From 7bb7b27fb1a130ea6a42d9f03ad70372a49e56f9 Mon Sep 17 00:00:00 2001 From: Hans Petter Selasky Date: Mon, 10 Jul 2017 19:26:50 +0000 Subject: [PATCH] Make sure the mlx4en RX DMA ring gets stamped with software ownership in order to prevent the flow of QP to error in the firmware once UPDATE_QP is called. MFC after: 3 days Sponsored by: Mellanox Technologies --- sys/dev/mlx4/mlx4_en/mlx4_en_rx.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/sys/dev/mlx4/mlx4_en/mlx4_en_rx.c b/sys/dev/mlx4/mlx4_en/mlx4_en_rx.c index 38c0320db41..05bf7b41467 100644 --- a/sys/dev/mlx4/mlx4_en/mlx4_en_rx.c +++ b/sys/dev/mlx4/mlx4_en/mlx4_en_rx.c @@ -394,8 +394,14 @@ int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv) ring->rx_mb_size = priv->rx_mb_size; ring->stride = stride; - if (ring->stride <= TXBB_SIZE) + if (ring->stride <= TXBB_SIZE) { + /* Stamp first unused send wqe */ + __be32 *ptr = (__be32 *)ring->buf; + __be32 stamp = cpu_to_be32(1 << STAMP_SHIFT); + *ptr = stamp; + /* Move pointer to start of rx section */ ring->buf += TXBB_SIZE; + } ring->log_stride = ffs(ring->stride) - 1; ring->buf_size = ring->size * ring->stride;