kernel: ar83xx: add support to configure per port VLAN priority

Add support to allow for per switch port VLAN priority (PCP) bits
for the ar8327/8337 chip using the swconfig utility.

Tested on Netgear R7800

Signed-off-by: Tan Hong Hui <hhtan72@yahoo.com>

target/linux/generic/files/drivers/net/phy/ar8216.h

@@ -462,6 +462,7 @@ struct ar8xxx_priv {
 	bool mirror_tx;
 	int source_port;
 	int monitor_port;
+	u8 port_vlan_prio[AR8X16_MAX_PORTS];
 };
 
 u32

target/linux/generic/files/drivers/net/phy/ar8327.c

@@ -926,10 +926,19 @@ ar8327_setup_port(struct ar8xxx_priv *priv, int port, u32 members)
 
 	t = pvid << AR8327_PORT_VLAN0_DEF_SVID_S;
 	t |= pvid << AR8327_PORT_VLAN0_DEF_CVID_S;
+	if (priv->vlan && priv->port_vlan_prio[port] > 0) {
+		u32 prio = priv->port_vlan_prio[port];
+
+		t |= prio << AR8327_PORT_VLAN0_DEF_SPRI_S;
+		t |= prio << AR8327_PORT_VLAN0_DEF_CPRI_S;
+	}
 	ar8xxx_write(priv, AR8327_REG_PORT_VLAN0(port), t);
 
 	t = AR8327_PORT_VLAN1_PORT_VLAN_PROP;
 	t |= egress << AR8327_PORT_VLAN1_OUT_MODE_S;
+	if (priv->vlan && priv->port_vlan_prio[port] > 0)
+		t |= AR8327_PORT_VLAN1_VLAN_PRI_PROP;
+
 	ar8xxx_write(priv, AR8327_REG_PORT_VLAN1(port), t);
 
 	t = members;
@@ -1268,6 +1277,37 @@ ar8327_sw_set_igmp_v3(struct switch_dev *dev,
 	return 0;
 }
 
+static int
+ar8327_sw_set_port_vlan_prio(struct switch_dev *dev, const struct switch_attr *attr,
+			     struct switch_val *val)
+{
+	struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
+	int port = val->port_vlan;
+
+	if (port >= dev->ports)
+		return -EINVAL;
+	if (port == 0 || port == 6)
+		return -EOPNOTSUPP;
+	if (val->value.i < 0 || val->value.i > 7)
+		return -EINVAL;
+
+	priv->port_vlan_prio[port] = val->value.i;
+
+	return 0;
+}
+
+static int
+ar8327_sw_get_port_vlan_prio(struct switch_dev *dev, const struct switch_attr *attr,
+                  struct switch_val *val)
+{
+	struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
+	int port = val->port_vlan;
+
+	val->value.i = priv->port_vlan_prio[port];
+
+	return 0;
+}
+
 static const struct switch_attr ar8327_sw_attr_globals[] = {
 	{
 		.type = SWITCH_TYPE_INT,
@@ -1389,6 +1429,14 @@ static const struct switch_attr ar8327_sw_attr_port[] = {
 		.get = ar8327_sw_get_port_igmp_snooping,
 		.max = 1
 	},
+	{
+		.type = SWITCH_TYPE_INT,
+		.name = "vlan_prio",
+		.description = "Port VLAN default priority (VLAN PCP) (0-7)",
+		.set = ar8327_sw_set_port_vlan_prio,
+		.get = ar8327_sw_get_port_vlan_prio,
+		.max = 7,
+	},
 };
 
 static const struct switch_dev_ops ar8327_sw_ops = {

target/linux/generic/files/drivers/net/phy/ar8327.h

@@ -164,12 +164,18 @@
 #define   AR8327_FRAME_ACK_CTRL_S(_i)		(((_i) % 4) * 8)
 
 #define AR8327_REG_PORT_VLAN0(_i)		(0x420 + (_i) * 0x8)
+#define   AR8327_PORT_VLAN0_DEF_PRI_MASK	BITS(0, 3)
 #define   AR8327_PORT_VLAN0_DEF_SVID		BITS(0, 12)
 #define   AR8327_PORT_VLAN0_DEF_SVID_S		0
+#define   AR8327_PORT_VLAN0_DEF_SPRI		BITS(13, 3)
+#define   AR8327_PORT_VLAN0_DEF_SPRI_S		13
 #define   AR8327_PORT_VLAN0_DEF_CVID		BITS(16, 12)
 #define   AR8327_PORT_VLAN0_DEF_CVID_S		16
+#define   AR8327_PORT_VLAN0_DEF_CPRI		BITS(29, 3)
+#define   AR8327_PORT_VLAN0_DEF_CPRI_S		29
 
 #define AR8327_REG_PORT_VLAN1(_i)		(0x424 + (_i) * 0x8)
+#define   AR8327_PORT_VLAN1_VLAN_PRI_PROP	BIT(4)
 #define   AR8327_PORT_VLAN1_PORT_VLAN_PROP	BIT(6)
 #define   AR8327_PORT_VLAN1_OUT_MODE		BITS(12, 2)
 #define   AR8327_PORT_VLAN1_OUT_MODE_S		12