[dpdk-dev] Error running dpdk app: cannot open /dev/uio

[Malveeka Tewari]

I do have the uio and igb_uio modules loaded.
For my issue, I found a workaround by manually creating /dev/uio0 using
mknod.
But I still get the vfio error.

If I try "sudo modprobe vfio" but that gives an error that Module vfio not
found.
I tried looking for vfio.ko in the dpdk source tree as well but could not
find that module.
How can I install the vfio module?

Thanks!
Malveeka



On Tue, Dec 2, 2014 at 5:12 PM, Qiu, Michael <michael.qiu at intel.com> wrote:

> Hi Malveeka,
>
> To be sure that you should have [uio, igb_uio] or [uio, uio_pci_generic]
> or [vfio] module loaded.
>
> Thanks,
> Michael
> On 12/3/2014 5:44 AM, Malveeka Tewari wrote:
> > Hi
> >
> > I am trying to run the testpmd app as but I get the following errors:
> > EAL: VFIO could not be initialized
> > EAL: Cannot open /dev/uio0: No such file or directory
> > EAL: Error - exiting with code: 1
> >   Cause: Requested device 0000:07:00.0 cannot be used
> >
> > lsmod shows that the uio module is installed.
> > Is there anything that's missing?
> >
> > Thanks!
> > Malveeka
> >
> >
> >
> > Output on trying to run testpmd
> >
> > EAL: Detected 16 lcore(s)
> > *EAL:   cannot open VFIO container, error 2 (No such file or directory)*
> > *EAL: VFIO support could not be initialized*
> > EAL: Setting up memory...
> > EAL: Ask a virtual area of 0x200000 bytes
> > EAL: Virtual area found at 0x7fe66ac00000 (size = 0x200000)
> > EAL: Ask a virtual area of 0xffc00000 bytes
> > EAL: Virtual area found at 0x7fe56ae00000 (size = 0xffc00000)
> > EAL: Ask a virtual area of 0x200000 bytes
> > EAL: Virtual area found at 0x7fe56aa00000 (size = 0x200000)
> > EAL: Ask a virtual area of 0xfec00000 bytes
> > EAL: Virtual area found at 0x7fe46bc00000 (size = 0xfec00000)
> > EAL: Ask a virtual area of 0x400000 bytes
> > EAL: Virtual area found at 0x7fe46b600000 (size = 0x400000)
> > EAL: Ask a virtual area of 0x400000 bytes
> > EAL: Virtual area found at 0x7fe46b000000 (size = 0x400000)
> > EAL: Ask a virtual area of 0x400000 bytes
> > EAL: Virtual area found at 0x7fe46aa00000 (size = 0x400000)
> > EAL: Ask a virtual area of 0x400000 bytes
> > EAL: Virtual area found at 0x7fe46a400000 (size = 0x400000)
> > EAL: Ask a virtual area of 0x400000 bytes
> > EAL: Virtual area found at 0x7fe469e00000 (size = 0x400000)
> > EAL: Requesting 2048 pages of size 2MB from socket 0
> > EAL: Requesting 2048 pages of size 2MB from socket 1
> > EAL: TSC frequency is ~2266745 KHz
> > EAL: Master core 3 is ready (tid=6cedb800)
> > EAL: PCI device 0000:07:00.0 on NUMA socket -1
> > EAL:   probe driver: 8086:10fb rte_ixgbe_pmd
> >
> >
> > *EAL: Cannot open /dev/uio0: No such file or directoryEAL: Error -
> exiting
> > with code: 1  Cause: Requested device 0000:07:00.0 cannot be used*
> >
>
>