Messages in this thread | | | Date | Sat, 11 Jan 2003 14:39:47 -0500 (EST) | From | Scott Murray <> | Subject | Re: [patch 2.5] 2-pass PCI probing, generic part |
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On Sat, 11 Jan 2003, Ivan Kokshaysky wrote:
> 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. :-)
Since the lack of resource reservation currently is keeping CompactPCI hot insertion from working properly, I have a strong interest in getting something in place before 2.6. I've got a completely manual (kernel command-line parameter controlled) reservation patch[1] against 2.4 that I could start updating, but I've always thought there must be a more elegant way to do things than the somewhat crude fixup approach I used in it. I'm willing to try coding up something if you or anyone else have some ideas as to what would be an acceptable solution.
Thanks,
Scott
[1] look at the new file drivers/pci/setup-hp.c contained in: ftp://oss.somanetworks.com/pub/linux/cpci/v2.4/linux-2.4.19-cpci-20021107.diff.gz
-- Scott Murray SOMA Networks, Inc. Toronto, Ontario e-mail: scottm@somanetworks.com
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