1ef0a6e20SPawel Jakub Dawidek /*-
2ec7993f8SPawel Jakub Dawidek * Copyright (c) 2005-2008 Pawel Jakub Dawidek <pjd@FreeBSD.org>
3ef0a6e20SPawel Jakub Dawidek * All rights reserved.
4ef0a6e20SPawel Jakub Dawidek *
5ef0a6e20SPawel Jakub Dawidek * Redistribution and use in source and binary forms, with or without
6ef0a6e20SPawel Jakub Dawidek * modification, are permitted provided that the following conditions
7ef0a6e20SPawel Jakub Dawidek * are met:
8ef0a6e20SPawel Jakub Dawidek * 1. Redistributions of source code must retain the above copyright
9ef0a6e20SPawel Jakub Dawidek * notice, this list of conditions and the following disclaimer.
10ef0a6e20SPawel Jakub Dawidek * 2. Redistributions in binary form must reproduce the above copyright
11ef0a6e20SPawel Jakub Dawidek * notice, this list of conditions and the following disclaimer in the
12ef0a6e20SPawel Jakub Dawidek * documentation and/or other materials provided with the distribution.
13ef0a6e20SPawel Jakub Dawidek *
14ef0a6e20SPawel Jakub Dawidek * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15ef0a6e20SPawel Jakub Dawidek * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16ef0a6e20SPawel Jakub Dawidek * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17ef0a6e20SPawel Jakub Dawidek * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18ef0a6e20SPawel Jakub Dawidek * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19ef0a6e20SPawel Jakub Dawidek * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20ef0a6e20SPawel Jakub Dawidek * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21ef0a6e20SPawel Jakub Dawidek * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22ef0a6e20SPawel Jakub Dawidek * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23ef0a6e20SPawel Jakub Dawidek * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24ef0a6e20SPawel Jakub Dawidek * SUCH DAMAGE.
25ef0a6e20SPawel Jakub Dawidek */
26ef0a6e20SPawel Jakub Dawidek
27ef0a6e20SPawel Jakub Dawidek #include <sys/param.h>
28ef0a6e20SPawel Jakub Dawidek #include <sys/systm.h>
29ef0a6e20SPawel Jakub Dawidek #include <sys/kernel.h>
30ef0a6e20SPawel Jakub Dawidek #include <sys/module.h>
31ef0a6e20SPawel Jakub Dawidek #include <sys/lock.h>
3248aadb63SPawel Jakub Dawidek #include <sys/rwlock.h>
33ef0a6e20SPawel Jakub Dawidek #include <sys/malloc.h>
34ef0a6e20SPawel Jakub Dawidek #include <sys/libkern.h>
352b375b4eSYoshihiro Takahashi #if defined(__amd64__) || defined(__i386__)
36ef0a6e20SPawel Jakub Dawidek #include <machine/cpufunc.h>
37ef0a6e20SPawel Jakub Dawidek #include <machine/cputypes.h>
383b0e353fSJohn Baldwin #include <machine/fpu.h>
394fd58e10SMichael Reifenberger #include <machine/md_var.h>
404fd58e10SMichael Reifenberger #include <machine/specialreg.h>
41ef0a6e20SPawel Jakub Dawidek #endif
42ef0a6e20SPawel Jakub Dawidek
43ef0a6e20SPawel Jakub Dawidek #include <opencrypto/cryptodev.h>
44ef0a6e20SPawel Jakub Dawidek
455333bd47SPawel Jakub Dawidek #include <crypto/via/padlock.h>
46ef0a6e20SPawel Jakub Dawidek
476810ad6fSSam Leffler #include <sys/kobj.h>
486810ad6fSSam Leffler #include <sys/bus.h>
496810ad6fSSam Leffler #include "cryptodev_if.h"
506810ad6fSSam Leffler
515333bd47SPawel Jakub Dawidek /*
525333bd47SPawel Jakub Dawidek * Technical documentation about the PadLock engine can be found here:
535333bd47SPawel Jakub Dawidek *
545333bd47SPawel Jakub Dawidek * http://www.via.com.tw/en/downloads/whitepapers/initiatives/padlock/programming_guide.pdf
555333bd47SPawel Jakub Dawidek */
56ef0a6e20SPawel Jakub Dawidek
57ef0a6e20SPawel Jakub Dawidek struct padlock_softc {
58ef0a6e20SPawel Jakub Dawidek int32_t sc_cid;
59ef0a6e20SPawel Jakub Dawidek };
60ef0a6e20SPawel Jakub Dawidek
61c0341432SJohn Baldwin static int padlock_probesession(device_t, const struct crypto_session_params *);
62c0341432SJohn Baldwin static int padlock_newsession(device_t, crypto_session_t cses,
63c0341432SJohn Baldwin const struct crypto_session_params *);
641b0909d5SConrad Meyer static void padlock_freesession(device_t, crypto_session_t cses);
653b0e353fSJohn Baldwin static void padlock_freesession_one(struct padlock_session *ses);
666810ad6fSSam Leffler static int padlock_process(device_t, struct cryptop *crp, int hint __unused);
67ef0a6e20SPawel Jakub Dawidek
685333bd47SPawel Jakub Dawidek MALLOC_DEFINE(M_PADLOCK, "padlock_data", "PadLock Data");
69ef0a6e20SPawel Jakub Dawidek
706810ad6fSSam Leffler static void
padlock_identify(driver_t * drv,device_t parent)71a4958494SWarner Losh padlock_identify(driver_t *drv, device_t parent)
72ef0a6e20SPawel Jakub Dawidek {
736810ad6fSSam Leffler /* NB: order 10 is so we get attached after h/w devices */
746810ad6fSSam Leffler if (device_find_child(parent, "padlock", -1) == NULL &&
756810ad6fSSam Leffler BUS_ADD_CHILD(parent, 10, "padlock", -1) == 0)
766810ad6fSSam Leffler panic("padlock: could not attach");
776810ad6fSSam Leffler }
786810ad6fSSam Leffler
796810ad6fSSam Leffler static int
padlock_probe(device_t dev)806810ad6fSSam Leffler padlock_probe(device_t dev)
816810ad6fSSam Leffler {
825333bd47SPawel Jakub Dawidek char capp[256];
835333bd47SPawel Jakub Dawidek
842b375b4eSYoshihiro Takahashi #if defined(__amd64__) || defined(__i386__)
855333bd47SPawel Jakub Dawidek /* If there is no AES support, we has nothing to do here. */
864fd58e10SMichael Reifenberger if (!(via_feature_xcrypt & VIA_HAS_AES)) {
876810ad6fSSam Leffler device_printf(dev, "No ACE support.\n");
88ef0a6e20SPawel Jakub Dawidek return (EINVAL);
895333bd47SPawel Jakub Dawidek }
905333bd47SPawel Jakub Dawidek strlcpy(capp, "AES-CBC", sizeof(capp));
915333bd47SPawel Jakub Dawidek #if 0
925333bd47SPawel Jakub Dawidek strlcat(capp, ",AES-EBC", sizeof(capp));
935333bd47SPawel Jakub Dawidek strlcat(capp, ",AES-CFB", sizeof(capp));
945333bd47SPawel Jakub Dawidek strlcat(capp, ",AES-OFB", sizeof(capp));
955333bd47SPawel Jakub Dawidek #endif
965333bd47SPawel Jakub Dawidek if (via_feature_xcrypt & VIA_HAS_SHA) {
975333bd47SPawel Jakub Dawidek strlcat(capp, ",SHA1", sizeof(capp));
985333bd47SPawel Jakub Dawidek strlcat(capp, ",SHA256", sizeof(capp));
995333bd47SPawel Jakub Dawidek }
1005333bd47SPawel Jakub Dawidek #if 0
1015333bd47SPawel Jakub Dawidek if (via_feature_xcrypt & VIA_HAS_AESCTR)
1025333bd47SPawel Jakub Dawidek strlcat(capp, ",AES-CTR", sizeof(capp));
1035333bd47SPawel Jakub Dawidek if (via_feature_xcrypt & VIA_HAS_MM)
1045333bd47SPawel Jakub Dawidek strlcat(capp, ",RSA", sizeof(capp));
1055333bd47SPawel Jakub Dawidek #endif
1066810ad6fSSam Leffler device_set_desc_copy(dev, capp);
1076810ad6fSSam Leffler return (0);
108ef0a6e20SPawel Jakub Dawidek #else
109ef0a6e20SPawel Jakub Dawidek return (EINVAL);
110ef0a6e20SPawel Jakub Dawidek #endif
1116810ad6fSSam Leffler }
112ef0a6e20SPawel Jakub Dawidek
1136810ad6fSSam Leffler static int
padlock_attach(device_t dev)1146810ad6fSSam Leffler padlock_attach(device_t dev)
1156810ad6fSSam Leffler {
1166810ad6fSSam Leffler struct padlock_softc *sc = device_get_softc(dev);
1176810ad6fSSam Leffler
1181b0909d5SConrad Meyer sc->sc_cid = crypto_get_driverid(dev, sizeof(struct padlock_session),
119a3d565a1SJohn Baldwin CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_SYNC |
120a3d565a1SJohn Baldwin CRYPTOCAP_F_ACCEL_SOFTWARE);
121ef0a6e20SPawel Jakub Dawidek if (sc->sc_cid < 0) {
1226810ad6fSSam Leffler device_printf(dev, "Could not get crypto driver id.\n");
123ef0a6e20SPawel Jakub Dawidek return (ENOMEM);
124ef0a6e20SPawel Jakub Dawidek }
125ef0a6e20SPawel Jakub Dawidek
126ef0a6e20SPawel Jakub Dawidek return (0);
127ef0a6e20SPawel Jakub Dawidek }
128ef0a6e20SPawel Jakub Dawidek
129ef0a6e20SPawel Jakub Dawidek static int
padlock_detach(device_t dev)1306810ad6fSSam Leffler padlock_detach(device_t dev)
131ef0a6e20SPawel Jakub Dawidek {
1326810ad6fSSam Leffler struct padlock_softc *sc = device_get_softc(dev);
133ef0a6e20SPawel Jakub Dawidek
134ef0a6e20SPawel Jakub Dawidek crypto_unregister_all(sc->sc_cid);
135ef0a6e20SPawel Jakub Dawidek return (0);
136ef0a6e20SPawel Jakub Dawidek }
137ef0a6e20SPawel Jakub Dawidek
138ef0a6e20SPawel Jakub Dawidek static int
padlock_probesession(device_t dev,const struct crypto_session_params * csp)139c0341432SJohn Baldwin padlock_probesession(device_t dev, const struct crypto_session_params *csp)
140ef0a6e20SPawel Jakub Dawidek {
141ef0a6e20SPawel Jakub Dawidek
142c0341432SJohn Baldwin if (csp->csp_flags != 0)
14364e18040SPawel Jakub Dawidek return (EINVAL);
14464e18040SPawel Jakub Dawidek
14564e18040SPawel Jakub Dawidek /*
14664e18040SPawel Jakub Dawidek * We only support HMAC algorithms to be able to work with
147b2630c29SGeorge V. Neville-Neil * ipsec(4), so if we are asked only for authentication without
148c0341432SJohn Baldwin * encryption, don't pretend we can accelerate it.
149c0341432SJohn Baldwin *
150c0341432SJohn Baldwin * XXX: For CPUs with SHA instructions we should probably
151c0341432SJohn Baldwin * permit CSP_MODE_DIGEST so that those can be tested.
15264e18040SPawel Jakub Dawidek */
153c0341432SJohn Baldwin switch (csp->csp_mode) {
154c0341432SJohn Baldwin case CSP_MODE_ETA:
155c0341432SJohn Baldwin if (!padlock_hash_check(csp))
15664e18040SPawel Jakub Dawidek return (EINVAL);
157c0341432SJohn Baldwin /* FALLTHROUGH */
158c0341432SJohn Baldwin case CSP_MODE_CIPHER:
159c0341432SJohn Baldwin switch (csp->csp_cipher_alg) {
160c0341432SJohn Baldwin case CRYPTO_AES_CBC:
161c0341432SJohn Baldwin if (csp->csp_ivlen != AES_BLOCK_LEN)
162c0341432SJohn Baldwin return (EINVAL);
163c0341432SJohn Baldwin break;
164c0341432SJohn Baldwin default:
165c0341432SJohn Baldwin return (EINVAL);
166c0341432SJohn Baldwin }
167c0341432SJohn Baldwin break;
168c0341432SJohn Baldwin default:
169c0341432SJohn Baldwin return (EINVAL);
170c0341432SJohn Baldwin }
171c0341432SJohn Baldwin
172c0341432SJohn Baldwin return (CRYPTODEV_PROBE_ACCEL_SOFTWARE);
173c0341432SJohn Baldwin }
174c0341432SJohn Baldwin
175c0341432SJohn Baldwin static int
padlock_newsession(device_t dev,crypto_session_t cses,const struct crypto_session_params * csp)176c0341432SJohn Baldwin padlock_newsession(device_t dev, crypto_session_t cses,
177c0341432SJohn Baldwin const struct crypto_session_params *csp)
178c0341432SJohn Baldwin {
1793b0e353fSJohn Baldwin struct padlock_session *ses;
180c0341432SJohn Baldwin struct thread *td;
181c0341432SJohn Baldwin int error;
182ef0a6e20SPawel Jakub Dawidek
1831b0909d5SConrad Meyer ses = crypto_get_driver_session(cses);
184ef0a6e20SPawel Jakub Dawidek
185c0341432SJohn Baldwin error = padlock_cipher_setup(ses, csp);
1865333bd47SPawel Jakub Dawidek if (error != 0) {
1873b0e353fSJohn Baldwin padlock_freesession_one(ses);
1885333bd47SPawel Jakub Dawidek return (error);
189ef0a6e20SPawel Jakub Dawidek }
190ef0a6e20SPawel Jakub Dawidek
191c0341432SJohn Baldwin if (csp->csp_mode == CSP_MODE_ETA) {
19204c49e68SKonstantin Belousov td = curthread;
1933b0e353fSJohn Baldwin fpu_kern_enter(td, NULL, FPU_KERN_NORMAL | FPU_KERN_NOCTX);
194c0341432SJohn Baldwin error = padlock_hash_setup(ses, csp);
1953b0e353fSJohn Baldwin fpu_kern_leave(td, NULL);
1965333bd47SPawel Jakub Dawidek if (error != 0) {
1973b0e353fSJohn Baldwin padlock_freesession_one(ses);
1985333bd47SPawel Jakub Dawidek return (error);
19964e18040SPawel Jakub Dawidek }
200ef0a6e20SPawel Jakub Dawidek }
201ef0a6e20SPawel Jakub Dawidek
202ef0a6e20SPawel Jakub Dawidek return (0);
203ef0a6e20SPawel Jakub Dawidek }
204ef0a6e20SPawel Jakub Dawidek
205ec7993f8SPawel Jakub Dawidek static void
padlock_freesession_one(struct padlock_session * ses)2063b0e353fSJohn Baldwin padlock_freesession_one(struct padlock_session *ses)
207ec7993f8SPawel Jakub Dawidek {
208ec7993f8SPawel Jakub Dawidek
209ec7993f8SPawel Jakub Dawidek padlock_hash_free(ses);
210ec7993f8SPawel Jakub Dawidek }
211ec7993f8SPawel Jakub Dawidek
2121b0909d5SConrad Meyer static void
padlock_freesession(device_t dev,crypto_session_t cses)2131b0909d5SConrad Meyer padlock_freesession(device_t dev, crypto_session_t cses)
214ef0a6e20SPawel Jakub Dawidek {
215ef0a6e20SPawel Jakub Dawidek struct padlock_session *ses;
216ef0a6e20SPawel Jakub Dawidek
2171b0909d5SConrad Meyer ses = crypto_get_driver_session(cses);
2183b0e353fSJohn Baldwin padlock_freesession_one(ses);
219ef0a6e20SPawel Jakub Dawidek }
220ef0a6e20SPawel Jakub Dawidek
221ef0a6e20SPawel Jakub Dawidek static int
padlock_process(device_t dev,struct cryptop * crp,int hint __unused)2226810ad6fSSam Leffler padlock_process(device_t dev, struct cryptop *crp, int hint __unused)
223ef0a6e20SPawel Jakub Dawidek {
224c0341432SJohn Baldwin const struct crypto_session_params *csp;
225c0341432SJohn Baldwin struct padlock_session *ses;
226c0341432SJohn Baldwin int error;
227ef0a6e20SPawel Jakub Dawidek
228c0341432SJohn Baldwin if ((crp->crp_payload_length % AES_BLOCK_LEN) != 0) {
22964e18040SPawel Jakub Dawidek error = EINVAL;
230eb340a61SPawel Jakub Dawidek goto out;
231eb340a61SPawel Jakub Dawidek }
232ef0a6e20SPawel Jakub Dawidek
2331b0909d5SConrad Meyer ses = crypto_get_driver_session(crp->crp_session);
234c0341432SJohn Baldwin csp = crypto_get_params(crp->crp_session);
235ef0a6e20SPawel Jakub Dawidek
236c0341432SJohn Baldwin /* Perform data authentication if requested before decryption. */
237c0341432SJohn Baldwin if (csp->csp_mode == CSP_MODE_ETA &&
238c0341432SJohn Baldwin !CRYPTO_OP_IS_ENCRYPT(crp->crp_op)) {
239c0341432SJohn Baldwin error = padlock_hash_process(ses, crp, csp);
24064e18040SPawel Jakub Dawidek if (error != 0)
24164e18040SPawel Jakub Dawidek goto out;
242ef0a6e20SPawel Jakub Dawidek }
243ef0a6e20SPawel Jakub Dawidek
244c0341432SJohn Baldwin error = padlock_cipher_process(ses, crp, csp);
2455333bd47SPawel Jakub Dawidek if (error != 0)
2465333bd47SPawel Jakub Dawidek goto out;
24764e18040SPawel Jakub Dawidek
24864e18040SPawel Jakub Dawidek /* Perform data authentication if requested after encryption. */
249c0341432SJohn Baldwin if (csp->csp_mode == CSP_MODE_ETA &&
250c0341432SJohn Baldwin CRYPTO_OP_IS_ENCRYPT(crp->crp_op)) {
251c0341432SJohn Baldwin error = padlock_hash_process(ses, crp, csp);
25264e18040SPawel Jakub Dawidek if (error != 0)
25364e18040SPawel Jakub Dawidek goto out;
254ef0a6e20SPawel Jakub Dawidek }
255ef0a6e20SPawel Jakub Dawidek
256ef0a6e20SPawel Jakub Dawidek out:
2575333bd47SPawel Jakub Dawidek #if 0
2585333bd47SPawel Jakub Dawidek /*
2595333bd47SPawel Jakub Dawidek * This code is not necessary, because contexts will be freed on next
2605333bd47SPawel Jakub Dawidek * padlock_setup_mackey() call or at padlock_freesession() call.
2615333bd47SPawel Jakub Dawidek */
2625333bd47SPawel Jakub Dawidek if (ses != NULL && maccrd != NULL &&
2635333bd47SPawel Jakub Dawidek (maccrd->crd_flags & CRD_F_KEY_EXPLICIT) != 0) {
2645333bd47SPawel Jakub Dawidek padlock_free_ctx(ses->ses_axf, ses->ses_ictx);
2655333bd47SPawel Jakub Dawidek padlock_free_ctx(ses->ses_axf, ses->ses_octx);
266ef0a6e20SPawel Jakub Dawidek }
2675333bd47SPawel Jakub Dawidek #endif
26864e18040SPawel Jakub Dawidek crp->crp_etype = error;
269ef0a6e20SPawel Jakub Dawidek crypto_done(crp);
270dbc973caSAlan Somers return (0);
271ef0a6e20SPawel Jakub Dawidek }
272ef0a6e20SPawel Jakub Dawidek
2736810ad6fSSam Leffler static device_method_t padlock_methods[] = {
2746810ad6fSSam Leffler DEVMETHOD(device_identify, padlock_identify),
2756810ad6fSSam Leffler DEVMETHOD(device_probe, padlock_probe),
2766810ad6fSSam Leffler DEVMETHOD(device_attach, padlock_attach),
2776810ad6fSSam Leffler DEVMETHOD(device_detach, padlock_detach),
278ef0a6e20SPawel Jakub Dawidek
279c0341432SJohn Baldwin DEVMETHOD(cryptodev_probesession, padlock_probesession),
2806810ad6fSSam Leffler DEVMETHOD(cryptodev_newsession, padlock_newsession),
2816810ad6fSSam Leffler DEVMETHOD(cryptodev_freesession,padlock_freesession),
2826810ad6fSSam Leffler DEVMETHOD(cryptodev_process, padlock_process),
283ef0a6e20SPawel Jakub Dawidek
2846810ad6fSSam Leffler {0, 0},
285ef0a6e20SPawel Jakub Dawidek };
2866810ad6fSSam Leffler
2876810ad6fSSam Leffler static driver_t padlock_driver = {
2886810ad6fSSam Leffler "padlock",
2896810ad6fSSam Leffler padlock_methods,
2906810ad6fSSam Leffler sizeof(struct padlock_softc),
2916810ad6fSSam Leffler };
2926810ad6fSSam Leffler
2936810ad6fSSam Leffler /* XXX where to attach */
294ab050b2bSJohn Baldwin DRIVER_MODULE(padlock, nexus, padlock_driver, 0, 0);
295ef0a6e20SPawel Jakub Dawidek MODULE_VERSION(padlock, 1);
296ef0a6e20SPawel Jakub Dawidek MODULE_DEPEND(padlock, crypto, 1, 1, 1);
297