[net-next v0 11/14] net/mlx5e: Allow profile-specific limitation on max num of channels
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From: Saeed Mahameed <saeed@kernel.org>
Date: 2021-12-22 03:16:27
Subsystem:
mellanox ethernet driver (mlx5e), mellanox mlx5 core vpi driver, networking drivers, the rest · Maintainers:
Saeed Mahameed, Tariq Toukan, Mark Bloch, Leon Romanovsky, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Tariq Toukan <tariqt@nvidia.com> Let SF/VF representor's netdev use profile-specific limitation on max_nch to reduce its memory and HW resources consumption. This is particularly important for environments with limited memory and high number of SFs. Signed-off-by: Tariq Toukan <tariqt@nvidia.com> Signed-off-by: Vu Pham <redacted> Reviewed-by: Moshe Shemesh <redacted> Reviewed-by: Parav Pandit <redacted> Signed-off-by: Saeed Mahameed <saeedm@nvidia.com> --- drivers/net/ethernet/mellanox/mlx5/core/en.h | 1 + .../net/ethernet/mellanox/mlx5/core/en_main.c | 18 +++++++++++++++--- .../net/ethernet/mellanox/mlx5/core/en_rep.c | 7 +++++++ 3 files changed, 23 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 14497b4adc6a..c2812513434a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h@@ -972,6 +972,7 @@ struct mlx5e_profile { int (*update_rx)(struct mlx5e_priv *priv); void (*update_stats)(struct mlx5e_priv *priv); void (*update_carrier)(struct mlx5e_priv *priv); + int (*max_nch_limit)(struct mlx5_core_dev *mdev); unsigned int (*stats_grps_num)(struct mlx5e_priv *priv); mlx5e_stats_grp_t *stats_grps; const struct mlx5e_rx_handlers *rx_handlers;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 75984ed262dc..e4a79ba031e9 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c@@ -5098,6 +5098,18 @@ static const struct mlx5e_profile mlx5e_nic_profile = { BIT(MLX5E_PROFILE_FEATURE_QOS_HTB), }; +static int mlx5e_profile_max_num_channels(struct mlx5_core_dev *mdev, + const struct mlx5e_profile *profile) +{ + int nch; + + nch = mlx5e_get_max_num_channels(mdev); + + if (profile->max_nch_limit) + nch = min_t(int, nch, profile->max_nch_limit(mdev)); + return nch; +} + static unsigned int mlx5e_calc_max_nch(struct mlx5_core_dev *mdev, struct net_device *netdev, const struct mlx5e_profile *profile)
@@ -5106,7 +5118,7 @@ mlx5e_calc_max_nch(struct mlx5_core_dev *mdev, struct net_device *netdev, unsigned int max_nch, tmp; /* core resources */ - max_nch = mlx5e_get_max_num_channels(mdev); + max_nch = mlx5e_profile_max_num_channels(mdev, profile); /* netdev rx queues */ tmp = netdev->num_rx_queues / max_t(u8, profile->rq_groups, 1);
@@ -5235,7 +5247,7 @@ static unsigned int mlx5e_get_max_num_txqs(struct mlx5_core_dev *mdev, { unsigned int nch, ptp_txqs, qos_txqs; - nch = mlx5e_get_max_num_channels(mdev); + nch = mlx5e_profile_max_num_channels(mdev, profile); ptp_txqs = MLX5_CAP_GEN(mdev, ts_cqe_to_dest_cqn) && mlx5e_profile_feature_cap(profile, PTP_TX) ?
@@ -5253,7 +5265,7 @@ static unsigned int mlx5e_get_max_num_rxqs(struct mlx5_core_dev *mdev, { unsigned int nch; - nch = mlx5e_get_max_num_channels(mdev); + nch = mlx5e_profile_max_num_channels(mdev, profile); return nch * profile->rq_groups; }
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index 0bd3721c9110..8c0f4cfbe471 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c@@ -591,6 +591,12 @@ bool mlx5e_eswitch_vf_rep(const struct net_device *netdev) return netdev->netdev_ops == &mlx5e_netdev_ops_rep; } +static int mlx5e_rep_max_nch_limit(struct mlx5_core_dev *mdev) +{ + return (1 << MLX5_CAP_GEN(mdev, log_max_tir)) / + mlx5_eswitch_get_total_vports(mdev); +} + static void mlx5e_build_rep_params(struct net_device *netdev) { struct mlx5e_priv *priv = netdev_priv(netdev);
@@ -1113,6 +1119,7 @@ static const struct mlx5e_profile mlx5e_rep_profile = { .rq_groups = MLX5E_NUM_RQ_GROUPS(REGULAR), .stats_grps = mlx5e_rep_stats_grps, .stats_grps_num = mlx5e_rep_stats_grps_num, + .max_nch_limit = mlx5e_rep_max_nch_limit, }; static const struct mlx5e_profile mlx5e_uplink_rep_profile = {
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2.33.1