[Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Sebastian Herbszt]

The default iobase and irq for the ne2k_isa card are 0x300 and 9.
It should be possible to override both using the "-net" syntax like
"-net nic,model=ne2k_isa,irq=5,iobase=0x280".

- Sebastian

Re: [Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Markus Armbruster]

"Sebastian Herbszt" <herbszt@gmx.de> writes:

> The default iobase and irq for the ne2k_isa card are 0x300 and 9.
> It should be possible to override both using the "-net" syntax like
> "-net nic,model=ne2k_isa,irq=5,iobase=0x280".

-device ne2k_isa,irq=5,iobase=0x280

Re: [Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Gerd Hoffmann]

On 12/18/09 07:12, Markus Armbruster wrote:
> "Sebastian Herbszt"<herbszt@gmx.de>  writes:
>
>> The default iobase and irq for the ne2k_isa card are 0x300 and 9.
>> It should be possible to override both using the "-net" syntax like
>> "-net nic,model=ne2k_isa,irq=5,iobase=0x280".
>
> -device ne2k_isa,irq=5,iobase=0x280

Also needs vlan=0, otherwise you'll end up with an unconnected nic.

cheers,
   Gerd

Re: [Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Sebastian Herbszt]

Gerd Hoffmann wrote:
> On 12/18/09 07:12, Markus Armbruster wrote:
>> "Sebastian Herbszt"<herbszt@gmx.de>  writes:
>>
>>> The default iobase and irq for the ne2k_isa card are 0x300 and 9.
>>> It should be possible to override both using the "-net" syntax like
>>> "-net nic,model=ne2k_isa,irq=5,iobase=0x280".
>>
>> -device ne2k_isa,irq=5,iobase=0x280
> 
> Also needs vlan=0, otherwise you'll end up with an unconnected nic.

Shouldn't vlan have a default value of 0 like it does with the "-net" syntax?

- Sebastian

Re: [Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Anthony Liguori]

Sebastian Herbszt wrote:
> Gerd Hoffmann wrote:
>> On 12/18/09 07:12, Markus Armbruster wrote:
>>> "Sebastian Herbszt"<herbszt@gmx.de>  writes:
>>>
>>>> The default iobase and irq for the ne2k_isa card are 0x300 and 9.
>>>> It should be possible to override both using the "-net" syntax like
>>>> "-net nic,model=ne2k_isa,irq=5,iobase=0x280".
>>>
>>> -device ne2k_isa,irq=5,iobase=0x280
>>
>> Also needs vlan=0, otherwise you'll end up with an unconnected nic.
>
> Shouldn't vlan have a default value of 0 like it does with the "-net" 
> syntax?

No, you don't actually have to tie it to a vlan.

Regards,

Anthony Liguori

Re: [Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Sebastian Herbszt]

Anthony Liguori wrote:
> Sebastian Herbszt wrote:
>> Gerd Hoffmann wrote:
>>> On 12/18/09 07:12, Markus Armbruster wrote:
>>>> "Sebastian Herbszt"<herbszt@gmx.de>  writes:
>>>>
>>>>> The default iobase and irq for the ne2k_isa card are 0x300 and 9.
>>>>> It should be possible to override both using the "-net" syntax like
>>>>> "-net nic,model=ne2k_isa,irq=5,iobase=0x280".
>>>>
>>>> -device ne2k_isa,irq=5,iobase=0x280
>>>
>>> Also needs vlan=0, otherwise you'll end up with an unconnected nic.
>>
>> Shouldn't vlan have a default value of 0 like it does with the "-net" 
>> syntax?
> 
> No, you don't actually have to tie it to a vlan.

Actually you have to else networking doesn't work at all. Without specifying
"vlan" with the "-device" syntax you end up with vlan=<null> and not vlan=0
with "info qtree".

- Sebastian

Re: [Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Anthony Liguori]

Sebastian Herbszt wrote:
> Actually you have to else networking doesn't work at all. Without 
> specifying
> "vlan" with the "-device" syntax you end up with vlan=<null> and not 
> vlan=0
> with "info qtree".

-netdev type=tap,id=mynic -device ne2k_isa,irq=5,iobase=0x280,id=mynic

One of the changes in 0.12 allows for a network configuration that does 
not have the builtin hub (aka vlans).  This is really important for a 
number of reasons.  The main is that it allows for much more aggressive 
optimization without having to teach the vlan code how to deal with 
things like software GSO.

That might look awkward, but that's because it's designed to be used 
from a config file.  The config entry for that is:

  [device "mynic"]
    driver = "ne2k_isa"
    irq = "5"
    iobase = "0x280"

  [netdev "mynic"]
    type = "tap"

Which looks pretty nice IMHO.

Regards,

Anthony Liguori

Re: [Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Sebastian Herbszt]

Markus Armbruster wrote:
> "Sebastian Herbszt" <herbszt@gmx.de> writes:
> 
>> The default iobase and irq for the ne2k_isa card are 0x300 and 9.
>> It should be possible to override both using the "-net" syntax like
>> "-net nic,model=ne2k_isa,irq=5,iobase=0x280".
> 
> -device ne2k_isa,irq=5,iobase=0x280

Shouldn't this also be possible with the "-net" syntax? It does accept "addr"
which is pci specific.

- Sebastian

Re: [Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Anthony Liguori]

Sebastian Herbszt wrote:
> Markus Armbruster wrote:
>> "Sebastian Herbszt" <herbszt@gmx.de> writes:
>>
>>> The default iobase and irq for the ne2k_isa card are 0x300 and 9.
>>> It should be possible to override both using the "-net" syntax like
>>> "-net nic,model=ne2k_isa,irq=5,iobase=0x280".
>>
>> -device ne2k_isa,irq=5,iobase=0x280
>
> Shouldn't this also be possible with the "-net" syntax? It does accept 
> "addr"
> which is pci specific.

addr= is a hack.  It predates qdev-ification.

-device is now the preferred way to do this sort of thing.

Regards,

Anthony Liguori

Re: [Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Sebastian Herbszt]

Markus Armbruster wrote:
> "Sebastian Herbszt" <herbszt@gmx.de> writes:
> 
>> The default iobase and irq for the ne2k_isa card are 0x300 and 9.
>> It should be possible to override both using the "-net" syntax like
>> "-net nic,model=ne2k_isa,irq=5,iobase=0x280".
> 
> -device ne2k_isa,irq=5,iobase=0x280

If i specify "-net nic,model=pcnet" i end up only with a pcnet nic. With
the above syntax i get a e1000 and a ne2k_isa. It also loads the e1000 rom.

- Sebastian

Re: [Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Anthony Liguori]

Sebastian Herbszt wrote:
> Markus Armbruster wrote:
>> "Sebastian Herbszt" <herbszt@gmx.de> writes:
>>
>>> The default iobase and irq for the ne2k_isa card are 0x300 and 9.
>>> It should be possible to override both using the "-net" syntax like
>>> "-net nic,model=ne2k_isa,irq=5,iobase=0x280".
>>
>> -device ne2k_isa,irq=5,iobase=0x280
>
> If i specify "-net nic,model=pcnet" i end up only with a pcnet nic. With
> the above syntax i get a e1000 and a ne2k_isa. It also loads the e1000 
> rom.

Can you supply the full command lines.  I'm a little confused about what 
you're reporting.

Regards,

Anthony Liguori

Re: [Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Sebastian Herbszt]

Anthony Liguori wrote:
> Sebastian Herbszt wrote:
>> Markus Armbruster wrote:
>>> "Sebastian Herbszt" <herbszt@gmx.de> writes:
>>>
>>>> The default iobase and irq for the ne2k_isa card are 0x300 and 9.
>>>> It should be possible to override both using the "-net" syntax like
>>>> "-net nic,model=ne2k_isa,irq=5,iobase=0x280".
>>>
>>> -device ne2k_isa,irq=5,iobase=0x280
>>
>> If i specify "-net nic,model=pcnet" i end up only with a pcnet nic. With
>> the above syntax i get a e1000 and a ne2k_isa. It also loads the e1000 
>> rom.
> 
> Can you supply the full command lines.  I'm a little confused about what 
> you're reporting.

"qemu -device ne2k_isa,irq=10" and "info qtree" has e1000 and ne2k_isa.
"qemu -net nic,model=pcnet" and "info qtree" has only pcnet.

Maybe because of hw/pc.c:

        if (!pci_enabled || (nd->model && strcmp(nd->model, "ne2k_isa") == 0))
            pc_init_ne2k_isa(nd);
        else
            pci_nic_init_nofail(nd, "e1000", NULL);

- Sebastian

Re: [Qemu-devel] ne2k_isa: how to specify a custom iobase and irq?

[Markus Armbruster]

"Sebastian Herbszt" <herbszt@gmx.de> writes:

> Anthony Liguori wrote:
>> Sebastian Herbszt wrote:
>>> Markus Armbruster wrote:
>>>> "Sebastian Herbszt" <herbszt@gmx.de> writes:
>>>>
>>>>> The default iobase and irq for the ne2k_isa card are 0x300 and 9.
>>>>> It should be possible to override both using the "-net" syntax like
>>>>> "-net nic,model=ne2k_isa,irq=5,iobase=0x280".
>>>>
>>>> -device ne2k_isa,irq=5,iobase=0x280
>>>
>>> If i specify "-net nic,model=pcnet" i end up only with a pcnet nic. With
>>> the above syntax i get a e1000 and a ne2k_isa. It also loads the
>>> e1000 rom.
>>
>> Can you supply the full command lines.  I'm a little confused about
>> what you're reporting.
>
> "qemu -device ne2k_isa,irq=10" and "info qtree" has e1000 and ne2k_isa.
> "qemu -net nic,model=pcnet" and "info qtree" has only pcnet.

Unlike -net nic, -device doesn't suppress the default NIC.  Unfortunate.
You can get rid of it with -nodefaults, but that also rids you of other
default devices.

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