ice: Add support for VLAN TPID filters in switchdev

Enable support for adding TC rules that filter on the VLAN tag type
in switchdev mode.

Signed-off-by: Martyna Szapar-Mudlaw <martyna.szapar-mudlaw@intel.com>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 56 insertions, 3 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_switch.c b/drivers/net/ethernet/intel/ice/ice_switch.c
index 85816a73f09f..4f1066fd9a46 100644
--- a/drivers/net/ethernet/intel/ice/ice_switch.c
+++ b/drivers/net/ethernet/intel/ice/ice_switch.c
@@ -5536,10 +5536,11 @@ static bool ice_tun_type_match_word(enum ice_sw_tunnel_type tun_type, u16 *mask)
  * ice_add_special_words - Add words that are not protocols, such as metadata
  * @rinfo: other information regarding the rule e.g. priority and action info
  * @lkup_exts: lookup word structure
+ * @dvm_ena: is double VLAN mode enabled
  */
 static int
 ice_add_special_words(struct ice_adv_rule_info *rinfo,
-		      struct ice_prot_lkup_ext *lkup_exts)
+		      struct ice_prot_lkup_ext *lkup_exts, bool dvm_ena)
 {
 	u16 mask;
 
@@ -5558,6 +5559,19 @@ ice_add_special_words(struct ice_adv_rule_info *rinfo,
 		}
 	}
 
+	if (rinfo->vlan_type != 0 && dvm_ena) {
+		if (lkup_exts->n_val_words < ICE_MAX_CHAIN_WORDS) {
+			u8 word = lkup_exts->n_val_words++;
+
+			lkup_exts->fv_words[word].prot_id = ICE_META_DATA_ID_HW;
+			lkup_exts->fv_words[word].off = ICE_VLAN_FLAG_MDID_OFF;
+			lkup_exts->field_mask[word] =
+					ICE_PKT_FLAGS_0_TO_15_VLAN_FLAGS_MASK;
+		} else {
+			return -ENOSPC;
+		}
+	}
+
 	return 0;
 }
 
@@ -5677,7 +5691,7 @@ ice_add_adv_recipe(struct ice_hw *hw, struct ice_adv_lkup_elem *lkups,
 	/* Create any special protocol/offset pairs, such as looking at tunnel
 	 * bits by extracting metadata
 	 */
-	status = ice_add_special_words(rinfo, lkup_exts);
+	status = ice_add_special_words(rinfo, lkup_exts, ice_is_dvm_ena(hw));
 	if (status)
 		goto err_free_lkup_exts;
 
@@ -6011,6 +6025,36 @@ ice_fill_adv_packet_tun(struct ice_hw *hw, enum ice_sw_tunnel_type tun_type,
 }
 
 /**
+ * ice_fill_adv_packet_vlan - fill dummy packet with VLAN tag type
+ * @vlan_type: VLAN tag type
+ * @pkt: dummy packet to fill in
+ * @offsets: offset info for the dummy packet
+ */
+static int
+ice_fill_adv_packet_vlan(u16 vlan_type, u8 *pkt,
+			 const struct ice_dummy_pkt_offsets *offsets)
+{
+	u16 i;
+
+	/* Find VLAN header and insert VLAN TPID */
+	for (i = 0; offsets[i].type != ICE_PROTOCOL_LAST; i++) {
+		if (offsets[i].type == ICE_VLAN_OFOS ||
+		    offsets[i].type == ICE_VLAN_EX) {
+			struct ice_vlan_hdr *hdr;
+			u16 offset;
+
+			offset = offsets[i].offset;
+			hdr = (struct ice_vlan_hdr *)&pkt[offset];
+			hdr->type = cpu_to_be16(vlan_type);
+
+			return 0;
+		}
+	}
+
+	return -EIO;
+}
+
+/**
  * ice_find_adv_rule_entry - Search a rule entry
  * @hw: pointer to the hardware structure
  * @lkups: lookup elements or match criteria for the advanced recipe, one
@@ -6045,6 +6089,7 @@ ice_find_adv_rule_entry(struct ice_hw *hw, struct ice_adv_lkup_elem *lkups,
 			}
 		if (rinfo->sw_act.flag == list_itr->rule_info.sw_act.flag &&
 		    rinfo->tun_type == list_itr->rule_info.tun_type &&
+		    rinfo->vlan_type == list_itr->rule_info.vlan_type &&
 		    lkups_matched)
 			return list_itr;
 	}
@@ -6333,6 +6378,14 @@ ice_add_adv_rule(struct ice_hw *hw, struct ice_adv_lkup_elem *lkups,
 			goto err_ice_add_adv_rule;
 	}
 
+	if (rinfo->vlan_type != 0 && ice_is_dvm_ena(hw)) {
+		status = ice_fill_adv_packet_vlan(rinfo->vlan_type,
+						  s_rule->hdr_data,
+						  profile->offsets);
+		if (status)
+			goto err_ice_add_adv_rule;
+	}
+
 	status = ice_aq_sw_rules(hw, (struct ice_aqc_sw_rules *)s_rule,
 				 rule_buf_sz, 1, ice_aqc_opc_add_sw_rules,
 				 NULL);
@@ -6570,7 +6623,7 @@ ice_rem_adv_rule(struct ice_hw *hw, struct ice_adv_lkup_elem *lkups,
 	/* Create any special protocol/offset pairs, such as looking at tunnel
 	 * bits by extracting metadata
 	 */
-	status = ice_add_special_words(rinfo, &lkup_exts);
+	status = ice_add_special_words(rinfo, &lkup_exts, ice_is_dvm_ena(hw));
 	if (status)
 		return status;