net: ti: icssg-prueth: Add ethtool ops for ICSSG Ethernet driver

Add icssg_ethtool.c file. This file will be used for dumping statistics
via ethtool for ICSSG ethernet driver.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ti/Makefile

@@ -37,3 +37,4 @@ icssg-prueth-y := k3-cppi-desc-pool.o \
 		  icssg/icssg_config.o \
 		  icssg/icssg_mii_cfg.o \
 		  icssg/icssg_stats.o \
+		  icssg/icssg_ethtool.o

drivers/net/ethernet/ti/icssg/icssg_ethtool.c

+// SPDX-License-Identifier: GPL-2.0
+/* Texas Instruments ICSSG Ethernet driver
+ *
+ * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
+ *
+ */
+
+#include "icssg_prueth.h"
+#include "icssg_stats.h"
+
+static void emac_get_drvinfo(struct net_device *ndev,
+			     struct ethtool_drvinfo *info)
+{
+	struct prueth_emac *emac = netdev_priv(ndev);
+	struct prueth *prueth = emac->prueth;
+
+	strscpy(info->driver, dev_driver_string(prueth->dev),
+		sizeof(info->driver));
+	strscpy(info->bus_info, dev_name(prueth->dev), sizeof(info->bus_info));
+}
+
+static u32 emac_get_msglevel(struct net_device *ndev)
+{
+	struct prueth_emac *emac = netdev_priv(ndev);
+
+	return emac->msg_enable;
+}
+
+static void emac_set_msglevel(struct net_device *ndev, u32 value)
+{
+	struct prueth_emac *emac = netdev_priv(ndev);
+
+	emac->msg_enable = value;
+}
+
+static int emac_get_link_ksettings(struct net_device *ndev,
+				   struct ethtool_link_ksettings *ecmd)
+{
+	return phy_ethtool_get_link_ksettings(ndev, ecmd);
+}
+
+static int emac_set_link_ksettings(struct net_device *ndev,
+				   const struct ethtool_link_ksettings *ecmd)
+{
+	return phy_ethtool_set_link_ksettings(ndev, ecmd);
+}
+
+static int emac_get_eee(struct net_device *ndev, struct ethtool_eee *edata)
+{
+	if (!ndev->phydev)
+		return -EOPNOTSUPP;
+
+	return phy_ethtool_get_eee(ndev->phydev, edata);
+}
+
+static int emac_set_eee(struct net_device *ndev, struct ethtool_eee *edata)
+{
+	if (!ndev->phydev)
+		return -EOPNOTSUPP;
+
+	return phy_ethtool_set_eee(ndev->phydev, edata);
+}
+
+static int emac_nway_reset(struct net_device *ndev)
+{
+	return phy_ethtool_nway_reset(ndev);
+}
+
+static int emac_get_sset_count(struct net_device *ndev, int stringset)
+{
+	switch (stringset) {
+	case ETH_SS_STATS:
+		return ICSSG_NUM_ETHTOOL_STATS;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static void emac_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
+{
+	u8 *p = data;
+	int i;
+
+	switch (stringset) {
+	case ETH_SS_STATS:
+		for (i = 0; i < ARRAY_SIZE(icssg_all_stats); i++) {
+			if (!icssg_all_stats[i].standard_stats) {
+				memcpy(p, icssg_all_stats[i].name,
+				       ETH_GSTRING_LEN);
+				p += ETH_GSTRING_LEN;
+			}
+		}
+		break;
+	default:
+		break;
+	}
+}
+
+static void emac_get_ethtool_stats(struct net_device *ndev,
+				   struct ethtool_stats *stats, u64 *data)
+{
+	struct prueth_emac *emac = netdev_priv(ndev);
+	int i;
+
+	emac_update_hardware_stats(emac);
+
+	for (i = 0; i < ARRAY_SIZE(icssg_all_stats); i++)
+		if (!icssg_all_stats[i].standard_stats)
+			*(data++) = emac->stats[i];
+}
+
+static int emac_set_channels(struct net_device *ndev,
+			     struct ethtool_channels *ch)
+{
+	struct prueth_emac *emac = netdev_priv(ndev);
+
+	/* Check if interface is up. Can change the num queues when
+	 * the interface is down.
+	 */
+	if (netif_running(emac->ndev))
+		return -EBUSY;
+
+	emac->tx_ch_num = ch->tx_count;
+
+	return 0;
+}
+
+static void emac_get_channels(struct net_device *ndev,
+			      struct ethtool_channels *ch)
+{
+	struct prueth_emac *emac = netdev_priv(ndev);
+
+	ch->max_rx = 1;
+	ch->max_tx = PRUETH_MAX_TX_QUEUES;
+	ch->rx_count = 1;
+	ch->tx_count = emac->tx_ch_num;
+}
+
+static const struct ethtool_rmon_hist_range emac_rmon_ranges[] = {
+	{    0,   64},
+	{   65,  128},
+	{  129,  256},
+	{  257,  512},
+	{  513, PRUETH_MAX_PKT_SIZE},
+	{}
+};
+
+static void emac_get_rmon_stats(struct net_device *ndev,
+				struct ethtool_rmon_stats *rmon_stats,
+				const struct ethtool_rmon_hist_range **ranges)
+{
+	struct prueth_emac *emac = netdev_priv(ndev);
+
+	*ranges = emac_rmon_ranges;
+
+	rmon_stats->undersize_pkts = emac_get_stat_by_name(emac, "rx_bucket1_frames") -
+				     emac_get_stat_by_name(emac, "rx_64B_frames");
+
+	rmon_stats->hist[0] = emac_get_stat_by_name(emac, "rx_bucket1_frames");
+	rmon_stats->hist[1] = emac_get_stat_by_name(emac, "rx_bucket2_frames");
+	rmon_stats->hist[2] = emac_get_stat_by_name(emac, "rx_bucket3_frames");
+	rmon_stats->hist[3] = emac_get_stat_by_name(emac, "rx_bucket4_frames");
+	rmon_stats->hist[4] = emac_get_stat_by_name(emac, "rx_bucket5_frames");
+
+	rmon_stats->hist_tx[0] = emac_get_stat_by_name(emac, "tx_bucket1_frames");
+	rmon_stats->hist_tx[1] = emac_get_stat_by_name(emac, "tx_bucket2_frames");
+	rmon_stats->hist_tx[2] = emac_get_stat_by_name(emac, "tx_bucket3_frames");
+	rmon_stats->hist_tx[3] = emac_get_stat_by_name(emac, "tx_bucket4_frames");
+	rmon_stats->hist_tx[4] = emac_get_stat_by_name(emac, "tx_bucket5_frames");
+}
+
+const struct ethtool_ops icssg_ethtool_ops = {
+	.get_drvinfo = emac_get_drvinfo,
+	.get_msglevel = emac_get_msglevel,
+	.set_msglevel = emac_set_msglevel,
+	.get_sset_count = emac_get_sset_count,
+	.get_ethtool_stats = emac_get_ethtool_stats,
+	.get_strings = emac_get_strings,
+	.get_channels = emac_get_channels,
+	.set_channels = emac_set_channels,
+	.get_link_ksettings = emac_get_link_ksettings,
+	.set_link_ksettings = emac_set_link_ksettings,
+	.get_link = ethtool_op_get_link,
+	.get_eee = emac_get_eee,
+	.set_eee = emac_set_eee,
+	.nway_reset = emac_nway_reset,
+	.get_rmon_stats = emac_get_rmon_stats,
+};

drivers/net/ethernet/ti/icssg/icssg_prueth.c

@@ -1421,6 +1421,7 @@ static int prueth_netdev_init(struct prueth *prueth,
 	ndev->min_mtu = PRUETH_MIN_PKT_SIZE;
 	ndev->max_mtu = PRUETH_MAX_MTU;
 	ndev->netdev_ops = &emac_netdev_ops;
+	ndev->ethtool_ops = &icssg_ethtool_ops;
 	ndev->hw_features = NETIF_F_SG;
 	ndev->features = ndev->hw_features;
 

drivers/net/ethernet/ti/icssg/icssg_prueth.h

@@ -52,6 +52,7 @@
 /* Number of ICSSG related stats */
 #define ICSSG_NUM_STATS 60
 #define ICSSG_NUM_STANDARD_STATS 31
+#define ICSSG_NUM_ETHTOOL_STATS (ICSSG_NUM_STATS - ICSSG_NUM_STANDARD_STATS)
 
 /* Firmware status codes */
 #define ICSS_HS_FW_READY 0x55555555
@@ -230,6 +231,8 @@ static inline int prueth_emac_slice(struct prueth_emac *emac)
 	}
 }
 
+extern const struct ethtool_ops icssg_ethtool_ops;
+
 /* Classifier helpers */
 void icssg_class_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac);
 void icssg_class_set_host_mac_addr(struct regmap *miig_rt, const u8 *mac);