qcacld-3.0: Enable/disable roaming based on active NDP sessions

Currently, active NDP sessions are tracked on the platforms
where NAN concurrency handling is supported by host through policy
mgr. Roaming is disabled when an active NDP session is present and
re-enabled when the last NDP session is teardown. But this tracking
is not supported on legacy platforms(which don't advertise either
WMI_SERVICE_NDI_DBS_SUPPORT or WMI_SERVICE_NAN_DISABLE_SUPPORT) as
policy mgr based tracking is not available.
So, disable roaming when the first NDP connection happens and
re-enable when the last peer is departed from HDD APIs in such
legacy platforms.

Change-Id: I6309af12eab9222dc34a79566f7830b7763826de
CRs-Fixed: 2846541

core/hdd/src/wlan_hdd_main.c

@@ -1586,7 +1586,8 @@ void hdd_indicate_active_ndp_cnt(struct wlan_objmgr_psoc *psoc,
 
 	adapter = wlan_hdd_get_adapter_from_vdev(psoc, vdev_id);
 	if (adapter && cfg_nan_is_roam_config_disabled(psoc)) {
-		hdd_debug("vdev_id:%d ndp active sessions %d", vdev_id, cnt);
+		hdd_debug("vdev_id:%d%s active ndp sessions present", vdev_id,
+			  cnt ? "" : " no more");
 		if (!cnt)
 			wlan_hdd_enable_roaming(adapter, RSO_NDP_CON_ON_NDI);
 		else

core/hdd/src/wlan_hdd_nan_datapath.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2020 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2016-2021 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -949,6 +949,12 @@ int hdd_ndp_new_peer_handler(uint8_t vdev_id, uint16_t sta_id,
 					adapter,
 					WLAN_START_ALL_NETIF_QUEUE_N_CARRIER,
 					WLAN_CONTROL_PATH);
+		/*
+		 * This is called only for first peer. So, no.of NDP sessions
+		 * are always 1
+		 */
+		if (!NDI_CONCURRENCY_SUPPORTED(hdd_ctx->psoc))
+			hdd_indicate_active_ndp_cnt(hdd_ctx->psoc, vdev_id, 1);
 	}
 	qdf_mem_free(roam_info);
 	return 0;
@@ -1021,5 +1027,11 @@ void hdd_ndp_peer_departed_handler(uint8_t vdev_id, uint16_t sta_id,
 		hdd_debug("No more ndp peers.");
 		hdd_cleanup_ndi(hdd_ctx, adapter);
 		qdf_event_set(&adapter->peer_cleanup_done);
+		/*
+		 * This is called only for last peer. So, no.of NDP sessions
+		 * are always 0
+		 */
+		if (!NDI_CONCURRENCY_SUPPORTED(hdd_ctx->psoc))
+			hdd_indicate_active_ndp_cnt(hdd_ctx->psoc, vdev_id, 0);
 	}
 }