[dpdk-dev] unable to bind to vfio-pci

[Sarosh Arif]

On Thu, Sep 17, 2020 at 2:35 PM Burakov, Anatoly
<anatoly.burakov at intel.com> wrote:
>
> On 17-Sep-20 10:21 AM, Sarosh Arif wrote:
> > On Thu, Sep 17, 2020 at 2:17 PM Bruce Richardson
> > <bruce.richardson at intel.com> wrote:
> >>
> >> On Thu, Sep 17, 2020 at 11:52:58AM +0500, Sarosh Arif wrote:
> >>> I have been trying to bind to vfio-pci using usertools/dpdk-devbind.py
> >>> but am unable to do so. The reason behind this is that I am unable to
> >>> write in /sys/bus/pci/drivers/vfio-pci/bind. Upon searching solutions
> >>> I tried a couple of things such as setting iommu=pt and intel_iommu=on
> >>> and ensured vt-d is enabled.
> >>> Along with this I have made sure that the vfio-pci module is correctly
> >>> loaded. I have also tried
> >>>
> >>> chmod 666 /sys/bus/pci/drivers/vfio-pci/bind
> >>>
> >>> So that I have permissions to write in this file.
> >>>
> >>> The error I get when I use usertools/dpdk-devbind.py to bind is this:
> >>> Error: bind failed for 0000:b7:00.1 - Cannot bind to driver vfio-pci
> >>>
> >>> The details of 0000:b7:00.1 are as follows:
> >>> Ethernet Connection X722 for 10GBASE-T 37d2' if=eno6 drv=i40e
> >>>
> >>> I have also unbinded The pci bridge to which 0000:b7:00.1 was connected.
> >>>
> >>> What more can be done to resolve this?
> >>>
> >> Since you describe changing permissions on the "bind" file, are you trying
> >> to run dpdk-devbind.py as a non-root user? Does it work as root?
> > I am running it as a root user. It does not work as a root user.
> >
>
> Does "dmesg | tail" say anything of interest?
This is the output of dmesg | tail:
[136286.136271] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Down
[221230.023654] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Up 10 Gbps,
Flow Control: RX/TX
[221230.024134] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Down
[249273.956525] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Up 10 Gbps,
Flow Control: RX/TX
[249273.957003] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Down
[314864.386303] EXT4-fs (sda1): mounting ext3 file system using the
ext4 subsystem
[314867.734973] EXT4-fs (sda1): mounted filesystem with ordered data
mode. Opts: (null)
[332584.888223] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Up 10 Gbps,
Flow Control: RX/TX
[332584.888700] ixgbe 0000:65:00.0 enp101s0f0: NIC Link is Down
[358429.954026] VFIO - User Level meta-driver version: 0.3
>
> --
> Thanks,
> Anatoly