From: Moshe Tal moshet@nvidia.com
[ Upstream commit 6d0ba49321a40a8dada22c223bbe91c063b08db4 ]
Correct the calculation of maximum channels of rep to better utilize the hardware resources and allow a larger scale of reps.
This will allow creation of all virtual ports configured.
Fixes: 473baf2e9e8c ("net/mlx5e: Allow profile-specific limitation on max num of channels") Signed-off-by: Moshe Tal moshet@nvidia.com Reviewed-by: Tariq Toukan tariqt@nvidia.com Signed-off-by: Saeed Mahameed saeedm@nvidia.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/mellanox/mlx5/core/en.h | 1 + drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 9 +++++++++ drivers/net/ethernet/mellanox/mlx5/core/en_rep.c | 10 ++++++++-- 3 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h index c14e06ca64d8..5ccd6c634274 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h @@ -1188,6 +1188,7 @@ mlx5e_tx_mpwqe_supported(struct mlx5_core_dev *mdev) MLX5_CAP_ETH(mdev, enhanced_multi_pkt_send_wqe); }
+int mlx5e_get_pf_num_tirs(struct mlx5_core_dev *mdev); int mlx5e_priv_init(struct mlx5e_priv *priv, const struct mlx5e_profile *profile, struct net_device *netdev, diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index 3500faf08671..531fffe1abe3 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -5206,6 +5206,15 @@ mlx5e_calc_max_nch(struct mlx5_core_dev *mdev, struct net_device *netdev, return max_nch; }
+int mlx5e_get_pf_num_tirs(struct mlx5_core_dev *mdev) +{ + /* Indirect TIRS: 2 sets of TTCs (inner + outer steering) + * and 1 set of direct TIRS + */ + return 2 * MLX5E_NUM_INDIR_TIRS + + mlx5e_profile_max_num_channels(mdev, &mlx5e_nic_profile); +} + /* mlx5e generic netdev management API (move to en_common.c) */ int mlx5e_priv_init(struct mlx5e_priv *priv, const struct mlx5e_profile *profile, diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c index 06d1f46f1688..f6a1c5efdb25 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c @@ -592,10 +592,16 @@ bool mlx5e_eswitch_vf_rep(const struct net_device *netdev) return netdev->netdev_ops == &mlx5e_netdev_ops_rep; }
+/* One indirect TIR set for outer. Inner not supported in reps. */ +#define REP_NUM_INDIR_TIRS MLX5E_NUM_INDIR_TIRS + 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); + int max_tir_num = 1 << MLX5_CAP_GEN(mdev, log_max_tir); + int num_vports = mlx5_eswitch_get_total_vports(mdev); + + return (max_tir_num - mlx5e_get_pf_num_tirs(mdev) + - (num_vports * REP_NUM_INDIR_TIRS)) / num_vports; }
static void mlx5e_build_rep_params(struct net_device *netdev)