net: freescale: use ethtool string helpers

The latter is the preferred way to copy ethtool strings.

Avoids manually incrementing the pointer. Cleans up the code quite well.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Lee Trager <lee@trager.us>
Link: https://patch.msgid.link/20241025203757.288367-1-rosenp@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

8 files changed, 51 insertions, 88 deletions

diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c b/drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c
index b0060cf96090..9986f6e1f587 100644
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c
@@ -243,38 +243,24 @@ static void dpaa_get_ethtool_stats(struct net_device *net_dev,
 static void dpaa_get_strings(struct net_device *net_dev, u32 stringset,
 			     u8 *data)
 {
-	unsigned int i, j, num_cpus, size;
-	char string_cpu[ETH_GSTRING_LEN];
-	u8 *strings;
+	unsigned int i, j, num_cpus;
 
-	memset(string_cpu, 0, sizeof(string_cpu));
-	strings   = data;
-	num_cpus  = num_online_cpus();
-	size      = DPAA_STATS_GLOBAL_LEN * ETH_GSTRING_LEN;
+	num_cpus = num_online_cpus();
 
 	for (i = 0; i < DPAA_STATS_PERCPU_LEN; i++) {
-		for (j = 0; j < num_cpus; j++) {
-			snprintf(string_cpu, ETH_GSTRING_LEN, "%s [CPU %d]",
-				 dpaa_stats_percpu[i], j);
-			memcpy(strings, string_cpu, ETH_GSTRING_LEN);
-			strings += ETH_GSTRING_LEN;
-		}
-		snprintf(string_cpu, ETH_GSTRING_LEN, "%s [TOTAL]",
-			 dpaa_stats_percpu[i]);
-		memcpy(strings, string_cpu, ETH_GSTRING_LEN);
-		strings += ETH_GSTRING_LEN;
-	}
-	for (j = 0; j < num_cpus; j++) {
-		snprintf(string_cpu, ETH_GSTRING_LEN,
-			 "bpool [CPU %d]", j);
-		memcpy(strings, string_cpu, ETH_GSTRING_LEN);
-		strings += ETH_GSTRING_LEN;
+		for (j = 0; j < num_cpus; j++)
+			ethtool_sprintf(&data, "%s [CPU %d]",
+					dpaa_stats_percpu[i], j);
+
+		ethtool_sprintf(&data, "%s [TOTAL]", dpaa_stats_percpu[i]);
 	}
-	snprintf(string_cpu, ETH_GSTRING_LEN, "bpool [TOTAL]");
-	memcpy(strings, string_cpu, ETH_GSTRING_LEN);
-	strings += ETH_GSTRING_LEN;
+	for (i = 0; i < num_cpus; i++)
+		ethtool_sprintf(&data, "bpool [CPU %d]", i);
+
+	ethtool_puts(&data, "bpool [TOTAL]");
 
-	memcpy(strings, dpaa_stats_global, size);
+	for (i = 0; i < DPAA_STATS_GLOBAL_LEN; i++)
+		ethtool_puts(&data, dpaa_stats_global[i]);
 }
 
 static int dpaa_get_hash_opts(struct net_device *dev,
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
index 7f476519b7ad..74ef77cb7078 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
@@ -217,20 +217,15 @@ static int dpaa2_eth_set_pauseparam(struct net_device *net_dev,
 static void dpaa2_eth_get_strings(struct net_device *netdev, u32 stringset,
 				  u8 *data)
 {
-	u8 *p = data;
 	int i;
 
 	switch (stringset) {
 	case ETH_SS_STATS:
-		for (i = 0; i < DPAA2_ETH_NUM_STATS; i++) {
-			strscpy(p, dpaa2_ethtool_stats[i], ETH_GSTRING_LEN);
-			p += ETH_GSTRING_LEN;
-		}
-		for (i = 0; i < DPAA2_ETH_NUM_EXTRA_STATS; i++) {
-			strscpy(p, dpaa2_ethtool_extras[i], ETH_GSTRING_LEN);
-			p += ETH_GSTRING_LEN;
-		}
-		dpaa2_mac_get_strings(p);
+		for (i = 0; i < DPAA2_ETH_NUM_STATS; i++)
+			ethtool_puts(&data, dpaa2_ethtool_stats[i]);
+		for (i = 0; i < DPAA2_ETH_NUM_EXTRA_STATS; i++)
+			ethtool_puts(&data, dpaa2_ethtool_extras[i]);
+		dpaa2_mac_get_strings(&data);
 		break;
 	}
 }
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
index a69bb22c37ea..422ce13a7c94 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
@@ -558,15 +558,12 @@ int dpaa2_mac_get_sset_count(void)
 	return DPAA2_MAC_NUM_STATS;
 }
 
-void dpaa2_mac_get_strings(u8 *data)
+void dpaa2_mac_get_strings(u8 **data)
 {
-	u8 *p = data;
 	int i;
 
-	for (i = 0; i < DPAA2_MAC_NUM_STATS; i++) {
-		strscpy(p, dpaa2_mac_ethtool_stats[i], ETH_GSTRING_LEN);
-		p += ETH_GSTRING_LEN;
-	}
+	for (i = 0; i < DPAA2_MAC_NUM_STATS; i++)
+		ethtool_puts(data, dpaa2_mac_ethtool_stats[i]);
 }
 
 void dpaa2_mac_get_ethtool_stats(struct dpaa2_mac *mac, u64 *data)
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.h b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.h
index c1ec9efd413a..53f8d106d11e 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.h
@@ -49,7 +49,7 @@ void dpaa2_mac_disconnect(struct dpaa2_mac *mac);
 
 int dpaa2_mac_get_sset_count(void);
 
-void dpaa2_mac_get_strings(u8 *data);
+void dpaa2_mac_get_strings(u8 **data);
 
 void dpaa2_mac_get_ethtool_stats(struct dpaa2_mac *mac, u64 *data);
 
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-ethtool.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-ethtool.c
index 6bc1988be311..a888f6e6e9b0 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-ethtool.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-ethtool.c
@@ -170,17 +170,16 @@ dpaa2_switch_ethtool_get_sset_count(struct net_device *netdev, int sset)
 static void dpaa2_switch_ethtool_get_strings(struct net_device *netdev,
 					     u32 stringset, u8 *data)
 {
-	u8 *p = data;
+	const char *str;
 	int i;
 
 	switch (stringset) {
 	case ETH_SS_STATS:
 		for (i = 0; i < DPAA2_SWITCH_NUM_COUNTERS; i++) {
-			memcpy(p, dpaa2_switch_ethtool_counters[i].name,
-			       ETH_GSTRING_LEN);
-			p += ETH_GSTRING_LEN;
+			str = dpaa2_switch_ethtool_counters[i].name;
+			ethtool_puts(&data, str);
 		}
-		dpaa2_mac_get_strings(p);
+		dpaa2_mac_get_strings(&data);
 		break;
 	}
 }
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
index 2563eb8ac7b6..e1745b89362d 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
@@ -247,38 +247,25 @@ static int enetc_get_sset_count(struct net_device *ndev, int sset)
 static void enetc_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
 {
 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
-	u8 *p = data;
 	int i, j;
 
 	switch (stringset) {
 	case ETH_SS_STATS:
-		for (i = 0; i < ARRAY_SIZE(enetc_si_counters); i++) {
-			strscpy(p, enetc_si_counters[i].name, ETH_GSTRING_LEN);
-			p += ETH_GSTRING_LEN;
-		}
-		for (i = 0; i < priv->num_tx_rings; i++) {
-			for (j = 0; j < ARRAY_SIZE(tx_ring_stats); j++) {
-				snprintf(p, ETH_GSTRING_LEN, tx_ring_stats[j],
-					 i);
-				p += ETH_GSTRING_LEN;
-			}
-		}
-		for (i = 0; i < priv->num_rx_rings; i++) {
-			for (j = 0; j < ARRAY_SIZE(rx_ring_stats); j++) {
-				snprintf(p, ETH_GSTRING_LEN, rx_ring_stats[j],
-					 i);
-				p += ETH_GSTRING_LEN;
-			}
-		}
+		for (i = 0; i < ARRAY_SIZE(enetc_si_counters); i++)
+			ethtool_puts(&data, enetc_si_counters[i].name);
+		for (i = 0; i < priv->num_tx_rings; i++)
+			for (j = 0; j < ARRAY_SIZE(tx_ring_stats); j++)
+				ethtool_sprintf(&data, tx_ring_stats[j], i);
+		for (i = 0; i < priv->num_rx_rings; i++)
+			for (j = 0; j < ARRAY_SIZE(rx_ring_stats); j++)
+				ethtool_sprintf(&data, rx_ring_stats[j], i);
 
 		if (!enetc_si_is_pf(priv->si))
 			break;
 
-		for (i = 0; i < ARRAY_SIZE(enetc_port_counters); i++) {
-			strscpy(p, enetc_port_counters[i].name,
-				ETH_GSTRING_LEN);
-			p += ETH_GSTRING_LEN;
-		}
+		for (i = 0; i < ARRAY_SIZE(enetc_port_counters); i++)
+			ethtool_puts(&data, enetc_port_counters[i].name);
+
 		break;
 	}
 }
diff --git a/drivers/net/ethernet/freescale/gianfar_ethtool.c b/drivers/net/ethernet/freescale/gianfar_ethtool.c
index a99b95c4bcfb..781d92e703cb 100644
--- a/drivers/net/ethernet/freescale/gianfar_ethtool.c
+++ b/drivers/net/ethernet/freescale/gianfar_ethtool.c
@@ -115,12 +115,14 @@ static const char stat_gstrings[][ETH_GSTRING_LEN] = {
 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
 {
 	struct gfar_private *priv = netdev_priv(dev);
+	int i;
 
 	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
-		memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
+		for (i = 0; i < GFAR_STATS_LEN; i++)
+			ethtool_puts(&buf, stat_gstrings[i]);
 	else
-		memcpy(buf, stat_gstrings,
-		       GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
+		for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
+			ethtool_puts(&buf, stat_gstrings[i]);
 }
 
 /* Fill in an array of 64-bit statistics from various sources.
diff --git a/drivers/net/ethernet/freescale/ucc_geth_ethtool.c b/drivers/net/ethernet/freescale/ucc_geth_ethtool.c
index 601beb93d3b3..699f346faf5c 100644
--- a/drivers/net/ethernet/freescale/ucc_geth_ethtool.c
+++ b/drivers/net/ethernet/freescale/ucc_geth_ethtool.c
@@ -287,20 +287,17 @@ static void uec_get_strings(struct net_device *netdev, u32 stringset, u8 *buf)
 {
 	struct ucc_geth_private *ugeth = netdev_priv(netdev);
 	u32 stats_mode = ugeth->ug_info->statisticsMode;
+	int i;
 
-	if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_HARDWARE) {
-		memcpy(buf, hw_stat_gstrings, UEC_HW_STATS_LEN *
-			       	ETH_GSTRING_LEN);
-		buf += UEC_HW_STATS_LEN * ETH_GSTRING_LEN;
-	}
-	if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_FIRMWARE_TX) {
-		memcpy(buf, tx_fw_stat_gstrings, UEC_TX_FW_STATS_LEN *
-			       	ETH_GSTRING_LEN);
-		buf += UEC_TX_FW_STATS_LEN * ETH_GSTRING_LEN;
-	}
+	if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_HARDWARE)
+		for (i = 0; i < UEC_HW_STATS_LEN; i++)
+			ethtool_puts(&buf, hw_stat_gstrings[i]);
+	if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_FIRMWARE_TX)
+		for (i = 0; i < UEC_TX_FW_STATS_LEN; i++)
+			ethtool_puts(&buf, tx_fw_stat_gstrings[i]);
 	if (stats_mode & UCC_GETH_STATISTICS_GATHERING_MODE_FIRMWARE_RX)
-		memcpy(buf, rx_fw_stat_gstrings, UEC_RX_FW_STATS_LEN *
-			       	ETH_GSTRING_LEN);
+		for (i = 0; i < UEC_RX_FW_STATS_LEN; i++)
+			ethtool_puts(&buf, rx_fw_stat_gstrings[i]);
 }
 
 static void uec_get_ethtool_stats(struct net_device *netdev,