[PATCH rdma-next v2 7/9] RDMA/mlx5: Advertise ECE support

[Leon Romanovsky <leon@kernel.org>]

From: Leon Romanovsky <leonro@mellanox.com>

The ECE bits are configured through create_qp and modify_qp commands.
While the create_qp() can be easily extended, it is not an easy task
for the modify_qp().

The new bit in the comp_mask is needed to mark that kernel supports
ECE and can receive data instead of "reserved" field in the
struct mlx5_ib_modify_qp.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/hw/mlx5/main.c | 3 +++
 include/uapi/rdma/mlx5-abi.h      | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 6094ab2f4cd7..570c519ca530 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1971,6 +1971,9 @@ static int mlx5_ib_alloc_ucontext(struct ib_ucontext *uctx,
 		resp.response_length += sizeof(resp.dump_fill_mkey);
 	}

+	if (MLX5_CAP_GEN(dev->mdev, ece_support))
+		resp.comp_mask |= MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_ECE;
+
 	err = ib_copy_to_udata(udata, &resp, resp.response_length);
 	if (err)
 		goto out_mdev;
diff --git a/include/uapi/rdma/mlx5-abi.h b/include/uapi/rdma/mlx5-abi.h
index bc9d9e3cb369..90ea1e5aa291 100644
--- a/include/uapi/rdma/mlx5-abi.h
+++ b/include/uapi/rdma/mlx5-abi.h
@@ -100,6 +100,7 @@ struct mlx5_ib_alloc_ucontext_req_v2 {
 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,
 };

 enum mlx5_user_cmds_supp_uhw {
--
2.26.2