Commit | Line | Data |
---|---|---|
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> | |
34b9243a | 36 | #include <linux/seq_file.h> |
2dbc2418 | 37 | #include <linux/compat.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
2dbc2418 MS |
39 | #include <asm/atomic.h> |
40 | #include <asm/uaccess.h> | |
2f7c8bd6 | 41 | #include <linux/hw_random.h> |
2dbc2418 MS |
42 | |
43 | #include "zcrypt_api.h" | |
44 | ||
1749a81d | 45 | /* |
2dbc2418 MS |
46 | * Module description. |
47 | */ | |
48 | MODULE_AUTHOR("IBM Corporation"); | |
49 | MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " | |
50 | "Copyright 2001, 2006 IBM Corporation"); | |
51 | MODULE_LICENSE("GPL"); | |
52 | ||
53 | static DEFINE_SPINLOCK(zcrypt_device_lock); | |
54 | static LIST_HEAD(zcrypt_device_list); | |
55 | static int zcrypt_device_count = 0; | |
56 | static atomic_t zcrypt_open_count = ATOMIC_INIT(0); | |
57 | ||
2f7c8bd6 RW |
58 | static int zcrypt_rng_device_add(void); |
59 | static void zcrypt_rng_device_remove(void); | |
60 | ||
1749a81d | 61 | /* |
2dbc2418 MS |
62 | * Device attributes common for all crypto devices. |
63 | */ | |
64 | static ssize_t zcrypt_type_show(struct device *dev, | |
65 | struct device_attribute *attr, char *buf) | |
66 | { | |
67 | struct zcrypt_device *zdev = to_ap_dev(dev)->private; | |
68 | return snprintf(buf, PAGE_SIZE, "%s\n", zdev->type_string); | |
69 | } | |
70 | ||
71 | static DEVICE_ATTR(type, 0444, zcrypt_type_show, NULL); | |
72 | ||
73 | static ssize_t zcrypt_online_show(struct device *dev, | |
74 | struct device_attribute *attr, char *buf) | |
75 | { | |
76 | struct zcrypt_device *zdev = to_ap_dev(dev)->private; | |
77 | return snprintf(buf, PAGE_SIZE, "%d\n", zdev->online); | |
78 | } | |
79 | ||
80 | static ssize_t zcrypt_online_store(struct device *dev, | |
81 | struct device_attribute *attr, | |
82 | const char *buf, size_t count) | |
83 | { | |
84 | struct zcrypt_device *zdev = to_ap_dev(dev)->private; | |
85 | int online; | |
86 | ||
87 | if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1) | |
88 | return -EINVAL; | |
89 | zdev->online = online; | |
90 | if (!online) | |
91 | ap_flush_queue(zdev->ap_dev); | |
92 | return count; | |
93 | } | |
94 | ||
95 | static DEVICE_ATTR(online, 0644, zcrypt_online_show, zcrypt_online_store); | |
96 | ||
97 | static struct attribute * zcrypt_device_attrs[] = { | |
98 | &dev_attr_type.attr, | |
99 | &dev_attr_online.attr, | |
100 | NULL, | |
101 | }; | |
102 | ||
103 | static struct attribute_group zcrypt_device_attr_group = { | |
104 | .attrs = zcrypt_device_attrs, | |
105 | }; | |
106 | ||
107 | /** | |
1749a81d FB |
108 | * __zcrypt_increase_preference(): Increase preference of a crypto device. |
109 | * @zdev: Pointer the crypto device | |
110 | * | |
2dbc2418 MS |
111 | * Move the device towards the head of the device list. |
112 | * Need to be called while holding the zcrypt device list lock. | |
113 | * Note: cards with speed_rating of 0 are kept at the end of the list. | |
114 | */ | |
115 | static void __zcrypt_increase_preference(struct zcrypt_device *zdev) | |
116 | { | |
117 | struct zcrypt_device *tmp; | |
118 | struct list_head *l; | |
119 | ||
120 | if (zdev->speed_rating == 0) | |
121 | return; | |
122 | for (l = zdev->list.prev; l != &zcrypt_device_list; l = l->prev) { | |
123 | tmp = list_entry(l, struct zcrypt_device, list); | |
124 | if ((tmp->request_count + 1) * tmp->speed_rating <= | |
125 | (zdev->request_count + 1) * zdev->speed_rating && | |
126 | tmp->speed_rating != 0) | |
127 | break; | |
128 | } | |
129 | if (l == zdev->list.prev) | |
130 | return; | |
131 | /* Move zdev behind l */ | |
1fbc9f46 | 132 | list_move(&zdev->list, l); |
2dbc2418 MS |
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 */ | |
1fbc9f46 | 160 | list_move_tail(&zdev->list, l); |
2dbc2418 MS |
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); | |
58ea91c0 | 304 | return nonseekable_open(inode, filp); |
2dbc2418 MS |
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) { | |
0648f565 | 397 | unsigned int len; |
2dbc2418 MS |
398 | spin_unlock_bh(&zcrypt_device_lock); |
399 | /* len is max 256 / 2 - 120 = 8 */ | |
400 | len = crt->inputdatalength / 2 - 120; | |
0648f565 HC |
401 | if (len > sizeof(z1)) |
402 | return -EFAULT; | |
2dbc2418 MS |
403 | z1 = z2 = z3 = 0; |
404 | if (copy_from_user(&z1, crt->np_prime, len) || | |
405 | copy_from_user(&z2, crt->bp_key, len) || | |
406 | copy_from_user(&z3, crt->u_mult_inv, len)) | |
407 | return -EFAULT; | |
408 | copied = 1; | |
1749a81d | 409 | /* |
2dbc2418 MS |
410 | * We have to restart device lookup - |
411 | * the device list may have changed by now. | |
412 | */ | |
413 | goto restart; | |
414 | } | |
415 | if (z1 != 0ULL || z2 != 0ULL || z3 != 0ULL) | |
416 | /* The device can't handle this request. */ | |
417 | continue; | |
418 | } | |
419 | zcrypt_device_get(zdev); | |
420 | get_device(&zdev->ap_dev->device); | |
421 | zdev->request_count++; | |
422 | __zcrypt_decrease_preference(zdev); | |
2dbc2418 | 423 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
43a867a2 | 424 | spin_unlock_bh(&zcrypt_device_lock); |
2dbc2418 | 425 | rc = zdev->ops->rsa_modexpo_crt(zdev, crt); |
43a867a2 | 426 | spin_lock_bh(&zcrypt_device_lock); |
2dbc2418 MS |
427 | module_put(zdev->ap_dev->drv->driver.owner); |
428 | } | |
429 | else | |
430 | rc = -EAGAIN; | |
2dbc2418 MS |
431 | zdev->request_count--; |
432 | __zcrypt_increase_preference(zdev); | |
433 | put_device(&zdev->ap_dev->device); | |
434 | zcrypt_device_put(zdev); | |
435 | spin_unlock_bh(&zcrypt_device_lock); | |
436 | return rc; | |
437 | } | |
438 | spin_unlock_bh(&zcrypt_device_lock); | |
439 | return -ENODEV; | |
440 | } | |
441 | ||
5432114b RW |
442 | static long zcrypt_send_cprb(struct ica_xcRB *xcRB) |
443 | { | |
444 | struct zcrypt_device *zdev; | |
445 | int rc; | |
446 | ||
447 | spin_lock_bh(&zcrypt_device_lock); | |
448 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
449 | if (!zdev->online || !zdev->ops->send_cprb || | |
450 | (xcRB->user_defined != AUTOSELECT && | |
451 | AP_QID_DEVICE(zdev->ap_dev->qid) != xcRB->user_defined) | |
452 | ) | |
453 | continue; | |
454 | zcrypt_device_get(zdev); | |
455 | get_device(&zdev->ap_dev->device); | |
456 | zdev->request_count++; | |
457 | __zcrypt_decrease_preference(zdev); | |
5432114b | 458 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { |
43a867a2 | 459 | spin_unlock_bh(&zcrypt_device_lock); |
5432114b | 460 | rc = zdev->ops->send_cprb(zdev, xcRB); |
43a867a2 | 461 | spin_lock_bh(&zcrypt_device_lock); |
5432114b RW |
462 | module_put(zdev->ap_dev->drv->driver.owner); |
463 | } | |
464 | else | |
465 | rc = -EAGAIN; | |
5432114b RW |
466 | zdev->request_count--; |
467 | __zcrypt_increase_preference(zdev); | |
468 | put_device(&zdev->ap_dev->device); | |
469 | zcrypt_device_put(zdev); | |
470 | spin_unlock_bh(&zcrypt_device_lock); | |
471 | return rc; | |
472 | } | |
473 | spin_unlock_bh(&zcrypt_device_lock); | |
474 | return -ENODEV; | |
475 | } | |
476 | ||
2f7c8bd6 RW |
477 | static long zcrypt_rng(char *buffer) |
478 | { | |
479 | struct zcrypt_device *zdev; | |
480 | int rc; | |
481 | ||
482 | spin_lock_bh(&zcrypt_device_lock); | |
483 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
484 | if (!zdev->online || !zdev->ops->rng) | |
485 | continue; | |
486 | zcrypt_device_get(zdev); | |
487 | get_device(&zdev->ap_dev->device); | |
488 | zdev->request_count++; | |
489 | __zcrypt_decrease_preference(zdev); | |
490 | if (try_module_get(zdev->ap_dev->drv->driver.owner)) { | |
491 | spin_unlock_bh(&zcrypt_device_lock); | |
492 | rc = zdev->ops->rng(zdev, buffer); | |
493 | spin_lock_bh(&zcrypt_device_lock); | |
494 | module_put(zdev->ap_dev->drv->driver.owner); | |
495 | } else | |
496 | rc = -EAGAIN; | |
497 | zdev->request_count--; | |
498 | __zcrypt_increase_preference(zdev); | |
499 | put_device(&zdev->ap_dev->device); | |
500 | zcrypt_device_put(zdev); | |
501 | spin_unlock_bh(&zcrypt_device_lock); | |
502 | return rc; | |
503 | } | |
504 | spin_unlock_bh(&zcrypt_device_lock); | |
505 | return -ENODEV; | |
506 | } | |
507 | ||
2dbc2418 MS |
508 | static void zcrypt_status_mask(char status[AP_DEVICES]) |
509 | { | |
510 | struct zcrypt_device *zdev; | |
511 | ||
512 | memset(status, 0, sizeof(char) * AP_DEVICES); | |
513 | spin_lock_bh(&zcrypt_device_lock); | |
514 | list_for_each_entry(zdev, &zcrypt_device_list, list) | |
515 | status[AP_QID_DEVICE(zdev->ap_dev->qid)] = | |
516 | zdev->online ? zdev->user_space_type : 0x0d; | |
517 | spin_unlock_bh(&zcrypt_device_lock); | |
518 | } | |
519 | ||
520 | static void zcrypt_qdepth_mask(char qdepth[AP_DEVICES]) | |
521 | { | |
522 | struct zcrypt_device *zdev; | |
523 | ||
524 | memset(qdepth, 0, sizeof(char) * AP_DEVICES); | |
525 | spin_lock_bh(&zcrypt_device_lock); | |
526 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
527 | spin_lock(&zdev->ap_dev->lock); | |
528 | qdepth[AP_QID_DEVICE(zdev->ap_dev->qid)] = | |
529 | zdev->ap_dev->pendingq_count + | |
530 | zdev->ap_dev->requestq_count; | |
531 | spin_unlock(&zdev->ap_dev->lock); | |
532 | } | |
533 | spin_unlock_bh(&zcrypt_device_lock); | |
534 | } | |
535 | ||
536 | static void zcrypt_perdev_reqcnt(int reqcnt[AP_DEVICES]) | |
537 | { | |
538 | struct zcrypt_device *zdev; | |
539 | ||
540 | memset(reqcnt, 0, sizeof(int) * AP_DEVICES); | |
541 | spin_lock_bh(&zcrypt_device_lock); | |
542 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
543 | spin_lock(&zdev->ap_dev->lock); | |
544 | reqcnt[AP_QID_DEVICE(zdev->ap_dev->qid)] = | |
545 | zdev->ap_dev->total_request_count; | |
546 | spin_unlock(&zdev->ap_dev->lock); | |
547 | } | |
548 | spin_unlock_bh(&zcrypt_device_lock); | |
549 | } | |
550 | ||
551 | static int zcrypt_pendingq_count(void) | |
552 | { | |
553 | struct zcrypt_device *zdev; | |
554 | int pendingq_count = 0; | |
555 | ||
556 | spin_lock_bh(&zcrypt_device_lock); | |
557 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
558 | spin_lock(&zdev->ap_dev->lock); | |
559 | pendingq_count += zdev->ap_dev->pendingq_count; | |
560 | spin_unlock(&zdev->ap_dev->lock); | |
561 | } | |
562 | spin_unlock_bh(&zcrypt_device_lock); | |
563 | return pendingq_count; | |
564 | } | |
565 | ||
566 | static int zcrypt_requestq_count(void) | |
567 | { | |
568 | struct zcrypt_device *zdev; | |
569 | int requestq_count = 0; | |
570 | ||
571 | spin_lock_bh(&zcrypt_device_lock); | |
572 | list_for_each_entry(zdev, &zcrypt_device_list, list) { | |
573 | spin_lock(&zdev->ap_dev->lock); | |
574 | requestq_count += zdev->ap_dev->requestq_count; | |
575 | spin_unlock(&zdev->ap_dev->lock); | |
576 | } | |
577 | spin_unlock_bh(&zcrypt_device_lock); | |
578 | return requestq_count; | |
579 | } | |
580 | ||
581 | static int zcrypt_count_type(int type) | |
582 | { | |
583 | struct zcrypt_device *zdev; | |
584 | int device_count = 0; | |
585 | ||
586 | spin_lock_bh(&zcrypt_device_lock); | |
587 | list_for_each_entry(zdev, &zcrypt_device_list, list) | |
588 | if (zdev->user_space_type == type) | |
589 | device_count++; | |
590 | spin_unlock_bh(&zcrypt_device_lock); | |
591 | return device_count; | |
592 | } | |
593 | ||
594 | /** | |
1749a81d FB |
595 | * zcrypt_ica_status(): Old, depracted combi status call. |
596 | * | |
2dbc2418 MS |
597 | * Old, deprecated combi status call. |
598 | */ | |
599 | static long zcrypt_ica_status(struct file *filp, unsigned long arg) | |
600 | { | |
601 | struct ica_z90_status *pstat; | |
602 | int ret; | |
603 | ||
604 | pstat = kzalloc(sizeof(*pstat), GFP_KERNEL); | |
605 | if (!pstat) | |
606 | return -ENOMEM; | |
607 | pstat->totalcount = zcrypt_device_count; | |
608 | pstat->leedslitecount = zcrypt_count_type(ZCRYPT_PCICA); | |
609 | pstat->leeds2count = zcrypt_count_type(ZCRYPT_PCICC); | |
610 | pstat->requestqWaitCount = zcrypt_requestq_count(); | |
611 | pstat->pendingqWaitCount = zcrypt_pendingq_count(); | |
612 | pstat->totalOpenCount = atomic_read(&zcrypt_open_count); | |
613 | pstat->cryptoDomain = ap_domain_index; | |
614 | zcrypt_status_mask(pstat->status); | |
615 | zcrypt_qdepth_mask(pstat->qdepth); | |
616 | ret = 0; | |
617 | if (copy_to_user((void __user *) arg, pstat, sizeof(*pstat))) | |
618 | ret = -EFAULT; | |
619 | kfree(pstat); | |
620 | return ret; | |
621 | } | |
622 | ||
623 | static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, | |
624 | unsigned long arg) | |
625 | { | |
626 | int rc; | |
627 | ||
628 | switch (cmd) { | |
629 | case ICARSAMODEXPO: { | |
630 | struct ica_rsa_modexpo __user *umex = (void __user *) arg; | |
631 | struct ica_rsa_modexpo mex; | |
632 | if (copy_from_user(&mex, umex, sizeof(mex))) | |
633 | return -EFAULT; | |
634 | do { | |
635 | rc = zcrypt_rsa_modexpo(&mex); | |
636 | } while (rc == -EAGAIN); | |
637 | if (rc) | |
638 | return rc; | |
639 | return put_user(mex.outputdatalength, &umex->outputdatalength); | |
640 | } | |
641 | case ICARSACRT: { | |
642 | struct ica_rsa_modexpo_crt __user *ucrt = (void __user *) arg; | |
643 | struct ica_rsa_modexpo_crt crt; | |
644 | if (copy_from_user(&crt, ucrt, sizeof(crt))) | |
645 | return -EFAULT; | |
646 | do { | |
647 | rc = zcrypt_rsa_crt(&crt); | |
648 | } while (rc == -EAGAIN); | |
649 | if (rc) | |
650 | return rc; | |
651 | return put_user(crt.outputdatalength, &ucrt->outputdatalength); | |
652 | } | |
5432114b RW |
653 | case ZSECSENDCPRB: { |
654 | struct ica_xcRB __user *uxcRB = (void __user *) arg; | |
655 | struct ica_xcRB xcRB; | |
656 | if (copy_from_user(&xcRB, uxcRB, sizeof(xcRB))) | |
657 | return -EFAULT; | |
658 | do { | |
659 | rc = zcrypt_send_cprb(&xcRB); | |
660 | } while (rc == -EAGAIN); | |
661 | if (copy_to_user(uxcRB, &xcRB, sizeof(xcRB))) | |
662 | return -EFAULT; | |
663 | return rc; | |
664 | } | |
2dbc2418 MS |
665 | case Z90STAT_STATUS_MASK: { |
666 | char status[AP_DEVICES]; | |
667 | zcrypt_status_mask(status); | |
668 | if (copy_to_user((char __user *) arg, status, | |
669 | sizeof(char) * AP_DEVICES)) | |
670 | return -EFAULT; | |
671 | return 0; | |
672 | } | |
673 | case Z90STAT_QDEPTH_MASK: { | |
674 | char qdepth[AP_DEVICES]; | |
675 | zcrypt_qdepth_mask(qdepth); | |
676 | if (copy_to_user((char __user *) arg, qdepth, | |
677 | sizeof(char) * AP_DEVICES)) | |
678 | return -EFAULT; | |
679 | return 0; | |
680 | } | |
681 | case Z90STAT_PERDEV_REQCNT: { | |
682 | int reqcnt[AP_DEVICES]; | |
683 | zcrypt_perdev_reqcnt(reqcnt); | |
684 | if (copy_to_user((int __user *) arg, reqcnt, | |
685 | sizeof(int) * AP_DEVICES)) | |
686 | return -EFAULT; | |
687 | return 0; | |
688 | } | |
689 | case Z90STAT_REQUESTQ_COUNT: | |
690 | return put_user(zcrypt_requestq_count(), (int __user *) arg); | |
691 | case Z90STAT_PENDINGQ_COUNT: | |
692 | return put_user(zcrypt_pendingq_count(), (int __user *) arg); | |
693 | case Z90STAT_TOTALOPEN_COUNT: | |
694 | return put_user(atomic_read(&zcrypt_open_count), | |
695 | (int __user *) arg); | |
696 | case Z90STAT_DOMAIN_INDEX: | |
697 | return put_user(ap_domain_index, (int __user *) arg); | |
1749a81d | 698 | /* |
2dbc2418 MS |
699 | * Deprecated ioctls. Don't add another device count ioctl, |
700 | * you can count them yourself in the user space with the | |
701 | * output of the Z90STAT_STATUS_MASK ioctl. | |
702 | */ | |
703 | case ICAZ90STATUS: | |
704 | return zcrypt_ica_status(filp, arg); | |
705 | case Z90STAT_TOTALCOUNT: | |
706 | return put_user(zcrypt_device_count, (int __user *) arg); | |
707 | case Z90STAT_PCICACOUNT: | |
708 | return put_user(zcrypt_count_type(ZCRYPT_PCICA), | |
709 | (int __user *) arg); | |
710 | case Z90STAT_PCICCCOUNT: | |
711 | return put_user(zcrypt_count_type(ZCRYPT_PCICC), | |
712 | (int __user *) arg); | |
713 | case Z90STAT_PCIXCCMCL2COUNT: | |
714 | return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2), | |
715 | (int __user *) arg); | |
716 | case Z90STAT_PCIXCCMCL3COUNT: | |
717 | return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL3), | |
718 | (int __user *) arg); | |
719 | case Z90STAT_PCIXCCCOUNT: | |
720 | return put_user(zcrypt_count_type(ZCRYPT_PCIXCC_MCL2) + | |
721 | zcrypt_count_type(ZCRYPT_PCIXCC_MCL3), | |
722 | (int __user *) arg); | |
723 | case Z90STAT_CEX2CCOUNT: | |
724 | return put_user(zcrypt_count_type(ZCRYPT_CEX2C), | |
725 | (int __user *) arg); | |
726 | case Z90STAT_CEX2ACOUNT: | |
727 | return put_user(zcrypt_count_type(ZCRYPT_CEX2A), | |
728 | (int __user *) arg); | |
729 | default: | |
730 | /* unknown ioctl number */ | |
731 | return -ENOIOCTLCMD; | |
732 | } | |
733 | } | |
734 | ||
735 | #ifdef CONFIG_COMPAT | |
1749a81d | 736 | /* |
2dbc2418 MS |
737 | * ioctl32 conversion routines |
738 | */ | |
739 | struct compat_ica_rsa_modexpo { | |
740 | compat_uptr_t inputdata; | |
741 | unsigned int inputdatalength; | |
742 | compat_uptr_t outputdata; | |
743 | unsigned int outputdatalength; | |
744 | compat_uptr_t b_key; | |
745 | compat_uptr_t n_modulus; | |
746 | }; | |
747 | ||
748 | static long trans_modexpo32(struct file *filp, unsigned int cmd, | |
749 | unsigned long arg) | |
750 | { | |
751 | struct compat_ica_rsa_modexpo __user *umex32 = compat_ptr(arg); | |
752 | struct compat_ica_rsa_modexpo mex32; | |
753 | struct ica_rsa_modexpo mex64; | |
754 | long rc; | |
755 | ||
756 | if (copy_from_user(&mex32, umex32, sizeof(mex32))) | |
757 | return -EFAULT; | |
758 | mex64.inputdata = compat_ptr(mex32.inputdata); | |
759 | mex64.inputdatalength = mex32.inputdatalength; | |
760 | mex64.outputdata = compat_ptr(mex32.outputdata); | |
761 | mex64.outputdatalength = mex32.outputdatalength; | |
762 | mex64.b_key = compat_ptr(mex32.b_key); | |
763 | mex64.n_modulus = compat_ptr(mex32.n_modulus); | |
764 | do { | |
765 | rc = zcrypt_rsa_modexpo(&mex64); | |
766 | } while (rc == -EAGAIN); | |
767 | if (!rc) | |
768 | rc = put_user(mex64.outputdatalength, | |
769 | &umex32->outputdatalength); | |
770 | return rc; | |
771 | } | |
772 | ||
773 | struct compat_ica_rsa_modexpo_crt { | |
774 | compat_uptr_t inputdata; | |
775 | unsigned int inputdatalength; | |
776 | compat_uptr_t outputdata; | |
777 | unsigned int outputdatalength; | |
778 | compat_uptr_t bp_key; | |
779 | compat_uptr_t bq_key; | |
780 | compat_uptr_t np_prime; | |
781 | compat_uptr_t nq_prime; | |
782 | compat_uptr_t u_mult_inv; | |
783 | }; | |
784 | ||
785 | static long trans_modexpo_crt32(struct file *filp, unsigned int cmd, | |
786 | unsigned long arg) | |
787 | { | |
788 | struct compat_ica_rsa_modexpo_crt __user *ucrt32 = compat_ptr(arg); | |
789 | struct compat_ica_rsa_modexpo_crt crt32; | |
790 | struct ica_rsa_modexpo_crt crt64; | |
791 | long rc; | |
792 | ||
793 | if (copy_from_user(&crt32, ucrt32, sizeof(crt32))) | |
794 | return -EFAULT; | |
795 | crt64.inputdata = compat_ptr(crt32.inputdata); | |
796 | crt64.inputdatalength = crt32.inputdatalength; | |
797 | crt64.outputdata= compat_ptr(crt32.outputdata); | |
798 | crt64.outputdatalength = crt32.outputdatalength; | |
799 | crt64.bp_key = compat_ptr(crt32.bp_key); | |
800 | crt64.bq_key = compat_ptr(crt32.bq_key); | |
801 | crt64.np_prime = compat_ptr(crt32.np_prime); | |
802 | crt64.nq_prime = compat_ptr(crt32.nq_prime); | |
803 | crt64.u_mult_inv = compat_ptr(crt32.u_mult_inv); | |
804 | do { | |
805 | rc = zcrypt_rsa_crt(&crt64); | |
806 | } while (rc == -EAGAIN); | |
807 | if (!rc) | |
808 | rc = put_user(crt64.outputdatalength, | |
809 | &ucrt32->outputdatalength); | |
810 | return rc; | |
811 | } | |
812 | ||
5432114b RW |
813 | struct compat_ica_xcRB { |
814 | unsigned short agent_ID; | |
815 | unsigned int user_defined; | |
816 | unsigned short request_ID; | |
817 | unsigned int request_control_blk_length; | |
818 | unsigned char padding1[16 - sizeof (compat_uptr_t)]; | |
819 | compat_uptr_t request_control_blk_addr; | |
820 | unsigned int request_data_length; | |
821 | char padding2[16 - sizeof (compat_uptr_t)]; | |
822 | compat_uptr_t request_data_address; | |
823 | unsigned int reply_control_blk_length; | |
824 | char padding3[16 - sizeof (compat_uptr_t)]; | |
825 | compat_uptr_t reply_control_blk_addr; | |
826 | unsigned int reply_data_length; | |
827 | char padding4[16 - sizeof (compat_uptr_t)]; | |
828 | compat_uptr_t reply_data_addr; | |
829 | unsigned short priority_window; | |
830 | unsigned int status; | |
831 | } __attribute__((packed)); | |
832 | ||
833 | static long trans_xcRB32(struct file *filp, unsigned int cmd, | |
834 | unsigned long arg) | |
835 | { | |
836 | struct compat_ica_xcRB __user *uxcRB32 = compat_ptr(arg); | |
837 | struct compat_ica_xcRB xcRB32; | |
838 | struct ica_xcRB xcRB64; | |
839 | long rc; | |
840 | ||
841 | if (copy_from_user(&xcRB32, uxcRB32, sizeof(xcRB32))) | |
842 | return -EFAULT; | |
843 | xcRB64.agent_ID = xcRB32.agent_ID; | |
844 | xcRB64.user_defined = xcRB32.user_defined; | |
845 | xcRB64.request_ID = xcRB32.request_ID; | |
846 | xcRB64.request_control_blk_length = | |
847 | xcRB32.request_control_blk_length; | |
848 | xcRB64.request_control_blk_addr = | |
849 | compat_ptr(xcRB32.request_control_blk_addr); | |
850 | xcRB64.request_data_length = | |
851 | xcRB32.request_data_length; | |
852 | xcRB64.request_data_address = | |
853 | compat_ptr(xcRB32.request_data_address); | |
854 | xcRB64.reply_control_blk_length = | |
855 | xcRB32.reply_control_blk_length; | |
856 | xcRB64.reply_control_blk_addr = | |
857 | compat_ptr(xcRB32.reply_control_blk_addr); | |
858 | xcRB64.reply_data_length = xcRB32.reply_data_length; | |
859 | xcRB64.reply_data_addr = | |
860 | compat_ptr(xcRB32.reply_data_addr); | |
861 | xcRB64.priority_window = xcRB32.priority_window; | |
862 | xcRB64.status = xcRB32.status; | |
863 | do { | |
864 | rc = zcrypt_send_cprb(&xcRB64); | |
865 | } while (rc == -EAGAIN); | |
866 | xcRB32.reply_control_blk_length = xcRB64.reply_control_blk_length; | |
867 | xcRB32.reply_data_length = xcRB64.reply_data_length; | |
868 | xcRB32.status = xcRB64.status; | |
869 | if (copy_to_user(uxcRB32, &xcRB32, sizeof(xcRB32))) | |
870 | return -EFAULT; | |
871 | return rc; | |
872 | } | |
873 | ||
2b67fc46 | 874 | static long zcrypt_compat_ioctl(struct file *filp, unsigned int cmd, |
2dbc2418 MS |
875 | unsigned long arg) |
876 | { | |
877 | if (cmd == ICARSAMODEXPO) | |
878 | return trans_modexpo32(filp, cmd, arg); | |
879 | if (cmd == ICARSACRT) | |
880 | return trans_modexpo_crt32(filp, cmd, arg); | |
5432114b RW |
881 | if (cmd == ZSECSENDCPRB) |
882 | return trans_xcRB32(filp, cmd, arg); | |
2dbc2418 MS |
883 | return zcrypt_unlocked_ioctl(filp, cmd, arg); |
884 | } | |
885 | #endif | |
886 | ||
1749a81d | 887 | /* |
2dbc2418 MS |
888 | * Misc device file operations. |
889 | */ | |
d54b1fdb | 890 | static const struct file_operations zcrypt_fops = { |
2dbc2418 MS |
891 | .owner = THIS_MODULE, |
892 | .read = zcrypt_read, | |
893 | .write = zcrypt_write, | |
894 | .unlocked_ioctl = zcrypt_unlocked_ioctl, | |
895 | #ifdef CONFIG_COMPAT | |
896 | .compat_ioctl = zcrypt_compat_ioctl, | |
897 | #endif | |
898 | .open = zcrypt_open, | |
6038f373 AB |
899 | .release = zcrypt_release, |
900 | .llseek = no_llseek, | |
2dbc2418 MS |
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 | ||
34b9243a | 917 | static void sprintcl(struct seq_file *m, unsigned char *addr, unsigned int len) |
2dbc2418 | 918 | { |
34b9243a | 919 | int i; |
2dbc2418 | 920 | |
2dbc2418 | 921 | for (i = 0; i < len; i++) |
34b9243a AD |
922 | seq_printf(m, "%01x", (unsigned int) addr[i]); |
923 | seq_putc(m, ' '); | |
2dbc2418 MS |
924 | } |
925 | ||
34b9243a | 926 | static void sprintrw(struct seq_file *m, unsigned char *addr, unsigned int len) |
2dbc2418 | 927 | { |
34b9243a | 928 | int inl, c, cx; |
2dbc2418 | 929 | |
34b9243a | 930 | seq_printf(m, " "); |
2dbc2418 MS |
931 | inl = 0; |
932 | for (c = 0; c < (len / 16); c++) { | |
34b9243a | 933 | sprintcl(m, addr+inl, 16); |
2dbc2418 MS |
934 | inl += 16; |
935 | } | |
936 | cx = len%16; | |
937 | if (cx) { | |
34b9243a | 938 | sprintcl(m, addr+inl, cx); |
2dbc2418 MS |
939 | inl += cx; |
940 | } | |
34b9243a | 941 | seq_putc(m, '\n'); |
2dbc2418 MS |
942 | } |
943 | ||
34b9243a AD |
944 | static void sprinthx(unsigned char *title, struct seq_file *m, |
945 | unsigned char *addr, unsigned int len) | |
2dbc2418 | 946 | { |
34b9243a | 947 | int inl, r, rx; |
2dbc2418 | 948 | |
34b9243a | 949 | seq_printf(m, "\n%s\n", title); |
2dbc2418 MS |
950 | inl = 0; |
951 | for (r = 0; r < (len / 64); r++) { | |
34b9243a | 952 | sprintrw(m, addr+inl, 64); |
2dbc2418 MS |
953 | inl += 64; |
954 | } | |
955 | rx = len % 64; | |
956 | if (rx) { | |
34b9243a | 957 | sprintrw(m, addr+inl, rx); |
2dbc2418 MS |
958 | inl += rx; |
959 | } | |
34b9243a | 960 | seq_putc(m, '\n'); |
2dbc2418 MS |
961 | } |
962 | ||
34b9243a AD |
963 | static void sprinthx4(unsigned char *title, struct seq_file *m, |
964 | unsigned int *array, unsigned int len) | |
2dbc2418 | 965 | { |
34b9243a | 966 | int r; |
2dbc2418 | 967 | |
34b9243a | 968 | seq_printf(m, "\n%s\n", title); |
2dbc2418 MS |
969 | for (r = 0; r < len; r++) { |
970 | if ((r % 8) == 0) | |
34b9243a AD |
971 | seq_printf(m, " "); |
972 | seq_printf(m, "%08X ", array[r]); | |
2dbc2418 | 973 | if ((r % 8) == 7) |
34b9243a | 974 | seq_putc(m, '\n'); |
2dbc2418 | 975 | } |
34b9243a | 976 | seq_putc(m, '\n'); |
2dbc2418 MS |
977 | } |
978 | ||
34b9243a | 979 | static int zcrypt_proc_show(struct seq_file *m, void *v) |
2dbc2418 | 980 | { |
34b9243a AD |
981 | char workarea[sizeof(int) * AP_DEVICES]; |
982 | ||
983 | seq_printf(m, "\nzcrypt version: %d.%d.%d\n", | |
984 | ZCRYPT_VERSION, ZCRYPT_RELEASE, ZCRYPT_VARIANT); | |
985 | seq_printf(m, "Cryptographic domain: %d\n", ap_domain_index); | |
986 | seq_printf(m, "Total device count: %d\n", zcrypt_device_count); | |
987 | seq_printf(m, "PCICA count: %d\n", zcrypt_count_type(ZCRYPT_PCICA)); | |
988 | seq_printf(m, "PCICC count: %d\n", zcrypt_count_type(ZCRYPT_PCICC)); | |
989 | seq_printf(m, "PCIXCC MCL2 count: %d\n", | |
990 | zcrypt_count_type(ZCRYPT_PCIXCC_MCL2)); | |
991 | seq_printf(m, "PCIXCC MCL3 count: %d\n", | |
992 | zcrypt_count_type(ZCRYPT_PCIXCC_MCL3)); | |
993 | seq_printf(m, "CEX2C count: %d\n", zcrypt_count_type(ZCRYPT_CEX2C)); | |
994 | seq_printf(m, "CEX2A count: %d\n", zcrypt_count_type(ZCRYPT_CEX2A)); | |
995 | seq_printf(m, "CEX3C count: %d\n", zcrypt_count_type(ZCRYPT_CEX3C)); | |
996 | seq_printf(m, "CEX3A count: %d\n", zcrypt_count_type(ZCRYPT_CEX3A)); | |
997 | seq_printf(m, "requestq count: %d\n", zcrypt_requestq_count()); | |
998 | seq_printf(m, "pendingq count: %d\n", zcrypt_pendingq_count()); | |
999 | seq_printf(m, "Total open handles: %d\n\n", | |
1000 | atomic_read(&zcrypt_open_count)); | |
2dbc2418 | 1001 | zcrypt_status_mask(workarea); |
34b9243a AD |
1002 | sprinthx("Online devices: 1=PCICA 2=PCICC 3=PCIXCC(MCL2) " |
1003 | "4=PCIXCC(MCL3) 5=CEX2C 6=CEX2A 7=CEX3C 8=CEX3A", | |
1004 | m, workarea, AP_DEVICES); | |
2dbc2418 | 1005 | zcrypt_qdepth_mask(workarea); |
34b9243a | 1006 | sprinthx("Waiting work element counts", m, workarea, AP_DEVICES); |
2b67fc46 | 1007 | zcrypt_perdev_reqcnt((int *) workarea); |
34b9243a AD |
1008 | sprinthx4("Per-device successfully completed request counts", |
1009 | m, (unsigned int *) workarea, AP_DEVICES); | |
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | static int zcrypt_proc_open(struct inode *inode, struct file *file) | |
1014 | { | |
1015 | return single_open(file, zcrypt_proc_show, NULL); | |
2dbc2418 MS |
1016 | } |
1017 | ||
1018 | static void zcrypt_disable_card(int index) | |
1019 | { | |
1020 | struct zcrypt_device *zdev; | |
1021 | ||
1022 | spin_lock_bh(&zcrypt_device_lock); | |
1023 | list_for_each_entry(zdev, &zcrypt_device_list, list) | |
1024 | if (AP_QID_DEVICE(zdev->ap_dev->qid) == index) { | |
1025 | zdev->online = 0; | |
1026 | ap_flush_queue(zdev->ap_dev); | |
1027 | break; | |
1028 | } | |
1029 | spin_unlock_bh(&zcrypt_device_lock); | |
1030 | } | |
1031 | ||
1032 | static void zcrypt_enable_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 = 1; | |
1040 | break; | |
1041 | } | |
1042 | spin_unlock_bh(&zcrypt_device_lock); | |
1043 | } | |
1044 | ||
34b9243a AD |
1045 | static ssize_t zcrypt_proc_write(struct file *file, const char __user *buffer, |
1046 | size_t count, loff_t *pos) | |
2dbc2418 MS |
1047 | { |
1048 | unsigned char *lbuf, *ptr; | |
34b9243a | 1049 | size_t local_count; |
2dbc2418 MS |
1050 | int j; |
1051 | ||
1052 | if (count <= 0) | |
1053 | return 0; | |
1054 | ||
1055 | #define LBUFSIZE 1200UL | |
1056 | lbuf = kmalloc(LBUFSIZE, GFP_KERNEL); | |
1a89dd8f | 1057 | if (!lbuf) |
2dbc2418 | 1058 | return 0; |
2dbc2418 MS |
1059 | |
1060 | local_count = min(LBUFSIZE - 1, count); | |
1061 | if (copy_from_user(lbuf, buffer, local_count) != 0) { | |
1062 | kfree(lbuf); | |
1063 | return -EFAULT; | |
1064 | } | |
1065 | lbuf[local_count] = '\0'; | |
1066 | ||
1067 | ptr = strstr(lbuf, "Online devices"); | |
1a89dd8f | 1068 | if (!ptr) |
2dbc2418 | 1069 | goto out; |
2dbc2418 | 1070 | ptr = strstr(ptr, "\n"); |
1a89dd8f | 1071 | if (!ptr) |
2dbc2418 | 1072 | goto out; |
2dbc2418 MS |
1073 | ptr++; |
1074 | ||
1a89dd8f | 1075 | if (strstr(ptr, "Waiting work element counts") == NULL) |
2dbc2418 | 1076 | goto out; |
2dbc2418 MS |
1077 | |
1078 | for (j = 0; j < 64 && *ptr; ptr++) { | |
1749a81d | 1079 | /* |
2dbc2418 MS |
1080 | * '0' for no device, '1' for PCICA, '2' for PCICC, |
1081 | * '3' for PCIXCC_MCL2, '4' for PCIXCC_MCL3, | |
1082 | * '5' for CEX2C and '6' for CEX2A' | |
ffda4f71 | 1083 | * '7' for CEX3C and '8' for CEX3A |
2dbc2418 | 1084 | */ |
ffda4f71 | 1085 | if (*ptr >= '0' && *ptr <= '8') |
2dbc2418 MS |
1086 | j++; |
1087 | else if (*ptr == 'd' || *ptr == 'D') | |
1088 | zcrypt_disable_card(j++); | |
1089 | else if (*ptr == 'e' || *ptr == 'E') | |
1090 | zcrypt_enable_card(j++); | |
1091 | else if (*ptr != ' ' && *ptr != '\t') | |
1092 | break; | |
1093 | } | |
1094 | out: | |
1095 | kfree(lbuf); | |
1096 | return count; | |
1097 | } | |
1098 | ||
34b9243a AD |
1099 | static const struct file_operations zcrypt_proc_fops = { |
1100 | .owner = THIS_MODULE, | |
1101 | .open = zcrypt_proc_open, | |
1102 | .read = seq_read, | |
1103 | .llseek = seq_lseek, | |
1104 | .release = single_release, | |
1105 | .write = zcrypt_proc_write, | |
1106 | }; | |
1107 | ||
2f7c8bd6 RW |
1108 | static int zcrypt_rng_device_count; |
1109 | static u32 *zcrypt_rng_buffer; | |
1110 | static int zcrypt_rng_buffer_index; | |
1111 | static DEFINE_MUTEX(zcrypt_rng_mutex); | |
1112 | ||
1113 | static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data) | |
1114 | { | |
1115 | int rc; | |
1116 | ||
1749a81d | 1117 | /* |
2f7c8bd6 RW |
1118 | * We don't need locking here because the RNG API guarantees serialized |
1119 | * read method calls. | |
1120 | */ | |
1121 | if (zcrypt_rng_buffer_index == 0) { | |
1122 | rc = zcrypt_rng((char *) zcrypt_rng_buffer); | |
1123 | if (rc < 0) | |
1124 | return -EIO; | |
1125 | zcrypt_rng_buffer_index = rc / sizeof *data; | |
1126 | } | |
1127 | *data = zcrypt_rng_buffer[--zcrypt_rng_buffer_index]; | |
1128 | return sizeof *data; | |
1129 | } | |
1130 | ||
1131 | static struct hwrng zcrypt_rng_dev = { | |
1132 | .name = "zcrypt", | |
1133 | .data_read = zcrypt_rng_data_read, | |
1134 | }; | |
1135 | ||
1136 | static int zcrypt_rng_device_add(void) | |
1137 | { | |
1138 | int rc = 0; | |
1139 | ||
1140 | mutex_lock(&zcrypt_rng_mutex); | |
1141 | if (zcrypt_rng_device_count == 0) { | |
1142 | zcrypt_rng_buffer = (u32 *) get_zeroed_page(GFP_KERNEL); | |
1143 | if (!zcrypt_rng_buffer) { | |
1144 | rc = -ENOMEM; | |
1145 | goto out; | |
1146 | } | |
1147 | zcrypt_rng_buffer_index = 0; | |
1148 | rc = hwrng_register(&zcrypt_rng_dev); | |
1149 | if (rc) | |
1150 | goto out_free; | |
1151 | zcrypt_rng_device_count = 1; | |
1152 | } else | |
1153 | zcrypt_rng_device_count++; | |
1154 | mutex_unlock(&zcrypt_rng_mutex); | |
1155 | return 0; | |
1156 | ||
1157 | out_free: | |
1158 | free_page((unsigned long) zcrypt_rng_buffer); | |
1159 | out: | |
1160 | mutex_unlock(&zcrypt_rng_mutex); | |
1161 | return rc; | |
1162 | } | |
1163 | ||
1164 | static void zcrypt_rng_device_remove(void) | |
1165 | { | |
1166 | mutex_lock(&zcrypt_rng_mutex); | |
1167 | zcrypt_rng_device_count--; | |
1168 | if (zcrypt_rng_device_count == 0) { | |
1169 | hwrng_unregister(&zcrypt_rng_dev); | |
1170 | free_page((unsigned long) zcrypt_rng_buffer); | |
1171 | } | |
1172 | mutex_unlock(&zcrypt_rng_mutex); | |
1173 | } | |
1174 | ||
2dbc2418 | 1175 | /** |
1749a81d FB |
1176 | * zcrypt_api_init(): Module initialization. |
1177 | * | |
2dbc2418 MS |
1178 | * The module initialization code. |
1179 | */ | |
1180 | int __init zcrypt_api_init(void) | |
1181 | { | |
1182 | int rc; | |
1183 | ||
1184 | /* Register the request sprayer. */ | |
1185 | rc = misc_register(&zcrypt_misc_device); | |
1a89dd8f | 1186 | if (rc < 0) |
2dbc2418 | 1187 | goto out; |
2dbc2418 MS |
1188 | |
1189 | /* Set up the proc file system */ | |
34b9243a | 1190 | zcrypt_entry = proc_create("driver/z90crypt", 0644, NULL, &zcrypt_proc_fops); |
2dbc2418 | 1191 | if (!zcrypt_entry) { |
2dbc2418 MS |
1192 | rc = -ENOMEM; |
1193 | goto out_misc; | |
1194 | } | |
2dbc2418 MS |
1195 | |
1196 | return 0; | |
1197 | ||
1198 | out_misc: | |
1199 | misc_deregister(&zcrypt_misc_device); | |
1200 | out: | |
1201 | return rc; | |
1202 | } | |
1203 | ||
1204 | /** | |
1749a81d FB |
1205 | * zcrypt_api_exit(): Module termination. |
1206 | * | |
2dbc2418 MS |
1207 | * The module termination code. |
1208 | */ | |
1209 | void zcrypt_api_exit(void) | |
1210 | { | |
1211 | remove_proc_entry("driver/z90crypt", NULL); | |
1212 | misc_deregister(&zcrypt_misc_device); | |
1213 | } | |
1214 | ||
1215 | #ifndef CONFIG_ZCRYPT_MONOLITHIC | |
1216 | module_init(zcrypt_api_init); | |
1217 | module_exit(zcrypt_api_exit); | |
1218 | #endif |