On Thu, Jul 16, 2009 at 06:33:22PM +1000, Simon Horman wrote: > Sorry, it was me who sent the previous mail, not Jesse Barnes. > I didn't intend to pretend to be him :-( > > > Hi, > > > > I am having some trouble initialising the virtual functions > > of an intel 85276 NIC. > > > > The first problem that I see is that if I insert the igb > > module with max_vfs > 0 is the following: > > > > igb 0000:01:00.1: SR-IOV: bus number out of range > > > > I added some debugging messages to the relevant code > > and it seems that iov wants to add the vf to bus 2, > > but bus->subordiante is set to 1. That's interesting. I also have an 82576 and my VFs show up on the same bus as my PFs: 09:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01) 09:00.1 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01) 09:10.0 Ethernet controller: Intel Corporation 82576 Virtual Function (rev 01) 09:10.1 Ethernet controller: Intel Corporation 82576 Virtual Function (rev 01) ... 09:11.4 Ethernet controller: Intel Corporation 82576 Virtual Function (rev 01) 09:11.5 Ethernet controller: Intel Corporation 82576 Virtual Function (rev 01) I wonder if maybe the parent you've plugged the card into doesn't support ARI ... I can try swapping this card into a slot that doesn't support ARI and see what happens. In the meantime, you could look at lspci -vv of the parent PCI bridge and see if its DevCap2: and DevCtl2: lines are ARIFwd+ or ARIFwd-. > > If I disable this check (probably unwise, but I wanted to see what would > > happen), then the virtual function is indeed added on bus 2, and my > > lspci looks a bit like this: > > > > 01:00.0 Ethernet controller: Intel Corporation Device 10c9 (rev 01) > > 01:00.1 Ethernet controller: Intel Corporation Device 10c9 (rev 01) > > 02:10.0 Class ffff: Intel Corporation Device 10ca (rev ff) > > 02:10.1 Class ffff: Intel Corporation Device 10ca (rev ff) Possibly you need a newer lspci ... > > That is, each of the PFs (01:00.0 and 01:00.1) end up with one VF each. > > I ran this test with max_vfs=1. > > > > However, when I try to bring up one of these VFs using ifconfig, > > the kernel panics, as per the log below. > > > > Is this a know problem? Is there something peculiar about my hw, > > its an Intel 85276 plugged into an HP dc7800? Am I doing something wrong? I'm not terribly surprised to see the panic given the forcing you were trying to do ;-) -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
