mlx4_en: Added Ethtool support for TX Interrupt coalescing

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
index e15a1fb..72901ce 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;

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index 35003ad..bfcfd8a 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -429,6 +429,8 @@ static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
         */
        priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
        priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
+       priv->tx_frames = MLX4_EN_TX_COAL_PKTS;
+       priv->tx_usecs = MLX4_EN_TX_COAL_TIME;
        en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
                           "rx_frames:%d rx_usecs:%d\n",
                 priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
@@ -445,8 +447,8 @@ static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
 
        for (i = 0; i < priv->tx_ring_num; i++) {
                cq = &priv->tx_cq[i];
-               cq->moder_cnt = MLX4_EN_TX_COAL_PKTS;
-               cq->moder_time = MLX4_EN_TX_COAL_TIME;
+               cq->moder_cnt = priv->tx_frames;
+               cq->moder_time = priv->tx_usecs;
        }
 
        /* Reset auto-moderation params */