From b9d8b856689d2b968495d79fe653d87fcb8ad98c Mon Sep 17 00:00:00 2001
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Sun, 12 Apr 2026 10:43:26 +0200
Subject: [PATCH] net: airoha: Add missing PPE configurations in
 airoha_ppe_hw_init()

Add the following PPE configuration in airoha_ppe_hw_init routine:
- 6RD hw offloading is currently not supported by Netfilter flowtable.
  Disable explicitly PPE 6RD offloading in order to prevent PPE to learn
  6RD flows and eventually interrupt the traffic.
- Add missing PPE bind rate configuration for L3 and L2 traffic.
  PPE bind rate configuration specifies the pps threshold to move a PPE
  entry state from UNBIND to BIND. Without this configuration this value
  is random.
- Set ageing thresholds to the values used in the vendor SDK in order to
  improve connection stability under load and avoid packet loss caused by
  fast aging.

Fixes: 00a7678310fe3 ("net: airoha: Introduce flowtable offload support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260412-airoha_ppe_hw_init-missing-bits-v1-1-06ac670819e3@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
 drivers/net/ethernet/airoha/airoha_ppe.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/airoha/airoha_ppe.c
+++ b/drivers/net/ethernet/airoha/airoha_ppe.c
@@ -125,13 +125,13 @@ static void airoha_ppe_hw_init(struct ai
 		airoha_fe_rmw(eth, REG_PPE_BND_AGE0(i),
 			      PPE_BIND_AGE0_DELTA_NON_L4 |
 			      PPE_BIND_AGE0_DELTA_UDP,
-			      FIELD_PREP(PPE_BIND_AGE0_DELTA_NON_L4, 1) |
-			      FIELD_PREP(PPE_BIND_AGE0_DELTA_UDP, 12));
+			      FIELD_PREP(PPE_BIND_AGE0_DELTA_NON_L4, 60) |
+			      FIELD_PREP(PPE_BIND_AGE0_DELTA_UDP, 60));
 		airoha_fe_rmw(eth, REG_PPE_BND_AGE1(i),
 			      PPE_BIND_AGE1_DELTA_TCP_FIN |
 			      PPE_BIND_AGE1_DELTA_TCP,
 			      FIELD_PREP(PPE_BIND_AGE1_DELTA_TCP_FIN, 1) |
-			      FIELD_PREP(PPE_BIND_AGE1_DELTA_TCP, 7));
+			      FIELD_PREP(PPE_BIND_AGE1_DELTA_TCP, 60));
 
 		airoha_fe_rmw(eth, REG_PPE_TB_HASH_CFG(i),
 			      PPE_SRAM_TABLE_EN_MASK |
@@ -159,7 +159,15 @@ static void airoha_ppe_hw_init(struct ai
 			      FIELD_PREP(PPE_DRAM_TB_NUM_ENTRY_MASK,
 					 dram_num_entries));
 
+		airoha_fe_rmw(eth, REG_PPE_BIND_RATE(i),
+			      PPE_BIND_RATE_L2B_BIND_MASK |
+			      PPE_BIND_RATE_BIND_MASK,
+			      FIELD_PREP(PPE_BIND_RATE_L2B_BIND_MASK, 0x1e) |
+			      FIELD_PREP(PPE_BIND_RATE_BIND_MASK, 0x1e));
+
 		airoha_fe_wr(eth, REG_PPE_HASH_SEED(i), PPE_HASH_SEED);
+		airoha_fe_clear(eth, REG_PPE_PPE_FLOW_CFG(i),
+				PPE_FLOW_CFG_IP6_6RD_MASK);
 
 		for (p = 0; p < ARRAY_SIZE(eth->ports); p++) {
 			struct airoha_gdm_port *port = eth->ports[p];
