qcacmn: add a flag in AST entry to indicate AST map

Add a flag for AST entry to indicate if AST entry is
mapped to AST table and use this flag while dereferncing
ast table with ast_index in ast_entry

Change-Id: I8c90f3c40116e24303aac8a7bd53e8f5b67e22bf

dp/wifi3.0/dp_peer.c

@@ -466,6 +466,7 @@ static inline void dp_peer_map_ast(struct dp_soc *soc,
 		ast_entry->is_active = TRUE;
 		peer_type = ast_entry->type;
 		ast_entry->ast_hash_value = ast_hash;
+		ast_entry->is_mapped = TRUE;
 	}
 
 	if (ast_entry || (peer->vdev && peer->vdev->proxysta_vdev)) {
@@ -574,7 +575,7 @@ add_ast_entry:
 	ast_entry->peer = peer;
 	ast_entry->pdev_id = vdev->pdev->pdev_id;
 	ast_entry->vdev_id = vdev->vdev_id;
-	ast_entry->ast_idx = DP_INVALID_AST_IDX;
+	ast_entry->is_mapped = false;
 
 	switch (type) {
 	case CDP_TXRX_AST_TYPE_STATIC:
@@ -649,10 +650,10 @@ void dp_peer_del_ast(struct dp_soc *soc, struct dp_ast_entry *ast_entry)
 		dp_peer_ast_send_wds_del(soc, ast_entry);
 	} else {
 		/*
-		 * For TYPE_SELF (STA mode), no T2H_PEER_MAP message to map
-		 * the peer, hence no need to clear ast_table here.
+		 * release the reference only if it is mapped
+		 * to ast_table
 		 */
-		if (ast_entry->type != CDP_TXRX_AST_TYPE_SELF)
+		if (ast_entry->is_mapped)
 			soc->ast_table[ast_entry->ast_idx] = NULL;
 		TAILQ_REMOVE(&peer->ast_entry_list, ast_entry, ase_list_elem);
 
@@ -686,10 +687,10 @@ void dp_peer_del_ast(struct dp_soc *soc, struct dp_ast_entry *ast_entry)
 						ast_entry->mac_addr.raw);
 
 	/*
-	 * For TYPE_SELF (STA mode), no T2H_PEER_MAP message to map the peer,
-	 * hence no need to clear ast_table here.
+	 * release the reference only if it is mapped
+	 * to ast_table
 	 */
-	if (ast_entry->type != CDP_TXRX_AST_TYPE_SELF)
+	if (ast_entry->is_mapped)
 		soc->ast_table[ast_entry->ast_idx] = NULL;
 	TAILQ_REMOVE(&peer->ast_entry_list, ast_entry, ase_list_elem);
 
@@ -903,7 +904,12 @@ void dp_peer_ast_free_entry(struct dp_soc *soc,
 {
 	struct dp_peer *peer = ast_entry->peer;
 
-	soc->ast_table[ast_entry->ast_idx] = NULL;
+	/*
+	 * release the reference only if it is mapped
+	 * to ast_table
+	 */
+	if (ast_entry->is_mapped)
+		soc->ast_table[ast_entry->ast_idx] = NULL;
 	TAILQ_REMOVE(&peer->ast_entry_list, ast_entry, ase_list_elem);
 	DP_STATS_INC(soc, ast.deleted, 1);
 	dp_peer_ast_hash_remove(soc, ast_entry);

dp/wifi3.0/dp_rx.h

@@ -479,7 +479,7 @@ dp_rx_wds_srcport_learn(struct dp_soc *soc,
 	 * There is a possibility we might arrive here without
 	 * AST MAP event , so this check is mandatory
 	 */
-	if (ast->ast_idx == sa_idx)
+	if (ast->is_mapped && (ast->ast_idx == sa_idx))
 		ast->is_active = TRUE;
 
 	if (sa_sw_peer_id != ta_peer->peer_ids[0]) {
@@ -743,7 +743,7 @@ static inline QDF_STATUS dp_rx_ast_set_active(struct dp_soc *soc, uint16_t sa_id
 	 * There is a possibility we might arrive here without
 	 * AST MAP event , so this check is mandatory
 	 */
-	if (ast && (ast->ast_idx == sa_idx)) {
+	if (ast && ast->is_mapped && (ast->ast_idx == sa_idx)) {
 		ast->is_active = is_active;
 		qdf_spin_unlock_bh(&soc->ast_lock);
 		return QDF_STATUS_SUCCESS;

dp/wifi3.0/dp_rx_err.c

@@ -132,6 +132,7 @@ static inline bool dp_rx_mcast_echo_check(struct dp_soc *soc,
 			if (ase) {
 				ase->ast_idx = sa_idx;
 				soc->ast_table[sa_idx] = ase;
+				ase->is_mapped = TRUE;
 			}
 		}
 	} else

dp/wifi3.0/dp_types.h

@@ -636,7 +636,6 @@ union dp_align_mac_addr {
 	} align4_2;
 };
 
-#define DP_INVALID_AST_IDX 0xFFFF
 /*
  * dp_ast_entry
  *
@@ -649,6 +648,8 @@ union dp_align_mac_addr {
  *             (used for aging out/expiry)
  * @ase_list_elem: node in peer AST list
  * @is_bss: flag to indicate if entry corresponds to bss peer
+ * @is_mapped: flag to indicate that we have mapped the AST entry
+ *             in ast_table
  * @pdev_id: pdev ID
  * @vdev_id: vdev ID
  * @ast_hash_value: hast value in HW
@@ -666,6 +667,7 @@ struct dp_ast_entry {
 	bool next_hop;
 	bool is_active;
 	bool is_bss;
+	bool is_mapped;
 	uint8_t pdev_id;
 	uint8_t vdev_id;
 	uint16_t ast_hash_value;