[PATCH v4 6/9] common/mlx5: add WQE-based QP synchronous basics

[Suanming Mou]

Nvidia HW provides a synchronous mechanism between QPs. When
creating the QPs, user can set one as primary and another as
follower. The follower QP's WQE execution can be controlled
by primary QP via SEND_EN WQE.

This commit introduces the SEND_EN WQE to improve the WQE
execution sync-up between primary and follower QPs.

Signed-off-by: Suanming Mou <suanmingm at nvidia.com>
Acked-by: Matan Azrad <matan at nvidia.com>
---
 drivers/common/mlx5/mlx5_devx_cmds.c |  6 ++++++
 drivers/common/mlx5/mlx5_devx_cmds.h |  3 +++
 drivers/common/mlx5/mlx5_prm.h       | 11 +++++++++++
 3 files changed, 20 insertions(+)

diff --git a/drivers/common/mlx5/mlx5_devx_cmds.c b/drivers/common/mlx5/mlx5_devx_cmds.c
index 4332081165..ef87862a6d 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.c
+++ b/drivers/common/mlx5/mlx5_devx_cmds.c
@@ -2475,6 +2475,12 @@ mlx5_devx_cmd_create_qp(void *ctx,
 				 attr->dbr_umem_valid);
 			MLX5_SET(qpc, qpc, dbr_umem_id, attr->dbr_umem_id);
 		}
+		if (attr->cd_master)
+			MLX5_SET(qpc, qpc, cd_master, attr->cd_master);
+		if (attr->cd_slave_send)
+			MLX5_SET(qpc, qpc, cd_slave_send, attr->cd_slave_send);
+		if (attr->cd_slave_recv)
+			MLX5_SET(qpc, qpc, cd_slave_receive, attr->cd_slave_recv);
 		MLX5_SET64(qpc, qpc, dbr_addr, attr->dbr_address);
 		MLX5_SET64(create_qp_in, in, wq_umem_offset,
 			   attr->wq_umem_offset);
diff --git a/drivers/common/mlx5/mlx5_devx_cmds.h b/drivers/common/mlx5/mlx5_devx_cmds.h
index cb3f3a211b..e071cd841f 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.h
+++ b/drivers/common/mlx5/mlx5_devx_cmds.h
@@ -559,6 +559,9 @@ struct mlx5_devx_qp_attr {
 	uint64_t wq_umem_offset;
 	uint32_t user_index:24;
 	uint32_t mmo:1;
+	uint32_t cd_master:1;
+	uint32_t cd_slave_send:1;
+	uint32_t cd_slave_recv:1;
 };
 
 struct mlx5_devx_virtio_q_couners_attr {
diff --git a/drivers/common/mlx5/mlx5_prm.h b/drivers/common/mlx5/mlx5_prm.h
index 96ce342d29..4990bcaacd 100644
--- a/drivers/common/mlx5/mlx5_prm.h
+++ b/drivers/common/mlx5/mlx5_prm.h
@@ -589,6 +589,17 @@ struct mlx5_rdma_write_wqe {
 	struct mlx5_wqe_dseg dseg[];
 } __rte_packed;
 
+struct mlx5_wqe_send_en_seg {
+	uint32_t reserve[2];
+	uint32_t sqnpc;
+	uint32_t qpn;
+} __rte_packed;
+
+struct mlx5_wqe_send_en_wqe {
+	struct mlx5_wqe_cseg ctr;
+	struct mlx5_wqe_send_en_seg sseg;
+} __rte_packed;
+
 #ifdef PEDANTIC
 #pragma GCC diagnostic error "-Wpedantic"
 #endif
-- 
2.25.1