Merge branch 'ena-set_channels'

Sameeh Jubran says:

====================
ena: Support ethtool set_channels

Difference from v2:
* ethtool's set/get channels: Switched to using combined instead of
  separate rx/tx
* Fixed error handling in set_channels
* Fixed indentation and cosmetic issues as requested by Jakub Kicinski

Difference from v1:
* Dropped the print from patch 0002 - "net: ena: multiple queue creation
  related cleanups" as requested by David Miller
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/amazon/ena/ena_ethtool.c

@@ -133,7 +133,7 @@ static void ena_queue_stats(struct ena_adapter *adapter, u64 **data)
 	u64 *ptr;
 	int i, j;
 
-	for (i = 0; i < adapter->num_queues; i++) {
+	for (i = 0; i < adapter->num_io_queues; i++) {
 		/* Tx stats */
 		ring = &adapter->tx_ring[i];
 
@@ -205,7 +205,7 @@ int ena_get_sset_count(struct net_device *netdev, int sset)
 	if (sset != ETH_SS_STATS)
 		return -EOPNOTSUPP;
 
-	return  adapter->num_queues * (ENA_STATS_ARRAY_TX + ENA_STATS_ARRAY_RX)
+	return  adapter->num_io_queues * (ENA_STATS_ARRAY_TX + ENA_STATS_ARRAY_RX)
 		+ ENA_STATS_ARRAY_GLOBAL + ENA_STATS_ARRAY_ENA_COM;
 }
 
@@ -214,7 +214,7 @@ static void ena_queue_strings(struct ena_adapter *adapter, u8 **data)
 	const struct ena_stats *ena_stats;
 	int i, j;
 
-	for (i = 0; i < adapter->num_queues; i++) {
+	for (i = 0; i < adapter->num_io_queues; i++) {
 		/* Tx stats */
 		for (j = 0; j < ENA_STATS_ARRAY_TX; j++) {
 			ena_stats = &ena_stats_tx_strings[j];
@@ -333,7 +333,7 @@ static void ena_update_tx_rings_intr_moderation(struct ena_adapter *adapter)
 
 	val = ena_com_get_nonadaptive_moderation_interval_tx(adapter->ena_dev);
 
-	for (i = 0; i < adapter->num_queues; i++)
+	for (i = 0; i < adapter->num_io_queues; i++)
 		adapter->tx_ring[i].smoothed_interval = val;
 }
 
@@ -344,7 +344,7 @@ static void ena_update_rx_rings_intr_moderation(struct ena_adapter *adapter)
 
 	val = ena_com_get_nonadaptive_moderation_interval_rx(adapter->ena_dev);
 
-	for (i = 0; i < adapter->num_queues; i++)
+	for (i = 0; i < adapter->num_io_queues; i++)
 		adapter->rx_ring[i].smoothed_interval = val;
 }
 
@@ -612,7 +612,7 @@ static int ena_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *info,
 
 	switch (info->cmd) {
 	case ETHTOOL_GRXRINGS:
-		info->data = adapter->num_queues;
+		info->data = adapter->num_io_queues;
 		rc = 0;
 		break;
 	case ETHTOOL_GRXFH:
@@ -734,14 +734,20 @@ static void ena_get_channels(struct net_device *netdev,
 {
 	struct ena_adapter *adapter = netdev_priv(netdev);
 
-	channels->max_rx = adapter->num_queues;
-	channels->max_tx = adapter->num_queues;
-	channels->max_other = 0;
-	channels->max_combined = 0;
-	channels->rx_count = adapter->num_queues;
-	channels->tx_count = adapter->num_queues;
-	channels->other_count = 0;
-	channels->combined_count = 0;
+	channels->max_combined = adapter->max_num_io_queues;
+	channels->combined_count = adapter->num_io_queues;
+}
+
+static int ena_set_channels(struct net_device *netdev,
+			    struct ethtool_channels *channels)
+{
+	struct ena_adapter *adapter = netdev_priv(netdev);
+	u32 count = channels->combined_count;
+	/* The check for max value is already done in ethtool */
+	if (count < ENA_MIN_NUM_IO_QUEUES)
+		return -EINVAL;
+
+	return ena_update_queue_count(adapter, count);
 }
 
 static int ena_get_tunable(struct net_device *netdev,
@@ -807,6 +813,7 @@ static const struct ethtool_ops ena_ethtool_ops = {
 	.get_rxfh		= ena_get_rxfh,
 	.set_rxfh		= ena_set_rxfh,
 	.get_channels		= ena_get_channels,
+	.set_channels		= ena_set_channels,
 	.get_tunable		= ena_get_tunable,
 	.set_tunable		= ena_set_tunable,
 };

drivers/net/ethernet/amazon/ena/ena_netdev.h

@@ -82,6 +82,8 @@
 #define ENA_DEFAULT_RING_SIZE	(1024)
 #define ENA_MIN_RING_SIZE	(256)
 
+#define ENA_MIN_NUM_IO_QUEUES	(1)
+
 #define ENA_TX_WAKEUP_THRESH		(MAX_SKB_FRAGS + 2)
 #define ENA_DEFAULT_RX_COPYBREAK	(256 - NET_IP_ALIGN)
 
@@ -161,10 +163,10 @@ struct ena_calc_queue_size_ctx {
 	struct ena_com_dev_get_features_ctx *get_feat_ctx;
 	struct ena_com_dev *ena_dev;
 	struct pci_dev *pdev;
-	u16 tx_queue_size;
-	u16 rx_queue_size;
-	u16 max_tx_queue_size;
-	u16 max_rx_queue_size;
+	u32 tx_queue_size;
+	u32 rx_queue_size;
+	u32 max_tx_queue_size;
+	u32 max_rx_queue_size;
 	u16 max_tx_sgl_size;
 	u16 max_rx_sgl_size;
 };
@@ -324,7 +326,8 @@ struct ena_adapter {
 	u32 rx_copybreak;
 	u32 max_mtu;
 
-	int num_queues;
+	u32 num_io_queues;
+	u32 max_num_io_queues;
 
 	int msix_vecs;
 
@@ -387,6 +390,7 @@ void ena_dump_stats_to_buf(struct ena_adapter *adapter, u8 *buf);
 int ena_update_queue_sizes(struct ena_adapter *adapter,
 			   u32 new_tx_size,
 			   u32 new_rx_size);
+int ena_update_queue_count(struct ena_adapter *adapter, u32 new_channel_count);
 
 int ena_get_sset_count(struct net_device *netdev, int sset);