MFC r330659:

Avoid more LFENCE/SFENCe on x86 in mlx5en(4),
by using the FreeBSD native fences.

Submitted by:	kib@
Sponsored by:	Mellanox Technologies

3 files changed, 3 insertions, 3 deletions

diff --git a/sys/dev/mlx5/mlx5_en/mlx5_en_main.c b/sys/dev/mlx5/mlx5_en/mlx5_en_main.c
index c70cf247..33e62b4 100644
--- a/sys/dev/mlx5/mlx5_en/mlx5_en_main.c
+++ b/sys/dev/mlx5/mlx5_en/mlx5_en_main.c
@@ -1256,7 +1256,7 @@ mlx5e_sq_send_nops_locked(struct mlx5e_sq *sq, int can_sleep)
 		}
 		/* send a single NOP */
 		mlx5e_send_nop(sq, 1);
-		wmb();
+		atomic_thread_fence_rel();
 	}
 done:
 	/* Check if we need to write the doorbell */
diff --git a/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c b/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c
index 69b0a01..b15d2c2 100644
--- a/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c
+++ b/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c
@@ -429,7 +429,7 @@ mlx5e_poll_tx_cq(struct mlx5e_sq *sq, int budget)
 	mlx5_cqwq_update_db_record(&sq->cq.wq);
 
 	/* Ensure cq space is freed before enabling more cqes */
-	wmb();
+	atomic_thread_fence_rel();
 
 	sq->cc = sqcc;
 
diff --git a/sys/dev/mlx5/mlx5_en/mlx5_en_txrx.c b/sys/dev/mlx5/mlx5_en/mlx5_en_txrx.c
index 43bc059..771b4c6 100644
--- a/sys/dev/mlx5/mlx5_en/mlx5_en_txrx.c
+++ b/sys/dev/mlx5/mlx5_en/mlx5_en_txrx.c
@@ -38,7 +38,7 @@ mlx5e_get_cqe(struct mlx5e_cq *cq)
 		return (NULL);
 
 	/* ensure cqe content is read after cqe ownership bit */
-	rmb();
+	atomic_thread_fence_acq();
 
 	return (cqe);
 }