pciconf -w

[Dirk-Willem van Gulik]

On Apr 17, 2008, at 2:36 AM, M. Warner Losh wrote:

> : > > Does anyone know how to trun off a pci device using pciconf -w ?
> .....
> : > > ath0 at pci0:3:0:0:       class=0x020000 card=0x058a1014  
> chip=0x1014168c
....
> : > >     cap 01[40] = powerspec 2  supports D0 D3  current D0
> : > >     cap 05[50] = MSI supports 1 message
> : > >     cap 10[60] = PCI-Express 1 legacy endpoint
> : > >     cap 11[90] = MSI-X supports 1 message in map 0x10
> : >
> : > Bug warner (imp at FreeBSD.org) for his devctl patch and use that  
> to turn it off.
> : >
> : Just out of curiosity... would setting  
> hw.pci.do_power_nodriver="3" and
> : unloading if_ath.ko do the trick?
>
> Yes.

Hmm - this does not work for me on a Soekris and in a Sony VAIO --  
even after down, sysctl and
unloading the driver it reports sitting in D0. Does this require  
certain support in the PCI controller ?

Dw