Re: [dpdk-dev] [RFC PATCH 1/3] librte_ethdev: support device recovery event

[Thomas Monjalon <thomas@monjalon.net>]

12/03/2020 04:31, Kalesh Anakkur Purayil:
> On Wed, Mar 11, 2020 at 6:50 PM Thomas Monjalon <thomas@monjalon.net> wrote:
> > 22/01/2020 11:16, Kalesh A P:
> > > From: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
> > >
> > > Adding support for recovery event in rte_eth_event framework.
> > > FW error and FW reset conditions would be managed by PMD.
> > > In such cases, PMD would need recovery events to notify application
> > > about PMD has recovered from FW reset or FW error.
> > >
> > > Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
> > > Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
> > > Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
> > > ---
> > > --- a/lib/librte_ethdev/rte_ethdev.h
> > > +++ b/lib/librte_ethdev/rte_ethdev.h
> > > @@ -3015,6 +3015,7 @@ enum rte_eth_event_type {
> > >       RTE_ETH_EVENT_NEW,      /**< port is probed */
> > >       RTE_ETH_EVENT_DESTROY,  /**< port is released */
> > >       RTE_ETH_EVENT_IPSEC,    /**< IPsec offload related event */
> > > +     RTE_ETH_EVENT_RECOVERED, /**< port recovered from an error */
> >
> > What the application is supposed to do when receiving such event?
> >
> [Kalesh]:  RTE_ETH_EVENT_RECOVERED event is an indication to the
> application that PMD has recovered from the reset and is functional
> again(i.e control path and data path is up again). On receiving this event
> from PMD, application has to re-create any flow rules created prior to the
> reset.

How the application knows that flow rules were resetted?
Is there any other configuration resetted?
These informations must be explicit in the doxygen comments.