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net/mlx5e: Add hds-thresh query support via ethtool

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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 <noren@nvidia.com>
Reviewed-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Joe Damato <joe@dama.to>
Link: https://patch.msgid.link/20260317104934.16124-1-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Nimrod Oren 2026-03-17 12:49:34 +02:00 committed by Jakub Kicinski
parent c3f25894e3
commit d347b28c49
1 changed files with 5 additions and 1 deletions
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6
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
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@ -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,