[PATCH net-next 8/9] net: dsa: add cross-chip bridging operations

[Vivien Didelot]

Introduce crosschip_bridge_{join,leave} operations in the dsa_switch_ops
structure, which can be used by switches supporting interconnection.

Signed-off-by: Vivien Didelot <vivien.dide...@savoirfairelinux.com>
---
 include/net/dsa.h |  8 ++++++++
 net/dsa/switch.c  | 12 ++++++------
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 951b5e49e899..ffe56cc338fe 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -456,6 +456,14 @@ struct dsa_switch_ops {
                                   bool ingress);
        void    (*port_mirror_del)(struct dsa_switch *ds, int port,
                                   struct dsa_mall_mirror_tc_entry *mirror);
+
+       /*
+        * Cross-chip operations
+        */
+       int     (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index,
+                                        int port, struct net_device *br);
+       void    (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index,
+                                         int port, struct net_device *br);
 };
 
 struct dsa_switch_driver {
diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index 7b6f38e5fef6..ca6e26e514f0 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -20,9 +20,9 @@ static int dsa_switch_bridge_join(struct dsa_switch *ds,
        if (ds->index == info->sw_index && ds->ops->port_bridge_join)
                return ds->ops->port_bridge_join(ds, info->port, info->br);
 
-       if (ds->index != info->sw_index)
-               dev_dbg(ds->dev, "crosschip DSA port %d.%d bridged to %s\n",
-                       info->sw_index, info->port, netdev_name(info->br));
+       if (ds->index != info->sw_index && ds->ops->crosschip_bridge_join)
+               return ds->ops->crosschip_bridge_join(ds, info->sw_index,
+                                                     info->port, info->br);
 
        return 0;
 }
@@ -33,9 +33,9 @@ static int dsa_switch_bridge_leave(struct dsa_switch *ds,
        if (ds->index == info->sw_index && ds->ops->port_bridge_leave)
                ds->ops->port_bridge_leave(ds, info->port, info->br);
 
-       if (ds->index != info->sw_index)
-               dev_dbg(ds->dev, "crosschip DSA port %d.%d unbridged from %s\n",
-                       info->sw_index, info->port, netdev_name(info->br));
+       if (ds->index != info->sw_index && ds->ops->crosschip_bridge_leave)
+               ds->ops->crosschip_bridge_leave(ds, info->sw_index, info->port,
+                                               info->br);
 
        return 0;
 }
-- 
2.12.1