From patchwork Wed Jan 22 09:29:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 233565 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=ham 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 3026EC33CB8 for ; Wed, 22 Jan 2020 09:43:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0272024686 for ; Wed, 22 Jan 2020 09:43:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579686188; bh=8u5bBSZvcbj5TDvKR7jmKt4eiSeLil8Ogw8aRHcZKuk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=x7PPFBvXFEtGiWMqvgLFzBp6cY7WwCFzdnksFZeBZ47qCxOqZF9SwD+stKQ3WBsFs JnQxo3MfLdcF4jX8JWTkumyyHHse2BQLXb5V1N5JdKF+fzEPvEvzbwndF7lmBlsYN1 FoHwi7cZJmTFa5Xf/aBpro880sN9j/Ao/UwRUQ7E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387830AbgAVJnG (ORCPT ); Wed, 22 Jan 2020 04:43:06 -0500 Received: from mail.kernel.org ([198.145.29.99]:35314 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387825AbgAVJnG (ORCPT ); Wed, 22 Jan 2020 04:43:06 -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 99AA32467B; Wed, 22 Jan 2020 09:43:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579686185; bh=8u5bBSZvcbj5TDvKR7jmKt4eiSeLil8Ogw8aRHcZKuk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=t0dYCflvnv4wheV0zwV5xlJtiQTIH0RoSoEQRlsIs+6dMN0GW2jFgcFPyYpVG+LKd jJQbpAqjFKbriFzyD47PeQsy5haBWwRf6Gie2nNAAQ4KrTk4ec30uEPda7QnwbCAh5 8rLRt8Nd2NoyyhQjRpMIxLGxI7VnSm04zwrybbDY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Petr Machata , Jiri Pirko , Ido Schimmel , "David S. Miller" Subject: [PATCH 4.19 078/103] mlxsw: spectrum_qdisc: Include MC TCs in Qdisc counters Date: Wed, 22 Jan 2020 10:29:34 +0100 Message-Id: <20200122092814.651229415@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200122092803.587683021@linuxfoundation.org> References: <20200122092803.587683021@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Petr Machata commit 85005b82e59fa7bb7388b12594ab2067bf73d66c upstream. mlxsw configures Spectrum in such a way that BUM traffic is passed not through its nominal traffic class TC, but through its MC counterpart TC+8. However, when collecting statistics, Qdiscs only look at the nominal TC and ignore the MC TC. Add two helpers to compute the value for logical TC from the constituents, one for backlog, the other for tail drops. Use them throughout instead of going through the xstats pointer directly. Counters for TX bytes and packets are deduced from packet priority counters, and therefore already include BUM traffic. wred_drop counter is irrelevant on MC TCs, because RED is not enabled on them. Fixes: 7b8195306694 ("mlxsw: spectrum: Configure MC-aware mode on mlxsw ports") Signed-off-by: Petr Machata Acked-by: Jiri Pirko Signed-off-by: Ido Schimmel Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c | 30 ++++++++++++++----- 1 file changed, 23 insertions(+), 7 deletions(-) --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c @@ -195,6 +195,20 @@ mlxsw_sp_qdisc_get_xstats(struct mlxsw_s return -EOPNOTSUPP; } +static u64 +mlxsw_sp_xstats_backlog(struct mlxsw_sp_port_xstats *xstats, int tclass_num) +{ + return xstats->backlog[tclass_num] + + xstats->backlog[tclass_num + 8]; +} + +static u64 +mlxsw_sp_xstats_tail_drop(struct mlxsw_sp_port_xstats *xstats, int tclass_num) +{ + return xstats->tail_drop[tclass_num] + + xstats->tail_drop[tclass_num + 8]; +} + static void mlxsw_sp_qdisc_bstats_per_priority_get(struct mlxsw_sp_port_xstats *xstats, u8 prio_bitmap, u64 *tx_packets, @@ -269,7 +283,7 @@ mlxsw_sp_setup_tc_qdisc_red_clean_stats( &stats_base->tx_bytes); red_base->prob_mark = xstats->ecn; red_base->prob_drop = xstats->wred_drop[tclass_num]; - red_base->pdrop = xstats->tail_drop[tclass_num]; + red_base->pdrop = mlxsw_sp_xstats_tail_drop(xstats, tclass_num); stats_base->overlimits = red_base->prob_drop + red_base->prob_mark; stats_base->drops = red_base->prob_drop + red_base->pdrop; @@ -369,7 +383,8 @@ mlxsw_sp_qdisc_get_red_xstats(struct mlx early_drops = xstats->wred_drop[tclass_num] - xstats_base->prob_drop; marks = xstats->ecn - xstats_base->prob_mark; - pdrops = xstats->tail_drop[tclass_num] - xstats_base->pdrop; + pdrops = mlxsw_sp_xstats_tail_drop(xstats, tclass_num) - + xstats_base->pdrop; res->pdrop += pdrops; res->prob_drop += early_drops; @@ -402,9 +417,10 @@ mlxsw_sp_qdisc_get_red_stats(struct mlxs overlimits = xstats->wred_drop[tclass_num] + xstats->ecn - stats_base->overlimits; - drops = xstats->wred_drop[tclass_num] + xstats->tail_drop[tclass_num] - + drops = xstats->wred_drop[tclass_num] + + mlxsw_sp_xstats_tail_drop(xstats, tclass_num) - stats_base->drops; - backlog = xstats->backlog[tclass_num]; + backlog = mlxsw_sp_xstats_backlog(xstats, tclass_num); _bstats_update(stats_ptr->bstats, tx_bytes, tx_packets); stats_ptr->qstats->overlimits += overlimits; @@ -575,9 +591,9 @@ mlxsw_sp_qdisc_get_prio_stats(struct mlx tx_packets = stats->tx_packets - stats_base->tx_packets; for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) { - drops += xstats->tail_drop[i]; + drops += mlxsw_sp_xstats_tail_drop(xstats, i); drops += xstats->wred_drop[i]; - backlog += xstats->backlog[i]; + backlog += mlxsw_sp_xstats_backlog(xstats, i); } drops = drops - stats_base->drops; @@ -613,7 +629,7 @@ mlxsw_sp_setup_tc_qdisc_prio_clean_stats stats_base->drops = 0; for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) { - stats_base->drops += xstats->tail_drop[i]; + stats_base->drops += mlxsw_sp_xstats_tail_drop(xstats, i); stats_base->drops += xstats->wred_drop[i]; }