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 6672CC56201 for ; Mon, 26 Oct 2020 23:23:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2CE3820809 for ; Mon, 26 Oct 2020 23:23:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="K6GExS91" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404610AbgJZXXS (ORCPT ); Mon, 26 Oct 2020 19:23:18 -0400 Received: from m42-4.mailgun.net ([69.72.42.4]:27803 "EHLO m42-4.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404593AbgJZXXS (ORCPT ); Mon, 26 Oct 2020 19:23:18 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1603754597; h=Content-Transfer-Encoding: Content-Type: In-Reply-To: MIME-Version: Date: Message-ID: From: References: Cc: To: Subject: Sender; bh=rkfjILLJaxqI/obAVbh6rCzjEuv5Rj8NXWFQMUhMDc4=; b=K6GExS91Z0LKk+AKQCHLKd4Td6bx5AdWTsOoL87WLZemwmwOC/XqG7yZqSeWhzvPFtyaaKik oDZAgTDrDG1bkLnvvPDoqeE3FwDZ6n2qDcPD2NmBHx6kP7OAJtLEK3gQHm/TaS2WLWFVjOw0 Bgsl2tV82DmwlF0tNjJBmaDT7jw= X-Mailgun-Sending-Ip: 69.72.42.4 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n03.prod.us-east-1.postgun.com with SMTP id 5f975a217c1cca52db63b218 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 26 Oct 2020 23:22:09 GMT Sender: hemantk=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 03DA2C433CB; Mon, 26 Oct 2020 23:22:09 +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 F037CC433C9; Mon, 26 Oct 2020 23:22:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org F037CC433C9 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: Jakub Kicinski , Jeffrey Hugo 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> <20201026155617.350c45ab@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net> From: Hemant Kumar Message-ID: Date: Mon, 26 Oct 2020 16:22:07 -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: <20201026155617.350c45ab@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Hi Jakub, On 10/26/20 3:56 PM, Jakub Kicinski wrote: > On Mon, 26 Oct 2020 07:38:46 -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). >> >> Sahara is another common channel that is usually used for the multistage >> firmware loading process. > > Thanks for the info, are there any open source tests based on the > loopback channel (perhaps even in tree?) > > Since that's the only channel enabled in this set its the only one > we can comment on. > i am not aware of any open source tests based on loopback channel. My testing includes multiple sessions of echo, cat etc using adb to confirm what is sent is received back. Loic is using UCI driver for his use case too. Loic, in case you have any use case (which is part of open source) which can use UCI driver, pls share that info ? I think as soon as UCI becomes part of the tree, more and more channels would get added to the driver having open source code for that from other folks in community (Loic would be one of them i guess). Thanks, Hemant -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project