ixgbe: register ipsec offload with the xfrm subsystem

With all the support code in place we can now link in the ipsec
offload operations and set the ESP feature flag for the XFRM
subsystem to see.

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>

2 files changed, 23 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
index c25b0bb2c4e6..93eacddb6704 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
@@ -718,10 +718,23 @@ static bool ixgbe_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs)
         return true;
 }
 
+/**
+ * ixgbe_ipsec_free - called by xfrm garbage collections
+ * @xs: pointer to transformer state struct
+ *
+ * We don't have any garbage to collect, so we shouldn't bother
+ * implementing this function, but the XFRM code doesn't check for
+ * existence before calling the API callback.
+ **/
+static void ixgbe_ipsec_free(struct xfrm_state *xs)
+{
+}
+
 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,
+        .xdo_dev_state_free = ixgbe_ipsec_free,
 };
 
 /**
@@ -895,6 +908,10 @@ void ixgbe_init_ipsec_offload(struct ixgbe_adapter *adapter)
         ixgbe_ipsec_stop_engine(adapter);
         ixgbe_ipsec_clear_hw_tables(adapter);
 
+        adapter->netdev->xfrmdev_ops = &ixgbe_xfrmdev_ops;
+        adapter->netdev->features |= NETIF_F_HW_ESP;
+        adapter->netdev->hw_enc_features |= NETIF_F_HW_ESP;
+
         return;
 
 err2:
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 58b36ce35b28..722cc3153a99 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -9895,6 +9895,12 @@ ixgbe_features_check(struct sk_buff *skb, struct net_device *dev,
         if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
                 features &= ~NETIF_F_TSO;
 
+#ifdef CONFIG_XFRM_OFFLOAD
+        /* IPsec offload doesn't get along well with others *yet* */
+        if (skb->sp)
+                features &= ~(NETIF_F_TSO | NETIF_F_HW_CSUM);
+#endif
+
         return features;
 }