1 files changed, 69 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index dfd6c00b4205..96b2f2a37bc3 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -6515,6 +6515,13 @@ static int igc_tc_query_caps(struct igc_adapter *adapter,
 	struct igc_hw *hw = &adapter->hw;
 
 	switch (base->type) {
+	case TC_SETUP_QDISC_MQPRIO: {
+		struct tc_mqprio_caps *caps = base->caps;
+
+		caps->validate_queue_counts = true;
+
+		return 0;
+	}
 	case TC_SETUP_QDISC_TAPRIO: {
 		struct tc_taprio_caps *caps = base->caps;
 
@@ -6532,6 +6539,65 @@ static int igc_tc_query_caps(struct igc_adapter *adapter,
 	}
 }
 
+static void igc_save_mqprio_params(struct igc_adapter *adapter, u8 num_tc,
+				   u16 *offset)
+{
+	int i;
+
+	adapter->strict_priority_enable = true;
+	adapter->num_tc = num_tc;
+
+	for (i = 0; i < num_tc; i++)
+		adapter->queue_per_tc[i] = offset[i];
+}
+
+static int igc_tsn_enable_mqprio(struct igc_adapter *adapter,
+				 struct tc_mqprio_qopt_offload *mqprio)
+{
+	struct igc_hw *hw = &adapter->hw;
+	int i;
+
+	if (hw->mac.type != igc_i225)
+		return -EOPNOTSUPP;
+
+	if (!mqprio->qopt.num_tc) {
+		adapter->strict_priority_enable = false;
+		goto apply;
+	}
+
+	/* There are as many TCs as Tx queues. */
+	if (mqprio->qopt.num_tc != adapter->num_tx_queues) {
+		NL_SET_ERR_MSG_FMT_MOD(mqprio->extack,
+				       "Only %d traffic classes supported",
+				       adapter->num_tx_queues);
+		return -EOPNOTSUPP;
+	}
+
+	/* Only one queue per TC is supported. */
+	for (i = 0; i < mqprio->qopt.num_tc; i++) {
+		if (mqprio->qopt.count[i] != 1) {
+			NL_SET_ERR_MSG_MOD(mqprio->extack,
+					   "Only one queue per TC supported");
+			return -EOPNOTSUPP;
+		}
+	}
+
+	/* Preemption is not supported yet. */
+	if (mqprio->preemptible_tcs) {
+		NL_SET_ERR_MSG_MOD(mqprio->extack,
+				   "Preemption is not supported yet");
+		return -EOPNOTSUPP;
+	}
+
+	igc_save_mqprio_params(adapter, mqprio->qopt.num_tc,
+			       mqprio->qopt.offset);
+
+	mqprio->qopt.hw = TC_MQPRIO_HW_OFFLOAD_TCS;
+
+apply:
+	return igc_tsn_offload_apply(adapter);
+}
+
 static int igc_setup_tc(struct net_device *dev, enum tc_setup_type type,
 			void *type_data)
 {
@@ -6551,6 +6617,9 @@ static int igc_setup_tc(struct net_device *dev, enum tc_setup_type type,
 	case TC_SETUP_QDISC_CBS:
 		return igc_tsn_enable_cbs(adapter, type_data);
 
+	case TC_SETUP_QDISC_MQPRIO:
+		return igc_tsn_enable_mqprio(adapter, type_data);
+
 	default:
 		return -EOPNOTSUPP;
 	}