Date:   Wed, 11 May 2022 13:06:37 +0300
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     netdev@...r.kernel.org
Cc:     Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vladimir Oltean <olteanv@...il.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com,
        Colin Foster <colin.foster@...advantage.com>
Subject: [PATCH net-next 3/3] net: mscc: ocelot: move ocelot_port_private :: chip_port to ocelot_port :: index

Currently the ocelot switch lib is unaware of the index of a struct
ocelot_port, since that is kept in the encapsulating structures of outer
drivers (struct dsa_port :: index, struct ocelot_port_private :: chip_port).

With the upcoming increase in complexity associated with assigning DSA
tag_8021q CPU ports to certain user ports, it becomes necessary for the
switch lib to be able to retrieve the index of a certain ocelot_port.

Therefore, introduce a new u8 to ocelot_port (same size as the chip_port
used by the ocelot switchdev driver) and rework the existing code to
populate and use it.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 drivers/net/dsa/ocelot/felix.c         |  1 +
 drivers/net/ethernet/mscc/ocelot.h     |  1 -
 drivers/net/ethernet/mscc/ocelot_net.c | 76 +++++++++++++-------------
 include/soc/mscc/ocelot.h              |  2 +
 4 files changed, 41 insertions(+), 39 deletions(-)

diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index beac90bc642c..d38258a39d07 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -1249,6 +1249,7 @@ static int felix_init_structs(struct felix *felix, int num_phys_ports)
 		ocelot_port->phy_mode = port_phy_modes[port];
 		ocelot_port->ocelot = ocelot;
 		ocelot_port->target = target;
+		ocelot_port->index = port;
 		ocelot->ports[port] = ocelot_port;
 	}
 
diff --git a/drivers/net/ethernet/mscc/ocelot.h b/drivers/net/ethernet/mscc/ocelot.h
index d0fa8ab6cc81..6d65cc87d757 100644
--- a/drivers/net/ethernet/mscc/ocelot.h
+++ b/drivers/net/ethernet/mscc/ocelot.h
@@ -48,7 +48,6 @@ struct ocelot_port_private {
 	struct net_device *dev;
 	struct phylink *phylink;
 	struct phylink_config phylink_config;
-	u8 chip_port;
 	struct ocelot_port_tc tc;
 };
 
diff --git a/drivers/net/ethernet/mscc/ocelot_net.c b/drivers/net/ethernet/mscc/ocelot_net.c
index 616d8127ef51..be168a372498 100644
--- a/drivers/net/ethernet/mscc/ocelot_net.c
+++ b/drivers/net/ethernet/mscc/ocelot_net.c
@@ -191,7 +191,7 @@ static struct devlink_port *ocelot_get_devlink_port(struct net_device *dev)
 {
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	return &ocelot->devlink_ports[port];
 }
@@ -201,7 +201,7 @@ int ocelot_setup_tc_cls_flower(struct ocelot_port_private *priv,
 			       bool ingress)
 {
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	if (!ingress)
 		return -EOPNOTSUPP;
@@ -226,7 +226,7 @@ static int ocelot_setup_tc_cls_matchall_police(struct ocelot_port_private *priv,
 	struct flow_action_entry *action = &f->rule->action.entries[0];
 	struct ocelot *ocelot = priv->port.ocelot;
 	struct ocelot_policer pol = { 0 };
-	int port = priv->chip_port;
+	int port = priv->port.index;
 	int err;
 
 	if (!ingress) {
@@ -288,8 +288,8 @@ static int ocelot_setup_tc_cls_matchall_mirred(struct ocelot_port_private *priv,
 
 	other_priv = netdev_priv(a->dev);
 
-	err = ocelot_port_mirror_add(ocelot, priv->chip_port,
-				     other_priv->chip_port, ingress, extack);
+	err = ocelot_port_mirror_add(ocelot, priv->port.index,
+				     other_priv->port.index, ingress, extack);
 	if (err)
 		return err;
 
@@ -306,7 +306,7 @@ static int ocelot_del_tc_cls_matchall_police(struct ocelot_port_private *priv,
 					     struct netlink_ext_ack *extack)
 {
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 	int err;
 
 	err = ocelot_port_policer_del(ocelot, port);
@@ -327,7 +327,7 @@ static int ocelot_del_tc_cls_matchall_mirred(struct ocelot_port_private *priv,
 					     struct netlink_ext_ack *extack)
 {
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	ocelot_port_mirror_del(ocelot, port, ingress);
 
@@ -497,7 +497,7 @@ static int ocelot_vlan_vid_add(struct net_device *dev, u16 vid, bool pvid,
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 	int ret;
 
 	ret = ocelot_vlan_add(ocelot, port, vid, pvid, untagged);
@@ -515,7 +515,7 @@ static int ocelot_vlan_vid_del(struct net_device *dev, u16 vid)
 {
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 	int ret;
 
 	/* 8021q removes VID 0 on module unload for all interfaces
@@ -558,7 +558,7 @@ static netdev_tx_t ocelot_port_xmit(struct sk_buff *skb, struct net_device *dev)
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 	u32 rew_op = 0;
 
 	if (!static_branch_unlikely(&ocelot_fdma_enabled) &&
@@ -724,7 +724,7 @@ static void ocelot_get_stats64(struct net_device *dev,
 {
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	/* Configure the port to read the stats from */
 	ocelot_write(ocelot, SYS_STAT_CFG_STAT_VIEW(port),
@@ -767,7 +767,7 @@ static int ocelot_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	return ocelot_fdb_add(ocelot, port, addr, vid, ocelot_port->bridge);
 }
@@ -780,7 +780,7 @@ static int ocelot_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	return ocelot_fdb_del(ocelot, port, addr, vid, ocelot_port->bridge);
 }
@@ -798,7 +798,7 @@ static int ocelot_port_fdb_dump(struct sk_buff *skb,
 		.cb = cb,
 		.idx = *idx,
 	};
-	int port = priv->chip_port;
+	int port = priv->port.index;
 	int ret;
 
 	ret = ocelot_fdb_dump(ocelot, port, ocelot_port_fdb_do_dump, &dump);
@@ -840,7 +840,7 @@ static int ocelot_set_features(struct net_device *dev,
 	netdev_features_t changed = dev->features ^ features;
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC) &&
 	    priv->tc.offload_cnt) {
@@ -859,7 +859,7 @@ static int ocelot_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 {
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	/* If the attached PHY device isn't capable of timestamping operations,
 	 * use our own (when possible).
@@ -882,7 +882,7 @@ static int ocelot_change_mtu(struct net_device *dev, int new_mtu)
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
 
-	ocelot_port_set_maxlen(ocelot, priv->chip_port, new_mtu);
+	ocelot_port_set_maxlen(ocelot, priv->port.index, new_mtu);
 	WRITE_ONCE(dev->mtu, new_mtu);
 
 	return 0;
@@ -935,7 +935,7 @@ int ocelot_netdev_to_port(struct net_device *dev)
 
 	priv = netdev_priv(dev);
 
-	return priv->chip_port;
+	return priv->port.index;
 }
 
 static void ocelot_port_get_strings(struct net_device *netdev, u32 sset,
@@ -943,7 +943,7 @@ static void ocelot_port_get_strings(struct net_device *netdev, u32 sset,
 {
 	struct ocelot_port_private *priv = netdev_priv(netdev);
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	ocelot_get_strings(ocelot, port, sset, data);
 }
@@ -954,7 +954,7 @@ static void ocelot_port_get_ethtool_stats(struct net_device *dev,
 {
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	ocelot_get_ethtool_stats(ocelot, port, data);
 }
@@ -963,7 +963,7 @@ static int ocelot_port_get_sset_count(struct net_device *dev, int sset)
 {
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	return ocelot_get_sset_count(ocelot, port, sset);
 }
@@ -973,7 +973,7 @@ static int ocelot_port_get_ts_info(struct net_device *dev,
 {
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	if (!ocelot->ptp)
 		return ethtool_op_get_ts_info(dev, info);
@@ -1025,7 +1025,7 @@ static int ocelot_port_attr_set(struct net_device *dev, const void *ctx,
 {
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 	int err = 0;
 
 	if (ctx && ctx != priv)
@@ -1066,7 +1066,7 @@ static int ocelot_vlan_vid_prepare(struct net_device *dev, u16 vid, bool pvid,
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	return ocelot_vlan_prepare(ocelot, port, vid, pvid, untagged, extack);
 }
@@ -1092,7 +1092,7 @@ static int ocelot_port_obj_add_mdb(struct net_device *dev,
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	return ocelot_port_mdb_add(ocelot, port, mdb, ocelot_port->bridge);
 }
@@ -1103,7 +1103,7 @@ static int ocelot_port_obj_del_mdb(struct net_device *dev,
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	return ocelot_port_mdb_del(ocelot, port, mdb, ocelot_port->bridge);
 }
@@ -1114,7 +1114,7 @@ static int ocelot_port_obj_mrp_add(struct net_device *dev,
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	return ocelot_mrp_add(ocelot, port, mrp);
 }
@@ -1125,7 +1125,7 @@ static int ocelot_port_obj_mrp_del(struct net_device *dev,
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	return ocelot_mrp_del(ocelot, port, mrp);
 }
@@ -1137,7 +1137,7 @@ ocelot_port_obj_mrp_add_ring_role(struct net_device *dev,
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	return ocelot_mrp_add_ring_role(ocelot, port, mrp);
 }
@@ -1149,7 +1149,7 @@ ocelot_port_obj_mrp_del_ring_role(struct net_device *dev,
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	return ocelot_mrp_del_ring_role(ocelot, port, mrp);
 }
@@ -1314,7 +1314,7 @@ static int ocelot_netdevice_bridge_join(struct net_device *dev,
 	struct ocelot_port_private *priv = netdev_priv(dev);
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 	int bridge_num, err;
 
 	bridge_num = ocelot_bridge_num_get(ocelot, bridge);
@@ -1366,7 +1366,7 @@ static int ocelot_netdevice_bridge_leave(struct net_device *dev,
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
 	int bridge_num = ocelot_port->bridge_num;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 	int err;
 
 	err = ocelot_switchdev_unsync(ocelot, port);
@@ -1388,7 +1388,7 @@ static int ocelot_netdevice_lag_join(struct net_device *dev,
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
 	struct net_device *bridge_dev;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 	int err;
 
 	err = ocelot_port_lag_join(ocelot, port, bond, info);
@@ -1431,7 +1431,7 @@ static int ocelot_netdevice_lag_leave(struct net_device *dev,
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
 	struct net_device *bridge_dev;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	ocelot_port_lag_leave(ocelot, port, bond);
 
@@ -1545,7 +1545,7 @@ ocelot_netdevice_changelowerstate(struct net_device *dev,
 	bool is_active = info->link_up && info->tx_enabled;
 	struct ocelot_port *ocelot_port = &priv->port;
 	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	if (!ocelot_port->bond)
 		return NOTIFY_DONE;
@@ -1693,7 +1693,7 @@ static void vsc7514_phylink_mac_link_down(struct phylink_config *config,
 	struct net_device *ndev = to_net_dev(config->dev);
 	struct ocelot_port_private *priv = netdev_priv(ndev);
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	ocelot_phylink_mac_link_down(ocelot, port, link_an_mode, interface,
 				     OCELOT_MAC_QUIRKS);
@@ -1709,7 +1709,7 @@ static void vsc7514_phylink_mac_link_up(struct phylink_config *config,
 	struct net_device *ndev = to_net_dev(config->dev);
 	struct ocelot_port_private *priv = netdev_priv(ndev);
 	struct ocelot *ocelot = priv->port.ocelot;
-	int port = priv->chip_port;
+	int port = priv->port.index;
 
 	ocelot_phylink_mac_link_up(ocelot, port, phydev, link_an_mode,
 				   interface, speed, duplex,
@@ -1823,9 +1823,9 @@ int ocelot_probe_port(struct ocelot *ocelot, int port, struct regmap *target,
 	SET_NETDEV_DEV(dev, ocelot->dev);
 	priv = netdev_priv(dev);
 	priv->dev = dev;
-	priv->chip_port = port;
 	ocelot_port = &priv->port;
 	ocelot_port->ocelot = ocelot;
+	ocelot_port->index = port;
 	ocelot_port->target = target;
 	ocelot->ports[port] = ocelot_port;
 
diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h
index 904c15ca145e..3b8c5a54fb00 100644
--- a/include/soc/mscc/ocelot.h
+++ b/include/soc/mscc/ocelot.h
@@ -675,6 +675,8 @@ struct ocelot_port {
 	u8				ptp_cmd;
 	u8				ts_id;
 
+	u8				index;
+
 	u8				stp_state;
 	bool				vlan_aware;
 	bool				is_dsa_8021q_cpu;
-- 
2.25.1

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