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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 <asm/uaccess.h>
40#include <linux/hw_random.h>
41#include <linux/debugfs.h>
42#include <asm/debug.h>
43
44#include "zcrypt_debug.h"
45#include "zcrypt_api.h"
46
47#include "zcrypt_msgtype6.h"
48
49
50
51
52MODULE_AUTHOR("IBM Corporation");
53MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
54 "Copyright IBM Corp. 2001, 2012");
55MODULE_LICENSE("GPL");
56
57static int zcrypt_hwrng_seed = 1;
58module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, S_IRUSR|S_IRGRP);
59MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
60
61static DEFINE_SPINLOCK(zcrypt_device_lock);
62static LIST_HEAD(zcrypt_device_list);
63static int zcrypt_device_count = 0;
64static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
65static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
66
67atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
68EXPORT_SYMBOL(zcrypt_rescan_req);
69
70static int zcrypt_rng_device_add(void);
71static void zcrypt_rng_device_remove(void);
72
73static DEFINE_SPINLOCK(zcrypt_ops_list_lock);
74static LIST_HEAD(zcrypt_ops_list);
75
76static debug_info_t *zcrypt_dbf_common;
77static debug_info_t *zcrypt_dbf_devices;
78static struct dentry *debugfs_root;
79
80
81
82
83static ssize_t zcrypt_type_show(struct device *dev,
84 struct device_attribute *attr, char *buf)
85{
86 struct zcrypt_device *zdev = to_ap_dev(dev)->private;
87 return snprintf(buf, PAGE_SIZE, "%s\n", zdev->type_string);
88}
89
90static DEVICE_ATTR(type, 0444, zcrypt_type_show, NULL);
91
92static ssize_t zcrypt_online_show(struct device *dev,
93 struct device_attribute *attr, char *buf)
94{
95 struct zcrypt_device *zdev = to_ap_dev(dev)->private;
96 return snprintf(buf, PAGE_SIZE, "%d\n", zdev->online);
97}
98
99static ssize_t zcrypt_online_store(struct device *dev,
100 struct device_attribute *attr,
101 const char *buf, size_t count)
102{
103 struct zcrypt_device *zdev = to_ap_dev(dev)->private;
104 int online;
105
106 if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
107 return -EINVAL;
108 zdev->online = online;
109 ZCRYPT_DBF_DEV(DBF_INFO, zdev, "dev%04xo%dman", zdev->ap_dev->qid,
110 zdev->online);
111 if (!online)
112 ap_flush_queue(zdev->ap_dev);
113 return count;
114}
115
116static DEVICE_ATTR(online, 0644, zcrypt_online_show, zcrypt_online_store);
117
118static struct attribute * zcrypt_device_attrs[] = {
119 &dev_attr_type.attr,
120 &dev_attr_online.attr,
121 NULL,
122};
123
124static struct attribute_group zcrypt_device_attr_group = {
125 .attrs = zcrypt_device_attrs,
126};
127
128
129
130
131
132
133static inline int zcrypt_process_rescan(void)
134{
135 if (atomic_read(&zcrypt_rescan_req)) {
136 atomic_set(&zcrypt_rescan_req, 0);
137 atomic_inc(&zcrypt_rescan_count);
138 ap_bus_force_rescan();
139 ZCRYPT_DBF_COMMON(DBF_INFO, "rescan%07d",
140 atomic_inc_return(&zcrypt_rescan_count));
141 return 1;
142 }
143 return 0;
144}
145
146
147
148
149
150
151
152
153
154static void __zcrypt_increase_preference(struct zcrypt_device *zdev)
155{
156 struct zcrypt_device *tmp;
157 struct list_head *l;
158
159 if (zdev->speed_rating == 0)
160 return;
161 for (l = zdev->list.prev; l != &zcrypt_device_list; l = l->prev) {
162 tmp = list_entry(l, struct zcrypt_device, list);
163 if ((tmp->request_count + 1) * tmp->speed_rating <=
164 (zdev->request_count + 1) * zdev->speed_rating &&
165 tmp->speed_rating != 0)
166 break;
167 }
168 if (l == zdev->list.prev)
169 return;
170
171 list_move(&zdev->list, l);
172}
173
174
175
176
177
178
179
180
181
182static void __zcrypt_decrease_preference(struct zcrypt_device *zdev)
183{
184 struct zcrypt_device *tmp;
185 struct list_head *l;
186
187 if (zdev->speed_rating == 0)
188 return;
189 for (l = zdev->list.next; l != &zcrypt_device_list; l = l->next) {
190 tmp = list_entry(l, struct zcrypt_device, list);
191 if ((tmp->request_count + 1) * tmp->speed_rating >
192 (zdev->request_count + 1) * zdev->speed_rating ||
193 tmp->speed_rating == 0)
194 break;
195 }
196 if (l == zdev->list.next)
197 return;
198
199 list_move_tail(&zdev->list, l);
200}
201
202static void zcrypt_device_release(struct kref *kref)
203{
204 struct zcrypt_device *zdev =
205 container_of(kref, struct zcrypt_device, refcount);
206 zcrypt_device_free(zdev);
207}
208
209void zcrypt_device_get(struct zcrypt_device *zdev)
210{
211 kref_get(&zdev->refcount);
212}
213EXPORT_SYMBOL(zcrypt_device_get);
214
215int zcrypt_device_put(struct zcrypt_device *zdev)
216{
217 return kref_put(&zdev->refcount, zcrypt_device_release);
218}
219EXPORT_SYMBOL(zcrypt_device_put);
220
221struct zcrypt_device *zcrypt_device_alloc(size_t max_response_size)
222{
223 struct zcrypt_device *zdev;
224
225 zdev = kzalloc(sizeof(struct zcrypt_device), GFP_KERNEL);
226 if (!zdev)
227 return NULL;
228 zdev->reply.message = kmalloc(max_response_size, GFP_KERNEL);
229 if (!zdev->reply.message)
230 goto out_free;
231 zdev->reply.length = max_response_size;
232 spin_lock_init(&zdev->lock);
233 INIT_LIST_HEAD(&zdev->list);
234 zdev->dbf_area = zcrypt_dbf_devices;
235 return zdev;
236
237out_free:
238 kfree(zdev);
239 return NULL;
240}
241EXPORT_SYMBOL(zcrypt_device_alloc);
242
243void zcrypt_device_free(struct zcrypt_device *zdev)
244{
245 kfree(zdev->reply.message);
246 kfree(zdev);
247}
248EXPORT_SYMBOL(zcrypt_device_free);
249
250
251
252
253
254
255
256int zcrypt_device_register(struct zcrypt_device *zdev)
257{
258 int rc;
259
260 if (!zdev->ops)
261 return -ENODEV;
262 rc = sysfs_create_group(&zdev->ap_dev->device.kobj,
263 &zcrypt_device_attr_group);
264 if (rc)
265 goto out;
266 get_device(&zdev->ap_dev->device);
267 kref_init(&zdev->refcount);
268 spin_lock_bh(&zcrypt_device_lock);
269 zdev->online = 1;
270 ZCRYPT_DBF_DEV(DBF_INFO, zdev, "dev%04xo%dreg", zdev->ap_dev->qid,
271 zdev->online);
272 list_add_tail(&zdev->list, &zcrypt_device_list);
273 __zcrypt_increase_preference(zdev);
274 zcrypt_device_count++;
275 spin_unlock_bh(&zcrypt_device_lock);
276 if (zdev->ops->rng) {
277 rc = zcrypt_rng_device_add();
278 if (rc)
279 goto out_unregister;
280 }
281 return 0;
282
283out_unregister:
284 spin_lock_bh(&zcrypt_device_lock);
285 zcrypt_device_count--;
286 list_del_init(&zdev->list);
287 spin_unlock_bh(&zcrypt_device_lock);
288 sysfs_remove_group(&zdev->ap_dev->device.kobj,
289 &zcrypt_device_attr_group);
290 put_device(&zdev->ap_dev->device);
291 zcrypt_device_put(zdev);
292out:
293 return rc;
294}
295EXPORT_SYMBOL(zcrypt_device_register);
296
297
298
299
300
301
302
303void zcrypt_device_unregister(struct zcrypt_device *zdev)
304{
305 if (zdev->ops->rng)
306 zcrypt_rng_device_remove();
307 spin_lock_bh(&zcrypt_device_lock);
308 zcrypt_device_count--;
309 list_del_init(&zdev->list);
310 spin_unlock_bh(&zcrypt_device_lock);
311 sysfs_remove_group(&zdev->ap_dev->device.kobj,
312 &zcrypt_device_attr_group);
313 put_device(&zdev->ap_dev->device);
314 zcrypt_device_put(zdev);
315}
316EXPORT_SYMBOL(zcrypt_device_unregister);
317
318void zcrypt_msgtype_register(struct zcrypt_ops *zops)
319{
320 if (zops->owner) {
321 spin_lock_bh(&zcrypt_ops_list_lock);
322 list_add_tail(&zops->list, &zcrypt_ops_list);
323 spin_unlock_bh(&zcrypt_ops_list_lock);
324 }
325}
326EXPORT_SYMBOL(zcrypt_msgtype_register);
327
328void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
329{
330 spin_lock_bh(&zcrypt_ops_list_lock);
331 list_del_init(&zops->list);
332 spin_unlock_bh(&zcrypt_ops_list_lock);
333}
334EXPORT_SYMBOL(zcrypt_msgtype_unregister);
335
336static inline
337struct zcrypt_ops *__ops_lookup(unsigned char *name, int variant)
338{
339 struct zcrypt_ops *zops;
340 int found = 0;
341
342 spin_lock_bh(&zcrypt_ops_list_lock);
343 list_for_each_entry(zops, &zcrypt_ops_list, list) {
344 if ((zops->variant == variant) &&
345 (!strncmp(zops->owner->name, name, MODULE_NAME_LEN))) {
346 found = 1;
347 break;
348 }
349 }
350 if (!found || !try_module_get(zops->owner))
351 zops = NULL;
352
353 spin_unlock_bh(&zcrypt_ops_list_lock);
354
355 return zops;
356}
357
358struct zcrypt_ops *zcrypt_msgtype_request(unsigned char *name, int variant)
359{
360 struct zcrypt_ops *zops = NULL;
361
362 zops = __ops_lookup(name, variant);
363 if (!zops) {
364 request_module("%s", name);
365 zops = __ops_lookup(name, variant);
366 }
367 return zops;
368}
369EXPORT_SYMBOL(zcrypt_msgtype_request);
370
371void zcrypt_msgtype_release(struct zcrypt_ops *zops)
372{
373 if (zops)
374 module_put(zops->owner);
375}
376EXPORT_SYMBOL(zcrypt_msgtype_release);
377
378
379
380
381
382
383static ssize_t zcrypt_read(struct file *filp, char __user *buf,
384 size_t count, loff_t *f_pos)
385{
386 return -EPERM;
387}
388
389
390
391
392
393
394static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
395 size_t count, loff_t *f_pos)
396{
397 return -EPERM;
398}
399
400
401
402
403
404
405static int zcrypt_open(struct inode *inode, struct file *filp)
406{
407 atomic_inc(&zcrypt_open_count);
408 return nonseekable_open(inode, filp);
409}
410
411
412
413
414
415
416static int zcrypt_release(struct inode *inode, struct file *filp)
417{
418 atomic_dec(&zcrypt_open_count);
419 return 0;
420}
421
422
423
424
425static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
426{
427 struct zcrypt_device *zdev;
428 int rc;
429
430 if (mex->outputdatalength < mex->inputdatalength)
431 return -EINVAL;
432
433
434
435
436
437 mex->outputdatalength = mex->inputdatalength;
438
439 spin_lock_bh(&zcrypt_device_lock);
440 list_for_each_entry(zdev, &zcrypt_device_list, list) {
441 if (!zdev->online ||
442 !zdev->ops->rsa_modexpo ||
443 zdev->min_mod_size > mex->inputdatalength ||
444 zdev->max_mod_size < mex->inputdatalength)
445 continue;
446 zcrypt_device_get(zdev);
447 get_device(&zdev->ap_dev->device);
448 zdev->request_count++;
449 __zcrypt_decrease_preference(zdev);
450 if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
451 spin_unlock_bh(&zcrypt_device_lock);
452 rc = zdev->ops->rsa_modexpo(zdev, mex);
453 spin_lock_bh(&zcrypt_device_lock);
454 module_put(zdev->ap_dev->drv->driver.owner);
455 }
456 else
457 rc = -EAGAIN;
458 zdev->request_count--;
459 __zcrypt_increase_preference(zdev);
460 put_device(&zdev->ap_dev->device);
461 zcrypt_device_put(zdev);
462 spin_unlock_bh(&zcrypt_device_lock);
463 return rc;
464 }
465 spin_unlock_bh(&zcrypt_device_lock);
466 return -ENODEV;
467}
468
469static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
470{
471 struct zcrypt_device *zdev;
472 unsigned long long z1, z2, z3;
473 int rc, copied;
474
475 if (crt->outputdatalength < crt->inputdatalength ||
476 (crt->inputdatalength & 1))
477 return -EINVAL;
478
479
480
481
482
483 crt->outputdatalength = crt->inputdatalength;
484
485 copied = 0;
486 restart:
487 spin_lock_bh(&zcrypt_device_lock);
488 list_for_each_entry(zdev, &zcrypt_device_list, list) {
489 if (!zdev->online ||
490 !zdev->ops->rsa_modexpo_crt ||
491 zdev->min_mod_size > crt->inputdatalength ||
492 zdev->max_mod_size < crt->inputdatalength)
493 continue;
494 if (zdev->short_crt && crt->inputdatalength > 240) {
495
496
497
498
499
500 if (copied == 0) {
501 unsigned int len;
502 spin_unlock_bh(&zcrypt_device_lock);
503
504
505
506
507
508 if (crt->inputdatalength <= 256)
509 len = crt->inputdatalength / 2 - 120;
510 else
511 len = 8;
512 if (len > sizeof(z1))
513 return -EFAULT;
514 z1 = z2 = z3 = 0;
515 if (copy_from_user(&z1, crt->np_prime, len) ||
516 copy_from_user(&z2, crt->bp_key, len) ||
517 copy_from_user(&z3, crt->u_mult_inv, len))
518 return -EFAULT;
519 z1 = z2 = z3 = 0;
520 copied = 1;
521
522
523
524
525 goto restart;
526 }
527 if (z1 != 0ULL || z2 != 0ULL || z3 != 0ULL)
528
529 continue;
530 }
531 zcrypt_device_get(zdev);
532 get_device(&zdev->ap_dev->device);
533 zdev->request_count++;
534 __zcrypt_decrease_preference(zdev);
535 if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
536 spin_unlock_bh(&zcrypt_device_lock);
537 rc = zdev->ops->rsa_modexpo_crt(zdev, crt);
538 spin_lock_bh(&zcrypt_device_lock);
539 module_put(zdev->ap_dev->drv->driver.owner);
540 }
541 else
542 rc = -EAGAIN;
543 zdev->request_count--;
544 __zcrypt_increase_preference(zdev);
545 put_device(&zdev->ap_dev->device);
546 zcrypt_device_put(zdev);
547 spin_unlock_bh(&zcrypt_device_lock);
548 return rc;
549 }
550 spin_unlock_bh(&zcrypt_device_lock);
551 return -ENODEV;
552}
553
554static long zcrypt_send_cprb(struct ica_xcRB *xcRB)
555{
556 struct zcrypt_device *zdev;
557 int rc;
558
559 spin_lock_bh(&zcrypt_device_lock);
560 list_for_each_entry(zdev, &zcrypt_device_list, list) {
561 if (!zdev->online || !zdev->ops->send_cprb ||
562 (zdev->ops->variant == MSGTYPE06_VARIANT_EP11) ||
563 (xcRB->user_defined != AUTOSELECT &&
564 AP_QID_DEVICE(zdev->ap_dev->qid) != xcRB->user_defined))
565 continue;
566 zcrypt_device_get(zdev);
567 get_device(&zdev->ap_dev->device);
568 zdev->request_count++;
569 __zcrypt_decrease_preference(zdev);
570 if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
571 spin_unlock_bh(&zcrypt_device_lock);
572 rc = zdev->ops->send_cprb(zdev, xcRB);
573 spin_lock_bh(&zcrypt_device_lock);
574 module_put(zdev->ap_dev->drv->driver.owner);
575 }
576 else
577 rc = -EAGAIN;
578 zdev->request_count--;
579 __zcrypt_increase_preference(zdev);
580 put_device(&zdev->ap_dev->device);
581 zcrypt_device_put(zdev);
582 spin_unlock_bh(&zcrypt_device_lock);
583 return rc;
584 }
585 spin_unlock_bh(&zcrypt_device_lock);
586 return -ENODEV;
587}
588
589struct ep11_target_dev_list {
590 unsigned short targets_num;
591 struct ep11_target_dev *targets;
592};
593
594static bool is_desired_ep11dev(unsigned int dev_qid,
595 struct ep11_target_dev_list dev_list)
596{
597 int n;
598
599 for (n = 0; n < dev_list.targets_num; n++, dev_list.targets++) {
600 if ((AP_QID_DEVICE(dev_qid) == dev_list.targets->ap_id) &&
601 (AP_QID_QUEUE(dev_qid) == dev_list.targets->dom_id)) {
602 return true;
603 }
604 }
605 return false;
606}
607
608static long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
609{
610 struct zcrypt_device *zdev;
611 bool autoselect = false;
612 int rc;
613 struct ep11_target_dev_list ep11_dev_list = {
614 .targets_num = 0x00,
615 .targets = NULL,
616 };
617
618 ep11_dev_list.targets_num = (unsigned short) xcrb->targets_num;
619
620
621 if (ep11_dev_list.targets_num == 0)
622 autoselect = true;
623 else {
624 ep11_dev_list.targets = kcalloc((unsigned short)
625 xcrb->targets_num,
626 sizeof(struct ep11_target_dev),
627 GFP_KERNEL);
628 if (!ep11_dev_list.targets)
629 return -ENOMEM;
630
631 if (copy_from_user(ep11_dev_list.targets,
632 (struct ep11_target_dev __force __user *)
633 xcrb->targets, xcrb->targets_num *
634 sizeof(struct ep11_target_dev)))
635 return -EFAULT;
636 }
637
638 spin_lock_bh(&zcrypt_device_lock);
639 list_for_each_entry(zdev, &zcrypt_device_list, list) {
640
641 if (!zdev->online ||
642 zdev->ops->variant != MSGTYPE06_VARIANT_EP11)
643 continue;
644
645
646 if (!is_desired_ep11dev(zdev->ap_dev->qid, ep11_dev_list) &&
647 !autoselect)
648 continue;
649
650 zcrypt_device_get(zdev);
651 get_device(&zdev->ap_dev->device);
652 zdev->request_count++;
653 __zcrypt_decrease_preference(zdev);
654 if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
655 spin_unlock_bh(&zcrypt_device_lock);
656 rc = zdev->ops->send_ep11_cprb(zdev, xcrb);
657 spin_lock_bh(&zcrypt_device_lock);
658 module_put(zdev->ap_dev->drv->driver.owner);
659 } else {
660 rc = -EAGAIN;
661 }
662 zdev->request_count--;
663 __zcrypt_increase_preference(zdev);
664 put_device(&zdev->ap_dev->device);
665 zcrypt_device_put(zdev);
666 spin_unlock_bh(&zcrypt_device_lock);
667 return rc;
668 }
669 spin_unlock_bh(&zcrypt_device_lock);
670 return -ENODEV;
671}
672
673static long zcrypt_rng(char *buffer)
674{
675 struct zcrypt_device *zdev;
676 int rc;
677
678 spin_lock_bh(&zcrypt_device_lock);
679 list_for_each_entry(zdev, &zcrypt_device_list, list) {
680 if (!zdev->online || !zdev->ops->rng)
681 continue;
682 zcrypt_device_get(zdev);
683 get_device(&zdev->ap_dev->device);
684 zdev->request_count++;
685 __zcrypt_decrease_preference(zdev);
686 if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
687 spin_unlock_bh(&zcrypt_device_lock);
688 rc = zdev->ops->rng(zdev, buffer);
689 spin_lock_bh(&zcrypt_device_lock);
690 module_put(zdev->ap_dev->drv->driver.owner);
691 } else
692 rc = -EAGAIN;
693 zdev->request_count--;
694 __zcrypt_increase_preference(zdev);
695 put_device(&zdev->ap_dev->device);
696 zcrypt_device_put(zdev);
697 spin_unlock_bh(&zcrypt_device_lock);
698 return rc;
699 }
700 spin_unlock_bh(&zcrypt_device_lock);
701 return -ENODEV;
702}
703
704static void zcrypt_status_mask(char status[AP_DEVICES])
705{
706 struct zcrypt_device *zdev;
707
708 memset(status, 0, sizeof(char) * AP_DEVICES);
709 spin_lock_bh(&zcrypt_device_lock);
710 list_for_each_entry(zdev, &zcrypt_device_list, list)
711 status[AP_QID_DEVICE(zdev->ap_dev->qid)] =
712 zdev->online ? zdev->user_space_type : 0x0d;
713 spin_unlock_bh(&zcrypt_device_lock);
714}
715
716static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES])
717{
718 struct zcrypt_device *zdev;
719
720 memset(qdepth, 0, sizeof(char) * AP_DEVICES);
721 spin_lock_bh(&zcrypt_device_lock);
722 list_for_each_entry(zdev, &zcrypt_device_list, list) {
723 spin_lock(&zdev->ap_dev->lock);
724 qdepth[AP_QID_DEVICE(zdev->ap_dev->qid)] =
725 zdev->ap_dev->pendingq_count +
726 zdev->ap_dev->requestq_count;
727 spin_unlock(&zdev->ap_dev->lock);
728 }
729 spin_unlock_bh(&zcrypt_device_lock);
730}
731
732static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES])
733{
734 struct zcrypt_device *zdev;
735
736 memset(reqcnt, 0, sizeof(int) * AP_DEVICES);
737 spin_lock_bh(&zcrypt_device_lock);
738 list_for_each_entry(zdev, &zcrypt_device_list, list) {
739 spin_lock(&zdev->ap_dev->lock);
740 reqcnt[AP_QID_DEVICE(zdev->ap_dev->qid)] =
741 zdev->ap_dev->total_request_count;
742 spin_unlock(&zdev->ap_dev->lock);
743 }
744 spin_unlock_bh(&zcrypt_device_lock);
745}
746
747static int zcrypt_pendingq_count(void)
748{
749 struct zcrypt_device *zdev;
750 int pendingq_count = 0;
751
752 spin_lock_bh(&zcrypt_device_lock);
753 list_for_each_entry(zdev, &zcrypt_device_list, list) {
754 spin_lock(&zdev->ap_dev->lock);
755 pendingq_count += zdev->ap_dev->pendingq_count;
756 spin_unlock(&zdev->ap_dev->lock);
757 }
758 spin_unlock_bh(&zcrypt_device_lock);
759 return pendingq_count;
760}
761
762static int zcrypt_requestq_count(void)
763{
764 struct zcrypt_device *zdev;
765 int requestq_count = 0;
766
767 spin_lock_bh(&zcrypt_device_lock);
768 list_for_each_entry(zdev, &zcrypt_device_list, list) {
769 spin_lock(&zdev->ap_dev->lock);
770 requestq_count += zdev->ap_dev->requestq_count;
771 spin_unlock(&zdev->ap_dev->lock);
772 }
773 spin_unlock_bh(&zcrypt_device_lock);
774 return requestq_count;
775}
776
777static int zcrypt_count_type(int type)
778{
779 struct zcrypt_device *zdev;
780 int device_count = 0;
781
782 spin_lock_bh(&zcrypt_device_lock);
783 list_for_each_entry(zdev, &zcrypt_device_list, list)
784 if (zdev->user_space_type == type)
785 device_count++;
786 spin_unlock_bh(&zcrypt_device_lock);
787 return device_count;
788}
789
790
791
792
793
794
795static long zcrypt_ica_status(struct file *filp, unsigned long arg)
796{
797 struct ica_z90_status *pstat;
798 int ret;
799
800 pstat = kzalloc(sizeof(*pstat), GFP_KERNEL);
801 if (!pstat)
802 return -ENOMEM;
803 pstat->totalcount = zcrypt_device_count;
804 pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA);
805 pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC);
806 pstat->requestqWaitCount = zcrypt_requestq_count();
807 pstat->pendingqWaitCount = zcrypt_pendingq_count();
808 pstat->totalOpenCount = atomic_read(&zcrypt_open_count);
809 pstat->cryptoDomain = ap_domain_index;
810 zcrypt_status_mask(pstat->status);
811 zcrypt_qdepth_mask(pstat->qdepth);
812 ret = 0;
813 if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat)))
814 ret = -EFAULT;
815 kfree(pstat);
816 return ret;
817}
818
819static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
820 unsigned long arg)
821{
822 int rc;
823
824 switch (cmd) {
825 case ICARSAMODEXPO: {
826 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
827 struct ica_rsa_modexpo mex;
828 if (copy_from_user(&mex, umex, sizeof(mex)))
829 return -EFAULT;
830 do {
831 rc = zcrypt_rsa_modexpo(&mex);
832 } while (rc == -EAGAIN);
833
834 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
835 do {
836 rc = zcrypt_rsa_modexpo(&mex);
837 } while (rc == -EAGAIN);
838 if (rc)
839 return rc;
840 return put_user(mex.outputdatalength, &umex->outputdatalength);
841 }
842 case ICARSACRT: {
843 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
844 struct ica_rsa_modexpo_crt crt;
845 if (copy_from_user(&crt, ucrt, sizeof(crt)))
846 return -EFAULT;
847 do {
848 rc = zcrypt_rsa_crt(&crt);
849 } while (rc == -EAGAIN);
850
851 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
852 do {
853 rc = zcrypt_rsa_crt(&crt);
854 } while (rc == -EAGAIN);
855 if (rc)
856 return rc;
857 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
858 }
859 case ZSECSENDCPRB: {
860 struct ica_xcRB __user *uxcRB = (void __user *) arg;
861 struct ica_xcRB xcRB;
862 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
863 return -EFAULT;
864 do {
865 rc = zcrypt_send_cprb(&xcRB);
866 } while (rc == -EAGAIN);
867
868 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
869 do {
870 rc = zcrypt_send_cprb(&xcRB);
871 } while (rc == -EAGAIN);
872 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
873 return -EFAULT;
874 return rc;
875 }
876 case ZSENDEP11CPRB: {
877 struct ep11_urb __user *uxcrb = (void __user *)arg;
878 struct ep11_urb xcrb;
879 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
880 return -EFAULT;
881 do {
882 rc = zcrypt_send_ep11_cprb(&xcrb);
883 } while (rc == -EAGAIN);
884
885 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
886 do {
887 rc = zcrypt_send_ep11_cprb(&xcrb);
888 } while (rc == -EAGAIN);
889 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
890 return -EFAULT;
891 return rc;
892 }
893 case Z90STAT_STATUS_MASK: {
894 char status[AP_DEVICES];
895 zcrypt_status_mask(status);
896 if (copy_to_user((char __user *) arg, status,
897 sizeof(char) * AP_DEVICES))
898 return -EFAULT;
899 return 0;
900 }
901 case Z90STAT_QDEPTH_MASK: {
902 char qdepth[AP_DEVICES];
903 zcrypt_qdepth_mask(qdepth);
904 if (copy_to_user((char __user *) arg, qdepth,
905 sizeof(char) * AP_DEVICES))
906 return -EFAULT;
907 return 0;
908 }
909 case Z90STAT_PERDEV_REQCNT: {
910 int reqcnt[AP_DEVICES];
911 zcrypt_perdev_reqcnt(reqcnt);
912 if (copy_to_user((int __user *) arg, reqcnt,
913 sizeof(int) * AP_DEVICES))
914 return -EFAULT;
915 return 0;
916 }
917 case Z90STAT_REQUESTQ_COUNT:
918 return put_user(zcrypt_requestq_count(), (int __user *) arg);
919 case Z90STAT_PENDINGQ_COUNT:
920 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
921 case Z90STAT_TOTALOPEN_COUNT:
922 return put_user(atomic_read(&zcrypt_open_count),
923 (int __user *) arg);
924 case Z90STAT_DOMAIN_INDEX:
925 return put_user(ap_domain_index, (int __user *) arg);
926
927
928
929
930
931 case ICAZ90STATUS:
932 return zcrypt_ica_status(filp, arg);
933 case Z90STAT_TOTALCOUNT:
934 return put_user(zcrypt_device_count, (int __user *) arg);
935 case Z90STAT_PCICACOUNT:
936 return put_user(zcrypt_count_type(ZCRYPT_PCICA),
937 (int __user *) arg);
938 case Z90STAT_PCICCCOUNT:
939 return put_user(zcrypt_count_type(ZCRYPT_PCICC),
940 (int __user *) arg);
941 case Z90STAT_PCIXCCMCL2COUNT:
942 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2),
943 (int __user *) arg);
944 case Z90STAT_PCIXCCMCL3COUNT:
945 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
946 (int __user *) arg);
947 case Z90STAT_PCIXCCCOUNT:
948 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) +
949 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
950 (int __user *) arg);
951 case Z90STAT_CEX2CCOUNT:
952 return put_user(zcrypt_count_type(ZCRYPT_CEX2C),
953 (int __user *) arg);
954 case Z90STAT_CEX2ACOUNT:
955 return put_user(zcrypt_count_type(ZCRYPT_CEX2A),
956 (int __user *) arg);
957 default:
958
959 return -ENOIOCTLCMD;
960 }
961}
962
963#ifdef CONFIG_COMPAT
964
965
966
967struct compat_ica_rsa_modexpo {
968 compat_uptr_t inputdata;
969 unsigned int inputdatalength;
970 compat_uptr_t outputdata;
971 unsigned int outputdatalength;
972 compat_uptr_t b_key;
973 compat_uptr_t n_modulus;
974};
975
976static long trans_modexpo32(struct file *filp, unsigned int cmd,
977 unsigned long arg)
978{
979 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
980 struct compat_ica_rsa_modexpo mex32;
981 struct ica_rsa_modexpo mex64;
982 long rc;
983
984 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
985 return -EFAULT;
986 mex64.inputdata = compat_ptr(mex32.inputdata);
987 mex64.inputdatalength = mex32.inputdatalength;
988 mex64.outputdata = compat_ptr(mex32.outputdata);
989 mex64.outputdatalength = mex32.outputdatalength;
990 mex64.b_key = compat_ptr(mex32.b_key);
991 mex64.n_modulus = compat_ptr(mex32.n_modulus);
992 do {
993 rc = zcrypt_rsa_modexpo(&mex64);
994 } while (rc == -EAGAIN);
995
996 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
997 do {
998 rc = zcrypt_rsa_modexpo(&mex64);
999 } while (rc == -EAGAIN);
1000 if (rc)
1001 return rc;
1002 return put_user(mex64.outputdatalength,
1003 &umex32->outputdatalength);
1004}
1005
1006struct compat_ica_rsa_modexpo_crt {
1007 compat_uptr_t inputdata;
1008 unsigned int inputdatalength;
1009 compat_uptr_t outputdata;
1010 unsigned int outputdatalength;
1011 compat_uptr_t bp_key;
1012 compat_uptr_t bq_key;
1013 compat_uptr_t np_prime;
1014 compat_uptr_t nq_prime;
1015 compat_uptr_t u_mult_inv;
1016};
1017
1018static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
1019 unsigned long arg)
1020{
1021 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1022 struct compat_ica_rsa_modexpo_crt crt32;
1023 struct ica_rsa_modexpo_crt crt64;
1024 long rc;
1025
1026 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1027 return -EFAULT;
1028 crt64.inputdata = compat_ptr(crt32.inputdata);
1029 crt64.inputdatalength = crt32.inputdatalength;
1030 crt64.outputdata= compat_ptr(crt32.outputdata);
1031 crt64.outputdatalength = crt32.outputdatalength;
1032 crt64.bp_key = compat_ptr(crt32.bp_key);
1033 crt64.bq_key = compat_ptr(crt32.bq_key);
1034 crt64.np_prime = compat_ptr(crt32.np_prime);
1035 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1036 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1037 do {
1038 rc = zcrypt_rsa_crt(&crt64);
1039 } while (rc == -EAGAIN);
1040
1041 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1042 do {
1043 rc = zcrypt_rsa_crt(&crt64);
1044 } while (rc == -EAGAIN);
1045 if (rc)
1046 return rc;
1047 return put_user(crt64.outputdatalength,
1048 &ucrt32->outputdatalength);
1049}
1050
1051struct compat_ica_xcRB {
1052 unsigned short agent_ID;
1053 unsigned int user_defined;
1054 unsigned short request_ID;
1055 unsigned int request_control_blk_length;
1056 unsigned char padding1[16 - sizeof (compat_uptr_t)];
1057 compat_uptr_t request_control_blk_addr;
1058 unsigned int request_data_length;
1059 char padding2[16 - sizeof (compat_uptr_t)];
1060 compat_uptr_t request_data_address;
1061 unsigned int reply_control_blk_length;
1062 char padding3[16 - sizeof (compat_uptr_t)];
1063 compat_uptr_t reply_control_blk_addr;
1064 unsigned int reply_data_length;
1065 char padding4[16 - sizeof (compat_uptr_t)];
1066 compat_uptr_t reply_data_addr;
1067 unsigned short priority_window;
1068 unsigned int status;
1069} __attribute__((packed));
1070
1071static long trans_xcRB32(struct file *filp, unsigned int cmd,
1072 unsigned long arg)
1073{
1074 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1075 struct compat_ica_xcRB xcRB32;
1076 struct ica_xcRB xcRB64;
1077 long rc;
1078
1079 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1080 return -EFAULT;
1081 xcRB64.agent_ID = xcRB32.agent_ID;
1082 xcRB64.user_defined = xcRB32.user_defined;
1083 xcRB64.request_ID = xcRB32.request_ID;
1084 xcRB64.request_control_blk_length =
1085 xcRB32.request_control_blk_length;
1086 xcRB64.request_control_blk_addr =
1087 compat_ptr(xcRB32.request_control_blk_addr);
1088 xcRB64.request_data_length =
1089 xcRB32.request_data_length;
1090 xcRB64.request_data_address =
1091 compat_ptr(xcRB32.request_data_address);
1092 xcRB64.reply_control_blk_length =
1093 xcRB32.reply_control_blk_length;
1094 xcRB64.reply_control_blk_addr =
1095 compat_ptr(xcRB32.reply_control_blk_addr);
1096 xcRB64.reply_data_length = xcRB32.reply_data_length;
1097 xcRB64.reply_data_addr =
1098 compat_ptr(xcRB32.reply_data_addr);
1099 xcRB64.priority_window = xcRB32.priority_window;
1100 xcRB64.status = xcRB32.status;
1101 do {
1102 rc = zcrypt_send_cprb(&xcRB64);
1103 } while (rc == -EAGAIN);
1104
1105 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1106 do {
1107 rc = zcrypt_send_cprb(&xcRB64);
1108 } while (rc == -EAGAIN);
1109 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1110 xcRB32.reply_data_length = xcRB64.reply_data_length;
1111 xcRB32.status = xcRB64.status;
1112 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1113 return -EFAULT;
1114 return rc;
1115}
1116
1117static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1118 unsigned long arg)
1119{
1120 if (cmd == ICARSAMODEXPO)
1121 return trans_modexpo32(filp, cmd, arg);
1122 if (cmd == ICARSACRT)
1123 return trans_modexpo_crt32(filp, cmd, arg);
1124 if (cmd == ZSECSENDCPRB)
1125 return trans_xcRB32(filp, cmd, arg);
1126 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1127}
1128#endif
1129
1130
1131
1132
1133static const struct file_operations zcrypt_fops = {
1134 .owner = THIS_MODULE,
1135 .read = zcrypt_read,
1136 .write = zcrypt_write,
1137 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1138#ifdef CONFIG_COMPAT
1139 .compat_ioctl = zcrypt_compat_ioctl,
1140#endif
1141 .open = zcrypt_open,
1142 .release = zcrypt_release,
1143 .llseek = no_llseek,
1144};
1145
1146
1147
1148
1149static struct miscdevice zcrypt_misc_device = {
1150 .minor = MISC_DYNAMIC_MINOR,
1151 .name = "z90crypt",
1152 .fops = &zcrypt_fops,
1153};
1154
1155
1156
1157
1158static struct proc_dir_entry *zcrypt_entry;
1159
1160static void sprintcl(struct seq_file *m, unsigned char *addr, unsigned int len)
1161{
1162 int i;
1163
1164 for (i = 0; i < len; i++)
1165 seq_printf(m, "%01x", (unsigned int) addr[i]);
1166 seq_putc(m, ' ');
1167}
1168
1169static void sprintrw(struct seq_file *m, unsigned char *addr, unsigned int len)
1170{
1171 int inl, c, cx;
1172
1173 seq_printf(m, " ");
1174 inl = 0;
1175 for (c = 0; c < (len / 16); c++) {
1176 sprintcl(m, addr+inl, 16);
1177 inl += 16;
1178 }
1179 cx = len%16;
1180 if (cx) {
1181 sprintcl(m, addr+inl, cx);
1182 inl += cx;
1183 }
1184 seq_putc(m, '\n');
1185}
1186
1187static void sprinthx(unsigned char *title, struct seq_file *m,
1188 unsigned char *addr, unsigned int len)
1189{
1190 int inl, r, rx;
1191
1192 seq_printf(m, "\n%s\n", title);
1193 inl = 0;
1194 for (r = 0; r < (len / 64); r++) {
1195 sprintrw(m, addr+inl, 64);
1196 inl += 64;
1197 }
1198 rx = len % 64;
1199 if (rx) {
1200 sprintrw(m, addr+inl, rx);
1201 inl += rx;
1202 }
1203 seq_putc(m, '\n');
1204}
1205
1206static void sprinthx4(unsigned char *title, struct seq_file *m,
1207 unsigned int *array, unsigned int len)
1208{
1209 seq_printf(m, "\n%s\n", title);
1210 seq_hex_dump(m, " ", DUMP_PREFIX_NONE, 32, 4, array, len, false);
1211 seq_putc(m, '\n');
1212}
1213
1214static int zcrypt_proc_show(struct seq_file *m, void *v)
1215{
1216 char workarea[sizeof(int) * AP_DEVICES];
1217
1218 seq_printf(m, "\nzcrypt version: %d.%d.%d\n",
1219 ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT);
1220 seq_printf(m, "Cryptographic domain: %d\n", ap_domain_index);
1221 seq_printf(m, "Total device count: %d\n", zcrypt_device_count);
1222 seq_printf(m, "PCICA count: %d\n", zcrypt_count_type(ZCRYPT_PCICA));
1223 seq_printf(m, "PCICC count: %d\n", zcrypt_count_type(ZCRYPT_PCICC));
1224 seq_printf(m, "PCIXCC MCL2 count: %d\n",
1225 zcrypt_count_type(ZCRYPT_PCIXCC_MCL2));
1226 seq_printf(m, "PCIXCC MCL3 count: %d\n",
1227 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3));
1228 seq_printf(m, "CEX2C count: %d\n", zcrypt_count_type(ZCRYPT_CEX2C));
1229 seq_printf(m, "CEX2A count: %d\n", zcrypt_count_type(ZCRYPT_CEX2A));
1230 seq_printf(m, "CEX3C count: %d\n", zcrypt_count_type(ZCRYPT_CEX3C));
1231 seq_printf(m, "CEX3A count: %d\n", zcrypt_count_type(ZCRYPT_CEX3A));
1232 seq_printf(m, "requestq count: %d\n", zcrypt_requestq_count());
1233 seq_printf(m, "pendingq count: %d\n", zcrypt_pendingq_count());
1234 seq_printf(m, "Total open handles: %d\n\n",
1235 atomic_read(&zcrypt_open_count));
1236 zcrypt_status_mask(workarea);
1237 sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) "
1238 "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A",
1239 m, workarea, AP_DEVICES);
1240 zcrypt_qdepth_mask(workarea);
1241 sprinthx("Waiting work element counts", m, workarea, AP_DEVICES);
1242 zcrypt_perdev_reqcnt((int *) workarea);
1243 sprinthx4("Per-device successfully completed request counts",
1244 m, (unsigned int *) workarea, AP_DEVICES);
1245 return 0;
1246}
1247
1248static int zcrypt_proc_open(struct inode *inode, struct file *file)
1249{
1250 return single_open(file, zcrypt_proc_show, NULL);
1251}
1252
1253static void zcrypt_disable_card(int index)
1254{
1255 struct zcrypt_device *zdev;
1256
1257 spin_lock_bh(&zcrypt_device_lock);
1258 list_for_each_entry(zdev, &zcrypt_device_list, list)
1259 if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) {
1260 zdev->online = 0;
1261 ap_flush_queue(zdev->ap_dev);
1262 break;
1263 }
1264 spin_unlock_bh(&zcrypt_device_lock);
1265}
1266
1267static void zcrypt_enable_card(int index)
1268{
1269 struct zcrypt_device *zdev;
1270
1271 spin_lock_bh(&zcrypt_device_lock);
1272 list_for_each_entry(zdev, &zcrypt_device_list, list)
1273 if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) {
1274 zdev->online = 1;
1275 break;
1276 }
1277 spin_unlock_bh(&zcrypt_device_lock);
1278}
1279
1280static ssize_t zcrypt_proc_write(struct file *file, const char __user *buffer,
1281 size_t count, loff_t *pos)
1282{
1283 unsigned char *lbuf, *ptr;
1284 size_t local_count;
1285 int j;
1286
1287 if (count <= 0)
1288 return 0;
1289
1290#define LBUFSIZE 1200UL
1291 lbuf = kmalloc(LBUFSIZE, GFP_KERNEL);
1292 if (!lbuf)
1293 return 0;
1294
1295 local_count = min(LBUFSIZE - 1, count);
1296 if (copy_from_user(lbuf, buffer, local_count) != 0) {
1297 kfree(lbuf);
1298 return -EFAULT;
1299 }
1300 lbuf[local_count] = '\0';
1301
1302 ptr = strstr(lbuf, "Online devices");
1303 if (!ptr)
1304 goto out;
1305 ptr = strstr(ptr, "\n");
1306 if (!ptr)
1307 goto out;
1308 ptr++;
1309
1310 if (strstr(ptr, "Waiting work element counts") == NULL)
1311 goto out;
1312
1313 for (j = 0; j < 64 && *ptr; ptr++) {
1314
1315
1316
1317
1318
1319
1320 if (*ptr >= '0' && *ptr <= '8')
1321 j++;
1322 else if (*ptr == 'd' || *ptr == 'D')
1323 zcrypt_disable_card(j++);
1324 else if (*ptr == 'e' || *ptr == 'E')
1325 zcrypt_enable_card(j++);
1326 else if (*ptr != ' ' && *ptr != '\t')
1327 break;
1328 }
1329out:
1330 kfree(lbuf);
1331 return count;
1332}
1333
1334static const struct file_operations zcrypt_proc_fops = {
1335 .owner = THIS_MODULE,
1336 .open = zcrypt_proc_open,
1337 .read = seq_read,
1338 .llseek = seq_lseek,
1339 .release = single_release,
1340 .write = zcrypt_proc_write,
1341};
1342
1343static int zcrypt_rng_device_count;
1344static u32 *zcrypt_rng_buffer;
1345static int zcrypt_rng_buffer_index;
1346static DEFINE_MUTEX(zcrypt_rng_mutex);
1347
1348static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1349{
1350 int rc;
1351
1352
1353
1354
1355
1356 if (zcrypt_rng_buffer_index == 0) {
1357 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1358
1359 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1360 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1361 if (rc < 0)
1362 return -EIO;
1363 zcrypt_rng_buffer_index = rc / sizeof *data;
1364 }
1365 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1366 return sizeof *data;
1367}
1368
1369static struct hwrng zcrypt_rng_dev = {
1370 .name = "zcrypt",
1371 .data_read = zcrypt_rng_data_read,
1372 .quality = 990,
1373};
1374
1375static int zcrypt_rng_device_add(void)
1376{
1377 int rc = 0;
1378
1379 mutex_lock(&zcrypt_rng_mutex);
1380 if (zcrypt_rng_device_count == 0) {
1381 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1382 if (!zcrypt_rng_buffer) {
1383 rc = -ENOMEM;
1384 goto out;
1385 }
1386 zcrypt_rng_buffer_index = 0;
1387 if (!zcrypt_hwrng_seed)
1388 zcrypt_rng_dev.quality = 0;
1389 rc = hwrng_register(&zcrypt_rng_dev);
1390 if (rc)
1391 goto out_free;
1392 zcrypt_rng_device_count = 1;
1393 } else
1394 zcrypt_rng_device_count++;
1395 mutex_unlock(&zcrypt_rng_mutex);
1396 return 0;
1397
1398out_free:
1399 free_page((unsigned long) zcrypt_rng_buffer);
1400out:
1401 mutex_unlock(&zcrypt_rng_mutex);
1402 return rc;
1403}
1404
1405static void zcrypt_rng_device_remove(void)
1406{
1407 mutex_lock(&zcrypt_rng_mutex);
1408 zcrypt_rng_device_count--;
1409 if (zcrypt_rng_device_count == 0) {
1410 hwrng_unregister(&zcrypt_rng_dev);
1411 free_page((unsigned long) zcrypt_rng_buffer);
1412 }
1413 mutex_unlock(&zcrypt_rng_mutex);
1414}
1415
1416int __init zcrypt_debug_init(void)
1417{
1418 debugfs_root = debugfs_create_dir("zcrypt", NULL);
1419
1420 zcrypt_dbf_common = debug_register("zcrypt_common", 1, 1, 16);
1421 debug_register_view(zcrypt_dbf_common, &debug_hex_ascii_view);
1422 debug_set_level(zcrypt_dbf_common, DBF_ERR);
1423
1424 zcrypt_dbf_devices = debug_register("zcrypt_devices", 1, 1, 16);
1425 debug_register_view(zcrypt_dbf_devices, &debug_hex_ascii_view);
1426 debug_set_level(zcrypt_dbf_devices, DBF_ERR);
1427
1428 return 0;
1429}
1430
1431void zcrypt_debug_exit(void)
1432{
1433 debugfs_remove(debugfs_root);
1434 if (zcrypt_dbf_common)
1435 debug_unregister(zcrypt_dbf_common);
1436 if (zcrypt_dbf_devices)
1437 debug_unregister(zcrypt_dbf_devices);
1438}
1439
1440
1441
1442
1443
1444
1445int __init zcrypt_api_init(void)
1446{
1447 int rc;
1448
1449 rc = zcrypt_debug_init();
1450 if (rc)
1451 goto out;
1452
1453 atomic_set(&zcrypt_rescan_req, 0);
1454
1455
1456 rc = misc_register(&zcrypt_misc_device);
1457 if (rc < 0)
1458 goto out;
1459
1460
1461 zcrypt_entry = proc_create("driver/z90crypt", 0644, NULL, &zcrypt_proc_fops);
1462 if (!zcrypt_entry) {
1463 rc = -ENOMEM;
1464 goto out_misc;
1465 }
1466
1467 return 0;
1468
1469out_misc:
1470 misc_deregister(&zcrypt_misc_device);
1471out:
1472 return rc;
1473}
1474
1475
1476
1477
1478
1479
1480void zcrypt_api_exit(void)
1481{
1482 remove_proc_entry("driver/z90crypt", NULL);
1483 misc_deregister(&zcrypt_misc_device);
1484 zcrypt_debug_exit();
1485}
1486
1487module_init(zcrypt_api_init);
1488module_exit(zcrypt_api_exit);
1489
