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1/*
2 * linux/drivers/s390/crypto/zcrypt_api.c
3 *
4 * zcrypt 2.1.0
5 *
6 * Copyright (C) 2001, 2006 IBM Corporation
7 * Author(s): Robert Burroughs
8 * Eric Rossman (edrossma@us.ibm.com)
9 * Cornelia Huck <cornelia.huck@de.ibm.com>
10 *
11 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
12 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 * Ralph Wuerthner <rwuerthn@de.ibm.com>
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2, or (at your option)
18 * any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 */
29
30#include <linux/module.h>
31#include <linux/init.h>
32#include <linux/interrupt.h>
33#include <linux/miscdevice.h>
34#include <linux/fs.h>
35#include <linux/proc_fs.h>
36#include <linux/seq_file.h>
37#include <linux/compat.h>
38#include <linux/slab.h>
39#include <linux/atomic.h>
40#include <asm/uaccess.h>
41#include <linux/hw_random.h>
42
43#include "zcrypt_api.h"
44
45/*
46 * Module description.
47 */
48MODULE_AUTHOR("IBM Corporation");
49MODULE_DESCRIPTION("Cryptographic Coprocessor interface, "
50 "Copyright 2001, 2006 IBM Corporation");
51MODULE_LICENSE("GPL");
52
53static DEFINE_SPINLOCK(zcrypt_device_lock);
54static LIST_HEAD(zcrypt_device_list);
55static int zcrypt_device_count = 0;
56static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
57
58static int zcrypt_rng_device_add(void);
59static void zcrypt_rng_device_remove(void);
60
61/*
62 * Device attributes common for all crypto devices.
63 */
64static ssize_t zcrypt_type_show(struct device *dev,
65 struct device_attribute *attr, char *buf)
66{
67 struct zcrypt_device *zdev = to_ap_dev(dev)->private;
68 return snprintf(buf, PAGE_SIZE, "%s\n", zdev->type_string);
69}
70
71static DEVICE_ATTR(type, 0444, zcrypt_type_show, NULL);
72
73static ssize_t zcrypt_online_show(struct device *dev,
74 struct device_attribute *attr, char *buf)
75{
76 struct zcrypt_device *zdev = to_ap_dev(dev)->private;
77 return snprintf(buf, PAGE_SIZE, "%d\n", zdev->online);
78}
79
80static ssize_t zcrypt_online_store(struct device *dev,
81 struct device_attribute *attr,
82 const char *buf, size_t count)
83{
84 struct zcrypt_device *zdev = to_ap_dev(dev)->private;
85 int online;
86
87 if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
88 return -EINVAL;
89 zdev->online = online;
90 if (!online)
91 ap_flush_queue(zdev->ap_dev);
92 return count;
93}
94
95static DEVICE_ATTR(online, 0644, zcrypt_online_show, zcrypt_online_store);
96
97static struct attribute * zcrypt_device_attrs[] = {
98 &dev_attr_type.attr,
99 &dev_attr_online.attr,
100 NULL,
101};
102
103static struct attribute_group zcrypt_device_attr_group = {
104 .attrs = zcrypt_device_attrs,
105};
106
107/**
108 * __zcrypt_increase_preference(): Increase preference of a crypto device.
109 * @zdev: Pointer the crypto device
110 *
111 * Move the device towards the head of the device list.
112 * Need to be called while holding the zcrypt device list lock.
113 * Note: cards with speed_rating of 0 are kept at the end of the list.
114 */
115static void __zcrypt_increase_preference(struct zcrypt_device *zdev)
116{
117 struct zcrypt_device *tmp;
118 struct list_head *l;
119
120 if (zdev->speed_rating == 0)
121 return;
122 for (l = zdev->list.prev; l != &zcrypt_device_list; l = l->prev) {
123 tmp = list_entry(l, struct zcrypt_device, list);
124 if ((tmp->request_count + 1) * tmp->speed_rating <=
125 (zdev->request_count + 1) * zdev->speed_rating &&
126 tmp->speed_rating != 0)
127 break;
128 }
129 if (l == zdev->list.prev)
130 return;
131 /* Move zdev behind l */
132 list_move(&zdev->list, l);
133}
134
135/**
136 * __zcrypt_decrease_preference(): Decrease preference of a crypto device.
137 * @zdev: Pointer to a crypto device.
138 *
139 * Move the device towards the tail of the device list.
140 * Need to be called while holding the zcrypt device list lock.
141 * Note: cards with speed_rating of 0 are kept at the end of the list.
142 */
143static void __zcrypt_decrease_preference(struct zcrypt_device *zdev)
144{
145 struct zcrypt_device *tmp;
146 struct list_head *l;
147
148 if (zdev->speed_rating == 0)
149 return;
150 for (l = zdev->list.next; l != &zcrypt_device_list; l = l->next) {
151 tmp = list_entry(l, struct zcrypt_device, list);
152 if ((tmp->request_count + 1) * tmp->speed_rating >
153 (zdev->request_count + 1) * zdev->speed_rating ||
154 tmp->speed_rating == 0)
155 break;
156 }
157 if (l == zdev->list.next)
158 return;
159 /* Move zdev before l */
160 list_move_tail(&zdev->list, l);
161}
162
163static void zcrypt_device_release(struct kref *kref)
164{
165 struct zcrypt_device *zdev =
166 container_of(kref, struct zcrypt_device, refcount);
167 zcrypt_device_free(zdev);
168}
169
170void zcrypt_device_get(struct zcrypt_device *zdev)
171{
172 kref_get(&zdev->refcount);
173}
174EXPORT_SYMBOL(zcrypt_device_get);
175
176int zcrypt_device_put(struct zcrypt_device *zdev)
177{
178 return kref_put(&zdev->refcount, zcrypt_device_release);
179}
180EXPORT_SYMBOL(zcrypt_device_put);
181
182struct zcrypt_device *zcrypt_device_alloc(size_t max_response_size)
183{
184 struct zcrypt_device *zdev;
185
186 zdev = kzalloc(sizeof(struct zcrypt_device), GFP_KERNEL);
187 if (!zdev)
188 return NULL;
189 zdev->reply.message = kmalloc(max_response_size, GFP_KERNEL);
190 if (!zdev->reply.message)
191 goto out_free;
192 zdev->reply.length = max_response_size;
193 spin_lock_init(&zdev->lock);
194 INIT_LIST_HEAD(&zdev->list);
195 return zdev;
196
197out_free:
198 kfree(zdev);
199 return NULL;
200}
201EXPORT_SYMBOL(zcrypt_device_alloc);
202
203void zcrypt_device_free(struct zcrypt_device *zdev)
204{
205 kfree(zdev->reply.message);
206 kfree(zdev);
207}
208EXPORT_SYMBOL(zcrypt_device_free);
209
210/**
211 * zcrypt_device_register() - Register a crypto device.
212 * @zdev: Pointer to a crypto device
213 *
214 * Register a crypto device. Returns 0 if successful.
215 */
216int zcrypt_device_register(struct zcrypt_device *zdev)
217{
218 int rc;
219
220 rc = sysfs_create_group(&zdev->ap_dev->device.kobj,
221 &zcrypt_device_attr_group);
222 if (rc)
223 goto out;
224 get_device(&zdev->ap_dev->device);
225 kref_init(&zdev->refcount);
226 spin_lock_bh(&zcrypt_device_lock);
227 zdev->online = 1; /* New devices are online by default. */
228 list_add_tail(&zdev->list, &zcrypt_device_list);
229 __zcrypt_increase_preference(zdev);
230 zcrypt_device_count++;
231 spin_unlock_bh(&zcrypt_device_lock);
232 if (zdev->ops->rng) {
233 rc = zcrypt_rng_device_add();
234 if (rc)
235 goto out_unregister;
236 }
237 return 0;
238
239out_unregister:
240 spin_lock_bh(&zcrypt_device_lock);
241 zcrypt_device_count--;
242 list_del_init(&zdev->list);
243 spin_unlock_bh(&zcrypt_device_lock);
244 sysfs_remove_group(&zdev->ap_dev->device.kobj,
245 &zcrypt_device_attr_group);
246 put_device(&zdev->ap_dev->device);
247 zcrypt_device_put(zdev);
248out:
249 return rc;
250}
251EXPORT_SYMBOL(zcrypt_device_register);
252
253/**
254 * zcrypt_device_unregister(): Unregister a crypto device.
255 * @zdev: Pointer to crypto device
256 *
257 * Unregister a crypto device.
258 */
259void zcrypt_device_unregister(struct zcrypt_device *zdev)
260{
261 if (zdev->ops->rng)
262 zcrypt_rng_device_remove();
263 spin_lock_bh(&zcrypt_device_lock);
264 zcrypt_device_count--;
265 list_del_init(&zdev->list);
266 spin_unlock_bh(&zcrypt_device_lock);
267 sysfs_remove_group(&zdev->ap_dev->device.kobj,
268 &zcrypt_device_attr_group);
269 put_device(&zdev->ap_dev->device);
270 zcrypt_device_put(zdev);
271}
272EXPORT_SYMBOL(zcrypt_device_unregister);
273
274/**
275 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
276 *
277 * This function is not supported beyond zcrypt 1.3.1.
278 */
279static ssize_t zcrypt_read(struct file *filp, char __user *buf,
280 size_t count, loff_t *f_pos)
281{
282 return -EPERM;
283}
284
285/**
286 * zcrypt_write(): Not allowed.
287 *
288 * Write is is not allowed
289 */
290static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
291 size_t count, loff_t *f_pos)
292{
293 return -EPERM;
294}
295
296/**
297 * zcrypt_open(): Count number of users.
298 *
299 * Device open function to count number of users.
300 */
301static int zcrypt_open(struct inode *inode, struct file *filp)
302{
303 atomic_inc(&zcrypt_open_count);
304 return nonseekable_open(inode, filp);
305}
306
307/**
308 * zcrypt_release(): Count number of users.
309 *
310 * Device close function to count number of users.
311 */
312static int zcrypt_release(struct inode *inode, struct file *filp)
313{
314 atomic_dec(&zcrypt_open_count);
315 return 0;
316}
317
318/*
319 * zcrypt ioctls.
320 */
321static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
322{
323 struct zcrypt_device *zdev;
324 int rc;
325
326 if (mex->outputdatalength < mex->inputdatalength)
327 return -EINVAL;
328 /*
329 * As long as outputdatalength is big enough, we can set the
330 * outputdatalength equal to the inputdatalength, since that is the
331 * number of bytes we will copy in any case
332 */
333 mex->outputdatalength = mex->inputdatalength;
334
335 spin_lock_bh(&zcrypt_device_lock);
336 list_for_each_entry(zdev, &zcrypt_device_list, list) {
337 if (!zdev->online ||
338 !zdev->ops->rsa_modexpo ||
339 zdev->min_mod_size > mex->inputdatalength ||
340 zdev->max_mod_size < mex->inputdatalength)
341 continue;
342 zcrypt_device_get(zdev);
343 get_device(&zdev->ap_dev->device);
344 zdev->request_count++;
345 __zcrypt_decrease_preference(zdev);
346 if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
347 spin_unlock_bh(&zcrypt_device_lock);
348 rc = zdev->ops->rsa_modexpo(zdev, mex);
349 spin_lock_bh(&zcrypt_device_lock);
350 module_put(zdev->ap_dev->drv->driver.owner);
351 }
352 else
353 rc = -EAGAIN;
354 zdev->request_count--;
355 __zcrypt_increase_preference(zdev);
356 put_device(&zdev->ap_dev->device);
357 zcrypt_device_put(zdev);
358 spin_unlock_bh(&zcrypt_device_lock);
359 return rc;
360 }
361 spin_unlock_bh(&zcrypt_device_lock);
362 return -ENODEV;
363}
364
365static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
366{
367 struct zcrypt_device *zdev;
368 unsigned long long z1, z2, z3;
369 int rc, copied;
370
371 if (crt->outputdatalength < crt->inputdatalength ||
372 (crt->inputdatalength & 1))
373 return -EINVAL;
374 /*
375 * As long as outputdatalength is big enough, we can set the
376 * outputdatalength equal to the inputdatalength, since that is the
377 * number of bytes we will copy in any case
378 */
379 crt->outputdatalength = crt->inputdatalength;
380
381 copied = 0;
382 restart:
383 spin_lock_bh(&zcrypt_device_lock);
384 list_for_each_entry(zdev, &zcrypt_device_list, list) {
385 if (!zdev->online ||
386 !zdev->ops->rsa_modexpo_crt ||
387 zdev->min_mod_size > crt->inputdatalength ||
388 zdev->max_mod_size < crt->inputdatalength)
389 continue;
390 if (zdev->short_crt && crt->inputdatalength > 240) {
391 /*
392 * Check inputdata for leading zeros for cards
393 * that can't handle np_prime, bp_key, or
394 * u_mult_inv > 128 bytes.
395 */
396 if (copied == 0) {
397 unsigned int len;
398 spin_unlock_bh(&zcrypt_device_lock);
399 /* len is max 256 / 2 - 120 = 8
400 * For bigger device just assume len of leading
401 * 0s is 8 as stated in the requirements for
402 * ica_rsa_modexpo_crt struct in zcrypt.h.
403 */
404 if (crt->inputdatalength <= 256)
405 len = crt->inputdatalength / 2 - 120;
406 else
407 len = 8;
408 if (len > sizeof(z1))
409 return -EFAULT;
410 z1 = z2 = z3 = 0;
411 if (copy_from_user(&z1, crt->np_prime, len) ||
412 copy_from_user(&z2, crt->bp_key, len) ||
413 copy_from_user(&z3, crt->u_mult_inv, len))
414 return -EFAULT;
415 z1 = z2 = z3 = 0;
416 copied = 1;
417 /*
418 * We have to restart device lookup -
419 * the device list may have changed by now.
420 */
421 goto restart;
422 }
423 if (z1 != 0ULL || z2 != 0ULL || z3 != 0ULL)
424 /* The device can't handle this request. */
425 continue;
426 }
427 zcrypt_device_get(zdev);
428 get_device(&zdev->ap_dev->device);
429 zdev->request_count++;
430 __zcrypt_decrease_preference(zdev);
431 if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
432 spin_unlock_bh(&zcrypt_device_lock);
433 rc = zdev->ops->rsa_modexpo_crt(zdev, crt);
434 spin_lock_bh(&zcrypt_device_lock);
435 module_put(zdev->ap_dev->drv->driver.owner);
436 }
437 else
438 rc = -EAGAIN;
439 zdev->request_count--;
440 __zcrypt_increase_preference(zdev);
441 put_device(&zdev->ap_dev->device);
442 zcrypt_device_put(zdev);
443 spin_unlock_bh(&zcrypt_device_lock);
444 return rc;
445 }
446 spin_unlock_bh(&zcrypt_device_lock);
447 return -ENODEV;
448}
449
450static long zcrypt_send_cprb(struct ica_xcRB *xcRB)
451{
452 struct zcrypt_device *zdev;
453 int rc;
454
455 spin_lock_bh(&zcrypt_device_lock);
456 list_for_each_entry(zdev, &zcrypt_device_list, list) {
457 if (!zdev->online || !zdev->ops->send_cprb ||
458 (xcRB->user_defined != AUTOSELECT &&
459 AP_QID_DEVICE(zdev->ap_dev->qid) != xcRB->user_defined)
460 )
461 continue;
462 zcrypt_device_get(zdev);
463 get_device(&zdev->ap_dev->device);
464 zdev->request_count++;
465 __zcrypt_decrease_preference(zdev);
466 if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
467 spin_unlock_bh(&zcrypt_device_lock);
468 rc = zdev->ops->send_cprb(zdev, xcRB);
469 spin_lock_bh(&zcrypt_device_lock);
470 module_put(zdev->ap_dev->drv->driver.owner);
471 }
472 else
473 rc = -EAGAIN;
474 zdev->request_count--;
475 __zcrypt_increase_preference(zdev);
476 put_device(&zdev->ap_dev->device);
477 zcrypt_device_put(zdev);
478 spin_unlock_bh(&zcrypt_device_lock);
479 return rc;
480 }
481 spin_unlock_bh(&zcrypt_device_lock);
482 return -ENODEV;
483}
484
485static long zcrypt_rng(char *buffer)
486{
487 struct zcrypt_device *zdev;
488 int rc;
489
490 spin_lock_bh(&zcrypt_device_lock);
491 list_for_each_entry(zdev, &zcrypt_device_list, list) {
492 if (!zdev->online || !zdev->ops->rng)
493 continue;
494 zcrypt_device_get(zdev);
495 get_device(&zdev->ap_dev->device);
496 zdev->request_count++;
497 __zcrypt_decrease_preference(zdev);
498 if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
499 spin_unlock_bh(&zcrypt_device_lock);
500 rc = zdev->ops->rng(zdev, buffer);
501 spin_lock_bh(&zcrypt_device_lock);
502 module_put(zdev->ap_dev->drv->driver.owner);
503 } else
504 rc = -EAGAIN;
505 zdev->request_count--;
506 __zcrypt_increase_preference(zdev);
507 put_device(&zdev->ap_dev->device);
508 zcrypt_device_put(zdev);
509 spin_unlock_bh(&zcrypt_device_lock);
510 return rc;
511 }
512 spin_unlock_bh(&zcrypt_device_lock);
513 return -ENODEV;
514}
515
516static void zcrypt_status_mask(char status[AP_DEVICES])
517{
518 struct zcrypt_device *zdev;
519
520 memset(status, 0, sizeof(char) * AP_DEVICES);
521 spin_lock_bh(&zcrypt_device_lock);
522 list_for_each_entry(zdev, &zcrypt_device_list, list)
523 status[AP_QID_DEVICE(zdev->ap_dev->qid)] =
524 zdev->online ? zdev->user_space_type : 0x0d;
525 spin_unlock_bh(&zcrypt_device_lock);
526}
527
528static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES])
529{
530 struct zcrypt_device *zdev;
531
532 memset(qdepth, 0, sizeof(char) * AP_DEVICES);
533 spin_lock_bh(&zcrypt_device_lock);
534 list_for_each_entry(zdev, &zcrypt_device_list, list) {
535 spin_lock(&zdev->ap_dev->lock);
536 qdepth[AP_QID_DEVICE(zdev->ap_dev->qid)] =
537 zdev->ap_dev->pendingq_count +
538 zdev->ap_dev->requestq_count;
539 spin_unlock(&zdev->ap_dev->lock);
540 }
541 spin_unlock_bh(&zcrypt_device_lock);
542}
543
544static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES])
545{
546 struct zcrypt_device *zdev;
547
548 memset(reqcnt, 0, sizeof(int) * AP_DEVICES);
549 spin_lock_bh(&zcrypt_device_lock);
550 list_for_each_entry(zdev, &zcrypt_device_list, list) {
551 spin_lock(&zdev->ap_dev->lock);
552 reqcnt[AP_QID_DEVICE(zdev->ap_dev->qid)] =
553 zdev->ap_dev->total_request_count;
554 spin_unlock(&zdev->ap_dev->lock);
555 }
556 spin_unlock_bh(&zcrypt_device_lock);
557}
558
559static int zcrypt_pendingq_count(void)
560{
561 struct zcrypt_device *zdev;
562 int pendingq_count = 0;
563
564 spin_lock_bh(&zcrypt_device_lock);
565 list_for_each_entry(zdev, &zcrypt_device_list, list) {
566 spin_lock(&zdev->ap_dev->lock);
567 pendingq_count += zdev->ap_dev->pendingq_count;
568 spin_unlock(&zdev->ap_dev->lock);
569 }
570 spin_unlock_bh(&zcrypt_device_lock);
571 return pendingq_count;
572}
573
574static int zcrypt_requestq_count(void)
575{
576 struct zcrypt_device *zdev;
577 int requestq_count = 0;
578
579 spin_lock_bh(&zcrypt_device_lock);
580 list_for_each_entry(zdev, &zcrypt_device_list, list) {
581 spin_lock(&zdev->ap_dev->lock);
582 requestq_count += zdev->ap_dev->requestq_count;
583 spin_unlock(&zdev->ap_dev->lock);
584 }
585 spin_unlock_bh(&zcrypt_device_lock);
586 return requestq_count;
587}
588
589static int zcrypt_count_type(int type)
590{
591 struct zcrypt_device *zdev;
592 int device_count = 0;
593
594 spin_lock_bh(&zcrypt_device_lock);
595 list_for_each_entry(zdev, &zcrypt_device_list, list)
596 if (zdev->user_space_type == type)
597 device_count++;
598 spin_unlock_bh(&zcrypt_device_lock);
599 return device_count;
600}
601
602/**
603 * zcrypt_ica_status(): Old, depracted combi status call.
604 *
605 * Old, deprecated combi status call.
606 */
607static long zcrypt_ica_status(struct file *filp, unsigned long arg)
608{
609 struct ica_z90_status *pstat;
610 int ret;
611
612 pstat = kzalloc(sizeof(*pstat), GFP_KERNEL);
613 if (!pstat)
614 return -ENOMEM;
615 pstat->totalcount = zcrypt_device_count;
616 pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA);
617 pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC);
618 pstat->requestqWaitCount = zcrypt_requestq_count();
619 pstat->pendingqWaitCount = zcrypt_pendingq_count();
620 pstat->totalOpenCount = atomic_read(&zcrypt_open_count);
621 pstat->cryptoDomain = ap_domain_index;
622 zcrypt_status_mask(pstat->status);
623 zcrypt_qdepth_mask(pstat->qdepth);
624 ret = 0;
625 if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat)))
626 ret = -EFAULT;
627 kfree(pstat);
628 return ret;
629}
630
631static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
632 unsigned long arg)
633{
634 int rc;
635
636 switch (cmd) {
637 case ICARSAMODEXPO: {
638 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
639 struct ica_rsa_modexpo mex;
640 if (copy_from_user(&mex, umex, sizeof(mex)))
641 return -EFAULT;
642 do {
643 rc = zcrypt_rsa_modexpo(&mex);
644 } while (rc == -EAGAIN);
645 if (rc)
646 return rc;
647 return put_user(mex.outputdatalength, &umex->outputdatalength);
648 }
649 case ICARSACRT: {
650 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
651 struct ica_rsa_modexpo_crt crt;
652 if (copy_from_user(&crt, ucrt, sizeof(crt)))
653 return -EFAULT;
654 do {
655 rc = zcrypt_rsa_crt(&crt);
656 } while (rc == -EAGAIN);
657 if (rc)
658 return rc;
659 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
660 }
661 case ZSECSENDCPRB: {
662 struct ica_xcRB __user *uxcRB = (void __user *) arg;
663 struct ica_xcRB xcRB;
664 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
665 return -EFAULT;
666 do {
667 rc = zcrypt_send_cprb(&xcRB);
668 } while (rc == -EAGAIN);
669 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
670 return -EFAULT;
671 return rc;
672 }
673 case Z90STAT_STATUS_MASK: {
674 char status[AP_DEVICES];
675 zcrypt_status_mask(status);
676 if (copy_to_user((char __user *) arg, status,
677 sizeof(char) * AP_DEVICES))
678 return -EFAULT;
679 return 0;
680 }
681 case Z90STAT_QDEPTH_MASK: {
682 char qdepth[AP_DEVICES];
683 zcrypt_qdepth_mask(qdepth);
684 if (copy_to_user((char __user *) arg, qdepth,
685 sizeof(char) * AP_DEVICES))
686 return -EFAULT;
687 return 0;
688 }
689 case Z90STAT_PERDEV_REQCNT: {
690 int reqcnt[AP_DEVICES];
691 zcrypt_perdev_reqcnt(reqcnt);
692 if (copy_to_user((int __user *) arg, reqcnt,
693 sizeof(int) * AP_DEVICES))
694 return -EFAULT;
695 return 0;
696 }
697 case Z90STAT_REQUESTQ_COUNT:
698 return put_user(zcrypt_requestq_count(), (int __user *) arg);
699 case Z90STAT_PENDINGQ_COUNT:
700 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
701 case Z90STAT_TOTALOPEN_COUNT:
702 return put_user(atomic_read(&zcrypt_open_count),
703 (int __user *) arg);
704 case Z90STAT_DOMAIN_INDEX:
705 return put_user(ap_domain_index, (int __user *) arg);
706 /*
707 * Deprecated ioctls. Don't add another device count ioctl,
708 * you can count them yourself in the user space with the
709 * output of the Z90STAT_STATUS_MASK ioctl.
710 */
711 case ICAZ90STATUS:
712 return zcrypt_ica_status(filp, arg);
713 case Z90STAT_TOTALCOUNT:
714 return put_user(zcrypt_device_count, (int __user *) arg);
715 case Z90STAT_PCICACOUNT:
716 return put_user(zcrypt_count_type(ZCRYPT_PCICA),
717 (int __user *) arg);
718 case Z90STAT_PCICCCOUNT:
719 return put_user(zcrypt_count_type(ZCRYPT_PCICC),
720 (int __user *) arg);
721 case Z90STAT_PCIXCCMCL2COUNT:
722 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2),
723 (int __user *) arg);
724 case Z90STAT_PCIXCCMCL3COUNT:
725 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
726 (int __user *) arg);
727 case Z90STAT_PCIXCCCOUNT:
728 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) +
729 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
730 (int __user *) arg);
731 case Z90STAT_CEX2CCOUNT:
732 return put_user(zcrypt_count_type(ZCRYPT_CEX2C),
733 (int __user *) arg);
734 case Z90STAT_CEX2ACOUNT:
735 return put_user(zcrypt_count_type(ZCRYPT_CEX2A),
736 (int __user *) arg);
737 default:
738 /* unknown ioctl number */
739 return -ENOIOCTLCMD;
740 }
741}
742
743#ifdef CONFIG_COMPAT
744/*
745 * ioctl32 conversion routines
746 */
747struct compat_ica_rsa_modexpo {
748 compat_uptr_t inputdata;
749 unsigned int inputdatalength;
750 compat_uptr_t outputdata;
751 unsigned int outputdatalength;
752 compat_uptr_t b_key;
753 compat_uptr_t n_modulus;
754};
755
756static long trans_modexpo32(struct file *filp, unsigned int cmd,
757 unsigned long arg)
758{
759 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
760 struct compat_ica_rsa_modexpo mex32;
761 struct ica_rsa_modexpo mex64;
762 long rc;
763
764 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
765 return -EFAULT;
766 mex64.inputdata = compat_ptr(mex32.inputdata);
767 mex64.inputdatalength = mex32.inputdatalength;
768 mex64.outputdata = compat_ptr(mex32.outputdata);
769 mex64.outputdatalength = mex32.outputdatalength;
770 mex64.b_key = compat_ptr(mex32.b_key);
771 mex64.n_modulus = compat_ptr(mex32.n_modulus);
772 do {
773 rc = zcrypt_rsa_modexpo(&mex64);
774 } while (rc == -EAGAIN);
775 if (!rc)
776 rc = put_user(mex64.outputdatalength,
777 &umex32->outputdatalength);
778 return rc;
779}
780
781struct compat_ica_rsa_modexpo_crt {
782 compat_uptr_t inputdata;
783 unsigned int inputdatalength;
784 compat_uptr_t outputdata;
785 unsigned int outputdatalength;
786 compat_uptr_t bp_key;
787 compat_uptr_t bq_key;
788 compat_uptr_t np_prime;
789 compat_uptr_t nq_prime;
790 compat_uptr_t u_mult_inv;
791};
792
793static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
794 unsigned long arg)
795{
796 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
797 struct compat_ica_rsa_modexpo_crt crt32;
798 struct ica_rsa_modexpo_crt crt64;
799 long rc;
800
801 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
802 return -EFAULT;
803 crt64.inputdata = compat_ptr(crt32.inputdata);
804 crt64.inputdatalength = crt32.inputdatalength;
805 crt64.outputdata= compat_ptr(crt32.outputdata);
806 crt64.outputdatalength = crt32.outputdatalength;
807 crt64.bp_key = compat_ptr(crt32.bp_key);
808 crt64.bq_key = compat_ptr(crt32.bq_key);
809 crt64.np_prime = compat_ptr(crt32.np_prime);
810 crt64.nq_prime = compat_ptr(crt32.nq_prime);
811 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
812 do {
813 rc = zcrypt_rsa_crt(&crt64);
814 } while (rc == -EAGAIN);
815 if (!rc)
816 rc = put_user(crt64.outputdatalength,
817 &ucrt32->outputdatalength);
818 return rc;
819}
820
821struct compat_ica_xcRB {
822 unsigned short agent_ID;
823 unsigned int user_defined;
824 unsigned short request_ID;
825 unsigned int request_control_blk_length;
826 unsigned char padding1[16 - sizeof (compat_uptr_t)];
827 compat_uptr_t request_control_blk_addr;
828 unsigned int request_data_length;
829 char padding2[16 - sizeof (compat_uptr_t)];
830 compat_uptr_t request_data_address;
831 unsigned int reply_control_blk_length;
832 char padding3[16 - sizeof (compat_uptr_t)];
833 compat_uptr_t reply_control_blk_addr;
834 unsigned int reply_data_length;
835 char padding4[16 - sizeof (compat_uptr_t)];
836 compat_uptr_t reply_data_addr;
837 unsigned short priority_window;
838 unsigned int status;
839} __attribute__((packed));
840
841static long trans_xcRB32(struct file *filp, unsigned int cmd,
842 unsigned long arg)
843{
844 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
845 struct compat_ica_xcRB xcRB32;
846 struct ica_xcRB xcRB64;
847 long rc;
848
849 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
850 return -EFAULT;
851 xcRB64.agent_ID = xcRB32.agent_ID;
852 xcRB64.user_defined = xcRB32.user_defined;
853 xcRB64.request_ID = xcRB32.request_ID;
854 xcRB64.request_control_blk_length =
855 xcRB32.request_control_blk_length;
856 xcRB64.request_control_blk_addr =
857 compat_ptr(xcRB32.request_control_blk_addr);
858 xcRB64.request_data_length =
859 xcRB32.request_data_length;
860 xcRB64.request_data_address =
861 compat_ptr(xcRB32.request_data_address);
862 xcRB64.reply_control_blk_length =
863 xcRB32.reply_control_blk_length;
864 xcRB64.reply_control_blk_addr =
865 compat_ptr(xcRB32.reply_control_blk_addr);
866 xcRB64.reply_data_length = xcRB32.reply_data_length;
867 xcRB64.reply_data_addr =
868 compat_ptr(xcRB32.reply_data_addr);
869 xcRB64.priority_window = xcRB32.priority_window;
870 xcRB64.status = xcRB32.status;
871 do {
872 rc = zcrypt_send_cprb(&xcRB64);
873 } while (rc == -EAGAIN);
874 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
875 xcRB32.reply_data_length = xcRB64.reply_data_length;
876 xcRB32.status = xcRB64.status;
877 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
878 return -EFAULT;
879 return rc;
880}
881
882static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
883 unsigned long arg)
884{
885 if (cmd == ICARSAMODEXPO)
886 return trans_modexpo32(filp, cmd, arg);
887 if (cmd == ICARSACRT)
888 return trans_modexpo_crt32(filp, cmd, arg);
889 if (cmd == ZSECSENDCPRB)
890 return trans_xcRB32(filp, cmd, arg);
891 return zcrypt_unlocked_ioctl(filp, cmd, arg);
892}
893#endif
894
895/*
896 * Misc device file operations.
897 */
898static const struct file_operations zcrypt_fops = {
899 .owner = THIS_MODULE,
900 .read = zcrypt_read,
901 .write = zcrypt_write,
902 .unlocked_ioctl = zcrypt_unlocked_ioctl,
903#ifdef CONFIG_COMPAT
904 .compat_ioctl = zcrypt_compat_ioctl,
905#endif
906 .open = zcrypt_open,
907 .release = zcrypt_release,
908 .llseek = no_llseek,
909};
910
911/*
912 * Misc device.
913 */
914static struct miscdevice zcrypt_misc_device = {
915 .minor = MISC_DYNAMIC_MINOR,
916 .name = "z90crypt",
917 .fops = &zcrypt_fops,
918};
919
920/*
921 * Deprecated /proc entry support.
922 */
923static struct proc_dir_entry *zcrypt_entry;
924
925static void sprintcl(struct seq_file *m, unsigned char *addr, unsigned int len)
926{
927 int i;
928
929 for (i = 0; i < len; i++)
930 seq_printf(m, "%01x", (unsigned int) addr[i]);
931 seq_putc(m, ' ');
932}
933
934static void sprintrw(struct seq_file *m, unsigned char *addr, unsigned int len)
935{
936 int inl, c, cx;
937
938 seq_printf(m, " ");
939 inl = 0;
940 for (c = 0; c < (len / 16); c++) {
941 sprintcl(m, addr+inl, 16);
942 inl += 16;
943 }
944 cx = len%16;
945 if (cx) {
946 sprintcl(m, addr+inl, cx);
947 inl += cx;
948 }
949 seq_putc(m, '\n');
950}
951
952static void sprinthx(unsigned char *title, struct seq_file *m,
953 unsigned char *addr, unsigned int len)
954{
955 int inl, r, rx;
956
957 seq_printf(m, "\n%s\n", title);
958 inl = 0;
959 for (r = 0; r < (len / 64); r++) {
960 sprintrw(m, addr+inl, 64);
961 inl += 64;
962 }
963 rx = len % 64;
964 if (rx) {
965 sprintrw(m, addr+inl, rx);
966 inl += rx;
967 }
968 seq_putc(m, '\n');
969}
970
971static void sprinthx4(unsigned char *title, struct seq_file *m,
972 unsigned int *array, unsigned int len)
973{
974 int r;
975
976 seq_printf(m, "\n%s\n", title);
977 for (r = 0; r < len; r++) {
978 if ((r % 8) == 0)
979 seq_printf(m, " ");
980 seq_printf(m, "%08X ", array[r]);
981 if ((r % 8) == 7)
982 seq_putc(m, '\n');
983 }
984 seq_putc(m, '\n');
985}
986
987static int zcrypt_proc_show(struct seq_file *m, void *v)
988{
989 char workarea[sizeof(int) * AP_DEVICES];
990
991 seq_printf(m, "\nzcrypt version: %d.%d.%d\n",
992 ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT);
993 seq_printf(m, "Cryptographic domain: %d\n", ap_domain_index);
994 seq_printf(m, "Total device count: %d\n", zcrypt_device_count);
995 seq_printf(m, "PCICA count: %d\n", zcrypt_count_type(ZCRYPT_PCICA));
996 seq_printf(m, "PCICC count: %d\n", zcrypt_count_type(ZCRYPT_PCICC));
997 seq_printf(m, "PCIXCC MCL2 count: %d\n",
998 zcrypt_count_type(ZCRYPT_PCIXCC_MCL2));
999 seq_printf(m, "PCIXCC MCL3 count: %d\n",
1000 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3));
1001 seq_printf(m, "CEX2C count: %d\n", zcrypt_count_type(ZCRYPT_CEX2C));
1002 seq_printf(m, "CEX2A count: %d\n", zcrypt_count_type(ZCRYPT_CEX2A));
1003 seq_printf(m, "CEX3C count: %d\n", zcrypt_count_type(ZCRYPT_CEX3C));
1004 seq_printf(m, "CEX3A count: %d\n", zcrypt_count_type(ZCRYPT_CEX3A));
1005 seq_printf(m, "requestq count: %d\n", zcrypt_requestq_count());
1006 seq_printf(m, "pendingq count: %d\n", zcrypt_pendingq_count());
1007 seq_printf(m, "Total open handles: %d\n\n",
1008 atomic_read(&zcrypt_open_count));
1009 zcrypt_status_mask(workarea);
1010 sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) "
1011 "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A",
1012 m, workarea, AP_DEVICES);
1013 zcrypt_qdepth_mask(workarea);
1014 sprinthx("Waiting work element counts", m, workarea, AP_DEVICES);
1015 zcrypt_perdev_reqcnt((int *) workarea);
1016 sprinthx4("Per-device successfully completed request counts",
1017 m, (unsigned int *) workarea, AP_DEVICES);
1018 return 0;
1019}
1020
1021static int zcrypt_proc_open(struct inode *inode, struct file *file)
1022{
1023 return single_open(file, zcrypt_proc_show, NULL);
1024}
1025
1026static void zcrypt_disable_card(int index)
1027{
1028 struct zcrypt_device *zdev;
1029
1030 spin_lock_bh(&zcrypt_device_lock);
1031 list_for_each_entry(zdev, &zcrypt_device_list, list)
1032 if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) {
1033 zdev->online = 0;
1034 ap_flush_queue(zdev->ap_dev);
1035 break;
1036 }
1037 spin_unlock_bh(&zcrypt_device_lock);
1038}
1039
1040static void zcrypt_enable_card(int index)
1041{
1042 struct zcrypt_device *zdev;
1043
1044 spin_lock_bh(&zcrypt_device_lock);
1045 list_for_each_entry(zdev, &zcrypt_device_list, list)
1046 if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) {
1047 zdev->online = 1;
1048 break;
1049 }
1050 spin_unlock_bh(&zcrypt_device_lock);
1051}
1052
1053static ssize_t zcrypt_proc_write(struct file *file, const char __user *buffer,
1054 size_t count, loff_t *pos)
1055{
1056 unsigned char *lbuf, *ptr;
1057 size_t local_count;
1058 int j;
1059
1060 if (count <= 0)
1061 return 0;
1062
1063#define LBUFSIZE 1200UL
1064 lbuf = kmalloc(LBUFSIZE, GFP_KERNEL);
1065 if (!lbuf)
1066 return 0;
1067
1068 local_count = min(LBUFSIZE - 1, count);
1069 if (copy_from_user(lbuf, buffer, local_count) != 0) {
1070 kfree(lbuf);
1071 return -EFAULT;
1072 }
1073 lbuf[local_count] = '\0';
1074
1075 ptr = strstr(lbuf, "Online devices");
1076 if (!ptr)
1077 goto out;
1078 ptr = strstr(ptr, "\n");
1079 if (!ptr)
1080 goto out;
1081 ptr++;
1082
1083 if (strstr(ptr, "Waiting work element counts") == NULL)
1084 goto out;
1085
1086 for (j = 0; j < 64 && *ptr; ptr++) {
1087 /*
1088 * '0' for no device, '1' for PCICA, '2' for PCICC,
1089 * '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3,
1090 * '5' for CEX2C and '6' for CEX2A'
1091 * '7' for CEX3C and '8' for CEX3A
1092 */
1093 if (*ptr >= '0' && *ptr <= '8')
1094 j++;
1095 else if (*ptr == 'd' || *ptr == 'D')
1096 zcrypt_disable_card(j++);
1097 else if (*ptr == 'e' || *ptr == 'E')
1098 zcrypt_enable_card(j++);
1099 else if (*ptr != ' ' && *ptr != '\t')
1100 break;
1101 }
1102out:
1103 kfree(lbuf);
1104 return count;
1105}
1106
1107static const struct file_operations zcrypt_proc_fops = {
1108 .owner = THIS_MODULE,
1109 .open = zcrypt_proc_open,
1110 .read = seq_read,
1111 .llseek = seq_lseek,
1112 .release = single_release,
1113 .write = zcrypt_proc_write,
1114};
1115
1116static int zcrypt_rng_device_count;
1117static u32 *zcrypt_rng_buffer;
1118static int zcrypt_rng_buffer_index;
1119static DEFINE_MUTEX(zcrypt_rng_mutex);
1120
1121static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1122{
1123 int rc;
1124
1125 /*
1126 * We don't need locking here because the RNG API guarantees serialized
1127 * read method calls.
1128 */
1129 if (zcrypt_rng_buffer_index == 0) {
1130 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1131 if (rc < 0)
1132 return -EIO;
1133 zcrypt_rng_buffer_index = rc / sizeof *data;
1134 }
1135 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1136 return sizeof *data;
1137}
1138
1139static struct hwrng zcrypt_rng_dev = {
1140 .name = "zcrypt",
1141 .data_read = zcrypt_rng_data_read,
1142};
1143
1144static int zcrypt_rng_device_add(void)
1145{
1146 int rc = 0;
1147
1148 mutex_lock(&zcrypt_rng_mutex);
1149 if (zcrypt_rng_device_count == 0) {
1150 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1151 if (!zcrypt_rng_buffer) {
1152 rc = -ENOMEM;
1153 goto out;
1154 }
1155 zcrypt_rng_buffer_index = 0;
1156 rc = hwrng_register(&zcrypt_rng_dev);
1157 if (rc)
1158 goto out_free;
1159 zcrypt_rng_device_count = 1;
1160 } else
1161 zcrypt_rng_device_count++;
1162 mutex_unlock(&zcrypt_rng_mutex);
1163 return 0;
1164
1165out_free:
1166 free_page((unsigned long) zcrypt_rng_buffer);
1167out:
1168 mutex_unlock(&zcrypt_rng_mutex);
1169 return rc;
1170}
1171
1172static void zcrypt_rng_device_remove(void)
1173{
1174 mutex_lock(&zcrypt_rng_mutex);
1175 zcrypt_rng_device_count--;
1176 if (zcrypt_rng_device_count == 0) {
1177 hwrng_unregister(&zcrypt_rng_dev);
1178 free_page((unsigned long) zcrypt_rng_buffer);
1179 }
1180 mutex_unlock(&zcrypt_rng_mutex);
1181}
1182
1183/**
1184 * zcrypt_api_init(): Module initialization.
1185 *
1186 * The module initialization code.
1187 */
1188int __init zcrypt_api_init(void)
1189{
1190 int rc;
1191
1192 /* Register the request sprayer. */
1193 rc = misc_register(&zcrypt_misc_device);
1194 if (rc < 0)
1195 goto out;
1196
1197 /* Set up the proc file system */
1198 zcrypt_entry = proc_create("driver/z90crypt", 0644, NULL, &zcrypt_proc_fops);
1199 if (!zcrypt_entry) {
1200 rc = -ENOMEM;
1201 goto out_misc;
1202 }
1203
1204 return 0;
1205
1206out_misc:
1207 misc_deregister(&zcrypt_misc_device);
1208out:
1209 return rc;
1210}
1211
1212/**
1213 * zcrypt_api_exit(): Module termination.
1214 *
1215 * The module termination code.
1216 */
1217void zcrypt_api_exit(void)
1218{
1219 remove_proc_entry("driver/z90crypt", NULL);
1220 misc_deregister(&zcrypt_misc_device);
1221}
1222
1223#ifndef CONFIG_ZCRYPT_MONOLITHIC
1224module_init(zcrypt_api_init);
1225module_exit(zcrypt_api_exit);
1226#endif
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 <asm/debug.h>
29
30#define CREATE_TRACE_POINTS
31#include <asm/trace/zcrypt.h>
32
33#include "zcrypt_api.h"
34#include "zcrypt_debug.h"
35
36#include "zcrypt_msgtype6.h"
37#include "zcrypt_msgtype50.h"
38#include "zcrypt_ccamisc.h"
39#include "zcrypt_ep11misc.h"
40
41/*
42 * Module description.
43 */
44MODULE_AUTHOR("IBM Corporation");
45MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
46 "Copyright IBM Corp. 2001, 2012");
47MODULE_LICENSE("GPL");
48
49/*
50 * zcrypt tracepoint functions
51 */
52EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
53EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
54
55static int zcrypt_hwrng_seed = 1;
56module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
57MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
58
59DEFINE_SPINLOCK(zcrypt_list_lock);
60LIST_HEAD(zcrypt_card_list);
61int zcrypt_device_count;
62
63static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
64static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
65
66atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
67EXPORT_SYMBOL(zcrypt_rescan_req);
68
69static LIST_HEAD(zcrypt_ops_list);
70
71/* Zcrypt related debug feature stuff. */
72debug_info_t *zcrypt_dbf_info;
73
74/**
75 * Process a rescan of the transport layer.
76 *
77 * Returns 1, if the rescan has been processed, otherwise 0.
78 */
79static inline int zcrypt_process_rescan(void)
80{
81 if (atomic_read(&zcrypt_rescan_req)) {
82 atomic_set(&zcrypt_rescan_req, 0);
83 atomic_inc(&zcrypt_rescan_count);
84 ap_bus_force_rescan();
85 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
86 atomic_inc_return(&zcrypt_rescan_count));
87 return 1;
88 }
89 return 0;
90}
91
92void zcrypt_msgtype_register(struct zcrypt_ops *zops)
93{
94 list_add_tail(&zops->list, &zcrypt_ops_list);
95}
96
97void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
98{
99 list_del_init(&zops->list);
100}
101
102struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
103{
104 struct zcrypt_ops *zops;
105
106 list_for_each_entry(zops, &zcrypt_ops_list, list)
107 if ((zops->variant == variant) &&
108 (!strncmp(zops->name, name, sizeof(zops->name))))
109 return zops;
110 return NULL;
111}
112EXPORT_SYMBOL(zcrypt_msgtype);
113
114/*
115 * Multi device nodes extension functions.
116 */
117
118#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
119
120struct zcdn_device;
121
122static struct class *zcrypt_class;
123static dev_t zcrypt_devt;
124static struct cdev zcrypt_cdev;
125
126struct zcdn_device {
127 struct device device;
128 struct ap_perms perms;
129};
130
131#define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
132
133#define ZCDN_MAX_NAME 32
134
135static int zcdn_create(const char *name);
136static int zcdn_destroy(const char *name);
137
138/*
139 * Find zcdn device by name.
140 * Returns reference to the zcdn device which needs to be released
141 * with put_device() after use.
142 */
143static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
144{
145 struct device *dev = class_find_device_by_name(zcrypt_class, name);
146
147 return dev ? to_zcdn_dev(dev) : NULL;
148}
149
150/*
151 * Find zcdn device by devt value.
152 * Returns reference to the zcdn device which needs to be released
153 * with put_device() after use.
154 */
155static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
156{
157 struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
158
159 return dev ? to_zcdn_dev(dev) : NULL;
160}
161
162static ssize_t ioctlmask_show(struct device *dev,
163 struct device_attribute *attr,
164 char *buf)
165{
166 int i, rc;
167 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
168
169 if (mutex_lock_interruptible(&ap_perms_mutex))
170 return -ERESTARTSYS;
171
172 buf[0] = '0';
173 buf[1] = 'x';
174 for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
175 snprintf(buf + 2 + 2 * i * sizeof(long),
176 PAGE_SIZE - 2 - 2 * i * sizeof(long),
177 "%016lx", zcdndev->perms.ioctlm[i]);
178 buf[2 + 2 * i * sizeof(long)] = '\n';
179 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
180 rc = 2 + 2 * i * sizeof(long) + 1;
181
182 mutex_unlock(&ap_perms_mutex);
183
184 return rc;
185}
186
187static ssize_t ioctlmask_store(struct device *dev,
188 struct device_attribute *attr,
189 const char *buf, size_t count)
190{
191 int rc;
192 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
193
194 rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
195 AP_IOCTLS, &ap_perms_mutex);
196 if (rc)
197 return rc;
198
199 return count;
200}
201
202static DEVICE_ATTR_RW(ioctlmask);
203
204static ssize_t apmask_show(struct device *dev,
205 struct device_attribute *attr,
206 char *buf)
207{
208 int i, rc;
209 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
210
211 if (mutex_lock_interruptible(&ap_perms_mutex))
212 return -ERESTARTSYS;
213
214 buf[0] = '0';
215 buf[1] = 'x';
216 for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
217 snprintf(buf + 2 + 2 * i * sizeof(long),
218 PAGE_SIZE - 2 - 2 * i * sizeof(long),
219 "%016lx", zcdndev->perms.apm[i]);
220 buf[2 + 2 * i * sizeof(long)] = '\n';
221 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
222 rc = 2 + 2 * i * sizeof(long) + 1;
223
224 mutex_unlock(&ap_perms_mutex);
225
226 return rc;
227}
228
229static ssize_t apmask_store(struct device *dev,
230 struct device_attribute *attr,
231 const char *buf, size_t count)
232{
233 int rc;
234 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
235
236 rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
237 AP_DEVICES, &ap_perms_mutex);
238 if (rc)
239 return rc;
240
241 return count;
242}
243
244static DEVICE_ATTR_RW(apmask);
245
246static ssize_t aqmask_show(struct device *dev,
247 struct device_attribute *attr,
248 char *buf)
249{
250 int i, rc;
251 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
252
253 if (mutex_lock_interruptible(&ap_perms_mutex))
254 return -ERESTARTSYS;
255
256 buf[0] = '0';
257 buf[1] = 'x';
258 for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
259 snprintf(buf + 2 + 2 * i * sizeof(long),
260 PAGE_SIZE - 2 - 2 * i * sizeof(long),
261 "%016lx", zcdndev->perms.aqm[i]);
262 buf[2 + 2 * i * sizeof(long)] = '\n';
263 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
264 rc = 2 + 2 * i * sizeof(long) + 1;
265
266 mutex_unlock(&ap_perms_mutex);
267
268 return rc;
269}
270
271static ssize_t aqmask_store(struct device *dev,
272 struct device_attribute *attr,
273 const char *buf, size_t count)
274{
275 int rc;
276 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
277
278 rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
279 AP_DOMAINS, &ap_perms_mutex);
280 if (rc)
281 return rc;
282
283 return count;
284}
285
286static DEVICE_ATTR_RW(aqmask);
287
288static struct attribute *zcdn_dev_attrs[] = {
289 &dev_attr_ioctlmask.attr,
290 &dev_attr_apmask.attr,
291 &dev_attr_aqmask.attr,
292 NULL
293};
294
295static struct attribute_group zcdn_dev_attr_group = {
296 .attrs = zcdn_dev_attrs
297};
298
299static const struct attribute_group *zcdn_dev_attr_groups[] = {
300 &zcdn_dev_attr_group,
301 NULL
302};
303
304static ssize_t zcdn_create_store(struct class *class,
305 struct class_attribute *attr,
306 const char *buf, size_t count)
307{
308 int rc;
309 char name[ZCDN_MAX_NAME];
310
311 strncpy(name, skip_spaces(buf), sizeof(name));
312 name[sizeof(name) - 1] = '\0';
313
314 rc = zcdn_create(strim(name));
315
316 return rc ? rc : count;
317}
318
319static const struct class_attribute class_attr_zcdn_create =
320 __ATTR(create, 0600, NULL, zcdn_create_store);
321
322static ssize_t zcdn_destroy_store(struct class *class,
323 struct class_attribute *attr,
324 const char *buf, size_t count)
325{
326 int rc;
327 char name[ZCDN_MAX_NAME];
328
329 strncpy(name, skip_spaces(buf), sizeof(name));
330 name[sizeof(name) - 1] = '\0';
331
332 rc = zcdn_destroy(strim(name));
333
334 return rc ? rc : count;
335}
336
337static const struct class_attribute class_attr_zcdn_destroy =
338 __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
339
340static void zcdn_device_release(struct device *dev)
341{
342 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
343
344 ZCRYPT_DBF(DBF_INFO, "releasing zcdn device %d:%d\n",
345 MAJOR(dev->devt), MINOR(dev->devt));
346
347 kfree(zcdndev);
348}
349
350static int zcdn_create(const char *name)
351{
352 dev_t devt;
353 int i, rc = 0;
354 char nodename[ZCDN_MAX_NAME];
355 struct zcdn_device *zcdndev;
356
357 if (mutex_lock_interruptible(&ap_perms_mutex))
358 return -ERESTARTSYS;
359
360 /* check if device node with this name already exists */
361 if (name[0]) {
362 zcdndev = find_zcdndev_by_name(name);
363 if (zcdndev) {
364 put_device(&zcdndev->device);
365 rc = -EEXIST;
366 goto unlockout;
367 }
368 }
369
370 /* find an unused minor number */
371 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
372 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
373 zcdndev = find_zcdndev_by_devt(devt);
374 if (zcdndev)
375 put_device(&zcdndev->device);
376 else
377 break;
378 }
379 if (i == ZCRYPT_MAX_MINOR_NODES) {
380 rc = -ENOSPC;
381 goto unlockout;
382 }
383
384 /* alloc and prepare a new zcdn device */
385 zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
386 if (!zcdndev) {
387 rc = -ENOMEM;
388 goto unlockout;
389 }
390 zcdndev->device.release = zcdn_device_release;
391 zcdndev->device.class = zcrypt_class;
392 zcdndev->device.devt = devt;
393 zcdndev->device.groups = zcdn_dev_attr_groups;
394 if (name[0])
395 strncpy(nodename, name, sizeof(nodename));
396 else
397 snprintf(nodename, sizeof(nodename),
398 ZCRYPT_NAME "_%d", (int) MINOR(devt));
399 nodename[sizeof(nodename)-1] = '\0';
400 if (dev_set_name(&zcdndev->device, nodename)) {
401 rc = -EINVAL;
402 goto unlockout;
403 }
404 rc = device_register(&zcdndev->device);
405 if (rc) {
406 put_device(&zcdndev->device);
407 goto unlockout;
408 }
409
410 ZCRYPT_DBF(DBF_INFO, "created zcdn device %d:%d\n",
411 MAJOR(devt), MINOR(devt));
412
413unlockout:
414 mutex_unlock(&ap_perms_mutex);
415 return rc;
416}
417
418static int zcdn_destroy(const char *name)
419{
420 int rc = 0;
421 struct zcdn_device *zcdndev;
422
423 if (mutex_lock_interruptible(&ap_perms_mutex))
424 return -ERESTARTSYS;
425
426 /* try to find this zcdn device */
427 zcdndev = find_zcdndev_by_name(name);
428 if (!zcdndev) {
429 rc = -ENOENT;
430 goto unlockout;
431 }
432
433 /*
434 * The zcdn device is not hard destroyed. It is subject to
435 * reference counting and thus just needs to be unregistered.
436 */
437 put_device(&zcdndev->device);
438 device_unregister(&zcdndev->device);
439
440unlockout:
441 mutex_unlock(&ap_perms_mutex);
442 return rc;
443}
444
445static void zcdn_destroy_all(void)
446{
447 int i;
448 dev_t devt;
449 struct zcdn_device *zcdndev;
450
451 mutex_lock(&ap_perms_mutex);
452 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
453 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
454 zcdndev = find_zcdndev_by_devt(devt);
455 if (zcdndev) {
456 put_device(&zcdndev->device);
457 device_unregister(&zcdndev->device);
458 }
459 }
460 mutex_unlock(&ap_perms_mutex);
461}
462
463#endif
464
465/**
466 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
467 *
468 * This function is not supported beyond zcrypt 1.3.1.
469 */
470static ssize_t zcrypt_read(struct file *filp, char __user *buf,
471 size_t count, loff_t *f_pos)
472{
473 return -EPERM;
474}
475
476/**
477 * zcrypt_write(): Not allowed.
478 *
479 * Write is is not allowed
480 */
481static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
482 size_t count, loff_t *f_pos)
483{
484 return -EPERM;
485}
486
487/**
488 * zcrypt_open(): Count number of users.
489 *
490 * Device open function to count number of users.
491 */
492static int zcrypt_open(struct inode *inode, struct file *filp)
493{
494 struct ap_perms *perms = &ap_perms;
495
496#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
497 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
498 struct zcdn_device *zcdndev;
499
500 if (mutex_lock_interruptible(&ap_perms_mutex))
501 return -ERESTARTSYS;
502 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
503 /* find returns a reference, no get_device() needed */
504 mutex_unlock(&ap_perms_mutex);
505 if (zcdndev)
506 perms = &zcdndev->perms;
507 }
508#endif
509 filp->private_data = (void *) perms;
510
511 atomic_inc(&zcrypt_open_count);
512 return stream_open(inode, filp);
513}
514
515/**
516 * zcrypt_release(): Count number of users.
517 *
518 * Device close function to count number of users.
519 */
520static int zcrypt_release(struct inode *inode, struct file *filp)
521{
522#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
523 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
524 struct zcdn_device *zcdndev;
525
526 mutex_lock(&ap_perms_mutex);
527 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
528 mutex_unlock(&ap_perms_mutex);
529 if (zcdndev) {
530 /* 2 puts here: one for find, one for open */
531 put_device(&zcdndev->device);
532 put_device(&zcdndev->device);
533 }
534 }
535#endif
536
537 atomic_dec(&zcrypt_open_count);
538 return 0;
539}
540
541static inline int zcrypt_check_ioctl(struct ap_perms *perms,
542 unsigned int cmd)
543{
544 int rc = -EPERM;
545 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
546
547 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
548 if (test_bit_inv(ioctlnr, perms->ioctlm))
549 rc = 0;
550 }
551
552 if (rc)
553 ZCRYPT_DBF(DBF_WARN,
554 "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
555 ioctlnr, rc);
556
557 return rc;
558}
559
560static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
561{
562 return test_bit_inv(card, perms->apm) ? true : false;
563}
564
565static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
566{
567 return test_bit_inv(queue, perms->aqm) ? true : false;
568}
569
570static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
571 struct zcrypt_queue *zq,
572 struct module **pmod,
573 unsigned int weight)
574{
575 if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
576 return NULL;
577 zcrypt_queue_get(zq);
578 get_device(&zq->queue->ap_dev.device);
579 atomic_add(weight, &zc->load);
580 atomic_add(weight, &zq->load);
581 zq->request_count++;
582 *pmod = zq->queue->ap_dev.drv->driver.owner;
583 return zq;
584}
585
586static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
587 struct zcrypt_queue *zq,
588 struct module *mod,
589 unsigned int weight)
590{
591 zq->request_count--;
592 atomic_sub(weight, &zc->load);
593 atomic_sub(weight, &zq->load);
594 put_device(&zq->queue->ap_dev.device);
595 zcrypt_queue_put(zq);
596 module_put(mod);
597}
598
599static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
600 struct zcrypt_card *pref_zc,
601 unsigned int weight,
602 unsigned int pref_weight)
603{
604 if (!pref_zc)
605 return false;
606 weight += atomic_read(&zc->load);
607 pref_weight += atomic_read(&pref_zc->load);
608 if (weight == pref_weight)
609 return atomic64_read(&zc->card->total_request_count) >
610 atomic64_read(&pref_zc->card->total_request_count);
611 return weight > pref_weight;
612}
613
614static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
615 struct zcrypt_queue *pref_zq,
616 unsigned int weight,
617 unsigned int pref_weight)
618{
619 if (!pref_zq)
620 return false;
621 weight += atomic_read(&zq->load);
622 pref_weight += atomic_read(&pref_zq->load);
623 if (weight == pref_weight)
624 return zq->queue->total_request_count >
625 pref_zq->queue->total_request_count;
626 return weight > pref_weight;
627}
628
629/*
630 * zcrypt ioctls.
631 */
632static long zcrypt_rsa_modexpo(struct ap_perms *perms,
633 struct ica_rsa_modexpo *mex)
634{
635 struct zcrypt_card *zc, *pref_zc;
636 struct zcrypt_queue *zq, *pref_zq;
637 unsigned int weight = 0, pref_weight = 0;
638 unsigned int func_code;
639 int qid = 0, rc = -ENODEV;
640 struct module *mod;
641
642 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
643
644 if (mex->outputdatalength < mex->inputdatalength) {
645 func_code = 0;
646 rc = -EINVAL;
647 goto out;
648 }
649
650 /*
651 * As long as outputdatalength is big enough, we can set the
652 * outputdatalength equal to the inputdatalength, since that is the
653 * number of bytes we will copy in any case
654 */
655 mex->outputdatalength = mex->inputdatalength;
656
657 rc = get_rsa_modex_fc(mex, &func_code);
658 if (rc)
659 goto out;
660
661 pref_zc = NULL;
662 pref_zq = NULL;
663 spin_lock(&zcrypt_list_lock);
664 for_each_zcrypt_card(zc) {
665 /* Check for online accelarator and CCA cards */
666 if (!zc->online || !(zc->card->functions & 0x18000000))
667 continue;
668 /* Check for size limits */
669 if (zc->min_mod_size > mex->inputdatalength ||
670 zc->max_mod_size < mex->inputdatalength)
671 continue;
672 /* check if device node has admission for this card */
673 if (!zcrypt_check_card(perms, zc->card->id))
674 continue;
675 /* get weight index of the card device */
676 weight = zc->speed_rating[func_code];
677 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
678 continue;
679 for_each_zcrypt_queue(zq, zc) {
680 /* check if device is online and eligible */
681 if (!zq->online || !zq->ops->rsa_modexpo)
682 continue;
683 /* check if device node has admission for this queue */
684 if (!zcrypt_check_queue(perms,
685 AP_QID_QUEUE(zq->queue->qid)))
686 continue;
687 if (zcrypt_queue_compare(zq, pref_zq,
688 weight, pref_weight))
689 continue;
690 pref_zc = zc;
691 pref_zq = zq;
692 pref_weight = weight;
693 }
694 }
695 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
696 spin_unlock(&zcrypt_list_lock);
697
698 if (!pref_zq) {
699 rc = -ENODEV;
700 goto out;
701 }
702
703 qid = pref_zq->queue->qid;
704 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
705
706 spin_lock(&zcrypt_list_lock);
707 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
708 spin_unlock(&zcrypt_list_lock);
709
710out:
711 trace_s390_zcrypt_rep(mex, func_code, rc,
712 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
713 return rc;
714}
715
716static long zcrypt_rsa_crt(struct ap_perms *perms,
717 struct ica_rsa_modexpo_crt *crt)
718{
719 struct zcrypt_card *zc, *pref_zc;
720 struct zcrypt_queue *zq, *pref_zq;
721 unsigned int weight = 0, pref_weight = 0;
722 unsigned int func_code;
723 int qid = 0, rc = -ENODEV;
724 struct module *mod;
725
726 trace_s390_zcrypt_req(crt, TP_ICARSACRT);
727
728 if (crt->outputdatalength < crt->inputdatalength) {
729 func_code = 0;
730 rc = -EINVAL;
731 goto out;
732 }
733
734 /*
735 * As long as outputdatalength is big enough, we can set the
736 * outputdatalength equal to the inputdatalength, since that is the
737 * number of bytes we will copy in any case
738 */
739 crt->outputdatalength = crt->inputdatalength;
740
741 rc = get_rsa_crt_fc(crt, &func_code);
742 if (rc)
743 goto out;
744
745 pref_zc = NULL;
746 pref_zq = NULL;
747 spin_lock(&zcrypt_list_lock);
748 for_each_zcrypt_card(zc) {
749 /* Check for online accelarator and CCA cards */
750 if (!zc->online || !(zc->card->functions & 0x18000000))
751 continue;
752 /* Check for size limits */
753 if (zc->min_mod_size > crt->inputdatalength ||
754 zc->max_mod_size < crt->inputdatalength)
755 continue;
756 /* check if device node has admission for this card */
757 if (!zcrypt_check_card(perms, zc->card->id))
758 continue;
759 /* get weight index of the card device */
760 weight = zc->speed_rating[func_code];
761 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
762 continue;
763 for_each_zcrypt_queue(zq, zc) {
764 /* check if device is online and eligible */
765 if (!zq->online || !zq->ops->rsa_modexpo_crt)
766 continue;
767 /* check if device node has admission for this queue */
768 if (!zcrypt_check_queue(perms,
769 AP_QID_QUEUE(zq->queue->qid)))
770 continue;
771 if (zcrypt_queue_compare(zq, pref_zq,
772 weight, pref_weight))
773 continue;
774 pref_zc = zc;
775 pref_zq = zq;
776 pref_weight = weight;
777 }
778 }
779 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
780 spin_unlock(&zcrypt_list_lock);
781
782 if (!pref_zq) {
783 rc = -ENODEV;
784 goto out;
785 }
786
787 qid = pref_zq->queue->qid;
788 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
789
790 spin_lock(&zcrypt_list_lock);
791 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
792 spin_unlock(&zcrypt_list_lock);
793
794out:
795 trace_s390_zcrypt_rep(crt, func_code, rc,
796 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
797 return rc;
798}
799
800static long _zcrypt_send_cprb(struct ap_perms *perms,
801 struct ica_xcRB *xcRB)
802{
803 struct zcrypt_card *zc, *pref_zc;
804 struct zcrypt_queue *zq, *pref_zq;
805 struct ap_message ap_msg;
806 unsigned int weight = 0, pref_weight = 0;
807 unsigned int func_code;
808 unsigned short *domain, tdom;
809 int qid = 0, rc = -ENODEV;
810 struct module *mod;
811
812 trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
813
814 xcRB->status = 0;
815 ap_init_message(&ap_msg);
816 rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
817 if (rc)
818 goto out;
819
820 /*
821 * If a valid target domain is set and this domain is NOT a usage
822 * domain but a control only domain, use the default domain as target.
823 */
824 tdom = *domain;
825 if (tdom < AP_DOMAINS &&
826 !ap_test_config_usage_domain(tdom) &&
827 ap_test_config_ctrl_domain(tdom) &&
828 ap_domain_index >= 0)
829 tdom = ap_domain_index;
830
831 pref_zc = NULL;
832 pref_zq = NULL;
833 spin_lock(&zcrypt_list_lock);
834 for_each_zcrypt_card(zc) {
835 /* Check for online CCA cards */
836 if (!zc->online || !(zc->card->functions & 0x10000000))
837 continue;
838 /* Check for user selected CCA card */
839 if (xcRB->user_defined != AUTOSELECT &&
840 xcRB->user_defined != zc->card->id)
841 continue;
842 /* check if device node has admission for this card */
843 if (!zcrypt_check_card(perms, zc->card->id))
844 continue;
845 /* get weight index of the card device */
846 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
847 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
848 continue;
849 for_each_zcrypt_queue(zq, zc) {
850 /* check if device is online and eligible */
851 if (!zq->online ||
852 !zq->ops->send_cprb ||
853 (tdom != AUTOSEL_DOM &&
854 tdom != AP_QID_QUEUE(zq->queue->qid)))
855 continue;
856 /* check if device node has admission for this queue */
857 if (!zcrypt_check_queue(perms,
858 AP_QID_QUEUE(zq->queue->qid)))
859 continue;
860 if (zcrypt_queue_compare(zq, pref_zq,
861 weight, pref_weight))
862 continue;
863 pref_zc = zc;
864 pref_zq = zq;
865 pref_weight = weight;
866 }
867 }
868 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
869 spin_unlock(&zcrypt_list_lock);
870
871 if (!pref_zq) {
872 rc = -ENODEV;
873 goto out;
874 }
875
876 /* in case of auto select, provide the correct domain */
877 qid = pref_zq->queue->qid;
878 if (*domain == AUTOSEL_DOM)
879 *domain = AP_QID_QUEUE(qid);
880
881 rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
882
883 spin_lock(&zcrypt_list_lock);
884 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
885 spin_unlock(&zcrypt_list_lock);
886
887out:
888 ap_release_message(&ap_msg);
889 trace_s390_zcrypt_rep(xcRB, func_code, rc,
890 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
891 return rc;
892}
893
894long zcrypt_send_cprb(struct ica_xcRB *xcRB)
895{
896 return _zcrypt_send_cprb(&ap_perms, xcRB);
897}
898EXPORT_SYMBOL(zcrypt_send_cprb);
899
900static bool is_desired_ep11_card(unsigned int dev_id,
901 unsigned short target_num,
902 struct ep11_target_dev *targets)
903{
904 while (target_num-- > 0) {
905 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
906 return true;
907 targets++;
908 }
909 return false;
910}
911
912static bool is_desired_ep11_queue(unsigned int dev_qid,
913 unsigned short target_num,
914 struct ep11_target_dev *targets)
915{
916 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
917
918 while (target_num-- > 0) {
919 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
920 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
921 return true;
922 targets++;
923 }
924 return false;
925}
926
927static long _zcrypt_send_ep11_cprb(struct ap_perms *perms,
928 struct ep11_urb *xcrb)
929{
930 struct zcrypt_card *zc, *pref_zc;
931 struct zcrypt_queue *zq, *pref_zq;
932 struct ep11_target_dev *targets;
933 unsigned short target_num;
934 unsigned int weight = 0, pref_weight = 0;
935 unsigned int func_code;
936 struct ap_message ap_msg;
937 int qid = 0, rc = -ENODEV;
938 struct module *mod;
939
940 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
941
942 ap_init_message(&ap_msg);
943
944 target_num = (unsigned short) xcrb->targets_num;
945
946 /* empty list indicates autoselect (all available targets) */
947 targets = NULL;
948 if (target_num != 0) {
949 struct ep11_target_dev __user *uptr;
950
951 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
952 if (!targets) {
953 func_code = 0;
954 rc = -ENOMEM;
955 goto out;
956 }
957
958 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
959 if (copy_from_user(targets, uptr,
960 target_num * sizeof(*targets))) {
961 func_code = 0;
962 rc = -EFAULT;
963 goto out_free;
964 }
965 }
966
967 rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
968 if (rc)
969 goto out_free;
970
971 pref_zc = NULL;
972 pref_zq = NULL;
973 spin_lock(&zcrypt_list_lock);
974 for_each_zcrypt_card(zc) {
975 /* Check for online EP11 cards */
976 if (!zc->online || !(zc->card->functions & 0x04000000))
977 continue;
978 /* Check for user selected EP11 card */
979 if (targets &&
980 !is_desired_ep11_card(zc->card->id, target_num, targets))
981 continue;
982 /* check if device node has admission for this card */
983 if (!zcrypt_check_card(perms, zc->card->id))
984 continue;
985 /* get weight index of the card device */
986 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
987 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
988 continue;
989 for_each_zcrypt_queue(zq, zc) {
990 /* check if device is online and eligible */
991 if (!zq->online ||
992 !zq->ops->send_ep11_cprb ||
993 (targets &&
994 !is_desired_ep11_queue(zq->queue->qid,
995 target_num, targets)))
996 continue;
997 /* check if device node has admission for this queue */
998 if (!zcrypt_check_queue(perms,
999 AP_QID_QUEUE(zq->queue->qid)))
1000 continue;
1001 if (zcrypt_queue_compare(zq, pref_zq,
1002 weight, pref_weight))
1003 continue;
1004 pref_zc = zc;
1005 pref_zq = zq;
1006 pref_weight = weight;
1007 }
1008 }
1009 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1010 spin_unlock(&zcrypt_list_lock);
1011
1012 if (!pref_zq) {
1013 rc = -ENODEV;
1014 goto out_free;
1015 }
1016
1017 qid = pref_zq->queue->qid;
1018 rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
1019
1020 spin_lock(&zcrypt_list_lock);
1021 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1022 spin_unlock(&zcrypt_list_lock);
1023
1024out_free:
1025 kfree(targets);
1026out:
1027 ap_release_message(&ap_msg);
1028 trace_s390_zcrypt_rep(xcrb, func_code, rc,
1029 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1030 return rc;
1031}
1032
1033long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1034{
1035 return _zcrypt_send_ep11_cprb(&ap_perms, xcrb);
1036}
1037EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1038
1039static long zcrypt_rng(char *buffer)
1040{
1041 struct zcrypt_card *zc, *pref_zc;
1042 struct zcrypt_queue *zq, *pref_zq;
1043 unsigned int weight = 0, pref_weight = 0;
1044 unsigned int func_code;
1045 struct ap_message ap_msg;
1046 unsigned int domain;
1047 int qid = 0, rc = -ENODEV;
1048 struct module *mod;
1049
1050 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1051
1052 ap_init_message(&ap_msg);
1053 rc = get_rng_fc(&ap_msg, &func_code, &domain);
1054 if (rc)
1055 goto out;
1056
1057 pref_zc = NULL;
1058 pref_zq = NULL;
1059 spin_lock(&zcrypt_list_lock);
1060 for_each_zcrypt_card(zc) {
1061 /* Check for online CCA cards */
1062 if (!zc->online || !(zc->card->functions & 0x10000000))
1063 continue;
1064 /* get weight index of the card device */
1065 weight = zc->speed_rating[func_code];
1066 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1067 continue;
1068 for_each_zcrypt_queue(zq, zc) {
1069 /* check if device is online and eligible */
1070 if (!zq->online || !zq->ops->rng)
1071 continue;
1072 if (zcrypt_queue_compare(zq, pref_zq,
1073 weight, pref_weight))
1074 continue;
1075 pref_zc = zc;
1076 pref_zq = zq;
1077 pref_weight = weight;
1078 }
1079 }
1080 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1081 spin_unlock(&zcrypt_list_lock);
1082
1083 if (!pref_zq) {
1084 rc = -ENODEV;
1085 goto out;
1086 }
1087
1088 qid = pref_zq->queue->qid;
1089 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1090
1091 spin_lock(&zcrypt_list_lock);
1092 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1093 spin_unlock(&zcrypt_list_lock);
1094
1095out:
1096 ap_release_message(&ap_msg);
1097 trace_s390_zcrypt_rep(buffer, func_code, rc,
1098 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1099 return rc;
1100}
1101
1102static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1103{
1104 struct zcrypt_card *zc;
1105 struct zcrypt_queue *zq;
1106 struct zcrypt_device_status *stat;
1107 int card, queue;
1108
1109 memset(devstatus, 0, MAX_ZDEV_ENTRIES
1110 * sizeof(struct zcrypt_device_status));
1111
1112 spin_lock(&zcrypt_list_lock);
1113 for_each_zcrypt_card(zc) {
1114 for_each_zcrypt_queue(zq, zc) {
1115 card = AP_QID_CARD(zq->queue->qid);
1116 if (card >= MAX_ZDEV_CARDIDS)
1117 continue;
1118 queue = AP_QID_QUEUE(zq->queue->qid);
1119 stat = &devstatus[card * AP_DOMAINS + queue];
1120 stat->hwtype = zc->card->ap_dev.device_type;
1121 stat->functions = zc->card->functions >> 26;
1122 stat->qid = zq->queue->qid;
1123 stat->online = zq->online ? 0x01 : 0x00;
1124 }
1125 }
1126 spin_unlock(&zcrypt_list_lock);
1127}
1128
1129void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1130{
1131 struct zcrypt_card *zc;
1132 struct zcrypt_queue *zq;
1133 struct zcrypt_device_status_ext *stat;
1134 int card, queue;
1135
1136 memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1137 * sizeof(struct zcrypt_device_status_ext));
1138
1139 spin_lock(&zcrypt_list_lock);
1140 for_each_zcrypt_card(zc) {
1141 for_each_zcrypt_queue(zq, zc) {
1142 card = AP_QID_CARD(zq->queue->qid);
1143 queue = AP_QID_QUEUE(zq->queue->qid);
1144 stat = &devstatus[card * AP_DOMAINS + queue];
1145 stat->hwtype = zc->card->ap_dev.device_type;
1146 stat->functions = zc->card->functions >> 26;
1147 stat->qid = zq->queue->qid;
1148 stat->online = zq->online ? 0x01 : 0x00;
1149 }
1150 }
1151 spin_unlock(&zcrypt_list_lock);
1152}
1153EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1154
1155int zcrypt_device_status_ext(int card, int queue,
1156 struct zcrypt_device_status_ext *devstat)
1157{
1158 struct zcrypt_card *zc;
1159 struct zcrypt_queue *zq;
1160
1161 memset(devstat, 0, sizeof(*devstat));
1162
1163 spin_lock(&zcrypt_list_lock);
1164 for_each_zcrypt_card(zc) {
1165 for_each_zcrypt_queue(zq, zc) {
1166 if (card == AP_QID_CARD(zq->queue->qid) &&
1167 queue == AP_QID_QUEUE(zq->queue->qid)) {
1168 devstat->hwtype = zc->card->ap_dev.device_type;
1169 devstat->functions = zc->card->functions >> 26;
1170 devstat->qid = zq->queue->qid;
1171 devstat->online = zq->online ? 0x01 : 0x00;
1172 spin_unlock(&zcrypt_list_lock);
1173 return 0;
1174 }
1175 }
1176 }
1177 spin_unlock(&zcrypt_list_lock);
1178
1179 return -ENODEV;
1180}
1181EXPORT_SYMBOL(zcrypt_device_status_ext);
1182
1183static void zcrypt_status_mask(char status[], size_t max_adapters)
1184{
1185 struct zcrypt_card *zc;
1186 struct zcrypt_queue *zq;
1187 int card;
1188
1189 memset(status, 0, max_adapters);
1190 spin_lock(&zcrypt_list_lock);
1191 for_each_zcrypt_card(zc) {
1192 for_each_zcrypt_queue(zq, zc) {
1193 card = AP_QID_CARD(zq->queue->qid);
1194 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1195 || card >= max_adapters)
1196 continue;
1197 status[card] = zc->online ? zc->user_space_type : 0x0d;
1198 }
1199 }
1200 spin_unlock(&zcrypt_list_lock);
1201}
1202
1203static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1204{
1205 struct zcrypt_card *zc;
1206 struct zcrypt_queue *zq;
1207 int card;
1208
1209 memset(qdepth, 0, max_adapters);
1210 spin_lock(&zcrypt_list_lock);
1211 local_bh_disable();
1212 for_each_zcrypt_card(zc) {
1213 for_each_zcrypt_queue(zq, zc) {
1214 card = AP_QID_CARD(zq->queue->qid);
1215 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1216 || card >= max_adapters)
1217 continue;
1218 spin_lock(&zq->queue->lock);
1219 qdepth[card] =
1220 zq->queue->pendingq_count +
1221 zq->queue->requestq_count;
1222 spin_unlock(&zq->queue->lock);
1223 }
1224 }
1225 local_bh_enable();
1226 spin_unlock(&zcrypt_list_lock);
1227}
1228
1229static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1230{
1231 struct zcrypt_card *zc;
1232 struct zcrypt_queue *zq;
1233 int card;
1234 u64 cnt;
1235
1236 memset(reqcnt, 0, sizeof(int) * max_adapters);
1237 spin_lock(&zcrypt_list_lock);
1238 local_bh_disable();
1239 for_each_zcrypt_card(zc) {
1240 for_each_zcrypt_queue(zq, zc) {
1241 card = AP_QID_CARD(zq->queue->qid);
1242 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1243 || card >= max_adapters)
1244 continue;
1245 spin_lock(&zq->queue->lock);
1246 cnt = zq->queue->total_request_count;
1247 spin_unlock(&zq->queue->lock);
1248 reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX;
1249 }
1250 }
1251 local_bh_enable();
1252 spin_unlock(&zcrypt_list_lock);
1253}
1254
1255static int zcrypt_pendingq_count(void)
1256{
1257 struct zcrypt_card *zc;
1258 struct zcrypt_queue *zq;
1259 int pendingq_count;
1260
1261 pendingq_count = 0;
1262 spin_lock(&zcrypt_list_lock);
1263 local_bh_disable();
1264 for_each_zcrypt_card(zc) {
1265 for_each_zcrypt_queue(zq, zc) {
1266 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1267 continue;
1268 spin_lock(&zq->queue->lock);
1269 pendingq_count += zq->queue->pendingq_count;
1270 spin_unlock(&zq->queue->lock);
1271 }
1272 }
1273 local_bh_enable();
1274 spin_unlock(&zcrypt_list_lock);
1275 return pendingq_count;
1276}
1277
1278static int zcrypt_requestq_count(void)
1279{
1280 struct zcrypt_card *zc;
1281 struct zcrypt_queue *zq;
1282 int requestq_count;
1283
1284 requestq_count = 0;
1285 spin_lock(&zcrypt_list_lock);
1286 local_bh_disable();
1287 for_each_zcrypt_card(zc) {
1288 for_each_zcrypt_queue(zq, zc) {
1289 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1290 continue;
1291 spin_lock(&zq->queue->lock);
1292 requestq_count += zq->queue->requestq_count;
1293 spin_unlock(&zq->queue->lock);
1294 }
1295 }
1296 local_bh_enable();
1297 spin_unlock(&zcrypt_list_lock);
1298 return requestq_count;
1299}
1300
1301static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1302{
1303 int rc;
1304 struct ica_rsa_modexpo mex;
1305 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1306
1307 if (copy_from_user(&mex, umex, sizeof(mex)))
1308 return -EFAULT;
1309 do {
1310 rc = zcrypt_rsa_modexpo(perms, &mex);
1311 } while (rc == -EAGAIN);
1312 /* on failure: retry once again after a requested rescan */
1313 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1314 do {
1315 rc = zcrypt_rsa_modexpo(perms, &mex);
1316 } while (rc == -EAGAIN);
1317 if (rc) {
1318 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1319 return rc;
1320 }
1321 return put_user(mex.outputdatalength, &umex->outputdatalength);
1322}
1323
1324static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1325{
1326 int rc;
1327 struct ica_rsa_modexpo_crt crt;
1328 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1329
1330 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1331 return -EFAULT;
1332 do {
1333 rc = zcrypt_rsa_crt(perms, &crt);
1334 } while (rc == -EAGAIN);
1335 /* on failure: retry once again after a requested rescan */
1336 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1337 do {
1338 rc = zcrypt_rsa_crt(perms, &crt);
1339 } while (rc == -EAGAIN);
1340 if (rc) {
1341 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1342 return rc;
1343 }
1344 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1345}
1346
1347static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1348{
1349 int rc;
1350 struct ica_xcRB xcRB;
1351 struct ica_xcRB __user *uxcRB = (void __user *) arg;
1352
1353 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1354 return -EFAULT;
1355 do {
1356 rc = _zcrypt_send_cprb(perms, &xcRB);
1357 } while (rc == -EAGAIN);
1358 /* on failure: retry once again after a requested rescan */
1359 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1360 do {
1361 rc = _zcrypt_send_cprb(perms, &xcRB);
1362 } while (rc == -EAGAIN);
1363 if (rc)
1364 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1365 rc, xcRB.status);
1366 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1367 return -EFAULT;
1368 return rc;
1369}
1370
1371static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1372{
1373 int rc;
1374 struct ep11_urb xcrb;
1375 struct ep11_urb __user *uxcrb = (void __user *)arg;
1376
1377 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1378 return -EFAULT;
1379 do {
1380 rc = _zcrypt_send_ep11_cprb(perms, &xcrb);
1381 } while (rc == -EAGAIN);
1382 /* on failure: retry once again after a requested rescan */
1383 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1384 do {
1385 rc = _zcrypt_send_ep11_cprb(perms, &xcrb);
1386 } while (rc == -EAGAIN);
1387 if (rc)
1388 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1389 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1390 return -EFAULT;
1391 return rc;
1392}
1393
1394static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1395 unsigned long arg)
1396{
1397 int rc;
1398 struct ap_perms *perms =
1399 (struct ap_perms *) filp->private_data;
1400
1401 rc = zcrypt_check_ioctl(perms, cmd);
1402 if (rc)
1403 return rc;
1404
1405 switch (cmd) {
1406 case ICARSAMODEXPO:
1407 return icarsamodexpo_ioctl(perms, arg);
1408 case ICARSACRT:
1409 return icarsacrt_ioctl(perms, arg);
1410 case ZSECSENDCPRB:
1411 return zsecsendcprb_ioctl(perms, arg);
1412 case ZSENDEP11CPRB:
1413 return zsendep11cprb_ioctl(perms, arg);
1414 case ZCRYPT_DEVICE_STATUS: {
1415 struct zcrypt_device_status_ext *device_status;
1416 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1417 * sizeof(struct zcrypt_device_status_ext);
1418
1419 device_status = kzalloc(total_size, GFP_KERNEL);
1420 if (!device_status)
1421 return -ENOMEM;
1422 zcrypt_device_status_mask_ext(device_status);
1423 if (copy_to_user((char __user *) arg, device_status,
1424 total_size))
1425 rc = -EFAULT;
1426 kfree(device_status);
1427 return rc;
1428 }
1429 case ZCRYPT_STATUS_MASK: {
1430 char status[AP_DEVICES];
1431
1432 zcrypt_status_mask(status, AP_DEVICES);
1433 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1434 return -EFAULT;
1435 return 0;
1436 }
1437 case ZCRYPT_QDEPTH_MASK: {
1438 char qdepth[AP_DEVICES];
1439
1440 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1441 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1442 return -EFAULT;
1443 return 0;
1444 }
1445 case ZCRYPT_PERDEV_REQCNT: {
1446 u32 *reqcnt;
1447
1448 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1449 if (!reqcnt)
1450 return -ENOMEM;
1451 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1452 if (copy_to_user((int __user *) arg, reqcnt,
1453 sizeof(u32) * AP_DEVICES))
1454 rc = -EFAULT;
1455 kfree(reqcnt);
1456 return rc;
1457 }
1458 case Z90STAT_REQUESTQ_COUNT:
1459 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1460 case Z90STAT_PENDINGQ_COUNT:
1461 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1462 case Z90STAT_TOTALOPEN_COUNT:
1463 return put_user(atomic_read(&zcrypt_open_count),
1464 (int __user *) arg);
1465 case Z90STAT_DOMAIN_INDEX:
1466 return put_user(ap_domain_index, (int __user *) arg);
1467 /*
1468 * Deprecated ioctls
1469 */
1470 case ZDEVICESTATUS: {
1471 /* the old ioctl supports only 64 adapters */
1472 struct zcrypt_device_status *device_status;
1473 size_t total_size = MAX_ZDEV_ENTRIES
1474 * sizeof(struct zcrypt_device_status);
1475
1476 device_status = kzalloc(total_size, GFP_KERNEL);
1477 if (!device_status)
1478 return -ENOMEM;
1479 zcrypt_device_status_mask(device_status);
1480 if (copy_to_user((char __user *) arg, device_status,
1481 total_size))
1482 rc = -EFAULT;
1483 kfree(device_status);
1484 return rc;
1485 }
1486 case Z90STAT_STATUS_MASK: {
1487 /* the old ioctl supports only 64 adapters */
1488 char status[MAX_ZDEV_CARDIDS];
1489
1490 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1491 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1492 return -EFAULT;
1493 return 0;
1494 }
1495 case Z90STAT_QDEPTH_MASK: {
1496 /* the old ioctl supports only 64 adapters */
1497 char qdepth[MAX_ZDEV_CARDIDS];
1498
1499 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1500 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1501 return -EFAULT;
1502 return 0;
1503 }
1504 case Z90STAT_PERDEV_REQCNT: {
1505 /* the old ioctl supports only 64 adapters */
1506 u32 reqcnt[MAX_ZDEV_CARDIDS];
1507
1508 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1509 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1510 return -EFAULT;
1511 return 0;
1512 }
1513 /* unknown ioctl number */
1514 default:
1515 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1516 return -ENOIOCTLCMD;
1517 }
1518}
1519
1520#ifdef CONFIG_COMPAT
1521/*
1522 * ioctl32 conversion routines
1523 */
1524struct compat_ica_rsa_modexpo {
1525 compat_uptr_t inputdata;
1526 unsigned int inputdatalength;
1527 compat_uptr_t outputdata;
1528 unsigned int outputdatalength;
1529 compat_uptr_t b_key;
1530 compat_uptr_t n_modulus;
1531};
1532
1533static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1534 unsigned int cmd, unsigned long arg)
1535{
1536 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1537 struct compat_ica_rsa_modexpo mex32;
1538 struct ica_rsa_modexpo mex64;
1539 long rc;
1540
1541 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1542 return -EFAULT;
1543 mex64.inputdata = compat_ptr(mex32.inputdata);
1544 mex64.inputdatalength = mex32.inputdatalength;
1545 mex64.outputdata = compat_ptr(mex32.outputdata);
1546 mex64.outputdatalength = mex32.outputdatalength;
1547 mex64.b_key = compat_ptr(mex32.b_key);
1548 mex64.n_modulus = compat_ptr(mex32.n_modulus);
1549 do {
1550 rc = zcrypt_rsa_modexpo(perms, &mex64);
1551 } while (rc == -EAGAIN);
1552 /* on failure: retry once again after a requested rescan */
1553 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1554 do {
1555 rc = zcrypt_rsa_modexpo(perms, &mex64);
1556 } while (rc == -EAGAIN);
1557 if (rc)
1558 return rc;
1559 return put_user(mex64.outputdatalength,
1560 &umex32->outputdatalength);
1561}
1562
1563struct compat_ica_rsa_modexpo_crt {
1564 compat_uptr_t inputdata;
1565 unsigned int inputdatalength;
1566 compat_uptr_t outputdata;
1567 unsigned int outputdatalength;
1568 compat_uptr_t bp_key;
1569 compat_uptr_t bq_key;
1570 compat_uptr_t np_prime;
1571 compat_uptr_t nq_prime;
1572 compat_uptr_t u_mult_inv;
1573};
1574
1575static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1576 unsigned int cmd, unsigned long arg)
1577{
1578 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1579 struct compat_ica_rsa_modexpo_crt crt32;
1580 struct ica_rsa_modexpo_crt crt64;
1581 long rc;
1582
1583 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1584 return -EFAULT;
1585 crt64.inputdata = compat_ptr(crt32.inputdata);
1586 crt64.inputdatalength = crt32.inputdatalength;
1587 crt64.outputdata = compat_ptr(crt32.outputdata);
1588 crt64.outputdatalength = crt32.outputdatalength;
1589 crt64.bp_key = compat_ptr(crt32.bp_key);
1590 crt64.bq_key = compat_ptr(crt32.bq_key);
1591 crt64.np_prime = compat_ptr(crt32.np_prime);
1592 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1593 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1594 do {
1595 rc = zcrypt_rsa_crt(perms, &crt64);
1596 } while (rc == -EAGAIN);
1597 /* on failure: retry once again after a requested rescan */
1598 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1599 do {
1600 rc = zcrypt_rsa_crt(perms, &crt64);
1601 } while (rc == -EAGAIN);
1602 if (rc)
1603 return rc;
1604 return put_user(crt64.outputdatalength,
1605 &ucrt32->outputdatalength);
1606}
1607
1608struct compat_ica_xcRB {
1609 unsigned short agent_ID;
1610 unsigned int user_defined;
1611 unsigned short request_ID;
1612 unsigned int request_control_blk_length;
1613 unsigned char padding1[16 - sizeof(compat_uptr_t)];
1614 compat_uptr_t request_control_blk_addr;
1615 unsigned int request_data_length;
1616 char padding2[16 - sizeof(compat_uptr_t)];
1617 compat_uptr_t request_data_address;
1618 unsigned int reply_control_blk_length;
1619 char padding3[16 - sizeof(compat_uptr_t)];
1620 compat_uptr_t reply_control_blk_addr;
1621 unsigned int reply_data_length;
1622 char padding4[16 - sizeof(compat_uptr_t)];
1623 compat_uptr_t reply_data_addr;
1624 unsigned short priority_window;
1625 unsigned int status;
1626} __packed;
1627
1628static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1629 unsigned int cmd, unsigned long arg)
1630{
1631 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1632 struct compat_ica_xcRB xcRB32;
1633 struct ica_xcRB xcRB64;
1634 long rc;
1635
1636 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1637 return -EFAULT;
1638 xcRB64.agent_ID = xcRB32.agent_ID;
1639 xcRB64.user_defined = xcRB32.user_defined;
1640 xcRB64.request_ID = xcRB32.request_ID;
1641 xcRB64.request_control_blk_length =
1642 xcRB32.request_control_blk_length;
1643 xcRB64.request_control_blk_addr =
1644 compat_ptr(xcRB32.request_control_blk_addr);
1645 xcRB64.request_data_length =
1646 xcRB32.request_data_length;
1647 xcRB64.request_data_address =
1648 compat_ptr(xcRB32.request_data_address);
1649 xcRB64.reply_control_blk_length =
1650 xcRB32.reply_control_blk_length;
1651 xcRB64.reply_control_blk_addr =
1652 compat_ptr(xcRB32.reply_control_blk_addr);
1653 xcRB64.reply_data_length = xcRB32.reply_data_length;
1654 xcRB64.reply_data_addr =
1655 compat_ptr(xcRB32.reply_data_addr);
1656 xcRB64.priority_window = xcRB32.priority_window;
1657 xcRB64.status = xcRB32.status;
1658 do {
1659 rc = _zcrypt_send_cprb(perms, &xcRB64);
1660 } while (rc == -EAGAIN);
1661 /* on failure: retry once again after a requested rescan */
1662 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1663 do {
1664 rc = _zcrypt_send_cprb(perms, &xcRB64);
1665 } while (rc == -EAGAIN);
1666 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1667 xcRB32.reply_data_length = xcRB64.reply_data_length;
1668 xcRB32.status = xcRB64.status;
1669 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1670 return -EFAULT;
1671 return rc;
1672}
1673
1674static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1675 unsigned long arg)
1676{
1677 int rc;
1678 struct ap_perms *perms =
1679 (struct ap_perms *) filp->private_data;
1680
1681 rc = zcrypt_check_ioctl(perms, cmd);
1682 if (rc)
1683 return rc;
1684
1685 if (cmd == ICARSAMODEXPO)
1686 return trans_modexpo32(perms, filp, cmd, arg);
1687 if (cmd == ICARSACRT)
1688 return trans_modexpo_crt32(perms, filp, cmd, arg);
1689 if (cmd == ZSECSENDCPRB)
1690 return trans_xcRB32(perms, filp, cmd, arg);
1691 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1692}
1693#endif
1694
1695/*
1696 * Misc device file operations.
1697 */
1698static const struct file_operations zcrypt_fops = {
1699 .owner = THIS_MODULE,
1700 .read = zcrypt_read,
1701 .write = zcrypt_write,
1702 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1703#ifdef CONFIG_COMPAT
1704 .compat_ioctl = zcrypt_compat_ioctl,
1705#endif
1706 .open = zcrypt_open,
1707 .release = zcrypt_release,
1708 .llseek = no_llseek,
1709};
1710
1711/*
1712 * Misc device.
1713 */
1714static struct miscdevice zcrypt_misc_device = {
1715 .minor = MISC_DYNAMIC_MINOR,
1716 .name = "z90crypt",
1717 .fops = &zcrypt_fops,
1718};
1719
1720static int zcrypt_rng_device_count;
1721static u32 *zcrypt_rng_buffer;
1722static int zcrypt_rng_buffer_index;
1723static DEFINE_MUTEX(zcrypt_rng_mutex);
1724
1725static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1726{
1727 int rc;
1728
1729 /*
1730 * We don't need locking here because the RNG API guarantees serialized
1731 * read method calls.
1732 */
1733 if (zcrypt_rng_buffer_index == 0) {
1734 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1735 /* on failure: retry once again after a requested rescan */
1736 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1737 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1738 if (rc < 0)
1739 return -EIO;
1740 zcrypt_rng_buffer_index = rc / sizeof(*data);
1741 }
1742 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1743 return sizeof(*data);
1744}
1745
1746static struct hwrng zcrypt_rng_dev = {
1747 .name = "zcrypt",
1748 .data_read = zcrypt_rng_data_read,
1749 .quality = 990,
1750};
1751
1752int zcrypt_rng_device_add(void)
1753{
1754 int rc = 0;
1755
1756 mutex_lock(&zcrypt_rng_mutex);
1757 if (zcrypt_rng_device_count == 0) {
1758 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1759 if (!zcrypt_rng_buffer) {
1760 rc = -ENOMEM;
1761 goto out;
1762 }
1763 zcrypt_rng_buffer_index = 0;
1764 if (!zcrypt_hwrng_seed)
1765 zcrypt_rng_dev.quality = 0;
1766 rc = hwrng_register(&zcrypt_rng_dev);
1767 if (rc)
1768 goto out_free;
1769 zcrypt_rng_device_count = 1;
1770 } else
1771 zcrypt_rng_device_count++;
1772 mutex_unlock(&zcrypt_rng_mutex);
1773 return 0;
1774
1775out_free:
1776 free_page((unsigned long) zcrypt_rng_buffer);
1777out:
1778 mutex_unlock(&zcrypt_rng_mutex);
1779 return rc;
1780}
1781
1782void zcrypt_rng_device_remove(void)
1783{
1784 mutex_lock(&zcrypt_rng_mutex);
1785 zcrypt_rng_device_count--;
1786 if (zcrypt_rng_device_count == 0) {
1787 hwrng_unregister(&zcrypt_rng_dev);
1788 free_page((unsigned long) zcrypt_rng_buffer);
1789 }
1790 mutex_unlock(&zcrypt_rng_mutex);
1791}
1792
1793int __init zcrypt_debug_init(void)
1794{
1795 zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1796 DBF_MAX_SPRINTF_ARGS * sizeof(long));
1797 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1798 debug_set_level(zcrypt_dbf_info, DBF_ERR);
1799
1800 return 0;
1801}
1802
1803void zcrypt_debug_exit(void)
1804{
1805 debug_unregister(zcrypt_dbf_info);
1806}
1807
1808#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1809
1810static int __init zcdn_init(void)
1811{
1812 int rc;
1813
1814 /* create a new class 'zcrypt' */
1815 zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
1816 if (IS_ERR(zcrypt_class)) {
1817 rc = PTR_ERR(zcrypt_class);
1818 goto out_class_create_failed;
1819 }
1820 zcrypt_class->dev_release = zcdn_device_release;
1821
1822 /* alloc device minor range */
1823 rc = alloc_chrdev_region(&zcrypt_devt,
1824 0, ZCRYPT_MAX_MINOR_NODES,
1825 ZCRYPT_NAME);
1826 if (rc)
1827 goto out_alloc_chrdev_failed;
1828
1829 cdev_init(&zcrypt_cdev, &zcrypt_fops);
1830 zcrypt_cdev.owner = THIS_MODULE;
1831 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1832 if (rc)
1833 goto out_cdev_add_failed;
1834
1835 /* need some class specific sysfs attributes */
1836 rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
1837 if (rc)
1838 goto out_class_create_file_1_failed;
1839 rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
1840 if (rc)
1841 goto out_class_create_file_2_failed;
1842
1843 return 0;
1844
1845out_class_create_file_2_failed:
1846 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1847out_class_create_file_1_failed:
1848 cdev_del(&zcrypt_cdev);
1849out_cdev_add_failed:
1850 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1851out_alloc_chrdev_failed:
1852 class_destroy(zcrypt_class);
1853out_class_create_failed:
1854 return rc;
1855}
1856
1857static void zcdn_exit(void)
1858{
1859 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1860 class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
1861 zcdn_destroy_all();
1862 cdev_del(&zcrypt_cdev);
1863 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1864 class_destroy(zcrypt_class);
1865}
1866
1867#endif
1868
1869/**
1870 * zcrypt_api_init(): Module initialization.
1871 *
1872 * The module initialization code.
1873 */
1874int __init zcrypt_api_init(void)
1875{
1876 int rc;
1877
1878 rc = zcrypt_debug_init();
1879 if (rc)
1880 goto out;
1881
1882#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1883 rc = zcdn_init();
1884 if (rc)
1885 goto out;
1886#endif
1887
1888 /* Register the request sprayer. */
1889 rc = misc_register(&zcrypt_misc_device);
1890 if (rc < 0)
1891 goto out_misc_register_failed;
1892
1893 zcrypt_msgtype6_init();
1894 zcrypt_msgtype50_init();
1895
1896 return 0;
1897
1898out_misc_register_failed:
1899#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1900 zcdn_exit();
1901#endif
1902 zcrypt_debug_exit();
1903out:
1904 return rc;
1905}
1906
1907/**
1908 * zcrypt_api_exit(): Module termination.
1909 *
1910 * The module termination code.
1911 */
1912void __exit zcrypt_api_exit(void)
1913{
1914#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1915 zcdn_exit();
1916#endif
1917 misc_deregister(&zcrypt_misc_device);
1918 zcrypt_msgtype6_exit();
1919 zcrypt_msgtype50_exit();
1920 zcrypt_ccamisc_exit();
1921 zcrypt_ep11misc_exit();
1922 zcrypt_debug_exit();
1923}
1924
1925module_init(zcrypt_api_init);
1926module_exit(zcrypt_api_exit);