[kwlug-disc] unclear about PCI/USB host bus and device addressing
Robert P. J. Day
rpjday at crashcourse.ca
Tue May 25 04:56:55 EDT 2010
On Mon, 24 May 2010, John Van Ostrand wrote:
> ----- "Robert P. J. Day" <rpjday at crashcourse.ca> wrote:
> > since i'm just about to rewrite some linux USB driver documentation,
> > i figure i should nail down the mechanics of PCI/USB addressing.
> > starting with PCI, as i've always understood it, a full PCI address
> > is
> > domain:bus:slot.func
> > where the "domain" part is irrelevant unless you have more than
> > one host bridge on your system.
> Out of curiosity I checked some of the beefiest servers we have in
> production and none of them have more than one PCI domain.
> Too bad you didn't ask two weeks ago, we just had really big
> multi-chassis servers in here which might have had more than one PCI
> domain. It may be a while until I have another pair to check out.
so we just have to wait until john gets a pair. ok, then ...
Robert P. J. Day Waterloo, Ontario, CANADA
Linux Consulting, Training and Kernel Pedantry.
Web page: http://crashcourse.ca
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