qcacld-3.0: Send DISCONNECT event to IPA in roaming

Send STA_DISCONNECT event to IPA before sending STA_CONNECT in roaming
scenario. This is needed by IPA to cleanup in roaming scenario. Without
the event, IPA may not be able to setup routing tables in IPA hardware
properly.

Change-Id: I694736654a137718cd250c28d3c4681a1007ce9a
CRs-Fixed: 2739550

components/ipa/core/src/wlan_ipa_core.c

@@ -1860,6 +1860,47 @@ void wlan_ipa_uc_bw_monitor(struct wlan_ipa_priv *ipa_ctx, bool stop)
 }
 #endif
 
+/**
+ * wlan_ipa_send_msg() - Allocate and send message to IPA
+ * @net_dev: Interface net device
+ * @type: event enum of type ipa_wlan_event
+ * @mac_address: MAC address associated with the event
+ *
+ * Return: QDF STATUS
+ */
+static QDF_STATUS wlan_ipa_send_msg(qdf_netdev_t net_dev,
+				    qdf_ipa_wlan_event type,
+				    uint8_t *mac_addr)
+{
+	qdf_ipa_msg_meta_t meta;
+	qdf_ipa_wlan_msg_t *msg;
+
+	QDF_IPA_MSG_META_MSG_LEN(&meta) = sizeof(qdf_ipa_wlan_msg_t);
+
+	msg = qdf_mem_malloc(QDF_IPA_MSG_META_MSG_LEN(&meta));
+
+	if (!msg) {
+		ipa_err("msg allocation failed");
+		return QDF_STATUS_E_NOMEM;
+	}
+
+	QDF_IPA_SET_META_MSG_TYPE(&meta, type);
+	strlcpy(QDF_IPA_WLAN_MSG_NAME(msg), net_dev->name, IPA_RESOURCE_NAME_MAX);
+	qdf_mem_copy(QDF_IPA_WLAN_MSG_MAC_ADDR(msg), mac_addr, QDF_NET_ETH_LEN);
+
+	ipa_debug("%s: Evt: %d", QDF_IPA_WLAN_MSG_NAME(msg), QDF_IPA_MSG_META_MSG_TYPE(&meta));
+
+	if (qdf_ipa_send_msg(&meta, msg, wlan_ipa_msg_free_fn)) {
+		ipa_err("%s: Evt: %d fail",
+			QDF_IPA_WLAN_MSG_NAME(msg),
+			QDF_IPA_MSG_META_MSG_TYPE(&meta));
+		qdf_mem_free(msg);
+		return QDF_STATUS_E_FAILURE;
+	}
+
+	return QDF_STATUS_SUCCESS;
+}
+
 /**
  * __wlan_ipa_wlan_evt() - IPA event handler
  * @net_dev: Interface net device
@@ -2033,6 +2074,15 @@ static QDF_STATUS __wlan_ipa_wlan_evt(qdf_netdev_t net_dev, uint8_t device_mode,
 					ipa_ctx, net_dev, QDF_STA_MODE);
 			if (iface_ctx)
 				wlan_ipa_cleanup_iface(iface_ctx);
+			status = wlan_ipa_send_msg(net_dev,
+						   QDF_IPA_STA_DISCONNECT,
+						   mac_addr);
+			if (status != QDF_STATUS_SUCCESS) {
+				ipa_err("QDF_IPA_STA_DISCONNECT send failed %u",
+					status);
+				qdf_mutex_release(&ipa_ctx->event_lock);
+				goto end;
+			}
 		}
 
 		status = wlan_ipa_setup_iface(ipa_ctx, net_dev, device_mode,