linux-kernel - [PATCH net-next] net: dsa: rtl8366rb: support bridge offloading

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Message-Id: <20210315170144.2081099-1-dqfext@gmail.com>
Date:   Tue, 16 Mar 2021 01:01:44 +0800
From:   LGA1150 <dqfext@...il.com>
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>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     DENG Qingfang <dqfext@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH net-next] net: dsa: rtl8366rb: support bridge offloading

From: DENG Qingfang <dqfext@...il.com>

Use port isolation registers to configure bridge offloading.
Remove the VLAN init, as we have proper CPU tag and bridge offloading
support now.

Signed-off-by: DENG Qingfang <dqfext@...il.com>
---
Changes since RFC:
  Fix build error

 drivers/net/dsa/rtl8366rb.c | 71 +++++++++++++++++++++++++++++++++----
 1 file changed, 65 insertions(+), 6 deletions(-)

diff --git a/drivers/net/dsa/rtl8366rb.c b/drivers/net/dsa/rtl8366rb.c
index a89093bc6c6a..bbcfdd84f0e9 100644
--- a/drivers/net/dsa/rtl8366rb.c
+++ b/drivers/net/dsa/rtl8366rb.c
@@ -300,6 +300,12 @@
 #define RTL8366RB_INTERRUPT_STATUS_REG	0x0442
 #define RTL8366RB_NUM_INTERRUPT		14 /* 0..13 */
 
+/* Port isolation registers */
+#define RTL8366RB_PORT_ISO_BASE		0x0F08
+#define RTL8366RB_PORT_ISO(pnum)	(RTL8366RB_PORT_ISO_BASE + (pnum))
+#define RTL8366RB_PORT_ISO_EN		BIT(0)
+#define RTL8366RB_PORT_ISO_PORTS_MASK	GENMASK(7, 1)
+
 /* bits 0..5 enable force when cleared */
 #define RTL8366RB_MAC_FORCE_CTRL_REG	0x0F11
 
@@ -835,6 +841,15 @@ static int rtl8366rb_setup(struct dsa_switch *ds)
 	if (ret)
 		return ret;
 
+	/* Isolate user ports */
+	for (i = 0; i < RTL8366RB_PORT_NUM_CPU; i++) {
+		ret = regmap_write(smi->map, RTL8366RB_PORT_ISO(i),
+				   RTL8366RB_PORT_ISO_EN |
+				   BIT(RTL8366RB_PORT_NUM_CPU + 1));
+		if (ret)
+			return ret;
+	}
+
 	/* Set up the "green ethernet" feature */
 	ret = rtl8366rb_jam_table(rtl8366rb_green_jam,
 				  ARRAY_SIZE(rtl8366rb_green_jam), smi, false);
@@ -963,10 +978,6 @@ static int rtl8366rb_setup(struct dsa_switch *ds)
 			return ret;
 	}
 
-	ret = rtl8366_init_vlan(smi);
-	if (ret)
-		return ret;
-
 	ret = rtl8366rb_setup_cascaded_irq(smi);
 	if (ret)
 		dev_info(smi->dev, "no interrupt support\n");
@@ -977,8 +988,6 @@ static int rtl8366rb_setup(struct dsa_switch *ds)
 		return -ENODEV;
 	}
 
-	ds->configure_vlan_while_not_filtering = false;
-
 	return 0;
 }
 
@@ -1127,6 +1136,54 @@ rtl8366rb_port_disable(struct dsa_switch *ds, int port)
 	rb8366rb_set_port_led(smi, port, false);
 }
 
+static int
+rtl8366rb_port_bridge_join(struct dsa_switch *ds, int port,
+			   struct net_device *bridge)
+{
+	struct realtek_smi *smi = ds->priv;
+	unsigned int port_bitmap = 0;
+	int ret, i;
+
+	for (i = 0; i < RTL8366RB_PORT_NUM_CPU; i++) {
+		if (i == port)
+			continue;
+		if (dsa_to_port(ds, i)->bridge_dev != bridge)
+			continue;
+		ret = regmap_update_bits(smi->map, RTL8366RB_PORT_ISO(i),
+					 0, BIT(port + 1));
+		if (ret)
+			return ret;
+
+		port_bitmap |= BIT(i);
+	}
+
+	return regmap_update_bits(smi->map, RTL8366RB_PORT_ISO(port),
+				  0, port_bitmap << 1);
+}
+
+static void
+rtl8366rb_port_bridge_leave(struct dsa_switch *ds, int port,
+			    struct net_device *bridge)
+{
+	struct realtek_smi *smi = ds->priv;
+	unsigned int port_bitmap = 0;
+	int i;
+
+	for (i = 0; i < RTL8366RB_PORT_NUM_CPU; i++) {
+		if (i == port)
+			continue;
+		if (dsa_to_port(ds, i)->bridge_dev != bridge)
+			continue;
+		regmap_update_bits(smi->map, RTL8366RB_PORT_ISO(i),
+				   BIT(port + 1), 0);
+
+		port_bitmap |= BIT(i);
+	}
+
+	regmap_update_bits(smi->map, RTL8366RB_PORT_ISO(port),
+			   port_bitmap << 1, 0);
+}
+
 static int rtl8366rb_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
 {
 	struct realtek_smi *smi = ds->priv;
@@ -1510,6 +1567,8 @@ static const struct dsa_switch_ops rtl8366rb_switch_ops = {
 	.get_strings = rtl8366_get_strings,
 	.get_ethtool_stats = rtl8366_get_ethtool_stats,
 	.get_sset_count = rtl8366_get_sset_count,
+	.port_bridge_join = rtl8366rb_port_bridge_join,
+	.port_bridge_leave = rtl8366rb_port_bridge_leave,
 	.port_vlan_filtering = rtl8366_vlan_filtering,
 	.port_vlan_add = rtl8366_vlan_add,
 	.port_vlan_del = rtl8366_vlan_del,
-- 
2.25.1