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