[PATCH v1 1/2] common/mlx5: query E-Switch manager vport ID

[Shun Hao]

One of the E-Switch vports plays the special role - it is assigned as
"E-Switch manager" and has some special exclusive rights and duties - it
maintains all the representors, manages FDB domain flows, etc. By
default, the E-Switch vport index was supposed to be zero on standalone
NICs (regular ConnectX) and 0xFFFE SmartNIC (BlueField), but that was
not always correct - this index can be assigned with any value by
kernel/hypervisor.

To handle this, this uses the DevX API to query E-Switch manager vport
ID directly from firmware during initialization.

Fixes: a564038699f9 ("net/mlx5: support E-Switch manager egress traffic match")
Cc: stable at dpdk.org

Signed-off-by: Shun Hao <shunh at nvidia.com>
---
 drivers/common/mlx5/mlx5_devx_cmds.c | 12 ++++++++++++
 drivers/common/mlx5/mlx5_devx_cmds.h |  2 ++
 drivers/common/mlx5/mlx5_prm.h       | 12 ++++++++++++
 3 files changed, 26 insertions(+)

diff --git a/drivers/common/mlx5/mlx5_devx_cmds.c b/drivers/common/mlx5/mlx5_devx_cmds.c
index 2e807a0829..6d632b97ed 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.c
+++ b/drivers/common/mlx5/mlx5_devx_cmds.c
@@ -1130,6 +1130,18 @@ mlx5_devx_cmd_query_hca_attr(void *ctx,
 			goto error;
 		}
 	}
+	if (attr->eswitch_manager) {
+		hcattr = mlx5_devx_get_hca_cap(ctx, in, out, &rc,
+				MLX5_SET_HCA_CAP_OP_MOD_ESW |
+				MLX5_HCA_CAP_OPMOD_GET_CUR);
+		if (!hcattr)
+			return rc;
+		attr->esw_mgr_vport_id_valid =
+			MLX5_GET(esw_cap, hcattr,
+				 esw_manager_vport_number_valid);
+		attr->esw_mgr_vport_id =
+			MLX5_GET(esw_cap, hcattr, esw_manager_vport_number);
+	}
 	return 0;
 error:
 	rc = (rc > 0) ? -rc : rc;
diff --git a/drivers/common/mlx5/mlx5_devx_cmds.h b/drivers/common/mlx5/mlx5_devx_cmds.h
index 37821b493e..4373761c29 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.h
+++ b/drivers/common/mlx5/mlx5_devx_cmds.h
@@ -252,6 +252,8 @@ struct mlx5_hca_attr {
 	uint32_t umr_modify_entity_size_disabled:1;
 	uint32_t umr_indirect_mkey_disabled:1;
 	uint32_t log_min_stride_wqe_sz:5;
+	uint32_t esw_mgr_vport_id_valid:1; /* E-Switch Mgr vport ID is valid. */
+	uint16_t esw_mgr_vport_id; /* E-Switch Mgr vport ID . */
 	uint16_t max_wqe_sz_sq;
 };
 
diff --git a/drivers/common/mlx5/mlx5_prm.h b/drivers/common/mlx5/mlx5_prm.h
index 495b63191a..b9e39aa717 100644
--- a/drivers/common/mlx5/mlx5_prm.h
+++ b/drivers/common/mlx5/mlx5_prm.h
@@ -1264,6 +1264,7 @@ enum {
 	MLX5_GET_HCA_CAP_OP_MOD_QOS_CAP = 0xc << 1,
 	MLX5_GET_HCA_CAP_OP_MOD_ROCE = 0x4 << 1,
 	MLX5_GET_HCA_CAP_OP_MOD_NIC_FLOW_TABLE = 0x7 << 1,
+	MLX5_SET_HCA_CAP_OP_MOD_ESW = 0x9 << 1,
 	MLX5_GET_HCA_CAP_OP_MOD_VDPA_EMULATION = 0x13 << 1,
 	MLX5_GET_HCA_CAP_OP_MOD_PARSE_GRAPH_NODE_CAP = 0x1C << 1,
 	MLX5_GET_HCA_CAP_OP_MOD_GENERAL_DEVICE_2 = 0x20 << 1,
@@ -1926,6 +1927,16 @@ struct mlx5_ifc_cmd_hca_cap_2_bits {
 	u8 reserved_at_100[0x700];
 };
 
+struct mlx5_ifc_esw_cap_bits {
+	u8 reserved_at_0[0x60];
+
+	u8 esw_manager_vport_number_valid[0x1];
+	u8 reserved_at_61[0xf];
+	u8 esw_manager_vport_number[0x10];
+
+	u8 reserved_at_80[0x780];
+};
+
 union mlx5_ifc_hca_cap_union_bits {
 	struct mlx5_ifc_cmd_hca_cap_bits cmd_hca_cap;
 	struct mlx5_ifc_cmd_hca_cap_2_bits cmd_hca_cap_2;
@@ -1934,6 +1945,7 @@ union mlx5_ifc_hca_cap_union_bits {
 	struct mlx5_ifc_qos_cap_bits qos_cap;
 	struct mlx5_ifc_virtio_emulation_cap_bits vdpa_caps;
 	struct mlx5_ifc_flow_table_nic_cap_bits flow_table_nic_cap;
+	struct mlx5_ifc_esw_cap_bits esw_cap;
 	struct mlx5_ifc_roce_caps_bits roce_caps;
 	u8 reserved_at_0[0x8000];
 };
-- 
2.20.0