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                 func_code = 0;
 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                 func_code = 0;
 316                 rc = -EINVAL;
 317                 goto out;
 318         }
 319
 320         /*
 321          * As long as outputdatalength is big enough, we can set the
 322          * outputdatalength equal to the inputdatalength, since that is the
 323          * number of bytes we will copy in any case
 324          */
 325         crt->outputdatalength = crt->inputdatalength;
 326
 327         rc = get_rsa_crt_fc(crt, &func_code);
 328         if (rc)
 329                 goto out;
 330
 331         pref_zc = NULL;
 332         pref_zq = NULL;
 333         spin_lock(&zcrypt_list_lock);
 334         for_each_zcrypt_card(zc) {
 335                 /* Check for online accelarator and CCA cards */
 336                 if (!zc->online || !(zc->card->functions & 0x18000000))
 337                         continue;
 338                 /* Check for size limits */
 339                 if (zc->min_mod_size > crt->inputdatalength ||
 340                     zc->max_mod_size < crt->inputdatalength)
 341                         continue;
 342                 /* get weight index of the card device  */
 343                 weight = zc->speed_rating[func_code];
 344                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 345                         continue;
 346                 for_each_zcrypt_queue(zq, zc) {
 347                         /* check if device is online and eligible */
 348                         if (!zq->online || !zq->ops->rsa_modexpo_crt)
 349                                 continue;
 350                         if (zcrypt_queue_compare(zq, pref_zq,
 351                                                  weight, pref_weight))
 352                                 continue;
 353                         pref_zc = zc;
 354                         pref_zq = zq;
 355                         pref_weight = weight;
 356                 }
 357         }
 358         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
 359         spin_unlock(&zcrypt_list_lock);
 360
 361         if (!pref_zq) {
 362                 rc = -ENODEV;
 363                 goto out;
 364         }
 365
 366         qid = pref_zq->queue->qid;
 367         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
 368
 369         spin_lock(&zcrypt_list_lock);
 370         zcrypt_drop_queue(pref_zc, pref_zq, weight);
 371         spin_unlock(&zcrypt_list_lock);
 372
 373 out:
 374         trace_s390_zcrypt_rep(crt, func_code, rc,
 375                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 376         return rc;
 377 }
 378
 379 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
 380 {
 381         struct zcrypt_card *zc, *pref_zc;
 382         struct zcrypt_queue *zq, *pref_zq;
 383         struct ap_message ap_msg;
 384         unsigned int weight, pref_weight;
 385         unsigned int func_code;
 386         unsigned short *domain;
 387         int qid = 0, rc = -ENODEV;
 388
 389         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
 390
 391         rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
 392         if (rc)
 393                 goto out;
 394
 395         pref_zc = NULL;
 396         pref_zq = NULL;
 397         spin_lock(&zcrypt_list_lock);
 398         for_each_zcrypt_card(zc) {
 399                 /* Check for online CCA cards */
 400                 if (!zc->online || !(zc->card->functions & 0x10000000))
 401                         continue;
 402                 /* Check for user selected CCA card */
 403                 if (xcRB->user_defined != AUTOSELECT &&
 404                     xcRB->user_defined != zc->card->id)
 405                         continue;
 406                 /* get weight index of the card device  */
 407                 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
 408                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 409                         continue;
 410                 for_each_zcrypt_queue(zq, zc) {
 411                         /* check if device is online and eligible */
 412                         if (!zq->online ||
 413                             !zq->ops->send_cprb ||
 414                             ((*domain != (unsigned short) AUTOSELECT) &&
 415                              (*domain != AP_QID_QUEUE(zq->queue->qid))))
 416                                 continue;
 417                         if (zcrypt_queue_compare(zq, pref_zq,
 418                                                  weight, pref_weight))
 419                                 continue;
 420                         pref_zc = zc;
 421                         pref_zq = zq;
 422                         pref_weight = weight;
 423                 }
 424         }
 425         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
 426         spin_unlock(&zcrypt_list_lock);
 427
 428         if (!pref_zq) {
 429                 rc = -ENODEV;
 430                 goto out;
 431         }
 432
 433         /* in case of auto select, provide the correct domain */
 434         qid = pref_zq->queue->qid;
 435         if (*domain == (unsigned short) AUTOSELECT)
 436                 *domain = AP_QID_QUEUE(qid);
 437
 438         rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
 439
 440         spin_lock(&zcrypt_list_lock);
 441         zcrypt_drop_queue(pref_zc, pref_zq, weight);
 442         spin_unlock(&zcrypt_list_lock);
 443
 444 out:
 445         trace_s390_zcrypt_rep(xcRB, func_code, rc,
 446                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 447         return rc;
 448 }
 449 EXPORT_SYMBOL(zcrypt_send_cprb);
 450
 451 static bool is_desired_ep11_card(unsigned int dev_id,
 452                                  unsigned short target_num,
 453                                  struct ep11_target_dev *targets)
 454 {
 455         while (target_num-- > 0) {
 456                 if (dev_id == targets->ap_id)
 457                         return true;
 458                 targets++;
 459         }
 460         return false;
 461 }
 462
 463 static bool is_desired_ep11_queue(unsigned int dev_qid,
 464                                   unsigned short target_num,
 465                                   struct ep11_target_dev *targets)
 466 {
 467         while (target_num-- > 0) {
 468                 if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
 469                         return true;
 470                 targets++;
 471         }
 472         return false;
 473 }
 474
 475 static long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
 476 {
 477         struct zcrypt_card *zc, *pref_zc;
 478         struct zcrypt_queue *zq, *pref_zq;
 479         struct ep11_target_dev *targets;
 480         unsigned short target_num;
 481         unsigned int weight, pref_weight;
 482         unsigned int func_code;
 483         struct ap_message ap_msg;
 484         int qid = 0, rc = -ENODEV;
 485
 486         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
 487
 488         target_num = (unsigned short) xcrb->targets_num;
 489
 490         /* empty list indicates autoselect (all available targets) */
 491         targets = NULL;
 492         if (target_num != 0) {
 493                 struct ep11_target_dev __user *uptr;
 494
 495                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
 496                 if (!targets) {
 497                         func_code = 0;
 498                         rc = -ENOMEM;
 499                         goto out;
 500                 }
 501
 502                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
 503                 if (copy_from_user(targets, uptr,
 504                                    target_num * sizeof(*targets))) {
 505                         func_code = 0;
 506                         rc = -EFAULT;
 507                         goto out;
 508                 }
 509         }
 510
 511         rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
 512         if (rc)
 513                 goto out_free;
 514
 515         pref_zc = NULL;
 516         pref_zq = NULL;
 517         spin_lock(&zcrypt_list_lock);
 518         for_each_zcrypt_card(zc) {
 519                 /* Check for online EP11 cards */
 520                 if (!zc->online || !(zc->card->functions & 0x04000000))
 521                         continue;
 522                 /* Check for user selected EP11 card */
 523                 if (targets &&
 524                     !is_desired_ep11_card(zc->card->id, target_num, targets))
 525                         continue;
 526                 /* get weight index of the card device  */
 527                 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
 528                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 529                         continue;
 530                 for_each_zcrypt_queue(zq, zc) {
 531                         /* check if device is online and eligible */
 532                         if (!zq->online ||
 533                             !zq->ops->send_ep11_cprb ||
 534                             (targets &&
 535                              !is_desired_ep11_queue(zq->queue->qid,
 536                                                     target_num, targets)))
 537                                 continue;
 538                         if (zcrypt_queue_compare(zq, pref_zq,
 539                                                  weight, pref_weight))
 540                                 continue;
 541                         pref_zc = zc;
 542                         pref_zq = zq;
 543                         pref_weight = weight;
 544                 }
 545         }
 546         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
 547         spin_unlock(&zcrypt_list_lock);
 548
 549         if (!pref_zq) {
 550                 rc = -ENODEV;
 551                 goto out_free;
 552         }
 553
 554         qid = pref_zq->queue->qid;
 555         rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
 556
 557         spin_lock(&zcrypt_list_lock);
 558         zcrypt_drop_queue(pref_zc, pref_zq, weight);
 559         spin_unlock(&zcrypt_list_lock);
 560
 561 out_free:
 562         kfree(targets);
 563 out:
 564         trace_s390_zcrypt_rep(xcrb, func_code, rc,
 565                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 566         return rc;
 567 }
 568
 569 static long zcrypt_rng(char *buffer)
 570 {
 571         struct zcrypt_card *zc, *pref_zc;
 572         struct zcrypt_queue *zq, *pref_zq;
 573         unsigned int weight, pref_weight;
 574         unsigned int func_code;
 575         struct ap_message ap_msg;
 576         unsigned int domain;
 577         int qid = 0, rc = -ENODEV;
 578
 579         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
 580
 581         rc = get_rng_fc(&ap_msg, &func_code, &domain);
 582         if (rc)
 583                 goto out;
 584
 585         pref_zc = NULL;
 586         pref_zq = NULL;
 587         spin_lock(&zcrypt_list_lock);
 588         for_each_zcrypt_card(zc) {
 589                 /* Check for online CCA cards */
 590                 if (!zc->online || !(zc->card->functions & 0x10000000))
 591                         continue;
 592                 /* get weight index of the card device  */
 593                 weight = zc->speed_rating[func_code];
 594                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
 595                         continue;
 596                 for_each_zcrypt_queue(zq, zc) {
 597                         /* check if device is online and eligible */
 598                         if (!zq->online || !zq->ops->rng)
 599                                 continue;
 600                         if (zcrypt_queue_compare(zq, pref_zq,
 601                                                  weight, pref_weight))
 602                                 continue;
 603                         pref_zc = zc;
 604                         pref_zq = zq;
 605                         pref_weight = weight;
 606                 }
 607         }
 608         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
 609         spin_unlock(&zcrypt_list_lock);
 610
 611         if (!pref_zq)
 612                 return -ENODEV;
 613
 614         qid = pref_zq->queue->qid;
 615         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
 616
 617         spin_lock(&zcrypt_list_lock);
 618         zcrypt_drop_queue(pref_zc, pref_zq, weight);
 619         spin_unlock(&zcrypt_list_lock);
 620
 621 out:
 622         trace_s390_zcrypt_rep(buffer, func_code, rc,
 623                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
 624         return rc;
 625 }
 626
 627 void zcrypt_device_status_mask(struct zcrypt_device_matrix *matrix)
 628 {
 629         struct zcrypt_card *zc;
 630         struct zcrypt_queue *zq;
 631         struct zcrypt_device_status *stat;
 632
 633         memset(matrix, 0, sizeof(*matrix));
 634         spin_lock(&zcrypt_list_lock);
 635         for_each_zcrypt_card(zc) {
 636                 for_each_zcrypt_queue(zq, zc) {
 637                         stat = matrix->device;
 638                         stat += AP_QID_CARD(zq->queue->qid) * MAX_ZDEV_DOMAINS;
 639                         stat += AP_QID_QUEUE(zq->queue->qid);
 640                         stat->hwtype = zc->card->ap_dev.device_type;
 641                         stat->functions = zc->card->functions >> 26;
 642                         stat->qid = zq->queue->qid;
 643                         stat->online = zq->online ? 0x01 : 0x00;
 644                 }
 645         }
 646         spin_unlock(&zcrypt_list_lock);
 647 }
 648 EXPORT_SYMBOL(zcrypt_device_status_mask);
 649
 650 static void zcrypt_status_mask(char status[AP_DEVICES])
 651 {
 652         struct zcrypt_card *zc;
 653         struct zcrypt_queue *zq;
 654
 655         memset(status, 0, sizeof(char) * AP_DEVICES);
 656         spin_lock(&zcrypt_list_lock);
 657         for_each_zcrypt_card(zc) {
 658                 for_each_zcrypt_queue(zq, zc) {
 659                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 660                                 continue;
 661                         status[AP_QID_CARD(zq->queue->qid)] =
 662                                 zc->online ? zc->user_space_type : 0x0d;
 663                 }
 664         }
 665         spin_unlock(&zcrypt_list_lock);
 666 }
 667
 668 static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES])
 669 {
 670         struct zcrypt_card *zc;
 671         struct zcrypt_queue *zq;
 672
 673         memset(qdepth, 0, sizeof(char)  * AP_DEVICES);
 674         spin_lock(&zcrypt_list_lock);
 675         local_bh_disable();
 676         for_each_zcrypt_card(zc) {
 677                 for_each_zcrypt_queue(zq, zc) {
 678                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 679                                 continue;
 680                         spin_lock(&zq->queue->lock);
 681                         qdepth[AP_QID_CARD(zq->queue->qid)] =
 682                                 zq->queue->pendingq_count +
 683                                 zq->queue->requestq_count;
 684                         spin_unlock(&zq->queue->lock);
 685                 }
 686         }
 687         local_bh_enable();
 688         spin_unlock(&zcrypt_list_lock);
 689 }
 690
 691 static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES])
 692 {
 693         struct zcrypt_card *zc;
 694         struct zcrypt_queue *zq;
 695
 696         memset(reqcnt, 0, sizeof(int) * AP_DEVICES);
 697         spin_lock(&zcrypt_list_lock);
 698         local_bh_disable();
 699         for_each_zcrypt_card(zc) {
 700                 for_each_zcrypt_queue(zq, zc) {
 701                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 702                                 continue;
 703                         spin_lock(&zq->queue->lock);
 704                         reqcnt[AP_QID_CARD(zq->queue->qid)] =
 705                                 zq->queue->total_request_count;
 706                         spin_unlock(&zq->queue->lock);
 707                 }
 708         }
 709         local_bh_enable();
 710         spin_unlock(&zcrypt_list_lock);
 711 }
 712
 713 static int zcrypt_pendingq_count(void)
 714 {
 715         struct zcrypt_card *zc;
 716         struct zcrypt_queue *zq;
 717         int pendingq_count;
 718
 719         pendingq_count = 0;
 720         spin_lock(&zcrypt_list_lock);
 721         local_bh_disable();
 722         for_each_zcrypt_card(zc) {
 723                 for_each_zcrypt_queue(zq, zc) {
 724                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 725                                 continue;
 726                         spin_lock(&zq->queue->lock);
 727                         pendingq_count += zq->queue->pendingq_count;
 728                         spin_unlock(&zq->queue->lock);
 729                 }
 730         }
 731         local_bh_enable();
 732         spin_unlock(&zcrypt_list_lock);
 733         return pendingq_count;
 734 }
 735
 736 static int zcrypt_requestq_count(void)
 737 {
 738         struct zcrypt_card *zc;
 739         struct zcrypt_queue *zq;
 740         int requestq_count;
 741
 742         requestq_count = 0;
 743         spin_lock(&zcrypt_list_lock);
 744         local_bh_disable();
 745         for_each_zcrypt_card(zc) {
 746                 for_each_zcrypt_queue(zq, zc) {
 747                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 748                                 continue;
 749                         spin_lock(&zq->queue->lock);
 750                         requestq_count += zq->queue->requestq_count;
 751                         spin_unlock(&zq->queue->lock);
 752                 }
 753         }
 754         local_bh_enable();
 755         spin_unlock(&zcrypt_list_lock);
 756         return requestq_count;
 757 }
 758
 759 static int zcrypt_count_type(int type)
 760 {
 761         struct zcrypt_card *zc;
 762         struct zcrypt_queue *zq;
 763         int device_count;
 764
 765         device_count = 0;
 766         spin_lock(&zcrypt_list_lock);
 767         for_each_zcrypt_card(zc) {
 768                 if (zc->card->id != type)
 769                         continue;
 770                 for_each_zcrypt_queue(zq, zc) {
 771                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
 772                                 continue;
 773                         device_count++;
 774                 }
 775         }
 776         spin_unlock(&zcrypt_list_lock);
 777         return device_count;
 778 }
 779
 780 /**
 781  * zcrypt_ica_status(): Old, depracted combi status call.
 782  *
 783  * Old, deprecated combi status call.
 784  */
 785 static long zcrypt_ica_status(struct file *filp, unsigned long arg)
 786 {
 787         struct ica_z90_status *pstat;
 788         int ret;
 789
 790         pstat = kzalloc(sizeof(*pstat), GFP_KERNEL);
 791         if (!pstat)
 792                 return -ENOMEM;
 793         pstat->totalcount = zcrypt_device_count;
 794         pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA);
 795         pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC);
 796         pstat->requestqWaitCount = zcrypt_requestq_count();
 797         pstat->pendingqWaitCount = zcrypt_pendingq_count();
 798         pstat->totalOpenCount = atomic_read(&zcrypt_open_count);
 799         pstat->cryptoDomain = ap_domain_index;
 800         zcrypt_status_mask(pstat->status);
 801         zcrypt_qdepth_mask(pstat->qdepth);
 802         ret = 0;
 803         if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat)))
 804                 ret = -EFAULT;
 805         kfree(pstat);
 806         return ret;
 807 }
 808
 809 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
 810                                   unsigned long arg)
 811 {
 812         int rc;
 813
 814         switch (cmd) {
 815         case ICARSAMODEXPO: {
 816                 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
 817                 struct ica_rsa_modexpo mex;
 818                 if (copy_from_user(&mex, umex, sizeof(mex)))
 819                         return -EFAULT;
 820                 do {
 821                         rc = zcrypt_rsa_modexpo(&mex);
 822                 } while (rc == -EAGAIN);
 823                 /* on failure: retry once again after a requested rescan */
 824                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
 825                         do {
 826                                 rc = zcrypt_rsa_modexpo(&mex);
 827                         } while (rc == -EAGAIN);
 828                 if (rc) {
 829                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
 830                         return rc;
 831                 }
 832                 return put_user(mex.outputdatalength, &umex->outputdatalength);
 833         }
 834         case ICARSACRT: {
 835                 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
 836                 struct ica_rsa_modexpo_crt crt;
 837                 if (copy_from_user(&crt, ucrt, sizeof(crt)))
 838                         return -EFAULT;
 839                 do {
 840                         rc = zcrypt_rsa_crt(&crt);
 841                 } while (rc == -EAGAIN);
 842                 /* on failure: retry once again after a requested rescan */
 843                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
 844                         do {
 845                                 rc = zcrypt_rsa_crt(&crt);
 846                         } while (rc == -EAGAIN);
 847                 if (rc) {
 848                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
 849                         return rc;
 850                 }
 851                 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
 852         }
 853         case ZSECSENDCPRB: {
 854                 struct ica_xcRB __user *uxcRB = (void __user *) arg;
 855                 struct ica_xcRB xcRB;
 856                 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
 857                         return -EFAULT;
 858                 do {
 859                         rc = zcrypt_send_cprb(&xcRB);
 860                 } while (rc == -EAGAIN);
 861                 /* on failure: retry once again after a requested rescan */
 862                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
 863                         do {
 864                                 rc = zcrypt_send_cprb(&xcRB);
 865                         } while (rc == -EAGAIN);
 866                 if (rc)
 867                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d\n", rc);
 868                 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
 869                         return -EFAULT;
 870                 return rc;
 871         }
 872         case ZSENDEP11CPRB: {
 873                 struct ep11_urb __user *uxcrb = (void __user *)arg;
 874                 struct ep11_urb xcrb;
 875                 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
 876                         return -EFAULT;
 877                 do {
 878                         rc = zcrypt_send_ep11_cprb(&xcrb);
 879                 } while (rc == -EAGAIN);
 880                 /* on failure: retry once again after a requested rescan */
 881                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
 882                         do {
 883                                 rc = zcrypt_send_ep11_cprb(&xcrb);
 884                         } while (rc == -EAGAIN);
 885                 if (rc)
 886                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
 887                 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
 888                         return -EFAULT;
 889                 return rc;
 890         }
 891         case ZDEVICESTATUS: {
 892                 struct zcrypt_device_matrix *device_status;
 893
 894                 device_status = kzalloc(sizeof(struct zcrypt_device_matrix),
 895                                         GFP_KERNEL);
 896                 if (!device_status)
 897                         return -ENOMEM;
 898
 899                 zcrypt_device_status_mask(device_status);
 900
 901                 if (copy_to_user((char __user *) arg, device_status,
 902                                  sizeof(struct zcrypt_device_matrix))) {
 903                         kfree(device_status);
 904                         return -EFAULT;
 905                 }
 906
 907                 kfree(device_status);
 908                 return 0;
 909         }
 910         case Z90STAT_STATUS_MASK: {
 911                 char status[AP_DEVICES];
 912                 zcrypt_status_mask(status);
 913                 if (copy_to_user((char __user *) arg, status,
 914                                  sizeof(char) * AP_DEVICES))
 915                         return -EFAULT;
 916                 return 0;
 917         }
 918         case Z90STAT_QDEPTH_MASK: {
 919                 char qdepth[AP_DEVICES];
 920                 zcrypt_qdepth_mask(qdepth);
 921                 if (copy_to_user((char __user *) arg, qdepth,
 922                                  sizeof(char) * AP_DEVICES))
 923                         return -EFAULT;
 924                 return 0;
 925         }
 926         case Z90STAT_PERDEV_REQCNT: {
 927                 int reqcnt[AP_DEVICES];
 928                 zcrypt_perdev_reqcnt(reqcnt);
 929                 if (copy_to_user((int __user *) arg, reqcnt,
 930                                  sizeof(int) * AP_DEVICES))
 931                         return -EFAULT;
 932                 return 0;
 933         }
 934         case Z90STAT_REQUESTQ_COUNT:
 935                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
 936         case Z90STAT_PENDINGQ_COUNT:
 937                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
 938         case Z90STAT_TOTALOPEN_COUNT:
 939                 return put_user(atomic_read(&zcrypt_open_count),
 940                                 (int __user *) arg);
 941         case Z90STAT_DOMAIN_INDEX:
 942                 return put_user(ap_domain_index, (int __user *) arg);
 943         /*
 944          * Deprecated ioctls. Don't add another device count ioctl,
 945          * you can count them yourself in the user space with the
 946          * output of the Z90STAT_STATUS_MASK ioctl.
 947          */
 948         case ICAZ90STATUS:
 949                 return zcrypt_ica_status(filp, arg);
 950         case Z90STAT_TOTALCOUNT:
 951                 return put_user(zcrypt_device_count, (int __user *) arg);
 952         case Z90STAT_PCICACOUNT:
 953                 return put_user(zcrypt_count_type(ZCRYPT_PCICA),
 954                                 (int __user *) arg);
 955         case Z90STAT_PCICCCOUNT:
 956                 return put_user(zcrypt_count_type(ZCRYPT_PCICC),
 957                                 (int __user *) arg);
 958         case Z90STAT_PCIXCCMCL2COUNT:
 959                 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2),
 960                                 (int __user *) arg);
 961         case Z90STAT_PCIXCCMCL3COUNT:
 962                 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
 963                                 (int __user *) arg);
 964         case Z90STAT_PCIXCCCOUNT:
 965                 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) +
 966                                 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
 967                                 (int __user *) arg);
 968         case Z90STAT_CEX2CCOUNT:
 969                 return put_user(zcrypt_count_type(ZCRYPT_CEX2C),
 970                                 (int __user *) arg);
 971         case Z90STAT_CEX2ACOUNT:
 972                 return put_user(zcrypt_count_type(ZCRYPT_CEX2A),
 973                                 (int __user *) arg);
 974         default:
 975                 /* unknown ioctl number */
 976                 return -ENOIOCTLCMD;
 977         }
 978 }
 979
 980 #ifdef CONFIG_COMPAT
 981 /*
 982  * ioctl32 conversion routines
 983  */
 984 struct compat_ica_rsa_modexpo {
 985         compat_uptr_t   inputdata;
 986         unsigned int    inputdatalength;
 987         compat_uptr_t   outputdata;
 988         unsigned int    outputdatalength;
 989         compat_uptr_t   b_key;
 990         compat_uptr_t   n_modulus;
 991 };
 992
 993 static long trans_modexpo32(struct file *filp, unsigned int cmd,
 994                             unsigned long arg)
 995 {
 996         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
 997         struct compat_ica_rsa_modexpo mex32;
 998         struct ica_rsa_modexpo mex64;
 999         long rc;
1000
1001         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1002                 return -EFAULT;
1003         mex64.inputdata = compat_ptr(mex32.inputdata);
1004         mex64.inputdatalength = mex32.inputdatalength;
1005         mex64.outputdata = compat_ptr(mex32.outputdata);
1006         mex64.outputdatalength = mex32.outputdatalength;
1007         mex64.b_key = compat_ptr(mex32.b_key);
1008         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1009         do {
1010                 rc = zcrypt_rsa_modexpo(&mex64);
1011         } while (rc == -EAGAIN);
1012         /* on failure: retry once again after a requested rescan */
1013         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1014                 do {
1015                         rc = zcrypt_rsa_modexpo(&mex64);
1016                 } while (rc == -EAGAIN);
1017         if (rc)
1018                 return rc;
1019         return put_user(mex64.outputdatalength,
1020                         &umex32->outputdatalength);
1021 }
1022
1023 struct compat_ica_rsa_modexpo_crt {
1024         compat_uptr_t   inputdata;
1025         unsigned int    inputdatalength;
1026         compat_uptr_t   outputdata;
1027         unsigned int    outputdatalength;
1028         compat_uptr_t   bp_key;
1029         compat_uptr_t   bq_key;
1030         compat_uptr_t   np_prime;
1031         compat_uptr_t   nq_prime;
1032         compat_uptr_t   u_mult_inv;
1033 };
1034
1035 static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
1036                                 unsigned long arg)
1037 {
1038         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1039         struct compat_ica_rsa_modexpo_crt crt32;
1040         struct ica_rsa_modexpo_crt crt64;
1041         long rc;
1042
1043         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1044                 return -EFAULT;
1045         crt64.inputdata = compat_ptr(crt32.inputdata);
1046         crt64.inputdatalength = crt32.inputdatalength;
1047         crt64.outputdata=  compat_ptr(crt32.outputdata);
1048         crt64.outputdatalength = crt32.outputdatalength;
1049         crt64.bp_key = compat_ptr(crt32.bp_key);
1050         crt64.bq_key = compat_ptr(crt32.bq_key);
1051         crt64.np_prime = compat_ptr(crt32.np_prime);
1052         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1053         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1054         do {
1055                 rc = zcrypt_rsa_crt(&crt64);
1056         } while (rc == -EAGAIN);
1057         /* on failure: retry once again after a requested rescan */
1058         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1059                 do {
1060                         rc = zcrypt_rsa_crt(&crt64);
1061                 } while (rc == -EAGAIN);
1062         if (rc)
1063                 return rc;
1064         return put_user(crt64.outputdatalength,
1065                         &ucrt32->outputdatalength);
1066 }
1067
1068 struct compat_ica_xcRB {
1069         unsigned short  agent_ID;
1070         unsigned int    user_defined;
1071         unsigned short  request_ID;
1072         unsigned int    request_control_blk_length;
1073         unsigned char   padding1[16 - sizeof (compat_uptr_t)];
1074         compat_uptr_t   request_control_blk_addr;
1075         unsigned int    request_data_length;
1076         char            padding2[16 - sizeof (compat_uptr_t)];
1077         compat_uptr_t   request_data_address;
1078         unsigned int    reply_control_blk_length;
1079         char            padding3[16 - sizeof (compat_uptr_t)];
1080         compat_uptr_t   reply_control_blk_addr;
1081         unsigned int    reply_data_length;
1082         char            padding4[16 - sizeof (compat_uptr_t)];
1083         compat_uptr_t   reply_data_addr;
1084         unsigned short  priority_window;
1085         unsigned int    status;
1086 } __attribute__((packed));
1087
1088 static long trans_xcRB32(struct file *filp, unsigned int cmd,
1089                          unsigned long arg)
1090 {
1091         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1092         struct compat_ica_xcRB xcRB32;
1093         struct ica_xcRB xcRB64;
1094         long rc;
1095
1096         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1097                 return -EFAULT;
1098         xcRB64.agent_ID = xcRB32.agent_ID;
1099         xcRB64.user_defined = xcRB32.user_defined;
1100         xcRB64.request_ID = xcRB32.request_ID;
1101         xcRB64.request_control_blk_length =
1102                 xcRB32.request_control_blk_length;
1103         xcRB64.request_control_blk_addr =
1104                 compat_ptr(xcRB32.request_control_blk_addr);
1105         xcRB64.request_data_length =
1106                 xcRB32.request_data_length;
1107         xcRB64.request_data_address =
1108                 compat_ptr(xcRB32.request_data_address);
1109         xcRB64.reply_control_blk_length =
1110                 xcRB32.reply_control_blk_length;
1111         xcRB64.reply_control_blk_addr =
1112                 compat_ptr(xcRB32.reply_control_blk_addr);
1113         xcRB64.reply_data_length = xcRB32.reply_data_length;
1114         xcRB64.reply_data_addr =
1115                 compat_ptr(xcRB32.reply_data_addr);
1116         xcRB64.priority_window = xcRB32.priority_window;
1117         xcRB64.status = xcRB32.status;
1118         do {
1119                 rc = zcrypt_send_cprb(&xcRB64);
1120         } while (rc == -EAGAIN);
1121         /* on failure: retry once again after a requested rescan */
1122         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1123                 do {
1124                         rc = zcrypt_send_cprb(&xcRB64);
1125                 } while (rc == -EAGAIN);
1126         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1127         xcRB32.reply_data_length = xcRB64.reply_data_length;
1128         xcRB32.status = xcRB64.status;
1129         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1130                         return -EFAULT;
1131         return rc;
1132 }
1133
1134 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1135                          unsigned long arg)
1136 {
1137         if (cmd == ICARSAMODEXPO)
1138                 return trans_modexpo32(filp, cmd, arg);
1139         if (cmd == ICARSACRT)
1140                 return trans_modexpo_crt32(filp, cmd, arg);
1141         if (cmd == ZSECSENDCPRB)
1142                 return trans_xcRB32(filp, cmd, arg);
1143         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1144 }
1145 #endif
1146
1147 /*
1148  * Misc device file operations.
1149  */
1150 static const struct file_operations zcrypt_fops = {
1151         .owner          = THIS_MODULE,
1152         .read           = zcrypt_read,
1153         .write          = zcrypt_write,
1154         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1155 #ifdef CONFIG_COMPAT
1156         .compat_ioctl   = zcrypt_compat_ioctl,
1157 #endif
1158         .open           = zcrypt_open,
1159         .release        = zcrypt_release,
1160         .llseek         = no_llseek,
1161 };
1162
1163 /*
1164  * Misc device.
1165  */
1166 static struct miscdevice zcrypt_misc_device = {
1167         .minor      = MISC_DYNAMIC_MINOR,
1168         .name       = "z90crypt",
1169         .fops       = &zcrypt_fops,
1170 };
1171
1172 /*
1173  * Deprecated /proc entry support.
1174  */
1175 static struct proc_dir_entry *zcrypt_entry;
1176
1177 static void sprintcl(struct seq_file *m, unsigned char *addr, unsigned int len)
1178 {
1179         int i;
1180
1181         for (i = 0; i < len; i++)
1182                 seq_printf(m, "%01x", (unsigned int) addr[i]);
1183         seq_putc(m, ' ');
1184 }
1185
1186 static void sprintrw(struct seq_file *m, unsigned char *addr, unsigned int len)
1187 {
1188         int inl, c, cx;
1189
1190         seq_printf(m, "    ");
1191         inl = 0;
1192         for (c = 0; c < (len / 16); c++) {
1193                 sprintcl(m, addr+inl, 16);
1194                 inl += 16;
1195         }
1196         cx = len%16;
1197         if (cx) {
1198                 sprintcl(m, addr+inl, cx);
1199                 inl += cx;
1200         }
1201         seq_putc(m, '\n');
1202 }
1203
1204 static void sprinthx(unsigned char *title, struct seq_file *m,
1205                      unsigned char *addr, unsigned int len)
1206 {
1207         int inl, r, rx;
1208
1209         seq_printf(m, "\n%s\n", title);
1210         inl = 0;
1211         for (r = 0; r < (len / 64); r++) {
1212                 sprintrw(m, addr+inl, 64);
1213                 inl += 64;
1214         }
1215         rx = len % 64;
1216         if (rx) {
1217                 sprintrw(m, addr+inl, rx);
1218                 inl += rx;
1219         }
1220         seq_putc(m, '\n');
1221 }
1222
1223 static void sprinthx4(unsigned char *title, struct seq_file *m,
1224                       unsigned int *array, unsigned int len)
1225 {
1226         seq_printf(m, "\n%s\n", title);
1227         seq_hex_dump(m, "    ", DUMP_PREFIX_NONE, 32, 4, array, len, false);
1228         seq_putc(m, '\n');
1229 }
1230
1231 static int zcrypt_proc_show(struct seq_file *m, void *v)
1232 {
1233         char workarea[sizeof(int) * AP_DEVICES];
1234
1235         seq_printf(m, "\nzcrypt version: %d.%d.%d\n",
1236                    ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT);
1237         seq_printf(m, "Cryptographic domain: %d\n", ap_domain_index);
1238         seq_printf(m, "Total device count: %d\n", zcrypt_device_count);
1239         seq_printf(m, "PCICA count: %d\n", zcrypt_count_type(ZCRYPT_PCICA));
1240         seq_printf(m, "PCICC count: %d\n", zcrypt_count_type(ZCRYPT_PCICC));
1241         seq_printf(m, "PCIXCC MCL2 count: %d\n",
1242                    zcrypt_count_type(ZCRYPT_PCIXCC_MCL2));
1243         seq_printf(m, "PCIXCC MCL3 count: %d\n",
1244                    zcrypt_count_type(ZCRYPT_PCIXCC_MCL3));
1245         seq_printf(m, "CEX2C count: %d\n", zcrypt_count_type(ZCRYPT_CEX2C));
1246         seq_printf(m, "CEX2A count: %d\n", zcrypt_count_type(ZCRYPT_CEX2A));
1247         seq_printf(m, "CEX3C count: %d\n", zcrypt_count_type(ZCRYPT_CEX3C));
1248         seq_printf(m, "CEX3A count: %d\n", zcrypt_count_type(ZCRYPT_CEX3A));
1249         seq_printf(m, "requestq count: %d\n", zcrypt_requestq_count());
1250         seq_printf(m, "pendingq count: %d\n", zcrypt_pendingq_count());
1251         seq_printf(m, "Total open handles: %d\n\n",
1252                    atomic_read(&zcrypt_open_count));
1253         zcrypt_status_mask(workarea);
1254         sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) "
1255                  "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A",
1256                  m, workarea, AP_DEVICES);
1257         zcrypt_qdepth_mask(workarea);
1258         sprinthx("Waiting work element counts", m, workarea, AP_DEVICES);
1259         zcrypt_perdev_reqcnt((int *) workarea);
1260         sprinthx4("Per-device successfully completed request counts",
1261                   m, (unsigned int *) workarea, AP_DEVICES);
1262         return 0;
1263 }
1264
1265 static int zcrypt_proc_open(struct inode *inode, struct file *file)
1266 {
1267         return single_open(file, zcrypt_proc_show, NULL);
1268 }
1269
1270 static void zcrypt_disable_card(int index)
1271 {
1272         struct zcrypt_card *zc;
1273         struct zcrypt_queue *zq;
1274
1275         spin_lock(&zcrypt_list_lock);
1276         for_each_zcrypt_card(zc) {
1277                 for_each_zcrypt_queue(zq, zc) {
1278                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1279                                 continue;
1280                         zq->online = 0;
1281                         ap_flush_queue(zq->queue);
1282                 }
1283         }
1284         spin_unlock(&zcrypt_list_lock);
1285 }
1286
1287 static void zcrypt_enable_card(int index)
1288 {
1289         struct zcrypt_card *zc;
1290         struct zcrypt_queue *zq;
1291
1292         spin_lock(&zcrypt_list_lock);
1293         for_each_zcrypt_card(zc) {
1294                 for_each_zcrypt_queue(zq, zc) {
1295                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1296                                 continue;
1297                         zq->online = 1;
1298                         ap_flush_queue(zq->queue);
1299                 }
1300         }
1301         spin_unlock(&zcrypt_list_lock);
1302 }
1303
1304 static ssize_t zcrypt_proc_write(struct file *file, const char __user *buffer,
1305                                  size_t count, loff_t *pos)
1306 {
1307         unsigned char *lbuf, *ptr;
1308         size_t local_count;
1309         int j;
1310
1311         if (count <= 0)
1312                 return 0;
1313
1314 #define LBUFSIZE 1200UL
1315         lbuf = kmalloc(LBUFSIZE, GFP_KERNEL);
1316         if (!lbuf)
1317                 return 0;
1318
1319         local_count = min(LBUFSIZE - 1, count);
1320         if (copy_from_user(lbuf, buffer, local_count) != 0) {
1321                 kfree(lbuf);
1322                 return -EFAULT;
1323         }
1324         lbuf[local_count] = '\0';
1325
1326         ptr = strstr(lbuf, "Online devices");
1327         if (!ptr)
1328                 goto out;
1329         ptr = strstr(ptr, "\n");
1330         if (!ptr)
1331                 goto out;
1332         ptr++;
1333
1334         if (strstr(ptr, "Waiting work element counts") == NULL)
1335                 goto out;
1336
1337         for (j = 0; j < 64 && *ptr; ptr++) {
1338                 /*
1339                  * '0' for no device, '1' for PCICA, '2' for PCICC,
1340                  * '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3,
1341                  * '5' for CEX2C and '6' for CEX2A'
1342                  * '7' for CEX3C and '8' for CEX3A
1343                  */
1344                 if (*ptr >= '0' && *ptr <= '8')
1345                         j++;
1346                 else if (*ptr == 'd' || *ptr == 'D')
1347                         zcrypt_disable_card(j++);
1348                 else if (*ptr == 'e' || *ptr == 'E')
1349                         zcrypt_enable_card(j++);
1350                 else if (*ptr != ' ' && *ptr != '\t')
1351                         break;
1352         }
1353 out:
1354         kfree(lbuf);
1355         return count;
1356 }
1357
1358 static const struct file_operations zcrypt_proc_fops = {
1359         .owner          = THIS_MODULE,
1360         .open           = zcrypt_proc_open,
1361         .read           = seq_read,
1362         .llseek         = seq_lseek,
1363         .release        = single_release,
1364         .write          = zcrypt_proc_write,
1365 };
1366
1367 static int zcrypt_rng_device_count;
1368 static u32 *zcrypt_rng_buffer;
1369 static int zcrypt_rng_buffer_index;
1370 static DEFINE_MUTEX(zcrypt_rng_mutex);
1371
1372 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1373 {
1374         int rc;
1375
1376         /*
1377          * We don't need locking here because the RNG API guarantees serialized
1378          * read method calls.
1379          */
1380         if (zcrypt_rng_buffer_index == 0) {
1381                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1382                 /* on failure: retry once again after a requested rescan */
1383                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1384                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1385                 if (rc < 0)
1386                         return -EIO;
1387                 zcrypt_rng_buffer_index = rc / sizeof *data;
1388         }
1389         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1390         return sizeof *data;
1391 }
1392
1393 static struct hwrng zcrypt_rng_dev = {
1394         .name           = "zcrypt",
1395         .data_read      = zcrypt_rng_data_read,
1396         .quality        = 990,
1397 };
1398
1399 int zcrypt_rng_device_add(void)
1400 {
1401         int rc = 0;
1402
1403         mutex_lock(&zcrypt_rng_mutex);
1404         if (zcrypt_rng_device_count == 0) {
1405                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1406                 if (!zcrypt_rng_buffer) {
1407                         rc = -ENOMEM;
1408                         goto out;
1409                 }
1410                 zcrypt_rng_buffer_index = 0;
1411                 if (!zcrypt_hwrng_seed)
1412                         zcrypt_rng_dev.quality = 0;
1413                 rc = hwrng_register(&zcrypt_rng_dev);
1414                 if (rc)
1415                         goto out_free;
1416                 zcrypt_rng_device_count = 1;
1417         } else
1418                 zcrypt_rng_device_count++;
1419         mutex_unlock(&zcrypt_rng_mutex);
1420         return 0;
1421
1422 out_free:
1423         free_page((unsigned long) zcrypt_rng_buffer);
1424 out:
1425         mutex_unlock(&zcrypt_rng_mutex);
1426         return rc;
1427 }
1428
1429 void zcrypt_rng_device_remove(void)
1430 {
1431         mutex_lock(&zcrypt_rng_mutex);
1432         zcrypt_rng_device_count--;
1433         if (zcrypt_rng_device_count == 0) {
1434                 hwrng_unregister(&zcrypt_rng_dev);
1435                 free_page((unsigned long) zcrypt_rng_buffer);
1436         }
1437         mutex_unlock(&zcrypt_rng_mutex);
1438 }
1439
1440 int __init zcrypt_debug_init(void)
1441 {
1442         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1443                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
1444         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1445         debug_set_level(zcrypt_dbf_info, DBF_ERR);
1446
1447         return 0;
1448 }
1449
1450 void zcrypt_debug_exit(void)
1451 {
1452         debug_unregister(zcrypt_dbf_info);
1453 }
1454
1455 /**
1456  * zcrypt_api_init(): Module initialization.
1457  *
1458  * The module initialization code.
1459  */
1460 int __init zcrypt_api_init(void)
1461 {
1462         int rc;
1463
1464         rc = zcrypt_debug_init();
1465         if (rc)
1466                 goto out;
1467
1468         atomic_set(&zcrypt_rescan_req, 0);
1469
1470         /* Register the request sprayer. */
1471         rc = misc_register(&zcrypt_misc_device);
1472         if (rc < 0)
1473                 goto out;
1474
1475         /* Set up the proc file system */
1476         zcrypt_entry = proc_create("driver/z90crypt", 0644, NULL,
1477                                    &zcrypt_proc_fops);
1478         if (!zcrypt_entry) {
1479                 rc = -ENOMEM;
1480                 goto out_misc;
1481         }
1482
1483         zcrypt_msgtype6_init();
1484         zcrypt_msgtype50_init();
1485         return 0;
1486
1487 out_misc:
1488         misc_deregister(&zcrypt_misc_device);
1489 out:
1490         return rc;
1491 }
1492
1493 /**
1494  * zcrypt_api_exit(): Module termination.
1495  *
1496  * The module termination code.
1497  */
1498 void __exit zcrypt_api_exit(void)
1499 {
1500         remove_proc_entry("driver/z90crypt", NULL);
1501         misc_deregister(&zcrypt_misc_device);
1502         zcrypt_msgtype6_exit();
1503         zcrypt_msgtype50_exit();
1504         zcrypt_debug_exit();
1505 }
1506
1507 module_init(zcrypt_api_init);
1508 module_exit(zcrypt_api_exit);