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From 831a3d26bea0d14f8563eecf96def660a74a3000 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Tue, 5 Oct 2021 21:47:02 +0200
Subject: [PATCH 08/11] net: dsa: rtl8366rb: Support disabling learning
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
The RTL8366RB hardware supports disabling learning per-port
so let's make use of this feature. Rename some unfortunately
named registers in the process.
Suggested-by: Vladimir Oltean <olteanv@gmail.com>
Cc: Alvin Šipraga <alsi@bang-olufsen.dk>
Cc: Mauri Sandberg <sandberg@mailfence.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: DENG Qingfang <dqfext@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/dsa/rtl8366rb.c | 50 ++++++++++++++++++++++++++++++++-----
1 file changed, 44 insertions(+), 6 deletions(-)
--- a/drivers/net/dsa/rtl8366rb.c
+++ b/drivers/net/dsa/rtl8366rb.c
@@ -14,6 +14,7 @@
#include <linux/bitops.h>
#include <linux/etherdevice.h>
+#include <linux/if_bridge.h>
#include <linux/interrupt.h>
#include <linux/irqdomain.h>
#include <linux/irqchip/chained_irq.h>
@@ -42,9 +43,12 @@
/* Port Enable Control register */
#define RTL8366RB_PECR 0x0001
-/* Switch Security Control registers */
-#define RTL8366RB_SSCR0 0x0002
-#define RTL8366RB_SSCR1 0x0003
+/* Switch per-port learning disablement register */
+#define RTL8366RB_PORT_LEARNDIS_CTRL 0x0002
+
+/* Security control, actually aging register */
+#define RTL8366RB_SECURITY_CTRL 0x0003
+
#define RTL8366RB_SSCR2 0x0004
#define RTL8366RB_SSCR2_DROP_UNKNOWN_DA BIT(0)
@@ -927,13 +931,14 @@ static int rtl8366rb_setup(struct dsa_sw
/* layer 2 size, see rtl8366rb_change_mtu() */
rb->max_mtu[i] = 1532;
- /* Enable learning for all ports */
- ret = regmap_write(smi->map, RTL8366RB_SSCR0, 0);
+ /* Disable learning for all ports */
+ ret = regmap_write(smi->map, RTL8366RB_PORT_LEARNDIS_CTRL,
+ RTL8366RB_PORT_ALL);
if (ret)
return ret;
/* Enable auto ageing for all ports */
- ret = regmap_write(smi->map, RTL8366RB_SSCR1, 0);
+ ret = regmap_write(smi->map, RTL8366RB_SECURITY_CTRL, 0);
if (ret)
return ret;
@@ -1272,6 +1277,37 @@ static int rtl8366rb_vlan_filtering(stru
return ret;
}
+static int
+rtl8366rb_port_pre_bridge_flags(struct dsa_switch *ds, int port,
+ struct switchdev_brport_flags flags,
+ struct netlink_ext_ack *extack)
+{
+ /* We support enabling/disabling learning */
+ if (flags.mask & ~(BR_LEARNING))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int
+rtl8366rb_port_bridge_flags(struct dsa_switch *ds, int port,
+ struct switchdev_brport_flags flags,
+ struct netlink_ext_ack *extack)
+{
+ struct realtek_smi *smi = ds->priv;
+ int ret;
+
+ if (flags.mask & BR_LEARNING) {
+ ret = regmap_update_bits(smi->map, RTL8366RB_PORT_LEARNDIS_CTRL,
+ BIT(port),
+ (flags.val & BR_LEARNING) ? 0 : BIT(port));
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
static int rtl8366rb_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
{
struct realtek_smi *smi = ds->priv;
@@ -1682,6 +1718,8 @@ static const struct dsa_switch_ops rtl83
.port_vlan_del = rtl8366_vlan_del,
.port_enable = rtl8366rb_port_enable,
.port_disable = rtl8366rb_port_disable,
+ .port_pre_bridge_flags = rtl8366rb_port_pre_bridge_flags,
+ .port_bridge_flags = rtl8366rb_port_bridge_flags,
.port_change_mtu = rtl8366rb_change_mtu,
.port_max_mtu = rtl8366rb_max_mtu,
};
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