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Message-ID: <4e4dc63d0a0b5a820f7a70e30e29746fd6735a96.camel@redhat.com>
Subject: Re: [PATCH v9 3/4] docs: Add documentation for userspace client
 interface
From:   Dan Williams <dcbw@redhat.com>
To:     Jeffrey Hugo <jhugo@codeaurora.org>,
        Jakub Kicinski <kuba@kernel.org>,
        Hemant Kumar <hemantk@codeaurora.org>
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
Date:   Mon, 26 Oct 2020 08:46:13 -0500
In-Reply-To: <e92a5a5b-ac62-a6d8-b6b4-b65587e64255@codeaurora.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>
         <e92a5a5b-ac62-a6d8-b6b4-b65587e64255@codeaurora.org>
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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

> Sahara is another common channel that is usually used for the
> multistage 
> firmware loading process.
>