[ovs-discuss] ovs-2.8 Cannot open /dev/uio0

Shivaram Mysore shivaram.mysore at gmail.com
Tue Nov 14 04:49:44 UTC 2017


Is there a specific reason as to why you would want to use this version of
DPDK?  I have never had to check permission.

Also, igb is mainly for Intel NICs.  You are using a Broadcom NIC -
http://dpdk.org/doc/guides/nics/bnxt.html for driver info.  I think what
you have is a misconfiguration.

You may want to check out the scripts here
https://github.com/shivarammysore/faucetsdn-intel/tree/master/src/ubuntu/zesty/ovs_281
- to setup and configure DPDK.  I have only used Intel NICs.

Cheers!

On Mon, Nov 13, 2017 at 6:50 PM, 王嵘 <rong.wang at easystack.cn> wrote:

> hi, I'm using ovs2.8 with dpdk-17052, and the '*NetXtreme II BCM57810 10
> Gigabit Ethernet 168e*'.
> There comes the error, while I try to bind the NIC using igb_uio.
>
> 2017-11-14T02:25:18.400Z|00362|dpdk|INFO|EAL:   probe driver: 14e4:168e
> net_bnx2x
> 2017-11-14T02:25:18.400Z|00363|dpdk|ERR|EAL: Cannot open /dev/uio0:
> Permission denied
>
> Then I chmod the file, like "chmod 777 /dev/uio0",(but I dont think this
> is right way.)
> but there comes other files with the same error, and I also chmod them.
> And I do the actions:
> chmod 777 /sys/bus/pci/devices/0000:20:00.1/*
> chmod 777 /sys/class/uio/uio0/device/config
>
> Then , restart the ovs-dpdk,
> But, there comes the following error:
> 2017-11-14T02:40:05.436Z|8384580|dpdk|ERR|PMD: pci_read(): Can't read
> from PCI config space
> 2017-11-14T02:40:05.436Z|8384581|dpdk|ERR|PMD: pci_read(): Can't read
> from PCI config space
> 2017-11-14T02:40:05.436Z|8384582|dpdk|ERR|PMD: pci_read(): Can't read
> from PCI config space
> 2017-11-14T02:40:05.436Z|8384583|dpdk|ERR|PMD: pci_read(): Can't read
> from PCI config space
> 2017-11-14T02:40:05.436Z|8384584|dpdk|INFO|PMD: bnx2x_pci_get_caps():
> Failed to allocate memory
> 2017-11-14T02:40:05.436Z|8384585|dpdk|INFO|PMD: bnx2x_attach(): PCIe caps
> reading was failed
> 2017-11-14T02:40:05.436Z|8384586|dpdk|ERR|PMD: bnx2x_common_dev_init():
> bnx2x_attach failed (-12)
> 2017-11-14T02:40:05.436Z|8384587|dpdk|ERR|EAL: Requested device
> 0000:20:00.1 cannot be used
>
> So, why there comes the Permission prolem? And what should I do for the
> PCIe error? Or it is the NIC drivers' problem?
> Thanks a lot.
>
>
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