[Intel-wired-lan] [PATCH v4 2/5] ice: add DCF cap negotiation and state machine

[Lu, Nannan]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org> On Behalf Of
> Haiyue Wang
> Sent: Wednesday, June 24, 2020 3:30 PM
> To: intel-wired-lan at lists.osuosl.org
> Cc: Li, Xiaoyun <xiaoyun.li at intel.com>
> Subject: [Intel-wired-lan] [PATCH v4 2/5] ice: add DCF cap negotiation and state
> machine
> 
> The trust VF0 needs to negotiate the DCF capability firstly. Then the PF driver
> may allow this VF to enter into DCF "ON" state if various checks are passed. In
> DCF "ON" state, the VF0 can send the AdminQ command to do advanced switch
> rules creation for other VFs.
> 
> If one of the VFs resets, its hardware VSI number may be changed, so the
> VF0 will enter into the DCF "BUSY" state immediately to avoid adding the wrong
> rule. After the reset is done, the DCF state is changed to "PAUSE"
> mode, and a DCF_VSI_MAP_UPDATE event will be sent to the VF0. This event
> notifies the VF0 to restart negotiating the DCF capability again.
> 
> Also the VF0 can exits the DCF service gracefully by issuing the virtual channel
> command OP_DCF_DISABLE.
> 
> The system administrator can disable the DCF service by changing the trust
> mode to untrusted.
> 
> Signed-off-by: Xiaoyun Li <xiaoyun.li at intel.com>
> Signed-off-by: Haiyue Wang <haiyue.wang at intel.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_dcf.c      | 77 +++++++++++++++++
>  drivers/net/ethernet/intel/ice/ice_dcf.h      | 24 ++++++
>  .../net/ethernet/intel/ice/ice_virtchnl_pf.c  | 85 ++++++++++++++++++-
>  include/linux/avf/virtchnl.h                  |  9 ++
>  4 files changed, 194 insertions(+), 1 deletion(-)
> 

Tested-by: Nannan Lu <nannan.lu at intel.com>

> --
> 2.27.0
> 
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