1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2019 Netronome Systems, Inc. */
3 
4 #include <linux/bitfield.h>
5 #include <linux/ipv6.h>
6 #include <linux/skbuff.h>
7 #include <linux/string.h>
8 #include <net/inet6_hashtables.h>
9 #include <net/tls.h>
10 
11 #include "../ccm.h"
12 #include "../nfp_net.h"
13 #include "crypto.h"
14 #include "fw.h"
15 
16 #define NFP_NET_TLS_CCM_MBOX_OPS_MASK		\
17 	(BIT(NFP_CCM_TYPE_CRYPTO_RESET) |	\
18 	 BIT(NFP_CCM_TYPE_CRYPTO_ADD) |		\
19 	 BIT(NFP_CCM_TYPE_CRYPTO_DEL) |		\
20 	 BIT(NFP_CCM_TYPE_CRYPTO_UPDATE))
21 
22 #define NFP_NET_TLS_OPCODE_MASK_RX			\
23 	BIT(NFP_NET_CRYPTO_OP_TLS_1_2_AES_GCM_128_DEC)
24 
25 #define NFP_NET_TLS_OPCODE_MASK_TX			\
26 	BIT(NFP_NET_CRYPTO_OP_TLS_1_2_AES_GCM_128_ENC)
27 
28 #define NFP_NET_TLS_OPCODE_MASK						\
29 	(NFP_NET_TLS_OPCODE_MASK_RX | NFP_NET_TLS_OPCODE_MASK_TX)
30 
31 static void nfp_net_crypto_set_op(struct nfp_net *nn, u8 opcode, bool on)
32 {
33 	u32 off, val;
34 
35 	off = nn->tlv_caps.crypto_enable_off + round_down(opcode / 8, 4);
36 
37 	val = nn_readl(nn, off);
38 	if (on)
39 		val |= BIT(opcode & 31);
40 	else
41 		val &= ~BIT(opcode & 31);
42 	nn_writel(nn, off, val);
43 }
44 
45 static bool
46 __nfp_net_tls_conn_cnt_changed(struct nfp_net *nn, int add,
47 			       enum tls_offload_ctx_dir direction)
48 {
49 	u8 opcode;
50 	int cnt;
51 
52 	if (direction == TLS_OFFLOAD_CTX_DIR_TX) {
53 		opcode = NFP_NET_CRYPTO_OP_TLS_1_2_AES_GCM_128_ENC;
54 		nn->ktls_tx_conn_cnt += add;
55 		cnt = nn->ktls_tx_conn_cnt;
56 		nn->dp.ktls_tx = !!nn->ktls_tx_conn_cnt;
57 	} else {
58 		opcode = NFP_NET_CRYPTO_OP_TLS_1_2_AES_GCM_128_DEC;
59 		nn->ktls_rx_conn_cnt += add;
60 		cnt = nn->ktls_rx_conn_cnt;
61 	}
62 
63 	/* Care only about 0 -> 1 and 1 -> 0 transitions */
64 	if (cnt > 1)
65 		return false;
66 
67 	nfp_net_crypto_set_op(nn, opcode, cnt);
68 	return true;
69 }
70 
71 static int
72 nfp_net_tls_conn_cnt_changed(struct nfp_net *nn, int add,
73 			     enum tls_offload_ctx_dir direction)
74 {
75 	int ret = 0;
76 
77 	/* Use the BAR lock to protect the connection counts */
78 	nn_ctrl_bar_lock(nn);
79 	if (__nfp_net_tls_conn_cnt_changed(nn, add, direction)) {
80 		ret = __nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_CRYPTO);
81 		/* Undo the cnt adjustment if failed */
82 		if (ret)
83 			__nfp_net_tls_conn_cnt_changed(nn, -add, direction);
84 	}
85 	nn_ctrl_bar_unlock(nn);
86 
87 	return ret;
88 }
89 
90 static int
91 nfp_net_tls_conn_add(struct nfp_net *nn, enum tls_offload_ctx_dir direction)
92 {
93 	return nfp_net_tls_conn_cnt_changed(nn, 1, direction);
94 }
95 
96 static int
97 nfp_net_tls_conn_remove(struct nfp_net *nn, enum tls_offload_ctx_dir direction)
98 {
99 	return nfp_net_tls_conn_cnt_changed(nn, -1, direction);
100 }
101 
102 static struct sk_buff *
103 nfp_net_tls_alloc_simple(struct nfp_net *nn, size_t req_sz, gfp_t flags)
104 {
105 	return nfp_ccm_mbox_msg_alloc(nn, req_sz,
106 				      sizeof(struct nfp_crypto_reply_simple),
107 				      flags);
108 }
109 
110 static int
111 nfp_net_tls_communicate_simple(struct nfp_net *nn, struct sk_buff *skb,
112 			       const char *name, enum nfp_ccm_type type)
113 {
114 	struct nfp_crypto_reply_simple *reply;
115 	int err;
116 
117 	err = __nfp_ccm_mbox_communicate(nn, skb, type,
118 					 sizeof(*reply), sizeof(*reply),
119 					 type == NFP_CCM_TYPE_CRYPTO_DEL);
120 	if (err) {
121 		nn_dp_warn(&nn->dp, "failed to %s TLS: %d\n", name, err);
122 		return err;
123 	}
124 
125 	reply = (void *)skb->data;
126 	err = -be32_to_cpu(reply->error);
127 	if (err)
128 		nn_dp_warn(&nn->dp, "failed to %s TLS, fw replied: %d\n",
129 			   name, err);
130 	dev_consume_skb_any(skb);
131 
132 	return err;
133 }
134 
135 static void nfp_net_tls_del_fw(struct nfp_net *nn, __be32 *fw_handle)
136 {
137 	struct nfp_crypto_req_del *req;
138 	struct sk_buff *skb;
139 
140 	skb = nfp_net_tls_alloc_simple(nn, sizeof(*req), GFP_KERNEL);
141 	if (!skb)
142 		return;
143 
144 	req = (void *)skb->data;
145 	req->ep_id = 0;
146 	memcpy(req->handle, fw_handle, sizeof(req->handle));
147 
148 	nfp_net_tls_communicate_simple(nn, skb, "delete",
149 				       NFP_CCM_TYPE_CRYPTO_DEL);
150 }
151 
152 static void
153 nfp_net_tls_set_ipver_vlan(struct nfp_crypto_req_add_front *front, u8 ipver)
154 {
155 	front->ipver_vlan = cpu_to_be16(FIELD_PREP(NFP_NET_TLS_IPVER, ipver) |
156 					FIELD_PREP(NFP_NET_TLS_VLAN,
157 						   NFP_NET_TLS_VLAN_UNUSED));
158 }
159 
160 static void
161 nfp_net_tls_assign_conn_id(struct nfp_net *nn,
162 			   struct nfp_crypto_req_add_front *front)
163 {
164 	u32 len;
165 	u64 id;
166 
167 	id = atomic64_inc_return(&nn->ktls_conn_id_gen);
168 	len = front->key_len - NFP_NET_TLS_NON_ADDR_KEY_LEN;
169 
170 	memcpy(front->l3_addrs, &id, sizeof(id));
171 	memset(front->l3_addrs + sizeof(id), 0, len - sizeof(id));
172 }
173 
174 static struct nfp_crypto_req_add_back *
175 nfp_net_tls_set_ipv4(struct nfp_net *nn, struct nfp_crypto_req_add_v4 *req,
176 		     struct sock *sk, int direction)
177 {
178 	struct inet_sock *inet = inet_sk(sk);
179 
180 	req->front.key_len += sizeof(__be32) * 2;
181 
182 	if (direction == TLS_OFFLOAD_CTX_DIR_TX) {
183 		nfp_net_tls_assign_conn_id(nn, &req->front);
184 	} else {
185 		req->src_ip = inet->inet_daddr;
186 		req->dst_ip = inet->inet_saddr;
187 	}
188 
189 	return &req->back;
190 }
191 
192 static struct nfp_crypto_req_add_back *
193 nfp_net_tls_set_ipv6(struct nfp_net *nn, struct nfp_crypto_req_add_v6 *req,
194 		     struct sock *sk, int direction)
195 {
196 #if IS_ENABLED(CONFIG_IPV6)
197 	struct ipv6_pinfo *np = inet6_sk(sk);
198 
199 	req->front.key_len += sizeof(struct in6_addr) * 2;
200 
201 	if (direction == TLS_OFFLOAD_CTX_DIR_TX) {
202 		nfp_net_tls_assign_conn_id(nn, &req->front);
203 	} else {
204 		memcpy(req->src_ip, &sk->sk_v6_daddr, sizeof(req->src_ip));
205 		memcpy(req->dst_ip, &np->saddr, sizeof(req->dst_ip));
206 	}
207 
208 #endif
209 	return &req->back;
210 }
211 
212 static void
213 nfp_net_tls_set_l4(struct nfp_crypto_req_add_front *front,
214 		   struct nfp_crypto_req_add_back *back, struct sock *sk,
215 		   int direction)
216 {
217 	struct inet_sock *inet = inet_sk(sk);
218 
219 	front->l4_proto = IPPROTO_TCP;
220 
221 	if (direction == TLS_OFFLOAD_CTX_DIR_TX) {
222 		back->src_port = 0;
223 		back->dst_port = 0;
224 	} else {
225 		back->src_port = inet->inet_dport;
226 		back->dst_port = inet->inet_sport;
227 	}
228 }
229 
230 static u8 nfp_tls_1_2_dir_to_opcode(enum tls_offload_ctx_dir direction)
231 {
232 	switch (direction) {
233 	case TLS_OFFLOAD_CTX_DIR_TX:
234 		return NFP_NET_CRYPTO_OP_TLS_1_2_AES_GCM_128_ENC;
235 	case TLS_OFFLOAD_CTX_DIR_RX:
236 		return NFP_NET_CRYPTO_OP_TLS_1_2_AES_GCM_128_DEC;
237 	default:
238 		WARN_ON_ONCE(1);
239 		return 0;
240 	}
241 }
242 
243 static bool
244 nfp_net_cipher_supported(struct nfp_net *nn, u16 cipher_type,
245 			 enum tls_offload_ctx_dir direction)
246 {
247 	u8 bit;
248 
249 	switch (cipher_type) {
250 	case TLS_CIPHER_AES_GCM_128:
251 		if (direction == TLS_OFFLOAD_CTX_DIR_TX)
252 			bit = NFP_NET_CRYPTO_OP_TLS_1_2_AES_GCM_128_ENC;
253 		else
254 			bit = NFP_NET_CRYPTO_OP_TLS_1_2_AES_GCM_128_DEC;
255 		break;
256 	default:
257 		return false;
258 	}
259 
260 	return nn->tlv_caps.crypto_ops & BIT(bit);
261 }
262 
263 static int
264 nfp_net_tls_add(struct net_device *netdev, struct sock *sk,
265 		enum tls_offload_ctx_dir direction,
266 		struct tls_crypto_info *crypto_info,
267 		u32 start_offload_tcp_sn)
268 {
269 	struct tls12_crypto_info_aes_gcm_128 *tls_ci;
270 	struct nfp_net *nn = netdev_priv(netdev);
271 	struct nfp_crypto_req_add_front *front;
272 	struct nfp_net_tls_offload_ctx *ntls;
273 	struct nfp_crypto_req_add_back *back;
274 	struct nfp_crypto_reply_add *reply;
275 	struct sk_buff *skb;
276 	size_t req_sz;
277 	void *req;
278 	bool ipv6;
279 	int err;
280 
281 	BUILD_BUG_ON(sizeof(struct nfp_net_tls_offload_ctx) >
282 		     TLS_DRIVER_STATE_SIZE_TX);
283 	BUILD_BUG_ON(offsetof(struct nfp_net_tls_offload_ctx, rx_end) >
284 		     TLS_DRIVER_STATE_SIZE_RX);
285 
286 	if (!nfp_net_cipher_supported(nn, crypto_info->cipher_type, direction))
287 		return -EOPNOTSUPP;
288 
289 	switch (sk->sk_family) {
290 #if IS_ENABLED(CONFIG_IPV6)
291 	case AF_INET6:
292 		if (ipv6_only_sock(sk) ||
293 		    ipv6_addr_type(&sk->sk_v6_daddr) != IPV6_ADDR_MAPPED) {
294 			req_sz = sizeof(struct nfp_crypto_req_add_v6);
295 			ipv6 = true;
296 			break;
297 		}
298 		fallthrough;
299 #endif
300 	case AF_INET:
301 		req_sz = sizeof(struct nfp_crypto_req_add_v4);
302 		ipv6 = false;
303 		break;
304 	default:
305 		return -EOPNOTSUPP;
306 	}
307 
308 	err = nfp_net_tls_conn_add(nn, direction);
309 	if (err)
310 		return err;
311 
312 	skb = nfp_ccm_mbox_msg_alloc(nn, req_sz, sizeof(*reply), GFP_KERNEL);
313 	if (!skb) {
314 		err = -ENOMEM;
315 		goto err_conn_remove;
316 	}
317 
318 	front = (void *)skb->data;
319 	front->ep_id = 0;
320 	front->key_len = NFP_NET_TLS_NON_ADDR_KEY_LEN;
321 	front->opcode = nfp_tls_1_2_dir_to_opcode(direction);
322 	memset(front->resv, 0, sizeof(front->resv));
323 
324 	nfp_net_tls_set_ipver_vlan(front, ipv6 ? 6 : 4);
325 
326 	req = (void *)skb->data;
327 	if (ipv6)
328 		back = nfp_net_tls_set_ipv6(nn, req, sk, direction);
329 	else
330 		back = nfp_net_tls_set_ipv4(nn, req, sk, direction);
331 
332 	nfp_net_tls_set_l4(front, back, sk, direction);
333 
334 	back->counter = 0;
335 	back->tcp_seq = cpu_to_be32(start_offload_tcp_sn);
336 
337 	tls_ci = (struct tls12_crypto_info_aes_gcm_128 *)crypto_info;
338 	memcpy(back->key, tls_ci->key, TLS_CIPHER_AES_GCM_128_KEY_SIZE);
339 	memset(&back->key[TLS_CIPHER_AES_GCM_128_KEY_SIZE / 4], 0,
340 	       sizeof(back->key) - TLS_CIPHER_AES_GCM_128_KEY_SIZE);
341 	memcpy(back->iv, tls_ci->iv, TLS_CIPHER_AES_GCM_128_IV_SIZE);
342 	memcpy(&back->salt, tls_ci->salt, TLS_CIPHER_AES_GCM_128_SALT_SIZE);
343 	memcpy(back->rec_no, tls_ci->rec_seq, sizeof(tls_ci->rec_seq));
344 
345 	/* Get an extra ref on the skb so we can wipe the key after */
346 	skb_get(skb);
347 
348 	err = nfp_ccm_mbox_communicate(nn, skb, NFP_CCM_TYPE_CRYPTO_ADD,
349 				       sizeof(*reply), sizeof(*reply));
350 	reply = (void *)skb->data;
351 
352 	/* We depend on CCM MBOX code not reallocating skb we sent
353 	 * so we can clear the key material out of the memory.
354 	 */
355 	if (!WARN_ON_ONCE((u8 *)back < skb->head ||
356 			  (u8 *)back > skb_end_pointer(skb)) &&
357 	    !WARN_ON_ONCE((u8 *)&reply[1] > (u8 *)back))
358 		memzero_explicit(back, sizeof(*back));
359 	dev_consume_skb_any(skb); /* the extra ref from skb_get() above */
360 
361 	if (err) {
362 		nn_dp_warn(&nn->dp, "failed to add TLS: %d (%d)\n",
363 			   err, direction == TLS_OFFLOAD_CTX_DIR_TX);
364 		/* communicate frees skb on error */
365 		goto err_conn_remove;
366 	}
367 
368 	err = -be32_to_cpu(reply->error);
369 	if (err) {
370 		if (err == -ENOSPC) {
371 			if (!atomic_fetch_inc(&nn->ktls_no_space))
372 				nn_info(nn, "HW TLS table full\n");
373 		} else {
374 			nn_dp_warn(&nn->dp,
375 				   "failed to add TLS, FW replied: %d\n", err);
376 		}
377 		goto err_free_skb;
378 	}
379 
380 	if (!reply->handle[0] && !reply->handle[1]) {
381 		nn_dp_warn(&nn->dp, "FW returned NULL handle\n");
382 		err = -EINVAL;
383 		goto err_fw_remove;
384 	}
385 
386 	ntls = tls_driver_ctx(sk, direction);
387 	memcpy(ntls->fw_handle, reply->handle, sizeof(ntls->fw_handle));
388 	if (direction == TLS_OFFLOAD_CTX_DIR_TX)
389 		ntls->next_seq = start_offload_tcp_sn;
390 	dev_consume_skb_any(skb);
391 
392 	if (direction == TLS_OFFLOAD_CTX_DIR_TX)
393 		return 0;
394 
395 	if (!nn->tlv_caps.tls_resync_ss)
396 		tls_offload_rx_resync_set_type(sk, TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT);
397 
398 	return 0;
399 
400 err_fw_remove:
401 	nfp_net_tls_del_fw(nn, reply->handle);
402 err_free_skb:
403 	dev_consume_skb_any(skb);
404 err_conn_remove:
405 	nfp_net_tls_conn_remove(nn, direction);
406 	return err;
407 }
408 
409 static void
410 nfp_net_tls_del(struct net_device *netdev, struct tls_context *tls_ctx,
411 		enum tls_offload_ctx_dir direction)
412 {
413 	struct nfp_net *nn = netdev_priv(netdev);
414 	struct nfp_net_tls_offload_ctx *ntls;
415 
416 	nfp_net_tls_conn_remove(nn, direction);
417 
418 	ntls = __tls_driver_ctx(tls_ctx, direction);
419 	nfp_net_tls_del_fw(nn, ntls->fw_handle);
420 }
421 
422 static int
423 nfp_net_tls_resync(struct net_device *netdev, struct sock *sk, u32 seq,
424 		   u8 *rcd_sn, enum tls_offload_ctx_dir direction)
425 {
426 	struct nfp_net *nn = netdev_priv(netdev);
427 	struct nfp_net_tls_offload_ctx *ntls;
428 	struct nfp_crypto_req_update *req;
429 	enum nfp_ccm_type type;
430 	struct sk_buff *skb;
431 	gfp_t flags;
432 	int err;
433 
434 	flags = direction == TLS_OFFLOAD_CTX_DIR_TX ? GFP_KERNEL : GFP_ATOMIC;
435 	skb = nfp_net_tls_alloc_simple(nn, sizeof(*req), flags);
436 	if (!skb)
437 		return -ENOMEM;
438 
439 	ntls = tls_driver_ctx(sk, direction);
440 	req = (void *)skb->data;
441 	req->ep_id = 0;
442 	req->opcode = nfp_tls_1_2_dir_to_opcode(direction);
443 	memset(req->resv, 0, sizeof(req->resv));
444 	memcpy(req->handle, ntls->fw_handle, sizeof(ntls->fw_handle));
445 	req->tcp_seq = cpu_to_be32(seq);
446 	memcpy(req->rec_no, rcd_sn, sizeof(req->rec_no));
447 
448 	type = NFP_CCM_TYPE_CRYPTO_UPDATE;
449 	if (direction == TLS_OFFLOAD_CTX_DIR_TX) {
450 		err = nfp_net_tls_communicate_simple(nn, skb, "sync", type);
451 		if (err)
452 			return err;
453 		ntls->next_seq = seq;
454 	} else {
455 		if (nn->tlv_caps.tls_resync_ss)
456 			type = NFP_CCM_TYPE_CRYPTO_RESYNC;
457 		nfp_ccm_mbox_post(nn, skb, type,
458 				  sizeof(struct nfp_crypto_reply_simple));
459 		atomic_inc(&nn->ktls_rx_resync_sent);
460 	}
461 
462 	return 0;
463 }
464 
465 static const struct tlsdev_ops nfp_net_tls_ops = {
466 	.tls_dev_add = nfp_net_tls_add,
467 	.tls_dev_del = nfp_net_tls_del,
468 	.tls_dev_resync = nfp_net_tls_resync,
469 };
470 
471 int nfp_net_tls_rx_resync_req(struct net_device *netdev,
472 			      struct nfp_net_tls_resync_req *req,
473 			      void *pkt, unsigned int pkt_len)
474 {
475 	struct nfp_net *nn = netdev_priv(netdev);
476 	struct nfp_net_tls_offload_ctx *ntls;
477 	struct net *net = dev_net(netdev);
478 	struct ipv6hdr *ipv6h;
479 	struct tcphdr *th;
480 	struct iphdr *iph;
481 	struct sock *sk;
482 	__be32 tcp_seq;
483 	int err;
484 
485 	iph = pkt + req->l3_offset;
486 	ipv6h = pkt + req->l3_offset;
487 	th = pkt + req->l4_offset;
488 
489 	if ((u8 *)&th[1] > (u8 *)pkt + pkt_len) {
490 		netdev_warn_once(netdev, "invalid TLS RX resync request (l3_off: %hhu l4_off: %hhu pkt_len: %u)\n",
491 				 req->l3_offset, req->l4_offset, pkt_len);
492 		err = -EINVAL;
493 		goto err_cnt_ign;
494 	}
495 
496 	switch (ipv6h->version) {
497 	case 4:
498 		sk = inet_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
499 					     iph->saddr, th->source, iph->daddr,
500 					     th->dest, netdev->ifindex);
501 		break;
502 #if IS_ENABLED(CONFIG_IPV6)
503 	case 6:
504 		sk = __inet6_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
505 						&ipv6h->saddr, th->source,
506 						&ipv6h->daddr, ntohs(th->dest),
507 						netdev->ifindex, 0);
508 		break;
509 #endif
510 	default:
511 		netdev_warn_once(netdev, "invalid TLS RX resync request (l3_off: %hhu l4_off: %hhu ipver: %u)\n",
512 				 req->l3_offset, req->l4_offset, iph->version);
513 		err = -EINVAL;
514 		goto err_cnt_ign;
515 	}
516 
517 	err = 0;
518 	if (!sk)
519 		goto err_cnt_ign;
520 	if (!tls_is_sk_rx_device_offloaded(sk) ||
521 	    sk->sk_shutdown & RCV_SHUTDOWN)
522 		goto err_put_sock;
523 
524 	ntls = tls_driver_ctx(sk, TLS_OFFLOAD_CTX_DIR_RX);
525 	/* some FW versions can't report the handle and report 0s */
526 	if (memchr_inv(&req->fw_handle, 0, sizeof(req->fw_handle)) &&
527 	    memcmp(&req->fw_handle, &ntls->fw_handle, sizeof(ntls->fw_handle)))
528 		goto err_put_sock;
529 
530 	/* copy to ensure alignment */
531 	memcpy(&tcp_seq, &req->tcp_seq, sizeof(tcp_seq));
532 	tls_offload_rx_resync_request(sk, tcp_seq);
533 	atomic_inc(&nn->ktls_rx_resync_req);
534 
535 	sock_gen_put(sk);
536 	return 0;
537 
538 err_put_sock:
539 	sock_gen_put(sk);
540 err_cnt_ign:
541 	atomic_inc(&nn->ktls_rx_resync_ign);
542 	return err;
543 }
544 
545 static int nfp_net_tls_reset(struct nfp_net *nn)
546 {
547 	struct nfp_crypto_req_reset *req;
548 	struct sk_buff *skb;
549 
550 	skb = nfp_net_tls_alloc_simple(nn, sizeof(*req), GFP_KERNEL);
551 	if (!skb)
552 		return -ENOMEM;
553 
554 	req = (void *)skb->data;
555 	req->ep_id = 0;
556 
557 	return nfp_net_tls_communicate_simple(nn, skb, "reset",
558 					      NFP_CCM_TYPE_CRYPTO_RESET);
559 }
560 
561 int nfp_net_tls_init(struct nfp_net *nn)
562 {
563 	struct net_device *netdev = nn->dp.netdev;
564 	int err;
565 
566 	if (!(nn->tlv_caps.crypto_ops & NFP_NET_TLS_OPCODE_MASK))
567 		return 0;
568 
569 	if ((nn->tlv_caps.mbox_cmsg_types & NFP_NET_TLS_CCM_MBOX_OPS_MASK) !=
570 	    NFP_NET_TLS_CCM_MBOX_OPS_MASK)
571 		return 0;
572 
573 	if (!nfp_ccm_mbox_fits(nn, sizeof(struct nfp_crypto_req_add_v6))) {
574 		nn_warn(nn, "disabling TLS offload - mbox too small: %d\n",
575 			nn->tlv_caps.mbox_len);
576 		return 0;
577 	}
578 
579 	err = nfp_net_tls_reset(nn);
580 	if (err)
581 		return err;
582 
583 	nn_ctrl_bar_lock(nn);
584 	nn_writel(nn, nn->tlv_caps.crypto_enable_off, 0);
585 	err = __nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_CRYPTO);
586 	nn_ctrl_bar_unlock(nn);
587 	if (err)
588 		return err;
589 
590 	if (nn->tlv_caps.crypto_ops & NFP_NET_TLS_OPCODE_MASK_RX) {
591 		netdev->hw_features |= NETIF_F_HW_TLS_RX;
592 		netdev->features |= NETIF_F_HW_TLS_RX;
593 	}
594 	if (nn->tlv_caps.crypto_ops & NFP_NET_TLS_OPCODE_MASK_TX) {
595 		netdev->hw_features |= NETIF_F_HW_TLS_TX;
596 		netdev->features |= NETIF_F_HW_TLS_TX;
597 	}
598 
599 	netdev->tlsdev_ops = &nfp_net_tls_ops;
600 
601 	return 0;
602 }
603