Re: [dpdk-dev] vf init issue with patch igb_uio: issue FLR during open and release of device file

["Hu, Xuekun" <xuekun.hu@intel.com>]

I met the same issue too, only with i40e 2.1.26 PF kernel driver. 

-----Original Message-----
From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Ferruh Yigit
Sent: Wednesday, September 13, 2017 7:04 PM
To: Shijith Thotton <shijith.thotton@caviumnetworks.com>; Yang, Qiming <qiming.yang@intel.com>; Gregory Etelson <gregory@weka.io>
Cc: dev@dpdk.org; Tan, Jianfeng <jianfeng.tan@intel.com>
Subject: Re: [dpdk-dev] vf init issue with patch igb_uio: issue FLR during open and release of device file

On 9/13/2017 11:48 AM, Shijith Thotton wrote:
> On Wed, Sep 13, 2017 at 07:51:30AM +0000, Yang, Qiming wrote:
>>    Hi, Shijith
>>
>>     
>>
>>    VF init error will happen after apply your patch, error log as below. If
>>    revert your commit, all things work well. And this issue is not only occur
>>    in i40 VF but also ixgbe.
>>
>>    Could you help to check it soon?
>>
>>     
>>
>>    [root@localhost app]# ./testpmd -c 7 -n 4 -- -i
>>
>>    EAL: Detected 10 lcore(s)
>>
>>    EAL: No free hugepages reported in hugepages-1048576kB
>>
>>    EAL: Probing VFIO support...
>>
>>    EAL: WARNING: cpu flags constant_tsc=yes nonstop_tsc=no -> using
>>    unreliable clock cycles !
>>
>>    EAL: PCI device 0000:00:03.0 on NUMA socket -1
>>
>>    EAL:   Invalid NUMA socket, default to 0
>>
>>    EAL:   probe driver: 8086:154c net_i40e_vf
>>
>>    i40evf_init_vf(): init_adminq failed: -53
>>
>>    i40evf_dev_init(): Init vf failed
>>
>>    EAL: Requested device 0000:00:03.0 cannot be used
>>
>>     
>>
>>    commit b58eedfc7dd57eef6d12e2c654a52c834f36084a
>>    Author: Shijith Thotton <shijith.thotton@caviumnetworks.com>
>>    Date: Fri Jul 7 16:43:51 2017 +0530
>>
>>    igb_uio: issue FLR during open and release of device file
>>
>>    Set UIO info device file operations open and release. Call pci reset
>>    function inside open and release to clear device state at start and end.
>>    Copied this behaviour from vfio_pci kernel module code. With this patch,
>>    it is not mandatory to issue FLR by PMD's during init and close.
>>
>>    Bus master enable and disable are added in open and release respectively
>>    to take care of device DMA.
>>
>>    Signed-off-by: Shijith Thotton <shijith.thotton@caviumnetworks.com>
>>    Reviewed-by: Jianfeng Tan <jianfeng.tan@intel.com>
>>    Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>
>>    Acked-by: Gregory Etelson <gregory@weka.io>
>>
>>     
>>
>>    Best Regard,
>>
>>    Yang Qiming
>>
>>     
> 
> Hi Yang Qiming,
> 
> We didn't face this issue while preparing patch. I think, Gregory 
> tested it for Intel NICs. Adding more people to the loop for help.
> 

I will try to reproduce the issue.

> Shijith
>