linux-kernel - [PATCH net v2 2/7] net: hibmcge: fix incorrect multicast filtering issue

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Message-ID: <20250403135311.545633-3-shaojijie@huawei.com>
Date: Thu, 3 Apr 2025 21:53:06 +0800
From: Jijie Shao <shaojijie@...wei.com>
To: <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
	<pabeni@...hat.com>, <andrew+netdev@...n.ch>, <horms@...nel.org>
CC: <shenjian15@...wei.com>, <wangpeiyang1@...wei.com>,
	<liuyonglong@...wei.com>, <chenhao418@...wei.com>,
	<jonathan.cameron@...wei.com>, <shameerali.kolothum.thodi@...wei.com>,
	<salil.mehta@...wei.com>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <shaojijie@...wei.com>
Subject: [PATCH net v2 2/7] net: hibmcge: fix incorrect multicast filtering issue

The driver does not support multicast filtering,
the mask must be set to 0xFFFFFFFF. Otherwise,
incorrect filtering occurs.

This patch fixes this problem.

Fixes: 37b367d60d0f ("net: hibmcge: Add unicast frame filter supported in this module")
Signed-off-by: Jijie Shao <shaojijie@...wei.com>
Reviewed-by: Simon Horman <horms@...nel.org>
---
 drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c  | 4 ++++
 drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
index 7d3bbd3e2adc..9b65eef62b3f 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
@@ -234,6 +234,10 @@ void hbg_hw_set_mac_filter_enable(struct hbg_priv *priv, u32 enable)
 {
 	hbg_reg_write_field(priv, HBG_REG_REC_FILT_CTRL_ADDR,
 			    HBG_REG_REC_FILT_CTRL_UC_MATCH_EN_B, enable);
+
+	/* only uc filter is supported, so set all bits of mc mask reg to 1 */
+	hbg_reg_write64(priv, HBG_REG_STATION_ADDR_LOW_MSK_0, U64_MAX);
+	hbg_reg_write64(priv, HBG_REG_STATION_ADDR_LOW_MSK_1, U64_MAX);
 }
 
 void hbg_hw_set_pause_enable(struct hbg_priv *priv, u32 tx_en, u32 rx_en)
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
index fd623cfd13de..a6e7f5e62b48 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
@@ -135,6 +135,8 @@
 #define HBG_REG_STATION_ADDR_HIGH_4_ADDR	(HBG_REG_SGMII_BASE + 0x0224)
 #define HBG_REG_STATION_ADDR_LOW_5_ADDR		(HBG_REG_SGMII_BASE + 0x0228)
 #define HBG_REG_STATION_ADDR_HIGH_5_ADDR	(HBG_REG_SGMII_BASE + 0x022C)
+#define HBG_REG_STATION_ADDR_LOW_MSK_0		(HBG_REG_SGMII_BASE + 0x0230)
+#define HBG_REG_STATION_ADDR_LOW_MSK_1		(HBG_REG_SGMII_BASE + 0x0238)
 
 /* PCU */
 #define HBG_REG_TX_FIFO_THRSLD_ADDR		(HBG_REG_SGMII_BASE + 0x0420)
-- 
2.33.0