From c34c17861ab1d367fb4e5ceca449b9929d6de836 Mon Sep 17 00:00:00 2001 From: Tariq Toukan Date: Wed, 22 Feb 2017 17:20:14 +0200 Subject: [PATCH] net/mlx5e: Fix broken CQE compression initialization [ Upstream commit b0d4660b4cc52e6477ca3a43435351d565dfcedc ] Some of RQ type parameters are derived from CQE compression state flag, CQE compression flag was initialized only after RQ type parameters setup. This leads to load RQ with stride size smaller than what we want for when CQE compression is on. This bug introduces no functional damage, it only makes CQE compression occur less often, since in ConnectX4-LX CQE compression is performed only on packets smaller than stride size. Fix this by marking default status of CQE compression in PFLAG prior to calling mlx5e_set_rq_priv_params(), as it inits some fields based on it. Tested: load driver on systems where rx CQE compress will be on (MH) pktgen with 64 < pkt size < 256 and netperf TCP_STREAM (IPv4/IPv6) verify `ethtool -S ethxx | grep compress` are advancing more often (rapidly) Fixes: 2fc4bfb7250d ("net/mlx5e: Dynamic RQ type infrastructure") Signed-off-by: Tariq Toukan Cc: kernel-team@fb.com Signed-off-by: Saeed Mahameed Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index 7a2b87cba752b..a2401edc88787 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -3500,6 +3500,9 @@ static void mlx5e_build_nic_netdev_priv(struct mlx5_core_dev *mdev, cqe_compress_heuristic(link_speed, pci_bw); } + MLX5E_SET_PFLAG(priv, MLX5E_PFLAG_RX_CQE_COMPRESS, + priv->params.rx_cqe_compress_def); + mlx5e_set_rq_priv_params(priv); if (priv->params.rq_wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ) priv->params.lro_en = true; @@ -3525,7 +3528,6 @@ static void mlx5e_build_nic_netdev_priv(struct mlx5_core_dev *mdev, /* Initialize pflags */ MLX5E_SET_PFLAG(priv, MLX5E_PFLAG_RX_CQE_BASED_MODER, priv->params.rx_cq_period_mode == MLX5_CQ_PERIOD_MODE_START_FROM_CQE); - MLX5E_SET_PFLAG(priv, MLX5E_PFLAG_RX_CQE_COMPRESS, priv->params.rx_cqe_compress_def); mutex_init(&priv->state_lock); -- 2.47.2