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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> | |
e73322ce | 37 | #include <linux/smp_lock.h> |
2dbc2418 MS |
38 | #include <asm/atomic.h> |
39 | #include <asm/uaccess.h> | |
2f7c8bd6 | 40 | #include <linux/hw_random.h> |
2dbc2418 MS |
41 | |
42 | #include "zcrypt_api.h" | |
43 | ||
1749a81d | 44 | /* |
2dbc2418 MS |
45 | * Module description. |
46 | */ | |
47 | MODULE_AUTHOR("IBM Corporation"); | |
48 | MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " | |
49 | "Copyright 2001, 2006 IBM Corporation"); | |
50 | MODULE_LICENSE("GPL"); | |
51 | ||
52 | static DEFINE_SPINLOCK(zcrypt_device_lock); | |
53 | static LIST_HEAD(zcrypt_device_list); | |
54 | static int zcrypt_device_count = 0; | |
55 | static atomic_t zcrypt_open_count = ATOMIC_INIT(0); | |
56 | ||
2f7c8bd6 RW |
57 | static int zcrypt_rng_device_add(void); |
58 | static void zcrypt_rng_device_remove(void); | |
59 | ||
1749a81d | 60 | /* |
2dbc2418 MS |
61 | * Device attributes common for all crypto devices. |
62 | */ | |
63 | static ssize_t zcrypt_type_show(struct device *dev, | |
64 | struct device_attribute *attr, char *buf) | |
65 | { | |
66 | struct zcrypt_device *zdev = to_ap_dev(dev)->private; | |
67 | return snprintf(buf, PAGE_SIZE, "%s\n", zdev->type_string); | |
68 | } | |
69 | ||
70 | static DEVICE_ATTR(type, 0444, zcrypt_type_show, NULL); | |
71 | ||
72 | static ssize_t zcrypt_online_show(struct device *dev, | |
73 | struct device_attribute *attr, char *buf) | |
74 | { | |
75 | struct zcrypt_device *zdev = to_ap_dev(dev)->private; | |
76 | return snprintf(buf, PAGE_SIZE, "%d\n", zdev->online); | |
77 | } | |
78 | ||
79 | static ssize_t zcrypt_online_store(struct device *dev, | |
80 | struct device_attribute *attr, | |
81 | const char *buf, size_t count) | |
82 | { | |
83 | struct zcrypt_device *zdev = to_ap_dev(dev)->private; | |
84 | int online; | |
85 | ||
86 | if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1) | |
87 | return -EINVAL; | |
88 | zdev->online = online; | |
89 | if (!online) | |
90 | ap_flush_queue(zdev->ap_dev); | |
91 | return count; | |
92 | } | |
93 | ||
94 | static DEVICE_ATTR(online, 0644, zcrypt_online_show, zcrypt_online_store); | |
95 | ||
96 | static struct attribute * zcrypt_device_attrs[] = { | |
97 | &dev_attr_type.attr, | |
98 | &dev_attr_online.attr, | |
99 | NULL, | |
100 | }; | |
101 | ||
102 | static struct attribute_group zcrypt_device_attr_group = { | |
103 | .attrs = zcrypt_device_attrs, | |
104 | }; | |
105 | ||
106 | /** | |
1749a81d FB |
107 | * __zcrypt_increase_preference(): Increase preference of a crypto device. |
108 | * @zdev: Pointer the crypto device | |
109 | * | |
2dbc2418 MS |
110 | * Move the device towards the head of the device list. |
111 | * Need to be called while holding the zcrypt device list lock. | |
112 | * Note: cards with speed_rating of 0 are kept at the end of the list. | |
113 | */ | |
114 | static void __zcrypt_increase_preference(struct zcrypt_device *zdev) | |
115 | { | |
116 | struct zcrypt_device *tmp; | |
117 | struct list_head *l; | |
118 | ||
119 | if (zdev->speed_rating == 0) | |
120 | return; | |
121 | for (l = zdev->list.prev; l != &zcrypt_device_list; l = l->prev) { | |
122 | tmp = list_entry(l, struct zcrypt_device, list); | |
123 | if ((tmp->request_count + 1) * tmp->speed_rating <= | |
124 | (zdev->request_count + 1) * zdev->speed_rating && | |
125 | tmp->speed_rating != 0) | |
126 | break; | |
127 | } | |
128 | if (l == zdev->list.prev) | |
129 | return; | |
130 | /* Move zdev behind l */ | |
131 | list_del(&zdev->list); | |
132 | list_add(&zdev->list, l); | |
133 | } | |
134 | ||
135 | /** | |
1749a81d FB |
136 | * __zcrypt_decrease_preference(): Decrease preference of a crypto device. |
137 | * @zdev: Pointer to a crypto device. | |
138 | * | |
2dbc2418 MS |
139 | * Move the device towards the tail of the device list. |
140 | * Need to be called while holding the zcrypt device list lock. | |
141 | * Note: cards with speed_rating of 0 are kept at the end of the list. | |
142 | */ | |
143 | static void __zcrypt_decrease_preference(struct zcrypt_device *zdev) | |
144 | { | |
145 | struct zcrypt_device *tmp; | |
146 | struct list_head *l; | |
147 | ||
148 | if (zdev->speed_rating == 0) | |
149 | return; | |
150 | for (l = zdev->list.next; l != &zcrypt_device_list; l = l->next) { | |
151 | tmp = list_entry(l, struct zcrypt_device, list); | |
152 | if ((tmp->request_count + 1) * tmp->speed_rating > | |
153 | (zdev->request_count + 1) * zdev->speed_rating || | |
154 | tmp->speed_rating == 0) | |
155 | break; | |
156 | } | |
157 | if (l == zdev->list.next) | |
158 | return; | |
159 | /* Move zdev before l */ | |
160 | list_del(&zdev->list); | |
161 | list_add_tail(&zdev->list, l); | |
162 | } | |
163 | ||
164 | static void zcrypt_device_release(struct kref *kref) | |
165 | { | |
166 | struct zcrypt_device *zdev = | |
167 | container_of(kref, struct zcrypt_device, refcount); | |
168 | zcrypt_device_free(zdev); | |
169 | } | |
170 | ||
171 | void zcrypt_device_get(struct zcrypt_device *zdev) | |
172 | { | |
173 | kref_get(&zdev->refcount); | |
174 | } | |
175 | EXPORT_SYMBOL(zcrypt_device_get); | |
176 | ||
177 | int zcrypt_device_put(struct zcrypt_device *zdev) | |
178 | { | |
179 | return kref_put(&zdev->refcount, zcrypt_device_release); | |
180 | } | |
181 | EXPORT_SYMBOL(zcrypt_device_put); | |
182 | ||
183 | struct zcrypt_device *zcrypt_device_alloc(size_t max_response_size) | |
184 | { | |
185 | struct zcrypt_device *zdev; | |
186 | ||
187 | zdev = kzalloc(sizeof(struct zcrypt_device), GFP_KERNEL); | |
188 | if (!zdev) | |
189 | return NULL; | |
190 | zdev->reply.message = kmalloc(max_response_size, GFP_KERNEL); | |
191 | if (!zdev->reply.message) | |
192 | goto out_free; | |
193 | zdev->reply.length = max_response_size; | |
194 | spin_lock_init(&zdev->lock); | |
195 | INIT_LIST_HEAD(&zdev->list); | |
196 | return zdev; | |
197 | ||
198 | out_free: | |
199 | kfree(zdev); | |
200 | return NULL; | |
201 | } | |
202 | EXPORT_SYMBOL(zcrypt_device_alloc); | |
203 | ||
204 | void zcrypt_device_free(struct zcrypt_device *zdev) | |
205 | { | |
206 | kfree(zdev->reply.message); | |
207 | kfree(zdev); | |
208 | } | |
209 | EXPORT_SYMBOL(zcrypt_device_free); | |
210 | ||
211 | /** | |
1749a81d FB |
212 | * zcrypt_device_register() - Register a crypto device. |
213 | * @zdev: Pointer to a crypto device | |
214 | * | |
215 | * Register a crypto device. Returns 0 if successful. | |
2dbc2418 MS |
216 | */ |
217 | int zcrypt_device_register(struct zcrypt_device *zdev) | |
218 | { | |
219 | int rc; | |
220 | ||
221 | rc = sysfs_create_group(&zdev->ap_dev->device.kobj, | |
222 | &zcrypt_device_attr_group); | |
223 | if (rc) | |
224 | goto out; | |
225 | get_device(&zdev->ap_dev->device); | |
226 | kref_init(&zdev->refcount); | |
227 | spin_lock_bh(&zcrypt_device_lock); | |
228 | zdev->online = 1; /* New devices are online by default. */ | |
229 | list_add_tail(&zdev->list, &zcrypt_device_list); | |
230 | __zcrypt_increase_preference(zdev); | |
231 | zcrypt_device_count++; | |
232 | spin_unlock_bh(&zcrypt_device_lock); | |
2f7c8bd6 RW |
233 | if (zdev->ops->rng) { |
234 | rc = zcrypt_rng_device_add(); | |
235 | if (rc) | |
236 | goto out_unregister; | |
237 | } | |
238 | return 0; | |
239 | ||
240 | out_unregister: | |
241 | spin_lock_bh(&zcrypt_device_lock); | |
242 | zcrypt_device_count--; | |
243 | list_del_init(&zdev->list); | |
244 | spin_unlock_bh(&zcrypt_device_lock); | |
245 | sysfs_remove_group(&zdev->ap_dev->device.kobj, | |
246 | &zcrypt_device_attr_group); | |
247 | put_device(&zdev->ap_dev->device); | |
248 | zcrypt_device_put(zdev); | |
2dbc2418 MS |
249 | out: |
250 | return rc; | |
251 | } | |
252 | EXPORT_SYMBOL(zcrypt_device_register); | |
253 | ||
254 | /** | |
1749a81d FB |
255 | * zcrypt_device_unregister(): Unregister a crypto device. |
256 | * @zdev: Pointer to crypto device | |
257 | * | |
2dbc2418 MS |
258 | * Unregister a crypto device. |
259 | */ | |
260 | void zcrypt_device_unregister(struct zcrypt_device *zdev) | |
261 | { | |
2f7c8bd6 RW |
262 | if (zdev->ops->rng) |
263 | zcrypt_rng_device_remove(); | |
2dbc2418 MS |
264 | spin_lock_bh(&zcrypt_device_lock); |
265 | zcrypt_device_count--; | |
266 | list_del_init(&zdev->list); | |
267 | spin_unlock_bh(&zcrypt_device_lock); | |
268 | sysfs_remove_group(&zdev->ap_dev->device.kobj, | |
269 | &zcrypt_device_attr_group); | |
270 | put_device(&zdev->ap_dev->device); | |
271 | zcrypt_device_put(zdev); | |
272 | } | |
273 | EXPORT_SYMBOL(zcrypt_device_unregister); | |
274 | ||
275 | /** | |
1749a81d FB |
276 | * zcrypt_read (): Not supported beyond zcrypt 1.3.1. |
277 | * | |
278 | * This function is not supported beyond zcrypt 1.3.1. | |
2dbc2418 MS |
279 | */ |
280 | static ssize_t zcrypt_read(struct file *filp, char __user *buf, | |
281 | size_t count, loff_t *f_pos) | |
282 | { | |
283 | return -EPERM; | |
284 | } | |
285 | ||
286 | /** | |
1749a81d FB |
287 | * zcrypt_write(): Not allowed. |
288 | * | |
2dbc2418 MS |
289 | * Write is is not allowed |
290 | */ | |
291 | static ssize_t zcrypt_write(struct file *filp, const char __user *buf, | |
292 | size_t count, loff_t *f_pos) | |
293 | { | |
294 | return -EPERM; | |
295 | } | |
296 | ||
297 | /** | |
1749a81d FB |
298 | * zcrypt_open(): Count number of users. |
299 | * | |
300 | * Device open function to count number of users. | |
2dbc2418 MS |
301 | */ |
302 | static int zcrypt_open(struct inode *inode, struct file *filp) | |
303 | { | |
e73322ce | 304 | lock_kernel(); |
2dbc2418 | 305 | atomic_inc(&zcrypt_open_count); |
e73322ce | 306 | unlock_kernel(); |
2dbc2418 MS |
307 | return 0; |
308 | } | |
309 | ||
1749a81d FB |
310 | /** |
311 | * zcrypt_release(): Count number of users. | |
312 | * | |
313 | * Device close function to count number of users. | |
314 | */ | |
2dbc2418 MS |
315 | static int zcrypt_release(struct inode *inode, struct file *filp) |
316 | { | |
317 | atomic_dec(&zcrypt_open_count); | |
318 | return 0; | |
319 | } | |
320 | ||
1749a81d | 321 | /* |
2dbc2418 MS |
322 | * zcrypt ioctls. |
323 | */ | |
324 | static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex) | |
325 | { | |
326 | struct zcrypt_device *zdev; | |
327 | int rc; | |
328 | ||
329 | if (mex->outputdatalength < mex->inputdatalength) | |
330 | return -EINVAL; | |
1749a81d | 331 | /* |
2dbc2418 MS |
332 | * As long as outputdatalength is big enough, we can set the |
333 | * outputdatalength equal to the inputdatalength, since that is the | |
334 | * number of bytes we will copy in any case | |
335 | */ | |
336 | mex->outputdatalength = mex->inputdatalength; | |
337 | ||
338 | spin_lock_bh(&zcrypt_device_lock); | |
339 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
340 | if (!zdev->online || | |
341 | !zdev->ops->rsa_modexpo || | |
342 | zdev->min_mod_size > mex->inputdatalength || | |
343 | zdev->max_mod_size < mex->inputdatalength) | |
344 | continue; | |
345 | zcrypt_device_get(zdev); | |
346 | get_device(&zdev->ap_dev->device); | |
347 | zdev->request_count++; | |
348 | __zcrypt_decrease_preference(zdev); | |
2dbc2418 | 349 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
43a867a2 | 350 | spin_unlock_bh(&zcrypt_device_lock); |
2dbc2418 | 351 | rc = zdev->ops->rsa_modexpo(zdev, mex); |
43a867a2 | 352 | spin_lock_bh(&zcrypt_device_lock); |
2dbc2418 MS |
353 | module_put(zdev->ap_dev->drv->driver.owner); |
354 | } | |
355 | else | |
356 | rc = -EAGAIN; | |
2dbc2418 MS |
357 | zdev->request_count--; |
358 | __zcrypt_increase_preference(zdev); | |
359 | put_device(&zdev->ap_dev->device); | |
360 | zcrypt_device_put(zdev); | |
361 | spin_unlock_bh(&zcrypt_device_lock); | |
362 | return rc; | |
363 | } | |
364 | spin_unlock_bh(&zcrypt_device_lock); | |
365 | return -ENODEV; | |
366 | } | |
367 | ||
368 | static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt) | |
369 | { | |
370 | struct zcrypt_device *zdev; | |
371 | unsigned long long z1, z2, z3; | |
372 | int rc, copied; | |
373 | ||
374 | if (crt->outputdatalength < crt->inputdatalength || | |
375 | (crt->inputdatalength & 1)) | |
376 | return -EINVAL; | |
1749a81d | 377 | /* |
2dbc2418 MS |
378 | * As long as outputdatalength is big enough, we can set the |
379 | * outputdatalength equal to the inputdatalength, since that is the | |
380 | * number of bytes we will copy in any case | |
381 | */ | |
382 | crt->outputdatalength = crt->inputdatalength; | |
383 | ||
384 | copied = 0; | |
385 | restart: | |
386 | spin_lock_bh(&zcrypt_device_lock); | |
387 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
388 | if (!zdev->online || | |
389 | !zdev->ops->rsa_modexpo_crt || | |
390 | zdev->min_mod_size > crt->inputdatalength || | |
391 | zdev->max_mod_size < crt->inputdatalength) | |
392 | continue; | |
393 | if (zdev->short_crt && crt->inputdatalength > 240) { | |
1749a81d | 394 | /* |
2dbc2418 MS |
395 | * Check inputdata for leading zeros for cards |
396 | * that can't handle np_prime, bp_key, or | |
397 | * u_mult_inv > 128 bytes. | |
398 | */ | |
399 | if (copied == 0) { | |
400 | int len; | |
401 | spin_unlock_bh(&zcrypt_device_lock); | |
402 | /* len is max 256 / 2 - 120 = 8 */ | |
403 | len = crt->inputdatalength / 2 - 120; | |
404 | z1 = z2 = z3 = 0; | |
405 | if (copy_from_user(&z1, crt->np_prime, len) || | |
406 | copy_from_user(&z2, crt->bp_key, len) || | |
407 | copy_from_user(&z3, crt->u_mult_inv, len)) | |
408 | return -EFAULT; | |
409 | copied = 1; | |
1749a81d | 410 | /* |
2dbc2418 MS |
411 | * We have to restart device lookup - |
412 | * the device list may have changed by now. | |
413 | */ | |
414 | goto restart; | |
415 | } | |
416 | if (z1 != 0ULL || z2 != 0ULL || z3 != 0ULL) | |
417 | /* The device can't handle this request. */ | |
418 | continue; | |
419 | } | |
420 | zcrypt_device_get(zdev); | |
421 | get_device(&zdev->ap_dev->device); | |
422 | zdev->request_count++; | |
423 | __zcrypt_decrease_preference(zdev); | |
2dbc2418 | 424 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
43a867a2 | 425 | spin_unlock_bh(&zcrypt_device_lock); |
2dbc2418 | 426 | rc = zdev->ops->rsa_modexpo_crt(zdev, crt); |
43a867a2 | 427 | spin_lock_bh(&zcrypt_device_lock); |
2dbc2418 MS |
428 | module_put(zdev->ap_dev->drv->driver.owner); |
429 | } | |
430 | else | |
431 | rc = -EAGAIN; | |
2dbc2418 MS |
432 | zdev->request_count--; |
433 | __zcrypt_increase_preference(zdev); | |
434 | put_device(&zdev->ap_dev->device); | |
435 | zcrypt_device_put(zdev); | |
436 | spin_unlock_bh(&zcrypt_device_lock); | |
437 | return rc; | |
438 | } | |
439 | spin_unlock_bh(&zcrypt_device_lock); | |
440 | return -ENODEV; | |
441 | } | |
442 | ||
5432114b RW |
443 | static long zcrypt_send_cprb(struct ica_xcRB *xcRB) |
444 | { | |
445 | struct zcrypt_device *zdev; | |
446 | int rc; | |
447 | ||
448 | spin_lock_bh(&zcrypt_device_lock); | |
449 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
450 | if (!zdev->online || !zdev->ops->send_cprb || | |
451 | (xcRB->user_defined != AUTOSELECT && | |
452 | AP_QID_DEVICE(zdev->ap_dev->qid) != xcRB->user_defined) | |
453 | ) | |
454 | continue; | |
455 | zcrypt_device_get(zdev); | |
456 | get_device(&zdev->ap_dev->device); | |
457 | zdev->request_count++; | |
458 | __zcrypt_decrease_preference(zdev); | |
5432114b | 459 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
43a867a2 | 460 | spin_unlock_bh(&zcrypt_device_lock); |
5432114b | 461 | rc = zdev->ops->send_cprb(zdev, xcRB); |
43a867a2 | 462 | spin_lock_bh(&zcrypt_device_lock); |
5432114b RW |
463 | module_put(zdev->ap_dev->drv->driver.owner); |
464 | } | |
465 | else | |
466 | rc = -EAGAIN; | |
5432114b RW |
467 | zdev->request_count--; |
468 | __zcrypt_increase_preference(zdev); | |
469 | put_device(&zdev->ap_dev->device); | |
470 | zcrypt_device_put(zdev); | |
471 | spin_unlock_bh(&zcrypt_device_lock); | |
472 | return rc; | |
473 | } | |
474 | spin_unlock_bh(&zcrypt_device_lock); | |
475 | return -ENODEV; | |
476 | } | |
477 | ||
2f7c8bd6 RW |
478 | static long zcrypt_rng(char *buffer) |
479 | { | |
480 | struct zcrypt_device *zdev; | |
481 | int rc; | |
482 | ||
483 | spin_lock_bh(&zcrypt_device_lock); | |
484 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
485 | if (!zdev->online || !zdev->ops->rng) | |
486 | continue; | |
487 | zcrypt_device_get(zdev); | |
488 | get_device(&zdev->ap_dev->device); | |
489 | zdev->request_count++; | |
490 | __zcrypt_decrease_preference(zdev); | |
491 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { | |
492 | spin_unlock_bh(&zcrypt_device_lock); | |
493 | rc = zdev->ops->rng(zdev, buffer); | |
494 | spin_lock_bh(&zcrypt_device_lock); | |
495 | module_put(zdev->ap_dev->drv->driver.owner); | |
496 | } else | |
497 | rc = -EAGAIN; | |
498 | zdev->request_count--; | |
499 | __zcrypt_increase_preference(zdev); | |
500 | put_device(&zdev->ap_dev->device); | |
501 | zcrypt_device_put(zdev); | |
502 | spin_unlock_bh(&zcrypt_device_lock); | |
503 | return rc; | |
504 | } | |
505 | spin_unlock_bh(&zcrypt_device_lock); | |
506 | return -ENODEV; | |
507 | } | |
508 | ||
2dbc2418 MS |
509 | static void zcrypt_status_mask(char status[AP_DEVICES]) |
510 | { | |
511 | struct zcrypt_device *zdev; | |
512 | ||
513 | memset(status, 0, sizeof(char) * AP_DEVICES); | |
514 | spin_lock_bh(&zcrypt_device_lock); | |
515 | list_for_each_entry(zdev, &zcrypt_device_list, list) | |
516 | status[AP_QID_DEVICE(zdev->ap_dev->qid)] = | |
517 | zdev->online ? zdev->user_space_type : 0x0d; | |
518 | spin_unlock_bh(&zcrypt_device_lock); | |
519 | } | |
520 | ||
521 | static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES]) | |
522 | { | |
523 | struct zcrypt_device *zdev; | |
524 | ||
525 | memset(qdepth, 0, sizeof(char) * AP_DEVICES); | |
526 | spin_lock_bh(&zcrypt_device_lock); | |
527 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
528 | spin_lock(&zdev->ap_dev->lock); | |
529 | qdepth[AP_QID_DEVICE(zdev->ap_dev->qid)] = | |
530 | zdev->ap_dev->pendingq_count + | |
531 | zdev->ap_dev->requestq_count; | |
532 | spin_unlock(&zdev->ap_dev->lock); | |
533 | } | |
534 | spin_unlock_bh(&zcrypt_device_lock); | |
535 | } | |
536 | ||
537 | static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES]) | |
538 | { | |
539 | struct zcrypt_device *zdev; | |
540 | ||
541 | memset(reqcnt, 0, sizeof(int) * AP_DEVICES); | |
542 | spin_lock_bh(&zcrypt_device_lock); | |
543 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
544 | spin_lock(&zdev->ap_dev->lock); | |
545 | reqcnt[AP_QID_DEVICE(zdev->ap_dev->qid)] = | |
546 | zdev->ap_dev->total_request_count; | |
547 | spin_unlock(&zdev->ap_dev->lock); | |
548 | } | |
549 | spin_unlock_bh(&zcrypt_device_lock); | |
550 | } | |
551 | ||
552 | static int zcrypt_pendingq_count(void) | |
553 | { | |
554 | struct zcrypt_device *zdev; | |
555 | int pendingq_count = 0; | |
556 | ||
557 | spin_lock_bh(&zcrypt_device_lock); | |
558 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
559 | spin_lock(&zdev->ap_dev->lock); | |
560 | pendingq_count += zdev->ap_dev->pendingq_count; | |
561 | spin_unlock(&zdev->ap_dev->lock); | |
562 | } | |
563 | spin_unlock_bh(&zcrypt_device_lock); | |
564 | return pendingq_count; | |
565 | } | |
566 | ||
567 | static int zcrypt_requestq_count(void) | |
568 | { | |
569 | struct zcrypt_device *zdev; | |
570 | int requestq_count = 0; | |
571 | ||
572 | spin_lock_bh(&zcrypt_device_lock); | |
573 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
574 | spin_lock(&zdev->ap_dev->lock); | |
575 | requestq_count += zdev->ap_dev->requestq_count; | |
576 | spin_unlock(&zdev->ap_dev->lock); | |
577 | } | |
578 | spin_unlock_bh(&zcrypt_device_lock); | |
579 | return requestq_count; | |
580 | } | |
581 | ||
582 | static int zcrypt_count_type(int type) | |
583 | { | |
584 | struct zcrypt_device *zdev; | |
585 | int device_count = 0; | |
586 | ||
587 | spin_lock_bh(&zcrypt_device_lock); | |
588 | list_for_each_entry(zdev, &zcrypt_device_list, list) | |
589 | if (zdev->user_space_type == type) | |
590 | device_count++; | |
591 | spin_unlock_bh(&zcrypt_device_lock); | |
592 | return device_count; | |
593 | } | |
594 | ||
595 | /** | |
1749a81d FB |
596 | * zcrypt_ica_status(): Old, depracted combi status call. |
597 | * | |
2dbc2418 MS |
598 | * Old, deprecated combi status call. |
599 | */ | |
600 | static long zcrypt_ica_status(struct file *filp, unsigned long arg) | |
601 | { | |
602 | struct ica_z90_status *pstat; | |
603 | int ret; | |
604 | ||
605 | pstat = kzalloc(sizeof(*pstat), GFP_KERNEL); | |
606 | if (!pstat) | |
607 | return -ENOMEM; | |
608 | pstat->totalcount = zcrypt_device_count; | |
609 | pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA); | |
610 | pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC); | |
611 | pstat->requestqWaitCount = zcrypt_requestq_count(); | |
612 | pstat->pendingqWaitCount = zcrypt_pendingq_count(); | |
613 | pstat->totalOpenCount = atomic_read(&zcrypt_open_count); | |
614 | pstat->cryptoDomain = ap_domain_index; | |
615 | zcrypt_status_mask(pstat->status); | |
616 | zcrypt_qdepth_mask(pstat->qdepth); | |
617 | ret = 0; | |
618 | if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat))) | |
619 | ret = -EFAULT; | |
620 | kfree(pstat); | |
621 | return ret; | |
622 | } | |
623 | ||
624 | static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, | |
625 | unsigned long arg) | |
626 | { | |
627 | int rc; | |
628 | ||
629 | switch (cmd) { | |
630 | case ICARSAMODEXPO: { | |
631 | struct ica_rsa_modexpo __user *umex = (void __user *) arg; | |
632 | struct ica_rsa_modexpo mex; | |
633 | if (copy_from_user(&mex, umex, sizeof(mex))) | |
634 | return -EFAULT; | |
635 | do { | |
636 | rc = zcrypt_rsa_modexpo(&mex); | |
637 | } while (rc == -EAGAIN); | |
638 | if (rc) | |
639 | return rc; | |
640 | return put_user(mex.outputdatalength, &umex->outputdatalength); | |
641 | } | |
642 | case ICARSACRT: { | |
643 | struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg; | |
644 | struct ica_rsa_modexpo_crt crt; | |
645 | if (copy_from_user(&crt, ucrt, sizeof(crt))) | |
646 | return -EFAULT; | |
647 | do { | |
648 | rc = zcrypt_rsa_crt(&crt); | |
649 | } while (rc == -EAGAIN); | |
650 | if (rc) | |
651 | return rc; | |
652 | return put_user(crt.outputdatalength, &ucrt->outputdatalength); | |
653 | } | |
5432114b RW |
654 | case ZSECSENDCPRB: { |
655 | struct ica_xcRB __user *uxcRB = (void __user *) arg; | |
656 | struct ica_xcRB xcRB; | |
657 | if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB))) | |
658 | return -EFAULT; | |
659 | do { | |
660 | rc = zcrypt_send_cprb(&xcRB); | |
661 | } while (rc == -EAGAIN); | |
662 | if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB))) | |
663 | return -EFAULT; | |
664 | return rc; | |
665 | } | |
2dbc2418 MS |
666 | case Z90STAT_STATUS_MASK: { |
667 | char status[AP_DEVICES]; | |
668 | zcrypt_status_mask(status); | |
669 | if (copy_to_user((char __user *) arg, status, | |
670 | sizeof(char) * AP_DEVICES)) | |
671 | return -EFAULT; | |
672 | return 0; | |
673 | } | |
674 | case Z90STAT_QDEPTH_MASK: { | |
675 | char qdepth[AP_DEVICES]; | |
676 | zcrypt_qdepth_mask(qdepth); | |
677 | if (copy_to_user((char __user *) arg, qdepth, | |
678 | sizeof(char) * AP_DEVICES)) | |
679 | return -EFAULT; | |
680 | return 0; | |
681 | } | |
682 | case Z90STAT_PERDEV_REQCNT: { | |
683 | int reqcnt[AP_DEVICES]; | |
684 | zcrypt_perdev_reqcnt(reqcnt); | |
685 | if (copy_to_user((int __user *) arg, reqcnt, | |
686 | sizeof(int) * AP_DEVICES)) | |
687 | return -EFAULT; | |
688 | return 0; | |
689 | } | |
690 | case Z90STAT_REQUESTQ_COUNT: | |
691 | return put_user(zcrypt_requestq_count(), (int __user *) arg); | |
692 | case Z90STAT_PENDINGQ_COUNT: | |
693 | return put_user(zcrypt_pendingq_count(), (int __user *) arg); | |
694 | case Z90STAT_TOTALOPEN_COUNT: | |
695 | return put_user(atomic_read(&zcrypt_open_count), | |
696 | (int __user *) arg); | |
697 | case Z90STAT_DOMAIN_INDEX: | |
698 | return put_user(ap_domain_index, (int __user *) arg); | |
1749a81d | 699 | /* |
2dbc2418 MS |
700 | * Deprecated ioctls. Don't add another device count ioctl, |
701 | * you can count them yourself in the user space with the | |
702 | * output of the Z90STAT_STATUS_MASK ioctl. | |
703 | */ | |
704 | case ICAZ90STATUS: | |
705 | return zcrypt_ica_status(filp, arg); | |
706 | case Z90STAT_TOTALCOUNT: | |
707 | return put_user(zcrypt_device_count, (int __user *) arg); | |
708 | case Z90STAT_PCICACOUNT: | |
709 | return put_user(zcrypt_count_type(ZCRYPT_PCICA), | |
710 | (int __user *) arg); | |
711 | case Z90STAT_PCICCCOUNT: | |
712 | return put_user(zcrypt_count_type(ZCRYPT_PCICC), | |
713 | (int __user *) arg); | |
714 | case Z90STAT_PCIXCCMCL2COUNT: | |
715 | return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2), | |
716 | (int __user *) arg); | |
717 | case Z90STAT_PCIXCCMCL3COUNT: | |
718 | return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3), | |
719 | (int __user *) arg); | |
720 | case Z90STAT_PCIXCCCOUNT: | |
721 | return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) + | |
722 | zcrypt_count_type(ZCRYPT_PCIXCC_MCL3), | |
723 | (int __user *) arg); | |
724 | case Z90STAT_CEX2CCOUNT: | |
725 | return put_user(zcrypt_count_type(ZCRYPT_CEX2C), | |
726 | (int __user *) arg); | |
727 | case Z90STAT_CEX2ACOUNT: | |
728 | return put_user(zcrypt_count_type(ZCRYPT_CEX2A), | |
729 | (int __user *) arg); | |
730 | default: | |
731 | /* unknown ioctl number */ | |
732 | return -ENOIOCTLCMD; | |
733 | } | |
734 | } | |
735 | ||
736 | #ifdef CONFIG_COMPAT | |
1749a81d | 737 | /* |
2dbc2418 MS |
738 | * ioctl32 conversion routines |
739 | */ | |
740 | struct compat_ica_rsa_modexpo { | |
741 | compat_uptr_t inputdata; | |
742 | unsigned int inputdatalength; | |
743 | compat_uptr_t outputdata; | |
744 | unsigned int outputdatalength; | |
745 | compat_uptr_t b_key; | |
746 | compat_uptr_t n_modulus; | |
747 | }; | |
748 | ||
749 | static long trans_modexpo32(struct file *filp, unsigned int cmd, | |
750 | unsigned long arg) | |
751 | { | |
752 | struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg); | |
753 | struct compat_ica_rsa_modexpo mex32; | |
754 | struct ica_rsa_modexpo mex64; | |
755 | long rc; | |
756 | ||
757 | if (copy_from_user(&mex32, umex32, sizeof(mex32))) | |
758 | return -EFAULT; | |
759 | mex64.inputdata = compat_ptr(mex32.inputdata); | |
760 | mex64.inputdatalength = mex32.inputdatalength; | |
761 | mex64.outputdata = compat_ptr(mex32.outputdata); | |
762 | mex64.outputdatalength = mex32.outputdatalength; | |
763 | mex64.b_key = compat_ptr(mex32.b_key); | |
764 | mex64.n_modulus = compat_ptr(mex32.n_modulus); | |
765 | do { | |
766 | rc = zcrypt_rsa_modexpo(&mex64); | |
767 | } while (rc == -EAGAIN); | |
768 | if (!rc) | |
769 | rc = put_user(mex64.outputdatalength, | |
770 | &umex32->outputdatalength); | |
771 | return rc; | |
772 | } | |
773 | ||
774 | struct compat_ica_rsa_modexpo_crt { | |
775 | compat_uptr_t inputdata; | |
776 | unsigned int inputdatalength; | |
777 | compat_uptr_t outputdata; | |
778 | unsigned int outputdatalength; | |
779 | compat_uptr_t bp_key; | |
780 | compat_uptr_t bq_key; | |
781 | compat_uptr_t np_prime; | |
782 | compat_uptr_t nq_prime; | |
783 | compat_uptr_t u_mult_inv; | |
784 | }; | |
785 | ||
786 | static long trans_modexpo_crt32(struct file *filp, unsigned int cmd, | |
787 | unsigned long arg) | |
788 | { | |
789 | struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg); | |
790 | struct compat_ica_rsa_modexpo_crt crt32; | |
791 | struct ica_rsa_modexpo_crt crt64; | |
792 | long rc; | |
793 | ||
794 | if (copy_from_user(&crt32, ucrt32, sizeof(crt32))) | |
795 | return -EFAULT; | |
796 | crt64.inputdata = compat_ptr(crt32.inputdata); | |
797 | crt64.inputdatalength = crt32.inputdatalength; | |
798 | crt64.outputdata= compat_ptr(crt32.outputdata); | |
799 | crt64.outputdatalength = crt32.outputdatalength; | |
800 | crt64.bp_key = compat_ptr(crt32.bp_key); | |
801 | crt64.bq_key = compat_ptr(crt32.bq_key); | |
802 | crt64.np_prime = compat_ptr(crt32.np_prime); | |
803 | crt64.nq_prime = compat_ptr(crt32.nq_prime); | |
804 | crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv); | |
805 | do { | |
806 | rc = zcrypt_rsa_crt(&crt64); | |
807 | } while (rc == -EAGAIN); | |
808 | if (!rc) | |
809 | rc = put_user(crt64.outputdatalength, | |
810 | &ucrt32->outputdatalength); | |
811 | return rc; | |
812 | } | |
813 | ||
5432114b RW |
814 | struct compat_ica_xcRB { |
815 | unsigned short agent_ID; | |
816 | unsigned int user_defined; | |
817 | unsigned short request_ID; | |
818 | unsigned int request_control_blk_length; | |
819 | unsigned char padding1[16 - sizeof (compat_uptr_t)]; | |
820 | compat_uptr_t request_control_blk_addr; | |
821 | unsigned int request_data_length; | |
822 | char padding2[16 - sizeof (compat_uptr_t)]; | |
823 | compat_uptr_t request_data_address; | |
824 | unsigned int reply_control_blk_length; | |
825 | char padding3[16 - sizeof (compat_uptr_t)]; | |
826 | compat_uptr_t reply_control_blk_addr; | |
827 | unsigned int reply_data_length; | |
828 | char padding4[16 - sizeof (compat_uptr_t)]; | |
829 | compat_uptr_t reply_data_addr; | |
830 | unsigned short priority_window; | |
831 | unsigned int status; | |
832 | } __attribute__((packed)); | |
833 | ||
834 | static long trans_xcRB32(struct file *filp, unsigned int cmd, | |
835 | unsigned long arg) | |
836 | { | |
837 | struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg); | |
838 | struct compat_ica_xcRB xcRB32; | |
839 | struct ica_xcRB xcRB64; | |
840 | long rc; | |
841 | ||
842 | if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32))) | |
843 | return -EFAULT; | |
844 | xcRB64.agent_ID = xcRB32.agent_ID; | |
845 | xcRB64.user_defined = xcRB32.user_defined; | |
846 | xcRB64.request_ID = xcRB32.request_ID; | |
847 | xcRB64.request_control_blk_length = | |
848 | xcRB32.request_control_blk_length; | |
849 | xcRB64.request_control_blk_addr = | |
850 | compat_ptr(xcRB32.request_control_blk_addr); | |
851 | xcRB64.request_data_length = | |
852 | xcRB32.request_data_length; | |
853 | xcRB64.request_data_address = | |
854 | compat_ptr(xcRB32.request_data_address); | |
855 | xcRB64.reply_control_blk_length = | |
856 | xcRB32.reply_control_blk_length; | |
857 | xcRB64.reply_control_blk_addr = | |
858 | compat_ptr(xcRB32.reply_control_blk_addr); | |
859 | xcRB64.reply_data_length = xcRB32.reply_data_length; | |
860 | xcRB64.reply_data_addr = | |
861 | compat_ptr(xcRB32.reply_data_addr); | |
862 | xcRB64.priority_window = xcRB32.priority_window; | |
863 | xcRB64.status = xcRB32.status; | |
864 | do { | |
865 | rc = zcrypt_send_cprb(&xcRB64); | |
866 | } while (rc == -EAGAIN); | |
867 | xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length; | |
868 | xcRB32.reply_data_length = xcRB64.reply_data_length; | |
869 | xcRB32.status = xcRB64.status; | |
870 | if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32))) | |
871 | return -EFAULT; | |
872 | return rc; | |
873 | } | |
874 | ||
2b67fc46 | 875 | static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd, |
2dbc2418 MS |
876 | unsigned long arg) |
877 | { | |
878 | if (cmd == ICARSAMODEXPO) | |
879 | return trans_modexpo32(filp, cmd, arg); | |
880 | if (cmd == ICARSACRT) | |
881 | return trans_modexpo_crt32(filp, cmd, arg); | |
5432114b RW |
882 | if (cmd == ZSECSENDCPRB) |
883 | return trans_xcRB32(filp, cmd, arg); | |
2dbc2418 MS |
884 | return zcrypt_unlocked_ioctl(filp, cmd, arg); |
885 | } | |
886 | #endif | |
887 | ||
1749a81d | 888 | /* |
2dbc2418 MS |
889 | * Misc device file operations. |
890 | */ | |
d54b1fdb | 891 | static const struct file_operations zcrypt_fops = { |
2dbc2418 MS |
892 | .owner = THIS_MODULE, |
893 | .read = zcrypt_read, | |
894 | .write = zcrypt_write, | |
895 | .unlocked_ioctl = zcrypt_unlocked_ioctl, | |
896 | #ifdef CONFIG_COMPAT | |
897 | .compat_ioctl = zcrypt_compat_ioctl, | |
898 | #endif | |
899 | .open = zcrypt_open, | |
900 | .release = zcrypt_release | |
901 | }; | |
902 | ||
1749a81d | 903 | /* |
2dbc2418 MS |
904 | * Misc device. |
905 | */ | |
906 | static struct miscdevice zcrypt_misc_device = { | |
907 | .minor = MISC_DYNAMIC_MINOR, | |
908 | .name = "z90crypt", | |
909 | .fops = &zcrypt_fops, | |
910 | }; | |
911 | ||
1749a81d | 912 | /* |
2dbc2418 MS |
913 | * Deprecated /proc entry support. |
914 | */ | |
915 | static struct proc_dir_entry *zcrypt_entry; | |
916 | ||
4d284cac HC |
917 | static int sprintcl(unsigned char *outaddr, unsigned char *addr, |
918 | unsigned int len) | |
2dbc2418 MS |
919 | { |
920 | int hl, i; | |
921 | ||
922 | hl = 0; | |
923 | for (i = 0; i < len; i++) | |
924 | hl += sprintf(outaddr+hl, "%01x", (unsigned int) addr[i]); | |
925 | hl += sprintf(outaddr+hl, " "); | |
926 | return hl; | |
927 | } | |
928 | ||
4d284cac HC |
929 | static int sprintrw(unsigned char *outaddr, unsigned char *addr, |
930 | unsigned int len) | |
2dbc2418 MS |
931 | { |
932 | int hl, inl, c, cx; | |
933 | ||
934 | hl = sprintf(outaddr, " "); | |
935 | inl = 0; | |
936 | for (c = 0; c < (len / 16); c++) { | |
937 | hl += sprintcl(outaddr+hl, addr+inl, 16); | |
938 | inl += 16; | |
939 | } | |
940 | cx = len%16; | |
941 | if (cx) { | |
942 | hl += sprintcl(outaddr+hl, addr+inl, cx); | |
943 | inl += cx; | |
944 | } | |
945 | hl += sprintf(outaddr+hl, "\n"); | |
946 | return hl; | |
947 | } | |
948 | ||
4d284cac HC |
949 | static int sprinthx(unsigned char *title, unsigned char *outaddr, |
950 | unsigned char *addr, unsigned int len) | |
2dbc2418 MS |
951 | { |
952 | int hl, inl, r, rx; | |
953 | ||
954 | hl = sprintf(outaddr, "\n%s\n", title); | |
955 | inl = 0; | |
956 | for (r = 0; r < (len / 64); r++) { | |
957 | hl += sprintrw(outaddr+hl, addr+inl, 64); | |
958 | inl += 64; | |
959 | } | |
960 | rx = len % 64; | |
961 | if (rx) { | |
962 | hl += sprintrw(outaddr+hl, addr+inl, rx); | |
963 | inl += rx; | |
964 | } | |
965 | hl += sprintf(outaddr+hl, "\n"); | |
966 | return hl; | |
967 | } | |
968 | ||
4d284cac HC |
969 | static int sprinthx4(unsigned char *title, unsigned char *outaddr, |
970 | unsigned int *array, unsigned int len) | |
2dbc2418 MS |
971 | { |
972 | int hl, r; | |
973 | ||
974 | hl = sprintf(outaddr, "\n%s\n", title); | |
975 | for (r = 0; r < len; r++) { | |
976 | if ((r % 8) == 0) | |
977 | hl += sprintf(outaddr+hl, " "); | |
978 | hl += sprintf(outaddr+hl, "%08X ", array[r]); | |
979 | if ((r % 8) == 7) | |
980 | hl += sprintf(outaddr+hl, "\n"); | |
981 | } | |
982 | hl += sprintf(outaddr+hl, "\n"); | |
983 | return hl; | |
984 | } | |
985 | ||
986 | static int zcrypt_status_read(char *resp_buff, char **start, off_t offset, | |
987 | int count, int *eof, void *data) | |
988 | { | |
989 | unsigned char *workarea; | |
990 | int len; | |
991 | ||
992 | len = 0; | |
993 | ||
994 | /* resp_buff is a page. Use the right half for a work area */ | |
995 | workarea = resp_buff + 2000; | |
996 | len += sprintf(resp_buff + len, "\nzcrypt version: %d.%d.%d\n", | |
997 | ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT); | |
998 | len += sprintf(resp_buff + len, "Cryptographic domain: %d\n", | |
999 | ap_domain_index); | |
1000 | len += sprintf(resp_buff + len, "Total device count: %d\n", | |
1001 | zcrypt_device_count); | |
1002 | len += sprintf(resp_buff + len, "PCICA count: %d\n", | |
1003 | zcrypt_count_type(ZCRYPT_PCICA)); | |
1004 | len += sprintf(resp_buff + len, "PCICC count: %d\n", | |
1005 | zcrypt_count_type(ZCRYPT_PCICC)); | |
1006 | len += sprintf(resp_buff + len, "PCIXCC MCL2 count: %d\n", | |
1007 | zcrypt_count_type(ZCRYPT_PCIXCC_MCL2)); | |
1008 | len += sprintf(resp_buff + len, "PCIXCC MCL3 count: %d\n", | |
1009 | zcrypt_count_type(ZCRYPT_PCIXCC_MCL3)); | |
1010 | len += sprintf(resp_buff + len, "CEX2C count: %d\n", | |
1011 | zcrypt_count_type(ZCRYPT_CEX2C)); | |
1012 | len += sprintf(resp_buff + len, "CEX2A count: %d\n", | |
1013 | zcrypt_count_type(ZCRYPT_CEX2A)); | |
1014 | len += sprintf(resp_buff + len, "requestq count: %d\n", | |
1015 | zcrypt_requestq_count()); | |
1016 | len += sprintf(resp_buff + len, "pendingq count: %d\n", | |
1017 | zcrypt_pendingq_count()); | |
1018 | len += sprintf(resp_buff + len, "Total open handles: %d\n\n", | |
1019 | atomic_read(&zcrypt_open_count)); | |
1020 | zcrypt_status_mask(workarea); | |
1021 | len += sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) " | |
1022 | "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A", | |
1023 | resp_buff+len, workarea, AP_DEVICES); | |
1024 | zcrypt_qdepth_mask(workarea); | |
1025 | len += sprinthx("Waiting work element counts", | |
1026 | resp_buff+len, workarea, AP_DEVICES); | |
2b67fc46 | 1027 | zcrypt_perdev_reqcnt((int *) workarea); |
2dbc2418 MS |
1028 | len += sprinthx4("Per-device successfully completed request counts", |
1029 | resp_buff+len,(unsigned int *) workarea, AP_DEVICES); | |
1030 | *eof = 1; | |
1031 | memset((void *) workarea, 0x00, AP_DEVICES * sizeof(unsigned int)); | |
1032 | return len; | |
1033 | } | |
1034 | ||
1035 | static void zcrypt_disable_card(int index) | |
1036 | { | |
1037 | struct zcrypt_device *zdev; | |
1038 | ||
1039 | spin_lock_bh(&zcrypt_device_lock); | |
1040 | list_for_each_entry(zdev, &zcrypt_device_list, list) | |
1041 | if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) { | |
1042 | zdev->online = 0; | |
1043 | ap_flush_queue(zdev->ap_dev); | |
1044 | break; | |
1045 | } | |
1046 | spin_unlock_bh(&zcrypt_device_lock); | |
1047 | } | |
1048 | ||
1049 | static void zcrypt_enable_card(int index) | |
1050 | { | |
1051 | struct zcrypt_device *zdev; | |
1052 | ||
1053 | spin_lock_bh(&zcrypt_device_lock); | |
1054 | list_for_each_entry(zdev, &zcrypt_device_list, list) | |
1055 | if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) { | |
1056 | zdev->online = 1; | |
1057 | break; | |
1058 | } | |
1059 | spin_unlock_bh(&zcrypt_device_lock); | |
1060 | } | |
1061 | ||
1062 | static int zcrypt_status_write(struct file *file, const char __user *buffer, | |
1063 | unsigned long count, void *data) | |
1064 | { | |
1065 | unsigned char *lbuf, *ptr; | |
1066 | unsigned long local_count; | |
1067 | int j; | |
1068 | ||
1069 | if (count <= 0) | |
1070 | return 0; | |
1071 | ||
1072 | #define LBUFSIZE 1200UL | |
1073 | lbuf = kmalloc(LBUFSIZE, GFP_KERNEL); | |
1a89dd8f | 1074 | if (!lbuf) |
2dbc2418 | 1075 | return 0; |
2dbc2418 MS |
1076 | |
1077 | local_count = min(LBUFSIZE - 1, count); | |
1078 | if (copy_from_user(lbuf, buffer, local_count) != 0) { | |
1079 | kfree(lbuf); | |
1080 | return -EFAULT; | |
1081 | } | |
1082 | lbuf[local_count] = '\0'; | |
1083 | ||
1084 | ptr = strstr(lbuf, "Online devices"); | |
1a89dd8f | 1085 | if (!ptr) |
2dbc2418 | 1086 | goto out; |
2dbc2418 | 1087 | ptr = strstr(ptr, "\n"); |
1a89dd8f | 1088 | if (!ptr) |
2dbc2418 | 1089 | goto out; |
2dbc2418 MS |
1090 | ptr++; |
1091 | ||
1a89dd8f | 1092 | if (strstr(ptr, "Waiting work element counts") == NULL) |
2dbc2418 | 1093 | goto out; |
2dbc2418 MS |
1094 | |
1095 | for (j = 0; j < 64 && *ptr; ptr++) { | |
1749a81d | 1096 | /* |
2dbc2418 MS |
1097 | * '0' for no device, '1' for PCICA, '2' for PCICC, |
1098 | * '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3, | |
1099 | * '5' for CEX2C and '6' for CEX2A' | |
1100 | */ | |
1101 | if (*ptr >= '0' && *ptr <= '6') | |
1102 | j++; | |
1103 | else if (*ptr == 'd' || *ptr == 'D') | |
1104 | zcrypt_disable_card(j++); | |
1105 | else if (*ptr == 'e' || *ptr == 'E') | |
1106 | zcrypt_enable_card(j++); | |
1107 | else if (*ptr != ' ' && *ptr != '\t') | |
1108 | break; | |
1109 | } | |
1110 | out: | |
1111 | kfree(lbuf); | |
1112 | return count; | |
1113 | } | |
1114 | ||
2f7c8bd6 RW |
1115 | static int zcrypt_rng_device_count; |
1116 | static u32 *zcrypt_rng_buffer; | |
1117 | static int zcrypt_rng_buffer_index; | |
1118 | static DEFINE_MUTEX(zcrypt_rng_mutex); | |
1119 | ||
1120 | static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data) | |
1121 | { | |
1122 | int rc; | |
1123 | ||
1749a81d | 1124 | /* |
2f7c8bd6 RW |
1125 | * We don't need locking here because the RNG API guarantees serialized |
1126 | * read method calls. | |
1127 | */ | |
1128 | if (zcrypt_rng_buffer_index == 0) { | |
1129 | rc = zcrypt_rng((char *) zcrypt_rng_buffer); | |
1130 | if (rc < 0) | |
1131 | return -EIO; | |
1132 | zcrypt_rng_buffer_index = rc / sizeof *data; | |
1133 | } | |
1134 | *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index]; | |
1135 | return sizeof *data; | |
1136 | } | |
1137 | ||
1138 | static struct hwrng zcrypt_rng_dev = { | |
1139 | .name = "zcrypt", | |
1140 | .data_read = zcrypt_rng_data_read, | |
1141 | }; | |
1142 | ||
1143 | static int zcrypt_rng_device_add(void) | |
1144 | { | |
1145 | int rc = 0; | |
1146 | ||
1147 | mutex_lock(&zcrypt_rng_mutex); | |
1148 | if (zcrypt_rng_device_count == 0) { | |
1149 | zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL); | |
1150 | if (!zcrypt_rng_buffer) { | |
1151 | rc = -ENOMEM; | |
1152 | goto out; | |
1153 | } | |
1154 | zcrypt_rng_buffer_index = 0; | |
1155 | rc = hwrng_register(&zcrypt_rng_dev); | |
1156 | if (rc) | |
1157 | goto out_free; | |
1158 | zcrypt_rng_device_count = 1; | |
1159 | } else | |
1160 | zcrypt_rng_device_count++; | |
1161 | mutex_unlock(&zcrypt_rng_mutex); | |
1162 | return 0; | |
1163 | ||
1164 | out_free: | |
1165 | free_page((unsigned long) zcrypt_rng_buffer); | |
1166 | out: | |
1167 | mutex_unlock(&zcrypt_rng_mutex); | |
1168 | return rc; | |
1169 | } | |
1170 | ||
1171 | static void zcrypt_rng_device_remove(void) | |
1172 | { | |
1173 | mutex_lock(&zcrypt_rng_mutex); | |
1174 | zcrypt_rng_device_count--; | |
1175 | if (zcrypt_rng_device_count == 0) { | |
1176 | hwrng_unregister(&zcrypt_rng_dev); | |
1177 | free_page((unsigned long) zcrypt_rng_buffer); | |
1178 | } | |
1179 | mutex_unlock(&zcrypt_rng_mutex); | |
1180 | } | |
1181 | ||
2dbc2418 | 1182 | /** |
1749a81d FB |
1183 | * zcrypt_api_init(): Module initialization. |
1184 | * | |
2dbc2418 MS |
1185 | * The module initialization code. |
1186 | */ | |
1187 | int __init zcrypt_api_init(void) | |
1188 | { | |
1189 | int rc; | |
1190 | ||
1191 | /* Register the request sprayer. */ | |
1192 | rc = misc_register(&zcrypt_misc_device); | |
1a89dd8f | 1193 | if (rc < 0) |
2dbc2418 | 1194 | goto out; |
2dbc2418 MS |
1195 | |
1196 | /* Set up the proc file system */ | |
1197 | zcrypt_entry = create_proc_entry("driver/z90crypt", 0644, NULL); | |
1198 | if (!zcrypt_entry) { | |
2dbc2418 MS |
1199 | rc = -ENOMEM; |
1200 | goto out_misc; | |
1201 | } | |
2dbc2418 MS |
1202 | zcrypt_entry->data = NULL; |
1203 | zcrypt_entry->read_proc = zcrypt_status_read; | |
1204 | zcrypt_entry->write_proc = zcrypt_status_write; | |
1205 | ||
1206 | return 0; | |
1207 | ||
1208 | out_misc: | |
1209 | misc_deregister(&zcrypt_misc_device); | |
1210 | out: | |
1211 | return rc; | |
1212 | } | |
1213 | ||
1214 | /** | |
1749a81d FB |
1215 | * zcrypt_api_exit(): Module termination. |
1216 | * | |
2dbc2418 MS |
1217 | * The module termination code. |
1218 | */ | |
1219 | void zcrypt_api_exit(void) | |
1220 | { | |
1221 | remove_proc_entry("driver/z90crypt", NULL); | |
1222 | misc_deregister(&zcrypt_misc_device); | |
1223 | } | |
1224 | ||
1225 | #ifndef CONFIG_ZCRYPT_MONOLITHIC | |
1226 | module_init(zcrypt_api_init); | |
1227 | module_exit(zcrypt_api_exit); | |
1228 | #endif |