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SubjectRe: [patch 2.5] VGA IO on systems with multiple PCI IO domains
On Mon, Jan 27, 2003 at 06:55:04PM +0100, Benjamin Herrenschmidt wrote:
> Well, your example clearly limits us to one IO space for VGA, which
> might not be what we want. The problem also exist for some fbdev drivers
> which might need to tap the VGA IOs of a given PCI card (thus getting
> access to the "legacy" IOs of the bus the card is on).

You are right, I've already realized that. :-)
The struct pci_bus * arg to legacy_ioport_remap (maybe better
pci_legacy_ioport_remap) is really good idea, and it's perfectly
ok to pass NULL in the vgacon case - we are limited to only one
VGA console anyway.
After the PCI setup is done, pci_legacy_ioport_remap(pbus, &legacy_resource)
would solve any problem I can think of, including multiple ISA bridges.

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