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

[Malveeka Tewari <malveeka@gmail.com>]

Ohh ok .. thanks for the clarification :)

Malveeka

On Tue, Dec 2, 2014 at 5:36 PM, Qiu, Michael <michael.qiu@intel.com> wrote:

> On 12/3/2014 9:25 AM, Malveeka Tewari wrote:
> > 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?
>
> VFIO is supplied by kernel :)
> if you use uio then vfio can be ignored. It is just another way of
> things in new kernel(version > 3.6).
>
> Thanks,
> Michael
>
> >
> > Thanks!
> > Malveeka
> >
> >
> >
> > On Tue, Dec 2, 2014 at 5:12 PM, Qiu, Michael <michael.qiu@intel.com
> > <mailto:michael.qiu@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*
> >     >
> >
> >
>
>