ixgbe: send MFLCN to ethtool

MFLCN register is used to set Rx flow control on parts newer than 82598.

This patch sends the value of MFLCN to ethtool, so it can be used in a
register dump (ethtool -d).

(cherry picked from commit 217995ecd04999284ba4c5745e789314ea99e54f)
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Joe Jin <joe.jin@oracle.com>

diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index 9296144a569e57585bfe5424e868acbd4a8cff97..d8dcd9635472ed0b290a1bb531a2449ec93571c0 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c
@@ -459,7 +459,7 @@ static void ixgbe_set_msglevel(struct net_device *netdev, u32 data)
 
 static int ixgbe_get_regs_len(struct net_device *netdev)
 {
-#define IXGBE_REGS_LEN  1128
+#define IXGBE_REGS_LEN  1129
        return IXGBE_REGS_LEN * sizeof(u32);
 }
 
@@ -770,6 +770,9 @@ static void ixgbe_get_regs(struct net_device *netdev,
        regs_buff[1125] = IXGBE_READ_REG(hw, IXGBE_PCIEECCCTL);
        regs_buff[1126] = IXGBE_READ_REG(hw, IXGBE_PBTXECC);
        regs_buff[1127] = IXGBE_READ_REG(hw, IXGBE_PBRXECC);
+
+       /* 82599 X540 specific registers  */
+       regs_buff[1128] = IXGBE_READ_REG(hw, IXGBE_MFLCN);
 }
 
 static int ixgbe_get_eeprom_len(struct net_device *netdev)