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=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 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 661E1C2D0DB for ; Wed, 29 Jan 2020 13:35:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 120012071E for ; Wed, 29 Jan 2020 13:35:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="D03/xwCy" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726647AbgA2NfN (ORCPT ); Wed, 29 Jan 2020 08:35:13 -0500 Received: from pandora.armlinux.org.uk ([78.32.30.218]:40694 "EHLO pandora.armlinux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726069AbgA2NfM (ORCPT ); Wed, 29 Jan 2020 08:35:12 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=wxeUFLAMJRRXFDd8By5e4fuIBUVCs8tICzOb3hySSKY=; b=D03/xwCyZvQwdqaURGy9lMkVG Nt9i4FejBcsr4rq2uNdqJTK4IMl+mf8TOlApEG2+yVaZNFdhdQGkCX4mGFDm7irlrKve92Q6xpSqu bzSQNPTN+CsA9pjRF2AXMfQ9viW1AyOgDB6whBRheC6nAjidj+5pz67gLC/yuBZxh9M1BIV1FX0i4 jjGbkRls/btalXKvky4kkbUT7MVzpw0SaXWP4TKvrDnv1N+V29pOSP1kRQndapgsbgnPT49PwH9k9 PYTtiwzkrJESpf3FlOK/RIvpQ9i9d+y1OO+nmCPq8sud5O/XPp3p1Z7WKReIzNKu+8gvtCuRj4cDq K37m3c93A==; Received: from shell.armlinux.org.uk ([2001:4d48:ad52:3201:5054:ff:fe00:4ec]:33244) by pandora.armlinux.org.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1iwnUi-0005aK-NO; Wed, 29 Jan 2020 13:35:00 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1iwnUf-0003R4-6X; Wed, 29 Jan 2020 13:34:57 +0000 Date: Wed, 29 Jan 2020 13:34:57 +0000 From: Russell King - ARM Linux admin To: "Madalin Bucur (OSS)" Cc: Heiner Kallweit , "davem@davemloft.net" , "andrew@lunn.ch" , "f.fainelli@gmail.com" , "netdev@vger.kernel.org" , "ykaukab@suse.de" Subject: Re: [PATCH net-next 2/2] dpaa_eth: support all modes with rate adapting PHYs Message-ID: <20200129133457.GG25745@shell.armlinux.org.uk> References: <1579701573-6609-1-git-send-email-madalin.bucur@oss.nxp.com> <1579701573-6609-3-git-send-email-madalin.bucur@oss.nxp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Thu, Jan 23, 2020 at 07:20:58AM +0000, Madalin Bucur (OSS) wrote: > There has been a long email thread [1] related to this particular issue. > Please note USXGMII is one of the supported modes of the AQR PHYs but > unfortunately not a mode our SoC is capable to use. The DPAA 1 platforms > do not support USXGMII, they use a serial interface to the PHY, called > anywhere in the DPAA SoC and PHY datasheets XFI. We're left with "xgmii" > compatible in the device tree because that's what was available at the > time in the kernel for 10G and because in the SoC XGMII is the actual > MII that connects the MAC to the SoC internal blocks that are part of > the physical layer. Because we have an internal PCS, the DPAA SoC to > external PHY connection is a PHY-layer internal connection, that has > no official denomination derived from a standard. In the industry, this > is called XFI. People in industry call 1000BASE-X "SGMII" as well, despite SGMII being a Cisco modification of 1000BASE-X. They are compatible up to a point but they do not inter-operate. What terms industry uses does not make those terms correct, and does not mean we should continue their cockups. The same is true for the XFI. Get over it. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up