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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 <linux/capability.h>
29#include <asm/debug.h>
30
31#define CREATE_TRACE_POINTS
32#include <asm/trace/zcrypt.h>
33
34#include "zcrypt_api.h"
35#include "zcrypt_debug.h"
36
37#include "zcrypt_msgtype6.h"
38#include "zcrypt_msgtype50.h"
39#include "zcrypt_ccamisc.h"
40#include "zcrypt_ep11misc.h"
41
42/*
43 * Module description.
44 */
45MODULE_AUTHOR("IBM Corporation");
46MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
47 "Copyright IBM Corp. 2001, 2012");
48MODULE_LICENSE("GPL");
49
50/*
51 * zcrypt tracepoint functions
52 */
53EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
54EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
55
56DEFINE_SPINLOCK(zcrypt_list_lock);
57LIST_HEAD(zcrypt_card_list);
58
59static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
60static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
61
62atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
63EXPORT_SYMBOL(zcrypt_rescan_req);
64
65static LIST_HEAD(zcrypt_ops_list);
66
67/* Zcrypt related debug feature stuff. */
68debug_info_t *zcrypt_dbf_info;
69
70/*
71 * Process a rescan of the transport layer.
72 *
73 * Returns 1, if the rescan has been processed, otherwise 0.
74 */
75static inline int zcrypt_process_rescan(void)
76{
77 if (atomic_read(&zcrypt_rescan_req)) {
78 atomic_set(&zcrypt_rescan_req, 0);
79 atomic_inc(&zcrypt_rescan_count);
80 ap_bus_force_rescan();
81 ZCRYPT_DBF_INFO("%s rescan count=%07d\n", __func__,
82 atomic_inc_return(&zcrypt_rescan_count));
83 return 1;
84 }
85 return 0;
86}
87
88void zcrypt_msgtype_register(struct zcrypt_ops *zops)
89{
90 list_add_tail(&zops->list, &zcrypt_ops_list);
91}
92
93void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
94{
95 list_del_init(&zops->list);
96}
97
98struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
99{
100 struct zcrypt_ops *zops;
101
102 list_for_each_entry(zops, &zcrypt_ops_list, list)
103 if (zops->variant == variant &&
104 (!strncmp(zops->name, name, sizeof(zops->name))))
105 return zops;
106 return NULL;
107}
108EXPORT_SYMBOL(zcrypt_msgtype);
109
110/*
111 * Multi device nodes extension functions.
112 */
113
114struct zcdn_device;
115
116static struct class *zcrypt_class;
117static dev_t zcrypt_devt;
118static struct cdev zcrypt_cdev;
119
120struct zcdn_device {
121 struct device device;
122 struct ap_perms perms;
123};
124
125#define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
126
127#define ZCDN_MAX_NAME 32
128
129static int zcdn_create(const char *name);
130static int zcdn_destroy(const char *name);
131
132/*
133 * Find zcdn device by name.
134 * Returns reference to the zcdn device which needs to be released
135 * with put_device() after use.
136 */
137static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
138{
139 struct device *dev = class_find_device_by_name(zcrypt_class, name);
140
141 return dev ? to_zcdn_dev(dev) : NULL;
142}
143
144/*
145 * Find zcdn device by devt value.
146 * Returns reference to the zcdn device which needs to be released
147 * with put_device() after use.
148 */
149static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
150{
151 struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
152
153 return dev ? to_zcdn_dev(dev) : NULL;
154}
155
156static ssize_t ioctlmask_show(struct device *dev,
157 struct device_attribute *attr,
158 char *buf)
159{
160 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
161 int i, n;
162
163 if (mutex_lock_interruptible(&ap_perms_mutex))
164 return -ERESTARTSYS;
165
166 n = sysfs_emit(buf, "0x");
167 for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
168 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.ioctlm[i]);
169 n += sysfs_emit_at(buf, n, "\n");
170
171 mutex_unlock(&ap_perms_mutex);
172
173 return n;
174}
175
176static ssize_t ioctlmask_store(struct device *dev,
177 struct device_attribute *attr,
178 const char *buf, size_t count)
179{
180 int rc;
181 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
182
183 rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
184 AP_IOCTLS, &ap_perms_mutex);
185 if (rc)
186 return rc;
187
188 return count;
189}
190
191static DEVICE_ATTR_RW(ioctlmask);
192
193static ssize_t apmask_show(struct device *dev,
194 struct device_attribute *attr,
195 char *buf)
196{
197 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
198 int i, n;
199
200 if (mutex_lock_interruptible(&ap_perms_mutex))
201 return -ERESTARTSYS;
202
203 n = sysfs_emit(buf, "0x");
204 for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
205 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.apm[i]);
206 n += sysfs_emit_at(buf, n, "\n");
207
208 mutex_unlock(&ap_perms_mutex);
209
210 return n;
211}
212
213static ssize_t apmask_store(struct device *dev,
214 struct device_attribute *attr,
215 const char *buf, size_t count)
216{
217 int rc;
218 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
219
220 rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
221 AP_DEVICES, &ap_perms_mutex);
222 if (rc)
223 return rc;
224
225 return count;
226}
227
228static DEVICE_ATTR_RW(apmask);
229
230static ssize_t aqmask_show(struct device *dev,
231 struct device_attribute *attr,
232 char *buf)
233{
234 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
235 int i, n;
236
237 if (mutex_lock_interruptible(&ap_perms_mutex))
238 return -ERESTARTSYS;
239
240 n = sysfs_emit(buf, "0x");
241 for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
242 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.aqm[i]);
243 n += sysfs_emit_at(buf, n, "\n");
244
245 mutex_unlock(&ap_perms_mutex);
246
247 return n;
248}
249
250static ssize_t aqmask_store(struct device *dev,
251 struct device_attribute *attr,
252 const char *buf, size_t count)
253{
254 int rc;
255 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
256
257 rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
258 AP_DOMAINS, &ap_perms_mutex);
259 if (rc)
260 return rc;
261
262 return count;
263}
264
265static DEVICE_ATTR_RW(aqmask);
266
267static ssize_t admask_show(struct device *dev,
268 struct device_attribute *attr,
269 char *buf)
270{
271 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
272 int i, n;
273
274 if (mutex_lock_interruptible(&ap_perms_mutex))
275 return -ERESTARTSYS;
276
277 n = sysfs_emit(buf, "0x");
278 for (i = 0; i < sizeof(zcdndev->perms.adm) / sizeof(long); i++)
279 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.adm[i]);
280 n += sysfs_emit_at(buf, n, "\n");
281
282 mutex_unlock(&ap_perms_mutex);
283
284 return n;
285}
286
287static ssize_t admask_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.adm,
295 AP_DOMAINS, &ap_perms_mutex);
296 if (rc)
297 return rc;
298
299 return count;
300}
301
302static DEVICE_ATTR_RW(admask);
303
304static struct attribute *zcdn_dev_attrs[] = {
305 &dev_attr_ioctlmask.attr,
306 &dev_attr_apmask.attr,
307 &dev_attr_aqmask.attr,
308 &dev_attr_admask.attr,
309 NULL
310};
311
312static struct attribute_group zcdn_dev_attr_group = {
313 .attrs = zcdn_dev_attrs
314};
315
316static const struct attribute_group *zcdn_dev_attr_groups[] = {
317 &zcdn_dev_attr_group,
318 NULL
319};
320
321static ssize_t zcdn_create_store(const struct class *class,
322 const struct class_attribute *attr,
323 const char *buf, size_t count)
324{
325 int rc;
326 char name[ZCDN_MAX_NAME];
327
328 strscpy(name, skip_spaces(buf), sizeof(name));
329
330 rc = zcdn_create(strim(name));
331
332 return rc ? rc : count;
333}
334
335static const struct class_attribute class_attr_zcdn_create =
336 __ATTR(create, 0600, NULL, zcdn_create_store);
337
338static ssize_t zcdn_destroy_store(const struct class *class,
339 const struct class_attribute *attr,
340 const char *buf, size_t count)
341{
342 int rc;
343 char name[ZCDN_MAX_NAME];
344
345 strscpy(name, skip_spaces(buf), sizeof(name));
346
347 rc = zcdn_destroy(strim(name));
348
349 return rc ? rc : count;
350}
351
352static const struct class_attribute class_attr_zcdn_destroy =
353 __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
354
355static void zcdn_device_release(struct device *dev)
356{
357 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
358
359 ZCRYPT_DBF_INFO("%s releasing zcdn device %d:%d\n",
360 __func__, MAJOR(dev->devt), MINOR(dev->devt));
361
362 kfree(zcdndev);
363}
364
365static int zcdn_create(const char *name)
366{
367 dev_t devt;
368 int i, rc = 0;
369 struct zcdn_device *zcdndev;
370
371 if (mutex_lock_interruptible(&ap_perms_mutex))
372 return -ERESTARTSYS;
373
374 /* check if device node with this name already exists */
375 if (name[0]) {
376 zcdndev = find_zcdndev_by_name(name);
377 if (zcdndev) {
378 put_device(&zcdndev->device);
379 rc = -EEXIST;
380 goto unlockout;
381 }
382 }
383
384 /* find an unused minor number */
385 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
386 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
387 zcdndev = find_zcdndev_by_devt(devt);
388 if (zcdndev)
389 put_device(&zcdndev->device);
390 else
391 break;
392 }
393 if (i == ZCRYPT_MAX_MINOR_NODES) {
394 rc = -ENOSPC;
395 goto unlockout;
396 }
397
398 /* alloc and prepare a new zcdn device */
399 zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
400 if (!zcdndev) {
401 rc = -ENOMEM;
402 goto unlockout;
403 }
404 zcdndev->device.release = zcdn_device_release;
405 zcdndev->device.class = zcrypt_class;
406 zcdndev->device.devt = devt;
407 zcdndev->device.groups = zcdn_dev_attr_groups;
408 if (name[0])
409 rc = dev_set_name(&zcdndev->device, "%s", name);
410 else
411 rc = dev_set_name(&zcdndev->device, ZCRYPT_NAME "_%d", (int)MINOR(devt));
412 if (rc) {
413 kfree(zcdndev);
414 goto unlockout;
415 }
416 rc = device_register(&zcdndev->device);
417 if (rc) {
418 put_device(&zcdndev->device);
419 goto unlockout;
420 }
421
422 ZCRYPT_DBF_INFO("%s created zcdn device %d:%d\n",
423 __func__, MAJOR(devt), MINOR(devt));
424
425unlockout:
426 mutex_unlock(&ap_perms_mutex);
427 return rc;
428}
429
430static int zcdn_destroy(const char *name)
431{
432 int rc = 0;
433 struct zcdn_device *zcdndev;
434
435 if (mutex_lock_interruptible(&ap_perms_mutex))
436 return -ERESTARTSYS;
437
438 /* try to find this zcdn device */
439 zcdndev = find_zcdndev_by_name(name);
440 if (!zcdndev) {
441 rc = -ENOENT;
442 goto unlockout;
443 }
444
445 /*
446 * The zcdn device is not hard destroyed. It is subject to
447 * reference counting and thus just needs to be unregistered.
448 */
449 put_device(&zcdndev->device);
450 device_unregister(&zcdndev->device);
451
452unlockout:
453 mutex_unlock(&ap_perms_mutex);
454 return rc;
455}
456
457static void zcdn_destroy_all(void)
458{
459 int i;
460 dev_t devt;
461 struct zcdn_device *zcdndev;
462
463 mutex_lock(&ap_perms_mutex);
464 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
465 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
466 zcdndev = find_zcdndev_by_devt(devt);
467 if (zcdndev) {
468 put_device(&zcdndev->device);
469 device_unregister(&zcdndev->device);
470 }
471 }
472 mutex_unlock(&ap_perms_mutex);
473}
474
475/*
476 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
477 *
478 * This function is not supported beyond zcrypt 1.3.1.
479 */
480static ssize_t zcrypt_read(struct file *filp, char __user *buf,
481 size_t count, loff_t *f_pos)
482{
483 return -EPERM;
484}
485
486/*
487 * zcrypt_write(): Not allowed.
488 *
489 * Write is not allowed
490 */
491static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
492 size_t count, loff_t *f_pos)
493{
494 return -EPERM;
495}
496
497/*
498 * zcrypt_open(): Count number of users.
499 *
500 * Device open function to count number of users.
501 */
502static int zcrypt_open(struct inode *inode, struct file *filp)
503{
504 struct ap_perms *perms = &ap_perms;
505
506 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
507 struct zcdn_device *zcdndev;
508
509 if (mutex_lock_interruptible(&ap_perms_mutex))
510 return -ERESTARTSYS;
511 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
512 /* find returns a reference, no get_device() needed */
513 mutex_unlock(&ap_perms_mutex);
514 if (zcdndev)
515 perms = &zcdndev->perms;
516 }
517 filp->private_data = (void *)perms;
518
519 atomic_inc(&zcrypt_open_count);
520 return stream_open(inode, filp);
521}
522
523/*
524 * zcrypt_release(): Count number of users.
525 *
526 * Device close function to count number of users.
527 */
528static int zcrypt_release(struct inode *inode, struct file *filp)
529{
530 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
531 struct zcdn_device *zcdndev;
532
533 mutex_lock(&ap_perms_mutex);
534 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
535 mutex_unlock(&ap_perms_mutex);
536 if (zcdndev) {
537 /* 2 puts here: one for find, one for open */
538 put_device(&zcdndev->device);
539 put_device(&zcdndev->device);
540 }
541 }
542
543 atomic_dec(&zcrypt_open_count);
544 return 0;
545}
546
547static inline int zcrypt_check_ioctl(struct ap_perms *perms,
548 unsigned int cmd)
549{
550 int rc = -EPERM;
551 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
552
553 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
554 if (test_bit_inv(ioctlnr, perms->ioctlm))
555 rc = 0;
556 }
557
558 if (rc)
559 ZCRYPT_DBF_WARN("%s ioctl check failed: ioctlnr=0x%04x rc=%d\n",
560 __func__, ioctlnr, rc);
561
562 return rc;
563}
564
565static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
566{
567 return test_bit_inv(card, perms->apm) ? true : false;
568}
569
570static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
571{
572 return test_bit_inv(queue, perms->aqm) ? true : false;
573}
574
575static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
576 struct zcrypt_queue *zq,
577 struct module **pmod,
578 unsigned int weight)
579{
580 if (!zq || !try_module_get(zq->queue->ap_dev.device.driver->owner))
581 return NULL;
582 zcrypt_queue_get(zq);
583 get_device(&zq->queue->ap_dev.device);
584 atomic_add(weight, &zc->load);
585 atomic_add(weight, &zq->load);
586 zq->request_count++;
587 *pmod = zq->queue->ap_dev.device.driver->owner;
588 return zq;
589}
590
591static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
592 struct zcrypt_queue *zq,
593 struct module *mod,
594 unsigned int weight)
595{
596 zq->request_count--;
597 atomic_sub(weight, &zc->load);
598 atomic_sub(weight, &zq->load);
599 put_device(&zq->queue->ap_dev.device);
600 zcrypt_queue_put(zq);
601 module_put(mod);
602}
603
604static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
605 struct zcrypt_card *pref_zc,
606 unsigned int weight,
607 unsigned int pref_weight)
608{
609 if (!pref_zc)
610 return true;
611 weight += atomic_read(&zc->load);
612 pref_weight += atomic_read(&pref_zc->load);
613 if (weight == pref_weight)
614 return atomic64_read(&zc->card->total_request_count) <
615 atomic64_read(&pref_zc->card->total_request_count);
616 return weight < pref_weight;
617}
618
619static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
620 struct zcrypt_queue *pref_zq,
621 unsigned int weight,
622 unsigned int pref_weight)
623{
624 if (!pref_zq)
625 return true;
626 weight += atomic_read(&zq->load);
627 pref_weight += atomic_read(&pref_zq->load);
628 if (weight == pref_weight)
629 return zq->queue->total_request_count <
630 pref_zq->queue->total_request_count;
631 return weight < pref_weight;
632}
633
634/*
635 * zcrypt ioctls.
636 */
637static long zcrypt_rsa_modexpo(struct ap_perms *perms,
638 struct zcrypt_track *tr,
639 struct ica_rsa_modexpo *mex)
640{
641 struct zcrypt_card *zc, *pref_zc;
642 struct zcrypt_queue *zq, *pref_zq;
643 struct ap_message ap_msg;
644 unsigned int wgt = 0, pref_wgt = 0;
645 unsigned int func_code;
646 int cpen, qpen, qid = 0, rc = -ENODEV;
647 struct module *mod;
648
649 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
650
651 ap_init_message(&ap_msg);
652
653 if (mex->outputdatalength < mex->inputdatalength) {
654 func_code = 0;
655 rc = -EINVAL;
656 goto out;
657 }
658
659 /*
660 * As long as outputdatalength is big enough, we can set the
661 * outputdatalength equal to the inputdatalength, since that is the
662 * number of bytes we will copy in any case
663 */
664 mex->outputdatalength = mex->inputdatalength;
665
666 rc = get_rsa_modex_fc(mex, &func_code);
667 if (rc)
668 goto out;
669
670 pref_zc = NULL;
671 pref_zq = NULL;
672 spin_lock(&zcrypt_list_lock);
673 for_each_zcrypt_card(zc) {
674 /* Check for usable accelerator or CCA card */
675 if (!zc->online || !zc->card->config || zc->card->chkstop ||
676 !(zc->card->hwinfo.accel || zc->card->hwinfo.cca))
677 continue;
678 /* Check for size limits */
679 if (zc->min_mod_size > mex->inputdatalength ||
680 zc->max_mod_size < mex->inputdatalength)
681 continue;
682 /* check if device node has admission for this card */
683 if (!zcrypt_check_card(perms, zc->card->id))
684 continue;
685 /* get weight index of the card device */
686 wgt = zc->speed_rating[func_code];
687 /* penalty if this msg was previously sent via this card */
688 cpen = (tr && tr->again_counter && tr->last_qid &&
689 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
690 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
691 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
692 continue;
693 for_each_zcrypt_queue(zq, zc) {
694 /* check if device is usable and eligible */
695 if (!zq->online || !zq->ops->rsa_modexpo ||
696 !ap_queue_usable(zq->queue))
697 continue;
698 /* check if device node has admission for this queue */
699 if (!zcrypt_check_queue(perms,
700 AP_QID_QUEUE(zq->queue->qid)))
701 continue;
702 /* penalty if the msg was previously sent at this qid */
703 qpen = (tr && tr->again_counter && tr->last_qid &&
704 tr->last_qid == zq->queue->qid) ?
705 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
706 if (!zcrypt_queue_compare(zq, pref_zq,
707 wgt + cpen + qpen, pref_wgt))
708 continue;
709 pref_zc = zc;
710 pref_zq = zq;
711 pref_wgt = wgt + cpen + qpen;
712 }
713 }
714 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
715 spin_unlock(&zcrypt_list_lock);
716
717 if (!pref_zq) {
718 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
719 __func__);
720 rc = -ENODEV;
721 goto out;
722 }
723
724 qid = pref_zq->queue->qid;
725 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
726
727 spin_lock(&zcrypt_list_lock);
728 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
729 spin_unlock(&zcrypt_list_lock);
730
731out:
732 ap_release_message(&ap_msg);
733 if (tr) {
734 tr->last_rc = rc;
735 tr->last_qid = qid;
736 }
737 trace_s390_zcrypt_rep(mex, func_code, rc,
738 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
739 return rc;
740}
741
742static long zcrypt_rsa_crt(struct ap_perms *perms,
743 struct zcrypt_track *tr,
744 struct ica_rsa_modexpo_crt *crt)
745{
746 struct zcrypt_card *zc, *pref_zc;
747 struct zcrypt_queue *zq, *pref_zq;
748 struct ap_message ap_msg;
749 unsigned int wgt = 0, pref_wgt = 0;
750 unsigned int func_code;
751 int cpen, qpen, qid = 0, rc = -ENODEV;
752 struct module *mod;
753
754 trace_s390_zcrypt_req(crt, TP_ICARSACRT);
755
756 ap_init_message(&ap_msg);
757
758 if (crt->outputdatalength < crt->inputdatalength) {
759 func_code = 0;
760 rc = -EINVAL;
761 goto out;
762 }
763
764 /*
765 * As long as outputdatalength is big enough, we can set the
766 * outputdatalength equal to the inputdatalength, since that is the
767 * number of bytes we will copy in any case
768 */
769 crt->outputdatalength = crt->inputdatalength;
770
771 rc = get_rsa_crt_fc(crt, &func_code);
772 if (rc)
773 goto out;
774
775 pref_zc = NULL;
776 pref_zq = NULL;
777 spin_lock(&zcrypt_list_lock);
778 for_each_zcrypt_card(zc) {
779 /* Check for usable accelerator or CCA card */
780 if (!zc->online || !zc->card->config || zc->card->chkstop ||
781 !(zc->card->hwinfo.accel || zc->card->hwinfo.cca))
782 continue;
783 /* Check for size limits */
784 if (zc->min_mod_size > crt->inputdatalength ||
785 zc->max_mod_size < crt->inputdatalength)
786 continue;
787 /* check if device node has admission for this card */
788 if (!zcrypt_check_card(perms, zc->card->id))
789 continue;
790 /* get weight index of the card device */
791 wgt = zc->speed_rating[func_code];
792 /* penalty if this msg was previously sent via this card */
793 cpen = (tr && tr->again_counter && tr->last_qid &&
794 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
795 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
796 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
797 continue;
798 for_each_zcrypt_queue(zq, zc) {
799 /* check if device is usable and eligible */
800 if (!zq->online || !zq->ops->rsa_modexpo_crt ||
801 !ap_queue_usable(zq->queue))
802 continue;
803 /* check if device node has admission for this queue */
804 if (!zcrypt_check_queue(perms,
805 AP_QID_QUEUE(zq->queue->qid)))
806 continue;
807 /* penalty if the msg was previously sent at this qid */
808 qpen = (tr && tr->again_counter && tr->last_qid &&
809 tr->last_qid == zq->queue->qid) ?
810 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
811 if (!zcrypt_queue_compare(zq, pref_zq,
812 wgt + cpen + qpen, pref_wgt))
813 continue;
814 pref_zc = zc;
815 pref_zq = zq;
816 pref_wgt = wgt + cpen + qpen;
817 }
818 }
819 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
820 spin_unlock(&zcrypt_list_lock);
821
822 if (!pref_zq) {
823 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
824 __func__);
825 rc = -ENODEV;
826 goto out;
827 }
828
829 qid = pref_zq->queue->qid;
830 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
831
832 spin_lock(&zcrypt_list_lock);
833 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
834 spin_unlock(&zcrypt_list_lock);
835
836out:
837 ap_release_message(&ap_msg);
838 if (tr) {
839 tr->last_rc = rc;
840 tr->last_qid = qid;
841 }
842 trace_s390_zcrypt_rep(crt, func_code, rc,
843 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
844 return rc;
845}
846
847static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
848 struct zcrypt_track *tr,
849 struct ica_xcRB *xcrb)
850{
851 struct zcrypt_card *zc, *pref_zc;
852 struct zcrypt_queue *zq, *pref_zq;
853 struct ap_message ap_msg;
854 unsigned int wgt = 0, pref_wgt = 0;
855 unsigned int func_code;
856 unsigned short *domain, tdom;
857 int cpen, qpen, qid = 0, rc = -ENODEV;
858 struct module *mod;
859
860 trace_s390_zcrypt_req(xcrb, TB_ZSECSENDCPRB);
861
862 xcrb->status = 0;
863 ap_init_message(&ap_msg);
864
865 rc = prep_cca_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
866 if (rc)
867 goto out;
868
869 tdom = *domain;
870 if (perms != &ap_perms && tdom < AP_DOMAINS) {
871 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
872 if (!test_bit_inv(tdom, perms->adm)) {
873 rc = -ENODEV;
874 goto out;
875 }
876 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
877 rc = -EOPNOTSUPP;
878 goto out;
879 }
880 }
881 /*
882 * If a valid target domain is set and this domain is NOT a usage
883 * domain but a control only domain, autoselect target domain.
884 */
885 if (tdom < AP_DOMAINS &&
886 !ap_test_config_usage_domain(tdom) &&
887 ap_test_config_ctrl_domain(tdom))
888 tdom = AUTOSEL_DOM;
889
890 pref_zc = NULL;
891 pref_zq = NULL;
892 spin_lock(&zcrypt_list_lock);
893 for_each_zcrypt_card(zc) {
894 /* Check for usable CCA card */
895 if (!zc->online || !zc->card->config || zc->card->chkstop ||
896 !zc->card->hwinfo.cca)
897 continue;
898 /* Check for user selected CCA card */
899 if (xcrb->user_defined != AUTOSELECT &&
900 xcrb->user_defined != zc->card->id)
901 continue;
902 /* check if request size exceeds card max msg size */
903 if (ap_msg.len > zc->card->maxmsgsize)
904 continue;
905 /* check if device node has admission for this card */
906 if (!zcrypt_check_card(perms, zc->card->id))
907 continue;
908 /* get weight index of the card device */
909 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
910 /* penalty if this msg was previously sent via this card */
911 cpen = (tr && tr->again_counter && tr->last_qid &&
912 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
913 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
914 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
915 continue;
916 for_each_zcrypt_queue(zq, zc) {
917 /* check for device usable and eligible */
918 if (!zq->online || !zq->ops->send_cprb ||
919 !ap_queue_usable(zq->queue) ||
920 (tdom != AUTOSEL_DOM &&
921 tdom != AP_QID_QUEUE(zq->queue->qid)))
922 continue;
923 /* check if device node has admission for this queue */
924 if (!zcrypt_check_queue(perms,
925 AP_QID_QUEUE(zq->queue->qid)))
926 continue;
927 /* penalty if the msg was previously sent at this qid */
928 qpen = (tr && tr->again_counter && tr->last_qid &&
929 tr->last_qid == zq->queue->qid) ?
930 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
931 if (!zcrypt_queue_compare(zq, pref_zq,
932 wgt + cpen + qpen, pref_wgt))
933 continue;
934 pref_zc = zc;
935 pref_zq = zq;
936 pref_wgt = wgt + cpen + qpen;
937 }
938 }
939 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
940 spin_unlock(&zcrypt_list_lock);
941
942 if (!pref_zq) {
943 ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n",
944 __func__, xcrb->user_defined, *domain);
945 rc = -ENODEV;
946 goto out;
947 }
948
949 /* in case of auto select, provide the correct domain */
950 qid = pref_zq->queue->qid;
951 if (*domain == AUTOSEL_DOM)
952 *domain = AP_QID_QUEUE(qid);
953
954 rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcrb, &ap_msg);
955
956 spin_lock(&zcrypt_list_lock);
957 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
958 spin_unlock(&zcrypt_list_lock);
959
960out:
961 ap_release_message(&ap_msg);
962 if (tr) {
963 tr->last_rc = rc;
964 tr->last_qid = qid;
965 }
966 trace_s390_zcrypt_rep(xcrb, func_code, rc,
967 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
968 return rc;
969}
970
971long zcrypt_send_cprb(struct ica_xcRB *xcrb)
972{
973 return _zcrypt_send_cprb(false, &ap_perms, NULL, xcrb);
974}
975EXPORT_SYMBOL(zcrypt_send_cprb);
976
977static bool is_desired_ep11_card(unsigned int dev_id,
978 unsigned short target_num,
979 struct ep11_target_dev *targets)
980{
981 while (target_num-- > 0) {
982 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
983 return true;
984 targets++;
985 }
986 return false;
987}
988
989static bool is_desired_ep11_queue(unsigned int dev_qid,
990 unsigned short target_num,
991 struct ep11_target_dev *targets)
992{
993 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
994
995 while (target_num-- > 0) {
996 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
997 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
998 return true;
999 targets++;
1000 }
1001 return false;
1002}
1003
1004static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
1005 struct zcrypt_track *tr,
1006 struct ep11_urb *xcrb)
1007{
1008 struct zcrypt_card *zc, *pref_zc;
1009 struct zcrypt_queue *zq, *pref_zq;
1010 struct ep11_target_dev *targets;
1011 unsigned short target_num;
1012 unsigned int wgt = 0, pref_wgt = 0;
1013 unsigned int func_code, domain;
1014 struct ap_message ap_msg;
1015 int cpen, qpen, qid = 0, rc = -ENODEV;
1016 struct module *mod;
1017
1018 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
1019
1020 ap_init_message(&ap_msg);
1021
1022 target_num = (unsigned short)xcrb->targets_num;
1023
1024 /* empty list indicates autoselect (all available targets) */
1025 targets = NULL;
1026 if (target_num != 0) {
1027 struct ep11_target_dev __user *uptr;
1028
1029 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
1030 if (!targets) {
1031 func_code = 0;
1032 rc = -ENOMEM;
1033 goto out;
1034 }
1035
1036 uptr = (struct ep11_target_dev __force __user *)xcrb->targets;
1037 if (z_copy_from_user(userspace, targets, uptr,
1038 target_num * sizeof(*targets))) {
1039 func_code = 0;
1040 rc = -EFAULT;
1041 goto out_free;
1042 }
1043 }
1044
1045 rc = prep_ep11_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
1046 if (rc)
1047 goto out_free;
1048
1049 if (perms != &ap_perms && domain < AUTOSEL_DOM) {
1050 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
1051 if (!test_bit_inv(domain, perms->adm)) {
1052 rc = -ENODEV;
1053 goto out_free;
1054 }
1055 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
1056 rc = -EOPNOTSUPP;
1057 goto out_free;
1058 }
1059 }
1060
1061 pref_zc = NULL;
1062 pref_zq = NULL;
1063 spin_lock(&zcrypt_list_lock);
1064 for_each_zcrypt_card(zc) {
1065 /* Check for usable EP11 card */
1066 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1067 !zc->card->hwinfo.ep11)
1068 continue;
1069 /* Check for user selected EP11 card */
1070 if (targets &&
1071 !is_desired_ep11_card(zc->card->id, target_num, targets))
1072 continue;
1073 /* check if request size exceeds card max msg size */
1074 if (ap_msg.len > zc->card->maxmsgsize)
1075 continue;
1076 /* check if device node has admission for this card */
1077 if (!zcrypt_check_card(perms, zc->card->id))
1078 continue;
1079 /* get weight index of the card device */
1080 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1081 /* penalty if this msg was previously sent via this card */
1082 cpen = (tr && tr->again_counter && tr->last_qid &&
1083 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
1084 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
1085 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
1086 continue;
1087 for_each_zcrypt_queue(zq, zc) {
1088 /* check if device is usable and eligible */
1089 if (!zq->online || !zq->ops->send_ep11_cprb ||
1090 !ap_queue_usable(zq->queue) ||
1091 (targets &&
1092 !is_desired_ep11_queue(zq->queue->qid,
1093 target_num, targets)))
1094 continue;
1095 /* check if device node has admission for this queue */
1096 if (!zcrypt_check_queue(perms,
1097 AP_QID_QUEUE(zq->queue->qid)))
1098 continue;
1099 /* penalty if the msg was previously sent at this qid */
1100 qpen = (tr && tr->again_counter && tr->last_qid &&
1101 tr->last_qid == zq->queue->qid) ?
1102 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
1103 if (!zcrypt_queue_compare(zq, pref_zq,
1104 wgt + cpen + qpen, pref_wgt))
1105 continue;
1106 pref_zc = zc;
1107 pref_zq = zq;
1108 pref_wgt = wgt + cpen + qpen;
1109 }
1110 }
1111 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1112 spin_unlock(&zcrypt_list_lock);
1113
1114 if (!pref_zq) {
1115 if (targets && target_num == 1) {
1116 ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n",
1117 __func__, (int)targets->ap_id,
1118 (int)targets->dom_id);
1119 } else if (targets) {
1120 ZCRYPT_DBF_DBG("%s no match for %d target addrs => ENODEV\n",
1121 __func__, (int)target_num);
1122 } else {
1123 ZCRYPT_DBF_DBG("%s no match for address ff.ffff => ENODEV\n",
1124 __func__);
1125 }
1126 rc = -ENODEV;
1127 goto out_free;
1128 }
1129
1130 qid = pref_zq->queue->qid;
1131 rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
1132
1133 spin_lock(&zcrypt_list_lock);
1134 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1135 spin_unlock(&zcrypt_list_lock);
1136
1137out_free:
1138 kfree(targets);
1139out:
1140 ap_release_message(&ap_msg);
1141 if (tr) {
1142 tr->last_rc = rc;
1143 tr->last_qid = qid;
1144 }
1145 trace_s390_zcrypt_rep(xcrb, func_code, rc,
1146 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1147 return rc;
1148}
1149
1150long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1151{
1152 return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb);
1153}
1154EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1155
1156static long zcrypt_rng(char *buffer)
1157{
1158 struct zcrypt_card *zc, *pref_zc;
1159 struct zcrypt_queue *zq, *pref_zq;
1160 unsigned int wgt = 0, pref_wgt = 0;
1161 unsigned int func_code;
1162 struct ap_message ap_msg;
1163 unsigned int domain;
1164 int qid = 0, rc = -ENODEV;
1165 struct module *mod;
1166
1167 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1168
1169 ap_init_message(&ap_msg);
1170 rc = prep_rng_ap_msg(&ap_msg, &func_code, &domain);
1171 if (rc)
1172 goto out;
1173
1174 pref_zc = NULL;
1175 pref_zq = NULL;
1176 spin_lock(&zcrypt_list_lock);
1177 for_each_zcrypt_card(zc) {
1178 /* Check for usable CCA card */
1179 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1180 !zc->card->hwinfo.cca)
1181 continue;
1182 /* get weight index of the card device */
1183 wgt = zc->speed_rating[func_code];
1184 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
1185 continue;
1186 for_each_zcrypt_queue(zq, zc) {
1187 /* check if device is usable and eligible */
1188 if (!zq->online || !zq->ops->rng ||
1189 !ap_queue_usable(zq->queue))
1190 continue;
1191 if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
1192 continue;
1193 pref_zc = zc;
1194 pref_zq = zq;
1195 pref_wgt = wgt;
1196 }
1197 }
1198 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1199 spin_unlock(&zcrypt_list_lock);
1200
1201 if (!pref_zq) {
1202 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
1203 __func__);
1204 rc = -ENODEV;
1205 goto out;
1206 }
1207
1208 qid = pref_zq->queue->qid;
1209 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1210
1211 spin_lock(&zcrypt_list_lock);
1212 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1213 spin_unlock(&zcrypt_list_lock);
1214
1215out:
1216 ap_release_message(&ap_msg);
1217 trace_s390_zcrypt_rep(buffer, func_code, rc,
1218 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1219 return rc;
1220}
1221
1222static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1223{
1224 struct zcrypt_card *zc;
1225 struct zcrypt_queue *zq;
1226 struct zcrypt_device_status *stat;
1227 int card, queue;
1228
1229 memset(devstatus, 0, MAX_ZDEV_ENTRIES
1230 * sizeof(struct zcrypt_device_status));
1231
1232 spin_lock(&zcrypt_list_lock);
1233 for_each_zcrypt_card(zc) {
1234 for_each_zcrypt_queue(zq, zc) {
1235 card = AP_QID_CARD(zq->queue->qid);
1236 if (card >= MAX_ZDEV_CARDIDS)
1237 continue;
1238 queue = AP_QID_QUEUE(zq->queue->qid);
1239 stat = &devstatus[card * AP_DOMAINS + queue];
1240 stat->hwtype = zc->card->ap_dev.device_type;
1241 stat->functions = zc->card->hwinfo.fac >> 26;
1242 stat->qid = zq->queue->qid;
1243 stat->online = zq->online ? 0x01 : 0x00;
1244 }
1245 }
1246 spin_unlock(&zcrypt_list_lock);
1247}
1248
1249void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1250{
1251 struct zcrypt_card *zc;
1252 struct zcrypt_queue *zq;
1253 struct zcrypt_device_status_ext *stat;
1254 int card, queue;
1255
1256 memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1257 * sizeof(struct zcrypt_device_status_ext));
1258
1259 spin_lock(&zcrypt_list_lock);
1260 for_each_zcrypt_card(zc) {
1261 for_each_zcrypt_queue(zq, zc) {
1262 card = AP_QID_CARD(zq->queue->qid);
1263 queue = AP_QID_QUEUE(zq->queue->qid);
1264 stat = &devstatus[card * AP_DOMAINS + queue];
1265 stat->hwtype = zc->card->ap_dev.device_type;
1266 stat->functions = zc->card->hwinfo.fac >> 26;
1267 stat->qid = zq->queue->qid;
1268 stat->online = zq->online ? 0x01 : 0x00;
1269 }
1270 }
1271 spin_unlock(&zcrypt_list_lock);
1272}
1273EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1274
1275int zcrypt_device_status_ext(int card, int queue,
1276 struct zcrypt_device_status_ext *devstat)
1277{
1278 struct zcrypt_card *zc;
1279 struct zcrypt_queue *zq;
1280
1281 memset(devstat, 0, sizeof(*devstat));
1282
1283 spin_lock(&zcrypt_list_lock);
1284 for_each_zcrypt_card(zc) {
1285 for_each_zcrypt_queue(zq, zc) {
1286 if (card == AP_QID_CARD(zq->queue->qid) &&
1287 queue == AP_QID_QUEUE(zq->queue->qid)) {
1288 devstat->hwtype = zc->card->ap_dev.device_type;
1289 devstat->functions = zc->card->hwinfo.fac >> 26;
1290 devstat->qid = zq->queue->qid;
1291 devstat->online = zq->online ? 0x01 : 0x00;
1292 spin_unlock(&zcrypt_list_lock);
1293 return 0;
1294 }
1295 }
1296 }
1297 spin_unlock(&zcrypt_list_lock);
1298
1299 return -ENODEV;
1300}
1301EXPORT_SYMBOL(zcrypt_device_status_ext);
1302
1303static void zcrypt_status_mask(char status[], size_t max_adapters)
1304{
1305 struct zcrypt_card *zc;
1306 struct zcrypt_queue *zq;
1307 int card;
1308
1309 memset(status, 0, max_adapters);
1310 spin_lock(&zcrypt_list_lock);
1311 for_each_zcrypt_card(zc) {
1312 for_each_zcrypt_queue(zq, zc) {
1313 card = AP_QID_CARD(zq->queue->qid);
1314 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1315 card >= max_adapters)
1316 continue;
1317 status[card] = zc->online ? zc->user_space_type : 0x0d;
1318 }
1319 }
1320 spin_unlock(&zcrypt_list_lock);
1321}
1322
1323static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1324{
1325 struct zcrypt_card *zc;
1326 struct zcrypt_queue *zq;
1327 int card;
1328
1329 memset(qdepth, 0, max_adapters);
1330 spin_lock(&zcrypt_list_lock);
1331 local_bh_disable();
1332 for_each_zcrypt_card(zc) {
1333 for_each_zcrypt_queue(zq, zc) {
1334 card = AP_QID_CARD(zq->queue->qid);
1335 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1336 card >= max_adapters)
1337 continue;
1338 spin_lock(&zq->queue->lock);
1339 qdepth[card] =
1340 zq->queue->pendingq_count +
1341 zq->queue->requestq_count;
1342 spin_unlock(&zq->queue->lock);
1343 }
1344 }
1345 local_bh_enable();
1346 spin_unlock(&zcrypt_list_lock);
1347}
1348
1349static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1350{
1351 struct zcrypt_card *zc;
1352 struct zcrypt_queue *zq;
1353 int card;
1354 u64 cnt;
1355
1356 memset(reqcnt, 0, sizeof(int) * max_adapters);
1357 spin_lock(&zcrypt_list_lock);
1358 local_bh_disable();
1359 for_each_zcrypt_card(zc) {
1360 for_each_zcrypt_queue(zq, zc) {
1361 card = AP_QID_CARD(zq->queue->qid);
1362 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1363 card >= max_adapters)
1364 continue;
1365 spin_lock(&zq->queue->lock);
1366 cnt = zq->queue->total_request_count;
1367 spin_unlock(&zq->queue->lock);
1368 reqcnt[card] = (cnt < UINT_MAX) ? (u32)cnt : UINT_MAX;
1369 }
1370 }
1371 local_bh_enable();
1372 spin_unlock(&zcrypt_list_lock);
1373}
1374
1375static int zcrypt_pendingq_count(void)
1376{
1377 struct zcrypt_card *zc;
1378 struct zcrypt_queue *zq;
1379 int pendingq_count;
1380
1381 pendingq_count = 0;
1382 spin_lock(&zcrypt_list_lock);
1383 local_bh_disable();
1384 for_each_zcrypt_card(zc) {
1385 for_each_zcrypt_queue(zq, zc) {
1386 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1387 continue;
1388 spin_lock(&zq->queue->lock);
1389 pendingq_count += zq->queue->pendingq_count;
1390 spin_unlock(&zq->queue->lock);
1391 }
1392 }
1393 local_bh_enable();
1394 spin_unlock(&zcrypt_list_lock);
1395 return pendingq_count;
1396}
1397
1398static int zcrypt_requestq_count(void)
1399{
1400 struct zcrypt_card *zc;
1401 struct zcrypt_queue *zq;
1402 int requestq_count;
1403
1404 requestq_count = 0;
1405 spin_lock(&zcrypt_list_lock);
1406 local_bh_disable();
1407 for_each_zcrypt_card(zc) {
1408 for_each_zcrypt_queue(zq, zc) {
1409 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1410 continue;
1411 spin_lock(&zq->queue->lock);
1412 requestq_count += zq->queue->requestq_count;
1413 spin_unlock(&zq->queue->lock);
1414 }
1415 }
1416 local_bh_enable();
1417 spin_unlock(&zcrypt_list_lock);
1418 return requestq_count;
1419}
1420
1421static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1422{
1423 int rc;
1424 struct zcrypt_track tr;
1425 struct ica_rsa_modexpo mex;
1426 struct ica_rsa_modexpo __user *umex = (void __user *)arg;
1427
1428 memset(&tr, 0, sizeof(tr));
1429 if (copy_from_user(&mex, umex, sizeof(mex)))
1430 return -EFAULT;
1431
1432 do {
1433 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1434 if (rc == -EAGAIN)
1435 tr.again_counter++;
1436 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1437 /* on failure: retry once again after a requested rescan */
1438 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1439 do {
1440 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1441 if (rc == -EAGAIN)
1442 tr.again_counter++;
1443 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1444 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1445 rc = -EIO;
1446 if (rc) {
1447 ZCRYPT_DBF_DBG("ioctl ICARSAMODEXPO rc=%d\n", rc);
1448 return rc;
1449 }
1450 return put_user(mex.outputdatalength, &umex->outputdatalength);
1451}
1452
1453static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1454{
1455 int rc;
1456 struct zcrypt_track tr;
1457 struct ica_rsa_modexpo_crt crt;
1458 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *)arg;
1459
1460 memset(&tr, 0, sizeof(tr));
1461 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1462 return -EFAULT;
1463
1464 do {
1465 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1466 if (rc == -EAGAIN)
1467 tr.again_counter++;
1468 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1469 /* on failure: retry once again after a requested rescan */
1470 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1471 do {
1472 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1473 if (rc == -EAGAIN)
1474 tr.again_counter++;
1475 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1476 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1477 rc = -EIO;
1478 if (rc) {
1479 ZCRYPT_DBF_DBG("ioctl ICARSACRT rc=%d\n", rc);
1480 return rc;
1481 }
1482 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1483}
1484
1485static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1486{
1487 int rc;
1488 struct ica_xcRB xcrb;
1489 struct zcrypt_track tr;
1490 struct ica_xcRB __user *uxcrb = (void __user *)arg;
1491
1492 memset(&tr, 0, sizeof(tr));
1493 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1494 return -EFAULT;
1495
1496 do {
1497 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1498 if (rc == -EAGAIN)
1499 tr.again_counter++;
1500 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1501 /* on failure: retry once again after a requested rescan */
1502 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1503 do {
1504 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1505 if (rc == -EAGAIN)
1506 tr.again_counter++;
1507 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1508 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1509 rc = -EIO;
1510 if (rc)
1511 ZCRYPT_DBF_DBG("ioctl ZSENDCPRB rc=%d status=0x%x\n",
1512 rc, xcrb.status);
1513 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1514 return -EFAULT;
1515 return rc;
1516}
1517
1518static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1519{
1520 int rc;
1521 struct ep11_urb xcrb;
1522 struct zcrypt_track tr;
1523 struct ep11_urb __user *uxcrb = (void __user *)arg;
1524
1525 memset(&tr, 0, sizeof(tr));
1526 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1527 return -EFAULT;
1528
1529 do {
1530 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1531 if (rc == -EAGAIN)
1532 tr.again_counter++;
1533 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1534 /* on failure: retry once again after a requested rescan */
1535 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1536 do {
1537 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1538 if (rc == -EAGAIN)
1539 tr.again_counter++;
1540 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1541 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1542 rc = -EIO;
1543 if (rc)
1544 ZCRYPT_DBF_DBG("ioctl ZSENDEP11CPRB rc=%d\n", rc);
1545 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1546 return -EFAULT;
1547 return rc;
1548}
1549
1550static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1551 unsigned long arg)
1552{
1553 int rc;
1554 struct ap_perms *perms =
1555 (struct ap_perms *)filp->private_data;
1556
1557 rc = zcrypt_check_ioctl(perms, cmd);
1558 if (rc)
1559 return rc;
1560
1561 switch (cmd) {
1562 case ICARSAMODEXPO:
1563 return icarsamodexpo_ioctl(perms, arg);
1564 case ICARSACRT:
1565 return icarsacrt_ioctl(perms, arg);
1566 case ZSECSENDCPRB:
1567 return zsecsendcprb_ioctl(perms, arg);
1568 case ZSENDEP11CPRB:
1569 return zsendep11cprb_ioctl(perms, arg);
1570 case ZCRYPT_DEVICE_STATUS: {
1571 struct zcrypt_device_status_ext *device_status;
1572 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1573 * sizeof(struct zcrypt_device_status_ext);
1574
1575 device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT,
1576 sizeof(struct zcrypt_device_status_ext),
1577 GFP_KERNEL);
1578 if (!device_status)
1579 return -ENOMEM;
1580 zcrypt_device_status_mask_ext(device_status);
1581 if (copy_to_user((char __user *)arg, device_status,
1582 total_size))
1583 rc = -EFAULT;
1584 kvfree(device_status);
1585 return rc;
1586 }
1587 case ZCRYPT_STATUS_MASK: {
1588 char status[AP_DEVICES];
1589
1590 zcrypt_status_mask(status, AP_DEVICES);
1591 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1592 return -EFAULT;
1593 return 0;
1594 }
1595 case ZCRYPT_QDEPTH_MASK: {
1596 char qdepth[AP_DEVICES];
1597
1598 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1599 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1600 return -EFAULT;
1601 return 0;
1602 }
1603 case ZCRYPT_PERDEV_REQCNT: {
1604 u32 *reqcnt;
1605
1606 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1607 if (!reqcnt)
1608 return -ENOMEM;
1609 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1610 if (copy_to_user((int __user *)arg, reqcnt,
1611 sizeof(u32) * AP_DEVICES))
1612 rc = -EFAULT;
1613 kfree(reqcnt);
1614 return rc;
1615 }
1616 case Z90STAT_REQUESTQ_COUNT:
1617 return put_user(zcrypt_requestq_count(), (int __user *)arg);
1618 case Z90STAT_PENDINGQ_COUNT:
1619 return put_user(zcrypt_pendingq_count(), (int __user *)arg);
1620 case Z90STAT_TOTALOPEN_COUNT:
1621 return put_user(atomic_read(&zcrypt_open_count),
1622 (int __user *)arg);
1623 case Z90STAT_DOMAIN_INDEX:
1624 return put_user(ap_domain_index, (int __user *)arg);
1625 /*
1626 * Deprecated ioctls
1627 */
1628 case ZDEVICESTATUS: {
1629 /* the old ioctl supports only 64 adapters */
1630 struct zcrypt_device_status *device_status;
1631 size_t total_size = MAX_ZDEV_ENTRIES
1632 * sizeof(struct zcrypt_device_status);
1633
1634 device_status = kzalloc(total_size, GFP_KERNEL);
1635 if (!device_status)
1636 return -ENOMEM;
1637 zcrypt_device_status_mask(device_status);
1638 if (copy_to_user((char __user *)arg, device_status,
1639 total_size))
1640 rc = -EFAULT;
1641 kfree(device_status);
1642 return rc;
1643 }
1644 case Z90STAT_STATUS_MASK: {
1645 /* the old ioctl supports only 64 adapters */
1646 char status[MAX_ZDEV_CARDIDS];
1647
1648 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1649 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1650 return -EFAULT;
1651 return 0;
1652 }
1653 case Z90STAT_QDEPTH_MASK: {
1654 /* the old ioctl supports only 64 adapters */
1655 char qdepth[MAX_ZDEV_CARDIDS];
1656
1657 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1658 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1659 return -EFAULT;
1660 return 0;
1661 }
1662 case Z90STAT_PERDEV_REQCNT: {
1663 /* the old ioctl supports only 64 adapters */
1664 u32 reqcnt[MAX_ZDEV_CARDIDS];
1665
1666 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1667 if (copy_to_user((int __user *)arg, reqcnt, sizeof(reqcnt)))
1668 return -EFAULT;
1669 return 0;
1670 }
1671 /* unknown ioctl number */
1672 default:
1673 ZCRYPT_DBF_DBG("unknown ioctl 0x%08x\n", cmd);
1674 return -ENOIOCTLCMD;
1675 }
1676}
1677
1678#ifdef CONFIG_COMPAT
1679/*
1680 * ioctl32 conversion routines
1681 */
1682struct compat_ica_rsa_modexpo {
1683 compat_uptr_t inputdata;
1684 unsigned int inputdatalength;
1685 compat_uptr_t outputdata;
1686 unsigned int outputdatalength;
1687 compat_uptr_t b_key;
1688 compat_uptr_t n_modulus;
1689};
1690
1691static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1692 unsigned int cmd, unsigned long arg)
1693{
1694 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1695 struct compat_ica_rsa_modexpo mex32;
1696 struct ica_rsa_modexpo mex64;
1697 struct zcrypt_track tr;
1698 long rc;
1699
1700 memset(&tr, 0, sizeof(tr));
1701 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1702 return -EFAULT;
1703 mex64.inputdata = compat_ptr(mex32.inputdata);
1704 mex64.inputdatalength = mex32.inputdatalength;
1705 mex64.outputdata = compat_ptr(mex32.outputdata);
1706 mex64.outputdatalength = mex32.outputdatalength;
1707 mex64.b_key = compat_ptr(mex32.b_key);
1708 mex64.n_modulus = compat_ptr(mex32.n_modulus);
1709 do {
1710 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1711 if (rc == -EAGAIN)
1712 tr.again_counter++;
1713 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1714 /* on failure: retry once again after a requested rescan */
1715 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1716 do {
1717 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1718 if (rc == -EAGAIN)
1719 tr.again_counter++;
1720 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1721 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1722 rc = -EIO;
1723 if (rc)
1724 return rc;
1725 return put_user(mex64.outputdatalength,
1726 &umex32->outputdatalength);
1727}
1728
1729struct compat_ica_rsa_modexpo_crt {
1730 compat_uptr_t inputdata;
1731 unsigned int inputdatalength;
1732 compat_uptr_t outputdata;
1733 unsigned int outputdatalength;
1734 compat_uptr_t bp_key;
1735 compat_uptr_t bq_key;
1736 compat_uptr_t np_prime;
1737 compat_uptr_t nq_prime;
1738 compat_uptr_t u_mult_inv;
1739};
1740
1741static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1742 unsigned int cmd, unsigned long arg)
1743{
1744 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1745 struct compat_ica_rsa_modexpo_crt crt32;
1746 struct ica_rsa_modexpo_crt crt64;
1747 struct zcrypt_track tr;
1748 long rc;
1749
1750 memset(&tr, 0, sizeof(tr));
1751 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1752 return -EFAULT;
1753 crt64.inputdata = compat_ptr(crt32.inputdata);
1754 crt64.inputdatalength = crt32.inputdatalength;
1755 crt64.outputdata = compat_ptr(crt32.outputdata);
1756 crt64.outputdatalength = crt32.outputdatalength;
1757 crt64.bp_key = compat_ptr(crt32.bp_key);
1758 crt64.bq_key = compat_ptr(crt32.bq_key);
1759 crt64.np_prime = compat_ptr(crt32.np_prime);
1760 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1761 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1762 do {
1763 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1764 if (rc == -EAGAIN)
1765 tr.again_counter++;
1766 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1767 /* on failure: retry once again after a requested rescan */
1768 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1769 do {
1770 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1771 if (rc == -EAGAIN)
1772 tr.again_counter++;
1773 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1774 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1775 rc = -EIO;
1776 if (rc)
1777 return rc;
1778 return put_user(crt64.outputdatalength,
1779 &ucrt32->outputdatalength);
1780}
1781
1782struct compat_ica_xcrb {
1783 unsigned short agent_ID;
1784 unsigned int user_defined;
1785 unsigned short request_ID;
1786 unsigned int request_control_blk_length;
1787 unsigned char padding1[16 - sizeof(compat_uptr_t)];
1788 compat_uptr_t request_control_blk_addr;
1789 unsigned int request_data_length;
1790 char padding2[16 - sizeof(compat_uptr_t)];
1791 compat_uptr_t request_data_address;
1792 unsigned int reply_control_blk_length;
1793 char padding3[16 - sizeof(compat_uptr_t)];
1794 compat_uptr_t reply_control_blk_addr;
1795 unsigned int reply_data_length;
1796 char padding4[16 - sizeof(compat_uptr_t)];
1797 compat_uptr_t reply_data_addr;
1798 unsigned short priority_window;
1799 unsigned int status;
1800} __packed;
1801
1802static long trans_xcrb32(struct ap_perms *perms, struct file *filp,
1803 unsigned int cmd, unsigned long arg)
1804{
1805 struct compat_ica_xcrb __user *uxcrb32 = compat_ptr(arg);
1806 struct compat_ica_xcrb xcrb32;
1807 struct zcrypt_track tr;
1808 struct ica_xcRB xcrb64;
1809 long rc;
1810
1811 memset(&tr, 0, sizeof(tr));
1812 if (copy_from_user(&xcrb32, uxcrb32, sizeof(xcrb32)))
1813 return -EFAULT;
1814 xcrb64.agent_ID = xcrb32.agent_ID;
1815 xcrb64.user_defined = xcrb32.user_defined;
1816 xcrb64.request_ID = xcrb32.request_ID;
1817 xcrb64.request_control_blk_length =
1818 xcrb32.request_control_blk_length;
1819 xcrb64.request_control_blk_addr =
1820 compat_ptr(xcrb32.request_control_blk_addr);
1821 xcrb64.request_data_length =
1822 xcrb32.request_data_length;
1823 xcrb64.request_data_address =
1824 compat_ptr(xcrb32.request_data_address);
1825 xcrb64.reply_control_blk_length =
1826 xcrb32.reply_control_blk_length;
1827 xcrb64.reply_control_blk_addr =
1828 compat_ptr(xcrb32.reply_control_blk_addr);
1829 xcrb64.reply_data_length = xcrb32.reply_data_length;
1830 xcrb64.reply_data_addr =
1831 compat_ptr(xcrb32.reply_data_addr);
1832 xcrb64.priority_window = xcrb32.priority_window;
1833 xcrb64.status = xcrb32.status;
1834 do {
1835 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1836 if (rc == -EAGAIN)
1837 tr.again_counter++;
1838 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1839 /* on failure: retry once again after a requested rescan */
1840 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1841 do {
1842 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1843 if (rc == -EAGAIN)
1844 tr.again_counter++;
1845 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1846 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1847 rc = -EIO;
1848 xcrb32.reply_control_blk_length = xcrb64.reply_control_blk_length;
1849 xcrb32.reply_data_length = xcrb64.reply_data_length;
1850 xcrb32.status = xcrb64.status;
1851 if (copy_to_user(uxcrb32, &xcrb32, sizeof(xcrb32)))
1852 return -EFAULT;
1853 return rc;
1854}
1855
1856static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1857 unsigned long arg)
1858{
1859 int rc;
1860 struct ap_perms *perms =
1861 (struct ap_perms *)filp->private_data;
1862
1863 rc = zcrypt_check_ioctl(perms, cmd);
1864 if (rc)
1865 return rc;
1866
1867 if (cmd == ICARSAMODEXPO)
1868 return trans_modexpo32(perms, filp, cmd, arg);
1869 if (cmd == ICARSACRT)
1870 return trans_modexpo_crt32(perms, filp, cmd, arg);
1871 if (cmd == ZSECSENDCPRB)
1872 return trans_xcrb32(perms, filp, cmd, arg);
1873 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1874}
1875#endif
1876
1877/*
1878 * Misc device file operations.
1879 */
1880static const struct file_operations zcrypt_fops = {
1881 .owner = THIS_MODULE,
1882 .read = zcrypt_read,
1883 .write = zcrypt_write,
1884 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1885#ifdef CONFIG_COMPAT
1886 .compat_ioctl = zcrypt_compat_ioctl,
1887#endif
1888 .open = zcrypt_open,
1889 .release = zcrypt_release,
1890 .llseek = no_llseek,
1891};
1892
1893/*
1894 * Misc device.
1895 */
1896static struct miscdevice zcrypt_misc_device = {
1897 .minor = MISC_DYNAMIC_MINOR,
1898 .name = "z90crypt",
1899 .fops = &zcrypt_fops,
1900};
1901
1902static int zcrypt_rng_device_count;
1903static u32 *zcrypt_rng_buffer;
1904static int zcrypt_rng_buffer_index;
1905static DEFINE_MUTEX(zcrypt_rng_mutex);
1906
1907static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1908{
1909 int rc;
1910
1911 /*
1912 * We don't need locking here because the RNG API guarantees serialized
1913 * read method calls.
1914 */
1915 if (zcrypt_rng_buffer_index == 0) {
1916 rc = zcrypt_rng((char *)zcrypt_rng_buffer);
1917 /* on failure: retry once again after a requested rescan */
1918 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1919 rc = zcrypt_rng((char *)zcrypt_rng_buffer);
1920 if (rc < 0)
1921 return -EIO;
1922 zcrypt_rng_buffer_index = rc / sizeof(*data);
1923 }
1924 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1925 return sizeof(*data);
1926}
1927
1928static struct hwrng zcrypt_rng_dev = {
1929 .name = "zcrypt",
1930 .data_read = zcrypt_rng_data_read,
1931 .quality = 990,
1932};
1933
1934int zcrypt_rng_device_add(void)
1935{
1936 int rc = 0;
1937
1938 mutex_lock(&zcrypt_rng_mutex);
1939 if (zcrypt_rng_device_count == 0) {
1940 zcrypt_rng_buffer = (u32 *)get_zeroed_page(GFP_KERNEL);
1941 if (!zcrypt_rng_buffer) {
1942 rc = -ENOMEM;
1943 goto out;
1944 }
1945 zcrypt_rng_buffer_index = 0;
1946 rc = hwrng_register(&zcrypt_rng_dev);
1947 if (rc)
1948 goto out_free;
1949 zcrypt_rng_device_count = 1;
1950 } else {
1951 zcrypt_rng_device_count++;
1952 }
1953 mutex_unlock(&zcrypt_rng_mutex);
1954 return 0;
1955
1956out_free:
1957 free_page((unsigned long)zcrypt_rng_buffer);
1958out:
1959 mutex_unlock(&zcrypt_rng_mutex);
1960 return rc;
1961}
1962
1963void zcrypt_rng_device_remove(void)
1964{
1965 mutex_lock(&zcrypt_rng_mutex);
1966 zcrypt_rng_device_count--;
1967 if (zcrypt_rng_device_count == 0) {
1968 hwrng_unregister(&zcrypt_rng_dev);
1969 free_page((unsigned long)zcrypt_rng_buffer);
1970 }
1971 mutex_unlock(&zcrypt_rng_mutex);
1972}
1973
1974/*
1975 * Wait until the zcrypt api is operational.
1976 * The AP bus scan and the binding of ap devices to device drivers is
1977 * an asynchronous job. This function waits until these initial jobs
1978 * are done and so the zcrypt api should be ready to serve crypto
1979 * requests - if there are resources available. The function uses an
1980 * internal timeout of 60s. The very first caller will either wait for
1981 * ap bus bindings complete or the timeout happens. This state will be
1982 * remembered for further callers which will only be blocked until a
1983 * decision is made (timeout or bindings complete).
1984 * On timeout -ETIME is returned, on success the return value is 0.
1985 */
1986int zcrypt_wait_api_operational(void)
1987{
1988 static DEFINE_MUTEX(zcrypt_wait_api_lock);
1989 static int zcrypt_wait_api_state;
1990 int rc;
1991
1992 rc = mutex_lock_interruptible(&zcrypt_wait_api_lock);
1993 if (rc)
1994 return rc;
1995
1996 switch (zcrypt_wait_api_state) {
1997 case 0:
1998 /* initial state, invoke wait for the ap bus complete */
1999 rc = ap_wait_init_apqn_bindings_complete(
2000 msecs_to_jiffies(60 * 1000));
2001 switch (rc) {
2002 case 0:
2003 /* ap bus bindings are complete */
2004 zcrypt_wait_api_state = 1;
2005 break;
2006 case -EINTR:
2007 /* interrupted, go back to caller */
2008 break;
2009 case -ETIME:
2010 /* timeout */
2011 ZCRYPT_DBF_WARN("%s ap_wait_init_apqn_bindings_complete()=ETIME\n",
2012 __func__);
2013 zcrypt_wait_api_state = -ETIME;
2014 break;
2015 default:
2016 /* other failure */
2017 ZCRYPT_DBF_DBG("%s ap_wait_init_apqn_bindings_complete()=%d\n",
2018 __func__, rc);
2019 break;
2020 }
2021 break;
2022 case 1:
2023 /* a previous caller already found ap bus bindings complete */
2024 rc = 0;
2025 break;
2026 default:
2027 /* a previous caller had timeout or other failure */
2028 rc = zcrypt_wait_api_state;
2029 break;
2030 }
2031
2032 mutex_unlock(&zcrypt_wait_api_lock);
2033
2034 return rc;
2035}
2036EXPORT_SYMBOL(zcrypt_wait_api_operational);
2037
2038int __init zcrypt_debug_init(void)
2039{
2040 zcrypt_dbf_info = debug_register("zcrypt", 2, 1,
2041 DBF_MAX_SPRINTF_ARGS * sizeof(long));
2042 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
2043 debug_set_level(zcrypt_dbf_info, DBF_ERR);
2044
2045 return 0;
2046}
2047
2048void zcrypt_debug_exit(void)
2049{
2050 debug_unregister(zcrypt_dbf_info);
2051}
2052
2053static int __init zcdn_init(void)
2054{
2055 int rc;
2056
2057 /* create a new class 'zcrypt' */
2058 zcrypt_class = class_create(ZCRYPT_NAME);
2059 if (IS_ERR(zcrypt_class)) {
2060 rc = PTR_ERR(zcrypt_class);
2061 goto out_class_create_failed;
2062 }
2063 zcrypt_class->dev_release = zcdn_device_release;
2064
2065 /* alloc device minor range */
2066 rc = alloc_chrdev_region(&zcrypt_devt,
2067 0, ZCRYPT_MAX_MINOR_NODES,
2068 ZCRYPT_NAME);
2069 if (rc)
2070 goto out_alloc_chrdev_failed;
2071
2072 cdev_init(&zcrypt_cdev, &zcrypt_fops);
2073 zcrypt_cdev.owner = THIS_MODULE;
2074 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2075 if (rc)
2076 goto out_cdev_add_failed;
2077
2078 /* need some class specific sysfs attributes */
2079 rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
2080 if (rc)
2081 goto out_class_create_file_1_failed;
2082 rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
2083 if (rc)
2084 goto out_class_create_file_2_failed;
2085
2086 return 0;
2087
2088out_class_create_file_2_failed:
2089 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2090out_class_create_file_1_failed:
2091 cdev_del(&zcrypt_cdev);
2092out_cdev_add_failed:
2093 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2094out_alloc_chrdev_failed:
2095 class_destroy(zcrypt_class);
2096out_class_create_failed:
2097 return rc;
2098}
2099
2100static void zcdn_exit(void)
2101{
2102 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2103 class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
2104 zcdn_destroy_all();
2105 cdev_del(&zcrypt_cdev);
2106 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2107 class_destroy(zcrypt_class);
2108}
2109
2110/*
2111 * zcrypt_api_init(): Module initialization.
2112 *
2113 * The module initialization code.
2114 */
2115int __init zcrypt_api_init(void)
2116{
2117 int rc;
2118
2119 rc = zcrypt_debug_init();
2120 if (rc)
2121 goto out;
2122
2123 rc = zcdn_init();
2124 if (rc)
2125 goto out;
2126
2127 /* Register the request sprayer. */
2128 rc = misc_register(&zcrypt_misc_device);
2129 if (rc < 0)
2130 goto out_misc_register_failed;
2131
2132 zcrypt_msgtype6_init();
2133 zcrypt_msgtype50_init();
2134
2135 return 0;
2136
2137out_misc_register_failed:
2138 zcdn_exit();
2139 zcrypt_debug_exit();
2140out:
2141 return rc;
2142}
2143
2144/*
2145 * zcrypt_api_exit(): Module termination.
2146 *
2147 * The module termination code.
2148 */
2149void __exit zcrypt_api_exit(void)
2150{
2151 zcdn_exit();
2152 misc_deregister(&zcrypt_misc_device);
2153 zcrypt_msgtype6_exit();
2154 zcrypt_msgtype50_exit();
2155 zcrypt_ccamisc_exit();
2156 zcrypt_ep11misc_exit();
2157 zcrypt_debug_exit();
2158}
2159
2160module_init(zcrypt_api_init);
2161module_exit(zcrypt_api_exit);
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#include "zcrypt_ccamisc.h"
39#include "zcrypt_ep11misc.h"
40
41/*
42 * Module description.
43 */
44MODULE_AUTHOR("IBM Corporation");
45MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
46 "Copyright IBM Corp. 2001, 2012");
47MODULE_LICENSE("GPL");
48
49/*
50 * zcrypt tracepoint functions
51 */
52EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
53EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
54
55static int zcrypt_hwrng_seed = 1;
56module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
57MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
58
59DEFINE_SPINLOCK(zcrypt_list_lock);
60LIST_HEAD(zcrypt_card_list);
61int zcrypt_device_count;
62
63static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
64static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
65
66atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
67EXPORT_SYMBOL(zcrypt_rescan_req);
68
69static LIST_HEAD(zcrypt_ops_list);
70
71/* Zcrypt related debug feature stuff. */
72debug_info_t *zcrypt_dbf_info;
73
74/**
75 * Process a rescan of the transport layer.
76 *
77 * Returns 1, if the rescan has been processed, otherwise 0.
78 */
79static inline int zcrypt_process_rescan(void)
80{
81 if (atomic_read(&zcrypt_rescan_req)) {
82 atomic_set(&zcrypt_rescan_req, 0);
83 atomic_inc(&zcrypt_rescan_count);
84 ap_bus_force_rescan();
85 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
86 atomic_inc_return(&zcrypt_rescan_count));
87 return 1;
88 }
89 return 0;
90}
91
92void zcrypt_msgtype_register(struct zcrypt_ops *zops)
93{
94 list_add_tail(&zops->list, &zcrypt_ops_list);
95}
96
97void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
98{
99 list_del_init(&zops->list);
100}
101
102struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
103{
104 struct zcrypt_ops *zops;
105
106 list_for_each_entry(zops, &zcrypt_ops_list, list)
107 if ((zops->variant == variant) &&
108 (!strncmp(zops->name, name, sizeof(zops->name))))
109 return zops;
110 return NULL;
111}
112EXPORT_SYMBOL(zcrypt_msgtype);
113
114/*
115 * Multi device nodes extension functions.
116 */
117
118#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
119
120struct zcdn_device;
121
122static struct class *zcrypt_class;
123static dev_t zcrypt_devt;
124static struct cdev zcrypt_cdev;
125
126struct zcdn_device {
127 struct device device;
128 struct ap_perms perms;
129};
130
131#define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
132
133#define ZCDN_MAX_NAME 32
134
135static int zcdn_create(const char *name);
136static int zcdn_destroy(const char *name);
137
138/*
139 * Find zcdn device by name.
140 * Returns reference to the zcdn device which needs to be released
141 * with put_device() after use.
142 */
143static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
144{
145 struct device *dev = class_find_device_by_name(zcrypt_class, name);
146
147 return dev ? to_zcdn_dev(dev) : NULL;
148}
149
150/*
151 * Find zcdn device by devt value.
152 * Returns reference to the zcdn device which needs to be released
153 * with put_device() after use.
154 */
155static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
156{
157 struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
158
159 return dev ? to_zcdn_dev(dev) : NULL;
160}
161
162static ssize_t ioctlmask_show(struct device *dev,
163 struct device_attribute *attr,
164 char *buf)
165{
166 int i, rc;
167 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
168
169 if (mutex_lock_interruptible(&ap_perms_mutex))
170 return -ERESTARTSYS;
171
172 buf[0] = '0';
173 buf[1] = 'x';
174 for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
175 snprintf(buf + 2 + 2 * i * sizeof(long),
176 PAGE_SIZE - 2 - 2 * i * sizeof(long),
177 "%016lx", zcdndev->perms.ioctlm[i]);
178 buf[2 + 2 * i * sizeof(long)] = '\n';
179 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
180 rc = 2 + 2 * i * sizeof(long) + 1;
181
182 mutex_unlock(&ap_perms_mutex);
183
184 return rc;
185}
186
187static ssize_t ioctlmask_store(struct device *dev,
188 struct device_attribute *attr,
189 const char *buf, size_t count)
190{
191 int rc;
192 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
193
194 rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
195 AP_IOCTLS, &ap_perms_mutex);
196 if (rc)
197 return rc;
198
199 return count;
200}
201
202static DEVICE_ATTR_RW(ioctlmask);
203
204static ssize_t apmask_show(struct device *dev,
205 struct device_attribute *attr,
206 char *buf)
207{
208 int i, rc;
209 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
210
211 if (mutex_lock_interruptible(&ap_perms_mutex))
212 return -ERESTARTSYS;
213
214 buf[0] = '0';
215 buf[1] = 'x';
216 for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
217 snprintf(buf + 2 + 2 * i * sizeof(long),
218 PAGE_SIZE - 2 - 2 * i * sizeof(long),
219 "%016lx", zcdndev->perms.apm[i]);
220 buf[2 + 2 * i * sizeof(long)] = '\n';
221 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
222 rc = 2 + 2 * i * sizeof(long) + 1;
223
224 mutex_unlock(&ap_perms_mutex);
225
226 return rc;
227}
228
229static ssize_t apmask_store(struct device *dev,
230 struct device_attribute *attr,
231 const char *buf, size_t count)
232{
233 int rc;
234 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
235
236 rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
237 AP_DEVICES, &ap_perms_mutex);
238 if (rc)
239 return rc;
240
241 return count;
242}
243
244static DEVICE_ATTR_RW(apmask);
245
246static ssize_t aqmask_show(struct device *dev,
247 struct device_attribute *attr,
248 char *buf)
249{
250 int i, rc;
251 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
252
253 if (mutex_lock_interruptible(&ap_perms_mutex))
254 return -ERESTARTSYS;
255
256 buf[0] = '0';
257 buf[1] = 'x';
258 for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
259 snprintf(buf + 2 + 2 * i * sizeof(long),
260 PAGE_SIZE - 2 - 2 * i * sizeof(long),
261 "%016lx", zcdndev->perms.aqm[i]);
262 buf[2 + 2 * i * sizeof(long)] = '\n';
263 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
264 rc = 2 + 2 * i * sizeof(long) + 1;
265
266 mutex_unlock(&ap_perms_mutex);
267
268 return rc;
269}
270
271static ssize_t aqmask_store(struct device *dev,
272 struct device_attribute *attr,
273 const char *buf, size_t count)
274{
275 int rc;
276 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
277
278 rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
279 AP_DOMAINS, &ap_perms_mutex);
280 if (rc)
281 return rc;
282
283 return count;
284}
285
286static DEVICE_ATTR_RW(aqmask);
287
288static struct attribute *zcdn_dev_attrs[] = {
289 &dev_attr_ioctlmask.attr,
290 &dev_attr_apmask.attr,
291 &dev_attr_aqmask.attr,
292 NULL
293};
294
295static struct attribute_group zcdn_dev_attr_group = {
296 .attrs = zcdn_dev_attrs
297};
298
299static const struct attribute_group *zcdn_dev_attr_groups[] = {
300 &zcdn_dev_attr_group,
301 NULL
302};
303
304static ssize_t zcdn_create_store(struct class *class,
305 struct class_attribute *attr,
306 const char *buf, size_t count)
307{
308 int rc;
309 char name[ZCDN_MAX_NAME];
310
311 strncpy(name, skip_spaces(buf), sizeof(name));
312 name[sizeof(name) - 1] = '\0';
313
314 rc = zcdn_create(strim(name));
315
316 return rc ? rc : count;
317}
318
319static const struct class_attribute class_attr_zcdn_create =
320 __ATTR(create, 0600, NULL, zcdn_create_store);
321
322static ssize_t zcdn_destroy_store(struct class *class,
323 struct class_attribute *attr,
324 const char *buf, size_t count)
325{
326 int rc;
327 char name[ZCDN_MAX_NAME];
328
329 strncpy(name, skip_spaces(buf), sizeof(name));
330 name[sizeof(name) - 1] = '\0';
331
332 rc = zcdn_destroy(strim(name));
333
334 return rc ? rc : count;
335}
336
337static const struct class_attribute class_attr_zcdn_destroy =
338 __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
339
340static void zcdn_device_release(struct device *dev)
341{
342 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
343
344 ZCRYPT_DBF(DBF_INFO, "releasing zcdn device %d:%d\n",
345 MAJOR(dev->devt), MINOR(dev->devt));
346
347 kfree(zcdndev);
348}
349
350static int zcdn_create(const char *name)
351{
352 dev_t devt;
353 int i, rc = 0;
354 char nodename[ZCDN_MAX_NAME];
355 struct zcdn_device *zcdndev;
356
357 if (mutex_lock_interruptible(&ap_perms_mutex))
358 return -ERESTARTSYS;
359
360 /* check if device node with this name already exists */
361 if (name[0]) {
362 zcdndev = find_zcdndev_by_name(name);
363 if (zcdndev) {
364 put_device(&zcdndev->device);
365 rc = -EEXIST;
366 goto unlockout;
367 }
368 }
369
370 /* find an unused minor number */
371 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
372 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
373 zcdndev = find_zcdndev_by_devt(devt);
374 if (zcdndev)
375 put_device(&zcdndev->device);
376 else
377 break;
378 }
379 if (i == ZCRYPT_MAX_MINOR_NODES) {
380 rc = -ENOSPC;
381 goto unlockout;
382 }
383
384 /* alloc and prepare a new zcdn device */
385 zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
386 if (!zcdndev) {
387 rc = -ENOMEM;
388 goto unlockout;
389 }
390 zcdndev->device.release = zcdn_device_release;
391 zcdndev->device.class = zcrypt_class;
392 zcdndev->device.devt = devt;
393 zcdndev->device.groups = zcdn_dev_attr_groups;
394 if (name[0])
395 strncpy(nodename, name, sizeof(nodename));
396 else
397 snprintf(nodename, sizeof(nodename),
398 ZCRYPT_NAME "_%d", (int) MINOR(devt));
399 nodename[sizeof(nodename)-1] = '\0';
400 if (dev_set_name(&zcdndev->device, nodename)) {
401 rc = -EINVAL;
402 goto unlockout;
403 }
404 rc = device_register(&zcdndev->device);
405 if (rc) {
406 put_device(&zcdndev->device);
407 goto unlockout;
408 }
409
410 ZCRYPT_DBF(DBF_INFO, "created zcdn device %d:%d\n",
411 MAJOR(devt), MINOR(devt));
412
413unlockout:
414 mutex_unlock(&ap_perms_mutex);
415 return rc;
416}
417
418static int zcdn_destroy(const char *name)
419{
420 int rc = 0;
421 struct zcdn_device *zcdndev;
422
423 if (mutex_lock_interruptible(&ap_perms_mutex))
424 return -ERESTARTSYS;
425
426 /* try to find this zcdn device */
427 zcdndev = find_zcdndev_by_name(name);
428 if (!zcdndev) {
429 rc = -ENOENT;
430 goto unlockout;
431 }
432
433 /*
434 * The zcdn device is not hard destroyed. It is subject to
435 * reference counting and thus just needs to be unregistered.
436 */
437 put_device(&zcdndev->device);
438 device_unregister(&zcdndev->device);
439
440unlockout:
441 mutex_unlock(&ap_perms_mutex);
442 return rc;
443}
444
445static void zcdn_destroy_all(void)
446{
447 int i;
448 dev_t devt;
449 struct zcdn_device *zcdndev;
450
451 mutex_lock(&ap_perms_mutex);
452 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
453 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
454 zcdndev = find_zcdndev_by_devt(devt);
455 if (zcdndev) {
456 put_device(&zcdndev->device);
457 device_unregister(&zcdndev->device);
458 }
459 }
460 mutex_unlock(&ap_perms_mutex);
461}
462
463#endif
464
465/**
466 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
467 *
468 * This function is not supported beyond zcrypt 1.3.1.
469 */
470static ssize_t zcrypt_read(struct file *filp, char __user *buf,
471 size_t count, loff_t *f_pos)
472{
473 return -EPERM;
474}
475
476/**
477 * zcrypt_write(): Not allowed.
478 *
479 * Write is is not allowed
480 */
481static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
482 size_t count, loff_t *f_pos)
483{
484 return -EPERM;
485}
486
487/**
488 * zcrypt_open(): Count number of users.
489 *
490 * Device open function to count number of users.
491 */
492static int zcrypt_open(struct inode *inode, struct file *filp)
493{
494 struct ap_perms *perms = &ap_perms;
495
496#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
497 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
498 struct zcdn_device *zcdndev;
499
500 if (mutex_lock_interruptible(&ap_perms_mutex))
501 return -ERESTARTSYS;
502 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
503 /* find returns a reference, no get_device() needed */
504 mutex_unlock(&ap_perms_mutex);
505 if (zcdndev)
506 perms = &zcdndev->perms;
507 }
508#endif
509 filp->private_data = (void *) perms;
510
511 atomic_inc(&zcrypt_open_count);
512 return stream_open(inode, filp);
513}
514
515/**
516 * zcrypt_release(): Count number of users.
517 *
518 * Device close function to count number of users.
519 */
520static int zcrypt_release(struct inode *inode, struct file *filp)
521{
522#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
523 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
524 struct zcdn_device *zcdndev;
525
526 mutex_lock(&ap_perms_mutex);
527 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
528 mutex_unlock(&ap_perms_mutex);
529 if (zcdndev) {
530 /* 2 puts here: one for find, one for open */
531 put_device(&zcdndev->device);
532 put_device(&zcdndev->device);
533 }
534 }
535#endif
536
537 atomic_dec(&zcrypt_open_count);
538 return 0;
539}
540
541static inline int zcrypt_check_ioctl(struct ap_perms *perms,
542 unsigned int cmd)
543{
544 int rc = -EPERM;
545 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
546
547 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
548 if (test_bit_inv(ioctlnr, perms->ioctlm))
549 rc = 0;
550 }
551
552 if (rc)
553 ZCRYPT_DBF(DBF_WARN,
554 "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
555 ioctlnr, rc);
556
557 return rc;
558}
559
560static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
561{
562 return test_bit_inv(card, perms->apm) ? true : false;
563}
564
565static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
566{
567 return test_bit_inv(queue, perms->aqm) ? true : false;
568}
569
570static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
571 struct zcrypt_queue *zq,
572 struct module **pmod,
573 unsigned int weight)
574{
575 if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
576 return NULL;
577 zcrypt_queue_get(zq);
578 get_device(&zq->queue->ap_dev.device);
579 atomic_add(weight, &zc->load);
580 atomic_add(weight, &zq->load);
581 zq->request_count++;
582 *pmod = zq->queue->ap_dev.drv->driver.owner;
583 return zq;
584}
585
586static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
587 struct zcrypt_queue *zq,
588 struct module *mod,
589 unsigned int weight)
590{
591 zq->request_count--;
592 atomic_sub(weight, &zc->load);
593 atomic_sub(weight, &zq->load);
594 put_device(&zq->queue->ap_dev.device);
595 zcrypt_queue_put(zq);
596 module_put(mod);
597}
598
599static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
600 struct zcrypt_card *pref_zc,
601 unsigned int weight,
602 unsigned int pref_weight)
603{
604 if (!pref_zc)
605 return false;
606 weight += atomic_read(&zc->load);
607 pref_weight += atomic_read(&pref_zc->load);
608 if (weight == pref_weight)
609 return atomic64_read(&zc->card->total_request_count) >
610 atomic64_read(&pref_zc->card->total_request_count);
611 return weight > pref_weight;
612}
613
614static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
615 struct zcrypt_queue *pref_zq,
616 unsigned int weight,
617 unsigned int pref_weight)
618{
619 if (!pref_zq)
620 return false;
621 weight += atomic_read(&zq->load);
622 pref_weight += atomic_read(&pref_zq->load);
623 if (weight == pref_weight)
624 return zq->queue->total_request_count >
625 pref_zq->queue->total_request_count;
626 return weight > pref_weight;
627}
628
629/*
630 * zcrypt ioctls.
631 */
632static long zcrypt_rsa_modexpo(struct ap_perms *perms,
633 struct ica_rsa_modexpo *mex)
634{
635 struct zcrypt_card *zc, *pref_zc;
636 struct zcrypt_queue *zq, *pref_zq;
637 unsigned int weight = 0, pref_weight = 0;
638 unsigned int func_code;
639 int qid = 0, rc = -ENODEV;
640 struct module *mod;
641
642 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
643
644 if (mex->outputdatalength < mex->inputdatalength) {
645 func_code = 0;
646 rc = -EINVAL;
647 goto out;
648 }
649
650 /*
651 * As long as outputdatalength is big enough, we can set the
652 * outputdatalength equal to the inputdatalength, since that is the
653 * number of bytes we will copy in any case
654 */
655 mex->outputdatalength = mex->inputdatalength;
656
657 rc = get_rsa_modex_fc(mex, &func_code);
658 if (rc)
659 goto out;
660
661 pref_zc = NULL;
662 pref_zq = NULL;
663 spin_lock(&zcrypt_list_lock);
664 for_each_zcrypt_card(zc) {
665 /* Check for online accelarator and CCA cards */
666 if (!zc->online || !(zc->card->functions & 0x18000000))
667 continue;
668 /* Check for size limits */
669 if (zc->min_mod_size > mex->inputdatalength ||
670 zc->max_mod_size < mex->inputdatalength)
671 continue;
672 /* check if device node has admission for this card */
673 if (!zcrypt_check_card(perms, zc->card->id))
674 continue;
675 /* get weight index of the card device */
676 weight = zc->speed_rating[func_code];
677 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
678 continue;
679 for_each_zcrypt_queue(zq, zc) {
680 /* check if device is online and eligible */
681 if (!zq->online || !zq->ops->rsa_modexpo)
682 continue;
683 /* check if device node has admission for this queue */
684 if (!zcrypt_check_queue(perms,
685 AP_QID_QUEUE(zq->queue->qid)))
686 continue;
687 if (zcrypt_queue_compare(zq, pref_zq,
688 weight, pref_weight))
689 continue;
690 pref_zc = zc;
691 pref_zq = zq;
692 pref_weight = weight;
693 }
694 }
695 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
696 spin_unlock(&zcrypt_list_lock);
697
698 if (!pref_zq) {
699 rc = -ENODEV;
700 goto out;
701 }
702
703 qid = pref_zq->queue->qid;
704 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
705
706 spin_lock(&zcrypt_list_lock);
707 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
708 spin_unlock(&zcrypt_list_lock);
709
710out:
711 trace_s390_zcrypt_rep(mex, func_code, rc,
712 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
713 return rc;
714}
715
716static long zcrypt_rsa_crt(struct ap_perms *perms,
717 struct ica_rsa_modexpo_crt *crt)
718{
719 struct zcrypt_card *zc, *pref_zc;
720 struct zcrypt_queue *zq, *pref_zq;
721 unsigned int weight = 0, pref_weight = 0;
722 unsigned int func_code;
723 int qid = 0, rc = -ENODEV;
724 struct module *mod;
725
726 trace_s390_zcrypt_req(crt, TP_ICARSACRT);
727
728 if (crt->outputdatalength < crt->inputdatalength) {
729 func_code = 0;
730 rc = -EINVAL;
731 goto out;
732 }
733
734 /*
735 * As long as outputdatalength is big enough, we can set the
736 * outputdatalength equal to the inputdatalength, since that is the
737 * number of bytes we will copy in any case
738 */
739 crt->outputdatalength = crt->inputdatalength;
740
741 rc = get_rsa_crt_fc(crt, &func_code);
742 if (rc)
743 goto out;
744
745 pref_zc = NULL;
746 pref_zq = NULL;
747 spin_lock(&zcrypt_list_lock);
748 for_each_zcrypt_card(zc) {
749 /* Check for online accelarator and CCA cards */
750 if (!zc->online || !(zc->card->functions & 0x18000000))
751 continue;
752 /* Check for size limits */
753 if (zc->min_mod_size > crt->inputdatalength ||
754 zc->max_mod_size < crt->inputdatalength)
755 continue;
756 /* check if device node has admission for this card */
757 if (!zcrypt_check_card(perms, zc->card->id))
758 continue;
759 /* get weight index of the card device */
760 weight = zc->speed_rating[func_code];
761 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
762 continue;
763 for_each_zcrypt_queue(zq, zc) {
764 /* check if device is online and eligible */
765 if (!zq->online || !zq->ops->rsa_modexpo_crt)
766 continue;
767 /* check if device node has admission for this queue */
768 if (!zcrypt_check_queue(perms,
769 AP_QID_QUEUE(zq->queue->qid)))
770 continue;
771 if (zcrypt_queue_compare(zq, pref_zq,
772 weight, pref_weight))
773 continue;
774 pref_zc = zc;
775 pref_zq = zq;
776 pref_weight = weight;
777 }
778 }
779 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
780 spin_unlock(&zcrypt_list_lock);
781
782 if (!pref_zq) {
783 rc = -ENODEV;
784 goto out;
785 }
786
787 qid = pref_zq->queue->qid;
788 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
789
790 spin_lock(&zcrypt_list_lock);
791 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
792 spin_unlock(&zcrypt_list_lock);
793
794out:
795 trace_s390_zcrypt_rep(crt, func_code, rc,
796 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
797 return rc;
798}
799
800static long _zcrypt_send_cprb(struct ap_perms *perms,
801 struct ica_xcRB *xcRB)
802{
803 struct zcrypt_card *zc, *pref_zc;
804 struct zcrypt_queue *zq, *pref_zq;
805 struct ap_message ap_msg;
806 unsigned int weight = 0, pref_weight = 0;
807 unsigned int func_code;
808 unsigned short *domain, tdom;
809 int qid = 0, rc = -ENODEV;
810 struct module *mod;
811
812 trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
813
814 xcRB->status = 0;
815 ap_init_message(&ap_msg);
816 rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
817 if (rc)
818 goto out;
819
820 /*
821 * If a valid target domain is set and this domain is NOT a usage
822 * domain but a control only domain, use the default domain as target.
823 */
824 tdom = *domain;
825 if (tdom < AP_DOMAINS &&
826 !ap_test_config_usage_domain(tdom) &&
827 ap_test_config_ctrl_domain(tdom) &&
828 ap_domain_index >= 0)
829 tdom = ap_domain_index;
830
831 pref_zc = NULL;
832 pref_zq = NULL;
833 spin_lock(&zcrypt_list_lock);
834 for_each_zcrypt_card(zc) {
835 /* Check for online CCA cards */
836 if (!zc->online || !(zc->card->functions & 0x10000000))
837 continue;
838 /* Check for user selected CCA card */
839 if (xcRB->user_defined != AUTOSELECT &&
840 xcRB->user_defined != zc->card->id)
841 continue;
842 /* check if device node has admission for this card */
843 if (!zcrypt_check_card(perms, zc->card->id))
844 continue;
845 /* get weight index of the card device */
846 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
847 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
848 continue;
849 for_each_zcrypt_queue(zq, zc) {
850 /* check if device is online and eligible */
851 if (!zq->online ||
852 !zq->ops->send_cprb ||
853 (tdom != AUTOSEL_DOM &&
854 tdom != AP_QID_QUEUE(zq->queue->qid)))
855 continue;
856 /* check if device node has admission for this queue */
857 if (!zcrypt_check_queue(perms,
858 AP_QID_QUEUE(zq->queue->qid)))
859 continue;
860 if (zcrypt_queue_compare(zq, pref_zq,
861 weight, pref_weight))
862 continue;
863 pref_zc = zc;
864 pref_zq = zq;
865 pref_weight = weight;
866 }
867 }
868 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
869 spin_unlock(&zcrypt_list_lock);
870
871 if (!pref_zq) {
872 rc = -ENODEV;
873 goto out;
874 }
875
876 /* in case of auto select, provide the correct domain */
877 qid = pref_zq->queue->qid;
878 if (*domain == AUTOSEL_DOM)
879 *domain = AP_QID_QUEUE(qid);
880
881 rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
882
883 spin_lock(&zcrypt_list_lock);
884 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
885 spin_unlock(&zcrypt_list_lock);
886
887out:
888 ap_release_message(&ap_msg);
889 trace_s390_zcrypt_rep(xcRB, func_code, rc,
890 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
891 return rc;
892}
893
894long zcrypt_send_cprb(struct ica_xcRB *xcRB)
895{
896 return _zcrypt_send_cprb(&ap_perms, xcRB);
897}
898EXPORT_SYMBOL(zcrypt_send_cprb);
899
900static bool is_desired_ep11_card(unsigned int dev_id,
901 unsigned short target_num,
902 struct ep11_target_dev *targets)
903{
904 while (target_num-- > 0) {
905 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
906 return true;
907 targets++;
908 }
909 return false;
910}
911
912static bool is_desired_ep11_queue(unsigned int dev_qid,
913 unsigned short target_num,
914 struct ep11_target_dev *targets)
915{
916 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
917
918 while (target_num-- > 0) {
919 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
920 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
921 return true;
922 targets++;
923 }
924 return false;
925}
926
927static long _zcrypt_send_ep11_cprb(struct ap_perms *perms,
928 struct ep11_urb *xcrb)
929{
930 struct zcrypt_card *zc, *pref_zc;
931 struct zcrypt_queue *zq, *pref_zq;
932 struct ep11_target_dev *targets;
933 unsigned short target_num;
934 unsigned int weight = 0, pref_weight = 0;
935 unsigned int func_code;
936 struct ap_message ap_msg;
937 int qid = 0, rc = -ENODEV;
938 struct module *mod;
939
940 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
941
942 ap_init_message(&ap_msg);
943
944 target_num = (unsigned short) xcrb->targets_num;
945
946 /* empty list indicates autoselect (all available targets) */
947 targets = NULL;
948 if (target_num != 0) {
949 struct ep11_target_dev __user *uptr;
950
951 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
952 if (!targets) {
953 func_code = 0;
954 rc = -ENOMEM;
955 goto out;
956 }
957
958 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
959 if (copy_from_user(targets, uptr,
960 target_num * sizeof(*targets))) {
961 func_code = 0;
962 rc = -EFAULT;
963 goto out_free;
964 }
965 }
966
967 rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
968 if (rc)
969 goto out_free;
970
971 pref_zc = NULL;
972 pref_zq = NULL;
973 spin_lock(&zcrypt_list_lock);
974 for_each_zcrypt_card(zc) {
975 /* Check for online EP11 cards */
976 if (!zc->online || !(zc->card->functions & 0x04000000))
977 continue;
978 /* Check for user selected EP11 card */
979 if (targets &&
980 !is_desired_ep11_card(zc->card->id, target_num, targets))
981 continue;
982 /* check if device node has admission for this card */
983 if (!zcrypt_check_card(perms, zc->card->id))
984 continue;
985 /* get weight index of the card device */
986 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
987 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
988 continue;
989 for_each_zcrypt_queue(zq, zc) {
990 /* check if device is online and eligible */
991 if (!zq->online ||
992 !zq->ops->send_ep11_cprb ||
993 (targets &&
994 !is_desired_ep11_queue(zq->queue->qid,
995 target_num, targets)))
996 continue;
997 /* check if device node has admission for this queue */
998 if (!zcrypt_check_queue(perms,
999 AP_QID_QUEUE(zq->queue->qid)))
1000 continue;
1001 if (zcrypt_queue_compare(zq, pref_zq,
1002 weight, pref_weight))
1003 continue;
1004 pref_zc = zc;
1005 pref_zq = zq;
1006 pref_weight = weight;
1007 }
1008 }
1009 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1010 spin_unlock(&zcrypt_list_lock);
1011
1012 if (!pref_zq) {
1013 rc = -ENODEV;
1014 goto out_free;
1015 }
1016
1017 qid = pref_zq->queue->qid;
1018 rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
1019
1020 spin_lock(&zcrypt_list_lock);
1021 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1022 spin_unlock(&zcrypt_list_lock);
1023
1024out_free:
1025 kfree(targets);
1026out:
1027 ap_release_message(&ap_msg);
1028 trace_s390_zcrypt_rep(xcrb, func_code, rc,
1029 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1030 return rc;
1031}
1032
1033long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1034{
1035 return _zcrypt_send_ep11_cprb(&ap_perms, xcrb);
1036}
1037EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1038
1039static long zcrypt_rng(char *buffer)
1040{
1041 struct zcrypt_card *zc, *pref_zc;
1042 struct zcrypt_queue *zq, *pref_zq;
1043 unsigned int weight = 0, pref_weight = 0;
1044 unsigned int func_code;
1045 struct ap_message ap_msg;
1046 unsigned int domain;
1047 int qid = 0, rc = -ENODEV;
1048 struct module *mod;
1049
1050 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1051
1052 ap_init_message(&ap_msg);
1053 rc = get_rng_fc(&ap_msg, &func_code, &domain);
1054 if (rc)
1055 goto out;
1056
1057 pref_zc = NULL;
1058 pref_zq = NULL;
1059 spin_lock(&zcrypt_list_lock);
1060 for_each_zcrypt_card(zc) {
1061 /* Check for online CCA cards */
1062 if (!zc->online || !(zc->card->functions & 0x10000000))
1063 continue;
1064 /* get weight index of the card device */
1065 weight = zc->speed_rating[func_code];
1066 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1067 continue;
1068 for_each_zcrypt_queue(zq, zc) {
1069 /* check if device is online and eligible */
1070 if (!zq->online || !zq->ops->rng)
1071 continue;
1072 if (zcrypt_queue_compare(zq, pref_zq,
1073 weight, pref_weight))
1074 continue;
1075 pref_zc = zc;
1076 pref_zq = zq;
1077 pref_weight = weight;
1078 }
1079 }
1080 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1081 spin_unlock(&zcrypt_list_lock);
1082
1083 if (!pref_zq) {
1084 rc = -ENODEV;
1085 goto out;
1086 }
1087
1088 qid = pref_zq->queue->qid;
1089 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1090
1091 spin_lock(&zcrypt_list_lock);
1092 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1093 spin_unlock(&zcrypt_list_lock);
1094
1095out:
1096 ap_release_message(&ap_msg);
1097 trace_s390_zcrypt_rep(buffer, func_code, rc,
1098 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1099 return rc;
1100}
1101
1102static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1103{
1104 struct zcrypt_card *zc;
1105 struct zcrypt_queue *zq;
1106 struct zcrypt_device_status *stat;
1107 int card, queue;
1108
1109 memset(devstatus, 0, MAX_ZDEV_ENTRIES
1110 * sizeof(struct zcrypt_device_status));
1111
1112 spin_lock(&zcrypt_list_lock);
1113 for_each_zcrypt_card(zc) {
1114 for_each_zcrypt_queue(zq, zc) {
1115 card = AP_QID_CARD(zq->queue->qid);
1116 if (card >= MAX_ZDEV_CARDIDS)
1117 continue;
1118 queue = AP_QID_QUEUE(zq->queue->qid);
1119 stat = &devstatus[card * AP_DOMAINS + queue];
1120 stat->hwtype = zc->card->ap_dev.device_type;
1121 stat->functions = zc->card->functions >> 26;
1122 stat->qid = zq->queue->qid;
1123 stat->online = zq->online ? 0x01 : 0x00;
1124 }
1125 }
1126 spin_unlock(&zcrypt_list_lock);
1127}
1128
1129void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1130{
1131 struct zcrypt_card *zc;
1132 struct zcrypt_queue *zq;
1133 struct zcrypt_device_status_ext *stat;
1134 int card, queue;
1135
1136 memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1137 * sizeof(struct zcrypt_device_status_ext));
1138
1139 spin_lock(&zcrypt_list_lock);
1140 for_each_zcrypt_card(zc) {
1141 for_each_zcrypt_queue(zq, zc) {
1142 card = AP_QID_CARD(zq->queue->qid);
1143 queue = AP_QID_QUEUE(zq->queue->qid);
1144 stat = &devstatus[card * AP_DOMAINS + queue];
1145 stat->hwtype = zc->card->ap_dev.device_type;
1146 stat->functions = zc->card->functions >> 26;
1147 stat->qid = zq->queue->qid;
1148 stat->online = zq->online ? 0x01 : 0x00;
1149 }
1150 }
1151 spin_unlock(&zcrypt_list_lock);
1152}
1153EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1154
1155int zcrypt_device_status_ext(int card, int queue,
1156 struct zcrypt_device_status_ext *devstat)
1157{
1158 struct zcrypt_card *zc;
1159 struct zcrypt_queue *zq;
1160
1161 memset(devstat, 0, sizeof(*devstat));
1162
1163 spin_lock(&zcrypt_list_lock);
1164 for_each_zcrypt_card(zc) {
1165 for_each_zcrypt_queue(zq, zc) {
1166 if (card == AP_QID_CARD(zq->queue->qid) &&
1167 queue == AP_QID_QUEUE(zq->queue->qid)) {
1168 devstat->hwtype = zc->card->ap_dev.device_type;
1169 devstat->functions = zc->card->functions >> 26;
1170 devstat->qid = zq->queue->qid;
1171 devstat->online = zq->online ? 0x01 : 0x00;
1172 spin_unlock(&zcrypt_list_lock);
1173 return 0;
1174 }
1175 }
1176 }
1177 spin_unlock(&zcrypt_list_lock);
1178
1179 return -ENODEV;
1180}
1181EXPORT_SYMBOL(zcrypt_device_status_ext);
1182
1183static void zcrypt_status_mask(char status[], size_t max_adapters)
1184{
1185 struct zcrypt_card *zc;
1186 struct zcrypt_queue *zq;
1187 int card;
1188
1189 memset(status, 0, max_adapters);
1190 spin_lock(&zcrypt_list_lock);
1191 for_each_zcrypt_card(zc) {
1192 for_each_zcrypt_queue(zq, zc) {
1193 card = AP_QID_CARD(zq->queue->qid);
1194 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1195 || card >= max_adapters)
1196 continue;
1197 status[card] = zc->online ? zc->user_space_type : 0x0d;
1198 }
1199 }
1200 spin_unlock(&zcrypt_list_lock);
1201}
1202
1203static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1204{
1205 struct zcrypt_card *zc;
1206 struct zcrypt_queue *zq;
1207 int card;
1208
1209 memset(qdepth, 0, max_adapters);
1210 spin_lock(&zcrypt_list_lock);
1211 local_bh_disable();
1212 for_each_zcrypt_card(zc) {
1213 for_each_zcrypt_queue(zq, zc) {
1214 card = AP_QID_CARD(zq->queue->qid);
1215 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1216 || card >= max_adapters)
1217 continue;
1218 spin_lock(&zq->queue->lock);
1219 qdepth[card] =
1220 zq->queue->pendingq_count +
1221 zq->queue->requestq_count;
1222 spin_unlock(&zq->queue->lock);
1223 }
1224 }
1225 local_bh_enable();
1226 spin_unlock(&zcrypt_list_lock);
1227}
1228
1229static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1230{
1231 struct zcrypt_card *zc;
1232 struct zcrypt_queue *zq;
1233 int card;
1234 u64 cnt;
1235
1236 memset(reqcnt, 0, sizeof(int) * max_adapters);
1237 spin_lock(&zcrypt_list_lock);
1238 local_bh_disable();
1239 for_each_zcrypt_card(zc) {
1240 for_each_zcrypt_queue(zq, zc) {
1241 card = AP_QID_CARD(zq->queue->qid);
1242 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1243 || card >= max_adapters)
1244 continue;
1245 spin_lock(&zq->queue->lock);
1246 cnt = zq->queue->total_request_count;
1247 spin_unlock(&zq->queue->lock);
1248 reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX;
1249 }
1250 }
1251 local_bh_enable();
1252 spin_unlock(&zcrypt_list_lock);
1253}
1254
1255static int zcrypt_pendingq_count(void)
1256{
1257 struct zcrypt_card *zc;
1258 struct zcrypt_queue *zq;
1259 int pendingq_count;
1260
1261 pendingq_count = 0;
1262 spin_lock(&zcrypt_list_lock);
1263 local_bh_disable();
1264 for_each_zcrypt_card(zc) {
1265 for_each_zcrypt_queue(zq, zc) {
1266 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1267 continue;
1268 spin_lock(&zq->queue->lock);
1269 pendingq_count += zq->queue->pendingq_count;
1270 spin_unlock(&zq->queue->lock);
1271 }
1272 }
1273 local_bh_enable();
1274 spin_unlock(&zcrypt_list_lock);
1275 return pendingq_count;
1276}
1277
1278static int zcrypt_requestq_count(void)
1279{
1280 struct zcrypt_card *zc;
1281 struct zcrypt_queue *zq;
1282 int requestq_count;
1283
1284 requestq_count = 0;
1285 spin_lock(&zcrypt_list_lock);
1286 local_bh_disable();
1287 for_each_zcrypt_card(zc) {
1288 for_each_zcrypt_queue(zq, zc) {
1289 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1290 continue;
1291 spin_lock(&zq->queue->lock);
1292 requestq_count += zq->queue->requestq_count;
1293 spin_unlock(&zq->queue->lock);
1294 }
1295 }
1296 local_bh_enable();
1297 spin_unlock(&zcrypt_list_lock);
1298 return requestq_count;
1299}
1300
1301static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1302{
1303 int rc;
1304 struct ica_rsa_modexpo mex;
1305 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1306
1307 if (copy_from_user(&mex, umex, sizeof(mex)))
1308 return -EFAULT;
1309 do {
1310 rc = zcrypt_rsa_modexpo(perms, &mex);
1311 } while (rc == -EAGAIN);
1312 /* on failure: retry once again after a requested rescan */
1313 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1314 do {
1315 rc = zcrypt_rsa_modexpo(perms, &mex);
1316 } while (rc == -EAGAIN);
1317 if (rc) {
1318 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1319 return rc;
1320 }
1321 return put_user(mex.outputdatalength, &umex->outputdatalength);
1322}
1323
1324static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1325{
1326 int rc;
1327 struct ica_rsa_modexpo_crt crt;
1328 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1329
1330 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1331 return -EFAULT;
1332 do {
1333 rc = zcrypt_rsa_crt(perms, &crt);
1334 } while (rc == -EAGAIN);
1335 /* on failure: retry once again after a requested rescan */
1336 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1337 do {
1338 rc = zcrypt_rsa_crt(perms, &crt);
1339 } while (rc == -EAGAIN);
1340 if (rc) {
1341 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1342 return rc;
1343 }
1344 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1345}
1346
1347static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1348{
1349 int rc;
1350 struct ica_xcRB xcRB;
1351 struct ica_xcRB __user *uxcRB = (void __user *) arg;
1352
1353 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1354 return -EFAULT;
1355 do {
1356 rc = _zcrypt_send_cprb(perms, &xcRB);
1357 } while (rc == -EAGAIN);
1358 /* on failure: retry once again after a requested rescan */
1359 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1360 do {
1361 rc = _zcrypt_send_cprb(perms, &xcRB);
1362 } while (rc == -EAGAIN);
1363 if (rc)
1364 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1365 rc, xcRB.status);
1366 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1367 return -EFAULT;
1368 return rc;
1369}
1370
1371static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1372{
1373 int rc;
1374 struct ep11_urb xcrb;
1375 struct ep11_urb __user *uxcrb = (void __user *)arg;
1376
1377 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1378 return -EFAULT;
1379 do {
1380 rc = _zcrypt_send_ep11_cprb(perms, &xcrb);
1381 } while (rc == -EAGAIN);
1382 /* on failure: retry once again after a requested rescan */
1383 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1384 do {
1385 rc = _zcrypt_send_ep11_cprb(perms, &xcrb);
1386 } while (rc == -EAGAIN);
1387 if (rc)
1388 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1389 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1390 return -EFAULT;
1391 return rc;
1392}
1393
1394static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1395 unsigned long arg)
1396{
1397 int rc;
1398 struct ap_perms *perms =
1399 (struct ap_perms *) filp->private_data;
1400
1401 rc = zcrypt_check_ioctl(perms, cmd);
1402 if (rc)
1403 return rc;
1404
1405 switch (cmd) {
1406 case ICARSAMODEXPO:
1407 return icarsamodexpo_ioctl(perms, arg);
1408 case ICARSACRT:
1409 return icarsacrt_ioctl(perms, arg);
1410 case ZSECSENDCPRB:
1411 return zsecsendcprb_ioctl(perms, arg);
1412 case ZSENDEP11CPRB:
1413 return zsendep11cprb_ioctl(perms, arg);
1414 case ZCRYPT_DEVICE_STATUS: {
1415 struct zcrypt_device_status_ext *device_status;
1416 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1417 * sizeof(struct zcrypt_device_status_ext);
1418
1419 device_status = kzalloc(total_size, GFP_KERNEL);
1420 if (!device_status)
1421 return -ENOMEM;
1422 zcrypt_device_status_mask_ext(device_status);
1423 if (copy_to_user((char __user *) arg, device_status,
1424 total_size))
1425 rc = -EFAULT;
1426 kfree(device_status);
1427 return rc;
1428 }
1429 case ZCRYPT_STATUS_MASK: {
1430 char status[AP_DEVICES];
1431
1432 zcrypt_status_mask(status, AP_DEVICES);
1433 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1434 return -EFAULT;
1435 return 0;
1436 }
1437 case ZCRYPT_QDEPTH_MASK: {
1438 char qdepth[AP_DEVICES];
1439
1440 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1441 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1442 return -EFAULT;
1443 return 0;
1444 }
1445 case ZCRYPT_PERDEV_REQCNT: {
1446 u32 *reqcnt;
1447
1448 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1449 if (!reqcnt)
1450 return -ENOMEM;
1451 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1452 if (copy_to_user((int __user *) arg, reqcnt,
1453 sizeof(u32) * AP_DEVICES))
1454 rc = -EFAULT;
1455 kfree(reqcnt);
1456 return rc;
1457 }
1458 case Z90STAT_REQUESTQ_COUNT:
1459 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1460 case Z90STAT_PENDINGQ_COUNT:
1461 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1462 case Z90STAT_TOTALOPEN_COUNT:
1463 return put_user(atomic_read(&zcrypt_open_count),
1464 (int __user *) arg);
1465 case Z90STAT_DOMAIN_INDEX:
1466 return put_user(ap_domain_index, (int __user *) arg);
1467 /*
1468 * Deprecated ioctls
1469 */
1470 case ZDEVICESTATUS: {
1471 /* the old ioctl supports only 64 adapters */
1472 struct zcrypt_device_status *device_status;
1473 size_t total_size = MAX_ZDEV_ENTRIES
1474 * sizeof(struct zcrypt_device_status);
1475
1476 device_status = kzalloc(total_size, GFP_KERNEL);
1477 if (!device_status)
1478 return -ENOMEM;
1479 zcrypt_device_status_mask(device_status);
1480 if (copy_to_user((char __user *) arg, device_status,
1481 total_size))
1482 rc = -EFAULT;
1483 kfree(device_status);
1484 return rc;
1485 }
1486 case Z90STAT_STATUS_MASK: {
1487 /* the old ioctl supports only 64 adapters */
1488 char status[MAX_ZDEV_CARDIDS];
1489
1490 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1491 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1492 return -EFAULT;
1493 return 0;
1494 }
1495 case Z90STAT_QDEPTH_MASK: {
1496 /* the old ioctl supports only 64 adapters */
1497 char qdepth[MAX_ZDEV_CARDIDS];
1498
1499 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1500 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1501 return -EFAULT;
1502 return 0;
1503 }
1504 case Z90STAT_PERDEV_REQCNT: {
1505 /* the old ioctl supports only 64 adapters */
1506 u32 reqcnt[MAX_ZDEV_CARDIDS];
1507
1508 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1509 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1510 return -EFAULT;
1511 return 0;
1512 }
1513 /* unknown ioctl number */
1514 default:
1515 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1516 return -ENOIOCTLCMD;
1517 }
1518}
1519
1520#ifdef CONFIG_COMPAT
1521/*
1522 * ioctl32 conversion routines
1523 */
1524struct compat_ica_rsa_modexpo {
1525 compat_uptr_t inputdata;
1526 unsigned int inputdatalength;
1527 compat_uptr_t outputdata;
1528 unsigned int outputdatalength;
1529 compat_uptr_t b_key;
1530 compat_uptr_t n_modulus;
1531};
1532
1533static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1534 unsigned int cmd, unsigned long arg)
1535{
1536 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1537 struct compat_ica_rsa_modexpo mex32;
1538 struct ica_rsa_modexpo mex64;
1539 long rc;
1540
1541 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1542 return -EFAULT;
1543 mex64.inputdata = compat_ptr(mex32.inputdata);
1544 mex64.inputdatalength = mex32.inputdatalength;
1545 mex64.outputdata = compat_ptr(mex32.outputdata);
1546 mex64.outputdatalength = mex32.outputdatalength;
1547 mex64.b_key = compat_ptr(mex32.b_key);
1548 mex64.n_modulus = compat_ptr(mex32.n_modulus);
1549 do {
1550 rc = zcrypt_rsa_modexpo(perms, &mex64);
1551 } while (rc == -EAGAIN);
1552 /* on failure: retry once again after a requested rescan */
1553 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1554 do {
1555 rc = zcrypt_rsa_modexpo(perms, &mex64);
1556 } while (rc == -EAGAIN);
1557 if (rc)
1558 return rc;
1559 return put_user(mex64.outputdatalength,
1560 &umex32->outputdatalength);
1561}
1562
1563struct compat_ica_rsa_modexpo_crt {
1564 compat_uptr_t inputdata;
1565 unsigned int inputdatalength;
1566 compat_uptr_t outputdata;
1567 unsigned int outputdatalength;
1568 compat_uptr_t bp_key;
1569 compat_uptr_t bq_key;
1570 compat_uptr_t np_prime;
1571 compat_uptr_t nq_prime;
1572 compat_uptr_t u_mult_inv;
1573};
1574
1575static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1576 unsigned int cmd, unsigned long arg)
1577{
1578 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1579 struct compat_ica_rsa_modexpo_crt crt32;
1580 struct ica_rsa_modexpo_crt crt64;
1581 long rc;
1582
1583 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1584 return -EFAULT;
1585 crt64.inputdata = compat_ptr(crt32.inputdata);
1586 crt64.inputdatalength = crt32.inputdatalength;
1587 crt64.outputdata = compat_ptr(crt32.outputdata);
1588 crt64.outputdatalength = crt32.outputdatalength;
1589 crt64.bp_key = compat_ptr(crt32.bp_key);
1590 crt64.bq_key = compat_ptr(crt32.bq_key);
1591 crt64.np_prime = compat_ptr(crt32.np_prime);
1592 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1593 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1594 do {
1595 rc = zcrypt_rsa_crt(perms, &crt64);
1596 } while (rc == -EAGAIN);
1597 /* on failure: retry once again after a requested rescan */
1598 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1599 do {
1600 rc = zcrypt_rsa_crt(perms, &crt64);
1601 } while (rc == -EAGAIN);
1602 if (rc)
1603 return rc;
1604 return put_user(crt64.outputdatalength,
1605 &ucrt32->outputdatalength);
1606}
1607
1608struct compat_ica_xcRB {
1609 unsigned short agent_ID;
1610 unsigned int user_defined;
1611 unsigned short request_ID;
1612 unsigned int request_control_blk_length;
1613 unsigned char padding1[16 - sizeof(compat_uptr_t)];
1614 compat_uptr_t request_control_blk_addr;
1615 unsigned int request_data_length;
1616 char padding2[16 - sizeof(compat_uptr_t)];
1617 compat_uptr_t request_data_address;
1618 unsigned int reply_control_blk_length;
1619 char padding3[16 - sizeof(compat_uptr_t)];
1620 compat_uptr_t reply_control_blk_addr;
1621 unsigned int reply_data_length;
1622 char padding4[16 - sizeof(compat_uptr_t)];
1623 compat_uptr_t reply_data_addr;
1624 unsigned short priority_window;
1625 unsigned int status;
1626} __packed;
1627
1628static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1629 unsigned int cmd, unsigned long arg)
1630{
1631 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1632 struct compat_ica_xcRB xcRB32;
1633 struct ica_xcRB xcRB64;
1634 long rc;
1635
1636 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1637 return -EFAULT;
1638 xcRB64.agent_ID = xcRB32.agent_ID;
1639 xcRB64.user_defined = xcRB32.user_defined;
1640 xcRB64.request_ID = xcRB32.request_ID;
1641 xcRB64.request_control_blk_length =
1642 xcRB32.request_control_blk_length;
1643 xcRB64.request_control_blk_addr =
1644 compat_ptr(xcRB32.request_control_blk_addr);
1645 xcRB64.request_data_length =
1646 xcRB32.request_data_length;
1647 xcRB64.request_data_address =
1648 compat_ptr(xcRB32.request_data_address);
1649 xcRB64.reply_control_blk_length =
1650 xcRB32.reply_control_blk_length;
1651 xcRB64.reply_control_blk_addr =
1652 compat_ptr(xcRB32.reply_control_blk_addr);
1653 xcRB64.reply_data_length = xcRB32.reply_data_length;
1654 xcRB64.reply_data_addr =
1655 compat_ptr(xcRB32.reply_data_addr);
1656 xcRB64.priority_window = xcRB32.priority_window;
1657 xcRB64.status = xcRB32.status;
1658 do {
1659 rc = _zcrypt_send_cprb(perms, &xcRB64);
1660 } while (rc == -EAGAIN);
1661 /* on failure: retry once again after a requested rescan */
1662 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1663 do {
1664 rc = _zcrypt_send_cprb(perms, &xcRB64);
1665 } while (rc == -EAGAIN);
1666 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1667 xcRB32.reply_data_length = xcRB64.reply_data_length;
1668 xcRB32.status = xcRB64.status;
1669 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1670 return -EFAULT;
1671 return rc;
1672}
1673
1674static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1675 unsigned long arg)
1676{
1677 int rc;
1678 struct ap_perms *perms =
1679 (struct ap_perms *) filp->private_data;
1680
1681 rc = zcrypt_check_ioctl(perms, cmd);
1682 if (rc)
1683 return rc;
1684
1685 if (cmd == ICARSAMODEXPO)
1686 return trans_modexpo32(perms, filp, cmd, arg);
1687 if (cmd == ICARSACRT)
1688 return trans_modexpo_crt32(perms, filp, cmd, arg);
1689 if (cmd == ZSECSENDCPRB)
1690 return trans_xcRB32(perms, filp, cmd, arg);
1691 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1692}
1693#endif
1694
1695/*
1696 * Misc device file operations.
1697 */
1698static const struct file_operations zcrypt_fops = {
1699 .owner = THIS_MODULE,
1700 .read = zcrypt_read,
1701 .write = zcrypt_write,
1702 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1703#ifdef CONFIG_COMPAT
1704 .compat_ioctl = zcrypt_compat_ioctl,
1705#endif
1706 .open = zcrypt_open,
1707 .release = zcrypt_release,
1708 .llseek = no_llseek,
1709};
1710
1711/*
1712 * Misc device.
1713 */
1714static struct miscdevice zcrypt_misc_device = {
1715 .minor = MISC_DYNAMIC_MINOR,
1716 .name = "z90crypt",
1717 .fops = &zcrypt_fops,
1718};
1719
1720static int zcrypt_rng_device_count;
1721static u32 *zcrypt_rng_buffer;
1722static int zcrypt_rng_buffer_index;
1723static DEFINE_MUTEX(zcrypt_rng_mutex);
1724
1725static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1726{
1727 int rc;
1728
1729 /*
1730 * We don't need locking here because the RNG API guarantees serialized
1731 * read method calls.
1732 */
1733 if (zcrypt_rng_buffer_index == 0) {
1734 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1735 /* on failure: retry once again after a requested rescan */
1736 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1737 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1738 if (rc < 0)
1739 return -EIO;
1740 zcrypt_rng_buffer_index = rc / sizeof(*data);
1741 }
1742 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1743 return sizeof(*data);
1744}
1745
1746static struct hwrng zcrypt_rng_dev = {
1747 .name = "zcrypt",
1748 .data_read = zcrypt_rng_data_read,
1749 .quality = 990,
1750};
1751
1752int zcrypt_rng_device_add(void)
1753{
1754 int rc = 0;
1755
1756 mutex_lock(&zcrypt_rng_mutex);
1757 if (zcrypt_rng_device_count == 0) {
1758 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1759 if (!zcrypt_rng_buffer) {
1760 rc = -ENOMEM;
1761 goto out;
1762 }
1763 zcrypt_rng_buffer_index = 0;
1764 if (!zcrypt_hwrng_seed)
1765 zcrypt_rng_dev.quality = 0;
1766 rc = hwrng_register(&zcrypt_rng_dev);
1767 if (rc)
1768 goto out_free;
1769 zcrypt_rng_device_count = 1;
1770 } else
1771 zcrypt_rng_device_count++;
1772 mutex_unlock(&zcrypt_rng_mutex);
1773 return 0;
1774
1775out_free:
1776 free_page((unsigned long) zcrypt_rng_buffer);
1777out:
1778 mutex_unlock(&zcrypt_rng_mutex);
1779 return rc;
1780}
1781
1782void zcrypt_rng_device_remove(void)
1783{
1784 mutex_lock(&zcrypt_rng_mutex);
1785 zcrypt_rng_device_count--;
1786 if (zcrypt_rng_device_count == 0) {
1787 hwrng_unregister(&zcrypt_rng_dev);
1788 free_page((unsigned long) zcrypt_rng_buffer);
1789 }
1790 mutex_unlock(&zcrypt_rng_mutex);
1791}
1792
1793int __init zcrypt_debug_init(void)
1794{
1795 zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1796 DBF_MAX_SPRINTF_ARGS * sizeof(long));
1797 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1798 debug_set_level(zcrypt_dbf_info, DBF_ERR);
1799
1800 return 0;
1801}
1802
1803void zcrypt_debug_exit(void)
1804{
1805 debug_unregister(zcrypt_dbf_info);
1806}
1807
1808#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1809
1810static int __init zcdn_init(void)
1811{
1812 int rc;
1813
1814 /* create a new class 'zcrypt' */
1815 zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
1816 if (IS_ERR(zcrypt_class)) {
1817 rc = PTR_ERR(zcrypt_class);
1818 goto out_class_create_failed;
1819 }
1820 zcrypt_class->dev_release = zcdn_device_release;
1821
1822 /* alloc device minor range */
1823 rc = alloc_chrdev_region(&zcrypt_devt,
1824 0, ZCRYPT_MAX_MINOR_NODES,
1825 ZCRYPT_NAME);
1826 if (rc)
1827 goto out_alloc_chrdev_failed;
1828
1829 cdev_init(&zcrypt_cdev, &zcrypt_fops);
1830 zcrypt_cdev.owner = THIS_MODULE;
1831 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1832 if (rc)
1833 goto out_cdev_add_failed;
1834
1835 /* need some class specific sysfs attributes */
1836 rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
1837 if (rc)
1838 goto out_class_create_file_1_failed;
1839 rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
1840 if (rc)
1841 goto out_class_create_file_2_failed;
1842
1843 return 0;
1844
1845out_class_create_file_2_failed:
1846 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1847out_class_create_file_1_failed:
1848 cdev_del(&zcrypt_cdev);
1849out_cdev_add_failed:
1850 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1851out_alloc_chrdev_failed:
1852 class_destroy(zcrypt_class);
1853out_class_create_failed:
1854 return rc;
1855}
1856
1857static void zcdn_exit(void)
1858{
1859 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1860 class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
1861 zcdn_destroy_all();
1862 cdev_del(&zcrypt_cdev);
1863 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1864 class_destroy(zcrypt_class);
1865}
1866
1867#endif
1868
1869/**
1870 * zcrypt_api_init(): Module initialization.
1871 *
1872 * The module initialization code.
1873 */
1874int __init zcrypt_api_init(void)
1875{
1876 int rc;
1877
1878 rc = zcrypt_debug_init();
1879 if (rc)
1880 goto out;
1881
1882#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1883 rc = zcdn_init();
1884 if (rc)
1885 goto out;
1886#endif
1887
1888 /* Register the request sprayer. */
1889 rc = misc_register(&zcrypt_misc_device);
1890 if (rc < 0)
1891 goto out_misc_register_failed;
1892
1893 zcrypt_msgtype6_init();
1894 zcrypt_msgtype50_init();
1895
1896 return 0;
1897
1898out_misc_register_failed:
1899#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1900 zcdn_exit();
1901#endif
1902 zcrypt_debug_exit();
1903out:
1904 return rc;
1905}
1906
1907/**
1908 * zcrypt_api_exit(): Module termination.
1909 *
1910 * The module termination code.
1911 */
1912void __exit zcrypt_api_exit(void)
1913{
1914#ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1915 zcdn_exit();
1916#endif
1917 misc_deregister(&zcrypt_misc_device);
1918 zcrypt_msgtype6_exit();
1919 zcrypt_msgtype50_exit();
1920 zcrypt_ccamisc_exit();
1921 zcrypt_ep11misc_exit();
1922 zcrypt_debug_exit();
1923}
1924
1925module_init(zcrypt_api_init);
1926module_exit(zcrypt_api_exit);