// 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_keee *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_keee *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_get_ts_info(struct net_device *ndev,
			    struct ethtool_ts_info *info)
{
	struct prueth_emac *emac = netdev_priv(ndev);

	info->so_timestamping =
		SOF_TIMESTAMPING_TX_HARDWARE |
		SOF_TIMESTAMPING_TX_SOFTWARE |
		SOF_TIMESTAMPING_RX_HARDWARE |
		SOF_TIMESTAMPING_RX_SOFTWARE |
		SOF_TIMESTAMPING_SOFTWARE |
		SOF_TIMESTAMPING_RAW_HARDWARE;

	info->phc_index = icss_iep_get_ptp_clock_idx(emac->iep);
	info->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ON);
	info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) | BIT(HWTSTAMP_FILTER_ALL);

	return 0;
}

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;

	if (emac->is_sr1)
		emac->tx_ch_num++;

	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;

	/* Disable multiple TX channels due to timeouts
	 * when using more than one queue */
	if (emac->is_sr1)
		ch->max_tx = 1;

	ch->rx_count = 1;
	ch->tx_count = emac->tx_ch_num;

	if (emac->is_sr1)
		ch->tx_count--;
}

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");
}

static int emac_get_coalesce(struct net_device *ndev,
			     struct ethtool_coalesce *coal,
			     struct kernel_ethtool_coalesce *kernel_coal,
			     struct netlink_ext_ack *extack)
{
	struct prueth_emac *emac = netdev_priv(ndev);
	struct prueth_tx_chn *tx_chn;

	tx_chn = &emac->tx_chns[0];

	coal->rx_coalesce_usecs = emac->rx_pace_timeout_ns / 1000;
	coal->tx_coalesce_usecs = tx_chn->tx_pace_timeout_ns / 1000;

	return 0;
}

static int emac_get_per_queue_coalesce(struct net_device *ndev, u32 queue,
				       struct ethtool_coalesce *coal)
{
	struct prueth_emac *emac = netdev_priv(ndev);
	struct prueth_tx_chn *tx_chn;

	if (queue >= PRUETH_MAX_TX_QUEUES)
		return -EINVAL;

	tx_chn = &emac->tx_chns[queue];

	coal->tx_coalesce_usecs = tx_chn->tx_pace_timeout_ns / 1000;

	return 0;
}

static int emac_set_coalesce(struct net_device *ndev,
			     struct ethtool_coalesce *coal,
			     struct kernel_ethtool_coalesce *kernel_coal,
			     struct netlink_ext_ack *extack)
{
	struct prueth_emac *emac = netdev_priv(ndev);
	struct prueth *prueth = emac->prueth;
	struct prueth_tx_chn *tx_chn;

	tx_chn = &emac->tx_chns[0];

	if (coal->rx_coalesce_usecs &&
	    coal->rx_coalesce_usecs < ICSSG_MIN_COALESCE_USECS) {
		dev_info(prueth->dev, "defaulting to min value of %dus for rx-usecs\n",
			 ICSSG_MIN_COALESCE_USECS);
		coal->rx_coalesce_usecs = ICSSG_MIN_COALESCE_USECS;
	}

	if (coal->tx_coalesce_usecs &&
	    coal->tx_coalesce_usecs < ICSSG_MIN_COALESCE_USECS) {
		dev_info(prueth->dev, "defaulting to min value of %dus for tx-usecs\n",
			 ICSSG_MIN_COALESCE_USECS);
		coal->tx_coalesce_usecs = ICSSG_MIN_COALESCE_USECS;
	}

	emac->rx_pace_timeout_ns = coal->rx_coalesce_usecs * 1000;
	tx_chn->tx_pace_timeout_ns = coal->tx_coalesce_usecs * 1000;

	return 0;
}

static int emac_set_per_queue_coalesce(struct net_device *ndev, u32 queue,
				       struct ethtool_coalesce *coal)
{
	struct prueth_emac *emac = netdev_priv(ndev);
	struct prueth *prueth = emac->prueth;
	struct prueth_tx_chn *tx_chn;

	if (queue >= PRUETH_MAX_TX_QUEUES)
		return -EINVAL;

	tx_chn = &emac->tx_chns[queue];

	if (coal->tx_coalesce_usecs &&
	    coal->tx_coalesce_usecs < ICSSG_MIN_COALESCE_USECS) {
		dev_info(prueth->dev, "defaulting to min value of %dus for tx-usecs for tx-%u\n",
			 ICSSG_MIN_COALESCE_USECS, queue);
		coal->tx_coalesce_usecs = ICSSG_MIN_COALESCE_USECS;
	}

	tx_chn->tx_pace_timeout_ns = coal->tx_coalesce_usecs * 1000;

	return 0;
}

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_ts_info = emac_get_ts_info,
	.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |
				     ETHTOOL_COALESCE_TX_USECS,
	.get_coalesce = emac_get_coalesce,
	.set_coalesce = emac_set_coalesce,
	.get_per_queue_coalesce = emac_get_per_queue_coalesce,
	.set_per_queue_coalesce = emac_set_per_queue_coalesce,
	.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,
};