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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham 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 ABFFAC04AB6 for ; Fri, 31 May 2019 23:27:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7E11826F92 for ; Fri, 31 May 2019 23:27:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="ZNOteqQL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726518AbfEaX1u (ORCPT ); Fri, 31 May 2019 19:27:50 -0400 Received: from mail-pf1-f196.google.com ([209.85.210.196]:47088 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726653AbfEaX1u (ORCPT ); Fri, 31 May 2019 19:27:50 -0400 Received: by mail-pf1-f196.google.com with SMTP id y11so7052304pfm.13 for ; Fri, 31 May 2019 16:27:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=1mBjmLwOKlNkyYhM6oxRhsf42lMAXU/xAGOi1IdZboQ=; b=ZNOteqQLyqgc+QbRl7AXNIxJGN4xjDTgG6lWt6T6hJIAi2uw3z3Flh39L0EupY/Gdy aRQu8htEcM2guXKL3DiQ4okSSGGyunEAl9Vs6GRc1UEOfPAiDmQ8zPwoUqSNG0OYQVV6 EIib45uFU25OiqwIdyyh8xrqPokchZdfmTrwCmyplfHfbLDWbuuuOwUb+ovvtbfvhNA1 zjW6vzLAyANZQjQVAtJnOlbpyMIjpq149dUyltnV5NgU5IpF1Yk5dIVTcoGsrgrl27Ql 8PicUE4+rTtZi9T5oo0W1VHdKG2BtaIZImEFJFnrAmzM0oJR7kaWUvZ22S1Cz16LJR/k aIlw== 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=1mBjmLwOKlNkyYhM6oxRhsf42lMAXU/xAGOi1IdZboQ=; b=U5VQIwoFy9Qi3JNtxCsl5QfDFzg07iNmu/1KfnpVUZhXF0mGUMiZKOyKJYHK/gyLgY B8/k3D/DWXrQAWdRm17I2enQ7b2pmHU8YC82G6WwTdhoefm21doh/oI+d3Dv5m9CE2nM DqK6VsgAwkB9aCviY6PN8ZU49OHRamOWxu5mtViqEiisfRiN0QGI/HfPGNJ4HFREdUgf cPAZ+MBInzE3C+PTchPiFUIvio9hW341/KA0oMl0L6yKhhit+ys+C7VwJtvFevzvtoAK qcBjonDuNZTPQgtB6DJG7sPhUI3UN4jD8IicxjWt1LrJ2DjBxqDEuYS1LLNC3kZRnZYD wIZA== X-Gm-Message-State: APjAAAXQGB7MOxL17CD32VKx12ks1yc2zU/H2eJKelxhVTBqKzx9PAw2 1//reRrzsACwARKk3htG3A3cbQ== X-Google-Smtp-Source: APXvYqw/ryB+xTJ5eNyo0R0Rz5FbaRSXOb+hJAMPW6Ub79YQuTrjFf0b/mvOzSK2WWNJ4P0EduX3Cg== X-Received: by 2002:a17:90a:7147:: with SMTP id g7mr12603555pjs.42.1559345269878; Fri, 31 May 2019 16:27:49 -0700 (PDT) Received: from minitux (104-188-17-28.lightspeed.sndgca.sbcglobal.net. [104.188.17.28]) by smtp.gmail.com with ESMTPSA id u1sm7196808pfh.85.2019.05.31.16.27.48 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 31 May 2019 16:27:49 -0700 (PDT) Date: Fri, 31 May 2019 16:27:46 -0700 From: Bjorn Andersson To: Arnd Bergmann Cc: Alex Elder , Dan Williams , David Miller , Ilias Apalodimas , evgreen@chromium.org, Ben Chan , Eric Caruso , cpratapa@codeaurora.org, syadagir@codeaurora.org, Subash Abhinov Kasiviswanathan , abhishek.esse@gmail.com, Networking , DTML , Linux Kernel Mailing List , linux-soc@vger.kernel.org, Linux ARM , linux-arm-msm@vger.kernel.org Subject: Re: [PATCH v2 00/17] net: introduce Qualcomm IPA driver Message-ID: <20190531232746.GA25597@minitux> References: <20190531035348.7194-1-elder@linaro.org> <065c95a8-7b17-495d-f225-36c46faccdd7@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.11.3 (2019-02-01) Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On Fri 31 May 12:19 PDT 2019, Arnd Bergmann wrote: > On Fri, May 31, 2019 at 6:36 PM Alex Elder wrote: > > On 5/31/19 9:58 AM, Dan Williams wrote: > > > On Thu, 2019-05-30 at 22:53 -0500, Alex Elder wrote: [..] > > So basically, the purpose of the rmnet driver is to handle QMAP > > protocol connections, and right now that's what the modem provides. > > Do you have any idea why this particular design was picked? > >From what I've seen of QMAP it seems like a reasonable design choice to have a software component (rmnet) dealing with this, separate from the transport. And I think IPA is the 4th or 5th mechanism for transporting QMAP packets back and forth to the modem. Downstream rmnet is copyright 2007-, and I know of interest in bringing at least one of the other transports upstream. Regards, Bjorn