igc: Use default cycle 'start' and 'end' values for queues

Sets default values for each queue cycle start and cycle end.
This allows some simplification in the handling of these
configurations as most TSN features in i225 require a cycle
to be configured.

In i225, cycle start and end time is required to be programmed
for CBS to work properly.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: Aravindhan Gunasekaran <aravindhan.gunasekaran@intel.com>
Signed-off-by: Mallikarjuna Chilakala <mallikarjuna.chilakala@intel.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/igc/igc_main.c

@@ -5749,25 +5749,13 @@ static int igc_save_launchtime_params(struct igc_adapter *adapter, int queue,
 				      bool enable)
 {
 	struct igc_ring *ring;
-	int i;
 
 	if (queue < 0 || queue >= adapter->num_tx_queues)
 		return -EINVAL;
 
 	ring = adapter->tx_ring[queue];
 	ring->launchtime_enable = enable;
 
-	if (adapter->base_time)
-		return 0;
-
-	adapter->cycle_time = NSEC_PER_SEC;
-
-	for (i = 0; i < adapter->num_tx_queues; i++) {
-		ring = adapter->tx_ring[i];
-		ring->start_time = 0;
-		ring->end_time = NSEC_PER_SEC;
-	}
-
 	return 0;
 }
 
@@ -5840,16 +5828,31 @@ static int igc_tsn_enable_launchtime(struct igc_adapter *adapter,
 	return igc_tsn_offload_apply(adapter);
 }
 
+static int igc_tsn_clear_schedule(struct igc_adapter *adapter)
+{
+	int i;
+
+	adapter->base_time = 0;
+	adapter->cycle_time = NSEC_PER_SEC;
+
+	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;
+	}
+
+	return 0;
+}
+
 static int igc_save_qbv_schedule(struct igc_adapter *adapter,
 				 struct tc_taprio_qopt_offload *qopt)
 {
 	u32 start_time = 0, end_time = 0;
 	size_t n;
 
-	if (!qopt->enable) {
-		adapter->base_time = 0;
-		return 0;
-	}
+	if (!qopt->enable)
+		return igc_tsn_clear_schedule(adapter);
 
 	if (adapter->base_time)
 		return -EALREADY;
@@ -6339,6 +6342,8 @@ static int igc_probe(struct pci_dev *pdev,
 
 	igc_ptp_init(adapter);
 
+	igc_tsn_clear_schedule(adapter);
+
 	/* reset the hardware with the new settings */
 	igc_reset(adapter);
 

drivers/net/ethernet/intel/igc/igc_tsn.c

@@ -41,12 +41,6 @@ static int igc_tsn_disable_offload(struct igc_adapter *adapter)
 	wr32(IGC_TQAVCTRL, tqavctrl);
 
 	for (i = 0; i < adapter->num_tx_queues; i++) {
-		struct igc_ring *ring = adapter->tx_ring[i];
-
-		ring->start_time = 0;
-		ring->end_time = 0;
-		ring->launchtime_enable = false;
-
 		wr32(IGC_TXQCTL(i), 0);
 		wr32(IGC_STQT(i), 0);
 		wr32(IGC_ENDQT(i), NSEC_PER_SEC);