From patchwork Sun Aug 16 16:05:30 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eran Ben Elisha X-Patchwork-Id: 7022541 Return-Path: X-Original-To: patchwork-linux-rdma@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 202BBC05AC for ; Sun, 16 Aug 2015 16:06:23 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 225CC20515 for ; Sun, 16 Aug 2015 16:06:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 204592077E for ; Sun, 16 Aug 2015 16:06:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752543AbbHPQGU (ORCPT ); Sun, 16 Aug 2015 12:06:20 -0400 Received: from [193.47.165.129] ([193.47.165.129]:56284 "EHLO mellanox.co.il" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751824AbbHPQGT (ORCPT ); Sun, 16 Aug 2015 12:06:19 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from eranbe@mellanox.com) with ESMTPS (AES256-SHA encrypted); 16 Aug 2015 19:05:39 +0300 Received: from dev-l-vrt-198-005.mtl.labs.mlnx (dev-l-vrt-198-005.mtl.labs.mlnx [10.134.198.5]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id t7GG5b4K027796; Sun, 16 Aug 2015 19:05:38 +0300 From: Eran Ben Elisha To: Doug Ledford Cc: linux-rdma@vger.kernel.org, Or Gerlitz , Eran Ben Elisha , Christoph Lameter , Maor Gottlieb Subject: [PATCH for-next 4/7] net/mlx4_en: Implement mcast loopback prevention for ETH qps Date: Sun, 16 Aug 2015 19:05:30 +0300 Message-Id: <1439741133-30145-5-git-send-email-eranbe@mellanox.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1439741133-30145-1-git-send-email-eranbe@mellanox.com> References: <1439741133-30145-1-git-send-email-eranbe@mellanox.com> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Spam-Status: No, score=-7.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Maor Gottlieb Set the mcast loopback prevention bit in the QPC for ETH MLX QPs (not RSS QPs), when the firmware supports this feature. In addition, all rx ring QPs need to be updated in order not to enforce loopback checks. This prevents getting packets we sent both from the network stack and the HCA. Loopback prevention is done by comparing the counter indices of the sent and receiving QPs. If they're equal, packets aren't loopback-ed. Signed-off-by: Maor Gottlieb Signed-off-by: Eran Ben Elisha --- drivers/net/ethernet/mellanox/mlx4/en_main.c | 22 ++++++++++++++++++++ drivers/net/ethernet/mellanox/mlx4/en_resources.c | 25 +++++++++++++++++++++++ drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 3 ++- 3 files changed, 49 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_main.c b/drivers/net/ethernet/mellanox/mlx4/en_main.c index a946e4b..70e381a 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_main.c @@ -123,6 +123,28 @@ void mlx4_en_update_loopback_state(struct net_device *dev, */ if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback) priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK; + + mutex_lock(&priv->mdev->state_lock); + if (priv->mdev->dev->caps.flags2 & + MLX4_DEV_CAP_FLAG2_UPDATE_QP_SRC_CHECK_LB && + priv->rss_map.indir_qp.qpn) { + int i; + int err = 0; + + for (i = 0; i < priv->rx_ring_num; i++) { + int ret; + + ret = mlx4_en_change_mcast_lb(priv, + &priv->rss_map.qps[i], + !!(features & + NETIF_F_LOOPBACK)); + if (!err) + err = ret; + } + if (err) + mlx4_warn(priv->mdev, "failed to change mcast loopback\n"); + } + mutex_unlock(&priv->mdev->state_lock); } static int mlx4_en_get_profile(struct mlx4_en_dev *mdev) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_resources.c b/drivers/net/ethernet/mellanox/mlx4/en_resources.c index e482fa1b..12aab5a 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_resources.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_resources.c @@ -69,6 +69,15 @@ void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride, context->pri_path.counter_index = priv->counter_index; context->cqn_send = cpu_to_be32(cqn); context->cqn_recv = cpu_to_be32(cqn); + if (!rss && + (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_LB_SRC_CHK) && + context->pri_path.counter_index != + MLX4_SINK_COUNTER_INDEX(mdev->dev)) { + /* disable multicast loopback to qp with same counter */ + if (!(dev->features & NETIF_F_LOOPBACK)) + context->pri_path.fl |= MLX4_FL_ETH_SRC_CHECK_MC_LB; + context->pri_path.control |= MLX4_CTRL_ETH_SRC_CHECK_IF_COUNTER; + } context->db_rec_addr = cpu_to_be64(priv->res.db.dma << 2); if (!(dev->features & NETIF_F_HW_VLAN_CTAG_RX)) context->param3 |= cpu_to_be32(1 << 30); @@ -80,6 +89,22 @@ void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride, } } +int mlx4_en_change_mcast_lb(struct mlx4_en_priv *priv, struct mlx4_qp *qp, + int loopback) +{ + int ret; + struct mlx4_update_qp_params qp_params; + + memset(&qp_params, 0, sizeof(qp_params)); + if (!loopback) + qp_params.flags = MLX4_UPDATE_QP_PARAMS_FLAGS_ETH_CHECK_MC_LB; + + ret = mlx4_update_qp(priv->mdev->dev, qp->qpn, + MLX4_UPDATE_QP_ETH_SRC_CHECK_MC_LB, + &qp_params); + + return ret; +} int mlx4_en_map_buffer(struct mlx4_buf *buf) { diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h index 666d166..7db86d4 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h @@ -797,7 +797,8 @@ void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride, void mlx4_en_sqp_event(struct mlx4_qp *qp, enum mlx4_event event); int mlx4_en_map_buffer(struct mlx4_buf *buf); void mlx4_en_unmap_buffer(struct mlx4_buf *buf); - +int mlx4_en_change_mcast_lb(struct mlx4_en_priv *priv, struct mlx4_qp *qp, + int loopback); void mlx4_en_calc_rx_buf(struct net_device *dev); int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv); void mlx4_en_release_rss_steer(struct mlx4_en_priv *priv);