Commit | Line | Data |
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2dbc2418 MS |
1 | /* |
2 | * linux/drivers/s390/crypto/zcrypt_api.c | |
3 | * | |
5432114b | 4 | * zcrypt 2.1.0 |
2dbc2418 MS |
5 | * |
6 | * Copyright (C) 2001, 2006 IBM Corporation | |
7 | * Author(s): Robert Burroughs | |
8 | * Eric Rossman (edrossma@us.ibm.com) | |
9 | * Cornelia Huck <cornelia.huck@de.ibm.com> | |
10 | * | |
11 | * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com) | |
12 | * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com> | |
13 | * Ralph Wuerthner <rwuerthn@de.ibm.com> | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or modify | |
16 | * it under the terms of the GNU General Public License as published by | |
17 | * the Free Software Foundation; either version 2, or (at your option) | |
18 | * any later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
28 | */ | |
29 | ||
30 | #include <linux/module.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/miscdevice.h> | |
34 | #include <linux/fs.h> | |
35 | #include <linux/proc_fs.h> | |
36 | #include <linux/compat.h> | |
37 | #include <asm/atomic.h> | |
38 | #include <asm/uaccess.h> | |
2f7c8bd6 | 39 | #include <linux/hw_random.h> |
2dbc2418 MS |
40 | |
41 | #include "zcrypt_api.h" | |
42 | ||
1749a81d | 43 | /* |
2dbc2418 MS |
44 | * Module description. |
45 | */ | |
46 | MODULE_AUTHOR("IBM Corporation"); | |
47 | MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " | |
48 | "Copyright 2001, 2006 IBM Corporation"); | |
49 | MODULE_LICENSE("GPL"); | |
50 | ||
51 | static DEFINE_SPINLOCK(zcrypt_device_lock); | |
52 | static LIST_HEAD(zcrypt_device_list); | |
53 | static int zcrypt_device_count = 0; | |
54 | static atomic_t zcrypt_open_count = ATOMIC_INIT(0); | |
55 | ||
2f7c8bd6 RW |
56 | static int zcrypt_rng_device_add(void); |
57 | static void zcrypt_rng_device_remove(void); | |
58 | ||
1749a81d | 59 | /* |
2dbc2418 MS |
60 | * Device attributes common for all crypto devices. |
61 | */ | |
62 | static ssize_t zcrypt_type_show(struct device *dev, | |
63 | struct device_attribute *attr, char *buf) | |
64 | { | |
65 | struct zcrypt_device *zdev = to_ap_dev(dev)->private; | |
66 | return snprintf(buf, PAGE_SIZE, "%s\n", zdev->type_string); | |
67 | } | |
68 | ||
69 | static DEVICE_ATTR(type, 0444, zcrypt_type_show, NULL); | |
70 | ||
71 | static ssize_t zcrypt_online_show(struct device *dev, | |
72 | struct device_attribute *attr, char *buf) | |
73 | { | |
74 | struct zcrypt_device *zdev = to_ap_dev(dev)->private; | |
75 | return snprintf(buf, PAGE_SIZE, "%d\n", zdev->online); | |
76 | } | |
77 | ||
78 | static ssize_t zcrypt_online_store(struct device *dev, | |
79 | struct device_attribute *attr, | |
80 | const char *buf, size_t count) | |
81 | { | |
82 | struct zcrypt_device *zdev = to_ap_dev(dev)->private; | |
83 | int online; | |
84 | ||
85 | if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1) | |
86 | return -EINVAL; | |
87 | zdev->online = online; | |
88 | if (!online) | |
89 | ap_flush_queue(zdev->ap_dev); | |
90 | return count; | |
91 | } | |
92 | ||
93 | static DEVICE_ATTR(online, 0644, zcrypt_online_show, zcrypt_online_store); | |
94 | ||
95 | static struct attribute * zcrypt_device_attrs[] = { | |
96 | &dev_attr_type.attr, | |
97 | &dev_attr_online.attr, | |
98 | NULL, | |
99 | }; | |
100 | ||
101 | static struct attribute_group zcrypt_device_attr_group = { | |
102 | .attrs = zcrypt_device_attrs, | |
103 | }; | |
104 | ||
105 | /** | |
1749a81d FB |
106 | * __zcrypt_increase_preference(): Increase preference of a crypto device. |
107 | * @zdev: Pointer the crypto device | |
108 | * | |
2dbc2418 MS |
109 | * Move the device towards the head of the device list. |
110 | * Need to be called while holding the zcrypt device list lock. | |
111 | * Note: cards with speed_rating of 0 are kept at the end of the list. | |
112 | */ | |
113 | static void __zcrypt_increase_preference(struct zcrypt_device *zdev) | |
114 | { | |
115 | struct zcrypt_device *tmp; | |
116 | struct list_head *l; | |
117 | ||
118 | if (zdev->speed_rating == 0) | |
119 | return; | |
120 | for (l = zdev->list.prev; l != &zcrypt_device_list; l = l->prev) { | |
121 | tmp = list_entry(l, struct zcrypt_device, list); | |
122 | if ((tmp->request_count + 1) * tmp->speed_rating <= | |
123 | (zdev->request_count + 1) * zdev->speed_rating && | |
124 | tmp->speed_rating != 0) | |
125 | break; | |
126 | } | |
127 | if (l == zdev->list.prev) | |
128 | return; | |
129 | /* Move zdev behind l */ | |
130 | list_del(&zdev->list); | |
131 | list_add(&zdev->list, l); | |
132 | } | |
133 | ||
134 | /** | |
1749a81d FB |
135 | * __zcrypt_decrease_preference(): Decrease preference of a crypto device. |
136 | * @zdev: Pointer to a crypto device. | |
137 | * | |
2dbc2418 MS |
138 | * Move the device towards the tail of the device list. |
139 | * Need to be called while holding the zcrypt device list lock. | |
140 | * Note: cards with speed_rating of 0 are kept at the end of the list. | |
141 | */ | |
142 | static void __zcrypt_decrease_preference(struct zcrypt_device *zdev) | |
143 | { | |
144 | struct zcrypt_device *tmp; | |
145 | struct list_head *l; | |
146 | ||
147 | if (zdev->speed_rating == 0) | |
148 | return; | |
149 | for (l = zdev->list.next; l != &zcrypt_device_list; l = l->next) { | |
150 | tmp = list_entry(l, struct zcrypt_device, list); | |
151 | if ((tmp->request_count + 1) * tmp->speed_rating > | |
152 | (zdev->request_count + 1) * zdev->speed_rating || | |
153 | tmp->speed_rating == 0) | |
154 | break; | |
155 | } | |
156 | if (l == zdev->list.next) | |
157 | return; | |
158 | /* Move zdev before l */ | |
159 | list_del(&zdev->list); | |
160 | list_add_tail(&zdev->list, l); | |
161 | } | |
162 | ||
163 | static void zcrypt_device_release(struct kref *kref) | |
164 | { | |
165 | struct zcrypt_device *zdev = | |
166 | container_of(kref, struct zcrypt_device, refcount); | |
167 | zcrypt_device_free(zdev); | |
168 | } | |
169 | ||
170 | void zcrypt_device_get(struct zcrypt_device *zdev) | |
171 | { | |
172 | kref_get(&zdev->refcount); | |
173 | } | |
174 | EXPORT_SYMBOL(zcrypt_device_get); | |
175 | ||
176 | int zcrypt_device_put(struct zcrypt_device *zdev) | |
177 | { | |
178 | return kref_put(&zdev->refcount, zcrypt_device_release); | |
179 | } | |
180 | EXPORT_SYMBOL(zcrypt_device_put); | |
181 | ||
182 | struct zcrypt_device *zcrypt_device_alloc(size_t max_response_size) | |
183 | { | |
184 | struct zcrypt_device *zdev; | |
185 | ||
186 | zdev = kzalloc(sizeof(struct zcrypt_device), GFP_KERNEL); | |
187 | if (!zdev) | |
188 | return NULL; | |
189 | zdev->reply.message = kmalloc(max_response_size, GFP_KERNEL); | |
190 | if (!zdev->reply.message) | |
191 | goto out_free; | |
192 | zdev->reply.length = max_response_size; | |
193 | spin_lock_init(&zdev->lock); | |
194 | INIT_LIST_HEAD(&zdev->list); | |
195 | return zdev; | |
196 | ||
197 | out_free: | |
198 | kfree(zdev); | |
199 | return NULL; | |
200 | } | |
201 | EXPORT_SYMBOL(zcrypt_device_alloc); | |
202 | ||
203 | void zcrypt_device_free(struct zcrypt_device *zdev) | |
204 | { | |
205 | kfree(zdev->reply.message); | |
206 | kfree(zdev); | |
207 | } | |
208 | EXPORT_SYMBOL(zcrypt_device_free); | |
209 | ||
210 | /** | |
1749a81d FB |
211 | * zcrypt_device_register() - Register a crypto device. |
212 | * @zdev: Pointer to a crypto device | |
213 | * | |
214 | * Register a crypto device. Returns 0 if successful. | |
2dbc2418 MS |
215 | */ |
216 | int zcrypt_device_register(struct zcrypt_device *zdev) | |
217 | { | |
218 | int rc; | |
219 | ||
220 | rc = sysfs_create_group(&zdev->ap_dev->device.kobj, | |
221 | &zcrypt_device_attr_group); | |
222 | if (rc) | |
223 | goto out; | |
224 | get_device(&zdev->ap_dev->device); | |
225 | kref_init(&zdev->refcount); | |
226 | spin_lock_bh(&zcrypt_device_lock); | |
227 | zdev->online = 1; /* New devices are online by default. */ | |
228 | list_add_tail(&zdev->list, &zcrypt_device_list); | |
229 | __zcrypt_increase_preference(zdev); | |
230 | zcrypt_device_count++; | |
231 | spin_unlock_bh(&zcrypt_device_lock); | |
2f7c8bd6 RW |
232 | if (zdev->ops->rng) { |
233 | rc = zcrypt_rng_device_add(); | |
234 | if (rc) | |
235 | goto out_unregister; | |
236 | } | |
237 | return 0; | |
238 | ||
239 | out_unregister: | |
240 | spin_lock_bh(&zcrypt_device_lock); | |
241 | zcrypt_device_count--; | |
242 | list_del_init(&zdev->list); | |
243 | spin_unlock_bh(&zcrypt_device_lock); | |
244 | sysfs_remove_group(&zdev->ap_dev->device.kobj, | |
245 | &zcrypt_device_attr_group); | |
246 | put_device(&zdev->ap_dev->device); | |
247 | zcrypt_device_put(zdev); | |
2dbc2418 MS |
248 | out: |
249 | return rc; | |
250 | } | |
251 | EXPORT_SYMBOL(zcrypt_device_register); | |
252 | ||
253 | /** | |
1749a81d FB |
254 | * zcrypt_device_unregister(): Unregister a crypto device. |
255 | * @zdev: Pointer to crypto device | |
256 | * | |
2dbc2418 MS |
257 | * Unregister a crypto device. |
258 | */ | |
259 | void zcrypt_device_unregister(struct zcrypt_device *zdev) | |
260 | { | |
2f7c8bd6 RW |
261 | if (zdev->ops->rng) |
262 | zcrypt_rng_device_remove(); | |
2dbc2418 MS |
263 | spin_lock_bh(&zcrypt_device_lock); |
264 | zcrypt_device_count--; | |
265 | list_del_init(&zdev->list); | |
266 | spin_unlock_bh(&zcrypt_device_lock); | |
267 | sysfs_remove_group(&zdev->ap_dev->device.kobj, | |
268 | &zcrypt_device_attr_group); | |
269 | put_device(&zdev->ap_dev->device); | |
270 | zcrypt_device_put(zdev); | |
271 | } | |
272 | EXPORT_SYMBOL(zcrypt_device_unregister); | |
273 | ||
274 | /** | |
1749a81d FB |
275 | * zcrypt_read (): Not supported beyond zcrypt 1.3.1. |
276 | * | |
277 | * This function is not supported beyond zcrypt 1.3.1. | |
2dbc2418 MS |
278 | */ |
279 | static ssize_t zcrypt_read(struct file *filp, char __user *buf, | |
280 | size_t count, loff_t *f_pos) | |
281 | { | |
282 | return -EPERM; | |
283 | } | |
284 | ||
285 | /** | |
1749a81d FB |
286 | * zcrypt_write(): Not allowed. |
287 | * | |
2dbc2418 MS |
288 | * Write is is not allowed |
289 | */ | |
290 | static ssize_t zcrypt_write(struct file *filp, const char __user *buf, | |
291 | size_t count, loff_t *f_pos) | |
292 | { | |
293 | return -EPERM; | |
294 | } | |
295 | ||
296 | /** | |
1749a81d FB |
297 | * zcrypt_open(): Count number of users. |
298 | * | |
299 | * Device open function to count number of users. | |
2dbc2418 MS |
300 | */ |
301 | static int zcrypt_open(struct inode *inode, struct file *filp) | |
302 | { | |
303 | atomic_inc(&zcrypt_open_count); | |
304 | return 0; | |
305 | } | |
306 | ||
1749a81d FB |
307 | /** |
308 | * zcrypt_release(): Count number of users. | |
309 | * | |
310 | * Device close function to count number of users. | |
311 | */ | |
2dbc2418 MS |
312 | static int zcrypt_release(struct inode *inode, struct file *filp) |
313 | { | |
314 | atomic_dec(&zcrypt_open_count); | |
315 | return 0; | |
316 | } | |
317 | ||
1749a81d | 318 | /* |
2dbc2418 MS |
319 | * zcrypt ioctls. |
320 | */ | |
321 | static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex) | |
322 | { | |
323 | struct zcrypt_device *zdev; | |
324 | int rc; | |
325 | ||
326 | if (mex->outputdatalength < mex->inputdatalength) | |
327 | return -EINVAL; | |
1749a81d | 328 | /* |
2dbc2418 MS |
329 | * As long as outputdatalength is big enough, we can set the |
330 | * outputdatalength equal to the inputdatalength, since that is the | |
331 | * number of bytes we will copy in any case | |
332 | */ | |
333 | mex->outputdatalength = mex->inputdatalength; | |
334 | ||
335 | spin_lock_bh(&zcrypt_device_lock); | |
336 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
337 | if (!zdev->online || | |
338 | !zdev->ops->rsa_modexpo || | |
339 | zdev->min_mod_size > mex->inputdatalength || | |
340 | zdev->max_mod_size < mex->inputdatalength) | |
341 | continue; | |
342 | zcrypt_device_get(zdev); | |
343 | get_device(&zdev->ap_dev->device); | |
344 | zdev->request_count++; | |
345 | __zcrypt_decrease_preference(zdev); | |
2dbc2418 | 346 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
43a867a2 | 347 | spin_unlock_bh(&zcrypt_device_lock); |
2dbc2418 | 348 | rc = zdev->ops->rsa_modexpo(zdev, mex); |
43a867a2 | 349 | spin_lock_bh(&zcrypt_device_lock); |
2dbc2418 MS |
350 | module_put(zdev->ap_dev->drv->driver.owner); |
351 | } | |
352 | else | |
353 | rc = -EAGAIN; | |
2dbc2418 MS |
354 | zdev->request_count--; |
355 | __zcrypt_increase_preference(zdev); | |
356 | put_device(&zdev->ap_dev->device); | |
357 | zcrypt_device_put(zdev); | |
358 | spin_unlock_bh(&zcrypt_device_lock); | |
359 | return rc; | |
360 | } | |
361 | spin_unlock_bh(&zcrypt_device_lock); | |
362 | return -ENODEV; | |
363 | } | |
364 | ||
365 | static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt) | |
366 | { | |
367 | struct zcrypt_device *zdev; | |
368 | unsigned long long z1, z2, z3; | |
369 | int rc, copied; | |
370 | ||
371 | if (crt->outputdatalength < crt->inputdatalength || | |
372 | (crt->inputdatalength & 1)) | |
373 | return -EINVAL; | |
1749a81d | 374 | /* |
2dbc2418 MS |
375 | * As long as outputdatalength is big enough, we can set the |
376 | * outputdatalength equal to the inputdatalength, since that is the | |
377 | * number of bytes we will copy in any case | |
378 | */ | |
379 | crt->outputdatalength = crt->inputdatalength; | |
380 | ||
381 | copied = 0; | |
382 | restart: | |
383 | spin_lock_bh(&zcrypt_device_lock); | |
384 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
385 | if (!zdev->online || | |
386 | !zdev->ops->rsa_modexpo_crt || | |
387 | zdev->min_mod_size > crt->inputdatalength || | |
388 | zdev->max_mod_size < crt->inputdatalength) | |
389 | continue; | |
390 | if (zdev->short_crt && crt->inputdatalength > 240) { | |
1749a81d | 391 | /* |
2dbc2418 MS |
392 | * Check inputdata for leading zeros for cards |
393 | * that can't handle np_prime, bp_key, or | |
394 | * u_mult_inv > 128 bytes. | |
395 | */ | |
396 | if (copied == 0) { | |
397 | int len; | |
398 | spin_unlock_bh(&zcrypt_device_lock); | |
399 | /* len is max 256 / 2 - 120 = 8 */ | |
400 | len = crt->inputdatalength / 2 - 120; | |
401 | z1 = z2 = z3 = 0; | |
402 | if (copy_from_user(&z1, crt->np_prime, len) || | |
403 | copy_from_user(&z2, crt->bp_key, len) || | |
404 | copy_from_user(&z3, crt->u_mult_inv, len)) | |
405 | return -EFAULT; | |
406 | copied = 1; | |
1749a81d | 407 | /* |
2dbc2418 MS |
408 | * We have to restart device lookup - |
409 | * the device list may have changed by now. | |
410 | */ | |
411 | goto restart; | |
412 | } | |
413 | if (z1 != 0ULL || z2 != 0ULL || z3 != 0ULL) | |
414 | /* The device can't handle this request. */ | |
415 | continue; | |
416 | } | |
417 | zcrypt_device_get(zdev); | |
418 | get_device(&zdev->ap_dev->device); | |
419 | zdev->request_count++; | |
420 | __zcrypt_decrease_preference(zdev); | |
2dbc2418 | 421 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
43a867a2 | 422 | spin_unlock_bh(&zcrypt_device_lock); |
2dbc2418 | 423 | rc = zdev->ops->rsa_modexpo_crt(zdev, crt); |
43a867a2 | 424 | spin_lock_bh(&zcrypt_device_lock); |
2dbc2418 MS |
425 | module_put(zdev->ap_dev->drv->driver.owner); |
426 | } | |
427 | else | |
428 | rc = -EAGAIN; | |
2dbc2418 MS |
429 | zdev->request_count--; |
430 | __zcrypt_increase_preference(zdev); | |
431 | put_device(&zdev->ap_dev->device); | |
432 | zcrypt_device_put(zdev); | |
433 | spin_unlock_bh(&zcrypt_device_lock); | |
434 | return rc; | |
435 | } | |
436 | spin_unlock_bh(&zcrypt_device_lock); | |
437 | return -ENODEV; | |
438 | } | |
439 | ||
5432114b RW |
440 | static long zcrypt_send_cprb(struct ica_xcRB *xcRB) |
441 | { | |
442 | struct zcrypt_device *zdev; | |
443 | int rc; | |
444 | ||
445 | spin_lock_bh(&zcrypt_device_lock); | |
446 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
447 | if (!zdev->online || !zdev->ops->send_cprb || | |
448 | (xcRB->user_defined != AUTOSELECT && | |
449 | AP_QID_DEVICE(zdev->ap_dev->qid) != xcRB->user_defined) | |
450 | ) | |
451 | continue; | |
452 | zcrypt_device_get(zdev); | |
453 | get_device(&zdev->ap_dev->device); | |
454 | zdev->request_count++; | |
455 | __zcrypt_decrease_preference(zdev); | |
5432114b | 456 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
43a867a2 | 457 | spin_unlock_bh(&zcrypt_device_lock); |
5432114b | 458 | rc = zdev->ops->send_cprb(zdev, xcRB); |
43a867a2 | 459 | spin_lock_bh(&zcrypt_device_lock); |
5432114b RW |
460 | module_put(zdev->ap_dev->drv->driver.owner); |
461 | } | |
462 | else | |
463 | rc = -EAGAIN; | |
5432114b RW |
464 | zdev->request_count--; |
465 | __zcrypt_increase_preference(zdev); | |
466 | put_device(&zdev->ap_dev->device); | |
467 | zcrypt_device_put(zdev); | |
468 | spin_unlock_bh(&zcrypt_device_lock); | |
469 | return rc; | |
470 | } | |
471 | spin_unlock_bh(&zcrypt_device_lock); | |
472 | return -ENODEV; | |
473 | } | |
474 | ||
2f7c8bd6 RW |
475 | static long zcrypt_rng(char *buffer) |
476 | { | |
477 | struct zcrypt_device *zdev; | |
478 | int rc; | |
479 | ||
480 | spin_lock_bh(&zcrypt_device_lock); | |
481 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
482 | if (!zdev->online || !zdev->ops->rng) | |
483 | continue; | |
484 | zcrypt_device_get(zdev); | |
485 | get_device(&zdev->ap_dev->device); | |
486 | zdev->request_count++; | |
487 | __zcrypt_decrease_preference(zdev); | |
488 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { | |
489 | spin_unlock_bh(&zcrypt_device_lock); | |
490 | rc = zdev->ops->rng(zdev, buffer); | |
491 | spin_lock_bh(&zcrypt_device_lock); | |
492 | module_put(zdev->ap_dev->drv->driver.owner); | |
493 | } else | |
494 | rc = -EAGAIN; | |
495 | zdev->request_count--; | |
496 | __zcrypt_increase_preference(zdev); | |
497 | put_device(&zdev->ap_dev->device); | |
498 | zcrypt_device_put(zdev); | |
499 | spin_unlock_bh(&zcrypt_device_lock); | |
500 | return rc; | |
501 | } | |
502 | spin_unlock_bh(&zcrypt_device_lock); | |
503 | return -ENODEV; | |
504 | } | |
505 | ||
2dbc2418 MS |
506 | static void zcrypt_status_mask(char status[AP_DEVICES]) |
507 | { | |
508 | struct zcrypt_device *zdev; | |
509 | ||
510 | memset(status, 0, sizeof(char) * AP_DEVICES); | |
511 | spin_lock_bh(&zcrypt_device_lock); | |
512 | list_for_each_entry(zdev, &zcrypt_device_list, list) | |
513 | status[AP_QID_DEVICE(zdev->ap_dev->qid)] = | |
514 | zdev->online ? zdev->user_space_type : 0x0d; | |
515 | spin_unlock_bh(&zcrypt_device_lock); | |
516 | } | |
517 | ||
518 | static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES]) | |
519 | { | |
520 | struct zcrypt_device *zdev; | |
521 | ||
522 | memset(qdepth, 0, sizeof(char) * AP_DEVICES); | |
523 | spin_lock_bh(&zcrypt_device_lock); | |
524 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
525 | spin_lock(&zdev->ap_dev->lock); | |
526 | qdepth[AP_QID_DEVICE(zdev->ap_dev->qid)] = | |
527 | zdev->ap_dev->pendingq_count + | |
528 | zdev->ap_dev->requestq_count; | |
529 | spin_unlock(&zdev->ap_dev->lock); | |
530 | } | |
531 | spin_unlock_bh(&zcrypt_device_lock); | |
532 | } | |
533 | ||
534 | static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES]) | |
535 | { | |
536 | struct zcrypt_device *zdev; | |
537 | ||
538 | memset(reqcnt, 0, sizeof(int) * AP_DEVICES); | |
539 | spin_lock_bh(&zcrypt_device_lock); | |
540 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
541 | spin_lock(&zdev->ap_dev->lock); | |
542 | reqcnt[AP_QID_DEVICE(zdev->ap_dev->qid)] = | |
543 | zdev->ap_dev->total_request_count; | |
544 | spin_unlock(&zdev->ap_dev->lock); | |
545 | } | |
546 | spin_unlock_bh(&zcrypt_device_lock); | |
547 | } | |
548 | ||
549 | static int zcrypt_pendingq_count(void) | |
550 | { | |
551 | struct zcrypt_device *zdev; | |
552 | int pendingq_count = 0; | |
553 | ||
554 | spin_lock_bh(&zcrypt_device_lock); | |
555 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
556 | spin_lock(&zdev->ap_dev->lock); | |
557 | pendingq_count += zdev->ap_dev->pendingq_count; | |
558 | spin_unlock(&zdev->ap_dev->lock); | |
559 | } | |
560 | spin_unlock_bh(&zcrypt_device_lock); | |
561 | return pendingq_count; | |
562 | } | |
563 | ||
564 | static int zcrypt_requestq_count(void) | |
565 | { | |
566 | struct zcrypt_device *zdev; | |
567 | int requestq_count = 0; | |
568 | ||
569 | spin_lock_bh(&zcrypt_device_lock); | |
570 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
571 | spin_lock(&zdev->ap_dev->lock); | |
572 | requestq_count += zdev->ap_dev->requestq_count; | |
573 | spin_unlock(&zdev->ap_dev->lock); | |
574 | } | |
575 | spin_unlock_bh(&zcrypt_device_lock); | |
576 | return requestq_count; | |
577 | } | |
578 | ||
579 | static int zcrypt_count_type(int type) | |
580 | { | |
581 | struct zcrypt_device *zdev; | |
582 | int device_count = 0; | |
583 | ||
584 | spin_lock_bh(&zcrypt_device_lock); | |
585 | list_for_each_entry(zdev, &zcrypt_device_list, list) | |
586 | if (zdev->user_space_type == type) | |
587 | device_count++; | |
588 | spin_unlock_bh(&zcrypt_device_lock); | |
589 | return device_count; | |
590 | } | |
591 | ||
592 | /** | |
1749a81d FB |
593 | * zcrypt_ica_status(): Old, depracted combi status call. |
594 | * | |
2dbc2418 MS |
595 | * Old, deprecated combi status call. |
596 | */ | |
597 | static long zcrypt_ica_status(struct file *filp, unsigned long arg) | |
598 | { | |
599 | struct ica_z90_status *pstat; | |
600 | int ret; | |
601 | ||
602 | pstat = kzalloc(sizeof(*pstat), GFP_KERNEL); | |
603 | if (!pstat) | |
604 | return -ENOMEM; | |
605 | pstat->totalcount = zcrypt_device_count; | |
606 | pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA); | |
607 | pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC); | |
608 | pstat->requestqWaitCount = zcrypt_requestq_count(); | |
609 | pstat->pendingqWaitCount = zcrypt_pendingq_count(); | |
610 | pstat->totalOpenCount = atomic_read(&zcrypt_open_count); | |
611 | pstat->cryptoDomain = ap_domain_index; | |
612 | zcrypt_status_mask(pstat->status); | |
613 | zcrypt_qdepth_mask(pstat->qdepth); | |
614 | ret = 0; | |
615 | if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat))) | |
616 | ret = -EFAULT; | |
617 | kfree(pstat); | |
618 | return ret; | |
619 | } | |
620 | ||
621 | static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, | |
622 | unsigned long arg) | |
623 | { | |
624 | int rc; | |
625 | ||
626 | switch (cmd) { | |
627 | case ICARSAMODEXPO: { | |
628 | struct ica_rsa_modexpo __user *umex = (void __user *) arg; | |
629 | struct ica_rsa_modexpo mex; | |
630 | if (copy_from_user(&mex, umex, sizeof(mex))) | |
631 | return -EFAULT; | |
632 | do { | |
633 | rc = zcrypt_rsa_modexpo(&mex); | |
634 | } while (rc == -EAGAIN); | |
635 | if (rc) | |
636 | return rc; | |
637 | return put_user(mex.outputdatalength, &umex->outputdatalength); | |
638 | } | |
639 | case ICARSACRT: { | |
640 | struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg; | |
641 | struct ica_rsa_modexpo_crt crt; | |
642 | if (copy_from_user(&crt, ucrt, sizeof(crt))) | |
643 | return -EFAULT; | |
644 | do { | |
645 | rc = zcrypt_rsa_crt(&crt); | |
646 | } while (rc == -EAGAIN); | |
647 | if (rc) | |
648 | return rc; | |
649 | return put_user(crt.outputdatalength, &ucrt->outputdatalength); | |
650 | } | |
5432114b RW |
651 | case ZSECSENDCPRB: { |
652 | struct ica_xcRB __user *uxcRB = (void __user *) arg; | |
653 | struct ica_xcRB xcRB; | |
654 | if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB))) | |
655 | return -EFAULT; | |
656 | do { | |
657 | rc = zcrypt_send_cprb(&xcRB); | |
658 | } while (rc == -EAGAIN); | |
659 | if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB))) | |
660 | return -EFAULT; | |
661 | return rc; | |
662 | } | |
2dbc2418 MS |
663 | case Z90STAT_STATUS_MASK: { |
664 | char status[AP_DEVICES]; | |
665 | zcrypt_status_mask(status); | |
666 | if (copy_to_user((char __user *) arg, status, | |
667 | sizeof(char) * AP_DEVICES)) | |
668 | return -EFAULT; | |
669 | return 0; | |
670 | } | |
671 | case Z90STAT_QDEPTH_MASK: { | |
672 | char qdepth[AP_DEVICES]; | |
673 | zcrypt_qdepth_mask(qdepth); | |
674 | if (copy_to_user((char __user *) arg, qdepth, | |
675 | sizeof(char) * AP_DEVICES)) | |
676 | return -EFAULT; | |
677 | return 0; | |
678 | } | |
679 | case Z90STAT_PERDEV_REQCNT: { | |
680 | int reqcnt[AP_DEVICES]; | |
681 | zcrypt_perdev_reqcnt(reqcnt); | |
682 | if (copy_to_user((int __user *) arg, reqcnt, | |
683 | sizeof(int) * AP_DEVICES)) | |
684 | return -EFAULT; | |
685 | return 0; | |
686 | } | |
687 | case Z90STAT_REQUESTQ_COUNT: | |
688 | return put_user(zcrypt_requestq_count(), (int __user *) arg); | |
689 | case Z90STAT_PENDINGQ_COUNT: | |
690 | return put_user(zcrypt_pendingq_count(), (int __user *) arg); | |
691 | case Z90STAT_TOTALOPEN_COUNT: | |
692 | return put_user(atomic_read(&zcrypt_open_count), | |
693 | (int __user *) arg); | |
694 | case Z90STAT_DOMAIN_INDEX: | |
695 | return put_user(ap_domain_index, (int __user *) arg); | |
1749a81d | 696 | /* |
2dbc2418 MS |
697 | * Deprecated ioctls. Don't add another device count ioctl, |
698 | * you can count them yourself in the user space with the | |
699 | * output of the Z90STAT_STATUS_MASK ioctl. | |
700 | */ | |
701 | case ICAZ90STATUS: | |
702 | return zcrypt_ica_status(filp, arg); | |
703 | case Z90STAT_TOTALCOUNT: | |
704 | return put_user(zcrypt_device_count, (int __user *) arg); | |
705 | case Z90STAT_PCICACOUNT: | |
706 | return put_user(zcrypt_count_type(ZCRYPT_PCICA), | |
707 | (int __user *) arg); | |
708 | case Z90STAT_PCICCCOUNT: | |
709 | return put_user(zcrypt_count_type(ZCRYPT_PCICC), | |
710 | (int __user *) arg); | |
711 | case Z90STAT_PCIXCCMCL2COUNT: | |
712 | return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2), | |
713 | (int __user *) arg); | |
714 | case Z90STAT_PCIXCCMCL3COUNT: | |
715 | return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3), | |
716 | (int __user *) arg); | |
717 | case Z90STAT_PCIXCCCOUNT: | |
718 | return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) + | |
719 | zcrypt_count_type(ZCRYPT_PCIXCC_MCL3), | |
720 | (int __user *) arg); | |
721 | case Z90STAT_CEX2CCOUNT: | |
722 | return put_user(zcrypt_count_type(ZCRYPT_CEX2C), | |
723 | (int __user *) arg); | |
724 | case Z90STAT_CEX2ACOUNT: | |
725 | return put_user(zcrypt_count_type(ZCRYPT_CEX2A), | |
726 | (int __user *) arg); | |
727 | default: | |
728 | /* unknown ioctl number */ | |
729 | return -ENOIOCTLCMD; | |
730 | } | |
731 | } | |
732 | ||
733 | #ifdef CONFIG_COMPAT | |
1749a81d | 734 | /* |
2dbc2418 MS |
735 | * ioctl32 conversion routines |
736 | */ | |
737 | struct compat_ica_rsa_modexpo { | |
738 | compat_uptr_t inputdata; | |
739 | unsigned int inputdatalength; | |
740 | compat_uptr_t outputdata; | |
741 | unsigned int outputdatalength; | |
742 | compat_uptr_t b_key; | |
743 | compat_uptr_t n_modulus; | |
744 | }; | |
745 | ||
746 | static long trans_modexpo32(struct file *filp, unsigned int cmd, | |
747 | unsigned long arg) | |
748 | { | |
749 | struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg); | |
750 | struct compat_ica_rsa_modexpo mex32; | |
751 | struct ica_rsa_modexpo mex64; | |
752 | long rc; | |
753 | ||
754 | if (copy_from_user(&mex32, umex32, sizeof(mex32))) | |
755 | return -EFAULT; | |
756 | mex64.inputdata = compat_ptr(mex32.inputdata); | |
757 | mex64.inputdatalength = mex32.inputdatalength; | |
758 | mex64.outputdata = compat_ptr(mex32.outputdata); | |
759 | mex64.outputdatalength = mex32.outputdatalength; | |
760 | mex64.b_key = compat_ptr(mex32.b_key); | |
761 | mex64.n_modulus = compat_ptr(mex32.n_modulus); | |
762 | do { | |
763 | rc = zcrypt_rsa_modexpo(&mex64); | |
764 | } while (rc == -EAGAIN); | |
765 | if (!rc) | |
766 | rc = put_user(mex64.outputdatalength, | |
767 | &umex32->outputdatalength); | |
768 | return rc; | |
769 | } | |
770 | ||
771 | struct compat_ica_rsa_modexpo_crt { | |
772 | compat_uptr_t inputdata; | |
773 | unsigned int inputdatalength; | |
774 | compat_uptr_t outputdata; | |
775 | unsigned int outputdatalength; | |
776 | compat_uptr_t bp_key; | |
777 | compat_uptr_t bq_key; | |
778 | compat_uptr_t np_prime; | |
779 | compat_uptr_t nq_prime; | |
780 | compat_uptr_t u_mult_inv; | |
781 | }; | |
782 | ||
783 | static long trans_modexpo_crt32(struct file *filp, unsigned int cmd, | |
784 | unsigned long arg) | |
785 | { | |
786 | struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg); | |
787 | struct compat_ica_rsa_modexpo_crt crt32; | |
788 | struct ica_rsa_modexpo_crt crt64; | |
789 | long rc; | |
790 | ||
791 | if (copy_from_user(&crt32, ucrt32, sizeof(crt32))) | |
792 | return -EFAULT; | |
793 | crt64.inputdata = compat_ptr(crt32.inputdata); | |
794 | crt64.inputdatalength = crt32.inputdatalength; | |
795 | crt64.outputdata= compat_ptr(crt32.outputdata); | |
796 | crt64.outputdatalength = crt32.outputdatalength; | |
797 | crt64.bp_key = compat_ptr(crt32.bp_key); | |
798 | crt64.bq_key = compat_ptr(crt32.bq_key); | |
799 | crt64.np_prime = compat_ptr(crt32.np_prime); | |
800 | crt64.nq_prime = compat_ptr(crt32.nq_prime); | |
801 | crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv); | |
802 | do { | |
803 | rc = zcrypt_rsa_crt(&crt64); | |
804 | } while (rc == -EAGAIN); | |
805 | if (!rc) | |
806 | rc = put_user(crt64.outputdatalength, | |
807 | &ucrt32->outputdatalength); | |
808 | return rc; | |
809 | } | |
810 | ||
5432114b RW |
811 | struct compat_ica_xcRB { |
812 | unsigned short agent_ID; | |
813 | unsigned int user_defined; | |
814 | unsigned short request_ID; | |
815 | unsigned int request_control_blk_length; | |
816 | unsigned char padding1[16 - sizeof (compat_uptr_t)]; | |
817 | compat_uptr_t request_control_blk_addr; | |
818 | unsigned int request_data_length; | |
819 | char padding2[16 - sizeof (compat_uptr_t)]; | |
820 | compat_uptr_t request_data_address; | |
821 | unsigned int reply_control_blk_length; | |
822 | char padding3[16 - sizeof (compat_uptr_t)]; | |
823 | compat_uptr_t reply_control_blk_addr; | |
824 | unsigned int reply_data_length; | |
825 | char padding4[16 - sizeof (compat_uptr_t)]; | |
826 | compat_uptr_t reply_data_addr; | |
827 | unsigned short priority_window; | |
828 | unsigned int status; | |
829 | } __attribute__((packed)); | |
830 | ||
831 | static long trans_xcRB32(struct file *filp, unsigned int cmd, | |
832 | unsigned long arg) | |
833 | { | |
834 | struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg); | |
835 | struct compat_ica_xcRB xcRB32; | |
836 | struct ica_xcRB xcRB64; | |
837 | long rc; | |
838 | ||
839 | if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32))) | |
840 | return -EFAULT; | |
841 | xcRB64.agent_ID = xcRB32.agent_ID; | |
842 | xcRB64.user_defined = xcRB32.user_defined; | |
843 | xcRB64.request_ID = xcRB32.request_ID; | |
844 | xcRB64.request_control_blk_length = | |
845 | xcRB32.request_control_blk_length; | |
846 | xcRB64.request_control_blk_addr = | |
847 | compat_ptr(xcRB32.request_control_blk_addr); | |
848 | xcRB64.request_data_length = | |
849 | xcRB32.request_data_length; | |
850 | xcRB64.request_data_address = | |
851 | compat_ptr(xcRB32.request_data_address); | |
852 | xcRB64.reply_control_blk_length = | |
853 | xcRB32.reply_control_blk_length; | |
854 | xcRB64.reply_control_blk_addr = | |
855 | compat_ptr(xcRB32.reply_control_blk_addr); | |
856 | xcRB64.reply_data_length = xcRB32.reply_data_length; | |
857 | xcRB64.reply_data_addr = | |
858 | compat_ptr(xcRB32.reply_data_addr); | |
859 | xcRB64.priority_window = xcRB32.priority_window; | |
860 | xcRB64.status = xcRB32.status; | |
861 | do { | |
862 | rc = zcrypt_send_cprb(&xcRB64); | |
863 | } while (rc == -EAGAIN); | |
864 | xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length; | |
865 | xcRB32.reply_data_length = xcRB64.reply_data_length; | |
866 | xcRB32.status = xcRB64.status; | |
867 | if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32))) | |
868 | return -EFAULT; | |
869 | return rc; | |
870 | } | |
871 | ||
2b67fc46 | 872 | static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd, |
2dbc2418 MS |
873 | unsigned long arg) |
874 | { | |
875 | if (cmd == ICARSAMODEXPO) | |
876 | return trans_modexpo32(filp, cmd, arg); | |
877 | if (cmd == ICARSACRT) | |
878 | return trans_modexpo_crt32(filp, cmd, arg); | |
5432114b RW |
879 | if (cmd == ZSECSENDCPRB) |
880 | return trans_xcRB32(filp, cmd, arg); | |
2dbc2418 MS |
881 | return zcrypt_unlocked_ioctl(filp, cmd, arg); |
882 | } | |
883 | #endif | |
884 | ||
1749a81d | 885 | /* |
2dbc2418 MS |
886 | * Misc device file operations. |
887 | */ | |
d54b1fdb | 888 | static const struct file_operations zcrypt_fops = { |
2dbc2418 MS |
889 | .owner = THIS_MODULE, |
890 | .read = zcrypt_read, | |
891 | .write = zcrypt_write, | |
892 | .unlocked_ioctl = zcrypt_unlocked_ioctl, | |
893 | #ifdef CONFIG_COMPAT | |
894 | .compat_ioctl = zcrypt_compat_ioctl, | |
895 | #endif | |
896 | .open = zcrypt_open, | |
897 | .release = zcrypt_release | |
898 | }; | |
899 | ||
1749a81d | 900 | /* |
2dbc2418 MS |
901 | * Misc device. |
902 | */ | |
903 | static struct miscdevice zcrypt_misc_device = { | |
904 | .minor = MISC_DYNAMIC_MINOR, | |
905 | .name = "z90crypt", | |
906 | .fops = &zcrypt_fops, | |
907 | }; | |
908 | ||
1749a81d | 909 | /* |
2dbc2418 MS |
910 | * Deprecated /proc entry support. |
911 | */ | |
912 | static struct proc_dir_entry *zcrypt_entry; | |
913 | ||
4d284cac HC |
914 | static int sprintcl(unsigned char *outaddr, unsigned char *addr, |
915 | unsigned int len) | |
2dbc2418 MS |
916 | { |
917 | int hl, i; | |
918 | ||
919 | hl = 0; | |
920 | for (i = 0; i < len; i++) | |
921 | hl += sprintf(outaddr+hl, "%01x", (unsigned int) addr[i]); | |
922 | hl += sprintf(outaddr+hl, " "); | |
923 | return hl; | |
924 | } | |
925 | ||
4d284cac HC |
926 | static int sprintrw(unsigned char *outaddr, unsigned char *addr, |
927 | unsigned int len) | |
2dbc2418 MS |
928 | { |
929 | int hl, inl, c, cx; | |
930 | ||
931 | hl = sprintf(outaddr, " "); | |
932 | inl = 0; | |
933 | for (c = 0; c < (len / 16); c++) { | |
934 | hl += sprintcl(outaddr+hl, addr+inl, 16); | |
935 | inl += 16; | |
936 | } | |
937 | cx = len%16; | |
938 | if (cx) { | |
939 | hl += sprintcl(outaddr+hl, addr+inl, cx); | |
940 | inl += cx; | |
941 | } | |
942 | hl += sprintf(outaddr+hl, "\n"); | |
943 | return hl; | |
944 | } | |
945 | ||
4d284cac HC |
946 | static int sprinthx(unsigned char *title, unsigned char *outaddr, |
947 | unsigned char *addr, unsigned int len) | |
2dbc2418 MS |
948 | { |
949 | int hl, inl, r, rx; | |
950 | ||
951 | hl = sprintf(outaddr, "\n%s\n", title); | |
952 | inl = 0; | |
953 | for (r = 0; r < (len / 64); r++) { | |
954 | hl += sprintrw(outaddr+hl, addr+inl, 64); | |
955 | inl += 64; | |
956 | } | |
957 | rx = len % 64; | |
958 | if (rx) { | |
959 | hl += sprintrw(outaddr+hl, addr+inl, rx); | |
960 | inl += rx; | |
961 | } | |
962 | hl += sprintf(outaddr+hl, "\n"); | |
963 | return hl; | |
964 | } | |
965 | ||
4d284cac HC |
966 | static int sprinthx4(unsigned char *title, unsigned char *outaddr, |
967 | unsigned int *array, unsigned int len) | |
2dbc2418 MS |
968 | { |
969 | int hl, r; | |
970 | ||
971 | hl = sprintf(outaddr, "\n%s\n", title); | |
972 | for (r = 0; r < len; r++) { | |
973 | if ((r % 8) == 0) | |
974 | hl += sprintf(outaddr+hl, " "); | |
975 | hl += sprintf(outaddr+hl, "%08X ", array[r]); | |
976 | if ((r % 8) == 7) | |
977 | hl += sprintf(outaddr+hl, "\n"); | |
978 | } | |
979 | hl += sprintf(outaddr+hl, "\n"); | |
980 | return hl; | |
981 | } | |
982 | ||
983 | static int zcrypt_status_read(char *resp_buff, char **start, off_t offset, | |
984 | int count, int *eof, void *data) | |
985 | { | |
986 | unsigned char *workarea; | |
987 | int len; | |
988 | ||
989 | len = 0; | |
990 | ||
991 | /* resp_buff is a page. Use the right half for a work area */ | |
992 | workarea = resp_buff + 2000; | |
993 | len += sprintf(resp_buff + len, "\nzcrypt version: %d.%d.%d\n", | |
994 | ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT); | |
995 | len += sprintf(resp_buff + len, "Cryptographic domain: %d\n", | |
996 | ap_domain_index); | |
997 | len += sprintf(resp_buff + len, "Total device count: %d\n", | |
998 | zcrypt_device_count); | |
999 | len += sprintf(resp_buff + len, "PCICA count: %d\n", | |
1000 | zcrypt_count_type(ZCRYPT_PCICA)); | |
1001 | len += sprintf(resp_buff + len, "PCICC count: %d\n", | |
1002 | zcrypt_count_type(ZCRYPT_PCICC)); | |
1003 | len += sprintf(resp_buff + len, "PCIXCC MCL2 count: %d\n", | |
1004 | zcrypt_count_type(ZCRYPT_PCIXCC_MCL2)); | |
1005 | len += sprintf(resp_buff + len, "PCIXCC MCL3 count: %d\n", | |
1006 | zcrypt_count_type(ZCRYPT_PCIXCC_MCL3)); | |
1007 | len += sprintf(resp_buff + len, "CEX2C count: %d\n", | |
1008 | zcrypt_count_type(ZCRYPT_CEX2C)); | |
1009 | len += sprintf(resp_buff + len, "CEX2A count: %d\n", | |
1010 | zcrypt_count_type(ZCRYPT_CEX2A)); | |
1011 | len += sprintf(resp_buff + len, "requestq count: %d\n", | |
1012 | zcrypt_requestq_count()); | |
1013 | len += sprintf(resp_buff + len, "pendingq count: %d\n", | |
1014 | zcrypt_pendingq_count()); | |
1015 | len += sprintf(resp_buff + len, "Total open handles: %d\n\n", | |
1016 | atomic_read(&zcrypt_open_count)); | |
1017 | zcrypt_status_mask(workarea); | |
1018 | len += sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) " | |
1019 | "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A", | |
1020 | resp_buff+len, workarea, AP_DEVICES); | |
1021 | zcrypt_qdepth_mask(workarea); | |
1022 | len += sprinthx("Waiting work element counts", | |
1023 | resp_buff+len, workarea, AP_DEVICES); | |
2b67fc46 | 1024 | zcrypt_perdev_reqcnt((int *) workarea); |
2dbc2418 MS |
1025 | len += sprinthx4("Per-device successfully completed request counts", |
1026 | resp_buff+len,(unsigned int *) workarea, AP_DEVICES); | |
1027 | *eof = 1; | |
1028 | memset((void *) workarea, 0x00, AP_DEVICES * sizeof(unsigned int)); | |
1029 | return len; | |
1030 | } | |
1031 | ||
1032 | static void zcrypt_disable_card(int index) | |
1033 | { | |
1034 | struct zcrypt_device *zdev; | |
1035 | ||
1036 | spin_lock_bh(&zcrypt_device_lock); | |
1037 | list_for_each_entry(zdev, &zcrypt_device_list, list) | |
1038 | if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) { | |
1039 | zdev->online = 0; | |
1040 | ap_flush_queue(zdev->ap_dev); | |
1041 | break; | |
1042 | } | |
1043 | spin_unlock_bh(&zcrypt_device_lock); | |
1044 | } | |
1045 | ||
1046 | static void zcrypt_enable_card(int index) | |
1047 | { | |
1048 | struct zcrypt_device *zdev; | |
1049 | ||
1050 | spin_lock_bh(&zcrypt_device_lock); | |
1051 | list_for_each_entry(zdev, &zcrypt_device_list, list) | |
1052 | if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) { | |
1053 | zdev->online = 1; | |
1054 | break; | |
1055 | } | |
1056 | spin_unlock_bh(&zcrypt_device_lock); | |
1057 | } | |
1058 | ||
1059 | static int zcrypt_status_write(struct file *file, const char __user *buffer, | |
1060 | unsigned long count, void *data) | |
1061 | { | |
1062 | unsigned char *lbuf, *ptr; | |
1063 | unsigned long local_count; | |
1064 | int j; | |
1065 | ||
1066 | if (count <= 0) | |
1067 | return 0; | |
1068 | ||
1069 | #define LBUFSIZE 1200UL | |
1070 | lbuf = kmalloc(LBUFSIZE, GFP_KERNEL); | |
1071 | if (!lbuf) { | |
1072 | PRINTK("kmalloc failed!\n"); | |
1073 | return 0; | |
1074 | } | |
1075 | ||
1076 | local_count = min(LBUFSIZE - 1, count); | |
1077 | if (copy_from_user(lbuf, buffer, local_count) != 0) { | |
1078 | kfree(lbuf); | |
1079 | return -EFAULT; | |
1080 | } | |
1081 | lbuf[local_count] = '\0'; | |
1082 | ||
1083 | ptr = strstr(lbuf, "Online devices"); | |
1084 | if (!ptr) { | |
1085 | PRINTK("Unable to parse data (missing \"Online devices\")\n"); | |
1086 | goto out; | |
1087 | } | |
1088 | ptr = strstr(ptr, "\n"); | |
1089 | if (!ptr) { | |
1090 | PRINTK("Unable to parse data (missing newline " | |
1091 | "after \"Online devices\")\n"); | |
1092 | goto out; | |
1093 | } | |
1094 | ptr++; | |
1095 | ||
1096 | if (strstr(ptr, "Waiting work element counts") == NULL) { | |
1097 | PRINTK("Unable to parse data (missing " | |
1098 | "\"Waiting work element counts\")\n"); | |
1099 | goto out; | |
1100 | } | |
1101 | ||
1102 | for (j = 0; j < 64 && *ptr; ptr++) { | |
1749a81d | 1103 | /* |
2dbc2418 MS |
1104 | * '0' for no device, '1' for PCICA, '2' for PCICC, |
1105 | * '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3, | |
1106 | * '5' for CEX2C and '6' for CEX2A' | |
1107 | */ | |
1108 | if (*ptr >= '0' && *ptr <= '6') | |
1109 | j++; | |
1110 | else if (*ptr == 'd' || *ptr == 'D') | |
1111 | zcrypt_disable_card(j++); | |
1112 | else if (*ptr == 'e' || *ptr == 'E') | |
1113 | zcrypt_enable_card(j++); | |
1114 | else if (*ptr != ' ' && *ptr != '\t') | |
1115 | break; | |
1116 | } | |
1117 | out: | |
1118 | kfree(lbuf); | |
1119 | return count; | |
1120 | } | |
1121 | ||
2f7c8bd6 RW |
1122 | static int zcrypt_rng_device_count; |
1123 | static u32 *zcrypt_rng_buffer; | |
1124 | static int zcrypt_rng_buffer_index; | |
1125 | static DEFINE_MUTEX(zcrypt_rng_mutex); | |
1126 | ||
1127 | static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data) | |
1128 | { | |
1129 | int rc; | |
1130 | ||
1749a81d | 1131 | /* |
2f7c8bd6 RW |
1132 | * We don't need locking here because the RNG API guarantees serialized |
1133 | * read method calls. | |
1134 | */ | |
1135 | if (zcrypt_rng_buffer_index == 0) { | |
1136 | rc = zcrypt_rng((char *) zcrypt_rng_buffer); | |
1137 | if (rc < 0) | |
1138 | return -EIO; | |
1139 | zcrypt_rng_buffer_index = rc / sizeof *data; | |
1140 | } | |
1141 | *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index]; | |
1142 | return sizeof *data; | |
1143 | } | |
1144 | ||
1145 | static struct hwrng zcrypt_rng_dev = { | |
1146 | .name = "zcrypt", | |
1147 | .data_read = zcrypt_rng_data_read, | |
1148 | }; | |
1149 | ||
1150 | static int zcrypt_rng_device_add(void) | |
1151 | { | |
1152 | int rc = 0; | |
1153 | ||
1154 | mutex_lock(&zcrypt_rng_mutex); | |
1155 | if (zcrypt_rng_device_count == 0) { | |
1156 | zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL); | |
1157 | if (!zcrypt_rng_buffer) { | |
1158 | rc = -ENOMEM; | |
1159 | goto out; | |
1160 | } | |
1161 | zcrypt_rng_buffer_index = 0; | |
1162 | rc = hwrng_register(&zcrypt_rng_dev); | |
1163 | if (rc) | |
1164 | goto out_free; | |
1165 | zcrypt_rng_device_count = 1; | |
1166 | } else | |
1167 | zcrypt_rng_device_count++; | |
1168 | mutex_unlock(&zcrypt_rng_mutex); | |
1169 | return 0; | |
1170 | ||
1171 | out_free: | |
1172 | free_page((unsigned long) zcrypt_rng_buffer); | |
1173 | out: | |
1174 | mutex_unlock(&zcrypt_rng_mutex); | |
1175 | return rc; | |
1176 | } | |
1177 | ||
1178 | static void zcrypt_rng_device_remove(void) | |
1179 | { | |
1180 | mutex_lock(&zcrypt_rng_mutex); | |
1181 | zcrypt_rng_device_count--; | |
1182 | if (zcrypt_rng_device_count == 0) { | |
1183 | hwrng_unregister(&zcrypt_rng_dev); | |
1184 | free_page((unsigned long) zcrypt_rng_buffer); | |
1185 | } | |
1186 | mutex_unlock(&zcrypt_rng_mutex); | |
1187 | } | |
1188 | ||
2dbc2418 | 1189 | /** |
1749a81d FB |
1190 | * zcrypt_api_init(): Module initialization. |
1191 | * | |
2dbc2418 MS |
1192 | * The module initialization code. |
1193 | */ | |
1194 | int __init zcrypt_api_init(void) | |
1195 | { | |
1196 | int rc; | |
1197 | ||
1198 | /* Register the request sprayer. */ | |
1199 | rc = misc_register(&zcrypt_misc_device); | |
1200 | if (rc < 0) { | |
1201 | PRINTKW(KERN_ERR "misc_register (minor %d) failed with %d\n", | |
1202 | zcrypt_misc_device.minor, rc); | |
1203 | goto out; | |
1204 | } | |
1205 | ||
1206 | /* Set up the proc file system */ | |
1207 | zcrypt_entry = create_proc_entry("driver/z90crypt", 0644, NULL); | |
1208 | if (!zcrypt_entry) { | |
1209 | PRINTK("Couldn't create z90crypt proc entry\n"); | |
1210 | rc = -ENOMEM; | |
1211 | goto out_misc; | |
1212 | } | |
2dbc2418 MS |
1213 | zcrypt_entry->data = NULL; |
1214 | zcrypt_entry->read_proc = zcrypt_status_read; | |
1215 | zcrypt_entry->write_proc = zcrypt_status_write; | |
1216 | ||
1217 | return 0; | |
1218 | ||
1219 | out_misc: | |
1220 | misc_deregister(&zcrypt_misc_device); | |
1221 | out: | |
1222 | return rc; | |
1223 | } | |
1224 | ||
1225 | /** | |
1749a81d FB |
1226 | * zcrypt_api_exit(): Module termination. |
1227 | * | |
2dbc2418 MS |
1228 | * The module termination code. |
1229 | */ | |
1230 | void zcrypt_api_exit(void) | |
1231 | { | |
1232 | remove_proc_entry("driver/z90crypt", NULL); | |
1233 | misc_deregister(&zcrypt_misc_device); | |
1234 | } | |
1235 | ||
1236 | #ifndef CONFIG_ZCRYPT_MONOLITHIC | |
1237 | module_init(zcrypt_api_init); | |
1238 | module_exit(zcrypt_api_exit); | |
1239 | #endif |