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