> \On Jul 21, 2019, at 7:25 AM, Viacheslav Ovsiienko <viachesl...@mellanox.com>
> wrote:
>
> This patch fills the tx_desc_lim.nb_seg_max and
> tx_desc_lim.nb_mtu_seg_max fields of rte_eth_dev_info
> structure to report thee maximal number of packet
> segments, requested inline data configuration is
> taken into account in conservative way.
>
> Signed-off-by: Viacheslav Ovsiienko <viachesl...@mellanox.com>
> ---
Acked-by: Yongseok Koh <ys...@mellanox.com>
> drivers/net/mlx5/mlx5_ethdev.c | 37 +++++++++++++++++++++++++++++++++++++
> 1 file changed, 37 insertions(+)
>
> diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
> index 738d540..6c9bcf1 100644
> --- a/drivers/net/mlx5/mlx5_ethdev.c
> +++ b/drivers/net/mlx5/mlx5_ethdev.c
> @@ -592,6 +592,42 @@ struct ethtool_link_settings {
> }
>
> /**
> + * Sets tx mbuf limiting parameters.
> + *
> + * @param dev
> + * Pointer to Ethernet device.
> + * @param[out] info
> + * Info structure output buffer.
> + */
> +static void
> +mlx5_set_txlimit_params(struct rte_eth_dev *dev, struct rte_eth_dev_info
> *info)
> +{
> + struct mlx5_priv *priv = dev->data->dev_private;
> + struct mlx5_dev_config *config = &priv->config;
> + unsigned int inlen;
> + uint16_t nb_max;
> +
> + inlen = (config->txq_inline_max == MLX5_ARG_UNSET) ?
> + MLX5_SEND_DEF_INLINE_LEN :
> + (unsigned int)config->txq_inline_max;
> + assert(config->txq_inline_min >= 0);
> + inlen = RTE_MAX(inlen, (unsigned int)config->txq_inline_min);
> + inlen = RTE_MIN(inlen, MLX5_WQE_SIZE_MAX +
> + MLX5_ESEG_MIN_INLINE_SIZE -
> + MLX5_WQE_CSEG_SIZE -
> + MLX5_WQE_ESEG_SIZE -
> + MLX5_WQE_DSEG_SIZE * 2);
> + nb_max = (MLX5_WQE_SIZE_MAX +
> + MLX5_ESEG_MIN_INLINE_SIZE -
> + MLX5_WQE_CSEG_SIZE -
> + MLX5_WQE_ESEG_SIZE -
> + MLX5_WQE_DSEG_SIZE -
> + inlen) / MLX5_WSEG_SIZE;
> + info->tx_desc_lim.nb_seg_max = nb_max;
> + info->tx_desc_lim.nb_mtu_seg_max = nb_max;
> +}
> +
> +/**
> * DPDK callback to get information about the device.
> *
> * @param dev
> @@ -634,6 +670,7 @@ struct ethtool_link_settings {
> info->speed_capa = priv->link_speed_capa;
> info->flow_type_rss_offloads = ~MLX5_RSS_HF_MASK;
> mlx5_set_default_params(dev, info);
> + mlx5_set_txlimit_params(dev, info);
> info->switch_info.name = dev->data->name;
> info->switch_info.domain_id = priv->domain_id;
> info->switch_info.port_id = priv->representor_id;
> --
> 1.8.3.1
>
