2 * Copyright (c) 2005-2008 Pawel Jakub Dawidek <pjd@FreeBSD.org>
3 * Copyright (c) 2010 Konstantin Belousov <kib@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
35 #include <sys/libkern.h>
37 #include <sys/module.h>
38 #include <sys/malloc.h>
39 #include <sys/rwlock.h>
42 #include <crypto/aesni/aesni.h>
43 #include "cryptodev_if.h"
48 TAILQ_HEAD(aesni_sessions_head, aesni_session) sessions;
52 static int aesni_newsession(device_t, uint32_t *sidp, struct cryptoini *cri);
53 static int aesni_freesession(device_t, uint64_t tid);
54 static void aesni_freesession_locked(struct aesni_softc *sc,
55 struct aesni_session *ses);
57 MALLOC_DEFINE(M_AESNI, "aesni_data", "AESNI Data");
60 aesni_identify(driver_t *drv, device_t parent)
63 /* NB: order 10 is so we get attached after h/w devices */
64 if (device_find_child(parent, "aesni", -1) == NULL &&
65 BUS_ADD_CHILD(parent, 10, "aesni", -1) == 0)
66 panic("aesni: could not attach");
70 aesni_probe(device_t dev)
73 if ((cpu_feature2 & CPUID2_AESNI) == 0) {
74 device_printf(dev, "No AESNI support.\n");
77 device_set_desc_copy(dev, "AES-CBC,AES-XTS");
82 aesni_attach(device_t dev)
84 struct aesni_softc *sc;
86 sc = device_get_softc(dev);
87 TAILQ_INIT(&sc->sessions);
89 sc->cid = crypto_get_driverid(dev, CRYPTOCAP_F_HARDWARE);
91 device_printf(dev, "Could not get crypto driver id.\n");
95 rw_init(&sc->lock, "aesni_lock");
96 crypto_register(sc->cid, CRYPTO_AES_CBC, 0, 0);
97 crypto_register(sc->cid, CRYPTO_AES_XTS, 0, 0);
102 aesni_detach(device_t dev)
104 struct aesni_softc *sc;
105 struct aesni_session *ses;
107 sc = device_get_softc(dev);
109 TAILQ_FOREACH(ses, &sc->sessions, next) {
111 rw_wunlock(&sc->lock);
113 "Cannot detach, sessions still active.\n");
117 while ((ses = TAILQ_FIRST(&sc->sessions)) != NULL) {
118 TAILQ_REMOVE(&sc->sessions, ses, next);
121 rw_wunlock(&sc->lock);
122 rw_destroy(&sc->lock);
123 crypto_unregister_all(sc->cid);
128 aesni_newsession(device_t dev, uint32_t *sidp, struct cryptoini *cri)
130 struct aesni_softc *sc;
131 struct aesni_session *ses;
132 struct cryptoini *encini;
135 if (sidp == NULL || cri == NULL)
138 sc = device_get_softc(dev);
141 for (; cri != NULL; cri = cri->cri_next) {
142 switch (cri->cri_alg) {
158 * Free sessions goes first, so if first session is used, we need to
161 ses = TAILQ_FIRST(&sc->sessions);
162 if (ses == NULL || ses->used) {
163 ses = malloc(sizeof(*ses), M_AESNI, M_NOWAIT | M_ZERO);
165 rw_wunlock(&sc->lock);
168 KASSERT(((uintptr_t)ses) % 0x10 == 0,
169 ("malloc returned unaligned pointer"));
172 TAILQ_REMOVE(&sc->sessions, ses, next);
175 TAILQ_INSERT_TAIL(&sc->sessions, ses, next);
176 rw_wunlock(&sc->lock);
177 ses->algo = encini->cri_alg;
179 error = aesni_cipher_setup(ses, encini);
182 aesni_freesession_locked(sc, ses);
183 rw_wunlock(&sc->lock);
192 aesni_freesession_locked(struct aesni_softc *sc, struct aesni_session *ses)
197 TAILQ_REMOVE(&sc->sessions, ses, next);
198 bzero(ses, sizeof(*ses));
200 TAILQ_INSERT_HEAD(&sc->sessions, ses, next);
204 aesni_freesession(device_t dev, uint64_t tid)
206 struct aesni_softc *sc;
207 struct aesni_session *ses;
210 sc = device_get_softc(dev);
211 sid = ((uint32_t)tid) & 0xffffffff;
213 TAILQ_FOREACH_REVERSE(ses, &sc->sessions, aesni_sessions_head, next) {
218 rw_wunlock(&sc->lock);
221 aesni_freesession_locked(sc, ses);
222 rw_wunlock(&sc->lock);
227 aesni_process(device_t dev, struct cryptop *crp, int hint __unused)
229 struct aesni_softc *sc = device_get_softc(dev);
230 struct aesni_session *ses = NULL;
231 struct cryptodesc *crd, *enccrd;
241 if (crp->crp_callback == NULL || crp->crp_desc == NULL) {
246 for (crd = crp->crp_desc; crd != NULL; crd = crd->crd_next) {
247 switch (crd->crd_alg) {
250 if (enccrd != NULL) {
260 if (enccrd == NULL || (enccrd->crd_len % AES_BLOCK_LEN) != 0) {
266 TAILQ_FOREACH_REVERSE(ses, &sc->sessions, aesni_sessions_head, next) {
267 if (ses->id == (crp->crp_sid & 0xffffffff))
270 rw_runlock(&sc->lock);
276 error = aesni_cipher_process(ses, enccrd, crp);
281 crp->crp_etype = error;
287 aesni_cipher_alloc(struct cryptodesc *enccrd, struct cryptop *crp,
294 if (crp->crp_flags & CRYPTO_F_IMBUF)
296 else if (crp->crp_flags & CRYPTO_F_IOV) {
297 uio = (struct uio *)crp->crp_buf;
298 if (uio->uio_iovcnt != 1)
301 addr = (u_char *)iov->iov_base + enccrd->crd_skip;
303 addr = (u_char *)crp->crp_buf;
308 addr = malloc(enccrd->crd_len, M_AESNI, M_NOWAIT);
311 crypto_copydata(crp->crp_flags, crp->crp_buf, enccrd->crd_skip,
312 enccrd->crd_len, addr);
318 static device_method_t aesni_methods[] = {
319 DEVMETHOD(device_identify, aesni_identify),
320 DEVMETHOD(device_probe, aesni_probe),
321 DEVMETHOD(device_attach, aesni_attach),
322 DEVMETHOD(device_detach, aesni_detach),
324 DEVMETHOD(cryptodev_newsession, aesni_newsession),
325 DEVMETHOD(cryptodev_freesession, aesni_freesession),
326 DEVMETHOD(cryptodev_process, aesni_process),
331 static driver_t aesni_driver = {
334 sizeof(struct aesni_softc),
336 static devclass_t aesni_devclass;
338 DRIVER_MODULE(aesni, nexus, aesni_driver, aesni_devclass, 0, 0);
339 MODULE_VERSION(aesni, 1);
340 MODULE_DEPEND(aesni, crypto, 1, 1, 1);