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Date: Mon, 20 Jan 2014 17:22:29 +0100
From: Stefan Hajnoczi <stefanha@gmail.com>
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Subject: Re: [Qemu-devel] Simulate different network card vendors
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To: rajan pathak <rajanpatha34@gmail.com>
Cc: qemu-devel@nongnu.org

On Sat, Jan 18, 2014 at 09:19:43AM -0800, rajan pathak wrote:
> I am looking forward to emulate single-chip Ethernet controller.
> 
> I can find some of its source code online and it has two main part Ethernet
> PHY (any 1GB SGMII compatible)
> and Ethernet MAC .
> 
> So ,DO I need to simply put the corresponding source files of PHY and MAC
> in hw/net directory of QEMU?

I'm not sure what you mean.  Do you have source code for QEMU emulation
of the network card?

If you have some other source code like a driver for the card, or
emulation for the card but not for QEMU, then a lot more work would be
necessary to emulate the card in QEMU.

> Also ,do I need to take care of underlying Ethernet controller(of my
> machine where I am trying to do this) from
> Broadcom in any way?

QEMU uses mechanisms to send raw packets from userspace, like the
tun/tap driver that many OSes have.  Therefore the physical NIC doesn't
matter, it's abstracted by the tun/tap interface that the host kernel
provides.