1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2018 Oracle and/or its affiliates. All rights reserved. */
3
4 #include "ixgbevf.h"
5 #include <net/xfrm.h>
6 #include <crypto/aead.h>
7
8 #define IXGBE_IPSEC_KEY_BITS 160
9 static const char aes_gcm_name[] = "rfc4106(gcm(aes))";
10
11 /**
12 * ixgbevf_ipsec_set_pf_sa - ask the PF to set up an SA
13 * @adapter: board private structure
14 * @xs: xfrm info to be sent to the PF
15 *
16 * Returns: positive offload handle from the PF, or negative error code
17 **/
ixgbevf_ipsec_set_pf_sa(struct ixgbevf_adapter * adapter,struct xfrm_state * xs)18 static int ixgbevf_ipsec_set_pf_sa(struct ixgbevf_adapter *adapter,
19 struct xfrm_state *xs)
20 {
21 u32 msgbuf[IXGBE_VFMAILBOX_SIZE] = { 0 };
22 struct ixgbe_hw *hw = &adapter->hw;
23 struct sa_mbx_msg *sam;
24 int ret;
25
26 /* send the important bits to the PF */
27 sam = (struct sa_mbx_msg *)(&msgbuf[1]);
28 sam->dir = xs->xso.dir;
29 sam->spi = xs->id.spi;
30 sam->proto = xs->id.proto;
31 sam->family = xs->props.family;
32
33 if (xs->props.family == AF_INET6)
34 memcpy(sam->addr, &xs->id.daddr.a6, sizeof(xs->id.daddr.a6));
35 else
36 memcpy(sam->addr, &xs->id.daddr.a4, sizeof(xs->id.daddr.a4));
37 memcpy(sam->key, xs->aead->alg_key, sizeof(sam->key));
38
39 msgbuf[0] = IXGBE_VF_IPSEC_ADD;
40
41 spin_lock_bh(&adapter->mbx_lock);
42
43 ret = ixgbevf_write_mbx(hw, msgbuf, IXGBE_VFMAILBOX_SIZE);
44 if (ret)
45 goto out;
46
47 ret = ixgbevf_poll_mbx(hw, msgbuf, 2);
48 if (ret)
49 goto out;
50
51 ret = (int)msgbuf[1];
52 if (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE && ret >= 0)
53 ret = -1;
54
55 out:
56 spin_unlock_bh(&adapter->mbx_lock);
57
58 return ret;
59 }
60
61 /**
62 * ixgbevf_ipsec_del_pf_sa - ask the PF to delete an SA
63 * @adapter: board private structure
64 * @pfsa: sa index returned from PF when created, -1 for all
65 *
66 * Returns: 0 on success, or negative error code
67 **/
ixgbevf_ipsec_del_pf_sa(struct ixgbevf_adapter * adapter,int pfsa)68 static int ixgbevf_ipsec_del_pf_sa(struct ixgbevf_adapter *adapter, int pfsa)
69 {
70 struct ixgbe_hw *hw = &adapter->hw;
71 u32 msgbuf[2];
72 int err;
73
74 memset(msgbuf, 0, sizeof(msgbuf));
75 msgbuf[0] = IXGBE_VF_IPSEC_DEL;
76 msgbuf[1] = (u32)pfsa;
77
78 spin_lock_bh(&adapter->mbx_lock);
79
80 err = ixgbevf_write_mbx(hw, msgbuf, 2);
81 if (err)
82 goto out;
83
84 err = ixgbevf_poll_mbx(hw, msgbuf, 2);
85 if (err)
86 goto out;
87
88 out:
89 spin_unlock_bh(&adapter->mbx_lock);
90 return err;
91 }
92
93 /**
94 * ixgbevf_ipsec_restore - restore the IPsec HW settings after a reset
95 * @adapter: board private structure
96 *
97 * Reload the HW tables from the SW tables after they've been bashed
98 * by a chip reset. While we're here, make sure any stale VF data is
99 * removed, since we go through reset when num_vfs changes.
100 **/
ixgbevf_ipsec_restore(struct ixgbevf_adapter * adapter)101 void ixgbevf_ipsec_restore(struct ixgbevf_adapter *adapter)
102 {
103 struct ixgbevf_ipsec *ipsec = adapter->ipsec;
104 struct net_device *netdev = adapter->netdev;
105 int i;
106
107 if (!(adapter->netdev->features & NETIF_F_HW_ESP))
108 return;
109
110 /* reload the Rx and Tx keys */
111 for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) {
112 struct rx_sa *r = &ipsec->rx_tbl[i];
113 struct tx_sa *t = &ipsec->tx_tbl[i];
114 int ret;
115
116 if (r->used) {
117 ret = ixgbevf_ipsec_set_pf_sa(adapter, r->xs);
118 if (ret < 0)
119 netdev_err(netdev, "reload rx_tbl[%d] failed = %d\n",
120 i, ret);
121 }
122
123 if (t->used) {
124 ret = ixgbevf_ipsec_set_pf_sa(adapter, t->xs);
125 if (ret < 0)
126 netdev_err(netdev, "reload tx_tbl[%d] failed = %d\n",
127 i, ret);
128 }
129 }
130 }
131
132 /**
133 * ixgbevf_ipsec_find_empty_idx - find the first unused security parameter index
134 * @ipsec: pointer to IPsec struct
135 * @rxtable: true if we need to look in the Rx table
136 *
137 * Returns the first unused index in either the Rx or Tx SA table
138 **/
139 static
ixgbevf_ipsec_find_empty_idx(struct ixgbevf_ipsec * ipsec,bool rxtable)140 int ixgbevf_ipsec_find_empty_idx(struct ixgbevf_ipsec *ipsec, bool rxtable)
141 {
142 u32 i;
143
144 if (rxtable) {
145 if (ipsec->num_rx_sa == IXGBE_IPSEC_MAX_SA_COUNT)
146 return -ENOSPC;
147
148 /* search rx sa table */
149 for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) {
150 if (!ipsec->rx_tbl[i].used)
151 return i;
152 }
153 } else {
154 if (ipsec->num_tx_sa == IXGBE_IPSEC_MAX_SA_COUNT)
155 return -ENOSPC;
156
157 /* search tx sa table */
158 for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) {
159 if (!ipsec->tx_tbl[i].used)
160 return i;
161 }
162 }
163
164 return -ENOSPC;
165 }
166
167 /**
168 * ixgbevf_ipsec_find_rx_state - find the state that matches
169 * @ipsec: pointer to IPsec struct
170 * @daddr: inbound address to match
171 * @proto: protocol to match
172 * @spi: SPI to match
173 * @ip4: true if using an IPv4 address
174 *
175 * Returns a pointer to the matching SA state information
176 **/
177 static
ixgbevf_ipsec_find_rx_state(struct ixgbevf_ipsec * ipsec,__be32 * daddr,u8 proto,__be32 spi,bool ip4)178 struct xfrm_state *ixgbevf_ipsec_find_rx_state(struct ixgbevf_ipsec *ipsec,
179 __be32 *daddr, u8 proto,
180 __be32 spi, bool ip4)
181 {
182 struct xfrm_state *ret = NULL;
183 struct rx_sa *rsa;
184
185 rcu_read_lock();
186 hash_for_each_possible_rcu(ipsec->rx_sa_list, rsa, hlist,
187 (__force u32)spi) {
188 if (spi == rsa->xs->id.spi &&
189 ((ip4 && *daddr == rsa->xs->id.daddr.a4) ||
190 (!ip4 && !memcmp(daddr, &rsa->xs->id.daddr.a6,
191 sizeof(rsa->xs->id.daddr.a6)))) &&
192 proto == rsa->xs->id.proto) {
193 ret = rsa->xs;
194 xfrm_state_hold(ret);
195 break;
196 }
197 }
198 rcu_read_unlock();
199 return ret;
200 }
201
202 /**
203 * ixgbevf_ipsec_parse_proto_keys - find the key and salt based on the protocol
204 * @xs: pointer to xfrm_state struct
205 * @mykey: pointer to key array to populate
206 * @mysalt: pointer to salt value to populate
207 *
208 * This copies the protocol keys and salt to our own data tables. The
209 * 82599 family only supports the one algorithm.
210 **/
ixgbevf_ipsec_parse_proto_keys(struct xfrm_state * xs,u32 * mykey,u32 * mysalt)211 static int ixgbevf_ipsec_parse_proto_keys(struct xfrm_state *xs,
212 u32 *mykey, u32 *mysalt)
213 {
214 struct net_device *dev = xs->xso.real_dev;
215 unsigned char *key_data;
216 char *alg_name = NULL;
217 int key_len;
218
219 if (!xs->aead) {
220 netdev_err(dev, "Unsupported IPsec algorithm\n");
221 return -EINVAL;
222 }
223
224 if (xs->aead->alg_icv_len != IXGBE_IPSEC_AUTH_BITS) {
225 netdev_err(dev, "IPsec offload requires %d bit authentication\n",
226 IXGBE_IPSEC_AUTH_BITS);
227 return -EINVAL;
228 }
229
230 key_data = &xs->aead->alg_key[0];
231 key_len = xs->aead->alg_key_len;
232 alg_name = xs->aead->alg_name;
233
234 if (strcmp(alg_name, aes_gcm_name)) {
235 netdev_err(dev, "Unsupported IPsec algorithm - please use %s\n",
236 aes_gcm_name);
237 return -EINVAL;
238 }
239
240 /* The key bytes come down in a big endian array of bytes, so
241 * we don't need to do any byte swapping.
242 * 160 accounts for 16 byte key and 4 byte salt
243 */
244 if (key_len > IXGBE_IPSEC_KEY_BITS) {
245 *mysalt = ((u32 *)key_data)[4];
246 } else if (key_len == IXGBE_IPSEC_KEY_BITS) {
247 *mysalt = 0;
248 } else {
249 netdev_err(dev, "IPsec hw offload only supports keys up to 128 bits with a 32 bit salt\n");
250 return -EINVAL;
251 }
252 memcpy(mykey, key_data, 16);
253
254 return 0;
255 }
256
257 /**
258 * ixgbevf_ipsec_add_sa - program device with a security association
259 * @xs: pointer to transformer state struct
260 * @extack: extack point to fill failure reason
261 **/
ixgbevf_ipsec_add_sa(struct xfrm_state * xs,struct netlink_ext_ack * extack)262 static int ixgbevf_ipsec_add_sa(struct xfrm_state *xs,
263 struct netlink_ext_ack *extack)
264 {
265 struct net_device *dev = xs->xso.real_dev;
266 struct ixgbevf_adapter *adapter;
267 struct ixgbevf_ipsec *ipsec;
268 u16 sa_idx;
269 int ret;
270
271 adapter = netdev_priv(dev);
272 ipsec = adapter->ipsec;
273
274 if (xs->id.proto != IPPROTO_ESP && xs->id.proto != IPPROTO_AH) {
275 NL_SET_ERR_MSG_MOD(extack, "Unsupported protocol for IPsec offload");
276 return -EINVAL;
277 }
278
279 if (xs->props.mode != XFRM_MODE_TRANSPORT) {
280 NL_SET_ERR_MSG_MOD(extack, "Unsupported mode for ipsec offload");
281 return -EINVAL;
282 }
283
284 if (xs->xso.type != XFRM_DEV_OFFLOAD_CRYPTO) {
285 NL_SET_ERR_MSG_MOD(extack, "Unsupported ipsec offload type");
286 return -EINVAL;
287 }
288
289 if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) {
290 struct rx_sa rsa;
291
292 if (xs->calg) {
293 NL_SET_ERR_MSG_MOD(extack, "Compression offload not supported");
294 return -EINVAL;
295 }
296
297 /* find the first unused index */
298 ret = ixgbevf_ipsec_find_empty_idx(ipsec, true);
299 if (ret < 0) {
300 NL_SET_ERR_MSG_MOD(extack, "No space for SA in Rx table!");
301 return ret;
302 }
303 sa_idx = (u16)ret;
304
305 memset(&rsa, 0, sizeof(rsa));
306 rsa.used = true;
307 rsa.xs = xs;
308
309 if (rsa.xs->id.proto & IPPROTO_ESP)
310 rsa.decrypt = xs->ealg || xs->aead;
311
312 /* get the key and salt */
313 ret = ixgbevf_ipsec_parse_proto_keys(xs, rsa.key, &rsa.salt);
314 if (ret) {
315 NL_SET_ERR_MSG_MOD(extack, "Failed to get key data for Rx SA table");
316 return ret;
317 }
318
319 /* get ip for rx sa table */
320 if (xs->props.family == AF_INET6)
321 memcpy(rsa.ipaddr, &xs->id.daddr.a6, 16);
322 else
323 memcpy(&rsa.ipaddr[3], &xs->id.daddr.a4, 4);
324
325 rsa.mode = IXGBE_RXMOD_VALID;
326 if (rsa.xs->id.proto & IPPROTO_ESP)
327 rsa.mode |= IXGBE_RXMOD_PROTO_ESP;
328 if (rsa.decrypt)
329 rsa.mode |= IXGBE_RXMOD_DECRYPT;
330 if (rsa.xs->props.family == AF_INET6)
331 rsa.mode |= IXGBE_RXMOD_IPV6;
332
333 ret = ixgbevf_ipsec_set_pf_sa(adapter, xs);
334 if (ret < 0)
335 return ret;
336 rsa.pfsa = ret;
337
338 /* the preparations worked, so save the info */
339 memcpy(&ipsec->rx_tbl[sa_idx], &rsa, sizeof(rsa));
340
341 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_RX_INDEX;
342
343 ipsec->num_rx_sa++;
344
345 /* hash the new entry for faster search in Rx path */
346 hash_add_rcu(ipsec->rx_sa_list, &ipsec->rx_tbl[sa_idx].hlist,
347 (__force u32)rsa.xs->id.spi);
348 } else {
349 struct tx_sa tsa;
350
351 /* find the first unused index */
352 ret = ixgbevf_ipsec_find_empty_idx(ipsec, false);
353 if (ret < 0) {
354 NL_SET_ERR_MSG_MOD(extack, "No space for SA in Tx table");
355 return ret;
356 }
357 sa_idx = (u16)ret;
358
359 memset(&tsa, 0, sizeof(tsa));
360 tsa.used = true;
361 tsa.xs = xs;
362
363 if (xs->id.proto & IPPROTO_ESP)
364 tsa.encrypt = xs->ealg || xs->aead;
365
366 ret = ixgbevf_ipsec_parse_proto_keys(xs, tsa.key, &tsa.salt);
367 if (ret) {
368 NL_SET_ERR_MSG_MOD(extack, "Failed to get key data for Tx SA table");
369 memset(&tsa, 0, sizeof(tsa));
370 return ret;
371 }
372
373 ret = ixgbevf_ipsec_set_pf_sa(adapter, xs);
374 if (ret < 0)
375 return ret;
376 tsa.pfsa = ret;
377
378 /* the preparations worked, so save the info */
379 memcpy(&ipsec->tx_tbl[sa_idx], &tsa, sizeof(tsa));
380
381 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_TX_INDEX;
382
383 ipsec->num_tx_sa++;
384 }
385
386 return 0;
387 }
388
389 /**
390 * ixgbevf_ipsec_del_sa - clear out this specific SA
391 * @xs: pointer to transformer state struct
392 **/
ixgbevf_ipsec_del_sa(struct xfrm_state * xs)393 static void ixgbevf_ipsec_del_sa(struct xfrm_state *xs)
394 {
395 struct net_device *dev = xs->xso.real_dev;
396 struct ixgbevf_adapter *adapter;
397 struct ixgbevf_ipsec *ipsec;
398 u16 sa_idx;
399
400 adapter = netdev_priv(dev);
401 ipsec = adapter->ipsec;
402
403 if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) {
404 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_RX_INDEX;
405
406 if (!ipsec->rx_tbl[sa_idx].used) {
407 netdev_err(dev, "Invalid Rx SA selected sa_idx=%d offload_handle=%lu\n",
408 sa_idx, xs->xso.offload_handle);
409 return;
410 }
411
412 ixgbevf_ipsec_del_pf_sa(adapter, ipsec->rx_tbl[sa_idx].pfsa);
413 hash_del_rcu(&ipsec->rx_tbl[sa_idx].hlist);
414 memset(&ipsec->rx_tbl[sa_idx], 0, sizeof(struct rx_sa));
415 ipsec->num_rx_sa--;
416 } else {
417 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX;
418
419 if (!ipsec->tx_tbl[sa_idx].used) {
420 netdev_err(dev, "Invalid Tx SA selected sa_idx=%d offload_handle=%lu\n",
421 sa_idx, xs->xso.offload_handle);
422 return;
423 }
424
425 ixgbevf_ipsec_del_pf_sa(adapter, ipsec->tx_tbl[sa_idx].pfsa);
426 memset(&ipsec->tx_tbl[sa_idx], 0, sizeof(struct tx_sa));
427 ipsec->num_tx_sa--;
428 }
429 }
430
431 static const struct xfrmdev_ops ixgbevf_xfrmdev_ops = {
432 .xdo_dev_state_add = ixgbevf_ipsec_add_sa,
433 .xdo_dev_state_delete = ixgbevf_ipsec_del_sa,
434 };
435
436 /**
437 * ixgbevf_ipsec_tx - setup Tx flags for IPsec offload
438 * @tx_ring: outgoing context
439 * @first: current data packet
440 * @itd: ipsec Tx data for later use in building context descriptor
441 **/
ixgbevf_ipsec_tx(struct ixgbevf_ring * tx_ring,struct ixgbevf_tx_buffer * first,struct ixgbevf_ipsec_tx_data * itd)442 int ixgbevf_ipsec_tx(struct ixgbevf_ring *tx_ring,
443 struct ixgbevf_tx_buffer *first,
444 struct ixgbevf_ipsec_tx_data *itd)
445 {
446 struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
447 struct ixgbevf_ipsec *ipsec = adapter->ipsec;
448 struct xfrm_state *xs;
449 struct sec_path *sp;
450 struct tx_sa *tsa;
451 u16 sa_idx;
452
453 sp = skb_sec_path(first->skb);
454 if (unlikely(!sp->len)) {
455 netdev_err(tx_ring->netdev, "%s: no xfrm state len = %d\n",
456 __func__, sp->len);
457 return 0;
458 }
459
460 xs = xfrm_input_state(first->skb);
461 if (unlikely(!xs)) {
462 netdev_err(tx_ring->netdev, "%s: no xfrm_input_state() xs = %p\n",
463 __func__, xs);
464 return 0;
465 }
466
467 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX;
468 if (unlikely(sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT)) {
469 netdev_err(tx_ring->netdev, "%s: bad sa_idx=%d handle=%lu\n",
470 __func__, sa_idx, xs->xso.offload_handle);
471 return 0;
472 }
473
474 tsa = &ipsec->tx_tbl[sa_idx];
475 if (unlikely(!tsa->used)) {
476 netdev_err(tx_ring->netdev, "%s: unused sa_idx=%d\n",
477 __func__, sa_idx);
478 return 0;
479 }
480
481 itd->pfsa = tsa->pfsa - IXGBE_IPSEC_BASE_TX_INDEX;
482
483 first->tx_flags |= IXGBE_TX_FLAGS_IPSEC | IXGBE_TX_FLAGS_CSUM;
484
485 if (xs->id.proto == IPPROTO_ESP) {
486 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_TYPE_ESP |
487 IXGBE_ADVTXD_TUCMD_L4T_TCP;
488 if (first->protocol == htons(ETH_P_IP))
489 itd->flags |= IXGBE_ADVTXD_TUCMD_IPV4;
490
491 /* The actual trailer length is authlen (16 bytes) plus
492 * 2 bytes for the proto and the padlen values, plus
493 * padlen bytes of padding. This ends up not the same
494 * as the static value found in xs->props.trailer_len (21).
495 *
496 * ... but if we're doing GSO, don't bother as the stack
497 * doesn't add a trailer for those.
498 */
499 if (!skb_is_gso(first->skb)) {
500 /* The "correct" way to get the auth length would be
501 * to use
502 * authlen = crypto_aead_authsize(xs->data);
503 * but since we know we only have one size to worry
504 * about * we can let the compiler use the constant
505 * and save us a few CPU cycles.
506 */
507 const int authlen = IXGBE_IPSEC_AUTH_BITS / 8;
508 struct sk_buff *skb = first->skb;
509 u8 padlen;
510 int ret;
511
512 ret = skb_copy_bits(skb, skb->len - (authlen + 2),
513 &padlen, 1);
514 if (unlikely(ret))
515 return 0;
516 itd->trailer_len = authlen + 2 + padlen;
517 }
518 }
519 if (tsa->encrypt)
520 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_ENCRYPT_EN;
521
522 return 1;
523 }
524
525 /**
526 * ixgbevf_ipsec_rx - decode IPsec bits from Rx descriptor
527 * @rx_ring: receiving ring
528 * @rx_desc: receive data descriptor
529 * @skb: current data packet
530 *
531 * Determine if there was an IPsec encapsulation noticed, and if so set up
532 * the resulting status for later in the receive stack.
533 **/
ixgbevf_ipsec_rx(struct ixgbevf_ring * rx_ring,union ixgbe_adv_rx_desc * rx_desc,struct sk_buff * skb)534 void ixgbevf_ipsec_rx(struct ixgbevf_ring *rx_ring,
535 union ixgbe_adv_rx_desc *rx_desc,
536 struct sk_buff *skb)
537 {
538 struct ixgbevf_adapter *adapter = netdev_priv(rx_ring->netdev);
539 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
540 __le16 ipsec_pkt_types = cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH |
541 IXGBE_RXDADV_PKTTYPE_IPSEC_ESP);
542 struct ixgbevf_ipsec *ipsec = adapter->ipsec;
543 struct xfrm_offload *xo = NULL;
544 struct xfrm_state *xs = NULL;
545 struct ipv6hdr *ip6 = NULL;
546 struct iphdr *ip4 = NULL;
547 struct sec_path *sp;
548 void *daddr;
549 __be32 spi;
550 u8 *c_hdr;
551 u8 proto;
552
553 /* Find the IP and crypto headers in the data.
554 * We can assume no VLAN header in the way, b/c the
555 * hw won't recognize the IPsec packet and anyway the
556 * currently VLAN device doesn't support xfrm offload.
557 */
558 if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV4)) {
559 ip4 = (struct iphdr *)(skb->data + ETH_HLEN);
560 daddr = &ip4->daddr;
561 c_hdr = (u8 *)ip4 + ip4->ihl * 4;
562 } else if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV6)) {
563 ip6 = (struct ipv6hdr *)(skb->data + ETH_HLEN);
564 daddr = &ip6->daddr;
565 c_hdr = (u8 *)ip6 + sizeof(struct ipv6hdr);
566 } else {
567 return;
568 }
569
570 switch (pkt_info & ipsec_pkt_types) {
571 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH):
572 spi = ((struct ip_auth_hdr *)c_hdr)->spi;
573 proto = IPPROTO_AH;
574 break;
575 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_ESP):
576 spi = ((struct ip_esp_hdr *)c_hdr)->spi;
577 proto = IPPROTO_ESP;
578 break;
579 default:
580 return;
581 }
582
583 xs = ixgbevf_ipsec_find_rx_state(ipsec, daddr, proto, spi, !!ip4);
584 if (unlikely(!xs))
585 return;
586
587 sp = secpath_set(skb);
588 if (unlikely(!sp))
589 return;
590
591 sp->xvec[sp->len++] = xs;
592 sp->olen++;
593 xo = xfrm_offload(skb);
594 xo->flags = CRYPTO_DONE;
595 xo->status = CRYPTO_SUCCESS;
596
597 adapter->rx_ipsec++;
598 }
599
600 /**
601 * ixgbevf_init_ipsec_offload - initialize registers for IPsec operation
602 * @adapter: board private structure
603 **/
ixgbevf_init_ipsec_offload(struct ixgbevf_adapter * adapter)604 void ixgbevf_init_ipsec_offload(struct ixgbevf_adapter *adapter)
605 {
606 struct ixgbevf_ipsec *ipsec;
607 size_t size;
608
609 switch (adapter->hw.api_version) {
610 case ixgbe_mbox_api_14:
611 break;
612 default:
613 return;
614 }
615
616 ipsec = kzalloc(sizeof(*ipsec), GFP_KERNEL);
617 if (!ipsec)
618 goto err1;
619 hash_init(ipsec->rx_sa_list);
620
621 size = sizeof(struct rx_sa) * IXGBE_IPSEC_MAX_SA_COUNT;
622 ipsec->rx_tbl = kzalloc(size, GFP_KERNEL);
623 if (!ipsec->rx_tbl)
624 goto err2;
625
626 size = sizeof(struct tx_sa) * IXGBE_IPSEC_MAX_SA_COUNT;
627 ipsec->tx_tbl = kzalloc(size, GFP_KERNEL);
628 if (!ipsec->tx_tbl)
629 goto err2;
630
631 ipsec->num_rx_sa = 0;
632 ipsec->num_tx_sa = 0;
633
634 adapter->ipsec = ipsec;
635
636 adapter->netdev->xfrmdev_ops = &ixgbevf_xfrmdev_ops;
637
638 #define IXGBEVF_ESP_FEATURES (NETIF_F_HW_ESP | \
639 NETIF_F_HW_ESP_TX_CSUM | \
640 NETIF_F_GSO_ESP)
641
642 adapter->netdev->features |= IXGBEVF_ESP_FEATURES;
643 adapter->netdev->hw_enc_features |= IXGBEVF_ESP_FEATURES;
644
645 return;
646
647 err2:
648 kfree(ipsec->rx_tbl);
649 kfree(ipsec->tx_tbl);
650 kfree(ipsec);
651 err1:
652 netdev_err(adapter->netdev, "Unable to allocate memory for SA tables");
653 }
654
655 /**
656 * ixgbevf_stop_ipsec_offload - tear down the IPsec offload
657 * @adapter: board private structure
658 **/
ixgbevf_stop_ipsec_offload(struct ixgbevf_adapter * adapter)659 void ixgbevf_stop_ipsec_offload(struct ixgbevf_adapter *adapter)
660 {
661 struct ixgbevf_ipsec *ipsec = adapter->ipsec;
662
663 adapter->ipsec = NULL;
664 if (ipsec) {
665 kfree(ipsec->rx_tbl);
666 kfree(ipsec->tx_tbl);
667 kfree(ipsec);
668 }
669 }
670