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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / s390 / crypto / zcrypt_api.c
blob56a405dce8bcf32c468443d5249ce466285d999c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright IBM Corp. 2001, 2018
4 * Author(s): Robert Burroughs
5 * Eric Rossman (edrossma@us.ibm.com)
6 * Cornelia Huck <cornelia.huck@de.ibm.com>
7 *
8 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
9 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
10 * Ralph Wuerthner <rwuerthn@de.ibm.com>
11 * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
12 * Multiple device nodes: Harald Freudenberger <freude@linux.ibm.com>
13 */
14
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/interrupt.h>
18 #include <linux/miscdevice.h>
19 #include <linux/fs.h>
20 #include <linux/compat.h>
21 #include <linux/slab.h>
22 #include <linux/atomic.h>
23 #include <linux/uaccess.h>
24 #include <linux/hw_random.h>
25 #include <linux/debugfs.h>
26 #include <linux/cdev.h>
27 #include <linux/ctype.h>
28 #include <asm/debug.h>
29
30 #define CREATE_TRACE_POINTS
31 #include <asm/trace/zcrypt.h>
32
33 #include "zcrypt_api.h"
34 #include "zcrypt_debug.h"
35
36 #include "zcrypt_msgtype6.h"
37 #include "zcrypt_msgtype50.h"
38 #include "zcrypt_ccamisc.h"
39 #include "zcrypt_ep11misc.h"
40
41 /*
42 * Module description.
43 */
44 MODULE_AUTHOR("IBM Corporation");
45 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
46 "Copyright IBM Corp. 2001, 2012");
47 MODULE_LICENSE("GPL");
48
49 /*
50 * zcrypt tracepoint functions
51 */
52 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
53 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
54
55 static int zcrypt_hwrng_seed = 1;
56 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
57 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
58
59 DEFINE_SPINLOCK(zcrypt_list_lock);
60 LIST_HEAD(zcrypt_card_list);
61 int zcrypt_device_count;
62
63 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
64 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
65
66 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
67 EXPORT_SYMBOL(zcrypt_rescan_req);
68
69 static LIST_HEAD(zcrypt_ops_list);
70
71 /* Zcrypt related debug feature stuff. */
72 debug_info_t *zcrypt_dbf_info;
73
74 /**
75 * Process a rescan of the transport layer.
76 *
77 * Returns 1, if the rescan has been processed, otherwise 0.
78 */
79 static inline int zcrypt_process_rescan(void)
80 {
81 if (atomic_read(&zcrypt_rescan_req)) {
82 atomic_set(&zcrypt_rescan_req, 0);
83 atomic_inc(&zcrypt_rescan_count);
84 ap_bus_force_rescan();
85 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
86 atomic_inc_return(&zcrypt_rescan_count));
87 return 1;
88 }
89 return 0;
90 }
91
92 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
93 {
94 list_add_tail(&zops->list, &zcrypt_ops_list);
95 }
96
97 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
98 {
99 list_del_init(&zops->list);
100 }
101
102 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
103 {
104 struct zcrypt_ops *zops;
105
106 list_for_each_entry(zops, &zcrypt_ops_list, list)
107 if ((zops->variant == variant) &&
108 (!strncmp(zops->name, name, sizeof(zops->name))))
109 return zops;
110 return NULL;
111 }
112 EXPORT_SYMBOL(zcrypt_msgtype);
113
114 /*
115 * Multi device nodes extension functions.
116 */
117
118 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
119
120 struct zcdn_device;
121
122 static struct class *zcrypt_class;
123 static dev_t zcrypt_devt;
124 static struct cdev zcrypt_cdev;
125
126 struct zcdn_device {
127 struct device device;
128 struct ap_perms perms;
129 };
130
131 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
132
133 #define ZCDN_MAX_NAME 32
134
135 static int zcdn_create(const char *name);
136 static int zcdn_destroy(const char *name);
137
138 /*
139 * Find zcdn device by name.
140 * Returns reference to the zcdn device which needs to be released
141 * with put_device() after use.
142 */
143 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
144 {
145 struct device *dev = class_find_device_by_name(zcrypt_class, name);
146
147 return dev ? to_zcdn_dev(dev) : NULL;
148 }
149
150 /*
151 * Find zcdn device by devt value.
152 * Returns reference to the zcdn device which needs to be released
153 * with put_device() after use.
154 */
155 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
156 {
157 struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
158
159 return dev ? to_zcdn_dev(dev) : NULL;
160 }
161
162 static ssize_t ioctlmask_show(struct device *dev,
163 struct device_attribute *attr,
164 char *buf)
165 {
166 int i, rc;
167 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
168
169 if (mutex_lock_interruptible(&ap_perms_mutex))
170 return -ERESTARTSYS;
171
172 buf[0] = '0';
173 buf[1] = 'x';
174 for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
175 snprintf(buf + 2 + 2 * i * sizeof(long),
176 PAGE_SIZE - 2 - 2 * i * sizeof(long),
177 "%016lx", zcdndev->perms.ioctlm[i]);
178 buf[2 + 2 * i * sizeof(long)] = '\n';
179 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
180 rc = 2 + 2 * i * sizeof(long) + 1;
181
182 mutex_unlock(&ap_perms_mutex);
183
184 return rc;
185 }
186
187 static ssize_t ioctlmask_store(struct device *dev,
188 struct device_attribute *attr,
189 const char *buf, size_t count)
190 {
191 int rc;
192 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
193
194 rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
195 AP_IOCTLS, &ap_perms_mutex);
196 if (rc)
197 return rc;
198
199 return count;
200 }
201
202 static DEVICE_ATTR_RW(ioctlmask);
203
204 static ssize_t apmask_show(struct device *dev,
205 struct device_attribute *attr,
206 char *buf)
207 {
208 int i, rc;
209 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
210
211 if (mutex_lock_interruptible(&ap_perms_mutex))
212 return -ERESTARTSYS;
213
214 buf[0] = '0';
215 buf[1] = 'x';
216 for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
217 snprintf(buf + 2 + 2 * i * sizeof(long),
218 PAGE_SIZE - 2 - 2 * i * sizeof(long),
219 "%016lx", zcdndev->perms.apm[i]);
220 buf[2 + 2 * i * sizeof(long)] = '\n';
221 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
222 rc = 2 + 2 * i * sizeof(long) + 1;
223
224 mutex_unlock(&ap_perms_mutex);
225
226 return rc;
227 }
228
229 static ssize_t apmask_store(struct device *dev,
230 struct device_attribute *attr,
231 const char *buf, size_t count)
232 {
233 int rc;
234 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
235
236 rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
237 AP_DEVICES, &ap_perms_mutex);
238 if (rc)
239 return rc;
240
241 return count;
242 }
243
244 static DEVICE_ATTR_RW(apmask);
245
246 static ssize_t aqmask_show(struct device *dev,
247 struct device_attribute *attr,
248 char *buf)
249 {
250 int i, rc;
251 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
252
253 if (mutex_lock_interruptible(&ap_perms_mutex))
254 return -ERESTARTSYS;
255
256 buf[0] = '0';
257 buf[1] = 'x';
258 for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
259 snprintf(buf + 2 + 2 * i * sizeof(long),
260 PAGE_SIZE - 2 - 2 * i * sizeof(long),
261 "%016lx", zcdndev->perms.aqm[i]);
262 buf[2 + 2 * i * sizeof(long)] = '\n';
263 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
264 rc = 2 + 2 * i * sizeof(long) + 1;
265
266 mutex_unlock(&ap_perms_mutex);
267
268 return rc;
269 }
270
271 static ssize_t aqmask_store(struct device *dev,
272 struct device_attribute *attr,
273 const char *buf, size_t count)
274 {
275 int rc;
276 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
277
278 rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
279 AP_DOMAINS, &ap_perms_mutex);
280 if (rc)
281 return rc;
282
283 return count;
284 }
285
286 static DEVICE_ATTR_RW(aqmask);
287
288 static struct attribute *zcdn_dev_attrs[] = {
289 &dev_attr_ioctlmask.attr,
290 &dev_attr_apmask.attr,
291 &dev_attr_aqmask.attr,
292 NULL
293 };
294
295 static struct attribute_group zcdn_dev_attr_group = {
296 .attrs = zcdn_dev_attrs
297 };
298
299 static const struct attribute_group *zcdn_dev_attr_groups[] = {
300 &zcdn_dev_attr_group,
301 NULL
302 };
303
304 static ssize_t zcdn_create_store(struct class *class,
305 struct class_attribute *attr,
306 const char *buf, size_t count)
307 {
308 int rc;
309 char name[ZCDN_MAX_NAME];
310
311 strncpy(name, skip_spaces(buf), sizeof(name));
312 name[sizeof(name) - 1] = '\0';
313
314 rc = zcdn_create(strim(name));
315
316 return rc ? rc : count;
317 }
318
319 static const struct class_attribute class_attr_zcdn_create =
320 __ATTR(create, 0600, NULL, zcdn_create_store);
321
322 static ssize_t zcdn_destroy_store(struct class *class,
323 struct class_attribute *attr,
324 const char *buf, size_t count)
325 {
326 int rc;
327 char name[ZCDN_MAX_NAME];
328
329 strncpy(name, skip_spaces(buf), sizeof(name));
330 name[sizeof(name) - 1] = '\0';
331
332 rc = zcdn_destroy(strim(name));
333
334 return rc ? rc : count;
335 }
336
337 static const struct class_attribute class_attr_zcdn_destroy =
338 __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
339
340 static void zcdn_device_release(struct device *dev)
341 {
342 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
343
344 ZCRYPT_DBF(DBF_INFO, "releasing zcdn device %d:%d\n",
345 MAJOR(dev->devt), MINOR(dev->devt));
346
347 kfree(zcdndev);
348 }
349
350 static int zcdn_create(const char *name)
351 {
352 dev_t devt;
353 int i, rc = 0;
354 char nodename[ZCDN_MAX_NAME];
355 struct zcdn_device *zcdndev;
356
357 if (mutex_lock_interruptible(&ap_perms_mutex))
358 return -ERESTARTSYS;
359
360 /* check if device node with this name already exists */
361 if (name[0]) {
362 zcdndev = find_zcdndev_by_name(name);
363 if (zcdndev) {
364 put_device(&zcdndev->device);
365 rc = -EEXIST;
366 goto unlockout;
367 }
368 }
369
370 /* find an unused minor number */
371 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
372 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
373 zcdndev = find_zcdndev_by_devt(devt);
374 if (zcdndev)
375 put_device(&zcdndev->device);
376 else
377 break;
378 }
379 if (i == ZCRYPT_MAX_MINOR_NODES) {
380 rc = -ENOSPC;
381 goto unlockout;
382 }
383
384 /* alloc and prepare a new zcdn device */
385 zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
386 if (!zcdndev) {
387 rc = -ENOMEM;
388 goto unlockout;
389 }
390 zcdndev->device.release = zcdn_device_release;
391 zcdndev->device.class = zcrypt_class;
392 zcdndev->device.devt = devt;
393 zcdndev->device.groups = zcdn_dev_attr_groups;
394 if (name[0])
395 strncpy(nodename, name, sizeof(nodename));
396 else
397 snprintf(nodename, sizeof(nodename),
398 ZCRYPT_NAME "_%d", (int) MINOR(devt));
399 nodename[sizeof(nodename)-1] = '\0';
400 if (dev_set_name(&zcdndev->device, nodename)) {
401 rc = -EINVAL;
402 goto unlockout;
403 }
404 rc = device_register(&zcdndev->device);
405 if (rc) {
406 put_device(&zcdndev->device);
407 goto unlockout;
408 }
409
410 ZCRYPT_DBF(DBF_INFO, "created zcdn device %d:%d\n",
411 MAJOR(devt), MINOR(devt));
412
413 unlockout:
414 mutex_unlock(&ap_perms_mutex);
415 return rc;
416 }
417
418 static int zcdn_destroy(const char *name)
419 {
420 int rc = 0;
421 struct zcdn_device *zcdndev;
422
423 if (mutex_lock_interruptible(&ap_perms_mutex))
424 return -ERESTARTSYS;
425
426 /* try to find this zcdn device */
427 zcdndev = find_zcdndev_by_name(name);
428 if (!zcdndev) {
429 rc = -ENOENT;
430 goto unlockout;
431 }
432
433 /*
434 * The zcdn device is not hard destroyed. It is subject to
435 * reference counting and thus just needs to be unregistered.
436 */
437 put_device(&zcdndev->device);
438 device_unregister(&zcdndev->device);
439
440 unlockout:
441 mutex_unlock(&ap_perms_mutex);
442 return rc;
443 }
444
445 static void zcdn_destroy_all(void)
446 {
447 int i;
448 dev_t devt;
449 struct zcdn_device *zcdndev;
450
451 mutex_lock(&ap_perms_mutex);
452 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
453 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
454 zcdndev = find_zcdndev_by_devt(devt);
455 if (zcdndev) {
456 put_device(&zcdndev->device);
457 device_unregister(&zcdndev->device);
458 }
459 }
460 mutex_unlock(&ap_perms_mutex);
461 }
462
463 #endif
464
465 /**
466 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
467 *
468 * This function is not supported beyond zcrypt 1.3.1.
469 */
470 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
471 size_t count, loff_t *f_pos)
472 {
473 return -EPERM;
474 }
475
476 /**
477 * zcrypt_write(): Not allowed.
478 *
479 * Write is is not allowed
480 */
481 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
482 size_t count, loff_t *f_pos)
483 {
484 return -EPERM;
485 }
486
487 /**
488 * zcrypt_open(): Count number of users.
489 *
490 * Device open function to count number of users.
491 */
492 static int zcrypt_open(struct inode *inode, struct file *filp)
493 {
494 struct ap_perms *perms = &ap_perms;
495
496 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
497 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
498 struct zcdn_device *zcdndev;
499
500 if (mutex_lock_interruptible(&ap_perms_mutex))
501 return -ERESTARTSYS;
502 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
503 /* find returns a reference, no get_device() needed */
504 mutex_unlock(&ap_perms_mutex);
505 if (zcdndev)
506 perms = &zcdndev->perms;
507 }
508 #endif
509 filp->private_data = (void *) perms;
510
511 atomic_inc(&zcrypt_open_count);
512 return stream_open(inode, filp);
513 }
514
515 /**
516 * zcrypt_release(): Count number of users.
517 *
518 * Device close function to count number of users.
519 */
520 static int zcrypt_release(struct inode *inode, struct file *filp)
521 {
522 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
523 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
524 struct zcdn_device *zcdndev;
525
526 mutex_lock(&ap_perms_mutex);
527 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
528 mutex_unlock(&ap_perms_mutex);
529 if (zcdndev) {
530 /* 2 puts here: one for find, one for open */
531 put_device(&zcdndev->device);
532 put_device(&zcdndev->device);
533 }
534 }
535 #endif
536
537 atomic_dec(&zcrypt_open_count);
538 return 0;
539 }
540
541 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
542 unsigned int cmd)
543 {
544 int rc = -EPERM;
545 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
546
547 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
548 if (test_bit_inv(ioctlnr, perms->ioctlm))
549 rc = 0;
550 }
551
552 if (rc)
553 ZCRYPT_DBF(DBF_WARN,
554 "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
555 ioctlnr, rc);
556
557 return rc;
558 }
559
560 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
561 {
562 return test_bit_inv(card, perms->apm) ? true : false;
563 }
564
565 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
566 {
567 return test_bit_inv(queue, perms->aqm) ? true : false;
568 }
569
570 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
571 struct zcrypt_queue *zq,
572 struct module **pmod,
573 unsigned int weight)
574 {
575 if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
576 return NULL;
577 zcrypt_queue_get(zq);
578 get_device(&zq->queue->ap_dev.device);
579 atomic_add(weight, &zc->load);
580 atomic_add(weight, &zq->load);
581 zq->request_count++;
582 *pmod = zq->queue->ap_dev.drv->driver.owner;
583 return zq;
584 }
585
586 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
587 struct zcrypt_queue *zq,
588 struct module *mod,
589 unsigned int weight)
590 {
591 zq->request_count--;
592 atomic_sub(weight, &zc->load);
593 atomic_sub(weight, &zq->load);
594 put_device(&zq->queue->ap_dev.device);
595 zcrypt_queue_put(zq);
596 module_put(mod);
597 }
598
599 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
600 struct zcrypt_card *pref_zc,
601 unsigned int weight,
602 unsigned int pref_weight)
603 {
604 if (!pref_zc)
605 return false;
606 weight += atomic_read(&zc->load);
607 pref_weight += atomic_read(&pref_zc->load);
608 if (weight == pref_weight)
609 return atomic64_read(&zc->card->total_request_count) >
610 atomic64_read(&pref_zc->card->total_request_count);
611 return weight > pref_weight;
612 }
613
614 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
615 struct zcrypt_queue *pref_zq,
616 unsigned int weight,
617 unsigned int pref_weight)
618 {
619 if (!pref_zq)
620 return false;
621 weight += atomic_read(&zq->load);
622 pref_weight += atomic_read(&pref_zq->load);
623 if (weight == pref_weight)
624 return zq->queue->total_request_count >
625 pref_zq->queue->total_request_count;
626 return weight > pref_weight;
627 }
628
629 /*
630 * zcrypt ioctls.
631 */
632 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
633 struct ica_rsa_modexpo *mex)
634 {
635 struct zcrypt_card *zc, *pref_zc;
636 struct zcrypt_queue *zq, *pref_zq;
637 unsigned int weight, pref_weight;
638 unsigned int func_code;
639 int qid = 0, rc = -ENODEV;
640 struct module *mod;
641
642 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
643
644 if (mex->outputdatalength < mex->inputdatalength) {
645 func_code = 0;
646 rc = -EINVAL;
647 goto out;
648 }
649
650 /*
651 * As long as outputdatalength is big enough, we can set the
652 * outputdatalength equal to the inputdatalength, since that is the
653 * number of bytes we will copy in any case
654 */
655 mex->outputdatalength = mex->inputdatalength;
656
657 rc = get_rsa_modex_fc(mex, &func_code);
658 if (rc)
659 goto out;
660
661 pref_zc = NULL;
662 pref_zq = NULL;
663 spin_lock(&zcrypt_list_lock);
664 for_each_zcrypt_card(zc) {
665 /* Check for online accelarator and CCA cards */
666 if (!zc->online || !(zc->card->functions & 0x18000000))
667 continue;
668 /* Check for size limits */
669 if (zc->min_mod_size > mex->inputdatalength ||
670 zc->max_mod_size < mex->inputdatalength)
671 continue;
672 /* check if device node has admission for this card */
673 if (!zcrypt_check_card(perms, zc->card->id))
674 continue;
675 /* get weight index of the card device */
676 weight = zc->speed_rating[func_code];
677 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
678 continue;
679 for_each_zcrypt_queue(zq, zc) {
680 /* check if device is online and eligible */
681 if (!zq->online || !zq->ops->rsa_modexpo)
682 continue;
683 /* check if device node has admission for this queue */
684 if (!zcrypt_check_queue(perms,
685 AP_QID_QUEUE(zq->queue->qid)))
686 continue;
687 if (zcrypt_queue_compare(zq, pref_zq,
688 weight, pref_weight))
689 continue;
690 pref_zc = zc;
691 pref_zq = zq;
692 pref_weight = weight;
693 }
694 }
695 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
696 spin_unlock(&zcrypt_list_lock);
697
698 if (!pref_zq) {
699 rc = -ENODEV;
700 goto out;
701 }
702
703 qid = pref_zq->queue->qid;
704 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
705
706 spin_lock(&zcrypt_list_lock);
707 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
708 spin_unlock(&zcrypt_list_lock);
709
710 out:
711 trace_s390_zcrypt_rep(mex, func_code, rc,
712 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
713 return rc;
714 }
715
716 static long zcrypt_rsa_crt(struct ap_perms *perms,
717 struct ica_rsa_modexpo_crt *crt)
718 {
719 struct zcrypt_card *zc, *pref_zc;
720 struct zcrypt_queue *zq, *pref_zq;
721 unsigned int weight, pref_weight;
722 unsigned int func_code;
723 int qid = 0, rc = -ENODEV;
724 struct module *mod;
725
726 trace_s390_zcrypt_req(crt, TP_ICARSACRT);
727
728 if (crt->outputdatalength < crt->inputdatalength) {
729 func_code = 0;
730 rc = -EINVAL;
731 goto out;
732 }
733
734 /*
735 * As long as outputdatalength is big enough, we can set the
736 * outputdatalength equal to the inputdatalength, since that is the
737 * number of bytes we will copy in any case
738 */
739 crt->outputdatalength = crt->inputdatalength;
740
741 rc = get_rsa_crt_fc(crt, &func_code);
742 if (rc)
743 goto out;
744
745 pref_zc = NULL;
746 pref_zq = NULL;
747 spin_lock(&zcrypt_list_lock);
748 for_each_zcrypt_card(zc) {
749 /* Check for online accelarator and CCA cards */
750 if (!zc->online || !(zc->card->functions & 0x18000000))
751 continue;
752 /* Check for size limits */
753 if (zc->min_mod_size > crt->inputdatalength ||
754 zc->max_mod_size < crt->inputdatalength)
755 continue;
756 /* check if device node has admission for this card */
757 if (!zcrypt_check_card(perms, zc->card->id))
758 continue;
759 /* get weight index of the card device */
760 weight = zc->speed_rating[func_code];
761 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
762 continue;
763 for_each_zcrypt_queue(zq, zc) {
764 /* check if device is online and eligible */
765 if (!zq->online || !zq->ops->rsa_modexpo_crt)
766 continue;
767 /* check if device node has admission for this queue */
768 if (!zcrypt_check_queue(perms,
769 AP_QID_QUEUE(zq->queue->qid)))
770 continue;
771 if (zcrypt_queue_compare(zq, pref_zq,
772 weight, pref_weight))
773 continue;
774 pref_zc = zc;
775 pref_zq = zq;
776 pref_weight = weight;
777 }
778 }
779 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
780 spin_unlock(&zcrypt_list_lock);
781
782 if (!pref_zq) {
783 rc = -ENODEV;
784 goto out;
785 }
786
787 qid = pref_zq->queue->qid;
788 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
789
790 spin_lock(&zcrypt_list_lock);
791 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
792 spin_unlock(&zcrypt_list_lock);
793
794 out:
795 trace_s390_zcrypt_rep(crt, func_code, rc,
796 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
797 return rc;
798 }
799
800 static long _zcrypt_send_cprb(struct ap_perms *perms,
801 struct ica_xcRB *xcRB)
802 {
803 struct zcrypt_card *zc, *pref_zc;
804 struct zcrypt_queue *zq, *pref_zq;
805 struct ap_message ap_msg;
806 unsigned int weight, pref_weight;
807 unsigned int func_code;
808 unsigned short *domain, tdom;
809 int qid = 0, rc = -ENODEV;
810 struct module *mod;
811
812 trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
813
814 xcRB->status = 0;
815 ap_init_message(&ap_msg);
816 rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
817 if (rc)
818 goto out;
819
820 /*
821 * If a valid target domain is set and this domain is NOT a usage
822 * domain but a control only domain, use the default domain as target.
823 */
824 tdom = *domain;
825 if (tdom >= 0 && tdom < AP_DOMAINS &&
826 !ap_test_config_usage_domain(tdom) &&
827 ap_test_config_ctrl_domain(tdom) &&
828 ap_domain_index >= 0)
829 tdom = ap_domain_index;
830
831 pref_zc = NULL;
832 pref_zq = NULL;
833 spin_lock(&zcrypt_list_lock);
834 for_each_zcrypt_card(zc) {
835 /* Check for online CCA cards */
836 if (!zc->online || !(zc->card->functions & 0x10000000))
837 continue;
838 /* Check for user selected CCA card */
839 if (xcRB->user_defined != AUTOSELECT &&
840 xcRB->user_defined != zc->card->id)
841 continue;
842 /* check if device node has admission for this card */
843 if (!zcrypt_check_card(perms, zc->card->id))
844 continue;
845 /* get weight index of the card device */
846 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
847 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
848 continue;
849 for_each_zcrypt_queue(zq, zc) {
850 /* check if device is online and eligible */
851 if (!zq->online ||
852 !zq->ops->send_cprb ||
853 (tdom != AUTOSEL_DOM &&
854 tdom != AP_QID_QUEUE(zq->queue->qid)))
855 continue;
856 /* check if device node has admission for this queue */
857 if (!zcrypt_check_queue(perms,
858 AP_QID_QUEUE(zq->queue->qid)))
859 continue;
860 if (zcrypt_queue_compare(zq, pref_zq,
861 weight, pref_weight))
862 continue;
863 pref_zc = zc;
864 pref_zq = zq;
865 pref_weight = weight;
866 }
867 }
868 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
869 spin_unlock(&zcrypt_list_lock);
870
871 if (!pref_zq) {
872 rc = -ENODEV;
873 goto out;
874 }
875
876 /* in case of auto select, provide the correct domain */
877 qid = pref_zq->queue->qid;
878 if (*domain == AUTOSEL_DOM)
879 *domain = AP_QID_QUEUE(qid);
880
881 rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
882
883 spin_lock(&zcrypt_list_lock);
884 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
885 spin_unlock(&zcrypt_list_lock);
886
887 out:
888 ap_release_message(&ap_msg);
889 trace_s390_zcrypt_rep(xcRB, func_code, rc,
890 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
891 return rc;
892 }
893
894 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
895 {
896 return _zcrypt_send_cprb(&ap_perms, xcRB);
897 }
898 EXPORT_SYMBOL(zcrypt_send_cprb);
899
900 static bool is_desired_ep11_card(unsigned int dev_id,
901 unsigned short target_num,
902 struct ep11_target_dev *targets)
903 {
904 while (target_num-- > 0) {
905 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
906 return true;
907 targets++;
908 }
909 return false;
910 }
911
912 static bool is_desired_ep11_queue(unsigned int dev_qid,
913 unsigned short target_num,
914 struct ep11_target_dev *targets)
915 {
916 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
917
918 while (target_num-- > 0) {
919 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
920 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
921 return true;
922 targets++;
923 }
924 return false;
925 }
926
927 static long _zcrypt_send_ep11_cprb(struct ap_perms *perms,
928 struct ep11_urb *xcrb)
929 {
930 struct zcrypt_card *zc, *pref_zc;
931 struct zcrypt_queue *zq, *pref_zq;
932 struct ep11_target_dev *targets;
933 unsigned short target_num;
934 unsigned int weight, pref_weight;
935 unsigned int func_code;
936 struct ap_message ap_msg;
937 int qid = 0, rc = -ENODEV;
938 struct module *mod;
939
940 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
941
942 ap_init_message(&ap_msg);
943
944 target_num = (unsigned short) xcrb->targets_num;
945
946 /* empty list indicates autoselect (all available targets) */
947 targets = NULL;
948 if (target_num != 0) {
949 struct ep11_target_dev __user *uptr;
950
951 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
952 if (!targets) {
953 func_code = 0;
954 rc = -ENOMEM;
955 goto out;
956 }
957
958 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
959 if (copy_from_user(targets, uptr,
960 target_num * sizeof(*targets))) {
961 func_code = 0;
962 rc = -EFAULT;
963 goto out_free;
964 }
965 }
966
967 rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
968 if (rc)
969 goto out_free;
970
971 pref_zc = NULL;
972 pref_zq = NULL;
973 spin_lock(&zcrypt_list_lock);
974 for_each_zcrypt_card(zc) {
975 /* Check for online EP11 cards */
976 if (!zc->online || !(zc->card->functions & 0x04000000))
977 continue;
978 /* Check for user selected EP11 card */
979 if (targets &&
980 !is_desired_ep11_card(zc->card->id, target_num, targets))
981 continue;
982 /* check if device node has admission for this card */
983 if (!zcrypt_check_card(perms, zc->card->id))
984 continue;
985 /* get weight index of the card device */
986 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
987 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
988 continue;
989 for_each_zcrypt_queue(zq, zc) {
990 /* check if device is online and eligible */
991 if (!zq->online ||
992 !zq->ops->send_ep11_cprb ||
993 (targets &&
994 !is_desired_ep11_queue(zq->queue->qid,
995 target_num, targets)))
996 continue;
997 /* check if device node has admission for this queue */
998 if (!zcrypt_check_queue(perms,
999 AP_QID_QUEUE(zq->queue->qid)))
1000 continue;
1001 if (zcrypt_queue_compare(zq, pref_zq,
1002 weight, pref_weight))
1003 continue;
1004 pref_zc = zc;
1005 pref_zq = zq;
1006 pref_weight = weight;
1007 }
1008 }
1009 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1010 spin_unlock(&zcrypt_list_lock);
1011
1012 if (!pref_zq) {
1013 rc = -ENODEV;
1014 goto out_free;
1015 }
1016
1017 qid = pref_zq->queue->qid;
1018 rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
1019
1020 spin_lock(&zcrypt_list_lock);
1021 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1022 spin_unlock(&zcrypt_list_lock);
1023
1024 out_free:
1025 kfree(targets);
1026 out:
1027 ap_release_message(&ap_msg);
1028 trace_s390_zcrypt_rep(xcrb, func_code, rc,
1029 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1030 return rc;
1031 }
1032
1033 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1034 {
1035 return _zcrypt_send_ep11_cprb(&ap_perms, xcrb);
1036 }
1037 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1038
1039 static long zcrypt_rng(char *buffer)
1040 {
1041 struct zcrypt_card *zc, *pref_zc;
1042 struct zcrypt_queue *zq, *pref_zq;
1043 unsigned int weight, pref_weight;
1044 unsigned int func_code;
1045 struct ap_message ap_msg;
1046 unsigned int domain;
1047 int qid = 0, rc = -ENODEV;
1048 struct module *mod;
1049
1050 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1051
1052 ap_init_message(&ap_msg);
1053 rc = get_rng_fc(&ap_msg, &func_code, &domain);
1054 if (rc)
1055 goto out;
1056
1057 pref_zc = NULL;
1058 pref_zq = NULL;
1059 spin_lock(&zcrypt_list_lock);
1060 for_each_zcrypt_card(zc) {
1061 /* Check for online CCA cards */
1062 if (!zc->online || !(zc->card->functions & 0x10000000))
1063 continue;
1064 /* get weight index of the card device */
1065 weight = zc->speed_rating[func_code];
1066 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1067 continue;
1068 for_each_zcrypt_queue(zq, zc) {
1069 /* check if device is online and eligible */
1070 if (!zq->online || !zq->ops->rng)
1071 continue;
1072 if (zcrypt_queue_compare(zq, pref_zq,
1073 weight, pref_weight))
1074 continue;
1075 pref_zc = zc;
1076 pref_zq = zq;
1077 pref_weight = weight;
1078 }
1079 }
1080 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1081 spin_unlock(&zcrypt_list_lock);
1082
1083 if (!pref_zq) {
1084 rc = -ENODEV;
1085 goto out;
1086 }
1087
1088 qid = pref_zq->queue->qid;
1089 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1090
1091 spin_lock(&zcrypt_list_lock);
1092 zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1093 spin_unlock(&zcrypt_list_lock);
1094
1095 out:
1096 ap_release_message(&ap_msg);
1097 trace_s390_zcrypt_rep(buffer, func_code, rc,
1098 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1099 return rc;
1100 }
1101
1102 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1103 {
1104 struct zcrypt_card *zc;
1105 struct zcrypt_queue *zq;
1106 struct zcrypt_device_status *stat;
1107 int card, queue;
1108
1109 memset(devstatus, 0, MAX_ZDEV_ENTRIES
1110 * sizeof(struct zcrypt_device_status));
1111
1112 spin_lock(&zcrypt_list_lock);
1113 for_each_zcrypt_card(zc) {
1114 for_each_zcrypt_queue(zq, zc) {
1115 card = AP_QID_CARD(zq->queue->qid);
1116 if (card >= MAX_ZDEV_CARDIDS)
1117 continue;
1118 queue = AP_QID_QUEUE(zq->queue->qid);
1119 stat = &devstatus[card * AP_DOMAINS + queue];
1120 stat->hwtype = zc->card->ap_dev.device_type;
1121 stat->functions = zc->card->functions >> 26;
1122 stat->qid = zq->queue->qid;
1123 stat->online = zq->online ? 0x01 : 0x00;
1124 }
1125 }
1126 spin_unlock(&zcrypt_list_lock);
1127 }
1128
1129 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1130 {
1131 struct zcrypt_card *zc;
1132 struct zcrypt_queue *zq;
1133 struct zcrypt_device_status_ext *stat;
1134 int card, queue;
1135
1136 memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1137 * sizeof(struct zcrypt_device_status_ext));
1138
1139 spin_lock(&zcrypt_list_lock);
1140 for_each_zcrypt_card(zc) {
1141 for_each_zcrypt_queue(zq, zc) {
1142 card = AP_QID_CARD(zq->queue->qid);
1143 queue = AP_QID_QUEUE(zq->queue->qid);
1144 stat = &devstatus[card * AP_DOMAINS + queue];
1145 stat->hwtype = zc->card->ap_dev.device_type;
1146 stat->functions = zc->card->functions >> 26;
1147 stat->qid = zq->queue->qid;
1148 stat->online = zq->online ? 0x01 : 0x00;
1149 }
1150 }
1151 spin_unlock(&zcrypt_list_lock);
1152 }
1153 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1154
1155 int zcrypt_device_status_ext(int card, int queue,
1156 struct zcrypt_device_status_ext *devstat)
1157 {
1158 struct zcrypt_card *zc;
1159 struct zcrypt_queue *zq;
1160
1161 memset(devstat, 0, sizeof(*devstat));
1162
1163 spin_lock(&zcrypt_list_lock);
1164 for_each_zcrypt_card(zc) {
1165 for_each_zcrypt_queue(zq, zc) {
1166 if (card == AP_QID_CARD(zq->queue->qid) &&
1167 queue == AP_QID_QUEUE(zq->queue->qid)) {
1168 devstat->hwtype = zc->card->ap_dev.device_type;
1169 devstat->functions = zc->card->functions >> 26;
1170 devstat->qid = zq->queue->qid;
1171 devstat->online = zq->online ? 0x01 : 0x00;
1172 spin_unlock(&zcrypt_list_lock);
1173 return 0;
1174 }
1175 }
1176 }
1177 spin_unlock(&zcrypt_list_lock);
1178
1179 return -ENODEV;
1180 }
1181 EXPORT_SYMBOL(zcrypt_device_status_ext);
1182
1183 static void zcrypt_status_mask(char status[], size_t max_adapters)
1184 {
1185 struct zcrypt_card *zc;
1186 struct zcrypt_queue *zq;
1187 int card;
1188
1189 memset(status, 0, max_adapters);
1190 spin_lock(&zcrypt_list_lock);
1191 for_each_zcrypt_card(zc) {
1192 for_each_zcrypt_queue(zq, zc) {
1193 card = AP_QID_CARD(zq->queue->qid);
1194 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1195 || card >= max_adapters)
1196 continue;
1197 status[card] = zc->online ? zc->user_space_type : 0x0d;
1198 }
1199 }
1200 spin_unlock(&zcrypt_list_lock);
1201 }
1202
1203 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1204 {
1205 struct zcrypt_card *zc;
1206 struct zcrypt_queue *zq;
1207 int card;
1208
1209 memset(qdepth, 0, max_adapters);
1210 spin_lock(&zcrypt_list_lock);
1211 local_bh_disable();
1212 for_each_zcrypt_card(zc) {
1213 for_each_zcrypt_queue(zq, zc) {
1214 card = AP_QID_CARD(zq->queue->qid);
1215 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1216 || card >= max_adapters)
1217 continue;
1218 spin_lock(&zq->queue->lock);
1219 qdepth[card] =
1220 zq->queue->pendingq_count +
1221 zq->queue->requestq_count;
1222 spin_unlock(&zq->queue->lock);
1223 }
1224 }
1225 local_bh_enable();
1226 spin_unlock(&zcrypt_list_lock);
1227 }
1228
1229 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1230 {
1231 struct zcrypt_card *zc;
1232 struct zcrypt_queue *zq;
1233 int card;
1234 u64 cnt;
1235
1236 memset(reqcnt, 0, sizeof(int) * max_adapters);
1237 spin_lock(&zcrypt_list_lock);
1238 local_bh_disable();
1239 for_each_zcrypt_card(zc) {
1240 for_each_zcrypt_queue(zq, zc) {
1241 card = AP_QID_CARD(zq->queue->qid);
1242 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1243 || card >= max_adapters)
1244 continue;
1245 spin_lock(&zq->queue->lock);
1246 cnt = zq->queue->total_request_count;
1247 spin_unlock(&zq->queue->lock);
1248 reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX;
1249 }
1250 }
1251 local_bh_enable();
1252 spin_unlock(&zcrypt_list_lock);
1253 }
1254
1255 static int zcrypt_pendingq_count(void)
1256 {
1257 struct zcrypt_card *zc;
1258 struct zcrypt_queue *zq;
1259 int pendingq_count;
1260
1261 pendingq_count = 0;
1262 spin_lock(&zcrypt_list_lock);
1263 local_bh_disable();
1264 for_each_zcrypt_card(zc) {
1265 for_each_zcrypt_queue(zq, zc) {
1266 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1267 continue;
1268 spin_lock(&zq->queue->lock);
1269 pendingq_count += zq->queue->pendingq_count;
1270 spin_unlock(&zq->queue->lock);
1271 }
1272 }
1273 local_bh_enable();
1274 spin_unlock(&zcrypt_list_lock);
1275 return pendingq_count;
1276 }
1277
1278 static int zcrypt_requestq_count(void)
1279 {
1280 struct zcrypt_card *zc;
1281 struct zcrypt_queue *zq;
1282 int requestq_count;
1283
1284 requestq_count = 0;
1285 spin_lock(&zcrypt_list_lock);
1286 local_bh_disable();
1287 for_each_zcrypt_card(zc) {
1288 for_each_zcrypt_queue(zq, zc) {
1289 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1290 continue;
1291 spin_lock(&zq->queue->lock);
1292 requestq_count += zq->queue->requestq_count;
1293 spin_unlock(&zq->queue->lock);
1294 }
1295 }
1296 local_bh_enable();
1297 spin_unlock(&zcrypt_list_lock);
1298 return requestq_count;
1299 }
1300
1301 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1302 unsigned long arg)
1303 {
1304 int rc;
1305 struct ap_perms *perms =
1306 (struct ap_perms *) filp->private_data;
1307
1308 rc = zcrypt_check_ioctl(perms, cmd);
1309 if (rc)
1310 return rc;
1311
1312 switch (cmd) {
1313 case ICARSAMODEXPO: {
1314 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1315 struct ica_rsa_modexpo mex;
1316
1317 if (copy_from_user(&mex, umex, sizeof(mex)))
1318 return -EFAULT;
1319 do {
1320 rc = zcrypt_rsa_modexpo(perms, &mex);
1321 } while (rc == -EAGAIN);
1322 /* on failure: retry once again after a requested rescan */
1323 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1324 do {
1325 rc = zcrypt_rsa_modexpo(perms, &mex);
1326 } while (rc == -EAGAIN);
1327 if (rc) {
1328 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1329 return rc;
1330 }
1331 return put_user(mex.outputdatalength, &umex->outputdatalength);
1332 }
1333 case ICARSACRT: {
1334 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1335 struct ica_rsa_modexpo_crt crt;
1336
1337 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1338 return -EFAULT;
1339 do {
1340 rc = zcrypt_rsa_crt(perms, &crt);
1341 } while (rc == -EAGAIN);
1342 /* on failure: retry once again after a requested rescan */
1343 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1344 do {
1345 rc = zcrypt_rsa_crt(perms, &crt);
1346 } while (rc == -EAGAIN);
1347 if (rc) {
1348 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1349 return rc;
1350 }
1351 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1352 }
1353 case ZSECSENDCPRB: {
1354 struct ica_xcRB __user *uxcRB = (void __user *) arg;
1355 struct ica_xcRB xcRB;
1356
1357 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1358 return -EFAULT;
1359 do {
1360 rc = _zcrypt_send_cprb(perms, &xcRB);
1361 } while (rc == -EAGAIN);
1362 /* on failure: retry once again after a requested rescan */
1363 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1364 do {
1365 rc = _zcrypt_send_cprb(perms, &xcRB);
1366 } while (rc == -EAGAIN);
1367 if (rc)
1368 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1369 rc, xcRB.status);
1370 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1371 return -EFAULT;
1372 return rc;
1373 }
1374 case ZSENDEP11CPRB: {
1375 struct ep11_urb __user *uxcrb = (void __user *)arg;
1376 struct ep11_urb xcrb;
1377
1378 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1379 return -EFAULT;
1380 do {
1381 rc = _zcrypt_send_ep11_cprb(perms, &xcrb);
1382 } while (rc == -EAGAIN);
1383 /* on failure: retry once again after a requested rescan */
1384 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1385 do {
1386 rc = _zcrypt_send_ep11_cprb(perms, &xcrb);
1387 } while (rc == -EAGAIN);
1388 if (rc)
1389 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1390 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1391 return -EFAULT;
1392 return rc;
1393 }
1394 case ZCRYPT_DEVICE_STATUS: {
1395 struct zcrypt_device_status_ext *device_status;
1396 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1397 * sizeof(struct zcrypt_device_status_ext);
1398
1399 device_status = kzalloc(total_size, GFP_KERNEL);
1400 if (!device_status)
1401 return -ENOMEM;
1402 zcrypt_device_status_mask_ext(device_status);
1403 if (copy_to_user((char __user *) arg, device_status,
1404 total_size))
1405 rc = -EFAULT;
1406 kfree(device_status);
1407 return rc;
1408 }
1409 case ZCRYPT_STATUS_MASK: {
1410 char status[AP_DEVICES];
1411
1412 zcrypt_status_mask(status, AP_DEVICES);
1413 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1414 return -EFAULT;
1415 return 0;
1416 }
1417 case ZCRYPT_QDEPTH_MASK: {
1418 char qdepth[AP_DEVICES];
1419
1420 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1421 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1422 return -EFAULT;
1423 return 0;
1424 }
1425 case ZCRYPT_PERDEV_REQCNT: {
1426 u32 *reqcnt;
1427
1428 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1429 if (!reqcnt)
1430 return -ENOMEM;
1431 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1432 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1433 rc = -EFAULT;
1434 kfree(reqcnt);
1435 return rc;
1436 }
1437 case Z90STAT_REQUESTQ_COUNT:
1438 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1439 case Z90STAT_PENDINGQ_COUNT:
1440 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1441 case Z90STAT_TOTALOPEN_COUNT:
1442 return put_user(atomic_read(&zcrypt_open_count),
1443 (int __user *) arg);
1444 case Z90STAT_DOMAIN_INDEX:
1445 return put_user(ap_domain_index, (int __user *) arg);
1446 /*
1447 * Deprecated ioctls
1448 */
1449 case ZDEVICESTATUS: {
1450 /* the old ioctl supports only 64 adapters */
1451 struct zcrypt_device_status *device_status;
1452 size_t total_size = MAX_ZDEV_ENTRIES
1453 * sizeof(struct zcrypt_device_status);
1454
1455 device_status = kzalloc(total_size, GFP_KERNEL);
1456 if (!device_status)
1457 return -ENOMEM;
1458 zcrypt_device_status_mask(device_status);
1459 if (copy_to_user((char __user *) arg, device_status,
1460 total_size))
1461 rc = -EFAULT;
1462 kfree(device_status);
1463 return rc;
1464 }
1465 case Z90STAT_STATUS_MASK: {
1466 /* the old ioctl supports only 64 adapters */
1467 char status[MAX_ZDEV_CARDIDS];
1468
1469 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1470 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1471 return -EFAULT;
1472 return 0;
1473 }
1474 case Z90STAT_QDEPTH_MASK: {
1475 /* the old ioctl supports only 64 adapters */
1476 char qdepth[MAX_ZDEV_CARDIDS];
1477
1478 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1479 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1480 return -EFAULT;
1481 return 0;
1482 }
1483 case Z90STAT_PERDEV_REQCNT: {
1484 /* the old ioctl supports only 64 adapters */
1485 u32 reqcnt[MAX_ZDEV_CARDIDS];
1486
1487 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1488 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1489 return -EFAULT;
1490 return 0;
1491 }
1492 /* unknown ioctl number */
1493 default:
1494 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1495 return -ENOIOCTLCMD;
1496 }
1497 }
1498
1499 #ifdef CONFIG_COMPAT
1500 /*
1501 * ioctl32 conversion routines
1502 */
1503 struct compat_ica_rsa_modexpo {
1504 compat_uptr_t inputdata;
1505 unsigned int inputdatalength;
1506 compat_uptr_t outputdata;
1507 unsigned int outputdatalength;
1508 compat_uptr_t b_key;
1509 compat_uptr_t n_modulus;
1510 };
1511
1512 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1513 unsigned int cmd, unsigned long arg)
1514 {
1515 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1516 struct compat_ica_rsa_modexpo mex32;
1517 struct ica_rsa_modexpo mex64;
1518 long rc;
1519
1520 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1521 return -EFAULT;
1522 mex64.inputdata = compat_ptr(mex32.inputdata);
1523 mex64.inputdatalength = mex32.inputdatalength;
1524 mex64.outputdata = compat_ptr(mex32.outputdata);
1525 mex64.outputdatalength = mex32.outputdatalength;
1526 mex64.b_key = compat_ptr(mex32.b_key);
1527 mex64.n_modulus = compat_ptr(mex32.n_modulus);
1528 do {
1529 rc = zcrypt_rsa_modexpo(perms, &mex64);
1530 } while (rc == -EAGAIN);
1531 /* on failure: retry once again after a requested rescan */
1532 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1533 do {
1534 rc = zcrypt_rsa_modexpo(perms, &mex64);
1535 } while (rc == -EAGAIN);
1536 if (rc)
1537 return rc;
1538 return put_user(mex64.outputdatalength,
1539 &umex32->outputdatalength);
1540 }
1541
1542 struct compat_ica_rsa_modexpo_crt {
1543 compat_uptr_t inputdata;
1544 unsigned int inputdatalength;
1545 compat_uptr_t outputdata;
1546 unsigned int outputdatalength;
1547 compat_uptr_t bp_key;
1548 compat_uptr_t bq_key;
1549 compat_uptr_t np_prime;
1550 compat_uptr_t nq_prime;
1551 compat_uptr_t u_mult_inv;
1552 };
1553
1554 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1555 unsigned int cmd, unsigned long arg)
1556 {
1557 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1558 struct compat_ica_rsa_modexpo_crt crt32;
1559 struct ica_rsa_modexpo_crt crt64;
1560 long rc;
1561
1562 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1563 return -EFAULT;
1564 crt64.inputdata = compat_ptr(crt32.inputdata);
1565 crt64.inputdatalength = crt32.inputdatalength;
1566 crt64.outputdata = compat_ptr(crt32.outputdata);
1567 crt64.outputdatalength = crt32.outputdatalength;
1568 crt64.bp_key = compat_ptr(crt32.bp_key);
1569 crt64.bq_key = compat_ptr(crt32.bq_key);
1570 crt64.np_prime = compat_ptr(crt32.np_prime);
1571 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1572 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1573 do {
1574 rc = zcrypt_rsa_crt(perms, &crt64);
1575 } while (rc == -EAGAIN);
1576 /* on failure: retry once again after a requested rescan */
1577 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1578 do {
1579 rc = zcrypt_rsa_crt(perms, &crt64);
1580 } while (rc == -EAGAIN);
1581 if (rc)
1582 return rc;
1583 return put_user(crt64.outputdatalength,
1584 &ucrt32->outputdatalength);
1585 }
1586
1587 struct compat_ica_xcRB {
1588 unsigned short agent_ID;
1589 unsigned int user_defined;
1590 unsigned short request_ID;
1591 unsigned int request_control_blk_length;
1592 unsigned char padding1[16 - sizeof(compat_uptr_t)];
1593 compat_uptr_t request_control_blk_addr;
1594 unsigned int request_data_length;
1595 char padding2[16 - sizeof(compat_uptr_t)];
1596 compat_uptr_t request_data_address;
1597 unsigned int reply_control_blk_length;
1598 char padding3[16 - sizeof(compat_uptr_t)];
1599 compat_uptr_t reply_control_blk_addr;
1600 unsigned int reply_data_length;
1601 char padding4[16 - sizeof(compat_uptr_t)];
1602 compat_uptr_t reply_data_addr;
1603 unsigned short priority_window;
1604 unsigned int status;
1605 } __packed;
1606
1607 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1608 unsigned int cmd, unsigned long arg)
1609 {
1610 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1611 struct compat_ica_xcRB xcRB32;
1612 struct ica_xcRB xcRB64;
1613 long rc;
1614
1615 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1616 return -EFAULT;
1617 xcRB64.agent_ID = xcRB32.agent_ID;
1618 xcRB64.user_defined = xcRB32.user_defined;
1619 xcRB64.request_ID = xcRB32.request_ID;
1620 xcRB64.request_control_blk_length =
1621 xcRB32.request_control_blk_length;
1622 xcRB64.request_control_blk_addr =
1623 compat_ptr(xcRB32.request_control_blk_addr);
1624 xcRB64.request_data_length =
1625 xcRB32.request_data_length;
1626 xcRB64.request_data_address =
1627 compat_ptr(xcRB32.request_data_address);
1628 xcRB64.reply_control_blk_length =
1629 xcRB32.reply_control_blk_length;
1630 xcRB64.reply_control_blk_addr =
1631 compat_ptr(xcRB32.reply_control_blk_addr);
1632 xcRB64.reply_data_length = xcRB32.reply_data_length;
1633 xcRB64.reply_data_addr =
1634 compat_ptr(xcRB32.reply_data_addr);
1635 xcRB64.priority_window = xcRB32.priority_window;
1636 xcRB64.status = xcRB32.status;
1637 do {
1638 rc = _zcrypt_send_cprb(perms, &xcRB64);
1639 } while (rc == -EAGAIN);
1640 /* on failure: retry once again after a requested rescan */
1641 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1642 do {
1643 rc = _zcrypt_send_cprb(perms, &xcRB64);
1644 } while (rc == -EAGAIN);
1645 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1646 xcRB32.reply_data_length = xcRB64.reply_data_length;
1647 xcRB32.status = xcRB64.status;
1648 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1649 return -EFAULT;
1650 return rc;
1651 }
1652
1653 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1654 unsigned long arg)
1655 {
1656 int rc;
1657 struct ap_perms *perms =
1658 (struct ap_perms *) filp->private_data;
1659
1660 rc = zcrypt_check_ioctl(perms, cmd);
1661 if (rc)
1662 return rc;
1663
1664 if (cmd == ICARSAMODEXPO)
1665 return trans_modexpo32(perms, filp, cmd, arg);
1666 if (cmd == ICARSACRT)
1667 return trans_modexpo_crt32(perms, filp, cmd, arg);
1668 if (cmd == ZSECSENDCPRB)
1669 return trans_xcRB32(perms, filp, cmd, arg);
1670 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1671 }
1672 #endif
1673
1674 /*
1675 * Misc device file operations.
1676 */
1677 static const struct file_operations zcrypt_fops = {
1678 .owner = THIS_MODULE,
1679 .read = zcrypt_read,
1680 .write = zcrypt_write,
1681 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1682 #ifdef CONFIG_COMPAT
1683 .compat_ioctl = zcrypt_compat_ioctl,
1684 #endif
1685 .open = zcrypt_open,
1686 .release = zcrypt_release,
1687 .llseek = no_llseek,
1688 };
1689
1690 /*
1691 * Misc device.
1692 */
1693 static struct miscdevice zcrypt_misc_device = {
1694 .minor = MISC_DYNAMIC_MINOR,
1695 .name = "z90crypt",
1696 .fops = &zcrypt_fops,
1697 };
1698
1699 static int zcrypt_rng_device_count;
1700 static u32 *zcrypt_rng_buffer;
1701 static int zcrypt_rng_buffer_index;
1702 static DEFINE_MUTEX(zcrypt_rng_mutex);
1703
1704 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1705 {
1706 int rc;
1707
1708 /*
1709 * We don't need locking here because the RNG API guarantees serialized
1710 * read method calls.
1711 */
1712 if (zcrypt_rng_buffer_index == 0) {
1713 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1714 /* on failure: retry once again after a requested rescan */
1715 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1716 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1717 if (rc < 0)
1718 return -EIO;
1719 zcrypt_rng_buffer_index = rc / sizeof(*data);
1720 }
1721 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1722 return sizeof(*data);
1723 }
1724
1725 static struct hwrng zcrypt_rng_dev = {
1726 .name = "zcrypt",
1727 .data_read = zcrypt_rng_data_read,
1728 .quality = 990,
1729 };
1730
1731 int zcrypt_rng_device_add(void)
1732 {
1733 int rc = 0;
1734
1735 mutex_lock(&zcrypt_rng_mutex);
1736 if (zcrypt_rng_device_count == 0) {
1737 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1738 if (!zcrypt_rng_buffer) {
1739 rc = -ENOMEM;
1740 goto out;
1741 }
1742 zcrypt_rng_buffer_index = 0;
1743 if (!zcrypt_hwrng_seed)
1744 zcrypt_rng_dev.quality = 0;
1745 rc = hwrng_register(&zcrypt_rng_dev);
1746 if (rc)
1747 goto out_free;
1748 zcrypt_rng_device_count = 1;
1749 } else
1750 zcrypt_rng_device_count++;
1751 mutex_unlock(&zcrypt_rng_mutex);
1752 return 0;
1753
1754 out_free:
1755 free_page((unsigned long) zcrypt_rng_buffer);
1756 out:
1757 mutex_unlock(&zcrypt_rng_mutex);
1758 return rc;
1759 }
1760
1761 void zcrypt_rng_device_remove(void)
1762 {
1763 mutex_lock(&zcrypt_rng_mutex);
1764 zcrypt_rng_device_count--;
1765 if (zcrypt_rng_device_count == 0) {
1766 hwrng_unregister(&zcrypt_rng_dev);
1767 free_page((unsigned long) zcrypt_rng_buffer);
1768 }
1769 mutex_unlock(&zcrypt_rng_mutex);
1770 }
1771
1772 int __init zcrypt_debug_init(void)
1773 {
1774 zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1775 DBF_MAX_SPRINTF_ARGS * sizeof(long));
1776 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1777 debug_set_level(zcrypt_dbf_info, DBF_ERR);
1778
1779 return 0;
1780 }
1781
1782 void zcrypt_debug_exit(void)
1783 {
1784 debug_unregister(zcrypt_dbf_info);
1785 }
1786
1787 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1788
1789 static int __init zcdn_init(void)
1790 {
1791 int rc;
1792
1793 /* create a new class 'zcrypt' */
1794 zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
1795 if (IS_ERR(zcrypt_class)) {
1796 rc = PTR_ERR(zcrypt_class);
1797 goto out_class_create_failed;
1798 }
1799 zcrypt_class->dev_release = zcdn_device_release;
1800
1801 /* alloc device minor range */
1802 rc = alloc_chrdev_region(&zcrypt_devt,
1803 0, ZCRYPT_MAX_MINOR_NODES,
1804 ZCRYPT_NAME);
1805 if (rc)
1806 goto out_alloc_chrdev_failed;
1807
1808 cdev_init(&zcrypt_cdev, &zcrypt_fops);
1809 zcrypt_cdev.owner = THIS_MODULE;
1810 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1811 if (rc)
1812 goto out_cdev_add_failed;
1813
1814 /* need some class specific sysfs attributes */
1815 rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
1816 if (rc)
1817 goto out_class_create_file_1_failed;
1818 rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
1819 if (rc)
1820 goto out_class_create_file_2_failed;
1821
1822 return 0;
1823
1824 out_class_create_file_2_failed:
1825 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1826 out_class_create_file_1_failed:
1827 cdev_del(&zcrypt_cdev);
1828 out_cdev_add_failed:
1829 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1830 out_alloc_chrdev_failed:
1831 class_destroy(zcrypt_class);
1832 out_class_create_failed:
1833 return rc;
1834 }
1835
1836 static void zcdn_exit(void)
1837 {
1838 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1839 class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
1840 zcdn_destroy_all();
1841 cdev_del(&zcrypt_cdev);
1842 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1843 class_destroy(zcrypt_class);
1844 }
1845
1846 #endif
1847
1848 /**
1849 * zcrypt_api_init(): Module initialization.
1850 *
1851 * The module initialization code.
1852 */
1853 int __init zcrypt_api_init(void)
1854 {
1855 int rc;
1856
1857 rc = zcrypt_debug_init();
1858 if (rc)
1859 goto out;
1860
1861 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1862 rc = zcdn_init();
1863 if (rc)
1864 goto out;
1865 #endif
1866
1867 /* Register the request sprayer. */
1868 rc = misc_register(&zcrypt_misc_device);
1869 if (rc < 0)
1870 goto out_misc_register_failed;
1871
1872 zcrypt_msgtype6_init();
1873 zcrypt_msgtype50_init();
1874
1875 return 0;
1876
1877 out_misc_register_failed:
1878 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1879 zcdn_exit();
1880 #endif
1881 zcrypt_debug_exit();
1882 out:
1883 return rc;
1884 }
1885
1886 /**
1887 * zcrypt_api_exit(): Module termination.
1888 *
1889 * The module termination code.
1890 */
1891 void __exit zcrypt_api_exit(void)
1892 {
1893 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1894 zcdn_exit();
1895 #endif
1896 misc_deregister(&zcrypt_misc_device);
1897 zcrypt_msgtype6_exit();
1898 zcrypt_msgtype50_exit();
1899 zcrypt_ccamisc_exit();
1900 zcrypt_ep11misc_exit();
1901 zcrypt_debug_exit();
1902 }
1903
1904 module_init(zcrypt_api_init);
1905 module_exit(zcrypt_api_exit);
Linux with added FPC-III support