xref: /openbmc/linux/drivers/s390/crypto/zcrypt_api.c (revision 151f4e2b)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  *  Copyright IBM Corp. 2001, 2018
4  *  Author(s): Robert Burroughs
5  *	       Eric Rossman (edrossma@us.ibm.com)
6  *	       Cornelia Huck <cornelia.huck@de.ibm.com>
7  *
8  *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
9  *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
10  *				  Ralph Wuerthner <rwuerthn@de.ibm.com>
11  *  MSGTYPE restruct:		  Holger Dengler <hd@linux.vnet.ibm.com>
12  *  Multiple device nodes: Harald Freudenberger <freude@linux.ibm.com>
13  */
14 
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/interrupt.h>
18 #include <linux/miscdevice.h>
19 #include <linux/fs.h>
20 #include <linux/compat.h>
21 #include <linux/slab.h>
22 #include <linux/atomic.h>
23 #include <linux/uaccess.h>
24 #include <linux/hw_random.h>
25 #include <linux/debugfs.h>
26 #include <linux/cdev.h>
27 #include <linux/ctype.h>
28 #include <asm/debug.h>
29 
30 #define CREATE_TRACE_POINTS
31 #include <asm/trace/zcrypt.h>
32 
33 #include "zcrypt_api.h"
34 #include "zcrypt_debug.h"
35 
36 #include "zcrypt_msgtype6.h"
37 #include "zcrypt_msgtype50.h"
38 
39 /*
40  * Module description.
41  */
42 MODULE_AUTHOR("IBM Corporation");
43 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
44 		   "Copyright IBM Corp. 2001, 2012");
45 MODULE_LICENSE("GPL");
46 
47 /*
48  * zcrypt tracepoint functions
49  */
50 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
51 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
52 
53 static int zcrypt_hwrng_seed = 1;
54 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
55 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
56 
57 DEFINE_SPINLOCK(zcrypt_list_lock);
58 LIST_HEAD(zcrypt_card_list);
59 int zcrypt_device_count;
60 
61 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
62 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
63 
64 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
65 EXPORT_SYMBOL(zcrypt_rescan_req);
66 
67 static LIST_HEAD(zcrypt_ops_list);
68 
69 /* Zcrypt related debug feature stuff. */
70 debug_info_t *zcrypt_dbf_info;
71 
72 /**
73  * Process a rescan of the transport layer.
74  *
75  * Returns 1, if the rescan has been processed, otherwise 0.
76  */
77 static inline int zcrypt_process_rescan(void)
78 {
79 	if (atomic_read(&zcrypt_rescan_req)) {
80 		atomic_set(&zcrypt_rescan_req, 0);
81 		atomic_inc(&zcrypt_rescan_count);
82 		ap_bus_force_rescan();
83 		ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
84 			   atomic_inc_return(&zcrypt_rescan_count));
85 		return 1;
86 	}
87 	return 0;
88 }
89 
90 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
91 {
92 	list_add_tail(&zops->list, &zcrypt_ops_list);
93 }
94 
95 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
96 {
97 	list_del_init(&zops->list);
98 }
99 
100 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
101 {
102 	struct zcrypt_ops *zops;
103 
104 	list_for_each_entry(zops, &zcrypt_ops_list, list)
105 		if ((zops->variant == variant) &&
106 		    (!strncmp(zops->name, name, sizeof(zops->name))))
107 			return zops;
108 	return NULL;
109 }
110 EXPORT_SYMBOL(zcrypt_msgtype);
111 
112 /*
113  * Multi device nodes extension functions.
114  */
115 
116 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
117 
118 struct zcdn_device;
119 
120 static struct class *zcrypt_class;
121 static dev_t zcrypt_devt;
122 static struct cdev zcrypt_cdev;
123 
124 struct zcdn_device {
125 	struct device device;
126 	struct ap_perms perms;
127 };
128 
129 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
130 
131 #define ZCDN_MAX_NAME 32
132 
133 static int zcdn_create(const char *name);
134 static int zcdn_destroy(const char *name);
135 
136 /* helper function, matches the name for find_zcdndev_by_name() */
137 static int __match_zcdn_name(struct device *dev, const void *data)
138 {
139 	return strcmp(dev_name(dev), (const char *)data) == 0;
140 }
141 
142 /* helper function, matches the devt value for find_zcdndev_by_devt() */
143 static int __match_zcdn_devt(struct device *dev, const void *data)
144 {
145 	return dev->devt == *((dev_t *) data);
146 }
147 
148 /*
149  * Find zcdn device by name.
150  * Returns reference to the zcdn device which needs to be released
151  * with put_device() after use.
152  */
153 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
154 {
155 	struct device *dev =
156 		class_find_device(zcrypt_class, NULL,
157 				  (void *) name,
158 				  __match_zcdn_name);
159 
160 	return dev ? to_zcdn_dev(dev) : NULL;
161 }
162 
163 /*
164  * Find zcdn device by devt value.
165  * Returns reference to the zcdn device which needs to be released
166  * with put_device() after use.
167  */
168 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
169 {
170 	struct device *dev =
171 		class_find_device(zcrypt_class, NULL,
172 				  (void *) &devt,
173 				  __match_zcdn_devt);
174 
175 	return dev ? to_zcdn_dev(dev) : NULL;
176 }
177 
178 static ssize_t ioctlmask_show(struct device *dev,
179 			      struct device_attribute *attr,
180 			      char *buf)
181 {
182 	int i, rc;
183 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
184 
185 	if (mutex_lock_interruptible(&ap_perms_mutex))
186 		return -ERESTARTSYS;
187 
188 	buf[0] = '0';
189 	buf[1] = 'x';
190 	for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
191 		snprintf(buf + 2 + 2 * i * sizeof(long),
192 			 PAGE_SIZE - 2 - 2 * i * sizeof(long),
193 			 "%016lx", zcdndev->perms.ioctlm[i]);
194 	buf[2 + 2 * i * sizeof(long)] = '\n';
195 	buf[2 + 2 * i * sizeof(long) + 1] = '\0';
196 	rc = 2 + 2 * i * sizeof(long) + 1;
197 
198 	mutex_unlock(&ap_perms_mutex);
199 
200 	return rc;
201 }
202 
203 static ssize_t ioctlmask_store(struct device *dev,
204 			       struct device_attribute *attr,
205 			       const char *buf, size_t count)
206 {
207 	int rc;
208 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
209 
210 	rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
211 			       AP_IOCTLS, &ap_perms_mutex);
212 	if (rc)
213 		return rc;
214 
215 	return count;
216 }
217 
218 static DEVICE_ATTR_RW(ioctlmask);
219 
220 static ssize_t apmask_show(struct device *dev,
221 			   struct device_attribute *attr,
222 			   char *buf)
223 {
224 	int i, rc;
225 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
226 
227 	if (mutex_lock_interruptible(&ap_perms_mutex))
228 		return -ERESTARTSYS;
229 
230 	buf[0] = '0';
231 	buf[1] = 'x';
232 	for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
233 		snprintf(buf + 2 + 2 * i * sizeof(long),
234 			 PAGE_SIZE - 2 - 2 * i * sizeof(long),
235 			 "%016lx", zcdndev->perms.apm[i]);
236 	buf[2 + 2 * i * sizeof(long)] = '\n';
237 	buf[2 + 2 * i * sizeof(long) + 1] = '\0';
238 	rc = 2 + 2 * i * sizeof(long) + 1;
239 
240 	mutex_unlock(&ap_perms_mutex);
241 
242 	return rc;
243 }
244 
245 static ssize_t apmask_store(struct device *dev,
246 			    struct device_attribute *attr,
247 			    const char *buf, size_t count)
248 {
249 	int rc;
250 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
251 
252 	rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
253 			       AP_DEVICES, &ap_perms_mutex);
254 	if (rc)
255 		return rc;
256 
257 	return count;
258 }
259 
260 static DEVICE_ATTR_RW(apmask);
261 
262 static ssize_t aqmask_show(struct device *dev,
263 			   struct device_attribute *attr,
264 			   char *buf)
265 {
266 	int i, rc;
267 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
268 
269 	if (mutex_lock_interruptible(&ap_perms_mutex))
270 		return -ERESTARTSYS;
271 
272 	buf[0] = '0';
273 	buf[1] = 'x';
274 	for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
275 		snprintf(buf + 2 + 2 * i * sizeof(long),
276 			 PAGE_SIZE - 2 - 2 * i * sizeof(long),
277 			 "%016lx", zcdndev->perms.aqm[i]);
278 	buf[2 + 2 * i * sizeof(long)] = '\n';
279 	buf[2 + 2 * i * sizeof(long) + 1] = '\0';
280 	rc = 2 + 2 * i * sizeof(long) + 1;
281 
282 	mutex_unlock(&ap_perms_mutex);
283 
284 	return rc;
285 }
286 
287 static ssize_t aqmask_store(struct device *dev,
288 			    struct device_attribute *attr,
289 			    const char *buf, size_t count)
290 {
291 	int rc;
292 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
293 
294 	rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
295 			       AP_DOMAINS, &ap_perms_mutex);
296 	if (rc)
297 		return rc;
298 
299 	return count;
300 }
301 
302 static DEVICE_ATTR_RW(aqmask);
303 
304 static struct attribute *zcdn_dev_attrs[] = {
305 	&dev_attr_ioctlmask.attr,
306 	&dev_attr_apmask.attr,
307 	&dev_attr_aqmask.attr,
308 	NULL
309 };
310 
311 static struct attribute_group zcdn_dev_attr_group = {
312 	.attrs = zcdn_dev_attrs
313 };
314 
315 static const struct attribute_group *zcdn_dev_attr_groups[] = {
316 	&zcdn_dev_attr_group,
317 	NULL
318 };
319 
320 static ssize_t zcdn_create_store(struct class *class,
321 				 struct class_attribute *attr,
322 				 const char *buf, size_t count)
323 {
324 	int rc;
325 	char name[ZCDN_MAX_NAME];
326 
327 	strncpy(name, skip_spaces(buf), sizeof(name));
328 	name[sizeof(name) - 1] = '\0';
329 
330 	rc = zcdn_create(strim(name));
331 
332 	return rc ? rc : count;
333 }
334 
335 static const struct class_attribute class_attr_zcdn_create =
336 	__ATTR(create, 0600, NULL, zcdn_create_store);
337 
338 static ssize_t zcdn_destroy_store(struct class *class,
339 				  struct class_attribute *attr,
340 				  const char *buf, size_t count)
341 {
342 	int rc;
343 	char name[ZCDN_MAX_NAME];
344 
345 	strncpy(name, skip_spaces(buf), sizeof(name));
346 	name[sizeof(name) - 1] = '\0';
347 
348 	rc = zcdn_destroy(strim(name));
349 
350 	return rc ? rc : count;
351 }
352 
353 static const struct class_attribute class_attr_zcdn_destroy =
354 	__ATTR(destroy, 0600, NULL, zcdn_destroy_store);
355 
356 static void zcdn_device_release(struct device *dev)
357 {
358 	struct zcdn_device *zcdndev = to_zcdn_dev(dev);
359 
360 	ZCRYPT_DBF(DBF_INFO, "releasing zcdn device %d:%d\n",
361 		   MAJOR(dev->devt), MINOR(dev->devt));
362 
363 	kfree(zcdndev);
364 }
365 
366 static int zcdn_create(const char *name)
367 {
368 	dev_t devt;
369 	int i, rc = 0;
370 	char nodename[ZCDN_MAX_NAME];
371 	struct zcdn_device *zcdndev;
372 
373 	if (mutex_lock_interruptible(&ap_perms_mutex))
374 		return -ERESTARTSYS;
375 
376 	/* check if device node with this name already exists */
377 	if (name[0]) {
378 		zcdndev = find_zcdndev_by_name(name);
379 		if (zcdndev) {
380 			put_device(&zcdndev->device);
381 			rc = -EEXIST;
382 			goto unlockout;
383 		}
384 	}
385 
386 	/* find an unused minor number */
387 	for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
388 		devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
389 		zcdndev = find_zcdndev_by_devt(devt);
390 		if (zcdndev)
391 			put_device(&zcdndev->device);
392 		else
393 			break;
394 	}
395 	if (i == ZCRYPT_MAX_MINOR_NODES) {
396 		rc = -ENOSPC;
397 		goto unlockout;
398 	}
399 
400 	/* alloc and prepare a new zcdn device */
401 	zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
402 	if (!zcdndev) {
403 		rc = -ENOMEM;
404 		goto unlockout;
405 	}
406 	zcdndev->device.release = zcdn_device_release;
407 	zcdndev->device.class = zcrypt_class;
408 	zcdndev->device.devt = devt;
409 	zcdndev->device.groups = zcdn_dev_attr_groups;
410 	if (name[0])
411 		strncpy(nodename, name, sizeof(nodename));
412 	else
413 		snprintf(nodename, sizeof(nodename),
414 			 ZCRYPT_NAME "_%d", (int) MINOR(devt));
415 	nodename[sizeof(nodename)-1] = '\0';
416 	if (dev_set_name(&zcdndev->device, nodename)) {
417 		rc = -EINVAL;
418 		goto unlockout;
419 	}
420 	rc = device_register(&zcdndev->device);
421 	if (rc) {
422 		put_device(&zcdndev->device);
423 		goto unlockout;
424 	}
425 
426 	ZCRYPT_DBF(DBF_INFO, "created zcdn device %d:%d\n",
427 		   MAJOR(devt), MINOR(devt));
428 
429 unlockout:
430 	mutex_unlock(&ap_perms_mutex);
431 	return rc;
432 }
433 
434 static int zcdn_destroy(const char *name)
435 {
436 	int rc = 0;
437 	struct zcdn_device *zcdndev;
438 
439 	if (mutex_lock_interruptible(&ap_perms_mutex))
440 		return -ERESTARTSYS;
441 
442 	/* try to find this zcdn device */
443 	zcdndev = find_zcdndev_by_name(name);
444 	if (!zcdndev) {
445 		rc = -ENOENT;
446 		goto unlockout;
447 	}
448 
449 	/*
450 	 * The zcdn device is not hard destroyed. It is subject to
451 	 * reference counting and thus just needs to be unregistered.
452 	 */
453 	put_device(&zcdndev->device);
454 	device_unregister(&zcdndev->device);
455 
456 unlockout:
457 	mutex_unlock(&ap_perms_mutex);
458 	return rc;
459 }
460 
461 static void zcdn_destroy_all(void)
462 {
463 	int i;
464 	dev_t devt;
465 	struct zcdn_device *zcdndev;
466 
467 	mutex_lock(&ap_perms_mutex);
468 	for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
469 		devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
470 		zcdndev = find_zcdndev_by_devt(devt);
471 		if (zcdndev) {
472 			put_device(&zcdndev->device);
473 			device_unregister(&zcdndev->device);
474 		}
475 	}
476 	mutex_unlock(&ap_perms_mutex);
477 }
478 
479 #endif
480 
481 /**
482  * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
483  *
484  * This function is not supported beyond zcrypt 1.3.1.
485  */
486 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
487 			   size_t count, loff_t *f_pos)
488 {
489 	return -EPERM;
490 }
491 
492 /**
493  * zcrypt_write(): Not allowed.
494  *
495  * Write is is not allowed
496  */
497 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
498 			    size_t count, loff_t *f_pos)
499 {
500 	return -EPERM;
501 }
502 
503 /**
504  * zcrypt_open(): Count number of users.
505  *
506  * Device open function to count number of users.
507  */
508 static int zcrypt_open(struct inode *inode, struct file *filp)
509 {
510 	struct ap_perms *perms = &ap_perms;
511 
512 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
513 	if (filp->f_inode->i_cdev == &zcrypt_cdev) {
514 		struct zcdn_device *zcdndev;
515 
516 		if (mutex_lock_interruptible(&ap_perms_mutex))
517 			return -ERESTARTSYS;
518 		zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
519 		/* find returns a reference, no get_device() needed */
520 		mutex_unlock(&ap_perms_mutex);
521 		if (zcdndev)
522 			perms = &zcdndev->perms;
523 	}
524 #endif
525 	filp->private_data = (void *) perms;
526 
527 	atomic_inc(&zcrypt_open_count);
528 	return stream_open(inode, filp);
529 }
530 
531 /**
532  * zcrypt_release(): Count number of users.
533  *
534  * Device close function to count number of users.
535  */
536 static int zcrypt_release(struct inode *inode, struct file *filp)
537 {
538 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
539 	if (filp->f_inode->i_cdev == &zcrypt_cdev) {
540 		struct zcdn_device *zcdndev;
541 
542 		if (mutex_lock_interruptible(&ap_perms_mutex))
543 			return -ERESTARTSYS;
544 		zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
545 		mutex_unlock(&ap_perms_mutex);
546 		if (zcdndev) {
547 			/* 2 puts here: one for find, one for open */
548 			put_device(&zcdndev->device);
549 			put_device(&zcdndev->device);
550 		}
551 	}
552 #endif
553 
554 	atomic_dec(&zcrypt_open_count);
555 	return 0;
556 }
557 
558 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
559 				     unsigned int cmd)
560 {
561 	int rc = -EPERM;
562 	int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
563 
564 	if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
565 		if (test_bit_inv(ioctlnr, perms->ioctlm))
566 			rc = 0;
567 	}
568 
569 	if (rc)
570 		ZCRYPT_DBF(DBF_WARN,
571 			   "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
572 			   ioctlnr, rc);
573 
574 	return rc;
575 }
576 
577 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
578 {
579 	return test_bit_inv(card, perms->apm) ? true : false;
580 }
581 
582 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
583 {
584 	return test_bit_inv(queue, perms->aqm) ? true : false;
585 }
586 
587 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
588 						     struct zcrypt_queue *zq,
589 						     struct module **pmod,
590 						     unsigned int weight)
591 {
592 	if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
593 		return NULL;
594 	zcrypt_queue_get(zq);
595 	get_device(&zq->queue->ap_dev.device);
596 	atomic_add(weight, &zc->load);
597 	atomic_add(weight, &zq->load);
598 	zq->request_count++;
599 	*pmod = zq->queue->ap_dev.drv->driver.owner;
600 	return zq;
601 }
602 
603 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
604 				     struct zcrypt_queue *zq,
605 				     struct module *mod,
606 				     unsigned int weight)
607 {
608 	zq->request_count--;
609 	atomic_sub(weight, &zc->load);
610 	atomic_sub(weight, &zq->load);
611 	put_device(&zq->queue->ap_dev.device);
612 	zcrypt_queue_put(zq);
613 	module_put(mod);
614 }
615 
616 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
617 				       struct zcrypt_card *pref_zc,
618 				       unsigned int weight,
619 				       unsigned int pref_weight)
620 {
621 	if (!pref_zc)
622 		return false;
623 	weight += atomic_read(&zc->load);
624 	pref_weight += atomic_read(&pref_zc->load);
625 	if (weight == pref_weight)
626 		return atomic_read(&zc->card->total_request_count) >
627 			atomic_read(&pref_zc->card->total_request_count);
628 	return weight > pref_weight;
629 }
630 
631 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
632 					struct zcrypt_queue *pref_zq,
633 					unsigned int weight,
634 					unsigned int pref_weight)
635 {
636 	if (!pref_zq)
637 		return false;
638 	weight += atomic_read(&zq->load);
639 	pref_weight += atomic_read(&pref_zq->load);
640 	if (weight == pref_weight)
641 		return zq->queue->total_request_count >
642 			pref_zq->queue->total_request_count;
643 	return weight > pref_weight;
644 }
645 
646 /*
647  * zcrypt ioctls.
648  */
649 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
650 			       struct ica_rsa_modexpo *mex)
651 {
652 	struct zcrypt_card *zc, *pref_zc;
653 	struct zcrypt_queue *zq, *pref_zq;
654 	unsigned int weight, pref_weight;
655 	unsigned int func_code;
656 	int qid = 0, rc = -ENODEV;
657 	struct module *mod;
658 
659 	trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
660 
661 	if (mex->outputdatalength < mex->inputdatalength) {
662 		func_code = 0;
663 		rc = -EINVAL;
664 		goto out;
665 	}
666 
667 	/*
668 	 * As long as outputdatalength is big enough, we can set the
669 	 * outputdatalength equal to the inputdatalength, since that is the
670 	 * number of bytes we will copy in any case
671 	 */
672 	mex->outputdatalength = mex->inputdatalength;
673 
674 	rc = get_rsa_modex_fc(mex, &func_code);
675 	if (rc)
676 		goto out;
677 
678 	pref_zc = NULL;
679 	pref_zq = NULL;
680 	spin_lock(&zcrypt_list_lock);
681 	for_each_zcrypt_card(zc) {
682 		/* Check for online accelarator and CCA cards */
683 		if (!zc->online || !(zc->card->functions & 0x18000000))
684 			continue;
685 		/* Check for size limits */
686 		if (zc->min_mod_size > mex->inputdatalength ||
687 		    zc->max_mod_size < mex->inputdatalength)
688 			continue;
689 		/* check if device node has admission for this card */
690 		if (!zcrypt_check_card(perms, zc->card->id))
691 			continue;
692 		/* get weight index of the card device	*/
693 		weight = zc->speed_rating[func_code];
694 		if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
695 			continue;
696 		for_each_zcrypt_queue(zq, zc) {
697 			/* check if device is online and eligible */
698 			if (!zq->online || !zq->ops->rsa_modexpo)
699 				continue;
700 			/* check if device node has admission for this queue */
701 			if (!zcrypt_check_queue(perms,
702 						AP_QID_QUEUE(zq->queue->qid)))
703 				continue;
704 			if (zcrypt_queue_compare(zq, pref_zq,
705 						 weight, pref_weight))
706 				continue;
707 			pref_zc = zc;
708 			pref_zq = zq;
709 			pref_weight = weight;
710 		}
711 	}
712 	pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
713 	spin_unlock(&zcrypt_list_lock);
714 
715 	if (!pref_zq) {
716 		rc = -ENODEV;
717 		goto out;
718 	}
719 
720 	qid = pref_zq->queue->qid;
721 	rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
722 
723 	spin_lock(&zcrypt_list_lock);
724 	zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
725 	spin_unlock(&zcrypt_list_lock);
726 
727 out:
728 	trace_s390_zcrypt_rep(mex, func_code, rc,
729 			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
730 	return rc;
731 }
732 
733 static long zcrypt_rsa_crt(struct ap_perms *perms,
734 			   struct ica_rsa_modexpo_crt *crt)
735 {
736 	struct zcrypt_card *zc, *pref_zc;
737 	struct zcrypt_queue *zq, *pref_zq;
738 	unsigned int weight, pref_weight;
739 	unsigned int func_code;
740 	int qid = 0, rc = -ENODEV;
741 	struct module *mod;
742 
743 	trace_s390_zcrypt_req(crt, TP_ICARSACRT);
744 
745 	if (crt->outputdatalength < crt->inputdatalength) {
746 		func_code = 0;
747 		rc = -EINVAL;
748 		goto out;
749 	}
750 
751 	/*
752 	 * As long as outputdatalength is big enough, we can set the
753 	 * outputdatalength equal to the inputdatalength, since that is the
754 	 * number of bytes we will copy in any case
755 	 */
756 	crt->outputdatalength = crt->inputdatalength;
757 
758 	rc = get_rsa_crt_fc(crt, &func_code);
759 	if (rc)
760 		goto out;
761 
762 	pref_zc = NULL;
763 	pref_zq = NULL;
764 	spin_lock(&zcrypt_list_lock);
765 	for_each_zcrypt_card(zc) {
766 		/* Check for online accelarator and CCA cards */
767 		if (!zc->online || !(zc->card->functions & 0x18000000))
768 			continue;
769 		/* Check for size limits */
770 		if (zc->min_mod_size > crt->inputdatalength ||
771 		    zc->max_mod_size < crt->inputdatalength)
772 			continue;
773 		/* check if device node has admission for this card */
774 		if (!zcrypt_check_card(perms, zc->card->id))
775 			continue;
776 		/* get weight index of the card device	*/
777 		weight = zc->speed_rating[func_code];
778 		if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
779 			continue;
780 		for_each_zcrypt_queue(zq, zc) {
781 			/* check if device is online and eligible */
782 			if (!zq->online || !zq->ops->rsa_modexpo_crt)
783 				continue;
784 			/* check if device node has admission for this queue */
785 			if (!zcrypt_check_queue(perms,
786 						AP_QID_QUEUE(zq->queue->qid)))
787 				continue;
788 			if (zcrypt_queue_compare(zq, pref_zq,
789 						 weight, pref_weight))
790 				continue;
791 			pref_zc = zc;
792 			pref_zq = zq;
793 			pref_weight = weight;
794 		}
795 	}
796 	pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
797 	spin_unlock(&zcrypt_list_lock);
798 
799 	if (!pref_zq) {
800 		rc = -ENODEV;
801 		goto out;
802 	}
803 
804 	qid = pref_zq->queue->qid;
805 	rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
806 
807 	spin_lock(&zcrypt_list_lock);
808 	zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
809 	spin_unlock(&zcrypt_list_lock);
810 
811 out:
812 	trace_s390_zcrypt_rep(crt, func_code, rc,
813 			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
814 	return rc;
815 }
816 
817 static long _zcrypt_send_cprb(struct ap_perms *perms,
818 			      struct ica_xcRB *xcRB)
819 {
820 	struct zcrypt_card *zc, *pref_zc;
821 	struct zcrypt_queue *zq, *pref_zq;
822 	struct ap_message ap_msg;
823 	unsigned int weight, pref_weight;
824 	unsigned int func_code;
825 	unsigned short *domain;
826 	int qid = 0, rc = -ENODEV;
827 	struct module *mod;
828 
829 	trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
830 
831 	xcRB->status = 0;
832 	ap_init_message(&ap_msg);
833 	rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
834 	if (rc)
835 		goto out;
836 
837 	pref_zc = NULL;
838 	pref_zq = NULL;
839 	spin_lock(&zcrypt_list_lock);
840 	for_each_zcrypt_card(zc) {
841 		/* Check for online CCA cards */
842 		if (!zc->online || !(zc->card->functions & 0x10000000))
843 			continue;
844 		/* Check for user selected CCA card */
845 		if (xcRB->user_defined != AUTOSELECT &&
846 		    xcRB->user_defined != zc->card->id)
847 			continue;
848 		/* check if device node has admission for this card */
849 		if (!zcrypt_check_card(perms, zc->card->id))
850 			continue;
851 		/* get weight index of the card device	*/
852 		weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
853 		if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
854 			continue;
855 		for_each_zcrypt_queue(zq, zc) {
856 			/* check if device is online and eligible */
857 			if (!zq->online ||
858 			    !zq->ops->send_cprb ||
859 			    ((*domain != (unsigned short) AUTOSELECT) &&
860 			     (*domain != AP_QID_QUEUE(zq->queue->qid))))
861 				continue;
862 			/* check if device node has admission for this queue */
863 			if (!zcrypt_check_queue(perms,
864 						AP_QID_QUEUE(zq->queue->qid)))
865 				continue;
866 			if (zcrypt_queue_compare(zq, pref_zq,
867 						 weight, pref_weight))
868 				continue;
869 			pref_zc = zc;
870 			pref_zq = zq;
871 			pref_weight = weight;
872 		}
873 	}
874 	pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
875 	spin_unlock(&zcrypt_list_lock);
876 
877 	if (!pref_zq) {
878 		rc = -ENODEV;
879 		goto out;
880 	}
881 
882 	/* in case of auto select, provide the correct domain */
883 	qid = pref_zq->queue->qid;
884 	if (*domain == (unsigned short) AUTOSELECT)
885 		*domain = AP_QID_QUEUE(qid);
886 
887 	rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
888 
889 	spin_lock(&zcrypt_list_lock);
890 	zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
891 	spin_unlock(&zcrypt_list_lock);
892 
893 out:
894 	ap_release_message(&ap_msg);
895 	trace_s390_zcrypt_rep(xcRB, func_code, rc,
896 			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
897 	return rc;
898 }
899 
900 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
901 {
902 	return _zcrypt_send_cprb(&ap_perms, xcRB);
903 }
904 EXPORT_SYMBOL(zcrypt_send_cprb);
905 
906 static bool is_desired_ep11_card(unsigned int dev_id,
907 				 unsigned short target_num,
908 				 struct ep11_target_dev *targets)
909 {
910 	while (target_num-- > 0) {
911 		if (dev_id == targets->ap_id)
912 			return true;
913 		targets++;
914 	}
915 	return false;
916 }
917 
918 static bool is_desired_ep11_queue(unsigned int dev_qid,
919 				  unsigned short target_num,
920 				  struct ep11_target_dev *targets)
921 {
922 	while (target_num-- > 0) {
923 		if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
924 			return true;
925 		targets++;
926 	}
927 	return false;
928 }
929 
930 static long zcrypt_send_ep11_cprb(struct ap_perms *perms,
931 				  struct ep11_urb *xcrb)
932 {
933 	struct zcrypt_card *zc, *pref_zc;
934 	struct zcrypt_queue *zq, *pref_zq;
935 	struct ep11_target_dev *targets;
936 	unsigned short target_num;
937 	unsigned int weight, pref_weight;
938 	unsigned int func_code;
939 	struct ap_message ap_msg;
940 	int qid = 0, rc = -ENODEV;
941 	struct module *mod;
942 
943 	trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
944 
945 	ap_init_message(&ap_msg);
946 
947 	target_num = (unsigned short) xcrb->targets_num;
948 
949 	/* empty list indicates autoselect (all available targets) */
950 	targets = NULL;
951 	if (target_num != 0) {
952 		struct ep11_target_dev __user *uptr;
953 
954 		targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
955 		if (!targets) {
956 			func_code = 0;
957 			rc = -ENOMEM;
958 			goto out;
959 		}
960 
961 		uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
962 		if (copy_from_user(targets, uptr,
963 				   target_num * sizeof(*targets))) {
964 			func_code = 0;
965 			rc = -EFAULT;
966 			goto out_free;
967 		}
968 	}
969 
970 	rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
971 	if (rc)
972 		goto out_free;
973 
974 	pref_zc = NULL;
975 	pref_zq = NULL;
976 	spin_lock(&zcrypt_list_lock);
977 	for_each_zcrypt_card(zc) {
978 		/* Check for online EP11 cards */
979 		if (!zc->online || !(zc->card->functions & 0x04000000))
980 			continue;
981 		/* Check for user selected EP11 card */
982 		if (targets &&
983 		    !is_desired_ep11_card(zc->card->id, target_num, targets))
984 			continue;
985 		/* check if device node has admission for this card */
986 		if (!zcrypt_check_card(perms, zc->card->id))
987 			continue;
988 		/* get weight index of the card device	*/
989 		weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
990 		if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
991 			continue;
992 		for_each_zcrypt_queue(zq, zc) {
993 			/* check if device is online and eligible */
994 			if (!zq->online ||
995 			    !zq->ops->send_ep11_cprb ||
996 			    (targets &&
997 			     !is_desired_ep11_queue(zq->queue->qid,
998 						    target_num, targets)))
999 				continue;
1000 			/* check if device node has admission for this queue */
1001 			if (!zcrypt_check_queue(perms,
1002 						AP_QID_QUEUE(zq->queue->qid)))
1003 				continue;
1004 			if (zcrypt_queue_compare(zq, pref_zq,
1005 						 weight, pref_weight))
1006 				continue;
1007 			pref_zc = zc;
1008 			pref_zq = zq;
1009 			pref_weight = weight;
1010 		}
1011 	}
1012 	pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1013 	spin_unlock(&zcrypt_list_lock);
1014 
1015 	if (!pref_zq) {
1016 		rc = -ENODEV;
1017 		goto out_free;
1018 	}
1019 
1020 	qid = pref_zq->queue->qid;
1021 	rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
1022 
1023 	spin_lock(&zcrypt_list_lock);
1024 	zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1025 	spin_unlock(&zcrypt_list_lock);
1026 
1027 out_free:
1028 	kfree(targets);
1029 out:
1030 	ap_release_message(&ap_msg);
1031 	trace_s390_zcrypt_rep(xcrb, func_code, rc,
1032 			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1033 	return rc;
1034 }
1035 
1036 static long zcrypt_rng(char *buffer)
1037 {
1038 	struct zcrypt_card *zc, *pref_zc;
1039 	struct zcrypt_queue *zq, *pref_zq;
1040 	unsigned int weight, pref_weight;
1041 	unsigned int func_code;
1042 	struct ap_message ap_msg;
1043 	unsigned int domain;
1044 	int qid = 0, rc = -ENODEV;
1045 	struct module *mod;
1046 
1047 	trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1048 
1049 	ap_init_message(&ap_msg);
1050 	rc = get_rng_fc(&ap_msg, &func_code, &domain);
1051 	if (rc)
1052 		goto out;
1053 
1054 	pref_zc = NULL;
1055 	pref_zq = NULL;
1056 	spin_lock(&zcrypt_list_lock);
1057 	for_each_zcrypt_card(zc) {
1058 		/* Check for online CCA cards */
1059 		if (!zc->online || !(zc->card->functions & 0x10000000))
1060 			continue;
1061 		/* get weight index of the card device	*/
1062 		weight = zc->speed_rating[func_code];
1063 		if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1064 			continue;
1065 		for_each_zcrypt_queue(zq, zc) {
1066 			/* check if device is online and eligible */
1067 			if (!zq->online || !zq->ops->rng)
1068 				continue;
1069 			if (zcrypt_queue_compare(zq, pref_zq,
1070 						 weight, pref_weight))
1071 				continue;
1072 			pref_zc = zc;
1073 			pref_zq = zq;
1074 			pref_weight = weight;
1075 		}
1076 	}
1077 	pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1078 	spin_unlock(&zcrypt_list_lock);
1079 
1080 	if (!pref_zq) {
1081 		rc = -ENODEV;
1082 		goto out;
1083 	}
1084 
1085 	qid = pref_zq->queue->qid;
1086 	rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1087 
1088 	spin_lock(&zcrypt_list_lock);
1089 	zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1090 	spin_unlock(&zcrypt_list_lock);
1091 
1092 out:
1093 	ap_release_message(&ap_msg);
1094 	trace_s390_zcrypt_rep(buffer, func_code, rc,
1095 			      AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1096 	return rc;
1097 }
1098 
1099 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1100 {
1101 	struct zcrypt_card *zc;
1102 	struct zcrypt_queue *zq;
1103 	struct zcrypt_device_status *stat;
1104 	int card, queue;
1105 
1106 	memset(devstatus, 0, MAX_ZDEV_ENTRIES
1107 	       * sizeof(struct zcrypt_device_status));
1108 
1109 	spin_lock(&zcrypt_list_lock);
1110 	for_each_zcrypt_card(zc) {
1111 		for_each_zcrypt_queue(zq, zc) {
1112 			card = AP_QID_CARD(zq->queue->qid);
1113 			if (card >= MAX_ZDEV_CARDIDS)
1114 				continue;
1115 			queue = AP_QID_QUEUE(zq->queue->qid);
1116 			stat = &devstatus[card * AP_DOMAINS + queue];
1117 			stat->hwtype = zc->card->ap_dev.device_type;
1118 			stat->functions = zc->card->functions >> 26;
1119 			stat->qid = zq->queue->qid;
1120 			stat->online = zq->online ? 0x01 : 0x00;
1121 		}
1122 	}
1123 	spin_unlock(&zcrypt_list_lock);
1124 }
1125 
1126 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1127 {
1128 	struct zcrypt_card *zc;
1129 	struct zcrypt_queue *zq;
1130 	struct zcrypt_device_status_ext *stat;
1131 	int card, queue;
1132 
1133 	memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1134 	       * sizeof(struct zcrypt_device_status_ext));
1135 
1136 	spin_lock(&zcrypt_list_lock);
1137 	for_each_zcrypt_card(zc) {
1138 		for_each_zcrypt_queue(zq, zc) {
1139 			card = AP_QID_CARD(zq->queue->qid);
1140 			queue = AP_QID_QUEUE(zq->queue->qid);
1141 			stat = &devstatus[card * AP_DOMAINS + queue];
1142 			stat->hwtype = zc->card->ap_dev.device_type;
1143 			stat->functions = zc->card->functions >> 26;
1144 			stat->qid = zq->queue->qid;
1145 			stat->online = zq->online ? 0x01 : 0x00;
1146 		}
1147 	}
1148 	spin_unlock(&zcrypt_list_lock);
1149 }
1150 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1151 
1152 static void zcrypt_status_mask(char status[], size_t max_adapters)
1153 {
1154 	struct zcrypt_card *zc;
1155 	struct zcrypt_queue *zq;
1156 	int card;
1157 
1158 	memset(status, 0, max_adapters);
1159 	spin_lock(&zcrypt_list_lock);
1160 	for_each_zcrypt_card(zc) {
1161 		for_each_zcrypt_queue(zq, zc) {
1162 			card = AP_QID_CARD(zq->queue->qid);
1163 			if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1164 			    || card >= max_adapters)
1165 				continue;
1166 			status[card] = zc->online ? zc->user_space_type : 0x0d;
1167 		}
1168 	}
1169 	spin_unlock(&zcrypt_list_lock);
1170 }
1171 
1172 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1173 {
1174 	struct zcrypt_card *zc;
1175 	struct zcrypt_queue *zq;
1176 	int card;
1177 
1178 	memset(qdepth, 0, max_adapters);
1179 	spin_lock(&zcrypt_list_lock);
1180 	local_bh_disable();
1181 	for_each_zcrypt_card(zc) {
1182 		for_each_zcrypt_queue(zq, zc) {
1183 			card = AP_QID_CARD(zq->queue->qid);
1184 			if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1185 			    || card >= max_adapters)
1186 				continue;
1187 			spin_lock(&zq->queue->lock);
1188 			qdepth[card] =
1189 				zq->queue->pendingq_count +
1190 				zq->queue->requestq_count;
1191 			spin_unlock(&zq->queue->lock);
1192 		}
1193 	}
1194 	local_bh_enable();
1195 	spin_unlock(&zcrypt_list_lock);
1196 }
1197 
1198 static void zcrypt_perdev_reqcnt(int reqcnt[], size_t max_adapters)
1199 {
1200 	struct zcrypt_card *zc;
1201 	struct zcrypt_queue *zq;
1202 	int card;
1203 
1204 	memset(reqcnt, 0, sizeof(int) * max_adapters);
1205 	spin_lock(&zcrypt_list_lock);
1206 	local_bh_disable();
1207 	for_each_zcrypt_card(zc) {
1208 		for_each_zcrypt_queue(zq, zc) {
1209 			card = AP_QID_CARD(zq->queue->qid);
1210 			if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1211 			    || card >= max_adapters)
1212 				continue;
1213 			spin_lock(&zq->queue->lock);
1214 			reqcnt[card] = zq->queue->total_request_count;
1215 			spin_unlock(&zq->queue->lock);
1216 		}
1217 	}
1218 	local_bh_enable();
1219 	spin_unlock(&zcrypt_list_lock);
1220 }
1221 
1222 static int zcrypt_pendingq_count(void)
1223 {
1224 	struct zcrypt_card *zc;
1225 	struct zcrypt_queue *zq;
1226 	int pendingq_count;
1227 
1228 	pendingq_count = 0;
1229 	spin_lock(&zcrypt_list_lock);
1230 	local_bh_disable();
1231 	for_each_zcrypt_card(zc) {
1232 		for_each_zcrypt_queue(zq, zc) {
1233 			if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1234 				continue;
1235 			spin_lock(&zq->queue->lock);
1236 			pendingq_count += zq->queue->pendingq_count;
1237 			spin_unlock(&zq->queue->lock);
1238 		}
1239 	}
1240 	local_bh_enable();
1241 	spin_unlock(&zcrypt_list_lock);
1242 	return pendingq_count;
1243 }
1244 
1245 static int zcrypt_requestq_count(void)
1246 {
1247 	struct zcrypt_card *zc;
1248 	struct zcrypt_queue *zq;
1249 	int requestq_count;
1250 
1251 	requestq_count = 0;
1252 	spin_lock(&zcrypt_list_lock);
1253 	local_bh_disable();
1254 	for_each_zcrypt_card(zc) {
1255 		for_each_zcrypt_queue(zq, zc) {
1256 			if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1257 				continue;
1258 			spin_lock(&zq->queue->lock);
1259 			requestq_count += zq->queue->requestq_count;
1260 			spin_unlock(&zq->queue->lock);
1261 		}
1262 	}
1263 	local_bh_enable();
1264 	spin_unlock(&zcrypt_list_lock);
1265 	return requestq_count;
1266 }
1267 
1268 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1269 				  unsigned long arg)
1270 {
1271 	int rc;
1272 	struct ap_perms *perms =
1273 		(struct ap_perms *) filp->private_data;
1274 
1275 	rc = zcrypt_check_ioctl(perms, cmd);
1276 	if (rc)
1277 		return rc;
1278 
1279 	switch (cmd) {
1280 	case ICARSAMODEXPO: {
1281 		struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1282 		struct ica_rsa_modexpo mex;
1283 
1284 		if (copy_from_user(&mex, umex, sizeof(mex)))
1285 			return -EFAULT;
1286 		do {
1287 			rc = zcrypt_rsa_modexpo(perms, &mex);
1288 		} while (rc == -EAGAIN);
1289 		/* on failure: retry once again after a requested rescan */
1290 		if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1291 			do {
1292 				rc = zcrypt_rsa_modexpo(perms, &mex);
1293 			} while (rc == -EAGAIN);
1294 		if (rc) {
1295 			ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1296 			return rc;
1297 		}
1298 		return put_user(mex.outputdatalength, &umex->outputdatalength);
1299 	}
1300 	case ICARSACRT: {
1301 		struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1302 		struct ica_rsa_modexpo_crt crt;
1303 
1304 		if (copy_from_user(&crt, ucrt, sizeof(crt)))
1305 			return -EFAULT;
1306 		do {
1307 			rc = zcrypt_rsa_crt(perms, &crt);
1308 		} while (rc == -EAGAIN);
1309 		/* on failure: retry once again after a requested rescan */
1310 		if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1311 			do {
1312 				rc = zcrypt_rsa_crt(perms, &crt);
1313 			} while (rc == -EAGAIN);
1314 		if (rc) {
1315 			ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1316 			return rc;
1317 		}
1318 		return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1319 	}
1320 	case ZSECSENDCPRB: {
1321 		struct ica_xcRB __user *uxcRB = (void __user *) arg;
1322 		struct ica_xcRB xcRB;
1323 
1324 		if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1325 			return -EFAULT;
1326 		do {
1327 			rc = _zcrypt_send_cprb(perms, &xcRB);
1328 		} while (rc == -EAGAIN);
1329 		/* on failure: retry once again after a requested rescan */
1330 		if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1331 			do {
1332 				rc = _zcrypt_send_cprb(perms, &xcRB);
1333 			} while (rc == -EAGAIN);
1334 		if (rc)
1335 			ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1336 				   rc, xcRB.status);
1337 		if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1338 			return -EFAULT;
1339 		return rc;
1340 	}
1341 	case ZSENDEP11CPRB: {
1342 		struct ep11_urb __user *uxcrb = (void __user *)arg;
1343 		struct ep11_urb xcrb;
1344 
1345 		if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1346 			return -EFAULT;
1347 		do {
1348 			rc = zcrypt_send_ep11_cprb(perms, &xcrb);
1349 		} while (rc == -EAGAIN);
1350 		/* on failure: retry once again after a requested rescan */
1351 		if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1352 			do {
1353 				rc = zcrypt_send_ep11_cprb(perms, &xcrb);
1354 			} while (rc == -EAGAIN);
1355 		if (rc)
1356 			ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1357 		if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1358 			return -EFAULT;
1359 		return rc;
1360 	}
1361 	case ZCRYPT_DEVICE_STATUS: {
1362 		struct zcrypt_device_status_ext *device_status;
1363 		size_t total_size = MAX_ZDEV_ENTRIES_EXT
1364 			* sizeof(struct zcrypt_device_status_ext);
1365 
1366 		device_status = kzalloc(total_size, GFP_KERNEL);
1367 		if (!device_status)
1368 			return -ENOMEM;
1369 		zcrypt_device_status_mask_ext(device_status);
1370 		if (copy_to_user((char __user *) arg, device_status,
1371 				 total_size))
1372 			rc = -EFAULT;
1373 		kfree(device_status);
1374 		return rc;
1375 	}
1376 	case ZCRYPT_STATUS_MASK: {
1377 		char status[AP_DEVICES];
1378 
1379 		zcrypt_status_mask(status, AP_DEVICES);
1380 		if (copy_to_user((char __user *) arg, status, sizeof(status)))
1381 			return -EFAULT;
1382 		return 0;
1383 	}
1384 	case ZCRYPT_QDEPTH_MASK: {
1385 		char qdepth[AP_DEVICES];
1386 
1387 		zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1388 		if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1389 			return -EFAULT;
1390 		return 0;
1391 	}
1392 	case ZCRYPT_PERDEV_REQCNT: {
1393 		int *reqcnt;
1394 
1395 		reqcnt = kcalloc(AP_DEVICES, sizeof(int), GFP_KERNEL);
1396 		if (!reqcnt)
1397 			return -ENOMEM;
1398 		zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1399 		if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1400 			rc = -EFAULT;
1401 		kfree(reqcnt);
1402 		return rc;
1403 	}
1404 	case Z90STAT_REQUESTQ_COUNT:
1405 		return put_user(zcrypt_requestq_count(), (int __user *) arg);
1406 	case Z90STAT_PENDINGQ_COUNT:
1407 		return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1408 	case Z90STAT_TOTALOPEN_COUNT:
1409 		return put_user(atomic_read(&zcrypt_open_count),
1410 				(int __user *) arg);
1411 	case Z90STAT_DOMAIN_INDEX:
1412 		return put_user(ap_domain_index, (int __user *) arg);
1413 	/*
1414 	 * Deprecated ioctls
1415 	 */
1416 	case ZDEVICESTATUS: {
1417 		/* the old ioctl supports only 64 adapters */
1418 		struct zcrypt_device_status *device_status;
1419 		size_t total_size = MAX_ZDEV_ENTRIES
1420 			* sizeof(struct zcrypt_device_status);
1421 
1422 		device_status = kzalloc(total_size, GFP_KERNEL);
1423 		if (!device_status)
1424 			return -ENOMEM;
1425 		zcrypt_device_status_mask(device_status);
1426 		if (copy_to_user((char __user *) arg, device_status,
1427 				 total_size))
1428 			rc = -EFAULT;
1429 		kfree(device_status);
1430 		return rc;
1431 	}
1432 	case Z90STAT_STATUS_MASK: {
1433 		/* the old ioctl supports only 64 adapters */
1434 		char status[MAX_ZDEV_CARDIDS];
1435 
1436 		zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1437 		if (copy_to_user((char __user *) arg, status, sizeof(status)))
1438 			return -EFAULT;
1439 		return 0;
1440 	}
1441 	case Z90STAT_QDEPTH_MASK: {
1442 		/* the old ioctl supports only 64 adapters */
1443 		char qdepth[MAX_ZDEV_CARDIDS];
1444 
1445 		zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1446 		if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1447 			return -EFAULT;
1448 		return 0;
1449 	}
1450 	case Z90STAT_PERDEV_REQCNT: {
1451 		/* the old ioctl supports only 64 adapters */
1452 		int reqcnt[MAX_ZDEV_CARDIDS];
1453 
1454 		zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1455 		if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1456 			return -EFAULT;
1457 		return 0;
1458 	}
1459 	/* unknown ioctl number */
1460 	default:
1461 		ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1462 		return -ENOIOCTLCMD;
1463 	}
1464 }
1465 
1466 #ifdef CONFIG_COMPAT
1467 /*
1468  * ioctl32 conversion routines
1469  */
1470 struct compat_ica_rsa_modexpo {
1471 	compat_uptr_t	inputdata;
1472 	unsigned int	inputdatalength;
1473 	compat_uptr_t	outputdata;
1474 	unsigned int	outputdatalength;
1475 	compat_uptr_t	b_key;
1476 	compat_uptr_t	n_modulus;
1477 };
1478 
1479 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1480 			    unsigned int cmd, unsigned long arg)
1481 {
1482 	struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1483 	struct compat_ica_rsa_modexpo mex32;
1484 	struct ica_rsa_modexpo mex64;
1485 	long rc;
1486 
1487 	if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1488 		return -EFAULT;
1489 	mex64.inputdata = compat_ptr(mex32.inputdata);
1490 	mex64.inputdatalength = mex32.inputdatalength;
1491 	mex64.outputdata = compat_ptr(mex32.outputdata);
1492 	mex64.outputdatalength = mex32.outputdatalength;
1493 	mex64.b_key = compat_ptr(mex32.b_key);
1494 	mex64.n_modulus = compat_ptr(mex32.n_modulus);
1495 	do {
1496 		rc = zcrypt_rsa_modexpo(perms, &mex64);
1497 	} while (rc == -EAGAIN);
1498 	/* on failure: retry once again after a requested rescan */
1499 	if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1500 		do {
1501 			rc = zcrypt_rsa_modexpo(perms, &mex64);
1502 		} while (rc == -EAGAIN);
1503 	if (rc)
1504 		return rc;
1505 	return put_user(mex64.outputdatalength,
1506 			&umex32->outputdatalength);
1507 }
1508 
1509 struct compat_ica_rsa_modexpo_crt {
1510 	compat_uptr_t	inputdata;
1511 	unsigned int	inputdatalength;
1512 	compat_uptr_t	outputdata;
1513 	unsigned int	outputdatalength;
1514 	compat_uptr_t	bp_key;
1515 	compat_uptr_t	bq_key;
1516 	compat_uptr_t	np_prime;
1517 	compat_uptr_t	nq_prime;
1518 	compat_uptr_t	u_mult_inv;
1519 };
1520 
1521 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1522 				unsigned int cmd, unsigned long arg)
1523 {
1524 	struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1525 	struct compat_ica_rsa_modexpo_crt crt32;
1526 	struct ica_rsa_modexpo_crt crt64;
1527 	long rc;
1528 
1529 	if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1530 		return -EFAULT;
1531 	crt64.inputdata = compat_ptr(crt32.inputdata);
1532 	crt64.inputdatalength = crt32.inputdatalength;
1533 	crt64.outputdata = compat_ptr(crt32.outputdata);
1534 	crt64.outputdatalength = crt32.outputdatalength;
1535 	crt64.bp_key = compat_ptr(crt32.bp_key);
1536 	crt64.bq_key = compat_ptr(crt32.bq_key);
1537 	crt64.np_prime = compat_ptr(crt32.np_prime);
1538 	crt64.nq_prime = compat_ptr(crt32.nq_prime);
1539 	crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1540 	do {
1541 		rc = zcrypt_rsa_crt(perms, &crt64);
1542 	} while (rc == -EAGAIN);
1543 	/* on failure: retry once again after a requested rescan */
1544 	if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1545 		do {
1546 			rc = zcrypt_rsa_crt(perms, &crt64);
1547 		} while (rc == -EAGAIN);
1548 	if (rc)
1549 		return rc;
1550 	return put_user(crt64.outputdatalength,
1551 			&ucrt32->outputdatalength);
1552 }
1553 
1554 struct compat_ica_xcRB {
1555 	unsigned short	agent_ID;
1556 	unsigned int	user_defined;
1557 	unsigned short	request_ID;
1558 	unsigned int	request_control_blk_length;
1559 	unsigned char	padding1[16 - sizeof(compat_uptr_t)];
1560 	compat_uptr_t	request_control_blk_addr;
1561 	unsigned int	request_data_length;
1562 	char		padding2[16 - sizeof(compat_uptr_t)];
1563 	compat_uptr_t	request_data_address;
1564 	unsigned int	reply_control_blk_length;
1565 	char		padding3[16 - sizeof(compat_uptr_t)];
1566 	compat_uptr_t	reply_control_blk_addr;
1567 	unsigned int	reply_data_length;
1568 	char		padding4[16 - sizeof(compat_uptr_t)];
1569 	compat_uptr_t	reply_data_addr;
1570 	unsigned short	priority_window;
1571 	unsigned int	status;
1572 } __packed;
1573 
1574 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1575 			 unsigned int cmd, unsigned long arg)
1576 {
1577 	struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1578 	struct compat_ica_xcRB xcRB32;
1579 	struct ica_xcRB xcRB64;
1580 	long rc;
1581 
1582 	if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1583 		return -EFAULT;
1584 	xcRB64.agent_ID = xcRB32.agent_ID;
1585 	xcRB64.user_defined = xcRB32.user_defined;
1586 	xcRB64.request_ID = xcRB32.request_ID;
1587 	xcRB64.request_control_blk_length =
1588 		xcRB32.request_control_blk_length;
1589 	xcRB64.request_control_blk_addr =
1590 		compat_ptr(xcRB32.request_control_blk_addr);
1591 	xcRB64.request_data_length =
1592 		xcRB32.request_data_length;
1593 	xcRB64.request_data_address =
1594 		compat_ptr(xcRB32.request_data_address);
1595 	xcRB64.reply_control_blk_length =
1596 		xcRB32.reply_control_blk_length;
1597 	xcRB64.reply_control_blk_addr =
1598 		compat_ptr(xcRB32.reply_control_blk_addr);
1599 	xcRB64.reply_data_length = xcRB32.reply_data_length;
1600 	xcRB64.reply_data_addr =
1601 		compat_ptr(xcRB32.reply_data_addr);
1602 	xcRB64.priority_window = xcRB32.priority_window;
1603 	xcRB64.status = xcRB32.status;
1604 	do {
1605 		rc = _zcrypt_send_cprb(perms, &xcRB64);
1606 	} while (rc == -EAGAIN);
1607 	/* on failure: retry once again after a requested rescan */
1608 	if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1609 		do {
1610 			rc = _zcrypt_send_cprb(perms, &xcRB64);
1611 		} while (rc == -EAGAIN);
1612 	xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1613 	xcRB32.reply_data_length = xcRB64.reply_data_length;
1614 	xcRB32.status = xcRB64.status;
1615 	if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1616 		return -EFAULT;
1617 	return rc;
1618 }
1619 
1620 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1621 			 unsigned long arg)
1622 {
1623 	int rc;
1624 	struct ap_perms *perms =
1625 		(struct ap_perms *) filp->private_data;
1626 
1627 	rc = zcrypt_check_ioctl(perms, cmd);
1628 	if (rc)
1629 		return rc;
1630 
1631 	if (cmd == ICARSAMODEXPO)
1632 		return trans_modexpo32(perms, filp, cmd, arg);
1633 	if (cmd == ICARSACRT)
1634 		return trans_modexpo_crt32(perms, filp, cmd, arg);
1635 	if (cmd == ZSECSENDCPRB)
1636 		return trans_xcRB32(perms, filp, cmd, arg);
1637 	return zcrypt_unlocked_ioctl(filp, cmd, arg);
1638 }
1639 #endif
1640 
1641 /*
1642  * Misc device file operations.
1643  */
1644 static const struct file_operations zcrypt_fops = {
1645 	.owner		= THIS_MODULE,
1646 	.read		= zcrypt_read,
1647 	.write		= zcrypt_write,
1648 	.unlocked_ioctl	= zcrypt_unlocked_ioctl,
1649 #ifdef CONFIG_COMPAT
1650 	.compat_ioctl	= zcrypt_compat_ioctl,
1651 #endif
1652 	.open		= zcrypt_open,
1653 	.release	= zcrypt_release,
1654 	.llseek		= no_llseek,
1655 };
1656 
1657 /*
1658  * Misc device.
1659  */
1660 static struct miscdevice zcrypt_misc_device = {
1661 	.minor	    = MISC_DYNAMIC_MINOR,
1662 	.name	    = "z90crypt",
1663 	.fops	    = &zcrypt_fops,
1664 };
1665 
1666 static int zcrypt_rng_device_count;
1667 static u32 *zcrypt_rng_buffer;
1668 static int zcrypt_rng_buffer_index;
1669 static DEFINE_MUTEX(zcrypt_rng_mutex);
1670 
1671 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1672 {
1673 	int rc;
1674 
1675 	/*
1676 	 * We don't need locking here because the RNG API guarantees serialized
1677 	 * read method calls.
1678 	 */
1679 	if (zcrypt_rng_buffer_index == 0) {
1680 		rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1681 		/* on failure: retry once again after a requested rescan */
1682 		if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1683 			rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1684 		if (rc < 0)
1685 			return -EIO;
1686 		zcrypt_rng_buffer_index = rc / sizeof(*data);
1687 	}
1688 	*data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1689 	return sizeof(*data);
1690 }
1691 
1692 static struct hwrng zcrypt_rng_dev = {
1693 	.name		= "zcrypt",
1694 	.data_read	= zcrypt_rng_data_read,
1695 	.quality	= 990,
1696 };
1697 
1698 int zcrypt_rng_device_add(void)
1699 {
1700 	int rc = 0;
1701 
1702 	mutex_lock(&zcrypt_rng_mutex);
1703 	if (zcrypt_rng_device_count == 0) {
1704 		zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1705 		if (!zcrypt_rng_buffer) {
1706 			rc = -ENOMEM;
1707 			goto out;
1708 		}
1709 		zcrypt_rng_buffer_index = 0;
1710 		if (!zcrypt_hwrng_seed)
1711 			zcrypt_rng_dev.quality = 0;
1712 		rc = hwrng_register(&zcrypt_rng_dev);
1713 		if (rc)
1714 			goto out_free;
1715 		zcrypt_rng_device_count = 1;
1716 	} else
1717 		zcrypt_rng_device_count++;
1718 	mutex_unlock(&zcrypt_rng_mutex);
1719 	return 0;
1720 
1721 out_free:
1722 	free_page((unsigned long) zcrypt_rng_buffer);
1723 out:
1724 	mutex_unlock(&zcrypt_rng_mutex);
1725 	return rc;
1726 }
1727 
1728 void zcrypt_rng_device_remove(void)
1729 {
1730 	mutex_lock(&zcrypt_rng_mutex);
1731 	zcrypt_rng_device_count--;
1732 	if (zcrypt_rng_device_count == 0) {
1733 		hwrng_unregister(&zcrypt_rng_dev);
1734 		free_page((unsigned long) zcrypt_rng_buffer);
1735 	}
1736 	mutex_unlock(&zcrypt_rng_mutex);
1737 }
1738 
1739 int __init zcrypt_debug_init(void)
1740 {
1741 	zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1742 					 DBF_MAX_SPRINTF_ARGS * sizeof(long));
1743 	debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1744 	debug_set_level(zcrypt_dbf_info, DBF_ERR);
1745 
1746 	return 0;
1747 }
1748 
1749 void zcrypt_debug_exit(void)
1750 {
1751 	debug_unregister(zcrypt_dbf_info);
1752 }
1753 
1754 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1755 
1756 static int __init zcdn_init(void)
1757 {
1758 	int rc;
1759 
1760 	/* create a new class 'zcrypt' */
1761 	zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
1762 	if (IS_ERR(zcrypt_class)) {
1763 		rc = PTR_ERR(zcrypt_class);
1764 		goto out_class_create_failed;
1765 	}
1766 	zcrypt_class->dev_release = zcdn_device_release;
1767 
1768 	/* alloc device minor range */
1769 	rc = alloc_chrdev_region(&zcrypt_devt,
1770 				 0, ZCRYPT_MAX_MINOR_NODES,
1771 				 ZCRYPT_NAME);
1772 	if (rc)
1773 		goto out_alloc_chrdev_failed;
1774 
1775 	cdev_init(&zcrypt_cdev, &zcrypt_fops);
1776 	zcrypt_cdev.owner = THIS_MODULE;
1777 	rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1778 	if (rc)
1779 		goto out_cdev_add_failed;
1780 
1781 	/* need some class specific sysfs attributes */
1782 	rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
1783 	if (rc)
1784 		goto out_class_create_file_1_failed;
1785 	rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
1786 	if (rc)
1787 		goto out_class_create_file_2_failed;
1788 
1789 	return 0;
1790 
1791 out_class_create_file_2_failed:
1792 	class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1793 out_class_create_file_1_failed:
1794 	cdev_del(&zcrypt_cdev);
1795 out_cdev_add_failed:
1796 	unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1797 out_alloc_chrdev_failed:
1798 	class_destroy(zcrypt_class);
1799 out_class_create_failed:
1800 	return rc;
1801 }
1802 
1803 static void zcdn_exit(void)
1804 {
1805 	class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1806 	class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
1807 	zcdn_destroy_all();
1808 	cdev_del(&zcrypt_cdev);
1809 	unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1810 	class_destroy(zcrypt_class);
1811 }
1812 
1813 #endif
1814 
1815 /**
1816  * zcrypt_api_init(): Module initialization.
1817  *
1818  * The module initialization code.
1819  */
1820 int __init zcrypt_api_init(void)
1821 {
1822 	int rc;
1823 
1824 	rc = zcrypt_debug_init();
1825 	if (rc)
1826 		goto out;
1827 
1828 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1829 	rc = zcdn_init();
1830 	if (rc)
1831 		goto out;
1832 #endif
1833 
1834 	/* Register the request sprayer. */
1835 	rc = misc_register(&zcrypt_misc_device);
1836 	if (rc < 0)
1837 		goto out_misc_register_failed;
1838 
1839 	zcrypt_msgtype6_init();
1840 	zcrypt_msgtype50_init();
1841 
1842 	return 0;
1843 
1844 out_misc_register_failed:
1845 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1846 	zcdn_exit();
1847 #endif
1848 	zcrypt_debug_exit();
1849 out:
1850 	return rc;
1851 }
1852 
1853 /**
1854  * zcrypt_api_exit(): Module termination.
1855  *
1856  * The module termination code.
1857  */
1858 void __exit zcrypt_api_exit(void)
1859 {
1860 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1861 	zcdn_exit();
1862 #endif
1863 	misc_deregister(&zcrypt_misc_device);
1864 	zcrypt_msgtype6_exit();
1865 	zcrypt_msgtype50_exit();
1866 	zcrypt_debug_exit();
1867 }
1868 
1869 module_init(zcrypt_api_init);
1870 module_exit(zcrypt_api_exit);
1871