netdev - Re: [RFC PATCH net-next 9/9] ethtool: Add ability to flash transceiver modules' firmware

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Message-ID: <7039bd68-d972-46f6-8d8d-5388d9cff109@lunn.ch>
Date: Wed, 31 Jan 2024 17:30:48 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Danielle Ratson <danieller@...dia.com>
Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"davem@...emloft.net" <davem@...emloft.net>,
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	Ido Schimmel <idosch@...dia.com>
Subject: Re: [RFC PATCH net-next 9/9] ethtool: Add ability to flash
 transceiver modules' firmware

> > > How big are these firmware blobs?
> > >
> 
> The largest file I came across is 400K.

https://hack-gpon.org/ont-fs-com-gpon-onu-stick-with-mac/

Suggests that some GPON devices have 16MB of flash. Ideally we don't
want to map a 16MB firmware image into the kernel address space. A
high end switch could do it, but a typical OpenWRT 'cable modem' is
likely to have trouble.

     Andrew