net: airoha: Fix smac_id configuration in bridge mode

Set PPE entry smac_id field to 0xf in airoha_ppe_foe_commit_subflow_entry
routine for IPv6 traffic in order to instruct the hw to keep original
source mac address for IPv6 hw accelerated traffic in bridge mode.

Fixes: cd53f622611f ("net: airoha: Add L2 hw acceleration support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250602-airoha-flowtable-ipv6-fix-v2-3-3287f8b55214@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/drivers/net/ethernet/airoha/airoha_ppe.c b/drivers/net/ethernet/airoha/airoha_ppe.c
index 557779093a79a4b42a1dc49b8ba0dacbdc219385..9067d2fc7706ecf489bee9fc9b6425de18acb634 100644 (file)
--- a/drivers/net/ethernet/airoha/airoha_ppe.c
+++ b/drivers/net/ethernet/airoha/airoha_ppe.c
@@ -660,6 +660,11 @@ airoha_ppe_foe_commit_subflow_entry(struct airoha_ppe *ppe,
        if (type >= PPE_PKT_TYPE_IPV6_ROUTE_3T) {
                memcpy(&hwe.ipv6.l2, &e->data.bridge.l2, sizeof(hwe.ipv6.l2));
                hwe.ipv6.ib2 = e->data.bridge.ib2;
+               /* setting smac_id to 0xf instruct the hw to keep original
+                * source mac address
+                */
+               hwe.ipv6.l2.src_mac_hi = FIELD_PREP(AIROHA_FOE_MAC_SMAC_ID,
+                                                   0xf);
        } else {
                memcpy(&hwe.bridge.l2, &e->data.bridge.l2,
                       sizeof(hwe.bridge.l2));