1 files changed, 62 insertions, 23 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 6416322d7c18..94feea3b2599 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -419,10 +419,10 @@ static void i40e_get_netdev_stats_struct_tx(struct i40e_ring *ring,
 	unsigned int start;
 
 	do {
-		start = u64_stats_fetch_begin_irq(&ring->syncp);
+		start = u64_stats_fetch_begin(&ring->syncp);
 		packets = ring->stats.packets;
 		bytes   = ring->stats.bytes;
-	} while (u64_stats_fetch_retry_irq(&ring->syncp, start));
+	} while (u64_stats_fetch_retry(&ring->syncp, start));
 
 	stats->tx_packets += packets;
 	stats->tx_bytes   += bytes;
@@ -472,10 +472,10 @@ static void i40e_get_netdev_stats_struct(struct net_device *netdev,
 		if (!ring)
 			continue;
 		do {
-			start   = u64_stats_fetch_begin_irq(&ring->syncp);
+			start   = u64_stats_fetch_begin(&ring->syncp);
 			packets = ring->stats.packets;
 			bytes   = ring->stats.bytes;
-		} while (u64_stats_fetch_retry_irq(&ring->syncp, start));
+		} while (u64_stats_fetch_retry(&ring->syncp, start));
 
 		stats->rx_packets += packets;
 		stats->rx_bytes   += bytes;
@@ -897,10 +897,10 @@ static void i40e_update_vsi_stats(struct i40e_vsi *vsi)
 			continue;
 
 		do {
-			start = u64_stats_fetch_begin_irq(&p->syncp);
+			start = u64_stats_fetch_begin(&p->syncp);
 			packets = p->stats.packets;
 			bytes = p->stats.bytes;
-		} while (u64_stats_fetch_retry_irq(&p->syncp, start));
+		} while (u64_stats_fetch_retry(&p->syncp, start));
 		tx_b += bytes;
 		tx_p += packets;
 		tx_restart += p->tx_stats.restart_queue;
@@ -915,10 +915,10 @@ static void i40e_update_vsi_stats(struct i40e_vsi *vsi)
 			continue;
 
 		do {
-			start = u64_stats_fetch_begin_irq(&p->syncp);
+			start = u64_stats_fetch_begin(&p->syncp);
 			packets = p->stats.packets;
 			bytes = p->stats.bytes;
-		} while (u64_stats_fetch_retry_irq(&p->syncp, start));
+		} while (u64_stats_fetch_retry(&p->syncp, start));
 		rx_b += bytes;
 		rx_p += packets;
 		rx_buf += p->rx_stats.alloc_buff_failed;
@@ -935,10 +935,10 @@ static void i40e_update_vsi_stats(struct i40e_vsi *vsi)
 				continue;
 
 			do {
-				start = u64_stats_fetch_begin_irq(&p->syncp);
+				start = u64_stats_fetch_begin(&p->syncp);
 				packets = p->stats.packets;
 				bytes = p->stats.bytes;
-			} while (u64_stats_fetch_retry_irq(&p->syncp, start));
+			} while (u64_stats_fetch_retry(&p->syncp, start));
 			tx_b += bytes;
 			tx_p += packets;
 			tx_restart += p->tx_stats.restart_queue;
@@ -3694,6 +3694,24 @@ static int i40e_vsi_configure_tx(struct i40e_vsi *vsi)
 }
 
 /**
+ * i40e_calculate_vsi_rx_buf_len - Calculates buffer length
+ *
+ * @vsi: VSI to calculate rx_buf_len from
+ */
+static u16 i40e_calculate_vsi_rx_buf_len(struct i40e_vsi *vsi)
+{
+	if (!vsi->netdev || (vsi->back->flags & I40E_FLAG_LEGACY_RX))
+		return I40E_RXBUFFER_2048;
+
+#if (PAGE_SIZE < 8192)
+	if (!I40E_2K_TOO_SMALL_WITH_PADDING && vsi->netdev->mtu <= ETH_DATA_LEN)
+		return I40E_RXBUFFER_1536 - NET_IP_ALIGN;
+#endif
+
+	return PAGE_SIZE < 8192 ? I40E_RXBUFFER_3072 : I40E_RXBUFFER_2048;
+}
+
+/**
  * i40e_vsi_configure_rx - Configure the VSI for Rx
  * @vsi: the VSI being configured
  *
@@ -3704,20 +3722,14 @@ static int i40e_vsi_configure_rx(struct i40e_vsi *vsi)
 	int err = 0;
 	u16 i;
 
-	if (!vsi->netdev || (vsi->back->flags & I40E_FLAG_LEGACY_RX)) {
-		vsi->max_frame = I40E_MAX_RXBUFFER;
-		vsi->rx_buf_len = I40E_RXBUFFER_2048;
+	vsi->max_frame = I40E_MAX_RXBUFFER;
+	vsi->rx_buf_len = i40e_calculate_vsi_rx_buf_len(vsi);
+
 #if (PAGE_SIZE < 8192)
-	} else if (!I40E_2K_TOO_SMALL_WITH_PADDING &&
-		   (vsi->netdev->mtu <= ETH_DATA_LEN)) {
+	if (vsi->netdev && !I40E_2K_TOO_SMALL_WITH_PADDING &&
+	    vsi->netdev->mtu <= ETH_DATA_LEN)
 		vsi->max_frame = I40E_RXBUFFER_1536 - NET_IP_ALIGN;
-		vsi->rx_buf_len = I40E_RXBUFFER_1536 - NET_IP_ALIGN;
 #endif
-	} else {
-		vsi->max_frame = I40E_MAX_RXBUFFER;
-		vsi->rx_buf_len = (PAGE_SIZE < 8192) ? I40E_RXBUFFER_3072 :
-						       I40E_RXBUFFER_2048;
-	}
 
 	/* set up individual rings */
 	for (i = 0; i < vsi->num_queue_pairs && !err; i++)
@@ -4123,6 +4135,7 @@ static int i40e_vsi_request_irq_msix(struct i40e_vsi *vsi, char *basename)
 		}
 
 		/* register for affinity change notifications */
+		q_vector->irq_num = irq_num;
 		q_vector->affinity_notify.notify = i40e_irq_affinity_notify;
 		q_vector->affinity_notify.release = i40e_irq_affinity_release;
 		irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify);
@@ -12937,6 +12950,29 @@ static void i40e_clear_rss_lut(struct i40e_vsi *vsi)
 }
 
 /**
+ * i40e_set_loopback - turn on/off loopback mode on underlying PF
+ * @vsi: ptr to VSI
+ * @ena: flag to indicate the on/off setting
+ */
+static int i40e_set_loopback(struct i40e_vsi *vsi, bool ena)
+{
+	bool if_running = netif_running(vsi->netdev) &&
+			  !test_and_set_bit(__I40E_VSI_DOWN, vsi->state);
+	int ret;
+
+	if (if_running)
+		i40e_down(vsi);
+
+	ret = i40e_aq_set_mac_loopback(&vsi->back->hw, ena, NULL);
+	if (ret)
+		netdev_err(vsi->netdev, "Failed to toggle loopback state\n");
+	if (if_running)
+		i40e_up(vsi);
+
+	return ret;
+}
+
+/**
  * i40e_set_features - set the netdev feature flags
  * @netdev: ptr to the netdev being adjusted
  * @features: the feature set that the stack is suggesting
@@ -12976,6 +13012,9 @@ static int i40e_set_features(struct net_device *netdev,
 	if (need_reset)
 		i40e_do_reset(pf, I40E_PF_RESET_FLAG, true);
 
+	if ((features ^ netdev->features) & NETIF_F_LOOPBACK)
+		return i40e_set_loopback(vsi, !!(features & NETIF_F_LOOPBACK));
+
 	return 0;
 }
 
@@ -13282,7 +13321,7 @@ static int i40e_xdp_setup(struct i40e_vsi *vsi, struct bpf_prog *prog,
 	int i;
 
 	/* Don't allow frames that span over multiple buffers */
-	if (frame_size > vsi->rx_buf_len) {
+	if (frame_size > i40e_calculate_vsi_rx_buf_len(vsi)) {
 		NL_SET_ERR_MSG_MOD(extack, "MTU too large to enable XDP");
 		return -EINVAL;
 	}
@@ -13738,7 +13777,7 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
 	if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
 		hw_features |= NETIF_F_NTUPLE | NETIF_F_HW_TC;
 
-	netdev->hw_features |= hw_features;
+	netdev->hw_features |= hw_features | NETIF_F_LOOPBACK;
 
 	netdev->features |= hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
 	netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;