qcacmn: Add filter logic according to timestamp in scan

Currently the driver does not have any mechanism to filter
out the scan results according to the age.

Add a logic in the scan filter API, to filter out the scan
result according to the age threshold, so that APs which
are older than a particular value are filtered out.

Change-Id: If3f4b372b28a0f75b1d70915df4e3e1a7e518931
CRs-Fixed: 2447988

umac/scan/core/src/wlan_scan_cache_db.c

@@ -312,11 +312,11 @@ scm_get_next_node(struct scan_dbs *scan_db,
  */
 static void scm_check_and_age_out(struct scan_dbs *scan_db,
 	struct scan_cache_node *node,
-	uint32_t scan_aging_time)
+	qdf_time_t scan_aging_time)
 {
 	if (util_scan_entry_age(node->entry) >=
 	   scan_aging_time) {
-		scm_debug("Aging out BSSID: %pM with age %d ms",
+		scm_debug("Aging out BSSID: %pM with age %lu ms",
 			  node->entry->bssid.bytes,
 			  util_scan_entry_age(node->entry));
 		qdf_spin_lock_bh(&scan_db->scan_db_lock);
@@ -401,7 +401,7 @@ static QDF_STATUS scm_flush_oldest_entry(struct scan_dbs *scan_db)
 	}
 
 	if (oldest_node) {
-		scm_debug("Flush oldest BSSID: %pM with age %d ms",
+		scm_debug("Flush oldest BSSID: %pM with age %lu ms",
 				oldest_node->entry->bssid.bytes,
 				util_scan_entry_age(oldest_node->entry));
 		/* Release ref_cnt taken for oldest_node and delete it */

umac/scan/core/src/wlan_scan_filter.c

@@ -1150,6 +1150,10 @@ bool scm_filter_match(struct wlan_objmgr_psoc *psoc,
 
 	roam_params = &def_param->roam_params;
 
+	if (filter->age_threshold && filter->age_threshold <
+					util_scan_entry_age(db_entry))
+		return false;
+
 	if (filter->p2p_results && !db_entry->is_p2p)
 		return false;
 

umac/scan/core/src/wlan_scan_main.h

@@ -380,7 +380,7 @@ struct scan_default_params {
 	uint32_t burst_duration;
 	uint32_t max_scan_time;
 	uint32_t num_probes;
-	uint32_t scan_cache_aging_time;
+	qdf_time_t scan_cache_aging_time;
 	uint32_t select_5ghz_margin;
 	bool enable_mac_spoofing;
 	bool is_bssid_hint_priority;

umac/scan/dispatcher/inc/wlan_scan_public_structs.h

@@ -566,7 +566,7 @@ struct fils_filter_info {
 struct scan_filter {
 	bool bss_scoring_required;
 	bool enable_adaptive_11r;
-	uint32_t age_threshold;
+	qdf_time_t age_threshold;
 	uint32_t p2p_results;
 	uint32_t rrm_measurement_filter;
 	uint32_t num_of_bssid;

umac/scan/dispatcher/inc/wlan_scan_utils_api.h

@@ -1140,10 +1140,10 @@ util_scan_entry_wmeparam(struct scan_cache_entry *scan_entry)
  *
  * Return: age in ms
  */
-static inline uint32_t
+static inline qdf_time_t
 util_scan_entry_age(struct scan_cache_entry *scan_entry)
 {
-	unsigned long ts = scan_entry->scan_entry_time;
+	qdf_time_t ts = scan_entry->scan_entry_time;
 
 	return qdf_mc_timer_get_system_time() - ts;
 }