aboutsummaryrefslogtreecommitdiff
path: root/sys/mips/nlm/dev/sec/nlmsec.c
blob: b32ec3406bb48ed1aafee66b14938c111eff9641 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2003-2012 Broadcom Corporation
 * All Rights Reserved
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/mbuf.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <sys/bus.h>
#include <sys/random.h>
#include <sys/rman.h>
#include <sys/uio.h>
#include <sys/kobj.h>

#include <dev/pci/pcivar.h>

#include <opencrypto/cryptodev.h>
#include <opencrypto/xform_auth.h>

#include "cryptodev_if.h"

#include <vm/vm.h>
#include <vm/pmap.h>

#include <mips/nlm/hal/haldefs.h>
#include <mips/nlm/hal/iomap.h>
#include <mips/nlm/xlp.h>
#include <mips/nlm/hal/sys.h>
#include <mips/nlm/hal/fmn.h>
#include <mips/nlm/hal/nlmsaelib.h>
#include <mips/nlm/dev/sec/nlmseclib.h>
#include <mips/nlm/hal/cop2.h>
#include <mips/nlm/hal/mips-extns.h>
#include <mips/nlm/msgring.h>

unsigned int creditleft;

static	int xlp_sec_init(struct xlp_sec_softc *sc);
static	int xlp_sec_probesession(device_t,
    const struct crypto_session_params *);
static	int xlp_sec_newsession(device_t , crypto_session_t,
    const struct crypto_session_params *);
static	int xlp_sec_process(device_t , struct cryptop *, int);
static void xlp_copyiv(struct xlp_sec_softc *, struct xlp_sec_command *,
    const struct crypto_session_params *);
static int xlp_get_nsegs(struct cryptop *, unsigned int *);
static int xlp_alloc_cmd_params(struct xlp_sec_command *, unsigned int);
static void  xlp_free_cmd_params(struct xlp_sec_command *);

static	int xlp_sec_probe(device_t);
static	int xlp_sec_attach(device_t);
static	int xlp_sec_detach(device_t);

static device_method_t xlp_sec_methods[] = {
	/* device interface */
	DEVMETHOD(device_probe, xlp_sec_probe),
	DEVMETHOD(device_attach, xlp_sec_attach),
	DEVMETHOD(device_detach, xlp_sec_detach),

	/* bus interface */
	DEVMETHOD(bus_print_child, bus_generic_print_child),
	DEVMETHOD(bus_driver_added, bus_generic_driver_added),

	/* crypto device methods */
	DEVMETHOD(cryptodev_probesession, xlp_sec_probesession),
	DEVMETHOD(cryptodev_newsession, xlp_sec_newsession),
	DEVMETHOD(cryptodev_process,    xlp_sec_process),

	DEVMETHOD_END
};

static driver_t xlp_sec_driver = {
	"nlmsec",
	xlp_sec_methods,
	sizeof(struct xlp_sec_softc)
};
static devclass_t xlp_sec_devclass;

DRIVER_MODULE(nlmsec, pci, xlp_sec_driver, xlp_sec_devclass, 0, 0);
MODULE_DEPEND(nlmsec, crypto, 1, 1, 1);

void
nlm_xlpsec_msgring_handler(int vc, int size, int code, int src_id,
    struct nlm_fmn_msg *msg, void *data);

#ifdef NLM_SEC_DEBUG

#define extract_bits(x, bitshift, bitcnt)				\
    (((unsigned long long)x >> bitshift) & ((1ULL << bitcnt) - 1))

void
print_crypto_params(struct xlp_sec_command *cmd, struct nlm_fmn_msg m)
{
	unsigned long long msg0,msg1,msg2,msg3,msg4,msg5,msg6,msg7,msg8;

	msg0 = cmd->ctrlp->desc0;
	msg1 = cmd->paramp->desc0;
	msg2 = cmd->paramp->desc1;
	msg3 = cmd->paramp->desc2;
	msg4 = cmd->paramp->desc3;
	msg5 = cmd->paramp->segment[0][0];
	msg6 = cmd->paramp->segment[0][1];
	msg7 = m.msg[0];
	msg8 = m.msg[1];

	printf("msg0 %llx msg1 %llx msg2 %llx msg3 %llx msg4 %llx msg5 %llx"
	    "msg6 %llx msg7 %llx msg8 %llx\n", msg0, msg1, msg2, msg3, msg4,
	    msg5, msg6, msg7, msg8);

	printf("c0: hmac %d htype %d hmode %d ctype %d cmode %d arc4 %x\n",
	    (unsigned int)extract_bits(msg0, 61, 1),
	    (unsigned int)extract_bits(msg0, 52, 8),
	    (unsigned int)extract_bits(msg0, 43, 8),
	    (unsigned int)extract_bits(msg0, 34, 8),
	    (unsigned int)extract_bits(msg0, 25, 8),
	    (unsigned int)extract_bits(msg0, 0, 23));

	printf("p0: tls %d hsrc %d hl3 %d enc %d ivl %d hd %llx\n",
	    (unsigned int)extract_bits(msg1, 63, 1),
	    (unsigned int)extract_bits(msg1,62,1),
	    (unsigned int)extract_bits(msg1,60,1),
	    (unsigned int)extract_bits(msg1,59,1),
	    (unsigned int)extract_bits(msg1,41,16), extract_bits(msg1,0,40));

	printf("p1: clen %u hl %u\n",  (unsigned int)extract_bits(msg2, 32, 32),
	    (unsigned int)extract_bits(msg2,0,32));

	printf("p2: ivoff %d cbit %d coff %d hbit %d hclb %d hoff %d\n",
	    (unsigned int)extract_bits(msg3, 45, 17),
	    (unsigned int)extract_bits(msg3, 42,3),
	    (unsigned int)extract_bits(msg3, 22,16),
	    (unsigned int)extract_bits(msg3, 19,3),
	    (unsigned int)extract_bits(msg3, 18,1),
	    (unsigned int)extract_bits(msg3, 0, 16));

	printf("p3: desfbid %d tlen %d arc4 %x hmacpad %d\n",
	    (unsigned int)extract_bits(msg4, 48,16),
	    (unsigned int)extract_bits(msg4,11,16),
	    (unsigned int)extract_bits(msg4,6,3),
	    (unsigned int)extract_bits(msg4,5,1));

	printf("p4: sflen %d sddr %llx \n",
	    (unsigned int)extract_bits(msg5, 48, 16),extract_bits(msg5, 0, 40));

	printf("p5: dflen %d cl3 %d cclob %d cdest %llx \n",
	    (unsigned int)extract_bits(msg6, 48, 16),
	    (unsigned int)extract_bits(msg6, 46, 1),
	    (unsigned int)extract_bits(msg6, 41, 1), extract_bits(msg6, 0, 40));

	printf("fmn0: fbid %d dfrlen %d dfrv %d cklen %d cdescaddr %llx\n",
	    (unsigned int)extract_bits(msg7, 48, 16),
	    (unsigned int)extract_bits(msg7,46,2),
	    (unsigned int)extract_bits(msg7,45,1),
	    (unsigned int)extract_bits(msg7,40,5),
	    (extract_bits(msg7,0,34)<< 6));

	printf("fmn1: arc4 %d hklen %d pdesclen %d pktdescad %llx\n",
	    (unsigned int)extract_bits(msg8, 63, 1),
	    (unsigned int)extract_bits(msg8,56,5),
	    (unsigned int)extract_bits(msg8,43,12),
	    (extract_bits(msg8,0,34) << 6));

	return;
}

void
print_cmd(struct xlp_sec_command *cmd)
{
	printf("session_num		:%d\n",cmd->session_num);
	printf("crp			:0x%x\n",(uint32_t)cmd->crp);
	printf("enccrd			:0x%x\n",(uint32_t)cmd->enccrd);
	printf("maccrd			:0x%x\n",(uint32_t)cmd->maccrd);
	printf("ses			:%d\n",(uint32_t)cmd->ses);
	printf("ctrlp			:0x%x\n",(uint32_t)cmd->ctrlp);
	printf("paramp			:0x%x\n",(uint32_t)cmd->paramp);
	printf("hashdest		:0x%x\n",(uint32_t)cmd->hashdest);
	printf("hashsrc			:%d\n",cmd->hashsrc);
	printf("hmacpad			:%d\n",cmd->hmacpad);
	printf("hashoff			:%d\n",cmd->hashoff);
	printf("hashlen			:%d\n",cmd->hashlen);
	printf("cipheroff		:%d\n",cmd->cipheroff);
	printf("cipherlen		:%d\n",cmd->cipherlen);
	printf("ivoff			:%d\n",cmd->ivoff);
	printf("ivlen			:%d\n",cmd->ivlen);
	printf("hashalg			:%d\n",cmd->hashalg);
	printf("hashmode		:%d\n",cmd->hashmode);
	printf("cipheralg		:%d\n",cmd->cipheralg);
	printf("ciphermode		:%d\n",cmd->ciphermode);
	printf("nsegs     		:%d\n",cmd->nsegs);
	printf("hash_dst_len		:%d\n",cmd->hash_dst_len);
}
#endif /* NLM_SEC_DEBUG */

static int
xlp_sec_init(struct xlp_sec_softc *sc)
{

	/* Register interrupt handler for the SEC CMS messages */
	if (register_msgring_handler(sc->sec_vc_start,
	    sc->sec_vc_end, nlm_xlpsec_msgring_handler, sc) != 0) {
		printf("Couldn't register sec msgring handler\n");
		return (-1);
	}

	/* Do the CMS credit initialization */
	/* Currently it is configured by default to 50 when kernel comes up */

	return (0);
}

/* This function is called from an interrupt handler */
void
nlm_xlpsec_msgring_handler(int vc, int size, int code, int src_id,
    struct nlm_fmn_msg *msg, void *data)
{
	struct xlp_sec_command *cmd = NULL;
	struct xlp_sec_softc *sc = NULL;
	uint8_t hash[HASH_MAX_LEN];

	KASSERT(code == FMN_SWCODE_CRYPTO,
	    ("%s: bad code = %d, expected code = %d\n", __FUNCTION__,
	    code, FMN_SWCODE_CRYPTO));

	sc = (struct xlp_sec_softc *)data;
	KASSERT(src_id >= sc->sec_vc_start && src_id <= sc->sec_vc_end,
	    ("%s: bad src_id = %d, expect %d - %d\n", __FUNCTION__,
	    src_id, sc->sec_vc_start, sc->sec_vc_end));

	cmd = (struct xlp_sec_command *)(uintptr_t)msg->msg[0];
	KASSERT(cmd != NULL && cmd->crp != NULL,
		("%s :cmd not received properly\n",__FUNCTION__));

	KASSERT(CRYPTO_ERROR(msg->msg[1]) == 0,
	    ("%s: Message rcv msg0 %llx msg1 %llx err %x \n", __FUNCTION__,
	    (unsigned long long)msg->msg[0], (unsigned long long)msg->msg[1],
	    (int)CRYPTO_ERROR(msg->msg[1])));

	/* If there are not enough credits to send, then send request
	 * will fail with ERESTART and the driver will be blocked until it is
	 * unblocked here after knowing that there are sufficient credits to
	 * send the request again.
	 */
	if (sc->sc_needwakeup) {
		atomic_add_int(&creditleft, sc->sec_msgsz);
		if (creditleft >= (NLM_CRYPTO_LEFT_REQS)) {
			crypto_unblock(sc->sc_cid, sc->sc_needwakeup);
			sc->sc_needwakeup &= (~(CRYPTO_SYMQ | CRYPTO_ASYMQ));
		}
	}
	if (cmd->hash_dst_len != 0) {
		if (cmd->crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
			crypto_copydata(cmd->crp, cmd->crp->crp_digest_start,
			    cmd->hash_dst_len, hash);
			if (timingsafe_bcmp(cmd->hashdest, hash,
			    cmd->hash_dst_len) != 0)
				cmd->crp->crp_etype = EBADMSG;
		} else
			crypto_copyback(cmd->crp, cmd->crp->crp_digest_start,
			    cmd->hash_dst_len, cmd->hashdest);
	}

	/* This indicates completion of the crypto operation */
	crypto_done(cmd->crp);

	xlp_free_cmd_params(cmd);

	return;
}

static int
xlp_sec_probe(device_t dev)
{
	struct xlp_sec_softc *sc;

	if (pci_get_vendor(dev) == PCI_VENDOR_NETLOGIC &&
	    pci_get_device(dev) == PCI_DEVICE_ID_NLM_SAE) {
		sc = device_get_softc(dev);
		return (BUS_PROBE_DEFAULT);
	}
	return (ENXIO);
}

/*
 * Attach an interface that successfully probed.
 */
static int
xlp_sec_attach(device_t dev)
{
	struct xlp_sec_softc *sc = device_get_softc(dev);
	uint64_t base;
	int qstart, qnum;
	int freq, node;

	sc->sc_dev = dev;

	node = nlm_get_device_node(pci_get_slot(dev));
	freq = nlm_set_device_frequency(node, DFS_DEVICE_SAE, 250);
	if (bootverbose)
		device_printf(dev, "SAE Freq: %dMHz\n", freq);
	if(pci_get_device(dev) == PCI_DEVICE_ID_NLM_SAE) {
		device_set_desc(dev, "XLP Security Accelerator");
		sc->sc_cid = crypto_get_driverid(dev,
		    sizeof(struct xlp_sec_session), CRYPTOCAP_F_HARDWARE);
		if (sc->sc_cid < 0) {
			printf("xlp_sec - error : could not get the driver"
			    " id\n");
			goto error_exit;
		}

		base = nlm_get_sec_pcibase(node);
		qstart = nlm_qidstart(base);
		qnum = nlm_qnum(base);
		sc->sec_vc_start = qstart;
		sc->sec_vc_end = qstart + qnum - 1;
	}

	if (xlp_sec_init(sc) != 0)
		goto error_exit;
	if (bootverbose)
		device_printf(dev, "SEC Initialization complete!\n");
	return (0);

error_exit:
	return (ENXIO);

}

/*
 * Detach an interface that successfully probed.
 */
static int
xlp_sec_detach(device_t dev)
{
	return (0);
}

static bool
xlp_sec_auth_supported(const struct crypto_session_params *csp)
{

	switch (csp->csp_auth_alg) {
	case CRYPTO_SHA1:
	case CRYPTO_MD5_HMAC:
	case CRYPTO_SHA1_HMAC:
		break;
	default:
		return (false);
	}
	return (true);
}

static bool
xlp_sec_cipher_supported(const struct crypto_session_params *csp)
{

	switch (csp->csp_cipher_alg) {
	case CRYPTO_DES_CBC:
	case CRYPTO_3DES_CBC:
		if (csp->csp_ivlen != XLP_SEC_DES_IV_LENGTH)
			return (false);
		break;
	case CRYPTO_AES_CBC:
		if (csp->csp_ivlen != XLP_SEC_AES_IV_LENGTH)
			return (false);
		break;
	default:
		return (false);
	}

	return (true);
}

static int
xlp_sec_probesession(device_t dev, const struct crypto_session_params *csp)
{

	if (csp->csp_flags != 0)
		return (EINVAL);
	switch (csp->csp_mode) {
	case CSP_MODE_DIGEST:
		if (!xlp_sec_auth_supported(csp))
			return (EINVAL);
		break;
	case CSP_MODE_CIPHER:
		if (!xlp_sec_cipher_supported(csp))
			return (EINVAL);
		break;
	case CSP_MODE_ETA:
		if (!xlp_sec_auth_supported(csp) ||
		    !xlp_sec_cipher_supported(csp))
			return (EINVAL);
		break;
	default:
		return (EINVAL);
	}
	return (CRYPTODEV_PROBE_HARDWARE);
}

static int
xlp_sec_newsession(device_t dev, crypto_session_t cses,
    const struct crypto_session_params *csp)
{
	struct xlp_sec_session *ses;

	ses = crypto_get_driver_session(cses);

	if (csp->csp_auth_alg != 0) {
		if (csp->csp_auth_mlen == 0)
			ses->hs_mlen = crypto_auth_hash(csp)->hashsize;
		else
			ses->hs_mlen = csp->csp_auth_mlen;
	}

	return (0);
}

/*
 * XXX freesession routine should run a zero'd mac/encrypt key into context
 * ram.  to blow away any keys already stored there.
 */

static void
xlp_copyiv(struct xlp_sec_softc *sc, struct xlp_sec_command *cmd,
    const struct crypto_session_params *csp)
{
	struct cryptop *crp = NULL;

	crp = cmd->crp;

	if (crp->crp_flags & CRYPTO_F_IV_SEPARATE)
		memcpy(cmd->iv, crp->crp_iv, csp->csp_ivlen);
}

static int
xlp_get_nsegs(struct cryptop *crp, unsigned int *nsegs)
{

	switch (crp->crp_buf_type) {
	case CRYPTO_BUF_MBUF:
	{
		struct mbuf *m = NULL;

		m = crp->crp_mbuf;
		while (m != NULL) {
			*nsegs += NLM_CRYPTO_NUM_SEGS_REQD(m->m_len);
			m = m->m_next;
		}
		break;
	}
	case CRYPTO_BUF_UIO:
	{
		struct uio *uio = NULL;
		struct iovec *iov = NULL;
		int iol = 0;

		uio = (struct uio *)crp->crp_buf;
		iov = (struct iovec *)uio->uio_iov;
		iol = uio->uio_iovcnt;
		while (iol > 0) {
			*nsegs += NLM_CRYPTO_NUM_SEGS_REQD(iov->iov_len);
			iol--;
			iov++;
		}
		break;
	}
	case CRYPTO_BUF_CONTIG:
		*nsegs = NLM_CRYPTO_NUM_SEGS_REQD(crp->crp_ilen);
		break;
	default:
		return (EINVAL);
	}
	return (0);
}

static int
xlp_alloc_cmd_params(struct xlp_sec_command *cmd, unsigned int nsegs)
{
	int err = 0;

	if(cmd == NULL) {
		err = EINVAL;
		goto error;
	}
	if ((cmd->ctrlp = malloc(sizeof(struct nlm_crypto_pkt_ctrl), M_DEVBUF,
	    M_NOWAIT | M_ZERO)) == NULL) {
		err = ENOMEM;
		goto error;
	}
	if (((uintptr_t)cmd->ctrlp & (XLP_L2L3_CACHELINE_SIZE - 1))) {
		err = EINVAL;
		goto error;
	}
	/* (nsegs - 1) because one seg is part of the structure already */
	if ((cmd->paramp = malloc(sizeof(struct nlm_crypto_pkt_param) +
	    (16 * (nsegs - 1)), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) {
		err = ENOMEM;
		goto error;
	}
	if (((uintptr_t)cmd->paramp & (XLP_L2L3_CACHELINE_SIZE - 1))) {
		err = EINVAL;
		goto error;
	}
	if ((cmd->iv = malloc(EALG_MAX_BLOCK_LEN, M_DEVBUF,
	    M_NOWAIT | M_ZERO)) == NULL) {
		err = ENOMEM;
		goto error;
	}
	if ((cmd->hashdest = malloc(HASH_MAX_LEN, M_DEVBUF,
	    M_NOWAIT | M_ZERO)) == NULL) {
		err = ENOMEM;
		goto error;
	}
error:
	return (err);
}

static void
xlp_free_cmd_params(struct xlp_sec_command *cmd)
{
	if (cmd->ctrlp != NULL)
		free(cmd->ctrlp, M_DEVBUF);
	if (cmd->paramp != NULL)
		free(cmd->paramp, M_DEVBUF);
	if (cmd->iv != NULL)
		free(cmd->iv, M_DEVBUF);
	if (cmd->hashdest != NULL)
		free(cmd->hashdest, M_DEVBUF);
	if (cmd != NULL)
		free(cmd, M_DEVBUF);
	return;
}

static int
xlp_sec_process(device_t dev, struct cryptop *crp, int hint)
{
	struct xlp_sec_softc *sc = device_get_softc(dev);
	const struct crypto_session_params *csp;
	struct xlp_sec_command *cmd = NULL;
	int err = -1, ret = 0;
	struct xlp_sec_session *ses;
	unsigned int nsegs = 0;

	ses = crypto_get_driver_session(crp->crp_session);
	csp = crypto_get_params(crp->crp_session);

	/*
	 * This device only support AAD requests where the AAD is
	 * adjacent to the payload.
	 */
	if (crp->crp_aad_length != 0 && crp->crp_payload_start !=
	    crp->crp_aad_start + crp->crp_aad_length) {
		err = EFBIG;
		goto errout;
	}

	if ((cmd = malloc(sizeof(struct xlp_sec_command), M_DEVBUF,
	    M_NOWAIT | M_ZERO)) == NULL) {
		err = ENOMEM;
		goto errout;
	}

	cmd->crp = crp;
	cmd->ses = ses;
	cmd->hash_dst_len = ses->hs_mlen;

	if ((ret = xlp_get_nsegs(crp, &nsegs)) != 0) {
		err = EINVAL;
		goto errout;
	}

	if (crp->crp_flags & CRYPTO_F_IV_SEPARATE) {
		/* Since IV is given as separate segment to avoid copy */
		nsegs += 1;
	}
	cmd->nsegs = nsegs;

	if ((err = xlp_alloc_cmd_params(cmd, nsegs)) != 0)
		goto errout;

	switch (csp->csp_mode) {
	case CSP_MODE_CIPHER:
		if ((ret = nlm_get_cipher_param(cmd, csp)) != 0) {
			err = EINVAL;
			goto errout;
		}
		cmd->cipheroff = crp->crp_payload_start;
		cmd->cipherlen = crp->crp_payload_length;
		if (crp->crp_flags & CRYPTO_F_IV_SEPARATE) {
			cmd->cipheroff += cmd->ivlen;
			cmd->ivoff = 0;
		} else
			cmd->ivoff = crp->crp_iv_start;
		xlp_copyiv(sc, cmd, csp);
		if ((err = nlm_crypto_do_cipher(sc, cmd, csp)) != 0)
			goto errout;
		break;
	case CSP_MODE_DIGEST:
		if ((ret = nlm_get_digest_param(cmd, csp)) != 0) {
			err = EINVAL;
			goto errout;
		}
		cmd->hashoff = crp->crp_payload_start;
		cmd->hashlen = crp->crp_payload_length;
		cmd->hmacpad = 0;
		cmd->hashsrc = 0;
		if ((err = nlm_crypto_do_digest(sc, cmd, csp)) != 0)
			goto errout;
		break;
	case CSP_MODE_ETA:
		if ((ret = nlm_get_cipher_param(cmd, csp)) != 0) {
			err = EINVAL;
			goto errout;
		}
		if ((ret = nlm_get_digest_param(cmd, csp)) != 0) {
			err = EINVAL;
			goto errout;
		}
		if (crp->crp_aad_length != 0) {
			cmd->hashoff = crp->crp_aad_start;
			cmd->hashlen = crp->crp_aad_length +
			    crp->crp_payload_length;
		} else {
			cmd->hashoff = crp->crp_payload_start;
			cmd->hashlen = crp->crp_payload_length;
		}
		cmd->hmacpad = 0;
		if (CRYPTO_OP_IS_ENCRYPT(crp->crp_op))
			cmd->hashsrc = 1;
		else
			cmd->hashsrc = 0;
		cmd->cipheroff = crp->crp_payload_start;
		cmd->cipherlen = crp->crp_payload_length;
		if (crp->crp_flags & CRYPTO_F_IV_SEPARATE) {
			cmd->hashoff += cmd->ivlen;
			cmd->cipheroff += cmd->ivlen;
			cmd->ivoff = 0;
		} else
			cmd->ivoff = crp->crp_iv_start;
		xlp_copyiv(sc, cmd, csp);
		if ((err = nlm_crypto_do_cipher_digest(sc, cmd, csp)) != 0)
			goto errout;
		break;
	default:
		err = EINVAL;
		goto errout;
	}
	return (0);
errout:
	xlp_free_cmd_params(cmd);
	if (err == ERESTART) {
		sc->sc_needwakeup |= CRYPTO_SYMQ;
		creditleft = 0;
		return (err);
	}
	crp->crp_etype = err;
	crypto_done(crp);
	return (err);
}