net/mlx5e: Update xoff formula (5ec983e9) · Commits · 戴 / test

Set minimum speed in xoff threshold formula to 40Gbps Fixes: ("net/mlx5e: Receive buffer configuration") Signed-off-by:

drivers/net/ethernet/mellanox/mlx5/core/en/port_buffer.c

+6 −5

Original line number	Diff line number	Diff line
		@@ -122,7 +122,9 @@ out:
		return err;
		}

		/* xoff = ((301+2.16 * len [m]) * speed [Gbps] + 2.72 MTU [B]) */
		/* xoff = ((301+2.16 * len [m]) * speed [Gbps] + 2.72 MTU [B])
		* minimum speed value is 40Gbps
		*/
		static u32 calculate_xoff(struct mlx5e_priv *priv, unsigned int mtu)
		{
		u32 speed;
		@@ -130,10 +132,9 @@ static u32 calculate_xoff(struct mlx5e_priv *priv, unsigned int mtu)
		int err;

		err = mlx5e_port_linkspeed(priv->mdev, &speed);
		if (err) {
		mlx5_core_warn(priv->mdev, "cannot get port speed\n");
		return 0;
		}
		if (err)
		speed = SPEED_40000;
		speed = max_t(u32, speed, SPEED_40000);

		xoff = (301 + 216 * priv->dcbx.cable_len / 100) * speed / 1000 + 272 * mtu / 100;