From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Bigler Subject: DSA for the 88e6061 switch Date: Thu, 31 Mar 2011 09:35:09 +0200 Message-ID: <4D942EAD.9010102@keymile.com> Reply-To: stefan.bigler@keymile.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit To: netdev@vger.kernel.org Return-path: Received: from mail.ch.keymile.com ([193.17.201.103]:50286 "HELO mail.ch.keymile.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1750739Ab1CaHqR (ORCPT ); Thu, 31 Mar 2011 03:46:17 -0400 Sender: netdev-owner@vger.kernel.org List-ID: Hello, we would like to implement DSA for the 88e6061 switch, mainly to manage the phys of the various switch ports. Unfortunately, this switch seems only to supports the Marvell Header tagging mode but not the Trailer or DSA mode. The Header mode has the disadvantage, that the tagging bytes are inserted in*front* of the MAC header which most Ethernet controllers do not like because it's used for RX filtering and TX length padding. This could be worked around by using promiscuous mode and doing TX length padding in software, but that's not a really good solution. This rises the following questions: - Are there other tagging methods which could be used for the 88e6061 switch? - Is there an interface to manage the phys of the various ports *without* an associated netdev device, e.g. using ethtool directly over the mdio bus? Any help is appreciated. Thanks, Stefan