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=-5.1 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,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 0957CC4742C for ; Sat, 14 Nov 2020 02:57:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B114A22249 for ; Sat, 14 Nov 2020 02:57:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Hqw9Mg+a" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726116AbgKNC5J (ORCPT ); Fri, 13 Nov 2020 21:57:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35098 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725981AbgKNC5I (ORCPT ); Fri, 13 Nov 2020 21:57:08 -0500 Received: from mail-pl1-x643.google.com (mail-pl1-x643.google.com [IPv6:2607:f8b0:4864:20::643]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A182BC0613D1; Fri, 13 Nov 2020 18:57:08 -0800 (PST) Received: by mail-pl1-x643.google.com with SMTP id s2so5450640plr.9; Fri, 13 Nov 2020 18:57:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=Y7PcyZ605gjOrpi73JwhlRzdDSnwawKE7lgwWDwY0Ro=; b=Hqw9Mg+aaiygTirEfZCJiA+t522Ga1uLgMtl8v8fuUZUKdA3mNuq4RFcuHS+Y50ZRj W1EtvR+sat++lIs3ej5mEU2zLyETftpP8KOKyHxU/Wy9SgxlDN8AV3XIu0klhdoP3W7O 4csEt4aG5SgsWaN7cLCjyB5FiQEh2zNS4GhgG1CQBIrFSYC//7GHUWU8JKnuAHFUfBxg 0BbDsMliqRNHsLi+OjqfsKGUZkR3jfzt9fzdSG0a5cEwByHbl8qwog/NzRCKjFdfj59g FTp8iIOlbE5qUTxjq5QJ0a346fu6MBuZSv9qhchrvsc8pEJJ4zaJt4AT0BbXtRi/hpQf AKdA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=Y7PcyZ605gjOrpi73JwhlRzdDSnwawKE7lgwWDwY0Ro=; b=DOwitqnMMgdQTlZe4Xm+TNPM0Pxyuj4fsxSkuoXLO3b9hvS1Oqk0zmXxZ9j5Iq24kc Nt4hsEtC8OlrxqNF2VbcQAqMRoRt2vsMZs0VHisS8awcIM1FpPwZs5QxudRqcD7NsoG0 rNTSKFUNuIARFcE1MOsAtxIFCiUUngUK08/+bvbm6QUPxs3X7NqrssOSkd/lvLE/wTMg d9OsRoZh+2Bpqo0XJ7SesDa5Rgfhj75J1VblEzQdxTZpCEp5uiFUPYmcN8K8MnBRAgu4 ObYBP7PqIaEUep3hJ9Xyf7ciActYyDrcXbjw0zZL1qy0Eno8MbhA/R468EqShf6zk5gL pBZg== X-Gm-Message-State: AOAM533aDSMNYPq/+NXM41/TK2hJbAra5mDvTP5tmvB7xGAlFPCShWQ8 vEe1dP6w+O7IL2F6zfvFSag= X-Google-Smtp-Source: ABdhPJxtU/Xk5xwDndF5Gfxi0O0JqOfhnJKCFD8uF/l3T4kxY6E+uhI+OSxRhqSn8AaxP8+cxUpiCQ== X-Received: by 2002:a17:90b:3648:: with SMTP id nh8mr5779223pjb.27.1605322628178; Fri, 13 Nov 2020 18:57:08 -0800 (PST) Received: from hoboy.vegasvil.org (c-73-241-114-122.hsd1.ca.comcast.net. [73.241.114.122]) by smtp.gmail.com with ESMTPSA id n68sm10989716pfn.161.2020.11.13.18.57.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Nov 2020 18:57:07 -0800 (PST) Date: Fri, 13 Nov 2020 18:57:04 -0800 From: Richard Cochran To: Vinicius Costa Gomes Cc: Miroslav Lichvar , intel-wired-lan@lists.osuosl.org, andre.guedes@intel.com, linux-pci@vger.kernel.org, netdev@vger.kernel.org, bhelgaas@google.com Subject: Re: [Intel-wired-lan] [PATCH next-queue v2 3/3] igc: Add support for PTP getcrosststamp() Message-ID: <20201114025704.GA15240@hoboy.vegasvil.org> References: <20201112093203.GH1559650@localhost> <87pn4i6svv.fsf@intel.com> <20201113032451.GB32138@hoboy.vegasvil.org> <87ima96pj1.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87ima96pj1.fsf@intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Fri, Nov 13, 2020 at 11:10:58AM -0800, Vinicius Costa Gomes wrote: > I am proposing a series that adds support for PCIe PTM (for the igc > driver), exporting the values via the PTP_SYS_OFFSET_PRECISE ioctl(). > > The way PTM works in the NIC I have, kind of forces me to start the PTM > dialogs during initialization, and they are kept running in background, > what the _PRECISE ioctl() does is basically collecting the most recent > measurement. What is a PTM? Why does a PTM have dialogs? Can it talk? Forgive my total ignorance! Thanks, Richard