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1// SPDX-License-Identifier: GPL-2.02/* 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 1609static const char aes_gcm_name[] = "rfc4106(gcm(aes))";10 11/**12 * ixgbevf_ipsec_set_pf_sa - ask the PF to set up an SA13 * @adapter: board private structure14 * @xs: xfrm info to be sent to the PF15 *16 * Returns: positive offload handle from the PF, or negative error code17 **/18static 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 else36 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 55out: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 SA63 * @adapter: board private structure64 * @pfsa: sa index returned from PF when created, -1 for all65 *66 * Returns: 0 on success, or negative error code67 **/68static 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 88out:89 spin_unlock_bh(&adapter->mbx_lock);90 return err;91}92 93/**94 * ixgbevf_ipsec_restore - restore the IPsec HW settings after a reset95 * @adapter: board private structure96 *97 * Reload the HW tables from the SW tables after they've been bashed98 * by a chip reset. While we're here, make sure any stale VF data is99 * removed, since we go through reset when num_vfs changes.100 **/101void 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 index134 * @ipsec: pointer to IPsec struct135 * @rxtable: true if we need to look in the Rx table136 *137 * Returns the first unused index in either the Rx or Tx SA table138 **/139static140int 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 matches169 * @ipsec: pointer to IPsec struct170 * @daddr: inbound address to match171 * @proto: protocol to match172 * @spi: SPI to match173 * @ip4: true if using an IPv4 address174 *175 * Returns a pointer to the matching SA state information176 **/177static178struct 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 protocol204 * @xs: pointer to xfrm_state struct205 * @mykey: pointer to key array to populate206 * @mysalt: pointer to salt value to populate207 *208 * This copies the protocol keys and salt to our own data tables. The209 * 82599 family only supports the one algorithm.210 **/211static 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, so241 * we don't need to do any byte swapping.242 * 160 accounts for 16 byte key and 4 byte salt243 */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 association259 * @xs: pointer to transformer state struct260 * @extack: extack point to fill failure reason261 **/262static 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 else323 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 SA391 * @xs: pointer to transformer state struct392 **/393static 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/**432 * ixgbevf_ipsec_offload_ok - can this packet use the xfrm hw offload433 * @skb: current data packet434 * @xs: pointer to transformer state struct435 **/436static bool ixgbevf_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs)437{438 if (xs->props.family == AF_INET) {439 /* Offload with IPv4 options is not supported yet */440 if (ip_hdr(skb)->ihl != 5)441 return false;442 } else {443 /* Offload with IPv6 extension headers is not support yet */444 if (ipv6_ext_hdr(ipv6_hdr(skb)->nexthdr))445 return false;446 }447 448 return true;449}450 451static const struct xfrmdev_ops ixgbevf_xfrmdev_ops = {452 .xdo_dev_state_add = ixgbevf_ipsec_add_sa,453 .xdo_dev_state_delete = ixgbevf_ipsec_del_sa,454 .xdo_dev_offload_ok = ixgbevf_ipsec_offload_ok,455};456 457/**458 * ixgbevf_ipsec_tx - setup Tx flags for IPsec offload459 * @tx_ring: outgoing context460 * @first: current data packet461 * @itd: ipsec Tx data for later use in building context descriptor462 **/463int ixgbevf_ipsec_tx(struct ixgbevf_ring *tx_ring,464 struct ixgbevf_tx_buffer *first,465 struct ixgbevf_ipsec_tx_data *itd)466{467 struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);468 struct ixgbevf_ipsec *ipsec = adapter->ipsec;469 struct xfrm_state *xs;470 struct sec_path *sp;471 struct tx_sa *tsa;472 u16 sa_idx;473 474 sp = skb_sec_path(first->skb);475 if (unlikely(!sp->len)) {476 netdev_err(tx_ring->netdev, "%s: no xfrm state len = %d\n",477 __func__, sp->len);478 return 0;479 }480 481 xs = xfrm_input_state(first->skb);482 if (unlikely(!xs)) {483 netdev_err(tx_ring->netdev, "%s: no xfrm_input_state() xs = %p\n",484 __func__, xs);485 return 0;486 }487 488 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX;489 if (unlikely(sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT)) {490 netdev_err(tx_ring->netdev, "%s: bad sa_idx=%d handle=%lu\n",491 __func__, sa_idx, xs->xso.offload_handle);492 return 0;493 }494 495 tsa = &ipsec->tx_tbl[sa_idx];496 if (unlikely(!tsa->used)) {497 netdev_err(tx_ring->netdev, "%s: unused sa_idx=%d\n",498 __func__, sa_idx);499 return 0;500 }501 502 itd->pfsa = tsa->pfsa - IXGBE_IPSEC_BASE_TX_INDEX;503 504 first->tx_flags |= IXGBE_TX_FLAGS_IPSEC | IXGBE_TX_FLAGS_CSUM;505 506 if (xs->id.proto == IPPROTO_ESP) {507 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_TYPE_ESP |508 IXGBE_ADVTXD_TUCMD_L4T_TCP;509 if (first->protocol == htons(ETH_P_IP))510 itd->flags |= IXGBE_ADVTXD_TUCMD_IPV4;511 512 /* The actual trailer length is authlen (16 bytes) plus513 * 2 bytes for the proto and the padlen values, plus514 * padlen bytes of padding. This ends up not the same515 * as the static value found in xs->props.trailer_len (21).516 *517 * ... but if we're doing GSO, don't bother as the stack518 * doesn't add a trailer for those.519 */520 if (!skb_is_gso(first->skb)) {521 /* The "correct" way to get the auth length would be522 * to use523 * authlen = crypto_aead_authsize(xs->data);524 * but since we know we only have one size to worry525 * about * we can let the compiler use the constant526 * and save us a few CPU cycles.527 */528 const int authlen = IXGBE_IPSEC_AUTH_BITS / 8;529 struct sk_buff *skb = first->skb;530 u8 padlen;531 int ret;532 533 ret = skb_copy_bits(skb, skb->len - (authlen + 2),534 &padlen, 1);535 if (unlikely(ret))536 return 0;537 itd->trailer_len = authlen + 2 + padlen;538 }539 }540 if (tsa->encrypt)541 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_ENCRYPT_EN;542 543 return 1;544}545 546/**547 * ixgbevf_ipsec_rx - decode IPsec bits from Rx descriptor548 * @rx_ring: receiving ring549 * @rx_desc: receive data descriptor550 * @skb: current data packet551 *552 * Determine if there was an IPsec encapsulation noticed, and if so set up553 * the resulting status for later in the receive stack.554 **/555void ixgbevf_ipsec_rx(struct ixgbevf_ring *rx_ring,556 union ixgbe_adv_rx_desc *rx_desc,557 struct sk_buff *skb)558{559 struct ixgbevf_adapter *adapter = netdev_priv(rx_ring->netdev);560 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;561 __le16 ipsec_pkt_types = cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH |562 IXGBE_RXDADV_PKTTYPE_IPSEC_ESP);563 struct ixgbevf_ipsec *ipsec = adapter->ipsec;564 struct xfrm_offload *xo = NULL;565 struct xfrm_state *xs = NULL;566 struct ipv6hdr *ip6 = NULL;567 struct iphdr *ip4 = NULL;568 struct sec_path *sp;569 void *daddr;570 __be32 spi;571 u8 *c_hdr;572 u8 proto;573 574 /* Find the IP and crypto headers in the data.575 * We can assume no VLAN header in the way, b/c the576 * hw won't recognize the IPsec packet and anyway the577 * currently VLAN device doesn't support xfrm offload.578 */579 if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV4)) {580 ip4 = (struct iphdr *)(skb->data + ETH_HLEN);581 daddr = &ip4->daddr;582 c_hdr = (u8 *)ip4 + ip4->ihl * 4;583 } else if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV6)) {584 ip6 = (struct ipv6hdr *)(skb->data + ETH_HLEN);585 daddr = &ip6->daddr;586 c_hdr = (u8 *)ip6 + sizeof(struct ipv6hdr);587 } else {588 return;589 }590 591 switch (pkt_info & ipsec_pkt_types) {592 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH):593 spi = ((struct ip_auth_hdr *)c_hdr)->spi;594 proto = IPPROTO_AH;595 break;596 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_ESP):597 spi = ((struct ip_esp_hdr *)c_hdr)->spi;598 proto = IPPROTO_ESP;599 break;600 default:601 return;602 }603 604 xs = ixgbevf_ipsec_find_rx_state(ipsec, daddr, proto, spi, !!ip4);605 if (unlikely(!xs))606 return;607 608 sp = secpath_set(skb);609 if (unlikely(!sp))610 return;611 612 sp->xvec[sp->len++] = xs;613 sp->olen++;614 xo = xfrm_offload(skb);615 xo->flags = CRYPTO_DONE;616 xo->status = CRYPTO_SUCCESS;617 618 adapter->rx_ipsec++;619}620 621/**622 * ixgbevf_init_ipsec_offload - initialize registers for IPsec operation623 * @adapter: board private structure624 **/625void ixgbevf_init_ipsec_offload(struct ixgbevf_adapter *adapter)626{627 struct ixgbevf_ipsec *ipsec;628 size_t size;629 630 switch (adapter->hw.api_version) {631 case ixgbe_mbox_api_14:632 case ixgbe_mbox_api_15:633 break;634 default:635 return;636 }637 638 ipsec = kzalloc(sizeof(*ipsec), GFP_KERNEL);639 if (!ipsec)640 goto err1;641 hash_init(ipsec->rx_sa_list);642 643 size = sizeof(struct rx_sa) * IXGBE_IPSEC_MAX_SA_COUNT;644 ipsec->rx_tbl = kzalloc(size, GFP_KERNEL);645 if (!ipsec->rx_tbl)646 goto err2;647 648 size = sizeof(struct tx_sa) * IXGBE_IPSEC_MAX_SA_COUNT;649 ipsec->tx_tbl = kzalloc(size, GFP_KERNEL);650 if (!ipsec->tx_tbl)651 goto err2;652 653 ipsec->num_rx_sa = 0;654 ipsec->num_tx_sa = 0;655 656 adapter->ipsec = ipsec;657 658 adapter->netdev->xfrmdev_ops = &ixgbevf_xfrmdev_ops;659 660#define IXGBEVF_ESP_FEATURES (NETIF_F_HW_ESP | \661 NETIF_F_HW_ESP_TX_CSUM | \662 NETIF_F_GSO_ESP)663 664 adapter->netdev->features |= IXGBEVF_ESP_FEATURES;665 adapter->netdev->hw_enc_features |= IXGBEVF_ESP_FEATURES;666 667 return;668 669err2:670 kfree(ipsec->rx_tbl);671 kfree(ipsec->tx_tbl);672 kfree(ipsec);673err1:674 netdev_err(adapter->netdev, "Unable to allocate memory for SA tables");675}676 677/**678 * ixgbevf_stop_ipsec_offload - tear down the IPsec offload679 * @adapter: board private structure680 **/681void ixgbevf_stop_ipsec_offload(struct ixgbevf_adapter *adapter)682{683 struct ixgbevf_ipsec *ipsec = adapter->ipsec;684 685 adapter->ipsec = NULL;686 if (ipsec) {687 kfree(ipsec->rx_tbl);688 kfree(ipsec->tx_tbl);689 kfree(ipsec);690 }691}692