[dpdk-ci] Intel VFIO-PCI Driver Error -22

[Juraj Linkeš]

It's possible that vfio-pci is not loaded, /sys/bus/pci/drivers//unbind is missing vfio-pci in the path.

Try to modprobe vfio-pci and see whether it shows under /sys/bus/pci/drivers/.

If this is the case, then you may want to add vfio-pci to /etc/modules so that it gets loaded automatically on boot.

Juraj

> -----Original Message-----
> From: ci <ci-bounces at dpdk.org> On Behalf Of Brandon Lo
> Sent: Thursday, October 8, 2020 8:30 PM
> To: Ferruh Yigit <ferruh.yigit at intel.com>
> Cc: ci at dpdk.org; Chen, Zhaoyan <zhaoyan.chen at intel.com>; Tu, Lijuan
> <lijuan.tu at intel.com>; Xu, Qian Q <qian.q.xu at intel.com>
> Subject: Re: [dpdk-ci] Intel VFIO-PCI Driver Error -22
> 
> I may have sent that thanks email too early.
> 
> Vt-d is enabled now for both machines, but the same error -22 is still occurring in
> dmesg.
> 
> `/sys/kernel/iommu_groups/` is empty.
> Perhaps the kernel parameters are not being set properly?
> 
> Thanks,
> Brandon
> 
> On Thu, Oct 8, 2020 at 2:19 PM Brandon Lo <blo at iol.unh.edu> wrote:
> >
> > Thanks, I was not aware that the system had Vt-d disabled.
> >
> > On Thu, Oct 8, 2020 at 1:46 PM Ferruh Yigit <ferruh.yigit at intel.com> wrote:
> > >
> > > On 10/8/2020 5:51 PM, Brandon Lo wrote:
> > > > Hi everyone,
> > > >
> > > > I am having issues trying to bind both Intel Niantic and Fortville
> > > > NICs over to VFIO-PCI.
> > > > The machines are running Ubuntu 18.04 with kernel 4.15.0-55.
> > > > The dpdk-devbind.py tool outputs "Cannot bind to driver vfio-pci"
> > > > and "Cannot open /sys/bus/pci/drivers//unbind".
> > > >
> > > > The dmesg output contains "vfio-pci: probe of [PCI Address] failed
> > > > with error -22" whenever I try to bind it.
> > > > Both machines have "intel_iommu=on iommu=pt" in their kernel
> parameters.
> > > >
> > >
> > > Is 'Vt-d' enabled in the bios?
> > >
> > > What do you see under '/sys/kernel/iommu_groups/' folder?
> >
> >
> >
> > --
> >
> > Brandon Lo
> >
> > UNH InterOperability Laboratory
> >
> > 21 Madbury Rd, Suite 100, Durham, NH 03824
> >
> > blo at iol.unh.edu
> >
> > www.iol.unh.edu
> 
> 
> 
> --
> 
> Brandon Lo
> 
> UNH InterOperability Laboratory
> 
> 21 Madbury Rd, Suite 100, Durham, NH 03824
> 
> blo at iol.unh.edu
> 
> www.iol.unh.edu