1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29#include <linux/module.h>
30#include <linux/init.h>
31#include <linux/interrupt.h>
32#include <linux/miscdevice.h>
33#include <linux/fs.h>
34#include <linux/proc_fs.h>
35#include <linux/seq_file.h>
36#include <linux/compat.h>
37#include <linux/slab.h>
38#include <linux/atomic.h>
39#include <linux/uaccess.h>
40#include <linux/hw_random.h>
41#include <linux/debugfs.h>
42#include <asm/debug.h>
43
44#define CREATE_TRACE_POINTS
45#include <asm/trace/zcrypt.h>
46
47#include "zcrypt_api.h"
48#include "zcrypt_debug.h"
49
50#include "zcrypt_msgtype6.h"
51#include "zcrypt_msgtype50.h"
52
53
54
55
56MODULE_AUTHOR("IBM Corporation");
57MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
58 "Copyright IBM Corp. 2001, 2012");
59MODULE_LICENSE("GPL");
60
61
62
63
64EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
65EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
66
67static int zcrypt_hwrng_seed = 1;
68module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, S_IRUSR|S_IRGRP);
69MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
70
71DEFINE_SPINLOCK(zcrypt_list_lock);
72LIST_HEAD(zcrypt_card_list);
73int zcrypt_device_count;
74
75static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
76static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
77
78atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
79EXPORT_SYMBOL(zcrypt_rescan_req);
80
81static LIST_HEAD(zcrypt_ops_list);
82
83
84debug_info_t *zcrypt_dbf_info;
85
86
87
88
89
90
91static inline int zcrypt_process_rescan(void)
92{
93 if (atomic_read(&zcrypt_rescan_req)) {
94 atomic_set(&zcrypt_rescan_req, 0);
95 atomic_inc(&zcrypt_rescan_count);
96 ap_bus_force_rescan();
97 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d",
98 atomic_inc_return(&zcrypt_rescan_count));
99 return 1;
100 }
101 return 0;
102}
103
104void zcrypt_msgtype_register(struct zcrypt_ops *zops)
105{
106 list_add_tail(&zops->list, &zcrypt_ops_list);
107}
108
109void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
110{
111 list_del_init(&zops->list);
112}
113
114struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
115{
116 struct zcrypt_ops *zops;
117
118 list_for_each_entry(zops, &zcrypt_ops_list, list)
119 if ((zops->variant == variant) &&
120 (!strncmp(zops->name, name, sizeof(zops->name))))
121 return zops;
122 return NULL;
123}
124EXPORT_SYMBOL(zcrypt_msgtype);
125
126
127
128
129
130
131static ssize_t zcrypt_read(struct file *filp, char __user *buf,
132 size_t count, loff_t *f_pos)
133{
134 return -EPERM;
135}
136
137
138
139
140
141
142static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
143 size_t count, loff_t *f_pos)
144{
145 return -EPERM;
146}
147
148
149
150
151
152
153static int zcrypt_open(struct inode *inode, struct file *filp)
154{
155 atomic_inc(&zcrypt_open_count);
156 return nonseekable_open(inode, filp);
157}
158
159
160
161
162
163
164static int zcrypt_release(struct inode *inode, struct file *filp)
165{
166 atomic_dec(&zcrypt_open_count);
167 return 0;
168}
169
170static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
171 struct zcrypt_queue *zq,
172 unsigned int weight)
173{
174 if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
175 return NULL;
176 zcrypt_queue_get(zq);
177 get_device(&zq->queue->ap_dev.device);
178 atomic_add(weight, &zc->load);
179 atomic_add(weight, &zq->load);
180 zq->request_count++;
181 return zq;
182}
183
184static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
185 struct zcrypt_queue *zq,
186 unsigned int weight)
187{
188 struct module *mod = zq->queue->ap_dev.drv->driver.owner;
189
190 zq->request_count--;
191 atomic_sub(weight, &zc->load);
192 atomic_sub(weight, &zq->load);
193 put_device(&zq->queue->ap_dev.device);
194 zcrypt_queue_put(zq);
195 module_put(mod);
196}
197
198static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
199 struct zcrypt_card *pref_zc,
200 unsigned weight, unsigned pref_weight)
201{
202 if (!pref_zc)
203 return false;
204 weight += atomic_read(&zc->load);
205 pref_weight += atomic_read(&pref_zc->load);
206 if (weight == pref_weight)
207 return atomic_read(&zc->card->total_request_count) >
208 atomic_read(&pref_zc->card->total_request_count);
209 return weight > pref_weight;
210}
211
212static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
213 struct zcrypt_queue *pref_zq,
214 unsigned weight, unsigned pref_weight)
215{
216 if (!pref_zq)
217 return false;
218 weight += atomic_read(&zq->load);
219 pref_weight += atomic_read(&pref_zq->load);
220 if (weight == pref_weight)
221 return &zq->queue->total_request_count >
222 &pref_zq->queue->total_request_count;
223 return weight > pref_weight;
224}
225
226
227
228
229static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
230{
231 struct zcrypt_card *zc, *pref_zc;
232 struct zcrypt_queue *zq, *pref_zq;
233 unsigned int weight, pref_weight;
234 unsigned int func_code;
235 int qid = 0, rc = -ENODEV;
236
237 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
238
239 if (mex->outputdatalength < mex->inputdatalength) {
240 rc = -EINVAL;
241 goto out;
242 }
243
244
245
246
247
248
249 mex->outputdatalength = mex->inputdatalength;
250
251 rc = get_rsa_modex_fc(mex, &func_code);
252 if (rc)
253 goto out;
254
255 pref_zc = NULL;
256 pref_zq = NULL;
257 spin_lock(&zcrypt_list_lock);
258 for_each_zcrypt_card(zc) {
259
260 if (!zc->online || !(zc->card->functions & 0x18000000))
261 continue;
262
263 if (zc->min_mod_size > mex->inputdatalength ||
264 zc->max_mod_size < mex->inputdatalength)
265 continue;
266
267 weight = zc->speed_rating[func_code];
268 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
269 continue;
270 for_each_zcrypt_queue(zq, zc) {
271
272 if (!zq->online || !zq->ops->rsa_modexpo)
273 continue;
274 if (zcrypt_queue_compare(zq, pref_zq,
275 weight, pref_weight))
276 continue;
277 pref_zc = zc;
278 pref_zq = zq;
279 pref_weight = weight;
280 }
281 }
282 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
283 spin_unlock(&zcrypt_list_lock);
284
285 if (!pref_zq) {
286 rc = -ENODEV;
287 goto out;
288 }
289
290 qid = pref_zq->queue->qid;
291 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
292
293 spin_lock(&zcrypt_list_lock);
294 zcrypt_drop_queue(pref_zc, pref_zq, weight);
295 spin_unlock(&zcrypt_list_lock);
296
297out:
298 trace_s390_zcrypt_rep(mex, func_code, rc,
299 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
300 return rc;
301}
302
303static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
304{
305 struct zcrypt_card *zc, *pref_zc;
306 struct zcrypt_queue *zq, *pref_zq;
307 unsigned int weight, pref_weight;
308 unsigned int func_code;
309 int qid = 0, rc = -ENODEV;
310
311 trace_s390_zcrypt_req(crt, TP_ICARSACRT);
312
313 if (crt->outputdatalength < crt->inputdatalength) {
314 rc = -EINVAL;
315 goto out;
316 }
317
318
319
320
321
322
323 crt->outputdatalength = crt->inputdatalength;
324
325 rc = get_rsa_crt_fc(crt, &func_code);
326 if (rc)
327 goto out;
328
329 pref_zc = NULL;
330 pref_zq = NULL;
331 spin_lock(&zcrypt_list_lock);
332 for_each_zcrypt_card(zc) {
333
334 if (!zc->online || !(zc->card->functions & 0x18000000))
335 continue;
336
337 if (zc->min_mod_size > crt->inputdatalength ||
338 zc->max_mod_size < crt->inputdatalength)
339 continue;
340
341 weight = zc->speed_rating[func_code];
342 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
343 continue;
344 for_each_zcrypt_queue(zq, zc) {
345
346 if (!zq->online || !zq->ops->rsa_modexpo_crt)
347 continue;
348 if (zcrypt_queue_compare(zq, pref_zq,
349 weight, pref_weight))
350 continue;
351 pref_zc = zc;
352 pref_zq = zq;
353 pref_weight = weight;
354 }
355 }
356 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
357 spin_unlock(&zcrypt_list_lock);
358
359 if (!pref_zq) {
360 rc = -ENODEV;
361 goto out;
362 }
363
364 qid = pref_zq->queue->qid;
365 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
366
367 spin_lock(&zcrypt_list_lock);
368 zcrypt_drop_queue(pref_zc, pref_zq, weight);
369 spin_unlock(&zcrypt_list_lock);
370
371out:
372 trace_s390_zcrypt_rep(crt, func_code, rc,
373 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
374 return rc;
375}
376
377long zcrypt_send_cprb(struct ica_xcRB *xcRB)
378{
379 struct zcrypt_card *zc, *pref_zc;
380 struct zcrypt_queue *zq, *pref_zq;
381 struct ap_message ap_msg;
382 unsigned int weight, pref_weight;
383 unsigned int func_code;
384 unsigned short *domain;
385 int qid = 0, rc = -ENODEV;
386
387 trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
388
389 rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
390 if (rc)
391 goto out;
392
393 pref_zc = NULL;
394 pref_zq = NULL;
395 spin_lock(&zcrypt_list_lock);
396 for_each_zcrypt_card(zc) {
397
398 if (!zc->online || !(zc->card->functions & 0x10000000))
399 continue;
400
401 if (xcRB->user_defined != AUTOSELECT &&
402 xcRB->user_defined != zc->card->id)
403 continue;
404
405 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
406 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
407 continue;
408 for_each_zcrypt_queue(zq, zc) {
409
410 if (!zq->online ||
411 !zq->ops->send_cprb ||
412 ((*domain != (unsigned short) AUTOSELECT) &&
413 (*domain != AP_QID_QUEUE(zq->queue->qid))))
414 continue;
415 if (zcrypt_queue_compare(zq, pref_zq,
416 weight, pref_weight))
417 continue;
418 pref_zc = zc;
419 pref_zq = zq;
420 pref_weight = weight;
421 }
422 }
423 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
424 spin_unlock(&zcrypt_list_lock);
425
426 if (!pref_zq) {
427 rc = -ENODEV;
428 goto out;
429 }
430
431
432 qid = pref_zq->queue->qid;
433 if (*domain == (unsigned short) AUTOSELECT)
434 *domain = AP_QID_QUEUE(qid);
435
436 rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
437
438 spin_lock(&zcrypt_list_lock);
439 zcrypt_drop_queue(pref_zc, pref_zq, weight);
440 spin_unlock(&zcrypt_list_lock);
441
442out:
443 trace_s390_zcrypt_rep(xcRB, func_code, rc,
444 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
445 return rc;
446}
447EXPORT_SYMBOL(zcrypt_send_cprb);
448
449static bool is_desired_ep11_card(unsigned int dev_id,
450 unsigned short target_num,
451 struct ep11_target_dev *targets)
452{
453 while (target_num-- > 0) {
454 if (dev_id == targets->ap_id)
455 return true;
456 targets++;
457 }
458 return false;
459}
460
461static bool is_desired_ep11_queue(unsigned int dev_qid,
462 unsigned short target_num,
463 struct ep11_target_dev *targets)
464{
465 while (target_num-- > 0) {
466 if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
467 return true;
468 targets++;
469 }
470 return false;
471}
472
473static long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
474{
475 struct zcrypt_card *zc, *pref_zc;
476 struct zcrypt_queue *zq, *pref_zq;
477 struct ep11_target_dev *targets;
478 unsigned short target_num;
479 unsigned int weight, pref_weight;
480 unsigned int func_code;
481 struct ap_message ap_msg;
482 int qid = 0, rc = -ENODEV;
483
484 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
485
486 target_num = (unsigned short) xcrb->targets_num;
487
488
489 targets = NULL;
490 if (target_num != 0) {
491 struct ep11_target_dev __user *uptr;
492
493 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
494 if (!targets) {
495 rc = -ENOMEM;
496 goto out;
497 }
498
499 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
500 if (copy_from_user(targets, uptr,
501 target_num * sizeof(*targets))) {
502 rc = -EFAULT;
503 goto out;
504 }
505 }
506
507 rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
508 if (rc)
509 goto out_free;
510
511 pref_zc = NULL;
512 pref_zq = NULL;
513 spin_lock(&zcrypt_list_lock);
514 for_each_zcrypt_card(zc) {
515
516 if (!zc->online || !(zc->card->functions & 0x04000000))
517 continue;
518
519 if (targets &&
520 !is_desired_ep11_card(zc->card->id, target_num, targets))
521 continue;
522
523 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
524 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
525 continue;
526 for_each_zcrypt_queue(zq, zc) {
527
528 if (!zq->online ||
529 !zq->ops->send_ep11_cprb ||
530 (targets &&
531 !is_desired_ep11_queue(zq->queue->qid,
532 target_num, targets)))
533 continue;
534 if (zcrypt_queue_compare(zq, pref_zq,
535 weight, pref_weight))
536 continue;
537 pref_zc = zc;
538 pref_zq = zq;
539 pref_weight = weight;
540 }
541 }
542 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
543 spin_unlock(&zcrypt_list_lock);
544
545 if (!pref_zq) {
546 rc = -ENODEV;
547 goto out_free;
548 }
549
550 qid = pref_zq->queue->qid;
551 rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
552
553 spin_lock(&zcrypt_list_lock);
554 zcrypt_drop_queue(pref_zc, pref_zq, weight);
555 spin_unlock(&zcrypt_list_lock);
556
557out_free:
558 kfree(targets);
559out:
560 trace_s390_zcrypt_rep(xcrb, func_code, rc,
561 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
562 return rc;
563}
564
565static long zcrypt_rng(char *buffer)
566{
567 struct zcrypt_card *zc, *pref_zc;
568 struct zcrypt_queue *zq, *pref_zq;
569 unsigned int weight, pref_weight;
570 unsigned int func_code;
571 struct ap_message ap_msg;
572 unsigned int domain;
573 int qid = 0, rc = -ENODEV;
574
575 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
576
577 rc = get_rng_fc(&ap_msg, &func_code, &domain);
578 if (rc)
579 goto out;
580
581 pref_zc = NULL;
582 pref_zq = NULL;
583 spin_lock(&zcrypt_list_lock);
584 for_each_zcrypt_card(zc) {
585
586 if (!zc->online || !(zc->card->functions & 0x10000000))
587 continue;
588
589 weight = zc->speed_rating[func_code];
590 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
591 continue;
592 for_each_zcrypt_queue(zq, zc) {
593
594 if (!zq->online || !zq->ops->rng)
595 continue;
596 if (zcrypt_queue_compare(zq, pref_zq,
597 weight, pref_weight))
598 continue;
599 pref_zc = zc;
600 pref_zq = zq;
601 pref_weight = weight;
602 }
603 }
604 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
605 spin_unlock(&zcrypt_list_lock);
606
607 if (!pref_zq)
608 return -ENODEV;
609
610 qid = pref_zq->queue->qid;
611 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
612
613 spin_lock(&zcrypt_list_lock);
614 zcrypt_drop_queue(pref_zc, pref_zq, weight);
615 spin_unlock(&zcrypt_list_lock);
616
617out:
618 trace_s390_zcrypt_rep(buffer, func_code, rc,
619 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
620 return rc;
621}
622
623void zcrypt_device_status_mask(struct zcrypt_device_matrix *matrix)
624{
625 struct zcrypt_card *zc;
626 struct zcrypt_queue *zq;
627 struct zcrypt_device_status *stat;
628
629 memset(matrix, 0, sizeof(*matrix));
630 spin_lock(&zcrypt_list_lock);
631 for_each_zcrypt_card(zc) {
632 for_each_zcrypt_queue(zq, zc) {
633 stat = matrix->device;
634 stat += AP_QID_CARD(zq->queue->qid) * MAX_ZDEV_DOMAINS;
635 stat += AP_QID_QUEUE(zq->queue->qid);
636 stat->hwtype = zc->card->ap_dev.device_type;
637 stat->functions = zc->card->functions >> 26;
638 stat->qid = zq->queue->qid;
639 stat->online = zq->online ? 0x01 : 0x00;
640 }
641 }
642 spin_unlock(&zcrypt_list_lock);
643}
644EXPORT_SYMBOL(zcrypt_device_status_mask);
645
646static void zcrypt_status_mask(char status[AP_DEVICES])
647{
648 struct zcrypt_card *zc;
649 struct zcrypt_queue *zq;
650
651 memset(status, 0, sizeof(char) * AP_DEVICES);
652 spin_lock(&zcrypt_list_lock);
653 for_each_zcrypt_card(zc) {
654 for_each_zcrypt_queue(zq, zc) {
655 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
656 continue;
657 status[AP_QID_CARD(zq->queue->qid)] =
658 zc->online ? zc->user_space_type : 0x0d;
659 }
660 }
661 spin_unlock(&zcrypt_list_lock);
662}
663
664static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES])
665{
666 struct zcrypt_card *zc;
667 struct zcrypt_queue *zq;
668
669 memset(qdepth, 0, sizeof(char) * AP_DEVICES);
670 spin_lock(&zcrypt_list_lock);
671 local_bh_disable();
672 for_each_zcrypt_card(zc) {
673 for_each_zcrypt_queue(zq, zc) {
674 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
675 continue;
676 spin_lock(&zq->queue->lock);
677 qdepth[AP_QID_CARD(zq->queue->qid)] =
678 zq->queue->pendingq_count +
679 zq->queue->requestq_count;
680 spin_unlock(&zq->queue->lock);
681 }
682 }
683 local_bh_enable();
684 spin_unlock(&zcrypt_list_lock);
685}
686
687static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES])
688{
689 struct zcrypt_card *zc;
690 struct zcrypt_queue *zq;
691
692 memset(reqcnt, 0, sizeof(int) * AP_DEVICES);
693 spin_lock(&zcrypt_list_lock);
694 local_bh_disable();
695 for_each_zcrypt_card(zc) {
696 for_each_zcrypt_queue(zq, zc) {
697 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
698 continue;
699 spin_lock(&zq->queue->lock);
700 reqcnt[AP_QID_CARD(zq->queue->qid)] =
701 zq->queue->total_request_count;
702 spin_unlock(&zq->queue->lock);
703 }
704 }
705 local_bh_enable();
706 spin_unlock(&zcrypt_list_lock);
707}
708
709static int zcrypt_pendingq_count(void)
710{
711 struct zcrypt_card *zc;
712 struct zcrypt_queue *zq;
713 int pendingq_count;
714
715 pendingq_count = 0;
716 spin_lock(&zcrypt_list_lock);
717 local_bh_disable();
718 for_each_zcrypt_card(zc) {
719 for_each_zcrypt_queue(zq, zc) {
720 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
721 continue;
722 spin_lock(&zq->queue->lock);
723 pendingq_count += zq->queue->pendingq_count;
724 spin_unlock(&zq->queue->lock);
725 }
726 }
727 local_bh_enable();
728 spin_unlock(&zcrypt_list_lock);
729 return pendingq_count;
730}
731
732static int zcrypt_requestq_count(void)
733{
734 struct zcrypt_card *zc;
735 struct zcrypt_queue *zq;
736 int requestq_count;
737
738 requestq_count = 0;
739 spin_lock(&zcrypt_list_lock);
740 local_bh_disable();
741 for_each_zcrypt_card(zc) {
742 for_each_zcrypt_queue(zq, zc) {
743 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
744 continue;
745 spin_lock(&zq->queue->lock);
746 requestq_count += zq->queue->requestq_count;
747 spin_unlock(&zq->queue->lock);
748 }
749 }
750 local_bh_enable();
751 spin_unlock(&zcrypt_list_lock);
752 return requestq_count;
753}
754
755static int zcrypt_count_type(int type)
756{
757 struct zcrypt_card *zc;
758 struct zcrypt_queue *zq;
759 int device_count;
760
761 device_count = 0;
762 spin_lock(&zcrypt_list_lock);
763 for_each_zcrypt_card(zc) {
764 if (zc->card->id != type)
765 continue;
766 for_each_zcrypt_queue(zq, zc) {
767 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
768 continue;
769 device_count++;
770 }
771 }
772 spin_unlock(&zcrypt_list_lock);
773 return device_count;
774}
775
776
777
778
779
780
781static long zcrypt_ica_status(struct file *filp, unsigned long arg)
782{
783 struct ica_z90_status *pstat;
784 int ret;
785
786 pstat = kzalloc(sizeof(*pstat), GFP_KERNEL);
787 if (!pstat)
788 return -ENOMEM;
789 pstat->totalcount = zcrypt_device_count;
790 pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA);
791 pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC);
792 pstat->requestqWaitCount = zcrypt_requestq_count();
793 pstat->pendingqWaitCount = zcrypt_pendingq_count();
794 pstat->totalOpenCount = atomic_read(&zcrypt_open_count);
795 pstat->cryptoDomain = ap_domain_index;
796 zcrypt_status_mask(pstat->status);
797 zcrypt_qdepth_mask(pstat->qdepth);
798 ret = 0;
799 if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat)))
800 ret = -EFAULT;
801 kfree(pstat);
802 return ret;
803}
804
805static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
806 unsigned long arg)
807{
808 int rc;
809
810 switch (cmd) {
811 case ICARSAMODEXPO: {
812 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
813 struct ica_rsa_modexpo mex;
814 if (copy_from_user(&mex, umex, sizeof(mex)))
815 return -EFAULT;
816 do {
817 rc = zcrypt_rsa_modexpo(&mex);
818 } while (rc == -EAGAIN);
819
820 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
821 do {
822 rc = zcrypt_rsa_modexpo(&mex);
823 } while (rc == -EAGAIN);
824 if (rc)
825 return rc;
826 return put_user(mex.outputdatalength, &umex->outputdatalength);
827 }
828 case ICARSACRT: {
829 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
830 struct ica_rsa_modexpo_crt crt;
831 if (copy_from_user(&crt, ucrt, sizeof(crt)))
832 return -EFAULT;
833 do {
834 rc = zcrypt_rsa_crt(&crt);
835 } while (rc == -EAGAIN);
836
837 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
838 do {
839 rc = zcrypt_rsa_crt(&crt);
840 } while (rc == -EAGAIN);
841 if (rc)
842 return rc;
843 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
844 }
845 case ZSECSENDCPRB: {
846 struct ica_xcRB __user *uxcRB = (void __user *) arg;
847 struct ica_xcRB xcRB;
848 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
849 return -EFAULT;
850 do {
851 rc = zcrypt_send_cprb(&xcRB);
852 } while (rc == -EAGAIN);
853
854 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
855 do {
856 rc = zcrypt_send_cprb(&xcRB);
857 } while (rc == -EAGAIN);
858 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
859 return -EFAULT;
860 return rc;
861 }
862 case ZSENDEP11CPRB: {
863 struct ep11_urb __user *uxcrb = (void __user *)arg;
864 struct ep11_urb xcrb;
865 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
866 return -EFAULT;
867 do {
868 rc = zcrypt_send_ep11_cprb(&xcrb);
869 } while (rc == -EAGAIN);
870
871 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
872 do {
873 rc = zcrypt_send_ep11_cprb(&xcrb);
874 } while (rc == -EAGAIN);
875 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
876 return -EFAULT;
877 return rc;
878 }
879 case ZDEVICESTATUS: {
880 struct zcrypt_device_matrix *device_status;
881
882 device_status = kzalloc(sizeof(struct zcrypt_device_matrix),
883 GFP_KERNEL);
884 if (!device_status)
885 return -ENOMEM;
886
887 zcrypt_device_status_mask(device_status);
888
889 if (copy_to_user((char __user *) arg, device_status,
890 sizeof(struct zcrypt_device_matrix))) {
891 kfree(device_status);
892 return -EFAULT;
893 }
894
895 kfree(device_status);
896 return 0;
897 }
898 case Z90STAT_STATUS_MASK: {
899 char status[AP_DEVICES];
900 zcrypt_status_mask(status);
901 if (copy_to_user((char __user *) arg, status,
902 sizeof(char) * AP_DEVICES))
903 return -EFAULT;
904 return 0;
905 }
906 case Z90STAT_QDEPTH_MASK: {
907 char qdepth[AP_DEVICES];
908 zcrypt_qdepth_mask(qdepth);
909 if (copy_to_user((char __user *) arg, qdepth,
910 sizeof(char) * AP_DEVICES))
911 return -EFAULT;
912 return 0;
913 }
914 case Z90STAT_PERDEV_REQCNT: {
915 int reqcnt[AP_DEVICES];
916 zcrypt_perdev_reqcnt(reqcnt);
917 if (copy_to_user((int __user *) arg, reqcnt,
918 sizeof(int) * AP_DEVICES))
919 return -EFAULT;
920 return 0;
921 }
922 case Z90STAT_REQUESTQ_COUNT:
923 return put_user(zcrypt_requestq_count(), (int __user *) arg);
924 case Z90STAT_PENDINGQ_COUNT:
925 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
926 case Z90STAT_TOTALOPEN_COUNT:
927 return put_user(atomic_read(&zcrypt_open_count),
928 (int __user *) arg);
929 case Z90STAT_DOMAIN_INDEX:
930 return put_user(ap_domain_index, (int __user *) arg);
931
932
933
934
935
936 case ICAZ90STATUS:
937 return zcrypt_ica_status(filp, arg);
938 case Z90STAT_TOTALCOUNT:
939 return put_user(zcrypt_device_count, (int __user *) arg);
940 case Z90STAT_PCICACOUNT:
941 return put_user(zcrypt_count_type(ZCRYPT_PCICA),
942 (int __user *) arg);
943 case Z90STAT_PCICCCOUNT:
944 return put_user(zcrypt_count_type(ZCRYPT_PCICC),
945 (int __user *) arg);
946 case Z90STAT_PCIXCCMCL2COUNT:
947 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2),
948 (int __user *) arg);
949 case Z90STAT_PCIXCCMCL3COUNT:
950 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
951 (int __user *) arg);
952 case Z90STAT_PCIXCCCOUNT:
953 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) +
954 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
955 (int __user *) arg);
956 case Z90STAT_CEX2CCOUNT:
957 return put_user(zcrypt_count_type(ZCRYPT_CEX2C),
958 (int __user *) arg);
959 case Z90STAT_CEX2ACOUNT:
960 return put_user(zcrypt_count_type(ZCRYPT_CEX2A),
961 (int __user *) arg);
962 default:
963
964 return -ENOIOCTLCMD;
965 }
966}
967
968#ifdef CONFIG_COMPAT
969
970
971
972struct compat_ica_rsa_modexpo {
973 compat_uptr_t inputdata;
974 unsigned int inputdatalength;
975 compat_uptr_t outputdata;
976 unsigned int outputdatalength;
977 compat_uptr_t b_key;
978 compat_uptr_t n_modulus;
979};
980
981static long trans_modexpo32(struct file *filp, unsigned int cmd,
982 unsigned long arg)
983{
984 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
985 struct compat_ica_rsa_modexpo mex32;
986 struct ica_rsa_modexpo mex64;
987 long rc;
988
989 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
990 return -EFAULT;
991 mex64.inputdata = compat_ptr(mex32.inputdata);
992 mex64.inputdatalength = mex32.inputdatalength;
993 mex64.outputdata = compat_ptr(mex32.outputdata);
994 mex64.outputdatalength = mex32.outputdatalength;
995 mex64.b_key = compat_ptr(mex32.b_key);
996 mex64.n_modulus = compat_ptr(mex32.n_modulus);
997 do {
998 rc = zcrypt_rsa_modexpo(&mex64);
999 } while (rc == -EAGAIN);
1000
1001 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1002 do {
1003 rc = zcrypt_rsa_modexpo(&mex64);
1004 } while (rc == -EAGAIN);
1005 if (rc)
1006 return rc;
1007 return put_user(mex64.outputdatalength,
1008 &umex32->outputdatalength);
1009}
1010
1011struct compat_ica_rsa_modexpo_crt {
1012 compat_uptr_t inputdata;
1013 unsigned int inputdatalength;
1014 compat_uptr_t outputdata;
1015 unsigned int outputdatalength;
1016 compat_uptr_t bp_key;
1017 compat_uptr_t bq_key;
1018 compat_uptr_t np_prime;
1019 compat_uptr_t nq_prime;
1020 compat_uptr_t u_mult_inv;
1021};
1022
1023static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
1024 unsigned long arg)
1025{
1026 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1027 struct compat_ica_rsa_modexpo_crt crt32;
1028 struct ica_rsa_modexpo_crt crt64;
1029 long rc;
1030
1031 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1032 return -EFAULT;
1033 crt64.inputdata = compat_ptr(crt32.inputdata);
1034 crt64.inputdatalength = crt32.inputdatalength;
1035 crt64.outputdata= compat_ptr(crt32.outputdata);
1036 crt64.outputdatalength = crt32.outputdatalength;
1037 crt64.bp_key = compat_ptr(crt32.bp_key);
1038 crt64.bq_key = compat_ptr(crt32.bq_key);
1039 crt64.np_prime = compat_ptr(crt32.np_prime);
1040 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1041 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1042 do {
1043 rc = zcrypt_rsa_crt(&crt64);
1044 } while (rc == -EAGAIN);
1045
1046 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1047 do {
1048 rc = zcrypt_rsa_crt(&crt64);
1049 } while (rc == -EAGAIN);
1050 if (rc)
1051 return rc;
1052 return put_user(crt64.outputdatalength,
1053 &ucrt32->outputdatalength);
1054}
1055
1056struct compat_ica_xcRB {
1057 unsigned short agent_ID;
1058 unsigned int user_defined;
1059 unsigned short request_ID;
1060 unsigned int request_control_blk_length;
1061 unsigned char padding1[16 - sizeof (compat_uptr_t)];
1062 compat_uptr_t request_control_blk_addr;
1063 unsigned int request_data_length;
1064 char padding2[16 - sizeof (compat_uptr_t)];
1065 compat_uptr_t request_data_address;
1066 unsigned int reply_control_blk_length;
1067 char padding3[16 - sizeof (compat_uptr_t)];
1068 compat_uptr_t reply_control_blk_addr;
1069 unsigned int reply_data_length;
1070 char padding4[16 - sizeof (compat_uptr_t)];
1071 compat_uptr_t reply_data_addr;
1072 unsigned short priority_window;
1073 unsigned int status;
1074} __attribute__((packed));
1075
1076static long trans_xcRB32(struct file *filp, unsigned int cmd,
1077 unsigned long arg)
1078{
1079 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1080 struct compat_ica_xcRB xcRB32;
1081 struct ica_xcRB xcRB64;
1082 long rc;
1083
1084 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1085 return -EFAULT;
1086 xcRB64.agent_ID = xcRB32.agent_ID;
1087 xcRB64.user_defined = xcRB32.user_defined;
1088 xcRB64.request_ID = xcRB32.request_ID;
1089 xcRB64.request_control_blk_length =
1090 xcRB32.request_control_blk_length;
1091 xcRB64.request_control_blk_addr =
1092 compat_ptr(xcRB32.request_control_blk_addr);
1093 xcRB64.request_data_length =
1094 xcRB32.request_data_length;
1095 xcRB64.request_data_address =
1096 compat_ptr(xcRB32.request_data_address);
1097 xcRB64.reply_control_blk_length =
1098 xcRB32.reply_control_blk_length;
1099 xcRB64.reply_control_blk_addr =
1100 compat_ptr(xcRB32.reply_control_blk_addr);
1101 xcRB64.reply_data_length = xcRB32.reply_data_length;
1102 xcRB64.reply_data_addr =
1103 compat_ptr(xcRB32.reply_data_addr);
1104 xcRB64.priority_window = xcRB32.priority_window;
1105 xcRB64.status = xcRB32.status;
1106 do {
1107 rc = zcrypt_send_cprb(&xcRB64);
1108 } while (rc == -EAGAIN);
1109
1110 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1111 do {
1112 rc = zcrypt_send_cprb(&xcRB64);
1113 } while (rc == -EAGAIN);
1114 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1115 xcRB32.reply_data_length = xcRB64.reply_data_length;
1116 xcRB32.status = xcRB64.status;
1117 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1118 return -EFAULT;
1119 return rc;
1120}
1121
1122static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1123 unsigned long arg)
1124{
1125 if (cmd == ICARSAMODEXPO)
1126 return trans_modexpo32(filp, cmd, arg);
1127 if (cmd == ICARSACRT)
1128 return trans_modexpo_crt32(filp, cmd, arg);
1129 if (cmd == ZSECSENDCPRB)
1130 return trans_xcRB32(filp, cmd, arg);
1131 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1132}
1133#endif
1134
1135
1136
1137
1138static const struct file_operations zcrypt_fops = {
1139 .owner = THIS_MODULE,
1140 .read = zcrypt_read,
1141 .write = zcrypt_write,
1142 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1143#ifdef CONFIG_COMPAT
1144 .compat_ioctl = zcrypt_compat_ioctl,
1145#endif
1146 .open = zcrypt_open,
1147 .release = zcrypt_release,
1148 .llseek = no_llseek,
1149};
1150
1151
1152
1153
1154static struct miscdevice zcrypt_misc_device = {
1155 .minor = MISC_DYNAMIC_MINOR,
1156 .name = "z90crypt",
1157 .fops = &zcrypt_fops,
1158};
1159
1160
1161
1162
1163static struct proc_dir_entry *zcrypt_entry;
1164
1165static void sprintcl(struct seq_file *m, unsigned char *addr, unsigned int len)
1166{
1167 int i;
1168
1169 for (i = 0; i < len; i++)
1170 seq_printf(m, "%01x", (unsigned int) addr[i]);
1171 seq_putc(m, ' ');
1172}
1173
1174static void sprintrw(struct seq_file *m, unsigned char *addr, unsigned int len)
1175{
1176 int inl, c, cx;
1177
1178 seq_printf(m, " ");
1179 inl = 0;
1180 for (c = 0; c < (len / 16); c++) {
1181 sprintcl(m, addr+inl, 16);
1182 inl += 16;
1183 }
1184 cx = len%16;
1185 if (cx) {
1186 sprintcl(m, addr+inl, cx);
1187 inl += cx;
1188 }
1189 seq_putc(m, '\n');
1190}
1191
1192static void sprinthx(unsigned char *title, struct seq_file *m,
1193 unsigned char *addr, unsigned int len)
1194{
1195 int inl, r, rx;
1196
1197 seq_printf(m, "\n%s\n", title);
1198 inl = 0;
1199 for (r = 0; r < (len / 64); r++) {
1200 sprintrw(m, addr+inl, 64);
1201 inl += 64;
1202 }
1203 rx = len % 64;
1204 if (rx) {
1205 sprintrw(m, addr+inl, rx);
1206 inl += rx;
1207 }
1208 seq_putc(m, '\n');
1209}
1210
1211static void sprinthx4(unsigned char *title, struct seq_file *m,
1212 unsigned int *array, unsigned int len)
1213{
1214 seq_printf(m, "\n%s\n", title);
1215 seq_hex_dump(m, " ", DUMP_PREFIX_NONE, 32, 4, array, len, false);
1216 seq_putc(m, '\n');
1217}
1218
1219static int zcrypt_proc_show(struct seq_file *m, void *v)
1220{
1221 char workarea[sizeof(int) * AP_DEVICES];
1222
1223 seq_printf(m, "\nzcrypt version: %d.%d.%d\n",
1224 ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT);
1225 seq_printf(m, "Cryptographic domain: %d\n", ap_domain_index);
1226 seq_printf(m, "Total device count: %d\n", zcrypt_device_count);
1227 seq_printf(m, "PCICA count: %d\n", zcrypt_count_type(ZCRYPT_PCICA));
1228 seq_printf(m, "PCICC count: %d\n", zcrypt_count_type(ZCRYPT_PCICC));
1229 seq_printf(m, "PCIXCC MCL2 count: %d\n",
1230 zcrypt_count_type(ZCRYPT_PCIXCC_MCL2));
1231 seq_printf(m, "PCIXCC MCL3 count: %d\n",
1232 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3));
1233 seq_printf(m, "CEX2C count: %d\n", zcrypt_count_type(ZCRYPT_CEX2C));
1234 seq_printf(m, "CEX2A count: %d\n", zcrypt_count_type(ZCRYPT_CEX2A));
1235 seq_printf(m, "CEX3C count: %d\n", zcrypt_count_type(ZCRYPT_CEX3C));
1236 seq_printf(m, "CEX3A count: %d\n", zcrypt_count_type(ZCRYPT_CEX3A));
1237 seq_printf(m, "requestq count: %d\n", zcrypt_requestq_count());
1238 seq_printf(m, "pendingq count: %d\n", zcrypt_pendingq_count());
1239 seq_printf(m, "Total open handles: %d\n\n",
1240 atomic_read(&zcrypt_open_count));
1241 zcrypt_status_mask(workarea);
1242 sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) "
1243 "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A",
1244 m, workarea, AP_DEVICES);
1245 zcrypt_qdepth_mask(workarea);
1246 sprinthx("Waiting work element counts", m, workarea, AP_DEVICES);
1247 zcrypt_perdev_reqcnt((int *) workarea);
1248 sprinthx4("Per-device successfully completed request counts",
1249 m, (unsigned int *) workarea, AP_DEVICES);
1250 return 0;
1251}
1252
1253static int zcrypt_proc_open(struct inode *inode, struct file *file)
1254{
1255 return single_open(file, zcrypt_proc_show, NULL);
1256}
1257
1258static void zcrypt_disable_card(int index)
1259{
1260 struct zcrypt_card *zc;
1261 struct zcrypt_queue *zq;
1262
1263 spin_lock(&zcrypt_list_lock);
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 zq->online = 0;
1269 ap_flush_queue(zq->queue);
1270 }
1271 }
1272 spin_unlock(&zcrypt_list_lock);
1273}
1274
1275static void zcrypt_enable_card(int index)
1276{
1277 struct zcrypt_card *zc;
1278 struct zcrypt_queue *zq;
1279
1280 spin_lock(&zcrypt_list_lock);
1281 for_each_zcrypt_card(zc) {
1282 for_each_zcrypt_queue(zq, zc) {
1283 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1284 continue;
1285 zq->online = 1;
1286 ap_flush_queue(zq->queue);
1287 }
1288 }
1289 spin_unlock(&zcrypt_list_lock);
1290}
1291
1292static ssize_t zcrypt_proc_write(struct file *file, const char __user *buffer,
1293 size_t count, loff_t *pos)
1294{
1295 unsigned char *lbuf, *ptr;
1296 size_t local_count;
1297 int j;
1298
1299 if (count <= 0)
1300 return 0;
1301
1302#define LBUFSIZE 1200UL
1303 lbuf = kmalloc(LBUFSIZE, GFP_KERNEL);
1304 if (!lbuf)
1305 return 0;
1306
1307 local_count = min(LBUFSIZE - 1, count);
1308 if (copy_from_user(lbuf, buffer, local_count) != 0) {
1309 kfree(lbuf);
1310 return -EFAULT;
1311 }
1312 lbuf[local_count] = '\0';
1313
1314 ptr = strstr(lbuf, "Online devices");
1315 if (!ptr)
1316 goto out;
1317 ptr = strstr(ptr, "\n");
1318 if (!ptr)
1319 goto out;
1320 ptr++;
1321
1322 if (strstr(ptr, "Waiting work element counts") == NULL)
1323 goto out;
1324
1325 for (j = 0; j < 64 && *ptr; ptr++) {
1326
1327
1328
1329
1330
1331
1332 if (*ptr >= '0' && *ptr <= '8')
1333 j++;
1334 else if (*ptr == 'd' || *ptr == 'D')
1335 zcrypt_disable_card(j++);
1336 else if (*ptr == 'e' || *ptr == 'E')
1337 zcrypt_enable_card(j++);
1338 else if (*ptr != ' ' && *ptr != '\t')
1339 break;
1340 }
1341out:
1342 kfree(lbuf);
1343 return count;
1344}
1345
1346static const struct file_operations zcrypt_proc_fops = {
1347 .owner = THIS_MODULE,
1348 .open = zcrypt_proc_open,
1349 .read = seq_read,
1350 .llseek = seq_lseek,
1351 .release = single_release,
1352 .write = zcrypt_proc_write,
1353};
1354
1355static int zcrypt_rng_device_count;
1356static u32 *zcrypt_rng_buffer;
1357static int zcrypt_rng_buffer_index;
1358static DEFINE_MUTEX(zcrypt_rng_mutex);
1359
1360static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1361{
1362 int rc;
1363
1364
1365
1366
1367
1368 if (zcrypt_rng_buffer_index == 0) {
1369 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1370
1371 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1372 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1373 if (rc < 0)
1374 return -EIO;
1375 zcrypt_rng_buffer_index = rc / sizeof *data;
1376 }
1377 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1378 return sizeof *data;
1379}
1380
1381static struct hwrng zcrypt_rng_dev = {
1382 .name = "zcrypt",
1383 .data_read = zcrypt_rng_data_read,
1384 .quality = 990,
1385};
1386
1387int zcrypt_rng_device_add(void)
1388{
1389 int rc = 0;
1390
1391 mutex_lock(&zcrypt_rng_mutex);
1392 if (zcrypt_rng_device_count == 0) {
1393 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1394 if (!zcrypt_rng_buffer) {
1395 rc = -ENOMEM;
1396 goto out;
1397 }
1398 zcrypt_rng_buffer_index = 0;
1399 if (!zcrypt_hwrng_seed)
1400 zcrypt_rng_dev.quality = 0;
1401 rc = hwrng_register(&zcrypt_rng_dev);
1402 if (rc)
1403 goto out_free;
1404 zcrypt_rng_device_count = 1;
1405 } else
1406 zcrypt_rng_device_count++;
1407 mutex_unlock(&zcrypt_rng_mutex);
1408 return 0;
1409
1410out_free:
1411 free_page((unsigned long) zcrypt_rng_buffer);
1412out:
1413 mutex_unlock(&zcrypt_rng_mutex);
1414 return rc;
1415}
1416
1417void zcrypt_rng_device_remove(void)
1418{
1419 mutex_lock(&zcrypt_rng_mutex);
1420 zcrypt_rng_device_count--;
1421 if (zcrypt_rng_device_count == 0) {
1422 hwrng_unregister(&zcrypt_rng_dev);
1423 free_page((unsigned long) zcrypt_rng_buffer);
1424 }
1425 mutex_unlock(&zcrypt_rng_mutex);
1426}
1427
1428int __init zcrypt_debug_init(void)
1429{
1430 zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1431 DBF_MAX_SPRINTF_ARGS * sizeof(long));
1432 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1433 debug_set_level(zcrypt_dbf_info, DBF_ERR);
1434
1435 return 0;
1436}
1437
1438void zcrypt_debug_exit(void)
1439{
1440 debug_unregister(zcrypt_dbf_info);
1441}
1442
1443
1444
1445
1446
1447
1448int __init zcrypt_api_init(void)
1449{
1450 int rc;
1451
1452 rc = zcrypt_debug_init();
1453 if (rc)
1454 goto out;
1455
1456 atomic_set(&zcrypt_rescan_req, 0);
1457
1458
1459 rc = misc_register(&zcrypt_misc_device);
1460 if (rc < 0)
1461 goto out;
1462
1463
1464 zcrypt_entry = proc_create("driver/z90crypt", 0644, NULL,
1465 &zcrypt_proc_fops);
1466 if (!zcrypt_entry) {
1467 rc = -ENOMEM;
1468 goto out_misc;
1469 }
1470
1471 zcrypt_msgtype6_init();
1472 zcrypt_msgtype50_init();
1473 return 0;
1474
1475out_misc:
1476 misc_deregister(&zcrypt_misc_device);
1477out:
1478 return rc;
1479}
1480
1481
1482
1483
1484
1485
1486void __exit zcrypt_api_exit(void)
1487{
1488 remove_proc_entry("driver/z90crypt", NULL);
1489 misc_deregister(&zcrypt_misc_device);
1490 zcrypt_msgtype6_exit();
1491 zcrypt_msgtype50_exit();
1492 zcrypt_debug_exit();
1493}
1494
1495module_init(zcrypt_api_init);
1496module_exit(zcrypt_api_exit);
1497
