Commit | Line | Data |
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812141a9 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
5e55a488 HD |
2 | /* |
3 | * zcrypt 2.1.0 | |
4 | * | |
5 | * Copyright IBM Corp. 2001, 2012 | |
6 | * Author(s): Robert Burroughs | |
7 | * Eric Rossman (edrossma@us.ibm.com) | |
8 | * | |
9 | * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com) | |
10 | * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com> | |
11 | * Ralph Wuerthner <rwuerthn@de.ibm.com> | |
12 | * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com> | |
5e55a488 HD |
13 | */ |
14 | ||
91f3e3ea IT |
15 | #define KMSG_COMPONENT "zcrypt" |
16 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
17 | ||
5e55a488 HD |
18 | #include <linux/module.h> |
19 | #include <linux/slab.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/err.h> | |
22 | #include <linux/atomic.h> | |
23 | #include <linux/uaccess.h> | |
24 | ||
25 | #include "ap_bus.h" | |
26 | #include "zcrypt_api.h" | |
27 | #include "zcrypt_error.h" | |
28 | #include "zcrypt_msgtype50.h" | |
29 | ||
30 | #define CEX3A_MAX_MOD_SIZE 512 /* 4096 bits */ | |
31 | ||
32 | #define CEX2A_MAX_RESPONSE_SIZE 0x110 /* max outputdatalength + type80_hdr */ | |
33 | ||
34 | #define CEX3A_MAX_RESPONSE_SIZE 0x210 /* 512 bit modulus | |
35 | * (max outputdatalength) + | |
36 | * type80_hdr*/ | |
37 | ||
38 | MODULE_AUTHOR("IBM Corporation"); | |
39 | MODULE_DESCRIPTION("Cryptographic Accelerator (message type 50), " \ | |
40 | "Copyright IBM Corp. 2001, 2012"); | |
41 | MODULE_LICENSE("GPL"); | |
42 | ||
5e55a488 HD |
43 | /** |
44 | * The type 50 message family is associated with a CEX2A card. | |
45 | * | |
46 | * The four members of the family are described below. | |
47 | * | |
48 | * Note that all unsigned char arrays are right-justified and left-padded | |
49 | * with zeroes. | |
50 | * | |
51 | * Note that all reserved fields must be zeroes. | |
52 | */ | |
53 | struct type50_hdr { | |
54 | unsigned char reserved1; | |
55 | unsigned char msg_type_code; /* 0x50 */ | |
56 | unsigned short msg_len; | |
57 | unsigned char reserved2; | |
58 | unsigned char ignored; | |
59 | unsigned short reserved3; | |
60 | } __packed; | |
61 | ||
62 | #define TYPE50_TYPE_CODE 0x50 | |
63 | ||
64 | #define TYPE50_MEB1_FMT 0x0001 | |
65 | #define TYPE50_MEB2_FMT 0x0002 | |
66 | #define TYPE50_MEB3_FMT 0x0003 | |
67 | #define TYPE50_CRB1_FMT 0x0011 | |
68 | #define TYPE50_CRB2_FMT 0x0012 | |
69 | #define TYPE50_CRB3_FMT 0x0013 | |
70 | ||
71 | /* Mod-Exp, with a small modulus */ | |
72 | struct type50_meb1_msg { | |
73 | struct type50_hdr header; | |
74 | unsigned short keyblock_type; /* 0x0001 */ | |
75 | unsigned char reserved[6]; | |
76 | unsigned char exponent[128]; | |
77 | unsigned char modulus[128]; | |
78 | unsigned char message[128]; | |
79 | } __packed; | |
80 | ||
81 | /* Mod-Exp, with a large modulus */ | |
82 | struct type50_meb2_msg { | |
83 | struct type50_hdr header; | |
84 | unsigned short keyblock_type; /* 0x0002 */ | |
85 | unsigned char reserved[6]; | |
86 | unsigned char exponent[256]; | |
87 | unsigned char modulus[256]; | |
88 | unsigned char message[256]; | |
89 | } __packed; | |
90 | ||
91 | /* Mod-Exp, with a larger modulus */ | |
92 | struct type50_meb3_msg { | |
93 | struct type50_hdr header; | |
94 | unsigned short keyblock_type; /* 0x0003 */ | |
95 | unsigned char reserved[6]; | |
96 | unsigned char exponent[512]; | |
97 | unsigned char modulus[512]; | |
98 | unsigned char message[512]; | |
99 | } __packed; | |
100 | ||
101 | /* CRT, with a small modulus */ | |
102 | struct type50_crb1_msg { | |
103 | struct type50_hdr header; | |
104 | unsigned short keyblock_type; /* 0x0011 */ | |
105 | unsigned char reserved[6]; | |
106 | unsigned char p[64]; | |
107 | unsigned char q[64]; | |
108 | unsigned char dp[64]; | |
109 | unsigned char dq[64]; | |
110 | unsigned char u[64]; | |
111 | unsigned char message[128]; | |
112 | } __packed; | |
113 | ||
114 | /* CRT, with a large modulus */ | |
115 | struct type50_crb2_msg { | |
116 | struct type50_hdr header; | |
117 | unsigned short keyblock_type; /* 0x0012 */ | |
118 | unsigned char reserved[6]; | |
119 | unsigned char p[128]; | |
120 | unsigned char q[128]; | |
121 | unsigned char dp[128]; | |
122 | unsigned char dq[128]; | |
123 | unsigned char u[128]; | |
124 | unsigned char message[256]; | |
125 | } __packed; | |
126 | ||
127 | /* CRT, with a larger modulus */ | |
128 | struct type50_crb3_msg { | |
129 | struct type50_hdr header; | |
130 | unsigned short keyblock_type; /* 0x0013 */ | |
131 | unsigned char reserved[6]; | |
132 | unsigned char p[256]; | |
133 | unsigned char q[256]; | |
134 | unsigned char dp[256]; | |
135 | unsigned char dq[256]; | |
136 | unsigned char u[256]; | |
137 | unsigned char message[512]; | |
138 | } __packed; | |
139 | ||
140 | /** | |
141 | * The type 80 response family is associated with a CEX2A card. | |
142 | * | |
143 | * Note that all unsigned char arrays are right-justified and left-padded | |
144 | * with zeroes. | |
145 | * | |
146 | * Note that all reserved fields must be zeroes. | |
147 | */ | |
148 | ||
149 | #define TYPE80_RSP_CODE 0x80 | |
150 | ||
151 | struct type80_hdr { | |
152 | unsigned char reserved1; | |
153 | unsigned char type; /* 0x80 */ | |
154 | unsigned short len; | |
155 | unsigned char code; /* 0x00 */ | |
156 | unsigned char reserved2[3]; | |
157 | unsigned char reserved3[8]; | |
158 | } __packed; | |
159 | ||
34a15167 IT |
160 | unsigned int get_rsa_modex_fc(struct ica_rsa_modexpo *mex, int *fcode) |
161 | { | |
162 | ||
163 | if (!mex->inputdatalength) | |
164 | return -EINVAL; | |
165 | ||
166 | if (mex->inputdatalength <= 128) /* 1024 bit */ | |
167 | *fcode = MEX_1K; | |
168 | else if (mex->inputdatalength <= 256) /* 2048 bit */ | |
169 | *fcode = MEX_2K; | |
170 | else /* 4096 bit */ | |
171 | *fcode = MEX_4K; | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | unsigned int get_rsa_crt_fc(struct ica_rsa_modexpo_crt *crt, int *fcode) | |
177 | { | |
178 | ||
179 | if (!crt->inputdatalength) | |
180 | return -EINVAL; | |
181 | ||
182 | if (crt->inputdatalength <= 128) /* 1024 bit */ | |
183 | *fcode = CRT_1K; | |
184 | else if (crt->inputdatalength <= 256) /* 2048 bit */ | |
185 | *fcode = CRT_2K; | |
186 | else /* 4096 bit */ | |
187 | *fcode = CRT_4K; | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
5e55a488 HD |
192 | /** |
193 | * Convert a ICAMEX message to a type50 MEX message. | |
194 | * | |
e28d2af4 IT |
195 | * @zq: crypto queue pointer |
196 | * @ap_msg: crypto request pointer | |
5e55a488 HD |
197 | * @mex: pointer to user input data |
198 | * | |
199 | * Returns 0 on success or -EFAULT. | |
200 | */ | |
e28d2af4 | 201 | static int ICAMEX_msg_to_type50MEX_msg(struct zcrypt_queue *zq, |
5e55a488 HD |
202 | struct ap_message *ap_msg, |
203 | struct ica_rsa_modexpo *mex) | |
204 | { | |
205 | unsigned char *mod, *exp, *inp; | |
206 | int mod_len; | |
207 | ||
208 | mod_len = mex->inputdatalength; | |
209 | ||
210 | if (mod_len <= 128) { | |
211 | struct type50_meb1_msg *meb1 = ap_msg->message; | |
212 | memset(meb1, 0, sizeof(*meb1)); | |
213 | ap_msg->length = sizeof(*meb1); | |
214 | meb1->header.msg_type_code = TYPE50_TYPE_CODE; | |
215 | meb1->header.msg_len = sizeof(*meb1); | |
216 | meb1->keyblock_type = TYPE50_MEB1_FMT; | |
217 | mod = meb1->modulus + sizeof(meb1->modulus) - mod_len; | |
218 | exp = meb1->exponent + sizeof(meb1->exponent) - mod_len; | |
219 | inp = meb1->message + sizeof(meb1->message) - mod_len; | |
220 | } else if (mod_len <= 256) { | |
221 | struct type50_meb2_msg *meb2 = ap_msg->message; | |
222 | memset(meb2, 0, sizeof(*meb2)); | |
223 | ap_msg->length = sizeof(*meb2); | |
224 | meb2->header.msg_type_code = TYPE50_TYPE_CODE; | |
225 | meb2->header.msg_len = sizeof(*meb2); | |
226 | meb2->keyblock_type = TYPE50_MEB2_FMT; | |
227 | mod = meb2->modulus + sizeof(meb2->modulus) - mod_len; | |
228 | exp = meb2->exponent + sizeof(meb2->exponent) - mod_len; | |
229 | inp = meb2->message + sizeof(meb2->message) - mod_len; | |
76b31381 | 230 | } else if (mod_len <= 512) { |
5e55a488 HD |
231 | struct type50_meb3_msg *meb3 = ap_msg->message; |
232 | memset(meb3, 0, sizeof(*meb3)); | |
233 | ap_msg->length = sizeof(*meb3); | |
234 | meb3->header.msg_type_code = TYPE50_TYPE_CODE; | |
235 | meb3->header.msg_len = sizeof(*meb3); | |
236 | meb3->keyblock_type = TYPE50_MEB3_FMT; | |
237 | mod = meb3->modulus + sizeof(meb3->modulus) - mod_len; | |
238 | exp = meb3->exponent + sizeof(meb3->exponent) - mod_len; | |
239 | inp = meb3->message + sizeof(meb3->message) - mod_len; | |
76b31381 HF |
240 | } else |
241 | return -EINVAL; | |
5e55a488 HD |
242 | |
243 | if (copy_from_user(mod, mex->n_modulus, mod_len) || | |
244 | copy_from_user(exp, mex->b_key, mod_len) || | |
245 | copy_from_user(inp, mex->inputdata, mod_len)) | |
246 | return -EFAULT; | |
247 | return 0; | |
248 | } | |
249 | ||
250 | /** | |
251 | * Convert a ICACRT message to a type50 CRT message. | |
252 | * | |
e28d2af4 IT |
253 | * @zq: crypto queue pointer |
254 | * @ap_msg: crypto request pointer | |
5e55a488 HD |
255 | * @crt: pointer to user input data |
256 | * | |
257 | * Returns 0 on success or -EFAULT. | |
258 | */ | |
e28d2af4 | 259 | static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_queue *zq, |
5e55a488 HD |
260 | struct ap_message *ap_msg, |
261 | struct ica_rsa_modexpo_crt *crt) | |
262 | { | |
1e466fcf | 263 | int mod_len, short_len; |
5e55a488 HD |
264 | unsigned char *p, *q, *dp, *dq, *u, *inp; |
265 | ||
266 | mod_len = crt->inputdatalength; | |
1330a125 | 267 | short_len = (mod_len + 1) / 2; |
5e55a488 HD |
268 | |
269 | /* | |
1e466fcf IT |
270 | * CEX2A and CEX3A w/o FW update can handle requests up to |
271 | * 256 byte modulus (2k keys). | |
272 | * CEX3A with FW update and CEX4A cards are able to handle | |
273 | * 512 byte modulus (4k keys). | |
5e55a488 | 274 | */ |
1e466fcf | 275 | if (mod_len <= 128) { /* up to 1024 bit key size */ |
5e55a488 HD |
276 | struct type50_crb1_msg *crb1 = ap_msg->message; |
277 | memset(crb1, 0, sizeof(*crb1)); | |
278 | ap_msg->length = sizeof(*crb1); | |
279 | crb1->header.msg_type_code = TYPE50_TYPE_CODE; | |
280 | crb1->header.msg_len = sizeof(*crb1); | |
281 | crb1->keyblock_type = TYPE50_CRB1_FMT; | |
1e466fcf | 282 | p = crb1->p + sizeof(crb1->p) - short_len; |
5e55a488 | 283 | q = crb1->q + sizeof(crb1->q) - short_len; |
1e466fcf | 284 | dp = crb1->dp + sizeof(crb1->dp) - short_len; |
5e55a488 | 285 | dq = crb1->dq + sizeof(crb1->dq) - short_len; |
1e466fcf | 286 | u = crb1->u + sizeof(crb1->u) - short_len; |
5e55a488 | 287 | inp = crb1->message + sizeof(crb1->message) - mod_len; |
1e466fcf | 288 | } else if (mod_len <= 256) { /* up to 2048 bit key size */ |
5e55a488 HD |
289 | struct type50_crb2_msg *crb2 = ap_msg->message; |
290 | memset(crb2, 0, sizeof(*crb2)); | |
291 | ap_msg->length = sizeof(*crb2); | |
292 | crb2->header.msg_type_code = TYPE50_TYPE_CODE; | |
293 | crb2->header.msg_len = sizeof(*crb2); | |
294 | crb2->keyblock_type = TYPE50_CRB2_FMT; | |
1e466fcf | 295 | p = crb2->p + sizeof(crb2->p) - short_len; |
5e55a488 | 296 | q = crb2->q + sizeof(crb2->q) - short_len; |
1e466fcf | 297 | dp = crb2->dp + sizeof(crb2->dp) - short_len; |
5e55a488 | 298 | dq = crb2->dq + sizeof(crb2->dq) - short_len; |
1e466fcf | 299 | u = crb2->u + sizeof(crb2->u) - short_len; |
5e55a488 | 300 | inp = crb2->message + sizeof(crb2->message) - mod_len; |
1e466fcf | 301 | } else if ((mod_len <= 512) && /* up to 4096 bit key size */ |
e28d2af4 | 302 | (zq->zcard->max_mod_size == CEX3A_MAX_MOD_SIZE)) { |
5e55a488 HD |
303 | struct type50_crb3_msg *crb3 = ap_msg->message; |
304 | memset(crb3, 0, sizeof(*crb3)); | |
305 | ap_msg->length = sizeof(*crb3); | |
306 | crb3->header.msg_type_code = TYPE50_TYPE_CODE; | |
307 | crb3->header.msg_len = sizeof(*crb3); | |
308 | crb3->keyblock_type = TYPE50_CRB3_FMT; | |
1e466fcf | 309 | p = crb3->p + sizeof(crb3->p) - short_len; |
5e55a488 | 310 | q = crb3->q + sizeof(crb3->q) - short_len; |
1e466fcf | 311 | dp = crb3->dp + sizeof(crb3->dp) - short_len; |
5e55a488 | 312 | dq = crb3->dq + sizeof(crb3->dq) - short_len; |
1e466fcf | 313 | u = crb3->u + sizeof(crb3->u) - short_len; |
5e55a488 | 314 | inp = crb3->message + sizeof(crb3->message) - mod_len; |
1e466fcf IT |
315 | } else |
316 | return -EINVAL; | |
5e55a488 | 317 | |
1e466fcf IT |
318 | /* |
319 | * correct the offset of p, bp and mult_inv according zcrypt.h | |
320 | * block size right aligned (skip the first byte) | |
321 | */ | |
322 | if (copy_from_user(p, crt->np_prime + MSGTYPE_ADJUSTMENT, short_len) || | |
5e55a488 | 323 | copy_from_user(q, crt->nq_prime, short_len) || |
1e466fcf | 324 | copy_from_user(dp, crt->bp_key + MSGTYPE_ADJUSTMENT, short_len) || |
5e55a488 | 325 | copy_from_user(dq, crt->bq_key, short_len) || |
1e466fcf | 326 | copy_from_user(u, crt->u_mult_inv + MSGTYPE_ADJUSTMENT, short_len) || |
5e55a488 HD |
327 | copy_from_user(inp, crt->inputdata, mod_len)) |
328 | return -EFAULT; | |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
333 | /** | |
334 | * Copy results from a type 80 reply message back to user space. | |
335 | * | |
e28d2af4 | 336 | * @zq: crypto device pointer |
5e55a488 HD |
337 | * @reply: reply AP message. |
338 | * @data: pointer to user output data | |
339 | * @length: size of user output data | |
340 | * | |
341 | * Returns 0 on success or -EFAULT. | |
342 | */ | |
e28d2af4 | 343 | static int convert_type80(struct zcrypt_queue *zq, |
5e55a488 HD |
344 | struct ap_message *reply, |
345 | char __user *outputdata, | |
346 | unsigned int outputdatalength) | |
347 | { | |
348 | struct type80_hdr *t80h = reply->message; | |
349 | unsigned char *data; | |
350 | ||
351 | if (t80h->len < sizeof(*t80h) + outputdatalength) { | |
352 | /* The result is too short, the CEX2A card may not do that.. */ | |
e28d2af4 IT |
353 | zq->online = 0; |
354 | pr_err("Cryptographic device %02x.%04x failed and was set offline\n", | |
355 | AP_QID_CARD(zq->queue->qid), | |
356 | AP_QID_QUEUE(zq->queue->qid)); | |
cccd85bf HF |
357 | ZCRYPT_DBF(DBF_ERR, |
358 | "device=%02x.%04x code=0x%02x => online=0 rc=EAGAIN\n", | |
359 | AP_QID_CARD(zq->queue->qid), | |
360 | AP_QID_QUEUE(zq->queue->qid), | |
361 | t80h->code); | |
5e55a488 HD |
362 | return -EAGAIN; /* repeat the request on a different device. */ |
363 | } | |
e28d2af4 | 364 | if (zq->zcard->user_space_type == ZCRYPT_CEX2A) |
5e55a488 HD |
365 | BUG_ON(t80h->len > CEX2A_MAX_RESPONSE_SIZE); |
366 | else | |
367 | BUG_ON(t80h->len > CEX3A_MAX_RESPONSE_SIZE); | |
368 | data = reply->message + t80h->len - outputdatalength; | |
369 | if (copy_to_user(outputdata, data, outputdatalength)) | |
370 | return -EFAULT; | |
371 | return 0; | |
372 | } | |
373 | ||
e28d2af4 | 374 | static int convert_response(struct zcrypt_queue *zq, |
5e55a488 HD |
375 | struct ap_message *reply, |
376 | char __user *outputdata, | |
377 | unsigned int outputdatalength) | |
378 | { | |
379 | /* Response type byte is the second byte in the response. */ | |
cccd85bf HF |
380 | unsigned char rtype = ((unsigned char *) reply->message)[1]; |
381 | ||
382 | switch (rtype) { | |
5e55a488 HD |
383 | case TYPE82_RSP_CODE: |
384 | case TYPE88_RSP_CODE: | |
e28d2af4 | 385 | return convert_error(zq, reply); |
5e55a488 | 386 | case TYPE80_RSP_CODE: |
e28d2af4 | 387 | return convert_type80(zq, reply, |
5e55a488 HD |
388 | outputdata, outputdatalength); |
389 | default: /* Unknown response type, this should NEVER EVER happen */ | |
e28d2af4 IT |
390 | zq->online = 0; |
391 | pr_err("Cryptographic device %02x.%04x failed and was set offline\n", | |
392 | AP_QID_CARD(zq->queue->qid), | |
393 | AP_QID_QUEUE(zq->queue->qid)); | |
cccd85bf HF |
394 | ZCRYPT_DBF(DBF_ERR, |
395 | "device=%02x.%04x rtype=0x%02x => online=0 rc=EAGAIN\n", | |
396 | AP_QID_CARD(zq->queue->qid), | |
397 | AP_QID_QUEUE(zq->queue->qid), | |
398 | (unsigned int) rtype); | |
5e55a488 HD |
399 | return -EAGAIN; /* repeat the request on a different device. */ |
400 | } | |
401 | } | |
402 | ||
403 | /** | |
404 | * This function is called from the AP bus code after a crypto request | |
405 | * "msg" has finished with the reply message "reply". | |
406 | * It is called from tasklet context. | |
e28d2af4 | 407 | * @aq: pointer to the AP device |
5e55a488 HD |
408 | * @msg: pointer to the AP message |
409 | * @reply: pointer to the AP reply message | |
410 | */ | |
e28d2af4 | 411 | static void zcrypt_cex2a_receive(struct ap_queue *aq, |
5e55a488 HD |
412 | struct ap_message *msg, |
413 | struct ap_message *reply) | |
414 | { | |
415 | static struct error_hdr error_reply = { | |
416 | .type = TYPE82_RSP_CODE, | |
417 | .reply_code = REP82_ERROR_MACHINE_FAILURE, | |
418 | }; | |
419 | struct type80_hdr *t80h; | |
420 | int length; | |
421 | ||
422 | /* Copy the reply message to the request message buffer. */ | |
f58fe336 MS |
423 | if (!reply) |
424 | goto out; /* ap_msg->rc indicates the error */ | |
5e55a488 HD |
425 | t80h = reply->message; |
426 | if (t80h->type == TYPE80_RSP_CODE) { | |
e28d2af4 | 427 | if (aq->ap_dev.device_type == AP_DEVICE_TYPE_CEX2A) |
5e55a488 HD |
428 | length = min_t(int, |
429 | CEX2A_MAX_RESPONSE_SIZE, t80h->len); | |
430 | else | |
431 | length = min_t(int, | |
432 | CEX3A_MAX_RESPONSE_SIZE, t80h->len); | |
433 | memcpy(msg->message, reply->message, length); | |
434 | } else | |
435 | memcpy(msg->message, reply->message, sizeof(error_reply)); | |
436 | out: | |
437 | complete((struct completion *) msg->private); | |
438 | } | |
439 | ||
440 | static atomic_t zcrypt_step = ATOMIC_INIT(0); | |
441 | ||
442 | /** | |
443 | * The request distributor calls this function if it picked the CEX2A | |
444 | * device to handle a modexpo request. | |
e28d2af4 | 445 | * @zq: pointer to zcrypt_queue structure that identifies the |
5e55a488 HD |
446 | * CEX2A device to the request distributor |
447 | * @mex: pointer to the modexpo request buffer | |
448 | */ | |
e28d2af4 | 449 | static long zcrypt_cex2a_modexpo(struct zcrypt_queue *zq, |
5e55a488 HD |
450 | struct ica_rsa_modexpo *mex) |
451 | { | |
452 | struct ap_message ap_msg; | |
453 | struct completion work; | |
454 | int rc; | |
455 | ||
456 | ap_init_message(&ap_msg); | |
e28d2af4 | 457 | if (zq->zcard->user_space_type == ZCRYPT_CEX2A) |
5e55a488 HD |
458 | ap_msg.message = kmalloc(MSGTYPE50_CRB2_MAX_MSG_SIZE, |
459 | GFP_KERNEL); | |
460 | else | |
461 | ap_msg.message = kmalloc(MSGTYPE50_CRB3_MAX_MSG_SIZE, | |
462 | GFP_KERNEL); | |
463 | if (!ap_msg.message) | |
464 | return -ENOMEM; | |
465 | ap_msg.receive = zcrypt_cex2a_receive; | |
466 | ap_msg.psmid = (((unsigned long long) current->pid) << 32) + | |
467 | atomic_inc_return(&zcrypt_step); | |
468 | ap_msg.private = &work; | |
e28d2af4 | 469 | rc = ICAMEX_msg_to_type50MEX_msg(zq, &ap_msg, mex); |
5e55a488 HD |
470 | if (rc) |
471 | goto out_free; | |
472 | init_completion(&work); | |
e28d2af4 | 473 | ap_queue_message(zq->queue, &ap_msg); |
5e55a488 | 474 | rc = wait_for_completion_interruptible(&work); |
f58fe336 MS |
475 | if (rc == 0) { |
476 | rc = ap_msg.rc; | |
477 | if (rc == 0) | |
e28d2af4 | 478 | rc = convert_response(zq, &ap_msg, mex->outputdata, |
f58fe336 MS |
479 | mex->outputdatalength); |
480 | } else | |
5e55a488 | 481 | /* Signal pending. */ |
e28d2af4 | 482 | ap_cancel_message(zq->queue, &ap_msg); |
5e55a488 HD |
483 | out_free: |
484 | kfree(ap_msg.message); | |
485 | return rc; | |
486 | } | |
487 | ||
488 | /** | |
489 | * The request distributor calls this function if it picked the CEX2A | |
490 | * device to handle a modexpo_crt request. | |
e28d2af4 | 491 | * @zq: pointer to zcrypt_queue structure that identifies the |
5e55a488 HD |
492 | * CEX2A device to the request distributor |
493 | * @crt: pointer to the modexpoc_crt request buffer | |
494 | */ | |
e28d2af4 | 495 | static long zcrypt_cex2a_modexpo_crt(struct zcrypt_queue *zq, |
5e55a488 HD |
496 | struct ica_rsa_modexpo_crt *crt) |
497 | { | |
498 | struct ap_message ap_msg; | |
499 | struct completion work; | |
500 | int rc; | |
501 | ||
502 | ap_init_message(&ap_msg); | |
e28d2af4 | 503 | if (zq->zcard->user_space_type == ZCRYPT_CEX2A) |
5e55a488 HD |
504 | ap_msg.message = kmalloc(MSGTYPE50_CRB2_MAX_MSG_SIZE, |
505 | GFP_KERNEL); | |
506 | else | |
507 | ap_msg.message = kmalloc(MSGTYPE50_CRB3_MAX_MSG_SIZE, | |
508 | GFP_KERNEL); | |
509 | if (!ap_msg.message) | |
510 | return -ENOMEM; | |
511 | ap_msg.receive = zcrypt_cex2a_receive; | |
512 | ap_msg.psmid = (((unsigned long long) current->pid) << 32) + | |
513 | atomic_inc_return(&zcrypt_step); | |
514 | ap_msg.private = &work; | |
e28d2af4 | 515 | rc = ICACRT_msg_to_type50CRT_msg(zq, &ap_msg, crt); |
5e55a488 HD |
516 | if (rc) |
517 | goto out_free; | |
518 | init_completion(&work); | |
e28d2af4 | 519 | ap_queue_message(zq->queue, &ap_msg); |
5e55a488 | 520 | rc = wait_for_completion_interruptible(&work); |
f58fe336 MS |
521 | if (rc == 0) { |
522 | rc = ap_msg.rc; | |
523 | if (rc == 0) | |
e28d2af4 | 524 | rc = convert_response(zq, &ap_msg, crt->outputdata, |
f58fe336 MS |
525 | crt->outputdatalength); |
526 | } else | |
5e55a488 | 527 | /* Signal pending. */ |
e28d2af4 | 528 | ap_cancel_message(zq->queue, &ap_msg); |
5e55a488 HD |
529 | out_free: |
530 | kfree(ap_msg.message); | |
531 | return rc; | |
532 | } | |
533 | ||
534 | /** | |
535 | * The crypto operations for message type 50. | |
536 | */ | |
537 | static struct zcrypt_ops zcrypt_msgtype50_ops = { | |
538 | .rsa_modexpo = zcrypt_cex2a_modexpo, | |
539 | .rsa_modexpo_crt = zcrypt_cex2a_modexpo_crt, | |
540 | .owner = THIS_MODULE, | |
121a868d | 541 | .name = MSGTYPE50_NAME, |
5e55a488 HD |
542 | .variant = MSGTYPE50_VARIANT_DEFAULT, |
543 | }; | |
544 | ||
fc1d3f02 | 545 | void __init zcrypt_msgtype50_init(void) |
5e55a488 HD |
546 | { |
547 | zcrypt_msgtype_register(&zcrypt_msgtype50_ops); | |
5e55a488 HD |
548 | } |
549 | ||
550 | void __exit zcrypt_msgtype50_exit(void) | |
551 | { | |
552 | zcrypt_msgtype_unregister(&zcrypt_msgtype50_ops); | |
553 | } |