qcacmn: Support for smart monitor on HKv2

Add support for smart monitor feature on HKv2.
For HKv2, NAC filtering is done by HW and NAC is
programmed directly in the AST table. The NAC entries
in AST table have monitor direct bit set and this
is obtained by host via monitor status ring.
host subscribes for packet header in MD packets.

To these filtered packets radiotap header is added
and delivered to the stack.

Change-Id: I123f986531943e376ac5c492540e01f0b03348c4

dp/wifi3.0/dp_rx.h

@@ -405,6 +405,9 @@ dp_rx_wds_srcport_learn(struct dp_soc *soc,
 	struct dp_ast_entry *ast;
 	uint16_t sa_idx;
 	bool del_in_progress;
+	uint8_t sa_is_valid;
+	struct dp_neighbour_peer *neighbour_peer = NULL;
+	struct dp_pdev *pdev = ta_peer->vdev->pdev;
 
 	if (qdf_unlikely(!ta_peer))
 		return;
@@ -432,7 +435,8 @@ dp_rx_wds_srcport_learn(struct dp_soc *soc,
 	memcpy(wds_src_mac, (qdf_nbuf_data(nbuf) + IEEE80211_ADDR_LEN),
 		IEEE80211_ADDR_LEN);
 
-	if (qdf_unlikely(!hal_rx_msdu_end_sa_is_valid_get(rx_tlv_hdr))) {
+	sa_is_valid = hal_rx_msdu_end_sa_is_valid_get(rx_tlv_hdr);
+	if (qdf_unlikely(!sa_is_valid)) {
 		ret = dp_peer_add_ast(soc,
 					ta_peer,
 					wds_src_mac,
@@ -486,8 +490,38 @@ dp_rx_wds_srcport_learn(struct dp_soc *soc,
 					      wds_src_mac,
 					      CDP_TXRX_AST_TYPE_WDS,
 					      flags);
+			return;
+		} else {
+			/* In HKv2 smart monitor case, when NAC client is
+			 * added first and this client roams within BSS to
+			 * connect to RE, since we have an AST entry for
+			 * NAC we get sa_is_valid bit set. So we check if
+			 * smart monitor is enabled and send add_ast command
+			 * to FW.
+			 */
+			if (pdev->neighbour_peers_added) {
+				qdf_spin_lock_bh(&pdev->neighbour_peer_mutex);
+				TAILQ_FOREACH(neighbour_peer,
+					      &pdev->neighbour_peers_list,
+					      neighbour_peer_list_elem) {
+					if (!qdf_mem_cmp(&neighbour_peer->neighbour_peers_macaddr,
+							 wds_src_mac,
+							 DP_MAC_ADDR_LEN)) {
+						ret = dp_peer_add_ast(soc,
+								      ta_peer,
+								      wds_src_mac,
+								      CDP_TXRX_AST_TYPE_WDS,
+								      flags);
+						QDF_TRACE(QDF_MODULE_ID_DP,
+							  QDF_TRACE_LEVEL_INFO,
+							  "sa valid and nac roamed to wds");
+						break;
+					}
+				}
+				qdf_spin_unlock_bh(&pdev->neighbour_peer_mutex);
+			}
+			return;
 		}
-		return;
 	}