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 #define KMSG_COMPONENT "zcrypt"
16 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
17
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/interrupt.h>
21 #include <linux/miscdevice.h>
22 #include <linux/fs.h>
23 #include <linux/compat.h>
24 #include <linux/slab.h>
25 #include <linux/atomic.h>
26 #include <linux/uaccess.h>
27 #include <linux/hw_random.h>
28 #include <linux/debugfs.h>
29 #include <linux/cdev.h>
30 #include <linux/ctype.h>
31 #include <linux/capability.h>
32 #include <asm/debug.h>
33
34 #define CREATE_TRACE_POINTS
35 #include <asm/trace/zcrypt.h>
36
37 #include "zcrypt_api.h"
38 #include "zcrypt_debug.h"
39
40 #include "zcrypt_msgtype6.h"
41 #include "zcrypt_msgtype50.h"
42 #include "zcrypt_ccamisc.h"
43 #include "zcrypt_ep11misc.h"
44
45 /*
46 * Module description.
47 */
48 MODULE_AUTHOR("IBM Corporation");
49 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
50 "Copyright IBM Corp. 2001, 2012");
51 MODULE_LICENSE("GPL");
52
53 /*
54 * zcrypt tracepoint functions
55 */
56 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
57 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
58
59 DEFINE_SPINLOCK(zcrypt_list_lock);
60 LIST_HEAD(zcrypt_card_list);
61
62 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
63
64 static LIST_HEAD(zcrypt_ops_list);
65
66 /* Zcrypt related debug feature stuff. */
67 debug_info_t *zcrypt_dbf_info;
68
69 /*
70 * Process a rescan of the transport layer.
71 * Runs a synchronous AP bus rescan.
72 * Returns true if something has changed (for example the
73 * bus scan has found and build up new devices) and it is
74 * worth to do a retry. Otherwise false is returned meaning
75 * no changes on the AP bus level.
76 */
zcrypt_process_rescan(void)77 static inline bool zcrypt_process_rescan(void)
78 {
79 return ap_bus_force_rescan();
80 }
81
zcrypt_msgtype_register(struct zcrypt_ops * zops)82 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
83 {
84 list_add_tail(&zops->list, &zcrypt_ops_list);
85 }
86
zcrypt_msgtype_unregister(struct zcrypt_ops * zops)87 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
88 {
89 list_del_init(&zops->list);
90 }
91
zcrypt_msgtype(unsigned char * name,int variant)92 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
93 {
94 struct zcrypt_ops *zops;
95
96 list_for_each_entry(zops, &zcrypt_ops_list, list)
97 if (zops->variant == variant &&
98 (!strncmp(zops->name, name, sizeof(zops->name))))
99 return zops;
100 return NULL;
101 }
102 EXPORT_SYMBOL(zcrypt_msgtype);
103
104 /*
105 * Multi device nodes extension functions.
106 */
107
108 struct zcdn_device;
109
110 static void zcdn_device_release(struct device *dev);
111 static const struct class zcrypt_class = {
112 .name = ZCRYPT_NAME,
113 .dev_release = zcdn_device_release,
114 };
115 static dev_t zcrypt_devt;
116 static struct cdev zcrypt_cdev;
117
118 struct zcdn_device {
119 struct device device;
120 struct ap_perms perms;
121 };
122
123 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
124
125 #define ZCDN_MAX_NAME 32
126
127 static int zcdn_create(const char *name);
128 static int zcdn_destroy(const char *name);
129
130 /*
131 * Find zcdn device by name.
132 * Returns reference to the zcdn device which needs to be released
133 * with put_device() after use.
134 */
find_zcdndev_by_name(const char * name)135 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
136 {
137 struct device *dev = class_find_device_by_name(&zcrypt_class, name);
138
139 return dev ? to_zcdn_dev(dev) : NULL;
140 }
141
142 /*
143 * Find zcdn device by devt value.
144 * Returns reference to the zcdn device which needs to be released
145 * with put_device() after use.
146 */
find_zcdndev_by_devt(dev_t devt)147 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
148 {
149 struct device *dev = class_find_device_by_devt(&zcrypt_class, devt);
150
151 return dev ? to_zcdn_dev(dev) : NULL;
152 }
153
ioctlmask_show(struct device * dev,struct device_attribute * attr,char * buf)154 static ssize_t ioctlmask_show(struct device *dev,
155 struct device_attribute *attr,
156 char *buf)
157 {
158 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
159 int i, n;
160
161 if (mutex_lock_interruptible(&ap_perms_mutex))
162 return -ERESTARTSYS;
163
164 n = sysfs_emit(buf, "0x");
165 for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
166 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.ioctlm[i]);
167 n += sysfs_emit_at(buf, n, "\n");
168
169 mutex_unlock(&ap_perms_mutex);
170
171 return n;
172 }
173
ioctlmask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)174 static ssize_t ioctlmask_store(struct device *dev,
175 struct device_attribute *attr,
176 const char *buf, size_t count)
177 {
178 int rc;
179 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
180
181 rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
182 AP_IOCTLS, &ap_perms_mutex);
183 if (rc)
184 return rc;
185
186 return count;
187 }
188
189 static DEVICE_ATTR_RW(ioctlmask);
190
apmask_show(struct device * dev,struct device_attribute * attr,char * buf)191 static ssize_t apmask_show(struct device *dev,
192 struct device_attribute *attr,
193 char *buf)
194 {
195 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
196 int i, n;
197
198 if (mutex_lock_interruptible(&ap_perms_mutex))
199 return -ERESTARTSYS;
200
201 n = sysfs_emit(buf, "0x");
202 for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
203 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.apm[i]);
204 n += sysfs_emit_at(buf, n, "\n");
205
206 mutex_unlock(&ap_perms_mutex);
207
208 return n;
209 }
210
apmask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)211 static ssize_t apmask_store(struct device *dev,
212 struct device_attribute *attr,
213 const char *buf, size_t count)
214 {
215 int rc;
216 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
217
218 rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
219 AP_DEVICES, &ap_perms_mutex);
220 if (rc)
221 return rc;
222
223 return count;
224 }
225
226 static DEVICE_ATTR_RW(apmask);
227
aqmask_show(struct device * dev,struct device_attribute * attr,char * buf)228 static ssize_t aqmask_show(struct device *dev,
229 struct device_attribute *attr,
230 char *buf)
231 {
232 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
233 int i, n;
234
235 if (mutex_lock_interruptible(&ap_perms_mutex))
236 return -ERESTARTSYS;
237
238 n = sysfs_emit(buf, "0x");
239 for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
240 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.aqm[i]);
241 n += sysfs_emit_at(buf, n, "\n");
242
243 mutex_unlock(&ap_perms_mutex);
244
245 return n;
246 }
247
aqmask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)248 static ssize_t aqmask_store(struct device *dev,
249 struct device_attribute *attr,
250 const char *buf, size_t count)
251 {
252 int rc;
253 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
254
255 rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
256 AP_DOMAINS, &ap_perms_mutex);
257 if (rc)
258 return rc;
259
260 return count;
261 }
262
263 static DEVICE_ATTR_RW(aqmask);
264
admask_show(struct device * dev,struct device_attribute * attr,char * buf)265 static ssize_t admask_show(struct device *dev,
266 struct device_attribute *attr,
267 char *buf)
268 {
269 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
270 int i, n;
271
272 if (mutex_lock_interruptible(&ap_perms_mutex))
273 return -ERESTARTSYS;
274
275 n = sysfs_emit(buf, "0x");
276 for (i = 0; i < sizeof(zcdndev->perms.adm) / sizeof(long); i++)
277 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.adm[i]);
278 n += sysfs_emit_at(buf, n, "\n");
279
280 mutex_unlock(&ap_perms_mutex);
281
282 return n;
283 }
284
admask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)285 static ssize_t admask_store(struct device *dev,
286 struct device_attribute *attr,
287 const char *buf, size_t count)
288 {
289 int rc;
290 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
291
292 rc = ap_parse_mask_str(buf, zcdndev->perms.adm,
293 AP_DOMAINS, &ap_perms_mutex);
294 if (rc)
295 return rc;
296
297 return count;
298 }
299
300 static DEVICE_ATTR_RW(admask);
301
302 static struct attribute *zcdn_dev_attrs[] = {
303 &dev_attr_ioctlmask.attr,
304 &dev_attr_apmask.attr,
305 &dev_attr_aqmask.attr,
306 &dev_attr_admask.attr,
307 NULL
308 };
309
310 static struct attribute_group zcdn_dev_attr_group = {
311 .attrs = zcdn_dev_attrs
312 };
313
314 static const struct attribute_group *zcdn_dev_attr_groups[] = {
315 &zcdn_dev_attr_group,
316 NULL
317 };
318
zcdn_create_store(const struct class * class,const struct class_attribute * attr,const char * buf,size_t count)319 static ssize_t zcdn_create_store(const struct class *class,
320 const struct class_attribute *attr,
321 const char *buf, size_t count)
322 {
323 int rc;
324 char name[ZCDN_MAX_NAME];
325
326 strscpy(name, skip_spaces(buf), sizeof(name));
327
328 rc = zcdn_create(strim(name));
329
330 return rc ? rc : count;
331 }
332
333 static const struct class_attribute class_attr_zcdn_create =
334 __ATTR(create, 0600, NULL, zcdn_create_store);
335
zcdn_destroy_store(const struct class * class,const struct class_attribute * attr,const char * buf,size_t count)336 static ssize_t zcdn_destroy_store(const struct class *class,
337 const struct class_attribute *attr,
338 const char *buf, size_t count)
339 {
340 int rc;
341 char name[ZCDN_MAX_NAME];
342
343 strscpy(name, skip_spaces(buf), sizeof(name));
344
345 rc = zcdn_destroy(strim(name));
346
347 return rc ? rc : count;
348 }
349
350 static const struct class_attribute class_attr_zcdn_destroy =
351 __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
352
zcdn_device_release(struct device * dev)353 static void zcdn_device_release(struct device *dev)
354 {
355 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
356
357 ZCRYPT_DBF_INFO("%s releasing zcdn device %d:%d\n",
358 __func__, MAJOR(dev->devt), MINOR(dev->devt));
359
360 kfree(zcdndev);
361 }
362
zcdn_create(const char * name)363 static int zcdn_create(const char *name)
364 {
365 dev_t devt;
366 int i, rc = 0;
367 struct zcdn_device *zcdndev;
368
369 if (mutex_lock_interruptible(&ap_perms_mutex))
370 return -ERESTARTSYS;
371
372 /* check if device node with this name already exists */
373 if (name[0]) {
374 zcdndev = find_zcdndev_by_name(name);
375 if (zcdndev) {
376 put_device(&zcdndev->device);
377 rc = -EEXIST;
378 goto unlockout;
379 }
380 }
381
382 /* find an unused minor number */
383 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
384 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
385 zcdndev = find_zcdndev_by_devt(devt);
386 if (zcdndev)
387 put_device(&zcdndev->device);
388 else
389 break;
390 }
391 if (i == ZCRYPT_MAX_MINOR_NODES) {
392 rc = -ENOSPC;
393 goto unlockout;
394 }
395
396 /* alloc and prepare a new zcdn device */
397 zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
398 if (!zcdndev) {
399 rc = -ENOMEM;
400 goto unlockout;
401 }
402 zcdndev->device.release = zcdn_device_release;
403 zcdndev->device.class = &zcrypt_class;
404 zcdndev->device.devt = devt;
405 zcdndev->device.groups = zcdn_dev_attr_groups;
406 if (name[0])
407 rc = dev_set_name(&zcdndev->device, "%s", name);
408 else
409 rc = dev_set_name(&zcdndev->device, ZCRYPT_NAME "_%d", (int)MINOR(devt));
410 if (rc) {
411 kfree(zcdndev);
412 goto unlockout;
413 }
414 rc = device_register(&zcdndev->device);
415 if (rc) {
416 put_device(&zcdndev->device);
417 goto unlockout;
418 }
419
420 ZCRYPT_DBF_INFO("%s created zcdn device %d:%d\n",
421 __func__, MAJOR(devt), MINOR(devt));
422
423 unlockout:
424 mutex_unlock(&ap_perms_mutex);
425 return rc;
426 }
427
zcdn_destroy(const char * name)428 static int zcdn_destroy(const char *name)
429 {
430 int rc = 0;
431 struct zcdn_device *zcdndev;
432
433 if (mutex_lock_interruptible(&ap_perms_mutex))
434 return -ERESTARTSYS;
435
436 /* try to find this zcdn device */
437 zcdndev = find_zcdndev_by_name(name);
438 if (!zcdndev) {
439 rc = -ENOENT;
440 goto unlockout;
441 }
442
443 /*
444 * The zcdn device is not hard destroyed. It is subject to
445 * reference counting and thus just needs to be unregistered.
446 */
447 put_device(&zcdndev->device);
448 device_unregister(&zcdndev->device);
449
450 unlockout:
451 mutex_unlock(&ap_perms_mutex);
452 return rc;
453 }
454
zcdn_destroy_all(void)455 static void zcdn_destroy_all(void)
456 {
457 int i;
458 dev_t devt;
459 struct zcdn_device *zcdndev;
460
461 mutex_lock(&ap_perms_mutex);
462 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
463 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
464 zcdndev = find_zcdndev_by_devt(devt);
465 if (zcdndev) {
466 put_device(&zcdndev->device);
467 device_unregister(&zcdndev->device);
468 }
469 }
470 mutex_unlock(&ap_perms_mutex);
471 }
472
473 /*
474 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
475 *
476 * This function is not supported beyond zcrypt 1.3.1.
477 */
zcrypt_read(struct file * filp,char __user * buf,size_t count,loff_t * f_pos)478 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
479 size_t count, loff_t *f_pos)
480 {
481 return -EPERM;
482 }
483
484 /*
485 * zcrypt_write(): Not allowed.
486 *
487 * Write is not allowed
488 */
zcrypt_write(struct file * filp,const char __user * buf,size_t count,loff_t * f_pos)489 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
490 size_t count, loff_t *f_pos)
491 {
492 return -EPERM;
493 }
494
495 /*
496 * zcrypt_open(): Count number of users.
497 *
498 * Device open function to count number of users.
499 */
zcrypt_open(struct inode * inode,struct file * filp)500 static int zcrypt_open(struct inode *inode, struct file *filp)
501 {
502 struct ap_perms *perms = &ap_perms;
503
504 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
505 struct zcdn_device *zcdndev;
506
507 if (mutex_lock_interruptible(&ap_perms_mutex))
508 return -ERESTARTSYS;
509 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
510 /* find returns a reference, no get_device() needed */
511 mutex_unlock(&ap_perms_mutex);
512 if (zcdndev)
513 perms = &zcdndev->perms;
514 }
515 filp->private_data = (void *)perms;
516
517 atomic_inc(&zcrypt_open_count);
518 return stream_open(inode, filp);
519 }
520
521 /*
522 * zcrypt_release(): Count number of users.
523 *
524 * Device close function to count number of users.
525 */
zcrypt_release(struct inode * inode,struct file * filp)526 static int zcrypt_release(struct inode *inode, struct file *filp)
527 {
528 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
529 struct zcdn_device *zcdndev;
530
531 mutex_lock(&ap_perms_mutex);
532 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
533 mutex_unlock(&ap_perms_mutex);
534 if (zcdndev) {
535 /* 2 puts here: one for find, one for open */
536 put_device(&zcdndev->device);
537 put_device(&zcdndev->device);
538 }
539 }
540
541 atomic_dec(&zcrypt_open_count);
542 return 0;
543 }
544
zcrypt_check_ioctl(struct ap_perms * perms,unsigned int cmd)545 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
546 unsigned int cmd)
547 {
548 int rc = -EPERM;
549 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
550
551 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
552 if (test_bit_inv(ioctlnr, perms->ioctlm))
553 rc = 0;
554 }
555
556 if (rc)
557 ZCRYPT_DBF_WARN("%s ioctl check failed: ioctlnr=0x%04x rc=%d\n",
558 __func__, ioctlnr, rc);
559
560 return rc;
561 }
562
zcrypt_check_card(struct ap_perms * perms,int card)563 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
564 {
565 return test_bit_inv(card, perms->apm) ? true : false;
566 }
567
zcrypt_check_queue(struct ap_perms * perms,int queue)568 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
569 {
570 return test_bit_inv(queue, perms->aqm) ? true : false;
571 }
572
zcrypt_pick_queue(struct zcrypt_card * zc,struct zcrypt_queue * zq,struct module ** pmod,unsigned int weight)573 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
574 struct zcrypt_queue *zq,
575 struct module **pmod,
576 unsigned int weight)
577 {
578 if (!zq || !try_module_get(zq->queue->ap_dev.device.driver->owner))
579 return NULL;
580 zcrypt_card_get(zc);
581 zcrypt_queue_get(zq);
582 get_device(&zq->queue->ap_dev.device);
583 atomic_add(weight, &zc->load);
584 atomic_add(weight, &zq->load);
585 zq->request_count++;
586 *pmod = zq->queue->ap_dev.device.driver->owner;
587 return zq;
588 }
589
zcrypt_drop_queue(struct zcrypt_card * zc,struct zcrypt_queue * zq,struct module * mod,unsigned int weight)590 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
591 struct zcrypt_queue *zq,
592 struct module *mod,
593 unsigned int weight)
594 {
595 zq->request_count--;
596 atomic_sub(weight, &zc->load);
597 atomic_sub(weight, &zq->load);
598 put_device(&zq->queue->ap_dev.device);
599 zcrypt_queue_put(zq);
600 zcrypt_card_put(zc);
601 module_put(mod);
602 }
603
zcrypt_card_compare(struct zcrypt_card * zc,struct zcrypt_card * pref_zc,unsigned int weight,unsigned int pref_weight)604 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
605 struct zcrypt_card *pref_zc,
606 unsigned int weight,
607 unsigned int pref_weight)
608 {
609 if (!pref_zc)
610 return true;
611 weight += atomic_read(&zc->load);
612 pref_weight += atomic_read(&pref_zc->load);
613 if (weight == pref_weight)
614 return atomic64_read(&zc->card->total_request_count) <
615 atomic64_read(&pref_zc->card->total_request_count);
616 return weight < pref_weight;
617 }
618
zcrypt_queue_compare(struct zcrypt_queue * zq,struct zcrypt_queue * pref_zq,unsigned int weight,unsigned int pref_weight)619 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
620 struct zcrypt_queue *pref_zq,
621 unsigned int weight,
622 unsigned int pref_weight)
623 {
624 if (!pref_zq)
625 return true;
626 weight += atomic_read(&zq->load);
627 pref_weight += atomic_read(&pref_zq->load);
628 if (weight == pref_weight)
629 return zq->queue->total_request_count <
630 pref_zq->queue->total_request_count;
631 return weight < pref_weight;
632 }
633
634 /*
635 * zcrypt ioctls.
636 */
zcrypt_rsa_modexpo(struct ap_perms * perms,struct zcrypt_track * tr,struct ica_rsa_modexpo * mex)637 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
638 struct zcrypt_track *tr,
639 struct ica_rsa_modexpo *mex)
640 {
641 struct zcrypt_card *zc, *pref_zc;
642 struct zcrypt_queue *zq, *pref_zq;
643 struct ap_message ap_msg;
644 unsigned int wgt = 0, pref_wgt = 0;
645 unsigned int func_code;
646 int cpen, qpen, qid = 0, rc = -ENODEV;
647 struct module *mod;
648
649 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
650
651 ap_init_message(&ap_msg);
652
653 if (mex->outputdatalength < mex->inputdatalength) {
654 func_code = 0;
655 rc = -EINVAL;
656 goto out;
657 }
658
659 /*
660 * As long as outputdatalength is big enough, we can set the
661 * outputdatalength equal to the inputdatalength, since that is the
662 * number of bytes we will copy in any case
663 */
664 mex->outputdatalength = mex->inputdatalength;
665
666 rc = get_rsa_modex_fc(mex, &func_code);
667 if (rc)
668 goto out;
669
670 pref_zc = NULL;
671 pref_zq = NULL;
672 spin_lock(&zcrypt_list_lock);
673 for_each_zcrypt_card(zc) {
674 /* Check for usable accelerator or CCA card */
675 if (!zc->online || !zc->card->config || zc->card->chkstop ||
676 !(zc->card->hwinfo.accel || zc->card->hwinfo.cca))
677 continue;
678 /* Check for size limits */
679 if (zc->min_mod_size > mex->inputdatalength ||
680 zc->max_mod_size < mex->inputdatalength)
681 continue;
682 /* check if device node has admission for this card */
683 if (!zcrypt_check_card(perms, zc->card->id))
684 continue;
685 /* get weight index of the card device */
686 wgt = zc->speed_rating[func_code];
687 /* penalty if this msg was previously sent via this card */
688 cpen = (tr && tr->again_counter && tr->last_qid &&
689 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
690 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
691 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
692 continue;
693 for_each_zcrypt_queue(zq, zc) {
694 /* check if device is usable and eligible */
695 if (!zq->online || !zq->ops->rsa_modexpo ||
696 !ap_queue_usable(zq->queue))
697 continue;
698 /* check if device node has admission for this queue */
699 if (!zcrypt_check_queue(perms,
700 AP_QID_QUEUE(zq->queue->qid)))
701 continue;
702 /* penalty if the msg was previously sent at this qid */
703 qpen = (tr && tr->again_counter && tr->last_qid &&
704 tr->last_qid == zq->queue->qid) ?
705 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
706 if (!zcrypt_queue_compare(zq, pref_zq,
707 wgt + cpen + qpen, pref_wgt))
708 continue;
709 pref_zc = zc;
710 pref_zq = zq;
711 pref_wgt = wgt + cpen + qpen;
712 }
713 }
714 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
715 spin_unlock(&zcrypt_list_lock);
716
717 if (!pref_zq) {
718 pr_debug("no matching queue found => ENODEV\n");
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
zcrypt_rsa_crt(struct ap_perms * perms,struct zcrypt_track * tr,struct ica_rsa_modexpo_crt * crt)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 if (crt->outputdatalength < crt->inputdatalength) {
758 func_code = 0;
759 rc = -EINVAL;
760 goto out;
761 }
762
763 /*
764 * As long as outputdatalength is big enough, we can set the
765 * outputdatalength equal to the inputdatalength, since that is the
766 * number of bytes we will copy in any case
767 */
768 crt->outputdatalength = crt->inputdatalength;
769
770 rc = get_rsa_crt_fc(crt, &func_code);
771 if (rc)
772 goto out;
773
774 pref_zc = NULL;
775 pref_zq = NULL;
776 spin_lock(&zcrypt_list_lock);
777 for_each_zcrypt_card(zc) {
778 /* Check for usable accelerator or CCA card */
779 if (!zc->online || !zc->card->config || zc->card->chkstop ||
780 !(zc->card->hwinfo.accel || zc->card->hwinfo.cca))
781 continue;
782 /* Check for size limits */
783 if (zc->min_mod_size > crt->inputdatalength ||
784 zc->max_mod_size < crt->inputdatalength)
785 continue;
786 /* check if device node has admission for this card */
787 if (!zcrypt_check_card(perms, zc->card->id))
788 continue;
789 /* get weight index of the card device */
790 wgt = zc->speed_rating[func_code];
791 /* penalty if this msg was previously sent via this card */
792 cpen = (tr && tr->again_counter && tr->last_qid &&
793 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
794 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
795 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
796 continue;
797 for_each_zcrypt_queue(zq, zc) {
798 /* check if device is usable and eligible */
799 if (!zq->online || !zq->ops->rsa_modexpo_crt ||
800 !ap_queue_usable(zq->queue))
801 continue;
802 /* check if device node has admission for this queue */
803 if (!zcrypt_check_queue(perms,
804 AP_QID_QUEUE(zq->queue->qid)))
805 continue;
806 /* penalty if the msg was previously sent at this qid */
807 qpen = (tr && tr->again_counter && tr->last_qid &&
808 tr->last_qid == zq->queue->qid) ?
809 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
810 if (!zcrypt_queue_compare(zq, pref_zq,
811 wgt + cpen + qpen, pref_wgt))
812 continue;
813 pref_zc = zc;
814 pref_zq = zq;
815 pref_wgt = wgt + cpen + qpen;
816 }
817 }
818 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
819 spin_unlock(&zcrypt_list_lock);
820
821 if (!pref_zq) {
822 pr_debug("no matching queue found => ENODEV\n");
823 rc = -ENODEV;
824 goto out;
825 }
826
827 qid = pref_zq->queue->qid;
828 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
829
830 spin_lock(&zcrypt_list_lock);
831 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
832 spin_unlock(&zcrypt_list_lock);
833
834 out:
835 ap_release_message(&ap_msg);
836 if (tr) {
837 tr->last_rc = rc;
838 tr->last_qid = qid;
839 }
840 trace_s390_zcrypt_rep(crt, func_code, rc,
841 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
842 return rc;
843 }
844
_zcrypt_send_cprb(bool userspace,struct ap_perms * perms,struct zcrypt_track * tr,struct ica_xcRB * xcrb)845 static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
846 struct zcrypt_track *tr,
847 struct ica_xcRB *xcrb)
848 {
849 struct zcrypt_card *zc, *pref_zc;
850 struct zcrypt_queue *zq, *pref_zq;
851 struct ap_message ap_msg;
852 unsigned int wgt = 0, pref_wgt = 0;
853 unsigned int func_code;
854 unsigned short *domain, tdom;
855 int cpen, qpen, qid = 0, rc = -ENODEV;
856 struct module *mod;
857
858 trace_s390_zcrypt_req(xcrb, TB_ZSECSENDCPRB);
859
860 xcrb->status = 0;
861 ap_init_message(&ap_msg);
862
863 rc = prep_cca_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
864 if (rc)
865 goto out;
866 print_hex_dump_debug("ccareq: ", DUMP_PREFIX_ADDRESS, 16, 1,
867 ap_msg.msg, ap_msg.len, false);
868
869 tdom = *domain;
870 if (perms != &ap_perms && tdom < AP_DOMAINS) {
871 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
872 if (!test_bit_inv(tdom, perms->adm)) {
873 rc = -ENODEV;
874 goto out;
875 }
876 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
877 rc = -EOPNOTSUPP;
878 goto out;
879 }
880 }
881 /*
882 * If a valid target domain is set and this domain is NOT a usage
883 * domain but a control only domain, autoselect target domain.
884 */
885 if (tdom < AP_DOMAINS &&
886 !ap_test_config_usage_domain(tdom) &&
887 ap_test_config_ctrl_domain(tdom))
888 tdom = AUTOSEL_DOM;
889
890 pref_zc = NULL;
891 pref_zq = NULL;
892 spin_lock(&zcrypt_list_lock);
893 for_each_zcrypt_card(zc) {
894 /* Check for usable CCA card */
895 if (!zc->online || !zc->card->config || zc->card->chkstop ||
896 !zc->card->hwinfo.cca)
897 continue;
898 /* Check for user selected CCA card */
899 if (xcrb->user_defined != AUTOSELECT &&
900 xcrb->user_defined != zc->card->id)
901 continue;
902 /* check if request size exceeds card max msg size */
903 if (ap_msg.len > zc->card->maxmsgsize)
904 continue;
905 /* check if device node has admission for this card */
906 if (!zcrypt_check_card(perms, zc->card->id))
907 continue;
908 /* get weight index of the card device */
909 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
910 /* penalty if this msg was previously sent via this card */
911 cpen = (tr && tr->again_counter && tr->last_qid &&
912 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
913 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
914 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
915 continue;
916 for_each_zcrypt_queue(zq, zc) {
917 /* check for device usable and eligible */
918 if (!zq->online || !zq->ops->send_cprb ||
919 !ap_queue_usable(zq->queue) ||
920 (tdom != AUTOSEL_DOM &&
921 tdom != AP_QID_QUEUE(zq->queue->qid)))
922 continue;
923 /* check if device node has admission for this queue */
924 if (!zcrypt_check_queue(perms,
925 AP_QID_QUEUE(zq->queue->qid)))
926 continue;
927 /* penalty if the msg was previously sent at this qid */
928 qpen = (tr && tr->again_counter && tr->last_qid &&
929 tr->last_qid == zq->queue->qid) ?
930 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
931 if (!zcrypt_queue_compare(zq, pref_zq,
932 wgt + cpen + qpen, pref_wgt))
933 continue;
934 pref_zc = zc;
935 pref_zq = zq;
936 pref_wgt = wgt + cpen + qpen;
937 }
938 }
939 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
940 spin_unlock(&zcrypt_list_lock);
941
942 if (!pref_zq) {
943 pr_debug("no match for address %02x.%04x => ENODEV\n",
944 xcrb->user_defined, *domain);
945 rc = -ENODEV;
946 goto out;
947 }
948
949 /* in case of auto select, provide the correct domain */
950 qid = pref_zq->queue->qid;
951 if (*domain == AUTOSEL_DOM)
952 *domain = AP_QID_QUEUE(qid);
953
954 rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcrb, &ap_msg);
955 if (!rc) {
956 print_hex_dump_debug("ccarpl: ", DUMP_PREFIX_ADDRESS, 16, 1,
957 ap_msg.msg, ap_msg.len, false);
958 }
959
960 spin_lock(&zcrypt_list_lock);
961 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
962 spin_unlock(&zcrypt_list_lock);
963
964 out:
965 ap_release_message(&ap_msg);
966 if (tr) {
967 tr->last_rc = rc;
968 tr->last_qid = qid;
969 }
970 trace_s390_zcrypt_rep(xcrb, func_code, rc,
971 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
972 return rc;
973 }
974
zcrypt_send_cprb(struct ica_xcRB * xcrb)975 long zcrypt_send_cprb(struct ica_xcRB *xcrb)
976 {
977 struct zcrypt_track tr;
978 int rc;
979
980 memset(&tr, 0, sizeof(tr));
981
982 do {
983 rc = _zcrypt_send_cprb(false, &ap_perms, &tr, xcrb);
984 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
985
986 /* on ENODEV failure: retry once again after a requested rescan */
987 if (rc == -ENODEV && zcrypt_process_rescan())
988 do {
989 rc = _zcrypt_send_cprb(false, &ap_perms, &tr, xcrb);
990 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
991 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
992 rc = -EIO;
993 if (rc)
994 pr_debug("rc=%d\n", rc);
995
996 return rc;
997 }
998 EXPORT_SYMBOL(zcrypt_send_cprb);
999
is_desired_ep11_card(unsigned int dev_id,unsigned short target_num,struct ep11_target_dev * targets)1000 static bool is_desired_ep11_card(unsigned int dev_id,
1001 unsigned short target_num,
1002 struct ep11_target_dev *targets)
1003 {
1004 while (target_num-- > 0) {
1005 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
1006 return true;
1007 targets++;
1008 }
1009 return false;
1010 }
1011
is_desired_ep11_queue(unsigned int dev_qid,unsigned short target_num,struct ep11_target_dev * targets)1012 static bool is_desired_ep11_queue(unsigned int dev_qid,
1013 unsigned short target_num,
1014 struct ep11_target_dev *targets)
1015 {
1016 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
1017
1018 while (target_num-- > 0) {
1019 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
1020 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
1021 return true;
1022 targets++;
1023 }
1024 return false;
1025 }
1026
_zcrypt_send_ep11_cprb(bool userspace,struct ap_perms * perms,struct zcrypt_track * tr,struct ep11_urb * xcrb)1027 static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
1028 struct zcrypt_track *tr,
1029 struct ep11_urb *xcrb)
1030 {
1031 struct zcrypt_card *zc, *pref_zc;
1032 struct zcrypt_queue *zq, *pref_zq;
1033 struct ep11_target_dev *targets;
1034 unsigned short target_num;
1035 unsigned int wgt = 0, pref_wgt = 0;
1036 unsigned int func_code, domain;
1037 struct ap_message ap_msg;
1038 int cpen, qpen, qid = 0, rc = -ENODEV;
1039 struct module *mod;
1040
1041 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
1042
1043 ap_init_message(&ap_msg);
1044
1045 target_num = (unsigned short)xcrb->targets_num;
1046
1047 /* empty list indicates autoselect (all available targets) */
1048 targets = NULL;
1049 if (target_num != 0) {
1050 struct ep11_target_dev __user *uptr;
1051
1052 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
1053 if (!targets) {
1054 func_code = 0;
1055 rc = -ENOMEM;
1056 goto out;
1057 }
1058
1059 uptr = (struct ep11_target_dev __force __user *)xcrb->targets;
1060 if (z_copy_from_user(userspace, targets, uptr,
1061 target_num * sizeof(*targets))) {
1062 func_code = 0;
1063 rc = -EFAULT;
1064 goto out_free;
1065 }
1066 }
1067
1068 rc = prep_ep11_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
1069 if (rc)
1070 goto out_free;
1071 print_hex_dump_debug("ep11req: ", DUMP_PREFIX_ADDRESS, 16, 1,
1072 ap_msg.msg, ap_msg.len, false);
1073
1074 if (perms != &ap_perms && domain < AUTOSEL_DOM) {
1075 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
1076 if (!test_bit_inv(domain, perms->adm)) {
1077 rc = -ENODEV;
1078 goto out_free;
1079 }
1080 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
1081 rc = -EOPNOTSUPP;
1082 goto out_free;
1083 }
1084 }
1085
1086 pref_zc = NULL;
1087 pref_zq = NULL;
1088 spin_lock(&zcrypt_list_lock);
1089 for_each_zcrypt_card(zc) {
1090 /* Check for usable EP11 card */
1091 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1092 !zc->card->hwinfo.ep11)
1093 continue;
1094 /* Check for user selected EP11 card */
1095 if (targets &&
1096 !is_desired_ep11_card(zc->card->id, target_num, targets))
1097 continue;
1098 /* check if request size exceeds card max msg size */
1099 if (ap_msg.len > zc->card->maxmsgsize)
1100 continue;
1101 /* check if device node has admission for this card */
1102 if (!zcrypt_check_card(perms, zc->card->id))
1103 continue;
1104 /* get weight index of the card device */
1105 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1106 /* penalty if this msg was previously sent via this card */
1107 cpen = (tr && tr->again_counter && tr->last_qid &&
1108 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
1109 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
1110 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
1111 continue;
1112 for_each_zcrypt_queue(zq, zc) {
1113 /* check if device is usable and eligible */
1114 if (!zq->online || !zq->ops->send_ep11_cprb ||
1115 !ap_queue_usable(zq->queue) ||
1116 (targets &&
1117 !is_desired_ep11_queue(zq->queue->qid,
1118 target_num, targets)))
1119 continue;
1120 /* check if device node has admission for this queue */
1121 if (!zcrypt_check_queue(perms,
1122 AP_QID_QUEUE(zq->queue->qid)))
1123 continue;
1124 /* penalty if the msg was previously sent at this qid */
1125 qpen = (tr && tr->again_counter && tr->last_qid &&
1126 tr->last_qid == zq->queue->qid) ?
1127 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
1128 if (!zcrypt_queue_compare(zq, pref_zq,
1129 wgt + cpen + qpen, pref_wgt))
1130 continue;
1131 pref_zc = zc;
1132 pref_zq = zq;
1133 pref_wgt = wgt + cpen + qpen;
1134 }
1135 }
1136 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1137 spin_unlock(&zcrypt_list_lock);
1138
1139 if (!pref_zq) {
1140 if (targets && target_num == 1) {
1141 pr_debug("no match for address %02x.%04x => ENODEV\n",
1142 (int)targets->ap_id, (int)targets->dom_id);
1143 } else if (targets) {
1144 pr_debug("no match for %d target addrs => ENODEV\n",
1145 (int)target_num);
1146 } else {
1147 pr_debug("no match for address ff.ffff => ENODEV\n");
1148 }
1149 rc = -ENODEV;
1150 goto out_free;
1151 }
1152
1153 qid = pref_zq->queue->qid;
1154 rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
1155 if (!rc) {
1156 print_hex_dump_debug("ep11rpl: ", DUMP_PREFIX_ADDRESS, 16, 1,
1157 ap_msg.msg, ap_msg.len, false);
1158 }
1159
1160 spin_lock(&zcrypt_list_lock);
1161 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1162 spin_unlock(&zcrypt_list_lock);
1163
1164 out_free:
1165 kfree(targets);
1166 out:
1167 ap_release_message(&ap_msg);
1168 if (tr) {
1169 tr->last_rc = rc;
1170 tr->last_qid = qid;
1171 }
1172 trace_s390_zcrypt_rep(xcrb, func_code, rc,
1173 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1174 return rc;
1175 }
1176
zcrypt_send_ep11_cprb(struct ep11_urb * xcrb)1177 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1178 {
1179 struct zcrypt_track tr;
1180 int rc;
1181
1182 memset(&tr, 0, sizeof(tr));
1183
1184 do {
1185 rc = _zcrypt_send_ep11_cprb(false, &ap_perms, &tr, xcrb);
1186 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1187
1188 /* on ENODEV failure: retry once again after a requested rescan */
1189 if (rc == -ENODEV && zcrypt_process_rescan())
1190 do {
1191 rc = _zcrypt_send_ep11_cprb(false, &ap_perms, &tr, xcrb);
1192 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1193 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1194 rc = -EIO;
1195 if (rc)
1196 pr_debug("rc=%d\n", rc);
1197
1198 return rc;
1199 }
1200 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1201
zcrypt_rng(char * buffer)1202 static long zcrypt_rng(char *buffer)
1203 {
1204 struct zcrypt_card *zc, *pref_zc;
1205 struct zcrypt_queue *zq, *pref_zq;
1206 unsigned int wgt = 0, pref_wgt = 0;
1207 unsigned int func_code;
1208 struct ap_message ap_msg;
1209 unsigned int domain;
1210 int qid = 0, rc = -ENODEV;
1211 struct module *mod;
1212
1213 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1214
1215 ap_init_message(&ap_msg);
1216 rc = prep_rng_ap_msg(&ap_msg, &func_code, &domain);
1217 if (rc)
1218 goto out;
1219
1220 pref_zc = NULL;
1221 pref_zq = NULL;
1222 spin_lock(&zcrypt_list_lock);
1223 for_each_zcrypt_card(zc) {
1224 /* Check for usable CCA card */
1225 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1226 !zc->card->hwinfo.cca)
1227 continue;
1228 /* get weight index of the card device */
1229 wgt = zc->speed_rating[func_code];
1230 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
1231 continue;
1232 for_each_zcrypt_queue(zq, zc) {
1233 /* check if device is usable and eligible */
1234 if (!zq->online || !zq->ops->rng ||
1235 !ap_queue_usable(zq->queue))
1236 continue;
1237 if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
1238 continue;
1239 pref_zc = zc;
1240 pref_zq = zq;
1241 pref_wgt = wgt;
1242 }
1243 }
1244 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1245 spin_unlock(&zcrypt_list_lock);
1246
1247 if (!pref_zq) {
1248 pr_debug("no matching queue found => ENODEV\n");
1249 rc = -ENODEV;
1250 goto out;
1251 }
1252
1253 qid = pref_zq->queue->qid;
1254 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1255
1256 spin_lock(&zcrypt_list_lock);
1257 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1258 spin_unlock(&zcrypt_list_lock);
1259
1260 out:
1261 ap_release_message(&ap_msg);
1262 trace_s390_zcrypt_rep(buffer, func_code, rc,
1263 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1264 return rc;
1265 }
1266
zcrypt_device_status_mask(struct zcrypt_device_status * devstatus)1267 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1268 {
1269 struct zcrypt_card *zc;
1270 struct zcrypt_queue *zq;
1271 struct zcrypt_device_status *stat;
1272 int card, queue;
1273
1274 memset(devstatus, 0, MAX_ZDEV_ENTRIES
1275 * sizeof(struct zcrypt_device_status));
1276
1277 spin_lock(&zcrypt_list_lock);
1278 for_each_zcrypt_card(zc) {
1279 for_each_zcrypt_queue(zq, zc) {
1280 card = AP_QID_CARD(zq->queue->qid);
1281 if (card >= MAX_ZDEV_CARDIDS)
1282 continue;
1283 queue = AP_QID_QUEUE(zq->queue->qid);
1284 stat = &devstatus[card * AP_DOMAINS + queue];
1285 stat->hwtype = zc->card->ap_dev.device_type;
1286 stat->functions = zc->card->hwinfo.fac >> 26;
1287 stat->qid = zq->queue->qid;
1288 stat->online = zq->online ? 0x01 : 0x00;
1289 }
1290 }
1291 spin_unlock(&zcrypt_list_lock);
1292 }
1293
zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext * devstatus)1294 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1295 {
1296 struct zcrypt_card *zc;
1297 struct zcrypt_queue *zq;
1298 struct zcrypt_device_status_ext *stat;
1299 int card, queue;
1300
1301 spin_lock(&zcrypt_list_lock);
1302 for_each_zcrypt_card(zc) {
1303 for_each_zcrypt_queue(zq, zc) {
1304 card = AP_QID_CARD(zq->queue->qid);
1305 queue = AP_QID_QUEUE(zq->queue->qid);
1306 stat = &devstatus[card * AP_DOMAINS + queue];
1307 stat->hwtype = zc->card->ap_dev.device_type;
1308 stat->functions = zc->card->hwinfo.fac >> 26;
1309 stat->qid = zq->queue->qid;
1310 stat->online = zq->online ? 0x01 : 0x00;
1311 }
1312 }
1313 spin_unlock(&zcrypt_list_lock);
1314 }
1315 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1316
zcrypt_device_status_ext(int card,int queue,struct zcrypt_device_status_ext * devstat)1317 int zcrypt_device_status_ext(int card, int queue,
1318 struct zcrypt_device_status_ext *devstat)
1319 {
1320 struct zcrypt_card *zc;
1321 struct zcrypt_queue *zq;
1322
1323 memset(devstat, 0, sizeof(*devstat));
1324
1325 spin_lock(&zcrypt_list_lock);
1326 for_each_zcrypt_card(zc) {
1327 for_each_zcrypt_queue(zq, zc) {
1328 if (card == AP_QID_CARD(zq->queue->qid) &&
1329 queue == AP_QID_QUEUE(zq->queue->qid)) {
1330 devstat->hwtype = zc->card->ap_dev.device_type;
1331 devstat->functions = zc->card->hwinfo.fac >> 26;
1332 devstat->qid = zq->queue->qid;
1333 devstat->online = zq->online ? 0x01 : 0x00;
1334 spin_unlock(&zcrypt_list_lock);
1335 return 0;
1336 }
1337 }
1338 }
1339 spin_unlock(&zcrypt_list_lock);
1340
1341 return -ENODEV;
1342 }
1343 EXPORT_SYMBOL(zcrypt_device_status_ext);
1344
zcrypt_status_mask(char status[],size_t max_adapters)1345 static void zcrypt_status_mask(char status[], size_t max_adapters)
1346 {
1347 struct zcrypt_card *zc;
1348 struct zcrypt_queue *zq;
1349 int card;
1350
1351 memset(status, 0, max_adapters);
1352 spin_lock(&zcrypt_list_lock);
1353 for_each_zcrypt_card(zc) {
1354 for_each_zcrypt_queue(zq, zc) {
1355 card = AP_QID_CARD(zq->queue->qid);
1356 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1357 card >= max_adapters)
1358 continue;
1359 status[card] = zc->online ? zc->user_space_type : 0x0d;
1360 }
1361 }
1362 spin_unlock(&zcrypt_list_lock);
1363 }
1364
zcrypt_qdepth_mask(char qdepth[],size_t max_adapters)1365 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1366 {
1367 struct zcrypt_card *zc;
1368 struct zcrypt_queue *zq;
1369 int card;
1370
1371 memset(qdepth, 0, max_adapters);
1372 spin_lock(&zcrypt_list_lock);
1373 local_bh_disable();
1374 for_each_zcrypt_card(zc) {
1375 for_each_zcrypt_queue(zq, zc) {
1376 card = AP_QID_CARD(zq->queue->qid);
1377 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1378 card >= max_adapters)
1379 continue;
1380 spin_lock(&zq->queue->lock);
1381 qdepth[card] =
1382 zq->queue->pendingq_count +
1383 zq->queue->requestq_count;
1384 spin_unlock(&zq->queue->lock);
1385 }
1386 }
1387 local_bh_enable();
1388 spin_unlock(&zcrypt_list_lock);
1389 }
1390
zcrypt_perdev_reqcnt(u32 reqcnt[],size_t max_adapters)1391 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1392 {
1393 struct zcrypt_card *zc;
1394 struct zcrypt_queue *zq;
1395 int card;
1396 u64 cnt;
1397
1398 memset(reqcnt, 0, sizeof(int) * max_adapters);
1399 spin_lock(&zcrypt_list_lock);
1400 local_bh_disable();
1401 for_each_zcrypt_card(zc) {
1402 for_each_zcrypt_queue(zq, zc) {
1403 card = AP_QID_CARD(zq->queue->qid);
1404 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1405 card >= max_adapters)
1406 continue;
1407 spin_lock(&zq->queue->lock);
1408 cnt = zq->queue->total_request_count;
1409 spin_unlock(&zq->queue->lock);
1410 reqcnt[card] = (cnt < UINT_MAX) ? (u32)cnt : UINT_MAX;
1411 }
1412 }
1413 local_bh_enable();
1414 spin_unlock(&zcrypt_list_lock);
1415 }
1416
zcrypt_pendingq_count(void)1417 static int zcrypt_pendingq_count(void)
1418 {
1419 struct zcrypt_card *zc;
1420 struct zcrypt_queue *zq;
1421 int pendingq_count;
1422
1423 pendingq_count = 0;
1424 spin_lock(&zcrypt_list_lock);
1425 local_bh_disable();
1426 for_each_zcrypt_card(zc) {
1427 for_each_zcrypt_queue(zq, zc) {
1428 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1429 continue;
1430 spin_lock(&zq->queue->lock);
1431 pendingq_count += zq->queue->pendingq_count;
1432 spin_unlock(&zq->queue->lock);
1433 }
1434 }
1435 local_bh_enable();
1436 spin_unlock(&zcrypt_list_lock);
1437 return pendingq_count;
1438 }
1439
zcrypt_requestq_count(void)1440 static int zcrypt_requestq_count(void)
1441 {
1442 struct zcrypt_card *zc;
1443 struct zcrypt_queue *zq;
1444 int requestq_count;
1445
1446 requestq_count = 0;
1447 spin_lock(&zcrypt_list_lock);
1448 local_bh_disable();
1449 for_each_zcrypt_card(zc) {
1450 for_each_zcrypt_queue(zq, zc) {
1451 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1452 continue;
1453 spin_lock(&zq->queue->lock);
1454 requestq_count += zq->queue->requestq_count;
1455 spin_unlock(&zq->queue->lock);
1456 }
1457 }
1458 local_bh_enable();
1459 spin_unlock(&zcrypt_list_lock);
1460 return requestq_count;
1461 }
1462
icarsamodexpo_ioctl(struct ap_perms * perms,unsigned long arg)1463 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1464 {
1465 int rc;
1466 struct zcrypt_track tr;
1467 struct ica_rsa_modexpo mex;
1468 struct ica_rsa_modexpo __user *umex = (void __user *)arg;
1469
1470 memset(&tr, 0, sizeof(tr));
1471 if (copy_from_user(&mex, umex, sizeof(mex)))
1472 return -EFAULT;
1473
1474 do {
1475 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1476 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1477
1478 /* on ENODEV failure: retry once again after a requested rescan */
1479 if (rc == -ENODEV && zcrypt_process_rescan())
1480 do {
1481 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1482 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1483 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1484 rc = -EIO;
1485 if (rc) {
1486 pr_debug("ioctl ICARSAMODEXPO rc=%d\n", rc);
1487 return rc;
1488 }
1489 return put_user(mex.outputdatalength, &umex->outputdatalength);
1490 }
1491
icarsacrt_ioctl(struct ap_perms * perms,unsigned long arg)1492 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1493 {
1494 int rc;
1495 struct zcrypt_track tr;
1496 struct ica_rsa_modexpo_crt crt;
1497 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *)arg;
1498
1499 memset(&tr, 0, sizeof(tr));
1500 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1501 return -EFAULT;
1502
1503 do {
1504 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1505 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1506
1507 /* on ENODEV failure: retry once again after a requested rescan */
1508 if (rc == -ENODEV && zcrypt_process_rescan())
1509 do {
1510 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1511 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1512 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1513 rc = -EIO;
1514 if (rc) {
1515 pr_debug("ioctl ICARSACRT rc=%d\n", rc);
1516 return rc;
1517 }
1518 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1519 }
1520
zsecsendcprb_ioctl(struct ap_perms * perms,unsigned long arg)1521 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1522 {
1523 int rc;
1524 struct ica_xcRB xcrb;
1525 struct zcrypt_track tr;
1526 struct ica_xcRB __user *uxcrb = (void __user *)arg;
1527
1528 memset(&tr, 0, sizeof(tr));
1529 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1530 return -EFAULT;
1531
1532 do {
1533 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1534 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1535
1536 /* on ENODEV failure: retry once again after a requested rescan */
1537 if (rc == -ENODEV && zcrypt_process_rescan())
1538 do {
1539 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1540 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1541 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1542 rc = -EIO;
1543 if (rc)
1544 pr_debug("ioctl ZSENDCPRB rc=%d status=0x%x\n",
1545 rc, xcrb.status);
1546 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1547 return -EFAULT;
1548 return rc;
1549 }
1550
zsendep11cprb_ioctl(struct ap_perms * perms,unsigned long arg)1551 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1552 {
1553 int rc;
1554 struct ep11_urb xcrb;
1555 struct zcrypt_track tr;
1556 struct ep11_urb __user *uxcrb = (void __user *)arg;
1557
1558 memset(&tr, 0, sizeof(tr));
1559 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1560 return -EFAULT;
1561
1562 do {
1563 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1564 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1565
1566 /* on ENODEV failure: retry once again after a requested rescan */
1567 if (rc == -ENODEV && zcrypt_process_rescan())
1568 do {
1569 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1570 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1571 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1572 rc = -EIO;
1573 if (rc)
1574 pr_debug("ioctl ZSENDEP11CPRB rc=%d\n", rc);
1575 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1576 return -EFAULT;
1577 return rc;
1578 }
1579
zcrypt_unlocked_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1580 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1581 unsigned long arg)
1582 {
1583 int rc;
1584 struct ap_perms *perms =
1585 (struct ap_perms *)filp->private_data;
1586
1587 rc = zcrypt_check_ioctl(perms, cmd);
1588 if (rc)
1589 return rc;
1590
1591 switch (cmd) {
1592 case ICARSAMODEXPO:
1593 return icarsamodexpo_ioctl(perms, arg);
1594 case ICARSACRT:
1595 return icarsacrt_ioctl(perms, arg);
1596 case ZSECSENDCPRB:
1597 return zsecsendcprb_ioctl(perms, arg);
1598 case ZSENDEP11CPRB:
1599 return zsendep11cprb_ioctl(perms, arg);
1600 case ZCRYPT_DEVICE_STATUS: {
1601 struct zcrypt_device_status_ext *device_status;
1602 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1603 * sizeof(struct zcrypt_device_status_ext);
1604
1605 device_status = kvcalloc(MAX_ZDEV_ENTRIES_EXT,
1606 sizeof(struct zcrypt_device_status_ext),
1607 GFP_KERNEL);
1608 if (!device_status)
1609 return -ENOMEM;
1610 zcrypt_device_status_mask_ext(device_status);
1611 if (copy_to_user((char __user *)arg, device_status,
1612 total_size))
1613 rc = -EFAULT;
1614 kvfree(device_status);
1615 return rc;
1616 }
1617 case ZCRYPT_STATUS_MASK: {
1618 char status[AP_DEVICES];
1619
1620 zcrypt_status_mask(status, AP_DEVICES);
1621 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1622 return -EFAULT;
1623 return 0;
1624 }
1625 case ZCRYPT_QDEPTH_MASK: {
1626 char qdepth[AP_DEVICES];
1627
1628 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1629 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1630 return -EFAULT;
1631 return 0;
1632 }
1633 case ZCRYPT_PERDEV_REQCNT: {
1634 u32 *reqcnt;
1635
1636 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1637 if (!reqcnt)
1638 return -ENOMEM;
1639 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1640 if (copy_to_user((int __user *)arg, reqcnt,
1641 sizeof(u32) * AP_DEVICES))
1642 rc = -EFAULT;
1643 kfree(reqcnt);
1644 return rc;
1645 }
1646 case Z90STAT_REQUESTQ_COUNT:
1647 return put_user(zcrypt_requestq_count(), (int __user *)arg);
1648 case Z90STAT_PENDINGQ_COUNT:
1649 return put_user(zcrypt_pendingq_count(), (int __user *)arg);
1650 case Z90STAT_TOTALOPEN_COUNT:
1651 return put_user(atomic_read(&zcrypt_open_count),
1652 (int __user *)arg);
1653 case Z90STAT_DOMAIN_INDEX:
1654 return put_user(ap_domain_index, (int __user *)arg);
1655 /*
1656 * Deprecated ioctls
1657 */
1658 case ZDEVICESTATUS: {
1659 /* the old ioctl supports only 64 adapters */
1660 struct zcrypt_device_status *device_status;
1661 size_t total_size = MAX_ZDEV_ENTRIES
1662 * sizeof(struct zcrypt_device_status);
1663
1664 device_status = kzalloc(total_size, GFP_KERNEL);
1665 if (!device_status)
1666 return -ENOMEM;
1667 zcrypt_device_status_mask(device_status);
1668 if (copy_to_user((char __user *)arg, device_status,
1669 total_size))
1670 rc = -EFAULT;
1671 kfree(device_status);
1672 return rc;
1673 }
1674 case Z90STAT_STATUS_MASK: {
1675 /* the old ioctl supports only 64 adapters */
1676 char status[MAX_ZDEV_CARDIDS];
1677
1678 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1679 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1680 return -EFAULT;
1681 return 0;
1682 }
1683 case Z90STAT_QDEPTH_MASK: {
1684 /* the old ioctl supports only 64 adapters */
1685 char qdepth[MAX_ZDEV_CARDIDS];
1686
1687 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1688 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1689 return -EFAULT;
1690 return 0;
1691 }
1692 case Z90STAT_PERDEV_REQCNT: {
1693 /* the old ioctl supports only 64 adapters */
1694 u32 reqcnt[MAX_ZDEV_CARDIDS];
1695
1696 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1697 if (copy_to_user((int __user *)arg, reqcnt, sizeof(reqcnt)))
1698 return -EFAULT;
1699 return 0;
1700 }
1701 /* unknown ioctl number */
1702 default:
1703 pr_debug("unknown ioctl 0x%08x\n", cmd);
1704 return -ENOIOCTLCMD;
1705 }
1706 }
1707
1708 #ifdef CONFIG_COMPAT
1709 /*
1710 * ioctl32 conversion routines
1711 */
1712 struct compat_ica_rsa_modexpo {
1713 compat_uptr_t inputdata;
1714 unsigned int inputdatalength;
1715 compat_uptr_t outputdata;
1716 unsigned int outputdatalength;
1717 compat_uptr_t b_key;
1718 compat_uptr_t n_modulus;
1719 };
1720
trans_modexpo32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1721 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1722 unsigned int cmd, unsigned long arg)
1723 {
1724 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1725 struct compat_ica_rsa_modexpo mex32;
1726 struct ica_rsa_modexpo mex64;
1727 struct zcrypt_track tr;
1728 long rc;
1729
1730 memset(&tr, 0, sizeof(tr));
1731 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1732 return -EFAULT;
1733 mex64.inputdata = compat_ptr(mex32.inputdata);
1734 mex64.inputdatalength = mex32.inputdatalength;
1735 mex64.outputdata = compat_ptr(mex32.outputdata);
1736 mex64.outputdatalength = mex32.outputdatalength;
1737 mex64.b_key = compat_ptr(mex32.b_key);
1738 mex64.n_modulus = compat_ptr(mex32.n_modulus);
1739 do {
1740 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1741 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1742
1743 /* on ENODEV failure: retry once again after a requested rescan */
1744 if (rc == -ENODEV && zcrypt_process_rescan())
1745 do {
1746 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1747 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1748 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1749 rc = -EIO;
1750 if (rc)
1751 return rc;
1752 return put_user(mex64.outputdatalength,
1753 &umex32->outputdatalength);
1754 }
1755
1756 struct compat_ica_rsa_modexpo_crt {
1757 compat_uptr_t inputdata;
1758 unsigned int inputdatalength;
1759 compat_uptr_t outputdata;
1760 unsigned int outputdatalength;
1761 compat_uptr_t bp_key;
1762 compat_uptr_t bq_key;
1763 compat_uptr_t np_prime;
1764 compat_uptr_t nq_prime;
1765 compat_uptr_t u_mult_inv;
1766 };
1767
trans_modexpo_crt32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1768 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1769 unsigned int cmd, unsigned long arg)
1770 {
1771 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1772 struct compat_ica_rsa_modexpo_crt crt32;
1773 struct ica_rsa_modexpo_crt crt64;
1774 struct zcrypt_track tr;
1775 long rc;
1776
1777 memset(&tr, 0, sizeof(tr));
1778 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1779 return -EFAULT;
1780 crt64.inputdata = compat_ptr(crt32.inputdata);
1781 crt64.inputdatalength = crt32.inputdatalength;
1782 crt64.outputdata = compat_ptr(crt32.outputdata);
1783 crt64.outputdatalength = crt32.outputdatalength;
1784 crt64.bp_key = compat_ptr(crt32.bp_key);
1785 crt64.bq_key = compat_ptr(crt32.bq_key);
1786 crt64.np_prime = compat_ptr(crt32.np_prime);
1787 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1788 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1789 do {
1790 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1791 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1792
1793 /* on ENODEV failure: retry once again after a requested rescan */
1794 if (rc == -ENODEV && zcrypt_process_rescan())
1795 do {
1796 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1797 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1798 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1799 rc = -EIO;
1800 if (rc)
1801 return rc;
1802 return put_user(crt64.outputdatalength,
1803 &ucrt32->outputdatalength);
1804 }
1805
1806 struct compat_ica_xcrb {
1807 unsigned short agent_ID;
1808 unsigned int user_defined;
1809 unsigned short request_ID;
1810 unsigned int request_control_blk_length;
1811 unsigned char padding1[16 - sizeof(compat_uptr_t)];
1812 compat_uptr_t request_control_blk_addr;
1813 unsigned int request_data_length;
1814 char padding2[16 - sizeof(compat_uptr_t)];
1815 compat_uptr_t request_data_address;
1816 unsigned int reply_control_blk_length;
1817 char padding3[16 - sizeof(compat_uptr_t)];
1818 compat_uptr_t reply_control_blk_addr;
1819 unsigned int reply_data_length;
1820 char padding4[16 - sizeof(compat_uptr_t)];
1821 compat_uptr_t reply_data_addr;
1822 unsigned short priority_window;
1823 unsigned int status;
1824 } __packed;
1825
trans_xcrb32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1826 static long trans_xcrb32(struct ap_perms *perms, struct file *filp,
1827 unsigned int cmd, unsigned long arg)
1828 {
1829 struct compat_ica_xcrb __user *uxcrb32 = compat_ptr(arg);
1830 struct compat_ica_xcrb xcrb32;
1831 struct zcrypt_track tr;
1832 struct ica_xcRB xcrb64;
1833 long rc;
1834
1835 memset(&tr, 0, sizeof(tr));
1836 if (copy_from_user(&xcrb32, uxcrb32, sizeof(xcrb32)))
1837 return -EFAULT;
1838 xcrb64.agent_ID = xcrb32.agent_ID;
1839 xcrb64.user_defined = xcrb32.user_defined;
1840 xcrb64.request_ID = xcrb32.request_ID;
1841 xcrb64.request_control_blk_length =
1842 xcrb32.request_control_blk_length;
1843 xcrb64.request_control_blk_addr =
1844 compat_ptr(xcrb32.request_control_blk_addr);
1845 xcrb64.request_data_length =
1846 xcrb32.request_data_length;
1847 xcrb64.request_data_address =
1848 compat_ptr(xcrb32.request_data_address);
1849 xcrb64.reply_control_blk_length =
1850 xcrb32.reply_control_blk_length;
1851 xcrb64.reply_control_blk_addr =
1852 compat_ptr(xcrb32.reply_control_blk_addr);
1853 xcrb64.reply_data_length = xcrb32.reply_data_length;
1854 xcrb64.reply_data_addr =
1855 compat_ptr(xcrb32.reply_data_addr);
1856 xcrb64.priority_window = xcrb32.priority_window;
1857 xcrb64.status = xcrb32.status;
1858 do {
1859 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1860 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1861
1862 /* on ENODEV failure: retry once again after a requested rescan */
1863 if (rc == -ENODEV && zcrypt_process_rescan())
1864 do {
1865 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1866 } while (rc == -EAGAIN && ++tr.again_counter < TRACK_AGAIN_MAX);
1867 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1868 rc = -EIO;
1869 xcrb32.reply_control_blk_length = xcrb64.reply_control_blk_length;
1870 xcrb32.reply_data_length = xcrb64.reply_data_length;
1871 xcrb32.status = xcrb64.status;
1872 if (copy_to_user(uxcrb32, &xcrb32, sizeof(xcrb32)))
1873 return -EFAULT;
1874 return rc;
1875 }
1876
zcrypt_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1877 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1878 unsigned long arg)
1879 {
1880 int rc;
1881 struct ap_perms *perms =
1882 (struct ap_perms *)filp->private_data;
1883
1884 rc = zcrypt_check_ioctl(perms, cmd);
1885 if (rc)
1886 return rc;
1887
1888 if (cmd == ICARSAMODEXPO)
1889 return trans_modexpo32(perms, filp, cmd, arg);
1890 if (cmd == ICARSACRT)
1891 return trans_modexpo_crt32(perms, filp, cmd, arg);
1892 if (cmd == ZSECSENDCPRB)
1893 return trans_xcrb32(perms, filp, cmd, arg);
1894 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1895 }
1896 #endif
1897
1898 /*
1899 * Misc device file operations.
1900 */
1901 static const struct file_operations zcrypt_fops = {
1902 .owner = THIS_MODULE,
1903 .read = zcrypt_read,
1904 .write = zcrypt_write,
1905 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1906 #ifdef CONFIG_COMPAT
1907 .compat_ioctl = zcrypt_compat_ioctl,
1908 #endif
1909 .open = zcrypt_open,
1910 .release = zcrypt_release,
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
zcrypt_rng_data_read(struct hwrng * rng,u32 * data)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 ENODEV failure: retry once again after an AP bus 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
zcrypt_rng_device_add(void)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 rc = hwrng_register(&zcrypt_rng_dev);
1967 if (rc)
1968 goto out_free;
1969 zcrypt_rng_device_count = 1;
1970 } else {
1971 zcrypt_rng_device_count++;
1972 }
1973 mutex_unlock(&zcrypt_rng_mutex);
1974 return 0;
1975
1976 out_free:
1977 free_page((unsigned long)zcrypt_rng_buffer);
1978 out:
1979 mutex_unlock(&zcrypt_rng_mutex);
1980 return rc;
1981 }
1982
zcrypt_rng_device_remove(void)1983 void zcrypt_rng_device_remove(void)
1984 {
1985 mutex_lock(&zcrypt_rng_mutex);
1986 zcrypt_rng_device_count--;
1987 if (zcrypt_rng_device_count == 0) {
1988 hwrng_unregister(&zcrypt_rng_dev);
1989 free_page((unsigned long)zcrypt_rng_buffer);
1990 }
1991 mutex_unlock(&zcrypt_rng_mutex);
1992 }
1993
1994 /*
1995 * Wait until the zcrypt api is operational.
1996 * The AP bus scan and the binding of ap devices to device drivers is
1997 * an asynchronous job. This function waits until these initial jobs
1998 * are done and so the zcrypt api should be ready to serve crypto
1999 * requests - if there are resources available. The function uses an
2000 * internal timeout of 30s. The very first caller will either wait for
2001 * ap bus bindings complete or the timeout happens. This state will be
2002 * remembered for further callers which will only be blocked until a
2003 * decision is made (timeout or bindings complete).
2004 * On timeout -ETIME is returned, on success the return value is 0.
2005 */
zcrypt_wait_api_operational(void)2006 int zcrypt_wait_api_operational(void)
2007 {
2008 static DEFINE_MUTEX(zcrypt_wait_api_lock);
2009 static int zcrypt_wait_api_state;
2010 int rc;
2011
2012 rc = mutex_lock_interruptible(&zcrypt_wait_api_lock);
2013 if (rc)
2014 return rc;
2015
2016 switch (zcrypt_wait_api_state) {
2017 case 0:
2018 /* initial state, invoke wait for the ap bus complete */
2019 rc = ap_wait_apqn_bindings_complete(
2020 msecs_to_jiffies(ZCRYPT_WAIT_BINDINGS_COMPLETE_MS));
2021 switch (rc) {
2022 case 0:
2023 /* ap bus bindings are complete */
2024 zcrypt_wait_api_state = 1;
2025 break;
2026 case -EINTR:
2027 /* interrupted, go back to caller */
2028 break;
2029 case -ETIME:
2030 /* timeout */
2031 ZCRYPT_DBF_WARN("%s ap_wait_init_apqn_bindings_complete()=ETIME\n",
2032 __func__);
2033 zcrypt_wait_api_state = -ETIME;
2034 break;
2035 default:
2036 /* other failure */
2037 pr_debug("ap_wait_init_apqn_bindings_complete()=%d\n", rc);
2038 break;
2039 }
2040 break;
2041 case 1:
2042 /* a previous caller already found ap bus bindings complete */
2043 rc = 0;
2044 break;
2045 default:
2046 /* a previous caller had timeout or other failure */
2047 rc = zcrypt_wait_api_state;
2048 break;
2049 }
2050
2051 mutex_unlock(&zcrypt_wait_api_lock);
2052
2053 return rc;
2054 }
2055 EXPORT_SYMBOL(zcrypt_wait_api_operational);
2056
zcrypt_debug_init(void)2057 int __init zcrypt_debug_init(void)
2058 {
2059 zcrypt_dbf_info = debug_register("zcrypt", 2, 1,
2060 ZCRYPT_DBF_MAX_SPRINTF_ARGS * sizeof(long));
2061 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
2062 debug_set_level(zcrypt_dbf_info, DBF_ERR);
2063
2064 return 0;
2065 }
2066
zcrypt_debug_exit(void)2067 void zcrypt_debug_exit(void)
2068 {
2069 debug_unregister(zcrypt_dbf_info);
2070 }
2071
zcdn_init(void)2072 static int __init zcdn_init(void)
2073 {
2074 int rc;
2075
2076 /* create a new class 'zcrypt' */
2077 rc = class_register(&zcrypt_class);
2078 if (rc)
2079 goto out_class_register_failed;
2080
2081 /* alloc device minor range */
2082 rc = alloc_chrdev_region(&zcrypt_devt,
2083 0, ZCRYPT_MAX_MINOR_NODES,
2084 ZCRYPT_NAME);
2085 if (rc)
2086 goto out_alloc_chrdev_failed;
2087
2088 cdev_init(&zcrypt_cdev, &zcrypt_fops);
2089 zcrypt_cdev.owner = THIS_MODULE;
2090 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2091 if (rc)
2092 goto out_cdev_add_failed;
2093
2094 /* need some class specific sysfs attributes */
2095 rc = class_create_file(&zcrypt_class, &class_attr_zcdn_create);
2096 if (rc)
2097 goto out_class_create_file_1_failed;
2098 rc = class_create_file(&zcrypt_class, &class_attr_zcdn_destroy);
2099 if (rc)
2100 goto out_class_create_file_2_failed;
2101
2102 return 0;
2103
2104 out_class_create_file_2_failed:
2105 class_remove_file(&zcrypt_class, &class_attr_zcdn_create);
2106 out_class_create_file_1_failed:
2107 cdev_del(&zcrypt_cdev);
2108 out_cdev_add_failed:
2109 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2110 out_alloc_chrdev_failed:
2111 class_unregister(&zcrypt_class);
2112 out_class_register_failed:
2113 return rc;
2114 }
2115
zcdn_exit(void)2116 static void zcdn_exit(void)
2117 {
2118 class_remove_file(&zcrypt_class, &class_attr_zcdn_create);
2119 class_remove_file(&zcrypt_class, &class_attr_zcdn_destroy);
2120 zcdn_destroy_all();
2121 cdev_del(&zcrypt_cdev);
2122 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2123 class_unregister(&zcrypt_class);
2124 }
2125
2126 /*
2127 * zcrypt_api_init(): Module initialization.
2128 *
2129 * The module initialization code.
2130 */
zcrypt_api_init(void)2131 int __init zcrypt_api_init(void)
2132 {
2133 int rc;
2134
2135 rc = zcrypt_debug_init();
2136 if (rc)
2137 goto out;
2138
2139 rc = zcdn_init();
2140 if (rc)
2141 goto out;
2142
2143 /* Register the request sprayer. */
2144 rc = misc_register(&zcrypt_misc_device);
2145 if (rc < 0)
2146 goto out_misc_register_failed;
2147
2148 zcrypt_msgtype6_init();
2149 zcrypt_msgtype50_init();
2150
2151 return 0;
2152
2153 out_misc_register_failed:
2154 zcdn_exit();
2155 zcrypt_debug_exit();
2156 out:
2157 return rc;
2158 }
2159
2160 /*
2161 * zcrypt_api_exit(): Module termination.
2162 *
2163 * The module termination code.
2164 */
zcrypt_api_exit(void)2165 void __exit zcrypt_api_exit(void)
2166 {
2167 zcdn_exit();
2168 misc_deregister(&zcrypt_misc_device);
2169 zcrypt_msgtype6_exit();
2170 zcrypt_msgtype50_exit();
2171 zcrypt_ccamisc_exit();
2172 zcrypt_ep11misc_exit();
2173 zcrypt_debug_exit();
2174 }
2175
2176 module_init(zcrypt_api_init);
2177 module_exit(zcrypt_api_exit);
2178