qcacmn: Add API to get first vdev of given pdev

Add API to get first vdev of any given pdev.
Change spectral module's API accordingly.

CRs-Fixed: 2234801
Change-Id: I6c5f0aefad4a71610300810531b8c893471306ad

spectral/core/spectral_common.c

@@ -57,7 +57,7 @@ spectral_get_vdev(struct wlan_objmgr_pdev *pdev)
 
 	qdf_assert_always(pdev);
 
-	vdev = wlan_objmgr_get_vdev_by_id_from_pdev(pdev, 0, WLAN_SPECTRAL_ID);
+	vdev = wlan_objmgr_pdev_get_first_vdev(pdev, WLAN_SPECTRAL_ID);
 
 	if (!vdev) {
 		spectral_warn("Unable to get first vdev of pdev");

umac/cmn_services/obj_mgr/inc/wlan_objmgr_pdev_obj.h

@@ -735,6 +735,19 @@ QDF_STATUS wlan_objmgr_pdev_try_get_ref(struct wlan_objmgr_pdev *pdev,
 void wlan_objmgr_pdev_release_ref(struct wlan_objmgr_pdev *pdev,
 						wlan_objmgr_ref_dbgid id);
 
+/**
+ * wlan_objmgr_pdev_get_first_vdev() - Get first vdev of pdev
+ * @pdev: PDEV object
+ * @dbg_id:   Object Manager ref debug id
+ *
+ * API to get reference to first vdev of pdev.
+ *
+ * Return: reference to first vdev
+ */
+struct wlan_objmgr_vdev *wlan_objmgr_pdev_get_first_vdev(
+		struct wlan_objmgr_pdev *pdev,
+		wlan_objmgr_ref_dbgid dbg_id);
+
 /**
  * wlan_objmgr_pdev_get_pdev_id() - get pdev id
  * @pdev: PDEV object

umac/cmn_services/obj_mgr/src/wlan_objmgr_pdev_obj.c

@@ -886,3 +886,42 @@ void wlan_objmgr_pdev_release_ref(struct wlan_objmgr_pdev *pdev,
 	return;
 }
 qdf_export_symbol(wlan_objmgr_pdev_release_ref);
+
+struct wlan_objmgr_vdev *wlan_objmgr_pdev_get_first_vdev(
+		struct wlan_objmgr_pdev *pdev,
+		wlan_objmgr_ref_dbgid dbg_id)
+{
+	struct wlan_objmgr_pdev_objmgr *objmgr = &pdev->pdev_objmgr;
+	qdf_list_t *vdev_list = NULL;
+	struct wlan_objmgr_vdev *vdev;
+	qdf_list_node_t *node = NULL;
+	qdf_list_node_t *prev_node = NULL;
+
+	wlan_pdev_obj_lock(pdev);
+
+	/* VDEV list */
+	vdev_list = &objmgr->wlan_vdev_list;
+	if (qdf_list_peek_front(vdev_list, &node) != QDF_STATUS_SUCCESS) {
+		wlan_pdev_obj_unlock(pdev);
+		return NULL;
+	}
+
+	do {
+		vdev = qdf_container_of(node, struct wlan_objmgr_vdev,
+					vdev_node);
+		if (wlan_objmgr_vdev_try_get_ref(vdev, dbg_id) ==
+						QDF_STATUS_SUCCESS) {
+			wlan_pdev_obj_unlock(pdev);
+			return vdev;
+		}
+
+		prev_node = node;
+	} while (qdf_list_peek_next(vdev_list, prev_node, &node) ==
+						QDF_STATUS_SUCCESS);
+
+	wlan_pdev_obj_unlock(pdev);
+
+	return NULL;
+}
+
+qdf_export_symbol(wlan_objmgr_pdev_get_first_vdev);