text: // SPDX-License-Identifier: GPL-2.0
  /* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
  
  #include <linux/module.h>
  #include <linux/netdevice.h>
  #include <linux/sfp.h>
  
  #include "ionic.h"
  #include "ionic_bus.h"
  #include "ionic_lif.h"
  #include "ionic_ethtool.h"
  #include "ionic_stats.h"
  
  static const char ionic_priv_flags_strings[][ETH_GSTRING_LEN] = {
  #define IONIC_PRIV_F_SW_DBG_STATS	BIT(0)
  	"sw-dbg-stats",
  };
  
  #define IONIC_PRIV_FLAGS_COUNT ARRAY_SIZE(ionic_priv_flags_strings)
  
  static void ionic_get_stats_strings(struct ionic_lif *lif, u8 *buf)
  {
  	u32 i;
  
  	for (i = 0; i < ionic_num_stats_grps; i++)
  		ionic_stats_groups[i].get_strings(lif, &buf);
  }
  
  static void ionic_get_stats(struct net_device *netdev,
  			    struct ethtool_stats *stats, u64 *buf)
  {
  	struct ionic_lif *lif;
  	u32 i;
  
  	lif = netdev_priv(netdev);
  
  	memset(buf, 0, stats->n_stats * sizeof(*buf));
  	for (i = 0; i < ionic_num_stats_grps; i++)
  		ionic_stats_groups[i].get_values(lif, &buf);
  }
  
  static int ionic_get_stats_count(struct ionic_lif *lif)
  {
  	int i, num_stats = 0;
  
  	for (i = 0; i < ionic_num_stats_grps; i++)
  		num_stats += ionic_stats_groups[i].get_count(lif);
  
  	return num_stats;
  }
  
  static int ionic_get_sset_count(struct net_device *netdev, int sset)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	int count = 0;
  
  	switch (sset) {
  	case ETH_SS_STATS:
  		count = ionic_get_stats_count(lif);
  		break;
  	case ETH_SS_PRIV_FLAGS:
  		count = IONIC_PRIV_FLAGS_COUNT;
  		break;
  	}
  	return count;
  }
  
  static void ionic_get_strings(struct net_device *netdev,
  			      u32 sset, u8 *buf)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  
  	switch (sset) {
  	case ETH_SS_STATS:
  		ionic_get_stats_strings(lif, buf);
  		break;
  	case ETH_SS_PRIV_FLAGS:
  		memcpy(buf, ionic_priv_flags_strings,
  		       IONIC_PRIV_FLAGS_COUNT * ETH_GSTRING_LEN);
  		break;
  	}
  }
  
  static void ionic_get_drvinfo(struct net_device *netdev,
  			      struct ethtool_drvinfo *drvinfo)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	struct ionic *ionic = lif->ionic;
  
  	strlcpy(drvinfo->driver, IONIC_DRV_NAME, sizeof(drvinfo->driver));
  	strlcpy(drvinfo->fw_version, ionic->idev.dev_info.fw_version,
  		sizeof(drvinfo->fw_version));
  	strlcpy(drvinfo->bus_info, ionic_bus_info(ionic),
  		sizeof(drvinfo->bus_info));
  }
  
  static int ionic_get_regs_len(struct net_device *netdev)
  {
  	return (IONIC_DEV_INFO_REG_COUNT + IONIC_DEV_CMD_REG_COUNT) * sizeof(u32);
  }
  
  static void ionic_get_regs(struct net_device *netdev, struct ethtool_regs *regs,
  			   void *p)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	unsigned int offset;
  	unsigned int size;
  
  	regs->version = IONIC_DEV_CMD_REG_VERSION;
  
  	offset = 0;
  	size = IONIC_DEV_INFO_REG_COUNT * sizeof(u32);
  	memcpy_fromio(p + offset, lif->ionic->idev.dev_info_regs->words, size);
  
  	offset += size;
  	size = IONIC_DEV_CMD_REG_COUNT * sizeof(u32);
  	memcpy_fromio(p + offset, lif->ionic->idev.dev_cmd_regs->words, size);
  }
  
  static int ionic_get_link_ksettings(struct net_device *netdev,
  				    struct ethtool_link_ksettings *ks)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	struct ionic_dev *idev = &lif->ionic->idev;
  	int copper_seen = 0;
  
  	ethtool_link_ksettings_zero_link_mode(ks, supported);
  
  	if (!idev->port_info) {
  		netdev_err(netdev, "port_info not initialized\n");
  		return -EOPNOTSUPP;
  	}
  
  	/* The port_info data is found in a DMA space that the NIC keeps
  	 * up-to-date, so there's no need to request the data from the
  	 * NIC, we already have it in our memory space.
  	 */
  
  	switch (le16_to_cpu(idev->port_info->status.xcvr.pid)) {
  		/* Copper */
  	case IONIC_XCVR_PID_QSFP_100G_CR4:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     100000baseCR4_Full);
  		copper_seen++;
  		break;
  	case IONIC_XCVR_PID_QSFP_40GBASE_CR4:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     40000baseCR4_Full);
  		copper_seen++;
  		break;
  	case IONIC_XCVR_PID_SFP_25GBASE_CR_S:
  	case IONIC_XCVR_PID_SFP_25GBASE_CR_L:
  	case IONIC_XCVR_PID_SFP_25GBASE_CR_N:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     25000baseCR_Full);
  		copper_seen++;
  		break;
  	case IONIC_XCVR_PID_SFP_10GBASE_AOC:
  	case IONIC_XCVR_PID_SFP_10GBASE_CU:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     10000baseCR_Full);
  		copper_seen++;
  		break;
  
  		/* Fibre */
  	case IONIC_XCVR_PID_QSFP_100G_SR4:
  	case IONIC_XCVR_PID_QSFP_100G_AOC:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     100000baseSR4_Full);
  		break;
  	case IONIC_XCVR_PID_QSFP_100G_CWDM4:
  	case IONIC_XCVR_PID_QSFP_100G_PSM4:
  	case IONIC_XCVR_PID_QSFP_100G_LR4:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     100000baseLR4_ER4_Full);
  		break;
  	case IONIC_XCVR_PID_QSFP_100G_ER4:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     100000baseLR4_ER4_Full);
  		break;
  	case IONIC_XCVR_PID_QSFP_40GBASE_SR4:
  	case IONIC_XCVR_PID_QSFP_40GBASE_AOC:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     40000baseSR4_Full);
  		break;
  	case IONIC_XCVR_PID_QSFP_40GBASE_LR4:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     40000baseLR4_Full);
  		break;
  	case IONIC_XCVR_PID_SFP_25GBASE_SR:
  	case IONIC_XCVR_PID_SFP_25GBASE_AOC:
  	case IONIC_XCVR_PID_SFP_25GBASE_ACC:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     25000baseSR_Full);
  		break;
  	case IONIC_XCVR_PID_SFP_10GBASE_SR:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     10000baseSR_Full);
  		break;
  	case IONIC_XCVR_PID_SFP_10GBASE_LR:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     10000baseLR_Full);
  		break;
  	case IONIC_XCVR_PID_SFP_10GBASE_LRM:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     10000baseLRM_Full);
  		break;
  	case IONIC_XCVR_PID_SFP_10GBASE_ER:
  		ethtool_link_ksettings_add_link_mode(ks, supported,
  						     10000baseER_Full);
  		break;
  	case IONIC_XCVR_PID_UNKNOWN:
  		/* This means there's no module plugged in */
  		break;
  	default:
  		dev_info(lif->ionic->dev, "unknown xcvr type pid=%d / 0x%x\n",
  			 idev->port_info->status.xcvr.pid,
  			 idev->port_info->status.xcvr.pid);
  		break;
  	}
  
  	bitmap_copy(ks->link_modes.advertising, ks->link_modes.supported,
  		    __ETHTOOL_LINK_MODE_MASK_NBITS);
  
  	ethtool_link_ksettings_add_link_mode(ks, supported, FEC_BASER);
  	ethtool_link_ksettings_add_link_mode(ks, supported, FEC_RS);
  	if (idev->port_info->config.fec_type == IONIC_PORT_FEC_TYPE_FC)
  		ethtool_link_ksettings_add_link_mode(ks, advertising, FEC_BASER);
  	else if (idev->port_info->config.fec_type == IONIC_PORT_FEC_TYPE_RS)
  		ethtool_link_ksettings_add_link_mode(ks, advertising, FEC_RS);
  
  	ethtool_link_ksettings_add_link_mode(ks, supported, FIBRE);
  	ethtool_link_ksettings_add_link_mode(ks, supported, Pause);
  
  	if (idev->port_info->status.xcvr.phy == IONIC_PHY_TYPE_COPPER ||
  	    copper_seen)
  		ks->base.port = PORT_DA;
  	else if (idev->port_info->status.xcvr.phy == IONIC_PHY_TYPE_FIBER)
  		ks->base.port = PORT_FIBRE;
  	else
  		ks->base.port = PORT_NONE;
  
  	if (ks->base.port != PORT_NONE) {
  		ks->base.speed = le32_to_cpu(lif->info->status.link_speed);
  
  		if (le16_to_cpu(lif->info->status.link_status))
  			ks->base.duplex = DUPLEX_FULL;
  		else
  			ks->base.duplex = DUPLEX_UNKNOWN;
  
  		ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg);
  
  		if (idev->port_info->config.an_enable) {
  			ethtool_link_ksettings_add_link_mode(ks, advertising,
  							     Autoneg);
  			ks->base.autoneg = AUTONEG_ENABLE;
  		}
  	}
  
  	return 0;
  }
  
  static int ionic_set_link_ksettings(struct net_device *netdev,
  				    const struct ethtool_link_ksettings *ks)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	struct ionic *ionic = lif->ionic;
  	struct ionic_dev *idev;
  	int err = 0;
  
  	idev = &lif->ionic->idev;
  
  	/* set autoneg */
  	if (ks->base.autoneg != idev->port_info->config.an_enable) {
  		mutex_lock(&ionic->dev_cmd_lock);
  		ionic_dev_cmd_port_autoneg(idev, ks->base.autoneg);
  		err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
  		mutex_unlock(&ionic->dev_cmd_lock);
  		if (err)
  			return err;
  	}
  
  	/* set speed */
  	if (ks->base.speed != le32_to_cpu(idev->port_info->config.speed)) {
  		mutex_lock(&ionic->dev_cmd_lock);
  		ionic_dev_cmd_port_speed(idev, ks->base.speed);
  		err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
  		mutex_unlock(&ionic->dev_cmd_lock);
  		if (err)
  			return err;
  	}
  
  	return 0;
  }
  
  static void ionic_get_pauseparam(struct net_device *netdev,
  				 struct ethtool_pauseparam *pause)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	u8 pause_type;
  
  	pause->autoneg = 0;
  
  	pause_type = lif->ionic->idev.port_info->config.pause_type;
  	if (pause_type) {
  		pause->rx_pause = (pause_type & IONIC_PAUSE_F_RX) ? 1 : 0;
  		pause->tx_pause = (pause_type & IONIC_PAUSE_F_TX) ? 1 : 0;
  	}
  }
  
  static int ionic_set_pauseparam(struct net_device *netdev,
  				struct ethtool_pauseparam *pause)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	struct ionic *ionic = lif->ionic;
  	u32 requested_pause;
  	int err;
  
  	if (pause->autoneg)
  		return -EOPNOTSUPP;
  
  	/* change both at the same time */
  	requested_pause = IONIC_PORT_PAUSE_TYPE_LINK;
  	if (pause->rx_pause)
  		requested_pause |= IONIC_PAUSE_F_RX;
  	if (pause->tx_pause)
  		requested_pause |= IONIC_PAUSE_F_TX;
  
  	if (requested_pause == lif->ionic->idev.port_info->config.pause_type)
  		return 0;
  
  	mutex_lock(&ionic->dev_cmd_lock);
  	ionic_dev_cmd_port_pause(&lif->ionic->idev, requested_pause);
  	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
  	mutex_unlock(&ionic->dev_cmd_lock);
  	if (err)
  		return err;
  
  	return 0;
  }
  
  static int ionic_get_fecparam(struct net_device *netdev,
  			      struct ethtool_fecparam *fec)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  
  	switch (lif->ionic->idev.port_info->config.fec_type) {
  	case IONIC_PORT_FEC_TYPE_NONE:
  		fec->active_fec = ETHTOOL_FEC_OFF;
  		break;
  	case IONIC_PORT_FEC_TYPE_RS:
  		fec->active_fec = ETHTOOL_FEC_RS;
  		break;
  	case IONIC_PORT_FEC_TYPE_FC:
  		fec->active_fec = ETHTOOL_FEC_BASER;
  		break;
  	}
  
  	fec->fec = ETHTOOL_FEC_OFF | ETHTOOL_FEC_RS | ETHTOOL_FEC_BASER;
  
  	return 0;
  }
  
  static int ionic_set_fecparam(struct net_device *netdev,
  			      struct ethtool_fecparam *fec)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	u8 fec_type;
  	int ret = 0;
  
  	if (lif->ionic->idev.port_info->config.an_enable) {
  		netdev_err(netdev, "FEC request not allowed while autoneg is enabled\n");
  		return -EINVAL;
  	}
  
  	switch (fec->fec) {
  	case ETHTOOL_FEC_NONE:
  		fec_type = IONIC_PORT_FEC_TYPE_NONE;
  		break;
  	case ETHTOOL_FEC_OFF:
  		fec_type = IONIC_PORT_FEC_TYPE_NONE;
  		break;
  	case ETHTOOL_FEC_RS:
  		fec_type = IONIC_PORT_FEC_TYPE_RS;
  		break;
  	case ETHTOOL_FEC_BASER:
  		fec_type = IONIC_PORT_FEC_TYPE_FC;
  		break;
  	case ETHTOOL_FEC_AUTO:
  	default:
  		netdev_err(netdev, "FEC request 0x%04x not supported\n",
  			   fec->fec);
  		return -EINVAL;
  	}
  
  	if (fec_type != lif->ionic->idev.port_info->config.fec_type) {
  		mutex_lock(&lif->ionic->dev_cmd_lock);
  		ionic_dev_cmd_port_fec(&lif->ionic->idev, fec_type);
  		ret = ionic_dev_cmd_wait(lif->ionic, DEVCMD_TIMEOUT);
  		mutex_unlock(&lif->ionic->dev_cmd_lock);
  	}
  
  	return ret;
  }
  
  static int ionic_get_coalesce(struct net_device *netdev,
  			      struct ethtool_coalesce *coalesce)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  
  	coalesce->tx_coalesce_usecs = lif->tx_coalesce_usecs;
  	coalesce->rx_coalesce_usecs = lif->rx_coalesce_usecs;
  
  	if (test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state))
  		coalesce->use_adaptive_tx_coalesce = test_bit(IONIC_LIF_F_TX_DIM_INTR, lif->state);
  	else
  		coalesce->use_adaptive_tx_coalesce = 0;
  
  	coalesce->use_adaptive_rx_coalesce = test_bit(IONIC_LIF_F_RX_DIM_INTR, lif->state);
  
  	return 0;
  }
  
  static int ionic_set_coalesce(struct net_device *netdev,
  			      struct ethtool_coalesce *coalesce)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	struct ionic_identity *ident;
  	u32 rx_coal, rx_dim;
  	u32 tx_coal, tx_dim;
  	unsigned int i;
  
  	ident = &lif->ionic->ident;
  	if (ident->dev.intr_coal_div == 0) {
  		netdev_warn(netdev, "bad HW value in dev.intr_coal_div = %d\n",
  			    ident->dev.intr_coal_div);
  		return -EIO;
  	}
  
  	/* Tx normally shares Rx interrupt, so only change Rx if not split */
  	if (!test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state) &&
  	    (coalesce->tx_coalesce_usecs != lif->rx_coalesce_usecs ||
  	     coalesce->use_adaptive_tx_coalesce)) {
  		netdev_warn(netdev, "only rx parameters can be changed\n");
  		return -EINVAL;
  	}
  
  	/* Convert the usec request to a HW usable value.  If they asked
  	 * for non-zero and it resolved to zero, bump it up
  	 */
  	rx_coal = ionic_coal_usec_to_hw(lif->ionic, coalesce->rx_coalesce_usecs);
  	if (!rx_coal && coalesce->rx_coalesce_usecs)
  		rx_coal = 1;
  	tx_coal = ionic_coal_usec_to_hw(lif->ionic, coalesce->tx_coalesce_usecs);
  	if (!tx_coal && coalesce->tx_coalesce_usecs)
  		tx_coal = 1;
  
  	if (rx_coal > IONIC_INTR_CTRL_COAL_MAX ||
  	    tx_coal > IONIC_INTR_CTRL_COAL_MAX)
  		return -ERANGE;
  
  	/* Save the new values */
  	lif->rx_coalesce_usecs = coalesce->rx_coalesce_usecs;
  	lif->rx_coalesce_hw = rx_coal;
  
  	if (test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state))
  		lif->tx_coalesce_usecs = coalesce->tx_coalesce_usecs;
  	else
  		lif->tx_coalesce_usecs = coalesce->rx_coalesce_usecs;
  	lif->tx_coalesce_hw = tx_coal;
  
  	if (coalesce->use_adaptive_rx_coalesce) {
  		set_bit(IONIC_LIF_F_RX_DIM_INTR, lif->state);
  		rx_dim = rx_coal;
  	} else {
  		clear_bit(IONIC_LIF_F_RX_DIM_INTR, lif->state);
  		rx_dim = 0;
  	}
  
  	if (coalesce->use_adaptive_tx_coalesce) {
  		set_bit(IONIC_LIF_F_TX_DIM_INTR, lif->state);
  		tx_dim = tx_coal;
  	} else {
  		clear_bit(IONIC_LIF_F_TX_DIM_INTR, lif->state);
  		tx_dim = 0;
  	}
  
  	if (test_bit(IONIC_LIF_F_UP, lif->state)) {
  		for (i = 0; i < lif->nxqs; i++) {
  			if (lif->rxqcqs[i]->flags & IONIC_QCQ_F_INTR) {
  				ionic_intr_coal_init(lif->ionic->idev.intr_ctrl,
  						     lif->rxqcqs[i]->intr.index,
  						     lif->rx_coalesce_hw);
  				lif->rxqcqs[i]->intr.dim_coal_hw = rx_dim;
  			}
  
  			if (lif->txqcqs[i]->flags & IONIC_QCQ_F_INTR) {
  				ionic_intr_coal_init(lif->ionic->idev.intr_ctrl,
  						     lif->txqcqs[i]->intr.index,
  						     lif->tx_coalesce_hw);
  				lif->txqcqs[i]->intr.dim_coal_hw = tx_dim;
  			}
  		}
  	}
  
  	return 0;
  }
  
  static void ionic_get_ringparam(struct net_device *netdev,
  				struct ethtool_ringparam *ring)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  
  	ring->tx_max_pending = IONIC_MAX_TX_DESC;
  	ring->tx_pending = lif->ntxq_descs;
  	ring->rx_max_pending = IONIC_MAX_RX_DESC;
  	ring->rx_pending = lif->nrxq_descs;
  }
  
  static int ionic_set_ringparam(struct net_device *netdev,
  			       struct ethtool_ringparam *ring)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	struct ionic_queue_params qparam;
  	int err;
  
  	ionic_init_queue_params(lif, &qparam);
  
  	if (ring->rx_mini_pending || ring->rx_jumbo_pending) {
  		netdev_info(netdev, "Changing jumbo or mini descriptors not supported\n");
  		return -EINVAL;
  	}
  
  	if (!is_power_of_2(ring->tx_pending) ||
  	    !is_power_of_2(ring->rx_pending)) {
  		netdev_info(netdev, "Descriptor count must be a power of 2\n");
  		return -EINVAL;
  	}
  
  	/* if nothing to do return success */
  	if (ring->tx_pending == lif->ntxq_descs &&
  	    ring->rx_pending == lif->nrxq_descs)
  		return 0;
  
  	if (ring->tx_pending != lif->ntxq_descs)
  		netdev_info(netdev, "Changing Tx ring size from %d to %d\n",
  			    lif->ntxq_descs, ring->tx_pending);
  
  	if (ring->rx_pending != lif->nrxq_descs)
  		netdev_info(netdev, "Changing Rx ring size from %d to %d\n",
  			    lif->nrxq_descs, ring->rx_pending);
  
  	/* if we're not running, just set the values and return */
  	if (!netif_running(lif->netdev)) {
  		lif->ntxq_descs = ring->tx_pending;
  		lif->nrxq_descs = ring->rx_pending;
  		return 0;
  	}
  
  	qparam.ntxq_descs = ring->tx_pending;
  	qparam.nrxq_descs = ring->rx_pending;
  	err = ionic_reconfigure_queues(lif, &qparam);
  	if (err)
  		netdev_info(netdev, "Ring reconfiguration failed, changes canceled: %d\n", err);
  
  	return err;
  }
  
  static void ionic_get_channels(struct net_device *netdev,
  			       struct ethtool_channels *ch)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  
  	/* report maximum channels */
  	ch->max_combined = lif->ionic->ntxqs_per_lif;
  	ch->max_rx = lif->ionic->ntxqs_per_lif / 2;
  	ch->max_tx = lif->ionic->ntxqs_per_lif / 2;
  
  	/* report current channels */
  	if (test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state)) {
  		ch->rx_count = lif->nxqs;
  		ch->tx_count = lif->nxqs;
  	} else {
  		ch->combined_count = lif->nxqs;
  	}
  }
  
  static int ionic_set_channels(struct net_device *netdev,
  			      struct ethtool_channels *ch)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	struct ionic_queue_params qparam;
  	int max_cnt;
  	int err;
  
  	ionic_init_queue_params(lif, &qparam);
  
  	if (ch->rx_count != ch->tx_count) {
  		netdev_info(netdev, "The rx and tx count must be equal\n");
  		return -EINVAL;
  	}
  
  	if (ch->combined_count && ch->rx_count) {
  		netdev_info(netdev, "Use either combined or rx and tx, not both\n");
  		return -EINVAL;
  	}
  
  	max_cnt = lif->ionic->ntxqs_per_lif;
  	if (ch->combined_count) {
  		if (ch->combined_count > max_cnt)
  			return -EINVAL;
  
  		if (test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state))
  			netdev_info(lif->netdev, "Sharing queue interrupts\n");
  		else if (ch->combined_count == lif->nxqs)
  			return 0;
  
  		if (lif->nxqs != ch->combined_count)
  			netdev_info(netdev, "Changing queue count from %d to %d\n",
  				    lif->nxqs, ch->combined_count);
  
  		qparam.nxqs = ch->combined_count;
  		qparam.intr_split = 0;
  	} else {
  		max_cnt /= 2;
  		if (ch->rx_count > max_cnt)
  			return -EINVAL;
  
  		if (!test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state))
  			netdev_info(lif->netdev, "Splitting queue interrupts\n");
  		else if (ch->rx_count == lif->nxqs)
  			return 0;
  
  		if (lif->nxqs != ch->rx_count)
  			netdev_info(netdev, "Changing queue count from %d to %d\n",
  				    lif->nxqs, ch->rx_count);
  
  		qparam.nxqs = ch->rx_count;
  		qparam.intr_split = 1;
  	}
  
  	/* if we're not running, just set the values and return */
  	if (!netif_running(lif->netdev)) {
  		lif->nxqs = qparam.nxqs;
  
  		if (qparam.intr_split) {
  			set_bit(IONIC_LIF_F_SPLIT_INTR, lif->state);
  		} else {
  			clear_bit(IONIC_LIF_F_SPLIT_INTR, lif->state);
  			lif->tx_coalesce_usecs = lif->rx_coalesce_usecs;
  			lif->tx_coalesce_hw = lif->rx_coalesce_hw;
  		}
  		return 0;
  	}
  
  	err = ionic_reconfigure_queues(lif, &qparam);
  	if (err)
  		netdev_info(netdev, "Queue reconfiguration failed, changes canceled: %d\n", err);
  
  	return err;
  }
  
  static u32 ionic_get_priv_flags(struct net_device *netdev)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	u32 priv_flags = 0;
  
  	if (test_bit(IONIC_LIF_F_SW_DEBUG_STATS, lif->state))
  		priv_flags |= IONIC_PRIV_F_SW_DBG_STATS;
  
  	return priv_flags;
  }
  
  static int ionic_set_priv_flags(struct net_device *netdev, u32 priv_flags)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  
  	clear_bit(IONIC_LIF_F_SW_DEBUG_STATS, lif->state);
  	if (priv_flags & IONIC_PRIV_F_SW_DBG_STATS)
  		set_bit(IONIC_LIF_F_SW_DEBUG_STATS, lif->state);
  
  	return 0;
  }
  
  static int ionic_get_rxnfc(struct net_device *netdev,
  			   struct ethtool_rxnfc *info, u32 *rules)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	int err = 0;
  
  	switch (info->cmd) {
  	case ETHTOOL_GRXRINGS:
  		info->data = lif->nxqs;
  		break;
  	default:
  		netdev_err(netdev, "Command parameter %d is not supported\n",
  			   info->cmd);
  		err = -EOPNOTSUPP;
  	}
  
  	return err;
  }
  
  static u32 ionic_get_rxfh_indir_size(struct net_device *netdev)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  
  	return le16_to_cpu(lif->ionic->ident.lif.eth.rss_ind_tbl_sz);
  }
  
  static u32 ionic_get_rxfh_key_size(struct net_device *netdev)
  {
  	return IONIC_RSS_HASH_KEY_SIZE;
  }
  
  static int ionic_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
  			  u8 *hfunc)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	unsigned int i, tbl_sz;
  
  	if (indir) {
  		tbl_sz = le16_to_cpu(lif->ionic->ident.lif.eth.rss_ind_tbl_sz);
  		for (i = 0; i < tbl_sz; i++)
  			indir[i] = lif->rss_ind_tbl[i];
  	}
  
  	if (key)
  		memcpy(key, lif->rss_hash_key, IONIC_RSS_HASH_KEY_SIZE);
  
  	if (hfunc)
  		*hfunc = ETH_RSS_HASH_TOP;
  
  	return 0;
  }
  
  static int ionic_set_rxfh(struct net_device *netdev, const u32 *indir,
  			  const u8 *key, const u8 hfunc)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	int err;
  
  	if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
  		return -EOPNOTSUPP;
  
  	err = ionic_lif_rss_config(lif, lif->rss_types, key, indir);
  	if (err)
  		return err;
  
  	return 0;
  }
  
  static int ionic_set_tunable(struct net_device *dev,
  			     const struct ethtool_tunable *tuna,
  			     const void *data)
  {
  	struct ionic_lif *lif = netdev_priv(dev);
  
  	switch (tuna->id) {
  	case ETHTOOL_RX_COPYBREAK:
  		lif->rx_copybreak = *(u32 *)data;
  		break;
  	default:
  		return -EOPNOTSUPP;
  	}
  
  	return 0;
  }
  
  static int ionic_get_tunable(struct net_device *netdev,
  			     const struct ethtool_tunable *tuna, void *data)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  
  	switch (tuna->id) {
  	case ETHTOOL_RX_COPYBREAK:
  		*(u32 *)data = lif->rx_copybreak;
  		break;
  	default:
  		return -EOPNOTSUPP;
  	}
  
  	return 0;
  }
  
  static int ionic_get_module_info(struct net_device *netdev,
  				 struct ethtool_modinfo *modinfo)
  
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	struct ionic_dev *idev = &lif->ionic->idev;
  	struct ionic_xcvr_status *xcvr;
  	struct sfp_eeprom_base *sfp;
  
  	xcvr = &idev->port_info->status.xcvr;
  	sfp = (struct sfp_eeprom_base *) xcvr->sprom;
  
  	/* report the module data type and length */
  	switch (sfp->phys_id) {
  	case SFF8024_ID_SFP:
  		modinfo->type = ETH_MODULE_SFF_8079;
  		modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
  		break;
  	case SFF8024_ID_QSFP_8436_8636:
  	case SFF8024_ID_QSFP28_8636:
  		modinfo->type = ETH_MODULE_SFF_8436;
  		modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
  		break;
  	default:
  		netdev_info(netdev, "unknown xcvr type 0x%02x\n",
  			    xcvr->sprom[0]);
  		modinfo->type = 0;
  		modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
  		break;
  	}
  
  	return 0;
  }
  
  static int ionic_get_module_eeprom(struct net_device *netdev,
  				   struct ethtool_eeprom *ee,
  				   u8 *data)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	struct ionic_dev *idev = &lif->ionic->idev;
  	struct ionic_xcvr_status *xcvr;
  	char tbuf[sizeof(xcvr->sprom)];
  	int count = 10;
  	u32 len;
  
  	/* The NIC keeps the module prom up-to-date in the DMA space
  	 * so we can simply copy the module bytes into the data buffer.
  	 */
  	xcvr = &idev->port_info->status.xcvr;
  	len = min_t(u32, sizeof(xcvr->sprom), ee->len);
  
  	do {
  		memcpy(data, xcvr->sprom, len);
  		memcpy(tbuf, xcvr->sprom, len);
  
  		/* Let's make sure we got a consistent copy */
  		if (!memcmp(data, tbuf, len))
  			break;
  
  	} while (--count);
  
  	if (!count)
  		return -ETIMEDOUT;
  
  	return 0;
  }
  
  static int ionic_nway_reset(struct net_device *netdev)
  {
  	struct ionic_lif *lif = netdev_priv(netdev);
  	struct ionic *ionic = lif->ionic;
  	int err = 0;
  
  	/* flap the link to force auto-negotiation */
  
  	mutex_lock(&ionic->dev_cmd_lock);
  
  	ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_DOWN);
  	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
  
  	if (!err) {
  		ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_UP);
  		err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
  	}
  
  	mutex_unlock(&ionic->dev_cmd_lock);
  
  	return err;
  }
  
  static const struct ethtool_ops ionic_ethtool_ops = {
  	.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
  				     ETHTOOL_COALESCE_USE_ADAPTIVE_RX |
  				     ETHTOOL_COALESCE_USE_ADAPTIVE_TX,
  	.get_drvinfo		= ionic_get_drvinfo,
  	.get_regs_len		= ionic_get_regs_len,
  	.get_regs		= ionic_get_regs,
  	.get_link		= ethtool_op_get_link,
  	.get_link_ksettings	= ionic_get_link_ksettings,
  	.set_link_ksettings	= ionic_set_link_ksettings,
  	.get_coalesce		= ionic_get_coalesce,
  	.set_coalesce		= ionic_set_coalesce,
  	.get_ringparam		= ionic_get_ringparam,
  	.set_ringparam		= ionic_set_ringparam,
  	.get_channels		= ionic_get_channels,
  	.set_channels		= ionic_set_channels,
  	.get_strings		= ionic_get_strings,
  	.get_ethtool_stats	= ionic_get_stats,
  	.get_sset_count		= ionic_get_sset_count,
  	.get_priv_flags		= ionic_get_priv_flags,
  	.set_priv_flags		= ionic_set_priv_flags,
  	.get_rxnfc		= ionic_get_rxnfc,
  	.get_rxfh_indir_size	= ionic_get_rxfh_indir_size,
  	.get_rxfh_key_size	= ionic_get_rxfh_key_size,
  	.get_rxfh		= ionic_get_rxfh,
  	.set_rxfh		= ionic_set_rxfh,
  	.get_tunable		= ionic_get_tunable,
  	.set_tunable		= ionic_set_tunable,
  	.get_module_info	= ionic_get_module_info,
  	.get_module_eeprom	= ionic_get_module_eeprom,
  	.get_pauseparam		= ionic_get_pauseparam,
  	.set_pauseparam		= ionic_set_pauseparam,
  	.get_fecparam		= ionic_get_fecparam,
  	.set_fecparam		= ionic_set_fecparam,
  	.nway_reset		= ionic_nway_reset,
  };
  
  void ionic_ethtool_set_ops(struct net_device *netdev)
  {
  	netdev->ethtool_ops = &ionic_ethtool_ops;
  }
  