1 files changed, 161 insertions, 45 deletions

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c b/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c
index e17a15456266..a9940154eead 100644
--- a/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c
@@ -296,93 +296,207 @@ static int i40evf_set_ringparam(struct net_device *netdev,
 }
 
 /**
- * i40evf_get_coalesce - Get interrupt coalescing settings
- * @netdev: network interface device structure
- * @ec: ethtool coalesce structure
+ * __i40evf_get_coalesce - get per-queue coalesce settings
+ * @netdev: the netdev to check
+ * @ec: ethtool coalesce data structure
+ * @queue: which queue to pick
  *
- * Returns current coalescing settings. This is referred to elsewhere in the
- * driver as Interrupt Throttle Rate, as this is how the hardware describes
- * this functionality.
+ * Gets the per-queue settings for coalescence. Specifically Rx and Tx usecs
+ * are per queue. If queue is <0 then we default to queue 0 as the
+ * representative value.
  **/
-static int i40evf_get_coalesce(struct net_device *netdev,
-			       struct ethtool_coalesce *ec)
+static int __i40evf_get_coalesce(struct net_device *netdev,
+				 struct ethtool_coalesce *ec,
+				 int queue)
 {
 	struct i40evf_adapter *adapter = netdev_priv(netdev);
 	struct i40e_vsi *vsi = &adapter->vsi;
+	struct i40e_ring *rx_ring, *tx_ring;
 
 	ec->tx_max_coalesced_frames = vsi->work_limit;
 	ec->rx_max_coalesced_frames = vsi->work_limit;
 
-	if (ITR_IS_DYNAMIC(vsi->rx_itr_setting))
+	/* Rx and Tx usecs per queue value. If user doesn't specify the
+	 * queue, return queue 0's value to represent.
+	 */
+	if (queue < 0)
+		queue = 0;
+	else if (queue >= adapter->num_active_queues)
+		return -EINVAL;
+
+	rx_ring = &adapter->rx_rings[queue];
+	tx_ring = &adapter->tx_rings[queue];
+
+	if (ITR_IS_DYNAMIC(rx_ring->rx_itr_setting))
 		ec->use_adaptive_rx_coalesce = 1;
 
-	if (ITR_IS_DYNAMIC(vsi->tx_itr_setting))
+	if (ITR_IS_DYNAMIC(tx_ring->tx_itr_setting))
 		ec->use_adaptive_tx_coalesce = 1;
 
-	ec->rx_coalesce_usecs = vsi->rx_itr_setting & ~I40E_ITR_DYNAMIC;
-	ec->tx_coalesce_usecs = vsi->tx_itr_setting & ~I40E_ITR_DYNAMIC;
+	ec->rx_coalesce_usecs = rx_ring->rx_itr_setting & ~I40E_ITR_DYNAMIC;
+	ec->tx_coalesce_usecs = tx_ring->tx_itr_setting & ~I40E_ITR_DYNAMIC;
 
 	return 0;
 }
 
 /**
- * i40evf_set_coalesce - Set interrupt coalescing settings
+ * i40evf_get_coalesce - Get interrupt coalescing settings
  * @netdev: network interface device structure
  * @ec: ethtool coalesce structure
  *
- * Change current coalescing settings.
+ * Returns current coalescing settings. This is referred to elsewhere in the
+ * driver as Interrupt Throttle Rate, as this is how the hardware describes
+ * this functionality. Note that if per-queue settings have been modified this
+ * only represents the settings of queue 0.
  **/
-static int i40evf_set_coalesce(struct net_device *netdev,
+static int i40evf_get_coalesce(struct net_device *netdev,
 			       struct ethtool_coalesce *ec)
 {
-	struct i40evf_adapter *adapter = netdev_priv(netdev);
-	struct i40e_hw *hw = &adapter->hw;
+	return __i40evf_get_coalesce(netdev, ec, -1);
+}
+
+/**
+ * i40evf_get_per_queue_coalesce - get coalesce values for specific queue
+ * @netdev: netdev to read
+ * @ec: coalesce settings from ethtool
+ * @queue: the queue to read
+ *
+ * Read specific queue's coalesce settings.
+ **/
+static int i40evf_get_per_queue_coalesce(struct net_device *netdev,
+					 u32 queue,
+					 struct ethtool_coalesce *ec)
+{
+	return __i40evf_get_coalesce(netdev, ec, queue);
+}
+
+/**
+ * i40evf_set_itr_per_queue - set ITR values for specific queue
+ * @vsi: the VSI to set values for
+ * @ec: coalesce settings from ethtool
+ * @queue: the queue to modify
+ *
+ * Change the ITR settings for a specific queue.
+ **/
+static void i40evf_set_itr_per_queue(struct i40evf_adapter *adapter,
+				     struct ethtool_coalesce *ec,
+				     int queue)
+{
 	struct i40e_vsi *vsi = &adapter->vsi;
+	struct i40e_hw *hw = &adapter->hw;
 	struct i40e_q_vector *q_vector;
+	u16 vector;
+
+	adapter->rx_rings[queue].rx_itr_setting = ec->rx_coalesce_usecs;
+	adapter->tx_rings[queue].tx_itr_setting = ec->tx_coalesce_usecs;
+
+	if (ec->use_adaptive_rx_coalesce)
+		adapter->rx_rings[queue].rx_itr_setting |= I40E_ITR_DYNAMIC;
+	else
+		adapter->rx_rings[queue].rx_itr_setting &= ~I40E_ITR_DYNAMIC;
+
+	if (ec->use_adaptive_tx_coalesce)
+		adapter->tx_rings[queue].tx_itr_setting |= I40E_ITR_DYNAMIC;
+	else
+		adapter->tx_rings[queue].tx_itr_setting &= ~I40E_ITR_DYNAMIC;
+
+	q_vector = adapter->rx_rings[queue].q_vector;
+	q_vector->rx.itr = ITR_TO_REG(adapter->rx_rings[queue].rx_itr_setting);
+	vector = vsi->base_vector + q_vector->v_idx;
+	wr32(hw, I40E_VFINT_ITRN1(I40E_RX_ITR, vector - 1), q_vector->rx.itr);
+
+	q_vector = adapter->tx_rings[queue].q_vector;
+	q_vector->tx.itr = ITR_TO_REG(adapter->tx_rings[queue].tx_itr_setting);
+	vector = vsi->base_vector + q_vector->v_idx;
+	wr32(hw, I40E_VFINT_ITRN1(I40E_TX_ITR, vector - 1), q_vector->tx.itr);
+
+	i40e_flush(hw);
+}
+
+/**
+ * __i40evf_set_coalesce - set coalesce settings for particular queue
+ * @netdev: the netdev to change
+ * @ec: ethtool coalesce settings
+ * @queue: the queue to change
+ *
+ * Sets the coalesce settings for a particular queue.
+ **/
+static int __i40evf_set_coalesce(struct net_device *netdev,
+				 struct ethtool_coalesce *ec,
+				 int queue)
+{
+	struct i40evf_adapter *adapter = netdev_priv(netdev);
+	struct i40e_vsi *vsi = &adapter->vsi;
 	int i;
 
 	if (ec->tx_max_coalesced_frames_irq || ec->rx_max_coalesced_frames_irq)
 		vsi->work_limit = ec->tx_max_coalesced_frames_irq;
 
-	if ((ec->rx_coalesce_usecs >= (I40E_MIN_ITR << 1)) &&
-	    (ec->rx_coalesce_usecs <= (I40E_MAX_ITR << 1)))
-		vsi->rx_itr_setting = ec->rx_coalesce_usecs;
-
-	else
+	if (ec->rx_coalesce_usecs == 0) {
+		if (ec->use_adaptive_rx_coalesce)
+			netif_info(adapter, drv, netdev, "rx-usecs=0, need to disable adaptive-rx for a complete disable\n");
+	} else if ((ec->rx_coalesce_usecs < (I40E_MIN_ITR << 1)) ||
+		   (ec->rx_coalesce_usecs > (I40E_MAX_ITR << 1))) {
+		netif_info(adapter, drv, netdev, "Invalid value, rx-usecs range is 0-8160\n");
 		return -EINVAL;
+	}
 
-	if ((ec->tx_coalesce_usecs >= (I40E_MIN_ITR << 1)) &&
-	    (ec->tx_coalesce_usecs <= (I40E_MAX_ITR << 1)))
-		vsi->tx_itr_setting = ec->tx_coalesce_usecs;
-	else if (ec->use_adaptive_tx_coalesce)
-		vsi->tx_itr_setting = (I40E_ITR_DYNAMIC |
-				       ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
 	else
+	if (ec->tx_coalesce_usecs == 0) {
+		if (ec->use_adaptive_tx_coalesce)
+			netif_info(adapter, drv, netdev, "tx-usecs=0, need to disable adaptive-tx for a complete disable\n");
+	} else if ((ec->tx_coalesce_usecs < (I40E_MIN_ITR << 1)) ||
+		   (ec->tx_coalesce_usecs > (I40E_MAX_ITR << 1))) {
+		netif_info(adapter, drv, netdev, "Invalid value, tx-usecs range is 0-8160\n");
 		return -EINVAL;
+	}
 
-	if (ec->use_adaptive_rx_coalesce)
-		vsi->rx_itr_setting |= I40E_ITR_DYNAMIC;
-	else
-		vsi->rx_itr_setting &= ~I40E_ITR_DYNAMIC;
-
-	if (ec->use_adaptive_tx_coalesce)
-		vsi->tx_itr_setting |= I40E_ITR_DYNAMIC;
-	else
-		vsi->tx_itr_setting &= ~I40E_ITR_DYNAMIC;
-
-	for (i = 0; i < adapter->num_msix_vectors - NONQ_VECS; i++) {
-		q_vector = &adapter->q_vectors[i];
-		q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
-		wr32(hw, I40E_VFINT_ITRN1(0, i), q_vector->rx.itr);
-		q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
-		wr32(hw, I40E_VFINT_ITRN1(1, i), q_vector->tx.itr);
-		i40e_flush(hw);
+	/* Rx and Tx usecs has per queue value. If user doesn't specify the
+	 * queue, apply to all queues.
+	 */
+	if (queue < 0) {
+		for (i = 0; i < adapter->num_active_queues; i++)
+			i40evf_set_itr_per_queue(adapter, ec, i);
+	} else if (queue < adapter->num_active_queues) {
+		i40evf_set_itr_per_queue(adapter, ec, queue);
+	} else {
+		netif_info(adapter, drv, netdev, "Invalid queue value, queue range is 0 - %d\n",
+			   adapter->num_active_queues - 1);
+		return -EINVAL;
 	}
 
 	return 0;
 }
 
 /**
+ * i40evf_set_coalesce - Set interrupt coalescing settings
+ * @netdev: network interface device structure
+ * @ec: ethtool coalesce structure
+ *
+ * Change current coalescing settings for every queue.
+ **/
+static int i40evf_set_coalesce(struct net_device *netdev,
+			       struct ethtool_coalesce *ec)
+{
+	return __i40evf_set_coalesce(netdev, ec, -1);
+}
+
+/**
+ * i40evf_set_per_queue_coalesce - set specific queue's coalesce settings
+ * @netdev: the netdev to change
+ * @ec: ethtool's coalesce settings
+ * @queue: the queue to modify
+ *
+ * Modifies a specific queue's coalesce settings.
+ */
+static int i40evf_set_per_queue_coalesce(struct net_device *netdev,
+					 u32 queue,
+					 struct ethtool_coalesce *ec)
+{
+	return __i40evf_set_coalesce(netdev, ec, queue);
+}
+
+/**
  * i40evf_get_rxnfc - command to get RX flow classification rules
  * @netdev: network interface device structure
  * @cmd: ethtool rxnfc command
@@ -533,6 +647,8 @@ static const struct ethtool_ops i40evf_ethtool_ops = {
 	.set_msglevel		= i40evf_set_msglevel,
 	.get_coalesce		= i40evf_get_coalesce,
 	.set_coalesce		= i40evf_set_coalesce,
+	.get_per_queue_coalesce = i40evf_get_per_queue_coalesce,
+	.set_per_queue_coalesce = i40evf_set_per_queue_coalesce,
 	.get_rxnfc		= i40evf_get_rxnfc,
 	.get_rxfh_indir_size	= i40evf_get_rxfh_indir_size,
 	.get_rxfh		= i40evf_get_rxfh,