drivers/s390/crypto/zcrypt_api.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *  Copyright IBM Corp. 2001, 2018
   4  *  Author(s): Robert Burroughs
   5  *             Eric Rossman (edrossma@us.ibm.com)
   6  *             Cornelia Huck <cornelia.huck@de.ibm.com>
   7  *
   8  *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
   9  *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
  10  *                                Ralph Wuerthner <rwuerthn@de.ibm.com>
  11  *  MSGTYPE restruct:             Holger Dengler <hd@linux.vnet.ibm.com>
  12  *  Multiple device nodes: Harald Freudenberger <freude@linux.ibm.com>
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/init.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/miscdevice.h>
  19 #include <linux/fs.h>
  20 #include <linux/compat.h>
  21 #include <linux/slab.h>
  22 #include <linux/atomic.h>
  23 #include <linux/uaccess.h>
  24 #include <linux/hw_random.h>
  25 #include <linux/debugfs.h>
  26 #include <linux/cdev.h>
  27 #include <linux/ctype.h>
  28 #include <linux/capability.h>
  29 #include <asm/debug.h>
  30
  31 #define CREATE_TRACE_POINTS
  32 #include <asm/trace/zcrypt.h>
  33
  34 #include "zcrypt_api.h"
  35 #include "zcrypt_debug.h"
  36
  37 #include "zcrypt_msgtype6.h"
  38 #include "zcrypt_msgtype50.h"
  39 #include "zcrypt_ccamisc.h"
  40 #include "zcrypt_ep11misc.h"
  41
  42 /*
  43  * Module description.
  44  */
  45 MODULE_AUTHOR("IBM Corporation");
  46 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
  47                    "Copyright IBM Corp. 2001, 2012");
  48 MODULE_LICENSE("GPL");
  49
  50 /*
  51  * zcrypt tracepoint functions
  52  */
  53 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
  54 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
  55
  56 DEFINE_SPINLOCK(zcrypt_list_lock);
  57 LIST_HEAD(zcrypt_card_list);
  58
  59 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
  60 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
  61
  62 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
  63 EXPORT_SYMBOL(zcrypt_rescan_req);
  64
  65 static LIST_HEAD(zcrypt_ops_list);
  66
  67 /* Zcrypt related debug feature stuff. */
  68 debug_info_t *zcrypt_dbf_info;
  69
  70 /*
  71  * Process a rescan of the transport layer.
  72  *
  73  * Returns 1, if the rescan has been processed, otherwise 0.
  74  */
  75 static inline int zcrypt_process_rescan(void)
  76 {
  77         if (atomic_read(&zcrypt_rescan_req)) {
  78                 atomic_set(&zcrypt_rescan_req, 0);
  79                 atomic_inc(&zcrypt_rescan_count);
  80                 ap_bus_force_rescan();
  81                 ZCRYPT_DBF_INFO("%s rescan count=%07d\n", __func__,
  82                                 atomic_inc_return(&zcrypt_rescan_count));
  83                 return 1;
  84         }
  85         return 0;
  86 }
  87
  88 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
  89 {
  90         list_add_tail(&zops->list, &zcrypt_ops_list);
  91 }
  92
  93 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
  94 {
  95         list_del_init(&zops->list);
  96 }
  97
  98 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
  99 {
 100         struct zcrypt_ops *zops;
 101
 102         list_for_each_entry(zops, &zcrypt_ops_list, list)
 103                 if (zops->variant == variant &&
 104                     (!strncmp(zops->name, name, sizeof(zops->name))))
 105                         return zops;
 106         return NULL;
 107 }
 108 EXPORT_SYMBOL(zcrypt_msgtype);
 109
 110 /*
 111  * Multi device nodes extension functions.
 112  */
 113
 114 struct zcdn_device;
 115
 116 static struct class *zcrypt_class;
 117 static dev_t zcrypt_devt;
 118 static struct cdev zcrypt_cdev;
 119
 120 struct zcdn_device {
 121         struct device device;
 122         struct ap_perms perms;
 123 };
 124
 125 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
 126
 127 #define ZCDN_MAX_NAME 32
 128
 129 static int zcdn_create(const char *name);
 130 static int zcdn_destroy(const char *name);
 131
 132 /*
 133  * Find zcdn device by name.
 134  * Returns reference to the zcdn device which needs to be released
 135  * with put_device() after use.
 136  */
 137 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
 138 {
 139         struct device *dev = class_find_device_by_name(zcrypt_class, name);
 140
 141         return dev ? to_zcdn_dev(dev) : NULL;
 142 }
 143
 144 /*
 145  * Find zcdn device by devt value.
 146  * Returns reference to the zcdn device which needs to be released
 147  * with put_device() after use.
 148  */
 149 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
 150 {
 151         struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
 152
 153         return dev ? to_zcdn_dev(dev) : NULL;
 154 }
 155
 156 static ssize_t ioctlmask_show(struct device *dev,
 157                               struct device_attribute *attr,
 158                               char *buf)
 159 {
 160         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 161         int i, n;
 162
 163         if (mutex_lock_interruptible(&ap_perms_mutex))
 164                 return -ERESTARTSYS;
 165
 166         n = sysfs_emit(buf, "0x");
 167         for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
 168                 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.ioctlm[i]);
 169         n += sysfs_emit_at(buf, n, "\n");
 170
 171         mutex_unlock(&ap_perms_mutex);
 172
 173         return n;
 174 }
 175
 176 static ssize_t ioctlmask_store(struct device *dev,
 177                                struct device_attribute *attr,
 178                                const char *buf, size_t count)
 179 {
 180         int rc;
 181         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 182
 183         rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
 184                                AP_IOCTLS, &ap_perms_mutex);
 185         if (rc)
 186                 return rc;
 187
 188         return count;
 189 }
 190
 191 static DEVICE_ATTR_RW(ioctlmask);
 192
 193 static ssize_t apmask_show(struct device *dev,
 194                            struct device_attribute *attr,
 195                            char *buf)
 196 {
 197         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 198         int i, n;
 199
 200         if (mutex_lock_interruptible(&ap_perms_mutex))
 201                 return -ERESTARTSYS;
 202
 203         n = sysfs_emit(buf, "0x");
 204         for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
 205                 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.apm[i]);
 206         n += sysfs_emit_at(buf, n, "\n");
 207
 208         mutex_unlock(&ap_perms_mutex);
 209
 210         return n;
 211 }
 212
 213 static ssize_t apmask_store(struct device *dev,
 214                             struct device_attribute *attr,
 215                             const char *buf, size_t count)
 216 {
 217         int rc;
 218         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 219
 220         rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
 221                                AP_DEVICES, &ap_perms_mutex);
 222         if (rc)
 223                 return rc;
 224
 225         return count;
 226 }
 227
 228 static DEVICE_ATTR_RW(apmask);
 229
 230 static ssize_t aqmask_show(struct device *dev,
 231                            struct device_attribute *attr,
 232                            char *buf)
 233 {
 234         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 235         int i, n;
 236
 237         if (mutex_lock_interruptible(&ap_perms_mutex))
 238                 return -ERESTARTSYS;
 239
 240         n = sysfs_emit(buf, "0x");
 241         for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
 242                 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.aqm[i]);
 243         n += sysfs_emit_at(buf, n, "\n");
 244
 245         mutex_unlock(&ap_perms_mutex);
 246
 247         return n;
 248 }
 249
 250 static ssize_t aqmask_store(struct device *dev,
 251                             struct device_attribute *attr,
 252                             const char *buf, size_t count)
 253 {
 254         int rc;
 255         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 256
 257         rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
 258                                AP_DOMAINS, &ap_perms_mutex);
 259         if (rc)
 260                 return rc;
 261
 262         return count;
 263 }
 264
 265 static DEVICE_ATTR_RW(aqmask);
 266
 267 static ssize_t admask_show(struct device *dev,
 268                            struct device_attribute *attr,
 269                            char *buf)
 270 {
 271         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 272         int i, n;
 273
 274         if (mutex_lock_interruptible(&ap_perms_mutex))
 275                 return -ERESTARTSYS;
 276
 277         n = sysfs_emit(buf, "0x");
 278         for (i = 0; i < sizeof(zcdndev->perms.adm) / sizeof(long); i++)
 279                 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.adm[i]);
 280         n += sysfs_emit_at(buf, n, "\n");
 281
 282         mutex_unlock(&ap_perms_mutex);
 283
 284         return n;
 285 }
 286
 287 static ssize_t admask_store(struct device *dev,
 288                             struct device_attribute *attr,
 289                             const char *buf, size_t count)
 290 {
 291         int rc;
 292         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 293
 294         rc = ap_parse_mask_str(buf, zcdndev->perms.adm,
 295                                AP_DOMAINS, &ap_perms_mutex);
 296         if (rc)
 297                 return rc;
 298
 299         return count;
 300 }
 301
 302 static DEVICE_ATTR_RW(admask);
 303
 304 static struct attribute *zcdn_dev_attrs[] = {
 305         &dev_attr_ioctlmask.attr,
 306         &dev_attr_apmask.attr,
 307         &dev_attr_aqmask.attr,
 308         &dev_attr_admask.attr,
 309         NULL
 310 };
 311
 312 static struct attribute_group zcdn_dev_attr_group = {
 313         .attrs = zcdn_dev_attrs
 314 };
 315
 316 static const struct attribute_group *zcdn_dev_attr_groups[] = {
 317         &zcdn_dev_attr_group,
 318         NULL
 319 };
 320
 321 static ssize_t zcdn_create_store(const struct class *class,
 322                                  const struct class_attribute *attr,
 323                                  const char *buf, size_t count)
 324 {
 325         int rc;
 326         char name[ZCDN_MAX_NAME];
 327
 328         strscpy(name, skip_spaces(buf), sizeof(name));
 329
 330         rc = zcdn_create(strim(name));
 331
 332         return rc ? rc : count;
 333 }
 334
 335 static const struct class_attribute class_attr_zcdn_create =
 336         __ATTR(create, 0600, NULL, zcdn_create_store);
 337
 338 static ssize_t zcdn_destroy_store(const struct class *class,
 339                                   const struct class_attribute *attr,
 340                                   const char *buf, size_t count)
 341 {
 342         int rc;
 343         char name[ZCDN_MAX_NAME];
 344
 345         strscpy(name, skip_spaces(buf), sizeof(name));
 346
 347         rc = zcdn_destroy(strim(name));
 348
 349         return rc ? rc : count;
 350 }
 351
 352 static const struct class_attribute class_attr_zcdn_destroy =
 353         __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
 354
 355 static void zcdn_device_release(struct device *dev)
 356 {
 357         struct zcdn_device *zcdndev = to_zcdn_dev(dev);
 358
 359         ZCRYPT_DBF_INFO("%s releasing zcdn device %d:%d\n",
 360                         __func__, MAJOR(dev->devt), MINOR(dev->devt));
 361
 362         kfree(zcdndev);
 363 }
 364
 365 static int zcdn_create(const char *name)
 366 {
 367         dev_t devt;
 368         int i, rc = 0;
 369         struct zcdn_device *zcdndev;
 370
 371         if (mutex_lock_interruptible(&ap_perms_mutex))
 372                 return -ERESTARTSYS;
 373
 374         /* check if device node with this name already exists */
 375         if (name[0]) {
 376                 zcdndev = find_zcdndev_by_name(name);
 377                 if (zcdndev) {
 378                         put_device(&zcdndev->device);
 379                         rc = -EEXIST;
 380                         goto unlockout;
 381                 }
 382         }
 383
 384         /* find an unused minor number */
 385         for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
 386                 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
 387                 zcdndev = find_zcdndev_by_devt(devt);
 388                 if (zcdndev)
 389                         put_device(&zcdndev->device);
 390                 else
 391                         break;
 392         }
 393         if (i == ZCRYPT_MAX_MINOR_NODES) {
 394                 rc = -ENOSPC;
 395                 goto unlockout;
 396         }
 397
 398         /* alloc and prepare a new zcdn device */
 399         zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
 400         if (!zcdndev) {
 401                 rc = -ENOMEM;
 402                 goto unlockout;
 403         }
 404         zcdndev->device.release = zcdn_device_release;
 405         zcdndev->device.class = zcrypt_class;
 406         zcdndev->device.devt = devt;
 407         zcdndev->device.groups = zcdn_dev_attr_groups;
 408         if (name[0])
 409                 rc = dev_set_name(&zcdndev->device, "%s", name);
 410         else
 411                 rc = dev_set_name(&zcdndev->device, ZCRYPT_NAME "_%d", (int)MINOR(devt));
 412         if (rc) {
 413                 kfree(zcdndev);
 414                 goto unlockout;
 415         }
 416         rc = device_register(&zcdndev->device);
 417         if (rc) {
 418                 put_device(&zcdndev->device);
 419                 goto unlockout;
 420         }
 421
 422         ZCRYPT_DBF_INFO("%s created zcdn device %d:%d\n",
 423                         __func__, MAJOR(devt), MINOR(devt));
 424
 425 unlockout:
 426         mutex_unlock(&ap_perms_mutex);
 427         return rc;
 428 }
 429
 430 static int zcdn_destroy(const char *name)
 431 {
 432         int rc = 0;
 433         struct zcdn_device *zcdndev;
 434
 435         if (mutex_lock_interruptible(&ap_perms_mutex))
 436                 return -ERESTARTSYS;
 437
 438         /* try to find this zcdn device */
 439         zcdndev = find_zcdndev_by_name(name);
 440         if (!zcdndev) {
 441                 rc = -ENOENT;
 442                 goto unlockout;
 443         }
 444
 445         /*
 446          * The zcdn device is not hard destroyed. It is subject to
 447          * reference counting and thus just needs to be unregistered.
 448          */
 449         put_device(&zcdndev->device);
 450         device_unregister(&zcdndev->device);
 451
 452 unlockout:
 453         mutex_unlock(&ap_perms_mutex);
 454         return rc;
 455 }
 456
 457 static void zcdn_destroy_all(void)
 458 {
 459         int i;
 460         dev_t devt;
 461         struct zcdn_device *zcdndev;
 462
 463         mutex_lock(&ap_perms_mutex);
 464         for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
 465                 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
 466                 zcdndev = find_zcdndev_by_devt(devt);
 467                 if (zcdndev) {
 468                         put_device(&zcdndev->device);
 469                         device_unregister(&zcdndev->device);
 470                 }
 471         }
 472         mutex_unlock(&ap_perms_mutex);
 473 }
 474
 475 /*
 476  * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
 477  *
 478  * This function is not supported beyond zcrypt 1.3.1.
 479  */
 480 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
 481                            size_t count, loff_t *f_pos)
 482 {
 483         return -EPERM;
 484 }
 485
 486 /*
 487  * zcrypt_write(): Not allowed.
 488  *
 489  * Write is not allowed
 490  */
 491 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
 492                             size_t count, loff_t *f_pos)
 493 {
 494         return -EPERM;
 495 }
 496
 497 /*
 498  * zcrypt_open(): Count number of users.
 499  *
 500  * Device open function to count number of users.
 501  */
 502 static int zcrypt_open(struct inode *inode, struct file *filp)
 503 {
 504         struct ap_perms *perms = &ap_perms;
 505
 506         if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 507                 struct zcdn_device *zcdndev;
 508
 509                 if (mutex_lock_interruptible(&ap_perms_mutex))
 510                         return -ERESTARTSYS;
 511                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 512                 /* find returns a reference, no get_device() needed */
 513                 mutex_unlock(&ap_perms_mutex);
 514                 if (zcdndev)
 515                         perms = &zcdndev->perms;
 516         }
 517         filp->private_data = (void *)perms;
 518
 519         atomic_inc(&zcrypt_open_count);
 520         return stream_open(inode, filp);
 521 }
 522
 523 /*
 524  * zcrypt_release(): Count number of users.
 525  *
 526  * Device close function to count number of users.
 527  */
 528 static int zcrypt_release(struct inode *inode, struct file *filp)
 529 {
 530         if (filp->f_inode->i_cdev == &zcrypt_cdev) {
 531                 struct zcdn_device *zcdndev;
 532
 533                 mutex_lock(&ap_perms_mutex);
 534                 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
 535                 mutex_unlock(&ap_perms_mutex);
 536                 if (zcdndev) {
 537                         /* 2 puts here: one for find, one for open */
 538                         put_device(&zcdndev->device);
 539                         put_device(&zcdndev->device);
 540                 }
 541         }
 542
 543         atomic_dec(&zcrypt_open_count);
 544         return 0;
 545 }
 546
 547 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
 548                                      unsigned int cmd)
 549 {
 550         int rc = -EPERM;
 551         int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
 552
 553         if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
 554                 if (test_bit_inv(ioctlnr, perms->ioctlm))
 555                         rc = 0;
 556         }
 557
 558         if (rc)
 559                 ZCRYPT_DBF_WARN("%s ioctl check failed: ioctlnr=0x%04x rc=%d\n",
 560                                 __func__, ioctlnr, rc);
 561
 562         return rc;
 563 }
 564
 565 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
 566 {
 567         return test_bit_inv(card, perms->apm) ? true : false;
 568 }
 569
 570 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
 571 {
 572         return test_bit_inv(queue, perms->aqm) ? true : false;
 573 }
 574
 575 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
 576                                                      struct zcrypt_queue *zq,
 577                                                      struct module **pmod,
 578                                                      unsigned int weight)
 579 {
 580         if (!zq || !try_module_get(zq->queue->ap_dev.device.driver->owner))
 581                 return NULL;
 582         zcrypt_card_get(zc);
 583         zcrypt_queue_get(zq);
 584         get_device(&zq->queue->ap_dev.device);
 585         atomic_add(weight, &zc->load);
 586         atomic_add(weight, &zq->load);
 587         zq->request_count++;
 588         *pmod = zq->queue->ap_dev.device.driver->owner;
 589         return zq;
 590 }
 591
 592 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
 593                                      struct zcrypt_queue *zq,
 594                                      struct module *mod,
 595                                      unsigned int weight)
 596 {
 597         zq->request_count--;
 598         atomic_sub(weight, &zc->load);
 599         atomic_sub(weight, &zq->load);
 600         put_device(&zq->queue->ap_dev.device);
 601         zcrypt_queue_put(zq);
 602         zcrypt_card_put(zc);
 603         module_put(mod);
 604 }
 605
 606 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
 607                                        struct zcrypt_card *pref_zc,
 608                                        unsigned int weight,
 609                                        unsigned int pref_weight)
 610 {
 611         if (!pref_zc)
 612                 return true;
 613         weight += atomic_read(&zc->load);
 614         pref_weight += atomic_read(&pref_zc->load);
 615         if (weight == pref_weight)
 616                 return atomic64_read(&zc->card->total_request_count) <
 617                         atomic64_read(&pref_zc->card->total_request_count);
 618         return weight < pref_weight;
 619 }
 620
 621 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
 622                                         struct zcrypt_queue *pref_zq,
 623                                         unsigned int weight,
 624                                         unsigned int pref_weight)
 625 {
 626         if (!pref_zq)
 627                 return true;
 628         weight += atomic_read(&zq->load);
 629         pref_weight += atomic_read(&pref_zq->load);
 630         if (weight == pref_weight)
 631                 return zq->queue->total_request_count <
 632                         pref_zq->queue->total_request_count;
 633         return weight < pref_weight;
 634 }
 635
 636 /*
 637  * zcrypt ioctls.
 638  */
 639 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
 640                                struct zcrypt_track *tr,
 641                                struct ica_rsa_modexpo *mex)
 642 {
 643         struct zcrypt_card *zc, *pref_zc;
 644         struct zcrypt_queue *zq, *pref_zq;
 645         struct ap_message ap_msg;
 646         unsigned int wgt = 0, pref_wgt = 0;
 647         unsigned int func_code;
 648         int cpen, qpen, qid = 0, rc = -ENODEV;
 649         struct module *mod;
 650
 651         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
 652
 653         ap_init_message(&ap_msg);
 654
 655         if (mex->outputdatalength < mex->inputdatalength) {
 656                 func_code = 0;
 657                 rc = -EINVAL;
 658                 goto out;
 659         }
 660
 661         /*
 662          * As long as outputdatalength is big enough, we can set the
 663          * outputdatalength equal to the inputdatalength, since that is the
 664          * number of bytes we will copy in any case
 665          */
 666         mex->outputdatalength = mex->inputdatalength;
 667
 668         rc = get_rsa_modex_fc(mex, &func_code);
 669         if (rc)
 670                 goto out;
 671
 672         pref_zc = NULL;
 673         pref_zq = NULL;
 674         spin_lock(&zcrypt_list_lock);
 675         for_each_zcrypt_card(zc) {
 676                 /* Check for usable accelerator or CCA card */
 677                 if (!zc->online || !zc->card->config || zc->card->chkstop ||
 678                     !(zc->card->hwinfo.accel || zc->card->hwinfo.cca))
 679                         continue;
 680                 /* Check for size limits */
 681                 if (zc->min_mod_size > mex->inputdatalength ||
 682                     zc->max_mod_size < mex->inputdatalength)
 683                         continue;
 684                 /* check if device node has admission for this card */
 685                 if (!zcrypt_check_card(perms, zc->card->id))
 686                         continue;
 687                 /* get weight index of the card device  */
 688                 wgt = zc->speed_rating[func_code];
 689                 /* penalty if this msg was previously sent via this card */
 690                 cpen = (tr && tr->again_counter && tr->last_qid &&
 691                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
 692                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
 693                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 694                         continue;
 695                 for_each_zcrypt_queue(zq, zc) {
 696                         /* check if device is usable and eligible */
 697                         if (!zq->online || !zq->ops->rsa_modexpo ||
 698                             !ap_queue_usable(zq->queue))
 699                                 continue;
 700                         /* check if device node has admission for this queue */
 701                         if (!zcrypt_check_queue(perms,
 702                                                 AP_QID_QUEUE(zq->queue->qid)))
 703                                 continue;
 704                         /* penalty if the msg was previously sent at this qid */
 705                         qpen = (tr && tr->again_counter && tr->last_qid &&
 706                                 tr->last_qid == zq->queue->qid) ?
 707                                 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
 708                         if (!zcrypt_queue_compare(zq, pref_zq,
 709                                                   wgt + cpen + qpen, pref_wgt))
 710                                 continue;
 711                         pref_zc = zc;
 712                         pref_zq = zq;
 713                         pref_wgt = wgt + cpen + qpen;
 714                 }
 715         }
 716         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
 717         spin_unlock(&zcrypt_list_lock);
 718
 719         if (!pref_zq) {
 720                 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
 721                                __func__);
 722                 rc = -ENODEV;
 723                 goto out;
 724         }
 725
 726         qid = pref_zq->queue->qid;
 727         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
 728
 729         spin_lock(&zcrypt_list_lock);
 730         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 731         spin_unlock(&zcrypt_list_lock);
 732
 733 out:
 734         ap_release_message(&ap_msg);
 735         if (tr) {
 736                 tr->last_rc = rc;
 737                 tr->last_qid = qid;
 738         }
 739         trace_s390_zcrypt_rep(mex, func_code, rc,
 740                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 741         return rc;
 742 }
 743
 744 static long zcrypt_rsa_crt(struct ap_perms *perms,
 745                            struct zcrypt_track *tr,
 746                            struct ica_rsa_modexpo_crt *crt)
 747 {
 748         struct zcrypt_card *zc, *pref_zc;
 749         struct zcrypt_queue *zq, *pref_zq;
 750         struct ap_message ap_msg;
 751         unsigned int wgt = 0, pref_wgt = 0;
 752         unsigned int func_code;
 753         int cpen, qpen, qid = 0, rc = -ENODEV;
 754         struct module *mod;
 755
 756         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
 757
 758         ap_init_message(&ap_msg);
 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 usable accelerator or CCA card */
 782                 if (!zc->online || !zc->card->config || zc->card->chkstop ||
 783                     !(zc->card->hwinfo.accel || zc->card->hwinfo.cca))
 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 usable and eligible */
 802                         if (!zq->online || !zq->ops->rsa_modexpo_crt ||
 803                             !ap_queue_usable(zq->queue))
 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                 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
 826                                __func__);
 827                 rc = -ENODEV;
 828                 goto out;
 829         }
 830
 831         qid = pref_zq->queue->qid;
 832         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
 833
 834         spin_lock(&zcrypt_list_lock);
 835         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 836         spin_unlock(&zcrypt_list_lock);
 837
 838 out:
 839         ap_release_message(&ap_msg);
 840         if (tr) {
 841                 tr->last_rc = rc;
 842                 tr->last_qid = qid;
 843         }
 844         trace_s390_zcrypt_rep(crt, func_code, rc,
 845                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 846         return rc;
 847 }
 848
 849 static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
 850                               struct zcrypt_track *tr,
 851                               struct ica_xcRB *xcrb)
 852 {
 853         struct zcrypt_card *zc, *pref_zc;
 854         struct zcrypt_queue *zq, *pref_zq;
 855         struct ap_message ap_msg;
 856         unsigned int wgt = 0, pref_wgt = 0;
 857         unsigned int func_code;
 858         unsigned short *domain, tdom;
 859         int cpen, qpen, qid = 0, rc = -ENODEV;
 860         struct module *mod;
 861
 862         trace_s390_zcrypt_req(xcrb, TB_ZSECSENDCPRB);
 863
 864         xcrb->status = 0;
 865         ap_init_message(&ap_msg);
 866
 867         rc = prep_cca_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
 868         if (rc)
 869                 goto out;
 870
 871         tdom = *domain;
 872         if (perms != &ap_perms && tdom < AP_DOMAINS) {
 873                 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
 874                         if (!test_bit_inv(tdom, perms->adm)) {
 875                                 rc = -ENODEV;
 876                                 goto out;
 877                         }
 878                 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
 879                         rc = -EOPNOTSUPP;
 880                         goto out;
 881                 }
 882         }
 883         /*
 884          * If a valid target domain is set and this domain is NOT a usage
 885          * domain but a control only domain, autoselect target domain.
 886          */
 887         if (tdom < AP_DOMAINS &&
 888             !ap_test_config_usage_domain(tdom) &&
 889             ap_test_config_ctrl_domain(tdom))
 890                 tdom = AUTOSEL_DOM;
 891
 892         pref_zc = NULL;
 893         pref_zq = NULL;
 894         spin_lock(&zcrypt_list_lock);
 895         for_each_zcrypt_card(zc) {
 896                 /* Check for usable CCA card */
 897                 if (!zc->online || !zc->card->config || zc->card->chkstop ||
 898                     !zc->card->hwinfo.cca)
 899                         continue;
 900                 /* Check for user selected CCA card */
 901                 if (xcrb->user_defined != AUTOSELECT &&
 902                     xcrb->user_defined != zc->card->id)
 903                         continue;
 904                 /* check if request size exceeds card max msg size */
 905                 if (ap_msg.len > zc->card->maxmsgsize)
 906                         continue;
 907                 /* check if device node has admission for this card */
 908                 if (!zcrypt_check_card(perms, zc->card->id))
 909                         continue;
 910                 /* get weight index of the card device  */
 911                 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 912                 /* penalty if this msg was previously sent via this card */
 913                 cpen = (tr && tr->again_counter && tr->last_qid &&
 914                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
 915                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
 916                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 917                         continue;
 918                 for_each_zcrypt_queue(zq, zc) {
 919                         /* check for device usable and eligible */
 920                         if (!zq->online || !zq->ops->send_cprb ||
 921                             !ap_queue_usable(zq->queue) ||
 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                 ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n",
 946                                __func__, xcrb->user_defined, *domain);
 947                 rc = -ENODEV;
 948                 goto out;
 949         }
 950
 951         /* in case of auto select, provide the correct domain */
 952         qid = pref_zq->queue->qid;
 953         if (*domain == AUTOSEL_DOM)
 954                 *domain = AP_QID_QUEUE(qid);
 955
 956         rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcrb, &ap_msg);
 957
 958         spin_lock(&zcrypt_list_lock);
 959         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
 960         spin_unlock(&zcrypt_list_lock);
 961
 962 out:
 963         ap_release_message(&ap_msg);
 964         if (tr) {
 965                 tr->last_rc = rc;
 966                 tr->last_qid = qid;
 967         }
 968         trace_s390_zcrypt_rep(xcrb, func_code, rc,
 969                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 970         return rc;
 971 }
 972
 973 long zcrypt_send_cprb(struct ica_xcRB *xcrb)
 974 {
 975         return _zcrypt_send_cprb(false, &ap_perms, NULL, xcrb);
 976 }
 977 EXPORT_SYMBOL(zcrypt_send_cprb);
 978
 979 static bool is_desired_ep11_card(unsigned int dev_id,
 980                                  unsigned short target_num,
 981                                  struct ep11_target_dev *targets)
 982 {
 983         while (target_num-- > 0) {
 984                 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
 985                         return true;
 986                 targets++;
 987         }
 988         return false;
 989 }
 990
 991 static bool is_desired_ep11_queue(unsigned int dev_qid,
 992                                   unsigned short target_num,
 993                                   struct ep11_target_dev *targets)
 994 {
 995         int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
 996
 997         while (target_num-- > 0) {
 998                 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
 999                     (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
1000                         return true;
1001                 targets++;
1002         }
1003         return false;
1004 }
1005
1006 static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
1007                                    struct zcrypt_track *tr,
1008                                    struct ep11_urb *xcrb)
1009 {
1010         struct zcrypt_card *zc, *pref_zc;
1011         struct zcrypt_queue *zq, *pref_zq;
1012         struct ep11_target_dev *targets;
1013         unsigned short target_num;
1014         unsigned int wgt = 0, pref_wgt = 0;
1015         unsigned int func_code, domain;
1016         struct ap_message ap_msg;
1017         int cpen, qpen, qid = 0, rc = -ENODEV;
1018         struct module *mod;
1019
1020         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
1021
1022         ap_init_message(&ap_msg);
1023
1024         target_num = (unsigned short)xcrb->targets_num;
1025
1026         /* empty list indicates autoselect (all available targets) */
1027         targets = NULL;
1028         if (target_num != 0) {
1029                 struct ep11_target_dev __user *uptr;
1030
1031                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
1032                 if (!targets) {
1033                         func_code = 0;
1034                         rc = -ENOMEM;
1035                         goto out;
1036                 }
1037
1038                 uptr = (struct ep11_target_dev __force __user *)xcrb->targets;
1039                 if (z_copy_from_user(userspace, targets, uptr,
1040                                      target_num * sizeof(*targets))) {
1041                         func_code = 0;
1042                         rc = -EFAULT;
1043                         goto out_free;
1044                 }
1045         }
1046
1047         rc = prep_ep11_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
1048         if (rc)
1049                 goto out_free;
1050
1051         if (perms != &ap_perms && domain < AUTOSEL_DOM) {
1052                 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
1053                         if (!test_bit_inv(domain, perms->adm)) {
1054                                 rc = -ENODEV;
1055                                 goto out_free;
1056                         }
1057                 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
1058                         rc = -EOPNOTSUPP;
1059                         goto out_free;
1060                 }
1061         }
1062
1063         pref_zc = NULL;
1064         pref_zq = NULL;
1065         spin_lock(&zcrypt_list_lock);
1066         for_each_zcrypt_card(zc) {
1067                 /* Check for usable EP11 card */
1068                 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1069                     !zc->card->hwinfo.ep11)
1070                         continue;
1071                 /* Check for user selected EP11 card */
1072                 if (targets &&
1073                     !is_desired_ep11_card(zc->card->id, target_num, targets))
1074                         continue;
1075                 /* check if request size exceeds card max msg size */
1076                 if (ap_msg.len > zc->card->maxmsgsize)
1077                         continue;
1078                 /* check if device node has admission for this card */
1079                 if (!zcrypt_check_card(perms, zc->card->id))
1080                         continue;
1081                 /* get weight index of the card device  */
1082                 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1083                 /* penalty if this msg was previously sent via this card */
1084                 cpen = (tr && tr->again_counter && tr->last_qid &&
1085                         AP_QID_CARD(tr->last_qid) == zc->card->id) ?
1086                         TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
1087                 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
1088                         continue;
1089                 for_each_zcrypt_queue(zq, zc) {
1090                         /* check if device is usable and eligible */
1091                         if (!zq->online || !zq->ops->send_ep11_cprb ||
1092                             !ap_queue_usable(zq->queue) ||
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                 if (targets && target_num == 1) {
1118                         ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n",
1119                                        __func__, (int)targets->ap_id,
1120                                        (int)targets->dom_id);
1121                 } else if (targets) {
1122                         ZCRYPT_DBF_DBG("%s no match for %d target addrs => ENODEV\n",
1123                                        __func__, (int)target_num);
1124                 } else {
1125                         ZCRYPT_DBF_DBG("%s no match for address ff.ffff => ENODEV\n",
1126                                        __func__);
1127                 }
1128                 rc = -ENODEV;
1129                 goto out_free;
1130         }
1131
1132         qid = pref_zq->queue->qid;
1133         rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
1134
1135         spin_lock(&zcrypt_list_lock);
1136         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1137         spin_unlock(&zcrypt_list_lock);
1138
1139 out_free:
1140         kfree(targets);
1141 out:
1142         ap_release_message(&ap_msg);
1143         if (tr) {
1144                 tr->last_rc = rc;
1145                 tr->last_qid = qid;
1146         }
1147         trace_s390_zcrypt_rep(xcrb, func_code, rc,
1148                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1149         return rc;
1150 }
1151
1152 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1153 {
1154         return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb);
1155 }
1156 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1157
1158 static long zcrypt_rng(char *buffer)
1159 {
1160         struct zcrypt_card *zc, *pref_zc;
1161         struct zcrypt_queue *zq, *pref_zq;
1162         unsigned int wgt = 0, pref_wgt = 0;
1163         unsigned int func_code;
1164         struct ap_message ap_msg;
1165         unsigned int domain;
1166         int qid = 0, rc = -ENODEV;
1167         struct module *mod;
1168
1169         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1170
1171         ap_init_message(&ap_msg);
1172         rc = prep_rng_ap_msg(&ap_msg, &func_code, &domain);
1173         if (rc)
1174                 goto out;
1175
1176         pref_zc = NULL;
1177         pref_zq = NULL;
1178         spin_lock(&zcrypt_list_lock);
1179         for_each_zcrypt_card(zc) {
1180                 /* Check for usable CCA card */
1181                 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1182                     !zc->card->hwinfo.cca)
1183                         continue;
1184                 /* get weight index of the card device  */
1185                 wgt = zc->speed_rating[func_code];
1186                 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
1187                         continue;
1188                 for_each_zcrypt_queue(zq, zc) {
1189                         /* check if device is usable and eligible */
1190                         if (!zq->online || !zq->ops->rng ||
1191                             !ap_queue_usable(zq->queue))
1192                                 continue;
1193                         if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
1194                                 continue;
1195                         pref_zc = zc;
1196                         pref_zq = zq;
1197                         pref_wgt = wgt;
1198                 }
1199         }
1200         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1201         spin_unlock(&zcrypt_list_lock);
1202
1203         if (!pref_zq) {
1204                 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
1205                                __func__);
1206                 rc = -ENODEV;
1207                 goto out;
1208         }
1209
1210         qid = pref_zq->queue->qid;
1211         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1212
1213         spin_lock(&zcrypt_list_lock);
1214         zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1215         spin_unlock(&zcrypt_list_lock);
1216
1217 out:
1218         ap_release_message(&ap_msg);
1219         trace_s390_zcrypt_rep(buffer, func_code, rc,
1220                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1221         return rc;
1222 }
1223
1224 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1225 {
1226         struct zcrypt_card *zc;
1227         struct zcrypt_queue *zq;
1228         struct zcrypt_device_status *stat;
1229         int card, queue;
1230
1231         memset(devstatus, 0, MAX_ZDEV_ENTRIES
1232                * sizeof(struct zcrypt_device_status));
1233
1234         spin_lock(&zcrypt_list_lock);
1235         for_each_zcrypt_card(zc) {
1236                 for_each_zcrypt_queue(zq, zc) {
1237                         card = AP_QID_CARD(zq->queue->qid);
1238                         if (card >= MAX_ZDEV_CARDIDS)
1239                                 continue;
1240                         queue = AP_QID_QUEUE(zq->queue->qid);
1241                         stat = &devstatus[card * AP_DOMAINS + queue];
1242                         stat->hwtype = zc->card->ap_dev.device_type;
1243                         stat->functions = zc->card->hwinfo.fac >> 26;
1244                         stat->qid = zq->queue->qid;
1245                         stat->online = zq->online ? 0x01 : 0x00;
1246                 }
1247         }
1248         spin_unlock(&zcrypt_list_lock);
1249 }
1250
1251 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1252 {
1253         struct zcrypt_card *zc;
1254         struct zcrypt_queue *zq;
1255         struct zcrypt_device_status_ext *stat;
1256         int card, queue;
1257
1258         memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1259                * sizeof(struct zcrypt_device_status_ext));
1260
1261         spin_lock(&zcrypt_list_lock);
1262         for_each_zcrypt_card(zc) {
1263                 for_each_zcrypt_queue(zq, zc) {
1264                         card = AP_QID_CARD(zq->queue->qid);
1265                         queue = AP_QID_QUEUE(zq->queue->qid);
1266                         stat = &devstatus[card * AP_DOMAINS + queue];
1267                         stat->hwtype = zc->card->ap_dev.device_type;
1268                         stat->functions = zc->card->hwinfo.fac >> 26;
1269                         stat->qid = zq->queue->qid;
1270                         stat->online = zq->online ? 0x01 : 0x00;
1271                 }
1272         }
1273         spin_unlock(&zcrypt_list_lock);
1274 }
1275 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1276
1277 int zcrypt_device_status_ext(int card, int queue,
1278                              struct zcrypt_device_status_ext *devstat)
1279 {
1280         struct zcrypt_card *zc;
1281         struct zcrypt_queue *zq;
1282
1283         memset(devstat, 0, sizeof(*devstat));
1284
1285         spin_lock(&zcrypt_list_lock);
1286         for_each_zcrypt_card(zc) {
1287                 for_each_zcrypt_queue(zq, zc) {
1288                         if (card == AP_QID_CARD(zq->queue->qid) &&
1289                             queue == AP_QID_QUEUE(zq->queue->qid)) {
1290                                 devstat->hwtype = zc->card->ap_dev.device_type;
1291                                 devstat->functions = zc->card->hwinfo.fac >> 26;
1292                                 devstat->qid = zq->queue->qid;
1293                                 devstat->online = zq->online ? 0x01 : 0x00;
1294                                 spin_unlock(&zcrypt_list_lock);
1295                                 return 0;
1296                         }
1297                 }
1298         }
1299         spin_unlock(&zcrypt_list_lock);
1300
1301         return -ENODEV;
1302 }
1303 EXPORT_SYMBOL(zcrypt_device_status_ext);
1304
1305 static void zcrypt_status_mask(char status[], size_t max_adapters)
1306 {
1307         struct zcrypt_card *zc;
1308         struct zcrypt_queue *zq;
1309         int card;
1310
1311         memset(status, 0, max_adapters);
1312         spin_lock(&zcrypt_list_lock);
1313         for_each_zcrypt_card(zc) {
1314                 for_each_zcrypt_queue(zq, zc) {
1315                         card = AP_QID_CARD(zq->queue->qid);
1316                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1317                             card >= max_adapters)
1318                                 continue;
1319                         status[card] = zc->online ? zc->user_space_type : 0x0d;
1320                 }
1321         }
1322         spin_unlock(&zcrypt_list_lock);
1323 }
1324
1325 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1326 {
1327         struct zcrypt_card *zc;
1328         struct zcrypt_queue *zq;
1329         int card;
1330
1331         memset(qdepth, 0, max_adapters);
1332         spin_lock(&zcrypt_list_lock);
1333         local_bh_disable();
1334         for_each_zcrypt_card(zc) {
1335                 for_each_zcrypt_queue(zq, zc) {
1336                         card = AP_QID_CARD(zq->queue->qid);
1337                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1338                             card >= max_adapters)
1339                                 continue;
1340                         spin_lock(&zq->queue->lock);
1341                         qdepth[card] =
1342                                 zq->queue->pendingq_count +
1343                                 zq->queue->requestq_count;
1344                         spin_unlock(&zq->queue->lock);
1345                 }
1346         }
1347         local_bh_enable();
1348         spin_unlock(&zcrypt_list_lock);
1349 }
1350
1351 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1352 {
1353         struct zcrypt_card *zc;
1354         struct zcrypt_queue *zq;
1355         int card;
1356         u64 cnt;
1357
1358         memset(reqcnt, 0, sizeof(int) * max_adapters);
1359         spin_lock(&zcrypt_list_lock);
1360         local_bh_disable();
1361         for_each_zcrypt_card(zc) {
1362                 for_each_zcrypt_queue(zq, zc) {
1363                         card = AP_QID_CARD(zq->queue->qid);
1364                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1365                             card >= max_adapters)
1366                                 continue;
1367                         spin_lock(&zq->queue->lock);
1368                         cnt = zq->queue->total_request_count;
1369                         spin_unlock(&zq->queue->lock);
1370                         reqcnt[card] = (cnt < UINT_MAX) ? (u32)cnt : UINT_MAX;
1371                 }
1372         }
1373         local_bh_enable();
1374         spin_unlock(&zcrypt_list_lock);
1375 }
1376
1377 static int zcrypt_pendingq_count(void)
1378 {
1379         struct zcrypt_card *zc;
1380         struct zcrypt_queue *zq;
1381         int pendingq_count;
1382
1383         pendingq_count = 0;
1384         spin_lock(&zcrypt_list_lock);
1385         local_bh_disable();
1386         for_each_zcrypt_card(zc) {
1387                 for_each_zcrypt_queue(zq, zc) {
1388                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1389                                 continue;
1390                         spin_lock(&zq->queue->lock);
1391                         pendingq_count += zq->queue->pendingq_count;
1392                         spin_unlock(&zq->queue->lock);
1393                 }
1394         }
1395         local_bh_enable();
1396         spin_unlock(&zcrypt_list_lock);
1397         return pendingq_count;
1398 }
1399
1400 static int zcrypt_requestq_count(void)
1401 {
1402         struct zcrypt_card *zc;
1403         struct zcrypt_queue *zq;
1404         int requestq_count;
1405
1406         requestq_count = 0;
1407         spin_lock(&zcrypt_list_lock);
1408         local_bh_disable();
1409         for_each_zcrypt_card(zc) {
1410                 for_each_zcrypt_queue(zq, zc) {
1411                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1412                                 continue;
1413                         spin_lock(&zq->queue->lock);
1414                         requestq_count += zq->queue->requestq_count;
1415                         spin_unlock(&zq->queue->lock);
1416                 }
1417         }
1418         local_bh_enable();
1419         spin_unlock(&zcrypt_list_lock);
1420         return requestq_count;
1421 }
1422
1423 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1424 {
1425         int rc;
1426         struct zcrypt_track tr;
1427         struct ica_rsa_modexpo mex;
1428         struct ica_rsa_modexpo __user *umex = (void __user *)arg;
1429
1430         memset(&tr, 0, sizeof(tr));
1431         if (copy_from_user(&mex, umex, sizeof(mex)))
1432                 return -EFAULT;
1433
1434         do {
1435                 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1436                 if (rc == -EAGAIN)
1437                         tr.again_counter++;
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_DBG("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         do {
1467                 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1468                 if (rc == -EAGAIN)
1469                         tr.again_counter++;
1470         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1471         /* on failure: retry once again after a requested rescan */
1472         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1473                 do {
1474                         rc = zcrypt_rsa_crt(perms, &tr, &crt);
1475                         if (rc == -EAGAIN)
1476                                 tr.again_counter++;
1477                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1478         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1479                 rc = -EIO;
1480         if (rc) {
1481                 ZCRYPT_DBF_DBG("ioctl ICARSACRT rc=%d\n", rc);
1482                 return rc;
1483         }
1484         return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1485 }
1486
1487 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1488 {
1489         int rc;
1490         struct ica_xcRB xcrb;
1491         struct zcrypt_track tr;
1492         struct ica_xcRB __user *uxcrb = (void __user *)arg;
1493
1494         memset(&tr, 0, sizeof(tr));
1495         if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1496                 return -EFAULT;
1497
1498         do {
1499                 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1500                 if (rc == -EAGAIN)
1501                         tr.again_counter++;
1502         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1503         /* on failure: retry once again after a requested rescan */
1504         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1505                 do {
1506                         rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1507                         if (rc == -EAGAIN)
1508                                 tr.again_counter++;
1509                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1510         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1511                 rc = -EIO;
1512         if (rc)
1513                 ZCRYPT_DBF_DBG("ioctl ZSENDCPRB rc=%d status=0x%x\n",
1514                                rc, xcrb.status);
1515         if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1516                 return -EFAULT;
1517         return rc;
1518 }
1519
1520 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1521 {
1522         int rc;
1523         struct ep11_urb xcrb;
1524         struct zcrypt_track tr;
1525         struct ep11_urb __user *uxcrb = (void __user *)arg;
1526
1527         memset(&tr, 0, sizeof(tr));
1528         if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1529                 return -EFAULT;
1530
1531         do {
1532                 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1533                 if (rc == -EAGAIN)
1534                         tr.again_counter++;
1535         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1536         /* on failure: retry once again after a requested rescan */
1537         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1538                 do {
1539                         rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1540                         if (rc == -EAGAIN)
1541                                 tr.again_counter++;
1542                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1543         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1544                 rc = -EIO;
1545         if (rc)
1546                 ZCRYPT_DBF_DBG("ioctl ZSENDEP11CPRB rc=%d\n", rc);
1547         if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1548                 return -EFAULT;
1549         return rc;
1550 }
1551
1552 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1553                                   unsigned long arg)
1554 {
1555         int rc;
1556         struct ap_perms *perms =
1557                 (struct ap_perms *)filp->private_data;
1558
1559         rc = zcrypt_check_ioctl(perms, cmd);
1560         if (rc)
1561                 return rc;
1562
1563         switch (cmd) {
1564         case ICARSAMODEXPO:
1565                 return icarsamodexpo_ioctl(perms, arg);
1566         case ICARSACRT:
1567                 return icarsacrt_ioctl(perms, arg);
1568         case ZSECSENDCPRB:
1569                 return zsecsendcprb_ioctl(perms, arg);
1570         case ZSENDEP11CPRB:
1571                 return zsendep11cprb_ioctl(perms, arg);
1572         case ZCRYPT_DEVICE_STATUS: {
1573                 struct zcrypt_device_status_ext *device_status;
1574                 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1575                         * sizeof(struct zcrypt_device_status_ext);
1576
1577                 device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT,
1578                                                sizeof(struct zcrypt_device_status_ext),
1579                                                GFP_KERNEL);
1580                 if (!device_status)
1581                         return -ENOMEM;
1582                 zcrypt_device_status_mask_ext(device_status);
1583                 if (copy_to_user((char __user *)arg, device_status,
1584                                  total_size))
1585                         rc = -EFAULT;
1586                 kvfree(device_status);
1587                 return rc;
1588         }
1589         case ZCRYPT_STATUS_MASK: {
1590                 char status[AP_DEVICES];
1591
1592                 zcrypt_status_mask(status, AP_DEVICES);
1593                 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1594                         return -EFAULT;
1595                 return 0;
1596         }
1597         case ZCRYPT_QDEPTH_MASK: {
1598                 char qdepth[AP_DEVICES];
1599
1600                 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1601                 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1602                         return -EFAULT;
1603                 return 0;
1604         }
1605         case ZCRYPT_PERDEV_REQCNT: {
1606                 u32 *reqcnt;
1607
1608                 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1609                 if (!reqcnt)
1610                         return -ENOMEM;
1611                 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1612                 if (copy_to_user((int __user *)arg, reqcnt,
1613                                  sizeof(u32) * AP_DEVICES))
1614                         rc = -EFAULT;
1615                 kfree(reqcnt);
1616                 return rc;
1617         }
1618         case Z90STAT_REQUESTQ_COUNT:
1619                 return put_user(zcrypt_requestq_count(), (int __user *)arg);
1620         case Z90STAT_PENDINGQ_COUNT:
1621                 return put_user(zcrypt_pendingq_count(), (int __user *)arg);
1622         case Z90STAT_TOTALOPEN_COUNT:
1623                 return put_user(atomic_read(&zcrypt_open_count),
1624                                 (int __user *)arg);
1625         case Z90STAT_DOMAIN_INDEX:
1626                 return put_user(ap_domain_index, (int __user *)arg);
1627         /*
1628          * Deprecated ioctls
1629          */
1630         case ZDEVICESTATUS: {
1631                 /* the old ioctl supports only 64 adapters */
1632                 struct zcrypt_device_status *device_status;
1633                 size_t total_size = MAX_ZDEV_ENTRIES
1634                         * sizeof(struct zcrypt_device_status);
1635
1636                 device_status = kzalloc(total_size, GFP_KERNEL);
1637                 if (!device_status)
1638                         return -ENOMEM;
1639                 zcrypt_device_status_mask(device_status);
1640                 if (copy_to_user((char __user *)arg, device_status,
1641                                  total_size))
1642                         rc = -EFAULT;
1643                 kfree(device_status);
1644                 return rc;
1645         }
1646         case Z90STAT_STATUS_MASK: {
1647                 /* the old ioctl supports only 64 adapters */
1648                 char status[MAX_ZDEV_CARDIDS];
1649
1650                 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1651                 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1652                         return -EFAULT;
1653                 return 0;
1654         }
1655         case Z90STAT_QDEPTH_MASK: {
1656                 /* the old ioctl supports only 64 adapters */
1657                 char qdepth[MAX_ZDEV_CARDIDS];
1658
1659                 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1660                 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1661                         return -EFAULT;
1662                 return 0;
1663         }
1664         case Z90STAT_PERDEV_REQCNT: {
1665                 /* the old ioctl supports only 64 adapters */
1666                 u32 reqcnt[MAX_ZDEV_CARDIDS];
1667
1668                 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1669                 if (copy_to_user((int __user *)arg, reqcnt, sizeof(reqcnt)))
1670                         return -EFAULT;
1671                 return 0;
1672         }
1673         /* unknown ioctl number */
1674         default:
1675                 ZCRYPT_DBF_DBG("unknown ioctl 0x%08x\n", cmd);
1676                 return -ENOIOCTLCMD;
1677         }
1678 }
1679
1680 #ifdef CONFIG_COMPAT
1681 /*
1682  * ioctl32 conversion routines
1683  */
1684 struct compat_ica_rsa_modexpo {
1685         compat_uptr_t   inputdata;
1686         unsigned int    inputdatalength;
1687         compat_uptr_t   outputdata;
1688         unsigned int    outputdatalength;
1689         compat_uptr_t   b_key;
1690         compat_uptr_t   n_modulus;
1691 };
1692
1693 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1694                             unsigned int cmd, unsigned long arg)
1695 {
1696         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1697         struct compat_ica_rsa_modexpo mex32;
1698         struct ica_rsa_modexpo mex64;
1699         struct zcrypt_track tr;
1700         long rc;
1701
1702         memset(&tr, 0, sizeof(tr));
1703         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1704                 return -EFAULT;
1705         mex64.inputdata = compat_ptr(mex32.inputdata);
1706         mex64.inputdatalength = mex32.inputdatalength;
1707         mex64.outputdata = compat_ptr(mex32.outputdata);
1708         mex64.outputdatalength = mex32.outputdatalength;
1709         mex64.b_key = compat_ptr(mex32.b_key);
1710         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1711         do {
1712                 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1713                 if (rc == -EAGAIN)
1714                         tr.again_counter++;
1715         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1716         /* on failure: retry once again after a requested rescan */
1717         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1718                 do {
1719                         rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1720                         if (rc == -EAGAIN)
1721                                 tr.again_counter++;
1722                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1723         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1724                 rc = -EIO;
1725         if (rc)
1726                 return rc;
1727         return put_user(mex64.outputdatalength,
1728                         &umex32->outputdatalength);
1729 }
1730
1731 struct compat_ica_rsa_modexpo_crt {
1732         compat_uptr_t   inputdata;
1733         unsigned int    inputdatalength;
1734         compat_uptr_t   outputdata;
1735         unsigned int    outputdatalength;
1736         compat_uptr_t   bp_key;
1737         compat_uptr_t   bq_key;
1738         compat_uptr_t   np_prime;
1739         compat_uptr_t   nq_prime;
1740         compat_uptr_t   u_mult_inv;
1741 };
1742
1743 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1744                                 unsigned int cmd, unsigned long arg)
1745 {
1746         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1747         struct compat_ica_rsa_modexpo_crt crt32;
1748         struct ica_rsa_modexpo_crt crt64;
1749         struct zcrypt_track tr;
1750         long rc;
1751
1752         memset(&tr, 0, sizeof(tr));
1753         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1754                 return -EFAULT;
1755         crt64.inputdata = compat_ptr(crt32.inputdata);
1756         crt64.inputdatalength = crt32.inputdatalength;
1757         crt64.outputdata = compat_ptr(crt32.outputdata);
1758         crt64.outputdatalength = crt32.outputdatalength;
1759         crt64.bp_key = compat_ptr(crt32.bp_key);
1760         crt64.bq_key = compat_ptr(crt32.bq_key);
1761         crt64.np_prime = compat_ptr(crt32.np_prime);
1762         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1763         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1764         do {
1765                 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1766                 if (rc == -EAGAIN)
1767                         tr.again_counter++;
1768         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1769         /* on failure: retry once again after a requested rescan */
1770         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1771                 do {
1772                         rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1773                         if (rc == -EAGAIN)
1774                                 tr.again_counter++;
1775                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1776         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1777                 rc = -EIO;
1778         if (rc)
1779                 return rc;
1780         return put_user(crt64.outputdatalength,
1781                         &ucrt32->outputdatalength);
1782 }
1783
1784 struct compat_ica_xcrb {
1785         unsigned short  agent_ID;
1786         unsigned int    user_defined;
1787         unsigned short  request_ID;
1788         unsigned int    request_control_blk_length;
1789         unsigned char   padding1[16 - sizeof(compat_uptr_t)];
1790         compat_uptr_t   request_control_blk_addr;
1791         unsigned int    request_data_length;
1792         char            padding2[16 - sizeof(compat_uptr_t)];
1793         compat_uptr_t   request_data_address;
1794         unsigned int    reply_control_blk_length;
1795         char            padding3[16 - sizeof(compat_uptr_t)];
1796         compat_uptr_t   reply_control_blk_addr;
1797         unsigned int    reply_data_length;
1798         char            padding4[16 - sizeof(compat_uptr_t)];
1799         compat_uptr_t   reply_data_addr;
1800         unsigned short  priority_window;
1801         unsigned int    status;
1802 } __packed;
1803
1804 static long trans_xcrb32(struct ap_perms *perms, struct file *filp,
1805                          unsigned int cmd, unsigned long arg)
1806 {
1807         struct compat_ica_xcrb __user *uxcrb32 = compat_ptr(arg);
1808         struct compat_ica_xcrb xcrb32;
1809         struct zcrypt_track tr;
1810         struct ica_xcRB xcrb64;
1811         long rc;
1812
1813         memset(&tr, 0, sizeof(tr));
1814         if (copy_from_user(&xcrb32, uxcrb32, sizeof(xcrb32)))
1815                 return -EFAULT;
1816         xcrb64.agent_ID = xcrb32.agent_ID;
1817         xcrb64.user_defined = xcrb32.user_defined;
1818         xcrb64.request_ID = xcrb32.request_ID;
1819         xcrb64.request_control_blk_length =
1820                 xcrb32.request_control_blk_length;
1821         xcrb64.request_control_blk_addr =
1822                 compat_ptr(xcrb32.request_control_blk_addr);
1823         xcrb64.request_data_length =
1824                 xcrb32.request_data_length;
1825         xcrb64.request_data_address =
1826                 compat_ptr(xcrb32.request_data_address);
1827         xcrb64.reply_control_blk_length =
1828                 xcrb32.reply_control_blk_length;
1829         xcrb64.reply_control_blk_addr =
1830                 compat_ptr(xcrb32.reply_control_blk_addr);
1831         xcrb64.reply_data_length = xcrb32.reply_data_length;
1832         xcrb64.reply_data_addr =
1833                 compat_ptr(xcrb32.reply_data_addr);
1834         xcrb64.priority_window = xcrb32.priority_window;
1835         xcrb64.status = xcrb32.status;
1836         do {
1837                 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1838                 if (rc == -EAGAIN)
1839                         tr.again_counter++;
1840         } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1841         /* on failure: retry once again after a requested rescan */
1842         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1843                 do {
1844                         rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1845                         if (rc == -EAGAIN)
1846                                 tr.again_counter++;
1847                 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1848         if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1849                 rc = -EIO;
1850         xcrb32.reply_control_blk_length = xcrb64.reply_control_blk_length;
1851         xcrb32.reply_data_length = xcrb64.reply_data_length;
1852         xcrb32.status = xcrb64.status;
1853         if (copy_to_user(uxcrb32, &xcrb32, sizeof(xcrb32)))
1854                 return -EFAULT;
1855         return rc;
1856 }
1857
1858 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1859                                 unsigned long arg)
1860 {
1861         int rc;
1862         struct ap_perms *perms =
1863                 (struct ap_perms *)filp->private_data;
1864
1865         rc = zcrypt_check_ioctl(perms, cmd);
1866         if (rc)
1867                 return rc;
1868
1869         if (cmd == ICARSAMODEXPO)
1870                 return trans_modexpo32(perms, filp, cmd, arg);
1871         if (cmd == ICARSACRT)
1872                 return trans_modexpo_crt32(perms, filp, cmd, arg);
1873         if (cmd == ZSECSENDCPRB)
1874                 return trans_xcrb32(perms, filp, cmd, arg);
1875         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1876 }
1877 #endif
1878
1879 /*
1880  * Misc device file operations.
1881  */
1882 static const struct file_operations zcrypt_fops = {
1883         .owner          = THIS_MODULE,
1884         .read           = zcrypt_read,
1885         .write          = zcrypt_write,
1886         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1887 #ifdef CONFIG_COMPAT
1888         .compat_ioctl   = zcrypt_compat_ioctl,
1889 #endif
1890         .open           = zcrypt_open,
1891         .release        = zcrypt_release,
1892         .llseek         = no_llseek,
1893 };
1894
1895 /*
1896  * Misc device.
1897  */
1898 static struct miscdevice zcrypt_misc_device = {
1899         .minor      = MISC_DYNAMIC_MINOR,
1900         .name       = "z90crypt",
1901         .fops       = &zcrypt_fops,
1902 };
1903
1904 static int zcrypt_rng_device_count;
1905 static u32 *zcrypt_rng_buffer;
1906 static int zcrypt_rng_buffer_index;
1907 static DEFINE_MUTEX(zcrypt_rng_mutex);
1908
1909 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1910 {
1911         int rc;
1912
1913         /*
1914          * We don't need locking here because the RNG API guarantees serialized
1915          * read method calls.
1916          */
1917         if (zcrypt_rng_buffer_index == 0) {
1918                 rc = zcrypt_rng((char *)zcrypt_rng_buffer);
1919                 /* on failure: retry once again after a requested rescan */
1920                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1921                         rc = zcrypt_rng((char *)zcrypt_rng_buffer);
1922                 if (rc < 0)
1923                         return -EIO;
1924                 zcrypt_rng_buffer_index = rc / sizeof(*data);
1925         }
1926         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1927         return sizeof(*data);
1928 }
1929
1930 static struct hwrng zcrypt_rng_dev = {
1931         .name           = "zcrypt",
1932         .data_read      = zcrypt_rng_data_read,
1933         .quality        = 990,
1934 };
1935
1936 int zcrypt_rng_device_add(void)
1937 {
1938         int rc = 0;
1939
1940         mutex_lock(&zcrypt_rng_mutex);
1941         if (zcrypt_rng_device_count == 0) {
1942                 zcrypt_rng_buffer = (u32 *)get_zeroed_page(GFP_KERNEL);
1943                 if (!zcrypt_rng_buffer) {
1944                         rc = -ENOMEM;
1945                         goto out;
1946                 }
1947                 zcrypt_rng_buffer_index = 0;
1948                 rc = hwrng_register(&zcrypt_rng_dev);
1949                 if (rc)
1950                         goto out_free;
1951                 zcrypt_rng_device_count = 1;
1952         } else {
1953                 zcrypt_rng_device_count++;
1954         }
1955         mutex_unlock(&zcrypt_rng_mutex);
1956         return 0;
1957
1958 out_free:
1959         free_page((unsigned long)zcrypt_rng_buffer);
1960 out:
1961         mutex_unlock(&zcrypt_rng_mutex);
1962         return rc;
1963 }
1964
1965 void zcrypt_rng_device_remove(void)
1966 {
1967         mutex_lock(&zcrypt_rng_mutex);
1968         zcrypt_rng_device_count--;
1969         if (zcrypt_rng_device_count == 0) {
1970                 hwrng_unregister(&zcrypt_rng_dev);
1971                 free_page((unsigned long)zcrypt_rng_buffer);
1972         }
1973         mutex_unlock(&zcrypt_rng_mutex);
1974 }
1975
1976 /*
1977  * Wait until the zcrypt api is operational.
1978  * The AP bus scan and the binding of ap devices to device drivers is
1979  * an asynchronous job. This function waits until these initial jobs
1980  * are done and so the zcrypt api should be ready to serve crypto
1981  * requests - if there are resources available. The function uses an
1982  * internal timeout of 60s. The very first caller will either wait for
1983  * ap bus bindings complete or the timeout happens. This state will be
1984  * remembered for further callers which will only be blocked until a
1985  * decision is made (timeout or bindings complete).
1986  * On timeout -ETIME is returned, on success the return value is 0.
1987  */
1988 int zcrypt_wait_api_operational(void)
1989 {
1990         static DEFINE_MUTEX(zcrypt_wait_api_lock);
1991         static int zcrypt_wait_api_state;
1992         int rc;
1993
1994         rc = mutex_lock_interruptible(&zcrypt_wait_api_lock);
1995         if (rc)
1996                 return rc;
1997
1998         switch (zcrypt_wait_api_state) {
1999         case 0:
2000                 /* initial state, invoke wait for the ap bus complete */
2001                 rc = ap_wait_init_apqn_bindings_complete(
2002                         msecs_to_jiffies(60 * 1000));
2003                 switch (rc) {
2004                 case 0:
2005                         /* ap bus bindings are complete */
2006                         zcrypt_wait_api_state = 1;
2007                         break;
2008                 case -EINTR:
2009                         /* interrupted, go back to caller */
2010                         break;
2011                 case -ETIME:
2012                         /* timeout */
2013                         ZCRYPT_DBF_WARN("%s ap_wait_init_apqn_bindings_complete()=ETIME\n",
2014                                         __func__);
2015                         zcrypt_wait_api_state = -ETIME;
2016                         break;
2017                 default:
2018                         /* other failure */
2019                         ZCRYPT_DBF_DBG("%s ap_wait_init_apqn_bindings_complete()=%d\n",
2020                                        __func__, rc);
2021                         break;
2022                 }
2023                 break;
2024         case 1:
2025                 /* a previous caller already found ap bus bindings complete */
2026                 rc = 0;
2027                 break;
2028         default:
2029                 /* a previous caller had timeout or other failure */
2030                 rc = zcrypt_wait_api_state;
2031                 break;
2032         }
2033
2034         mutex_unlock(&zcrypt_wait_api_lock);
2035
2036         return rc;
2037 }
2038 EXPORT_SYMBOL(zcrypt_wait_api_operational);
2039
2040 int __init zcrypt_debug_init(void)
2041 {
2042         zcrypt_dbf_info = debug_register("zcrypt", 2, 1,
2043                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
2044         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
2045         debug_set_level(zcrypt_dbf_info, DBF_ERR);
2046
2047         return 0;
2048 }
2049
2050 void zcrypt_debug_exit(void)
2051 {
2052         debug_unregister(zcrypt_dbf_info);
2053 }
2054
2055 static int __init zcdn_init(void)
2056 {
2057         int rc;
2058
2059         /* create a new class 'zcrypt' */
2060         zcrypt_class = class_create(ZCRYPT_NAME);
2061         if (IS_ERR(zcrypt_class)) {
2062                 rc = PTR_ERR(zcrypt_class);
2063                 goto out_class_create_failed;
2064         }
2065         zcrypt_class->dev_release = zcdn_device_release;
2066
2067         /* alloc device minor range */
2068         rc = alloc_chrdev_region(&zcrypt_devt,
2069                                  0, ZCRYPT_MAX_MINOR_NODES,
2070                                  ZCRYPT_NAME);
2071         if (rc)
2072                 goto out_alloc_chrdev_failed;
2073
2074         cdev_init(&zcrypt_cdev, &zcrypt_fops);
2075         zcrypt_cdev.owner = THIS_MODULE;
2076         rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2077         if (rc)
2078                 goto out_cdev_add_failed;
2079
2080         /* need some class specific sysfs attributes */
2081         rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
2082         if (rc)
2083                 goto out_class_create_file_1_failed;
2084         rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
2085         if (rc)
2086                 goto out_class_create_file_2_failed;
2087
2088         return 0;
2089
2090 out_class_create_file_2_failed:
2091         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2092 out_class_create_file_1_failed:
2093         cdev_del(&zcrypt_cdev);
2094 out_cdev_add_failed:
2095         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2096 out_alloc_chrdev_failed:
2097         class_destroy(zcrypt_class);
2098 out_class_create_failed:
2099         return rc;
2100 }
2101
2102 static void zcdn_exit(void)
2103 {
2104         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2105         class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
2106         zcdn_destroy_all();
2107         cdev_del(&zcrypt_cdev);
2108         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2109         class_destroy(zcrypt_class);
2110 }
2111
2112 /*
2113  * zcrypt_api_init(): Module initialization.
2114  *
2115  * The module initialization code.
2116  */
2117 int __init zcrypt_api_init(void)
2118 {
2119         int rc;
2120
2121         rc = zcrypt_debug_init();
2122         if (rc)
2123                 goto out;
2124
2125         rc = zcdn_init();
2126         if (rc)
2127                 goto out;
2128
2129         /* Register the request sprayer. */
2130         rc = misc_register(&zcrypt_misc_device);
2131         if (rc < 0)
2132                 goto out_misc_register_failed;
2133
2134         zcrypt_msgtype6_init();
2135         zcrypt_msgtype50_init();
2136
2137         return 0;
2138
2139 out_misc_register_failed:
2140         zcdn_exit();
2141         zcrypt_debug_exit();
2142 out:
2143         return rc;
2144 }
2145
2146 /*
2147  * zcrypt_api_exit(): Module termination.
2148  *
2149  * The module termination code.
2150  */
2151 void __exit zcrypt_api_exit(void)
2152 {
2153         zcdn_exit();
2154         misc_deregister(&zcrypt_misc_device);
2155         zcrypt_msgtype6_exit();
2156         zcrypt_msgtype50_exit();
2157         zcrypt_ccamisc_exit();
2158         zcrypt_ep11misc_exit();
2159         zcrypt_debug_exit();
2160 }
2161
2162 module_init(zcrypt_api_init);
2163 module_exit(zcrypt_api_exit);