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 * @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 * @extack: extack point to fill failure reason 261 **/ 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 **/ 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 /** 432 * ixgbevf_ipsec_offload_ok - can this packet use the xfrm hw offload 433 * @skb: current data packet 434 * @xs: pointer to transformer state struct 435 **/ 436 static 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 } 450 451 static 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 offload 459 * @tx_ring: outgoing context 460 * @first: current data packet 461 * @itd: ipsec Tx data for later use in building context descriptor 462 **/ 463 int 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) plus 513 * 2 bytes for the proto and the padlen values, plus 514 * padlen bytes of padding. This ends up not the same 515 * as the static value found in xs->props.trailer_len (21). 516 * 517 * ... but if we're doing GSO, don't bother as the stack 518 * 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 be 522 * to use 523 * authlen = crypto_aead_authsize(xs->data); 524 * but since we know we only have one size to worry 525 * about * we can let the compiler use the constant 526 * 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 descriptor 548 * @rx_ring: receiving ring 549 * @rx_desc: receive data descriptor 550 * @skb: current data packet 551 * 552 * Determine if there was an IPsec encapsulation noticed, and if so set up 553 * the resulting status for later in the receive stack. 554 **/ 555 void 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 the 576 * hw won't recognize the IPsec packet and anyway the 577 * 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 operation 623 * @adapter: board private structure 624 **/ 625 void 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; 668 669 err2: 670 kfree(ipsec->rx_tbl); 671 kfree(ipsec->tx_tbl); 672 kfree(ipsec); 673 err1: 674 netdev_err(adapter->netdev, "Unable to allocate memory for SA tables"); 675 } 676 677 /** 678 * ixgbevf_stop_ipsec_offload - tear down the IPsec offload 679 * @adapter: board private structure 680 **/ 681 void 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