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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 7F653C43381 for ; Thu, 18 Mar 2021 20:54:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 52F5164ECF for ; Thu, 18 Mar 2021 20:54:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233087AbhCRUx3 (ORCPT ); Thu, 18 Mar 2021 16:53:29 -0400 Received: from vps0.lunn.ch ([185.16.172.187]:35486 "EHLO vps0.lunn.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230368AbhCRUxT (ORCPT ); Thu, 18 Mar 2021 16:53:19 -0400 Received: from andrew by vps0.lunn.ch with local (Exim 4.94) (envelope-from ) id 1lMzdq-00BkAw-SU; Thu, 18 Mar 2021 21:53:14 +0100 Date: Thu, 18 Mar 2021 21:53:14 +0100 From: Andrew Lunn To: Stefan Chulski Cc: "kuba@kernel.org" , "netdev@vger.kernel.org" , "thomas.petazzoni@bootlin.com" , "davem@davemloft.net" , Nadav Haklai , Yan Markman , "linux-kernel@vger.kernel.org" , "linux@armlinux.org.uk" , "mw@semihalf.com" , "rmk+kernel@armlinux.org.uk" , "atenart@kernel.org" , "rabeeh@solid-run.com" Subject: Re: [EXT] Re: [V2 net-next] net: mvpp2: Add reserved port private flag configuration Message-ID: References: <1615481007-16735-1-git-send-email-stefanc@marvell.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > 2. CM3 code has very small footprint requirement, we cannot > implement the complete Serdes and PHY infrastructure that kernel > provides as part of CM3 application. Therefore I would like to > continue relying on kernel configuration for that. How can that work? How does Linux know when CM3 has up'ed the interface? How does CM3 know the status of the link? How does CM3 set its flow control depending on what auto-neg determines, etc? > 3. In some cases we need to dynamically switch the port "user" > between CM3 and kernel. So I would like to preserve this > functionality. And how do you synchronize between Linux and CM3 so you know how is using it and who cannot use it? Andrew