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[brcm63xx] rename 96348GW-1{0,1}-gen to 96348GW-1{0,1}-generic
[openwrt.git] / target / linux / generic / files / crypto / ocf / ixp4xx / ixp4xx.c
1 /*
2 * An OCF module that uses Intels IXP CryptACC API to do the crypto.
3 * This driver requires the IXP400 Access Library that is available
4 * from Intel in order to operate (or compile).
5 *
6 * Written by David McCullough <david_mccullough@mcafee.com>
7 * Copyright (C) 2006-2011 David McCullough
8 * Copyright (C) 2004-2005 Intel Corporation.
9 *
10 * LICENSE TERMS
11 *
12 * The free distribution and use of this software in both source and binary
13 * form is allowed (with or without changes) provided that:
14 *
15 * 1. distributions of this source code include the above copyright
16 * notice, this list of conditions and the following disclaimer;
17 *
18 * 2. distributions in binary form include the above copyright
19 * notice, this list of conditions and the following disclaimer
20 * in the documentation and/or other associated materials;
21 *
22 * 3. the copyright holder's name is not used to endorse products
23 * built using this software without specific written permission.
24 *
25 * ALTERNATIVELY, provided that this notice is retained in full, this product
26 * may be distributed under the terms of the GNU General Public License (GPL),
27 * in which case the provisions of the GPL apply INSTEAD OF those given above.
28 *
29 * DISCLAIMER
30 *
31 * This software is provided 'as is' with no explicit or implied warranties
32 * in respect of its properties, including, but not limited to, correctness
33 * and/or fitness for purpose.
34 */
35
36 #include <linux/version.h>
37 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38) && !defined(AUTOCONF_INCLUDED)
38 #include <linux/config.h>
39 #endif
40 #include <linux/module.h>
41 #include <linux/init.h>
42 #include <linux/list.h>
43 #include <linux/slab.h>
44 #include <linux/sched.h>
45 #include <linux/wait.h>
46 #include <linux/crypto.h>
47 #include <linux/interrupt.h>
48 #include <asm/scatterlist.h>
49
50 #include <IxTypes.h>
51 #include <IxOsBuffMgt.h>
52 #include <IxNpeDl.h>
53 #include <IxCryptoAcc.h>
54 #include <IxQMgr.h>
55 #include <IxOsServices.h>
56 #include <IxOsCacheMMU.h>
57
58 #include <cryptodev.h>
59 #include <uio.h>
60
61 #ifndef IX_MBUF_PRIV
62 #define IX_MBUF_PRIV(x) ((x)->priv)
63 #endif
64
65 struct ixp_data;
66
67 struct ixp_q {
68 struct list_head ixp_q_list;
69 struct ixp_data *ixp_q_data;
70 struct cryptop *ixp_q_crp;
71 struct cryptodesc *ixp_q_ccrd;
72 struct cryptodesc *ixp_q_acrd;
73 IX_MBUF ixp_q_mbuf;
74 UINT8 *ixp_hash_dest; /* Location for hash in client buffer */
75 UINT8 *ixp_hash_src; /* Location of hash in internal buffer */
76 unsigned char ixp_q_iv_data[IX_CRYPTO_ACC_MAX_CIPHER_IV_LENGTH];
77 unsigned char *ixp_q_iv;
78 };
79
80 struct ixp_data {
81 int ixp_registered; /* is the context registered */
82 int ixp_crd_flags; /* detect direction changes */
83
84 int ixp_cipher_alg;
85 int ixp_auth_alg;
86
87 UINT32 ixp_ctx_id;
88 UINT32 ixp_hash_key_id; /* used when hashing */
89 IxCryptoAccCtx ixp_ctx;
90 IX_MBUF ixp_pri_mbuf;
91 IX_MBUF ixp_sec_mbuf;
92
93 struct work_struct ixp_pending_work;
94 struct work_struct ixp_registration_work;
95 struct list_head ixp_q; /* unprocessed requests */
96 };
97
98 #ifdef __ixp46X
99
100 #define MAX_IOP_SIZE 64 /* words */
101 #define MAX_OOP_SIZE 128
102
103 #define MAX_PARAMS 3
104
105 struct ixp_pkq {
106 struct list_head pkq_list;
107 struct cryptkop *pkq_krp;
108
109 IxCryptoAccPkeEauInOperands pkq_op;
110 IxCryptoAccPkeEauOpResult pkq_result;
111
112 UINT32 pkq_ibuf0[MAX_IOP_SIZE];
113 UINT32 pkq_ibuf1[MAX_IOP_SIZE];
114 UINT32 pkq_ibuf2[MAX_IOP_SIZE];
115 UINT32 pkq_obuf[MAX_OOP_SIZE];
116 };
117
118 static LIST_HEAD(ixp_pkq); /* current PK wait list */
119 static struct ixp_pkq *ixp_pk_cur;
120 static spinlock_t ixp_pkq_lock;
121
122 #endif /* __ixp46X */
123
124 static int ixp_blocked = 0;
125
126 static int32_t ixp_id = -1;
127 static struct ixp_data **ixp_sessions = NULL;
128 static u_int32_t ixp_sesnum = 0;
129
130 static int ixp_process(device_t, struct cryptop *, int);
131 static int ixp_newsession(device_t, u_int32_t *, struct cryptoini *);
132 static int ixp_freesession(device_t, u_int64_t);
133 #ifdef __ixp46X
134 static int ixp_kprocess(device_t, struct cryptkop *krp, int hint);
135 #endif
136
137 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
138 static kmem_cache_t *qcache;
139 #else
140 static struct kmem_cache *qcache;
141 #endif
142
143 #define debug ixp_debug
144 static int ixp_debug = 0;
145 module_param(ixp_debug, int, 0644);
146 MODULE_PARM_DESC(ixp_debug, "Enable debug");
147
148 static int ixp_init_crypto = 1;
149 module_param(ixp_init_crypto, int, 0444); /* RO after load/boot */
150 MODULE_PARM_DESC(ixp_init_crypto, "Call ixCryptoAccInit (default is 1)");
151
152 static void ixp_process_pending(void *arg);
153 static void ixp_registration(void *arg);
154 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
155 static void ixp_process_pending_wq(struct work_struct *work);
156 static void ixp_registration_wq(struct work_struct *work);
157 #endif
158
159 /*
160 * dummy device structure
161 */
162
163 static struct {
164 softc_device_decl sc_dev;
165 } ixpdev;
166
167 static device_method_t ixp_methods = {
168 /* crypto device methods */
169 DEVMETHOD(cryptodev_newsession, ixp_newsession),
170 DEVMETHOD(cryptodev_freesession,ixp_freesession),
171 DEVMETHOD(cryptodev_process, ixp_process),
172 #ifdef __ixp46X
173 DEVMETHOD(cryptodev_kprocess, ixp_kprocess),
174 #endif
175 };
176
177 /*
178 * Generate a new software session.
179 */
180 static int
181 ixp_newsession(device_t dev, u_int32_t *sid, struct cryptoini *cri)
182 {
183 struct ixp_data *ixp;
184 u_int32_t i;
185 #define AUTH_LEN(cri, def) \
186 (cri->cri_mlen ? cri->cri_mlen : (def))
187
188 dprintk("%s():alg %d\n", __FUNCTION__,cri->cri_alg);
189 if (sid == NULL || cri == NULL) {
190 dprintk("%s,%d - EINVAL\n", __FILE__, __LINE__);
191 return EINVAL;
192 }
193
194 if (ixp_sessions) {
195 for (i = 1; i < ixp_sesnum; i++)
196 if (ixp_sessions[i] == NULL)
197 break;
198 } else
199 i = 1; /* NB: to silence compiler warning */
200
201 if (ixp_sessions == NULL || i == ixp_sesnum) {
202 struct ixp_data **ixpd;
203
204 if (ixp_sessions == NULL) {
205 i = 1; /* We leave ixp_sessions[0] empty */
206 ixp_sesnum = CRYPTO_SW_SESSIONS;
207 } else
208 ixp_sesnum *= 2;
209
210 ixpd = kmalloc(ixp_sesnum * sizeof(struct ixp_data *), SLAB_ATOMIC);
211 if (ixpd == NULL) {
212 /* Reset session number */
213 if (ixp_sesnum == CRYPTO_SW_SESSIONS)
214 ixp_sesnum = 0;
215 else
216 ixp_sesnum /= 2;
217 dprintk("%s,%d: ENOBUFS\n", __FILE__, __LINE__);
218 return ENOBUFS;
219 }
220 memset(ixpd, 0, ixp_sesnum * sizeof(struct ixp_data *));
221
222 /* Copy existing sessions */
223 if (ixp_sessions) {
224 memcpy(ixpd, ixp_sessions,
225 (ixp_sesnum / 2) * sizeof(struct ixp_data *));
226 kfree(ixp_sessions);
227 }
228
229 ixp_sessions = ixpd;
230 }
231
232 ixp_sessions[i] = (struct ixp_data *) kmalloc(sizeof(struct ixp_data),
233 SLAB_ATOMIC);
234 if (ixp_sessions[i] == NULL) {
235 ixp_freesession(NULL, i);
236 dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
237 return ENOBUFS;
238 }
239
240 *sid = i;
241
242 ixp = ixp_sessions[i];
243 memset(ixp, 0, sizeof(*ixp));
244
245 ixp->ixp_cipher_alg = -1;
246 ixp->ixp_auth_alg = -1;
247 ixp->ixp_ctx_id = -1;
248 INIT_LIST_HEAD(&ixp->ixp_q);
249
250 ixp->ixp_ctx.useDifferentSrcAndDestMbufs = 0;
251
252 while (cri) {
253 switch (cri->cri_alg) {
254 case CRYPTO_DES_CBC:
255 ixp->ixp_cipher_alg = cri->cri_alg;
256 ixp->ixp_ctx.cipherCtx.cipherAlgo = IX_CRYPTO_ACC_CIPHER_DES;
257 ixp->ixp_ctx.cipherCtx.cipherMode = IX_CRYPTO_ACC_MODE_CBC;
258 ixp->ixp_ctx.cipherCtx.cipherKeyLen = (cri->cri_klen + 7) / 8;
259 ixp->ixp_ctx.cipherCtx.cipherBlockLen = IX_CRYPTO_ACC_DES_BLOCK_64;
260 ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen =
261 IX_CRYPTO_ACC_DES_IV_64;
262 memcpy(ixp->ixp_ctx.cipherCtx.key.cipherKey,
263 cri->cri_key, (cri->cri_klen + 7) / 8);
264 break;
265
266 case CRYPTO_3DES_CBC:
267 ixp->ixp_cipher_alg = cri->cri_alg;
268 ixp->ixp_ctx.cipherCtx.cipherAlgo = IX_CRYPTO_ACC_CIPHER_3DES;
269 ixp->ixp_ctx.cipherCtx.cipherMode = IX_CRYPTO_ACC_MODE_CBC;
270 ixp->ixp_ctx.cipherCtx.cipherKeyLen = (cri->cri_klen + 7) / 8;
271 ixp->ixp_ctx.cipherCtx.cipherBlockLen = IX_CRYPTO_ACC_DES_BLOCK_64;
272 ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen =
273 IX_CRYPTO_ACC_DES_IV_64;
274 memcpy(ixp->ixp_ctx.cipherCtx.key.cipherKey,
275 cri->cri_key, (cri->cri_klen + 7) / 8);
276 break;
277
278 case CRYPTO_RIJNDAEL128_CBC:
279 ixp->ixp_cipher_alg = cri->cri_alg;
280 ixp->ixp_ctx.cipherCtx.cipherAlgo = IX_CRYPTO_ACC_CIPHER_AES;
281 ixp->ixp_ctx.cipherCtx.cipherMode = IX_CRYPTO_ACC_MODE_CBC;
282 ixp->ixp_ctx.cipherCtx.cipherKeyLen = (cri->cri_klen + 7) / 8;
283 ixp->ixp_ctx.cipherCtx.cipherBlockLen = 16;
284 ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen = 16;
285 memcpy(ixp->ixp_ctx.cipherCtx.key.cipherKey,
286 cri->cri_key, (cri->cri_klen + 7) / 8);
287 break;
288
289 case CRYPTO_MD5:
290 case CRYPTO_MD5_HMAC:
291 ixp->ixp_auth_alg = cri->cri_alg;
292 ixp->ixp_ctx.authCtx.authAlgo = IX_CRYPTO_ACC_AUTH_MD5;
293 ixp->ixp_ctx.authCtx.authDigestLen = AUTH_LEN(cri, MD5_HASH_LEN);
294 ixp->ixp_ctx.authCtx.aadLen = 0;
295 /* Only MD5_HMAC needs a key */
296 if (cri->cri_alg == CRYPTO_MD5_HMAC) {
297 ixp->ixp_ctx.authCtx.authKeyLen = (cri->cri_klen + 7) / 8;
298 if (ixp->ixp_ctx.authCtx.authKeyLen >
299 sizeof(ixp->ixp_ctx.authCtx.key.authKey)) {
300 printk(
301 "ixp4xx: Invalid key length for MD5_HMAC - %d bits\n",
302 cri->cri_klen);
303 ixp_freesession(NULL, i);
304 return EINVAL;
305 }
306 memcpy(ixp->ixp_ctx.authCtx.key.authKey,
307 cri->cri_key, (cri->cri_klen + 7) / 8);
308 }
309 break;
310
311 case CRYPTO_SHA1:
312 case CRYPTO_SHA1_HMAC:
313 ixp->ixp_auth_alg = cri->cri_alg;
314 ixp->ixp_ctx.authCtx.authAlgo = IX_CRYPTO_ACC_AUTH_SHA1;
315 ixp->ixp_ctx.authCtx.authDigestLen = AUTH_LEN(cri, SHA1_HASH_LEN);
316 ixp->ixp_ctx.authCtx.aadLen = 0;
317 /* Only SHA1_HMAC needs a key */
318 if (cri->cri_alg == CRYPTO_SHA1_HMAC) {
319 ixp->ixp_ctx.authCtx.authKeyLen = (cri->cri_klen + 7) / 8;
320 if (ixp->ixp_ctx.authCtx.authKeyLen >
321 sizeof(ixp->ixp_ctx.authCtx.key.authKey)) {
322 printk(
323 "ixp4xx: Invalid key length for SHA1_HMAC - %d bits\n",
324 cri->cri_klen);
325 ixp_freesession(NULL, i);
326 return EINVAL;
327 }
328 memcpy(ixp->ixp_ctx.authCtx.key.authKey,
329 cri->cri_key, (cri->cri_klen + 7) / 8);
330 }
331 break;
332
333 default:
334 printk("ixp: unknown algo 0x%x\n", cri->cri_alg);
335 ixp_freesession(NULL, i);
336 return EINVAL;
337 }
338 cri = cri->cri_next;
339 }
340
341 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
342 INIT_WORK(&ixp->ixp_pending_work, ixp_process_pending_wq);
343 INIT_WORK(&ixp->ixp_registration_work, ixp_registration_wq);
344 #else
345 INIT_WORK(&ixp->ixp_pending_work, ixp_process_pending, ixp);
346 INIT_WORK(&ixp->ixp_registration_work, ixp_registration, ixp);
347 #endif
348
349 return 0;
350 }
351
352
353 /*
354 * Free a session.
355 */
356 static int
357 ixp_freesession(device_t dev, u_int64_t tid)
358 {
359 u_int32_t sid = CRYPTO_SESID2LID(tid);
360
361 dprintk("%s()\n", __FUNCTION__);
362 if (sid > ixp_sesnum || ixp_sessions == NULL ||
363 ixp_sessions[sid] == NULL) {
364 dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
365 return EINVAL;
366 }
367
368 /* Silently accept and return */
369 if (sid == 0)
370 return 0;
371
372 if (ixp_sessions[sid]) {
373 if (ixp_sessions[sid]->ixp_ctx_id != -1) {
374 ixCryptoAccCtxUnregister(ixp_sessions[sid]->ixp_ctx_id);
375 ixp_sessions[sid]->ixp_ctx_id = -1;
376 }
377 kfree(ixp_sessions[sid]);
378 }
379 ixp_sessions[sid] = NULL;
380 if (ixp_blocked) {
381 ixp_blocked = 0;
382 crypto_unblock(ixp_id, CRYPTO_SYMQ);
383 }
384 return 0;
385 }
386
387
388 /*
389 * callback for when hash processing is complete
390 */
391
392 static void
393 ixp_hash_perform_cb(
394 UINT32 hash_key_id,
395 IX_MBUF *bufp,
396 IxCryptoAccStatus status)
397 {
398 struct ixp_q *q;
399
400 dprintk("%s(%u, %p, 0x%x)\n", __FUNCTION__, hash_key_id, bufp, status);
401
402 if (bufp == NULL) {
403 printk("ixp: NULL buf in %s\n", __FUNCTION__);
404 return;
405 }
406
407 q = IX_MBUF_PRIV(bufp);
408 if (q == NULL) {
409 printk("ixp: NULL priv in %s\n", __FUNCTION__);
410 return;
411 }
412
413 if (status == IX_CRYPTO_ACC_STATUS_SUCCESS) {
414 /* On success, need to copy hash back into original client buffer */
415 memcpy(q->ixp_hash_dest, q->ixp_hash_src,
416 (q->ixp_q_data->ixp_auth_alg == CRYPTO_SHA1) ?
417 SHA1_HASH_LEN : MD5_HASH_LEN);
418 }
419 else {
420 printk("ixp: hash perform failed status=%d\n", status);
421 q->ixp_q_crp->crp_etype = EINVAL;
422 }
423
424 /* Free internal buffer used for hashing */
425 kfree(IX_MBUF_MDATA(&q->ixp_q_mbuf));
426
427 crypto_done(q->ixp_q_crp);
428 kmem_cache_free(qcache, q);
429 }
430
431 /*
432 * setup a request and perform it
433 */
434 static void
435 ixp_q_process(struct ixp_q *q)
436 {
437 IxCryptoAccStatus status;
438 struct ixp_data *ixp = q->ixp_q_data;
439 int auth_off = 0;
440 int auth_len = 0;
441 int crypt_off = 0;
442 int crypt_len = 0;
443 int icv_off = 0;
444 char *crypt_func;
445
446 dprintk("%s(%p)\n", __FUNCTION__, q);
447
448 if (q->ixp_q_ccrd) {
449 if (q->ixp_q_ccrd->crd_flags & CRD_F_ENCRYPT) {
450 if (q->ixp_q_ccrd->crd_flags & CRD_F_IV_EXPLICIT) {
451 q->ixp_q_iv = q->ixp_q_ccrd->crd_iv;
452 } else {
453 q->ixp_q_iv = q->ixp_q_iv_data;
454 read_random(q->ixp_q_iv, ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen);
455 }
456 if ((q->ixp_q_ccrd->crd_flags & CRD_F_IV_PRESENT) == 0)
457 crypto_copyback(q->ixp_q_crp->crp_flags, q->ixp_q_crp->crp_buf,
458 q->ixp_q_ccrd->crd_inject,
459 ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen,
460 (caddr_t) q->ixp_q_iv);
461 } else {
462 if (q->ixp_q_ccrd->crd_flags & CRD_F_IV_EXPLICIT)
463 q->ixp_q_iv = q->ixp_q_ccrd->crd_iv;
464 else {
465 q->ixp_q_iv = q->ixp_q_iv_data;
466 crypto_copydata(q->ixp_q_crp->crp_flags, q->ixp_q_crp->crp_buf,
467 q->ixp_q_ccrd->crd_inject,
468 ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen,
469 (caddr_t) q->ixp_q_iv);
470 }
471 }
472
473 if (q->ixp_q_acrd) {
474 auth_off = q->ixp_q_acrd->crd_skip;
475 auth_len = q->ixp_q_acrd->crd_len;
476 icv_off = q->ixp_q_acrd->crd_inject;
477 }
478
479 crypt_off = q->ixp_q_ccrd->crd_skip;
480 crypt_len = q->ixp_q_ccrd->crd_len;
481 } else { /* if (q->ixp_q_acrd) */
482 auth_off = q->ixp_q_acrd->crd_skip;
483 auth_len = q->ixp_q_acrd->crd_len;
484 icv_off = q->ixp_q_acrd->crd_inject;
485 }
486
487 if (q->ixp_q_crp->crp_flags & CRYPTO_F_SKBUF) {
488 struct sk_buff *skb = (struct sk_buff *) q->ixp_q_crp->crp_buf;
489 if (skb_shinfo(skb)->nr_frags) {
490 /*
491 * DAVIDM fix this limitation one day by using
492 * a buffer pool and chaining, it is not currently
493 * needed for current user/kernel space acceleration
494 */
495 printk("ixp: Cannot handle fragmented skb's yet !\n");
496 q->ixp_q_crp->crp_etype = ENOENT;
497 goto done;
498 }
499 IX_MBUF_MLEN(&q->ixp_q_mbuf) =
500 IX_MBUF_PKT_LEN(&q->ixp_q_mbuf) = skb->len;
501 IX_MBUF_MDATA(&q->ixp_q_mbuf) = skb->data;
502 } else if (q->ixp_q_crp->crp_flags & CRYPTO_F_IOV) {
503 struct uio *uiop = (struct uio *) q->ixp_q_crp->crp_buf;
504 if (uiop->uio_iovcnt != 1) {
505 /*
506 * DAVIDM fix this limitation one day by using
507 * a buffer pool and chaining, it is not currently
508 * needed for current user/kernel space acceleration
509 */
510 printk("ixp: Cannot handle more than 1 iovec yet !\n");
511 q->ixp_q_crp->crp_etype = ENOENT;
512 goto done;
513 }
514 IX_MBUF_MLEN(&q->ixp_q_mbuf) =
515 IX_MBUF_PKT_LEN(&q->ixp_q_mbuf) = uiop->uio_iov[0].iov_len;
516 IX_MBUF_MDATA(&q->ixp_q_mbuf) = uiop->uio_iov[0].iov_base;
517 } else /* contig buffer */ {
518 IX_MBUF_MLEN(&q->ixp_q_mbuf) =
519 IX_MBUF_PKT_LEN(&q->ixp_q_mbuf) = q->ixp_q_crp->crp_ilen;
520 IX_MBUF_MDATA(&q->ixp_q_mbuf) = q->ixp_q_crp->crp_buf;
521 }
522
523 IX_MBUF_PRIV(&q->ixp_q_mbuf) = q;
524
525 if (ixp->ixp_auth_alg == CRYPTO_SHA1 || ixp->ixp_auth_alg == CRYPTO_MD5) {
526 /*
527 * For SHA1 and MD5 hash, need to create an internal buffer that is big
528 * enough to hold the original data + the appropriate padding for the
529 * hash algorithm.
530 */
531 UINT8 *tbuf = NULL;
532
533 IX_MBUF_MLEN(&q->ixp_q_mbuf) = IX_MBUF_PKT_LEN(&q->ixp_q_mbuf) =
534 ((IX_MBUF_MLEN(&q->ixp_q_mbuf) * 8) + 72 + 511) / 8;
535 tbuf = kmalloc(IX_MBUF_MLEN(&q->ixp_q_mbuf), SLAB_ATOMIC);
536
537 if (IX_MBUF_MDATA(&q->ixp_q_mbuf) == NULL) {
538 printk("ixp: kmalloc(%u, SLAB_ATOMIC) failed\n",
539 IX_MBUF_MLEN(&q->ixp_q_mbuf));
540 q->ixp_q_crp->crp_etype = ENOMEM;
541 goto done;
542 }
543 memcpy(tbuf, &(IX_MBUF_MDATA(&q->ixp_q_mbuf))[auth_off], auth_len);
544
545 /* Set location in client buffer to copy hash into */
546 q->ixp_hash_dest =
547 &(IX_MBUF_MDATA(&q->ixp_q_mbuf))[auth_off + auth_len];
548
549 IX_MBUF_MDATA(&q->ixp_q_mbuf) = tbuf;
550
551 /* Set location in internal buffer for where hash starts */
552 q->ixp_hash_src = &(IX_MBUF_MDATA(&q->ixp_q_mbuf))[auth_len];
553
554 crypt_func = "ixCryptoAccHashPerform";
555 status = ixCryptoAccHashPerform(ixp->ixp_ctx.authCtx.authAlgo,
556 &q->ixp_q_mbuf, ixp_hash_perform_cb, 0, auth_len, auth_len,
557 &ixp->ixp_hash_key_id);
558 }
559 else {
560 crypt_func = "ixCryptoAccAuthCryptPerform";
561 status = ixCryptoAccAuthCryptPerform(ixp->ixp_ctx_id, &q->ixp_q_mbuf,
562 NULL, auth_off, auth_len, crypt_off, crypt_len, icv_off,
563 q->ixp_q_iv);
564 }
565
566 if (IX_CRYPTO_ACC_STATUS_SUCCESS == status)
567 return;
568
569 if (IX_CRYPTO_ACC_STATUS_QUEUE_FULL == status) {
570 q->ixp_q_crp->crp_etype = ENOMEM;
571 goto done;
572 }
573
574 printk("ixp: %s failed %u\n", crypt_func, status);
575 q->ixp_q_crp->crp_etype = EINVAL;
576
577 done:
578 crypto_done(q->ixp_q_crp);
579 kmem_cache_free(qcache, q);
580 }
581
582
583 /*
584 * because we cannot process the Q from the Register callback
585 * we do it here on a task Q.
586 */
587
588 static void
589 ixp_process_pending(void *arg)
590 {
591 struct ixp_data *ixp = arg;
592 struct ixp_q *q = NULL;
593
594 dprintk("%s(%p)\n", __FUNCTION__, arg);
595
596 if (!ixp)
597 return;
598
599 while (!list_empty(&ixp->ixp_q)) {
600 q = list_entry(ixp->ixp_q.next, struct ixp_q, ixp_q_list);
601 list_del(&q->ixp_q_list);
602 ixp_q_process(q);
603 }
604 }
605
606 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
607 static void
608 ixp_process_pending_wq(struct work_struct *work)
609 {
610 struct ixp_data *ixp = container_of(work, struct ixp_data, ixp_pending_work);
611 ixp_process_pending(ixp);
612 }
613 #endif
614
615 /*
616 * callback for when context registration is complete
617 */
618
619 static void
620 ixp_register_cb(UINT32 ctx_id, IX_MBUF *bufp, IxCryptoAccStatus status)
621 {
622 int i;
623 struct ixp_data *ixp;
624 struct ixp_q *q;
625
626 dprintk("%s(%d, %p, %d)\n", __FUNCTION__, ctx_id, bufp, status);
627
628 /*
629 * free any buffer passed in to this routine
630 */
631 if (bufp) {
632 IX_MBUF_MLEN(bufp) = IX_MBUF_PKT_LEN(bufp) = 0;
633 kfree(IX_MBUF_MDATA(bufp));
634 IX_MBUF_MDATA(bufp) = NULL;
635 }
636
637 for (i = 0; i < ixp_sesnum; i++) {
638 ixp = ixp_sessions[i];
639 if (ixp && ixp->ixp_ctx_id == ctx_id)
640 break;
641 }
642 if (i >= ixp_sesnum) {
643 printk("ixp: invalid context id %d\n", ctx_id);
644 return;
645 }
646
647 if (IX_CRYPTO_ACC_STATUS_WAIT == status) {
648 /* this is normal to free the first of two buffers */
649 dprintk("ixp: register not finished yet.\n");
650 return;
651 }
652
653 if (IX_CRYPTO_ACC_STATUS_SUCCESS != status) {
654 printk("ixp: register failed 0x%x\n", status);
655 while (!list_empty(&ixp->ixp_q)) {
656 q = list_entry(ixp->ixp_q.next, struct ixp_q, ixp_q_list);
657 list_del(&q->ixp_q_list);
658 q->ixp_q_crp->crp_etype = EINVAL;
659 crypto_done(q->ixp_q_crp);
660 kmem_cache_free(qcache, q);
661 }
662 return;
663 }
664
665 /*
666 * we are now registered, we cannot start processing the Q here
667 * or we get strange errors with AES (DES/3DES seem to be ok).
668 */
669 ixp->ixp_registered = 1;
670 schedule_work(&ixp->ixp_pending_work);
671 }
672
673
674 /*
675 * callback for when data processing is complete
676 */
677
678 static void
679 ixp_perform_cb(
680 UINT32 ctx_id,
681 IX_MBUF *sbufp,
682 IX_MBUF *dbufp,
683 IxCryptoAccStatus status)
684 {
685 struct ixp_q *q;
686
687 dprintk("%s(%d, %p, %p, 0x%x)\n", __FUNCTION__, ctx_id, sbufp,
688 dbufp, status);
689
690 if (sbufp == NULL) {
691 printk("ixp: NULL sbuf in ixp_perform_cb\n");
692 return;
693 }
694
695 q = IX_MBUF_PRIV(sbufp);
696 if (q == NULL) {
697 printk("ixp: NULL priv in ixp_perform_cb\n");
698 return;
699 }
700
701 if (status != IX_CRYPTO_ACC_STATUS_SUCCESS) {
702 printk("ixp: perform failed status=%d\n", status);
703 q->ixp_q_crp->crp_etype = EINVAL;
704 }
705
706 crypto_done(q->ixp_q_crp);
707 kmem_cache_free(qcache, q);
708 }
709
710
711 /*
712 * registration is not callable at IRQ time, so we defer
713 * to a task queue, this routines completes the registration for us
714 * when the task queue runs
715 *
716 * Unfortunately this means we cannot tell OCF that the driver is blocked,
717 * we do that on the next request.
718 */
719
720 static void
721 ixp_registration(void *arg)
722 {
723 struct ixp_data *ixp = arg;
724 struct ixp_q *q = NULL;
725 IX_MBUF *pri = NULL, *sec = NULL;
726 int status = IX_CRYPTO_ACC_STATUS_SUCCESS;
727
728 if (!ixp) {
729 printk("ixp: ixp_registration with no arg\n");
730 return;
731 }
732
733 if (ixp->ixp_ctx_id != -1) {
734 ixCryptoAccCtxUnregister(ixp->ixp_ctx_id);
735 ixp->ixp_ctx_id = -1;
736 }
737
738 if (list_empty(&ixp->ixp_q)) {
739 printk("ixp: ixp_registration with no Q\n");
740 return;
741 }
742
743 /*
744 * setup the primary and secondary buffers
745 */
746 q = list_entry(ixp->ixp_q.next, struct ixp_q, ixp_q_list);
747 if (q->ixp_q_acrd) {
748 pri = &ixp->ixp_pri_mbuf;
749 sec = &ixp->ixp_sec_mbuf;
750 IX_MBUF_MLEN(pri) = IX_MBUF_PKT_LEN(pri) = 128;
751 IX_MBUF_MDATA(pri) = (unsigned char *) kmalloc(128, SLAB_ATOMIC);
752 IX_MBUF_MLEN(sec) = IX_MBUF_PKT_LEN(sec) = 128;
753 IX_MBUF_MDATA(sec) = (unsigned char *) kmalloc(128, SLAB_ATOMIC);
754 }
755
756 /* Only need to register if a crypt op or HMAC op */
757 if (!(ixp->ixp_auth_alg == CRYPTO_SHA1 ||
758 ixp->ixp_auth_alg == CRYPTO_MD5)) {
759 status = ixCryptoAccCtxRegister(
760 &ixp->ixp_ctx,
761 pri, sec,
762 ixp_register_cb,
763 ixp_perform_cb,
764 &ixp->ixp_ctx_id);
765 }
766 else {
767 /* Otherwise we start processing pending q */
768 schedule_work(&ixp->ixp_pending_work);
769 }
770
771 if (IX_CRYPTO_ACC_STATUS_SUCCESS == status)
772 return;
773
774 if (IX_CRYPTO_ACC_STATUS_EXCEED_MAX_TUNNELS == status) {
775 printk("ixp: ixCryptoAccCtxRegister failed (out of tunnels)\n");
776 ixp_blocked = 1;
777 /* perhaps we should return EGAIN on queued ops ? */
778 return;
779 }
780
781 printk("ixp: ixCryptoAccCtxRegister failed %d\n", status);
782 ixp->ixp_ctx_id = -1;
783
784 /*
785 * everything waiting is toasted
786 */
787 while (!list_empty(&ixp->ixp_q)) {
788 q = list_entry(ixp->ixp_q.next, struct ixp_q, ixp_q_list);
789 list_del(&q->ixp_q_list);
790 q->ixp_q_crp->crp_etype = ENOENT;
791 crypto_done(q->ixp_q_crp);
792 kmem_cache_free(qcache, q);
793 }
794 }
795
796 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
797 static void
798 ixp_registration_wq(struct work_struct *work)
799 {
800 struct ixp_data *ixp = container_of(work, struct ixp_data,
801 ixp_registration_work);
802 ixp_registration(ixp);
803 }
804 #endif
805
806 /*
807 * Process a request.
808 */
809 static int
810 ixp_process(device_t dev, struct cryptop *crp, int hint)
811 {
812 struct ixp_data *ixp;
813 unsigned int lid;
814 struct ixp_q *q = NULL;
815 int status;
816
817 dprintk("%s()\n", __FUNCTION__);
818
819 /* Sanity check */
820 if (crp == NULL) {
821 dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
822 return EINVAL;
823 }
824
825 crp->crp_etype = 0;
826
827 if (ixp_blocked)
828 return ERESTART;
829
830 if (crp->crp_desc == NULL || crp->crp_buf == NULL) {
831 dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
832 crp->crp_etype = EINVAL;
833 goto done;
834 }
835
836 /*
837 * find the session we are using
838 */
839
840 lid = crp->crp_sid & 0xffffffff;
841 if (lid >= ixp_sesnum || lid == 0 || ixp_sessions == NULL ||
842 ixp_sessions[lid] == NULL) {
843 crp->crp_etype = ENOENT;
844 dprintk("%s,%d: ENOENT\n", __FILE__, __LINE__);
845 goto done;
846 }
847 ixp = ixp_sessions[lid];
848
849 /*
850 * setup a new request ready for queuing
851 */
852 q = kmem_cache_alloc(qcache, SLAB_ATOMIC);
853 if (q == NULL) {
854 dprintk("%s,%d: ENOMEM\n", __FILE__, __LINE__);
855 crp->crp_etype = ENOMEM;
856 goto done;
857 }
858 /*
859 * save some cycles by only zeroing the important bits
860 */
861 memset(&q->ixp_q_mbuf, 0, sizeof(q->ixp_q_mbuf));
862 q->ixp_q_ccrd = NULL;
863 q->ixp_q_acrd = NULL;
864 q->ixp_q_crp = crp;
865 q->ixp_q_data = ixp;
866
867 /*
868 * point the cipher and auth descriptors appropriately
869 * check that we have something to do
870 */
871 if (crp->crp_desc->crd_alg == ixp->ixp_cipher_alg)
872 q->ixp_q_ccrd = crp->crp_desc;
873 else if (crp->crp_desc->crd_alg == ixp->ixp_auth_alg)
874 q->ixp_q_acrd = crp->crp_desc;
875 else {
876 crp->crp_etype = ENOENT;
877 dprintk("%s,%d: bad desc match: ENOENT\n", __FILE__, __LINE__);
878 goto done;
879 }
880 if (crp->crp_desc->crd_next) {
881 if (crp->crp_desc->crd_next->crd_alg == ixp->ixp_cipher_alg)
882 q->ixp_q_ccrd = crp->crp_desc->crd_next;
883 else if (crp->crp_desc->crd_next->crd_alg == ixp->ixp_auth_alg)
884 q->ixp_q_acrd = crp->crp_desc->crd_next;
885 else {
886 crp->crp_etype = ENOENT;
887 dprintk("%s,%d: bad desc match: ENOENT\n", __FILE__, __LINE__);
888 goto done;
889 }
890 }
891
892 /*
893 * If there is a direction change for this context then we mark it as
894 * unregistered and re-register is for the new direction. This is not
895 * a very expensive operation and currently only tends to happen when
896 * user-space application are doing benchmarks
897 *
898 * DM - we should be checking for pending requests before unregistering.
899 */
900 if (q->ixp_q_ccrd && ixp->ixp_registered &&
901 ixp->ixp_crd_flags != (q->ixp_q_ccrd->crd_flags & CRD_F_ENCRYPT)) {
902 dprintk("%s - detected direction change on session\n", __FUNCTION__);
903 ixp->ixp_registered = 0;
904 }
905
906 /*
907 * if we are registered, call straight into the perform code
908 */
909 if (ixp->ixp_registered) {
910 ixp_q_process(q);
911 return 0;
912 }
913
914 /*
915 * the only part of the context not set in newsession is the direction
916 * dependent parts
917 */
918 if (q->ixp_q_ccrd) {
919 ixp->ixp_crd_flags = (q->ixp_q_ccrd->crd_flags & CRD_F_ENCRYPT);
920 if (q->ixp_q_ccrd->crd_flags & CRD_F_ENCRYPT) {
921 ixp->ixp_ctx.operation = q->ixp_q_acrd ?
922 IX_CRYPTO_ACC_OP_ENCRYPT_AUTH : IX_CRYPTO_ACC_OP_ENCRYPT;
923 } else {
924 ixp->ixp_ctx.operation = q->ixp_q_acrd ?
925 IX_CRYPTO_ACC_OP_AUTH_DECRYPT : IX_CRYPTO_ACC_OP_DECRYPT;
926 }
927 } else {
928 /* q->ixp_q_acrd must be set if we are here */
929 ixp->ixp_ctx.operation = IX_CRYPTO_ACC_OP_AUTH_CALC;
930 }
931
932 status = list_empty(&ixp->ixp_q);
933 list_add_tail(&q->ixp_q_list, &ixp->ixp_q);
934 if (status)
935 schedule_work(&ixp->ixp_registration_work);
936 return 0;
937
938 done:
939 if (q)
940 kmem_cache_free(qcache, q);
941 crypto_done(crp);
942 return 0;
943 }
944
945
946 #ifdef __ixp46X
947 /*
948 * key processing support for the ixp465
949 */
950
951
952 /*
953 * copy a BN (LE) into a buffer (BE) an fill out the op appropriately
954 * assume zeroed and only copy bits that are significant
955 */
956
957 static int
958 ixp_copy_ibuf(struct crparam *p, IxCryptoAccPkeEauOperand *op, UINT32 *buf)
959 {
960 unsigned char *src = (unsigned char *) p->crp_p;
961 unsigned char *dst;
962 int len, bits = p->crp_nbits;
963
964 dprintk("%s()\n", __FUNCTION__);
965
966 if (bits > MAX_IOP_SIZE * sizeof(UINT32) * 8) {
967 dprintk("%s - ibuf too big (%d > %d)\n", __FUNCTION__,
968 bits, MAX_IOP_SIZE * sizeof(UINT32) * 8);
969 return -1;
970 }
971
972 len = (bits + 31) / 32; /* the number UINT32's needed */
973
974 dst = (unsigned char *) &buf[len];
975 dst--;
976
977 while (bits > 0) {
978 *dst-- = *src++;
979 bits -= 8;
980 }
981
982 #if 0 /* no need to zero remaining bits as it is done during request alloc */
983 while (dst > (unsigned char *) buf)
984 *dst-- = '\0';
985 #endif
986
987 op->pData = buf;
988 op->dataLen = len;
989 return 0;
990 }
991
992 /*
993 * copy out the result, be as forgiving as we can about small output buffers
994 */
995
996 static int
997 ixp_copy_obuf(struct crparam *p, IxCryptoAccPkeEauOpResult *op, UINT32 *buf)
998 {
999 unsigned char *dst = (unsigned char *) p->crp_p;
1000 unsigned char *src = (unsigned char *) buf;
1001 int len, z, bits = p->crp_nbits;
1002
1003 dprintk("%s()\n", __FUNCTION__);
1004
1005 len = op->dataLen * sizeof(UINT32);
1006
1007 /* skip leading zeroes to be small buffer friendly */
1008 z = 0;
1009 while (z < len && src[z] == '\0')
1010 z++;
1011
1012 src += len;
1013 src--;
1014 len -= z;
1015
1016 while (len > 0 && bits > 0) {
1017 *dst++ = *src--;
1018 len--;
1019 bits -= 8;
1020 }
1021
1022 while (bits > 0) {
1023 *dst++ = '\0';
1024 bits -= 8;
1025 }
1026
1027 if (len > 0) {
1028 dprintk("%s - obuf is %d (z=%d, ob=%d) bytes too small\n",
1029 __FUNCTION__, len, z, p->crp_nbits / 8);
1030 return -1;
1031 }
1032
1033 return 0;
1034 }
1035
1036
1037 /*
1038 * the parameter offsets for exp_mod
1039 */
1040
1041 #define IXP_PARAM_BASE 0
1042 #define IXP_PARAM_EXP 1
1043 #define IXP_PARAM_MOD 2
1044 #define IXP_PARAM_RES 3
1045
1046 /*
1047 * key processing complete callback, is also used to start processing
1048 * by passing a NULL for pResult
1049 */
1050
1051 static void
1052 ixp_kperform_cb(
1053 IxCryptoAccPkeEauOperation operation,
1054 IxCryptoAccPkeEauOpResult *pResult,
1055 BOOL carryOrBorrow,
1056 IxCryptoAccStatus status)
1057 {
1058 struct ixp_pkq *q, *tmp;
1059 unsigned long flags;
1060
1061 dprintk("%s(0x%x, %p, %d, 0x%x)\n", __FUNCTION__, operation, pResult,
1062 carryOrBorrow, status);
1063
1064 /* handle a completed request */
1065 if (pResult) {
1066 if (ixp_pk_cur && &ixp_pk_cur->pkq_result == pResult) {
1067 q = ixp_pk_cur;
1068 if (status != IX_CRYPTO_ACC_STATUS_SUCCESS) {
1069 dprintk("%s() - op failed 0x%x\n", __FUNCTION__, status);
1070 q->pkq_krp->krp_status = ERANGE; /* could do better */
1071 } else {
1072 /* copy out the result */
1073 if (ixp_copy_obuf(&q->pkq_krp->krp_param[IXP_PARAM_RES],
1074 &q->pkq_result, q->pkq_obuf))
1075 q->pkq_krp->krp_status = ERANGE;
1076 }
1077 crypto_kdone(q->pkq_krp);
1078 kfree(q);
1079 ixp_pk_cur = NULL;
1080 } else
1081 printk("%s - callback with invalid result pointer\n", __FUNCTION__);
1082 }
1083
1084 spin_lock_irqsave(&ixp_pkq_lock, flags);
1085 if (ixp_pk_cur || list_empty(&ixp_pkq)) {
1086 spin_unlock_irqrestore(&ixp_pkq_lock, flags);
1087 return;
1088 }
1089
1090 list_for_each_entry_safe(q, tmp, &ixp_pkq, pkq_list) {
1091
1092 list_del(&q->pkq_list);
1093 ixp_pk_cur = q;
1094
1095 spin_unlock_irqrestore(&ixp_pkq_lock, flags);
1096
1097 status = ixCryptoAccPkeEauPerform(
1098 IX_CRYPTO_ACC_OP_EAU_MOD_EXP,
1099 &q->pkq_op,
1100 ixp_kperform_cb,
1101 &q->pkq_result);
1102
1103 if (status == IX_CRYPTO_ACC_STATUS_SUCCESS) {
1104 dprintk("%s() - ixCryptoAccPkeEauPerform SUCCESS\n", __FUNCTION__);
1105 return; /* callback will return here for callback */
1106 } else if (status == IX_CRYPTO_ACC_STATUS_RETRY) {
1107 printk("%s() - ixCryptoAccPkeEauPerform RETRY\n", __FUNCTION__);
1108 } else {
1109 printk("%s() - ixCryptoAccPkeEauPerform failed %d\n",
1110 __FUNCTION__, status);
1111 }
1112 q->pkq_krp->krp_status = ERANGE; /* could do better */
1113 crypto_kdone(q->pkq_krp);
1114 kfree(q);
1115 spin_lock_irqsave(&ixp_pkq_lock, flags);
1116 }
1117 spin_unlock_irqrestore(&ixp_pkq_lock, flags);
1118 }
1119
1120
1121 static int
1122 ixp_kprocess(device_t dev, struct cryptkop *krp, int hint)
1123 {
1124 struct ixp_pkq *q;
1125 int rc = 0;
1126 unsigned long flags;
1127
1128 dprintk("%s l1=%d l2=%d l3=%d l4=%d\n", __FUNCTION__,
1129 krp->krp_param[IXP_PARAM_BASE].crp_nbits,
1130 krp->krp_param[IXP_PARAM_EXP].crp_nbits,
1131 krp->krp_param[IXP_PARAM_MOD].crp_nbits,
1132 krp->krp_param[IXP_PARAM_RES].crp_nbits);
1133
1134
1135 if (krp->krp_op != CRK_MOD_EXP) {
1136 krp->krp_status = EOPNOTSUPP;
1137 goto err;
1138 }
1139
1140 q = (struct ixp_pkq *) kmalloc(sizeof(*q), GFP_KERNEL);
1141 if (q == NULL) {
1142 krp->krp_status = ENOMEM;
1143 goto err;
1144 }
1145
1146 /*
1147 * The PKE engine does not appear to zero the output buffer
1148 * appropriately, so we need to do it all here.
1149 */
1150 memset(q, 0, sizeof(*q));
1151
1152 q->pkq_krp = krp;
1153 INIT_LIST_HEAD(&q->pkq_list);
1154
1155 if (ixp_copy_ibuf(&krp->krp_param[IXP_PARAM_BASE], &q->pkq_op.modExpOpr.M,
1156 q->pkq_ibuf0))
1157 rc = 1;
1158 if (!rc && ixp_copy_ibuf(&krp->krp_param[IXP_PARAM_EXP],
1159 &q->pkq_op.modExpOpr.e, q->pkq_ibuf1))
1160 rc = 2;
1161 if (!rc && ixp_copy_ibuf(&krp->krp_param[IXP_PARAM_MOD],
1162 &q->pkq_op.modExpOpr.N, q->pkq_ibuf2))
1163 rc = 3;
1164
1165 if (rc) {
1166 kfree(q);
1167 krp->krp_status = ERANGE;
1168 goto err;
1169 }
1170
1171 q->pkq_result.pData = q->pkq_obuf;
1172 q->pkq_result.dataLen =
1173 (krp->krp_param[IXP_PARAM_RES].crp_nbits + 31) / 32;
1174
1175 spin_lock_irqsave(&ixp_pkq_lock, flags);
1176 list_add_tail(&q->pkq_list, &ixp_pkq);
1177 spin_unlock_irqrestore(&ixp_pkq_lock, flags);
1178
1179 if (!ixp_pk_cur)
1180 ixp_kperform_cb(0, NULL, 0, 0);
1181 return (0);
1182
1183 err:
1184 crypto_kdone(krp);
1185 return (0);
1186 }
1187
1188
1189
1190 #ifdef CONFIG_OCF_RANDOMHARVEST
1191 /*
1192 * We run the random number generator output through SHA so that it
1193 * is FIPS compliant.
1194 */
1195
1196 static volatile int sha_done = 0;
1197 static unsigned char sha_digest[20];
1198
1199 static void
1200 ixp_hash_cb(UINT8 *digest, IxCryptoAccStatus status)
1201 {
1202 dprintk("%s(%p, %d)\n", __FUNCTION__, digest, status);
1203 if (sha_digest != digest)
1204 printk("digest error\n");
1205 if (IX_CRYPTO_ACC_STATUS_SUCCESS == status)
1206 sha_done = 1;
1207 else
1208 sha_done = -status;
1209 }
1210
1211 static int
1212 ixp_read_random(void *arg, u_int32_t *buf, int maxwords)
1213 {
1214 IxCryptoAccStatus status;
1215 int i, n, rc;
1216
1217 dprintk("%s(%p, %d)\n", __FUNCTION__, buf, maxwords);
1218 memset(buf, 0, maxwords * sizeof(*buf));
1219 status = ixCryptoAccPkePseudoRandomNumberGet(maxwords, buf);
1220 if (status != IX_CRYPTO_ACC_STATUS_SUCCESS) {
1221 dprintk("%s: ixCryptoAccPkePseudoRandomNumberGet failed %d\n",
1222 __FUNCTION__, status);
1223 return 0;
1224 }
1225
1226 /*
1227 * run the random data through SHA to make it look more random
1228 */
1229
1230 n = sizeof(sha_digest); /* process digest bytes at a time */
1231
1232 rc = 0;
1233 for (i = 0; i < maxwords; i += n / sizeof(*buf)) {
1234 if ((maxwords - i) * sizeof(*buf) < n)
1235 n = (maxwords - i) * sizeof(*buf);
1236 sha_done = 0;
1237 status = ixCryptoAccPkeHashPerform(IX_CRYPTO_ACC_AUTH_SHA1,
1238 (UINT8 *) &buf[i], n, ixp_hash_cb, sha_digest);
1239 if (status != IX_CRYPTO_ACC_STATUS_SUCCESS) {
1240 dprintk("ixCryptoAccPkeHashPerform failed %d\n", status);
1241 return -EIO;
1242 }
1243 while (!sha_done)
1244 schedule();
1245 if (sha_done < 0) {
1246 dprintk("ixCryptoAccPkeHashPerform failed CB %d\n", -sha_done);
1247 return 0;
1248 }
1249 memcpy(&buf[i], sha_digest, n);
1250 rc += n / sizeof(*buf);;
1251 }
1252
1253 return rc;
1254 }
1255 #endif /* CONFIG_OCF_RANDOMHARVEST */
1256
1257 #endif /* __ixp46X */
1258
1259
1260
1261 /*
1262 * our driver startup and shutdown routines
1263 */
1264
1265 static int
1266 ixp_init(void)
1267 {
1268 dprintk("%s(%p)\n", __FUNCTION__, ixp_init);
1269
1270 if (ixp_init_crypto && ixCryptoAccInit() != IX_CRYPTO_ACC_STATUS_SUCCESS)
1271 printk("ixCryptoAccInit failed, assuming already initialised!\n");
1272
1273 qcache = kmem_cache_create("ixp4xx_q", sizeof(struct ixp_q), 0,
1274 SLAB_HWCACHE_ALIGN, NULL
1275 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
1276 , NULL
1277 #endif
1278 );
1279 if (!qcache) {
1280 printk("failed to create Qcache\n");
1281 return -ENOENT;
1282 }
1283
1284 memset(&ixpdev, 0, sizeof(ixpdev));
1285 softc_device_init(&ixpdev, "ixp4xx", 0, ixp_methods);
1286
1287 ixp_id = crypto_get_driverid(softc_get_device(&ixpdev),
1288 CRYPTOCAP_F_HARDWARE);
1289 if (ixp_id < 0)
1290 panic("IXP/OCF crypto device cannot initialize!");
1291
1292 #define REGISTER(alg) \
1293 crypto_register(ixp_id,alg,0,0)
1294
1295 REGISTER(CRYPTO_DES_CBC);
1296 REGISTER(CRYPTO_3DES_CBC);
1297 REGISTER(CRYPTO_RIJNDAEL128_CBC);
1298 #ifdef CONFIG_OCF_IXP4XX_SHA1_MD5
1299 REGISTER(CRYPTO_MD5);
1300 REGISTER(CRYPTO_SHA1);
1301 #endif
1302 REGISTER(CRYPTO_MD5_HMAC);
1303 REGISTER(CRYPTO_SHA1_HMAC);
1304 #undef REGISTER
1305
1306 #ifdef __ixp46X
1307 spin_lock_init(&ixp_pkq_lock);
1308 /*
1309 * we do not enable the go fast options here as they can potentially
1310 * allow timing based attacks
1311 *
1312 * http://www.openssl.org/news/secadv_20030219.txt
1313 */
1314 ixCryptoAccPkeEauExpConfig(0, 0);
1315 crypto_kregister(ixp_id, CRK_MOD_EXP, 0);
1316 #ifdef CONFIG_OCF_RANDOMHARVEST
1317 crypto_rregister(ixp_id, ixp_read_random, NULL);
1318 #endif
1319 #endif
1320
1321 return 0;
1322 }
1323
1324 static void
1325 ixp_exit(void)
1326 {
1327 dprintk("%s()\n", __FUNCTION__);
1328 crypto_unregister_all(ixp_id);
1329 ixp_id = -1;
1330 kmem_cache_destroy(qcache);
1331 qcache = NULL;
1332 }
1333
1334 module_init(ixp_init);
1335 module_exit(ixp_exit);
1336
1337 MODULE_LICENSE("Dual BSD/GPL");
1338 MODULE_AUTHOR("David McCullough <dmccullough@cyberguard.com>");
1339 MODULE_DESCRIPTION("ixp (OCF module for IXP4xx crypto)");
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