qcacld-3.0: Send the trigger reason as part of roam scan stats

Notif_param of Roam event ID carries the trigger reason as part
of roam scan start notif. Currently host doesn't read this param.
This commit reads the trigger reason and sends it to user-space
via vendor attribute whenever the roam event vendor command is
enabled.

Change-Id: If9fdbc31df149f4f1c9ca196ee74e2fcb3709a1c
CRs-Fixed: 3161803

components/umac/mlme/connection_mgr/dispatcher/inc/wlan_cm_roam_api.h

@@ -970,10 +970,12 @@ cm_akm_roam_allowed(struct wlan_objmgr_psoc *psoc,
  * cm_invalid_roam_reason_handler() - Handler for invalid roam reason
  * @vdev_id: vdev id
  * @notif: roam notification of type enum cm_roam_notif
+ * @reason: Notif param value from the roam event that carries trigger reason
  *
  * Return: QDF_STATUS
  */
-void cm_invalid_roam_reason_handler(uint32_t vdev_id, enum cm_roam_notif notif);
+void cm_invalid_roam_reason_handler(uint32_t vdev_id, enum cm_roam_notif notif,
+				    uint32_t reason);
 
 /**
  * cm_handle_roam_reason_ho_failed() - Handler for roam due to ho failure
@@ -1090,6 +1092,7 @@ wlan_cm_get_roam_rt_stats(struct wlan_objmgr_psoc *psoc,
  * @roam_info: Roam stats from the roam stats event
  * @value:     Notif param value from the roam event
  * @idx:       TLV index in roam stats event
+ * @reason:    Notif param value from the roam event that carries trigger reason
  *
  * Gathers the roam stats from the roam event and the roam stats event and
  * sends them to hdd for filling the vendor attributes.
@@ -1100,7 +1103,7 @@ void cm_report_roam_rt_stats(struct wlan_objmgr_psoc *psoc,
 			     uint8_t vdev_id,
 			     enum roam_rt_stats_type events,
 			     struct roam_stats_event *roam_info,
-			     uint32_t value, uint8_t idx);
+			     uint32_t value, uint8_t idx, uint32_t reason);
 /**
  * cm_roam_candidate_event_handler() - CM callback to save roam
  * candidate entry in scan db
@@ -1419,7 +1422,7 @@ static inline void
 cm_report_roam_rt_stats(struct wlan_objmgr_psoc *psoc,
 			uint8_t vdev_id, enum roam_rt_stats_type events,
 			struct roam_stats_event *roam_info,
-			uint32_t value, uint8_t idx)
+			uint32_t value, uint8_t idx, uint32_t reason)
 {}
 
 static inline QDF_STATUS

components/umac/mlme/connection_mgr/dispatcher/src/wlan_cm_roam_api.c

@@ -2413,7 +2413,8 @@ cm_handle_roam_offload_events(struct roam_offload_roam_event *roam_event)
 	break;
 	case ROAM_REASON_INVALID:
 		cm_invalid_roam_reason_handler(roam_event->vdev_id,
-					       roam_event->notif);
+					       roam_event->notif,
+					       roam_event->notif_params);
 		break;
 	default:
 		break;
@@ -3247,7 +3248,7 @@ void cm_report_roam_rt_stats(struct wlan_objmgr_psoc *psoc,
 			     uint8_t vdev_id,
 			     enum roam_rt_stats_type events,
 			     struct roam_stats_event *roam_info,
-			     uint32_t value, uint8_t idx)
+			     uint32_t value, uint8_t idx, uint32_t reason)
 {
 	struct roam_stats_event *roam_event = NULL;
 
@@ -3262,12 +3263,18 @@ void cm_report_roam_rt_stats(struct wlan_objmgr_psoc *psoc,
 		if (!roam_event)
 			return;
 
-		if (value == WMI_ROAM_NOTIF_SCAN_START)
+		if (value == WMI_ROAM_NOTIF_SCAN_START) {
 			roam_event->roam_event_param.roam_scan_state =
 					QCA_WLAN_VENDOR_ROAM_SCAN_STATE_START;
-		else if (value == WMI_ROAM_NOTIF_SCAN_END)
+			if (reason) {
+				roam_event->trigger[idx].present = true;
+				roam_event->trigger[idx].trigger_reason =
+							 reason;
+			}
+		} else if (value == WMI_ROAM_NOTIF_SCAN_END) {
 			roam_event->roam_event_param.roam_scan_state =
 					QCA_WLAN_VENDOR_ROAM_SCAN_STATE_END;
+		}
 
 		mlme_debug("Invoke HDD roam events callback for roam "
 			   "scan notif");
@@ -3399,7 +3406,7 @@ log_btm_frames_only:
 
 	cm_report_roam_rt_stats(psoc, stats_info->vdev_id,
 				ROAM_RT_STATS_TYPE_ROAM_SCAN_INFO,
-				stats_info, 0, i);
+				stats_info, 0, i, 0);
 }
 
 #ifdef WLAN_FEATURE_ROAM_INFO_STATS
@@ -4097,7 +4104,7 @@ cm_roam_stats_event_handler(struct wlan_objmgr_psoc *psoc,
 
 		cm_report_roam_rt_stats(psoc, stats_info->vdev_id,
 					ROAM_RT_STATS_TYPE_ROAM_SCAN_INFO,
-					stats_info, 0, i);
+					stats_info, 0, i, 0);
 	}
 
 	if (!stats_info->num_tlv) {

core/wma/src/wma_scan_roam.c

@@ -2561,7 +2561,8 @@ void wma_handle_roam_sync_timeout(tp_wma_handle wma_handle,
 					CM_ROAM_NOTIF_ROAM_ABORT);
 }
 
-void cm_invalid_roam_reason_handler(uint32_t vdev_id, enum cm_roam_notif notif)
+void cm_invalid_roam_reason_handler(uint32_t vdev_id, enum cm_roam_notif notif,
+				    uint32_t reason)
 {
 	tp_wma_handle wma_handle = cds_get_context(QDF_MODULE_ID_WMA);
 
@@ -2575,7 +2576,7 @@ void cm_invalid_roam_reason_handler(uint32_t vdev_id, enum cm_roam_notif notif)
 	    notif == CM_ROAM_NOTIF_SCAN_END)
 		cm_report_roam_rt_stats(wma_handle->psoc, vdev_id,
 					ROAM_RT_STATS_TYPE_SCAN_STATE,
-					NULL, notif, 0);
+					NULL, notif, 0, reason);
 }
 #endif
 
@@ -2740,7 +2741,7 @@ cm_handle_roam_reason_invoke_roam_fail(uint8_t vdev_id,	uint32_t notif_params,
 						notif_params);
 	cm_report_roam_rt_stats(wma_handle->psoc, vdev_id,
 				ROAM_RT_STATS_TYPE_INVOKE_FAIL_REASON,
-				NULL, notif_params, 0);
+				NULL, notif_params, 0, 0);
 }
 
 void