Update function mlx5_devx_cmd_query_hca_attr() to add the
reg_c_preserve bit query.
The stored metadata in register C may be lost in NIC Tx and
FDB egress while doing one of the following operations:
- packet encapsulation.
- packet mirroring (multiple processing paths).
- packet sampling (using Flow Sampler).
If the reg_c_preserve bit is set to 1, then the above
limitation is obsolete, the all metadata registers Cx
preserve their values even through the operations mentioned
above.
Signed-off-by: Jiawei Wang <jiaw...@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viachesl...@nvidia.com>
---
drivers/common/mlx5/mlx5_devx_cmds.c | 2 ++
drivers/common/mlx5/mlx5_devx_cmds.h | 1 +
drivers/common/mlx5/mlx5_prm.h | 4 +++-
3 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/common/mlx5/mlx5_devx_cmds.c
b/drivers/common/mlx5/mlx5_devx_cmds.c
index 3bf5279..a1b4910 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.c
+++ b/drivers/common/mlx5/mlx5_devx_cmds.c
@@ -728,6 +728,8 @@ struct mlx5_devx_obj *
attr->log_max_pd = MLX5_GET(cmd_hca_cap, hcattr, log_max_pd);
attr->log_max_srq = MLX5_GET(cmd_hca_cap, hcattr, log_max_srq);
attr->log_max_srq_sz = MLX5_GET(cmd_hca_cap, hcattr, log_max_srq_sz);
+ attr->reg_c_preserve =
+ MLX5_GET(cmd_hca_cap, hcattr, reg_c_preserve);
if (attr->qos.sup) {
MLX5_SET(query_hca_cap_in, in, op_mod,
MLX5_GET_HCA_CAP_OP_MOD_QOS_CAP |
diff --git a/drivers/common/mlx5/mlx5_devx_cmds.h
b/drivers/common/mlx5/mlx5_devx_cmds.h
index 94e9bbb..e0fa595 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.h
+++ b/drivers/common/mlx5/mlx5_devx_cmds.h
@@ -114,6 +114,7 @@ struct mlx5_hca_attr {
uint32_t scatter_fcs_w_decap_disable:1;
uint32_t flow_hit_aso:1; /* General obj type FLOW_HIT_ASO supported. */
uint32_t regex:1;
+ uint32_t reg_c_preserve:1;
uint32_t regexp_num_of_engines;
uint32_t log_max_ft_sampler_num:8;
struct mlx5_hca_qos_attr qos;
diff --git a/drivers/common/mlx5/mlx5_prm.h b/drivers/common/mlx5/mlx5_prm.h
index 7d5cf96..712f698 100644
--- a/drivers/common/mlx5/mlx5_prm.h
+++ b/drivers/common/mlx5/mlx5_prm.h
@@ -1130,7 +1130,9 @@ struct mlx5_ifc_cmd_hca_cap_bits {
u8 regexp[0x1];
u8 reserved_at_a1[0x3];
u8 regexp_num_of_engines[0x4];
- u8 reserved_at_a8[0x3];
+ u8 reserved_at_a8[0x1];
+ u8 reg_c_preserve[0x1];
+ u8 reserved_at_aa[0x1];
u8 log_max_srq[0x5];
u8 reserved_at_b0[0x3];
u8 regexp_log_crspace_size[0x5];
--
1.8.3.1
