2 files changed, 46 insertions, 0 deletions

diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h
index 4d3d1c2991c9..79a426feffb7 100644
--- a/drivers/net/e1000e/e1000.h
+++ b/drivers/net/e1000e/e1000.h
@@ -70,6 +70,9 @@ struct e1000_info;
 #define E1000_MAX_RXD                   4096
 #define E1000_MIN_RXD                   80
 
+#define E1000_MIN_ITR_USECS             10 /* 100000 irq/sec */
+#define E1000_MAX_ITR_USECS             10000 /* 100    irq/sec */
+
 /* Early Receive defines */
 #define E1000_ERT_2048                  0x100
 
diff --git a/drivers/net/e1000e/ethtool.c b/drivers/net/e1000e/ethtool.c
index c894a6f03bb4..ce045acce63e 100644
--- a/drivers/net/e1000e/ethtool.c
+++ b/drivers/net/e1000e/ethtool.c
@@ -1770,6 +1770,47 @@ static int e1000_phys_id(struct net_device *netdev, u32 data)
         return 0;
 }
 
+static int e1000_get_coalesce(struct net_device *netdev,
+                              struct ethtool_coalesce *ec)
+{
+        struct e1000_adapter *adapter = netdev_priv(netdev);
+
+        if (adapter->itr_setting <= 3)
+                ec->rx_coalesce_usecs = adapter->itr_setting;
+        else
+                ec->rx_coalesce_usecs = 1000000 / adapter->itr_setting;
+
+        return 0;
+}
+
+static int e1000_set_coalesce(struct net_device *netdev,
+                              struct ethtool_coalesce *ec)
+{
+        struct e1000_adapter *adapter = netdev_priv(netdev);
+        struct e1000_hw *hw = &adapter->hw;
+
+        if ((ec->rx_coalesce_usecs > E1000_MAX_ITR_USECS) ||
+            ((ec->rx_coalesce_usecs > 3) &&
+             (ec->rx_coalesce_usecs < E1000_MIN_ITR_USECS)) ||
+            (ec->rx_coalesce_usecs == 2))
+                return -EINVAL;
+
+        if (ec->rx_coalesce_usecs <= 3) {
+                adapter->itr = 20000;
+                adapter->itr_setting = ec->rx_coalesce_usecs;
+        } else {
+                adapter->itr = (1000000 / ec->rx_coalesce_usecs);
+                adapter->itr_setting = adapter->itr & ~3;
+        }
+
+        if (adapter->itr_setting != 0)
+                ew32(ITR, 1000000000 / (adapter->itr * 256));
+        else
+                ew32(ITR, 0);
+
+        return 0;
+}
+
 static int e1000_nway_reset(struct net_device *netdev)
 {
         struct e1000_adapter *adapter = netdev_priv(netdev);
@@ -1845,6 +1886,8 @@ static const struct ethtool_ops e1000_ethtool_ops = {
         .phys_id                = e1000_phys_id,
         .get_ethtool_stats      = e1000_get_ethtool_stats,
         .get_sset_count         = e1000e_get_sset_count,
+        .get_coalesce           = e1000_get_coalesce,
+        .set_coalesce           = e1000_set_coalesce,
 };
 
 void e1000e_set_ethtool_ops(struct net_device *netdev)