diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c | 1301 |
1 files changed, 1301 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c new file mode 100644 index 000000000..774de63dd --- /dev/null +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c @@ -0,0 +1,1301 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2017 Oracle and/or its affiliates. All rights reserved. */ + +#include "ixgbe.h" +#include <net/xfrm.h> +#include <crypto/aead.h> +#include <linux/if_bridge.h> + +#define IXGBE_IPSEC_KEY_BITS 160 +static const char aes_gcm_name[] = "rfc4106(gcm(aes))"; + +static void ixgbe_ipsec_del_sa(struct xfrm_state *xs); + +/** + * ixgbe_ipsec_set_tx_sa - set the Tx SA registers + * @hw: hw specific details + * @idx: register index to write + * @key: key byte array + * @salt: salt bytes + **/ +static void ixgbe_ipsec_set_tx_sa(struct ixgbe_hw *hw, u16 idx, + u32 key[], u32 salt) +{ + u32 reg; + int i; + + for (i = 0; i < 4; i++) + IXGBE_WRITE_REG(hw, IXGBE_IPSTXKEY(i), + (__force u32)cpu_to_be32(key[3 - i])); + IXGBE_WRITE_REG(hw, IXGBE_IPSTXSALT, (__force u32)cpu_to_be32(salt)); + IXGBE_WRITE_FLUSH(hw); + + reg = IXGBE_READ_REG(hw, IXGBE_IPSTXIDX); + reg &= IXGBE_RXTXIDX_IPS_EN; + reg |= idx << IXGBE_RXTXIDX_IDX_SHIFT | IXGBE_RXTXIDX_WRITE; + IXGBE_WRITE_REG(hw, IXGBE_IPSTXIDX, reg); + IXGBE_WRITE_FLUSH(hw); +} + +/** + * ixgbe_ipsec_set_rx_item - set an Rx table item + * @hw: hw specific details + * @idx: register index to write + * @tbl: table selector + * + * Trigger the device to store into a particular Rx table the + * data that has already been loaded into the input register + **/ +static void ixgbe_ipsec_set_rx_item(struct ixgbe_hw *hw, u16 idx, + enum ixgbe_ipsec_tbl_sel tbl) +{ + u32 reg; + + reg = IXGBE_READ_REG(hw, IXGBE_IPSRXIDX); + reg &= IXGBE_RXTXIDX_IPS_EN; + reg |= tbl << IXGBE_RXIDX_TBL_SHIFT | + idx << IXGBE_RXTXIDX_IDX_SHIFT | + IXGBE_RXTXIDX_WRITE; + IXGBE_WRITE_REG(hw, IXGBE_IPSRXIDX, reg); + IXGBE_WRITE_FLUSH(hw); +} + +/** + * ixgbe_ipsec_set_rx_sa - set up the register bits to save SA info + * @hw: hw specific details + * @idx: register index to write + * @spi: security parameter index + * @key: key byte array + * @salt: salt bytes + * @mode: rx decrypt control bits + * @ip_idx: index into IP table for related IP address + **/ +static void ixgbe_ipsec_set_rx_sa(struct ixgbe_hw *hw, u16 idx, __be32 spi, + u32 key[], u32 salt, u32 mode, u32 ip_idx) +{ + int i; + + /* store the SPI (in bigendian) and IPidx */ + IXGBE_WRITE_REG(hw, IXGBE_IPSRXSPI, + (__force u32)cpu_to_le32((__force u32)spi)); + IXGBE_WRITE_REG(hw, IXGBE_IPSRXIPIDX, ip_idx); + IXGBE_WRITE_FLUSH(hw); + + ixgbe_ipsec_set_rx_item(hw, idx, ips_rx_spi_tbl); + + /* store the key, salt, and mode */ + for (i = 0; i < 4; i++) + IXGBE_WRITE_REG(hw, IXGBE_IPSRXKEY(i), + (__force u32)cpu_to_be32(key[3 - i])); + IXGBE_WRITE_REG(hw, IXGBE_IPSRXSALT, (__force u32)cpu_to_be32(salt)); + IXGBE_WRITE_REG(hw, IXGBE_IPSRXMOD, mode); + IXGBE_WRITE_FLUSH(hw); + + ixgbe_ipsec_set_rx_item(hw, idx, ips_rx_key_tbl); +} + +/** + * ixgbe_ipsec_set_rx_ip - set up the register bits to save SA IP addr info + * @hw: hw specific details + * @idx: register index to write + * @addr: IP address byte array + **/ +static void ixgbe_ipsec_set_rx_ip(struct ixgbe_hw *hw, u16 idx, __be32 addr[]) +{ + int i; + + /* store the ip address */ + for (i = 0; i < 4; i++) + IXGBE_WRITE_REG(hw, IXGBE_IPSRXIPADDR(i), + (__force u32)cpu_to_le32((__force u32)addr[i])); + IXGBE_WRITE_FLUSH(hw); + + ixgbe_ipsec_set_rx_item(hw, idx, ips_rx_ip_tbl); +} + +/** + * ixgbe_ipsec_clear_hw_tables - because some tables don't get cleared on reset + * @adapter: board private structure + **/ +static void ixgbe_ipsec_clear_hw_tables(struct ixgbe_adapter *adapter) +{ + struct ixgbe_hw *hw = &adapter->hw; + u32 buf[4] = {0, 0, 0, 0}; + u16 idx; + + /* disable Rx and Tx SA lookup */ + IXGBE_WRITE_REG(hw, IXGBE_IPSRXIDX, 0); + IXGBE_WRITE_REG(hw, IXGBE_IPSTXIDX, 0); + + /* scrub the tables - split the loops for the max of the IP table */ + for (idx = 0; idx < IXGBE_IPSEC_MAX_RX_IP_COUNT; idx++) { + ixgbe_ipsec_set_tx_sa(hw, idx, buf, 0); + ixgbe_ipsec_set_rx_sa(hw, idx, 0, buf, 0, 0, 0); + ixgbe_ipsec_set_rx_ip(hw, idx, (__be32 *)buf); + } + for (; idx < IXGBE_IPSEC_MAX_SA_COUNT; idx++) { + ixgbe_ipsec_set_tx_sa(hw, idx, buf, 0); + ixgbe_ipsec_set_rx_sa(hw, idx, 0, buf, 0, 0, 0); + } +} + +/** + * ixgbe_ipsec_stop_data + * @adapter: board private structure + **/ +static void ixgbe_ipsec_stop_data(struct ixgbe_adapter *adapter) +{ + struct ixgbe_hw *hw = &adapter->hw; + bool link = adapter->link_up; + u32 t_rdy, r_rdy; + u32 limit; + u32 reg; + + /* halt data paths */ + reg = IXGBE_READ_REG(hw, IXGBE_SECTXCTRL); + reg |= IXGBE_SECTXCTRL_TX_DIS; + IXGBE_WRITE_REG(hw, IXGBE_SECTXCTRL, reg); + + reg = IXGBE_READ_REG(hw, IXGBE_SECRXCTRL); + reg |= IXGBE_SECRXCTRL_RX_DIS; + IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, reg); + + /* If both Tx and Rx are ready there are no packets + * that we need to flush so the loopback configuration + * below is not necessary. + */ + t_rdy = IXGBE_READ_REG(hw, IXGBE_SECTXSTAT) & + IXGBE_SECTXSTAT_SECTX_RDY; + r_rdy = IXGBE_READ_REG(hw, IXGBE_SECRXSTAT) & + IXGBE_SECRXSTAT_SECRX_RDY; + if (t_rdy && r_rdy) + return; + + /* If the tx fifo doesn't have link, but still has data, + * we can't clear the tx sec block. Set the MAC loopback + * before block clear + */ + if (!link) { + reg = IXGBE_READ_REG(hw, IXGBE_MACC); + reg |= IXGBE_MACC_FLU; + IXGBE_WRITE_REG(hw, IXGBE_MACC, reg); + + reg = IXGBE_READ_REG(hw, IXGBE_HLREG0); + reg |= IXGBE_HLREG0_LPBK; + IXGBE_WRITE_REG(hw, IXGBE_HLREG0, reg); + + IXGBE_WRITE_FLUSH(hw); + mdelay(3); + } + + /* wait for the paths to empty */ + limit = 20; + do { + mdelay(10); + t_rdy = IXGBE_READ_REG(hw, IXGBE_SECTXSTAT) & + IXGBE_SECTXSTAT_SECTX_RDY; + r_rdy = IXGBE_READ_REG(hw, IXGBE_SECRXSTAT) & + IXGBE_SECRXSTAT_SECRX_RDY; + } while (!(t_rdy && r_rdy) && limit--); + + /* undo loopback if we played with it earlier */ + if (!link) { + reg = IXGBE_READ_REG(hw, IXGBE_MACC); + reg &= ~IXGBE_MACC_FLU; + IXGBE_WRITE_REG(hw, IXGBE_MACC, reg); + + reg = IXGBE_READ_REG(hw, IXGBE_HLREG0); + reg &= ~IXGBE_HLREG0_LPBK; + IXGBE_WRITE_REG(hw, IXGBE_HLREG0, reg); + + IXGBE_WRITE_FLUSH(hw); + } +} + +/** + * ixgbe_ipsec_stop_engine + * @adapter: board private structure + **/ +static void ixgbe_ipsec_stop_engine(struct ixgbe_adapter *adapter) +{ + struct ixgbe_hw *hw = &adapter->hw; + u32 reg; + + ixgbe_ipsec_stop_data(adapter); + + /* disable Rx and Tx SA lookup */ + IXGBE_WRITE_REG(hw, IXGBE_IPSTXIDX, 0); + IXGBE_WRITE_REG(hw, IXGBE_IPSRXIDX, 0); + + /* disable the Rx and Tx engines and full packet store-n-forward */ + reg = IXGBE_READ_REG(hw, IXGBE_SECTXCTRL); + reg |= IXGBE_SECTXCTRL_SECTX_DIS; + reg &= ~IXGBE_SECTXCTRL_STORE_FORWARD; + IXGBE_WRITE_REG(hw, IXGBE_SECTXCTRL, reg); + + reg = IXGBE_READ_REG(hw, IXGBE_SECRXCTRL); + reg |= IXGBE_SECRXCTRL_SECRX_DIS; + IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, reg); + + /* restore the "tx security buffer almost full threshold" to 0x250 */ + IXGBE_WRITE_REG(hw, IXGBE_SECTXBUFFAF, 0x250); + + /* Set minimum IFG between packets back to the default 0x1 */ + reg = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG); + reg = (reg & 0xfffffff0) | 0x1; + IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, reg); + + /* final set for normal (no ipsec offload) processing */ + IXGBE_WRITE_REG(hw, IXGBE_SECTXCTRL, IXGBE_SECTXCTRL_SECTX_DIS); + IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, IXGBE_SECRXCTRL_SECRX_DIS); + + IXGBE_WRITE_FLUSH(hw); +} + +/** + * ixgbe_ipsec_start_engine + * @adapter: board private structure + * + * NOTE: this increases power consumption whether being used or not + **/ +static void ixgbe_ipsec_start_engine(struct ixgbe_adapter *adapter) +{ + struct ixgbe_hw *hw = &adapter->hw; + u32 reg; + + ixgbe_ipsec_stop_data(adapter); + + /* Set minimum IFG between packets to 3 */ + reg = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG); + reg = (reg & 0xfffffff0) | 0x3; + IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, reg); + + /* Set "tx security buffer almost full threshold" to 0x15 so that the + * almost full indication is generated only after buffer contains at + * least an entire jumbo packet. + */ + reg = IXGBE_READ_REG(hw, IXGBE_SECTXBUFFAF); + reg = (reg & 0xfffffc00) | 0x15; + IXGBE_WRITE_REG(hw, IXGBE_SECTXBUFFAF, reg); + + /* restart the data paths by clearing the DISABLE bits */ + IXGBE_WRITE_REG(hw, IXGBE_SECRXCTRL, 0); + IXGBE_WRITE_REG(hw, IXGBE_SECTXCTRL, IXGBE_SECTXCTRL_STORE_FORWARD); + + /* enable Rx and Tx SA lookup */ + IXGBE_WRITE_REG(hw, IXGBE_IPSTXIDX, IXGBE_RXTXIDX_IPS_EN); + IXGBE_WRITE_REG(hw, IXGBE_IPSRXIDX, IXGBE_RXTXIDX_IPS_EN); + + IXGBE_WRITE_FLUSH(hw); +} + +/** + * ixgbe_ipsec_restore - restore the ipsec HW settings after a reset + * @adapter: board private structure + * + * Reload the HW tables from the SW tables after they've been bashed + * by a chip reset. + * + * Any VF entries are removed from the SW and HW tables since either + * (a) the VF also gets reset on PF reset and will ask again for the + * offloads, or (b) the VF has been removed by a change in the num_vfs. + **/ +void ixgbe_ipsec_restore(struct ixgbe_adapter *adapter) +{ + struct ixgbe_ipsec *ipsec = adapter->ipsec; + struct ixgbe_hw *hw = &adapter->hw; + int i; + + if (!(adapter->flags2 & IXGBE_FLAG2_IPSEC_ENABLED)) + return; + + /* clean up and restart the engine */ + ixgbe_ipsec_stop_engine(adapter); + ixgbe_ipsec_clear_hw_tables(adapter); + ixgbe_ipsec_start_engine(adapter); + + /* reload the Rx and Tx keys */ + for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) { + struct rx_sa *r = &ipsec->rx_tbl[i]; + struct tx_sa *t = &ipsec->tx_tbl[i]; + + if (r->used) { + if (r->mode & IXGBE_RXTXMOD_VF) + ixgbe_ipsec_del_sa(r->xs); + else + ixgbe_ipsec_set_rx_sa(hw, i, r->xs->id.spi, + r->key, r->salt, + r->mode, r->iptbl_ind); + } + + if (t->used) { + if (t->mode & IXGBE_RXTXMOD_VF) + ixgbe_ipsec_del_sa(t->xs); + else + ixgbe_ipsec_set_tx_sa(hw, i, t->key, t->salt); + } + } + + /* reload the IP addrs */ + for (i = 0; i < IXGBE_IPSEC_MAX_RX_IP_COUNT; i++) { + struct rx_ip_sa *ipsa = &ipsec->ip_tbl[i]; + + if (ipsa->used) + ixgbe_ipsec_set_rx_ip(hw, i, ipsa->ipaddr); + } +} + +/** + * ixgbe_ipsec_find_empty_idx - find the first unused security parameter index + * @ipsec: pointer to ipsec struct + * @rxtable: true if we need to look in the Rx table + * + * Returns the first unused index in either the Rx or Tx SA table + **/ +static int ixgbe_ipsec_find_empty_idx(struct ixgbe_ipsec *ipsec, bool rxtable) +{ + u32 i; + + if (rxtable) { + if (ipsec->num_rx_sa == IXGBE_IPSEC_MAX_SA_COUNT) + return -ENOSPC; + + /* search rx sa table */ + for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) { + if (!ipsec->rx_tbl[i].used) + return i; + } + } else { + if (ipsec->num_tx_sa == IXGBE_IPSEC_MAX_SA_COUNT) + return -ENOSPC; + + /* search tx sa table */ + for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) { + if (!ipsec->tx_tbl[i].used) + return i; + } + } + + return -ENOSPC; +} + +/** + * ixgbe_ipsec_find_rx_state - find the state that matches + * @ipsec: pointer to ipsec struct + * @daddr: inbound address to match + * @proto: protocol to match + * @spi: SPI to match + * @ip4: true if using an ipv4 address + * + * Returns a pointer to the matching SA state information + **/ +static struct xfrm_state *ixgbe_ipsec_find_rx_state(struct ixgbe_ipsec *ipsec, + __be32 *daddr, u8 proto, + __be32 spi, bool ip4) +{ + struct rx_sa *rsa; + struct xfrm_state *ret = NULL; + + rcu_read_lock(); + hash_for_each_possible_rcu(ipsec->rx_sa_list, rsa, hlist, + (__force u32)spi) { + if (rsa->mode & IXGBE_RXTXMOD_VF) + continue; + if (spi == rsa->xs->id.spi && + ((ip4 && *daddr == rsa->xs->id.daddr.a4) || + (!ip4 && !memcmp(daddr, &rsa->xs->id.daddr.a6, + sizeof(rsa->xs->id.daddr.a6)))) && + proto == rsa->xs->id.proto) { + ret = rsa->xs; + xfrm_state_hold(ret); + break; + } + } + rcu_read_unlock(); + return ret; +} + +/** + * ixgbe_ipsec_parse_proto_keys - find the key and salt based on the protocol + * @xs: pointer to xfrm_state struct + * @mykey: pointer to key array to populate + * @mysalt: pointer to salt value to populate + * + * This copies the protocol keys and salt to our own data tables. The + * 82599 family only supports the one algorithm. + **/ +static int ixgbe_ipsec_parse_proto_keys(struct xfrm_state *xs, + u32 *mykey, u32 *mysalt) +{ + struct net_device *dev = xs->xso.real_dev; + unsigned char *key_data; + char *alg_name = NULL; + int key_len; + + if (!xs->aead) { + netdev_err(dev, "Unsupported IPsec algorithm\n"); + return -EINVAL; + } + + if (xs->aead->alg_icv_len != IXGBE_IPSEC_AUTH_BITS) { + netdev_err(dev, "IPsec offload requires %d bit authentication\n", + IXGBE_IPSEC_AUTH_BITS); + return -EINVAL; + } + + key_data = &xs->aead->alg_key[0]; + key_len = xs->aead->alg_key_len; + alg_name = xs->aead->alg_name; + + if (strcmp(alg_name, aes_gcm_name)) { + netdev_err(dev, "Unsupported IPsec algorithm - please use %s\n", + aes_gcm_name); + return -EINVAL; + } + + /* The key bytes come down in a bigendian array of bytes, so + * we don't need to do any byteswapping. + * 160 accounts for 16 byte key and 4 byte salt + */ + if (key_len == IXGBE_IPSEC_KEY_BITS) { + *mysalt = ((u32 *)key_data)[4]; + } else if (key_len != (IXGBE_IPSEC_KEY_BITS - (sizeof(*mysalt) * 8))) { + netdev_err(dev, "IPsec hw offload only supports keys up to 128 bits with a 32 bit salt\n"); + return -EINVAL; + } else { + netdev_info(dev, "IPsec hw offload parameters missing 32 bit salt value\n"); + *mysalt = 0; + } + memcpy(mykey, key_data, 16); + + return 0; +} + +/** + * ixgbe_ipsec_check_mgmt_ip - make sure there is no clash with mgmt IP filters + * @xs: pointer to transformer state struct + **/ +static int ixgbe_ipsec_check_mgmt_ip(struct xfrm_state *xs) +{ + struct net_device *dev = xs->xso.real_dev; + struct ixgbe_adapter *adapter = netdev_priv(dev); + struct ixgbe_hw *hw = &adapter->hw; + u32 mfval, manc, reg; + int num_filters = 4; + bool manc_ipv4; + u32 bmcipval; + int i, j; + +#define MANC_EN_IPV4_FILTER BIT(24) +#define MFVAL_IPV4_FILTER_SHIFT 16 +#define MFVAL_IPV6_FILTER_SHIFT 24 +#define MIPAF_ARR(_m, _n) (IXGBE_MIPAF + ((_m) * 0x10) + ((_n) * 4)) + +#define IXGBE_BMCIP(_n) (0x5050 + ((_n) * 4)) +#define IXGBE_BMCIPVAL 0x5060 +#define BMCIP_V4 0x2 +#define BMCIP_V6 0x3 +#define BMCIP_MASK 0x3 + + manc = IXGBE_READ_REG(hw, IXGBE_MANC); + manc_ipv4 = !!(manc & MANC_EN_IPV4_FILTER); + mfval = IXGBE_READ_REG(hw, IXGBE_MFVAL); + bmcipval = IXGBE_READ_REG(hw, IXGBE_BMCIPVAL); + + if (xs->props.family == AF_INET) { + /* are there any IPv4 filters to check? */ + if (manc_ipv4) { + /* the 4 ipv4 filters are all in MIPAF(3, i) */ + for (i = 0; i < num_filters; i++) { + if (!(mfval & BIT(MFVAL_IPV4_FILTER_SHIFT + i))) + continue; + + reg = IXGBE_READ_REG(hw, MIPAF_ARR(3, i)); + if (reg == (__force u32)xs->id.daddr.a4) + return 1; + } + } + + if ((bmcipval & BMCIP_MASK) == BMCIP_V4) { + reg = IXGBE_READ_REG(hw, IXGBE_BMCIP(3)); + if (reg == (__force u32)xs->id.daddr.a4) + return 1; + } + + } else { + /* if there are ipv4 filters, they are in the last ipv6 slot */ + if (manc_ipv4) + num_filters = 3; + + for (i = 0; i < num_filters; i++) { + if (!(mfval & BIT(MFVAL_IPV6_FILTER_SHIFT + i))) + continue; + + for (j = 0; j < 4; j++) { + reg = IXGBE_READ_REG(hw, MIPAF_ARR(i, j)); + if (reg != (__force u32)xs->id.daddr.a6[j]) + break; + } + if (j == 4) /* did we match all 4 words? */ + return 1; + } + + if ((bmcipval & BMCIP_MASK) == BMCIP_V6) { + for (j = 0; j < 4; j++) { + reg = IXGBE_READ_REG(hw, IXGBE_BMCIP(j)); + if (reg != (__force u32)xs->id.daddr.a6[j]) + break; + } + if (j == 4) /* did we match all 4 words? */ + return 1; + } + } + + return 0; +} + +/** + * ixgbe_ipsec_add_sa - program device with a security association + * @xs: pointer to transformer state struct + **/ +static int ixgbe_ipsec_add_sa(struct xfrm_state *xs) +{ + struct net_device *dev = xs->xso.real_dev; + struct ixgbe_adapter *adapter = netdev_priv(dev); + struct ixgbe_ipsec *ipsec = adapter->ipsec; + struct ixgbe_hw *hw = &adapter->hw; + int checked, match, first; + u16 sa_idx; + int ret; + int i; + + if (xs->id.proto != IPPROTO_ESP && xs->id.proto != IPPROTO_AH) { + netdev_err(dev, "Unsupported protocol 0x%04x for ipsec offload\n", + xs->id.proto); + return -EINVAL; + } + + if (xs->props.mode != XFRM_MODE_TRANSPORT) { + netdev_err(dev, "Unsupported mode for ipsec offload\n"); + return -EINVAL; + } + + if (ixgbe_ipsec_check_mgmt_ip(xs)) { + netdev_err(dev, "IPsec IP addr clash with mgmt filters\n"); + return -EINVAL; + } + + if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) { + struct rx_sa rsa; + + if (xs->calg) { + netdev_err(dev, "Compression offload not supported\n"); + return -EINVAL; + } + + /* find the first unused index */ + ret = ixgbe_ipsec_find_empty_idx(ipsec, true); + if (ret < 0) { + netdev_err(dev, "No space for SA in Rx table!\n"); + return ret; + } + sa_idx = (u16)ret; + + memset(&rsa, 0, sizeof(rsa)); + rsa.used = true; + rsa.xs = xs; + + if (rsa.xs->id.proto & IPPROTO_ESP) + rsa.decrypt = xs->ealg || xs->aead; + + /* get the key and salt */ + ret = ixgbe_ipsec_parse_proto_keys(xs, rsa.key, &rsa.salt); + if (ret) { + netdev_err(dev, "Failed to get key data for Rx SA table\n"); + return ret; + } + + /* get ip for rx sa table */ + if (xs->props.family == AF_INET6) + memcpy(rsa.ipaddr, &xs->id.daddr.a6, 16); + else + memcpy(&rsa.ipaddr[3], &xs->id.daddr.a4, 4); + + /* The HW does not have a 1:1 mapping from keys to IP addrs, so + * check for a matching IP addr entry in the table. If the addr + * already exists, use it; else find an unused slot and add the + * addr. If one does not exist and there are no unused table + * entries, fail the request. + */ + + /* Find an existing match or first not used, and stop looking + * after we've checked all we know we have. + */ + checked = 0; + match = -1; + first = -1; + for (i = 0; + i < IXGBE_IPSEC_MAX_RX_IP_COUNT && + (checked < ipsec->num_rx_sa || first < 0); + i++) { + if (ipsec->ip_tbl[i].used) { + if (!memcmp(ipsec->ip_tbl[i].ipaddr, + rsa.ipaddr, sizeof(rsa.ipaddr))) { + match = i; + break; + } + checked++; + } else if (first < 0) { + first = i; /* track the first empty seen */ + } + } + + if (ipsec->num_rx_sa == 0) + first = 0; + + if (match >= 0) { + /* addrs are the same, we should use this one */ + rsa.iptbl_ind = match; + ipsec->ip_tbl[match].ref_cnt++; + + } else if (first >= 0) { + /* no matches, but here's an empty slot */ + rsa.iptbl_ind = first; + + memcpy(ipsec->ip_tbl[first].ipaddr, + rsa.ipaddr, sizeof(rsa.ipaddr)); + ipsec->ip_tbl[first].ref_cnt = 1; + ipsec->ip_tbl[first].used = true; + + ixgbe_ipsec_set_rx_ip(hw, rsa.iptbl_ind, rsa.ipaddr); + + } else { + /* no match and no empty slot */ + netdev_err(dev, "No space for SA in Rx IP SA table\n"); + memset(&rsa, 0, sizeof(rsa)); + return -ENOSPC; + } + + rsa.mode = IXGBE_RXMOD_VALID; + if (rsa.xs->id.proto & IPPROTO_ESP) + rsa.mode |= IXGBE_RXMOD_PROTO_ESP; + if (rsa.decrypt) + rsa.mode |= IXGBE_RXMOD_DECRYPT; + if (rsa.xs->props.family == AF_INET6) + rsa.mode |= IXGBE_RXMOD_IPV6; + + /* the preparations worked, so save the info */ + memcpy(&ipsec->rx_tbl[sa_idx], &rsa, sizeof(rsa)); + + ixgbe_ipsec_set_rx_sa(hw, sa_idx, rsa.xs->id.spi, rsa.key, + rsa.salt, rsa.mode, rsa.iptbl_ind); + xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_RX_INDEX; + + ipsec->num_rx_sa++; + + /* hash the new entry for faster search in Rx path */ + hash_add_rcu(ipsec->rx_sa_list, &ipsec->rx_tbl[sa_idx].hlist, + (__force u32)rsa.xs->id.spi); + } else { + struct tx_sa tsa; + + if (adapter->num_vfs && + adapter->bridge_mode != BRIDGE_MODE_VEPA) + return -EOPNOTSUPP; + + /* find the first unused index */ + ret = ixgbe_ipsec_find_empty_idx(ipsec, false); + if (ret < 0) { + netdev_err(dev, "No space for SA in Tx table\n"); + return ret; + } + sa_idx = (u16)ret; + + memset(&tsa, 0, sizeof(tsa)); + tsa.used = true; + tsa.xs = xs; + + if (xs->id.proto & IPPROTO_ESP) + tsa.encrypt = xs->ealg || xs->aead; + + ret = ixgbe_ipsec_parse_proto_keys(xs, tsa.key, &tsa.salt); + if (ret) { + netdev_err(dev, "Failed to get key data for Tx SA table\n"); + memset(&tsa, 0, sizeof(tsa)); + return ret; + } + + /* the preparations worked, so save the info */ + memcpy(&ipsec->tx_tbl[sa_idx], &tsa, sizeof(tsa)); + + ixgbe_ipsec_set_tx_sa(hw, sa_idx, tsa.key, tsa.salt); + + xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_TX_INDEX; + + ipsec->num_tx_sa++; + } + + /* enable the engine if not already warmed up */ + if (!(adapter->flags2 & IXGBE_FLAG2_IPSEC_ENABLED)) { + ixgbe_ipsec_start_engine(adapter); + adapter->flags2 |= IXGBE_FLAG2_IPSEC_ENABLED; + } + + return 0; +} + +/** + * ixgbe_ipsec_del_sa - clear out this specific SA + * @xs: pointer to transformer state struct + **/ +static void ixgbe_ipsec_del_sa(struct xfrm_state *xs) +{ + struct net_device *dev = xs->xso.real_dev; + struct ixgbe_adapter *adapter = netdev_priv(dev); + struct ixgbe_ipsec *ipsec = adapter->ipsec; + struct ixgbe_hw *hw = &adapter->hw; + u32 zerobuf[4] = {0, 0, 0, 0}; + u16 sa_idx; + + if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) { + struct rx_sa *rsa; + u8 ipi; + + sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_RX_INDEX; + rsa = &ipsec->rx_tbl[sa_idx]; + + if (!rsa->used) { + netdev_err(dev, "Invalid Rx SA selected sa_idx=%d offload_handle=%lu\n", + sa_idx, xs->xso.offload_handle); + return; + } + + ixgbe_ipsec_set_rx_sa(hw, sa_idx, 0, zerobuf, 0, 0, 0); + hash_del_rcu(&rsa->hlist); + + /* if the IP table entry is referenced by only this SA, + * i.e. ref_cnt is only 1, clear the IP table entry as well + */ + ipi = rsa->iptbl_ind; + if (ipsec->ip_tbl[ipi].ref_cnt > 0) { + ipsec->ip_tbl[ipi].ref_cnt--; + + if (!ipsec->ip_tbl[ipi].ref_cnt) { + memset(&ipsec->ip_tbl[ipi], 0, + sizeof(struct rx_ip_sa)); + ixgbe_ipsec_set_rx_ip(hw, ipi, + (__force __be32 *)zerobuf); + } + } + + memset(rsa, 0, sizeof(struct rx_sa)); + ipsec->num_rx_sa--; + } else { + sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX; + + if (!ipsec->tx_tbl[sa_idx].used) { + netdev_err(dev, "Invalid Tx SA selected sa_idx=%d offload_handle=%lu\n", + sa_idx, xs->xso.offload_handle); + return; + } + + ixgbe_ipsec_set_tx_sa(hw, sa_idx, zerobuf, 0); + memset(&ipsec->tx_tbl[sa_idx], 0, sizeof(struct tx_sa)); + ipsec->num_tx_sa--; + } + + /* if there are no SAs left, stop the engine to save energy */ + if (ipsec->num_rx_sa == 0 && ipsec->num_tx_sa == 0) { + adapter->flags2 &= ~IXGBE_FLAG2_IPSEC_ENABLED; + ixgbe_ipsec_stop_engine(adapter); + } +} + +/** + * ixgbe_ipsec_offload_ok - can this packet use the xfrm hw offload + * @skb: current data packet + * @xs: pointer to transformer state struct + **/ +static bool ixgbe_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs) +{ + if (xs->props.family == AF_INET) { + /* Offload with IPv4 options is not supported yet */ + if (ip_hdr(skb)->ihl != 5) + return false; + } else { + /* Offload with IPv6 extension headers is not support yet */ + if (ipv6_ext_hdr(ipv6_hdr(skb)->nexthdr)) + return false; + } + + return true; +} + +static const struct xfrmdev_ops ixgbe_xfrmdev_ops = { + .xdo_dev_state_add = ixgbe_ipsec_add_sa, + .xdo_dev_state_delete = ixgbe_ipsec_del_sa, + .xdo_dev_offload_ok = ixgbe_ipsec_offload_ok, +}; + +/** + * ixgbe_ipsec_vf_clear - clear the tables of data for a VF + * @adapter: board private structure + * @vf: VF id to be removed + **/ +void ixgbe_ipsec_vf_clear(struct ixgbe_adapter *adapter, u32 vf) +{ + struct ixgbe_ipsec *ipsec = adapter->ipsec; + int i; + + if (!ipsec) + return; + + /* search rx sa table */ + for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT && ipsec->num_rx_sa; i++) { + if (!ipsec->rx_tbl[i].used) + continue; + if (ipsec->rx_tbl[i].mode & IXGBE_RXTXMOD_VF && + ipsec->rx_tbl[i].vf == vf) + ixgbe_ipsec_del_sa(ipsec->rx_tbl[i].xs); + } + + /* search tx sa table */ + for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT && ipsec->num_tx_sa; i++) { + if (!ipsec->tx_tbl[i].used) + continue; + if (ipsec->tx_tbl[i].mode & IXGBE_RXTXMOD_VF && + ipsec->tx_tbl[i].vf == vf) + ixgbe_ipsec_del_sa(ipsec->tx_tbl[i].xs); + } +} + +/** + * ixgbe_ipsec_vf_add_sa - translate VF request to SA add + * @adapter: board private structure + * @msgbuf: The message buffer + * @vf: the VF index + * + * Make up a new xs and algorithm info from the data sent by the VF. + * We only need to sketch in just enough to set up the HW offload. + * Put the resulting offload_handle into the return message to the VF. + * + * Returns 0 or error value + **/ +int ixgbe_ipsec_vf_add_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf) +{ + struct ixgbe_ipsec *ipsec = adapter->ipsec; + struct xfrm_algo_desc *algo; + struct sa_mbx_msg *sam; + struct xfrm_state *xs; + size_t aead_len; + u16 sa_idx; + u32 pfsa; + int err; + + sam = (struct sa_mbx_msg *)(&msgbuf[1]); + if (!adapter->vfinfo[vf].trusted || + !(adapter->flags2 & IXGBE_FLAG2_VF_IPSEC_ENABLED)) { + e_warn(drv, "VF %d attempted to add an IPsec SA\n", vf); + err = -EACCES; + goto err_out; + } + + /* Tx IPsec offload doesn't seem to work on this + * device, so block these requests for now. + */ + if (sam->dir != XFRM_DEV_OFFLOAD_IN) { + err = -EOPNOTSUPP; + goto err_out; + } + + xs = kzalloc(sizeof(*xs), GFP_KERNEL); + if (unlikely(!xs)) { + err = -ENOMEM; + goto err_out; + } + + xs->xso.dir = sam->dir; + xs->id.spi = sam->spi; + xs->id.proto = sam->proto; + xs->props.family = sam->family; + if (xs->props.family == AF_INET6) + memcpy(&xs->id.daddr.a6, sam->addr, sizeof(xs->id.daddr.a6)); + else + memcpy(&xs->id.daddr.a4, sam->addr, sizeof(xs->id.daddr.a4)); + xs->xso.dev = adapter->netdev; + + algo = xfrm_aead_get_byname(aes_gcm_name, IXGBE_IPSEC_AUTH_BITS, 1); + if (unlikely(!algo)) { + err = -ENOENT; + goto err_xs; + } + + aead_len = sizeof(*xs->aead) + IXGBE_IPSEC_KEY_BITS / 8; + xs->aead = kzalloc(aead_len, GFP_KERNEL); + if (unlikely(!xs->aead)) { + err = -ENOMEM; + goto err_xs; + } + + xs->props.ealgo = algo->desc.sadb_alg_id; + xs->geniv = algo->uinfo.aead.geniv; + xs->aead->alg_icv_len = IXGBE_IPSEC_AUTH_BITS; + xs->aead->alg_key_len = IXGBE_IPSEC_KEY_BITS; + memcpy(xs->aead->alg_key, sam->key, sizeof(sam->key)); + memcpy(xs->aead->alg_name, aes_gcm_name, sizeof(aes_gcm_name)); + + /* set up the HW offload */ + err = ixgbe_ipsec_add_sa(xs); + if (err) + goto err_aead; + + pfsa = xs->xso.offload_handle; + if (pfsa < IXGBE_IPSEC_BASE_TX_INDEX) { + sa_idx = pfsa - IXGBE_IPSEC_BASE_RX_INDEX; + ipsec->rx_tbl[sa_idx].vf = vf; + ipsec->rx_tbl[sa_idx].mode |= IXGBE_RXTXMOD_VF; + } else { + sa_idx = pfsa - IXGBE_IPSEC_BASE_TX_INDEX; + ipsec->tx_tbl[sa_idx].vf = vf; + ipsec->tx_tbl[sa_idx].mode |= IXGBE_RXTXMOD_VF; + } + + msgbuf[1] = xs->xso.offload_handle; + + return 0; + +err_aead: + kfree_sensitive(xs->aead); +err_xs: + kfree_sensitive(xs); +err_out: + msgbuf[1] = err; + return err; +} + +/** + * ixgbe_ipsec_vf_del_sa - translate VF request to SA delete + * @adapter: board private structure + * @msgbuf: The message buffer + * @vf: the VF index + * + * Given the offload_handle sent by the VF, look for the related SA table + * entry and use its xs field to call for a delete of the SA. + * + * Note: We silently ignore requests to delete entries that are already + * set to unused because when a VF is set to "DOWN", the PF first + * gets a reset and clears all the VF's entries; then the VF's + * XFRM stack sends individual deletes for each entry, which the + * reset already removed. In the future it might be good to try to + * optimize this so not so many unnecessary delete messages are sent. + * + * Returns 0 or error value + **/ +int ixgbe_ipsec_vf_del_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf) +{ + struct ixgbe_ipsec *ipsec = adapter->ipsec; + struct xfrm_state *xs; + u32 pfsa = msgbuf[1]; + u16 sa_idx; + + if (!adapter->vfinfo[vf].trusted) { + e_err(drv, "vf %d attempted to delete an SA\n", vf); + return -EPERM; + } + + if (pfsa < IXGBE_IPSEC_BASE_TX_INDEX) { + struct rx_sa *rsa; + + sa_idx = pfsa - IXGBE_IPSEC_BASE_RX_INDEX; + if (sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT) { + e_err(drv, "vf %d SA index %d out of range\n", + vf, sa_idx); + return -EINVAL; + } + + rsa = &ipsec->rx_tbl[sa_idx]; + + if (!rsa->used) + return 0; + + if (!(rsa->mode & IXGBE_RXTXMOD_VF) || + rsa->vf != vf) { + e_err(drv, "vf %d bad Rx SA index %d\n", vf, sa_idx); + return -ENOENT; + } + + xs = ipsec->rx_tbl[sa_idx].xs; + } else { + struct tx_sa *tsa; + + sa_idx = pfsa - IXGBE_IPSEC_BASE_TX_INDEX; + if (sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT) { + e_err(drv, "vf %d SA index %d out of range\n", + vf, sa_idx); + return -EINVAL; + } + + tsa = &ipsec->tx_tbl[sa_idx]; + + if (!tsa->used) + return 0; + + if (!(tsa->mode & IXGBE_RXTXMOD_VF) || + tsa->vf != vf) { + e_err(drv, "vf %d bad Tx SA index %d\n", vf, sa_idx); + return -ENOENT; + } + + xs = ipsec->tx_tbl[sa_idx].xs; + } + + ixgbe_ipsec_del_sa(xs); + + /* remove the xs that was made-up in the add request */ + kfree_sensitive(xs); + + return 0; +} + +/** + * ixgbe_ipsec_tx - setup Tx flags for ipsec offload + * @tx_ring: outgoing context + * @first: current data packet + * @itd: ipsec Tx data for later use in building context descriptor + **/ +int ixgbe_ipsec_tx(struct ixgbe_ring *tx_ring, + struct ixgbe_tx_buffer *first, + struct ixgbe_ipsec_tx_data *itd) +{ + struct ixgbe_adapter *adapter = netdev_priv(tx_ring->netdev); + struct ixgbe_ipsec *ipsec = adapter->ipsec; + struct xfrm_state *xs; + struct sec_path *sp; + struct tx_sa *tsa; + + sp = skb_sec_path(first->skb); + if (unlikely(!sp->len)) { + netdev_err(tx_ring->netdev, "%s: no xfrm state len = %d\n", + __func__, sp->len); + return 0; + } + + xs = xfrm_input_state(first->skb); + if (unlikely(!xs)) { + netdev_err(tx_ring->netdev, "%s: no xfrm_input_state() xs = %p\n", + __func__, xs); + return 0; + } + + itd->sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX; + if (unlikely(itd->sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT)) { + netdev_err(tx_ring->netdev, "%s: bad sa_idx=%d handle=%lu\n", + __func__, itd->sa_idx, xs->xso.offload_handle); + return 0; + } + + tsa = &ipsec->tx_tbl[itd->sa_idx]; + if (unlikely(!tsa->used)) { + netdev_err(tx_ring->netdev, "%s: unused sa_idx=%d\n", + __func__, itd->sa_idx); + return 0; + } + + first->tx_flags |= IXGBE_TX_FLAGS_IPSEC | IXGBE_TX_FLAGS_CC; + + if (xs->id.proto == IPPROTO_ESP) { + + itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_TYPE_ESP | + IXGBE_ADVTXD_TUCMD_L4T_TCP; + if (first->protocol == htons(ETH_P_IP)) + itd->flags |= IXGBE_ADVTXD_TUCMD_IPV4; + + /* The actual trailer length is authlen (16 bytes) plus + * 2 bytes for the proto and the padlen values, plus + * padlen bytes of padding. This ends up not the same + * as the static value found in xs->props.trailer_len (21). + * + * ... but if we're doing GSO, don't bother as the stack + * doesn't add a trailer for those. + */ + if (!skb_is_gso(first->skb)) { + /* The "correct" way to get the auth length would be + * to use + * authlen = crypto_aead_authsize(xs->data); + * but since we know we only have one size to worry + * about * we can let the compiler use the constant + * and save us a few CPU cycles. + */ + const int authlen = IXGBE_IPSEC_AUTH_BITS / 8; + struct sk_buff *skb = first->skb; + u8 padlen; + int ret; + + ret = skb_copy_bits(skb, skb->len - (authlen + 2), + &padlen, 1); + if (unlikely(ret)) + return 0; + itd->trailer_len = authlen + 2 + padlen; + } + } + if (tsa->encrypt) + itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_ENCRYPT_EN; + + return 1; +} + +/** + * ixgbe_ipsec_rx - decode ipsec bits from Rx descriptor + * @rx_ring: receiving ring + * @rx_desc: receive data descriptor + * @skb: current data packet + * + * Determine if there was an ipsec encapsulation noticed, and if so set up + * the resulting status for later in the receive stack. + **/ +void ixgbe_ipsec_rx(struct ixgbe_ring *rx_ring, + union ixgbe_adv_rx_desc *rx_desc, + struct sk_buff *skb) +{ + struct ixgbe_adapter *adapter = netdev_priv(rx_ring->netdev); + __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; + __le16 ipsec_pkt_types = cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH | + IXGBE_RXDADV_PKTTYPE_IPSEC_ESP); + struct ixgbe_ipsec *ipsec = adapter->ipsec; + struct xfrm_offload *xo = NULL; + struct xfrm_state *xs = NULL; + struct ipv6hdr *ip6 = NULL; + struct iphdr *ip4 = NULL; + struct sec_path *sp; + void *daddr; + __be32 spi; + u8 *c_hdr; + u8 proto; + + /* Find the ip and crypto headers in the data. + * We can assume no vlan header in the way, b/c the + * hw won't recognize the IPsec packet and anyway the + * currently vlan device doesn't support xfrm offload. + */ + if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV4)) { + ip4 = (struct iphdr *)(skb->data + ETH_HLEN); + daddr = &ip4->daddr; + c_hdr = (u8 *)ip4 + ip4->ihl * 4; + } else if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV6)) { + ip6 = (struct ipv6hdr *)(skb->data + ETH_HLEN); + daddr = &ip6->daddr; + c_hdr = (u8 *)ip6 + sizeof(struct ipv6hdr); + } else { + return; + } + + switch (pkt_info & ipsec_pkt_types) { + case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH): + spi = ((struct ip_auth_hdr *)c_hdr)->spi; + proto = IPPROTO_AH; + break; + case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_ESP): + spi = ((struct ip_esp_hdr *)c_hdr)->spi; + proto = IPPROTO_ESP; + break; + default: + return; + } + + xs = ixgbe_ipsec_find_rx_state(ipsec, daddr, proto, spi, !!ip4); + if (unlikely(!xs)) + return; + + sp = secpath_set(skb); + if (unlikely(!sp)) + return; + + sp->xvec[sp->len++] = xs; + sp->olen++; + xo = xfrm_offload(skb); + xo->flags = CRYPTO_DONE; + xo->status = CRYPTO_SUCCESS; + + adapter->rx_ipsec++; +} + +/** + * ixgbe_init_ipsec_offload - initialize security registers for IPSec operation + * @adapter: board private structure + **/ +void ixgbe_init_ipsec_offload(struct ixgbe_adapter *adapter) +{ + struct ixgbe_hw *hw = &adapter->hw; + struct ixgbe_ipsec *ipsec; + u32 t_dis, r_dis; + size_t size; + + if (hw->mac.type == ixgbe_mac_82598EB) + return; + + /* If there is no support for either Tx or Rx offload + * we should not be advertising support for IPsec. + */ + t_dis = IXGBE_READ_REG(hw, IXGBE_SECTXSTAT) & + IXGBE_SECTXSTAT_SECTX_OFF_DIS; + r_dis = IXGBE_READ_REG(hw, IXGBE_SECRXSTAT) & + IXGBE_SECRXSTAT_SECRX_OFF_DIS; + if (t_dis || r_dis) + return; + + ipsec = kzalloc(sizeof(*ipsec), GFP_KERNEL); + if (!ipsec) + goto err1; + hash_init(ipsec->rx_sa_list); + + size = sizeof(struct rx_sa) * IXGBE_IPSEC_MAX_SA_COUNT; + ipsec->rx_tbl = kzalloc(size, GFP_KERNEL); + if (!ipsec->rx_tbl) + goto err2; + + size = sizeof(struct tx_sa) * IXGBE_IPSEC_MAX_SA_COUNT; + ipsec->tx_tbl = kzalloc(size, GFP_KERNEL); + if (!ipsec->tx_tbl) + goto err2; + + size = sizeof(struct rx_ip_sa) * IXGBE_IPSEC_MAX_RX_IP_COUNT; + ipsec->ip_tbl = kzalloc(size, GFP_KERNEL); + if (!ipsec->ip_tbl) + goto err2; + + ipsec->num_rx_sa = 0; + ipsec->num_tx_sa = 0; + + adapter->ipsec = ipsec; + ixgbe_ipsec_stop_engine(adapter); + ixgbe_ipsec_clear_hw_tables(adapter); + + adapter->netdev->xfrmdev_ops = &ixgbe_xfrmdev_ops; + + return; + +err2: + kfree(ipsec->ip_tbl); + kfree(ipsec->rx_tbl); + kfree(ipsec->tx_tbl); + kfree(ipsec); +err1: + netdev_err(adapter->netdev, "Unable to allocate memory for SA tables"); +} + +/** + * ixgbe_stop_ipsec_offload - tear down the ipsec offload + * @adapter: board private structure + **/ +void ixgbe_stop_ipsec_offload(struct ixgbe_adapter *adapter) +{ + struct ixgbe_ipsec *ipsec = adapter->ipsec; + + adapter->ipsec = NULL; + if (ipsec) { + kfree(ipsec->ip_tbl); + kfree(ipsec->rx_tbl); + kfree(ipsec->tx_tbl); + kfree(ipsec); + } +} |