Use BlueFlame for RDMA Write [with immediate] without data

Use Blue-Flame for RDMA Write and RDMA Write with immediate without
any data (no s/g).  This improves latency for those messages.

Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il>
Reviewed-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/qp.c b/src/qp.c
index a032517..67da6a4 100644
--- a/src/qp.c
+++ b/src/qp.c
@@ -267,6 +267,8 @@ int mlx4_post_send(struct ibv_qp *ibqp, struct ibv_send_wr *wr,
 				/* fall through */
 			case IBV_WR_RDMA_WRITE:
 			case IBV_WR_RDMA_WRITE_WITH_IMM:
+				if (!wr->num_sge)
+					inl = 1;
 				set_raddr_seg(wqe, wr->wr.rdma.remote_addr,
 					      wr->wr.rdma.rkey);
 				wqe  += sizeof (struct mlx4_wqe_raddr_seg);