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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\n",
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 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
826 return rc;
827 }
828 return put_user(mex.outputdatalength, &umex->outputdatalength);
829 }
830 case ICARSACRT: {
831 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
832 struct ica_rsa_modexpo_crt crt;
833 if (copy_from_user(&crt, ucrt, sizeof(crt)))
834 return -EFAULT;
835 do {
836 rc = zcrypt_rsa_crt(&crt);
837 } while (rc == -EAGAIN);
838
839 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
840 do {
841 rc = zcrypt_rsa_crt(&crt);
842 } while (rc == -EAGAIN);
843 if (rc) {
844 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
845 return rc;
846 }
847 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
848 }
849 case ZSECSENDCPRB: {
850 struct ica_xcRB __user *uxcRB = (void __user *) arg;
851 struct ica_xcRB xcRB;
852 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
853 return -EFAULT;
854 do {
855 rc = zcrypt_send_cprb(&xcRB);
856 } while (rc == -EAGAIN);
857
858 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
859 do {
860 rc = zcrypt_send_cprb(&xcRB);
861 } while (rc == -EAGAIN);
862 if (rc)
863 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d\n", rc);
864 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
865 return -EFAULT;
866 return rc;
867 }
868 case ZSENDEP11CPRB: {
869 struct ep11_urb __user *uxcrb = (void __user *)arg;
870 struct ep11_urb xcrb;
871 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
872 return -EFAULT;
873 do {
874 rc = zcrypt_send_ep11_cprb(&xcrb);
875 } while (rc == -EAGAIN);
876
877 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
878 do {
879 rc = zcrypt_send_ep11_cprb(&xcrb);
880 } while (rc == -EAGAIN);
881 if (rc)
882 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
883 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
884 return -EFAULT;
885 return rc;
886 }
887 case ZDEVICESTATUS: {
888 struct zcrypt_device_matrix *device_status;
889
890 device_status = kzalloc(sizeof(struct zcrypt_device_matrix),
891 GFP_KERNEL);
892 if (!device_status)
893 return -ENOMEM;
894
895 zcrypt_device_status_mask(device_status);
896
897 if (copy_to_user((char __user *) arg, device_status,
898 sizeof(struct zcrypt_device_matrix))) {
899 kfree(device_status);
900 return -EFAULT;
901 }
902
903 kfree(device_status);
904 return 0;
905 }
906 case Z90STAT_STATUS_MASK: {
907 char status[AP_DEVICES];
908 zcrypt_status_mask(status);
909 if (copy_to_user((char __user *) arg, status,
910 sizeof(char) * AP_DEVICES))
911 return -EFAULT;
912 return 0;
913 }
914 case Z90STAT_QDEPTH_MASK: {
915 char qdepth[AP_DEVICES];
916 zcrypt_qdepth_mask(qdepth);
917 if (copy_to_user((char __user *) arg, qdepth,
918 sizeof(char) * AP_DEVICES))
919 return -EFAULT;
920 return 0;
921 }
922 case Z90STAT_PERDEV_REQCNT: {
923 int reqcnt[AP_DEVICES];
924 zcrypt_perdev_reqcnt(reqcnt);
925 if (copy_to_user((int __user *) arg, reqcnt,
926 sizeof(int) * AP_DEVICES))
927 return -EFAULT;
928 return 0;
929 }
930 case Z90STAT_REQUESTQ_COUNT:
931 return put_user(zcrypt_requestq_count(), (int __user *) arg);
932 case Z90STAT_PENDINGQ_COUNT:
933 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
934 case Z90STAT_TOTALOPEN_COUNT:
935 return put_user(atomic_read(&zcrypt_open_count),
936 (int __user *) arg);
937 case Z90STAT_DOMAIN_INDEX:
938 return put_user(ap_domain_index, (int __user *) arg);
939
940
941
942
943
944 case ICAZ90STATUS:
945 return zcrypt_ica_status(filp, arg);
946 case Z90STAT_TOTALCOUNT:
947 return put_user(zcrypt_device_count, (int __user *) arg);
948 case Z90STAT_PCICACOUNT:
949 return put_user(zcrypt_count_type(ZCRYPT_PCICA),
950 (int __user *) arg);
951 case Z90STAT_PCICCCOUNT:
952 return put_user(zcrypt_count_type(ZCRYPT_PCICC),
953 (int __user *) arg);
954 case Z90STAT_PCIXCCMCL2COUNT:
955 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2),
956 (int __user *) arg);
957 case Z90STAT_PCIXCCMCL3COUNT:
958 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
959 (int __user *) arg);
960 case Z90STAT_PCIXCCCOUNT:
961 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) +
962 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
963 (int __user *) arg);
964 case Z90STAT_CEX2CCOUNT:
965 return put_user(zcrypt_count_type(ZCRYPT_CEX2C),
966 (int __user *) arg);
967 case Z90STAT_CEX2ACOUNT:
968 return put_user(zcrypt_count_type(ZCRYPT_CEX2A),
969 (int __user *) arg);
970 default:
971
972 return -ENOIOCTLCMD;
973 }
974}
975
976#ifdef CONFIG_COMPAT
977
978
979
980struct compat_ica_rsa_modexpo {
981 compat_uptr_t inputdata;
982 unsigned int inputdatalength;
983 compat_uptr_t outputdata;
984 unsigned int outputdatalength;
985 compat_uptr_t b_key;
986 compat_uptr_t n_modulus;
987};
988
989static long trans_modexpo32(struct file *filp, unsigned int cmd,
990 unsigned long arg)
991{
992 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
993 struct compat_ica_rsa_modexpo mex32;
994 struct ica_rsa_modexpo mex64;
995 long rc;
996
997 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
998 return -EFAULT;
999 mex64.inputdata = compat_ptr(mex32.inputdata);
1000 mex64.inputdatalength = mex32.inputdatalength;
1001 mex64.outputdata = compat_ptr(mex32.outputdata);
1002 mex64.outputdatalength = mex32.outputdatalength;
1003 mex64.b_key = compat_ptr(mex32.b_key);
1004 mex64.n_modulus = compat_ptr(mex32.n_modulus);
1005 do {
1006 rc = zcrypt_rsa_modexpo(&mex64);
1007 } while (rc == -EAGAIN);
1008
1009 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1010 do {
1011 rc = zcrypt_rsa_modexpo(&mex64);
1012 } while (rc == -EAGAIN);
1013 if (rc)
1014 return rc;
1015 return put_user(mex64.outputdatalength,
1016 &umex32->outputdatalength);
1017}
1018
1019struct compat_ica_rsa_modexpo_crt {
1020 compat_uptr_t inputdata;
1021 unsigned int inputdatalength;
1022 compat_uptr_t outputdata;
1023 unsigned int outputdatalength;
1024 compat_uptr_t bp_key;
1025 compat_uptr_t bq_key;
1026 compat_uptr_t np_prime;
1027 compat_uptr_t nq_prime;
1028 compat_uptr_t u_mult_inv;
1029};
1030
1031static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
1032 unsigned long arg)
1033{
1034 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1035 struct compat_ica_rsa_modexpo_crt crt32;
1036 struct ica_rsa_modexpo_crt crt64;
1037 long rc;
1038
1039 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1040 return -EFAULT;
1041 crt64.inputdata = compat_ptr(crt32.inputdata);
1042 crt64.inputdatalength = crt32.inputdatalength;
1043 crt64.outputdata= compat_ptr(crt32.outputdata);
1044 crt64.outputdatalength = crt32.outputdatalength;
1045 crt64.bp_key = compat_ptr(crt32.bp_key);
1046 crt64.bq_key = compat_ptr(crt32.bq_key);
1047 crt64.np_prime = compat_ptr(crt32.np_prime);
1048 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1049 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1050 do {
1051 rc = zcrypt_rsa_crt(&crt64);
1052 } while (rc == -EAGAIN);
1053
1054 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1055 do {
1056 rc = zcrypt_rsa_crt(&crt64);
1057 } while (rc == -EAGAIN);
1058 if (rc)
1059 return rc;
1060 return put_user(crt64.outputdatalength,
1061 &ucrt32->outputdatalength);
1062}
1063
1064struct compat_ica_xcRB {
1065 unsigned short agent_ID;
1066 unsigned int user_defined;
1067 unsigned short request_ID;
1068 unsigned int request_control_blk_length;
1069 unsigned char padding1[16 - sizeof (compat_uptr_t)];
1070 compat_uptr_t request_control_blk_addr;
1071 unsigned int request_data_length;
1072 char padding2[16 - sizeof (compat_uptr_t)];
1073 compat_uptr_t request_data_address;
1074 unsigned int reply_control_blk_length;
1075 char padding3[16 - sizeof (compat_uptr_t)];
1076 compat_uptr_t reply_control_blk_addr;
1077 unsigned int reply_data_length;
1078 char padding4[16 - sizeof (compat_uptr_t)];
1079 compat_uptr_t reply_data_addr;
1080 unsigned short priority_window;
1081 unsigned int status;
1082} __attribute__((packed));
1083
1084static long trans_xcRB32(struct file *filp, unsigned int cmd,
1085 unsigned long arg)
1086{
1087 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1088 struct compat_ica_xcRB xcRB32;
1089 struct ica_xcRB xcRB64;
1090 long rc;
1091
1092 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1093 return -EFAULT;
1094 xcRB64.agent_ID = xcRB32.agent_ID;
1095 xcRB64.user_defined = xcRB32.user_defined;
1096 xcRB64.request_ID = xcRB32.request_ID;
1097 xcRB64.request_control_blk_length =
1098 xcRB32.request_control_blk_length;
1099 xcRB64.request_control_blk_addr =
1100 compat_ptr(xcRB32.request_control_blk_addr);
1101 xcRB64.request_data_length =
1102 xcRB32.request_data_length;
1103 xcRB64.request_data_address =
1104 compat_ptr(xcRB32.request_data_address);
1105 xcRB64.reply_control_blk_length =
1106 xcRB32.reply_control_blk_length;
1107 xcRB64.reply_control_blk_addr =
1108 compat_ptr(xcRB32.reply_control_blk_addr);
1109 xcRB64.reply_data_length = xcRB32.reply_data_length;
1110 xcRB64.reply_data_addr =
1111 compat_ptr(xcRB32.reply_data_addr);
1112 xcRB64.priority_window = xcRB32.priority_window;
1113 xcRB64.status = xcRB32.status;
1114 do {
1115 rc = zcrypt_send_cprb(&xcRB64);
1116 } while (rc == -EAGAIN);
1117
1118 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1119 do {
1120 rc = zcrypt_send_cprb(&xcRB64);
1121 } while (rc == -EAGAIN);
1122 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1123 xcRB32.reply_data_length = xcRB64.reply_data_length;
1124 xcRB32.status = xcRB64.status;
1125 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1126 return -EFAULT;
1127 return rc;
1128}
1129
1130static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1131 unsigned long arg)
1132{
1133 if (cmd == ICARSAMODEXPO)
1134 return trans_modexpo32(filp, cmd, arg);
1135 if (cmd == ICARSACRT)
1136 return trans_modexpo_crt32(filp, cmd, arg);
1137 if (cmd == ZSECSENDCPRB)
1138 return trans_xcRB32(filp, cmd, arg);
1139 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1140}
1141#endif
1142
1143
1144
1145
1146static const struct file_operations zcrypt_fops = {
1147 .owner = THIS_MODULE,
1148 .read = zcrypt_read,
1149 .write = zcrypt_write,
1150 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1151#ifdef CONFIG_COMPAT
1152 .compat_ioctl = zcrypt_compat_ioctl,
1153#endif
1154 .open = zcrypt_open,
1155 .release = zcrypt_release,
1156 .llseek = no_llseek,
1157};
1158
1159
1160
1161
1162static struct miscdevice zcrypt_misc_device = {
1163 .minor = MISC_DYNAMIC_MINOR,
1164 .name = "z90crypt",
1165 .fops = &zcrypt_fops,
1166};
1167
1168
1169
1170
1171static struct proc_dir_entry *zcrypt_entry;
1172
1173static void sprintcl(struct seq_file *m, unsigned char *addr, unsigned int len)
1174{
1175 int i;
1176
1177 for (i = 0; i < len; i++)
1178 seq_printf(m, "%01x", (unsigned int) addr[i]);
1179 seq_putc(m, ' ');
1180}
1181
1182static void sprintrw(struct seq_file *m, unsigned char *addr, unsigned int len)
1183{
1184 int inl, c, cx;
1185
1186 seq_printf(m, " ");
1187 inl = 0;
1188 for (c = 0; c < (len / 16); c++) {
1189 sprintcl(m, addr+inl, 16);
1190 inl += 16;
1191 }
1192 cx = len%16;
1193 if (cx) {
1194 sprintcl(m, addr+inl, cx);
1195 inl += cx;
1196 }
1197 seq_putc(m, '\n');
1198}
1199
1200static void sprinthx(unsigned char *title, struct seq_file *m,
1201 unsigned char *addr, unsigned int len)
1202{
1203 int inl, r, rx;
1204
1205 seq_printf(m, "\n%s\n", title);
1206 inl = 0;
1207 for (r = 0; r < (len / 64); r++) {
1208 sprintrw(m, addr+inl, 64);
1209 inl += 64;
1210 }
1211 rx = len % 64;
1212 if (rx) {
1213 sprintrw(m, addr+inl, rx);
1214 inl += rx;
1215 }
1216 seq_putc(m, '\n');
1217}
1218
1219static void sprinthx4(unsigned char *title, struct seq_file *m,
1220 unsigned int *array, unsigned int len)
1221{
1222 seq_printf(m, "\n%s\n", title);
1223 seq_hex_dump(m, " ", DUMP_PREFIX_NONE, 32, 4, array, len, false);
1224 seq_putc(m, '\n');
1225}
1226
1227static int zcrypt_proc_show(struct seq_file *m, void *v)
1228{
1229 char workarea[sizeof(int) * AP_DEVICES];
1230
1231 seq_printf(m, "\nzcrypt version: %d.%d.%d\n",
1232 ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT);
1233 seq_printf(m, "Cryptographic domain: %d\n", ap_domain_index);
1234 seq_printf(m, "Total device count: %d\n", zcrypt_device_count);
1235 seq_printf(m, "PCICA count: %d\n", zcrypt_count_type(ZCRYPT_PCICA));
1236 seq_printf(m, "PCICC count: %d\n", zcrypt_count_type(ZCRYPT_PCICC));
1237 seq_printf(m, "PCIXCC MCL2 count: %d\n",
1238 zcrypt_count_type(ZCRYPT_PCIXCC_MCL2));
1239 seq_printf(m, "PCIXCC MCL3 count: %d\n",
1240 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3));
1241 seq_printf(m, "CEX2C count: %d\n", zcrypt_count_type(ZCRYPT_CEX2C));
1242 seq_printf(m, "CEX2A count: %d\n", zcrypt_count_type(ZCRYPT_CEX2A));
1243 seq_printf(m, "CEX3C count: %d\n", zcrypt_count_type(ZCRYPT_CEX3C));
1244 seq_printf(m, "CEX3A count: %d\n", zcrypt_count_type(ZCRYPT_CEX3A));
1245 seq_printf(m, "requestq count: %d\n", zcrypt_requestq_count());
1246 seq_printf(m, "pendingq count: %d\n", zcrypt_pendingq_count());
1247 seq_printf(m, "Total open handles: %d\n\n",
1248 atomic_read(&zcrypt_open_count));
1249 zcrypt_status_mask(workarea);
1250 sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) "
1251 "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A",
1252 m, workarea, AP_DEVICES);
1253 zcrypt_qdepth_mask(workarea);
1254 sprinthx("Waiting work element counts", m, workarea, AP_DEVICES);
1255 zcrypt_perdev_reqcnt((int *) workarea);
1256 sprinthx4("Per-device successfully completed request counts",
1257 m, (unsigned int *) workarea, AP_DEVICES);
1258 return 0;
1259}
1260
1261static int zcrypt_proc_open(struct inode *inode, struct file *file)
1262{
1263 return single_open(file, zcrypt_proc_show, NULL);
1264}
1265
1266static void zcrypt_disable_card(int index)
1267{
1268 struct zcrypt_card *zc;
1269 struct zcrypt_queue *zq;
1270
1271 spin_lock(&zcrypt_list_lock);
1272 for_each_zcrypt_card(zc) {
1273 for_each_zcrypt_queue(zq, zc) {
1274 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1275 continue;
1276 zq->online = 0;
1277 ap_flush_queue(zq->queue);
1278 }
1279 }
1280 spin_unlock(&zcrypt_list_lock);
1281}
1282
1283static void zcrypt_enable_card(int index)
1284{
1285 struct zcrypt_card *zc;
1286 struct zcrypt_queue *zq;
1287
1288 spin_lock(&zcrypt_list_lock);
1289 for_each_zcrypt_card(zc) {
1290 for_each_zcrypt_queue(zq, zc) {
1291 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1292 continue;
1293 zq->online = 1;
1294 ap_flush_queue(zq->queue);
1295 }
1296 }
1297 spin_unlock(&zcrypt_list_lock);
1298}
1299
1300static ssize_t zcrypt_proc_write(struct file *file, const char __user *buffer,
1301 size_t count, loff_t *pos)
1302{
1303 unsigned char *lbuf, *ptr;
1304 size_t local_count;
1305 int j;
1306
1307 if (count <= 0)
1308 return 0;
1309
1310#define LBUFSIZE 1200UL
1311 lbuf = kmalloc(LBUFSIZE, GFP_KERNEL);
1312 if (!lbuf)
1313 return 0;
1314
1315 local_count = min(LBUFSIZE - 1, count);
1316 if (copy_from_user(lbuf, buffer, local_count) != 0) {
1317 kfree(lbuf);
1318 return -EFAULT;
1319 }
1320 lbuf[local_count] = '\0';
1321
1322 ptr = strstr(lbuf, "Online devices");
1323 if (!ptr)
1324 goto out;
1325 ptr = strstr(ptr, "\n");
1326 if (!ptr)
1327 goto out;
1328 ptr++;
1329
1330 if (strstr(ptr, "Waiting work element counts") == NULL)
1331 goto out;
1332
1333 for (j = 0; j < 64 && *ptr; ptr++) {
1334
1335
1336
1337
1338
1339
1340 if (*ptr >= '0' && *ptr <= '8')
1341 j++;
1342 else if (*ptr == 'd' || *ptr == 'D')
1343 zcrypt_disable_card(j++);
1344 else if (*ptr == 'e' || *ptr == 'E')
1345 zcrypt_enable_card(j++);
1346 else if (*ptr != ' ' && *ptr != '\t')
1347 break;
1348 }
1349out:
1350 kfree(lbuf);
1351 return count;
1352}
1353
1354static const struct file_operations zcrypt_proc_fops = {
1355 .owner = THIS_MODULE,
1356 .open = zcrypt_proc_open,
1357 .read = seq_read,
1358 .llseek = seq_lseek,
1359 .release = single_release,
1360 .write = zcrypt_proc_write,
1361};
1362
1363static int zcrypt_rng_device_count;
1364static u32 *zcrypt_rng_buffer;
1365static int zcrypt_rng_buffer_index;
1366static DEFINE_MUTEX(zcrypt_rng_mutex);
1367
1368static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1369{
1370 int rc;
1371
1372
1373
1374
1375
1376 if (zcrypt_rng_buffer_index == 0) {
1377 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1378
1379 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1380 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1381 if (rc < 0)
1382 return -EIO;
1383 zcrypt_rng_buffer_index = rc / sizeof *data;
1384 }
1385 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1386 return sizeof *data;
1387}
1388
1389static struct hwrng zcrypt_rng_dev = {
1390 .name = "zcrypt",
1391 .data_read = zcrypt_rng_data_read,
1392 .quality = 990,
1393};
1394
1395int zcrypt_rng_device_add(void)
1396{
1397 int rc = 0;
1398
1399 mutex_lock(&zcrypt_rng_mutex);
1400 if (zcrypt_rng_device_count == 0) {
1401 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1402 if (!zcrypt_rng_buffer) {
1403 rc = -ENOMEM;
1404 goto out;
1405 }
1406 zcrypt_rng_buffer_index = 0;
1407 if (!zcrypt_hwrng_seed)
1408 zcrypt_rng_dev.quality = 0;
1409 rc = hwrng_register(&zcrypt_rng_dev);
1410 if (rc)
1411 goto out_free;
1412 zcrypt_rng_device_count = 1;
1413 } else
1414 zcrypt_rng_device_count++;
1415 mutex_unlock(&zcrypt_rng_mutex);
1416 return 0;
1417
1418out_free:
1419 free_page((unsigned long) zcrypt_rng_buffer);
1420out:
1421 mutex_unlock(&zcrypt_rng_mutex);
1422 return rc;
1423}
1424
1425void zcrypt_rng_device_remove(void)
1426{
1427 mutex_lock(&zcrypt_rng_mutex);
1428 zcrypt_rng_device_count--;
1429 if (zcrypt_rng_device_count == 0) {
1430 hwrng_unregister(&zcrypt_rng_dev);
1431 free_page((unsigned long) zcrypt_rng_buffer);
1432 }
1433 mutex_unlock(&zcrypt_rng_mutex);
1434}
1435
1436int __init zcrypt_debug_init(void)
1437{
1438 zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1439 DBF_MAX_SPRINTF_ARGS * sizeof(long));
1440 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1441 debug_set_level(zcrypt_dbf_info, DBF_ERR);
1442
1443 return 0;
1444}
1445
1446void zcrypt_debug_exit(void)
1447{
1448 debug_unregister(zcrypt_dbf_info);
1449}
1450
1451
1452
1453
1454
1455
1456int __init zcrypt_api_init(void)
1457{
1458 int rc;
1459
1460 rc = zcrypt_debug_init();
1461 if (rc)
1462 goto out;
1463
1464 atomic_set(&zcrypt_rescan_req, 0);
1465
1466
1467 rc = misc_register(&zcrypt_misc_device);
1468 if (rc < 0)
1469 goto out;
1470
1471
1472 zcrypt_entry = proc_create("driver/z90crypt", 0644, NULL,
1473 &zcrypt_proc_fops);
1474 if (!zcrypt_entry) {
1475 rc = -ENOMEM;
1476 goto out_misc;
1477 }
1478
1479 zcrypt_msgtype6_init();
1480 zcrypt_msgtype50_init();
1481 return 0;
1482
1483out_misc:
1484 misc_deregister(&zcrypt_misc_device);
1485out:
1486 return rc;
1487}
1488
1489
1490
1491
1492
1493
1494void __exit zcrypt_api_exit(void)
1495{
1496 remove_proc_entry("driver/z90crypt", NULL);
1497 misc_deregister(&zcrypt_misc_device);
1498 zcrypt_msgtype6_exit();
1499 zcrypt_msgtype50_exit();
1500 zcrypt_debug_exit();
1501}
1502
1503module_init(zcrypt_api_init);
1504module_exit(zcrypt_api_exit);
1505
