linux-kernel - Re: [PATCH 12/15] habanalabs/gaudi: add debugfs entries for the NIC

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Message-ID: <CAFCwf11sXmBLLZsoAGTbnUVduy2oVqbO97tRGEFgHMckronOkA@mail.gmail.com>
Date:   Thu, 10 Sep 2020 23:33:14 +0300
From:   Oded Gabbay <oded.gabbay@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     "Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>,
        netdev@...r.kernel.org, SW_Drivers <SW_Drivers@...ana.ai>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "David S. Miller" <davem@...emloft.net>,
        Omer Shpigelman <oshpigelman@...ana.ai>
Subject: Re: [PATCH 12/15] habanalabs/gaudi: add debugfs entries for the NIC

On Thu, Sep 10, 2020 at 11:31 PM Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Thu, 10 Sep 2020 23:17:59 +0300 Oded Gabbay wrote:
> > > Doesn't seem like this one shows any more information than can be
> > > queried with ethtool, right?
> > correct, it just displays it in a format that is much more readable
>
> You can cat /sys/class/net/$ifc/carrier if you want 0/1.
>
> > > > nic_mac_loopback
> > > > is to set a port to loopback mode and out of it. It's not really
> > > > configuration but rather a mode change.
> > >
> > > What is this loopback for? Testing?
> >
> > Correct.
>
> Loopback test is commonly implemented via ethtool -t

ok, thanks for the feedback, we will take a look at it and update the patch.
Oded