2 * Copyright (c) 2005-2008 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/rwlock.h>
36 #include <sys/malloc.h>
37 #include <sys/libkern.h>
38 #if defined(__amd64__) || defined(__i386__)
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 {
63 static int padlock_newsession(device_t, crypto_session_t cses, struct cryptoini *cri);
64 static void padlock_freesession(device_t, crypto_session_t cses);
65 static void padlock_freesession_one(struct padlock_softc *sc,
66 struct padlock_session *ses);
67 static int padlock_process(device_t, struct cryptop *crp, int hint __unused);
69 MALLOC_DEFINE(M_PADLOCK, "padlock_data", "PadLock Data");
72 padlock_identify(driver_t *drv, device_t parent)
74 /* NB: order 10 is so we get attached after h/w devices */
75 if (device_find_child(parent, "padlock", -1) == NULL &&
76 BUS_ADD_CHILD(parent, 10, "padlock", -1) == 0)
77 panic("padlock: could not attach");
81 padlock_probe(device_t dev)
85 #if defined(__amd64__) || defined(__i386__)
86 /* If there is no AES support, we has nothing to do here. */
87 if (!(via_feature_xcrypt & VIA_HAS_AES)) {
88 device_printf(dev, "No ACE support.\n");
91 strlcpy(capp, "AES-CBC", sizeof(capp));
93 strlcat(capp, ",AES-EBC", sizeof(capp));
94 strlcat(capp, ",AES-CFB", sizeof(capp));
95 strlcat(capp, ",AES-OFB", sizeof(capp));
97 if (via_feature_xcrypt & VIA_HAS_SHA) {
98 strlcat(capp, ",SHA1", sizeof(capp));
99 strlcat(capp, ",SHA256", sizeof(capp));
102 if (via_feature_xcrypt & VIA_HAS_AESCTR)
103 strlcat(capp, ",AES-CTR", sizeof(capp));
104 if (via_feature_xcrypt & VIA_HAS_MM)
105 strlcat(capp, ",RSA", sizeof(capp));
107 device_set_desc_copy(dev, capp);
115 padlock_attach(device_t dev)
117 struct padlock_softc *sc = device_get_softc(dev);
119 sc->sc_cid = crypto_get_driverid(dev, sizeof(struct padlock_session),
120 CRYPTOCAP_F_HARDWARE);
121 if (sc->sc_cid < 0) {
122 device_printf(dev, "Could not get crypto driver id.\n");
126 crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0);
127 crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0);
128 crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0);
129 crypto_register(sc->sc_cid, CRYPTO_RIPEMD160_HMAC, 0, 0);
130 crypto_register(sc->sc_cid, CRYPTO_SHA2_256_HMAC, 0, 0);
131 crypto_register(sc->sc_cid, CRYPTO_SHA2_384_HMAC, 0, 0);
132 crypto_register(sc->sc_cid, CRYPTO_SHA2_512_HMAC, 0, 0);
137 padlock_detach(device_t dev)
139 struct padlock_softc *sc = device_get_softc(dev);
141 crypto_unregister_all(sc->sc_cid);
146 padlock_newsession(device_t dev, crypto_session_t cses, struct cryptoini *cri)
148 struct padlock_softc *sc = device_get_softc(dev);
149 struct padlock_session *ses = NULL;
150 struct cryptoini *encini, *macini;
157 encini = macini = NULL;
158 for (; cri != NULL; cri = cri->cri_next) {
159 switch (cri->cri_alg) {
160 case CRYPTO_NULL_HMAC:
161 case CRYPTO_MD5_HMAC:
162 case CRYPTO_SHA1_HMAC:
163 case CRYPTO_RIPEMD160_HMAC:
164 case CRYPTO_SHA2_256_HMAC:
165 case CRYPTO_SHA2_384_HMAC:
166 case CRYPTO_SHA2_512_HMAC:
182 * We only support HMAC algorithms to be able to work with
183 * ipsec(4), so if we are asked only for authentication without
184 * encryption, don't pretend we can accellerate it.
189 ses = crypto_get_driver_session(cses);
190 ses->ses_fpu_ctx = fpu_kern_alloc_ctx(FPU_KERN_NORMAL);
192 error = padlock_cipher_setup(ses, encini);
194 padlock_freesession_one(sc, ses);
198 if (macini != NULL) {
200 fpu_kern_enter(td, ses->ses_fpu_ctx, FPU_KERN_NORMAL |
202 error = padlock_hash_setup(ses, macini);
203 fpu_kern_leave(td, ses->ses_fpu_ctx);
205 padlock_freesession_one(sc, ses);
214 padlock_freesession_one(struct padlock_softc *sc, struct padlock_session *ses)
217 padlock_hash_free(ses);
218 fpu_kern_free_ctx(ses->ses_fpu_ctx);
222 padlock_freesession(device_t dev, crypto_session_t cses)
224 struct padlock_softc *sc = device_get_softc(dev);
225 struct padlock_session *ses;
227 ses = crypto_get_driver_session(cses);
228 padlock_freesession_one(sc, ses);
232 padlock_process(device_t dev, struct cryptop *crp, int hint __unused)
234 struct padlock_session *ses = NULL;
235 struct cryptodesc *crd, *enccrd, *maccrd;
238 enccrd = maccrd = NULL;
244 if (crp->crp_callback == NULL || crp->crp_desc == NULL) {
249 for (crd = crp->crp_desc; crd != NULL; crd = crd->crd_next) {
250 switch (crd->crd_alg) {
251 case CRYPTO_NULL_HMAC:
252 case CRYPTO_MD5_HMAC:
253 case CRYPTO_SHA1_HMAC:
254 case CRYPTO_RIPEMD160_HMAC:
255 case CRYPTO_SHA2_256_HMAC:
256 case CRYPTO_SHA2_384_HMAC:
257 case CRYPTO_SHA2_512_HMAC:
258 if (maccrd != NULL) {
265 if (enccrd != NULL) {
275 if (enccrd == NULL || (enccrd->crd_len % AES_BLOCK_LEN) != 0) {
280 ses = crypto_get_driver_session(crp->crp_session);
282 /* Perform data authentication if requested before encryption. */
283 if (maccrd != NULL && maccrd->crd_next == enccrd) {
284 error = padlock_hash_process(ses, maccrd, crp);
289 error = padlock_cipher_process(ses, enccrd, crp);
293 /* Perform data authentication if requested after encryption. */
294 if (maccrd != NULL && enccrd->crd_next == maccrd) {
295 error = padlock_hash_process(ses, maccrd, crp);
303 * This code is not necessary, because contexts will be freed on next
304 * padlock_setup_mackey() call or at padlock_freesession() call.
306 if (ses != NULL && maccrd != NULL &&
307 (maccrd->crd_flags & CRD_F_KEY_EXPLICIT) != 0) {
308 padlock_free_ctx(ses->ses_axf, ses->ses_ictx);
309 padlock_free_ctx(ses->ses_axf, ses->ses_octx);
312 crp->crp_etype = error;
317 static device_method_t padlock_methods[] = {
318 DEVMETHOD(device_identify, padlock_identify),
319 DEVMETHOD(device_probe, padlock_probe),
320 DEVMETHOD(device_attach, padlock_attach),
321 DEVMETHOD(device_detach, padlock_detach),
323 DEVMETHOD(cryptodev_newsession, padlock_newsession),
324 DEVMETHOD(cryptodev_freesession,padlock_freesession),
325 DEVMETHOD(cryptodev_process, padlock_process),
330 static driver_t padlock_driver = {
333 sizeof(struct padlock_softc),
335 static devclass_t padlock_devclass;
337 /* XXX where to attach */
338 DRIVER_MODULE(padlock, nexus, padlock_driver, padlock_devclass, 0, 0);
339 MODULE_VERSION(padlock, 1);
340 MODULE_DEPEND(padlock, crypto, 1, 1, 1);