1 /*
2 * zcrypt 2.1.0
3 *
4 * Copyright IBM Corp. 2001, 2012
5 * Author(s): Robert Burroughs
6 * Eric Rossman (edrossma@us.ibm.com)
7 * Cornelia Huck <cornelia.huck@de.ibm.com>
8 *
9 * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
10 * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
11 * Ralph Wuerthner <rwuerthn@de.ibm.com>
12 * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com>
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
17 * any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 */
28
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/interrupt.h>
32 #include <linux/miscdevice.h>
33 #include <linux/fs.h>
34 #include <linux/proc_fs.h>
35 #include <linux/seq_file.h>
36 #include <linux/compat.h>
37 #include <linux/slab.h>
38 #include <linux/atomic.h>
39 #include <linux/uaccess.h>
40 #include <linux/hw_random.h>
41 #include <linux/debugfs.h>
42 #include <asm/debug.h>
43
44 #define CREATE_TRACE_POINTS
45 #include <asm/trace/zcrypt.h>
46
47 #include "zcrypt_api.h"
48 #include "zcrypt_debug.h"
49
50 #include "zcrypt_msgtype6.h"
51 #include "zcrypt_msgtype50.h"
52
53 /*
54 * Module description.
55 */
56 MODULE_AUTHOR("IBM Corporation");
57 MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
58 "Copyright IBM Corp. 2001, 2012");
59 MODULE_LICENSE("GPL");
60
61 /*
62 * zcrypt tracepoint functions
63 */
64 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_req);
65 EXPORT_TRACEPOINT_SYMBOL(s390_zcrypt_rep);
66
67 static int zcrypt_hwrng_seed = 1;
68 module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, S_IRUSR|S_IRGRP);
69 MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
70
71 DEFINE_SPINLOCK(zcrypt_list_lock);
72 LIST_HEAD(zcrypt_card_list);
73 int zcrypt_device_count;
74
75 static atomic_t zcrypt_open_count = ATOMIC_INIT(0);
76 static atomic_t zcrypt_rescan_count = ATOMIC_INIT(0);
77
78 atomic_t zcrypt_rescan_req = ATOMIC_INIT(0);
79 EXPORT_SYMBOL(zcrypt_rescan_req);
80
81 static LIST_HEAD(zcrypt_ops_list);
82
83 /* Zcrypt related debug feature stuff. */
84 debug_info_t *zcrypt_dbf_info;
85
86 /**
87 * Process a rescan of the transport layer.
88 *
89 * Returns 1, if the rescan has been processed, otherwise 0.
90 */
zcrypt_process_rescan(void)91 static inline int zcrypt_process_rescan(void)
92 {
93 if (atomic_read(&zcrypt_rescan_req)) {
94 atomic_set(&zcrypt_rescan_req, 0);
95 atomic_inc(&zcrypt_rescan_count);
96 ap_bus_force_rescan();
97 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d\n",
98 atomic_inc_return(&zcrypt_rescan_count));
99 return 1;
100 }
101 return 0;
102 }
103
zcrypt_msgtype_register(struct zcrypt_ops * zops)104 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
105 {
106 list_add_tail(&zops->list, &zcrypt_ops_list);
107 }
108
zcrypt_msgtype_unregister(struct zcrypt_ops * zops)109 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
110 {
111 list_del_init(&zops->list);
112 }
113
zcrypt_msgtype(unsigned char * name,int variant)114 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
115 {
116 struct zcrypt_ops *zops;
117
118 list_for_each_entry(zops, &zcrypt_ops_list, list)
119 if ((zops->variant == variant) &&
120 (!strncmp(zops->name, name, sizeof(zops->name))))
121 return zops;
122 return NULL;
123 }
124 EXPORT_SYMBOL(zcrypt_msgtype);
125
126 /**
127 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
128 *
129 * This function is not supported beyond zcrypt 1.3.1.
130 */
zcrypt_read(struct file * filp,char __user * buf,size_t count,loff_t * f_pos)131 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
132 size_t count, loff_t *f_pos)
133 {
134 return -EPERM;
135 }
136
137 /**
138 * zcrypt_write(): Not allowed.
139 *
140 * Write is is not allowed
141 */
zcrypt_write(struct file * filp,const char __user * buf,size_t count,loff_t * f_pos)142 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
143 size_t count, loff_t *f_pos)
144 {
145 return -EPERM;
146 }
147
148 /**
149 * zcrypt_open(): Count number of users.
150 *
151 * Device open function to count number of users.
152 */
zcrypt_open(struct inode * inode,struct file * filp)153 static int zcrypt_open(struct inode *inode, struct file *filp)
154 {
155 atomic_inc(&zcrypt_open_count);
156 return nonseekable_open(inode, filp);
157 }
158
159 /**
160 * zcrypt_release(): Count number of users.
161 *
162 * Device close function to count number of users.
163 */
zcrypt_release(struct inode * inode,struct file * filp)164 static int zcrypt_release(struct inode *inode, struct file *filp)
165 {
166 atomic_dec(&zcrypt_open_count);
167 return 0;
168 }
169
zcrypt_pick_queue(struct zcrypt_card * zc,struct zcrypt_queue * zq,unsigned int weight)170 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
171 struct zcrypt_queue *zq,
172 unsigned int weight)
173 {
174 if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
175 return NULL;
176 zcrypt_queue_get(zq);
177 get_device(&zq->queue->ap_dev.device);
178 atomic_add(weight, &zc->load);
179 atomic_add(weight, &zq->load);
180 zq->request_count++;
181 return zq;
182 }
183
zcrypt_drop_queue(struct zcrypt_card * zc,struct zcrypt_queue * zq,unsigned int weight)184 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
185 struct zcrypt_queue *zq,
186 unsigned int weight)
187 {
188 struct module *mod = zq->queue->ap_dev.drv->driver.owner;
189
190 zq->request_count--;
191 atomic_sub(weight, &zc->load);
192 atomic_sub(weight, &zq->load);
193 put_device(&zq->queue->ap_dev.device);
194 zcrypt_queue_put(zq);
195 module_put(mod);
196 }
197
zcrypt_card_compare(struct zcrypt_card * zc,struct zcrypt_card * pref_zc,unsigned weight,unsigned pref_weight)198 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
199 struct zcrypt_card *pref_zc,
200 unsigned weight, unsigned pref_weight)
201 {
202 if (!pref_zc)
203 return false;
204 weight += atomic_read(&zc->load);
205 pref_weight += atomic_read(&pref_zc->load);
206 if (weight == pref_weight)
207 return atomic_read(&zc->card->total_request_count) >
208 atomic_read(&pref_zc->card->total_request_count);
209 return weight > pref_weight;
210 }
211
zcrypt_queue_compare(struct zcrypt_queue * zq,struct zcrypt_queue * pref_zq,unsigned weight,unsigned pref_weight)212 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
213 struct zcrypt_queue *pref_zq,
214 unsigned weight, unsigned pref_weight)
215 {
216 if (!pref_zq)
217 return false;
218 weight += atomic_read(&zq->load);
219 pref_weight += atomic_read(&pref_zq->load);
220 if (weight == pref_weight)
221 return zq->queue->total_request_count >
222 pref_zq->queue->total_request_count;
223 return weight > pref_weight;
224 }
225
226 /*
227 * zcrypt ioctls.
228 */
zcrypt_rsa_modexpo(struct ica_rsa_modexpo * mex)229 static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
230 {
231 struct zcrypt_card *zc, *pref_zc;
232 struct zcrypt_queue *zq, *pref_zq;
233 unsigned int weight, pref_weight;
234 unsigned int func_code;
235 int qid = 0, rc = -ENODEV;
236
237 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
238
239 if (mex->outputdatalength < mex->inputdatalength) {
240 func_code = 0;
241 rc = -EINVAL;
242 goto out;
243 }
244
245 /*
246 * As long as outputdatalength is big enough, we can set the
247 * outputdatalength equal to the inputdatalength, since that is the
248 * number of bytes we will copy in any case
249 */
250 mex->outputdatalength = mex->inputdatalength;
251
252 rc = get_rsa_modex_fc(mex, &func_code);
253 if (rc)
254 goto out;
255
256 pref_zc = NULL;
257 pref_zq = NULL;
258 spin_lock(&zcrypt_list_lock);
259 for_each_zcrypt_card(zc) {
260 /* Check for online accelarator and CCA cards */
261 if (!zc->online || !(zc->card->functions & 0x18000000))
262 continue;
263 /* Check for size limits */
264 if (zc->min_mod_size > mex->inputdatalength ||
265 zc->max_mod_size < mex->inputdatalength)
266 continue;
267 /* get weight index of the card device */
268 weight = zc->speed_rating[func_code];
269 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
270 continue;
271 for_each_zcrypt_queue(zq, zc) {
272 /* check if device is online and eligible */
273 if (!zq->online || !zq->ops->rsa_modexpo)
274 continue;
275 if (zcrypt_queue_compare(zq, pref_zq,
276 weight, pref_weight))
277 continue;
278 pref_zc = zc;
279 pref_zq = zq;
280 pref_weight = weight;
281 }
282 }
283 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
284 spin_unlock(&zcrypt_list_lock);
285
286 if (!pref_zq) {
287 rc = -ENODEV;
288 goto out;
289 }
290
291 qid = pref_zq->queue->qid;
292 rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
293
294 spin_lock(&zcrypt_list_lock);
295 zcrypt_drop_queue(pref_zc, pref_zq, weight);
296 spin_unlock(&zcrypt_list_lock);
297
298 out:
299 trace_s390_zcrypt_rep(mex, func_code, rc,
300 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
301 return rc;
302 }
303
zcrypt_rsa_crt(struct ica_rsa_modexpo_crt * crt)304 static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
305 {
306 struct zcrypt_card *zc, *pref_zc;
307 struct zcrypt_queue *zq, *pref_zq;
308 unsigned int weight, pref_weight;
309 unsigned int func_code;
310 int qid = 0, rc = -ENODEV;
311
312 trace_s390_zcrypt_req(crt, TP_ICARSACRT);
313
314 if (crt->outputdatalength < crt->inputdatalength) {
315 func_code = 0;
316 rc = -EINVAL;
317 goto out;
318 }
319
320 /*
321 * As long as outputdatalength is big enough, we can set the
322 * outputdatalength equal to the inputdatalength, since that is the
323 * number of bytes we will copy in any case
324 */
325 crt->outputdatalength = crt->inputdatalength;
326
327 rc = get_rsa_crt_fc(crt, &func_code);
328 if (rc)
329 goto out;
330
331 pref_zc = NULL;
332 pref_zq = NULL;
333 spin_lock(&zcrypt_list_lock);
334 for_each_zcrypt_card(zc) {
335 /* Check for online accelarator and CCA cards */
336 if (!zc->online || !(zc->card->functions & 0x18000000))
337 continue;
338 /* Check for size limits */
339 if (zc->min_mod_size > crt->inputdatalength ||
340 zc->max_mod_size < crt->inputdatalength)
341 continue;
342 /* get weight index of the card device */
343 weight = zc->speed_rating[func_code];
344 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
345 continue;
346 for_each_zcrypt_queue(zq, zc) {
347 /* check if device is online and eligible */
348 if (!zq->online || !zq->ops->rsa_modexpo_crt)
349 continue;
350 if (zcrypt_queue_compare(zq, pref_zq,
351 weight, pref_weight))
352 continue;
353 pref_zc = zc;
354 pref_zq = zq;
355 pref_weight = weight;
356 }
357 }
358 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
359 spin_unlock(&zcrypt_list_lock);
360
361 if (!pref_zq) {
362 rc = -ENODEV;
363 goto out;
364 }
365
366 qid = pref_zq->queue->qid;
367 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
368
369 spin_lock(&zcrypt_list_lock);
370 zcrypt_drop_queue(pref_zc, pref_zq, weight);
371 spin_unlock(&zcrypt_list_lock);
372
373 out:
374 trace_s390_zcrypt_rep(crt, func_code, rc,
375 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
376 return rc;
377 }
378
zcrypt_send_cprb(struct ica_xcRB * xcRB)379 long zcrypt_send_cprb(struct ica_xcRB *xcRB)
380 {
381 struct zcrypt_card *zc, *pref_zc;
382 struct zcrypt_queue *zq, *pref_zq;
383 struct ap_message ap_msg;
384 unsigned int weight, pref_weight;
385 unsigned int func_code;
386 unsigned short *domain;
387 int qid = 0, rc = -ENODEV;
388
389 trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
390
391 rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
392 if (rc)
393 goto out;
394
395 pref_zc = NULL;
396 pref_zq = NULL;
397 spin_lock(&zcrypt_list_lock);
398 for_each_zcrypt_card(zc) {
399 /* Check for online CCA cards */
400 if (!zc->online || !(zc->card->functions & 0x10000000))
401 continue;
402 /* Check for user selected CCA card */
403 if (xcRB->user_defined != AUTOSELECT &&
404 xcRB->user_defined != zc->card->id)
405 continue;
406 /* get weight index of the card device */
407 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
408 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
409 continue;
410 for_each_zcrypt_queue(zq, zc) {
411 /* check if device is online and eligible */
412 if (!zq->online ||
413 !zq->ops->send_cprb ||
414 ((*domain != (unsigned short) AUTOSELECT) &&
415 (*domain != AP_QID_QUEUE(zq->queue->qid))))
416 continue;
417 if (zcrypt_queue_compare(zq, pref_zq,
418 weight, pref_weight))
419 continue;
420 pref_zc = zc;
421 pref_zq = zq;
422 pref_weight = weight;
423 }
424 }
425 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
426 spin_unlock(&zcrypt_list_lock);
427
428 if (!pref_zq) {
429 rc = -ENODEV;
430 goto out;
431 }
432
433 /* in case of auto select, provide the correct domain */
434 qid = pref_zq->queue->qid;
435 if (*domain == (unsigned short) AUTOSELECT)
436 *domain = AP_QID_QUEUE(qid);
437
438 rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
439
440 spin_lock(&zcrypt_list_lock);
441 zcrypt_drop_queue(pref_zc, pref_zq, weight);
442 spin_unlock(&zcrypt_list_lock);
443
444 out:
445 trace_s390_zcrypt_rep(xcRB, func_code, rc,
446 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
447 return rc;
448 }
449 EXPORT_SYMBOL(zcrypt_send_cprb);
450
is_desired_ep11_card(unsigned int dev_id,unsigned short target_num,struct ep11_target_dev * targets)451 static bool is_desired_ep11_card(unsigned int dev_id,
452 unsigned short target_num,
453 struct ep11_target_dev *targets)
454 {
455 while (target_num-- > 0) {
456 if (dev_id == targets->ap_id)
457 return true;
458 targets++;
459 }
460 return false;
461 }
462
is_desired_ep11_queue(unsigned int dev_qid,unsigned short target_num,struct ep11_target_dev * targets)463 static bool is_desired_ep11_queue(unsigned int dev_qid,
464 unsigned short target_num,
465 struct ep11_target_dev *targets)
466 {
467 while (target_num-- > 0) {
468 if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
469 return true;
470 targets++;
471 }
472 return false;
473 }
474
zcrypt_send_ep11_cprb(struct ep11_urb * xcrb)475 static long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
476 {
477 struct zcrypt_card *zc, *pref_zc;
478 struct zcrypt_queue *zq, *pref_zq;
479 struct ep11_target_dev *targets;
480 unsigned short target_num;
481 unsigned int weight, pref_weight;
482 unsigned int func_code;
483 struct ap_message ap_msg;
484 int qid = 0, rc = -ENODEV;
485
486 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
487
488 target_num = (unsigned short) xcrb->targets_num;
489
490 /* empty list indicates autoselect (all available targets) */
491 targets = NULL;
492 if (target_num != 0) {
493 struct ep11_target_dev __user *uptr;
494
495 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
496 if (!targets) {
497 func_code = 0;
498 rc = -ENOMEM;
499 goto out;
500 }
501
502 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
503 if (copy_from_user(targets, uptr,
504 target_num * sizeof(*targets))) {
505 func_code = 0;
506 rc = -EFAULT;
507 goto out;
508 }
509 }
510
511 rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
512 if (rc)
513 goto out_free;
514
515 pref_zc = NULL;
516 pref_zq = NULL;
517 spin_lock(&zcrypt_list_lock);
518 for_each_zcrypt_card(zc) {
519 /* Check for online EP11 cards */
520 if (!zc->online || !(zc->card->functions & 0x04000000))
521 continue;
522 /* Check for user selected EP11 card */
523 if (targets &&
524 !is_desired_ep11_card(zc->card->id, target_num, targets))
525 continue;
526 /* get weight index of the card device */
527 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
528 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
529 continue;
530 for_each_zcrypt_queue(zq, zc) {
531 /* check if device is online and eligible */
532 if (!zq->online ||
533 !zq->ops->send_ep11_cprb ||
534 (targets &&
535 !is_desired_ep11_queue(zq->queue->qid,
536 target_num, targets)))
537 continue;
538 if (zcrypt_queue_compare(zq, pref_zq,
539 weight, pref_weight))
540 continue;
541 pref_zc = zc;
542 pref_zq = zq;
543 pref_weight = weight;
544 }
545 }
546 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
547 spin_unlock(&zcrypt_list_lock);
548
549 if (!pref_zq) {
550 rc = -ENODEV;
551 goto out_free;
552 }
553
554 qid = pref_zq->queue->qid;
555 rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
556
557 spin_lock(&zcrypt_list_lock);
558 zcrypt_drop_queue(pref_zc, pref_zq, weight);
559 spin_unlock(&zcrypt_list_lock);
560
561 out_free:
562 kfree(targets);
563 out:
564 trace_s390_zcrypt_rep(xcrb, func_code, rc,
565 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
566 return rc;
567 }
568
zcrypt_rng(char * buffer)569 static long zcrypt_rng(char *buffer)
570 {
571 struct zcrypt_card *zc, *pref_zc;
572 struct zcrypt_queue *zq, *pref_zq;
573 unsigned int weight, pref_weight;
574 unsigned int func_code;
575 struct ap_message ap_msg;
576 unsigned int domain;
577 int qid = 0, rc = -ENODEV;
578
579 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
580
581 rc = get_rng_fc(&ap_msg, &func_code, &domain);
582 if (rc)
583 goto out;
584
585 pref_zc = NULL;
586 pref_zq = NULL;
587 spin_lock(&zcrypt_list_lock);
588 for_each_zcrypt_card(zc) {
589 /* Check for online CCA cards */
590 if (!zc->online || !(zc->card->functions & 0x10000000))
591 continue;
592 /* get weight index of the card device */
593 weight = zc->speed_rating[func_code];
594 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
595 continue;
596 for_each_zcrypt_queue(zq, zc) {
597 /* check if device is online and eligible */
598 if (!zq->online || !zq->ops->rng)
599 continue;
600 if (zcrypt_queue_compare(zq, pref_zq,
601 weight, pref_weight))
602 continue;
603 pref_zc = zc;
604 pref_zq = zq;
605 pref_weight = weight;
606 }
607 }
608 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
609 spin_unlock(&zcrypt_list_lock);
610
611 if (!pref_zq)
612 return -ENODEV;
613
614 qid = pref_zq->queue->qid;
615 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
616
617 spin_lock(&zcrypt_list_lock);
618 zcrypt_drop_queue(pref_zc, pref_zq, weight);
619 spin_unlock(&zcrypt_list_lock);
620
621 out:
622 trace_s390_zcrypt_rep(buffer, func_code, rc,
623 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
624 return rc;
625 }
626
zcrypt_device_status_mask(struct zcrypt_device_matrix * matrix)627 void zcrypt_device_status_mask(struct zcrypt_device_matrix *matrix)
628 {
629 struct zcrypt_card *zc;
630 struct zcrypt_queue *zq;
631 struct zcrypt_device_status *stat;
632
633 memset(matrix, 0, sizeof(*matrix));
634 spin_lock(&zcrypt_list_lock);
635 for_each_zcrypt_card(zc) {
636 for_each_zcrypt_queue(zq, zc) {
637 stat = matrix->device;
638 stat += AP_QID_CARD(zq->queue->qid) * MAX_ZDEV_DOMAINS;
639 stat += AP_QID_QUEUE(zq->queue->qid);
640 stat->hwtype = zc->card->ap_dev.device_type;
641 stat->functions = zc->card->functions >> 26;
642 stat->qid = zq->queue->qid;
643 stat->online = zq->online ? 0x01 : 0x00;
644 }
645 }
646 spin_unlock(&zcrypt_list_lock);
647 }
648 EXPORT_SYMBOL(zcrypt_device_status_mask);
649
zcrypt_status_mask(char status[AP_DEVICES])650 static void zcrypt_status_mask(char status[AP_DEVICES])
651 {
652 struct zcrypt_card *zc;
653 struct zcrypt_queue *zq;
654
655 memset(status, 0, sizeof(char) * AP_DEVICES);
656 spin_lock(&zcrypt_list_lock);
657 for_each_zcrypt_card(zc) {
658 for_each_zcrypt_queue(zq, zc) {
659 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
660 continue;
661 status[AP_QID_CARD(zq->queue->qid)] =
662 zc->online ? zc->user_space_type : 0x0d;
663 }
664 }
665 spin_unlock(&zcrypt_list_lock);
666 }
667
zcrypt_qdepth_mask(char qdepth[AP_DEVICES])668 static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES])
669 {
670 struct zcrypt_card *zc;
671 struct zcrypt_queue *zq;
672
673 memset(qdepth, 0, sizeof(char) * AP_DEVICES);
674 spin_lock(&zcrypt_list_lock);
675 local_bh_disable();
676 for_each_zcrypt_card(zc) {
677 for_each_zcrypt_queue(zq, zc) {
678 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
679 continue;
680 spin_lock(&zq->queue->lock);
681 qdepth[AP_QID_CARD(zq->queue->qid)] =
682 zq->queue->pendingq_count +
683 zq->queue->requestq_count;
684 spin_unlock(&zq->queue->lock);
685 }
686 }
687 local_bh_enable();
688 spin_unlock(&zcrypt_list_lock);
689 }
690
zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES])691 static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES])
692 {
693 struct zcrypt_card *zc;
694 struct zcrypt_queue *zq;
695
696 memset(reqcnt, 0, sizeof(int) * AP_DEVICES);
697 spin_lock(&zcrypt_list_lock);
698 local_bh_disable();
699 for_each_zcrypt_card(zc) {
700 for_each_zcrypt_queue(zq, zc) {
701 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
702 continue;
703 spin_lock(&zq->queue->lock);
704 reqcnt[AP_QID_CARD(zq->queue->qid)] =
705 zq->queue->total_request_count;
706 spin_unlock(&zq->queue->lock);
707 }
708 }
709 local_bh_enable();
710 spin_unlock(&zcrypt_list_lock);
711 }
712
zcrypt_pendingq_count(void)713 static int zcrypt_pendingq_count(void)
714 {
715 struct zcrypt_card *zc;
716 struct zcrypt_queue *zq;
717 int pendingq_count;
718
719 pendingq_count = 0;
720 spin_lock(&zcrypt_list_lock);
721 local_bh_disable();
722 for_each_zcrypt_card(zc) {
723 for_each_zcrypt_queue(zq, zc) {
724 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
725 continue;
726 spin_lock(&zq->queue->lock);
727 pendingq_count += zq->queue->pendingq_count;
728 spin_unlock(&zq->queue->lock);
729 }
730 }
731 local_bh_enable();
732 spin_unlock(&zcrypt_list_lock);
733 return pendingq_count;
734 }
735
zcrypt_requestq_count(void)736 static int zcrypt_requestq_count(void)
737 {
738 struct zcrypt_card *zc;
739 struct zcrypt_queue *zq;
740 int requestq_count;
741
742 requestq_count = 0;
743 spin_lock(&zcrypt_list_lock);
744 local_bh_disable();
745 for_each_zcrypt_card(zc) {
746 for_each_zcrypt_queue(zq, zc) {
747 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
748 continue;
749 spin_lock(&zq->queue->lock);
750 requestq_count += zq->queue->requestq_count;
751 spin_unlock(&zq->queue->lock);
752 }
753 }
754 local_bh_enable();
755 spin_unlock(&zcrypt_list_lock);
756 return requestq_count;
757 }
758
zcrypt_count_type(int type)759 static int zcrypt_count_type(int type)
760 {
761 struct zcrypt_card *zc;
762 struct zcrypt_queue *zq;
763 int device_count;
764
765 device_count = 0;
766 spin_lock(&zcrypt_list_lock);
767 for_each_zcrypt_card(zc) {
768 if (zc->card->id != type)
769 continue;
770 for_each_zcrypt_queue(zq, zc) {
771 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
772 continue;
773 device_count++;
774 }
775 }
776 spin_unlock(&zcrypt_list_lock);
777 return device_count;
778 }
779
780 /**
781 * zcrypt_ica_status(): Old, depracted combi status call.
782 *
783 * Old, deprecated combi status call.
784 */
zcrypt_ica_status(struct file * filp,unsigned long arg)785 static long zcrypt_ica_status(struct file *filp, unsigned long arg)
786 {
787 struct ica_z90_status *pstat;
788 int ret;
789
790 pstat = kzalloc(sizeof(*pstat), GFP_KERNEL);
791 if (!pstat)
792 return -ENOMEM;
793 pstat->totalcount = zcrypt_device_count;
794 pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA);
795 pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC);
796 pstat->requestqWaitCount = zcrypt_requestq_count();
797 pstat->pendingqWaitCount = zcrypt_pendingq_count();
798 pstat->totalOpenCount = atomic_read(&zcrypt_open_count);
799 pstat->cryptoDomain = ap_domain_index;
800 zcrypt_status_mask(pstat->status);
801 zcrypt_qdepth_mask(pstat->qdepth);
802 ret = 0;
803 if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat)))
804 ret = -EFAULT;
805 kfree(pstat);
806 return ret;
807 }
808
zcrypt_unlocked_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)809 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
810 unsigned long arg)
811 {
812 int rc;
813
814 switch (cmd) {
815 case ICARSAMODEXPO: {
816 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
817 struct ica_rsa_modexpo mex;
818 if (copy_from_user(&mex, umex, sizeof(mex)))
819 return -EFAULT;
820 do {
821 rc = zcrypt_rsa_modexpo(&mex);
822 } while (rc == -EAGAIN);
823 /* on failure: retry once again after a requested rescan */
824 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
825 do {
826 rc = zcrypt_rsa_modexpo(&mex);
827 } while (rc == -EAGAIN);
828 if (rc) {
829 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSAMODEXPO rc=%d\n", rc);
830 return rc;
831 }
832 return put_user(mex.outputdatalength, &umex->outputdatalength);
833 }
834 case ICARSACRT: {
835 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
836 struct ica_rsa_modexpo_crt crt;
837 if (copy_from_user(&crt, ucrt, sizeof(crt)))
838 return -EFAULT;
839 do {
840 rc = zcrypt_rsa_crt(&crt);
841 } while (rc == -EAGAIN);
842 /* on failure: retry once again after a requested rescan */
843 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
844 do {
845 rc = zcrypt_rsa_crt(&crt);
846 } while (rc == -EAGAIN);
847 if (rc) {
848 ZCRYPT_DBF(DBF_DEBUG, "ioctl ICARSACRT rc=%d\n", rc);
849 return rc;
850 }
851 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
852 }
853 case ZSECSENDCPRB: {
854 struct ica_xcRB __user *uxcRB = (void __user *) arg;
855 struct ica_xcRB xcRB;
856 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
857 return -EFAULT;
858 do {
859 rc = zcrypt_send_cprb(&xcRB);
860 } while (rc == -EAGAIN);
861 /* on failure: retry once again after a requested rescan */
862 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
863 do {
864 rc = zcrypt_send_cprb(&xcRB);
865 } while (rc == -EAGAIN);
866 if (rc)
867 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDCPRB rc=%d\n", rc);
868 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
869 return -EFAULT;
870 return rc;
871 }
872 case ZSENDEP11CPRB: {
873 struct ep11_urb __user *uxcrb = (void __user *)arg;
874 struct ep11_urb xcrb;
875 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
876 return -EFAULT;
877 do {
878 rc = zcrypt_send_ep11_cprb(&xcrb);
879 } while (rc == -EAGAIN);
880 /* on failure: retry once again after a requested rescan */
881 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
882 do {
883 rc = zcrypt_send_ep11_cprb(&xcrb);
884 } while (rc == -EAGAIN);
885 if (rc)
886 ZCRYPT_DBF(DBF_DEBUG, "ioctl ZSENDEP11CPRB rc=%d\n", rc);
887 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
888 return -EFAULT;
889 return rc;
890 }
891 case ZDEVICESTATUS: {
892 struct zcrypt_device_matrix *device_status;
893
894 device_status = kzalloc(sizeof(struct zcrypt_device_matrix),
895 GFP_KERNEL);
896 if (!device_status)
897 return -ENOMEM;
898
899 zcrypt_device_status_mask(device_status);
900
901 if (copy_to_user((char __user *) arg, device_status,
902 sizeof(struct zcrypt_device_matrix))) {
903 kfree(device_status);
904 return -EFAULT;
905 }
906
907 kfree(device_status);
908 return 0;
909 }
910 case Z90STAT_STATUS_MASK: {
911 char status[AP_DEVICES];
912 zcrypt_status_mask(status);
913 if (copy_to_user((char __user *) arg, status,
914 sizeof(char) * AP_DEVICES))
915 return -EFAULT;
916 return 0;
917 }
918 case Z90STAT_QDEPTH_MASK: {
919 char qdepth[AP_DEVICES];
920 zcrypt_qdepth_mask(qdepth);
921 if (copy_to_user((char __user *) arg, qdepth,
922 sizeof(char) * AP_DEVICES))
923 return -EFAULT;
924 return 0;
925 }
926 case Z90STAT_PERDEV_REQCNT: {
927 int reqcnt[AP_DEVICES];
928 zcrypt_perdev_reqcnt(reqcnt);
929 if (copy_to_user((int __user *) arg, reqcnt,
930 sizeof(int) * AP_DEVICES))
931 return -EFAULT;
932 return 0;
933 }
934 case Z90STAT_REQUESTQ_COUNT:
935 return put_user(zcrypt_requestq_count(), (int __user *) arg);
936 case Z90STAT_PENDINGQ_COUNT:
937 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
938 case Z90STAT_TOTALOPEN_COUNT:
939 return put_user(atomic_read(&zcrypt_open_count),
940 (int __user *) arg);
941 case Z90STAT_DOMAIN_INDEX:
942 return put_user(ap_domain_index, (int __user *) arg);
943 /*
944 * Deprecated ioctls. Don't add another device count ioctl,
945 * you can count them yourself in the user space with the
946 * output of the Z90STAT_STATUS_MASK ioctl.
947 */
948 case ICAZ90STATUS:
949 return zcrypt_ica_status(filp, arg);
950 case Z90STAT_TOTALCOUNT:
951 return put_user(zcrypt_device_count, (int __user *) arg);
952 case Z90STAT_PCICACOUNT:
953 return put_user(zcrypt_count_type(ZCRYPT_PCICA),
954 (int __user *) arg);
955 case Z90STAT_PCICCCOUNT:
956 return put_user(zcrypt_count_type(ZCRYPT_PCICC),
957 (int __user *) arg);
958 case Z90STAT_PCIXCCMCL2COUNT:
959 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2),
960 (int __user *) arg);
961 case Z90STAT_PCIXCCMCL3COUNT:
962 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
963 (int __user *) arg);
964 case Z90STAT_PCIXCCCOUNT:
965 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) +
966 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
967 (int __user *) arg);
968 case Z90STAT_CEX2CCOUNT:
969 return put_user(zcrypt_count_type(ZCRYPT_CEX2C),
970 (int __user *) arg);
971 case Z90STAT_CEX2ACOUNT:
972 return put_user(zcrypt_count_type(ZCRYPT_CEX2A),
973 (int __user *) arg);
974 default:
975 /* unknown ioctl number */
976 return -ENOIOCTLCMD;
977 }
978 }
979
980 #ifdef CONFIG_COMPAT
981 /*
982 * ioctl32 conversion routines
983 */
984 struct compat_ica_rsa_modexpo {
985 compat_uptr_t inputdata;
986 unsigned int inputdatalength;
987 compat_uptr_t outputdata;
988 unsigned int outputdatalength;
989 compat_uptr_t b_key;
990 compat_uptr_t n_modulus;
991 };
992
trans_modexpo32(struct file * filp,unsigned int cmd,unsigned long arg)993 static long trans_modexpo32(struct file *filp, unsigned int cmd,
994 unsigned long arg)
995 {
996 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
997 struct compat_ica_rsa_modexpo mex32;
998 struct ica_rsa_modexpo mex64;
999 long rc;
1000
1001 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
1002 return -EFAULT;
1003 mex64.inputdata = compat_ptr(mex32.inputdata);
1004 mex64.inputdatalength = mex32.inputdatalength;
1005 mex64.outputdata = compat_ptr(mex32.outputdata);
1006 mex64.outputdatalength = mex32.outputdatalength;
1007 mex64.b_key = compat_ptr(mex32.b_key);
1008 mex64.n_modulus = compat_ptr(mex32.n_modulus);
1009 do {
1010 rc = zcrypt_rsa_modexpo(&mex64);
1011 } while (rc == -EAGAIN);
1012 /* on failure: retry once again after a requested rescan */
1013 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1014 do {
1015 rc = zcrypt_rsa_modexpo(&mex64);
1016 } while (rc == -EAGAIN);
1017 if (rc)
1018 return rc;
1019 return put_user(mex64.outputdatalength,
1020 &umex32->outputdatalength);
1021 }
1022
1023 struct compat_ica_rsa_modexpo_crt {
1024 compat_uptr_t inputdata;
1025 unsigned int inputdatalength;
1026 compat_uptr_t outputdata;
1027 unsigned int outputdatalength;
1028 compat_uptr_t bp_key;
1029 compat_uptr_t bq_key;
1030 compat_uptr_t np_prime;
1031 compat_uptr_t nq_prime;
1032 compat_uptr_t u_mult_inv;
1033 };
1034
trans_modexpo_crt32(struct file * filp,unsigned int cmd,unsigned long arg)1035 static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
1036 unsigned long arg)
1037 {
1038 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1039 struct compat_ica_rsa_modexpo_crt crt32;
1040 struct ica_rsa_modexpo_crt crt64;
1041 long rc;
1042
1043 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1044 return -EFAULT;
1045 crt64.inputdata = compat_ptr(crt32.inputdata);
1046 crt64.inputdatalength = crt32.inputdatalength;
1047 crt64.outputdata= compat_ptr(crt32.outputdata);
1048 crt64.outputdatalength = crt32.outputdatalength;
1049 crt64.bp_key = compat_ptr(crt32.bp_key);
1050 crt64.bq_key = compat_ptr(crt32.bq_key);
1051 crt64.np_prime = compat_ptr(crt32.np_prime);
1052 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1053 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1054 do {
1055 rc = zcrypt_rsa_crt(&crt64);
1056 } while (rc == -EAGAIN);
1057 /* on failure: retry once again after a requested rescan */
1058 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1059 do {
1060 rc = zcrypt_rsa_crt(&crt64);
1061 } while (rc == -EAGAIN);
1062 if (rc)
1063 return rc;
1064 return put_user(crt64.outputdatalength,
1065 &ucrt32->outputdatalength);
1066 }
1067
1068 struct compat_ica_xcRB {
1069 unsigned short agent_ID;
1070 unsigned int user_defined;
1071 unsigned short request_ID;
1072 unsigned int request_control_blk_length;
1073 unsigned char padding1[16 - sizeof (compat_uptr_t)];
1074 compat_uptr_t request_control_blk_addr;
1075 unsigned int request_data_length;
1076 char padding2[16 - sizeof (compat_uptr_t)];
1077 compat_uptr_t request_data_address;
1078 unsigned int reply_control_blk_length;
1079 char padding3[16 - sizeof (compat_uptr_t)];
1080 compat_uptr_t reply_control_blk_addr;
1081 unsigned int reply_data_length;
1082 char padding4[16 - sizeof (compat_uptr_t)];
1083 compat_uptr_t reply_data_addr;
1084 unsigned short priority_window;
1085 unsigned int status;
1086 } __attribute__((packed));
1087
trans_xcRB32(struct file * filp,unsigned int cmd,unsigned long arg)1088 static long trans_xcRB32(struct file *filp, unsigned int cmd,
1089 unsigned long arg)
1090 {
1091 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1092 struct compat_ica_xcRB xcRB32;
1093 struct ica_xcRB xcRB64;
1094 long rc;
1095
1096 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1097 return -EFAULT;
1098 xcRB64.agent_ID = xcRB32.agent_ID;
1099 xcRB64.user_defined = xcRB32.user_defined;
1100 xcRB64.request_ID = xcRB32.request_ID;
1101 xcRB64.request_control_blk_length =
1102 xcRB32.request_control_blk_length;
1103 xcRB64.request_control_blk_addr =
1104 compat_ptr(xcRB32.request_control_blk_addr);
1105 xcRB64.request_data_length =
1106 xcRB32.request_data_length;
1107 xcRB64.request_data_address =
1108 compat_ptr(xcRB32.request_data_address);
1109 xcRB64.reply_control_blk_length =
1110 xcRB32.reply_control_blk_length;
1111 xcRB64.reply_control_blk_addr =
1112 compat_ptr(xcRB32.reply_control_blk_addr);
1113 xcRB64.reply_data_length = xcRB32.reply_data_length;
1114 xcRB64.reply_data_addr =
1115 compat_ptr(xcRB32.reply_data_addr);
1116 xcRB64.priority_window = xcRB32.priority_window;
1117 xcRB64.status = xcRB32.status;
1118 do {
1119 rc = zcrypt_send_cprb(&xcRB64);
1120 } while (rc == -EAGAIN);
1121 /* on failure: retry once again after a requested rescan */
1122 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1123 do {
1124 rc = zcrypt_send_cprb(&xcRB64);
1125 } while (rc == -EAGAIN);
1126 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1127 xcRB32.reply_data_length = xcRB64.reply_data_length;
1128 xcRB32.status = xcRB64.status;
1129 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1130 return -EFAULT;
1131 return rc;
1132 }
1133
zcrypt_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1134 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1135 unsigned long arg)
1136 {
1137 if (cmd == ICARSAMODEXPO)
1138 return trans_modexpo32(filp, cmd, arg);
1139 if (cmd == ICARSACRT)
1140 return trans_modexpo_crt32(filp, cmd, arg);
1141 if (cmd == ZSECSENDCPRB)
1142 return trans_xcRB32(filp, cmd, arg);
1143 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1144 }
1145 #endif
1146
1147 /*
1148 * Misc device file operations.
1149 */
1150 static const struct file_operations zcrypt_fops = {
1151 .owner = THIS_MODULE,
1152 .read = zcrypt_read,
1153 .write = zcrypt_write,
1154 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1155 #ifdef CONFIG_COMPAT
1156 .compat_ioctl = zcrypt_compat_ioctl,
1157 #endif
1158 .open = zcrypt_open,
1159 .release = zcrypt_release,
1160 .llseek = no_llseek,
1161 };
1162
1163 /*
1164 * Misc device.
1165 */
1166 static struct miscdevice zcrypt_misc_device = {
1167 .minor = MISC_DYNAMIC_MINOR,
1168 .name = "z90crypt",
1169 .fops = &zcrypt_fops,
1170 };
1171
1172 /*
1173 * Deprecated /proc entry support.
1174 */
1175 static struct proc_dir_entry *zcrypt_entry;
1176
sprintcl(struct seq_file * m,unsigned char * addr,unsigned int len)1177 static void sprintcl(struct seq_file *m, unsigned char *addr, unsigned int len)
1178 {
1179 int i;
1180
1181 for (i = 0; i < len; i++)
1182 seq_printf(m, "%01x", (unsigned int) addr[i]);
1183 seq_putc(m, ' ');
1184 }
1185
sprintrw(struct seq_file * m,unsigned char * addr,unsigned int len)1186 static void sprintrw(struct seq_file *m, unsigned char *addr, unsigned int len)
1187 {
1188 int inl, c, cx;
1189
1190 seq_printf(m, " ");
1191 inl = 0;
1192 for (c = 0; c < (len / 16); c++) {
1193 sprintcl(m, addr+inl, 16);
1194 inl += 16;
1195 }
1196 cx = len%16;
1197 if (cx) {
1198 sprintcl(m, addr+inl, cx);
1199 inl += cx;
1200 }
1201 seq_putc(m, '\n');
1202 }
1203
sprinthx(unsigned char * title,struct seq_file * m,unsigned char * addr,unsigned int len)1204 static void sprinthx(unsigned char *title, struct seq_file *m,
1205 unsigned char *addr, unsigned int len)
1206 {
1207 int inl, r, rx;
1208
1209 seq_printf(m, "\n%s\n", title);
1210 inl = 0;
1211 for (r = 0; r < (len / 64); r++) {
1212 sprintrw(m, addr+inl, 64);
1213 inl += 64;
1214 }
1215 rx = len % 64;
1216 if (rx) {
1217 sprintrw(m, addr+inl, rx);
1218 inl += rx;
1219 }
1220 seq_putc(m, '\n');
1221 }
1222
sprinthx4(unsigned char * title,struct seq_file * m,unsigned int * array,unsigned int len)1223 static void sprinthx4(unsigned char *title, struct seq_file *m,
1224 unsigned int *array, unsigned int len)
1225 {
1226 seq_printf(m, "\n%s\n", title);
1227 seq_hex_dump(m, " ", DUMP_PREFIX_NONE, 32, 4, array, len, false);
1228 seq_putc(m, '\n');
1229 }
1230
zcrypt_proc_show(struct seq_file * m,void * v)1231 static int zcrypt_proc_show(struct seq_file *m, void *v)
1232 {
1233 char workarea[sizeof(int) * AP_DEVICES];
1234
1235 seq_printf(m, "\nzcrypt version: %d.%d.%d\n",
1236 ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT);
1237 seq_printf(m, "Cryptographic domain: %d\n", ap_domain_index);
1238 seq_printf(m, "Total device count: %d\n", zcrypt_device_count);
1239 seq_printf(m, "PCICA count: %d\n", zcrypt_count_type(ZCRYPT_PCICA));
1240 seq_printf(m, "PCICC count: %d\n", zcrypt_count_type(ZCRYPT_PCICC));
1241 seq_printf(m, "PCIXCC MCL2 count: %d\n",
1242 zcrypt_count_type(ZCRYPT_PCIXCC_MCL2));
1243 seq_printf(m, "PCIXCC MCL3 count: %d\n",
1244 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3));
1245 seq_printf(m, "CEX2C count: %d\n", zcrypt_count_type(ZCRYPT_CEX2C));
1246 seq_printf(m, "CEX2A count: %d\n", zcrypt_count_type(ZCRYPT_CEX2A));
1247 seq_printf(m, "CEX3C count: %d\n", zcrypt_count_type(ZCRYPT_CEX3C));
1248 seq_printf(m, "CEX3A count: %d\n", zcrypt_count_type(ZCRYPT_CEX3A));
1249 seq_printf(m, "requestq count: %d\n", zcrypt_requestq_count());
1250 seq_printf(m, "pendingq count: %d\n", zcrypt_pendingq_count());
1251 seq_printf(m, "Total open handles: %d\n\n",
1252 atomic_read(&zcrypt_open_count));
1253 zcrypt_status_mask(workarea);
1254 sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) "
1255 "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A",
1256 m, workarea, AP_DEVICES);
1257 zcrypt_qdepth_mask(workarea);
1258 sprinthx("Waiting work element counts", m, workarea, AP_DEVICES);
1259 zcrypt_perdev_reqcnt((int *) workarea);
1260 sprinthx4("Per-device successfully completed request counts",
1261 m, (unsigned int *) workarea, AP_DEVICES);
1262 return 0;
1263 }
1264
zcrypt_proc_open(struct inode * inode,struct file * file)1265 static int zcrypt_proc_open(struct inode *inode, struct file *file)
1266 {
1267 return single_open(file, zcrypt_proc_show, NULL);
1268 }
1269
zcrypt_disable_card(int index)1270 static void zcrypt_disable_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 = 0;
1281 ap_flush_queue(zq->queue);
1282 }
1283 }
1284 spin_unlock(&zcrypt_list_lock);
1285 }
1286
zcrypt_enable_card(int index)1287 static void zcrypt_enable_card(int index)
1288 {
1289 struct zcrypt_card *zc;
1290 struct zcrypt_queue *zq;
1291
1292 spin_lock(&zcrypt_list_lock);
1293 for_each_zcrypt_card(zc) {
1294 for_each_zcrypt_queue(zq, zc) {
1295 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1296 continue;
1297 zq->online = 1;
1298 ap_flush_queue(zq->queue);
1299 }
1300 }
1301 spin_unlock(&zcrypt_list_lock);
1302 }
1303
zcrypt_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * pos)1304 static ssize_t zcrypt_proc_write(struct file *file, const char __user *buffer,
1305 size_t count, loff_t *pos)
1306 {
1307 unsigned char *lbuf, *ptr;
1308 size_t local_count;
1309 int j;
1310
1311 if (count <= 0)
1312 return 0;
1313
1314 #define LBUFSIZE 1200UL
1315 lbuf = kmalloc(LBUFSIZE, GFP_KERNEL);
1316 if (!lbuf)
1317 return 0;
1318
1319 local_count = min(LBUFSIZE - 1, count);
1320 if (copy_from_user(lbuf, buffer, local_count) != 0) {
1321 kfree(lbuf);
1322 return -EFAULT;
1323 }
1324 lbuf[local_count] = '\0';
1325
1326 ptr = strstr(lbuf, "Online devices");
1327 if (!ptr)
1328 goto out;
1329 ptr = strstr(ptr, "\n");
1330 if (!ptr)
1331 goto out;
1332 ptr++;
1333
1334 if (strstr(ptr, "Waiting work element counts") == NULL)
1335 goto out;
1336
1337 for (j = 0; j < 64 && *ptr; ptr++) {
1338 /*
1339 * '0' for no device, '1' for PCICA, '2' for PCICC,
1340 * '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3,
1341 * '5' for CEX2C and '6' for CEX2A'
1342 * '7' for CEX3C and '8' for CEX3A
1343 */
1344 if (*ptr >= '0' && *ptr <= '8')
1345 j++;
1346 else if (*ptr == 'd' || *ptr == 'D')
1347 zcrypt_disable_card(j++);
1348 else if (*ptr == 'e' || *ptr == 'E')
1349 zcrypt_enable_card(j++);
1350 else if (*ptr != ' ' && *ptr != '\t')
1351 break;
1352 }
1353 out:
1354 kfree(lbuf);
1355 return count;
1356 }
1357
1358 static const struct file_operations zcrypt_proc_fops = {
1359 .owner = THIS_MODULE,
1360 .open = zcrypt_proc_open,
1361 .read = seq_read,
1362 .llseek = seq_lseek,
1363 .release = single_release,
1364 .write = zcrypt_proc_write,
1365 };
1366
1367 static int zcrypt_rng_device_count;
1368 static u32 *zcrypt_rng_buffer;
1369 static int zcrypt_rng_buffer_index;
1370 static DEFINE_MUTEX(zcrypt_rng_mutex);
1371
zcrypt_rng_data_read(struct hwrng * rng,u32 * data)1372 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1373 {
1374 int rc;
1375
1376 /*
1377 * We don't need locking here because the RNG API guarantees serialized
1378 * read method calls.
1379 */
1380 if (zcrypt_rng_buffer_index == 0) {
1381 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1382 /* on failure: retry once again after a requested rescan */
1383 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1384 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1385 if (rc < 0)
1386 return -EIO;
1387 zcrypt_rng_buffer_index = rc / sizeof *data;
1388 }
1389 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1390 return sizeof *data;
1391 }
1392
1393 static struct hwrng zcrypt_rng_dev = {
1394 .name = "zcrypt",
1395 .data_read = zcrypt_rng_data_read,
1396 .quality = 990,
1397 };
1398
zcrypt_rng_device_add(void)1399 int zcrypt_rng_device_add(void)
1400 {
1401 int rc = 0;
1402
1403 mutex_lock(&zcrypt_rng_mutex);
1404 if (zcrypt_rng_device_count == 0) {
1405 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1406 if (!zcrypt_rng_buffer) {
1407 rc = -ENOMEM;
1408 goto out;
1409 }
1410 zcrypt_rng_buffer_index = 0;
1411 if (!zcrypt_hwrng_seed)
1412 zcrypt_rng_dev.quality = 0;
1413 rc = hwrng_register(&zcrypt_rng_dev);
1414 if (rc)
1415 goto out_free;
1416 zcrypt_rng_device_count = 1;
1417 } else
1418 zcrypt_rng_device_count++;
1419 mutex_unlock(&zcrypt_rng_mutex);
1420 return 0;
1421
1422 out_free:
1423 free_page((unsigned long) zcrypt_rng_buffer);
1424 out:
1425 mutex_unlock(&zcrypt_rng_mutex);
1426 return rc;
1427 }
1428
zcrypt_rng_device_remove(void)1429 void zcrypt_rng_device_remove(void)
1430 {
1431 mutex_lock(&zcrypt_rng_mutex);
1432 zcrypt_rng_device_count--;
1433 if (zcrypt_rng_device_count == 0) {
1434 hwrng_unregister(&zcrypt_rng_dev);
1435 free_page((unsigned long) zcrypt_rng_buffer);
1436 }
1437 mutex_unlock(&zcrypt_rng_mutex);
1438 }
1439
zcrypt_debug_init(void)1440 int __init zcrypt_debug_init(void)
1441 {
1442 zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1443 DBF_MAX_SPRINTF_ARGS * sizeof(long));
1444 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1445 debug_set_level(zcrypt_dbf_info, DBF_ERR);
1446
1447 return 0;
1448 }
1449
zcrypt_debug_exit(void)1450 void zcrypt_debug_exit(void)
1451 {
1452 debug_unregister(zcrypt_dbf_info);
1453 }
1454
1455 /**
1456 * zcrypt_api_init(): Module initialization.
1457 *
1458 * The module initialization code.
1459 */
zcrypt_api_init(void)1460 int __init zcrypt_api_init(void)
1461 {
1462 int rc;
1463
1464 rc = zcrypt_debug_init();
1465 if (rc)
1466 goto out;
1467
1468 atomic_set(&zcrypt_rescan_req, 0);
1469
1470 /* Register the request sprayer. */
1471 rc = misc_register(&zcrypt_misc_device);
1472 if (rc < 0)
1473 goto out;
1474
1475 /* Set up the proc file system */
1476 zcrypt_entry = proc_create("driver/z90crypt", 0644, NULL,
1477 &zcrypt_proc_fops);
1478 if (!zcrypt_entry) {
1479 rc = -ENOMEM;
1480 goto out_misc;
1481 }
1482
1483 zcrypt_msgtype6_init();
1484 zcrypt_msgtype50_init();
1485 return 0;
1486
1487 out_misc:
1488 misc_deregister(&zcrypt_misc_device);
1489 out:
1490 return rc;
1491 }
1492
1493 /**
1494 * zcrypt_api_exit(): Module termination.
1495 *
1496 * The module termination code.
1497 */
zcrypt_api_exit(void)1498 void __exit zcrypt_api_exit(void)
1499 {
1500 remove_proc_entry("driver/z90crypt", NULL);
1501 misc_deregister(&zcrypt_misc_device);
1502 zcrypt_msgtype6_exit();
1503 zcrypt_msgtype50_exit();
1504 zcrypt_debug_exit();
1505 }
1506
1507 module_init(zcrypt_api_init);
1508 module_exit(zcrypt_api_exit);
1509