Merge tag 'drm-fixes-for-v4.17-rc1' of git://people.freedesktop.org/~airlied/linux
[muen/linux.git] / drivers / s390 / crypto / zcrypt_api.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  *  zcrypt 2.1.0
4  *
5  *  Copyright IBM Corp. 2001, 2012
6  *  Author(s): Robert Burroughs
7  *             Eric Rossman (edrossma@us.ibm.com)
8  *             Cornelia Huck <cornelia.huck@de.ibm.com>
9  *
10  *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
11  *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
12  *                                Ralph Wuerthner <rwuerthn@de.ibm.com>
13  *  MSGTYPE restruct:             Holger Dengler <hd@linux.vnet.ibm.com>
14  */
15
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/interrupt.h>
19 #include <linux/miscdevice.h>
20 #include <linux/fs.h>
21 #include <linux/proc_fs.h>
22 #include <linux/seq_file.h>
23 #include <linux/compat.h>
24 #include <linux/slab.h>
25 #include <linux/atomic.h>
26 #include <linux/uaccess.h>
27 #include <linux/hw_random.h>
28 #include <linux/debugfs.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
40 /*
41  * Module description.
42  */
43 MODULE_AUTHOR("IBM Corporation");
44 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
45                    "Copyright IBM Corp. 2001, 2012");
46 MODULE_LICENSE("GPL");
47
48 /*
49  * zcrypt tracepoint functions
50  */
51 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
52 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
53
54 static int zcrypt_hwrng_seed = 1;
55 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, S_IRUSR|S_IRGRP);
56 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
57
58 DEFINE_SPINLOCK(zcrypt_list_lock);
59 LIST_HEAD(zcrypt_card_list);
60 int zcrypt_device_count;
61
62 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
63 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
64
65 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
66 EXPORT_SYMBOL(zcrypt_rescan_req);
67
68 static LIST_HEAD(zcrypt_ops_list);
69
70 /* Zcrypt related debug feature stuff. */
71 debug_info_t *zcrypt_dbf_info;
72
73 /**
74  * Process a rescan of the transport layer.
75  *
76  * Returns 1, if the rescan has been processed, otherwise 0.
77  */
78 static inline int zcrypt_process_rescan(void)
79 {
80         if (atomic_read(&zcrypt_rescan_req)) {
81                 atomic_set(&zcrypt_rescan_req, 0);
82                 atomic_inc(&zcrypt_rescan_count);
83                 ap_bus_force_rescan();
84                 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
85                            atomic_inc_return(&zcrypt_rescan_count));
86                 return 1;
87         }
88         return 0;
89 }
90
91 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
92 {
93         list_add_tail(&zops->list, &zcrypt_ops_list);
94 }
95
96 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
97 {
98         list_del_init(&zops->list);
99 }
100
101 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
102 {
103         struct zcrypt_ops *zops;
104
105         list_for_each_entry(zops, &zcrypt_ops_list, list)
106                 if ((zops->variant == variant) &&
107                     (!strncmp(zops->name, name, sizeof(zops->name))))
108                         return zops;
109         return NULL;
110 }
111 EXPORT_SYMBOL(zcrypt_msgtype);
112
113 /**
114  * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
115  *
116  * This function is not supported beyond zcrypt 1.3.1.
117  */
118 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
119                            size_t count, loff_t *f_pos)
120 {
121         return -EPERM;
122 }
123
124 /**
125  * zcrypt_write(): Not allowed.
126  *
127  * Write is is not allowed
128  */
129 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
130                             size_t count, loff_t *f_pos)
131 {
132         return -EPERM;
133 }
134
135 /**
136  * zcrypt_open(): Count number of users.
137  *
138  * Device open function to count number of users.
139  */
140 static int zcrypt_open(struct inode *inode, struct file *filp)
141 {
142         atomic_inc(&zcrypt_open_count);
143         return nonseekable_open(inode, filp);
144 }
145
146 /**
147  * zcrypt_release(): Count number of users.
148  *
149  * Device close function to count number of users.
150  */
151 static int zcrypt_release(struct inode *inode, struct file *filp)
152 {
153         atomic_dec(&zcrypt_open_count);
154         return 0;
155 }
156
157 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
158                                                      struct zcrypt_queue *zq,
159                                                      unsigned int weight)
160 {
161         if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
162                 return NULL;
163         zcrypt_queue_get(zq);
164         get_device(&zq->queue->ap_dev.device);
165         atomic_add(weight, &zc->load);
166         atomic_add(weight, &zq->load);
167         zq->request_count++;
168         return zq;
169 }
170
171 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
172                                      struct zcrypt_queue *zq,
173                                      unsigned int weight)
174 {
175         struct module *mod = zq->queue->ap_dev.drv->driver.owner;
176
177         zq->request_count--;
178         atomic_sub(weight, &zc->load);
179         atomic_sub(weight, &zq->load);
180         put_device(&zq->queue->ap_dev.device);
181         zcrypt_queue_put(zq);
182         module_put(mod);
183 }
184
185 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
186                                        struct zcrypt_card *pref_zc,
187                                        unsigned weight, unsigned pref_weight)
188 {
189         if (!pref_zc)
190                 return false;
191         weight += atomic_read(&zc->load);
192         pref_weight += atomic_read(&pref_zc->load);
193         if (weight == pref_weight)
194                 return atomic_read(&zc->card->total_request_count) >
195                         atomic_read(&pref_zc->card->total_request_count);
196         return weight > pref_weight;
197 }
198
199 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
200                                         struct zcrypt_queue *pref_zq,
201                                         unsigned weight, unsigned pref_weight)
202 {
203         if (!pref_zq)
204                 return false;
205         weight += atomic_read(&zq->load);
206         pref_weight += atomic_read(&pref_zq->load);
207         if (weight == pref_weight)
208                 return zq->queue->total_request_count >
209                         pref_zq->queue->total_request_count;
210         return weight > pref_weight;
211 }
212
213 /*
214  * zcrypt ioctls.
215  */
216 static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
217 {
218         struct zcrypt_card *zc, *pref_zc;
219         struct zcrypt_queue *zq, *pref_zq;
220         unsigned int weight, pref_weight;
221         unsigned int func_code;
222         int qid = 0, rc = -ENODEV;
223
224         trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
225
226         if (mex->outputdatalength < mex->inputdatalength) {
227                 rc = -EINVAL;
228                 goto out;
229         }
230
231         /*
232          * As long as outputdatalength is big enough, we can set the
233          * outputdatalength equal to the inputdatalength, since that is the
234          * number of bytes we will copy in any case
235          */
236         mex->outputdatalength = mex->inputdatalength;
237
238         rc = get_rsa_modex_fc(mex, &func_code);
239         if (rc)
240                 goto out;
241
242         pref_zc = NULL;
243         pref_zq = NULL;
244         spin_lock(&zcrypt_list_lock);
245         for_each_zcrypt_card(zc) {
246                 /* Check for online accelarator and CCA cards */
247                 if (!zc->online || !(zc->card->functions & 0x18000000))
248                         continue;
249                 /* Check for size limits */
250                 if (zc->min_mod_size > mex->inputdatalength ||
251                     zc->max_mod_size < mex->inputdatalength)
252                         continue;
253                 /* get weight index of the card device  */
254                 weight = zc->speed_rating[func_code];
255                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
256                         continue;
257                 for_each_zcrypt_queue(zq, zc) {
258                         /* check if device is online and eligible */
259                         if (!zq->online || !zq->ops->rsa_modexpo)
260                                 continue;
261                         if (zcrypt_queue_compare(zq, pref_zq,
262                                                  weight, pref_weight))
263                                 continue;
264                         pref_zc = zc;
265                         pref_zq = zq;
266                         pref_weight = weight;
267                 }
268         }
269         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
270         spin_unlock(&zcrypt_list_lock);
271
272         if (!pref_zq) {
273                 rc = -ENODEV;
274                 goto out;
275         }
276
277         qid = pref_zq->queue->qid;
278         rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
279
280         spin_lock(&zcrypt_list_lock);
281         zcrypt_drop_queue(pref_zc, pref_zq, weight);
282         spin_unlock(&zcrypt_list_lock);
283
284 out:
285         trace_s390_zcrypt_rep(mex, func_code, rc,
286                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
287         return rc;
288 }
289
290 static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
291 {
292         struct zcrypt_card *zc, *pref_zc;
293         struct zcrypt_queue *zq, *pref_zq;
294         unsigned int weight, pref_weight;
295         unsigned int func_code;
296         int qid = 0, rc = -ENODEV;
297
298         trace_s390_zcrypt_req(crt, TP_ICARSACRT);
299
300         if (crt->outputdatalength < crt->inputdatalength) {
301                 rc = -EINVAL;
302                 goto out;
303         }
304
305         /*
306          * As long as outputdatalength is big enough, we can set the
307          * outputdatalength equal to the inputdatalength, since that is the
308          * number of bytes we will copy in any case
309          */
310         crt->outputdatalength = crt->inputdatalength;
311
312         rc = get_rsa_crt_fc(crt, &func_code);
313         if (rc)
314                 goto out;
315
316         pref_zc = NULL;
317         pref_zq = NULL;
318         spin_lock(&zcrypt_list_lock);
319         for_each_zcrypt_card(zc) {
320                 /* Check for online accelarator and CCA cards */
321                 if (!zc->online || !(zc->card->functions & 0x18000000))
322                         continue;
323                 /* Check for size limits */
324                 if (zc->min_mod_size > crt->inputdatalength ||
325                     zc->max_mod_size < crt->inputdatalength)
326                         continue;
327                 /* get weight index of the card device  */
328                 weight = zc->speed_rating[func_code];
329                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
330                         continue;
331                 for_each_zcrypt_queue(zq, zc) {
332                         /* check if device is online and eligible */
333                         if (!zq->online || !zq->ops->rsa_modexpo_crt)
334                                 continue;
335                         if (zcrypt_queue_compare(zq, pref_zq,
336                                                  weight, pref_weight))
337                                 continue;
338                         pref_zc = zc;
339                         pref_zq = zq;
340                         pref_weight = weight;
341                 }
342         }
343         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
344         spin_unlock(&zcrypt_list_lock);
345
346         if (!pref_zq) {
347                 rc = -ENODEV;
348                 goto out;
349         }
350
351         qid = pref_zq->queue->qid;
352         rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
353
354         spin_lock(&zcrypt_list_lock);
355         zcrypt_drop_queue(pref_zc, pref_zq, weight);
356         spin_unlock(&zcrypt_list_lock);
357
358 out:
359         trace_s390_zcrypt_rep(crt, func_code, rc,
360                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
361         return rc;
362 }
363
364 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
365 {
366         struct zcrypt_card *zc, *pref_zc;
367         struct zcrypt_queue *zq, *pref_zq;
368         struct ap_message ap_msg;
369         unsigned int weight, pref_weight;
370         unsigned int func_code;
371         unsigned short *domain;
372         int qid = 0, rc = -ENODEV;
373
374         trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
375
376         rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
377         if (rc)
378                 goto out;
379
380         pref_zc = NULL;
381         pref_zq = NULL;
382         spin_lock(&zcrypt_list_lock);
383         for_each_zcrypt_card(zc) {
384                 /* Check for online CCA cards */
385                 if (!zc->online || !(zc->card->functions & 0x10000000))
386                         continue;
387                 /* Check for user selected CCA card */
388                 if (xcRB->user_defined != AUTOSELECT &&
389                     xcRB->user_defined != zc->card->id)
390                         continue;
391                 /* get weight index of the card device  */
392                 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
393                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
394                         continue;
395                 for_each_zcrypt_queue(zq, zc) {
396                         /* check if device is online and eligible */
397                         if (!zq->online ||
398                             !zq->ops->send_cprb ||
399                             ((*domain != (unsigned short) AUTOSELECT) &&
400                              (*domain != AP_QID_QUEUE(zq->queue->qid))))
401                                 continue;
402                         if (zcrypt_queue_compare(zq, pref_zq,
403                                                  weight, pref_weight))
404                                 continue;
405                         pref_zc = zc;
406                         pref_zq = zq;
407                         pref_weight = weight;
408                 }
409         }
410         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
411         spin_unlock(&zcrypt_list_lock);
412
413         if (!pref_zq) {
414                 rc = -ENODEV;
415                 goto out;
416         }
417
418         /* in case of auto select, provide the correct domain */
419         qid = pref_zq->queue->qid;
420         if (*domain == (unsigned short) AUTOSELECT)
421                 *domain = AP_QID_QUEUE(qid);
422
423         rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
424
425         spin_lock(&zcrypt_list_lock);
426         zcrypt_drop_queue(pref_zc, pref_zq, weight);
427         spin_unlock(&zcrypt_list_lock);
428
429 out:
430         trace_s390_zcrypt_rep(xcRB, func_code, rc,
431                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
432         return rc;
433 }
434 EXPORT_SYMBOL(zcrypt_send_cprb);
435
436 static bool is_desired_ep11_card(unsigned int dev_id,
437                                  unsigned short target_num,
438                                  struct ep11_target_dev *targets)
439 {
440         while (target_num-- > 0) {
441                 if (dev_id == targets->ap_id)
442                         return true;
443                 targets++;
444         }
445         return false;
446 }
447
448 static bool is_desired_ep11_queue(unsigned int dev_qid,
449                                   unsigned short target_num,
450                                   struct ep11_target_dev *targets)
451 {
452         while (target_num-- > 0) {
453                 if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
454                         return true;
455                 targets++;
456         }
457         return false;
458 }
459
460 static long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
461 {
462         struct zcrypt_card *zc, *pref_zc;
463         struct zcrypt_queue *zq, *pref_zq;
464         struct ep11_target_dev *targets;
465         unsigned short target_num;
466         unsigned int weight, pref_weight;
467         unsigned int func_code;
468         struct ap_message ap_msg;
469         int qid = 0, rc = -ENODEV;
470
471         trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
472
473         target_num = (unsigned short) xcrb->targets_num;
474
475         /* empty list indicates autoselect (all available targets) */
476         targets = NULL;
477         if (target_num != 0) {
478                 struct ep11_target_dev __user *uptr;
479
480                 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
481                 if (!targets) {
482                         rc = -ENOMEM;
483                         goto out;
484                 }
485
486                 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
487                 if (copy_from_user(targets, uptr,
488                                    target_num * sizeof(*targets))) {
489                         rc = -EFAULT;
490                         goto out;
491                 }
492         }
493
494         rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
495         if (rc)
496                 goto out_free;
497
498         pref_zc = NULL;
499         pref_zq = NULL;
500         spin_lock(&zcrypt_list_lock);
501         for_each_zcrypt_card(zc) {
502                 /* Check for online EP11 cards */
503                 if (!zc->online || !(zc->card->functions & 0x04000000))
504                         continue;
505                 /* Check for user selected EP11 card */
506                 if (targets &&
507                     !is_desired_ep11_card(zc->card->id, target_num, targets))
508                         continue;
509                 /* get weight index of the card device  */
510                 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
511                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
512                         continue;
513                 for_each_zcrypt_queue(zq, zc) {
514                         /* check if device is online and eligible */
515                         if (!zq->online ||
516                             !zq->ops->send_ep11_cprb ||
517                             (targets &&
518                              !is_desired_ep11_queue(zq->queue->qid,
519                                                     target_num, targets)))
520                                 continue;
521                         if (zcrypt_queue_compare(zq, pref_zq,
522                                                  weight, pref_weight))
523                                 continue;
524                         pref_zc = zc;
525                         pref_zq = zq;
526                         pref_weight = weight;
527                 }
528         }
529         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
530         spin_unlock(&zcrypt_list_lock);
531
532         if (!pref_zq) {
533                 rc = -ENODEV;
534                 goto out_free;
535         }
536
537         qid = pref_zq->queue->qid;
538         rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
539
540         spin_lock(&zcrypt_list_lock);
541         zcrypt_drop_queue(pref_zc, pref_zq, weight);
542         spin_unlock(&zcrypt_list_lock);
543
544 out_free:
545         kfree(targets);
546 out:
547         trace_s390_zcrypt_rep(xcrb, func_code, rc,
548                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
549         return rc;
550 }
551
552 static long zcrypt_rng(char *buffer)
553 {
554         struct zcrypt_card *zc, *pref_zc;
555         struct zcrypt_queue *zq, *pref_zq;
556         unsigned int weight, pref_weight;
557         unsigned int func_code;
558         struct ap_message ap_msg;
559         unsigned int domain;
560         int qid = 0, rc = -ENODEV;
561
562         trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
563
564         rc = get_rng_fc(&ap_msg, &func_code, &domain);
565         if (rc)
566                 goto out;
567
568         pref_zc = NULL;
569         pref_zq = NULL;
570         spin_lock(&zcrypt_list_lock);
571         for_each_zcrypt_card(zc) {
572                 /* Check for online CCA cards */
573                 if (!zc->online || !(zc->card->functions & 0x10000000))
574                         continue;
575                 /* get weight index of the card device  */
576                 weight = zc->speed_rating[func_code];
577                 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
578                         continue;
579                 for_each_zcrypt_queue(zq, zc) {
580                         /* check if device is online and eligible */
581                         if (!zq->online || !zq->ops->rng)
582                                 continue;
583                         if (zcrypt_queue_compare(zq, pref_zq,
584                                                  weight, pref_weight))
585                                 continue;
586                         pref_zc = zc;
587                         pref_zq = zq;
588                         pref_weight = weight;
589                 }
590         }
591         pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
592         spin_unlock(&zcrypt_list_lock);
593
594         if (!pref_zq)
595                 return -ENODEV;
596
597         qid = pref_zq->queue->qid;
598         rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
599
600         spin_lock(&zcrypt_list_lock);
601         zcrypt_drop_queue(pref_zc, pref_zq, weight);
602         spin_unlock(&zcrypt_list_lock);
603
604 out:
605         trace_s390_zcrypt_rep(buffer, func_code, rc,
606                               AP_QID_CARD(qid), AP_QID_QUEUE(qid));
607         return rc;
608 }
609
610 void zcrypt_device_status_mask(struct zcrypt_device_matrix *matrix)
611 {
612         struct zcrypt_card *zc;
613         struct zcrypt_queue *zq;
614         struct zcrypt_device_status *stat;
615
616         memset(matrix, 0, sizeof(*matrix));
617         spin_lock(&zcrypt_list_lock);
618         for_each_zcrypt_card(zc) {
619                 for_each_zcrypt_queue(zq, zc) {
620                         stat = matrix->device;
621                         stat += AP_QID_CARD(zq->queue->qid) * MAX_ZDEV_DOMAINS;
622                         stat += AP_QID_QUEUE(zq->queue->qid);
623                         stat->hwtype = zc->card->ap_dev.device_type;
624                         stat->functions = zc->card->functions >> 26;
625                         stat->qid = zq->queue->qid;
626                         stat->online = zq->online ? 0x01 : 0x00;
627                 }
628         }
629         spin_unlock(&zcrypt_list_lock);
630 }
631 EXPORT_SYMBOL(zcrypt_device_status_mask);
632
633 static void zcrypt_status_mask(char status[AP_DEVICES])
634 {
635         struct zcrypt_card *zc;
636         struct zcrypt_queue *zq;
637
638         memset(status, 0, sizeof(char) * AP_DEVICES);
639         spin_lock(&zcrypt_list_lock);
640         for_each_zcrypt_card(zc) {
641                 for_each_zcrypt_queue(zq, zc) {
642                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
643                                 continue;
644                         status[AP_QID_CARD(zq->queue->qid)] =
645                                 zc->online ? zc->user_space_type : 0x0d;
646                 }
647         }
648         spin_unlock(&zcrypt_list_lock);
649 }
650
651 static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES])
652 {
653         struct zcrypt_card *zc;
654         struct zcrypt_queue *zq;
655
656         memset(qdepth, 0, sizeof(char)  * AP_DEVICES);
657         spin_lock(&zcrypt_list_lock);
658         local_bh_disable();
659         for_each_zcrypt_card(zc) {
660                 for_each_zcrypt_queue(zq, zc) {
661                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
662                                 continue;
663                         spin_lock(&zq->queue->lock);
664                         qdepth[AP_QID_CARD(zq->queue->qid)] =
665                                 zq->queue->pendingq_count +
666                                 zq->queue->requestq_count;
667                         spin_unlock(&zq->queue->lock);
668                 }
669         }
670         local_bh_enable();
671         spin_unlock(&zcrypt_list_lock);
672 }
673
674 static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES])
675 {
676         struct zcrypt_card *zc;
677         struct zcrypt_queue *zq;
678
679         memset(reqcnt, 0, sizeof(int) * AP_DEVICES);
680         spin_lock(&zcrypt_list_lock);
681         local_bh_disable();
682         for_each_zcrypt_card(zc) {
683                 for_each_zcrypt_queue(zq, zc) {
684                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
685                                 continue;
686                         spin_lock(&zq->queue->lock);
687                         reqcnt[AP_QID_CARD(zq->queue->qid)] =
688                                 zq->queue->total_request_count;
689                         spin_unlock(&zq->queue->lock);
690                 }
691         }
692         local_bh_enable();
693         spin_unlock(&zcrypt_list_lock);
694 }
695
696 static int zcrypt_pendingq_count(void)
697 {
698         struct zcrypt_card *zc;
699         struct zcrypt_queue *zq;
700         int pendingq_count;
701
702         pendingq_count = 0;
703         spin_lock(&zcrypt_list_lock);
704         local_bh_disable();
705         for_each_zcrypt_card(zc) {
706                 for_each_zcrypt_queue(zq, zc) {
707                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
708                                 continue;
709                         spin_lock(&zq->queue->lock);
710                         pendingq_count += zq->queue->pendingq_count;
711                         spin_unlock(&zq->queue->lock);
712                 }
713         }
714         local_bh_enable();
715         spin_unlock(&zcrypt_list_lock);
716         return pendingq_count;
717 }
718
719 static int zcrypt_requestq_count(void)
720 {
721         struct zcrypt_card *zc;
722         struct zcrypt_queue *zq;
723         int requestq_count;
724
725         requestq_count = 0;
726         spin_lock(&zcrypt_list_lock);
727         local_bh_disable();
728         for_each_zcrypt_card(zc) {
729                 for_each_zcrypt_queue(zq, zc) {
730                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
731                                 continue;
732                         spin_lock(&zq->queue->lock);
733                         requestq_count += zq->queue->requestq_count;
734                         spin_unlock(&zq->queue->lock);
735                 }
736         }
737         local_bh_enable();
738         spin_unlock(&zcrypt_list_lock);
739         return requestq_count;
740 }
741
742 static int zcrypt_count_type(int type)
743 {
744         struct zcrypt_card *zc;
745         struct zcrypt_queue *zq;
746         int device_count;
747
748         device_count = 0;
749         spin_lock(&zcrypt_list_lock);
750         for_each_zcrypt_card(zc) {
751                 if (zc->card->id != type)
752                         continue;
753                 for_each_zcrypt_queue(zq, zc) {
754                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
755                                 continue;
756                         device_count++;
757                 }
758         }
759         spin_unlock(&zcrypt_list_lock);
760         return device_count;
761 }
762
763 /**
764  * zcrypt_ica_status(): Old, depracted combi status call.
765  *
766  * Old, deprecated combi status call.
767  */
768 static long zcrypt_ica_status(struct file *filp, unsigned long arg)
769 {
770         struct ica_z90_status *pstat;
771         int ret;
772
773         pstat = kzalloc(sizeof(*pstat), GFP_KERNEL);
774         if (!pstat)
775                 return -ENOMEM;
776         pstat->totalcount = zcrypt_device_count;
777         pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA);
778         pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC);
779         pstat->requestqWaitCount = zcrypt_requestq_count();
780         pstat->pendingqWaitCount = zcrypt_pendingq_count();
781         pstat->totalOpenCount = atomic_read(&zcrypt_open_count);
782         pstat->cryptoDomain = ap_domain_index;
783         zcrypt_status_mask(pstat->status);
784         zcrypt_qdepth_mask(pstat->qdepth);
785         ret = 0;
786         if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat)))
787                 ret = -EFAULT;
788         kfree(pstat);
789         return ret;
790 }
791
792 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
793                                   unsigned long arg)
794 {
795         int rc;
796
797         switch (cmd) {
798         case ICARSAMODEXPO: {
799                 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
800                 struct ica_rsa_modexpo mex;
801                 if (copy_from_user(&mex, umex, sizeof(mex)))
802                         return -EFAULT;
803                 do {
804                         rc = zcrypt_rsa_modexpo(&mex);
805                 } while (rc == -EAGAIN);
806                 /* on failure: retry once again after a requested rescan */
807                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
808                         do {
809                                 rc = zcrypt_rsa_modexpo(&mex);
810                         } while (rc == -EAGAIN);
811                 if (rc) {
812                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
813                         return rc;
814                 }
815                 return put_user(mex.outputdatalength, &umex->outputdatalength);
816         }
817         case ICARSACRT: {
818                 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
819                 struct ica_rsa_modexpo_crt crt;
820                 if (copy_from_user(&crt, ucrt, sizeof(crt)))
821                         return -EFAULT;
822                 do {
823                         rc = zcrypt_rsa_crt(&crt);
824                 } while (rc == -EAGAIN);
825                 /* on failure: retry once again after a requested rescan */
826                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
827                         do {
828                                 rc = zcrypt_rsa_crt(&crt);
829                         } while (rc == -EAGAIN);
830                 if (rc) {
831                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
832                         return rc;
833                 }
834                 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
835         }
836         case ZSECSENDCPRB: {
837                 struct ica_xcRB __user *uxcRB = (void __user *) arg;
838                 struct ica_xcRB xcRB;
839                 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
840                         return -EFAULT;
841                 do {
842                         rc = zcrypt_send_cprb(&xcRB);
843                 } while (rc == -EAGAIN);
844                 /* on failure: retry once again after a requested rescan */
845                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
846                         do {
847                                 rc = zcrypt_send_cprb(&xcRB);
848                         } while (rc == -EAGAIN);
849                 if (rc)
850                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d\n", rc);
851                 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
852                         return -EFAULT;
853                 return rc;
854         }
855         case ZSENDEP11CPRB: {
856                 struct ep11_urb __user *uxcrb = (void __user *)arg;
857                 struct ep11_urb xcrb;
858                 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
859                         return -EFAULT;
860                 do {
861                         rc = zcrypt_send_ep11_cprb(&xcrb);
862                 } while (rc == -EAGAIN);
863                 /* on failure: retry once again after a requested rescan */
864                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
865                         do {
866                                 rc = zcrypt_send_ep11_cprb(&xcrb);
867                         } while (rc == -EAGAIN);
868                 if (rc)
869                         ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
870                 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
871                         return -EFAULT;
872                 return rc;
873         }
874         case ZDEVICESTATUS: {
875                 struct zcrypt_device_matrix *device_status;
876
877                 device_status = kzalloc(sizeof(struct zcrypt_device_matrix),
878                                         GFP_KERNEL);
879                 if (!device_status)
880                         return -ENOMEM;
881
882                 zcrypt_device_status_mask(device_status);
883
884                 if (copy_to_user((char __user *) arg, device_status,
885                                  sizeof(struct zcrypt_device_matrix))) {
886                         kfree(device_status);
887                         return -EFAULT;
888                 }
889
890                 kfree(device_status);
891                 return 0;
892         }
893         case Z90STAT_STATUS_MASK: {
894                 char status[AP_DEVICES];
895                 zcrypt_status_mask(status);
896                 if (copy_to_user((char __user *) arg, status,
897                                  sizeof(char) * AP_DEVICES))
898                         return -EFAULT;
899                 return 0;
900         }
901         case Z90STAT_QDEPTH_MASK: {
902                 char qdepth[AP_DEVICES];
903                 zcrypt_qdepth_mask(qdepth);
904                 if (copy_to_user((char __user *) arg, qdepth,
905                                  sizeof(char) * AP_DEVICES))
906                         return -EFAULT;
907                 return 0;
908         }
909         case Z90STAT_PERDEV_REQCNT: {
910                 int reqcnt[AP_DEVICES];
911                 zcrypt_perdev_reqcnt(reqcnt);
912                 if (copy_to_user((int __user *) arg, reqcnt,
913                                  sizeof(int) * AP_DEVICES))
914                         return -EFAULT;
915                 return 0;
916         }
917         case Z90STAT_REQUESTQ_COUNT:
918                 return put_user(zcrypt_requestq_count(), (int __user *) arg);
919         case Z90STAT_PENDINGQ_COUNT:
920                 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
921         case Z90STAT_TOTALOPEN_COUNT:
922                 return put_user(atomic_read(&zcrypt_open_count),
923                                 (int __user *) arg);
924         case Z90STAT_DOMAIN_INDEX:
925                 return put_user(ap_domain_index, (int __user *) arg);
926         /*
927          * Deprecated ioctls. Don't add another device count ioctl,
928          * you can count them yourself in the user space with the
929          * output of the Z90STAT_STATUS_MASK ioctl.
930          */
931         case ICAZ90STATUS:
932                 return zcrypt_ica_status(filp, arg);
933         case Z90STAT_TOTALCOUNT:
934                 return put_user(zcrypt_device_count, (int __user *) arg);
935         case Z90STAT_PCICACOUNT:
936                 return put_user(zcrypt_count_type(ZCRYPT_PCICA),
937                                 (int __user *) arg);
938         case Z90STAT_PCICCCOUNT:
939                 return put_user(zcrypt_count_type(ZCRYPT_PCICC),
940                                 (int __user *) arg);
941         case Z90STAT_PCIXCCMCL2COUNT:
942                 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2),
943                                 (int __user *) arg);
944         case Z90STAT_PCIXCCMCL3COUNT:
945                 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
946                                 (int __user *) arg);
947         case Z90STAT_PCIXCCCOUNT:
948                 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) +
949                                 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
950                                 (int __user *) arg);
951         case Z90STAT_CEX2CCOUNT:
952                 return put_user(zcrypt_count_type(ZCRYPT_CEX2C),
953                                 (int __user *) arg);
954         case Z90STAT_CEX2ACOUNT:
955                 return put_user(zcrypt_count_type(ZCRYPT_CEX2A),
956                                 (int __user *) arg);
957         default:
958                 /* unknown ioctl number */
959                 return -ENOIOCTLCMD;
960         }
961 }
962
963 #ifdef CONFIG_COMPAT
964 /*
965  * ioctl32 conversion routines
966  */
967 struct compat_ica_rsa_modexpo {
968         compat_uptr_t   inputdata;
969         unsigned int    inputdatalength;
970         compat_uptr_t   outputdata;
971         unsigned int    outputdatalength;
972         compat_uptr_t   b_key;
973         compat_uptr_t   n_modulus;
974 };
975
976 static long trans_modexpo32(struct file *filp, unsigned int cmd,
977                             unsigned long arg)
978 {
979         struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
980         struct compat_ica_rsa_modexpo mex32;
981         struct ica_rsa_modexpo mex64;
982         long rc;
983
984         if (copy_from_user(&mex32, umex32, sizeof(mex32)))
985                 return -EFAULT;
986         mex64.inputdata = compat_ptr(mex32.inputdata);
987         mex64.inputdatalength = mex32.inputdatalength;
988         mex64.outputdata = compat_ptr(mex32.outputdata);
989         mex64.outputdatalength = mex32.outputdatalength;
990         mex64.b_key = compat_ptr(mex32.b_key);
991         mex64.n_modulus = compat_ptr(mex32.n_modulus);
992         do {
993                 rc = zcrypt_rsa_modexpo(&mex64);
994         } while (rc == -EAGAIN);
995         /* on failure: retry once again after a requested rescan */
996         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
997                 do {
998                         rc = zcrypt_rsa_modexpo(&mex64);
999                 } while (rc == -EAGAIN);
1000         if (rc)
1001                 return rc;
1002         return put_user(mex64.outputdatalength,
1003                         &umex32->outputdatalength);
1004 }
1005
1006 struct compat_ica_rsa_modexpo_crt {
1007         compat_uptr_t   inputdata;
1008         unsigned int    inputdatalength;
1009         compat_uptr_t   outputdata;
1010         unsigned int    outputdatalength;
1011         compat_uptr_t   bp_key;
1012         compat_uptr_t   bq_key;
1013         compat_uptr_t   np_prime;
1014         compat_uptr_t   nq_prime;
1015         compat_uptr_t   u_mult_inv;
1016 };
1017
1018 static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
1019                                 unsigned long arg)
1020 {
1021         struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1022         struct compat_ica_rsa_modexpo_crt crt32;
1023         struct ica_rsa_modexpo_crt crt64;
1024         long rc;
1025
1026         if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1027                 return -EFAULT;
1028         crt64.inputdata = compat_ptr(crt32.inputdata);
1029         crt64.inputdatalength = crt32.inputdatalength;
1030         crt64.outputdata=  compat_ptr(crt32.outputdata);
1031         crt64.outputdatalength = crt32.outputdatalength;
1032         crt64.bp_key = compat_ptr(crt32.bp_key);
1033         crt64.bq_key = compat_ptr(crt32.bq_key);
1034         crt64.np_prime = compat_ptr(crt32.np_prime);
1035         crt64.nq_prime = compat_ptr(crt32.nq_prime);
1036         crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1037         do {
1038                 rc = zcrypt_rsa_crt(&crt64);
1039         } while (rc == -EAGAIN);
1040         /* on failure: retry once again after a requested rescan */
1041         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1042                 do {
1043                         rc = zcrypt_rsa_crt(&crt64);
1044                 } while (rc == -EAGAIN);
1045         if (rc)
1046                 return rc;
1047         return put_user(crt64.outputdatalength,
1048                         &ucrt32->outputdatalength);
1049 }
1050
1051 struct compat_ica_xcRB {
1052         unsigned short  agent_ID;
1053         unsigned int    user_defined;
1054         unsigned short  request_ID;
1055         unsigned int    request_control_blk_length;
1056         unsigned char   padding1[16 - sizeof (compat_uptr_t)];
1057         compat_uptr_t   request_control_blk_addr;
1058         unsigned int    request_data_length;
1059         char            padding2[16 - sizeof (compat_uptr_t)];
1060         compat_uptr_t   request_data_address;
1061         unsigned int    reply_control_blk_length;
1062         char            padding3[16 - sizeof (compat_uptr_t)];
1063         compat_uptr_t   reply_control_blk_addr;
1064         unsigned int    reply_data_length;
1065         char            padding4[16 - sizeof (compat_uptr_t)];
1066         compat_uptr_t   reply_data_addr;
1067         unsigned short  priority_window;
1068         unsigned int    status;
1069 } __attribute__((packed));
1070
1071 static long trans_xcRB32(struct file *filp, unsigned int cmd,
1072                          unsigned long arg)
1073 {
1074         struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1075         struct compat_ica_xcRB xcRB32;
1076         struct ica_xcRB xcRB64;
1077         long rc;
1078
1079         if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1080                 return -EFAULT;
1081         xcRB64.agent_ID = xcRB32.agent_ID;
1082         xcRB64.user_defined = xcRB32.user_defined;
1083         xcRB64.request_ID = xcRB32.request_ID;
1084         xcRB64.request_control_blk_length =
1085                 xcRB32.request_control_blk_length;
1086         xcRB64.request_control_blk_addr =
1087                 compat_ptr(xcRB32.request_control_blk_addr);
1088         xcRB64.request_data_length =
1089                 xcRB32.request_data_length;
1090         xcRB64.request_data_address =
1091                 compat_ptr(xcRB32.request_data_address);
1092         xcRB64.reply_control_blk_length =
1093                 xcRB32.reply_control_blk_length;
1094         xcRB64.reply_control_blk_addr =
1095                 compat_ptr(xcRB32.reply_control_blk_addr);
1096         xcRB64.reply_data_length = xcRB32.reply_data_length;
1097         xcRB64.reply_data_addr =
1098                 compat_ptr(xcRB32.reply_data_addr);
1099         xcRB64.priority_window = xcRB32.priority_window;
1100         xcRB64.status = xcRB32.status;
1101         do {
1102                 rc = zcrypt_send_cprb(&xcRB64);
1103         } while (rc == -EAGAIN);
1104         /* on failure: retry once again after a requested rescan */
1105         if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1106                 do {
1107                         rc = zcrypt_send_cprb(&xcRB64);
1108                 } while (rc == -EAGAIN);
1109         xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1110         xcRB32.reply_data_length = xcRB64.reply_data_length;
1111         xcRB32.status = xcRB64.status;
1112         if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1113                         return -EFAULT;
1114         return rc;
1115 }
1116
1117 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1118                          unsigned long arg)
1119 {
1120         if (cmd == ICARSAMODEXPO)
1121                 return trans_modexpo32(filp, cmd, arg);
1122         if (cmd == ICARSACRT)
1123                 return trans_modexpo_crt32(filp, cmd, arg);
1124         if (cmd == ZSECSENDCPRB)
1125                 return trans_xcRB32(filp, cmd, arg);
1126         return zcrypt_unlocked_ioctl(filp, cmd, arg);
1127 }
1128 #endif
1129
1130 /*
1131  * Misc device file operations.
1132  */
1133 static const struct file_operations zcrypt_fops = {
1134         .owner          = THIS_MODULE,
1135         .read           = zcrypt_read,
1136         .write          = zcrypt_write,
1137         .unlocked_ioctl = zcrypt_unlocked_ioctl,
1138 #ifdef CONFIG_COMPAT
1139         .compat_ioctl   = zcrypt_compat_ioctl,
1140 #endif
1141         .open           = zcrypt_open,
1142         .release        = zcrypt_release,
1143         .llseek         = no_llseek,
1144 };
1145
1146 /*
1147  * Misc device.
1148  */
1149 static struct miscdevice zcrypt_misc_device = {
1150         .minor      = MISC_DYNAMIC_MINOR,
1151         .name       = "z90crypt",
1152         .fops       = &zcrypt_fops,
1153 };
1154
1155 /*
1156  * Deprecated /proc entry support.
1157  */
1158 static struct proc_dir_entry *zcrypt_entry;
1159
1160 static void sprintcl(struct seq_file *m, unsigned char *addr, unsigned int len)
1161 {
1162         int i;
1163
1164         for (i = 0; i < len; i++)
1165                 seq_printf(m, "%01x", (unsigned int) addr[i]);
1166         seq_putc(m, ' ');
1167 }
1168
1169 static void sprintrw(struct seq_file *m, unsigned char *addr, unsigned int len)
1170 {
1171         int inl, c, cx;
1172
1173         seq_printf(m, "    ");
1174         inl = 0;
1175         for (c = 0; c < (len / 16); c++) {
1176                 sprintcl(m, addr+inl, 16);
1177                 inl += 16;
1178         }
1179         cx = len%16;
1180         if (cx) {
1181                 sprintcl(m, addr+inl, cx);
1182                 inl += cx;
1183         }
1184         seq_putc(m, '\n');
1185 }
1186
1187 static void sprinthx(unsigned char *title, struct seq_file *m,
1188                      unsigned char *addr, unsigned int len)
1189 {
1190         int inl, r, rx;
1191
1192         seq_printf(m, "\n%s\n", title);
1193         inl = 0;
1194         for (r = 0; r < (len / 64); r++) {
1195                 sprintrw(m, addr+inl, 64);
1196                 inl += 64;
1197         }
1198         rx = len % 64;
1199         if (rx) {
1200                 sprintrw(m, addr+inl, rx);
1201                 inl += rx;
1202         }
1203         seq_putc(m, '\n');
1204 }
1205
1206 static void sprinthx4(unsigned char *title, struct seq_file *m,
1207                       unsigned int *array, unsigned int len)
1208 {
1209         seq_printf(m, "\n%s\n", title);
1210         seq_hex_dump(m, "    ", DUMP_PREFIX_NONE, 32, 4, array, len, false);
1211         seq_putc(m, '\n');
1212 }
1213
1214 static int zcrypt_proc_show(struct seq_file *m, void *v)
1215 {
1216         char workarea[sizeof(int) * AP_DEVICES];
1217
1218         seq_printf(m, "\nzcrypt version: %d.%d.%d\n",
1219                    ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT);
1220         seq_printf(m, "Cryptographic domain: %d\n", ap_domain_index);
1221         seq_printf(m, "Total device count: %d\n", zcrypt_device_count);
1222         seq_printf(m, "PCICA count: %d\n", zcrypt_count_type(ZCRYPT_PCICA));
1223         seq_printf(m, "PCICC count: %d\n", zcrypt_count_type(ZCRYPT_PCICC));
1224         seq_printf(m, "PCIXCC MCL2 count: %d\n",
1225                    zcrypt_count_type(ZCRYPT_PCIXCC_MCL2));
1226         seq_printf(m, "PCIXCC MCL3 count: %d\n",
1227                    zcrypt_count_type(ZCRYPT_PCIXCC_MCL3));
1228         seq_printf(m, "CEX2C count: %d\n", zcrypt_count_type(ZCRYPT_CEX2C));
1229         seq_printf(m, "CEX2A count: %d\n", zcrypt_count_type(ZCRYPT_CEX2A));
1230         seq_printf(m, "CEX3C count: %d\n", zcrypt_count_type(ZCRYPT_CEX3C));
1231         seq_printf(m, "CEX3A count: %d\n", zcrypt_count_type(ZCRYPT_CEX3A));
1232         seq_printf(m, "requestq count: %d\n", zcrypt_requestq_count());
1233         seq_printf(m, "pendingq count: %d\n", zcrypt_pendingq_count());
1234         seq_printf(m, "Total open handles: %d\n\n",
1235                    atomic_read(&zcrypt_open_count));
1236         zcrypt_status_mask(workarea);
1237         sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) "
1238                  "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A",
1239                  m, workarea, AP_DEVICES);
1240         zcrypt_qdepth_mask(workarea);
1241         sprinthx("Waiting work element counts", m, workarea, AP_DEVICES);
1242         zcrypt_perdev_reqcnt((int *) workarea);
1243         sprinthx4("Per-device successfully completed request counts",
1244                   m, (unsigned int *) workarea, AP_DEVICES);
1245         return 0;
1246 }
1247
1248 static int zcrypt_proc_open(struct inode *inode, struct file *file)
1249 {
1250         return single_open(file, zcrypt_proc_show, NULL);
1251 }
1252
1253 static void zcrypt_disable_card(int index)
1254 {
1255         struct zcrypt_card *zc;
1256         struct zcrypt_queue *zq;
1257
1258         spin_lock(&zcrypt_list_lock);
1259         for_each_zcrypt_card(zc) {
1260                 for_each_zcrypt_queue(zq, zc) {
1261                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1262                                 continue;
1263                         zq->online = 0;
1264                         ap_flush_queue(zq->queue);
1265                 }
1266         }
1267         spin_unlock(&zcrypt_list_lock);
1268 }
1269
1270 static void zcrypt_enable_card(int index)
1271 {
1272         struct zcrypt_card *zc;
1273         struct zcrypt_queue *zq;
1274
1275         spin_lock(&zcrypt_list_lock);
1276         for_each_zcrypt_card(zc) {
1277                 for_each_zcrypt_queue(zq, zc) {
1278                         if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1279                                 continue;
1280                         zq->online = 1;
1281                         ap_flush_queue(zq->queue);
1282                 }
1283         }
1284         spin_unlock(&zcrypt_list_lock);
1285 }
1286
1287 static ssize_t zcrypt_proc_write(struct file *file, const char __user *buffer,
1288                                  size_t count, loff_t *pos)
1289 {
1290         unsigned char *lbuf, *ptr;
1291         size_t local_count;
1292         int j;
1293
1294         if (count <= 0)
1295                 return 0;
1296
1297 #define LBUFSIZE 1200UL
1298         lbuf = kmalloc(LBUFSIZE, GFP_KERNEL);
1299         if (!lbuf)
1300                 return 0;
1301
1302         local_count = min(LBUFSIZE - 1, count);
1303         if (copy_from_user(lbuf, buffer, local_count) != 0) {
1304                 kfree(lbuf);
1305                 return -EFAULT;
1306         }
1307         lbuf[local_count] = '\0';
1308
1309         ptr = strstr(lbuf, "Online devices");
1310         if (!ptr)
1311                 goto out;
1312         ptr = strstr(ptr, "\n");
1313         if (!ptr)
1314                 goto out;
1315         ptr++;
1316
1317         if (strstr(ptr, "Waiting work element counts") == NULL)
1318                 goto out;
1319
1320         for (j = 0; j < 64 && *ptr; ptr++) {
1321                 /*
1322                  * '0' for no device, '1' for PCICA, '2' for PCICC,
1323                  * '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3,
1324                  * '5' for CEX2C and '6' for CEX2A'
1325                  * '7' for CEX3C and '8' for CEX3A
1326                  */
1327                 if (*ptr >= '0' && *ptr <= '8')
1328                         j++;
1329                 else if (*ptr == 'd' || *ptr == 'D')
1330                         zcrypt_disable_card(j++);
1331                 else if (*ptr == 'e' || *ptr == 'E')
1332                         zcrypt_enable_card(j++);
1333                 else if (*ptr != ' ' && *ptr != '\t')
1334                         break;
1335         }
1336 out:
1337         kfree(lbuf);
1338         return count;
1339 }
1340
1341 static const struct file_operations zcrypt_proc_fops = {
1342         .owner          = THIS_MODULE,
1343         .open           = zcrypt_proc_open,
1344         .read           = seq_read,
1345         .llseek         = seq_lseek,
1346         .release        = single_release,
1347         .write          = zcrypt_proc_write,
1348 };
1349
1350 static int zcrypt_rng_device_count;
1351 static u32 *zcrypt_rng_buffer;
1352 static int zcrypt_rng_buffer_index;
1353 static DEFINE_MUTEX(zcrypt_rng_mutex);
1354
1355 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1356 {
1357         int rc;
1358
1359         /*
1360          * We don't need locking here because the RNG API guarantees serialized
1361          * read method calls.
1362          */
1363         if (zcrypt_rng_buffer_index == 0) {
1364                 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1365                 /* on failure: retry once again after a requested rescan */
1366                 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1367                         rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1368                 if (rc < 0)
1369                         return -EIO;
1370                 zcrypt_rng_buffer_index = rc / sizeof *data;
1371         }
1372         *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1373         return sizeof *data;
1374 }
1375
1376 static struct hwrng zcrypt_rng_dev = {
1377         .name           = "zcrypt",
1378         .data_read      = zcrypt_rng_data_read,
1379         .quality        = 990,
1380 };
1381
1382 int zcrypt_rng_device_add(void)
1383 {
1384         int rc = 0;
1385
1386         mutex_lock(&zcrypt_rng_mutex);
1387         if (zcrypt_rng_device_count == 0) {
1388                 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1389                 if (!zcrypt_rng_buffer) {
1390                         rc = -ENOMEM;
1391                         goto out;
1392                 }
1393                 zcrypt_rng_buffer_index = 0;
1394                 if (!zcrypt_hwrng_seed)
1395                         zcrypt_rng_dev.quality = 0;
1396                 rc = hwrng_register(&zcrypt_rng_dev);
1397                 if (rc)
1398                         goto out_free;
1399                 zcrypt_rng_device_count = 1;
1400         } else
1401                 zcrypt_rng_device_count++;
1402         mutex_unlock(&zcrypt_rng_mutex);
1403         return 0;
1404
1405 out_free:
1406         free_page((unsigned long) zcrypt_rng_buffer);
1407 out:
1408         mutex_unlock(&zcrypt_rng_mutex);
1409         return rc;
1410 }
1411
1412 void zcrypt_rng_device_remove(void)
1413 {
1414         mutex_lock(&zcrypt_rng_mutex);
1415         zcrypt_rng_device_count--;
1416         if (zcrypt_rng_device_count == 0) {
1417                 hwrng_unregister(&zcrypt_rng_dev);
1418                 free_page((unsigned long) zcrypt_rng_buffer);
1419         }
1420         mutex_unlock(&zcrypt_rng_mutex);
1421 }
1422
1423 int __init zcrypt_debug_init(void)
1424 {
1425         zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1426                                          DBF_MAX_SPRINTF_ARGS * sizeof(long));
1427         debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1428         debug_set_level(zcrypt_dbf_info, DBF_ERR);
1429
1430         return 0;
1431 }
1432
1433 void zcrypt_debug_exit(void)
1434 {
1435         debug_unregister(zcrypt_dbf_info);
1436 }
1437
1438 /**
1439  * zcrypt_api_init(): Module initialization.
1440  *
1441  * The module initialization code.
1442  */
1443 int __init zcrypt_api_init(void)
1444 {
1445         int rc;
1446
1447         rc = zcrypt_debug_init();
1448         if (rc)
1449                 goto out;
1450
1451         atomic_set(&zcrypt_rescan_req, 0);
1452
1453         /* Register the request sprayer. */
1454         rc = misc_register(&zcrypt_misc_device);
1455         if (rc < 0)
1456                 goto out;
1457
1458         /* Set up the proc file system */
1459         zcrypt_entry = proc_create("driver/z90crypt", 0644, NULL,
1460                                    &zcrypt_proc_fops);
1461         if (!zcrypt_entry) {
1462                 rc = -ENOMEM;
1463                 goto out_misc;
1464         }
1465
1466         zcrypt_msgtype6_init();
1467         zcrypt_msgtype50_init();
1468         return 0;
1469
1470 out_misc:
1471         misc_deregister(&zcrypt_misc_device);
1472 out:
1473         return rc;
1474 }
1475
1476 /**
1477  * zcrypt_api_exit(): Module termination.
1478  *
1479  * The module termination code.
1480  */
1481 void __exit zcrypt_api_exit(void)
1482 {
1483         remove_proc_entry("driver/z90crypt", NULL);
1484         misc_deregister(&zcrypt_misc_device);
1485         zcrypt_msgtype6_exit();
1486         zcrypt_msgtype50_exit();
1487         zcrypt_debug_exit();
1488 }
1489
1490 module_init(zcrypt_api_init);
1491 module_exit(zcrypt_api_exit);