3 files changed, 38 insertions, 10 deletions

diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h
index 154c5acc6fce..b2c98dea9eed 100644
--- a/drivers/net/igb/igb.h
+++ b/drivers/net/igb/igb.h
@@ -137,11 +137,17 @@ struct igb_buffer {
         };
 };
 
-struct igb_queue_stats {
+struct igb_tx_queue_stats {
         u64 packets;
         u64 bytes;
 };
 
+struct igb_rx_queue_stats {
+        u64 packets;
+        u64 bytes;
+        u64 drops;
+};
+
 struct igb_ring {
         struct igb_adapter *adapter; /* backlink */
         void *desc;                  /* descriptor ring memory */
@@ -167,12 +173,13 @@ struct igb_ring {
         union {
                 /* TX */
                 struct {
-                        struct igb_queue_stats tx_stats;
+                        struct igb_tx_queue_stats tx_stats;
                         bool detect_tx_hung;
                 };
                 /* RX */
                 struct {
-                        struct igb_queue_stats rx_stats;
+                        struct igb_rx_queue_stats rx_stats;
+                        u64 rx_queue_drops;
                         struct napi_struct napi;
                         int set_itr;
                         struct igb_ring *buddy;
diff --git a/drivers/net/igb/igb_ethtool.c b/drivers/net/igb/igb_ethtool.c
index b8551a57dd3f..2ae98f91372e 100644
--- a/drivers/net/igb/igb_ethtool.c
+++ b/drivers/net/igb/igb_ethtool.c
@@ -96,9 +96,10 @@ static const struct igb_stats igb_gstrings_stats[] = {
 };
 
 #define IGB_QUEUE_STATS_LEN \
-        ((((struct igb_adapter *)netdev_priv(netdev))->num_rx_queues + \
-         ((struct igb_adapter *)netdev_priv(netdev))->num_tx_queues) * \
-        (sizeof(struct igb_queue_stats) / sizeof(u64)))
+        (((((struct igb_adapter *)netdev_priv(netdev))->num_rx_queues)* \
+          (sizeof(struct igb_rx_queue_stats) / sizeof(u64))) + \
+         ((((struct igb_adapter *)netdev_priv(netdev))->num_tx_queues) * \
+          (sizeof(struct igb_tx_queue_stats) / sizeof(u64))))
 #define IGB_GLOBAL_STATS_LEN    \
         sizeof(igb_gstrings_stats) / sizeof(struct igb_stats)
 #define IGB_STATS_LEN (IGB_GLOBAL_STATS_LEN + IGB_QUEUE_STATS_LEN)
@@ -1960,7 +1961,8 @@ static void igb_get_ethtool_stats(struct net_device *netdev,
 {
         struct igb_adapter *adapter = netdev_priv(netdev);
         u64 *queue_stat;
-        int stat_count = sizeof(struct igb_queue_stats) / sizeof(u64);
+        int stat_count_tx = sizeof(struct igb_tx_queue_stats) / sizeof(u64);
+        int stat_count_rx = sizeof(struct igb_rx_queue_stats) / sizeof(u64);
         int j;
         int i;
 
@@ -1973,14 +1975,14 @@ static void igb_get_ethtool_stats(struct net_device *netdev,
         for (j = 0; j < adapter->num_tx_queues; j++) {
                 int k;
                 queue_stat = (u64 *)&adapter->tx_ring[j].tx_stats;
-                for (k = 0; k < stat_count; k++)
+                for (k = 0; k < stat_count_tx; k++)
                         data[i + k] = queue_stat[k];
                 i += k;
         }
         for (j = 0; j < adapter->num_rx_queues; j++) {
                 int k;
                 queue_stat = (u64 *)&adapter->rx_ring[j].rx_stats;
-                for (k = 0; k < stat_count; k++)
+                for (k = 0; k < stat_count_rx; k++)
                         data[i + k] = queue_stat[k];
                 i += k;
         }
@@ -2014,6 +2016,8 @@ static void igb_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
                         p += ETH_GSTRING_LEN;
                         sprintf(p, "rx_queue_%u_bytes", i);
                         p += ETH_GSTRING_LEN;
+                        sprintf(p, "rx_queue_%u_drops", i);
+                        p += ETH_GSTRING_LEN;
                 }
 /*              BUG_ON(p - data != IGB_STATS_LEN * ETH_GSTRING_LEN); */
                 break;
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 2ec98091948b..4ae81331dca5 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -3588,8 +3588,25 @@ void igb_update_stats(struct igb_adapter *adapter)
 
         /* Rx Errors */
 
+        if (hw->mac.type != e1000_82575) {
+                u32 rqdpc_tmp;
+                int i;
+                /* Read out drops stats per RX queue.  Notice RQDPC (Receive
+                 * Queue Drop Packet Count) stats only gets incremented, if
+                 * the DROP_EN but it set (in the SRRCTL register for that
+                 * queue).  If DROP_EN bit is NOT set, then the some what
+                 * equivalent count is stored in RNBC (not per queue basis).
+                 * Also note the drop count is due to lack of available
+                 * descriptors.
+                 */
+                for (i = 0; i < adapter->num_rx_queues; i++) {
+                        rqdpc_tmp = rd32(E1000_RQDPC(i)) & 0xFFF;
+                        adapter->rx_ring[i].rx_stats.drops += rqdpc_tmp;
+                }
+        }
+
         /* RLEC on some newer hardware can be incorrect so build
-        * our own version based on RUC and ROC */
+         * our own version based on RUC and ROC */
         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
                 adapter->stats.crcerrs + adapter->stats.algnerrc +
                 adapter->stats.ruc + adapter->stats.roc +