root/drivers/net/ethernet/atheros/atl1c/atl1c_ethtool.c
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright(c) 2009 - 2009 Atheros Corporation. All rights reserved.
 *
 * Derived from Intel e1000 driver
 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
 */

#include <linux/netdevice.h>
#include <linux/ethtool.h>
#include <linux/slab.h>

#include "atl1c.h"

static int atl1c_get_link_ksettings(struct net_device *netdev,
                                    struct ethtool_link_ksettings *cmd)
{
        struct atl1c_adapter *adapter = netdev_priv(netdev);
        struct atl1c_hw *hw = &adapter->hw;
        u32 supported, advertising;

        supported = (SUPPORTED_10baseT_Half  |
                           SUPPORTED_10baseT_Full  |
                           SUPPORTED_100baseT_Half |
                           SUPPORTED_100baseT_Full |
                           SUPPORTED_Autoneg       |
                           SUPPORTED_TP);
        if (hw->link_cap_flags & ATL1C_LINK_CAP_1000M)
                supported |= SUPPORTED_1000baseT_Full;

        advertising = ADVERTISED_TP;

        advertising |= hw->autoneg_advertised;

        cmd->base.port = PORT_TP;
        cmd->base.phy_address = 0;

        if (adapter->link_speed != SPEED_0) {
                cmd->base.speed = adapter->link_speed;
                if (adapter->link_duplex == FULL_DUPLEX)
                        cmd->base.duplex = DUPLEX_FULL;
                else
                        cmd->base.duplex = DUPLEX_HALF;
        } else {
                cmd->base.speed = SPEED_UNKNOWN;
                cmd->base.duplex = DUPLEX_UNKNOWN;
        }

        cmd->base.autoneg = AUTONEG_ENABLE;

        ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
                                                supported);
        ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
                                                advertising);

        return 0;
}

static int atl1c_set_link_ksettings(struct net_device *netdev,
                                    const struct ethtool_link_ksettings *cmd)
{
        struct atl1c_adapter *adapter = netdev_priv(netdev);
        struct atl1c_hw *hw = &adapter->hw;
        u16  autoneg_advertised;

        while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
                msleep(1);

        if (cmd->base.autoneg == AUTONEG_ENABLE) {
                autoneg_advertised = ADVERTISED_Autoneg;
        } else {
                u32 speed = cmd->base.speed;
                if (speed == SPEED_1000) {
                        if (cmd->base.duplex != DUPLEX_FULL) {
                                if (netif_msg_link(adapter))
                                        dev_warn(&adapter->pdev->dev,
                                                "1000M half is invalid\n");
                                clear_bit(__AT_RESETTING, &adapter->flags);
                                return -EINVAL;
                        }
                        autoneg_advertised = ADVERTISED_1000baseT_Full;
                } else if (speed == SPEED_100) {
                        if (cmd->base.duplex == DUPLEX_FULL)
                                autoneg_advertised = ADVERTISED_100baseT_Full;
                        else
                                autoneg_advertised = ADVERTISED_100baseT_Half;
                } else {
                        if (cmd->base.duplex == DUPLEX_FULL)
                                autoneg_advertised = ADVERTISED_10baseT_Full;
                        else
                                autoneg_advertised = ADVERTISED_10baseT_Half;
                }
        }

        if (hw->autoneg_advertised != autoneg_advertised) {
                hw->autoneg_advertised = autoneg_advertised;
                if (atl1c_restart_autoneg(hw) != 0) {
                        if (netif_msg_link(adapter))
                                dev_warn(&adapter->pdev->dev,
                                        "ethtool speed/duplex setting failed\n");
                        clear_bit(__AT_RESETTING, &adapter->flags);
                        return -EINVAL;
                }
        }
        clear_bit(__AT_RESETTING, &adapter->flags);
        return 0;
}

static u32 atl1c_get_msglevel(struct net_device *netdev)
{
        struct atl1c_adapter *adapter = netdev_priv(netdev);
        return adapter->msg_enable;
}

static void atl1c_set_msglevel(struct net_device *netdev, u32 data)
{
        struct atl1c_adapter *adapter = netdev_priv(netdev);
        adapter->msg_enable = data;
}

static int atl1c_get_regs_len(struct net_device *netdev)
{
        return AT_REGS_LEN;
}

static void atl1c_get_regs(struct net_device *netdev,
                           struct ethtool_regs *regs, void *p)
{
        struct atl1c_adapter *adapter = netdev_priv(netdev);
        struct atl1c_hw *hw = &adapter->hw;
        u32 *regs_buff = p;
        u16 phy_data;

        memset(p, 0, AT_REGS_LEN);

        regs->version = 1;
        AT_READ_REG(hw, REG_PM_CTRL,              p++);
        AT_READ_REG(hw, REG_MAC_HALF_DUPLX_CTRL,  p++);
        AT_READ_REG(hw, REG_TWSI_CTRL,            p++);
        AT_READ_REG(hw, REG_PCIE_DEV_MISC_CTRL,   p++);
        AT_READ_REG(hw, REG_MASTER_CTRL,          p++);
        AT_READ_REG(hw, REG_MANUAL_TIMER_INIT,    p++);
        AT_READ_REG(hw, REG_IRQ_MODRT_TIMER_INIT, p++);
        AT_READ_REG(hw, REG_GPHY_CTRL,            p++);
        AT_READ_REG(hw, REG_LINK_CTRL,            p++);
        AT_READ_REG(hw, REG_IDLE_STATUS,          p++);
        AT_READ_REG(hw, REG_MDIO_CTRL,            p++);
        AT_READ_REG(hw, REG_SERDES,               p++);
        AT_READ_REG(hw, REG_MAC_CTRL,             p++);
        AT_READ_REG(hw, REG_MAC_IPG_IFG,          p++);
        AT_READ_REG(hw, REG_MAC_STA_ADDR,         p++);
        AT_READ_REG(hw, REG_MAC_STA_ADDR+4,       p++);
        AT_READ_REG(hw, REG_RX_HASH_TABLE,        p++);
        AT_READ_REG(hw, REG_RX_HASH_TABLE+4,      p++);
        AT_READ_REG(hw, REG_RXQ_CTRL,             p++);
        AT_READ_REG(hw, REG_TXQ_CTRL,             p++);
        AT_READ_REG(hw, REG_MTU,                  p++);
        AT_READ_REG(hw, REG_WOL_CTRL,             p++);

        atl1c_read_phy_reg(hw, MII_BMCR, &phy_data);
        regs_buff[AT_REGS_LEN/sizeof(u32) - 2] = (u32) phy_data;
        atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
        regs_buff[AT_REGS_LEN/sizeof(u32) - 1] = (u32) phy_data;
}

static int atl1c_get_eeprom_len(struct net_device *netdev)
{
        struct atl1c_adapter *adapter = netdev_priv(netdev);

        if (atl1c_check_eeprom_exist(&adapter->hw))
                return AT_EEPROM_LEN;
        else
                return 0;
}

static int atl1c_get_eeprom(struct net_device *netdev,
                struct ethtool_eeprom *eeprom, u8 *bytes)
{
        struct atl1c_adapter *adapter = netdev_priv(netdev);
        struct atl1c_hw *hw = &adapter->hw;
        u32 *eeprom_buff;
        int first_dword, last_dword;
        int ret_val = 0;
        int i;

        if (eeprom->len == 0)
                return -EINVAL;

        if (!atl1c_check_eeprom_exist(hw)) /* not exist */
                return -EINVAL;

        eeprom->magic = adapter->pdev->vendor |
                        (adapter->pdev->device << 16);

        first_dword = eeprom->offset >> 2;
        last_dword = (eeprom->offset + eeprom->len - 1) >> 2;

        eeprom_buff = kmalloc_array(last_dword - first_dword + 1, sizeof(u32),
                                    GFP_KERNEL);
        if (eeprom_buff == NULL)
                return -ENOMEM;

        for (i = first_dword; i < last_dword; i++) {
                if (!atl1c_read_eeprom(hw, i * 4, &(eeprom_buff[i-first_dword]))) {
                        kfree(eeprom_buff);
                        return -EIO;
                }
        }

        memcpy(bytes, (u8 *)eeprom_buff + (eeprom->offset & 3),
                        eeprom->len);
        kfree(eeprom_buff);

        return ret_val;
        return 0;
}

static void atl1c_get_drvinfo(struct net_device *netdev,
                struct ethtool_drvinfo *drvinfo)
{
        struct atl1c_adapter *adapter = netdev_priv(netdev);

        strscpy(drvinfo->driver,  atl1c_driver_name, sizeof(drvinfo->driver));
        strscpy(drvinfo->bus_info, pci_name(adapter->pdev),
                sizeof(drvinfo->bus_info));
}

static void atl1c_get_wol(struct net_device *netdev,
                          struct ethtool_wolinfo *wol)
{
        struct atl1c_adapter *adapter = netdev_priv(netdev);

        wol->supported = WAKE_MAGIC | WAKE_PHY;
        wol->wolopts = 0;

        if (adapter->wol & AT_WUFC_EX)
                wol->wolopts |= WAKE_UCAST;
        if (adapter->wol & AT_WUFC_MC)
                wol->wolopts |= WAKE_MCAST;
        if (adapter->wol & AT_WUFC_BC)
                wol->wolopts |= WAKE_BCAST;
        if (adapter->wol & AT_WUFC_MAG)
                wol->wolopts |= WAKE_MAGIC;
        if (adapter->wol & AT_WUFC_LNKC)
                wol->wolopts |= WAKE_PHY;
}

static int atl1c_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
{
        struct atl1c_adapter *adapter = netdev_priv(netdev);

        if (wol->wolopts & (WAKE_ARP | WAKE_MAGICSECURE |
                            WAKE_UCAST | WAKE_BCAST | WAKE_MCAST))
                return -EOPNOTSUPP;
        /* these settings will always override what we currently have */
        adapter->wol = 0;

        if (wol->wolopts & WAKE_MAGIC)
                adapter->wol |= AT_WUFC_MAG;
        if (wol->wolopts & WAKE_PHY)
                adapter->wol |= AT_WUFC_LNKC;

        device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);

        return 0;
}

static int atl1c_nway_reset(struct net_device *netdev)
{
        struct atl1c_adapter *adapter = netdev_priv(netdev);
        if (netif_running(netdev))
                atl1c_reinit_locked(adapter);
        return 0;
}

static const struct ethtool_ops atl1c_ethtool_ops = {
        .get_drvinfo            = atl1c_get_drvinfo,
        .get_regs_len           = atl1c_get_regs_len,
        .get_regs               = atl1c_get_regs,
        .get_wol                = atl1c_get_wol,
        .set_wol                = atl1c_set_wol,
        .get_msglevel           = atl1c_get_msglevel,
        .set_msglevel           = atl1c_set_msglevel,
        .nway_reset             = atl1c_nway_reset,
        .get_link               = ethtool_op_get_link,
        .get_eeprom_len         = atl1c_get_eeprom_len,
        .get_eeprom             = atl1c_get_eeprom,
        .get_link_ksettings     = atl1c_get_link_ksettings,
        .set_link_ksettings     = atl1c_set_link_ksettings,
};

void atl1c_set_ethtool_ops(struct net_device *netdev)
{
        netdev->ethtool_ops = &atl1c_ethtool_ops;
}