net/mlx5: Add IFC bits for extended ETS rate limit bandwidth value

Add hardware interface definitions to support extended bandwidth rate
limiting in the QoS Enhanced Transmission Selection (ETS) configuration.

The new fields include:
- max_bw_value: extended from 8-bit to 16-bit in ets_tcn_config_reg,
  simplifying the implementation by using a single field instead of
  separate MSB/LSB fields.
- qetcr_qshr_max_bw_val_msb: capability bit in qcam_qos_feature_cap_mask
  indicating device support for the extended 16-bit max_bw_value field.

These interface additions are prerequisites for increasing the per-TC
rate limit beyond 255 Gbps to support higher-bandwidth NICs.

Signed-off-by: Alexei Lazar <alazar@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/1768200608-1543180-1-git-send-email-tariqt@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index e844cfa4fe0a55667c875f4d71542e3ed478ba6d..775cb0c56865feaf0c545ad8f304153f51f6dc37 100644 (file)
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -11009,7 +11009,9 @@ struct mlx5_ifc_qcam_access_reg_cap_mask {
 };
 
 struct mlx5_ifc_qcam_qos_feature_cap_mask {
-       u8         qcam_qos_feature_cap_mask_127_to_1[0x7F];
+       u8         qcam_qos_feature_cap_mask_127_to_5[0x7B];
+       u8         qetcr_qshr_max_bw_val_msb[0x1];
+       u8         qcam_qos_feature_cap_mask_3_to_1[0x3];
        u8         qpts_trust_both[0x1];
 };
 
@@ -11965,8 +11967,7 @@ struct mlx5_ifc_ets_tcn_config_reg_bits {
 
        u8         reserved_at_20[0xc];
        u8         max_bw_units[0x4];
-       u8         reserved_at_30[0x8];
-       u8         max_bw_value[0x8];
+       u8         max_bw_value[0x10];
 };
 
 struct mlx5_ifc_ets_global_config_reg_bits {