Query additional QoS packet pacing capabilities from HCA attributes: - packet_pacing_burst_bound: HW supports burst_upper_bound parameter - packet_pacing_typical_size: HW supports typical_packet_size parameter - packet_pacing_max_rate / packet_pacing_min_rate: rate range in kbps - packet_pacing_rate_table_size: number of HW rate table entries
These capabilities are needed by the upcoming per-queue rate limiting feature to validate devarg values and report HW limits. Supported hardware: - ConnectX-6 Dx and later (different boards expose different subsets) - ConnectX-5 reports packet_pacing but not all extended fields - ConnectX-7/8 report the full capability set - BlueField-2 and later DPUs also report these capabilities Not supported: - ConnectX-4 Lx and earlier (no packet_pacing capability at all) - ConnectX-5 Ex may not report burst_bound or typical_size Signed-off-by: Vincent Jardin <[email protected]> --- drivers/common/mlx5/mlx5_devx_cmds.c | 15 +++++++++++++++ drivers/common/mlx5/mlx5_devx_cmds.h | 11 ++++++++++- 2 files changed, 25 insertions(+), 1 deletion(-) diff --git a/drivers/common/mlx5/mlx5_devx_cmds.c b/drivers/common/mlx5/mlx5_devx_cmds.c index d12ebf8487..8f53303fa7 100644 --- a/drivers/common/mlx5/mlx5_devx_cmds.c +++ b/drivers/common/mlx5/mlx5_devx_cmds.c @@ -1244,6 +1244,21 @@ mlx5_devx_cmd_query_hca_attr(void *ctx, MLX5_GET(qos_cap, hcattr, packet_pacing); attr->qos.wqe_rate_pp = MLX5_GET(qos_cap, hcattr, wqe_rate_pp); + attr->qos.packet_pacing_burst_bound = + MLX5_GET(qos_cap, hcattr, + packet_pacing_burst_bound); + attr->qos.packet_pacing_typical_size = + MLX5_GET(qos_cap, hcattr, + packet_pacing_typical_size); + attr->qos.packet_pacing_max_rate = + MLX5_GET(qos_cap, hcattr, + packet_pacing_max_rate); + attr->qos.packet_pacing_min_rate = + MLX5_GET(qos_cap, hcattr, + packet_pacing_min_rate); + attr->qos.packet_pacing_rate_table_size = + MLX5_GET(qos_cap, hcattr, + packet_pacing_rate_table_size); if (attr->qos.flow_meter_aso_sup) { attr->qos.log_meter_aso_granularity = MLX5_GET(qos_cap, hcattr, diff --git a/drivers/common/mlx5/mlx5_devx_cmds.h b/drivers/common/mlx5/mlx5_devx_cmds.h index da50fc686c..930ae2c072 100644 --- a/drivers/common/mlx5/mlx5_devx_cmds.h +++ b/drivers/common/mlx5/mlx5_devx_cmds.h @@ -67,7 +67,16 @@ struct mlx5_hca_qos_attr { /* Power of the maximum allocation granularity Object. */ uint32_t log_max_num_meter_aso:5; /* Power of the maximum number of supported objects. */ - + uint32_t packet_pacing_burst_bound:1; + /* HW supports burst_upper_bound PP parameter. */ + uint32_t packet_pacing_typical_size:1; + /* HW supports typical_packet_size PP parameter. */ + uint32_t packet_pacing_max_rate; + /* Maximum supported pacing rate in kbps. */ + uint32_t packet_pacing_min_rate; + /* Minimum supported pacing rate in kbps. */ + uint16_t packet_pacing_rate_table_size; + /* Number of entries in the HW rate table. */ }; struct mlx5_hca_vdpa_attr { -- 2.43.0
