Messages in this thread | | | Date | Wed, 17 Dec 2003 18:06:17 -0500 | From | Alan Cox <> | Subject | Re: PCI Express support for 2.4 kernel |
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On Wed, Dec 17, 2003 at 09:22:35AM +0100, Arjan van de Ven wrote: > > Any PCI-Ex drivers would obviously _know_ they are PCI Ex, and they > > could communicate that by virtue of simply using new functions. Older > > drivers for older hardware would use the old API and not care... > > Further, PCI-Ex operations are already basically readl/writel anyway, so > > going through the forest of pci_cfg_ops pointers and such would just add > > needless layering. > > BUT powermanagement and co will need to potentially do stuff too with the > config space...
And X11 will want to access it via /proc interfaces. And someone will eventually go and design a different way to access PCI-EX for their hardware 8)
The PCI layer is a nice abstraction and config space is slow anyway
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