linux-kernel - Re: [EXT] Re: [PATCH 0/8] ethosu: Add Arm Ethos-U driver

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Date:   Fri, 16 Jun 2023 13:11:30 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Alison Wang <alison.wang@....com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Leo Li <leoyang.li@....com>, Forrest Shi <xuelin.shi@....com>,
        "X.F. Ren" <xiaofeng.ren@....com>, Feng Guo <feng.guo@....com>
Subject: Re: [EXT] Re: [PATCH 0/8] ethosu: Add Arm Ethos-U driver

On Fri, Jun 16, 2023 at 10:47:56AM +0000, Alison Wang wrote:
> On Fri, Jun 16, 2023 at 08:26:28AM +0000, Alison Wang wrote:
> >
> > On Fri, Jun 16, 2023 at 01:59:05PM +0800, Alison Wang wrote:
> > > This series contains Arm's NPU Ethos-U driver for NXP i.MX93 platform.
> > >
> > > Ethos-U Linux driver is to provide an example of how a rich
> > > operating system like Linux can dispatch inferences to an Arm
> > > Cortex-M subsystem, consisting of an Arm Cortex-M and an Arm Ethos-U NPU.
> >
> > What is an "inference"?
> > [Alison Wang] The inference here means machine learning inference. It
> > is the process of running data points into a machine learning model to
> > calculate an output such as a single numerical score. For example, we
> > use this driver, user space application and Cortex-M firmware to complete an inference about image classification.
> 
> Nice, so why isn't this under drivers/accel/ then?  Does it not need that framework?
> [Alison Wang] This driver doesn't need that framework.

Odd quoting style...

Anyway, why not use that famework?  That's what that subsystem is for,
so you are going to have to document why this does not fit into that
model at all and you need your own interface instead.

thanks,

greg k-h