netdev - [PATCH iwl-next v2] ice: Support untagged VLAN traffic in br offload

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Message-Id: <20230728083042.13326-1-wojciech.drewek@intel.com>
Date: Fri, 28 Jul 2023 10:30:42 +0200
From: Wojciech Drewek <wojciech.drewek@...el.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org,
	pmenzel@...gen.mpg.de
Subject: [PATCH iwl-next v2] ice: Support untagged VLAN traffic in br offload

When driver receives SWITCHDEV_FDB_ADD_TO_DEVICE notification
with vid = 1, it means that we have to offload untagged traffic.
This is achieved by adding vlan metadata lookup.

Signed-off-by: Wojciech Drewek <wojciech.drewek@...el.com>
---
v2: remove unrelated changes, fix typos, add comment in
    ice_eswitch_br_get_lkups_cnt
---
 drivers/net/ethernet/intel/ice/ice_eswitch_br.c | 10 +++++++---
 drivers/net/ethernet/intel/ice/ice_eswitch_br.h |  9 ---------
 2 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_eswitch_br.c b/drivers/net/ethernet/intel/ice/ice_eswitch_br.c
index 67bfd1f61cdd..5b425260b0eb 100644
--- a/drivers/net/ethernet/intel/ice/ice_eswitch_br.c
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch_br.c
@@ -104,13 +104,18 @@ ice_eswitch_br_rule_delete(struct ice_hw *hw, struct ice_rule_query_data *rule)
 static u16
 ice_eswitch_br_get_lkups_cnt(u16 vid)
 {
-	return ice_eswitch_br_is_vid_valid(vid) ? 2 : 1;
+	/* if vid == 0 then we need only one lookup (ICE_MAC_OFOS),
+	 * otherwise we need both mac and vlan
+	 */
+	return vid == 0 ? 1 : 2;
 }
 
 static void
 ice_eswitch_br_add_vlan_lkup(struct ice_adv_lkup_elem *list, u16 vid)
 {
-	if (ice_eswitch_br_is_vid_valid(vid)) {
+	if (vid == 1) {
+		ice_rule_add_vlan_metadata(&list[1]);
+	} else if (vid > 1) {
 		list[1].type = ICE_VLAN_OFOS;
 		list[1].h_u.vlan_hdr.vlan = cpu_to_be16(vid & VLAN_VID_MASK);
 		list[1].m_u.vlan_hdr.vlan = cpu_to_be16(0xFFFF);
@@ -400,7 +405,6 @@ ice_eswitch_br_fdb_entry_create(struct net_device *netdev,
 	unsigned long event;
 	int err;
 
-	/* untagged filtering is not yet supported */
 	if (!(bridge->flags & ICE_ESWITCH_BR_VLAN_FILTERING) && vid)
 		return;
 
diff --git a/drivers/net/ethernet/intel/ice/ice_eswitch_br.h b/drivers/net/ethernet/intel/ice/ice_eswitch_br.h
index 85a8fadb2928..cf7b0e5acfcb 100644
--- a/drivers/net/ethernet/intel/ice/ice_eswitch_br.h
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch_br.h
@@ -103,15 +103,6 @@ struct ice_esw_br_vlan {
 		     struct ice_esw_br_fdb_work, \
 		     work)
 
-static inline bool ice_eswitch_br_is_vid_valid(u16 vid)
-{
-	/* In trunk VLAN mode, for untagged traffic the bridge sends requests
-	 * to offload VLAN 1 with pvid and untagged flags set. Since these
-	 * flags are not supported, add a MAC filter instead.
-	 */
-	return vid > 1;
-}
-
 void
 ice_eswitch_br_offloads_deinit(struct ice_pf *pf);
 int
-- 
2.40.1