1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright IBM Corp. 2001, 2018 4 * Author(s): Robert Burroughs 5 * Eric Rossman (edrossma@us.ibm.com) 6 * Cornelia Huck <cornelia.huck@de.ibm.com> 7 * 8 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com) 9 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com> 10 * Ralph Wuerthner <rwuerthn@de.ibm.com> 11 * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com> 12 * Multiple device nodes: Harald Freudenberger <freude@linux.ibm.com> 13 */ 14 15 #include <linux/module.h> 16 #include <linux/init.h> 17 #include <linux/interrupt.h> 18 #include <linux/miscdevice.h> 19 #include <linux/fs.h> 20 #include <linux/compat.h> 21 #include <linux/slab.h> 22 #include <linux/atomic.h> 23 #include <linux/uaccess.h> 24 #include <linux/hw_random.h> 25 #include <linux/debugfs.h> 26 #include <linux/cdev.h> 27 #include <linux/ctype.h> 28 #include <linux/capability.h> 29 #include <asm/debug.h> 30 31 #define CREATE_TRACE_POINTS 32 #include <asm/trace/zcrypt.h> 33 34 #include "zcrypt_api.h" 35 #include "zcrypt_debug.h" 36 37 #include "zcrypt_msgtype6.h" 38 #include "zcrypt_msgtype50.h" 39 #include "zcrypt_ccamisc.h" 40 #include "zcrypt_ep11misc.h" 41 42 /* 43 * Module description. 44 */ 45 MODULE_AUTHOR("IBM Corporation"); 46 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \ 47 "Copyright IBM Corp. 2001, 2012"); 48 MODULE_LICENSE("GPL"); 49 50 /* 51 * zcrypt tracepoint functions 52 */ 53 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req); 54 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep); 55 56 static int zcrypt_hwrng_seed = 1; 57 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440); 58 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on)."); 59 60 DEFINE_SPINLOCK(zcrypt_list_lock); 61 LIST_HEAD(zcrypt_card_list); 62 63 static atomic_t zcrypt_open_count = ATOMIC_INIT(0); 64 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0); 65 66 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0); 67 EXPORT_SYMBOL(zcrypt_rescan_req); 68 69 static LIST_HEAD(zcrypt_ops_list); 70 71 /* Zcrypt related debug feature stuff. */ 72 debug_info_t *zcrypt_dbf_info; 73 74 /* 75 * Process a rescan of the transport layer. 76 * 77 * Returns 1, if the rescan has been processed, otherwise 0. 78 */ 79 static inline int zcrypt_process_rescan(void) 80 { 81 if (atomic_read(&zcrypt_rescan_req)) { 82 atomic_set(&zcrypt_rescan_req, 0); 83 atomic_inc(&zcrypt_rescan_count); 84 ap_bus_force_rescan(); 85 ZCRYPT_DBF_INFO("%s rescan count=%07d\n", __func__, 86 atomic_inc_return(&zcrypt_rescan_count)); 87 return 1; 88 } 89 return 0; 90 } 91 92 void zcrypt_msgtype_register(struct zcrypt_ops *zops) 93 { 94 list_add_tail(&zops->list, &zcrypt_ops_list); 95 } 96 97 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops) 98 { 99 list_del_init(&zops->list); 100 } 101 102 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant) 103 { 104 struct zcrypt_ops *zops; 105 106 list_for_each_entry(zops, &zcrypt_ops_list, list) 107 if ((zops->variant == variant) && 108 (!strncmp(zops->name, name, sizeof(zops->name)))) 109 return zops; 110 return NULL; 111 } 112 EXPORT_SYMBOL(zcrypt_msgtype); 113 114 /* 115 * Multi device nodes extension functions. 116 */ 117 118 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES 119 120 struct zcdn_device; 121 122 static struct class *zcrypt_class; 123 static dev_t zcrypt_devt; 124 static struct cdev zcrypt_cdev; 125 126 struct zcdn_device { 127 struct device device; 128 struct ap_perms perms; 129 }; 130 131 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device) 132 133 #define ZCDN_MAX_NAME 32 134 135 static int zcdn_create(const char *name); 136 static int zcdn_destroy(const char *name); 137 138 /* 139 * Find zcdn device by name. 140 * Returns reference to the zcdn device which needs to be released 141 * with put_device() after use. 142 */ 143 static inline struct zcdn_device *find_zcdndev_by_name(const char *name) 144 { 145 struct device *dev = class_find_device_by_name(zcrypt_class, name); 146 147 return dev ? to_zcdn_dev(dev) : NULL; 148 } 149 150 /* 151 * Find zcdn device by devt value. 152 * Returns reference to the zcdn device which needs to be released 153 * with put_device() after use. 154 */ 155 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt) 156 { 157 struct device *dev = class_find_device_by_devt(zcrypt_class, devt); 158 159 return dev ? to_zcdn_dev(dev) : NULL; 160 } 161 162 static ssize_t ioctlmask_show(struct device *dev, 163 struct device_attribute *attr, 164 char *buf) 165 { 166 int i, rc; 167 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 168 169 if (mutex_lock_interruptible(&ap_perms_mutex)) 170 return -ERESTARTSYS; 171 172 buf[0] = '0'; 173 buf[1] = 'x'; 174 for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++) 175 snprintf(buf + 2 + 2 * i * sizeof(long), 176 PAGE_SIZE - 2 - 2 * i * sizeof(long), 177 "%016lx", zcdndev->perms.ioctlm[i]); 178 buf[2 + 2 * i * sizeof(long)] = '\n'; 179 buf[2 + 2 * i * sizeof(long) + 1] = '\0'; 180 rc = 2 + 2 * i * sizeof(long) + 1; 181 182 mutex_unlock(&ap_perms_mutex); 183 184 return rc; 185 } 186 187 static ssize_t ioctlmask_store(struct device *dev, 188 struct device_attribute *attr, 189 const char *buf, size_t count) 190 { 191 int rc; 192 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 193 194 rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm, 195 AP_IOCTLS, &ap_perms_mutex); 196 if (rc) 197 return rc; 198 199 return count; 200 } 201 202 static DEVICE_ATTR_RW(ioctlmask); 203 204 static ssize_t apmask_show(struct device *dev, 205 struct device_attribute *attr, 206 char *buf) 207 { 208 int i, rc; 209 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 210 211 if (mutex_lock_interruptible(&ap_perms_mutex)) 212 return -ERESTARTSYS; 213 214 buf[0] = '0'; 215 buf[1] = 'x'; 216 for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++) 217 snprintf(buf + 2 + 2 * i * sizeof(long), 218 PAGE_SIZE - 2 - 2 * i * sizeof(long), 219 "%016lx", zcdndev->perms.apm[i]); 220 buf[2 + 2 * i * sizeof(long)] = '\n'; 221 buf[2 + 2 * i * sizeof(long) + 1] = '\0'; 222 rc = 2 + 2 * i * sizeof(long) + 1; 223 224 mutex_unlock(&ap_perms_mutex); 225 226 return rc; 227 } 228 229 static ssize_t apmask_store(struct device *dev, 230 struct device_attribute *attr, 231 const char *buf, size_t count) 232 { 233 int rc; 234 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 235 236 rc = ap_parse_mask_str(buf, zcdndev->perms.apm, 237 AP_DEVICES, &ap_perms_mutex); 238 if (rc) 239 return rc; 240 241 return count; 242 } 243 244 static DEVICE_ATTR_RW(apmask); 245 246 static ssize_t aqmask_show(struct device *dev, 247 struct device_attribute *attr, 248 char *buf) 249 { 250 int i, rc; 251 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 252 253 if (mutex_lock_interruptible(&ap_perms_mutex)) 254 return -ERESTARTSYS; 255 256 buf[0] = '0'; 257 buf[1] = 'x'; 258 for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++) 259 snprintf(buf + 2 + 2 * i * sizeof(long), 260 PAGE_SIZE - 2 - 2 * i * sizeof(long), 261 "%016lx", zcdndev->perms.aqm[i]); 262 buf[2 + 2 * i * sizeof(long)] = '\n'; 263 buf[2 + 2 * i * sizeof(long) + 1] = '\0'; 264 rc = 2 + 2 * i * sizeof(long) + 1; 265 266 mutex_unlock(&ap_perms_mutex); 267 268 return rc; 269 } 270 271 static ssize_t aqmask_store(struct device *dev, 272 struct device_attribute *attr, 273 const char *buf, size_t count) 274 { 275 int rc; 276 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 277 278 rc = ap_parse_mask_str(buf, zcdndev->perms.aqm, 279 AP_DOMAINS, &ap_perms_mutex); 280 if (rc) 281 return rc; 282 283 return count; 284 } 285 286 static DEVICE_ATTR_RW(aqmask); 287 288 static struct attribute *zcdn_dev_attrs[] = { 289 &dev_attr_ioctlmask.attr, 290 &dev_attr_apmask.attr, 291 &dev_attr_aqmask.attr, 292 NULL 293 }; 294 295 static struct attribute_group zcdn_dev_attr_group = { 296 .attrs = zcdn_dev_attrs 297 }; 298 299 static const struct attribute_group *zcdn_dev_attr_groups[] = { 300 &zcdn_dev_attr_group, 301 NULL 302 }; 303 304 static ssize_t zcdn_create_store(struct class *class, 305 struct class_attribute *attr, 306 const char *buf, size_t count) 307 { 308 int rc; 309 char name[ZCDN_MAX_NAME]; 310 311 strncpy(name, skip_spaces(buf), sizeof(name)); 312 name[sizeof(name) - 1] = '\0'; 313 314 rc = zcdn_create(strim(name)); 315 316 return rc ? rc : count; 317 } 318 319 static const struct class_attribute class_attr_zcdn_create = 320 __ATTR(create, 0600, NULL, zcdn_create_store); 321 322 static ssize_t zcdn_destroy_store(struct class *class, 323 struct class_attribute *attr, 324 const char *buf, size_t count) 325 { 326 int rc; 327 char name[ZCDN_MAX_NAME]; 328 329 strncpy(name, skip_spaces(buf), sizeof(name)); 330 name[sizeof(name) - 1] = '\0'; 331 332 rc = zcdn_destroy(strim(name)); 333 334 return rc ? rc : count; 335 } 336 337 static const struct class_attribute class_attr_zcdn_destroy = 338 __ATTR(destroy, 0600, NULL, zcdn_destroy_store); 339 340 static void zcdn_device_release(struct device *dev) 341 { 342 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 343 344 ZCRYPT_DBF_INFO("%s releasing zcdn device %d:%d\n", 345 __func__, MAJOR(dev->devt), MINOR(dev->devt)); 346 347 kfree(zcdndev); 348 } 349 350 static int zcdn_create(const char *name) 351 { 352 dev_t devt; 353 int i, rc = 0; 354 char nodename[ZCDN_MAX_NAME]; 355 struct zcdn_device *zcdndev; 356 357 if (mutex_lock_interruptible(&ap_perms_mutex)) 358 return -ERESTARTSYS; 359 360 /* check if device node with this name already exists */ 361 if (name[0]) { 362 zcdndev = find_zcdndev_by_name(name); 363 if (zcdndev) { 364 put_device(&zcdndev->device); 365 rc = -EEXIST; 366 goto unlockout; 367 } 368 } 369 370 /* find an unused minor number */ 371 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) { 372 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i); 373 zcdndev = find_zcdndev_by_devt(devt); 374 if (zcdndev) 375 put_device(&zcdndev->device); 376 else 377 break; 378 } 379 if (i == ZCRYPT_MAX_MINOR_NODES) { 380 rc = -ENOSPC; 381 goto unlockout; 382 } 383 384 /* alloc and prepare a new zcdn device */ 385 zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL); 386 if (!zcdndev) { 387 rc = -ENOMEM; 388 goto unlockout; 389 } 390 zcdndev->device.release = zcdn_device_release; 391 zcdndev->device.class = zcrypt_class; 392 zcdndev->device.devt = devt; 393 zcdndev->device.groups = zcdn_dev_attr_groups; 394 if (name[0]) 395 strncpy(nodename, name, sizeof(nodename)); 396 else 397 snprintf(nodename, sizeof(nodename), 398 ZCRYPT_NAME "_%d", (int) MINOR(devt)); 399 nodename[sizeof(nodename)-1] = '\0'; 400 if (dev_set_name(&zcdndev->device, nodename)) { 401 rc = -EINVAL; 402 goto unlockout; 403 } 404 rc = device_register(&zcdndev->device); 405 if (rc) { 406 put_device(&zcdndev->device); 407 goto unlockout; 408 } 409 410 ZCRYPT_DBF_INFO("%s created zcdn device %d:%d\n", 411 __func__, MAJOR(devt), MINOR(devt)); 412 413 unlockout: 414 mutex_unlock(&ap_perms_mutex); 415 return rc; 416 } 417 418 static int zcdn_destroy(const char *name) 419 { 420 int rc = 0; 421 struct zcdn_device *zcdndev; 422 423 if (mutex_lock_interruptible(&ap_perms_mutex)) 424 return -ERESTARTSYS; 425 426 /* try to find this zcdn device */ 427 zcdndev = find_zcdndev_by_name(name); 428 if (!zcdndev) { 429 rc = -ENOENT; 430 goto unlockout; 431 } 432 433 /* 434 * The zcdn device is not hard destroyed. It is subject to 435 * reference counting and thus just needs to be unregistered. 436 */ 437 put_device(&zcdndev->device); 438 device_unregister(&zcdndev->device); 439 440 unlockout: 441 mutex_unlock(&ap_perms_mutex); 442 return rc; 443 } 444 445 static void zcdn_destroy_all(void) 446 { 447 int i; 448 dev_t devt; 449 struct zcdn_device *zcdndev; 450 451 mutex_lock(&ap_perms_mutex); 452 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) { 453 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i); 454 zcdndev = find_zcdndev_by_devt(devt); 455 if (zcdndev) { 456 put_device(&zcdndev->device); 457 device_unregister(&zcdndev->device); 458 } 459 } 460 mutex_unlock(&ap_perms_mutex); 461 } 462 463 #endif 464 465 /* 466 * zcrypt_read (): Not supported beyond zcrypt 1.3.1. 467 * 468 * This function is not supported beyond zcrypt 1.3.1. 469 */ 470 static ssize_t zcrypt_read(struct file *filp, char __user *buf, 471 size_t count, loff_t *f_pos) 472 { 473 return -EPERM; 474 } 475 476 /* 477 * zcrypt_write(): Not allowed. 478 * 479 * Write is is not allowed 480 */ 481 static ssize_t zcrypt_write(struct file *filp, const char __user *buf, 482 size_t count, loff_t *f_pos) 483 { 484 return -EPERM; 485 } 486 487 /* 488 * zcrypt_open(): Count number of users. 489 * 490 * Device open function to count number of users. 491 */ 492 static int zcrypt_open(struct inode *inode, struct file *filp) 493 { 494 struct ap_perms *perms = &ap_perms; 495 496 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES 497 if (filp->f_inode->i_cdev == &zcrypt_cdev) { 498 struct zcdn_device *zcdndev; 499 500 if (mutex_lock_interruptible(&ap_perms_mutex)) 501 return -ERESTARTSYS; 502 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev); 503 /* find returns a reference, no get_device() needed */ 504 mutex_unlock(&ap_perms_mutex); 505 if (zcdndev) 506 perms = &zcdndev->perms; 507 } 508 #endif 509 filp->private_data = (void *) perms; 510 511 atomic_inc(&zcrypt_open_count); 512 return stream_open(inode, filp); 513 } 514 515 /* 516 * zcrypt_release(): Count number of users. 517 * 518 * Device close function to count number of users. 519 */ 520 static int zcrypt_release(struct inode *inode, struct file *filp) 521 { 522 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES 523 if (filp->f_inode->i_cdev == &zcrypt_cdev) { 524 struct zcdn_device *zcdndev; 525 526 mutex_lock(&ap_perms_mutex); 527 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev); 528 mutex_unlock(&ap_perms_mutex); 529 if (zcdndev) { 530 /* 2 puts here: one for find, one for open */ 531 put_device(&zcdndev->device); 532 put_device(&zcdndev->device); 533 } 534 } 535 #endif 536 537 atomic_dec(&zcrypt_open_count); 538 return 0; 539 } 540 541 static inline int zcrypt_check_ioctl(struct ap_perms *perms, 542 unsigned int cmd) 543 { 544 int rc = -EPERM; 545 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT; 546 547 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) { 548 if (test_bit_inv(ioctlnr, perms->ioctlm)) 549 rc = 0; 550 } 551 552 if (rc) 553 ZCRYPT_DBF_WARN("%s ioctl check failed: ioctlnr=0x%04x rc=%d\n", 554 __func__, ioctlnr, rc); 555 556 return rc; 557 } 558 559 static inline bool zcrypt_check_card(struct ap_perms *perms, int card) 560 { 561 return test_bit_inv(card, perms->apm) ? true : false; 562 } 563 564 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue) 565 { 566 return test_bit_inv(queue, perms->aqm) ? true : false; 567 } 568 569 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc, 570 struct zcrypt_queue *zq, 571 struct module **pmod, 572 unsigned int weight) 573 { 574 if (!zq || !try_module_get(zq->queue->ap_dev.device.driver->owner)) 575 return NULL; 576 zcrypt_queue_get(zq); 577 get_device(&zq->queue->ap_dev.device); 578 atomic_add(weight, &zc->load); 579 atomic_add(weight, &zq->load); 580 zq->request_count++; 581 *pmod = zq->queue->ap_dev.device.driver->owner; 582 return zq; 583 } 584 585 static inline void zcrypt_drop_queue(struct zcrypt_card *zc, 586 struct zcrypt_queue *zq, 587 struct module *mod, 588 unsigned int weight) 589 { 590 zq->request_count--; 591 atomic_sub(weight, &zc->load); 592 atomic_sub(weight, &zq->load); 593 put_device(&zq->queue->ap_dev.device); 594 zcrypt_queue_put(zq); 595 module_put(mod); 596 } 597 598 static inline bool zcrypt_card_compare(struct zcrypt_card *zc, 599 struct zcrypt_card *pref_zc, 600 unsigned int weight, 601 unsigned int pref_weight) 602 { 603 if (!pref_zc) 604 return true; 605 weight += atomic_read(&zc->load); 606 pref_weight += atomic_read(&pref_zc->load); 607 if (weight == pref_weight) 608 return atomic64_read(&zc->card->total_request_count) < 609 atomic64_read(&pref_zc->card->total_request_count); 610 return weight < pref_weight; 611 } 612 613 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq, 614 struct zcrypt_queue *pref_zq, 615 unsigned int weight, 616 unsigned int pref_weight) 617 { 618 if (!pref_zq) 619 return true; 620 weight += atomic_read(&zq->load); 621 pref_weight += atomic_read(&pref_zq->load); 622 if (weight == pref_weight) 623 return zq->queue->total_request_count < 624 pref_zq->queue->total_request_count; 625 return weight < pref_weight; 626 } 627 628 /* 629 * zcrypt ioctls. 630 */ 631 static long zcrypt_rsa_modexpo(struct ap_perms *perms, 632 struct zcrypt_track *tr, 633 struct ica_rsa_modexpo *mex) 634 { 635 struct zcrypt_card *zc, *pref_zc; 636 struct zcrypt_queue *zq, *pref_zq; 637 struct ap_message ap_msg; 638 unsigned int wgt = 0, pref_wgt = 0; 639 unsigned int func_code; 640 int cpen, qpen, qid = 0, rc = -ENODEV; 641 struct module *mod; 642 643 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO); 644 645 ap_init_message(&ap_msg); 646 647 #ifdef CONFIG_ZCRYPT_DEBUG 648 if (tr && tr->fi.cmd) 649 ap_msg.fi.cmd = tr->fi.cmd; 650 #endif 651 652 if (mex->outputdatalength < mex->inputdatalength) { 653 func_code = 0; 654 rc = -EINVAL; 655 goto out; 656 } 657 658 /* 659 * As long as outputdatalength is big enough, we can set the 660 * outputdatalength equal to the inputdatalength, since that is the 661 * number of bytes we will copy in any case 662 */ 663 mex->outputdatalength = mex->inputdatalength; 664 665 rc = get_rsa_modex_fc(mex, &func_code); 666 if (rc) 667 goto out; 668 669 pref_zc = NULL; 670 pref_zq = NULL; 671 spin_lock(&zcrypt_list_lock); 672 for_each_zcrypt_card(zc) { 673 /* Check for useable accelarator or CCA card */ 674 if (!zc->online || !zc->card->config || 675 !(zc->card->functions & 0x18000000)) 676 continue; 677 /* Check for size limits */ 678 if (zc->min_mod_size > mex->inputdatalength || 679 zc->max_mod_size < mex->inputdatalength) 680 continue; 681 /* check if device node has admission for this card */ 682 if (!zcrypt_check_card(perms, zc->card->id)) 683 continue; 684 /* get weight index of the card device */ 685 wgt = zc->speed_rating[func_code]; 686 /* penalty if this msg was previously sent via this card */ 687 cpen = (tr && tr->again_counter && tr->last_qid && 688 AP_QID_CARD(tr->last_qid) == zc->card->id) ? 689 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; 690 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) 691 continue; 692 for_each_zcrypt_queue(zq, zc) { 693 /* check if device is useable and eligible */ 694 if (!zq->online || !zq->ops->rsa_modexpo || 695 !zq->queue->config) 696 continue; 697 /* check if device node has admission for this queue */ 698 if (!zcrypt_check_queue(perms, 699 AP_QID_QUEUE(zq->queue->qid))) 700 continue; 701 /* penalty if the msg was previously sent at this qid */ 702 qpen = (tr && tr->again_counter && tr->last_qid && 703 tr->last_qid == zq->queue->qid) ? 704 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; 705 if (!zcrypt_queue_compare(zq, pref_zq, 706 wgt + cpen + qpen, pref_wgt)) 707 continue; 708 pref_zc = zc; 709 pref_zq = zq; 710 pref_wgt = wgt + cpen + qpen; 711 } 712 } 713 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 714 spin_unlock(&zcrypt_list_lock); 715 716 if (!pref_zq) { 717 rc = -ENODEV; 718 goto out; 719 } 720 721 qid = pref_zq->queue->qid; 722 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg); 723 724 spin_lock(&zcrypt_list_lock); 725 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 726 spin_unlock(&zcrypt_list_lock); 727 728 out: 729 ap_release_message(&ap_msg); 730 if (tr) { 731 tr->last_rc = rc; 732 tr->last_qid = qid; 733 } 734 trace_s390_zcrypt_rep(mex, func_code, rc, 735 AP_QID_CARD(qid), AP_QID_QUEUE(qid)); 736 return rc; 737 } 738 739 static long zcrypt_rsa_crt(struct ap_perms *perms, 740 struct zcrypt_track *tr, 741 struct ica_rsa_modexpo_crt *crt) 742 { 743 struct zcrypt_card *zc, *pref_zc; 744 struct zcrypt_queue *zq, *pref_zq; 745 struct ap_message ap_msg; 746 unsigned int wgt = 0, pref_wgt = 0; 747 unsigned int func_code; 748 int cpen, qpen, qid = 0, rc = -ENODEV; 749 struct module *mod; 750 751 trace_s390_zcrypt_req(crt, TP_ICARSACRT); 752 753 ap_init_message(&ap_msg); 754 755 #ifdef CONFIG_ZCRYPT_DEBUG 756 if (tr && tr->fi.cmd) 757 ap_msg.fi.cmd = tr->fi.cmd; 758 #endif 759 760 if (crt->outputdatalength < crt->inputdatalength) { 761 func_code = 0; 762 rc = -EINVAL; 763 goto out; 764 } 765 766 /* 767 * As long as outputdatalength is big enough, we can set the 768 * outputdatalength equal to the inputdatalength, since that is the 769 * number of bytes we will copy in any case 770 */ 771 crt->outputdatalength = crt->inputdatalength; 772 773 rc = get_rsa_crt_fc(crt, &func_code); 774 if (rc) 775 goto out; 776 777 pref_zc = NULL; 778 pref_zq = NULL; 779 spin_lock(&zcrypt_list_lock); 780 for_each_zcrypt_card(zc) { 781 /* Check for useable accelarator or CCA card */ 782 if (!zc->online || !zc->card->config || 783 !(zc->card->functions & 0x18000000)) 784 continue; 785 /* Check for size limits */ 786 if (zc->min_mod_size > crt->inputdatalength || 787 zc->max_mod_size < crt->inputdatalength) 788 continue; 789 /* check if device node has admission for this card */ 790 if (!zcrypt_check_card(perms, zc->card->id)) 791 continue; 792 /* get weight index of the card device */ 793 wgt = zc->speed_rating[func_code]; 794 /* penalty if this msg was previously sent via this card */ 795 cpen = (tr && tr->again_counter && tr->last_qid && 796 AP_QID_CARD(tr->last_qid) == zc->card->id) ? 797 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; 798 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) 799 continue; 800 for_each_zcrypt_queue(zq, zc) { 801 /* check if device is useable and eligible */ 802 if (!zq->online || !zq->ops->rsa_modexpo_crt || 803 !zq->queue->config) 804 continue; 805 /* check if device node has admission for this queue */ 806 if (!zcrypt_check_queue(perms, 807 AP_QID_QUEUE(zq->queue->qid))) 808 continue; 809 /* penalty if the msg was previously sent at this qid */ 810 qpen = (tr && tr->again_counter && tr->last_qid && 811 tr->last_qid == zq->queue->qid) ? 812 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; 813 if (!zcrypt_queue_compare(zq, pref_zq, 814 wgt + cpen + qpen, pref_wgt)) 815 continue; 816 pref_zc = zc; 817 pref_zq = zq; 818 pref_wgt = wgt + cpen + qpen; 819 } 820 } 821 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 822 spin_unlock(&zcrypt_list_lock); 823 824 if (!pref_zq) { 825 rc = -ENODEV; 826 goto out; 827 } 828 829 qid = pref_zq->queue->qid; 830 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg); 831 832 spin_lock(&zcrypt_list_lock); 833 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 834 spin_unlock(&zcrypt_list_lock); 835 836 out: 837 ap_release_message(&ap_msg); 838 if (tr) { 839 tr->last_rc = rc; 840 tr->last_qid = qid; 841 } 842 trace_s390_zcrypt_rep(crt, func_code, rc, 843 AP_QID_CARD(qid), AP_QID_QUEUE(qid)); 844 return rc; 845 } 846 847 static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms, 848 struct zcrypt_track *tr, 849 struct ica_xcRB *xcRB) 850 { 851 struct zcrypt_card *zc, *pref_zc; 852 struct zcrypt_queue *zq, *pref_zq; 853 struct ap_message ap_msg; 854 unsigned int wgt = 0, pref_wgt = 0; 855 unsigned int func_code; 856 unsigned short *domain, tdom; 857 int cpen, qpen, qid = 0, rc = -ENODEV; 858 struct module *mod; 859 860 trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB); 861 862 xcRB->status = 0; 863 ap_init_message(&ap_msg); 864 865 #ifdef CONFIG_ZCRYPT_DEBUG 866 if (tr && tr->fi.cmd) 867 ap_msg.fi.cmd = tr->fi.cmd; 868 if (tr && tr->fi.action == AP_FI_ACTION_CCA_AGENT_FF) { 869 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid agent_ID 'FF'\n", 870 __func__, tr->fi.cmd); 871 xcRB->agent_ID = 0x4646; 872 } 873 #endif 874 875 rc = get_cprb_fc(userspace, xcRB, &ap_msg, &func_code, &domain); 876 if (rc) 877 goto out; 878 879 /* 880 * If a valid target domain is set and this domain is NOT a usage 881 * domain but a control only domain, autoselect target domain. 882 */ 883 tdom = *domain; 884 if (tdom < AP_DOMAINS && 885 !ap_test_config_usage_domain(tdom) && 886 ap_test_config_ctrl_domain(tdom)) 887 tdom = AUTOSEL_DOM; 888 889 pref_zc = NULL; 890 pref_zq = NULL; 891 spin_lock(&zcrypt_list_lock); 892 for_each_zcrypt_card(zc) { 893 /* Check for useable CCA card */ 894 if (!zc->online || !zc->card->config || 895 !(zc->card->functions & 0x10000000)) 896 continue; 897 /* Check for user selected CCA card */ 898 if (xcRB->user_defined != AUTOSELECT && 899 xcRB->user_defined != zc->card->id) 900 continue; 901 /* check if request size exceeds card max msg size */ 902 if (ap_msg.len > zc->card->maxmsgsize) 903 continue; 904 /* check if device node has admission for this card */ 905 if (!zcrypt_check_card(perms, zc->card->id)) 906 continue; 907 /* get weight index of the card device */ 908 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY]; 909 /* penalty if this msg was previously sent via this card */ 910 cpen = (tr && tr->again_counter && tr->last_qid && 911 AP_QID_CARD(tr->last_qid) == zc->card->id) ? 912 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; 913 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) 914 continue; 915 for_each_zcrypt_queue(zq, zc) { 916 /* check for device useable and eligible */ 917 if (!zq->online || 918 !zq->ops->send_cprb || 919 !zq->queue->config || 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 rc = -ENODEV; 944 goto out; 945 } 946 947 /* in case of auto select, provide the correct domain */ 948 qid = pref_zq->queue->qid; 949 if (*domain == AUTOSEL_DOM) 950 *domain = AP_QID_QUEUE(qid); 951 952 #ifdef CONFIG_ZCRYPT_DEBUG 953 if (tr && tr->fi.action == AP_FI_ACTION_CCA_DOM_INVAL) { 954 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid domain\n", 955 __func__, tr->fi.cmd); 956 *domain = 99; 957 } 958 #endif 959 960 rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcRB, &ap_msg); 961 962 spin_lock(&zcrypt_list_lock); 963 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 964 spin_unlock(&zcrypt_list_lock); 965 966 out: 967 ap_release_message(&ap_msg); 968 if (tr) { 969 tr->last_rc = rc; 970 tr->last_qid = qid; 971 } 972 trace_s390_zcrypt_rep(xcRB, func_code, rc, 973 AP_QID_CARD(qid), AP_QID_QUEUE(qid)); 974 return rc; 975 } 976 977 long zcrypt_send_cprb(struct ica_xcRB *xcRB) 978 { 979 return _zcrypt_send_cprb(false, &ap_perms, NULL, xcRB); 980 } 981 EXPORT_SYMBOL(zcrypt_send_cprb); 982 983 static bool is_desired_ep11_card(unsigned int dev_id, 984 unsigned short target_num, 985 struct ep11_target_dev *targets) 986 { 987 while (target_num-- > 0) { 988 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP) 989 return true; 990 targets++; 991 } 992 return false; 993 } 994 995 static bool is_desired_ep11_queue(unsigned int dev_qid, 996 unsigned short target_num, 997 struct ep11_target_dev *targets) 998 { 999 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid); 1000 1001 while (target_num-- > 0) { 1002 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) && 1003 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM)) 1004 return true; 1005 targets++; 1006 } 1007 return false; 1008 } 1009 1010 static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms, 1011 struct zcrypt_track *tr, 1012 struct ep11_urb *xcrb) 1013 { 1014 struct zcrypt_card *zc, *pref_zc; 1015 struct zcrypt_queue *zq, *pref_zq; 1016 struct ep11_target_dev *targets; 1017 unsigned short target_num; 1018 unsigned int wgt = 0, pref_wgt = 0; 1019 unsigned int func_code; 1020 struct ap_message ap_msg; 1021 int cpen, qpen, qid = 0, rc = -ENODEV; 1022 struct module *mod; 1023 1024 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB); 1025 1026 ap_init_message(&ap_msg); 1027 1028 #ifdef CONFIG_ZCRYPT_DEBUG 1029 if (tr && tr->fi.cmd) 1030 ap_msg.fi.cmd = tr->fi.cmd; 1031 #endif 1032 1033 target_num = (unsigned short) xcrb->targets_num; 1034 1035 /* empty list indicates autoselect (all available targets) */ 1036 targets = NULL; 1037 if (target_num != 0) { 1038 struct ep11_target_dev __user *uptr; 1039 1040 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL); 1041 if (!targets) { 1042 func_code = 0; 1043 rc = -ENOMEM; 1044 goto out; 1045 } 1046 1047 uptr = (struct ep11_target_dev __force __user *) xcrb->targets; 1048 if (z_copy_from_user(userspace, targets, uptr, 1049 target_num * sizeof(*targets))) { 1050 func_code = 0; 1051 rc = -EFAULT; 1052 goto out_free; 1053 } 1054 } 1055 1056 rc = get_ep11cprb_fc(userspace, xcrb, &ap_msg, &func_code); 1057 if (rc) 1058 goto out_free; 1059 1060 pref_zc = NULL; 1061 pref_zq = NULL; 1062 spin_lock(&zcrypt_list_lock); 1063 for_each_zcrypt_card(zc) { 1064 /* Check for useable EP11 card */ 1065 if (!zc->online || !zc->card->config || 1066 !(zc->card->functions & 0x04000000)) 1067 continue; 1068 /* Check for user selected EP11 card */ 1069 if (targets && 1070 !is_desired_ep11_card(zc->card->id, target_num, targets)) 1071 continue; 1072 /* check if request size exceeds card max msg size */ 1073 if (ap_msg.len > zc->card->maxmsgsize) 1074 continue; 1075 /* check if device node has admission for this card */ 1076 if (!zcrypt_check_card(perms, zc->card->id)) 1077 continue; 1078 /* get weight index of the card device */ 1079 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY]; 1080 /* penalty if this msg was previously sent via this card */ 1081 cpen = (tr && tr->again_counter && tr->last_qid && 1082 AP_QID_CARD(tr->last_qid) == zc->card->id) ? 1083 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; 1084 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) 1085 continue; 1086 for_each_zcrypt_queue(zq, zc) { 1087 /* check if device is useable and eligible */ 1088 if (!zq->online || 1089 !zq->ops->send_ep11_cprb || 1090 !zq->queue->config || 1091 (targets && 1092 !is_desired_ep11_queue(zq->queue->qid, 1093 target_num, targets))) 1094 continue; 1095 /* check if device node has admission for this queue */ 1096 if (!zcrypt_check_queue(perms, 1097 AP_QID_QUEUE(zq->queue->qid))) 1098 continue; 1099 /* penalty if the msg was previously sent at this qid */ 1100 qpen = (tr && tr->again_counter && tr->last_qid && 1101 tr->last_qid == zq->queue->qid) ? 1102 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; 1103 if (!zcrypt_queue_compare(zq, pref_zq, 1104 wgt + cpen + qpen, pref_wgt)) 1105 continue; 1106 pref_zc = zc; 1107 pref_zq = zq; 1108 pref_wgt = wgt + cpen + qpen; 1109 } 1110 } 1111 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 1112 spin_unlock(&zcrypt_list_lock); 1113 1114 if (!pref_zq) { 1115 rc = -ENODEV; 1116 goto out_free; 1117 } 1118 1119 qid = pref_zq->queue->qid; 1120 rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg); 1121 1122 spin_lock(&zcrypt_list_lock); 1123 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 1124 spin_unlock(&zcrypt_list_lock); 1125 1126 out_free: 1127 kfree(targets); 1128 out: 1129 ap_release_message(&ap_msg); 1130 if (tr) { 1131 tr->last_rc = rc; 1132 tr->last_qid = qid; 1133 } 1134 trace_s390_zcrypt_rep(xcrb, func_code, rc, 1135 AP_QID_CARD(qid), AP_QID_QUEUE(qid)); 1136 return rc; 1137 } 1138 1139 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb) 1140 { 1141 return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb); 1142 } 1143 EXPORT_SYMBOL(zcrypt_send_ep11_cprb); 1144 1145 static long zcrypt_rng(char *buffer) 1146 { 1147 struct zcrypt_card *zc, *pref_zc; 1148 struct zcrypt_queue *zq, *pref_zq; 1149 unsigned int wgt = 0, pref_wgt = 0; 1150 unsigned int func_code; 1151 struct ap_message ap_msg; 1152 unsigned int domain; 1153 int qid = 0, rc = -ENODEV; 1154 struct module *mod; 1155 1156 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB); 1157 1158 ap_init_message(&ap_msg); 1159 rc = get_rng_fc(&ap_msg, &func_code, &domain); 1160 if (rc) 1161 goto out; 1162 1163 pref_zc = NULL; 1164 pref_zq = NULL; 1165 spin_lock(&zcrypt_list_lock); 1166 for_each_zcrypt_card(zc) { 1167 /* Check for useable CCA card */ 1168 if (!zc->online || !zc->card->config || 1169 !(zc->card->functions & 0x10000000)) 1170 continue; 1171 /* get weight index of the card device */ 1172 wgt = zc->speed_rating[func_code]; 1173 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt)) 1174 continue; 1175 for_each_zcrypt_queue(zq, zc) { 1176 /* check if device is useable and eligible */ 1177 if (!zq->online || !zq->ops->rng || 1178 !zq->queue->config) 1179 continue; 1180 if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt)) 1181 continue; 1182 pref_zc = zc; 1183 pref_zq = zq; 1184 pref_wgt = wgt; 1185 } 1186 } 1187 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 1188 spin_unlock(&zcrypt_list_lock); 1189 1190 if (!pref_zq) { 1191 rc = -ENODEV; 1192 goto out; 1193 } 1194 1195 qid = pref_zq->queue->qid; 1196 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg); 1197 1198 spin_lock(&zcrypt_list_lock); 1199 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 1200 spin_unlock(&zcrypt_list_lock); 1201 1202 out: 1203 ap_release_message(&ap_msg); 1204 trace_s390_zcrypt_rep(buffer, func_code, rc, 1205 AP_QID_CARD(qid), AP_QID_QUEUE(qid)); 1206 return rc; 1207 } 1208 1209 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus) 1210 { 1211 struct zcrypt_card *zc; 1212 struct zcrypt_queue *zq; 1213 struct zcrypt_device_status *stat; 1214 int card, queue; 1215 1216 memset(devstatus, 0, MAX_ZDEV_ENTRIES 1217 * sizeof(struct zcrypt_device_status)); 1218 1219 spin_lock(&zcrypt_list_lock); 1220 for_each_zcrypt_card(zc) { 1221 for_each_zcrypt_queue(zq, zc) { 1222 card = AP_QID_CARD(zq->queue->qid); 1223 if (card >= MAX_ZDEV_CARDIDS) 1224 continue; 1225 queue = AP_QID_QUEUE(zq->queue->qid); 1226 stat = &devstatus[card * AP_DOMAINS + queue]; 1227 stat->hwtype = zc->card->ap_dev.device_type; 1228 stat->functions = zc->card->functions >> 26; 1229 stat->qid = zq->queue->qid; 1230 stat->online = zq->online ? 0x01 : 0x00; 1231 } 1232 } 1233 spin_unlock(&zcrypt_list_lock); 1234 } 1235 1236 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus) 1237 { 1238 struct zcrypt_card *zc; 1239 struct zcrypt_queue *zq; 1240 struct zcrypt_device_status_ext *stat; 1241 int card, queue; 1242 1243 memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT 1244 * sizeof(struct zcrypt_device_status_ext)); 1245 1246 spin_lock(&zcrypt_list_lock); 1247 for_each_zcrypt_card(zc) { 1248 for_each_zcrypt_queue(zq, zc) { 1249 card = AP_QID_CARD(zq->queue->qid); 1250 queue = AP_QID_QUEUE(zq->queue->qid); 1251 stat = &devstatus[card * AP_DOMAINS + queue]; 1252 stat->hwtype = zc->card->ap_dev.device_type; 1253 stat->functions = zc->card->functions >> 26; 1254 stat->qid = zq->queue->qid; 1255 stat->online = zq->online ? 0x01 : 0x00; 1256 } 1257 } 1258 spin_unlock(&zcrypt_list_lock); 1259 } 1260 EXPORT_SYMBOL(zcrypt_device_status_mask_ext); 1261 1262 int zcrypt_device_status_ext(int card, int queue, 1263 struct zcrypt_device_status_ext *devstat) 1264 { 1265 struct zcrypt_card *zc; 1266 struct zcrypt_queue *zq; 1267 1268 memset(devstat, 0, sizeof(*devstat)); 1269 1270 spin_lock(&zcrypt_list_lock); 1271 for_each_zcrypt_card(zc) { 1272 for_each_zcrypt_queue(zq, zc) { 1273 if (card == AP_QID_CARD(zq->queue->qid) && 1274 queue == AP_QID_QUEUE(zq->queue->qid)) { 1275 devstat->hwtype = zc->card->ap_dev.device_type; 1276 devstat->functions = zc->card->functions >> 26; 1277 devstat->qid = zq->queue->qid; 1278 devstat->online = zq->online ? 0x01 : 0x00; 1279 spin_unlock(&zcrypt_list_lock); 1280 return 0; 1281 } 1282 } 1283 } 1284 spin_unlock(&zcrypt_list_lock); 1285 1286 return -ENODEV; 1287 } 1288 EXPORT_SYMBOL(zcrypt_device_status_ext); 1289 1290 static void zcrypt_status_mask(char status[], size_t max_adapters) 1291 { 1292 struct zcrypt_card *zc; 1293 struct zcrypt_queue *zq; 1294 int card; 1295 1296 memset(status, 0, max_adapters); 1297 spin_lock(&zcrypt_list_lock); 1298 for_each_zcrypt_card(zc) { 1299 for_each_zcrypt_queue(zq, zc) { 1300 card = AP_QID_CARD(zq->queue->qid); 1301 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index 1302 || card >= max_adapters) 1303 continue; 1304 status[card] = zc->online ? zc->user_space_type : 0x0d; 1305 } 1306 } 1307 spin_unlock(&zcrypt_list_lock); 1308 } 1309 1310 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters) 1311 { 1312 struct zcrypt_card *zc; 1313 struct zcrypt_queue *zq; 1314 int card; 1315 1316 memset(qdepth, 0, max_adapters); 1317 spin_lock(&zcrypt_list_lock); 1318 local_bh_disable(); 1319 for_each_zcrypt_card(zc) { 1320 for_each_zcrypt_queue(zq, zc) { 1321 card = AP_QID_CARD(zq->queue->qid); 1322 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index 1323 || card >= max_adapters) 1324 continue; 1325 spin_lock(&zq->queue->lock); 1326 qdepth[card] = 1327 zq->queue->pendingq_count + 1328 zq->queue->requestq_count; 1329 spin_unlock(&zq->queue->lock); 1330 } 1331 } 1332 local_bh_enable(); 1333 spin_unlock(&zcrypt_list_lock); 1334 } 1335 1336 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters) 1337 { 1338 struct zcrypt_card *zc; 1339 struct zcrypt_queue *zq; 1340 int card; 1341 u64 cnt; 1342 1343 memset(reqcnt, 0, sizeof(int) * max_adapters); 1344 spin_lock(&zcrypt_list_lock); 1345 local_bh_disable(); 1346 for_each_zcrypt_card(zc) { 1347 for_each_zcrypt_queue(zq, zc) { 1348 card = AP_QID_CARD(zq->queue->qid); 1349 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index 1350 || card >= max_adapters) 1351 continue; 1352 spin_lock(&zq->queue->lock); 1353 cnt = zq->queue->total_request_count; 1354 spin_unlock(&zq->queue->lock); 1355 reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX; 1356 } 1357 } 1358 local_bh_enable(); 1359 spin_unlock(&zcrypt_list_lock); 1360 } 1361 1362 static int zcrypt_pendingq_count(void) 1363 { 1364 struct zcrypt_card *zc; 1365 struct zcrypt_queue *zq; 1366 int pendingq_count; 1367 1368 pendingq_count = 0; 1369 spin_lock(&zcrypt_list_lock); 1370 local_bh_disable(); 1371 for_each_zcrypt_card(zc) { 1372 for_each_zcrypt_queue(zq, zc) { 1373 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) 1374 continue; 1375 spin_lock(&zq->queue->lock); 1376 pendingq_count += zq->queue->pendingq_count; 1377 spin_unlock(&zq->queue->lock); 1378 } 1379 } 1380 local_bh_enable(); 1381 spin_unlock(&zcrypt_list_lock); 1382 return pendingq_count; 1383 } 1384 1385 static int zcrypt_requestq_count(void) 1386 { 1387 struct zcrypt_card *zc; 1388 struct zcrypt_queue *zq; 1389 int requestq_count; 1390 1391 requestq_count = 0; 1392 spin_lock(&zcrypt_list_lock); 1393 local_bh_disable(); 1394 for_each_zcrypt_card(zc) { 1395 for_each_zcrypt_queue(zq, zc) { 1396 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) 1397 continue; 1398 spin_lock(&zq->queue->lock); 1399 requestq_count += zq->queue->requestq_count; 1400 spin_unlock(&zq->queue->lock); 1401 } 1402 } 1403 local_bh_enable(); 1404 spin_unlock(&zcrypt_list_lock); 1405 return requestq_count; 1406 } 1407 1408 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg) 1409 { 1410 int rc; 1411 struct zcrypt_track tr; 1412 struct ica_rsa_modexpo mex; 1413 struct ica_rsa_modexpo __user *umex = (void __user *) arg; 1414 1415 memset(&tr, 0, sizeof(tr)); 1416 if (copy_from_user(&mex, umex, sizeof(mex))) 1417 return -EFAULT; 1418 1419 #ifdef CONFIG_ZCRYPT_DEBUG 1420 if (mex.inputdatalength & (1U << 31)) { 1421 if (!capable(CAP_SYS_ADMIN)) 1422 return -EPERM; 1423 tr.fi.cmd = (u16)(mex.inputdatalength >> 16); 1424 } 1425 mex.inputdatalength &= 0x0000FFFF; 1426 #endif 1427 1428 do { 1429 rc = zcrypt_rsa_modexpo(perms, &tr, &mex); 1430 if (rc == -EAGAIN) 1431 tr.again_counter++; 1432 #ifdef CONFIG_ZCRYPT_DEBUG 1433 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY)) 1434 break; 1435 #endif 1436 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1437 /* on failure: retry once again after a requested rescan */ 1438 if ((rc == -ENODEV) && (zcrypt_process_rescan())) 1439 do { 1440 rc = zcrypt_rsa_modexpo(perms, &tr, &mex); 1441 if (rc == -EAGAIN) 1442 tr.again_counter++; 1443 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1444 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1445 rc = -EIO; 1446 if (rc) { 1447 ZCRYPT_DBF_DBG("ioctl ICARSAMODEXPO rc=%d\n", rc); 1448 return rc; 1449 } 1450 return put_user(mex.outputdatalength, &umex->outputdatalength); 1451 } 1452 1453 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg) 1454 { 1455 int rc; 1456 struct zcrypt_track tr; 1457 struct ica_rsa_modexpo_crt crt; 1458 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg; 1459 1460 memset(&tr, 0, sizeof(tr)); 1461 if (copy_from_user(&crt, ucrt, sizeof(crt))) 1462 return -EFAULT; 1463 1464 #ifdef CONFIG_ZCRYPT_DEBUG 1465 if (crt.inputdatalength & (1U << 31)) { 1466 if (!capable(CAP_SYS_ADMIN)) 1467 return -EPERM; 1468 tr.fi.cmd = (u16)(crt.inputdatalength >> 16); 1469 } 1470 crt.inputdatalength &= 0x0000FFFF; 1471 #endif 1472 1473 do { 1474 rc = zcrypt_rsa_crt(perms, &tr, &crt); 1475 if (rc == -EAGAIN) 1476 tr.again_counter++; 1477 #ifdef CONFIG_ZCRYPT_DEBUG 1478 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY)) 1479 break; 1480 #endif 1481 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1482 /* on failure: retry once again after a requested rescan */ 1483 if ((rc == -ENODEV) && (zcrypt_process_rescan())) 1484 do { 1485 rc = zcrypt_rsa_crt(perms, &tr, &crt); 1486 if (rc == -EAGAIN) 1487 tr.again_counter++; 1488 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1489 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1490 rc = -EIO; 1491 if (rc) { 1492 ZCRYPT_DBF_DBG("ioctl ICARSACRT rc=%d\n", rc); 1493 return rc; 1494 } 1495 return put_user(crt.outputdatalength, &ucrt->outputdatalength); 1496 } 1497 1498 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg) 1499 { 1500 int rc; 1501 struct ica_xcRB xcRB; 1502 struct zcrypt_track tr; 1503 struct ica_xcRB __user *uxcRB = (void __user *) arg; 1504 1505 memset(&tr, 0, sizeof(tr)); 1506 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB))) 1507 return -EFAULT; 1508 1509 #ifdef CONFIG_ZCRYPT_DEBUG 1510 if ((xcRB.status & 0x8000FFFF) == 0x80004649 /* 'FI' */) { 1511 if (!capable(CAP_SYS_ADMIN)) 1512 return -EPERM; 1513 tr.fi.cmd = (u16)(xcRB.status >> 16); 1514 } 1515 xcRB.status = 0; 1516 #endif 1517 1518 do { 1519 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB); 1520 if (rc == -EAGAIN) 1521 tr.again_counter++; 1522 #ifdef CONFIG_ZCRYPT_DEBUG 1523 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY)) 1524 break; 1525 #endif 1526 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1527 /* on failure: retry once again after a requested rescan */ 1528 if ((rc == -ENODEV) && (zcrypt_process_rescan())) 1529 do { 1530 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB); 1531 if (rc == -EAGAIN) 1532 tr.again_counter++; 1533 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1534 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1535 rc = -EIO; 1536 if (rc) 1537 ZCRYPT_DBF_DBG("ioctl ZSENDCPRB rc=%d status=0x%x\n", 1538 rc, xcRB.status); 1539 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB))) 1540 return -EFAULT; 1541 return rc; 1542 } 1543 1544 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg) 1545 { 1546 int rc; 1547 struct ep11_urb xcrb; 1548 struct zcrypt_track tr; 1549 struct ep11_urb __user *uxcrb = (void __user *)arg; 1550 1551 memset(&tr, 0, sizeof(tr)); 1552 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb))) 1553 return -EFAULT; 1554 1555 #ifdef CONFIG_ZCRYPT_DEBUG 1556 if (xcrb.req_len & (1ULL << 63)) { 1557 if (!capable(CAP_SYS_ADMIN)) 1558 return -EPERM; 1559 tr.fi.cmd = (u16)(xcrb.req_len >> 48); 1560 } 1561 xcrb.req_len &= 0x0000FFFFFFFFFFFFULL; 1562 #endif 1563 1564 do { 1565 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb); 1566 if (rc == -EAGAIN) 1567 tr.again_counter++; 1568 #ifdef CONFIG_ZCRYPT_DEBUG 1569 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY)) 1570 break; 1571 #endif 1572 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1573 /* on failure: retry once again after a requested rescan */ 1574 if ((rc == -ENODEV) && (zcrypt_process_rescan())) 1575 do { 1576 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb); 1577 if (rc == -EAGAIN) 1578 tr.again_counter++; 1579 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1580 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1581 rc = -EIO; 1582 if (rc) 1583 ZCRYPT_DBF_DBG("ioctl ZSENDEP11CPRB rc=%d\n", rc); 1584 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb))) 1585 return -EFAULT; 1586 return rc; 1587 } 1588 1589 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, 1590 unsigned long arg) 1591 { 1592 int rc; 1593 struct ap_perms *perms = 1594 (struct ap_perms *) filp->private_data; 1595 1596 rc = zcrypt_check_ioctl(perms, cmd); 1597 if (rc) 1598 return rc; 1599 1600 switch (cmd) { 1601 case ICARSAMODEXPO: 1602 return icarsamodexpo_ioctl(perms, arg); 1603 case ICARSACRT: 1604 return icarsacrt_ioctl(perms, arg); 1605 case ZSECSENDCPRB: 1606 return zsecsendcprb_ioctl(perms, arg); 1607 case ZSENDEP11CPRB: 1608 return zsendep11cprb_ioctl(perms, arg); 1609 case ZCRYPT_DEVICE_STATUS: { 1610 struct zcrypt_device_status_ext *device_status; 1611 size_t total_size = MAX_ZDEV_ENTRIES_EXT 1612 * sizeof(struct zcrypt_device_status_ext); 1613 1614 device_status = kzalloc(total_size, GFP_KERNEL); 1615 if (!device_status) 1616 return -ENOMEM; 1617 zcrypt_device_status_mask_ext(device_status); 1618 if (copy_to_user((char __user *) arg, device_status, 1619 total_size)) 1620 rc = -EFAULT; 1621 kfree(device_status); 1622 return rc; 1623 } 1624 case ZCRYPT_STATUS_MASK: { 1625 char status[AP_DEVICES]; 1626 1627 zcrypt_status_mask(status, AP_DEVICES); 1628 if (copy_to_user((char __user *) arg, status, sizeof(status))) 1629 return -EFAULT; 1630 return 0; 1631 } 1632 case ZCRYPT_QDEPTH_MASK: { 1633 char qdepth[AP_DEVICES]; 1634 1635 zcrypt_qdepth_mask(qdepth, AP_DEVICES); 1636 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth))) 1637 return -EFAULT; 1638 return 0; 1639 } 1640 case ZCRYPT_PERDEV_REQCNT: { 1641 u32 *reqcnt; 1642 1643 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL); 1644 if (!reqcnt) 1645 return -ENOMEM; 1646 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES); 1647 if (copy_to_user((int __user *) arg, reqcnt, 1648 sizeof(u32) * AP_DEVICES)) 1649 rc = -EFAULT; 1650 kfree(reqcnt); 1651 return rc; 1652 } 1653 case Z90STAT_REQUESTQ_COUNT: 1654 return put_user(zcrypt_requestq_count(), (int __user *) arg); 1655 case Z90STAT_PENDINGQ_COUNT: 1656 return put_user(zcrypt_pendingq_count(), (int __user *) arg); 1657 case Z90STAT_TOTALOPEN_COUNT: 1658 return put_user(atomic_read(&zcrypt_open_count), 1659 (int __user *) arg); 1660 case Z90STAT_DOMAIN_INDEX: 1661 return put_user(ap_domain_index, (int __user *) arg); 1662 /* 1663 * Deprecated ioctls 1664 */ 1665 case ZDEVICESTATUS: { 1666 /* the old ioctl supports only 64 adapters */ 1667 struct zcrypt_device_status *device_status; 1668 size_t total_size = MAX_ZDEV_ENTRIES 1669 * sizeof(struct zcrypt_device_status); 1670 1671 device_status = kzalloc(total_size, GFP_KERNEL); 1672 if (!device_status) 1673 return -ENOMEM; 1674 zcrypt_device_status_mask(device_status); 1675 if (copy_to_user((char __user *) arg, device_status, 1676 total_size)) 1677 rc = -EFAULT; 1678 kfree(device_status); 1679 return rc; 1680 } 1681 case Z90STAT_STATUS_MASK: { 1682 /* the old ioctl supports only 64 adapters */ 1683 char status[MAX_ZDEV_CARDIDS]; 1684 1685 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS); 1686 if (copy_to_user((char __user *) arg, status, sizeof(status))) 1687 return -EFAULT; 1688 return 0; 1689 } 1690 case Z90STAT_QDEPTH_MASK: { 1691 /* the old ioctl supports only 64 adapters */ 1692 char qdepth[MAX_ZDEV_CARDIDS]; 1693 1694 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS); 1695 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth))) 1696 return -EFAULT; 1697 return 0; 1698 } 1699 case Z90STAT_PERDEV_REQCNT: { 1700 /* the old ioctl supports only 64 adapters */ 1701 u32 reqcnt[MAX_ZDEV_CARDIDS]; 1702 1703 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS); 1704 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt))) 1705 return -EFAULT; 1706 return 0; 1707 } 1708 /* unknown ioctl number */ 1709 default: 1710 ZCRYPT_DBF_DBG("unknown ioctl 0x%08x\n", cmd); 1711 return -ENOIOCTLCMD; 1712 } 1713 } 1714 1715 #ifdef CONFIG_COMPAT 1716 /* 1717 * ioctl32 conversion routines 1718 */ 1719 struct compat_ica_rsa_modexpo { 1720 compat_uptr_t inputdata; 1721 unsigned int inputdatalength; 1722 compat_uptr_t outputdata; 1723 unsigned int outputdatalength; 1724 compat_uptr_t b_key; 1725 compat_uptr_t n_modulus; 1726 }; 1727 1728 static long trans_modexpo32(struct ap_perms *perms, struct file *filp, 1729 unsigned int cmd, unsigned long arg) 1730 { 1731 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg); 1732 struct compat_ica_rsa_modexpo mex32; 1733 struct ica_rsa_modexpo mex64; 1734 struct zcrypt_track tr; 1735 long rc; 1736 1737 memset(&tr, 0, sizeof(tr)); 1738 if (copy_from_user(&mex32, umex32, sizeof(mex32))) 1739 return -EFAULT; 1740 mex64.inputdata = compat_ptr(mex32.inputdata); 1741 mex64.inputdatalength = mex32.inputdatalength; 1742 mex64.outputdata = compat_ptr(mex32.outputdata); 1743 mex64.outputdatalength = mex32.outputdatalength; 1744 mex64.b_key = compat_ptr(mex32.b_key); 1745 mex64.n_modulus = compat_ptr(mex32.n_modulus); 1746 do { 1747 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64); 1748 if (rc == -EAGAIN) 1749 tr.again_counter++; 1750 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1751 /* on failure: retry once again after a requested rescan */ 1752 if ((rc == -ENODEV) && (zcrypt_process_rescan())) 1753 do { 1754 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64); 1755 if (rc == -EAGAIN) 1756 tr.again_counter++; 1757 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1758 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1759 rc = -EIO; 1760 if (rc) 1761 return rc; 1762 return put_user(mex64.outputdatalength, 1763 &umex32->outputdatalength); 1764 } 1765 1766 struct compat_ica_rsa_modexpo_crt { 1767 compat_uptr_t inputdata; 1768 unsigned int inputdatalength; 1769 compat_uptr_t outputdata; 1770 unsigned int outputdatalength; 1771 compat_uptr_t bp_key; 1772 compat_uptr_t bq_key; 1773 compat_uptr_t np_prime; 1774 compat_uptr_t nq_prime; 1775 compat_uptr_t u_mult_inv; 1776 }; 1777 1778 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp, 1779 unsigned int cmd, unsigned long arg) 1780 { 1781 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg); 1782 struct compat_ica_rsa_modexpo_crt crt32; 1783 struct ica_rsa_modexpo_crt crt64; 1784 struct zcrypt_track tr; 1785 long rc; 1786 1787 memset(&tr, 0, sizeof(tr)); 1788 if (copy_from_user(&crt32, ucrt32, sizeof(crt32))) 1789 return -EFAULT; 1790 crt64.inputdata = compat_ptr(crt32.inputdata); 1791 crt64.inputdatalength = crt32.inputdatalength; 1792 crt64.outputdata = compat_ptr(crt32.outputdata); 1793 crt64.outputdatalength = crt32.outputdatalength; 1794 crt64.bp_key = compat_ptr(crt32.bp_key); 1795 crt64.bq_key = compat_ptr(crt32.bq_key); 1796 crt64.np_prime = compat_ptr(crt32.np_prime); 1797 crt64.nq_prime = compat_ptr(crt32.nq_prime); 1798 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv); 1799 do { 1800 rc = zcrypt_rsa_crt(perms, &tr, &crt64); 1801 if (rc == -EAGAIN) 1802 tr.again_counter++; 1803 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1804 /* on failure: retry once again after a requested rescan */ 1805 if ((rc == -ENODEV) && (zcrypt_process_rescan())) 1806 do { 1807 rc = zcrypt_rsa_crt(perms, &tr, &crt64); 1808 if (rc == -EAGAIN) 1809 tr.again_counter++; 1810 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1811 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1812 rc = -EIO; 1813 if (rc) 1814 return rc; 1815 return put_user(crt64.outputdatalength, 1816 &ucrt32->outputdatalength); 1817 } 1818 1819 struct compat_ica_xcRB { 1820 unsigned short agent_ID; 1821 unsigned int user_defined; 1822 unsigned short request_ID; 1823 unsigned int request_control_blk_length; 1824 unsigned char padding1[16 - sizeof(compat_uptr_t)]; 1825 compat_uptr_t request_control_blk_addr; 1826 unsigned int request_data_length; 1827 char padding2[16 - sizeof(compat_uptr_t)]; 1828 compat_uptr_t request_data_address; 1829 unsigned int reply_control_blk_length; 1830 char padding3[16 - sizeof(compat_uptr_t)]; 1831 compat_uptr_t reply_control_blk_addr; 1832 unsigned int reply_data_length; 1833 char padding4[16 - sizeof(compat_uptr_t)]; 1834 compat_uptr_t reply_data_addr; 1835 unsigned short priority_window; 1836 unsigned int status; 1837 } __packed; 1838 1839 static long trans_xcRB32(struct ap_perms *perms, struct file *filp, 1840 unsigned int cmd, unsigned long arg) 1841 { 1842 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg); 1843 struct compat_ica_xcRB xcRB32; 1844 struct zcrypt_track tr; 1845 struct ica_xcRB xcRB64; 1846 long rc; 1847 1848 memset(&tr, 0, sizeof(tr)); 1849 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32))) 1850 return -EFAULT; 1851 xcRB64.agent_ID = xcRB32.agent_ID; 1852 xcRB64.user_defined = xcRB32.user_defined; 1853 xcRB64.request_ID = xcRB32.request_ID; 1854 xcRB64.request_control_blk_length = 1855 xcRB32.request_control_blk_length; 1856 xcRB64.request_control_blk_addr = 1857 compat_ptr(xcRB32.request_control_blk_addr); 1858 xcRB64.request_data_length = 1859 xcRB32.request_data_length; 1860 xcRB64.request_data_address = 1861 compat_ptr(xcRB32.request_data_address); 1862 xcRB64.reply_control_blk_length = 1863 xcRB32.reply_control_blk_length; 1864 xcRB64.reply_control_blk_addr = 1865 compat_ptr(xcRB32.reply_control_blk_addr); 1866 xcRB64.reply_data_length = xcRB32.reply_data_length; 1867 xcRB64.reply_data_addr = 1868 compat_ptr(xcRB32.reply_data_addr); 1869 xcRB64.priority_window = xcRB32.priority_window; 1870 xcRB64.status = xcRB32.status; 1871 do { 1872 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64); 1873 if (rc == -EAGAIN) 1874 tr.again_counter++; 1875 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1876 /* on failure: retry once again after a requested rescan */ 1877 if ((rc == -ENODEV) && (zcrypt_process_rescan())) 1878 do { 1879 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64); 1880 if (rc == -EAGAIN) 1881 tr.again_counter++; 1882 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX); 1883 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1884 rc = -EIO; 1885 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length; 1886 xcRB32.reply_data_length = xcRB64.reply_data_length; 1887 xcRB32.status = xcRB64.status; 1888 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32))) 1889 return -EFAULT; 1890 return rc; 1891 } 1892 1893 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd, 1894 unsigned long arg) 1895 { 1896 int rc; 1897 struct ap_perms *perms = 1898 (struct ap_perms *) filp->private_data; 1899 1900 rc = zcrypt_check_ioctl(perms, cmd); 1901 if (rc) 1902 return rc; 1903 1904 if (cmd == ICARSAMODEXPO) 1905 return trans_modexpo32(perms, filp, cmd, arg); 1906 if (cmd == ICARSACRT) 1907 return trans_modexpo_crt32(perms, filp, cmd, arg); 1908 if (cmd == ZSECSENDCPRB) 1909 return trans_xcRB32(perms, filp, cmd, arg); 1910 return zcrypt_unlocked_ioctl(filp, cmd, arg); 1911 } 1912 #endif 1913 1914 /* 1915 * Misc device file operations. 1916 */ 1917 static const struct file_operations zcrypt_fops = { 1918 .owner = THIS_MODULE, 1919 .read = zcrypt_read, 1920 .write = zcrypt_write, 1921 .unlocked_ioctl = zcrypt_unlocked_ioctl, 1922 #ifdef CONFIG_COMPAT 1923 .compat_ioctl = zcrypt_compat_ioctl, 1924 #endif 1925 .open = zcrypt_open, 1926 .release = zcrypt_release, 1927 .llseek = no_llseek, 1928 }; 1929 1930 /* 1931 * Misc device. 1932 */ 1933 static struct miscdevice zcrypt_misc_device = { 1934 .minor = MISC_DYNAMIC_MINOR, 1935 .name = "z90crypt", 1936 .fops = &zcrypt_fops, 1937 }; 1938 1939 static int zcrypt_rng_device_count; 1940 static u32 *zcrypt_rng_buffer; 1941 static int zcrypt_rng_buffer_index; 1942 static DEFINE_MUTEX(zcrypt_rng_mutex); 1943 1944 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data) 1945 { 1946 int rc; 1947 1948 /* 1949 * We don't need locking here because the RNG API guarantees serialized 1950 * read method calls. 1951 */ 1952 if (zcrypt_rng_buffer_index == 0) { 1953 rc = zcrypt_rng((char *) zcrypt_rng_buffer); 1954 /* on failure: retry once again after a requested rescan */ 1955 if ((rc == -ENODEV) && (zcrypt_process_rescan())) 1956 rc = zcrypt_rng((char *) zcrypt_rng_buffer); 1957 if (rc < 0) 1958 return -EIO; 1959 zcrypt_rng_buffer_index = rc / sizeof(*data); 1960 } 1961 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index]; 1962 return sizeof(*data); 1963 } 1964 1965 static struct hwrng zcrypt_rng_dev = { 1966 .name = "zcrypt", 1967 .data_read = zcrypt_rng_data_read, 1968 .quality = 990, 1969 }; 1970 1971 int zcrypt_rng_device_add(void) 1972 { 1973 int rc = 0; 1974 1975 mutex_lock(&zcrypt_rng_mutex); 1976 if (zcrypt_rng_device_count == 0) { 1977 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL); 1978 if (!zcrypt_rng_buffer) { 1979 rc = -ENOMEM; 1980 goto out; 1981 } 1982 zcrypt_rng_buffer_index = 0; 1983 if (!zcrypt_hwrng_seed) 1984 zcrypt_rng_dev.quality = 0; 1985 rc = hwrng_register(&zcrypt_rng_dev); 1986 if (rc) 1987 goto out_free; 1988 zcrypt_rng_device_count = 1; 1989 } else 1990 zcrypt_rng_device_count++; 1991 mutex_unlock(&zcrypt_rng_mutex); 1992 return 0; 1993 1994 out_free: 1995 free_page((unsigned long) zcrypt_rng_buffer); 1996 out: 1997 mutex_unlock(&zcrypt_rng_mutex); 1998 return rc; 1999 } 2000 2001 void zcrypt_rng_device_remove(void) 2002 { 2003 mutex_lock(&zcrypt_rng_mutex); 2004 zcrypt_rng_device_count--; 2005 if (zcrypt_rng_device_count == 0) { 2006 hwrng_unregister(&zcrypt_rng_dev); 2007 free_page((unsigned long) zcrypt_rng_buffer); 2008 } 2009 mutex_unlock(&zcrypt_rng_mutex); 2010 } 2011 2012 /* 2013 * Wait until the zcrypt api is operational. 2014 * The AP bus scan and the binding of ap devices to device drivers is 2015 * an asynchronous job. This function waits until these initial jobs 2016 * are done and so the zcrypt api should be ready to serve crypto 2017 * requests - if there are resources available. The function uses an 2018 * internal timeout of 60s. The very first caller will either wait for 2019 * ap bus bindings complete or the timeout happens. This state will be 2020 * remembered for further callers which will only be blocked until a 2021 * decision is made (timeout or bindings complete). 2022 * On timeout -ETIME is returned, on success the return value is 0. 2023 */ 2024 int zcrypt_wait_api_operational(void) 2025 { 2026 static DEFINE_MUTEX(zcrypt_wait_api_lock); 2027 static int zcrypt_wait_api_state; 2028 int rc; 2029 2030 rc = mutex_lock_interruptible(&zcrypt_wait_api_lock); 2031 if (rc) 2032 return rc; 2033 2034 switch (zcrypt_wait_api_state) { 2035 case 0: 2036 /* initial state, invoke wait for the ap bus complete */ 2037 rc = ap_wait_init_apqn_bindings_complete( 2038 msecs_to_jiffies(60 * 1000)); 2039 switch (rc) { 2040 case 0: 2041 /* ap bus bindings are complete */ 2042 zcrypt_wait_api_state = 1; 2043 break; 2044 case -EINTR: 2045 /* interrupted, go back to caller */ 2046 break; 2047 case -ETIME: 2048 /* timeout */ 2049 ZCRYPT_DBF_WARN("%s ap_wait_init_apqn_bindings_complete()=ETIME\n", 2050 __func__); 2051 zcrypt_wait_api_state = -ETIME; 2052 break; 2053 default: 2054 /* other failure */ 2055 ZCRYPT_DBF_DBG("%s ap_wait_init_apqn_bindings_complete()=%d\n", 2056 __func__, rc); 2057 break; 2058 } 2059 break; 2060 case 1: 2061 /* a previous caller already found ap bus bindings complete */ 2062 rc = 0; 2063 break; 2064 default: 2065 /* a previous caller had timeout or other failure */ 2066 rc = zcrypt_wait_api_state; 2067 break; 2068 } 2069 2070 mutex_unlock(&zcrypt_wait_api_lock); 2071 2072 return rc; 2073 } 2074 EXPORT_SYMBOL(zcrypt_wait_api_operational); 2075 2076 int __init zcrypt_debug_init(void) 2077 { 2078 zcrypt_dbf_info = debug_register("zcrypt", 2, 1, 2079 DBF_MAX_SPRINTF_ARGS * sizeof(long)); 2080 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view); 2081 debug_set_level(zcrypt_dbf_info, DBF_ERR); 2082 2083 return 0; 2084 } 2085 2086 void zcrypt_debug_exit(void) 2087 { 2088 debug_unregister(zcrypt_dbf_info); 2089 } 2090 2091 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES 2092 2093 static int __init zcdn_init(void) 2094 { 2095 int rc; 2096 2097 /* create a new class 'zcrypt' */ 2098 zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME); 2099 if (IS_ERR(zcrypt_class)) { 2100 rc = PTR_ERR(zcrypt_class); 2101 goto out_class_create_failed; 2102 } 2103 zcrypt_class->dev_release = zcdn_device_release; 2104 2105 /* alloc device minor range */ 2106 rc = alloc_chrdev_region(&zcrypt_devt, 2107 0, ZCRYPT_MAX_MINOR_NODES, 2108 ZCRYPT_NAME); 2109 if (rc) 2110 goto out_alloc_chrdev_failed; 2111 2112 cdev_init(&zcrypt_cdev, &zcrypt_fops); 2113 zcrypt_cdev.owner = THIS_MODULE; 2114 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES); 2115 if (rc) 2116 goto out_cdev_add_failed; 2117 2118 /* need some class specific sysfs attributes */ 2119 rc = class_create_file(zcrypt_class, &class_attr_zcdn_create); 2120 if (rc) 2121 goto out_class_create_file_1_failed; 2122 rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy); 2123 if (rc) 2124 goto out_class_create_file_2_failed; 2125 2126 return 0; 2127 2128 out_class_create_file_2_failed: 2129 class_remove_file(zcrypt_class, &class_attr_zcdn_create); 2130 out_class_create_file_1_failed: 2131 cdev_del(&zcrypt_cdev); 2132 out_cdev_add_failed: 2133 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES); 2134 out_alloc_chrdev_failed: 2135 class_destroy(zcrypt_class); 2136 out_class_create_failed: 2137 return rc; 2138 } 2139 2140 static void zcdn_exit(void) 2141 { 2142 class_remove_file(zcrypt_class, &class_attr_zcdn_create); 2143 class_remove_file(zcrypt_class, &class_attr_zcdn_destroy); 2144 zcdn_destroy_all(); 2145 cdev_del(&zcrypt_cdev); 2146 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES); 2147 class_destroy(zcrypt_class); 2148 } 2149 2150 #endif 2151 2152 /* 2153 * zcrypt_api_init(): Module initialization. 2154 * 2155 * The module initialization code. 2156 */ 2157 int __init zcrypt_api_init(void) 2158 { 2159 int rc; 2160 2161 rc = zcrypt_debug_init(); 2162 if (rc) 2163 goto out; 2164 2165 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES 2166 rc = zcdn_init(); 2167 if (rc) 2168 goto out; 2169 #endif 2170 2171 /* Register the request sprayer. */ 2172 rc = misc_register(&zcrypt_misc_device); 2173 if (rc < 0) 2174 goto out_misc_register_failed; 2175 2176 zcrypt_msgtype6_init(); 2177 zcrypt_msgtype50_init(); 2178 2179 return 0; 2180 2181 out_misc_register_failed: 2182 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES 2183 zcdn_exit(); 2184 #endif 2185 zcrypt_debug_exit(); 2186 out: 2187 return rc; 2188 } 2189 2190 /* 2191 * zcrypt_api_exit(): Module termination. 2192 * 2193 * The module termination code. 2194 */ 2195 void __exit zcrypt_api_exit(void) 2196 { 2197 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES 2198 zcdn_exit(); 2199 #endif 2200 misc_deregister(&zcrypt_misc_device); 2201 zcrypt_msgtype6_exit(); 2202 zcrypt_msgtype50_exit(); 2203 zcrypt_ccamisc_exit(); 2204 zcrypt_ep11misc_exit(); 2205 zcrypt_debug_exit(); 2206 } 2207 2208 module_init(zcrypt_api_init); 2209 module_exit(zcrypt_api_exit); 2210