Re: [patch 2.5] 2-pass PCI probing, generic part

[Ivan Kokshaysky]

On Fri, Jan 10, 2003 at 11:00:30AM -0800, Grant Grundler wrote:
> Or dynamically assigns windows to PCI Bus controllers as PCI devices
> are brought on-line.

Eh? In general case, to make room for newly added device, you have
to shutdown the whole PCI bus starting from level 0, reassign _all_
BARs and bridge windows and then restart...
The "hotplug resource reservation" is the only viable approach, it has
been discussed numerous times.

> For PCI Hotplug, the role of managing MMIO/IRQ
> resources has moved to the OS since these services are needed
> after the OS has taken control of the box.

100% agree. :-)

> One 256MB BAR isn't so bad. It's when the customer wants to have a central
> server that has 2 or more such cards...64-bit BARs on 64-bit architecture
> make life alot easier.

I believe 1GB is a theoretical maximum for a 32-bit BAR. Everything above
that has to be 64-bit.

Ivan.