/*
 * Copyright (C) 2015-2017 Netronome Systems, Inc.
 *
 * This software is dual licensed under the GNU General License Version 2,
 * June 1991 as shown in the file COPYING in the top-level directory of this
 * source tree or the BSD 2-Clause License provided below.  You have the
 * option to license this software under the complete terms of either license.
 *
 * The BSD 2-Clause License:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      1. Redistributions of source code must retain the above
 *         copyright notice, this list of conditions and the following
 *         disclaimer.
 *
 *      2. Redistributions in binary form must reproduce the above
 *         copyright notice, this list of conditions and the following
 *         disclaimer in the documentation and/or other materials
 *         provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/*
 * nfp_net_ethtool.c
 * Netronome network device driver: ethtool support
 * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
 *          Jason McMullan <jason.mcmullan@netronome.com>
 *          Rolf Neugebauer <rolf.neugebauer@netronome.com>
 *          Brad Petrus <brad.petrus@netronome.com>
 */

#include <linux/bitfield.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/ethtool.h>

#include "nfpcore/nfp.h"
#include "nfpcore/nfp_nsp.h"
#include "nfp_app.h"
#include "nfp_net_ctrl.h"
#include "nfp_net.h"
#include "nfp_port.h"

enum nfp_dump_diag {
        NFP_DUMP_NSP_DIAG = 0,
};

struct nfp_et_stat {
        char name[ETH_GSTRING_LEN];
        int off;
};

static const struct nfp_et_stat nfp_net_et_stats[] = {
        /* Stats from the device */
        { "dev_rx_discards",    NFP_NET_CFG_STATS_RX_DISCARDS },
        { "dev_rx_errors",      NFP_NET_CFG_STATS_RX_ERRORS },
        { "dev_rx_bytes",       NFP_NET_CFG_STATS_RX_OCTETS },
        { "dev_rx_uc_bytes",    NFP_NET_CFG_STATS_RX_UC_OCTETS },
        { "dev_rx_mc_bytes",    NFP_NET_CFG_STATS_RX_MC_OCTETS },
        { "dev_rx_bc_bytes",    NFP_NET_CFG_STATS_RX_BC_OCTETS },
        { "dev_rx_pkts",        NFP_NET_CFG_STATS_RX_FRAMES },
        { "dev_rx_mc_pkts",     NFP_NET_CFG_STATS_RX_MC_FRAMES },
        { "dev_rx_bc_pkts",     NFP_NET_CFG_STATS_RX_BC_FRAMES },

        { "dev_tx_discards",    NFP_NET_CFG_STATS_TX_DISCARDS },
        { "dev_tx_errors",      NFP_NET_CFG_STATS_TX_ERRORS },
        { "dev_tx_bytes",       NFP_NET_CFG_STATS_TX_OCTETS },
        { "dev_tx_uc_bytes",    NFP_NET_CFG_STATS_TX_UC_OCTETS },
        { "dev_tx_mc_bytes",    NFP_NET_CFG_STATS_TX_MC_OCTETS },
        { "dev_tx_bc_bytes",    NFP_NET_CFG_STATS_TX_BC_OCTETS },
        { "dev_tx_pkts",        NFP_NET_CFG_STATS_TX_FRAMES },
        { "dev_tx_mc_pkts",     NFP_NET_CFG_STATS_TX_MC_FRAMES },
        { "dev_tx_bc_pkts",     NFP_NET_CFG_STATS_TX_BC_FRAMES },

        { "bpf_pass_pkts",      NFP_NET_CFG_STATS_APP0_FRAMES },
        { "bpf_pass_bytes",     NFP_NET_CFG_STATS_APP0_BYTES },
        /* see comments in outro functions in nfp_bpf_jit.c to find out
         * how different BPF modes use app-specific counters
         */
        { "bpf_app1_pkts",      NFP_NET_CFG_STATS_APP1_FRAMES },
        { "bpf_app1_bytes",     NFP_NET_CFG_STATS_APP1_BYTES },
        { "bpf_app2_pkts",      NFP_NET_CFG_STATS_APP2_FRAMES },
        { "bpf_app2_bytes",     NFP_NET_CFG_STATS_APP2_BYTES },
        { "bpf_app3_pkts",      NFP_NET_CFG_STATS_APP3_FRAMES },
        { "bpf_app3_bytes",     NFP_NET_CFG_STATS_APP3_BYTES },
};

static const struct nfp_et_stat nfp_mac_et_stats[] = {
        { "rx_octets",                  NFP_MAC_STATS_RX_IN_OCTETS, },
        { "rx_frame_too_long_errors",
                        NFP_MAC_STATS_RX_FRAME_TOO_LONG_ERRORS, },
        { "rx_range_length_errors",     NFP_MAC_STATS_RX_RANGE_LENGTH_ERRORS, },
        { "rx_vlan_reveive_ok",         NFP_MAC_STATS_RX_VLAN_REVEIVE_OK, },
        { "rx_errors",                  NFP_MAC_STATS_RX_IN_ERRORS, },
        { "rx_broadcast_pkts",          NFP_MAC_STATS_RX_IN_BROADCAST_PKTS, },
        { "rx_drop_events",             NFP_MAC_STATS_RX_DROP_EVENTS, },
        { "rx_alignment_errors",        NFP_MAC_STATS_RX_ALIGNMENT_ERRORS, },
        { "rx_pause_mac_ctrl_frames",
                        NFP_MAC_STATS_RX_PAUSE_MAC_CTRL_FRAMES, },
        { "rx_frames_received_ok",      NFP_MAC_STATS_RX_FRAMES_RECEIVED_OK, },
        { "rx_frame_check_sequence_errors",
                        NFP_MAC_STATS_RX_FRAME_CHECK_SEQUENCE_ERRORS, },
        { "rx_unicast_pkts",            NFP_MAC_STATS_RX_UNICAST_PKTS, },
        { "rx_multicast_pkts",          NFP_MAC_STATS_RX_MULTICAST_PKTS, },
        { "rx_pkts",                    NFP_MAC_STATS_RX_PKTS, },
        { "rx_undersize_pkts",          NFP_MAC_STATS_RX_UNDERSIZE_PKTS, },
        { "rx_pkts_64_octets",          NFP_MAC_STATS_RX_PKTS_64_OCTETS, },
        { "rx_pkts_65_to_127_octets",
                        NFP_MAC_STATS_RX_PKTS_65_TO_127_OCTETS, },
        { "rx_pkts_128_to_255_octets",
                        NFP_MAC_STATS_RX_PKTS_128_TO_255_OCTETS, },
        { "rx_pkts_256_to_511_octets",
                        NFP_MAC_STATS_RX_PKTS_256_TO_511_OCTETS, },
        { "rx_pkts_512_to_1023_octets",
                        NFP_MAC_STATS_RX_PKTS_512_TO_1023_OCTETS, },
        { "rx_pkts_1024_to_1518_octets",
                        NFP_MAC_STATS_RX_PKTS_1024_TO_1518_OCTETS, },
        { "rx_pkts_1519_to_max_octets",
                        NFP_MAC_STATS_RX_PKTS_1519_TO_MAX_OCTETS, },
        { "rx_jabbers",                 NFP_MAC_STATS_RX_JABBERS, },
        { "rx_fragments",               NFP_MAC_STATS_RX_FRAGMENTS, },
        { "rx_oversize_pkts",           NFP_MAC_STATS_RX_OVERSIZE_PKTS, },
        { "rx_pause_frames_class0",     NFP_MAC_STATS_RX_PAUSE_FRAMES_CLASS0, },
        { "rx_pause_frames_class1",     NFP_MAC_STATS_RX_PAUSE_FRAMES_CLASS1, },
        { "rx_pause_frames_class2",     NFP_MAC_STATS_RX_PAUSE_FRAMES_CLASS2, },
        { "rx_pause_frames_class3",     NFP_MAC_STATS_RX_PAUSE_FRAMES_CLASS3, },
        { "rx_pause_frames_class4",     NFP_MAC_STATS_RX_PAUSE_FRAMES_CLASS4, },
        { "rx_pause_frames_class5",     NFP_MAC_STATS_RX_PAUSE_FRAMES_CLASS5, },
        { "rx_pause_frames_class6",     NFP_MAC_STATS_RX_PAUSE_FRAMES_CLASS6, },
        { "rx_pause_frames_class7",     NFP_MAC_STATS_RX_PAUSE_FRAMES_CLASS7, },
        { "rx_mac_ctrl_frames_received",
                        NFP_MAC_STATS_RX_MAC_CTRL_FRAMES_RECEIVED, },
        { "rx_mac_head_drop",           NFP_MAC_STATS_RX_MAC_HEAD_DROP, },
        { "tx_queue_drop",              NFP_MAC_STATS_TX_QUEUE_DROP, },
        { "tx_octets",                  NFP_MAC_STATS_TX_OUT_OCTETS, },
        { "tx_vlan_transmitted_ok",     NFP_MAC_STATS_TX_VLAN_TRANSMITTED_OK, },
        { "tx_errors",                  NFP_MAC_STATS_TX_OUT_ERRORS, },
        { "tx_broadcast_pkts",          NFP_MAC_STATS_TX_BROADCAST_PKTS, },
        { "tx_pause_mac_ctrl_frames",
                        NFP_MAC_STATS_TX_PAUSE_MAC_CTRL_FRAMES, },
        { "tx_frames_transmitted_ok",
                        NFP_MAC_STATS_TX_FRAMES_TRANSMITTED_OK, },
        { "tx_unicast_pkts",            NFP_MAC_STATS_TX_UNICAST_PKTS, },
        { "tx_multicast_pkts",          NFP_MAC_STATS_TX_MULTICAST_PKTS, },
        { "tx_pkts_64_octets",          NFP_MAC_STATS_TX_PKTS_64_OCTETS, },
        { "tx_pkts_65_to_127_octets",
                        NFP_MAC_STATS_TX_PKTS_65_TO_127_OCTETS, },
        { "tx_pkts_128_to_255_octets",
                        NFP_MAC_STATS_TX_PKTS_128_TO_255_OCTETS, },
        { "tx_pkts_256_to_511_octets",
                        NFP_MAC_STATS_TX_PKTS_256_TO_511_OCTETS, },
        { "tx_pkts_512_to_1023_octets",
                        NFP_MAC_STATS_TX_PKTS_512_TO_1023_OCTETS, },
        { "tx_pkts_1024_to_1518_octets",
                        NFP_MAC_STATS_TX_PKTS_1024_TO_1518_OCTETS, },
        { "tx_pkts_1519_to_max_octets",
                        NFP_MAC_STATS_TX_PKTS_1519_TO_MAX_OCTETS, },
        { "tx_pause_frames_class0",     NFP_MAC_STATS_TX_PAUSE_FRAMES_CLASS0, },
        { "tx_pause_frames_class1",     NFP_MAC_STATS_TX_PAUSE_FRAMES_CLASS1, },
        { "tx_pause_frames_class2",     NFP_MAC_STATS_TX_PAUSE_FRAMES_CLASS2, },
        { "tx_pause_frames_class3",     NFP_MAC_STATS_TX_PAUSE_FRAMES_CLASS3, },
        { "tx_pause_frames_class4",     NFP_MAC_STATS_TX_PAUSE_FRAMES_CLASS4, },
        { "tx_pause_frames_class5",     NFP_MAC_STATS_TX_PAUSE_FRAMES_CLASS5, },
        { "tx_pause_frames_class6",     NFP_MAC_STATS_TX_PAUSE_FRAMES_CLASS6, },
        { "tx_pause_frames_class7",     NFP_MAC_STATS_TX_PAUSE_FRAMES_CLASS7, },
};

#define NN_ET_GLOBAL_STATS_LEN ARRAY_SIZE(nfp_net_et_stats)
#define NN_ET_SWITCH_STATS_LEN 9
#define NN_ET_RVEC_GATHER_STATS 7

static void nfp_net_get_nspinfo(struct nfp_app *app, char *version)
{
        struct nfp_nsp *nsp;

        if (!app)
                return;

        nsp = nfp_nsp_open(app->cpp);
        if (IS_ERR(nsp))
                return;

        snprintf(version, ETHTOOL_FWVERS_LEN, "%hu.%hu",
                 nfp_nsp_get_abi_ver_major(nsp),
                 nfp_nsp_get_abi_ver_minor(nsp));

        nfp_nsp_close(nsp);
}

static void
nfp_get_drvinfo(struct nfp_app *app, struct pci_dev *pdev,
                const char *vnic_version, struct ethtool_drvinfo *drvinfo)
{
        char nsp_version[ETHTOOL_FWVERS_LEN] = {};

        strlcpy(drvinfo->driver, pdev->driver->name, sizeof(drvinfo->driver));
        strlcpy(drvinfo->version, nfp_driver_version, sizeof(drvinfo->version));

        nfp_net_get_nspinfo(app, nsp_version);
        snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
                 "%s %s %s %s", vnic_version, nsp_version,
                 nfp_app_mip_name(app), nfp_app_name(app));
}

static void
nfp_net_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo)
{
        char vnic_version[ETHTOOL_FWVERS_LEN] = {};
        struct nfp_net *nn = netdev_priv(netdev);

        snprintf(vnic_version, sizeof(vnic_version), "%d.%d.%d.%d",
                 nn->fw_ver.resv, nn->fw_ver.class,
                 nn->fw_ver.major, nn->fw_ver.minor);
        strlcpy(drvinfo->bus_info, pci_name(nn->pdev),
                sizeof(drvinfo->bus_info));

        nfp_get_drvinfo(nn->app, nn->pdev, vnic_version, drvinfo);
}

static void
nfp_app_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo)
{
        struct nfp_app *app;

        app = nfp_app_from_netdev(netdev);
        if (!app)
                return;

        nfp_get_drvinfo(app, app->pdev, "*", drvinfo);
}

/**
 * nfp_net_get_link_ksettings - Get Link Speed settings
 * @netdev:     network interface device structure
 * @cmd:        ethtool command
 *
 * Reports speed settings based on info in the BAR provided by the fw.
 */
static int
nfp_net_get_link_ksettings(struct net_device *netdev,
                           struct ethtool_link_ksettings *cmd)
{
        static const u32 ls_to_ethtool[] = {
                [NFP_NET_CFG_STS_LINK_RATE_UNSUPPORTED] = 0,
                [NFP_NET_CFG_STS_LINK_RATE_UNKNOWN]     = SPEED_UNKNOWN,
                [NFP_NET_CFG_STS_LINK_RATE_1G]          = SPEED_1000,
                [NFP_NET_CFG_STS_LINK_RATE_10G]         = SPEED_10000,
                [NFP_NET_CFG_STS_LINK_RATE_25G]         = SPEED_25000,
                [NFP_NET_CFG_STS_LINK_RATE_40G]         = SPEED_40000,
                [NFP_NET_CFG_STS_LINK_RATE_50G]         = SPEED_50000,
                [NFP_NET_CFG_STS_LINK_RATE_100G]        = SPEED_100000,
        };
        struct nfp_eth_table_port *eth_port;
        struct nfp_port *port;
        struct nfp_net *nn;
        u32 sts, ls;

        /* Init to unknowns */
        ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
        cmd->base.port = PORT_OTHER;
        cmd->base.speed = SPEED_UNKNOWN;
        cmd->base.duplex = DUPLEX_UNKNOWN;

        port = nfp_port_from_netdev(netdev);
        eth_port = nfp_port_get_eth_port(port);
        if (eth_port)
                cmd->base.autoneg = eth_port->aneg != NFP_ANEG_DISABLED ?
                        AUTONEG_ENABLE : AUTONEG_DISABLE;

        if (!netif_carrier_ok(netdev))
                return 0;

        /* Use link speed from ETH table if available, otherwise try the BAR */
        if (eth_port) {
                cmd->base.port = eth_port->port_type;
                cmd->base.speed = eth_port->speed;
                cmd->base.duplex = DUPLEX_FULL;
                return 0;
        }

        if (!nfp_netdev_is_nfp_net(netdev))
                return -EOPNOTSUPP;
        nn = netdev_priv(netdev);

        sts = nn_readl(nn, NFP_NET_CFG_STS);

        ls = FIELD_GET(NFP_NET_CFG_STS_LINK_RATE, sts);
        if (ls == NFP_NET_CFG_STS_LINK_RATE_UNSUPPORTED)
                return -EOPNOTSUPP;

        if (ls == NFP_NET_CFG_STS_LINK_RATE_UNKNOWN ||
            ls >= ARRAY_SIZE(ls_to_ethtool))
                return 0;

        cmd->base.speed = ls_to_ethtool[sts];
        cmd->base.duplex = DUPLEX_FULL;

        return 0;
}

static int
nfp_net_set_link_ksettings(struct net_device *netdev,
                           const struct ethtool_link_ksettings *cmd)
{
        struct nfp_eth_table_port *eth_port;
        struct nfp_port *port;
        struct nfp_nsp *nsp;
        int err;

        port = nfp_port_from_netdev(netdev);
        eth_port = __nfp_port_get_eth_port(port);
        if (!eth_port)
                return -EOPNOTSUPP;

        if (netif_running(netdev)) {
                netdev_warn(netdev, "Changing settings not allowed on an active interface. It may cause the port to be disabled until reboot.\n");
                return -EBUSY;
        }

        nsp = nfp_eth_config_start(port->app->cpp, eth_port->index);
        if (IS_ERR(nsp))
                return PTR_ERR(nsp);

        err = __nfp_eth_set_aneg(nsp, cmd->base.autoneg == AUTONEG_ENABLE ?
                                 NFP_ANEG_AUTO : NFP_ANEG_DISABLED);
        if (err)
                goto err_bad_set;
        if (cmd->base.speed != SPEED_UNKNOWN) {
                u32 speed = cmd->base.speed / eth_port->lanes;

                err = __nfp_eth_set_speed(nsp, speed);
                if (err)
                        goto err_bad_set;
        }

        err = nfp_eth_config_commit_end(nsp);
        if (err > 0)
                return 0; /* no change */

        nfp_net_refresh_port_table(port);

        return err;

err_bad_set:
        nfp_eth_config_cleanup_end(nsp);
        return err;
}

static void nfp_net_get_ringparam(struct net_device *netdev,
                                  struct ethtool_ringparam *ring)
{
        struct nfp_net *nn = netdev_priv(netdev);

        ring->rx_max_pending = NFP_NET_MAX_RX_DESCS;
        ring->tx_max_pending = NFP_NET_MAX_TX_DESCS;
        ring->rx_pending = nn->dp.rxd_cnt;
        ring->tx_pending = nn->dp.txd_cnt;
}

static int nfp_net_set_ring_size(struct nfp_net *nn, u32 rxd_cnt, u32 txd_cnt)
{
        struct nfp_net_dp *dp;

        dp = nfp_net_clone_dp(nn);
        if (!dp)
                return -ENOMEM;

        dp->rxd_cnt = rxd_cnt;
        dp->txd_cnt = txd_cnt;

        return nfp_net_ring_reconfig(nn, dp, NULL);
}

static int nfp_net_set_ringparam(struct net_device *netdev,
                                 struct ethtool_ringparam *ring)
{
        struct nfp_net *nn = netdev_priv(netdev);
        u32 rxd_cnt, txd_cnt;

        /* We don't have separate queues/rings for small/large frames. */
        if (ring->rx_mini_pending || ring->rx_jumbo_pending)
                return -EINVAL;

        /* Round up to supported values */
        rxd_cnt = roundup_pow_of_two(ring->rx_pending);
        txd_cnt = roundup_pow_of_two(ring->tx_pending);

        if (rxd_cnt < NFP_NET_MIN_RX_DESCS || rxd_cnt > NFP_NET_MAX_RX_DESCS ||
            txd_cnt < NFP_NET_MIN_TX_DESCS || txd_cnt > NFP_NET_MAX_TX_DESCS)
                return -EINVAL;

        if (nn->dp.rxd_cnt == rxd_cnt && nn->dp.txd_cnt == txd_cnt)
                return 0;

        nn_dbg(nn, "Change ring size: RxQ %u->%u, TxQ %u->%u\n",
               nn->dp.rxd_cnt, rxd_cnt, nn->dp.txd_cnt, txd_cnt);

        return nfp_net_set_ring_size(nn, rxd_cnt, txd_cnt);
}

static __printf(2, 3) u8 *nfp_pr_et(u8 *data, const char *fmt, ...)
{
        va_list args;

        va_start(args, fmt);
        vsnprintf(data, ETH_GSTRING_LEN, fmt, args);
        va_end(args);

        return data + ETH_GSTRING_LEN;
}

static unsigned int nfp_vnic_get_sw_stats_count(struct net_device *netdev)
{
        struct nfp_net *nn = netdev_priv(netdev);

        return NN_ET_RVEC_GATHER_STATS + nn->dp.num_r_vecs * 3;
}

static u8 *nfp_vnic_get_sw_stats_strings(struct net_device *netdev, u8 *data)
{
        struct nfp_net *nn = netdev_priv(netdev);
        int i;

        for (i = 0; i < nn->dp.num_r_vecs; i++) {
                data = nfp_pr_et(data, "rvec_%u_rx_pkts", i);
                data = nfp_pr_et(data, "rvec_%u_tx_pkts", i);
                data = nfp_pr_et(data, "rvec_%u_tx_busy", i);
        }

        data = nfp_pr_et(data, "hw_rx_csum_ok");
        data = nfp_pr_et(data, "hw_rx_csum_inner_ok");
        data = nfp_pr_et(data, "hw_rx_csum_err");
        data = nfp_pr_et(data, "hw_tx_csum");
        data = nfp_pr_et(data, "hw_tx_inner_csum");
        data = nfp_pr_et(data, "tx_gather");
        data = nfp_pr_et(data, "tx_lso");

        return data;
}

static u64 *nfp_vnic_get_sw_stats(struct net_device *netdev, u64 *data)
{
        u64 gathered_stats[NN_ET_RVEC_GATHER_STATS] = {};
        struct nfp_net *nn = netdev_priv(netdev);
        u64 tmp[NN_ET_RVEC_GATHER_STATS];
        unsigned int i, j;

        for (i = 0; i < nn->dp.num_r_vecs; i++) {
                unsigned int start;

                do {
                        start = u64_stats_fetch_begin(&nn->r_vecs[i].rx_sync);
                        data[0] = nn->r_vecs[i].rx_pkts;
                        tmp[0] = nn->r_vecs[i].hw_csum_rx_ok;
                        tmp[1] = nn->r_vecs[i].hw_csum_rx_inner_ok;
                        tmp[2] = nn->r_vecs[i].hw_csum_rx_error;
                } while (u64_stats_fetch_retry(&nn->r_vecs[i].rx_sync, start));

                do {
                        start = u64_stats_fetch_begin(&nn->r_vecs[i].tx_sync);
                        data[1] = nn->r_vecs[i].tx_pkts;
                        data[2] = nn->r_vecs[i].tx_busy;
                        tmp[3] = nn->r_vecs[i].hw_csum_tx;
                        tmp[4] = nn->r_vecs[i].hw_csum_tx_inner;
                        tmp[5] = nn->r_vecs[i].tx_gather;
                        tmp[6] = nn->r_vecs[i].tx_lso;
                } while (u64_stats_fetch_retry(&nn->r_vecs[i].tx_sync, start));

                data += 3;

                for (j = 0; j < NN_ET_RVEC_GATHER_STATS; j++)
                        gathered_stats[j] += tmp[j];
        }

        for (j = 0; j < NN_ET_RVEC_GATHER_STATS; j++)
                *data++ = gathered_stats[j];

        return data;
}

static unsigned int
nfp_vnic_get_hw_stats_count(unsigned int rx_rings, unsigned int tx_rings)
{
        return NN_ET_GLOBAL_STATS_LEN + (rx_rings + tx_rings) * 2;
}

static u8 *
nfp_vnic_get_hw_stats_strings(u8 *data, unsigned int rx_rings,
                              unsigned int tx_rings, bool repr)
{
        int swap_off, i;

        BUILD_BUG_ON(NN_ET_GLOBAL_STATS_LEN < NN_ET_SWITCH_STATS_LEN * 2);
        /* If repr is true first add SWITCH_STATS_LEN and then subtract it
         * effectively swapping the RX and TX statistics (giving us the RX
         * and TX from perspective of the switch).
         */
        swap_off = repr * NN_ET_SWITCH_STATS_LEN;

        for (i = 0; i < NN_ET_SWITCH_STATS_LEN; i++)
                data = nfp_pr_et(data, nfp_net_et_stats[i + swap_off].name);

        for (i = NN_ET_SWITCH_STATS_LEN; i < NN_ET_SWITCH_STATS_LEN * 2; i++)
                data = nfp_pr_et(data, nfp_net_et_stats[i - swap_off].name);

        for (i = NN_ET_SWITCH_STATS_LEN * 2; i < NN_ET_GLOBAL_STATS_LEN; i++)
                data = nfp_pr_et(data, nfp_net_et_stats[i].name);

        for (i = 0; i < tx_rings; i++) {
                data = nfp_pr_et(data, "txq_%u_pkts", i);
                data = nfp_pr_et(data, "txq_%u_bytes", i);
        }

        for (i = 0; i < rx_rings; i++) {
                data = nfp_pr_et(data, "rxq_%u_pkts", i);
                data = nfp_pr_et(data, "rxq_%u_bytes", i);
        }

        return data;
}

static u64 *
nfp_vnic_get_hw_stats(u64 *data, u8 __iomem *mem,
                      unsigned int rx_rings, unsigned int tx_rings)
{
        unsigned int i;

        for (i = 0; i < NN_ET_GLOBAL_STATS_LEN; i++)
                *data++ = readq(mem + nfp_net_et_stats[i].off);

        for (i = 0; i < tx_rings; i++) {
                *data++ = readq(mem + NFP_NET_CFG_TXR_STATS(i));
                *data++ = readq(mem + NFP_NET_CFG_TXR_STATS(i) + 8);
        }

        for (i = 0; i < rx_rings; i++) {
                *data++ = readq(mem + NFP_NET_CFG_RXR_STATS(i));
                *data++ = readq(mem + NFP_NET_CFG_RXR_STATS(i) + 8);
        }

        return data;
}

static unsigned int nfp_mac_get_stats_count(struct net_device *netdev)
{
        struct nfp_port *port;

        port = nfp_port_from_netdev(netdev);
        if (!__nfp_port_get_eth_port(port) || !port->eth_stats)
                return 0;

        return ARRAY_SIZE(nfp_mac_et_stats);
}

static u8 *nfp_mac_get_stats_strings(struct net_device *netdev, u8 *data)
{
        struct nfp_port *port;
        unsigned int i;

        port = nfp_port_from_netdev(netdev);
        if (!__nfp_port_get_eth_port(port) || !port->eth_stats)
                return data;

        for (i = 0; i < ARRAY_SIZE(nfp_mac_et_stats); i++)
                data = nfp_pr_et(data, "mac.%s", nfp_mac_et_stats[i].name);

        return data;
}

static u64 *nfp_mac_get_stats(struct net_device *netdev, u64 *data)
{
        struct nfp_port *port;
        unsigned int i;

        port = nfp_port_from_netdev(netdev);
        if (!__nfp_port_get_eth_port(port) || !port->eth_stats)
                return data;

        for (i = 0; i < ARRAY_SIZE(nfp_mac_et_stats); i++)
                *data++ = readq(port->eth_stats + nfp_mac_et_stats[i].off);

        return data;
}

static void nfp_net_get_strings(struct net_device *netdev,
                                u32 stringset, u8 *data)
{
        struct nfp_net *nn = netdev_priv(netdev);

        switch (stringset) {
        case ETH_SS_STATS:
                data = nfp_vnic_get_sw_stats_strings(netdev, data);
                data = nfp_vnic_get_hw_stats_strings(data, nn->dp.num_rx_rings,
                                                     nn->dp.num_tx_rings,
                                                     false);
                data = nfp_mac_get_stats_strings(netdev, data);
                break;
        }
}

static void
nfp_net_get_stats(struct net_device *netdev, struct ethtool_stats *stats,
                  u64 *data)
{
        struct nfp_net *nn = netdev_priv(netdev);

        data = nfp_vnic_get_sw_stats(netdev, data);
        data = nfp_vnic_get_hw_stats(data, nn->dp.ctrl_bar,
                                     nn->dp.num_rx_rings, nn->dp.num_tx_rings);
        data = nfp_mac_get_stats(netdev, data);
}

static int nfp_net_get_sset_count(struct net_device *netdev, int sset)
{
        struct nfp_net *nn = netdev_priv(netdev);

        switch (sset) {
        case ETH_SS_STATS:
                return nfp_vnic_get_sw_stats_count(netdev) +
                       nfp_vnic_get_hw_stats_count(nn->dp.num_rx_rings,
                                                   nn->dp.num_tx_rings) +
                       nfp_mac_get_stats_count(netdev);
        default:
                return -EOPNOTSUPP;
        }
}

static void nfp_port_get_strings(struct net_device *netdev,
                                 u32 stringset, u8 *data)
{
        struct nfp_port *port = nfp_port_from_netdev(netdev);

        switch (stringset) {
        case ETH_SS_STATS:
                if (nfp_port_is_vnic(port))
                        data = nfp_vnic_get_hw_stats_strings(data, 0, 0, true);
                else
                        data = nfp_mac_get_stats_strings(netdev, data);
                break;
        }
}

static void
nfp_port_get_stats(struct net_device *netdev, struct ethtool_stats *stats,
                   u64 *data)
{
        struct nfp_port *port = nfp_port_from_netdev(netdev);

        if (nfp_port_is_vnic(port))
                data = nfp_vnic_get_hw_stats(data, port->vnic, 0, 0);
        else
                data = nfp_mac_get_stats(netdev, data);
}

static int nfp_port_get_sset_count(struct net_device *netdev, int sset)
{
        struct nfp_port *port = nfp_port_from_netdev(netdev);
        unsigned int count;

        switch (sset) {
        case ETH_SS_STATS:
                if (nfp_port_is_vnic(port))
                        count = nfp_vnic_get_hw_stats_count(0, 0);
                else
                        count = nfp_mac_get_stats_count(netdev);
                return count;
        default:
                return -EOPNOTSUPP;
        }
}

/* RX network flow classification (RSS, filters, etc)
 */
static u32 ethtool_flow_to_nfp_flag(u32 flow_type)
{
        static const u32 xlate_ethtool_to_nfp[IPV6_FLOW + 1] = {
                [TCP_V4_FLOW]   = NFP_NET_CFG_RSS_IPV4_TCP,
                [TCP_V6_FLOW]   = NFP_NET_CFG_RSS_IPV6_TCP,
                [UDP_V4_FLOW]   = NFP_NET_CFG_RSS_IPV4_UDP,
                [UDP_V6_FLOW]   = NFP_NET_CFG_RSS_IPV6_UDP,
                [IPV4_FLOW]     = NFP_NET_CFG_RSS_IPV4,
                [IPV6_FLOW]     = NFP_NET_CFG_RSS_IPV6,
        };

        if (flow_type >= ARRAY_SIZE(xlate_ethtool_to_nfp))
                return 0;

        return xlate_ethtool_to_nfp[flow_type];
}

static int nfp_net_get_rss_hash_opts(struct nfp_net *nn,
                                     struct ethtool_rxnfc *cmd)
{
        u32 nfp_rss_flag;

        cmd->data = 0;

        if (!(nn->cap & NFP_NET_CFG_CTRL_RSS_ANY))
                return -EOPNOTSUPP;

        nfp_rss_flag = ethtool_flow_to_nfp_flag(cmd->flow_type);
        if (!nfp_rss_flag)
                return -EINVAL;

        cmd->data |= RXH_IP_SRC | RXH_IP_DST;
        if (nn->rss_cfg & nfp_rss_flag)
                cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;

        return 0;
}

static int nfp_net_get_rxnfc(struct net_device *netdev,
                             struct ethtool_rxnfc *cmd, u32 *rule_locs)
{
        struct nfp_net *nn = netdev_priv(netdev);

        switch (cmd->cmd) {
        case ETHTOOL_GRXRINGS:
                cmd->data = nn->dp.num_rx_rings;
                return 0;
        case ETHTOOL_GRXFH:
                return nfp_net_get_rss_hash_opts(nn, cmd);
        default:
                return -EOPNOTSUPP;
        }
}

static int nfp_net_set_rss_hash_opt(struct nfp_net *nn,
                                    struct ethtool_rxnfc *nfc)
{
        u32 new_rss_cfg = nn->rss_cfg;
        u32 nfp_rss_flag;
        int err;

        if (!(nn->cap & NFP_NET_CFG_CTRL_RSS_ANY))
                return -EOPNOTSUPP;

        /* RSS only supports IP SA/DA and L4 src/dst ports  */
        if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST |
                          RXH_L4_B_0_1 | RXH_L4_B_2_3))
                return -EINVAL;

        /* We need at least the IP SA/DA fields for hashing */
        if (!(nfc->data & RXH_IP_SRC) ||
            !(nfc->data & RXH_IP_DST))
                return -EINVAL;

        nfp_rss_flag = ethtool_flow_to_nfp_flag(nfc->flow_type);
        if (!nfp_rss_flag)
                return -EINVAL;

        switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
        case 0:
                new_rss_cfg &= ~nfp_rss_flag;
                break;
        case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
                new_rss_cfg |= nfp_rss_flag;
                break;
        default:
                return -EINVAL;
        }

        new_rss_cfg |= FIELD_PREP(NFP_NET_CFG_RSS_HFUNC, nn->rss_hfunc);
        new_rss_cfg |= NFP_NET_CFG_RSS_MASK;

        if (new_rss_cfg == nn->rss_cfg)
                return 0;

        writel(new_rss_cfg, nn->dp.ctrl_bar + NFP_NET_CFG_RSS_CTRL);
        err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS);
        if (err)
                return err;

        nn->rss_cfg = new_rss_cfg;

        nn_dbg(nn, "Changed RSS config to 0x%x\n", nn->rss_cfg);
        return 0;
}

static int nfp_net_set_rxnfc(struct net_device *netdev,
                             struct ethtool_rxnfc *cmd)
{
        struct nfp_net *nn = netdev_priv(netdev);

        switch (cmd->cmd) {
        case ETHTOOL_SRXFH:
                return nfp_net_set_rss_hash_opt(nn, cmd);
        default:
                return -EOPNOTSUPP;
        }
}

static u32 nfp_net_get_rxfh_indir_size(struct net_device *netdev)
{
        struct nfp_net *nn = netdev_priv(netdev);

        if (!(nn->cap & NFP_NET_CFG_CTRL_RSS_ANY))
                return 0;

        return ARRAY_SIZE(nn->rss_itbl);
}

static u32 nfp_net_get_rxfh_key_size(struct net_device *netdev)
{
        struct nfp_net *nn = netdev_priv(netdev);

        if (!(nn->cap & NFP_NET_CFG_CTRL_RSS_ANY))
                return -EOPNOTSUPP;

        return nfp_net_rss_key_sz(nn);
}

static int nfp_net_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
                            u8 *hfunc)
{
        struct nfp_net *nn = netdev_priv(netdev);
        int i;

        if (!(nn->cap & NFP_NET_CFG_CTRL_RSS_ANY))
                return -EOPNOTSUPP;

        if (indir)
                for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++)
                        indir[i] = nn->rss_itbl[i];
        if (key)
                memcpy(key, nn->rss_key, nfp_net_rss_key_sz(nn));
        if (hfunc) {
                *hfunc = nn->rss_hfunc;
                if (*hfunc >= 1 << ETH_RSS_HASH_FUNCS_COUNT)
                        *hfunc = ETH_RSS_HASH_UNKNOWN;
        }

        return 0;
}

static int nfp_net_set_rxfh(struct net_device *netdev,
                            const u32 *indir, const u8 *key,
                            const u8 hfunc)
{
        struct nfp_net *nn = netdev_priv(netdev);
        int i;

        if (!(nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) ||
            !(hfunc == ETH_RSS_HASH_NO_CHANGE || hfunc == nn->rss_hfunc))
                return -EOPNOTSUPP;

        if (!key && !indir)
                return 0;

        if (key) {
                memcpy(nn->rss_key, key, nfp_net_rss_key_sz(nn));
                nfp_net_rss_write_key(nn);
        }
        if (indir) {
                for (i = 0; i < ARRAY_SIZE(nn->rss_itbl); i++)
                        nn->rss_itbl[i] = indir[i];

                nfp_net_rss_write_itbl(nn);
        }

        return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RSS);
}

/* Dump BAR registers
 */
static int nfp_net_get_regs_len(struct net_device *netdev)
{
        return NFP_NET_CFG_BAR_SZ;
}

static void nfp_net_get_regs(struct net_device *netdev,
                             struct ethtool_regs *regs, void *p)
{
        struct nfp_net *nn = netdev_priv(netdev);
        u32 *regs_buf = p;
        int i;

        regs->version = nn_readl(nn, NFP_NET_CFG_VERSION);

        for (i = 0; i < NFP_NET_CFG_BAR_SZ / sizeof(u32); i++)
                regs_buf[i] = readl(nn->dp.ctrl_bar + (i * sizeof(u32)));
}

static int nfp_net_get_coalesce(struct net_device *netdev,
                                struct ethtool_coalesce *ec)
{
        struct nfp_net *nn = netdev_priv(netdev);

        if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD))
                return -EINVAL;

        ec->rx_coalesce_usecs       = nn->rx_coalesce_usecs;
        ec->rx_max_coalesced_frames = nn->rx_coalesce_max_frames;
        ec->tx_coalesce_usecs       = nn->tx_coalesce_usecs;
        ec->tx_max_coalesced_frames = nn->tx_coalesce_max_frames;

        return 0;
}

/* Other debug dumps
 */
static int
nfp_dump_nsp_diag(struct nfp_app *app, struct ethtool_dump *dump, void *buffer)
{
        struct nfp_resource *res;
        int ret;

        if (!app)
                return -EOPNOTSUPP;

        dump->version = 1;
        dump->flag = NFP_DUMP_NSP_DIAG;

        res = nfp_resource_acquire(app->cpp, NFP_RESOURCE_NSP_DIAG);
        if (IS_ERR(res))
                return PTR_ERR(res);

        if (buffer) {
                if (dump->len != nfp_resource_size(res)) {
                        ret = -EINVAL;
                        goto exit_release;
                }

                ret = nfp_cpp_read(app->cpp, nfp_resource_cpp_id(res),
                                   nfp_resource_address(res),
                                   buffer, dump->len);
                if (ret != dump->len)
                        ret = ret < 0 ? ret : -EIO;
                else
                        ret = 0;
        } else {
                dump->len = nfp_resource_size(res);
                ret = 0;
        }
exit_release:
        nfp_resource_release(res);

        return ret;
}

static int nfp_app_set_dump(struct net_device *netdev, struct ethtool_dump *val)
{
        struct nfp_app *app = nfp_app_from_netdev(netdev);

        if (!app)
                return -EOPNOTSUPP;

        if (val->flag != NFP_DUMP_NSP_DIAG)
                return -EINVAL;

        return 0;
}

static int
nfp_app_get_dump_flag(struct net_device *netdev, struct ethtool_dump *dump)
{
        return nfp_dump_nsp_diag(nfp_app_from_netdev(netdev), dump, NULL);
}

static int
nfp_app_get_dump_data(struct net_device *netdev, struct ethtool_dump *dump,
                      void *buffer)
{
        return nfp_dump_nsp_diag(nfp_app_from_netdev(netdev), dump, buffer);
}

static int nfp_net_set_coalesce(struct net_device *netdev,
                                struct ethtool_coalesce *ec)
{
        struct nfp_net *nn = netdev_priv(netdev);
        unsigned int factor;

        if (ec->rx_coalesce_usecs_irq ||
            ec->rx_max_coalesced_frames_irq ||
            ec->tx_coalesce_usecs_irq ||
            ec->tx_max_coalesced_frames_irq ||
            ec->stats_block_coalesce_usecs ||
            ec->use_adaptive_rx_coalesce ||
            ec->use_adaptive_tx_coalesce ||
            ec->pkt_rate_low ||
            ec->rx_coalesce_usecs_low ||
            ec->rx_max_coalesced_frames_low ||
            ec->tx_coalesce_usecs_low ||
            ec->tx_max_coalesced_frames_low ||
            ec->pkt_rate_high ||
            ec->rx_coalesce_usecs_high ||

            ec->rx_max_coalesced_frames_high ||
            ec->tx_coalesce_usecs_high ||
            ec->tx_max_coalesced_frames_high ||
            ec->rate_sample_interval)
                return -EOPNOTSUPP;

        /* Compute factor used to convert coalesce '_usecs' parameters to
         * ME timestamp ticks.  There are 16 ME clock cycles for each timestamp
         * count.
         */
        factor = nn->me_freq_mhz / 16;

        /* Each pair of (usecs, max_frames) fields specifies that interrupts
         * should be coalesced until
         *      (usecs > 0 && time_since_first_completion >= usecs) ||
         *      (max_frames > 0 && completed_frames >= max_frames)
         *
         * It is illegal to set both usecs and max_frames to zero as this would
         * cause interrupts to never be generated.  To disable coalescing, set
         * usecs = 0 and max_frames = 1.
         *
         * Some implementations ignore the value of max_frames and use the
         * condition time_since_first_completion >= usecs
         */

        if (!(nn->cap & NFP_NET_CFG_CTRL_IRQMOD))
                return -EINVAL;

        /* ensure valid configuration */
        if (!ec->rx_coalesce_usecs && !ec->rx_max_coalesced_frames)
                return -EINVAL;

        if (!ec->tx_coalesce_usecs && !ec->tx_max_coalesced_frames)
                return -EINVAL;

        if (ec->rx_coalesce_usecs * factor >= ((1 << 16) - 1))
                return -EINVAL;

        if (ec->tx_coalesce_usecs * factor >= ((1 << 16) - 1))
                return -EINVAL;

        if (ec->rx_max_coalesced_frames >= ((1 << 16) - 1))
                return -EINVAL;

        if (ec->tx_max_coalesced_frames >= ((1 << 16) - 1))
                return -EINVAL;

        /* configuration is valid */
        nn->rx_coalesce_usecs      = ec->rx_coalesce_usecs;
        nn->rx_coalesce_max_frames = ec->rx_max_coalesced_frames;
        nn->tx_coalesce_usecs      = ec->tx_coalesce_usecs;
        nn->tx_coalesce_max_frames = ec->tx_max_coalesced_frames;

        /* write configuration to device */
        nfp_net_coalesce_write_cfg(nn);
        return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
}

static void nfp_net_get_channels(struct net_device *netdev,
                                 struct ethtool_channels *channel)
{
        struct nfp_net *nn = netdev_priv(netdev);
        unsigned int num_tx_rings;

        num_tx_rings = nn->dp.num_tx_rings;
        if (nn->dp.xdp_prog)
                num_tx_rings -= nn->dp.num_rx_rings;

        channel->max_rx = min(nn->max_rx_rings, nn->max_r_vecs);
        channel->max_tx = min(nn->max_tx_rings, nn->max_r_vecs);
        channel->max_combined = min(channel->max_rx, channel->max_tx);
        channel->max_other = NFP_NET_NON_Q_VECTORS;
        channel->combined_count = min(nn->dp.num_rx_rings, num_tx_rings);
        channel->rx_count = nn->dp.num_rx_rings - channel->combined_count;
        channel->tx_count = num_tx_rings - channel->combined_count;
        channel->other_count = NFP_NET_NON_Q_VECTORS;
}

static int nfp_net_set_num_rings(struct nfp_net *nn, unsigned int total_rx,
                                 unsigned int total_tx)
{
        struct nfp_net_dp *dp;

        dp = nfp_net_clone_dp(nn);
        if (!dp)
                return -ENOMEM;

        dp->num_rx_rings = total_rx;
        dp->num_tx_rings = total_tx;
        /* nfp_net_check_config() will catch num_tx_rings > nn->max_tx_rings */
        if (dp->xdp_prog)
                dp->num_tx_rings += total_rx;

        return nfp_net_ring_reconfig(nn, dp, NULL);
}

static int nfp_net_set_channels(struct net_device *netdev,
                                struct ethtool_channels *channel)
{
        struct nfp_net *nn = netdev_priv(netdev);
        unsigned int total_rx, total_tx;

        /* Reject unsupported */
        if (!channel->combined_count ||
            channel->other_count != NFP_NET_NON_Q_VECTORS ||
            (channel->rx_count && channel->tx_count))
                return -EINVAL;

        total_rx = channel->combined_count + channel->rx_count;
        total_tx = channel->combined_count + channel->tx_count;

        if (total_rx > min(nn->max_rx_rings, nn->max_r_vecs) ||
            total_tx > min(nn->max_tx_rings, nn->max_r_vecs))
                return -EINVAL;

        return nfp_net_set_num_rings(nn, total_rx, total_tx);
}

static const struct ethtool_ops nfp_net_ethtool_ops = {
        .get_drvinfo            = nfp_net_get_drvinfo,
        .get_link               = ethtool_op_get_link,
        .get_ringparam          = nfp_net_get_ringparam,
        .set_ringparam          = nfp_net_set_ringparam,
        .get_strings            = nfp_net_get_strings,
        .get_ethtool_stats      = nfp_net_get_stats,
        .get_sset_count         = nfp_net_get_sset_count,
        .get_rxnfc              = nfp_net_get_rxnfc,
        .set_rxnfc              = nfp_net_set_rxnfc,
        .get_rxfh_indir_size    = nfp_net_get_rxfh_indir_size,
        .get_rxfh_key_size      = nfp_net_get_rxfh_key_size,
        .get_rxfh               = nfp_net_get_rxfh,
        .set_rxfh               = nfp_net_set_rxfh,
        .get_regs_len           = nfp_net_get_regs_len,
        .get_regs               = nfp_net_get_regs,
        .set_dump               = nfp_app_set_dump,
        .get_dump_flag          = nfp_app_get_dump_flag,
        .get_dump_data          = nfp_app_get_dump_data,
        .get_coalesce           = nfp_net_get_coalesce,
        .set_coalesce           = nfp_net_set_coalesce,
        .get_channels           = nfp_net_get_channels,
        .set_channels           = nfp_net_set_channels,
        .get_link_ksettings     = nfp_net_get_link_ksettings,
        .set_link_ksettings     = nfp_net_set_link_ksettings,
};

const struct ethtool_ops nfp_port_ethtool_ops = {
        .get_drvinfo            = nfp_app_get_drvinfo,
        .get_link               = ethtool_op_get_link,
        .get_strings            = nfp_port_get_strings,
        .get_ethtool_stats      = nfp_port_get_stats,
        .get_sset_count         = nfp_port_get_sset_count,
        .set_dump               = nfp_app_set_dump,
        .get_dump_flag          = nfp_app_get_dump_flag,
        .get_dump_data          = nfp_app_get_dump_data,
};

void nfp_net_set_ethtool_ops(struct net_device *netdev)
{
        netdev->ethtool_ops = &nfp_net_ethtool_ops;
}