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 **/ 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 **/ 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 **/ 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 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 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 * @dev: pointer to net device to program 205 * @xs: pointer to xfrm_state struct 206 * @mykey: pointer to key array to populate 207 * @mysalt: pointer to salt value to populate 208 * 209 * This copies the protocol keys and salt to our own data tables. The 210 * 82599 family only supports the one algorithm. 211 **/ 212 static int ixgbevf_ipsec_parse_proto_keys(struct net_device *dev, 213 struct xfrm_state *xs, 214 u32 *mykey, u32 *mysalt) 215 { 216 unsigned char *key_data; 217 char *alg_name = NULL; 218 int key_len; 219 220 if (!xs->aead) { 221 netdev_err(dev, "Unsupported IPsec algorithm\n"); 222 return -EINVAL; 223 } 224 225 if (xs->aead->alg_icv_len != IXGBE_IPSEC_AUTH_BITS) { 226 netdev_err(dev, "IPsec offload requires %d bit authentication\n", 227 IXGBE_IPSEC_AUTH_BITS); 228 return -EINVAL; 229 } 230 231 key_data = &xs->aead->alg_key[0]; 232 key_len = xs->aead->alg_key_len; 233 alg_name = xs->aead->alg_name; 234 235 if (strcmp(alg_name, aes_gcm_name)) { 236 netdev_err(dev, "Unsupported IPsec algorithm - please use %s\n", 237 aes_gcm_name); 238 return -EINVAL; 239 } 240 241 /* The key bytes come down in a big endian array of bytes, so 242 * we don't need to do any byte swapping. 243 * 160 accounts for 16 byte key and 4 byte salt 244 */ 245 if (key_len > IXGBE_IPSEC_KEY_BITS) { 246 *mysalt = ((u32 *)key_data)[4]; 247 } else if (key_len == IXGBE_IPSEC_KEY_BITS) { 248 *mysalt = 0; 249 } else { 250 netdev_err(dev, "IPsec hw offload only supports keys up to 128 bits with a 32 bit salt\n"); 251 return -EINVAL; 252 } 253 memcpy(mykey, key_data, 16); 254 255 return 0; 256 } 257 258 /** 259 * ixgbevf_ipsec_add_sa - program device with a security association 260 * @dev: pointer to net device to program 261 * @xs: pointer to transformer state struct 262 * @extack: extack point to fill failure reason 263 **/ 264 static int ixgbevf_ipsec_add_sa(struct net_device *dev, 265 struct xfrm_state *xs, 266 struct netlink_ext_ack *extack) 267 { 268 struct ixgbevf_adapter *adapter; 269 struct ixgbevf_ipsec *ipsec; 270 u16 sa_idx; 271 int ret; 272 273 adapter = netdev_priv(dev); 274 ipsec = adapter->ipsec; 275 276 if (xs->id.proto != IPPROTO_ESP && xs->id.proto != IPPROTO_AH) { 277 NL_SET_ERR_MSG_MOD(extack, "Unsupported protocol for IPsec offload"); 278 return -EINVAL; 279 } 280 281 if (xs->props.mode != XFRM_MODE_TRANSPORT) { 282 NL_SET_ERR_MSG_MOD(extack, "Unsupported mode for ipsec offload"); 283 return -EINVAL; 284 } 285 286 if (xs->xso.type != XFRM_DEV_OFFLOAD_CRYPTO) { 287 NL_SET_ERR_MSG_MOD(extack, "Unsupported ipsec offload type"); 288 return -EINVAL; 289 } 290 291 if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) { 292 struct rx_sa rsa; 293 294 if (xs->calg) { 295 NL_SET_ERR_MSG_MOD(extack, "Compression offload not supported"); 296 return -EINVAL; 297 } 298 299 /* find the first unused index */ 300 ret = ixgbevf_ipsec_find_empty_idx(ipsec, true); 301 if (ret < 0) { 302 NL_SET_ERR_MSG_MOD(extack, "No space for SA in Rx table!"); 303 return ret; 304 } 305 sa_idx = (u16)ret; 306 307 memset(&rsa, 0, sizeof(rsa)); 308 rsa.used = true; 309 rsa.xs = xs; 310 311 if (rsa.xs->id.proto & IPPROTO_ESP) 312 rsa.decrypt = xs->ealg || xs->aead; 313 314 /* get the key and salt */ 315 ret = ixgbevf_ipsec_parse_proto_keys(dev, xs, rsa.key, 316 &rsa.salt); 317 if (ret) { 318 NL_SET_ERR_MSG_MOD(extack, "Failed to get key data for Rx SA table"); 319 return ret; 320 } 321 322 /* get ip for rx sa table */ 323 if (xs->props.family == AF_INET6) 324 memcpy(rsa.ipaddr, &xs->id.daddr.a6, 16); 325 else 326 memcpy(&rsa.ipaddr[3], &xs->id.daddr.a4, 4); 327 328 rsa.mode = IXGBE_RXMOD_VALID; 329 if (rsa.xs->id.proto & IPPROTO_ESP) 330 rsa.mode |= IXGBE_RXMOD_PROTO_ESP; 331 if (rsa.decrypt) 332 rsa.mode |= IXGBE_RXMOD_DECRYPT; 333 if (rsa.xs->props.family == AF_INET6) 334 rsa.mode |= IXGBE_RXMOD_IPV6; 335 336 ret = ixgbevf_ipsec_set_pf_sa(adapter, xs); 337 if (ret < 0) 338 return ret; 339 rsa.pfsa = ret; 340 341 /* the preparations worked, so save the info */ 342 memcpy(&ipsec->rx_tbl[sa_idx], &rsa, sizeof(rsa)); 343 344 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_RX_INDEX; 345 346 ipsec->num_rx_sa++; 347 348 /* hash the new entry for faster search in Rx path */ 349 hash_add_rcu(ipsec->rx_sa_list, &ipsec->rx_tbl[sa_idx].hlist, 350 (__force u32)rsa.xs->id.spi); 351 } else { 352 struct tx_sa tsa; 353 354 /* find the first unused index */ 355 ret = ixgbevf_ipsec_find_empty_idx(ipsec, false); 356 if (ret < 0) { 357 NL_SET_ERR_MSG_MOD(extack, "No space for SA in Tx table"); 358 return ret; 359 } 360 sa_idx = (u16)ret; 361 362 memset(&tsa, 0, sizeof(tsa)); 363 tsa.used = true; 364 tsa.xs = xs; 365 366 if (xs->id.proto & IPPROTO_ESP) 367 tsa.encrypt = xs->ealg || xs->aead; 368 369 ret = ixgbevf_ipsec_parse_proto_keys(dev, xs, tsa.key, 370 &tsa.salt); 371 if (ret) { 372 NL_SET_ERR_MSG_MOD(extack, "Failed to get key data for Tx SA table"); 373 memset(&tsa, 0, sizeof(tsa)); 374 return ret; 375 } 376 377 ret = ixgbevf_ipsec_set_pf_sa(adapter, xs); 378 if (ret < 0) 379 return ret; 380 tsa.pfsa = ret; 381 382 /* the preparations worked, so save the info */ 383 memcpy(&ipsec->tx_tbl[sa_idx], &tsa, sizeof(tsa)); 384 385 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_TX_INDEX; 386 387 ipsec->num_tx_sa++; 388 } 389 390 return 0; 391 } 392 393 /** 394 * ixgbevf_ipsec_del_sa - clear out this specific SA 395 * @dev: pointer to net device to program 396 * @xs: pointer to transformer state struct 397 **/ 398 static void ixgbevf_ipsec_del_sa(struct net_device *dev, 399 struct xfrm_state *xs) 400 { 401 struct ixgbevf_adapter *adapter; 402 struct ixgbevf_ipsec *ipsec; 403 u16 sa_idx; 404 405 adapter = netdev_priv(dev); 406 ipsec = adapter->ipsec; 407 408 if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) { 409 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_RX_INDEX; 410 411 if (!ipsec->rx_tbl[sa_idx].used) { 412 netdev_err(dev, "Invalid Rx SA selected sa_idx=%d offload_handle=%lu\n", 413 sa_idx, xs->xso.offload_handle); 414 return; 415 } 416 417 ixgbevf_ipsec_del_pf_sa(adapter, ipsec->rx_tbl[sa_idx].pfsa); 418 hash_del_rcu(&ipsec->rx_tbl[sa_idx].hlist); 419 memset(&ipsec->rx_tbl[sa_idx], 0, sizeof(struct rx_sa)); 420 ipsec->num_rx_sa--; 421 } else { 422 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX; 423 424 if (!ipsec->tx_tbl[sa_idx].used) { 425 netdev_err(dev, "Invalid Tx SA selected sa_idx=%d offload_handle=%lu\n", 426 sa_idx, xs->xso.offload_handle); 427 return; 428 } 429 430 ixgbevf_ipsec_del_pf_sa(adapter, ipsec->tx_tbl[sa_idx].pfsa); 431 memset(&ipsec->tx_tbl[sa_idx], 0, sizeof(struct tx_sa)); 432 ipsec->num_tx_sa--; 433 } 434 } 435 436 static const struct xfrmdev_ops ixgbevf_xfrmdev_ops = { 437 .xdo_dev_state_add = ixgbevf_ipsec_add_sa, 438 .xdo_dev_state_delete = ixgbevf_ipsec_del_sa, 439 }; 440 441 /** 442 * ixgbevf_ipsec_tx - setup Tx flags for IPsec offload 443 * @tx_ring: outgoing context 444 * @first: current data packet 445 * @itd: ipsec Tx data for later use in building context descriptor 446 **/ 447 int ixgbevf_ipsec_tx(struct ixgbevf_ring *tx_ring, 448 struct ixgbevf_tx_buffer *first, 449 struct ixgbevf_ipsec_tx_data *itd) 450 { 451 struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev); 452 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 453 struct xfrm_state *xs; 454 struct sec_path *sp; 455 struct tx_sa *tsa; 456 u16 sa_idx; 457 458 sp = skb_sec_path(first->skb); 459 if (unlikely(!sp->len)) { 460 netdev_err(tx_ring->netdev, "%s: no xfrm state len = %d\n", 461 __func__, sp->len); 462 return 0; 463 } 464 465 xs = xfrm_input_state(first->skb); 466 if (unlikely(!xs)) { 467 netdev_err(tx_ring->netdev, "%s: no xfrm_input_state() xs = %p\n", 468 __func__, xs); 469 return 0; 470 } 471 472 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX; 473 if (unlikely(sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT)) { 474 netdev_err(tx_ring->netdev, "%s: bad sa_idx=%d handle=%lu\n", 475 __func__, sa_idx, xs->xso.offload_handle); 476 return 0; 477 } 478 479 tsa = &ipsec->tx_tbl[sa_idx]; 480 if (unlikely(!tsa->used)) { 481 netdev_err(tx_ring->netdev, "%s: unused sa_idx=%d\n", 482 __func__, sa_idx); 483 return 0; 484 } 485 486 itd->pfsa = tsa->pfsa - IXGBE_IPSEC_BASE_TX_INDEX; 487 488 first->tx_flags |= IXGBE_TX_FLAGS_IPSEC | IXGBE_TX_FLAGS_CSUM; 489 490 if (xs->id.proto == IPPROTO_ESP) { 491 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_TYPE_ESP | 492 IXGBE_ADVTXD_TUCMD_L4T_TCP; 493 if (first->protocol == htons(ETH_P_IP)) 494 itd->flags |= IXGBE_ADVTXD_TUCMD_IPV4; 495 496 /* The actual trailer length is authlen (16 bytes) plus 497 * 2 bytes for the proto and the padlen values, plus 498 * padlen bytes of padding. This ends up not the same 499 * as the static value found in xs->props.trailer_len (21). 500 * 501 * ... but if we're doing GSO, don't bother as the stack 502 * doesn't add a trailer for those. 503 */ 504 if (!skb_is_gso(first->skb)) { 505 /* The "correct" way to get the auth length would be 506 * to use 507 * authlen = crypto_aead_authsize(xs->data); 508 * but since we know we only have one size to worry 509 * about * we can let the compiler use the constant 510 * and save us a few CPU cycles. 511 */ 512 const int authlen = IXGBE_IPSEC_AUTH_BITS / 8; 513 struct sk_buff *skb = first->skb; 514 u8 padlen; 515 int ret; 516 517 ret = skb_copy_bits(skb, skb->len - (authlen + 2), 518 &padlen, 1); 519 if (unlikely(ret)) 520 return 0; 521 itd->trailer_len = authlen + 2 + padlen; 522 } 523 } 524 if (tsa->encrypt) 525 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_ENCRYPT_EN; 526 527 return 1; 528 } 529 530 /** 531 * ixgbevf_ipsec_rx - decode IPsec bits from Rx descriptor 532 * @rx_ring: receiving ring 533 * @rx_desc: receive data descriptor 534 * @skb: current data packet 535 * 536 * Determine if there was an IPsec encapsulation noticed, and if so set up 537 * the resulting status for later in the receive stack. 538 **/ 539 void ixgbevf_ipsec_rx(struct ixgbevf_ring *rx_ring, 540 union ixgbe_adv_rx_desc *rx_desc, 541 struct sk_buff *skb) 542 { 543 struct ixgbevf_adapter *adapter = netdev_priv(rx_ring->netdev); 544 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; 545 __le16 ipsec_pkt_types = cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH | 546 IXGBE_RXDADV_PKTTYPE_IPSEC_ESP); 547 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 548 struct xfrm_offload *xo = NULL; 549 struct xfrm_state *xs = NULL; 550 struct ipv6hdr *ip6 = NULL; 551 struct iphdr *ip4 = NULL; 552 struct sec_path *sp; 553 void *daddr; 554 __be32 spi; 555 u8 *c_hdr; 556 u8 proto; 557 558 /* Find the IP and crypto headers in the data. 559 * We can assume no VLAN header in the way, b/c the 560 * hw won't recognize the IPsec packet and anyway the 561 * currently VLAN device doesn't support xfrm offload. 562 */ 563 if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV4)) { 564 ip4 = (struct iphdr *)(skb->data + ETH_HLEN); 565 daddr = &ip4->daddr; 566 c_hdr = (u8 *)ip4 + ip4->ihl * 4; 567 } else if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV6)) { 568 ip6 = (struct ipv6hdr *)(skb->data + ETH_HLEN); 569 daddr = &ip6->daddr; 570 c_hdr = (u8 *)ip6 + sizeof(struct ipv6hdr); 571 } else { 572 return; 573 } 574 575 switch (pkt_info & ipsec_pkt_types) { 576 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH): 577 spi = ((struct ip_auth_hdr *)c_hdr)->spi; 578 proto = IPPROTO_AH; 579 break; 580 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_ESP): 581 spi = ((struct ip_esp_hdr *)c_hdr)->spi; 582 proto = IPPROTO_ESP; 583 break; 584 default: 585 return; 586 } 587 588 xs = ixgbevf_ipsec_find_rx_state(ipsec, daddr, proto, spi, !!ip4); 589 if (unlikely(!xs)) 590 return; 591 592 sp = secpath_set(skb); 593 if (unlikely(!sp)) 594 return; 595 596 sp->xvec[sp->len++] = xs; 597 sp->olen++; 598 xo = xfrm_offload(skb); 599 xo->flags = CRYPTO_DONE; 600 xo->status = CRYPTO_SUCCESS; 601 602 adapter->rx_ipsec++; 603 } 604 605 /** 606 * ixgbevf_init_ipsec_offload - initialize registers for IPsec operation 607 * @adapter: board private structure 608 **/ 609 void ixgbevf_init_ipsec_offload(struct ixgbevf_adapter *adapter) 610 { 611 struct ixgbevf_ipsec *ipsec; 612 size_t size; 613 614 switch (adapter->hw.api_version) { 615 case ixgbe_mbox_api_14: 616 break; 617 default: 618 return; 619 } 620 621 ipsec = kzalloc(sizeof(*ipsec), GFP_KERNEL); 622 if (!ipsec) 623 goto err1; 624 hash_init(ipsec->rx_sa_list); 625 626 size = sizeof(struct rx_sa) * IXGBE_IPSEC_MAX_SA_COUNT; 627 ipsec->rx_tbl = kzalloc(size, GFP_KERNEL); 628 if (!ipsec->rx_tbl) 629 goto err2; 630 631 size = sizeof(struct tx_sa) * IXGBE_IPSEC_MAX_SA_COUNT; 632 ipsec->tx_tbl = kzalloc(size, GFP_KERNEL); 633 if (!ipsec->tx_tbl) 634 goto err2; 635 636 ipsec->num_rx_sa = 0; 637 ipsec->num_tx_sa = 0; 638 639 adapter->ipsec = ipsec; 640 641 adapter->netdev->xfrmdev_ops = &ixgbevf_xfrmdev_ops; 642 643 #define IXGBEVF_ESP_FEATURES (NETIF_F_HW_ESP | \ 644 NETIF_F_HW_ESP_TX_CSUM | \ 645 NETIF_F_GSO_ESP) 646 647 adapter->netdev->features |= IXGBEVF_ESP_FEATURES; 648 adapter->netdev->hw_enc_features |= IXGBEVF_ESP_FEATURES; 649 650 return; 651 652 err2: 653 kfree(ipsec->rx_tbl); 654 kfree(ipsec->tx_tbl); 655 kfree(ipsec); 656 err1: 657 netdev_err(adapter->netdev, "Unable to allocate memory for SA tables"); 658 } 659 660 /** 661 * ixgbevf_stop_ipsec_offload - tear down the IPsec offload 662 * @adapter: board private structure 663 **/ 664 void ixgbevf_stop_ipsec_offload(struct ixgbevf_adapter *adapter) 665 { 666 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 667 668 adapter->ipsec = NULL; 669 if (ipsec) { 670 kfree(ipsec->rx_tbl); 671 kfree(ipsec->tx_tbl); 672 kfree(ipsec); 673 } 674 } 675