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net/mlx5e: Set hairpin queue size

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For a given hairpin packet buffer size, different queue sizes
(values of log_hairpin_num_packets) determine how the data is broken
to strides on the RQ. Currently the chosen value is set to 64B strides.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Or Gerlitz 2018-01-04 12:47:19 +02:00 committed by Saeed Mahameed
parent 4d533e0f86
commit eb9180f792
1 changed files with 8 additions and 3 deletions
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11
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
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@ -599,8 +599,13 @@ static int mlx5e_hairpin_flow_add(struct mlx5e_priv *priv,
MLX5_CAP_GEN(priv->mdev, log_max_hairpin_wq_data_sz));
params.log_data_size = max_t(u8, params.log_data_size,
MLX5_CAP_GEN(priv->mdev, log_min_hairpin_wq_data_sz));
params.q_counter = priv->q_counter;
params.log_num_packets = params.log_data_size -
MLX5_MPWRQ_MIN_LOG_STRIDE_SZ(priv->mdev);
params.log_num_packets = min_t(u8, params.log_num_packets,
MLX5_CAP_GEN(priv->mdev, log_max_hairpin_num_packets));
params.q_counter = priv->q_counter;
/* set hairpin pair per each 50Gbs share of the link */
mlx5e_get_max_linkspeed(priv->mdev, &link_speed);
link_speed = max_t(u32, link_speed, 50000);
@ -614,9 +619,9 @@ static int mlx5e_hairpin_flow_add(struct mlx5e_priv *priv,
goto create_hairpin_err;
}
netdev_dbg(priv->netdev, "add hairpin: tirn %x rqn %x peer %s sqn %x prio %d log data size %d\n",
netdev_dbg(priv->netdev, "add hairpin: tirn %x rqn %x peer %s sqn %x prio %d (log) data %d packets %d\n",
hp->tirn, hp->pair->rqn[0], hp->pair->peer_mdev->priv.name,
hp->pair->sqn[0], match_prio, params.log_data_size);
hp->pair->sqn[0], match_prio, params.log_data_size, params.log_num_packets);
hpe->hp = hp;
hash_add(priv->fs.tc.hairpin_tbl, &hpe->hairpin_hlist,