From: Andrew Lunn <andrew@lunn.ch>
To: Potin Lai <potin.lai.pt@gmail.com>
Cc: Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Oliver Neukum <oliver@neukum.org>,
Samuel Mendoza-Jonas <sam@mendozajonas.com>,
Paul Fertser <fercerpav@gmail.com>,
Simon Horman <horms@kernel.org>,
linux-usb@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
Cosmo Chou <cosmo.chou@quantatw.com>,
Mike Hsieh <Mike_Hsieh@quantatw.com>,
Mik Lin <Mik.Lin@quantatw.com>,
Potin Lai <potin.lai@quantatw.com>,
Adrian Ambrozewicz <aambrozewicz@nvidia.com>
Subject: Re: [PATCH 1/2] net: usb: cdc_ether: add NCSI passthrough support
Date: Tue, 8 Sep 2026 15:54:59 +0200 [thread overview]
Message-ID: <8414bb12-1b9a-4d41-b9a5-20b60d5f9ce2@lunn.ch> (raw)
In-Reply-To: <CAGfYmwUTsqgDQCP1q=XxCyW=R+a61urg_Jnnw_3-oJfw_BU38Q@mail.gmail.com>
On Tue, Sep 08, 2026 at 08:45:36PM +0800, Potin Lai wrote:
> On Tue, Sep 8, 2026 at 2:17 AM Andrew Lunn <andrew@lunn.ch> wrote:
> >
> > > +/* NCSI operates at 100 Mbps */
> > > +#define NCSI_SPEED_BPS (100 * 1000000)
> >
> > Why 100Mbps? RGMII is often used, running at 1G.
> >
>
> Since the original NC-SI specification was designed based on the
> RMII protocol, simply set the speed to 100 Mbps as the default
> for this virtual USB link.
How is this used? You could look at the USB link and return 1.5Mbps,
12Mbps, 480MBps, 5Gbps, 10Gbps, ...
Andrew
next prev parent reply other threads:[~2026-09-08 13:55 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-07 12:15 [PATCH 0/2] net: add USB CDC Ethernet NCSI support and fix unregister UAF Potin Lai
2026-09-07 12:15 ` [PATCH 1/2] net: usb: cdc_ether: add NCSI passthrough support Potin Lai
2026-09-07 18:17 ` Andrew Lunn
2026-09-08 12:45 ` Potin Lai
2026-09-08 13:54 ` Andrew Lunn [this message]
2026-09-07 12:15 ` [PATCH 2/2] net/ncsi: fix use-after-free in ncsi_unregister_dev() Potin Lai
2026-09-07 18:23 ` [PATCH 0/2] net: add USB CDC Ethernet NCSI support and fix unregister UAF Andrew Lunn
2026-09-08 12:33 ` Potin Lai
2026-09-09 18:42 ` Andrew Lunn
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