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vfs: remove extraneous NULL d_inode check from do_filp_open
[linux-2.6-block.git] / drivers / s390 / crypto / zcrypt_api.c
CommitLineData
2dbc2418
MS		 1/*
2 * linux/drivers/s390/crypto/zcrypt_api.c
3 *
5432114b 4 * zcrypt 2.1.0
2dbc2418
MS		 5 *
6 * Copyright (C) 2001, 2006 IBM Corporation
7 * Author(s): Robert Burroughs
8 * Eric Rossman (edrossma@us.ibm.com)
9 * Cornelia Huck <cornelia.huck@de.ibm.com>
10 *
11 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
12 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 * Ralph Wuerthner <rwuerthn@de.ibm.com>
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2, or (at your option)
18 * any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 */
29
30#include <linux/module.h>
31#include <linux/init.h>
32#include <linux/interrupt.h>
33#include <linux/miscdevice.h>
34#include <linux/fs.h>
35#include <linux/proc_fs.h>
36#include <linux/compat.h>
e73322ce 37#include <linux/smp_lock.h>
2dbc2418
MS		 38#include <asm/atomic.h>
39#include <asm/uaccess.h>
2f7c8bd6 40#include <linux/hw_random.h>
2dbc2418
MS		 41
42#include "zcrypt_api.h"
43
1749a81d 44/*
2dbc2418
MS		 45 * Module description.
46 */
47MODULE_AUTHOR("IBM Corporation");
48MODULE_DESCRIPTION("Cryptographic Coprocessor interface, "
49 "Copyright 2001, 2006 IBM Corporation");
50MODULE_LICENSE("GPL");
51
52static DEFINE_SPINLOCK(zcrypt_device_lock);
53static LIST_HEAD(zcrypt_device_list);
54static int zcrypt_device_count = 0;
55static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
56
2f7c8bd6
RW		 57static int zcrypt_rng_device_add(void);
58static void zcrypt_rng_device_remove(void);
59
1749a81d 60/*
2dbc2418
MS		 61 * Device attributes common for all crypto devices.
62 */
63static ssize_t zcrypt_type_show(struct device *dev,
64 struct device_attribute *attr, char *buf)
65{
66 struct zcrypt_device *zdev = to_ap_dev(dev)->private;
67 return snprintf(buf, PAGE_SIZE, "%s\n", zdev->type_string);
68}
69
70static DEVICE_ATTR(type, 0444, zcrypt_type_show, NULL);
71
72static ssize_t zcrypt_online_show(struct device *dev,
73 struct device_attribute *attr, char *buf)
74{
75 struct zcrypt_device *zdev = to_ap_dev(dev)->private;
76 return snprintf(buf, PAGE_SIZE, "%d\n", zdev->online);
77}
78
79static ssize_t zcrypt_online_store(struct device *dev,
80 struct device_attribute *attr,
81 const char *buf, size_t count)
82{
83 struct zcrypt_device *zdev = to_ap_dev(dev)->private;
84 int online;
85
86 if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1)
87 return -EINVAL;
88 zdev->online = online;
89 if (!online)
90 ap_flush_queue(zdev->ap_dev);
91 return count;
92}
93
94static DEVICE_ATTR(online, 0644, zcrypt_online_show, zcrypt_online_store);
95
96static struct attribute * zcrypt_device_attrs[] = {
97 &dev_attr_type.attr,
98 &dev_attr_online.attr,
99 NULL,
100};
101
102static struct attribute_group zcrypt_device_attr_group = {
103 .attrs = zcrypt_device_attrs,
104};
105
106/**
1749a81d
FB		 107 * __zcrypt_increase_preference(): Increase preference of a crypto device.
108 * @zdev: Pointer the crypto device
109 *
2dbc2418
MS		 110 * Move the device towards the head of the device list.
111 * Need to be called while holding the zcrypt device list lock.
112 * Note: cards with speed_rating of 0 are kept at the end of the list.
113 */
114static void __zcrypt_increase_preference(struct zcrypt_device *zdev)
115{
116 struct zcrypt_device *tmp;
117 struct list_head *l;
118
119 if (zdev->speed_rating == 0)
120 return;
121 for (l = zdev->list.prev; l != &zcrypt_device_list; l = l->prev) {
122 tmp = list_entry(l, struct zcrypt_device, list);
123 if ((tmp->request_count + 1) * tmp->speed_rating <=
124 (zdev->request_count + 1) * zdev->speed_rating &&
125 tmp->speed_rating != 0)
126 break;
127 }
128 if (l == zdev->list.prev)
129 return;
130 /* Move zdev behind l */
1fbc9f46 131 list_move(&zdev->list, l);
2dbc2418
MS		 132}
133
134/**
1749a81d
FB		 135 * __zcrypt_decrease_preference(): Decrease preference of a crypto device.
136 * @zdev: Pointer to a crypto device.
137 *
2dbc2418
MS		 138 * Move the device towards the tail of the device list.
139 * Need to be called while holding the zcrypt device list lock.
140 * Note: cards with speed_rating of 0 are kept at the end of the list.
141 */
142static void __zcrypt_decrease_preference(struct zcrypt_device *zdev)
143{
144 struct zcrypt_device *tmp;
145 struct list_head *l;
146
147 if (zdev->speed_rating == 0)
148 return;
149 for (l = zdev->list.next; l != &zcrypt_device_list; l = l->next) {
150 tmp = list_entry(l, struct zcrypt_device, list);
151 if ((tmp->request_count + 1) * tmp->speed_rating >
152 (zdev->request_count + 1) * zdev->speed_rating ||
153 tmp->speed_rating == 0)
154 break;
155 }
156 if (l == zdev->list.next)
157 return;
158 /* Move zdev before l */
1fbc9f46 159 list_move_tail(&zdev->list, l);
2dbc2418
MS		 160}
161
162static void zcrypt_device_release(struct kref *kref)
163{
164 struct zcrypt_device *zdev =
165 container_of(kref, struct zcrypt_device, refcount);
166 zcrypt_device_free(zdev);
167}
168
169void zcrypt_device_get(struct zcrypt_device *zdev)
170{
171 kref_get(&zdev->refcount);
172}
173EXPORT_SYMBOL(zcrypt_device_get);
174
175int zcrypt_device_put(struct zcrypt_device *zdev)
176{
177 return kref_put(&zdev->refcount, zcrypt_device_release);
178}
179EXPORT_SYMBOL(zcrypt_device_put);
180
181struct zcrypt_device *zcrypt_device_alloc(size_t max_response_size)
182{
183 struct zcrypt_device *zdev;
184
185 zdev = kzalloc(sizeof(struct zcrypt_device), GFP_KERNEL);
186 if (!zdev)
187 return NULL;
188 zdev->reply.message = kmalloc(max_response_size, GFP_KERNEL);
189 if (!zdev->reply.message)
190 goto out_free;
191 zdev->reply.length = max_response_size;
192 spin_lock_init(&zdev->lock);
193 INIT_LIST_HEAD(&zdev->list);
194 return zdev;
195
196out_free:
197 kfree(zdev);
198 return NULL;
199}
200EXPORT_SYMBOL(zcrypt_device_alloc);
201
202void zcrypt_device_free(struct zcrypt_device *zdev)
203{
204 kfree(zdev->reply.message);
205 kfree(zdev);
206}
207EXPORT_SYMBOL(zcrypt_device_free);
208
209/**
1749a81d
FB		 210 * zcrypt_device_register() - Register a crypto device.
211 * @zdev: Pointer to a crypto device
212 *
213 * Register a crypto device. Returns 0 if successful.
2dbc2418
MS		 214 */
215int zcrypt_device_register(struct zcrypt_device *zdev)
216{
217 int rc;
218
219 rc = sysfs_create_group(&zdev->ap_dev->device.kobj,
220 &zcrypt_device_attr_group);
221 if (rc)
222 goto out;
223 get_device(&zdev->ap_dev->device);
224 kref_init(&zdev->refcount);
225 spin_lock_bh(&zcrypt_device_lock);
226 zdev->online = 1; /* New devices are online by default. */
227 list_add_tail(&zdev->list, &zcrypt_device_list);
228 __zcrypt_increase_preference(zdev);
229 zcrypt_device_count++;
230 spin_unlock_bh(&zcrypt_device_lock);
2f7c8bd6
RW		 231 if (zdev->ops->rng) {
232 rc = zcrypt_rng_device_add();
233 if (rc)
234 goto out_unregister;
235 }
236 return 0;
237
238out_unregister:
239 spin_lock_bh(&zcrypt_device_lock);
240 zcrypt_device_count--;
241 list_del_init(&zdev->list);
242 spin_unlock_bh(&zcrypt_device_lock);
243 sysfs_remove_group(&zdev->ap_dev->device.kobj,
244 &zcrypt_device_attr_group);
245 put_device(&zdev->ap_dev->device);
246 zcrypt_device_put(zdev);
2dbc2418
MS		 247out:
248 return rc;
249}
250EXPORT_SYMBOL(zcrypt_device_register);
251
252/**
1749a81d
FB		 253 * zcrypt_device_unregister(): Unregister a crypto device.
254 * @zdev: Pointer to crypto device
255 *
2dbc2418
MS		 256 * Unregister a crypto device.
257 */
258void zcrypt_device_unregister(struct zcrypt_device *zdev)
259{
2f7c8bd6
RW		 260 if (zdev->ops->rng)
261 zcrypt_rng_device_remove();
2dbc2418
MS		 262 spin_lock_bh(&zcrypt_device_lock);
263 zcrypt_device_count--;
264 list_del_init(&zdev->list);
265 spin_unlock_bh(&zcrypt_device_lock);
266 sysfs_remove_group(&zdev->ap_dev->device.kobj,
267 &zcrypt_device_attr_group);
268 put_device(&zdev->ap_dev->device);
269 zcrypt_device_put(zdev);
270}
271EXPORT_SYMBOL(zcrypt_device_unregister);
272
273/**
1749a81d
FB		 274 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
275 *
276 * This function is not supported beyond zcrypt 1.3.1.
2dbc2418
MS		 277 */
278static ssize_t zcrypt_read(struct file *filp, char __user *buf,
279 size_t count, loff_t *f_pos)
280{
281 return -EPERM;
282}
283
284/**
1749a81d
FB		 285 * zcrypt_write(): Not allowed.
286 *
2dbc2418
MS		 287 * Write is is not allowed
288 */
289static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
290 size_t count, loff_t *f_pos)
291{
292 return -EPERM;
293}
294
295/**
1749a81d
FB		 296 * zcrypt_open(): Count number of users.
297 *
298 * Device open function to count number of users.
2dbc2418
MS		 299 */
300static int zcrypt_open(struct inode *inode, struct file *filp)
301{
302 atomic_inc(&zcrypt_open_count);
303 return 0;
304}
305
1749a81d
FB		 306/**
307 * zcrypt_release(): Count number of users.
308 *
309 * Device close function to count number of users.
310 */
2dbc2418
MS		 311static int zcrypt_release(struct inode *inode, struct file *filp)
312{
313 atomic_dec(&zcrypt_open_count);
314 return 0;
315}
316
1749a81d 317/*
2dbc2418
MS		 318 * zcrypt ioctls.
319 */
320static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
321{
322 struct zcrypt_device *zdev;
323 int rc;
324
325 if (mex->outputdatalength < mex->inputdatalength)
326 return -EINVAL;
1749a81d 327 /*
2dbc2418
MS		 328 * As long as outputdatalength is big enough, we can set the
329 * outputdatalength equal to the inputdatalength, since that is the
330 * number of bytes we will copy in any case
331 */
332 mex->outputdatalength = mex->inputdatalength;
333
334 spin_lock_bh(&zcrypt_device_lock);
335 list_for_each_entry(zdev, &zcrypt_device_list, list) {
336 if (!zdev->online ||
337 !zdev->ops->rsa_modexpo ||
338 zdev->min_mod_size > mex->inputdatalength ||
339 zdev->max_mod_size < mex->inputdatalength)
340 continue;
341 zcrypt_device_get(zdev);
342 get_device(&zdev->ap_dev->device);
343 zdev->request_count++;
344 __zcrypt_decrease_preference(zdev);
2dbc2418 345 if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
43a867a2 346 spin_unlock_bh(&zcrypt_device_lock);
2dbc2418 347 rc = zdev->ops->rsa_modexpo(zdev, mex);
43a867a2 348 spin_lock_bh(&zcrypt_device_lock);
2dbc2418
MS		 349 module_put(zdev->ap_dev->drv->driver.owner);
350 }
351 else
352 rc = -EAGAIN;
2dbc2418
MS		 353 zdev->request_count--;
354 __zcrypt_increase_preference(zdev);
355 put_device(&zdev->ap_dev->device);
356 zcrypt_device_put(zdev);
357 spin_unlock_bh(&zcrypt_device_lock);
358 return rc;
359 }
360 spin_unlock_bh(&zcrypt_device_lock);
361 return -ENODEV;
362}
363
364static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
365{
366 struct zcrypt_device *zdev;
367 unsigned long long z1, z2, z3;
368 int rc, copied;
369
370 if (crt->outputdatalength < crt->inputdatalength ||
371 (crt->inputdatalength & 1))
372 return -EINVAL;
1749a81d 373 /*
2dbc2418
MS		 374 * As long as outputdatalength is big enough, we can set the
375 * outputdatalength equal to the inputdatalength, since that is the
376 * number of bytes we will copy in any case
377 */
378 crt->outputdatalength = crt->inputdatalength;
379
380 copied = 0;
381 restart:
382 spin_lock_bh(&zcrypt_device_lock);
383 list_for_each_entry(zdev, &zcrypt_device_list, list) {
384 if (!zdev->online ||
385 !zdev->ops->rsa_modexpo_crt ||
386 zdev->min_mod_size > crt->inputdatalength ||
387 zdev->max_mod_size < crt->inputdatalength)
388 continue;
389 if (zdev->short_crt && crt->inputdatalength > 240) {
1749a81d 390 /*
2dbc2418
MS		 391 * Check inputdata for leading zeros for cards
392 * that can't handle np_prime, bp_key, or
393 * u_mult_inv > 128 bytes.
394 */
395 if (copied == 0) {
396 int len;
397 spin_unlock_bh(&zcrypt_device_lock);
398 /* len is max 256 / 2 - 120 = 8 */
399 len = crt->inputdatalength / 2 - 120;
400 z1 = z2 = z3 = 0;
401 if (copy_from_user(&z1, crt->np_prime, len) ||
402 copy_from_user(&z2, crt->bp_key, len) ||
403 copy_from_user(&z3, crt->u_mult_inv, len))
404 return -EFAULT;
405 copied = 1;
1749a81d 406 /*
2dbc2418
MS		 407 * We have to restart device lookup -
408 * the device list may have changed by now.
409 */
410 goto restart;
411 }
412 if (z1 != 0ULL || z2 != 0ULL || z3 != 0ULL)
413 /* The device can't handle this request. */
414 continue;
415 }
416 zcrypt_device_get(zdev);
417 get_device(&zdev->ap_dev->device);
418 zdev->request_count++;
419 __zcrypt_decrease_preference(zdev);
2dbc2418 420 if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
43a867a2 421 spin_unlock_bh(&zcrypt_device_lock);
2dbc2418 422 rc = zdev->ops->rsa_modexpo_crt(zdev, crt);
43a867a2 423 spin_lock_bh(&zcrypt_device_lock);
2dbc2418
MS		 424 module_put(zdev->ap_dev->drv->driver.owner);
425 }
426 else
427 rc = -EAGAIN;
2dbc2418
MS		 428 zdev->request_count--;
429 __zcrypt_increase_preference(zdev);
430 put_device(&zdev->ap_dev->device);
431 zcrypt_device_put(zdev);
432 spin_unlock_bh(&zcrypt_device_lock);
433 return rc;
434 }
435 spin_unlock_bh(&zcrypt_device_lock);
436 return -ENODEV;
437}
438
5432114b
RW		 439static long zcrypt_send_cprb(struct ica_xcRB *xcRB)
440{
441 struct zcrypt_device *zdev;
442 int rc;
443
444 spin_lock_bh(&zcrypt_device_lock);
445 list_for_each_entry(zdev, &zcrypt_device_list, list) {
446 if (!zdev->online || !zdev->ops->send_cprb ||
447 (xcRB->user_defined != AUTOSELECT &&
448 AP_QID_DEVICE(zdev->ap_dev->qid) != xcRB->user_defined)
449 )
450 continue;
451 zcrypt_device_get(zdev);
452 get_device(&zdev->ap_dev->device);
453 zdev->request_count++;
454 __zcrypt_decrease_preference(zdev);
5432114b 455 if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
43a867a2 456 spin_unlock_bh(&zcrypt_device_lock);
5432114b 457 rc = zdev->ops->send_cprb(zdev, xcRB);
43a867a2 458 spin_lock_bh(&zcrypt_device_lock);
5432114b
RW		 459 module_put(zdev->ap_dev->drv->driver.owner);
460 }
461 else
462 rc = -EAGAIN;
5432114b
RW		 463 zdev->request_count--;
464 __zcrypt_increase_preference(zdev);
465 put_device(&zdev->ap_dev->device);
466 zcrypt_device_put(zdev);
467 spin_unlock_bh(&zcrypt_device_lock);
468 return rc;
469 }
470 spin_unlock_bh(&zcrypt_device_lock);
471 return -ENODEV;
472}
473
2f7c8bd6
RW		 474static long zcrypt_rng(char *buffer)
475{
476 struct zcrypt_device *zdev;
477 int rc;
478
479 spin_lock_bh(&zcrypt_device_lock);
480 list_for_each_entry(zdev, &zcrypt_device_list, list) {
481 if (!zdev->online || !zdev->ops->rng)
482 continue;
483 zcrypt_device_get(zdev);
484 get_device(&zdev->ap_dev->device);
485 zdev->request_count++;
486 __zcrypt_decrease_preference(zdev);
487 if (try_module_get(zdev->ap_dev->drv->driver.owner)) {
488 spin_unlock_bh(&zcrypt_device_lock);
489 rc = zdev->ops->rng(zdev, buffer);
490 spin_lock_bh(&zcrypt_device_lock);
491 module_put(zdev->ap_dev->drv->driver.owner);
492 } else
493 rc = -EAGAIN;
494 zdev->request_count--;
495 __zcrypt_increase_preference(zdev);
496 put_device(&zdev->ap_dev->device);
497 zcrypt_device_put(zdev);
498 spin_unlock_bh(&zcrypt_device_lock);
499 return rc;
500 }
501 spin_unlock_bh(&zcrypt_device_lock);
502 return -ENODEV;
503}
504
2dbc2418
MS		 505static void zcrypt_status_mask(char status[AP_DEVICES])
506{
507 struct zcrypt_device *zdev;
508
509 memset(status, 0, sizeof(char) * AP_DEVICES);
510 spin_lock_bh(&zcrypt_device_lock);
511 list_for_each_entry(zdev, &zcrypt_device_list, list)
512 status[AP_QID_DEVICE(zdev->ap_dev->qid)] =
513 zdev->online ? zdev->user_space_type : 0x0d;
514 spin_unlock_bh(&zcrypt_device_lock);
515}
516
517static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES])
518{
519 struct zcrypt_device *zdev;
520
521 memset(qdepth, 0, sizeof(char) * AP_DEVICES);
522 spin_lock_bh(&zcrypt_device_lock);
523 list_for_each_entry(zdev, &zcrypt_device_list, list) {
524 spin_lock(&zdev->ap_dev->lock);
525 qdepth[AP_QID_DEVICE(zdev->ap_dev->qid)] =
526 zdev->ap_dev->pendingq_count +
527 zdev->ap_dev->requestq_count;
528 spin_unlock(&zdev->ap_dev->lock);
529 }
530 spin_unlock_bh(&zcrypt_device_lock);
531}
532
533static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES])
534{
535 struct zcrypt_device *zdev;
536
537 memset(reqcnt, 0, sizeof(int) * AP_DEVICES);
538 spin_lock_bh(&zcrypt_device_lock);
539 list_for_each_entry(zdev, &zcrypt_device_list, list) {
540 spin_lock(&zdev->ap_dev->lock);
541 reqcnt[AP_QID_DEVICE(zdev->ap_dev->qid)] =
542 zdev->ap_dev->total_request_count;
543 spin_unlock(&zdev->ap_dev->lock);
544 }
545 spin_unlock_bh(&zcrypt_device_lock);
546}
547
548static int zcrypt_pendingq_count(void)
549{
550 struct zcrypt_device *zdev;
551 int pendingq_count = 0;
552
553 spin_lock_bh(&zcrypt_device_lock);
554 list_for_each_entry(zdev, &zcrypt_device_list, list) {
555 spin_lock(&zdev->ap_dev->lock);
556 pendingq_count += zdev->ap_dev->pendingq_count;
557 spin_unlock(&zdev->ap_dev->lock);
558 }
559 spin_unlock_bh(&zcrypt_device_lock);
560 return pendingq_count;
561}
562
563static int zcrypt_requestq_count(void)
564{
565 struct zcrypt_device *zdev;
566 int requestq_count = 0;
567
568 spin_lock_bh(&zcrypt_device_lock);
569 list_for_each_entry(zdev, &zcrypt_device_list, list) {
570 spin_lock(&zdev->ap_dev->lock);
571 requestq_count += zdev->ap_dev->requestq_count;
572 spin_unlock(&zdev->ap_dev->lock);
573 }
574 spin_unlock_bh(&zcrypt_device_lock);
575 return requestq_count;
576}
577
578static int zcrypt_count_type(int type)
579{
580 struct zcrypt_device *zdev;
581 int device_count = 0;
582
583 spin_lock_bh(&zcrypt_device_lock);
584 list_for_each_entry(zdev, &zcrypt_device_list, list)
585 if (zdev->user_space_type == type)
586 device_count++;
587 spin_unlock_bh(&zcrypt_device_lock);
588 return device_count;
589}
590
591/**
1749a81d
FB		 592 * zcrypt_ica_status(): Old, depracted combi status call.
593 *
2dbc2418
MS		 594 * Old, deprecated combi status call.
595 */
596static long zcrypt_ica_status(struct file *filp, unsigned long arg)
597{
598 struct ica_z90_status *pstat;
599 int ret;
600
601 pstat = kzalloc(sizeof(*pstat), GFP_KERNEL);
602 if (!pstat)
603 return -ENOMEM;
604 pstat->totalcount = zcrypt_device_count;
605 pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA);
606 pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC);
607 pstat->requestqWaitCount = zcrypt_requestq_count();
608 pstat->pendingqWaitCount = zcrypt_pendingq_count();
609 pstat->totalOpenCount = atomic_read(&zcrypt_open_count);
610 pstat->cryptoDomain = ap_domain_index;
611 zcrypt_status_mask(pstat->status);
612 zcrypt_qdepth_mask(pstat->qdepth);
613 ret = 0;
614 if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat)))
615 ret = -EFAULT;
616 kfree(pstat);
617 return ret;
618}
619
620static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
621 unsigned long arg)
622{
623 int rc;
624
625 switch (cmd) {
626 case ICARSAMODEXPO: {
627 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
628 struct ica_rsa_modexpo mex;
629 if (copy_from_user(&mex, umex, sizeof(mex)))
630 return -EFAULT;
631 do {
632 rc = zcrypt_rsa_modexpo(&mex);
633 } while (rc == -EAGAIN);
634 if (rc)
635 return rc;
636 return put_user(mex.outputdatalength, &umex->outputdatalength);
637 }
638 case ICARSACRT: {
639 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
640 struct ica_rsa_modexpo_crt crt;
641 if (copy_from_user(&crt, ucrt, sizeof(crt)))
642 return -EFAULT;
643 do {
644 rc = zcrypt_rsa_crt(&crt);
645 } while (rc == -EAGAIN);
646 if (rc)
647 return rc;
648 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
649 }
5432114b
RW		 650 case ZSECSENDCPRB: {
651 struct ica_xcRB __user *uxcRB = (void __user *) arg;
652 struct ica_xcRB xcRB;
653 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
654 return -EFAULT;
655 do {
656 rc = zcrypt_send_cprb(&xcRB);
657 } while (rc == -EAGAIN);
658 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
659 return -EFAULT;
660 return rc;
661 }
2dbc2418
MS		 662 case Z90STAT_STATUS_MASK: {
663 char status[AP_DEVICES];
664 zcrypt_status_mask(status);
665 if (copy_to_user((char __user *) arg, status,
666 sizeof(char) * AP_DEVICES))
667 return -EFAULT;
668 return 0;
669 }
670 case Z90STAT_QDEPTH_MASK: {
671 char qdepth[AP_DEVICES];
672 zcrypt_qdepth_mask(qdepth);
673 if (copy_to_user((char __user *) arg, qdepth,
674 sizeof(char) * AP_DEVICES))
675 return -EFAULT;
676 return 0;
677 }
678 case Z90STAT_PERDEV_REQCNT: {
679 int reqcnt[AP_DEVICES];
680 zcrypt_perdev_reqcnt(reqcnt);
681 if (copy_to_user((int __user *) arg, reqcnt,
682 sizeof(int) * AP_DEVICES))
683 return -EFAULT;
684 return 0;
685 }
686 case Z90STAT_REQUESTQ_COUNT:
687 return put_user(zcrypt_requestq_count(), (int __user *) arg);
688 case Z90STAT_PENDINGQ_COUNT:
689 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
690 case Z90STAT_TOTALOPEN_COUNT:
691 return put_user(atomic_read(&zcrypt_open_count),
692 (int __user *) arg);
693 case Z90STAT_DOMAIN_INDEX:
694 return put_user(ap_domain_index, (int __user *) arg);
1749a81d 695 /*
2dbc2418
MS		 696 * Deprecated ioctls. Don't add another device count ioctl,
697 * you can count them yourself in the user space with the
698 * output of the Z90STAT_STATUS_MASK ioctl.
699 */
700 case ICAZ90STATUS:
701 return zcrypt_ica_status(filp, arg);
702 case Z90STAT_TOTALCOUNT:
703 return put_user(zcrypt_device_count, (int __user *) arg);
704 case Z90STAT_PCICACOUNT:
705 return put_user(zcrypt_count_type(ZCRYPT_PCICA),
706 (int __user *) arg);
707 case Z90STAT_PCICCCOUNT:
708 return put_user(zcrypt_count_type(ZCRYPT_PCICC),
709 (int __user *) arg);
710 case Z90STAT_PCIXCCMCL2COUNT:
711 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2),
712 (int __user *) arg);
713 case Z90STAT_PCIXCCMCL3COUNT:
714 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
715 (int __user *) arg);
716 case Z90STAT_PCIXCCCOUNT:
717 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) +
718 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
719 (int __user *) arg);
720 case Z90STAT_CEX2CCOUNT:
721 return put_user(zcrypt_count_type(ZCRYPT_CEX2C),
722 (int __user *) arg);
723 case Z90STAT_CEX2ACOUNT:
724 return put_user(zcrypt_count_type(ZCRYPT_CEX2A),
725 (int __user *) arg);
726 default:
727 /* unknown ioctl number */
728 return -ENOIOCTLCMD;
729 }
730}
731
732#ifdef CONFIG_COMPAT
1749a81d 733/*
2dbc2418
MS		 734 * ioctl32 conversion routines
735 */
736struct compat_ica_rsa_modexpo {
737 compat_uptr_t inputdata;
738 unsigned int inputdatalength;
739 compat_uptr_t outputdata;
740 unsigned int outputdatalength;
741 compat_uptr_t b_key;
742 compat_uptr_t n_modulus;
743};
744
745static long trans_modexpo32(struct file *filp, unsigned int cmd,
746 unsigned long arg)
747{
748 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
749 struct compat_ica_rsa_modexpo mex32;
750 struct ica_rsa_modexpo mex64;
751 long rc;
752
753 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
754 return -EFAULT;
755 mex64.inputdata = compat_ptr(mex32.inputdata);
756 mex64.inputdatalength = mex32.inputdatalength;
757 mex64.outputdata = compat_ptr(mex32.outputdata);
758 mex64.outputdatalength = mex32.outputdatalength;
759 mex64.b_key = compat_ptr(mex32.b_key);
760 mex64.n_modulus = compat_ptr(mex32.n_modulus);
761 do {
762 rc = zcrypt_rsa_modexpo(&mex64);
763 } while (rc == -EAGAIN);
764 if (!rc)
765 rc = put_user(mex64.outputdatalength,
766 &umex32->outputdatalength);
767 return rc;
768}
769
770struct compat_ica_rsa_modexpo_crt {
771 compat_uptr_t inputdata;
772 unsigned int inputdatalength;
773 compat_uptr_t outputdata;
774 unsigned int outputdatalength;
775 compat_uptr_t bp_key;
776 compat_uptr_t bq_key;
777 compat_uptr_t np_prime;
778 compat_uptr_t nq_prime;
779 compat_uptr_t u_mult_inv;
780};
781
782static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
783 unsigned long arg)
784{
785 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
786 struct compat_ica_rsa_modexpo_crt crt32;
787 struct ica_rsa_modexpo_crt crt64;
788 long rc;
789
790 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
791 return -EFAULT;
792 crt64.inputdata = compat_ptr(crt32.inputdata);
793 crt64.inputdatalength = crt32.inputdatalength;
794 crt64.outputdata= compat_ptr(crt32.outputdata);
795 crt64.outputdatalength = crt32.outputdatalength;
796 crt64.bp_key = compat_ptr(crt32.bp_key);
797 crt64.bq_key = compat_ptr(crt32.bq_key);
798 crt64.np_prime = compat_ptr(crt32.np_prime);
799 crt64.nq_prime = compat_ptr(crt32.nq_prime);
800 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
801 do {
802 rc = zcrypt_rsa_crt(&crt64);
803 } while (rc == -EAGAIN);
804 if (!rc)
805 rc = put_user(crt64.outputdatalength,
806 &ucrt32->outputdatalength);
807 return rc;
808}
809
5432114b
RW		 810struct compat_ica_xcRB {
811 unsigned short agent_ID;
812 unsigned int user_defined;
813 unsigned short request_ID;
814 unsigned int request_control_blk_length;
815 unsigned char padding1[16 - sizeof (compat_uptr_t)];
816 compat_uptr_t request_control_blk_addr;
817 unsigned int request_data_length;
818 char padding2[16 - sizeof (compat_uptr_t)];
819 compat_uptr_t request_data_address;
820 unsigned int reply_control_blk_length;
821 char padding3[16 - sizeof (compat_uptr_t)];
822 compat_uptr_t reply_control_blk_addr;
823 unsigned int reply_data_length;
824 char padding4[16 - sizeof (compat_uptr_t)];
825 compat_uptr_t reply_data_addr;
826 unsigned short priority_window;
827 unsigned int status;
828} __attribute__((packed));
829
830static long trans_xcRB32(struct file *filp, unsigned int cmd,
831 unsigned long arg)
832{
833 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
834 struct compat_ica_xcRB xcRB32;
835 struct ica_xcRB xcRB64;
836 long rc;
837
838 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
839 return -EFAULT;
840 xcRB64.agent_ID = xcRB32.agent_ID;
841 xcRB64.user_defined = xcRB32.user_defined;
842 xcRB64.request_ID = xcRB32.request_ID;
843 xcRB64.request_control_blk_length =
844 xcRB32.request_control_blk_length;
845 xcRB64.request_control_blk_addr =
846 compat_ptr(xcRB32.request_control_blk_addr);
847 xcRB64.request_data_length =
848 xcRB32.request_data_length;
849 xcRB64.request_data_address =
850 compat_ptr(xcRB32.request_data_address);
851 xcRB64.reply_control_blk_length =
852 xcRB32.reply_control_blk_length;
853 xcRB64.reply_control_blk_addr =
854 compat_ptr(xcRB32.reply_control_blk_addr);
855 xcRB64.reply_data_length = xcRB32.reply_data_length;
856 xcRB64.reply_data_addr =
857 compat_ptr(xcRB32.reply_data_addr);
858 xcRB64.priority_window = xcRB32.priority_window;
859 xcRB64.status = xcRB32.status;
860 do {
861 rc = zcrypt_send_cprb(&xcRB64);
862 } while (rc == -EAGAIN);
863 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
864 xcRB32.reply_data_length = xcRB64.reply_data_length;
865 xcRB32.status = xcRB64.status;
866 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
867 return -EFAULT;
868 return rc;
869}
870
2b67fc46 871static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
2dbc2418
MS		 872 unsigned long arg)
873{
874 if (cmd == ICARSAMODEXPO)
875 return trans_modexpo32(filp, cmd, arg);
876 if (cmd == ICARSACRT)
877 return trans_modexpo_crt32(filp, cmd, arg);
5432114b
RW		 878 if (cmd == ZSECSENDCPRB)
879 return trans_xcRB32(filp, cmd, arg);
2dbc2418
MS		 880 return zcrypt_unlocked_ioctl(filp, cmd, arg);
881}
882#endif
883
1749a81d 884/*
2dbc2418
MS		 885 * Misc device file operations.
886 */
d54b1fdb 887static const struct file_operations zcrypt_fops = {
2dbc2418
MS		 888 .owner = THIS_MODULE,
889 .read = zcrypt_read,
890 .write = zcrypt_write,
891 .unlocked_ioctl = zcrypt_unlocked_ioctl,
892#ifdef CONFIG_COMPAT
893 .compat_ioctl = zcrypt_compat_ioctl,
894#endif
895 .open = zcrypt_open,
896 .release = zcrypt_release
897};
898
1749a81d 899/*
2dbc2418
MS		 900 * Misc device.
901 */
902static struct miscdevice zcrypt_misc_device = {
903 .minor = MISC_DYNAMIC_MINOR,
904 .name = "z90crypt",
905 .fops = &zcrypt_fops,
906};
907
1749a81d 908/*
2dbc2418
MS		 909 * Deprecated /proc entry support.
910 */
911static struct proc_dir_entry *zcrypt_entry;
912
4d284cac
HC		 913static int sprintcl(unsigned char *outaddr, unsigned char *addr,
914 unsigned int len)
2dbc2418
MS		 915{
916 int hl, i;
917
918 hl = 0;
919 for (i = 0; i < len; i++)
920 hl += sprintf(outaddr+hl, "%01x", (unsigned int) addr[i]);
921 hl += sprintf(outaddr+hl, " ");
922 return hl;
923}
924
4d284cac
HC		 925static int sprintrw(unsigned char *outaddr, unsigned char *addr,
926 unsigned int len)
2dbc2418
MS		 927{
928 int hl, inl, c, cx;
929
930 hl = sprintf(outaddr, " ");
931 inl = 0;
932 for (c = 0; c < (len / 16); c++) {
933 hl += sprintcl(outaddr+hl, addr+inl, 16);
934 inl += 16;
935 }
936 cx = len%16;
937 if (cx) {
938 hl += sprintcl(outaddr+hl, addr+inl, cx);
939 inl += cx;
940 }
941 hl += sprintf(outaddr+hl, "\n");
942 return hl;
943}
944
4d284cac
HC		 945static int sprinthx(unsigned char *title, unsigned char *outaddr,
946 unsigned char *addr, unsigned int len)
2dbc2418
MS		 947{
948 int hl, inl, r, rx;
949
950 hl = sprintf(outaddr, "\n%s\n", title);
951 inl = 0;
952 for (r = 0; r < (len / 64); r++) {
953 hl += sprintrw(outaddr+hl, addr+inl, 64);
954 inl += 64;
955 }
956 rx = len % 64;
957 if (rx) {
958 hl += sprintrw(outaddr+hl, addr+inl, rx);
959 inl += rx;
960 }
961 hl += sprintf(outaddr+hl, "\n");
962 return hl;
963}
964
4d284cac
HC		 965static int sprinthx4(unsigned char *title, unsigned char *outaddr,
966 unsigned int *array, unsigned int len)
2dbc2418
MS		 967{
968 int hl, r;
969
970 hl = sprintf(outaddr, "\n%s\n", title);
971 for (r = 0; r < len; r++) {
972 if ((r % 8) == 0)
973 hl += sprintf(outaddr+hl, " ");
974 hl += sprintf(outaddr+hl, "%08X ", array[r]);
975 if ((r % 8) == 7)
976 hl += sprintf(outaddr+hl, "\n");
977 }
978 hl += sprintf(outaddr+hl, "\n");
979 return hl;
980}
981
982static int zcrypt_status_read(char *resp_buff, char **start, off_t offset,
983 int count, int *eof, void *data)
984{
985 unsigned char *workarea;
986 int len;
987
988 len = 0;
989
990 /* resp_buff is a page. Use the right half for a work area */
991 workarea = resp_buff + 2000;
992 len += sprintf(resp_buff + len, "\nzcrypt version: %d.%d.%d\n",
993 ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT);
994 len += sprintf(resp_buff + len, "Cryptographic domain: %d\n",
995 ap_domain_index);
996 len += sprintf(resp_buff + len, "Total device count: %d\n",
997 zcrypt_device_count);
998 len += sprintf(resp_buff + len, "PCICA count: %d\n",
999 zcrypt_count_type(ZCRYPT_PCICA));
1000 len += sprintf(resp_buff + len, "PCICC count: %d\n",
1001 zcrypt_count_type(ZCRYPT_PCICC));
1002 len += sprintf(resp_buff + len, "PCIXCC MCL2 count: %d\n",
1003 zcrypt_count_type(ZCRYPT_PCIXCC_MCL2));
1004 len += sprintf(resp_buff + len, "PCIXCC MCL3 count: %d\n",
1005 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3));
1006 len += sprintf(resp_buff + len, "CEX2C count: %d\n",
1007 zcrypt_count_type(ZCRYPT_CEX2C));
1008 len += sprintf(resp_buff + len, "CEX2A count: %d\n",
1009 zcrypt_count_type(ZCRYPT_CEX2A));
ffda4f71
FB		 1010 len += sprintf(resp_buff + len, "CEX3C count: %d\n",
1011 zcrypt_count_type(ZCRYPT_CEX3C));
1012 len += sprintf(resp_buff + len, "CEX3A count: %d\n",
1013 zcrypt_count_type(ZCRYPT_CEX3A));
2dbc2418
MS		 1014 len += sprintf(resp_buff + len, "requestq count: %d\n",
1015 zcrypt_requestq_count());
1016 len += sprintf(resp_buff + len, "pendingq count: %d\n",
1017 zcrypt_pendingq_count());
1018 len += sprintf(resp_buff + len, "Total open handles: %d\n\n",
1019 atomic_read(&zcrypt_open_count));
1020 zcrypt_status_mask(workarea);
1021 len += sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) "
ffda4f71 1022 "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A",
2dbc2418
MS		 1023 resp_buff+len, workarea, AP_DEVICES);
1024 zcrypt_qdepth_mask(workarea);
1025 len += sprinthx("Waiting work element counts",
1026 resp_buff+len, workarea, AP_DEVICES);
2b67fc46 1027 zcrypt_perdev_reqcnt((int *) workarea);
2dbc2418
MS		 1028 len += sprinthx4("Per-device successfully completed request counts",
1029 resp_buff+len,(unsigned int *) workarea, AP_DEVICES);
1030 *eof = 1;
1031 memset((void *) workarea, 0x00, AP_DEVICES * sizeof(unsigned int));
1032 return len;
1033}
1034
1035static void zcrypt_disable_card(int index)
1036{
1037 struct zcrypt_device *zdev;
1038
1039 spin_lock_bh(&zcrypt_device_lock);
1040 list_for_each_entry(zdev, &zcrypt_device_list, list)
1041 if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) {
1042 zdev->online = 0;
1043 ap_flush_queue(zdev->ap_dev);
1044 break;
1045 }
1046 spin_unlock_bh(&zcrypt_device_lock);
1047}
1048
1049static void zcrypt_enable_card(int index)
1050{
1051 struct zcrypt_device *zdev;
1052
1053 spin_lock_bh(&zcrypt_device_lock);
1054 list_for_each_entry(zdev, &zcrypt_device_list, list)
1055 if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) {
1056 zdev->online = 1;
1057 break;
1058 }
1059 spin_unlock_bh(&zcrypt_device_lock);
1060}
1061
1062static int zcrypt_status_write(struct file *file, const char __user *buffer,
1063 unsigned long count, void *data)
1064{
1065 unsigned char *lbuf, *ptr;
1066 unsigned long local_count;
1067 int j;
1068
1069 if (count <= 0)
1070 return 0;
1071
1072#define LBUFSIZE 1200UL
1073 lbuf = kmalloc(LBUFSIZE, GFP_KERNEL);
1a89dd8f 1074 if (!lbuf)
2dbc2418 1075 return 0;
2dbc2418
MS		 1076
1077 local_count = min(LBUFSIZE - 1, count);
1078 if (copy_from_user(lbuf, buffer, local_count) != 0) {
1079 kfree(lbuf);
1080 return -EFAULT;
1081 }
1082 lbuf[local_count] = '\0';
1083
1084 ptr = strstr(lbuf, "Online devices");
1a89dd8f 1085 if (!ptr)
2dbc2418 1086 goto out;
2dbc2418 1087 ptr = strstr(ptr, "\n");
1a89dd8f 1088 if (!ptr)
2dbc2418 1089 goto out;
2dbc2418
MS		 1090 ptr++;
1091
1a89dd8f 1092 if (strstr(ptr, "Waiting work element counts") == NULL)
2dbc2418 1093 goto out;
2dbc2418
MS		 1094
1095 for (j = 0; j < 64 && *ptr; ptr++) {
1749a81d 1096 /*
2dbc2418
MS		 1097 * '0' for no device, '1' for PCICA, '2' for PCICC,
1098 * '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3,
1099 * '5' for CEX2C and '6' for CEX2A'
ffda4f71 1100 * '7' for CEX3C and '8' for CEX3A
2dbc2418 1101 */
ffda4f71 1102 if (*ptr >= '0' && *ptr <= '8')
2dbc2418
MS		 1103 j++;
1104 else if (*ptr == 'd' || *ptr == 'D')
1105 zcrypt_disable_card(j++);
1106 else if (*ptr == 'e' || *ptr == 'E')
1107 zcrypt_enable_card(j++);
1108 else if (*ptr != ' ' && *ptr != '\t')
1109 break;
1110 }
1111out:
1112 kfree(lbuf);
1113 return count;
1114}
1115
2f7c8bd6
RW		 1116static int zcrypt_rng_device_count;
1117static u32 *zcrypt_rng_buffer;
1118static int zcrypt_rng_buffer_index;
1119static DEFINE_MUTEX(zcrypt_rng_mutex);
1120
1121static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1122{
1123 int rc;
1124
1749a81d 1125 /*
2f7c8bd6
RW		 1126 * We don't need locking here because the RNG API guarantees serialized
1127 * read method calls.
1128 */
1129 if (zcrypt_rng_buffer_index == 0) {
1130 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1131 if (rc < 0)
1132 return -EIO;
1133 zcrypt_rng_buffer_index = rc / sizeof *data;
1134 }
1135 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1136 return sizeof *data;
1137}
1138
1139static struct hwrng zcrypt_rng_dev = {
1140 .name = "zcrypt",
1141 .data_read = zcrypt_rng_data_read,
1142};
1143
1144static int zcrypt_rng_device_add(void)
1145{
1146 int rc = 0;
1147
1148 mutex_lock(&zcrypt_rng_mutex);
1149 if (zcrypt_rng_device_count == 0) {
1150 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1151 if (!zcrypt_rng_buffer) {
1152 rc = -ENOMEM;
1153 goto out;
1154 }
1155 zcrypt_rng_buffer_index = 0;
1156 rc = hwrng_register(&zcrypt_rng_dev);
1157 if (rc)
1158 goto out_free;
1159 zcrypt_rng_device_count = 1;
1160 } else
1161 zcrypt_rng_device_count++;
1162 mutex_unlock(&zcrypt_rng_mutex);
1163 return 0;
1164
1165out_free:
1166 free_page((unsigned long) zcrypt_rng_buffer);
1167out:
1168 mutex_unlock(&zcrypt_rng_mutex);
1169 return rc;
1170}
1171
1172static void zcrypt_rng_device_remove(void)
1173{
1174 mutex_lock(&zcrypt_rng_mutex);
1175 zcrypt_rng_device_count--;
1176 if (zcrypt_rng_device_count == 0) {
1177 hwrng_unregister(&zcrypt_rng_dev);
1178 free_page((unsigned long) zcrypt_rng_buffer);
1179 }
1180 mutex_unlock(&zcrypt_rng_mutex);
1181}
1182
2dbc2418 1183/**
1749a81d
FB		 1184 * zcrypt_api_init(): Module initialization.
1185 *
2dbc2418
MS		 1186 * The module initialization code.
1187 */
1188int __init zcrypt_api_init(void)
1189{
1190 int rc;
1191
1192 /* Register the request sprayer. */
1193 rc = misc_register(&zcrypt_misc_device);
1a89dd8f 1194 if (rc < 0)
2dbc2418 1195 goto out;
2dbc2418
MS		 1196
1197 /* Set up the proc file system */
1198 zcrypt_entry = create_proc_entry("driver/z90crypt", 0644, NULL);
1199 if (!zcrypt_entry) {
2dbc2418
MS		 1200 rc = -ENOMEM;
1201 goto out_misc;
1202 }
2dbc2418
MS		 1203 zcrypt_entry->data = NULL;
1204 zcrypt_entry->read_proc = zcrypt_status_read;
1205 zcrypt_entry->write_proc = zcrypt_status_write;
1206
1207 return 0;
1208
1209out_misc:
1210 misc_deregister(&zcrypt_misc_device);
1211out:
1212 return rc;
1213}
1214
1215/**
1749a81d
FB		 1216 * zcrypt_api_exit(): Module termination.
1217 *
2dbc2418
MS		 1218 * The module termination code.
1219 */
1220void zcrypt_api_exit(void)
1221{
1222 remove_proc_entry("driver/z90crypt", NULL);
1223 misc_deregister(&zcrypt_misc_device);
1224}
1225
1226#ifndef CONFIG_ZCRYPT_MONOLITHIC
1227module_init(zcrypt_api_init);
1228module_exit(zcrypt_api_exit);
1229#endif
Linux 6.x block layer and io_uring tree(s)