qcacld-3.0: Add API to notify channel switch to EasyMesh

When the channel of AP is changed, notify the new channel to
EasyMesh.

Change-Id: If38306110d5b69cb4d5211b49ea484ce4f6626bb
CRs-Fixed: 3371337

core/hdd/src/wlan_hdd_hostapd.c

@@ -2797,6 +2797,8 @@ QDF_STATUS hdd_hostapd_sap_event_cb(struct sap_event *sap_event,
 				hdd_debug("set hw mode change not done");
 		}
 
+		hdd_son_deliver_chan_change_event(
+			adapter, sap_event->sapevt.sap_ch_selected.pri_ch_freq);
 		return hdd_hostapd_chan_change(adapter, sap_event);
 	case eSAP_ACS_SCAN_SUCCESS_EVENT:
 		return hdd_handle_acs_scan_event(sap_event, adapter);

core/hdd/src/wlan_hdd_son.c

@@ -2698,6 +2698,39 @@ void hdd_son_deliver_peer_authorize_event(struct hdd_adapter *adapter,
 	hdd_objmgr_put_vdev_by_user(vdev, WLAN_SON_ID);
 }
 
+int hdd_son_deliver_chan_change_event(struct hdd_adapter *adapter,
+				      qdf_freq_t freq)
+{
+	int ret = -EINVAL;
+	struct wlan_objmgr_vdev *vdev;
+	struct son_ald_chan_change_info chan_info;
+	struct wlan_objmgr_pdev *pdev;
+
+	if (!adapter) {
+		hdd_err("null adapter");
+		return ret;
+	}
+	vdev = hdd_objmgr_get_vdev_by_user(adapter, WLAN_SON_ID);
+	if (!vdev) {
+		hdd_err("null vdev");
+		return ret;
+	}
+	pdev = wlan_vdev_get_pdev(vdev);
+	if (!pdev) {
+		hdd_err("null pdev");
+		hdd_objmgr_put_vdev_by_user(vdev, WLAN_SON_ID);
+		return ret;
+	}
+	chan_info.freq = freq;
+	chan_info.chan_num = wlan_reg_freq_to_chan(pdev, freq);
+	ret = os_if_son_deliver_ald_event(vdev, NULL,
+					  MLME_EVENT_CHAN_CHANGE,
+					  &chan_info);
+	hdd_objmgr_put_vdev_by_user(vdev, WLAN_SON_ID);
+
+	return ret;
+}
+
 int hdd_son_send_set_wifi_generic_command(struct wiphy *wiphy,
 					  struct wireless_dev *wdev,
 					  struct nlattr **tb)

core/hdd/src/wlan_hdd_son.h

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2021, The Linux Foundation. All rights reserved.
- * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. 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 above
@@ -122,6 +122,16 @@ int hdd_son_send_get_wifi_generic_command(struct wiphy *wiphy,
  */
 uint32_t hdd_son_get_peer_max_mcs_idx(struct wlan_objmgr_vdev *vdev,
 				      struct wlan_objmgr_peer *peer);
+
+/**
+ * hdd_son_deliver_chan_change_event() - send chan change to SON
+ * @adapter: pointer to adapter
+ * @freq: new operating channel frequency
+ *
+ * Return: 0 on success
+ */
+int hdd_son_deliver_chan_change_event(struct hdd_adapter *adapter,
+				      qdf_freq_t freq);
 #else
 
 static inline void hdd_son_register_callbacks(struct hdd_context *hdd_ctx)
@@ -179,5 +189,11 @@ uint32_t hdd_son_get_peer_max_mcs_idx(struct wlan_objmgr_vdev *vdev,
 	return 0;
 }
 
+static inline
+int hdd_son_deliver_chan_change_event(struct hdd_adapter *adapter,
+				      qdf_freq_t freq)
+{
+	return 0;
+}
 #endif /* WLAN_FEATURE_SON */
 #endif