ice: support turning on/off the parser's double vlan mode

Add API ice_parser_dvm_set() to support turning on/off the parser's double
vlan mode.
Reviewed-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Signed-off-by: Junfeng Guo <junfeng.guo@intel.com>
Co-developed-by: Ahmed Zaki <ahmed.zaki@intel.com>
Signed-off-by: Ahmed Zaki <ahmed.zaki@intel.com>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/ice/ice_parser.c

@@ -597,6 +597,32 @@ static struct ice_metainit_item *ice_metainit_table_get(struct ice_hw *hw)
 				       ice_metainit_parse_item, false);
 }
 
+/**
+ * ice_bst_tcam_search - find a TCAM item with specific type
+ * @tcam_table: the TCAM table
+ * @lbl_table: the lbl table to search
+ * @type: the type we need to match against
+ * @start: start searching from this index
+ *
+ * Return: a pointer to the matching BOOST TCAM item or NULL.
+ */
+struct ice_bst_tcam_item *
+ice_bst_tcam_search(struct ice_bst_tcam_item *tcam_table,
+		    struct ice_lbl_item *lbl_table,
+		    enum ice_lbl_type type, u16 *start)
+{
+	u16 i = *start;
+
+	for (; i < ICE_BST_TCAM_TABLE_SIZE; i++) {
+		if (lbl_table[i].type == type) {
+			*start = i;
+			return &tcam_table[lbl_table[i].idx];
+		}
+	}
+
+	return NULL;
+}
+
 /*** ICE_SID_RXPARSER_CAM, ICE_SID_RXPARSER_PG_SPILL,
  *    ICE_SID_RXPARSER_NOMATCH_CAM and ICE_SID_RXPARSER_NOMATCH_CAM
  *    sections ***/
@@ -1151,6 +1177,7 @@ static void ice_lbl_dump(struct ice_hw *hw, struct ice_lbl_item *item)
 	struct device *dev = ice_hw_to_dev(hw);
 
 	dev_info(dev, "index = %u\n", item->idx);
+	dev_info(dev, "type = %u\n", item->type);
 	dev_info(dev, "label = %s\n", item->label);
 }
 
@@ -1340,12 +1367,21 @@ static struct ice_bst_tcam_item *ice_bst_tcam_table_get(struct ice_hw *hw)
 }
 
 static void ice_parse_lbl_item(struct ice_hw *hw, u16 idx, void *item,
-			       void *data, int size)
+			       void *data, int __maybe_unused size)
 {
-	memcpy(item, data, size);
+	struct ice_lbl_item *lbl_item = item;
+	struct ice_lbl_item *lbl_data = data;
+
+	lbl_item->idx = lbl_data->idx;
+	memcpy(lbl_item->label, lbl_data->label, sizeof(lbl_item->label));
+
+	if (strstarts(lbl_item->label, ICE_LBL_BST_DVM))
+		lbl_item->type = ICE_LBL_BST_TYPE_DVM;
+	else if (strstarts(lbl_item->label, ICE_LBL_BST_SVM))
+		lbl_item->type = ICE_LBL_BST_TYPE_SVM;
 
 	if (hw->debug_mask & ICE_DBG_PARSER)
-		ice_lbl_dump(hw, (struct ice_lbl_item *)item);
+		ice_lbl_dump(hw, lbl_item);
 }
 
 /**
@@ -2132,3 +2168,39 @@ void ice_parser_result_dump(struct ice_hw *hw, struct ice_parser_result *rslt)
 	dev_info(dev, "flags_fd = 0x%04x\n", rslt->flags_fd);
 	dev_info(dev, "flags_rss = 0x%04x\n", rslt->flags_rss);
 }
+
+#define ICE_BT_VLD_KEY	0xFF
+#define ICE_BT_INV_KEY	0xFE
+
+static void ice_bst_dvm_set(struct ice_parser *psr, enum ice_lbl_type type,
+			    bool on)
+{
+	u16 i = 0;
+
+	while (true) {
+		struct ice_bst_tcam_item *item;
+		u8 key;
+
+		item = ice_bst_tcam_search(psr->bst_tcam_table,
+					   psr->bst_lbl_table,
+					   type, &i);
+		if (!item)
+			break;
+
+		key = on ? ICE_BT_VLD_KEY : ICE_BT_INV_KEY;
+		item->key[ICE_BT_VM_OFF] = key;
+		item->key_inv[ICE_BT_VM_OFF] = key;
+		i++;
+	}
+}
+
+/**
+ * ice_parser_dvm_set - configure double vlan mode for parser
+ * @psr: pointer to a parser instance
+ * @on: true to turn on; false to turn off
+ */
+void ice_parser_dvm_set(struct ice_parser *psr, bool on)
+{
+	ice_bst_dvm_set(psr, ICE_LBL_BST_TYPE_DVM, on);
+	ice_bst_dvm_set(psr, ICE_LBL_BST_TYPE_SVM, !on);
+}

drivers/net/ethernet/intel/ice/ice_parser.h

@@ -274,13 +274,29 @@ struct ice_bst_tcam_item {
 };
 
 #define ICE_LBL_LEN			64
+#define ICE_LBL_BST_DVM			"BOOST_MAC_VLAN_DVM"
+#define ICE_LBL_BST_SVM			"BOOST_MAC_VLAN_SVM"
+
+enum ice_lbl_type {
+	ICE_LBL_BST_TYPE_UNKNOWN,
+	ICE_LBL_BST_TYPE_DVM,
+	ICE_LBL_BST_TYPE_SVM,
+};
+
 struct ice_lbl_item {
 	u16 idx;
 	char label[ICE_LBL_LEN];
+
+	/* must be at the end, not part of the DDP section */
+	enum ice_lbl_type type;
 };
 
 struct ice_bst_tcam_item *
 ice_bst_tcam_match(struct ice_bst_tcam_item *tcam_table, u8 *pat);
+struct ice_bst_tcam_item *
+ice_bst_tcam_search(struct ice_bst_tcam_item *tcam_table,
+		    struct ice_lbl_item *lbl_table,
+		    enum ice_lbl_type type, u16 *start);
 
 /*** ICE_SID_RXPARSER_MARKER_PTYPE section ***/
 #define ICE_PTYPE_MK_TCAM_TABLE_SIZE	1024
@@ -429,6 +445,7 @@ struct ice_parser_proto_off {
 
 #define ICE_PARSER_PROTO_OFF_PAIR_SIZE	16
 #define ICE_PARSER_FLAG_PSR_SIZE	8
+#define ICE_BT_VM_OFF			0
 
 struct ice_parser_result {
 	u16 ptype;	/* 16 bits hardware PTYPE */
@@ -477,6 +494,7 @@ struct ice_parser {
 
 struct ice_parser *ice_parser_create(struct ice_hw *hw);
 void ice_parser_destroy(struct ice_parser *psr);
+void ice_parser_dvm_set(struct ice_parser *psr, bool on);
 int ice_parser_run(struct ice_parser *psr, const u8 *pkt_buf,
 		   int pkt_len, struct ice_parser_result *rslt);
 void ice_parser_result_dump(struct ice_hw *hw, struct ice_parser_result *rslt);