net: netcp: add api to support set rx mode in netcp modules

This patch adds an API to support setting rx mode in
netcp modules.  If a netcp module needs to be notified
when upper layer transitions from one rx mode to
another and react accordingly, such a module will implement
the new API set_rx_mode added in this patch.  Currently
rx modes supported are PROMISCUOUS and NON_PROMISCUOUS
modes.
Signed-off-by: WingMan Kwok <w-kwok2@ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ti/netcp.h

@@ -214,6 +214,7 @@ struct netcp_module {
 	int	(*add_vid)(void *intf_priv, int vid);
 	int	(*del_vid)(void *intf_priv, int vid);
 	int	(*ioctl)(void *intf_priv, struct ifreq *req, int cmd);
+	int	(*set_rx_mode)(void *intf_priv, bool promisc);
 
 	/* used internally */
 	struct list_head	module_list;

drivers/net/ethernet/ti/netcp_core.c

@@ -1509,6 +1509,24 @@ static void netcp_addr_sweep_add(struct netcp_intf *netcp)
 	}
 }
 
+static int netcp_set_promiscuous(struct netcp_intf *netcp, bool promisc)
+{
+	struct netcp_intf_modpriv *priv;
+	struct netcp_module *module;
+	int error;
+
+	for_each_module(netcp, priv) {
+		module = priv->netcp_module;
+		if (!module->set_rx_mode)
+			continue;
+
+		error = module->set_rx_mode(priv->module_priv, promisc);
+		if (error)
+			return error;
+	}
+	return 0;
+}
+
 static void netcp_set_rx_mode(struct net_device *ndev)
 {
 	struct netcp_intf *netcp = netdev_priv(ndev);
@@ -1538,6 +1556,7 @@ static void netcp_set_rx_mode(struct net_device *ndev)
 	/* finally sweep and callout into modules */
 	netcp_addr_sweep_del(netcp);
 	netcp_addr_sweep_add(netcp);
+	netcp_set_promiscuous(netcp, promisc);
 	spin_unlock(&netcp->lock);
 }