drivers/s390/crypto/zcrypt_api.c

   1 /*
   2  *  zcrypt 2.1.0
   3  *
   4  *  Copyright IBM Corp. 2001, 2012
   5  *  Author(s): Robert Burroughs
   6  *             Eric Rossman (edrossma@us.ibm.com)
   7  *             Cornelia Huck <cornelia.huck@de.ibm.com>
   8  *
   9  *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
  10  *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
  11  *                                Ralph Wuerthner <rwuerthn@de.ibm.com>
  12  *  MSGTYPE restruct:             Holger Dengler <hd@linux.vnet.ibm.com>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include <linux/module.h>
  30 #include <linux/init.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/miscdevice.h>
  33 #include <linux/fs.h>
  34 #include <linux/proc_fs.h>
  35 #include <linux/seq_file.h>
  36 #include <linux/compat.h>
  37 #include <linux/slab.h>
  38 #include <linux/atomic.h>
  39 #include <linux/uaccess.h>
  40 #include <linux/hw_random.h>
  41 #include <linux/debugfs.h>
  42 #include <asm/debug.h>
  43
  44 #define CREATE_TRACE_POINTS
  45 #include <asm/trace/zcrypt.h>
  46
  47 #include "zcrypt_api.h"
  48 #include "zcrypt_debug.h"
  49
  50 #include "zcrypt_msgtype6.h"
  51 #include "zcrypt_msgtype50.h"
  52
  53 /*
  54  * Module description.
  55  */
  56 MODULE_AUTHOR("IBM Corporation");
  57 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
  58                    "Copyright IBM Corp. 2001, 2012");
  59 MODULE_LICENSE("GPL");
  60
  61 /*
  62  * zcrypt tracepoint functions
  63  */
  64 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
  65 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
  66
  67 static int zcrypt_hwrng_seed = 1;
  68 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, S_IRUSR|S_IRGRP);
  69 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
  70
  71 DEFINE_SPINLOCK(zcrypt_list_lock);
  72 LIST_HEAD(zcrypt_card_list);
  73 int zcrypt_device_count;
  74
  75 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
  76 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
  77
  78 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
  79 EXPORT_SYMBOL(zcrypt_rescan_req);
  80
  81 static LIST_HEAD(zcrypt_ops_list);
  82
  83 /* Zcrypt related debug feature stuff. */
  84 static struct dentry *zcrypt_dbf_root;
  85 debug_info_t *zcrypt_dbf_info;
  86
  87 /**
  88  * Process a rescan of the transport layer.
  89  *
  90  * Returns 1, if the rescan has been processed, otherwise 0.
  91  */
  92 static inline int zcrypt_process_rescan(void)
  93 {
  94         if (atomic_read(&zcrypt_rescan_req)) {
  95                 atomic_set(&zcrypt_rescan_req, 0);
  96                 atomic_inc(&zcrypt_rescan_count);
  97                 ap_bus_force_rescan();
  98                 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d",
  99                            atomic_inc_return(&zcrypt_rescan_count));
 100                 return 1;
 101         }
 102         return 0;
 103 }
 104
 105 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
 106 {
 107         list_add_tail(&zops->list, &zcrypt_ops_list);
 108 }
 109
 110 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
 111 {
 112         list_del_init(&zops->list);
 113 }
 114
 115 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
 116 {
 117         struct zcrypt_ops *zops;
 118
 119         list_for_each_entry(zops, &zcrypt_ops_list, list)
 120                 if ((zops->variant == variant) &&
 121                     (!strncmp(zops->name, name, sizeof(zops->name))))
 122                         return zops;
 123         return NULL;
 124 }
 125 EXPORT_SYMBOL(zcrypt_msgtype);
 126
 127 /**
 128  * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
 129  *
 130  * This function is not supported beyond zcrypt 1.3.1.
 131  */
 132 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
 133                            size_t count, loff_t *f_pos)
 134 {
 135         return -EPERM;
 136 }
 137
 138 /**
 139  * zcrypt_write(): Not allowed.
 140  *
 141  * Write is is not allowed
 142  */
 143 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
 144                             size_t count, loff_t *f_pos)
 145 {
 146         return -EPERM;
 147 }
 148
 149 /**
 150  * zcrypt_open(): Count number of users.
 151  *
 152  * Device open function to count number of users.
 153  */
 154 static int zcrypt_open(struct inode *inode, struct file *filp)
 155 {
 156         atomic_inc(&zcrypt_open_count);
 157         return nonseekable_open(inode, filp);
 158 }
 159
 160 /**
 161  * zcrypt_release(): Count number of users.
 162  *
 163  * Device close function to count number of users.
 164  */
 165 static int zcrypt_release(struct inode *inode, struct file *filp)
 166 {
 167         atomic_dec(&zcrypt_open_count);
 168         return 0;
 169 }
 170
 171 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
 172                                                      struct zcrypt_queue *zq,
 173                                                      unsigned int weight)
 174 {
 175         if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
 176                 return NULL;
 177         zcrypt_queue_get(zq);
 178         get_device(&zq->queue->ap_dev.device);
 179         atomic_add(weight, &zc->load);
 180         atomic_add(weight, &zq->load);
 181         zq->request_count++;
 182         return zq;
 183 }
 184
 185 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
 186                                      struct zcrypt_queue *zq,
 187                                      unsigned int weight)
 188 {
 189         struct module *mod = zq->queue->ap_dev.drv->driver.owner;
 190
 191         zq->request_count--;
 192         atomic_sub(weight, &zc->load);
 193         atomic_sub(weight, &zq->load);
 194         put_device(&zq->queue->ap_dev.device);
 195         zcrypt_queue_put(zq);
 196         module_put(mod);
 197 }
 198
 199 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
 200                                        struct zcrypt_card *pref_zc,
 201                                        unsigned weight, unsigned pref_weight)
 202 {
 203         if (!pref_zc)
 204                 return 0;
 205         weight += atomic_read(&zc->load);
 206         pref_weight += atomic_read(&pref_zc->load);
 207         if (weight == pref_weight)
 208                 return atomic_read(&zc->card->total_request_count) >
 209                         atomic_read(&pref_zc->card->total_request_count);
 210         return weight > pref_weight;
 211 }
 212
 213 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
 214                                         struct zcrypt_queue *pref_zq,
 215                                         unsigned weight, unsigned pref_weight)
 216 {
 217         if (!pref_zq)
 218                 return 0;
 219         weight += atomic_read(&zq->load);
 220         pref_weight += atomic_read(&pref_zq->load);
 221         if (weight == pref_weight)
 222                 return &zq->queue->total_request_count >
 223                         &pref_zq->queue->total_request_count;
 224         return weight > pref_weight;
 225 }
 226
 227 /*
 228  * zcrypt ioctls.
 229  */
 230 static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
 231 {
 232         struct zcrypt_card *zc, *pref_zc;
 233         struct zcrypt_queue *zq, *pref_zq;
 234         unsigned int weight, pref_weight;
 235         unsigned int func_code;
 236         int qid = 0, rc = -ENODEV;
 237
 238         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
 239
 240         if (mex->outputdatalength < mex->inputdatalength) {
 241                 rc = -EINVAL;
 242                 goto out;
 243         }
 244
 245         /*
 246          * As long as outputdatalength is big enough, we can set the
 247          * outputdatalength equal to the inputdatalength, since that is the
 248          * number of bytes we will copy in any case
 249          */
 250         mex->outputdatalength = mex->inputdatalength;
 251
 252         rc = get_rsa_modex_fc(mex, &func_code);
 253         if (rc)
 254                 goto out;
 255
 256         pref_zc = NULL;
 257         pref_zq = NULL;
 258         spin_lock(&zcrypt_list_lock);
 259         for_each_zcrypt_card(zc) {
 260                 /* Check for online accelarator and CCA cards */
 261                 if (!zc->online || !(zc->card->functions & 0x18000000))
 262                         continue;
 263                 /* Check for size limits */
 264                 if (zc->min_mod_size > mex->inputdatalength ||
 265                     zc->max_mod_size < mex->inputdatalength)
 266                         continue;
 267                 /* get weight index of the card device  */
 268                 weight = zc->speed_rating[func_code];
 269                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 270                         continue;
 271                 for_each_zcrypt_queue(zq, zc) {
 272                         /* check if device is online and eligible */
 273                         if (!zq->online || !zq->ops->rsa_modexpo)
 274                                 continue;
 275                         if (zcrypt_queue_compare(zq, pref_zq,
 276                                                  weight, pref_weight))
 277                                 continue;
 278                         pref_zc = zc;
 279                         pref_zq = zq;
 280                         pref_weight = weight;
 281                 }
 282         }
 283         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
 284         spin_unlock(&zcrypt_list_lock);
 285
 286         if (!pref_zq) {
 287                 rc = -ENODEV;
 288                 goto out;
 289         }
 290
 291         qid = pref_zq->queue->qid;
 292         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
 293
 294         spin_lock(&zcrypt_list_lock);
 295         zcrypt_drop_queue(pref_zc, pref_zq, weight);
 296         spin_unlock(&zcrypt_list_lock);
 297
 298 out:
 299         trace_s390_zcrypt_rep(mex, func_code, rc,
 300                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 301         return rc;
 302 }
 303
 304 static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
 305 {
 306         struct zcrypt_card *zc, *pref_zc;
 307         struct zcrypt_queue *zq, *pref_zq;
 308         unsigned int weight, pref_weight;
 309         unsigned int func_code;
 310         int qid = 0, rc = -ENODEV;
 311
 312         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
 313
 314         if (crt->outputdatalength < crt->inputdatalength) {
 315                 rc = -EINVAL;
 316                 goto out;
 317         }
 318
 319         /*
 320          * As long as outputdatalength is big enough, we can set the
 321          * outputdatalength equal to the inputdatalength, since that is the
 322          * number of bytes we will copy in any case
 323          */
 324         crt->outputdatalength = crt->inputdatalength;
 325
 326         rc = get_rsa_crt_fc(crt, &func_code);
 327         if (rc)
 328                 goto out;
 329
 330         pref_zc = NULL;
 331         pref_zq = NULL;
 332         spin_lock(&zcrypt_list_lock);
 333         for_each_zcrypt_card(zc) {
 334                 /* Check for online accelarator and CCA cards */
 335                 if (!zc->online || !(zc->card->functions & 0x18000000))
 336                         continue;
 337                 /* Check for size limits */
 338                 if (zc->min_mod_size > crt->inputdatalength ||
 339                     zc->max_mod_size < crt->inputdatalength)
 340                         continue;
 341                 /* get weight index of the card device  */
 342                 weight = zc->speed_rating[func_code];
 343                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 344                         continue;
 345                 for_each_zcrypt_queue(zq, zc) {
 346                         /* check if device is online and eligible */
 347                         if (!zq->online || !zq->ops->rsa_modexpo_crt)
 348                                 continue;
 349                         if (zcrypt_queue_compare(zq, pref_zq,
 350                                                  weight, pref_weight))
 351                                 continue;
 352                         pref_zc = zc;
 353                         pref_zq = zq;
 354                         pref_weight = weight;
 355                 }
 356         }
 357         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
 358         spin_unlock(&zcrypt_list_lock);
 359
 360         if (!pref_zq) {
 361                 rc = -ENODEV;
 362                 goto out;
 363         }
 364
 365         qid = pref_zq->queue->qid;
 366         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
 367
 368         spin_lock(&zcrypt_list_lock);
 369         zcrypt_drop_queue(pref_zc, pref_zq, weight);
 370         spin_unlock(&zcrypt_list_lock);
 371
 372 out:
 373         trace_s390_zcrypt_rep(crt, func_code, rc,
 374                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 375         return rc;
 376 }
 377
 378 static long zcrypt_send_cprb(struct ica_xcRB *xcRB)
 379 {
 380         struct zcrypt_card *zc, *pref_zc;
 381         struct zcrypt_queue *zq, *pref_zq;
 382         struct ap_message ap_msg;
 383         unsigned int weight, pref_weight;
 384         unsigned int func_code;
 385         unsigned short *domain;
 386         int qid = 0, rc = -ENODEV;
 387
 388         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
 389
 390         rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
 391         if (rc)
 392                 goto out;
 393
 394         pref_zc = NULL;
 395         pref_zq = NULL;
 396         spin_lock(&zcrypt_list_lock);
 397         for_each_zcrypt_card(zc) {
 398                 /* Check for online CCA cards */
 399                 if (!zc->online || !(zc->card->functions & 0x10000000))
 400                         continue;
 401                 /* Check for user selected CCA card */
 402                 if (xcRB->user_defined != AUTOSELECT &&
 403                     xcRB->user_defined != zc->card->id)
 404                         continue;
 405                 /* get weight index of the card device  */
 406                 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 407                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 408                         continue;
 409                 for_each_zcrypt_queue(zq, zc) {
 410                         /* check if device is online and eligible */
 411                         if (!zq->online ||
 412                             !zq->ops->send_cprb ||
 413                             ((*domain != (unsigned short) AUTOSELECT) &&
 414                              (*domain != AP_QID_QUEUE(zq->queue->qid))))
 415                                 continue;
 416                         if (zcrypt_queue_compare(zq, pref_zq,
 417                                                  weight, pref_weight))
 418                                 continue;
 419                         pref_zc = zc;
 420                         pref_zq = zq;
 421                         pref_weight = weight;
 422                 }
 423         }
 424         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
 425         spin_unlock(&zcrypt_list_lock);
 426
 427         if (!pref_zq) {
 428                 rc = -ENODEV;
 429                 goto out;
 430         }
 431
 432         /* in case of auto select, provide the correct domain */
 433         qid = pref_zq->queue->qid;
 434         if (*domain == (unsigned short) AUTOSELECT)
 435                 *domain = AP_QID_QUEUE(qid);
 436
 437         rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
 438
 439         spin_lock(&zcrypt_list_lock);
 440         zcrypt_drop_queue(pref_zc, pref_zq, weight);
 441         spin_unlock(&zcrypt_list_lock);
 442
 443 out:
 444         trace_s390_zcrypt_rep(xcRB, func_code, rc,
 445                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 446         return rc;
 447 }
 448
 449 static bool is_desired_ep11_card(unsigned int dev_id,
 450                                  unsigned short target_num,
 451                                  struct ep11_target_dev *targets)
 452 {
 453         while (target_num-- > 0) {
 454                 if (dev_id == targets->ap_id)
 455                         return true;
 456                 targets++;
 457         }
 458         return false;
 459 }
 460
 461 static bool is_desired_ep11_queue(unsigned int dev_qid,
 462                                   unsigned short target_num,
 463                                   struct ep11_target_dev *targets)
 464 {
 465         while (target_num-- > 0) {
 466                 if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
 467                         return true;
 468                 targets++;
 469         }
 470         return false;
 471 }
 472
 473 static long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
 474 {
 475         struct zcrypt_card *zc, *pref_zc;
 476         struct zcrypt_queue *zq, *pref_zq;
 477         struct ep11_target_dev *targets;
 478         unsigned short target_num;
 479         unsigned int weight, pref_weight;
 480         unsigned int func_code;
 481         struct ap_message ap_msg;
 482         int qid = 0, rc = -ENODEV;
 483
 484         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
 485
 486         target_num = (unsigned short) xcrb->targets_num;
 487
 488         /* empty list indicates autoselect (all available targets) */
 489         targets = NULL;
 490         if (target_num != 0) {
 491                 struct ep11_target_dev __user *uptr;
 492
 493                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
 494                 if (!targets) {
 495                         rc = -ENOMEM;
 496                         goto out;
 497                 }
 498
 499                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
 500                 if (copy_from_user(targets, uptr,
 501                                    target_num * sizeof(*targets))) {
 502                         rc = -EFAULT;
 503                         goto out;
 504                 }
 505         }
 506
 507         rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
 508         if (rc)
 509                 goto out_free;
 510
 511         pref_zc = NULL;
 512         pref_zq = NULL;
 513         spin_lock(&zcrypt_list_lock);
 514         for_each_zcrypt_card(zc) {
 515                 /* Check for online EP11 cards */
 516                 if (!zc->online || !(zc->card->functions & 0x04000000))
 517                         continue;
 518                 /* Check for user selected EP11 card */
 519                 if (targets &&
 520                     !is_desired_ep11_card(zc->card->id, target_num, targets))
 521                         continue;
 522                 /* get weight index of the card device  */
 523                 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
 524                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 525                         continue;
 526                 for_each_zcrypt_queue(zq, zc) {
 527                         /* check if device is online and eligible */
 528                         if (!zq->online ||
 529                             !zq->ops->send_ep11_cprb ||
 530                             (targets &&
 531                              !is_desired_ep11_queue(zq->queue->qid,
 532                                                     target_num, targets)))
 533                                 continue;
 534                         if (zcrypt_queue_compare(zq, pref_zq,
 535                                                  weight, pref_weight))
 536                                 continue;
 537                         pref_zc = zc;
 538                         pref_zq = zq;
 539                         pref_weight = weight;
 540                 }
 541         }
 542         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
 543         spin_unlock(&zcrypt_list_lock);
 544
 545         if (!pref_zq) {
 546                 rc = -ENODEV;
 547                 goto out_free;
 548         }
 549
 550         qid = pref_zq->queue->qid;
 551         rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
 552
 553         spin_lock(&zcrypt_list_lock);
 554         zcrypt_drop_queue(pref_zc, pref_zq, weight);
 555         spin_unlock(&zcrypt_list_lock);
 556
 557 out_free:
 558         kfree(targets);
 559 out:
 560         trace_s390_zcrypt_rep(xcrb, func_code, rc,
 561                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 562         return rc;
 563 }
 564
 565 static long zcrypt_rng(char *buffer)
 566 {
 567         struct zcrypt_card *zc, *pref_zc;
 568         struct zcrypt_queue *zq, *pref_zq;
 569         unsigned int weight, pref_weight;
 570         unsigned int func_code;
 571         struct ap_message ap_msg;
 572         unsigned int domain;
 573         int qid = 0, rc = -ENODEV;
 574
 575         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
 576
 577         rc = get_rng_fc(&ap_msg, &func_code, &domain);
 578         if (rc)
 579                 goto out;
 580
 581         pref_zc = NULL;
 582         pref_zq = NULL;
 583         spin_lock(&zcrypt_list_lock);
 584         for_each_zcrypt_card(zc) {
 585                 /* Check for online CCA cards */
 586                 if (!zc->online || !(zc->card->functions & 0x10000000))
 587                         continue;
 588                 /* get weight index of the card device  */
 589                 weight = zc->speed_rating[func_code];
 590                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 591                         continue;
 592                 for_each_zcrypt_queue(zq, zc) {
 593                         /* check if device is online and eligible */
 594                         if (!zq->online || !zq->ops->rng)
 595                                 continue;
 596                         if (zcrypt_queue_compare(zq, pref_zq,
 597                                                  weight, pref_weight))
 598                                 continue;
 599                         pref_zc = zc;
 600                         pref_zq = zq;
 601                         pref_weight = weight;
 602                 }
 603         }
 604         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
 605         spin_unlock(&zcrypt_list_lock);
 606
 607         if (!pref_zq)
 608                 return -ENODEV;
 609
 610         qid = pref_zq->queue->qid;
 611         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
 612
 613         spin_lock(&zcrypt_list_lock);
 614         zcrypt_drop_queue(pref_zc, pref_zq, weight);
 615         spin_unlock(&zcrypt_list_lock);
 616
 617 out:
 618         trace_s390_zcrypt_rep(buffer, func_code, rc,
 619                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 620         return rc;
 621 }
 622
 623 static void zcrypt_device_status_mask(struct zcrypt_device_matrix *matrix)
 624 {
 625         struct zcrypt_card *zc;
 626         struct zcrypt_queue *zq;
 627         struct zcrypt_device_status *stat;
 628
 629         memset(matrix, 0, sizeof(*matrix));
 630         spin_lock(&zcrypt_list_lock);
 631         for_each_zcrypt_card(zc) {
 632                 for_each_zcrypt_queue(zq, zc) {
 633                         stat = matrix->device;
 634                         stat += AP_QID_CARD(zq->queue->qid) * MAX_ZDEV_DOMAINS;
 635                         stat += AP_QID_QUEUE(zq->queue->qid);
 636                         stat->hwtype = zc->card->ap_dev.device_type;
 637                         stat->functions = zc->card->functions >> 26;
 638                         stat->qid = zq->queue->qid;
 639                         stat->online = zq->online ? 0x01 : 0x00;
 640                 }
 641         }
 642         spin_unlock(&zcrypt_list_lock);
 643 }
 644 EXPORT_SYMBOL(zcrypt_device_status_mask);
 645
 646 static void zcrypt_status_mask(char status[AP_DEVICES])
 647 {
 648         struct zcrypt_card *zc;
 649         struct zcrypt_queue *zq;
 650
 651         memset(status, 0, sizeof(char) * AP_DEVICES);
 652         spin_lock(&zcrypt_list_lock);
 653         for_each_zcrypt_card(zc) {
 654                 for_each_zcrypt_queue(zq, zc) {
 655                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 656                                 continue;
 657                         status[AP_QID_CARD(zq->queue->qid)] =
 658                                 zc->online ? zc->user_space_type : 0x0d;
 659                 }
 660         }
 661         spin_unlock(&zcrypt_list_lock);
 662 }
 663
 664 static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES])
 665 {
 666         struct zcrypt_card *zc;
 667         struct zcrypt_queue *zq;
 668
 669         memset(qdepth, 0, sizeof(char)  * AP_DEVICES);
 670         spin_lock(&zcrypt_list_lock);
 671         for_each_zcrypt_card(zc) {
 672                 for_each_zcrypt_queue(zq, zc) {
 673                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 674                                 continue;
 675                         spin_lock(&zq->queue->lock);
 676                         qdepth[AP_QID_CARD(zq->queue->qid)] =
 677                                 zq->queue->pendingq_count +
 678                                 zq->queue->requestq_count;
 679                         spin_unlock(&zq->queue->lock);
 680                 }
 681         }
 682         spin_unlock(&zcrypt_list_lock);
 683 }
 684
 685 static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES])
 686 {
 687         struct zcrypt_card *zc;
 688         struct zcrypt_queue *zq;
 689
 690         memset(reqcnt, 0, sizeof(int) * AP_DEVICES);
 691         spin_lock(&zcrypt_list_lock);
 692         for_each_zcrypt_card(zc) {
 693                 for_each_zcrypt_queue(zq, zc) {
 694                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 695                                 continue;
 696                         spin_lock(&zq->queue->lock);
 697                         reqcnt[AP_QID_CARD(zq->queue->qid)] =
 698                                 zq->queue->total_request_count;
 699                         spin_unlock(&zq->queue->lock);
 700                 }
 701         }
 702         spin_unlock(&zcrypt_list_lock);
 703 }
 704
 705 static int zcrypt_pendingq_count(void)
 706 {
 707         struct zcrypt_card *zc;
 708         struct zcrypt_queue *zq;
 709         int pendingq_count;
 710
 711         pendingq_count = 0;
 712         spin_lock(&zcrypt_list_lock);
 713         for_each_zcrypt_card(zc) {
 714                 for_each_zcrypt_queue(zq, zc) {
 715                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 716                                 continue;
 717                         spin_lock(&zq->queue->lock);
 718                         pendingq_count += zq->queue->pendingq_count;
 719                         spin_unlock(&zq->queue->lock);
 720                 }
 721         }
 722         spin_unlock(&zcrypt_list_lock);
 723         return pendingq_count;
 724 }
 725
 726 static int zcrypt_requestq_count(void)
 727 {
 728         struct zcrypt_card *zc;
 729         struct zcrypt_queue *zq;
 730         int requestq_count;
 731
 732         requestq_count = 0;
 733         spin_lock(&zcrypt_list_lock);
 734         for_each_zcrypt_card(zc) {
 735                 for_each_zcrypt_queue(zq, zc) {
 736                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 737                                 continue;
 738                         spin_lock(&zq->queue->lock);
 739                         requestq_count += zq->queue->requestq_count;
 740                         spin_unlock(&zq->queue->lock);
 741                 }
 742         }
 743         spin_unlock(&zcrypt_list_lock);
 744         return requestq_count;
 745 }
 746
 747 static int zcrypt_count_type(int type)
 748 {
 749         struct zcrypt_card *zc;
 750         struct zcrypt_queue *zq;
 751         int device_count;
 752
 753         device_count = 0;
 754         spin_lock(&zcrypt_list_lock);
 755         for_each_zcrypt_card(zc) {
 756                 if (zc->card->id != type)
 757                         continue;
 758                 for_each_zcrypt_queue(zq, zc) {
 759                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 760                                 continue;
 761                         device_count++;
 762                 }
 763         }
 764         spin_unlock(&zcrypt_list_lock);
 765         return device_count;
 766 }
 767
 768 /**
 769  * zcrypt_ica_status(): Old, depracted combi status call.
 770  *
 771  * Old, deprecated combi status call.
 772  */
 773 static long zcrypt_ica_status(struct file *filp, unsigned long arg)
 774 {
 775         struct ica_z90_status *pstat;
 776         int ret;
 777
 778         pstat = kzalloc(sizeof(*pstat), GFP_KERNEL);
 779         if (!pstat)
 780                 return -ENOMEM;
 781         pstat->totalcount = zcrypt_device_count;
 782         pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA);
 783         pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC);
 784         pstat->requestqWaitCount = zcrypt_requestq_count();
 785         pstat->pendingqWaitCount = zcrypt_pendingq_count();
 786         pstat->totalOpenCount = atomic_read(&zcrypt_open_count);
 787         pstat->cryptoDomain = ap_domain_index;
 788         zcrypt_status_mask(pstat->status);
 789         zcrypt_qdepth_mask(pstat->qdepth);
 790         ret = 0;
 791         if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat)))
 792                 ret = -EFAULT;
 793         kfree(pstat);
 794         return ret;
 795 }
 796
 797 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
 798                                   unsigned long arg)
 799 {
 800         int rc;
 801
 802         switch (cmd) {
 803         case ICARSAMODEXPO: {
 804                 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
 805                 struct ica_rsa_modexpo mex;
 806                 if (copy_from_user(&mex, umex, sizeof(mex)))
 807                         return -EFAULT;
 808                 do {
 809                         rc = zcrypt_rsa_modexpo(&mex);
 810                 } while (rc == -EAGAIN);
 811                 /* on failure: retry once again after a requested rescan */
 812                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
 813                         do {
 814                                 rc = zcrypt_rsa_modexpo(&mex);
 815                         } while (rc == -EAGAIN);
 816                 if (rc)
 817                         return rc;
 818                 return put_user(mex.outputdatalength, &umex->outputdatalength);
 819         }
 820         case ICARSACRT: {
 821                 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
 822                 struct ica_rsa_modexpo_crt crt;
 823                 if (copy_from_user(&crt, ucrt, sizeof(crt)))
 824                         return -EFAULT;
 825                 do {
 826                         rc = zcrypt_rsa_crt(&crt);
 827                 } while (rc == -EAGAIN);
 828                 /* on failure: retry once again after a requested rescan */
 829                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
 830                         do {
 831                                 rc = zcrypt_rsa_crt(&crt);
 832                         } while (rc == -EAGAIN);
 833                 if (rc)
 834                         return rc;
 835                 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
 836         }
 837         case ZSECSENDCPRB: {
 838                 struct ica_xcRB __user *uxcRB = (void __user *) arg;
 839                 struct ica_xcRB xcRB;
 840                 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
 841                         return -EFAULT;
 842                 do {
 843                         rc = zcrypt_send_cprb(&xcRB);
 844                 } while (rc == -EAGAIN);
 845                 /* on failure: retry once again after a requested rescan */
 846                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
 847                         do {
 848                                 rc = zcrypt_send_cprb(&xcRB);
 849                         } while (rc == -EAGAIN);
 850                 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
 851                         return -EFAULT;
 852                 return rc;
 853         }
 854         case ZSENDEP11CPRB: {
 855                 struct ep11_urb __user *uxcrb = (void __user *)arg;
 856                 struct ep11_urb xcrb;
 857                 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
 858                         return -EFAULT;
 859                 do {
 860                         rc = zcrypt_send_ep11_cprb(&xcrb);
 861                 } while (rc == -EAGAIN);
 862                 /* on failure: retry once again after a requested rescan */
 863                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
 864                         do {
 865                                 rc = zcrypt_send_ep11_cprb(&xcrb);
 866                         } while (rc == -EAGAIN);
 867                 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
 868                         return -EFAULT;
 869                 return rc;
 870         }
 871         case ZDEVICESTATUS: {
 872                 struct zcrypt_device_matrix *device_status;
 873
 874                 device_status = kzalloc(sizeof(struct zcrypt_device_matrix),
 875                                         GFP_KERNEL);
 876                 if (!device_status)
 877                         return -ENOMEM;
 878
 879                 zcrypt_device_status_mask(device_status);
 880
 881                 if (copy_to_user((char __user *) arg, device_status,
 882                                  sizeof(struct zcrypt_device_matrix))) {
 883                         kfree(device_status);
 884                         return -EFAULT;
 885                 }
 886
 887                 kfree(device_status);
 888                 return 0;
 889         }
 890         case Z90STAT_STATUS_MASK: {
 891                 char status[AP_DEVICES];
 892                 zcrypt_status_mask(status);
 893                 if (copy_to_user((char __user *) arg, status,
 894                                  sizeof(char) * AP_DEVICES))
 895                         return -EFAULT;
 896                 return 0;
 897         }
 898         case Z90STAT_QDEPTH_MASK: {
 899                 char qdepth[AP_DEVICES];
 900                 zcrypt_qdepth_mask(qdepth);
 901                 if (copy_to_user((char __user *) arg, qdepth,
 902                                  sizeof(char) * AP_DEVICES))
 903                         return -EFAULT;
 904                 return 0;
 905         }
 906         case Z90STAT_PERDEV_REQCNT: {
 907                 int reqcnt[AP_DEVICES];
 908                 zcrypt_perdev_reqcnt(reqcnt);
 909                 if (copy_to_user((int __user *) arg, reqcnt,
 910                                  sizeof(int) * AP_DEVICES))
 911                         return -EFAULT;
 912                 return 0;
 913         }
 914         case Z90STAT_REQUESTQ_COUNT:
 915                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
 916         case Z90STAT_PENDINGQ_COUNT:
 917                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
 918         case Z90STAT_TOTALOPEN_COUNT:
 919                 return put_user(atomic_read(&zcrypt_open_count),
 920                                 (int __user *) arg);
 921         case Z90STAT_DOMAIN_INDEX:
 922                 return put_user(ap_domain_index, (int __user *) arg);
 923         /*
 924          * Deprecated ioctls. Don't add another device count ioctl,
 925          * you can count them yourself in the user space with the
 926          * output of the Z90STAT_STATUS_MASK ioctl.
 927          */
 928         case ICAZ90STATUS:
 929                 return zcrypt_ica_status(filp, arg);
 930         case Z90STAT_TOTALCOUNT:
 931                 return put_user(zcrypt_device_count, (int __user *) arg);
 932         case Z90STAT_PCICACOUNT:
 933                 return put_user(zcrypt_count_type(ZCRYPT_PCICA),
 934                                 (int __user *) arg);
 935         case Z90STAT_PCICCCOUNT:
 936                 return put_user(zcrypt_count_type(ZCRYPT_PCICC),
 937                                 (int __user *) arg);
 938         case Z90STAT_PCIXCCMCL2COUNT:
 939                 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2),
 940                                 (int __user *) arg);
 941         case Z90STAT_PCIXCCMCL3COUNT:
 942                 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
 943                                 (int __user *) arg);
 944         case Z90STAT_PCIXCCCOUNT:
 945                 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) +
 946                                 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
 947                                 (int __user *) arg);
 948         case Z90STAT_CEX2CCOUNT:
 949                 return put_user(zcrypt_count_type(ZCRYPT_CEX2C),
 950                                 (int __user *) arg);
 951         case Z90STAT_CEX2ACOUNT:
 952                 return put_user(zcrypt_count_type(ZCRYPT_CEX2A),
 953                                 (int __user *) arg);
 954         default:
 955                 /* unknown ioctl number */
 956                 return -ENOIOCTLCMD;
 957         }
 958 }
 959
 960 #ifdef CONFIG_COMPAT
 961 /*
 962  * ioctl32 conversion routines
 963  */
 964 struct compat_ica_rsa_modexpo {
 965         compat_uptr_t   inputdata;
 966         unsigned int    inputdatalength;
 967         compat_uptr_t   outputdata;
 968         unsigned int    outputdatalength;
 969         compat_uptr_t   b_key;
 970         compat_uptr_t   n_modulus;
 971 };
 972
 973 static long trans_modexpo32(struct file *filp, unsigned int cmd,
 974                             unsigned long arg)
 975 {
 976         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
 977         struct compat_ica_rsa_modexpo mex32;
 978         struct ica_rsa_modexpo mex64;
 979         long rc;
 980
 981         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
 982                 return -EFAULT;
 983         mex64.inputdata = compat_ptr(mex32.inputdata);
 984         mex64.inputdatalength = mex32.inputdatalength;
 985         mex64.outputdata = compat_ptr(mex32.outputdata);
 986         mex64.outputdatalength = mex32.outputdatalength;
 987         mex64.b_key = compat_ptr(mex32.b_key);
 988         mex64.n_modulus = compat_ptr(mex32.n_modulus);
 989         do {
 990                 rc = zcrypt_rsa_modexpo(&mex64);
 991         } while (rc == -EAGAIN);
 992         /* on failure: retry once again after a requested rescan */
 993         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
 994                 do {
 995                         rc = zcrypt_rsa_modexpo(&mex64);
 996                 } while (rc == -EAGAIN);
 997         if (rc)
 998                 return rc;
 999         return put_user(mex64.outputdatalength,
1000                         &umex32->outputdatalength);
1001 }
1002
1003 struct compat_ica_rsa_modexpo_crt {
1004         compat_uptr_t   inputdata;
1005         unsigned int    inputdatalength;
1006         compat_uptr_t   outputdata;
1007         unsigned int    outputdatalength;
1008         compat_uptr_t   bp_key;
1009         compat_uptr_t   bq_key;
1010         compat_uptr_t   np_prime;
1011         compat_uptr_t   nq_prime;
1012         compat_uptr_t   u_mult_inv;
1013 };
1014
1015 static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
1016                                 unsigned long arg)
1017 {
1018         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1019         struct compat_ica_rsa_modexpo_crt crt32;
1020         struct ica_rsa_modexpo_crt crt64;
1021         long rc;
1022
1023         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1024                 return -EFAULT;
1025         crt64.inputdata = compat_ptr(crt32.inputdata);
1026         crt64.inputdatalength = crt32.inputdatalength;
1027         crt64.outputdata=  compat_ptr(crt32.outputdata);
1028         crt64.outputdatalength = crt32.outputdatalength;
1029         crt64.bp_key = compat_ptr(crt32.bp_key);
1030         crt64.bq_key = compat_ptr(crt32.bq_key);
1031         crt64.np_prime = compat_ptr(crt32.np_prime);
1032         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1033         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1034         do {
1035                 rc = zcrypt_rsa_crt(&crt64);
1036         } while (rc == -EAGAIN);
1037         /* on failure: retry once again after a requested rescan */
1038         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1039                 do {
1040                         rc = zcrypt_rsa_crt(&crt64);
1041                 } while (rc == -EAGAIN);
1042         if (rc)
1043                 return rc;
1044         return put_user(crt64.outputdatalength,
1045                         &ucrt32->outputdatalength);
1046 }
1047
1048 struct compat_ica_xcRB {
1049         unsigned short  agent_ID;
1050         unsigned int    user_defined;
1051         unsigned short  request_ID;
1052         unsigned int    request_control_blk_length;
1053         unsigned char   padding1[16 - sizeof (compat_uptr_t)];
1054         compat_uptr_t   request_control_blk_addr;
1055         unsigned int    request_data_length;
1056         char            padding2[16 - sizeof (compat_uptr_t)];
1057         compat_uptr_t   request_data_address;
1058         unsigned int    reply_control_blk_length;
1059         char            padding3[16 - sizeof (compat_uptr_t)];
1060         compat_uptr_t   reply_control_blk_addr;
1061         unsigned int    reply_data_length;
1062         char            padding4[16 - sizeof (compat_uptr_t)];
1063         compat_uptr_t   reply_data_addr;
1064         unsigned short  priority_window;
1065         unsigned int    status;
1066 } __attribute__((packed));
1067
1068 static long trans_xcRB32(struct file *filp, unsigned int cmd,
1069                          unsigned long arg)
1070 {
1071         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1072         struct compat_ica_xcRB xcRB32;
1073         struct ica_xcRB xcRB64;
1074         long rc;
1075
1076         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1077                 return -EFAULT;
1078         xcRB64.agent_ID = xcRB32.agent_ID;
1079         xcRB64.user_defined = xcRB32.user_defined;
1080         xcRB64.request_ID = xcRB32.request_ID;
1081         xcRB64.request_control_blk_length =
1082                 xcRB32.request_control_blk_length;
1083         xcRB64.request_control_blk_addr =
1084                 compat_ptr(xcRB32.request_control_blk_addr);
1085         xcRB64.request_data_length =
1086                 xcRB32.request_data_length;
1087         xcRB64.request_data_address =
1088                 compat_ptr(xcRB32.request_data_address);
1089         xcRB64.reply_control_blk_length =
1090                 xcRB32.reply_control_blk_length;
1091         xcRB64.reply_control_blk_addr =
1092                 compat_ptr(xcRB32.reply_control_blk_addr);
1093         xcRB64.reply_data_length = xcRB32.reply_data_length;
1094         xcRB64.reply_data_addr =
1095                 compat_ptr(xcRB32.reply_data_addr);
1096         xcRB64.priority_window = xcRB32.priority_window;
1097         xcRB64.status = xcRB32.status;
1098         do {
1099                 rc = zcrypt_send_cprb(&xcRB64);
1100         } while (rc == -EAGAIN);
1101         /* on failure: retry once again after a requested rescan */
1102         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1103                 do {
1104                         rc = zcrypt_send_cprb(&xcRB64);
1105                 } while (rc == -EAGAIN);
1106         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1107         xcRB32.reply_data_length = xcRB64.reply_data_length;
1108         xcRB32.status = xcRB64.status;
1109         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1110                         return -EFAULT;
1111         return rc;
1112 }
1113
1114 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1115                          unsigned long arg)
1116 {
1117         if (cmd == ICARSAMODEXPO)
1118                 return trans_modexpo32(filp, cmd, arg);
1119         if (cmd == ICARSACRT)
1120                 return trans_modexpo_crt32(filp, cmd, arg);
1121         if (cmd == ZSECSENDCPRB)
1122                 return trans_xcRB32(filp, cmd, arg);
1123         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1124 }
1125 #endif
1126
1127 /*
1128  * Misc device file operations.
1129  */
1130 static const struct file_operations zcrypt_fops = {
1131         .owner          = THIS_MODULE,
1132         .read           = zcrypt_read,
1133         .write          = zcrypt_write,
1134         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1135 #ifdef CONFIG_COMPAT
1136         .compat_ioctl   = zcrypt_compat_ioctl,
1137 #endif
1138         .open           = zcrypt_open,
1139         .release        = zcrypt_release,
1140         .llseek         = no_llseek,
1141 };
1142
1143 /*
1144  * Misc device.
1145  */
1146 static struct miscdevice zcrypt_misc_device = {
1147         .minor      = MISC_DYNAMIC_MINOR,
1148         .name       = "z90crypt",
1149         .fops       = &zcrypt_fops,
1150 };
1151
1152 /*
1153  * Deprecated /proc entry support.
1154  */
1155 static struct proc_dir_entry *zcrypt_entry;
1156
1157 static void sprintcl(struct seq_file *m, unsigned char *addr, unsigned int len)
1158 {
1159         int i;
1160
1161         for (i = 0; i < len; i++)
1162                 seq_printf(m, "%01x", (unsigned int) addr[i]);
1163         seq_putc(m, ' ');
1164 }
1165
1166 static void sprintrw(struct seq_file *m, unsigned char *addr, unsigned int len)
1167 {
1168         int inl, c, cx;
1169
1170         seq_printf(m, "    ");
1171         inl = 0;
1172         for (c = 0; c < (len / 16); c++) {
1173                 sprintcl(m, addr+inl, 16);
1174                 inl += 16;
1175         }
1176         cx = len%16;
1177         if (cx) {
1178                 sprintcl(m, addr+inl, cx);
1179                 inl += cx;
1180         }
1181         seq_putc(m, '\n');
1182 }
1183
1184 static void sprinthx(unsigned char *title, struct seq_file *m,
1185                      unsigned char *addr, unsigned int len)
1186 {
1187         int inl, r, rx;
1188
1189         seq_printf(m, "\n%s\n", title);
1190         inl = 0;
1191         for (r = 0; r < (len / 64); r++) {
1192                 sprintrw(m, addr+inl, 64);
1193                 inl += 64;
1194         }
1195         rx = len % 64;
1196         if (rx) {
1197                 sprintrw(m, addr+inl, rx);
1198                 inl += rx;
1199         }
1200         seq_putc(m, '\n');
1201 }
1202
1203 static void sprinthx4(unsigned char *title, struct seq_file *m,
1204                       unsigned int *array, unsigned int len)
1205 {
1206         seq_printf(m, "\n%s\n", title);
1207         seq_hex_dump(m, "    ", DUMP_PREFIX_NONE, 32, 4, array, len, false);
1208         seq_putc(m, '\n');
1209 }
1210
1211 static int zcrypt_proc_show(struct seq_file *m, void *v)
1212 {
1213         char workarea[sizeof(int) * AP_DEVICES];
1214
1215         seq_printf(m, "\nzcrypt version: %d.%d.%d\n",
1216                    ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT);
1217         seq_printf(m, "Cryptographic domain: %d\n", ap_domain_index);
1218         seq_printf(m, "Total device count: %d\n", zcrypt_device_count);
1219         seq_printf(m, "PCICA count: %d\n", zcrypt_count_type(ZCRYPT_PCICA));
1220         seq_printf(m, "PCICC count: %d\n", zcrypt_count_type(ZCRYPT_PCICC));
1221         seq_printf(m, "PCIXCC MCL2 count: %d\n",
1222                    zcrypt_count_type(ZCRYPT_PCIXCC_MCL2));
1223         seq_printf(m, "PCIXCC MCL3 count: %d\n",
1224                    zcrypt_count_type(ZCRYPT_PCIXCC_MCL3));
1225         seq_printf(m, "CEX2C count: %d\n", zcrypt_count_type(ZCRYPT_CEX2C));
1226         seq_printf(m, "CEX2A count: %d\n", zcrypt_count_type(ZCRYPT_CEX2A));
1227         seq_printf(m, "CEX3C count: %d\n", zcrypt_count_type(ZCRYPT_CEX3C));
1228         seq_printf(m, "CEX3A count: %d\n", zcrypt_count_type(ZCRYPT_CEX3A));
1229         seq_printf(m, "requestq count: %d\n", zcrypt_requestq_count());
1230         seq_printf(m, "pendingq count: %d\n", zcrypt_pendingq_count());
1231         seq_printf(m, "Total open handles: %d\n\n",
1232                    atomic_read(&zcrypt_open_count));
1233         zcrypt_status_mask(workarea);
1234         sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) "
1235                  "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A",
1236                  m, workarea, AP_DEVICES);
1237         zcrypt_qdepth_mask(workarea);
1238         sprinthx("Waiting work element counts", m, workarea, AP_DEVICES);
1239         zcrypt_perdev_reqcnt((int *) workarea);
1240         sprinthx4("Per-device successfully completed request counts",
1241                   m, (unsigned int *) workarea, AP_DEVICES);
1242         return 0;
1243 }
1244
1245 static int zcrypt_proc_open(struct inode *inode, struct file *file)
1246 {
1247         return single_open(file, zcrypt_proc_show, NULL);
1248 }
1249
1250 static void zcrypt_disable_card(int index)
1251 {
1252         struct zcrypt_card *zc;
1253         struct zcrypt_queue *zq;
1254
1255         spin_lock(&zcrypt_list_lock);
1256         for_each_zcrypt_card(zc) {
1257                 for_each_zcrypt_queue(zq, zc) {
1258                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1259                                 continue;
1260                         zq->online = 0;
1261                         ap_flush_queue(zq->queue);
1262                 }
1263         }
1264         spin_unlock(&zcrypt_list_lock);
1265 }
1266
1267 static void zcrypt_enable_card(int index)
1268 {
1269         struct zcrypt_card *zc;
1270         struct zcrypt_queue *zq;
1271
1272         spin_lock(&zcrypt_list_lock);
1273         for_each_zcrypt_card(zc) {
1274                 for_each_zcrypt_queue(zq, zc) {
1275                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1276                                 continue;
1277                         zq->online = 1;
1278                         ap_flush_queue(zq->queue);
1279                 }
1280         }
1281         spin_unlock(&zcrypt_list_lock);
1282 }
1283
1284 static ssize_t zcrypt_proc_write(struct file *file, const char __user *buffer,
1285                                  size_t count, loff_t *pos)
1286 {
1287         unsigned char *lbuf, *ptr;
1288         size_t local_count;
1289         int j;
1290
1291         if (count <= 0)
1292                 return 0;
1293
1294 #define LBUFSIZE 1200UL
1295         lbuf = kmalloc(LBUFSIZE, GFP_KERNEL);
1296         if (!lbuf)
1297                 return 0;
1298
1299         local_count = min(LBUFSIZE - 1, count);
1300         if (copy_from_user(lbuf, buffer, local_count) != 0) {
1301                 kfree(lbuf);
1302                 return -EFAULT;
1303         }
1304         lbuf[local_count] = '\0';
1305
1306         ptr = strstr(lbuf, "Online devices");
1307         if (!ptr)
1308                 goto out;
1309         ptr = strstr(ptr, "\n");
1310         if (!ptr)
1311                 goto out;
1312         ptr++;
1313
1314         if (strstr(ptr, "Waiting work element counts") == NULL)
1315                 goto out;
1316
1317         for (j = 0; j < 64 && *ptr; ptr++) {
1318                 /*
1319                  * '0' for no device, '1' for PCICA, '2' for PCICC,
1320                  * '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3,
1321                  * '5' for CEX2C and '6' for CEX2A'
1322                  * '7' for CEX3C and '8' for CEX3A
1323                  */
1324                 if (*ptr >= '0' && *ptr <= '8')
1325                         j++;
1326                 else if (*ptr == 'd' || *ptr == 'D')
1327                         zcrypt_disable_card(j++);
1328                 else if (*ptr == 'e' || *ptr == 'E')
1329                         zcrypt_enable_card(j++);
1330                 else if (*ptr != ' ' && *ptr != '\t')
1331                         break;
1332         }
1333 out:
1334         kfree(lbuf);
1335         return count;
1336 }
1337
1338 static const struct file_operations zcrypt_proc_fops = {
1339         .owner          = THIS_MODULE,
1340         .open           = zcrypt_proc_open,
1341         .read           = seq_read,
1342         .llseek         = seq_lseek,
1343         .release        = single_release,
1344         .write          = zcrypt_proc_write,
1345 };
1346
1347 static int zcrypt_rng_device_count;
1348 static u32 *zcrypt_rng_buffer;
1349 static int zcrypt_rng_buffer_index;
1350 static DEFINE_MUTEX(zcrypt_rng_mutex);
1351
1352 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1353 {
1354         int rc;
1355
1356         /*
1357          * We don't need locking here because the RNG API guarantees serialized
1358          * read method calls.
1359          */
1360         if (zcrypt_rng_buffer_index == 0) {
1361                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1362                 /* on failure: retry once again after a requested rescan */
1363                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1364                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1365                 if (rc < 0)
1366                         return -EIO;
1367                 zcrypt_rng_buffer_index = rc / sizeof *data;
1368         }
1369         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1370         return sizeof *data;
1371 }
1372
1373 static struct hwrng zcrypt_rng_dev = {
1374         .name           = "zcrypt",
1375         .data_read      = zcrypt_rng_data_read,
1376         .quality        = 990,
1377 };
1378
1379 int zcrypt_rng_device_add(void)
1380 {
1381         int rc = 0;
1382
1383         mutex_lock(&zcrypt_rng_mutex);
1384         if (zcrypt_rng_device_count == 0) {
1385                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1386                 if (!zcrypt_rng_buffer) {
1387                         rc = -ENOMEM;
1388                         goto out;
1389                 }
1390                 zcrypt_rng_buffer_index = 0;
1391                 if (!zcrypt_hwrng_seed)
1392                         zcrypt_rng_dev.quality = 0;
1393                 rc = hwrng_register(&zcrypt_rng_dev);
1394                 if (rc)
1395                         goto out_free;
1396                 zcrypt_rng_device_count = 1;
1397         } else
1398                 zcrypt_rng_device_count++;
1399         mutex_unlock(&zcrypt_rng_mutex);
1400         return 0;
1401
1402 out_free:
1403         free_page((unsigned long) zcrypt_rng_buffer);
1404 out:
1405         mutex_unlock(&zcrypt_rng_mutex);
1406         return rc;
1407 }
1408
1409 void zcrypt_rng_device_remove(void)
1410 {
1411         mutex_lock(&zcrypt_rng_mutex);
1412         zcrypt_rng_device_count--;
1413         if (zcrypt_rng_device_count == 0) {
1414                 hwrng_unregister(&zcrypt_rng_dev);
1415                 free_page((unsigned long) zcrypt_rng_buffer);
1416         }
1417         mutex_unlock(&zcrypt_rng_mutex);
1418 }
1419
1420 int __init zcrypt_debug_init(void)
1421 {
1422         zcrypt_dbf_root = debugfs_create_dir("zcrypt", NULL);
1423         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1424                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
1425         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1426         debug_set_level(zcrypt_dbf_info, DBF_ERR);
1427
1428         return 0;
1429 }
1430
1431 void zcrypt_debug_exit(void)
1432 {
1433         debugfs_remove(zcrypt_dbf_root);
1434         debug_unregister(zcrypt_dbf_info);
1435 }
1436
1437 /**
1438  * zcrypt_api_init(): Module initialization.
1439  *
1440  * The module initialization code.
1441  */
1442 int __init zcrypt_api_init(void)
1443 {
1444         int rc;
1445
1446         rc = zcrypt_debug_init();
1447         if (rc)
1448                 goto out;
1449
1450         atomic_set(&zcrypt_rescan_req, 0);
1451
1452         /* Register the request sprayer. */
1453         rc = misc_register(&zcrypt_misc_device);
1454         if (rc < 0)
1455                 goto out;
1456
1457         /* Set up the proc file system */
1458         zcrypt_entry = proc_create("driver/z90crypt", 0644, NULL,
1459                                    &zcrypt_proc_fops);
1460         if (!zcrypt_entry) {
1461                 rc = -ENOMEM;
1462                 goto out_misc;
1463         }
1464
1465         zcrypt_msgtype6_init();
1466         zcrypt_msgtype50_init();
1467         return 0;
1468
1469 out_misc:
1470         misc_deregister(&zcrypt_misc_device);
1471 out:
1472         return rc;
1473 }
1474
1475 /**
1476  * zcrypt_api_exit(): Module termination.
1477  *
1478  * The module termination code.
1479  */
1480 void __exit zcrypt_api_exit(void)
1481 {
1482         remove_proc_entry("driver/z90crypt", NULL);
1483         misc_deregister(&zcrypt_misc_device);
1484         zcrypt_msgtype6_exit();
1485         zcrypt_msgtype50_exit();
1486         zcrypt_debug_exit();
1487 }
1488
1489 module_init(zcrypt_api_init);
1490 module_exit(zcrypt_api_exit);