From owner-freebsd-net@freebsd.org Wed Nov 11 16:37:07 2015 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 81195A2C461 for ; Wed, 11 Nov 2015 16:37:07 +0000 (UTC) (envelope-from jfvogel@gmail.com) Received: from mail-yk0-x22a.google.com (mail-yk0-x22a.google.com [IPv6:2607:f8b0:4002:c07::22a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4070D181B; Wed, 11 Nov 2015 16:37:07 +0000 (UTC) (envelope-from jfvogel@gmail.com) Received: by ykdr82 with SMTP id r82so57271784ykd.3; Wed, 11 Nov 2015 08:37:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=UDQa4FwmOaD1OqGTki+JUH2yfEAo1NGJ1RiFPEzpkR4=; b=i9JAc5bgbyqO5mhHBNbZDgYPDM2f2Iluk+o3jrR+zvPyVJCKO1lZoitodP0fPeogYN 5cyxL3E4iMUGhUULVaXfWbPdODKz7UOlEyLXPi9RvBEa63pTmotTBwLDq86YvleNr2YY wX6rWE9HC4LlmPKkRz3ApML+jiJq7TBHZ+Bnew8NS2WSaOp6Fyh95vH2YXp5fdenoWYJ Eyqt4ufexK01LRLU+glSxhsC8HZzic28egocnaGodf1KGwfgui2wYlJEHvMbPQO7NaR7 SsEQ8H+rozFRWsPrreouByOSXk2o+CqcobRUH0/pvloQpQXDsOwDiNWpOSPKB40rzTQg 2RzQ== MIME-Version: 1.0 X-Received: by 10.129.129.68 with SMTP id r65mr10742047ywf.8.1447259826396; Wed, 11 Nov 2015 08:37:06 -0800 (PST) Received: by 10.37.20.10 with HTTP; Wed, 11 Nov 2015 08:37:06 -0800 (PST) In-Reply-To: References: <564357E0.1050002@freebsd.org> <56436A5F.4020102@multiplay.co.uk> Date: Wed, 11 Nov 2015 08:37:06 -0800 Message-ID: Subject: Re: Intel XL710 broken link down detection? From: Jack Vogel To: Ryan Stone Cc: Steven Hartland , "freebsd-net@freebsd.org" , Jack F Vogel Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Nov 2015 16:37:07 -0000 LOL, Damn, what's the world coming to when you can't trust them Linux guys :) Jack On Wed, Nov 11, 2015 at 8:31 AM, Ryan Stone wrote: > On Wed, Nov 11, 2015 at 11:18 AM, Steven Hartland > wrote: > >> Comparing this to the Linux driver which does detect the link down I've >> discovered it actually polls the link status by default in its watchdog. >> >> Disabling this with "ethtool --set-priv-flags eth1 LinkPolling off" and >> the Linux driver also fails to detect link down. >> >> So this seems like a firmware or even hardware bug where it should be >> reporting down events and the Linux driver has been updated to workaround >> the problem? > > > No, apparently the Linux devs just didn't read the datasheet closely > enough (and presumably the FreeBSD driver copied the mistake). There is a > mask of interrupt causes that works backwards from how one would expect; > you mask out events that you *don't* want rather than events that you do > want. Both the Linux and FreeBSD drivers pass a mask of events that they > want interrupts for (the only reason why it appears to work on link up is > that the the AN Completed event fires when link is up, as far as I can > tell). Try the following patch: > > https://people.freebsd.org/~rstone/patches/ixl_link_int.diff > >