nfp: resync repr state when port table sync

If the NSP port table has been refreshed, resync the representor state
with the new port information. At the moment, this only entails looking
for invalid ports and killing off representors associated with them.

The repr instance becomes NULL which is safe since the app accessor
function for reprs returns NULL when it cannot access a repr.

Signed-off-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_main.c b/drivers/net/ethernet/netronome/nfp/nfp_net_main.c
index 0beb9b2..c505014 100644 (file)
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_main.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_main.c
@@ -611,6 +611,7 @@ int nfp_net_refresh_port_table_sync(struct nfp_pf *pf)
        struct nfp_eth_table *eth_table;
        struct nfp_net *nn, *next;
        struct nfp_port *port;
+       int err;
 
        lockdep_assert_held(&pf->lock);
 
@@ -640,6 +641,11 @@ int nfp_net_refresh_port_table_sync(struct nfp_pf *pf)
 
        kfree(eth_table);
 
+       /* Resync repr state. This may cause reprs to be removed. */
+       err = nfp_reprs_resync_phys_ports(pf->app);
+       if (err)
+               return err;
+
        /* Shoot off the ports which became invalid */
        list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
                if (!nn->port || nn->port->type != NFP_PORT_INVALID)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
index d540a9d..1bce8c1 100644 (file)
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
@@ -390,3 +390,50 @@ struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs)
 
        return reprs;
 }
+
+int nfp_reprs_resync_phys_ports(struct nfp_app *app)
+{
+       struct nfp_reprs *reprs, *old_reprs;
+       struct nfp_repr *repr;
+       int i;
+
+       old_reprs =
+               rcu_dereference_protected(app->reprs[NFP_REPR_TYPE_PHYS_PORT],
+                                         lockdep_is_held(&app->pf->lock));
+       if (!old_reprs)
+               return 0;
+
+       reprs = nfp_reprs_alloc(old_reprs->num_reprs);
+       if (!reprs)
+               return -ENOMEM;
+
+       for (i = 0; i < old_reprs->num_reprs; i++) {
+               if (!old_reprs->reprs[i])
+                       continue;
+
+               repr = netdev_priv(old_reprs->reprs[i]);
+               if (repr->port->type == NFP_PORT_INVALID)
+                       continue;
+
+               reprs->reprs[i] = old_reprs->reprs[i];
+       }
+
+       old_reprs = nfp_app_reprs_set(app, NFP_REPR_TYPE_PHYS_PORT, reprs);
+       synchronize_rcu();
+
+       /* Now we free up removed representors */
+       for (i = 0; i < old_reprs->num_reprs; i++) {
+               if (!old_reprs->reprs[i])
+                       continue;
+
+               repr = netdev_priv(old_reprs->reprs[i]);
+               if (repr->port->type != NFP_PORT_INVALID)
+                       continue;
+
+               nfp_app_repr_stop(app, repr);
+               nfp_repr_clean(repr);
+       }
+
+       kfree(old_reprs);
+       return 0;
+}

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h
index 32179ca..5d4d897 100644 (file)
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h
@@ -124,5 +124,6 @@ void
 nfp_reprs_clean_and_free_by_type(struct nfp_app *app,
                                 enum nfp_repr_type type);
 struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs);
+int nfp_reprs_resync_phys_ports(struct nfp_app *app);
 
 #endif /* NFP_NET_REPR_H */