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 DEFINE_SPINLOCK(zcrypt_list_lock);
57 LIST_HEAD(zcrypt_card_list);
58
59 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
60 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
61
62 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
63 EXPORT_SYMBOL(zcrypt_rescan_req);
64
65 static LIST_HEAD(zcrypt_ops_list);
66
67 /* Zcrypt related debug feature stuff. */
68 debug_info_t *zcrypt_dbf_info;
69
70 /*
71 * Process a rescan of the transport layer.
72 *
73 * Returns 1, if the rescan has been processed, otherwise 0.
74 */
zcrypt_process_rescan(void)75 static inline int zcrypt_process_rescan(void)
76 {
77 if (atomic_read(&zcrypt_rescan_req)) {
78 atomic_set(&zcrypt_rescan_req, 0);
79 atomic_inc(&zcrypt_rescan_count);
80 ap_bus_force_rescan();
81 ZCRYPT_DBF_INFO("%s rescan count=%07d\n", __func__,
82 atomic_inc_return(&zcrypt_rescan_count));
83 return 1;
84 }
85 return 0;
86 }
87
zcrypt_msgtype_register(struct zcrypt_ops * zops)88 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
89 {
90 list_add_tail(&zops->list, &zcrypt_ops_list);
91 }
92
zcrypt_msgtype_unregister(struct zcrypt_ops * zops)93 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
94 {
95 list_del_init(&zops->list);
96 }
97
zcrypt_msgtype(unsigned char * name,int variant)98 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
99 {
100 struct zcrypt_ops *zops;
101
102 list_for_each_entry(zops, &zcrypt_ops_list, list)
103 if (zops->variant == variant &&
104 (!strncmp(zops->name, name, sizeof(zops->name))))
105 return zops;
106 return NULL;
107 }
108 EXPORT_SYMBOL(zcrypt_msgtype);
109
110 /*
111 * Multi device nodes extension functions.
112 */
113
114 struct zcdn_device;
115
116 static struct class *zcrypt_class;
117 static dev_t zcrypt_devt;
118 static struct cdev zcrypt_cdev;
119
120 struct zcdn_device {
121 struct device device;
122 struct ap_perms perms;
123 };
124
125 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
126
127 #define ZCDN_MAX_NAME 32
128
129 static int zcdn_create(const char *name);
130 static int zcdn_destroy(const char *name);
131
132 /*
133 * Find zcdn device by name.
134 * Returns reference to the zcdn device which needs to be released
135 * with put_device() after use.
136 */
find_zcdndev_by_name(const char * name)137 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
138 {
139 struct device *dev = class_find_device_by_name(zcrypt_class, name);
140
141 return dev ? to_zcdn_dev(dev) : NULL;
142 }
143
144 /*
145 * Find zcdn device by devt value.
146 * Returns reference to the zcdn device which needs to be released
147 * with put_device() after use.
148 */
find_zcdndev_by_devt(dev_t devt)149 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
150 {
151 struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
152
153 return dev ? to_zcdn_dev(dev) : NULL;
154 }
155
ioctlmask_show(struct device * dev,struct device_attribute * attr,char * buf)156 static ssize_t ioctlmask_show(struct device *dev,
157 struct device_attribute *attr,
158 char *buf)
159 {
160 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
161 int i, n;
162
163 if (mutex_lock_interruptible(&ap_perms_mutex))
164 return -ERESTARTSYS;
165
166 n = sysfs_emit(buf, "0x");
167 for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
168 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.ioctlm[i]);
169 n += sysfs_emit_at(buf, n, "\n");
170
171 mutex_unlock(&ap_perms_mutex);
172
173 return n;
174 }
175
ioctlmask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)176 static ssize_t ioctlmask_store(struct device *dev,
177 struct device_attribute *attr,
178 const char *buf, size_t count)
179 {
180 int rc;
181 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
182
183 rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
184 AP_IOCTLS, &ap_perms_mutex);
185 if (rc)
186 return rc;
187
188 return count;
189 }
190
191 static DEVICE_ATTR_RW(ioctlmask);
192
apmask_show(struct device * dev,struct device_attribute * attr,char * buf)193 static ssize_t apmask_show(struct device *dev,
194 struct device_attribute *attr,
195 char *buf)
196 {
197 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
198 int i, n;
199
200 if (mutex_lock_interruptible(&ap_perms_mutex))
201 return -ERESTARTSYS;
202
203 n = sysfs_emit(buf, "0x");
204 for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
205 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.apm[i]);
206 n += sysfs_emit_at(buf, n, "\n");
207
208 mutex_unlock(&ap_perms_mutex);
209
210 return n;
211 }
212
apmask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)213 static ssize_t apmask_store(struct device *dev,
214 struct device_attribute *attr,
215 const char *buf, size_t count)
216 {
217 int rc;
218 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
219
220 rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
221 AP_DEVICES, &ap_perms_mutex);
222 if (rc)
223 return rc;
224
225 return count;
226 }
227
228 static DEVICE_ATTR_RW(apmask);
229
aqmask_show(struct device * dev,struct device_attribute * attr,char * buf)230 static ssize_t aqmask_show(struct device *dev,
231 struct device_attribute *attr,
232 char *buf)
233 {
234 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
235 int i, n;
236
237 if (mutex_lock_interruptible(&ap_perms_mutex))
238 return -ERESTARTSYS;
239
240 n = sysfs_emit(buf, "0x");
241 for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
242 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.aqm[i]);
243 n += sysfs_emit_at(buf, n, "\n");
244
245 mutex_unlock(&ap_perms_mutex);
246
247 return n;
248 }
249
aqmask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)250 static ssize_t aqmask_store(struct device *dev,
251 struct device_attribute *attr,
252 const char *buf, size_t count)
253 {
254 int rc;
255 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
256
257 rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
258 AP_DOMAINS, &ap_perms_mutex);
259 if (rc)
260 return rc;
261
262 return count;
263 }
264
265 static DEVICE_ATTR_RW(aqmask);
266
admask_show(struct device * dev,struct device_attribute * attr,char * buf)267 static ssize_t admask_show(struct device *dev,
268 struct device_attribute *attr,
269 char *buf)
270 {
271 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
272 int i, n;
273
274 if (mutex_lock_interruptible(&ap_perms_mutex))
275 return -ERESTARTSYS;
276
277 n = sysfs_emit(buf, "0x");
278 for (i = 0; i < sizeof(zcdndev->perms.adm) / sizeof(long); i++)
279 n += sysfs_emit_at(buf, n, "%016lx", zcdndev->perms.adm[i]);
280 n += sysfs_emit_at(buf, n, "\n");
281
282 mutex_unlock(&ap_perms_mutex);
283
284 return n;
285 }
286
admask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)287 static ssize_t admask_store(struct device *dev,
288 struct device_attribute *attr,
289 const char *buf, size_t count)
290 {
291 int rc;
292 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
293
294 rc = ap_parse_mask_str(buf, zcdndev->perms.adm,
295 AP_DOMAINS, &ap_perms_mutex);
296 if (rc)
297 return rc;
298
299 return count;
300 }
301
302 static DEVICE_ATTR_RW(admask);
303
304 static struct attribute *zcdn_dev_attrs[] = {
305 &dev_attr_ioctlmask.attr,
306 &dev_attr_apmask.attr,
307 &dev_attr_aqmask.attr,
308 &dev_attr_admask.attr,
309 NULL
310 };
311
312 static struct attribute_group zcdn_dev_attr_group = {
313 .attrs = zcdn_dev_attrs
314 };
315
316 static const struct attribute_group *zcdn_dev_attr_groups[] = {
317 &zcdn_dev_attr_group,
318 NULL
319 };
320
zcdn_create_store(const struct class * class,const struct class_attribute * attr,const char * buf,size_t count)321 static ssize_t zcdn_create_store(const struct class *class,
322 const struct class_attribute *attr,
323 const char *buf, size_t count)
324 {
325 int rc;
326 char name[ZCDN_MAX_NAME];
327
328 strscpy(name, skip_spaces(buf), sizeof(name));
329
330 rc = zcdn_create(strim(name));
331
332 return rc ? rc : count;
333 }
334
335 static const struct class_attribute class_attr_zcdn_create =
336 __ATTR(create, 0600, NULL, zcdn_create_store);
337
zcdn_destroy_store(const struct class * class,const struct class_attribute * attr,const char * buf,size_t count)338 static ssize_t zcdn_destroy_store(const struct class *class,
339 const struct class_attribute *attr,
340 const char *buf, size_t count)
341 {
342 int rc;
343 char name[ZCDN_MAX_NAME];
344
345 strscpy(name, skip_spaces(buf), sizeof(name));
346
347 rc = zcdn_destroy(strim(name));
348
349 return rc ? rc : count;
350 }
351
352 static const struct class_attribute class_attr_zcdn_destroy =
353 __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
354
zcdn_device_release(struct device * dev)355 static void zcdn_device_release(struct device *dev)
356 {
357 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
358
359 ZCRYPT_DBF_INFO("%s releasing zcdn device %d:%d\n",
360 __func__, MAJOR(dev->devt), MINOR(dev->devt));
361
362 kfree(zcdndev);
363 }
364
zcdn_create(const char * name)365 static int zcdn_create(const char *name)
366 {
367 dev_t devt;
368 int i, rc = 0;
369 struct zcdn_device *zcdndev;
370
371 if (mutex_lock_interruptible(&ap_perms_mutex))
372 return -ERESTARTSYS;
373
374 /* check if device node with this name already exists */
375 if (name[0]) {
376 zcdndev = find_zcdndev_by_name(name);
377 if (zcdndev) {
378 put_device(&zcdndev->device);
379 rc = -EEXIST;
380 goto unlockout;
381 }
382 }
383
384 /* find an unused minor number */
385 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
386 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
387 zcdndev = find_zcdndev_by_devt(devt);
388 if (zcdndev)
389 put_device(&zcdndev->device);
390 else
391 break;
392 }
393 if (i == ZCRYPT_MAX_MINOR_NODES) {
394 rc = -ENOSPC;
395 goto unlockout;
396 }
397
398 /* alloc and prepare a new zcdn device */
399 zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
400 if (!zcdndev) {
401 rc = -ENOMEM;
402 goto unlockout;
403 }
404 zcdndev->device.release = zcdn_device_release;
405 zcdndev->device.class = zcrypt_class;
406 zcdndev->device.devt = devt;
407 zcdndev->device.groups = zcdn_dev_attr_groups;
408 if (name[0])
409 rc = dev_set_name(&zcdndev->device, "%s", name);
410 else
411 rc = dev_set_name(&zcdndev->device, ZCRYPT_NAME "_%d", (int)MINOR(devt));
412 if (rc) {
413 kfree(zcdndev);
414 goto unlockout;
415 }
416 rc = device_register(&zcdndev->device);
417 if (rc) {
418 put_device(&zcdndev->device);
419 goto unlockout;
420 }
421
422 ZCRYPT_DBF_INFO("%s created zcdn device %d:%d\n",
423 __func__, MAJOR(devt), MINOR(devt));
424
425 unlockout:
426 mutex_unlock(&ap_perms_mutex);
427 return rc;
428 }
429
zcdn_destroy(const char * name)430 static int zcdn_destroy(const char *name)
431 {
432 int rc = 0;
433 struct zcdn_device *zcdndev;
434
435 if (mutex_lock_interruptible(&ap_perms_mutex))
436 return -ERESTARTSYS;
437
438 /* try to find this zcdn device */
439 zcdndev = find_zcdndev_by_name(name);
440 if (!zcdndev) {
441 rc = -ENOENT;
442 goto unlockout;
443 }
444
445 /*
446 * The zcdn device is not hard destroyed. It is subject to
447 * reference counting and thus just needs to be unregistered.
448 */
449 put_device(&zcdndev->device);
450 device_unregister(&zcdndev->device);
451
452 unlockout:
453 mutex_unlock(&ap_perms_mutex);
454 return rc;
455 }
456
zcdn_destroy_all(void)457 static void zcdn_destroy_all(void)
458 {
459 int i;
460 dev_t devt;
461 struct zcdn_device *zcdndev;
462
463 mutex_lock(&ap_perms_mutex);
464 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
465 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
466 zcdndev = find_zcdndev_by_devt(devt);
467 if (zcdndev) {
468 put_device(&zcdndev->device);
469 device_unregister(&zcdndev->device);
470 }
471 }
472 mutex_unlock(&ap_perms_mutex);
473 }
474
475 /*
476 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
477 *
478 * This function is not supported beyond zcrypt 1.3.1.
479 */
zcrypt_read(struct file * filp,char __user * buf,size_t count,loff_t * f_pos)480 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
481 size_t count, loff_t *f_pos)
482 {
483 return -EPERM;
484 }
485
486 /*
487 * zcrypt_write(): Not allowed.
488 *
489 * Write is not allowed
490 */
zcrypt_write(struct file * filp,const char __user * buf,size_t count,loff_t * f_pos)491 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
492 size_t count, loff_t *f_pos)
493 {
494 return -EPERM;
495 }
496
497 /*
498 * zcrypt_open(): Count number of users.
499 *
500 * Device open function to count number of users.
501 */
zcrypt_open(struct inode * inode,struct file * filp)502 static int zcrypt_open(struct inode *inode, struct file *filp)
503 {
504 struct ap_perms *perms = &ap_perms;
505
506 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
507 struct zcdn_device *zcdndev;
508
509 if (mutex_lock_interruptible(&ap_perms_mutex))
510 return -ERESTARTSYS;
511 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
512 /* find returns a reference, no get_device() needed */
513 mutex_unlock(&ap_perms_mutex);
514 if (zcdndev)
515 perms = &zcdndev->perms;
516 }
517 filp->private_data = (void *)perms;
518
519 atomic_inc(&zcrypt_open_count);
520 return stream_open(inode, filp);
521 }
522
523 /*
524 * zcrypt_release(): Count number of users.
525 *
526 * Device close function to count number of users.
527 */
zcrypt_release(struct inode * inode,struct file * filp)528 static int zcrypt_release(struct inode *inode, struct file *filp)
529 {
530 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
531 struct zcdn_device *zcdndev;
532
533 mutex_lock(&ap_perms_mutex);
534 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
535 mutex_unlock(&ap_perms_mutex);
536 if (zcdndev) {
537 /* 2 puts here: one for find, one for open */
538 put_device(&zcdndev->device);
539 put_device(&zcdndev->device);
540 }
541 }
542
543 atomic_dec(&zcrypt_open_count);
544 return 0;
545 }
546
zcrypt_check_ioctl(struct ap_perms * perms,unsigned int cmd)547 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
548 unsigned int cmd)
549 {
550 int rc = -EPERM;
551 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
552
553 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
554 if (test_bit_inv(ioctlnr, perms->ioctlm))
555 rc = 0;
556 }
557
558 if (rc)
559 ZCRYPT_DBF_WARN("%s ioctl check failed: ioctlnr=0x%04x rc=%d\n",
560 __func__, ioctlnr, rc);
561
562 return rc;
563 }
564
zcrypt_check_card(struct ap_perms * perms,int card)565 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
566 {
567 return test_bit_inv(card, perms->apm) ? true : false;
568 }
569
zcrypt_check_queue(struct ap_perms * perms,int queue)570 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
571 {
572 return test_bit_inv(queue, perms->aqm) ? true : false;
573 }
574
zcrypt_pick_queue(struct zcrypt_card * zc,struct zcrypt_queue * zq,struct module ** pmod,unsigned int weight)575 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
576 struct zcrypt_queue *zq,
577 struct module **pmod,
578 unsigned int weight)
579 {
580 if (!zq || !try_module_get(zq->queue->ap_dev.device.driver->owner))
581 return NULL;
582 zcrypt_card_get(zc);
583 zcrypt_queue_get(zq);
584 get_device(&zq->queue->ap_dev.device);
585 atomic_add(weight, &zc->load);
586 atomic_add(weight, &zq->load);
587 zq->request_count++;
588 *pmod = zq->queue->ap_dev.device.driver->owner;
589 return zq;
590 }
591
zcrypt_drop_queue(struct zcrypt_card * zc,struct zcrypt_queue * zq,struct module * mod,unsigned int weight)592 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
593 struct zcrypt_queue *zq,
594 struct module *mod,
595 unsigned int weight)
596 {
597 zq->request_count--;
598 atomic_sub(weight, &zc->load);
599 atomic_sub(weight, &zq->load);
600 put_device(&zq->queue->ap_dev.device);
601 zcrypt_queue_put(zq);
602 zcrypt_card_put(zc);
603 module_put(mod);
604 }
605
zcrypt_card_compare(struct zcrypt_card * zc,struct zcrypt_card * pref_zc,unsigned int weight,unsigned int pref_weight)606 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
607 struct zcrypt_card *pref_zc,
608 unsigned int weight,
609 unsigned int pref_weight)
610 {
611 if (!pref_zc)
612 return true;
613 weight += atomic_read(&zc->load);
614 pref_weight += atomic_read(&pref_zc->load);
615 if (weight == pref_weight)
616 return atomic64_read(&zc->card->total_request_count) <
617 atomic64_read(&pref_zc->card->total_request_count);
618 return weight < pref_weight;
619 }
620
zcrypt_queue_compare(struct zcrypt_queue * zq,struct zcrypt_queue * pref_zq,unsigned int weight,unsigned int pref_weight)621 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
622 struct zcrypt_queue *pref_zq,
623 unsigned int weight,
624 unsigned int pref_weight)
625 {
626 if (!pref_zq)
627 return true;
628 weight += atomic_read(&zq->load);
629 pref_weight += atomic_read(&pref_zq->load);
630 if (weight == pref_weight)
631 return zq->queue->total_request_count <
632 pref_zq->queue->total_request_count;
633 return weight < pref_weight;
634 }
635
636 /*
637 * zcrypt ioctls.
638 */
zcrypt_rsa_modexpo(struct ap_perms * perms,struct zcrypt_track * tr,struct ica_rsa_modexpo * mex)639 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
640 struct zcrypt_track *tr,
641 struct ica_rsa_modexpo *mex)
642 {
643 struct zcrypt_card *zc, *pref_zc;
644 struct zcrypt_queue *zq, *pref_zq;
645 struct ap_message ap_msg;
646 unsigned int wgt = 0, pref_wgt = 0;
647 unsigned int func_code;
648 int cpen, qpen, qid = 0, rc = -ENODEV;
649 struct module *mod;
650
651 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
652
653 ap_init_message(&ap_msg);
654
655 if (mex->outputdatalength < mex->inputdatalength) {
656 func_code = 0;
657 rc = -EINVAL;
658 goto out;
659 }
660
661 /*
662 * As long as outputdatalength is big enough, we can set the
663 * outputdatalength equal to the inputdatalength, since that is the
664 * number of bytes we will copy in any case
665 */
666 mex->outputdatalength = mex->inputdatalength;
667
668 rc = get_rsa_modex_fc(mex, &func_code);
669 if (rc)
670 goto out;
671
672 pref_zc = NULL;
673 pref_zq = NULL;
674 spin_lock(&zcrypt_list_lock);
675 for_each_zcrypt_card(zc) {
676 /* Check for usable accelerator or CCA card */
677 if (!zc->online || !zc->card->config || zc->card->chkstop ||
678 !(zc->card->functions & 0x18000000))
679 continue;
680 /* Check for size limits */
681 if (zc->min_mod_size > mex->inputdatalength ||
682 zc->max_mod_size < mex->inputdatalength)
683 continue;
684 /* check if device node has admission for this card */
685 if (!zcrypt_check_card(perms, zc->card->id))
686 continue;
687 /* get weight index of the card device */
688 wgt = zc->speed_rating[func_code];
689 /* penalty if this msg was previously sent via this card */
690 cpen = (tr && tr->again_counter && tr->last_qid &&
691 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
692 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
693 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
694 continue;
695 for_each_zcrypt_queue(zq, zc) {
696 /* check if device is usable and eligible */
697 if (!zq->online || !zq->ops->rsa_modexpo ||
698 !zq->queue->config || zq->queue->chkstop)
699 continue;
700 /* check if device node has admission for this queue */
701 if (!zcrypt_check_queue(perms,
702 AP_QID_QUEUE(zq->queue->qid)))
703 continue;
704 /* penalty if the msg was previously sent at this qid */
705 qpen = (tr && tr->again_counter && tr->last_qid &&
706 tr->last_qid == zq->queue->qid) ?
707 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
708 if (!zcrypt_queue_compare(zq, pref_zq,
709 wgt + cpen + qpen, pref_wgt))
710 continue;
711 pref_zc = zc;
712 pref_zq = zq;
713 pref_wgt = wgt + cpen + qpen;
714 }
715 }
716 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
717 spin_unlock(&zcrypt_list_lock);
718
719 if (!pref_zq) {
720 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
721 __func__);
722 rc = -ENODEV;
723 goto out;
724 }
725
726 qid = pref_zq->queue->qid;
727 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
728
729 spin_lock(&zcrypt_list_lock);
730 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
731 spin_unlock(&zcrypt_list_lock);
732
733 out:
734 ap_release_message(&ap_msg);
735 if (tr) {
736 tr->last_rc = rc;
737 tr->last_qid = qid;
738 }
739 trace_s390_zcrypt_rep(mex, func_code, rc,
740 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
741 return rc;
742 }
743
zcrypt_rsa_crt(struct ap_perms * perms,struct zcrypt_track * tr,struct ica_rsa_modexpo_crt * crt)744 static long zcrypt_rsa_crt(struct ap_perms *perms,
745 struct zcrypt_track *tr,
746 struct ica_rsa_modexpo_crt *crt)
747 {
748 struct zcrypt_card *zc, *pref_zc;
749 struct zcrypt_queue *zq, *pref_zq;
750 struct ap_message ap_msg;
751 unsigned int wgt = 0, pref_wgt = 0;
752 unsigned int func_code;
753 int cpen, qpen, qid = 0, rc = -ENODEV;
754 struct module *mod;
755
756 trace_s390_zcrypt_req(crt, TP_ICARSACRT);
757
758 ap_init_message(&ap_msg);
759
760 if (crt->outputdatalength < crt->inputdatalength) {
761 func_code = 0;
762 rc = -EINVAL;
763 goto out;
764 }
765
766 /*
767 * As long as outputdatalength is big enough, we can set the
768 * outputdatalength equal to the inputdatalength, since that is the
769 * number of bytes we will copy in any case
770 */
771 crt->outputdatalength = crt->inputdatalength;
772
773 rc = get_rsa_crt_fc(crt, &func_code);
774 if (rc)
775 goto out;
776
777 pref_zc = NULL;
778 pref_zq = NULL;
779 spin_lock(&zcrypt_list_lock);
780 for_each_zcrypt_card(zc) {
781 /* Check for usable accelerator or CCA card */
782 if (!zc->online || !zc->card->config || zc->card->chkstop ||
783 !(zc->card->functions & 0x18000000))
784 continue;
785 /* Check for size limits */
786 if (zc->min_mod_size > crt->inputdatalength ||
787 zc->max_mod_size < crt->inputdatalength)
788 continue;
789 /* check if device node has admission for this card */
790 if (!zcrypt_check_card(perms, zc->card->id))
791 continue;
792 /* get weight index of the card device */
793 wgt = zc->speed_rating[func_code];
794 /* penalty if this msg was previously sent via this card */
795 cpen = (tr && tr->again_counter && tr->last_qid &&
796 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
797 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
798 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
799 continue;
800 for_each_zcrypt_queue(zq, zc) {
801 /* check if device is usable and eligible */
802 if (!zq->online || !zq->ops->rsa_modexpo_crt ||
803 !zq->queue->config || zq->queue->chkstop)
804 continue;
805 /* check if device node has admission for this queue */
806 if (!zcrypt_check_queue(perms,
807 AP_QID_QUEUE(zq->queue->qid)))
808 continue;
809 /* penalty if the msg was previously sent at this qid */
810 qpen = (tr && tr->again_counter && tr->last_qid &&
811 tr->last_qid == zq->queue->qid) ?
812 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
813 if (!zcrypt_queue_compare(zq, pref_zq,
814 wgt + cpen + qpen, pref_wgt))
815 continue;
816 pref_zc = zc;
817 pref_zq = zq;
818 pref_wgt = wgt + cpen + qpen;
819 }
820 }
821 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
822 spin_unlock(&zcrypt_list_lock);
823
824 if (!pref_zq) {
825 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
826 __func__);
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
_zcrypt_send_cprb(bool userspace,struct ap_perms * perms,struct zcrypt_track * tr,struct ica_xcRB * xcrb)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 rc = prep_cca_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
868 if (rc)
869 goto out;
870
871 tdom = *domain;
872 if (perms != &ap_perms && tdom < AP_DOMAINS) {
873 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
874 if (!test_bit_inv(tdom, perms->adm)) {
875 rc = -ENODEV;
876 goto out;
877 }
878 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
879 rc = -EOPNOTSUPP;
880 goto out;
881 }
882 }
883 /*
884 * If a valid target domain is set and this domain is NOT a usage
885 * domain but a control only domain, autoselect target domain.
886 */
887 if (tdom < AP_DOMAINS &&
888 !ap_test_config_usage_domain(tdom) &&
889 ap_test_config_ctrl_domain(tdom))
890 tdom = AUTOSEL_DOM;
891
892 pref_zc = NULL;
893 pref_zq = NULL;
894 spin_lock(&zcrypt_list_lock);
895 for_each_zcrypt_card(zc) {
896 /* Check for usable CCA card */
897 if (!zc->online || !zc->card->config || zc->card->chkstop ||
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 request size exceeds card max msg size */
905 if (ap_msg.len > zc->card->maxmsgsize)
906 continue;
907 /* check if device node has admission for this card */
908 if (!zcrypt_check_card(perms, zc->card->id))
909 continue;
910 /* get weight index of the card device */
911 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
912 /* penalty if this msg was previously sent via this card */
913 cpen = (tr && tr->again_counter && tr->last_qid &&
914 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
915 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
916 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
917 continue;
918 for_each_zcrypt_queue(zq, zc) {
919 /* check for device usable and eligible */
920 if (!zq->online || !zq->ops->send_cprb ||
921 !zq->queue->config || zq->queue->chkstop ||
922 (tdom != AUTOSEL_DOM &&
923 tdom != AP_QID_QUEUE(zq->queue->qid)))
924 continue;
925 /* check if device node has admission for this queue */
926 if (!zcrypt_check_queue(perms,
927 AP_QID_QUEUE(zq->queue->qid)))
928 continue;
929 /* penalty if the msg was previously sent at this qid */
930 qpen = (tr && tr->again_counter && tr->last_qid &&
931 tr->last_qid == zq->queue->qid) ?
932 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
933 if (!zcrypt_queue_compare(zq, pref_zq,
934 wgt + cpen + qpen, pref_wgt))
935 continue;
936 pref_zc = zc;
937 pref_zq = zq;
938 pref_wgt = wgt + cpen + qpen;
939 }
940 }
941 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
942 spin_unlock(&zcrypt_list_lock);
943
944 if (!pref_zq) {
945 ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n",
946 __func__, xcrb->user_defined, *domain);
947 rc = -ENODEV;
948 goto out;
949 }
950
951 /* in case of auto select, provide the correct domain */
952 qid = pref_zq->queue->qid;
953 if (*domain == AUTOSEL_DOM)
954 *domain = AP_QID_QUEUE(qid);
955
956 rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcrb, &ap_msg);
957
958 spin_lock(&zcrypt_list_lock);
959 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
960 spin_unlock(&zcrypt_list_lock);
961
962 out:
963 ap_release_message(&ap_msg);
964 if (tr) {
965 tr->last_rc = rc;
966 tr->last_qid = qid;
967 }
968 trace_s390_zcrypt_rep(xcrb, func_code, rc,
969 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
970 return rc;
971 }
972
zcrypt_send_cprb(struct ica_xcRB * xcrb)973 long zcrypt_send_cprb(struct ica_xcRB *xcrb)
974 {
975 return _zcrypt_send_cprb(false, &ap_perms, NULL, xcrb);
976 }
977 EXPORT_SYMBOL(zcrypt_send_cprb);
978
is_desired_ep11_card(unsigned int dev_id,unsigned short target_num,struct ep11_target_dev * targets)979 static bool is_desired_ep11_card(unsigned int dev_id,
980 unsigned short target_num,
981 struct ep11_target_dev *targets)
982 {
983 while (target_num-- > 0) {
984 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
985 return true;
986 targets++;
987 }
988 return false;
989 }
990
is_desired_ep11_queue(unsigned int dev_qid,unsigned short target_num,struct ep11_target_dev * targets)991 static bool is_desired_ep11_queue(unsigned int dev_qid,
992 unsigned short target_num,
993 struct ep11_target_dev *targets)
994 {
995 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
996
997 while (target_num-- > 0) {
998 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
999 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
1000 return true;
1001 targets++;
1002 }
1003 return false;
1004 }
1005
_zcrypt_send_ep11_cprb(bool userspace,struct ap_perms * perms,struct zcrypt_track * tr,struct ep11_urb * xcrb)1006 static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
1007 struct zcrypt_track *tr,
1008 struct ep11_urb *xcrb)
1009 {
1010 struct zcrypt_card *zc, *pref_zc;
1011 struct zcrypt_queue *zq, *pref_zq;
1012 struct ep11_target_dev *targets;
1013 unsigned short target_num;
1014 unsigned int wgt = 0, pref_wgt = 0;
1015 unsigned int func_code, domain;
1016 struct ap_message ap_msg;
1017 int cpen, qpen, qid = 0, rc = -ENODEV;
1018 struct module *mod;
1019
1020 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
1021
1022 ap_init_message(&ap_msg);
1023
1024 target_num = (unsigned short)xcrb->targets_num;
1025
1026 /* empty list indicates autoselect (all available targets) */
1027 targets = NULL;
1028 if (target_num != 0) {
1029 struct ep11_target_dev __user *uptr;
1030
1031 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
1032 if (!targets) {
1033 func_code = 0;
1034 rc = -ENOMEM;
1035 goto out;
1036 }
1037
1038 uptr = (struct ep11_target_dev __force __user *)xcrb->targets;
1039 if (z_copy_from_user(userspace, targets, uptr,
1040 target_num * sizeof(*targets))) {
1041 func_code = 0;
1042 rc = -EFAULT;
1043 goto out_free;
1044 }
1045 }
1046
1047 rc = prep_ep11_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
1048 if (rc)
1049 goto out_free;
1050
1051 if (perms != &ap_perms && domain < AUTOSEL_DOM) {
1052 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
1053 if (!test_bit_inv(domain, perms->adm)) {
1054 rc = -ENODEV;
1055 goto out_free;
1056 }
1057 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
1058 rc = -EOPNOTSUPP;
1059 goto out_free;
1060 }
1061 }
1062
1063 pref_zc = NULL;
1064 pref_zq = NULL;
1065 spin_lock(&zcrypt_list_lock);
1066 for_each_zcrypt_card(zc) {
1067 /* Check for usable EP11 card */
1068 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1069 !(zc->card->functions & 0x04000000))
1070 continue;
1071 /* Check for user selected EP11 card */
1072 if (targets &&
1073 !is_desired_ep11_card(zc->card->id, target_num, targets))
1074 continue;
1075 /* check if request size exceeds card max msg size */
1076 if (ap_msg.len > zc->card->maxmsgsize)
1077 continue;
1078 /* check if device node has admission for this card */
1079 if (!zcrypt_check_card(perms, zc->card->id))
1080 continue;
1081 /* get weight index of the card device */
1082 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1083 /* penalty if this msg was previously sent via this card */
1084 cpen = (tr && tr->again_counter && tr->last_qid &&
1085 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
1086 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
1087 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
1088 continue;
1089 for_each_zcrypt_queue(zq, zc) {
1090 /* check if device is usable and eligible */
1091 if (!zq->online || !zq->ops->send_ep11_cprb ||
1092 !zq->queue->config || zq->queue->chkstop ||
1093 (targets &&
1094 !is_desired_ep11_queue(zq->queue->qid,
1095 target_num, targets)))
1096 continue;
1097 /* check if device node has admission for this queue */
1098 if (!zcrypt_check_queue(perms,
1099 AP_QID_QUEUE(zq->queue->qid)))
1100 continue;
1101 /* penalty if the msg was previously sent at this qid */
1102 qpen = (tr && tr->again_counter && tr->last_qid &&
1103 tr->last_qid == zq->queue->qid) ?
1104 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
1105 if (!zcrypt_queue_compare(zq, pref_zq,
1106 wgt + cpen + qpen, pref_wgt))
1107 continue;
1108 pref_zc = zc;
1109 pref_zq = zq;
1110 pref_wgt = wgt + cpen + qpen;
1111 }
1112 }
1113 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1114 spin_unlock(&zcrypt_list_lock);
1115
1116 if (!pref_zq) {
1117 if (targets && target_num == 1) {
1118 ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n",
1119 __func__, (int)targets->ap_id,
1120 (int)targets->dom_id);
1121 } else if (targets) {
1122 ZCRYPT_DBF_DBG("%s no match for %d target addrs => ENODEV\n",
1123 __func__, (int)target_num);
1124 } else {
1125 ZCRYPT_DBF_DBG("%s no match for address ff.ffff => ENODEV\n",
1126 __func__);
1127 }
1128 rc = -ENODEV;
1129 goto out_free;
1130 }
1131
1132 qid = pref_zq->queue->qid;
1133 rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
1134
1135 spin_lock(&zcrypt_list_lock);
1136 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1137 spin_unlock(&zcrypt_list_lock);
1138
1139 out_free:
1140 kfree(targets);
1141 out:
1142 ap_release_message(&ap_msg);
1143 if (tr) {
1144 tr->last_rc = rc;
1145 tr->last_qid = qid;
1146 }
1147 trace_s390_zcrypt_rep(xcrb, func_code, rc,
1148 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1149 return rc;
1150 }
1151
zcrypt_send_ep11_cprb(struct ep11_urb * xcrb)1152 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1153 {
1154 return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb);
1155 }
1156 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1157
zcrypt_rng(char * buffer)1158 static long zcrypt_rng(char *buffer)
1159 {
1160 struct zcrypt_card *zc, *pref_zc;
1161 struct zcrypt_queue *zq, *pref_zq;
1162 unsigned int wgt = 0, pref_wgt = 0;
1163 unsigned int func_code;
1164 struct ap_message ap_msg;
1165 unsigned int domain;
1166 int qid = 0, rc = -ENODEV;
1167 struct module *mod;
1168
1169 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1170
1171 ap_init_message(&ap_msg);
1172 rc = prep_rng_ap_msg(&ap_msg, &func_code, &domain);
1173 if (rc)
1174 goto out;
1175
1176 pref_zc = NULL;
1177 pref_zq = NULL;
1178 spin_lock(&zcrypt_list_lock);
1179 for_each_zcrypt_card(zc) {
1180 /* Check for usable CCA card */
1181 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1182 !(zc->card->functions & 0x10000000))
1183 continue;
1184 /* get weight index of the card device */
1185 wgt = zc->speed_rating[func_code];
1186 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
1187 continue;
1188 for_each_zcrypt_queue(zq, zc) {
1189 /* check if device is usable and eligible */
1190 if (!zq->online || !zq->ops->rng ||
1191 !zq->queue->config || zq->queue->chkstop)
1192 continue;
1193 if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
1194 continue;
1195 pref_zc = zc;
1196 pref_zq = zq;
1197 pref_wgt = wgt;
1198 }
1199 }
1200 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1201 spin_unlock(&zcrypt_list_lock);
1202
1203 if (!pref_zq) {
1204 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
1205 __func__);
1206 rc = -ENODEV;
1207 goto out;
1208 }
1209
1210 qid = pref_zq->queue->qid;
1211 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1212
1213 spin_lock(&zcrypt_list_lock);
1214 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1215 spin_unlock(&zcrypt_list_lock);
1216
1217 out:
1218 ap_release_message(&ap_msg);
1219 trace_s390_zcrypt_rep(buffer, func_code, rc,
1220 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1221 return rc;
1222 }
1223
zcrypt_device_status_mask(struct zcrypt_device_status * devstatus)1224 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1225 {
1226 struct zcrypt_card *zc;
1227 struct zcrypt_queue *zq;
1228 struct zcrypt_device_status *stat;
1229 int card, queue;
1230
1231 memset(devstatus, 0, MAX_ZDEV_ENTRIES
1232 * sizeof(struct zcrypt_device_status));
1233
1234 spin_lock(&zcrypt_list_lock);
1235 for_each_zcrypt_card(zc) {
1236 for_each_zcrypt_queue(zq, zc) {
1237 card = AP_QID_CARD(zq->queue->qid);
1238 if (card >= MAX_ZDEV_CARDIDS)
1239 continue;
1240 queue = AP_QID_QUEUE(zq->queue->qid);
1241 stat = &devstatus[card * AP_DOMAINS + queue];
1242 stat->hwtype = zc->card->ap_dev.device_type;
1243 stat->functions = zc->card->functions >> 26;
1244 stat->qid = zq->queue->qid;
1245 stat->online = zq->online ? 0x01 : 0x00;
1246 }
1247 }
1248 spin_unlock(&zcrypt_list_lock);
1249 }
1250
zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext * devstatus)1251 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1252 {
1253 struct zcrypt_card *zc;
1254 struct zcrypt_queue *zq;
1255 struct zcrypt_device_status_ext *stat;
1256 int card, queue;
1257
1258 memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1259 * sizeof(struct zcrypt_device_status_ext));
1260
1261 spin_lock(&zcrypt_list_lock);
1262 for_each_zcrypt_card(zc) {
1263 for_each_zcrypt_queue(zq, zc) {
1264 card = AP_QID_CARD(zq->queue->qid);
1265 queue = AP_QID_QUEUE(zq->queue->qid);
1266 stat = &devstatus[card * AP_DOMAINS + queue];
1267 stat->hwtype = zc->card->ap_dev.device_type;
1268 stat->functions = zc->card->functions >> 26;
1269 stat->qid = zq->queue->qid;
1270 stat->online = zq->online ? 0x01 : 0x00;
1271 }
1272 }
1273 spin_unlock(&zcrypt_list_lock);
1274 }
1275 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1276
zcrypt_device_status_ext(int card,int queue,struct zcrypt_device_status_ext * devstat)1277 int zcrypt_device_status_ext(int card, int queue,
1278 struct zcrypt_device_status_ext *devstat)
1279 {
1280 struct zcrypt_card *zc;
1281 struct zcrypt_queue *zq;
1282
1283 memset(devstat, 0, sizeof(*devstat));
1284
1285 spin_lock(&zcrypt_list_lock);
1286 for_each_zcrypt_card(zc) {
1287 for_each_zcrypt_queue(zq, zc) {
1288 if (card == AP_QID_CARD(zq->queue->qid) &&
1289 queue == AP_QID_QUEUE(zq->queue->qid)) {
1290 devstat->hwtype = zc->card->ap_dev.device_type;
1291 devstat->functions = zc->card->functions >> 26;
1292 devstat->qid = zq->queue->qid;
1293 devstat->online = zq->online ? 0x01 : 0x00;
1294 spin_unlock(&zcrypt_list_lock);
1295 return 0;
1296 }
1297 }
1298 }
1299 spin_unlock(&zcrypt_list_lock);
1300
1301 return -ENODEV;
1302 }
1303 EXPORT_SYMBOL(zcrypt_device_status_ext);
1304
zcrypt_status_mask(char status[],size_t max_adapters)1305 static void zcrypt_status_mask(char status[], size_t max_adapters)
1306 {
1307 struct zcrypt_card *zc;
1308 struct zcrypt_queue *zq;
1309 int card;
1310
1311 memset(status, 0, max_adapters);
1312 spin_lock(&zcrypt_list_lock);
1313 for_each_zcrypt_card(zc) {
1314 for_each_zcrypt_queue(zq, zc) {
1315 card = AP_QID_CARD(zq->queue->qid);
1316 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1317 card >= max_adapters)
1318 continue;
1319 status[card] = zc->online ? zc->user_space_type : 0x0d;
1320 }
1321 }
1322 spin_unlock(&zcrypt_list_lock);
1323 }
1324
zcrypt_qdepth_mask(char qdepth[],size_t max_adapters)1325 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1326 {
1327 struct zcrypt_card *zc;
1328 struct zcrypt_queue *zq;
1329 int card;
1330
1331 memset(qdepth, 0, max_adapters);
1332 spin_lock(&zcrypt_list_lock);
1333 local_bh_disable();
1334 for_each_zcrypt_card(zc) {
1335 for_each_zcrypt_queue(zq, zc) {
1336 card = AP_QID_CARD(zq->queue->qid);
1337 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1338 card >= max_adapters)
1339 continue;
1340 spin_lock(&zq->queue->lock);
1341 qdepth[card] =
1342 zq->queue->pendingq_count +
1343 zq->queue->requestq_count;
1344 spin_unlock(&zq->queue->lock);
1345 }
1346 }
1347 local_bh_enable();
1348 spin_unlock(&zcrypt_list_lock);
1349 }
1350
zcrypt_perdev_reqcnt(u32 reqcnt[],size_t max_adapters)1351 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1352 {
1353 struct zcrypt_card *zc;
1354 struct zcrypt_queue *zq;
1355 int card;
1356 u64 cnt;
1357
1358 memset(reqcnt, 0, sizeof(int) * max_adapters);
1359 spin_lock(&zcrypt_list_lock);
1360 local_bh_disable();
1361 for_each_zcrypt_card(zc) {
1362 for_each_zcrypt_queue(zq, zc) {
1363 card = AP_QID_CARD(zq->queue->qid);
1364 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1365 card >= max_adapters)
1366 continue;
1367 spin_lock(&zq->queue->lock);
1368 cnt = zq->queue->total_request_count;
1369 spin_unlock(&zq->queue->lock);
1370 reqcnt[card] = (cnt < UINT_MAX) ? (u32)cnt : UINT_MAX;
1371 }
1372 }
1373 local_bh_enable();
1374 spin_unlock(&zcrypt_list_lock);
1375 }
1376
zcrypt_pendingq_count(void)1377 static int zcrypt_pendingq_count(void)
1378 {
1379 struct zcrypt_card *zc;
1380 struct zcrypt_queue *zq;
1381 int pendingq_count;
1382
1383 pendingq_count = 0;
1384 spin_lock(&zcrypt_list_lock);
1385 local_bh_disable();
1386 for_each_zcrypt_card(zc) {
1387 for_each_zcrypt_queue(zq, zc) {
1388 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1389 continue;
1390 spin_lock(&zq->queue->lock);
1391 pendingq_count += zq->queue->pendingq_count;
1392 spin_unlock(&zq->queue->lock);
1393 }
1394 }
1395 local_bh_enable();
1396 spin_unlock(&zcrypt_list_lock);
1397 return pendingq_count;
1398 }
1399
zcrypt_requestq_count(void)1400 static int zcrypt_requestq_count(void)
1401 {
1402 struct zcrypt_card *zc;
1403 struct zcrypt_queue *zq;
1404 int requestq_count;
1405
1406 requestq_count = 0;
1407 spin_lock(&zcrypt_list_lock);
1408 local_bh_disable();
1409 for_each_zcrypt_card(zc) {
1410 for_each_zcrypt_queue(zq, zc) {
1411 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1412 continue;
1413 spin_lock(&zq->queue->lock);
1414 requestq_count += zq->queue->requestq_count;
1415 spin_unlock(&zq->queue->lock);
1416 }
1417 }
1418 local_bh_enable();
1419 spin_unlock(&zcrypt_list_lock);
1420 return requestq_count;
1421 }
1422
icarsamodexpo_ioctl(struct ap_perms * perms,unsigned long arg)1423 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1424 {
1425 int rc;
1426 struct zcrypt_track tr;
1427 struct ica_rsa_modexpo mex;
1428 struct ica_rsa_modexpo __user *umex = (void __user *)arg;
1429
1430 memset(&tr, 0, sizeof(tr));
1431 if (copy_from_user(&mex, umex, sizeof(mex)))
1432 return -EFAULT;
1433
1434 do {
1435 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1436 if (rc == -EAGAIN)
1437 tr.again_counter++;
1438 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1439 /* on failure: retry once again after a requested rescan */
1440 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1441 do {
1442 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1443 if (rc == -EAGAIN)
1444 tr.again_counter++;
1445 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1446 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1447 rc = -EIO;
1448 if (rc) {
1449 ZCRYPT_DBF_DBG("ioctl ICARSAMODEXPO rc=%d\n", rc);
1450 return rc;
1451 }
1452 return put_user(mex.outputdatalength, &umex->outputdatalength);
1453 }
1454
icarsacrt_ioctl(struct ap_perms * perms,unsigned long arg)1455 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1456 {
1457 int rc;
1458 struct zcrypt_track tr;
1459 struct ica_rsa_modexpo_crt crt;
1460 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *)arg;
1461
1462 memset(&tr, 0, sizeof(tr));
1463 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1464 return -EFAULT;
1465
1466 do {
1467 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1468 if (rc == -EAGAIN)
1469 tr.again_counter++;
1470 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1471 /* on failure: retry once again after a requested rescan */
1472 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1473 do {
1474 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1475 if (rc == -EAGAIN)
1476 tr.again_counter++;
1477 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1478 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1479 rc = -EIO;
1480 if (rc) {
1481 ZCRYPT_DBF_DBG("ioctl ICARSACRT rc=%d\n", rc);
1482 return rc;
1483 }
1484 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1485 }
1486
zsecsendcprb_ioctl(struct ap_perms * perms,unsigned long arg)1487 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1488 {
1489 int rc;
1490 struct ica_xcRB xcrb;
1491 struct zcrypt_track tr;
1492 struct ica_xcRB __user *uxcrb = (void __user *)arg;
1493
1494 memset(&tr, 0, sizeof(tr));
1495 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1496 return -EFAULT;
1497
1498 do {
1499 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1500 if (rc == -EAGAIN)
1501 tr.again_counter++;
1502 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1503 /* on failure: retry once again after a requested rescan */
1504 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1505 do {
1506 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1507 if (rc == -EAGAIN)
1508 tr.again_counter++;
1509 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1510 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1511 rc = -EIO;
1512 if (rc)
1513 ZCRYPT_DBF_DBG("ioctl ZSENDCPRB rc=%d status=0x%x\n",
1514 rc, xcrb.status);
1515 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1516 return -EFAULT;
1517 return rc;
1518 }
1519
zsendep11cprb_ioctl(struct ap_perms * perms,unsigned long arg)1520 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1521 {
1522 int rc;
1523 struct ep11_urb xcrb;
1524 struct zcrypt_track tr;
1525 struct ep11_urb __user *uxcrb = (void __user *)arg;
1526
1527 memset(&tr, 0, sizeof(tr));
1528 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1529 return -EFAULT;
1530
1531 do {
1532 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1533 if (rc == -EAGAIN)
1534 tr.again_counter++;
1535 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1536 /* on failure: retry once again after a requested rescan */
1537 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1538 do {
1539 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1540 if (rc == -EAGAIN)
1541 tr.again_counter++;
1542 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1543 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1544 rc = -EIO;
1545 if (rc)
1546 ZCRYPT_DBF_DBG("ioctl ZSENDEP11CPRB rc=%d\n", rc);
1547 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1548 return -EFAULT;
1549 return rc;
1550 }
1551
zcrypt_unlocked_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1552 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1553 unsigned long arg)
1554 {
1555 int rc;
1556 struct ap_perms *perms =
1557 (struct ap_perms *)filp->private_data;
1558
1559 rc = zcrypt_check_ioctl(perms, cmd);
1560 if (rc)
1561 return rc;
1562
1563 switch (cmd) {
1564 case ICARSAMODEXPO:
1565 return icarsamodexpo_ioctl(perms, arg);
1566 case ICARSACRT:
1567 return icarsacrt_ioctl(perms, arg);
1568 case ZSECSENDCPRB:
1569 return zsecsendcprb_ioctl(perms, arg);
1570 case ZSENDEP11CPRB:
1571 return zsendep11cprb_ioctl(perms, arg);
1572 case ZCRYPT_DEVICE_STATUS: {
1573 struct zcrypt_device_status_ext *device_status;
1574 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1575 * sizeof(struct zcrypt_device_status_ext);
1576
1577 device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT,
1578 sizeof(struct zcrypt_device_status_ext),
1579 GFP_KERNEL);
1580 if (!device_status)
1581 return -ENOMEM;
1582 zcrypt_device_status_mask_ext(device_status);
1583 if (copy_to_user((char __user *)arg, device_status,
1584 total_size))
1585 rc = -EFAULT;
1586 kvfree(device_status);
1587 return rc;
1588 }
1589 case ZCRYPT_STATUS_MASK: {
1590 char status[AP_DEVICES];
1591
1592 zcrypt_status_mask(status, AP_DEVICES);
1593 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1594 return -EFAULT;
1595 return 0;
1596 }
1597 case ZCRYPT_QDEPTH_MASK: {
1598 char qdepth[AP_DEVICES];
1599
1600 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1601 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1602 return -EFAULT;
1603 return 0;
1604 }
1605 case ZCRYPT_PERDEV_REQCNT: {
1606 u32 *reqcnt;
1607
1608 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1609 if (!reqcnt)
1610 return -ENOMEM;
1611 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1612 if (copy_to_user((int __user *)arg, reqcnt,
1613 sizeof(u32) * AP_DEVICES))
1614 rc = -EFAULT;
1615 kfree(reqcnt);
1616 return rc;
1617 }
1618 case Z90STAT_REQUESTQ_COUNT:
1619 return put_user(zcrypt_requestq_count(), (int __user *)arg);
1620 case Z90STAT_PENDINGQ_COUNT:
1621 return put_user(zcrypt_pendingq_count(), (int __user *)arg);
1622 case Z90STAT_TOTALOPEN_COUNT:
1623 return put_user(atomic_read(&zcrypt_open_count),
1624 (int __user *)arg);
1625 case Z90STAT_DOMAIN_INDEX:
1626 return put_user(ap_domain_index, (int __user *)arg);
1627 /*
1628 * Deprecated ioctls
1629 */
1630 case ZDEVICESTATUS: {
1631 /* the old ioctl supports only 64 adapters */
1632 struct zcrypt_device_status *device_status;
1633 size_t total_size = MAX_ZDEV_ENTRIES
1634 * sizeof(struct zcrypt_device_status);
1635
1636 device_status = kzalloc(total_size, GFP_KERNEL);
1637 if (!device_status)
1638 return -ENOMEM;
1639 zcrypt_device_status_mask(device_status);
1640 if (copy_to_user((char __user *)arg, device_status,
1641 total_size))
1642 rc = -EFAULT;
1643 kfree(device_status);
1644 return rc;
1645 }
1646 case Z90STAT_STATUS_MASK: {
1647 /* the old ioctl supports only 64 adapters */
1648 char status[MAX_ZDEV_CARDIDS];
1649
1650 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1651 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1652 return -EFAULT;
1653 return 0;
1654 }
1655 case Z90STAT_QDEPTH_MASK: {
1656 /* the old ioctl supports only 64 adapters */
1657 char qdepth[MAX_ZDEV_CARDIDS];
1658
1659 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1660 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1661 return -EFAULT;
1662 return 0;
1663 }
1664 case Z90STAT_PERDEV_REQCNT: {
1665 /* the old ioctl supports only 64 adapters */
1666 u32 reqcnt[MAX_ZDEV_CARDIDS];
1667
1668 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1669 if (copy_to_user((int __user *)arg, reqcnt, sizeof(reqcnt)))
1670 return -EFAULT;
1671 return 0;
1672 }
1673 /* unknown ioctl number */
1674 default:
1675 ZCRYPT_DBF_DBG("unknown ioctl 0x%08x\n", cmd);
1676 return -ENOIOCTLCMD;
1677 }
1678 }
1679
1680 #ifdef CONFIG_COMPAT
1681 /*
1682 * ioctl32 conversion routines
1683 */
1684 struct compat_ica_rsa_modexpo {
1685 compat_uptr_t inputdata;
1686 unsigned int inputdatalength;
1687 compat_uptr_t outputdata;
1688 unsigned int outputdatalength;
1689 compat_uptr_t b_key;
1690 compat_uptr_t n_modulus;
1691 };
1692
trans_modexpo32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1693 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1694 unsigned int cmd, unsigned long arg)
1695 {
1696 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1697 struct compat_ica_rsa_modexpo mex32;
1698 struct ica_rsa_modexpo mex64;
1699 struct zcrypt_track tr;
1700 long rc;
1701
1702 memset(&tr, 0, sizeof(tr));
1703 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1704 return -EFAULT;
1705 mex64.inputdata = compat_ptr(mex32.inputdata);
1706 mex64.inputdatalength = mex32.inputdatalength;
1707 mex64.outputdata = compat_ptr(mex32.outputdata);
1708 mex64.outputdatalength = mex32.outputdatalength;
1709 mex64.b_key = compat_ptr(mex32.b_key);
1710 mex64.n_modulus = compat_ptr(mex32.n_modulus);
1711 do {
1712 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1713 if (rc == -EAGAIN)
1714 tr.again_counter++;
1715 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1716 /* on failure: retry once again after a requested rescan */
1717 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1718 do {
1719 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1720 if (rc == -EAGAIN)
1721 tr.again_counter++;
1722 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1723 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1724 rc = -EIO;
1725 if (rc)
1726 return rc;
1727 return put_user(mex64.outputdatalength,
1728 &umex32->outputdatalength);
1729 }
1730
1731 struct compat_ica_rsa_modexpo_crt {
1732 compat_uptr_t inputdata;
1733 unsigned int inputdatalength;
1734 compat_uptr_t outputdata;
1735 unsigned int outputdatalength;
1736 compat_uptr_t bp_key;
1737 compat_uptr_t bq_key;
1738 compat_uptr_t np_prime;
1739 compat_uptr_t nq_prime;
1740 compat_uptr_t u_mult_inv;
1741 };
1742
trans_modexpo_crt32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1743 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1744 unsigned int cmd, unsigned long arg)
1745 {
1746 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1747 struct compat_ica_rsa_modexpo_crt crt32;
1748 struct ica_rsa_modexpo_crt crt64;
1749 struct zcrypt_track tr;
1750 long rc;
1751
1752 memset(&tr, 0, sizeof(tr));
1753 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1754 return -EFAULT;
1755 crt64.inputdata = compat_ptr(crt32.inputdata);
1756 crt64.inputdatalength = crt32.inputdatalength;
1757 crt64.outputdata = compat_ptr(crt32.outputdata);
1758 crt64.outputdatalength = crt32.outputdatalength;
1759 crt64.bp_key = compat_ptr(crt32.bp_key);
1760 crt64.bq_key = compat_ptr(crt32.bq_key);
1761 crt64.np_prime = compat_ptr(crt32.np_prime);
1762 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1763 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1764 do {
1765 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1766 if (rc == -EAGAIN)
1767 tr.again_counter++;
1768 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1769 /* on failure: retry once again after a requested rescan */
1770 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1771 do {
1772 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1773 if (rc == -EAGAIN)
1774 tr.again_counter++;
1775 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1776 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1777 rc = -EIO;
1778 if (rc)
1779 return rc;
1780 return put_user(crt64.outputdatalength,
1781 &ucrt32->outputdatalength);
1782 }
1783
1784 struct compat_ica_xcrb {
1785 unsigned short agent_ID;
1786 unsigned int user_defined;
1787 unsigned short request_ID;
1788 unsigned int request_control_blk_length;
1789 unsigned char padding1[16 - sizeof(compat_uptr_t)];
1790 compat_uptr_t request_control_blk_addr;
1791 unsigned int request_data_length;
1792 char padding2[16 - sizeof(compat_uptr_t)];
1793 compat_uptr_t request_data_address;
1794 unsigned int reply_control_blk_length;
1795 char padding3[16 - sizeof(compat_uptr_t)];
1796 compat_uptr_t reply_control_blk_addr;
1797 unsigned int reply_data_length;
1798 char padding4[16 - sizeof(compat_uptr_t)];
1799 compat_uptr_t reply_data_addr;
1800 unsigned short priority_window;
1801 unsigned int status;
1802 } __packed;
1803
trans_xcrb32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1804 static long trans_xcrb32(struct ap_perms *perms, struct file *filp,
1805 unsigned int cmd, unsigned long arg)
1806 {
1807 struct compat_ica_xcrb __user *uxcrb32 = compat_ptr(arg);
1808 struct compat_ica_xcrb xcrb32;
1809 struct zcrypt_track tr;
1810 struct ica_xcRB xcrb64;
1811 long rc;
1812
1813 memset(&tr, 0, sizeof(tr));
1814 if (copy_from_user(&xcrb32, uxcrb32, sizeof(xcrb32)))
1815 return -EFAULT;
1816 xcrb64.agent_ID = xcrb32.agent_ID;
1817 xcrb64.user_defined = xcrb32.user_defined;
1818 xcrb64.request_ID = xcrb32.request_ID;
1819 xcrb64.request_control_blk_length =
1820 xcrb32.request_control_blk_length;
1821 xcrb64.request_control_blk_addr =
1822 compat_ptr(xcrb32.request_control_blk_addr);
1823 xcrb64.request_data_length =
1824 xcrb32.request_data_length;
1825 xcrb64.request_data_address =
1826 compat_ptr(xcrb32.request_data_address);
1827 xcrb64.reply_control_blk_length =
1828 xcrb32.reply_control_blk_length;
1829 xcrb64.reply_control_blk_addr =
1830 compat_ptr(xcrb32.reply_control_blk_addr);
1831 xcrb64.reply_data_length = xcrb32.reply_data_length;
1832 xcrb64.reply_data_addr =
1833 compat_ptr(xcrb32.reply_data_addr);
1834 xcrb64.priority_window = xcrb32.priority_window;
1835 xcrb64.status = xcrb32.status;
1836 do {
1837 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1838 if (rc == -EAGAIN)
1839 tr.again_counter++;
1840 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1841 /* on failure: retry once again after a requested rescan */
1842 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1843 do {
1844 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1845 if (rc == -EAGAIN)
1846 tr.again_counter++;
1847 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1848 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1849 rc = -EIO;
1850 xcrb32.reply_control_blk_length = xcrb64.reply_control_blk_length;
1851 xcrb32.reply_data_length = xcrb64.reply_data_length;
1852 xcrb32.status = xcrb64.status;
1853 if (copy_to_user(uxcrb32, &xcrb32, sizeof(xcrb32)))
1854 return -EFAULT;
1855 return rc;
1856 }
1857
zcrypt_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1858 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1859 unsigned long arg)
1860 {
1861 int rc;
1862 struct ap_perms *perms =
1863 (struct ap_perms *)filp->private_data;
1864
1865 rc = zcrypt_check_ioctl(perms, cmd);
1866 if (rc)
1867 return rc;
1868
1869 if (cmd == ICARSAMODEXPO)
1870 return trans_modexpo32(perms, filp, cmd, arg);
1871 if (cmd == ICARSACRT)
1872 return trans_modexpo_crt32(perms, filp, cmd, arg);
1873 if (cmd == ZSECSENDCPRB)
1874 return trans_xcrb32(perms, filp, cmd, arg);
1875 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1876 }
1877 #endif
1878
1879 /*
1880 * Misc device file operations.
1881 */
1882 static const struct file_operations zcrypt_fops = {
1883 .owner = THIS_MODULE,
1884 .read = zcrypt_read,
1885 .write = zcrypt_write,
1886 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1887 #ifdef CONFIG_COMPAT
1888 .compat_ioctl = zcrypt_compat_ioctl,
1889 #endif
1890 .open = zcrypt_open,
1891 .release = zcrypt_release,
1892 .llseek = no_llseek,
1893 };
1894
1895 /*
1896 * Misc device.
1897 */
1898 static struct miscdevice zcrypt_misc_device = {
1899 .minor = MISC_DYNAMIC_MINOR,
1900 .name = "z90crypt",
1901 .fops = &zcrypt_fops,
1902 };
1903
1904 static int zcrypt_rng_device_count;
1905 static u32 *zcrypt_rng_buffer;
1906 static int zcrypt_rng_buffer_index;
1907 static DEFINE_MUTEX(zcrypt_rng_mutex);
1908
zcrypt_rng_data_read(struct hwrng * rng,u32 * data)1909 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1910 {
1911 int rc;
1912
1913 /*
1914 * We don't need locking here because the RNG API guarantees serialized
1915 * read method calls.
1916 */
1917 if (zcrypt_rng_buffer_index == 0) {
1918 rc = zcrypt_rng((char *)zcrypt_rng_buffer);
1919 /* on failure: retry once again after a requested rescan */
1920 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1921 rc = zcrypt_rng((char *)zcrypt_rng_buffer);
1922 if (rc < 0)
1923 return -EIO;
1924 zcrypt_rng_buffer_index = rc / sizeof(*data);
1925 }
1926 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1927 return sizeof(*data);
1928 }
1929
1930 static struct hwrng zcrypt_rng_dev = {
1931 .name = "zcrypt",
1932 .data_read = zcrypt_rng_data_read,
1933 .quality = 990,
1934 };
1935
zcrypt_rng_device_add(void)1936 int zcrypt_rng_device_add(void)
1937 {
1938 int rc = 0;
1939
1940 mutex_lock(&zcrypt_rng_mutex);
1941 if (zcrypt_rng_device_count == 0) {
1942 zcrypt_rng_buffer = (u32 *)get_zeroed_page(GFP_KERNEL);
1943 if (!zcrypt_rng_buffer) {
1944 rc = -ENOMEM;
1945 goto out;
1946 }
1947 zcrypt_rng_buffer_index = 0;
1948 rc = hwrng_register(&zcrypt_rng_dev);
1949 if (rc)
1950 goto out_free;
1951 zcrypt_rng_device_count = 1;
1952 } else {
1953 zcrypt_rng_device_count++;
1954 }
1955 mutex_unlock(&zcrypt_rng_mutex);
1956 return 0;
1957
1958 out_free:
1959 free_page((unsigned long)zcrypt_rng_buffer);
1960 out:
1961 mutex_unlock(&zcrypt_rng_mutex);
1962 return rc;
1963 }
1964
zcrypt_rng_device_remove(void)1965 void zcrypt_rng_device_remove(void)
1966 {
1967 mutex_lock(&zcrypt_rng_mutex);
1968 zcrypt_rng_device_count--;
1969 if (zcrypt_rng_device_count == 0) {
1970 hwrng_unregister(&zcrypt_rng_dev);
1971 free_page((unsigned long)zcrypt_rng_buffer);
1972 }
1973 mutex_unlock(&zcrypt_rng_mutex);
1974 }
1975
1976 /*
1977 * Wait until the zcrypt api is operational.
1978 * The AP bus scan and the binding of ap devices to device drivers is
1979 * an asynchronous job. This function waits until these initial jobs
1980 * are done and so the zcrypt api should be ready to serve crypto
1981 * requests - if there are resources available. The function uses an
1982 * internal timeout of 60s. The very first caller will either wait for
1983 * ap bus bindings complete or the timeout happens. This state will be
1984 * remembered for further callers which will only be blocked until a
1985 * decision is made (timeout or bindings complete).
1986 * On timeout -ETIME is returned, on success the return value is 0.
1987 */
zcrypt_wait_api_operational(void)1988 int zcrypt_wait_api_operational(void)
1989 {
1990 static DEFINE_MUTEX(zcrypt_wait_api_lock);
1991 static int zcrypt_wait_api_state;
1992 int rc;
1993
1994 rc = mutex_lock_interruptible(&zcrypt_wait_api_lock);
1995 if (rc)
1996 return rc;
1997
1998 switch (zcrypt_wait_api_state) {
1999 case 0:
2000 /* initial state, invoke wait for the ap bus complete */
2001 rc = ap_wait_init_apqn_bindings_complete(
2002 msecs_to_jiffies(60 * 1000));
2003 switch (rc) {
2004 case 0:
2005 /* ap bus bindings are complete */
2006 zcrypt_wait_api_state = 1;
2007 break;
2008 case -EINTR:
2009 /* interrupted, go back to caller */
2010 break;
2011 case -ETIME:
2012 /* timeout */
2013 ZCRYPT_DBF_WARN("%s ap_wait_init_apqn_bindings_complete()=ETIME\n",
2014 __func__);
2015 zcrypt_wait_api_state = -ETIME;
2016 break;
2017 default:
2018 /* other failure */
2019 ZCRYPT_DBF_DBG("%s ap_wait_init_apqn_bindings_complete()=%d\n",
2020 __func__, rc);
2021 break;
2022 }
2023 break;
2024 case 1:
2025 /* a previous caller already found ap bus bindings complete */
2026 rc = 0;
2027 break;
2028 default:
2029 /* a previous caller had timeout or other failure */
2030 rc = zcrypt_wait_api_state;
2031 break;
2032 }
2033
2034 mutex_unlock(&zcrypt_wait_api_lock);
2035
2036 return rc;
2037 }
2038 EXPORT_SYMBOL(zcrypt_wait_api_operational);
2039
zcrypt_debug_init(void)2040 int __init zcrypt_debug_init(void)
2041 {
2042 zcrypt_dbf_info = debug_register("zcrypt", 2, 1,
2043 DBF_MAX_SPRINTF_ARGS * sizeof(long));
2044 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
2045 debug_set_level(zcrypt_dbf_info, DBF_ERR);
2046
2047 return 0;
2048 }
2049
zcrypt_debug_exit(void)2050 void zcrypt_debug_exit(void)
2051 {
2052 debug_unregister(zcrypt_dbf_info);
2053 }
2054
zcdn_init(void)2055 static int __init zcdn_init(void)
2056 {
2057 int rc;
2058
2059 /* create a new class 'zcrypt' */
2060 zcrypt_class = class_create(ZCRYPT_NAME);
2061 if (IS_ERR(zcrypt_class)) {
2062 rc = PTR_ERR(zcrypt_class);
2063 goto out_class_create_failed;
2064 }
2065 zcrypt_class->dev_release = zcdn_device_release;
2066
2067 /* alloc device minor range */
2068 rc = alloc_chrdev_region(&zcrypt_devt,
2069 0, ZCRYPT_MAX_MINOR_NODES,
2070 ZCRYPT_NAME);
2071 if (rc)
2072 goto out_alloc_chrdev_failed;
2073
2074 cdev_init(&zcrypt_cdev, &zcrypt_fops);
2075 zcrypt_cdev.owner = THIS_MODULE;
2076 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2077 if (rc)
2078 goto out_cdev_add_failed;
2079
2080 /* need some class specific sysfs attributes */
2081 rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
2082 if (rc)
2083 goto out_class_create_file_1_failed;
2084 rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
2085 if (rc)
2086 goto out_class_create_file_2_failed;
2087
2088 return 0;
2089
2090 out_class_create_file_2_failed:
2091 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2092 out_class_create_file_1_failed:
2093 cdev_del(&zcrypt_cdev);
2094 out_cdev_add_failed:
2095 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2096 out_alloc_chrdev_failed:
2097 class_destroy(zcrypt_class);
2098 out_class_create_failed:
2099 return rc;
2100 }
2101
zcdn_exit(void)2102 static void zcdn_exit(void)
2103 {
2104 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2105 class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
2106 zcdn_destroy_all();
2107 cdev_del(&zcrypt_cdev);
2108 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2109 class_destroy(zcrypt_class);
2110 }
2111
2112 /*
2113 * zcrypt_api_init(): Module initialization.
2114 *
2115 * The module initialization code.
2116 */
zcrypt_api_init(void)2117 int __init zcrypt_api_init(void)
2118 {
2119 int rc;
2120
2121 rc = zcrypt_debug_init();
2122 if (rc)
2123 goto out;
2124
2125 rc = zcdn_init();
2126 if (rc)
2127 goto out;
2128
2129 /* Register the request sprayer. */
2130 rc = misc_register(&zcrypt_misc_device);
2131 if (rc < 0)
2132 goto out_misc_register_failed;
2133
2134 zcrypt_msgtype6_init();
2135 zcrypt_msgtype50_init();
2136
2137 return 0;
2138
2139 out_misc_register_failed:
2140 zcdn_exit();
2141 zcrypt_debug_exit();
2142 out:
2143 return rc;
2144 }
2145
2146 /*
2147 * zcrypt_api_exit(): Module termination.
2148 *
2149 * The module termination code.
2150 */
zcrypt_api_exit(void)2151 void __exit zcrypt_api_exit(void)
2152 {
2153 zcdn_exit();
2154 misc_deregister(&zcrypt_misc_device);
2155 zcrypt_msgtype6_exit();
2156 zcrypt_msgtype50_exit();
2157 zcrypt_ccamisc_exit();
2158 zcrypt_ep11misc_exit();
2159 zcrypt_debug_exit();
2160 }
2161
2162 module_init(zcrypt_api_init);
2163 module_exit(zcrypt_api_exit);
2164