ixgbe patch to provide NIC's tx/rx counters via ethtool

When LRO is enabled, the received packet and byte counters represent the
LRO'd packets, not the packets/bytes on the wire.  The Intel 82599 NIC has
registers that keep count of the physical packets.  Add these counters to
the ethtool stats.  The byte counters are 36-bit, but the high 4 bits were
being ignored in the 2.6.31 ixgbe driver:  Read those as well to allow
longer time between polling the stats to detect wraps.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 9 insertions, 2 deletions

diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index 53b0a668025..fa314cb005a 100644
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c
@@ -53,6 +53,10 @@ static struct ixgbe_stats ixgbe_gstrings_stats[] = {
         {"tx_packets", IXGBE_STAT(net_stats.tx_packets)},
         {"rx_bytes", IXGBE_STAT(net_stats.rx_bytes)},
         {"tx_bytes", IXGBE_STAT(net_stats.tx_bytes)},
+        {"rx_pkts_nic", IXGBE_STAT(stats.gprc)},
+        {"tx_pkts_nic", IXGBE_STAT(stats.gptc)},
+        {"rx_bytes_nic", IXGBE_STAT(stats.gorc)},
+        {"tx_bytes_nic", IXGBE_STAT(stats.gotc)},
         {"lsc_int", IXGBE_STAT(lsc_int)},
         {"tx_busy", IXGBE_STAT(tx_busy)},
         {"non_eop_descs", IXGBE_STAT(non_eop_descs)},
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index c1981830362..96096739920 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -4449,10 +4449,13 @@ void ixgbe_update_stats(struct ixgbe_adapter *adapter)
 
         /* 82598 hardware only has a 32 bit counter in the high register */
         if (hw->mac.type == ixgbe_mac_82599EB) {
+                u64 tmp;
                 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
-                IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
+                tmp = IXGBE_READ_REG(hw, IXGBE_GORCH) & 0xF; /* 4 high bits of GORC */
+                adapter->stats.gorc += (tmp << 32);
                 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
-                IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
+                tmp = IXGBE_READ_REG(hw, IXGBE_GOTCH) & 0xF; /* 4 high bits of GOTC */
+                adapter->stats.gotc += (tmp << 32);
                 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
                 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
                 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);