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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F006BC433EF for ; Fri, 22 Jul 2022 14:19:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Subject:Cc:To: From:Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=lu4/yNyw3+t/iUskJeu3Cu5z9hKNmHJZ22UIFayMvjU=; b=EEz3PIWMYdTisya32T/lfGAdU7 ZMH5loDfoV4HMGK9KIWbg3xFGFyO+3kXltVYf+PbryOCOHJi23qSQE0kumW461rKdkf+UIqvIuVwB 3THidR0uwME3V0bzUAEJYOP2XRRul4gxkhyitq1Ejv/WJZpu68KKe9DKiB5AReFHBnbMOx8ijsV3B 3tlxX8+D1WUD+KWNdxFXwewm7UMbr0Q8Y3l3lhbVfPwcYlsYoxrpZnKy9vc9mj5/blkQ/7aawqQpW TpGE2mkcQI+wSppRUx3SQ9I2r6tYdvTMp6KM1oc5xleNTu930d0ruauTmQUlkHDuDUwt55PcfELMo cc6Miw8Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oEtV5-0060Rk-J0; Fri, 22 Jul 2022 14:19:31 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oEtUr-005zzF-2J; Fri, 22 Jul 2022 14:19:18 +0000 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 ams.source.kernel.org (Postfix) with ESMTPS id 6B986B82917; Fri, 22 Jul 2022 14:19:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5CC1BC341C6; Fri, 22 Jul 2022 14:19:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1658499554; bh=MgM+cMYk0Gwmsorh6Dk3GwZiuKflFl6TUd0K9p3ouY8=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=Tk+CA2QiUv36zE/2P71sfKE8mgSSzorJmuK4eGnDVWK+KOUE/+4XO5atBa5trjoOj cX9Y6OP+ZLMBGOweqfMsnYrU9JV525ddvk8aL/pXlv0nM5YLrewVkaD2BejT8RGjAd Sa30cmL5iy3nwEJ6atHxstiOpPcWpluwd49AHp6Jyzbj/594tGCtZOBRhbaLfWTB65 Q8Vj2x5i8hhTgVSpnf8+7YxT7rD5Te9OXPAhw9HWkPmbfPSp6kryu2V56YMepFWThm szunL7kxT3osMyMyyyzlUXQz/ihcKjbqH0qQvVuBLAm5sZOnaPUeyRdlVeI+B8PZim fvQtP9ucycmxA== Date: Fri, 22 Jul 2022 16:19:05 +0200 From: Marek =?UTF-8?B?QmVow7pu?= To: "Russell King (Oracle)" Cc: Vladimir Oltean , Andrew Lunn , Heiner Kallweit , Alexandre Belloni , Alvin __ipraga , Andy Shevchenko , Claudiu Manoil , Daniel Scally , "David S. Miller" , DENG Qingfang , Eric Dumazet , Florian Fainelli , George McCollister , Greg Kroah-Hartman , Hauke Mehrtens , Heikki Krogerus , Jakub Kicinski , Kurt Kanzenbach , Landen Chao , Linus Walleij , linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Matthias Brugger , netdev@vger.kernel.org, Paolo Abeni , "Rafael J. Wysocki" , Sakari Ailus , Sean Wang , UNGLinuxDriver@microchip.com, Vivien Didelot , Woojung Huh Subject: Re: [PATCH net-next 3/6] net: dsa: add support for retrieving the interface mode Message-ID: <20220722161905.5d54685d@dellmb> In-Reply-To: References: <20220716123608.chdzbvpinso546oh@skbuf> <20220720224447.ygoto4av7odsy2tj@skbuf> <20220721134618.axq3hmtckrumpoy6@skbuf> <20220721151533.3zomvnfogshk5ze3@skbuf> <20220721192145.1f327b2a@dellmb> <20220721192145.1f327b2a@dellmb> <20220721182216.z4vdaj4zfb6w3emo@skbuf> <20220722145936.497ac73f@dellmb> X-Mailer: Claws Mail 3.19.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220722_071917_431027_1FE81586 X-CRM114-Status: GOOD ( 15.97 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On Fri, 22 Jul 2022 14:23:18 +0100 "Russell King (Oracle)" wrote: > On Fri, Jul 22, 2022 at 02:59:36PM +0200, Marek Beh=C3=BAn wrote: > > The 2.5GBASE-X PCS does not support Clause 37 Auto-Negotiation. > > Hence, the 1000BASE-X PCS is expected to have its Clause 37 > > Auto-Negotiation functionality disabled so that the /C/ ordered set > > will not be transmitted. If a 2.5GBASE-X PCS receives /C/ ordered > > set, then undefined behavior may occur. > > ... =20 >=20 > The reason that's probably stated is because there hasn't been any > standardisation of it, different implementations behave differently, > so they can't define a standard behaviour without breaking what's > already out there. I think they are also considering clause 73 AN, which is supported with 1000base-KX (if I am not mistaken). Maybe the intention was to use clause 73 with >1G speeds, and so they've forbid clause 37 on 2500base-x.