mlx4_en: Added Ethtool support for TX Interrupt coalescing

[karo-tx-linux.git] / drivers / net / ethernet / mellanox / mlx4 / en_ethtool.c

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
index e15a1fb4cd1432d16e37cd9c9aaa2c79248eb0ea..72901ce2b088cc764a2b5005592108e660565214 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
@@ -359,8 +359,8 @@ static int mlx4_en_get_coalesce(struct net_device *dev,
 {
        struct mlx4_en_priv *priv = netdev_priv(dev);
 
-       coal->tx_coalesce_usecs = 0;
-       coal->tx_max_coalesced_frames = 0;
+       coal->tx_coalesce_usecs = priv->tx_usecs;
+       coal->tx_max_coalesced_frames = priv->tx_frames;
        coal->rx_coalesce_usecs = priv->rx_usecs;
        coal->rx_max_coalesced_frames = priv->rx_frames;
 
@@ -388,6 +388,21 @@ static int mlx4_en_set_coalesce(struct net_device *dev,
                                MLX4_EN_RX_COAL_TIME :
                                coal->rx_coalesce_usecs;
 
+       /* Setting TX coalescing parameters */
+       if (coal->tx_coalesce_usecs != priv->tx_usecs ||
+           coal->tx_max_coalesced_frames != priv->tx_frames) {
+               priv->tx_usecs = coal->tx_coalesce_usecs;
+               priv->tx_frames = coal->tx_max_coalesced_frames;
+               for (i = 0; i < priv->tx_ring_num; i++) {
+                       priv->tx_cq[i].moder_cnt = priv->tx_frames;
+                       priv->tx_cq[i].moder_time = priv->tx_usecs;
+                       if (mlx4_en_set_cq_moder(priv, &priv->tx_cq[i])) {
+                               en_warn(priv, "Failed changing moderation "
+                                             "for TX cq %d\n", i);
+                       }
+               }
+       }
+
        /* Set adaptive coalescing params */
        priv->pkt_rate_low = coal->pkt_rate_low;
        priv->rx_usecs_low = coal->rx_coalesce_usecs_low;