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
27 * $FreeBSD: src/sys/crypto/aesni/aesni.c,v 1.3 2010/09/23 11:57:25 pjd Exp $
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
34 #include <sys/libkern.h>
36 #include <sys/module.h>
37 #include <sys/malloc.h>
38 #include <sys/spinlock.h>
39 #include <sys/spinlock2.h>
42 #include <dev/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, 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");
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);
108 spin_lock(&sc->lock);
109 TAILQ_FOREACH(ses, &sc->sessions, next) {
111 spin_unlock(&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 spin_unlock(&sc->lock);
122 spin_uninit(&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) {
156 spin_lock(&sc->lock);
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) {
166 * Release the spinlock here, since the following
167 * kmalloc(M_WAITOK) may block. kmalloc(M_NOWAIT)
168 * is not acceptable on this code path.
170 spin_unlock(&sc->lock);
174 * If the allocation size is 2^n, then the memory returned
175 * by kmalloc(9) will be 2^n aligned.
177 for (size = AESNI_ALIGN; size < sizeof(*ses); size <<= 1)
179 ses = kmalloc(size, M_AESNI, M_WAITOK | M_ZERO);
180 if ((uintptr_t)ses & (AESNI_ALIGN - 1)) {
181 panic("aesni: ses %p is not %d aligned",
185 spin_lock(&sc->lock);
188 TAILQ_REMOVE(&sc->sessions, ses, next);
191 TAILQ_INSERT_TAIL(&sc->sessions, ses, next);
192 spin_unlock(&sc->lock);
193 ses->algo = encini->cri_alg;
195 error = aesni_cipher_setup(ses, encini);
197 spin_lock(&sc->lock);
198 aesni_freesession_locked(sc, ses);
199 spin_unlock(&sc->lock);
208 aesni_freesession_locked(struct aesni_softc *sc, struct aesni_session *ses)
213 TAILQ_REMOVE(&sc->sessions, ses, next);
215 bzero(ses, sizeof(*ses));
217 TAILQ_INSERT_HEAD(&sc->sessions, ses, next);
221 aesni_freesession(device_t dev, uint64_t tid)
223 struct aesni_softc *sc;
224 struct aesni_session *ses;
227 sc = device_get_softc(dev);
228 sid = ((uint32_t)tid) & 0xffffffff;
229 spin_lock(&sc->lock);
230 TAILQ_FOREACH_REVERSE(ses, &sc->sessions, aesni_sessions_head, next) {
235 spin_unlock(&sc->lock);
238 aesni_freesession_locked(sc, ses);
239 spin_unlock(&sc->lock);
244 aesni_process(device_t dev, struct cryptop *crp, int hint __unused)
246 struct aesni_softc *sc = device_get_softc(dev);
247 struct aesni_session *ses = NULL;
248 struct cryptodesc *crd, *enccrd;
258 if (crp->crp_callback == NULL || crp->crp_desc == NULL) {
263 for (crd = crp->crp_desc; crd != NULL; crd = crd->crd_next) {
264 switch (crd->crd_alg) {
267 if (enccrd != NULL) {
277 if (enccrd == NULL || (enccrd->crd_len % AES_BLOCK_LEN) != 0) {
282 spin_lock(&sc->lock); /* XXX: was rd lock */
283 TAILQ_FOREACH_REVERSE(ses, &sc->sessions, aesni_sessions_head, next) {
284 if (ses->id == (crp->crp_sid & 0xffffffff))
287 spin_unlock(&sc->lock); /* XXX: was rd lock */
293 error = aesni_cipher_process(ses, enccrd, crp);
298 crp->crp_etype = error;
304 aesni_cipher_alloc(struct cryptodesc *enccrd, struct cryptop *crp,
311 if (crp->crp_flags & CRYPTO_F_IMBUF)
313 else if (crp->crp_flags & CRYPTO_F_IOV) {
314 uio = (struct uio *)crp->crp_buf;
315 if (uio->uio_iovcnt != 1)
318 addr = (u_char *)iov->iov_base + enccrd->crd_skip;
320 addr = (u_char *)crp->crp_buf;
325 addr = kmalloc(enccrd->crd_len, M_AESNI, M_NOWAIT);
328 crypto_copydata(crp->crp_flags, crp->crp_buf, enccrd->crd_skip,
329 enccrd->crd_len, addr);
335 static device_method_t aesni_methods[] = {
336 DEVMETHOD(device_identify, aesni_identify),
337 DEVMETHOD(device_probe, aesni_probe),
338 DEVMETHOD(device_attach, aesni_attach),
339 DEVMETHOD(device_detach, aesni_detach),
341 DEVMETHOD(cryptodev_newsession, aesni_newsession),
342 DEVMETHOD(cryptodev_freesession, aesni_freesession),
343 DEVMETHOD(cryptodev_process, aesni_process),
348 static driver_t aesni_driver = {
351 sizeof(struct aesni_softc),
353 static devclass_t aesni_devclass;
355 DRIVER_MODULE(aesni, nexus, aesni_driver, aesni_devclass, NULL, NULL);
356 MODULE_VERSION(aesni, 1);
357 MODULE_DEPEND(aesni, crypto, 1, 1, 1);