From nobody Sun Sep 14 22:52:48 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0EBFC6FA82 for ; Tue, 13 Sep 2022 14:39:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234085AbiIMOjm (ORCPT ); Tue, 13 Sep 2022 10:39:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234310AbiIMOhA (ORCPT ); Tue, 13 Sep 2022 10:37:00 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6D2A7D4C; Tue, 13 Sep 2022 07:20:35 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id B7B8A614AE; Tue, 13 Sep 2022 14:20:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BD75CC433C1; Tue, 13 Sep 2022 14:20:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1663078807; bh=mgFFyXaY74fd6+ai08x3/o9YoSac6cNCdsPgw+DKyc0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aQ89IHknLrHd1XtydEgGmO9i0Ps0kGdfcRQhnaUuuaQFwWIQc1U8bBmq76cYsUyJj 1QVoO/kbjmrfnRjNhfZhh6in4JaPoX91Px/7ISz/t1lu7hkzqP0SggzOxpNWkFpKrR BNA3QJRupOz9S7oAbAVslKYW/d2vQn4czQm1Rrgc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mark Bloch , Chris Mi , Leon Romanovsky , Sasha Levin Subject: [PATCH 5.15 089/121] RDMA/mlx5: Set local port to one when accessing counters Date: Tue, 13 Sep 2022 16:04:40 +0200 Message-Id: <20220913140401.188658738@linuxfoundation.org> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220913140357.323297659@linuxfoundation.org> References: <20220913140357.323297659@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Chris Mi [ Upstream commit 74b30b3ad5cec95d2647e796d10137438a098bc1 ] When accessing Ports Performance Counters Register (PPCNT), local port must be one if it is Function-Per-Port HCA that HCA_CAP.num_ports is 1. The offending patch can change the local port to other values when accessing PPCNT after enabling switchdev mode. The following syndrome will be printed: # cat /sys/class/infiniband/rdmap4s0f0/ports/2/counters/* # dmesg mlx5_core 0000:04:00.0: mlx5_cmd_check:756:(pid 12450): ACCESS_REG(0x805) = op_mod(0x1) failed, status bad parameter(0x3), syndrome (0x1e5585) Fix it by setting local port to one for Function-Per-Port HCA. Fixes: 210b1f78076f ("IB/mlx5: When not in dual port RoCE mode, use provide= d port as native") Reviewed-by: Mark Bloch Signed-off-by: Chris Mi Link: https://lore.kernel.org/r/6c5086c295c76211169e58dbd610fb0402360bab.16= 61763459.git.leonro@nvidia.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/mlx5/mad.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/infiniband/hw/mlx5/mad.c b/drivers/infiniband/hw/mlx5/= mad.c index ec242a5a17a35..f6f2df855c2ed 100644 --- a/drivers/infiniband/hw/mlx5/mad.c +++ b/drivers/infiniband/hw/mlx5/mad.c @@ -166,6 +166,12 @@ static int process_pma_cmd(struct mlx5_ib_dev *dev, u3= 2 port_num, mdev =3D dev->mdev; mdev_port_num =3D 1; } + if (MLX5_CAP_GEN(dev->mdev, num_ports) =3D=3D 1) { + /* set local port to one for Function-Per-Port HCA. */ + mdev =3D dev->mdev; + mdev_port_num =3D 1; + } + /* Declaring support of extended counters */ if (in_mad->mad_hdr.attr_id =3D=3D IB_PMA_CLASS_PORT_INFO) { struct ib_class_port_info cpi =3D {}; --=20 2.35.1