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> | |
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 */ | |
1fbc9f46 | 131 | list_move(&zdev->list, l); |
2dbc2418 MS |
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 */ | |
1fbc9f46 | 159 | list_move_tail(&zdev->list, l); |
2dbc2418 MS |
160 | } |
161 | ||
162 | static void zcrypt_device_release(struct kref *kref) | |
163 | { | |
164 | struct zcrypt_device *zdev = | |
165 | container_of(kref, struct zcrypt_device, refcount); | |
166 | zcrypt_device_free(zdev); | |
167 | } | |
168 | ||
169 | void zcrypt_device_get(struct zcrypt_device *zdev) | |
170 | { | |
171 | kref_get(&zdev->refcount); | |
172 | } | |
173 | EXPORT_SYMBOL(zcrypt_device_get); | |
174 | ||
175 | int zcrypt_device_put(struct zcrypt_device *zdev) | |
176 | { | |
177 | return kref_put(&zdev->refcount, zcrypt_device_release); | |
178 | } | |
179 | EXPORT_SYMBOL(zcrypt_device_put); | |
180 | ||
181 | struct zcrypt_device *zcrypt_device_alloc(size_t max_response_size) | |
182 | { | |
183 | struct zcrypt_device *zdev; | |
184 | ||
185 | zdev = kzalloc(sizeof(struct zcrypt_device), GFP_KERNEL); | |
186 | if (!zdev) | |
187 | return NULL; | |
188 | zdev->reply.message = kmalloc(max_response_size, GFP_KERNEL); | |
189 | if (!zdev->reply.message) | |
190 | goto out_free; | |
191 | zdev->reply.length = max_response_size; | |
192 | spin_lock_init(&zdev->lock); | |
193 | INIT_LIST_HEAD(&zdev->list); | |
194 | return zdev; | |
195 | ||
196 | out_free: | |
197 | kfree(zdev); | |
198 | return NULL; | |
199 | } | |
200 | EXPORT_SYMBOL(zcrypt_device_alloc); | |
201 | ||
202 | void zcrypt_device_free(struct zcrypt_device *zdev) | |
203 | { | |
204 | kfree(zdev->reply.message); | |
205 | kfree(zdev); | |
206 | } | |
207 | EXPORT_SYMBOL(zcrypt_device_free); | |
208 | ||
209 | /** | |
1749a81d FB |
210 | * zcrypt_device_register() - Register a crypto device. |
211 | * @zdev: Pointer to a crypto device | |
212 | * | |
213 | * Register a crypto device. Returns 0 if successful. | |
2dbc2418 MS |
214 | */ |
215 | int zcrypt_device_register(struct zcrypt_device *zdev) | |
216 | { | |
217 | int rc; | |
218 | ||
219 | rc = sysfs_create_group(&zdev->ap_dev->device.kobj, | |
220 | &zcrypt_device_attr_group); | |
221 | if (rc) | |
222 | goto out; | |
223 | get_device(&zdev->ap_dev->device); | |
224 | kref_init(&zdev->refcount); | |
225 | spin_lock_bh(&zcrypt_device_lock); | |
226 | zdev->online = 1; /* New devices are online by default. */ | |
227 | list_add_tail(&zdev->list, &zcrypt_device_list); | |
228 | __zcrypt_increase_preference(zdev); | |
229 | zcrypt_device_count++; | |
230 | spin_unlock_bh(&zcrypt_device_lock); | |
2f7c8bd6 RW |
231 | if (zdev->ops->rng) { |
232 | rc = zcrypt_rng_device_add(); | |
233 | if (rc) | |
234 | goto out_unregister; | |
235 | } | |
236 | return 0; | |
237 | ||
238 | out_unregister: | |
239 | spin_lock_bh(&zcrypt_device_lock); | |
240 | zcrypt_device_count--; | |
241 | list_del_init(&zdev->list); | |
242 | spin_unlock_bh(&zcrypt_device_lock); | |
243 | sysfs_remove_group(&zdev->ap_dev->device.kobj, | |
244 | &zcrypt_device_attr_group); | |
245 | put_device(&zdev->ap_dev->device); | |
246 | zcrypt_device_put(zdev); | |
2dbc2418 MS |
247 | out: |
248 | return rc; | |
249 | } | |
250 | EXPORT_SYMBOL(zcrypt_device_register); | |
251 | ||
252 | /** | |
1749a81d FB |
253 | * zcrypt_device_unregister(): Unregister a crypto device. |
254 | * @zdev: Pointer to crypto device | |
255 | * | |
2dbc2418 MS |
256 | * Unregister a crypto device. |
257 | */ | |
258 | void zcrypt_device_unregister(struct zcrypt_device *zdev) | |
259 | { | |
2f7c8bd6 RW |
260 | if (zdev->ops->rng) |
261 | zcrypt_rng_device_remove(); | |
2dbc2418 MS |
262 | spin_lock_bh(&zcrypt_device_lock); |
263 | zcrypt_device_count--; | |
264 | list_del_init(&zdev->list); | |
265 | spin_unlock_bh(&zcrypt_device_lock); | |
266 | sysfs_remove_group(&zdev->ap_dev->device.kobj, | |
267 | &zcrypt_device_attr_group); | |
268 | put_device(&zdev->ap_dev->device); | |
269 | zcrypt_device_put(zdev); | |
270 | } | |
271 | EXPORT_SYMBOL(zcrypt_device_unregister); | |
272 | ||
273 | /** | |
1749a81d FB |
274 | * zcrypt_read (): Not supported beyond zcrypt 1.3.1. |
275 | * | |
276 | * This function is not supported beyond zcrypt 1.3.1. | |
2dbc2418 MS |
277 | */ |
278 | static ssize_t zcrypt_read(struct file *filp, char __user *buf, | |
279 | size_t count, loff_t *f_pos) | |
280 | { | |
281 | return -EPERM; | |
282 | } | |
283 | ||
284 | /** | |
1749a81d FB |
285 | * zcrypt_write(): Not allowed. |
286 | * | |
2dbc2418 MS |
287 | * Write is is not allowed |
288 | */ | |
289 | static ssize_t zcrypt_write(struct file *filp, const char __user *buf, | |
290 | size_t count, loff_t *f_pos) | |
291 | { | |
292 | return -EPERM; | |
293 | } | |
294 | ||
295 | /** | |
1749a81d FB |
296 | * zcrypt_open(): Count number of users. |
297 | * | |
298 | * Device open function to count number of users. | |
2dbc2418 MS |
299 | */ |
300 | static int zcrypt_open(struct inode *inode, struct file *filp) | |
301 | { | |
302 | atomic_inc(&zcrypt_open_count); | |
303 | return 0; | |
304 | } | |
305 | ||
1749a81d FB |
306 | /** |
307 | * zcrypt_release(): Count number of users. | |
308 | * | |
309 | * Device close function to count number of users. | |
310 | */ | |
2dbc2418 MS |
311 | static int zcrypt_release(struct inode *inode, struct file *filp) |
312 | { | |
313 | atomic_dec(&zcrypt_open_count); | |
314 | return 0; | |
315 | } | |
316 | ||
1749a81d | 317 | /* |
2dbc2418 MS |
318 | * zcrypt ioctls. |
319 | */ | |
320 | static long zcrypt_rsa_modexpo(struct ica_rsa_modexpo *mex) | |
321 | { | |
322 | struct zcrypt_device *zdev; | |
323 | int rc; | |
324 | ||
325 | if (mex->outputdatalength < mex->inputdatalength) | |
326 | return -EINVAL; | |
1749a81d | 327 | /* |
2dbc2418 MS |
328 | * As long as outputdatalength is big enough, we can set the |
329 | * outputdatalength equal to the inputdatalength, since that is the | |
330 | * number of bytes we will copy in any case | |
331 | */ | |
332 | mex->outputdatalength = mex->inputdatalength; | |
333 | ||
334 | spin_lock_bh(&zcrypt_device_lock); | |
335 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
336 | if (!zdev->online || | |
337 | !zdev->ops->rsa_modexpo || | |
338 | zdev->min_mod_size > mex->inputdatalength || | |
339 | zdev->max_mod_size < mex->inputdatalength) | |
340 | continue; | |
341 | zcrypt_device_get(zdev); | |
342 | get_device(&zdev->ap_dev->device); | |
343 | zdev->request_count++; | |
344 | __zcrypt_decrease_preference(zdev); | |
2dbc2418 | 345 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
43a867a2 | 346 | spin_unlock_bh(&zcrypt_device_lock); |
2dbc2418 | 347 | rc = zdev->ops->rsa_modexpo(zdev, mex); |
43a867a2 | 348 | spin_lock_bh(&zcrypt_device_lock); |
2dbc2418 MS |
349 | module_put(zdev->ap_dev->drv->driver.owner); |
350 | } | |
351 | else | |
352 | rc = -EAGAIN; | |
2dbc2418 MS |
353 | zdev->request_count--; |
354 | __zcrypt_increase_preference(zdev); | |
355 | put_device(&zdev->ap_dev->device); | |
356 | zcrypt_device_put(zdev); | |
357 | spin_unlock_bh(&zcrypt_device_lock); | |
358 | return rc; | |
359 | } | |
360 | spin_unlock_bh(&zcrypt_device_lock); | |
361 | return -ENODEV; | |
362 | } | |
363 | ||
364 | static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt) | |
365 | { | |
366 | struct zcrypt_device *zdev; | |
367 | unsigned long long z1, z2, z3; | |
368 | int rc, copied; | |
369 | ||
370 | if (crt->outputdatalength < crt->inputdatalength || | |
371 | (crt->inputdatalength & 1)) | |
372 | return -EINVAL; | |
1749a81d | 373 | /* |
2dbc2418 MS |
374 | * As long as outputdatalength is big enough, we can set the |
375 | * outputdatalength equal to the inputdatalength, since that is the | |
376 | * number of bytes we will copy in any case | |
377 | */ | |
378 | crt->outputdatalength = crt->inputdatalength; | |
379 | ||
380 | copied = 0; | |
381 | restart: | |
382 | spin_lock_bh(&zcrypt_device_lock); | |
383 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
384 | if (!zdev->online || | |
385 | !zdev->ops->rsa_modexpo_crt || | |
386 | zdev->min_mod_size > crt->inputdatalength || | |
387 | zdev->max_mod_size < crt->inputdatalength) | |
388 | continue; | |
389 | if (zdev->short_crt && crt->inputdatalength > 240) { | |
1749a81d | 390 | /* |
2dbc2418 MS |
391 | * Check inputdata for leading zeros for cards |
392 | * that can't handle np_prime, bp_key, or | |
393 | * u_mult_inv > 128 bytes. | |
394 | */ | |
395 | if (copied == 0) { | |
396 | int len; | |
397 | spin_unlock_bh(&zcrypt_device_lock); | |
398 | /* len is max 256 / 2 - 120 = 8 */ | |
399 | len = crt->inputdatalength / 2 - 120; | |
400 | z1 = z2 = z3 = 0; | |
401 | if (copy_from_user(&z1, crt->np_prime, len) || | |
402 | copy_from_user(&z2, crt->bp_key, len) || | |
403 | copy_from_user(&z3, crt->u_mult_inv, len)) | |
404 | return -EFAULT; | |
405 | copied = 1; | |
1749a81d | 406 | /* |
2dbc2418 MS |
407 | * We have to restart device lookup - |
408 | * the device list may have changed by now. | |
409 | */ | |
410 | goto restart; | |
411 | } | |
412 | if (z1 != 0ULL || z2 != 0ULL || z3 != 0ULL) | |
413 | /* The device can't handle this request. */ | |
414 | continue; | |
415 | } | |
416 | zcrypt_device_get(zdev); | |
417 | get_device(&zdev->ap_dev->device); | |
418 | zdev->request_count++; | |
419 | __zcrypt_decrease_preference(zdev); | |
2dbc2418 | 420 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
43a867a2 | 421 | spin_unlock_bh(&zcrypt_device_lock); |
2dbc2418 | 422 | rc = zdev->ops->rsa_modexpo_crt(zdev, crt); |
43a867a2 | 423 | spin_lock_bh(&zcrypt_device_lock); |
2dbc2418 MS |
424 | module_put(zdev->ap_dev->drv->driver.owner); |
425 | } | |
426 | else | |
427 | rc = -EAGAIN; | |
2dbc2418 MS |
428 | zdev->request_count--; |
429 | __zcrypt_increase_preference(zdev); | |
430 | put_device(&zdev->ap_dev->device); | |
431 | zcrypt_device_put(zdev); | |
432 | spin_unlock_bh(&zcrypt_device_lock); | |
433 | return rc; | |
434 | } | |
435 | spin_unlock_bh(&zcrypt_device_lock); | |
436 | return -ENODEV; | |
437 | } | |
438 | ||
5432114b RW |
439 | static long zcrypt_send_cprb(struct ica_xcRB *xcRB) |
440 | { | |
441 | struct zcrypt_device *zdev; | |
442 | int rc; | |
443 | ||
444 | spin_lock_bh(&zcrypt_device_lock); | |
445 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
446 | if (!zdev->online || !zdev->ops->send_cprb || | |
447 | (xcRB->user_defined != AUTOSELECT && | |
448 | AP_QID_DEVICE(zdev->ap_dev->qid) != xcRB->user_defined) | |
449 | ) | |
450 | continue; | |
451 | zcrypt_device_get(zdev); | |
452 | get_device(&zdev->ap_dev->device); | |
453 | zdev->request_count++; | |
454 | __zcrypt_decrease_preference(zdev); | |
5432114b | 455 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
43a867a2 | 456 | spin_unlock_bh(&zcrypt_device_lock); |
5432114b | 457 | rc = zdev->ops->send_cprb(zdev, xcRB); |
43a867a2 | 458 | spin_lock_bh(&zcrypt_device_lock); |
5432114b RW |
459 | module_put(zdev->ap_dev->drv->driver.owner); |
460 | } | |
461 | else | |
462 | rc = -EAGAIN; | |
5432114b RW |
463 | zdev->request_count--; |
464 | __zcrypt_increase_preference(zdev); | |
465 | put_device(&zdev->ap_dev->device); | |
466 | zcrypt_device_put(zdev); | |
467 | spin_unlock_bh(&zcrypt_device_lock); | |
468 | return rc; | |
469 | } | |
470 | spin_unlock_bh(&zcrypt_device_lock); | |
471 | return -ENODEV; | |
472 | } | |
473 | ||
2f7c8bd6 RW |
474 | static long zcrypt_rng(char *buffer) |
475 | { | |
476 | struct zcrypt_device *zdev; | |
477 | int rc; | |
478 | ||
479 | spin_lock_bh(&zcrypt_device_lock); | |
480 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
481 | if (!zdev->online || !zdev->ops->rng) | |
482 | continue; | |
483 | zcrypt_device_get(zdev); | |
484 | get_device(&zdev->ap_dev->device); | |
485 | zdev->request_count++; | |
486 | __zcrypt_decrease_preference(zdev); | |
487 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { | |
488 | spin_unlock_bh(&zcrypt_device_lock); | |
489 | rc = zdev->ops->rng(zdev, buffer); | |
490 | spin_lock_bh(&zcrypt_device_lock); | |
491 | module_put(zdev->ap_dev->drv->driver.owner); | |
492 | } else | |
493 | rc = -EAGAIN; | |
494 | zdev->request_count--; | |
495 | __zcrypt_increase_preference(zdev); | |
496 | put_device(&zdev->ap_dev->device); | |
497 | zcrypt_device_put(zdev); | |
498 | spin_unlock_bh(&zcrypt_device_lock); | |
499 | return rc; | |
500 | } | |
501 | spin_unlock_bh(&zcrypt_device_lock); | |
502 | return -ENODEV; | |
503 | } | |
504 | ||
2dbc2418 MS |
505 | static void zcrypt_status_mask(char status[AP_DEVICES]) |
506 | { | |
507 | struct zcrypt_device *zdev; | |
508 | ||
509 | memset(status, 0, sizeof(char) * AP_DEVICES); | |
510 | spin_lock_bh(&zcrypt_device_lock); | |
511 | list_for_each_entry(zdev, &zcrypt_device_list, list) | |
512 | status[AP_QID_DEVICE(zdev->ap_dev->qid)] = | |
513 | zdev->online ? zdev->user_space_type : 0x0d; | |
514 | spin_unlock_bh(&zcrypt_device_lock); | |
515 | } | |
516 | ||
517 | static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES]) | |
518 | { | |
519 | struct zcrypt_device *zdev; | |
520 | ||
521 | memset(qdepth, 0, sizeof(char) * AP_DEVICES); | |
522 | spin_lock_bh(&zcrypt_device_lock); | |
523 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
524 | spin_lock(&zdev->ap_dev->lock); | |
525 | qdepth[AP_QID_DEVICE(zdev->ap_dev->qid)] = | |
526 | zdev->ap_dev->pendingq_count + | |
527 | zdev->ap_dev->requestq_count; | |
528 | spin_unlock(&zdev->ap_dev->lock); | |
529 | } | |
530 | spin_unlock_bh(&zcrypt_device_lock); | |
531 | } | |
532 | ||
533 | static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES]) | |
534 | { | |
535 | struct zcrypt_device *zdev; | |
536 | ||
537 | memset(reqcnt, 0, sizeof(int) * AP_DEVICES); | |
538 | spin_lock_bh(&zcrypt_device_lock); | |
539 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
540 | spin_lock(&zdev->ap_dev->lock); | |
541 | reqcnt[AP_QID_DEVICE(zdev->ap_dev->qid)] = | |
542 | zdev->ap_dev->total_request_count; | |
543 | spin_unlock(&zdev->ap_dev->lock); | |
544 | } | |
545 | spin_unlock_bh(&zcrypt_device_lock); | |
546 | } | |
547 | ||
548 | static int zcrypt_pendingq_count(void) | |
549 | { | |
550 | struct zcrypt_device *zdev; | |
551 | int pendingq_count = 0; | |
552 | ||
553 | spin_lock_bh(&zcrypt_device_lock); | |
554 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
555 | spin_lock(&zdev->ap_dev->lock); | |
556 | pendingq_count += zdev->ap_dev->pendingq_count; | |
557 | spin_unlock(&zdev->ap_dev->lock); | |
558 | } | |
559 | spin_unlock_bh(&zcrypt_device_lock); | |
560 | return pendingq_count; | |
561 | } | |
562 | ||
563 | static int zcrypt_requestq_count(void) | |
564 | { | |
565 | struct zcrypt_device *zdev; | |
566 | int requestq_count = 0; | |
567 | ||
568 | spin_lock_bh(&zcrypt_device_lock); | |
569 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
570 | spin_lock(&zdev->ap_dev->lock); | |
571 | requestq_count += zdev->ap_dev->requestq_count; | |
572 | spin_unlock(&zdev->ap_dev->lock); | |
573 | } | |
574 | spin_unlock_bh(&zcrypt_device_lock); | |
575 | return requestq_count; | |
576 | } | |
577 | ||
578 | static int zcrypt_count_type(int type) | |
579 | { | |
580 | struct zcrypt_device *zdev; | |
581 | int device_count = 0; | |
582 | ||
583 | spin_lock_bh(&zcrypt_device_lock); | |
584 | list_for_each_entry(zdev, &zcrypt_device_list, list) | |
585 | if (zdev->user_space_type == type) | |
586 | device_count++; | |
587 | spin_unlock_bh(&zcrypt_device_lock); | |
588 | return device_count; | |
589 | } | |
590 | ||
591 | /** | |
1749a81d FB |
592 | * zcrypt_ica_status(): Old, depracted combi status call. |
593 | * | |
2dbc2418 MS |
594 | * Old, deprecated combi status call. |
595 | */ | |
596 | static long zcrypt_ica_status(struct file *filp, unsigned long arg) | |
597 | { | |
598 | struct ica_z90_status *pstat; | |
599 | int ret; | |
600 | ||
601 | pstat = kzalloc(sizeof(*pstat), GFP_KERNEL); | |
602 | if (!pstat) | |
603 | return -ENOMEM; | |
604 | pstat->totalcount = zcrypt_device_count; | |
605 | pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA); | |
606 | pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC); | |
607 | pstat->requestqWaitCount = zcrypt_requestq_count(); | |
608 | pstat->pendingqWaitCount = zcrypt_pendingq_count(); | |
609 | pstat->totalOpenCount = atomic_read(&zcrypt_open_count); | |
610 | pstat->cryptoDomain = ap_domain_index; | |
611 | zcrypt_status_mask(pstat->status); | |
612 | zcrypt_qdepth_mask(pstat->qdepth); | |
613 | ret = 0; | |
614 | if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat))) | |
615 | ret = -EFAULT; | |
616 | kfree(pstat); | |
617 | return ret; | |
618 | } | |
619 | ||
620 | static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, | |
621 | unsigned long arg) | |
622 | { | |
623 | int rc; | |
624 | ||
625 | switch (cmd) { | |
626 | case ICARSAMODEXPO: { | |
627 | struct ica_rsa_modexpo __user *umex = (void __user *) arg; | |
628 | struct ica_rsa_modexpo mex; | |
629 | if (copy_from_user(&mex, umex, sizeof(mex))) | |
630 | return -EFAULT; | |
631 | do { | |
632 | rc = zcrypt_rsa_modexpo(&mex); | |
633 | } while (rc == -EAGAIN); | |
634 | if (rc) | |
635 | return rc; | |
636 | return put_user(mex.outputdatalength, &umex->outputdatalength); | |
637 | } | |
638 | case ICARSACRT: { | |
639 | struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg; | |
640 | struct ica_rsa_modexpo_crt crt; | |
641 | if (copy_from_user(&crt, ucrt, sizeof(crt))) | |
642 | return -EFAULT; | |
643 | do { | |
644 | rc = zcrypt_rsa_crt(&crt); | |
645 | } while (rc == -EAGAIN); | |
646 | if (rc) | |
647 | return rc; | |
648 | return put_user(crt.outputdatalength, &ucrt->outputdatalength); | |
649 | } | |
5432114b RW |
650 | case ZSECSENDCPRB: { |
651 | struct ica_xcRB __user *uxcRB = (void __user *) arg; | |
652 | struct ica_xcRB xcRB; | |
653 | if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB))) | |
654 | return -EFAULT; | |
655 | do { | |
656 | rc = zcrypt_send_cprb(&xcRB); | |
657 | } while (rc == -EAGAIN); | |
658 | if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB))) | |
659 | return -EFAULT; | |
660 | return rc; | |
661 | } | |
2dbc2418 MS |
662 | case Z90STAT_STATUS_MASK: { |
663 | char status[AP_DEVICES]; | |
664 | zcrypt_status_mask(status); | |
665 | if (copy_to_user((char __user *) arg, status, | |
666 | sizeof(char) * AP_DEVICES)) | |
667 | return -EFAULT; | |
668 | return 0; | |
669 | } | |
670 | case Z90STAT_QDEPTH_MASK: { | |
671 | char qdepth[AP_DEVICES]; | |
672 | zcrypt_qdepth_mask(qdepth); | |
673 | if (copy_to_user((char __user *) arg, qdepth, | |
674 | sizeof(char) * AP_DEVICES)) | |
675 | return -EFAULT; | |
676 | return 0; | |
677 | } | |
678 | case Z90STAT_PERDEV_REQCNT: { | |
679 | int reqcnt[AP_DEVICES]; | |
680 | zcrypt_perdev_reqcnt(reqcnt); | |
681 | if (copy_to_user((int __user *) arg, reqcnt, | |
682 | sizeof(int) * AP_DEVICES)) | |
683 | return -EFAULT; | |
684 | return 0; | |
685 | } | |
686 | case Z90STAT_REQUESTQ_COUNT: | |
687 | return put_user(zcrypt_requestq_count(), (int __user *) arg); | |
688 | case Z90STAT_PENDINGQ_COUNT: | |
689 | return put_user(zcrypt_pendingq_count(), (int __user *) arg); | |
690 | case Z90STAT_TOTALOPEN_COUNT: | |
691 | return put_user(atomic_read(&zcrypt_open_count), | |
692 | (int __user *) arg); | |
693 | case Z90STAT_DOMAIN_INDEX: | |
694 | return put_user(ap_domain_index, (int __user *) arg); | |
1749a81d | 695 | /* |
2dbc2418 MS |
696 | * Deprecated ioctls. Don't add another device count ioctl, |
697 | * you can count them yourself in the user space with the | |
698 | * output of the Z90STAT_STATUS_MASK ioctl. | |
699 | */ | |
700 | case ICAZ90STATUS: | |
701 | return zcrypt_ica_status(filp, arg); | |
702 | case Z90STAT_TOTALCOUNT: | |
703 | return put_user(zcrypt_device_count, (int __user *) arg); | |
704 | case Z90STAT_PCICACOUNT: | |
705 | return put_user(zcrypt_count_type(ZCRYPT_PCICA), | |
706 | (int __user *) arg); | |
707 | case Z90STAT_PCICCCOUNT: | |
708 | return put_user(zcrypt_count_type(ZCRYPT_PCICC), | |
709 | (int __user *) arg); | |
710 | case Z90STAT_PCIXCCMCL2COUNT: | |
711 | return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2), | |
712 | (int __user *) arg); | |
713 | case Z90STAT_PCIXCCMCL3COUNT: | |
714 | return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3), | |
715 | (int __user *) arg); | |
716 | case Z90STAT_PCIXCCCOUNT: | |
717 | return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) + | |
718 | zcrypt_count_type(ZCRYPT_PCIXCC_MCL3), | |
719 | (int __user *) arg); | |
720 | case Z90STAT_CEX2CCOUNT: | |
721 | return put_user(zcrypt_count_type(ZCRYPT_CEX2C), | |
722 | (int __user *) arg); | |
723 | case Z90STAT_CEX2ACOUNT: | |
724 | return put_user(zcrypt_count_type(ZCRYPT_CEX2A), | |
725 | (int __user *) arg); | |
726 | default: | |
727 | /* unknown ioctl number */ | |
728 | return -ENOIOCTLCMD; | |
729 | } | |
730 | } | |
731 | ||
732 | #ifdef CONFIG_COMPAT | |
1749a81d | 733 | /* |
2dbc2418 MS |
734 | * ioctl32 conversion routines |
735 | */ | |
736 | struct compat_ica_rsa_modexpo { | |
737 | compat_uptr_t inputdata; | |
738 | unsigned int inputdatalength; | |
739 | compat_uptr_t outputdata; | |
740 | unsigned int outputdatalength; | |
741 | compat_uptr_t b_key; | |
742 | compat_uptr_t n_modulus; | |
743 | }; | |
744 | ||
745 | static long trans_modexpo32(struct file *filp, unsigned int cmd, | |
746 | unsigned long arg) | |
747 | { | |
748 | struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg); | |
749 | struct compat_ica_rsa_modexpo mex32; | |
750 | struct ica_rsa_modexpo mex64; | |
751 | long rc; | |
752 | ||
753 | if (copy_from_user(&mex32, umex32, sizeof(mex32))) | |
754 | return -EFAULT; | |
755 | mex64.inputdata = compat_ptr(mex32.inputdata); | |
756 | mex64.inputdatalength = mex32.inputdatalength; | |
757 | mex64.outputdata = compat_ptr(mex32.outputdata); | |
758 | mex64.outputdatalength = mex32.outputdatalength; | |
759 | mex64.b_key = compat_ptr(mex32.b_key); | |
760 | mex64.n_modulus = compat_ptr(mex32.n_modulus); | |
761 | do { | |
762 | rc = zcrypt_rsa_modexpo(&mex64); | |
763 | } while (rc == -EAGAIN); | |
764 | if (!rc) | |
765 | rc = put_user(mex64.outputdatalength, | |
766 | &umex32->outputdatalength); | |
767 | return rc; | |
768 | } | |
769 | ||
770 | struct compat_ica_rsa_modexpo_crt { | |
771 | compat_uptr_t inputdata; | |
772 | unsigned int inputdatalength; | |
773 | compat_uptr_t outputdata; | |
774 | unsigned int outputdatalength; | |
775 | compat_uptr_t bp_key; | |
776 | compat_uptr_t bq_key; | |
777 | compat_uptr_t np_prime; | |
778 | compat_uptr_t nq_prime; | |
779 | compat_uptr_t u_mult_inv; | |
780 | }; | |
781 | ||
782 | static long trans_modexpo_crt32(struct file *filp, unsigned int cmd, | |
783 | unsigned long arg) | |
784 | { | |
785 | struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg); | |
786 | struct compat_ica_rsa_modexpo_crt crt32; | |
787 | struct ica_rsa_modexpo_crt crt64; | |
788 | long rc; | |
789 | ||
790 | if (copy_from_user(&crt32, ucrt32, sizeof(crt32))) | |
791 | return -EFAULT; | |
792 | crt64.inputdata = compat_ptr(crt32.inputdata); | |
793 | crt64.inputdatalength = crt32.inputdatalength; | |
794 | crt64.outputdata= compat_ptr(crt32.outputdata); | |
795 | crt64.outputdatalength = crt32.outputdatalength; | |
796 | crt64.bp_key = compat_ptr(crt32.bp_key); | |
797 | crt64.bq_key = compat_ptr(crt32.bq_key); | |
798 | crt64.np_prime = compat_ptr(crt32.np_prime); | |
799 | crt64.nq_prime = compat_ptr(crt32.nq_prime); | |
800 | crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv); | |
801 | do { | |
802 | rc = zcrypt_rsa_crt(&crt64); | |
803 | } while (rc == -EAGAIN); | |
804 | if (!rc) | |
805 | rc = put_user(crt64.outputdatalength, | |
806 | &ucrt32->outputdatalength); | |
807 | return rc; | |
808 | } | |
809 | ||
5432114b RW |
810 | struct compat_ica_xcRB { |
811 | unsigned short agent_ID; | |
812 | unsigned int user_defined; | |
813 | unsigned short request_ID; | |
814 | unsigned int request_control_blk_length; | |
815 | unsigned char padding1[16 - sizeof (compat_uptr_t)]; | |
816 | compat_uptr_t request_control_blk_addr; | |
817 | unsigned int request_data_length; | |
818 | char padding2[16 - sizeof (compat_uptr_t)]; | |
819 | compat_uptr_t request_data_address; | |
820 | unsigned int reply_control_blk_length; | |
821 | char padding3[16 - sizeof (compat_uptr_t)]; | |
822 | compat_uptr_t reply_control_blk_addr; | |
823 | unsigned int reply_data_length; | |
824 | char padding4[16 - sizeof (compat_uptr_t)]; | |
825 | compat_uptr_t reply_data_addr; | |
826 | unsigned short priority_window; | |
827 | unsigned int status; | |
828 | } __attribute__((packed)); | |
829 | ||
830 | static long trans_xcRB32(struct file *filp, unsigned int cmd, | |
831 | unsigned long arg) | |
832 | { | |
833 | struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg); | |
834 | struct compat_ica_xcRB xcRB32; | |
835 | struct ica_xcRB xcRB64; | |
836 | long rc; | |
837 | ||
838 | if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32))) | |
839 | return -EFAULT; | |
840 | xcRB64.agent_ID = xcRB32.agent_ID; | |
841 | xcRB64.user_defined = xcRB32.user_defined; | |
842 | xcRB64.request_ID = xcRB32.request_ID; | |
843 | xcRB64.request_control_blk_length = | |
844 | xcRB32.request_control_blk_length; | |
845 | xcRB64.request_control_blk_addr = | |
846 | compat_ptr(xcRB32.request_control_blk_addr); | |
847 | xcRB64.request_data_length = | |
848 | xcRB32.request_data_length; | |
849 | xcRB64.request_data_address = | |
850 | compat_ptr(xcRB32.request_data_address); | |
851 | xcRB64.reply_control_blk_length = | |
852 | xcRB32.reply_control_blk_length; | |
853 | xcRB64.reply_control_blk_addr = | |
854 | compat_ptr(xcRB32.reply_control_blk_addr); | |
855 | xcRB64.reply_data_length = xcRB32.reply_data_length; | |
856 | xcRB64.reply_data_addr = | |
857 | compat_ptr(xcRB32.reply_data_addr); | |
858 | xcRB64.priority_window = xcRB32.priority_window; | |
859 | xcRB64.status = xcRB32.status; | |
860 | do { | |
861 | rc = zcrypt_send_cprb(&xcRB64); | |
862 | } while (rc == -EAGAIN); | |
863 | xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length; | |
864 | xcRB32.reply_data_length = xcRB64.reply_data_length; | |
865 | xcRB32.status = xcRB64.status; | |
866 | if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32))) | |
867 | return -EFAULT; | |
868 | return rc; | |
869 | } | |
870 | ||
2b67fc46 | 871 | static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd, |
2dbc2418 MS |
872 | unsigned long arg) |
873 | { | |
874 | if (cmd == ICARSAMODEXPO) | |
875 | return trans_modexpo32(filp, cmd, arg); | |
876 | if (cmd == ICARSACRT) | |
877 | return trans_modexpo_crt32(filp, cmd, arg); | |
5432114b RW |
878 | if (cmd == ZSECSENDCPRB) |
879 | return trans_xcRB32(filp, cmd, arg); | |
2dbc2418 MS |
880 | return zcrypt_unlocked_ioctl(filp, cmd, arg); |
881 | } | |
882 | #endif | |
883 | ||
1749a81d | 884 | /* |
2dbc2418 MS |
885 | * Misc device file operations. |
886 | */ | |
d54b1fdb | 887 | static const struct file_operations zcrypt_fops = { |
2dbc2418 MS |
888 | .owner = THIS_MODULE, |
889 | .read = zcrypt_read, | |
890 | .write = zcrypt_write, | |
891 | .unlocked_ioctl = zcrypt_unlocked_ioctl, | |
892 | #ifdef CONFIG_COMPAT | |
893 | .compat_ioctl = zcrypt_compat_ioctl, | |
894 | #endif | |
895 | .open = zcrypt_open, | |
896 | .release = zcrypt_release | |
897 | }; | |
898 | ||
1749a81d | 899 | /* |
2dbc2418 MS |
900 | * Misc device. |
901 | */ | |
902 | static struct miscdevice zcrypt_misc_device = { | |
903 | .minor = MISC_DYNAMIC_MINOR, | |
904 | .name = "z90crypt", | |
905 | .fops = &zcrypt_fops, | |
906 | }; | |
907 | ||
1749a81d | 908 | /* |
2dbc2418 MS |
909 | * Deprecated /proc entry support. |
910 | */ | |
911 | static struct proc_dir_entry *zcrypt_entry; | |
912 | ||
4d284cac HC |
913 | static int sprintcl(unsigned char *outaddr, unsigned char *addr, |
914 | unsigned int len) | |
2dbc2418 MS |
915 | { |
916 | int hl, i; | |
917 | ||
918 | hl = 0; | |
919 | for (i = 0; i < len; i++) | |
920 | hl += sprintf(outaddr+hl, "%01x", (unsigned int) addr[i]); | |
921 | hl += sprintf(outaddr+hl, " "); | |
922 | return hl; | |
923 | } | |
924 | ||
4d284cac HC |
925 | static int sprintrw(unsigned char *outaddr, unsigned char *addr, |
926 | unsigned int len) | |
2dbc2418 MS |
927 | { |
928 | int hl, inl, c, cx; | |
929 | ||
930 | hl = sprintf(outaddr, " "); | |
931 | inl = 0; | |
932 | for (c = 0; c < (len / 16); c++) { | |
933 | hl += sprintcl(outaddr+hl, addr+inl, 16); | |
934 | inl += 16; | |
935 | } | |
936 | cx = len%16; | |
937 | if (cx) { | |
938 | hl += sprintcl(outaddr+hl, addr+inl, cx); | |
939 | inl += cx; | |
940 | } | |
941 | hl += sprintf(outaddr+hl, "\n"); | |
942 | return hl; | |
943 | } | |
944 | ||
4d284cac HC |
945 | static int sprinthx(unsigned char *title, unsigned char *outaddr, |
946 | unsigned char *addr, unsigned int len) | |
2dbc2418 MS |
947 | { |
948 | int hl, inl, r, rx; | |
949 | ||
950 | hl = sprintf(outaddr, "\n%s\n", title); | |
951 | inl = 0; | |
952 | for (r = 0; r < (len / 64); r++) { | |
953 | hl += sprintrw(outaddr+hl, addr+inl, 64); | |
954 | inl += 64; | |
955 | } | |
956 | rx = len % 64; | |
957 | if (rx) { | |
958 | hl += sprintrw(outaddr+hl, addr+inl, rx); | |
959 | inl += rx; | |
960 | } | |
961 | hl += sprintf(outaddr+hl, "\n"); | |
962 | return hl; | |
963 | } | |
964 | ||
4d284cac HC |
965 | static int sprinthx4(unsigned char *title, unsigned char *outaddr, |
966 | unsigned int *array, unsigned int len) | |
2dbc2418 MS |
967 | { |
968 | int hl, r; | |
969 | ||
970 | hl = sprintf(outaddr, "\n%s\n", title); | |
971 | for (r = 0; r < len; r++) { | |
972 | if ((r % 8) == 0) | |
973 | hl += sprintf(outaddr+hl, " "); | |
974 | hl += sprintf(outaddr+hl, "%08X ", array[r]); | |
975 | if ((r % 8) == 7) | |
976 | hl += sprintf(outaddr+hl, "\n"); | |
977 | } | |
978 | hl += sprintf(outaddr+hl, "\n"); | |
979 | return hl; | |
980 | } | |
981 | ||
982 | static int zcrypt_status_read(char *resp_buff, char **start, off_t offset, | |
983 | int count, int *eof, void *data) | |
984 | { | |
985 | unsigned char *workarea; | |
986 | int len; | |
987 | ||
988 | len = 0; | |
989 | ||
990 | /* resp_buff is a page. Use the right half for a work area */ | |
991 | workarea = resp_buff + 2000; | |
992 | len += sprintf(resp_buff + len, "\nzcrypt version: %d.%d.%d\n", | |
993 | ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT); | |
994 | len += sprintf(resp_buff + len, "Cryptographic domain: %d\n", | |
995 | ap_domain_index); | |
996 | len += sprintf(resp_buff + len, "Total device count: %d\n", | |
997 | zcrypt_device_count); | |
998 | len += sprintf(resp_buff + len, "PCICA count: %d\n", | |
999 | zcrypt_count_type(ZCRYPT_PCICA)); | |
1000 | len += sprintf(resp_buff + len, "PCICC count: %d\n", | |
1001 | zcrypt_count_type(ZCRYPT_PCICC)); | |
1002 | len += sprintf(resp_buff + len, "PCIXCC MCL2 count: %d\n", | |
1003 | zcrypt_count_type(ZCRYPT_PCIXCC_MCL2)); | |
1004 | len += sprintf(resp_buff + len, "PCIXCC MCL3 count: %d\n", | |
1005 | zcrypt_count_type(ZCRYPT_PCIXCC_MCL3)); | |
1006 | len += sprintf(resp_buff + len, "CEX2C count: %d\n", | |
1007 | zcrypt_count_type(ZCRYPT_CEX2C)); | |
1008 | len += sprintf(resp_buff + len, "CEX2A count: %d\n", | |
1009 | zcrypt_count_type(ZCRYPT_CEX2A)); | |
ffda4f71 FB |
1010 | len += sprintf(resp_buff + len, "CEX3C count: %d\n", |
1011 | zcrypt_count_type(ZCRYPT_CEX3C)); | |
1012 | len += sprintf(resp_buff + len, "CEX3A count: %d\n", | |
1013 | zcrypt_count_type(ZCRYPT_CEX3A)); | |
2dbc2418 MS |
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) " | |
ffda4f71 | 1022 | "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A", |
2dbc2418 MS |
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' | |
ffda4f71 | 1100 | * '7' for CEX3C and '8' for CEX3A |
2dbc2418 | 1101 | */ |
ffda4f71 | 1102 | if (*ptr >= '0' && *ptr <= '8') |
2dbc2418 MS |
1103 | j++; |
1104 | else if (*ptr == 'd' || *ptr == 'D') | |
1105 | zcrypt_disable_card(j++); | |
1106 | else if (*ptr == 'e' || *ptr == 'E') | |
1107 | zcrypt_enable_card(j++); | |
1108 | else if (*ptr != ' ' && *ptr != '\t') | |
1109 | break; | |
1110 | } | |
1111 | out: | |
1112 | kfree(lbuf); | |
1113 | return count; | |
1114 | } | |
1115 | ||
2f7c8bd6 RW |
1116 | static int zcrypt_rng_device_count; |
1117 | static u32 *zcrypt_rng_buffer; | |
1118 | static int zcrypt_rng_buffer_index; | |
1119 | static DEFINE_MUTEX(zcrypt_rng_mutex); | |
1120 | ||
1121 | static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data) | |
1122 | { | |
1123 | int rc; | |
1124 | ||
1749a81d | 1125 | /* |
2f7c8bd6 RW |
1126 | * We don't need locking here because the RNG API guarantees serialized |
1127 | * read method calls. | |
1128 | */ | |
1129 | if (zcrypt_rng_buffer_index == 0) { | |
1130 | rc = zcrypt_rng((char *) zcrypt_rng_buffer); | |
1131 | if (rc < 0) | |
1132 | return -EIO; | |
1133 | zcrypt_rng_buffer_index = rc / sizeof *data; | |
1134 | } | |
1135 | *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index]; | |
1136 | return sizeof *data; | |
1137 | } | |
1138 | ||
1139 | static struct hwrng zcrypt_rng_dev = { | |
1140 | .name = "zcrypt", | |
1141 | .data_read = zcrypt_rng_data_read, | |
1142 | }; | |
1143 | ||
1144 | static int zcrypt_rng_device_add(void) | |
1145 | { | |
1146 | int rc = 0; | |
1147 | ||
1148 | mutex_lock(&zcrypt_rng_mutex); | |
1149 | if (zcrypt_rng_device_count == 0) { | |
1150 | zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL); | |
1151 | if (!zcrypt_rng_buffer) { | |
1152 | rc = -ENOMEM; | |
1153 | goto out; | |
1154 | } | |
1155 | zcrypt_rng_buffer_index = 0; | |
1156 | rc = hwrng_register(&zcrypt_rng_dev); | |
1157 | if (rc) | |
1158 | goto out_free; | |
1159 | zcrypt_rng_device_count = 1; | |
1160 | } else | |
1161 | zcrypt_rng_device_count++; | |
1162 | mutex_unlock(&zcrypt_rng_mutex); | |
1163 | return 0; | |
1164 | ||
1165 | out_free: | |
1166 | free_page((unsigned long) zcrypt_rng_buffer); | |
1167 | out: | |
1168 | mutex_unlock(&zcrypt_rng_mutex); | |
1169 | return rc; | |
1170 | } | |
1171 | ||
1172 | static void zcrypt_rng_device_remove(void) | |
1173 | { | |
1174 | mutex_lock(&zcrypt_rng_mutex); | |
1175 | zcrypt_rng_device_count--; | |
1176 | if (zcrypt_rng_device_count == 0) { | |
1177 | hwrng_unregister(&zcrypt_rng_dev); | |
1178 | free_page((unsigned long) zcrypt_rng_buffer); | |
1179 | } | |
1180 | mutex_unlock(&zcrypt_rng_mutex); | |
1181 | } | |
1182 | ||
2dbc2418 | 1183 | /** |
1749a81d FB |
1184 | * zcrypt_api_init(): Module initialization. |
1185 | * | |
2dbc2418 MS |
1186 | * The module initialization code. |
1187 | */ | |
1188 | int __init zcrypt_api_init(void) | |
1189 | { | |
1190 | int rc; | |
1191 | ||
1192 | /* Register the request sprayer. */ | |
1193 | rc = misc_register(&zcrypt_misc_device); | |
1a89dd8f | 1194 | if (rc < 0) |
2dbc2418 | 1195 | goto out; |
2dbc2418 MS |
1196 | |
1197 | /* Set up the proc file system */ | |
1198 | zcrypt_entry = create_proc_entry("driver/z90crypt", 0644, NULL); | |
1199 | if (!zcrypt_entry) { | |
2dbc2418 MS |
1200 | rc = -ENOMEM; |
1201 | goto out_misc; | |
1202 | } | |
2dbc2418 MS |
1203 | zcrypt_entry->data = NULL; |
1204 | zcrypt_entry->read_proc = zcrypt_status_read; | |
1205 | zcrypt_entry->write_proc = zcrypt_status_write; | |
1206 | ||
1207 | return 0; | |
1208 | ||
1209 | out_misc: | |
1210 | misc_deregister(&zcrypt_misc_device); | |
1211 | out: | |
1212 | return rc; | |
1213 | } | |
1214 | ||
1215 | /** | |
1749a81d FB |
1216 | * zcrypt_api_exit(): Module termination. |
1217 | * | |
2dbc2418 MS |
1218 | * The module termination code. |
1219 | */ | |
1220 | void zcrypt_api_exit(void) | |
1221 | { | |
1222 | remove_proc_entry("driver/z90crypt", NULL); | |
1223 | misc_deregister(&zcrypt_misc_device); | |
1224 | } | |
1225 | ||
1226 | #ifndef CONFIG_ZCRYPT_MONOLITHIC | |
1227 | module_init(zcrypt_api_init); | |
1228 | module_exit(zcrypt_api_exit); | |
1229 | #endif |