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.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 **/ 261 static int ixgbevf_ipsec_add_sa(struct xfrm_state *xs) 262 { 263 struct net_device *dev = xs->xso.real_dev; 264 struct ixgbevf_adapter *adapter; 265 struct ixgbevf_ipsec *ipsec; 266 u16 sa_idx; 267 int ret; 268 269 adapter = netdev_priv(dev); 270 ipsec = adapter->ipsec; 271 272 if (xs->id.proto != IPPROTO_ESP && xs->id.proto != IPPROTO_AH) { 273 netdev_err(dev, "Unsupported protocol 0x%04x for IPsec offload\n", 274 xs->id.proto); 275 return -EINVAL; 276 } 277 278 if (xs->props.mode != XFRM_MODE_TRANSPORT) { 279 netdev_err(dev, "Unsupported mode for ipsec offload\n"); 280 return -EINVAL; 281 } 282 283 if (xs->xso.flags & XFRM_OFFLOAD_INBOUND) { 284 struct rx_sa rsa; 285 286 if (xs->calg) { 287 netdev_err(dev, "Compression offload not supported\n"); 288 return -EINVAL; 289 } 290 291 /* find the first unused index */ 292 ret = ixgbevf_ipsec_find_empty_idx(ipsec, true); 293 if (ret < 0) { 294 netdev_err(dev, "No space for SA in Rx table!\n"); 295 return ret; 296 } 297 sa_idx = (u16)ret; 298 299 memset(&rsa, 0, sizeof(rsa)); 300 rsa.used = true; 301 rsa.xs = xs; 302 303 if (rsa.xs->id.proto & IPPROTO_ESP) 304 rsa.decrypt = xs->ealg || xs->aead; 305 306 /* get the key and salt */ 307 ret = ixgbevf_ipsec_parse_proto_keys(xs, rsa.key, &rsa.salt); 308 if (ret) { 309 netdev_err(dev, "Failed to get key data for Rx SA table\n"); 310 return ret; 311 } 312 313 /* get ip for rx sa table */ 314 if (xs->props.family == AF_INET6) 315 memcpy(rsa.ipaddr, &xs->id.daddr.a6, 16); 316 else 317 memcpy(&rsa.ipaddr[3], &xs->id.daddr.a4, 4); 318 319 rsa.mode = IXGBE_RXMOD_VALID; 320 if (rsa.xs->id.proto & IPPROTO_ESP) 321 rsa.mode |= IXGBE_RXMOD_PROTO_ESP; 322 if (rsa.decrypt) 323 rsa.mode |= IXGBE_RXMOD_DECRYPT; 324 if (rsa.xs->props.family == AF_INET6) 325 rsa.mode |= IXGBE_RXMOD_IPV6; 326 327 ret = ixgbevf_ipsec_set_pf_sa(adapter, xs); 328 if (ret < 0) 329 return ret; 330 rsa.pfsa = ret; 331 332 /* the preparations worked, so save the info */ 333 memcpy(&ipsec->rx_tbl[sa_idx], &rsa, sizeof(rsa)); 334 335 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_RX_INDEX; 336 337 ipsec->num_rx_sa++; 338 339 /* hash the new entry for faster search in Rx path */ 340 hash_add_rcu(ipsec->rx_sa_list, &ipsec->rx_tbl[sa_idx].hlist, 341 (__force u32)rsa.xs->id.spi); 342 } else { 343 struct tx_sa tsa; 344 345 /* find the first unused index */ 346 ret = ixgbevf_ipsec_find_empty_idx(ipsec, false); 347 if (ret < 0) { 348 netdev_err(dev, "No space for SA in Tx table\n"); 349 return ret; 350 } 351 sa_idx = (u16)ret; 352 353 memset(&tsa, 0, sizeof(tsa)); 354 tsa.used = true; 355 tsa.xs = xs; 356 357 if (xs->id.proto & IPPROTO_ESP) 358 tsa.encrypt = xs->ealg || xs->aead; 359 360 ret = ixgbevf_ipsec_parse_proto_keys(xs, tsa.key, &tsa.salt); 361 if (ret) { 362 netdev_err(dev, "Failed to get key data for Tx SA table\n"); 363 memset(&tsa, 0, sizeof(tsa)); 364 return ret; 365 } 366 367 ret = ixgbevf_ipsec_set_pf_sa(adapter, xs); 368 if (ret < 0) 369 return ret; 370 tsa.pfsa = ret; 371 372 /* the preparations worked, so save the info */ 373 memcpy(&ipsec->tx_tbl[sa_idx], &tsa, sizeof(tsa)); 374 375 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_TX_INDEX; 376 377 ipsec->num_tx_sa++; 378 } 379 380 return 0; 381 } 382 383 /** 384 * ixgbevf_ipsec_del_sa - clear out this specific SA 385 * @xs: pointer to transformer state struct 386 **/ 387 static void ixgbevf_ipsec_del_sa(struct xfrm_state *xs) 388 { 389 struct net_device *dev = xs->xso.real_dev; 390 struct ixgbevf_adapter *adapter; 391 struct ixgbevf_ipsec *ipsec; 392 u16 sa_idx; 393 394 adapter = netdev_priv(dev); 395 ipsec = adapter->ipsec; 396 397 if (xs->xso.flags & XFRM_OFFLOAD_INBOUND) { 398 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_RX_INDEX; 399 400 if (!ipsec->rx_tbl[sa_idx].used) { 401 netdev_err(dev, "Invalid Rx SA selected sa_idx=%d offload_handle=%lu\n", 402 sa_idx, xs->xso.offload_handle); 403 return; 404 } 405 406 ixgbevf_ipsec_del_pf_sa(adapter, ipsec->rx_tbl[sa_idx].pfsa); 407 hash_del_rcu(&ipsec->rx_tbl[sa_idx].hlist); 408 memset(&ipsec->rx_tbl[sa_idx], 0, sizeof(struct rx_sa)); 409 ipsec->num_rx_sa--; 410 } else { 411 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX; 412 413 if (!ipsec->tx_tbl[sa_idx].used) { 414 netdev_err(dev, "Invalid Tx SA selected sa_idx=%d offload_handle=%lu\n", 415 sa_idx, xs->xso.offload_handle); 416 return; 417 } 418 419 ixgbevf_ipsec_del_pf_sa(adapter, ipsec->tx_tbl[sa_idx].pfsa); 420 memset(&ipsec->tx_tbl[sa_idx], 0, sizeof(struct tx_sa)); 421 ipsec->num_tx_sa--; 422 } 423 } 424 425 /** 426 * ixgbevf_ipsec_offload_ok - can this packet use the xfrm hw offload 427 * @skb: current data packet 428 * @xs: pointer to transformer state struct 429 **/ 430 static bool ixgbevf_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs) 431 { 432 if (xs->props.family == AF_INET) { 433 /* Offload with IPv4 options is not supported yet */ 434 if (ip_hdr(skb)->ihl != 5) 435 return false; 436 } else { 437 /* Offload with IPv6 extension headers is not support yet */ 438 if (ipv6_ext_hdr(ipv6_hdr(skb)->nexthdr)) 439 return false; 440 } 441 442 return true; 443 } 444 445 static const struct xfrmdev_ops ixgbevf_xfrmdev_ops = { 446 .xdo_dev_state_add = ixgbevf_ipsec_add_sa, 447 .xdo_dev_state_delete = ixgbevf_ipsec_del_sa, 448 .xdo_dev_offload_ok = ixgbevf_ipsec_offload_ok, 449 }; 450 451 /** 452 * ixgbevf_ipsec_tx - setup Tx flags for IPsec offload 453 * @tx_ring: outgoing context 454 * @first: current data packet 455 * @itd: ipsec Tx data for later use in building context descriptor 456 **/ 457 int ixgbevf_ipsec_tx(struct ixgbevf_ring *tx_ring, 458 struct ixgbevf_tx_buffer *first, 459 struct ixgbevf_ipsec_tx_data *itd) 460 { 461 struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev); 462 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 463 struct xfrm_state *xs; 464 struct sec_path *sp; 465 struct tx_sa *tsa; 466 u16 sa_idx; 467 468 sp = skb_sec_path(first->skb); 469 if (unlikely(!sp->len)) { 470 netdev_err(tx_ring->netdev, "%s: no xfrm state len = %d\n", 471 __func__, sp->len); 472 return 0; 473 } 474 475 xs = xfrm_input_state(first->skb); 476 if (unlikely(!xs)) { 477 netdev_err(tx_ring->netdev, "%s: no xfrm_input_state() xs = %p\n", 478 __func__, xs); 479 return 0; 480 } 481 482 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX; 483 if (unlikely(sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT)) { 484 netdev_err(tx_ring->netdev, "%s: bad sa_idx=%d handle=%lu\n", 485 __func__, sa_idx, xs->xso.offload_handle); 486 return 0; 487 } 488 489 tsa = &ipsec->tx_tbl[sa_idx]; 490 if (unlikely(!tsa->used)) { 491 netdev_err(tx_ring->netdev, "%s: unused sa_idx=%d\n", 492 __func__, sa_idx); 493 return 0; 494 } 495 496 itd->pfsa = tsa->pfsa - IXGBE_IPSEC_BASE_TX_INDEX; 497 498 first->tx_flags |= IXGBE_TX_FLAGS_IPSEC | IXGBE_TX_FLAGS_CSUM; 499 500 if (xs->id.proto == IPPROTO_ESP) { 501 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_TYPE_ESP | 502 IXGBE_ADVTXD_TUCMD_L4T_TCP; 503 if (first->protocol == htons(ETH_P_IP)) 504 itd->flags |= IXGBE_ADVTXD_TUCMD_IPV4; 505 506 /* The actual trailer length is authlen (16 bytes) plus 507 * 2 bytes for the proto and the padlen values, plus 508 * padlen bytes of padding. This ends up not the same 509 * as the static value found in xs->props.trailer_len (21). 510 * 511 * ... but if we're doing GSO, don't bother as the stack 512 * doesn't add a trailer for those. 513 */ 514 if (!skb_is_gso(first->skb)) { 515 /* The "correct" way to get the auth length would be 516 * to use 517 * authlen = crypto_aead_authsize(xs->data); 518 * but since we know we only have one size to worry 519 * about * we can let the compiler use the constant 520 * and save us a few CPU cycles. 521 */ 522 const int authlen = IXGBE_IPSEC_AUTH_BITS / 8; 523 struct sk_buff *skb = first->skb; 524 u8 padlen; 525 int ret; 526 527 ret = skb_copy_bits(skb, skb->len - (authlen + 2), 528 &padlen, 1); 529 if (unlikely(ret)) 530 return 0; 531 itd->trailer_len = authlen + 2 + padlen; 532 } 533 } 534 if (tsa->encrypt) 535 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_ENCRYPT_EN; 536 537 return 1; 538 } 539 540 /** 541 * ixgbevf_ipsec_rx - decode IPsec bits from Rx descriptor 542 * @rx_ring: receiving ring 543 * @rx_desc: receive data descriptor 544 * @skb: current data packet 545 * 546 * Determine if there was an IPsec encapsulation noticed, and if so set up 547 * the resulting status for later in the receive stack. 548 **/ 549 void ixgbevf_ipsec_rx(struct ixgbevf_ring *rx_ring, 550 union ixgbe_adv_rx_desc *rx_desc, 551 struct sk_buff *skb) 552 { 553 struct ixgbevf_adapter *adapter = netdev_priv(rx_ring->netdev); 554 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; 555 __le16 ipsec_pkt_types = cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH | 556 IXGBE_RXDADV_PKTTYPE_IPSEC_ESP); 557 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 558 struct xfrm_offload *xo = NULL; 559 struct xfrm_state *xs = NULL; 560 struct ipv6hdr *ip6 = NULL; 561 struct iphdr *ip4 = NULL; 562 struct sec_path *sp; 563 void *daddr; 564 __be32 spi; 565 u8 *c_hdr; 566 u8 proto; 567 568 /* Find the IP and crypto headers in the data. 569 * We can assume no VLAN header in the way, b/c the 570 * hw won't recognize the IPsec packet and anyway the 571 * currently VLAN device doesn't support xfrm offload. 572 */ 573 if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV4)) { 574 ip4 = (struct iphdr *)(skb->data + ETH_HLEN); 575 daddr = &ip4->daddr; 576 c_hdr = (u8 *)ip4 + ip4->ihl * 4; 577 } else if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV6)) { 578 ip6 = (struct ipv6hdr *)(skb->data + ETH_HLEN); 579 daddr = &ip6->daddr; 580 c_hdr = (u8 *)ip6 + sizeof(struct ipv6hdr); 581 } else { 582 return; 583 } 584 585 switch (pkt_info & ipsec_pkt_types) { 586 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH): 587 spi = ((struct ip_auth_hdr *)c_hdr)->spi; 588 proto = IPPROTO_AH; 589 break; 590 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_ESP): 591 spi = ((struct ip_esp_hdr *)c_hdr)->spi; 592 proto = IPPROTO_ESP; 593 break; 594 default: 595 return; 596 } 597 598 xs = ixgbevf_ipsec_find_rx_state(ipsec, daddr, proto, spi, !!ip4); 599 if (unlikely(!xs)) 600 return; 601 602 sp = secpath_set(skb); 603 if (unlikely(!sp)) 604 return; 605 606 sp->xvec[sp->len++] = xs; 607 sp->olen++; 608 xo = xfrm_offload(skb); 609 xo->flags = CRYPTO_DONE; 610 xo->status = CRYPTO_SUCCESS; 611 612 adapter->rx_ipsec++; 613 } 614 615 /** 616 * ixgbevf_init_ipsec_offload - initialize registers for IPsec operation 617 * @adapter: board private structure 618 **/ 619 void ixgbevf_init_ipsec_offload(struct ixgbevf_adapter *adapter) 620 { 621 struct ixgbevf_ipsec *ipsec; 622 size_t size; 623 624 switch (adapter->hw.api_version) { 625 case ixgbe_mbox_api_14: 626 break; 627 default: 628 return; 629 } 630 631 ipsec = kzalloc(sizeof(*ipsec), GFP_KERNEL); 632 if (!ipsec) 633 goto err1; 634 hash_init(ipsec->rx_sa_list); 635 636 size = sizeof(struct rx_sa) * IXGBE_IPSEC_MAX_SA_COUNT; 637 ipsec->rx_tbl = kzalloc(size, GFP_KERNEL); 638 if (!ipsec->rx_tbl) 639 goto err2; 640 641 size = sizeof(struct tx_sa) * IXGBE_IPSEC_MAX_SA_COUNT; 642 ipsec->tx_tbl = kzalloc(size, GFP_KERNEL); 643 if (!ipsec->tx_tbl) 644 goto err2; 645 646 ipsec->num_rx_sa = 0; 647 ipsec->num_tx_sa = 0; 648 649 adapter->ipsec = ipsec; 650 651 adapter->netdev->xfrmdev_ops = &ixgbevf_xfrmdev_ops; 652 653 #define IXGBEVF_ESP_FEATURES (NETIF_F_HW_ESP | \ 654 NETIF_F_HW_ESP_TX_CSUM | \ 655 NETIF_F_GSO_ESP) 656 657 adapter->netdev->features |= IXGBEVF_ESP_FEATURES; 658 adapter->netdev->hw_enc_features |= IXGBEVF_ESP_FEATURES; 659 660 return; 661 662 err2: 663 kfree(ipsec->rx_tbl); 664 kfree(ipsec->tx_tbl); 665 kfree(ipsec); 666 err1: 667 netdev_err(adapter->netdev, "Unable to allocate memory for SA tables"); 668 } 669 670 /** 671 * ixgbevf_stop_ipsec_offload - tear down the IPsec offload 672 * @adapter: board private structure 673 **/ 674 void ixgbevf_stop_ipsec_offload(struct ixgbevf_adapter *adapter) 675 { 676 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 677 678 adapter->ipsec = NULL; 679 if (ipsec) { 680 kfree(ipsec->rx_tbl); 681 kfree(ipsec->tx_tbl); 682 kfree(ipsec); 683 } 684 } 685