linux-kernel - [PATCH rdma-next 2/2] RDMA/mlx5: Add SQD2RTS bit to the alloc ucontext response

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Date:   Mon, 10 May 2021 13:23:33 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...dia.com>
Cc:     Sergey Gorenko <sergeygo@...dia.com>,
        Evgenii Kochetov <evgeniik@...dia.com>,
        linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org
Subject: [PATCH rdma-next 2/2] RDMA/mlx5: Add SQD2RTS bit to the alloc ucontext response

From: Sergey Gorenko <sergeygo@...dia.com>

The new bit in the comp_mask is needed to mark that kernel supports
SQD2RTS transition for the modify QP command.

Reviewed-by: Evgenii Kochetov <evgeniik@...dia.com>
Signed-off-by: Sergey Gorenko <sergeygo@...dia.com>
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 drivers/infiniband/hw/mlx5/main.c | 4 ++++
 include/uapi/rdma/mlx5-abi.h      | 1 +
 2 files changed, 5 insertions(+)

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 6d1dd09a4388..312aa731860d 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1817,6 +1817,10 @@ static int set_ucontext_resp(struct ib_ucontext *uctx,
 		resp->comp_mask |= MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_ECE;
 
 	resp->num_dyn_bfregs = bfregi->num_dyn_bfregs;
+
+	if (MLX5_CAP_GEN(dev->mdev, drain_sigerr))
+		resp->comp_mask |= MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_SQD2RTS;
+
 	return 0;
 }
 
diff --git a/include/uapi/rdma/mlx5-abi.h b/include/uapi/rdma/mlx5-abi.h
index 27905a0268c9..995faf8f44bd 100644
--- a/include/uapi/rdma/mlx5-abi.h
+++ b/include/uapi/rdma/mlx5-abi.h
@@ -101,6 +101,7 @@ enum mlx5_ib_alloc_ucontext_resp_mask {
 	MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_CORE_CLOCK_OFFSET = 1UL << 0,
 	MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_DUMP_FILL_MKEY    = 1UL << 1,
 	MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_ECE               = 1UL << 2,
+	MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_SQD2RTS           = 1UL << 3,
 };
 
 enum mlx5_user_cmds_supp_uhw {
-- 
2.31.1