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 **/ 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.type != XFRM_DEV_OFFLOAD_CRYPTO) { 284 netdev_err(dev, "Unsupported ipsec offload type\n"); 285 return -EINVAL; 286 } 287 288 if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) { 289 struct rx_sa rsa; 290 291 if (xs->calg) { 292 netdev_err(dev, "Compression offload not supported\n"); 293 return -EINVAL; 294 } 295 296 /* find the first unused index */ 297 ret = ixgbevf_ipsec_find_empty_idx(ipsec, true); 298 if (ret < 0) { 299 netdev_err(dev, "No space for SA in Rx table!\n"); 300 return ret; 301 } 302 sa_idx = (u16)ret; 303 304 memset(&rsa, 0, sizeof(rsa)); 305 rsa.used = true; 306 rsa.xs = xs; 307 308 if (rsa.xs->id.proto & IPPROTO_ESP) 309 rsa.decrypt = xs->ealg || xs->aead; 310 311 /* get the key and salt */ 312 ret = ixgbevf_ipsec_parse_proto_keys(xs, rsa.key, &rsa.salt); 313 if (ret) { 314 netdev_err(dev, "Failed to get key data for Rx SA table\n"); 315 return ret; 316 } 317 318 /* get ip for rx sa table */ 319 if (xs->props.family == AF_INET6) 320 memcpy(rsa.ipaddr, &xs->id.daddr.a6, 16); 321 else 322 memcpy(&rsa.ipaddr[3], &xs->id.daddr.a4, 4); 323 324 rsa.mode = IXGBE_RXMOD_VALID; 325 if (rsa.xs->id.proto & IPPROTO_ESP) 326 rsa.mode |= IXGBE_RXMOD_PROTO_ESP; 327 if (rsa.decrypt) 328 rsa.mode |= IXGBE_RXMOD_DECRYPT; 329 if (rsa.xs->props.family == AF_INET6) 330 rsa.mode |= IXGBE_RXMOD_IPV6; 331 332 ret = ixgbevf_ipsec_set_pf_sa(adapter, xs); 333 if (ret < 0) 334 return ret; 335 rsa.pfsa = ret; 336 337 /* the preparations worked, so save the info */ 338 memcpy(&ipsec->rx_tbl[sa_idx], &rsa, sizeof(rsa)); 339 340 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_RX_INDEX; 341 342 ipsec->num_rx_sa++; 343 344 /* hash the new entry for faster search in Rx path */ 345 hash_add_rcu(ipsec->rx_sa_list, &ipsec->rx_tbl[sa_idx].hlist, 346 (__force u32)rsa.xs->id.spi); 347 } else { 348 struct tx_sa tsa; 349 350 /* find the first unused index */ 351 ret = ixgbevf_ipsec_find_empty_idx(ipsec, false); 352 if (ret < 0) { 353 netdev_err(dev, "No space for SA in Tx table\n"); 354 return ret; 355 } 356 sa_idx = (u16)ret; 357 358 memset(&tsa, 0, sizeof(tsa)); 359 tsa.used = true; 360 tsa.xs = xs; 361 362 if (xs->id.proto & IPPROTO_ESP) 363 tsa.encrypt = xs->ealg || xs->aead; 364 365 ret = ixgbevf_ipsec_parse_proto_keys(xs, tsa.key, &tsa.salt); 366 if (ret) { 367 netdev_err(dev, "Failed to get key data for Tx SA table\n"); 368 memset(&tsa, 0, sizeof(tsa)); 369 return ret; 370 } 371 372 ret = ixgbevf_ipsec_set_pf_sa(adapter, xs); 373 if (ret < 0) 374 return ret; 375 tsa.pfsa = ret; 376 377 /* the preparations worked, so save the info */ 378 memcpy(&ipsec->tx_tbl[sa_idx], &tsa, sizeof(tsa)); 379 380 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_TX_INDEX; 381 382 ipsec->num_tx_sa++; 383 } 384 385 return 0; 386 } 387 388 /** 389 * ixgbevf_ipsec_del_sa - clear out this specific SA 390 * @xs: pointer to transformer state struct 391 **/ 392 static void ixgbevf_ipsec_del_sa(struct xfrm_state *xs) 393 { 394 struct net_device *dev = xs->xso.real_dev; 395 struct ixgbevf_adapter *adapter; 396 struct ixgbevf_ipsec *ipsec; 397 u16 sa_idx; 398 399 adapter = netdev_priv(dev); 400 ipsec = adapter->ipsec; 401 402 if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) { 403 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_RX_INDEX; 404 405 if (!ipsec->rx_tbl[sa_idx].used) { 406 netdev_err(dev, "Invalid Rx SA selected sa_idx=%d offload_handle=%lu\n", 407 sa_idx, xs->xso.offload_handle); 408 return; 409 } 410 411 ixgbevf_ipsec_del_pf_sa(adapter, ipsec->rx_tbl[sa_idx].pfsa); 412 hash_del_rcu(&ipsec->rx_tbl[sa_idx].hlist); 413 memset(&ipsec->rx_tbl[sa_idx], 0, sizeof(struct rx_sa)); 414 ipsec->num_rx_sa--; 415 } else { 416 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX; 417 418 if (!ipsec->tx_tbl[sa_idx].used) { 419 netdev_err(dev, "Invalid Tx SA selected sa_idx=%d offload_handle=%lu\n", 420 sa_idx, xs->xso.offload_handle); 421 return; 422 } 423 424 ixgbevf_ipsec_del_pf_sa(adapter, ipsec->tx_tbl[sa_idx].pfsa); 425 memset(&ipsec->tx_tbl[sa_idx], 0, sizeof(struct tx_sa)); 426 ipsec->num_tx_sa--; 427 } 428 } 429 430 /** 431 * ixgbevf_ipsec_offload_ok - can this packet use the xfrm hw offload 432 * @skb: current data packet 433 * @xs: pointer to transformer state struct 434 **/ 435 static bool ixgbevf_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs) 436 { 437 if (xs->props.family == AF_INET) { 438 /* Offload with IPv4 options is not supported yet */ 439 if (ip_hdr(skb)->ihl != 5) 440 return false; 441 } else { 442 /* Offload with IPv6 extension headers is not support yet */ 443 if (ipv6_ext_hdr(ipv6_hdr(skb)->nexthdr)) 444 return false; 445 } 446 447 return true; 448 } 449 450 static const struct xfrmdev_ops ixgbevf_xfrmdev_ops = { 451 .xdo_dev_state_add = ixgbevf_ipsec_add_sa, 452 .xdo_dev_state_delete = ixgbevf_ipsec_del_sa, 453 .xdo_dev_offload_ok = ixgbevf_ipsec_offload_ok, 454 }; 455 456 /** 457 * ixgbevf_ipsec_tx - setup Tx flags for IPsec offload 458 * @tx_ring: outgoing context 459 * @first: current data packet 460 * @itd: ipsec Tx data for later use in building context descriptor 461 **/ 462 int ixgbevf_ipsec_tx(struct ixgbevf_ring *tx_ring, 463 struct ixgbevf_tx_buffer *first, 464 struct ixgbevf_ipsec_tx_data *itd) 465 { 466 struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev); 467 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 468 struct xfrm_state *xs; 469 struct sec_path *sp; 470 struct tx_sa *tsa; 471 u16 sa_idx; 472 473 sp = skb_sec_path(first->skb); 474 if (unlikely(!sp->len)) { 475 netdev_err(tx_ring->netdev, "%s: no xfrm state len = %d\n", 476 __func__, sp->len); 477 return 0; 478 } 479 480 xs = xfrm_input_state(first->skb); 481 if (unlikely(!xs)) { 482 netdev_err(tx_ring->netdev, "%s: no xfrm_input_state() xs = %p\n", 483 __func__, xs); 484 return 0; 485 } 486 487 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX; 488 if (unlikely(sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT)) { 489 netdev_err(tx_ring->netdev, "%s: bad sa_idx=%d handle=%lu\n", 490 __func__, sa_idx, xs->xso.offload_handle); 491 return 0; 492 } 493 494 tsa = &ipsec->tx_tbl[sa_idx]; 495 if (unlikely(!tsa->used)) { 496 netdev_err(tx_ring->netdev, "%s: unused sa_idx=%d\n", 497 __func__, sa_idx); 498 return 0; 499 } 500 501 itd->pfsa = tsa->pfsa - IXGBE_IPSEC_BASE_TX_INDEX; 502 503 first->tx_flags |= IXGBE_TX_FLAGS_IPSEC | IXGBE_TX_FLAGS_CSUM; 504 505 if (xs->id.proto == IPPROTO_ESP) { 506 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_TYPE_ESP | 507 IXGBE_ADVTXD_TUCMD_L4T_TCP; 508 if (first->protocol == htons(ETH_P_IP)) 509 itd->flags |= IXGBE_ADVTXD_TUCMD_IPV4; 510 511 /* The actual trailer length is authlen (16 bytes) plus 512 * 2 bytes for the proto and the padlen values, plus 513 * padlen bytes of padding. This ends up not the same 514 * as the static value found in xs->props.trailer_len (21). 515 * 516 * ... but if we're doing GSO, don't bother as the stack 517 * doesn't add a trailer for those. 518 */ 519 if (!skb_is_gso(first->skb)) { 520 /* The "correct" way to get the auth length would be 521 * to use 522 * authlen = crypto_aead_authsize(xs->data); 523 * but since we know we only have one size to worry 524 * about * we can let the compiler use the constant 525 * and save us a few CPU cycles. 526 */ 527 const int authlen = IXGBE_IPSEC_AUTH_BITS / 8; 528 struct sk_buff *skb = first->skb; 529 u8 padlen; 530 int ret; 531 532 ret = skb_copy_bits(skb, skb->len - (authlen + 2), 533 &padlen, 1); 534 if (unlikely(ret)) 535 return 0; 536 itd->trailer_len = authlen + 2 + padlen; 537 } 538 } 539 if (tsa->encrypt) 540 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_ENCRYPT_EN; 541 542 return 1; 543 } 544 545 /** 546 * ixgbevf_ipsec_rx - decode IPsec bits from Rx descriptor 547 * @rx_ring: receiving ring 548 * @rx_desc: receive data descriptor 549 * @skb: current data packet 550 * 551 * Determine if there was an IPsec encapsulation noticed, and if so set up 552 * the resulting status for later in the receive stack. 553 **/ 554 void ixgbevf_ipsec_rx(struct ixgbevf_ring *rx_ring, 555 union ixgbe_adv_rx_desc *rx_desc, 556 struct sk_buff *skb) 557 { 558 struct ixgbevf_adapter *adapter = netdev_priv(rx_ring->netdev); 559 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; 560 __le16 ipsec_pkt_types = cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH | 561 IXGBE_RXDADV_PKTTYPE_IPSEC_ESP); 562 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 563 struct xfrm_offload *xo = NULL; 564 struct xfrm_state *xs = NULL; 565 struct ipv6hdr *ip6 = NULL; 566 struct iphdr *ip4 = NULL; 567 struct sec_path *sp; 568 void *daddr; 569 __be32 spi; 570 u8 *c_hdr; 571 u8 proto; 572 573 /* Find the IP and crypto headers in the data. 574 * We can assume no VLAN header in the way, b/c the 575 * hw won't recognize the IPsec packet and anyway the 576 * currently VLAN device doesn't support xfrm offload. 577 */ 578 if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV4)) { 579 ip4 = (struct iphdr *)(skb->data + ETH_HLEN); 580 daddr = &ip4->daddr; 581 c_hdr = (u8 *)ip4 + ip4->ihl * 4; 582 } else if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV6)) { 583 ip6 = (struct ipv6hdr *)(skb->data + ETH_HLEN); 584 daddr = &ip6->daddr; 585 c_hdr = (u8 *)ip6 + sizeof(struct ipv6hdr); 586 } else { 587 return; 588 } 589 590 switch (pkt_info & ipsec_pkt_types) { 591 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH): 592 spi = ((struct ip_auth_hdr *)c_hdr)->spi; 593 proto = IPPROTO_AH; 594 break; 595 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_ESP): 596 spi = ((struct ip_esp_hdr *)c_hdr)->spi; 597 proto = IPPROTO_ESP; 598 break; 599 default: 600 return; 601 } 602 603 xs = ixgbevf_ipsec_find_rx_state(ipsec, daddr, proto, spi, !!ip4); 604 if (unlikely(!xs)) 605 return; 606 607 sp = secpath_set(skb); 608 if (unlikely(!sp)) 609 return; 610 611 sp->xvec[sp->len++] = xs; 612 sp->olen++; 613 xo = xfrm_offload(skb); 614 xo->flags = CRYPTO_DONE; 615 xo->status = CRYPTO_SUCCESS; 616 617 adapter->rx_ipsec++; 618 } 619 620 /** 621 * ixgbevf_init_ipsec_offload - initialize registers for IPsec operation 622 * @adapter: board private structure 623 **/ 624 void ixgbevf_init_ipsec_offload(struct ixgbevf_adapter *adapter) 625 { 626 struct ixgbevf_ipsec *ipsec; 627 size_t size; 628 629 switch (adapter->hw.api_version) { 630 case ixgbe_mbox_api_14: 631 case ixgbe_mbox_api_15: 632 break; 633 default: 634 return; 635 } 636 637 ipsec = kzalloc(sizeof(*ipsec), GFP_KERNEL); 638 if (!ipsec) 639 goto err1; 640 hash_init(ipsec->rx_sa_list); 641 642 size = sizeof(struct rx_sa) * IXGBE_IPSEC_MAX_SA_COUNT; 643 ipsec->rx_tbl = kzalloc(size, GFP_KERNEL); 644 if (!ipsec->rx_tbl) 645 goto err2; 646 647 size = sizeof(struct tx_sa) * IXGBE_IPSEC_MAX_SA_COUNT; 648 ipsec->tx_tbl = kzalloc(size, GFP_KERNEL); 649 if (!ipsec->tx_tbl) 650 goto err2; 651 652 ipsec->num_rx_sa = 0; 653 ipsec->num_tx_sa = 0; 654 655 adapter->ipsec = ipsec; 656 657 adapter->netdev->xfrmdev_ops = &ixgbevf_xfrmdev_ops; 658 659 #define IXGBEVF_ESP_FEATURES (NETIF_F_HW_ESP | \ 660 NETIF_F_HW_ESP_TX_CSUM | \ 661 NETIF_F_GSO_ESP) 662 663 adapter->netdev->features |= IXGBEVF_ESP_FEATURES; 664 adapter->netdev->hw_enc_features |= IXGBEVF_ESP_FEATURES; 665 666 return; 667 668 err2: 669 kfree(ipsec->rx_tbl); 670 kfree(ipsec->tx_tbl); 671 kfree(ipsec); 672 err1: 673 netdev_err(adapter->netdev, "Unable to allocate memory for SA tables"); 674 } 675 676 /** 677 * ixgbevf_stop_ipsec_offload - tear down the IPsec offload 678 * @adapter: board private structure 679 **/ 680 void ixgbevf_stop_ipsec_offload(struct ixgbevf_adapter *adapter) 681 { 682 struct ixgbevf_ipsec *ipsec = adapter->ipsec; 683 684 adapter->ipsec = NULL; 685 if (ipsec) { 686 kfree(ipsec->rx_tbl); 687 kfree(ipsec->tx_tbl); 688 kfree(ipsec); 689 } 690 } 691