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

["Yang, Qiming" <qiming.yang@intel.com>]

> -----Original Message-----
> From: Shijith Thotton [mailto:shijith.thotton@caviumnetworks.com]
> Sent: Wednesday, September 13, 2017 6:49 PM
> To: Yang, Qiming <qiming.yang@intel.com>; Gregory Etelson
> <gregory@weka.io>
> Cc: dev@dpdk.org; Tan, Jianfeng <jianfeng.tan@intel.com>; Yigit, Ferruh
> <ferruh.yigit@intel.com>
> Subject: Re: vf init issue with patch igb_uio: issue FLR during open and release of
> device file
> 
> 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.
> 
> Shijith

Thanks a lot, Shijith

Qiming