Commit b9d8b856 authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Paolo Abeni
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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: 00a76783 ("net: airoha: Introduce flowtable offload support")
Signed-off-by: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: default avatarSimon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260412-airoha_ppe_hw_init-missing-bits-v1-1-06ac670819e3@kernel.org


Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent 1acdfbdb

drivers/net/ethernet/airoha/airoha_ppe.c

+11 −3
Original line number Diff line number Diff line
@@ -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),