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Linux 4.16.11
[linux/fpc-iii.git] / drivers / s390 / crypto / zcrypt_api.c
blobce15f101ee282701cdf55ac0ddba557001c737fc
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);
Linux with added FPC-III support