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>
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index c198183..9609673 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -4449,10 +4449,13 @@
/* 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);