Re: VGA PCI IO port reservations

[Jeff Garzik <jgarzik@mandrakesoft.com>]

Russell King wrote:
> Jeff Garzik writes:
> > > For example, S3 cards typically use:
> > >
> > >  0x0102,  0x42e8,  0x46e8,  0x4ae8,  0x8180 - 0x8200,  0x82e8,  0x86e8,
> > >  0x8ae8,  0x8ee8,  0x92e8,  0x96e8,  0x9ae8,  0x9ee8,  0xa2e8,  0xa6e8,
> > >  0xaae8,  0xaee8,  0xb2e8,  0xb6e8,  0xbae8,  0xbee8,  0xe2e8,
> > >  0xff00 - 0xff44
>       ^^^^ PCI IO addresses

Oops, you're right :)


> If the driver isn't loaded, the port is still used by the hardware.  Therefore,
> it should be reserved independent of whether we have the driver loaded/in kernel
> or not.

That logic doesn't work.  If you believe that, then the core kernel
needs to be doing 100% of the request_region calls, right at bootup...

If XFree86 not fbdev is using the hardware, you can always have a stub
driver that does nothing but reserve the ports.  Remember, too, that the
ports claimed depend on register settings in the video card and PCI
config space..

	Jeff


-- 
Jeff Garzik             |
Building 1024           | The chief enemy of creativity is "good" sense
MandrakeSoft            |          -- Picasso
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