netdevsim: Implement ndo_get_port_parent_id()

netdevsim only supports SWITCHDEV_ATTR_ID_PORT_PARENT_ID, which makes it a
great candidate to be converted to use the ndo_get_port_parent_id() NDO
instead of implementing switchdev_port_attr_get().

Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/netdevsim/netdev.c

@@ -22,7 +22,6 @@
 #include <net/netlink.h>
 #include <net/pkt_cls.h>
 #include <net/rtnetlink.h>
-#include <net/switchdev.h>
 
 #include "netdevsim.h"
 
@@ -148,26 +147,16 @@ static struct device_type nsim_dev_type = {
 	.release = nsim_dev_release,
 };
 
-static int
-nsim_port_attr_get(struct net_device *dev, struct switchdev_attr *attr)
+static int nsim_get_port_parent_id(struct net_device *dev,
+				   struct netdev_phys_item_id *ppid)
 {
 	struct netdevsim *ns = netdev_priv(dev);
 
-	switch (attr->id) {
-	case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
-		attr->u.ppid.id_len = sizeof(ns->sdev->switch_id);
-		memcpy(&attr->u.ppid.id, &ns->sdev->switch_id,
-		       attr->u.ppid.id_len);
-		return 0;
-	default:
-		return -EOPNOTSUPP;
-	}
+	ppid->id_len = sizeof(ns->sdev->switch_id);
+	memcpy(&ppid->id, &ns->sdev->switch_id, ppid->id_len);
+	return 0;
 }
 
-static const struct switchdev_ops nsim_switchdev_ops = {
-	.switchdev_port_attr_get	= nsim_port_attr_get,
-};
-
 static int nsim_init(struct net_device *dev)
 {
 	char sdev_ddir_name[10], sdev_link_name[32];
@@ -214,7 +203,6 @@ static int nsim_init(struct net_device *dev)
 		goto err_bpf_uninit;
 
 	SET_NETDEV_DEV(dev, &ns->dev);
-	SWITCHDEV_SET_OPS(dev, &nsim_switchdev_ops);
 
 	err = nsim_devlink_setup(ns);
 	if (err)
@@ -493,6 +481,7 @@ static const struct net_device_ops nsim_netdev_ops = {
 	.ndo_setup_tc		= nsim_setup_tc,
 	.ndo_set_features	= nsim_set_features,
 	.ndo_bpf		= nsim_bpf,
+	.ndo_get_port_parent_id	= nsim_get_port_parent_id,
 };
 
 static void nsim_setup(struct net_device *dev)