netdev - [PATCH net-next 6/6] net: bcmasp: Add support for PHY interrupts

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Message-Id: <20240222205644.707326-7-justin.chen@broadcom.com>
Date: Thu, 22 Feb 2024 12:56:44 -0800
From: Justin Chen <justin.chen@...adcom.com>
To: netdev@...r.kernel.org
Cc: bcm-kernel-feedback-list@...adcom.com,
	florian.fainelli@...adcom.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org,
	opendmb@...il.com,
	andrew@...n.ch,
	hkallweit1@...il.com,
	linux@...linux.org.uk,
	rafal@...ecki.pl,
	devicetree@...r.kernel.org,
	Justin Chen <justin.chen@...adcom.com>
Subject: [PATCH net-next 6/6] net: bcmasp: Add support for PHY interrupts

Hook up the phy interrupts for internal phys to reduce mdio traffic
and improve responsiveness of link changes.

Signed-off-by: Justin Chen <justin.chen@...adcom.com>
---
 drivers/net/ethernet/broadcom/asp2/bcmasp.c     | 17 +++++++++++++++++
 drivers/net/ethernet/broadcom/asp2/bcmasp.h     |  4 ++++
 .../net/ethernet/broadcom/asp2/bcmasp_intf.c    |  5 +++++
 3 files changed, 26 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp.c b/drivers/net/ethernet/broadcom/asp2/bcmasp.c
index 3086b0b9b784..a2627c2a6e45 100644
--- a/drivers/net/ethernet/broadcom/asp2/bcmasp.c
+++ b/drivers/net/ethernet/broadcom/asp2/bcmasp.c
@@ -31,6 +31,20 @@ static void _intr2_mask_set(struct bcmasp_priv *priv, u32 mask)
 	priv->irq_mask |= mask;
 }
 
+void bcmasp_enable_phy_irq(struct bcmasp_intf *intf, int en)
+{
+	struct bcmasp_priv *priv = intf->parent;
+
+	/* Only supported with internal phys */
+	if (!intf->internal_phy)
+		return;
+
+	if (en)
+		_intr2_mask_clear(priv, ASP_INTR2_PHY_EVENT(intf->channel));
+	else
+		_intr2_mask_set(priv, ASP_INTR2_PHY_EVENT(intf->channel));
+}
+
 void bcmasp_enable_tx_irq(struct bcmasp_intf *intf, int en)
 {
 	struct bcmasp_priv *priv = intf->parent;
@@ -79,6 +93,9 @@ static void bcmasp_intr2_handling(struct bcmasp_intf *intf, u32 status)
 			__napi_schedule_irqoff(&intf->tx_napi);
 		}
 	}
+
+	if (status & ASP_INTR2_PHY_EVENT(intf->channel))
+		phy_mac_interrupt(intf->ndev->phydev);
 }
 
 static irqreturn_t bcmasp_isr(int irq, void *data)
diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp.h b/drivers/net/ethernet/broadcom/asp2/bcmasp.h
index 127a5340625e..f93cb3da44b0 100644
--- a/drivers/net/ethernet/broadcom/asp2/bcmasp.h
+++ b/drivers/net/ethernet/broadcom/asp2/bcmasp.h
@@ -19,6 +19,8 @@
 #define ASP_INTR2_TX_DESC(intr)			BIT((intr) + 14)
 #define ASP_INTR2_UMC0_WAKE			BIT(22)
 #define ASP_INTR2_UMC1_WAKE			BIT(28)
+#define ASP_INTR2_PHY_EVENT(intr)		((intr) ? BIT(30) | BIT(31) : \
+						BIT(24) | BIT(25))
 
 #define ASP_WAKEUP_INTR2_OFFSET			0x1200
 #define  ASP_WAKEUP_INTR2_STATUS		0x0
@@ -556,6 +558,8 @@ void bcmasp_enable_tx_irq(struct bcmasp_intf *intf, int en);
 
 void bcmasp_enable_rx_irq(struct bcmasp_intf *intf, int en);
 
+void bcmasp_enable_phy_irq(struct bcmasp_intf *intf, int en);
+
 void bcmasp_flush_rx_port(struct bcmasp_intf *intf);
 
 extern const struct ethtool_ops bcmasp_ethtool_ops;
diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c b/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c
index 1aed28b06309..a2fa8dcbe387 100644
--- a/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c
+++ b/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c
@@ -382,6 +382,7 @@ static void bcmasp_netif_start(struct net_device *dev)
 
 	bcmasp_enable_rx_irq(intf, 1);
 	bcmasp_enable_tx_irq(intf, 1);
+	bcmasp_enable_phy_irq(intf, 1);
 
 	phy_start(dev->phydev);
 }
@@ -890,6 +891,7 @@ static void bcmasp_netif_deinit(struct net_device *dev)
 	/* Disable interrupts */
 	bcmasp_enable_tx_irq(intf, 0);
 	bcmasp_enable_rx_irq(intf, 0);
+	bcmasp_enable_phy_irq(intf, 0);
 
 	netif_napi_del(&intf->tx_napi);
 	netif_napi_del(&intf->rx_napi);
@@ -1027,6 +1029,9 @@ static int bcmasp_netif_init(struct net_device *dev, bool phy_connect)
 			netdev_err(dev, "could not attach to PHY\n");
 			goto err_phy_disable;
 		}
+
+		if (intf->internal_phy)
+			dev->phydev->irq = PHY_MAC_INTERRUPT;
 	} else if (!intf->wolopts) {
 		ret = phy_resume(dev->phydev);
 		if (ret)
-- 
2.34.1


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