ixgbe: add LRO support

Support for in-kernel LRO with the ability to enable/disable via ethtool
based on comments from Ben Hutchings.

Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: PJ Waskiewicz <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index 4e463778bcfd..12990b1fe7e4 100644
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c
@@ -90,6 +90,8 @@ static struct ixgbe_stats ixgbe_gstrings_stats[] = {
         {"rx_header_split", IXGBE_STAT(rx_hdr_split)},
         {"alloc_rx_page_failed", IXGBE_STAT(alloc_rx_page_failed)},
         {"alloc_rx_buff_failed", IXGBE_STAT(alloc_rx_buff_failed)},
+        {"lro_aggregated", IXGBE_STAT(lro_aggregated)},
+        {"lro_flushed", IXGBE_STAT(lro_flushed)},
 };
 
 #define IXGBE_QUEUE_STATS_LEN \
@@ -787,6 +789,7 @@ static void ixgbe_get_ethtool_stats(struct net_device *netdev,
         int stat_count = sizeof(struct ixgbe_queue_stats) / sizeof(u64);
         int j, k;
         int i;
+        u64 aggregated = 0, flushed = 0, no_desc = 0;
 
         ixgbe_update_stats(adapter);
         for (i = 0; i < IXGBE_GLOBAL_STATS_LEN; i++) {
@@ -801,11 +804,17 @@ static void ixgbe_get_ethtool_stats(struct net_device *netdev,
                 i += k;
         }
         for (j = 0; j < adapter->num_rx_queues; j++) {
+                aggregated += adapter->rx_ring[j].lro_mgr.stats.aggregated;
+                flushed += adapter->rx_ring[j].lro_mgr.stats.flushed;
+                no_desc += adapter->rx_ring[j].lro_mgr.stats.no_desc;
                 queue_stat = (u64 *)&adapter->rx_ring[j].stats;
                 for (k = 0; k < stat_count; k++)
                         data[i + k] = queue_stat[k];
                 i += k;
         }
+        adapter->lro_aggregated = aggregated;
+        adapter->lro_flushed = flushed;
+        adapter->lro_no_desc = no_desc;
 }
 
 static void ixgbe_get_strings(struct net_device *netdev, u32 stringset,
@@ -973,6 +982,8 @@ static struct ethtool_ops ixgbe_ethtool_ops = {
         .get_ethtool_stats      = ixgbe_get_ethtool_stats,
         .get_coalesce           = ixgbe_get_coalesce,
         .set_coalesce           = ixgbe_set_coalesce,
+        .get_flags              = ethtool_op_get_flags,
+        .set_flags              = ethtool_op_set_flags,
 };
 
 void ixgbe_set_ethtool_ops(struct net_device *netdev)