root/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_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)
{
        struct prueth_emac *emac = netdev_priv(ndev);
        switch (stringset) {
        case ETH_SS_STATS:
                if (emac->prueth->pa_stats)
                        return ICSSG_NUM_ETHTOOL_STATS;
                else
                        return ICSSG_NUM_ETHTOOL_STATS - ICSSG_NUM_PA_STATS;
        default:
                return -EOPNOTSUPP;
        }
}

static void emac_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
{
        struct prueth_emac *emac = netdev_priv(ndev);
        u8 *p = data;
        int i;

        switch (stringset) {
        case ETH_SS_STATS:
                for (i = 0; i < ARRAY_SIZE(icssg_all_miig_stats); i++)
                        if (!icssg_all_miig_stats[i].standard_stats)
                                ethtool_puts(&p, icssg_all_miig_stats[i].name);
                if (emac->prueth->pa_stats)
                        for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++)
                                ethtool_puts(&p, icssg_all_pa_stats[i].name);
                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_miig_stats); i++)
                if (!icssg_all_miig_stats[i].standard_stats)
                        *(data++) = emac->stats[i];

        if (emac->prueth->pa_stats)
                for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++)
                        *(data++) = emac->pa_stats[i];
}

static int emac_get_ts_info(struct net_device *ndev,
                            struct kernel_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_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,
};
EXPORT_SYMBOL_GPL(icssg_ethtool_ops);