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

[Yang, Qiming]

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 at 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 at 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 at caviumnetworks.com>
Reviewed-by: Jianfeng Tan <jianfeng.tan at intel.com>
Acked-by: Ferruh Yigit <ferruh.yigit at intel.com>
Acked-by: Gregory Etelson <gregory at weka.io>

Best Regard,
Yang Qiming