// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2019 Intel Corporation. */

#include <linux/ethtool.h>
#include <linux/vmalloc.h>

#include "fm10k.h"

struct fm10k_stats {
        /* The stat_string is expected to be a format string formatted using
         * vsnprintf by fm10k_add_stat_strings. Every member of a stats array
         * should use the same format specifiers as they will be formatted
         * using the same variadic arguments.
         */
        char stat_string[ETH_GSTRING_LEN];
        int sizeof_stat;
        int stat_offset;
};

#define FM10K_STAT_FIELDS(_type, _name, _stat) { \
        .stat_string = _name, \
        .sizeof_stat = sizeof_field(_type, _stat), \
        .stat_offset = offsetof(_type, _stat) \
}

/* netdevice statistics */
#define FM10K_NETDEV_STAT(_net_stat) \
        FM10K_STAT_FIELDS(struct net_device_stats, __stringify(_net_stat), \
                          _net_stat)

static const struct fm10k_stats fm10k_gstrings_net_stats[] = {
        FM10K_NETDEV_STAT(tx_packets),
        FM10K_NETDEV_STAT(tx_bytes),
        FM10K_NETDEV_STAT(tx_errors),
        FM10K_NETDEV_STAT(rx_packets),
        FM10K_NETDEV_STAT(rx_bytes),
        FM10K_NETDEV_STAT(rx_errors),
        FM10K_NETDEV_STAT(rx_dropped),

        /* detailed Rx errors */
        FM10K_NETDEV_STAT(rx_length_errors),
        FM10K_NETDEV_STAT(rx_crc_errors),
        FM10K_NETDEV_STAT(rx_fifo_errors),
};

#define FM10K_NETDEV_STATS_LEN  ARRAY_SIZE(fm10k_gstrings_net_stats)

/* General interface statistics */
#define FM10K_STAT(_name, _stat) \
        FM10K_STAT_FIELDS(struct fm10k_intfc, _name, _stat)

static const struct fm10k_stats fm10k_gstrings_global_stats[] = {
        FM10K_STAT("tx_restart_queue", restart_queue),
        FM10K_STAT("tx_busy", tx_busy),
        FM10K_STAT("tx_csum_errors", tx_csum_errors),
        FM10K_STAT("rx_alloc_failed", alloc_failed),
        FM10K_STAT("rx_csum_errors", rx_csum_errors),

        FM10K_STAT("tx_packets_nic", tx_packets_nic),
        FM10K_STAT("tx_bytes_nic", tx_bytes_nic),
        FM10K_STAT("rx_packets_nic", rx_packets_nic),
        FM10K_STAT("rx_bytes_nic", rx_bytes_nic),
        FM10K_STAT("rx_drops_nic", rx_drops_nic),
        FM10K_STAT("rx_overrun_pf", rx_overrun_pf),
        FM10K_STAT("rx_overrun_vf", rx_overrun_vf),

        FM10K_STAT("swapi_status", hw.swapi.status),
        FM10K_STAT("mac_rules_used", hw.swapi.mac.used),
        FM10K_STAT("mac_rules_avail", hw.swapi.mac.avail),

        FM10K_STAT("reset_while_pending", hw.mac.reset_while_pending),

        FM10K_STAT("tx_hang_count", tx_timeout_count),
};

static const struct fm10k_stats fm10k_gstrings_pf_stats[] = {
        FM10K_STAT("timeout", stats.timeout.count),
        FM10K_STAT("ur", stats.ur.count),
        FM10K_STAT("ca", stats.ca.count),
        FM10K_STAT("um", stats.um.count),
        FM10K_STAT("xec", stats.xec.count),
        FM10K_STAT("vlan_drop", stats.vlan_drop.count),
        FM10K_STAT("loopback_drop", stats.loopback_drop.count),
        FM10K_STAT("nodesc_drop", stats.nodesc_drop.count),
};

/* mailbox statistics */
#define FM10K_MBX_STAT(_name, _stat) \
        FM10K_STAT_FIELDS(struct fm10k_mbx_info, _name, _stat)

static const struct fm10k_stats fm10k_gstrings_mbx_stats[] = {
        FM10K_MBX_STAT("mbx_tx_busy", tx_busy),
        FM10K_MBX_STAT("mbx_tx_dropped", tx_dropped),
        FM10K_MBX_STAT("mbx_tx_messages", tx_messages),
        FM10K_MBX_STAT("mbx_tx_dwords", tx_dwords),
        FM10K_MBX_STAT("mbx_tx_mbmem_pulled", tx_mbmem_pulled),
        FM10K_MBX_STAT("mbx_rx_messages", rx_messages),
        FM10K_MBX_STAT("mbx_rx_dwords", rx_dwords),
        FM10K_MBX_STAT("mbx_rx_parse_err", rx_parse_err),
        FM10K_MBX_STAT("mbx_rx_mbmem_pushed", rx_mbmem_pushed),
};

/* per-queue ring statistics */
#define FM10K_QUEUE_STAT(_name, _stat) \
        FM10K_STAT_FIELDS(struct fm10k_ring, _name, _stat)

static const struct fm10k_stats fm10k_gstrings_queue_stats[] = {
        FM10K_QUEUE_STAT("%s_queue_%u_packets", stats.packets),
        FM10K_QUEUE_STAT("%s_queue_%u_bytes", stats.bytes),
};

#define FM10K_GLOBAL_STATS_LEN ARRAY_SIZE(fm10k_gstrings_global_stats)
#define FM10K_PF_STATS_LEN ARRAY_SIZE(fm10k_gstrings_pf_stats)
#define FM10K_MBX_STATS_LEN ARRAY_SIZE(fm10k_gstrings_mbx_stats)
#define FM10K_QUEUE_STATS_LEN ARRAY_SIZE(fm10k_gstrings_queue_stats)

#define FM10K_STATIC_STATS_LEN (FM10K_GLOBAL_STATS_LEN + \
                                FM10K_NETDEV_STATS_LEN + \
                                FM10K_MBX_STATS_LEN)

static const char fm10k_gstrings_test[][ETH_GSTRING_LEN] = {
        "Mailbox test (on/offline)"
};

#define FM10K_TEST_LEN (sizeof(fm10k_gstrings_test) / ETH_GSTRING_LEN)

enum fm10k_self_test_types {
        FM10K_TEST_MBX,
        FM10K_TEST_MAX = FM10K_TEST_LEN
};

enum {
        FM10K_PRV_FLAG_LEN,
};

static const char fm10k_prv_flags[FM10K_PRV_FLAG_LEN][ETH_GSTRING_LEN] = {
};

static void __fm10k_add_stat_strings(u8 **p, const struct fm10k_stats stats[],
                                     const unsigned int size, ...)
{
        unsigned int i;

        for (i = 0; i < size; i++) {
                va_list args;

                va_start(args, size);
                vsnprintf(*p, ETH_GSTRING_LEN, stats[i].stat_string, args);
                *p += ETH_GSTRING_LEN;
                va_end(args);
        }
}

#define fm10k_add_stat_strings(p, stats, ...) \
        __fm10k_add_stat_strings(p, stats, ARRAY_SIZE(stats), ## __VA_ARGS__)

static void fm10k_get_stat_strings(struct net_device *dev, u8 *data)
{
        struct fm10k_intfc *interface = netdev_priv(dev);
        unsigned int i;

        fm10k_add_stat_strings(&data, fm10k_gstrings_net_stats);

        fm10k_add_stat_strings(&data, fm10k_gstrings_global_stats);

        fm10k_add_stat_strings(&data, fm10k_gstrings_mbx_stats);

        if (interface->hw.mac.type != fm10k_mac_vf)
                fm10k_add_stat_strings(&data, fm10k_gstrings_pf_stats);

        for (i = 0; i < interface->hw.mac.max_queues; i++) {
                fm10k_add_stat_strings(&data, fm10k_gstrings_queue_stats,
                                       "tx", i);

                fm10k_add_stat_strings(&data, fm10k_gstrings_queue_stats,
                                       "rx", i);
        }
}

static void fm10k_get_strings(struct net_device *dev,
                              u32 stringset, u8 *data)
{
        switch (stringset) {
        case ETH_SS_TEST:
                memcpy(data, fm10k_gstrings_test,
                       FM10K_TEST_LEN * ETH_GSTRING_LEN);
                break;
        case ETH_SS_STATS:
                fm10k_get_stat_strings(dev, data);
                break;
        case ETH_SS_PRIV_FLAGS:
                memcpy(data, fm10k_prv_flags,
                       FM10K_PRV_FLAG_LEN * ETH_GSTRING_LEN);
                break;
        }
}

static int fm10k_get_sset_count(struct net_device *dev, int sset)
{
        struct fm10k_intfc *interface = netdev_priv(dev);
        struct fm10k_hw *hw = &interface->hw;
        int stats_len = FM10K_STATIC_STATS_LEN;

        switch (sset) {
        case ETH_SS_TEST:
                return FM10K_TEST_LEN;
        case ETH_SS_STATS:
                stats_len += hw->mac.max_queues * 2 * FM10K_QUEUE_STATS_LEN;

                if (hw->mac.type != fm10k_mac_vf)
                        stats_len += FM10K_PF_STATS_LEN;

                return stats_len;
        case ETH_SS_PRIV_FLAGS:
                return FM10K_PRV_FLAG_LEN;
        default:
                return -EOPNOTSUPP;
        }
}

static void __fm10k_add_ethtool_stats(u64 **data, void *pointer,
                                      const struct fm10k_stats stats[],
                                      const unsigned int size)
{
        unsigned int i;

        if (!pointer) {
                /* memory is not zero allocated so we have to clear it */
                for (i = 0; i < size; i++)
                        *((*data)++) = 0;
                return;
        }

        for (i = 0; i < size; i++) {
                char *p = (char *)pointer + stats[i].stat_offset;

                switch (stats[i].sizeof_stat) {
                case sizeof(u64):
                        *((*data)++) = *(u64 *)p;
                        break;
                case sizeof(u32):
                        *((*data)++) = *(u32 *)p;
                        break;
                case sizeof(u16):
                        *((*data)++) = *(u16 *)p;
                        break;
                case sizeof(u8):
                        *((*data)++) = *(u8 *)p;
                        break;
                default:
                        WARN_ONCE(1, "unexpected stat size for %s",
                                  stats[i].stat_string);
                        *((*data)++) = 0;
                }
        }
}

#define fm10k_add_ethtool_stats(data, pointer, stats) \
        __fm10k_add_ethtool_stats(data, pointer, stats, ARRAY_SIZE(stats))

static void fm10k_get_ethtool_stats(struct net_device *netdev,
                                    struct ethtool_stats __always_unused *stats,
                                    u64 *data)
{
        struct fm10k_intfc *interface = netdev_priv(netdev);
        struct net_device_stats *net_stats = &netdev->stats;
        int i;

        fm10k_update_stats(interface);

        fm10k_add_ethtool_stats(&data, net_stats, fm10k_gstrings_net_stats);

        fm10k_add_ethtool_stats(&data, interface, fm10k_gstrings_global_stats);

        fm10k_add_ethtool_stats(&data, &interface->hw.mbx,
                                fm10k_gstrings_mbx_stats);

        if (interface->hw.mac.type != fm10k_mac_vf) {
                fm10k_add_ethtool_stats(&data, interface,
                                        fm10k_gstrings_pf_stats);
        }

        for (i = 0; i < interface->hw.mac.max_queues; i++) {
                struct fm10k_ring *ring;

                ring = interface->tx_ring[i];
                fm10k_add_ethtool_stats(&data, ring,
                                        fm10k_gstrings_queue_stats);

                ring = interface->rx_ring[i];
                fm10k_add_ethtool_stats(&data, ring,
                                        fm10k_gstrings_queue_stats);
        }
}

/* If function below adds more registers this define needs to be updated */
#define FM10K_REGS_LEN_Q 29

static void fm10k_get_reg_q(struct fm10k_hw *hw, u32 *buff, int i)
{
        int idx = 0;

        buff[idx++] = fm10k_read_reg(hw, FM10K_RDBAL(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_RDBAH(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_RDLEN(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_TPH_RXCTRL(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_RDH(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_RDT(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_RXQCTL(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_RXDCTL(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_RXINT(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_SRRCTL(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_QPRC(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_QPRDC(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_QBRC_L(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_QBRC_H(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_TDBAL(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_TDBAH(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_TDLEN(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_TPH_TXCTRL(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_TDH(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_TDT(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_TXDCTL(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_TXQCTL(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_TXINT(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_QPTC(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_QBTC_L(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_QBTC_H(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_TQDLOC(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_TX_SGLORT(i));
        buff[idx++] = fm10k_read_reg(hw, FM10K_PFVTCTL(i));

        BUG_ON(idx != FM10K_REGS_LEN_Q);
}

/* If function above adds more registers this define needs to be updated */
#define FM10K_REGS_LEN_VSI 43

static void fm10k_get_reg_vsi(struct fm10k_hw *hw, u32 *buff, int i)
{
        int idx = 0, j;

        buff[idx++] = fm10k_read_reg(hw, FM10K_MRQC(i));
        for (j = 0; j < 10; j++)
                buff[idx++] = fm10k_read_reg(hw, FM10K_RSSRK(i, j));
        for (j = 0; j < 32; j++)
                buff[idx++] = fm10k_read_reg(hw, FM10K_RETA(i, j));

        BUG_ON(idx != FM10K_REGS_LEN_VSI);
}

static void fm10k_get_regs(struct net_device *netdev,
                           struct ethtool_regs *regs, void *p)
{
        struct fm10k_intfc *interface = netdev_priv(netdev);
        struct fm10k_hw *hw = &interface->hw;
        u32 *buff = p;
        u16 i;

        regs->version = BIT(24) | (hw->revision_id << 16) | hw->device_id;

        switch (hw->mac.type) {
        case fm10k_mac_pf:
                /* General PF Registers */
                *(buff++) = fm10k_read_reg(hw, FM10K_CTRL);
                *(buff++) = fm10k_read_reg(hw, FM10K_CTRL_EXT);
                *(buff++) = fm10k_read_reg(hw, FM10K_GCR);
                *(buff++) = fm10k_read_reg(hw, FM10K_GCR_EXT);

                for (i = 0; i < 8; i++) {
                        *(buff++) = fm10k_read_reg(hw, FM10K_DGLORTMAP(i));
                        *(buff++) = fm10k_read_reg(hw, FM10K_DGLORTDEC(i));
                }

                for (i = 0; i < 65; i++) {
                        fm10k_get_reg_vsi(hw, buff, i);
                        buff += FM10K_REGS_LEN_VSI;
                }

                *(buff++) = fm10k_read_reg(hw, FM10K_DMA_CTRL);
                *(buff++) = fm10k_read_reg(hw, FM10K_DMA_CTRL2);

                for (i = 0; i < FM10K_MAX_QUEUES_PF; i++) {
                        fm10k_get_reg_q(hw, buff, i);
                        buff += FM10K_REGS_LEN_Q;
                }

                *(buff++) = fm10k_read_reg(hw, FM10K_TPH_CTRL);

                for (i = 0; i < 8; i++)
                        *(buff++) = fm10k_read_reg(hw, FM10K_INT_MAP(i));

                /* Interrupt Throttling Registers */
                for (i = 0; i < 130; i++)
                        *(buff++) = fm10k_read_reg(hw, FM10K_ITR(i));

                break;
        case fm10k_mac_vf:
                /* General VF registers */
                *(buff++) = fm10k_read_reg(hw, FM10K_VFCTRL);
                *(buff++) = fm10k_read_reg(hw, FM10K_VFINT_MAP);
                *(buff++) = fm10k_read_reg(hw, FM10K_VFSYSTIME);

                /* Interrupt Throttling Registers */
                for (i = 0; i < 8; i++)
                        *(buff++) = fm10k_read_reg(hw, FM10K_VFITR(i));

                fm10k_get_reg_vsi(hw, buff, 0);
                buff += FM10K_REGS_LEN_VSI;

                for (i = 0; i < FM10K_MAX_QUEUES_POOL; i++) {
                        if (i < hw->mac.max_queues)
                                fm10k_get_reg_q(hw, buff, i);
                        else
                                memset(buff, 0, sizeof(u32) * FM10K_REGS_LEN_Q);
                        buff += FM10K_REGS_LEN_Q;
                }

                break;
        default:
                return;
        }
}

/* If function above adds more registers these define need to be updated */
#define FM10K_REGS_LEN_PF \
(162 + (65 * FM10K_REGS_LEN_VSI) + (FM10K_MAX_QUEUES_PF * FM10K_REGS_LEN_Q))
#define FM10K_REGS_LEN_VF \
(11 + FM10K_REGS_LEN_VSI + (FM10K_MAX_QUEUES_POOL * FM10K_REGS_LEN_Q))

static int fm10k_get_regs_len(struct net_device *netdev)
{
        struct fm10k_intfc *interface = netdev_priv(netdev);
        struct fm10k_hw *hw = &interface->hw;

        switch (hw->mac.type) {
        case fm10k_mac_pf:
                return FM10K_REGS_LEN_PF * sizeof(u32);
        case fm10k_mac_vf:
                return FM10K_REGS_LEN_VF * sizeof(u32);
        default:
                return 0;
        }
}

static void fm10k_get_drvinfo(struct net_device *dev,
                              struct ethtool_drvinfo *info)
{
        struct fm10k_intfc *interface = netdev_priv(dev);

        strscpy(info->driver, fm10k_driver_name,
                sizeof(info->driver));
        strscpy(info->bus_info, pci_name(interface->pdev),
                sizeof(info->bus_info));
}

static void fm10k_get_pauseparam(struct net_device *dev,
                                 struct ethtool_pauseparam *pause)
{
        struct fm10k_intfc *interface = netdev_priv(dev);

        /* record fixed values for autoneg and tx pause */
        pause->autoneg = 0;
        pause->tx_pause = 1;

        pause->rx_pause = interface->rx_pause ? 1 : 0;
}

static int fm10k_set_pauseparam(struct net_device *dev,
                                struct ethtool_pauseparam *pause)
{
        struct fm10k_intfc *interface = netdev_priv(dev);
        struct fm10k_hw *hw = &interface->hw;

        if (pause->autoneg || !pause->tx_pause)
                return -EINVAL;

        /* we can only support pause on the PF to avoid head-of-line blocking */
        if (hw->mac.type == fm10k_mac_pf)
                interface->rx_pause = pause->rx_pause ? ~0 : 0;
        else if (pause->rx_pause)
                return -EINVAL;

        if (netif_running(dev))
                fm10k_update_rx_drop_en(interface);

        return 0;
}

static u32 fm10k_get_msglevel(struct net_device *netdev)
{
        struct fm10k_intfc *interface = netdev_priv(netdev);

        return interface->msg_enable;
}

static void fm10k_set_msglevel(struct net_device *netdev, u32 data)
{
        struct fm10k_intfc *interface = netdev_priv(netdev);

        interface->msg_enable = data;
}

static void fm10k_get_ringparam(struct net_device *netdev,
                                struct ethtool_ringparam *ring,
                                struct kernel_ethtool_ringparam *kernel_ring,
                                struct netlink_ext_ack *extack)
{
        struct fm10k_intfc *interface = netdev_priv(netdev);

        ring->rx_max_pending = FM10K_MAX_RXD;
        ring->tx_max_pending = FM10K_MAX_TXD;
        ring->rx_mini_max_pending = 0;
        ring->rx_jumbo_max_pending = 0;
        ring->rx_pending = interface->rx_ring_count;
        ring->tx_pending = interface->tx_ring_count;
        ring->rx_mini_pending = 0;
        ring->rx_jumbo_pending = 0;
}

static int fm10k_set_ringparam(struct net_device *netdev,
                               struct ethtool_ringparam *ring,
                               struct kernel_ethtool_ringparam *kernel_ring,
                               struct netlink_ext_ack *extack)
{
        struct fm10k_intfc *interface = netdev_priv(netdev);
        struct fm10k_ring *temp_ring;
        int i, err = 0;
        u32 new_rx_count, new_tx_count;

        if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
                return -EINVAL;

        new_tx_count = clamp_t(u32, ring->tx_pending,
                               FM10K_MIN_TXD, FM10K_MAX_TXD);
        new_tx_count = ALIGN(new_tx_count, FM10K_REQ_TX_DESCRIPTOR_MULTIPLE);

        new_rx_count = clamp_t(u32, ring->rx_pending,
                               FM10K_MIN_RXD, FM10K_MAX_RXD);
        new_rx_count = ALIGN(new_rx_count, FM10K_REQ_RX_DESCRIPTOR_MULTIPLE);

        if ((new_tx_count == interface->tx_ring_count) &&
            (new_rx_count == interface->rx_ring_count)) {
                /* nothing to do */
                return 0;
        }

        while (test_and_set_bit(__FM10K_RESETTING, interface->state))
                usleep_range(1000, 2000);

        if (!netif_running(interface->netdev)) {
                for (i = 0; i < interface->num_tx_queues; i++)
                        interface->tx_ring[i]->count = new_tx_count;
                for (i = 0; i < interface->num_rx_queues; i++)
                        interface->rx_ring[i]->count = new_rx_count;
                interface->tx_ring_count = new_tx_count;
                interface->rx_ring_count = new_rx_count;
                goto clear_reset;
        }

        /* allocate temporary buffer to store rings in */
        i = max_t(int, interface->num_tx_queues, interface->num_rx_queues);
        temp_ring = vmalloc_array(i, sizeof(struct fm10k_ring));

        if (!temp_ring) {
                err = -ENOMEM;
                goto clear_reset;
        }

        fm10k_down(interface);

        /* Setup new Tx resources and free the old Tx resources in that order.
         * We can then assign the new resources to the rings via a memcpy.
         * The advantage to this approach is that we are guaranteed to still
         * have resources even in the case of an allocation failure.
         */
        if (new_tx_count != interface->tx_ring_count) {
                for (i = 0; i < interface->num_tx_queues; i++) {
                        memcpy(&temp_ring[i], interface->tx_ring[i],
                               sizeof(struct fm10k_ring));

                        temp_ring[i].count = new_tx_count;
                        err = fm10k_setup_tx_resources(&temp_ring[i]);
                        if (err) {
                                while (i) {
                                        i--;
                                        fm10k_free_tx_resources(&temp_ring[i]);
                                }
                                goto err_setup;
                        }
                }

                for (i = 0; i < interface->num_tx_queues; i++) {
                        fm10k_free_tx_resources(interface->tx_ring[i]);

                        memcpy(interface->tx_ring[i], &temp_ring[i],
                               sizeof(struct fm10k_ring));
                }

                interface->tx_ring_count = new_tx_count;
        }

        /* Repeat the process for the Rx rings if needed */
        if (new_rx_count != interface->rx_ring_count) {
                for (i = 0; i < interface->num_rx_queues; i++) {
                        memcpy(&temp_ring[i], interface->rx_ring[i],
                               sizeof(struct fm10k_ring));

                        temp_ring[i].count = new_rx_count;
                        err = fm10k_setup_rx_resources(&temp_ring[i]);
                        if (err) {
                                while (i) {
                                        i--;
                                        fm10k_free_rx_resources(&temp_ring[i]);
                                }
                                goto err_setup;
                        }
                }

                for (i = 0; i < interface->num_rx_queues; i++) {
                        fm10k_free_rx_resources(interface->rx_ring[i]);

                        memcpy(interface->rx_ring[i], &temp_ring[i],
                               sizeof(struct fm10k_ring));
                }

                interface->rx_ring_count = new_rx_count;
        }

err_setup:
        fm10k_up(interface);
        vfree(temp_ring);
clear_reset:
        clear_bit(__FM10K_RESETTING, interface->state);
        return err;
}

static int fm10k_get_coalesce(struct net_device *dev,
                              struct ethtool_coalesce *ec,
                              struct kernel_ethtool_coalesce *kernel_coal,
                              struct netlink_ext_ack *extack)
{
        struct fm10k_intfc *interface = netdev_priv(dev);

        ec->use_adaptive_tx_coalesce = ITR_IS_ADAPTIVE(interface->tx_itr);
        ec->tx_coalesce_usecs = interface->tx_itr & ~FM10K_ITR_ADAPTIVE;

        ec->use_adaptive_rx_coalesce = ITR_IS_ADAPTIVE(interface->rx_itr);
        ec->rx_coalesce_usecs = interface->rx_itr & ~FM10K_ITR_ADAPTIVE;

        return 0;
}

static int fm10k_set_coalesce(struct net_device *dev,
                              struct ethtool_coalesce *ec,
                              struct kernel_ethtool_coalesce *kernel_coal,
                              struct netlink_ext_ack *extack)
{
        struct fm10k_intfc *interface = netdev_priv(dev);
        u16 tx_itr, rx_itr;
        int i;

        /* verify limits */
        if ((ec->rx_coalesce_usecs > FM10K_ITR_MAX) ||
            (ec->tx_coalesce_usecs > FM10K_ITR_MAX))
                return -EINVAL;

        /* record settings */
        tx_itr = ec->tx_coalesce_usecs;
        rx_itr = ec->rx_coalesce_usecs;

        /* set initial values for adaptive ITR */
        if (ec->use_adaptive_tx_coalesce)
                tx_itr = FM10K_ITR_ADAPTIVE | FM10K_TX_ITR_DEFAULT;

        if (ec->use_adaptive_rx_coalesce)
                rx_itr = FM10K_ITR_ADAPTIVE | FM10K_RX_ITR_DEFAULT;

        /* update interface */
        interface->tx_itr = tx_itr;
        interface->rx_itr = rx_itr;

        /* update q_vectors */
        for (i = 0; i < interface->num_q_vectors; i++) {
                struct fm10k_q_vector *qv = interface->q_vector[i];

                qv->tx.itr = tx_itr;
                qv->rx.itr = rx_itr;
        }

        return 0;
}

static int fm10k_get_rssh_fields(struct net_device *dev,
                                 struct ethtool_rxfh_fields *cmd)
{
        struct fm10k_intfc *interface = netdev_priv(dev);

        cmd->data = 0;

        /* Report default options for RSS on fm10k */
        switch (cmd->flow_type) {
        case TCP_V4_FLOW:
        case TCP_V6_FLOW:
                cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
                fallthrough;
        case UDP_V4_FLOW:
                if (test_bit(FM10K_FLAG_RSS_FIELD_IPV4_UDP,
                             interface->flags))
                        cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
                fallthrough;
        case SCTP_V4_FLOW:
        case SCTP_V6_FLOW:
        case AH_ESP_V4_FLOW:
        case AH_ESP_V6_FLOW:
        case AH_V4_FLOW:
        case AH_V6_FLOW:
        case ESP_V4_FLOW:
        case ESP_V6_FLOW:
        case IPV4_FLOW:
        case IPV6_FLOW:
                cmd->data |= RXH_IP_SRC | RXH_IP_DST;
                break;
        case UDP_V6_FLOW:
                if (test_bit(FM10K_FLAG_RSS_FIELD_IPV6_UDP,
                             interface->flags))
                        cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
                cmd->data |= RXH_IP_SRC | RXH_IP_DST;
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static u32 fm10k_get_rx_ring_count(struct net_device *dev)
{
        struct fm10k_intfc *interface = netdev_priv(dev);

        return interface->num_rx_queues;
}

static int fm10k_set_rssh_fields(struct net_device *dev,
                                 const struct ethtool_rxfh_fields *nfc,
                                 struct netlink_ext_ack *extack)
{
        struct fm10k_intfc *interface = netdev_priv(dev);
        int rss_ipv4_udp = test_bit(FM10K_FLAG_RSS_FIELD_IPV4_UDP,
                                    interface->flags);
        int rss_ipv6_udp = test_bit(FM10K_FLAG_RSS_FIELD_IPV6_UDP,
                                    interface->flags);

        /* RSS does not support anything other than hashing
         * to queues on src and dst IPs and ports
         */
        if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST |
                          RXH_L4_B_0_1 | RXH_L4_B_2_3))
                return -EINVAL;

        switch (nfc->flow_type) {
        case TCP_V4_FLOW:
        case TCP_V6_FLOW:
                if (!(nfc->data & RXH_IP_SRC) ||
                    !(nfc->data & RXH_IP_DST) ||
                    !(nfc->data & RXH_L4_B_0_1) ||
                    !(nfc->data & RXH_L4_B_2_3))
                        return -EINVAL;
                break;
        case UDP_V4_FLOW:
                if (!(nfc->data & RXH_IP_SRC) ||
                    !(nfc->data & RXH_IP_DST))
                        return -EINVAL;
                switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
                case 0:
                        clear_bit(FM10K_FLAG_RSS_FIELD_IPV4_UDP,
                                  interface->flags);
                        break;
                case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
                        set_bit(FM10K_FLAG_RSS_FIELD_IPV4_UDP,
                                interface->flags);
                        break;
                default:
                        return -EINVAL;
                }
                break;
        case UDP_V6_FLOW:
                if (!(nfc->data & RXH_IP_SRC) ||
                    !(nfc->data & RXH_IP_DST))
                        return -EINVAL;
                switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
                case 0:
                        clear_bit(FM10K_FLAG_RSS_FIELD_IPV6_UDP,
                                  interface->flags);
                        break;
                case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
                        set_bit(FM10K_FLAG_RSS_FIELD_IPV6_UDP,
                                interface->flags);
                        break;
                default:
                        return -EINVAL;
                }
                break;
        case AH_ESP_V4_FLOW:
        case AH_V4_FLOW:
        case ESP_V4_FLOW:
        case SCTP_V4_FLOW:
        case AH_ESP_V6_FLOW:
        case AH_V6_FLOW:
        case ESP_V6_FLOW:
        case SCTP_V6_FLOW:
                if (!(nfc->data & RXH_IP_SRC) ||
                    !(nfc->data & RXH_IP_DST) ||
                    (nfc->data & RXH_L4_B_0_1) ||
                    (nfc->data & RXH_L4_B_2_3))
                        return -EINVAL;
                break;
        default:
                return -EINVAL;
        }

        /* If something changed we need to update the MRQC register. Note that
         * test_bit() is guaranteed to return strictly 0 or 1, so testing for
         * equality is safe.
         */
        if ((rss_ipv4_udp != test_bit(FM10K_FLAG_RSS_FIELD_IPV4_UDP,
                                      interface->flags)) ||
            (rss_ipv6_udp != test_bit(FM10K_FLAG_RSS_FIELD_IPV6_UDP,
                                      interface->flags))) {
                struct fm10k_hw *hw = &interface->hw;
                bool warn = false;
                u32 mrqc;

                /* Perform hash on these packet types */
                mrqc = FM10K_MRQC_IPV4 |
                       FM10K_MRQC_TCP_IPV4 |
                       FM10K_MRQC_IPV6 |
                       FM10K_MRQC_TCP_IPV6;

                if (test_bit(FM10K_FLAG_RSS_FIELD_IPV4_UDP,
                             interface->flags)) {
                        mrqc |= FM10K_MRQC_UDP_IPV4;
                        warn = true;
                }
                if (test_bit(FM10K_FLAG_RSS_FIELD_IPV6_UDP,
                             interface->flags)) {
                        mrqc |= FM10K_MRQC_UDP_IPV6;
                        warn = true;
                }

                /* If we enable UDP RSS display a warning that this may cause
                 * fragmented UDP packets to arrive out of order.
                 */
                if (warn)
                        netif_warn(interface, drv, interface->netdev,
                                   "enabling UDP RSS: fragmented packets may arrive out of order to the stack above\n");

                fm10k_write_reg(hw, FM10K_MRQC(0), mrqc);
        }

        return 0;
}

static int fm10k_mbx_test(struct fm10k_intfc *interface, u64 *data)
{
        struct fm10k_hw *hw = &interface->hw;
        struct fm10k_mbx_info *mbx = &hw->mbx;
        u32 attr_flag, test_msg[6];
        unsigned long timeout;
        int err = -EINVAL;

        /* For now this is a VF only feature */
        if (hw->mac.type != fm10k_mac_vf)
                return 0;

        /* loop through both nested and unnested attribute types */
        for (attr_flag = BIT(FM10K_TEST_MSG_UNSET);
             attr_flag < BIT(2 * FM10K_TEST_MSG_NESTED);
             attr_flag += attr_flag) {
                /* generate message to be tested */
                fm10k_tlv_msg_test_create(test_msg, attr_flag);

                fm10k_mbx_lock(interface);
                mbx->test_result = FM10K_NOT_IMPLEMENTED;
                err = mbx->ops.enqueue_tx(hw, mbx, test_msg);
                fm10k_mbx_unlock(interface);

                /* wait up to 1 second for response */
                timeout = jiffies + HZ;
                do {
                        if (err < 0)
                                goto err_out;

                        usleep_range(500, 1000);

                        fm10k_mbx_lock(interface);
                        mbx->ops.process(hw, mbx);
                        fm10k_mbx_unlock(interface);

                        err = mbx->test_result;
                        if (!err)
                                break;
                } while (time_is_after_jiffies(timeout));

                /* reporting errors */
                if (err)
                        goto err_out;
        }

err_out:
        *data = err < 0 ? (attr_flag) : (err > 0);
        return err;
}

static void fm10k_self_test(struct net_device *dev,
                            struct ethtool_test *eth_test, u64 *data)
{
        struct fm10k_intfc *interface = netdev_priv(dev);
        struct fm10k_hw *hw = &interface->hw;

        memset(data, 0, sizeof(*data) * FM10K_TEST_LEN);

        if (FM10K_REMOVED(hw->hw_addr)) {
                netif_err(interface, drv, dev,
                          "Interface removed - test blocked\n");
                eth_test->flags |= ETH_TEST_FL_FAILED;
                return;
        }

        if (fm10k_mbx_test(interface, &data[FM10K_TEST_MBX]))
                eth_test->flags |= ETH_TEST_FL_FAILED;
}

static u32 fm10k_get_priv_flags(struct net_device *netdev)
{
        return 0;
}

static int fm10k_set_priv_flags(struct net_device *netdev, u32 priv_flags)
{
        if (priv_flags >= BIT(FM10K_PRV_FLAG_LEN))
                return -EINVAL;

        return 0;
}

static u32 fm10k_get_reta_size(struct net_device __always_unused *netdev)
{
        return FM10K_RETA_SIZE * FM10K_RETA_ENTRIES_PER_REG;
}

void fm10k_write_reta(struct fm10k_intfc *interface, const u32 *indir)
{
        u16 rss_i = interface->ring_feature[RING_F_RSS].indices;
        struct fm10k_hw *hw = &interface->hw;
        u32 table[4];
        int i, j;

        /* record entries to reta table */
        for (i = 0; i < FM10K_RETA_SIZE; i++) {
                u32 reta, n;

                /* generate a new table if we weren't given one */
                for (j = 0; j < 4; j++) {
                        if (indir)
                                n = indir[4 * i + j];
                        else
                                n = ethtool_rxfh_indir_default(4 * i + j,
                                                               rss_i);

                        table[j] = n;
                }

                reta = table[0] |
                        (table[1] << 8) |
                        (table[2] << 16) |
                        (table[3] << 24);

                if (interface->reta[i] == reta)
                        continue;

                interface->reta[i] = reta;
                fm10k_write_reg(hw, FM10K_RETA(0, i), reta);
        }
}

static int fm10k_get_reta(struct net_device *netdev, u32 *indir)
{
        struct fm10k_intfc *interface = netdev_priv(netdev);
        int i;

        if (!indir)
                return 0;

        for (i = 0; i < FM10K_RETA_SIZE; i++, indir += 4) {
                u32 reta = interface->reta[i];

                indir[0] = (reta << 24) >> 24;
                indir[1] = (reta << 16) >> 24;
                indir[2] = (reta <<  8) >> 24;
                indir[3] = (reta) >> 24;
        }

        return 0;
}

static int fm10k_set_reta(struct net_device *netdev, const u32 *indir)
{
        struct fm10k_intfc *interface = netdev_priv(netdev);
        int i;
        u16 rss_i;

        if (!indir)
                return 0;

        /* Verify user input. */
        rss_i = interface->ring_feature[RING_F_RSS].indices;
        for (i = fm10k_get_reta_size(netdev); i--;) {
                if (indir[i] < rss_i)
                        continue;
                return -EINVAL;
        }

        fm10k_write_reta(interface, indir);

        return 0;
}

static u32 fm10k_get_rssrk_size(struct net_device __always_unused *netdev)
{
        return FM10K_RSSRK_SIZE * FM10K_RSSRK_ENTRIES_PER_REG;
}

static int fm10k_get_rssh(struct net_device *netdev,
                          struct ethtool_rxfh_param *rxfh)
{
        struct fm10k_intfc *interface = netdev_priv(netdev);
        u8 *key = rxfh->key;
        int i, err;

        rxfh->hfunc = ETH_RSS_HASH_TOP;

        err = fm10k_get_reta(netdev, rxfh->indir);
        if (err || !key)
                return err;

        for (i = 0; i < FM10K_RSSRK_SIZE; i++, key += 4)
                *(__le32 *)key = cpu_to_le32(interface->rssrk[i]);

        return 0;
}

static int fm10k_set_rssh(struct net_device *netdev,
                          struct ethtool_rxfh_param *rxfh,
                          struct netlink_ext_ack *extack)
{
        struct fm10k_intfc *interface = netdev_priv(netdev);
        struct fm10k_hw *hw = &interface->hw;
        int i, err;

        /* We do not allow change in unsupported parameters */
        if (rxfh->hfunc != ETH_RSS_HASH_NO_CHANGE &&
            rxfh->hfunc != ETH_RSS_HASH_TOP)
                return -EOPNOTSUPP;

        err = fm10k_set_reta(netdev, rxfh->indir);
        if (err || !rxfh->key)
                return err;

        for (i = 0; i < FM10K_RSSRK_SIZE; i++, rxfh->key += 4) {
                u32 rssrk = le32_to_cpu(*(__le32 *)rxfh->key);

                if (interface->rssrk[i] == rssrk)
                        continue;

                interface->rssrk[i] = rssrk;
                fm10k_write_reg(hw, FM10K_RSSRK(0, i), rssrk);
        }

        return 0;
}

static unsigned int fm10k_max_channels(struct net_device *dev)
{
        struct fm10k_intfc *interface = netdev_priv(dev);
        unsigned int max_combined = interface->hw.mac.max_queues;
        u8 tcs = netdev_get_num_tc(dev);

        /* For QoS report channels per traffic class */
        if (tcs > 1)
                max_combined = BIT((fls(max_combined / tcs) - 1));

        return max_combined;
}

static void fm10k_get_channels(struct net_device *dev,
                               struct ethtool_channels *ch)
{
        struct fm10k_intfc *interface = netdev_priv(dev);

        /* report maximum channels */
        ch->max_combined = fm10k_max_channels(dev);

        /* report info for other vector */
        ch->max_other = NON_Q_VECTORS;
        ch->other_count = ch->max_other;

        /* record RSS queues */
        ch->combined_count = interface->ring_feature[RING_F_RSS].indices;
}

static int fm10k_set_channels(struct net_device *dev,
                              struct ethtool_channels *ch)
{
        struct fm10k_intfc *interface = netdev_priv(dev);
        unsigned int count = ch->combined_count;

        /* verify they are not requesting separate vectors */
        if (!count || ch->rx_count || ch->tx_count)
                return -EINVAL;

        /* verify other_count has not changed */
        if (ch->other_count != NON_Q_VECTORS)
                return -EINVAL;

        /* verify the number of channels does not exceed hardware limits */
        if (count > fm10k_max_channels(dev))
                return -EINVAL;

        interface->ring_feature[RING_F_RSS].limit = count;

        /* use setup TC to update any traffic class queue mapping */
        return fm10k_setup_tc(dev, netdev_get_num_tc(dev));
}

static const struct ethtool_ops fm10k_ethtool_ops = {
        .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
                                     ETHTOOL_COALESCE_USE_ADAPTIVE,
        .get_strings            = fm10k_get_strings,
        .get_sset_count         = fm10k_get_sset_count,
        .get_ethtool_stats      = fm10k_get_ethtool_stats,
        .get_drvinfo            = fm10k_get_drvinfo,
        .get_link               = ethtool_op_get_link,
        .get_pauseparam         = fm10k_get_pauseparam,
        .set_pauseparam         = fm10k_set_pauseparam,
        .get_msglevel           = fm10k_get_msglevel,
        .set_msglevel           = fm10k_set_msglevel,
        .get_ringparam          = fm10k_get_ringparam,
        .set_ringparam          = fm10k_set_ringparam,
        .get_coalesce           = fm10k_get_coalesce,
        .set_coalesce           = fm10k_set_coalesce,
        .get_rx_ring_count      = fm10k_get_rx_ring_count,
        .get_regs               = fm10k_get_regs,
        .get_regs_len           = fm10k_get_regs_len,
        .self_test              = fm10k_self_test,
        .get_priv_flags         = fm10k_get_priv_flags,
        .set_priv_flags         = fm10k_set_priv_flags,
        .get_rxfh_indir_size    = fm10k_get_reta_size,
        .get_rxfh_key_size      = fm10k_get_rssrk_size,
        .get_rxfh               = fm10k_get_rssh,
        .set_rxfh               = fm10k_set_rssh,
        .get_rxfh_fields        = fm10k_get_rssh_fields,
        .set_rxfh_fields        = fm10k_set_rssh_fields,
        .get_channels           = fm10k_get_channels,
        .set_channels           = fm10k_set_channels,
        .get_ts_info            = ethtool_op_get_ts_info,
};

void fm10k_set_ethtool_ops(struct net_device *dev)
{
        dev->ethtool_ops = &fm10k_ethtool_ops;
}