linux-kernel - [PATCH v2 2/4] net: renesas: rswitch: configure default ageing time

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Message-Id: <20250708-add_l2_switching-v2-2-f91f5556617a@renesas.com>
Date: Tue, 08 Jul 2025 11:27:38 +0200
From: Michael Dege <michael.dege@...esas.com>
To: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>, 
 Niklas Söderlund <niklas.soderlund@...natech.se>, 
 Paul Barker <paul@...rker.dev>, Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, linux-renesas-soc@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Michael Dege <michael.dege@...esas.com>, 
 Nikita Yushchenko <nikita.yoush@...entembedded.com>
Subject: [PATCH v2 2/4] net: renesas: rswitch: configure default ageing
 time

Enable MAC ageing by setting up the timer and setting the ageging
time to the default of 300s.

Signed-off-by: Michael Dege <michael.dege@...esas.com>
---
 drivers/net/ethernet/renesas/rswitch.h      | 13 ++++++++++++-
 drivers/net/ethernet/renesas/rswitch_main.c | 11 ++++++++++-
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
index 532192cbca4b520e06a7e35653929d8364f1ccb2..feb62b99bceb50e1d68345ff9eba581f7c38edbe 100644
--- a/drivers/net/ethernet/renesas/rswitch.h
+++ b/drivers/net/ethernet/renesas/rswitch.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /* Renesas Ethernet Switch device driver
  *
- * Copyright (C) 2022 Renesas Electronics Corporation
+ * Copyright (C) 2022-2025 Renesas Electronics Corporation
  */
 
 #ifndef __RSWITCH_H__
@@ -826,6 +826,17 @@ enum rswitch_gwca_mode {
 
 #define FWPBFCSDC(j, i)         (FWPBFCSDC00 + (i) * 0x10 + (j) * 0x04)
 
+#define FWMACAGUSPC_MACAGUSP	GENMASK(9, 0)
+#define FWMACAGC_MACAGT		GENMASK(15, 0)
+#define FWMACAGC_MACAGE		BIT(16)
+#define FWMACAGC_MACAGSL	BIT(17)
+#define FWMACAGC_MACAGPM	BIT(18)
+#define FWMACAGC_MACDES		BIT(24)
+#define FWMACAGC_MACAGOG	BIT(28)
+#define FWMACAGC_MACDESOG	BIT(29)
+
+#define RSW_AGEING_TIME		300
+
 /* TOP */
 #define TPEMIMC7(queue)		(TPEMIMC70 + (queue) * 4)
 
diff --git a/drivers/net/ethernet/renesas/rswitch_main.c b/drivers/net/ethernet/renesas/rswitch_main.c
index aba772e14555d30891dc74a5a123121dad77e92b..2474271cac7f057fffb472131f5a7a72a0fa9a87 100644
--- a/drivers/net/ethernet/renesas/rswitch_main.c
+++ b/drivers/net/ethernet/renesas/rswitch_main.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Renesas Ethernet Switch device driver
  *
- * Copyright (C) 2022 Renesas Electronics Corporation
+ * Copyright (C) 2022-2025 Renesas Electronics Corporation
  */
 
 #include <linux/clk.h>
@@ -113,6 +113,7 @@ static void rswitch_fwd_init(struct rswitch_private *priv)
 {
 	u32 all_ports_mask = GENMASK(RSWITCH_NUM_AGENTS - 1, 0);
 	unsigned int i;
+	u32 reg_val;
 
 	/* Start with empty configuration */
 	for (i = 0; i < RSWITCH_NUM_AGENTS; i++) {
@@ -128,6 +129,14 @@ static void rswitch_fwd_init(struct rswitch_private *priv)
 		iowrite32(0, priv->addr + FWPBFC(i));
 	}
 
+	/* Configure MAC table aging */
+	rswitch_modify(priv->addr, FWMACAGUSPC, FWMACAGUSPC_MACAGUSP,
+		       FIELD_PREP(FWMACAGUSPC_MACAGUSP, 0x140));
+
+	reg_val = FIELD_PREP(FWMACAGC_MACAGT, RSW_AGEING_TIME);
+	reg_val |= FWMACAGC_MACAGE | FWMACAGC_MACAGSL;
+	iowrite32(reg_val, priv->addr + FWMACAGC);
+
 	/* For enabled ETHA ports, setup port based forwarding */
 	rswitch_for_each_enabled_port(priv, i) {
 		/* Port based forwarding from port i to GWCA port */

-- 
2.49.0