linux-kernel - [PATCH net-next 2/3] net: enetc: separate 64-bit counters from enetc_port

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Message-Id: <20250620102140.2020008-3-wei.fang@nxp.com>
Date: Fri, 20 Jun 2025 18:21:39 +0800
From: Wei Fang <wei.fang@....com>
To: claudiu.manoil@....com,
	vladimir.oltean@....com,
	xiaoning.wang@....com,
	andrew+netdev@...n.ch,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	imx@...ts.linux.dev
Subject: [PATCH net-next 2/3] net: enetc: separate 64-bit counters from enetc_port_counters

Some counters in enetc_port_counters are 32-bit registers, and some are
64-bit registers. But in the current driver, they are all read through
enetc_port_rd(), which can only read a 32-bit value. Therefore, separate
64-bit counters (enetc_pm_counters) from enetc_port_counters and use
enetc_port_rd64() to read the 64-bit statistics.

Signed-off-by: Wei Fang <wei.fang@....com>
---
 .../net/ethernet/freescale/enetc/enetc_ethtool.c  | 15 ++++++++++++++-
 drivers/net/ethernet/freescale/enetc/enetc_hw.h   |  1 +
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
index 2e5cef646741..2c9aa94c8e3d 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
@@ -142,7 +142,7 @@ static const struct {
 static const struct {
 	int reg;
 	char name[ETH_GSTRING_LEN] __nonstring;
-} enetc_port_counters[] = {
+} enetc_pm_counters[] = {
 	{ ENETC_PM_REOCT(0),	"MAC rx ethernet octets" },
 	{ ENETC_PM_RALN(0),	"MAC rx alignment errors" },
 	{ ENETC_PM_RXPF(0),	"MAC rx valid pause frames" },
@@ -194,6 +194,12 @@ static const struct {
 	{ ENETC_PM_TSCOL(0),	"MAC tx single collisions" },
 	{ ENETC_PM_TLCOL(0),	"MAC tx late collisions" },
 	{ ENETC_PM_TECOL(0),	"MAC tx excessive collisions" },
+};
+
+static const struct {
+	int reg;
+	char name[ETH_GSTRING_LEN] __nonstring;
+} enetc_port_counters[] = {
 	{ ENETC_UFDMF,		"SI MAC nomatch u-cast discards" },
 	{ ENETC_MFDMF,		"SI MAC nomatch m-cast discards" },
 	{ ENETC_PBFDSIR,	"SI MAC nomatch b-cast discards" },
@@ -240,6 +246,7 @@ static int enetc_get_sset_count(struct net_device *ndev, int sset)
 		return len;
 
 	len += ARRAY_SIZE(enetc_port_counters);
+	len += ARRAY_SIZE(enetc_pm_counters);
 
 	return len;
 }
@@ -266,6 +273,9 @@ static void enetc_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
 		for (i = 0; i < ARRAY_SIZE(enetc_port_counters); i++)
 			ethtool_cpy(&data, enetc_port_counters[i].name);
 
+		for (i = 0; i < ARRAY_SIZE(enetc_pm_counters); i++)
+			ethtool_cpy(&data, enetc_pm_counters[i].name);
+
 		break;
 	}
 }
@@ -302,6 +312,9 @@ static void enetc_get_ethtool_stats(struct net_device *ndev,
 
 	for (i = 0; i < ARRAY_SIZE(enetc_port_counters); i++)
 		data[o++] = enetc_port_rd(hw, enetc_port_counters[i].reg);
+
+	for (i = 0; i < ARRAY_SIZE(enetc_pm_counters); i++)
+		data[o++] = enetc_port_rd64(hw, enetc_pm_counters[i].reg);
 }
 
 static void enetc_pause_stats(struct enetc_hw *hw, int mac,
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_hw.h b/drivers/net/ethernet/freescale/enetc/enetc_hw.h
index cb26f185f52f..d4bbb07199c5 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_hw.h
+++ b/drivers/net/ethernet/freescale/enetc/enetc_hw.h
@@ -536,6 +536,7 @@ static inline u64 _enetc_rd_reg64_wa(void __iomem *reg)
 /* port register accessors - PF only */
 #define enetc_port_rd(hw, off)		enetc_rd_reg((hw)->port + (off))
 #define enetc_port_wr(hw, off, val)	enetc_wr_reg((hw)->port + (off), val)
+#define enetc_port_rd64(hw, off)	_enetc_rd_reg64_wa((hw)->port + (off))
 #define enetc_port_rd_mdio(hw, off)	_enetc_rd_mdio_reg_wa((hw)->port + (off))
 #define enetc_port_wr_mdio(hw, off, val)	_enetc_wr_mdio_reg_wa(\
 							(hw)->port + (off), val)
-- 
2.34.1