ixgbevf: Add the appropriate ethtool ops to query RSS indirection table and key

Added get_rxfh_indir_size, get_rxfh_key_size and get_rxfh ethtool_ops
callbacks implementations.

This enables the ethtool's "-x" and "--show-rxfh[-indir]" options for VF
devices.

This patch adds the support for 82599 and x540 devices only. Support for
other devices will be added later.

Signed-off-by: Vlad Zolotarov <vladz@cloudius-systems.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ixgbevf/ethtool.c b/drivers/net/ethernet/intel/ixgbevf/ethtool.c
index e83c85b..b2f5b16 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbevf/ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ethtool.c
@@ -794,6 +794,71 @@ static int ixgbevf_set_coalesce(struct net_device *netdev,
        return 0;
 }
 
+static int ixgbevf_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info,
+                            u32 *rules __always_unused)
+{
+       struct ixgbevf_adapter *adapter = netdev_priv(dev);
+
+       switch (info->cmd) {
+       case ETHTOOL_GRXRINGS:
+               info->data = adapter->num_rx_queues;
+               return 0;
+       default:
+               hw_dbg(&adapter->hw, "Command parameters not supported\n");
+               return -EOPNOTSUPP;
+       }
+}
+
+static u32 ixgbevf_get_rxfh_indir_size(struct net_device *netdev)
+{
+       struct ixgbevf_adapter *adapter = netdev_priv(netdev);
+
+       /* We support this operation only for 82599 and x540 at the moment */
+       if (adapter->hw.mac.type < ixgbe_mac_X550_vf)
+               return IXGBEVF_82599_RETA_SIZE;
+
+       return 0;
+}
+
+static u32 ixgbevf_get_rxfh_key_size(struct net_device *netdev)
+{
+       struct ixgbevf_adapter *adapter = netdev_priv(netdev);
+
+       /* We support this operation only for 82599 and x540 at the moment */
+       if (adapter->hw.mac.type < ixgbe_mac_X550_vf)
+               return IXGBEVF_RSS_HASH_KEY_SIZE;
+
+       return 0;
+}
+
+static int ixgbevf_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
+                           u8 *hfunc)
+{
+       struct ixgbevf_adapter *adapter = netdev_priv(netdev);
+       int err = 0;
+
+       if (hfunc)
+               *hfunc = ETH_RSS_HASH_TOP;
+
+       /* If neither indirection table nor hash key was requested - just
+        * return a success avoiding taking any locks.
+        */
+       if (!indir && !key)
+               return 0;
+
+       spin_lock_bh(&adapter->mbx_lock);
+       if (indir)
+               err = ixgbevf_get_reta_locked(&adapter->hw, indir,
+                                             adapter->num_rx_queues);
+
+       if (!err && key)
+               err = ixgbevf_get_rss_key_locked(&adapter->hw, key);
+
+       spin_unlock_bh(&adapter->mbx_lock);
+
+       return err;
+}
+
 static const struct ethtool_ops ixgbevf_ethtool_ops = {
        .get_settings           = ixgbevf_get_settings,
        .get_drvinfo            = ixgbevf_get_drvinfo,
@@ -811,6 +876,10 @@ static const struct ethtool_ops ixgbevf_ethtool_ops = {
        .get_ethtool_stats      = ixgbevf_get_ethtool_stats,
        .get_coalesce           = ixgbevf_get_coalesce,
        .set_coalesce           = ixgbevf_set_coalesce,
+       .get_rxnfc              = ixgbevf_get_rxnfc,
+       .get_rxfh_indir_size    = ixgbevf_get_rxfh_indir_size,
+       .get_rxfh_key_size      = ixgbevf_get_rxfh_key_size,
+       .get_rxfh               = ixgbevf_get_rxfh,
 };
 
 void ixgbevf_set_ethtool_ops(struct net_device *netdev)