2 * Copyright (c) 2005-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
35 #include <sys/mutex.h>
36 #include <sys/malloc.h>
37 #include <sys/libkern.h>
38 #if defined(__i386__) && !defined(PC98)
39 #include <machine/cpufunc.h>
40 #include <machine/cputypes.h>
41 #include <machine/md_var.h>
42 #include <machine/specialreg.h>
45 #include <opencrypto/cryptodev.h>
47 #include <crypto/via/padlock.h>
51 #include "cryptodev_if.h"
54 * Technical documentation about the PadLock engine can be found here:
56 * http://www.via.com.tw/en/downloads/whitepapers/initiatives/padlock/programming_guide.pdf
59 struct padlock_softc {
62 TAILQ_HEAD(, padlock_session) sc_sessions;
63 struct mtx sc_sessions_mtx;
66 static int padlock_newsession(device_t, uint32_t *sidp, struct cryptoini *cri);
67 static int padlock_freesession(device_t, uint64_t tid);
68 static int padlock_process(device_t, struct cryptop *crp, int hint __unused);
70 MALLOC_DEFINE(M_PADLOCK, "padlock_data", "PadLock Data");
73 padlock_identify(device_t *dev, device_t parent)
75 /* NB: order 10 is so we get attached after h/w devices */
76 if (device_find_child(parent, "padlock", -1) == NULL &&
77 BUS_ADD_CHILD(parent, 10, "padlock", -1) == 0)
78 panic("padlock: could not attach");
82 padlock_probe(device_t dev)
86 #if defined(__i386__) && !defined(PC98)
87 /* If there is no AES support, we has nothing to do here. */
88 if (!(via_feature_xcrypt & VIA_HAS_AES)) {
89 device_printf(dev, "No ACE support.\n");
92 strlcpy(capp, "AES-CBC", sizeof(capp));
94 strlcat(capp, ",AES-EBC", sizeof(capp));
95 strlcat(capp, ",AES-CFB", sizeof(capp));
96 strlcat(capp, ",AES-OFB", sizeof(capp));
98 if (via_feature_xcrypt & VIA_HAS_SHA) {
99 strlcat(capp, ",SHA1", sizeof(capp));
100 strlcat(capp, ",SHA256", sizeof(capp));
103 if (via_feature_xcrypt & VIA_HAS_AESCTR)
104 strlcat(capp, ",AES-CTR", sizeof(capp));
105 if (via_feature_xcrypt & VIA_HAS_MM)
106 strlcat(capp, ",RSA", sizeof(capp));
108 device_set_desc_copy(dev, capp);
116 padlock_attach(device_t dev)
118 struct padlock_softc *sc = device_get_softc(dev);
120 TAILQ_INIT(&sc->sc_sessions);
123 sc->sc_cid = crypto_get_driverid(dev, CRYPTOCAP_F_HARDWARE);
124 if (sc->sc_cid < 0) {
125 device_printf(dev, "Could not get crypto driver id.\n");
129 mtx_init(&sc->sc_sessions_mtx, "padlock_mtx", NULL, MTX_DEF);
130 crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0);
131 crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0);
132 crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0);
133 crypto_register(sc->sc_cid, CRYPTO_RIPEMD160_HMAC, 0, 0);
134 crypto_register(sc->sc_cid, CRYPTO_SHA2_256_HMAC, 0, 0);
135 crypto_register(sc->sc_cid, CRYPTO_SHA2_384_HMAC, 0, 0);
136 crypto_register(sc->sc_cid, CRYPTO_SHA2_512_HMAC, 0, 0);
141 padlock_detach(device_t dev)
143 struct padlock_softc *sc = device_get_softc(dev);
144 struct padlock_session *ses;
146 mtx_lock(&sc->sc_sessions_mtx);
147 TAILQ_FOREACH(ses, &sc->sc_sessions, ses_next) {
149 mtx_unlock(&sc->sc_sessions_mtx);
151 "Cannot detach, sessions still active.\n");
155 for (ses = TAILQ_FIRST(&sc->sc_sessions); ses != NULL;
156 ses = TAILQ_FIRST(&sc->sc_sessions)) {
157 TAILQ_REMOVE(&sc->sc_sessions, ses, ses_next);
158 free(ses, M_PADLOCK);
160 mtx_destroy(&sc->sc_sessions_mtx);
161 crypto_unregister_all(sc->sc_cid);
166 padlock_newsession(device_t dev, uint32_t *sidp, struct cryptoini *cri)
168 struct padlock_softc *sc = device_get_softc(dev);
169 struct padlock_session *ses = NULL;
170 struct cryptoini *encini, *macini;
173 if (sidp == NULL || cri == NULL)
176 encini = macini = NULL;
177 for (; cri != NULL; cri = cri->cri_next) {
178 switch (cri->cri_alg) {
179 case CRYPTO_NULL_HMAC:
180 case CRYPTO_MD5_HMAC:
181 case CRYPTO_SHA1_HMAC:
182 case CRYPTO_RIPEMD160_HMAC:
183 case CRYPTO_SHA2_256_HMAC:
184 case CRYPTO_SHA2_384_HMAC:
185 case CRYPTO_SHA2_512_HMAC:
201 * We only support HMAC algorithms to be able to work with
202 * ipsec(4), so if we are asked only for authentication without
203 * encryption, don't pretend we can accellerate it.
209 * Let's look for a free session structure.
211 mtx_lock(&sc->sc_sessions_mtx);
213 * Free sessions goes first, so if first session is used, we need to
216 ses = TAILQ_FIRST(&sc->sc_sessions);
217 if (ses == NULL || ses->ses_used)
220 TAILQ_REMOVE(&sc->sc_sessions, ses, ses_next);
222 TAILQ_INSERT_TAIL(&sc->sc_sessions, ses, ses_next);
224 mtx_unlock(&sc->sc_sessions_mtx);
226 ses = malloc(sizeof(*ses), M_PADLOCK, M_NOWAIT | M_ZERO);
230 mtx_lock(&sc->sc_sessions_mtx);
231 ses->ses_id = sc->sc_sid++;
232 TAILQ_INSERT_TAIL(&sc->sc_sessions, ses, ses_next);
233 mtx_unlock(&sc->sc_sessions_mtx);
236 error = padlock_cipher_setup(ses, encini);
238 padlock_freesession(NULL, ses->ses_id);
242 if (macini != NULL) {
243 error = padlock_hash_setup(ses, macini);
245 padlock_freesession(NULL, ses->ses_id);
255 padlock_freesession(device_t dev, uint64_t tid)
257 struct padlock_softc *sc = device_get_softc(dev);
258 struct padlock_session *ses;
259 uint32_t sid = ((uint32_t)tid) & 0xffffffff;
261 mtx_lock(&sc->sc_sessions_mtx);
262 TAILQ_FOREACH(ses, &sc->sc_sessions, ses_next) {
263 if (ses->ses_id == sid)
267 mtx_unlock(&sc->sc_sessions_mtx);
270 TAILQ_REMOVE(&sc->sc_sessions, ses, ses_next);
271 padlock_hash_free(ses);
272 bzero(ses, sizeof(*ses));
274 TAILQ_INSERT_TAIL(&sc->sc_sessions, ses, ses_next);
275 mtx_unlock(&sc->sc_sessions_mtx);
280 padlock_process(device_t dev, struct cryptop *crp, int hint __unused)
282 struct padlock_softc *sc = device_get_softc(dev);
283 struct padlock_session *ses = NULL;
284 struct cryptodesc *crd, *enccrd, *maccrd;
287 enccrd = maccrd = NULL;
289 if (crp == NULL || crp->crp_callback == NULL || crp->crp_desc == NULL) {
294 for (crd = crp->crp_desc; crd != NULL; crd = crd->crd_next) {
295 switch (crd->crd_alg) {
296 case CRYPTO_NULL_HMAC:
297 case CRYPTO_MD5_HMAC:
298 case CRYPTO_SHA1_HMAC:
299 case CRYPTO_RIPEMD160_HMAC:
300 case CRYPTO_SHA2_256_HMAC:
301 case CRYPTO_SHA2_384_HMAC:
302 case CRYPTO_SHA2_512_HMAC:
303 if (maccrd != NULL) {
310 if (enccrd != NULL) {
320 if (enccrd == NULL || (enccrd->crd_len % AES_BLOCK_LEN) != 0) {
325 mtx_lock(&sc->sc_sessions_mtx);
326 TAILQ_FOREACH(ses, &sc->sc_sessions, ses_next) {
327 if (ses->ses_id == (crp->crp_sid & 0xffffffff))
330 mtx_unlock(&sc->sc_sessions_mtx);
336 /* Perform data authentication if requested before encryption. */
337 if (maccrd != NULL && maccrd->crd_next == enccrd) {
338 error = padlock_hash_process(ses, maccrd, crp);
343 error = padlock_cipher_process(ses, enccrd, crp);
347 /* Perform data authentication if requested after encryption. */
348 if (maccrd != NULL && enccrd->crd_next == maccrd) {
349 error = padlock_hash_process(ses, maccrd, crp);
357 * This code is not necessary, because contexts will be freed on next
358 * padlock_setup_mackey() call or at padlock_freesession() call.
360 if (ses != NULL && maccrd != NULL &&
361 (maccrd->crd_flags & CRD_F_KEY_EXPLICIT) != 0) {
362 padlock_free_ctx(ses->ses_axf, ses->ses_ictx);
363 padlock_free_ctx(ses->ses_axf, ses->ses_octx);
366 crp->crp_etype = error;
371 static device_method_t padlock_methods[] = {
372 DEVMETHOD(device_identify, padlock_identify),
373 DEVMETHOD(device_probe, padlock_probe),
374 DEVMETHOD(device_attach, padlock_attach),
375 DEVMETHOD(device_detach, padlock_detach),
377 DEVMETHOD(cryptodev_newsession, padlock_newsession),
378 DEVMETHOD(cryptodev_freesession,padlock_freesession),
379 DEVMETHOD(cryptodev_process, padlock_process),
384 static driver_t padlock_driver = {
387 sizeof(struct padlock_softc),
389 static devclass_t padlock_devclass;
391 /* XXX where to attach */
392 DRIVER_MODULE(padlock, nexus, padlock_driver, padlock_devclass, 0, 0);
393 MODULE_VERSION(padlock, 1);
394 MODULE_DEPEND(padlock, crypto, 1, 1, 1);