Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
[muen/linux.git] / drivers / s390 / crypto / zcrypt_api.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  *  zcrypt 2.1.0
4  *
5  *  Copyright IBM Corp. 2001, 2012
6  *  Author(s): Robert Burroughs
7  *             Eric Rossman (edrossma@us.ibm.com)
8  *             Cornelia Huck <cornelia.huck@de.ibm.com>
9  *
10  *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
11  *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
12  *                                Ralph Wuerthner <rwuerthn@de.ibm.com>
13  *  MSGTYPE restruct:             Holger Dengler <hd@linux.vnet.ibm.com>
14  */
15
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/interrupt.h>
19 #include <linux/miscdevice.h>
20 #include <linux/fs.h>
21 #include <linux/compat.h>
22 #include <linux/slab.h>
23 #include <linux/atomic.h>
24 #include <linux/uaccess.h>
25 #include <linux/hw_random.h>
26 #include <linux/debugfs.h>
27 #include <asm/debug.h>
28
29 #define CREATE_TRACE_POINTS
30 #include <asm/trace/zcrypt.h>
31
32 #include "zcrypt_api.h"
33 #include "zcrypt_debug.h"
34
35 #include "zcrypt_msgtype6.h"
36 #include "zcrypt_msgtype50.h"
37
38 /*
39  * Module description.
40  */
41 MODULE_AUTHOR("IBM Corporation");
42 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
43                    "Copyright IBM Corp. 2001, 2012");
44 MODULE_LICENSE("GPL");
45
46 /*
47  * zcrypt tracepoint functions
48  */
49 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
50 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
51
52 static int zcrypt_hwrng_seed = 1;
53 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, S_IRUSR|S_IRGRP);
54 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
55
56 DEFINE_SPINLOCK(zcrypt_list_lock);
57 LIST_HEAD(zcrypt_card_list);
58 int zcrypt_device_count;
59
60 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
61 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
62
63 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
64 EXPORT_SYMBOL(zcrypt_rescan_req);
65
66 static LIST_HEAD(zcrypt_ops_list);
67
68 /* Zcrypt related debug feature stuff. */
69 debug_info_t *zcrypt_dbf_info;
70
71 /**
72  * Process a rescan of the transport layer.
73  *
74  * Returns 1, if the rescan has been processed, otherwise 0.
75  */
76 static inline int zcrypt_process_rescan(void)
77 {
78         if (atomic_read(&zcrypt_rescan_req)) {
79                 atomic_set(&zcrypt_rescan_req, 0);
80                 atomic_inc(&zcrypt_rescan_count);
81                 ap_bus_force_rescan();
82                 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
83                            atomic_inc_return(&zcrypt_rescan_count));
84                 return 1;
85         }
86         return 0;
87 }
88
89 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
90 {
91         list_add_tail(&zops->list, &zcrypt_ops_list);
92 }
93
94 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
95 {
96         list_del_init(&zops->list);
97 }
98
99 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
100 {
101         struct zcrypt_ops *zops;
102
103         list_for_each_entry(zops, &zcrypt_ops_list, list)
104                 if ((zops->variant == variant) &&
105                     (!strncmp(zops->name, name, sizeof(zops->name))))
106                         return zops;
107         return NULL;
108 }
109 EXPORT_SYMBOL(zcrypt_msgtype);
110
111 /**
112  * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
113  *
114  * This function is not supported beyond zcrypt 1.3.1.
115  */
116 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
117                            size_t count, loff_t *f_pos)
118 {
119         return -EPERM;
120 }
121
122 /**
123  * zcrypt_write(): Not allowed.
124  *
125  * Write is is not allowed
126  */
127 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
128                             size_t count, loff_t *f_pos)
129 {
130         return -EPERM;
131 }
132
133 /**
134  * zcrypt_open(): Count number of users.
135  *
136  * Device open function to count number of users.
137  */
138 static int zcrypt_open(struct inode *inode, struct file *filp)
139 {
140         atomic_inc(&zcrypt_open_count);
141         return nonseekable_open(inode, filp);
142 }
143
144 /**
145  * zcrypt_release(): Count number of users.
146  *
147  * Device close function to count number of users.
148  */
149 static int zcrypt_release(struct inode *inode, struct file *filp)
150 {
151         atomic_dec(&zcrypt_open_count);
152         return 0;
153 }
154
155 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
156                                                      struct zcrypt_queue *zq,
157                                                      unsigned int weight)
158 {
159         if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
160                 return NULL;
161         zcrypt_queue_get(zq);
162         get_device(&zq->queue->ap_dev.device);
163         atomic_add(weight, &zc->load);
164         atomic_add(weight, &zq->load);
165         zq->request_count++;
166         return zq;
167 }
168
169 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
170                                      struct zcrypt_queue *zq,
171                                      unsigned int weight)
172 {
173         struct module *mod = zq->queue->ap_dev.drv->driver.owner;
174
175         zq->request_count--;
176         atomic_sub(weight, &zc->load);
177         atomic_sub(weight, &zq->load);
178         put_device(&zq->queue->ap_dev.device);
179         zcrypt_queue_put(zq);
180         module_put(mod);
181 }
182
183 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
184                                        struct zcrypt_card *pref_zc,
185                                        unsigned weight, unsigned pref_weight)
186 {
187         if (!pref_zc)
188                 return false;
189         weight += atomic_read(&zc->load);
190         pref_weight += atomic_read(&pref_zc->load);
191         if (weight == pref_weight)
192                 return atomic_read(&zc->card->total_request_count) >
193                         atomic_read(&pref_zc->card->total_request_count);
194         return weight > pref_weight;
195 }
196
197 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
198                                         struct zcrypt_queue *pref_zq,
199                                         unsigned weight, unsigned pref_weight)
200 {
201         if (!pref_zq)
202                 return false;
203         weight += atomic_read(&zq->load);
204         pref_weight += atomic_read(&pref_zq->load);
205         if (weight == pref_weight)
206                 return zq->queue->total_request_count >
207                         pref_zq->queue->total_request_count;
208         return weight > pref_weight;
209 }
210
211 /*
212  * zcrypt ioctls.
213  */
214 static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
215 {
216         struct zcrypt_card *zc, *pref_zc;
217         struct zcrypt_queue *zq, *pref_zq;
218         unsigned int weight, pref_weight;
219         unsigned int func_code;
220         int qid = 0, rc = -ENODEV;
221
222         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
223
224         if (mex->outputdatalength < mex->inputdatalength) {
225                 rc = -EINVAL;
226                 goto out;
227         }
228
229         /*
230          * As long as outputdatalength is big enough, we can set the
231          * outputdatalength equal to the inputdatalength, since that is the
232          * number of bytes we will copy in any case
233          */
234         mex->outputdatalength = mex->inputdatalength;
235
236         rc = get_rsa_modex_fc(mex, &func_code);
237         if (rc)
238                 goto out;
239
240         pref_zc = NULL;
241         pref_zq = NULL;
242         spin_lock(&zcrypt_list_lock);
243         for_each_zcrypt_card(zc) {
244                 /* Check for online accelarator and CCA cards */
245                 if (!zc->online || !(zc->card->functions & 0x18000000))
246                         continue;
247                 /* Check for size limits */
248                 if (zc->min_mod_size > mex->inputdatalength ||
249                     zc->max_mod_size < mex->inputdatalength)
250                         continue;
251                 /* get weight index of the card device  */
252                 weight = zc->speed_rating[func_code];
253                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
254                         continue;
255                 for_each_zcrypt_queue(zq, zc) {
256                         /* check if device is online and eligible */
257                         if (!zq->online || !zq->ops->rsa_modexpo)
258                                 continue;
259                         if (zcrypt_queue_compare(zq, pref_zq,
260                                                  weight, pref_weight))
261                                 continue;
262                         pref_zc = zc;
263                         pref_zq = zq;
264                         pref_weight = weight;
265                 }
266         }
267         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
268         spin_unlock(&zcrypt_list_lock);
269
270         if (!pref_zq) {
271                 rc = -ENODEV;
272                 goto out;
273         }
274
275         qid = pref_zq->queue->qid;
276         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
277
278         spin_lock(&zcrypt_list_lock);
279         zcrypt_drop_queue(pref_zc, pref_zq, weight);
280         spin_unlock(&zcrypt_list_lock);
281
282 out:
283         trace_s390_zcrypt_rep(mex, func_code, rc,
284                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
285         return rc;
286 }
287
288 static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
289 {
290         struct zcrypt_card *zc, *pref_zc;
291         struct zcrypt_queue *zq, *pref_zq;
292         unsigned int weight, pref_weight;
293         unsigned int func_code;
294         int qid = 0, rc = -ENODEV;
295
296         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
297
298         if (crt->outputdatalength < crt->inputdatalength) {
299                 rc = -EINVAL;
300                 goto out;
301         }
302
303         /*
304          * As long as outputdatalength is big enough, we can set the
305          * outputdatalength equal to the inputdatalength, since that is the
306          * number of bytes we will copy in any case
307          */
308         crt->outputdatalength = crt->inputdatalength;
309
310         rc = get_rsa_crt_fc(crt, &func_code);
311         if (rc)
312                 goto out;
313
314         pref_zc = NULL;
315         pref_zq = NULL;
316         spin_lock(&zcrypt_list_lock);
317         for_each_zcrypt_card(zc) {
318                 /* Check for online accelarator and CCA cards */
319                 if (!zc->online || !(zc->card->functions & 0x18000000))
320                         continue;
321                 /* Check for size limits */
322                 if (zc->min_mod_size > crt->inputdatalength ||
323                     zc->max_mod_size < crt->inputdatalength)
324                         continue;
325                 /* get weight index of the card device  */
326                 weight = zc->speed_rating[func_code];
327                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
328                         continue;
329                 for_each_zcrypt_queue(zq, zc) {
330                         /* check if device is online and eligible */
331                         if (!zq->online || !zq->ops->rsa_modexpo_crt)
332                                 continue;
333                         if (zcrypt_queue_compare(zq, pref_zq,
334                                                  weight, pref_weight))
335                                 continue;
336                         pref_zc = zc;
337                         pref_zq = zq;
338                         pref_weight = weight;
339                 }
340         }
341         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
342         spin_unlock(&zcrypt_list_lock);
343
344         if (!pref_zq) {
345                 rc = -ENODEV;
346                 goto out;
347         }
348
349         qid = pref_zq->queue->qid;
350         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
351
352         spin_lock(&zcrypt_list_lock);
353         zcrypt_drop_queue(pref_zc, pref_zq, weight);
354         spin_unlock(&zcrypt_list_lock);
355
356 out:
357         trace_s390_zcrypt_rep(crt, func_code, rc,
358                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
359         return rc;
360 }
361
362 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
363 {
364         struct zcrypt_card *zc, *pref_zc;
365         struct zcrypt_queue *zq, *pref_zq;
366         struct ap_message ap_msg;
367         unsigned int weight, pref_weight;
368         unsigned int func_code;
369         unsigned short *domain;
370         int qid = 0, rc = -ENODEV;
371
372         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
373
374         rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
375         if (rc)
376                 goto out;
377
378         pref_zc = NULL;
379         pref_zq = NULL;
380         spin_lock(&zcrypt_list_lock);
381         for_each_zcrypt_card(zc) {
382                 /* Check for online CCA cards */
383                 if (!zc->online || !(zc->card->functions & 0x10000000))
384                         continue;
385                 /* Check for user selected CCA card */
386                 if (xcRB->user_defined != AUTOSELECT &&
387                     xcRB->user_defined != zc->card->id)
388                         continue;
389                 /* get weight index of the card device  */
390                 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
391                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
392                         continue;
393                 for_each_zcrypt_queue(zq, zc) {
394                         /* check if device is online and eligible */
395                         if (!zq->online ||
396                             !zq->ops->send_cprb ||
397                             ((*domain != (unsigned short) AUTOSELECT) &&
398                              (*domain != AP_QID_QUEUE(zq->queue->qid))))
399                                 continue;
400                         if (zcrypt_queue_compare(zq, pref_zq,
401                                                  weight, pref_weight))
402                                 continue;
403                         pref_zc = zc;
404                         pref_zq = zq;
405                         pref_weight = weight;
406                 }
407         }
408         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
409         spin_unlock(&zcrypt_list_lock);
410
411         if (!pref_zq) {
412                 rc = -ENODEV;
413                 goto out;
414         }
415
416         /* in case of auto select, provide the correct domain */
417         qid = pref_zq->queue->qid;
418         if (*domain == (unsigned short) AUTOSELECT)
419                 *domain = AP_QID_QUEUE(qid);
420
421         rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
422
423         spin_lock(&zcrypt_list_lock);
424         zcrypt_drop_queue(pref_zc, pref_zq, weight);
425         spin_unlock(&zcrypt_list_lock);
426
427 out:
428         trace_s390_zcrypt_rep(xcRB, func_code, rc,
429                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
430         return rc;
431 }
432 EXPORT_SYMBOL(zcrypt_send_cprb);
433
434 static bool is_desired_ep11_card(unsigned int dev_id,
435                                  unsigned short target_num,
436                                  struct ep11_target_dev *targets)
437 {
438         while (target_num-- > 0) {
439                 if (dev_id == targets->ap_id)
440                         return true;
441                 targets++;
442         }
443         return false;
444 }
445
446 static bool is_desired_ep11_queue(unsigned int dev_qid,
447                                   unsigned short target_num,
448                                   struct ep11_target_dev *targets)
449 {
450         while (target_num-- > 0) {
451                 if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
452                         return true;
453                 targets++;
454         }
455         return false;
456 }
457
458 static long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
459 {
460         struct zcrypt_card *zc, *pref_zc;
461         struct zcrypt_queue *zq, *pref_zq;
462         struct ep11_target_dev *targets;
463         unsigned short target_num;
464         unsigned int weight, pref_weight;
465         unsigned int func_code;
466         struct ap_message ap_msg;
467         int qid = 0, rc = -ENODEV;
468
469         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
470
471         target_num = (unsigned short) xcrb->targets_num;
472
473         /* empty list indicates autoselect (all available targets) */
474         targets = NULL;
475         if (target_num != 0) {
476                 struct ep11_target_dev __user *uptr;
477
478                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
479                 if (!targets) {
480                         rc = -ENOMEM;
481                         goto out;
482                 }
483
484                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
485                 if (copy_from_user(targets, uptr,
486                                    target_num * sizeof(*targets))) {
487                         rc = -EFAULT;
488                         goto out;
489                 }
490         }
491
492         rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
493         if (rc)
494                 goto out_free;
495
496         pref_zc = NULL;
497         pref_zq = NULL;
498         spin_lock(&zcrypt_list_lock);
499         for_each_zcrypt_card(zc) {
500                 /* Check for online EP11 cards */
501                 if (!zc->online || !(zc->card->functions & 0x04000000))
502                         continue;
503                 /* Check for user selected EP11 card */
504                 if (targets &&
505                     !is_desired_ep11_card(zc->card->id, target_num, targets))
506                         continue;
507                 /* get weight index of the card device  */
508                 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
509                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
510                         continue;
511                 for_each_zcrypt_queue(zq, zc) {
512                         /* check if device is online and eligible */
513                         if (!zq->online ||
514                             !zq->ops->send_ep11_cprb ||
515                             (targets &&
516                              !is_desired_ep11_queue(zq->queue->qid,
517                                                     target_num, targets)))
518                                 continue;
519                         if (zcrypt_queue_compare(zq, pref_zq,
520                                                  weight, pref_weight))
521                                 continue;
522                         pref_zc = zc;
523                         pref_zq = zq;
524                         pref_weight = weight;
525                 }
526         }
527         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
528         spin_unlock(&zcrypt_list_lock);
529
530         if (!pref_zq) {
531                 rc = -ENODEV;
532                 goto out_free;
533         }
534
535         qid = pref_zq->queue->qid;
536         rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
537
538         spin_lock(&zcrypt_list_lock);
539         zcrypt_drop_queue(pref_zc, pref_zq, weight);
540         spin_unlock(&zcrypt_list_lock);
541
542 out_free:
543         kfree(targets);
544 out:
545         trace_s390_zcrypt_rep(xcrb, func_code, rc,
546                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
547         return rc;
548 }
549
550 static long zcrypt_rng(char *buffer)
551 {
552         struct zcrypt_card *zc, *pref_zc;
553         struct zcrypt_queue *zq, *pref_zq;
554         unsigned int weight, pref_weight;
555         unsigned int func_code;
556         struct ap_message ap_msg;
557         unsigned int domain;
558         int qid = 0, rc = -ENODEV;
559
560         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
561
562         rc = get_rng_fc(&ap_msg, &func_code, &domain);
563         if (rc)
564                 goto out;
565
566         pref_zc = NULL;
567         pref_zq = NULL;
568         spin_lock(&zcrypt_list_lock);
569         for_each_zcrypt_card(zc) {
570                 /* Check for online CCA cards */
571                 if (!zc->online || !(zc->card->functions & 0x10000000))
572                         continue;
573                 /* get weight index of the card device  */
574                 weight = zc->speed_rating[func_code];
575                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
576                         continue;
577                 for_each_zcrypt_queue(zq, zc) {
578                         /* check if device is online and eligible */
579                         if (!zq->online || !zq->ops->rng)
580                                 continue;
581                         if (zcrypt_queue_compare(zq, pref_zq,
582                                                  weight, pref_weight))
583                                 continue;
584                         pref_zc = zc;
585                         pref_zq = zq;
586                         pref_weight = weight;
587                 }
588         }
589         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
590         spin_unlock(&zcrypt_list_lock);
591
592         if (!pref_zq)
593                 return -ENODEV;
594
595         qid = pref_zq->queue->qid;
596         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
597
598         spin_lock(&zcrypt_list_lock);
599         zcrypt_drop_queue(pref_zc, pref_zq, weight);
600         spin_unlock(&zcrypt_list_lock);
601
602 out:
603         trace_s390_zcrypt_rep(buffer, func_code, rc,
604                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
605         return rc;
606 }
607
608 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
609 {
610         struct zcrypt_card *zc;
611         struct zcrypt_queue *zq;
612         struct zcrypt_device_status *stat;
613         int card, queue;
614
615         memset(devstatus, 0, MAX_ZDEV_ENTRIES
616                * sizeof(struct zcrypt_device_status));
617
618         spin_lock(&zcrypt_list_lock);
619         for_each_zcrypt_card(zc) {
620                 for_each_zcrypt_queue(zq, zc) {
621                         card = AP_QID_CARD(zq->queue->qid);
622                         if (card >= MAX_ZDEV_CARDIDS)
623                                 continue;
624                         queue = AP_QID_QUEUE(zq->queue->qid);
625                         stat = &devstatus[card * AP_DOMAINS + queue];
626                         stat->hwtype = zc->card->ap_dev.device_type;
627                         stat->functions = zc->card->functions >> 26;
628                         stat->qid = zq->queue->qid;
629                         stat->online = zq->online ? 0x01 : 0x00;
630                 }
631         }
632         spin_unlock(&zcrypt_list_lock);
633 }
634
635 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
636 {
637         struct zcrypt_card *zc;
638         struct zcrypt_queue *zq;
639         struct zcrypt_device_status_ext *stat;
640         int card, queue;
641
642         memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
643                * sizeof(struct zcrypt_device_status_ext));
644
645         spin_lock(&zcrypt_list_lock);
646         for_each_zcrypt_card(zc) {
647                 for_each_zcrypt_queue(zq, zc) {
648                         card = AP_QID_CARD(zq->queue->qid);
649                         queue = AP_QID_QUEUE(zq->queue->qid);
650                         stat = &devstatus[card * AP_DOMAINS + queue];
651                         stat->hwtype = zc->card->ap_dev.device_type;
652                         stat->functions = zc->card->functions >> 26;
653                         stat->qid = zq->queue->qid;
654                         stat->online = zq->online ? 0x01 : 0x00;
655                 }
656         }
657         spin_unlock(&zcrypt_list_lock);
658 }
659 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
660
661 static void zcrypt_status_mask(char status[], size_t max_adapters)
662 {
663         struct zcrypt_card *zc;
664         struct zcrypt_queue *zq;
665         int card;
666
667         memset(status, 0, max_adapters);
668         spin_lock(&zcrypt_list_lock);
669         for_each_zcrypt_card(zc) {
670                 for_each_zcrypt_queue(zq, zc) {
671                         card = AP_QID_CARD(zq->queue->qid);
672                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
673                             || card >= max_adapters)
674                                 continue;
675                         status[card] = zc->online ? zc->user_space_type : 0x0d;
676                 }
677         }
678         spin_unlock(&zcrypt_list_lock);
679 }
680
681 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
682 {
683         struct zcrypt_card *zc;
684         struct zcrypt_queue *zq;
685         int card;
686
687         memset(qdepth, 0, max_adapters);
688         spin_lock(&zcrypt_list_lock);
689         local_bh_disable();
690         for_each_zcrypt_card(zc) {
691                 for_each_zcrypt_queue(zq, zc) {
692                         card = AP_QID_CARD(zq->queue->qid);
693                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
694                             || card >= max_adapters)
695                                 continue;
696                         spin_lock(&zq->queue->lock);
697                         qdepth[card] =
698                                 zq->queue->pendingq_count +
699                                 zq->queue->requestq_count;
700                         spin_unlock(&zq->queue->lock);
701                 }
702         }
703         local_bh_enable();
704         spin_unlock(&zcrypt_list_lock);
705 }
706
707 static void zcrypt_perdev_reqcnt(int reqcnt[], size_t max_adapters)
708 {
709         struct zcrypt_card *zc;
710         struct zcrypt_queue *zq;
711         int card;
712
713         memset(reqcnt, 0, sizeof(int) * max_adapters);
714         spin_lock(&zcrypt_list_lock);
715         local_bh_disable();
716         for_each_zcrypt_card(zc) {
717                 for_each_zcrypt_queue(zq, zc) {
718                         card = AP_QID_CARD(zq->queue->qid);
719                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
720                             || card >= max_adapters)
721                                 continue;
722                         spin_lock(&zq->queue->lock);
723                         reqcnt[card] = zq->queue->total_request_count;
724                         spin_unlock(&zq->queue->lock);
725                 }
726         }
727         local_bh_enable();
728         spin_unlock(&zcrypt_list_lock);
729 }
730
731 static int zcrypt_pendingq_count(void)
732 {
733         struct zcrypt_card *zc;
734         struct zcrypt_queue *zq;
735         int pendingq_count;
736
737         pendingq_count = 0;
738         spin_lock(&zcrypt_list_lock);
739         local_bh_disable();
740         for_each_zcrypt_card(zc) {
741                 for_each_zcrypt_queue(zq, zc) {
742                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
743                                 continue;
744                         spin_lock(&zq->queue->lock);
745                         pendingq_count += zq->queue->pendingq_count;
746                         spin_unlock(&zq->queue->lock);
747                 }
748         }
749         local_bh_enable();
750         spin_unlock(&zcrypt_list_lock);
751         return pendingq_count;
752 }
753
754 static int zcrypt_requestq_count(void)
755 {
756         struct zcrypt_card *zc;
757         struct zcrypt_queue *zq;
758         int requestq_count;
759
760         requestq_count = 0;
761         spin_lock(&zcrypt_list_lock);
762         local_bh_disable();
763         for_each_zcrypt_card(zc) {
764                 for_each_zcrypt_queue(zq, zc) {
765                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
766                                 continue;
767                         spin_lock(&zq->queue->lock);
768                         requestq_count += zq->queue->requestq_count;
769                         spin_unlock(&zq->queue->lock);
770                 }
771         }
772         local_bh_enable();
773         spin_unlock(&zcrypt_list_lock);
774         return requestq_count;
775 }
776
777 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
778                                   unsigned long arg)
779 {
780         int rc = 0;
781
782         switch (cmd) {
783         case ICARSAMODEXPO: {
784                 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
785                 struct ica_rsa_modexpo mex;
786                 if (copy_from_user(&mex, umex, sizeof(mex)))
787                         return -EFAULT;
788                 do {
789                         rc = zcrypt_rsa_modexpo(&mex);
790                 } while (rc == -EAGAIN);
791                 /* on failure: retry once again after a requested rescan */
792                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
793                         do {
794                                 rc = zcrypt_rsa_modexpo(&mex);
795                         } while (rc == -EAGAIN);
796                 if (rc) {
797                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
798                         return rc;
799                 }
800                 return put_user(mex.outputdatalength, &umex->outputdatalength);
801         }
802         case ICARSACRT: {
803                 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
804                 struct ica_rsa_modexpo_crt crt;
805                 if (copy_from_user(&crt, ucrt, sizeof(crt)))
806                         return -EFAULT;
807                 do {
808                         rc = zcrypt_rsa_crt(&crt);
809                 } while (rc == -EAGAIN);
810                 /* on failure: retry once again after a requested rescan */
811                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
812                         do {
813                                 rc = zcrypt_rsa_crt(&crt);
814                         } while (rc == -EAGAIN);
815                 if (rc) {
816                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
817                         return rc;
818                 }
819                 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
820         }
821         case ZSECSENDCPRB: {
822                 struct ica_xcRB __user *uxcRB = (void __user *) arg;
823                 struct ica_xcRB xcRB;
824                 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
825                         return -EFAULT;
826                 do {
827                         rc = zcrypt_send_cprb(&xcRB);
828                 } while (rc == -EAGAIN);
829                 /* on failure: retry once again after a requested rescan */
830                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
831                         do {
832                                 rc = zcrypt_send_cprb(&xcRB);
833                         } while (rc == -EAGAIN);
834                 if (rc)
835                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d\n", rc);
836                 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
837                         return -EFAULT;
838                 return rc;
839         }
840         case ZSENDEP11CPRB: {
841                 struct ep11_urb __user *uxcrb = (void __user *)arg;
842                 struct ep11_urb xcrb;
843                 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
844                         return -EFAULT;
845                 do {
846                         rc = zcrypt_send_ep11_cprb(&xcrb);
847                 } while (rc == -EAGAIN);
848                 /* on failure: retry once again after a requested rescan */
849                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
850                         do {
851                                 rc = zcrypt_send_ep11_cprb(&xcrb);
852                         } while (rc == -EAGAIN);
853                 if (rc)
854                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
855                 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
856                         return -EFAULT;
857                 return rc;
858         }
859         case ZCRYPT_DEVICE_STATUS: {
860                 struct zcrypt_device_status_ext *device_status;
861                 size_t total_size = MAX_ZDEV_ENTRIES_EXT
862                         * sizeof(struct zcrypt_device_status_ext);
863
864                 device_status = kzalloc(total_size, GFP_KERNEL);
865                 if (!device_status)
866                         return -ENOMEM;
867                 zcrypt_device_status_mask_ext(device_status);
868                 if (copy_to_user((char __user *) arg, device_status,
869                                  total_size))
870                         rc = -EFAULT;
871                 kfree(device_status);
872                 return rc;
873         }
874         case ZCRYPT_STATUS_MASK: {
875                 char status[AP_DEVICES];
876
877                 zcrypt_status_mask(status, AP_DEVICES);
878                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
879                         return -EFAULT;
880                 return 0;
881         }
882         case ZCRYPT_QDEPTH_MASK: {
883                 char qdepth[AP_DEVICES];
884
885                 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
886                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
887                         return -EFAULT;
888                 return 0;
889         }
890         case ZCRYPT_PERDEV_REQCNT: {
891                 int *reqcnt;
892
893                 reqcnt = kcalloc(AP_DEVICES, sizeof(int), GFP_KERNEL);
894                 if (!reqcnt)
895                         return -ENOMEM;
896                 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
897                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
898                         rc = -EFAULT;
899                 kfree(reqcnt);
900                 return rc;
901         }
902         case Z90STAT_REQUESTQ_COUNT:
903                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
904         case Z90STAT_PENDINGQ_COUNT:
905                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
906         case Z90STAT_TOTALOPEN_COUNT:
907                 return put_user(atomic_read(&zcrypt_open_count),
908                                 (int __user *) arg);
909         case Z90STAT_DOMAIN_INDEX:
910                 return put_user(ap_domain_index, (int __user *) arg);
911         /*
912          * Deprecated ioctls
913          */
914         case ZDEVICESTATUS: {
915                 /* the old ioctl supports only 64 adapters */
916                 struct zcrypt_device_status *device_status;
917                 size_t total_size = MAX_ZDEV_ENTRIES
918                         * sizeof(struct zcrypt_device_status);
919
920                 device_status = kzalloc(total_size, GFP_KERNEL);
921                 if (!device_status)
922                         return -ENOMEM;
923                 zcrypt_device_status_mask(device_status);
924                 if (copy_to_user((char __user *) arg, device_status,
925                                  total_size))
926                         rc = -EFAULT;
927                 kfree(device_status);
928                 return rc;
929         }
930         case Z90STAT_STATUS_MASK: {
931                 /* the old ioctl supports only 64 adapters */
932                 char status[MAX_ZDEV_CARDIDS];
933
934                 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
935                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
936                         return -EFAULT;
937                 return 0;
938         }
939         case Z90STAT_QDEPTH_MASK: {
940                 /* the old ioctl supports only 64 adapters */
941                 char qdepth[MAX_ZDEV_CARDIDS];
942
943                 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
944                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
945                         return -EFAULT;
946                 return 0;
947         }
948         case Z90STAT_PERDEV_REQCNT: {
949                 /* the old ioctl supports only 64 adapters */
950                 int reqcnt[MAX_ZDEV_CARDIDS];
951
952                 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
953                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
954                         return -EFAULT;
955                 return 0;
956         }
957         /* unknown ioctl number */
958         default:
959                 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
960                 return -ENOIOCTLCMD;
961         }
962 }
963
964 #ifdef CONFIG_COMPAT
965 /*
966  * ioctl32 conversion routines
967  */
968 struct compat_ica_rsa_modexpo {
969         compat_uptr_t   inputdata;
970         unsigned int    inputdatalength;
971         compat_uptr_t   outputdata;
972         unsigned int    outputdatalength;
973         compat_uptr_t   b_key;
974         compat_uptr_t   n_modulus;
975 };
976
977 static long trans_modexpo32(struct file *filp, unsigned int cmd,
978                             unsigned long arg)
979 {
980         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
981         struct compat_ica_rsa_modexpo mex32;
982         struct ica_rsa_modexpo mex64;
983         long rc;
984
985         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
986                 return -EFAULT;
987         mex64.inputdata = compat_ptr(mex32.inputdata);
988         mex64.inputdatalength = mex32.inputdatalength;
989         mex64.outputdata = compat_ptr(mex32.outputdata);
990         mex64.outputdatalength = mex32.outputdatalength;
991         mex64.b_key = compat_ptr(mex32.b_key);
992         mex64.n_modulus = compat_ptr(mex32.n_modulus);
993         do {
994                 rc = zcrypt_rsa_modexpo(&mex64);
995         } while (rc == -EAGAIN);
996         /* on failure: retry once again after a requested rescan */
997         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
998                 do {
999                         rc = zcrypt_rsa_modexpo(&mex64);
1000                 } while (rc == -EAGAIN);
1001         if (rc)
1002                 return rc;
1003         return put_user(mex64.outputdatalength,
1004                         &umex32->outputdatalength);
1005 }
1006
1007 struct compat_ica_rsa_modexpo_crt {
1008         compat_uptr_t   inputdata;
1009         unsigned int    inputdatalength;
1010         compat_uptr_t   outputdata;
1011         unsigned int    outputdatalength;
1012         compat_uptr_t   bp_key;
1013         compat_uptr_t   bq_key;
1014         compat_uptr_t   np_prime;
1015         compat_uptr_t   nq_prime;
1016         compat_uptr_t   u_mult_inv;
1017 };
1018
1019 static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
1020                                 unsigned long arg)
1021 {
1022         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1023         struct compat_ica_rsa_modexpo_crt crt32;
1024         struct ica_rsa_modexpo_crt crt64;
1025         long rc;
1026
1027         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1028                 return -EFAULT;
1029         crt64.inputdata = compat_ptr(crt32.inputdata);
1030         crt64.inputdatalength = crt32.inputdatalength;
1031         crt64.outputdata=  compat_ptr(crt32.outputdata);
1032         crt64.outputdatalength = crt32.outputdatalength;
1033         crt64.bp_key = compat_ptr(crt32.bp_key);
1034         crt64.bq_key = compat_ptr(crt32.bq_key);
1035         crt64.np_prime = compat_ptr(crt32.np_prime);
1036         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1037         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1038         do {
1039                 rc = zcrypt_rsa_crt(&crt64);
1040         } while (rc == -EAGAIN);
1041         /* on failure: retry once again after a requested rescan */
1042         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1043                 do {
1044                         rc = zcrypt_rsa_crt(&crt64);
1045                 } while (rc == -EAGAIN);
1046         if (rc)
1047                 return rc;
1048         return put_user(crt64.outputdatalength,
1049                         &ucrt32->outputdatalength);
1050 }
1051
1052 struct compat_ica_xcRB {
1053         unsigned short  agent_ID;
1054         unsigned int    user_defined;
1055         unsigned short  request_ID;
1056         unsigned int    request_control_blk_length;
1057         unsigned char   padding1[16 - sizeof (compat_uptr_t)];
1058         compat_uptr_t   request_control_blk_addr;
1059         unsigned int    request_data_length;
1060         char            padding2[16 - sizeof (compat_uptr_t)];
1061         compat_uptr_t   request_data_address;
1062         unsigned int    reply_control_blk_length;
1063         char            padding3[16 - sizeof (compat_uptr_t)];
1064         compat_uptr_t   reply_control_blk_addr;
1065         unsigned int    reply_data_length;
1066         char            padding4[16 - sizeof (compat_uptr_t)];
1067         compat_uptr_t   reply_data_addr;
1068         unsigned short  priority_window;
1069         unsigned int    status;
1070 } __attribute__((packed));
1071
1072 static long trans_xcRB32(struct file *filp, unsigned int cmd,
1073                          unsigned long arg)
1074 {
1075         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1076         struct compat_ica_xcRB xcRB32;
1077         struct ica_xcRB xcRB64;
1078         long rc;
1079
1080         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1081                 return -EFAULT;
1082         xcRB64.agent_ID = xcRB32.agent_ID;
1083         xcRB64.user_defined = xcRB32.user_defined;
1084         xcRB64.request_ID = xcRB32.request_ID;
1085         xcRB64.request_control_blk_length =
1086                 xcRB32.request_control_blk_length;
1087         xcRB64.request_control_blk_addr =
1088                 compat_ptr(xcRB32.request_control_blk_addr);
1089         xcRB64.request_data_length =
1090                 xcRB32.request_data_length;
1091         xcRB64.request_data_address =
1092                 compat_ptr(xcRB32.request_data_address);
1093         xcRB64.reply_control_blk_length =
1094                 xcRB32.reply_control_blk_length;
1095         xcRB64.reply_control_blk_addr =
1096                 compat_ptr(xcRB32.reply_control_blk_addr);
1097         xcRB64.reply_data_length = xcRB32.reply_data_length;
1098         xcRB64.reply_data_addr =
1099                 compat_ptr(xcRB32.reply_data_addr);
1100         xcRB64.priority_window = xcRB32.priority_window;
1101         xcRB64.status = xcRB32.status;
1102         do {
1103                 rc = zcrypt_send_cprb(&xcRB64);
1104         } while (rc == -EAGAIN);
1105         /* on failure: retry once again after a requested rescan */
1106         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1107                 do {
1108                         rc = zcrypt_send_cprb(&xcRB64);
1109                 } while (rc == -EAGAIN);
1110         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1111         xcRB32.reply_data_length = xcRB64.reply_data_length;
1112         xcRB32.status = xcRB64.status;
1113         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1114                         return -EFAULT;
1115         return rc;
1116 }
1117
1118 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1119                          unsigned long arg)
1120 {
1121         if (cmd == ICARSAMODEXPO)
1122                 return trans_modexpo32(filp, cmd, arg);
1123         if (cmd == ICARSACRT)
1124                 return trans_modexpo_crt32(filp, cmd, arg);
1125         if (cmd == ZSECSENDCPRB)
1126                 return trans_xcRB32(filp, cmd, arg);
1127         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1128 }
1129 #endif
1130
1131 /*
1132  * Misc device file operations.
1133  */
1134 static const struct file_operations zcrypt_fops = {
1135         .owner          = THIS_MODULE,
1136         .read           = zcrypt_read,
1137         .write          = zcrypt_write,
1138         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1139 #ifdef CONFIG_COMPAT
1140         .compat_ioctl   = zcrypt_compat_ioctl,
1141 #endif
1142         .open           = zcrypt_open,
1143         .release        = zcrypt_release,
1144         .llseek         = no_llseek,
1145 };
1146
1147 /*
1148  * Misc device.
1149  */
1150 static struct miscdevice zcrypt_misc_device = {
1151         .minor      = MISC_DYNAMIC_MINOR,
1152         .name       = "z90crypt",
1153         .fops       = &zcrypt_fops,
1154 };
1155
1156 static int zcrypt_rng_device_count;
1157 static u32 *zcrypt_rng_buffer;
1158 static int zcrypt_rng_buffer_index;
1159 static DEFINE_MUTEX(zcrypt_rng_mutex);
1160
1161 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1162 {
1163         int rc;
1164
1165         /*
1166          * We don't need locking here because the RNG API guarantees serialized
1167          * read method calls.
1168          */
1169         if (zcrypt_rng_buffer_index == 0) {
1170                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1171                 /* on failure: retry once again after a requested rescan */
1172                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1173                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1174                 if (rc < 0)
1175                         return -EIO;
1176                 zcrypt_rng_buffer_index = rc / sizeof *data;
1177         }
1178         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1179         return sizeof *data;
1180 }
1181
1182 static struct hwrng zcrypt_rng_dev = {
1183         .name           = "zcrypt",
1184         .data_read      = zcrypt_rng_data_read,
1185         .quality        = 990,
1186 };
1187
1188 int zcrypt_rng_device_add(void)
1189 {
1190         int rc = 0;
1191
1192         mutex_lock(&zcrypt_rng_mutex);
1193         if (zcrypt_rng_device_count == 0) {
1194                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1195                 if (!zcrypt_rng_buffer) {
1196                         rc = -ENOMEM;
1197                         goto out;
1198                 }
1199                 zcrypt_rng_buffer_index = 0;
1200                 if (!zcrypt_hwrng_seed)
1201                         zcrypt_rng_dev.quality = 0;
1202                 rc = hwrng_register(&zcrypt_rng_dev);
1203                 if (rc)
1204                         goto out_free;
1205                 zcrypt_rng_device_count = 1;
1206         } else
1207                 zcrypt_rng_device_count++;
1208         mutex_unlock(&zcrypt_rng_mutex);
1209         return 0;
1210
1211 out_free:
1212         free_page((unsigned long) zcrypt_rng_buffer);
1213 out:
1214         mutex_unlock(&zcrypt_rng_mutex);
1215         return rc;
1216 }
1217
1218 void zcrypt_rng_device_remove(void)
1219 {
1220         mutex_lock(&zcrypt_rng_mutex);
1221         zcrypt_rng_device_count--;
1222         if (zcrypt_rng_device_count == 0) {
1223                 hwrng_unregister(&zcrypt_rng_dev);
1224                 free_page((unsigned long) zcrypt_rng_buffer);
1225         }
1226         mutex_unlock(&zcrypt_rng_mutex);
1227 }
1228
1229 int __init zcrypt_debug_init(void)
1230 {
1231         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1232                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
1233         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1234         debug_set_level(zcrypt_dbf_info, DBF_ERR);
1235
1236         return 0;
1237 }
1238
1239 void zcrypt_debug_exit(void)
1240 {
1241         debug_unregister(zcrypt_dbf_info);
1242 }
1243
1244 /**
1245  * zcrypt_api_init(): Module initialization.
1246  *
1247  * The module initialization code.
1248  */
1249 int __init zcrypt_api_init(void)
1250 {
1251         int rc;
1252
1253         rc = zcrypt_debug_init();
1254         if (rc)
1255                 goto out;
1256
1257         /* Register the request sprayer. */
1258         rc = misc_register(&zcrypt_misc_device);
1259         if (rc < 0)
1260                 goto out;
1261
1262         zcrypt_msgtype6_init();
1263         zcrypt_msgtype50_init();
1264         return 0;
1265
1266 out:
1267         return rc;
1268 }
1269
1270 /**
1271  * zcrypt_api_exit(): Module termination.
1272  *
1273  * The module termination code.
1274  */
1275 void __exit zcrypt_api_exit(void)
1276 {
1277         misc_deregister(&zcrypt_misc_device);
1278         zcrypt_msgtype6_exit();
1279         zcrypt_msgtype50_exit();
1280         zcrypt_debug_exit();
1281 }
1282
1283 module_init(zcrypt_api_init);
1284 module_exit(zcrypt_api_exit);