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963ed931 MS |
1 | /* |
2 | * linux/drivers/s390/crypto/zcrypt_cex2a.c | |
3 | * | |
5432114b | 4 | * zcrypt 2.1.0 |
963ed931 MS |
5 | * |
6 | * Copyright (C) 2001, 2006 IBM Corporation | |
7 | * Author(s): Robert Burroughs | |
8 | * Eric Rossman (edrossma@us.ibm.com) | |
9 | * | |
10 | * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com) | |
11 | * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com> | |
12 | * Ralph Wuerthner <rwuerthn@de.ibm.com> | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2, or (at your option) | |
17 | * any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, write to the Free Software | |
26 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
27 | */ | |
28 | ||
29 | #include <linux/module.h> | |
5a0e3ad6 | 30 | #include <linux/slab.h> |
963ed931 MS |
31 | #include <linux/init.h> |
32 | #include <linux/err.h> | |
60063497 | 33 | #include <linux/atomic.h> |
963ed931 MS |
34 | #include <asm/uaccess.h> |
35 | ||
36 | #include "ap_bus.h" | |
37 | #include "zcrypt_api.h" | |
38 | #include "zcrypt_error.h" | |
39 | #include "zcrypt_cex2a.h" | |
40 | ||
41 | #define CEX2A_MIN_MOD_SIZE 1 /* 8 bits */ | |
42 | #define CEX2A_MAX_MOD_SIZE 256 /* 2048 bits */ | |
8e89b6be | 43 | #define CEX3A_MIN_MOD_SIZE CEX2A_MIN_MOD_SIZE |
3e309a66 | 44 | #define CEX3A_MAX_MOD_SIZE 512 /* 4096 bits */ |
963ed931 MS |
45 | |
46 | #define CEX2A_SPEED_RATING 970 | |
7a6f5cd0 | 47 | #define CEX3A_SPEED_RATING 900 /* Fixme: Needs finetuning */ |
963ed931 MS |
48 | |
49 | #define CEX2A_MAX_MESSAGE_SIZE 0x390 /* sizeof(struct type50_crb2_msg) */ | |
50 | #define CEX2A_MAX_RESPONSE_SIZE 0x110 /* max outputdatalength + type80_hdr */ | |
51 | ||
3e309a66 FB |
52 | #define CEX3A_MAX_RESPONSE_SIZE 0x210 /* 512 bit modulus |
53 | * (max outputdatalength) + | |
54 | * type80_hdr*/ | |
55 | #define CEX3A_MAX_MESSAGE_SIZE sizeof(struct type50_crb3_msg) | |
8e89b6be | 56 | |
963ed931 | 57 | #define CEX2A_CLEANUP_TIME (15*HZ) |
8e89b6be | 58 | #define CEX3A_CLEANUP_TIME CEX2A_CLEANUP_TIME |
963ed931 MS |
59 | |
60 | static struct ap_device_id zcrypt_cex2a_ids[] = { | |
61 | { AP_DEVICE(AP_DEVICE_TYPE_CEX2A) }, | |
ffda4f71 | 62 | { AP_DEVICE(AP_DEVICE_TYPE_CEX3A) }, |
963ed931 MS |
63 | { /* end of list */ }, |
64 | }; | |
65 | ||
66 | #ifndef CONFIG_ZCRYPT_MONOLITHIC | |
67 | MODULE_DEVICE_TABLE(ap, zcrypt_cex2a_ids); | |
68 | MODULE_AUTHOR("IBM Corporation"); | |
69 | MODULE_DESCRIPTION("CEX2A Cryptographic Coprocessor device driver, " | |
70 | "Copyright 2001, 2006 IBM Corporation"); | |
71 | MODULE_LICENSE("GPL"); | |
72 | #endif | |
73 | ||
74 | static int zcrypt_cex2a_probe(struct ap_device *ap_dev); | |
75 | static void zcrypt_cex2a_remove(struct ap_device *ap_dev); | |
76 | static void zcrypt_cex2a_receive(struct ap_device *, struct ap_message *, | |
77 | struct ap_message *); | |
78 | ||
79 | static struct ap_driver zcrypt_cex2a_driver = { | |
80 | .probe = zcrypt_cex2a_probe, | |
81 | .remove = zcrypt_cex2a_remove, | |
82 | .receive = zcrypt_cex2a_receive, | |
83 | .ids = zcrypt_cex2a_ids, | |
af512ed0 | 84 | .request_timeout = CEX2A_CLEANUP_TIME, |
963ed931 MS |
85 | }; |
86 | ||
87 | /** | |
88 | * Convert a ICAMEX message to a type50 MEX message. | |
89 | * | |
90 | * @zdev: crypto device pointer | |
91 | * @zreq: crypto request pointer | |
92 | * @mex: pointer to user input data | |
93 | * | |
94 | * Returns 0 on success or -EFAULT. | |
95 | */ | |
96 | static int ICAMEX_msg_to_type50MEX_msg(struct zcrypt_device *zdev, | |
97 | struct ap_message *ap_msg, | |
98 | struct ica_rsa_modexpo *mex) | |
99 | { | |
100 | unsigned char *mod, *exp, *inp; | |
101 | int mod_len; | |
102 | ||
103 | mod_len = mex->inputdatalength; | |
104 | ||
105 | if (mod_len <= 128) { | |
106 | struct type50_meb1_msg *meb1 = ap_msg->message; | |
107 | memset(meb1, 0, sizeof(*meb1)); | |
108 | ap_msg->length = sizeof(*meb1); | |
109 | meb1->header.msg_type_code = TYPE50_TYPE_CODE; | |
110 | meb1->header.msg_len = sizeof(*meb1); | |
111 | meb1->keyblock_type = TYPE50_MEB1_FMT; | |
112 | mod = meb1->modulus + sizeof(meb1->modulus) - mod_len; | |
113 | exp = meb1->exponent + sizeof(meb1->exponent) - mod_len; | |
114 | inp = meb1->message + sizeof(meb1->message) - mod_len; | |
3e309a66 | 115 | } else if (mod_len <= 256) { |
963ed931 MS |
116 | struct type50_meb2_msg *meb2 = ap_msg->message; |
117 | memset(meb2, 0, sizeof(*meb2)); | |
118 | ap_msg->length = sizeof(*meb2); | |
119 | meb2->header.msg_type_code = TYPE50_TYPE_CODE; | |
120 | meb2->header.msg_len = sizeof(*meb2); | |
121 | meb2->keyblock_type = TYPE50_MEB2_FMT; | |
122 | mod = meb2->modulus + sizeof(meb2->modulus) - mod_len; | |
123 | exp = meb2->exponent + sizeof(meb2->exponent) - mod_len; | |
124 | inp = meb2->message + sizeof(meb2->message) - mod_len; | |
3e309a66 FB |
125 | } else { |
126 | /* mod_len > 256 = 4096 bit RSA Key */ | |
127 | struct type50_meb3_msg *meb3 = ap_msg->message; | |
128 | memset(meb3, 0, sizeof(*meb3)); | |
129 | ap_msg->length = sizeof(*meb3); | |
130 | meb3->header.msg_type_code = TYPE50_TYPE_CODE; | |
131 | meb3->header.msg_len = sizeof(*meb3); | |
132 | meb3->keyblock_type = TYPE50_MEB3_FMT; | |
133 | mod = meb3->modulus + sizeof(meb3->modulus) - mod_len; | |
134 | exp = meb3->exponent + sizeof(meb3->exponent) - mod_len; | |
135 | inp = meb3->message + sizeof(meb3->message) - mod_len; | |
963ed931 MS |
136 | } |
137 | ||
138 | if (copy_from_user(mod, mex->n_modulus, mod_len) || | |
139 | copy_from_user(exp, mex->b_key, mod_len) || | |
140 | copy_from_user(inp, mex->inputdata, mod_len)) | |
141 | return -EFAULT; | |
142 | return 0; | |
143 | } | |
144 | ||
145 | /** | |
146 | * Convert a ICACRT message to a type50 CRT message. | |
147 | * | |
148 | * @zdev: crypto device pointer | |
149 | * @zreq: crypto request pointer | |
150 | * @crt: pointer to user input data | |
151 | * | |
152 | * Returns 0 on success or -EFAULT. | |
153 | */ | |
154 | static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev, | |
155 | struct ap_message *ap_msg, | |
156 | struct ica_rsa_modexpo_crt *crt) | |
157 | { | |
3e309a66 | 158 | int mod_len, short_len, long_len, long_offset, limit; |
963ed931 MS |
159 | unsigned char *p, *q, *dp, *dq, *u, *inp; |
160 | ||
161 | mod_len = crt->inputdatalength; | |
162 | short_len = mod_len / 2; | |
163 | long_len = mod_len / 2 + 8; | |
164 | ||
165 | /* | |
166 | * CEX2A cannot handle p, dp, or U > 128 bytes. | |
167 | * If we have one of these, we need to do extra checking. | |
3e309a66 | 168 | * For CEX3A the limit is 256 bytes. |
963ed931 | 169 | */ |
3e309a66 FB |
170 | if (zdev->max_mod_size == CEX3A_MAX_MOD_SIZE) |
171 | limit = 256; | |
172 | else | |
173 | limit = 128; | |
174 | ||
175 | if (long_len > limit) { | |
963ed931 MS |
176 | /* |
177 | * zcrypt_rsa_crt already checked for the leading | |
178 | * zeroes of np_prime, bp_key and u_mult_inc. | |
179 | */ | |
3e309a66 FB |
180 | long_offset = long_len - limit; |
181 | long_len = limit; | |
963ed931 MS |
182 | } else |
183 | long_offset = 0; | |
184 | ||
185 | /* | |
186 | * Instead of doing extra work for p, dp, U > 64 bytes, we'll just use | |
187 | * the larger message structure. | |
188 | */ | |
189 | if (long_len <= 64) { | |
190 | struct type50_crb1_msg *crb1 = ap_msg->message; | |
191 | memset(crb1, 0, sizeof(*crb1)); | |
192 | ap_msg->length = sizeof(*crb1); | |
193 | crb1->header.msg_type_code = TYPE50_TYPE_CODE; | |
194 | crb1->header.msg_len = sizeof(*crb1); | |
195 | crb1->keyblock_type = TYPE50_CRB1_FMT; | |
196 | p = crb1->p + sizeof(crb1->p) - long_len; | |
197 | q = crb1->q + sizeof(crb1->q) - short_len; | |
198 | dp = crb1->dp + sizeof(crb1->dp) - long_len; | |
199 | dq = crb1->dq + sizeof(crb1->dq) - short_len; | |
200 | u = crb1->u + sizeof(crb1->u) - long_len; | |
201 | inp = crb1->message + sizeof(crb1->message) - mod_len; | |
3e309a66 | 202 | } else if (long_len <= 128) { |
963ed931 MS |
203 | struct type50_crb2_msg *crb2 = ap_msg->message; |
204 | memset(crb2, 0, sizeof(*crb2)); | |
205 | ap_msg->length = sizeof(*crb2); | |
206 | crb2->header.msg_type_code = TYPE50_TYPE_CODE; | |
207 | crb2->header.msg_len = sizeof(*crb2); | |
208 | crb2->keyblock_type = TYPE50_CRB2_FMT; | |
209 | p = crb2->p + sizeof(crb2->p) - long_len; | |
210 | q = crb2->q + sizeof(crb2->q) - short_len; | |
211 | dp = crb2->dp + sizeof(crb2->dp) - long_len; | |
212 | dq = crb2->dq + sizeof(crb2->dq) - short_len; | |
213 | u = crb2->u + sizeof(crb2->u) - long_len; | |
214 | inp = crb2->message + sizeof(crb2->message) - mod_len; | |
3e309a66 FB |
215 | } else { |
216 | /* long_len >= 256 */ | |
217 | struct type50_crb3_msg *crb3 = ap_msg->message; | |
218 | memset(crb3, 0, sizeof(*crb3)); | |
219 | ap_msg->length = sizeof(*crb3); | |
220 | crb3->header.msg_type_code = TYPE50_TYPE_CODE; | |
221 | crb3->header.msg_len = sizeof(*crb3); | |
222 | crb3->keyblock_type = TYPE50_CRB3_FMT; | |
223 | p = crb3->p + sizeof(crb3->p) - long_len; | |
224 | q = crb3->q + sizeof(crb3->q) - short_len; | |
225 | dp = crb3->dp + sizeof(crb3->dp) - long_len; | |
226 | dq = crb3->dq + sizeof(crb3->dq) - short_len; | |
227 | u = crb3->u + sizeof(crb3->u) - long_len; | |
228 | inp = crb3->message + sizeof(crb3->message) - mod_len; | |
963ed931 MS |
229 | } |
230 | ||
231 | if (copy_from_user(p, crt->np_prime + long_offset, long_len) || | |
232 | copy_from_user(q, crt->nq_prime, short_len) || | |
233 | copy_from_user(dp, crt->bp_key + long_offset, long_len) || | |
234 | copy_from_user(dq, crt->bq_key, short_len) || | |
235 | copy_from_user(u, crt->u_mult_inv + long_offset, long_len) || | |
236 | copy_from_user(inp, crt->inputdata, mod_len)) | |
237 | return -EFAULT; | |
238 | ||
963ed931 MS |
239 | return 0; |
240 | } | |
241 | ||
242 | /** | |
243 | * Copy results from a type 80 reply message back to user space. | |
244 | * | |
245 | * @zdev: crypto device pointer | |
246 | * @reply: reply AP message. | |
247 | * @data: pointer to user output data | |
248 | * @length: size of user output data | |
249 | * | |
250 | * Returns 0 on success or -EFAULT. | |
251 | */ | |
252 | static int convert_type80(struct zcrypt_device *zdev, | |
253 | struct ap_message *reply, | |
254 | char __user *outputdata, | |
255 | unsigned int outputdatalength) | |
256 | { | |
257 | struct type80_hdr *t80h = reply->message; | |
258 | unsigned char *data; | |
259 | ||
260 | if (t80h->len < sizeof(*t80h) + outputdatalength) { | |
261 | /* The result is too short, the CEX2A card may not do that.. */ | |
262 | zdev->online = 0; | |
263 | return -EAGAIN; /* repeat the request on a different device. */ | |
264 | } | |
3e309a66 FB |
265 | if (zdev->user_space_type == ZCRYPT_CEX2A) |
266 | BUG_ON(t80h->len > CEX2A_MAX_RESPONSE_SIZE); | |
267 | else | |
268 | BUG_ON(t80h->len > CEX3A_MAX_RESPONSE_SIZE); | |
963ed931 MS |
269 | data = reply->message + t80h->len - outputdatalength; |
270 | if (copy_to_user(outputdata, data, outputdatalength)) | |
271 | return -EFAULT; | |
272 | return 0; | |
273 | } | |
274 | ||
275 | static int convert_response(struct zcrypt_device *zdev, | |
276 | struct ap_message *reply, | |
277 | char __user *outputdata, | |
278 | unsigned int outputdatalength) | |
279 | { | |
280 | /* Response type byte is the second byte in the response. */ | |
281 | switch (((unsigned char *) reply->message)[1]) { | |
282 | case TYPE82_RSP_CODE: | |
283 | case TYPE88_RSP_CODE: | |
284 | return convert_error(zdev, reply); | |
285 | case TYPE80_RSP_CODE: | |
286 | return convert_type80(zdev, reply, | |
287 | outputdata, outputdatalength); | |
288 | default: /* Unknown response type, this should NEVER EVER happen */ | |
963ed931 MS |
289 | zdev->online = 0; |
290 | return -EAGAIN; /* repeat the request on a different device. */ | |
291 | } | |
292 | } | |
293 | ||
294 | /** | |
295 | * This function is called from the AP bus code after a crypto request | |
296 | * "msg" has finished with the reply message "reply". | |
297 | * It is called from tasklet context. | |
298 | * @ap_dev: pointer to the AP device | |
299 | * @msg: pointer to the AP message | |
300 | * @reply: pointer to the AP reply message | |
301 | */ | |
302 | static void zcrypt_cex2a_receive(struct ap_device *ap_dev, | |
303 | struct ap_message *msg, | |
304 | struct ap_message *reply) | |
305 | { | |
306 | static struct error_hdr error_reply = { | |
307 | .type = TYPE82_RSP_CODE, | |
308 | .reply_code = REP82_ERROR_MACHINE_FAILURE, | |
309 | }; | |
21e7b2c4 | 310 | struct type80_hdr *t80h; |
963ed931 MS |
311 | int length; |
312 | ||
313 | /* Copy the reply message to the request message buffer. */ | |
21e7b2c4 | 314 | if (IS_ERR(reply)) { |
963ed931 | 315 | memcpy(msg->message, &error_reply, sizeof(error_reply)); |
21e7b2c4 JL |
316 | goto out; |
317 | } | |
318 | t80h = reply->message; | |
319 | if (t80h->type == TYPE80_RSP_CODE) { | |
3e309a66 FB |
320 | if (ap_dev->device_type == AP_DEVICE_TYPE_CEX2A) |
321 | length = min(CEX2A_MAX_RESPONSE_SIZE, (int) t80h->len); | |
322 | else | |
323 | length = min(CEX3A_MAX_RESPONSE_SIZE, (int) t80h->len); | |
963ed931 MS |
324 | memcpy(msg->message, reply->message, length); |
325 | } else | |
326 | memcpy(msg->message, reply->message, sizeof error_reply); | |
21e7b2c4 | 327 | out: |
963ed931 MS |
328 | complete((struct completion *) msg->private); |
329 | } | |
330 | ||
331 | static atomic_t zcrypt_step = ATOMIC_INIT(0); | |
332 | ||
333 | /** | |
334 | * The request distributor calls this function if it picked the CEX2A | |
335 | * device to handle a modexpo request. | |
336 | * @zdev: pointer to zcrypt_device structure that identifies the | |
337 | * CEX2A device to the request distributor | |
338 | * @mex: pointer to the modexpo request buffer | |
339 | */ | |
340 | static long zcrypt_cex2a_modexpo(struct zcrypt_device *zdev, | |
341 | struct ica_rsa_modexpo *mex) | |
342 | { | |
343 | struct ap_message ap_msg; | |
344 | struct completion work; | |
345 | int rc; | |
346 | ||
468ffddf | 347 | ap_init_message(&ap_msg); |
3e309a66 FB |
348 | if (zdev->user_space_type == ZCRYPT_CEX2A) |
349 | ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL); | |
350 | else | |
351 | ap_msg.message = kmalloc(CEX3A_MAX_MESSAGE_SIZE, GFP_KERNEL); | |
963ed931 MS |
352 | if (!ap_msg.message) |
353 | return -ENOMEM; | |
354 | ap_msg.psmid = (((unsigned long long) current->pid) << 32) + | |
355 | atomic_inc_return(&zcrypt_step); | |
356 | ap_msg.private = &work; | |
357 | rc = ICAMEX_msg_to_type50MEX_msg(zdev, &ap_msg, mex); | |
358 | if (rc) | |
359 | goto out_free; | |
360 | init_completion(&work); | |
361 | ap_queue_message(zdev->ap_dev, &ap_msg); | |
af512ed0 RW |
362 | rc = wait_for_completion_interruptible(&work); |
363 | if (rc == 0) | |
963ed931 MS |
364 | rc = convert_response(zdev, &ap_msg, mex->outputdata, |
365 | mex->outputdatalength); | |
af512ed0 RW |
366 | else |
367 | /* Signal pending. */ | |
963ed931 | 368 | ap_cancel_message(zdev->ap_dev, &ap_msg); |
963ed931 MS |
369 | out_free: |
370 | kfree(ap_msg.message); | |
371 | return rc; | |
372 | } | |
373 | ||
374 | /** | |
375 | * The request distributor calls this function if it picked the CEX2A | |
376 | * device to handle a modexpo_crt request. | |
377 | * @zdev: pointer to zcrypt_device structure that identifies the | |
378 | * CEX2A device to the request distributor | |
379 | * @crt: pointer to the modexpoc_crt request buffer | |
380 | */ | |
381 | static long zcrypt_cex2a_modexpo_crt(struct zcrypt_device *zdev, | |
382 | struct ica_rsa_modexpo_crt *crt) | |
383 | { | |
384 | struct ap_message ap_msg; | |
385 | struct completion work; | |
386 | int rc; | |
387 | ||
468ffddf | 388 | ap_init_message(&ap_msg); |
3e309a66 FB |
389 | if (zdev->user_space_type == ZCRYPT_CEX2A) |
390 | ap_msg.message = kmalloc(CEX2A_MAX_MESSAGE_SIZE, GFP_KERNEL); | |
391 | else | |
392 | ap_msg.message = kmalloc(CEX3A_MAX_MESSAGE_SIZE, GFP_KERNEL); | |
963ed931 MS |
393 | if (!ap_msg.message) |
394 | return -ENOMEM; | |
395 | ap_msg.psmid = (((unsigned long long) current->pid) << 32) + | |
396 | atomic_inc_return(&zcrypt_step); | |
397 | ap_msg.private = &work; | |
398 | rc = ICACRT_msg_to_type50CRT_msg(zdev, &ap_msg, crt); | |
399 | if (rc) | |
400 | goto out_free; | |
401 | init_completion(&work); | |
402 | ap_queue_message(zdev->ap_dev, &ap_msg); | |
af512ed0 RW |
403 | rc = wait_for_completion_interruptible(&work); |
404 | if (rc == 0) | |
963ed931 MS |
405 | rc = convert_response(zdev, &ap_msg, crt->outputdata, |
406 | crt->outputdatalength); | |
af512ed0 RW |
407 | else |
408 | /* Signal pending. */ | |
963ed931 | 409 | ap_cancel_message(zdev->ap_dev, &ap_msg); |
963ed931 MS |
410 | out_free: |
411 | kfree(ap_msg.message); | |
412 | return rc; | |
413 | } | |
414 | ||
415 | /** | |
416 | * The crypto operations for a CEX2A card. | |
417 | */ | |
418 | static struct zcrypt_ops zcrypt_cex2a_ops = { | |
419 | .rsa_modexpo = zcrypt_cex2a_modexpo, | |
420 | .rsa_modexpo_crt = zcrypt_cex2a_modexpo_crt, | |
421 | }; | |
422 | ||
423 | /** | |
424 | * Probe function for CEX2A cards. It always accepts the AP device | |
425 | * since the bus_match already checked the hardware type. | |
426 | * @ap_dev: pointer to the AP device. | |
427 | */ | |
428 | static int zcrypt_cex2a_probe(struct ap_device *ap_dev) | |
429 | { | |
8e89b6be FB |
430 | struct zcrypt_device *zdev = NULL; |
431 | int rc = 0; | |
432 | ||
433 | switch (ap_dev->device_type) { | |
434 | case AP_DEVICE_TYPE_CEX2A: | |
435 | zdev = zcrypt_device_alloc(CEX2A_MAX_RESPONSE_SIZE); | |
436 | if (!zdev) | |
437 | return -ENOMEM; | |
438 | zdev->user_space_type = ZCRYPT_CEX2A; | |
439 | zdev->type_string = "CEX2A"; | |
440 | zdev->min_mod_size = CEX2A_MIN_MOD_SIZE; | |
441 | zdev->max_mod_size = CEX2A_MAX_MOD_SIZE; | |
442 | zdev->short_crt = 1; | |
443 | zdev->speed_rating = CEX2A_SPEED_RATING; | |
c2567f8f | 444 | zdev->max_exp_bit_length = CEX2A_MAX_MOD_SIZE; |
8e89b6be FB |
445 | break; |
446 | case AP_DEVICE_TYPE_CEX3A: | |
447 | zdev = zcrypt_device_alloc(CEX3A_MAX_RESPONSE_SIZE); | |
448 | if (!zdev) | |
449 | return -ENOMEM; | |
450 | zdev->user_space_type = ZCRYPT_CEX3A; | |
451 | zdev->type_string = "CEX3A"; | |
3e309a66 FB |
452 | zdev->min_mod_size = CEX2A_MIN_MOD_SIZE; |
453 | zdev->max_mod_size = CEX2A_MAX_MOD_SIZE; | |
c2567f8f FB |
454 | zdev->max_exp_bit_length = CEX2A_MAX_MOD_SIZE; |
455 | if (ap_4096_commands_available(ap_dev->qid)) { | |
3e309a66 | 456 | zdev->max_mod_size = CEX3A_MAX_MOD_SIZE; |
c2567f8f FB |
457 | zdev->max_exp_bit_length = CEX3A_MAX_MOD_SIZE; |
458 | } | |
8e89b6be FB |
459 | zdev->short_crt = 1; |
460 | zdev->speed_rating = CEX3A_SPEED_RATING; | |
461 | break; | |
462 | } | |
463 | if (zdev != NULL) { | |
464 | zdev->ap_dev = ap_dev; | |
465 | zdev->ops = &zcrypt_cex2a_ops; | |
466 | zdev->online = 1; | |
467 | ap_dev->reply = &zdev->reply; | |
468 | ap_dev->private = zdev; | |
469 | rc = zcrypt_device_register(zdev); | |
470 | } | |
471 | if (rc) { | |
472 | ap_dev->private = NULL; | |
473 | zcrypt_device_free(zdev); | |
474 | } | |
963ed931 MS |
475 | return rc; |
476 | } | |
477 | ||
478 | /** | |
479 | * This is called to remove the extended CEX2A driver information | |
480 | * if an AP device is removed. | |
481 | */ | |
482 | static void zcrypt_cex2a_remove(struct ap_device *ap_dev) | |
483 | { | |
484 | struct zcrypt_device *zdev = ap_dev->private; | |
485 | ||
486 | zcrypt_device_unregister(zdev); | |
487 | } | |
488 | ||
489 | int __init zcrypt_cex2a_init(void) | |
490 | { | |
491 | return ap_driver_register(&zcrypt_cex2a_driver, THIS_MODULE, "cex2a"); | |
492 | } | |
493 | ||
494 | void __exit zcrypt_cex2a_exit(void) | |
495 | { | |
496 | ap_driver_unregister(&zcrypt_cex2a_driver); | |
497 | } | |
498 | ||
499 | #ifndef CONFIG_ZCRYPT_MONOLITHIC | |
500 | module_init(zcrypt_cex2a_init); | |
501 | module_exit(zcrypt_cex2a_exit); | |
502 | #endif |