pci configuration registers

pci configuration registers

[Philippe Faes]

Hi Gang,

I've read how I can use fakephp to (virtually) remove an detect devices
on my PCI bus.
My problem now is: my (new) device doesn't have its PCI configuration
registers set. Normally this is done during boot, but since I hot-plug
it, they are not set. 
I think pci_setup_device does something similar, but this function is
not made visible to the modules. 

What is the proper way to automatically configure the PCI registers?

thanks

Philippe

-- 
ir. Philippe Faes
Ghent University - Department ELIS
Sint-Pietersnieuwstraat 41 -- B-9000 Gent
Tel:+32 9 264 95 25 - Fax:+32 9 264 35 94
    http://www.elis.UGent.be/~pfaes
ON5DEU   --   LPIC1  --  gpg-key:173720B6



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Re: pci configuration registers

[Greg KH]

On Tue, Mar 14, 2006 at 04:03:47PM +0100, Philippe Faes wrote:
> Hi Gang,
> 
> I've read how I can use fakephp to (virtually) remove an detect devices
> on my PCI bus.
> My problem now is: my (new) device doesn't have its PCI configuration
> registers set. Normally this is done during boot, but since I hot-plug
> it, they are not set. 
> I think pci_setup_device does something similar, but this function is
> not made visible to the modules. 
> 
> What is the proper way to automatically configure the PCI registers?

Use the pci hotplug controller interface :)

good luck,

greg k-h


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Re: pci configuration registers

[Philippe Faes]

On Tue, 2006-03-14 at 11:25 -0800, Greg KH wrote:
> On Tue, Mar 14, 2006 at 04:03:47PM +0100, Philippe Faes wrote:
> > Hi Gang,
> > 
> > I've read how I can use fakephp to (virtually) remove an detect devices
> > on my PCI bus.
> > My problem now is: my (new) device doesn't have its PCI configuration
> > registers set. Normally this is done during boot, but since I hot-plug
> > it, they are not set. 
> > I think pci_setup_device does something similar, but this function is
> > not made visible to the modules. 
> > 
> > What is the proper way to automatically configure the PCI registers?
> 
> Use the pci hotplug controller interface :)
> 
> good luck,
> 
> greg k-h
> 

And where do I look for the specific functions of interest?
I've been browsing through the kernel source a lot, but as you know the
kernel is pretty big (and not always well-documented).

Thanks


-- 
ir. Philippe Faes
Ghent University - Department ELIS
Sint-Pietersnieuwstraat 41 -- B-9000 Gent
Tel:+32 9 264 95 25 - Fax:+32 9 264 35 94
    http://www.elis.UGent.be/~pfaes
ON5DEU   --   LPIC1  --  gpg-key:173720B6



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Re: pci configuration registers

[Greg KH]

On Wed, Mar 15, 2006 at 08:49:14AM +0100, Philippe Faes wrote:
> On Tue, 2006-03-14 at 11:25 -0800, Greg KH wrote:
> > On Tue, Mar 14, 2006 at 04:03:47PM +0100, Philippe Faes wrote:
> > > Hi Gang,
> > > 
> > > I've read how I can use fakephp to (virtually) remove an detect devices
> > > on my PCI bus.
> > > My problem now is: my (new) device doesn't have its PCI configuration
> > > registers set. Normally this is done during boot, but since I hot-plug
> > > it, they are not set. 
> > > I think pci_setup_device does something similar, but this function is
> > > not made visible to the modules. 
> > > 
> > > What is the proper way to automatically configure the PCI registers?
> > 
> > Use the pci hotplug controller interface :)
> > 
> > good luck,
> > 
> > greg k-h
> > 
> 
> And where do I look for the specific functions of interest?
> I've been browsing through the kernel source a lot, but as you know the
> kernel is pretty big (and not always well-documented).

What specifically are you trying to do when you say that you "hotplug"
your new device?  Are you using fakephp to do this?  For a new device
that was just added to the system?  Or for a device that was just
removed by the same driver?

And what do you mean that "pci_setup_device is not made visible to the
modules"?  What modules?  You should not ever need to call that
function, as on its own, it is incomplete to set up a new pci device.
What is wrong with the pci_scan_single_device() call that fakephp makes?

Also, if you have further pci hotplug specific questions, there is a pci
hotplug mailing list with people on it that can help you out.

thanks,

greg k-h


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