From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Kosin Subject: Re: EG20T and Micrel KSZ9021 Gigabit Ethernet Date: Thu, 25 Oct 2012 16:52:26 -0400 Message-ID: <5089A68A.5000206@intcomgrp.com> References: <506F30A2.500@intcomgrp.com> <20121005195343.GA7083@electric-eye.fr.zoreil.com> <506F41FC.7080108@intcomgrp.com> <20121005210910.GA10931@electric-eye.fr.zoreil.com> <507D95A2.9090206@intcomgrp.com> <5089A17C.3000108@intcomgrp.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Cc: Francois Romieu , To: Veaceslav Falico Return-path: Received: from server104.appriver.com ([207.97.242.188]:2543 "EHLO server104.appriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935908Ab2JYUw3 (ORCPT ); Thu, 25 Oct 2012 16:52:29 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On 10/25/2012 4:49 PM, Veaceslav Falico wrote: > On Thu, Oct 25, 2012 at 10:30 PM, James Kosin wrote: >> On 10/16/2012 1:13 PM, James Kosin wrote: >>> Hmmm... interesting turn of events. >>> >>> The problem seems to be in 10 speed support. I hooked the Ethernet >>> PHY to a100TX port and don't get these errors. >>> >>> James >>> >>> On 10/5/2012 5:09 PM, Francois Romieu wrote: >>>> (please don't top post) >>>> >>>> James Kosin : >>>>> The driver is always reporting: >>>>> [...] pch_gbe: Transfer Carrier Sense Error >>>> You should send more information. Say dmesg, link stats (ip link), >>>> ethtool information, stats and offload settings. >>>> >>>> We have a small Micrel ksz9021 phy driver that the pch_gbe driver does >>>> not use and the latter pokes into some phy specific register (0x10) that >>>> the Micrel document does not include in its list of vendor registers... >>>> >>>> Does your motherboard vendor offer some linux driver ? >>>> >>>> /note to myself: pch_gbe should use standard mii.h registers instead >>>> of defining its own redundant set of registers. >>>> >>>> -- >>>> Ueimor >>>> >> Ueimor & All, >> >> The "Transfer Carrier Sense Error" seems to have been hardware related. >> I replaced with a 10/100Mbps device and the interface is working >> correctly now. My hardware engineer is going to look at the 10Mbps HUB >> later to find out what is going on with that piece of equipment; so, we >> know what to do when we have future issues. > Did you run pch_gbe on 1gbps? It might be also speed related, in my tests > the driver gave CRC errors only on high loads. > >> James I'm not planning on using 1Gbps ... we plan on limiting this by only advertising and attaching the connections needed for 10/100Mbps support.