// SPDX-License-Identifier: GPL-2.0-or-later
/* Applied Micro X-Gene SoC Ethernet Driver
 *
 * Copyright (c) 2014, Applied Micro Circuits Corporation
 * Authors: Iyappan Subramanian <isubramanian@apm.com>
 */

#include <linux/ethtool.h>
#include "xgene_enet_main.h"

struct xgene_gstrings_stats {
        char name[ETH_GSTRING_LEN];
        int offset;
        u32 addr;
        u32 mask;
};

#define XGENE_STAT(m) { #m, offsetof(struct rtnl_link_stats64, m) }
#define XGENE_EXTD_STAT(s, a, m)                \
                {                       \
                .name = #s,             \
                .addr = a ## _ADDR,     \
                .mask = m               \
                }

static const struct xgene_gstrings_stats gstrings_stats[] = {
        XGENE_STAT(rx_packets),
        XGENE_STAT(tx_packets),
        XGENE_STAT(rx_bytes),
        XGENE_STAT(tx_bytes),
        XGENE_STAT(rx_errors),
        XGENE_STAT(tx_errors),
        XGENE_STAT(rx_length_errors),
        XGENE_STAT(rx_crc_errors),
        XGENE_STAT(rx_frame_errors),
        XGENE_STAT(rx_fifo_errors)
};

static const struct xgene_gstrings_stats gstrings_extd_stats[] = {
        XGENE_EXTD_STAT(tx_rx_64b_frame_cntr, TR64, 31),
        XGENE_EXTD_STAT(tx_rx_127b_frame_cntr, TR127, 31),
        XGENE_EXTD_STAT(tx_rx_255b_frame_cntr, TR255, 31),
        XGENE_EXTD_STAT(tx_rx_511b_frame_cntr, TR511, 31),
        XGENE_EXTD_STAT(tx_rx_1023b_frame_cntr, TR1K, 31),
        XGENE_EXTD_STAT(tx_rx_1518b_frame_cntr, TRMAX, 31),
        XGENE_EXTD_STAT(tx_rx_1522b_frame_cntr, TRMGV, 31),
        XGENE_EXTD_STAT(rx_fcs_error_cntr, RFCS, 16),
        XGENE_EXTD_STAT(rx_multicast_pkt_cntr, RMCA, 31),
        XGENE_EXTD_STAT(rx_broadcast_pkt_cntr, RBCA, 31),
        XGENE_EXTD_STAT(rx_ctrl_frame_pkt_cntr, RXCF, 16),
        XGENE_EXTD_STAT(rx_pause_frame_pkt_cntr, RXPF, 16),
        XGENE_EXTD_STAT(rx_unk_opcode_cntr, RXUO, 16),
        XGENE_EXTD_STAT(rx_align_err_cntr, RALN, 16),
        XGENE_EXTD_STAT(rx_frame_len_err_cntr, RFLR, 16),
        XGENE_EXTD_STAT(rx_frame_len_err_recov_cntr, DUMP, 0),
        XGENE_EXTD_STAT(rx_code_err_cntr, RCDE, 16),
        XGENE_EXTD_STAT(rx_carrier_sense_err_cntr, RCSE, 16),
        XGENE_EXTD_STAT(rx_undersize_pkt_cntr, RUND, 16),
        XGENE_EXTD_STAT(rx_oversize_pkt_cntr, ROVR, 16),
        XGENE_EXTD_STAT(rx_fragments_cntr, RFRG, 16),
        XGENE_EXTD_STAT(rx_jabber_cntr, RJBR, 16),
        XGENE_EXTD_STAT(rx_jabber_recov_cntr, DUMP, 0),
        XGENE_EXTD_STAT(rx_dropped_pkt_cntr, RDRP, 16),
        XGENE_EXTD_STAT(rx_overrun_cntr, DUMP, 0),
        XGENE_EXTD_STAT(tx_multicast_pkt_cntr, TMCA, 31),
        XGENE_EXTD_STAT(tx_broadcast_pkt_cntr, TBCA, 31),
        XGENE_EXTD_STAT(tx_pause_ctrl_frame_cntr, TXPF, 16),
        XGENE_EXTD_STAT(tx_defer_pkt_cntr, TDFR, 31),
        XGENE_EXTD_STAT(tx_excv_defer_pkt_cntr, TEDF, 31),
        XGENE_EXTD_STAT(tx_single_col_pkt_cntr, TSCL, 31),
        XGENE_EXTD_STAT(tx_multi_col_pkt_cntr, TMCL, 31),
        XGENE_EXTD_STAT(tx_late_col_pkt_cntr, TLCL, 31),
        XGENE_EXTD_STAT(tx_excv_col_pkt_cntr, TXCL, 31),
        XGENE_EXTD_STAT(tx_total_col_cntr, TNCL, 31),
        XGENE_EXTD_STAT(tx_pause_frames_hnrd_cntr, TPFH, 16),
        XGENE_EXTD_STAT(tx_drop_frame_cntr, TDRP, 16),
        XGENE_EXTD_STAT(tx_jabber_frame_cntr, TJBR, 12),
        XGENE_EXTD_STAT(tx_fcs_error_cntr, TFCS, 12),
        XGENE_EXTD_STAT(tx_ctrl_frame_cntr, TXCF, 12),
        XGENE_EXTD_STAT(tx_oversize_frame_cntr, TOVR, 12),
        XGENE_EXTD_STAT(tx_undersize_frame_cntr, TUND, 12),
        XGENE_EXTD_STAT(tx_fragments_cntr, TFRG, 12),
        XGENE_EXTD_STAT(tx_underrun_cntr, DUMP, 0)
};

#define XGENE_STATS_LEN         ARRAY_SIZE(gstrings_stats)
#define XGENE_EXTD_STATS_LEN    ARRAY_SIZE(gstrings_extd_stats)
#define RFCS_IDX                7
#define RALN_IDX                13
#define RFLR_IDX                14
#define FALSE_RFLR_IDX          15
#define RUND_IDX                18
#define FALSE_RJBR_IDX          22
#define RX_OVERRUN_IDX          24
#define TFCS_IDX                38
#define TFRG_IDX                42
#define TX_UNDERRUN_IDX         43

static void xgene_get_drvinfo(struct net_device *ndev,
                              struct ethtool_drvinfo *info)
{
        struct xgene_enet_pdata *pdata = netdev_priv(ndev);
        struct platform_device *pdev = pdata->pdev;

        strcpy(info->driver, "xgene_enet");
        sprintf(info->bus_info, "%s", pdev->name);
}

static int xgene_get_link_ksettings(struct net_device *ndev,
                                    struct ethtool_link_ksettings *cmd)
{
        struct xgene_enet_pdata *pdata = netdev_priv(ndev);
        struct phy_device *phydev = ndev->phydev;
        u32 supported;

        if (phy_interface_mode_is_rgmii(pdata->phy_mode)) {
                if (phydev == NULL)
                        return -ENODEV;

                phy_ethtool_ksettings_get(phydev, cmd);

                return 0;
        } else if (pdata->phy_mode == PHY_INTERFACE_MODE_SGMII) {
                if (pdata->mdio_driver) {
                        if (!phydev)
                                return -ENODEV;

                        phy_ethtool_ksettings_get(phydev, cmd);

                        return 0;
                }

                supported = SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
                        SUPPORTED_MII;
                ethtool_convert_legacy_u32_to_link_mode(
                        cmd->link_modes.supported,
                        supported);
                ethtool_convert_legacy_u32_to_link_mode(
                        cmd->link_modes.advertising,
                        supported);

                cmd->base.speed = SPEED_1000;
                cmd->base.duplex = DUPLEX_FULL;
                cmd->base.port = PORT_MII;
                cmd->base.autoneg = AUTONEG_ENABLE;
        } else {
                supported = SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE;
                ethtool_convert_legacy_u32_to_link_mode(
                        cmd->link_modes.supported,
                        supported);
                ethtool_convert_legacy_u32_to_link_mode(
                        cmd->link_modes.advertising,
                        supported);

                cmd->base.speed = SPEED_10000;
                cmd->base.duplex = DUPLEX_FULL;
                cmd->base.port = PORT_FIBRE;
                cmd->base.autoneg = AUTONEG_DISABLE;
        }

        return 0;
}

static int xgene_set_link_ksettings(struct net_device *ndev,
                                    const struct ethtool_link_ksettings *cmd)
{
        struct xgene_enet_pdata *pdata = netdev_priv(ndev);
        struct phy_device *phydev = ndev->phydev;

        if (phy_interface_mode_is_rgmii(pdata->phy_mode)) {
                if (!phydev)
                        return -ENODEV;

                return phy_ethtool_ksettings_set(phydev, cmd);
        }

        if (pdata->phy_mode == PHY_INTERFACE_MODE_SGMII) {
                if (pdata->mdio_driver) {
                        if (!phydev)
                                return -ENODEV;

                        return phy_ethtool_ksettings_set(phydev, cmd);
                }
        }

        return -EINVAL;
}

static void xgene_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
{
        int i;
        u8 *p = data;

        if (stringset != ETH_SS_STATS)
                return;

        for (i = 0; i < XGENE_STATS_LEN; i++) {
                memcpy(p, gstrings_stats[i].name, ETH_GSTRING_LEN);
                p += ETH_GSTRING_LEN;
        }

        for (i = 0; i < XGENE_EXTD_STATS_LEN; i++) {
                memcpy(p, gstrings_extd_stats[i].name, ETH_GSTRING_LEN);
                p += ETH_GSTRING_LEN;
        }
}

static int xgene_get_sset_count(struct net_device *ndev, int sset)
{
        if (sset != ETH_SS_STATS)
                return -EINVAL;

        return XGENE_STATS_LEN + XGENE_EXTD_STATS_LEN;
}

static void xgene_get_extd_stats(struct xgene_enet_pdata *pdata)
{
        u32 rx_drop, tx_drop;
        u32 mask, tmp;
        int i;

        for (i = 0; i < XGENE_EXTD_STATS_LEN; i++) {
                tmp = xgene_enet_rd_stat(pdata, gstrings_extd_stats[i].addr);
                if (gstrings_extd_stats[i].mask) {
                        mask = GENMASK(gstrings_extd_stats[i].mask - 1, 0);
                        pdata->extd_stats[i] += (tmp & mask);
                }
        }

        if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) {
                /* Errata 10GE_10 - SW should intepret RALN as 0 */
                pdata->extd_stats[RALN_IDX] = 0;
        } else {
                /* Errata ENET_15 - Fixes RFCS, RFLR, TFCS counter */
                pdata->extd_stats[RFCS_IDX] -= pdata->extd_stats[RALN_IDX];
                pdata->extd_stats[RFLR_IDX] -= pdata->extd_stats[RUND_IDX];
                pdata->extd_stats[TFCS_IDX] -= pdata->extd_stats[TFRG_IDX];
        }

        pdata->mac_ops->get_drop_cnt(pdata, &rx_drop, &tx_drop);
        pdata->extd_stats[RX_OVERRUN_IDX] += rx_drop;
        pdata->extd_stats[TX_UNDERRUN_IDX] += tx_drop;

        /* Errata 10GE_8 -  Update Frame recovered from Errata 10GE_8/ENET_11 */
        pdata->extd_stats[FALSE_RFLR_IDX] = pdata->false_rflr;
        /* Errata ENET_15 - Jabber Frame recov'ed from Errata 10GE_10/ENET_15 */
        pdata->extd_stats[FALSE_RJBR_IDX] = pdata->vlan_rjbr;
}

int xgene_extd_stats_init(struct xgene_enet_pdata *pdata)
{
        pdata->extd_stats = devm_kmalloc_array(&pdata->pdev->dev,
                        XGENE_EXTD_STATS_LEN, sizeof(u64), GFP_KERNEL);
        if (!pdata->extd_stats)
                return -ENOMEM;

        xgene_get_extd_stats(pdata);
        memset(pdata->extd_stats, 0, XGENE_EXTD_STATS_LEN * sizeof(u64));

        return 0;
}

static void xgene_get_ethtool_stats(struct net_device *ndev,
                                    struct ethtool_stats *dummy,
                                    u64 *data)
{
        struct xgene_enet_pdata *pdata = netdev_priv(ndev);
        struct rtnl_link_stats64 stats;
        int i;

        dev_get_stats(ndev, &stats);
        for (i = 0; i < XGENE_STATS_LEN; i++)
                data[i] = *(u64 *)((char *)&stats + gstrings_stats[i].offset);

        xgene_get_extd_stats(pdata);
        for (i = 0; i < XGENE_EXTD_STATS_LEN; i++)
                data[i + XGENE_STATS_LEN] = pdata->extd_stats[i];
}

static void xgene_get_pauseparam(struct net_device *ndev,
                                 struct ethtool_pauseparam *pp)
{
        struct xgene_enet_pdata *pdata = netdev_priv(ndev);

        pp->autoneg = pdata->pause_autoneg;
        pp->tx_pause = pdata->tx_pause;
        pp->rx_pause = pdata->rx_pause;
}

static int xgene_set_pauseparam(struct net_device *ndev,
                                struct ethtool_pauseparam *pp)
{
        struct xgene_enet_pdata *pdata = netdev_priv(ndev);
        struct phy_device *phydev = ndev->phydev;

        if (phy_interface_mode_is_rgmii(pdata->phy_mode) ||
            pdata->phy_mode == PHY_INTERFACE_MODE_SGMII) {
                if (!phydev)
                        return -EINVAL;

                if (!phy_validate_pause(phydev, pp))
                        return -EINVAL;

                pdata->pause_autoneg = pp->autoneg;
                pdata->tx_pause = pp->tx_pause;
                pdata->rx_pause = pp->rx_pause;

                phy_set_asym_pause(phydev, pp->rx_pause,  pp->tx_pause);

                if (!pp->autoneg) {
                        pdata->mac_ops->flowctl_tx(pdata, pdata->tx_pause);
                        pdata->mac_ops->flowctl_rx(pdata, pdata->rx_pause);
                }
        } else {
                if (pp->autoneg)
                        return -EINVAL;

                pdata->tx_pause = pp->tx_pause;
                pdata->rx_pause = pp->rx_pause;

                pdata->mac_ops->flowctl_tx(pdata, pdata->tx_pause);
                pdata->mac_ops->flowctl_rx(pdata, pdata->rx_pause);
        }

        return 0;
}

static const struct ethtool_ops xgene_ethtool_ops = {
        .get_drvinfo = xgene_get_drvinfo,
        .get_link = ethtool_op_get_link,
        .get_strings = xgene_get_strings,
        .get_sset_count = xgene_get_sset_count,
        .get_ethtool_stats = xgene_get_ethtool_stats,
        .get_link_ksettings = xgene_get_link_ksettings,
        .set_link_ksettings = xgene_set_link_ksettings,
        .get_pauseparam = xgene_get_pauseparam,
        .set_pauseparam = xgene_set_pauseparam
};

void xgene_enet_set_ethtool_ops(struct net_device *ndev)
{
        ndev->ethtool_ops = &xgene_ethtool_ops;
}