net: hns3: add support for external loopback test

This patch add support for external loopback test.
The successful test need the link is up with duplex full. The
driver do external loopback first, and then the whole offline
test.

Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 82f83e3f8162..db099549e511 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -5827,6 +5827,57 @@ int hns3_set_channels(struct net_device *netdev,
 	return 0;
 }
 
+void hns3_external_lb_prepare(struct net_device *ndev, bool if_running)
+{
+	struct hns3_nic_priv *priv = netdev_priv(ndev);
+	struct hnae3_handle *h = priv->ae_handle;
+	int i;
+
+	if (!if_running)
+		return;
+
+	netif_carrier_off(ndev);
+	netif_tx_disable(ndev);
+
+	for (i = 0; i < priv->vector_num; i++)
+		hns3_vector_disable(&priv->tqp_vector[i]);
+
+	for (i = 0; i < h->kinfo.num_tqps; i++)
+		hns3_tqp_disable(h->kinfo.tqp[i]);
+
+	/* delay ring buffer clearing to hns3_reset_notify_uninit_enet
+	 * during reset process, because driver may not be able
+	 * to disable the ring through firmware when downing the netdev.
+	 */
+	if (!hns3_nic_resetting(ndev))
+		hns3_nic_reset_all_ring(priv->ae_handle);
+
+	hns3_reset_tx_queue(priv->ae_handle);
+}
+
+void hns3_external_lb_restore(struct net_device *ndev, bool if_running)
+{
+	struct hns3_nic_priv *priv = netdev_priv(ndev);
+	struct hnae3_handle *h = priv->ae_handle;
+	int i;
+
+	if (!if_running)
+		return;
+
+	hns3_nic_reset_all_ring(priv->ae_handle);
+
+	for (i = 0; i < priv->vector_num; i++)
+		hns3_vector_enable(&priv->tqp_vector[i]);
+
+	for (i = 0; i < h->kinfo.num_tqps; i++)
+		hns3_tqp_enable(h->kinfo.tqp[i]);
+
+	netif_tx_wake_all_queues(ndev);
+
+	if (h->ae_algo->ops->get_status(h))
+		netif_carrier_on(ndev);
+}
+
 static const struct hns3_hw_error_info hns3_hw_err[] = {
 	{ .type = HNAE3_PPU_POISON_ERROR,
 	  .msg = "PPU poison" },