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>

1 files changed, 69 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ixgbevf/ethtool.c b/drivers/net/ethernet/intel/ixgbevf/ethtool.c
index e83c85bf2602..b2f5b161d792 100644
--- 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)