[dpdk-dev] [PATCH v2 07/28] net/mlx5: support Tx interface query using new API

[Matan Azrad <matan@mellanox.com>]

From: Dekel Peled <dekelp@mellanox.com>

Implement function mlx5_devx_cmd_qp_tis_td_query(), to query
QP TIS Transport Domain value.

Add related structs in mlx5_prm.h.

Signed-off-by: Dekel Peled <dekelp@mellanox.com>
Acked-by: Matan Azrad <matan@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
---
 drivers/net/mlx5/mlx5.h           |  2 ++
 drivers/net/mlx5/mlx5_devx_cmds.c | 34 ++++++++++++++++++++++++++++++++++
 drivers/net/mlx5/mlx5_prm.h       | 34 ++++++++++++++++++++++++++++++++++
 3 files changed, 70 insertions(+)

diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index 7041bbc..5ae99dc 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -737,4 +737,6 @@ int mlx5_devx_cmd_query_hca_attr(struct ibv_context *ctx,
 struct mlx5_devx_obj *mlx5_devx_cmd_mkey_create(struct ibv_context *ctx,
 					     struct mlx5_devx_mkey_attr *attr);
 int mlx5_devx_get_out_command_status(void *out);
+int mlx5_devx_cmd_qp_query_tis_td(struct ibv_qp *qp, uint32_t tis_num,
+				  uint32_t *tis_td);
 #endif /* RTE_PMD_MLX5_H_ */
diff --git a/drivers/net/mlx5/mlx5_devx_cmds.c b/drivers/net/mlx5/mlx5_devx_cmds.c
index 1cba00f..3d07fcf 100644
--- a/drivers/net/mlx5/mlx5_devx_cmds.c
+++ b/drivers/net/mlx5/mlx5_devx_cmds.c
@@ -390,3 +390,37 @@ struct mlx5_devx_obj *
 	rc = (rc > 0) ? -rc : rc;
 	return rc;
 }
+
+/**
+ * Query TIS transport domain from QP verbs object using DevX API.
+ *
+ * @param[in] qp
+ *   Pointer to verbs QP returned by ibv_create_qp .
+ * @param[in] tis_num
+ *   TIS number of TIS to query.
+ * @param[out] tis_td
+ *   Pointer to TIS transport domain variable, to be set by the routine.
+ *
+ * @return
+ *   0 on success, a negative value otherwise.
+ */
+int
+mlx5_devx_cmd_qp_query_tis_td(struct ibv_qp *qp, uint32_t tis_num,
+			      uint32_t *tis_td)
+{
+	uint32_t in[MLX5_ST_SZ_DW(query_tis_in)] = {0};
+	uint32_t out[MLX5_ST_SZ_DW(query_tis_out)] = {0};
+	int rc;
+	void *tis_ctx;
+
+	MLX5_SET(query_tis_in, in, opcode, MLX5_CMD_OP_QUERY_TIS);
+	MLX5_SET(query_tis_in, in, tisn, tis_num);
+	rc = mlx5_glue->devx_qp_query(qp, in, sizeof(in), out, sizeof(out));
+	if (rc) {
+		DRV_LOG(ERR, "Failed to query QP using DevX");
+		return -rc;
+	};
+	tis_ctx = MLX5_ADDR_OF(query_tis_out, out, tis_context);
+	*tis_td = MLX5_GET(tisc, tis_ctx, transport_domain);
+	return 0;
+}
diff --git a/drivers/net/mlx5/mlx5_prm.h b/drivers/net/mlx5/mlx5_prm.h
index 4f20dea..b5de0c3 100644
--- a/drivers/net/mlx5/mlx5_prm.h
+++ b/drivers/net/mlx5/mlx5_prm.h
@@ -627,6 +627,7 @@ enum {
 	MLX5_CMD_OP_QUERY_HCA_CAP = 0x100,
 	MLX5_CMD_OP_CREATE_MKEY = 0x200,
 	MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT = 0x754,
+	MLX5_CMD_OP_QUERY_TIS = 0x915,
 	MLX5_CMD_OP_ALLOC_FLOW_COUNTER = 0x939,
 	MLX5_CMD_OP_QUERY_FLOW_COUNTER = 0x93b,
 };
@@ -1234,6 +1235,39 @@ struct mlx5_ifc_query_nic_vport_context_in_bits {
 	u8 reserved_at_68[0x18];
 };
 
+struct mlx5_ifc_tisc_bits {
+	u8 strict_lag_tx_port_affinity[0x1];
+	u8 reserved_at_1[0x3];
+	u8 lag_tx_port_affinity[0x04];
+	u8 reserved_at_8[0x4];
+	u8 prio[0x4];
+	u8 reserved_at_10[0x10];
+	u8 reserved_at_20[0x100];
+	u8 reserved_at_120[0x8];
+	u8 transport_domain[0x18];
+	u8 reserved_at_140[0x8];
+	u8 underlay_qpn[0x18];
+	u8 reserved_at_160[0x3a0];
+};
+
+struct mlx5_ifc_query_tis_out_bits {
+	u8 status[0x8];
+	u8 reserved_at_8[0x18];
+	u8 syndrome[0x20];
+	u8 reserved_at_40[0x40];
+	struct mlx5_ifc_tisc_bits tis_context;
+};
+
+struct mlx5_ifc_query_tis_in_bits {
+	u8 opcode[0x10];
+	u8 reserved_at_10[0x10];
+	u8 reserved_at_20[0x10];
+	u8 op_mod[0x10];
+	u8 reserved_at_40[0x8];
+	u8 tisn[0x18];
+	u8 reserved_at_60[0x20];
+};
+
 /* CQE format mask. */
 #define MLX5E_CQE_FORMAT_MASK 0xc
 
-- 
1.8.3.1