Date: Mon, 10 Jul 2017 19:26:50 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r320876 - head/sys/dev/mlx4/mlx4_en Message-ID: <201707101926.v6AJQoEW050827@repo.freebsd.org>
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Author: hselasky Date: Mon Jul 10 19:26:50 2017 New Revision: 320876 URL: https://svnweb.freebsd.org/changeset/base/320876 Log: 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 Modified: head/sys/dev/mlx4/mlx4_en/mlx4_en_rx.c Modified: head/sys/dev/mlx4/mlx4_en/mlx4_en_rx.c ============================================================================== --- head/sys/dev/mlx4/mlx4_en/mlx4_en_rx.c Mon Jul 10 17:53:12 2017 (r320875) +++ head/sys/dev/mlx4/mlx4_en/mlx4_en_rx.c Mon Jul 10 19:26:50 2017 (r320876) @@ -394,8 +394,14 @@ int mlx4_en_activate_rx_rings(struct mlx4_en_priv *pri 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;
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