netdev - [net-next PATCH 3/5 v3] net: dsa: rtl8366: Split out default VLAN config

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Date:   Mon,  6 Jul 2020 01:15:48 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev@...r.kernel.org, "David S . Miller" <davem@...emloft.net>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        DENG Qingfang <dqfext@...il.com>,
        Mauri Sandberg <sandberg@...lfence.com>
Subject: [net-next PATCH 3/5 v3] net: dsa: rtl8366: Split out default VLAN config

We loop over the ports to initialize the default VLAN
and PVID for each port. As we need to reuse the
code to reinitialize a single port, break out the
function rtl8366_set_default_vlan_and_pvid().

Cc: DENG Qingfang <dqfext@...il.com>
Cc: Mauri Sandberg <sandberg@...lfence.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
ChangeLog v2->v3:
- Rebased on Andrew's patch for the (int) compile warning
  on GENMASK(). change is carried over.
- Collect Andrew's review tag.
ChangeLog v1->v2:
- Rebased on v5.8-rc1 and other changes.
---
 drivers/net/dsa/rtl8366.c | 70 ++++++++++++++++++++++++---------------
 1 file changed, 43 insertions(+), 27 deletions(-)

diff --git a/drivers/net/dsa/rtl8366.c b/drivers/net/dsa/rtl8366.c
index 993cf3ac59d9..b907c0ed9697 100644
--- a/drivers/net/dsa/rtl8366.c
+++ b/drivers/net/dsa/rtl8366.c
@@ -253,6 +253,48 @@ int rtl8366_reset_vlan(struct realtek_smi *smi)
 }
 EXPORT_SYMBOL_GPL(rtl8366_reset_vlan);
 
+static int rtl8366_set_default_vlan_and_pvid(struct realtek_smi *smi,
+					     int port)
+{
+	u32 mask;
+	u16 vid;
+	int ret;
+
+	/* This is the reserved default VLAN for this port */
+	vid = port + 1;
+
+	if (port == smi->cpu_port)
+		/* For the CPU port, make all ports members of this
+		 * VLAN.
+		 */
+		mask = GENMASK((int)smi->num_ports - 1, 0);
+	else
+		/* For all other ports, enable itself plus the
+		 * CPU port.
+		 */
+		mask = BIT(port) | BIT(smi->cpu_port);
+
+	/* For each port, set the port as member of VLAN (port+1)
+	 * and untagged, except for the CPU port: the CPU port (5) is
+	 * member of VLAN 6 and so are ALL the other ports as well.
+	 * Use filter 0 (no filter).
+	 */
+	dev_info(smi->dev, "Set VLAN %04x portmask to %08x (port %d %s)\n",
+		 vid, mask, port, (port == smi->cpu_port) ?
+		 "CPU PORT and all other ports" : "and CPU port");
+	ret = rtl8366_set_vlan(smi, vid, mask, mask, 0);
+	if (ret)
+		return ret;
+
+	dev_info(smi->dev, "Set PVID %04x on port %d\n",
+		 vid, port);
+	ret = rtl8366_set_pvid(smi, port, vid);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
 int rtl8366_init_vlan(struct realtek_smi *smi)
 {
 	int port;
@@ -266,33 +308,7 @@ int rtl8366_init_vlan(struct realtek_smi *smi)
 	 * it with the VLAN (port+1)
 	 */
 	for (port = 0; port < smi->num_ports; port++) {
-		u32 mask;
-
-		if (port == smi->cpu_port)
-			/* For the CPU port, make all ports members of this
-			 * VLAN.
-			 */
-			mask = GENMASK((int)smi->num_ports - 1, 0);
-		else
-			/* For all other ports, enable itself plus the
-			 * CPU port.
-			 */
-			mask = BIT(port) | BIT(smi->cpu_port);
-
-		/* For each port, set the port as member of VLAN (port+1)
-		 * and untagged, except for the CPU port: the CPU port (5) is
-		 * member of VLAN 6 and so are ALL the other ports as well.
-		 * Use filter 0 (no filter).
-		 */
-		dev_info(smi->dev, "VLAN%d port mask for port %d, %08x\n",
-			 (port + 1), port, mask);
-		ret = rtl8366_set_vlan(smi, (port + 1), mask, mask, 0);
-		if (ret)
-			return ret;
-
-		dev_info(smi->dev, "VLAN%d port %d, PVID set to %d\n",
-			 (port + 1), port, (port + 1));
-		ret = rtl8366_set_pvid(smi, port, (port + 1));
+		ret = rtl8366_set_default_vlan_and_pvid(smi, port);
 		if (ret)
 			return ret;
 	}
-- 
2.26.2