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->flags = xs->xso.flags; 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 = hw->mbx.ops.write_posted(hw, msgbuf, IXGBE_VFMAILBOX_SIZE); 44 if (ret) 45 goto out; 46 47 ret = hw->mbx.ops.read_posted(hw, msgbuf, 2); 48 if (ret) 49 goto out; 50 51 ret = (int)msgbuf[1]; 52 if (msgbuf[0] & IXGBE_VT_MSGTYPE_NACK && 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 = hw->mbx.ops.write_posted(hw, msgbuf, 2); 81 if (err) 82 goto out; 83 84 err = hw->mbx.ops.read_posted(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 * @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 **/ 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.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 **/ 261 static int ixgbevf_ipsec_add_sa(struct xfrm_state *xs) 262 { 263 struct net_device *dev = xs->xso.dev; 264 struct ixgbevf_adapter *adapter = netdev_priv(dev); 265 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 266 u16 sa_idx; 267 int ret; 268 269 if (xs->id.proto != IPPROTO_ESP && xs->id.proto != IPPROTO_AH) { 270 netdev_err(dev, "Unsupported protocol 0x%04x for IPsec offload\n", 271 xs->id.proto); 272 return -EINVAL; 273 } 274 275 if (xs->xso.flags & XFRM_OFFLOAD_INBOUND) { 276 struct rx_sa rsa; 277 278 if (xs->calg) { 279 netdev_err(dev, "Compression offload not supported\n"); 280 return -EINVAL; 281 } 282 283 /* find the first unused index */ 284 ret = ixgbevf_ipsec_find_empty_idx(ipsec, true); 285 if (ret < 0) { 286 netdev_err(dev, "No space for SA in Rx table!\n"); 287 return ret; 288 } 289 sa_idx = (u16)ret; 290 291 memset(&rsa, 0, sizeof(rsa)); 292 rsa.used = true; 293 rsa.xs = xs; 294 295 if (rsa.xs->id.proto & IPPROTO_ESP) 296 rsa.decrypt = xs->ealg || xs->aead; 297 298 /* get the key and salt */ 299 ret = ixgbevf_ipsec_parse_proto_keys(xs, rsa.key, &rsa.salt); 300 if (ret) { 301 netdev_err(dev, "Failed to get key data for Rx SA table\n"); 302 return ret; 303 } 304 305 /* get ip for rx sa table */ 306 if (xs->props.family == AF_INET6) 307 memcpy(rsa.ipaddr, &xs->id.daddr.a6, 16); 308 else 309 memcpy(&rsa.ipaddr[3], &xs->id.daddr.a4, 4); 310 311 rsa.mode = IXGBE_RXMOD_VALID; 312 if (rsa.xs->id.proto & IPPROTO_ESP) 313 rsa.mode |= IXGBE_RXMOD_PROTO_ESP; 314 if (rsa.decrypt) 315 rsa.mode |= IXGBE_RXMOD_DECRYPT; 316 if (rsa.xs->props.family == AF_INET6) 317 rsa.mode |= IXGBE_RXMOD_IPV6; 318 319 ret = ixgbevf_ipsec_set_pf_sa(adapter, xs); 320 if (ret < 0) 321 return ret; 322 rsa.pfsa = ret; 323 324 /* the preparations worked, so save the info */ 325 memcpy(&ipsec->rx_tbl[sa_idx], &rsa, sizeof(rsa)); 326 327 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_RX_INDEX; 328 329 ipsec->num_rx_sa++; 330 331 /* hash the new entry for faster search in Rx path */ 332 hash_add_rcu(ipsec->rx_sa_list, &ipsec->rx_tbl[sa_idx].hlist, 333 (__force u32)rsa.xs->id.spi); 334 } else { 335 struct tx_sa tsa; 336 337 /* find the first unused index */ 338 ret = ixgbevf_ipsec_find_empty_idx(ipsec, false); 339 if (ret < 0) { 340 netdev_err(dev, "No space for SA in Tx table\n"); 341 return ret; 342 } 343 sa_idx = (u16)ret; 344 345 memset(&tsa, 0, sizeof(tsa)); 346 tsa.used = true; 347 tsa.xs = xs; 348 349 if (xs->id.proto & IPPROTO_ESP) 350 tsa.encrypt = xs->ealg || xs->aead; 351 352 ret = ixgbevf_ipsec_parse_proto_keys(xs, tsa.key, &tsa.salt); 353 if (ret) { 354 netdev_err(dev, "Failed to get key data for Tx SA table\n"); 355 memset(&tsa, 0, sizeof(tsa)); 356 return ret; 357 } 358 359 ret = ixgbevf_ipsec_set_pf_sa(adapter, xs); 360 if (ret < 0) 361 return ret; 362 tsa.pfsa = ret; 363 364 /* the preparations worked, so save the info */ 365 memcpy(&ipsec->tx_tbl[sa_idx], &tsa, sizeof(tsa)); 366 367 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_TX_INDEX; 368 369 ipsec->num_tx_sa++; 370 } 371 372 return 0; 373 } 374 375 /** 376 * ixgbevf_ipsec_del_sa - clear out this specific SA 377 * @xs: pointer to transformer state struct 378 **/ 379 static void ixgbevf_ipsec_del_sa(struct xfrm_state *xs) 380 { 381 struct net_device *dev = xs->xso.dev; 382 struct ixgbevf_adapter *adapter = netdev_priv(dev); 383 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 384 u16 sa_idx; 385 386 if (xs->xso.flags & XFRM_OFFLOAD_INBOUND) { 387 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_RX_INDEX; 388 389 if (!ipsec->rx_tbl[sa_idx].used) { 390 netdev_err(dev, "Invalid Rx SA selected sa_idx=%d offload_handle=%lu\n", 391 sa_idx, xs->xso.offload_handle); 392 return; 393 } 394 395 ixgbevf_ipsec_del_pf_sa(adapter, ipsec->rx_tbl[sa_idx].pfsa); 396 hash_del_rcu(&ipsec->rx_tbl[sa_idx].hlist); 397 memset(&ipsec->rx_tbl[sa_idx], 0, sizeof(struct rx_sa)); 398 ipsec->num_rx_sa--; 399 } else { 400 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX; 401 402 if (!ipsec->tx_tbl[sa_idx].used) { 403 netdev_err(dev, "Invalid Tx SA selected sa_idx=%d offload_handle=%lu\n", 404 sa_idx, xs->xso.offload_handle); 405 return; 406 } 407 408 ixgbevf_ipsec_del_pf_sa(adapter, ipsec->tx_tbl[sa_idx].pfsa); 409 memset(&ipsec->tx_tbl[sa_idx], 0, sizeof(struct tx_sa)); 410 ipsec->num_tx_sa--; 411 } 412 } 413 414 /** 415 * ixgbevf_ipsec_offload_ok - can this packet use the xfrm hw offload 416 * @skb: current data packet 417 * @xs: pointer to transformer state struct 418 **/ 419 static bool ixgbevf_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs) 420 { 421 if (xs->props.family == AF_INET) { 422 /* Offload with IPv4 options is not supported yet */ 423 if (ip_hdr(skb)->ihl != 5) 424 return false; 425 } else { 426 /* Offload with IPv6 extension headers is not support yet */ 427 if (ipv6_ext_hdr(ipv6_hdr(skb)->nexthdr)) 428 return false; 429 } 430 431 return true; 432 } 433 434 static const struct xfrmdev_ops ixgbevf_xfrmdev_ops = { 435 .xdo_dev_state_add = ixgbevf_ipsec_add_sa, 436 .xdo_dev_state_delete = ixgbevf_ipsec_del_sa, 437 .xdo_dev_offload_ok = ixgbevf_ipsec_offload_ok, 438 }; 439 440 /** 441 * ixgbevf_ipsec_tx - setup Tx flags for IPsec offload 442 * @tx_ring: outgoing context 443 * @first: current data packet 444 * @itd: ipsec Tx data for later use in building context descriptor 445 **/ 446 int ixgbevf_ipsec_tx(struct ixgbevf_ring *tx_ring, 447 struct ixgbevf_tx_buffer *first, 448 struct ixgbevf_ipsec_tx_data *itd) 449 { 450 struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev); 451 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 452 struct xfrm_state *xs; 453 struct sec_path *sp; 454 struct tx_sa *tsa; 455 u16 sa_idx; 456 457 sp = skb_sec_path(first->skb); 458 if (unlikely(!sp->len)) { 459 netdev_err(tx_ring->netdev, "%s: no xfrm state len = %d\n", 460 __func__, sp->len); 461 return 0; 462 } 463 464 xs = xfrm_input_state(first->skb); 465 if (unlikely(!xs)) { 466 netdev_err(tx_ring->netdev, "%s: no xfrm_input_state() xs = %p\n", 467 __func__, xs); 468 return 0; 469 } 470 471 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX; 472 if (unlikely(sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT)) { 473 netdev_err(tx_ring->netdev, "%s: bad sa_idx=%d handle=%lu\n", 474 __func__, sa_idx, xs->xso.offload_handle); 475 return 0; 476 } 477 478 tsa = &ipsec->tx_tbl[sa_idx]; 479 if (unlikely(!tsa->used)) { 480 netdev_err(tx_ring->netdev, "%s: unused sa_idx=%d\n", 481 __func__, sa_idx); 482 return 0; 483 } 484 485 itd->pfsa = tsa->pfsa - IXGBE_IPSEC_BASE_TX_INDEX; 486 487 first->tx_flags |= IXGBE_TX_FLAGS_IPSEC | IXGBE_TX_FLAGS_CSUM; 488 489 if (xs->id.proto == IPPROTO_ESP) { 490 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_TYPE_ESP | 491 IXGBE_ADVTXD_TUCMD_L4T_TCP; 492 if (first->protocol == htons(ETH_P_IP)) 493 itd->flags |= IXGBE_ADVTXD_TUCMD_IPV4; 494 495 /* The actual trailer length is authlen (16 bytes) plus 496 * 2 bytes for the proto and the padlen values, plus 497 * padlen bytes of padding. This ends up not the same 498 * as the static value found in xs->props.trailer_len (21). 499 * 500 * ... but if we're doing GSO, don't bother as the stack 501 * doesn't add a trailer for those. 502 */ 503 if (!skb_is_gso(first->skb)) { 504 /* The "correct" way to get the auth length would be 505 * to use 506 * authlen = crypto_aead_authsize(xs->data); 507 * but since we know we only have one size to worry 508 * about * we can let the compiler use the constant 509 * and save us a few CPU cycles. 510 */ 511 const int authlen = IXGBE_IPSEC_AUTH_BITS / 8; 512 struct sk_buff *skb = first->skb; 513 u8 padlen; 514 int ret; 515 516 ret = skb_copy_bits(skb, skb->len - (authlen + 2), 517 &padlen, 1); 518 if (unlikely(ret)) 519 return 0; 520 itd->trailer_len = authlen + 2 + padlen; 521 } 522 } 523 if (tsa->encrypt) 524 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_ENCRYPT_EN; 525 526 return 1; 527 } 528 529 /** 530 * ixgbevf_ipsec_rx - decode IPsec bits from Rx descriptor 531 * @rx_ring: receiving ring 532 * @rx_desc: receive data descriptor 533 * @skb: current data packet 534 * 535 * Determine if there was an IPsec encapsulation noticed, and if so set up 536 * the resulting status for later in the receive stack. 537 **/ 538 void ixgbevf_ipsec_rx(struct ixgbevf_ring *rx_ring, 539 union ixgbe_adv_rx_desc *rx_desc, 540 struct sk_buff *skb) 541 { 542 struct ixgbevf_adapter *adapter = netdev_priv(rx_ring->netdev); 543 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; 544 __le16 ipsec_pkt_types = cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH | 545 IXGBE_RXDADV_PKTTYPE_IPSEC_ESP); 546 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 547 struct xfrm_offload *xo = NULL; 548 struct xfrm_state *xs = NULL; 549 struct ipv6hdr *ip6 = NULL; 550 struct iphdr *ip4 = NULL; 551 struct sec_path *sp; 552 void *daddr; 553 __be32 spi; 554 u8 *c_hdr; 555 u8 proto; 556 557 /* Find the IP and crypto headers in the data. 558 * We can assume no VLAN header in the way, b/c the 559 * hw won't recognize the IPsec packet and anyway the 560 * currently VLAN device doesn't support xfrm offload. 561 */ 562 if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV4)) { 563 ip4 = (struct iphdr *)(skb->data + ETH_HLEN); 564 daddr = &ip4->daddr; 565 c_hdr = (u8 *)ip4 + ip4->ihl * 4; 566 } else if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV6)) { 567 ip6 = (struct ipv6hdr *)(skb->data + ETH_HLEN); 568 daddr = &ip6->daddr; 569 c_hdr = (u8 *)ip6 + sizeof(struct ipv6hdr); 570 } else { 571 return; 572 } 573 574 switch (pkt_info & ipsec_pkt_types) { 575 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH): 576 spi = ((struct ip_auth_hdr *)c_hdr)->spi; 577 proto = IPPROTO_AH; 578 break; 579 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_ESP): 580 spi = ((struct ip_esp_hdr *)c_hdr)->spi; 581 proto = IPPROTO_ESP; 582 break; 583 default: 584 return; 585 } 586 587 xs = ixgbevf_ipsec_find_rx_state(ipsec, daddr, proto, spi, !!ip4); 588 if (unlikely(!xs)) 589 return; 590 591 sp = secpath_set(skb); 592 if (unlikely(!sp)) 593 return; 594 595 sp->xvec[sp->len++] = xs; 596 sp->olen++; 597 xo = xfrm_offload(skb); 598 xo->flags = CRYPTO_DONE; 599 xo->status = CRYPTO_SUCCESS; 600 601 adapter->rx_ipsec++; 602 } 603 604 /** 605 * ixgbevf_init_ipsec_offload - initialize registers for IPsec operation 606 * @adapter: board private structure 607 **/ 608 void ixgbevf_init_ipsec_offload(struct ixgbevf_adapter *adapter) 609 { 610 struct ixgbevf_ipsec *ipsec; 611 size_t size; 612 613 switch (adapter->hw.api_version) { 614 case ixgbe_mbox_api_14: 615 break; 616 default: 617 return; 618 } 619 620 ipsec = kzalloc(sizeof(*ipsec), GFP_KERNEL); 621 if (!ipsec) 622 goto err1; 623 hash_init(ipsec->rx_sa_list); 624 625 size = sizeof(struct rx_sa) * IXGBE_IPSEC_MAX_SA_COUNT; 626 ipsec->rx_tbl = kzalloc(size, GFP_KERNEL); 627 if (!ipsec->rx_tbl) 628 goto err2; 629 630 size = sizeof(struct tx_sa) * IXGBE_IPSEC_MAX_SA_COUNT; 631 ipsec->tx_tbl = kzalloc(size, GFP_KERNEL); 632 if (!ipsec->tx_tbl) 633 goto err2; 634 635 ipsec->num_rx_sa = 0; 636 ipsec->num_tx_sa = 0; 637 638 adapter->ipsec = ipsec; 639 640 adapter->netdev->xfrmdev_ops = &ixgbevf_xfrmdev_ops; 641 642 #define IXGBEVF_ESP_FEATURES (NETIF_F_HW_ESP | \ 643 NETIF_F_HW_ESP_TX_CSUM | \ 644 NETIF_F_GSO_ESP) 645 646 adapter->netdev->features |= IXGBEVF_ESP_FEATURES; 647 adapter->netdev->hw_enc_features |= IXGBEVF_ESP_FEATURES; 648 649 return; 650 651 err2: 652 kfree(ipsec->rx_tbl); 653 kfree(ipsec->tx_tbl); 654 kfree(ipsec); 655 err1: 656 netdev_err(adapter->netdev, "Unable to allocate memory for SA tables"); 657 } 658 659 /** 660 * ixgbevf_stop_ipsec_offload - tear down the IPsec offload 661 * @adapter: board private structure 662 **/ 663 void ixgbevf_stop_ipsec_offload(struct ixgbevf_adapter *adapter) 664 { 665 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 666 667 adapter->ipsec = NULL; 668 if (ipsec) { 669 kfree(ipsec->rx_tbl); 670 kfree(ipsec->tx_tbl); 671 kfree(ipsec); 672 } 673 } 674