From cb9cb61e547b50552c82151b9a4aeefd5acda796 Mon Sep 17 00:00:00 2001 From: Viacheslav Ovsiienko Date: Sun, 21 Jul 2019 14:25:00 +0000 Subject: [PATCH] net/mlx5: report max number of mbuf segments 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 Acked-by: Yongseok Koh --- 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 738d540f5a..6c9bcf13f3 100644 --- a/drivers/net/mlx5/mlx5_ethdev.c +++ b/drivers/net/mlx5/mlx5_ethdev.c @@ -591,6 +591,42 @@ mlx5_set_default_params(struct rte_eth_dev *dev, struct rte_eth_dev_info *info) } } +/** + * 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. * @@ -634,6 +670,7 @@ mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info) 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; -- 2.20.1