cpqphp and IOAPIC

cpqphp and IOAPIC

[Olivier Cremel]

It seems that cpqphp only works if the
machine is using PIC mode due to
the way cpqhp_set_irq() invokes the PCI BIOS.

Is it on purpose ? How to use cpqphp
on a machine using IOAPIC (SMP namely) ?

Thanks.



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Re: cpqphp and IOAPIC

[Greg KH]

On Mon, Jul 21, 2003 at 03:55:23PM -0700, Olivier Cremel wrote:
> It seems that cpqphp only works if the
> machine is using PIC mode due to
> the way cpqhp_set_irq() invokes the PCI BIOS.
> 
> Is it on purpose ? How to use cpqphp
> on a machine using IOAPIC (SMP namely) ?

Do you have such a machine?  What are the errors that happen when you
try to add a new pci card?

I've been curious at times about some of the irq assignment logic in
that driver, as it doesn't seem that some of the more complex conditions
are handled properly, but I haven't seen any failures in testing on the
hardware I have access to.

Oh, and there is a pci hotplug development mailing list, which is
probably much better place for this topic.

thanks,

greg k-h


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Re: cpqphp and IOAPIC

[Scott Murray]

On Tue, 22 Jul 2003, Greg KH wrote:

> On Mon, Jul 21, 2003 at 03:55:23PM -0700, Olivier Cremel wrote:
> > It seems that cpqphp only works if the
> > machine is using PIC mode due to
> > the way cpqhp_set_irq() invokes the PCI BIOS.
> > 
> > Is it on purpose ? How to use cpqphp
> > on a machine using IOAPIC (SMP namely) ?
> 
> Do you have such a machine?  What are the errors that happen when you
> try to add a new pci card?
> 
> I've been curious at times about some of the irq assignment logic in
> that driver, as it doesn't seem that some of the more complex conditions
> are handled properly, but I haven't seen any failures in testing on the
> hardware I have access to.

I don't know about cpqhp (it's been a while since I looked at it), but 
I've had to do some hacking to get interrupt assignment working with 
CompactPCI system master boards that have IO-APICs.  I'll probably float
a patch out after OLS.

> Oh, and there is a pci hotplug development mailing list, which is
> probably much better place for this topic.

I'm CC'ing it in this reply.  Olivier, please prune linux-hotplug-devel 
from your replies.

Scott

PS: Greg, if I see you (or maybe Russell and/or Ivan K.) there, I 
    wouldn't mind a little discussion on what the strategy should
    be for bus renumbering, as a lot of the new CPCI boards I'm
    seeing are going to need some form of it.


-- 
Scott Murray
SOMA Networks, Inc.
Toronto, Ontario
e-mail: scottm@somanetworks.com



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