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 debug_info_t *zcrypt_dbf_info;
  85
  86 /**
  87  * Process a rescan of the transport layer.
  88  *
  89  * Returns 1, if the rescan has been processed, otherwise 0.
  90  */
  91 static inline int zcrypt_process_rescan(void)
  92 {
  93         if (atomic_read(&zcrypt_rescan_req)) {
  94                 atomic_set(&zcrypt_rescan_req, 0);
  95                 atomic_inc(&zcrypt_rescan_count);
  96                 ap_bus_force_rescan();
  97                 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
  98                            atomic_inc_return(&zcrypt_rescan_count));
  99                 return 1;
 100         }
 101         return 0;
 102 }
 103
 104 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
 105 {
 106         list_add_tail(&zops->list, &zcrypt_ops_list);
 107 }
 108
 109 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
 110 {
 111         list_del_init(&zops->list);
 112 }
 113
 114 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
 115 {
 116         struct zcrypt_ops *zops;
 117
 118         list_for_each_entry(zops, &zcrypt_ops_list, list)
 119                 if ((zops->variant == variant) &&
 120                     (!strncmp(zops->name, name, sizeof(zops->name))))
 121                         return zops;
 122         return NULL;
 123 }
 124 EXPORT_SYMBOL(zcrypt_msgtype);
 125
 126 /**
 127  * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
 128  *
 129  * This function is not supported beyond zcrypt 1.3.1.
 130  */
 131 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
 132                            size_t count, loff_t *f_pos)
 133 {
 134         return -EPERM;
 135 }
 136
 137 /**
 138  * zcrypt_write(): Not allowed.
 139  *
 140  * Write is is not allowed
 141  */
 142 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
 143                             size_t count, loff_t *f_pos)
 144 {
 145         return -EPERM;
 146 }
 147
 148 /**
 149  * zcrypt_open(): Count number of users.
 150  *
 151  * Device open function to count number of users.
 152  */
 153 static int zcrypt_open(struct inode *inode, struct file *filp)
 154 {
 155         atomic_inc(&zcrypt_open_count);
 156         return nonseekable_open(inode, filp);
 157 }
 158
 159 /**
 160  * zcrypt_release(): Count number of users.
 161  *
 162  * Device close function to count number of users.
 163  */
 164 static int zcrypt_release(struct inode *inode, struct file *filp)
 165 {
 166         atomic_dec(&zcrypt_open_count);
 167         return 0;
 168 }
 169
 170 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
 171                                                      struct zcrypt_queue *zq,
 172                                                      unsigned int weight)
 173 {
 174         if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
 175                 return NULL;
 176         zcrypt_queue_get(zq);
 177         get_device(&zq->queue->ap_dev.device);
 178         atomic_add(weight, &zc->load);
 179         atomic_add(weight, &zq->load);
 180         zq->request_count++;
 181         return zq;
 182 }
 183
 184 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
 185                                      struct zcrypt_queue *zq,
 186                                      unsigned int weight)
 187 {
 188         struct module *mod = zq->queue->ap_dev.drv->driver.owner;
 189
 190         zq->request_count--;
 191         atomic_sub(weight, &zc->load);
 192         atomic_sub(weight, &zq->load);
 193         put_device(&zq->queue->ap_dev.device);
 194         zcrypt_queue_put(zq);
 195         module_put(mod);
 196 }
 197
 198 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
 199                                        struct zcrypt_card *pref_zc,
 200                                        unsigned weight, unsigned pref_weight)
 201 {
 202         if (!pref_zc)
 203                 return false;
 204         weight += atomic_read(&zc->load);
 205         pref_weight += atomic_read(&pref_zc->load);
 206         if (weight == pref_weight)
 207                 return atomic_read(&zc->card->total_request_count) >
 208                         atomic_read(&pref_zc->card->total_request_count);
 209         return weight > pref_weight;
 210 }
 211
 212 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
 213                                         struct zcrypt_queue *pref_zq,
 214                                         unsigned weight, unsigned pref_weight)
 215 {
 216         if (!pref_zq)
 217                 return false;
 218         weight += atomic_read(&zq->load);
 219         pref_weight += atomic_read(&pref_zq->load);
 220         if (weight == pref_weight)
 221                 return &zq->queue->total_request_count >
 222                         &pref_zq->queue->total_request_count;
 223         return weight > pref_weight;
 224 }
 225
 226 /*
 227  * zcrypt ioctls.
 228  */
 229 static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
 230 {
 231         struct zcrypt_card *zc, *pref_zc;
 232         struct zcrypt_queue *zq, *pref_zq;
 233         unsigned int weight, pref_weight;
 234         unsigned int func_code;
 235         int qid = 0, rc = -ENODEV;
 236
 237         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
 238
 239         if (mex->outputdatalength < mex->inputdatalength) {
 240                 rc = -EINVAL;
 241                 goto out;
 242         }
 243
 244         /*
 245          * As long as outputdatalength is big enough, we can set the
 246          * outputdatalength equal to the inputdatalength, since that is the
 247          * number of bytes we will copy in any case
 248          */
 249         mex->outputdatalength = mex->inputdatalength;
 250
 251         rc = get_rsa_modex_fc(mex, &func_code);
 252         if (rc)
 253                 goto out;
 254
 255         pref_zc = NULL;
 256         pref_zq = NULL;
 257         spin_lock(&zcrypt_list_lock);
 258         for_each_zcrypt_card(zc) {
 259                 /* Check for online accelarator and CCA cards */
 260                 if (!zc->online || !(zc->card->functions & 0x18000000))
 261                         continue;
 262                 /* Check for size limits */
 263                 if (zc->min_mod_size > mex->inputdatalength ||
 264                     zc->max_mod_size < mex->inputdatalength)
 265                         continue;
 266                 /* get weight index of the card device  */
 267                 weight = zc->speed_rating[func_code];
 268                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 269                         continue;
 270                 for_each_zcrypt_queue(zq, zc) {
 271                         /* check if device is online and eligible */
 272                         if (!zq->online || !zq->ops->rsa_modexpo)
 273                                 continue;
 274                         if (zcrypt_queue_compare(zq, pref_zq,
 275                                                  weight, pref_weight))
 276                                 continue;
 277                         pref_zc = zc;
 278                         pref_zq = zq;
 279                         pref_weight = weight;
 280                 }
 281         }
 282         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
 283         spin_unlock(&zcrypt_list_lock);
 284
 285         if (!pref_zq) {
 286                 rc = -ENODEV;
 287                 goto out;
 288         }
 289
 290         qid = pref_zq->queue->qid;
 291         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
 292
 293         spin_lock(&zcrypt_list_lock);
 294         zcrypt_drop_queue(pref_zc, pref_zq, weight);
 295         spin_unlock(&zcrypt_list_lock);
 296
 297 out:
 298         trace_s390_zcrypt_rep(mex, func_code, rc,
 299                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 300         return rc;
 301 }
 302
 303 static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
 304 {
 305         struct zcrypt_card *zc, *pref_zc;
 306         struct zcrypt_queue *zq, *pref_zq;
 307         unsigned int weight, pref_weight;
 308         unsigned int func_code;
 309         int qid = 0, rc = -ENODEV;
 310
 311         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
 312
 313         if (crt->outputdatalength < crt->inputdatalength) {
 314                 rc = -EINVAL;
 315                 goto out;
 316         }
 317
 318         /*
 319          * As long as outputdatalength is big enough, we can set the
 320          * outputdatalength equal to the inputdatalength, since that is the
 321          * number of bytes we will copy in any case
 322          */
 323         crt->outputdatalength = crt->inputdatalength;
 324
 325         rc = get_rsa_crt_fc(crt, &func_code);
 326         if (rc)
 327                 goto out;
 328
 329         pref_zc = NULL;
 330         pref_zq = NULL;
 331         spin_lock(&zcrypt_list_lock);
 332         for_each_zcrypt_card(zc) {
 333                 /* Check for online accelarator and CCA cards */
 334                 if (!zc->online || !(zc->card->functions & 0x18000000))
 335                         continue;
 336                 /* Check for size limits */
 337                 if (zc->min_mod_size > crt->inputdatalength ||
 338                     zc->max_mod_size < crt->inputdatalength)
 339                         continue;
 340                 /* get weight index of the card device  */
 341                 weight = zc->speed_rating[func_code];
 342                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 343                         continue;
 344                 for_each_zcrypt_queue(zq, zc) {
 345                         /* check if device is online and eligible */
 346                         if (!zq->online || !zq->ops->rsa_modexpo_crt)
 347                                 continue;
 348                         if (zcrypt_queue_compare(zq, pref_zq,
 349                                                  weight, pref_weight))
 350                                 continue;
 351                         pref_zc = zc;
 352                         pref_zq = zq;
 353                         pref_weight = weight;
 354                 }
 355         }
 356         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
 357         spin_unlock(&zcrypt_list_lock);
 358
 359         if (!pref_zq) {
 360                 rc = -ENODEV;
 361                 goto out;
 362         }
 363
 364         qid = pref_zq->queue->qid;
 365         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
 366
 367         spin_lock(&zcrypt_list_lock);
 368         zcrypt_drop_queue(pref_zc, pref_zq, weight);
 369         spin_unlock(&zcrypt_list_lock);
 370
 371 out:
 372         trace_s390_zcrypt_rep(crt, func_code, rc,
 373                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 374         return rc;
 375 }
 376
 377 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
 378 {
 379         struct zcrypt_card *zc, *pref_zc;
 380         struct zcrypt_queue *zq, *pref_zq;
 381         struct ap_message ap_msg;
 382         unsigned int weight, pref_weight;
 383         unsigned int func_code;
 384         unsigned short *domain;
 385         int qid = 0, rc = -ENODEV;
 386
 387         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
 388
 389         rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
 390         if (rc)
 391                 goto out;
 392
 393         pref_zc = NULL;
 394         pref_zq = NULL;
 395         spin_lock(&zcrypt_list_lock);
 396         for_each_zcrypt_card(zc) {
 397                 /* Check for online CCA cards */
 398                 if (!zc->online || !(zc->card->functions & 0x10000000))
 399                         continue;
 400                 /* Check for user selected CCA card */
 401                 if (xcRB->user_defined != AUTOSELECT &&
 402                     xcRB->user_defined != zc->card->id)
 403                         continue;
 404                 /* get weight index of the card device  */
 405                 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 406                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 407                         continue;
 408                 for_each_zcrypt_queue(zq, zc) {
 409                         /* check if device is online and eligible */
 410                         if (!zq->online ||
 411                             !zq->ops->send_cprb ||
 412                             ((*domain != (unsigned short) AUTOSELECT) &&
 413                              (*domain != AP_QID_QUEUE(zq->queue->qid))))
 414                                 continue;
 415                         if (zcrypt_queue_compare(zq, pref_zq,
 416                                                  weight, pref_weight))
 417                                 continue;
 418                         pref_zc = zc;
 419                         pref_zq = zq;
 420                         pref_weight = weight;
 421                 }
 422         }
 423         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
 424         spin_unlock(&zcrypt_list_lock);
 425
 426         if (!pref_zq) {
 427                 rc = -ENODEV;
 428                 goto out;
 429         }
 430
 431         /* in case of auto select, provide the correct domain */
 432         qid = pref_zq->queue->qid;
 433         if (*domain == (unsigned short) AUTOSELECT)
 434                 *domain = AP_QID_QUEUE(qid);
 435
 436         rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
 437
 438         spin_lock(&zcrypt_list_lock);
 439         zcrypt_drop_queue(pref_zc, pref_zq, weight);
 440         spin_unlock(&zcrypt_list_lock);
 441
 442 out:
 443         trace_s390_zcrypt_rep(xcRB, func_code, rc,
 444                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 445         return rc;
 446 }
 447 EXPORT_SYMBOL(zcrypt_send_cprb);
 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 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         local_bh_disable();
 672         for_each_zcrypt_card(zc) {
 673                 for_each_zcrypt_queue(zq, zc) {
 674                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 675                                 continue;
 676                         spin_lock(&zq->queue->lock);
 677                         qdepth[AP_QID_CARD(zq->queue->qid)] =
 678                                 zq->queue->pendingq_count +
 679                                 zq->queue->requestq_count;
 680                         spin_unlock(&zq->queue->lock);
 681                 }
 682         }
 683         local_bh_enable();
 684         spin_unlock(&zcrypt_list_lock);
 685 }
 686
 687 static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES])
 688 {
 689         struct zcrypt_card *zc;
 690         struct zcrypt_queue *zq;
 691
 692         memset(reqcnt, 0, sizeof(int) * AP_DEVICES);
 693         spin_lock(&zcrypt_list_lock);
 694         local_bh_disable();
 695         for_each_zcrypt_card(zc) {
 696                 for_each_zcrypt_queue(zq, zc) {
 697                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 698                                 continue;
 699                         spin_lock(&zq->queue->lock);
 700                         reqcnt[AP_QID_CARD(zq->queue->qid)] =
 701                                 zq->queue->total_request_count;
 702                         spin_unlock(&zq->queue->lock);
 703                 }
 704         }
 705         local_bh_enable();
 706         spin_unlock(&zcrypt_list_lock);
 707 }
 708
 709 static int zcrypt_pendingq_count(void)
 710 {
 711         struct zcrypt_card *zc;
 712         struct zcrypt_queue *zq;
 713         int pendingq_count;
 714
 715         pendingq_count = 0;
 716         spin_lock(&zcrypt_list_lock);
 717         local_bh_disable();
 718         for_each_zcrypt_card(zc) {
 719                 for_each_zcrypt_queue(zq, zc) {
 720                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 721                                 continue;
 722                         spin_lock(&zq->queue->lock);
 723                         pendingq_count += zq->queue->pendingq_count;
 724                         spin_unlock(&zq->queue->lock);
 725                 }
 726         }
 727         local_bh_enable();
 728         spin_unlock(&zcrypt_list_lock);
 729         return pendingq_count;
 730 }
 731
 732 static int zcrypt_requestq_count(void)
 733 {
 734         struct zcrypt_card *zc;
 735         struct zcrypt_queue *zq;
 736         int requestq_count;
 737
 738         requestq_count = 0;
 739         spin_lock(&zcrypt_list_lock);
 740         local_bh_disable();
 741         for_each_zcrypt_card(zc) {
 742                 for_each_zcrypt_queue(zq, zc) {
 743                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 744                                 continue;
 745                         spin_lock(&zq->queue->lock);
 746                         requestq_count += zq->queue->requestq_count;
 747                         spin_unlock(&zq->queue->lock);
 748                 }
 749         }
 750         local_bh_enable();
 751         spin_unlock(&zcrypt_list_lock);
 752         return requestq_count;
 753 }
 754
 755 static int zcrypt_count_type(int type)
 756 {
 757         struct zcrypt_card *zc;
 758         struct zcrypt_queue *zq;
 759         int device_count;
 760
 761         device_count = 0;
 762         spin_lock(&zcrypt_list_lock);
 763         for_each_zcrypt_card(zc) {
 764                 if (zc->card->id != type)
 765                         continue;
 766                 for_each_zcrypt_queue(zq, zc) {
 767                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 768                                 continue;
 769                         device_count++;
 770                 }
 771         }
 772         spin_unlock(&zcrypt_list_lock);
 773         return device_count;
 774 }
 775
 776 /**
 777  * zcrypt_ica_status(): Old, depracted combi status call.
 778  *
 779  * Old, deprecated combi status call.
 780  */
 781 static long zcrypt_ica_status(struct file *filp, unsigned long arg)
 782 {
 783         struct ica_z90_status *pstat;
 784         int ret;
 785
 786         pstat = kzalloc(sizeof(*pstat), GFP_KERNEL);
 787         if (!pstat)
 788                 return -ENOMEM;
 789         pstat->totalcount = zcrypt_device_count;
 790         pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA);
 791         pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC);
 792         pstat->requestqWaitCount = zcrypt_requestq_count();
 793         pstat->pendingqWaitCount = zcrypt_pendingq_count();
 794         pstat->totalOpenCount = atomic_read(&zcrypt_open_count);
 795         pstat->cryptoDomain = ap_domain_index;
 796         zcrypt_status_mask(pstat->status);
 797         zcrypt_qdepth_mask(pstat->qdepth);
 798         ret = 0;
 799         if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat)))
 800                 ret = -EFAULT;
 801         kfree(pstat);
 802         return ret;
 803 }
 804
 805 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
 806                                   unsigned long arg)
 807 {
 808         int rc;
 809
 810         switch (cmd) {
 811         case ICARSAMODEXPO: {
 812                 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
 813                 struct ica_rsa_modexpo mex;
 814                 if (copy_from_user(&mex, umex, sizeof(mex)))
 815                         return -EFAULT;
 816                 do {
 817                         rc = zcrypt_rsa_modexpo(&mex);
 818                 } while (rc == -EAGAIN);
 819                 /* on failure: retry once again after a requested rescan */
 820                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
 821                         do {
 822                                 rc = zcrypt_rsa_modexpo(&mex);
 823                         } while (rc == -EAGAIN);
 824                 if (rc) {
 825                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
 826                         return rc;
 827                 }
 828                 return put_user(mex.outputdatalength, &umex->outputdatalength);
 829         }
 830         case ICARSACRT: {
 831                 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
 832                 struct ica_rsa_modexpo_crt crt;
 833                 if (copy_from_user(&crt, ucrt, sizeof(crt)))
 834                         return -EFAULT;
 835                 do {
 836                         rc = zcrypt_rsa_crt(&crt);
 837                 } while (rc == -EAGAIN);
 838                 /* on failure: retry once again after a requested rescan */
 839                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
 840                         do {
 841                                 rc = zcrypt_rsa_crt(&crt);
 842                         } while (rc == -EAGAIN);
 843                 if (rc) {
 844                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
 845                         return rc;
 846                 }
 847                 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
 848         }
 849         case ZSECSENDCPRB: {
 850                 struct ica_xcRB __user *uxcRB = (void __user *) arg;
 851                 struct ica_xcRB xcRB;
 852                 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
 853                         return -EFAULT;
 854                 do {
 855                         rc = zcrypt_send_cprb(&xcRB);
 856                 } while (rc == -EAGAIN);
 857                 /* on failure: retry once again after a requested rescan */
 858                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
 859                         do {
 860                                 rc = zcrypt_send_cprb(&xcRB);
 861                         } while (rc == -EAGAIN);
 862                 if (rc)
 863                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d\n", rc);
 864                 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
 865                         return -EFAULT;
 866                 return rc;
 867         }
 868         case ZSENDEP11CPRB: {
 869                 struct ep11_urb __user *uxcrb = (void __user *)arg;
 870                 struct ep11_urb xcrb;
 871                 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
 872                         return -EFAULT;
 873                 do {
 874                         rc = zcrypt_send_ep11_cprb(&xcrb);
 875                 } while (rc == -EAGAIN);
 876                 /* on failure: retry once again after a requested rescan */
 877                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
 878                         do {
 879                                 rc = zcrypt_send_ep11_cprb(&xcrb);
 880                         } while (rc == -EAGAIN);
 881                 if (rc)
 882                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
 883                 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
 884                         return -EFAULT;
 885                 return rc;
 886         }
 887         case ZDEVICESTATUS: {
 888                 struct zcrypt_device_matrix *device_status;
 889
 890                 device_status = kzalloc(sizeof(struct zcrypt_device_matrix),
 891                                         GFP_KERNEL);
 892                 if (!device_status)
 893                         return -ENOMEM;
 894
 895                 zcrypt_device_status_mask(device_status);
 896
 897                 if (copy_to_user((char __user *) arg, device_status,
 898                                  sizeof(struct zcrypt_device_matrix))) {
 899                         kfree(device_status);
 900                         return -EFAULT;
 901                 }
 902
 903                 kfree(device_status);
 904                 return 0;
 905         }
 906         case Z90STAT_STATUS_MASK: {
 907                 char status[AP_DEVICES];
 908                 zcrypt_status_mask(status);
 909                 if (copy_to_user((char __user *) arg, status,
 910                                  sizeof(char) * AP_DEVICES))
 911                         return -EFAULT;
 912                 return 0;
 913         }
 914         case Z90STAT_QDEPTH_MASK: {
 915                 char qdepth[AP_DEVICES];
 916                 zcrypt_qdepth_mask(qdepth);
 917                 if (copy_to_user((char __user *) arg, qdepth,
 918                                  sizeof(char) * AP_DEVICES))
 919                         return -EFAULT;
 920                 return 0;
 921         }
 922         case Z90STAT_PERDEV_REQCNT: {
 923                 int reqcnt[AP_DEVICES];
 924                 zcrypt_perdev_reqcnt(reqcnt);
 925                 if (copy_to_user((int __user *) arg, reqcnt,
 926                                  sizeof(int) * AP_DEVICES))
 927                         return -EFAULT;
 928                 return 0;
 929         }
 930         case Z90STAT_REQUESTQ_COUNT:
 931                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
 932         case Z90STAT_PENDINGQ_COUNT:
 933                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
 934         case Z90STAT_TOTALOPEN_COUNT:
 935                 return put_user(atomic_read(&zcrypt_open_count),
 936                                 (int __user *) arg);
 937         case Z90STAT_DOMAIN_INDEX:
 938                 return put_user(ap_domain_index, (int __user *) arg);
 939         /*
 940          * Deprecated ioctls. Don't add another device count ioctl,
 941          * you can count them yourself in the user space with the
 942          * output of the Z90STAT_STATUS_MASK ioctl.
 943          */
 944         case ICAZ90STATUS:
 945                 return zcrypt_ica_status(filp, arg);
 946         case Z90STAT_TOTALCOUNT:
 947                 return put_user(zcrypt_device_count, (int __user *) arg);
 948         case Z90STAT_PCICACOUNT:
 949                 return put_user(zcrypt_count_type(ZCRYPT_PCICA),
 950                                 (int __user *) arg);
 951         case Z90STAT_PCICCCOUNT:
 952                 return put_user(zcrypt_count_type(ZCRYPT_PCICC),
 953                                 (int __user *) arg);
 954         case Z90STAT_PCIXCCMCL2COUNT:
 955                 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2),
 956                                 (int __user *) arg);
 957         case Z90STAT_PCIXCCMCL3COUNT:
 958                 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
 959                                 (int __user *) arg);
 960         case Z90STAT_PCIXCCCOUNT:
 961                 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) +
 962                                 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
 963                                 (int __user *) arg);
 964         case Z90STAT_CEX2CCOUNT:
 965                 return put_user(zcrypt_count_type(ZCRYPT_CEX2C),
 966                                 (int __user *) arg);
 967         case Z90STAT_CEX2ACOUNT:
 968                 return put_user(zcrypt_count_type(ZCRYPT_CEX2A),
 969                                 (int __user *) arg);
 970         default:
 971                 /* unknown ioctl number */
 972                 return -ENOIOCTLCMD;
 973         }
 974 }
 975
 976 #ifdef CONFIG_COMPAT
 977 /*
 978  * ioctl32 conversion routines
 979  */
 980 struct compat_ica_rsa_modexpo {
 981         compat_uptr_t   inputdata;
 982         unsigned int    inputdatalength;
 983         compat_uptr_t   outputdata;
 984         unsigned int    outputdatalength;
 985         compat_uptr_t   b_key;
 986         compat_uptr_t   n_modulus;
 987 };
 988
 989 static long trans_modexpo32(struct file *filp, unsigned int cmd,
 990                             unsigned long arg)
 991 {
 992         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
 993         struct compat_ica_rsa_modexpo mex32;
 994         struct ica_rsa_modexpo mex64;
 995         long rc;
 996
 997         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
 998                 return -EFAULT;
 999         mex64.inputdata = compat_ptr(mex32.inputdata);
1000         mex64.inputdatalength = mex32.inputdatalength;
1001         mex64.outputdata = compat_ptr(mex32.outputdata);
1002         mex64.outputdatalength = mex32.outputdatalength;
1003         mex64.b_key = compat_ptr(mex32.b_key);
1004         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1005         do {
1006                 rc = zcrypt_rsa_modexpo(&mex64);
1007         } while (rc == -EAGAIN);
1008         /* on failure: retry once again after a requested rescan */
1009         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1010                 do {
1011                         rc = zcrypt_rsa_modexpo(&mex64);
1012                 } while (rc == -EAGAIN);
1013         if (rc)
1014                 return rc;
1015         return put_user(mex64.outputdatalength,
1016                         &umex32->outputdatalength);
1017 }
1018
1019 struct compat_ica_rsa_modexpo_crt {
1020         compat_uptr_t   inputdata;
1021         unsigned int    inputdatalength;
1022         compat_uptr_t   outputdata;
1023         unsigned int    outputdatalength;
1024         compat_uptr_t   bp_key;
1025         compat_uptr_t   bq_key;
1026         compat_uptr_t   np_prime;
1027         compat_uptr_t   nq_prime;
1028         compat_uptr_t   u_mult_inv;
1029 };
1030
1031 static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
1032                                 unsigned long arg)
1033 {
1034         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1035         struct compat_ica_rsa_modexpo_crt crt32;
1036         struct ica_rsa_modexpo_crt crt64;
1037         long rc;
1038
1039         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1040                 return -EFAULT;
1041         crt64.inputdata = compat_ptr(crt32.inputdata);
1042         crt64.inputdatalength = crt32.inputdatalength;
1043         crt64.outputdata=  compat_ptr(crt32.outputdata);
1044         crt64.outputdatalength = crt32.outputdatalength;
1045         crt64.bp_key = compat_ptr(crt32.bp_key);
1046         crt64.bq_key = compat_ptr(crt32.bq_key);
1047         crt64.np_prime = compat_ptr(crt32.np_prime);
1048         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1049         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1050         do {
1051                 rc = zcrypt_rsa_crt(&crt64);
1052         } while (rc == -EAGAIN);
1053         /* on failure: retry once again after a requested rescan */
1054         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1055                 do {
1056                         rc = zcrypt_rsa_crt(&crt64);
1057                 } while (rc == -EAGAIN);
1058         if (rc)
1059                 return rc;
1060         return put_user(crt64.outputdatalength,
1061                         &ucrt32->outputdatalength);
1062 }
1063
1064 struct compat_ica_xcRB {
1065         unsigned short  agent_ID;
1066         unsigned int    user_defined;
1067         unsigned short  request_ID;
1068         unsigned int    request_control_blk_length;
1069         unsigned char   padding1[16 - sizeof (compat_uptr_t)];
1070         compat_uptr_t   request_control_blk_addr;
1071         unsigned int    request_data_length;
1072         char            padding2[16 - sizeof (compat_uptr_t)];
1073         compat_uptr_t   request_data_address;
1074         unsigned int    reply_control_blk_length;
1075         char            padding3[16 - sizeof (compat_uptr_t)];
1076         compat_uptr_t   reply_control_blk_addr;
1077         unsigned int    reply_data_length;
1078         char            padding4[16 - sizeof (compat_uptr_t)];
1079         compat_uptr_t   reply_data_addr;
1080         unsigned short  priority_window;
1081         unsigned int    status;
1082 } __attribute__((packed));
1083
1084 static long trans_xcRB32(struct file *filp, unsigned int cmd,
1085                          unsigned long arg)
1086 {
1087         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1088         struct compat_ica_xcRB xcRB32;
1089         struct ica_xcRB xcRB64;
1090         long rc;
1091
1092         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1093                 return -EFAULT;
1094         xcRB64.agent_ID = xcRB32.agent_ID;
1095         xcRB64.user_defined = xcRB32.user_defined;
1096         xcRB64.request_ID = xcRB32.request_ID;
1097         xcRB64.request_control_blk_length =
1098                 xcRB32.request_control_blk_length;
1099         xcRB64.request_control_blk_addr =
1100                 compat_ptr(xcRB32.request_control_blk_addr);
1101         xcRB64.request_data_length =
1102                 xcRB32.request_data_length;
1103         xcRB64.request_data_address =
1104                 compat_ptr(xcRB32.request_data_address);
1105         xcRB64.reply_control_blk_length =
1106                 xcRB32.reply_control_blk_length;
1107         xcRB64.reply_control_blk_addr =
1108                 compat_ptr(xcRB32.reply_control_blk_addr);
1109         xcRB64.reply_data_length = xcRB32.reply_data_length;
1110         xcRB64.reply_data_addr =
1111                 compat_ptr(xcRB32.reply_data_addr);
1112         xcRB64.priority_window = xcRB32.priority_window;
1113         xcRB64.status = xcRB32.status;
1114         do {
1115                 rc = zcrypt_send_cprb(&xcRB64);
1116         } while (rc == -EAGAIN);
1117         /* on failure: retry once again after a requested rescan */
1118         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1119                 do {
1120                         rc = zcrypt_send_cprb(&xcRB64);
1121                 } while (rc == -EAGAIN);
1122         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1123         xcRB32.reply_data_length = xcRB64.reply_data_length;
1124         xcRB32.status = xcRB64.status;
1125         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1126                         return -EFAULT;
1127         return rc;
1128 }
1129
1130 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1131                          unsigned long arg)
1132 {
1133         if (cmd == ICARSAMODEXPO)
1134                 return trans_modexpo32(filp, cmd, arg);
1135         if (cmd == ICARSACRT)
1136                 return trans_modexpo_crt32(filp, cmd, arg);
1137         if (cmd == ZSECSENDCPRB)
1138                 return trans_xcRB32(filp, cmd, arg);
1139         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1140 }
1141 #endif
1142
1143 /*
1144  * Misc device file operations.
1145  */
1146 static const struct file_operations zcrypt_fops = {
1147         .owner          = THIS_MODULE,
1148         .read           = zcrypt_read,
1149         .write          = zcrypt_write,
1150         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1151 #ifdef CONFIG_COMPAT
1152         .compat_ioctl   = zcrypt_compat_ioctl,
1153 #endif
1154         .open           = zcrypt_open,
1155         .release        = zcrypt_release,
1156         .llseek         = no_llseek,
1157 };
1158
1159 /*
1160  * Misc device.
1161  */
1162 static struct miscdevice zcrypt_misc_device = {
1163         .minor      = MISC_DYNAMIC_MINOR,
1164         .name       = "z90crypt",
1165         .fops       = &zcrypt_fops,
1166 };
1167
1168 /*
1169  * Deprecated /proc entry support.
1170  */
1171 static struct proc_dir_entry *zcrypt_entry;
1172
1173 static void sprintcl(struct seq_file *m, unsigned char *addr, unsigned int len)
1174 {
1175         int i;
1176
1177         for (i = 0; i < len; i++)
1178                 seq_printf(m, "%01x", (unsigned int) addr[i]);
1179         seq_putc(m, ' ');
1180 }
1181
1182 static void sprintrw(struct seq_file *m, unsigned char *addr, unsigned int len)
1183 {
1184         int inl, c, cx;
1185
1186         seq_printf(m, "    ");
1187         inl = 0;
1188         for (c = 0; c < (len / 16); c++) {
1189                 sprintcl(m, addr+inl, 16);
1190                 inl += 16;
1191         }
1192         cx = len%16;
1193         if (cx) {
1194                 sprintcl(m, addr+inl, cx);
1195                 inl += cx;
1196         }
1197         seq_putc(m, '\n');
1198 }
1199
1200 static void sprinthx(unsigned char *title, struct seq_file *m,
1201                      unsigned char *addr, unsigned int len)
1202 {
1203         int inl, r, rx;
1204
1205         seq_printf(m, "\n%s\n", title);
1206         inl = 0;
1207         for (r = 0; r < (len / 64); r++) {
1208                 sprintrw(m, addr+inl, 64);
1209                 inl += 64;
1210         }
1211         rx = len % 64;
1212         if (rx) {
1213                 sprintrw(m, addr+inl, rx);
1214                 inl += rx;
1215         }
1216         seq_putc(m, '\n');
1217 }
1218
1219 static void sprinthx4(unsigned char *title, struct seq_file *m,
1220                       unsigned int *array, unsigned int len)
1221 {
1222         seq_printf(m, "\n%s\n", title);
1223         seq_hex_dump(m, "    ", DUMP_PREFIX_NONE, 32, 4, array, len, false);
1224         seq_putc(m, '\n');
1225 }
1226
1227 static int zcrypt_proc_show(struct seq_file *m, void *v)
1228 {
1229         char workarea[sizeof(int) * AP_DEVICES];
1230
1231         seq_printf(m, "\nzcrypt version: %d.%d.%d\n",
1232                    ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT);
1233         seq_printf(m, "Cryptographic domain: %d\n", ap_domain_index);
1234         seq_printf(m, "Total device count: %d\n", zcrypt_device_count);
1235         seq_printf(m, "PCICA count: %d\n", zcrypt_count_type(ZCRYPT_PCICA));
1236         seq_printf(m, "PCICC count: %d\n", zcrypt_count_type(ZCRYPT_PCICC));
1237         seq_printf(m, "PCIXCC MCL2 count: %d\n",
1238                    zcrypt_count_type(ZCRYPT_PCIXCC_MCL2));
1239         seq_printf(m, "PCIXCC MCL3 count: %d\n",
1240                    zcrypt_count_type(ZCRYPT_PCIXCC_MCL3));
1241         seq_printf(m, "CEX2C count: %d\n", zcrypt_count_type(ZCRYPT_CEX2C));
1242         seq_printf(m, "CEX2A count: %d\n", zcrypt_count_type(ZCRYPT_CEX2A));
1243         seq_printf(m, "CEX3C count: %d\n", zcrypt_count_type(ZCRYPT_CEX3C));
1244         seq_printf(m, "CEX3A count: %d\n", zcrypt_count_type(ZCRYPT_CEX3A));
1245         seq_printf(m, "requestq count: %d\n", zcrypt_requestq_count());
1246         seq_printf(m, "pendingq count: %d\n", zcrypt_pendingq_count());
1247         seq_printf(m, "Total open handles: %d\n\n",
1248                    atomic_read(&zcrypt_open_count));
1249         zcrypt_status_mask(workarea);
1250         sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) "
1251                  "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A",
1252                  m, workarea, AP_DEVICES);
1253         zcrypt_qdepth_mask(workarea);
1254         sprinthx("Waiting work element counts", m, workarea, AP_DEVICES);
1255         zcrypt_perdev_reqcnt((int *) workarea);
1256         sprinthx4("Per-device successfully completed request counts",
1257                   m, (unsigned int *) workarea, AP_DEVICES);
1258         return 0;
1259 }
1260
1261 static int zcrypt_proc_open(struct inode *inode, struct file *file)
1262 {
1263         return single_open(file, zcrypt_proc_show, NULL);
1264 }
1265
1266 static void zcrypt_disable_card(int index)
1267 {
1268         struct zcrypt_card *zc;
1269         struct zcrypt_queue *zq;
1270
1271         spin_lock(&zcrypt_list_lock);
1272         for_each_zcrypt_card(zc) {
1273                 for_each_zcrypt_queue(zq, zc) {
1274                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1275                                 continue;
1276                         zq->online = 0;
1277                         ap_flush_queue(zq->queue);
1278                 }
1279         }
1280         spin_unlock(&zcrypt_list_lock);
1281 }
1282
1283 static void zcrypt_enable_card(int index)
1284 {
1285         struct zcrypt_card *zc;
1286         struct zcrypt_queue *zq;
1287
1288         spin_lock(&zcrypt_list_lock);
1289         for_each_zcrypt_card(zc) {
1290                 for_each_zcrypt_queue(zq, zc) {
1291                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1292                                 continue;
1293                         zq->online = 1;
1294                         ap_flush_queue(zq->queue);
1295                 }
1296         }
1297         spin_unlock(&zcrypt_list_lock);
1298 }
1299
1300 static ssize_t zcrypt_proc_write(struct file *file, const char __user *buffer,
1301                                  size_t count, loff_t *pos)
1302 {
1303         unsigned char *lbuf, *ptr;
1304         size_t local_count;
1305         int j;
1306
1307         if (count <= 0)
1308                 return 0;
1309
1310 #define LBUFSIZE 1200UL
1311         lbuf = kmalloc(LBUFSIZE, GFP_KERNEL);
1312         if (!lbuf)
1313                 return 0;
1314
1315         local_count = min(LBUFSIZE - 1, count);
1316         if (copy_from_user(lbuf, buffer, local_count) != 0) {
1317                 kfree(lbuf);
1318                 return -EFAULT;
1319         }
1320         lbuf[local_count] = '\0';
1321
1322         ptr = strstr(lbuf, "Online devices");
1323         if (!ptr)
1324                 goto out;
1325         ptr = strstr(ptr, "\n");
1326         if (!ptr)
1327                 goto out;
1328         ptr++;
1329
1330         if (strstr(ptr, "Waiting work element counts") == NULL)
1331                 goto out;
1332
1333         for (j = 0; j < 64 && *ptr; ptr++) {
1334                 /*
1335                  * '0' for no device, '1' for PCICA, '2' for PCICC,
1336                  * '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3,
1337                  * '5' for CEX2C and '6' for CEX2A'
1338                  * '7' for CEX3C and '8' for CEX3A
1339                  */
1340                 if (*ptr >= '0' && *ptr <= '8')
1341                         j++;
1342                 else if (*ptr == 'd' || *ptr == 'D')
1343                         zcrypt_disable_card(j++);
1344                 else if (*ptr == 'e' || *ptr == 'E')
1345                         zcrypt_enable_card(j++);
1346                 else if (*ptr != ' ' && *ptr != '\t')
1347                         break;
1348         }
1349 out:
1350         kfree(lbuf);
1351         return count;
1352 }
1353
1354 static const struct file_operations zcrypt_proc_fops = {
1355         .owner          = THIS_MODULE,
1356         .open           = zcrypt_proc_open,
1357         .read           = seq_read,
1358         .llseek         = seq_lseek,
1359         .release        = single_release,
1360         .write          = zcrypt_proc_write,
1361 };
1362
1363 static int zcrypt_rng_device_count;
1364 static u32 *zcrypt_rng_buffer;
1365 static int zcrypt_rng_buffer_index;
1366 static DEFINE_MUTEX(zcrypt_rng_mutex);
1367
1368 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1369 {
1370         int rc;
1371
1372         /*
1373          * We don't need locking here because the RNG API guarantees serialized
1374          * read method calls.
1375          */
1376         if (zcrypt_rng_buffer_index == 0) {
1377                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1378                 /* on failure: retry once again after a requested rescan */
1379                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1380                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1381                 if (rc < 0)
1382                         return -EIO;
1383                 zcrypt_rng_buffer_index = rc / sizeof *data;
1384         }
1385         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1386         return sizeof *data;
1387 }
1388
1389 static struct hwrng zcrypt_rng_dev = {
1390         .name           = "zcrypt",
1391         .data_read      = zcrypt_rng_data_read,
1392         .quality        = 990,
1393 };
1394
1395 int zcrypt_rng_device_add(void)
1396 {
1397         int rc = 0;
1398
1399         mutex_lock(&zcrypt_rng_mutex);
1400         if (zcrypt_rng_device_count == 0) {
1401                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1402                 if (!zcrypt_rng_buffer) {
1403                         rc = -ENOMEM;
1404                         goto out;
1405                 }
1406                 zcrypt_rng_buffer_index = 0;
1407                 if (!zcrypt_hwrng_seed)
1408                         zcrypt_rng_dev.quality = 0;
1409                 rc = hwrng_register(&zcrypt_rng_dev);
1410                 if (rc)
1411                         goto out_free;
1412                 zcrypt_rng_device_count = 1;
1413         } else
1414                 zcrypt_rng_device_count++;
1415         mutex_unlock(&zcrypt_rng_mutex);
1416         return 0;
1417
1418 out_free:
1419         free_page((unsigned long) zcrypt_rng_buffer);
1420 out:
1421         mutex_unlock(&zcrypt_rng_mutex);
1422         return rc;
1423 }
1424
1425 void zcrypt_rng_device_remove(void)
1426 {
1427         mutex_lock(&zcrypt_rng_mutex);
1428         zcrypt_rng_device_count--;
1429         if (zcrypt_rng_device_count == 0) {
1430                 hwrng_unregister(&zcrypt_rng_dev);
1431                 free_page((unsigned long) zcrypt_rng_buffer);
1432         }
1433         mutex_unlock(&zcrypt_rng_mutex);
1434 }
1435
1436 int __init zcrypt_debug_init(void)
1437 {
1438         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1439                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
1440         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1441         debug_set_level(zcrypt_dbf_info, DBF_ERR);
1442
1443         return 0;
1444 }
1445
1446 void zcrypt_debug_exit(void)
1447 {
1448         debug_unregister(zcrypt_dbf_info);
1449 }
1450
1451 /**
1452  * zcrypt_api_init(): Module initialization.
1453  *
1454  * The module initialization code.
1455  */
1456 int __init zcrypt_api_init(void)
1457 {
1458         int rc;
1459
1460         rc = zcrypt_debug_init();
1461         if (rc)
1462                 goto out;
1463
1464         atomic_set(&zcrypt_rescan_req, 0);
1465
1466         /* Register the request sprayer. */
1467         rc = misc_register(&zcrypt_misc_device);
1468         if (rc < 0)
1469                 goto out;
1470
1471         /* Set up the proc file system */
1472         zcrypt_entry = proc_create("driver/z90crypt", 0644, NULL,
1473                                    &zcrypt_proc_fops);
1474         if (!zcrypt_entry) {
1475                 rc = -ENOMEM;
1476                 goto out_misc;
1477         }
1478
1479         zcrypt_msgtype6_init();
1480         zcrypt_msgtype50_init();
1481         return 0;
1482
1483 out_misc:
1484         misc_deregister(&zcrypt_misc_device);
1485 out:
1486         return rc;
1487 }
1488
1489 /**
1490  * zcrypt_api_exit(): Module termination.
1491  *
1492  * The module termination code.
1493  */
1494 void __exit zcrypt_api_exit(void)
1495 {
1496         remove_proc_entry("driver/z90crypt", NULL);
1497         misc_deregister(&zcrypt_misc_device);
1498         zcrypt_msgtype6_exit();
1499         zcrypt_msgtype50_exit();
1500         zcrypt_debug_exit();
1501 }
1502
1503 module_init(zcrypt_api_init);
1504 module_exit(zcrypt_api_exit);