1 files changed, 45 insertions, 0 deletions

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
index 8f83e91f8146..5462b7efcf2f 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -406,6 +406,8 @@ int aq_nic_start(struct aq_nic_s *self)
 
 	INIT_WORK(&self->service_task, aq_nic_service_task);
 
+	aq_nic_set_loopback(self);
+
 	timer_setup(&self->service_timer, aq_nic_service_timer_cb, 0);
 	aq_nic_service_timer_cb(&self->service_timer);
 
@@ -625,6 +627,11 @@ int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb)
 
 	aq_ring_update_queue_state(ring);
 
+	if (self->aq_nic_cfg.priv_flags & BIT(AQ_HW_LOOPBACK_DMA_NET)) {
+		err = NETDEV_TX_BUSY;
+		goto err_exit;
+	}
+
 	/* Above status update may stop the queue. Check this. */
 	if (__netif_subqueue_stopped(self->ndev, ring->idx)) {
 		err = NETDEV_TX_BUSY;
@@ -973,6 +980,44 @@ u32 aq_nic_get_fw_version(struct aq_nic_s *self)
 	return fw_version;
 }
 
+int aq_nic_set_loopback(struct aq_nic_s *self)
+{
+	struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
+
+	if (!self->aq_hw_ops->hw_set_loopback ||
+	    !self->aq_fw_ops->set_phyloopback)
+		return -ENOTSUPP;
+
+	mutex_lock(&self->fwreq_mutex);
+	self->aq_hw_ops->hw_set_loopback(self->aq_hw,
+					 AQ_HW_LOOPBACK_DMA_SYS,
+					 !!(cfg->priv_flags &
+					    BIT(AQ_HW_LOOPBACK_DMA_SYS)));
+
+	self->aq_hw_ops->hw_set_loopback(self->aq_hw,
+					 AQ_HW_LOOPBACK_PKT_SYS,
+					 !!(cfg->priv_flags &
+					    BIT(AQ_HW_LOOPBACK_PKT_SYS)));
+
+	self->aq_hw_ops->hw_set_loopback(self->aq_hw,
+					 AQ_HW_LOOPBACK_DMA_NET,
+					 !!(cfg->priv_flags &
+					    BIT(AQ_HW_LOOPBACK_DMA_NET)));
+
+	self->aq_fw_ops->set_phyloopback(self->aq_hw,
+					 AQ_HW_LOOPBACK_PHYINT_SYS,
+					 !!(cfg->priv_flags &
+					    BIT(AQ_HW_LOOPBACK_PHYINT_SYS)));
+
+	self->aq_fw_ops->set_phyloopback(self->aq_hw,
+					 AQ_HW_LOOPBACK_PHYEXT_SYS,
+					 !!(cfg->priv_flags &
+					    BIT(AQ_HW_LOOPBACK_PHYEXT_SYS)));
+	mutex_unlock(&self->fwreq_mutex);
+
+	return 0;
+}
+
 int aq_nic_stop(struct aq_nic_s *self)
 {
 	struct aq_vec_s *aq_vec = NULL;