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sh_eth: fix EESIPR values for SH77{34|63}
[linux/fpc-iii.git] / drivers / s390 / crypto / zcrypt_api.c
blob51eece9af57778d3dc62a7b347add9855592ec44
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 static struct dentry *zcrypt_dbf_root;
85 debug_info_t *zcrypt_dbf_info;
86
87 /**
88 * Process a rescan of the transport layer.
89 *
90 * Returns 1, if the rescan has been processed, otherwise 0.
91 */
92 static inline int zcrypt_process_rescan(void)
93 {
94 if (atomic_read(&zcrypt_rescan_req)) {
95 atomic_set(&zcrypt_rescan_req, 0);
96 atomic_inc(&zcrypt_rescan_count);
97 ap_bus_force_rescan();
98 ZCRYPT_DBF(DBF_INFO, "rescan count=%07d",
99 atomic_inc_return(&zcrypt_rescan_count));
100 return 1;
101 }
102 return 0;
103 }
104
105 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
106 {
107 list_add_tail(&zops->list, &zcrypt_ops_list);
108 }
109
110 void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
111 {
112 list_del_init(&zops->list);
113 }
114
115 struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
116 {
117 struct zcrypt_ops *zops;
118
119 list_for_each_entry(zops, &zcrypt_ops_list, list)
120 if ((zops->variant == variant) &&
121 (!strncmp(zops->name, name, sizeof(zops->name))))
122 return zops;
123 return NULL;
124 }
125 EXPORT_SYMBOL(zcrypt_msgtype);
126
127 /**
128 * zcrypt_read (): Not supported beyond zcrypt 1.3.1.
129 *
130 * This function is not supported beyond zcrypt 1.3.1.
131 */
132 static ssize_t zcrypt_read(struct file *filp, char __user *buf,
133 size_t count, loff_t *f_pos)
134 {
135 return -EPERM;
136 }
137
138 /**
139 * zcrypt_write(): Not allowed.
140 *
141 * Write is is not allowed
142 */
143 static ssize_t zcrypt_write(struct file *filp, const char __user *buf,
144 size_t count, loff_t *f_pos)
145 {
146 return -EPERM;
147 }
148
149 /**
150 * zcrypt_open(): Count number of users.
151 *
152 * Device open function to count number of users.
153 */
154 static int zcrypt_open(struct inode *inode, struct file *filp)
155 {
156 atomic_inc(&zcrypt_open_count);
157 return nonseekable_open(inode, filp);
158 }
159
160 /**
161 * zcrypt_release(): Count number of users.
162 *
163 * Device close function to count number of users.
164 */
165 static int zcrypt_release(struct inode *inode, struct file *filp)
166 {
167 atomic_dec(&zcrypt_open_count);
168 return 0;
169 }
170
171 static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
172 struct zcrypt_queue *zq,
173 unsigned int weight)
174 {
175 if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
176 return NULL;
177 zcrypt_queue_get(zq);
178 get_device(&zq->queue->ap_dev.device);
179 atomic_add(weight, &zc->load);
180 atomic_add(weight, &zq->load);
181 zq->request_count++;
182 return zq;
183 }
184
185 static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
186 struct zcrypt_queue *zq,
187 unsigned int weight)
188 {
189 struct module *mod = zq->queue->ap_dev.drv->driver.owner;
190
191 zq->request_count--;
192 atomic_sub(weight, &zc->load);
193 atomic_sub(weight, &zq->load);
194 put_device(&zq->queue->ap_dev.device);
195 zcrypt_queue_put(zq);
196 module_put(mod);
197 }
198
199 static inline bool zcrypt_card_compare(struct zcrypt_card *zc,
200 struct zcrypt_card *pref_zc,
201 unsigned weight, unsigned pref_weight)
202 {
203 if (!pref_zc)
204 return 0;
205 weight += atomic_read(&zc->load);
206 pref_weight += atomic_read(&pref_zc->load);
207 if (weight == pref_weight)
208 return atomic_read(&zc->card->total_request_count) >
209 atomic_read(&pref_zc->card->total_request_count);
210 return weight > pref_weight;
211 }
212
213 static inline bool zcrypt_queue_compare(struct zcrypt_queue *zq,
214 struct zcrypt_queue *pref_zq,
215 unsigned weight, unsigned pref_weight)
216 {
217 if (!pref_zq)
218 return 0;
219 weight += atomic_read(&zq->load);
220 pref_weight += atomic_read(&pref_zq->load);
221 if (weight == pref_weight)
222 return &zq->queue->total_request_count >
223 &pref_zq->queue->total_request_count;
224 return weight > pref_weight;
225 }
226
227 /*
228 * zcrypt ioctls.
229 */
230 static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex)
231 {
232 struct zcrypt_card *zc, *pref_zc;
233 struct zcrypt_queue *zq, *pref_zq;
234 unsigned int weight, pref_weight;
235 unsigned int func_code;
236 int qid = 0, rc = -ENODEV;
237
238 trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
239
240 if (mex->outputdatalength < mex->inputdatalength) {
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
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 rc = -EINVAL;
316 goto out;
317 }
318
319 /*
320 * As long as outputdatalength is big enough, we can set the
321 * outputdatalength equal to the inputdatalength, since that is the
322 * number of bytes we will copy in any case
323 */
324 crt->outputdatalength = crt->inputdatalength;
325
326 rc = get_rsa_crt_fc(crt, &func_code);
327 if (rc)
328 goto out;
329
330 pref_zc = NULL;
331 pref_zq = NULL;
332 spin_lock(&zcrypt_list_lock);
333 for_each_zcrypt_card(zc) {
334 /* Check for online accelarator and CCA cards */
335 if (!zc->online || !(zc->card->functions & 0x18000000))
336 continue;
337 /* Check for size limits */
338 if (zc->min_mod_size > crt->inputdatalength ||
339 zc->max_mod_size < crt->inputdatalength)
340 continue;
341 /* get weight index of the card device */
342 weight = zc->speed_rating[func_code];
343 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
344 continue;
345 for_each_zcrypt_queue(zq, zc) {
346 /* check if device is online and eligible */
347 if (!zq->online || !zq->ops->rsa_modexpo_crt)
348 continue;
349 if (zcrypt_queue_compare(zq, pref_zq,
350 weight, pref_weight))
351 continue;
352 pref_zc = zc;
353 pref_zq = zq;
354 pref_weight = weight;
355 }
356 }
357 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
358 spin_unlock(&zcrypt_list_lock);
359
360 if (!pref_zq) {
361 rc = -ENODEV;
362 goto out;
363 }
364
365 qid = pref_zq->queue->qid;
366 rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
367
368 spin_lock(&zcrypt_list_lock);
369 zcrypt_drop_queue(pref_zc, pref_zq, weight);
370 spin_unlock(&zcrypt_list_lock);
371
372 out:
373 trace_s390_zcrypt_rep(crt, func_code, rc,
374 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
375 return rc;
376 }
377
378 static long zcrypt_send_cprb(struct ica_xcRB *xcRB)
379 {
380 struct zcrypt_card *zc, *pref_zc;
381 struct zcrypt_queue *zq, *pref_zq;
382 struct ap_message ap_msg;
383 unsigned int weight, pref_weight;
384 unsigned int func_code;
385 unsigned short *domain;
386 int qid = 0, rc = -ENODEV;
387
388 trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
389
390 rc = get_cprb_fc(xcRB, &ap_msg, &func_code, &domain);
391 if (rc)
392 goto out;
393
394 pref_zc = NULL;
395 pref_zq = NULL;
396 spin_lock(&zcrypt_list_lock);
397 for_each_zcrypt_card(zc) {
398 /* Check for online CCA cards */
399 if (!zc->online || !(zc->card->functions & 0x10000000))
400 continue;
401 /* Check for user selected CCA card */
402 if (xcRB->user_defined != AUTOSELECT &&
403 xcRB->user_defined != zc->card->id)
404 continue;
405 /* get weight index of the card device */
406 weight = speed_idx_cca(func_code) * zc->speed_rating[SECKEY];
407 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
408 continue;
409 for_each_zcrypt_queue(zq, zc) {
410 /* check if device is online and eligible */
411 if (!zq->online ||
412 !zq->ops->send_cprb ||
413 ((*domain != (unsigned short) AUTOSELECT) &&
414 (*domain != AP_QID_QUEUE(zq->queue->qid))))
415 continue;
416 if (zcrypt_queue_compare(zq, pref_zq,
417 weight, pref_weight))
418 continue;
419 pref_zc = zc;
420 pref_zq = zq;
421 pref_weight = weight;
422 }
423 }
424 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
425 spin_unlock(&zcrypt_list_lock);
426
427 if (!pref_zq) {
428 rc = -ENODEV;
429 goto out;
430 }
431
432 /* in case of auto select, provide the correct domain */
433 qid = pref_zq->queue->qid;
434 if (*domain == (unsigned short) AUTOSELECT)
435 *domain = AP_QID_QUEUE(qid);
436
437 rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
438
439 spin_lock(&zcrypt_list_lock);
440 zcrypt_drop_queue(pref_zc, pref_zq, weight);
441 spin_unlock(&zcrypt_list_lock);
442
443 out:
444 trace_s390_zcrypt_rep(xcRB, func_code, rc,
445 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
446 return rc;
447 }
448
449 static bool is_desired_ep11_card(unsigned int dev_id,
450 unsigned short target_num,
451 struct ep11_target_dev *targets)
452 {
453 while (target_num-- > 0) {
454 if (dev_id == targets->ap_id)
455 return true;
456 targets++;
457 }
458 return false;
459 }
460
461 static bool is_desired_ep11_queue(unsigned int dev_qid,
462 unsigned short target_num,
463 struct ep11_target_dev *targets)
464 {
465 while (target_num-- > 0) {
466 if (AP_MKQID(targets->ap_id, targets->dom_id) == dev_qid)
467 return true;
468 targets++;
469 }
470 return false;
471 }
472
473 static long zcrypt_send_ep11_cprb(struct ep11_urb *xcrb)
474 {
475 struct zcrypt_card *zc, *pref_zc;
476 struct zcrypt_queue *zq, *pref_zq;
477 struct ep11_target_dev *targets;
478 unsigned short target_num;
479 unsigned int weight, pref_weight;
480 unsigned int func_code;
481 struct ap_message ap_msg;
482 int qid = 0, rc = -ENODEV;
483
484 trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
485
486 target_num = (unsigned short) xcrb->targets_num;
487
488 /* empty list indicates autoselect (all available targets) */
489 targets = NULL;
490 if (target_num != 0) {
491 struct ep11_target_dev __user *uptr;
492
493 targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
494 if (!targets) {
495 rc = -ENOMEM;
496 goto out;
497 }
498
499 uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
500 if (copy_from_user(targets, uptr,
501 target_num * sizeof(*targets))) {
502 rc = -EFAULT;
503 goto out;
504 }
505 }
506
507 rc = get_ep11cprb_fc(xcrb, &ap_msg, &func_code);
508 if (rc)
509 goto out_free;
510
511 pref_zc = NULL;
512 pref_zq = NULL;
513 spin_lock(&zcrypt_list_lock);
514 for_each_zcrypt_card(zc) {
515 /* Check for online EP11 cards */
516 if (!zc->online || !(zc->card->functions & 0x04000000))
517 continue;
518 /* Check for user selected EP11 card */
519 if (targets &&
520 !is_desired_ep11_card(zc->card->id, target_num, targets))
521 continue;
522 /* get weight index of the card device */
523 weight = speed_idx_ep11(func_code) * zc->speed_rating[SECKEY];
524 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
525 continue;
526 for_each_zcrypt_queue(zq, zc) {
527 /* check if device is online and eligible */
528 if (!zq->online ||
529 !zq->ops->send_ep11_cprb ||
530 (targets &&
531 !is_desired_ep11_queue(zq->queue->qid,
532 target_num, targets)))
533 continue;
534 if (zcrypt_queue_compare(zq, pref_zq,
535 weight, pref_weight))
536 continue;
537 pref_zc = zc;
538 pref_zq = zq;
539 pref_weight = weight;
540 }
541 }
542 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
543 spin_unlock(&zcrypt_list_lock);
544
545 if (!pref_zq) {
546 rc = -ENODEV;
547 goto out_free;
548 }
549
550 qid = pref_zq->queue->qid;
551 rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
552
553 spin_lock(&zcrypt_list_lock);
554 zcrypt_drop_queue(pref_zc, pref_zq, weight);
555 spin_unlock(&zcrypt_list_lock);
556
557 out_free:
558 kfree(targets);
559 out:
560 trace_s390_zcrypt_rep(xcrb, func_code, rc,
561 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
562 return rc;
563 }
564
565 static long zcrypt_rng(char *buffer)
566 {
567 struct zcrypt_card *zc, *pref_zc;
568 struct zcrypt_queue *zq, *pref_zq;
569 unsigned int weight, pref_weight;
570 unsigned int func_code;
571 struct ap_message ap_msg;
572 unsigned int domain;
573 int qid = 0, rc = -ENODEV;
574
575 trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
576
577 rc = get_rng_fc(&ap_msg, &func_code, &domain);
578 if (rc)
579 goto out;
580
581 pref_zc = NULL;
582 pref_zq = NULL;
583 spin_lock(&zcrypt_list_lock);
584 for_each_zcrypt_card(zc) {
585 /* Check for online CCA cards */
586 if (!zc->online || !(zc->card->functions & 0x10000000))
587 continue;
588 /* get weight index of the card device */
589 weight = zc->speed_rating[func_code];
590 if (zcrypt_card_compare(zc, pref_zc, weight, pref_weight))
591 continue;
592 for_each_zcrypt_queue(zq, zc) {
593 /* check if device is online and eligible */
594 if (!zq->online || !zq->ops->rng)
595 continue;
596 if (zcrypt_queue_compare(zq, pref_zq,
597 weight, pref_weight))
598 continue;
599 pref_zc = zc;
600 pref_zq = zq;
601 pref_weight = weight;
602 }
603 }
604 pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
605 spin_unlock(&zcrypt_list_lock);
606
607 if (!pref_zq)
608 return -ENODEV;
609
610 qid = pref_zq->queue->qid;
611 rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
612
613 spin_lock(&zcrypt_list_lock);
614 zcrypt_drop_queue(pref_zc, pref_zq, weight);
615 spin_unlock(&zcrypt_list_lock);
616
617 out:
618 trace_s390_zcrypt_rep(buffer, func_code, rc,
619 AP_QID_CARD(qid), AP_QID_QUEUE(qid));
620 return rc;
621 }
622
623 static void zcrypt_device_status_mask(struct zcrypt_device_matrix *matrix)
624 {
625 struct zcrypt_card *zc;
626 struct zcrypt_queue *zq;
627 struct zcrypt_device_status *stat;
628
629 memset(matrix, 0, sizeof(*matrix));
630 spin_lock(&zcrypt_list_lock);
631 for_each_zcrypt_card(zc) {
632 for_each_zcrypt_queue(zq, zc) {
633 stat = matrix->device;
634 stat += AP_QID_CARD(zq->queue->qid) * MAX_ZDEV_DOMAINS;
635 stat += AP_QID_QUEUE(zq->queue->qid);
636 stat->hwtype = zc->card->ap_dev.device_type;
637 stat->functions = zc->card->functions >> 26;
638 stat->qid = zq->queue->qid;
639 stat->online = zq->online ? 0x01 : 0x00;
640 }
641 }
642 spin_unlock(&zcrypt_list_lock);
643 }
644 EXPORT_SYMBOL(zcrypt_device_status_mask);
645
646 static void zcrypt_status_mask(char status[AP_DEVICES])
647 {
648 struct zcrypt_card *zc;
649 struct zcrypt_queue *zq;
650
651 memset(status, 0, sizeof(char) * AP_DEVICES);
652 spin_lock(&zcrypt_list_lock);
653 for_each_zcrypt_card(zc) {
654 for_each_zcrypt_queue(zq, zc) {
655 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
656 continue;
657 status[AP_QID_CARD(zq->queue->qid)] =
658 zc->online ? zc->user_space_type : 0x0d;
659 }
660 }
661 spin_unlock(&zcrypt_list_lock);
662 }
663
664 static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES])
665 {
666 struct zcrypt_card *zc;
667 struct zcrypt_queue *zq;
668
669 memset(qdepth, 0, sizeof(char) * AP_DEVICES);
670 spin_lock(&zcrypt_list_lock);
671 for_each_zcrypt_card(zc) {
672 for_each_zcrypt_queue(zq, zc) {
673 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
674 continue;
675 spin_lock(&zq->queue->lock);
676 qdepth[AP_QID_CARD(zq->queue->qid)] =
677 zq->queue->pendingq_count +
678 zq->queue->requestq_count;
679 spin_unlock(&zq->queue->lock);
680 }
681 }
682 spin_unlock(&zcrypt_list_lock);
683 }
684
685 static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES])
686 {
687 struct zcrypt_card *zc;
688 struct zcrypt_queue *zq;
689
690 memset(reqcnt, 0, sizeof(int) * AP_DEVICES);
691 spin_lock(&zcrypt_list_lock);
692 for_each_zcrypt_card(zc) {
693 for_each_zcrypt_queue(zq, zc) {
694 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
695 continue;
696 spin_lock(&zq->queue->lock);
697 reqcnt[AP_QID_CARD(zq->queue->qid)] =
698 zq->queue->total_request_count;
699 spin_unlock(&zq->queue->lock);
700 }
701 }
702 spin_unlock(&zcrypt_list_lock);
703 }
704
705 static int zcrypt_pendingq_count(void)
706 {
707 struct zcrypt_card *zc;
708 struct zcrypt_queue *zq;
709 int pendingq_count;
710
711 pendingq_count = 0;
712 spin_lock(&zcrypt_list_lock);
713 for_each_zcrypt_card(zc) {
714 for_each_zcrypt_queue(zq, zc) {
715 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
716 continue;
717 spin_lock(&zq->queue->lock);
718 pendingq_count += zq->queue->pendingq_count;
719 spin_unlock(&zq->queue->lock);
720 }
721 }
722 spin_unlock(&zcrypt_list_lock);
723 return pendingq_count;
724 }
725
726 static int zcrypt_requestq_count(void)
727 {
728 struct zcrypt_card *zc;
729 struct zcrypt_queue *zq;
730 int requestq_count;
731
732 requestq_count = 0;
733 spin_lock(&zcrypt_list_lock);
734 for_each_zcrypt_card(zc) {
735 for_each_zcrypt_queue(zq, zc) {
736 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
737 continue;
738 spin_lock(&zq->queue->lock);
739 requestq_count += zq->queue->requestq_count;
740 spin_unlock(&zq->queue->lock);
741 }
742 }
743 spin_unlock(&zcrypt_list_lock);
744 return requestq_count;
745 }
746
747 static int zcrypt_count_type(int type)
748 {
749 struct zcrypt_card *zc;
750 struct zcrypt_queue *zq;
751 int device_count;
752
753 device_count = 0;
754 spin_lock(&zcrypt_list_lock);
755 for_each_zcrypt_card(zc) {
756 if (zc->card->id != type)
757 continue;
758 for_each_zcrypt_queue(zq, zc) {
759 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
760 continue;
761 device_count++;
762 }
763 }
764 spin_unlock(&zcrypt_list_lock);
765 return device_count;
766 }
767
768 /**
769 * zcrypt_ica_status(): Old, depracted combi status call.
770 *
771 * Old, deprecated combi status call.
772 */
773 static long zcrypt_ica_status(struct file *filp, unsigned long arg)
774 {
775 struct ica_z90_status *pstat;
776 int ret;
777
778 pstat = kzalloc(sizeof(*pstat), GFP_KERNEL);
779 if (!pstat)
780 return -ENOMEM;
781 pstat->totalcount = zcrypt_device_count;
782 pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA);
783 pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC);
784 pstat->requestqWaitCount = zcrypt_requestq_count();
785 pstat->pendingqWaitCount = zcrypt_pendingq_count();
786 pstat->totalOpenCount = atomic_read(&zcrypt_open_count);
787 pstat->cryptoDomain = ap_domain_index;
788 zcrypt_status_mask(pstat->status);
789 zcrypt_qdepth_mask(pstat->qdepth);
790 ret = 0;
791 if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat)))
792 ret = -EFAULT;
793 kfree(pstat);
794 return ret;
795 }
796
797 static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
798 unsigned long arg)
799 {
800 int rc;
801
802 switch (cmd) {
803 case ICARSAMODEXPO: {
804 struct ica_rsa_modexpo __user *umex = (void __user *) arg;
805 struct ica_rsa_modexpo mex;
806 if (copy_from_user(&mex, umex, sizeof(mex)))
807 return -EFAULT;
808 do {
809 rc = zcrypt_rsa_modexpo(&mex);
810 } while (rc == -EAGAIN);
811 /* on failure: retry once again after a requested rescan */
812 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
813 do {
814 rc = zcrypt_rsa_modexpo(&mex);
815 } while (rc == -EAGAIN);
816 if (rc)
817 return rc;
818 return put_user(mex.outputdatalength, &umex->outputdatalength);
819 }
820 case ICARSACRT: {
821 struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg;
822 struct ica_rsa_modexpo_crt crt;
823 if (copy_from_user(&crt, ucrt, sizeof(crt)))
824 return -EFAULT;
825 do {
826 rc = zcrypt_rsa_crt(&crt);
827 } while (rc == -EAGAIN);
828 /* on failure: retry once again after a requested rescan */
829 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
830 do {
831 rc = zcrypt_rsa_crt(&crt);
832 } while (rc == -EAGAIN);
833 if (rc)
834 return rc;
835 return put_user(crt.outputdatalength, &ucrt->outputdatalength);
836 }
837 case ZSECSENDCPRB: {
838 struct ica_xcRB __user *uxcRB = (void __user *) arg;
839 struct ica_xcRB xcRB;
840 if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB)))
841 return -EFAULT;
842 do {
843 rc = zcrypt_send_cprb(&xcRB);
844 } while (rc == -EAGAIN);
845 /* on failure: retry once again after a requested rescan */
846 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
847 do {
848 rc = zcrypt_send_cprb(&xcRB);
849 } while (rc == -EAGAIN);
850 if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB)))
851 return -EFAULT;
852 return rc;
853 }
854 case ZSENDEP11CPRB: {
855 struct ep11_urb __user *uxcrb = (void __user *)arg;
856 struct ep11_urb xcrb;
857 if (copy_from_user(&xcrb, uxcrb, sizeof(xcrb)))
858 return -EFAULT;
859 do {
860 rc = zcrypt_send_ep11_cprb(&xcrb);
861 } while (rc == -EAGAIN);
862 /* on failure: retry once again after a requested rescan */
863 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
864 do {
865 rc = zcrypt_send_ep11_cprb(&xcrb);
866 } while (rc == -EAGAIN);
867 if (copy_to_user(uxcrb, &xcrb, sizeof(xcrb)))
868 return -EFAULT;
869 return rc;
870 }
871 case ZDEVICESTATUS: {
872 struct zcrypt_device_matrix *device_status;
873
874 device_status = kzalloc(sizeof(struct zcrypt_device_matrix),
875 GFP_KERNEL);
876 if (!device_status)
877 return -ENOMEM;
878
879 zcrypt_device_status_mask(device_status);
880
881 if (copy_to_user((char __user *) arg, device_status,
882 sizeof(struct zcrypt_device_matrix))) {
883 kfree(device_status);
884 return -EFAULT;
885 }
886
887 kfree(device_status);
888 return 0;
889 }
890 case Z90STAT_STATUS_MASK: {
891 char status[AP_DEVICES];
892 zcrypt_status_mask(status);
893 if (copy_to_user((char __user *) arg, status,
894 sizeof(char) * AP_DEVICES))
895 return -EFAULT;
896 return 0;
897 }
898 case Z90STAT_QDEPTH_MASK: {
899 char qdepth[AP_DEVICES];
900 zcrypt_qdepth_mask(qdepth);
901 if (copy_to_user((char __user *) arg, qdepth,
902 sizeof(char) * AP_DEVICES))
903 return -EFAULT;
904 return 0;
905 }
906 case Z90STAT_PERDEV_REQCNT: {
907 int reqcnt[AP_DEVICES];
908 zcrypt_perdev_reqcnt(reqcnt);
909 if (copy_to_user((int __user *) arg, reqcnt,
910 sizeof(int) * AP_DEVICES))
911 return -EFAULT;
912 return 0;
913 }
914 case Z90STAT_REQUESTQ_COUNT:
915 return put_user(zcrypt_requestq_count(), (int __user *) arg);
916 case Z90STAT_PENDINGQ_COUNT:
917 return put_user(zcrypt_pendingq_count(), (int __user *) arg);
918 case Z90STAT_TOTALOPEN_COUNT:
919 return put_user(atomic_read(&zcrypt_open_count),
920 (int __user *) arg);
921 case Z90STAT_DOMAIN_INDEX:
922 return put_user(ap_domain_index, (int __user *) arg);
923 /*
924 * Deprecated ioctls. Don't add another device count ioctl,
925 * you can count them yourself in the user space with the
926 * output of the Z90STAT_STATUS_MASK ioctl.
927 */
928 case ICAZ90STATUS:
929 return zcrypt_ica_status(filp, arg);
930 case Z90STAT_TOTALCOUNT:
931 return put_user(zcrypt_device_count, (int __user *) arg);
932 case Z90STAT_PCICACOUNT:
933 return put_user(zcrypt_count_type(ZCRYPT_PCICA),
934 (int __user *) arg);
935 case Z90STAT_PCICCCOUNT:
936 return put_user(zcrypt_count_type(ZCRYPT_PCICC),
937 (int __user *) arg);
938 case Z90STAT_PCIXCCMCL2COUNT:
939 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2),
940 (int __user *) arg);
941 case Z90STAT_PCIXCCMCL3COUNT:
942 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
943 (int __user *) arg);
944 case Z90STAT_PCIXCCCOUNT:
945 return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) +
946 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3),
947 (int __user *) arg);
948 case Z90STAT_CEX2CCOUNT:
949 return put_user(zcrypt_count_type(ZCRYPT_CEX2C),
950 (int __user *) arg);
951 case Z90STAT_CEX2ACOUNT:
952 return put_user(zcrypt_count_type(ZCRYPT_CEX2A),
953 (int __user *) arg);
954 default:
955 /* unknown ioctl number */
956 return -ENOIOCTLCMD;
957 }
958 }
959
960 #ifdef CONFIG_COMPAT
961 /*
962 * ioctl32 conversion routines
963 */
964 struct compat_ica_rsa_modexpo {
965 compat_uptr_t inputdata;
966 unsigned int inputdatalength;
967 compat_uptr_t outputdata;
968 unsigned int outputdatalength;
969 compat_uptr_t b_key;
970 compat_uptr_t n_modulus;
971 };
972
973 static long trans_modexpo32(struct file *filp, unsigned int cmd,
974 unsigned long arg)
975 {
976 struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg);
977 struct compat_ica_rsa_modexpo mex32;
978 struct ica_rsa_modexpo mex64;
979 long rc;
980
981 if (copy_from_user(&mex32, umex32, sizeof(mex32)))
982 return -EFAULT;
983 mex64.inputdata = compat_ptr(mex32.inputdata);
984 mex64.inputdatalength = mex32.inputdatalength;
985 mex64.outputdata = compat_ptr(mex32.outputdata);
986 mex64.outputdatalength = mex32.outputdatalength;
987 mex64.b_key = compat_ptr(mex32.b_key);
988 mex64.n_modulus = compat_ptr(mex32.n_modulus);
989 do {
990 rc = zcrypt_rsa_modexpo(&mex64);
991 } while (rc == -EAGAIN);
992 /* on failure: retry once again after a requested rescan */
993 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
994 do {
995 rc = zcrypt_rsa_modexpo(&mex64);
996 } while (rc == -EAGAIN);
997 if (rc)
998 return rc;
999 return put_user(mex64.outputdatalength,
1000 &umex32->outputdatalength);
1001 }
1002
1003 struct compat_ica_rsa_modexpo_crt {
1004 compat_uptr_t inputdata;
1005 unsigned int inputdatalength;
1006 compat_uptr_t outputdata;
1007 unsigned int outputdatalength;
1008 compat_uptr_t bp_key;
1009 compat_uptr_t bq_key;
1010 compat_uptr_t np_prime;
1011 compat_uptr_t nq_prime;
1012 compat_uptr_t u_mult_inv;
1013 };
1014
1015 static long trans_modexpo_crt32(struct file *filp, unsigned int cmd,
1016 unsigned long arg)
1017 {
1018 struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg);
1019 struct compat_ica_rsa_modexpo_crt crt32;
1020 struct ica_rsa_modexpo_crt crt64;
1021 long rc;
1022
1023 if (copy_from_user(&crt32, ucrt32, sizeof(crt32)))
1024 return -EFAULT;
1025 crt64.inputdata = compat_ptr(crt32.inputdata);
1026 crt64.inputdatalength = crt32.inputdatalength;
1027 crt64.outputdata= compat_ptr(crt32.outputdata);
1028 crt64.outputdatalength = crt32.outputdatalength;
1029 crt64.bp_key = compat_ptr(crt32.bp_key);
1030 crt64.bq_key = compat_ptr(crt32.bq_key);
1031 crt64.np_prime = compat_ptr(crt32.np_prime);
1032 crt64.nq_prime = compat_ptr(crt32.nq_prime);
1033 crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv);
1034 do {
1035 rc = zcrypt_rsa_crt(&crt64);
1036 } while (rc == -EAGAIN);
1037 /* on failure: retry once again after a requested rescan */
1038 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1039 do {
1040 rc = zcrypt_rsa_crt(&crt64);
1041 } while (rc == -EAGAIN);
1042 if (rc)
1043 return rc;
1044 return put_user(crt64.outputdatalength,
1045 &ucrt32->outputdatalength);
1046 }
1047
1048 struct compat_ica_xcRB {
1049 unsigned short agent_ID;
1050 unsigned int user_defined;
1051 unsigned short request_ID;
1052 unsigned int request_control_blk_length;
1053 unsigned char padding1[16 - sizeof (compat_uptr_t)];
1054 compat_uptr_t request_control_blk_addr;
1055 unsigned int request_data_length;
1056 char padding2[16 - sizeof (compat_uptr_t)];
1057 compat_uptr_t request_data_address;
1058 unsigned int reply_control_blk_length;
1059 char padding3[16 - sizeof (compat_uptr_t)];
1060 compat_uptr_t reply_control_blk_addr;
1061 unsigned int reply_data_length;
1062 char padding4[16 - sizeof (compat_uptr_t)];
1063 compat_uptr_t reply_data_addr;
1064 unsigned short priority_window;
1065 unsigned int status;
1066 } __attribute__((packed));
1067
1068 static long trans_xcRB32(struct file *filp, unsigned int cmd,
1069 unsigned long arg)
1070 {
1071 struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg);
1072 struct compat_ica_xcRB xcRB32;
1073 struct ica_xcRB xcRB64;
1074 long rc;
1075
1076 if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32)))
1077 return -EFAULT;
1078 xcRB64.agent_ID = xcRB32.agent_ID;
1079 xcRB64.user_defined = xcRB32.user_defined;
1080 xcRB64.request_ID = xcRB32.request_ID;
1081 xcRB64.request_control_blk_length =
1082 xcRB32.request_control_blk_length;
1083 xcRB64.request_control_blk_addr =
1084 compat_ptr(xcRB32.request_control_blk_addr);
1085 xcRB64.request_data_length =
1086 xcRB32.request_data_length;
1087 xcRB64.request_data_address =
1088 compat_ptr(xcRB32.request_data_address);
1089 xcRB64.reply_control_blk_length =
1090 xcRB32.reply_control_blk_length;
1091 xcRB64.reply_control_blk_addr =
1092 compat_ptr(xcRB32.reply_control_blk_addr);
1093 xcRB64.reply_data_length = xcRB32.reply_data_length;
1094 xcRB64.reply_data_addr =
1095 compat_ptr(xcRB32.reply_data_addr);
1096 xcRB64.priority_window = xcRB32.priority_window;
1097 xcRB64.status = xcRB32.status;
1098 do {
1099 rc = zcrypt_send_cprb(&xcRB64);
1100 } while (rc == -EAGAIN);
1101 /* on failure: retry once again after a requested rescan */
1102 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1103 do {
1104 rc = zcrypt_send_cprb(&xcRB64);
1105 } while (rc == -EAGAIN);
1106 xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length;
1107 xcRB32.reply_data_length = xcRB64.reply_data_length;
1108 xcRB32.status = xcRB64.status;
1109 if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32)))
1110 return -EFAULT;
1111 return rc;
1112 }
1113
1114 static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd,
1115 unsigned long arg)
1116 {
1117 if (cmd == ICARSAMODEXPO)
1118 return trans_modexpo32(filp, cmd, arg);
1119 if (cmd == ICARSACRT)
1120 return trans_modexpo_crt32(filp, cmd, arg);
1121 if (cmd == ZSECSENDCPRB)
1122 return trans_xcRB32(filp, cmd, arg);
1123 return zcrypt_unlocked_ioctl(filp, cmd, arg);
1124 }
1125 #endif
1126
1127 /*
1128 * Misc device file operations.
1129 */
1130 static const struct file_operations zcrypt_fops = {
1131 .owner = THIS_MODULE,
1132 .read = zcrypt_read,
1133 .write = zcrypt_write,
1134 .unlocked_ioctl = zcrypt_unlocked_ioctl,
1135 #ifdef CONFIG_COMPAT
1136 .compat_ioctl = zcrypt_compat_ioctl,
1137 #endif
1138 .open = zcrypt_open,
1139 .release = zcrypt_release,
1140 .llseek = no_llseek,
1141 };
1142
1143 /*
1144 * Misc device.
1145 */
1146 static struct miscdevice zcrypt_misc_device = {
1147 .minor = MISC_DYNAMIC_MINOR,
1148 .name = "z90crypt",
1149 .fops = &zcrypt_fops,
1150 };
1151
1152 /*
1153 * Deprecated /proc entry support.
1154 */
1155 static struct proc_dir_entry *zcrypt_entry;
1156
1157 static void sprintcl(struct seq_file *m, unsigned char *addr, unsigned int len)
1158 {
1159 int i;
1160
1161 for (i = 0; i < len; i++)
1162 seq_printf(m, "%01x", (unsigned int) addr[i]);
1163 seq_putc(m, ' ');
1164 }
1165
1166 static void sprintrw(struct seq_file *m, unsigned char *addr, unsigned int len)
1167 {
1168 int inl, c, cx;
1169
1170 seq_printf(m, " ");
1171 inl = 0;
1172 for (c = 0; c < (len / 16); c++) {
1173 sprintcl(m, addr+inl, 16);
1174 inl += 16;
1175 }
1176 cx = len%16;
1177 if (cx) {
1178 sprintcl(m, addr+inl, cx);
1179 inl += cx;
1180 }
1181 seq_putc(m, '\n');
1182 }
1183
1184 static void sprinthx(unsigned char *title, struct seq_file *m,
1185 unsigned char *addr, unsigned int len)
1186 {
1187 int inl, r, rx;
1188
1189 seq_printf(m, "\n%s\n", title);
1190 inl = 0;
1191 for (r = 0; r < (len / 64); r++) {
1192 sprintrw(m, addr+inl, 64);
1193 inl += 64;
1194 }
1195 rx = len % 64;
1196 if (rx) {
1197 sprintrw(m, addr+inl, rx);
1198 inl += rx;
1199 }
1200 seq_putc(m, '\n');
1201 }
1202
1203 static void sprinthx4(unsigned char *title, struct seq_file *m,
1204 unsigned int *array, unsigned int len)
1205 {
1206 seq_printf(m, "\n%s\n", title);
1207 seq_hex_dump(m, " ", DUMP_PREFIX_NONE, 32, 4, array, len, false);
1208 seq_putc(m, '\n');
1209 }
1210
1211 static int zcrypt_proc_show(struct seq_file *m, void *v)
1212 {
1213 char workarea[sizeof(int) * AP_DEVICES];
1214
1215 seq_printf(m, "\nzcrypt version: %d.%d.%d\n",
1216 ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT);
1217 seq_printf(m, "Cryptographic domain: %d\n", ap_domain_index);
1218 seq_printf(m, "Total device count: %d\n", zcrypt_device_count);
1219 seq_printf(m, "PCICA count: %d\n", zcrypt_count_type(ZCRYPT_PCICA));
1220 seq_printf(m, "PCICC count: %d\n", zcrypt_count_type(ZCRYPT_PCICC));
1221 seq_printf(m, "PCIXCC MCL2 count: %d\n",
1222 zcrypt_count_type(ZCRYPT_PCIXCC_MCL2));
1223 seq_printf(m, "PCIXCC MCL3 count: %d\n",
1224 zcrypt_count_type(ZCRYPT_PCIXCC_MCL3));
1225 seq_printf(m, "CEX2C count: %d\n", zcrypt_count_type(ZCRYPT_CEX2C));
1226 seq_printf(m, "CEX2A count: %d\n", zcrypt_count_type(ZCRYPT_CEX2A));
1227 seq_printf(m, "CEX3C count: %d\n", zcrypt_count_type(ZCRYPT_CEX3C));
1228 seq_printf(m, "CEX3A count: %d\n", zcrypt_count_type(ZCRYPT_CEX3A));
1229 seq_printf(m, "requestq count: %d\n", zcrypt_requestq_count());
1230 seq_printf(m, "pendingq count: %d\n", zcrypt_pendingq_count());
1231 seq_printf(m, "Total open handles: %d\n\n",
1232 atomic_read(&zcrypt_open_count));
1233 zcrypt_status_mask(workarea);
1234 sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) "
1235 "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A",
1236 m, workarea, AP_DEVICES);
1237 zcrypt_qdepth_mask(workarea);
1238 sprinthx("Waiting work element counts", m, workarea, AP_DEVICES);
1239 zcrypt_perdev_reqcnt((int *) workarea);
1240 sprinthx4("Per-device successfully completed request counts",
1241 m, (unsigned int *) workarea, AP_DEVICES);
1242 return 0;
1243 }
1244
1245 static int zcrypt_proc_open(struct inode *inode, struct file *file)
1246 {
1247 return single_open(file, zcrypt_proc_show, NULL);
1248 }
1249
1250 static void zcrypt_disable_card(int index)
1251 {
1252 struct zcrypt_card *zc;
1253 struct zcrypt_queue *zq;
1254
1255 spin_lock(&zcrypt_list_lock);
1256 for_each_zcrypt_card(zc) {
1257 for_each_zcrypt_queue(zq, zc) {
1258 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1259 continue;
1260 zq->online = 0;
1261 ap_flush_queue(zq->queue);
1262 }
1263 }
1264 spin_unlock(&zcrypt_list_lock);
1265 }
1266
1267 static void zcrypt_enable_card(int index)
1268 {
1269 struct zcrypt_card *zc;
1270 struct zcrypt_queue *zq;
1271
1272 spin_lock(&zcrypt_list_lock);
1273 for_each_zcrypt_card(zc) {
1274 for_each_zcrypt_queue(zq, zc) {
1275 if (AP_QID_QUEUE(zq->queue->qid) != ap_domain_index)
1276 continue;
1277 zq->online = 1;
1278 ap_flush_queue(zq->queue);
1279 }
1280 }
1281 spin_unlock(&zcrypt_list_lock);
1282 }
1283
1284 static ssize_t zcrypt_proc_write(struct file *file, const char __user *buffer,
1285 size_t count, loff_t *pos)
1286 {
1287 unsigned char *lbuf, *ptr;
1288 size_t local_count;
1289 int j;
1290
1291 if (count <= 0)
1292 return 0;
1293
1294 #define LBUFSIZE 1200UL
1295 lbuf = kmalloc(LBUFSIZE, GFP_KERNEL);
1296 if (!lbuf)
1297 return 0;
1298
1299 local_count = min(LBUFSIZE - 1, count);
1300 if (copy_from_user(lbuf, buffer, local_count) != 0) {
1301 kfree(lbuf);
1302 return -EFAULT;
1303 }
1304 lbuf[local_count] = '\0';
1305
1306 ptr = strstr(lbuf, "Online devices");
1307 if (!ptr)
1308 goto out;
1309 ptr = strstr(ptr, "\n");
1310 if (!ptr)
1311 goto out;
1312 ptr++;
1313
1314 if (strstr(ptr, "Waiting work element counts") == NULL)
1315 goto out;
1316
1317 for (j = 0; j < 64 && *ptr; ptr++) {
1318 /*
1319 * '0' for no device, '1' for PCICA, '2' for PCICC,
1320 * '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3,
1321 * '5' for CEX2C and '6' for CEX2A'
1322 * '7' for CEX3C and '8' for CEX3A
1323 */
1324 if (*ptr >= '0' && *ptr <= '8')
1325 j++;
1326 else if (*ptr == 'd' || *ptr == 'D')
1327 zcrypt_disable_card(j++);
1328 else if (*ptr == 'e' || *ptr == 'E')
1329 zcrypt_enable_card(j++);
1330 else if (*ptr != ' ' && *ptr != '\t')
1331 break;
1332 }
1333 out:
1334 kfree(lbuf);
1335 return count;
1336 }
1337
1338 static const struct file_operations zcrypt_proc_fops = {
1339 .owner = THIS_MODULE,
1340 .open = zcrypt_proc_open,
1341 .read = seq_read,
1342 .llseek = seq_lseek,
1343 .release = single_release,
1344 .write = zcrypt_proc_write,
1345 };
1346
1347 static int zcrypt_rng_device_count;
1348 static u32 *zcrypt_rng_buffer;
1349 static int zcrypt_rng_buffer_index;
1350 static DEFINE_MUTEX(zcrypt_rng_mutex);
1351
1352 static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
1353 {
1354 int rc;
1355
1356 /*
1357 * We don't need locking here because the RNG API guarantees serialized
1358 * read method calls.
1359 */
1360 if (zcrypt_rng_buffer_index == 0) {
1361 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1362 /* on failure: retry once again after a requested rescan */
1363 if ((rc == -ENODEV) && (zcrypt_process_rescan()))
1364 rc = zcrypt_rng((char *) zcrypt_rng_buffer);
1365 if (rc < 0)
1366 return -EIO;
1367 zcrypt_rng_buffer_index = rc / sizeof *data;
1368 }
1369 *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index];
1370 return sizeof *data;
1371 }
1372
1373 static struct hwrng zcrypt_rng_dev = {
1374 .name = "zcrypt",
1375 .data_read = zcrypt_rng_data_read,
1376 .quality = 990,
1377 };
1378
1379 int zcrypt_rng_device_add(void)
1380 {
1381 int rc = 0;
1382
1383 mutex_lock(&zcrypt_rng_mutex);
1384 if (zcrypt_rng_device_count == 0) {
1385 zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL);
1386 if (!zcrypt_rng_buffer) {
1387 rc = -ENOMEM;
1388 goto out;
1389 }
1390 zcrypt_rng_buffer_index = 0;
1391 if (!zcrypt_hwrng_seed)
1392 zcrypt_rng_dev.quality = 0;
1393 rc = hwrng_register(&zcrypt_rng_dev);
1394 if (rc)
1395 goto out_free;
1396 zcrypt_rng_device_count = 1;
1397 } else
1398 zcrypt_rng_device_count++;
1399 mutex_unlock(&zcrypt_rng_mutex);
1400 return 0;
1401
1402 out_free:
1403 free_page((unsigned long) zcrypt_rng_buffer);
1404 out:
1405 mutex_unlock(&zcrypt_rng_mutex);
1406 return rc;
1407 }
1408
1409 void zcrypt_rng_device_remove(void)
1410 {
1411 mutex_lock(&zcrypt_rng_mutex);
1412 zcrypt_rng_device_count--;
1413 if (zcrypt_rng_device_count == 0) {
1414 hwrng_unregister(&zcrypt_rng_dev);
1415 free_page((unsigned long) zcrypt_rng_buffer);
1416 }
1417 mutex_unlock(&zcrypt_rng_mutex);
1418 }
1419
1420 int __init zcrypt_debug_init(void)
1421 {
1422 zcrypt_dbf_root = debugfs_create_dir("zcrypt", NULL);
1423 zcrypt_dbf_info = debug_register("zcrypt", 1, 1,
1424 DBF_MAX_SPRINTF_ARGS * sizeof(long));
1425 debug_register_view(zcrypt_dbf_info, &debug_sprintf_view);
1426 debug_set_level(zcrypt_dbf_info, DBF_ERR);
1427
1428 return 0;
1429 }
1430
1431 void zcrypt_debug_exit(void)
1432 {
1433 debugfs_remove(zcrypt_dbf_root);
1434 debug_unregister(zcrypt_dbf_info);
1435 }
1436
1437 /**
1438 * zcrypt_api_init(): Module initialization.
1439 *
1440 * The module initialization code.
1441 */
1442 int __init zcrypt_api_init(void)
1443 {
1444 int rc;
1445
1446 rc = zcrypt_debug_init();
1447 if (rc)
1448 goto out;
1449
1450 atomic_set(&zcrypt_rescan_req, 0);
1451
1452 /* Register the request sprayer. */
1453 rc = misc_register(&zcrypt_misc_device);
1454 if (rc < 0)
1455 goto out;
1456
1457 /* Set up the proc file system */
1458 zcrypt_entry = proc_create("driver/z90crypt", 0644, NULL,
1459 &zcrypt_proc_fops);
1460 if (!zcrypt_entry) {
1461 rc = -ENOMEM;
1462 goto out_misc;
1463 }
1464
1465 zcrypt_msgtype6_init();
1466 zcrypt_msgtype50_init();
1467 return 0;
1468
1469 out_misc:
1470 misc_deregister(&zcrypt_misc_device);
1471 out:
1472 return rc;
1473 }
1474
1475 /**
1476 * zcrypt_api_exit(): Module termination.
1477 *
1478 * The module termination code.
1479 */
1480 void __exit zcrypt_api_exit(void)
1481 {
1482 remove_proc_entry("driver/z90crypt", NULL);
1483 misc_deregister(&zcrypt_misc_device);
1484 zcrypt_msgtype6_exit();
1485 zcrypt_msgtype50_exit();
1486 zcrypt_debug_exit();
1487 }
1488
1489 module_init(zcrypt_api_init);
1490 module_exit(zcrypt_api_exit);
Linux with added FPC-III support