qcacld-3.0: Send full roam scan period to userspace upon querying

Userspace may query for current configured full roam scan period
through the vendor cmd QCA_WLAN_VENDOR_ROAMING_SUBCMD_CONTROL_GET
and the attribute QCA_ATTR_ROAM_CONTROL_FULL_SCAN_PERIOD.
Fill the full scan period in the same attribute and send as reply

Change-Id: I0ab8b3d7b469515244ce27accc852c6d93514b2d
CRs-Fixed: 2508804

core/hdd/src/wlan_hdd_cfg80211.c

@@ -4457,6 +4457,9 @@ hdd_roam_control_config_buf_size(struct hdd_context *hdd_ctx,
 	if (tb[QCA_ATTR_ROAM_CONTROL_STATUS])
 		skb_len += NLA_HDRLEN + sizeof(uint8_t);
 
+	if (tb[QCA_ATTR_ROAM_CONTROL_FULL_SCAN_PERIOD])
+		skb_len += NLA_HDRLEN + sizeof(uint32_t);
+
 	return skb_len;
 }
 
@@ -4479,6 +4482,7 @@ hdd_roam_control_config_fill_data(struct hdd_context *hdd_ctx, uint8_t vdev_id,
 	QDF_STATUS status = QDF_STATUS_SUCCESS;
 	uint8_t roam_control;
 	struct nlattr *config;
+	uint32_t full_roam_scan_period;
 
 	config = nla_nest_start(skb, PARAM_ROAM_CONTROL_CONFIG);
 	if (!config)
@@ -4498,8 +4502,23 @@ hdd_roam_control_config_fill_data(struct hdd_context *hdd_ctx, uint8_t vdev_id,
 			return -ENOMEM;
 		}
 	}
-	nla_nest_end(skb, config);
 
+	if (tb[QCA_ATTR_ROAM_CONTROL_FULL_SCAN_PERIOD]) {
+		status = sme_get_full_roam_scan_period(hdd_ctx->mac_handle,
+						       vdev_id,
+						       &full_roam_scan_period);
+		if (QDF_IS_STATUS_ERROR(status))
+			goto out;
+		hdd_debug("full_roam_scan_period: %u", full_roam_scan_period);
+
+		if (nla_put_u32(skb, QCA_ATTR_ROAM_CONTROL_FULL_SCAN_PERIOD,
+				full_roam_scan_period)) {
+			hdd_info("failed to put full_roam_scan_period");
+			return -EINVAL;
+		}
+	}
+
+	nla_nest_end(skb, config);
 out:
 	return qdf_status_to_os_return(status);
 }

core/sme/inc/sme_api.h

@@ -3710,4 +3710,19 @@ QDF_STATUS sme_set_roam_config_enable(mac_handle_t mac_handle,
  */
 QDF_STATUS sme_get_roam_config_status(mac_handle_t mac_handle, uint8_t vdev_id,
 				      uint8_t *config_status);
+
+/**
+ * sme_get_full_roam_scan_period() - Get full roam scan period
+ * @mac_handle: Opaque handle to the MAC context
+ * @vdev_id: vdev id
+ * @full_roam_scan_period: Pointer of a buffer to fill the full roam scan period
+ *
+ * Get the full scan period cached in neighborRoamInfo and fill in the given
+ * buffer full_roam_scan_period.
+ *
+ * Return: QDF_STATUS
+ */
+QDF_STATUS sme_get_full_roam_scan_period(mac_handle_t mac_handle,
+					 uint8_t vdev_id,
+					 uint32_t *full_roam_scan_period);
 #endif /* #if !defined( __SME_API_H ) */

core/sme/src/common/sme_api.c

@@ -16161,3 +16161,29 @@ QDF_STATUS sme_get_roam_config_status(mac_handle_t mac_handle,
 
 	return status;
 }
+
+QDF_STATUS
+sme_get_full_roam_scan_period(mac_handle_t mac_handle, uint8_t vdev_id,
+			      uint32_t *full_roam_scan_period)
+{
+	struct mac_context *mac = MAC_CONTEXT(mac_handle);
+	QDF_STATUS status;
+	tpCsrNeighborRoamControlInfo neighbor_roam_info;
+
+	if (vdev_id >= WLAN_MAX_VDEVS) {
+		sme_err("Invalid vdev_id: %d", vdev_id);
+		return QDF_STATUS_E_INVAL;
+	}
+
+	status = sme_acquire_global_lock(&mac->sme);
+	if (QDF_IS_STATUS_ERROR(status)) {
+		sme_err("Failed to acquire sme lock; status: %d", status);
+		return status;
+	}
+	neighbor_roam_info = &mac->roam.neighborRoamInfo[vdev_id];
+	*full_roam_scan_period =
+		neighbor_roam_info->cfgParams.full_roam_scan_period;
+	sme_release_global_lock(&mac->sme);
+
+	return status;
+}