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=-7.4 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,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 DF14CC4363A for ; Mon, 26 Oct 2020 22:37:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 950622075B for ; Mon, 26 Oct 2020 22:37:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="aMxEZYT2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2394565AbgJZWhX (ORCPT ); Mon, 26 Oct 2020 18:37:23 -0400 Received: from m42-4.mailgun.net ([69.72.42.4]:26692 "EHLO m42-4.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2394551AbgJZWhW (ORCPT ); Mon, 26 Oct 2020 18:37:22 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1603751841; h=Content-Transfer-Encoding: Content-Type: In-Reply-To: MIME-Version: Date: Message-ID: From: References: Cc: To: Subject: Sender; bh=y1i8qtqfp0ZdnHugW/F30HmEn1D4bAHJAO0sjejblDA=; b=aMxEZYT2oT06MYHNHORvlxehyIxIBtyivOo/mEGtp0ZxJAjjb1rumQf4q0hqUvutu6tISK1i c3uBhDxvMmfu8AcHPCa/dQc1KagnPZs2gHA52bZSvA24vrMlSnpWEJFOY6bPnJyI11LW+0wK u4vPbHZunvVddpZmGi3D4JZVJAs= X-Mailgun-Sending-Ip: 69.72.42.4 X-Mailgun-Sid: WyI0MWYwYSIsICJsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n07.prod.us-west-2.postgun.com with SMTP id 5f974f7e18530f07b72eba07 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 26 Oct 2020 22:36:46 GMT Sender: hemantk=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 7F7D3C433F0; Mon, 26 Oct 2020 22:36:46 +0000 (UTC) Received: from [10.46.162.249] (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: hemantk) by smtp.codeaurora.org (Postfix) with ESMTPSA id 79EA7C43382; Mon, 26 Oct 2020 22:36:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 79EA7C43382 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=hemantk@codeaurora.org Subject: Re: [PATCH v9 3/4] docs: Add documentation for userspace client interface To: Jeffrey Hugo , Dan Williams , Jakub Kicinski Cc: manivannan.sadhasivam@linaro.org, gregkh@linuxfoundation.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, bbhatt@codeaurora.org, loic.poulain@linaro.org, netdev@vger.kernel.org References: <1603495075-11462-1-git-send-email-hemantk@codeaurora.org> <1603495075-11462-4-git-send-email-hemantk@codeaurora.org> <20201025144627.65b2324e@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net> <4e4dc63d0a0b5a820f7a70e30e29746fd6735a96.camel@redhat.com> <7934e50d-72bd-f20a-54da-33f29c66c3fa@codeaurora.org> From: Hemant Kumar Message-ID: Date: Mon, 26 Oct 2020 15:36:45 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <7934e50d-72bd-f20a-54da-33f29c66c3fa@codeaurora.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/26/20 6:56 AM, Jeffrey Hugo wrote: > On 10/26/2020 7:46 AM, Dan Williams wrote: >> On Mon, 2020-10-26 at 07:38 -0600, Jeffrey Hugo wrote: >>> On 10/25/2020 3:46 PM, Jakub Kicinski wrote: >>>> On Fri, 23 Oct 2020 16:17:54 -0700 Hemant Kumar wrote: >>>>> +UCI driver enables userspace clients to communicate to external >>>>> MHI devices >>>>> +like modem and WLAN. UCI driver probe creates standard character >>>>> device file >>>>> +nodes for userspace clients to perform open, read, write, poll >>>>> and release file >>>>> +operations. >>>> >>>> What's the user space that talks to this? >>>> >>> >>> Multiple. >>> >>> Each channel has a different purpose.  There it is expected that a >>> different userspace application would be using it. >>> >>> Hemant implemented the loopback channel, which is a simple channel >>> that >>> just sends you back anything you send it.  Typically this is consumed >>> by >>> a test application. >>> >>> Diag is a typical channel to be consumed by userspace.  This is >>> consumed >>> by various applications that talk to the remote device for >>> diagnostic >>> information (logs and such). >> >> QMI too? >> Dan > > Interesting question.  My product doesn't use QMI.  I would expect that > all QMI runs through Router these days, but I am seeing some QMI > channels in the downstream source. > > Hemant, Do you know what is the usecase for the QMI0/QMI1 channels? > QMI0/QMI1 is used to send QMI message (control path) to bring the qmi rmnet data call. Thanks, Hemant -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project