2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2017 Chelsio Communications, Inc.
5 * Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org>
7 * Largely borrowed from ccr(4), Written by: John Baldwin <jhb@FreeBSD.org>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
39 #include <sys/kernel.h>
40 #include <sys/malloc.h>
41 #include <sys/mutex.h>
42 #include <sys/module.h>
43 #include <sys/random.h>
44 #include <sys/sglist.h>
45 #include <sys/sysctl.h>
51 #include <dev/pci/pcivar.h>
53 #include <dev/random/randomdev.h>
55 #include <opencrypto/cryptodev.h>
56 #include <opencrypto/xform.h>
58 #include "cryptodev_if.h"
61 #include "ccp_hardware.h"
63 MALLOC_DEFINE(M_CCP, "ccp", "AMD CCP crypto");
66 * Need a global softc available for garbage random_source API, which lacks any
67 * context pointer. It's also handy for debugging.
69 struct ccp_softc *g_ccp_softc;
71 bool g_debug_print = false;
72 SYSCTL_BOOL(_hw_ccp, OID_AUTO, debug, CTLFLAG_RWTUN, &g_debug_print, 0,
73 "Set to enable debugging log messages");
79 { 0x14561022, "AMD CCP-5a" },
80 { 0x14681022, "AMD CCP-5b" },
81 { 0x15df1022, "AMD CCP-5a" },
84 static struct random_source random_ccp = {
85 .rs_ident = "AMD CCP TRNG",
86 .rs_source = RANDOM_PURE_CCP,
87 .rs_read = random_ccp_read,
91 * ccp_populate_sglist() generates a scatter/gather list that covers the entire
92 * crypto operation buffer.
95 ccp_populate_sglist(struct sglist *sg, struct crypto_buffer *cb)
100 switch (cb->cb_type) {
101 case CRYPTO_BUF_MBUF:
102 error = sglist_append_mbuf(sg, cb->cb_mbuf);
104 case CRYPTO_BUF_SINGLE_MBUF:
105 error = sglist_append_single_mbuf(sg, cb->cb_mbuf);
108 error = sglist_append_uio(sg, cb->cb_uio);
110 case CRYPTO_BUF_CONTIG:
111 error = sglist_append(sg, cb->cb_buf, cb->cb_buf_len);
113 case CRYPTO_BUF_VMPAGE:
114 error = sglist_append_vmpages(sg, cb->cb_vm_page,
115 cb->cb_vm_page_offset, cb->cb_vm_page_len);
124 ccp_probe(device_t dev)
129 id = pci_get_devid(dev);
130 for (ip = ccp_ids; ip < &ccp_ids[nitems(ccp_ids)]; ip++) {
131 if (id == ip->devid) {
132 device_set_desc(dev, ip->desc);
140 ccp_initialize_queues(struct ccp_softc *sc)
142 struct ccp_queue *qp;
145 for (i = 0; i < nitems(sc->queues); i++) {
150 mtx_init(&qp->cq_lock, "ccp queue", NULL, MTX_DEF);
151 /* XXX - arbitrarily chosen sizes */
152 qp->cq_sg_crp = sglist_alloc(32, M_WAITOK);
153 /* Two more SGEs than sg_crp to accommodate ipad. */
154 qp->cq_sg_ulptx = sglist_alloc(34, M_WAITOK);
155 qp->cq_sg_dst = sglist_alloc(2, M_WAITOK);
160 ccp_free_queues(struct ccp_softc *sc)
162 struct ccp_queue *qp;
165 for (i = 0; i < nitems(sc->queues); i++) {
168 mtx_destroy(&qp->cq_lock);
169 sglist_free(qp->cq_sg_crp);
170 sglist_free(qp->cq_sg_ulptx);
171 sglist_free(qp->cq_sg_dst);
176 ccp_attach(device_t dev)
178 struct ccp_softc *sc;
181 sc = device_get_softc(dev);
184 sc->cid = crypto_get_driverid(dev, sizeof(struct ccp_session),
185 CRYPTOCAP_F_HARDWARE);
187 device_printf(dev, "could not get crypto driver id\n");
191 error = ccp_hw_attach(dev);
195 mtx_init(&sc->lock, "ccp", NULL, MTX_DEF);
197 ccp_initialize_queues(sc);
199 if (g_ccp_softc == NULL) {
201 if ((sc->hw_features & VERSION_CAP_TRNG) != 0)
202 random_source_register(&random_ccp);
209 ccp_detach(device_t dev)
211 struct ccp_softc *sc;
213 sc = device_get_softc(dev);
216 sc->detaching = true;
217 mtx_unlock(&sc->lock);
219 crypto_unregister_all(sc->cid);
220 if (g_ccp_softc == sc && (sc->hw_features & VERSION_CAP_TRNG) != 0)
221 random_source_deregister(&random_ccp);
226 if (g_ccp_softc == sc)
229 mtx_destroy(&sc->lock);
234 ccp_init_hmac_digest(struct ccp_session *s, const char *key, int klen)
236 union authctx auth_ctx;
237 const struct auth_hash *axf;
241 * If the key is larger than the block size, use the digest of
242 * the key as the key instead.
244 axf = s->hmac.auth_hash;
245 if (klen > axf->blocksize) {
246 axf->Init(&auth_ctx);
247 axf->Update(&auth_ctx, key, klen);
248 axf->Final(s->hmac.ipad, &auth_ctx);
249 explicit_bzero(&auth_ctx, sizeof(auth_ctx));
250 klen = axf->hashsize;
252 memcpy(s->hmac.ipad, key, klen);
254 memset(s->hmac.ipad + klen, 0, axf->blocksize - klen);
255 memcpy(s->hmac.opad, s->hmac.ipad, axf->blocksize);
257 for (i = 0; i < axf->blocksize; i++) {
258 s->hmac.ipad[i] ^= HMAC_IPAD_VAL;
259 s->hmac.opad[i] ^= HMAC_OPAD_VAL;
264 ccp_aes_check_keylen(int alg, int klen)
270 if (alg == CRYPTO_AES_XTS)
276 if (alg != CRYPTO_AES_XTS)
286 ccp_aes_setkey(struct ccp_session *s, int alg, const void *key, int klen)
290 if (alg == CRYPTO_AES_XTS)
291 kbits = (klen / 2) * 8;
297 s->blkcipher.cipher_type = CCP_AES_TYPE_128;
300 s->blkcipher.cipher_type = CCP_AES_TYPE_192;
303 s->blkcipher.cipher_type = CCP_AES_TYPE_256;
306 panic("should not get here");
309 s->blkcipher.key_len = klen;
310 memcpy(s->blkcipher.enckey, key, s->blkcipher.key_len);
314 ccp_auth_supported(struct ccp_softc *sc,
315 const struct crypto_session_params *csp)
318 if ((sc->hw_features & VERSION_CAP_SHA) == 0)
320 switch (csp->csp_auth_alg) {
321 case CRYPTO_SHA1_HMAC:
322 case CRYPTO_SHA2_256_HMAC:
323 case CRYPTO_SHA2_384_HMAC:
324 case CRYPTO_SHA2_512_HMAC:
325 if (csp->csp_auth_key == NULL)
335 ccp_cipher_supported(struct ccp_softc *sc,
336 const struct crypto_session_params *csp)
339 if ((sc->hw_features & VERSION_CAP_AES) == 0)
341 switch (csp->csp_cipher_alg) {
343 if (csp->csp_ivlen != AES_BLOCK_LEN)
347 if (csp->csp_ivlen != AES_BLOCK_LEN)
351 if (csp->csp_ivlen != AES_XTS_IV_LEN)
357 return (ccp_aes_check_keylen(csp->csp_cipher_alg,
358 csp->csp_cipher_klen));
362 ccp_probesession(device_t dev, const struct crypto_session_params *csp)
364 struct ccp_softc *sc;
366 if (csp->csp_flags != 0)
368 sc = device_get_softc(dev);
369 switch (csp->csp_mode) {
370 case CSP_MODE_DIGEST:
371 if (!ccp_auth_supported(sc, csp))
374 case CSP_MODE_CIPHER:
375 if (!ccp_cipher_supported(sc, csp))
379 switch (csp->csp_cipher_alg) {
380 case CRYPTO_AES_NIST_GCM_16:
381 if ((sc->hw_features & VERSION_CAP_AES) == 0)
389 if (!ccp_auth_supported(sc, csp) ||
390 !ccp_cipher_supported(sc, csp))
397 return (CRYPTODEV_PROBE_HARDWARE);
401 ccp_newsession(device_t dev, crypto_session_t cses,
402 const struct crypto_session_params *csp)
404 struct ccp_softc *sc;
405 struct ccp_session *s;
406 const struct auth_hash *auth_hash;
407 enum ccp_aes_mode cipher_mode;
411 /* XXX reconcile auth_mode with use by ccp_sha */
412 switch (csp->csp_auth_alg) {
413 case CRYPTO_SHA1_HMAC:
414 auth_hash = &auth_hash_hmac_sha1;
417 case CRYPTO_SHA2_256_HMAC:
418 auth_hash = &auth_hash_hmac_sha2_256;
419 auth_mode = SHA2_256;
421 case CRYPTO_SHA2_384_HMAC:
422 auth_hash = &auth_hash_hmac_sha2_384;
423 auth_mode = SHA2_384;
425 case CRYPTO_SHA2_512_HMAC:
426 auth_hash = &auth_hash_hmac_sha2_512;
427 auth_mode = SHA2_512;
435 switch (csp->csp_cipher_alg) {
437 cipher_mode = CCP_AES_MODE_CBC;
440 cipher_mode = CCP_AES_MODE_CTR;
442 case CRYPTO_AES_NIST_GCM_16:
443 cipher_mode = CCP_AES_MODE_GCTR;
446 cipher_mode = CCP_AES_MODE_XTS;
449 cipher_mode = CCP_AES_MODE_ECB;
453 sc = device_get_softc(dev);
456 mtx_unlock(&sc->lock);
460 s = crypto_get_driver_session(cses);
462 /* Just grab the first usable queue for now. */
463 for (q = 0; q < nitems(sc->queues); q++)
464 if ((sc->valid_queues & (1 << q)) != 0)
466 if (q == nitems(sc->queues)) {
467 mtx_unlock(&sc->lock);
472 switch (csp->csp_mode) {
479 case CSP_MODE_DIGEST:
482 case CSP_MODE_CIPHER:
487 if (s->mode == GCM) {
488 if (csp->csp_auth_mlen == 0)
489 s->gmac.hash_len = AES_GMAC_HASH_LEN;
491 s->gmac.hash_len = csp->csp_auth_mlen;
492 } else if (auth_hash != NULL) {
493 s->hmac.auth_hash = auth_hash;
494 s->hmac.auth_mode = auth_mode;
495 if (csp->csp_auth_mlen == 0)
496 s->hmac.hash_len = auth_hash->hashsize;
498 s->hmac.hash_len = csp->csp_auth_mlen;
499 ccp_init_hmac_digest(s, csp->csp_auth_key, csp->csp_auth_klen);
501 if (cipher_mode != CCP_AES_MODE_ECB) {
502 s->blkcipher.cipher_mode = cipher_mode;
503 if (csp->csp_cipher_key != NULL)
504 ccp_aes_setkey(s, csp->csp_cipher_alg,
505 csp->csp_cipher_key, csp->csp_cipher_klen);
509 mtx_unlock(&sc->lock);
515 ccp_freesession(device_t dev, crypto_session_t cses)
517 struct ccp_session *s;
519 s = crypto_get_driver_session(cses);
523 "session %p freed with %d pending requests\n", s,
529 ccp_process(device_t dev, struct cryptop *crp, int hint)
531 const struct crypto_session_params *csp;
532 struct ccp_softc *sc;
533 struct ccp_queue *qp;
534 struct ccp_session *s;
541 csp = crypto_get_params(crp->crp_session);
542 s = crypto_get_driver_session(crp->crp_session);
543 sc = device_get_softc(dev);
545 qp = &sc->queues[s->queue];
546 mtx_unlock(&sc->lock);
547 error = ccp_queue_acquire_reserve(qp, 1 /* placeholder */, M_NOWAIT);
552 error = ccp_populate_sglist(qp->cq_sg_crp, &crp->crp_buf);
556 if (crp->crp_auth_key != NULL) {
557 KASSERT(s->hmac.auth_hash != NULL, ("auth key without HMAC"));
558 ccp_init_hmac_digest(s, crp->crp_auth_key, csp->csp_auth_klen);
560 if (crp->crp_cipher_key != NULL)
561 ccp_aes_setkey(s, csp->csp_cipher_alg, crp->crp_cipher_key,
562 csp->csp_cipher_klen);
566 if (s->pending != 0) {
570 error = ccp_hmac(qp, s, crp);
573 if (s->pending != 0) {
577 error = ccp_blkcipher(qp, s, crp);
580 if (s->pending != 0) {
584 error = ccp_authenc(qp, s, crp);
587 if (s->pending != 0) {
591 error = ccp_gcm(qp, s, crp);
602 * Squash EAGAIN so callers don't uselessly and
603 * expensively retry if the ring was full.
609 ccp_queue_release(qp);
613 DPRINTF(dev, "%s: early error:%d\n", __func__, error);
614 crp->crp_etype = error;
620 static device_method_t ccp_methods[] = {
621 DEVMETHOD(device_probe, ccp_probe),
622 DEVMETHOD(device_attach, ccp_attach),
623 DEVMETHOD(device_detach, ccp_detach),
625 DEVMETHOD(cryptodev_probesession, ccp_probesession),
626 DEVMETHOD(cryptodev_newsession, ccp_newsession),
627 DEVMETHOD(cryptodev_freesession, ccp_freesession),
628 DEVMETHOD(cryptodev_process, ccp_process),
633 static driver_t ccp_driver = {
636 sizeof(struct ccp_softc)
639 DRIVER_MODULE(ccp, pci, ccp_driver, NULL, NULL);
640 MODULE_VERSION(ccp, 1);
641 MODULE_DEPEND(ccp, crypto, 1, 1, 1);
642 MODULE_DEPEND(ccp, random_device, 1, 1, 1);
643 #if 0 /* There are enough known issues that we shouldn't load automatically */
644 MODULE_PNP_INFO("W32:vendor/device", pci, ccp, ccp_ids,
649 ccp_queue_reserve_space(struct ccp_queue *qp, unsigned n, int mflags)
651 struct ccp_softc *sc;
653 mtx_assert(&qp->cq_lock, MA_OWNED);
656 if (n < 1 || n >= (1 << sc->ring_size_order))
660 if (ccp_queue_get_ring_space(qp) >= n)
662 if ((mflags & M_WAITOK) == 0)
664 qp->cq_waiting = true;
665 msleep(&qp->cq_tail, &qp->cq_lock, 0, "ccpqfull", 0);
670 ccp_queue_acquire_reserve(struct ccp_queue *qp, unsigned n, int mflags)
674 mtx_lock(&qp->cq_lock);
675 qp->cq_acq_tail = qp->cq_tail;
676 error = ccp_queue_reserve_space(qp, n, mflags);
678 mtx_unlock(&qp->cq_lock);
683 ccp_queue_release(struct ccp_queue *qp)
686 mtx_assert(&qp->cq_lock, MA_OWNED);
687 if (qp->cq_tail != qp->cq_acq_tail) {
689 ccp_queue_write_tail(qp);
691 mtx_unlock(&qp->cq_lock);
695 ccp_queue_abort(struct ccp_queue *qp)
699 mtx_assert(&qp->cq_lock, MA_OWNED);
701 /* Wipe out any descriptors associated with this aborted txn. */
702 for (i = qp->cq_acq_tail; i != qp->cq_tail;
703 i = (i + 1) % (1 << qp->cq_softc->ring_size_order)) {
704 memset(&qp->desc_ring[i], 0, sizeof(qp->desc_ring[i]));
706 qp->cq_tail = qp->cq_acq_tail;
708 mtx_unlock(&qp->cq_lock);
712 #define _db_show_lock(lo) LOCK_CLASS(lo)->lc_ddb_show(lo)
713 #define db_show_lock(lk) _db_show_lock(&(lk)->lock_object)
715 db_show_ccp_sc(struct ccp_softc *sc)
718 db_printf("ccp softc at %p\n", sc);
719 db_printf(" cid: %d\n", (int)sc->cid);
721 db_printf(" lock: ");
722 db_show_lock(&sc->lock);
724 db_printf(" detaching: %d\n", (int)sc->detaching);
725 db_printf(" ring_size_order: %u\n", sc->ring_size_order);
727 db_printf(" hw_version: %d\n", (int)sc->hw_version);
728 db_printf(" hw_features: %b\n", (int)sc->hw_features,
729 "\20\24ELFC\23TRNG\22Zip_Compress\16Zip_Decompress\13ECC\12RSA"
730 "\11SHA\0103DES\07AES");
732 db_printf(" hw status:\n");
737 db_show_ccp_qp(struct ccp_queue *qp)
740 db_printf(" lock: ");
741 db_show_lock(&qp->cq_lock);
743 db_printf(" cq_qindex: %u\n", qp->cq_qindex);
744 db_printf(" cq_softc: %p\n", qp->cq_softc);
746 db_printf(" head: %u\n", qp->cq_head);
747 db_printf(" tail: %u\n", qp->cq_tail);
748 db_printf(" acq_tail: %u\n", qp->cq_acq_tail);
749 db_printf(" desc_ring: %p\n", qp->desc_ring);
750 db_printf(" completions_ring: %p\n", qp->completions_ring);
751 db_printf(" descriptors (phys): 0x%jx\n",
752 (uintmax_t)qp->desc_ring_bus_addr);
754 db_printf(" hw status:\n");
755 db_ccp_show_queue_hw(qp);
758 DB_SHOW_COMMAND(ccp, db_show_ccp)
760 struct ccp_softc *sc;
761 unsigned unit, qindex;
766 unit = (unsigned)addr;
768 sc = devclass_get_softc(devclass_find("ccp"), unit);
770 db_printf("No such device ccp%u\n", unit);
779 qindex = (unsigned)count;
780 if (qindex >= nitems(sc->queues)) {
781 db_printf("No such queue %u\n", qindex);
784 db_show_ccp_qp(&sc->queues[qindex]);
788 db_printf("usage: show ccp <unit>[,<qindex>]\n");