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 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
115
116 struct zcdn_device;
117
118 static struct class *zcrypt_class;
119 static dev_t zcrypt_devt;
120 static struct cdev zcrypt_cdev;
121
122 struct zcdn_device {
123 struct device device;
124 struct ap_perms perms;
125 };
126
127 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
128
129 #define ZCDN_MAX_NAME 32
130
131 static int zcdn_create(const char *name);
132 static int zcdn_destroy(const char *name);
133
134 /*
135 * Find zcdn device by name.
136 * Returns reference to the zcdn device which needs to be released
137 * with put_device() after use.
138 */
find_zcdndev_by_name(const char * name)139 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
140 {
141 struct device *dev = class_find_device_by_name(zcrypt_class, name);
142
143 return dev ? to_zcdn_dev(dev) : NULL;
144 }
145
146 /*
147 * Find zcdn device by devt value.
148 * Returns reference to the zcdn device which needs to be released
149 * with put_device() after use.
150 */
find_zcdndev_by_devt(dev_t devt)151 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
152 {
153 struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
154
155 return dev ? to_zcdn_dev(dev) : NULL;
156 }
157
ioctlmask_show(struct device * dev,struct device_attribute * attr,char * buf)158 static ssize_t ioctlmask_show(struct device *dev,
159 struct device_attribute *attr,
160 char *buf)
161 {
162 int i, rc;
163 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
164
165 if (mutex_lock_interruptible(&ap_perms_mutex))
166 return -ERESTARTSYS;
167
168 buf[0] = '0';
169 buf[1] = 'x';
170 for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
171 snprintf(buf + 2 + 2 * i * sizeof(long),
172 PAGE_SIZE - 2 - 2 * i * sizeof(long),
173 "%016lx", zcdndev->perms.ioctlm[i]);
174 buf[2 + 2 * i * sizeof(long)] = '\n';
175 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
176 rc = 2 + 2 * i * sizeof(long) + 1;
177
178 mutex_unlock(&ap_perms_mutex);
179
180 return rc;
181 }
182
ioctlmask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)183 static ssize_t ioctlmask_store(struct device *dev,
184 struct device_attribute *attr,
185 const char *buf, size_t count)
186 {
187 int rc;
188 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
189
190 rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
191 AP_IOCTLS, &ap_perms_mutex);
192 if (rc)
193 return rc;
194
195 return count;
196 }
197
198 static DEVICE_ATTR_RW(ioctlmask);
199
apmask_show(struct device * dev,struct device_attribute * attr,char * buf)200 static ssize_t apmask_show(struct device *dev,
201 struct device_attribute *attr,
202 char *buf)
203 {
204 int i, rc;
205 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
206
207 if (mutex_lock_interruptible(&ap_perms_mutex))
208 return -ERESTARTSYS;
209
210 buf[0] = '0';
211 buf[1] = 'x';
212 for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
213 snprintf(buf + 2 + 2 * i * sizeof(long),
214 PAGE_SIZE - 2 - 2 * i * sizeof(long),
215 "%016lx", zcdndev->perms.apm[i]);
216 buf[2 + 2 * i * sizeof(long)] = '\n';
217 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
218 rc = 2 + 2 * i * sizeof(long) + 1;
219
220 mutex_unlock(&ap_perms_mutex);
221
222 return rc;
223 }
224
apmask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)225 static ssize_t apmask_store(struct device *dev,
226 struct device_attribute *attr,
227 const char *buf, size_t count)
228 {
229 int rc;
230 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
231
232 rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
233 AP_DEVICES, &ap_perms_mutex);
234 if (rc)
235 return rc;
236
237 return count;
238 }
239
240 static DEVICE_ATTR_RW(apmask);
241
aqmask_show(struct device * dev,struct device_attribute * attr,char * buf)242 static ssize_t aqmask_show(struct device *dev,
243 struct device_attribute *attr,
244 char *buf)
245 {
246 int i, rc;
247 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
248
249 if (mutex_lock_interruptible(&ap_perms_mutex))
250 return -ERESTARTSYS;
251
252 buf[0] = '0';
253 buf[1] = 'x';
254 for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
255 snprintf(buf + 2 + 2 * i * sizeof(long),
256 PAGE_SIZE - 2 - 2 * i * sizeof(long),
257 "%016lx", zcdndev->perms.aqm[i]);
258 buf[2 + 2 * i * sizeof(long)] = '\n';
259 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
260 rc = 2 + 2 * i * sizeof(long) + 1;
261
262 mutex_unlock(&ap_perms_mutex);
263
264 return rc;
265 }
266
aqmask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)267 static ssize_t aqmask_store(struct device *dev,
268 struct device_attribute *attr,
269 const char *buf, size_t count)
270 {
271 int rc;
272 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
273
274 rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
275 AP_DOMAINS, &ap_perms_mutex);
276 if (rc)
277 return rc;
278
279 return count;
280 }
281
282 static DEVICE_ATTR_RW(aqmask);
283
admask_show(struct device * dev,struct device_attribute * attr,char * buf)284 static ssize_t admask_show(struct device *dev,
285 struct device_attribute *attr,
286 char *buf)
287 {
288 int i, rc;
289 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
290
291 if (mutex_lock_interruptible(&ap_perms_mutex))
292 return -ERESTARTSYS;
293
294 buf[0] = '0';
295 buf[1] = 'x';
296 for (i = 0; i < sizeof(zcdndev->perms.adm) / sizeof(long); i++)
297 snprintf(buf + 2 + 2 * i * sizeof(long),
298 PAGE_SIZE - 2 - 2 * i * sizeof(long),
299 "%016lx", zcdndev->perms.adm[i]);
300 buf[2 + 2 * i * sizeof(long)] = '\n';
301 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
302 rc = 2 + 2 * i * sizeof(long) + 1;
303
304 mutex_unlock(&ap_perms_mutex);
305
306 return rc;
307 }
308
admask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)309 static ssize_t admask_store(struct device *dev,
310 struct device_attribute *attr,
311 const char *buf, size_t count)
312 {
313 int rc;
314 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
315
316 rc = ap_parse_mask_str(buf, zcdndev->perms.adm,
317 AP_DOMAINS, &ap_perms_mutex);
318 if (rc)
319 return rc;
320
321 return count;
322 }
323
324 static DEVICE_ATTR_RW(admask);
325
326 static struct attribute *zcdn_dev_attrs[] = {
327 &dev_attr_ioctlmask.attr,
328 &dev_attr_apmask.attr,
329 &dev_attr_aqmask.attr,
330 &dev_attr_admask.attr,
331 NULL
332 };
333
334 static struct attribute_group zcdn_dev_attr_group = {
335 .attrs = zcdn_dev_attrs
336 };
337
338 static const struct attribute_group *zcdn_dev_attr_groups[] = {
339 &zcdn_dev_attr_group,
340 NULL
341 };
342
zcdn_create_store(struct class * class,struct class_attribute * attr,const char * buf,size_t count)343 static ssize_t zcdn_create_store(struct class *class,
344 struct class_attribute *attr,
345 const char *buf, size_t count)
346 {
347 int rc;
348 char name[ZCDN_MAX_NAME];
349
350 strscpy(name, skip_spaces(buf), sizeof(name));
351
352 rc = zcdn_create(strim(name));
353
354 return rc ? rc : count;
355 }
356
357 static const struct class_attribute class_attr_zcdn_create =
358 __ATTR(create, 0600, NULL, zcdn_create_store);
359
zcdn_destroy_store(struct class * class,struct class_attribute * attr,const char * buf,size_t count)360 static ssize_t zcdn_destroy_store(struct class *class,
361 struct class_attribute *attr,
362 const char *buf, size_t count)
363 {
364 int rc;
365 char name[ZCDN_MAX_NAME];
366
367 strscpy(name, skip_spaces(buf), sizeof(name));
368
369 rc = zcdn_destroy(strim(name));
370
371 return rc ? rc : count;
372 }
373
374 static const struct class_attribute class_attr_zcdn_destroy =
375 __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
376
zcdn_device_release(struct device * dev)377 static void zcdn_device_release(struct device *dev)
378 {
379 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
380
381 ZCRYPT_DBF_INFO("%s releasing zcdn device %d:%d\n",
382 __func__, MAJOR(dev->devt), MINOR(dev->devt));
383
384 kfree(zcdndev);
385 }
386
zcdn_create(const char * name)387 static int zcdn_create(const char *name)
388 {
389 dev_t devt;
390 int i, rc = 0;
391 char nodename[ZCDN_MAX_NAME];
392 struct zcdn_device *zcdndev;
393
394 if (mutex_lock_interruptible(&ap_perms_mutex))
395 return -ERESTARTSYS;
396
397 /* check if device node with this name already exists */
398 if (name[0]) {
399 zcdndev = find_zcdndev_by_name(name);
400 if (zcdndev) {
401 put_device(&zcdndev->device);
402 rc = -EEXIST;
403 goto unlockout;
404 }
405 }
406
407 /* find an unused minor number */
408 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
409 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
410 zcdndev = find_zcdndev_by_devt(devt);
411 if (zcdndev)
412 put_device(&zcdndev->device);
413 else
414 break;
415 }
416 if (i == ZCRYPT_MAX_MINOR_NODES) {
417 rc = -ENOSPC;
418 goto unlockout;
419 }
420
421 /* alloc and prepare a new zcdn device */
422 zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
423 if (!zcdndev) {
424 rc = -ENOMEM;
425 goto unlockout;
426 }
427 zcdndev->device.release = zcdn_device_release;
428 zcdndev->device.class = zcrypt_class;
429 zcdndev->device.devt = devt;
430 zcdndev->device.groups = zcdn_dev_attr_groups;
431 if (name[0])
432 strncpy(nodename, name, sizeof(nodename));
433 else
434 snprintf(nodename, sizeof(nodename),
435 ZCRYPT_NAME "_%d", (int)MINOR(devt));
436 nodename[sizeof(nodename) - 1] = '\0';
437 if (dev_set_name(&zcdndev->device, nodename)) {
438 rc = -EINVAL;
439 goto unlockout;
440 }
441 rc = device_register(&zcdndev->device);
442 if (rc) {
443 put_device(&zcdndev->device);
444 goto unlockout;
445 }
446
447 ZCRYPT_DBF_INFO("%s created zcdn device %d:%d\n",
448 __func__, MAJOR(devt), MINOR(devt));
449
450 unlockout:
451 mutex_unlock(&ap_perms_mutex);
452 return rc;
453 }
454
zcdn_destroy(const char * name)455 static int zcdn_destroy(const char *name)
456 {
457 int rc = 0;
458 struct zcdn_device *zcdndev;
459
460 if (mutex_lock_interruptible(&ap_perms_mutex))
461 return -ERESTARTSYS;
462
463 /* try to find this zcdn device */
464 zcdndev = find_zcdndev_by_name(name);
465 if (!zcdndev) {
466 rc = -ENOENT;
467 goto unlockout;
468 }
469
470 /*
471 * The zcdn device is not hard destroyed. It is subject to
472 * reference counting and thus just needs to be unregistered.
473 */
474 put_device(&zcdndev->device);
475 device_unregister(&zcdndev->device);
476
477 unlockout:
478 mutex_unlock(&ap_perms_mutex);
479 return rc;
480 }
481
zcdn_destroy_all(void)482 static void zcdn_destroy_all(void)
483 {
484 int i;
485 dev_t devt;
486 struct zcdn_device *zcdndev;
487
488 mutex_lock(&ap_perms_mutex);
489 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
490 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
491 zcdndev = find_zcdndev_by_devt(devt);
492 if (zcdndev) {
493 put_device(&zcdndev->device);
494 device_unregister(&zcdndev->device);
495 }
496 }
497 mutex_unlock(&ap_perms_mutex);
498 }
499
500 #endif
501
502 /*
503 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
504 *
505 * This function is not supported beyond zcrypt 1.3.1.
506 */
zcrypt_read(struct file * filp,char __user * buf,size_t count,loff_t * f_pos)507 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
508 size_t count, loff_t *f_pos)
509 {
510 return -EPERM;
511 }
512
513 /*
514 * zcrypt_write(): Not allowed.
515 *
516 * Write is not allowed
517 */
zcrypt_write(struct file * filp,const char __user * buf,size_t count,loff_t * f_pos)518 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
519 size_t count, loff_t *f_pos)
520 {
521 return -EPERM;
522 }
523
524 /*
525 * zcrypt_open(): Count number of users.
526 *
527 * Device open function to count number of users.
528 */
zcrypt_open(struct inode * inode,struct file * filp)529 static int zcrypt_open(struct inode *inode, struct file *filp)
530 {
531 struct ap_perms *perms = &ap_perms;
532
533 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
534 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
535 struct zcdn_device *zcdndev;
536
537 if (mutex_lock_interruptible(&ap_perms_mutex))
538 return -ERESTARTSYS;
539 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
540 /* find returns a reference, no get_device() needed */
541 mutex_unlock(&ap_perms_mutex);
542 if (zcdndev)
543 perms = &zcdndev->perms;
544 }
545 #endif
546 filp->private_data = (void *)perms;
547
548 atomic_inc(&zcrypt_open_count);
549 return stream_open(inode, filp);
550 }
551
552 /*
553 * zcrypt_release(): Count number of users.
554 *
555 * Device close function to count number of users.
556 */
zcrypt_release(struct inode * inode,struct file * filp)557 static int zcrypt_release(struct inode *inode, struct file *filp)
558 {
559 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
560 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
561 struct zcdn_device *zcdndev;
562
563 mutex_lock(&ap_perms_mutex);
564 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
565 mutex_unlock(&ap_perms_mutex);
566 if (zcdndev) {
567 /* 2 puts here: one for find, one for open */
568 put_device(&zcdndev->device);
569 put_device(&zcdndev->device);
570 }
571 }
572 #endif
573
574 atomic_dec(&zcrypt_open_count);
575 return 0;
576 }
577
zcrypt_check_ioctl(struct ap_perms * perms,unsigned int cmd)578 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
579 unsigned int cmd)
580 {
581 int rc = -EPERM;
582 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
583
584 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
585 if (test_bit_inv(ioctlnr, perms->ioctlm))
586 rc = 0;
587 }
588
589 if (rc)
590 ZCRYPT_DBF_WARN("%s ioctl check failed: ioctlnr=0x%04x rc=%d\n",
591 __func__, ioctlnr, rc);
592
593 return rc;
594 }
595
zcrypt_check_card(struct ap_perms * perms,int card)596 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
597 {
598 return test_bit_inv(card, perms->apm) ? true : false;
599 }
600
zcrypt_check_queue(struct ap_perms * perms,int queue)601 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
602 {
603 return test_bit_inv(queue, perms->aqm) ? true : false;
604 }
605
zcrypt_pick_queue(struct zcrypt_card * zc,struct zcrypt_queue * zq,struct module ** pmod,unsigned int weight)606 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
607 struct zcrypt_queue *zq,
608 struct module **pmod,
609 unsigned int weight)
610 {
611 if (!zq || !try_module_get(zq->queue->ap_dev.device.driver->owner))
612 return NULL;
613 zcrypt_queue_get(zq);
614 get_device(&zq->queue->ap_dev.device);
615 atomic_add(weight, &zc->load);
616 atomic_add(weight, &zq->load);
617 zq->request_count++;
618 *pmod = zq->queue->ap_dev.device.driver->owner;
619 return zq;
620 }
621
zcrypt_drop_queue(struct zcrypt_card * zc,struct zcrypt_queue * zq,struct module * mod,unsigned int weight)622 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
623 struct zcrypt_queue *zq,
624 struct module *mod,
625 unsigned int weight)
626 {
627 zq->request_count--;
628 atomic_sub(weight, &zc->load);
629 atomic_sub(weight, &zq->load);
630 put_device(&zq->queue->ap_dev.device);
631 zcrypt_queue_put(zq);
632 module_put(mod);
633 }
634
zcrypt_card_compare(struct zcrypt_card * zc,struct zcrypt_card * pref_zc,unsigned int weight,unsigned int pref_weight)635 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
636 struct zcrypt_card *pref_zc,
637 unsigned int weight,
638 unsigned int pref_weight)
639 {
640 if (!pref_zc)
641 return true;
642 weight += atomic_read(&zc->load);
643 pref_weight += atomic_read(&pref_zc->load);
644 if (weight == pref_weight)
645 return atomic64_read(&zc->card->total_request_count) <
646 atomic64_read(&pref_zc->card->total_request_count);
647 return weight < pref_weight;
648 }
649
zcrypt_queue_compare(struct zcrypt_queue * zq,struct zcrypt_queue * pref_zq,unsigned int weight,unsigned int pref_weight)650 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
651 struct zcrypt_queue *pref_zq,
652 unsigned int weight,
653 unsigned int pref_weight)
654 {
655 if (!pref_zq)
656 return true;
657 weight += atomic_read(&zq->load);
658 pref_weight += atomic_read(&pref_zq->load);
659 if (weight == pref_weight)
660 return zq->queue->total_request_count <
661 pref_zq->queue->total_request_count;
662 return weight < pref_weight;
663 }
664
665 /*
666 * zcrypt ioctls.
667 */
zcrypt_rsa_modexpo(struct ap_perms * perms,struct zcrypt_track * tr,struct ica_rsa_modexpo * mex)668 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
669 struct zcrypt_track *tr,
670 struct ica_rsa_modexpo *mex)
671 {
672 struct zcrypt_card *zc, *pref_zc;
673 struct zcrypt_queue *zq, *pref_zq;
674 struct ap_message ap_msg;
675 unsigned int wgt = 0, pref_wgt = 0;
676 unsigned int func_code;
677 int cpen, qpen, qid = 0, rc = -ENODEV;
678 struct module *mod;
679
680 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
681
682 ap_init_message(&ap_msg);
683
684 #ifdef CONFIG_ZCRYPT_DEBUG
685 if (tr && tr->fi.cmd)
686 ap_msg.fi.cmd = tr->fi.cmd;
687 #endif
688
689 if (mex->outputdatalength < mex->inputdatalength) {
690 func_code = 0;
691 rc = -EINVAL;
692 goto out;
693 }
694
695 /*
696 * As long as outputdatalength is big enough, we can set the
697 * outputdatalength equal to the inputdatalength, since that is the
698 * number of bytes we will copy in any case
699 */
700 mex->outputdatalength = mex->inputdatalength;
701
702 rc = get_rsa_modex_fc(mex, &func_code);
703 if (rc)
704 goto out;
705
706 pref_zc = NULL;
707 pref_zq = NULL;
708 spin_lock(&zcrypt_list_lock);
709 for_each_zcrypt_card(zc) {
710 /* Check for usable accelarator or CCA card */
711 if (!zc->online || !zc->card->config || zc->card->chkstop ||
712 !(zc->card->functions & 0x18000000))
713 continue;
714 /* Check for size limits */
715 if (zc->min_mod_size > mex->inputdatalength ||
716 zc->max_mod_size < mex->inputdatalength)
717 continue;
718 /* check if device node has admission for this card */
719 if (!zcrypt_check_card(perms, zc->card->id))
720 continue;
721 /* get weight index of the card device */
722 wgt = zc->speed_rating[func_code];
723 /* penalty if this msg was previously sent via this card */
724 cpen = (tr && tr->again_counter && tr->last_qid &&
725 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
726 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
727 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
728 continue;
729 for_each_zcrypt_queue(zq, zc) {
730 /* check if device is usable and eligible */
731 if (!zq->online || !zq->ops->rsa_modexpo ||
732 !zq->queue->config || zq->queue->chkstop)
733 continue;
734 /* check if device node has admission for this queue */
735 if (!zcrypt_check_queue(perms,
736 AP_QID_QUEUE(zq->queue->qid)))
737 continue;
738 /* penalty if the msg was previously sent at this qid */
739 qpen = (tr && tr->again_counter && tr->last_qid &&
740 tr->last_qid == zq->queue->qid) ?
741 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
742 if (!zcrypt_queue_compare(zq, pref_zq,
743 wgt + cpen + qpen, pref_wgt))
744 continue;
745 pref_zc = zc;
746 pref_zq = zq;
747 pref_wgt = wgt + cpen + qpen;
748 }
749 }
750 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
751 spin_unlock(&zcrypt_list_lock);
752
753 if (!pref_zq) {
754 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
755 __func__);
756 rc = -ENODEV;
757 goto out;
758 }
759
760 qid = pref_zq->queue->qid;
761 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
762
763 spin_lock(&zcrypt_list_lock);
764 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
765 spin_unlock(&zcrypt_list_lock);
766
767 out:
768 ap_release_message(&ap_msg);
769 if (tr) {
770 tr->last_rc = rc;
771 tr->last_qid = qid;
772 }
773 trace_s390_zcrypt_rep(mex, func_code, rc,
774 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
775 return rc;
776 }
777
zcrypt_rsa_crt(struct ap_perms * perms,struct zcrypt_track * tr,struct ica_rsa_modexpo_crt * crt)778 static long zcrypt_rsa_crt(struct ap_perms *perms,
779 struct zcrypt_track *tr,
780 struct ica_rsa_modexpo_crt *crt)
781 {
782 struct zcrypt_card *zc, *pref_zc;
783 struct zcrypt_queue *zq, *pref_zq;
784 struct ap_message ap_msg;
785 unsigned int wgt = 0, pref_wgt = 0;
786 unsigned int func_code;
787 int cpen, qpen, qid = 0, rc = -ENODEV;
788 struct module *mod;
789
790 trace_s390_zcrypt_req(crt, TP_ICARSACRT);
791
792 ap_init_message(&ap_msg);
793
794 #ifdef CONFIG_ZCRYPT_DEBUG
795 if (tr && tr->fi.cmd)
796 ap_msg.fi.cmd = tr->fi.cmd;
797 #endif
798
799 if (crt->outputdatalength < crt->inputdatalength) {
800 func_code = 0;
801 rc = -EINVAL;
802 goto out;
803 }
804
805 /*
806 * As long as outputdatalength is big enough, we can set the
807 * outputdatalength equal to the inputdatalength, since that is the
808 * number of bytes we will copy in any case
809 */
810 crt->outputdatalength = crt->inputdatalength;
811
812 rc = get_rsa_crt_fc(crt, &func_code);
813 if (rc)
814 goto out;
815
816 pref_zc = NULL;
817 pref_zq = NULL;
818 spin_lock(&zcrypt_list_lock);
819 for_each_zcrypt_card(zc) {
820 /* Check for usable accelarator or CCA card */
821 if (!zc->online || !zc->card->config || zc->card->chkstop ||
822 !(zc->card->functions & 0x18000000))
823 continue;
824 /* Check for size limits */
825 if (zc->min_mod_size > crt->inputdatalength ||
826 zc->max_mod_size < crt->inputdatalength)
827 continue;
828 /* check if device node has admission for this card */
829 if (!zcrypt_check_card(perms, zc->card->id))
830 continue;
831 /* get weight index of the card device */
832 wgt = zc->speed_rating[func_code];
833 /* penalty if this msg was previously sent via this card */
834 cpen = (tr && tr->again_counter && tr->last_qid &&
835 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
836 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
837 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
838 continue;
839 for_each_zcrypt_queue(zq, zc) {
840 /* check if device is usable and eligible */
841 if (!zq->online || !zq->ops->rsa_modexpo_crt ||
842 !zq->queue->config || zq->queue->chkstop)
843 continue;
844 /* check if device node has admission for this queue */
845 if (!zcrypt_check_queue(perms,
846 AP_QID_QUEUE(zq->queue->qid)))
847 continue;
848 /* penalty if the msg was previously sent at this qid */
849 qpen = (tr && tr->again_counter && tr->last_qid &&
850 tr->last_qid == zq->queue->qid) ?
851 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
852 if (!zcrypt_queue_compare(zq, pref_zq,
853 wgt + cpen + qpen, pref_wgt))
854 continue;
855 pref_zc = zc;
856 pref_zq = zq;
857 pref_wgt = wgt + cpen + qpen;
858 }
859 }
860 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
861 spin_unlock(&zcrypt_list_lock);
862
863 if (!pref_zq) {
864 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
865 __func__);
866 rc = -ENODEV;
867 goto out;
868 }
869
870 qid = pref_zq->queue->qid;
871 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
872
873 spin_lock(&zcrypt_list_lock);
874 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
875 spin_unlock(&zcrypt_list_lock);
876
877 out:
878 ap_release_message(&ap_msg);
879 if (tr) {
880 tr->last_rc = rc;
881 tr->last_qid = qid;
882 }
883 trace_s390_zcrypt_rep(crt, func_code, rc,
884 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
885 return rc;
886 }
887
_zcrypt_send_cprb(bool userspace,struct ap_perms * perms,struct zcrypt_track * tr,struct ica_xcRB * xcrb)888 static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
889 struct zcrypt_track *tr,
890 struct ica_xcRB *xcrb)
891 {
892 struct zcrypt_card *zc, *pref_zc;
893 struct zcrypt_queue *zq, *pref_zq;
894 struct ap_message ap_msg;
895 unsigned int wgt = 0, pref_wgt = 0;
896 unsigned int func_code;
897 unsigned short *domain, tdom;
898 int cpen, qpen, qid = 0, rc = -ENODEV;
899 struct module *mod;
900
901 trace_s390_zcrypt_req(xcrb, TB_ZSECSENDCPRB);
902
903 xcrb->status = 0;
904 ap_init_message(&ap_msg);
905
906 #ifdef CONFIG_ZCRYPT_DEBUG
907 if (tr && tr->fi.cmd)
908 ap_msg.fi.cmd = tr->fi.cmd;
909 if (tr && tr->fi.action == AP_FI_ACTION_CCA_AGENT_FF) {
910 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid agent_ID 'FF'\n",
911 __func__, tr->fi.cmd);
912 xcrb->agent_ID = 0x4646;
913 }
914 #endif
915
916 rc = prep_cca_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
917 if (rc)
918 goto out;
919
920 tdom = *domain;
921 if (perms != &ap_perms && tdom < AP_DOMAINS) {
922 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
923 if (!test_bit_inv(tdom, perms->adm)) {
924 rc = -ENODEV;
925 goto out;
926 }
927 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
928 rc = -EOPNOTSUPP;
929 goto out;
930 }
931 }
932 /*
933 * If a valid target domain is set and this domain is NOT a usage
934 * domain but a control only domain, autoselect target domain.
935 */
936 if (tdom < AP_DOMAINS &&
937 !ap_test_config_usage_domain(tdom) &&
938 ap_test_config_ctrl_domain(tdom))
939 tdom = AUTOSEL_DOM;
940
941 pref_zc = NULL;
942 pref_zq = NULL;
943 spin_lock(&zcrypt_list_lock);
944 for_each_zcrypt_card(zc) {
945 /* Check for usable CCA card */
946 if (!zc->online || !zc->card->config || zc->card->chkstop ||
947 !(zc->card->functions & 0x10000000))
948 continue;
949 /* Check for user selected CCA card */
950 if (xcrb->user_defined != AUTOSELECT &&
951 xcrb->user_defined != zc->card->id)
952 continue;
953 /* check if request size exceeds card max msg size */
954 if (ap_msg.len > zc->card->maxmsgsize)
955 continue;
956 /* check if device node has admission for this card */
957 if (!zcrypt_check_card(perms, zc->card->id))
958 continue;
959 /* get weight index of the card device */
960 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
961 /* penalty if this msg was previously sent via this card */
962 cpen = (tr && tr->again_counter && tr->last_qid &&
963 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
964 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
965 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
966 continue;
967 for_each_zcrypt_queue(zq, zc) {
968 /* check for device usable and eligible */
969 if (!zq->online || !zq->ops->send_cprb ||
970 !zq->queue->config || zq->queue->chkstop ||
971 (tdom != AUTOSEL_DOM &&
972 tdom != AP_QID_QUEUE(zq->queue->qid)))
973 continue;
974 /* check if device node has admission for this queue */
975 if (!zcrypt_check_queue(perms,
976 AP_QID_QUEUE(zq->queue->qid)))
977 continue;
978 /* penalty if the msg was previously sent at this qid */
979 qpen = (tr && tr->again_counter && tr->last_qid &&
980 tr->last_qid == zq->queue->qid) ?
981 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
982 if (!zcrypt_queue_compare(zq, pref_zq,
983 wgt + cpen + qpen, pref_wgt))
984 continue;
985 pref_zc = zc;
986 pref_zq = zq;
987 pref_wgt = wgt + cpen + qpen;
988 }
989 }
990 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
991 spin_unlock(&zcrypt_list_lock);
992
993 if (!pref_zq) {
994 ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n",
995 __func__, xcrb->user_defined, *domain);
996 rc = -ENODEV;
997 goto out;
998 }
999
1000 /* in case of auto select, provide the correct domain */
1001 qid = pref_zq->queue->qid;
1002 if (*domain == AUTOSEL_DOM)
1003 *domain = AP_QID_QUEUE(qid);
1004
1005 #ifdef CONFIG_ZCRYPT_DEBUG
1006 if (tr && tr->fi.action == AP_FI_ACTION_CCA_DOM_INVAL) {
1007 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid domain\n",
1008 __func__, tr->fi.cmd);
1009 *domain = 99;
1010 }
1011 #endif
1012
1013 rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcrb, &ap_msg);
1014
1015 spin_lock(&zcrypt_list_lock);
1016 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1017 spin_unlock(&zcrypt_list_lock);
1018
1019 out:
1020 ap_release_message(&ap_msg);
1021 if (tr) {
1022 tr->last_rc = rc;
1023 tr->last_qid = qid;
1024 }
1025 trace_s390_zcrypt_rep(xcrb, func_code, rc,
1026 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1027 return rc;
1028 }
1029
zcrypt_send_cprb(struct ica_xcRB * xcrb)1030 long zcrypt_send_cprb(struct ica_xcRB *xcrb)
1031 {
1032 return _zcrypt_send_cprb(false, &ap_perms, NULL, xcrb);
1033 }
1034 EXPORT_SYMBOL(zcrypt_send_cprb);
1035
is_desired_ep11_card(unsigned int dev_id,unsigned short target_num,struct ep11_target_dev * targets)1036 static bool is_desired_ep11_card(unsigned int dev_id,
1037 unsigned short target_num,
1038 struct ep11_target_dev *targets)
1039 {
1040 while (target_num-- > 0) {
1041 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
1042 return true;
1043 targets++;
1044 }
1045 return false;
1046 }
1047
is_desired_ep11_queue(unsigned int dev_qid,unsigned short target_num,struct ep11_target_dev * targets)1048 static bool is_desired_ep11_queue(unsigned int dev_qid,
1049 unsigned short target_num,
1050 struct ep11_target_dev *targets)
1051 {
1052 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
1053
1054 while (target_num-- > 0) {
1055 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
1056 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
1057 return true;
1058 targets++;
1059 }
1060 return false;
1061 }
1062
_zcrypt_send_ep11_cprb(bool userspace,struct ap_perms * perms,struct zcrypt_track * tr,struct ep11_urb * xcrb)1063 static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
1064 struct zcrypt_track *tr,
1065 struct ep11_urb *xcrb)
1066 {
1067 struct zcrypt_card *zc, *pref_zc;
1068 struct zcrypt_queue *zq, *pref_zq;
1069 struct ep11_target_dev *targets;
1070 unsigned short target_num;
1071 unsigned int wgt = 0, pref_wgt = 0;
1072 unsigned int func_code, domain;
1073 struct ap_message ap_msg;
1074 int cpen, qpen, qid = 0, rc = -ENODEV;
1075 struct module *mod;
1076
1077 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
1078
1079 ap_init_message(&ap_msg);
1080
1081 #ifdef CONFIG_ZCRYPT_DEBUG
1082 if (tr && tr->fi.cmd)
1083 ap_msg.fi.cmd = tr->fi.cmd;
1084 #endif
1085
1086 target_num = (unsigned short)xcrb->targets_num;
1087
1088 /* empty list indicates autoselect (all available targets) */
1089 targets = NULL;
1090 if (target_num != 0) {
1091 struct ep11_target_dev __user *uptr;
1092
1093 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
1094 if (!targets) {
1095 func_code = 0;
1096 rc = -ENOMEM;
1097 goto out;
1098 }
1099
1100 uptr = (struct ep11_target_dev __force __user *)xcrb->targets;
1101 if (z_copy_from_user(userspace, targets, uptr,
1102 target_num * sizeof(*targets))) {
1103 func_code = 0;
1104 rc = -EFAULT;
1105 goto out_free;
1106 }
1107 }
1108
1109 rc = prep_ep11_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
1110 if (rc)
1111 goto out_free;
1112
1113 if (perms != &ap_perms && domain < AUTOSEL_DOM) {
1114 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
1115 if (!test_bit_inv(domain, perms->adm)) {
1116 rc = -ENODEV;
1117 goto out_free;
1118 }
1119 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
1120 rc = -EOPNOTSUPP;
1121 goto out_free;
1122 }
1123 }
1124
1125 pref_zc = NULL;
1126 pref_zq = NULL;
1127 spin_lock(&zcrypt_list_lock);
1128 for_each_zcrypt_card(zc) {
1129 /* Check for usable EP11 card */
1130 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1131 !(zc->card->functions & 0x04000000))
1132 continue;
1133 /* Check for user selected EP11 card */
1134 if (targets &&
1135 !is_desired_ep11_card(zc->card->id, target_num, targets))
1136 continue;
1137 /* check if request size exceeds card max msg size */
1138 if (ap_msg.len > zc->card->maxmsgsize)
1139 continue;
1140 /* check if device node has admission for this card */
1141 if (!zcrypt_check_card(perms, zc->card->id))
1142 continue;
1143 /* get weight index of the card device */
1144 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1145 /* penalty if this msg was previously sent via this card */
1146 cpen = (tr && tr->again_counter && tr->last_qid &&
1147 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
1148 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
1149 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
1150 continue;
1151 for_each_zcrypt_queue(zq, zc) {
1152 /* check if device is usable and eligible */
1153 if (!zq->online || !zq->ops->send_ep11_cprb ||
1154 !zq->queue->config || zq->queue->chkstop ||
1155 (targets &&
1156 !is_desired_ep11_queue(zq->queue->qid,
1157 target_num, targets)))
1158 continue;
1159 /* check if device node has admission for this queue */
1160 if (!zcrypt_check_queue(perms,
1161 AP_QID_QUEUE(zq->queue->qid)))
1162 continue;
1163 /* penalty if the msg was previously sent at this qid */
1164 qpen = (tr && tr->again_counter && tr->last_qid &&
1165 tr->last_qid == zq->queue->qid) ?
1166 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
1167 if (!zcrypt_queue_compare(zq, pref_zq,
1168 wgt + cpen + qpen, pref_wgt))
1169 continue;
1170 pref_zc = zc;
1171 pref_zq = zq;
1172 pref_wgt = wgt + cpen + qpen;
1173 }
1174 }
1175 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1176 spin_unlock(&zcrypt_list_lock);
1177
1178 if (!pref_zq) {
1179 if (targets && target_num == 1) {
1180 ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n",
1181 __func__, (int)targets->ap_id,
1182 (int)targets->dom_id);
1183 } else if (targets) {
1184 ZCRYPT_DBF_DBG("%s no match for %d target addrs => ENODEV\n",
1185 __func__, (int)target_num);
1186 } else {
1187 ZCRYPT_DBF_DBG("%s no match for address ff.ffff => ENODEV\n",
1188 __func__);
1189 }
1190 rc = -ENODEV;
1191 goto out_free;
1192 }
1193
1194 qid = pref_zq->queue->qid;
1195 rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
1196
1197 spin_lock(&zcrypt_list_lock);
1198 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1199 spin_unlock(&zcrypt_list_lock);
1200
1201 out_free:
1202 kfree(targets);
1203 out:
1204 ap_release_message(&ap_msg);
1205 if (tr) {
1206 tr->last_rc = rc;
1207 tr->last_qid = qid;
1208 }
1209 trace_s390_zcrypt_rep(xcrb, func_code, rc,
1210 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1211 return rc;
1212 }
1213
zcrypt_send_ep11_cprb(struct ep11_urb * xcrb)1214 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1215 {
1216 return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb);
1217 }
1218 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1219
zcrypt_rng(char * buffer)1220 static long zcrypt_rng(char *buffer)
1221 {
1222 struct zcrypt_card *zc, *pref_zc;
1223 struct zcrypt_queue *zq, *pref_zq;
1224 unsigned int wgt = 0, pref_wgt = 0;
1225 unsigned int func_code;
1226 struct ap_message ap_msg;
1227 unsigned int domain;
1228 int qid = 0, rc = -ENODEV;
1229 struct module *mod;
1230
1231 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1232
1233 ap_init_message(&ap_msg);
1234 rc = prep_rng_ap_msg(&ap_msg, &func_code, &domain);
1235 if (rc)
1236 goto out;
1237
1238 pref_zc = NULL;
1239 pref_zq = NULL;
1240 spin_lock(&zcrypt_list_lock);
1241 for_each_zcrypt_card(zc) {
1242 /* Check for usable CCA card */
1243 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1244 !(zc->card->functions & 0x10000000))
1245 continue;
1246 /* get weight index of the card device */
1247 wgt = zc->speed_rating[func_code];
1248 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
1249 continue;
1250 for_each_zcrypt_queue(zq, zc) {
1251 /* check if device is usable and eligible */
1252 if (!zq->online || !zq->ops->rng ||
1253 !zq->queue->config || zq->queue->chkstop)
1254 continue;
1255 if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
1256 continue;
1257 pref_zc = zc;
1258 pref_zq = zq;
1259 pref_wgt = wgt;
1260 }
1261 }
1262 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1263 spin_unlock(&zcrypt_list_lock);
1264
1265 if (!pref_zq) {
1266 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
1267 __func__);
1268 rc = -ENODEV;
1269 goto out;
1270 }
1271
1272 qid = pref_zq->queue->qid;
1273 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1274
1275 spin_lock(&zcrypt_list_lock);
1276 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1277 spin_unlock(&zcrypt_list_lock);
1278
1279 out:
1280 ap_release_message(&ap_msg);
1281 trace_s390_zcrypt_rep(buffer, func_code, rc,
1282 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1283 return rc;
1284 }
1285
zcrypt_device_status_mask(struct zcrypt_device_status * devstatus)1286 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1287 {
1288 struct zcrypt_card *zc;
1289 struct zcrypt_queue *zq;
1290 struct zcrypt_device_status *stat;
1291 int card, queue;
1292
1293 memset(devstatus, 0, MAX_ZDEV_ENTRIES
1294 * sizeof(struct zcrypt_device_status));
1295
1296 spin_lock(&zcrypt_list_lock);
1297 for_each_zcrypt_card(zc) {
1298 for_each_zcrypt_queue(zq, zc) {
1299 card = AP_QID_CARD(zq->queue->qid);
1300 if (card >= MAX_ZDEV_CARDIDS)
1301 continue;
1302 queue = AP_QID_QUEUE(zq->queue->qid);
1303 stat = &devstatus[card * AP_DOMAINS + queue];
1304 stat->hwtype = zc->card->ap_dev.device_type;
1305 stat->functions = zc->card->functions >> 26;
1306 stat->qid = zq->queue->qid;
1307 stat->online = zq->online ? 0x01 : 0x00;
1308 }
1309 }
1310 spin_unlock(&zcrypt_list_lock);
1311 }
1312
zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext * devstatus)1313 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1314 {
1315 struct zcrypt_card *zc;
1316 struct zcrypt_queue *zq;
1317 struct zcrypt_device_status_ext *stat;
1318 int card, queue;
1319
1320 memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1321 * sizeof(struct zcrypt_device_status_ext));
1322
1323 spin_lock(&zcrypt_list_lock);
1324 for_each_zcrypt_card(zc) {
1325 for_each_zcrypt_queue(zq, zc) {
1326 card = AP_QID_CARD(zq->queue->qid);
1327 queue = AP_QID_QUEUE(zq->queue->qid);
1328 stat = &devstatus[card * AP_DOMAINS + queue];
1329 stat->hwtype = zc->card->ap_dev.device_type;
1330 stat->functions = zc->card->functions >> 26;
1331 stat->qid = zq->queue->qid;
1332 stat->online = zq->online ? 0x01 : 0x00;
1333 }
1334 }
1335 spin_unlock(&zcrypt_list_lock);
1336 }
1337 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1338
zcrypt_device_status_ext(int card,int queue,struct zcrypt_device_status_ext * devstat)1339 int zcrypt_device_status_ext(int card, int queue,
1340 struct zcrypt_device_status_ext *devstat)
1341 {
1342 struct zcrypt_card *zc;
1343 struct zcrypt_queue *zq;
1344
1345 memset(devstat, 0, sizeof(*devstat));
1346
1347 spin_lock(&zcrypt_list_lock);
1348 for_each_zcrypt_card(zc) {
1349 for_each_zcrypt_queue(zq, zc) {
1350 if (card == AP_QID_CARD(zq->queue->qid) &&
1351 queue == AP_QID_QUEUE(zq->queue->qid)) {
1352 devstat->hwtype = zc->card->ap_dev.device_type;
1353 devstat->functions = zc->card->functions >> 26;
1354 devstat->qid = zq->queue->qid;
1355 devstat->online = zq->online ? 0x01 : 0x00;
1356 spin_unlock(&zcrypt_list_lock);
1357 return 0;
1358 }
1359 }
1360 }
1361 spin_unlock(&zcrypt_list_lock);
1362
1363 return -ENODEV;
1364 }
1365 EXPORT_SYMBOL(zcrypt_device_status_ext);
1366
zcrypt_status_mask(char status[],size_t max_adapters)1367 static void zcrypt_status_mask(char status[], size_t max_adapters)
1368 {
1369 struct zcrypt_card *zc;
1370 struct zcrypt_queue *zq;
1371 int card;
1372
1373 memset(status, 0, max_adapters);
1374 spin_lock(&zcrypt_list_lock);
1375 for_each_zcrypt_card(zc) {
1376 for_each_zcrypt_queue(zq, zc) {
1377 card = AP_QID_CARD(zq->queue->qid);
1378 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1379 card >= max_adapters)
1380 continue;
1381 status[card] = zc->online ? zc->user_space_type : 0x0d;
1382 }
1383 }
1384 spin_unlock(&zcrypt_list_lock);
1385 }
1386
zcrypt_qdepth_mask(char qdepth[],size_t max_adapters)1387 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1388 {
1389 struct zcrypt_card *zc;
1390 struct zcrypt_queue *zq;
1391 int card;
1392
1393 memset(qdepth, 0, max_adapters);
1394 spin_lock(&zcrypt_list_lock);
1395 local_bh_disable();
1396 for_each_zcrypt_card(zc) {
1397 for_each_zcrypt_queue(zq, zc) {
1398 card = AP_QID_CARD(zq->queue->qid);
1399 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1400 card >= max_adapters)
1401 continue;
1402 spin_lock(&zq->queue->lock);
1403 qdepth[card] =
1404 zq->queue->pendingq_count +
1405 zq->queue->requestq_count;
1406 spin_unlock(&zq->queue->lock);
1407 }
1408 }
1409 local_bh_enable();
1410 spin_unlock(&zcrypt_list_lock);
1411 }
1412
zcrypt_perdev_reqcnt(u32 reqcnt[],size_t max_adapters)1413 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1414 {
1415 struct zcrypt_card *zc;
1416 struct zcrypt_queue *zq;
1417 int card;
1418 u64 cnt;
1419
1420 memset(reqcnt, 0, sizeof(int) * max_adapters);
1421 spin_lock(&zcrypt_list_lock);
1422 local_bh_disable();
1423 for_each_zcrypt_card(zc) {
1424 for_each_zcrypt_queue(zq, zc) {
1425 card = AP_QID_CARD(zq->queue->qid);
1426 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1427 card >= max_adapters)
1428 continue;
1429 spin_lock(&zq->queue->lock);
1430 cnt = zq->queue->total_request_count;
1431 spin_unlock(&zq->queue->lock);
1432 reqcnt[card] = (cnt < UINT_MAX) ? (u32)cnt : UINT_MAX;
1433 }
1434 }
1435 local_bh_enable();
1436 spin_unlock(&zcrypt_list_lock);
1437 }
1438
zcrypt_pendingq_count(void)1439 static int zcrypt_pendingq_count(void)
1440 {
1441 struct zcrypt_card *zc;
1442 struct zcrypt_queue *zq;
1443 int pendingq_count;
1444
1445 pendingq_count = 0;
1446 spin_lock(&zcrypt_list_lock);
1447 local_bh_disable();
1448 for_each_zcrypt_card(zc) {
1449 for_each_zcrypt_queue(zq, zc) {
1450 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1451 continue;
1452 spin_lock(&zq->queue->lock);
1453 pendingq_count += zq->queue->pendingq_count;
1454 spin_unlock(&zq->queue->lock);
1455 }
1456 }
1457 local_bh_enable();
1458 spin_unlock(&zcrypt_list_lock);
1459 return pendingq_count;
1460 }
1461
zcrypt_requestq_count(void)1462 static int zcrypt_requestq_count(void)
1463 {
1464 struct zcrypt_card *zc;
1465 struct zcrypt_queue *zq;
1466 int requestq_count;
1467
1468 requestq_count = 0;
1469 spin_lock(&zcrypt_list_lock);
1470 local_bh_disable();
1471 for_each_zcrypt_card(zc) {
1472 for_each_zcrypt_queue(zq, zc) {
1473 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1474 continue;
1475 spin_lock(&zq->queue->lock);
1476 requestq_count += zq->queue->requestq_count;
1477 spin_unlock(&zq->queue->lock);
1478 }
1479 }
1480 local_bh_enable();
1481 spin_unlock(&zcrypt_list_lock);
1482 return requestq_count;
1483 }
1484
icarsamodexpo_ioctl(struct ap_perms * perms,unsigned long arg)1485 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1486 {
1487 int rc;
1488 struct zcrypt_track tr;
1489 struct ica_rsa_modexpo mex;
1490 struct ica_rsa_modexpo __user *umex = (void __user *)arg;
1491
1492 memset(&tr, 0, sizeof(tr));
1493 if (copy_from_user(&mex, umex, sizeof(mex)))
1494 return -EFAULT;
1495
1496 #ifdef CONFIG_ZCRYPT_DEBUG
1497 if (mex.inputdatalength & (1U << 31)) {
1498 if (!capable(CAP_SYS_ADMIN))
1499 return -EPERM;
1500 tr.fi.cmd = (u16)(mex.inputdatalength >> 16);
1501 }
1502 mex.inputdatalength &= 0x0000FFFF;
1503 #endif
1504
1505 do {
1506 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1507 if (rc == -EAGAIN)
1508 tr.again_counter++;
1509 #ifdef CONFIG_ZCRYPT_DEBUG
1510 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1511 break;
1512 #endif
1513 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1514 /* on failure: retry once again after a requested rescan */
1515 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1516 do {
1517 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1518 if (rc == -EAGAIN)
1519 tr.again_counter++;
1520 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1521 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1522 rc = -EIO;
1523 if (rc) {
1524 ZCRYPT_DBF_DBG("ioctl ICARSAMODEXPO rc=%d\n", rc);
1525 return rc;
1526 }
1527 return put_user(mex.outputdatalength, &umex->outputdatalength);
1528 }
1529
icarsacrt_ioctl(struct ap_perms * perms,unsigned long arg)1530 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1531 {
1532 int rc;
1533 struct zcrypt_track tr;
1534 struct ica_rsa_modexpo_crt crt;
1535 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *)arg;
1536
1537 memset(&tr, 0, sizeof(tr));
1538 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1539 return -EFAULT;
1540
1541 #ifdef CONFIG_ZCRYPT_DEBUG
1542 if (crt.inputdatalength & (1U << 31)) {
1543 if (!capable(CAP_SYS_ADMIN))
1544 return -EPERM;
1545 tr.fi.cmd = (u16)(crt.inputdatalength >> 16);
1546 }
1547 crt.inputdatalength &= 0x0000FFFF;
1548 #endif
1549
1550 do {
1551 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1552 if (rc == -EAGAIN)
1553 tr.again_counter++;
1554 #ifdef CONFIG_ZCRYPT_DEBUG
1555 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1556 break;
1557 #endif
1558 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1559 /* on failure: retry once again after a requested rescan */
1560 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1561 do {
1562 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1563 if (rc == -EAGAIN)
1564 tr.again_counter++;
1565 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1566 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1567 rc = -EIO;
1568 if (rc) {
1569 ZCRYPT_DBF_DBG("ioctl ICARSACRT rc=%d\n", rc);
1570 return rc;
1571 }
1572 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1573 }
1574
zsecsendcprb_ioctl(struct ap_perms * perms,unsigned long arg)1575 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1576 {
1577 int rc;
1578 struct ica_xcRB xcrb;
1579 struct zcrypt_track tr;
1580 struct ica_xcRB __user *uxcrb = (void __user *)arg;
1581
1582 memset(&tr, 0, sizeof(tr));
1583 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1584 return -EFAULT;
1585
1586 #ifdef CONFIG_ZCRYPT_DEBUG
1587 if ((xcrb.status & 0x8000FFFF) == 0x80004649 /* 'FI' */) {
1588 if (!capable(CAP_SYS_ADMIN))
1589 return -EPERM;
1590 tr.fi.cmd = (u16)(xcrb.status >> 16);
1591 }
1592 xcrb.status = 0;
1593 #endif
1594
1595 do {
1596 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1597 if (rc == -EAGAIN)
1598 tr.again_counter++;
1599 #ifdef CONFIG_ZCRYPT_DEBUG
1600 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1601 break;
1602 #endif
1603 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1604 /* on failure: retry once again after a requested rescan */
1605 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1606 do {
1607 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1608 if (rc == -EAGAIN)
1609 tr.again_counter++;
1610 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1611 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1612 rc = -EIO;
1613 if (rc)
1614 ZCRYPT_DBF_DBG("ioctl ZSENDCPRB rc=%d status=0x%x\n",
1615 rc, xcrb.status);
1616 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1617 return -EFAULT;
1618 return rc;
1619 }
1620
zsendep11cprb_ioctl(struct ap_perms * perms,unsigned long arg)1621 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1622 {
1623 int rc;
1624 struct ep11_urb xcrb;
1625 struct zcrypt_track tr;
1626 struct ep11_urb __user *uxcrb = (void __user *)arg;
1627
1628 memset(&tr, 0, sizeof(tr));
1629 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1630 return -EFAULT;
1631
1632 #ifdef CONFIG_ZCRYPT_DEBUG
1633 if (xcrb.req_len & (1ULL << 63)) {
1634 if (!capable(CAP_SYS_ADMIN))
1635 return -EPERM;
1636 tr.fi.cmd = (u16)(xcrb.req_len >> 48);
1637 }
1638 xcrb.req_len &= 0x0000FFFFFFFFFFFFULL;
1639 #endif
1640
1641 do {
1642 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1643 if (rc == -EAGAIN)
1644 tr.again_counter++;
1645 #ifdef CONFIG_ZCRYPT_DEBUG
1646 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1647 break;
1648 #endif
1649 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1650 /* on failure: retry once again after a requested rescan */
1651 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1652 do {
1653 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1654 if (rc == -EAGAIN)
1655 tr.again_counter++;
1656 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1657 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1658 rc = -EIO;
1659 if (rc)
1660 ZCRYPT_DBF_DBG("ioctl ZSENDEP11CPRB rc=%d\n", rc);
1661 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1662 return -EFAULT;
1663 return rc;
1664 }
1665
zcrypt_unlocked_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1666 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1667 unsigned long arg)
1668 {
1669 int rc;
1670 struct ap_perms *perms =
1671 (struct ap_perms *)filp->private_data;
1672
1673 rc = zcrypt_check_ioctl(perms, cmd);
1674 if (rc)
1675 return rc;
1676
1677 switch (cmd) {
1678 case ICARSAMODEXPO:
1679 return icarsamodexpo_ioctl(perms, arg);
1680 case ICARSACRT:
1681 return icarsacrt_ioctl(perms, arg);
1682 case ZSECSENDCPRB:
1683 return zsecsendcprb_ioctl(perms, arg);
1684 case ZSENDEP11CPRB:
1685 return zsendep11cprb_ioctl(perms, arg);
1686 case ZCRYPT_DEVICE_STATUS: {
1687 struct zcrypt_device_status_ext *device_status;
1688 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1689 * sizeof(struct zcrypt_device_status_ext);
1690
1691 device_status = kzalloc(total_size, GFP_KERNEL);
1692 if (!device_status)
1693 return -ENOMEM;
1694 zcrypt_device_status_mask_ext(device_status);
1695 if (copy_to_user((char __user *)arg, device_status,
1696 total_size))
1697 rc = -EFAULT;
1698 kfree(device_status);
1699 return rc;
1700 }
1701 case ZCRYPT_STATUS_MASK: {
1702 char status[AP_DEVICES];
1703
1704 zcrypt_status_mask(status, AP_DEVICES);
1705 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1706 return -EFAULT;
1707 return 0;
1708 }
1709 case ZCRYPT_QDEPTH_MASK: {
1710 char qdepth[AP_DEVICES];
1711
1712 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1713 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1714 return -EFAULT;
1715 return 0;
1716 }
1717 case ZCRYPT_PERDEV_REQCNT: {
1718 u32 *reqcnt;
1719
1720 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1721 if (!reqcnt)
1722 return -ENOMEM;
1723 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1724 if (copy_to_user((int __user *)arg, reqcnt,
1725 sizeof(u32) * AP_DEVICES))
1726 rc = -EFAULT;
1727 kfree(reqcnt);
1728 return rc;
1729 }
1730 case Z90STAT_REQUESTQ_COUNT:
1731 return put_user(zcrypt_requestq_count(), (int __user *)arg);
1732 case Z90STAT_PENDINGQ_COUNT:
1733 return put_user(zcrypt_pendingq_count(), (int __user *)arg);
1734 case Z90STAT_TOTALOPEN_COUNT:
1735 return put_user(atomic_read(&zcrypt_open_count),
1736 (int __user *)arg);
1737 case Z90STAT_DOMAIN_INDEX:
1738 return put_user(ap_domain_index, (int __user *)arg);
1739 /*
1740 * Deprecated ioctls
1741 */
1742 case ZDEVICESTATUS: {
1743 /* the old ioctl supports only 64 adapters */
1744 struct zcrypt_device_status *device_status;
1745 size_t total_size = MAX_ZDEV_ENTRIES
1746 * sizeof(struct zcrypt_device_status);
1747
1748 device_status = kzalloc(total_size, GFP_KERNEL);
1749 if (!device_status)
1750 return -ENOMEM;
1751 zcrypt_device_status_mask(device_status);
1752 if (copy_to_user((char __user *)arg, device_status,
1753 total_size))
1754 rc = -EFAULT;
1755 kfree(device_status);
1756 return rc;
1757 }
1758 case Z90STAT_STATUS_MASK: {
1759 /* the old ioctl supports only 64 adapters */
1760 char status[MAX_ZDEV_CARDIDS];
1761
1762 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1763 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1764 return -EFAULT;
1765 return 0;
1766 }
1767 case Z90STAT_QDEPTH_MASK: {
1768 /* the old ioctl supports only 64 adapters */
1769 char qdepth[MAX_ZDEV_CARDIDS];
1770
1771 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1772 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1773 return -EFAULT;
1774 return 0;
1775 }
1776 case Z90STAT_PERDEV_REQCNT: {
1777 /* the old ioctl supports only 64 adapters */
1778 u32 reqcnt[MAX_ZDEV_CARDIDS];
1779
1780 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1781 if (copy_to_user((int __user *)arg, reqcnt, sizeof(reqcnt)))
1782 return -EFAULT;
1783 return 0;
1784 }
1785 /* unknown ioctl number */
1786 default:
1787 ZCRYPT_DBF_DBG("unknown ioctl 0x%08x\n", cmd);
1788 return -ENOIOCTLCMD;
1789 }
1790 }
1791
1792 #ifdef CONFIG_COMPAT
1793 /*
1794 * ioctl32 conversion routines
1795 */
1796 struct compat_ica_rsa_modexpo {
1797 compat_uptr_t inputdata;
1798 unsigned int inputdatalength;
1799 compat_uptr_t outputdata;
1800 unsigned int outputdatalength;
1801 compat_uptr_t b_key;
1802 compat_uptr_t n_modulus;
1803 };
1804
trans_modexpo32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1805 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1806 unsigned int cmd, unsigned long arg)
1807 {
1808 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1809 struct compat_ica_rsa_modexpo mex32;
1810 struct ica_rsa_modexpo mex64;
1811 struct zcrypt_track tr;
1812 long rc;
1813
1814 memset(&tr, 0, sizeof(tr));
1815 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1816 return -EFAULT;
1817 mex64.inputdata = compat_ptr(mex32.inputdata);
1818 mex64.inputdatalength = mex32.inputdatalength;
1819 mex64.outputdata = compat_ptr(mex32.outputdata);
1820 mex64.outputdatalength = mex32.outputdatalength;
1821 mex64.b_key = compat_ptr(mex32.b_key);
1822 mex64.n_modulus = compat_ptr(mex32.n_modulus);
1823 do {
1824 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1825 if (rc == -EAGAIN)
1826 tr.again_counter++;
1827 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1828 /* on failure: retry once again after a requested rescan */
1829 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1830 do {
1831 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1832 if (rc == -EAGAIN)
1833 tr.again_counter++;
1834 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1835 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1836 rc = -EIO;
1837 if (rc)
1838 return rc;
1839 return put_user(mex64.outputdatalength,
1840 &umex32->outputdatalength);
1841 }
1842
1843 struct compat_ica_rsa_modexpo_crt {
1844 compat_uptr_t inputdata;
1845 unsigned int inputdatalength;
1846 compat_uptr_t outputdata;
1847 unsigned int outputdatalength;
1848 compat_uptr_t bp_key;
1849 compat_uptr_t bq_key;
1850 compat_uptr_t np_prime;
1851 compat_uptr_t nq_prime;
1852 compat_uptr_t u_mult_inv;
1853 };
1854
trans_modexpo_crt32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1855 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1856 unsigned int cmd, unsigned long arg)
1857 {
1858 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1859 struct compat_ica_rsa_modexpo_crt crt32;
1860 struct ica_rsa_modexpo_crt crt64;
1861 struct zcrypt_track tr;
1862 long rc;
1863
1864 memset(&tr, 0, sizeof(tr));
1865 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1866 return -EFAULT;
1867 crt64.inputdata = compat_ptr(crt32.inputdata);
1868 crt64.inputdatalength = crt32.inputdatalength;
1869 crt64.outputdata = compat_ptr(crt32.outputdata);
1870 crt64.outputdatalength = crt32.outputdatalength;
1871 crt64.bp_key = compat_ptr(crt32.bp_key);
1872 crt64.bq_key = compat_ptr(crt32.bq_key);
1873 crt64.np_prime = compat_ptr(crt32.np_prime);
1874 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1875 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1876 do {
1877 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1878 if (rc == -EAGAIN)
1879 tr.again_counter++;
1880 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1881 /* on failure: retry once again after a requested rescan */
1882 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1883 do {
1884 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1885 if (rc == -EAGAIN)
1886 tr.again_counter++;
1887 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1888 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1889 rc = -EIO;
1890 if (rc)
1891 return rc;
1892 return put_user(crt64.outputdatalength,
1893 &ucrt32->outputdatalength);
1894 }
1895
1896 struct compat_ica_xcrb {
1897 unsigned short agent_ID;
1898 unsigned int user_defined;
1899 unsigned short request_ID;
1900 unsigned int request_control_blk_length;
1901 unsigned char padding1[16 - sizeof(compat_uptr_t)];
1902 compat_uptr_t request_control_blk_addr;
1903 unsigned int request_data_length;
1904 char padding2[16 - sizeof(compat_uptr_t)];
1905 compat_uptr_t request_data_address;
1906 unsigned int reply_control_blk_length;
1907 char padding3[16 - sizeof(compat_uptr_t)];
1908 compat_uptr_t reply_control_blk_addr;
1909 unsigned int reply_data_length;
1910 char padding4[16 - sizeof(compat_uptr_t)];
1911 compat_uptr_t reply_data_addr;
1912 unsigned short priority_window;
1913 unsigned int status;
1914 } __packed;
1915
trans_xcrb32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1916 static long trans_xcrb32(struct ap_perms *perms, struct file *filp,
1917 unsigned int cmd, unsigned long arg)
1918 {
1919 struct compat_ica_xcrb __user *uxcrb32 = compat_ptr(arg);
1920 struct compat_ica_xcrb xcrb32;
1921 struct zcrypt_track tr;
1922 struct ica_xcRB xcrb64;
1923 long rc;
1924
1925 memset(&tr, 0, sizeof(tr));
1926 if (copy_from_user(&xcrb32, uxcrb32, sizeof(xcrb32)))
1927 return -EFAULT;
1928 xcrb64.agent_ID = xcrb32.agent_ID;
1929 xcrb64.user_defined = xcrb32.user_defined;
1930 xcrb64.request_ID = xcrb32.request_ID;
1931 xcrb64.request_control_blk_length =
1932 xcrb32.request_control_blk_length;
1933 xcrb64.request_control_blk_addr =
1934 compat_ptr(xcrb32.request_control_blk_addr);
1935 xcrb64.request_data_length =
1936 xcrb32.request_data_length;
1937 xcrb64.request_data_address =
1938 compat_ptr(xcrb32.request_data_address);
1939 xcrb64.reply_control_blk_length =
1940 xcrb32.reply_control_blk_length;
1941 xcrb64.reply_control_blk_addr =
1942 compat_ptr(xcrb32.reply_control_blk_addr);
1943 xcrb64.reply_data_length = xcrb32.reply_data_length;
1944 xcrb64.reply_data_addr =
1945 compat_ptr(xcrb32.reply_data_addr);
1946 xcrb64.priority_window = xcrb32.priority_window;
1947 xcrb64.status = xcrb32.status;
1948 do {
1949 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1950 if (rc == -EAGAIN)
1951 tr.again_counter++;
1952 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1953 /* on failure: retry once again after a requested rescan */
1954 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1955 do {
1956 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1957 if (rc == -EAGAIN)
1958 tr.again_counter++;
1959 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1960 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1961 rc = -EIO;
1962 xcrb32.reply_control_blk_length = xcrb64.reply_control_blk_length;
1963 xcrb32.reply_data_length = xcrb64.reply_data_length;
1964 xcrb32.status = xcrb64.status;
1965 if (copy_to_user(uxcrb32, &xcrb32, sizeof(xcrb32)))
1966 return -EFAULT;
1967 return rc;
1968 }
1969
zcrypt_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1970 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1971 unsigned long arg)
1972 {
1973 int rc;
1974 struct ap_perms *perms =
1975 (struct ap_perms *)filp->private_data;
1976
1977 rc = zcrypt_check_ioctl(perms, cmd);
1978 if (rc)
1979 return rc;
1980
1981 if (cmd == ICARSAMODEXPO)
1982 return trans_modexpo32(perms, filp, cmd, arg);
1983 if (cmd == ICARSACRT)
1984 return trans_modexpo_crt32(perms, filp, cmd, arg);
1985 if (cmd == ZSECSENDCPRB)
1986 return trans_xcrb32(perms, filp, cmd, arg);
1987 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1988 }
1989 #endif
1990
1991 /*
1992 * Misc device file operations.
1993 */
1994 static const struct file_operations zcrypt_fops = {
1995 .owner = THIS_MODULE,
1996 .read = zcrypt_read,
1997 .write = zcrypt_write,
1998 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1999 #ifdef CONFIG_COMPAT
2000 .compat_ioctl = zcrypt_compat_ioctl,
2001 #endif
2002 .open = zcrypt_open,
2003 .release = zcrypt_release,
2004 .llseek = no_llseek,
2005 };
2006
2007 /*
2008 * Misc device.
2009 */
2010 static struct miscdevice zcrypt_misc_device = {
2011 .minor = MISC_DYNAMIC_MINOR,
2012 .name = "z90crypt",
2013 .fops = &zcrypt_fops,
2014 };
2015
2016 static int zcrypt_rng_device_count;
2017 static u32 *zcrypt_rng_buffer;
2018 static int zcrypt_rng_buffer_index;
2019 static DEFINE_MUTEX(zcrypt_rng_mutex);
2020
zcrypt_rng_data_read(struct hwrng * rng,u32 * data)2021 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
2022 {
2023 int rc;
2024
2025 /*
2026 * We don't need locking here because the RNG API guarantees serialized
2027 * read method calls.
2028 */
2029 if (zcrypt_rng_buffer_index == 0) {
2030 rc = zcrypt_rng((char *)zcrypt_rng_buffer);
2031 /* on failure: retry once again after a requested rescan */
2032 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
2033 rc = zcrypt_rng((char *)zcrypt_rng_buffer);
2034 if (rc < 0)
2035 return -EIO;
2036 zcrypt_rng_buffer_index = rc / sizeof(*data);
2037 }
2038 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
2039 return sizeof(*data);
2040 }
2041
2042 static struct hwrng zcrypt_rng_dev = {
2043 .name = "zcrypt",
2044 .data_read = zcrypt_rng_data_read,
2045 .quality = 990,
2046 };
2047
zcrypt_rng_device_add(void)2048 int zcrypt_rng_device_add(void)
2049 {
2050 int rc = 0;
2051
2052 mutex_lock(&zcrypt_rng_mutex);
2053 if (zcrypt_rng_device_count == 0) {
2054 zcrypt_rng_buffer = (u32 *)get_zeroed_page(GFP_KERNEL);
2055 if (!zcrypt_rng_buffer) {
2056 rc = -ENOMEM;
2057 goto out;
2058 }
2059 zcrypt_rng_buffer_index = 0;
2060 rc = hwrng_register(&zcrypt_rng_dev);
2061 if (rc)
2062 goto out_free;
2063 zcrypt_rng_device_count = 1;
2064 } else {
2065 zcrypt_rng_device_count++;
2066 }
2067 mutex_unlock(&zcrypt_rng_mutex);
2068 return 0;
2069
2070 out_free:
2071 free_page((unsigned long)zcrypt_rng_buffer);
2072 out:
2073 mutex_unlock(&zcrypt_rng_mutex);
2074 return rc;
2075 }
2076
zcrypt_rng_device_remove(void)2077 void zcrypt_rng_device_remove(void)
2078 {
2079 mutex_lock(&zcrypt_rng_mutex);
2080 zcrypt_rng_device_count--;
2081 if (zcrypt_rng_device_count == 0) {
2082 hwrng_unregister(&zcrypt_rng_dev);
2083 free_page((unsigned long)zcrypt_rng_buffer);
2084 }
2085 mutex_unlock(&zcrypt_rng_mutex);
2086 }
2087
2088 /*
2089 * Wait until the zcrypt api is operational.
2090 * The AP bus scan and the binding of ap devices to device drivers is
2091 * an asynchronous job. This function waits until these initial jobs
2092 * are done and so the zcrypt api should be ready to serve crypto
2093 * requests - if there are resources available. The function uses an
2094 * internal timeout of 60s. The very first caller will either wait for
2095 * ap bus bindings complete or the timeout happens. This state will be
2096 * remembered for further callers which will only be blocked until a
2097 * decision is made (timeout or bindings complete).
2098 * On timeout -ETIME is returned, on success the return value is 0.
2099 */
zcrypt_wait_api_operational(void)2100 int zcrypt_wait_api_operational(void)
2101 {
2102 static DEFINE_MUTEX(zcrypt_wait_api_lock);
2103 static int zcrypt_wait_api_state;
2104 int rc;
2105
2106 rc = mutex_lock_interruptible(&zcrypt_wait_api_lock);
2107 if (rc)
2108 return rc;
2109
2110 switch (zcrypt_wait_api_state) {
2111 case 0:
2112 /* initial state, invoke wait for the ap bus complete */
2113 rc = ap_wait_init_apqn_bindings_complete(
2114 msecs_to_jiffies(60 * 1000));
2115 switch (rc) {
2116 case 0:
2117 /* ap bus bindings are complete */
2118 zcrypt_wait_api_state = 1;
2119 break;
2120 case -EINTR:
2121 /* interrupted, go back to caller */
2122 break;
2123 case -ETIME:
2124 /* timeout */
2125 ZCRYPT_DBF_WARN("%s ap_wait_init_apqn_bindings_complete()=ETIME\n",
2126 __func__);
2127 zcrypt_wait_api_state = -ETIME;
2128 break;
2129 default:
2130 /* other failure */
2131 ZCRYPT_DBF_DBG("%s ap_wait_init_apqn_bindings_complete()=%d\n",
2132 __func__, rc);
2133 break;
2134 }
2135 break;
2136 case 1:
2137 /* a previous caller already found ap bus bindings complete */
2138 rc = 0;
2139 break;
2140 default:
2141 /* a previous caller had timeout or other failure */
2142 rc = zcrypt_wait_api_state;
2143 break;
2144 }
2145
2146 mutex_unlock(&zcrypt_wait_api_lock);
2147
2148 return rc;
2149 }
2150 EXPORT_SYMBOL(zcrypt_wait_api_operational);
2151
zcrypt_debug_init(void)2152 int __init zcrypt_debug_init(void)
2153 {
2154 zcrypt_dbf_info = debug_register("zcrypt", 2, 1,
2155 DBF_MAX_SPRINTF_ARGS * sizeof(long));
2156 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
2157 debug_set_level(zcrypt_dbf_info, DBF_ERR);
2158
2159 return 0;
2160 }
2161
zcrypt_debug_exit(void)2162 void zcrypt_debug_exit(void)
2163 {
2164 debug_unregister(zcrypt_dbf_info);
2165 }
2166
2167 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2168
zcdn_init(void)2169 static int __init zcdn_init(void)
2170 {
2171 int rc;
2172
2173 /* create a new class 'zcrypt' */
2174 zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
2175 if (IS_ERR(zcrypt_class)) {
2176 rc = PTR_ERR(zcrypt_class);
2177 goto out_class_create_failed;
2178 }
2179 zcrypt_class->dev_release = zcdn_device_release;
2180
2181 /* alloc device minor range */
2182 rc = alloc_chrdev_region(&zcrypt_devt,
2183 0, ZCRYPT_MAX_MINOR_NODES,
2184 ZCRYPT_NAME);
2185 if (rc)
2186 goto out_alloc_chrdev_failed;
2187
2188 cdev_init(&zcrypt_cdev, &zcrypt_fops);
2189 zcrypt_cdev.owner = THIS_MODULE;
2190 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2191 if (rc)
2192 goto out_cdev_add_failed;
2193
2194 /* need some class specific sysfs attributes */
2195 rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
2196 if (rc)
2197 goto out_class_create_file_1_failed;
2198 rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
2199 if (rc)
2200 goto out_class_create_file_2_failed;
2201
2202 return 0;
2203
2204 out_class_create_file_2_failed:
2205 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2206 out_class_create_file_1_failed:
2207 cdev_del(&zcrypt_cdev);
2208 out_cdev_add_failed:
2209 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2210 out_alloc_chrdev_failed:
2211 class_destroy(zcrypt_class);
2212 out_class_create_failed:
2213 return rc;
2214 }
2215
zcdn_exit(void)2216 static void zcdn_exit(void)
2217 {
2218 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2219 class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
2220 zcdn_destroy_all();
2221 cdev_del(&zcrypt_cdev);
2222 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2223 class_destroy(zcrypt_class);
2224 }
2225
2226 #endif
2227
2228 /*
2229 * zcrypt_api_init(): Module initialization.
2230 *
2231 * The module initialization code.
2232 */
zcrypt_api_init(void)2233 int __init zcrypt_api_init(void)
2234 {
2235 int rc;
2236
2237 rc = zcrypt_debug_init();
2238 if (rc)
2239 goto out;
2240
2241 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2242 rc = zcdn_init();
2243 if (rc)
2244 goto out;
2245 #endif
2246
2247 /* Register the request sprayer. */
2248 rc = misc_register(&zcrypt_misc_device);
2249 if (rc < 0)
2250 goto out_misc_register_failed;
2251
2252 zcrypt_msgtype6_init();
2253 zcrypt_msgtype50_init();
2254
2255 return 0;
2256
2257 out_misc_register_failed:
2258 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2259 zcdn_exit();
2260 #endif
2261 zcrypt_debug_exit();
2262 out:
2263 return rc;
2264 }
2265
2266 /*
2267 * zcrypt_api_exit(): Module termination.
2268 *
2269 * The module termination code.
2270 */
zcrypt_api_exit(void)2271 void __exit zcrypt_api_exit(void)
2272 {
2273 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2274 zcdn_exit();
2275 #endif
2276 misc_deregister(&zcrypt_misc_device);
2277 zcrypt_msgtype6_exit();
2278 zcrypt_msgtype50_exit();
2279 zcrypt_ccamisc_exit();
2280 zcrypt_ep11misc_exit();
2281 zcrypt_debug_exit();
2282 }
2283
2284 module_init(zcrypt_api_init);
2285 module_exit(zcrypt_api_exit);
2286