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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / s390 / crypto / zcrypt_api.c
blob10206e4498d07e686fdaa88603a897322c7feb33
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 */
45 MODULE_AUTHOR("IBM Corporation");
46 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
47 "Copyright IBM Corp. 2001, 2012");
48 MODULE_LICENSE("GPL");
49
50 /*
51 * zcrypt tracepoint functions
52 */
53 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
54 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
55
56 static int zcrypt_hwrng_seed = 1;
57 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
58 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
59
60 DEFINE_SPINLOCK(zcrypt_list_lock);
61 LIST_HEAD(zcrypt_card_list);
62 int zcrypt_device_count;
63
64 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
65 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
66
67 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
68 EXPORT_SYMBOL(zcrypt_rescan_req);
69
70 static LIST_HEAD(zcrypt_ops_list);
71
72 /* Zcrypt related debug feature stuff. */
73 debug_info_t *zcrypt_dbf_info;
74
75 /**
76 * Process a rescan of the transport layer.
77 *
78 * Returns 1, if the rescan has been processed, otherwise 0.
79 */
80 static inline int zcrypt_process_rescan(void)
81 {
82 if (atomic_read(&zcrypt_rescan_req)) {
83 atomic_set(&zcrypt_rescan_req, 0);
84 atomic_inc(&zcrypt_rescan_count);
85 ap_bus_force_rescan();
86 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
87 atomic_inc_return(&zcrypt_rescan_count));
88 return 1;
89 }
90 return 0;
91 }
92
93 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
94 {
95 list_add_tail(&zops->list, &zcrypt_ops_list);
96 }
97
98 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
99 {
100 list_del_init(&zops->list);
101 }
102
103 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
104 {
105 struct zcrypt_ops *zops;
106
107 list_for_each_entry(zops, &zcrypt_ops_list, list)
108 if ((zops->variant == variant) &&
109 (!strncmp(zops->name, name, sizeof(zops->name))))
110 return zops;
111 return NULL;
112 }
113 EXPORT_SYMBOL(zcrypt_msgtype);
114
115 /*
116 * Multi device nodes extension functions.
117 */
118
119 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
120
121 struct zcdn_device;
122
123 static struct class *zcrypt_class;
124 static dev_t zcrypt_devt;
125 static struct cdev zcrypt_cdev;
126
127 struct zcdn_device {
128 struct device device;
129 struct ap_perms perms;
130 };
131
132 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
133
134 #define ZCDN_MAX_NAME 32
135
136 static int zcdn_create(const char *name);
137 static int zcdn_destroy(const char *name);
138
139 /*
140 * Find zcdn device by name.
141 * Returns reference to the zcdn device which needs to be released
142 * with put_device() after use.
143 */
144 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
145 {
146 struct device *dev = class_find_device_by_name(zcrypt_class, name);
147
148 return dev ? to_zcdn_dev(dev) : NULL;
149 }
150
151 /*
152 * Find zcdn device by devt value.
153 * Returns reference to the zcdn device which needs to be released
154 * with put_device() after use.
155 */
156 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
157 {
158 struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
159
160 return dev ? to_zcdn_dev(dev) : NULL;
161 }
162
163 static ssize_t ioctlmask_show(struct device *dev,
164 struct device_attribute *attr,
165 char *buf)
166 {
167 int i, rc;
168 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
169
170 if (mutex_lock_interruptible(&ap_perms_mutex))
171 return -ERESTARTSYS;
172
173 buf[0] = '0';
174 buf[1] = 'x';
175 for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
176 snprintf(buf + 2 + 2 * i * sizeof(long),
177 PAGE_SIZE - 2 - 2 * i * sizeof(long),
178 "%016lx", zcdndev->perms.ioctlm[i]);
179 buf[2 + 2 * i * sizeof(long)] = '\n';
180 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
181 rc = 2 + 2 * i * sizeof(long) + 1;
182
183 mutex_unlock(&ap_perms_mutex);
184
185 return rc;
186 }
187
188 static ssize_t ioctlmask_store(struct device *dev,
189 struct device_attribute *attr,
190 const char *buf, size_t count)
191 {
192 int rc;
193 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
194
195 rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
196 AP_IOCTLS, &ap_perms_mutex);
197 if (rc)
198 return rc;
199
200 return count;
201 }
202
203 static DEVICE_ATTR_RW(ioctlmask);
204
205 static ssize_t apmask_show(struct device *dev,
206 struct device_attribute *attr,
207 char *buf)
208 {
209 int i, rc;
210 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
211
212 if (mutex_lock_interruptible(&ap_perms_mutex))
213 return -ERESTARTSYS;
214
215 buf[0] = '0';
216 buf[1] = 'x';
217 for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
218 snprintf(buf + 2 + 2 * i * sizeof(long),
219 PAGE_SIZE - 2 - 2 * i * sizeof(long),
220 "%016lx", zcdndev->perms.apm[i]);
221 buf[2 + 2 * i * sizeof(long)] = '\n';
222 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
223 rc = 2 + 2 * i * sizeof(long) + 1;
224
225 mutex_unlock(&ap_perms_mutex);
226
227 return rc;
228 }
229
230 static ssize_t apmask_store(struct device *dev,
231 struct device_attribute *attr,
232 const char *buf, size_t count)
233 {
234 int rc;
235 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
236
237 rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
238 AP_DEVICES, &ap_perms_mutex);
239 if (rc)
240 return rc;
241
242 return count;
243 }
244
245 static DEVICE_ATTR_RW(apmask);
246
247 static ssize_t aqmask_show(struct device *dev,
248 struct device_attribute *attr,
249 char *buf)
250 {
251 int i, rc;
252 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
253
254 if (mutex_lock_interruptible(&ap_perms_mutex))
255 return -ERESTARTSYS;
256
257 buf[0] = '0';
258 buf[1] = 'x';
259 for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
260 snprintf(buf + 2 + 2 * i * sizeof(long),
261 PAGE_SIZE - 2 - 2 * i * sizeof(long),
262 "%016lx", zcdndev->perms.aqm[i]);
263 buf[2 + 2 * i * sizeof(long)] = '\n';
264 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
265 rc = 2 + 2 * i * sizeof(long) + 1;
266
267 mutex_unlock(&ap_perms_mutex);
268
269 return rc;
270 }
271
272 static ssize_t aqmask_store(struct device *dev,
273 struct device_attribute *attr,
274 const char *buf, size_t count)
275 {
276 int rc;
277 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
278
279 rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
280 AP_DOMAINS, &ap_perms_mutex);
281 if (rc)
282 return rc;
283
284 return count;
285 }
286
287 static DEVICE_ATTR_RW(aqmask);
288
289 static struct attribute *zcdn_dev_attrs[] = {
290 &dev_attr_ioctlmask.attr,
291 &dev_attr_apmask.attr,
292 &dev_attr_aqmask.attr,
293 NULL
294 };
295
296 static struct attribute_group zcdn_dev_attr_group = {
297 .attrs = zcdn_dev_attrs
298 };
299
300 static const struct attribute_group *zcdn_dev_attr_groups[] = {
301 &zcdn_dev_attr_group,
302 NULL
303 };
304
305 static ssize_t zcdn_create_store(struct class *class,
306 struct class_attribute *attr,
307 const char *buf, size_t count)
308 {
309 int rc;
310 char name[ZCDN_MAX_NAME];
311
312 strncpy(name, skip_spaces(buf), sizeof(name));
313 name[sizeof(name) - 1] = '\0';
314
315 rc = zcdn_create(strim(name));
316
317 return rc ? rc : count;
318 }
319
320 static const struct class_attribute class_attr_zcdn_create =
321 __ATTR(create, 0600, NULL, zcdn_create_store);
322
323 static ssize_t zcdn_destroy_store(struct class *class,
324 struct class_attribute *attr,
325 const char *buf, size_t count)
326 {
327 int rc;
328 char name[ZCDN_MAX_NAME];
329
330 strncpy(name, skip_spaces(buf), sizeof(name));
331 name[sizeof(name) - 1] = '\0';
332
333 rc = zcdn_destroy(strim(name));
334
335 return rc ? rc : count;
336 }
337
338 static const struct class_attribute class_attr_zcdn_destroy =
339 __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
340
341 static void zcdn_device_release(struct device *dev)
342 {
343 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
344
345 ZCRYPT_DBF(DBF_INFO, "releasing zcdn device %d:%d\n",
346 MAJOR(dev->devt), MINOR(dev->devt));
347
348 kfree(zcdndev);
349 }
350
351 static int zcdn_create(const char *name)
352 {
353 dev_t devt;
354 int i, rc = 0;
355 char nodename[ZCDN_MAX_NAME];
356 struct zcdn_device *zcdndev;
357
358 if (mutex_lock_interruptible(&ap_perms_mutex))
359 return -ERESTARTSYS;
360
361 /* check if device node with this name already exists */
362 if (name[0]) {
363 zcdndev = find_zcdndev_by_name(name);
364 if (zcdndev) {
365 put_device(&zcdndev->device);
366 rc = -EEXIST;
367 goto unlockout;
368 }
369 }
370
371 /* find an unused minor number */
372 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
373 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
374 zcdndev = find_zcdndev_by_devt(devt);
375 if (zcdndev)
376 put_device(&zcdndev->device);
377 else
378 break;
379 }
380 if (i == ZCRYPT_MAX_MINOR_NODES) {
381 rc = -ENOSPC;
382 goto unlockout;
383 }
384
385 /* alloc and prepare a new zcdn device */
386 zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
387 if (!zcdndev) {
388 rc = -ENOMEM;
389 goto unlockout;
390 }
391 zcdndev->device.release = zcdn_device_release;
392 zcdndev->device.class = zcrypt_class;
393 zcdndev->device.devt = devt;
394 zcdndev->device.groups = zcdn_dev_attr_groups;
395 if (name[0])
396 strncpy(nodename, name, sizeof(nodename));
397 else
398 snprintf(nodename, sizeof(nodename),
399 ZCRYPT_NAME "_%d", (int) MINOR(devt));
400 nodename[sizeof(nodename)-1] = '\0';
401 if (dev_set_name(&zcdndev->device, nodename)) {
402 rc = -EINVAL;
403 goto unlockout;
404 }
405 rc = device_register(&zcdndev->device);
406 if (rc) {
407 put_device(&zcdndev->device);
408 goto unlockout;
409 }
410
411 ZCRYPT_DBF(DBF_INFO, "created zcdn device %d:%d\n",
412 MAJOR(devt), MINOR(devt));
413
414 unlockout:
415 mutex_unlock(&ap_perms_mutex);
416 return rc;
417 }
418
419 static int zcdn_destroy(const char *name)
420 {
421 int rc = 0;
422 struct zcdn_device *zcdndev;
423
424 if (mutex_lock_interruptible(&ap_perms_mutex))
425 return -ERESTARTSYS;
426
427 /* try to find this zcdn device */
428 zcdndev = find_zcdndev_by_name(name);
429 if (!zcdndev) {
430 rc = -ENOENT;
431 goto unlockout;
432 }
433
434 /*
435 * The zcdn device is not hard destroyed. It is subject to
436 * reference counting and thus just needs to be unregistered.
437 */
438 put_device(&zcdndev->device);
439 device_unregister(&zcdndev->device);
440
441 unlockout:
442 mutex_unlock(&ap_perms_mutex);
443 return rc;
444 }
445
446 static void zcdn_destroy_all(void)
447 {
448 int i;
449 dev_t devt;
450 struct zcdn_device *zcdndev;
451
452 mutex_lock(&ap_perms_mutex);
453 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
454 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
455 zcdndev = find_zcdndev_by_devt(devt);
456 if (zcdndev) {
457 put_device(&zcdndev->device);
458 device_unregister(&zcdndev->device);
459 }
460 }
461 mutex_unlock(&ap_perms_mutex);
462 }
463
464 #endif
465
466 /**
467 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
468 *
469 * This function is not supported beyond zcrypt 1.3.1.
470 */
471 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
472 size_t count, loff_t *f_pos)
473 {
474 return -EPERM;
475 }
476
477 /**
478 * zcrypt_write(): Not allowed.
479 *
480 * Write is is not allowed
481 */
482 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
483 size_t count, loff_t *f_pos)
484 {
485 return -EPERM;
486 }
487
488 /**
489 * zcrypt_open(): Count number of users.
490 *
491 * Device open function to count number of users.
492 */
493 static int zcrypt_open(struct inode *inode, struct file *filp)
494 {
495 struct ap_perms *perms = &ap_perms;
496
497 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
498 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
499 struct zcdn_device *zcdndev;
500
501 if (mutex_lock_interruptible(&ap_perms_mutex))
502 return -ERESTARTSYS;
503 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
504 /* find returns a reference, no get_device() needed */
505 mutex_unlock(&ap_perms_mutex);
506 if (zcdndev)
507 perms = &zcdndev->perms;
508 }
509 #endif
510 filp->private_data = (void *) perms;
511
512 atomic_inc(&zcrypt_open_count);
513 return stream_open(inode, filp);
514 }
515
516 /**
517 * zcrypt_release(): Count number of users.
518 *
519 * Device close function to count number of users.
520 */
521 static int zcrypt_release(struct inode *inode, struct file *filp)
522 {
523 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
524 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
525 struct zcdn_device *zcdndev;
526
527 mutex_lock(&ap_perms_mutex);
528 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
529 mutex_unlock(&ap_perms_mutex);
530 if (zcdndev) {
531 /* 2 puts here: one for find, one for open */
532 put_device(&zcdndev->device);
533 put_device(&zcdndev->device);
534 }
535 }
536 #endif
537
538 atomic_dec(&zcrypt_open_count);
539 return 0;
540 }
541
542 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
543 unsigned int cmd)
544 {
545 int rc = -EPERM;
546 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
547
548 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
549 if (test_bit_inv(ioctlnr, perms->ioctlm))
550 rc = 0;
551 }
552
553 if (rc)
554 ZCRYPT_DBF(DBF_WARN,
555 "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
556 ioctlnr, rc);
557
558 return rc;
559 }
560
561 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
562 {
563 return test_bit_inv(card, perms->apm) ? true : false;
564 }
565
566 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
567 {
568 return test_bit_inv(queue, perms->aqm) ? true : false;
569 }
570
571 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
572 struct zcrypt_queue *zq,
573 struct module **pmod,
574 unsigned int weight)
575 {
576 if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
577 return NULL;
578 zcrypt_queue_get(zq);
579 get_device(&zq->queue->ap_dev.device);
580 atomic_add(weight, &zc->load);
581 atomic_add(weight, &zq->load);
582 zq->request_count++;
583 *pmod = zq->queue->ap_dev.drv->driver.owner;
584 return zq;
585 }
586
587 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
588 struct zcrypt_queue *zq,
589 struct module *mod,
590 unsigned int weight)
591 {
592 zq->request_count--;
593 atomic_sub(weight, &zc->load);
594 atomic_sub(weight, &zq->load);
595 put_device(&zq->queue->ap_dev.device);
596 zcrypt_queue_put(zq);
597 module_put(mod);
598 }
599
600 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
601 struct zcrypt_card *pref_zc,
602 unsigned int weight,
603 unsigned int pref_weight)
604 {
605 if (!pref_zc)
606 return true;
607 weight += atomic_read(&zc->load);
608 pref_weight += atomic_read(&pref_zc->load);
609 if (weight == pref_weight)
610 return atomic64_read(&zc->card->total_request_count) <
611 atomic64_read(&pref_zc->card->total_request_count);
612 return weight < pref_weight;
613 }
614
615 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
616 struct zcrypt_queue *pref_zq,
617 unsigned int weight,
618 unsigned int pref_weight)
619 {
620 if (!pref_zq)
621 return true;
622 weight += atomic_read(&zq->load);
623 pref_weight += atomic_read(&pref_zq->load);
624 if (weight == pref_weight)
625 return zq->queue->total_request_count <
626 pref_zq->queue->total_request_count;
627 return weight < pref_weight;
628 }
629
630 /*
631 * zcrypt ioctls.
632 */
633 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
634 struct zcrypt_track *tr,
635 struct ica_rsa_modexpo *mex)
636 {
637 struct zcrypt_card *zc, *pref_zc;
638 struct zcrypt_queue *zq, *pref_zq;
639 struct ap_message ap_msg;
640 unsigned int wgt = 0, pref_wgt = 0;
641 unsigned int func_code;
642 int cpen, qpen, qid = 0, rc = -ENODEV;
643 struct module *mod;
644
645 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
646
647 ap_init_message(&ap_msg);
648
649 #ifdef CONFIG_ZCRYPT_DEBUG
650 if (tr && tr->fi.cmd)
651 ap_msg.fi.cmd = tr->fi.cmd;
652 #endif
653
654 if (mex->outputdatalength < mex->inputdatalength) {
655 func_code = 0;
656 rc = -EINVAL;
657 goto out;
658 }
659
660 /*
661 * As long as outputdatalength is big enough, we can set the
662 * outputdatalength equal to the inputdatalength, since that is the
663 * number of bytes we will copy in any case
664 */
665 mex->outputdatalength = mex->inputdatalength;
666
667 rc = get_rsa_modex_fc(mex, &func_code);
668 if (rc)
669 goto out;
670
671 pref_zc = NULL;
672 pref_zq = NULL;
673 spin_lock(&zcrypt_list_lock);
674 for_each_zcrypt_card(zc) {
675 /* Check for useable accelarator or CCA card */
676 if (!zc->online || !zc->card->config ||
677 !(zc->card->functions & 0x18000000))
678 continue;
679 /* Check for size limits */
680 if (zc->min_mod_size > mex->inputdatalength ||
681 zc->max_mod_size < mex->inputdatalength)
682 continue;
683 /* check if device node has admission for this card */
684 if (!zcrypt_check_card(perms, zc->card->id))
685 continue;
686 /* get weight index of the card device */
687 wgt = zc->speed_rating[func_code];
688 /* penalty if this msg was previously sent via this card */
689 cpen = (tr && tr->again_counter && tr->last_qid &&
690 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
691 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
692 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
693 continue;
694 for_each_zcrypt_queue(zq, zc) {
695 /* check if device is useable and eligible */
696 if (!zq->online || !zq->ops->rsa_modexpo ||
697 !zq->queue->config)
698 continue;
699 /* check if device node has admission for this queue */
700 if (!zcrypt_check_queue(perms,
701 AP_QID_QUEUE(zq->queue->qid)))
702 continue;
703 /* penalty if the msg was previously sent at this qid */
704 qpen = (tr && tr->again_counter && tr->last_qid &&
705 tr->last_qid == zq->queue->qid) ?
706 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
707 if (!zcrypt_queue_compare(zq, pref_zq,
708 wgt + cpen + qpen, pref_wgt))
709 continue;
710 pref_zc = zc;
711 pref_zq = zq;
712 pref_wgt = wgt + cpen + qpen;
713 }
714 }
715 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
716 spin_unlock(&zcrypt_list_lock);
717
718 if (!pref_zq) {
719 rc = -ENODEV;
720 goto out;
721 }
722
723 qid = pref_zq->queue->qid;
724 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
725
726 spin_lock(&zcrypt_list_lock);
727 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
728 spin_unlock(&zcrypt_list_lock);
729
730 out:
731 ap_release_message(&ap_msg);
732 if (tr) {
733 tr->last_rc = rc;
734 tr->last_qid = qid;
735 }
736 trace_s390_zcrypt_rep(mex, func_code, rc,
737 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
738 return rc;
739 }
740
741 static long zcrypt_rsa_crt(struct ap_perms *perms,
742 struct zcrypt_track *tr,
743 struct ica_rsa_modexpo_crt *crt)
744 {
745 struct zcrypt_card *zc, *pref_zc;
746 struct zcrypt_queue *zq, *pref_zq;
747 struct ap_message ap_msg;
748 unsigned int wgt = 0, pref_wgt = 0;
749 unsigned int func_code;
750 int cpen, qpen, qid = 0, rc = -ENODEV;
751 struct module *mod;
752
753 trace_s390_zcrypt_req(crt, TP_ICARSACRT);
754
755 ap_init_message(&ap_msg);
756
757 #ifdef CONFIG_ZCRYPT_DEBUG
758 if (tr && tr->fi.cmd)
759 ap_msg.fi.cmd = tr->fi.cmd;
760 #endif
761
762 if (crt->outputdatalength < crt->inputdatalength) {
763 func_code = 0;
764 rc = -EINVAL;
765 goto out;
766 }
767
768 /*
769 * As long as outputdatalength is big enough, we can set the
770 * outputdatalength equal to the inputdatalength, since that is the
771 * number of bytes we will copy in any case
772 */
773 crt->outputdatalength = crt->inputdatalength;
774
775 rc = get_rsa_crt_fc(crt, &func_code);
776 if (rc)
777 goto out;
778
779 pref_zc = NULL;
780 pref_zq = NULL;
781 spin_lock(&zcrypt_list_lock);
782 for_each_zcrypt_card(zc) {
783 /* Check for useable accelarator or CCA card */
784 if (!zc->online || !zc->card->config ||
785 !(zc->card->functions & 0x18000000))
786 continue;
787 /* Check for size limits */
788 if (zc->min_mod_size > crt->inputdatalength ||
789 zc->max_mod_size < crt->inputdatalength)
790 continue;
791 /* check if device node has admission for this card */
792 if (!zcrypt_check_card(perms, zc->card->id))
793 continue;
794 /* get weight index of the card device */
795 wgt = zc->speed_rating[func_code];
796 /* penalty if this msg was previously sent via this card */
797 cpen = (tr && tr->again_counter && tr->last_qid &&
798 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
799 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
800 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
801 continue;
802 for_each_zcrypt_queue(zq, zc) {
803 /* check if device is useable and eligible */
804 if (!zq->online || !zq->ops->rsa_modexpo_crt ||
805 !zq->queue->config)
806 continue;
807 /* check if device node has admission for this queue */
808 if (!zcrypt_check_queue(perms,
809 AP_QID_QUEUE(zq->queue->qid)))
810 continue;
811 /* penalty if the msg was previously sent at this qid */
812 qpen = (tr && tr->again_counter && tr->last_qid &&
813 tr->last_qid == zq->queue->qid) ?
814 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
815 if (!zcrypt_queue_compare(zq, pref_zq,
816 wgt + cpen + qpen, pref_wgt))
817 continue;
818 pref_zc = zc;
819 pref_zq = zq;
820 pref_wgt = wgt + cpen + qpen;
821 }
822 }
823 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
824 spin_unlock(&zcrypt_list_lock);
825
826 if (!pref_zq) {
827 rc = -ENODEV;
828 goto out;
829 }
830
831 qid = pref_zq->queue->qid;
832 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
833
834 spin_lock(&zcrypt_list_lock);
835 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
836 spin_unlock(&zcrypt_list_lock);
837
838 out:
839 ap_release_message(&ap_msg);
840 if (tr) {
841 tr->last_rc = rc;
842 tr->last_qid = qid;
843 }
844 trace_s390_zcrypt_rep(crt, func_code, rc,
845 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
846 return rc;
847 }
848
849 static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
850 struct zcrypt_track *tr,
851 struct ica_xcRB *xcRB)
852 {
853 struct zcrypt_card *zc, *pref_zc;
854 struct zcrypt_queue *zq, *pref_zq;
855 struct ap_message ap_msg;
856 unsigned int wgt = 0, pref_wgt = 0;
857 unsigned int func_code;
858 unsigned short *domain, tdom;
859 int cpen, qpen, qid = 0, rc = -ENODEV;
860 struct module *mod;
861
862 trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
863
864 xcRB->status = 0;
865 ap_init_message(&ap_msg);
866
867 #ifdef CONFIG_ZCRYPT_DEBUG
868 if (tr && tr->fi.cmd)
869 ap_msg.fi.cmd = tr->fi.cmd;
870 if (tr && tr->fi.action == AP_FI_ACTION_CCA_AGENT_FF) {
871 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid agent_ID 'FF'\n",
872 __func__, tr->fi.cmd);
873 xcRB->agent_ID = 0x4646;
874 }
875 #endif
876
877 rc = get_cprb_fc(userspace, xcRB, &ap_msg, &func_code, &domain);
878 if (rc)
879 goto out;
880
881 /*
882 * If a valid target domain is set and this domain is NOT a usage
883 * domain but a control only domain, use the default domain as target.
884 */
885 tdom = *domain;
886 if (tdom < AP_DOMAINS &&
887 !ap_test_config_usage_domain(tdom) &&
888 ap_test_config_ctrl_domain(tdom) &&
889 ap_domain_index >= 0)
890 tdom = ap_domain_index;
891
892 pref_zc = NULL;
893 pref_zq = NULL;
894 spin_lock(&zcrypt_list_lock);
895 for_each_zcrypt_card(zc) {
896 /* Check for useable CCA card */
897 if (!zc->online || !zc->card->config ||
898 !(zc->card->functions & 0x10000000))
899 continue;
900 /* Check for user selected CCA card */
901 if (xcRB->user_defined != AUTOSELECT &&
902 xcRB->user_defined != zc->card->id)
903 continue;
904 /* check if device node has admission for this card */
905 if (!zcrypt_check_card(perms, zc->card->id))
906 continue;
907 /* get weight index of the card device */
908 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
909 /* penalty if this msg was previously sent via this card */
910 cpen = (tr && tr->again_counter && tr->last_qid &&
911 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
912 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
913 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
914 continue;
915 for_each_zcrypt_queue(zq, zc) {
916 /* check for device useable and eligible */
917 if (!zq->online ||
918 !zq->ops->send_cprb ||
919 !zq->queue->config ||
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 rc = -ENODEV;
944 goto out;
945 }
946
947 /* in case of auto select, provide the correct domain */
948 qid = pref_zq->queue->qid;
949 if (*domain == AUTOSEL_DOM)
950 *domain = AP_QID_QUEUE(qid);
951
952 #ifdef CONFIG_ZCRYPT_DEBUG
953 if (tr && tr->fi.action == AP_FI_ACTION_CCA_DOM_INVAL) {
954 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid domain\n",
955 __func__, tr->fi.cmd);
956 *domain = 99;
957 }
958 #endif
959
960 rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcRB, &ap_msg);
961
962 spin_lock(&zcrypt_list_lock);
963 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
964 spin_unlock(&zcrypt_list_lock);
965
966 out:
967 ap_release_message(&ap_msg);
968 if (tr) {
969 tr->last_rc = rc;
970 tr->last_qid = qid;
971 }
972 trace_s390_zcrypt_rep(xcRB, func_code, rc,
973 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
974 return rc;
975 }
976
977 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
978 {
979 return _zcrypt_send_cprb(false, &ap_perms, NULL, xcRB);
980 }
981 EXPORT_SYMBOL(zcrypt_send_cprb);
982
983 static bool is_desired_ep11_card(unsigned int dev_id,
984 unsigned short target_num,
985 struct ep11_target_dev *targets)
986 {
987 while (target_num-- > 0) {
988 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
989 return true;
990 targets++;
991 }
992 return false;
993 }
994
995 static bool is_desired_ep11_queue(unsigned int dev_qid,
996 unsigned short target_num,
997 struct ep11_target_dev *targets)
998 {
999 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
1000
1001 while (target_num-- > 0) {
1002 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
1003 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
1004 return true;
1005 targets++;
1006 }
1007 return false;
1008 }
1009
1010 static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
1011 struct zcrypt_track *tr,
1012 struct ep11_urb *xcrb)
1013 {
1014 struct zcrypt_card *zc, *pref_zc;
1015 struct zcrypt_queue *zq, *pref_zq;
1016 struct ep11_target_dev *targets;
1017 unsigned short target_num;
1018 unsigned int wgt = 0, pref_wgt = 0;
1019 unsigned int func_code;
1020 struct ap_message ap_msg;
1021 int cpen, qpen, qid = 0, rc = -ENODEV;
1022 struct module *mod;
1023
1024 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
1025
1026 ap_init_message(&ap_msg);
1027
1028 #ifdef CONFIG_ZCRYPT_DEBUG
1029 if (tr && tr->fi.cmd)
1030 ap_msg.fi.cmd = tr->fi.cmd;
1031 #endif
1032
1033 target_num = (unsigned short) xcrb->targets_num;
1034
1035 /* empty list indicates autoselect (all available targets) */
1036 targets = NULL;
1037 if (target_num != 0) {
1038 struct ep11_target_dev __user *uptr;
1039
1040 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
1041 if (!targets) {
1042 func_code = 0;
1043 rc = -ENOMEM;
1044 goto out;
1045 }
1046
1047 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
1048 if (z_copy_from_user(userspace, targets, uptr,
1049 target_num * sizeof(*targets))) {
1050 func_code = 0;
1051 rc = -EFAULT;
1052 goto out_free;
1053 }
1054 }
1055
1056 rc = get_ep11cprb_fc(userspace, xcrb, &ap_msg, &func_code);
1057 if (rc)
1058 goto out_free;
1059
1060 pref_zc = NULL;
1061 pref_zq = NULL;
1062 spin_lock(&zcrypt_list_lock);
1063 for_each_zcrypt_card(zc) {
1064 /* Check for useable EP11 card */
1065 if (!zc->online || !zc->card->config ||
1066 !(zc->card->functions & 0x04000000))
1067 continue;
1068 /* Check for user selected EP11 card */
1069 if (targets &&
1070 !is_desired_ep11_card(zc->card->id, target_num, targets))
1071 continue;
1072 /* check if device node has admission for this card */
1073 if (!zcrypt_check_card(perms, zc->card->id))
1074 continue;
1075 /* get weight index of the card device */
1076 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1077 /* penalty if this msg was previously sent via this card */
1078 cpen = (tr && tr->again_counter && tr->last_qid &&
1079 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
1080 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
1081 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
1082 continue;
1083 for_each_zcrypt_queue(zq, zc) {
1084 /* check if device is useable and eligible */
1085 if (!zq->online ||
1086 !zq->ops->send_ep11_cprb ||
1087 !zq->queue->config ||
1088 (targets &&
1089 !is_desired_ep11_queue(zq->queue->qid,
1090 target_num, targets)))
1091 continue;
1092 /* check if device node has admission for this queue */
1093 if (!zcrypt_check_queue(perms,
1094 AP_QID_QUEUE(zq->queue->qid)))
1095 continue;
1096 /* penalty if the msg was previously sent at this qid */
1097 qpen = (tr && tr->again_counter && tr->last_qid &&
1098 tr->last_qid == zq->queue->qid) ?
1099 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
1100 if (!zcrypt_queue_compare(zq, pref_zq,
1101 wgt + cpen + qpen, pref_wgt))
1102 continue;
1103 pref_zc = zc;
1104 pref_zq = zq;
1105 pref_wgt = wgt + cpen + qpen;
1106 }
1107 }
1108 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1109 spin_unlock(&zcrypt_list_lock);
1110
1111 if (!pref_zq) {
1112 rc = -ENODEV;
1113 goto out_free;
1114 }
1115
1116 qid = pref_zq->queue->qid;
1117 rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
1118
1119 spin_lock(&zcrypt_list_lock);
1120 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1121 spin_unlock(&zcrypt_list_lock);
1122
1123 out_free:
1124 kfree(targets);
1125 out:
1126 ap_release_message(&ap_msg);
1127 if (tr) {
1128 tr->last_rc = rc;
1129 tr->last_qid = qid;
1130 }
1131 trace_s390_zcrypt_rep(xcrb, func_code, rc,
1132 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1133 return rc;
1134 }
1135
1136 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1137 {
1138 return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb);
1139 }
1140 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1141
1142 static long zcrypt_rng(char *buffer)
1143 {
1144 struct zcrypt_card *zc, *pref_zc;
1145 struct zcrypt_queue *zq, *pref_zq;
1146 unsigned int wgt = 0, pref_wgt = 0;
1147 unsigned int func_code;
1148 struct ap_message ap_msg;
1149 unsigned int domain;
1150 int qid = 0, rc = -ENODEV;
1151 struct module *mod;
1152
1153 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1154
1155 ap_init_message(&ap_msg);
1156 rc = get_rng_fc(&ap_msg, &func_code, &domain);
1157 if (rc)
1158 goto out;
1159
1160 pref_zc = NULL;
1161 pref_zq = NULL;
1162 spin_lock(&zcrypt_list_lock);
1163 for_each_zcrypt_card(zc) {
1164 /* Check for useable CCA card */
1165 if (!zc->online || !zc->card->config ||
1166 !(zc->card->functions & 0x10000000))
1167 continue;
1168 /* get weight index of the card device */
1169 wgt = zc->speed_rating[func_code];
1170 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
1171 continue;
1172 for_each_zcrypt_queue(zq, zc) {
1173 /* check if device is useable and eligible */
1174 if (!zq->online || !zq->ops->rng ||
1175 !zq->queue->config)
1176 continue;
1177 if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
1178 continue;
1179 pref_zc = zc;
1180 pref_zq = zq;
1181 pref_wgt = wgt;
1182 }
1183 }
1184 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1185 spin_unlock(&zcrypt_list_lock);
1186
1187 if (!pref_zq) {
1188 rc = -ENODEV;
1189 goto out;
1190 }
1191
1192 qid = pref_zq->queue->qid;
1193 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1194
1195 spin_lock(&zcrypt_list_lock);
1196 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1197 spin_unlock(&zcrypt_list_lock);
1198
1199 out:
1200 ap_release_message(&ap_msg);
1201 trace_s390_zcrypt_rep(buffer, func_code, rc,
1202 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1203 return rc;
1204 }
1205
1206 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1207 {
1208 struct zcrypt_card *zc;
1209 struct zcrypt_queue *zq;
1210 struct zcrypt_device_status *stat;
1211 int card, queue;
1212
1213 memset(devstatus, 0, MAX_ZDEV_ENTRIES
1214 * sizeof(struct zcrypt_device_status));
1215
1216 spin_lock(&zcrypt_list_lock);
1217 for_each_zcrypt_card(zc) {
1218 for_each_zcrypt_queue(zq, zc) {
1219 card = AP_QID_CARD(zq->queue->qid);
1220 if (card >= MAX_ZDEV_CARDIDS)
1221 continue;
1222 queue = AP_QID_QUEUE(zq->queue->qid);
1223 stat = &devstatus[card * AP_DOMAINS + queue];
1224 stat->hwtype = zc->card->ap_dev.device_type;
1225 stat->functions = zc->card->functions >> 26;
1226 stat->qid = zq->queue->qid;
1227 stat->online = zq->online ? 0x01 : 0x00;
1228 }
1229 }
1230 spin_unlock(&zcrypt_list_lock);
1231 }
1232
1233 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1234 {
1235 struct zcrypt_card *zc;
1236 struct zcrypt_queue *zq;
1237 struct zcrypt_device_status_ext *stat;
1238 int card, queue;
1239
1240 memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1241 * sizeof(struct zcrypt_device_status_ext));
1242
1243 spin_lock(&zcrypt_list_lock);
1244 for_each_zcrypt_card(zc) {
1245 for_each_zcrypt_queue(zq, zc) {
1246 card = AP_QID_CARD(zq->queue->qid);
1247 queue = AP_QID_QUEUE(zq->queue->qid);
1248 stat = &devstatus[card * AP_DOMAINS + queue];
1249 stat->hwtype = zc->card->ap_dev.device_type;
1250 stat->functions = zc->card->functions >> 26;
1251 stat->qid = zq->queue->qid;
1252 stat->online = zq->online ? 0x01 : 0x00;
1253 }
1254 }
1255 spin_unlock(&zcrypt_list_lock);
1256 }
1257 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1258
1259 int zcrypt_device_status_ext(int card, int queue,
1260 struct zcrypt_device_status_ext *devstat)
1261 {
1262 struct zcrypt_card *zc;
1263 struct zcrypt_queue *zq;
1264
1265 memset(devstat, 0, sizeof(*devstat));
1266
1267 spin_lock(&zcrypt_list_lock);
1268 for_each_zcrypt_card(zc) {
1269 for_each_zcrypt_queue(zq, zc) {
1270 if (card == AP_QID_CARD(zq->queue->qid) &&
1271 queue == AP_QID_QUEUE(zq->queue->qid)) {
1272 devstat->hwtype = zc->card->ap_dev.device_type;
1273 devstat->functions = zc->card->functions >> 26;
1274 devstat->qid = zq->queue->qid;
1275 devstat->online = zq->online ? 0x01 : 0x00;
1276 spin_unlock(&zcrypt_list_lock);
1277 return 0;
1278 }
1279 }
1280 }
1281 spin_unlock(&zcrypt_list_lock);
1282
1283 return -ENODEV;
1284 }
1285 EXPORT_SYMBOL(zcrypt_device_status_ext);
1286
1287 static void zcrypt_status_mask(char status[], size_t max_adapters)
1288 {
1289 struct zcrypt_card *zc;
1290 struct zcrypt_queue *zq;
1291 int card;
1292
1293 memset(status, 0, max_adapters);
1294 spin_lock(&zcrypt_list_lock);
1295 for_each_zcrypt_card(zc) {
1296 for_each_zcrypt_queue(zq, zc) {
1297 card = AP_QID_CARD(zq->queue->qid);
1298 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1299 || card >= max_adapters)
1300 continue;
1301 status[card] = zc->online ? zc->user_space_type : 0x0d;
1302 }
1303 }
1304 spin_unlock(&zcrypt_list_lock);
1305 }
1306
1307 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1308 {
1309 struct zcrypt_card *zc;
1310 struct zcrypt_queue *zq;
1311 int card;
1312
1313 memset(qdepth, 0, max_adapters);
1314 spin_lock(&zcrypt_list_lock);
1315 local_bh_disable();
1316 for_each_zcrypt_card(zc) {
1317 for_each_zcrypt_queue(zq, zc) {
1318 card = AP_QID_CARD(zq->queue->qid);
1319 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1320 || card >= max_adapters)
1321 continue;
1322 spin_lock(&zq->queue->lock);
1323 qdepth[card] =
1324 zq->queue->pendingq_count +
1325 zq->queue->requestq_count;
1326 spin_unlock(&zq->queue->lock);
1327 }
1328 }
1329 local_bh_enable();
1330 spin_unlock(&zcrypt_list_lock);
1331 }
1332
1333 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1334 {
1335 struct zcrypt_card *zc;
1336 struct zcrypt_queue *zq;
1337 int card;
1338 u64 cnt;
1339
1340 memset(reqcnt, 0, sizeof(int) * max_adapters);
1341 spin_lock(&zcrypt_list_lock);
1342 local_bh_disable();
1343 for_each_zcrypt_card(zc) {
1344 for_each_zcrypt_queue(zq, zc) {
1345 card = AP_QID_CARD(zq->queue->qid);
1346 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1347 || card >= max_adapters)
1348 continue;
1349 spin_lock(&zq->queue->lock);
1350 cnt = zq->queue->total_request_count;
1351 spin_unlock(&zq->queue->lock);
1352 reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX;
1353 }
1354 }
1355 local_bh_enable();
1356 spin_unlock(&zcrypt_list_lock);
1357 }
1358
1359 static int zcrypt_pendingq_count(void)
1360 {
1361 struct zcrypt_card *zc;
1362 struct zcrypt_queue *zq;
1363 int pendingq_count;
1364
1365 pendingq_count = 0;
1366 spin_lock(&zcrypt_list_lock);
1367 local_bh_disable();
1368 for_each_zcrypt_card(zc) {
1369 for_each_zcrypt_queue(zq, zc) {
1370 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1371 continue;
1372 spin_lock(&zq->queue->lock);
1373 pendingq_count += zq->queue->pendingq_count;
1374 spin_unlock(&zq->queue->lock);
1375 }
1376 }
1377 local_bh_enable();
1378 spin_unlock(&zcrypt_list_lock);
1379 return pendingq_count;
1380 }
1381
1382 static int zcrypt_requestq_count(void)
1383 {
1384 struct zcrypt_card *zc;
1385 struct zcrypt_queue *zq;
1386 int requestq_count;
1387
1388 requestq_count = 0;
1389 spin_lock(&zcrypt_list_lock);
1390 local_bh_disable();
1391 for_each_zcrypt_card(zc) {
1392 for_each_zcrypt_queue(zq, zc) {
1393 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1394 continue;
1395 spin_lock(&zq->queue->lock);
1396 requestq_count += zq->queue->requestq_count;
1397 spin_unlock(&zq->queue->lock);
1398 }
1399 }
1400 local_bh_enable();
1401 spin_unlock(&zcrypt_list_lock);
1402 return requestq_count;
1403 }
1404
1405 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1406 {
1407 int rc;
1408 struct zcrypt_track tr;
1409 struct ica_rsa_modexpo mex;
1410 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1411
1412 memset(&tr, 0, sizeof(tr));
1413 if (copy_from_user(&mex, umex, sizeof(mex)))
1414 return -EFAULT;
1415
1416 #ifdef CONFIG_ZCRYPT_DEBUG
1417 if (mex.inputdatalength & (1U << 31)) {
1418 if (!capable(CAP_SYS_ADMIN))
1419 return -EPERM;
1420 tr.fi.cmd = (u16)(mex.inputdatalength >> 16);
1421 }
1422 mex.inputdatalength &= 0x0000FFFF;
1423 #endif
1424
1425 do {
1426 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1427 if (rc == -EAGAIN)
1428 tr.again_counter++;
1429 #ifdef CONFIG_ZCRYPT_DEBUG
1430 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1431 break;
1432 #endif
1433 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1434 /* on failure: retry once again after a requested rescan */
1435 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1436 do {
1437 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1438 if (rc == -EAGAIN)
1439 tr.again_counter++;
1440 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1441 if (rc) {
1442 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1443 return rc;
1444 }
1445 return put_user(mex.outputdatalength, &umex->outputdatalength);
1446 }
1447
1448 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1449 {
1450 int rc;
1451 struct zcrypt_track tr;
1452 struct ica_rsa_modexpo_crt crt;
1453 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1454
1455 memset(&tr, 0, sizeof(tr));
1456 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1457 return -EFAULT;
1458
1459 #ifdef CONFIG_ZCRYPT_DEBUG
1460 if (crt.inputdatalength & (1U << 31)) {
1461 if (!capable(CAP_SYS_ADMIN))
1462 return -EPERM;
1463 tr.fi.cmd = (u16)(crt.inputdatalength >> 16);
1464 }
1465 crt.inputdatalength &= 0x0000FFFF;
1466 #endif
1467
1468 do {
1469 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1470 if (rc == -EAGAIN)
1471 tr.again_counter++;
1472 #ifdef CONFIG_ZCRYPT_DEBUG
1473 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1474 break;
1475 #endif
1476 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1477 /* on failure: retry once again after a requested rescan */
1478 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1479 do {
1480 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1481 if (rc == -EAGAIN)
1482 tr.again_counter++;
1483 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1484 if (rc) {
1485 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1486 return rc;
1487 }
1488 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1489 }
1490
1491 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1492 {
1493 int rc;
1494 struct ica_xcRB xcRB;
1495 struct zcrypt_track tr;
1496 struct ica_xcRB __user *uxcRB = (void __user *) arg;
1497
1498 memset(&tr, 0, sizeof(tr));
1499 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1500 return -EFAULT;
1501
1502 #ifdef CONFIG_ZCRYPT_DEBUG
1503 if (xcRB.status & (1U << 31)) {
1504 if (!capable(CAP_SYS_ADMIN))
1505 return -EPERM;
1506 tr.fi.cmd = (u16)(xcRB.status >> 16);
1507 }
1508 xcRB.status &= 0x0000FFFF;
1509 #endif
1510
1511 do {
1512 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
1513 if (rc == -EAGAIN)
1514 tr.again_counter++;
1515 #ifdef CONFIG_ZCRYPT_DEBUG
1516 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1517 break;
1518 #endif
1519 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1520 /* on failure: retry once again after a requested rescan */
1521 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1522 do {
1523 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
1524 if (rc == -EAGAIN)
1525 tr.again_counter++;
1526 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1527 if (rc)
1528 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1529 rc, xcRB.status);
1530 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1531 return -EFAULT;
1532 return rc;
1533 }
1534
1535 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1536 {
1537 int rc;
1538 struct ep11_urb xcrb;
1539 struct zcrypt_track tr;
1540 struct ep11_urb __user *uxcrb = (void __user *)arg;
1541
1542 memset(&tr, 0, sizeof(tr));
1543 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1544 return -EFAULT;
1545
1546 #ifdef CONFIG_ZCRYPT_DEBUG
1547 if (xcrb.req_len & (1ULL << 63)) {
1548 if (!capable(CAP_SYS_ADMIN))
1549 return -EPERM;
1550 tr.fi.cmd = (u16)(xcrb.req_len >> 48);
1551 }
1552 xcrb.req_len &= 0x0000FFFFFFFFFFFFULL;
1553 #endif
1554
1555 do {
1556 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1557 if (rc == -EAGAIN)
1558 tr.again_counter++;
1559 #ifdef CONFIG_ZCRYPT_DEBUG
1560 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1561 break;
1562 #endif
1563 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1564 /* on failure: retry once again after a requested rescan */
1565 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1566 do {
1567 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1568 if (rc == -EAGAIN)
1569 tr.again_counter++;
1570 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1571 if (rc)
1572 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1573 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1574 return -EFAULT;
1575 return rc;
1576 }
1577
1578 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1579 unsigned long arg)
1580 {
1581 int rc;
1582 struct ap_perms *perms =
1583 (struct ap_perms *) filp->private_data;
1584
1585 rc = zcrypt_check_ioctl(perms, cmd);
1586 if (rc)
1587 return rc;
1588
1589 switch (cmd) {
1590 case ICARSAMODEXPO:
1591 return icarsamodexpo_ioctl(perms, arg);
1592 case ICARSACRT:
1593 return icarsacrt_ioctl(perms, arg);
1594 case ZSECSENDCPRB:
1595 return zsecsendcprb_ioctl(perms, arg);
1596 case ZSENDEP11CPRB:
1597 return zsendep11cprb_ioctl(perms, arg);
1598 case ZCRYPT_DEVICE_STATUS: {
1599 struct zcrypt_device_status_ext *device_status;
1600 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1601 * sizeof(struct zcrypt_device_status_ext);
1602
1603 device_status = kzalloc(total_size, GFP_KERNEL);
1604 if (!device_status)
1605 return -ENOMEM;
1606 zcrypt_device_status_mask_ext(device_status);
1607 if (copy_to_user((char __user *) arg, device_status,
1608 total_size))
1609 rc = -EFAULT;
1610 kfree(device_status);
1611 return rc;
1612 }
1613 case ZCRYPT_STATUS_MASK: {
1614 char status[AP_DEVICES];
1615
1616 zcrypt_status_mask(status, AP_DEVICES);
1617 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1618 return -EFAULT;
1619 return 0;
1620 }
1621 case ZCRYPT_QDEPTH_MASK: {
1622 char qdepth[AP_DEVICES];
1623
1624 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1625 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1626 return -EFAULT;
1627 return 0;
1628 }
1629 case ZCRYPT_PERDEV_REQCNT: {
1630 u32 *reqcnt;
1631
1632 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1633 if (!reqcnt)
1634 return -ENOMEM;
1635 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1636 if (copy_to_user((int __user *) arg, reqcnt,
1637 sizeof(u32) * AP_DEVICES))
1638 rc = -EFAULT;
1639 kfree(reqcnt);
1640 return rc;
1641 }
1642 case Z90STAT_REQUESTQ_COUNT:
1643 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1644 case Z90STAT_PENDINGQ_COUNT:
1645 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1646 case Z90STAT_TOTALOPEN_COUNT:
1647 return put_user(atomic_read(&zcrypt_open_count),
1648 (int __user *) arg);
1649 case Z90STAT_DOMAIN_INDEX:
1650 return put_user(ap_domain_index, (int __user *) arg);
1651 /*
1652 * Deprecated ioctls
1653 */
1654 case ZDEVICESTATUS: {
1655 /* the old ioctl supports only 64 adapters */
1656 struct zcrypt_device_status *device_status;
1657 size_t total_size = MAX_ZDEV_ENTRIES
1658 * sizeof(struct zcrypt_device_status);
1659
1660 device_status = kzalloc(total_size, GFP_KERNEL);
1661 if (!device_status)
1662 return -ENOMEM;
1663 zcrypt_device_status_mask(device_status);
1664 if (copy_to_user((char __user *) arg, device_status,
1665 total_size))
1666 rc = -EFAULT;
1667 kfree(device_status);
1668 return rc;
1669 }
1670 case Z90STAT_STATUS_MASK: {
1671 /* the old ioctl supports only 64 adapters */
1672 char status[MAX_ZDEV_CARDIDS];
1673
1674 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1675 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1676 return -EFAULT;
1677 return 0;
1678 }
1679 case Z90STAT_QDEPTH_MASK: {
1680 /* the old ioctl supports only 64 adapters */
1681 char qdepth[MAX_ZDEV_CARDIDS];
1682
1683 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1684 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1685 return -EFAULT;
1686 return 0;
1687 }
1688 case Z90STAT_PERDEV_REQCNT: {
1689 /* the old ioctl supports only 64 adapters */
1690 u32 reqcnt[MAX_ZDEV_CARDIDS];
1691
1692 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1693 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1694 return -EFAULT;
1695 return 0;
1696 }
1697 /* unknown ioctl number */
1698 default:
1699 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1700 return -ENOIOCTLCMD;
1701 }
1702 }
1703
1704 #ifdef CONFIG_COMPAT
1705 /*
1706 * ioctl32 conversion routines
1707 */
1708 struct compat_ica_rsa_modexpo {
1709 compat_uptr_t inputdata;
1710 unsigned int inputdatalength;
1711 compat_uptr_t outputdata;
1712 unsigned int outputdatalength;
1713 compat_uptr_t b_key;
1714 compat_uptr_t n_modulus;
1715 };
1716
1717 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1718 unsigned int cmd, unsigned long arg)
1719 {
1720 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1721 struct compat_ica_rsa_modexpo mex32;
1722 struct ica_rsa_modexpo mex64;
1723 struct zcrypt_track tr;
1724 long rc;
1725
1726 memset(&tr, 0, sizeof(tr));
1727 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1728 return -EFAULT;
1729 mex64.inputdata = compat_ptr(mex32.inputdata);
1730 mex64.inputdatalength = mex32.inputdatalength;
1731 mex64.outputdata = compat_ptr(mex32.outputdata);
1732 mex64.outputdatalength = mex32.outputdatalength;
1733 mex64.b_key = compat_ptr(mex32.b_key);
1734 mex64.n_modulus = compat_ptr(mex32.n_modulus);
1735 do {
1736 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1737 if (rc == -EAGAIN)
1738 tr.again_counter++;
1739 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1740 /* on failure: retry once again after a requested rescan */
1741 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1742 do {
1743 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1744 if (rc == -EAGAIN)
1745 tr.again_counter++;
1746 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1747 if (rc)
1748 return rc;
1749 return put_user(mex64.outputdatalength,
1750 &umex32->outputdatalength);
1751 }
1752
1753 struct compat_ica_rsa_modexpo_crt {
1754 compat_uptr_t inputdata;
1755 unsigned int inputdatalength;
1756 compat_uptr_t outputdata;
1757 unsigned int outputdatalength;
1758 compat_uptr_t bp_key;
1759 compat_uptr_t bq_key;
1760 compat_uptr_t np_prime;
1761 compat_uptr_t nq_prime;
1762 compat_uptr_t u_mult_inv;
1763 };
1764
1765 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1766 unsigned int cmd, unsigned long arg)
1767 {
1768 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1769 struct compat_ica_rsa_modexpo_crt crt32;
1770 struct ica_rsa_modexpo_crt crt64;
1771 struct zcrypt_track tr;
1772 long rc;
1773
1774 memset(&tr, 0, sizeof(tr));
1775 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1776 return -EFAULT;
1777 crt64.inputdata = compat_ptr(crt32.inputdata);
1778 crt64.inputdatalength = crt32.inputdatalength;
1779 crt64.outputdata = compat_ptr(crt32.outputdata);
1780 crt64.outputdatalength = crt32.outputdatalength;
1781 crt64.bp_key = compat_ptr(crt32.bp_key);
1782 crt64.bq_key = compat_ptr(crt32.bq_key);
1783 crt64.np_prime = compat_ptr(crt32.np_prime);
1784 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1785 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1786 do {
1787 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1788 if (rc == -EAGAIN)
1789 tr.again_counter++;
1790 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1791 /* on failure: retry once again after a requested rescan */
1792 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1793 do {
1794 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1795 if (rc == -EAGAIN)
1796 tr.again_counter++;
1797 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1798 if (rc)
1799 return rc;
1800 return put_user(crt64.outputdatalength,
1801 &ucrt32->outputdatalength);
1802 }
1803
1804 struct compat_ica_xcRB {
1805 unsigned short agent_ID;
1806 unsigned int user_defined;
1807 unsigned short request_ID;
1808 unsigned int request_control_blk_length;
1809 unsigned char padding1[16 - sizeof(compat_uptr_t)];
1810 compat_uptr_t request_control_blk_addr;
1811 unsigned int request_data_length;
1812 char padding2[16 - sizeof(compat_uptr_t)];
1813 compat_uptr_t request_data_address;
1814 unsigned int reply_control_blk_length;
1815 char padding3[16 - sizeof(compat_uptr_t)];
1816 compat_uptr_t reply_control_blk_addr;
1817 unsigned int reply_data_length;
1818 char padding4[16 - sizeof(compat_uptr_t)];
1819 compat_uptr_t reply_data_addr;
1820 unsigned short priority_window;
1821 unsigned int status;
1822 } __packed;
1823
1824 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1825 unsigned int cmd, unsigned long arg)
1826 {
1827 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1828 struct compat_ica_xcRB xcRB32;
1829 struct zcrypt_track tr;
1830 struct ica_xcRB xcRB64;
1831 long rc;
1832
1833 memset(&tr, 0, sizeof(tr));
1834 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1835 return -EFAULT;
1836 xcRB64.agent_ID = xcRB32.agent_ID;
1837 xcRB64.user_defined = xcRB32.user_defined;
1838 xcRB64.request_ID = xcRB32.request_ID;
1839 xcRB64.request_control_blk_length =
1840 xcRB32.request_control_blk_length;
1841 xcRB64.request_control_blk_addr =
1842 compat_ptr(xcRB32.request_control_blk_addr);
1843 xcRB64.request_data_length =
1844 xcRB32.request_data_length;
1845 xcRB64.request_data_address =
1846 compat_ptr(xcRB32.request_data_address);
1847 xcRB64.reply_control_blk_length =
1848 xcRB32.reply_control_blk_length;
1849 xcRB64.reply_control_blk_addr =
1850 compat_ptr(xcRB32.reply_control_blk_addr);
1851 xcRB64.reply_data_length = xcRB32.reply_data_length;
1852 xcRB64.reply_data_addr =
1853 compat_ptr(xcRB32.reply_data_addr);
1854 xcRB64.priority_window = xcRB32.priority_window;
1855 xcRB64.status = xcRB32.status;
1856 do {
1857 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
1858 if (rc == -EAGAIN)
1859 tr.again_counter++;
1860 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1861 /* on failure: retry once again after a requested rescan */
1862 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1863 do {
1864 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
1865 if (rc == -EAGAIN)
1866 tr.again_counter++;
1867 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1868 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1869 xcRB32.reply_data_length = xcRB64.reply_data_length;
1870 xcRB32.status = xcRB64.status;
1871 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1872 return -EFAULT;
1873 return rc;
1874 }
1875
1876 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1877 unsigned long arg)
1878 {
1879 int rc;
1880 struct ap_perms *perms =
1881 (struct ap_perms *) filp->private_data;
1882
1883 rc = zcrypt_check_ioctl(perms, cmd);
1884 if (rc)
1885 return rc;
1886
1887 if (cmd == ICARSAMODEXPO)
1888 return trans_modexpo32(perms, filp, cmd, arg);
1889 if (cmd == ICARSACRT)
1890 return trans_modexpo_crt32(perms, filp, cmd, arg);
1891 if (cmd == ZSECSENDCPRB)
1892 return trans_xcRB32(perms, filp, cmd, arg);
1893 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1894 }
1895 #endif
1896
1897 /*
1898 * Misc device file operations.
1899 */
1900 static const struct file_operations zcrypt_fops = {
1901 .owner = THIS_MODULE,
1902 .read = zcrypt_read,
1903 .write = zcrypt_write,
1904 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1905 #ifdef CONFIG_COMPAT
1906 .compat_ioctl = zcrypt_compat_ioctl,
1907 #endif
1908 .open = zcrypt_open,
1909 .release = zcrypt_release,
1910 .llseek = no_llseek,
1911 };
1912
1913 /*
1914 * Misc device.
1915 */
1916 static struct miscdevice zcrypt_misc_device = {
1917 .minor = MISC_DYNAMIC_MINOR,
1918 .name = "z90crypt",
1919 .fops = &zcrypt_fops,
1920 };
1921
1922 static int zcrypt_rng_device_count;
1923 static u32 *zcrypt_rng_buffer;
1924 static int zcrypt_rng_buffer_index;
1925 static DEFINE_MUTEX(zcrypt_rng_mutex);
1926
1927 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1928 {
1929 int rc;
1930
1931 /*
1932 * We don't need locking here because the RNG API guarantees serialized
1933 * read method calls.
1934 */
1935 if (zcrypt_rng_buffer_index == 0) {
1936 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1937 /* on failure: retry once again after a requested rescan */
1938 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1939 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1940 if (rc < 0)
1941 return -EIO;
1942 zcrypt_rng_buffer_index = rc / sizeof(*data);
1943 }
1944 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1945 return sizeof(*data);
1946 }
1947
1948 static struct hwrng zcrypt_rng_dev = {
1949 .name = "zcrypt",
1950 .data_read = zcrypt_rng_data_read,
1951 .quality = 990,
1952 };
1953
1954 int zcrypt_rng_device_add(void)
1955 {
1956 int rc = 0;
1957
1958 mutex_lock(&zcrypt_rng_mutex);
1959 if (zcrypt_rng_device_count == 0) {
1960 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1961 if (!zcrypt_rng_buffer) {
1962 rc = -ENOMEM;
1963 goto out;
1964 }
1965 zcrypt_rng_buffer_index = 0;
1966 if (!zcrypt_hwrng_seed)
1967 zcrypt_rng_dev.quality = 0;
1968 rc = hwrng_register(&zcrypt_rng_dev);
1969 if (rc)
1970 goto out_free;
1971 zcrypt_rng_device_count = 1;
1972 } else
1973 zcrypt_rng_device_count++;
1974 mutex_unlock(&zcrypt_rng_mutex);
1975 return 0;
1976
1977 out_free:
1978 free_page((unsigned long) zcrypt_rng_buffer);
1979 out:
1980 mutex_unlock(&zcrypt_rng_mutex);
1981 return rc;
1982 }
1983
1984 void zcrypt_rng_device_remove(void)
1985 {
1986 mutex_lock(&zcrypt_rng_mutex);
1987 zcrypt_rng_device_count--;
1988 if (zcrypt_rng_device_count == 0) {
1989 hwrng_unregister(&zcrypt_rng_dev);
1990 free_page((unsigned long) zcrypt_rng_buffer);
1991 }
1992 mutex_unlock(&zcrypt_rng_mutex);
1993 }
1994
1995 /*
1996 * Wait until the zcrypt api is operational.
1997 * The AP bus scan and the binding of ap devices to device drivers is
1998 * an asynchronous job. This function waits until these initial jobs
1999 * are done and so the zcrypt api should be ready to serve crypto
2000 * requests - if there are resources available. The function uses an
2001 * internal timeout of 60s. The very first caller will either wait for
2002 * ap bus bindings complete or the timeout happens. This state will be
2003 * remembered for further callers which will only be blocked until a
2004 * decision is made (timeout or bindings complete).
2005 * On timeout -ETIME is returned, on success the return value is 0.
2006 */
2007 int zcrypt_wait_api_operational(void)
2008 {
2009 static DEFINE_MUTEX(zcrypt_wait_api_lock);
2010 static int zcrypt_wait_api_state;
2011 int rc;
2012
2013 rc = mutex_lock_interruptible(&zcrypt_wait_api_lock);
2014 if (rc)
2015 return rc;
2016
2017 switch (zcrypt_wait_api_state) {
2018 case 0:
2019 /* initial state, invoke wait for the ap bus complete */
2020 rc = ap_wait_init_apqn_bindings_complete(
2021 msecs_to_jiffies(60 * 1000));
2022 switch (rc) {
2023 case 0:
2024 /* ap bus bindings are complete */
2025 zcrypt_wait_api_state = 1;
2026 break;
2027 case -EINTR:
2028 /* interrupted, go back to caller */
2029 break;
2030 case -ETIME:
2031 /* timeout */
2032 ZCRYPT_DBF(DBF_WARN,
2033 "%s ap_wait_init_apqn_bindings_complete() returned with ETIME\n",
2034 __func__);
2035 zcrypt_wait_api_state = -ETIME;
2036 break;
2037 default:
2038 /* other failure */
2039 ZCRYPT_DBF(DBF_DEBUG,
2040 "%s ap_wait_init_apqn_bindings_complete() failure rc=%d\n",
2041 __func__, rc);
2042 break;
2043 }
2044 break;
2045 case 1:
2046 /* a previous caller already found ap bus bindings complete */
2047 rc = 0;
2048 break;
2049 default:
2050 /* a previous caller had timeout or other failure */
2051 rc = zcrypt_wait_api_state;
2052 break;
2053 }
2054
2055 mutex_unlock(&zcrypt_wait_api_lock);
2056
2057 return rc;
2058 }
2059 EXPORT_SYMBOL(zcrypt_wait_api_operational);
2060
2061 int __init zcrypt_debug_init(void)
2062 {
2063 zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
2064 DBF_MAX_SPRINTF_ARGS * sizeof(long));
2065 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
2066 debug_set_level(zcrypt_dbf_info, DBF_ERR);
2067
2068 return 0;
2069 }
2070
2071 void zcrypt_debug_exit(void)
2072 {
2073 debug_unregister(zcrypt_dbf_info);
2074 }
2075
2076 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2077
2078 static int __init zcdn_init(void)
2079 {
2080 int rc;
2081
2082 /* create a new class 'zcrypt' */
2083 zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
2084 if (IS_ERR(zcrypt_class)) {
2085 rc = PTR_ERR(zcrypt_class);
2086 goto out_class_create_failed;
2087 }
2088 zcrypt_class->dev_release = zcdn_device_release;
2089
2090 /* alloc device minor range */
2091 rc = alloc_chrdev_region(&zcrypt_devt,
2092 0, ZCRYPT_MAX_MINOR_NODES,
2093 ZCRYPT_NAME);
2094 if (rc)
2095 goto out_alloc_chrdev_failed;
2096
2097 cdev_init(&zcrypt_cdev, &zcrypt_fops);
2098 zcrypt_cdev.owner = THIS_MODULE;
2099 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2100 if (rc)
2101 goto out_cdev_add_failed;
2102
2103 /* need some class specific sysfs attributes */
2104 rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
2105 if (rc)
2106 goto out_class_create_file_1_failed;
2107 rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
2108 if (rc)
2109 goto out_class_create_file_2_failed;
2110
2111 return 0;
2112
2113 out_class_create_file_2_failed:
2114 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2115 out_class_create_file_1_failed:
2116 cdev_del(&zcrypt_cdev);
2117 out_cdev_add_failed:
2118 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2119 out_alloc_chrdev_failed:
2120 class_destroy(zcrypt_class);
2121 out_class_create_failed:
2122 return rc;
2123 }
2124
2125 static void zcdn_exit(void)
2126 {
2127 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2128 class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
2129 zcdn_destroy_all();
2130 cdev_del(&zcrypt_cdev);
2131 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2132 class_destroy(zcrypt_class);
2133 }
2134
2135 #endif
2136
2137 /**
2138 * zcrypt_api_init(): Module initialization.
2139 *
2140 * The module initialization code.
2141 */
2142 int __init zcrypt_api_init(void)
2143 {
2144 int rc;
2145
2146 rc = zcrypt_debug_init();
2147 if (rc)
2148 goto out;
2149
2150 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2151 rc = zcdn_init();
2152 if (rc)
2153 goto out;
2154 #endif
2155
2156 /* Register the request sprayer. */
2157 rc = misc_register(&zcrypt_misc_device);
2158 if (rc < 0)
2159 goto out_misc_register_failed;
2160
2161 zcrypt_msgtype6_init();
2162 zcrypt_msgtype50_init();
2163
2164 return 0;
2165
2166 out_misc_register_failed:
2167 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2168 zcdn_exit();
2169 #endif
2170 zcrypt_debug_exit();
2171 out:
2172 return rc;
2173 }
2174
2175 /**
2176 * zcrypt_api_exit(): Module termination.
2177 *
2178 * The module termination code.
2179 */
2180 void __exit zcrypt_api_exit(void)
2181 {
2182 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2183 zcdn_exit();
2184 #endif
2185 misc_deregister(&zcrypt_misc_device);
2186 zcrypt_msgtype6_exit();
2187 zcrypt_msgtype50_exit();
2188 zcrypt_ccamisc_exit();
2189 zcrypt_ep11misc_exit();
2190 zcrypt_debug_exit();
2191 }
2192
2193 module_init(zcrypt_api_init);
2194 module_exit(zcrypt_api_exit);
Linux with added FPC-III support