diff mbox series

[v2,1/5] common/mlx5: query register c preserve capability via DevX

Message ID 1610447359-411658-2-git-send-email-jiaweiw@nvidia.com (mailing list archive)
State Accepted, archived
Delegated to: Raslan Darawsheh
Headers
Series Add the E-Switch mirroring and jump supports |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Jiawei Wang Jan. 12, 2021, 10:29 a.m. UTC 
  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limitation is obsolete, the all metadata registers Cx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 <jiaweiw@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@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 mbox series

Patch

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];