Al 29/08/2012 14:13, En/na John Baldwin ha escrit:
On Wednesday, August 29, 2012 6:12:02 am Peter Jeremy wrote:
[Moving to -stable and adding jhb@ for his input]
On 2012-Aug-29 11:32:44 +0200, Gustau Pérez i Querol <gpe...@entel.upc.edu>
wrote:
Al 29/08/2012 11:02, En/na Peter Jeremy ha escrit:
On 2012-Aug-28 11:44:44 +0200, Gustau Pérez i Querol <gpe...@entel.upc.edu>
wrote:
I'm running FreeBSD 9.1 RC1/AMD64 with VirtualBox. The problem I'm
facing is that I can't use more than 8 network adapters plugged to the
virtual machine.
...
I don't know if it's a net@ problem or maybe it is a problem with
the emulated PCI-bridge and then stable@ should be contacted. Also, I'm
not sure if a real machine would support more than 8 network adapters or
not. Any hints would be appreciated.
I don't think I've ever used more than 6 physical NICs in a host but don't
know of any reason for >8 to not work.
Can you please post a "pciconf -lv" from FreeBSD and the equivalent
"lspci" from Linux. A FreeBSD verbose boot log might also help.
Sure. I'm attaching them to this mail. I hope the mailing list
doesn't eat them. If it does, I will post them online and send the URL
to the mailing list.
Ah.. lspci shows the 9th LANCE at 02:00.0. The verbose boot shows
FreeBSD finds pcib2 (at pci0 device 25.0) but doesn't see anything
on that bus. ISTR jhb@ will recognize that problem.
Silly firmware, VM, whatever it is. :) It's buggy.
pcib1: <PCI-PCI bridge> at device 24.0 on pci0
pcib1: domain 0
pcib1: secondary bus 1
pcib1: subordinate bus 2
pcib1: no prefetched decode
pcib1: Subtractively decoded bridge.
pci1: <PCI bus> on pcib1
pci1: domain=0, physical bus=1
pcib2: <PCI-PCI bridge> at device 25.0 on pci0
pcib2: domain 0
pcib2: secondary bus 2
pcib2: subordinate bus 3
pcib2: no prefetched decode
pcib2: Subtractively decoded bridge.
pci2: <PCI bus> on pcib2
pci2: domain=0, physical bus=2
This is indeed the problem. PCI bus 2 is "claimed" by both pcib1 and pcib2
since the VM author programmed the bridges incorrectly. In this case, the
subordinate bus should be "1" and "2", not "2" and "3". You could add a hack
to pci_pci.c to fix the subordinate bus on these bridges which should probably
fix this.
Reading the spec and according to the output of dmesg.verbose I do
agree with your diagnosis. Both PCI-Bridges are attached to upstream PCI
bus 0. And this the subordinate bus can't be bigger than the downstream
bus those bridges connect to. So the subordinate buses have to be "1"
and "2".
I'll try to hack vbox (thanks to Andriy) code to map the subordinate
bridges as they should.
Thanks for the hint!
Gustau
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O O O Gustau Pérez i Querol
O O O Departament d'Enginyeria Telemàtica
O O O Universitat Politècnica de Catalunya
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