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(DBF_INFO, "rescan count=%07d\n",
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
288 static struct attribute *zcdn_dev_attrs[] = {
289 &dev_attr_ioctlmask.attr,
290 &dev_attr_apmask.attr,
291 &dev_attr_aqmask.attr,
292 NULL
293 };
294
295 static struct attribute_group zcdn_dev_attr_group = {
296 .attrs = zcdn_dev_attrs
297 };
298
299 static const struct attribute_group *zcdn_dev_attr_groups[] = {
300 &zcdn_dev_attr_group,
301 NULL
302 };
303
zcdn_create_store(struct class * class,struct class_attribute * attr,const char * buf,size_t count)304 static ssize_t zcdn_create_store(struct class *class,
305 struct class_attribute *attr,
306 const char *buf, size_t count)
307 {
308 int rc;
309 char name[ZCDN_MAX_NAME];
310
311 strncpy(name, skip_spaces(buf), sizeof(name));
312 name[sizeof(name) - 1] = '\0';
313
314 rc = zcdn_create(strim(name));
315
316 return rc ? rc : count;
317 }
318
319 static const struct class_attribute class_attr_zcdn_create =
320 __ATTR(create, 0600, NULL, zcdn_create_store);
321
zcdn_destroy_store(struct class * class,struct class_attribute * attr,const char * buf,size_t count)322 static ssize_t zcdn_destroy_store(struct class *class,
323 struct class_attribute *attr,
324 const char *buf, size_t count)
325 {
326 int rc;
327 char name[ZCDN_MAX_NAME];
328
329 strncpy(name, skip_spaces(buf), sizeof(name));
330 name[sizeof(name) - 1] = '\0';
331
332 rc = zcdn_destroy(strim(name));
333
334 return rc ? rc : count;
335 }
336
337 static const struct class_attribute class_attr_zcdn_destroy =
338 __ATTR(destroy, 0600, NULL, zcdn_destroy_store);
339
zcdn_device_release(struct device * dev)340 static void zcdn_device_release(struct device *dev)
341 {
342 struct zcdn_device *zcdndev = to_zcdn_dev(dev);
343
344 ZCRYPT_DBF(DBF_INFO, "releasing zcdn device %d:%d\n",
345 MAJOR(dev->devt), MINOR(dev->devt));
346
347 kfree(zcdndev);
348 }
349
zcdn_create(const char * name)350 static int zcdn_create(const char *name)
351 {
352 dev_t devt;
353 int i, rc = 0;
354 char nodename[ZCDN_MAX_NAME];
355 struct zcdn_device *zcdndev;
356
357 if (mutex_lock_interruptible(&ap_perms_mutex))
358 return -ERESTARTSYS;
359
360 /* check if device node with this name already exists */
361 if (name[0]) {
362 zcdndev = find_zcdndev_by_name(name);
363 if (zcdndev) {
364 put_device(&zcdndev->device);
365 rc = -EEXIST;
366 goto unlockout;
367 }
368 }
369
370 /* find an unused minor number */
371 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
372 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
373 zcdndev = find_zcdndev_by_devt(devt);
374 if (zcdndev)
375 put_device(&zcdndev->device);
376 else
377 break;
378 }
379 if (i == ZCRYPT_MAX_MINOR_NODES) {
380 rc = -ENOSPC;
381 goto unlockout;
382 }
383
384 /* alloc and prepare a new zcdn device */
385 zcdndev = kzalloc(sizeof(*zcdndev), GFP_KERNEL);
386 if (!zcdndev) {
387 rc = -ENOMEM;
388 goto unlockout;
389 }
390 zcdndev->device.release = zcdn_device_release;
391 zcdndev->device.class = zcrypt_class;
392 zcdndev->device.devt = devt;
393 zcdndev->device.groups = zcdn_dev_attr_groups;
394 if (name[0])
395 strncpy(nodename, name, sizeof(nodename));
396 else
397 snprintf(nodename, sizeof(nodename),
398 ZCRYPT_NAME "_%d", (int) MINOR(devt));
399 nodename[sizeof(nodename)-1] = '\0';
400 if (dev_set_name(&zcdndev->device, nodename)) {
401 rc = -EINVAL;
402 goto unlockout;
403 }
404 rc = device_register(&zcdndev->device);
405 if (rc) {
406 put_device(&zcdndev->device);
407 goto unlockout;
408 }
409
410 ZCRYPT_DBF(DBF_INFO, "created zcdn device %d:%d\n",
411 MAJOR(devt), MINOR(devt));
412
413 unlockout:
414 mutex_unlock(&ap_perms_mutex);
415 return rc;
416 }
417
zcdn_destroy(const char * name)418 static int zcdn_destroy(const char *name)
419 {
420 int rc = 0;
421 struct zcdn_device *zcdndev;
422
423 if (mutex_lock_interruptible(&ap_perms_mutex))
424 return -ERESTARTSYS;
425
426 /* try to find this zcdn device */
427 zcdndev = find_zcdndev_by_name(name);
428 if (!zcdndev) {
429 rc = -ENOENT;
430 goto unlockout;
431 }
432
433 /*
434 * The zcdn device is not hard destroyed. It is subject to
435 * reference counting and thus just needs to be unregistered.
436 */
437 put_device(&zcdndev->device);
438 device_unregister(&zcdndev->device);
439
440 unlockout:
441 mutex_unlock(&ap_perms_mutex);
442 return rc;
443 }
444
zcdn_destroy_all(void)445 static void zcdn_destroy_all(void)
446 {
447 int i;
448 dev_t devt;
449 struct zcdn_device *zcdndev;
450
451 mutex_lock(&ap_perms_mutex);
452 for (i = 0; i < ZCRYPT_MAX_MINOR_NODES; i++) {
453 devt = MKDEV(MAJOR(zcrypt_devt), MINOR(zcrypt_devt) + i);
454 zcdndev = find_zcdndev_by_devt(devt);
455 if (zcdndev) {
456 put_device(&zcdndev->device);
457 device_unregister(&zcdndev->device);
458 }
459 }
460 mutex_unlock(&ap_perms_mutex);
461 }
462
463 #endif
464
465 /*
466 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
467 *
468 * This function is not supported beyond zcrypt 1.3.1.
469 */
zcrypt_read(struct file * filp,char __user * buf,size_t count,loff_t * f_pos)470 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
471 size_t count, loff_t *f_pos)
472 {
473 return -EPERM;
474 }
475
476 /*
477 * zcrypt_write(): Not allowed.
478 *
479 * Write is is not allowed
480 */
zcrypt_write(struct file * filp,const char __user * buf,size_t count,loff_t * f_pos)481 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
482 size_t count, loff_t *f_pos)
483 {
484 return -EPERM;
485 }
486
487 /*
488 * zcrypt_open(): Count number of users.
489 *
490 * Device open function to count number of users.
491 */
zcrypt_open(struct inode * inode,struct file * filp)492 static int zcrypt_open(struct inode *inode, struct file *filp)
493 {
494 struct ap_perms *perms = &ap_perms;
495
496 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
497 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
498 struct zcdn_device *zcdndev;
499
500 if (mutex_lock_interruptible(&ap_perms_mutex))
501 return -ERESTARTSYS;
502 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
503 /* find returns a reference, no get_device() needed */
504 mutex_unlock(&ap_perms_mutex);
505 if (zcdndev)
506 perms = &zcdndev->perms;
507 }
508 #endif
509 filp->private_data = (void *) perms;
510
511 atomic_inc(&zcrypt_open_count);
512 return stream_open(inode, filp);
513 }
514
515 /*
516 * zcrypt_release(): Count number of users.
517 *
518 * Device close function to count number of users.
519 */
zcrypt_release(struct inode * inode,struct file * filp)520 static int zcrypt_release(struct inode *inode, struct file *filp)
521 {
522 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
523 if (filp->f_inode->i_cdev == &zcrypt_cdev) {
524 struct zcdn_device *zcdndev;
525
526 mutex_lock(&ap_perms_mutex);
527 zcdndev = find_zcdndev_by_devt(filp->f_inode->i_rdev);
528 mutex_unlock(&ap_perms_mutex);
529 if (zcdndev) {
530 /* 2 puts here: one for find, one for open */
531 put_device(&zcdndev->device);
532 put_device(&zcdndev->device);
533 }
534 }
535 #endif
536
537 atomic_dec(&zcrypt_open_count);
538 return 0;
539 }
540
zcrypt_check_ioctl(struct ap_perms * perms,unsigned int cmd)541 static inline int zcrypt_check_ioctl(struct ap_perms *perms,
542 unsigned int cmd)
543 {
544 int rc = -EPERM;
545 int ioctlnr = (cmd & _IOC_NRMASK) >> _IOC_NRSHIFT;
546
547 if (ioctlnr > 0 && ioctlnr < AP_IOCTLS) {
548 if (test_bit_inv(ioctlnr, perms->ioctlm))
549 rc = 0;
550 }
551
552 if (rc)
553 ZCRYPT_DBF(DBF_WARN,
554 "ioctl check failed: ioctlnr=0x%04x rc=%d\n",
555 ioctlnr, rc);
556
557 return rc;
558 }
559
zcrypt_check_card(struct ap_perms * perms,int card)560 static inline bool zcrypt_check_card(struct ap_perms *perms, int card)
561 {
562 return test_bit_inv(card, perms->apm) ? true : false;
563 }
564
zcrypt_check_queue(struct ap_perms * perms,int queue)565 static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
566 {
567 return test_bit_inv(queue, perms->aqm) ? true : false;
568 }
569
zcrypt_pick_queue(struct zcrypt_card * zc,struct zcrypt_queue * zq,struct module ** pmod,unsigned int weight)570 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
571 struct zcrypt_queue *zq,
572 struct module **pmod,
573 unsigned int weight)
574 {
575 if (!zq || !try_module_get(zq->queue->ap_dev.device.driver->owner))
576 return NULL;
577 zcrypt_queue_get(zq);
578 get_device(&zq->queue->ap_dev.device);
579 atomic_add(weight, &zc->load);
580 atomic_add(weight, &zq->load);
581 zq->request_count++;
582 *pmod = zq->queue->ap_dev.device.driver->owner;
583 return zq;
584 }
585
zcrypt_drop_queue(struct zcrypt_card * zc,struct zcrypt_queue * zq,struct module * mod,unsigned int weight)586 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
587 struct zcrypt_queue *zq,
588 struct module *mod,
589 unsigned int weight)
590 {
591 zq->request_count--;
592 atomic_sub(weight, &zc->load);
593 atomic_sub(weight, &zq->load);
594 put_device(&zq->queue->ap_dev.device);
595 zcrypt_queue_put(zq);
596 module_put(mod);
597 }
598
zcrypt_card_compare(struct zcrypt_card * zc,struct zcrypt_card * pref_zc,unsigned int weight,unsigned int pref_weight)599 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
600 struct zcrypt_card *pref_zc,
601 unsigned int weight,
602 unsigned int pref_weight)
603 {
604 if (!pref_zc)
605 return true;
606 weight += atomic_read(&zc->load);
607 pref_weight += atomic_read(&pref_zc->load);
608 if (weight == pref_weight)
609 return atomic64_read(&zc->card->total_request_count) <
610 atomic64_read(&pref_zc->card->total_request_count);
611 return weight < pref_weight;
612 }
613
zcrypt_queue_compare(struct zcrypt_queue * zq,struct zcrypt_queue * pref_zq,unsigned int weight,unsigned int pref_weight)614 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
615 struct zcrypt_queue *pref_zq,
616 unsigned int weight,
617 unsigned int pref_weight)
618 {
619 if (!pref_zq)
620 return true;
621 weight += atomic_read(&zq->load);
622 pref_weight += atomic_read(&pref_zq->load);
623 if (weight == pref_weight)
624 return zq->queue->total_request_count <
625 pref_zq->queue->total_request_count;
626 return weight < pref_weight;
627 }
628
629 /*
630 * zcrypt ioctls.
631 */
zcrypt_rsa_modexpo(struct ap_perms * perms,struct zcrypt_track * tr,struct ica_rsa_modexpo * mex)632 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
633 struct zcrypt_track *tr,
634 struct ica_rsa_modexpo *mex)
635 {
636 struct zcrypt_card *zc, *pref_zc;
637 struct zcrypt_queue *zq, *pref_zq;
638 struct ap_message ap_msg;
639 unsigned int wgt = 0, pref_wgt = 0;
640 unsigned int func_code;
641 int cpen, qpen, qid = 0, rc = -ENODEV;
642 struct module *mod;
643
644 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
645
646 ap_init_message(&ap_msg);
647
648 #ifdef CONFIG_ZCRYPT_DEBUG
649 if (tr && tr->fi.cmd)
650 ap_msg.fi.cmd = tr->fi.cmd;
651 #endif
652
653 if (mex->outputdatalength < mex->inputdatalength) {
654 func_code = 0;
655 rc = -EINVAL;
656 goto out;
657 }
658
659 /*
660 * As long as outputdatalength is big enough, we can set the
661 * outputdatalength equal to the inputdatalength, since that is the
662 * number of bytes we will copy in any case
663 */
664 mex->outputdatalength = mex->inputdatalength;
665
666 rc = get_rsa_modex_fc(mex, &func_code);
667 if (rc)
668 goto out;
669
670 pref_zc = NULL;
671 pref_zq = NULL;
672 spin_lock(&zcrypt_list_lock);
673 for_each_zcrypt_card(zc) {
674 /* Check for useable accelarator or CCA card */
675 if (!zc->online || !zc->card->config ||
676 !(zc->card->functions & 0x18000000))
677 continue;
678 /* Check for size limits */
679 if (zc->min_mod_size > mex->inputdatalength ||
680 zc->max_mod_size < mex->inputdatalength)
681 continue;
682 /* check if device node has admission for this card */
683 if (!zcrypt_check_card(perms, zc->card->id))
684 continue;
685 /* get weight index of the card device */
686 wgt = zc->speed_rating[func_code];
687 /* penalty if this msg was previously sent via this card */
688 cpen = (tr && tr->again_counter && tr->last_qid &&
689 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
690 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
691 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
692 continue;
693 for_each_zcrypt_queue(zq, zc) {
694 /* check if device is useable and eligible */
695 if (!zq->online || !zq->ops->rsa_modexpo ||
696 !zq->queue->config)
697 continue;
698 /* check if device node has admission for this queue */
699 if (!zcrypt_check_queue(perms,
700 AP_QID_QUEUE(zq->queue->qid)))
701 continue;
702 /* penalty if the msg was previously sent at this qid */
703 qpen = (tr && tr->again_counter && tr->last_qid &&
704 tr->last_qid == zq->queue->qid) ?
705 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
706 if (!zcrypt_queue_compare(zq, pref_zq,
707 wgt + cpen + qpen, pref_wgt))
708 continue;
709 pref_zc = zc;
710 pref_zq = zq;
711 pref_wgt = wgt + cpen + qpen;
712 }
713 }
714 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
715 spin_unlock(&zcrypt_list_lock);
716
717 if (!pref_zq) {
718 rc = -ENODEV;
719 goto out;
720 }
721
722 qid = pref_zq->queue->qid;
723 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex, &ap_msg);
724
725 spin_lock(&zcrypt_list_lock);
726 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
727 spin_unlock(&zcrypt_list_lock);
728
729 out:
730 ap_release_message(&ap_msg);
731 if (tr) {
732 tr->last_rc = rc;
733 tr->last_qid = qid;
734 }
735 trace_s390_zcrypt_rep(mex, func_code, rc,
736 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
737 return rc;
738 }
739
zcrypt_rsa_crt(struct ap_perms * perms,struct zcrypt_track * tr,struct ica_rsa_modexpo_crt * crt)740 static long zcrypt_rsa_crt(struct ap_perms *perms,
741 struct zcrypt_track *tr,
742 struct ica_rsa_modexpo_crt *crt)
743 {
744 struct zcrypt_card *zc, *pref_zc;
745 struct zcrypt_queue *zq, *pref_zq;
746 struct ap_message ap_msg;
747 unsigned int wgt = 0, pref_wgt = 0;
748 unsigned int func_code;
749 int cpen, qpen, qid = 0, rc = -ENODEV;
750 struct module *mod;
751
752 trace_s390_zcrypt_req(crt, TP_ICARSACRT);
753
754 ap_init_message(&ap_msg);
755
756 #ifdef CONFIG_ZCRYPT_DEBUG
757 if (tr && tr->fi.cmd)
758 ap_msg.fi.cmd = tr->fi.cmd;
759 #endif
760
761 if (crt->outputdatalength < crt->inputdatalength) {
762 func_code = 0;
763 rc = -EINVAL;
764 goto out;
765 }
766
767 /*
768 * As long as outputdatalength is big enough, we can set the
769 * outputdatalength equal to the inputdatalength, since that is the
770 * number of bytes we will copy in any case
771 */
772 crt->outputdatalength = crt->inputdatalength;
773
774 rc = get_rsa_crt_fc(crt, &func_code);
775 if (rc)
776 goto out;
777
778 pref_zc = NULL;
779 pref_zq = NULL;
780 spin_lock(&zcrypt_list_lock);
781 for_each_zcrypt_card(zc) {
782 /* Check for useable accelarator or CCA card */
783 if (!zc->online || !zc->card->config ||
784 !(zc->card->functions & 0x18000000))
785 continue;
786 /* Check for size limits */
787 if (zc->min_mod_size > crt->inputdatalength ||
788 zc->max_mod_size < crt->inputdatalength)
789 continue;
790 /* check if device node has admission for this card */
791 if (!zcrypt_check_card(perms, zc->card->id))
792 continue;
793 /* get weight index of the card device */
794 wgt = zc->speed_rating[func_code];
795 /* penalty if this msg was previously sent via this card */
796 cpen = (tr && tr->again_counter && tr->last_qid &&
797 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
798 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
799 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
800 continue;
801 for_each_zcrypt_queue(zq, zc) {
802 /* check if device is useable and eligible */
803 if (!zq->online || !zq->ops->rsa_modexpo_crt ||
804 !zq->queue->config)
805 continue;
806 /* check if device node has admission for this queue */
807 if (!zcrypt_check_queue(perms,
808 AP_QID_QUEUE(zq->queue->qid)))
809 continue;
810 /* penalty if the msg was previously sent at this qid */
811 qpen = (tr && tr->again_counter && tr->last_qid &&
812 tr->last_qid == zq->queue->qid) ?
813 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
814 if (!zcrypt_queue_compare(zq, pref_zq,
815 wgt + cpen + qpen, pref_wgt))
816 continue;
817 pref_zc = zc;
818 pref_zq = zq;
819 pref_wgt = wgt + cpen + qpen;
820 }
821 }
822 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
823 spin_unlock(&zcrypt_list_lock);
824
825 if (!pref_zq) {
826 rc = -ENODEV;
827 goto out;
828 }
829
830 qid = pref_zq->queue->qid;
831 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt, &ap_msg);
832
833 spin_lock(&zcrypt_list_lock);
834 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
835 spin_unlock(&zcrypt_list_lock);
836
837 out:
838 ap_release_message(&ap_msg);
839 if (tr) {
840 tr->last_rc = rc;
841 tr->last_qid = qid;
842 }
843 trace_s390_zcrypt_rep(crt, func_code, rc,
844 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
845 return rc;
846 }
847
_zcrypt_send_cprb(bool userspace,struct ap_perms * perms,struct zcrypt_track * tr,struct ica_xcRB * xcRB)848 static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
849 struct zcrypt_track *tr,
850 struct ica_xcRB *xcRB)
851 {
852 struct zcrypt_card *zc, *pref_zc;
853 struct zcrypt_queue *zq, *pref_zq;
854 struct ap_message ap_msg;
855 unsigned int wgt = 0, pref_wgt = 0;
856 unsigned int func_code;
857 unsigned short *domain, tdom;
858 int cpen, qpen, qid = 0, rc = -ENODEV;
859 struct module *mod;
860
861 trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
862
863 xcRB->status = 0;
864 ap_init_message(&ap_msg);
865
866 #ifdef CONFIG_ZCRYPT_DEBUG
867 if (tr && tr->fi.cmd)
868 ap_msg.fi.cmd = tr->fi.cmd;
869 if (tr && tr->fi.action == AP_FI_ACTION_CCA_AGENT_FF) {
870 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid agent_ID 'FF'\n",
871 __func__, tr->fi.cmd);
872 xcRB->agent_ID = 0x4646;
873 }
874 #endif
875
876 rc = get_cprb_fc(userspace, xcRB, &ap_msg, &func_code, &domain);
877 if (rc)
878 goto out;
879
880 /*
881 * If a valid target domain is set and this domain is NOT a usage
882 * domain but a control only domain, use the default domain as target.
883 */
884 tdom = *domain;
885 if (tdom < AP_DOMAINS &&
886 !ap_test_config_usage_domain(tdom) &&
887 ap_test_config_ctrl_domain(tdom) &&
888 ap_domain_index >= 0)
889 tdom = ap_domain_index;
890
891 pref_zc = NULL;
892 pref_zq = NULL;
893 spin_lock(&zcrypt_list_lock);
894 for_each_zcrypt_card(zc) {
895 /* Check for useable CCA card */
896 if (!zc->online || !zc->card->config ||
897 !(zc->card->functions & 0x10000000))
898 continue;
899 /* Check for user selected CCA card */
900 if (xcRB->user_defined != AUTOSELECT &&
901 xcRB->user_defined != zc->card->id)
902 continue;
903 /* check if request size exceeds card max msg size */
904 if (ap_msg.len > zc->card->maxmsgsize)
905 continue;
906 /* check if device node has admission for this card */
907 if (!zcrypt_check_card(perms, zc->card->id))
908 continue;
909 /* get weight index of the card device */
910 wgt = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
911 /* penalty if this msg was previously sent via this card */
912 cpen = (tr && tr->again_counter && tr->last_qid &&
913 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
914 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
915 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
916 continue;
917 for_each_zcrypt_queue(zq, zc) {
918 /* check for device useable and eligible */
919 if (!zq->online ||
920 !zq->ops->send_cprb ||
921 !zq->queue->config ||
922 (tdom != AUTOSEL_DOM &&
923 tdom != AP_QID_QUEUE(zq->queue->qid)))
924 continue;
925 /* check if device node has admission for this queue */
926 if (!zcrypt_check_queue(perms,
927 AP_QID_QUEUE(zq->queue->qid)))
928 continue;
929 /* penalty if the msg was previously sent at this qid */
930 qpen = (tr && tr->again_counter && tr->last_qid &&
931 tr->last_qid == zq->queue->qid) ?
932 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
933 if (!zcrypt_queue_compare(zq, pref_zq,
934 wgt + cpen + qpen, pref_wgt))
935 continue;
936 pref_zc = zc;
937 pref_zq = zq;
938 pref_wgt = wgt + cpen + qpen;
939 }
940 }
941 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
942 spin_unlock(&zcrypt_list_lock);
943
944 if (!pref_zq) {
945 rc = -ENODEV;
946 goto out;
947 }
948
949 /* in case of auto select, provide the correct domain */
950 qid = pref_zq->queue->qid;
951 if (*domain == AUTOSEL_DOM)
952 *domain = AP_QID_QUEUE(qid);
953
954 #ifdef CONFIG_ZCRYPT_DEBUG
955 if (tr && tr->fi.action == AP_FI_ACTION_CCA_DOM_INVAL) {
956 ZCRYPT_DBF_WARN("%s fi cmd 0x%04x: forcing invalid domain\n",
957 __func__, tr->fi.cmd);
958 *domain = 99;
959 }
960 #endif
961
962 rc = pref_zq->ops->send_cprb(userspace, pref_zq, xcRB, &ap_msg);
963
964 spin_lock(&zcrypt_list_lock);
965 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
966 spin_unlock(&zcrypt_list_lock);
967
968 out:
969 ap_release_message(&ap_msg);
970 if (tr) {
971 tr->last_rc = rc;
972 tr->last_qid = qid;
973 }
974 trace_s390_zcrypt_rep(xcRB, func_code, rc,
975 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
976 return rc;
977 }
978
zcrypt_send_cprb(struct ica_xcRB * xcRB)979 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
980 {
981 return _zcrypt_send_cprb(false, &ap_perms, NULL, xcRB);
982 }
983 EXPORT_SYMBOL(zcrypt_send_cprb);
984
is_desired_ep11_card(unsigned int dev_id,unsigned short target_num,struct ep11_target_dev * targets)985 static bool is_desired_ep11_card(unsigned int dev_id,
986 unsigned short target_num,
987 struct ep11_target_dev *targets)
988 {
989 while (target_num-- > 0) {
990 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
991 return true;
992 targets++;
993 }
994 return false;
995 }
996
is_desired_ep11_queue(unsigned int dev_qid,unsigned short target_num,struct ep11_target_dev * targets)997 static bool is_desired_ep11_queue(unsigned int dev_qid,
998 unsigned short target_num,
999 struct ep11_target_dev *targets)
1000 {
1001 int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
1002
1003 while (target_num-- > 0) {
1004 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
1005 (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
1006 return true;
1007 targets++;
1008 }
1009 return false;
1010 }
1011
_zcrypt_send_ep11_cprb(bool userspace,struct ap_perms * perms,struct zcrypt_track * tr,struct ep11_urb * xcrb)1012 static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
1013 struct zcrypt_track *tr,
1014 struct ep11_urb *xcrb)
1015 {
1016 struct zcrypt_card *zc, *pref_zc;
1017 struct zcrypt_queue *zq, *pref_zq;
1018 struct ep11_target_dev *targets;
1019 unsigned short target_num;
1020 unsigned int wgt = 0, pref_wgt = 0;
1021 unsigned int func_code;
1022 struct ap_message ap_msg;
1023 int cpen, qpen, qid = 0, rc = -ENODEV;
1024 struct module *mod;
1025
1026 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
1027
1028 ap_init_message(&ap_msg);
1029
1030 #ifdef CONFIG_ZCRYPT_DEBUG
1031 if (tr && tr->fi.cmd)
1032 ap_msg.fi.cmd = tr->fi.cmd;
1033 #endif
1034
1035 target_num = (unsigned short) xcrb->targets_num;
1036
1037 /* empty list indicates autoselect (all available targets) */
1038 targets = NULL;
1039 if (target_num != 0) {
1040 struct ep11_target_dev __user *uptr;
1041
1042 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
1043 if (!targets) {
1044 func_code = 0;
1045 rc = -ENOMEM;
1046 goto out;
1047 }
1048
1049 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
1050 if (z_copy_from_user(userspace, targets, uptr,
1051 target_num * sizeof(*targets))) {
1052 func_code = 0;
1053 rc = -EFAULT;
1054 goto out_free;
1055 }
1056 }
1057
1058 rc = get_ep11cprb_fc(userspace, xcrb, &ap_msg, &func_code);
1059 if (rc)
1060 goto out_free;
1061
1062 pref_zc = NULL;
1063 pref_zq = NULL;
1064 spin_lock(&zcrypt_list_lock);
1065 for_each_zcrypt_card(zc) {
1066 /* Check for useable EP11 card */
1067 if (!zc->online || !zc->card->config ||
1068 !(zc->card->functions & 0x04000000))
1069 continue;
1070 /* Check for user selected EP11 card */
1071 if (targets &&
1072 !is_desired_ep11_card(zc->card->id, target_num, targets))
1073 continue;
1074 /* check if request size exceeds card max msg size */
1075 if (ap_msg.len > zc->card->maxmsgsize)
1076 continue;
1077 /* check if device node has admission for this card */
1078 if (!zcrypt_check_card(perms, zc->card->id))
1079 continue;
1080 /* get weight index of the card device */
1081 wgt = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
1082 /* penalty if this msg was previously sent via this card */
1083 cpen = (tr && tr->again_counter && tr->last_qid &&
1084 AP_QID_CARD(tr->last_qid) == zc->card->id) ?
1085 TRACK_AGAIN_CARD_WEIGHT_PENALTY : 0;
1086 if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
1087 continue;
1088 for_each_zcrypt_queue(zq, zc) {
1089 /* check if device is useable and eligible */
1090 if (!zq->online ||
1091 !zq->ops->send_ep11_cprb ||
1092 !zq->queue->config ||
1093 (targets &&
1094 !is_desired_ep11_queue(zq->queue->qid,
1095 target_num, targets)))
1096 continue;
1097 /* check if device node has admission for this queue */
1098 if (!zcrypt_check_queue(perms,
1099 AP_QID_QUEUE(zq->queue->qid)))
1100 continue;
1101 /* penalty if the msg was previously sent at this qid */
1102 qpen = (tr && tr->again_counter && tr->last_qid &&
1103 tr->last_qid == zq->queue->qid) ?
1104 TRACK_AGAIN_QUEUE_WEIGHT_PENALTY : 0;
1105 if (!zcrypt_queue_compare(zq, pref_zq,
1106 wgt + cpen + qpen, pref_wgt))
1107 continue;
1108 pref_zc = zc;
1109 pref_zq = zq;
1110 pref_wgt = wgt + cpen + qpen;
1111 }
1112 }
1113 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1114 spin_unlock(&zcrypt_list_lock);
1115
1116 if (!pref_zq) {
1117 rc = -ENODEV;
1118 goto out_free;
1119 }
1120
1121 qid = pref_zq->queue->qid;
1122 rc = pref_zq->ops->send_ep11_cprb(userspace, pref_zq, xcrb, &ap_msg);
1123
1124 spin_lock(&zcrypt_list_lock);
1125 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1126 spin_unlock(&zcrypt_list_lock);
1127
1128 out_free:
1129 kfree(targets);
1130 out:
1131 ap_release_message(&ap_msg);
1132 if (tr) {
1133 tr->last_rc = rc;
1134 tr->last_qid = qid;
1135 }
1136 trace_s390_zcrypt_rep(xcrb, func_code, rc,
1137 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1138 return rc;
1139 }
1140
zcrypt_send_ep11_cprb(struct ep11_urb * xcrb)1141 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1142 {
1143 return _zcrypt_send_ep11_cprb(false, &ap_perms, NULL, xcrb);
1144 }
1145 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1146
zcrypt_rng(char * buffer)1147 static long zcrypt_rng(char *buffer)
1148 {
1149 struct zcrypt_card *zc, *pref_zc;
1150 struct zcrypt_queue *zq, *pref_zq;
1151 unsigned int wgt = 0, pref_wgt = 0;
1152 unsigned int func_code;
1153 struct ap_message ap_msg;
1154 unsigned int domain;
1155 int qid = 0, rc = -ENODEV;
1156 struct module *mod;
1157
1158 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1159
1160 ap_init_message(&ap_msg);
1161 rc = get_rng_fc(&ap_msg, &func_code, &domain);
1162 if (rc)
1163 goto out;
1164
1165 pref_zc = NULL;
1166 pref_zq = NULL;
1167 spin_lock(&zcrypt_list_lock);
1168 for_each_zcrypt_card(zc) {
1169 /* Check for useable CCA card */
1170 if (!zc->online || !zc->card->config ||
1171 !(zc->card->functions & 0x10000000))
1172 continue;
1173 /* get weight index of the card device */
1174 wgt = zc->speed_rating[func_code];
1175 if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
1176 continue;
1177 for_each_zcrypt_queue(zq, zc) {
1178 /* check if device is useable and eligible */
1179 if (!zq->online || !zq->ops->rng ||
1180 !zq->queue->config)
1181 continue;
1182 if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
1183 continue;
1184 pref_zc = zc;
1185 pref_zq = zq;
1186 pref_wgt = wgt;
1187 }
1188 }
1189 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, wgt);
1190 spin_unlock(&zcrypt_list_lock);
1191
1192 if (!pref_zq) {
1193 rc = -ENODEV;
1194 goto out;
1195 }
1196
1197 qid = pref_zq->queue->qid;
1198 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1199
1200 spin_lock(&zcrypt_list_lock);
1201 zcrypt_drop_queue(pref_zc, pref_zq, mod, wgt);
1202 spin_unlock(&zcrypt_list_lock);
1203
1204 out:
1205 ap_release_message(&ap_msg);
1206 trace_s390_zcrypt_rep(buffer, func_code, rc,
1207 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1208 return rc;
1209 }
1210
zcrypt_device_status_mask(struct zcrypt_device_status * devstatus)1211 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1212 {
1213 struct zcrypt_card *zc;
1214 struct zcrypt_queue *zq;
1215 struct zcrypt_device_status *stat;
1216 int card, queue;
1217
1218 memset(devstatus, 0, MAX_ZDEV_ENTRIES
1219 * sizeof(struct zcrypt_device_status));
1220
1221 spin_lock(&zcrypt_list_lock);
1222 for_each_zcrypt_card(zc) {
1223 for_each_zcrypt_queue(zq, zc) {
1224 card = AP_QID_CARD(zq->queue->qid);
1225 if (card >= MAX_ZDEV_CARDIDS)
1226 continue;
1227 queue = AP_QID_QUEUE(zq->queue->qid);
1228 stat = &devstatus[card * AP_DOMAINS + queue];
1229 stat->hwtype = zc->card->ap_dev.device_type;
1230 stat->functions = zc->card->functions >> 26;
1231 stat->qid = zq->queue->qid;
1232 stat->online = zq->online ? 0x01 : 0x00;
1233 }
1234 }
1235 spin_unlock(&zcrypt_list_lock);
1236 }
1237
zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext * devstatus)1238 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1239 {
1240 struct zcrypt_card *zc;
1241 struct zcrypt_queue *zq;
1242 struct zcrypt_device_status_ext *stat;
1243 int card, queue;
1244
1245 memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1246 * sizeof(struct zcrypt_device_status_ext));
1247
1248 spin_lock(&zcrypt_list_lock);
1249 for_each_zcrypt_card(zc) {
1250 for_each_zcrypt_queue(zq, zc) {
1251 card = AP_QID_CARD(zq->queue->qid);
1252 queue = AP_QID_QUEUE(zq->queue->qid);
1253 stat = &devstatus[card * AP_DOMAINS + queue];
1254 stat->hwtype = zc->card->ap_dev.device_type;
1255 stat->functions = zc->card->functions >> 26;
1256 stat->qid = zq->queue->qid;
1257 stat->online = zq->online ? 0x01 : 0x00;
1258 }
1259 }
1260 spin_unlock(&zcrypt_list_lock);
1261 }
1262 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1263
zcrypt_device_status_ext(int card,int queue,struct zcrypt_device_status_ext * devstat)1264 int zcrypt_device_status_ext(int card, int queue,
1265 struct zcrypt_device_status_ext *devstat)
1266 {
1267 struct zcrypt_card *zc;
1268 struct zcrypt_queue *zq;
1269
1270 memset(devstat, 0, sizeof(*devstat));
1271
1272 spin_lock(&zcrypt_list_lock);
1273 for_each_zcrypt_card(zc) {
1274 for_each_zcrypt_queue(zq, zc) {
1275 if (card == AP_QID_CARD(zq->queue->qid) &&
1276 queue == AP_QID_QUEUE(zq->queue->qid)) {
1277 devstat->hwtype = zc->card->ap_dev.device_type;
1278 devstat->functions = zc->card->functions >> 26;
1279 devstat->qid = zq->queue->qid;
1280 devstat->online = zq->online ? 0x01 : 0x00;
1281 spin_unlock(&zcrypt_list_lock);
1282 return 0;
1283 }
1284 }
1285 }
1286 spin_unlock(&zcrypt_list_lock);
1287
1288 return -ENODEV;
1289 }
1290 EXPORT_SYMBOL(zcrypt_device_status_ext);
1291
zcrypt_status_mask(char status[],size_t max_adapters)1292 static void zcrypt_status_mask(char status[], size_t max_adapters)
1293 {
1294 struct zcrypt_card *zc;
1295 struct zcrypt_queue *zq;
1296 int card;
1297
1298 memset(status, 0, max_adapters);
1299 spin_lock(&zcrypt_list_lock);
1300 for_each_zcrypt_card(zc) {
1301 for_each_zcrypt_queue(zq, zc) {
1302 card = AP_QID_CARD(zq->queue->qid);
1303 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1304 || card >= max_adapters)
1305 continue;
1306 status[card] = zc->online ? zc->user_space_type : 0x0d;
1307 }
1308 }
1309 spin_unlock(&zcrypt_list_lock);
1310 }
1311
zcrypt_qdepth_mask(char qdepth[],size_t max_adapters)1312 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1313 {
1314 struct zcrypt_card *zc;
1315 struct zcrypt_queue *zq;
1316 int card;
1317
1318 memset(qdepth, 0, max_adapters);
1319 spin_lock(&zcrypt_list_lock);
1320 local_bh_disable();
1321 for_each_zcrypt_card(zc) {
1322 for_each_zcrypt_queue(zq, zc) {
1323 card = AP_QID_CARD(zq->queue->qid);
1324 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1325 || card >= max_adapters)
1326 continue;
1327 spin_lock(&zq->queue->lock);
1328 qdepth[card] =
1329 zq->queue->pendingq_count +
1330 zq->queue->requestq_count;
1331 spin_unlock(&zq->queue->lock);
1332 }
1333 }
1334 local_bh_enable();
1335 spin_unlock(&zcrypt_list_lock);
1336 }
1337
zcrypt_perdev_reqcnt(u32 reqcnt[],size_t max_adapters)1338 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1339 {
1340 struct zcrypt_card *zc;
1341 struct zcrypt_queue *zq;
1342 int card;
1343 u64 cnt;
1344
1345 memset(reqcnt, 0, sizeof(int) * max_adapters);
1346 spin_lock(&zcrypt_list_lock);
1347 local_bh_disable();
1348 for_each_zcrypt_card(zc) {
1349 for_each_zcrypt_queue(zq, zc) {
1350 card = AP_QID_CARD(zq->queue->qid);
1351 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1352 || card >= max_adapters)
1353 continue;
1354 spin_lock(&zq->queue->lock);
1355 cnt = zq->queue->total_request_count;
1356 spin_unlock(&zq->queue->lock);
1357 reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX;
1358 }
1359 }
1360 local_bh_enable();
1361 spin_unlock(&zcrypt_list_lock);
1362 }
1363
zcrypt_pendingq_count(void)1364 static int zcrypt_pendingq_count(void)
1365 {
1366 struct zcrypt_card *zc;
1367 struct zcrypt_queue *zq;
1368 int pendingq_count;
1369
1370 pendingq_count = 0;
1371 spin_lock(&zcrypt_list_lock);
1372 local_bh_disable();
1373 for_each_zcrypt_card(zc) {
1374 for_each_zcrypt_queue(zq, zc) {
1375 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1376 continue;
1377 spin_lock(&zq->queue->lock);
1378 pendingq_count += zq->queue->pendingq_count;
1379 spin_unlock(&zq->queue->lock);
1380 }
1381 }
1382 local_bh_enable();
1383 spin_unlock(&zcrypt_list_lock);
1384 return pendingq_count;
1385 }
1386
zcrypt_requestq_count(void)1387 static int zcrypt_requestq_count(void)
1388 {
1389 struct zcrypt_card *zc;
1390 struct zcrypt_queue *zq;
1391 int requestq_count;
1392
1393 requestq_count = 0;
1394 spin_lock(&zcrypt_list_lock);
1395 local_bh_disable();
1396 for_each_zcrypt_card(zc) {
1397 for_each_zcrypt_queue(zq, zc) {
1398 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1399 continue;
1400 spin_lock(&zq->queue->lock);
1401 requestq_count += zq->queue->requestq_count;
1402 spin_unlock(&zq->queue->lock);
1403 }
1404 }
1405 local_bh_enable();
1406 spin_unlock(&zcrypt_list_lock);
1407 return requestq_count;
1408 }
1409
icarsamodexpo_ioctl(struct ap_perms * perms,unsigned long arg)1410 static int icarsamodexpo_ioctl(struct ap_perms *perms, unsigned long arg)
1411 {
1412 int rc;
1413 struct zcrypt_track tr;
1414 struct ica_rsa_modexpo mex;
1415 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1416
1417 memset(&tr, 0, sizeof(tr));
1418 if (copy_from_user(&mex, umex, sizeof(mex)))
1419 return -EFAULT;
1420
1421 #ifdef CONFIG_ZCRYPT_DEBUG
1422 if (mex.inputdatalength & (1U << 31)) {
1423 if (!capable(CAP_SYS_ADMIN))
1424 return -EPERM;
1425 tr.fi.cmd = (u16)(mex.inputdatalength >> 16);
1426 }
1427 mex.inputdatalength &= 0x0000FFFF;
1428 #endif
1429
1430 do {
1431 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1432 if (rc == -EAGAIN)
1433 tr.again_counter++;
1434 #ifdef CONFIG_ZCRYPT_DEBUG
1435 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1436 break;
1437 #endif
1438 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1439 /* on failure: retry once again after a requested rescan */
1440 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1441 do {
1442 rc = zcrypt_rsa_modexpo(perms, &tr, &mex);
1443 if (rc == -EAGAIN)
1444 tr.again_counter++;
1445 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1446 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1447 rc = -EIO;
1448 if (rc) {
1449 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1450 return rc;
1451 }
1452 return put_user(mex.outputdatalength, &umex->outputdatalength);
1453 }
1454
icarsacrt_ioctl(struct ap_perms * perms,unsigned long arg)1455 static int icarsacrt_ioctl(struct ap_perms *perms, unsigned long arg)
1456 {
1457 int rc;
1458 struct zcrypt_track tr;
1459 struct ica_rsa_modexpo_crt crt;
1460 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1461
1462 memset(&tr, 0, sizeof(tr));
1463 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1464 return -EFAULT;
1465
1466 #ifdef CONFIG_ZCRYPT_DEBUG
1467 if (crt.inputdatalength & (1U << 31)) {
1468 if (!capable(CAP_SYS_ADMIN))
1469 return -EPERM;
1470 tr.fi.cmd = (u16)(crt.inputdatalength >> 16);
1471 }
1472 crt.inputdatalength &= 0x0000FFFF;
1473 #endif
1474
1475 do {
1476 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1477 if (rc == -EAGAIN)
1478 tr.again_counter++;
1479 #ifdef CONFIG_ZCRYPT_DEBUG
1480 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1481 break;
1482 #endif
1483 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1484 /* on failure: retry once again after a requested rescan */
1485 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1486 do {
1487 rc = zcrypt_rsa_crt(perms, &tr, &crt);
1488 if (rc == -EAGAIN)
1489 tr.again_counter++;
1490 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1491 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1492 rc = -EIO;
1493 if (rc) {
1494 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1495 return rc;
1496 }
1497 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1498 }
1499
zsecsendcprb_ioctl(struct ap_perms * perms,unsigned long arg)1500 static int zsecsendcprb_ioctl(struct ap_perms *perms, unsigned long arg)
1501 {
1502 int rc;
1503 struct ica_xcRB xcRB;
1504 struct zcrypt_track tr;
1505 struct ica_xcRB __user *uxcRB = (void __user *) arg;
1506
1507 memset(&tr, 0, sizeof(tr));
1508 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1509 return -EFAULT;
1510
1511 #ifdef CONFIG_ZCRYPT_DEBUG
1512 if (xcRB.status & (1U << 31)) {
1513 if (!capable(CAP_SYS_ADMIN))
1514 return -EPERM;
1515 tr.fi.cmd = (u16)(xcRB.status >> 16);
1516 }
1517 xcRB.status &= 0x0000FFFF;
1518 #endif
1519
1520 do {
1521 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
1522 if (rc == -EAGAIN)
1523 tr.again_counter++;
1524 #ifdef CONFIG_ZCRYPT_DEBUG
1525 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1526 break;
1527 #endif
1528 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1529 /* on failure: retry once again after a requested rescan */
1530 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1531 do {
1532 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB);
1533 if (rc == -EAGAIN)
1534 tr.again_counter++;
1535 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1536 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1537 rc = -EIO;
1538 if (rc)
1539 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1540 rc, xcRB.status);
1541 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1542 return -EFAULT;
1543 return rc;
1544 }
1545
zsendep11cprb_ioctl(struct ap_perms * perms,unsigned long arg)1546 static int zsendep11cprb_ioctl(struct ap_perms *perms, unsigned long arg)
1547 {
1548 int rc;
1549 struct ep11_urb xcrb;
1550 struct zcrypt_track tr;
1551 struct ep11_urb __user *uxcrb = (void __user *)arg;
1552
1553 memset(&tr, 0, sizeof(tr));
1554 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1555 return -EFAULT;
1556
1557 #ifdef CONFIG_ZCRYPT_DEBUG
1558 if (xcrb.req_len & (1ULL << 63)) {
1559 if (!capable(CAP_SYS_ADMIN))
1560 return -EPERM;
1561 tr.fi.cmd = (u16)(xcrb.req_len >> 48);
1562 }
1563 xcrb.req_len &= 0x0000FFFFFFFFFFFFULL;
1564 #endif
1565
1566 do {
1567 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1568 if (rc == -EAGAIN)
1569 tr.again_counter++;
1570 #ifdef CONFIG_ZCRYPT_DEBUG
1571 if (rc == -EAGAIN && (tr.fi.flags & AP_FI_FLAG_NO_RETRY))
1572 break;
1573 #endif
1574 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1575 /* on failure: retry once again after a requested rescan */
1576 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1577 do {
1578 rc = _zcrypt_send_ep11_cprb(true, perms, &tr, &xcrb);
1579 if (rc == -EAGAIN)
1580 tr.again_counter++;
1581 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1582 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1583 rc = -EIO;
1584 if (rc)
1585 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1586 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1587 return -EFAULT;
1588 return rc;
1589 }
1590
zcrypt_unlocked_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1591 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1592 unsigned long arg)
1593 {
1594 int rc;
1595 struct ap_perms *perms =
1596 (struct ap_perms *) filp->private_data;
1597
1598 rc = zcrypt_check_ioctl(perms, cmd);
1599 if (rc)
1600 return rc;
1601
1602 switch (cmd) {
1603 case ICARSAMODEXPO:
1604 return icarsamodexpo_ioctl(perms, arg);
1605 case ICARSACRT:
1606 return icarsacrt_ioctl(perms, arg);
1607 case ZSECSENDCPRB:
1608 return zsecsendcprb_ioctl(perms, arg);
1609 case ZSENDEP11CPRB:
1610 return zsendep11cprb_ioctl(perms, arg);
1611 case ZCRYPT_DEVICE_STATUS: {
1612 struct zcrypt_device_status_ext *device_status;
1613 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1614 * sizeof(struct zcrypt_device_status_ext);
1615
1616 device_status = kzalloc(total_size, GFP_KERNEL);
1617 if (!device_status)
1618 return -ENOMEM;
1619 zcrypt_device_status_mask_ext(device_status);
1620 if (copy_to_user((char __user *) arg, device_status,
1621 total_size))
1622 rc = -EFAULT;
1623 kfree(device_status);
1624 return rc;
1625 }
1626 case ZCRYPT_STATUS_MASK: {
1627 char status[AP_DEVICES];
1628
1629 zcrypt_status_mask(status, AP_DEVICES);
1630 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1631 return -EFAULT;
1632 return 0;
1633 }
1634 case ZCRYPT_QDEPTH_MASK: {
1635 char qdepth[AP_DEVICES];
1636
1637 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1638 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1639 return -EFAULT;
1640 return 0;
1641 }
1642 case ZCRYPT_PERDEV_REQCNT: {
1643 u32 *reqcnt;
1644
1645 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1646 if (!reqcnt)
1647 return -ENOMEM;
1648 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1649 if (copy_to_user((int __user *) arg, reqcnt,
1650 sizeof(u32) * AP_DEVICES))
1651 rc = -EFAULT;
1652 kfree(reqcnt);
1653 return rc;
1654 }
1655 case Z90STAT_REQUESTQ_COUNT:
1656 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1657 case Z90STAT_PENDINGQ_COUNT:
1658 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1659 case Z90STAT_TOTALOPEN_COUNT:
1660 return put_user(atomic_read(&zcrypt_open_count),
1661 (int __user *) arg);
1662 case Z90STAT_DOMAIN_INDEX:
1663 return put_user(ap_domain_index, (int __user *) arg);
1664 /*
1665 * Deprecated ioctls
1666 */
1667 case ZDEVICESTATUS: {
1668 /* the old ioctl supports only 64 adapters */
1669 struct zcrypt_device_status *device_status;
1670 size_t total_size = MAX_ZDEV_ENTRIES
1671 * sizeof(struct zcrypt_device_status);
1672
1673 device_status = kzalloc(total_size, GFP_KERNEL);
1674 if (!device_status)
1675 return -ENOMEM;
1676 zcrypt_device_status_mask(device_status);
1677 if (copy_to_user((char __user *) arg, device_status,
1678 total_size))
1679 rc = -EFAULT;
1680 kfree(device_status);
1681 return rc;
1682 }
1683 case Z90STAT_STATUS_MASK: {
1684 /* the old ioctl supports only 64 adapters */
1685 char status[MAX_ZDEV_CARDIDS];
1686
1687 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1688 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1689 return -EFAULT;
1690 return 0;
1691 }
1692 case Z90STAT_QDEPTH_MASK: {
1693 /* the old ioctl supports only 64 adapters */
1694 char qdepth[MAX_ZDEV_CARDIDS];
1695
1696 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1697 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1698 return -EFAULT;
1699 return 0;
1700 }
1701 case Z90STAT_PERDEV_REQCNT: {
1702 /* the old ioctl supports only 64 adapters */
1703 u32 reqcnt[MAX_ZDEV_CARDIDS];
1704
1705 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1706 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1707 return -EFAULT;
1708 return 0;
1709 }
1710 /* unknown ioctl number */
1711 default:
1712 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1713 return -ENOIOCTLCMD;
1714 }
1715 }
1716
1717 #ifdef CONFIG_COMPAT
1718 /*
1719 * ioctl32 conversion routines
1720 */
1721 struct compat_ica_rsa_modexpo {
1722 compat_uptr_t inputdata;
1723 unsigned int inputdatalength;
1724 compat_uptr_t outputdata;
1725 unsigned int outputdatalength;
1726 compat_uptr_t b_key;
1727 compat_uptr_t n_modulus;
1728 };
1729
trans_modexpo32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1730 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1731 unsigned int cmd, unsigned long arg)
1732 {
1733 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1734 struct compat_ica_rsa_modexpo mex32;
1735 struct ica_rsa_modexpo mex64;
1736 struct zcrypt_track tr;
1737 long rc;
1738
1739 memset(&tr, 0, sizeof(tr));
1740 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1741 return -EFAULT;
1742 mex64.inputdata = compat_ptr(mex32.inputdata);
1743 mex64.inputdatalength = mex32.inputdatalength;
1744 mex64.outputdata = compat_ptr(mex32.outputdata);
1745 mex64.outputdatalength = mex32.outputdatalength;
1746 mex64.b_key = compat_ptr(mex32.b_key);
1747 mex64.n_modulus = compat_ptr(mex32.n_modulus);
1748 do {
1749 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1750 if (rc == -EAGAIN)
1751 tr.again_counter++;
1752 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1753 /* on failure: retry once again after a requested rescan */
1754 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1755 do {
1756 rc = zcrypt_rsa_modexpo(perms, &tr, &mex64);
1757 if (rc == -EAGAIN)
1758 tr.again_counter++;
1759 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1760 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1761 rc = -EIO;
1762 if (rc)
1763 return rc;
1764 return put_user(mex64.outputdatalength,
1765 &umex32->outputdatalength);
1766 }
1767
1768 struct compat_ica_rsa_modexpo_crt {
1769 compat_uptr_t inputdata;
1770 unsigned int inputdatalength;
1771 compat_uptr_t outputdata;
1772 unsigned int outputdatalength;
1773 compat_uptr_t bp_key;
1774 compat_uptr_t bq_key;
1775 compat_uptr_t np_prime;
1776 compat_uptr_t nq_prime;
1777 compat_uptr_t u_mult_inv;
1778 };
1779
trans_modexpo_crt32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1780 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1781 unsigned int cmd, unsigned long arg)
1782 {
1783 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1784 struct compat_ica_rsa_modexpo_crt crt32;
1785 struct ica_rsa_modexpo_crt crt64;
1786 struct zcrypt_track tr;
1787 long rc;
1788
1789 memset(&tr, 0, sizeof(tr));
1790 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1791 return -EFAULT;
1792 crt64.inputdata = compat_ptr(crt32.inputdata);
1793 crt64.inputdatalength = crt32.inputdatalength;
1794 crt64.outputdata = compat_ptr(crt32.outputdata);
1795 crt64.outputdatalength = crt32.outputdatalength;
1796 crt64.bp_key = compat_ptr(crt32.bp_key);
1797 crt64.bq_key = compat_ptr(crt32.bq_key);
1798 crt64.np_prime = compat_ptr(crt32.np_prime);
1799 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1800 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1801 do {
1802 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1803 if (rc == -EAGAIN)
1804 tr.again_counter++;
1805 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1806 /* on failure: retry once again after a requested rescan */
1807 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1808 do {
1809 rc = zcrypt_rsa_crt(perms, &tr, &crt64);
1810 if (rc == -EAGAIN)
1811 tr.again_counter++;
1812 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1813 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1814 rc = -EIO;
1815 if (rc)
1816 return rc;
1817 return put_user(crt64.outputdatalength,
1818 &ucrt32->outputdatalength);
1819 }
1820
1821 struct compat_ica_xcRB {
1822 unsigned short agent_ID;
1823 unsigned int user_defined;
1824 unsigned short request_ID;
1825 unsigned int request_control_blk_length;
1826 unsigned char padding1[16 - sizeof(compat_uptr_t)];
1827 compat_uptr_t request_control_blk_addr;
1828 unsigned int request_data_length;
1829 char padding2[16 - sizeof(compat_uptr_t)];
1830 compat_uptr_t request_data_address;
1831 unsigned int reply_control_blk_length;
1832 char padding3[16 - sizeof(compat_uptr_t)];
1833 compat_uptr_t reply_control_blk_addr;
1834 unsigned int reply_data_length;
1835 char padding4[16 - sizeof(compat_uptr_t)];
1836 compat_uptr_t reply_data_addr;
1837 unsigned short priority_window;
1838 unsigned int status;
1839 } __packed;
1840
trans_xcRB32(struct ap_perms * perms,struct file * filp,unsigned int cmd,unsigned long arg)1841 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1842 unsigned int cmd, unsigned long arg)
1843 {
1844 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1845 struct compat_ica_xcRB xcRB32;
1846 struct zcrypt_track tr;
1847 struct ica_xcRB xcRB64;
1848 long rc;
1849
1850 memset(&tr, 0, sizeof(tr));
1851 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1852 return -EFAULT;
1853 xcRB64.agent_ID = xcRB32.agent_ID;
1854 xcRB64.user_defined = xcRB32.user_defined;
1855 xcRB64.request_ID = xcRB32.request_ID;
1856 xcRB64.request_control_blk_length =
1857 xcRB32.request_control_blk_length;
1858 xcRB64.request_control_blk_addr =
1859 compat_ptr(xcRB32.request_control_blk_addr);
1860 xcRB64.request_data_length =
1861 xcRB32.request_data_length;
1862 xcRB64.request_data_address =
1863 compat_ptr(xcRB32.request_data_address);
1864 xcRB64.reply_control_blk_length =
1865 xcRB32.reply_control_blk_length;
1866 xcRB64.reply_control_blk_addr =
1867 compat_ptr(xcRB32.reply_control_blk_addr);
1868 xcRB64.reply_data_length = xcRB32.reply_data_length;
1869 xcRB64.reply_data_addr =
1870 compat_ptr(xcRB32.reply_data_addr);
1871 xcRB64.priority_window = xcRB32.priority_window;
1872 xcRB64.status = xcRB32.status;
1873 do {
1874 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
1875 if (rc == -EAGAIN)
1876 tr.again_counter++;
1877 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1878 /* on failure: retry once again after a requested rescan */
1879 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1880 do {
1881 rc = _zcrypt_send_cprb(true, perms, &tr, &xcRB64);
1882 if (rc == -EAGAIN)
1883 tr.again_counter++;
1884 } while (rc == -EAGAIN && tr.again_counter < TRACK_AGAIN_MAX);
1885 if (rc == -EAGAIN && tr.again_counter >= TRACK_AGAIN_MAX)
1886 rc = -EIO;
1887 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1888 xcRB32.reply_data_length = xcRB64.reply_data_length;
1889 xcRB32.status = xcRB64.status;
1890 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1891 return -EFAULT;
1892 return rc;
1893 }
1894
zcrypt_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1895 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1896 unsigned long arg)
1897 {
1898 int rc;
1899 struct ap_perms *perms =
1900 (struct ap_perms *) filp->private_data;
1901
1902 rc = zcrypt_check_ioctl(perms, cmd);
1903 if (rc)
1904 return rc;
1905
1906 if (cmd == ICARSAMODEXPO)
1907 return trans_modexpo32(perms, filp, cmd, arg);
1908 if (cmd == ICARSACRT)
1909 return trans_modexpo_crt32(perms, filp, cmd, arg);
1910 if (cmd == ZSECSENDCPRB)
1911 return trans_xcRB32(perms, filp, cmd, arg);
1912 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1913 }
1914 #endif
1915
1916 /*
1917 * Misc device file operations.
1918 */
1919 static const struct file_operations zcrypt_fops = {
1920 .owner = THIS_MODULE,
1921 .read = zcrypt_read,
1922 .write = zcrypt_write,
1923 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1924 #ifdef CONFIG_COMPAT
1925 .compat_ioctl = zcrypt_compat_ioctl,
1926 #endif
1927 .open = zcrypt_open,
1928 .release = zcrypt_release,
1929 .llseek = no_llseek,
1930 };
1931
1932 /*
1933 * Misc device.
1934 */
1935 static struct miscdevice zcrypt_misc_device = {
1936 .minor = MISC_DYNAMIC_MINOR,
1937 .name = "z90crypt",
1938 .fops = &zcrypt_fops,
1939 };
1940
1941 static int zcrypt_rng_device_count;
1942 static u32 *zcrypt_rng_buffer;
1943 static int zcrypt_rng_buffer_index;
1944 static DEFINE_MUTEX(zcrypt_rng_mutex);
1945
zcrypt_rng_data_read(struct hwrng * rng,u32 * data)1946 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1947 {
1948 int rc;
1949
1950 /*
1951 * We don't need locking here because the RNG API guarantees serialized
1952 * read method calls.
1953 */
1954 if (zcrypt_rng_buffer_index == 0) {
1955 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1956 /* on failure: retry once again after a requested rescan */
1957 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1958 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1959 if (rc < 0)
1960 return -EIO;
1961 zcrypt_rng_buffer_index = rc / sizeof(*data);
1962 }
1963 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1964 return sizeof(*data);
1965 }
1966
1967 static struct hwrng zcrypt_rng_dev = {
1968 .name = "zcrypt",
1969 .data_read = zcrypt_rng_data_read,
1970 .quality = 990,
1971 };
1972
zcrypt_rng_device_add(void)1973 int zcrypt_rng_device_add(void)
1974 {
1975 int rc = 0;
1976
1977 mutex_lock(&zcrypt_rng_mutex);
1978 if (zcrypt_rng_device_count == 0) {
1979 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1980 if (!zcrypt_rng_buffer) {
1981 rc = -ENOMEM;
1982 goto out;
1983 }
1984 zcrypt_rng_buffer_index = 0;
1985 if (!zcrypt_hwrng_seed)
1986 zcrypt_rng_dev.quality = 0;
1987 rc = hwrng_register(&zcrypt_rng_dev);
1988 if (rc)
1989 goto out_free;
1990 zcrypt_rng_device_count = 1;
1991 } else
1992 zcrypt_rng_device_count++;
1993 mutex_unlock(&zcrypt_rng_mutex);
1994 return 0;
1995
1996 out_free:
1997 free_page((unsigned long) zcrypt_rng_buffer);
1998 out:
1999 mutex_unlock(&zcrypt_rng_mutex);
2000 return rc;
2001 }
2002
zcrypt_rng_device_remove(void)2003 void zcrypt_rng_device_remove(void)
2004 {
2005 mutex_lock(&zcrypt_rng_mutex);
2006 zcrypt_rng_device_count--;
2007 if (zcrypt_rng_device_count == 0) {
2008 hwrng_unregister(&zcrypt_rng_dev);
2009 free_page((unsigned long) zcrypt_rng_buffer);
2010 }
2011 mutex_unlock(&zcrypt_rng_mutex);
2012 }
2013
2014 /*
2015 * Wait until the zcrypt api is operational.
2016 * The AP bus scan and the binding of ap devices to device drivers is
2017 * an asynchronous job. This function waits until these initial jobs
2018 * are done and so the zcrypt api should be ready to serve crypto
2019 * requests - if there are resources available. The function uses an
2020 * internal timeout of 60s. The very first caller will either wait for
2021 * ap bus bindings complete or the timeout happens. This state will be
2022 * remembered for further callers which will only be blocked until a
2023 * decision is made (timeout or bindings complete).
2024 * On timeout -ETIME is returned, on success the return value is 0.
2025 */
zcrypt_wait_api_operational(void)2026 int zcrypt_wait_api_operational(void)
2027 {
2028 static DEFINE_MUTEX(zcrypt_wait_api_lock);
2029 static int zcrypt_wait_api_state;
2030 int rc;
2031
2032 rc = mutex_lock_interruptible(&zcrypt_wait_api_lock);
2033 if (rc)
2034 return rc;
2035
2036 switch (zcrypt_wait_api_state) {
2037 case 0:
2038 /* initial state, invoke wait for the ap bus complete */
2039 rc = ap_wait_init_apqn_bindings_complete(
2040 msecs_to_jiffies(60 * 1000));
2041 switch (rc) {
2042 case 0:
2043 /* ap bus bindings are complete */
2044 zcrypt_wait_api_state = 1;
2045 break;
2046 case -EINTR:
2047 /* interrupted, go back to caller */
2048 break;
2049 case -ETIME:
2050 /* timeout */
2051 ZCRYPT_DBF(DBF_WARN,
2052 "%s ap_wait_init_apqn_bindings_complete() returned with ETIME\n",
2053 __func__);
2054 zcrypt_wait_api_state = -ETIME;
2055 break;
2056 default:
2057 /* other failure */
2058 ZCRYPT_DBF(DBF_DEBUG,
2059 "%s ap_wait_init_apqn_bindings_complete() failure rc=%d\n",
2060 __func__, rc);
2061 break;
2062 }
2063 break;
2064 case 1:
2065 /* a previous caller already found ap bus bindings complete */
2066 rc = 0;
2067 break;
2068 default:
2069 /* a previous caller had timeout or other failure */
2070 rc = zcrypt_wait_api_state;
2071 break;
2072 }
2073
2074 mutex_unlock(&zcrypt_wait_api_lock);
2075
2076 return rc;
2077 }
2078 EXPORT_SYMBOL(zcrypt_wait_api_operational);
2079
zcrypt_debug_init(void)2080 int __init zcrypt_debug_init(void)
2081 {
2082 zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
2083 DBF_MAX_SPRINTF_ARGS * sizeof(long));
2084 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
2085 debug_set_level(zcrypt_dbf_info, DBF_ERR);
2086
2087 return 0;
2088 }
2089
zcrypt_debug_exit(void)2090 void zcrypt_debug_exit(void)
2091 {
2092 debug_unregister(zcrypt_dbf_info);
2093 }
2094
2095 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2096
zcdn_init(void)2097 static int __init zcdn_init(void)
2098 {
2099 int rc;
2100
2101 /* create a new class 'zcrypt' */
2102 zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
2103 if (IS_ERR(zcrypt_class)) {
2104 rc = PTR_ERR(zcrypt_class);
2105 goto out_class_create_failed;
2106 }
2107 zcrypt_class->dev_release = zcdn_device_release;
2108
2109 /* alloc device minor range */
2110 rc = alloc_chrdev_region(&zcrypt_devt,
2111 0, ZCRYPT_MAX_MINOR_NODES,
2112 ZCRYPT_NAME);
2113 if (rc)
2114 goto out_alloc_chrdev_failed;
2115
2116 cdev_init(&zcrypt_cdev, &zcrypt_fops);
2117 zcrypt_cdev.owner = THIS_MODULE;
2118 rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2119 if (rc)
2120 goto out_cdev_add_failed;
2121
2122 /* need some class specific sysfs attributes */
2123 rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
2124 if (rc)
2125 goto out_class_create_file_1_failed;
2126 rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
2127 if (rc)
2128 goto out_class_create_file_2_failed;
2129
2130 return 0;
2131
2132 out_class_create_file_2_failed:
2133 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2134 out_class_create_file_1_failed:
2135 cdev_del(&zcrypt_cdev);
2136 out_cdev_add_failed:
2137 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2138 out_alloc_chrdev_failed:
2139 class_destroy(zcrypt_class);
2140 out_class_create_failed:
2141 return rc;
2142 }
2143
zcdn_exit(void)2144 static void zcdn_exit(void)
2145 {
2146 class_remove_file(zcrypt_class, &class_attr_zcdn_create);
2147 class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
2148 zcdn_destroy_all();
2149 cdev_del(&zcrypt_cdev);
2150 unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
2151 class_destroy(zcrypt_class);
2152 }
2153
2154 #endif
2155
2156 /*
2157 * zcrypt_api_init(): Module initialization.
2158 *
2159 * The module initialization code.
2160 */
zcrypt_api_init(void)2161 int __init zcrypt_api_init(void)
2162 {
2163 int rc;
2164
2165 rc = zcrypt_debug_init();
2166 if (rc)
2167 goto out;
2168
2169 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2170 rc = zcdn_init();
2171 if (rc)
2172 goto out;
2173 #endif
2174
2175 /* Register the request sprayer. */
2176 rc = misc_register(&zcrypt_misc_device);
2177 if (rc < 0)
2178 goto out_misc_register_failed;
2179
2180 zcrypt_msgtype6_init();
2181 zcrypt_msgtype50_init();
2182
2183 return 0;
2184
2185 out_misc_register_failed:
2186 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2187 zcdn_exit();
2188 #endif
2189 zcrypt_debug_exit();
2190 out:
2191 return rc;
2192 }
2193
2194 /*
2195 * zcrypt_api_exit(): Module termination.
2196 *
2197 * The module termination code.
2198 */
zcrypt_api_exit(void)2199 void __exit zcrypt_api_exit(void)
2200 {
2201 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
2202 zcdn_exit();
2203 #endif
2204 misc_deregister(&zcrypt_misc_device);
2205 zcrypt_msgtype6_exit();
2206 zcrypt_msgtype50_exit();
2207 zcrypt_ccamisc_exit();
2208 zcrypt_ep11misc_exit();
2209 zcrypt_debug_exit();
2210 }
2211
2212 module_init(zcrypt_api_init);
2213 module_exit(zcrypt_api_exit);
2214
