linux-kernel - Re: [PATCH v9 3/4] docs: Add documentation for userspace client interface

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <7934e50d-72bd-f20a-54da-33f29c66c3fa@codeaurora.org>
Date:   Mon, 26 Oct 2020 07:56:33 -0600
From:   Jeffrey Hugo <jhugo@...eaurora.org>
To:     Dan Williams <dcbw@...hat.com>, Jakub Kicinski <kuba@...nel.org>,
        Hemant Kumar <hemantk@...eaurora.org>
Cc:     manivannan.sadhasivam@...aro.org, gregkh@...uxfoundation.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        bbhatt@...eaurora.org, loic.poulain@...aro.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH v9 3/4] docs: Add documentation for userspace client
 interface

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?

-- 
Jeffrey Hugo
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.