Subject: Re: NIC driver interface to kernel.
To: None <>
From: Jochen Kunz <>
List: tech-kern
Date: 12/14/2003 22:02:47
On Sat, 13 Dec 2003 14:05:49 -0800
Jonathan Stone <jonathan@DSG.Stanford.EDU> wrote:

> >By the time the driver gets it out of if_snd, it is in wire format.
> Except without a link-level CRC.=20
The i82596 does TX and RX CRC processing in hardware.=20

> If you support VLAN tagging. be similary careful about VLAN tag=20
> length and MTU/MRU.
VLAN tagging? ENOCLUE. Any hints about this topic?

> i.e,. if the hardware won't auto-pad, the driver should explicitly
> pad.=20
Padding can be done in hardware.

> BTW, the red Daemon book has a very good intro to most of this,=20
You mean chapter 12.4? It talks only about if_output.