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 pr_fmt(fmt) "zcrypt: " fmt 16 17 #include <linux/export.h> 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/slab.h> 24 #include <linux/atomic.h> 25 #include <linux/uaccess.h> 26 #include <linux/hw_random.h> 27 #include <linux/debugfs.h> 28 #include <linux/cdev.h> 29 #include <linux/ctype.h> 30 #include <linux/capability.h> 31 #include <asm/debug.h> 32 33 #define CREATE_TRACE_POINTS 34 #include <asm/trace/zcrypt.h> 35 36 #include "zcrypt_api.h" 37 #include "zcrypt_debug.h" 38 39 #include "zcrypt_msgtype6.h" 40 #include "zcrypt_msgtype50.h" 41 #include "zcrypt_ccamisc.h" 42 #include "zcrypt_ep11misc.h" 43 44 /* 45 * Module description. 46 */ 47 MODULE_AUTHOR("IBM Corporation"); 48 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \ 49 "Copyright IBM Corp. 2001, 2012"); 50 MODULE_LICENSE("GPL"); 51 52 unsigned int zcrypt_mempool_threshold = 5; 53 module_param_named(mempool_threshold, zcrypt_mempool_threshold, uint, 0400); 54 MODULE_PARM_DESC(mempool_threshold, "CCA and EP11 request/reply mempool minimal items (min: 1)"); 55 56 /* 57 * zcrypt tracepoint functions 58 */ 59 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req); 60 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep); 61 62 DEFINE_SPINLOCK(zcrypt_list_lock); 63 LIST_HEAD(zcrypt_card_list); 64 65 static atomic_t zcrypt_open_count = ATOMIC_INIT(0); 66 67 static LIST_HEAD(zcrypt_ops_list); 68 69 /* Zcrypt related debug feature stuff. */ 70 debug_info_t *zcrypt_dbf_info; 71 72 /* 73 * Process a rescan of the transport layer. 74 * Runs a synchronous AP bus rescan. 75 * Returns true if something has changed (for example the 76 * bus scan has found and build up new devices) and it is 77 * worth to do a retry. Otherwise false is returned meaning 78 * no changes on the AP bus level. 79 */ 80 static inline bool zcrypt_process_rescan(void) 81 { 82 return ap_bus_force_rescan(); 83 } 84 85 void zcrypt_msgtype_register(struct zcrypt_ops *zops) 86 { 87 list_add_tail(&zops->list, &zcrypt_ops_list); 88 } 89 90 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops) 91 { 92 list_del_init(&zops->list); 93 } 94 95 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant) 96 { 97 struct zcrypt_ops *zops; 98 99 list_for_each_entry(zops, &zcrypt_ops_list, list) 100 if (zops->variant == variant && 101 (!strncmp(zops->name, name, sizeof(zops->name)))) 102 return zops; 103 return NULL; 104 } 105 EXPORT_SYMBOL(zcrypt_msgtype); 106 107 /* 108 * Multi device nodes extension functions. 109 */ 110 111 struct zcdn_device; 112 113 static void zcdn_device_release(struct device *dev); 114 static const struct class zcrypt_class = { 115 .name = ZCRYPT_NAME, 116 .dev_release = zcdn_device_release, 117 }; 118 static dev_t zcrypt_devt; 119 static struct cdev zcrypt_cdev; 120 121 struct zcdn_device { 122 struct device device; 123 struct ap_perms perms; 124 }; 125 126 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device) 127 128 #define ZCDN_MAX_NAME 32 129 130 static int zcdn_create(const char *name); 131 static int zcdn_destroy(const char *name); 132 133 /* 134 * Find zcdn device by name. 135 * Returns reference to the zcdn device which needs to be released 136 * with put_device() after use. 137 */ 138 static inline struct zcdn_device *find_zcdndev_by_name(const char *name) 139 { 140 struct device *dev = class_find_device_by_name(&zcrypt_class, name); 141 142 return dev ? to_zcdn_dev(dev) : NULL; 143 } 144 145 /* 146 * Find zcdn device by devt value. 147 * Returns reference to the zcdn device which needs to be released 148 * with put_device() after use. 149 */ 150 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt) 151 { 152 struct device *dev = class_find_device_by_devt(&zcrypt_class, devt); 153 154 return dev ? to_zcdn_dev(dev) : NULL; 155 } 156 157 static ssize_t ioctlmask_show(struct device *dev, 158 struct device_attribute *attr, 159 char *buf) 160 { 161 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 162 int i, n; 163 164 if (mutex_lock_interruptible(&ap_attr_mutex)) 165 return -ERESTARTSYS; 166 167 n = sysfs_emit(buf, "0x"); 168 for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++) 169 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.ioctlm[i]); 170 n += sysfs_emit_at(buf, n, "\n"); 171 172 mutex_unlock(&ap_attr_mutex); 173 174 return n; 175 } 176 177 static ssize_t ioctlmask_store(struct device *dev, 178 struct device_attribute *attr, 179 const char *buf, size_t count) 180 { 181 int rc; 182 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 183 184 rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm, 185 AP_IOCTLS, &ap_attr_mutex); 186 if (rc) 187 return rc; 188 189 return count; 190 } 191 192 static DEVICE_ATTR_RW(ioctlmask); 193 194 static ssize_t apmask_show(struct device *dev, 195 struct device_attribute *attr, 196 char *buf) 197 { 198 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 199 int i, n; 200 201 if (mutex_lock_interruptible(&ap_attr_mutex)) 202 return -ERESTARTSYS; 203 204 n = sysfs_emit(buf, "0x"); 205 for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++) 206 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.apm[i]); 207 n += sysfs_emit_at(buf, n, "\n"); 208 209 mutex_unlock(&ap_attr_mutex); 210 211 return n; 212 } 213 214 static ssize_t apmask_store(struct device *dev, 215 struct device_attribute *attr, 216 const char *buf, size_t count) 217 { 218 int rc; 219 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 220 221 rc = ap_parse_mask_str(buf, zcdndev->perms.apm, 222 AP_DEVICES, &ap_attr_mutex); 223 if (rc) 224 return rc; 225 226 return count; 227 } 228 229 static DEVICE_ATTR_RW(apmask); 230 231 static ssize_t aqmask_show(struct device *dev, 232 struct device_attribute *attr, 233 char *buf) 234 { 235 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 236 int i, n; 237 238 if (mutex_lock_interruptible(&ap_attr_mutex)) 239 return -ERESTARTSYS; 240 241 n = sysfs_emit(buf, "0x"); 242 for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++) 243 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.aqm[i]); 244 n += sysfs_emit_at(buf, n, "\n"); 245 246 mutex_unlock(&ap_attr_mutex); 247 248 return n; 249 } 250 251 static ssize_t aqmask_store(struct device *dev, 252 struct device_attribute *attr, 253 const char *buf, size_t count) 254 { 255 int rc; 256 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 257 258 rc = ap_parse_mask_str(buf, zcdndev->perms.aqm, 259 AP_DOMAINS, &ap_attr_mutex); 260 if (rc) 261 return rc; 262 263 return count; 264 } 265 266 static DEVICE_ATTR_RW(aqmask); 267 268 static ssize_t admask_show(struct device *dev, 269 struct device_attribute *attr, 270 char *buf) 271 { 272 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 273 int i, n; 274 275 if (mutex_lock_interruptible(&ap_attr_mutex)) 276 return -ERESTARTSYS; 277 278 n = sysfs_emit(buf, "0x"); 279 for (i = 0; i < sizeof(zcdndev->perms.adm) / sizeof(long); i++) 280 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.adm[i]); 281 n += sysfs_emit_at(buf, n, "\n"); 282 283 mutex_unlock(&ap_attr_mutex); 284 285 return n; 286 } 287 288 static ssize_t admask_store(struct device *dev, 289 struct device_attribute *attr, 290 const char *buf, size_t count) 291 { 292 int rc; 293 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 294 295 rc = ap_parse_mask_str(buf, zcdndev->perms.adm, 296 AP_DOMAINS, &ap_attr_mutex); 297 if (rc) 298 return rc; 299 300 return count; 301 } 302 303 static DEVICE_ATTR_RW(admask); 304 305 static struct attribute *zcdn_dev_attrs[] = { 306 &dev_attr_ioctlmask.attr, 307 &dev_attr_apmask.attr, 308 &dev_attr_aqmask.attr, 309 &dev_attr_admask.attr, 310 NULL 311 }; 312 313 static struct attribute_group zcdn_dev_attr_group = { 314 .attrs = zcdn_dev_attrs 315 }; 316 317 static const struct attribute_group *zcdn_dev_attr_groups[] = { 318 &zcdn_dev_attr_group, 319 NULL 320 }; 321 322 static ssize_t zcdn_create_store(const struct class *class, 323 const struct class_attribute *attr, 324 const char *buf, size_t count) 325 { 326 int rc; 327 char name[ZCDN_MAX_NAME]; 328 329 strscpy(name, skip_spaces(buf), sizeof(name)); 330 331 rc = zcdn_create(strim(name)); 332 333 return rc ? rc : count; 334 } 335 336 static const struct class_attribute class_attr_zcdn_create = 337 __ATTR(create, 0600, NULL, zcdn_create_store); 338 339 static ssize_t zcdn_destroy_store(const struct class *class, 340 const struct class_attribute *attr, 341 const char *buf, size_t count) 342 { 343 int rc; 344 char name[ZCDN_MAX_NAME]; 345 346 strscpy(name, skip_spaces(buf), sizeof(name)); 347 348 rc = zcdn_destroy(strim(name)); 349 350 return rc ? rc : count; 351 } 352 353 static const struct class_attribute class_attr_zcdn_destroy = 354 __ATTR(destroy, 0600, NULL, zcdn_destroy_store); 355 356 static void zcdn_device_release(struct device *dev) 357 { 358 struct zcdn_device *zcdndev = to_zcdn_dev(dev); 359 360 ZCRYPT_DBF_INFO("%s releasing zcdn device %d:%d\n", 361 __func__, MAJOR(dev->devt), MINOR(dev->devt)); 362 363 kfree(zcdndev); 364 } 365 366 static int zcdn_create(const char *name) 367 { 368 dev_t devt; 369 int i, rc = 0; 370 struct zcdn_device *zcdndev; 371 372 if (mutex_lock_interruptible(&ap_attr_mutex)) 373 return -ERESTARTSYS; 374 375 /* check if device node with this name already exists */ 376 if (name[0]) { 377 zcdndev = find_zcdndev_by_name(name); 378 if (zcdndev) { 379 put_device(&zcdndev->device); 380 rc = -EEXIST; 381 goto unlockout; 382 } 383 } 384 385 /* find an unused minor number */ 386 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) { 387 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i); 388 zcdndev = find_zcdndev_by_devt(devt); 389 if (zcdndev) 390 put_device(&zcdndev->device); 391 else 392 break; 393 } 394 if (i == ZCRYPT_MAX_MINOR_NODES) { 395 rc = -ENOSPC; 396 goto unlockout; 397 } 398 399 /* alloc and prepare a new zcdn device */ 400 zcdndev = kzalloc_obj(*zcdndev); 401 if (!zcdndev) { 402 rc = -ENOMEM; 403 goto unlockout; 404 } 405 zcdndev->device.release = zcdn_device_release; 406 zcdndev->device.class = &zcrypt_class; 407 zcdndev->device.devt = devt; 408 zcdndev->device.groups = zcdn_dev_attr_groups; 409 if (name[0]) 410 rc = dev_set_name(&zcdndev->device, "%s", name); 411 else 412 rc = dev_set_name(&zcdndev->device, ZCRYPT_NAME "_%d", (int)MINOR(devt)); 413 if (rc) { 414 kfree(zcdndev); 415 goto unlockout; 416 } 417 rc = device_register(&zcdndev->device); 418 if (rc) { 419 put_device(&zcdndev->device); 420 goto unlockout; 421 } 422 423 ZCRYPT_DBF_INFO("%s created zcdn device %d:%d\n", 424 __func__, MAJOR(devt), MINOR(devt)); 425 426 unlockout: 427 mutex_unlock(&ap_attr_mutex); 428 return rc; 429 } 430 431 static int zcdn_destroy(const char *name) 432 { 433 int rc = 0; 434 struct zcdn_device *zcdndev; 435 436 if (mutex_lock_interruptible(&ap_attr_mutex)) 437 return -ERESTARTSYS; 438 439 /* try to find this zcdn device */ 440 zcdndev = find_zcdndev_by_name(name); 441 if (!zcdndev) { 442 rc = -ENOENT; 443 goto unlockout; 444 } 445 446 /* 447 * The zcdn device is not hard destroyed. It is subject to 448 * reference counting and thus just needs to be unregistered. 449 */ 450 put_device(&zcdndev->device); 451 device_unregister(&zcdndev->device); 452 453 unlockout: 454 mutex_unlock(&ap_attr_mutex); 455 return rc; 456 } 457 458 static void zcdn_destroy_all(void) 459 { 460 int i; 461 dev_t devt; 462 struct zcdn_device *zcdndev; 463 464 mutex_lock(&ap_attr_mutex); 465 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) { 466 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i); 467 zcdndev = find_zcdndev_by_devt(devt); 468 if (zcdndev) { 469 put_device(&zcdndev->device); 470 device_unregister(&zcdndev->device); 471 } 472 } 473 mutex_unlock(&ap_attr_mutex); 474 } 475 476 /* 477 * zcrypt_read (): Not supported beyond zcrypt 1.3.1. 478 * 479 * This function is not supported beyond zcrypt 1.3.1. 480 */ 481 static ssize_t zcrypt_read(struct file *filp, char __user *buf, 482 size_t count, loff_t *f_pos) 483 { 484 return -EPERM; 485 } 486 487 /* 488 * zcrypt_write(): Not allowed. 489 * 490 * Write is not allowed 491 */ 492 static ssize_t zcrypt_write(struct file *filp, const char __user *buf, 493 size_t count, loff_t *f_pos) 494 { 495 return -EPERM; 496 } 497 498 /* 499 * zcrypt_open(): Count number of users. 500 * 501 * Device open function to count number of users. 502 */ 503 static int zcrypt_open(struct inode *inode, struct file *filp) 504 { 505 struct ap_perms *perms = &ap_perms; 506 507 if (filp->f_inode->i_cdev == &zcrypt_cdev) { 508 struct zcdn_device *zcdndev; 509 510 if (mutex_lock_interruptible(&ap_attr_mutex)) 511 return -ERESTARTSYS; 512 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev); 513 /* find returns a reference, no get_device() needed */ 514 mutex_unlock(&ap_attr_mutex); 515 if (zcdndev) 516 perms = &zcdndev->perms; 517 } 518 filp->private_data = (void *)perms; 519 520 atomic_inc(&zcrypt_open_count); 521 return stream_open(inode, filp); 522 } 523 524 /* 525 * zcrypt_release(): Count number of users. 526 * 527 * Device close function to count number of users. 528 */ 529 static int zcrypt_release(struct inode *inode, struct file *filp) 530 { 531 if (filp->f_inode->i_cdev == &zcrypt_cdev) { 532 struct zcdn_device *zcdndev; 533 534 mutex_lock(&ap_attr_mutex); 535 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev); 536 mutex_unlock(&ap_attr_mutex); 537 if (zcdndev) { 538 /* 2 puts here: one for find, one for open */ 539 put_device(&zcdndev->device); 540 put_device(&zcdndev->device); 541 } 542 } 543 544 atomic_dec(&zcrypt_open_count); 545 return 0; 546 } 547 548 static inline int zcrypt_check_ioctl(struct ap_perms *perms, 549 unsigned int cmd) 550 { 551 int rc = -EPERM; 552 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT; 553 554 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) { 555 if (test_bit_inv(ioctlnr, perms->ioctlm)) 556 rc = 0; 557 } 558 559 if (rc) 560 ZCRYPT_DBF_WARN("%s ioctl check failed: ioctlnr=0x%04x rc=%d\n", 561 __func__, ioctlnr, rc); 562 563 return rc; 564 } 565 566 static inline bool zcrypt_check_card(struct ap_perms *perms, int card) 567 { 568 return test_bit_inv(card, perms->apm) ? true : false; 569 } 570 571 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue) 572 { 573 return test_bit_inv(queue, perms->aqm) ? true : false; 574 } 575 576 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc, 577 struct zcrypt_queue *zq, 578 struct module **pmod, 579 unsigned int weight) 580 { 581 if (!zq || !try_module_get(zq->queue->ap_dev.device.driver->owner)) 582 return NULL; 583 zcrypt_card_get(zc); 584 zcrypt_queue_get(zq); 585 get_device(&zq->queue->ap_dev.device); 586 atomic_add(weight, &zc->load); 587 atomic_add(weight, &zq->load); 588 zq->request_count++; 589 *pmod = zq->queue->ap_dev.device.driver->owner; 590 return zq; 591 } 592 593 static inline void zcrypt_drop_queue(struct zcrypt_card *zc, 594 struct zcrypt_queue *zq, 595 struct module *mod, 596 unsigned int weight) 597 { 598 zq->request_count--; 599 atomic_sub(weight, &zc->load); 600 atomic_sub(weight, &zq->load); 601 put_device(&zq->queue->ap_dev.device); 602 zcrypt_queue_put(zq); 603 zcrypt_card_put(zc); 604 module_put(mod); 605 } 606 607 static inline bool zcrypt_card_compare(struct zcrypt_card *zc, 608 struct zcrypt_card *pref_zc, 609 unsigned int weight, 610 unsigned int pref_weight) 611 { 612 if (!pref_zc) 613 return true; 614 weight += atomic_read(&zc->load); 615 pref_weight += atomic_read(&pref_zc->load); 616 if (weight == pref_weight) 617 return atomic64_read(&zc->card->total_request_count) < 618 atomic64_read(&pref_zc->card->total_request_count); 619 return weight < pref_weight; 620 } 621 622 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq, 623 struct zcrypt_queue *pref_zq, 624 unsigned int weight, 625 unsigned int pref_weight) 626 { 627 if (!pref_zq) 628 return true; 629 weight += atomic_read(&zq->load); 630 pref_weight += atomic_read(&pref_zq->load); 631 if (weight == pref_weight) 632 return zq->queue->total_request_count < 633 pref_zq->queue->total_request_count; 634 return weight < pref_weight; 635 } 636 637 /* 638 * zcrypt ioctls. 639 */ 640 static long zcrypt_rsa_modexpo(struct ap_perms *perms, 641 struct zcrypt_track *tr, 642 struct ica_rsa_modexpo *mex) 643 { 644 struct zcrypt_card *zc, *pref_zc; 645 struct zcrypt_queue *zq, *pref_zq; 646 struct ap_message ap_msg; 647 unsigned int wgt = 0, pref_wgt = 0; 648 unsigned int func_code = 0; 649 int cpen, qpen, qid = 0, rc; 650 struct module *mod; 651 652 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO); 653 654 rc = ap_init_apmsg(&ap_msg, 0); 655 if (rc) 656 goto out; 657 658 if (mex->outputdatalength < mex->inputdatalength) { 659 rc = -EINVAL; 660 goto out; 661 } 662 663 /* 664 * As long as outputdatalength is big enough, we can set the 665 * outputdatalength equal to the inputdatalength, since that is the 666 * number of bytes we will copy in any case 667 */ 668 mex->outputdatalength = mex->inputdatalength; 669 670 rc = get_rsa_modex_fc(mex, &func_code); 671 if (rc) 672 goto out; 673 674 pref_zc = NULL; 675 pref_zq = NULL; 676 spin_lock(&zcrypt_list_lock); 677 for_each_zcrypt_card(zc) { 678 /* Check for usable accelerator or CCA card */ 679 if (!zc->online || !zc->card->config || zc->card->chkstop || 680 !(zc->card->hwinfo.accel || zc->card->hwinfo.cca)) 681 continue; 682 /* Check for size limits */ 683 if (zc->min_mod_size > mex->inputdatalength || 684 zc->max_mod_size < mex->inputdatalength) 685 continue; 686 /* check if device node has admission for this card */ 687 if (!zcrypt_check_card(perms, zc->card->id)) 688 continue; 689 /* get weight index of the card device */ 690 wgt = zc->speed_rating[func_code]; 691 /* penalty if this msg was previously sent via this card */ 692 cpen = (tr && tr->again_counter && tr->last_qid && 693 AP_QID_CARD(tr->last_qid) == zc->card->id) ? 694 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; 695 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) 696 continue; 697 for_each_zcrypt_queue(zq, zc) { 698 /* check if device is usable and eligible */ 699 if (!zq->online || !zq->ops->rsa_modexpo || 700 !ap_queue_usable(zq->queue)) 701 continue; 702 /* check if device node has admission for this queue */ 703 if (!zcrypt_check_queue(perms, 704 AP_QID_QUEUE(zq->queue->qid))) 705 continue; 706 /* penalty if the msg was previously sent at this qid */ 707 qpen = (tr && tr->again_counter && tr->last_qid && 708 tr->last_qid == zq->queue->qid) ? 709 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; 710 if (!zcrypt_queue_compare(zq, pref_zq, 711 wgt + cpen + qpen, pref_wgt)) 712 continue; 713 pref_zc = zc; 714 pref_zq = zq; 715 pref_wgt = wgt + cpen + qpen; 716 } 717 } 718 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 719 spin_unlock(&zcrypt_list_lock); 720 721 if (!pref_zq) { 722 pr_debug("no matching queue found => ENODEV\n"); 723 rc = -ENODEV; 724 goto out; 725 } 726 727 qid = pref_zq->queue->qid; 728 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg); 729 730 spin_lock(&zcrypt_list_lock); 731 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 732 spin_unlock(&zcrypt_list_lock); 733 734 out: 735 ap_release_apmsg(&ap_msg); 736 if (tr) { 737 tr->last_rc = rc; 738 tr->last_qid = qid; 739 } 740 trace_s390_zcrypt_rep(mex, func_code, rc, 741 AP_QID_CARD(qid), AP_QID_QUEUE(qid), 742 ap_msg.psmid); 743 return rc; 744 } 745 746 static long zcrypt_rsa_crt(struct ap_perms *perms, 747 struct zcrypt_track *tr, 748 struct ica_rsa_modexpo_crt *crt) 749 { 750 struct zcrypt_card *zc, *pref_zc; 751 struct zcrypt_queue *zq, *pref_zq; 752 struct ap_message ap_msg; 753 unsigned int wgt = 0, pref_wgt = 0; 754 unsigned int func_code = 0; 755 int cpen, qpen, qid = 0, rc; 756 struct module *mod; 757 758 trace_s390_zcrypt_req(crt, TP_ICARSACRT); 759 760 rc = ap_init_apmsg(&ap_msg, 0); 761 if (rc) 762 goto out; 763 764 if (crt->outputdatalength < crt->inputdatalength) { 765 rc = -EINVAL; 766 goto out; 767 } 768 769 /* 770 * As long as outputdatalength is big enough, we can set the 771 * outputdatalength equal to the inputdatalength, since that is the 772 * number of bytes we will copy in any case 773 */ 774 crt->outputdatalength = crt->inputdatalength; 775 776 rc = get_rsa_crt_fc(crt, &func_code); 777 if (rc) 778 goto out; 779 780 pref_zc = NULL; 781 pref_zq = NULL; 782 spin_lock(&zcrypt_list_lock); 783 for_each_zcrypt_card(zc) { 784 /* Check for usable accelerator or CCA card */ 785 if (!zc->online || !zc->card->config || zc->card->chkstop || 786 !(zc->card->hwinfo.accel || zc->card->hwinfo.cca)) 787 continue; 788 /* Check for size limits */ 789 if (zc->min_mod_size > crt->inputdatalength || 790 zc->max_mod_size < crt->inputdatalength) 791 continue; 792 /* check if device node has admission for this card */ 793 if (!zcrypt_check_card(perms, zc->card->id)) 794 continue; 795 /* get weight index of the card device */ 796 wgt = zc->speed_rating[func_code]; 797 /* penalty if this msg was previously sent via this card */ 798 cpen = (tr && tr->again_counter && tr->last_qid && 799 AP_QID_CARD(tr->last_qid) == zc->card->id) ? 800 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; 801 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) 802 continue; 803 for_each_zcrypt_queue(zq, zc) { 804 /* check if device is usable and eligible */ 805 if (!zq->online || !zq->ops->rsa_modexpo_crt || 806 !ap_queue_usable(zq->queue)) 807 continue; 808 /* check if device node has admission for this queue */ 809 if (!zcrypt_check_queue(perms, 810 AP_QID_QUEUE(zq->queue->qid))) 811 continue; 812 /* penalty if the msg was previously sent at this qid */ 813 qpen = (tr && tr->again_counter && tr->last_qid && 814 tr->last_qid == zq->queue->qid) ? 815 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; 816 if (!zcrypt_queue_compare(zq, pref_zq, 817 wgt + cpen + qpen, pref_wgt)) 818 continue; 819 pref_zc = zc; 820 pref_zq = zq; 821 pref_wgt = wgt + cpen + qpen; 822 } 823 } 824 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 825 spin_unlock(&zcrypt_list_lock); 826 827 if (!pref_zq) { 828 pr_debug("no matching queue found => ENODEV\n"); 829 rc = -ENODEV; 830 goto out; 831 } 832 833 qid = pref_zq->queue->qid; 834 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg); 835 836 spin_lock(&zcrypt_list_lock); 837 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 838 spin_unlock(&zcrypt_list_lock); 839 840 out: 841 ap_release_apmsg(&ap_msg); 842 if (tr) { 843 tr->last_rc = rc; 844 tr->last_qid = qid; 845 } 846 trace_s390_zcrypt_rep(crt, func_code, rc, 847 AP_QID_CARD(qid), AP_QID_QUEUE(qid), 848 ap_msg.psmid); 849 return rc; 850 } 851 852 static long _zcrypt_send_cprb(u32 xflags, struct ap_perms *perms, 853 struct zcrypt_track *tr, 854 struct ica_xcRB *xcrb) 855 { 856 bool userspace = xflags & ZCRYPT_XFLAG_USERSPACE; 857 unsigned int card, domain, func_code = 0; 858 unsigned int wgt = 0, pref_wgt = 0; 859 struct zcrypt_queue *zq, *pref_zq; 860 struct zcrypt_card *zc, *pref_zc; 861 int cpen, qpen, qid = 0, rc; 862 struct ap_message ap_msg; 863 struct module *mod; 864 865 trace_s390_zcrypt_req(xcrb, TB_ZSECSENDCPRB); 866 867 xcrb->status = 0; 868 869 rc = ap_init_apmsg(&ap_msg, xflags & ZCRYPT_XFLAG_NOMEMALLOC ? 870 AP_MSG_FLAG_MEMPOOL : 0); 871 if (rc) 872 goto out; 873 874 rc = prep_cca_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain); 875 if (rc) 876 goto out; 877 print_hex_dump_debug("ccareq: ", DUMP_PREFIX_ADDRESS, 16, 1, 878 ap_msg.msg, ap_msg.len, false); 879 880 if (perms != &ap_perms && domain < AP_DOMAINS) { 881 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) { 882 domain = array_index_nospec(domain, AP_DOMAINS); 883 if (!test_bit_inv(domain, perms->adm)) { 884 rc = -ENODEV; 885 goto out; 886 } 887 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) { 888 rc = -EOPNOTSUPP; 889 goto out; 890 } 891 } 892 /* 893 * If a valid target domain is set and this domain is NOT a usage 894 * domain but a control only domain, autoselect target domain. 895 */ 896 if (domain < AP_DOMAINS && 897 !ap_test_config_usage_domain(domain) && 898 ap_test_config_ctrl_domain(domain)) 899 domain = AUTOSEL_DOM; 900 901 pref_zc = NULL; 902 pref_zq = NULL; 903 card = xcrb->user_defined; 904 spin_lock(&zcrypt_list_lock); 905 for_each_zcrypt_card(zc) { 906 /* Check for usable CCA card */ 907 if (!zc->online || !zc->card->config || zc->card->chkstop || 908 !zc->card->hwinfo.cca) 909 continue; 910 /* Check for user selected CCA card */ 911 if (card != AUTOSELECT && card != zc->card->id) 912 continue; 913 /* check if request size exceeds card max msg size */ 914 if (ap_msg.len > zc->card->maxmsgsize) 915 continue; 916 /* check if device node has admission for this card */ 917 if (!zcrypt_check_card(perms, zc->card->id)) 918 continue; 919 /* get weight index of the card device */ 920 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY]; 921 /* penalty if this msg was previously sent via this card */ 922 cpen = (tr && tr->again_counter && tr->last_qid && 923 AP_QID_CARD(tr->last_qid) == zc->card->id) ? 924 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; 925 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) 926 continue; 927 for_each_zcrypt_queue(zq, zc) { 928 /* check for device usable and eligible */ 929 if (!zq->online || !zq->ops->send_cprb || 930 !ap_queue_usable(zq->queue) || 931 (domain != AUTOSEL_DOM && 932 domain != AP_QID_QUEUE(zq->queue->qid))) 933 continue; 934 /* check if device node has admission for this queue */ 935 if (!zcrypt_check_queue(perms, 936 AP_QID_QUEUE(zq->queue->qid))) 937 continue; 938 /* penalty if the msg was previously sent at this qid */ 939 qpen = (tr && tr->again_counter && tr->last_qid && 940 tr->last_qid == zq->queue->qid) ? 941 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; 942 if (!zcrypt_queue_compare(zq, pref_zq, 943 wgt + cpen + qpen, pref_wgt)) 944 continue; 945 pref_zc = zc; 946 pref_zq = zq; 947 pref_wgt = wgt + cpen + qpen; 948 } 949 } 950 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 951 spin_unlock(&zcrypt_list_lock); 952 953 if (!pref_zq) { 954 pr_debug("no match for address %02x.%04x => ENODEV\n", 955 card, domain); 956 rc = -ENODEV; 957 goto out; 958 } 959 960 rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcrb, &ap_msg); 961 if (!rc) { 962 print_hex_dump_debug("ccarpl: ", DUMP_PREFIX_ADDRESS, 16, 1, 963 ap_msg.msg, ap_msg.len, false); 964 } 965 966 spin_lock(&zcrypt_list_lock); 967 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 968 spin_unlock(&zcrypt_list_lock); 969 970 out: 971 ap_release_apmsg(&ap_msg); 972 if (tr) { 973 tr->last_rc = rc; 974 tr->last_qid = qid; 975 } 976 trace_s390_zcrypt_rep(xcrb, func_code, rc, 977 AP_QID_CARD(qid), AP_QID_QUEUE(qid), 978 ap_msg.psmid); 979 return rc; 980 } 981 982 long zcrypt_send_cprb(struct ica_xcRB *xcrb, u32 xflags) 983 { 984 struct zcrypt_track tr; 985 int rc; 986 987 memset(&tr, 0, sizeof(tr)); 988 989 do { 990 rc = _zcrypt_send_cprb(xflags, &ap_perms, &tr, xcrb); 991 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 992 993 /* on ENODEV failure: retry once again after a requested rescan */ 994 if (rc == -ENODEV && zcrypt_process_rescan()) 995 do { 996 rc = _zcrypt_send_cprb(xflags, &ap_perms, &tr, xcrb); 997 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 998 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 999 rc = -EIO; 1000 if (rc) 1001 pr_debug("rc=%d\n", rc); 1002 1003 return rc; 1004 } 1005 EXPORT_SYMBOL(zcrypt_send_cprb); 1006 1007 static bool is_desired_ep11_card(unsigned int dev_id, 1008 unsigned short target_num, 1009 struct ep11_target_dev *targets) 1010 { 1011 while (target_num-- > 0) { 1012 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP) 1013 return true; 1014 targets++; 1015 } 1016 return false; 1017 } 1018 1019 static bool is_desired_ep11_queue(unsigned int dev_qid, 1020 unsigned short target_num, 1021 struct ep11_target_dev *targets) 1022 { 1023 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid); 1024 1025 while (target_num-- > 0) { 1026 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) && 1027 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM)) 1028 return true; 1029 targets++; 1030 } 1031 return false; 1032 } 1033 1034 static long _zcrypt_send_ep11_cprb(u32 xflags, struct ap_perms *perms, 1035 struct zcrypt_track *tr, 1036 struct ep11_urb *xcrb) 1037 { 1038 bool userspace = xflags & ZCRYPT_XFLAG_USERSPACE; 1039 struct zcrypt_card *zc, *pref_zc; 1040 struct zcrypt_queue *zq, *pref_zq; 1041 struct ep11_target_dev *targets = NULL; 1042 unsigned short target_num; 1043 unsigned int wgt = 0, pref_wgt = 0; 1044 unsigned int func_code = 0, domain; 1045 struct ap_message ap_msg; 1046 int cpen, qpen, qid = 0, rc; 1047 struct module *mod; 1048 1049 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB); 1050 1051 rc = ap_init_apmsg(&ap_msg, xflags & ZCRYPT_XFLAG_NOMEMALLOC ? 1052 AP_MSG_FLAG_MEMPOOL : 0); 1053 if (rc) 1054 goto out; 1055 1056 target_num = (unsigned short)xcrb->targets_num; 1057 1058 /* empty list indicates autoselect (all available targets) */ 1059 rc = -ENOMEM; 1060 if (target_num != 0) { 1061 if (userspace) { 1062 targets = kzalloc_objs(*targets, target_num); 1063 if (!targets) 1064 goto out; 1065 if (copy_from_user(targets, xcrb->targets, 1066 target_num * sizeof(*targets))) { 1067 rc = -EFAULT; 1068 goto out; 1069 } 1070 } else { 1071 targets = (struct ep11_target_dev __force __kernel *)xcrb->targets; 1072 } 1073 } 1074 1075 rc = prep_ep11_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain); 1076 if (rc) 1077 goto out; 1078 print_hex_dump_debug("ep11req: ", DUMP_PREFIX_ADDRESS, 16, 1, 1079 ap_msg.msg, ap_msg.len, false); 1080 1081 if (perms != &ap_perms && domain < AP_DOMAINS) { 1082 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) { 1083 domain = array_index_nospec(domain, AP_DOMAINS); 1084 if (!test_bit_inv(domain, perms->adm)) { 1085 rc = -ENODEV; 1086 goto out; 1087 } 1088 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) { 1089 rc = -EOPNOTSUPP; 1090 goto out; 1091 } 1092 } 1093 1094 pref_zc = NULL; 1095 pref_zq = NULL; 1096 spin_lock(&zcrypt_list_lock); 1097 for_each_zcrypt_card(zc) { 1098 /* Check for usable EP11 card */ 1099 if (!zc->online || !zc->card->config || zc->card->chkstop || 1100 !zc->card->hwinfo.ep11) 1101 continue; 1102 /* Check for user selected EP11 card */ 1103 if (targets && 1104 !is_desired_ep11_card(zc->card->id, target_num, targets)) 1105 continue; 1106 /* check if request size exceeds card max msg size */ 1107 if (ap_msg.len > zc->card->maxmsgsize) 1108 continue; 1109 /* check if device node has admission for this card */ 1110 if (!zcrypt_check_card(perms, zc->card->id)) 1111 continue; 1112 /* get weight index of the card device */ 1113 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY]; 1114 /* penalty if this msg was previously sent via this card */ 1115 cpen = (tr && tr->again_counter && tr->last_qid && 1116 AP_QID_CARD(tr->last_qid) == zc->card->id) ? 1117 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0; 1118 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt)) 1119 continue; 1120 for_each_zcrypt_queue(zq, zc) { 1121 /* check if device is usable and eligible */ 1122 if (!zq->online || !zq->ops->send_ep11_cprb || 1123 !ap_queue_usable(zq->queue) || 1124 (targets && 1125 !is_desired_ep11_queue(zq->queue->qid, 1126 target_num, targets))) 1127 continue; 1128 /* check if device node has admission for this queue */ 1129 if (!zcrypt_check_queue(perms, 1130 AP_QID_QUEUE(zq->queue->qid))) 1131 continue; 1132 /* penalty if the msg was previously sent at this qid */ 1133 qpen = (tr && tr->again_counter && tr->last_qid && 1134 tr->last_qid == zq->queue->qid) ? 1135 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0; 1136 if (!zcrypt_queue_compare(zq, pref_zq, 1137 wgt + cpen + qpen, pref_wgt)) 1138 continue; 1139 pref_zc = zc; 1140 pref_zq = zq; 1141 pref_wgt = wgt + cpen + qpen; 1142 } 1143 } 1144 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 1145 spin_unlock(&zcrypt_list_lock); 1146 1147 if (!pref_zq) { 1148 if (targets && target_num == 1) { 1149 pr_debug("no match for address %02x.%04x => ENODEV\n", 1150 (int)targets->ap_id, (int)targets->dom_id); 1151 } else if (targets) { 1152 pr_debug("no match for %d target addrs => ENODEV\n", 1153 (int)target_num); 1154 } else { 1155 pr_debug("no match for address ff.ffff => ENODEV\n"); 1156 } 1157 rc = -ENODEV; 1158 goto out; 1159 } 1160 1161 qid = pref_zq->queue->qid; 1162 rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg); 1163 if (!rc) { 1164 print_hex_dump_debug("ep11rpl: ", DUMP_PREFIX_ADDRESS, 16, 1, 1165 ap_msg.msg, ap_msg.len, false); 1166 } 1167 1168 spin_lock(&zcrypt_list_lock); 1169 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 1170 spin_unlock(&zcrypt_list_lock); 1171 1172 out: 1173 if (userspace) 1174 kfree(targets); 1175 ap_release_apmsg(&ap_msg); 1176 if (tr) { 1177 tr->last_rc = rc; 1178 tr->last_qid = qid; 1179 } 1180 trace_s390_zcrypt_rep(xcrb, func_code, rc, 1181 AP_QID_CARD(qid), AP_QID_QUEUE(qid), 1182 ap_msg.psmid); 1183 return rc; 1184 } 1185 1186 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb, u32 xflags) 1187 { 1188 struct zcrypt_track tr; 1189 int rc; 1190 1191 memset(&tr, 0, sizeof(tr)); 1192 1193 do { 1194 rc = _zcrypt_send_ep11_cprb(xflags, &ap_perms, &tr, xcrb); 1195 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1196 1197 /* on ENODEV failure: retry once again after a requested rescan */ 1198 if (rc == -ENODEV && zcrypt_process_rescan()) 1199 do { 1200 rc = _zcrypt_send_ep11_cprb(xflags, &ap_perms, &tr, xcrb); 1201 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1202 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1203 rc = -EIO; 1204 if (rc) 1205 pr_debug("rc=%d\n", rc); 1206 1207 return rc; 1208 } 1209 EXPORT_SYMBOL(zcrypt_send_ep11_cprb); 1210 1211 static long zcrypt_rng(char *buffer) 1212 { 1213 struct zcrypt_card *zc, *pref_zc; 1214 struct zcrypt_queue *zq, *pref_zq; 1215 unsigned int wgt = 0, pref_wgt = 0; 1216 unsigned int func_code = 0; 1217 struct ap_message ap_msg; 1218 int qid = 0, rc = -ENODEV; 1219 struct module *mod; 1220 1221 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB); 1222 1223 rc = ap_init_apmsg(&ap_msg, 0); 1224 if (rc) 1225 goto out; 1226 rc = prep_rng_ap_msg(&ap_msg, &func_code, NULL); 1227 if (rc) 1228 goto out; 1229 1230 pref_zc = NULL; 1231 pref_zq = NULL; 1232 spin_lock(&zcrypt_list_lock); 1233 for_each_zcrypt_card(zc) { 1234 /* Check for usable CCA card */ 1235 if (!zc->online || !zc->card->config || zc->card->chkstop || 1236 !zc->card->hwinfo.cca) 1237 continue; 1238 /* get weight index of the card device */ 1239 wgt = zc->speed_rating[func_code]; 1240 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt)) 1241 continue; 1242 for_each_zcrypt_queue(zq, zc) { 1243 /* check if device is usable and eligible */ 1244 if (!zq->online || !zq->ops->rng || 1245 !ap_queue_usable(zq->queue)) 1246 continue; 1247 if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt)) 1248 continue; 1249 pref_zc = zc; 1250 pref_zq = zq; 1251 pref_wgt = wgt; 1252 } 1253 } 1254 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt); 1255 spin_unlock(&zcrypt_list_lock); 1256 1257 if (!pref_zq) { 1258 pr_debug("no matching queue found => ENODEV\n"); 1259 rc = -ENODEV; 1260 goto out; 1261 } 1262 1263 qid = pref_zq->queue->qid; 1264 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg); 1265 1266 spin_lock(&zcrypt_list_lock); 1267 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt); 1268 spin_unlock(&zcrypt_list_lock); 1269 1270 out: 1271 ap_release_apmsg(&ap_msg); 1272 trace_s390_zcrypt_rep(buffer, func_code, rc, 1273 AP_QID_CARD(qid), AP_QID_QUEUE(qid), 1274 ap_msg.psmid); 1275 return rc; 1276 } 1277 1278 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus) 1279 { 1280 struct zcrypt_card *zc; 1281 struct zcrypt_queue *zq; 1282 struct zcrypt_device_status *stat; 1283 int card, queue; 1284 1285 memset(devstatus, 0, MAX_ZDEV_ENTRIES 1286 * sizeof(struct zcrypt_device_status)); 1287 1288 spin_lock(&zcrypt_list_lock); 1289 for_each_zcrypt_card(zc) { 1290 for_each_zcrypt_queue(zq, zc) { 1291 card = AP_QID_CARD(zq->queue->qid); 1292 if (card >= MAX_ZDEV_CARDIDS) 1293 continue; 1294 queue = AP_QID_QUEUE(zq->queue->qid); 1295 stat = &devstatus[card * AP_DOMAINS + queue]; 1296 stat->hwtype = zc->card->ap_dev.device_type; 1297 stat->functions = zc->card->hwinfo.fac >> 26; 1298 stat->qid = zq->queue->qid; 1299 stat->online = zq->online ? 0x01 : 0x00; 1300 } 1301 } 1302 spin_unlock(&zcrypt_list_lock); 1303 } 1304 1305 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus, 1306 int maxcard, int maxqueue) 1307 { 1308 struct zcrypt_card *zc; 1309 struct zcrypt_queue *zq; 1310 struct zcrypt_device_status_ext *stat; 1311 int card, queue; 1312 1313 maxcard = min_t(int, maxcard, MAX_ZDEV_CARDIDS_EXT); 1314 maxqueue = min_t(int, maxqueue, MAX_ZDEV_DOMAINS_EXT); 1315 1316 spin_lock(&zcrypt_list_lock); 1317 for_each_zcrypt_card(zc) { 1318 for_each_zcrypt_queue(zq, zc) { 1319 card = AP_QID_CARD(zq->queue->qid); 1320 queue = AP_QID_QUEUE(zq->queue->qid); 1321 if (card >= maxcard || queue >= maxqueue) 1322 continue; 1323 stat = &devstatus[card * maxqueue + queue]; 1324 stat->hwtype = zc->card->ap_dev.device_type; 1325 stat->functions = zc->card->hwinfo.fac >> 26; 1326 stat->qid = zq->queue->qid; 1327 stat->online = zq->online ? 0x01 : 0x00; 1328 } 1329 } 1330 spin_unlock(&zcrypt_list_lock); 1331 } 1332 EXPORT_SYMBOL(zcrypt_device_status_mask_ext); 1333 1334 int zcrypt_device_status_ext(int card, int queue, 1335 struct zcrypt_device_status_ext *devstat) 1336 { 1337 struct zcrypt_card *zc; 1338 struct zcrypt_queue *zq; 1339 1340 memset(devstat, 0, sizeof(*devstat)); 1341 1342 spin_lock(&zcrypt_list_lock); 1343 for_each_zcrypt_card(zc) { 1344 for_each_zcrypt_queue(zq, zc) { 1345 if (card == AP_QID_CARD(zq->queue->qid) && 1346 queue == AP_QID_QUEUE(zq->queue->qid)) { 1347 devstat->hwtype = zc->card->ap_dev.device_type; 1348 devstat->functions = zc->card->hwinfo.fac >> 26; 1349 devstat->qid = zq->queue->qid; 1350 devstat->online = zq->online ? 0x01 : 0x00; 1351 spin_unlock(&zcrypt_list_lock); 1352 return 0; 1353 } 1354 } 1355 } 1356 spin_unlock(&zcrypt_list_lock); 1357 1358 return -ENODEV; 1359 } 1360 EXPORT_SYMBOL(zcrypt_device_status_ext); 1361 1362 static void zcrypt_status_mask(char status[], size_t max_adapters) 1363 { 1364 struct zcrypt_card *zc; 1365 struct zcrypt_queue *zq; 1366 int card; 1367 1368 memset(status, 0, max_adapters); 1369 spin_lock(&zcrypt_list_lock); 1370 for_each_zcrypt_card(zc) { 1371 for_each_zcrypt_queue(zq, zc) { 1372 card = AP_QID_CARD(zq->queue->qid); 1373 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index || 1374 card >= max_adapters) 1375 continue; 1376 status[card] = zc->online ? zc->user_space_type : 0x0d; 1377 } 1378 } 1379 spin_unlock(&zcrypt_list_lock); 1380 } 1381 1382 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters) 1383 { 1384 struct zcrypt_card *zc; 1385 struct zcrypt_queue *zq; 1386 int card; 1387 1388 memset(qdepth, 0, max_adapters); 1389 spin_lock(&zcrypt_list_lock); 1390 local_bh_disable(); 1391 for_each_zcrypt_card(zc) { 1392 for_each_zcrypt_queue(zq, zc) { 1393 card = AP_QID_CARD(zq->queue->qid); 1394 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index || 1395 card >= max_adapters) 1396 continue; 1397 spin_lock(&zq->queue->lock); 1398 qdepth[card] = 1399 zq->queue->pendingq_count + 1400 zq->queue->requestq_count; 1401 spin_unlock(&zq->queue->lock); 1402 } 1403 } 1404 local_bh_enable(); 1405 spin_unlock(&zcrypt_list_lock); 1406 } 1407 1408 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters) 1409 { 1410 struct zcrypt_card *zc; 1411 struct zcrypt_queue *zq; 1412 int card; 1413 u64 cnt; 1414 1415 memset(reqcnt, 0, sizeof(int) * max_adapters); 1416 spin_lock(&zcrypt_list_lock); 1417 local_bh_disable(); 1418 for_each_zcrypt_card(zc) { 1419 for_each_zcrypt_queue(zq, zc) { 1420 card = AP_QID_CARD(zq->queue->qid); 1421 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index || 1422 card >= max_adapters) 1423 continue; 1424 spin_lock(&zq->queue->lock); 1425 cnt = zq->queue->total_request_count; 1426 spin_unlock(&zq->queue->lock); 1427 reqcnt[card] = (cnt < UINT_MAX) ? (u32)cnt : UINT_MAX; 1428 } 1429 } 1430 local_bh_enable(); 1431 spin_unlock(&zcrypt_list_lock); 1432 } 1433 1434 static int zcrypt_pendingq_count(void) 1435 { 1436 struct zcrypt_card *zc; 1437 struct zcrypt_queue *zq; 1438 int pendingq_count; 1439 1440 pendingq_count = 0; 1441 spin_lock(&zcrypt_list_lock); 1442 local_bh_disable(); 1443 for_each_zcrypt_card(zc) { 1444 for_each_zcrypt_queue(zq, zc) { 1445 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) 1446 continue; 1447 spin_lock(&zq->queue->lock); 1448 pendingq_count += zq->queue->pendingq_count; 1449 spin_unlock(&zq->queue->lock); 1450 } 1451 } 1452 local_bh_enable(); 1453 spin_unlock(&zcrypt_list_lock); 1454 return pendingq_count; 1455 } 1456 1457 static int zcrypt_requestq_count(void) 1458 { 1459 struct zcrypt_card *zc; 1460 struct zcrypt_queue *zq; 1461 int requestq_count; 1462 1463 requestq_count = 0; 1464 spin_lock(&zcrypt_list_lock); 1465 local_bh_disable(); 1466 for_each_zcrypt_card(zc) { 1467 for_each_zcrypt_queue(zq, zc) { 1468 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index) 1469 continue; 1470 spin_lock(&zq->queue->lock); 1471 requestq_count += zq->queue->requestq_count; 1472 spin_unlock(&zq->queue->lock); 1473 } 1474 } 1475 local_bh_enable(); 1476 spin_unlock(&zcrypt_list_lock); 1477 return requestq_count; 1478 } 1479 1480 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg) 1481 { 1482 int rc; 1483 struct zcrypt_track tr; 1484 struct ica_rsa_modexpo mex; 1485 struct ica_rsa_modexpo __user *umex = (void __user *)arg; 1486 1487 memset(&tr, 0, sizeof(tr)); 1488 if (copy_from_user(&mex, umex, sizeof(mex))) 1489 return -EFAULT; 1490 1491 do { 1492 rc = zcrypt_rsa_modexpo(perms, &tr, &mex); 1493 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1494 1495 /* on ENODEV failure: retry once again after a requested rescan */ 1496 if (rc == -ENODEV && zcrypt_process_rescan()) 1497 do { 1498 rc = zcrypt_rsa_modexpo(perms, &tr, &mex); 1499 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1500 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1501 rc = -EIO; 1502 if (rc) { 1503 pr_debug("ioctl ICARSAMODEXPO rc=%d\n", rc); 1504 return rc; 1505 } 1506 return put_user(mex.outputdatalength, &umex->outputdatalength); 1507 } 1508 1509 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg) 1510 { 1511 int rc; 1512 struct zcrypt_track tr; 1513 struct ica_rsa_modexpo_crt crt; 1514 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *)arg; 1515 1516 memset(&tr, 0, sizeof(tr)); 1517 if (copy_from_user(&crt, ucrt, sizeof(crt))) 1518 return -EFAULT; 1519 1520 do { 1521 rc = zcrypt_rsa_crt(perms, &tr, &crt); 1522 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1523 1524 /* on ENODEV failure: retry once again after a requested rescan */ 1525 if (rc == -ENODEV && zcrypt_process_rescan()) 1526 do { 1527 rc = zcrypt_rsa_crt(perms, &tr, &crt); 1528 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1529 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1530 rc = -EIO; 1531 if (rc) { 1532 pr_debug("ioctl ICARSACRT rc=%d\n", rc); 1533 return rc; 1534 } 1535 return put_user(crt.outputdatalength, &ucrt->outputdatalength); 1536 } 1537 1538 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg) 1539 { 1540 int rc; 1541 struct ica_xcRB xcrb; 1542 struct zcrypt_track tr; 1543 u32 xflags = ZCRYPT_XFLAG_USERSPACE; 1544 struct ica_xcRB __user *uxcrb = (void __user *)arg; 1545 1546 memset(&tr, 0, sizeof(tr)); 1547 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb))) 1548 return -EFAULT; 1549 1550 do { 1551 rc = _zcrypt_send_cprb(xflags, perms, &tr, &xcrb); 1552 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1553 1554 /* on ENODEV failure: retry once again after a requested rescan */ 1555 if (rc == -ENODEV && zcrypt_process_rescan()) 1556 do { 1557 rc = _zcrypt_send_cprb(xflags, perms, &tr, &xcrb); 1558 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1559 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1560 rc = -EIO; 1561 if (rc) 1562 pr_debug("ioctl ZSENDCPRB rc=%d status=0x%x\n", 1563 rc, xcrb.status); 1564 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb))) 1565 return -EFAULT; 1566 return rc; 1567 } 1568 1569 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg) 1570 { 1571 int rc; 1572 struct ep11_urb xcrb; 1573 struct zcrypt_track tr; 1574 u32 xflags = ZCRYPT_XFLAG_USERSPACE; 1575 struct ep11_urb __user *uxcrb = (void __user *)arg; 1576 1577 memset(&tr, 0, sizeof(tr)); 1578 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb))) 1579 return -EFAULT; 1580 1581 do { 1582 rc = _zcrypt_send_ep11_cprb(xflags, perms, &tr, &xcrb); 1583 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1584 1585 /* on ENODEV failure: retry once again after a requested rescan */ 1586 if (rc == -ENODEV && zcrypt_process_rescan()) 1587 do { 1588 rc = _zcrypt_send_ep11_cprb(xflags, perms, &tr, &xcrb); 1589 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX); 1590 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX) 1591 rc = -EIO; 1592 if (rc) 1593 pr_debug("ioctl ZSENDEP11CPRB rc=%d\n", rc); 1594 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb))) 1595 return -EFAULT; 1596 return rc; 1597 } 1598 1599 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, 1600 unsigned long arg) 1601 { 1602 int rc; 1603 struct ap_perms *perms = 1604 (struct ap_perms *)filp->private_data; 1605 1606 rc = zcrypt_check_ioctl(perms, cmd); 1607 if (rc) 1608 return rc; 1609 1610 switch (cmd) { 1611 case ICARSAMODEXPO: 1612 return icarsamodexpo_ioctl(perms, arg); 1613 case ICARSACRT: 1614 return icarsacrt_ioctl(perms, arg); 1615 case ZSECSENDCPRB: 1616 return zsecsendcprb_ioctl(perms, arg); 1617 case ZSENDEP11CPRB: 1618 return zsendep11cprb_ioctl(perms, arg); 1619 case ZCRYPT_DEVICE_STATUS: { 1620 struct zcrypt_device_status_ext *device_status; 1621 size_t total_size = MAX_ZDEV_ENTRIES_EXT 1622 * sizeof(struct zcrypt_device_status_ext); 1623 1624 device_status = kvzalloc_objs(struct zcrypt_device_status_ext, 1625 MAX_ZDEV_ENTRIES_EXT); 1626 if (!device_status) 1627 return -ENOMEM; 1628 zcrypt_device_status_mask_ext(device_status, 1629 MAX_ZDEV_CARDIDS_EXT, 1630 MAX_ZDEV_DOMAINS_EXT); 1631 if (copy_to_user((char __user *)arg, device_status, 1632 total_size)) 1633 rc = -EFAULT; 1634 kvfree(device_status); 1635 return rc; 1636 } 1637 case ZCRYPT_STATUS_MASK: { 1638 char status[AP_DEVICES]; 1639 1640 zcrypt_status_mask(status, AP_DEVICES); 1641 if (copy_to_user((char __user *)arg, status, sizeof(status))) 1642 return -EFAULT; 1643 return 0; 1644 } 1645 case ZCRYPT_QDEPTH_MASK: { 1646 char qdepth[AP_DEVICES]; 1647 1648 zcrypt_qdepth_mask(qdepth, AP_DEVICES); 1649 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth))) 1650 return -EFAULT; 1651 return 0; 1652 } 1653 case ZCRYPT_PERDEV_REQCNT: { 1654 u32 *reqcnt; 1655 1656 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL); 1657 if (!reqcnt) 1658 return -ENOMEM; 1659 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES); 1660 if (copy_to_user((int __user *)arg, reqcnt, 1661 sizeof(u32) * AP_DEVICES)) 1662 rc = -EFAULT; 1663 kfree(reqcnt); 1664 return rc; 1665 } 1666 case Z90STAT_REQUESTQ_COUNT: 1667 return put_user(zcrypt_requestq_count(), (int __user *)arg); 1668 case Z90STAT_PENDINGQ_COUNT: 1669 return put_user(zcrypt_pendingq_count(), (int __user *)arg); 1670 case Z90STAT_TOTALOPEN_COUNT: 1671 return put_user(atomic_read(&zcrypt_open_count), 1672 (int __user *)arg); 1673 case Z90STAT_DOMAIN_INDEX: 1674 return put_user(ap_domain_index, (int __user *)arg); 1675 /* 1676 * Deprecated ioctls 1677 */ 1678 case ZDEVICESTATUS: { 1679 /* the old ioctl supports only 64 adapters */ 1680 struct zcrypt_device_status *device_status; 1681 size_t total_size = MAX_ZDEV_ENTRIES 1682 * sizeof(struct zcrypt_device_status); 1683 1684 device_status = kzalloc(total_size, GFP_KERNEL); 1685 if (!device_status) 1686 return -ENOMEM; 1687 zcrypt_device_status_mask(device_status); 1688 if (copy_to_user((char __user *)arg, device_status, 1689 total_size)) 1690 rc = -EFAULT; 1691 kfree(device_status); 1692 return rc; 1693 } 1694 case Z90STAT_STATUS_MASK: { 1695 /* the old ioctl supports only 64 adapters */ 1696 char status[MAX_ZDEV_CARDIDS]; 1697 1698 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS); 1699 if (copy_to_user((char __user *)arg, status, sizeof(status))) 1700 return -EFAULT; 1701 return 0; 1702 } 1703 case Z90STAT_QDEPTH_MASK: { 1704 /* the old ioctl supports only 64 adapters */ 1705 char qdepth[MAX_ZDEV_CARDIDS]; 1706 1707 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS); 1708 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth))) 1709 return -EFAULT; 1710 return 0; 1711 } 1712 case Z90STAT_PERDEV_REQCNT: { 1713 /* the old ioctl supports only 64 adapters */ 1714 u32 reqcnt[MAX_ZDEV_CARDIDS]; 1715 1716 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS); 1717 if (copy_to_user((int __user *)arg, reqcnt, sizeof(reqcnt))) 1718 return -EFAULT; 1719 return 0; 1720 } 1721 /* unknown ioctl number */ 1722 default: 1723 pr_debug("unknown ioctl 0x%08x\n", cmd); 1724 return -ENOIOCTLCMD; 1725 } 1726 } 1727 1728 /* 1729 * Misc device file operations. 1730 */ 1731 static const struct file_operations zcrypt_fops = { 1732 .owner = THIS_MODULE, 1733 .read = zcrypt_read, 1734 .write = zcrypt_write, 1735 .unlocked_ioctl = zcrypt_unlocked_ioctl, 1736 .open = zcrypt_open, 1737 .release = zcrypt_release, 1738 }; 1739 1740 /* 1741 * Misc device. 1742 */ 1743 static struct miscdevice zcrypt_misc_device = { 1744 .minor = MISC_DYNAMIC_MINOR, 1745 .name = "z90crypt", 1746 .fops = &zcrypt_fops, 1747 }; 1748 1749 static int zcrypt_rng_device_count; 1750 static u32 *zcrypt_rng_buffer; 1751 static int zcrypt_rng_buffer_index; 1752 static DEFINE_MUTEX(zcrypt_rng_mutex); 1753 1754 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data) 1755 { 1756 int rc; 1757 1758 /* 1759 * We don't need locking here because the RNG API guarantees serialized 1760 * read method calls. 1761 */ 1762 if (zcrypt_rng_buffer_index == 0) { 1763 rc = zcrypt_rng((char *)zcrypt_rng_buffer); 1764 /* on ENODEV failure: retry once again after an AP bus rescan */ 1765 if (rc == -ENODEV && zcrypt_process_rescan()) 1766 rc = zcrypt_rng((char *)zcrypt_rng_buffer); 1767 if (rc < 0) 1768 return -EIO; 1769 zcrypt_rng_buffer_index = rc / sizeof(*data); 1770 } 1771 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index]; 1772 return sizeof(*data); 1773 } 1774 1775 static struct hwrng zcrypt_rng_dev = { 1776 .name = "zcrypt", 1777 .data_read = zcrypt_rng_data_read, 1778 .quality = 990, 1779 }; 1780 1781 int zcrypt_rng_device_add(void) 1782 { 1783 int rc = 0; 1784 1785 mutex_lock(&zcrypt_rng_mutex); 1786 if (zcrypt_rng_device_count == 0) { 1787 zcrypt_rng_buffer = kzalloc(PAGE_SIZE, GFP_KERNEL); 1788 if (!zcrypt_rng_buffer) { 1789 rc = -ENOMEM; 1790 goto out; 1791 } 1792 zcrypt_rng_buffer_index = 0; 1793 rc = hwrng_register(&zcrypt_rng_dev); 1794 if (rc) 1795 goto out_free; 1796 zcrypt_rng_device_count = 1; 1797 } else { 1798 zcrypt_rng_device_count++; 1799 } 1800 mutex_unlock(&zcrypt_rng_mutex); 1801 return 0; 1802 1803 out_free: 1804 kfree(zcrypt_rng_buffer); 1805 out: 1806 mutex_unlock(&zcrypt_rng_mutex); 1807 return rc; 1808 } 1809 1810 void zcrypt_rng_device_remove(void) 1811 { 1812 mutex_lock(&zcrypt_rng_mutex); 1813 zcrypt_rng_device_count--; 1814 if (zcrypt_rng_device_count == 0) { 1815 hwrng_unregister(&zcrypt_rng_dev); 1816 kfree(zcrypt_rng_buffer); 1817 } 1818 mutex_unlock(&zcrypt_rng_mutex); 1819 } 1820 1821 /* 1822 * Wait until the zcrypt api is operational. 1823 * The AP bus scan and the binding of ap devices to device drivers is 1824 * an asynchronous job. This function waits until these initial jobs 1825 * are done and so the zcrypt api should be ready to serve crypto 1826 * requests - if there are resources available. The function uses an 1827 * internal timeout of 30s. The very first caller will either wait for 1828 * ap bus bindings complete or the timeout happens. This state will be 1829 * remembered for further callers which will only be blocked until a 1830 * decision is made (timeout or bindings complete). 1831 * On timeout -ETIME is returned, on success the return value is 0. 1832 */ 1833 int zcrypt_wait_api_operational(void) 1834 { 1835 static DEFINE_MUTEX(zcrypt_wait_api_lock); 1836 static int zcrypt_wait_api_state; 1837 int rc; 1838 1839 rc = mutex_lock_interruptible(&zcrypt_wait_api_lock); 1840 if (rc) 1841 return rc; 1842 1843 switch (zcrypt_wait_api_state) { 1844 case 0: 1845 /* initial state, invoke wait for the ap bus complete */ 1846 rc = ap_wait_apqn_bindings_complete( 1847 msecs_to_jiffies(ZCRYPT_WAIT_BINDINGS_COMPLETE_MS)); 1848 switch (rc) { 1849 case 0: 1850 /* ap bus bindings are complete */ 1851 zcrypt_wait_api_state = 1; 1852 break; 1853 case -EINTR: 1854 /* interrupted, go back to caller */ 1855 break; 1856 case -ETIME: 1857 /* timeout */ 1858 ZCRYPT_DBF_WARN("%s ap_wait_init_apqn_bindings_complete()=ETIME\n", 1859 __func__); 1860 zcrypt_wait_api_state = -ETIME; 1861 break; 1862 default: 1863 /* other failure */ 1864 pr_debug("ap_wait_init_apqn_bindings_complete()=%d\n", rc); 1865 break; 1866 } 1867 break; 1868 case 1: 1869 /* a previous caller already found ap bus bindings complete */ 1870 rc = 0; 1871 break; 1872 default: 1873 /* a previous caller had timeout or other failure */ 1874 rc = zcrypt_wait_api_state; 1875 break; 1876 } 1877 1878 mutex_unlock(&zcrypt_wait_api_lock); 1879 1880 return rc; 1881 } 1882 EXPORT_SYMBOL(zcrypt_wait_api_operational); 1883 1884 int __init zcrypt_debug_init(void) 1885 { 1886 zcrypt_dbf_info = debug_register("zcrypt", 2, 1, 1887 ZCRYPT_DBF_MAX_SPRINTF_ARGS * sizeof(long)); 1888 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view); 1889 debug_set_level(zcrypt_dbf_info, DBF_ERR); 1890 1891 return 0; 1892 } 1893 1894 void zcrypt_debug_exit(void) 1895 { 1896 debug_unregister(zcrypt_dbf_info); 1897 } 1898 1899 static int __init zcdn_init(void) 1900 { 1901 int rc; 1902 1903 /* create a new class 'zcrypt' */ 1904 rc = class_register(&zcrypt_class); 1905 if (rc) 1906 goto out_class_register_failed; 1907 1908 /* alloc device minor range */ 1909 rc = alloc_chrdev_region(&zcrypt_devt, 1910 0, ZCRYPT_MAX_MINOR_NODES, 1911 ZCRYPT_NAME); 1912 if (rc) 1913 goto out_alloc_chrdev_failed; 1914 1915 cdev_init(&zcrypt_cdev, &zcrypt_fops); 1916 zcrypt_cdev.owner = THIS_MODULE; 1917 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES); 1918 if (rc) 1919 goto out_cdev_add_failed; 1920 1921 /* need some class specific sysfs attributes */ 1922 rc = class_create_file(&zcrypt_class, &class_attr_zcdn_create); 1923 if (rc) 1924 goto out_class_create_file_1_failed; 1925 rc = class_create_file(&zcrypt_class, &class_attr_zcdn_destroy); 1926 if (rc) 1927 goto out_class_create_file_2_failed; 1928 1929 return 0; 1930 1931 out_class_create_file_2_failed: 1932 class_remove_file(&zcrypt_class, &class_attr_zcdn_create); 1933 out_class_create_file_1_failed: 1934 cdev_del(&zcrypt_cdev); 1935 out_cdev_add_failed: 1936 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES); 1937 out_alloc_chrdev_failed: 1938 class_unregister(&zcrypt_class); 1939 out_class_register_failed: 1940 return rc; 1941 } 1942 1943 static void zcdn_exit(void) 1944 { 1945 class_remove_file(&zcrypt_class, &class_attr_zcdn_create); 1946 class_remove_file(&zcrypt_class, &class_attr_zcdn_destroy); 1947 zcdn_destroy_all(); 1948 cdev_del(&zcrypt_cdev); 1949 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES); 1950 class_unregister(&zcrypt_class); 1951 } 1952 1953 /* 1954 * zcrypt_api_init(): Module initialization. 1955 * 1956 * The module initialization code. 1957 */ 1958 int __init zcrypt_api_init(void) 1959 { 1960 int rc; 1961 1962 /* make sure the mempool threshold is >= 1 */ 1963 if (zcrypt_mempool_threshold < 1) { 1964 rc = -EINVAL; 1965 goto out; 1966 } 1967 1968 rc = zcrypt_debug_init(); 1969 if (rc) 1970 goto out; 1971 1972 rc = zcdn_init(); 1973 if (rc) 1974 goto out_zcdn_init_failed; 1975 1976 rc = zcrypt_ccamisc_init(); 1977 if (rc) 1978 goto out_ccamisc_init_failed; 1979 1980 rc = zcrypt_ep11misc_init(); 1981 if (rc) 1982 goto out_ep11misc_init_failed; 1983 1984 /* Register the request sprayer. */ 1985 rc = misc_register(&zcrypt_misc_device); 1986 if (rc < 0) 1987 goto out_misc_register_failed; 1988 1989 zcrypt_msgtype6_init(); 1990 zcrypt_msgtype50_init(); 1991 1992 return 0; 1993 1994 out_misc_register_failed: 1995 zcrypt_ep11misc_exit(); 1996 out_ep11misc_init_failed: 1997 zcrypt_ccamisc_exit(); 1998 out_ccamisc_init_failed: 1999 zcdn_exit(); 2000 out_zcdn_init_failed: 2001 zcrypt_debug_exit(); 2002 out: 2003 return rc; 2004 } 2005 2006 /* 2007 * zcrypt_api_exit(): Module termination. 2008 * 2009 * The module termination code. 2010 */ 2011 void __exit zcrypt_api_exit(void) 2012 { 2013 zcdn_exit(); 2014 misc_deregister(&zcrypt_misc_device); 2015 zcrypt_msgtype6_exit(); 2016 zcrypt_msgtype50_exit(); 2017 zcrypt_ccamisc_exit(); 2018 zcrypt_ep11misc_exit(); 2019 zcrypt_debug_exit(); 2020 } 2021 2022 module_init(zcrypt_api_init); 2023 module_exit(zcrypt_api_exit); 2024