[PATCH net] net: airoha: Add missing PPE configurations in airoha_ppe_hw_init()

[Lorenzo Bianconi]

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 at kernel.org>
---
 drivers/net/ethernet/airoha/airoha_ppe.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/airoha/airoha_ppe.c b/drivers/net/ethernet/airoha/airoha_ppe.c
index c2c32b6833df..62cfffb4f0e5 100644
--- a/drivers/net/ethernet/airoha/airoha_ppe.c
+++ b/drivers/net/ethernet/airoha/airoha_ppe.c
@@ -111,13 +111,13 @@ static void airoha_ppe_hw_init(struct airoha_ppe *ppe)
 		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 |
@@ -145,7 +145,15 @@ static void airoha_ppe_hw_init(struct airoha_ppe *ppe)
 			      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++)
 			airoha_fe_rmw(eth, REG_PPE_MTU(i, p),

---
base-commit: 02f72964395911e7a09bb2ea2fe6f79eda4ea2c2
change-id: 20260412-airoha_ppe_hw_init-missing-bits-3d00a229adc1

Best regards,
-- 
Lorenzo Bianconi <lorenzo at kernel.org>