net: dsa: add slave to port helper

Many portions of DSA core code require to get the dsa_port structure
corresponding to a slave net_device. For this purpose, introduce a
dsa_slave_to_port() helper.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 82 insertions, 85 deletions

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index f31737256f69..894602c88b09 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -72,8 +72,8 @@ static int dsa_slave_get_iflink(const struct net_device *dev)
 static int dsa_slave_open(struct net_device *dev)
 {
 	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_port *dp = p->dp;
 	struct net_device *master = dsa_master_netdev(p);
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 	int err;
 
 	if (!(master->flags & IFF_UP))
@@ -122,7 +122,7 @@ static int dsa_slave_close(struct net_device *dev)
 {
 	struct dsa_slave_priv *p = netdev_priv(dev);
 	struct net_device *master = dsa_master_netdev(p);
-	struct dsa_port *dp = p->dp;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 
 	if (dev->phydev)
 		phy_stop(dev->phydev);
@@ -246,14 +246,13 @@ dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 		   struct net_device *dev, struct net_device *filter_dev,
 		   int *idx)
 {
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 	struct dsa_slave_dump_ctx dump = {
 		.dev = dev,
 		.skb = skb,
 		.cb = cb,
 		.idx = *idx,
 	};
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_port *dp = p->dp;
 	int err;
 
 	err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
@@ -274,8 +273,7 @@ static int dsa_slave_port_attr_set(struct net_device *dev,
 				   const struct switchdev_attr *attr,
 				   struct switchdev_trans *trans)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_port *dp = p->dp;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 	int ret;
 
 	switch (attr->id) {
@@ -301,8 +299,7 @@ static int dsa_slave_port_obj_add(struct net_device *dev,
 				  const struct switchdev_obj *obj,
 				  struct switchdev_trans *trans)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_port *dp = p->dp;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 	int err;
 
 	/* For the prepare phase, ensure the full set of changes is feasable in
@@ -329,8 +326,7 @@ static int dsa_slave_port_obj_add(struct net_device *dev,
 static int dsa_slave_port_obj_del(struct net_device *dev,
 				  const struct switchdev_obj *obj)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_port *dp = p->dp;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 	int err;
 
 	switch (obj->id) {
@@ -351,8 +347,8 @@ static int dsa_slave_port_obj_del(struct net_device *dev,
 static int dsa_slave_port_attr_get(struct net_device *dev,
 				   struct switchdev_attr *attr)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 
 	switch (attr->id) {
 	case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
@@ -431,11 +427,11 @@ static void dsa_slave_get_drvinfo(struct net_device *dev,
 
 static int dsa_slave_get_regs_len(struct net_device *dev)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 
 	if (ds->ops->get_regs_len)
-		return ds->ops->get_regs_len(ds, p->dp->index);
+		return ds->ops->get_regs_len(ds, dp->index);
 
 	return -EOPNOTSUPP;
 }
@@ -443,11 +439,11 @@ static int dsa_slave_get_regs_len(struct net_device *dev)
 static void
 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 
 	if (ds->ops->get_regs)
-		ds->ops->get_regs(ds, p->dp->index, regs, _p);
+		ds->ops->get_regs(ds, dp->index, regs, _p);
 }
 
 static u32 dsa_slave_get_link(struct net_device *dev)
@@ -462,8 +458,8 @@ static u32 dsa_slave_get_link(struct net_device *dev)
 
 static int dsa_slave_get_eeprom_len(struct net_device *dev)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 
 	if (ds->cd && ds->cd->eeprom_len)
 		return ds->cd->eeprom_len;
@@ -477,8 +473,8 @@ static int dsa_slave_get_eeprom_len(struct net_device *dev)
 static int dsa_slave_get_eeprom(struct net_device *dev,
 				struct ethtool_eeprom *eeprom, u8 *data)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 
 	if (ds->ops->get_eeprom)
 		return ds->ops->get_eeprom(ds, eeprom, data);
@@ -489,8 +485,8 @@ static int dsa_slave_get_eeprom(struct net_device *dev,
 static int dsa_slave_set_eeprom(struct net_device *dev,
 				struct ethtool_eeprom *eeprom, u8 *data)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 
 	if (ds->ops->set_eeprom)
 		return ds->ops->set_eeprom(ds, eeprom, data);
@@ -501,8 +497,8 @@ static int dsa_slave_set_eeprom(struct net_device *dev,
 static void dsa_slave_get_strings(struct net_device *dev,
 				  uint32_t stringset, uint8_t *data)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 
 	if (stringset == ETH_SS_STATS) {
 		int len = ETH_GSTRING_LEN;
@@ -512,7 +508,7 @@ static void dsa_slave_get_strings(struct net_device *dev,
 		strncpy(data + 2 * len, "rx_packets", len);
 		strncpy(data + 3 * len, "rx_bytes", len);
 		if (ds->ops->get_strings)
-			ds->ops->get_strings(ds, p->dp->index, data + 4 * len);
+			ds->ops->get_strings(ds, dp->index, data + 4 * len);
 	}
 }
 
@@ -520,8 +516,9 @@ static void dsa_slave_get_ethtool_stats(struct net_device *dev,
 					struct ethtool_stats *stats,
 					uint64_t *data)
 {
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_switch *ds = dp->ds;
 	struct pcpu_sw_netstats *s;
 	unsigned int start;
 	int i;
@@ -543,13 +540,13 @@ static void dsa_slave_get_ethtool_stats(struct net_device *dev,
 		data[3] += rx_bytes;
 	}
 	if (ds->ops->get_ethtool_stats)
-		ds->ops->get_ethtool_stats(ds, p->dp->index, data + 4);
+		ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
 }
 
 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 
 	if (sset == ETH_SS_STATS) {
 		int count;
@@ -566,29 +563,29 @@ static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
 
 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 
 	if (ds->ops->get_wol)
-		ds->ops->get_wol(ds, p->dp->index, w);
+		ds->ops->get_wol(ds, dp->index, w);
 }
 
 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 	int ret = -EOPNOTSUPP;
 
 	if (ds->ops->set_wol)
-		ret = ds->ops->set_wol(ds, p->dp->index, w);
+		ret = ds->ops->set_wol(ds, dp->index, w);
 
 	return ret;
 }
 
 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 	int ret;
 
 	/* Port's PHY and MAC both need to be EEE capable */
@@ -598,7 +595,7 @@ static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
 	if (!ds->ops->set_mac_eee)
 		return -EOPNOTSUPP;
 
-	ret = ds->ops->set_mac_eee(ds, p->dp->index, e);
+	ret = ds->ops->set_mac_eee(ds, dp->index, e);
 	if (ret)
 		return ret;
 
@@ -613,8 +610,8 @@ static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
 
 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 	int ret;
 
 	/* Port's PHY and MAC both need to be EEE capable */
@@ -624,7 +621,7 @@ static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
 	if (!ds->ops->get_mac_eee)
 		return -EOPNOTSUPP;
 
-	ret = ds->ops->get_mac_eee(ds, p->dp->index, e);
+	ret = ds->ops->get_mac_eee(ds, dp->index, e);
 	if (ret)
 		return ret;
 
@@ -676,9 +673,9 @@ static void dsa_slave_poll_controller(struct net_device *dev)
 static int dsa_slave_get_phys_port_name(struct net_device *dev,
 					char *name, size_t len)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 
-	if (snprintf(name, len, "p%d", p->dp->index) >= len)
+	if (snprintf(name, len, "p%d", dp->index) >= len)
 		return -EINVAL;
 
 	return 0;
@@ -701,14 +698,15 @@ static int dsa_slave_add_cls_matchall(struct net_device *dev,
 				      struct tc_cls_matchall_offload *cls,
 				      bool ingress)
 {
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 	struct dsa_slave_priv *p = netdev_priv(dev);
 	struct dsa_mall_tc_entry *mall_tc_entry;
 	__be16 protocol = cls->common.protocol;
-	struct dsa_switch *ds = p->dp->ds;
 	struct net *net = dev_net(dev);
-	struct dsa_slave_priv *to_p;
+	struct dsa_switch *ds = dp->ds;
 	struct net_device *to_dev;
 	const struct tc_action *a;
+	struct dsa_port *to_dp;
 	int err = -EOPNOTSUPP;
 	LIST_HEAD(actions);
 	int ifindex;
@@ -741,13 +739,12 @@ static int dsa_slave_add_cls_matchall(struct net_device *dev,
 		mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
 		mirror = &mall_tc_entry->mirror;
 
-		to_p = netdev_priv(to_dev);
+		to_dp = dsa_slave_to_port(to_dev);
 
-		mirror->to_local_port = to_p->dp->index;
+		mirror->to_local_port = to_dp->index;
 		mirror->ingress = ingress;
 
-		err = ds->ops->port_mirror_add(ds, p->dp->index, mirror,
-					       ingress);
+		err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
 		if (err) {
 			kfree(mall_tc_entry);
 			return err;
@@ -762,9 +759,9 @@ static int dsa_slave_add_cls_matchall(struct net_device *dev,
 static void dsa_slave_del_cls_matchall(struct net_device *dev,
 				       struct tc_cls_matchall_offload *cls)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 	struct dsa_mall_tc_entry *mall_tc_entry;
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_switch *ds = dp->ds;
 
 	if (!ds->ops->port_mirror_del)
 		return;
@@ -777,8 +774,7 @@ static void dsa_slave_del_cls_matchall(struct net_device *dev,
 
 	switch (mall_tc_entry->type) {
 	case DSA_PORT_MALL_MIRROR:
-		ds->ops->port_mirror_del(ds, p->dp->index,
-					 &mall_tc_entry->mirror);
+		ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror);
 		break;
 	default:
 		WARN_ON(1);
@@ -855,25 +851,25 @@ static void dsa_slave_get_stats64(struct net_device *dev,
 static int dsa_slave_get_rxnfc(struct net_device *dev,
 			       struct ethtool_rxnfc *nfc, u32 *rule_locs)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 
 	if (!ds->ops->get_rxnfc)
 		return -EOPNOTSUPP;
 
-	return ds->ops->get_rxnfc(ds, p->dp->index, nfc, rule_locs);
+	return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
 }
 
 static int dsa_slave_set_rxnfc(struct net_device *dev,
 			       struct ethtool_rxnfc *nfc)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 
 	if (!ds->ops->set_rxnfc)
 		return -EOPNOTSUPP;
 
-	return ds->ops->set_rxnfc(ds, p->dp->index, nfc);
+	return ds->ops->set_rxnfc(ds, dp->index, nfc);
 }
 
 static const struct ethtool_ops dsa_slave_ethtool_ops = {
@@ -933,8 +929,9 @@ static struct device_type dsa_type = {
 
 static void dsa_slave_adjust_link(struct net_device *dev)
 {
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_switch *ds = dp->ds;
 	unsigned int status_changed = 0;
 
 	if (p->old_link != dev->phydev->link) {
@@ -953,7 +950,7 @@ static void dsa_slave_adjust_link(struct net_device *dev)
 	}
 
 	if (ds->ops->adjust_link && status_changed)
-		ds->ops->adjust_link(ds, p->dp->index, dev->phydev);
+		ds->ops->adjust_link(ds, dp->index, dev->phydev);
 
 	if (status_changed)
 		phy_print_status(dev->phydev);
@@ -962,14 +959,14 @@ static void dsa_slave_adjust_link(struct net_device *dev)
 static int dsa_slave_fixed_link_update(struct net_device *dev,
 				       struct fixed_phy_status *status)
 {
-	struct dsa_slave_priv *p;
 	struct dsa_switch *ds;
+	struct dsa_port *dp;
 
 	if (dev) {
-		p = netdev_priv(dev);
-		ds = p->dp->ds;
+		dp = dsa_slave_to_port(dev);
+		ds = dp->ds;
 		if (ds->ops->fixed_link_update)
-			ds->ops->fixed_link_update(ds, p->dp->index, status);
+			ds->ops->fixed_link_update(ds, dp->index, status);
 	}
 
 	return 0;
@@ -978,8 +975,9 @@ static int dsa_slave_fixed_link_update(struct net_device *dev,
 /* slave device setup *******************************************************/
 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
 {
+	struct dsa_port *dp = dsa_slave_to_port(slave_dev);
 	struct dsa_slave_priv *p = netdev_priv(slave_dev);
-	struct dsa_switch *ds = p->dp->ds;
+	struct dsa_switch *ds = dp->ds;
 
 	slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
 	if (!slave_dev->phydev) {
@@ -997,14 +995,15 @@ static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
 
 static int dsa_slave_phy_setup(struct net_device *slave_dev)
 {
+	struct dsa_port *dp = dsa_slave_to_port(slave_dev);
 	struct dsa_slave_priv *p = netdev_priv(slave_dev);
-	struct dsa_switch *ds = p->dp->ds;
-	struct device_node *phy_dn, *port_dn;
+	struct device_node *port_dn = dp->dn;
+	struct dsa_switch *ds = dp->ds;
+	struct device_node *phy_dn;
 	bool phy_is_fixed = false;
 	u32 phy_flags = 0;
 	int mode, ret;
 
-	port_dn = p->dp->dn;
 	mode = of_get_phy_mode(port_dn);
 	if (mode < 0)
 		mode = PHY_INTERFACE_MODE_NA;
@@ -1025,7 +1024,7 @@ static int dsa_slave_phy_setup(struct net_device *slave_dev)
 	}
 
 	if (ds->ops->get_phy_flags)
-		phy_flags = ds->ops->get_phy_flags(ds, p->dp->index);
+		phy_flags = ds->ops->get_phy_flags(ds, dp->index);
 
 	if (phy_dn) {
 		int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
@@ -1061,10 +1060,10 @@ static int dsa_slave_phy_setup(struct net_device *slave_dev)
 	 * MDIO bus instead
 	 */
 	if (!slave_dev->phydev) {
-		ret = dsa_slave_phy_connect(slave_dev, p->dp->index);
+		ret = dsa_slave_phy_connect(slave_dev, dp->index);
 		if (ret) {
 			netdev_err(slave_dev, "failed to connect to port %d: %d\n",
-				   p->dp->index, ret);
+				   dp->index, ret);
 			if (phy_is_fixed)
 				of_phy_deregister_fixed_link(port_dn);
 			return ret;
@@ -1118,7 +1117,7 @@ static void dsa_slave_notify(struct net_device *dev, unsigned long val)
 {
 	struct dsa_slave_priv *p = netdev_priv(dev);
 	struct net_device *master = dsa_master_netdev(p);
-	struct dsa_port *dp = p->dp;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 	struct dsa_notifier_register_info rinfo = {
 		.switch_number = dp->ds->index,
 		.port_number = dp->index,
@@ -1202,8 +1201,8 @@ int dsa_slave_create(struct dsa_port *port, const char *name)
 
 out_phy:
 	phy_disconnect(slave_dev->phydev);
-	if (of_phy_is_fixed_link(p->dp->dn))
-		of_phy_deregister_fixed_link(p->dp->dn);
+	if (of_phy_is_fixed_link(port->dn))
+		of_phy_deregister_fixed_link(port->dn);
 out_free:
 	free_percpu(p->stats64);
 	free_netdev(slave_dev);
@@ -1213,10 +1212,9 @@ out_free:
 
 void dsa_slave_destroy(struct net_device *slave_dev)
 {
+	struct dsa_port *dp = dsa_slave_to_port(slave_dev);
 	struct dsa_slave_priv *p = netdev_priv(slave_dev);
-	struct device_node *port_dn;
-
-	port_dn = p->dp->dn;
+	struct device_node *port_dn = dp->dn;
 
 	netif_carrier_off(slave_dev);
 	if (slave_dev->phydev) {
@@ -1239,8 +1237,7 @@ static bool dsa_slave_dev_check(struct net_device *dev)
 static int dsa_slave_changeupper(struct net_device *dev,
 				 struct netdev_notifier_changeupper_info *info)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_port *dp = p->dp;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 	int err = NOTIFY_DONE;
 
 	if (netif_is_bridge_master(info->upper_dev)) {
@@ -1283,14 +1280,14 @@ static void dsa_slave_switchdev_event_work(struct work_struct *work)
 		container_of(work, struct dsa_switchdev_event_work, work);
 	struct net_device *dev = switchdev_work->dev;
 	struct switchdev_notifier_fdb_info *fdb_info;
-	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_port *dp = dsa_slave_to_port(dev);
 	int err;
 
 	rtnl_lock();
 	switch (switchdev_work->event) {
 	case SWITCHDEV_FDB_ADD_TO_DEVICE:
 		fdb_info = &switchdev_work->fdb_info;
-		err = dsa_port_fdb_add(p->dp, fdb_info->addr, fdb_info->vid);
+		err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
 		if (err) {
 			netdev_dbg(dev, "fdb add failed err=%d\n", err);
 			break;
@@ -1301,7 +1298,7 @@ static void dsa_slave_switchdev_event_work(struct work_struct *work)
 
 	case SWITCHDEV_FDB_DEL_TO_DEVICE:
 		fdb_info = &switchdev_work->fdb_info;
-		err = dsa_port_fdb_del(p->dp, fdb_info->addr, fdb_info->vid);
+		err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
 		if (err) {
 			netdev_dbg(dev, "fdb del failed err=%d\n", err);
 			dev_close(dev);