net: enetc: add support for MAC Merge statistics counters

Add PF driver support for the following:

- Viewing the standardized MAC Merge layer counters.

- Viewing the standardized Ethernet MAC and RMON counters associated
  with the pMAC.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20230206094531.444988-2-vladimir.oltean@nxp.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/freescale/enetc/enetc_ethtool.c

 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
 /* Copyright 2017-2019 NXP */
 
+#include <linux/ethtool_netlink.h>
 #include <linux/net_tstamp.h>
 #include <linux/module.h>
 #include "enetc.h"
@@ -299,14 +300,32 @@ static void enetc_get_ethtool_stats(struct net_device *ndev,
 		data[o++] = enetc_port_rd(hw, enetc_port_counters[i].reg);
 }
 
+static void enetc_pause_stats(struct enetc_hw *hw, int mac,
+			      struct ethtool_pause_stats *pause_stats)
+{
+	pause_stats->tx_pause_frames = enetc_port_rd(hw, ENETC_PM_TXPF(mac));
+	pause_stats->rx_pause_frames = enetc_port_rd(hw, ENETC_PM_RXPF(mac));
+}
+
 static void enetc_get_pause_stats(struct net_device *ndev,
 				  struct ethtool_pause_stats *pause_stats)
 {
 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
 	struct enetc_hw *hw = &priv->si->hw;
+	struct enetc_si *si = priv->si;
 
-	pause_stats->tx_pause_frames = enetc_port_rd(hw, ENETC_PM_TXPF(0));
-	pause_stats->rx_pause_frames = enetc_port_rd(hw, ENETC_PM_RXPF(0));
+	switch (pause_stats->src) {
+	case ETHTOOL_MAC_STATS_SRC_EMAC:
+		enetc_pause_stats(hw, 0, pause_stats);
+		break;
+	case ETHTOOL_MAC_STATS_SRC_PMAC:
+		if (si->hw_features & ENETC_SI_F_QBU)
+			enetc_pause_stats(hw, 1, pause_stats);
+		break;
+	case ETHTOOL_MAC_STATS_SRC_AGGREGATE:
+		ethtool_aggregate_pause_stats(ndev, pause_stats);
+		break;
+	}
 }
 
 static void enetc_mac_stats(struct enetc_hw *hw, int mac,
@@ -383,8 +402,20 @@ static void enetc_get_eth_mac_stats(struct net_device *ndev,
 {
 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
 	struct enetc_hw *hw = &priv->si->hw;
+	struct enetc_si *si = priv->si;
 
+	switch (mac_stats->src) {
+	case ETHTOOL_MAC_STATS_SRC_EMAC:
 		enetc_mac_stats(hw, 0, mac_stats);
+		break;
+	case ETHTOOL_MAC_STATS_SRC_PMAC:
+		if (si->hw_features & ENETC_SI_F_QBU)
+			enetc_mac_stats(hw, 1, mac_stats);
+		break;
+	case ETHTOOL_MAC_STATS_SRC_AGGREGATE:
+		ethtool_aggregate_mac_stats(ndev, mac_stats);
+		break;
+	}
 }
 
 static void enetc_get_eth_ctrl_stats(struct net_device *ndev,
@@ -392,8 +423,20 @@ static void enetc_get_eth_ctrl_stats(struct net_device *ndev,
 {
 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
 	struct enetc_hw *hw = &priv->si->hw;
+	struct enetc_si *si = priv->si;
 
+	switch (ctrl_stats->src) {
+	case ETHTOOL_MAC_STATS_SRC_EMAC:
 		enetc_ctrl_stats(hw, 0, ctrl_stats);
+		break;
+	case ETHTOOL_MAC_STATS_SRC_PMAC:
+		if (si->hw_features & ENETC_SI_F_QBU)
+			enetc_ctrl_stats(hw, 1, ctrl_stats);
+		break;
+	case ETHTOOL_MAC_STATS_SRC_AGGREGATE:
+		ethtool_aggregate_ctrl_stats(ndev, ctrl_stats);
+		break;
+	}
 }
 
 static void enetc_get_rmon_stats(struct net_device *ndev,
@@ -402,8 +445,20 @@ static void enetc_get_rmon_stats(struct net_device *ndev,
 {
 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
 	struct enetc_hw *hw = &priv->si->hw;
+	struct enetc_si *si = priv->si;
 
+	switch (rmon_stats->src) {
+	case ETHTOOL_MAC_STATS_SRC_EMAC:
 		enetc_rmon_stats(hw, 0, rmon_stats, ranges);
+		break;
+	case ETHTOOL_MAC_STATS_SRC_PMAC:
+		if (si->hw_features & ENETC_SI_F_QBU)
+			enetc_rmon_stats(hw, 1, rmon_stats, ranges);
+		break;
+	case ETHTOOL_MAC_STATS_SRC_AGGREGATE:
+		ethtool_aggregate_rmon_stats(ndev, rmon_stats);
+		break;
+	}
 }
 
 #define ENETC_RSSHASH_L3 (RXH_L2DA | RXH_VLAN | RXH_L3_PROTO | RXH_IP_SRC | \
@@ -863,6 +918,24 @@ static int enetc_set_link_ksettings(struct net_device *dev,
 	return phylink_ethtool_ksettings_set(priv->phylink, cmd);
 }
 
+static void enetc_get_mm_stats(struct net_device *ndev,
+			       struct ethtool_mm_stats *s)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	struct enetc_hw *hw = &priv->si->hw;
+	struct enetc_si *si = priv->si;
+
+	if (!(si->hw_features & ENETC_SI_F_QBU))
+		return;
+
+	s->MACMergeFrameAssErrorCount = enetc_port_rd(hw, ENETC_MMFAECR);
+	s->MACMergeFrameSmdErrorCount = enetc_port_rd(hw, ENETC_MMFSECR);
+	s->MACMergeFrameAssOkCount = enetc_port_rd(hw, ENETC_MMFAOCR);
+	s->MACMergeFragCountRx = enetc_port_rd(hw, ENETC_MMFCRXR);
+	s->MACMergeFragCountTx = enetc_port_rd(hw, ENETC_MMFCTXR);
+	s->MACMergeHoldCount = enetc_port_rd(hw, ENETC_MMHCR);
+}
+
 static int enetc_get_mm(struct net_device *ndev, struct ethtool_mm_state *state)
 {
 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
@@ -1037,6 +1110,7 @@ static const struct ethtool_ops enetc_pf_ethtool_ops = {
 	.set_pauseparam = enetc_set_pauseparam,
 	.get_mm = enetc_get_mm,
 	.set_mm = enetc_set_mm,
+	.get_mm_stats = enetc_get_mm_stats,
 };
 
 static const struct ethtool_ops enetc_vf_ethtool_ops = {

drivers/net/ethernet/freescale/enetc/enetc_hw.h

@@ -240,6 +240,12 @@ enum enetc_bdr_type {TX, RX};
 #define ENETC_MMCSR_LPA		BIT(2) /* Local Preemption Active */
 #define ENETC_MMCSR_LPE		BIT(1) /* Local Preemption Enabled */
 #define ENETC_MMCSR_LPS		BIT(0) /* Local Preemption Supported */
+#define ENETC_MMFAECR		0x1f08
+#define ENETC_MMFSECR		0x1f0c
+#define ENETC_MMFAOCR		0x1f10
+#define ENETC_MMFCRXR		0x1f14
+#define ENETC_MMFCTXR		0x1f18
+#define ENETC_MMHCR		0x1f1c
 #define ENETC_PTCMSDUR(n)	(0x2020 + (n) * 4) /* n = TC index [0..7] */
 
 #define ENETC_PMAC_OFFSET	0x1000