From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6DF2AC43603 for ; Tue, 17 Dec 2019 20:12:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3DC00206D7 for ; Tue, 17 Dec 2019 20:12:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576613525; bh=OiFhIcifzz8a9/5L/DqokOrcqWj3Md1Md86yV0+RNkg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Y1RMyDU5yx+vqUaEDmEz25Nj3/h6zLAJlPBm2UJnSGF6sldx6n0A6R5nRD5K2c56R JCzlKqebmF2V5m1AxpUj4c66dERTVIrd0WkOp6McseRgQgUC+uxbZ88FGGI+W/wEDs lDUMp6m13Ky6ICEkPZDmol6/jOAIlD1spzRp0lPE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727773AbfLQUK4 (ORCPT ); Tue, 17 Dec 2019 15:10:56 -0500 Received: from mail.kernel.org ([198.145.29.99]:37260 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728506AbfLQUKz (ORCPT ); Tue, 17 Dec 2019 15:10:55 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 025D12146E; Tue, 17 Dec 2019 20:10:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576613454; bh=OiFhIcifzz8a9/5L/DqokOrcqWj3Md1Md86yV0+RNkg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NC41xaww1ctmU2MPm1zlQEHL26Nk3MeS1NDU86P5+mLtaYZHJYIMqxhDiH7o1bwhx V1Oz/sFvPyVUJQ0TD2xYsHEtEIZ8LNVpjY8SGABKz267zcEmbSQUcMRi3o7D6Tovb2 uyB/EzRfopCNOIr/QnE6kJxTAu2waxeHJ3NqfXAo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Eran Ben Elisha , Saeed Mahameed Subject: [PATCH 5.4 27/37] net/mlx5e: Fix TXQ indices to be sequential Date: Tue, 17 Dec 2019 21:09:48 +0100 Message-Id: <20191217200732.249770987@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191217200721.741054904@linuxfoundation.org> References: <20191217200721.741054904@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Eran Ben Elisha [ Upstream commit c55d8b108caa2ec1ae8dddd02cb9d3a740f7c838 ] Cited patch changed (channel index, tc) => (TXQ index) mapping to be a static one, in order to keep indices consistent when changing number of channels or TCs. For 32 channels (OOB) and 8 TCs, real num of TXQs is 256. When reducing the amount of channels to 8, the real num of TXQs will be changed to 64. This indices method is buggy: - Channel #0, TC 3, the TXQ index is 96. - Index 8 is not valid, as there is no such TXQ from driver perspective (As it represents channel #8, TC 0, which is not valid with the above configuration). As part of driver's select queue, it calls netdev_pick_tx which returns an index in the range of real number of TXQs. Depends on the return value, with the examples above, driver could have returned index larger than the real number of tx queues, or crash the kernel as it tries to read invalid address of SQ which was not allocated. Fix that by allocating sequential TXQ indices, and hold a new mapping between (channel index, tc) => (real TXQ index). This mapping will be updated as part of priv channels activation, and is used in mlx5e_select_queue to find the selected queue index. The existing indices mapping (channel_tc2txq) is no longer needed, as it is used only for statistics structures and can be calculated on run time. Delete its definintion and updates. Fixes: 8bfaf07f7806 ("net/mlx5e: Present SW stats when state is not opened") Signed-off-by: Eran Ben Elisha Signed-off-by: Saeed Mahameed Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/mellanox/mlx5/core/en.h | 2 - drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 31 ++++++++------------- drivers/net/ethernet/mellanox/mlx5/core/en_stats.c | 2 - drivers/net/ethernet/mellanox/mlx5/core/en_tx.c | 2 - 4 files changed, 15 insertions(+), 22 deletions(-) --- a/drivers/net/ethernet/mellanox/mlx5/core/en.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h @@ -816,7 +816,7 @@ struct mlx5e_xsk { struct mlx5e_priv { /* priv data path fields - start */ struct mlx5e_txqsq *txq2sq[MLX5E_MAX_NUM_CHANNELS * MLX5E_MAX_NUM_TC]; - int channel_tc2txq[MLX5E_MAX_NUM_CHANNELS][MLX5E_MAX_NUM_TC]; + int channel_tc2realtxq[MLX5E_MAX_NUM_CHANNELS][MLX5E_MAX_NUM_TC]; #ifdef CONFIG_MLX5_CORE_EN_DCB struct mlx5e_dcbx_dp dcbx_dp; #endif --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -1693,11 +1693,10 @@ static int mlx5e_open_sqs(struct mlx5e_c struct mlx5e_params *params, struct mlx5e_channel_param *cparam) { - struct mlx5e_priv *priv = c->priv; int err, tc; for (tc = 0; tc < params->num_tc; tc++) { - int txq_ix = c->ix + tc * priv->max_nch; + int txq_ix = c->ix + tc * params->num_channels; err = mlx5e_open_txqsq(c, c->priv->tisn[c->lag_port][tc], txq_ix, params, &cparam->sq, &c->sq[tc], tc); @@ -2878,26 +2877,21 @@ static void mlx5e_netdev_set_tcs(struct netdev_set_tc_queue(netdev, tc, nch, 0); } -static void mlx5e_build_tc2txq_maps(struct mlx5e_priv *priv) +static void mlx5e_build_txq_maps(struct mlx5e_priv *priv) { - int i, tc; + int i, ch; - for (i = 0; i < priv->max_nch; i++) - for (tc = 0; tc < priv->profile->max_tc; tc++) - priv->channel_tc2txq[i][tc] = i + tc * priv->max_nch; -} + ch = priv->channels.num; -static void mlx5e_build_tx2sq_maps(struct mlx5e_priv *priv) -{ - struct mlx5e_channel *c; - struct mlx5e_txqsq *sq; - int i, tc; + for (i = 0; i < ch; i++) { + int tc; + + for (tc = 0; tc < priv->channels.params.num_tc; tc++) { + struct mlx5e_channel *c = priv->channels.c[i]; + struct mlx5e_txqsq *sq = &c->sq[tc]; - for (i = 0; i < priv->channels.num; i++) { - c = priv->channels.c[i]; - for (tc = 0; tc < c->num_tc; tc++) { - sq = &c->sq[tc]; priv->txq2sq[sq->txq_ix] = sq; + priv->channel_tc2realtxq[i][tc] = i + tc * ch; } } } @@ -2912,7 +2906,7 @@ void mlx5e_activate_priv_channels(struct netif_set_real_num_tx_queues(netdev, num_txqs); netif_set_real_num_rx_queues(netdev, num_rxqs); - mlx5e_build_tx2sq_maps(priv); + mlx5e_build_txq_maps(priv); mlx5e_activate_channels(&priv->channels); mlx5e_xdp_tx_enable(priv); netif_tx_start_all_queues(priv->netdev); @@ -5028,7 +5022,6 @@ static int mlx5e_nic_init(struct mlx5_co if (err) mlx5_core_err(mdev, "TLS initialization failed, %d\n", err); mlx5e_build_nic_netdev(netdev); - mlx5e_build_tc2txq_maps(priv); mlx5e_health_create_reporters(priv); return 0; --- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c @@ -1601,7 +1601,7 @@ static int mlx5e_grp_channels_fill_strin for (j = 0; j < NUM_SQ_STATS; j++) sprintf(data + (idx++) * ETH_GSTRING_LEN, sq_stats_desc[j].format, - priv->channel_tc2txq[i][tc]); + i + tc * max_nch); for (i = 0; i < max_nch; i++) { for (j = 0; j < NUM_XSKSQ_STATS * is_xsk; j++) --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c @@ -93,7 +93,7 @@ u16 mlx5e_select_queue(struct net_device if (txq_ix >= num_channels) txq_ix = priv->txq2sq[txq_ix]->ch_ix; - return priv->channel_tc2txq[txq_ix][up]; + return priv->channel_tc2realtxq[txq_ix][up]; } static inline int mlx5e_skb_l2_header_offset(struct sk_buff *skb)