netdev - [PATCH net-next v8 10/11] net: stmmac: dwmac-loongson: Disable flow control for GMAC

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Message-Id: <101bfd570686485c59a325f65c5d0328c6cd91dd.1706601050.git.siyanteng@loongson.cn>
Date: Tue, 30 Jan 2024 16:49:15 +0800
From: Yanteng Si <siyanteng@...ngson.cn>
To: andrew@...n.ch,
	hkallweit1@...il.com,
	peppe.cavallaro@...com,
	alexandre.torgue@...s.st.com,
	joabreu@...opsys.com,
	fancer.lancer@...il.com
Cc: Yanteng Si <siyanteng@...ngson.cn>,
	Jose.Abreu@...opsys.com,
	chenhuacai@...ngson.cn,
	linux@...linux.org.uk,
	guyinggang@...ngson.cn,
	netdev@...r.kernel.org,
	chris.chenfeiyang@...il.com
Subject: [PATCH net-next v8 10/11] net: stmmac: dwmac-loongson: Disable flow control for GMAC

Loongson GMAC does not support Flow Control feature. Set flags to
disable it.

Signed-off-by: Yanteng Si <siyanteng@...ngson.cn>
Signed-off-by: Feiyang Chen <chenfeiyang@...ngson.cn>
Signed-off-by: Yinggang Gu <guyinggang@...ngson.cn>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c | 1 +
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c    | 6 +++---
 include/linux/stmmac.h                               | 1 +
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
index 1753a3c46b77..b78a73ea748b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
@@ -335,6 +335,7 @@ static int loongson_gmac_config(struct pci_dev *pdev,
 				struct stmmac_resources *res,
 				struct device_node *np)
 {
+	plat->flags |= STMMAC_FLAG_DISABLE_FLOW_CONTROL;
 
 	return 0;
 }
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 3aa862269eb0..8d676cbfba1e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1237,9 +1237,9 @@ static int stmmac_phy_setup(struct stmmac_priv *priv)
 		xpcs_get_interfaces(priv->hw->xpcs,
 				    priv->phylink_config.supported_interfaces);
 
-	priv->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
-						MAC_10FD | MAC_100FD |
-						MAC_1000FD;
+	priv->phylink_config.mac_capabilities = MAC_10FD | MAC_100FD | MAC_1000FD;
+	if (!(priv->plat->flags & STMMAC_FLAG_DISABLE_FLOW_CONTROL))
+		priv->phylink_config.mac_capabilities |= MAC_ASYM_PAUSE | MAC_SYM_PAUSE;
 
 	stmmac_set_half_duplex(priv);
 
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index 197f6f914104..832cd8cd688f 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -223,6 +223,7 @@ struct dwmac4_addrs {
 #define STMMAC_FLAG_HWTSTAMP_CORRECT_LATENCY	BIT(12)
 #define STMMAC_FLAG_DISABLE_FORCE_1000	BIT(13)
 #define STMMAC_FLAG_DISABLE_HALF_DUPLEX	BIT(14)
+#define STMMAC_FLAG_DISABLE_FLOW_CONTROL	BIT(15)
 
 struct plat_stmmacenet_data {
 	int bus_id;
-- 
2.31.4