net/mlx5e: Fix traffic being dropped on VF representor

[ Upstream commit 4246f698dd58e3c6246fa919ef0b0a1d29a57e4a ]

Increase representor netdev RQ size to avoid dropped packets.
The current size (two) is just too small to keep up with
conventional slow path traffic patterns.
Also match the SQ size to the RQ size.

Fixes: cb67b832921c ("net/mlx5e: Introduce SRIOV VF representors")
Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index f78148ffb0ba896b98e0dc0be670371afef3cefd..dfa8c6a28a6c1169c5143c8eb81d98239b4c5341 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -44,6 +44,11 @@
 #include "en_tc.h"
 #include "fs_core.h"
 
+#define MLX5E_REP_PARAMS_LOG_SQ_SIZE \
+       max(0x6, MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE)
+#define MLX5E_REP_PARAMS_LOG_RQ_SIZE \
+       max(0x6, MLX5E_PARAMS_MINIMUM_LOG_RQ_SIZE)
+
 static const char mlx5e_rep_driver_name[] = "mlx5e_rep";
 
 static void mlx5e_rep_get_drvinfo(struct net_device *dev,
@@ -824,9 +829,9 @@ static void mlx5e_build_rep_params(struct mlx5_core_dev *mdev,
                                         MLX5_CQ_PERIOD_MODE_START_FROM_CQE :
                                         MLX5_CQ_PERIOD_MODE_START_FROM_EQE;
 
-       params->log_sq_size = MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE;
+       params->log_sq_size = MLX5E_REP_PARAMS_LOG_SQ_SIZE;
        params->rq_wq_type  = MLX5_WQ_TYPE_LINKED_LIST;
-       params->log_rq_size = MLX5E_PARAMS_MINIMUM_LOG_RQ_SIZE;
+       params->log_rq_size = MLX5E_REP_PARAMS_LOG_RQ_SIZE;
 
        params->rx_am_enabled = MLX5_CAP_GEN(mdev, cq_moderation);
        mlx5e_set_rx_cq_mode_params(params, cq_period_mode);