netdev - [PATCH net-next 10/12] net: airoha: Select default ppe cpu port in airoha_dev

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Message-Id: <20251015-an7583-eth-support-v1-10-064855f05923@kernel.org>
Date: Wed, 15 Oct 2025 09:15:10 +0200
From: Lorenzo Bianconi <lorenzo@...nel.org>
To: 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>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Philipp Zabel <p.zabel@...gutronix.de>, 
 Lorenzo Bianconi <lorenzo@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, netdev@...r.kernel.org, 
 devicetree@...r.kernel.org
Subject: [PATCH net-next 10/12] net: airoha: Select default ppe cpu port in
 airoha_dev_init()

Select PPE default cpu port in airoha_dev_init routine.
For PPE2 always use secondary cpu port. For PPE1 select cpu port
according to the running QDMA.

Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
 drivers/net/ethernet/airoha/airoha_eth.c | 38 ++++++++++++++------------------
 1 file changed, 16 insertions(+), 22 deletions(-)

diff --git a/drivers/net/ethernet/airoha/airoha_eth.c b/drivers/net/ethernet/airoha/airoha_eth.c
index 99e7fea52c6db9c4686fcef368f21e25f21ced58..5f6b5ab52e0265f7bb56b008ca653d64e04ff2d2 100644
--- a/drivers/net/ethernet/airoha/airoha_eth.c
+++ b/drivers/net/ethernet/airoha/airoha_eth.c
@@ -531,25 +531,6 @@ static int airoha_fe_init(struct airoha_eth *eth)
 	/* disable IFC by default */
 	airoha_fe_clear(eth, REG_FE_CSR_IFC_CFG, FE_IFC_EN_MASK);
 
-	airoha_fe_wr(eth, REG_PPE_DFT_CPORT0(0),
-		     FIELD_PREP(DFT_CPORT_MASK(7), FE_PSE_PORT_CDM1) |
-		     FIELD_PREP(DFT_CPORT_MASK(6), FE_PSE_PORT_CDM1) |
-		     FIELD_PREP(DFT_CPORT_MASK(5), FE_PSE_PORT_CDM1) |
-		     FIELD_PREP(DFT_CPORT_MASK(4), FE_PSE_PORT_CDM1) |
-		     FIELD_PREP(DFT_CPORT_MASK(3), FE_PSE_PORT_CDM1) |
-		     FIELD_PREP(DFT_CPORT_MASK(2), FE_PSE_PORT_CDM1) |
-		     FIELD_PREP(DFT_CPORT_MASK(1), FE_PSE_PORT_CDM1) |
-		     FIELD_PREP(DFT_CPORT_MASK(0), FE_PSE_PORT_CDM1));
-	airoha_fe_wr(eth, REG_PPE_DFT_CPORT0(1),
-		     FIELD_PREP(DFT_CPORT_MASK(7), FE_PSE_PORT_CDM2) |
-		     FIELD_PREP(DFT_CPORT_MASK(6), FE_PSE_PORT_CDM2) |
-		     FIELD_PREP(DFT_CPORT_MASK(5), FE_PSE_PORT_CDM2) |
-		     FIELD_PREP(DFT_CPORT_MASK(4), FE_PSE_PORT_CDM2) |
-		     FIELD_PREP(DFT_CPORT_MASK(3), FE_PSE_PORT_CDM2) |
-		     FIELD_PREP(DFT_CPORT_MASK(2), FE_PSE_PORT_CDM2) |
-		     FIELD_PREP(DFT_CPORT_MASK(1), FE_PSE_PORT_CDM2) |
-		     FIELD_PREP(DFT_CPORT_MASK(0), FE_PSE_PORT_CDM2));
-
 	/* enable 1:N vlan action, init vlan table */
 	airoha_fe_set(eth, REG_MC_VLAN_EN, MC_VLAN_EN_MASK);
 
@@ -1756,8 +1737,10 @@ static void airhoha_set_gdm2_loopback(struct airoha_gdm_port *port)
 static int airoha_dev_init(struct net_device *dev)
 {
 	struct airoha_gdm_port *port = netdev_priv(dev);
-	struct airoha_eth *eth = port->qdma->eth;
-	u32 pse_port;
+	struct airoha_qdma *qdma = port->qdma;
+	struct airoha_eth *eth = qdma->eth;
+	u32 pse_port, fe_cpu_port;
+	u8 ppe_id;
 
 	airoha_set_macaddr(port, dev->dev_addr);
 
@@ -1770,16 +1753,27 @@ static int airoha_dev_init(struct net_device *dev)
 		fallthrough;
 	case 2:
 		if (airoha_ppe_is_enabled(eth, 1)) {
+			/* For PPE2 always use secondary cpu port. */
+			fe_cpu_port = FE_PSE_PORT_CDM2;
 			pse_port = FE_PSE_PORT_PPE2;
 			break;
 		}
 		fallthrough;
-	default:
+	default: {
+		u8 qdma_id = qdma - &eth->qdma[0];
+
+		/* For PPE1 select cpu port according to the running QDMA. */
+		fe_cpu_port = qdma_id ? FE_PSE_PORT_CDM2 : FE_PSE_PORT_CDM1;
 		pse_port = FE_PSE_PORT_PPE1;
 		break;
 	}
+	}
 
 	airoha_set_gdm_port_fwd_cfg(eth, REG_GDM_FWD_CFG(port->id), pse_port);
+	ppe_id = pse_port == FE_PSE_PORT_PPE2 ? 1 : 0;
+	airoha_fe_rmw(eth, REG_PPE_DFT_CPORT0(ppe_id),
+		      DFT_CPORT_MASK(port->id),
+		      fe_cpu_port << __ffs(DFT_CPORT_MASK(port->id)));
 
 	return 0;
 }

-- 
2.51.0