[PATCH net-next] net/mlx5e: Add hds-thresh query support via ethtool
From: Tariq Toukan <tariqt@nvidia.com>
Date: 2026-03-17 10:50:18
Also in:
linux-rdma, lkml
Subsystem:
mellanox ethernet driver (mlx5e), mellanox mlx5 core vpi driver, networking drivers, the rest · Maintainers:
Saeed Mahameed, Tariq Toukan, Mark Bloch, Leon Romanovsky, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Nimrod Oren <redacted> Add support for reporting HDS (Header-Data Split) threshold via ethtool. When applicable, mlx5 hardware splits packets of all sizes with no configurable threshold, so report both hds-thresh and hds-thresh-max as 0 (i.e. always split regardless of size). Signed-off-by: Nimrod Oren <redacted> Reviewed-by: Carolina Jubran <redacted> Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com> Signed-off-by: Tariq Toukan <tariqt@nvidia.com> --- drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index 4a8dc85d5924..bb61e2179078 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c@@ -371,6 +371,9 @@ void mlx5e_ethtool_get_ringparam(struct mlx5e_priv *priv, param->tx_max_pending = 1 << MLX5E_PARAMS_MAXIMUM_LOG_SQ_SIZE; param->rx_pending = 1 << priv->channels.params.log_rq_mtu_frames; param->tx_pending = 1 << priv->channels.params.log_sq_size; + + kernel_param->hds_thresh = 0; + kernel_param->hds_thresh_max = 0; } static void mlx5e_get_ringparam(struct net_device *dev,
@@ -2735,7 +2738,8 @@ const struct ethtool_ops mlx5e_ethtool_ops = { ETHTOOL_COALESCE_USE_ADAPTIVE | ETHTOOL_COALESCE_USE_CQE, .supported_input_xfrm = RXH_XFRM_SYM_OR_XOR, - .supported_ring_params = ETHTOOL_RING_USE_TCP_DATA_SPLIT, + .supported_ring_params = ETHTOOL_RING_USE_TCP_DATA_SPLIT | + ETHTOOL_RING_USE_HDS_THRS, .get_drvinfo = mlx5e_get_drvinfo, .get_link = ethtool_op_get_link, .get_link_ext_state = mlx5e_get_link_ext_state,
base-commit: 348baefbb635cbb448e154f38c93657d4cf23936 -- 2.44.0