]> Git Repo - linux.git/blob - drivers/s390/crypto/zcrypt_api.c
nfsd4: a client's own opens needn't prevent delegations
[linux.git] / drivers / s390 / crypto / zcrypt_api.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  *  Copyright IBM Corp. 2001, 2018
4  *  Author(s): Robert Burroughs
5  *             Eric Rossman ([email protected])
6  *             Cornelia Huck <[email protected]>
7  *
8  *  Hotplug & misc device support: Jochen Roehrig ([email protected])
9  *  Major cleanup & driver split: Martin Schwidefsky <[email protected]>
10  *                                Ralph Wuerthner <[email protected]>
11  *  MSGTYPE restruct:             Holger Dengler <[email protected]>
12  *  Multiple device nodes: Harald Freudenberger <[email protected]>
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 <asm/debug.h>
29
30 #define CREATE_TRACE_POINTS
31 #include <asm/trace/zcrypt.h>
32
33 #include "zcrypt_api.h"
34 #include "zcrypt_debug.h"
35
36 #include "zcrypt_msgtype6.h"
37 #include "zcrypt_msgtype50.h"
38 #include "zcrypt_ccamisc.h"
39 #include "zcrypt_ep11misc.h"
40
41 /*
42  * Module description.
43  */
44 MODULE_AUTHOR("IBM Corporation");
45 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
46                    "Copyright IBM Corp. 2001, 2012");
47 MODULE_LICENSE("GPL");
48
49 /*
50  * zcrypt tracepoint functions
51  */
52 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
53 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
54
55 static int zcrypt_hwrng_seed = 1;
56 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, 0440);
57 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
58
59 DEFINE_SPINLOCK(zcrypt_list_lock);
60 LIST_HEAD(zcrypt_card_list);
61 int zcrypt_device_count;
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  */
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
92 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
93 {
94         list_add_tail(&zops->list, &zcrypt_ops_list);
95 }
96
97 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
98 {
99         list_del_init(&zops->list);
100 }
101
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  */
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  */
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
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
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
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
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
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
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
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
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
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
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
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
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  */
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  */
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  */
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  */
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
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
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
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
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.drv->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.drv->driver.owner;
583         return zq;
584 }
585
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
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 false;
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
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 false;
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  */
632 static long zcrypt_rsa_modexpo(struct ap_perms *perms,
633                                struct ica_rsa_modexpo *mex)
634 {
635         struct zcrypt_card *zc, *pref_zc;
636         struct zcrypt_queue *zq, *pref_zq;
637         unsigned int weight, pref_weight;
638         unsigned int func_code;
639         int qid = 0, rc = -ENODEV;
640         struct module *mod;
641
642         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
643
644         if (mex->outputdatalength < mex->inputdatalength) {
645                 func_code = 0;
646                 rc = -EINVAL;
647                 goto out;
648         }
649
650         /*
651          * As long as outputdatalength is big enough, we can set the
652          * outputdatalength equal to the inputdatalength, since that is the
653          * number of bytes we will copy in any case
654          */
655         mex->outputdatalength = mex->inputdatalength;
656
657         rc = get_rsa_modex_fc(mex, &func_code);
658         if (rc)
659                 goto out;
660
661         pref_zc = NULL;
662         pref_zq = NULL;
663         spin_lock(&zcrypt_list_lock);
664         for_each_zcrypt_card(zc) {
665                 /* Check for online accelarator and CCA cards */
666                 if (!zc->online || !(zc->card->functions & 0x18000000))
667                         continue;
668                 /* Check for size limits */
669                 if (zc->min_mod_size > mex->inputdatalength ||
670                     zc->max_mod_size < mex->inputdatalength)
671                         continue;
672                 /* check if device node has admission for this card */
673                 if (!zcrypt_check_card(perms, zc->card->id))
674                         continue;
675                 /* get weight index of the card device  */
676                 weight = zc->speed_rating[func_code];
677                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
678                         continue;
679                 for_each_zcrypt_queue(zq, zc) {
680                         /* check if device is online and eligible */
681                         if (!zq->online || !zq->ops->rsa_modexpo)
682                                 continue;
683                         /* check if device node has admission for this queue */
684                         if (!zcrypt_check_queue(perms,
685                                                 AP_QID_QUEUE(zq->queue->qid)))
686                                 continue;
687                         if (zcrypt_queue_compare(zq, pref_zq,
688                                                  weight, pref_weight))
689                                 continue;
690                         pref_zc = zc;
691                         pref_zq = zq;
692                         pref_weight = weight;
693                 }
694         }
695         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
696         spin_unlock(&zcrypt_list_lock);
697
698         if (!pref_zq) {
699                 rc = -ENODEV;
700                 goto out;
701         }
702
703         qid = pref_zq->queue->qid;
704         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
705
706         spin_lock(&zcrypt_list_lock);
707         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
708         spin_unlock(&zcrypt_list_lock);
709
710 out:
711         trace_s390_zcrypt_rep(mex, func_code, rc,
712                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
713         return rc;
714 }
715
716 static long zcrypt_rsa_crt(struct ap_perms *perms,
717                            struct ica_rsa_modexpo_crt *crt)
718 {
719         struct zcrypt_card *zc, *pref_zc;
720         struct zcrypt_queue *zq, *pref_zq;
721         unsigned int weight, pref_weight;
722         unsigned int func_code;
723         int qid = 0, rc = -ENODEV;
724         struct module *mod;
725
726         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
727
728         if (crt->outputdatalength < crt->inputdatalength) {
729                 func_code = 0;
730                 rc = -EINVAL;
731                 goto out;
732         }
733
734         /*
735          * As long as outputdatalength is big enough, we can set the
736          * outputdatalength equal to the inputdatalength, since that is the
737          * number of bytes we will copy in any case
738          */
739         crt->outputdatalength = crt->inputdatalength;
740
741         rc = get_rsa_crt_fc(crt, &func_code);
742         if (rc)
743                 goto out;
744
745         pref_zc = NULL;
746         pref_zq = NULL;
747         spin_lock(&zcrypt_list_lock);
748         for_each_zcrypt_card(zc) {
749                 /* Check for online accelarator and CCA cards */
750                 if (!zc->online || !(zc->card->functions & 0x18000000))
751                         continue;
752                 /* Check for size limits */
753                 if (zc->min_mod_size > crt->inputdatalength ||
754                     zc->max_mod_size < crt->inputdatalength)
755                         continue;
756                 /* check if device node has admission for this card */
757                 if (!zcrypt_check_card(perms, zc->card->id))
758                         continue;
759                 /* get weight index of the card device  */
760                 weight = zc->speed_rating[func_code];
761                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
762                         continue;
763                 for_each_zcrypt_queue(zq, zc) {
764                         /* check if device is online and eligible */
765                         if (!zq->online || !zq->ops->rsa_modexpo_crt)
766                                 continue;
767                         /* check if device node has admission for this queue */
768                         if (!zcrypt_check_queue(perms,
769                                                 AP_QID_QUEUE(zq->queue->qid)))
770                                 continue;
771                         if (zcrypt_queue_compare(zq, pref_zq,
772                                                  weight, pref_weight))
773                                 continue;
774                         pref_zc = zc;
775                         pref_zq = zq;
776                         pref_weight = weight;
777                 }
778         }
779         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
780         spin_unlock(&zcrypt_list_lock);
781
782         if (!pref_zq) {
783                 rc = -ENODEV;
784                 goto out;
785         }
786
787         qid = pref_zq->queue->qid;
788         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
789
790         spin_lock(&zcrypt_list_lock);
791         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
792         spin_unlock(&zcrypt_list_lock);
793
794 out:
795         trace_s390_zcrypt_rep(crt, func_code, rc,
796                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
797         return rc;
798 }
799
800 static long _zcrypt_send_cprb(struct ap_perms *perms,
801                               struct ica_xcRB *xcRB)
802 {
803         struct zcrypt_card *zc, *pref_zc;
804         struct zcrypt_queue *zq, *pref_zq;
805         struct ap_message ap_msg;
806         unsigned int weight, pref_weight;
807         unsigned int func_code;
808         unsigned short *domain, tdom;
809         int qid = 0, rc = -ENODEV;
810         struct module *mod;
811
812         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
813
814         xcRB->status = 0;
815         ap_init_message(&ap_msg);
816         rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
817         if (rc)
818                 goto out;
819
820         /*
821          * If a valid target domain is set and this domain is NOT a usage
822          * domain but a control only domain, use the default domain as target.
823          */
824         tdom = *domain;
825         if (tdom >= 0 && tdom < AP_DOMAINS &&
826             !ap_test_config_usage_domain(tdom) &&
827             ap_test_config_ctrl_domain(tdom) &&
828             ap_domain_index >= 0)
829                 tdom = ap_domain_index;
830
831         pref_zc = NULL;
832         pref_zq = NULL;
833         spin_lock(&zcrypt_list_lock);
834         for_each_zcrypt_card(zc) {
835                 /* Check for online CCA cards */
836                 if (!zc->online || !(zc->card->functions & 0x10000000))
837                         continue;
838                 /* Check for user selected CCA card */
839                 if (xcRB->user_defined != AUTOSELECT &&
840                     xcRB->user_defined != zc->card->id)
841                         continue;
842                 /* check if device node has admission for this card */
843                 if (!zcrypt_check_card(perms, zc->card->id))
844                         continue;
845                 /* get weight index of the card device  */
846                 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
847                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
848                         continue;
849                 for_each_zcrypt_queue(zq, zc) {
850                         /* check if device is online and eligible */
851                         if (!zq->online ||
852                             !zq->ops->send_cprb ||
853                             (tdom != AUTOSEL_DOM &&
854                              tdom != AP_QID_QUEUE(zq->queue->qid)))
855                                 continue;
856                         /* check if device node has admission for this queue */
857                         if (!zcrypt_check_queue(perms,
858                                                 AP_QID_QUEUE(zq->queue->qid)))
859                                 continue;
860                         if (zcrypt_queue_compare(zq, pref_zq,
861                                                  weight, pref_weight))
862                                 continue;
863                         pref_zc = zc;
864                         pref_zq = zq;
865                         pref_weight = weight;
866                 }
867         }
868         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
869         spin_unlock(&zcrypt_list_lock);
870
871         if (!pref_zq) {
872                 rc = -ENODEV;
873                 goto out;
874         }
875
876         /* in case of auto select, provide the correct domain */
877         qid = pref_zq->queue->qid;
878         if (*domain == AUTOSEL_DOM)
879                 *domain = AP_QID_QUEUE(qid);
880
881         rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
882
883         spin_lock(&zcrypt_list_lock);
884         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
885         spin_unlock(&zcrypt_list_lock);
886
887 out:
888         ap_release_message(&ap_msg);
889         trace_s390_zcrypt_rep(xcRB, func_code, rc,
890                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
891         return rc;
892 }
893
894 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
895 {
896         return _zcrypt_send_cprb(&ap_perms, xcRB);
897 }
898 EXPORT_SYMBOL(zcrypt_send_cprb);
899
900 static bool is_desired_ep11_card(unsigned int dev_id,
901                                  unsigned short target_num,
902                                  struct ep11_target_dev *targets)
903 {
904         while (target_num-- > 0) {
905                 if (targets->ap_id == dev_id || targets->ap_id == AUTOSEL_AP)
906                         return true;
907                 targets++;
908         }
909         return false;
910 }
911
912 static bool is_desired_ep11_queue(unsigned int dev_qid,
913                                   unsigned short target_num,
914                                   struct ep11_target_dev *targets)
915 {
916         int card = AP_QID_CARD(dev_qid), dom = AP_QID_QUEUE(dev_qid);
917
918         while (target_num-- > 0) {
919                 if ((targets->ap_id == card || targets->ap_id == AUTOSEL_AP) &&
920                     (targets->dom_id == dom || targets->dom_id == AUTOSEL_DOM))
921                         return true;
922                 targets++;
923         }
924         return false;
925 }
926
927 static long _zcrypt_send_ep11_cprb(struct ap_perms *perms,
928                                    struct ep11_urb *xcrb)
929 {
930         struct zcrypt_card *zc, *pref_zc;
931         struct zcrypt_queue *zq, *pref_zq;
932         struct ep11_target_dev *targets;
933         unsigned short target_num;
934         unsigned int weight, pref_weight;
935         unsigned int func_code;
936         struct ap_message ap_msg;
937         int qid = 0, rc = -ENODEV;
938         struct module *mod;
939
940         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
941
942         ap_init_message(&ap_msg);
943
944         target_num = (unsigned short) xcrb->targets_num;
945
946         /* empty list indicates autoselect (all available targets) */
947         targets = NULL;
948         if (target_num != 0) {
949                 struct ep11_target_dev __user *uptr;
950
951                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
952                 if (!targets) {
953                         func_code = 0;
954                         rc = -ENOMEM;
955                         goto out;
956                 }
957
958                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
959                 if (copy_from_user(targets, uptr,
960                                    target_num * sizeof(*targets))) {
961                         func_code = 0;
962                         rc = -EFAULT;
963                         goto out_free;
964                 }
965         }
966
967         rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
968         if (rc)
969                 goto out_free;
970
971         pref_zc = NULL;
972         pref_zq = NULL;
973         spin_lock(&zcrypt_list_lock);
974         for_each_zcrypt_card(zc) {
975                 /* Check for online EP11 cards */
976                 if (!zc->online || !(zc->card->functions & 0x04000000))
977                         continue;
978                 /* Check for user selected EP11 card */
979                 if (targets &&
980                     !is_desired_ep11_card(zc->card->id, target_num, targets))
981                         continue;
982                 /* check if device node has admission for this card */
983                 if (!zcrypt_check_card(perms, zc->card->id))
984                         continue;
985                 /* get weight index of the card device  */
986                 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
987                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
988                         continue;
989                 for_each_zcrypt_queue(zq, zc) {
990                         /* check if device is online and eligible */
991                         if (!zq->online ||
992                             !zq->ops->send_ep11_cprb ||
993                             (targets &&
994                              !is_desired_ep11_queue(zq->queue->qid,
995                                                     target_num, targets)))
996                                 continue;
997                         /* check if device node has admission for this queue */
998                         if (!zcrypt_check_queue(perms,
999                                                 AP_QID_QUEUE(zq->queue->qid)))
1000                                 continue;
1001                         if (zcrypt_queue_compare(zq, pref_zq,
1002                                                  weight, pref_weight))
1003                                 continue;
1004                         pref_zc = zc;
1005                         pref_zq = zq;
1006                         pref_weight = weight;
1007                 }
1008         }
1009         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1010         spin_unlock(&zcrypt_list_lock);
1011
1012         if (!pref_zq) {
1013                 rc = -ENODEV;
1014                 goto out_free;
1015         }
1016
1017         qid = pref_zq->queue->qid;
1018         rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
1019
1020         spin_lock(&zcrypt_list_lock);
1021         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1022         spin_unlock(&zcrypt_list_lock);
1023
1024 out_free:
1025         kfree(targets);
1026 out:
1027         ap_release_message(&ap_msg);
1028         trace_s390_zcrypt_rep(xcrb, func_code, rc,
1029                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1030         return rc;
1031 }
1032
1033 long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
1034 {
1035         return _zcrypt_send_ep11_cprb(&ap_perms, xcrb);
1036 }
1037 EXPORT_SYMBOL(zcrypt_send_ep11_cprb);
1038
1039 static long zcrypt_rng(char *buffer)
1040 {
1041         struct zcrypt_card *zc, *pref_zc;
1042         struct zcrypt_queue *zq, *pref_zq;
1043         unsigned int weight, pref_weight;
1044         unsigned int func_code;
1045         struct ap_message ap_msg;
1046         unsigned int domain;
1047         int qid = 0, rc = -ENODEV;
1048         struct module *mod;
1049
1050         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
1051
1052         ap_init_message(&ap_msg);
1053         rc = get_rng_fc(&ap_msg, &func_code, &domain);
1054         if (rc)
1055                 goto out;
1056
1057         pref_zc = NULL;
1058         pref_zq = NULL;
1059         spin_lock(&zcrypt_list_lock);
1060         for_each_zcrypt_card(zc) {
1061                 /* Check for online CCA cards */
1062                 if (!zc->online || !(zc->card->functions & 0x10000000))
1063                         continue;
1064                 /* get weight index of the card device  */
1065                 weight = zc->speed_rating[func_code];
1066                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
1067                         continue;
1068                 for_each_zcrypt_queue(zq, zc) {
1069                         /* check if device is online and eligible */
1070                         if (!zq->online || !zq->ops->rng)
1071                                 continue;
1072                         if (zcrypt_queue_compare(zq, pref_zq,
1073                                                  weight, pref_weight))
1074                                 continue;
1075                         pref_zc = zc;
1076                         pref_zq = zq;
1077                         pref_weight = weight;
1078                 }
1079         }
1080         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
1081         spin_unlock(&zcrypt_list_lock);
1082
1083         if (!pref_zq) {
1084                 rc = -ENODEV;
1085                 goto out;
1086         }
1087
1088         qid = pref_zq->queue->qid;
1089         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
1090
1091         spin_lock(&zcrypt_list_lock);
1092         zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
1093         spin_unlock(&zcrypt_list_lock);
1094
1095 out:
1096         ap_release_message(&ap_msg);
1097         trace_s390_zcrypt_rep(buffer, func_code, rc,
1098                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
1099         return rc;
1100 }
1101
1102 static void zcrypt_device_status_mask(struct zcrypt_device_status *devstatus)
1103 {
1104         struct zcrypt_card *zc;
1105         struct zcrypt_queue *zq;
1106         struct zcrypt_device_status *stat;
1107         int card, queue;
1108
1109         memset(devstatus, 0, MAX_ZDEV_ENTRIES
1110                * sizeof(struct zcrypt_device_status));
1111
1112         spin_lock(&zcrypt_list_lock);
1113         for_each_zcrypt_card(zc) {
1114                 for_each_zcrypt_queue(zq, zc) {
1115                         card = AP_QID_CARD(zq->queue->qid);
1116                         if (card >= MAX_ZDEV_CARDIDS)
1117                                 continue;
1118                         queue = AP_QID_QUEUE(zq->queue->qid);
1119                         stat = &devstatus[card * AP_DOMAINS + queue];
1120                         stat->hwtype = zc->card->ap_dev.device_type;
1121                         stat->functions = zc->card->functions >> 26;
1122                         stat->qid = zq->queue->qid;
1123                         stat->online = zq->online ? 0x01 : 0x00;
1124                 }
1125         }
1126         spin_unlock(&zcrypt_list_lock);
1127 }
1128
1129 void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus)
1130 {
1131         struct zcrypt_card *zc;
1132         struct zcrypt_queue *zq;
1133         struct zcrypt_device_status_ext *stat;
1134         int card, queue;
1135
1136         memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT
1137                * sizeof(struct zcrypt_device_status_ext));
1138
1139         spin_lock(&zcrypt_list_lock);
1140         for_each_zcrypt_card(zc) {
1141                 for_each_zcrypt_queue(zq, zc) {
1142                         card = AP_QID_CARD(zq->queue->qid);
1143                         queue = AP_QID_QUEUE(zq->queue->qid);
1144                         stat = &devstatus[card * AP_DOMAINS + queue];
1145                         stat->hwtype = zc->card->ap_dev.device_type;
1146                         stat->functions = zc->card->functions >> 26;
1147                         stat->qid = zq->queue->qid;
1148                         stat->online = zq->online ? 0x01 : 0x00;
1149                 }
1150         }
1151         spin_unlock(&zcrypt_list_lock);
1152 }
1153 EXPORT_SYMBOL(zcrypt_device_status_mask_ext);
1154
1155 int zcrypt_device_status_ext(int card, int queue,
1156                              struct zcrypt_device_status_ext *devstat)
1157 {
1158         struct zcrypt_card *zc;
1159         struct zcrypt_queue *zq;
1160
1161         memset(devstat, 0, sizeof(*devstat));
1162
1163         spin_lock(&zcrypt_list_lock);
1164         for_each_zcrypt_card(zc) {
1165                 for_each_zcrypt_queue(zq, zc) {
1166                         if (card == AP_QID_CARD(zq->queue->qid) &&
1167                             queue == AP_QID_QUEUE(zq->queue->qid)) {
1168                                 devstat->hwtype = zc->card->ap_dev.device_type;
1169                                 devstat->functions = zc->card->functions >> 26;
1170                                 devstat->qid = zq->queue->qid;
1171                                 devstat->online = zq->online ? 0x01 : 0x00;
1172                                 spin_unlock(&zcrypt_list_lock);
1173                                 return 0;
1174                         }
1175                 }
1176         }
1177         spin_unlock(&zcrypt_list_lock);
1178
1179         return -ENODEV;
1180 }
1181 EXPORT_SYMBOL(zcrypt_device_status_ext);
1182
1183 static void zcrypt_status_mask(char status[], size_t max_adapters)
1184 {
1185         struct zcrypt_card *zc;
1186         struct zcrypt_queue *zq;
1187         int card;
1188
1189         memset(status, 0, max_adapters);
1190         spin_lock(&zcrypt_list_lock);
1191         for_each_zcrypt_card(zc) {
1192                 for_each_zcrypt_queue(zq, zc) {
1193                         card = AP_QID_CARD(zq->queue->qid);
1194                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1195                             || card >= max_adapters)
1196                                 continue;
1197                         status[card] = zc->online ? zc->user_space_type : 0x0d;
1198                 }
1199         }
1200         spin_unlock(&zcrypt_list_lock);
1201 }
1202
1203 static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters)
1204 {
1205         struct zcrypt_card *zc;
1206         struct zcrypt_queue *zq;
1207         int card;
1208
1209         memset(qdepth, 0, max_adapters);
1210         spin_lock(&zcrypt_list_lock);
1211         local_bh_disable();
1212         for_each_zcrypt_card(zc) {
1213                 for_each_zcrypt_queue(zq, zc) {
1214                         card = AP_QID_CARD(zq->queue->qid);
1215                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1216                             || card >= max_adapters)
1217                                 continue;
1218                         spin_lock(&zq->queue->lock);
1219                         qdepth[card] =
1220                                 zq->queue->pendingq_count +
1221                                 zq->queue->requestq_count;
1222                         spin_unlock(&zq->queue->lock);
1223                 }
1224         }
1225         local_bh_enable();
1226         spin_unlock(&zcrypt_list_lock);
1227 }
1228
1229 static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters)
1230 {
1231         struct zcrypt_card *zc;
1232         struct zcrypt_queue *zq;
1233         int card;
1234         u64 cnt;
1235
1236         memset(reqcnt, 0, sizeof(int) * max_adapters);
1237         spin_lock(&zcrypt_list_lock);
1238         local_bh_disable();
1239         for_each_zcrypt_card(zc) {
1240                 for_each_zcrypt_queue(zq, zc) {
1241                         card = AP_QID_CARD(zq->queue->qid);
1242                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index
1243                             || card >= max_adapters)
1244                                 continue;
1245                         spin_lock(&zq->queue->lock);
1246                         cnt = zq->queue->total_request_count;
1247                         spin_unlock(&zq->queue->lock);
1248                         reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX;
1249                 }
1250         }
1251         local_bh_enable();
1252         spin_unlock(&zcrypt_list_lock);
1253 }
1254
1255 static int zcrypt_pendingq_count(void)
1256 {
1257         struct zcrypt_card *zc;
1258         struct zcrypt_queue *zq;
1259         int pendingq_count;
1260
1261         pendingq_count = 0;
1262         spin_lock(&zcrypt_list_lock);
1263         local_bh_disable();
1264         for_each_zcrypt_card(zc) {
1265                 for_each_zcrypt_queue(zq, zc) {
1266                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1267                                 continue;
1268                         spin_lock(&zq->queue->lock);
1269                         pendingq_count += zq->queue->pendingq_count;
1270                         spin_unlock(&zq->queue->lock);
1271                 }
1272         }
1273         local_bh_enable();
1274         spin_unlock(&zcrypt_list_lock);
1275         return pendingq_count;
1276 }
1277
1278 static int zcrypt_requestq_count(void)
1279 {
1280         struct zcrypt_card *zc;
1281         struct zcrypt_queue *zq;
1282         int requestq_count;
1283
1284         requestq_count = 0;
1285         spin_lock(&zcrypt_list_lock);
1286         local_bh_disable();
1287         for_each_zcrypt_card(zc) {
1288                 for_each_zcrypt_queue(zq, zc) {
1289                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1290                                 continue;
1291                         spin_lock(&zq->queue->lock);
1292                         requestq_count += zq->queue->requestq_count;
1293                         spin_unlock(&zq->queue->lock);
1294                 }
1295         }
1296         local_bh_enable();
1297         spin_unlock(&zcrypt_list_lock);
1298         return requestq_count;
1299 }
1300
1301 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
1302                                   unsigned long arg)
1303 {
1304         int rc;
1305         struct ap_perms *perms =
1306                 (struct ap_perms *) filp->private_data;
1307
1308         rc = zcrypt_check_ioctl(perms, cmd);
1309         if (rc)
1310                 return rc;
1311
1312         switch (cmd) {
1313         case ICARSAMODEXPO: {
1314                 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
1315                 struct ica_rsa_modexpo mex;
1316
1317                 if (copy_from_user(&mex, umex, sizeof(mex)))
1318                         return -EFAULT;
1319                 do {
1320                         rc = zcrypt_rsa_modexpo(perms, &mex);
1321                 } while (rc == -EAGAIN);
1322                 /* on failure: retry once again after a requested rescan */
1323                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1324                         do {
1325                                 rc = zcrypt_rsa_modexpo(perms, &mex);
1326                         } while (rc == -EAGAIN);
1327                 if (rc) {
1328                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
1329                         return rc;
1330                 }
1331                 return put_user(mex.outputdatalength, &umex->outputdatalength);
1332         }
1333         case ICARSACRT: {
1334                 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
1335                 struct ica_rsa_modexpo_crt crt;
1336
1337                 if (copy_from_user(&crt, ucrt, sizeof(crt)))
1338                         return -EFAULT;
1339                 do {
1340                         rc = zcrypt_rsa_crt(perms, &crt);
1341                 } while (rc == -EAGAIN);
1342                 /* on failure: retry once again after a requested rescan */
1343                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1344                         do {
1345                                 rc = zcrypt_rsa_crt(perms, &crt);
1346                         } while (rc == -EAGAIN);
1347                 if (rc) {
1348                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
1349                         return rc;
1350                 }
1351                 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
1352         }
1353         case ZSECSENDCPRB: {
1354                 struct ica_xcRB __user *uxcRB = (void __user *) arg;
1355                 struct ica_xcRB xcRB;
1356
1357                 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
1358                         return -EFAULT;
1359                 do {
1360                         rc = _zcrypt_send_cprb(perms, &xcRB);
1361                 } while (rc == -EAGAIN);
1362                 /* on failure: retry once again after a requested rescan */
1363                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1364                         do {
1365                                 rc = _zcrypt_send_cprb(perms, &xcRB);
1366                         } while (rc == -EAGAIN);
1367                 if (rc)
1368                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d status=0x%x\n",
1369                                    rc, xcRB.status);
1370                 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
1371                         return -EFAULT;
1372                 return rc;
1373         }
1374         case ZSENDEP11CPRB: {
1375                 struct ep11_urb __user *uxcrb = (void __user *)arg;
1376                 struct ep11_urb xcrb;
1377
1378                 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
1379                         return -EFAULT;
1380                 do {
1381                         rc = _zcrypt_send_ep11_cprb(perms, &xcrb);
1382                 } while (rc == -EAGAIN);
1383                 /* on failure: retry once again after a requested rescan */
1384                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1385                         do {
1386                                 rc = _zcrypt_send_ep11_cprb(perms, &xcrb);
1387                         } while (rc == -EAGAIN);
1388                 if (rc)
1389                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
1390                 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
1391                         return -EFAULT;
1392                 return rc;
1393         }
1394         case ZCRYPT_DEVICE_STATUS: {
1395                 struct zcrypt_device_status_ext *device_status;
1396                 size_t total_size = MAX_ZDEV_ENTRIES_EXT
1397                         * sizeof(struct zcrypt_device_status_ext);
1398
1399                 device_status = kzalloc(total_size, GFP_KERNEL);
1400                 if (!device_status)
1401                         return -ENOMEM;
1402                 zcrypt_device_status_mask_ext(device_status);
1403                 if (copy_to_user((char __user *) arg, device_status,
1404                                  total_size))
1405                         rc = -EFAULT;
1406                 kfree(device_status);
1407                 return rc;
1408         }
1409         case ZCRYPT_STATUS_MASK: {
1410                 char status[AP_DEVICES];
1411
1412                 zcrypt_status_mask(status, AP_DEVICES);
1413                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1414                         return -EFAULT;
1415                 return 0;
1416         }
1417         case ZCRYPT_QDEPTH_MASK: {
1418                 char qdepth[AP_DEVICES];
1419
1420                 zcrypt_qdepth_mask(qdepth, AP_DEVICES);
1421                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1422                         return -EFAULT;
1423                 return 0;
1424         }
1425         case ZCRYPT_PERDEV_REQCNT: {
1426                 u32 *reqcnt;
1427
1428                 reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL);
1429                 if (!reqcnt)
1430                         return -ENOMEM;
1431                 zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
1432                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1433                         rc = -EFAULT;
1434                 kfree(reqcnt);
1435                 return rc;
1436         }
1437         case Z90STAT_REQUESTQ_COUNT:
1438                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
1439         case Z90STAT_PENDINGQ_COUNT:
1440                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
1441         case Z90STAT_TOTALOPEN_COUNT:
1442                 return put_user(atomic_read(&zcrypt_open_count),
1443                                 (int __user *) arg);
1444         case Z90STAT_DOMAIN_INDEX:
1445                 return put_user(ap_domain_index, (int __user *) arg);
1446         /*
1447          * Deprecated ioctls
1448          */
1449         case ZDEVICESTATUS: {
1450                 /* the old ioctl supports only 64 adapters */
1451                 struct zcrypt_device_status *device_status;
1452                 size_t total_size = MAX_ZDEV_ENTRIES
1453                         * sizeof(struct zcrypt_device_status);
1454
1455                 device_status = kzalloc(total_size, GFP_KERNEL);
1456                 if (!device_status)
1457                         return -ENOMEM;
1458                 zcrypt_device_status_mask(device_status);
1459                 if (copy_to_user((char __user *) arg, device_status,
1460                                  total_size))
1461                         rc = -EFAULT;
1462                 kfree(device_status);
1463                 return rc;
1464         }
1465         case Z90STAT_STATUS_MASK: {
1466                 /* the old ioctl supports only 64 adapters */
1467                 char status[MAX_ZDEV_CARDIDS];
1468
1469                 zcrypt_status_mask(status, MAX_ZDEV_CARDIDS);
1470                 if (copy_to_user((char __user *) arg, status, sizeof(status)))
1471                         return -EFAULT;
1472                 return 0;
1473         }
1474         case Z90STAT_QDEPTH_MASK: {
1475                 /* the old ioctl supports only 64 adapters */
1476                 char qdepth[MAX_ZDEV_CARDIDS];
1477
1478                 zcrypt_qdepth_mask(qdepth, MAX_ZDEV_CARDIDS);
1479                 if (copy_to_user((char __user *) arg, qdepth, sizeof(qdepth)))
1480                         return -EFAULT;
1481                 return 0;
1482         }
1483         case Z90STAT_PERDEV_REQCNT: {
1484                 /* the old ioctl supports only 64 adapters */
1485                 u32 reqcnt[MAX_ZDEV_CARDIDS];
1486
1487                 zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS);
1488                 if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
1489                         return -EFAULT;
1490                 return 0;
1491         }
1492         /* unknown ioctl number */
1493         default:
1494                 ZCRYPT_DBF(DBF_DEBUG, "unknown ioctl 0x%08x\n", cmd);
1495                 return -ENOIOCTLCMD;
1496         }
1497 }
1498
1499 #ifdef CONFIG_COMPAT
1500 /*
1501  * ioctl32 conversion routines
1502  */
1503 struct compat_ica_rsa_modexpo {
1504         compat_uptr_t   inputdata;
1505         unsigned int    inputdatalength;
1506         compat_uptr_t   outputdata;
1507         unsigned int    outputdatalength;
1508         compat_uptr_t   b_key;
1509         compat_uptr_t   n_modulus;
1510 };
1511
1512 static long trans_modexpo32(struct ap_perms *perms, struct file *filp,
1513                             unsigned int cmd, unsigned long arg)
1514 {
1515         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
1516         struct compat_ica_rsa_modexpo mex32;
1517         struct ica_rsa_modexpo mex64;
1518         long rc;
1519
1520         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1521                 return -EFAULT;
1522         mex64.inputdata = compat_ptr(mex32.inputdata);
1523         mex64.inputdatalength = mex32.inputdatalength;
1524         mex64.outputdata = compat_ptr(mex32.outputdata);
1525         mex64.outputdatalength = mex32.outputdatalength;
1526         mex64.b_key = compat_ptr(mex32.b_key);
1527         mex64.n_modulus = compat_ptr(mex32.n_modulus);
1528         do {
1529                 rc = zcrypt_rsa_modexpo(perms, &mex64);
1530         } while (rc == -EAGAIN);
1531         /* on failure: retry once again after a requested rescan */
1532         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1533                 do {
1534                         rc = zcrypt_rsa_modexpo(perms, &mex64);
1535                 } while (rc == -EAGAIN);
1536         if (rc)
1537                 return rc;
1538         return put_user(mex64.outputdatalength,
1539                         &umex32->outputdatalength);
1540 }
1541
1542 struct compat_ica_rsa_modexpo_crt {
1543         compat_uptr_t   inputdata;
1544         unsigned int    inputdatalength;
1545         compat_uptr_t   outputdata;
1546         unsigned int    outputdatalength;
1547         compat_uptr_t   bp_key;
1548         compat_uptr_t   bq_key;
1549         compat_uptr_t   np_prime;
1550         compat_uptr_t   nq_prime;
1551         compat_uptr_t   u_mult_inv;
1552 };
1553
1554 static long trans_modexpo_crt32(struct ap_perms *perms, struct file *filp,
1555                                 unsigned int cmd, unsigned long arg)
1556 {
1557         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1558         struct compat_ica_rsa_modexpo_crt crt32;
1559         struct ica_rsa_modexpo_crt crt64;
1560         long rc;
1561
1562         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1563                 return -EFAULT;
1564         crt64.inputdata = compat_ptr(crt32.inputdata);
1565         crt64.inputdatalength = crt32.inputdatalength;
1566         crt64.outputdata = compat_ptr(crt32.outputdata);
1567         crt64.outputdatalength = crt32.outputdatalength;
1568         crt64.bp_key = compat_ptr(crt32.bp_key);
1569         crt64.bq_key = compat_ptr(crt32.bq_key);
1570         crt64.np_prime = compat_ptr(crt32.np_prime);
1571         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1572         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1573         do {
1574                 rc = zcrypt_rsa_crt(perms, &crt64);
1575         } while (rc == -EAGAIN);
1576         /* on failure: retry once again after a requested rescan */
1577         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1578                 do {
1579                         rc = zcrypt_rsa_crt(perms, &crt64);
1580                 } while (rc == -EAGAIN);
1581         if (rc)
1582                 return rc;
1583         return put_user(crt64.outputdatalength,
1584                         &ucrt32->outputdatalength);
1585 }
1586
1587 struct compat_ica_xcRB {
1588         unsigned short  agent_ID;
1589         unsigned int    user_defined;
1590         unsigned short  request_ID;
1591         unsigned int    request_control_blk_length;
1592         unsigned char   padding1[16 - sizeof(compat_uptr_t)];
1593         compat_uptr_t   request_control_blk_addr;
1594         unsigned int    request_data_length;
1595         char            padding2[16 - sizeof(compat_uptr_t)];
1596         compat_uptr_t   request_data_address;
1597         unsigned int    reply_control_blk_length;
1598         char            padding3[16 - sizeof(compat_uptr_t)];
1599         compat_uptr_t   reply_control_blk_addr;
1600         unsigned int    reply_data_length;
1601         char            padding4[16 - sizeof(compat_uptr_t)];
1602         compat_uptr_t   reply_data_addr;
1603         unsigned short  priority_window;
1604         unsigned int    status;
1605 } __packed;
1606
1607 static long trans_xcRB32(struct ap_perms *perms, struct file *filp,
1608                          unsigned int cmd, unsigned long arg)
1609 {
1610         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1611         struct compat_ica_xcRB xcRB32;
1612         struct ica_xcRB xcRB64;
1613         long rc;
1614
1615         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1616                 return -EFAULT;
1617         xcRB64.agent_ID = xcRB32.agent_ID;
1618         xcRB64.user_defined = xcRB32.user_defined;
1619         xcRB64.request_ID = xcRB32.request_ID;
1620         xcRB64.request_control_blk_length =
1621                 xcRB32.request_control_blk_length;
1622         xcRB64.request_control_blk_addr =
1623                 compat_ptr(xcRB32.request_control_blk_addr);
1624         xcRB64.request_data_length =
1625                 xcRB32.request_data_length;
1626         xcRB64.request_data_address =
1627                 compat_ptr(xcRB32.request_data_address);
1628         xcRB64.reply_control_blk_length =
1629                 xcRB32.reply_control_blk_length;
1630         xcRB64.reply_control_blk_addr =
1631                 compat_ptr(xcRB32.reply_control_blk_addr);
1632         xcRB64.reply_data_length = xcRB32.reply_data_length;
1633         xcRB64.reply_data_addr =
1634                 compat_ptr(xcRB32.reply_data_addr);
1635         xcRB64.priority_window = xcRB32.priority_window;
1636         xcRB64.status = xcRB32.status;
1637         do {
1638                 rc = _zcrypt_send_cprb(perms, &xcRB64);
1639         } while (rc == -EAGAIN);
1640         /* on failure: retry once again after a requested rescan */
1641         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1642                 do {
1643                         rc = _zcrypt_send_cprb(perms, &xcRB64);
1644                 } while (rc == -EAGAIN);
1645         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1646         xcRB32.reply_data_length = xcRB64.reply_data_length;
1647         xcRB32.status = xcRB64.status;
1648         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1649                 return -EFAULT;
1650         return rc;
1651 }
1652
1653 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1654                          unsigned long arg)
1655 {
1656         int rc;
1657         struct ap_perms *perms =
1658                 (struct ap_perms *) filp->private_data;
1659
1660         rc = zcrypt_check_ioctl(perms, cmd);
1661         if (rc)
1662                 return rc;
1663
1664         if (cmd == ICARSAMODEXPO)
1665                 return trans_modexpo32(perms, filp, cmd, arg);
1666         if (cmd == ICARSACRT)
1667                 return trans_modexpo_crt32(perms, filp, cmd, arg);
1668         if (cmd == ZSECSENDCPRB)
1669                 return trans_xcRB32(perms, filp, cmd, arg);
1670         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1671 }
1672 #endif
1673
1674 /*
1675  * Misc device file operations.
1676  */
1677 static const struct file_operations zcrypt_fops = {
1678         .owner          = THIS_MODULE,
1679         .read           = zcrypt_read,
1680         .write          = zcrypt_write,
1681         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1682 #ifdef CONFIG_COMPAT
1683         .compat_ioctl   = zcrypt_compat_ioctl,
1684 #endif
1685         .open           = zcrypt_open,
1686         .release        = zcrypt_release,
1687         .llseek         = no_llseek,
1688 };
1689
1690 /*
1691  * Misc device.
1692  */
1693 static struct miscdevice zcrypt_misc_device = {
1694         .minor      = MISC_DYNAMIC_MINOR,
1695         .name       = "z90crypt",
1696         .fops       = &zcrypt_fops,
1697 };
1698
1699 static int zcrypt_rng_device_count;
1700 static u32 *zcrypt_rng_buffer;
1701 static int zcrypt_rng_buffer_index;
1702 static DEFINE_MUTEX(zcrypt_rng_mutex);
1703
1704 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1705 {
1706         int rc;
1707
1708         /*
1709          * We don't need locking here because the RNG API guarantees serialized
1710          * read method calls.
1711          */
1712         if (zcrypt_rng_buffer_index == 0) {
1713                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1714                 /* on failure: retry once again after a requested rescan */
1715                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1716                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1717                 if (rc < 0)
1718                         return -EIO;
1719                 zcrypt_rng_buffer_index = rc / sizeof(*data);
1720         }
1721         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1722         return sizeof(*data);
1723 }
1724
1725 static struct hwrng zcrypt_rng_dev = {
1726         .name           = "zcrypt",
1727         .data_read      = zcrypt_rng_data_read,
1728         .quality        = 990,
1729 };
1730
1731 int zcrypt_rng_device_add(void)
1732 {
1733         int rc = 0;
1734
1735         mutex_lock(&zcrypt_rng_mutex);
1736         if (zcrypt_rng_device_count == 0) {
1737                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1738                 if (!zcrypt_rng_buffer) {
1739                         rc = -ENOMEM;
1740                         goto out;
1741                 }
1742                 zcrypt_rng_buffer_index = 0;
1743                 if (!zcrypt_hwrng_seed)
1744                         zcrypt_rng_dev.quality = 0;
1745                 rc = hwrng_register(&zcrypt_rng_dev);
1746                 if (rc)
1747                         goto out_free;
1748                 zcrypt_rng_device_count = 1;
1749         } else
1750                 zcrypt_rng_device_count++;
1751         mutex_unlock(&zcrypt_rng_mutex);
1752         return 0;
1753
1754 out_free:
1755         free_page((unsigned long) zcrypt_rng_buffer);
1756 out:
1757         mutex_unlock(&zcrypt_rng_mutex);
1758         return rc;
1759 }
1760
1761 void zcrypt_rng_device_remove(void)
1762 {
1763         mutex_lock(&zcrypt_rng_mutex);
1764         zcrypt_rng_device_count--;
1765         if (zcrypt_rng_device_count == 0) {
1766                 hwrng_unregister(&zcrypt_rng_dev);
1767                 free_page((unsigned long) zcrypt_rng_buffer);
1768         }
1769         mutex_unlock(&zcrypt_rng_mutex);
1770 }
1771
1772 int __init zcrypt_debug_init(void)
1773 {
1774         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1775                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
1776         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1777         debug_set_level(zcrypt_dbf_info, DBF_ERR);
1778
1779         return 0;
1780 }
1781
1782 void zcrypt_debug_exit(void)
1783 {
1784         debug_unregister(zcrypt_dbf_info);
1785 }
1786
1787 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1788
1789 static int __init zcdn_init(void)
1790 {
1791         int rc;
1792
1793         /* create a new class 'zcrypt' */
1794         zcrypt_class = class_create(THIS_MODULE, ZCRYPT_NAME);
1795         if (IS_ERR(zcrypt_class)) {
1796                 rc = PTR_ERR(zcrypt_class);
1797                 goto out_class_create_failed;
1798         }
1799         zcrypt_class->dev_release = zcdn_device_release;
1800
1801         /* alloc device minor range */
1802         rc = alloc_chrdev_region(&zcrypt_devt,
1803                                  0, ZCRYPT_MAX_MINOR_NODES,
1804                                  ZCRYPT_NAME);
1805         if (rc)
1806                 goto out_alloc_chrdev_failed;
1807
1808         cdev_init(&zcrypt_cdev, &zcrypt_fops);
1809         zcrypt_cdev.owner = THIS_MODULE;
1810         rc = cdev_add(&zcrypt_cdev, zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1811         if (rc)
1812                 goto out_cdev_add_failed;
1813
1814         /* need some class specific sysfs attributes */
1815         rc = class_create_file(zcrypt_class, &class_attr_zcdn_create);
1816         if (rc)
1817                 goto out_class_create_file_1_failed;
1818         rc = class_create_file(zcrypt_class, &class_attr_zcdn_destroy);
1819         if (rc)
1820                 goto out_class_create_file_2_failed;
1821
1822         return 0;
1823
1824 out_class_create_file_2_failed:
1825         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1826 out_class_create_file_1_failed:
1827         cdev_del(&zcrypt_cdev);
1828 out_cdev_add_failed:
1829         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1830 out_alloc_chrdev_failed:
1831         class_destroy(zcrypt_class);
1832 out_class_create_failed:
1833         return rc;
1834 }
1835
1836 static void zcdn_exit(void)
1837 {
1838         class_remove_file(zcrypt_class, &class_attr_zcdn_create);
1839         class_remove_file(zcrypt_class, &class_attr_zcdn_destroy);
1840         zcdn_destroy_all();
1841         cdev_del(&zcrypt_cdev);
1842         unregister_chrdev_region(zcrypt_devt, ZCRYPT_MAX_MINOR_NODES);
1843         class_destroy(zcrypt_class);
1844 }
1845
1846 #endif
1847
1848 /**
1849  * zcrypt_api_init(): Module initialization.
1850  *
1851  * The module initialization code.
1852  */
1853 int __init zcrypt_api_init(void)
1854 {
1855         int rc;
1856
1857         rc = zcrypt_debug_init();
1858         if (rc)
1859                 goto out;
1860
1861 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1862         rc = zcdn_init();
1863         if (rc)
1864                 goto out;
1865 #endif
1866
1867         /* Register the request sprayer. */
1868         rc = misc_register(&zcrypt_misc_device);
1869         if (rc < 0)
1870                 goto out_misc_register_failed;
1871
1872         zcrypt_msgtype6_init();
1873         zcrypt_msgtype50_init();
1874
1875         return 0;
1876
1877 out_misc_register_failed:
1878 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1879         zcdn_exit();
1880 #endif
1881         zcrypt_debug_exit();
1882 out:
1883         return rc;
1884 }
1885
1886 /**
1887  * zcrypt_api_exit(): Module termination.
1888  *
1889  * The module termination code.
1890  */
1891 void __exit zcrypt_api_exit(void)
1892 {
1893 #ifdef CONFIG_ZCRYPT_MULTIDEVNODES
1894         zcdn_exit();
1895 #endif
1896         misc_deregister(&zcrypt_misc_device);
1897         zcrypt_msgtype6_exit();
1898         zcrypt_msgtype50_exit();
1899         zcrypt_ccamisc_exit();
1900         zcrypt_ep11misc_exit();
1901         zcrypt_debug_exit();
1902 }
1903
1904 module_init(zcrypt_api_init);
1905 module_exit(zcrypt_api_exit);
This page took 0.140801 seconds and 4 git commands to generate.