ixgbe: add ethtool counters for OS2BMC

OS2BMC registers are available for X540.
This patch adds ethtool counters based on those registers.
Signed-off-by: NEmil Tantilov <emil.s.tantilov@intel.com>
Tested-by: NEvan Swanson <evan.swanson@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ixgbe/ixgbe_ethtool.c

@@ -102,6 +102,10 @@ static struct ixgbe_stats ixgbe_gstrings_stats[] = {
 	{"alloc_rx_page_failed", IXGBE_STAT(alloc_rx_page_failed)},
 	{"alloc_rx_buff_failed", IXGBE_STAT(alloc_rx_buff_failed)},
 	{"rx_no_dma_resources", IXGBE_STAT(hw_rx_no_dma_resources)},
+	{"os2bmc_rx_by_bmc", IXGBE_STAT(stats.o2bgptc)},
+	{"os2bmc_tx_by_bmc", IXGBE_STAT(stats.b2ospc)},
+	{"os2bmc_tx_by_host", IXGBE_STAT(stats.o2bspc)},
+	{"os2bmc_rx_by_host", IXGBE_STAT(stats.b2ogprc)},
 #ifdef IXGBE_FCOE
 	{"fcoe_bad_fccrc", IXGBE_STAT(stats.fccrc)},
 	{"rx_fcoe_dropped", IXGBE_STAT(stats.fcoerpdc)},

drivers/net/ixgbe/ixgbe_main.c

@@ -5912,8 +5912,13 @@ void ixgbe_update_stats(struct ixgbe_adapter *adapter)
 		hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
 		hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
 		break;
-	case ixgbe_mac_82599EB:
 	case ixgbe_mac_X540:
+		/* OS2BMC stats are X540 only*/
+		hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
+		hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
+		hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
+		hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
+	case ixgbe_mac_82599EB:
 		hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
 		IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
 		hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);

drivers/net/ixgbe/ixgbe_type.h

@@ -672,6 +672,10 @@
 #define IXGBE_FCOEDWRC  0x0242C /* Number of FCoE DWords Received */
 #define IXGBE_FCOEPTC   0x08784 /* Number of FCoE Packets Transmitted */
 #define IXGBE_FCOEDWTC  0x08788 /* Number of FCoE DWords Transmitted */
+#define IXGBE_O2BGPTC   0x041C4
+#define IXGBE_O2BSPC    0x087B0
+#define IXGBE_B2OSPC    0x041C0
+#define IXGBE_B2OGPRC   0x02F90
 #define IXGBE_PCRC8ECL  0x0E810
 #define IXGBE_PCRC8ECH  0x0E811
 #define IXGBE_PCRC8ECH_MASK     0x1F
@@ -2554,6 +2558,10 @@ struct ixgbe_hw_stats {
 	u64 fcoeptc;
 	u64 fcoedwrc;
 	u64 fcoedwtc;
+	u64 b2ospc;
+	u64 b2ogprc;
+	u64 o2bgptc;
+	u64 o2bspc;
 };
 
 /* forward declaration */