[Intel-wired-lan] [dev-queue PATCH] i40e: Sync link state between VFs and VF Port representors(VFPR).

[Bowers, AndrewX]

> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at lists.osuosl.org] On
> Behalf Of Sridhar Samudrala
> Sent: Thursday, September 01, 2016 1:30 PM
> To: intel-wired-lan at lists.osuosl.org; Fastabend, John R
> <john.r.fastabend at intel.com>; Singhai, Anjali <anjali.singhai at intel.com>;
> Duyck, Alexander H <alexander.h.duyck at intel.com>
> Subject: [Intel-wired-lan] [dev-queue PATCH] i40e: Sync link state between
> VFs and VF Port representors(VFPR).
> 
> This patch enables
> - reflecting the link state of VFPR based on VF admin state & link state
>   of VF based on admin state of VFPR.
> - bringing up/down the VFPR sends a notification to update VF link state.
> - bringing up/down the VF will cause the link state update of VFPR.
> - enable/disable VF link state via ndo_set_vf_link_state will update the
>   admin state of associated VFPR.
> 
>     PF: enp5s0f0, VFs: enp5s2,enp5s2f1 VFPRs:enp5s0f0-vf0, enp5s0f0-vf1
>     # modprobe i40e
>     # echo 2 > /sys/class/net/enp5s0f0/device/sriov_numvfs
> 
>     # ip link set enp5s2 up
>     # ip link set enp5s0f0-vf0 up
>     # ip link set enp5s0f0-vf1 up
> 
>     # ip link show enp5s0f0-vf0
> 215: enp5s0f0-vf0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
> fq_codel state UP mode DEFAULT group default qlen 1000
>     link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
> 
>     /* enp5s0f0-vf0 UP -> enp5s2 CARRIER ON */
>     # ip link show enp5s2
> 218: enp5s2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq
> state UP mode DEFAULT group default qlen 1000
>     link/ether ea:4d:60:bc:6f:85 brd ff:ff:ff:ff:ff:ff
> 
>     /* enp5s2f1 DOWN -> enp5s0f0-vf1 NO-CARRIER */
>     # ip link show enp5s0f0-vf1
> 216: enp5s0f0-vf1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500
> qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
>     link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
> 
>     # ip link set enp5s0f0-vf0 down
>     # ip link set enp5s2f1 up
> 
>     /* enp5s2 UP -> enp5s0f0-vf1 CARRIER ON */
>     # ip link show enp5s0f0-vf1
> 216: enp5s0f0-vf1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
> fq_codel state UP mode DEFAULT group default qlen 1000
>     link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
> 
>     /* enp5s0-vf0 DOWN -> enp5s2 NO_CARRIER */
>     # ip link show enp5s2
> 218: enp5s2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq
> state DOWN mode DEFAULT group default qlen 1000
>     link/ether ea:4d:60:bc:6f:85 brd ff:ff:ff:ff:ff:ff
> 
>     # ip -d link show enp5s0f0
> 213: enp5s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop portid
> 6805ca2e7268 state DOWN mode DEFAULT group default qlen 1000
>     link/ether 68:05:ca:2e:72:68 brd ff:ff:ff:ff:ff:ff promiscuity 0 addrgenmode
> eui64
>     vf 0 MAC 00:00:00:00:00:00, spoof checking on, link-state disable
>     vf 1 MAC 00:00:00:00:00:00, spoof checking on, link-state enable
> 
> Signed-off-by: Sridhar Samudrala <sridhar.samudrala at intel.com>
> ---
>  drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 33
> ++++++++++++++++++++++
>  1 file changed, 33 insertions(+)

Tested-by: Andrew Bowers <andrewx.bowers at intel.com>