net/mlx5: fix maximum LRO message size

[ upstream commit a236400 ]

The PMD analyzes each Rx queue maximal LRO size and selects one that
fits all queues to configure TIR LRO attribute.
TIR LRO attribute is number of 256 bytes chunks that match the
selected maximal LRO size.

PMD used `priv->max_lro_msg_size` for selected maximal LRO size and
number of TIR chunks.

Fixes: b9f1f4c ("net/mlx5: fix port initialization with small LRO")

Signed-off-by: Gregory Etelson <getelson@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>

drivers/net/mlx5/mlx5.h

@@ -1452,7 +1452,7 @@ struct mlx5_priv {
 	uint32_t refcnt; /**< Reference counter. */
 	/**< Verbs modify header action object. */
 	uint8_t ft_type; /**< Flow table type, Rx or Tx. */
-	uint8_t max_lro_msg_size;
+	uint32_t max_lro_msg_size;
 	uint32_t link_speed_capa; /* Link speed capabilities. */
 	struct mlx5_xstats_ctrl xstats_ctrl; /* Extended stats control. */
 	struct mlx5_stats_ctrl stats_ctrl; /* Stats control. */

drivers/net/mlx5/mlx5_devx.c

@@ -771,7 +771,8 @@ mlx5_devx_tir_attr_set(struct rte_eth_dev *dev, const uint8_t *rss_key,
 	if (lro) {
 		MLX5_ASSERT(priv->config.lro.supported);
 		tir_attr->lro_timeout_period_usecs = priv->config.lro.timeout;
-		tir_attr->lro_max_msg_sz = priv->max_lro_msg_size;
+		tir_attr->lro_max_msg_sz =
+			priv->max_lro_msg_size / MLX5_LRO_SEG_CHUNK_SIZE;
 		tir_attr->lro_enable_mask =
 				MLX5_TIRC_LRO_ENABLE_MASK_IPV4_LRO |
 				MLX5_TIRC_LRO_ENABLE_MASK_IPV6_LRO;

drivers/net/mlx5/mlx5_rxq.c

@@ -1534,16 +1534,14 @@ mlx5_max_lro_msg_size_adjust(struct rte_eth_dev *dev, uint16_t idx,
 	    MLX5_MAX_TCP_HDR_OFFSET)
 		max_lro_size -= MLX5_MAX_TCP_HDR_OFFSET;
 	max_lro_size = RTE_MIN(max_lro_size, MLX5_MAX_LRO_SIZE);
-	max_lro_size /= MLX5_LRO_SEG_CHUNK_SIZE;
 	if (priv->max_lro_msg_size)
 		priv->max_lro_msg_size =
 			RTE_MIN((uint32_t)priv->max_lro_msg_size, max_lro_size);
 	else
 		priv->max_lro_msg_size = max_lro_size;
 	DRV_LOG(DEBUG,
 		"port %u Rx Queue %u max LRO message size adjusted to %u bytes",
-		dev->data->port_id, idx,
-		priv->max_lro_msg_size * MLX5_LRO_SEG_CHUNK_SIZE);
+		dev->data->port_id, idx, priv->max_lro_msg_size);
 }
 
 /**