netdev - [PATCH net-next v3 5/6] net: dsa: qca: ar9331: add bridge support

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Date:   Mon,  2 Aug 2021 15:10:36 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Russell King <linux@...linux.org.uk>
Cc:     Oleksij Rempel <o.rempel@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mips@...r.kernel.org
Subject: [PATCH net-next v3 5/6] net: dsa: qca: ar9331: add bridge support

This switch is providing forwarding matrix, with it we can configure
individual bridges. Potentially we can configure more than one not VLAN
based bridge on this HW.

Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/net/dsa/qca/ar9331.c | 53 ++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/drivers/net/dsa/qca/ar9331.c b/drivers/net/dsa/qca/ar9331.c
index d726d2f223ea..a0324fed2136 100644
--- a/drivers/net/dsa/qca/ar9331.c
+++ b/drivers/net/dsa/qca/ar9331.c
@@ -40,6 +40,7 @@
  */
 
 #include <linux/bitfield.h>
+#include <linux/if_bridge.h>
 #include <linux/module.h>
 #include <linux/of_irq.h>
 #include <linux/of_mdio.h>
@@ -1093,6 +1094,56 @@ static int ar9331_sw_set_ageing_time(struct dsa_switch *ds,
 				  val);
 }
 
+static int ar9331_sw_port_bridge_mod(struct dsa_switch *ds, int port,
+				     struct net_device *br, bool join)
+{
+	struct ar9331_sw_priv *priv = (struct ar9331_sw_priv *)ds->priv;
+	struct regmap *regmap = priv->regmap;
+	int port_mask = BIT(dsa_to_port(ds, port)->cpu_dp->index);
+	int i, ret;
+	u32 val;
+
+	for (i = 0; i < ds->num_ports; i++) {
+		if (dsa_to_port(ds, i)->bridge_dev != br)
+			continue;
+
+		if (!dsa_is_user_port(ds, port))
+			continue;
+
+		val = FIELD_PREP(AR9331_SW_PORT_VLAN_PORT_VID_MEMBER, BIT(port));
+		ret = regmap_set_bits(regmap, AR9331_SW_REG_PORT_VLAN(i), val);
+		if (ret)
+			goto error;
+
+		if (join && i != port)
+			port_mask |= BIT(i);
+	}
+
+	val = FIELD_PREP(AR9331_SW_PORT_VLAN_PORT_VID_MEMBER, port_mask);
+	ret = regmap_update_bits(regmap, AR9331_SW_REG_PORT_VLAN(port),
+				 AR9331_SW_PORT_VLAN_PORT_VID_MEMBER, val);
+	if (ret)
+		goto error;
+
+	return 0;
+error:
+	dev_err(priv->dev, "%s: error: %i\n", __func__, ret);
+
+	return ret;
+}
+
+static int ar9331_sw_port_bridge_join(struct dsa_switch *ds, int port,
+				      struct net_device *br)
+{
+	return ar9331_sw_port_bridge_mod(ds, port, br, true);
+}
+
+static void ar9331_sw_port_bridge_leave(struct dsa_switch *ds, int port,
+					struct net_device *br)
+{
+	ar9331_sw_port_bridge_mod(ds, port, br, false);
+}
+
 static const struct dsa_switch_ops ar9331_sw_ops = {
 	.get_tag_protocol	= ar9331_sw_get_tag_protocol,
 	.setup			= ar9331_sw_setup,
@@ -1109,6 +1160,8 @@ static const struct dsa_switch_ops ar9331_sw_ops = {
 	.port_mdb_add           = ar9331_sw_port_mdb_add,
 	.port_mdb_del           = ar9331_sw_port_mdb_del,
 	.set_ageing_time	= ar9331_sw_set_ageing_time,
+	.port_bridge_join	= ar9331_sw_port_bridge_join,
+	.port_bridge_leave	= ar9331_sw_port_bridge_leave,
 };
 
 static irqreturn_t ar9331_sw_irq(int irq, void *data)
-- 
2.30.2