igc: Add LPI counters

Add EEE TX LPI and EEE RX LPI counters. A EEE TX LPI event
occurs when the transmitter enters EEE (IEEE 802.3az) LPI
state. A EEE RX LPI event occurs when the receiver detect
link partner entry into EEE(IEEE 802.3az) LPI state.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/igc/igc_mac.c b/drivers/net/ethernet/intel/igc/igc_mac.c
index bc077f2..f3f7717 100644 (file)
--- a/drivers/net/ethernet/intel/igc/igc_mac.c
+++ b/drivers/net/ethernet/intel/igc/igc_mac.c
@@ -307,6 +307,8 @@ void igc_clear_hw_cntrs_base(struct igc_hw *hw)
        rd32(IGC_ICRXDMTC);
 
        rd32(IGC_RPTHC);
+       rd32(IGC_TLPIC);
+       rd32(IGC_RLPIC);
        rd32(IGC_HGPTC);
        rd32(IGC_HGORCL);
        rd32(IGC_HGORCH);

diff --git a/drivers/net/ethernet/intel/igc/igc_regs.h b/drivers/net/ethernet/intel/igc/igc_regs.h
index d53f498..eb3e8e7 100644 (file)
--- a/drivers/net/ethernet/intel/igc/igc_regs.h
+++ b/drivers/net/ethernet/intel/igc/igc_regs.h
@@ -188,6 +188,8 @@
 #define IGC_ICTXQEC    0x04118  /* Interrupt Cause Tx Queue Empty Count */
 #define IGC_ICTXQMTC   0x0411C  /* Interrupt Cause Tx Queue Min Thresh Count */
 #define IGC_RPTHC      0x04104  /* Rx Packets To Host */
+#define IGC_TLPIC      0x04148  /* EEE Tx LPI Count */
+#define IGC_RLPIC      0x0414C  /* EEE Rx LPI Count */
 #define IGC_HGPTC      0x04118  /* Host Good Packets Tx Count */
 #define IGC_RXDMTC     0x04120  /* Rx Descriptor Minimum Threshold Count */
 #define IGC_HGORCL     0x04128  /* Host Good Octets Received Count Low */