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path: root/drivers/net/ixgbe/ixgbe_ethtool.c
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Diffstat (limited to 'drivers/net/ixgbe/ixgbe_ethtool.c')
-rw-r--r--drivers/net/ixgbe/ixgbe_ethtool.c86
1 files changed, 47 insertions, 39 deletions
diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index 2506f9eae58e..f18e3daaf4f5 100644
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c
@@ -880,17 +880,23 @@ static int ixgbe_get_coalesce(struct net_device *netdev,
880{ 880{
881 struct ixgbe_adapter *adapter = netdev_priv(netdev); 881 struct ixgbe_adapter *adapter = netdev_priv(netdev);
882 882
883 if (adapter->rx_eitr < IXGBE_MIN_ITR_USECS)
884 ec->rx_coalesce_usecs = adapter->rx_eitr;
885 else
886 ec->rx_coalesce_usecs = 1000000 / adapter->rx_eitr;
887
888 if (adapter->tx_eitr < IXGBE_MIN_ITR_USECS)
889 ec->tx_coalesce_usecs = adapter->tx_eitr;
890 else
891 ec->tx_coalesce_usecs = 1000000 / adapter->tx_eitr;
892
893 ec->tx_max_coalesced_frames_irq = adapter->tx_ring[0].work_limit; 883 ec->tx_max_coalesced_frames_irq = adapter->tx_ring[0].work_limit;
884
885 /* only valid if in constant ITR mode */
886 switch (adapter->itr_setting) {
887 case 0:
888 /* throttling disabled */
889 ec->rx_coalesce_usecs = 0;
890 break;
891 case 1:
892 /* dynamic ITR mode */
893 ec->rx_coalesce_usecs = 1;
894 break;
895 default:
896 /* fixed interrupt rate mode */
897 ec->rx_coalesce_usecs = 1000000/adapter->eitr_param;
898 break;
899 }
894 return 0; 900 return 0;
895} 901}
896 902
@@ -898,38 +904,40 @@ static int ixgbe_set_coalesce(struct net_device *netdev,
898 struct ethtool_coalesce *ec) 904 struct ethtool_coalesce *ec)
899{ 905{
900 struct ixgbe_adapter *adapter = netdev_priv(netdev); 906 struct ixgbe_adapter *adapter = netdev_priv(netdev);
901 907 struct ixgbe_hw *hw = &adapter->hw;
902 if ((ec->rx_coalesce_usecs > IXGBE_MAX_ITR_USECS) || 908 int i;
903 ((ec->rx_coalesce_usecs != 0) &&
904 (ec->rx_coalesce_usecs != 1) &&
905 (ec->rx_coalesce_usecs != 3) &&
906 (ec->rx_coalesce_usecs < IXGBE_MIN_ITR_USECS)))
907 return -EINVAL;
908 if ((ec->tx_coalesce_usecs > IXGBE_MAX_ITR_USECS) ||
909 ((ec->tx_coalesce_usecs != 0) &&
910 (ec->tx_coalesce_usecs != 1) &&
911 (ec->tx_coalesce_usecs != 3) &&
912 (ec->tx_coalesce_usecs < IXGBE_MIN_ITR_USECS)))
913 return -EINVAL;
914
915 /* convert to rate of irq's per second */
916 if (ec->rx_coalesce_usecs < IXGBE_MIN_ITR_USECS)
917 adapter->rx_eitr = ec->rx_coalesce_usecs;
918 else
919 adapter->rx_eitr = (1000000 / ec->rx_coalesce_usecs);
920
921 if (ec->tx_coalesce_usecs < IXGBE_MIN_ITR_USECS)
922 adapter->tx_eitr = ec->rx_coalesce_usecs;
923 else
924 adapter->tx_eitr = (1000000 / ec->tx_coalesce_usecs);
925 909
926 if (ec->tx_max_coalesced_frames_irq) 910 if (ec->tx_max_coalesced_frames_irq)
927 adapter->tx_ring[0].work_limit = 911 adapter->tx_ring[0].work_limit = ec->tx_max_coalesced_frames_irq;
928 ec->tx_max_coalesced_frames_irq; 912
913 if (ec->rx_coalesce_usecs > 1) {
914 /* store the value in ints/second */
915 adapter->eitr_param = 1000000/ec->rx_coalesce_usecs;
916
917 /* static value of interrupt rate */
918 adapter->itr_setting = adapter->eitr_param;
919 /* clear the lower bit */
920 adapter->itr_setting &= ~1;
921 } else if (ec->rx_coalesce_usecs == 1) {
922 /* 1 means dynamic mode */
923 adapter->eitr_param = 20000;
924 adapter->itr_setting = 1;
925 } else {
926 /* any other value means disable eitr, which is best
927 * served by setting the interrupt rate very high */
928 adapter->eitr_param = 3000000;
929 adapter->itr_setting = 0;
930 }
929 931
930 if (netif_running(netdev)) { 932 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
931 ixgbe_down(adapter); 933 struct ixgbe_q_vector *q_vector = &adapter->q_vector[i];
932 ixgbe_up(adapter); 934 if (q_vector->txr_count && !q_vector->rxr_count)
935 q_vector->eitr = (adapter->eitr_param >> 1);
936 else
937 /* rx only or mixed */
938 q_vector->eitr = adapter->eitr_param;
939 IXGBE_WRITE_REG(hw, IXGBE_EITR(i),
940 EITR_INTS_PER_SEC_TO_REG(q_vector->eitr));
933 } 941 }
934 942
935 return 0; 943 return 0;