1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright IBM Corp. 2001, 2018
4 * Author(s): Robert Burroughs
5 * Eric Rossman (edrossma@us.ibm.com)
6 * Cornelia Huck <cornelia.huck@de.ibm.com>
7 *
8 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
9 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
10 * Ralph Wuerthner <rwuerthn@de.ibm.com>
11 * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
12 * Multiple device nodes: Harald Freudenberger <freude@linux.ibm.com>
13 */
14
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/interrupt.h>
18 #include <linux/miscdevice.h>
19 #include <linux/fs.h>
20 #include <linux/compat.h>
21 #include <linux/slab.h>
22 #include <linux/atomic.h>
23 #include <linux/uaccess.h>
24 #include <linux/hw_random.h>
25 #include <linux/debugfs.h>
26 #include <linux/cdev.h>
27 #include <linux/ctype.h>
28 #include <linux/capability.h>
29 #include <asm/debug.h>
30
31 #define CREATE_TRACE_POINTS
32 #include <asm/trace/zcrypt.h>
33
34 #include "zcrypt_api.h"
35 #include "zcrypt_debug.h"
36
37 #include "zcrypt_msgtype6.h"
38 #include "zcrypt_msgtype50.h"
39 #include "zcrypt_ccamisc.h"
40 #include "zcrypt_ep11misc.h"
41
42 /*
43 * Module description.
44 */
45 MODULE_AUTHOR("IBM Corporation");
46 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
47 "Copyright IBM Corp. 2001, 2012");
48 MODULE_LICENSE("GPL");
49
50 /*
51 * zcrypt tracepoint functions
52 */
53 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
54 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
55
56 static int zcrypt_hwrng_seed = 1;
57 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
58 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
59
60 DEFINE_SPINLOCK(zcrypt_list_lock);
61 LIST_HEAD(zcrypt_card_list);
62
63 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
64 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
65
66 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
67 EXPORT_SYMBOL(zcrypt_rescan_req);
68
69 static LIST_HEAD(zcrypt_ops_list);
70
71 /* Zcrypt related debug feature stuff. */
72 debug_info_t *zcrypt_dbf_info;
73
74 /*
75 * Process a rescan of the transport layer.
76 *
77 * Returns 1, if the rescan has been processed, otherwise 0.
78 */
zcrypt_process_rescan(void)79 static inline int zcrypt_process_rescan(void)
80 {
81 if (atomic_read(&zcrypt_rescan_req)) {
82 atomic_set(&zcrypt_rescan_req, 0);
83 atomic_inc(&zcrypt_rescan_count);
84 ap_bus_force_rescan();
85 ZCRYPT_DBF_INFO("%s rescan count=%07d\n", __func__,
86 atomic_inc_return(&zcrypt_rescan_count));
87 return 1;
88 }
89 return 0;
90 }
91
zcrypt_msgtype_register(struct zcrypt_ops * zops)92 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
93 {
94 list_add_tail(&zops->list, &zcrypt_ops_list);
95 }
96
zcrypt_msgtype_unregister(struct zcrypt_ops * zops)97 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
98 {
99 list_del_init(&zops->list);
100 }
101
zcrypt_msgtype(unsigned char * name,int variant)102 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
103 {
104 struct zcrypt_ops *zops;
105
106 list_for_each_entry(zops, &zcrypt_ops_list, list)
107 if (zops->variant == variant &&
108 (!strncmp(zops->name, name, sizeof(zops->name))))
109 return zops;
110 return NULL;
111 }
112 EXPORT_SYMBOL(zcrypt_msgtype);
113
114 /*
115 * Multi device nodes extension functions.
116 */
117
118 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
119
120 struct zcdn_device;
121
122 static struct class *zcrypt_class;
123 static dev_t zcrypt_devt;
124 static struct cdev zcrypt_cdev;
125
126 struct zcdn_device {
127 struct device device;
128 struct ap_perms perms;
129 };
130
131 #define to_zcdn_dev(x) container_of((x), struct zcdn_device, device)
132
133 #define ZCDN_MAX_NAME 32
134
135 static int zcdn_create(const char *name);
136 static int zcdn_destroy(const char *name);
137
138 /*
139 * Find zcdn device by name.
140 * Returns reference to the zcdn device which needs to be released
141 * with put_device() after use.
142 */
find_zcdndev_by_name(const char * name)143 static inline struct zcdn_device *find_zcdndev_by_name(const char *name)
144 {
145 struct device *dev = class_find_device_by_name(zcrypt_class, name);
146
147 return dev ? to_zcdn_dev(dev) : NULL;
148 }
149
150 /*
151 * Find zcdn device by devt value.
152 * Returns reference to the zcdn device which needs to be released
153 * with put_device() after use.
154 */
find_zcdndev_by_devt(dev_t devt)155 static inline struct zcdn_device *find_zcdndev_by_devt(dev_t devt)
156 {
157 struct device *dev = class_find_device_by_devt(zcrypt_class, devt);
158
159 return dev ? to_zcdn_dev(dev) : NULL;
160 }
161
ioctlmask_show(struct device * dev,struct device_attribute * attr,char * buf)162 static ssize_t ioctlmask_show(struct device *dev,
163 struct device_attribute *attr,
164 char *buf)
165 {
166 int i, rc;
167 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
168
169 if (mutex_lock_interruptible(&ap_perms_mutex))
170 return -ERESTARTSYS;
171
172 buf[0] = '0';
173 buf[1] = 'x';
174 for (i = 0; i < sizeof(zcdndev->perms.ioctlm) / sizeof(long); i++)
175 snprintf(buf + 2 + 2 * i * sizeof(long),
176 PAGE_SIZE - 2 - 2 * i * sizeof(long),
177 "%016lx", zcdndev->perms.ioctlm[i]);
178 buf[2 + 2 * i * sizeof(long)] = '\n';
179 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
180 rc = 2 + 2 * i * sizeof(long) + 1;
181
182 mutex_unlock(&ap_perms_mutex);
183
184 return rc;
185 }
186
ioctlmask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)187 static ssize_t ioctlmask_store(struct device *dev,
188 struct device_attribute *attr,
189 const char *buf, size_t count)
190 {
191 int rc;
192 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
193
194 rc = ap_parse_mask_str(buf, zcdndev->perms.ioctlm,
195 AP_IOCTLS, &ap_perms_mutex);
196 if (rc)
197 return rc;
198
199 return count;
200 }
201
202 static DEVICE_ATTR_RW(ioctlmask);
203
apmask_show(struct device * dev,struct device_attribute * attr,char * buf)204 static ssize_t apmask_show(struct device *dev,
205 struct device_attribute *attr,
206 char *buf)
207 {
208 int i, rc;
209 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
210
211 if (mutex_lock_interruptible(&ap_perms_mutex))
212 return -ERESTARTSYS;
213
214 buf[0] = '0';
215 buf[1] = 'x';
216 for (i = 0; i < sizeof(zcdndev->perms.apm) / sizeof(long); i++)
217 snprintf(buf + 2 + 2 * i * sizeof(long),
218 PAGE_SIZE - 2 - 2 * i * sizeof(long),
219 "%016lx", zcdndev->perms.apm[i]);
220 buf[2 + 2 * i * sizeof(long)] = '\n';
221 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
222 rc = 2 + 2 * i * sizeof(long) + 1;
223
224 mutex_unlock(&ap_perms_mutex);
225
226 return rc;
227 }
228
apmask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)229 static ssize_t apmask_store(struct device *dev,
230 struct device_attribute *attr,
231 const char *buf, size_t count)
232 {
233 int rc;
234 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
235
236 rc = ap_parse_mask_str(buf, zcdndev->perms.apm,
237 AP_DEVICES, &ap_perms_mutex);
238 if (rc)
239 return rc;
240
241 return count;
242 }
243
244 static DEVICE_ATTR_RW(apmask);
245
aqmask_show(struct device * dev,struct device_attribute * attr,char * buf)246 static ssize_t aqmask_show(struct device *dev,
247 struct device_attribute *attr,
248 char *buf)
249 {
250 int i, rc;
251 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
252
253 if (mutex_lock_interruptible(&ap_perms_mutex))
254 return -ERESTARTSYS;
255
256 buf[0] = '0';
257 buf[1] = 'x';
258 for (i = 0; i < sizeof(zcdndev->perms.aqm) / sizeof(long); i++)
259 snprintf(buf + 2 + 2 * i * sizeof(long),
260 PAGE_SIZE - 2 - 2 * i * sizeof(long),
261 "%016lx", zcdndev->perms.aqm[i]);
262 buf[2 + 2 * i * sizeof(long)] = '\n';
263 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
264 rc = 2 + 2 * i * sizeof(long) + 1;
265
266 mutex_unlock(&ap_perms_mutex);
267
268 return rc;
269 }
270
aqmask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)271 static ssize_t aqmask_store(struct device *dev,
272 struct device_attribute *attr,
273 const char *buf, size_t count)
274 {
275 int rc;
276 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
277
278 rc = ap_parse_mask_str(buf, zcdndev->perms.aqm,
279 AP_DOMAINS, &ap_perms_mutex);
280 if (rc)
281 return rc;
282
283 return count;
284 }
285
286 static DEVICE_ATTR_RW(aqmask);
287
admask_show(struct device * dev,struct device_attribute * attr,char * buf)288 static ssize_t admask_show(struct device *dev,
289 struct device_attribute *attr,
290 char *buf)
291 {
292 int i, rc;
293 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
294
295 if (mutex_lock_interruptible(&ap_perms_mutex))
296 return -ERESTARTSYS;
297
298 buf[0] = '0';
299 buf[1] = 'x';
300 for (i = 0; i < sizeof(zcdndev->perms.adm) / sizeof(long); i++)
301 snprintf(buf + 2 + 2 * i * sizeof(long),
302 PAGE_SIZE - 2 - 2 * i * sizeof(long),
303 "%016lx", zcdndev->perms.adm[i]);
304 buf[2 + 2 * i * sizeof(long)] = '\n';
305 buf[2 + 2 * i * sizeof(long) + 1] = '\0';
306 rc = 2 + 2 * i * sizeof(long) + 1;
307
308 mutex_unlock(&ap_perms_mutex);
309
310 return rc;
311 }
312
admask_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)313 static ssize_t admask_store(struct device *dev,
314 struct device_attribute *attr,
315 const char *buf, size_t count)
316 {
317 int rc;
318 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
319
320 rc = ap_parse_mask_str(buf, zcdndev->perms.adm,
321 AP_DOMAINS, &ap_perms_mutex);
322 if (rc)
323 return rc;
324
325 return count;
326 }
327
328 static DEVICE_ATTR_RW(admask);
329
330 static struct attribute *zcdn_dev_attrs[] = {
331 &dev_attr_ioctlmask.attr,
332 &dev_attr_apmask.attr,
333 &dev_attr_aqmask.attr,
334 &dev_attr_admask.attr,
335 NULL
336 };
337
338 static struct attribute_group zcdn_dev_attr_group = {
339 .attrs = zcdn_dev_attrs
340 };
341
342 static const struct attribute_group *zcdn_dev_attr_groups[] = {
343 &zcdn_dev_attr_group,
344 NULL
345 };
346
zcdn_create_store(struct class * class,struct class_attribute * attr,const char * buf,size_t count)347 static ssize_t zcdn_create_store(struct class *class,
348 struct class_attribute *attr,
349 const char *buf, size_t count)
350 {
351 int rc;
352 char name[ZCDN_MAX_NAME];
353
354 strncpy(name, skip_spaces(buf), sizeof(name));
355 name[sizeof(name) - 1] = '\0';
356
357 rc = zcdn_create(strim(name));
358
359 return rc ? rc : count;
360 }
361
362 static const struct class_attribute class_attr_zcdn_create =
363 __ATTR(create, 0600, NULL, zcdn_create_store);
364
zcdn_destroy_store(struct class * class,struct class_attribute * attr,const char * buf,size_t count)365 static ssize_t zcdn_destroy_store(struct class *class,
366 struct class_attribute *attr,
367 const char *buf, size_t count)
368 {
369 int rc;
370 char name[ZCDN_MAX_NAME];
371
372 strncpy(name, skip_spaces(buf), sizeof(name));
373 name[sizeof(name) - 1] = '\0';
374
375 rc = zcdn_destroy(strim(name));
376
377 return rc ? rc : count;
378 }
379
380 static const struct class_attribute class_attr_zcdn_destroy =
381 __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
382
zcdn_device_release(struct device * dev)383 static void zcdn_device_release(struct device *dev)
384 {
385 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
386
387 ZCRYPT_DBF_INFO("%s releasing zcdn device %d:%d\n",
388 __func__, MAJOR(dev->devt), MINOR(dev->devt));
389
390 kfree(zcdndev);
391 }
392
zcdn_create(const char * name)393 static int zcdn_create(const char *name)
394 {
395 dev_t devt;
396 int i, rc = 0;
397 char nodename[ZCDN_MAX_NAME];
398 struct zcdn_device *zcdndev;
399
400 if (mutex_lock_interruptible(&ap_perms_mutex))
401 return -ERESTARTSYS;
402
403 /* check if device node with this name already exists */
404 if (name[0]) {
405 zcdndev = find_zcdndev_by_name(name);
406 if (zcdndev) {
407 put_device(&zcdndev->device);
408 rc = -EEXIST;
409 goto unlockout;
410 }
411 }
412
413 /* find an unused minor number */
414 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
415 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
416 zcdndev = find_zcdndev_by_devt(devt);
417 if (zcdndev)
418 put_device(&zcdndev->device);
419 else
420 break;
421 }
422 if (i == ZCRYPT_MAX_MINOR_NODES) {
423 rc = -ENOSPC;
424 goto unlockout;
425 }
426
427 /* alloc and prepare a new zcdn device */
428 zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
429 if (!zcdndev) {
430 rc = -ENOMEM;
431 goto unlockout;
432 }
433 zcdndev->device.release = zcdn_device_release;
434 zcdndev->device.class = zcrypt_class;
435 zcdndev->device.devt = devt;
436 zcdndev->device.groups = zcdn_dev_attr_groups;
437 if (name[0])
438 strncpy(nodename, name, sizeof(nodename));
439 else
440 snprintf(nodename, sizeof(nodename),
441 ZCRYPT_NAME "_%d", (int)MINOR(devt));
442 nodename[sizeof(nodename) - 1] = '\0';
443 if (dev_set_name(&zcdndev->device, nodename)) {
444 rc = -EINVAL;
445 goto unlockout;
446 }
447 rc = device_register(&zcdndev->device);
448 if (rc) {
449 put_device(&zcdndev->device);
450 goto unlockout;
451 }
452
453 ZCRYPT_DBF_INFO("%s created zcdn device %d:%d\n",
454 __func__, MAJOR(devt), MINOR(devt));
455
456 unlockout:
457 mutex_unlock(&ap_perms_mutex);
458 return rc;
459 }
460
zcdn_destroy(const char * name)461 static int zcdn_destroy(const char *name)
462 {
463 int rc = 0;
464 struct zcdn_device *zcdndev;
465
466 if (mutex_lock_interruptible(&ap_perms_mutex))
467 return -ERESTARTSYS;
468
469 /* try to find this zcdn device */
470 zcdndev = find_zcdndev_by_name(name);
471 if (!zcdndev) {
472 rc = -ENOENT;
473 goto unlockout;
474 }
475
476 /*
477 * The zcdn device is not hard destroyed. It is subject to
478 * reference counting and thus just needs to be unregistered.
479 */
480 put_device(&zcdndev->device);
481 device_unregister(&zcdndev->device);
482
483 unlockout:
484 mutex_unlock(&ap_perms_mutex);
485 return rc;
486 }
487
zcdn_destroy_all(void)488 static void zcdn_destroy_all(void)
489 {
490 int i;
491 dev_t devt;
492 struct zcdn_device *zcdndev;
493
494 mutex_lock(&ap_perms_mutex);
495 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
496 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
497 zcdndev = find_zcdndev_by_devt(devt);
498 if (zcdndev) {
499 put_device(&zcdndev->device);
500 device_unregister(&zcdndev->device);
501 }
502 }
503 mutex_unlock(&ap_perms_mutex);
504 }
505
506 #endif
507
508 /*
509 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
510 *
511 * This function is not supported beyond zcrypt 1.3.1.
512 */
zcrypt_read(struct file * filp,char __user * buf,size_t count,loff_t * f_pos)513 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
514 size_t count, loff_t *f_pos)
515 {
516 return -EPERM;
517 }
518
519 /*
520 * zcrypt_write(): Not allowed.
521 *
522 * Write is not allowed
523 */
zcrypt_write(struct file * filp,const char __user * buf,size_t count,loff_t * f_pos)524 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
525 size_t count, loff_t *f_pos)
526 {
527 return -EPERM;
528 }
529
530 /*
531 * zcrypt_open(): Count number of users.
532 *
533 * Device open function to count number of users.
534 */
zcrypt_open(struct inode * inode,struct file * filp)535 static int zcrypt_open(struct inode *inode, struct file *filp)
536 {
537 struct ap_perms *perms = &ap_perms;
538
539 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
540 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
541 struct zcdn_device *zcdndev;
542
543 if (mutex_lock_interruptible(&ap_perms_mutex))
544 return -ERESTARTSYS;
545 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
546 /* find returns a reference, no get_device() needed */
547 mutex_unlock(&ap_perms_mutex);
548 if (zcdndev)
549 perms = &zcdndev->perms;
550 }
551 #endif
552 filp->private_data = (void *)perms;
553
554 atomic_inc(&zcrypt_open_count);
555 return stream_open(inode, filp);
556 }
557
558 /*
559 * zcrypt_release(): Count number of users.
560 *
561 * Device close function to count number of users.
562 */
zcrypt_release(struct inode * inode,struct file * filp)563 static int zcrypt_release(struct inode *inode, struct file *filp)
564 {
565 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
566 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
567 struct zcdn_device *zcdndev;
568
569 mutex_lock(&ap_perms_mutex);
570 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
571 mutex_unlock(&ap_perms_mutex);
572 if (zcdndev) {
573 /* 2 puts here: one for find, one for open */
574 put_device(&zcdndev->device);
575 put_device(&zcdndev->device);
576 }
577 }
578 #endif
579
580 atomic_dec(&zcrypt_open_count);
581 return 0;
582 }
583
zcrypt_check_ioctl(struct ap_perms * perms,unsigned int cmd)584 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
585 unsigned int cmd)
586 {
587 int rc = -EPERM;
588 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
589
590 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
591 if (test_bit_inv(ioctlnr, perms->ioctlm))
592 rc = 0;
593 }
594
595 if (rc)
596 ZCRYPT_DBF_WARN("%s ioctl check failed: ioctlnr=0x%04x rc=%d\n",
597 __func__, ioctlnr, rc);
598
599 return rc;
600 }
601
zcrypt_check_card(struct ap_perms * perms,int card)602 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
603 {
604 return test_bit_inv(card, perms->apm) ? true : false;
605 }
606
zcrypt_check_queue(struct ap_perms * perms,int queue)607 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
608 {
609 return test_bit_inv(queue, perms->aqm) ? true : false;
610 }
611
zcrypt_pick_queue(struct zcrypt_card * zc,struct zcrypt_queue * zq,struct module ** pmod,unsigned int weight)612 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
613 struct zcrypt_queue *zq,
614 struct module **pmod,
615 unsigned int weight)
616 {
617 if (!zq || !try_module_get(zq->queue->ap_dev.device.driver->owner))
618 return NULL;
619 zcrypt_queue_get(zq);
620 get_device(&zq->queue->ap_dev.device);
621 atomic_add(weight, &zc->load);
622 atomic_add(weight, &zq->load);
623 zq->request_count++;
624 *pmod = zq->queue->ap_dev.device.driver->owner;
625 return zq;
626 }
627
zcrypt_drop_queue(struct zcrypt_card * zc,struct zcrypt_queue * zq,struct module * mod,unsigned int weight)628 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
629 struct zcrypt_queue *zq,
630 struct module *mod,
631 unsigned int weight)
632 {
633 zq->request_count--;
634 atomic_sub(weight, &zc->load);
635 atomic_sub(weight, &zq->load);
636 put_device(&zq->queue->ap_dev.device);
637 zcrypt_queue_put(zq);
638 module_put(mod);
639 }
640
zcrypt_card_compare(struct zcrypt_card * zc,struct zcrypt_card * pref_zc,unsigned int weight,unsigned int pref_weight)641 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
642 struct zcrypt_card *pref_zc,
643 unsigned int weight,
644 unsigned int pref_weight)
645 {
646 if (!pref_zc)
647 return true;
648 weight += atomic_read(&zc->load);
649 pref_weight += atomic_read(&pref_zc->load);
650 if (weight == pref_weight)
651 return atomic64_read(&zc->card->total_request_count) <
652 atomic64_read(&pref_zc->card->total_request_count);
653 return weight < pref_weight;
654 }
655
zcrypt_queue_compare(struct zcrypt_queue * zq,struct zcrypt_queue * pref_zq,unsigned int weight,unsigned int pref_weight)656 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
657 struct zcrypt_queue *pref_zq,
658 unsigned int weight,
659 unsigned int pref_weight)
660 {
661 if (!pref_zq)
662 return true;
663 weight += atomic_read(&zq->load);
664 pref_weight += atomic_read(&pref_zq->load);
665 if (weight == pref_weight)
666 return zq->queue->total_request_count <
667 pref_zq->queue->total_request_count;
668 return weight < pref_weight;
669 }
670
671 /*
672 * zcrypt ioctls.
673 */
zcrypt_rsa_modexpo(struct ap_perms * perms,struct zcrypt_track * tr,struct ica_rsa_modexpo * mex)674 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
675 struct zcrypt_track *tr,
676 struct ica_rsa_modexpo *mex)
677 {
678 struct zcrypt_card *zc, *pref_zc;
679 struct zcrypt_queue *zq, *pref_zq;
680 struct ap_message ap_msg;
681 unsigned int wgt = 0, pref_wgt = 0;
682 unsigned int func_code;
683 int cpen, qpen, qid = 0, rc = -ENODEV;
684 struct module *mod;
685
686 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
687
688 ap_init_message(&ap_msg);
689
690 #ifdef CONFIG_ZCRYPT_DEBUG
691 if (tr && tr->fi.cmd)
692 ap_msg.fi.cmd = tr->fi.cmd;
693 #endif
694
695 if (mex->outputdatalength < mex->inputdatalength) {
696 func_code = 0;
697 rc = -EINVAL;
698 goto out;
699 }
700
701 /*
702 * As long as outputdatalength is big enough, we can set the
703 * outputdatalength equal to the inputdatalength, since that is the
704 * number of bytes we will copy in any case
705 */
706 mex->outputdatalength = mex->inputdatalength;
707
708 rc = get_rsa_modex_fc(mex, &func_code);
709 if (rc)
710 goto out;
711
712 pref_zc = NULL;
713 pref_zq = NULL;
714 spin_lock(&zcrypt_list_lock);
715 for_each_zcrypt_card(zc) {
716 /* Check for usable accelarator or CCA card */
717 if (!zc->online || !zc->card->config || zc->card->chkstop ||
718 !(zc->card->functions & 0x18000000))
719 continue;
720 /* Check for size limits */
721 if (zc->min_mod_size > mex->inputdatalength ||
722 zc->max_mod_size < mex->inputdatalength)
723 continue;
724 /* check if device node has admission for this card */
725 if (!zcrypt_check_card(perms, zc->card->id))
726 continue;
727 /* get weight index of the card device */
728 wgt = zc->speed_rating[func_code];
729 /* penalty if this msg was previously sent via this card */
730 cpen = (tr && tr->again_counter && tr->last_qid &&
731 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
732 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
733 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
734 continue;
735 for_each_zcrypt_queue(zq, zc) {
736 /* check if device is usable and eligible */
737 if (!zq->online || !zq->ops->rsa_modexpo ||
738 !zq->queue->config || zq->queue->chkstop)
739 continue;
740 /* check if device node has admission for this queue */
741 if (!zcrypt_check_queue(perms,
742 AP_QID_QUEUE(zq->queue->qid)))
743 continue;
744 /* penalty if the msg was previously sent at this qid */
745 qpen = (tr && tr->again_counter && tr->last_qid &&
746 tr->last_qid == zq->queue->qid) ?
747 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
748 if (!zcrypt_queue_compare(zq, pref_zq,
749 wgt + cpen + qpen, pref_wgt))
750 continue;
751 pref_zc = zc;
752 pref_zq = zq;
753 pref_wgt = wgt + cpen + qpen;
754 }
755 }
756 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
757 spin_unlock(&zcrypt_list_lock);
758
759 if (!pref_zq) {
760 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
761 __func__);
762 rc = -ENODEV;
763 goto out;
764 }
765
766 qid = pref_zq->queue->qid;
767 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
768
769 spin_lock(&zcrypt_list_lock);
770 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
771 spin_unlock(&zcrypt_list_lock);
772
773 out:
774 ap_release_message(&ap_msg);
775 if (tr) {
776 tr->last_rc = rc;
777 tr->last_qid = qid;
778 }
779 trace_s390_zcrypt_rep(mex, func_code, rc,
780 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
781 return rc;
782 }
783
zcrypt_rsa_crt(struct ap_perms * perms,struct zcrypt_track * tr,struct ica_rsa_modexpo_crt * crt)784 static long zcrypt_rsa_crt(struct ap_perms *perms,
785 struct zcrypt_track *tr,
786 struct ica_rsa_modexpo_crt *crt)
787 {
788 struct zcrypt_card *zc, *pref_zc;
789 struct zcrypt_queue *zq, *pref_zq;
790 struct ap_message ap_msg;
791 unsigned int wgt = 0, pref_wgt = 0;
792 unsigned int func_code;
793 int cpen, qpen, qid = 0, rc = -ENODEV;
794 struct module *mod;
795
796 trace_s390_zcrypt_req(crt, TP_ICARSACRT);
797
798 ap_init_message(&ap_msg);
799
800 #ifdef CONFIG_ZCRYPT_DEBUG
801 if (tr && tr->fi.cmd)
802 ap_msg.fi.cmd = tr->fi.cmd;
803 #endif
804
805 if (crt->outputdatalength < crt->inputdatalength) {
806 func_code = 0;
807 rc = -EINVAL;
808 goto out;
809 }
810
811 /*
812 * As long as outputdatalength is big enough, we can set the
813 * outputdatalength equal to the inputdatalength, since that is the
814 * number of bytes we will copy in any case
815 */
816 crt->outputdatalength = crt->inputdatalength;
817
818 rc = get_rsa_crt_fc(crt, &func_code);
819 if (rc)
820 goto out;
821
822 pref_zc = NULL;
823 pref_zq = NULL;
824 spin_lock(&zcrypt_list_lock);
825 for_each_zcrypt_card(zc) {
826 /* Check for usable accelarator or CCA card */
827 if (!zc->online || !zc->card->config || zc->card->chkstop ||
828 !(zc->card->functions & 0x18000000))
829 continue;
830 /* Check for size limits */
831 if (zc->min_mod_size > crt->inputdatalength ||
832 zc->max_mod_size < crt->inputdatalength)
833 continue;
834 /* check if device node has admission for this card */
835 if (!zcrypt_check_card(perms, zc->card->id))
836 continue;
837 /* get weight index of the card device */
838 wgt = zc->speed_rating[func_code];
839 /* penalty if this msg was previously sent via this card */
840 cpen = (tr && tr->again_counter && tr->last_qid &&
841 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
842 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
843 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
844 continue;
845 for_each_zcrypt_queue(zq, zc) {
846 /* check if device is usable and eligible */
847 if (!zq->online || !zq->ops->rsa_modexpo_crt ||
848 !zq->queue->config || zq->queue->chkstop)
849 continue;
850 /* check if device node has admission for this queue */
851 if (!zcrypt_check_queue(perms,
852 AP_QID_QUEUE(zq->queue->qid)))
853 continue;
854 /* penalty if the msg was previously sent at this qid */
855 qpen = (tr && tr->again_counter && tr->last_qid &&
856 tr->last_qid == zq->queue->qid) ?
857 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
858 if (!zcrypt_queue_compare(zq, pref_zq,
859 wgt + cpen + qpen, pref_wgt))
860 continue;
861 pref_zc = zc;
862 pref_zq = zq;
863 pref_wgt = wgt + cpen + qpen;
864 }
865 }
866 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
867 spin_unlock(&zcrypt_list_lock);
868
869 if (!pref_zq) {
870 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
871 __func__);
872 rc = -ENODEV;
873 goto out;
874 }
875
876 qid = pref_zq->queue->qid;
877 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
878
879 spin_lock(&zcrypt_list_lock);
880 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
881 spin_unlock(&zcrypt_list_lock);
882
883 out:
884 ap_release_message(&ap_msg);
885 if (tr) {
886 tr->last_rc = rc;
887 tr->last_qid = qid;
888 }
889 trace_s390_zcrypt_rep(crt, func_code, rc,
890 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
891 return rc;
892 }
893
_zcrypt_send_cprb(bool userspace,struct ap_perms * perms,struct zcrypt_track * tr,struct ica_xcRB * xcrb)894 static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
895 struct zcrypt_track *tr,
896 struct ica_xcRB *xcrb)
897 {
898 struct zcrypt_card *zc, *pref_zc;
899 struct zcrypt_queue *zq, *pref_zq;
900 struct ap_message ap_msg;
901 unsigned int wgt = 0, pref_wgt = 0;
902 unsigned int func_code;
903 unsigned short *domain, tdom;
904 int cpen, qpen, qid = 0, rc = -ENODEV;
905 struct module *mod;
906
907 trace_s390_zcrypt_req(xcrb, TB_ZSECSENDCPRB);
908
909 xcrb->status = 0;
910 ap_init_message(&ap_msg);
911
912 #ifdef CONFIG_ZCRYPT_DEBUG
913 if (tr && tr->fi.cmd)
914 ap_msg.fi.cmd = tr->fi.cmd;
915 if (tr && tr->fi.action == AP_FI_ACTION_CCA_AGENT_FF) {
916 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid agent_ID 'FF'\n",
917 __func__, tr->fi.cmd);
918 xcrb->agent_ID = 0x4646;
919 }
920 #endif
921
922 rc = prep_cca_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
923 if (rc)
924 goto out;
925
926 tdom = *domain;
927 if (perms != &ap_perms && tdom < AP_DOMAINS) {
928 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
929 if (!test_bit_inv(tdom, perms->adm)) {
930 rc = -ENODEV;
931 goto out;
932 }
933 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
934 rc = -EOPNOTSUPP;
935 goto out;
936 }
937 }
938 /*
939 * If a valid target domain is set and this domain is NOT a usage
940 * domain but a control only domain, autoselect target domain.
941 */
942 if (tdom < AP_DOMAINS &&
943 !ap_test_config_usage_domain(tdom) &&
944 ap_test_config_ctrl_domain(tdom))
945 tdom = AUTOSEL_DOM;
946
947 pref_zc = NULL;
948 pref_zq = NULL;
949 spin_lock(&zcrypt_list_lock);
950 for_each_zcrypt_card(zc) {
951 /* Check for usable CCA card */
952 if (!zc->online || !zc->card->config || zc->card->chkstop ||
953 !(zc->card->functions & 0x10000000))
954 continue;
955 /* Check for user selected CCA card */
956 if (xcrb->user_defined != AUTOSELECT &&
957 xcrb->user_defined != zc->card->id)
958 continue;
959 /* check if request size exceeds card max msg size */
960 if (ap_msg.len > zc->card->maxmsgsize)
961 continue;
962 /* check if device node has admission for this card */
963 if (!zcrypt_check_card(perms, zc->card->id))
964 continue;
965 /* get weight index of the card device */
966 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
967 /* penalty if this msg was previously sent via this card */
968 cpen = (tr && tr->again_counter && tr->last_qid &&
969 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
970 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
971 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
972 continue;
973 for_each_zcrypt_queue(zq, zc) {
974 /* check for device usable and eligible */
975 if (!zq->online || !zq->ops->send_cprb ||
976 !zq->queue->config || zq->queue->chkstop ||
977 (tdom != AUTOSEL_DOM &&
978 tdom != AP_QID_QUEUE(zq->queue->qid)))
979 continue;
980 /* check if device node has admission for this queue */
981 if (!zcrypt_check_queue(perms,
982 AP_QID_QUEUE(zq->queue->qid)))
983 continue;
984 /* penalty if the msg was previously sent at this qid */
985 qpen = (tr && tr->again_counter && tr->last_qid &&
986 tr->last_qid == zq->queue->qid) ?
987 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
988 if (!zcrypt_queue_compare(zq, pref_zq,
989 wgt + cpen + qpen, pref_wgt))
990 continue;
991 pref_zc = zc;
992 pref_zq = zq;
993 pref_wgt = wgt + cpen + qpen;
994 }
995 }
996 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
997 spin_unlock(&zcrypt_list_lock);
998
999 if (!pref_zq) {
1000 ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n",
1001 __func__, xcrb->user_defined, *domain);
1002 rc = -ENODEV;
1003 goto out;
1004 }
1005
1006 /* in case of auto select, provide the correct domain */
1007 qid = pref_zq->queue->qid;
1008 if (*domain == AUTOSEL_DOM)
1009 *domain = AP_QID_QUEUE(qid);
1010
1011 #ifdef CONFIG_ZCRYPT_DEBUG
1012 if (tr && tr->fi.action == AP_FI_ACTION_CCA_DOM_INVAL) {
1013 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid domain\n",
1014 __func__, tr->fi.cmd);
1015 *domain = 99;
1016 }
1017 #endif
1018
1019 rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcrb, &ap_msg);
1020
1021 spin_lock(&zcrypt_list_lock);
1022 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1023 spin_unlock(&zcrypt_list_lock);
1024
1025 out:
1026 ap_release_message(&ap_msg);
1027 if (tr) {
1028 tr->last_rc = rc;
1029 tr->last_qid = qid;
1030 }
1031 trace_s390_zcrypt_rep(xcrb, func_code, rc,
1032 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1033 return rc;
1034 }
1035
zcrypt_send_cprb(struct ica_xcRB * xcrb)1036 long zcrypt_send_cprb(struct ica_xcRB *xcrb)
1037 {
1038 return _zcrypt_send_cprb(false, &ap_perms, NULL, xcrb);
1039 }
1040 EXPORT_SYMBOL(zcrypt_send_cprb);
1041
is_desired_ep11_card(unsigned int dev_id,unsigned short target_num,struct ep11_target_dev * targets)1042 static bool is_desired_ep11_card(unsigned int dev_id,
1043 unsigned short target_num,
1044 struct ep11_target_dev *targets)
1045 {
1046 while (target_num-- > 0) {
1047 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
1048 return true;
1049 targets++;
1050 }
1051 return false;
1052 }
1053
is_desired_ep11_queue(unsigned int dev_qid,unsigned short target_num,struct ep11_target_dev * targets)1054 static bool is_desired_ep11_queue(unsigned int dev_qid,
1055 unsigned short target_num,
1056 struct ep11_target_dev *targets)
1057 {
1058 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
1059
1060 while (target_num-- > 0) {
1061 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
1062 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
1063 return true;
1064 targets++;
1065 }
1066 return false;
1067 }
1068
_zcrypt_send_ep11_cprb(bool userspace,struct ap_perms * perms,struct zcrypt_track * tr,struct ep11_urb * xcrb)1069 static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
1070 struct zcrypt_track *tr,
1071 struct ep11_urb *xcrb)
1072 {
1073 struct zcrypt_card *zc, *pref_zc;
1074 struct zcrypt_queue *zq, *pref_zq;
1075 struct ep11_target_dev *targets;
1076 unsigned short target_num;
1077 unsigned int wgt = 0, pref_wgt = 0;
1078 unsigned int func_code, domain;
1079 struct ap_message ap_msg;
1080 int cpen, qpen, qid = 0, rc = -ENODEV;
1081 struct module *mod;
1082
1083 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
1084
1085 ap_init_message(&ap_msg);
1086
1087 #ifdef CONFIG_ZCRYPT_DEBUG
1088 if (tr && tr->fi.cmd)
1089 ap_msg.fi.cmd = tr->fi.cmd;
1090 #endif
1091
1092 target_num = (unsigned short)xcrb->targets_num;
1093
1094 /* empty list indicates autoselect (all available targets) */
1095 targets = NULL;
1096 if (target_num != 0) {
1097 struct ep11_target_dev __user *uptr;
1098
1099 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
1100 if (!targets) {
1101 func_code = 0;
1102 rc = -ENOMEM;
1103 goto out;
1104 }
1105
1106 uptr = (struct ep11_target_dev __force __user *)xcrb->targets;
1107 if (z_copy_from_user(userspace, targets, uptr,
1108 target_num * sizeof(*targets))) {
1109 func_code = 0;
1110 rc = -EFAULT;
1111 goto out_free;
1112 }
1113 }
1114
1115 rc = prep_ep11_ap_msg(userspace, xcrb, &ap_msg, &func_code, &domain);
1116 if (rc)
1117 goto out_free;
1118
1119 if (perms != &ap_perms && domain < AUTOSEL_DOM) {
1120 if (ap_msg.flags & AP_MSG_FLAG_ADMIN) {
1121 if (!test_bit_inv(domain, perms->adm)) {
1122 rc = -ENODEV;
1123 goto out_free;
1124 }
1125 } else if ((ap_msg.flags & AP_MSG_FLAG_USAGE) == 0) {
1126 rc = -EOPNOTSUPP;
1127 goto out_free;
1128 }
1129 }
1130
1131 pref_zc = NULL;
1132 pref_zq = NULL;
1133 spin_lock(&zcrypt_list_lock);
1134 for_each_zcrypt_card(zc) {
1135 /* Check for usable EP11 card */
1136 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1137 !(zc->card->functions & 0x04000000))
1138 continue;
1139 /* Check for user selected EP11 card */
1140 if (targets &&
1141 !is_desired_ep11_card(zc->card->id, target_num, targets))
1142 continue;
1143 /* check if request size exceeds card max msg size */
1144 if (ap_msg.len > zc->card->maxmsgsize)
1145 continue;
1146 /* check if device node has admission for this card */
1147 if (!zcrypt_check_card(perms, zc->card->id))
1148 continue;
1149 /* get weight index of the card device */
1150 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1151 /* penalty if this msg was previously sent via this card */
1152 cpen = (tr && tr->again_counter && tr->last_qid &&
1153 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
1154 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
1155 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
1156 continue;
1157 for_each_zcrypt_queue(zq, zc) {
1158 /* check if device is usable and eligible */
1159 if (!zq->online || !zq->ops->send_ep11_cprb ||
1160 !zq->queue->config || zq->queue->chkstop ||
1161 (targets &&
1162 !is_desired_ep11_queue(zq->queue->qid,
1163 target_num, targets)))
1164 continue;
1165 /* check if device node has admission for this queue */
1166 if (!zcrypt_check_queue(perms,
1167 AP_QID_QUEUE(zq->queue->qid)))
1168 continue;
1169 /* penalty if the msg was previously sent at this qid */
1170 qpen = (tr && tr->again_counter && tr->last_qid &&
1171 tr->last_qid == zq->queue->qid) ?
1172 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
1173 if (!zcrypt_queue_compare(zq, pref_zq,
1174 wgt + cpen + qpen, pref_wgt))
1175 continue;
1176 pref_zc = zc;
1177 pref_zq = zq;
1178 pref_wgt = wgt + cpen + qpen;
1179 }
1180 }
1181 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1182 spin_unlock(&zcrypt_list_lock);
1183
1184 if (!pref_zq) {
1185 if (targets && target_num == 1) {
1186 ZCRYPT_DBF_DBG("%s no match for address %02x.%04x => ENODEV\n",
1187 __func__, (int)targets->ap_id,
1188 (int)targets->dom_id);
1189 } else if (targets) {
1190 ZCRYPT_DBF_DBG("%s no match for %d target addrs => ENODEV\n",
1191 __func__, (int)target_num);
1192 } else {
1193 ZCRYPT_DBF_DBG("%s no match for address ff.ffff => ENODEV\n",
1194 __func__);
1195 }
1196 rc = -ENODEV;
1197 goto out_free;
1198 }
1199
1200 qid = pref_zq->queue->qid;
1201 rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
1202
1203 spin_lock(&zcrypt_list_lock);
1204 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1205 spin_unlock(&zcrypt_list_lock);
1206
1207 out_free:
1208 kfree(targets);
1209 out:
1210 ap_release_message(&ap_msg);
1211 if (tr) {
1212 tr->last_rc = rc;
1213 tr->last_qid = qid;
1214 }
1215 trace_s390_zcrypt_rep(xcrb, func_code, rc,
1216 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1217 return rc;
1218 }
1219
zcrypt_send_ep11_cprb(struct ep11_urb * xcrb)1220 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1221 {
1222 return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb);
1223 }
1224 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1225
zcrypt_rng(char * buffer)1226 static long zcrypt_rng(char *buffer)
1227 {
1228 struct zcrypt_card *zc, *pref_zc;
1229 struct zcrypt_queue *zq, *pref_zq;
1230 unsigned int wgt = 0, pref_wgt = 0;
1231 unsigned int func_code;
1232 struct ap_message ap_msg;
1233 unsigned int domain;
1234 int qid = 0, rc = -ENODEV;
1235 struct module *mod;
1236
1237 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1238
1239 ap_init_message(&ap_msg);
1240 rc = prep_rng_ap_msg(&ap_msg, &func_code, &domain);
1241 if (rc)
1242 goto out;
1243
1244 pref_zc = NULL;
1245 pref_zq = NULL;
1246 spin_lock(&zcrypt_list_lock);
1247 for_each_zcrypt_card(zc) {
1248 /* Check for usable CCA card */
1249 if (!zc->online || !zc->card->config || zc->card->chkstop ||
1250 !(zc->card->functions & 0x10000000))
1251 continue;
1252 /* get weight index of the card device */
1253 wgt = zc->speed_rating[func_code];
1254 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
1255 continue;
1256 for_each_zcrypt_queue(zq, zc) {
1257 /* check if device is usable and eligible */
1258 if (!zq->online || !zq->ops->rng ||
1259 !zq->queue->config || zq->queue->chkstop)
1260 continue;
1261 if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
1262 continue;
1263 pref_zc = zc;
1264 pref_zq = zq;
1265 pref_wgt = wgt;
1266 }
1267 }
1268 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1269 spin_unlock(&zcrypt_list_lock);
1270
1271 if (!pref_zq) {
1272 ZCRYPT_DBF_DBG("%s no matching queue found => ENODEV\n",
1273 __func__);
1274 rc = -ENODEV;
1275 goto out;
1276 }
1277
1278 qid = pref_zq->queue->qid;
1279 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1280
1281 spin_lock(&zcrypt_list_lock);
1282 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1283 spin_unlock(&zcrypt_list_lock);
1284
1285 out:
1286 ap_release_message(&ap_msg);
1287 trace_s390_zcrypt_rep(buffer, func_code, rc,
1288 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1289 return rc;
1290 }
1291
zcrypt_device_status_mask(struct zcrypt_device_status * devstatus)1292 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1293 {
1294 struct zcrypt_card *zc;
1295 struct zcrypt_queue *zq;
1296 struct zcrypt_device_status *stat;
1297 int card, queue;
1298
1299 memset(devstatus, 0, MAX_ZDEV_ENTRIES
1300 * sizeof(struct zcrypt_device_status));
1301
1302 spin_lock(&zcrypt_list_lock);
1303 for_each_zcrypt_card(zc) {
1304 for_each_zcrypt_queue(zq, zc) {
1305 card = AP_QID_CARD(zq->queue->qid);
1306 if (card >= MAX_ZDEV_CARDIDS)
1307 continue;
1308 queue = AP_QID_QUEUE(zq->queue->qid);
1309 stat = &devstatus[card * AP_DOMAINS + queue];
1310 stat->hwtype = zc->card->ap_dev.device_type;
1311 stat->functions = zc->card->functions >> 26;
1312 stat->qid = zq->queue->qid;
1313 stat->online = zq->online ? 0x01 : 0x00;
1314 }
1315 }
1316 spin_unlock(&zcrypt_list_lock);
1317 }
1318
zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext * devstatus)1319 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1320 {
1321 struct zcrypt_card *zc;
1322 struct zcrypt_queue *zq;
1323 struct zcrypt_device_status_ext *stat;
1324 int card, queue;
1325
1326 memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1327 * sizeof(struct zcrypt_device_status_ext));
1328
1329 spin_lock(&zcrypt_list_lock);
1330 for_each_zcrypt_card(zc) {
1331 for_each_zcrypt_queue(zq, zc) {
1332 card = AP_QID_CARD(zq->queue->qid);
1333 queue = AP_QID_QUEUE(zq->queue->qid);
1334 stat = &devstatus[card * AP_DOMAINS + queue];
1335 stat->hwtype = zc->card->ap_dev.device_type;
1336 stat->functions = zc->card->functions >> 26;
1337 stat->qid = zq->queue->qid;
1338 stat->online = zq->online ? 0x01 : 0x00;
1339 }
1340 }
1341 spin_unlock(&zcrypt_list_lock);
1342 }
1343 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1344
zcrypt_device_status_ext(int card,int queue,struct zcrypt_device_status_ext * devstat)1345 int zcrypt_device_status_ext(int card, int queue,
1346 struct zcrypt_device_status_ext *devstat)
1347 {
1348 struct zcrypt_card *zc;
1349 struct zcrypt_queue *zq;
1350
1351 memset(devstat, 0, sizeof(*devstat));
1352
1353 spin_lock(&zcrypt_list_lock);
1354 for_each_zcrypt_card(zc) {
1355 for_each_zcrypt_queue(zq, zc) {
1356 if (card == AP_QID_CARD(zq->queue->qid) &&
1357 queue == AP_QID_QUEUE(zq->queue->qid)) {
1358 devstat->hwtype = zc->card->ap_dev.device_type;
1359 devstat->functions = zc->card->functions >> 26;
1360 devstat->qid = zq->queue->qid;
1361 devstat->online = zq->online ? 0x01 : 0x00;
1362 spin_unlock(&zcrypt_list_lock);
1363 return 0;
1364 }
1365 }
1366 }
1367 spin_unlock(&zcrypt_list_lock);
1368
1369 return -ENODEV;
1370 }
1371 EXPORT_SYMBOL(zcrypt_device_status_ext);
1372
zcrypt_status_mask(char status[],size_t max_adapters)1373 static void zcrypt_status_mask(char status[], size_t max_adapters)
1374 {
1375 struct zcrypt_card *zc;
1376 struct zcrypt_queue *zq;
1377 int card;
1378
1379 memset(status, 0, max_adapters);
1380 spin_lock(&zcrypt_list_lock);
1381 for_each_zcrypt_card(zc) {
1382 for_each_zcrypt_queue(zq, zc) {
1383 card = AP_QID_CARD(zq->queue->qid);
1384 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1385 card >= max_adapters)
1386 continue;
1387 status[card] = zc->online ? zc->user_space_type : 0x0d;
1388 }
1389 }
1390 spin_unlock(&zcrypt_list_lock);
1391 }
1392
zcrypt_qdepth_mask(char qdepth[],size_t max_adapters)1393 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1394 {
1395 struct zcrypt_card *zc;
1396 struct zcrypt_queue *zq;
1397 int card;
1398
1399 memset(qdepth, 0, max_adapters);
1400 spin_lock(&zcrypt_list_lock);
1401 local_bh_disable();
1402 for_each_zcrypt_card(zc) {
1403 for_each_zcrypt_queue(zq, zc) {
1404 card = AP_QID_CARD(zq->queue->qid);
1405 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1406 card >= max_adapters)
1407 continue;
1408 spin_lock(&zq->queue->lock);
1409 qdepth[card] =
1410 zq->queue->pendingq_count +
1411 zq->queue->requestq_count;
1412 spin_unlock(&zq->queue->lock);
1413 }
1414 }
1415 local_bh_enable();
1416 spin_unlock(&zcrypt_list_lock);
1417 }
1418
zcrypt_perdev_reqcnt(u32 reqcnt[],size_t max_adapters)1419 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1420 {
1421 struct zcrypt_card *zc;
1422 struct zcrypt_queue *zq;
1423 int card;
1424 u64 cnt;
1425
1426 memset(reqcnt, 0, sizeof(int) * max_adapters);
1427 spin_lock(&zcrypt_list_lock);
1428 local_bh_disable();
1429 for_each_zcrypt_card(zc) {
1430 for_each_zcrypt_queue(zq, zc) {
1431 card = AP_QID_CARD(zq->queue->qid);
1432 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index ||
1433 card >= max_adapters)
1434 continue;
1435 spin_lock(&zq->queue->lock);
1436 cnt = zq->queue->total_request_count;
1437 spin_unlock(&zq->queue->lock);
1438 reqcnt[card] = (cnt < UINT_MAX) ? (u32)cnt : UINT_MAX;
1439 }
1440 }
1441 local_bh_enable();
1442 spin_unlock(&zcrypt_list_lock);
1443 }
1444
zcrypt_pendingq_count(void)1445 static int zcrypt_pendingq_count(void)
1446 {
1447 struct zcrypt_card *zc;
1448 struct zcrypt_queue *zq;
1449 int pendingq_count;
1450
1451 pendingq_count = 0;
1452 spin_lock(&zcrypt_list_lock);
1453 local_bh_disable();
1454 for_each_zcrypt_card(zc) {
1455 for_each_zcrypt_queue(zq, zc) {
1456 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1457 continue;
1458 spin_lock(&zq->queue->lock);
1459 pendingq_count += zq->queue->pendingq_count;
1460 spin_unlock(&zq->queue->lock);
1461 }
1462 }
1463 local_bh_enable();
1464 spin_unlock(&zcrypt_list_lock);
1465 return pendingq_count;
1466 }
1467
zcrypt_requestq_count(void)1468 static int zcrypt_requestq_count(void)
1469 {
1470 struct zcrypt_card *zc;
1471 struct zcrypt_queue *zq;
1472 int requestq_count;
1473
1474 requestq_count = 0;
1475 spin_lock(&zcrypt_list_lock);
1476 local_bh_disable();
1477 for_each_zcrypt_card(zc) {
1478 for_each_zcrypt_queue(zq, zc) {
1479 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1480 continue;
1481 spin_lock(&zq->queue->lock);
1482 requestq_count += zq->queue->requestq_count;
1483 spin_unlock(&zq->queue->lock);
1484 }
1485 }
1486 local_bh_enable();
1487 spin_unlock(&zcrypt_list_lock);
1488 return requestq_count;
1489 }
1490
icarsamodexpo_ioctl(struct ap_perms * perms,unsigned long arg)1491 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1492 {
1493 int rc;
1494 struct zcrypt_track tr;
1495 struct ica_rsa_modexpo mex;
1496 struct ica_rsa_modexpo __user *umex = (void __user *)arg;
1497
1498 memset(&tr, 0, sizeof(tr));
1499 if (copy_from_user(&mex, umex, sizeof(mex)))
1500 return -EFAULT;
1501
1502 #ifdef CONFIG_ZCRYPT_DEBUG
1503 if (mex.inputdatalength & (1U << 31)) {
1504 if (!capable(CAP_SYS_ADMIN))
1505 return -EPERM;
1506 tr.fi.cmd = (u16)(mex.inputdatalength >> 16);
1507 }
1508 mex.inputdatalength &= 0x0000FFFF;
1509 #endif
1510
1511 do {
1512 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1513 if (rc == -EAGAIN)
1514 tr.again_counter++;
1515 #ifdef CONFIG_ZCRYPT_DEBUG
1516 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1517 break;
1518 #endif
1519 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1520 /* on failure: retry once again after a requested rescan */
1521 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1522 do {
1523 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1524 if (rc == -EAGAIN)
1525 tr.again_counter++;
1526 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1527 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1528 rc = -EIO;
1529 if (rc) {
1530 ZCRYPT_DBF_DBG("ioctl ICARSAMODEXPO rc=%d\n", rc);
1531 return rc;
1532 }
1533 return put_user(mex.outputdatalength, &umex->outputdatalength);
1534 }
1535
icarsacrt_ioctl(struct ap_perms * perms,unsigned long arg)1536 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1537 {
1538 int rc;
1539 struct zcrypt_track tr;
1540 struct ica_rsa_modexpo_crt crt;
1541 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *)arg;
1542
1543 memset(&tr, 0, sizeof(tr));
1544 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1545 return -EFAULT;
1546
1547 #ifdef CONFIG_ZCRYPT_DEBUG
1548 if (crt.inputdatalength & (1U << 31)) {
1549 if (!capable(CAP_SYS_ADMIN))
1550 return -EPERM;
1551 tr.fi.cmd = (u16)(crt.inputdatalength >> 16);
1552 }
1553 crt.inputdatalength &= 0x0000FFFF;
1554 #endif
1555
1556 do {
1557 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1558 if (rc == -EAGAIN)
1559 tr.again_counter++;
1560 #ifdef CONFIG_ZCRYPT_DEBUG
1561 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1562 break;
1563 #endif
1564 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1565 /* on failure: retry once again after a requested rescan */
1566 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1567 do {
1568 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1569 if (rc == -EAGAIN)
1570 tr.again_counter++;
1571 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1572 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1573 rc = -EIO;
1574 if (rc) {
1575 ZCRYPT_DBF_DBG("ioctl ICARSACRT rc=%d\n", rc);
1576 return rc;
1577 }
1578 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1579 }
1580
zsecsendcprb_ioctl(struct ap_perms * perms,unsigned long arg)1581 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1582 {
1583 int rc;
1584 struct ica_xcRB xcrb;
1585 struct zcrypt_track tr;
1586 struct ica_xcRB __user *uxcrb = (void __user *)arg;
1587
1588 memset(&tr, 0, sizeof(tr));
1589 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1590 return -EFAULT;
1591
1592 #ifdef CONFIG_ZCRYPT_DEBUG
1593 if ((xcrb.status & 0x8000FFFF) == 0x80004649 /* 'FI' */) {
1594 if (!capable(CAP_SYS_ADMIN))
1595 return -EPERM;
1596 tr.fi.cmd = (u16)(xcrb.status >> 16);
1597 }
1598 xcrb.status = 0;
1599 #endif
1600
1601 do {
1602 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1603 if (rc == -EAGAIN)
1604 tr.again_counter++;
1605 #ifdef CONFIG_ZCRYPT_DEBUG
1606 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1607 break;
1608 #endif
1609 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1610 /* on failure: retry once again after a requested rescan */
1611 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1612 do {
1613 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb);
1614 if (rc == -EAGAIN)
1615 tr.again_counter++;
1616 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1617 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1618 rc = -EIO;
1619 if (rc)
1620 ZCRYPT_DBF_DBG("ioctl ZSENDCPRB rc=%d status=0x%x\n",
1621 rc, xcrb.status);
1622 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1623 return -EFAULT;
1624 return rc;
1625 }
1626
zsendep11cprb_ioctl(struct ap_perms * perms,unsigned long arg)1627 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1628 {
1629 int rc;
1630 struct ep11_urb xcrb;
1631 struct zcrypt_track tr;
1632 struct ep11_urb __user *uxcrb = (void __user *)arg;
1633
1634 memset(&tr, 0, sizeof(tr));
1635 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1636 return -EFAULT;
1637
1638 #ifdef CONFIG_ZCRYPT_DEBUG
1639 if (xcrb.req_len & (1ULL << 63)) {
1640 if (!capable(CAP_SYS_ADMIN))
1641 return -EPERM;
1642 tr.fi.cmd = (u16)(xcrb.req_len >> 48);
1643 }
1644 xcrb.req_len &= 0x0000FFFFFFFFFFFFULL;
1645 #endif
1646
1647 do {
1648 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1649 if (rc == -EAGAIN)
1650 tr.again_counter++;
1651 #ifdef CONFIG_ZCRYPT_DEBUG
1652 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1653 break;
1654 #endif
1655 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1656 /* on failure: retry once again after a requested rescan */
1657 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1658 do {
1659 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1660 if (rc == -EAGAIN)
1661 tr.again_counter++;
1662 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1663 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1664 rc = -EIO;
1665 if (rc)
1666 ZCRYPT_DBF_DBG("ioctl ZSENDEP11CPRB rc=%d\n", rc);
1667 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1668 return -EFAULT;
1669 return rc;
1670 }
1671
zcrypt_unlocked_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1672 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1673 unsigned long arg)
1674 {
1675 int rc;
1676 struct ap_perms *perms =
1677 (struct ap_perms *)filp->private_data;
1678
1679 rc = zcrypt_check_ioctl(perms, cmd);
1680 if (rc)
1681 return rc;
1682
1683 switch (cmd) {
1684 case ICARSAMODEXPO:
1685 return icarsamodexpo_ioctl(perms, arg);
1686 case ICARSACRT:
1687 return icarsacrt_ioctl(perms, arg);
1688 case ZSECSENDCPRB:
1689 return zsecsendcprb_ioctl(perms, arg);
1690 case ZSENDEP11CPRB:
1691 return zsendep11cprb_ioctl(perms, arg);
1692 case ZCRYPT_DEVICE_STATUS: {
1693 struct zcrypt_device_status_ext *device_status;
1694 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1695 * sizeof(struct zcrypt_device_status_ext);
1696
1697 device_status = kzalloc(total_size, GFP_KERNEL);
1698 if (!device_status)
1699 return -ENOMEM;
1700 zcrypt_device_status_mask_ext(device_status);
1701 if (copy_to_user((char __user *)arg, device_status,
1702 total_size))
1703 rc = -EFAULT;
1704 kfree(device_status);
1705 return rc;
1706 }
1707 case ZCRYPT_STATUS_MASK: {
1708 char status[AP_DEVICES];
1709
1710 zcrypt_status_mask(status, AP_DEVICES);
1711 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1712 return -EFAULT;
1713 return 0;
1714 }
1715 case ZCRYPT_QDEPTH_MASK: {
1716 char qdepth[AP_DEVICES];
1717
1718 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1719 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1720 return -EFAULT;
1721 return 0;
1722 }
1723 case ZCRYPT_PERDEV_REQCNT: {
1724 u32 *reqcnt;
1725
1726 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1727 if (!reqcnt)
1728 return -ENOMEM;
1729 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1730 if (copy_to_user((int __user *)arg, reqcnt,
1731 sizeof(u32) * AP_DEVICES))
1732 rc = -EFAULT;
1733 kfree(reqcnt);
1734 return rc;
1735 }
1736 case Z90STAT_REQUESTQ_COUNT:
1737 return put_user(zcrypt_requestq_count(), (int __user *)arg);
1738 case Z90STAT_PENDINGQ_COUNT:
1739 return put_user(zcrypt_pendingq_count(), (int __user *)arg);
1740 case Z90STAT_TOTALOPEN_COUNT:
1741 return put_user(atomic_read(&zcrypt_open_count),
1742 (int __user *)arg);
1743 case Z90STAT_DOMAIN_INDEX:
1744 return put_user(ap_domain_index, (int __user *)arg);
1745 /*
1746 * Deprecated ioctls
1747 */
1748 case ZDEVICESTATUS: {
1749 /* the old ioctl supports only 64 adapters */
1750 struct zcrypt_device_status *device_status;
1751 size_t total_size = MAX_ZDEV_ENTRIES
1752 * sizeof(struct zcrypt_device_status);
1753
1754 device_status = kzalloc(total_size, GFP_KERNEL);
1755 if (!device_status)
1756 return -ENOMEM;
1757 zcrypt_device_status_mask(device_status);
1758 if (copy_to_user((char __user *)arg, device_status,
1759 total_size))
1760 rc = -EFAULT;
1761 kfree(device_status);
1762 return rc;
1763 }
1764 case Z90STAT_STATUS_MASK: {
1765 /* the old ioctl supports only 64 adapters */
1766 char status[MAX_ZDEV_CARDIDS];
1767
1768 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1769 if (copy_to_user((char __user *)arg, status, sizeof(status)))
1770 return -EFAULT;
1771 return 0;
1772 }
1773 case Z90STAT_QDEPTH_MASK: {
1774 /* the old ioctl supports only 64 adapters */
1775 char qdepth[MAX_ZDEV_CARDIDS];
1776
1777 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1778 if (copy_to_user((char __user *)arg, qdepth, sizeof(qdepth)))
1779 return -EFAULT;
1780 return 0;
1781 }
1782 case Z90STAT_PERDEV_REQCNT: {
1783 /* the old ioctl supports only 64 adapters */
1784 u32 reqcnt[MAX_ZDEV_CARDIDS];
1785
1786 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1787 if (copy_to_user((int __user *)arg, reqcnt, sizeof(reqcnt)))
1788 return -EFAULT;
1789 return 0;
1790 }
1791 /* unknown ioctl number */
1792 default:
1793 ZCRYPT_DBF_DBG("unknown ioctl 0x%08x\n", cmd);
1794 return -ENOIOCTLCMD;
1795 }
1796 }
1797
1798 #ifdef CONFIG_COMPAT
1799 /*
1800 * ioctl32 conversion routines
1801 */
1802 struct compat_ica_rsa_modexpo {
1803 compat_uptr_t inputdata;
1804 unsigned int inputdatalength;
1805 compat_uptr_t outputdata;
1806 unsigned int outputdatalength;
1807 compat_uptr_t b_key;
1808 compat_uptr_t n_modulus;
1809 };
1810
trans_modexpo32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1811 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1812 unsigned int cmd, unsigned long arg)
1813 {
1814 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1815 struct compat_ica_rsa_modexpo mex32;
1816 struct ica_rsa_modexpo mex64;
1817 struct zcrypt_track tr;
1818 long rc;
1819
1820 memset(&tr, 0, sizeof(tr));
1821 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1822 return -EFAULT;
1823 mex64.inputdata = compat_ptr(mex32.inputdata);
1824 mex64.inputdatalength = mex32.inputdatalength;
1825 mex64.outputdata = compat_ptr(mex32.outputdata);
1826 mex64.outputdatalength = mex32.outputdatalength;
1827 mex64.b_key = compat_ptr(mex32.b_key);
1828 mex64.n_modulus = compat_ptr(mex32.n_modulus);
1829 do {
1830 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1831 if (rc == -EAGAIN)
1832 tr.again_counter++;
1833 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1834 /* on failure: retry once again after a requested rescan */
1835 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1836 do {
1837 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1838 if (rc == -EAGAIN)
1839 tr.again_counter++;
1840 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1841 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1842 rc = -EIO;
1843 if (rc)
1844 return rc;
1845 return put_user(mex64.outputdatalength,
1846 &umex32->outputdatalength);
1847 }
1848
1849 struct compat_ica_rsa_modexpo_crt {
1850 compat_uptr_t inputdata;
1851 unsigned int inputdatalength;
1852 compat_uptr_t outputdata;
1853 unsigned int outputdatalength;
1854 compat_uptr_t bp_key;
1855 compat_uptr_t bq_key;
1856 compat_uptr_t np_prime;
1857 compat_uptr_t nq_prime;
1858 compat_uptr_t u_mult_inv;
1859 };
1860
trans_modexpo_crt32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1861 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1862 unsigned int cmd, unsigned long arg)
1863 {
1864 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1865 struct compat_ica_rsa_modexpo_crt crt32;
1866 struct ica_rsa_modexpo_crt crt64;
1867 struct zcrypt_track tr;
1868 long rc;
1869
1870 memset(&tr, 0, sizeof(tr));
1871 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1872 return -EFAULT;
1873 crt64.inputdata = compat_ptr(crt32.inputdata);
1874 crt64.inputdatalength = crt32.inputdatalength;
1875 crt64.outputdata = compat_ptr(crt32.outputdata);
1876 crt64.outputdatalength = crt32.outputdatalength;
1877 crt64.bp_key = compat_ptr(crt32.bp_key);
1878 crt64.bq_key = compat_ptr(crt32.bq_key);
1879 crt64.np_prime = compat_ptr(crt32.np_prime);
1880 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1881 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1882 do {
1883 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1884 if (rc == -EAGAIN)
1885 tr.again_counter++;
1886 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1887 /* on failure: retry once again after a requested rescan */
1888 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1889 do {
1890 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1891 if (rc == -EAGAIN)
1892 tr.again_counter++;
1893 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1894 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1895 rc = -EIO;
1896 if (rc)
1897 return rc;
1898 return put_user(crt64.outputdatalength,
1899 &ucrt32->outputdatalength);
1900 }
1901
1902 struct compat_ica_xcrb {
1903 unsigned short agent_ID;
1904 unsigned int user_defined;
1905 unsigned short request_ID;
1906 unsigned int request_control_blk_length;
1907 unsigned char padding1[16 - sizeof(compat_uptr_t)];
1908 compat_uptr_t request_control_blk_addr;
1909 unsigned int request_data_length;
1910 char padding2[16 - sizeof(compat_uptr_t)];
1911 compat_uptr_t request_data_address;
1912 unsigned int reply_control_blk_length;
1913 char padding3[16 - sizeof(compat_uptr_t)];
1914 compat_uptr_t reply_control_blk_addr;
1915 unsigned int reply_data_length;
1916 char padding4[16 - sizeof(compat_uptr_t)];
1917 compat_uptr_t reply_data_addr;
1918 unsigned short priority_window;
1919 unsigned int status;
1920 } __packed;
1921
trans_xcrb32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1922 static long trans_xcrb32(struct ap_perms *perms, struct file *filp,
1923 unsigned int cmd, unsigned long arg)
1924 {
1925 struct compat_ica_xcrb __user *uxcrb32 = compat_ptr(arg);
1926 struct compat_ica_xcrb xcrb32;
1927 struct zcrypt_track tr;
1928 struct ica_xcRB xcrb64;
1929 long rc;
1930
1931 memset(&tr, 0, sizeof(tr));
1932 if (copy_from_user(&xcrb32, uxcrb32, sizeof(xcrb32)))
1933 return -EFAULT;
1934 xcrb64.agent_ID = xcrb32.agent_ID;
1935 xcrb64.user_defined = xcrb32.user_defined;
1936 xcrb64.request_ID = xcrb32.request_ID;
1937 xcrb64.request_control_blk_length =
1938 xcrb32.request_control_blk_length;
1939 xcrb64.request_control_blk_addr =
1940 compat_ptr(xcrb32.request_control_blk_addr);
1941 xcrb64.request_data_length =
1942 xcrb32.request_data_length;
1943 xcrb64.request_data_address =
1944 compat_ptr(xcrb32.request_data_address);
1945 xcrb64.reply_control_blk_length =
1946 xcrb32.reply_control_blk_length;
1947 xcrb64.reply_control_blk_addr =
1948 compat_ptr(xcrb32.reply_control_blk_addr);
1949 xcrb64.reply_data_length = xcrb32.reply_data_length;
1950 xcrb64.reply_data_addr =
1951 compat_ptr(xcrb32.reply_data_addr);
1952 xcrb64.priority_window = xcrb32.priority_window;
1953 xcrb64.status = xcrb32.status;
1954 do {
1955 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1956 if (rc == -EAGAIN)
1957 tr.again_counter++;
1958 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1959 /* on failure: retry once again after a requested rescan */
1960 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1961 do {
1962 rc = _zcrypt_send_cprb(true, perms, &tr, &xcrb64);
1963 if (rc == -EAGAIN)
1964 tr.again_counter++;
1965 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1966 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1967 rc = -EIO;
1968 xcrb32.reply_control_blk_length = xcrb64.reply_control_blk_length;
1969 xcrb32.reply_data_length = xcrb64.reply_data_length;
1970 xcrb32.status = xcrb64.status;
1971 if (copy_to_user(uxcrb32, &xcrb32, sizeof(xcrb32)))
1972 return -EFAULT;
1973 return rc;
1974 }
1975
zcrypt_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1976 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1977 unsigned long arg)
1978 {
1979 int rc;
1980 struct ap_perms *perms =
1981 (struct ap_perms *)filp->private_data;
1982
1983 rc = zcrypt_check_ioctl(perms, cmd);
1984 if (rc)
1985 return rc;
1986
1987 if (cmd == ICARSAMODEXPO)
1988 return trans_modexpo32(perms, filp, cmd, arg);
1989 if (cmd == ICARSACRT)
1990 return trans_modexpo_crt32(perms, filp, cmd, arg);
1991 if (cmd == ZSECSENDCPRB)
1992 return trans_xcrb32(perms, filp, cmd, arg);
1993 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1994 }
1995 #endif
1996
1997 /*
1998 * Misc device file operations.
1999 */
2000 static const struct file_operations zcrypt_fops = {
2001 .owner = THIS_MODULE,
2002 .read = zcrypt_read,
2003 .write = zcrypt_write,
2004 .unlocked_ioctl = zcrypt_unlocked_ioctl,
2005 #ifdef CONFIG_COMPAT
2006 .compat_ioctl = zcrypt_compat_ioctl,
2007 #endif
2008 .open = zcrypt_open,
2009 .release = zcrypt_release,
2010 .llseek = no_llseek,
2011 };
2012
2013 /*
2014 * Misc device.
2015 */
2016 static struct miscdevice zcrypt_misc_device = {
2017 .minor = MISC_DYNAMIC_MINOR,
2018 .name = "z90crypt",
2019 .fops = &zcrypt_fops,
2020 };
2021
2022 static int zcrypt_rng_device_count;
2023 static u32 *zcrypt_rng_buffer;
2024 static int zcrypt_rng_buffer_index;
2025 static DEFINE_MUTEX(zcrypt_rng_mutex);
2026
zcrypt_rng_data_read(struct hwrng * rng,u32 * data)2027 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
2028 {
2029 int rc;
2030
2031 /*
2032 * We don't need locking here because the RNG API guarantees serialized
2033 * read method calls.
2034 */
2035 if (zcrypt_rng_buffer_index == 0) {
2036 rc = zcrypt_rng((char *)zcrypt_rng_buffer);
2037 /* on failure: retry once again after a requested rescan */
2038 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
2039 rc = zcrypt_rng((char *)zcrypt_rng_buffer);
2040 if (rc < 0)
2041 return -EIO;
2042 zcrypt_rng_buffer_index = rc / sizeof(*data);
2043 }
2044 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
2045 return sizeof(*data);
2046 }
2047
2048 static struct hwrng zcrypt_rng_dev = {
2049 .name = "zcrypt",
2050 .data_read = zcrypt_rng_data_read,
2051 .quality = 990,
2052 };
2053
zcrypt_rng_device_add(void)2054 int zcrypt_rng_device_add(void)
2055 {
2056 int rc = 0;
2057
2058 mutex_lock(&zcrypt_rng_mutex);
2059 if (zcrypt_rng_device_count == 0) {
2060 zcrypt_rng_buffer = (u32 *)get_zeroed_page(GFP_KERNEL);
2061 if (!zcrypt_rng_buffer) {
2062 rc = -ENOMEM;
2063 goto out;
2064 }
2065 zcrypt_rng_buffer_index = 0;
2066 if (!zcrypt_hwrng_seed)
2067 zcrypt_rng_dev.quality = 0;
2068 rc = hwrng_register(&zcrypt_rng_dev);
2069 if (rc)
2070 goto out_free;
2071 zcrypt_rng_device_count = 1;
2072 } else {
2073 zcrypt_rng_device_count++;
2074 }
2075 mutex_unlock(&zcrypt_rng_mutex);
2076 return 0;
2077
2078 out_free:
2079 free_page((unsigned long)zcrypt_rng_buffer);
2080 out:
2081 mutex_unlock(&zcrypt_rng_mutex);
2082 return rc;
2083 }
2084
zcrypt_rng_device_remove(void)2085 void zcrypt_rng_device_remove(void)
2086 {
2087 mutex_lock(&zcrypt_rng_mutex);
2088 zcrypt_rng_device_count--;
2089 if (zcrypt_rng_device_count == 0) {
2090 hwrng_unregister(&zcrypt_rng_dev);
2091 free_page((unsigned long)zcrypt_rng_buffer);
2092 }
2093 mutex_unlock(&zcrypt_rng_mutex);
2094 }
2095
2096 /*
2097 * Wait until the zcrypt api is operational.
2098 * The AP bus scan and the binding of ap devices to device drivers is
2099 * an asynchronous job. This function waits until these initial jobs
2100 * are done and so the zcrypt api should be ready to serve crypto
2101 * requests - if there are resources available. The function uses an
2102 * internal timeout of 60s. The very first caller will either wait for
2103 * ap bus bindings complete or the timeout happens. This state will be
2104 * remembered for further callers which will only be blocked until a
2105 * decision is made (timeout or bindings complete).
2106 * On timeout -ETIME is returned, on success the return value is 0.
2107 */
zcrypt_wait_api_operational(void)2108 int zcrypt_wait_api_operational(void)
2109 {
2110 static DEFINE_MUTEX(zcrypt_wait_api_lock);
2111 static int zcrypt_wait_api_state;
2112 int rc;
2113
2114 rc = mutex_lock_interruptible(&zcrypt_wait_api_lock);
2115 if (rc)
2116 return rc;
2117
2118 switch (zcrypt_wait_api_state) {
2119 case 0:
2120 /* initial state, invoke wait for the ap bus complete */
2121 rc = ap_wait_init_apqn_bindings_complete(
2122 msecs_to_jiffies(60 * 1000));
2123 switch (rc) {
2124 case 0:
2125 /* ap bus bindings are complete */
2126 zcrypt_wait_api_state = 1;
2127 break;
2128 case -EINTR:
2129 /* interrupted, go back to caller */
2130 break;
2131 case -ETIME:
2132 /* timeout */
2133 ZCRYPT_DBF_WARN("%s ap_wait_init_apqn_bindings_complete()=ETIME\n",
2134 __func__);
2135 zcrypt_wait_api_state = -ETIME;
2136 break;
2137 default:
2138 /* other failure */
2139 ZCRYPT_DBF_DBG("%s ap_wait_init_apqn_bindings_complete()=%d\n",
2140 __func__, rc);
2141 break;
2142 }
2143 break;
2144 case 1:
2145 /* a previous caller already found ap bus bindings complete */
2146 rc = 0;
2147 break;
2148 default:
2149 /* a previous caller had timeout or other failure */
2150 rc = zcrypt_wait_api_state;
2151 break;
2152 }
2153
2154 mutex_unlock(&zcrypt_wait_api_lock);
2155
2156 return rc;
2157 }
2158 EXPORT_SYMBOL(zcrypt_wait_api_operational);
2159
zcrypt_debug_init(void)2160 int __init zcrypt_debug_init(void)
2161 {
2162 zcrypt_dbf_info = debug_register("zcrypt", 2, 1,
2163 DBF_MAX_SPRINTF_ARGS * sizeof(long));
2164 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
2165 debug_set_level(zcrypt_dbf_info, DBF_ERR);
2166
2167 return 0;
2168 }
2169
zcrypt_debug_exit(void)2170 void zcrypt_debug_exit(void)
2171 {
2172 debug_unregister(zcrypt_dbf_info);
2173 }
2174
2175 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2176
zcdn_init(void)2177 static int __init zcdn_init(void)
2178 {
2179 int rc;
2180
2181 /* create a new class 'zcrypt' */
2182 zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
2183 if (IS_ERR(zcrypt_class)) {
2184 rc = PTR_ERR(zcrypt_class);
2185 goto out_class_create_failed;
2186 }
2187 zcrypt_class->dev_release = zcdn_device_release;
2188
2189 /* alloc device minor range */
2190 rc = alloc_chrdev_region(&zcrypt_devt,
2191 0, ZCRYPT_MAX_MINOR_NODES,
2192 ZCRYPT_NAME);
2193 if (rc)
2194 goto out_alloc_chrdev_failed;
2195
2196 cdev_init(&zcrypt_cdev, &zcrypt_fops);
2197 zcrypt_cdev.owner = THIS_MODULE;
2198 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2199 if (rc)
2200 goto out_cdev_add_failed;
2201
2202 /* need some class specific sysfs attributes */
2203 rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
2204 if (rc)
2205 goto out_class_create_file_1_failed;
2206 rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
2207 if (rc)
2208 goto out_class_create_file_2_failed;
2209
2210 return 0;
2211
2212 out_class_create_file_2_failed:
2213 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2214 out_class_create_file_1_failed:
2215 cdev_del(&zcrypt_cdev);
2216 out_cdev_add_failed:
2217 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2218 out_alloc_chrdev_failed:
2219 class_destroy(zcrypt_class);
2220 out_class_create_failed:
2221 return rc;
2222 }
2223
zcdn_exit(void)2224 static void zcdn_exit(void)
2225 {
2226 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2227 class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
2228 zcdn_destroy_all();
2229 cdev_del(&zcrypt_cdev);
2230 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2231 class_destroy(zcrypt_class);
2232 }
2233
2234 #endif
2235
2236 /*
2237 * zcrypt_api_init(): Module initialization.
2238 *
2239 * The module initialization code.
2240 */
zcrypt_api_init(void)2241 int __init zcrypt_api_init(void)
2242 {
2243 int rc;
2244
2245 rc = zcrypt_debug_init();
2246 if (rc)
2247 goto out;
2248
2249 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2250 rc = zcdn_init();
2251 if (rc)
2252 goto out;
2253 #endif
2254
2255 /* Register the request sprayer. */
2256 rc = misc_register(&zcrypt_misc_device);
2257 if (rc < 0)
2258 goto out_misc_register_failed;
2259
2260 zcrypt_msgtype6_init();
2261 zcrypt_msgtype50_init();
2262
2263 return 0;
2264
2265 out_misc_register_failed:
2266 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2267 zcdn_exit();
2268 #endif
2269 zcrypt_debug_exit();
2270 out:
2271 return rc;
2272 }
2273
2274 /*
2275 * zcrypt_api_exit(): Module termination.
2276 *
2277 * The module termination code.
2278 */
zcrypt_api_exit(void)2279 void __exit zcrypt_api_exit(void)
2280 {
2281 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2282 zcdn_exit();
2283 #endif
2284 misc_deregister(&zcrypt_misc_device);
2285 zcrypt_msgtype6_exit();
2286 zcrypt_msgtype50_exit();
2287 zcrypt_ccamisc_exit();
2288 zcrypt_ep11misc_exit();
2289 zcrypt_debug_exit();
2290 }
2291
2292 module_init(zcrypt_api_init);
2293 module_exit(zcrypt_api_exit);
2294