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>

2 files changed, 21 insertions, 4 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
index e15a1fb4cd14..72901ce2b088 100644
--- 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 35003ada04ec..bfcfd8ae5f73 100644
--- 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 */