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=-4.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,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 D3A7AC07548 for ; Tue, 19 Jan 2021 18:27:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A4EFA22DFB for ; Tue, 19 Jan 2021 18:27:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726508AbhASQYf (ORCPT ); Tue, 19 Jan 2021 11:24:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49062 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731925AbhASQYF (ORCPT ); Tue, 19 Jan 2021 11:24:05 -0500 Received: from mail-oi1-x22e.google.com (mail-oi1-x22e.google.com [IPv6:2607:f8b0:4864:20::22e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 79593C061573 for ; Tue, 19 Jan 2021 08:23:22 -0800 (PST) Received: by mail-oi1-x22e.google.com with SMTP id q25so21713806oij.10 for ; Tue, 19 Jan 2021 08:23:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=G55tkmNFXpWNF0G4kidv1LOhDwnRGHoYTqEZ1cY0Eqc=; b=DhVfwyqBmc1AiBf/wD+FyjYytp4BUTH2VLlJDLkVixp3J7211eK/m6O3ZTfa3exXwP prd3LWNj+mMSuxBVcYW4efmtcROLtTVuNAsEap/+SKMNSVBgjDX2qwlE86snW/oKz5PI d0n3qZoQNbYNTIh7DNl7LxzqoELOTTGtWzJL/TFPf0DLGCaDeLYHtyaXe3xSZIIMet+S h+NMMmcouT2HEZ5bq+V9iHLm+GZJxoVPizWltgrAZ3rAKPl1CZzq3rBiObHQwBr92wrD +Ka0oEa2eHkhczqna9Ah90DzkRcta2og987gRp+s7ZiWdUX4axh3aw2qozOfHC9UNOY6 TomA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=G55tkmNFXpWNF0G4kidv1LOhDwnRGHoYTqEZ1cY0Eqc=; b=bNSxudKdhmJUhrFHybiar//zg0SxMxEHKpx8s+O/nS4g1aqo3ORkTNhtuxlv5s1S1/ gYXv7OhEuN7Uum4ykPhYAaASraF3tROJDSL9+lIcgV5WbMF6tU9XhhkSqx1a4Y+aw+LL 9Us2x9n01myzNRE//laLH0m2kRbpUEdJD16NhWGJbsBeu54MR8PDPuRBU3UIfG4X0GUD ZbvaAI8lMIpxwLzMqxZwwZJ8g0pE8KJ4B2bBOXqF33mV4G1MQvBh/td88hw34TLcw0jE nI24+Jndyb+R8EypOTu2UWLXg2kqw2NYpLkj1QY9G3FeBbKJsGnpYJFh9dpE33E1+4ix WMEQ== X-Gm-Message-State: AOAM530WqYMKPEJxf+dk2lKPna8K72PgF7x4Gy7GtzwgErL8ARA6Wcwc eKM4J7WU52rwSCYgjCrrN3E= X-Google-Smtp-Source: ABdhPJw5hSD6Jz5T7k5je3VWnZ52lO+9wjAbRth7x79j5z5tMR6ohe2URim2HMvnLJGrcWEJ3sBnlA== X-Received: by 2002:aca:1a17:: with SMTP id a23mr294686oia.120.1611073401961; Tue, 19 Jan 2021 08:23:21 -0800 (PST) Received: from Davids-MacBook-Pro.local ([8.6.112.213]) by smtp.googlemail.com with ESMTPSA id q6sm852300ota.44.2021.01.19.08.23.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 19 Jan 2021 08:23:21 -0800 (PST) Subject: Re: [patch net-next RFC 00/10] introduce line card support for modular switch To: Jiri Pirko , Andrew Lunn Cc: netdev@vger.kernel.org, davem@davemloft.net, kuba@kernel.org, jacob.e.keller@intel.com, roopa@nvidia.com, mlxsw@nvidia.com References: <20210113121222.733517-1-jiri@resnulli.us> <20210119115610.GZ3565223@nanopsycho.orion> From: David Ahern Message-ID: <42b4c13b-7605-948e-a68c-dcb568680988@gmail.com> Date: Tue, 19 Jan 2021 09:23:19 -0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:78.0) Gecko/20100101 Thunderbird/78.6.1 MIME-Version: 1.0 In-Reply-To: <20210119115610.GZ3565223@nanopsycho.orion> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 1/19/21 4:56 AM, Jiri Pirko wrote: > Thu, Jan 14, 2021 at 03:07:18AM CET, andrew@lunn.ch wrote: >>> $ devlink lc provision netdevsim/netdevsim10 lc 0 type card4ports >>> $ devlink lc >>> netdevsim/netdevsim10: >>> lc 0 state provisioned type card4ports >>> supported_types: >>> card1port card2ports card4ports >>> lc 1 state unprovisioned >>> supported_types: >>> card1port card2ports card4ports >> >> Hi Jiri >> >>> # Now activate the line card using debugfs. That emulates plug-in event >>> # on real hardware: >>> $ echo "Y"> /sys/kernel/debug/netdevsim/netdevsim10/linecards/0/active >>> $ ip link show eni10nl0p1 >>> 165: eni10nl0p1: mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000 >>> link/ether 7e:2d:05:93:d3:d1 brd ff:ff:ff:ff:ff:ff >>> # The carrier is UP now. >> >> What is missing from the devlink lc view is what line card is actually >> in the slot. Say if i provision for a card4port, but actually insert a >> card2port. It would be nice to have something like: > > I checked, our hw does not support that. Only provides info that > linecard activation was/wasn't successful. > There is no way for the supervisor / management card to probe and see what card is actually inserted in a given slot? That seems like a serious design deficiency. What about some agent running on the line card talking to an agent on the supervisor to provide that information?