1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Copyright IBM Corp. 2001, 2018 4 * Author(s): Robert Burroughs 5 * Eric Rossman (edrossma@us.ibm.com) 6 * Cornelia Huck <cornelia.huck@de.ibm.com> 7 * 8 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com) 9 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com> 10 * Ralph Wuerthner <rwuerthn@de.ibm.com> 11 * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com> 12 * Multiple device nodes: Harald Freudenberger <freude@linux.ibm.com> 13 */ 14 15#define KMSG_COMPONENT "zcrypt" 16#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 17 18#include <linux/module.h> 19#include <linux/init.h> 20#include <linux/interrupt.h> 21#include <linux/miscdevice.h> 22#include <linux/fs.h> 23#include <linux/compat.h> 24#include <linux/slab.h> 25#include <linux/atomic.h> 26#include <linux/uaccess.h> 27#include <linux/hw_random.h> 28#include <linux/debugfs.h> 29#include <linux/cdev.h> 30#include <linux/ctype.h> 31#include <linux/capability.h> 32#include <asm/debug.h> 33 34#define CREATE_TRACE_POINTS 35#include <asm/trace/zcrypt.h> 36 37#include "zcrypt_api.h" 38#include "zcrypt_debug.h" 39 40#include "zcrypt_msgtype6.h" 41#include "zcrypt_msgtype50.h" 42#include "zcrypt_ccamisc.h" 43#include "zcrypt_ep11misc.h" 44 45/* 46 * Module description. 47 */ 48MODULE_AUTHOR("IBM Corporation"); 49MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \ 50 "Copyright IBM Corp. 2001, 2012"); 51MODULE_LICENSE("GPL"); 52 53/* 54 * zcrypt tracepoint functions 55 */ 56EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req); 57EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep); 58 59DEFINE_SPINLOCK(zcrypt_list_lock); 60LIST_HEAD(zcrypt_card_list); 61 62static atomic_t zcrypt_open_count = ATOMIC_INIT(0); 63 64static LIST_HEAD(zcrypt_ops_list); 65 66/* Zcrypt related debug feature stuff. */ 67debug_info_t *zcrypt_dbf_info; 68 69/* 70 * Process a rescan of the transport layer. 71 * Runs a synchronous AP bus rescan. 72 * Returns true if something has changed (for example the 73 * bus scan has found and build up new devices) and it is 74 * worth to do a retry. Otherwise false is returned meaning 75 * no changes on the AP bus level. 76 */ 77static inline bool zcrypt_process_rescan(void) 78{ 79 return ap_bus_force_rescan(); 80} 81 82void zcrypt_msgtype_register(struct zcrypt_ops *zops) 83{ 84 list_add_tail(&zops->list, &zcrypt_ops_list); 85} 86 87void zcrypt_msgtype_unregister(struct zcrypt_ops *zops) 88{ 89 list_del_init(&zops->list); 90} 91 92struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant) 93{ 94 struct zcrypt_ops *zops; 95 96 list_for_each_entry(zops, &zcrypt_ops_list, list) 97 if (zops->variant == variant && 98 (!strncmp(zops->name, name, sizeof(zops->name)))) 99 return zops; 100 return NULL; 101} 102EXPORT_SYMBOL(zcrypt_msgtype); 103 104/* 105 * Multi device nodes extension functions. 106 */ 107 108struct zcdn_device; 109 110static void zcdn_device_release(struct device *dev); 111static const struct class zcrypt_class = { 112 .name = ZCRYPT_NAME, 113 .dev_release = zcdn_device_release, 114}; 115static dev_t zcrypt_devt; 116static struct cdev zcrypt_cdev; 117 118struct zcdn_device { 119 struct device device; 120 struct ap_perms perms; 121}; 122 123#define to_zcdn_dev(x) container_of((x), struct zcdn_device, device) 124 125#define ZCDN_MAX_NAME 32 126 127static int zcdn_create(const char *name); 128static int zcdn_destroy(const char *name); 129 130/* 131 * Find zcdn device by name. 132 * Returns reference to the zcdn device which needs to be released 133 * with put_device() after use. 134 */ 135static inline struct zcdn_device *find_zcdndev_by_name(const char *name) 136{ 137 struct device *dev = class_find_device_by_name(&zcrypt_class, name); 138 139 return dev ? to_zcdn_dev(dev) : NULL; 140} 141 142/* 143 * Find zcdn device by devt value. 144 * Returns reference to the zcdn device which needs to be released 145 * with put_device() after use. 146 */ 147static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt) 148{ 149 struct device *dev = class_find_device_by_devt(&zcrypt_class, devt); 150 151 return dev ? to_zcdn_dev(dev) : NULL; 152} 153 154static ssize_t ioctlmask_show(struct device *dev, 155 struct device_attribute *attr, 156 char *buf) 157{ 158 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 159 int i, n; 160 161 if (mutex_lock_interruptible(&ap_perms_mutex)) 162 return -ERESTARTSYS; 163 164 n = sysfs_emit(buf, "0x"); 165 for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++) 166 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.ioctlm[i]); 167 n += sysfs_emit_at(buf, n, "\n"); 168 169 mutex_unlock(&ap_perms_mutex); 170 171 return n; 172} 173 174static ssize_t ioctlmask_store(struct device *dev, 175 struct device_attribute *attr, 176 const char *buf, size_t count) 177{ 178 int rc; 179 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 180 181 rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm, 182 AP_IOCTLS, &ap_perms_mutex); 183 if (rc) 184 return rc; 185 186 return count; 187} 188 189static DEVICE_ATTR_RW(ioctlmask); 190 191static ssize_t apmask_show(struct device *dev, 192 struct device_attribute *attr, 193 char *buf) 194{ 195 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 196 int i, n; 197 198 if (mutex_lock_interruptible(&ap_perms_mutex)) 199 return -ERESTARTSYS; 200 201 n = sysfs_emit(buf, "0x"); 202 for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++) 203 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.apm[i]); 204 n += sysfs_emit_at(buf, n, "\n"); 205 206 mutex_unlock(&ap_perms_mutex); 207 208 return n; 209} 210 211static ssize_t apmask_store(struct device *dev, 212 struct device_attribute *attr, 213 const char *buf, size_t count) 214{ 215 int rc; 216 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 217 218 rc = ap_parse_mask_str(buf, zcdndev->perms.apm, 219 AP_DEVICES, &ap_perms_mutex); 220 if (rc) 221 return rc; 222 223 return count; 224} 225 226static DEVICE_ATTR_RW(apmask); 227 228static ssize_t aqmask_show(struct device *dev, 229 struct device_attribute *attr, 230 char *buf) 231{ 232 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 233 int i, n; 234 235 if (mutex_lock_interruptible(&ap_perms_mutex)) 236 return -ERESTARTSYS; 237 238 n = sysfs_emit(buf, "0x"); 239 for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++) 240 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.aqm[i]); 241 n += sysfs_emit_at(buf, n, "\n"); 242 243 mutex_unlock(&ap_perms_mutex); 244 245 return n; 246} 247 248static ssize_t aqmask_store(struct device *dev, 249 struct device_attribute *attr, 250 const char *buf, size_t count) 251{ 252 int rc; 253 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 254 255 rc = ap_parse_mask_str(buf, zcdndev->perms.aqm, 256 AP_DOMAINS, &ap_perms_mutex); 257 if (rc) 258 return rc; 259 260 return count; 261} 262 263static DEVICE_ATTR_RW(aqmask); 264 265static ssize_t admask_show(struct device *dev, 266 struct device_attribute *attr, 267 char *buf) 268{ 269 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 270 int i, n; 271 272 if (mutex_lock_interruptible(&ap_perms_mutex)) 273 return -ERESTARTSYS; 274 275 n = sysfs_emit(buf, "0x"); 276 for (i = 0; i < sizeof(zcdndev->perms.adm) / sizeof(long); i++) 277 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.adm[i]); 278 n += sysfs_emit_at(buf, n, "\n"); 279 280 mutex_unlock(&ap_perms_mutex); 281 282 return n; 283} 284 285static ssize_t admask_store(struct device *dev, 286 struct device_attribute *attr, 287 const char *buf, size_t count) 288{ 289 int rc; 290 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 291 292 rc = ap_parse_mask_str(buf, zcdndev->perms.adm, 293 AP_DOMAINS, &ap_perms_mutex); 294 if (rc) 295 return rc; 296 297 return count; 298} 299 300static DEVICE_ATTR_RW(admask); 301 302static struct attribute *zcdn_dev_attrs[] = { 303 &dev_attr_ioctlmask.attr, 304 &dev_attr_apmask.attr, 305 &dev_attr_aqmask.attr, 306 &dev_attr_admask.attr, 307 NULL 308}; 309 310static struct attribute_group zcdn_dev_attr_group = { 311 .attrs = zcdn_dev_attrs 312}; 313 314static const struct attribute_group *zcdn_dev_attr_groups[] = { 315 &zcdn_dev_attr_group, 316 NULL 317}; 318 319static ssize_t zcdn_create_store(const struct class *class, 320 const struct class_attribute *attr, 321 const char *buf, size_t count) 322{ 323 int rc; 324 char name[ZCDN_MAX_NAME]; 325 326 strscpy(name, skip_spaces(buf), sizeof(name)); 327 328 rc = zcdn_create(strim(name)); 329 330 return rc ? rc : count; 331} 332 333static const struct class_attribute class_attr_zcdn_create = 334 __ATTR(create, 0600, NULL, zcdn_create_store); 335 336static ssize_t zcdn_destroy_store(const struct class *class, 337 const struct class_attribute *attr, 338 const char *buf, size_t count) 339{ 340 int rc; 341 char name[ZCDN_MAX_NAME]; 342 343 strscpy(name, skip_spaces(buf), sizeof(name)); 344 345 rc = zcdn_destroy(strim(name)); 346 347 return rc ? rc : count; 348} 349 350static const struct class_attribute class_attr_zcdn_destroy = 351 __ATTR(destroy, 0600, NULL, zcdn_destroy_store); 352 353static void zcdn_device_release(struct device *dev) 354{ 355 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 356 357 ZCRYPT_DBF_INFO("%s releasing zcdn device %d:%d\n", 358 __func__, MAJOR(dev->devt), MINOR(dev->devt)); 359 360 kfree(zcdndev); 361} 362 363static int zcdn_create(const char *name) 364{ 365 dev_t devt; 366 int i, rc = 0; 367 struct zcdn_device *zcdndev; 368 369 if (mutex_lock_interruptible(&ap_perms_mutex)) 370 return -ERESTARTSYS; 371 372 /* check if device node with this name already exists */ 373 if (name[0]) { 374 zcdndev = find_zcdndev_by_name(name); 375 if (zcdndev) { 376 put_device(&zcdndev->device); 377 rc = -EEXIST; 378 goto unlockout; 379 } 380 } 381 382 /* find an unused minor number */ 383 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) { 384 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i); 385 zcdndev = find_zcdndev_by_devt(devt); 386 if (zcdndev) 387 put_device(&zcdndev->device); 388 else 389 break; 390 } 391 if (i == ZCRYPT_MAX_MINOR_NODES) { 392 rc = -ENOSPC; 393 goto unlockout; 394 } 395 396 /* alloc and prepare a new zcdn device */ 397 zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL); 398 if (!zcdndev) { 399 rc = -ENOMEM; 400 goto unlockout; 401 } 402 zcdndev->device.release = zcdn_device_release; 403 zcdndev->device.class = &zcrypt_class; 404 zcdndev->device.devt = devt; 405 zcdndev->device.groups = zcdn_dev_attr_groups; 406 if (name[0]) 407 rc = dev_set_name(&zcdndev->device, "%s", name); 408 else 409 rc = dev_set_name(&zcdndev->device, ZCRYPT_NAME "_%d", (int)MINOR(devt)); 410 if (rc) { 411 kfree(zcdndev); 412 goto unlockout; 413 } 414 rc = device_register(&zcdndev->device); 415 if (rc) { 416 put_device(&zcdndev->device); 417 goto unlockout; 418 } 419 420 ZCRYPT_DBF_INFO("%s created zcdn device %d:%d\n", 421 __func__, MAJOR(devt), MINOR(devt)); 422 423unlockout: 424 mutex_unlock(&ap_perms_mutex); 425 return rc; 426} 427 428static int zcdn_destroy(const char *name) 429{ 430 int rc = 0; 431 struct zcdn_device *zcdndev; 432 433 if (mutex_lock_interruptible(&ap_perms_mutex)) 434 return -ERESTARTSYS; 435 436 /* try to find this zcdn device */ 437 zcdndev = find_zcdndev_by_name(name); 438 if (!zcdndev) { 439 rc = -ENOENT; 440 goto unlockout; 441 } 442 443 /* 444 * The zcdn device is not hard destroyed. It is subject to 445 * reference counting and thus just needs to be unregistered. 446 */ 447 put_device(&zcdndev->device); 448 device_unregister(&zcdndev->device); 449 450unlockout: 451 mutex_unlock(&ap_perms_mutex); 452 return rc; 453} 454 455static void zcdn_destroy_all(void) 456{ 457 int i; 458 dev_t devt; 459 struct zcdn_device *zcdndev; 460 461 mutex_lock(&ap_perms_mutex); 462 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) { 463 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i); 464 zcdndev = find_zcdndev_by_devt(devt); 465 if (zcdndev) { 466 put_device(&zcdndev->device); 467 device_unregister(&zcdndev->device); 468 } 469 } 470 mutex_unlock(&ap_perms_mutex); 471} 472 473/* 474 * zcrypt_read (): Not supported beyond zcrypt 1.3.1. 475 * 476 * This function is not supported beyond zcrypt 1.3.1. 477 */ 478static ssize_t zcrypt_read(struct file *filp, char __user *buf, 479 size_t count, loff_t *f_pos) 480{ 481 return -EPERM; 482} 483 484/* 485 * zcrypt_write(): Not allowed. 486 * 487 * Write is not allowed 488 */ 489static ssize_t zcrypt_write(struct file *filp, const char __user *buf, 490 size_t count, loff_t *f_pos) 491{ 492 return -EPERM; 493} 494 495/* 496 * zcrypt_open(): Count number of users. 497 * 498 * Device open function to count number of users. 499 */ 500static int zcrypt_open(struct inode *inode, struct file *filp) 501{ 502 struct ap_perms *perms = &ap_perms; 503 504 if (filp->f_inode->i_cdev == &zcrypt_cdev) { 505 struct zcdn_device *zcdndev; 506 507 if (mutex_lock_interruptible(&ap_perms_mutex)) 508 return -ERESTARTSYS; 509 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev); 510 /* find returns a reference, no get_device() needed */ 511 mutex_unlock(&ap_perms_mutex); 512 if (zcdndev) 513 perms = &zcdndev->perms; 514 } 515 filp->private_data = (void *)perms; 516 517 atomic_inc(&zcrypt_open_count); 518 return stream_open(inode, filp); 519} 520 521/* 522 * zcrypt_release(): Count number of users. 523 * 524 * Device close function to count number of users. 525 */ 526static int zcrypt_release(struct inode *inode, struct file *filp) 527{ 528 if (filp->f_inode->i_cdev == &zcrypt_cdev) { 529 struct zcdn_device *zcdndev; 530 531 mutex_lock(&ap_perms_mutex); 532 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev); 533 mutex_unlock(&ap_perms_mutex); 534 if (zcdndev) { 535 /* 2 puts here: one for find, one for open */ 536 put_device(&zcdndev->device); 537 put_device(&zcdndev->device); 538 } 539 } 540 541 atomic_dec(&zcrypt_open_count); 542 return 0; 543} 544 545static inline int zcrypt_check_ioctl(struct ap_perms *perms, 546 unsigned int cmd) 547{ 548 int rc = -EPERM; 549 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT; 550 551 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) { 552 if (test_bit_inv(ioctlnr, perms->ioctlm)) 553 rc = 0; 554 } 555 556 if (rc) 557 ZCRYPT_DBF_WARN("%s ioctl check failed: ioctlnr=0x%04x rc=%d\n", 558 __func__, ioctlnr, rc); 559 560 return rc; 561} 562 563static inline bool zcrypt_check_card(struct ap_perms *perms, int card) 564{ 565 return test_bit_inv(card, perms->apm) ? true : false; 566} 567 568static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue) 569{ 570 return test_bit_inv(queue, perms->aqm) ? true : false; 571} 572 573static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc, 574 struct zcrypt_queue *zq, 575 struct module **pmod, 576 unsigned int weight) 577{ 578 if (!zq || !try_module_get(zq->queue->ap_dev.device.driver->owner)) 579 return NULL; 580 zcrypt_card_get(zc); 581 zcrypt_queue_get(zq); 582 get_device(&zq->queue->ap_dev.device); 583 atomic_add(weight, &zc->load); 584 atomic_add(weight, &zq->load); 585 zq->request_count++; 586 *pmod = zq->queue->ap_dev.device.driver->owner; 587 return zq; 588} 589 590static inline void zcrypt_drop_queue(struct zcrypt_card *zc, 591 struct zcrypt_queue *zq, 592 struct module *mod, 593 unsigned int weight) 594{ 595 zq->request_count--; 596 atomic_sub(weight, &zc->load); 597 atomic_sub(weight, &zq->load); 598 put_device(&zq->queue->ap_dev.device); 599 zcrypt_queue_put(zq); 600 zcrypt_card_put(zc); 601 module_put(mod); 602} 603 604static inline bool zcrypt_card_compare(struct zcrypt_card *zc, 605 struct zcrypt_card *pref_zc, 606 unsigned int weight, 607 unsigned int pref_weight) 608{ 609 if (!pref_zc) 610 return true; 611 weight += atomic_read(&zc->load); 612 pref_weight += atomic_read(&pref_zc->load); 613 if (weight == pref_weight) 614 return atomic64_read(&zc->card->total_request_count) < 615 atomic64_read(&pref_zc->card->total_request_count); 616 return weight < pref_weight; 617} 618 619static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq, 620 struct zcrypt_queue *pref_zq, 621 unsigned int weight, 622 unsigned int pref_weight) 623{ 624 if (!pref_zq) 625 return true; 626 weight += atomic_read(&zq->load); 627 pref_weight += atomic_read(&pref_zq->load); 628 if (weight == pref_weight) 629 return zq->queue->total_request_count < 630 pref_zq->queue->total_request_count; 631 return weight < pref_weight; 632} 633 634/* 635 * zcrypt ioctls. 636 */ 637static long zcrypt_rsa_modexpo(struct ap_perms *perms, 638 struct zcrypt_track *tr, 639 struct ica_rsa_modexpo *mex) 640{ 641 struct zcrypt_card *zc, *pref_zc; 642 struct zcrypt_queue *zq, *pref_zq; 643 struct ap_message ap_msg; 644 unsigned int wgt = 0, pref_wgt = 0; 645 unsigned int func_code; 646 int cpen, qpen, qid = 0, rc = -ENODEV; 647 struct module *mod; 648 649 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO); 650 651 ap_init_message(&ap_msg); 652 653 if (mex->outputdatalength < mex->inputdatalength) { 654 func_code = 0; 655 rc = -EINVAL; 656 goto out; 657 } 658 659 /* 660 * As long as outputdatalength is big enough, we can set the 661 * outputdatalength equal to the inputdatalength, since that is the 662 * number of bytes we will copy in any case 663 */ 664 mex->outputdatalength = mex->inputdatalength; 665 666 rc = get_rsa_modex_fc(mex, &func_code); 667 if (rc) 668 goto out; 669 670 pref_zc = NULL; 671 pref_zq = NULL; 672 spin_lock(&zcrypt_list_lock); 673 for_each_zcrypt_card(zc) { 674 /* Check for usable accelerator or CCA card */ 675 if (!zc->online || !zc->card->config || zc->card->chkstop || 676 !(zc->card->hwinfo.accel || zc->card->hwinfo.cca)) 677 continue; 678 /* Check for size limits */ 679 if (zc->min_mod_size > mex->inputdatalength || 680 zc->max_mod_size < mex->inputdatalength) 681 continue; 682 /* check if device node has admission for this card */ 683 if (!zcrypt_check_card(perms, zc->card->id)) 684 continue; 685 /* get weight index of the card device */ 686 wgt = zc->speed_rating[func_code]; 687 /* penalty if this msg was previously sent via this card */ 688 cpen = (tr && tr->again_counter && tr->last_qid && 689 AP_QID_CARD(tr->last_qid) == zc->card->id) ? 690 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; 691 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) 692 continue; 693 for_each_zcrypt_queue(zq, zc) { 694 /* check if device is usable and eligible */ 695 if (!zq->online || !zq->ops->rsa_modexpo || 696 !ap_queue_usable(zq->queue)) 697 continue; 698 /* check if device node has admission for this queue */ 699 if (!zcrypt_check_queue(perms, 700 AP_QID_QUEUE(zq->queue->qid))) 701 continue; 702 /* penalty if the msg was previously sent at this qid */ 703 qpen = (tr && tr->again_counter && tr->last_qid && 704 tr->last_qid == zq->queue->qid) ? 705 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; 706 if (!zcrypt_queue_compare(zq, pref_zq, 707 wgt + cpen + qpen, pref_wgt)) 708 continue; 709 pref_zc = zc; 710 pref_zq = zq; 711 pref_wgt = wgt + cpen + qpen; 712 } 713 } 714 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 715 spin_unlock(&zcrypt_list_lock); 716 717 if (!pref_zq) { 718 pr_debug("%s no matching queue found => ENODEV\n", __func__); 719 rc = -ENODEV; 720 goto out; 721 } 722 723 qid = pref_zq->queue->qid; 724 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg); 725 726 spin_lock(&zcrypt_list_lock); 727 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 728 spin_unlock(&zcrypt_list_lock); 729 730out: 731 ap_release_message(&ap_msg); 732 if (tr) { 733 tr->last_rc = rc; 734 tr->last_qid = qid; 735 } 736 trace_s390_zcrypt_rep(mex, func_code, rc, 737 AP_QID_CARD(qid), AP_QID_QUEUE(qid)); 738 return rc; 739} 740 741static long zcrypt_rsa_crt(struct ap_perms *perms, 742 struct zcrypt_track *tr, 743 struct ica_rsa_modexpo_crt *crt) 744{ 745 struct zcrypt_card *zc, *pref_zc; 746 struct zcrypt_queue *zq, *pref_zq; 747 struct ap_message ap_msg; 748 unsigned int wgt = 0, pref_wgt = 0; 749 unsigned int func_code; 750 int cpen, qpen, qid = 0, rc = -ENODEV; 751 struct module *mod; 752 753 trace_s390_zcrypt_req(crt, TP_ICARSACRT); 754 755 ap_init_message(&ap_msg); 756 757 if (crt->outputdatalength < crt->inputdatalength) { 758 func_code = 0; 759 rc = -EINVAL; 760 goto out; 761 } 762 763 /* 764 * As long as outputdatalength is big enough, we can set the 765 * outputdatalength equal to the inputdatalength, since that is the 766 * number of bytes we will copy in any case 767 */ 768 crt->outputdatalength = crt->inputdatalength; 769 770 rc = get_rsa_crt_fc(crt, &func_code); 771 if (rc) 772 goto out; 773 774 pref_zc = NULL; 775 pref_zq = NULL; 776 spin_lock(&zcrypt_list_lock); 777 for_each_zcrypt_card(zc) { 778 /* Check for usable accelerator or CCA card */ 779 if (!zc->online || !zc->card->config || zc->card->chkstop || 780 !(zc->card->hwinfo.accel || zc->card->hwinfo.cca)) 781 continue; 782 /* Check for size limits */ 783 if (zc->min_mod_size > crt->inputdatalength || 784 zc->max_mod_size < crt->inputdatalength) 785 continue; 786 /* check if device node has admission for this card */ 787 if (!zcrypt_check_card(perms, zc->card->id)) 788 continue; 789 /* get weight index of the card device */ 790 wgt = zc->speed_rating[func_code]; 791 /* penalty if this msg was previously sent via this card */ 792 cpen = (tr && tr->again_counter && tr->last_qid && 793 AP_QID_CARD(tr->last_qid) == zc->card->id) ? 794 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; 795 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) 796 continue; 797 for_each_zcrypt_queue(zq, zc) { 798 /* check if device is usable and eligible */ 799 if (!zq->online || !zq->ops->rsa_modexpo_crt || 800 !ap_queue_usable(zq->queue)) 801 continue; 802 /* check if device node has admission for this queue */ 803 if (!zcrypt_check_queue(perms, 804 AP_QID_QUEUE(zq->queue->qid))) 805 continue; 806 /* penalty if the msg was previously sent at this qid */ 807 qpen = (tr && tr->again_counter && tr->last_qid && 808 tr->last_qid == zq->queue->qid) ? 809 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; 810 if (!zcrypt_queue_compare(zq, pref_zq, 811 wgt + cpen + qpen, pref_wgt)) 812 continue; 813 pref_zc = zc; 814 pref_zq = zq; 815 pref_wgt = wgt + cpen + qpen; 816 } 817 } 818 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 819 spin_unlock(&zcrypt_list_lock); 820 821 if (!pref_zq) { 822 pr_debug("%s no matching queue found => ENODEV\n", __func__); 823 rc = -ENODEV; 824 goto out; 825 } 826 827 qid = pref_zq->queue->qid; 828 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg); 829 830 spin_lock(&zcrypt_list_lock); 831 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 832 spin_unlock(&zcrypt_list_lock); 833 834out: 835 ap_release_message(&ap_msg); 836 if (tr) { 837 tr->last_rc = rc; 838 tr->last_qid = qid; 839 } 840 trace_s390_zcrypt_rep(crt, func_code, rc, 841 AP_QID_CARD(qid), AP_QID_QUEUE(qid)); 842 return rc; 843} 844 845static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms, 846 struct zcrypt_track *tr, 847 struct ica_xcRB *xcrb) 848{ 849 struct zcrypt_card *zc, *pref_zc; 850 struct zcrypt_queue *zq, *pref_zq; 851 struct ap_message ap_msg; 852 unsigned int wgt = 0, pref_wgt = 0; 853 unsigned int func_code; 854 unsigned short *domain, tdom; 855 int cpen, qpen, qid = 0, rc = -ENODEV; 856 struct module *mod; 857 858 trace_s390_zcrypt_req(xcrb, TB_ZSECSENDCPRB); 859 860 xcrb->status = 0; 861 ap_init_message(&ap_msg); 862 863 rc = prep_cca_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain); 864 if (rc) 865 goto out; 866 print_hex_dump_debug("ccareq: ", DUMP_PREFIX_ADDRESS, 16, 1, 867 ap_msg.msg, ap_msg.len, false); 868 869 tdom = *domain; 870 if (perms != &ap_perms && tdom < AP_DOMAINS) { 871 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) { 872 if (!test_bit_inv(tdom, perms->adm)) { 873 rc = -ENODEV; 874 goto out; 875 } 876 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) { 877 rc = -EOPNOTSUPP; 878 goto out; 879 } 880 } 881 /* 882 * If a valid target domain is set and this domain is NOT a usage 883 * domain but a control only domain, autoselect target domain. 884 */ 885 if (tdom < AP_DOMAINS && 886 !ap_test_config_usage_domain(tdom) && 887 ap_test_config_ctrl_domain(tdom)) 888 tdom = AUTOSEL_DOM; 889 890 pref_zc = NULL; 891 pref_zq = NULL; 892 spin_lock(&zcrypt_list_lock); 893 for_each_zcrypt_card(zc) { 894 /* Check for usable CCA card */ 895 if (!zc->online || !zc->card->config || zc->card->chkstop || 896 !zc->card->hwinfo.cca) 897 continue; 898 /* Check for user selected CCA card */ 899 if (xcrb->user_defined != AUTOSELECT && 900 xcrb->user_defined != zc->card->id) 901 continue; 902 /* check if request size exceeds card max msg size */ 903 if (ap_msg.len > zc->card->maxmsgsize) 904 continue; 905 /* check if device node has admission for this card */ 906 if (!zcrypt_check_card(perms, zc->card->id)) 907 continue; 908 /* get weight index of the card device */ 909 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY]; 910 /* penalty if this msg was previously sent via this card */ 911 cpen = (tr && tr->again_counter && tr->last_qid && 912 AP_QID_CARD(tr->last_qid) == zc->card->id) ? 913 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; 914 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) 915 continue; 916 for_each_zcrypt_queue(zq, zc) { 917 /* check for device usable and eligible */ 918 if (!zq->online || !zq->ops->send_cprb || 919 !ap_queue_usable(zq->queue) || 920 (tdom != AUTOSEL_DOM && 921 tdom != AP_QID_QUEUE(zq->queue->qid))) 922 continue; 923 /* check if device node has admission for this queue */ 924 if (!zcrypt_check_queue(perms, 925 AP_QID_QUEUE(zq->queue->qid))) 926 continue; 927 /* penalty if the msg was previously sent at this qid */ 928 qpen = (tr && tr->again_counter && tr->last_qid && 929 tr->last_qid == zq->queue->qid) ? 930 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; 931 if (!zcrypt_queue_compare(zq, pref_zq, 932 wgt + cpen + qpen, pref_wgt)) 933 continue; 934 pref_zc = zc; 935 pref_zq = zq; 936 pref_wgt = wgt + cpen + qpen; 937 } 938 } 939 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 940 spin_unlock(&zcrypt_list_lock); 941 942 if (!pref_zq) { 943 pr_debug("%s no match for address %02x.%04x => ENODEV\n", 944 __func__, xcrb->user_defined, *domain); 945 rc = -ENODEV; 946 goto out; 947 } 948 949 /* in case of auto select, provide the correct domain */ 950 qid = pref_zq->queue->qid; 951 if (*domain == AUTOSEL_DOM) 952 *domain = AP_QID_QUEUE(qid); 953 954 rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcrb, &ap_msg); 955 if (!rc) { 956 print_hex_dump_debug("ccarpl: ", DUMP_PREFIX_ADDRESS, 16, 1, 957 ap_msg.msg, ap_msg.len, false); 958 } 959 960 spin_lock(&zcrypt_list_lock); 961 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 962 spin_unlock(&zcrypt_list_lock); 963 964out: 965 ap_release_message(&ap_msg); 966 if (tr) { 967 tr->last_rc = rc; 968 tr->last_qid = qid; 969 } 970 trace_s390_zcrypt_rep(xcrb, func_code, rc, 971 AP_QID_CARD(qid), AP_QID_QUEUE(qid)); 972 return rc; 973} 974 975long zcrypt_send_cprb(struct ica_xcRB *xcrb) 976{ 977 struct zcrypt_track tr; 978 int rc; 979 980 memset(&tr, 0, sizeof(tr)); 981 982 do { 983 rc = _zcrypt_send_cprb(false, &ap_perms, &tr, xcrb); 984 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 985 986 /* on ENODEV failure: retry once again after a requested rescan */ 987 if (rc == -ENODEV && zcrypt_process_rescan()) 988 do { 989 rc = _zcrypt_send_cprb(false, &ap_perms, &tr, xcrb); 990 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 991 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 992 rc = -EIO; 993 if (rc) 994 pr_debug("%s rc=%d\n", __func__, rc); 995 996 return rc; 997} 998EXPORT_SYMBOL(zcrypt_send_cprb); 999 1000static bool is_desired_ep11_card(unsigned int dev_id, 1001 unsigned short target_num, 1002 struct ep11_target_dev *targets) 1003{ 1004 while (target_num-- > 0) { 1005 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP) 1006 return true; 1007 targets++; 1008 } 1009 return false; 1010} 1011 1012static bool is_desired_ep11_queue(unsigned int dev_qid, 1013 unsigned short target_num, 1014 struct ep11_target_dev *targets) 1015{ 1016 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid); 1017 1018 while (target_num-- > 0) { 1019 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) && 1020 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM)) 1021 return true; 1022 targets++; 1023 } 1024 return false; 1025} 1026 1027static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms, 1028 struct zcrypt_track *tr, 1029 struct ep11_urb *xcrb) 1030{ 1031 struct zcrypt_card *zc, *pref_zc; 1032 struct zcrypt_queue *zq, *pref_zq; 1033 struct ep11_target_dev *targets; 1034 unsigned short target_num; 1035 unsigned int wgt = 0, pref_wgt = 0; 1036 unsigned int func_code, domain; 1037 struct ap_message ap_msg; 1038 int cpen, qpen, qid = 0, rc = -ENODEV; 1039 struct module *mod; 1040 1041 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB); 1042 1043 ap_init_message(&ap_msg); 1044 1045 target_num = (unsigned short)xcrb->targets_num; 1046 1047 /* empty list indicates autoselect (all available targets) */ 1048 targets = NULL; 1049 if (target_num != 0) { 1050 struct ep11_target_dev __user *uptr; 1051 1052 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL); 1053 if (!targets) { 1054 func_code = 0; 1055 rc = -ENOMEM; 1056 goto out; 1057 } 1058 1059 uptr = (struct ep11_target_dev __force __user *)xcrb->targets; 1060 if (z_copy_from_user(userspace, targets, uptr, 1061 target_num * sizeof(*targets))) { 1062 func_code = 0; 1063 rc = -EFAULT; 1064 goto out_free; 1065 } 1066 } 1067 1068 rc = prep_ep11_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain); 1069 if (rc) 1070 goto out_free; 1071 print_hex_dump_debug("ep11req: ", DUMP_PREFIX_ADDRESS, 16, 1, 1072 ap_msg.msg, ap_msg.len, false); 1073 1074 if (perms != &ap_perms && domain < AUTOSEL_DOM) { 1075 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) { 1076 if (!test_bit_inv(domain, perms->adm)) { 1077 rc = -ENODEV; 1078 goto out_free; 1079 } 1080 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) { 1081 rc = -EOPNOTSUPP; 1082 goto out_free; 1083 } 1084 } 1085 1086 pref_zc = NULL; 1087 pref_zq = NULL; 1088 spin_lock(&zcrypt_list_lock); 1089 for_each_zcrypt_card(zc) { 1090 /* Check for usable EP11 card */ 1091 if (!zc->online || !zc->card->config || zc->card->chkstop || 1092 !zc->card->hwinfo.ep11) 1093 continue; 1094 /* Check for user selected EP11 card */ 1095 if (targets && 1096 !is_desired_ep11_card(zc->card->id, target_num, targets)) 1097 continue; 1098 /* check if request size exceeds card max msg size */ 1099 if (ap_msg.len > zc->card->maxmsgsize) 1100 continue; 1101 /* check if device node has admission for this card */ 1102 if (!zcrypt_check_card(perms, zc->card->id)) 1103 continue; 1104 /* get weight index of the card device */ 1105 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY]; 1106 /* penalty if this msg was previously sent via this card */ 1107 cpen = (tr && tr->again_counter && tr->last_qid && 1108 AP_QID_CARD(tr->last_qid) == zc->card->id) ? 1109 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; 1110 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) 1111 continue; 1112 for_each_zcrypt_queue(zq, zc) { 1113 /* check if device is usable and eligible */ 1114 if (!zq->online || !zq->ops->send_ep11_cprb || 1115 !ap_queue_usable(zq->queue) || 1116 (targets && 1117 !is_desired_ep11_queue(zq->queue->qid, 1118 target_num, targets))) 1119 continue; 1120 /* check if device node has admission for this queue */ 1121 if (!zcrypt_check_queue(perms, 1122 AP_QID_QUEUE(zq->queue->qid))) 1123 continue; 1124 /* penalty if the msg was previously sent at this qid */ 1125 qpen = (tr && tr->again_counter && tr->last_qid && 1126 tr->last_qid == zq->queue->qid) ? 1127 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; 1128 if (!zcrypt_queue_compare(zq, pref_zq, 1129 wgt + cpen + qpen, pref_wgt)) 1130 continue; 1131 pref_zc = zc; 1132 pref_zq = zq; 1133 pref_wgt = wgt + cpen + qpen; 1134 } 1135 } 1136 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 1137 spin_unlock(&zcrypt_list_lock); 1138 1139 if (!pref_zq) { 1140 if (targets && target_num == 1) { 1141 pr_debug("%s no match for address %02x.%04x => ENODEV\n", 1142 __func__, (int)targets->ap_id, 1143 (int)targets->dom_id); 1144 } else if (targets) { 1145 pr_debug("%s no match for %d target addrs => ENODEV\n", 1146 __func__, (int)target_num); 1147 } else { 1148 pr_debug("%s no match for address ff.ffff => ENODEV\n", 1149 __func__); 1150 } 1151 rc = -ENODEV; 1152 goto out_free; 1153 } 1154 1155 qid = pref_zq->queue->qid; 1156 rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg); 1157 if (!rc) { 1158 print_hex_dump_debug("ep11rpl: ", DUMP_PREFIX_ADDRESS, 16, 1, 1159 ap_msg.msg, ap_msg.len, false); 1160 } 1161 1162 spin_lock(&zcrypt_list_lock); 1163 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 1164 spin_unlock(&zcrypt_list_lock); 1165 1166out_free: 1167 kfree(targets); 1168out: 1169 ap_release_message(&ap_msg); 1170 if (tr) { 1171 tr->last_rc = rc; 1172 tr->last_qid = qid; 1173 } 1174 trace_s390_zcrypt_rep(xcrb, func_code, rc, 1175 AP_QID_CARD(qid), AP_QID_QUEUE(qid)); 1176 return rc; 1177} 1178 1179long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb) 1180{ 1181 struct zcrypt_track tr; 1182 int rc; 1183 1184 memset(&tr, 0, sizeof(tr)); 1185 1186 do { 1187 rc = _zcrypt_send_ep11_cprb(false, &ap_perms, &tr, xcrb); 1188 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1189 1190 /* on ENODEV failure: retry once again after a requested rescan */ 1191 if (rc == -ENODEV && zcrypt_process_rescan()) 1192 do { 1193 rc = _zcrypt_send_ep11_cprb(false, &ap_perms, &tr, xcrb); 1194 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1195 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1196 rc = -EIO; 1197 if (rc) 1198 pr_debug("%s rc=%d\n", __func__, rc); 1199 1200 return rc; 1201} 1202EXPORT_SYMBOL(zcrypt_send_ep11_cprb); 1203 1204static long zcrypt_rng(char *buffer) 1205{ 1206 struct zcrypt_card *zc, *pref_zc; 1207 struct zcrypt_queue *zq, *pref_zq; 1208 unsigned int wgt = 0, pref_wgt = 0; 1209 unsigned int func_code; 1210 struct ap_message ap_msg; 1211 unsigned int domain; 1212 int qid = 0, rc = -ENODEV; 1213 struct module *mod; 1214 1215 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB); 1216 1217 ap_init_message(&ap_msg); 1218 rc = prep_rng_ap_msg(&ap_msg, &func_code, &domain); 1219 if (rc) 1220 goto out; 1221 1222 pref_zc = NULL; 1223 pref_zq = NULL; 1224 spin_lock(&zcrypt_list_lock); 1225 for_each_zcrypt_card(zc) { 1226 /* Check for usable CCA card */ 1227 if (!zc->online || !zc->card->config || zc->card->chkstop || 1228 !zc->card->hwinfo.cca) 1229 continue; 1230 /* get weight index of the card device */ 1231 wgt = zc->speed_rating[func_code]; 1232 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt)) 1233 continue; 1234 for_each_zcrypt_queue(zq, zc) { 1235 /* check if device is usable and eligible */ 1236 if (!zq->online || !zq->ops->rng || 1237 !ap_queue_usable(zq->queue)) 1238 continue; 1239 if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt)) 1240 continue; 1241 pref_zc = zc; 1242 pref_zq = zq; 1243 pref_wgt = wgt; 1244 } 1245 } 1246 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 1247 spin_unlock(&zcrypt_list_lock); 1248 1249 if (!pref_zq) { 1250 pr_debug("%s no matching queue found => ENODEV\n", __func__); 1251 rc = -ENODEV; 1252 goto out; 1253 } 1254 1255 qid = pref_zq->queue->qid; 1256 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg); 1257 1258 spin_lock(&zcrypt_list_lock); 1259 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 1260 spin_unlock(&zcrypt_list_lock); 1261 1262out: 1263 ap_release_message(&ap_msg); 1264 trace_s390_zcrypt_rep(buffer, func_code, rc, 1265 AP_QID_CARD(qid), AP_QID_QUEUE(qid)); 1266 return rc; 1267} 1268 1269static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus) 1270{ 1271 struct zcrypt_card *zc; 1272 struct zcrypt_queue *zq; 1273 struct zcrypt_device_status *stat; 1274 int card, queue; 1275 1276 memset(devstatus, 0, MAX_ZDEV_ENTRIES 1277 * sizeof(struct zcrypt_device_status)); 1278 1279 spin_lock(&zcrypt_list_lock); 1280 for_each_zcrypt_card(zc) { 1281 for_each_zcrypt_queue(zq, zc) { 1282 card = AP_QID_CARD(zq->queue->qid); 1283 if (card >= MAX_ZDEV_CARDIDS) 1284 continue; 1285 queue = AP_QID_QUEUE(zq->queue->qid); 1286 stat = &devstatus[card * AP_DOMAINS + queue]; 1287 stat->hwtype = zc->card->ap_dev.device_type; 1288 stat->functions = zc->card->hwinfo.fac >> 26; 1289 stat->qid = zq->queue->qid; 1290 stat->online = zq->online ? 0x01 : 0x00; 1291 } 1292 } 1293 spin_unlock(&zcrypt_list_lock); 1294} 1295 1296void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus) 1297{ 1298 struct zcrypt_card *zc; 1299 struct zcrypt_queue *zq; 1300 struct zcrypt_device_status_ext *stat; 1301 int card, queue; 1302 1303 memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT 1304 * sizeof(struct zcrypt_device_status_ext)); 1305 1306 spin_lock(&zcrypt_list_lock); 1307 for_each_zcrypt_card(zc) { 1308 for_each_zcrypt_queue(zq, zc) { 1309 card = AP_QID_CARD(zq->queue->qid); 1310 queue = AP_QID_QUEUE(zq->queue->qid); 1311 stat = &devstatus[card * AP_DOMAINS + queue]; 1312 stat->hwtype = zc->card->ap_dev.device_type; 1313 stat->functions = zc->card->hwinfo.fac >> 26; 1314 stat->qid = zq->queue->qid; 1315 stat->online = zq->online ? 0x01 : 0x00; 1316 } 1317 } 1318 spin_unlock(&zcrypt_list_lock); 1319} 1320EXPORT_SYMBOL(zcrypt_device_status_mask_ext); 1321 1322int zcrypt_device_status_ext(int card, int queue, 1323 struct zcrypt_device_status_ext *devstat) 1324{ 1325 struct zcrypt_card *zc; 1326 struct zcrypt_queue *zq; 1327 1328 memset(devstat, 0, sizeof(*devstat)); 1329 1330 spin_lock(&zcrypt_list_lock); 1331 for_each_zcrypt_card(zc) { 1332 for_each_zcrypt_queue(zq, zc) { 1333 if (card == AP_QID_CARD(zq->queue->qid) && 1334 queue == AP_QID_QUEUE(zq->queue->qid)) { 1335 devstat->hwtype = zc->card->ap_dev.device_type; 1336 devstat->functions = zc->card->hwinfo.fac >> 26; 1337 devstat->qid = zq->queue->qid; 1338 devstat->online = zq->online ? 0x01 : 0x00; 1339 spin_unlock(&zcrypt_list_lock); 1340 return 0; 1341 } 1342 } 1343 } 1344 spin_unlock(&zcrypt_list_lock); 1345 1346 return -ENODEV; 1347} 1348EXPORT_SYMBOL(zcrypt_device_status_ext); 1349 1350static void zcrypt_status_mask(char status[], size_t max_adapters) 1351{ 1352 struct zcrypt_card *zc; 1353 struct zcrypt_queue *zq; 1354 int card; 1355 1356 memset(status, 0, max_adapters); 1357 spin_lock(&zcrypt_list_lock); 1358 for_each_zcrypt_card(zc) { 1359 for_each_zcrypt_queue(zq, zc) { 1360 card = AP_QID_CARD(zq->queue->qid); 1361 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index || 1362 card >= max_adapters) 1363 continue; 1364 status[card] = zc->online ? zc->user_space_type : 0x0d; 1365 } 1366 } 1367 spin_unlock(&zcrypt_list_lock); 1368} 1369 1370static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters) 1371{ 1372 struct zcrypt_card *zc; 1373 struct zcrypt_queue *zq; 1374 int card; 1375 1376 memset(qdepth, 0, max_adapters); 1377 spin_lock(&zcrypt_list_lock); 1378 local_bh_disable(); 1379 for_each_zcrypt_card(zc) { 1380 for_each_zcrypt_queue(zq, zc) { 1381 card = AP_QID_CARD(zq->queue->qid); 1382 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index || 1383 card >= max_adapters) 1384 continue; 1385 spin_lock(&zq->queue->lock); 1386 qdepth[card] = 1387 zq->queue->pendingq_count + 1388 zq->queue->requestq_count; 1389 spin_unlock(&zq->queue->lock); 1390 } 1391 } 1392 local_bh_enable(); 1393 spin_unlock(&zcrypt_list_lock); 1394} 1395 1396static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters) 1397{ 1398 struct zcrypt_card *zc; 1399 struct zcrypt_queue *zq; 1400 int card; 1401 u64 cnt; 1402 1403 memset(reqcnt, 0, sizeof(int) * max_adapters); 1404 spin_lock(&zcrypt_list_lock); 1405 local_bh_disable(); 1406 for_each_zcrypt_card(zc) { 1407 for_each_zcrypt_queue(zq, zc) { 1408 card = AP_QID_CARD(zq->queue->qid); 1409 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index || 1410 card >= max_adapters) 1411 continue; 1412 spin_lock(&zq->queue->lock); 1413 cnt = zq->queue->total_request_count; 1414 spin_unlock(&zq->queue->lock); 1415 reqcnt[card] = (cnt < UINT_MAX) ? (u32)cnt : UINT_MAX; 1416 } 1417 } 1418 local_bh_enable(); 1419 spin_unlock(&zcrypt_list_lock); 1420} 1421 1422static int zcrypt_pendingq_count(void) 1423{ 1424 struct zcrypt_card *zc; 1425 struct zcrypt_queue *zq; 1426 int pendingq_count; 1427 1428 pendingq_count = 0; 1429 spin_lock(&zcrypt_list_lock); 1430 local_bh_disable(); 1431 for_each_zcrypt_card(zc) { 1432 for_each_zcrypt_queue(zq, zc) { 1433 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) 1434 continue; 1435 spin_lock(&zq->queue->lock); 1436 pendingq_count += zq->queue->pendingq_count; 1437 spin_unlock(&zq->queue->lock); 1438 } 1439 } 1440 local_bh_enable(); 1441 spin_unlock(&zcrypt_list_lock); 1442 return pendingq_count; 1443} 1444 1445static int zcrypt_requestq_count(void) 1446{ 1447 struct zcrypt_card *zc; 1448 struct zcrypt_queue *zq; 1449 int requestq_count; 1450 1451 requestq_count = 0; 1452 spin_lock(&zcrypt_list_lock); 1453 local_bh_disable(); 1454 for_each_zcrypt_card(zc) { 1455 for_each_zcrypt_queue(zq, zc) { 1456 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) 1457 continue; 1458 spin_lock(&zq->queue->lock); 1459 requestq_count += zq->queue->requestq_count; 1460 spin_unlock(&zq->queue->lock); 1461 } 1462 } 1463 local_bh_enable(); 1464 spin_unlock(&zcrypt_list_lock); 1465 return requestq_count; 1466} 1467 1468static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg) 1469{ 1470 int rc; 1471 struct zcrypt_track tr; 1472 struct ica_rsa_modexpo mex; 1473 struct ica_rsa_modexpo __user *umex = (void __user *)arg; 1474 1475 memset(&tr, 0, sizeof(tr)); 1476 if (copy_from_user(&mex, umex, sizeof(mex))) 1477 return -EFAULT; 1478 1479 do { 1480 rc = zcrypt_rsa_modexpo(perms, &tr, &mex); 1481 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1482 1483 /* on ENODEV failure: retry once again after a requested rescan */ 1484 if (rc == -ENODEV && zcrypt_process_rescan()) 1485 do { 1486 rc = zcrypt_rsa_modexpo(perms, &tr, &mex); 1487 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1488 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1489 rc = -EIO; 1490 if (rc) { 1491 pr_debug("ioctl ICARSAMODEXPO rc=%d\n", rc); 1492 return rc; 1493 } 1494 return put_user(mex.outputdatalength, &umex->outputdatalength); 1495} 1496 1497static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg) 1498{ 1499 int rc; 1500 struct zcrypt_track tr; 1501 struct ica_rsa_modexpo_crt crt; 1502 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *)arg; 1503 1504 memset(&tr, 0, sizeof(tr)); 1505 if (copy_from_user(&crt, ucrt, sizeof(crt))) 1506 return -EFAULT; 1507 1508 do { 1509 rc = zcrypt_rsa_crt(perms, &tr, &crt); 1510 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1511 1512 /* on ENODEV failure: retry once again after a requested rescan */ 1513 if (rc == -ENODEV && zcrypt_process_rescan()) 1514 do { 1515 rc = zcrypt_rsa_crt(perms, &tr, &crt); 1516 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1517 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1518 rc = -EIO; 1519 if (rc) { 1520 pr_debug("ioctl ICARSACRT rc=%d\n", rc); 1521 return rc; 1522 } 1523 return put_user(crt.outputdatalength, &ucrt->outputdatalength); 1524} 1525 1526static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg) 1527{ 1528 int rc; 1529 struct ica_xcRB xcrb; 1530 struct zcrypt_track tr; 1531 struct ica_xcRB __user *uxcrb = (void __user *)arg; 1532 1533 memset(&tr, 0, sizeof(tr)); 1534 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb))) 1535 return -EFAULT; 1536 1537 do { 1538 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb); 1539 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1540 1541 /* on ENODEV failure: retry once again after a requested rescan */ 1542 if (rc == -ENODEV && zcrypt_process_rescan()) 1543 do { 1544 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb); 1545 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1546 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1547 rc = -EIO; 1548 if (rc) 1549 pr_debug("ioctl ZSENDCPRB rc=%d status=0x%x\n", 1550 rc, xcrb.status); 1551 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb))) 1552 return -EFAULT; 1553 return rc; 1554} 1555 1556static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg) 1557{ 1558 int rc; 1559 struct ep11_urb xcrb; 1560 struct zcrypt_track tr; 1561 struct ep11_urb __user *uxcrb = (void __user *)arg; 1562 1563 memset(&tr, 0, sizeof(tr)); 1564 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb))) 1565 return -EFAULT; 1566 1567 do { 1568 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb); 1569 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1570 1571 /* on ENODEV failure: retry once again after a requested rescan */ 1572 if (rc == -ENODEV && zcrypt_process_rescan()) 1573 do { 1574 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb); 1575 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1576 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1577 rc = -EIO; 1578 if (rc) 1579 pr_debug("ioctl ZSENDEP11CPRB rc=%d\n", rc); 1580 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb))) 1581 return -EFAULT; 1582 return rc; 1583} 1584 1585static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, 1586 unsigned long arg) 1587{ 1588 int rc; 1589 struct ap_perms *perms = 1590 (struct ap_perms *)filp->private_data; 1591 1592 rc = zcrypt_check_ioctl(perms, cmd); 1593 if (rc) 1594 return rc; 1595 1596 switch (cmd) { 1597 case ICARSAMODEXPO: 1598 return icarsamodexpo_ioctl(perms, arg); 1599 case ICARSACRT: 1600 return icarsacrt_ioctl(perms, arg); 1601 case ZSECSENDCPRB: 1602 return zsecsendcprb_ioctl(perms, arg); 1603 case ZSENDEP11CPRB: 1604 return zsendep11cprb_ioctl(perms, arg); 1605 case ZCRYPT_DEVICE_STATUS: { 1606 struct zcrypt_device_status_ext *device_status; 1607 size_t total_size = MAX_ZDEV_ENTRIES_EXT 1608 * sizeof(struct zcrypt_device_status_ext); 1609 1610 device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT, 1611 sizeof(struct zcrypt_device_status_ext), 1612 GFP_KERNEL); 1613 if (!device_status) 1614 return -ENOMEM; 1615 zcrypt_device_status_mask_ext(device_status); 1616 if (copy_to_user((char __user *)arg, device_status, 1617 total_size)) 1618 rc = -EFAULT; 1619 kvfree(device_status); 1620 return rc; 1621 } 1622 case ZCRYPT_STATUS_MASK: { 1623 char status[AP_DEVICES]; 1624 1625 zcrypt_status_mask(status, AP_DEVICES); 1626 if (copy_to_user((char __user *)arg, status, sizeof(status))) 1627 return -EFAULT; 1628 return 0; 1629 } 1630 case ZCRYPT_QDEPTH_MASK: { 1631 char qdepth[AP_DEVICES]; 1632 1633 zcrypt_qdepth_mask(qdepth, AP_DEVICES); 1634 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth))) 1635 return -EFAULT; 1636 return 0; 1637 } 1638 case ZCRYPT_PERDEV_REQCNT: { 1639 u32 *reqcnt; 1640 1641 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL); 1642 if (!reqcnt) 1643 return -ENOMEM; 1644 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES); 1645 if (copy_to_user((int __user *)arg, reqcnt, 1646 sizeof(u32) * AP_DEVICES)) 1647 rc = -EFAULT; 1648 kfree(reqcnt); 1649 return rc; 1650 } 1651 case Z90STAT_REQUESTQ_COUNT: 1652 return put_user(zcrypt_requestq_count(), (int __user *)arg); 1653 case Z90STAT_PENDINGQ_COUNT: 1654 return put_user(zcrypt_pendingq_count(), (int __user *)arg); 1655 case Z90STAT_TOTALOPEN_COUNT: 1656 return put_user(atomic_read(&zcrypt_open_count), 1657 (int __user *)arg); 1658 case Z90STAT_DOMAIN_INDEX: 1659 return put_user(ap_domain_index, (int __user *)arg); 1660 /* 1661 * Deprecated ioctls 1662 */ 1663 case ZDEVICESTATUS: { 1664 /* the old ioctl supports only 64 adapters */ 1665 struct zcrypt_device_status *device_status; 1666 size_t total_size = MAX_ZDEV_ENTRIES 1667 * sizeof(struct zcrypt_device_status); 1668 1669 device_status = kzalloc(total_size, GFP_KERNEL); 1670 if (!device_status) 1671 return -ENOMEM; 1672 zcrypt_device_status_mask(device_status); 1673 if (copy_to_user((char __user *)arg, device_status, 1674 total_size)) 1675 rc = -EFAULT; 1676 kfree(device_status); 1677 return rc; 1678 } 1679 case Z90STAT_STATUS_MASK: { 1680 /* the old ioctl supports only 64 adapters */ 1681 char status[MAX_ZDEV_CARDIDS]; 1682 1683 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS); 1684 if (copy_to_user((char __user *)arg, status, sizeof(status))) 1685 return -EFAULT; 1686 return 0; 1687 } 1688 case Z90STAT_QDEPTH_MASK: { 1689 /* the old ioctl supports only 64 adapters */ 1690 char qdepth[MAX_ZDEV_CARDIDS]; 1691 1692 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS); 1693 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth))) 1694 return -EFAULT; 1695 return 0; 1696 } 1697 case Z90STAT_PERDEV_REQCNT: { 1698 /* the old ioctl supports only 64 adapters */ 1699 u32 reqcnt[MAX_ZDEV_CARDIDS]; 1700 1701 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS); 1702 if (copy_to_user((int __user *)arg, reqcnt, sizeof(reqcnt))) 1703 return -EFAULT; 1704 return 0; 1705 } 1706 /* unknown ioctl number */ 1707 default: 1708 pr_debug("unknown ioctl 0x%08x\n", cmd); 1709 return -ENOIOCTLCMD; 1710 } 1711} 1712 1713#ifdef CONFIG_COMPAT 1714/* 1715 * ioctl32 conversion routines 1716 */ 1717struct compat_ica_rsa_modexpo { 1718 compat_uptr_t inputdata; 1719 unsigned int inputdatalength; 1720 compat_uptr_t outputdata; 1721 unsigned int outputdatalength; 1722 compat_uptr_t b_key; 1723 compat_uptr_t n_modulus; 1724}; 1725 1726static long trans_modexpo32(struct ap_perms *perms, struct file *filp, 1727 unsigned int cmd, unsigned long arg) 1728{ 1729 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg); 1730 struct compat_ica_rsa_modexpo mex32; 1731 struct ica_rsa_modexpo mex64; 1732 struct zcrypt_track tr; 1733 long rc; 1734 1735 memset(&tr, 0, sizeof(tr)); 1736 if (copy_from_user(&mex32, umex32, sizeof(mex32))) 1737 return -EFAULT; 1738 mex64.inputdata = compat_ptr(mex32.inputdata); 1739 mex64.inputdatalength = mex32.inputdatalength; 1740 mex64.outputdata = compat_ptr(mex32.outputdata); 1741 mex64.outputdatalength = mex32.outputdatalength; 1742 mex64.b_key = compat_ptr(mex32.b_key); 1743 mex64.n_modulus = compat_ptr(mex32.n_modulus); 1744 do { 1745 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64); 1746 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1747 1748 /* on ENODEV failure: retry once again after a requested rescan */ 1749 if (rc == -ENODEV && zcrypt_process_rescan()) 1750 do { 1751 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64); 1752 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1753 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1754 rc = -EIO; 1755 if (rc) 1756 return rc; 1757 return put_user(mex64.outputdatalength, 1758 &umex32->outputdatalength); 1759} 1760 1761struct compat_ica_rsa_modexpo_crt { 1762 compat_uptr_t inputdata; 1763 unsigned int inputdatalength; 1764 compat_uptr_t outputdata; 1765 unsigned int outputdatalength; 1766 compat_uptr_t bp_key; 1767 compat_uptr_t bq_key; 1768 compat_uptr_t np_prime; 1769 compat_uptr_t nq_prime; 1770 compat_uptr_t u_mult_inv; 1771}; 1772 1773static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp, 1774 unsigned int cmd, unsigned long arg) 1775{ 1776 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg); 1777 struct compat_ica_rsa_modexpo_crt crt32; 1778 struct ica_rsa_modexpo_crt crt64; 1779 struct zcrypt_track tr; 1780 long rc; 1781 1782 memset(&tr, 0, sizeof(tr)); 1783 if (copy_from_user(&crt32, ucrt32, sizeof(crt32))) 1784 return -EFAULT; 1785 crt64.inputdata = compat_ptr(crt32.inputdata); 1786 crt64.inputdatalength = crt32.inputdatalength; 1787 crt64.outputdata = compat_ptr(crt32.outputdata); 1788 crt64.outputdatalength = crt32.outputdatalength; 1789 crt64.bp_key = compat_ptr(crt32.bp_key); 1790 crt64.bq_key = compat_ptr(crt32.bq_key); 1791 crt64.np_prime = compat_ptr(crt32.np_prime); 1792 crt64.nq_prime = compat_ptr(crt32.nq_prime); 1793 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv); 1794 do { 1795 rc = zcrypt_rsa_crt(perms, &tr, &crt64); 1796 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1797 1798 /* on ENODEV failure: retry once again after a requested rescan */ 1799 if (rc == -ENODEV && zcrypt_process_rescan()) 1800 do { 1801 rc = zcrypt_rsa_crt(perms, &tr, &crt64); 1802 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1803 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1804 rc = -EIO; 1805 if (rc) 1806 return rc; 1807 return put_user(crt64.outputdatalength, 1808 &ucrt32->outputdatalength); 1809} 1810 1811struct compat_ica_xcrb { 1812 unsigned short agent_ID; 1813 unsigned int user_defined; 1814 unsigned short request_ID; 1815 unsigned int request_control_blk_length; 1816 unsigned char padding1[16 - sizeof(compat_uptr_t)]; 1817 compat_uptr_t request_control_blk_addr; 1818 unsigned int request_data_length; 1819 char padding2[16 - sizeof(compat_uptr_t)]; 1820 compat_uptr_t request_data_address; 1821 unsigned int reply_control_blk_length; 1822 char padding3[16 - sizeof(compat_uptr_t)]; 1823 compat_uptr_t reply_control_blk_addr; 1824 unsigned int reply_data_length; 1825 char padding4[16 - sizeof(compat_uptr_t)]; 1826 compat_uptr_t reply_data_addr; 1827 unsigned short priority_window; 1828 unsigned int status; 1829} __packed; 1830 1831static long trans_xcrb32(struct ap_perms *perms, struct file *filp, 1832 unsigned int cmd, unsigned long arg) 1833{ 1834 struct compat_ica_xcrb __user *uxcrb32 = compat_ptr(arg); 1835 struct compat_ica_xcrb xcrb32; 1836 struct zcrypt_track tr; 1837 struct ica_xcRB xcrb64; 1838 long rc; 1839 1840 memset(&tr, 0, sizeof(tr)); 1841 if (copy_from_user(&xcrb32, uxcrb32, sizeof(xcrb32))) 1842 return -EFAULT; 1843 xcrb64.agent_ID = xcrb32.agent_ID; 1844 xcrb64.user_defined = xcrb32.user_defined; 1845 xcrb64.request_ID = xcrb32.request_ID; 1846 xcrb64.request_control_blk_length = 1847 xcrb32.request_control_blk_length; 1848 xcrb64.request_control_blk_addr = 1849 compat_ptr(xcrb32.request_control_blk_addr); 1850 xcrb64.request_data_length = 1851 xcrb32.request_data_length; 1852 xcrb64.request_data_address = 1853 compat_ptr(xcrb32.request_data_address); 1854 xcrb64.reply_control_blk_length = 1855 xcrb32.reply_control_blk_length; 1856 xcrb64.reply_control_blk_addr = 1857 compat_ptr(xcrb32.reply_control_blk_addr); 1858 xcrb64.reply_data_length = xcrb32.reply_data_length; 1859 xcrb64.reply_data_addr = 1860 compat_ptr(xcrb32.reply_data_addr); 1861 xcrb64.priority_window = xcrb32.priority_window; 1862 xcrb64.status = xcrb32.status; 1863 do { 1864 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64); 1865 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1866 1867 /* on ENODEV failure: retry once again after a requested rescan */ 1868 if (rc == -ENODEV && zcrypt_process_rescan()) 1869 do { 1870 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64); 1871 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1872 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1873 rc = -EIO; 1874 xcrb32.reply_control_blk_length = xcrb64.reply_control_blk_length; 1875 xcrb32.reply_data_length = xcrb64.reply_data_length; 1876 xcrb32.status = xcrb64.status; 1877 if (copy_to_user(uxcrb32, &xcrb32, sizeof(xcrb32))) 1878 return -EFAULT; 1879 return rc; 1880} 1881 1882static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd, 1883 unsigned long arg) 1884{ 1885 int rc; 1886 struct ap_perms *perms = 1887 (struct ap_perms *)filp->private_data; 1888 1889 rc = zcrypt_check_ioctl(perms, cmd); 1890 if (rc) 1891 return rc; 1892 1893 if (cmd == ICARSAMODEXPO) 1894 return trans_modexpo32(perms, filp, cmd, arg); 1895 if (cmd == ICARSACRT) 1896 return trans_modexpo_crt32(perms, filp, cmd, arg); 1897 if (cmd == ZSECSENDCPRB) 1898 return trans_xcrb32(perms, filp, cmd, arg); 1899 return zcrypt_unlocked_ioctl(filp, cmd, arg); 1900} 1901#endif 1902 1903/* 1904 * Misc device file operations. 1905 */ 1906static const struct file_operations zcrypt_fops = { 1907 .owner = THIS_MODULE, 1908 .read = zcrypt_read, 1909 .write = zcrypt_write, 1910 .unlocked_ioctl = zcrypt_unlocked_ioctl, 1911#ifdef CONFIG_COMPAT 1912 .compat_ioctl = zcrypt_compat_ioctl, 1913#endif 1914 .open = zcrypt_open, 1915 .release = zcrypt_release, 1916 .llseek = no_llseek, 1917}; 1918 1919/* 1920 * Misc device. 1921 */ 1922static struct miscdevice zcrypt_misc_device = { 1923 .minor = MISC_DYNAMIC_MINOR, 1924 .name = "z90crypt", 1925 .fops = &zcrypt_fops, 1926}; 1927 1928static int zcrypt_rng_device_count; 1929static u32 *zcrypt_rng_buffer; 1930static int zcrypt_rng_buffer_index; 1931static DEFINE_MUTEX(zcrypt_rng_mutex); 1932 1933static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data) 1934{ 1935 int rc; 1936 1937 /* 1938 * We don't need locking here because the RNG API guarantees serialized 1939 * read method calls. 1940 */ 1941 if (zcrypt_rng_buffer_index == 0) { 1942 rc = zcrypt_rng((char *)zcrypt_rng_buffer); 1943 /* on ENODEV failure: retry once again after an AP bus rescan */ 1944 if (rc == -ENODEV && zcrypt_process_rescan()) 1945 rc = zcrypt_rng((char *)zcrypt_rng_buffer); 1946 if (rc < 0) 1947 return -EIO; 1948 zcrypt_rng_buffer_index = rc / sizeof(*data); 1949 } 1950 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index]; 1951 return sizeof(*data); 1952} 1953 1954static struct hwrng zcrypt_rng_dev = { 1955 .name = "zcrypt", 1956 .data_read = zcrypt_rng_data_read, 1957 .quality = 990, 1958}; 1959 1960int zcrypt_rng_device_add(void) 1961{ 1962 int rc = 0; 1963 1964 mutex_lock(&zcrypt_rng_mutex); 1965 if (zcrypt_rng_device_count == 0) { 1966 zcrypt_rng_buffer = (u32 *)get_zeroed_page(GFP_KERNEL); 1967 if (!zcrypt_rng_buffer) { 1968 rc = -ENOMEM; 1969 goto out; 1970 } 1971 zcrypt_rng_buffer_index = 0; 1972 rc = hwrng_register(&zcrypt_rng_dev); 1973 if (rc) 1974 goto out_free; 1975 zcrypt_rng_device_count = 1; 1976 } else { 1977 zcrypt_rng_device_count++; 1978 } 1979 mutex_unlock(&zcrypt_rng_mutex); 1980 return 0; 1981 1982out_free: 1983 free_page((unsigned long)zcrypt_rng_buffer); 1984out: 1985 mutex_unlock(&zcrypt_rng_mutex); 1986 return rc; 1987} 1988 1989void zcrypt_rng_device_remove(void) 1990{ 1991 mutex_lock(&zcrypt_rng_mutex); 1992 zcrypt_rng_device_count--; 1993 if (zcrypt_rng_device_count == 0) { 1994 hwrng_unregister(&zcrypt_rng_dev); 1995 free_page((unsigned long)zcrypt_rng_buffer); 1996 } 1997 mutex_unlock(&zcrypt_rng_mutex); 1998} 1999 2000/* 2001 * Wait until the zcrypt api is operational. 2002 * The AP bus scan and the binding of ap devices to device drivers is 2003 * an asynchronous job. This function waits until these initial jobs 2004 * are done and so the zcrypt api should be ready to serve crypto 2005 * requests - if there are resources available. The function uses an 2006 * internal timeout of 30s. The very first caller will either wait for 2007 * ap bus bindings complete or the timeout happens. This state will be 2008 * remembered for further callers which will only be blocked until a 2009 * decision is made (timeout or bindings complete). 2010 * On timeout -ETIME is returned, on success the return value is 0. 2011 */ 2012int zcrypt_wait_api_operational(void) 2013{ 2014 static DEFINE_MUTEX(zcrypt_wait_api_lock); 2015 static int zcrypt_wait_api_state; 2016 int rc; 2017 2018 rc = mutex_lock_interruptible(&zcrypt_wait_api_lock); 2019 if (rc) 2020 return rc; 2021 2022 switch (zcrypt_wait_api_state) { 2023 case 0: 2024 /* initial state, invoke wait for the ap bus complete */ 2025 rc = ap_wait_apqn_bindings_complete( 2026 msecs_to_jiffies(ZCRYPT_WAIT_BINDINGS_COMPLETE_MS)); 2027 switch (rc) { 2028 case 0: 2029 /* ap bus bindings are complete */ 2030 zcrypt_wait_api_state = 1; 2031 break; 2032 case -EINTR: 2033 /* interrupted, go back to caller */ 2034 break; 2035 case -ETIME: 2036 /* timeout */ 2037 ZCRYPT_DBF_WARN("%s ap_wait_init_apqn_bindings_complete()=ETIME\n", 2038 __func__); 2039 zcrypt_wait_api_state = -ETIME; 2040 break; 2041 default: 2042 /* other failure */ 2043 pr_debug("%s ap_wait_init_apqn_bindings_complete()=%d\n", 2044 __func__, rc); 2045 break; 2046 } 2047 break; 2048 case 1: 2049 /* a previous caller already found ap bus bindings complete */ 2050 rc = 0; 2051 break; 2052 default: 2053 /* a previous caller had timeout or other failure */ 2054 rc = zcrypt_wait_api_state; 2055 break; 2056 } 2057 2058 mutex_unlock(&zcrypt_wait_api_lock); 2059 2060 return rc; 2061} 2062EXPORT_SYMBOL(zcrypt_wait_api_operational); 2063 2064int __init zcrypt_debug_init(void) 2065{ 2066 zcrypt_dbf_info = debug_register("zcrypt", 2, 1, 2067 ZCRYPT_DBF_MAX_SPRINTF_ARGS * sizeof(long)); 2068 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view); 2069 debug_set_level(zcrypt_dbf_info, DBF_ERR); 2070 2071 return 0; 2072} 2073 2074void zcrypt_debug_exit(void) 2075{ 2076 debug_unregister(zcrypt_dbf_info); 2077} 2078 2079static int __init zcdn_init(void) 2080{ 2081 int rc; 2082 2083 /* create a new class 'zcrypt' */ 2084 rc = class_register(&zcrypt_class); 2085 if (rc) 2086 goto out_class_register_failed; 2087 2088 /* alloc device minor range */ 2089 rc = alloc_chrdev_region(&zcrypt_devt, 2090 0, ZCRYPT_MAX_MINOR_NODES, 2091 ZCRYPT_NAME); 2092 if (rc) 2093 goto out_alloc_chrdev_failed; 2094 2095 cdev_init(&zcrypt_cdev, &zcrypt_fops); 2096 zcrypt_cdev.owner = THIS_MODULE; 2097 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES); 2098 if (rc) 2099 goto out_cdev_add_failed; 2100 2101 /* need some class specific sysfs attributes */ 2102 rc = class_create_file(&zcrypt_class, &class_attr_zcdn_create); 2103 if (rc) 2104 goto out_class_create_file_1_failed; 2105 rc = class_create_file(&zcrypt_class, &class_attr_zcdn_destroy); 2106 if (rc) 2107 goto out_class_create_file_2_failed; 2108 2109 return 0; 2110 2111out_class_create_file_2_failed: 2112 class_remove_file(&zcrypt_class, &class_attr_zcdn_create); 2113out_class_create_file_1_failed: 2114 cdev_del(&zcrypt_cdev); 2115out_cdev_add_failed: 2116 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES); 2117out_alloc_chrdev_failed: 2118 class_unregister(&zcrypt_class); 2119out_class_register_failed: 2120 return rc; 2121} 2122 2123static void zcdn_exit(void) 2124{ 2125 class_remove_file(&zcrypt_class, &class_attr_zcdn_create); 2126 class_remove_file(&zcrypt_class, &class_attr_zcdn_destroy); 2127 zcdn_destroy_all(); 2128 cdev_del(&zcrypt_cdev); 2129 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES); 2130 class_unregister(&zcrypt_class); 2131} 2132 2133/* 2134 * zcrypt_api_init(): Module initialization. 2135 * 2136 * The module initialization code. 2137 */ 2138int __init zcrypt_api_init(void) 2139{ 2140 int rc; 2141 2142 rc = zcrypt_debug_init(); 2143 if (rc) 2144 goto out; 2145 2146 rc = zcdn_init(); 2147 if (rc) 2148 goto out; 2149 2150 /* Register the request sprayer. */ 2151 rc = misc_register(&zcrypt_misc_device); 2152 if (rc < 0) 2153 goto out_misc_register_failed; 2154 2155 zcrypt_msgtype6_init(); 2156 zcrypt_msgtype50_init(); 2157 2158 return 0; 2159 2160out_misc_register_failed: 2161 zcdn_exit(); 2162 zcrypt_debug_exit(); 2163out: 2164 return rc; 2165} 2166 2167/* 2168 * zcrypt_api_exit(): Module termination. 2169 * 2170 * The module termination code. 2171 */ 2172void __exit zcrypt_api_exit(void) 2173{ 2174 zcdn_exit(); 2175 misc_deregister(&zcrypt_misc_device); 2176 zcrypt_msgtype6_exit(); 2177 zcrypt_msgtype50_exit(); 2178 zcrypt_ccamisc_exit(); 2179 zcrypt_ep11misc_exit(); 2180 zcrypt_debug_exit(); 2181} 2182 2183module_init(zcrypt_api_init); 2184module_exit(zcrypt_api_exit); 2185