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ixgbe: restore offloaded SAs after a reset

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On a chip reset most of the table contents are lost, so must be
restored.  This scans the driver's ipsec tables and restores both
the filled and empty table slots to their pre-reset values.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Shannon Nelson
2017-12-19 15:59:58 -08:00
committed by Jeff Kirsher
parent 63a67fe229
commit 6d73a1540b
3 changed files with 44 additions and 0 deletions
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41
drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
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@@ -298,6 +298,47 @@ static void ixgbe_ipsec_start_engine(struct ixgbe_adapter *adapter)
IXGBE_WRITE_FLUSH(hw);
}
/**
* ixgbe_ipsec_restore - restore the ipsec HW settings after a reset
* @adapter: board private structure
**/
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 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);
}
/* reload the Rx and Tx keys */
for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) {
struct rx_sa *rsa = &ipsec->rx_tbl[i];
struct tx_sa *tsa = &ipsec->tx_tbl[i];
if (rsa->used)
ixgbe_ipsec_set_rx_sa(hw, i, rsa->xs->id.spi,
rsa->key, rsa->salt,
rsa->mode, rsa->iptbl_ind);
if (tsa->used)
ixgbe_ipsec_set_tx_sa(hw, i, tsa->key, tsa->salt);
}
}
/**
* ixgbe_ipsec_find_empty_idx - find the first unused security parameter index
* @ipsec: pointer to ipsec struct