netdev - [PATCH net-next v3 6/8] ixgbe: add pause frame stats

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Date:   Mon, 14 Sep 2020 17:11:57 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     davem@...emloft.net
Cc:     mkubecek@...e.cz, michael.chan@...adcom.com, saeedm@...dia.com,
        tariqt@...dia.com, andrew@...n.ch, alexander.duyck@...il.com,
        netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        Alexander Duyck <alexander.h.duyck@...ux.intel.com>
Subject: [PATCH net-next v3 6/8] ixgbe: add pause frame stats

Report standard pause frame stats. They are already aggregated
in struct ixgbe_hw_stats.

The combination of the registers is suggested as equivalent to
PAUSEMACCtrlFramesTransmitted / PAUSEMACCtrlFramesReceived
by the Intel 82576EB datasheet, I could not find any information
in the HW actually supported by ixgbe.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Reviewed-by: Alexander Duyck <alexander.h.duyck@...ux.intel.com>
Reviewed-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
index 71ec908266a6..a280aa34ca1d 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
@@ -531,6 +531,16 @@ static int ixgbe_set_link_ksettings(struct net_device *netdev,
 	return err;
 }
 
+static void ixgbe_get_pause_stats(struct net_device *netdev,
+				  struct ethtool_pause_stats *stats)
+{
+	struct ixgbe_adapter *adapter = netdev_priv(netdev);
+	struct ixgbe_hw_stats *hwstats = &adapter->stats;
+
+	stats->tx_pause_frames = hwstats->lxontxc + hwstats->lxofftxc;
+	stats->rx_pause_frames = hwstats->lxonrxc + hwstats->lxoffrxc;
+}
+
 static void ixgbe_get_pauseparam(struct net_device *netdev,
 				 struct ethtool_pauseparam *pause)
 {
@@ -3546,6 +3556,7 @@ static const struct ethtool_ops ixgbe_ethtool_ops = {
 	.set_eeprom             = ixgbe_set_eeprom,
 	.get_ringparam          = ixgbe_get_ringparam,
 	.set_ringparam          = ixgbe_set_ringparam,
+	.get_pause_stats	= ixgbe_get_pause_stats,
 	.get_pauseparam         = ixgbe_get_pauseparam,
 	.set_pauseparam         = ixgbe_set_pauseparam,
 	.get_msglevel           = ixgbe_get_msglevel,
-- 
2.26.2