 746         unsigned int wgt = 0, pref_wgt = 0;
 747         unsigned int func_code;
 748         int cpen, qpen, qid = 0, rc = -ENODEV;
 749         struct module *mod;
 750
 751         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
 752
 753         ap_init_message(&ap_msg);
 754
 755 #ifdef CONFIG_ZCRYPT_DEBUG
 756         if (tr && tr->fi.cmd)
 757                 ap_msg.fi.cmd = tr->fi.cmd;
 758 #endif
 759
 760         if (crt->outputdatalength < crt->inputdatalength) {
 761                 func_code = 0;
 762                 rc = -EINVAL;
 763                 goto out;
 764         }
 765
 766         /*
 767          * As long as outputdatalength is big enough, we can set the
 768          * outputdatalength equal to the inputdatalength, since that is the
 769          * number of bytes we will copy in any case
 770          */
 771         crt->outputdatalength = crt->inputdatalength;
 772
 773         rc = get_rsa_crt_fc(crt, &func_code);
 774         if (rc)
 775                 goto out;
 776
 777         pref_zc = NULL;
 778         pref_zq = NULL;
 779         spin_lock(&zcrypt_list_lock);
 780         for_each_zcrypt_card(zc) {
 781                 /* Check for useable accelarator or CCA card */
 782                 if (!zc->online || !zc->card->config ||
 783                     !(zc->card->functions & 0x18000000))
 784                         continue;
 785                 /* Check for size limits */
 786                 if (zc->min_mod_size > crt->inputdatalength ||
 787                     zc->max_mod_size < crt->inputdatalength)
 788                         continue;
 789                 /* check if device node has admission for this card */
 790                 if (!zcrypt_check_card(perms, zc->card->id))
 791                         continue;
 792                 /* get weight index of the card device  */
 793                 wgt = zc->speed_rating[func_code];
 794                 /* penalty if this msg was previously sent via this card */
 795                 cpen = (tr && tr->again_counter && tr->last_qid &&
 796                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
 797                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
 798                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 799                         continue;
 800                 for_each_zcrypt_queue(zq, zc) {
 801                         /* check if device is useable and eligible */
 802                         if (!zq->online || !zq->ops->rsa_modexpo_crt ||
 803                             !zq->queue->config)
 804                                 continue;
 805                         /* check if device node has admission for this queue */
 806                         if (!zcrypt_check_queue(perms,
 807                                                 AP_QID_QUEUE(zq->queue->qid)))
 808                                 continue;
 809                         /* penalty if the msg was previously sent at this qid */
 810                         qpen = (tr && tr->again_counter && tr->last_qid &&
 811                                 tr->last_qid == zq->queue->qid) ?
 812                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
 813                         if (!zcrypt_queue_compare(zq, pref_zq,
 814                                                   wgt + cpen + qpen, pref_wgt))
 815                                 continue;
 816                         pref_zc = zc;
 817                         pref_zq = zq;
 818                         pref_wgt = wgt + cpen + qpen;
 819                 }
 820         }
 821         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
 822         spin_unlock(&zcrypt_list_lock);
 823
 824         if (!pref_zq) {
 825                 rc = -ENODEV;
 826                 goto out;
 827         }
 828
 829         qid = pref_zq->queue->qid;
 830         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
 831
 832         spin_lock(&zcrypt_list_lock);
 833         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 834         spin_unlock(&zcrypt_list_lock);
 835
 836 out:
 837         ap_release_message(&ap_msg);
 838         if (tr) {
 839                 tr->last_rc = rc;
 840                 tr->last_qid = qid;
 841         }
 842         trace_s390_zcrypt_rep(crt, func_code, rc,
 843                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 844         return rc;
 845 }
 846
 847 static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
 848                               struct zcrypt_track *tr,
 849                               struct ica_xcRB *xcRB)
 850 {
 851         struct zcrypt_card *zc, *pref_zc;
 852         struct zcrypt_queue *zq, *pref_zq;
 853         struct ap_message ap_msg;
 854         unsigned int wgt = 0, pref_wgt = 0;
 855         unsigned int func_code;
 856         unsigned short *domain, tdom;
 857         int cpen, qpen, qid = 0, rc = -ENODEV;
 858         struct module *mod;
 859
 860         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
 861
 862         xcRB->status = 0;
 863         ap_init_message(&ap_msg);
 864
 865 #ifdef CONFIG_ZCRYPT_DEBUG
 866         if (tr && tr->fi.cmd)
 867                 ap_msg.fi.cmd = tr->fi.cmd;
 868         if (tr && tr->fi.action == AP_FI_ACTION_CCA_AGENT_FF) {
 869                 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid agent_ID 'FF'\n",
 870                                 __func__, tr->fi.cmd);
 871                 xcRB->agent_ID = 0x4646;
 872         }
 873 #endif
 874
 875         rc = get_cprb_fc(userspace, xcRB, &ap_msg, &func_code, &domain);
 876         if (rc)
 877                 goto out;
 878
 879         /*
 880          * If a valid target domain is set and this domain is NOT a usage
 881          * domain but a control only domain, autoselect target domain.
 882          */
 883         tdom = *domain;
 884         if (tdom < AP_DOMAINS &&
 885             !ap_test_config_usage_domain(tdom) &&
 886             ap_test_config_ctrl_domain(tdom))
 887                 tdom = AUTOSEL_DOM;
 888
 889         pref_zc = NULL;
 890         pref_zq = NULL;
 891         spin_lock(&zcrypt_list_lock);
 892         for_each_zcrypt_card(zc) {
 893                 /* Check for useable CCA card */
 894                 if (!zc->online || !zc->card->config ||
 895                     !(zc->card->functions & 0x10000000))
 896                         continue;
 897                 /* Check for user selected CCA card */
 898                 if (xcRB->user_defined != AUTOSELECT &&
 899                     xcRB->user_defined != zc->card->id)
 900                         continue;
 901                 /* check if request size exceeds card max msg size */
 902                 if (ap_msg.len > zc->card->maxmsgsize)
 903                         continue;
 904                 /* check if device node has admission for this card */
 905                 if (!zcrypt_check_card(perms, zc->card->id))
 906                         continue;
 907                 /* get weight index of the card device  */
 908                 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 909                 /* penalty if this msg was previously sent via this card */
 910                 cpen = (tr && tr->again_counter && tr->last_qid &&
 911                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
 912                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
 913                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 914                         continue;
 915                 for_each_zcrypt_queue(zq, zc) {
 916                         /* check for device useable and eligible */
 917                         if (!zq->online ||
 918                             !zq->ops->send_cprb ||
 919                             !zq->queue->config ||
 920                             (tdom != AUTOSEL_DOM &&
 921                              tdom != AP_QID_QUEUE(zq->queue->qid)))
 922                                 continue;
 923                         /* check if device node has admission for this queue */
 924                         if (!zcrypt_check_queue(perms,
 925                                                 AP_QID_QUEUE(zq->queue->qid)))
 926                                 continue;
 927                         /* penalty if the msg was previously sent at this qid */
 928                         qpen = (tr && tr->again_counter && tr->last_qid &&
 929                                 tr->last_qid == zq->queue->qid) ?
 930                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
 931                         if (!zcrypt_queue_compare(zq, pref_zq,
 932                                                   wgt + cpen + qpen, pref_wgt))
 933                                 continue;
 934                         pref_zc = zc;
 935                         pref_zq = zq;
 936                         pref_wgt = wgt + cpen + qpen;
 937                 }
 938         }
 939         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
 940         spin_unlock(&zcrypt_list_lock);
 941
 942         if (!pref_zq) {
 943                 rc = -ENODEV;
 944                 goto out;
 945         }
 946
 947         /* in case of auto select, provide the correct domain */
 948         qid = pref_zq->queue->qid;
 949         if (*domain == AUTOSEL_DOM)
 950                 *domain = AP_QID_QUEUE(qid);
 951
 952 #ifdef CONFIG_ZCRYPT_DEBUG
 953         if (tr && tr->fi.action == AP_FI_ACTION_CCA_DOM_INVAL) {
 954                 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid domain\n",
 955                                 __func__, tr->fi.cmd);
 956                 *domain = 99;
 957         }
 958 #endif
 959
 960         rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcRB, &ap_msg);
 961
 962         spin_lock(&zcrypt_list_lock);
 963         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 964         spin_unlock(&zcrypt_list_lock);
 965
 966 out:
 967         ap_release_message(&ap_msg);
 968         if (tr) {
 969                 tr->last_rc = rc;
 970                 tr->last_qid = qid;
 971         }
 972         trace_s390_zcrypt_rep(xcRB, func_code, rc,
 973                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 974         return rc;
 975 }
 976
 977 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
 978 {
 979         return _zcrypt_send_cprb(false, &ap_perms, NULL, xcRB);
 980 }
 981 EXPORT_SYMBOL(zcrypt_send_cprb);
 982
 983 static bool is_desired_ep11_card(unsigned int dev_id,
 984                                  unsigned short target_num,
 985                                  struct ep11_target_dev *targets)
 986 {
 987         while (target_num-- > 0) {
 988                 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
 989                         return true;
 990                 targets++;
 991         }
 992         return false;
 993 }
 994
 995 static bool is_desired_ep11_queue(unsigned int dev_qid,
 996                                   unsigned short target_num,
 997                                   struct ep11_target_dev *targets)
 998 {
 999         int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
1000
1001         while (target_num-- > 0) {
1002                 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
1003                     (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
1004                         return true;
1005                 targets++;
1006         }
1007         return false;
1008 }
1009
1010 static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
1011                                    struct zcrypt_track *tr,
1012                                    struct ep11_urb *xcrb)
1013 {
1014         struct zcrypt_card *zc, *pref_zc;
1015         struct zcrypt_queue *zq, *pref_zq;
1016         struct ep11_target_dev *targets;
1017         unsigned short target_num;
1018         unsigned int wgt = 0, pref_wgt = 0;
1019         unsigned int func_code;
1020         struct ap_message ap_msg;
1021         int cpen, qpen, qid = 0, rc = -ENODEV;
1022         struct module *mod;
1023
1024         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
1025
1026         ap_init_message(&ap_msg);
1027
1028 #ifdef CONFIG_ZCRYPT_DEBUG
1029         if (tr && tr->fi.cmd)
1030                 ap_msg.fi.cmd = tr->fi.cmd;
1031 #endif
1032
1033         target_num = (unsigned short) xcrb->targets_num;
1034
1035         /* empty list indicates autoselect (all available targets) */
1036         targets = NULL;
1037         if (target_num != 0) {
1038                 struct ep11_target_dev __user *uptr;
1039
1040                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
1041                 if (!targets) {
1042                         func_code = 0;
1043                         rc = -ENOMEM;
1044                         goto out;
1045                 }
1046
1047                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
1048                 if (z_copy_from_user(userspace, targets, uptr,
1049                                    target_num * sizeof(*targets))) {
1050                         func_code = 0;
1051                         rc = -EFAULT;
1052                         goto out_free;
1053                 }
1054         }
1055
1056         rc = get_ep11cprb_fc(userspace, xcrb, &ap_msg, &func_code);
1057         if (rc)
1058                 goto out_free;
1059
1060         pref_zc = NULL;
1061         pref_zq = NULL;
1062         spin_lock(&zcrypt_list_lock);
1063         for_each_zcrypt_card(zc) {
1064                 /* Check for useable EP11 card */
1065                 if (!zc->online || !zc->card->config ||
1066                     !(zc->card->functions & 0x04000000))
1067                         continue;
1068                 /* Check for user selected EP11 card */
1069                 if (targets &&
1070                     !is_desired_ep11_card(zc->card->id, target_num, targets))
1071                         continue;
1072                 /* check if request size exceeds card max msg size */
1073                 if (ap_msg.len > zc->card->maxmsgsize)
1074                         continue;
1075                 /* check if device node has admission for this card */
1076                 if (!zcrypt_check_card(perms, zc->card->id))
1077                         continue;
1078                 /* get weight index of the card device  */
1079                 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1080                 /* penalty if this msg was previously sent via this card */
1081                 cpen = (tr && tr->again_counter && tr->last_qid &&
1082                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
1083                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
1084                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
1085                         continue;
1086                 for_each_zcrypt_queue(zq, zc) {
1087                         /* check if device is useable and eligible */
1088                         if (!zq->online ||
1089                             !zq->ops->send_ep11_cprb ||
1090                             !zq->queue->config ||
1091                             (targets &&
1092                              !is_desired_ep11_queue(zq->queue->qid,
1093                                                     target_num, targets)))
1094                                 continue;
1095                         /* check if device node has admission for this queue */
1096                         if (!zcrypt_check_queue(perms,
1097                                                 AP_QID_QUEUE(zq->queue->qid)))
1098                                 continue;
1099                         /* penalty if the msg was previously sent at this qid */
1100                         qpen = (tr && tr->again_counter && tr->last_qid &&
1101                                 tr->last_qid == zq->queue->qid) ?
1102                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
1103                         if (!zcrypt_queue_compare(zq, pref_zq,
1104                                                   wgt + cpen + qpen, pref_wgt))
1105                                 continue;
1106                         pref_zc = zc;
1107                         pref_zq = zq;
1108                         pref_wgt = wgt + cpen + qpen;
1109                 }
1110         }
1111         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1112         spin_unlock(&zcrypt_list_lock);
1113
1114         if (!pref_zq) {
1115                 rc = -ENODEV;
1116                 goto out_free;
1117         }
1118
1119         qid = pref_zq->queue->qid;
1120         rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
1121
1122         spin_lock(&zcrypt_list_lock);
1123         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1124         spin_unlock(&zcrypt_list_lock);
1125
1126 out_free:
1127         kfree(targets);
1128 out:
1129         ap_release_message(&ap_msg);
1130         if (tr) {
1131                 tr->last_rc = rc;
1132                 tr->last_qid = qid;
1133         }
1134         trace_s390_zcrypt_rep(xcrb, func_code, rc,
1135                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1136         return rc;
1137 }
1138
1139 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1140 {
1141         return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb);
1142 }
1143 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1144
1145 static long zcrypt_rng(char *buffer)
1146 {
1147         struct zcrypt_card *zc, *pref_zc;
1148         struct zcrypt_queue *zq, *pref_zq;
1149         unsigned int wgt = 0, pref_wgt = 0;
1150         unsigned int func_code;
1151         struct ap_message ap_msg;
1152         unsigned int domain;
1153         int qid = 0, rc = -ENODEV;
1154         struct module *mod;
1155
1156         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1157
1158         ap_init_message(&ap_msg);
1159         rc = get_rng_fc(&ap_msg, &func_code, &domain);
1160         if (rc)
1161                 goto out;
1162
1163         pref_zc = NULL;
1164         pref_zq = NULL;
1165         spin_lock(&zcrypt_list_lock);
1166         for_each_zcrypt_card(zc) {
1167                 /* Check for useable CCA card */
1168                 if (!zc->online || !zc->card->config ||
1169                     !(zc->card->functions & 0x10000000))
1170                         continue;
1171                 /* get weight index of the card device  */
1172                 wgt = zc->speed_rating[func_code];
1173                 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
1174                         continue;
1175                 for_each_zcrypt_queue(zq, zc) {
1176                         /* check if device is useable and eligible */
1177                         if (!zq->online || !zq->ops->rng ||
1178                             !zq->queue->config)
1179                                 continue;
1180                         if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
1181                                 continue;
1182                         pref_zc = zc;
1183                         pref_zq = zq;
1184                         pref_wgt = wgt;
1185                 }
1186         }
1187         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1188         spin_unlock(&zcrypt_list_lock);
1189
1190         if (!pref_zq) {
1191                 rc = -ENODEV;
1192                 goto out;
1193         }
1194
1195         qid = pref_zq->queue->qid;
1196         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1197
1198         spin_lock(&zcrypt_list_lock);
1199         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1200         spin_unlock(&zcrypt_list_lock);
1201
1202 out:
1203         ap_release_message(&ap_msg);
1204         trace_s390_zcrypt_rep(buffer, func_code, rc,
1205                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1206         return rc;
1207 }
1208
1209 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1210 {
1211         struct zcrypt_card *zc;
1212         struct zcrypt_queue *zq;
1213         struct zcrypt_device_status *stat;
1214         int card, queue;
1215
1216         memset(devstatus, 0, MAX_ZDEV_ENTRIES
1217                * sizeof(struct zcrypt_device_status));
1218
1219         spin_lock(&zcrypt_list_lock);
1220         for_each_zcrypt_card(zc) {
1221                 for_each_zcrypt_queue(zq, zc) {
1222                         card = AP_QID_CARD(zq->queue->qid);
1223                         if (card >= MAX_ZDEV_CARDIDS)
1224                                 continue;
1225                         queue = AP_QID_QUEUE(zq->queue->qid);
1226                         stat = &devstatus[card * AP_DOMAINS + queue];
1227                         stat->hwtype = zc->card->ap_dev.device_type;
1228                         stat->functions = zc->card->functions >> 26;
1229                         stat->qid = zq->queue->qid;
1230                         stat->online = zq->online ? 0x01 : 0x00;
1231                 }
1232         }
1233         spin_unlock(&zcrypt_list_lock);
1234 }
1235
1236 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1237 {
1238         struct zcrypt_card *zc;
1239         struct zcrypt_queue *zq;
1240         struct zcrypt_device_status_ext *stat;
1241         int card, queue;
1242
1243         memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1244                * sizeof(struct zcrypt_device_status_ext));
1245
1246         spin_lock(&zcrypt_list_lock);
1247         for_each_zcrypt_card(zc) {
1248                 for_each_zcrypt_queue(zq, zc) {
1249                         card = AP_QID_CARD(zq->queue->qid);
1250                         queue = AP_QID_QUEUE(zq->queue->qid);
1251                         stat = &devstatus[card * AP_DOMAINS + queue];
1252                         stat->hwtype = zc->card->ap_dev.device_type;
1253                         stat->functions = zc->card->functions >> 26;
1254                         stat->qid = zq->queue->qid;
1255                         stat->online = zq->online ? 0x01 : 0x00;
1256                 }
1257         }
1258         spin_unlock(&zcrypt_list_lock);
1259 }
1260 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1261
1262 int zcrypt_device_status_ext(int card, int queue,
1263                              struct zcrypt_device_status_ext *devstat)
1264 {
1265         struct zcrypt_card *zc;
1266         struct zcrypt_queue *zq;
1267
1268         memset(devstat, 0, sizeof(*devstat));
1269
1270         spin_lock(&zcrypt_list_lock);
1271         for_each_zcrypt_card(zc) {
1272                 for_each_zcrypt_queue(zq, zc) {
1273                         if (card == AP_QID_CARD(zq->queue->qid) &&
1274                             queue == AP_QID_QUEUE(zq->queue->qid)) {
1275                                 devstat->hwtype = zc->card->ap_dev.device_type;
1276                                 devstat->functions = zc->card->functions >> 26;
1277                                 devstat->qid = zq->queue->qid;
1278                                 devstat->online = zq->online ? 0x01 : 0x00;
1279                                 spin_unlock(&zcrypt_list_lock);
1280                                 return 0;
1281                         }
1282                 }
1283         }
1284         spin_unlock(&zcrypt_list_lock);
1285
1286         return -ENODEV;
1287 }
1288 EXPORT_SYMBOL(zcrypt_device_status_ext);
1289
1290 static void zcrypt_status_mask(char status[], size_t max_adapters)
1291 {
1292         struct zcrypt_card *zc;
1293         struct zcrypt_queue *zq;
1294         int card;
1295
1296         memset(status, 0, max_adapters);
1297         spin_lock(&zcrypt_list_lock);
1298         for_each_zcrypt_card(zc) {
1299                 for_each_zcrypt_queue(zq, zc) {
1300                         card = AP_QID_CARD(zq->queue->qid);
1301                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1302                             || card >= max_adapters)
1303                                 continue;
1304                         status[card] = zc->online ? zc->user_space_type : 0x0d;
1305                 }
1306         }
1307         spin_unlock(&zcrypt_list_lock);
1308 }
1309
1310 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1311 {
1312         struct zcrypt_card *zc;
1313         struct zcrypt_queue *zq;
1314         int card;
1315
1316         memset(qdepth, 0, max_adapters);
1317         spin_lock(&zcrypt_list_lock);
1318         local_bh_disable();
1319         for_each_zcrypt_card(zc) {
1320                 for_each_zcrypt_queue(zq, zc) {
1321                         card = AP_QID_CARD(zq->queue->qid);
1322                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1323                             || card >= max_adapters)
1324                                 continue;
1325                         spin_lock(&zq->queue->lock);
1326                         qdepth[card] =
1327                                 zq->queue->pendingq_count +
1328                                 zq->queue->requestq_count;
1329                         spin_unlock(&zq->queue->lock);
1330                 }
1331         }
1332         local_bh_enable();
1333         spin_unlock(&zcrypt_list_lock);
1334 }
1335
1336 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1337 {
1338         struct zcrypt_card *zc;
1339         struct zcrypt_queue *zq;
1340         int card;
1341         u64 cnt;
1342
1343         memset(reqcnt, 0, sizeof(int) * max_adapters);
1344         spin_lock(&zcrypt_list_lock);
1345         local_bh_disable();
1346         for_each_zcrypt_card(zc) {
1347                 for_each_zcrypt_queue(zq, zc) {
1348                         card = AP_QID_CARD(zq->queue->qid);
1349                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1350                             || card >= max_adapters)
1351                                 continue;
1352                         spin_lock(&zq->queue->lock);
1353                         cnt = zq->queue->total_request_count;
1354                         spin_unlock(&zq->queue->lock);
1355                         reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX;
1356                 }
1357         }
1358         local_bh_enable();
1359         spin_unlock(&zcrypt_list_lock);
1360 }
1361
1362 static int zcrypt_pendingq_count(void)
1363 {
1364         struct zcrypt_card *zc;
1365         struct zcrypt_queue *zq;
1366         int pendingq_count;
1367
1368         pendingq_count = 0;
1369         spin_lock(&zcrypt_list_lock);
1370         local_bh_disable();
1371         for_each_zcrypt_card(zc) {
1372                 for_each_zcrypt_queue(zq, zc) {
1373                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1374                                 continue;
1375                         spin_lock(&zq->queue->lock);
1376                         pendingq_count += zq->queue->pendingq_count;
1377                         spin_unlock(&zq->queue->lock);
1378                 }
1379         }
1380         local_bh_enable();
1381         spin_unlock(&zcrypt_list_lock);
1382         return pendingq_count;
1383 }
1384
1385 static int zcrypt_requestq_count(void)
1386 {
1387         struct zcrypt_card *zc;
1388         struct zcrypt_queue *zq;
1389         int requestq_count;
1390
1391         requestq_count = 0;
1392         spin_lock(&zcrypt_list_lock);
1393         local_bh_disable();
1394         for_each_zcrypt_card(zc) {
1395                 for_each_zcrypt_queue(zq, zc) {
1396                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1397                                 continue;
1398                         spin_lock(&zq->queue->lock);
1399                         requestq_count += zq->queue->requestq_count;
1400                         spin_unlock(&zq->queue->lock);
1401                 }
1402         }
1403         local_bh_enable();
1404         spin_unlock(&zcrypt_list_lock);
1405         return requestq_count;
1406 }
1407
1408 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1409 {
1410         int rc;
1411         struct zcrypt_track tr;
1412         struct ica_rsa_modexpo mex;
1413         struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1414
1415         memset(&tr, 0, sizeof(tr));
1416         if (copy_from_user(&mex, umex, sizeof(mex)))
1417                 return -EFAULT;
1418
1419 #ifdef CONFIG_ZCRYPT_DEBUG
1420         if (mex.inputdatalength & (1U << 31)) {
1421                 if (!capable(CAP_SYS_ADMIN))
1422                         return -EPERM;
1423                 tr.fi.cmd = (u16)(mex.inputdatalength >> 16);
1424         }
1425         mex.inputdatalength &= 0x0000FFFF;
1426 #endif
1427
1428         do {
1429                 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1430                 if (rc == -EAGAIN)
1431                         tr.again_counter++;
1432 #ifdef CONFIG_ZCRYPT_DEBUG
1433                 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1434                         break;
1435 #endif
1436         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1437         /* on failure: retry once again after a requested rescan */
1438         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1439                 do {
1440                         rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1441                         if (rc == -EAGAIN)
1442                                 tr.again_counter++;
1443                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1444         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1445                 rc = -EIO;
1446         if (rc) {
1447                 ZCRYPT_DBF_DBG("ioctl ICARSAMODEXPO rc=%d\n", rc);
1448                 return rc;
1449         }
1450         return put_user(mex.outputdatalength, &umex->outputdatalength);
1451 }
1452
1453 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1454 {
1455         int rc;
1456         struct zcrypt_track tr;
1457         struct ica_rsa_modexpo_crt crt;
1458         struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1459
1460         memset(&tr, 0, sizeof(tr));
1461         if (copy_from_user(&crt, ucrt, sizeof(crt)))
1462                 return -EFAULT;
1463
1464 #ifdef CONFIG_ZCRYPT_DEBUG
1465         if (crt.inputdatalength & (1U << 31)) {
1466                 if (!capable(CAP_SYS_ADMIN))
1467                         return -EPERM;
1468                 tr.fi.cmd = (u16)(crt.inputdatalength >> 16);
1469         }
1470         crt.inputdatalength &= 0x0000FFFF;
1471 #endif
1472
1473         do {
1474                 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1475                 if (rc == -EAGAIN)
1476                         tr.again_counter++;
1477 #ifdef CONFIG_ZCRYPT_DEBUG
1478                 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1479                         break;
1480 #endif
1481         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1482         /* on failure: retry once again after a requested rescan */
1483         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1484                 do {
1485                         rc = zcrypt_rsa_crt(perms, &tr, &crt);
1486                         if (rc == -EAGAIN)
1487                                 tr.again_counter++;
1488                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1489         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1490                 rc = -EIO;
1491         if (rc) {
1492                 ZCRYPT_DBF_DBG("ioctl ICARSACRT rc=%d\n", rc);
1493                 return rc;
1494         }
1495         return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1496 }
1497
1498 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1499 {
1500         int rc;
1501         struct ica_xcRB xcRB;
1502         struct zcrypt_track tr;
1503         struct ica_xcRB __user *uxcRB = (void __user *) arg;
1504
1505         memset(&tr, 0, sizeof(tr));
1506         if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1507                 return -EFAULT;
1508
1509 #ifdef CONFIG_ZCRYPT_DEBUG
1510         if ((xcRB.status & 0x8000FFFF) == 0x80004649 /* 'FI' */) {
1511                 if (!capable(CAP_SYS_ADMIN))
1512                         return -EPERM;
1513                 tr.fi.cmd = (u16)(xcRB.status >> 16);
1514         }
1515         xcRB.status = 0;
1516 #endif
1517
1518         do {
1519                 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
1520                 if (rc == -EAGAIN)
1521                         tr.again_counter++;
1522 #ifdef CONFIG_ZCRYPT_DEBUG
1523                 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1524                         break;
1525 #endif
1526         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1527         /* on failure: retry once again after a requested rescan */
1528         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1529                 do {
1530                         rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
1531                         if (rc == -EAGAIN)
1532                                 tr.again_counter++;
1533                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1534         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1535                 rc = -EIO;
1536         if (rc)
1537                 ZCRYPT_DBF_DBG("ioctl ZSENDCPRB rc=%d status=0x%x\n",
1538                                rc, xcRB.status);
1539         if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1540                 return -EFAULT;
1541         return rc;
1542 }
1543
1544 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1545 {
1546         int rc;
1547         struct ep11_urb xcrb;
1548         struct zcrypt_track tr;
1549         struct ep11_urb __user *uxcrb = (void __user *)arg;
1550
1551         memset(&tr, 0, sizeof(tr));
1552         if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1553                 return -EFAULT;
1554
1555 #ifdef CONFIG_ZCRYPT_DEBUG
1556         if (xcrb.req_len & (1ULL << 63)) {
1557                 if (!capable(CAP_SYS_ADMIN))
1558                         return -EPERM;
1559                 tr.fi.cmd = (u16)(xcrb.req_len >> 48);
1560         }
1561         xcrb.req_len &= 0x0000FFFFFFFFFFFFULL;
1562 #endif
1563
1564         do {
1565                 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1566                 if (rc == -EAGAIN)
1567                         tr.again_counter++;
1568 #ifdef CONFIG_ZCRYPT_DEBUG
1569                 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1570                         break;
1571 #endif
1572         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1573         /* on failure: retry once again after a requested rescan */
1574         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1575                 do {
1576                         rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1577                         if (rc == -EAGAIN)
1578                                 tr.again_counter++;
1579                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1580         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1581                 rc = -EIO;
1582         if (rc)
1583                 ZCRYPT_DBF_DBG("ioctl ZSENDEP11CPRB rc=%d\n", rc);
1584         if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1585                 return -EFAULT;
1586         return rc;
1587 }
1588
1589 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1590                                   unsigned long arg)
1591 {
1592         int rc;
1593         struct ap_perms *perms =
1594                 (struct ap_perms *) filp->private_data;
1595
1596         rc = zcrypt_check_ioctl(perms, cmd);
1597         if (rc)
1598                 return rc;
1599
1600         switch (cmd) {
1601         case ICARSAMODEXPO:
1602                 return icarsamodexpo_ioctl(perms, arg);
1603         case ICARSACRT:
1604                 return icarsacrt_ioctl(perms, arg);
1605         case ZSECSENDCPRB:
1606                 return zsecsendcprb_ioctl(perms, arg);
1607         case ZSENDEP11CPRB:
1608                 return zsendep11cprb_ioctl(perms, arg);
1609         case ZCRYPT_DEVICE_STATUS: {
1610                 struct zcrypt_device_status_ext *device_status;
1611                 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1612                         * sizeof(struct zcrypt_device_status_ext);
1613
1614                 device_status = kzalloc(total_size, GFP_KERNEL);
1615                 if (!device_status)
1616                         return -ENOMEM;
1617                 zcrypt_device_status_mask_ext(device_status);
1618                 if (copy_to_user((char __user *) arg, device_status,
1619                                  total_size))
1620                         rc = -EFAULT;
1621                 kfree(device_status);
1622                 return rc;
1623         }
1624         case ZCRYPT_STATUS_MASK: {
1625                 char status[AP_DEVICES];
1626
1627                 zcrypt_status_mask(status, AP_DEVICES);
1628                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1629                         return -EFAULT;
1630                 return 0;
1631         }
1632         case ZCRYPT_QDEPTH_MASK: {
1633                 char qdepth[AP_DEVICES];
1634
1635                 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1636                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1637                         return -EFAULT;
1638                 return 0;
1639         }
1640         case ZCRYPT_PERDEV_REQCNT: {
1641                 u32 *reqcnt;
1642
1643                 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1644                 if (!reqcnt)
1645                         return -ENOMEM;
1646                 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1647                 if (copy_to_user((int __user *) arg, reqcnt,
1648                                  sizeof(u32) * AP_DEVICES))
1649                         rc = -EFAULT;
1650                 kfree(reqcnt);
1651                 return rc;
1652         }
1653         case Z90STAT_REQUESTQ_COUNT:
1654                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1655         case Z90STAT_PENDINGQ_COUNT:
1656                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1657         case Z90STAT_TOTALOPEN_COUNT:
1658                 return put_user(atomic_read(&zcrypt_open_count),
1659                                 (int __user *) arg);
1660         case Z90STAT_DOMAIN_INDEX:
1661                 return put_user(ap_domain_index, (int __user *) arg);
1662         /*
1663          * Deprecated ioctls
1664          */
1665         case ZDEVICESTATUS: {
1666                 /* the old ioctl supports only 64 adapters */
1667                 struct zcrypt_device_status *device_status;
1668                 size_t total_size = MAX_ZDEV_ENTRIES
1669                         * sizeof(struct zcrypt_device_status);
1670
1671                 device_status = kzalloc(total_size, GFP_KERNEL);
1672                 if (!device_status)
1673                         return -ENOMEM;
1674                 zcrypt_device_status_mask(device_status);
1675                 if (copy_to_user((char __user *) arg, device_status,
1676                                  total_size))
1677                         rc = -EFAULT;
1678                 kfree(device_status);
1679                 return rc;
1680         }
1681         case Z90STAT_STATUS_MASK: {
1682                 /* the old ioctl supports only 64 adapters */
1683                 char status[MAX_ZDEV_CARDIDS];
1684
1685                 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1686                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1687                         return -EFAULT;
1688                 return 0;
1689         }
1690         case Z90STAT_QDEPTH_MASK: {
1691                 /* the old ioctl supports only 64 adapters */
1692                 char qdepth[MAX_ZDEV_CARDIDS];
1693
1694                 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1695                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1696                         return -EFAULT;
1697                 return 0;
1698         }
1699         case Z90STAT_PERDEV_REQCNT: {
1700                 /* the old ioctl supports only 64 adapters */
1701                 u32 reqcnt[MAX_ZDEV_CARDIDS];
1702
1703                 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1704                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1705                         return -EFAULT;
1706                 return 0;
1707         }
1708         /* unknown ioctl number */
1709         default:
1710                 ZCRYPT_DBF_DBG("unknown ioctl 0x%08x\n", cmd);
1711                 return -ENOIOCTLCMD;
1712         }
1713 }
1714
1715 #ifdef CONFIG_COMPAT
1716 /*
1717  * ioctl32 conversion routines
1718  */
1719 struct compat_ica_rsa_modexpo {
1720         compat_uptr_t   inputdata;
1721         unsigned int    inputdatalength;
1722         compat_uptr_t   outputdata;
1723         unsigned int    outputdatalength;
1724         compat_uptr_t   b_key;
1725         compat_uptr_t   n_modulus;
1726 };
1727
1728 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1729                             unsigned int cmd, unsigned long arg)
1730 {
1731         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1732         struct compat_ica_rsa_modexpo mex32;
1733         struct ica_rsa_modexpo mex64;
1734         struct zcrypt_track tr;
1735         long rc;
1736
1737         memset(&tr, 0, sizeof(tr));
1738         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1739                 return -EFAULT;
1740         mex64.inputdata = compat_ptr(mex32.inputdata);
1741         mex64.inputdatalength = mex32.inputdatalength;
1742         mex64.outputdata = compat_ptr(mex32.outputdata);
1743         mex64.outputdatalength = mex32.outputdatalength;
1744         mex64.b_key = compat_ptr(mex32.b_key);
1745         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1746         do {
1747                 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1748                 if (rc == -EAGAIN)
1749                         tr.again_counter++;
1750         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1751         /* on failure: retry once again after a requested rescan */
1752         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1753                 do {
1754                         rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1755                         if (rc == -EAGAIN)
1756                                 tr.again_counter++;
1757                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1758         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1759                 rc = -EIO;
1760         if (rc)
1761                 return rc;
1762         return put_user(mex64.outputdatalength,
1763                         &umex32->outputdatalength);
1764 }
1765
1766 struct compat_ica_rsa_modexpo_crt {
1767         compat_uptr_t   inputdata;
1768         unsigned int    inputdatalength;
1769         compat_uptr_t   outputdata;
1770         unsigned int    outputdatalength;
1771         compat_uptr_t   bp_key;
1772         compat_uptr_t   bq_key;
1773         compat_uptr_t   np_prime;
1774         compat_uptr_t   nq_prime;
1775         compat_uptr_t   u_mult_inv;
1776 };
1777
1778 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1779                                 unsigned int cmd, unsigned long arg)
1780 {
1781         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1782         struct compat_ica_rsa_modexpo_crt crt32;
1783         struct ica_rsa_modexpo_crt crt64;
1784         struct zcrypt_track tr;
1785         long rc;
1786
1787         memset(&tr, 0, sizeof(tr));
1788         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1789                 return -EFAULT;
1790         crt64.inputdata = compat_ptr(crt32.inputdata);
1791         crt64.inputdatalength = crt32.inputdatalength;
1792         crt64.outputdata = compat_ptr(crt32.outputdata);
1793         crt64.outputdatalength = crt32.outputdatalength;
1794         crt64.bp_key = compat_ptr(crt32.bp_key);
1795         crt64.bq_key = compat_ptr(crt32.bq_key);
1796         crt64.np_prime = compat_ptr(crt32.np_prime);
1797         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1798         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1799         do {
1800                 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1801                 if (rc == -EAGAIN)
1802                         tr.again_counter++;
1803         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1804         /* on failure: retry once again after a requested rescan */
1805         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1806                 do {
1807                         rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1808                         if (rc == -EAGAIN)
1809                                 tr.again_counter++;
1810                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1811         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1812                 rc = -EIO;
1813         if (rc)
1814                 return rc;
1815         return put_user(crt64.outputdatalength,
1816                         &ucrt32->outputdatalength);
1817 }
1818
1819 struct compat_ica_xcRB {
1820         unsigned short  agent_ID;
1821         unsigned int    user_defined;
1822         unsigned short  request_ID;
1823         unsigned int    request_control_blk_length;
1824         unsigned char   padding1[16 - sizeof(compat_uptr_t)];
1825         compat_uptr_t   request_control_blk_addr;
1826         unsigned int    request_data_length;
1827         char            padding2[16 - sizeof(compat_uptr_t)];
1828         compat_uptr_t   request_data_address;
1829         unsigned int    reply_control_blk_length;
1830         char            padding3[16 - sizeof(compat_uptr_t)];
1831         compat_uptr_t   reply_control_blk_addr;
1832         unsigned int    reply_data_length;
1833         char            padding4[16 - sizeof(compat_uptr_t)];
1834         compat_uptr_t   reply_data_addr;
1835         unsigned short  priority_window;
1836         unsigned int    status;
1837 } __packed;
1838
1839 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1840                          unsigned int cmd, unsigned long arg)
1841 {
1842         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1843         struct compat_ica_xcRB xcRB32;
1844         struct zcrypt_track tr;
1845         struct ica_xcRB xcRB64;
1846         long rc;
1847
1848         memset(&tr, 0, sizeof(tr));
1849         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1850                 return -EFAULT;
1851         xcRB64.agent_ID = xcRB32.agent_ID;
1852         xcRB64.user_defined = xcRB32.user_defined;
1853         xcRB64.request_ID = xcRB32.request_ID;
1854         xcRB64.request_control_blk_length =
1855                 xcRB32.request_control_blk_length;
1856         xcRB64.request_control_blk_addr =
1857                 compat_ptr(xcRB32.request_control_blk_addr);
1858         xcRB64.request_data_length =
1859                 xcRB32.request_data_length;
1860         xcRB64.request_data_address =
1861                 compat_ptr(xcRB32.request_data_address);
1862         xcRB64.reply_control_blk_length =
1863                 xcRB32.reply_control_blk_length;
1864         xcRB64.reply_control_blk_addr =
1865                 compat_ptr(xcRB32.reply_control_blk_addr);
1866         xcRB64.reply_data_length = xcRB32.reply_data_length;
1867         xcRB64.reply_data_addr =
1868                 compat_ptr(xcRB32.reply_data_addr);
1869         xcRB64.priority_window = xcRB32.priority_window;
1870         xcRB64.status = xcRB32.status;
1871         do {
1872                 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
1873                 if (rc == -EAGAIN)
1874                         tr.again_counter++;
1875         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1876         /* on failure: retry once again after a requested rescan */
1877         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1878                 do {
1879                         rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
1880                         if (rc == -EAGAIN)
1881                                 tr.again_counter++;
1882                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1883         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1884                 rc = -EIO;
1885         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1886         xcRB32.reply_data_length = xcRB64.reply_data_length;
1887         xcRB32.status = xcRB64.status;
1888         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1889                 return -EFAULT;
1890         return rc;
1891 }
1892
1893 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1894                          unsigned long arg)
1895 {
1896         int rc;
1897         struct ap_perms *perms =
1898                 (struct ap_perms *) filp->private_data;
1899
1900         rc = zcrypt_check_ioctl(perms, cmd);
1901         if (rc)
1902                 return rc;
1903
1904         if (cmd == ICARSAMODEXPO)
1905                 return trans_modexpo32(perms, filp, cmd, arg);
1906         if (cmd == ICARSACRT)
1907                 return trans_modexpo_crt32(perms, filp, cmd, arg);
1908         if (cmd == ZSECSENDCPRB)
1909                 return trans_xcRB32(perms, filp, cmd, arg);
1910         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1911 }
1912 #endif
1913
1914 /*
1915  * Misc device file operations.
1916  */
1917 static const struct file_operations zcrypt_fops = {
1918         .owner          = THIS_MODULE,
1919         .read           = zcrypt_read,
1920         .write          = zcrypt_write,
1921         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1922 #ifdef CONFIG_COMPAT
1923         .compat_ioctl   = zcrypt_compat_ioctl,
1924 #endif
1925         .open           = zcrypt_open,
1926         .release        = zcrypt_release,
1927         .llseek         = no_llseek,
1928 };
1929
1930 /*
1931  * Misc device.
1932  */
1933 static struct miscdevice zcrypt_misc_device = {
1934         .minor      = MISC_DYNAMIC_MINOR,
1935         .name       = "z90crypt",
1936         .fops       = &zcrypt_fops,
1937 };
1938
1939 static int zcrypt_rng_device_count;
1940 static u32 *zcrypt_rng_buffer;
1941 static int zcrypt_rng_buffer_index;
1942 static DEFINE_MUTEX(zcrypt_rng_mutex);
1943
1944 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1945 {
1946         int rc;
1947
1948         /*
1949          * We don't need locking here because the RNG API guarantees serialized
1950          * read method calls.
1951          */
1952         if (zcrypt_rng_buffer_index == 0) {
1953                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1954                 /* on failure: retry once again after a requested rescan */
1955                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1956                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1957                 if (rc < 0)
1958                         return -EIO;
1959                 zcrypt_rng_buffer_index = rc / sizeof(*data);
1960         }
1961         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1962         return sizeof(*data);
1963 }
1964
1965 static struct hwrng zcrypt_rng_dev = {
1966         .name           = "zcrypt",
1967         .data_read      = zcrypt_rng_data_read,
1968         .quality        = 990,
1969 };
1970
1971 int zcrypt_rng_device_add(void)
1972 {
1973         int rc = 0;
1974
1975         mutex_lock(&zcrypt_rng_mutex);
1976         if (zcrypt_rng_device_count == 0) {
1977                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1978                 if (!zcrypt_rng_buffer) {
1979                         rc = -ENOMEM;
1980                         goto out;
1981                 }
1982                 zcrypt_rng_buffer_index = 0;
1983                 if (!zcrypt_hwrng_seed)
1984                         zcrypt_rng_dev.quality = 0;
1985                 rc = hwrng_register(&zcrypt_rng_dev);
1986                 if (rc)
1987                         goto out_free;
1988                 zcrypt_rng_device_count = 1;
1989         } else
1990                 zcrypt_rng_device_count++;
1991         mutex_unlock(&zcrypt_rng_mutex);
1992         return 0;
1993
1994 out_free:
1995         free_page((unsigned long) zcrypt_rng_buffer);
1996 out:
1997         mutex_unlock(&zcrypt_rng_mutex);
1998         return rc;
1999 }
2000
2001 void zcrypt_rng_device_remove(void)
2002 {
2003         mutex_lock(&zcrypt_rng_mutex);
2004         zcrypt_rng_device_count--;
2005         if (zcrypt_rng_device_count == 0) {
2006                 hwrng_unregister(&zcrypt_rng_dev);
2007                 free_page((unsigned long) zcrypt_rng_buffer);
2008         }
2009         mutex_unlock(&zcrypt_rng_mutex);
2010 }
2011
2012 /*
2013  * Wait until the zcrypt api is operational.
2014  * The AP bus scan and the binding of ap devices to device drivers is
2015  * an asynchronous job. This function waits until these initial jobs
2016  * are done and so the zcrypt api should be ready to serve crypto
2017  * requests - if there are resources available. The function uses an
2018  * internal timeout of 60s. The very first caller will either wait for
2019  * ap bus bindings complete or the timeout happens. This state will be
2020  * remembered for further callers which will only be blocked until a
2021  * decision is made (timeout or bindings complete).
2022  * On timeout -ETIME is returned, on success the return value is 0.
2023  */
2024 int zcrypt_wait_api_operational(void)
2025 {
2026         static DEFINE_MUTEX(zcrypt_wait_api_lock);
2027         static int zcrypt_wait_api_state;
2028         int rc;
2029
2030         rc = mutex_lock_interruptible(&zcrypt_wait_api_lock);
2031         if (rc)
2032                 return rc;
2033
2034         switch (zcrypt_wait_api_state) {
2035         case 0:
2036                 /* initial state, invoke wait for the ap bus complete */
2037                 rc = ap_wait_init_apqn_bindings_complete(
2038                         msecs_to_jiffies(60 * 1000));
2039                 switch (rc) {
2040                 case 0:
2041                         /* ap bus bindings are complete */
2042                         zcrypt_wait_api_state = 1;
2043                         break;
2044                 case -EINTR:
2045                         /* interrupted, go back to caller */
2046                         break;
2047                 case -ETIME:
2048                         /* timeout */
2049                         ZCRYPT_DBF_WARN("%s ap_wait_init_apqn_bindings_complete()=ETIME\n",
2050                                         __func__);
2051                         zcrypt_wait_api_state = -ETIME;
2052                         break;
2053                 default:
2054                         /* other failure */
2055                         ZCRYPT_DBF_DBG("%s ap_wait_init_apqn_bindings_complete()=%d\n",
2056                                        __func__, rc);
2057                         break;
2058                 }
2059                 break;
2060         case 1:
2061                 /* a previous caller already found ap bus bindings complete */
2062                 rc = 0;
2063                 break;
2064         default:
2065                 /* a previous caller had timeout or other failure */
2066                 rc = zcrypt_wait_api_state;
2067                 break;
2068         }
2069
2070         mutex_unlock(&zcrypt_wait_api_lock);
2071
2072         return rc;
2073 }
2074 EXPORT_SYMBOL(zcrypt_wait_api_operational);
2075
2076 int __init zcrypt_debug_init(void)
2077 {
2078         zcrypt_dbf_info = debug_register("zcrypt", 2, 1,
2079                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
2080         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
2081         debug_set_level(zcrypt_dbf_info, DBF_ERR);
2082
2083         return 0;
2084 }
2085
2086 void zcrypt_debug_exit(void)
2087 {
2088         debug_unregister(zcrypt_dbf_info);
2089 }
2090
2091 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2092
2093 static int __init zcdn_init(void)
2094 {
2095         int rc;
2096
2097         /* create a new class 'zcrypt' */
2098         zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
2099         if (IS_ERR(zcrypt_class)) {
2100                 rc = PTR_ERR(zcrypt_class);
2101                 goto out_class_create_failed;
2102         }
2103         zcrypt_class->dev_release = zcdn_device_release;
2104
2105         /* alloc device minor range */
2106         rc = alloc_chrdev_region(&zcrypt_devt,
2107                                  0, ZCRYPT_MAX_MINOR_NODES,
2108                                  ZCRYPT_NAME);
2109         if (rc)
2110                 goto out_alloc_chrdev_failed;
2111
2112         cdev_init(&zcrypt_cdev, &zcrypt_fops);
2113         zcrypt_cdev.owner = THIS_MODULE;
2114         rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2115         if (rc)
2116                 goto out_cdev_add_failed;
2117
2118         /* need some class specific sysfs attributes */
2119         rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
2120         if (rc)
2121                 goto out_class_create_file_1_failed;
2122         rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
2123         if (rc)
2124                 goto out_class_create_file_2_failed;
2125
2126         return 0;
2127
2128 out_class_create_file_2_failed:
2129         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2130 out_class_create_file_1_failed:
2131         cdev_del(&zcrypt_cdev);
2132 out_cdev_add_failed:
2133         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2134 out_alloc_chrdev_failed:
2135         class_destroy(zcrypt_class);
2136 out_class_create_failed:
2137         return rc;
2138 }
2139
2140 static void zcdn_exit(void)
2141 {
2142         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2143         class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
2144         zcdn_destroy_all();
2145         cdev_del(&zcrypt_cdev);
2146         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2147         class_destroy(zcrypt_class);
2148 }
2149
2150 #endif
2151
2152 /*
2153  * zcrypt_api_init(): Module initialization.
2154  *
2155  * The module initialization code.
2156  */
2157 int __init zcrypt_api_init(void)
2158 {
2159         int rc;
2160
2161         rc = zcrypt_debug_init();
2162         if (rc)
2163                 goto out;
2164
2165 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2166         rc = zcdn_init();
2167         if (rc)
2168                 goto out;
2169 #endif
2170
2171         /* Register the request sprayer. */
2172         rc = misc_register(&zcrypt_misc_device);
2173         if (rc < 0)
2174                 goto out_misc_register_failed;
2175
2176         zcrypt_msgtype6_init();
2177         zcrypt_msgtype50_init();
2178
2179         return 0;
2180
2181 out_misc_register_failed:
2182 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2183         zcdn_exit();
2184 #endif
2185         zcrypt_debug_exit();
2186 out:
2187         return rc;
2188 }
2189
2190 /*
2191  * zcrypt_api_exit(): Module termination.
2192  *
2193  * The module termination code.
2194  */
2195 void __exit zcrypt_api_exit(void)
2196 {
2197 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2198         zcdn_exit();
2199 #endif
2200         misc_deregister(&zcrypt_misc_device);
2201         zcrypt_msgtype6_exit();
2202         zcrypt_msgtype50_exit();
2203         zcrypt_ccamisc_exit();
2204         zcrypt_ep11misc_exit();
2205         zcrypt_debug_exit();
2206 }
2207
2208 module_init(zcrypt_api_init);
2209 module_exit(zcrypt_api_exit);