1308 lines · c
1// SPDX-License-Identifier: GPL-2.02/* Copyright(c) 2017 Oracle and/or its affiliates. All rights reserved. */3 4#include "ixgbe.h"5#include <net/xfrm.h>6#include <crypto/aead.h>7#include <linux/if_bridge.h>8 9#define IXGBE_IPSEC_KEY_BITS 16010static const char aes_gcm_name[] = "rfc4106(gcm(aes))";11 12static void ixgbe_ipsec_del_sa(struct xfrm_state *xs);13 14/**15 * ixgbe_ipsec_set_tx_sa - set the Tx SA registers16 * @hw: hw specific details17 * @idx: register index to write18 * @key: key byte array19 * @salt: salt bytes20 **/21static void ixgbe_ipsec_set_tx_sa(struct ixgbe_hw *hw, u16 idx,22 u32 key[], u32 salt)23{24 u32 reg;25 int i;26 27 for (i = 0; i < 4; i++)28 IXGBE_WRITE_REG(hw, IXGBE_IPSTXKEY(i),29 (__force u32)cpu_to_be32(key[3 - i]));30 IXGBE_WRITE_REG(hw, IXGBE_IPSTXSALT, (__force u32)cpu_to_be32(salt));31 IXGBE_WRITE_FLUSH(hw);32 33 reg = IXGBE_READ_REG(hw, IXGBE_IPSTXIDX);34 reg &= IXGBE_RXTXIDX_IPS_EN;35 reg |= idx << IXGBE_RXTXIDX_IDX_SHIFT | IXGBE_RXTXIDX_WRITE;36 IXGBE_WRITE_REG(hw, IXGBE_IPSTXIDX, reg);37 IXGBE_WRITE_FLUSH(hw);38}39 40/**41 * ixgbe_ipsec_set_rx_item - set an Rx table item42 * @hw: hw specific details43 * @idx: register index to write44 * @tbl: table selector45 *46 * Trigger the device to store into a particular Rx table the47 * data that has already been loaded into the input register48 **/49static void ixgbe_ipsec_set_rx_item(struct ixgbe_hw *hw, u16 idx,50 enum ixgbe_ipsec_tbl_sel tbl)51{52 u32 reg;53 54 reg = IXGBE_READ_REG(hw, IXGBE_IPSRXIDX);55 reg &= IXGBE_RXTXIDX_IPS_EN;56 reg |= tbl << IXGBE_RXIDX_TBL_SHIFT |57 idx << IXGBE_RXTXIDX_IDX_SHIFT |58 IXGBE_RXTXIDX_WRITE;59 IXGBE_WRITE_REG(hw, IXGBE_IPSRXIDX, reg);60 IXGBE_WRITE_FLUSH(hw);61}62 63/**64 * ixgbe_ipsec_set_rx_sa - set up the register bits to save SA info65 * @hw: hw specific details66 * @idx: register index to write67 * @spi: security parameter index68 * @key: key byte array69 * @salt: salt bytes70 * @mode: rx decrypt control bits71 * @ip_idx: index into IP table for related IP address72 **/73static void ixgbe_ipsec_set_rx_sa(struct ixgbe_hw *hw, u16 idx, __be32 spi,74 u32 key[], u32 salt, u32 mode, u32 ip_idx)75{76 int i;77 78 /* store the SPI (in bigendian) and IPidx */79 IXGBE_WRITE_REG(hw, IXGBE_IPSRXSPI,80 (__force u32)cpu_to_le32((__force u32)spi));81 IXGBE_WRITE_REG(hw, IXGBE_IPSRXIPIDX, ip_idx);82 IXGBE_WRITE_FLUSH(hw);83 84 ixgbe_ipsec_set_rx_item(hw, idx, ips_rx_spi_tbl);85 86 /* store the key, salt, and mode */87 for (i = 0; i < 4; i++)88 IXGBE_WRITE_REG(hw, IXGBE_IPSRXKEY(i),89 (__force u32)cpu_to_be32(key[3 - i]));90 IXGBE_WRITE_REG(hw, IXGBE_IPSRXSALT, (__force u32)cpu_to_be32(salt));91 IXGBE_WRITE_REG(hw, IXGBE_IPSRXMOD, mode);92 IXGBE_WRITE_FLUSH(hw);93 94 ixgbe_ipsec_set_rx_item(hw, idx, ips_rx_key_tbl);95}96 97/**98 * ixgbe_ipsec_set_rx_ip - set up the register bits to save SA IP addr info99 * @hw: hw specific details100 * @idx: register index to write101 * @addr: IP address byte array102 **/103static void ixgbe_ipsec_set_rx_ip(struct ixgbe_hw *hw, u16 idx, __be32 addr[])104{105 int i;106 107 /* store the ip address */108 for (i = 0; i < 4; i++)109 IXGBE_WRITE_REG(hw, IXGBE_IPSRXIPADDR(i),110 (__force u32)cpu_to_le32((__force u32)addr[i]));111 IXGBE_WRITE_FLUSH(hw);112 113 ixgbe_ipsec_set_rx_item(hw, idx, ips_rx_ip_tbl);114}115 116/**117 * ixgbe_ipsec_clear_hw_tables - because some tables don't get cleared on reset118 * @adapter: board private structure119 **/120static void ixgbe_ipsec_clear_hw_tables(struct ixgbe_adapter *adapter)121{122 struct ixgbe_hw *hw = &adapter->hw;123 u32 buf[4] = {0, 0, 0, 0};124 u16 idx;125 126 /* disable Rx and Tx SA lookup */127 IXGBE_WRITE_REG(hw, IXGBE_IPSRXIDX, 0);128 IXGBE_WRITE_REG(hw, IXGBE_IPSTXIDX, 0);129 130 /* scrub the tables - split the loops for the max of the IP table */131 for (idx = 0; idx < IXGBE_IPSEC_MAX_RX_IP_COUNT; idx++) {132 ixgbe_ipsec_set_tx_sa(hw, idx, buf, 0);133 ixgbe_ipsec_set_rx_sa(hw, idx, 0, buf, 0, 0, 0);134 ixgbe_ipsec_set_rx_ip(hw, idx, (__be32 *)buf);135 }136 for (; idx < IXGBE_IPSEC_MAX_SA_COUNT; idx++) {137 ixgbe_ipsec_set_tx_sa(hw, idx, buf, 0);138 ixgbe_ipsec_set_rx_sa(hw, idx, 0, buf, 0, 0, 0);139 }140}141 142/**143 * ixgbe_ipsec_stop_data144 * @adapter: board private structure145 **/146static void ixgbe_ipsec_stop_data(struct ixgbe_adapter *adapter)147{148 struct ixgbe_hw *hw = &adapter->hw;149 bool link = adapter->link_up;150 u32 t_rdy, r_rdy;151 u32 limit;152 u32 reg;153 154 /* halt data paths */155 reg = IXGBE_READ_REG(hw, IXGBE_SECTXCTRL);156 reg |= IXGBE_SECTXCTRL_TX_DIS;157 IXGBE_WRITE_REG(hw, IXGBE_SECTXCTRL, reg);158 159 reg = IXGBE_READ_REG(hw, IXGBE_SECRXCTRL);160 reg |= IXGBE_SECRXCTRL_RX_DIS;161 IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, reg);162 163 /* If both Tx and Rx are ready there are no packets164 * that we need to flush so the loopback configuration165 * below is not necessary.166 */167 t_rdy = IXGBE_READ_REG(hw, IXGBE_SECTXSTAT) &168 IXGBE_SECTXSTAT_SECTX_RDY;169 r_rdy = IXGBE_READ_REG(hw, IXGBE_SECRXSTAT) &170 IXGBE_SECRXSTAT_SECRX_RDY;171 if (t_rdy && r_rdy)172 return;173 174 /* If the tx fifo doesn't have link, but still has data,175 * we can't clear the tx sec block. Set the MAC loopback176 * before block clear177 */178 if (!link) {179 reg = IXGBE_READ_REG(hw, IXGBE_MACC);180 reg |= IXGBE_MACC_FLU;181 IXGBE_WRITE_REG(hw, IXGBE_MACC, reg);182 183 reg = IXGBE_READ_REG(hw, IXGBE_HLREG0);184 reg |= IXGBE_HLREG0_LPBK;185 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, reg);186 187 IXGBE_WRITE_FLUSH(hw);188 mdelay(3);189 }190 191 /* wait for the paths to empty */192 limit = 20;193 do {194 mdelay(10);195 t_rdy = IXGBE_READ_REG(hw, IXGBE_SECTXSTAT) &196 IXGBE_SECTXSTAT_SECTX_RDY;197 r_rdy = IXGBE_READ_REG(hw, IXGBE_SECRXSTAT) &198 IXGBE_SECRXSTAT_SECRX_RDY;199 } while (!(t_rdy && r_rdy) && limit--);200 201 /* undo loopback if we played with it earlier */202 if (!link) {203 reg = IXGBE_READ_REG(hw, IXGBE_MACC);204 reg &= ~IXGBE_MACC_FLU;205 IXGBE_WRITE_REG(hw, IXGBE_MACC, reg);206 207 reg = IXGBE_READ_REG(hw, IXGBE_HLREG0);208 reg &= ~IXGBE_HLREG0_LPBK;209 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, reg);210 211 IXGBE_WRITE_FLUSH(hw);212 }213}214 215/**216 * ixgbe_ipsec_stop_engine217 * @adapter: board private structure218 **/219static void ixgbe_ipsec_stop_engine(struct ixgbe_adapter *adapter)220{221 struct ixgbe_hw *hw = &adapter->hw;222 u32 reg;223 224 ixgbe_ipsec_stop_data(adapter);225 226 /* disable Rx and Tx SA lookup */227 IXGBE_WRITE_REG(hw, IXGBE_IPSTXIDX, 0);228 IXGBE_WRITE_REG(hw, IXGBE_IPSRXIDX, 0);229 230 /* disable the Rx and Tx engines and full packet store-n-forward */231 reg = IXGBE_READ_REG(hw, IXGBE_SECTXCTRL);232 reg |= IXGBE_SECTXCTRL_SECTX_DIS;233 reg &= ~IXGBE_SECTXCTRL_STORE_FORWARD;234 IXGBE_WRITE_REG(hw, IXGBE_SECTXCTRL, reg);235 236 reg = IXGBE_READ_REG(hw, IXGBE_SECRXCTRL);237 reg |= IXGBE_SECRXCTRL_SECRX_DIS;238 IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, reg);239 240 /* restore the "tx security buffer almost full threshold" to 0x250 */241 IXGBE_WRITE_REG(hw, IXGBE_SECTXBUFFAF, 0x250);242 243 /* Set minimum IFG between packets back to the default 0x1 */244 reg = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);245 reg = (reg & 0xfffffff0) | 0x1;246 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, reg);247 248 /* final set for normal (no ipsec offload) processing */249 IXGBE_WRITE_REG(hw, IXGBE_SECTXCTRL, IXGBE_SECTXCTRL_SECTX_DIS);250 IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, IXGBE_SECRXCTRL_SECRX_DIS);251 252 IXGBE_WRITE_FLUSH(hw);253}254 255/**256 * ixgbe_ipsec_start_engine257 * @adapter: board private structure258 *259 * NOTE: this increases power consumption whether being used or not260 **/261static void ixgbe_ipsec_start_engine(struct ixgbe_adapter *adapter)262{263 struct ixgbe_hw *hw = &adapter->hw;264 u32 reg;265 266 ixgbe_ipsec_stop_data(adapter);267 268 /* Set minimum IFG between packets to 3 */269 reg = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);270 reg = (reg & 0xfffffff0) | 0x3;271 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, reg);272 273 /* Set "tx security buffer almost full threshold" to 0x15 so that the274 * almost full indication is generated only after buffer contains at275 * least an entire jumbo packet.276 */277 reg = IXGBE_READ_REG(hw, IXGBE_SECTXBUFFAF);278 reg = (reg & 0xfffffc00) | 0x15;279 IXGBE_WRITE_REG(hw, IXGBE_SECTXBUFFAF, reg);280 281 /* restart the data paths by clearing the DISABLE bits */282 IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, 0);283 IXGBE_WRITE_REG(hw, IXGBE_SECTXCTRL, IXGBE_SECTXCTRL_STORE_FORWARD);284 285 /* enable Rx and Tx SA lookup */286 IXGBE_WRITE_REG(hw, IXGBE_IPSTXIDX, IXGBE_RXTXIDX_IPS_EN);287 IXGBE_WRITE_REG(hw, IXGBE_IPSRXIDX, IXGBE_RXTXIDX_IPS_EN);288 289 IXGBE_WRITE_FLUSH(hw);290}291 292/**293 * ixgbe_ipsec_restore - restore the ipsec HW settings after a reset294 * @adapter: board private structure295 *296 * Reload the HW tables from the SW tables after they've been bashed297 * by a chip reset.298 *299 * Any VF entries are removed from the SW and HW tables since either300 * (a) the VF also gets reset on PF reset and will ask again for the301 * offloads, or (b) the VF has been removed by a change in the num_vfs.302 **/303void ixgbe_ipsec_restore(struct ixgbe_adapter *adapter)304{305 struct ixgbe_ipsec *ipsec = adapter->ipsec;306 struct ixgbe_hw *hw = &adapter->hw;307 int i;308 309 if (!(adapter->flags2 & IXGBE_FLAG2_IPSEC_ENABLED))310 return;311 312 /* clean up and restart the engine */313 ixgbe_ipsec_stop_engine(adapter);314 ixgbe_ipsec_clear_hw_tables(adapter);315 ixgbe_ipsec_start_engine(adapter);316 317 /* reload the Rx and Tx keys */318 for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) {319 struct rx_sa *r = &ipsec->rx_tbl[i];320 struct tx_sa *t = &ipsec->tx_tbl[i];321 322 if (r->used) {323 if (r->mode & IXGBE_RXTXMOD_VF)324 ixgbe_ipsec_del_sa(r->xs);325 else326 ixgbe_ipsec_set_rx_sa(hw, i, r->xs->id.spi,327 r->key, r->salt,328 r->mode, r->iptbl_ind);329 }330 331 if (t->used) {332 if (t->mode & IXGBE_RXTXMOD_VF)333 ixgbe_ipsec_del_sa(t->xs);334 else335 ixgbe_ipsec_set_tx_sa(hw, i, t->key, t->salt);336 }337 }338 339 /* reload the IP addrs */340 for (i = 0; i < IXGBE_IPSEC_MAX_RX_IP_COUNT; i++) {341 struct rx_ip_sa *ipsa = &ipsec->ip_tbl[i];342 343 if (ipsa->used)344 ixgbe_ipsec_set_rx_ip(hw, i, ipsa->ipaddr);345 }346}347 348/**349 * ixgbe_ipsec_find_empty_idx - find the first unused security parameter index350 * @ipsec: pointer to ipsec struct351 * @rxtable: true if we need to look in the Rx table352 *353 * Returns the first unused index in either the Rx or Tx SA table354 **/355static int ixgbe_ipsec_find_empty_idx(struct ixgbe_ipsec *ipsec, bool rxtable)356{357 u32 i;358 359 if (rxtable) {360 if (ipsec->num_rx_sa == IXGBE_IPSEC_MAX_SA_COUNT)361 return -ENOSPC;362 363 /* search rx sa table */364 for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) {365 if (!ipsec->rx_tbl[i].used)366 return i;367 }368 } else {369 if (ipsec->num_tx_sa == IXGBE_IPSEC_MAX_SA_COUNT)370 return -ENOSPC;371 372 /* search tx sa table */373 for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) {374 if (!ipsec->tx_tbl[i].used)375 return i;376 }377 }378 379 return -ENOSPC;380}381 382/**383 * ixgbe_ipsec_find_rx_state - find the state that matches384 * @ipsec: pointer to ipsec struct385 * @daddr: inbound address to match386 * @proto: protocol to match387 * @spi: SPI to match388 * @ip4: true if using an ipv4 address389 *390 * Returns a pointer to the matching SA state information391 **/392static struct xfrm_state *ixgbe_ipsec_find_rx_state(struct ixgbe_ipsec *ipsec,393 __be32 *daddr, u8 proto,394 __be32 spi, bool ip4)395{396 struct rx_sa *rsa;397 struct xfrm_state *ret = NULL;398 399 rcu_read_lock();400 hash_for_each_possible_rcu(ipsec->rx_sa_list, rsa, hlist,401 (__force u32)spi) {402 if (rsa->mode & IXGBE_RXTXMOD_VF)403 continue;404 if (spi == rsa->xs->id.spi &&405 ((ip4 && *daddr == rsa->xs->id.daddr.a4) ||406 (!ip4 && !memcmp(daddr, &rsa->xs->id.daddr.a6,407 sizeof(rsa->xs->id.daddr.a6)))) &&408 proto == rsa->xs->id.proto) {409 ret = rsa->xs;410 xfrm_state_hold(ret);411 break;412 }413 }414 rcu_read_unlock();415 return ret;416}417 418/**419 * ixgbe_ipsec_parse_proto_keys - find the key and salt based on the protocol420 * @xs: pointer to xfrm_state struct421 * @mykey: pointer to key array to populate422 * @mysalt: pointer to salt value to populate423 *424 * This copies the protocol keys and salt to our own data tables. The425 * 82599 family only supports the one algorithm.426 **/427static int ixgbe_ipsec_parse_proto_keys(struct xfrm_state *xs,428 u32 *mykey, u32 *mysalt)429{430 struct net_device *dev = xs->xso.real_dev;431 unsigned char *key_data;432 char *alg_name = NULL;433 int key_len;434 435 if (!xs->aead) {436 netdev_err(dev, "Unsupported IPsec algorithm\n");437 return -EINVAL;438 }439 440 if (xs->aead->alg_icv_len != IXGBE_IPSEC_AUTH_BITS) {441 netdev_err(dev, "IPsec offload requires %d bit authentication\n",442 IXGBE_IPSEC_AUTH_BITS);443 return -EINVAL;444 }445 446 key_data = &xs->aead->alg_key[0];447 key_len = xs->aead->alg_key_len;448 alg_name = xs->aead->alg_name;449 450 if (strcmp(alg_name, aes_gcm_name)) {451 netdev_err(dev, "Unsupported IPsec algorithm - please use %s\n",452 aes_gcm_name);453 return -EINVAL;454 }455 456 /* The key bytes come down in a bigendian array of bytes, so457 * we don't need to do any byteswapping.458 * 160 accounts for 16 byte key and 4 byte salt459 */460 if (key_len == IXGBE_IPSEC_KEY_BITS) {461 *mysalt = ((u32 *)key_data)[4];462 } else if (key_len != (IXGBE_IPSEC_KEY_BITS - (sizeof(*mysalt) * 8))) {463 netdev_err(dev, "IPsec hw offload only supports keys up to 128 bits with a 32 bit salt\n");464 return -EINVAL;465 } else {466 netdev_info(dev, "IPsec hw offload parameters missing 32 bit salt value\n");467 *mysalt = 0;468 }469 memcpy(mykey, key_data, 16);470 471 return 0;472}473 474/**475 * ixgbe_ipsec_check_mgmt_ip - make sure there is no clash with mgmt IP filters476 * @xs: pointer to transformer state struct477 **/478static int ixgbe_ipsec_check_mgmt_ip(struct xfrm_state *xs)479{480 struct net_device *dev = xs->xso.real_dev;481 struct ixgbe_adapter *adapter = netdev_priv(dev);482 struct ixgbe_hw *hw = &adapter->hw;483 u32 mfval, manc, reg;484 int num_filters = 4;485 bool manc_ipv4;486 u32 bmcipval;487 int i, j;488 489#define MANC_EN_IPV4_FILTER BIT(24)490#define MFVAL_IPV4_FILTER_SHIFT 16491#define MFVAL_IPV6_FILTER_SHIFT 24492#define MIPAF_ARR(_m, _n) (IXGBE_MIPAF + ((_m) * 0x10) + ((_n) * 4))493 494#define IXGBE_BMCIP(_n) (0x5050 + ((_n) * 4))495#define IXGBE_BMCIPVAL 0x5060496#define BMCIP_V4 0x2497#define BMCIP_V6 0x3498#define BMCIP_MASK 0x3499 500 manc = IXGBE_READ_REG(hw, IXGBE_MANC);501 manc_ipv4 = !!(manc & MANC_EN_IPV4_FILTER);502 mfval = IXGBE_READ_REG(hw, IXGBE_MFVAL);503 bmcipval = IXGBE_READ_REG(hw, IXGBE_BMCIPVAL);504 505 if (xs->props.family == AF_INET) {506 /* are there any IPv4 filters to check? */507 if (manc_ipv4) {508 /* the 4 ipv4 filters are all in MIPAF(3, i) */509 for (i = 0; i < num_filters; i++) {510 if (!(mfval & BIT(MFVAL_IPV4_FILTER_SHIFT + i)))511 continue;512 513 reg = IXGBE_READ_REG(hw, MIPAF_ARR(3, i));514 if (reg == (__force u32)xs->id.daddr.a4)515 return 1;516 }517 }518 519 if ((bmcipval & BMCIP_MASK) == BMCIP_V4) {520 reg = IXGBE_READ_REG(hw, IXGBE_BMCIP(3));521 if (reg == (__force u32)xs->id.daddr.a4)522 return 1;523 }524 525 } else {526 /* if there are ipv4 filters, they are in the last ipv6 slot */527 if (manc_ipv4)528 num_filters = 3;529 530 for (i = 0; i < num_filters; i++) {531 if (!(mfval & BIT(MFVAL_IPV6_FILTER_SHIFT + i)))532 continue;533 534 for (j = 0; j < 4; j++) {535 reg = IXGBE_READ_REG(hw, MIPAF_ARR(i, j));536 if (reg != (__force u32)xs->id.daddr.a6[j])537 break;538 }539 if (j == 4) /* did we match all 4 words? */540 return 1;541 }542 543 if ((bmcipval & BMCIP_MASK) == BMCIP_V6) {544 for (j = 0; j < 4; j++) {545 reg = IXGBE_READ_REG(hw, IXGBE_BMCIP(j));546 if (reg != (__force u32)xs->id.daddr.a6[j])547 break;548 }549 if (j == 4) /* did we match all 4 words? */550 return 1;551 }552 }553 554 return 0;555}556 557/**558 * ixgbe_ipsec_add_sa - program device with a security association559 * @xs: pointer to transformer state struct560 * @extack: extack point to fill failure reason561 **/562static int ixgbe_ipsec_add_sa(struct xfrm_state *xs,563 struct netlink_ext_ack *extack)564{565 struct net_device *dev = xs->xso.real_dev;566 struct ixgbe_adapter *adapter = netdev_priv(dev);567 struct ixgbe_ipsec *ipsec = adapter->ipsec;568 struct ixgbe_hw *hw = &adapter->hw;569 int checked, match, first;570 u16 sa_idx;571 int ret;572 int i;573 574 if (xs->id.proto != IPPROTO_ESP && xs->id.proto != IPPROTO_AH) {575 NL_SET_ERR_MSG_MOD(extack, "Unsupported protocol for ipsec offload");576 return -EINVAL;577 }578 579 if (xs->props.mode != XFRM_MODE_TRANSPORT) {580 NL_SET_ERR_MSG_MOD(extack, "Unsupported mode for ipsec offload");581 return -EINVAL;582 }583 584 if (ixgbe_ipsec_check_mgmt_ip(xs)) {585 NL_SET_ERR_MSG_MOD(extack, "IPsec IP addr clash with mgmt filters");586 return -EINVAL;587 }588 589 if (xs->xso.type != XFRM_DEV_OFFLOAD_CRYPTO) {590 NL_SET_ERR_MSG_MOD(extack, "Unsupported ipsec offload type");591 return -EINVAL;592 }593 594 if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) {595 struct rx_sa rsa;596 597 if (xs->calg) {598 NL_SET_ERR_MSG_MOD(extack, "Compression offload not supported");599 return -EINVAL;600 }601 602 /* find the first unused index */603 ret = ixgbe_ipsec_find_empty_idx(ipsec, true);604 if (ret < 0) {605 NL_SET_ERR_MSG_MOD(extack, "No space for SA in Rx table!");606 return ret;607 }608 sa_idx = (u16)ret;609 610 memset(&rsa, 0, sizeof(rsa));611 rsa.used = true;612 rsa.xs = xs;613 614 if (rsa.xs->id.proto & IPPROTO_ESP)615 rsa.decrypt = xs->ealg || xs->aead;616 617 /* get the key and salt */618 ret = ixgbe_ipsec_parse_proto_keys(xs, rsa.key, &rsa.salt);619 if (ret) {620 NL_SET_ERR_MSG_MOD(extack, "Failed to get key data for Rx SA table");621 return ret;622 }623 624 /* get ip for rx sa table */625 if (xs->props.family == AF_INET6)626 memcpy(rsa.ipaddr, &xs->id.daddr.a6, 16);627 else628 memcpy(&rsa.ipaddr[3], &xs->id.daddr.a4, 4);629 630 /* The HW does not have a 1:1 mapping from keys to IP addrs, so631 * check for a matching IP addr entry in the table. If the addr632 * already exists, use it; else find an unused slot and add the633 * addr. If one does not exist and there are no unused table634 * entries, fail the request.635 */636 637 /* Find an existing match or first not used, and stop looking638 * after we've checked all we know we have.639 */640 checked = 0;641 match = -1;642 first = -1;643 for (i = 0;644 i < IXGBE_IPSEC_MAX_RX_IP_COUNT &&645 (checked < ipsec->num_rx_sa || first < 0);646 i++) {647 if (ipsec->ip_tbl[i].used) {648 if (!memcmp(ipsec->ip_tbl[i].ipaddr,649 rsa.ipaddr, sizeof(rsa.ipaddr))) {650 match = i;651 break;652 }653 checked++;654 } else if (first < 0) {655 first = i; /* track the first empty seen */656 }657 }658 659 if (ipsec->num_rx_sa == 0)660 first = 0;661 662 if (match >= 0) {663 /* addrs are the same, we should use this one */664 rsa.iptbl_ind = match;665 ipsec->ip_tbl[match].ref_cnt++;666 667 } else if (first >= 0) {668 /* no matches, but here's an empty slot */669 rsa.iptbl_ind = first;670 671 memcpy(ipsec->ip_tbl[first].ipaddr,672 rsa.ipaddr, sizeof(rsa.ipaddr));673 ipsec->ip_tbl[first].ref_cnt = 1;674 ipsec->ip_tbl[first].used = true;675 676 ixgbe_ipsec_set_rx_ip(hw, rsa.iptbl_ind, rsa.ipaddr);677 678 } else {679 /* no match and no empty slot */680 NL_SET_ERR_MSG_MOD(extack, "No space for SA in Rx IP SA table");681 memset(&rsa, 0, sizeof(rsa));682 return -ENOSPC;683 }684 685 rsa.mode = IXGBE_RXMOD_VALID;686 if (rsa.xs->id.proto & IPPROTO_ESP)687 rsa.mode |= IXGBE_RXMOD_PROTO_ESP;688 if (rsa.decrypt)689 rsa.mode |= IXGBE_RXMOD_DECRYPT;690 if (rsa.xs->props.family == AF_INET6)691 rsa.mode |= IXGBE_RXMOD_IPV6;692 693 /* the preparations worked, so save the info */694 memcpy(&ipsec->rx_tbl[sa_idx], &rsa, sizeof(rsa));695 696 ixgbe_ipsec_set_rx_sa(hw, sa_idx, rsa.xs->id.spi, rsa.key,697 rsa.salt, rsa.mode, rsa.iptbl_ind);698 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_RX_INDEX;699 700 ipsec->num_rx_sa++;701 702 /* hash the new entry for faster search in Rx path */703 hash_add_rcu(ipsec->rx_sa_list, &ipsec->rx_tbl[sa_idx].hlist,704 (__force u32)rsa.xs->id.spi);705 } else {706 struct tx_sa tsa;707 708 if (adapter->num_vfs &&709 adapter->bridge_mode != BRIDGE_MODE_VEPA)710 return -EOPNOTSUPP;711 712 /* find the first unused index */713 ret = ixgbe_ipsec_find_empty_idx(ipsec, false);714 if (ret < 0) {715 NL_SET_ERR_MSG_MOD(extack, "No space for SA in Tx table");716 return ret;717 }718 sa_idx = (u16)ret;719 720 memset(&tsa, 0, sizeof(tsa));721 tsa.used = true;722 tsa.xs = xs;723 724 if (xs->id.proto & IPPROTO_ESP)725 tsa.encrypt = xs->ealg || xs->aead;726 727 ret = ixgbe_ipsec_parse_proto_keys(xs, tsa.key, &tsa.salt);728 if (ret) {729 NL_SET_ERR_MSG_MOD(extack, "Failed to get key data for Tx SA table");730 memset(&tsa, 0, sizeof(tsa));731 return ret;732 }733 734 /* the preparations worked, so save the info */735 memcpy(&ipsec->tx_tbl[sa_idx], &tsa, sizeof(tsa));736 737 ixgbe_ipsec_set_tx_sa(hw, sa_idx, tsa.key, tsa.salt);738 739 xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_TX_INDEX;740 741 ipsec->num_tx_sa++;742 }743 744 /* enable the engine if not already warmed up */745 if (!(adapter->flags2 & IXGBE_FLAG2_IPSEC_ENABLED)) {746 ixgbe_ipsec_start_engine(adapter);747 adapter->flags2 |= IXGBE_FLAG2_IPSEC_ENABLED;748 }749 750 return 0;751}752 753/**754 * ixgbe_ipsec_del_sa - clear out this specific SA755 * @xs: pointer to transformer state struct756 **/757static void ixgbe_ipsec_del_sa(struct xfrm_state *xs)758{759 struct net_device *dev = xs->xso.real_dev;760 struct ixgbe_adapter *adapter = netdev_priv(dev);761 struct ixgbe_ipsec *ipsec = adapter->ipsec;762 struct ixgbe_hw *hw = &adapter->hw;763 u32 zerobuf[4] = {0, 0, 0, 0};764 u16 sa_idx;765 766 if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) {767 struct rx_sa *rsa;768 u8 ipi;769 770 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_RX_INDEX;771 rsa = &ipsec->rx_tbl[sa_idx];772 773 if (!rsa->used) {774 netdev_err(dev, "Invalid Rx SA selected sa_idx=%d offload_handle=%lu\n",775 sa_idx, xs->xso.offload_handle);776 return;777 }778 779 ixgbe_ipsec_set_rx_sa(hw, sa_idx, 0, zerobuf, 0, 0, 0);780 hash_del_rcu(&rsa->hlist);781 782 /* if the IP table entry is referenced by only this SA,783 * i.e. ref_cnt is only 1, clear the IP table entry as well784 */785 ipi = rsa->iptbl_ind;786 if (ipsec->ip_tbl[ipi].ref_cnt > 0) {787 ipsec->ip_tbl[ipi].ref_cnt--;788 789 if (!ipsec->ip_tbl[ipi].ref_cnt) {790 memset(&ipsec->ip_tbl[ipi], 0,791 sizeof(struct rx_ip_sa));792 ixgbe_ipsec_set_rx_ip(hw, ipi,793 (__force __be32 *)zerobuf);794 }795 }796 797 memset(rsa, 0, sizeof(struct rx_sa));798 ipsec->num_rx_sa--;799 } else {800 sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX;801 802 if (!ipsec->tx_tbl[sa_idx].used) {803 netdev_err(dev, "Invalid Tx SA selected sa_idx=%d offload_handle=%lu\n",804 sa_idx, xs->xso.offload_handle);805 return;806 }807 808 ixgbe_ipsec_set_tx_sa(hw, sa_idx, zerobuf, 0);809 memset(&ipsec->tx_tbl[sa_idx], 0, sizeof(struct tx_sa));810 ipsec->num_tx_sa--;811 }812 813 /* if there are no SAs left, stop the engine to save energy */814 if (ipsec->num_rx_sa == 0 && ipsec->num_tx_sa == 0) {815 adapter->flags2 &= ~IXGBE_FLAG2_IPSEC_ENABLED;816 ixgbe_ipsec_stop_engine(adapter);817 }818}819 820/**821 * ixgbe_ipsec_offload_ok - can this packet use the xfrm hw offload822 * @skb: current data packet823 * @xs: pointer to transformer state struct824 **/825static bool ixgbe_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs)826{827 if (xs->props.family == AF_INET) {828 /* Offload with IPv4 options is not supported yet */829 if (ip_hdr(skb)->ihl != 5)830 return false;831 } else {832 /* Offload with IPv6 extension headers is not support yet */833 if (ipv6_ext_hdr(ipv6_hdr(skb)->nexthdr))834 return false;835 }836 837 return true;838}839 840static const struct xfrmdev_ops ixgbe_xfrmdev_ops = {841 .xdo_dev_state_add = ixgbe_ipsec_add_sa,842 .xdo_dev_state_delete = ixgbe_ipsec_del_sa,843 .xdo_dev_offload_ok = ixgbe_ipsec_offload_ok,844};845 846/**847 * ixgbe_ipsec_vf_clear - clear the tables of data for a VF848 * @adapter: board private structure849 * @vf: VF id to be removed850 **/851void ixgbe_ipsec_vf_clear(struct ixgbe_adapter *adapter, u32 vf)852{853 struct ixgbe_ipsec *ipsec = adapter->ipsec;854 int i;855 856 if (!ipsec)857 return;858 859 /* search rx sa table */860 for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT && ipsec->num_rx_sa; i++) {861 if (!ipsec->rx_tbl[i].used)862 continue;863 if (ipsec->rx_tbl[i].mode & IXGBE_RXTXMOD_VF &&864 ipsec->rx_tbl[i].vf == vf)865 ixgbe_ipsec_del_sa(ipsec->rx_tbl[i].xs);866 }867 868 /* search tx sa table */869 for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT && ipsec->num_tx_sa; i++) {870 if (!ipsec->tx_tbl[i].used)871 continue;872 if (ipsec->tx_tbl[i].mode & IXGBE_RXTXMOD_VF &&873 ipsec->tx_tbl[i].vf == vf)874 ixgbe_ipsec_del_sa(ipsec->tx_tbl[i].xs);875 }876}877 878/**879 * ixgbe_ipsec_vf_add_sa - translate VF request to SA add880 * @adapter: board private structure881 * @msgbuf: The message buffer882 * @vf: the VF index883 *884 * Make up a new xs and algorithm info from the data sent by the VF.885 * We only need to sketch in just enough to set up the HW offload.886 * Put the resulting offload_handle into the return message to the VF.887 *888 * Returns 0 or error value889 **/890int ixgbe_ipsec_vf_add_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)891{892 struct ixgbe_ipsec *ipsec = adapter->ipsec;893 struct xfrm_algo_desc *algo;894 struct sa_mbx_msg *sam;895 struct xfrm_state *xs;896 size_t aead_len;897 u16 sa_idx;898 u32 pfsa;899 int err;900 901 sam = (struct sa_mbx_msg *)(&msgbuf[1]);902 if (!adapter->vfinfo[vf].trusted ||903 !(adapter->flags2 & IXGBE_FLAG2_VF_IPSEC_ENABLED)) {904 e_warn(drv, "VF %d attempted to add an IPsec SA\n", vf);905 err = -EACCES;906 goto err_out;907 }908 909 /* Tx IPsec offload doesn't seem to work on this910 * device, so block these requests for now.911 */912 if (sam->dir != XFRM_DEV_OFFLOAD_IN) {913 err = -EOPNOTSUPP;914 goto err_out;915 }916 917 algo = xfrm_aead_get_byname(aes_gcm_name, IXGBE_IPSEC_AUTH_BITS, 1);918 if (unlikely(!algo)) {919 err = -ENOENT;920 goto err_out;921 }922 923 xs = kzalloc(sizeof(*xs), GFP_ATOMIC);924 if (unlikely(!xs)) {925 err = -ENOMEM;926 goto err_out;927 }928 929 xs->xso.dir = sam->dir;930 xs->id.spi = sam->spi;931 xs->id.proto = sam->proto;932 xs->props.family = sam->family;933 if (xs->props.family == AF_INET6)934 memcpy(&xs->id.daddr.a6, sam->addr, sizeof(xs->id.daddr.a6));935 else936 memcpy(&xs->id.daddr.a4, sam->addr, sizeof(xs->id.daddr.a4));937 xs->xso.dev = adapter->netdev;938 939 aead_len = sizeof(*xs->aead) + IXGBE_IPSEC_KEY_BITS / 8;940 xs->aead = kzalloc(aead_len, GFP_ATOMIC);941 if (unlikely(!xs->aead)) {942 err = -ENOMEM;943 goto err_xs;944 }945 946 xs->props.ealgo = algo->desc.sadb_alg_id;947 xs->geniv = algo->uinfo.aead.geniv;948 xs->aead->alg_icv_len = IXGBE_IPSEC_AUTH_BITS;949 xs->aead->alg_key_len = IXGBE_IPSEC_KEY_BITS;950 memcpy(xs->aead->alg_key, sam->key, sizeof(sam->key));951 memcpy(xs->aead->alg_name, aes_gcm_name, sizeof(aes_gcm_name));952 953 /* set up the HW offload */954 err = ixgbe_ipsec_add_sa(xs, NULL);955 if (err)956 goto err_aead;957 958 pfsa = xs->xso.offload_handle;959 if (pfsa < IXGBE_IPSEC_BASE_TX_INDEX) {960 sa_idx = pfsa - IXGBE_IPSEC_BASE_RX_INDEX;961 ipsec->rx_tbl[sa_idx].vf = vf;962 ipsec->rx_tbl[sa_idx].mode |= IXGBE_RXTXMOD_VF;963 } else {964 sa_idx = pfsa - IXGBE_IPSEC_BASE_TX_INDEX;965 ipsec->tx_tbl[sa_idx].vf = vf;966 ipsec->tx_tbl[sa_idx].mode |= IXGBE_RXTXMOD_VF;967 }968 969 msgbuf[1] = xs->xso.offload_handle;970 971 return 0;972 973err_aead:974 kfree_sensitive(xs->aead);975err_xs:976 kfree_sensitive(xs);977err_out:978 msgbuf[1] = err;979 return err;980}981 982/**983 * ixgbe_ipsec_vf_del_sa - translate VF request to SA delete984 * @adapter: board private structure985 * @msgbuf: The message buffer986 * @vf: the VF index987 *988 * Given the offload_handle sent by the VF, look for the related SA table989 * entry and use its xs field to call for a delete of the SA.990 *991 * Note: We silently ignore requests to delete entries that are already992 * set to unused because when a VF is set to "DOWN", the PF first993 * gets a reset and clears all the VF's entries; then the VF's994 * XFRM stack sends individual deletes for each entry, which the995 * reset already removed. In the future it might be good to try to996 * optimize this so not so many unnecessary delete messages are sent.997 *998 * Returns 0 or error value999 **/1000int ixgbe_ipsec_vf_del_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)1001{1002 struct ixgbe_ipsec *ipsec = adapter->ipsec;1003 struct xfrm_state *xs;1004 u32 pfsa = msgbuf[1];1005 u16 sa_idx;1006 1007 if (!adapter->vfinfo[vf].trusted) {1008 e_err(drv, "vf %d attempted to delete an SA\n", vf);1009 return -EPERM;1010 }1011 1012 if (pfsa < IXGBE_IPSEC_BASE_TX_INDEX) {1013 struct rx_sa *rsa;1014 1015 sa_idx = pfsa - IXGBE_IPSEC_BASE_RX_INDEX;1016 if (sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT) {1017 e_err(drv, "vf %d SA index %d out of range\n",1018 vf, sa_idx);1019 return -EINVAL;1020 }1021 1022 rsa = &ipsec->rx_tbl[sa_idx];1023 1024 if (!rsa->used)1025 return 0;1026 1027 if (!(rsa->mode & IXGBE_RXTXMOD_VF) ||1028 rsa->vf != vf) {1029 e_err(drv, "vf %d bad Rx SA index %d\n", vf, sa_idx);1030 return -ENOENT;1031 }1032 1033 xs = ipsec->rx_tbl[sa_idx].xs;1034 } else {1035 struct tx_sa *tsa;1036 1037 sa_idx = pfsa - IXGBE_IPSEC_BASE_TX_INDEX;1038 if (sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT) {1039 e_err(drv, "vf %d SA index %d out of range\n",1040 vf, sa_idx);1041 return -EINVAL;1042 }1043 1044 tsa = &ipsec->tx_tbl[sa_idx];1045 1046 if (!tsa->used)1047 return 0;1048 1049 if (!(tsa->mode & IXGBE_RXTXMOD_VF) ||1050 tsa->vf != vf) {1051 e_err(drv, "vf %d bad Tx SA index %d\n", vf, sa_idx);1052 return -ENOENT;1053 }1054 1055 xs = ipsec->tx_tbl[sa_idx].xs;1056 }1057 1058 ixgbe_ipsec_del_sa(xs);1059 1060 /* remove the xs that was made-up in the add request */1061 kfree_sensitive(xs);1062 1063 return 0;1064}1065 1066/**1067 * ixgbe_ipsec_tx - setup Tx flags for ipsec offload1068 * @tx_ring: outgoing context1069 * @first: current data packet1070 * @itd: ipsec Tx data for later use in building context descriptor1071 **/1072int ixgbe_ipsec_tx(struct ixgbe_ring *tx_ring,1073 struct ixgbe_tx_buffer *first,1074 struct ixgbe_ipsec_tx_data *itd)1075{1076 struct ixgbe_adapter *adapter = netdev_priv(tx_ring->netdev);1077 struct ixgbe_ipsec *ipsec = adapter->ipsec;1078 struct xfrm_state *xs;1079 struct sec_path *sp;1080 struct tx_sa *tsa;1081 1082 sp = skb_sec_path(first->skb);1083 if (unlikely(!sp->len)) {1084 netdev_err(tx_ring->netdev, "%s: no xfrm state len = %d\n",1085 __func__, sp->len);1086 return 0;1087 }1088 1089 xs = xfrm_input_state(first->skb);1090 if (unlikely(!xs)) {1091 netdev_err(tx_ring->netdev, "%s: no xfrm_input_state() xs = %p\n",1092 __func__, xs);1093 return 0;1094 }1095 1096 itd->sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX;1097 if (unlikely(itd->sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT)) {1098 netdev_err(tx_ring->netdev, "%s: bad sa_idx=%d handle=%lu\n",1099 __func__, itd->sa_idx, xs->xso.offload_handle);1100 return 0;1101 }1102 1103 tsa = &ipsec->tx_tbl[itd->sa_idx];1104 if (unlikely(!tsa->used)) {1105 netdev_err(tx_ring->netdev, "%s: unused sa_idx=%d\n",1106 __func__, itd->sa_idx);1107 return 0;1108 }1109 1110 first->tx_flags |= IXGBE_TX_FLAGS_IPSEC | IXGBE_TX_FLAGS_CC;1111 1112 if (xs->id.proto == IPPROTO_ESP) {1113 1114 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_TYPE_ESP |1115 IXGBE_ADVTXD_TUCMD_L4T_TCP;1116 if (first->protocol == htons(ETH_P_IP))1117 itd->flags |= IXGBE_ADVTXD_TUCMD_IPV4;1118 1119 /* The actual trailer length is authlen (16 bytes) plus1120 * 2 bytes for the proto and the padlen values, plus1121 * padlen bytes of padding. This ends up not the same1122 * as the static value found in xs->props.trailer_len (21).1123 *1124 * ... but if we're doing GSO, don't bother as the stack1125 * doesn't add a trailer for those.1126 */1127 if (!skb_is_gso(first->skb)) {1128 /* The "correct" way to get the auth length would be1129 * to use1130 * authlen = crypto_aead_authsize(xs->data);1131 * but since we know we only have one size to worry1132 * about * we can let the compiler use the constant1133 * and save us a few CPU cycles.1134 */1135 const int authlen = IXGBE_IPSEC_AUTH_BITS / 8;1136 struct sk_buff *skb = first->skb;1137 u8 padlen;1138 int ret;1139 1140 ret = skb_copy_bits(skb, skb->len - (authlen + 2),1141 &padlen, 1);1142 if (unlikely(ret))1143 return 0;1144 itd->trailer_len = authlen + 2 + padlen;1145 }1146 }1147 if (tsa->encrypt)1148 itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_ENCRYPT_EN;1149 1150 return 1;1151}1152 1153/**1154 * ixgbe_ipsec_rx - decode ipsec bits from Rx descriptor1155 * @rx_ring: receiving ring1156 * @rx_desc: receive data descriptor1157 * @skb: current data packet1158 *1159 * Determine if there was an ipsec encapsulation noticed, and if so set up1160 * the resulting status for later in the receive stack.1161 **/1162void ixgbe_ipsec_rx(struct ixgbe_ring *rx_ring,1163 union ixgbe_adv_rx_desc *rx_desc,1164 struct sk_buff *skb)1165{1166 struct ixgbe_adapter *adapter = netdev_priv(rx_ring->netdev);1167 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;1168 __le16 ipsec_pkt_types = cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH |1169 IXGBE_RXDADV_PKTTYPE_IPSEC_ESP);1170 struct ixgbe_ipsec *ipsec = adapter->ipsec;1171 struct xfrm_offload *xo = NULL;1172 struct xfrm_state *xs = NULL;1173 struct ipv6hdr *ip6 = NULL;1174 struct iphdr *ip4 = NULL;1175 struct sec_path *sp;1176 void *daddr;1177 __be32 spi;1178 u8 *c_hdr;1179 u8 proto;1180 1181 /* Find the ip and crypto headers in the data.1182 * We can assume no vlan header in the way, b/c the1183 * hw won't recognize the IPsec packet and anyway the1184 * currently vlan device doesn't support xfrm offload.1185 */1186 if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV4)) {1187 ip4 = (struct iphdr *)(skb->data + ETH_HLEN);1188 daddr = &ip4->daddr;1189 c_hdr = (u8 *)ip4 + ip4->ihl * 4;1190 } else if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV6)) {1191 ip6 = (struct ipv6hdr *)(skb->data + ETH_HLEN);1192 daddr = &ip6->daddr;1193 c_hdr = (u8 *)ip6 + sizeof(struct ipv6hdr);1194 } else {1195 return;1196 }1197 1198 switch (pkt_info & ipsec_pkt_types) {1199 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH):1200 spi = ((struct ip_auth_hdr *)c_hdr)->spi;1201 proto = IPPROTO_AH;1202 break;1203 case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_ESP):1204 spi = ((struct ip_esp_hdr *)c_hdr)->spi;1205 proto = IPPROTO_ESP;1206 break;1207 default:1208 return;1209 }1210 1211 xs = ixgbe_ipsec_find_rx_state(ipsec, daddr, proto, spi, !!ip4);1212 if (unlikely(!xs))1213 return;1214 1215 sp = secpath_set(skb);1216 if (unlikely(!sp))1217 return;1218 1219 sp->xvec[sp->len++] = xs;1220 sp->olen++;1221 xo = xfrm_offload(skb);1222 xo->flags = CRYPTO_DONE;1223 xo->status = CRYPTO_SUCCESS;1224 1225 adapter->rx_ipsec++;1226}1227 1228/**1229 * ixgbe_init_ipsec_offload - initialize security registers for IPSec operation1230 * @adapter: board private structure1231 **/1232void ixgbe_init_ipsec_offload(struct ixgbe_adapter *adapter)1233{1234 struct ixgbe_hw *hw = &adapter->hw;1235 struct ixgbe_ipsec *ipsec;1236 u32 t_dis, r_dis;1237 size_t size;1238 1239 if (hw->mac.type == ixgbe_mac_82598EB)1240 return;1241 1242 /* If there is no support for either Tx or Rx offload1243 * we should not be advertising support for IPsec.1244 */1245 t_dis = IXGBE_READ_REG(hw, IXGBE_SECTXSTAT) &1246 IXGBE_SECTXSTAT_SECTX_OFF_DIS;1247 r_dis = IXGBE_READ_REG(hw, IXGBE_SECRXSTAT) &1248 IXGBE_SECRXSTAT_SECRX_OFF_DIS;1249 if (t_dis || r_dis)1250 return;1251 1252 ipsec = kzalloc(sizeof(*ipsec), GFP_KERNEL);1253 if (!ipsec)1254 goto err1;1255 hash_init(ipsec->rx_sa_list);1256 1257 size = sizeof(struct rx_sa) * IXGBE_IPSEC_MAX_SA_COUNT;1258 ipsec->rx_tbl = kzalloc(size, GFP_KERNEL);1259 if (!ipsec->rx_tbl)1260 goto err2;1261 1262 size = sizeof(struct tx_sa) * IXGBE_IPSEC_MAX_SA_COUNT;1263 ipsec->tx_tbl = kzalloc(size, GFP_KERNEL);1264 if (!ipsec->tx_tbl)1265 goto err2;1266 1267 size = sizeof(struct rx_ip_sa) * IXGBE_IPSEC_MAX_RX_IP_COUNT;1268 ipsec->ip_tbl = kzalloc(size, GFP_KERNEL);1269 if (!ipsec->ip_tbl)1270 goto err2;1271 1272 ipsec->num_rx_sa = 0;1273 ipsec->num_tx_sa = 0;1274 1275 adapter->ipsec = ipsec;1276 ixgbe_ipsec_stop_engine(adapter);1277 ixgbe_ipsec_clear_hw_tables(adapter);1278 1279 adapter->netdev->xfrmdev_ops = &ixgbe_xfrmdev_ops;1280 1281 return;1282 1283err2:1284 kfree(ipsec->ip_tbl);1285 kfree(ipsec->rx_tbl);1286 kfree(ipsec->tx_tbl);1287 kfree(ipsec);1288err1:1289 netdev_err(adapter->netdev, "Unable to allocate memory for SA tables");1290}1291 1292/**1293 * ixgbe_stop_ipsec_offload - tear down the ipsec offload1294 * @adapter: board private structure1295 **/1296void ixgbe_stop_ipsec_offload(struct ixgbe_adapter *adapter)1297{1298 struct ixgbe_ipsec *ipsec = adapter->ipsec;1299 1300 adapter->ipsec = NULL;1301 if (ipsec) {1302 kfree(ipsec->ip_tbl);1303 kfree(ipsec->rx_tbl);1304 kfree(ipsec->tx_tbl);1305 kfree(ipsec);1306 }1307}1308