Merge branch '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2023-03-07 (igc)

This series contains updates to igc driver only.

Muhammad adds tracking and reporting of QBV config errors.

Tan Tee adds support for configuring max SDU for each Tx queue.

Sasha removes check for alternate media as only one media type is
supported.

* '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue:
  igc: Clean up and optimize watchdog task
  igc: offload queue max SDU from tc-taprio
  igc: Add qbv_config_change_errors counter
====================

Link: https://lore.kernel.org/r/20230307221332.3997881-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 30 insertions, 21 deletions

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index d7ee06d28b50..0a1570129e5b 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -1500,6 +1500,7 @@ static int igc_tso(struct igc_ring *tx_ring,
 static netdev_tx_t igc_xmit_frame_ring(struct sk_buff *skb,
 				       struct igc_ring *tx_ring)
 {
+	struct igc_adapter *adapter = netdev_priv(tx_ring->netdev);
 	bool first_flag = false, insert_empty = false;
 	u16 count = TXD_USE_COUNT(skb_headlen(skb));
 	__be16 protocol = vlan_get_protocol(skb);
@@ -1562,9 +1563,19 @@ done:
 	first->bytecount = skb->len;
 	first->gso_segs = 1;
 
-	if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
-		struct igc_adapter *adapter = netdev_priv(tx_ring->netdev);
+	if (tx_ring->max_sdu > 0) {
+		u32 max_sdu = 0;
+
+		max_sdu = tx_ring->max_sdu +
+			  (skb_vlan_tagged(first->skb) ? VLAN_HLEN : 0);
+
+		if (first->bytecount > max_sdu) {
+			adapter->stats.txdrop++;
+			goto out_drop;
+		}
+	}
 
+	if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
 		/* FIXME: add support for retrieving timestamps from
 		 * the other timer registers before skipping the
 		 * timestamping request.
@@ -4919,7 +4930,8 @@ void igc_update_stats(struct igc_adapter *adapter)
 	net_stats->tx_window_errors = adapter->stats.latecol;
 	net_stats->tx_carrier_errors = adapter->stats.tncrs;
 
-	/* Tx Dropped needs to be maintained elsewhere */
+	/* Tx Dropped */
+	net_stats->tx_dropped = adapter->stats.txdrop;
 
 	/* Management Stats */
 	adapter->stats.mgptc += rd32(IGC_MGTPTC);
@@ -5565,25 +5577,8 @@ no_wait:
 				mod_timer(&adapter->phy_info_timer,
 					  round_jiffies(jiffies + 2 * HZ));
 
-			/* link is down, time to check for alternate media */
-			if (adapter->flags & IGC_FLAG_MAS_ENABLE) {
-				if (adapter->flags & IGC_FLAG_MEDIA_RESET) {
-					schedule_work(&adapter->reset_task);
-					/* return immediately */
-					return;
-				}
-			}
 			pm_schedule_suspend(netdev->dev.parent,
 					    MSEC_PER_SEC * 5);
-
-		/* also check for alternate media here */
-		} else if (!netif_carrier_ok(netdev) &&
-			   (adapter->flags & IGC_FLAG_MAS_ENABLE)) {
-			if (adapter->flags & IGC_FLAG_MEDIA_RESET) {
-				schedule_work(&adapter->reset_task);
-				/* return immediately */
-				return;
-			}
 		}
 	}
 
@@ -6048,12 +6043,14 @@ static int igc_tsn_clear_schedule(struct igc_adapter *adapter)
 
 	adapter->base_time = 0;
 	adapter->cycle_time = NSEC_PER_SEC;
+	adapter->qbv_config_change_errors = 0;
 
 	for (i = 0; i < adapter->num_tx_queues; i++) {
 		struct igc_ring *ring = adapter->tx_ring[i];
 
 		ring->start_time = 0;
 		ring->end_time = NSEC_PER_SEC;
+		ring->max_sdu = 0;
 	}
 
 	return 0;
@@ -6137,6 +6134,16 @@ static int igc_save_qbv_schedule(struct igc_adapter *adapter,
 		}
 	}
 
+	for (i = 0; i < adapter->num_tx_queues; i++) {
+		struct igc_ring *ring = adapter->tx_ring[i];
+		struct net_device *dev = adapter->netdev;
+
+		if (qopt->max_sdu[i])
+			ring->max_sdu = qopt->max_sdu[i] + dev->hard_header_len;
+		else
+			ring->max_sdu = 0;
+	}
+
 	return 0;
 }
 
@@ -6235,8 +6242,10 @@ static int igc_tc_query_caps(struct igc_adapter *adapter,
 
 		caps->broken_mqprio = true;
 
-		if (hw->mac.type == igc_i225)
+		if (hw->mac.type == igc_i225) {
+			caps->supports_queue_max_sdu = true;
 			caps->gate_mask_per_txq = true;
+		}
 
 		return 0;
 	}