net/mlx5: Add IFC bits for shared headroom pool PBMC support

Add hardware interface definitions for shared headroom pool (SHP) in
port buffer management:

- shp_pbmc_pbsr_support: capability bit in PCAM enhanced features
  indicating device support for shared headroom pool in PBMC/PBSR.
- shared_headroom_pool: buffer entry in PBMC register (pbmc_reg_bits)
  for the shared headroom pool configuration, reusing the bufferx
  layout; reduce trailing reserved region accordingly.

Signed-off-by: Alexei Lazar <alazar@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260309093435.1850724-2-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 a3948b36820d3925f18e8aba534ef6dbb4bff75d..a76c54bf19271f82f819e70fe21b16e3a5015662 100644 (file)
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -10845,7 +10845,9 @@ struct mlx5_ifc_pcam_enhanced_features_bits {
        u8         fec_200G_per_lane_in_pplm[0x1];
        u8         reserved_at_1e[0x2a];
        u8         fec_100G_per_lane_in_pplm[0x1];
-       u8         reserved_at_49[0xa];
+       u8         reserved_at_49[0x2];
+       u8         shp_pbmc_pbsr_support[0x1];
+       u8         reserved_at_4c[0x7];
        u8         buffer_ownership[0x1];
        u8         resereved_at_54[0x14];
        u8         fec_50G_per_lane_in_pplm[0x1];
@@ -12090,8 +12092,9 @@ struct mlx5_ifc_pbmc_reg_bits {
        u8         port_buffer_size[0x10];
 
        struct mlx5_ifc_bufferx_reg_bits buffer[10];
+       struct mlx5_ifc_bufferx_reg_bits shared_headroom_pool;
 
-       u8         reserved_at_2e0[0x80];
+       u8         reserved_at_320[0x40];
 };
 
 struct mlx5_ifc_sbpr_reg_bits {