qcacmn: Add AST entry for Destination MAC in RX path

Because of a HW issue we have added a WAR where we do
learning even on destination MAC address. This will ensure
da_is_valid even for forwarding traffic and HW will cache
this entry for subsequent pkts there by we achieve better
throughput in UL.

Change-Id: Ib61693e9ce52b3a1cdcd4c34eabb3d8368b1ef13

dp/inc/cdp_txrx_cmn_struct.h

@@ -313,6 +313,7 @@ enum cdp_txrx_ast_entry_type {
 	CDP_TXRX_AST_TYPE_MEC,	/* Multicast echo ast entry type */
 	CDP_TXRX_AST_TYPE_WDS_HM, /* HM WDS entry */
 	CDP_TXRX_AST_TYPE_STA_BSS,	 /* BSS entry(STA mode) */
+	CDP_TXRX_AST_TYPE_DA,	/* AST entry based on Destination address */
 	CDP_TXRX_AST_TYPE_MAX
 };
 

dp/wifi3.0/dp_main.c

@@ -872,7 +872,7 @@ static void dp_print_ast_stats(struct dp_soc *soc)
 	struct dp_peer *peer;
 	struct dp_ast_entry *ase, *tmp_ase;
 	char type[CDP_TXRX_AST_TYPE_MAX][10] = {
-			"NONE", "STATIC", "SELF", "WDS", "MEC", "HMWDS", "BSS"};
+		"NONE", "STATIC", "SELF", "WDS", "MEC", "HMWDS", "BSS", "DA"};
 
 	DP_PRINT_STATS("AST Stats:");
 	DP_PRINT_STATS("	Entries Added   = %d", soc->stats.ast.added);

dp/wifi3.0/dp_peer.c

@@ -587,6 +587,10 @@ int dp_peer_add_ast(struct dp_soc *soc,
 		ast_entry->next_hop = 1;
 		ast_entry->type = CDP_TXRX_AST_TYPE_MEC;
 		break;
+	case CDP_TXRX_AST_TYPE_DA:
+		ast_entry->next_hop = 1;
+		ast_entry->type = CDP_TXRX_AST_TYPE_DA;
+		break;
 	default:
 		QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
 			FL("Incorrect AST entry type"));
@@ -598,7 +602,8 @@ int dp_peer_add_ast(struct dp_soc *soc,
 	dp_peer_ast_hash_add(soc, ast_entry);
 	qdf_spin_unlock_bh(&soc->ast_lock);
 
-	if (ast_entry->type == CDP_TXRX_AST_TYPE_MEC)
+	if (ast_entry->type == CDP_TXRX_AST_TYPE_MEC ||
+	    ast_entry->type == CDP_TXRX_AST_TYPE_DA)
 		qdf_mem_copy(next_node_mac, peer->vdev->mac_addr.raw, 6);
 	else
 		qdf_mem_copy(next_node_mac, peer->mac_addr.raw, 6);

dp/wifi3.0/dp_rx.c

@@ -336,6 +336,46 @@ dp_get_vdev_from_peer(struct dp_soc *soc,
 }
 #endif
 
+/**
+ * dp_rx_da_learn() - Add AST entry based on DA lookup
+ *			This is a WAR for HK 1.0 and will
+ *			be removed in HK 2.0
+ *
+ * @soc: core txrx main context
+ * @rx_tlv_hdr	: start address of rx tlvs
+ * @sa_peer	: source peer entry
+ * @nbuf	: nbuf to retrieve destination mac for which AST will be added
+ *
+ */
+#ifdef FEATURE_WDS
+static void
+dp_rx_da_learn(struct dp_soc *soc,
+	       uint8_t *rx_tlv_hdr,
+	       struct dp_peer *ta_peer,
+	       qdf_nbuf_t nbuf)
+{
+	if (ta_peer && (ta_peer->vdev->opmode != wlan_op_mode_ap))
+		return;
+
+	if (qdf_unlikely(!hal_rx_msdu_end_da_is_valid_get(rx_tlv_hdr) &&
+			 !hal_rx_msdu_end_da_is_mcbc_get(rx_tlv_hdr))) {
+		dp_peer_add_ast(soc,
+				ta_peer,
+				qdf_nbuf_data(nbuf),
+				CDP_TXRX_AST_TYPE_DA,
+				IEEE80211_NODE_F_WDS_HM);
+	}
+}
+#else
+static void
+dp_rx_da_learn(struct dp_soc *soc,
+	       uint8_t *rx_tlv_hdr,
+	       struct dp_peer *ta_peer,
+	       qdf_nbuf_t nbuf)
+{
+}
+#endif
+
 /**
  * dp_rx_intrabss_fwd() - Implements the Intra-BSS forwarding logic
  *
@@ -371,6 +411,11 @@ dp_rx_intrabss_fwd(struct dp_soc *soc,
 		if (!ast_entry)
 			return false;
 
+		if (ast_entry->type == CDP_TXRX_AST_TYPE_DA) {
+			ast_entry->is_active = TRUE;
+			return false;
+		}
+
 		da_peer = ast_entry->peer;
 
 		if (!da_peer)
@@ -1668,9 +1713,11 @@ done:
 			       htt_cmn_pkt_type_ethernet) &&
 		    qdf_likely(!vdev->mesh_vdev)) {
 			/* WDS Source Port Learning */
-			if (vdev->wds_enabled)
+			if (vdev->wds_enabled) {
+				dp_rx_da_learn(soc, rx_tlv_hdr, peer, nbuf);
 				dp_rx_wds_srcport_learn(soc, rx_tlv_hdr,
 							peer, nbuf);
+			}
 
 			/* Intrabss-fwd */
 			if (dp_rx_check_ap_bridge(vdev))