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=-4.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 A2F25C433E2 for ; Thu, 10 Sep 2020 20:34:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4DBC1221E2 for ; Thu, 10 Sep 2020 20:34:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599770044; bh=7lYML09NJIhF4amEUFSTp7nrcxK75B3+CJqmxANN14U=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=j4efSq9tnN2PgMzfNUXqtRmNIJ0fdp6acuNRVIqWH1F2sf2lTUaWupr74wzhbWxvi rCkA1JkR37cRn5/g2p6Yf/g91KFQQFEBpNrTzdHzoPoG1Hla/fOG5C/GGAqce5s1/9 DeAI6FM+gV0g1dmXzgz5ABK7nXOKEu0r+UocNDX4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726846AbgIJUdk (ORCPT ); Thu, 10 Sep 2020 16:33:40 -0400 Received: from mail.kernel.org ([198.145.29.99]:56970 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726761AbgIJUbA (ORCPT ); Thu, 10 Sep 2020 16:31:00 -0400 Received: from kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com (unknown [163.114.132.6]) (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 EF6EA206E9; Thu, 10 Sep 2020 20:30:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599769860; bh=7lYML09NJIhF4amEUFSTp7nrcxK75B3+CJqmxANN14U=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=LQI2toSw+bXD2I63/ENGJ4v+j2dIiqm1jYDEiZJZg5iyxNKI1JlPwA3k8yL7821NY dnt3Ug+M8kKNN3m0LiaGUna3EM3SxH5A53R/ON189nmr+l4DWyhHFpCqSEefwwTbVK lzmzHJFFdglaEXO0XBJhT6Z+kPPCtU6xmGaQgdBc= Date: Thu, 10 Sep 2020 13:30:58 -0700 From: Jakub Kicinski To: Oded Gabbay Cc: "Linux-Kernel@Vger. Kernel. Org" , netdev@vger.kernel.org, SW_Drivers , Greg Kroah-Hartman , "David S. Miller" , Omer Shpigelman Subject: Re: [PATCH 12/15] habanalabs/gaudi: add debugfs entries for the NIC Message-ID: <20200910133058.0fe0f5e3@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> In-Reply-To: References: <20200910161126.30948-1-oded.gabbay@gmail.com> <20200910161126.30948-13-oded.gabbay@gmail.com> <20200910130138.6d595527@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> <20200910131629.65b3e02c@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 10 Sep 2020 23:17:59 +0300 Oded Gabbay wrote: > > Doesn't seem like this one shows any more information than can be > > queried with ethtool, right? > correct, it just displays it in a format that is much more readable You can cat /sys/class/net/$ifc/carrier if you want 0/1. > > > nic_mac_loopback > > > is to set a port to loopback mode and out of it. It's not really > > > configuration but rather a mode change. > > > > What is this loopback for? Testing? > > Correct. Loopback test is commonly implemented via ethtool -t